AU638445B2

AU638445B2 - Masking member

Info

Publication number: AU638445B2
Application number: AU49181/90A
Authority: AU
Inventors: Seinosuke Horiki; Reiji Makino
Original assignee: Nagoya Oil Chemical Co Ltd
Current assignee: Nagoya Oil Chemical Co Ltd
Priority date: 1989-02-10
Filing date: 1990-02-06
Publication date: 1993-07-01
Anticipated expiration: 2010-02-06
Also published as: CA2009535A1; EP0384619A1; AU4918190A; JPH02108764U

Description

638445 S F Ref: 120280 FORM COMMONWEALTH OF AUSTRALIA PATENTS ACT 1952 COMPLETE SPECIFICATION

(ORIGINAL)

FOR OFFICE USE: Class Int Class

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S S 0 Complete Specification Lodged: Accepted: Published: Priority: Related Art: Name and Address of Applicant: Nagoya Oilchemical 213-5 Honowari Minamishibata-cho, Aichi

JAPAN

Co., Ltd.

Tokai

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55* Address for Service: Spruson Ferguson, Patent Attorneys Level 33 St Martins Tower, 31 Market Street Sydney, New South Wales, 2000, Australia

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Complete Specification for the invention entitled: Masking Member The following statement is a full description of this invention, including the best method of performing it known to me/us 5845/5 MASKING MEMBER ABSTRACT OF THE DISCLOSURE A masking member produced by the molding of a sheet having a shape corresponding with a part of a surface of an article to be protected from a surface treatment, wherein said masking member has projection(s) which is(are) inserted into hole(s) on (an) indention(s) of said part is provided in the present invention. Said "masking member is attached to said part of said surface by inserting said projection(s) of said masking member into said hole(s) or indention(s) of said part to protect said *S S part from a surface treatment such as coating, plating, and the like.

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0000 MASKING MEMBER BACKGROUND OF THE INVENTION The present invention relates to a masking member which protects a part of a surface of an article from a surface treatment such as coating, plating, vacuum evaporation, phosphatizing, and the like. More particularly, the present invention relates to a masking member produced by the molding ooooo S of a sheet having a shape corresponding with a part of a

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surface of an article to be protected from a surface treatment wherein said masking member has projection(s) which is(are) inserted into hole(s) or (an) indention(s) ee of said part. When a surface treatment is effected on see the surface of an article, and if said surface of said article has part(s) on which said surface treatment should not be effected for the reason that another surface treatment is effected on said part(s) after said surface See.

Sooo treatment of said surface treatment spoils the appearance of said article and so on, said part(s) of said surface of r said article may be covered and protected with said masking member.

DESCRIPTION OF THE PRIOR ART Hitherto, adhesive tape has been used as a masking member to protect a part of a surface of an article such as a bumper of an automobile and the like. Namely, the adhesive tape is attached to said part of said surface to protect said surface from said surface treatment and after said surface treatment, said adhesive tape is removed from said surface. Said surface may not be effected by said surface treatment since said part of said surface was covered with said adhesive tape during said surface treatment.

-iA- 2 Nevertheless, adhesive tape as a masking member has faults in that attaching and removing of the adhesive tape to/from said part of said surface take time and have a high labor cost, and further, the adhesive tape attached to said part of said surface is buried in the layer of said surface treatment and it is very difficult to find the end of said buried adhesive tape to remove said adhesive tape. Said faults of adhesive tape may seriously obstruct a mass-production line such as a coating line for automobiles.

SUMMARY OF THE INVENTION Accordingly, there is provided a masking member of molded sheet material having a surface corresponding to the surface of an article to be protected from a surface treatment by said masking member, said surface of said article having a hole or indentation therein and said masking member having a projection thereon for insertion or fitting into said hole or indentation of said surface of said article to be protected, said molded sheet material comprising sheet material selected from the group consisting of fiber sheet, thermoplastic resin-impregnated fiber sheet, thermosetting resin-impregnated fiber sheet, sheet wood, sheet SOon Qak.+o+ eri c 2 metal andLplastic or rubber sheet having inorganic filler material mixed 20 therein.

~BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG. 4 relate to an embodiment of the present invention.

:I FIG. 1 is a perspective view of the masking member.

FIG. 2 is a partial perspective view of the front part of an automobile.

FIG. 3 is a partial perspective view of the front part of the automobile after coating.

*o STA/LMM/1693m FIG. 4 is a cross sectional view of the lower half part of the bumper to which the masking member is attached.

FIG. 5 is a partial perspective view of the front part of the automobile after the masking member is removed from the bumper.

FIG. 6 and FIG. 7 relate to another embodiment of the present invention.

FIG. 6 is a perspective view of the masking member.

*o FIG. 7 is a cross sectional view showing that the masking member is attached to a part of a surface.

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DETAILED DESCRIPTION The masking member of the present invention is made of a sheet such as from plastics or rubber such as polystyrene, polyethylene, polypropylene, ethylene-propylene copolymer, polyvinylchloride, polyvinylidene chloride, polymethacrylate, styrene-butadiene copolymer, acrylonitrile-butadiene copolymer, polybutadine polyisoprene, polyisobutylene, polychloroprene, isoprene-isobutylene copolymer, natural rubber, polyurethane, melamine resin, urea resin, phenolresin, epoxyresin and the like; foams of said plastics; or said rubber; fiber sheet such as fabricrubber, knitting, non-woven fabric, paper, corrugated cardboard and the like; thermoplastic resin impregnated fiber sheet; thermosetting resin impregnated fiber sheet; wooden sheet such as wood board, hardboard, plywood and the like; metal sheet and the like; laminated sheet consisting of a plural number of sheets selected from the group of said sheets. In cases where said masking member is made of a sheet from plastics or rubber, it is desirable to mix inorganic filler such as calcium carbonate, silica, talc, clay, bentonite, stone powder, blast furnace slag, flyash, and the like into said plastics or rubber since heat resistance, mechanical properties and the like of said masking member are improved by said inorganic filler and further, when a used masking member is burnt in a combustion furnace, a smaller combustion energy is produced so that said combustion furnace will stand long use. Usually, 10 to 500 weight parts, desirably to 400 weight parts of said inorganic filler are mixed into said plastics. Further organic filler such as wood oo S powder, organic, fiber powder, walnut powder, coconut powder, flour, chaff powder and the like may be mixed into said plastics or rubber. Still further, dyestuff, pigment, autioxidant, ultraviolet absorber plasticizer and the o. •like may be mixed into said plastics or rubber. Polyolefin such as polyethylene, polypropylene and the like are desirable plastics for the material of the sheet of the masking member of the present invention since said polyoldfin *has high solvent resistance and is inexpensive, and of course, polyolefin in which said inorganic filler is mixed is a desirable material for said masking member. Polystyrene foam is also a desirable material for said masking member since said polystyrene foam is light and inexpensive, nevertheless, since said polystyrene foam has a low solvent resistance and a low heat resistance, it is desirable to laminate a suitable plastic or rubber onto said polystyrene foam.

Vacuum forming, press molding, casting, extrusion, injection, molding, paper making and the like may be used to produce the masking member of the present invention.

The masking member of the present invention is easily attached to a part of a surface of an article to be protected by inserting projection(s) of said masking member into said hole(s) or indention(s) of said part and said masking member is easily removed from said part by extracting said projection(s) of said masking member from said hole(s) or indention(s) of said part. Accordingly, said masking member of the present invention can be correctly, easily, and securely attached to a part of a surface by the guide of said hole(s) or indention(s) of said part and said projection(s) of said masking member.

Fig. 1 to Fig. 5 relate to an embodiment of the present S invention. Referring now to Fig. 1 to Fig. 5, a masking member (110) is produced by the molding of a sheet (111) and has a shape corresponding with the surface of the :lower half (211) of a bumper (210) of an automobile (310) and a bending part (111B) is elongated from the lower edge "e of said masking member (110) and projections(111A) are formed on the surface of said bending part (111B). Further, a reinforcing rib (113) is formed in said masking member (110) and an adhesive layer (112) is formed on the upper edge of the inside of said masking member (110).

