JP5100271B2 - Masking material for painting - Google Patents

Description

  The present invention relates to a coating masking material used for protecting a hole or a recess and its periphery from the coating during coating.

  Conventionally, as this type of masking material for coating, as shown in FIG. 5, a masking material 11 having a structure comprising an insertion portion 12 to be inserted into a hole portion and a flange portion 13 covering the periphery of the hole portion. Is provided.

As shown in FIG. 6, the masking material 11 is attached to the hole H by inserting the insertion portion 12 into the hole H of the coating object A. In this state, the flange portion 13 of the masking material 11 is attached. Covers the periphery of the hole H.
In this state, the surface of the coating object A is applied by, for example, spray coating (see, for example, Patent Documents 1 and 2).

Japanese Patent No. 2863171 Japanese Patent No. 3675495

  In the conventional masking material 11, since the flange portion 13 of the masking material 11 is substantially in close contact with the periphery of the hole H, the paint P is applied to the flange portion 13 of the masking material 11 and the hole portion during painting. It penetrates between the surroundings of H by capillarity, and the periphery of the hole H cannot be completely protected from painting, the boundary between the painted part and the non-painted part is not clear, and the appearance is deteriorated. There was a problem of doing so.

The present invention is a masking material 1 used as a means for solving the above-described conventional problems to protect the hole H or the concave portion and the surrounding S thereof from painting, and the masking material 1 includes: One or a plurality of insertion portions 2 to be inserted into one or a plurality of holes H or recesses, and a periphery S of the hole H or the recesses extending from the end of the insertion portion 2 A plurality of convex portions 4 are formed on a surface opposite to the hole H or the periphery S of the concave portion on the back side of the flange portion 3. The masking material 1 for coating whose thickness is 0.1 mm-1.0 mm is provided.
The masking material 1 is preferably manufactured by vacuum and / or pressure forming of a thermoplastic sheet.

[Action]
The masking material 1 for painting of the present invention is attached to the hole H or the concave portion by inserting the insertion portion 2 into the hole H or the concave portion, and in this state, the periphery S of the hole H or the concave portion is The masking material 1 is covered with the flange portion 3. Since a plurality of convex portions 4 are formed on the surface opposite to the hole H or the periphery S of the concave portion (the back surface of the flange portion 3) on the back side of the flange portion 3, the spacer function of the convex portion 4 is achieved. Thus, a slight gap d is formed between the flange 3 and the hole H or the periphery S of the recess. Since the gap d, that is, the height of the convex portion 4 of the flange portion 3 is set to 0.1 mm to 1.0 mm, the flange 3 of the masking material 1 is applied when the coating object B is coated. The paint does not enter the gap d between the hole H and the hole H.
When the height of the convex portion 4 of the flange portion 3 is less than 0.1 mm, the paint P easily enters the gap d due to a capillary phenomenon, while the height of the convex portion 4 exceeds 1.0 mm. And the gap d becomes large, and the paint P easily enters. Further, the distance from the tip of the flange 3 (the tip in the extending direction of the flange 3 from the end of the insertion portion 2 and the outer peripheral edge of the flange 3) to the convex portion 4 (from the end of the insertion portion 2). Assuming that the extending direction of the flange 3 is the width direction of the flange 3, the distance in the width direction is preferably 0.2 mm or more.

〔effect〕
Therefore, in the present invention, the hole or recess not to be painted and the periphery of the hole or recess are completely protected by the masking material, and the appearance is excellent.

The invention is illustrated in detail in the following by means of the examples shown in FIGS.
Reference numeral 1 denotes a masking material, which is used, for example, to protect the air intake H, which is a hole of a bumper B of an automobile, which is an object to be coated, and its surrounding S from painting. mouth H is partitioned into a plurality of compartments hole H ₁ by a plurality of vertical bars h ₁ and one of the lateral beam h ₂ (see FIG. 1).

The masking material 1 includes an insertion portion 2 to be inserted into the air intake port H, and a flange portion 3 for covering the periphery S of the air intake port H. From the bottom of the insertion portion 2 one lateral桟嵌in groove 2B for mating with a plurality of longitudinal桟嵌in groove 2A for fitting a plurality of vertical bars h ₁ of the air intake H, the lateral crosspieces h ₂ is The insertion portion 2 is partitioned into a plurality of partition insertion portions 21 by the plurality of vertical beam insertion grooves 2A and the one horizontal beam insertion groove 2B (FIG. 1, FIG. 1). (See FIG. 2).
A plurality of convex portions 4 are formed on the back surface of the flange portion 3 of the masking material 1. The height of the convex portion 4 is set in a range of 0.1 mm to 1.0 mm (see FIGS. 2 and 3).

  The masking material 1 is manufactured by vacuum and / or pressure forming a thermoplastic resin sheet. According to the vacuum and / or pressure forming, it becomes easy to mass-produce a mask material having a complicated shape. However, in the present invention, the masking material 1 may be manufactured by other molding such as press molding, injection molding, blow molding and the like.

  Examples of the thermoplastic resin material of the thermoplastic resin sheet include, for example, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-propylene terpolymer, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, polystyrene, Polycarbonate, polyvinyl acetate, fluororesin, thermoplastic acrylic resin, thermoplastic polyester, thermoplastic polyamide, thermoplastic urethane resin, acrylonitrile-butadiene copolymer, styrene-butadiene copolymer, acrylonitrile-butadiene-styrene copolymer, Engine alignment plastics such as acrylonitrile-ethylene-styrene copolymer, polyphenylene ether, polyimide, polysulfone, polyetheretherketone, corn, Biodegradable resins polylactic acid obtained from starches, such as sugar cane as a raw material is illustrated.

