Method and apparatus for producing an automobile windshield molding

Abstract: The present invention is directed to a method and apparatus for producing an automobile windshield molding (2) for decorating along a periphery of a windshield located in an opening of a vehicle body panel, using an extruding apparatus including a plurality of dies, said automobile windshield molding having an exterior wing (2M), extending when installed along said periphery of the windshield, the cross-sectional profile of which continuously varies in a longitudinal direction from a second molding section (2C) to a first molding section (2A) and which has a water drain channel (2B) in and along the second molding section, said method comprising the steps of: forming an outer surface and an inner surface of the exterior wing and an inner surface of the water drain channel by extruding through dies disposed to correspond with each of said surfaces; gradually changing the position of said dies in a direction perpendicular to an extruding direction when moving from the forming of said second molding section to the first molding section; moving the die for forming the water drain channel with distance from the other dies so as to reduce the size of the water drain channel from the second molding section to the first molding section.

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention: The invention relates to a method of producing an automobile windshield molding as claimed in claim 1, which is for sealing the space between a windshield and a periphery of a window opening of a vehicle body panel so as to seal the space between the windshield and the periphery of the window opening of the vehicle body panel. In addition, the invention relates to an apparatus for conducting the method of this invention, which is claimed in claim 15. 2. Description of the Related Art: An automobile windshield molding is usually attached around an edge of a windshield so as to seal the space between a windshield and a window opening of a vehicle body panel. The automobile windshield molding is directly attached to the vehicle body panel or is supported by a fastener fixedly mounted on the body panel. Examples of such molding are exemplified in Japanese Patent Laid-Open Publication JP-A-244820/1989 and JP-A-269612/1989. In the former, and extruded molding has two grooves on its side surfaces. One of the two grooves is removed at a portion associated with the upper part of the windshield. At corner portions, the molding is elastically reshaped so that the glass receiving groove on the upper part and that on the side part can be aligned. The other groove on the molding at each side panel part serves as a water drain channel. Since the cross section of this molding is uniform, the molding cannot be applied to a vehicle body panel having a slanted portion for the windshield. In addition, the ends of the removed groove may be exposed at the corner portions. To overcome the above inconveniences, Japanese patent laid-open publication JP-A-269612/1989 was proposed, in which a long extruded molding is of a simple shape and has a connecting portion. The connecting portion is cut at the upper and side molding parts so that the connecting portion extends to different heights at these molding parts. A glass receiving groove is formed when cutting the connecting portion. Then the molding is elastically reshaped so that the glass receiving groove at the upper molding part and that at the side molding part can be aligned. At the side molding part, the connecting portion serves as a wall, outside of which a water drain channel is formed. In the second case, there are some inconveniences. For example, a part of the molding should extend over the glass surface to a certain amount when considering variations in manufacturing precision or assembling work. In such a case, the more the molding extends over the glass surface, the less the sectional area of the water drain channel. From JP-A-1-269612/89 it is already known to provide an automobile windshield molding for sealing the space between a windshield and a periphery of a window opening of a vehicle body panel, which molding comprises a pair of extruded side molding parts, a pair of extruded corner molding parts and an extruded upper modling part integral with and extending between the side and corner molding parts, each of the side, corner and upper molding parts including: an exterior wing adapted to cover a space, on the exterior side of the vehicle, between the window-opening periphery of the vehicle body panel and each of side, corner und upper edges of the windshield, said exterior wing including an inward wing portion for covering the peripheral edge of the windshield and an outward wing portion being in flexible contact with the periphery of the vehicle body panel, said inward wing portion associated with each said corner edge and each said side edge of the windshield having a large-thickness part gradually increasing in thickness compared to said inward wing portion associated with said upper edge of the windshield, such side inward wing portion having a water drain channel which extends in and along said large-thickness part and opens inwardly of the window opening; and a connecting portion extending from an interior side of each said exterior wing through the space between the window-opening periphery of the vehicle body panel and each said edge of the windshield and terminating in a foot on the interior side of the vehicle body panel and a lip on the exterior side of the vehicle body panel so that the peripheral edge of the windshield is received in a single groove formed between said inward wing portion and said foot of said connecting