0o°S Said masking member (110) is correctly, easily, and securely attached on said lower half (211) of said bumper (210) by inserting said projections (111A) of said masking member (110) into said holes (212A) of the bending part (212B) which is elongated from the lower half (211) of said bumper (210) and adhering said adhesive layer (112) to the upper edge of said lower half (211) of said bumper (210), and then a paint (410) is coated on said bumper (210) as shown in Fig. 3. After said coating, said masking member (110) is easily removed from said bumper (210) and said paint (410) is not coated on said lower half (211) of said bumper (210) while said paint (010) is coated on the upper half (212) of said bumper (210) as shown in Fig. Fig. 6 and Fig. 7 relate to another embodiment of the present invention. Referring now to Fig. 6 and Fig. 7, a masking member (120) is produced by the molding of a sheet (121) and has a shape corresponding with a part (221) of the surface (220) of the underside of an automobile, and a pair of projections (121A), (121B) are formed in said masking member (120).

Said masking member (120) is attached on said part (221) of said surface (220) of said underside of said automobile by inserting said projections (121A), (121B) of said masking member (120) into said holes (221A), (221B) of said part (221) of said surface (220). In a case that the minimum diameters of said holes (221A), (221B) of said part (221) are respectively a little smaller than the maximum diameters of said projections (121A), (121B) of said masking member (120), said projections (121A), (121B) are tightly inserted into said holes (221A), (221B) and as the result, said masking member is securely attached to said part (221) c* without an adhesive layer. In this case, it is desirable that a laminated sheet consisting of a soft elastic sheet such as a soft-type polyvinylchloride foam sheet, soft-type polyurethane foam sheet, soft-type melamine resin foam sheet, foam rubber sheet, felt sheet and the like, and a rigid sheet such as a hard-type polyvinylchloride sheet, polystyrene sheet, polyethylene sheet, polypropylene sheet, resin-impregnated fiber sheet, hard-type paper, hard-type wooden sheet, metal sheet and the like is used as the material of said masking member (120). In said masking member (120), said soft elastic sheet is located outside said projections (121A), (121B) and said rigid sheet is located inside said projections (121A), (121B). Said surface (220) of said underside of said automobile is then coated with a paint. After said coating, said masking member (120) is removed from said part (221) of said surface (220).

Claims

1. A masking member of molded sheet material having a surface corresponding to the surface of an article to be protected from a surface treatment by said masking member, said surface of said article having a hole or indentation therein and said masking member having a projection thereon for insertion or fitting into said hole or indentation of said surface of said article to be protected, said molded sheet material comprising sheet material selected from the group consisting of fiber sheet, thermoplastic resin-impregnated fiber sheet, thermosetting non- eci-oener' c resin-impregnated fiber sheet, sheet wood, sheet metal and lplastic or rubber sheet having inorganic filler material mixed therein.

2. A masking member in sheet is a polyolefin sheet.

3. A masking member in sheet is a polyolefin sheet in

4. A masking member In weight parts of said inorganic A masking member in sheet is a fiber sheet.

6. A masking member in accordance with claim 1, wherein said accordance with claim 2, wherein said which an inorganic filler is mixed. accordance with claim 3, wherein 10 to 500 filler is mixed in said polyolefin sheet. accordance with claim 1, wherein said accordance with claim 1, wherein said r, sheet is a laminated sheet consisting of a soft elastic sheet and a rigid sheet.

7. A masking member in accordance with claim 1, wherein said masking member is shaped to conform to a lower half of a bumper of an 25 automobile.

8. A masking member in accordance with claim 1, wherein said masking member is shaped to conform to a part of a surface of an underside of an automobile.

9. A masking member substantially as hereinbefore described with reference to the drawing figures. DATED this THIRTY FIRST day of AUGUST 1992 Nagoya Oilchemical Co., Ltd. Patent Attorneys for the Applicant SSPRUSON FERGUSON STA/LMM/1693m