JPH04804B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a flow-patterned artificial marble molded article having an elevation, and particularly relates to the production method in which disturbance of the pattern on the elevation is prevented. be.

[Prior Art] Artificial marble moldings having a flow pattern are usually
The molding material is put into a hopper having a slit-shaped supply port, and the molding material is continuously dropped onto the mold surface through the slit-shaped supply port, and after the molding material is spread over the entire surface of the mold, it is cured. It is manufactured in this way. The molding material used is a base color compound with a pattern compound dispersed therein.

By the way, when the artificial marble molded article has an elevated portion, a groove is provided in the mold, and the molding material is poured into this groove as well.

For example, FIG. 7 is a perspective view of a counter having a rising portion 1a.
b is an elevation. A molded article 1 having such an elevated surface is manufactured using a mold 2 having a groove 2a for forming a rising portion 1a, as shown in FIG. In this case, the hopper 3 having a slit-shaped supply port for casting into the groove 2a is
Change the direction in the longitudinal direction of the groove part 2a.
is moved in the longitudinal direction, and the molding material 4 is continuously dropped into the groove 2a from the slit-shaped supply port,
Fill. After filling the groove 2a with the molding material, the molding material is supplied onto the horizontal portion 2c. In this case, the hopper 3 is
The direction of the hopper 3 is changed and the hopper 3 is moved in a direction perpendicular to the slit-shaped supply port.

Another conventional method for manufacturing flow-patterned artificial marble moldings with vertical surfaces is to prepare a mold with horizontal and vertical mold surfaces, first supply a thick layer of material onto the horizontal surface, and then apply a thin layer onto the mold surface. Scrape off the excess molding material so that it remains, semi-cure the remaining thin molding material, and then rotate the mold 90 degrees to supply molding material to the remaining molding parts and harden the molding material. There is a way to do it. (For example, JP-A-60-67108,
67109).

[Problems to be Solved by the Invention] In the conventional manufacturing method shown in FIG. 8, there is a problem in that the pattern on the vertical portion tends to be disordered. That is, when casting the molding material into the groove 2a as shown in FIG. 8, in the conventional method, the hopper 3 is positioned above the groove 2a as shown in FIG. The material 4 is poured into the mold for casting. In such a casting method, the molding material 4 drips down along the inner wall surfaces 2b, 2d of the groove portion 2a or adheres to the inner wall surfaces 2b, 2d. Therefore, the vertical surface 1b of the molded product formed by the groove inner wall surface 2b has a so-called sagging pattern in which the flow pattern is inclined from the horizontal direction or the pattern is blurred.

According to the above-mentioned other conventional method, the material is supplied in a thick layer onto a horizontal mold surface, then scraped off to leave a thin layer, and after semi-curing, the mold is rotated 90 degrees. Disturbances in the flow pattern on such vertical surfaces can be prevented to some extent. However, in this scraping method, the molding process is extremely complicated and the manufacturing efficiency is extremely low. Furthermore, in this scraping method, if there is a curved part on the mold surface, if the molding material is supplied thickly, the thick molding material will flow along the curved surface, resulting in a disordered pattern. There is a problem that it becomes impossible to obtain a molded product without .

[Means for Solving the Problems] The method for manufacturing a flow-patterned artificial marble molded product having an elevational surface according to the present invention, when pouring a molding material into a mold having a horizontal part and a groove part, the inner width of the groove is 0.5 to 0. Insert the tip of a nozzle with a tip width of 0.7 times into the groove,
Molding into the groove is performed by scanning the nozzle multiple times in the longitudinal direction of the groove without contacting the inner wall surface of the groove.

[Function] According to the manufacturing method of the present invention, the nozzle is inserted into the groove, and the nozzle is maintained in a non-contact state with the inner wall surface of the groove. Therefore, the molding material supplied from the nozzle tip does not drip down while adhering to the inner wall surface of the groove, and the flow pattern is prevented from being disturbed due to this. Further, since the width of the nozzle is set to be considerably larger than the width of the groove, the distance through which the material supplied from the tip of the nozzle flows in the width direction of the groove is extremely short. Therefore, disturbance of the pattern caused by the flow of material in the groove width direction is also prevented.

In addition, in the present invention, since casting is performed by moving the nozzle multiple times along the longitudinal direction of the groove, the amount of material supplied per scan can be reduced, and a narrow and clear pattern can be formed.

[Examples] The present invention will be described in further detail below with reference to examples shown in the drawings.

FIG. 1 is a perspective view showing an example method of the present invention, and FIGS. 2 and 3 are sectional views thereof. Reference numeral 2 denotes a mold, which has a horizontal portion 2c and a groove portion 2a, and is used to mold the counter-shaped molded product 1 shown in FIG. Note that, as described above, the inner wall surface 2 of the groove portion 2a
b is the molding surface of the vertical surface 1b which is the front surface of the rising portion 1a.

