JP2013103165A - Method for producing masking material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a production method that can form a masking material for coating and protecting a masking area determined on a member easily and at a low cost.SOLUTION: The method for producing a masking material 10 for coating and protecting a masking area determined on a member includes a first step of using a simplified mold that roughly reproduces a shape of the masking area, and duplicating a hollow duplication mold from the simplified mold by vacuum and/or air-pressure molding using a thermoplastic resin sheet; a second step of applying a liquid elastomer on one surface or both surfaces of the duplication mold and drying the surface(es); and a third step of obtaining the masking material 10 made of the elastomer by peeling the elastomer from the duplication mold.

Description

  The present invention relates to a method for manufacturing a masking material for covering and protecting a masking range on a member such as an exterior material or an interior material of an automobile when surface treatment is performed.

Conventionally, when surface treatment such as painting is applied to the above automotive exterior materials and interior materials, masking material is used to protect the areas that are not desired for surface treatment (protection target areas) in order to protect the paint coating and the holes. Covered and protected.
A normal masking material consists of a sheet material and a tape material. The sheet material covers the area to be protected, and the sheet material is adhered and fixed with the tape material, but the work is complicated and requires time. In addition, it must be disposable for a single use, which is wasteful.
Therefore, a masking material is provided in which a synthetic resin sheet is formed into a shape corresponding to the above-described protection target range by stretch molding (see, for example, Patent Documents 1 and 2), and the masking material corresponds to the protection target range. Therefore, it can be easily mounted just by covering the protection target range, and since it is a molded body, it can be used repeatedly.
In addition, the above-mentioned masking material by stretch molding requires a mold for its production, and the mold is made of metal, synthetic resin or the like as a material, and can be adjusted in size or tapered so that the shape of the protected area can be accurately reproduced. Manufactured by preparing shapes such as attaching and rounding.

JP 2002-293170 A JP 2002-336748 A

By the way, some of the above masking materials are required to strictly cover the range to be protected, for example, by applying different paints correctly, and the like. It is only necessary that the range can be covered, and there are some that are easily used.
The use of a masking material based on the above-described mold as a masking material that is simply used does not qualify qualitatively because it takes time and cost to manufacture the mold. In particular, as the protection target range becomes larger, the time and cost required for manufacturing the mold will increase and become qualitatively unsuitable.
On the other hand, a masking material composed of a normal sheet material and a tape material is wasteful as described above, and does not match the quantity.
For this reason, the masking material has a problem that a simple and inexpensive manufacturing method is required in addition to the method using the mold that can accurately reproduce the shape of the protection target range.
The present invention has been made by paying attention to the problems existing in the above-described conventional technology, and an object of the present invention is to provide a method for producing a masking material capable of forming the masking material easily and inexpensively. There is.

In order to achieve the above object, the invention of a masking material manufacturing method according to claim 1 is a masking material manufacturing method for covering and protecting a masking range defined on a member, wherein the masking range is the masking range. A first step of replicating a hollow replication mold from the simple mold by vacuum and / or pressure molding using a thermoplastic resin sheet, using a simplified mold that roughly reproduces the shape of The gist is to include a second step of applying and drying a liquid elastomer on one or both sides of the mold and a third step of removing the elastomer from the replica mold to obtain the masking material made of the elastomer.
The gist of the invention described in claim 2 is the masking material manufacturing method according to claim 1, wherein the simplified mold is formed by using gypsum or sand as a material.

[Action]
According to the masking material manufacturing method of the present invention, the simple mold, which is the prototype, is a schematic reproduction of the shape of the masking range, and precise adjustment of the shape such as size adjustment, taper, rounding, etc. Not something that went to Even if the masking range is large, it is sufficient that the shape of the masking range can be roughly reproduced. Therefore, the mold may be manufactured simply and inexpensively. In addition, after duplicating a hollow replication mold from the simple mold, and by obtaining a masking material from the replication mold, it is not necessary to directly manufacture the masking material from the simple mold, The simple type does not require much durability. Furthermore, since the replication mold can be easily formed from a thermoplastic resin sheet by vacuum and / or pressure forming, it can be quickly replaced in the event of breakage while satisfying the desired durability. The masking material can be formed easily and in a short time by applying a liquid elastomer on one or both sides of the replication mold, drying, and peeling off. Therefore, the masking material can be provided easily and inexpensively. Will be able to.
In addition, the above simple mold is preferably molded using gypsum or sand as a material, and a flow path for a heat medium or a refrigerant is provided compared to a metal or synthetic resin used as a material. It is not necessary to provide a temperature adjustment function, and it is not necessary to make a fine correction of the shape by polishing or the like, so that it is possible to reduce labor and cost for mold production.

