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Injection molding method, injection-molded product, and injection mold

A technology of injection molding and molded products, which is applied in household appliances, other household appliances, thin material processing, etc., and can solve problems such as difficulty in suppressing dents

Active Publication Date: 2012-12-12
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the injection molding method disclosed in Patent Document 1, the entire mold is opened and closed within the time when the molten resin injected and filled in the cavity of the mold can flow, and therefore it is more difficult to suppress the injection molding required in other areas than in other aspects. High surface accuracy and high quality requirements for surface depressions

Method used

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  • Injection molding method, injection-molded product, and injection mold
  • Injection molding method, injection-molded product, and injection mold
  • Injection molding method, injection-molded product, and injection mold

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no. 1 approach

[0038] (structure)

[0039] First, combine figure 1 The structure of the injection molding die in the first embodiment will be described.

[0040] figure 1 It is a figure which shows the schematic structure of the injection molding die 1, and is a cross-sectional view of the injection molding die 1. FIG.

[0041] figure 1 The injection molding mold 1 shown in the figure is to inject molten resin into the molding space (cavity) formed between a set of molds when a set of molds capable of closing and opening the molds is in a closed state, and make the mold A device for manufacturing injection molded products by solidifying injected molten resin. In addition, the description related to the molding space will be described later.

[0042] Here, in the first embodiment, the case where the injection molded product has light transparency and has a cross-sectional shape of an equilateral triangle or a prism approximately equilateral triangle will be described as an example. This...

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Abstract

The invention provides an injection molding method, an injection-molded product, an optical element, an optical prism, an ink tank, a recording device, and an injection mold. In the injection molding method, a molten resin (R) which is injected into a molding space formed between a fixed side mold (2) including a movable insert (6) and a movable side mold (4), is cooled in a state in which a surface of the molten resin comes into contact with the movable insert (6) and thereby the surface is solidified, and internal solidification of the molten resin (R) is completed by cooling the molten resin (R) in a state where the molten resin (R) and the movable insert (6) are separated from each other by moving the movable insert (6) before the internal solidification of the molten resin (R), whose surface is solidified in a state in which the surface comes into contact with the movable insert (6), is completed.

Description

technical field [0001] The present invention relates to an injection molded product having a high-quality surface requiring high surface precision, such as an optical prism, an injection mold for producing the injection molded product, and an injection molding method. Background technique [0002] Conventionally, for example, Patent Document 1 discloses an injection molding method for producing an injection-molded product having a high-quality surface requiring high surface accuracy (flatness), such as an optical prism. [0003] The injection molding method disclosed in Patent Document 1 is a method in which molten resin is further injected during or after mold opening while the molten resin injected and filled in the molding space can flow. Then, after forming the closed mold state, the mold is opened slightly, and a gap is provided between the surface of the injection molded product and the mold for a certain period of time, and the mold closed state is formed within the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/00B29C45/26G02B5/04B32B1/00
CPCB29D11/00B29C45/0025B29D11/0048G02B5/04B29C45/7207B29C45/26Y10T428/24479Y10T428/13
Inventor 横田启塩原庆一
Owner SEIKO EPSON CORP
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