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Mold and mold manufacturing method

A manufacturing method and mold technology are applied in the field of injection molding molds and injection molding mold manufacturing, which can solve the problems of difficult and reliable temperature control, difficult to form water pipe paths, easy damage to O-rings, etc. The effect of shortened molding cycle and reliable temperature control

Active Publication Date: 2020-07-14
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not easy to use special tools such as gun drills to form water pipe paths on the side of the mold on the fixed side of the mold
In addition, it is not easy to form a water pipe path when drilling holes in the mold base
In addition, if a high-temperature refrigerant is used as the coolant, the O-ring is easily damaged
In addition, maintenance within the water pipe path is difficult in cases where the water pipe path is formed using special tools such as a gun drill
In addition, since the inlet and outlet of the coolant channel are not directly connected to the cooling pipe, it is not easy to reliably control the temperature.

Method used

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  • Mold and mold manufacturing method
  • Mold and mold manufacturing method
  • Mold and mold manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Under the following conditions, a molded article was obtained.

[0058] Resin material: PPWW567w3952

[0059] Mould: (size) 300mm×500mm×345mm / (mass) 403kg

[0060] Forming machine: Nissei ES2000

[0061] like Figure 8A and Figure 8B As shown, according to the injection molding die 1 according to the embodiment of the present invention, the cooling time of the molten resin can be shortened from 13 s to 8 s compared with the conventional mass production die, and as a result, the entire molding cycle can be shortened by 25.7% (35s→26s).

[0062] In the case of using the injection molding die 1 according to an embodiment of the present invention, as Figure 8C As shown in the photograph of , since the cooling temperature of the molten resin can be appropriately controlled and the molten resin can be sufficiently cooled, the sprue runner portion is in a good state. In contrast, in the case of using conventional mass production molds, such as Figure 8D As shown, the...

Embodiment 2

[0064] like Figure 9A and Figure 9B As shown, with the injection molding die 1 according to the embodiment of the present invention, the cooling time of the molten resin can be shortened from 39 s to 25 s compared with the conventional mass production die, and as a result, the entire molding cycle can be shortened by 30.8% (65s→45s).

[0065] When the injection molding die 1 according to the embodiment of the present invention is used, since the cooling temperature of the molten resin can be appropriately controlled to sufficiently cool the molten resin, the phenomenon of runner elongation does not occur. In addition, the temperature analysis of the runner jacket 3 between the cooling steps was carried out, such as Figure 9CAs shown, it can be seen that the temperature in the vicinity of the injection port of the sprue sleeve is sufficiently cooled as compared with other parts of the sprue sleeve. On the other hand, when a conventional mass production mold is used, the c...

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Abstract

The present invention is a mold comprising a movable side mold, a fixed side mold, and a sprue sleeve provided in the fixed side mold with a coolant flow path, and is characterized in that the inlet of the coolant flow path and the The outlets are respectively directly connected to cooling pipes arranged along a space region formed in the fixed side mold; the space region has a form in which at least one surface of the fixed side mold is opened.

Description

technical field [0001] The present invention relates to a mold and a method for manufacturing the mold. Specifically, the present invention relates to a mold for injection molding and a method for producing the mold for injection molding. Background technique [0002] One of the technologies that supports Japan's "manufacturing" industry is molding technology using molds. As this molding technique, a press molding method, an injection molding method, an extrusion molding method, an injection molding method, etc. are mentioned. Among these molding methods, injection molding is mainly a method of obtaining a molded product by injecting a heated and molten resin into a mold, cooling and solidifying it, and is suitable for mass production of molded products of complex shapes. The steps of the injection molding method are generally composed of a mold clamping step, an injection step, a cooling step, and a mold opening step. By repeating these steps, a molded product can be con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/73B29C45/27
CPCB29C45/26B29C45/27B29C45/2737B29C45/7312B29C2045/2753
Inventor 阿部谕田中健一内野野良幸松本武武南正孝
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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