Mould-closing mechanism of plastic injection molding machine

Abstract

The invention relates to a mould-closing mechanism of a plastic injection molding machine. The mould-closing mechanism mainly comprises a fixed mould plate, a moving mould plate, a pull rod, a back mould plate, a toggle mechanism, a mould-closing cylinder, a mould-adjusting device, mould-locking cylinders and a locking device, wherein the number of the mould-locking cylinders is four; each mould-locking cylinder is mainly composed of a mould-locking cylinder barrel, a mould-locking cylinder piston and a mould-locking cylinder piston rod; each mould-locking cylinder piston rod is a part of the pull rod; the mould-locking cylinder barrels are fixed on the fixed mould plate; and the four mould-locking cylinders are connected through channels. By adopting the mould-closing mechanism of the invention, the defects of the existing three-plate toggle type mould-closing mechanism and two-plate direct pressure type mould-closing mechanism can be overcome, the advantages can be fully absorbed when the mould is moved and locked; the mould-closing mechanism has excellent characteristics, simple structure and stable and reliable performance and can meet the demands of various types of injection molding machines; and the mould-closing mechanism is suitable for new products and can be used in the improvement of the existing three-plate toggle type injection molding machine.

Description

technical field [0001] The invention relates to a mold clamping mechanism, in particular to a toggle direct pressure mold clamping mechanism suitable for plastic injection molding machines. Background technique [0002] The mold clamping mechanism is one of the important parts of the plastic injection molding machine. Its function is to realize the opening and closing movement of the mold, so that the elastic deformation of the mold closing system can achieve the clamping force and lock the mold. [0003] The most commonly used mold clamping mechanisms for plastic injection molding machines are the three-plate toggle type and the two-plate direct pressure type. [0004] The three-plate toggle clamping mechanism drives the cross head of the toggle mechanism through the mold clamping cylinder, and realizes the movement of the template through the transmission of force and speed; The mechanism has not been arranged in a line (self-locking position), it will be affected by the ...

AI Technical Summary

Problems solved by technology

However, the pressure and speed required for the cylinder when moving the mold must be set in multiple stages according to the process requirements, and it does not have the force amplification function

For the typical clamping block type mold clamping mechanism, there is an action of the clamping block before the mold is locked, which not only has a complex structure, but also prolongs the cycle period and reduces the working efficiency

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