portion. Thus with this known construction the connecting portion includes a groove which receives a peripheral edge of the windshield glass through an upper section, a corner section and a side section. In the side section, the water retaining channel is defined to be surrounded by the inner surface of the wing portion, a lip and the windshield glass. With this known construction the width of the inward lip of said portion from the connecting portion to the inside edge is uniformly dimensioned throughout the entire molding. Therefore, the width of the wall contacting the periphery of the windshield glass is different between the side section and the upper section and moreover the upper section is larger than the side section. This width has to be dimensioned so as to have an appropriate width for fitting as well as holding purposes. However, this known construction is not advantages both as to a view to the width of the vehicle body which should be constructed as light as possible as also to a view to the effect of decreasing the visible range for driving and additionally with a view to the waste of material resulting therefrom. SUMMARY OF THE INVENTION FR-A-2 579 927 discloses a process to manufacture a molding for sealing a gap between a bodywork of a vehicle and a movable part of this bodywork. To be able to cross over different distances between the bodywork and, for instance, the edge of a door, a leg of the molding is varied in length to seal the space between the bodywork and the door. According to the present invention, there is provided a method and an apparatus for producing an automobile windshield molding for decorating along a periphery of a windshield located in an opening of a vehicle body panel as defined in claims 1 and 15 respectively. Further improved variations and embodiments of the present invention result from the subclaims 2 to 14 and 16 to 25. The automobile windshield molding directly obtained by the method claimed in claims 1 to 14 of the present patent has been claimed in EP-B-0 478 878 as far as DE and GB are concerned, since EP-B-0 478 878 enjoys the same priority dates as the present patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front perspective view of a vehicle body having a windshield molding; FIG. 2 is a perspective view of a windshield molding according to a first embodiment of the invention; FIG. 3 is a cross-sectional view taken along the line I-I of FIG. 1; FIG. 4 is a cross-sectional view taken along the line II-II of FIG. 3; FIG. 5 is a cross-sectional view taken along the line III-III of FIG. 3; FIG. 6 is a cross-sectional view taken along the line IV-IV of FIG. 3; FIG. 7 is a front elevational view of a molding machine; FIG. 8 shows the manner in which the molding machine operates; FIG. 9 is a perspective view of a molding according to a second embodiment of the invention; FIG. 10 is a cross-sectional view taken along the line V-V of FIG. 9; FIG. 11 is a cross-sectional view taken along the line VI-VI of FIG. 9; FIG. 12 is a cross-sectional view taken along the line VII-VII of FIG. 9; FIG. 13 is a partial cross-sectional view of a corner portion of a windshield molding according to a third embodiment of the invention; FIG. 14 is an enlarged cross-sectional view taken along the line X-X of FIG. 13; FIG. 15 is an enlarged cross-sectional view taken along the line Y-Y of FIG. 13; FIG. 16 is a cross-sectional view of a corner portion of a windshield molding according to a fourth embodiment; FIG. 17 is a cross-sectional view taken along the line X-X of FIG. 16; FIG. 18 is a cross-sectional view taken along the line Y 1 - Y 1 of FIG. 17; FIG. 19 is a cross-sectional view taken along the line Y 2 - Y 2 of FIG. 17; FIG. 20 is a schematic perspective view showing the surface of a side molding; FIG. 21 to FIG. 23 are front elevational views showing the manner in which the molding machine operates successively; FIG. 24 is an enlarged sectional view showing a windshield molding according to a fifth embodiment; FIG. 25 is a cross-sectional view taken along the line Z1 - Z1 of FIG. 24; and FIG. 26 is a cross-sectional view taken along the line Z2 - Z2 of FIG. 24. DETAILED DESCRIPTION Embodiment 1: An automobile windshield molding according to one embodiment of the invention is shown in FIGS. 1 to 6. As shown in FIG. 1, a molding 2 is installed so as to seal the space between a windshield and a periphery of a window opening of a vehicle body panel. The molding 2 is a long strip in the shape of T, and an upper molding part 2A to be mounted between the upper edge of the windshield and the roof panel 12, side molding parts 2C between side edges of the windshield 11 and pillar panels 13 of the vehicle body, and corner molding parts 2B for connecting the upper and side molding parts 2A and 2C. All of these molding parts 2A to 2C are extruded as one unit. Each of the upper, corner and side molding parts 2A to 2C comprises an exterior wing 21 adapted to cover a space, on the exterior side of the vehicle, between the window-opening periphery of the vehicle body panel and each of side, corner and upper edges of the windshield. The exterior wing 21 includes an inward wing portion 21a for covering the peripheral edge of the windshield, an outward wing portion 21b for covering the periphery of the vehicle body panel, and a connecting portion 22 extending from an interior side of the exterior wing 21. The outward wing portion 21b has a uniform thickness in its lengthwise direction. On the contrary, the inward wing portion 21a is uniformly thick on the upper molding part 2A, but is thickened gradually from the corner molding part 2B to the side molding part 2C. Specifically, the inward wing portion 21a is thickest