Automobile windshield molding and the method of producing the same

Abstract: A windshield molding 2 is installed in the space between a windshield 11 and a periphery of a window opening of a vehicle body panel. The windshield molding 2 comprises a pair of extruded side molding parts 2C, a pair of extruded corner molding parts 2B, and an extruded upper molding part 2A integral with and extending between the side and corner molding parts. Each of side molding parts 2B associated with each side edge of the windshield is larger in thickness compared to the upper and corner molding parts, where a water drain channel 28 is formed.

Description: This invention relates to an automobile windshield molding for a motor vehicle body to seal the space between a windshield and a periphery of a window opening of a vehicle body panel. An automobile windshield molding is usually attached around an edge of a windshield 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 disclosed in Japanese Utility Model/Laid-Open Publication JP-U-42617/80 (or JP-Y2-54416/82) and Japanese Utility Model Laid-Open Publication. JP-U-9811/89. These citations disclose windshield moldings which have water drain channels for receiving water flowing on the surface of the windshield. Japanese Patent Laid-Open Publication JP-A-289427/87 (or JP-A-289427/88?) and Japanese Utility Model Laid-Open Publication. JP-U-28374/89 describe windshield moldings in which size of water drain channels is varied in the longitudinal direction of the molding. In the latter two cases, the molding is divided into a portion without a water drain channel, a portion with a water drain channel of one size, and a portion with a water drain channel of a different size. These molding portions are separately produced, and are then arranged to be coupled as one unit by an injection molder. When they are coupled, there may be lines between joined areas of the molding parts, which would deteriorate decorativeness of the molding. To overcome the foregoing inconvenience, a variety of proposals have been made in Japanese Patent Laid-Open Publications JP-A-8019/88, JP-A-269612/89, JP-A-195032/89, JP-A-291721/88, JP-A-244 820/89, JP-A-269611/89, JP-A-269613/89, and JP-A-283018/87, and Japanese Utility Model Laid-Open Publication JP-U-128411/89. With Japanese Patent Laid-Open Publications JP-A-8019/88 and 283018/87, the molding has a specified constant cross-sectional shape in the longitudinal direction. The molding is deformed to serve an article at a portion where a water drain channel is to be formed. In the citation JP-A-269612/89, the molding has a specified constant cross-sectional shape in the longitudinal direction. The molding has a leg portion cut at one side, which are used to receive a windshield and to obtain a space for a water drain channel. In JP-A-195032/89, the molding has a specified constant cross-sectional shape, and a portion for a water drain channel is removed at portions where no water drain channel is necessary. In JP-A-291721/88 and JP-A-244820/89, the molding has two extending portions to form a pair of grooves, and one of the extending portions is cut off at a portion where no water drain channel is necessary. The citation JP-U-128411/89 discloses a molding which is a modification of the moldings of the two last mentioned citations. In this citation, a corner joint is used to connect upper and side molding parts. With JP-A-269611/89 and JP-A-269613/89, an upper decorative portion of the molding has a specified configuration, but the shape of a portion for receiving the windshield is changed. In JP-A-269613/89, the molding has a specified cross-sectional shape longitudinally, and the portion for receiving the windshield is changed in position by cutting to obtain a space for a water drain channel. The foregoing moldings have drawbacks as described hereinafter. The moldings of JP-A-8019/88 and JP-A-269612/89 have grooves for water drain channel, which are somewhat insufficient to guide water. In JP-A-195032/89, the molding has a sharp edge on its decorative portion. Such sharp edge should be removed later. The depth of the groove in the side molding part cannot be changed serially. With JP-A-291721/88 and JP-A-244820/89, the depth of the grooves of the molding cannot be changed serially. The molding is difficult to attach in the window opening of the automobile since a portion of the molding is cut off to serve as a water drain channel. With JP-A-244820/89, a die should be modified to make a molding. With the citations JP-A-269611/89, JP-A-269913/89, and JP-A-283018/1987, the depth of the grooves can be serially changed. However, at the upper molding part where no water drain channel is formed, portions of the molding in contact with the surface of the windshield should be housed inside the decorative portion. Therefore, the decorative portion should be made large, which would adversely affect the external appearance of the upper molding, and reduce the field of view from the driver's position. Such large upper molding part might be contrary to a demand for a flush surface between the windshield and the vehicle body panel. At the corner molding part, the molding might be