Thin-wall injection molding mold with continuously-variable cavity size

Abstract

The invention provides a thin-wall injection molding mold with the continuously-variable cavity size and belongs to the field of design and manufacturing of injection molding molds. The thin-wall injection molding mold comprises a fixed mold plate, a movable mold plate, a movable mold insert, cavity sliding plates, T-shaped sliding blocks, a guiding chute and feeding screws. The T-shaped sliding blocks are arranged on the two sides of the movable mold insert respectively and slide along the guiding chute, and then the cavity sliding plates connected with the T-shaped sliding blocks are driven to move; and the continuously-variable cavity length is achieved, and feeding of the T-shaped sliding blocks is controlled through the feeding screws. A plastic part is pushed out through push rods, and the number of the push rods actually pushed out of the plastic part continuously changes along with motion of the cavity sliding plates. Multiple sets of rectangular through holes are preformed in the cavity sliding plates, the push rods not pushed out of the plastic part are normally pushed out, and therefore the push rods are prevented from interfering with the cavity sliding plates. When the mold is used, the cavity size can be online and continuously adjusted, and a series of products in different sizes can be produced through the same mold. The defects that in a traditional manner, operation of disassembling a mold and replacing a movable mold insert is complex, and cost is high are avoided.

Description

technical field [0001] The invention belongs to the field of design and manufacture of injection molds, and relates to a thin-wall injection molding mold with continuously variable cavity size. Background technique [0002] Thin-walled plastic parts are widely used in electronic appliances, home appliances, automobiles, aerospace and military products due to their advantages of material saving, volume reduction and cost reduction. Injection molding has become the most suitable technical method for mass production of thin-walled plastic parts due to its low cost and high efficiency, and the serial production of products has put forward new requirements for mold design and manufacturing technology. [0003] Taking typical thin-walled plastic parts such as microfluidic chips and light guide plates as examples, in order to meet market needs, it is necessary to design and produce a series of products with different specifications and sizes, and a corresponding series of molds are...

AI Technical Summary

Problems solved by technology

In the past, it was possible to change the size of the cavity by replacing the cavity insert, but each time the cavity insert needs to be disassembled and assembled, the operation is complicated and time-consuming

In addition, the adjustment of the cavity size by this method is discontinuous, and the more size points are adjusted, the more cavity inserts are required, which increases the cost of the mold accordingly

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