JP5036431B2 - Masking material - Google Patents

Description

  The present invention relates to a masking material for protecting a vertical rail formed in an air intake port of an automobile bumper from a surface treatment such as painting.

  2. Description of the Related Art Conventionally, for example, some bumpers of an automobile have a hole portion for taking in air, and there are some in which a vertical beam is extended inside the hole portion. In the application of the bumper, there is a case where only the vertical beam is not intentionally applied. In such a case, the bumper is applied after a masking material is applied to the vertical beam. The masking material is obtained by vacuum forming a resin sheet into a predetermined shape, and includes a sheet body and a fitting recess that is bent in the sheet body so as to be fitted to the vertical rail.

  However, in the conventional masking material, the outer peripheral depth of the fitting recess is substantially the same as the depth width of the vertical rail, and therefore the hole is blocked in a state where it is attached to the bumper. As a result, there was a problem such that the paint that could not pass through the hole and lost its place formed paint unevenness (processing failure), and the bumper was soiled (stained).

  The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a masking material capable of preventing defects such as processing failure and fouling caused by a surface treatment agent while suitably protecting a vertical beam to be protected from surface treatment.

As a means for solving the above-described conventional problems, the present invention provides a surface of one or more vertical rails that are passed to the frame by being fitted into a hole formed by the frame. A masking material that protects from processing, and is formed by bending one or a plurality of strip fitting grooves that are fitted from the sheet main body to the vertical beam, By setting the outer peripheral depth d to be greater than the depth width w of the frame (d> w), the upper and lower edges of the seat body and the frame are fixed in a state in which the beam fitting groove is fitted to the vertical beam. Provided is a masking material in which a gap s is formed between upper and lower edges.
The width of the masking material is set smaller than the width of the hole, and a gap s ′ is formed between the left and right edges of the masking material and the left and right edges of the frame. Is desirable.
Moreover, the said frame comprises the bumper for motor vehicles, and it is desirable for the said hole part to be an air intake provided in this bumper.

[Action]
In the masking material of the present invention, the seat main body in a state in which the beam fitting groove is fitted to the vertical beam by making the outer peripheral depth d of the beam fitting groove forming portion larger than the depth width w of the frame. Protrudes to the back side of the frame from the inside of the hole. For this reason, a gap s is formed between the upper and lower edges of the sheet body and the upper and lower edges of the frame, and the surface treatment agent such as paint can pass through the gap s to the back side of the frame. It becomes like this. As a result, it is possible to prevent problems caused by surface treatment agents such as paint.
Further, by setting the width of the masking material to be smaller than the width of the hole and forming a gap s ′ between the left and right edges of the masking material and the left and right edges of the frame, the surface treatment agent such as paint can be further added It is possible to pass through the gap s ′ to the back side of the frame.
Further, the masking material is particularly useful for the production of mass-produced bumpers when applied to bumpers for automobiles.
〔effect〕
In the present invention, it is possible to prevent defects such as processing defects and fouling around the vertical bars caused by the surface treatment agent while suitably protecting the vertical bars to be protected during the surface treatment of the frame from the surface treatment. it can.

Hereinafter, an embodiment embodying the masking material of the present invention will be described.
As shown in FIG. 1, a bumper 10 of an automobile is configured in a frame shape by a plurality of frames 11, and the bumper 10 configured in this frame shape has a total of three pairs of upper and lower pairs as holes. An air intake 12 is provided. A plurality of vertical bars 13 are provided inside the air intake ports 12.
In the bumper 10, the plurality of frames 11 are painted on the outer surface during the surface treatment, whereas the plurality of vertical rails 13 are uncoated by applying a masking material during the surface treatment. It is said that.

