Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
MASXING MEMBER
BACKGROUND OF THE INVENTION
The present invention relates to a masking member which
protects a part of an article from a surface treatment
such as coatin~, plating, vacuum evaporation, phosphatizing,
and the like. More particularly, the present invention
relates to a masking member consisting of a pair of divided
cylindrical parts, wherein said masking member surrounds a
circumference of a pillar part of an article by combining
said pair of divided cylindrical parts. When a surface
treatment is effected on the surface of an article, and if
said surface of said article has a 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 treatment or said surface treatment spoils the
appearance of said article and so on, said part(s) of said
surface of said article may be covered and protected with
said masking member.
DESCRIPTION OF THE PRIOR ART
Hikherto, adhesive tape has been used as a masking member
to protect a pillar, frame, al1d the like. Namely, the
adhesive tape is wound round said pillar, frame, and the
like to protect them from said surface treatment and after
said surface treatment, said adhesive tape i9 removed from
said pillar, frame, and the like. Said pillar, frame, and
the like may be not effected by said surface treatment since
said pillar, frame, and the like was covered with said
adhesive tape during said surface treatment.
Nevertheless, adhesive tape as a masking member has faults
in that attaching and removing of the adhesive tape to/from
a pillar, framè, and the like take time and have a high
labor cost, and further, the adhesive tape wound round a
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pillar, frame, and the like is buried in the layer of said
surface treatment and it is very difficult to find the
outer 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, an object of the present invention is to save
trouble when the masking member is attached/removed to/from
a part to be protected such as a pillar, frame, and the
like. According to the present invention, there is provided
a maskin~ member consisting of a pair of divided cylindrical
parts, wherein said masking member surrounds a circumference
of a pillar part of an article by combining said pair of
divided cylindrical parts. Said masking member may be
attached on a pillar, frame, and the like by bending said
masking member along said groove(s) to surround said pillar,
frame, and the like.
~RIEF DESCRIPTION OF THE DRAWINGS
FI~. 1 to FIG. 4 relate to a first embodiment of the
present invention.
FIG. 1 is a perspective view of the masking member.
FIG. 2 is a cross sectional view showing that the masking
member is attached on a pillar.
G. 3 is a partial front view of the pillar after coating.
FIG. 4 is a partial front view of the pillar after the
masking member is removed.
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FIG. 5 and FIG. 6 relate to a second embodiment of the
present invention.
FIG. 5 is a perspective view of the masking member.
FIG. 6 is a perspective view showing that the masking
member is attached on a pi~lar.
FIG. 7 is a cross sectional view showing that the masking
member of a third embodiment is attached on a pillar.
DETAILED DESCRIPTION
Fig. 1 to Fig. 4 relate to a first embodiment of the present
invention. Referring now to Fig. 1 to Fig. 4, a masking
member (112) consists of a pair of divided cylindrical
parts (112A) and ( 11 2B) and adhesive layers ( 115 ) are
respectively formed on the inside of said pair of divided
cylindrical parts (112A) and (1l2B). The inside of said
masking member (l12) is made of a polyst~rene foam sheet
(113) and the outside o~ said masking member (112) is made
of a non-foamed polystyrene film ~114) which is laminated
on said polystyrene foam sheet (113).
Said pair of divided cylindrical parts (112A) and (112B)
are respectively attached on the circumference of a part
(111A) of a pillar (111) of the door of an automobile by
said adhesive layers ( 115 ) to set up said masking member
(112) as shown in Fig. 2. After said part (111A) of said
pillar (111) is covered with said masking member (112)
consisting of said pair of divided cylindrical parts (112A)
and (112B), said pillar (111 ) is coated by spraying a paint
(116) as shown in Fig, 3, and said part (111A) of said
pillar (111 ) which is covered with said masking member (112)
is not coated with said paint (116). After coating, said
pair of divided cylindrical parts (112A) and (112B) of said
masking member (112) are respectively removed from said
part (111A) of said pillar (111) and said pillar (111)
has said part (111A) which is not coated with said paint
as shown in Fig. 4. In this embodiment, said polystyrene
foam sheet (113) having a low solvent resistance and a low
heat resistance is protected by said non-foamed polystyrene
film (114) which covers the outside of said polystyrene foam
sheet (113) so that said masking member (112) has an improved
solvent resistance and an improved heat resistance and said
masking member (112) may not deform when said masking
member (112) is heated around 150C during a drying process
so as to be able to reuse said masking member (112).
FigO 5 and Fig. 6 relate to a second embodiment of the
present invention. Referring now to Fig. 5 and Fig. 6, a
masking member (122) consists of a pair of divided cylindrical
parts (122A) and (122B) and two indented parts (123) are
respectively formed in both edges of said one divided
cylindrical part (122A) and two insert parts (124) are
respectively formed in both edges of said other divided
cylindrical part (122B). Said masking member (122) is made
of a polypropylene in which 30~ by weight of calcium carbonate
is mixed. Said pair of divided cylindrical parts (122A)
and (122B) are respectively attached on the circumference
of a part (121A) of a pillar (121) and said insert parts
(124) of said divided cylindrical part (122B) are respectively
inserted into said indented parts (123) of said divided
cylindrical part (122A) to secure said divided cylindrical
part (122B) respectively, and said masking member (122) is
assem~led from said pair of divided cylindrical parts (122A)
and 1122B) as shown in Fig. 6. After a surface treatment,
said divided cylindrical parts (122A) and ~122s) are
respectively removed from said part (121A) of said pillar
(121) by hand, hook, and the like.
Fig. 7 relates to a third embodiment of the present invention.
Referring now to Fig. 7, a masking member (132) consists
of a pair of divided cylindrical parts 1132A) and (132B)
made of an elastic material, and cllp parts 1133) are
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respectively formed at both edges of said divided cylindrical
parts (132A) and (132B). Said pair of divided cylindrical
parts (132A) and (132B) are respectively attached on the
circumference of a part (131A) of a pillar (131 ) and fixed
by pinching respectively said part (131A) of said pillar
(131 ) between said clip parts (133) of said divided
cylindrical parts (132A) and (132B) and said masking member
(132) is assembled from said divided cylindrical parts (132A)
and (1 32B) .
The masking member of the present invention is made of an
elastic sheet such as ~rom plastics such as polystyrene,
polyethylene, polypropylene, polyYinylchloride, polyurethane,
melamine resin, urea resin and the like; plastic ~oams of
said plastics; laminated sheet of said plastic foams and
said plastics; fiber sheet such as fabric, knitting,
non-woven fabric, paper, corrugated card board and the like;
thermoplastic resin - impregnat:ed fiber sheet; thermo-
setting resin - impregnated fiber sheet; wooden sheet
such as wood board, hardboard, plywood and the like; metal
sheet and the like.
In cases where said masking member is made of plastics, it
is desirable to mix inorganic filler such as calcium
carbonate, talc, bentonite, stone powder, blast furnace
slag, flyash, and the like into said plastics since heat
resistance, mechanical properties and the like o~ said
masking member are improved by said inorganic filler and
further, when used mas~ing member is burnt in a combustion
furnace, a smaller combustion energy is produced so that
said combustion furnace will stand long use. Usualy, 10
to 500 weight parts, desirably 20 to 400 weight part of
said inorganic filler are mixed into said plastics.
Polyolefin such as polyethylene, polypropylene and the like
is desirable plastics for the material of the masking member
of the present invention since said polyolefin has high
solvent resistance and is inexpensive, and of course, poly-
olefin in which said inor~anic filler is mixed is a desirable
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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 onto said polystyrene foam.
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