〔effect〕
In the present invention, it is possible to provide a manufacturing method capable of easily and inexpensively molding a masking material that covers and protects a masking range defined on a member.

Explanatory drawing which shows the state which uses the masking material of an Example. Explanatory drawing which shows the state which duplicates a replication type from a simple type in a 1st process. Explanatory drawing which shows the state which apply | coats an elastomer to a replication type | mold at a 2nd process. Explanatory drawing which shows the state which peels a masking material from a replication type | mold at a 3rd process.

An embodiment embodying the masking material in the present invention will be described.
As shown in FIG. 1, the masking material 10 of the present embodiment is an automobile interior material, and a dashboard 1 and a center console 2 integrated with the dashboard 1 are members to be protected. .
In the dashboard 1, an instrument 3 is disposed in the approximate center of the upper surface, a steering column 4 is disposed in front of the driver seat, and a glove box 5 is disposed in front of the passenger seat. . Although not shown in the figure, the center console 2 is equipped with an operation panel and an operation lever for operating devices such as an air conditioner, audio, navigation, etc. Air conditioner wind outlets are attached to the center and both sides.

In this embodiment, the masking range is set to substantially the entire surface of the dashboard 1 excluding the peripheral portion of the steering column 4 and the entire surface of the center console 2. The masking material 10 is configured so that the dashboard 1 and the center console 2 are integrated so that the masking range can be integrally covered so as to protect the masking range and consider the convenience in masking work. Reproduce the shape. The shape reproduction by the masking material 10 is schematic. Specifically, in the masking material 10, the shapes of the instruments 3 and the glove box 5, or the shapes of the operation panel, the operation lever, and the outlet are not reproduced, and the masking material 10 has the above masking range. It is configured to cover uniformly.
The masking material 10 has an advantage that it can cover a large masking range of substantially the entire surface of the dashboard 1 and the entire surface of the center console 2 in a single mounting operation. . Further, the mounting operation of the masking material 10 is simply performed on the dashboard 1 and the center console 2 and is completed in a very simple and short time. The masking material 10 protects the masking range from scratches, adhesion of paint, and the like in surface treatment such as attachment work of various interior materials and the like in the interior of an automobile and painting work.
In the masking material 10, it is not always necessary to integrally form a portion attached to the dashboard 1 and a portion attached to the center console 2. For example, the masking material may be divided into a portion to be mounted on the dashboard 1 and a portion to be mounted on the center console 2, or three or more portions may be divided into three or more portions. You may comprise a masking material. Alternatively, the masking materials divided into the two parts, or the masking materials divided into three or more parts, may be joined together by an adhesive, an adhesive tape or the like to be integrated into one masking material.

  An elastomer is used as the material of the masking material 10. Examples of the elastomer include thermosetting elastomers and thermoplastic elastomers. Specific examples include polyurethane elastomers, polyolefin elastomers, polyester elastomers, polyamide elastomers, or styrene-butadiene-styrene block copolymers (SBS). ), Styrene-isoprene styrene block copolymer (SIS), α-methylstyrene-butadiene-α-methylstyrene block copolymer, α-methylstyrene-isoprene-α-methylstyrene block copolymer, styrene-hydrogenated Examples thereof include styrene-based elastomers such as polyolefin-styrene block copolymers (SEBS, SEPS). Among these, polyurethane-based elastomers, particularly thermosetting polyurethane-based elastomers are desirable because they are excellent in heat resistance and durability and easy to handle.

A method for manufacturing the masking material 10 will be described.
As shown in FIG. 2, in the first step of the manufacturing method, the simple mold 20 is used as a mother mold, and a hollow replica mold 20A is duplicated from the simple mold.
The simplified type 20 is formed so as to roughly reproduce the shape of the masking range, that is, the shape of the dashboard 1 and the center console 2, and like the masking material 10, the instrument 3 The shape of the glove box 5 or the detailed shape such as the shape of the operation panel, the operation lever, or the outlet is not reproduced. Examples of the material of the simplified mold 20 include gypsum or sand, synthetic resins such as thermoplastic resins and thermoplastic resins, and metals such as aluminum, iron, and copper. From the viewpoint of easy and low material cost, it is desirable to use gypsum or sand, and from the viewpoint of easy mold forming, it is more desirable to use gypsum.

  Replication of the replication mold 20A from the simplified mold 20 is performed by vacuum and / or pressure forming using a thermoplastic resin sheet, and the replication mold is obtained by duplicating the shape of the simplified mold 20 from the thermoplastic resin sheet. 20A is obtained. When the replica mold 20A is obtained by vacuum and / or pressure forming, an excess portion 20B is generated around the replica mold 20A. However, the excess portion 20B may be used with the replica mold 20A as it is, or may be excised. Also good.

