JPH0535255U - Resin molded product - Google Patents

Abstract

(57) [Summary] [Purpose] When manufacturing resin molded products such as bathtubs,
By not requiring the hand lay-up method, the production is facilitated and the time is shortened, thereby improving the production efficiency. [Structure] When the outer shell holding layer 1 which is the core of the layered structure is formed of resin concrete, reinforcing materials such as glass fibers are adhered to the back surface portion, and this portion is lined with a backing layer. It was set to 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to resin molded products such as bathtubs, counters, building materials, toilet seats and toilet lids.

[0002]

[Prior Art]

 Some resin moldings, such as bathtubs, have a deep color tone that gives them the appearance of marble. The layer structure of this kind of resin molded product is basically the outer layer holding layer formed by resin concrete in a similar shape to the molded item, and the surface side resin layer provided so as to sandwich the outer layer holding layer from both front and back sides. And a resin layer on the back side. Further, a thinner protective coating layer may be provided on the surface side resin layer. Since the protective coating layer, the front surface side resin layer and the outer peripheral holding layer were transparent or semi-transparent, the background color due to the back side resin layer was blurred by each of these layers, which gave the viewer a sense of depth. It had been awakening.

In order to manufacture a resin molded product having the above-mentioned layered structure, first, a female mold corresponding to the outer shape of the molded product is used, and a predetermined process is carried out by a hand lay-up method or a pressing method. A backside resin layer having a shape is formed in advance. Then, the back surface side resin layer is fitted into the concave molding surface of the female mold. Next, a gel coat layer (which will later become a protective coating layer) is applied and formed on the convex molding surface of the male mold corresponding to the female mold, and then the material resin for the surface side resin layer is hand laid up. Laminated by a method. Then, the resin concrete for the outer shell holding layer is poured into a molding recess formed by combining the male and female molds, and the curing is waited for. On the other hand, there is also a method in which the protective coating layer, the front surface side resin layer and the outer shell holding layer are first press-molded, and then the back surface side resin layer is formed on the outer surface of the outer shell holding layer by the hand lay-up method.

[0004]

[Problems to be Solved by the Invention] In order to form the front surface side resin layer and the back surface side resin layer, the hand layup method has been adopted as described above. However, this method is extremely time-consuming and time-consuming due to the fact that bubbles tend to be entrained in the glass fibers that are mixed as a reinforcing material in the material resin of each resin layer, and deaeration work is required. It took a long time. In this way, the work involved in the hand lay-up method has a great adverse effect on the production efficiency of resin molded products.

The present invention has been made in view of the above circumstances, and it is possible to prevent the difficulty and the work time from being associated with the hand lay-up method, and to significantly improve the production efficiency. , And to provide a new resin molded product (hereinafter referred to as the molded product of the present invention).

[0006]

[Means for Solving the Problems]

 The gist of the molded product of the present invention is that in resin molded products such as bathtubs, counters, and building materials, an outer retaining layer made of resin concrete that retains the shape of the molded product is used to reinforce part of the outer retaining layer with glass fiber or the like. It is reinforced by a backing layer that is made to penetrate the material.

[0007]

[Action]

 On the back side of the outer layer holding layer, there is a backing layer made of resin fiber and a reinforcing material solidified with resin concrete, so there is no need to provide a back-up layer (for example, back side resin layer). .. Therefore, the work involved in the hand layup method can be omitted. In order to form the backing layer, it is only necessary to attach a reinforcing material such as glass fiber to the back side of the resin concrete (uncured state) that forms the outer shell holding layer. , Very easy.

[0008]

【Example】

 The present invention will be described below with reference to the drawings showing an embodiment thereof. FIG. 1 is an enlarged cross-sectional view of a main part showing a layered structure of a molded product of the present invention. The molded article of the present invention is formed by an outer shell retaining layer 1 which is the core of the layer structure and a backing layer 2 provided on the back surface side (lower surface side in the figure) of the outer shell retaining layer 1.

The backing layer 2 is made of resin concrete and solidified reinforcing materials 3, 3 ,. A part of the resin concrete forming the outer shell holding layer 1 is applied to the resin concrete forming the backing layer 2. That is, when the outer shell holding layer 1 is formed, if the reinforcing materials 3, 3, ... Are adhered to the required places before the resin concrete is hardened, the reinforcing materials 3, 3 ,. On the other hand, a part of the resin concrete penetrates and hardens. This portion becomes the backing layer 2.

The resin concrete forming the outer shell holding layer 1 is transparent or translucent (colored and transparent), and the layer thickness thereof is about 5 mm except for the portion which becomes the backing layer 2. A pattern (not shown) having a flow piece shape, a cotton shape, or a spot shape can be provided inside the outer shell holding layer 1 depending on a desired color. In this example, the outer cover layer 1 was provided with a protective coating layer (gel coat layer) 4 on the surface side (upper surface side in the figure).

Next, the manufacturing situation of the molded article of the present invention will be described based on FIG. 2 showing the case where it is a bath. First, the reinforcing materials 3, 3, ... Are arranged along the inner surface of the concave molding surface of the female die 5 corresponding to the outer shape of the molded product. The reinforcing materials 3, 3, ... Are easy to dispose and are convenient when they are made into a glass mat or a glass cloth. Then, a gel coat layer (later protective coating layer 4) is applied and formed on the convex molding surface of the male mold 6 corresponding to the female mold 5 as needed, and at the same time, an outer shell is formed inside the female mold 5. Resin concrete 7 to be the holding layer 1 and the backing layer 2 is poured, and the male and female molds 5 and 6 are combined. In this combined state, the resin concrete 7 is allowed to cure with or without predetermined pressurization and heating, and after curing, the male and female molds 5 and 6 are released and released to obtain the molded product of the present invention.

As described above, the layered structure adopted in the molded article of the present invention is not limited to bathtubs, and can be applied to all articles made of resin materials such as counters, building materials, toilet seats and toilet lids. .. If the surface of the outer shell holding layer 1 can be shaped into a smooth surface that is comfortable to the touch, it is not necessary to provide the above-mentioned protective coating layer 4 or the like. It is also possible to color the glass fiber used as the reinforcing material 3. As described above, the detailed configuration and shape of the molded article of the present invention can be appropriately changed according to the embodiment.

[0013]

[Effect of the device]

 As is clear from the above description, according to the resin molded product of the present invention, when the outer shell holding layer is formed, the backing side of the outer shell holding layer is simply attached to the back surface side of the outer shell holding layer. A layer can be formed. That is, since the back surface side resin layer and the like required in the conventional layered structure are not necessary, the work involved in the hand layup method can be omitted. Therefore, the manufacturing work of the resin molded product is facilitated and the working time is shortened. Therefore, it has a number of excellent advantages such that the production efficiency as a resin molded product can be remarkably increased.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing a layer structure of a molded product of the present invention.

FIG. 2 is a side sectional view showing a manufacturing state of the molded article of the present invention.

[Explanation of symbols]

1 ... Outer shell holding layer 2 ... Backing layer 3 ... Reinforcing material 4
… Protective coating layer 5… Female type 6… Male type 7… Resin concrete

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Claims (1)

[Scope of utility model registration request] 1. In a resin molded product such as a bathtub, a counter, and a building material, an outer shell retaining layer made of resin concrete that retains the shape of the molded product is made to penetrate a part of the outer shell retaining layer into a reinforcing material such as glass fiber. A resin molded product characterized in that it is reinforced by a backing layer consisting of