JP2005169974A - Surface plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make weld marks 34 and 35 inconspicuous generated by a molten resin injected from a resin inlet 33 in a resin molded article manufactured by injection molding such as a surface plate 30 of an elevator instrument, surface plates of various controllers and the like. <P>SOLUTION: A pattern 40 is provided in a position where the weld marks 34 and 35 occur. Since the weld marks 34 and 35 are overlapped on the pattern 40, it is possible to make the weld marks 34 and 35 inconspicuous and give a design accent to the surface plate 30 which is liable to become monotonous. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a structure that makes a weld mark inconspicuous in resin molded products manufactured by injection molding, such as a surface plate of an elevator apparatus and a surface plate of various controllers.

  FIG. 2 is a view showing an example of a resin molded product by conventional injection molding. In the figure, reference numeral 10 denotes a resin molded product having a part mounting hole 11 for a switch or the like. When molten resin is injected from a resin injection port 13 into a mold for molding this shape, the resin flows as indicated by arrows. On the right side of the figure, the parts attachment hole 11 is bypassed and divided into arrows A and B, and weld marks 12 are generated by joining at the ends. When the weld mark 12 is generated, the appearance is deteriorated, which is not preferable for a product in which design is important, such as a surface plate of a device.

For this reason, a method has been considered in which the weld mark generation position is controlled so that the weld mark is not noticeable (see Patent Document 1). This prior art will be described with reference to FIG. 3. As in the case of FIG. 2, the resin molded product 1 has a component mounting hole 2, and the resin injected from the resin injection port 4 of the mold is indicated by arrows A and B. It flows like. 5 is a resin reservoir for controlling the flow of the arrow B, and 6 is an inlet thereof, which is provided obliquely so that a part C of the flow B can easily flow in immediately before the component mounting hole 2.
Accordingly, the flow B of the resin injected from the resin injection port 4 partially flows into the resin reservoir 5 as the flow C, so that the flow B decreases. Therefore, the weld mark 3 is generated at a position close to the resin injection port 4. When the molded product is taken out of the mold after cooling, the resin that has flowed into the resin reservoir 5 is also taken out at the same time as the molded product.

Thus, since the position of the weld mark 3 can be changed by providing the resin reservoir 5, the position of the weld mark 3 can be controlled by appropriately selecting the shape, the number, and the installation location of the resin reservoir 5. it can. Therefore, the design of the product can be prevented from deteriorating by moving the weld mark 3 to a position that is least noticeable.
Japanese Patent Laid-Open No. 7-52199

  In the prior art, the weld mark can be moved to a position where it is difficult to notice, but depending on the product, the weld mark may be noticeable no matter where it moves. For example, in the case of a surface plate 30 having two call button mounting holes 31 and 32 at the top and bottom of the center, such as a surface plate of an elevator hall controller shown in FIG. 4, a weld generated by resin injected from the resin injection port 33. Since the marks 34 and 35 are conspicuous wherever they occur, there is a problem that the technique cannot cope with them.

  The present invention is generated by injecting resin from a resin injection port in a surface plate manufactured by injecting resin from a resin injection port into a mold having a shape that branches the flow of the injected resin. A pattern is provided at the position of the weld mark.

  According to the present invention, since the weld mark and the pattern overlap, the weld mark becomes inconspicuous, and the design accent can be added to the surface plate that tends to be monotonous.

An embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram corresponding to FIG. 4, and the same number indicates the same thing. In the figure, reference numeral 40 denotes a stripe pattern, which is provided at a place where the weld marks 34 and 35 are generated. Reference numeral 40 a denotes a pattern provided for balancing with the pattern 40.
According to the present embodiment, since the weld marks 34 and 35 overlap with the pattern 40, the weld marks 34 and 35 are hardly noticeable, and the design of the surface plate 30 can be improved by the patterns 40 and 40a.

  In the above embodiment, the pattern 40 is a stripe, but it is needless to say that another pattern may be used. Moreover, although the resin injection port 33 was one place of the downward direction, even if it is another place and it is multiple places, it can implement similarly.

It is a figure which shows embodiment of this invention. It is a figure which shows an example of the conventional resin molded product. It is a figure which shows the other example of the conventional resin molded product. It is a figure which shows an example of the conventional surface plate.

Explanation of symbols

3, 12, 34, 35 Weld mark 4, 13, 33 Resin injection port 30 Surface plate 31, 32 Call button mounting hole 40, 40a Pattern

Claims (1)

In a surface plate manufactured by injecting resin from a resin injection port into a mold having an internal shape that branches the flow of injected resin,
A surface plate, wherein a pattern is provided at a position of a weld mark generated by injecting resin from the resin injection port.

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