JPS58148732A - Manufacture of artificial marble bath-tub - Google Patents

Abstract

PURPOSE:To obtain an artificial marble bath-tub by a method wherein a thin film of transparent resin is provided on the surface of a male mold, colorless and colored bases are provided on the film in the form of a cup, white pigment is put on the colorless base, brown stiring material is fitted in the form of a craze, the film is coated with white back material, the female mold is put on the film, foams are removed and the resin film is cured. CONSTITUTION:A thin film 2 of transparent resin is provided on the molding surface 4A of a bottom force A on which colorless base 3, light brown base 4, green base 5 are arranged in the form of a cup. White pigment 6 is piled up partially on the colorless base 3, moreover, the bases 3, 4, 5 are arranged suitably in the form of a cup, then, brown string material 7 creating brown crazes peculiar to marble is inserted forcedly. The film is coated uniformly with white back material 8 and a top force A' is put on the thin film and cured. Then, the top force A' is removed. A leg material 9 is stuck-firmly to the bottom part 1' of the bath tub main. Pressure air is sent between the material and the bottom force A through the air supplying hole 3A. Thus, it is possible to obtain artificial marble bath-tub with nice appearance.

Description

[Detailed description of the invention] The present invention relates to a method for manufacturing an artificial marble bathtub.

Conventionally, when expressing a marble pattern on the surface of a reinforced plastic substrate, even if a synthetic resin sheet or leather printed with a marble pattern can be adhered to a flat surface, wrinkles etc. may occur when adhering it to a curved surface. However, it was impossible to create a marble pattern on the entire inner surface of a reinforced plastic bathtub.

Therefore, the present invention provides an artificial marble bathtub having a marble pattern that approximates as much as possible the natural pattern of marble, exhibits a three-dimensional beauty, and does not lose its aesthetic sense even on curved surfaces. Another object of the present invention is to provide an artificial marble bathtub which improves the demoldability of the bathtub body and which prevents plastic deformation of the bathtub body when air is pumped during demolding.

Embodiments of the present invention will be described below based on the drawings.

When molding artificial marble bath 1 (E), generally the male mold for molding the bathtub (A) and the female mold for molding the bathtub (A7 and the female mold for molding the bathtub C) are inverted. A convex part (1 person) is provided protrudingly, and its lower periphery l) +)
An air outlet hole (3A) is provided at the bottom.

A transparent resin thin film (2) made of synthetic resin, FRP, etc. is then formed on the mold release agent of the molding surface (4A) of the male mold, and a colorless base material (3) and a light brown base material (4) are formed on top of the transparent resin film (2). , green base material (5)
Arrange them in a pile as appropriate.

Each of these eight base materials (3) (4) (5)
It is produced by mixing the two parts, adding a curing agent, adding appropriate pigments, stirring and mixing in a vacuum state, and defoaming the air bubbles in the base material.

After that, add or do not add white pigment (6
) is partially electrically installed on the colorless substrate (3), and then (3) (
4) Arrange (5) in a heaped shape as appropriate, and insert brown strips (7) that form brown crack strips unique to marble in an interstitial shape.

This brown strip material (7) is produced by mixing 2.5 parts of glass powder with 1 part of unsaturated polyester resin, mixing a little hardening agent and brown pigment, and stirring the mixture.

After that, a white backing material (8) made by mixing 1 part of unsaturated polyester resin, 2 parts of glass powder, a small amount of curing agent, and white pigment and defoaming in vacuum is applied uniformly to the surface of the male mold (A). The side slope (2) (3) (4) (5
) (6) (7) Defoaming the air bubbles in (g) and allowing it to harden naturally.

Legs (9) are fixed to the outer surface of the bottom (1) of the bathtub body (1) from which only the naturally hardened ridge female mold (AY is removed and sprayed).

The leg materials (9) are mainly square timbers (?
1) It is arranged so as to protrude from the bottom area and is fixed to the resin layer of FRP via the resin layer.

Then compressed air is supplied to the material through the air outlet hole (5A-).
2) (3) (4) (5 n (6) (7) (7) Release the feeding bathtub body (1) between the 8 n and the S type (A).

At this time, a force acts that deforms the bottom (IY) of the bathtub body (1) into a bulging shape, but since the leg members (9) are arranged and fixed, no bulging deformation occurs.

Then, attach the leg material (9) that protrudes from the bottom part (ly area) to the handheld part (
As 9b), the artificial marble bathtub (B) having a three-dimensional pattern similar to marble is manufactured by lifting it upward and demolding it.

Since the present invention is configured as described above, it has the following advantages.

■ We can provide an artificial marble bathtub that has a three-dimensional external beauty that expresses a pattern that is completely similar to a real marble pattern, and that is luxurious and can enhance the product value.

■ Release the female mold and pressurize the bathtub body to #i by pumping air.
When the bathtub is released from the mold, air pressure is generated that causes the bottom of the bathtub to bulge upward and plastically deform, but the legs prevent this deformation, so a bathtub with a curved bottom is manufactured. It can be manufactured with high precision.

(2) Since the leg portions protruding from the bottom area of the bathtub body can be used as lifting parts when demolding from the male mold 5-, workability during demolding can be improved.

Therefore, the desired purpose can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a bathtub manufactured using the method for manufacturing an artificial marble bathtub of the present invention, FIG. 2 is a partially enlarged sectional view of the same bathtub,
Figures 8 to 6 are longitudinal sectional front views showing the manufacturing process of the same bathtub. In the figure, (A) (A)': Male and female molds for bathtub molding (1): Bathtub body (2): Transparent resin thin film (3): Colorless base material (4)
): Light brown base material (5): Green base material (i):
White pigment (7): Brown strip material (8): White backing material (9): Leg material C- 帥 0"2 Ui 甫+: l-L' mu (Special W1 Office Examiner) 1.1 1 Display Showa 5 [Special ¥I Ml No. 30990 ShiJ
2 ・Title of the invention Method for manufacturing a bathtub by one person, '3. What is the relationship between Koji I'1 and the amendment? Person's name (Name) <AO8) Totoki Co., Ltd. 14 Agent A) Address: 114-7 Yumi 5, 11151 Haku, Bunkyo-ku, Tokyo, Suppl. 1 [Order Day 1 (Voluntary Supplement 1F)

Claims (1)

[Claims] A transparent resin film layer is formed over the entire surface of the male mold for bathtub molding, and base materials of several different colors prepared by mixing and defoaming 1 to 4 parts of glass powder to 71 parts of the transparent resin are respectively coated with the transparent reinforced plastic film. The layer is arranged at appropriate points in a heaped manner on the upper surface of the layer, and a thin white pigment is partially overlaid on the upper surface of the entire base material, and furthermore, the base materials of the several types of colors are arranged at appropriate points on top of this, For every page of all base materials, add 1 part of white resin to 1 part of filler such as glass powder.
~ 4 parts mixed and defoamed white backing material is applied, followed by colored strip material in the form of cracks between the base materials! After the I-injection, a female mold for molding a bathtub is fitted from above, and both molds for molding a bathtub are vibrated to defoam, and after being left to harden naturally, the female mold is released, and then inside the male mold. A method for producing an artificial marble bathtub in which a pattern similar to a marble pattern is three-dimensionally expressed on the inner surface of the bathtub body by pressurizing air and demolding the male mold, the method comprising:
A method for manufacturing an artificial marble bathtub, which comprises a step of fixing leg members having both ends protruding from the bottom area on the outer surface of the bottom of the bathtub body between the female mold releasing step and the air pressure feeding step.