Electrically driven reverse mold moving and pulse pressure inducing injection molding process and apparatus

An injection device and pulsating pressure technology, applied in the field of injection molding methods and devices, can solve the problems of difficulty in improving the performance of plastic products, long molding cycle, uneven mixing, etc., to reduce oil pollution, fast filling speed, and simple structure. Effect

Inactive Publication Date: 2007-06-06
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome some problems in the existing injection molding process from the molding method and molding equipment, such as uneven mixing, high energy consumption, long molding cycle, difficulty in improving the performance of plastic products, high requirements for mechanical structure strength of equipment, and heavy structure. , easy to cause oil leakage and pollute the environment, provide an all-electric reverse mold movement and pulsating pressure-induced injection molding method that introduces pulsating pressure into the entire process of polymer plasticization, mold filling, and pressure holding

Method used

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  • Electrically driven reverse mold moving and pulse pressure inducing injection molding process and apparatus
  • Electrically driven reverse mold moving and pulse pressure inducing injection molding process and apparatus
  • Electrically driven reverse mold moving and pulse pressure inducing injection molding process and apparatus

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Embodiment

[0026] As shown in Figure 1, the polymeric material enters the barrel 16 from the hopper under the force of gravity. When plasticizing, the clutch 29 is closed, the clutch 27 is disconnected, the motor 28 drives the rolling spline shaft 22 to rotate through the synchronous belt 30, the rolling spline shaft 22 drives the screw 17 to rotate through the gear train 19, and the vibration generating device 20 works at the same time. 17. On the basis of circular motion, periodic axial vibration displacement is superimposed, so that the pulsating pressure caused by the mechanical vibration of the screw is introduced into the plasticizing process and acts on the melt, and plasticization is realized under the action of shear vibration and metering.

[0027] Hopper seat 18 is installed on the carriage 31, and carriage 31 can move along the guide rail on the support 38. And the rolling spline can move on the rolling spline shaft 22, so that the whole injection molding plasticizing device...

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Abstract

The present invention is electrically driven reverse mold moving and pulse pressure induced injection molding process and apparatus. During the injection molding, axial periodic vibration is superposed onto the rotating motion or linear motion of the injecting screw to result in pulsed displacement of the screw and the pulsed pressure consists of in the melt so as to realize the dynamic metering, the dynamic mold filling and dynamic pressure maintenance of polymer. By means of motor and lead screw driving device and reverse mold moving design, the process including electrically driven plasticizing, electrically driven injecting, electrically driven mold opening and closing, electrically driven mold regulation, electrically driven mold locking, etc is realized. The injection molding process and apparatus of the present invention is simple, reliable, low in power consumption, low in noise, high in product quality and environment friendship.

Description

technical field [0001] The invention relates to an injection molding method and device, in particular to an all-electric reverse mold shifting and pulsating pressure induced injection molding method and device. Background technique [0002] The most widely used injection machine at present is the traditional screw one-line injection machine, and its main power transmission system is a hydraulic system. The reasons for the principle are the following deficiencies: (1) Due to the retreat of the screw during plasticization, the effective length of the screw is shortened, which makes the mixing uneven, the radial and axial temperature differences of the melt in the metering cylinder are large, and the temperature distribution is uneven. Uniform, thus affecting the product quality. (2) The traditional plasticizing injection device requires high processing temperature when plasticizing materials, so the melt temperature is high, resulting in problems such as high energy consumpti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/17B29C45/46B29C45/50B29C45/66
Inventor 瞿金平吴宏武
Owner SOUTH CHINA UNIV OF TECH
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