Mold opening and closing device and control method of electro-hydraulic hybrid injection molding machine

Abstract

The invention provides a mold opening / closing device for an electric-liquid hybrid injection molding machine. The mold opening / closing device comprises a rear template, a movable template, a servo motor, a high-pressure hydraulic oil generator, a ball screw and mold moving rods which axially and linearly move under the drive of the ball screw, wherein the mold moving rods are respectively positioned at the middle end and the rear end of the rear template to be linked with the servo motor, the front ends of the mold moving rods are connected with the movable template, a high-pressure oil cylinder and a high-pressure piston rod are arranged on the rear template, a mold-closing high-pressure oil chamber and a mold-opening high-pressure oil chamber are formed between the front side and the rear side of the high-pressure piston rod and the high-pressure oil cylinder, a pipeline of the high-pressure hydraulic oil generator is communicated with the mold-closing high-pressure oil chamber and the mold-opening high-pressure oil chamber respectively, the front side of the high-pressure piston rod is provided with a braking plate which tightly brakes the mold moving rods by means of hole shrinkage and a stretch controller which controls the braking plate to radially move, and the braking plate pushes against the high-pressure piston rod when the mold moving rods are tightly locked. The mold opening / closing device provided by the invention is simple in structure, short in motion period, high in mold opening / closing speed, stable in running, and accurate and controllable in mold-closing force, and is suitable for a mold-closing mechanism for the electric-liquid hybrid injection molding machine.

Description

technical field [0001] The invention relates to an injection molding machine, more specifically, to a rapid mold opening and closing device and a control method for an electro-hydraulic hybrid injection molding machine. Background technique [0002] At present, the mainstream mold opening and closing structure of all-electric injection molding machines in the market is still the traditional five-point mechanical hinge structure. The elbows of this mold opening and closing structure are distributed on both sides of the template, and the clamping force and The linear movement speed of mold opening and closing. The advantage of this structure is that the linear movement speed is fast and the clamping force amplification ratio is high. The disadvantage is that there are many parts, the structure and the toggle movement are relatively complicated, and the toggle linkage is easy to bite. And if its structure is driven by a servo motor, once the electrical components fail, the torq...

AI Technical Summary

Problems solved by technology

However, the mold clamping structure of SPT is relatively complicated. How to realize the electro-hydraulic hybrid injection molding machine to provide hydraulic precision mold clamping force while simplifying the mold clamping structure is a difficult problem that needs to be solved urgently.

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