2A is a front view of the masking material, FIG. 2B is a bottom view, FIG. 2C is a rear view, and FIG. 2D is a side view. Moreover, FIG.2 (e) is sectional drawing in the EE line of (a), (f) is sectional drawing in the FF line of (a),
The masking material 20 is formed by bending a plurality of strip fitting groove forming portions 22 from the sheet main body 21 so as to protrude to the front side of the sheet main body 21. A beam fitting groove 23 to be fitted to the vertical beam 13 is formed inside the beam fitting groove forming portion 22. Reinforcing strips 24 are formed between the plurality of rail fitting groove forming portions 22 so as to protrude to the front side of the sheet main body 21. The reinforcing strip 24 improves the rigidity of the seat body 21 so as not to bend or deform, thereby preventing the rail fitting groove 23 from being unable to be fitted into the vertical rail 13. ing.
Sub-reinforcing lines 25 are formed on the upper and lower sides of the reinforcing line 24 so as to protrude toward the back side of the sheet body 21. The sub-reinforcing strip 25 improves the rigidity of the sheet main body 21 in the same manner as the reinforcing strip 24, thereby preventing the cross-fitting groove 23 from being unable to fit into the vertical cross 13. In addition, convex portions 26 are formed on both sides of the sheet main body 21 so as to protrude toward the back side of the sheet main body 21. These auxiliary reinforcing strips 25 and convex portions 26 project the end portions of the masking material 20 in the left-right direction to the inside of the cross-fit groove 23, and the cross-fit grooves are formed in the vertical cross 13 by the end portions. A locking portion 27 is configured to be locked to the vertical rail 13 when 23 is fitted.

  The masking material 20 is manufactured by molding a thermoplastic resin sheet into a predetermined shape. Examples of the thermoplastic resin include polystyrene (PS), polyethylene (PE), polypropylene (PP), ethylene-propylene copolymer, polyvinyl chloride (PVC), vinylidene chloride copolymer, and ethylene-vinyl acetate copolymer. , Thermoplastics such as thermoplastic polyester, or polyamide, polyacetal, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, polyphenylene ether, polyphenylene oxide, polysulfone, polyethersulfone, polyphenylene sulfide, polyarylate, polyetheretherketone, crystalline polyester , Polyamideimide, polyimide, polyetherimide, polyaminobismaleimide, methylpentene copolymer, cellulose acetate, etc. -Engineering plastic, or a mixture of two or more of the plastic, or two or more stacked products of the plastic sheets.

  Further, the thermoplastic resin includes 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, calcium silicate, bennite, white carbon, carbon black, iron powder, aluminum powder, stone powder, blast furnace slag, fly ash, Inorganic fillers such as cement and zirconia powder, natural fibers such as cotton, bamboo, hemp, wool, etc., organic synthetic fibers such as polyamide fibers, polyester fibers, acrylic fibers, viscose fibers, acetate fibers, vinyl chloride fibers, vinylidene chloride fibers , 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 and other reinforcing materials added Retention property, dimensional stability, compression and tensile strength may be improved, and flame retardants, flame retardants, insecticides, preservatives, waxes, lubricants, anti-aging agents, antioxidants, UV absorbers , Antistatic agents, crystallization accelerators, chemical foaming agents, foaming agents such as capsule type foaming agents, colorants such as dyes and pigments, plasticizers such as DOP and DBP, etc. Good.

Examples of the method for forming the thermoplastic resin sheet include vacuum forming, pressure forming, and vacuum / pressure forming. In the molding, a mold may be used, or the target article (bumper 10 in the present embodiment) of the masking material 20 is collected before assembling the vehicle body, and the target article may be used as a molding die. Good.
Further, in the masking material 20, the cross fitting grooves 23 do not necessarily have to be a plurality of strips, and may be only one strip. In addition, the masking material 20 may be configured by omitting at least one selected from the reinforcing strip 24, the auxiliary reinforcing strip 25, the convex portion 26, and the locking portion 27.

