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Spring nozzle for differential injection molding

A spring nozzle and differential injection technology, applied in the field of spring nozzles, can solve the problem that the nozzle is difficult to meet the differential injection molding and other problems

Active Publication Date: 2011-05-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing nozzles are difficult to meet the application of the new technology of differential injection molding. In order to realize the special requirements of differential injection molding, the present invention is proposed

Method used

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  • Spring nozzle for differential injection molding
  • Spring nozzle for differential injection molding
  • Spring nozzle for differential injection molding

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Embodiment Construction

[0018] The present invention is a spring nozzle for differential injection molding, such as figure 1 As shown in ~7, it consists of nozzle head 1, nozzle gland 2, spring 3, nozzle body 4, control valve core 5, valve core gland 6, and sealing ring 7.

[0019] figure 1 , figure 2 Among them, the nozzle body 4 is provided with a conical hole perpendicular to the axial direction, and the lower end of the control valve core 5 contacts the nozzle body 4 as a conical surface, and the control valve core 5 is installed on the conical inner hole of the nozzle body 4; the valve body gland 6 The control valve core 5 is fastened on the nozzle body 4 by threads. The control spool 5 passes through the middle hole of the valve body gland 6, and the control spool 5 can be manipulated outside the nozzle body 4 to rotate around its axis. The spring 3 is installed on the nozzle head 1 , one end surface of the spring 3 is close to the end surface of the nozzle head 1 , and the other end is clo...

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Abstract

The invention relates to a spring nozzle for differential injection molding, which mainly comprises a nozzle head, a nozzle body, a nozzle gland, a spring, a control valve core and a valve body gland, wherein the control valve core is arranged on a tapered bore of the nozzle body; the control valve core is fastened on the nozzle body by the valve body gland; the control valve core passes through an intermediate hole of the valve body gland; the control valve core is provided with a cylindrical hole along the melt flowing direction of the nozzle body; one end face of the spring is abutted on the nozzle head, and the other end face of the spring is abutted on the end face of the bore of the nozzle body; when the nozzle gland and the nozzle body are connected, pretightening force is applied to the spring. A circular conical surface structure is adopted by the control valve core, thus, good positioning and sealing between the control valve core and the nozzle body is ensured; the control valve core makes controlling the nozzle to be opened and closed become convenient, and thereby, the working number of differential injection nozzles is controlled. The nozzle head and a sprue bush arein close contact by the spring in the nozzle body through the pretightening force of the spring, thus, a function of preventing materials from leaking is achieved. The nozzles can be matched for use,and each nozzle can be used for independent injection molding products.

Description

technical field [0001] The invention relates to an injection molding nozzle, in particular to a differential injection spring nozzle. Background technique [0002] The plastic heated and melted in the barrel is injected into the cavity through the nozzle for molding. The nozzle is the connecting part of the injection molding machine barrel and the mold runner, and acts as a bridge. [0003] Differential injection molding is a new type of injection molding technology. The differential system designed by this method has one inlet and multiple outlets to realize the differential injection function of polymer melt. Each outlet of the differential system needs to be installed with a nozzle, and the opening and closing of each nozzle should be independently controlled, and each nozzle should be close to the sprue bushing to achieve a good anti-leakage effect. [0004] Differential injection molding technology uses a differential pump to evenly divide large strands of material in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/20
Inventor 杨卫民张攀攀谢鹏程王建丁玉梅
Owner BEIJING UNIV OF CHEM TECH
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