High-speed plastic-injecting dump energy pressure maintaining injection molding of plastic method

Abstract

The invention relates to a method of high-speed glue injection to energy storage pressure preserving plastic injection modeling. First of all, the energy storage glue injection generator of a glue injection energy storage tank and the energy storage pressure preserving generator of a pressure preserving energy storage tank are used to accumulate, then plasticizing is carried out in feed hopper components plasticizing screw bat; a moving half moves towards a fixed half; molds for plasticizing the screw bat move forward at a high speed and a low pressure; and glue stock quickly fills the molds. At the moment, the screw bat plasticized stops moving, the energy storage pressure preserving generator quickly switches to be opened to transfer higher injection pressure to accumulating pressure at a given speed. The glue stock in the mold cavity made by the above steps freezes the modeling through cooling down. The invention adopting the technics of the high-speed glue injection to energy storage pressure preserving plastic injection modeling, thus the reaction rate of the pressure preserving is over twice than that of general oil passages, thereby not only reducing the forming period of plastic products, but also decreasing the probability of failure products, and the method has high economic and social benefits.

Description

technical field [0001] The invention relates to an injection molding process for injection molding of plastic products during high-speed injection molding. Background technique [0002] In the injection molding process, the function of holding pressure is to prevent the molten rubber from reflowing during the cooling process, and to continue to replenish the undersaturated space caused by the cooling and shrinkage of the rubber, so as to obtain the best mold replication effect . If the holding pressure is set too low, it will easily cause the molded product to sag or have air bubbles, which will cause the molded product to shrink too much and cause dimensional instability. At the same time, gradually reducing the holding pressure during the holding process can reduce warpage, reduce shrinkage variation between the molded product areas from the gate to the end, reduce internal stress, and reduce energy loss. [0003] At present, in the process of high-speed injection moldin...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects existing in the injection process in the existing high-speed injection process, the technical problem to be solved by the present invention is to overcome the characteristics of slow response time and high energy consumption when the high-speed injection is transferred to the holding pressure, and provide a comprehensive utilization injection molding machine High-speed and efficient production of plastic parts with its own equipment and common energy storage generating devices

Images