JPH1142703A - Method for repairing bathtub - Google Patents

Abstract

PROBLEM TO BE SOLVED: To repair an existing bathtub at extremely low cost within a short term of works to obtain a bathtub having a beautiful inner surface. SOLUTION: An air-pressure or vacuum forming machine 2 is arranged above an existing bathtub 1. A sheet 4 is pressed to the upper surface of the bathtub 1 and subsequently heated to a predetermined temp. to be softened. Subsequently, air pressure is applied to the upper surface of the sheet 4 or the air between the sheet 4 and the inner surface of the bathtub 1 is sucked to closely bond the sheet 4 to the inner surface of the bathtub 1. After the sheet 4 is cooled and hardened to form a molded object the molded object is detached from the bathtub 1. After an adhesive is applied to the outer surface of the molded object or the inner surface of the bathtub 1, the molded object 5 is fitted in the bathtub 1 to be bonded thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing an existing bathtub.

[0002]

2. Description of the Related Art Conventionally, stainless steel, enamel, FR
Bathtubs of P, polyvinyl chloride, artificial marble and the like are used.

[0003] If the inside of the bathtub is damaged or the inside of the bathtub is deteriorated, a technique for repairing (reforming) the bathtub itself has not been developed yet. Although it cannot be obtained, it is a large-scale construction and requires considerable cost.

[0004] In some cases, the damaged surface is repaired by painting, but it is an emergency, and the coating film is not sufficiently durable where a long-term hot water resistance is required, such as a bathtub.

[0005]

DISCLOSURE OF THE INVENTION The present invention solves such a problem and renovates a bath tub that can replace an existing bath tub with a beautiful inner surface in a very low cost and short construction period. The aim is to provide a method.

[0006]

A method for repairing a bathtub according to the present invention is a method for repairing an existing bathtub, in which a thermoplastic resin sheet is pressed using a compressed air or vacuum forming machine along the inner surface of the bathtub. Molding, removing the molded body from the bathtub, forming an adhesive layer on the inner surface of the bathtub or the outer surface of the molded body, and fitting the molded body into the bathtub. .

According to the method for repairing a bathtub of the present invention,
A molded article having a shape suitable for bathtubs of almost all shapes can be formed. Then, the molded body is fitted into the bathtub and adhered, so that the inner surface of the bathtub can be formed of a beautiful thermoplastic resin molded body.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 3 are explanatory views of a method for repairing a bathtub according to an embodiment.

First, a compressed air or vacuum forming machine 2 is arranged above an existing bathtub 1. The compressed air or vacuum forming machine 2 is provided with a heater 3 horizontally, and a thermoplastic resin sheet 4 is stretched horizontally along the lower side of the heater 3. After the sheet 4 is pressed against the upper surface of the bathtub 1, the sheet 4 is heated to a predetermined temperature to be softened. Then, air pressure is applied to the upper surface of the sheet 4 or the sheet 4 and the bathtub 1
The sheet 4 is brought into close contact with the inner surface of the bathtub 1 by sucking air between the inner surface and the inner surface of the bathtub 1. Next, a portion of the periphery of the sheet 4 that protrudes excessively from the bathtub 1 is cut off with a cutter or the like. After the sheet 4 is cooled and hardened to form a molded body 5, the molded body 5 is removed from the bathtub 1. Next, preferably, the inner surface of the bathtub 1 is subjected to a base treatment such as washing, buffing or degreasing. The base treatment may be performed before the sheet 4 is cast.

Next, after an adhesive is adhered to the outer surface of the molded body 5 or the inner surface of the bathtub 1, the molded body 5 is fitted into the bathtub 1 and adhered to the bathtub 1. In addition, a glass mat may be attached to the inner surface of the bathtub 1 or the outer surface of the molded body 5 together with the application of the adhesive.

Thereafter, a finishing process such as trimming, pressing with a trowel, or caulking of the periphery of the molded body 5 is performed. Then, before or after this finishing treatment or concurrently therewith, the molded body 5 is cut off along the inner periphery of the drainage port 6 of the bathtub 1 to form a drainage port. In addition, this molded body 5
May be formed in advance before the molded body 5 is fitted into the bathtub 1.

