JPH03264337A - Mold for forming bathtub - Google Patents

Abstract

PURPOSE:To make it possible to easily form a bathtub integrally with an apron part having the desired length by a constitution wherein the edge face forming surface of the vertical part of a split mold is positioned by the thickness of a spacer so as to determined the length of the apron part. CONSTITUTION:The mold for forming bathtub consists of a mold main body 1, a split mold 2 and a spacer 3, which is interposed between the body 1 and the mold 2. After title above-mentioned body 1, mold 2 and the spacer 3 are fixed together with a fixing means 4, releasant made of water soluble wax or the like is applied to the forming surface 6 of the recessed part of the mold main body 1, the forming surface 7 of its flange, the forming surface 9 of its apron and the edge face forming surface 17 provided on the split mold 2. Next, gelcoat resin is sprayed on the releasant, cooled and hardened and, after that, glass fibers and thermosetting resin are laminated onto the surface of gelcoat layer so as to harden by being heated in a curing oven in order to form FRP layer. After the finish of the setting of the thermosetting resin, mold stripping is performed by removing the fixed split mold 2 and the spacer 3 from the mold main body 1. Thus, a bathtub, in which a bathtub main body and an apron part are made into an integral body, is obtained. Further, by exchanging a spacer, the length of the apron part can be changed.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Industrial Field of Application The present invention relates to a bathtub mold used for forming a bathtub by the hand lay-up method, and particularly in which an apron portion and a bathtub body are integrally molded. This invention relates to a bathtub mold used for forming a bathtub.

B. Prior art Conventionally, for example, in a bathtub body installed in a unit bathroom, in order to ensure that water in the unit bathroom is completely drained, a flange portion formed on the bathtub body is connected to the unit. An apron is placed over the draining end of the waterproof pan that makes up the floor of the bathroom.

However, in recent years, in order to more reliably drain the water inside the unit bathroom, and to simplify the work process by omitting the process of installing an apron, the bathtub body and apron have been integrated into one body. A new bathtub has been proposed and is in use.

Therefore, a conventional bathtub mold used for forming a bathtub in which the bathtub body and apron are integrated will be briefly described below.

This bathtub mold has a mold body 100 as shown in FIG.
and a split mold 101, which are fixed by fixing means 102.

The mold body 100 includes a concave molding surface 103 for molding the bathtub body, a flange molding surface 104 for molding a flange portion provided around the bathtub body, and an apron portion for forming an apron portion hanging from the flange portion. A molding surface 105, a split mold mounting surface 106 extending orthogonally to the apron molding surface 105, and a fixing means engaging surface 107 are provided.

On the other hand, the split mold 101 is made of a plate-shaped body that is wider than the split mold mounting surface 106 of the mold body 100, and a part of the lower surface is formed by the split mold mounting surface 106 provided on the mold base 100.
The rest serves as a mounting surface 108 on which the apron is placed, and the remaining portion serves as an end surface forming surface 109 for forming the end surface of the apron portion.

By the way, even if the recesses and flange parts of the bathtub have the same shape, they may differ depending on the layout of the bathroom in which the bathtub is installed, the height of the waterproof pan that makes up the floor of the bathroom, etc. , some differ only in the length of the apron part.

When only the length of the apron part is different in this way, the apron part of the molded bathtub is cut to a predetermined length after the above process.

C6 Problem to be Solved by the Invention However, it is not necessarily easy to accurately cut the apron portion of the bathtub formed by the bathtub forming mold to a predetermined length. Moreover, the process of cutting the apron part not only impedes the speed of manufacturing the bathtub, but also causes peeling of the gel coat layer and FRP that have been applied to the bathtub at the cutting part, resulting in deterioration of quality.

In order to solve this problem, a plurality of mold bodies each having a different length for the apron molding part are prepared, and a bathtub is molded using the mold body corresponding to the apron part having a desired length. There are possible ways.

However, preparing multiple mold bodies that differ only in the length of the apron molding part increases costs, and each time a bathtub of the same shape that differs only in the length of the apron part is prepared, the mold bodies are Replacing the mold body with another mold body is inefficient and results in hindering the speed of work.

Therefore, the present invention was proposed to solve the above-mentioned conventional problems, and it is possible to easily obtain the desired shape without cutting the apron part of the molded bathtub or without replacing the mold body. The object of the present invention is to propose a bathtub forming mold capable of forming a bathtub in which the long apron portion is integrally bottomed.