A nozzle 5 is used to cast the molding material 4 into the groove 2a. This nozzle 5 has a tip width d that is 0.5 to 0.7 times the inner width D of the groove 2a. The tip of the nozzle 5 is inserted into the groove 2a, and is scanned multiple times in the longitudinal direction of the groove 2a while avoiding contact with the inner wall 2b of the groove, thereby laminating the molding material 4 in multiple layers. It is cast inside.

After the nozzle 5 has finished pouring into the groove 2a, the molding material is poured into the horizontal part 2c using a hopper 3 having a slit-shaped supply port shown in FIG.

According to the method of the present invention, the tip of the nozzle 5 is inserted into the groove 2a and cast without contacting the groove inner wall 2b, so that the material supplied from the nozzle 5 is poured along the groove inner wall surface 2b. It does not fall off when it is attached. Further, since the tip width d of the nozzle 5 is set to be 0.5 to 0.7 times the inner width D of the groove portion 2a, the flow distance of the material supplied from the tip of the nozzle 5 in the groove width direction is short. From such a thing,
The flow pattern on the elevation 1b becomes completely horizontal, and the boundaries of the pattern become clear.

Furthermore, in the method of the present invention, since the material is supplied into the groove 2a in multiple steps, the thickness of the material formed by one scan is small, and the flow pattern on the vertical surface 1b is extremely narrow. Become something.

FIG. 4 is a sectional view showing another manufacturing method of the present invention. The manufacturing method shown in FIG. 4 is for manufacturing a molded article 1 having a front sagging portion 1c as shown in FIG. In the manufacturing method shown in FIG. 4, a molding material is poured into the groove 2a of the mold 2 (not shown in FIG. 4) according to the method shown in FIGS. A molding material 4 is cast using a hopper 3. Then, a male mold 7 is fitted along the outer edge 6 of the mold 2 to form the front hanging part 1c,
A groove 8 is formed between the outer edge 6 and the male mold 7. Then, the tip of the nozzle 5 is inserted into the groove 8, and the molding material 4 is poured into the groove 8 in the same manner as in FIGS. 1 to 3. According to the method shown in FIG. 4, the flow pattern of the front droop portion 1c becomes completely horizontal and clear.

In addition, according to the method shown in FIG. 4, it is possible to manufacture a molded product 1 in which the front edge side of the counter is curved as shown in FIG. 6, and the flow pattern of the curved portion 1d is completely horizontal and clear. .

In the present invention, the nozzle tip width is set to 0.5 of the groove inner width.
The reason why the ratio is set to ~0.7 is that if this ratio is smaller than 0.5, the distance that the molding material supplied into the groove flows in the groove width direction becomes large, and the flow pattern on the vertical surface is likely to be disturbed. Moreover, when it exceeds 0.7, the nozzle tip tends to hit the inner wall surface of the groove. When the nozzle tip contacts the groove inner wall surface in this manner, the material supplied from the nozzle tip adheres to the groove inner wall surface and drips down, and the flow pattern on the vertical surface becomes disordered.

Note that the illustrated molding method and molded product are examples of the present invention, and the present invention can be applied to methods of manufacturing artificial marble molded products of various shapes other than those illustrated.

[Effects] As described above, according to the method of the present invention, the flow pattern in the vertical part is completely horizontal and extremely clear,
Furthermore, it is possible to produce an artificial marble molded product with a narrow pattern width and excellent design. Further, according to the method of the present invention, molded products having curved surfaces can also be manufactured without disturbing the flow pattern.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the method of the present invention;
2 and 3 are sectional views of the same, FIG. 4 is a sectional view showing another example method, 5, 6 and 7 are perspective views of the molded product, and 8 is a conventional method. A perspective view for explaining an example, and FIG. 9 is a sectional view of the same. 1...Molded product, 2...Mold, 2a...Groove, 3...
Hopper, 4... Molding material, 5... Nozzle, 7...
...Male type, 8...Groove.

Claims (1)

[Scope of Claims] 1. A method for manufacturing a flow-patterned artificial marble molded article having an vertical surface, which includes a step of continuously dropping a molding material for molding a flow-patterned artificial marble into a mold having a horizontal part and a groove part, Insert the tip of a nozzle having a tip width 0.5 to 0.7 times the groove inner width into the groove, and scan the nozzle multiple times in the longitudinal direction of the groove without contacting the inner wall surface of the groove to form the shape in the groove. A method for manufacturing a flow-patterned artificial marble molded article having an elevation, which comprises casting a material.