Multilayer-injection molding stepped mold device

Abstract

The invention discloses a multilayer-injection molding stepped mold device. The multilayer-injection molding stepped mold device comprises a bearing base; the upper surface of the bearing base is fixedly connected with a machining box; a movable mechanism is arranged on the lower surface inside the machining box; an injection molding mechanism connected with the movable mechanism is arranged inside the machining box; a traveling and fixing mechanism is disposed on the lower surface of the bearing base; a clamping and discharging mechanism which is in lap joint with the injection molding mechanism is arranged on the upper surface of the machining box; a group of stretching bars matched with a rotary shaft A are fixedly connected with the upper surface inside the machining box; and the lower end surface of each stretching bar is provided with a fixing round ring connected with the rotary shaft A. The multilayer-injection molding stepped mold device has the beneficial effects that the material cost and the machining cost are effectively reduced, meanwhile, the finished product rate and the production efficiency are greatly improved; and driving is reliable, ejecting is smooth, the size of a mold frame is greatly reduced, the mold space is reasonably utilized, and the mold device is convenient to observe and move.

Description

technical field [0001] The invention relates to the field of plastic injection molds, in particular to a stepped mold device for multi-layer injection molding. Background technique [0002] Since the molding cycle of plastic parts is proportional to the wall thickness, the thicker the wall thickness, the longer the molding cycle, and the solidification speed of the thicker injection molding area will be significantly slower than that of the thinner area, and premature solidification will affect the pressure of the melt Transfer, which affects the accuracy of injection molding production. On the other hand, the cooling time of thick-walled parts is long and the efficiency is low. At the same time, the relatively long residence time will increase the risk of material decomposition. Therefore, thick-walled transparent parts are produced by multi-layer injection molding. [0003] Multi-layer injection molding is to divide the part into multiple layers and perform injection mol...

AI Technical Summary

Problems solved by technology

However, the current multi-layer injection molding generally adopts the principle of two-color injection molding, designs multiple sets of core structures, and injects them layer by layer by rotating the movable mold or in multiple sets of molds. The cost of the mold is high, and the yield is low. The product that comes out still has a certain temperature, and it is easy to bur

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