A MASKING MEMBER

Abstract: A masking member consisting of an inserting part having a vessel form consisting of a bottom and a perpendicular wall which extends upwards from the circumference of said bottom, and a flange formed arround said inserting part, said masking member made of a thermoplastic foam, is presented in the present invention. When said masking member is used, said inserting part of said masking member is inserted into a hole of an article and said flange of said masking member covers the surroundings of said hole. Thus the inside of said hole and said surroundings of said hole are protected from a surface treatment and the removing of said masking member after said surface treatment from said hole may be very smooth without obstruction of the film of said surface treatment.

Description: The present invention relates to a masking member used to protect the inside and circumference of a hole such as a water outlet hole, a cable piercing hole and the like from a surface treatment such as coating, plating, phosphatizing, vacuum evaporation and the like. More particularly, the present invention relates to a new masking member consisting of an inserting part having a vessel form consisting of a bottom and a perpendicular wall which extends upwards from the circumference of said bottom, and a flange formed around said inserting part, said masking member made of a thermoplastic foam. In a case where a surface treatment is effected on the surface of an article, said surface of said article often has hole(s) whose inside must be protected from said surface treatment. Said hole(s) may be a water outlet hole, a cable piercing hole, and the like, and a grummet, a plug, a bolt and the like may be inserted into said hole(s). Hitherto, a masking member of the plug type has been used to protect said hole from a surface treatment. Said masking member may be inserted into a hole of an article to be protected before said surface treatment and, when said surface treatment is effected on the surface of an article, said hole of said masking member is not subjected to said surface treatment. After said surface treatment, said masking member may be removed from said hole of said article. Nevertheless, the resulting film of said surface treatment covers continuously the surface of said article and the surface of said masking member enough to obstruct the smooth removing of said masking member from said hole of said article. Further, in a case where said surface treatment is a coating and said masking member has a taper form, said coating may collect on the surroundings of said hole, namely on the surroundings of said masking member to form a thick part of said coating film on said surroundings of said hole. Said thick part may obstruct a grummet, plug, bolt and the like from fitting tightly to said hole. Accordingly, an object of the present invention is to save trouble when the masking member is removed from said hole(s) of an article, the inside of which is necessary to be protected from a surface treatment. According to this invention there is provided a masking member for use in protecting the inside of a hole from a surface treatment of the body surface in which the hole is formed, the masking member consisting of an inserting part having a vessel form consisting of a bottom and a wall which extends upwards from the circumference of said bottom, and a flange formed around said inserting part, said masking member being made of a thermoplastic foam. The invention also provides the use in protecting the inside of a hole from a surface treatment of the body surface in which the hole is formed of such a masking member. The invention also provides a method of protecting the inside of a hole from a surface treatment of the body surface in which the hole is formed by mounting into the hole a masking member consisting of an inserting part having a vessel form consisting of a bottom and a wall which extends upwards from the circumference of said bottom, and a flange formed around said inserting part, said masking member being made of a thermoplastic foam. The invention also provides a method of surface treatment of a body surface having a hole therein wherein there is inserted into the hole a masking member consisting of an inserting part having a vessel form consisting of a bottom and a wall which extends upwards from the circumference of said bottom, and a flange formed around said inserting part, said masking member being made of a thermoplastic foam, the surface treatment is performed and the masking member removed. The masking member of the invention may be easily removed from the hole of an article and a grummet, plug, bolt and the like may fit tightly to the hole of the article without looseness. Thus the methods of the invention may be easily performed. The masking member may be made of a thermoplastic foam such as polystyrene foam, polyethylene foam, polypropylene foam and the like and said masking member may be colored by (a) suitable color(s) if desired, for the purpose of selection of the specified masking member according to the hole into which it is to be inserted. A masking member made of polystyrene foam may be one of the most suitable masking members of the present invention. The invention will be better understood from the following description of exemplary embodiments. Figure 1 is a perspective view of the first embodiment of the present invention. Figure 2 is a partial side sectional view of the first embodiment of the present invention. Figure 3 is a partial side sectional view of the first