at the central portion of the side molding part 2C. Then the inward wing portion 21a is made gradually thin toward the end of the side molding part 2C. The connecting portion 22 divides the interior side of the exterior wing into inward and outward surfaces. There is a varying difference in height between the inward and outward surfaces. The connecting portion 22 is short on the upper molding part 2A (shown in FIG. 3), and gradually becomes longer on the side molding parts 2C (shown in FIGS. 4 to 6), because the distance between the surface of the windshield 11 and the surface of the front pillars 13 is increased compared with the distance between the surface of the windshield 11 and the surface of the roof panel. Specifically, the connecting portion 22 is made gradually longer from the corner molding part 2B toward the central portion of the side molding part 2C, and is again made a little shorter at the end of the side molding part 2C. The connecting portion 22 has a foot 24 extending inwardly along the end thereof as shown in FIG. 2. The foot 24 serves to assist in supporting the windshield 11. The connecting portion 22 also has a flexible lip which 25 extends outwardly along the end thereof. A thin metallic foil 23 serving as a core metal is embedded lengthwise in the connecting portion 22 near the junction with the exterior wing 21. A water drain channel each 28 is defined on an inner wall of the large-thickness part of the inward wing portion 21a of each side molding part 2C so as to be surrounded with said upper wall and lower wall of the inward wing portion 21a. The water drain channel 28 has a triangular cross section and is gradually deepened as the inward wing portion 21a becomes thick. An upper wall 212a and a lower wall 211a of the inward wing portion 21a are made equally thick by adjusting the depth of the water drain channel 28. The drain channel 28 is located on the inward wing portion 21a between the end 2D of the corner molding part 2B and the end of the side molding part 2C. The upper surface of the foot 24 and the interior side of the inward wing portion 21a are aligned in height with each other throughout all of the molding parts. In other words, the distance between the foot 24 and the inward wing portion 21a is equal to the thickness of the windshield 11. The molding 2 will be attached to the windshield 11 and the vehicle body as described below. FIGS. 3 to 6 show the manner in which the molding 2 is attached between the corner and the side edges of the windshield 11. A window opening of the roof panel 12 has a slanted wall 12a and a flange 12b for receiving the windshield 11. The front pillar 13 also has a slanted wall 13a and the flange 13b for receiving the windshield 11. The slanted wall 13a has a height increased gradually from the corner to the side of the vehicle body panel compared with the slanted wall 12a. Firstly, the molding 2 is attached around the peripheral edge of the windshield 11. Between the upper and corner parts, the edge of the windshield 11 is sandwiched between the foot 24 and the interior side of the inward wing portion 21a. Each of the side edges of the windshield 11 is sandwiched between the foot 24 and the interior side of the wall 211a. A dam rubber 14 in strip shape is applied around the edges of the flanges 12b and 13b. An adhesive 15 is applied to the outer edge of the dam rubber 14. Then the windshield 11 having the molding 2 mounted therearound is placed on the dam rubber 14. The windshield 11 is then pressed toward the vehicle body, so that the outward wing portion 21b of the molding 2 overlies the body panels 12, 13. Therefore, the foot 24 of the molding 2 is fastened by the adhesive 15, and the flexible lip 25 of the molding 2 is flexibly contacted to the slanted walls 12a, 13a, thereby fastening the windshield 11 to the body panel. The difference or the height between the outer surface of the body panel and the windshield 11 is equal to the difference of height between the slanted walls 12a and 13a as shown in FIGS. 3 to 6. As shown in FIG. 3, the upper edge of the windshield 11 is nearly flush with the surface of the roof panel 12. The height difference H 1 is small between the windshield 11 and the corner part of the front pillar 13 (shown in FIG. 4), while the difference H 2 is large at the side edges of the windshield 11 (shown in FIG. 5). The difference H 3 between the end of the side molding part and the front pillar 13 is larger than H 1 but smaller than H 2 (shown in FIG. 6). It is understood that the thickness of the inward wing portion 21a of the molding 2 is changed according to the varying difference of the height between the windshield 11 and the body panel. The edge of the outward wing portion 21b of the molding 2 is in close contact with the roof panel 12 between the upper and corner parts of the windshield 11. From the upper to corner molding parts, the inward wing portion 21a slightly extends toward the outer surface of the windshield 11, i.e. as shown in FIG. 4, the inward wing portion 21a is slightly thickened at the corner molding parts compared with the upper molding part. Therefore water is guided on the surface of the windshield along the wall of the inward wing portion 21a. Since the inward wing portion 21a is slightly thickened at the corner molding parts, the exterior wing 21 is free from wrinkles even if it is bent along the corner portions. FIG. 5 is a cross sectional view of the molding taken along the line III-III of FIG. 3. As shown in FIG. 5, the water drain channel 28 is deepest and widest at the central portion of the side molding part 2C. The edge of the windshield 11 is sandwiched between the foot 24 and the interior side of the wall 211a of