The thermoplastic resin sheet is not particularly limited as long as it can be vacuum-formed and / or compressed-air molded. However, considering its use as the replication mold 20A, elasticity and separation with respect to the elastomer, particularly polyurethane elastomer, are not considered. Those having moldability are desirable, and as such thermoplastic resins, polypropylene (PP), polyethylene (PE), polystyrene (PS), acrylonitrile-styrene-copolymer (AS), acrylonitrile-butadiene-styrene copolymer Polymer (ABS), polycarbonate (PC), acrylonitrile-ethylene-styrene copolymer (AES), polymethyl methacrylate (PMMA), ethylene-propylene copolymer (EPR), polyvinyl chloride (PVC), vinylidene chloride Polymer, ethylene-vinyl acetate copolymer, etc. It is below.
In addition to the above-mentioned thermoplastic resins, polyamide (PA), polyphenylene ether (PPE), modified polyphenylene ether (modified PPE), polyester, polyacetal (POM), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polysulfone (PSF), polyethersulfone (PES), polyphenylene sulfide (PPS), polyarylate (PAR), polyetheretherketone (PEEK), polyamideimide (PAI), polyimide (PI), polyetherimide (PEI), polyamino Thermoplastic engineering plastics such as bismaleimide, methylpentene copolymer (TPX), and cellulose acetate (CA) may be used.
The PP may be polypropylene modified with PE and / or EPR (modified PP). Furthermore, you may use the polymer alloy or polymer blend containing 2 or more types of the said thermoplastic resin. Alternatively, a biodegradable resin made from polylactic acid obtained from starch such as corn or sugar cane may be used as the thermoplastic resin. Among these thermoplastic resins, PP or modified PP is particularly desirable because it is a material that has desirable vacuum and / or pressure forming properties and is easy to deep-draw.

As shown in FIG. 3, in the second step of the manufacturing method, a liquid elastomer E is applied to the outer surface, which is one surface of the replication mold 20A, and dried.
Examples of the method for applying the liquid elastomer E include ordinary application methods such as spray coating and brush coating. In the case of a polyurethane-based elastomer, the urethane foam may be applied while foaming and curing using a spray gun or the like.
As shown in FIG. 4, in the third step of the production method, the masking material 10 made of the elastomer is obtained by removing the elastomer from the replication mold 20A.
In order to facilitate the peeling of the masking material 10, in the second step, before applying the liquid elastomer E, a normal release agent such as paraffin may be applied to the outer surface of the replication mold 20A. Good.
And when mass-producing only the said masking material 10, the said 2nd process and the said 3rd process are performed repeatedly. When the duplicate mold 20A is further required, the first to third steps are repeated.

The present invention is not limited to the above-described form, and may be modified as follows.
The masking object by the masking material 10 is not limited to the dashboard 1 and the center console 2 as long as it is an automobile interior material, and may be a door trim, a pillar cover, a luggage trim, or the like. Further, the masking target is not limited to the automobile interior material, and may be an automobile exterior material such as a fender panel, a door panel, a bonnet hood, a bumper or the like.
In the second step, the liquid elastomer E is applied to the outer surface that is one surface of the replication mold 20A. However, the liquid elastomer E may be applied to the inner surface that is one surface of the replication mold 20A. In particular, since the masking material 10 is placed on the outside of the member, it is formed by applying the liquid elastomer E on the outer surface of the replication mold 20A. For example, the member is inserted from the inside such as being fitted into a hole. If it is a masking material that protects, it is desirable to form it by applying a liquid elastomer to the inner surface of the replication mold. Furthermore, for example, if it is a masking material for a member that needs to protect both the outside and the inside through a hole or the like, a liquid elastomer is applied to the outer surface and the inner surface that are both sides of the replication mold, so The masking material can be formed at once.
The simplified mold 20 may be formed by molding from an actual member to be masked, or may be formed from a design drawing using CAD, CAM, or the like.

  The method for producing a masking material of the present invention can be industrially used because the masking material can be molded easily and inexpensively.

10 Masking material 20 Simple type 20A Replica type

Claims (2)

A method of manufacturing a masking material that covers and protects a masking range defined on a member,
A first step of replicating a hollow replication mold from the simple mold by vacuum and / or pressure molding using a thermoplastic resin sheet, using a simple mold that roughly reproduces the shape of the masking range; ,
A second step of applying and drying a liquid elastomer on one or both sides of the replication mold;
A third step of removing the elastomer from the replication mold to obtain the masking material comprising the elastomer;
A method for producing a masking material, comprising: The method for producing a masking material according to claim 1, wherein the simple mold is formed using gypsum or sand as a material.

Images