Synthetic resin forming product and producing method thereof

A technology of synthetic resin and manufacturing method, which can be applied to other household appliances, household components, lighting and heating equipment, etc., can solve the problems of expensive molds, etc., and achieve the effect of reducing the number of processes, reducing costs, and overall beauty

Active Publication Date: 2008-10-22
SAKAIYA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the molding method described in this document, a synthetic resin plate is provided on the side of the tunnel gate, and when holes are provided on the synthetic resin plate, a sliding core is used to prevent the molten resin from flowing to the back of the synthetic resin plate. A synthetic resin plate needs to be embedded in it, so there is a disadvantage that the mold is expensive

Method used

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  • Synthetic resin forming product and producing method thereof
  • Synthetic resin forming product and producing method thereof
  • Synthetic resin forming product and producing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as figure 1 , 2 As shown, a small-diameter hole for inserting a rotating shaft 6 for a meter pointer is formed in the center of the synthetic resin plate 2 provided on the front of the panel for an automobile speedometer shown as the synthetic resin molded product 1 of this embodiment. 4, and form a scale and a numerical value 7 around it, and then form a window 8 for the odometer at the bottom.

[0046] In addition, the above-mentioned small-diameter hole 4 is formed in the center of the synthetic resin plate 2 , and a large-diameter hole 5 larger than the small-diameter hole 4 is formed in the center of the synthetic resin molded part 3 corresponding to the formation portion of the small-diameter hole 4 .

[0047] Such as figure 2 As shown, the inner diameters of the small-diameter hole 4 of the synthetic resin plate 2 and the large-diameter hole 5 of the synthetic resin molding part 3 are different because the rotating shaft 6 of the instrument pointer is ins...

Embodiment 2

[0069] Such as Figure 7 , Figure 8 As shown, the synthetic resin molded product 1 of this embodiment is suitable for, for example, a panel for an automobile speedometer, and a small-diameter hole for inserting a rotating shaft 6 for a meter pointer is formed at the center of the synthetic resin plate 2 constituting the surface. 4. Scale and numerical value 7 are formed around it, and a window 8 etc. for the odometer is formed at the lower part. The above points are the same as those of the above-mentioned embodiment.

[0070] However, in this embodiment, the outer periphery of the synthetic resin plate 2 is previously extruded and punched so that it does not have the surrounding non-molded portion 13 as in the above-mentioned embodiment, and on the outer periphery of the synthetic resin molded product 1 The shape 2a is molded in a state where the synthetic resin plate 2 is covered on the side.

[0071] In addition, if Figure 9 As shown, in this manufacturing method, the ...

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Abstract

To provide a highly precise synthetic resin molded product having a large diameter hole at the same axial position as the small diameter hole formed to a synthetic resin sheet and causing no unequal shift in the pattern or another design applied to the synthetic resin sheet for the purpose of decoration, and its manufacturing method. The synthetic resin molded product has the synthetic resin sheet applied to a part or the whole of the surface and end surface thereof for the purpose of decoration. In a state that the small diameter hole 4 of the synthetic resin sheet 2 is fitted to the outer periphery of the projection of the sprue bush 16 provided to a fixed mold 15, the synthetic resin sheet 2 is mounted between the fixed mold 15 and a movable mold 17 and the large diameter hole forming part 19 positioned around the small diameter hole 4 of the synthetic resin sheet 2 to form a hole larger than the small diameter hole is formed to the movable mold 17. A molten resin 24 is injected in the mold having a predetermined shape formed around the large diameter hole forming part 19 through a plurality of the tunnel gate 21 allowed to communicate with the sprue bush 16 to form the large diameter hole 5.

Description

technical field [0001] The present invention relates to a synthetic resin molded product which is used as an instrument panel such as an automobile speedometer and a tachometer, a control panel in an air conditioner, a clock dial, a display panel of a home appliance, and an audio system, and a method for producing the same. A front panel or the like of a product has a decorated synthetic resin board on its surface. Background technique [0002] Hitherto, as a method of manufacturing a synthetic resin molded product having a synthetic resin plate on its surface like the above-mentioned products, injection molding is used in which a decorated synthetic resin plate is inserted into an injection molding mold and molten resin is injected. [0003] As an example of such a molding method, the description in Patent Document 1 will be described. This document discloses a method of inserting a trimmed synthetic resin plate into a mold, closing the mold, and injecting a molten molding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/14B29C45/27B29C45/26B29C45/16B29L9/00B29L31/30B29L31/34
CPCF21V33/00H02B1/42H02G3/121H02G3/14H02G3/381
Inventor 中村浩之松田章夫
Owner SAKAIYA
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