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Injection molding machine

An injection molding machine and molding material technology, which is applied in the field of injection molding machines, can solve the problems of reduced quality of molded products, difficult mixing and shearing, etc., and achieves the effect of good mixing.

Active Publication Date: 2014-05-07
SUMITOMO HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the low-viscosity molding material is easy to slide relative to the cylinder or screw, and is not easy to be sheared, so it is not easy to be mixed
Therefore, the quality of the molded product deteriorates

Method used

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Embodiment Construction

[0019] Hereinafter, modes for implementing the present invention will be described with reference to the drawings. In each drawing, the same or corresponding code|symbol is attached|subjected to the same or corresponding structure, and description is abbreviate|omitted. Hereinafter, the ejection direction of the resin will be described as the front, and the direction opposite to the ejection direction of the resin will be described as the rear.

[0020] The injection molding machine repeatedly manufactures molded products through the following steps as a cycle, namely, the mold closing process of closing the mold unit composed of the fixed mold and the movable mold, the mold clamping process of tightening the mold unit, and pouring molten resin into the mold unit The filling process of the injection molding machine, the pressure holding process of applying pressure to the poured resin, the cooling process of solidifying the resin in the mold device after the pressure holding p...

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Abstract

The invention provides an injection molding machine, and a molding material thereof is good in blending property. The injection molding machine comprises a cylinder body (11) fed with the molding material, a screw rod (20) which is rotatably arranged in the cylinder body (11) to freely move forward and backward in the axial direction, and a driving device (60) used for driving the screw rod (20). In the rotation measuring process of the screw rod (20), the driving device (60) prevents the screw rod (20) from moving backward at the given time and then allows the screw rod (20) to move backward.

Description

technical field [0001] This application claims priority based on Japanese Patent Application No. 2012-233105 filed on October 22, 2012. All the content of the application is used in this specification by reference. [0002] The invention relates to an injection molding machine. Background technique [0003] The injection molding machine includes: a cylinder to which molding materials (such as resin pellets) are supplied; a screw configured to rotate freely in the cylinder and move forward and backward freely; and a heating source to heat the cylinder. The resin supplied into the flight groove of the screw is sent forward with the rotation of the screw, and is gradually melted by heat from the cylinder, etc. As the molten resin is sent to the front of the screw and accumulates in the front of the cylinder, the screw retreats. Thereafter, when the screw is advanced, the molten resin accumulated in front of the screw is injected from a nozzle formed at the front end of the c...

Claims

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Application Information

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IPC IPC(8): B29C45/76
CPCB29C45/50B29C45/5008B29C45/28
Inventor 佐藤雄司
Owner SUMITOMO HEAVY IND LTD
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