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Exhaust device for heating cylinder of injection molding machine

A technology of injection molding machine and exhaust device, applied in the field of exhaust device, can solve problems such as moisture and gas condensation, and achieve the effects of good suction, easy cleaning and easy configuration

Inactive Publication Date: 2012-02-22
MEIKI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in a structure in which nitrogen gas is not supplied into the heating cylinder, the technique of Patent Document 3 cannot be used to prevent condensation of moisture and gas generated inside the heating cylinder.

Method used

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  • Exhaust device for heating cylinder of injection molding machine
  • Exhaust device for heating cylinder of injection molding machine

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Experimental program
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Embodiment Construction

[0030] Embodiments of the present invention will be described in detail with reference to the drawings. figure 1 It is a longitudinal sectional view showing main parts of an exhaust device of an injection molding machine embodying the present invention.

[0031] exist figure 1 In the injection molding machine 10 shown, the molding raw material M put into the raw material supply device 15 is supplied to the raw material conveying device 21 while maintaining the depressurized state in the raw material supply device 15, and the molding raw material M after adjusting the conveyed amount by the raw material conveying device 21 is M (M1) is supplied to the heating cylinder 27 through the raw material drop passage 34 and the upper opening 33, and passes through the heating cylinder 27 and the screw 28 that is inserted into the inner hole 40 in a reciprocating manner and rotates under the action of the screw driving device 32 , the molding raw material M (M2) can be plasticized to be...

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Abstract

The invention provides an exhaust device for a heating cylinder of an injection molding machine, so that water and tar-like gas are not easily generated when molding raw materials are plasticized in a decompressed atmosphere in the heating cylinder of the injection molding machine. The exhaust device of the heating cylinder of the injection molding machine (10) of the present invention plasticizes the molding material (M) under a reduced-pressure atmosphere, and passes the moisture and gas generated in the heating cylinder (27) through the vacuum source (35) Suction and discharge to the atmosphere, on the inner surface of the raw material drop passage (34) above the upper opening (33) of the heating cylinder that is supplied with the molding raw material (M), a temperature rise control device (41) is provided. The heating control device (45) that electric heater (22) constitutes.

Description

technical field [0001] The present invention relates to an exhaust device for exhausting moisture and gas generated when molding raw materials are plasticized in a reduced-pressure atmosphere in a heating cylinder of an injection molding machine to the atmosphere. Background technique [0002] The communication port (raw material drop passage) through which the resin pellets (molding raw material) is dropped from the hopper toward the injection cylinder (heating cylinder) and passed is, for example, disclosed in Patent Document 1. In order to prevent bridges and Adhesion of resin pellets is carried out with water cooling through a water jacket. In addition, Patent Document 2 describes an example in which air cooling is performed on the part. Traditionally, in this way the raw material drop channel has been cooled to below about 70°C. However, in an injection molding machine that plasticizes molding materials in a reduced-pressure atmosphere, absorbs moisture and gas genera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/63B29C45/18
Inventor 阿南一也
Owner MEIKI
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