Micro-foaming injection-molding screw rod

An injection molding and micro-foaming technology, applied in the field of injection molding screws, can solve problems such as insufficient mixing capacity, and achieve the effects of increasing conveying capacity and shearing capacity, relieving pressure increase, and improving mixing effect.

Inactive Publication Date: 2012-12-12
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a micro-foaming injection molding screw, which can overcome the shortcomings of the traditional screw with insufficient mixing capacity, greatly improve the mixing effect of the screw, and make the supercritical gas quickly and evenly distributed in the polymer melt, forming a stable Polymer melt / supercritical gas homogeneous system; at the same time, due to the use of a non-return structure at the screw inlet position, it can effectively prevent the melt backflow from blocking the inlet channel and ensure the continuous stability of the micro-foaming injection molding process; this kind of Microfoaming injection screw can be widely used in various types of microfoaming injection machines

Method used

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  • Micro-foaming injection-molding screw rod
  • Micro-foaming injection-molding screw rod
  • Micro-foaming injection-molding screw rod

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Embodiment Construction

[0018] A microfoaming injection molding screw, such as figure 1 As shown, it mainly consists of rear screw 1, rear positioning ring 2, rear check ring 3, rear mixing section 4, front mixing section 5, front screw 6, front positioning ring 7, front check ring 8 and screw head 9 Composition; the tail of the rear screw 1 has a keyway, which is installed on the injection machine through the keyway and the key; the head of the rear screw 1 has a threaded hole, and the tail of the rear mixing section 4 has a rear stepped shaft 11, and the rear stepped shaft 11 The end has a rear stepped shaft thread 12, the rear positioning ring 2 and the rear check ring 3 are sequentially set on the rear stepped shaft 11 of the rear mixing section 4, and the rear mixing section 4 is connected to the rear screw 1 through the rear stepped shaft 11 The head of the rear mixing section 4 has a front stepped shaft 14, the end of the front stepped shaft 14 has a front stepped shaft thread 15, the tail of ...

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PUM

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Abstract

The invention discloses a micro-foaming injection-molding screw rod, mainly comprising a rear screw rod, a rear positioning ring, a rear check ring, a rear mixing section, a front mixing section, a front screw rod, a front positioning ring, a front check ring and a screw rod head, wherein hexagonal threads are adopted for the rear mixing section and the front mixing section, forward threads consistent with the turning direction of the screw rod are adopted for the rear mixing section, and reverse threads are adopted for the front mixing section and are provided with forward grooves. The micro-foaming injection-molding screw rod has a greatly improved mixing and homogenizing effect so that supercritical gas rapidly and uniformly distributes in a polymer melt so as to form a stable polymer melt / supercritical gas homogeneous system; meanwhile, checking is carried out in a gas inlet position so as to effectively prevent the melt from flowing back to block a gas inlet channel; and the special micro-foaming injection-molding screw rod can be widely applied to micro-foaming injection machines of various types.

Description

technical field [0001] The invention relates to an injection molding screw, in particular to a screw suitable for microfoaming injection molding. Background technique [0002] In recent years, people's requirements for plastic products have been continuously improved, especially in terms of energy conservation and environmental protection. It is required to reduce production costs as much as possible while meeting the use requirements of products, improve resource utilization, and realize green manufacturing. Injection molding is an important method for the molding and processing of polymer materials. Micro-foaming injection molding is one of the new injection molding technologies. This technology not only saves raw materials but also shortens the molding and processing cycle of products. It is a typical green processing technology. . [0003] The screw is an important plasticizing part of the injection machine and plays a vital role in the molding process. The traditional...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C44/42B29C45/60
Inventor 谢鹏程边智丁玉梅杨卫民
Owner BEIJING UNIV OF CHEM TECH
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