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Injection molding machine and injection molding method

A technology of injection molding machine and cavity, which is applied in the field of injection molding machine and injection molding, can solve the problems such as the complex structure of the mold device, and achieve the effect of simplifying the structure

Inactive Publication Date: 2014-11-12
SUMITOMO HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the injection molding machine described in the above-mentioned Patent Document 1 has dedicated piping for exhausting gas, so the structure of the mold device is complicated.

Method used

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  • Injection molding machine and injection molding method
  • Injection molding machine and injection molding method
  • Injection molding machine and injection molding method

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Experimental program
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Effect test

no. 1 Embodiment approach

[0049] Figure 1 to Figure 6 It is a sectional view of the injection molding machine in the first embodiment of the present invention. figure 1 is a cross-sectional view in the mold closing process, figure 2 is a cross-sectional view in the gas supply process after the mold clamping process, image 3 is a cross-sectional view in the injection process, Figure 4 is a cross-sectional view in the gas discharge process, Figure 5 is a cross-sectional view in the mold opening process, Figure 6 It is a cross-sectional view of a molded product during the extrusion process. Figure 7 is enlarged figure 2 The cross-sectional view of the main part, Figure 8 is enlarged Figure 4 Cross-sectional view of the main part.

[0050] Such as figure 1 As shown, the injection molding machine 10 has a mold device 20 , an injection device 50 , an ejector device 60 , an air intake and exhaust mechanism (or air intake mechanism) 70 and a gas discharge mechanism 80 . The injection device...

no. 2 Embodiment approach

[0104] Figure 13 to Figure 18 It is a sectional view of the injection molding machine in the second embodiment of the present invention. Figure 13 is a cross-sectional view in the mold closing process, Figure 14 is a cross-sectional view in the gas supply process after the mold clamping process, Figure 15 is a cross-sectional view in the injection process, Figure 16 is a cross-sectional view in the gas discharge process, Figure 17 is a cross-sectional view in the mold opening process, Figure 18 It is a cross-sectional view in the ejection process of the molded product. Figure 19 is enlarged Figure 14 Cross-sectional view of the main part.

[0105] Such as Figure 13 As shown, the injection molding machine 310 has a mold device 320 , an injection device 50 , an ejector device 360 ​​and an intake and exhaust mechanism 70 . Furthermore, the injection molding machine 310 has first and second gas discharge mechanisms 380, 390, and has gas discharge passages on both...

no. 3 Embodiment approach

[0143] Figure 20 ~ Figure 25 It is a sectional view of the injection molding machine in one embodiment of the present invention. Figure 20 is a cross-sectional view in the mold closing process, Figure 21 is a cross-sectional view in the gas supply process after the mold clamping process, Figure 22 is a cross-sectional view in the injection process, Figure 23 is a cross-sectional view in the gas discharge process, Figure 24 is a cross-sectional view in the mold opening process, Figure 25 It is a cross-sectional view in the ejection process of a molded product. Figure 26 is enlarged Figure 21 Cross-sectional view of the main part.

[0144] Such as Figure 20 As shown, the injection molding machine 410 has a mold device 420 , an injection device 50 , an ejector device 460 , an intake and exhaust mechanism 70 and a gas discharge mechanism 480 . The gas discharge mechanism 480 of the present embodiment plays a role in changing the cavity C3 in the mold device 420 (...

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Abstract

An injection molding machine includes a gas feeding mechanism configured to feed gas to a cavity formed between a first mold plate and a second mold plate in a clamped state; an injection apparatus configured to inject a foamable resin into the cavity having an inside pressure thereof increased to be higher than an atmospheric pressure by the gas feeding mechanism; and a gas releasing mechanism configured to release the gas inside the cavity to an atmosphere through a gap formed between an inner wall surface of a through hole formed through one of the first mold plate and the second mold plate and an outer circumferential surface of a mold member inserted into the through hole, during or after the injection of the foamable resin by the injection apparatus.

Description

technical field [0001] This application claims priority based on Japanese Patent Application No. 2011-096415 filed on April 22, 2011. All the content of the application is used in this specification by reference. [0002] The invention relates to an injection molding machine and an injection molding method. Background technique [0003] As an injection molding method, a gas counter-pressure method (GCP method) is widely used (for example, refer to Patent Document 1). The GCP method is a method of supplying gas to a cavity in a mold device, injecting a foamable resin into a cavity pressurized to a predetermined air pressure, and exhausting the cavity during or after injection. According to this method, a molded article having almost no foam marks on the surface and foamed inside can be obtained. [0004] Patent Document 1: Japanese Patent Application Laid-Open No. 61-239916 [0005] However, since the injection molding machine described in the aforementioned Patent Docume...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/03B29C45/34B29C45/26B29C45/57
CPCB29C45/34B29C33/10B29C44/588B29C45/174B29K2105/04B29C44/105B29C44/351B29C44/42B29C45/401B29C2045/1741
Inventor 德能龙一
Owner SUMITOMO HEAVY IND LTD