the inward wing portion 21a. The outward wing portion 21b is in close contact with the outer surface of the front pillar 13. On the side central portion of the windshield 11, water is guided downwardly along the drain channel 28 which has a largest opening. FIG. 6 is a cross sectional view of the molding taken along the line IV-IV of FIG. 3. The difference of the height between the body panel and the windshield is smaller than that at the side central portion. The drain channel 28 is lessened in its depth and width at the end portion compared with that at the side central portion. The outward wing portion 21b is in contact with the outer surface of the front pillar 13 so that the windshield 11 is sandwiched between the foot 24 and the interior side of the lower wall 211a of the inward wing portion 21a. At the end portion of the molding 2, water is guided downwardly on the windshield along the water drain channel 28. Since the thicknesses of the upper wall 212a and the lower wall 211a are uniform on the side molding part 2C, it will be not unnatural even when the size of the water drain channel 28 changes. A molding device for producing the molding 2 will be described with reference to FIGS. 7 and 8. A molding device 3 comprises dies having openings for extruding a plastic material. A first die 31 has an opening 34 which is shaped according to the cross sectional shape of the molding 2. The opening 34 has portions 341 and 343 corresponding to the shape of the exterior wing of the molding 2. The molding material is extruded through the opening 34. A second die 32 is a rectangular plate having an opening 35 which is shaped according to the cross-sectional shape of the connecting portion 22 of the molding 2. The opening 35 has portions corresponding to the foot 24 and the flexible lip 25. The second die 32 is placed on the first die 31. When the second die 32 is placed on the first die 31, both of the openings 34 and 35 are in the cross sectional shape of the upper molding part 2A. Opposite ends of the second die 32 are guided by a guide 32a so that the second die 32 is slidable longitudinally in the opening 35. The second die 32 is connected via an operation lever 32d to a converter 32b which is driven by a motor 32c so as to convert the rotary motion to the rectilinear motion. A third die 33 slides perpendicularly of the sliding direction of the second die 32, being located above the first die 31. The third die 33 is a thin rectangular plate having a tip 331 pointed with an acute angle. The third die 33 is guided by die guides 33a on opposite sides thereof so as to be movable toward the opening 34 of the first die 31. The third die 33 is connected via an operation lever 33d to a converter 33b which is driven by a motor 33c so as to convert the rotary motion to the rectilinear motion. The position of the third die 33 above the first die 31 is determined so that the third die 33 projects to a predetermined portion in the opening 34. In other words, the third die 33 projects into the opening 34 so that the water drain channel 28 is formed on the side molding 2C. In operation, the molding machine 3 produces the molding 2 as described hereinafter. The molding 2 comprises a side molding part 2C, a corner molding part 2B, upper molding part 2A, a corner molding part 2B and a side molding part 2C formed in the named order in succession. Each of the side molding 2C and corner molding 2B will be described referring to FIG. 8. Firstly, the second die 32 is placed on the first die 31 so that the openings 34 and 35 of the first and second dies are in the cross sectional shape of the side molding 2C. The plastic material is extruded through the openings 34 and 35 together with a metallic foil strip which is inserted in the upper central portion of the opening 35. Then the motor 32c is driven to operate the converter 32b. The converter 32b makes, via the lever 32d, the second die 32 slide in the direction indicated by an arrow X so as to widen the opening 35 (to lengthen the connecting portion). Then the opening 35 is widened at the portion 343 so as to increase the thickness of the inward wing portion 21a of the molding 2. The opening 34 is kept as it is at the portion 341 thereof by a shield 342 regardless of the movement of the second die 32. The portion 341 of the opening 34 corresponds to the outward wing portion 21b of the molding 2. The motor 33c is driven in synchronization with the rotation speed of the motor 32c so as to operate the third die 33. The rotary motion of the motor 33c is converted into the rectilinear motion by the converter 33b so that the third die 33 slides perpendicularly of the second die 32, i.e. in the direction indicated by an arrow W. Then the third die 33 projects into the portion 343 of the opening 34, pushing, with the pointed tip 331, the extruded molding so as to form the inward wing portion. Under this condition, the extruded molding is shaped so that the inward wing portion 21a is thickened gradually to form the water drain channel 28 thereon. When the molding is extruded to a predetermined length, the motors 32c and 33c are rotated reversely. Consequently the second die 32 is moved up in the direction indicated by an arrow Y and in synchronization with the second die 32, the third die 33 is retracted in the direction indicated by an arrow V so that the opening 35 is lessened gradually to shorten the connecting portion of the molding. Therefore the extruded molding serves as the side molding part 2C having the inward wing portion 21a and the drain channel 28 which are decreased in thickness at the end of the corner molding part. Since the third die 33 is retracted in the direction V in synchronization with the moving