embodiment of the present invention. Figure 4 is a partial side sectional view of the article including the hole into which a bolt has been inserted. Figure 5 is a perspective view of the second embodiment of the present invention. Figure 6 is a partial side sectional view of the second embodiment of the present invention. Figure 7 is a perspective view of the third embodiment of the present invention. Figure 8 is a partial side sectional view of the third embodiment of the present invention. Figure 9 is perspective view of the fourth embodiment of the present invention. Figure 10 is a partial side sectional view of the fourth embodiment of the present invention. Figure 11 is a perspective view of the fifth embodiment of the present invention. Figure 12 is a partial side sectional view of the fifth embodiment of the present invention. Figure 13 is a side sectional view of the sixth embodiment of the present invention. Figure 14 is a perspective view of the sixth embodiment of the present invention. Figure 15 is a side sectional view of the seventh embodiment of the present invention. Figure 16 is a side sectional view of the eighth embodiment of the present invention. Figure 17 is a side sectional view of the nineth embodiment of the present invention. Figure 18 is a perspective view of the tenth embodiment of the present invention. Figure 19 is a side sectional view of the tenth embodiment of the present invention. Figure 20 is a side sectional view of the eleventh embodiment of the present invention. Figure 21 is a perspective view of the twelfth embodiment of the present invention. Figure 22 is a perspective view of the thirteenth embodiment of the present invention. Figure 1 to Figure 4 relate to the first embodiment of the present invention. Refering now to said figures, a masking member (110) consists of an inserting part (111) having a vessel form consisting of a circular bottom (111A) and a wall (111B) which extends upwards from the circumference of said bottom (111A), and a flange (112) which is extended from the upper edge of said wall (111B), said masking member (110) made of a thermoplastic foam. Said inserting part (111) has a taper form decreasing in diameter from the base of said inserting part (111) to the top of said inserting part (111). When said masking member (110) is used, said masking member (110) protects the inside of a hole (311) of an article (310) by inserting said inserting part (111) into said hole (311) as shown in Fig. 2, and said flange (112) of said masking member (110) covers the surroundings (312) of said hole (311). After which, a surface treatment such as a coating is effected on the surface of said article (310) to form a film (313) of said surface treatment and the inside and surroundings of said hole (311) are not subjected to said surface treatment. After said surface treatment, said masking member may be removed from said hole (311) by hand, hook, and the like. Said masking member (110) can be also removed from said hole (311) by heating at a temperature higher than the softening point of said thermoplastic foam. When said masking member (110) is heated to a temperature higher than the softening point of the thermoplastic foam of said masking member, it may be softened and gases such as air, gas of a blowing agent, and the like in the cells of said thermoplastic foam may first expand and so said masking member may also expand and, then, when said gases leave the cells, said masking member (110) may shrink rapidly and remove itself naturally from said hole (311). After said masking member (110) is removed from said hole (311), said film (313) has not been formed inside and on said surrounding (312) of said hole (311) as shown in Fig.3 and a bolt (314) may be tightly inserted into said hole (311) as shown in Fig. 4, since there is no thick part of said film (313) of said surface treatment on said surroundings (312) of said hole (311). Further, said masking member (110) can be used for many holes having different diameters since said inserting part (111) of said masking member (110) has a taper form as before mentioned. Figure 5 and Figure 6 related to the second embodiment of the present invention. In this embodiment, a masking member (120) consists of an inserting part (121) having a vessel form consisting of a circular bottom (121A) and a wall (121B) which extends upwards from the circumference of said bottom (121A) and a flange (122) which is extended from the upper part of said wall (121B). Said inserting part (121) has a taper form decreasing in diameter from the base of said inserting part (121) to the top of said inserting part (121). Said masking member (120) is made of a thermoplastic foam. Said masking member (120) of this embodiment is used as same as the first embodiment and film (323) of the surface treatment such as coating may be cut by the upper edge of said inserting part (121) as shown in Figure 6, and therefore, said masking member (120) may be smoothly removed from the hole (321) of the article (320) without the obstruction of said film (323). Figure 7 and Figure 8 relate to the third embodiment of the present invention. In this embodiment, a masking member (130) comprises an inserting part (131) having a vessel form consisting of a circular bottom (131A) from which a grip (131C) projects and a wall (131B) which extends upwards from the circumference of said bottom (131A), a flange (132) which is extended from the upper edge of said wall (131B). Said inserting part (131) has a taper form decreasing in diameter from the base of said inserting