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Fully-electric ultra-high speed injection molding PVT (Pressure Volume Temperature) online measurement and control method

A technology of injection molding, measurement and control method, which is applied in the field of ultra-high-speed injection molding measurement and control to achieve the effect of high control precision and high cost performance

Inactive Publication Date: 2012-08-22
BEIJING UNIV OF CHEM TECH
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  • Application Information

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Problems solved by technology

The purpose of the present invention is to solve the molding defects caused by the drastic changes of the polymer melt during the ultra-high-speed injection molding process, and to provide an all-electric ultra-high-speed injection molding PVT online measurement and control method with high control precision and high cost performance

Method used

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  • Fully-electric ultra-high speed injection molding PVT (Pressure Volume Temperature) online measurement and control method
  • Fully-electric ultra-high speed injection molding PVT (Pressure Volume Temperature) online measurement and control method
  • Fully-electric ultra-high speed injection molding PVT (Pressure Volume Temperature) online measurement and control method

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Embodiment Construction

[0019] Such as figure 1 As shown, the test scheme of the all-electric ultra-high-speed injection molding PVT online measurement and control method of the present invention is mainly composed of an injection mold 1, an injection system 7 and a frame 10; a mold high-precision temperature sensor 2 and a mold high-precision pressure sensor 3 are installed on the injection mold In the cavity of the mold 1, the temperature and pressure in the cavity are detected; the barrel high-precision temperature sensor 4 and the barrel high-precision sensor 5 are installed at the front end of the barrel 6 to detect the temperature and pressure of the melt at the head of the barrel; displacement The sensor 9 is arranged at the end of the injection screw 8 to detect the position of the screw.

[0020] Such as figure 2 As shown, the control principle of the all-electric ultra-high-speed injection molding PVT online measurement and control method of the present invention is to use the melt after ...

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Abstract

The invention discloses a fully-electric ultra-high speed injection molding PVT (Pressure Volume Temperature) online measurement and control method. By using a melt metered through plasticization in a cylinder as an object, a thermodynamic state (P0, T0, V0) of a highly-compressed melt before injection as a control starting point and the thermodynamic state (P1, T1, V1) of the melt in the cylinder after injection molding as a control ending point, through online detection of a PVT relation characteristic of a polymer in an ultra-high speed injection molding process, by depending on a high-pressure control system and a high-response executing mechanism of a fully-electric ultra-high speed injection molding machine and using the PVT relation characteristic of the ultra-high speed injection molded polymer as the guidance, precision control of ultra-high speed injection molding is realized. The fully-electric ultra-high speed injection molding PVT online measurement and control method has the advantages of high control precision and high cost performance.

Description

technical field [0001] The invention relates to an ultra-high-speed injection molding measurement and control method, which belongs to the field of polymer material molding processing. Background technique [0002] In the fields of aerospace, biomedical engineering and consumer electronics, the urgent requirements of "ultra-light, ultra-thin, and ultra-precision" for injection molded products have been put forward. Conventional injection molding can no longer meet the molding requirements. Ultra-high-speed injection molding is widely used. Production of thin-walled precision injection molding products such as bare boards and microfluidic chips. Ultra-high-speed injection molding requires injection molding equipment to provide ultra-high injection speed and high injection pressure, stable plasticizing quality, high control precision and wide controllable range. In addition, the injection molding machine is required to be stable throughout the molding process. [0003] Gener...

Claims

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Application Information

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IPC IPC(8): B29C45/77B29C45/78B29C45/76
Inventor 谢鹏程郭小龙何雪涛丁玉梅杨卫民
Owner BEIJING UNIV OF CHEM TECH
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