speed of the second die 32, the depth and the width of the opening of the drain channel 28 change but the thicknesses of the upper wall 212a and the lower wall 211a remain the same in the extruded molding. When the third die 33 is retracted completely from the portion 343 of the opening 34, the second die 32 is moved in the direction Y until the top of the opening 35 of the second die 32 is flush with the top of the shield 342 of the first die 31. Under this condition, the molding extruded from the openings 34 and 35 is shaped so that the inward wing portion 21a is thinned gradually so as to serve as the corner molding part 2B. The top of the shield 342 of the first die 31 and the top of the opening 35 of the second die 32 are flush with each other, i.e. the shape of the openings 34 and 35 matched together corresponds to the cross sectional shape of the upper molding part 2A. Under this condition, the motors are stopped, and the plastic material is extruded through the openings 34 and 35 for a predetermined period of time to produce the upper molding part 2A. When the upper molding part 2A becomes long as predetermined, the motor 32c is driven again to produce the corner molding part 2B. Thus the molding 2 is produced in the shape of a strip. Embodiment 2: A second embodiment of the invention will be described referring to FIGS. 9 to 12. FIG. 9 is a cross sectional view showing a windshield molding 4 attached in the space between the vehicle body penal and the windshield, taken along the line I-I of FIG. 1. The same reference numerals as those in the first embodiment will be assigned to the portions and units which are identical to those in the first embodiment, and the description on them will be omitted. The molding 4 comprises a pair of extruded side molding parts 4C, a pair of extruded corner molding parts 4B, and an extruded upper molding part 4A integral and extending between the side and corner molding parts. Each of the molding parts 4A, 4B and 4C includes an exterior wing 41 and a connecting portion 42. The exterior wing 41 has an inward wing portion 41a and an outward wing portion 41b. The connecting portion 42 has a foot 44 extending inwardly along the lower end thereof. The foot 44 has a dent 444 at its end. A flexible lip 45 extends outwardly along the lower end of the connecting portion 42. A wire 43 serving as a core material is embedded along the joint between the connecting portion 42 and the exterior wing 41 of the molding 4. A metallic decorative film 49 is embedded along the central portion of the exterior wing 41 of the molding 4, i.e. along the border between the inward wing portion 41a and the outward wing portion 41b. The outward wing portion 41b has a uniform thickness throughout the molding 4. The thickness of the inward wing portion 41a of the molding 4 is changed according to the varying difference of height between the body panels 12, 13 and the windshield. The depth and width of a water drain channel 48 are varied with the thickness of the inward wing portion 41a. In addition, an upper wall 412a and a lower wall 411a are uniformly thick throughout the side molding part 4C, respectively. The windshield 11 will be installed on the vehicle body by using the molding 4 as described below. FIG. 10 is a cross sectional view of the molding 4 taken along the line V-V of FIG. 9. At the upper and corner molding parts, the interior edge of the windshield 11 is supported on the dent 444 of the foot 44. The inward wing portion 41a covers the exterior edge of the windshield 11. The outward wing portion 41b is in close contact with and covers the corner part of the front pillar 13. The flexible lip 45 is contacted to a slanted wall 13a of the front pillar 13. The water on the windshield 11 is guided along the thickened wall 411 of the inward wing portion 41a. FIG. 11 is a cross sectional view taken along the line VI-VI of FIG. 9. At the end of the corner molding part, a water drain channel 48 is narrower and shallower than that at the central portion of the side molding part 4C. At the end of the corner portion, water is guided in the drain channel 48 along the lower wall 411a. FIG. 12 is a cross sectional view, taken along the line VII-VII of FIG. 9, at the central portion of the side molding part 4C. At the central portion of the side molding part 4C, the drain channel 48 is widened and deepened on the lower wall 411a. The water is guided through the enlarged drain channel 48. Embodiment 3: FIG. 13 shows a third embodiment of the invention. As shown in FIG. 13, a molding 5 comprises a pair of extruded side molding parts 5C, a pair of extruded corner molding parts 5B, and an extruded upper molding part 5A integral with and extending between the side and corner molding parts. Each of the molding parts 5A, 5B and 5C includes an exterior wing 52 and a connecting portion 51. The exterior wing 52 has an inward wing portion 57 and an outward wing portion 58. The thickness Ta of the inward wing portion 57 (shown in FIG. 14) and the thickness Tb of the inward wing portion 57 (shown in FIG. 15) vary with the difference of height of the windshield 11 and the body panels 12, 13. The connecting portion 51 of the molding parts 5A, 5B and 5C is inserted into the space between the windshield 11 and the body panels 12 and 13 so as to cover the space decoratively. As shown in FIGS. 13 and 14, the connecting portion 51 of the side molding part 5C includes a foot 55 extending inwardly along the lower end thereof, and a flexible lip 56 extending outwardly along the central portion thereof. A water drain channel 59 having a rectangular cross section is formed on the interior side of the inward wing portion 57 of the molding 5. The side molding