wrinkled since the thin decorative portion is curved abruptly. In the postpublished earlier patent applications no 91104157.2 (EP-A-0 478 878), no. 91308152.7 (EP-A-0 476 891) and EP 93 201 949.0 (EP-A-0 572 100) automobile windshield moldings are described having an integral water drainage channel. From JP-A-1-269613/89 an automobile windshield molding is known which is provided with a water drainage channel extending in and along said inward wing portion and said sub-inward wing portion and opening inwardly at the side molding part. A protruded part of a leg extension is discontinued or recontinued to make the water drainage channel. A main part of the molding is sometimes glued to an elongated portion of the leg extension and sometimes glued to a lip forming said-subinward wing portion. However, this molding lacks mechanical stability and cannot therefore be used for each mounting situation. FR-A-2 579 927 discloses another molding for filling the space between the door and the periphery of a door opening of a vehicle body panel. This molding, however, neither shows a water drainage channel nor is it provided with the necessary mechanical stability. It is an object of this invention to provide an automobile windshield molding, in which a water drain channel is formed along the vehicle body side panel, and which is mechanically stable and comparably rigid. This object is solved by an automobile windshield molding comprising the features listed in claim 1. Advantageous embodiments are defined by the features of the subclaims. According to the invention, there is provided an automobile windshield molding for sealing the space between a windshield and a periphery of a window opening of a vehicle body panel, said molding comprising an extruded side molding part, an extruded upper molding part and an extruded corner molding part integral with and extending from said side molding part, said side, corner and upper molding parts comprising an exterior wing adapted to cover the space on the exterior side of the vehicle, said exterior wing of said side molding part including an inward wing portion having a uniform exterior contour appearance from said side molding part to said corner and upper molding parts, a sub-inward wing portion having an interior surface at said side molding part, a water drainage channel extending in and along said inward wing portion and said sub-inward wing portion and opening inwardly at the side molding part, said interior surface of the sub-inward wing portion of the exterior wing continues in succession to the interior surface of said inward wing portion at said corner molding part, said inward wing portion and said sub-inward wing portion close and merge with each other at a specified given point of said molding in the region of transition between the corner molding part and the side molding part such that said water drainage channel is gradually reduced in size until said water drainage channel is removed (Molding of the type disclosed in JP-A-269 613/89, characterized by the following features: the inward wing portion and the sub-inward wing portion are extruded on or secured to a frame extending in the direction of the vehicle body panel, said extruded side molding part, said extruded corner molding part and said extruded upper molding part are extruded integrally as one unit. In the following description, the present invention is described in more detail with respect to preferred em bodiments with reference to the accompanying drawings in which: FIG. 1 is a front perspective view of a vehicle body having a windshield molding; FIG. 2 is a front elevational view of an injection molding machine for making at least the water drainage channel of a molding including a water drainage channel like that of the molding according to the invention; FIG. 3 shows how the molding machine according to FIG. 2 operates; FIG. 4 is a perspective view of a molding according to the invention; FIG. 5 is a cross-sectional view showing an upper portion of a side molding part of FIG. 4; FIG. 6 is a cross-sectional view showing a central portion of the side molding part of FIG. 4; FIG. 7 is a perspective view showing a molding according to another embodiment; FIG. 8 is a cross-sectional view showing an upper molding part of FIG. 7; FIG. 9 is a cross-sectional view showing an upper portion of a side molding part of FIG. 7; and FIG. 10 is a cross-sectional view showing a lower portion of the side molding part of FIG. 7. An automobile windshield molding according to a first embodiment of the invention is shown in FIGS. 1 to 6. As shown in FIG. 1, a molding 2 is installed to seal the space between a windshield 11 and a periphery of a window opening of a vehicle body panel. The molding 2 is a long plastic 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 2B. All of these molding parts 2A to 2C are extruded as one unit. Each of the side, corner and upper molding parts 2A to 2C comprises an exterior wing 141 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 141 includes an inward wing portion 141a for covering the peripheral edge of the windshield 11 and an outward wing portion 141b for covering the periphery of the