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Injection method and injection apparatus for molten resin, and injection stretch blow molding machine using injection apparatus

A technology of molten resin and injection device, which is applied in the field of injection and injection device of molten resin, and injection stretch blow molding machine using the injection device, can solve the problems of reduced plasticizing ability and inability to improve production efficiency, etc. Suppression of sink marks, prolongation of plasticization and kneading time, and promotion of low-temperature kneading and distribution

Pending Publication Date: 2021-11-23
A K TECH LAB INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, there is a problem that the plasticizing ability is reduced due to a large change in the resin temperature, and the production efficiency cannot be improved.

Method used

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  • Injection method and injection apparatus for molten resin, and injection stretch blow molding machine using injection apparatus
  • Injection method and injection apparatus for molten resin, and injection stretch blow molding machine using injection apparatus
  • Injection method and injection apparatus for molten resin, and injection stretch blow molding machine using injection apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0121] (test)

[0122] With regard to the injection stretch blow molding machine for molding bottles, experiments were carried out in Examples and Comparative Examples in preparation for implementing the present invention. Next, the test will be described.

[0123] First, polyethylene terephthalate (PET) was used as the resin material for the bottles manufactured using the injection stretch blow molding machines of this example and this comparative example. The set bottle weight is 96.5g. In addition, the number of injection molding dies was set to four in both Examples and Comparative Examples. The bottle quality and molding data of the following two molding methods of the following examples and comparative examples were obtained by conducting experiments, and the bottle quality and molding data were compared.

[0124] According to the injection stretch blow molding machine of this embodiment, the molding conditions required to mold well-formed bottles were determined. Si...

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PUM

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Abstract

The invention relates to an injection method and injection apparatus for molten resin, and an injection stretch blow molding machine using the injection apparatus. The injection apparatus is configured to feed a molten resin into an injection molding section of an injection stretch blow molding machine. The injection apparatus performs injection by uniformly melting a resin material while the duration from the time of starting plasticizing and kneading till completion of injection is shortened, thereby allowing the operation of the injection apparatus to fall within the time corresponding to the reduced injection molding process in the injection stretch blow molding machine, and shorting the molding cycle for a hollow body of the injection stretch blow molding machine. At the start of the filling (510) for each injection cycle, the injection apparatus starts plasticizing and kneading for generating the molten resin for injection in the next injection cycle of the injection stretch blow molding machine.

Description

technical field [0001] The present invention relates to a method for injecting molten resin, an injection device, and an injection stretch blow molding machine equipped with the injection device to mold a hollow body. Background technique [0002] Conventionally, there is an injection stretch blow molding machine for forming a preform into a hollow body by heating a preform into a hollow body of synthetic resin such as a PET bottle. In this injection stretch blow molding machine, an injection molding section, a blow molding section, and a take-out section are sequentially arranged at equal intervals in a circle on a plane, wherein the injection molding section molds a preform by an injection molding mold, The blow molding unit arranges the preform in a blow molding mold, stretches it, and blows it (injecting compressed air) to form a hollow body, and the take-out unit sends the hollow body out of the molding machine. [0003] In the injection stretch blow molding machine, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/46B29C45/47B29C45/57B29C45/76B29C49/06
CPCB29C45/461B29C45/47B29C45/57B29C45/76B29C49/06B29C2945/76665B29C2945/76859B29C49/08B29C49/02B29C2049/023B29C2049/4887B29C45/5092B29C45/762B29C2945/76846B29C2945/76849B29C2945/76862B29C45/50B29C49/062B29C49/70B29C49/28B29C45/60B29C45/1808B29C2049/701B29C45/18B29C2045/1875
Inventor 青木茂人
Owner A K TECH LAB INC