The present invention has been proposed in order to achieve the above-mentioned object, and is a bathtub forming mold used for forming a bathtub by a hand lay-up method. A concave molding surface for molding the main body, a flange molding surface for molding a flange provided around the bathtub body, an apron molding surface for molding an apron portion hanging from the flange, and an apron molding surface running perpendicular to the apron molding surface. a mold body having a positioning surface, a horizontal portion having a horizontal surface parallel to the positioning surface, a vertical surface contacting the apron molding surface, and a vertical surface having an end molding surface that is perpendicular to the apron molding surface and regulating the end surface of the apron portion. The horizontal surface of the horizontal part of the split mold and the positioning surface of the mold body are in contact with each other via a spacer, and the thickness of the spacer allows the split mold to have a substantially L-shaped cross section. The end face molding surface of the vertical portion of the apron is positioned and the length of the apron portion is defined.

20 Effects According to the bathtub mold according to the present invention, the spacer interposed between the mold body and the split mold is appropriately replaced with one having a thickness corresponding to the length of the apron part of the bathtub to be molded. By doing so, it is possible to mold a bathtub in which the apron portion of a desired length is integrally shaped.

Furthermore, since the split mold constituting the present invention has an abbreviated cross-sectional shape, when it is fixed to the mold body with a spacer interposed between them, the vertical part of the split mold Positioning can be easily performed so that the surface and the apron molding surface provided on the mold body are in reliable contact with each other.

F. Examples Hereinafter, examples of the bathtub mold according to the present invention will be described in detail with reference to the drawings.

This bathtub mold is an application of the present invention to a type of mold in which the bottom shape of the bathtub is formed by laminating and curing glass fibers on the surface of the cutting mold, and the mold is removed from the core mold by lifting it upward. It is.

As shown in FIG. 1, this bathtub mold consists of a mold body l,
It consists of a split mold 2 and a spacer 3 interposed between the mold body 1 and the split mold 2, and is fixed by fixing means 4.

The mold body 1 is made of a metallic material such as an iron plate, and is formed to protrude upward from the upper surface of the rectangular seating portion 5, and has a concave molding surface 6 that forms the bottom shape of the bathtub body. , a flange molding surface 7 formed in a groove shape around the base end side of the recess molding surface 6 and forming a bottom shape of the flange provided around the bathtub body 1; An apron molding part 8 is provided which stands upwardly so as to face the recess molding surface 6 and the road surface with the flange molding surface 7 interposed therebetween. One side of the apron molding part 8 is an apron molding surface 9 that forms the bottom of the apron part suspended from the flange of the bathtub, and the upper end has an apron molding surface 9 projecting in a direction perpendicular to the apron molding surface 9. A positioning surface 110 is formed. The upper surface of this positioning surface section 10 is a positioning surface 11 that is perpendicular to the apron molding surface 9, and the lower surface is a contact surface 12 that the fixing means 4 abuts from below.

On the other hand, the split mold 2 is composed of a horizontal portion 14 and a vertical portion 15, and has a substantially L-shaped cross section.

The lower surface of the horizontal portion 14 is the positioning surface 1 of the mold body 1.
1 and the positioning surface 11
and the area between the road. In addition, the vertical portion 15
has a vertical surface 16 in contact with the apron molding surface 9, and an end molding surface 17 that runs perpendicularly to the apron molding surface 9 of the mold body 1 and regulates the end surface of the apron portion. Note that the width of this vertical portion 15 is made longer than at least the thickness of the spacer 3.

The mold body 1 and the split mold 2 described above are fixed by a fixing means 4 such as a vice, with a spacer 3 interposed therebetween, as shown in FIG.

This spacer 3 has a flat plate-like overall shape, and the thickness of this spacer 3 is determined according to the length of the apron portion that is shaped as a bottom.

Hereinafter, each step of forming the bottom of a bathtub in which the apron portion is integrally formed with the bathtub body using the bathtub mold configured as described above will be briefly described.

After the step of fixing the mold body 11 constructed as described above and the spacer 3 with the fixing means 4 as shown in FIG. 2, the recess forming surface 6. Flange molding surface 7° Apron molding surface 9 and split mold 2
A mold release agent made of water-soluble wax or the like is applied to the end surface forming surface 17 provided on the surface. Note that it is not necessary to apply this mold release agent every time, and it is sufficient to apply it approximately once every five times.