Examples of the thermoplastic resin include calcium carbonate, magnesium carbonate, barium sulfate, calcium sulfate, calcium sulfite, calcium phosphate, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, magnesium oxide, titanium oxide, iron oxide, zinc oxide, Alumina, silica, diatomaceous earth, dolomite, gypsum, talc, clay, asbestos, mica, glass fiber, carbon fiber, calcium silicate, bennite, white carbon, carbon black, iron powder, aluminum powder, stone powder, blast furnace slag, fly Inorganic fillers such as ash, cement, zirconia powder, cotton, hemp, bamboo fiber, palm fiber, wool, silk and other natural fibers, polyamide fiber, polyester fiber, acrylic fiber, viscose fiber, acetate fiber, vinyl chloride fiber, Vinylidene chloride fiber, Organic fibers such as nylon fiber and acetate fiber, asbestos fiber, glass fiber, carbon fiber, ceramic fiber, metal fiber, whisker and other inorganic fibers, linter, linen, sisal, wood flour, palm flour, walnut flour, starch, wheat flour In addition, reinforcing materials such as wood fillers, wood powder, and organic fillers such as incineration ash of sludge generated by wastewater treatment may be added to improve shape retention, dimensional stability, compression and tensile strength, and the like. Other pigments and dyes, plasticizers such as DOP and DBP, antioxidants, antistatic agents, crystallization accelerators, flame retardants, flameproofing agents, insecticides, preservatives, waxes, lubricants, antiaging agents, UV absorption A third component such as a foaming agent such as an agent, a chemical foaming agent or a capsule-type foaming agent may be added. These components may be added singly or in combination of two or more.
Examples of flame retardants include phosphorus flame retardants, nitrogen flame retardants, sulfur flame retardants, boron flame retardants, bromine flame retardants, guanidine flame retardants, phosphate flame retardants, phosphate ester flame retardants, and amino resins. There are flame retardants.

  A foaming agent is added to the thermoplastic resin and provided as expandable beads or expandable pellets. Examples of the foaming agent include 2,2′-azobisisobutyronitrile, p, p′-oxybis ( Benzenesulfonyl hydrazide), p, p'-oxybis (benzenesulfonyl semicarbazide), N, N'-dimethyl-N, N'-dinitrosotephthalamide, N, N'-dinitrosopentamethylenetetramine, azodicarbonamide, hydra There are organic foaming agents such as zodicarbonamide, barium azodicarboxylate, diazoaminobenzene, 1,1′-azobisformamide, and inorganic foaming agents such as sodium hydrogen carbonate and sodium nitrite.

The masking material 1 is attached to the air intake H by inserting the insertion portion 2 into the air intake H of the bumper B. In this state, the vertical beam h ₁ of the air intake H is the masking material. The horizontal beam h ₂ is fitted into the vertical beam fitting groove 2 A of the material 1, and the horizontal beam h ₂ is fitted into the horizontal beam fitting groove 2 B of the masking material 1. each of which is inserted into the compartment holes H ₁ of inlet H (see FIGS. 2 and 3). The flange portion 3 of the masking material 1 covers the periphery S of the air intake port H. Since a plurality of convex portions 4 are formed on the back surface of the flange portion 3, the flange 3 and the air A gap d is formed between the inlet H and the periphery S corresponding to the height of the convex portion 4 (see FIG. 4).

  After the masking material 1 is attached to the air intake port H, the bumper B is painted. The coating is usually performed by spraying paint P. At this time, between the flange portion 3 of the masking material 1 and the air intake port H, as shown in FIG. Since the gap d corresponding to the height is provided, the coating material P is prevented from entering the gap d by a capillary phenomenon.

  Therefore, in this embodiment, the air intake H is reliably protected from the coating by the masking material 1.

  Other than the above-described embodiments, the masking material 1 of the present invention may be used for protecting a single hole or recess as in the conventional masking material shown in FIGS. In the above embodiment, the masking material 1 is used to protect the air intake port H, which is a hole, but the masking material 1 may be used to protect the recess.

  With the masking material of the present invention, the hole or recess of the object to be painted and its surroundings are reliably protected against painting, the boundary between the painted part and the part to be painted becomes clear, and the coating having an excellent appearance can be obtained. Since it becomes possible, it can be used industrially.

1 to 4 show an embodiment of the present invention.
5 and 6 show a conventional example.
The perspective view of a masking material and an air intake. The masking material attachment state cross-sectional view. The masking material attachment state longitudinal cross-sectional view. Masking material attachment state flange part expansion explanatory drawing. FIG. The attachment state sectional view of a masking material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Masking material 2 Inserting part 3 Flange part 4 Convex part H Air intake S which is a hole part Around a hole part or a recessed part

Claims (2)

  A masking material used to protect a hole or recess and its surroundings from painting, wherein the masking material is inserted into one or more holes or recesses. And a flange portion that extends from the end of the insertion portion and covers the periphery of the hole or the recess, and is a surface facing the periphery of the hole or the recess on the back side of the flange portion A masking material for coating is characterized in that a plurality of convex portions are formed on the surface, and the height of the convex portions is 0.1 mm to 1.0 mm. The masking material for coating according to claim 1, wherein the masking material is produced by vacuum and / or pressure forming of a thermoplastic sheet.

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