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Shoot out compression forming method of small-sized light conducting plate, shoot out compression forming mold and small-sized light conducting plate

A technology of compression molding and light guide plate, which is applied in the direction of optics, light guide, household appliances, etc., to achieve the effect of shortening the forming cycle time

Inactive Publication Date: 2008-06-25
MEIKI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, especially in the case of a small light guide plate, there is no combination of various cooling medium flow paths from the mold structure to cool various parts such as runners.

Method used

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  • Shoot out compression forming method of small-sized light conducting plate, shoot out compression forming mold and small-sized light conducting plate
  • Shoot out compression forming method of small-sized light conducting plate, shoot out compression forming mold and small-sized light conducting plate
  • Shoot out compression forming method of small-sized light conducting plate, shoot out compression forming mold and small-sized light conducting plate

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Embodiment Construction

[0050] The injection compression molding method of the small light guide plate of the present invention will be described with reference to FIGS. 1 to 14 . FIG. 1 is a cross-sectional view of an injection compression molding mold used in the injection compression molding method of a small light guide plate according to this embodiment, showing a state where mold clamping force has not yet acted. 2 is a cross-sectional view of an injection compression molding mold used in the injection compression molding method of a small light guide plate according to this embodiment, showing a state where mold clamping force acts. 3 is a front view showing a movable mold of the injection compression molding mold used in the injection compression molding method of the small light guide plate according to the present embodiment. 4 is a front view of a fixed mold of an injection compression molding mold used in the injection compression molding method of a small light guide plate according to t...

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Abstract

The object of the present invention is to provide an injection compression molding method for a small light guide plate, so as to shorten the forming cycle time of the small light guide plate and form a small light guide plate with excellent optical performance when the small light guide plate is formed by injection compression molding. When carrying out injection compression molding of a small light guide plate (P) with a diagonal size of 1 inch to 5 inches and a plate thickness of the thickest part of 0.25mm to 1.0mm, in addition to the cavity forming surface (62) of the fixed mold (13) and In addition to the cavity forming surface (27) of the movable mold (12), at least one of the sprue bushing (56) of the fixed mold (13) or the gate part forming surface (39) of the movable mold (12), respectively Cooled by different cooling medium channels (61, 28, 63, 46) to form a small light guide plate (P).

Description

technical field [0001] The present invention relates to an injection compression molding method for a small light guide plate, an injection compression molding mold, and a small light guide plate, and particularly to an injection compression molding method, an injection compression molding mold, and a small light guide plate for a light guide plate for a mobile phone. Background technique [0002] Light guide plates used in display devices such as liquid crystal, plasma, and organic EL are generally produced by injection molding or injection compression molding, which is one of these fields. When molding a light guide plate by injection compression molding, it is desirable to shorten the molding cycle time if production efficiency is to be improved. The forming cycle time of the light guide plate depends on its size and plate thickness. In the 18-inch light guide plate of Patent Document 1 with a wall thickness of 12 mm, a cycle time of 160 seconds or more is required. On ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/57B29C45/73B29C45/76B29C45/78B29C45/26G02B6/00B29K69/00B29L11/00
CPCB29L2011/0075B29C45/561
Inventor 蛯名利幸西田一彦
Owner MEIKI