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Injection compression molding die

A technology of compression molding and molds, which is applied in the field of injection compression molding molds, can solve problems such as burrs, adhesion, and molten resin intrusion, and achieve the effect of preventing burrs

Inactive Publication Date: 2012-10-03
MEIKI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during molding, there is a problem that molten resin intrudes into the above-mentioned voids to form burrs.
Furthermore, in addition to the above-mentioned burrs causing problems to the molded product, there are also cases where small pieces or powder after the burrs are broken adhere to other parts of the molded product and the cavity to cause problems.

Method used

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Examples

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Embodiment Construction

[0032] Regarding the injection compression molding die of the present invention, refer to Figure 1 to Figure 3 Be explained. figure 1 It is a sectional view of the injection compression molding mold of the light guide plate of this embodiment, and is a figure which shows the state at the time of mold abutting. figure 2 It is a front view of the movable mold of the injection compression molding mold of the light guide plate of this embodiment. image 3 It is a sectional view of main parts of the injection compression molding mold of the light guide plate of this embodiment.

[0033] The injection compression molding mold 11 for a light guide plate of the present embodiment is a mold for molding a light guide plate for a mobile phone by injection compression molding. In injection compression molding, the interval between the cavity main surface forming surface 18a of the movable mold 12 and the cavity main surface forming surface 42a of the fixed mold 13 is variable between ...

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Abstract

The invention provides an injection compression molding die(11), capable of preventing a side forming block from being meshed with a core block during the forming process and preventing the formation of the bur in the product. The core block (18) integrated with a body portion (15) of a mould and the side forming block (29, 30, 31) altering the relative position in the open and close direction ofthe mould relative to the core block (18) are arranged in a first mould (12), the side forming block (29, 30, 31) is in the surface butting against with a second mould (13) to form a volume-variable cavity (C1, C2), wherein, the side forming block (29, 30) is pushed toward the core block (18), at least one of inner side (29b, 30b, 31b) of the side forming block (29, 30, 31) and outer side (10b) of the core block (18) is subjected to the wear-resistant machining (W).

Description

technical field [0001] The present invention relates to an injection compression molding die, and more particularly to an injection compression molding die of the type in which a core block integrated with a mold body is provided in a first die and the relative position of the core block is changed in the mold opening and closing direction. The side forming block of the first mold is in contact with the second mold to form a variable-volume cavity. Background technique [0002] As an injection compression molding die in which a cavity with a variable volume is formed between the first mold and the second mold and the molten resin injected into the cavity is compressed, there are known ones described in Patent Document 1 to Patent Document 3. Injection compression molding mold. Patent Document 1 refers to a so-called in-low die in which a convex portion of a movable die enters a concave portion of a fixed die to form a variable-volume cavity. However, in Patent Document 1, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/26B29C45/56
CPCB29C45/33B29C45/561B29C2045/363B29C2045/5635
Inventor 蛯名利幸一口敬
Owner MEIKI
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