part (131) to the top of said inserting part (131). Said masking member (130) is made of a thermoplastics foam. The masking member (130) of this embodiment is easily handled by holding said grip (131C) when said masking member (130) is inserted into the hole (331) of the article (330) or removed from the hole (331). Figure 9 and Figure 10 related to the fourth embodiment of the present invention. In this embodiment, a masking member (140) consists of a inserting part (141) having a vessel form consisting of a circular bottom (141A) from which a grip (141C) is risen and a wall (141B) which extends upwards from the circumference of said bottom (141) and a flange (142) which is extended from the upper part of said wall (141B). Said inserting part (141) has a taper form decreasing in diameter from the base of said inserting part (111) to the top of said inserting part (111). Said masking member (150) is made of a thermoplastic foam. Said masking member (140) of this embodiment is easily handled by holding said grip (141C) when the masking member (140) is inserted into the hole (341) of the article (340) or removed from the hole (341) as same as the third embodiment of the present invention. Further, the film (343) of the surface treatment such as coating may be cut by the upper edge of said inserting part (141) the same as the second embodiment as shown in Figure 10 so that said masking member (140) is easily removed from the hole (341) without the obstruction of said film (343). Figure 11 and Figure 12 relate to the fifth embodiment of the present invention. In this embodiment, a masking member (150) consists of an inserting part (151) having a vessel form consisting of a circular bottom (151A) and a wall (151B) which extends upwards from the circumference of said bottom (151A), and a flange (152) which is extended from the upper edge of said wall (151B), and has a perpendicular wall (152A) which extends upwards from the circumference of said flange (152). Said inserting part (111) has a taper form decreasing in diameter from the base of said inserting part (111) to the top of said inserting part (111). Said masking member (150) is made of thermoplastic foam. Said masking member (150) of this embodiment is used as same as the first, second, third and fourth embodiment, and in this embodiment the film (353) of the surface treatment such as coating may be cut by the edge of said perpendicular wall (151A) as shown in Figure 12, so that said masking member (150) is easily removed from the hole (351) of the article (350) without obstruction of said film (353). Figure 13 and Figure 14 relate to the sixth embodiment of the present invention. In this embodiment, a masking member (160) consists of an inserting part (161) having a vessel form consisting of a circular bottom (161A) from which a grip (161C) projects and a wall (161B) which extends upwards from the circumference of said bottom (161A), a lower flange (162) which is extended from the upper edge of said wall (161B), a perpendicular wall (163) which extends upwards from the circumference of said lower flange (162), and an upper flange (164) which is extended from the upper edge of said perpendicular wall (163). Plural ribs (165) and (166) are respectively formed on said bottom (161A) of said inserting part (161) and said lower flange (162) to reinforce them. Said inserting part (161) has a taper form decreasing in diameter from the base of said inserting part (161) to the top of said inserting part (161). Said masking member (160) is made of a thermoplastic foam. Said masking member (160) of this embodiment is easily handled by holding said grip (161C) when said masking member (160) is inserted into the hole of the article or removed from the hole the same as the third and the fourth embodiments and the film of the surface treatment may be more completely cut by said upper flange (164) so that said masking member (160) is more easily removed from the hole within the obstruction of the film. Figure 15 relates to the seventh embodiment of the present invention. In this embodiment, a masking member (170) consists of an inserting part (171) having a vessel form consisting of a circular bottom (171A) from which a grip (171C) projects and a wall (171B) which extends upwards from the circumference of said bottom (171A), a lower flange (172) which is extended from the upper edge of said perpendicular wall (171B), a lower perpendicular wall (173) which extends upwards from the circumference of said lower flange (172), an upper flange (174) which is extended from the upper edge of said perpendicular wall (173), and an upper perpendicular wall (175) which extends upwards from the circumference of said upper flange (174). Plural ribs are respectively formed on said bottom (171A) of said inserting part (171) and said lower flange (172) to reinforce them. Said inserting part (171) has a taper form decreasing in diameter from the base of said inserting part (171) to the top of said inserting part (171). Said masking member (170) is made of a thermoplastic foam. Said masking member (170) of this embodiment is easily handled by holding said grip (171C) when said masking member (170) is inserted into the hole of the article or removed from the hole the same as the third, the fourth and the sixth embodiments and the film of the surface treatment may be more completely cut by said upper perpendicular wall (175) with said lower flange (172), said lower perpendicular wall (173) and said upper flange (174) than in the case of the sixth embodiment of the present invention