vehicle body panels 12, 13. The outward wing portion 141b is a lip-shaped member having a uniform thickness in its longitudinal direction. The inward wing portion 141a is a lip-shaped member, being uniformly thick on the upper molding part 2A, but being thickened gradually from the corner molding part 2B to the side molding part 2C. Specifically, the inward wing portion 141a is thickest at the central portion of the side molding part 2C. Then the inward wing portion 141a is made gradually thin toward the end of the side molding part 2C. The molding 2 can be installed in the window opening of the vehicle after the windshield 11 has been attached thereto. Otherwise, the molding can be inserted into the space between the window opening and the windshield 11 attached therein. A molding machine for producing a molding 2 will be described with reference to FIGS. 2 and 3. This molding 2 has a water drain channel like the molding according to the invention. Nevertheless, the fabrication method described in this connection is not part of the present invention. A molding machine 3 comprises three dies having openings through which the plastic material is extruded. These dies are first, second and third dies 31, 32, 33 positioned in parallel to the direction for extruding the plastic material, i.e. in the direction perpendicular to the plane of FIG. 2 and 3. The first die 31 is stationary, having an opening 34 shaped according to the cross-sectional shape of the molding 2. Specifically, the upper portion of the opening 34 corresponds to the cross-sectional shape of the exterior wing 21, and the lower portion of the opening 34 substantially corresponds to the cross-sectional shape of the connecting portion 22, foot 24 and elastic lip 25. The opening 34 has portions 341 and 343 corresponding to the shape of the upper side of the exterior wing 21, and a portion 345 corresponding to the shape of the sub-inward wing portion 21c. The lower edge of the portion 341 together with the shield 342 corresponds to the shape of the lower part of the outward wing portion 21b. The lower section of the portions 343 and 345 substantially correspond to the cross-sectional shape of the inward wing portion 21a and the sub-inward wing portion 21c having the largest area corresponding to the thickness before the water drain channel 28 is formed. The second and third dies 32, 33 are rectangular plates, which are respectively supported by a pair of guides 32a and a pair of guides 33a to be movable in parallel to the front side of the first die 31. The second die 32 has an opening 35 which corresponds to the cross-sectional shape of the connecting portion 22, foot 24 and the flexible lip 25. The second die 32 is placed on the first die 31 so that the openings 34, 35 of the first and second dies 31, 33 are in the shape of the molding 2. The second die 32 has at its lower portion an operation lever 32d, which is connected to a motor 32c via a converter 32b for converting rotary motion of the motor 32c into rectilinear motion. When driven by the motor 32c, the second die 32 reciprocates between the positions for forming the upper and lower molding portions shown in FIGS. 2 and 3, respectively. The third die 33 is a thin rectangular plate having a tip 331 pointed with an acute angle, reciprocating in the direction perpendicular to the second die 32. The third die 33 is connected to a motor 33c via an operation lever 33d and a converter 33b for converting the rotary motion to the rectilinear motion. The third die 33 is guided into and out of the opening 34 of the first die 31 so that the pointed tip 331 advances into the areas 343 and 345 to form the water drain channel 28 between the inward wing portion 21a and the sub-inward wing portion 21c of the molding 2. The third die 33 reciprocates according to the movement of the second die 32. 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. 3. 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 part 2C. The plastic material is extruded through the openings 34 and 35 together with a metallic foil strip 23 inserted in the upper central portion of the opening 35. In this case, the second die 32 is somewhat raised in the direction shown by an arrow Y, and the third die 33 is somewhat retracted in the direction shown by an arrow V. The plastic material is extruded to a preset extent under this condition. Then the second die 32 is lowered in the direction X. The portions 343, 345 of the opening 34 of the first die 31 are gradually widened to increase the space of the interior wing portion 21a and the sub-inward wing portion 21c and to form a groove. Then sub-inward wing portion 21c will be formed under the groove. The other portions of the side molding part 2C are being shaped without any change. The third die 33 is advanced in the direction W as the space between the inward wing portion 21a and the sub-inward wing portion 21c becomes larger to form the groove therein. Thus the third die 33 forms the groove as the water drain channel 28 on the thickened part of the inward wing portion 21b. Since the third die 33 is moved in synchronization with the moving speed of the second die 32, the depth and the width of the