The coating of the bumper 10 will be described.
As shown in FIG. 3, when painting the surface treatment of the bumper 10, the masking material 20 covers the beam fitting groove 23 from the outer surface side of the frame 11 onto the vertical beam 13 of the air intake 12. , Attached to the bumper 10. At this time, when the masking material 20 is pushed from the outer surface side to the inner surface side of the frame 11, the locking portion 27 gets over the vertical beam 13, and the vertical beam 13 is positioned at the innermost back of the beam fitting groove 23. Then, the locking portion 27 is locked to the vertical beam 13, whereby the beam fitting groove 23 is fitted to the vertical beam 13, and the masking material 20 is placed inside the air intake port 12. Fixed. Then, the bumper 10 is painted while the masking material 20 is attached. In addition, after the painting is completed, the masking material 20 is removed from the bumper 10 so that the unpainted vertical rail 13 appears.

As shown in FIG. 4, the outer peripheral depth d of the beam fitting groove forming portion 22 in the masking material 20 is set larger than the depth width w of the frame 11 in the bumper 10 (d> w). For this reason, a gap s is formed between the upper and lower edges of the sheet body 10 and the upper and lower edges of the frame 11 in a state where the beam fitting groove 23 is fitted to the vertical beam 13. In the application of the bumper 10, the paint as a surface treatment agent passes through the gap 11 in the boundary portion between the masking material 20 and the vertical rail 13 and passes through the back side of the frame 11. In this way, the paint sprayed into the air intake port 12 escapes from the gap s to the back side of the frame 11, so that coating unevenness due to the paint having no escape place, dirt on the bumper, and the like are prevented.
Further, as shown in FIG. 5, the lateral width x of the masking material 20 is set smaller than the lateral width y of the air intake port 12 (x <y). Therefore, a gap s ′ is formed between the left and right end edges of the masking material 20 and the left and right edges of the frame 11 in a state where the crosspiece groove 23 is fitted to the vertical crosspiece 13. During coating, the paint passes not only from the gap s but also from the gap s ′ to the back side of the frame 11 and escapes, so that uneven coating, dirt on the bumper, and the like are reliably prevented.

  In the above embodiment, the masking material 20 is used for the bumper 10, but is not limited to this, and is attached to an air intake or a heat exhaust port in home appliances such as a refrigerator, an air conditioner, a television, a video, a personal computer, and the like. It may be applied to a louver.

  According to the masking material of the present invention, in the surface treatment of a product, it is possible to prevent a treatment failure due to the surface treatment agent and increase the yield of the product, which is extremely useful.

The front view of a bumper. (A) is a front view of a masking material, (b) is a bottom view of the masking material, (c) is a rear view of the masking material, (d) is a side view of the masking material, and (e) is an E- of (a). Sectional drawing in E line, (f) is sectional drawing in the FF line of (a), (g) is sectional drawing in the GG line of (a). The bottom view which shows the state which attaches a masking material to a bumper. The bottom view which shows the state which attached the masking material to the bumper. The front view which shows the state which attached the masking material to the bumper.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Frame 12 Air inlet which is a hole 13 Vertical beam 20 Masking material 21 Sheet body 22 Beam fitting groove forming part 23 Beam fitting groove d Periphery depth of the beam fitting groove forming part w Frame depth x Masking material Width y Width of air intake (hole) s, s' clearance

Claims (3)

A masking material that protects one or more vertical rails passed to the frame from surface treatment by being fitted into a hole formed by the frame,
One or a plurality of rail fitting grooves that are fitted to the vertical rail from the sheet body are formed by bending,
By setting the outer peripheral depth d of the beam fitting groove forming portion to be larger than the depth width w of the frame (d> w), the seat body is fitted with the beam fitting groove fitted to the vertical beam. A masking material, wherein a gap s is formed between upper and lower edges of the frame and upper and lower edges of the frame. The width of the masking material is set smaller than the width of the hole, and a gap s ′ is formed between the left and right edges of the masking material and the left and right edges of the frame. Item 10. A masking material according to Item 1. The masking material according to claim 1 or 2, wherein the frame constitutes a bumper for an automobile, and the hole is an air intake provided in the bumper.

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