so that said masking member (170) is more easily removed from the hole without the obstruction of the film. Figure 16 relates to the eighth embodiment of the present invention. In this embodiment, a masking member (180) consists of an inserting part (181) having a vessel form consisting of a circular bottom (181A) from which a grip (181C) projects and a wall (181B), an inner perpendicular extends upwards from the circumference of said bottom (181A), a lower flange (182) which is extended from the upper edge of said wall (181B), an inner perpendicular wall (183) which extends upwards from the circumference of said lower flange (182), an upper flange (184) which is extended from the upper edge of said perpendicular wall (184), and an outer perpendicular wall (185) which extends downwards from the circumference of said upper flange (184). Plural ribs are respectively formed on said bottom (181A) of said inserting part (181) and said lower flange (182) to reinforce them. Said inserting part (181) has a taper form decreasing in diameter from the base of said inserting part (181) to the top of said inserting part (181). Said masking member (180) is made of a thermoplastic foam. Said masking member (180) of this embodiment is easily handled by holding said grip (181C) when said masking member (180) is inserted into the hole of the article or removed from the hole as same as the third, the fourth, the sixth and the seventh embodiments and the film of the surface treatment may be more completely cut by said upper flange (184) and said outer perpendicular wall (185) with said lower flange (182) and said inner perpendicular wall (183) than in the case of the sixth embodiment of the present invention so that said masking member (180) is more easily removed from the hole without the obstruction of the film. Figure 17 relates to the ninth embodiment of the present invention. In this embodiment a masking member (190) consists of an inserting part (191) having a vessel form consisting of a circular bottom (191A) and a wall (191B) which extends upwards from the circumference of said bottom (191A) and on which plural perpendicular ribs (191D) are formed, and a flange (192) which is extended from the upper edge of said wall (191B). Said inserting part (191) has a taper form decreasing in diameter from the base of said inserting part (191) to the top of said inserting part (191). Said masking member is made of a thermoplastic foam. In this embodiment, said perpendicular ribs (191D) reinforce said wall (191B) to prevent crushing of said inserting part (191) of said masking member (190) when said masking member (190) is inserted into the hole of the article and said masking member (190) is firmly held in the hole since said perpendicular ribs (191D) of said masking member (190) tightly contact to the inner wall of said hole. Figure 18 and Figure 19 relate to the tenth embodiment of present invention. In this embodiment, a masking member (200) consists of an inserting part (201) having a vessel form consisting of a circular bottom (201A) from which a grip (201C) projects and a wall (201B) which a extends upwards from the circumference of said bottom (201A) and on which plural perpendicular ribs (201D) are formed, and a flange (202) which is extended from the upper edge of said wall (201B). Said inserting part (201) has a taper form decreasing in diameter from the base of said inserting part (201) to the top of said inserting part (201). Said masking member is made of a thermoplastic foam. In this embodiment, said perpendicular ribs (201D) reinforce said wall (201B) to prevent crushing of said inserting part (201) of said masking member (200) when said masking member (200) is inserted into the hole of the article and said masking member (200) is firmly held in the hole since said perpendicular ribs (201D) of said masking member (200) tightly contact to the inner wall of said hole. Further, said masking member (200) of this embodiment is easily handled by holding said grip (201C) when said masking member (200) is inserted into the hole. Figure 20 relates to the eleventh embodiment of the present invention. In this embodiment, a masking member (210) consists of an inserting part (211) having a vessel form consisting of a circular bottom (211A) from which a grip (211C) projects and a wall (211B) which extends upwards from the circumference of said bottom (211A) and on which plural perpendicular ribs (211D) are formed, a lower flange (212) which is extended from the upper edge of said wall (211B), a perpendicular wall (213) which extends upwards from the circumference of said flange (212), and an upper flange (214) which is extended from the upper edge of said perpendicular wall (213). Said inserting part (211) has a taper form decreasing in diameter from the base of said inserting part (211) to the top of said inserting part (211). Said masking member is made of a thermoplastic foam. In this embodiment, said perpendicular ribs (211D) reinforce said wall (211B) to prevent crushing of said inserting part (211) of said masking member (210) when said masking member (210) is inserted into the hole of the article and said masking member (210) is firmly held in the hole since said perpendicular ribs (211D) of said masking member (210) tightly contact to the inner wall of said hole. Further, said masking member (210) of this embodiment is easily handled by holding said grip (211C) when said masking member (210) is inserted into the hole as same as the eleventh embodiment and the film of the surface treatment may be more completely