JPS6121214Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a mold for molding.

Recently, various molded products made of resin concrete have come onto the market. Such molded products are generally molded using a press-type molding mold consisting of a male mold and a female mold, since the resin concrete used as the material has poor fluidity.

By the way, in order to give roundness to the edges of the resulting molded product, such a molding die has an edge molding protrusion 1' having a concave curved surface 13' as shown in FIG. 5 in a male mold A. However, in the male mold A provided with such a protrusion 1', the tip of the protrusion 1', which is sharp like a cutting edge, may break due to the pressure during press molding. There was a problem that it was not practical because it wore out in a short period of time, so it was not very durable. In order to prevent a decrease in durability, the protruding strip 1' can be cut off as shown by the dotted line in the figure to create a normal cutting structure, but in that case, the edges of the resulting molded product will be sharp. They all have their advantages and disadvantages, as they have the disadvantage of being angular and unpleasant to the touch.

The present invention was made in view of the above circumstances, and aims to provide a molding die that can produce molded products with edges that are pleasant to the touch, and that is also highly durable. be.

Hereinafter, the molding die of the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a cross-sectional view of an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of essential parts of the same embodiment.

That is, the molding die of the present invention, as shown in FIG. It is characterized in that the molding protrusion 1 is provided at the cutting portion of the male mold A and the female mold B.

The convex strip 1 for edge forming, which is a feature of the present invention, has a second
As shown in the figure, a sliding surface 11 capable of slidingly contacting the inner surface B ₁ of the female mold B, a convex curved surface 12 that extends inward to the male mold A connected to this plane 11, and this convex curved surface 12
A concave curved surface 13 that extends further inward to the male mold A.
This convex curved surface 12 and concave curved surface 13
It has a nice texture because it draws a continuous smooth curve. In particular, if the relationship between the width w from the boundary between the convex curved surface 12 and the concave curved surface 13 to the sliding surface 11 and the height n of the convex strip is w≦h, then the height h of the convex strip If it is larger than the width w, the edge will be three-dimensional and the wall thickness will appear larger than it actually is. If w≦h, the curvature of the convex curved surface becomes small, and the resulting molded product becomes substantially the same as that of the straight cutting structure of the passage as shown by the dotted line in FIG. The edges will be rough and have an unpleasant texture. There are no particular restrictions on the specific values of the width w and height h, and they can be determined as appropriate depending on the dimensions of the molded product to be obtained, such as the wall thickness, but rounded edges with a good texture can be used. In order to obtain a protruding strip 1 that can be molded and has sufficient strength and durability, it is desirable to set the width w to be approximately 2 to 6 mm and the height h to be approximately 2 to 10 mm.

Further, in this edge forming protrusion 1, the convex curved surface 12 and the concave curved surface 13 are connected to form a smooth wave surface, and the inclination angle θ ₁ of the upwardly expanding inclined tangent line l at the boundary between the two is approximately 30 to 30. The angle θ ₂ between the convex curved surface 12 and the sliding plane 11 is set within a range of 90 degrees.
is set to be in the range of approximately 50 to 90 degrees. When the angle of inclination and the angle of incidence are within this range,
The strength and durability of the ridges 1 are further improved, and the edges of the resulting molded product also have a very good texture.

In addition, as shown in FIG. 3, such an edge molding protrusion 1 can be attached separately from the male mold A so as to be detachable and replaceable. In this case, due to long-term use, the protrusions 1 may wear out,
Even if damage occurs, it is only necessary to replace the protrusion 1, and there is no need to replace the entire male mold A, which is economically advantageous.

Figure 4 shows that using the molding mold of the present invention with the above-mentioned configuration, the female mold B is filled with a predetermined amount of resin concrete material in the same way as a conventional press mold, and the male mold is heated. This shows a sink made of resin concrete formed by pressing A, and as shown in the figure, this sink has an opening upper edge C having a rounded step C ₁ on the outer periphery, and is easy to carry. The texture is very good. Moreover, by providing such a stepped portion C ₁ , there is a visual effect such that the width of the upper edge C of the opening appears larger than the actual size, and the wall thickness also appears larger due to the three-dimensional effect. ₁ also serves as a design accent, so it has a very good aesthetic appearance.

As described above, the molding mold of the present invention does not impair the durability of the mold itself by providing the male mold A with a specific protrusion 1 for edge molding that does not have a sharp cutting edge. Moreover, it has become possible to obtain a molded product with rounded edges that have a good texture, and the molded product obtained from the molding mold of the present invention is visually and aesthetically pleasing. It has excellent benefits and is extremely useful.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of one embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main part of the same embodiment, Fig. 3 is an enlarged sectional view of the main part of another embodiment of the invention, and Fig. 4 is an enlarged sectional view of the main part of the same embodiment. FIG. 5 is a perspective view showing the first part of a resin concrete sink molded with the molding mold of the present invention, and FIG. 5 is a partial sectional view of a conventional molding mold. Explanation of main symbols in the drawings, A...male mold, B...
Female mold, B ₁ ... Inner surface, 1... Convex strip for edge molding,
11... Sliding plane, 12... Convex curved surface, 13... Concave curved surface, w... Width, h... Height.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A molding die consisting of a male mold A and a female mold B provided with a protruding strip 1 for edge molding, the protruding strip 1 for edge molding comprising: A sliding surface 11 capable of slidingly contacting the inner surface _B1 of the female mold B, a convex curved surface 12 connected to this flat surface 11 and extending inward to the male mold A, and a further male mold connected to the convex curved surface 12. A: A molding die having a concave curved surface 13 extending inward. 2. A utility model registration request that is configured such that the relationship between the width w from the boundary between the convex curved surface 12 and the concave curved surface 13 to the sliding plane 11 and the height h of the convex strip 1 satisfies w≦h. The molding die according to item 1.