When this mold release agent application step is completed, a gel coat resin is then applied by spraying, and the resin is cooled and cured. This gel coat resin becomes the gel coat layer that forms the surface of the bathtub whose bottom is shaped.

Next, when the curing of the gel coat resin is completed, glass fibers and thermosetting resin are laminated on the surface of the gel coat layer, and this is heated in a curing furnace at a heating temperature of, for example, 5o''C to 60C, An FRP layer is formed by curing.

When the thermosetting resin is cured by the heating step, the split mold 2 and spacer 3 fixed by the fixing means 4 are removed from the mold body 1, and then the bottom-shaped bathtub is attached to the mold body 1. Remove from the mold by lifting upwards. As a result, a bathtub in which the bathtub body and the apron portion are integrated, and in which the apron portion having a desired length is provided, is obtained.

In addition, when molding bathtubs having apron portions of different lengths using the mold body 1 and split mold 2 used in the bathtub molding process described above, spacers 3 according to the lengths of the apron portions are used. You can use .

Note that the fixing means 4 constituting the present invention does not rely on a vise as in this embodiment, but instead holds the mold body 1 and the spacer 3.
and split mold 2 may have other configurations as long as they can be reliably fixed without causing positional displacement.

According to the bathtub mold having the above-described configuration, when molding bathtubs that differ only in the length of the apron part, the apron part having the required length can be formed by simply replacing the spacer 3 according to the length of the apron part. The formed bathtub can be molded.

Furthermore, since the split mold 2 has an oval cross-sectional shape, when it is fixed to the mold body with the spacer 3 interposed therebetween, the vertical portion 15 constituting the split mold 2 is Positioning can be easily performed so that the vertical surface 16 and the apron molding surface 9 provided on the mold body 1 are in reliable contact with each other, and workability can be greatly improved.

In addition, in the above embodiment, the spacer 3 used in the process of molding - pieces of bathtubs was explained as being composed of one member, but the spacer 3 constituting the present invention is made of a third
As shown in the figure, spacers 30, 3 having the same wall thickness
0.30 pieces (for example, 3 pieces) above mold body 1 and split mold 2
It may be interposed between.

G0 Effect of the Invention As is clear from the description of each of the above embodiments, according to the bathtub mold of the present invention, when bathtubs that differ only in the length of the apron portion are molded, the length of the apron portion to be molded is The length of the apron can be changed by simply replacing the spacer according to the length.

Therefore, not only can the process of cutting a part of the apron part after removing the mold from the mold be omitted, but also there is no need to prepare a plurality of molds corresponding to the length of the apron part.

Furthermore, since the split mold constituting the present invention has an abbreviated cross-sectional shape, when it is fixed to the mold body with the spacer interposed therebetween, the vertical portions constituting the split mold are Positioning can be easily performed so that the vertical surface and the apron molding surface provided on the mold body are in reliable contact with each other, and workability can be greatly improved.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing the external appearance of the 2-part mold body, spacer, and fixing means constituting the present invention, and Fig. 2 is a vertical cross-sectional view showing the 1-part mold body and the spacer fixed state by the fixing means. be. FIG. 3 is a side view showing another embodiment. FIG. 4 is a longitudinal sectional view showing a conventional bathtub mold.・Concave molding surface ・Flange molding layer ・Apron molding surface ・Positioning surface ・Horizontal part ・Vertical part ・Vertical surface ・End face molding surface

Claims (1)

[Claims] A bathtub mold used for forming a bathtub by the hand lay-up method, comprising: a concave forming surface for forming a bathtub body; and a flange for forming a flange provided around the bathtub body. a mold body having a molding surface, an apron molding surface for molding an apron portion suspended from the flange portion, and a positioning surface perpendicular to the apron molding surface; a horizontal portion having a horizontal surface parallel to the positioning surface; a split mold having a substantially L-shaped cross section, comprising a vertical surface in contact with the apron molding surface and a vertical portion having an end surface molding surface that is perpendicular to the apron molding surface and regulating the end surface of the apron portion; Bathtub molding in which the horizontal surface of the horizontal part and the positioning surface of the mold body are in contact with each other via a spacer, and the thickness of the spacer positions the end face molding surface of the vertical part of the split mold and defines the length of the apron part. Type.