part 5C is attached to the side edge of the windshield 11 by means of the interior side of the exterior wing 52 and the foot 55. A fastener 62 is stuck to the slanted walls 12a, 13a of the body panels 12, 13 with a double adhesive tape 61. A projection 56a of the flexible lip 56 engages with a projection of the fastener 62, so that the outward wing portion 58 engages with the body panel flexibly. As shown in FIGS. 13 and 15, the thickness Tb of the inward wing portion 57 is small at the upper molding part 5A compared with that at the side molding part 5C. The structure of the upper molding part 5A is substantially the same as that of the side molding 5C except for the inward wing portion 57, which does not have any large-thickness part. As shown in FIG. 13, thickness and width of the inward wing portion 57 are gradually increased from the corner molding part 5B toward the side molding part 5C. The drain channel 59 formed on the large-thickness part of the inward wing portion 57 gradually becomes shallower from the side molding part 5C toward the corner molding part 5B and disappears finally. The molding 5 is first attached around the edge of the windshield 11, and is then mounted in the window opening of the vehicle body. Otherwise, the windshield 11 is attached in the window opening beforehand, and then the molding 5 is inserted in the space between the windshield 11 and the body panels 12, 13 with the connecting portion 51 sandwiched in the space. The molding 5 includes a reinforcing core material 54 embedded therein, and a decorative tape 65 stuck on the inward wing portion 57. In FIGS. 13 to 15, reference numeral 66 stands for a adhesive for fastening the windshield 11 and the molding 5 to the vehicle body panels 12, 13, and 67 represents a dam rubber for preventing flow of the adhesive 66. The water pushed by a non-illustrated wiper toward the opposite sides of the windshield is guided along the drain channel 59 formed on the large-thickness portion of the inward wing portion 57. Therefore the water is prevented from dispersing onto the side windows of the vehicle, thereby keeping a good field of view from the driver's position. Embodiment 4: FIG. 16 is a partial cross sectional view showing a corner molding part 7B of a molding 7. The molding 7 comprises a pair of extruded side molding parts 7C, a pair of extruded corner molding parts 7B, and an extruded upper molding part 7A integral and extending between the side and corner molding parts. Each of the side, corner and upper molding parts includes an exterior wing and a connecting portion 76. The exterior wing has an outward wing portion 77 for covering the periphery of the vehicle body panel, and an inward wing portion 75 for covering the edge of the windshield. The outward wing portion 77 and the inward wing portion 75 are equally thick at the upper molding part 7A. However the inward wing portion 75 changes its shape gradually. Specifically, the inward wing portion 75 bulges to extend exteriorly at each of side molding parts 7C. As shown in FIG. 20, the inward wing portion 75 bulges exteriorly as if it rotates at a radius OP . The edge of the inward wing portion 75 is contoured as shown by P, P 1 , P 2 , P 3 , P 4 in FIG. 20. A water drain channel 78 is formed on the large-thickness portion of the inward wing portion 75 at the side molding part 7C. The shape of the connecting portion 76 is substantially the same at the molding parts 7A, 7C. The connecting portion 76 has a foot 79 extending inwardly along the lower end thereof, and a flexible lip 71 extending outwardly along the lower end thereof. When the molding 7 is inserted into the space between the window opening and the windshield 11, the windshield 11 is sandwiched by the interior side of the exterior wing and the foot 79 of the connecting portion 76, so that the windshield 11 is mounted to the vehicle body via the molding 7. Under this condition, the flexible lip 71 is flexibly contacted to the slanted portions 12a, 13a of the roof panel 12 and the pillar panel 13, and the outward wing portion 77 is flexibly contacted to the roof panel 12 and the pillar panel 13. In FIG. 16 to FIG. 19, reference numeral 82 stands for a reinforcement core material embedded in the connecting portion 76, and 83 represents a dam rubber for preventing flow of the adhesive 73. A molding machine for producing the molding 7 will be described with reference to FIG. 21 to FIG. 23. The molding machine comprises a basic die 102 having an opening 101, a first movable die 104 which rotates centrally of a fulcrum 103 so as to change the area of the opening 101 to form the inward wing portion 75, and a second movable die 105 which advances and retracts into and from the opening 101 so as to form the water drain channel 78 on the inner wall portion of the side molding part 7C only. The first movable die 104 is in the shape of sector, being positioned over the opening 101 for forming the inward wing portion 75, and being rotatable centrally of the fulcrum 103. The first movable die 104 is operated by a non-illustrated motor which is located behind the basic die 102. The second movable die 105 is guided by a pair of guides 106 so as to be rectilinearly movable. The rotary motion of a motor 107 is converted into the rectilinear motion by a converter 108. Therefore the second movable die 105 moves rectilinearly, advancing and retracting into and from the opening 101 of the basic die 102. As shown in FIG. 21, the first movable die 104 is at one of its predetermined positions, minimizing the area of the opening 101 for forming the exterior wing of the molding. The second movable die 105 remains away from the opening 101. Under this condition, the upper molding