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Patent Searching and Data


Title:
PLASTIC PART FORMING METHOD USING HOT RUNNER MOLD DRIVEN BY ELECTRIC SERVO
Document Type and Number:
WIPO Patent Application WO/2022/148247
Kind Code:
A1
Abstract:
Disclosed is a plastic part forming method using a hot runner mold driven by an electric servo, comprising: first designing a plastic part forming mold, a mold cavity being formed in the mold; providing sprues on the plastic part forming mold, a sprue valve needle and a servo motor being respectively provided corresponding to each sprue, wherein the servo motor controls the corresponding sprue valve needle to extend out or retract back, so that the melt flows slowly into the cavity through the sprues; and finally, performing pressure maintaining, cooling, die sinking and demolding to obtain the product. The significant effects of the present invention are that: the speed and position of the sprue valve needle controlled by the servo motor can be adjusted, the accurate segmented control can be achieved without being affected by an unstable air pressure or a poor sealing performance in an oil pressure, and thus the control of the multi-point hot runner is not delayed, thereby having an obvious effect on adjustment of the defects such as warping and deformation caused by the temperature difference line, welding line and excessive stress of the plastic product, so that the appearance of the plastic product is easy to guarantee, and the present invention is very suitable for forming control of a multi-cavity mold plastic product with high requirements.

Inventors:
HU XUECHUAN (CN)
LI LI (CN)
ZHOU JIANJUN (CN)
ZHAO YIXIANG (CN)
ZHAO BING (CN)
LUO GANG (CN)
LI XIAOFAN (CN)
Application Number:
PCT/CN2021/140814
Publication Date:
July 14, 2022
Filing Date:
December 23, 2021
Export Citation:
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Assignee:
CHONGQING PINGWEI AUTO PARTS CO LTD (CN)
International Classes:
B29C45/27; B29C33/38; B29C45/28; B29L31/30
Foreign References:
CN112873747A2021-06-01
CN103496128A2014-01-08
CN111079338A2020-04-28
Attorney, Agent or Firm:
CHONGQING WEIXIN INTELLECTUAL PROPERTY LAW OFFICE (GENERAL PARTNERSHIP) (CN)
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