In the present invention, the resin of the thermoplastic resin sheet is preferably one having at least a surface made of acryl. Acrylic single-layer sheet, acryl and other resin (for example, polystyrene (PS), high impact polystyrene (HIPS)) , Acrylonitrile styrene (AS),
Acrylonitrile butadiene styrene (ABS), acrylonitrile ethylene propylene styrene (AES))
Are preferred. The thickness of this sheet is 2-2
It is preferably about 0 mm, especially about 3 to 10 mm.

As the adhesive layer, urethane type, epoxy type,
Cold-setting adhesives such as polyester and acrylic can be used. Glass mat (# 45) to absorb gaps
It is preferable to use 0 ply together with one ply. In addition, as the adhesive, among the unsaturated polyester resin,
It is most preferable to use a vinyl ester based on heat resistance. After the adhesive is applied, it is preferable to fit the molded body into the existing bath by using a vacuum or the like so that air remains as little as possible.

As the molding machine 2, a simple type pneumatic or vacuum molding machine which is simple and portable is preferable.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, the dimensions of the existing bathtub 1 are measured in advance, and then the dimensions of the sheet 4 are determined. As the sheet 4, a 7 mm multilayer sheet of cast plate acrylic / ABS was used.

The sheet 4 is clamped at four sides of the simple pressurized or vacuum forming machine 2. The dimensions of the clamp are also adjusted according to the size of the bathtub. The molding machine 2 is set so as to cover the upper side of the bathtub, and the periphery of the sheet 4 is sealed with a rubber packing or the like.

The heater 3 of the molding machine 2 is turned on, and the sheet 4
Is heated to about 160 to 220 ° C. The heating conditions differ depending on the material, thickness, etc. of the sheet. In this case, the peripheral part was heated at about 200 ° C., and the central part was heated at about 180 ° C. and then molded. Thereafter, the sheet 4 was hardened by being cooled slightly, the clamp of the sheet 4 was released, and an extra portion of the periphery of the sheet 4 was removed with a cutter. After the sheet 4 was further cooled to form a molded body 5 having sufficient strength, the molded body 5 was removed. A cold-setting unsaturated polyester-based adhesive was adhered to the outer surface of the molded body 5 at a rate of about 400 g / m ² .
At this time, a glass mat of # 450 was attached to the outer surface of the molded body 5 at a rate of 450 g / m ² .

After buffing and degreasing the inner surface of the bathtub 1, the molded body 5 is fitted and left for 24 hours, and the molded body 5 and the bathtub 1 are adhered to each other.
Iron holding and caulking were performed. In addition, drain port is bathtub 1
It was formed by hollowing out along the inner surface of the drain port. As a result, a bathtub whose inner surface was formed of a beautiful acrylic material was formed.

[0019]

According to the present invention, an existing bathtub can be transformed into a glossy and extremely beautiful bathtub. In the present invention, it is possible to select the color and pattern of the sheet, and it is possible to make it the one desired by each household. The bathtub after renovation has excellent durability and can be used for a 24-hour bath.

The cost required for this repair method is extremely small, and the construction period is extremely short.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a method for repairing a bathtub according to an embodiment.

FIG. 2 is an explanatory diagram of a bathtub repair method according to the embodiment.

FIG. 3 is an explanatory view of a bathtub repair method according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bathtub 2 Molding machine 3 Heater 4 Sheet 5 Molded body 6 Drainage port

Claims (2)

[Claims] 1. A method for repairing an existing bath tub, wherein a step of forming a thermoplastic resin sheet along an inner surface of the bath tub using a compressed air or vacuum forming machine, and a step of removing a formed body from the bath tub A method of repairing a bath tub, comprising: forming an adhesive layer on the inner surface of the bathtub or the outer surface of the formed body; and fitting the formed body into the bathtub. 2. The method according to claim 1, wherein the thermoplastic resin sheet comprises a single layer or a plurality of layers, and at least the surface is made of acrylic.