Reset device of injection molding machine

Abstract

The invention discloses a reset device of an injection molding machine, which relates to the technical field of machinery manufacturing of plastic. The reset device comprises a stripper plate between a fixed plate and a moving die plate; a driving cylinder on the fixed plate is connected with the stripper plate; a push plate is arranged between the moving die plate and a moving die; ejector pins, which penetrate into moving die guide holes, are arranged on one side of the push plate which is connected with the stripper plate by ejector rods; a plurality of threaded holes are formed in the stripper plate; a section of thread is formed on one end of each ejector rod which is connected with the stripper plate by the thread. Compared with the prior art, the reset device has the advantages that the ejector rods are in threaded connection with the stripper plate which is pulled to move to reset towards the fixed plate by a piston rod of the driving cylinder when the die is closed, the ejector rods and the push plate are driven together to move to reset by the stripper plate, and the ejector pins moves to reset along with the push plate, so that the collision between the ejector pins and a fixed die is avoided. The reset device has the advantages of balance and accuracy in reset of the ejector pins, high reset speed and high production efficiency.

Description

technical field [0001] The invention relates to the technical field of plastic machinery manufacturing, in particular to a reset device used for an ejection mechanism of an injection molding machine. Background technique [0002] Injection molding machine is the main molding equipment for making thermoplastic or thermosetting materials into various shapes of plastic products using plastic molding molds. The function of the ejector mechanism is to eject the molded plastic products out of the mold and take out the products smoothly; in the mold When the mold is closed, the ejector mechanism can be reset quickly and accurately. There is a reset device for an injection molding machine. The reset device for the injection molding machine includes a stripper plate arranged between a fixed plate and a movable platen, and a drive cylinder mounted on the fixed plate is connected to the stripper plate. A push plate is arranged between the movable platen and the movable mold, and one s...

AI Technical Summary

Problems solved by technology

The reset device of this injection molding machine has the following disadvantages in the production process: since the ejector rod is inserted in the limit blind hole of the stripper plate, when the mold is closed, the piston rod of the drive cylinder pulls the stripper plate to move toward the fixed plate to reset , the ejector rod is separated from the ejector plate. When the movable mold and the fixed mold are closed to a certain position, the fixed mold and the reset rod are in contact and the reset rod is pushed to drive the push plate and the thimble to reset; it is easy to cause the thimble to collide with the fixed mold and be damaged. phenomenon, and the thimble reset is unbalanced, inaccurate, and the reset speed is slow, resulting in low production efficiency

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