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Method of manufacturing resin molded product and manufacturing device thereof

A technology for resin molds and products, applied in other home appliances, applications, home appliances, etc., can solve problems such as layer structure disturbance

Inactive Publication Date: 2016-06-15
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, when the molded article is formed of multiple layers of resin, the layer structure may be disturbed in this groove portion

Method used

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  • Method of manufacturing resin molded product and manufacturing device thereof
  • Method of manufacturing resin molded product and manufacturing device thereof
  • Method of manufacturing resin molded product and manufacturing device thereof

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0034] will refer to Figure 1 to Figure 5 , a method of manufacturing a resin molded product and a manufacturing apparatus thereof according to an embodiment of the present invention will be described. exist Figure 4 and Figure 5 In , for convenience of description, some parts are shown in an enlarged manner.

[0035] In this embodiment, a description will be given of the case of a fuel tank for a vehicle, which is made of resin as an example of a resin molded product (hereinafter, referred to as "resin fuel tank"). First, a manufacturing apparatus of a resin fuel tank will be described. Then, its manufacturing method will be described.

[0036] Such as figure 1 As shown, a manufacturing device (hereinafter referred to as "manufacturing device") 10 of a resin fuel tank includes: a die head 12, which extrudes a plate-shaped molten resin; a pair of molding dies 14A, 14B, which make 12 molding of the extruded plate-shaped molten resin; and a cooling die 16 which enters t...

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PUM

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Abstract

A manufacturing device (10) of a resin fuel tank can efficiently cool molded bodies (18) when a cooling mold (16) is inserted on the inside of the sheet-like molded bodies (18) and shaping molds (14A, 14B) are closed. Here, semispherical convex portions (36) are tightly formed on a surface of the cooling mold (16), and an contact area of the convex portions (36) with the molded body (18) gradually decreases in a boundary region (18C) of the molded body (18) in which transition from an contact portion (18A), with which the cooling mold (16) contacts, to a non-contact portion (18B), with which the cooling mold (16) does not contact, is made. Thus, a temperature gradient of the molded body (18) is suppressed in the boundary region (18C), and formation of a groove in the boundary region (18C) can be suppressed.

Description

technical field [0001] The present invention relates to a method of manufacturing a resin molded article and an apparatus for manufacturing the same. Background technique [0002] It is disclosed that in order to produce a large-sized hollow resin molded product by blow molding, a three-dimensional cooling mold (cooling mold) is inserted into molten resin extruded from an extrusion die, the molding mold is closed, and then the molten resin passes through the molding mold and The cooling molds are both cooled (for example, see Japanese Patent Application Laid-Open No. 2012-218212 (JP 2012-218212A)). This enables shorter cooling times and thus shorter molding cycles. [0003] When the inside of the molten resin is cooled by the cooling mold, as described, by the temperature difference in the boundary area between the contact portion of the resin mold contacting the cooling mold and the non-contact portion of the resin mold not contacting the cooling mold The difference in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/00B29C51/26B29C51/08B29C49/02B29C49/04B29C51/30B29C51/42B29C31/00B29C48/07
CPCB29L2031/7172B29C49/04B29C51/082B29C51/267B29C51/30B29C2049/023B29C48/0017B29C48/07B29C51/428B29C49/04104B29C2949/08
Inventor 安泽卓史铃木铁兵
Owner TOYOTA JIDOSHA KK