Injection mould servo synchronous automatic thread demoulding mechanism and control method thereof

Abstract

The invention discloses a servo synchronic automatic thread demoulding mechanism for an injection mould. The thread demoulding mechanism comprises a mould frame, a fixed molding board, a push board, a movable molding board, a threaded core and an injection molded part, wherein the threaded core and the push board are in transmission connection with a rotation mechanism and a lifting mechanism respectively. Under the control of a control system, the rotation mechanism screws out threads at an axial speed consistent with a speed at which the lifting mechanism pushes out the push board. The thread demoulding mechanism adopts a stepper motor for thread demoting and a novel mould thread demoulding synchronization mechanism under servocontrol to solve a current quality problem caused by lack of synchronization during thread demoulding. The thread demoulding mechanism is adaptive to different thread pitches and different plastic workpiece materials, overcomes the limitation on the prior mechanical thread demoulding mechanism and has obvious advantages in technology, good using value and market prospect. The thread demoulding mechanism has the advantages of simple and reasonable structure, high efficiency, high quality, convenient operation and wide application range.

Description

technical field [0001] The invention relates to a thread removal mechanism of an injection mold, in particular to a servo synchronous automatic thread removal mechanism of an injection mold and a control method thereof. Background technique [0002] In plastic molds, it is a commonly used thread removal method to use an electric motor or an oil motor to drive a gear for automatic thread removal. There are similarities in the mechanisms and related structures of these unthreaded parts. The disengagement of the thread is realized by two functions. As shown in Figure 1, the push plate 200 realizes the thread stop and the auxiliary release of the parts, and the rotatable core 400 rotates and exits. thread. However, a common problem in these automatic thread removal mechanisms is that the ejection speed of the push plate 200 is inconsistent with the axial speed at which the threaded core 400 rotates out of the threaded part of the part 100, causing damage to the threads of the p...

AI Technical Summary

Problems solved by technology

This structure drives the rotation of the core and the rise of the movable platen through the synchronous rotation of the screw rod and the screw nut, and realizes the automatic demoulding of the plastic parts with threads in the injection mold. The dynamic connection relationship, the pitch of the screw rod and the screw nut, and the number of teeth of the driven gear fixed to the rear end of the screw nut and the driven gear on the core are fixed values. Therefore, the applicable range of this structure is small and the precision is low.

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