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Injection molding technique and apparatus for improving production efficiency

A technology of injection molding process and production efficiency, applied in the field of injection molding process and device, can solve problems such as low production efficiency and long process time, and achieve the effect of improving production efficiency and saving time consumption

Inactive Publication Date: 2010-06-09
李飞宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an injection molding process and device for improving production efficiency. Disadvantages of length and low production efficiency

Method used

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  • Injection molding technique and apparatus for improving production efficiency
  • Injection molding technique and apparatus for improving production efficiency
  • Injection molding technique and apparatus for improving production efficiency

Examples

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Embodiment Construction

[0011] Refer below figure 1 and figure 2 Specific embodiments of the present invention will be described.

[0012] This embodiment provides an injection molding process and device that can greatly improve production efficiency. refer to figure 1 , the injection molding device includes a mold 5, a barrel, a one-way valve 4, and a pressure device 3. The mold 5 has a cavity 50 for forming an injection molded part, and an injection port 501 communicating with the cavity 50 for injecting plastic melt into the cavity 50 . Barrel in figure 1 It is not shown in , and its main function is the same as that of a general injection molding machine, mainly for feeding, melting and injection. The barrel has a nozzle 2 that is aligned with the injection port 501 of the mold 5 and can inject plastic melt into the cavity 50, and a screw 1 that provides injection pressure and returns material is also provided in the barrel. When the screw 1 advances, the plastic melt in front of it can be...

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Abstract

The invention relates to an injection molding technique for improving the manufacture efficiency and a device thereof, which mainly includes that after compounding a die, a screw in the material cylinder of an injection molding machine moves forwards to press a plastic fused mass in the material cylinder into the die cavity of the die to finish the stage of mold filling; a pressure device is usedfor applying pressure to the plastic fused mass near the location of a nozzle in the material cylinder from the side surface of the material cylinder to finish the stages of increasing density and maintaining pressure; the pressure device stops applying pressure and the screw moves forwards again to circularly carry out next injection. The invention creatively adopts the pressure device independent from a main screw to finish the stages of increasing density and maintaining pressure, thus leading the two stages of increasing density and maintaining pressure to be carried out simultaneously; thereby saving the time consumed by one of the two stages and greatly improving the manufacture efficiency.

Description

technical field [0001] The invention relates to a molding process of plastic parts, in particular to an injection molding process and a device for improving production efficiency. Background technique [0002] Usually, the injection molding process includes three stages: mold filling, densification and pressure holding, recycling and cooling. The plastic melt is pressurized by the screw in the barrel, and injected into the cavity of the mold from the nozzle. As the screw advances, the plastic melt gradually fills the entire cavity. This stage is the mold filling stage. When the plastic melt fills the entire cavity, the screw continues to move forward and remains at the final position for a period of time. This process is the stage of densification and pressure holding, and its main purpose is to make the injection molded parts more compact and have a certain strength. Then, the screw rotates while retreating, so that the plastic particles pass through the spiral groove of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/57B29C45/23B29C45/50
Inventor 王湘冀陈家和
Owner 李飞宇
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