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Injection molding apparatus

A technology of injection molding and injection molding, which is applied in the field of injection molding devices and can solve problems such as the impact of reinforced fiber breakage

Inactive Publication Date: 2014-03-26
AISIN SEIKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the shearing force caused by the rotation of the screw has a great influence on the breakage of the reinforcing fibers, even if the above-mentioned improvement measures are implemented, the fiber length is only extended by about 2 to 3 mm at most.

Method used

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no. 1 approach ）

[0033] Hereinafter, the first embodiment of the present invention will be described with reference to the drawings. figure 1 It is a schematic diagram showing the injection molding apparatus of this embodiment. Such as figure 1 As shown, the injection molding apparatus 1 of the present embodiment includes an injection cylinder 10, a two-stage screw 20 arranged in the injection cylinder 10, and a heating tank 30. In addition, in figure 1 The mold clamping device, the heating source of the injection cylinder 10, the motion control device, and the temperature control device are omitted.

[0034] The injection cylinder 10 is configured to extend in a predetermined axial direction, and a cylindrical space is formed in the injection cylinder 10. At the front end of the injection cylinder 10 (at the figure 1 The center is the left end) is equipped with a nozzle 11, and the molten resin in the injection cylinder 10 is injected from the nozzle 11 toward the metal mold MO. The injecte...

no. 2 approach ）

[0062] Next, a second embodiment of the present invention will be described. Figure 5 It is a schematic diagram showing the injection molding apparatus of this embodiment. Such as Figure 5 As shown, the injection molding apparatus 2 of this embodiment includes an injection cylinder 60, an injection screw 70 arranged in the injection cylinder 60, and a heating tank 80. In addition, in Figure 5 In this, the mold clamping device, the heating source of the injection cylinder 60, the motion control device, the temperature control device, etc. are omitted.

[0063] The injection cylinder 60 is configured to extend in a predetermined axial direction, and a cylindrical space is formed in the injection cylinder 60. At the front end of the injection cylinder 60 (at the Figure 5 The center is the left end) is equipped with a nozzle 11, and the molten resin in the injection cylinder 60 is injected from the nozzle 11 toward the metal mold MO. The injected molten resin is filled in the ma...

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Abstract

The invention provides an injection molding apparatus capable of restraining excessive wreck of reinforced fibers. The injection molding apparatus (1) includes a heating groove (30) heating filament fiber reinforcing fiber assemblies (S) by using a microwave heater (32), an injection cylinder (10) to which a thermoplastic resin and the filament fiber reinforcing fiber assemblies are supplied, a fusion screw part (21) capable of being configured in the injection cylinder in a rotating mode and compressing and kneading the thermoplastic resin, a disperse transmission screw part (22) configured in the injection cylinder, connected to the front end of the fusion screw part in an integrated rotating mode with the fusion screw part, and devillicating the filament fiber reinforcing fiber assemblies, a main hopper (51) supplying the thermoplastic resin to a void formed between the injection cylinder and the fusion screw part, and a secondary hopper (52) supplying the filament fiber reinforcing fiber assemblies to a void formed between the injection cylinder and the disperse transmission screw part. In addition, the disperse transmission screw part is an uncompressed screw.

Description

Technical field [0001] The present invention relates to injection molding apparatus. Background technique [0002] In order to improve the strength of resin injection molded products, technology has been developed to inject molten resin containing reinforcing fibers such as carbon fiber and glass fiber. [0003] Patent Document 1 discloses using a twin-screw extruder to mix strand-shaped reinforcing fibers (a reinforcing fiber aggregate obtained by binding a plurality of reinforcing fibers with a binder) and a thermoplastic resin, and then supplying the mixture to an injection cylinder to perform injection molding. Injection molding equipment. According to this injection molding apparatus, not only strand-shaped reinforcing fibers and thermoplastic resin are added to the twin-screw extruder, but also granular solid matter with an aspect ratio of 1 to 5 and an average particle diameter of 10 μm or less is added. Since the granular solids act as lubricants, excessive breakag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/03B29C45/47B29C45/60B29C45/72B29C45/18
CPCB29B13/02B29C45/74B29C45/60B29K2105/12B29C45/1816B29C45/03B29C45/1858B29C45/47B29C2045/0096
Inventor 井沢省吾原洋树樋口亮平
Owner AISIN SEIKI KK