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Pretreatment method of molding material, pretreatment device, injection molding machine, and injection molding method

A technology of pretreatment device and molding material, applied in coating and other directions, can solve the problem of yellowing of resin products, achieve the effect of temperature stability, prolong high temperature period, and inhibit oxidation

Active Publication Date: 2019-05-28
KAWATA MFG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, if the molding material supplied to the injection molding machine is oxidized, discoloration such as yellowing will occur in the molded resin product

Method used

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  • Pretreatment method of molding material, pretreatment device, injection molding machine, and injection molding method
  • Pretreatment method of molding material, pretreatment device, injection molding machine, and injection molding method
  • Pretreatment method of molding material, pretreatment device, injection molding machine, and injection molding method

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Embodiment Construction

[0058] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[0059]

[0060] figure 1 It is a figure which shows the structure of the preprocessing apparatus 1 and the injection molding machine 2 concerning one embodiment of this invention. The preprocessing device 1 performs preprocessing such as drying on resin pellets, which are molding materials made of powder or granular materials, and supplies the processed resin pellets to the injection molding machine 2 . The injection molding machine 2 melts the resin pellets supplied from the preprocessing device 1 and injects them into the mold 209 to solidify the resin in the mold 209 to form a resin product. In addition, in figure 1 In , the structure of the injection molding machine 2 is simplified. Pretreatment device 1 and injection molding machine 2 such as figure 1 shown are connected to constitute a single resin product manufacturing system 100 .

[0061] The p...

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Abstract

The present invention provides a method and machine for pre-processing of molding material, an injection molding machine and an injection molding method for further inhibition of oxidation of the molding material through addition of the content of inactive gas in the molding material. After the molding material is heated to be dried, the temperature of the molding material in the container (40) having the inactive gas is reduced. At the same time, the pressure of the container (40) maintains at an approximately constant value and the temperature of the molding material is reduced. In the container (40), the temperature of the molding material is slower reduced then natural cooling. Then, the molding material after reduced temperature is supplied to a molding machine (2) so that the content of the inactive gas in the molding material is increased. Therefore the oxidation of the molding material at molding may be inhibited.

Description

[0001] This application claims priority based on Japanese Patent Application No. 2014-136312 filed on July 1, 2014 and Japanese Patent Application No. 2015-109397 filed on May 29, 2015. The entire content of the application is incorporated in this specification by reference. technical field [0002] The present invention relates to a preprocessing method and a preprocessing device for a molding material supplied to a molding machine, and an injection molding machine and an injection molding method for injecting the pretreated molding material into a mold after melting. Background technique [0003] Conventionally, in the manufacturing process of resin products, molding materials such as resin pellets supplied to injection molding machines have been subjected to pretreatments such as drying. Pretreatment of molding materials is described in Patent Document 1, for example. In the device of Patent Document 1, the crumb or granular resin material is supplied to the plasticizing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B13/04B29C45/00
Inventor 张春晓野龙平帆山克明平野秀臣后藤大辅中村彻
Owner KAWATA MFG
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