cut by said upper flange (214) with said lower flange (212) and said perpendicular wall (213) than in the case of the nineth and the tenth embodiments of the present invention so that said masking member (210) is more easily removed from the hole without the obstruction of the film. Figure 21 relates to the twelfth embodiment of the present invention. In this embodiment, a masking member (220) consists of an inserting part (221) having vessel form consisting of a cross-shaped bottom (221A) and a perpendicular wall (221B) which extends upwards from the perimeter of said bottom (221A), a flange (222) which is extended from the upper edge of said wall (221B), and a perpendicular wall (223) which extends upwards from the circumference of said flange (222). Said masking member (220) is made of thermoplastic foam. In this embodiment, said inserting part (221) is reinforced by said cross-shaped bottom (221A) to prevent crushing of said inserting part (221) of said masking member when said masking member (220) is inserted into the hole of the article, and further said masking member (220) is supported in the inner wall of said hole by only partial contacts at the tips (221C) of said inserting part (221) so that removing of said masking member (220) from the hole may be very easy. Figure 22 relates to the thirteenth embodiment of the present invention. In this embodiment, a masking member (230) consists of an inserting part (231) having vessel form consisting of a cross-shaped bottom (231A) and a perpendicular wall (231B) which extends upwards from the perimeter of said bottom (231A), a lower flange (232) which is extended from the upper edge of said wall (231B), a perpendicular wall (233) which extends upwards from the circumference of said lower flange (232), and an upper flange (234) which is extended from the upper edge of said wall (233). Said masking member (230) is made of thermoplastic foam. In this embodiment, said inserting part (231) is reinforced by said cross-shaped bottom (231A) to prevent crushing of said inserting part (231) of said masking member when said masking member (230) is inserted into the hole of the article, and further said masking member (230) is supported in the inner wall of said hole by only partially contacts at the tips (231C) of said inserting part (231) so that removing of said masking member (230) from the hole may be very easy. The film of the surface treatment may be more completely cut by said upper flange (234) with said lower flange (232) and said perpendicular wall (233) than in the case of the twelfth embodiment of the present invention.

Claims: A masking member for use in protecting the inside of a hole from a surface treatment of the body surface in which the hole is formed, the masking member consisting of an inserting part having a vessel form consisting of a bottom and a wall which extends upwards from the circumference of said bottom, and a flange formed around said inserting part, said masking member being made of a thermoplastic foam. A masking member of claim 1, wherein said flange extends from the upper edge of said inserting part. A masking member of claim 2, wherein a perpendicular wall extends upwards from the circumference of said flange. A masking member of claim 3, wherein said flange is a lower flange and an upper flange extends from the upper edge of said perpendicular wall. A masking member of claim 4, wherein the first said wall is a lower wall and an upper perpendicular wall extends upwards from the circumference of said upper flange. A masking member of claim 4, wherein the first said wall is an inner wall and an outer perpendicular wall extends downwards from the circumference of said upper flange. A masking member according to any preceding claim wherein said flange extends from the upper part of said perpendicular wall. A masking member according to any preceding claim wherein a grip projects from said inserting part. A masking member according to any preceding claim wherein plural perpendicular ribs are formed on said wall of said inserting part. A masking member according to any preceding claim wherein said bottom of said inserting part is cross shaped. The use in protecting the inside of a hole from a surface treatment of the body surface in which the hole is formed of a masking member according to any preceding claim. A method of protecting the inside of a hole from a surface treatment of the body surface in which the hole is formed by mounting into the hole a masking member consisting of an inserting part having a vessel form consisting of a bottom and a wall which extends upwards from the circumference of said bottom, and a flange formed around said inserting part, said masking member being made of a thermoplastic foam. A method of surface treatment of a body surface having a hole therein wherein there is inserted into the hole a masking member consisting of an inserting part having a vessel form consisting of a bottom and a wall which extends upwards from the circumference of said bottom, and a flange formed around said inserting part, said masking member being made of a thermoplastic foam, the surface treatment is performed and the masking member is removed. A method according to claim 12 or 13 wherein said masking member is a masking member according to any one of claims 2 to 10.

Inventors: HORIKI, SEINOSUKE NAGOYA OILCHEMICAL CO. LTD., ITO, KUNINORI NAGOYA OILCHEMICAL CO. LTD., MAKINO, REIJI NAGOYA OILCHEMICAL CO. LTD.
Applicants: NAGOYA OILCHEMICAL CO., LTD.
Application year: 1987
Main classification: B05C21
IPC codes: B05B15