part 7A is produced. The first movable die 104 is moved gradually, and the second movable die 105 is also advanced gradually into the opening 101. Then the thickness of the inward wing portion 75 is increased gradually. At the same time, the drain channel 78 is deepened and widened gradually on the inward wing portion 75. Thus the corner molding part 7B will be formed as shown in FIG. 22. When the first movable die 104 reaches the other predetermined position, and when the second movable die 105 reaches its destination in the opening 101, production of the side molding part 7C will be started. The foregoing operations of the first and second movable dies are repeated to extrude the upper, corner and side molding parts 7A to 7C in the integral form. When the second movable die 105 has a sharply pointed tip, the water drain channel 78 will be also formed on the relatively thin corner molding part 7B. FIG.24 to FIG. 26 show a further molding according to a further embodiment of the invention. Only the portions different from those of the molding 7 will be described hereinafter. A molding 110 is attached to the roof panel 12 and pillar panels 13 by means of a fastener 112 stuck by an adhesive 111. Specifically, a dent 114 at the lower end of the connecting portion 113 engages with the fastener 112 so as to make the inward wing portion 115 contacted with the surface of the windshield 11. Then the molding 110 is attached around the edge of the windshield 11. Under this condition, the outward wing portion 117 of the molding 110 is in flexible contact with the body panels 12, 13 via the lip 112a of the fastener 112. It is needless to say the moldings according to the invention are applicable to installation of a rear window.

Claims: A method of producing an automobile windshield molding (2) for decorating along a periphery of a windshield (11) located in an opening of a vehicle body panel (12, 13), using an extruding apparatus including a plurality of dies, said automobile windshield molding having an exterior wing (21) extending, when installed, along said periphery of the windshield, the cross-sectional profile of which continuously varies in a longitudinal direction from a second molding section (2C) to a first molding section (2A) and which has a water drain channel (28) in and along the second molding section, said method comprising the steps of: forming an outer surface and an inner surface of the exterior wing by extruding through dies disposed to correspond with each of said surfaces, in that a first die (31, 104) is provided having an extruding edge shaped in accordance with the cross-sectional profile of the outer surface of the exterior wing, a second die (32, 102) is provided having extruding edge shaped in accordance with the cross-sectional profile of the inner surface of the exterior wing, the second die (32, 102) being guided in a relation to the first die (31, 104) and being moved relative thereto such that the space through which the molding passes as it is extruded may be varied such that the cross-sectional profile of the molding may be varied; a die (33, 105) for forming the inner surface of the water drain channel; gradually changing the position of said dies in a direction perpendicular to an extruding direction when moving from the forming of said second molding section to the first molding section; and forming an inner surface of the water drain channel by moving the die (33, 105) for forming the water drain channel with distance from the other dies so as to reduce the size of the water drain channel from the second molding section to the first molding section. A method of producing an automobile windshield molding (2) according to claim 1, wherein the die for forming the water drain channel moves so as to reduce the size of the water drain channel while the dies for forming the exterior wing are closing on each other. A method of producing an automobile windshield molding (2) according to claim 1, wherein the die moving step makes the size of the water drain channel (28) reduce in depth. A method of producing an automobile windshield molding (2) according to claim 1, wherein the die moving step makes the size of the water drain channel (28) reduce in depth and width at the same time. A method of producing an automobile windshield molding (2) according to claim 1, wherein the die moving step includes the step of moving the dies forming the water drain channel (28) and the exterior wing (21) in an interlocked timing with respect to each other. A method of producing an automobile windshield molding (2) according to claim 5, wherein said step of moving the dies includes the step of moving the die forming the water drain channel (28) at an earlier timing than the dies for forming the exterior wing (21). A method of producing an automobile windshield molding (2) according to claim 1, wherein the surface forming step includes the step of forming the outer and inner surfaces of the exterior wing (21) by the dies disposed at the same position in an extrusion direction. A method of producing an automobile windshield molding (2) according to claim 7, wherein the outer and inner surfaces of the exterior wing (21) are formed through a single extrusion opening constructed by the dies. A method of producing an automobile windshield molding (2) according to claim 8, wherein said second die (32, 102) is placed on the first die (31, 104). A method of producing an automobile windshield molding (2) according to claim 8, wherein the outer and inner surfaces of the exterior wing (21) are formed with shielding plates of the dies. A method of producing an automobile windshield molding (2) according to claim 7, wherein the inner surfaces of the