opening of the drain channel 28 are increased but the thicknesses of the inward wing portion 21a and the lower part 21b the same in the extruded molding. Under the condition shown in FIG. 3, the distance between the inward wing portion 21a and the sub-inward wing portion 21c is largest, and the water drain channel 28 is the widest and deepest to the preset length of the side molding part 2C. When the side molding part 2C is extruded to the specified length and a corner molding part 2B is to be formed, the second die 32 is raised again in the direction Y and the third die 33 is retracted to the direction V. Then, the portions 343, 345 of the opening 34 of the first die 31 are reduced in size, thereby reducing the distance between the inward wing portion 21a and the sub-inward wing portion 21c and reducing the size of the water drain channel 28. Under this condition, the sub-inward wing portion 21c remains as thick as the inward wing portion 21a. The other portions of the side molding part remain unchanged. When the third die 33 is retracted completely from the portions 343, 345 of the opening 34, the second die 32 is moved in the direction Y until the top of the second die 32 is flush with the edge 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 distance between the inward wing portion 21a and the sub-inward wing portion 21c is gradually reduced. When the portions 21a and 21c merge, the water drain channel 28 disappears. Thus the corner molding part 2B is extruded. The top of the shield 342 of the first die 31 and the edge of the opening 341 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 specified, the motor 32c is driven again to produce the corner molding part 2C. Thus the molding 2 is produced in the shape of a strip. FIG. 4 to FIG. 6 show a molding according to a first embodiment of the invention. A molding 140 comprises a metal frame 142 and a plastic molding member 141 extruded along the metal frame 142. The metal frame 142 is bent according to a space between the window opening of the vehicle and the windshield 11, being attached to the body panels 12, 13 along the window opening by fasteners such as clips and bolts. The metal frame 142 has a uniform cross-sectional shape in its longitudinal direction. The metal frame 142 confronts with the side edge of the windshield with some space therebetween at the side molding part according to the difference of height between the vehicle body panel and the upper surface of the windshield 11. The molding member 141 covers the peripheral edge of the windshield 11, including a portion 141a and a portion 141b. The portion 141a extends over the edge of the windshield 11, and the portion 141b covers the edge of the body panels 12, 13. At the upper molding part 140A, the portion 141a is in close contact with the surface of the windshield 11. At the side molding part 140C, the portion 141a and the metal frame 142 are away from the windshield 11. A water drain channel 148 is formed in the space between the portion 141a and sub-portion 141c as the distance between these portions 141a, 141c becomes larger. The sub-portion 141c is in contact with the windshield 11 at the side molding part 140C. The molding member 141 is thickest at the center of the side molding part 140C, being reduced in thickness toward the corner molding part 140B. The water drain channel 148 varies its width and depth depending upon the molding member 141, disappearing at the corner molding part 140B where the portion 141a and sub-portion 141c merge. The portion 141a and the sub-portion 141c have a uniform thickness along the water drain channel 148. The molding 140 of this embodiment is as effective as those of the foregoing embodiments. FIGS. 7 to 10 show a molding 190 according to a seventh embodiment. The molding 190 comprises a pair of extruded side molding parts 190C and an extruded upper molding part 190A being integral with and extending between the side molding parts 190C. Each molding part includes a metal frame 192 and a molding member 191 extruded along the metal frame 192. The molding member 191 has a portion 191a for covering the edge of the windshield 11. At the upper molding part 190A, the portion 191a is in contact with the surface of the windshield 11. The metal frame 192 has a uniform shape throughout the molding parts 190A to 190C. The frame 192 is arranged to be somewhat apart from the windshield 11 at the side molding part 190C according to the difference of height between the upper surface of the windshield 11 and the body panels 12, 13. At the majority of the side molding part 190C, the distance between the portion 191a and the sub-portion 191c gradually becomes larger so that a water drain channel 198 is formed therein, as shown in FIGS. 9 and 10. Specifically, the water drain channel 198 is defined between the portion 191a and sub-portion 191c. The thickness of the portion 191a and the sub-portion 191c remain the same along the water drain channel 198. The size of the water drain channel 198 depends upon the varying distance of the portion 191a and the sub-portion 191c. It is needless to say the moldings according to the invention are applicable to installation of a rear window.

