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Sprue bush and manufacturing method therefor

A manufacturing method and runner technology, which are applied in the directions of additive manufacturing, process efficiency improvement, energy efficiency improvement, etc., can solve the problems of time increase, difficult cooling and solidification, and difficult cooling and solidification of molten resin raw materials.

Active Publication Date: 2019-03-01
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if the tapered raw material resin flow path 10' becomes longer, the influence on the downstream side with a relatively wider width W' will increase accordingly, and the molten resin raw material will become more difficult to cool and solidify.
If the molten resin raw material is difficult to cool and solidify, the time required from injecting the molten raw resin to taking out the molded product will increase, resulting in a longer molding cycle

Method used

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  • Sprue bush and manufacturing method therefor
  • Sprue bush and manufacturing method therefor
  • Sprue bush and manufacturing method therefor

Examples

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Embodiment Construction

[0039] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The shape and size of each element in the drawings are merely examples, and do not reflect actual shapes and sizes.

[0040] The present invention is based on the technical idea of ​​constituting the finally obtained sprue sleeve by at least two parts (base part and molding part). The "base" mentioned here essentially refers to the existing sprue bushing. Since the base is essentially an existing sprue bushing, the base can be used as a part for injection molding without providing another part (molded part) on the base main body. Nevertheless, the present invention is characterized in that the finally obtained sprue sleeve is intentionally formed by at least two parts (base and profile).

[0041] Such as figure 1 As shown, the sprue bushing 100 according to one embodiment of the present invention can be obtained by combining a base portion 100A and a moldi...

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PUM

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Abstract

In order to provide a manufacturing method for a sprue bush capable of suitably cooling the entirety of a molten resin raw material in a raw material resin flow path, one embodiment of the present invention provides a manufacturing method for a sprue bush, the method comprising providing a molding part on a base part which includes a raw material resin flow path and a cooling medium flow path, andthereby manufacturing the sprue bush, wherein: the molding part is provided with a downstream raw-material-resin flow path part corresponding to a downstream side region of the raw material resin flow path in the sprue bush; the molding part is further provided with a downstream cooling-medium flow path part being positioned around the downstream raw-material-resin flow path part and corresponding to a downstream side region of the cooling medium flow path in the sprue bush; and the downstream cooling-medium flow path part is provided so as to surround the downstream raw-material-resin flow path part.

Description

technical field [0001] The invention relates to a sprue sleeve and a manufacturing method thereof. More specifically, the present invention relates to a sprue bushing for a mold and a method of manufacturing the same. Background technique [0002] Molding technology using molds is one of the technologies supporting Japan's manufacturing industry. Examples of the molding technique include press molding, injection molding, extrusion molding, and the like. Among these molding methods, the injection molding method is a method of obtaining a molded article by melting a resin raw material using a mold for injection molding. [0003] In the injection molding method, a molten resin raw material is injected into a mold cavity 203 composed of one mold (core side mold) 201' and the other mold (cavity side mold) 202' of the injection mold 200'. 'within (refer to Figure 11 ). The injected molten resin material is cooled and solidified in the mold cavity 203' to form a molded product...

Claims

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Application Information

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IPC IPC(8): B29C33/38B29C45/27
CPCB29C45/27B29C45/2737Y02P10/25B22F10/20B33Y10/00B33Y80/00B29C33/3842B29K2905/00
Inventor 渡边真也阿部谕田中健一森干夫内野野良幸
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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