water drain channel (28) are formed with the die disposed at the same position to the other dies in the extrusion direction. A method of producing an automobile windshield molding (2) according to claim 1, wherein said first and second molding sections (2A, 2C) are formed as upper and side molding sections corresponding to upper and side edges of the windshield (11). A method of producing an automobile windshield molding (2) according to claim 1, wherein the die moving step includes the step of extruding a connecting portion (22) adopted for insertion into a gap between the periphery of said windshield (11) and an inner edge of said window opening by the die for forming the inner surface of the exterior wing. A method of producing an automobile windshield molding (2) according to claim 1, wherein a cross-sectional profile of the second molding section (2C) is defined by extruding through the dies for forming the outer and inner surface of the exterior wing and inner surface of the water drain channel (28), and a cross-sectional profile of the first molding section (2A) is defined by extruding through the dies for forming the outer and inner surface of the exterior wing. An apparatus for producing an automobile windshield molding (2) for decorating along a periphery of a windshield (11) located in an opening of a vehicle body panel (12, 13), said automobile windshield molding having an exterior wing (21) extending, when installed, along said periphery of the windshield, the cross-sectional profile of which continuously varies in a longitudinal direction from a second molding section (2C) to a first molding section (2A) and which has a water drain channel (28) in and along the second molding section, said apparatus comprising: dies for forming an outer surface and an inner surface of the exterior wing and an inner surface of the water drain channel by extrusion, said dies comprising: a first die (31, 104) is provided having an extruding edge shaped in accordance with the cross-sectional profile of the outer surface of the exterior wing, a second die (32, 102) is provided having an extruding edge shaped in accordance with the cross-sectional profile of the inner surface of the exterior wing, the second die (32, 102) being guided in a relation to the first die (31, 104) and being moved relative thereto such that the space through which the molding passes as it is extruded may be varied such that the cross-sectional profile of the molding may be varied; and a die (33, 105) for forming the inner surface of the water drain channel; means for gradually changing the position of said dies in a direction perpendicular to an extruding direction when moving from the forming of said second molding section to the first molding section; means for moving the die (33, 103) for forming the water drain channel with distance from the other dies so as to reduce the size of the water drain channel from the second molding section to the first molding section while the dies for forming the exterior wing are closing on each other. An apparatus for producing an automobile windshield molding (2) according to claim 15, wherein the dies move so as to make the size of the water drain channel (28) reduce in depth. An apparatus for producing an automobile windshield molding (2) according to claim 15, wherein the dies move so as to make the size of the water drain channel (28) reduce in depth and width at the same time. An apparatus for producing an automobile windshield molding (2) according to claim 15, wherein the dies for forming the water drain channel (28) and the exterior wing (21) move in an interlocked timing with respect to each other. An apparatus for producing an automobile windshield molding (2) according to claim 18, wherein said dies for forming the water drain channel (28) move at an earlier timing than the dies for forming the exterior wing (21). An apparatus for producing an automobile windshield molding (2) according to claim 15, wherein the dies for forming the water drain channel are disposed at the same position in an extrusion direction in such a manner that the outer and inner surfaces of the exterior wing (21) are formed. An apparatus for producing an automobile windshield molding (2) according to claim 20, wherein the dies construct a single extrusion opening through which the outer and inner surfaces of the exterior wing (21) are formed. An apparatus for producing an automobile windshield molding (2) according to claim 21, wherein the dies have shielding plates with which the outer and inner surfaces of the exterior wing (21) are formed. An apparatus for producing an automobile windshield molding (2) according to claim 20, wherein the die is disposed at the same position to the other dies in the extrusion direction in such a manner that the inner surfaces of the water drain channel (28) are formed. An apparatus for producing an automobile windshield molding (2) according to claim 15, wherein the die for forming the inner surface of the exterior wing moves so as to extrude a connecting portion (22) adopted for insertion into a gap between the periphery of said windshield (11) and an inner edge of said window opening. An apparatus for producing an automobile windshield molding (2) according to claim 15, wherein the dies for forming the outer and inner surface of the exterior wing define in particular said water drain channel (28), a cross-sectional profile of the first molding section (2A) and the second molding section (2C) by extruding.

Inventors: HIRAI YOICHI, YADA YUKIHIKO, HIRAI, YOICHI, YADA, YUKIHIKO
Applicants: TOKAI KOGYO CO LTD, TOKAI KOGYO KABUSHIKI KAISHA
Application year: 1991
Main classification: B29C47
IPC codes: B60J10, B60J1, B29C47