Claims: An automobile windshield molding for sealing the space between a windshield and a periphery of a window opening of a vehicle body panel (12, 13), said molding comprising an extruded side molding part (2C), an extruded upper molding part (2A) and an extruded corner molding part (2B) integral with and extending from said side molding part (2C), said side, corner and upper molding parts (2C, 2B, 2A) comprising an exterior wing (141) adapted to cover the space on the exterior side of the vehicle, said exterior wing (141) of said side molding part (2C) including: an inward wing portion (141a) having a uniform exterior contour appearance from said side molding part (2C) to said corner and upper molding parts (2B, 2A) a sub-inward wing portion (141c) having an interior surface at said side molding part (2C), a water drainage channel (148, 198) extending in and along said inward wing portion (141a) and said sub-inward wing portion (141c) and opening inwardly at the side molding part (2C); said interior surface of the sub-inward wing portion (141c) of the exterior wing continues in succession to the interior surface of said inward wing portion (141a) at said corner molding part (2B), said inward wing portion (141a) and said sub-inward wing portion (141c) close and merge with each other at a specified given point of said molding in the region of transition between the corner molding part and the side molding part such that said water drainage channel (148, 198) is gradually reduced in size until said water drainage channel (148, 198) is removed; characterized by the following features: the inward wing portion (141a) and the sub-inward wing portion are extruded on or secured to a frame (142, 192) extending in the direction of the vehicle body panel (12, 13); said extruded side molding part (2C), said extruded corner molding part (2B) and said extruded upper molding part are extruded integrally as one unit. An automobile windshield molding according to claim 1, wherein the frame (192) is bent. An automobile windshield molding according to one of claims 1 or 2, wherein at the other end of the frame (142) a portion (141b) is extruded on or secured to the frame (142) to sealingly cover the edge of the vehicle body panels (12, 13). An automobile windshield molding according to one of claims 1 to 3, wherein the thickness of the merging body is gradually thinned within said corner molding part (2B). An automobile windshield molding according to one of claims 1 to 4, wherein said corner molding part (2B) extends integrally to an extruded upper molding part (2A). An automobile windshield molding according to claim 5, wherein said thickness of the upper molding part (2A) is less than that of the corner molding part (2B). An automobile windshield molding according to one of claims 1 to 6, wherein said water drainage channel (148, 198) varies in width of the opening in the corner molding part (2B). An automobile windshield molding according to claim 7, wherein said water drainage channel (148, 198) varies in width of the opening corresponding to a distance between the exterior surface of the inward wing portion (141a) and the interior surface of the sub-inward wing portion (141c). An automobile windshield molding according to one of claims 1 to 8, wherein said water drainage channel (148, 198) varies in the depth of the opening in the corner molding part (2B). An automobile windshield molding according to one of claims 1 to 9, wherein said water drainage channel (148, 198) varies in width of the opening and depth in the corner molding part (2B).

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