Die opening and closing device for plastic product molding machine

Abstract

A die opening and closing device for a plastic product molding machine comprises a die carrier base, a left movable die carrier, a right movable die carrier, a left clasping arm, a right clasping arm and a clasping arm driving mechanism, and is characterized in that the clasping arm driving mechanism comprises a motor, a reduction gearbox, a swing arm, a driving shaft, a coil spring box, a coil spring foot positioning shaft sleeve, a limit ring, a pull rod and a coil spring box stirring block; the motor works together with the reduction gearbox; the left end of the swing arm is placed on the driving shaft in a sleeving manner, a guide block is arranged in the middle of the front side of the swing arm, and the right end of the swing arm is hinged to the left end of the pull rod; the right end of the pull rod is hinged to the lower end of the right clasping arm; the driving shaft is supported at the lower end of the left clasping arm; the coil spring foot positioning shaft sleeve is positioned in the coil spring box; a coil spring is arranged in the coil spring box; a coil spring box cover is arranged at the open part of the front side of the coil spring box; a limit ring seat is arranged on the front side surface of the coil spring box cover; a notch is formed in the limit ring seat; the limit ring is arranged in a limit ring seat chamber; a limit block is arranged on the limit ring; the coil spring box stirring block is fixed on the rear side of the coil spring box and matched with the guide block. According to the die opening and closing device, the die opening and closing speed is increased, and the molding efficiency is improved; a die locking device is not required to be additionally assembled; the structure is simplified.

Description

technical field [0001] The invention belongs to the technical field of plastic product forming machinery, and in particular relates to a mold opening and closing device of a plastic product forming machine. Background technique [0002] The plastic products mentioned above mainly refer to but are not absolutely limited to hollow plastic products, such as various plastic containers, palletizing barrels and even trays (trays such as CN102407967B, CN103253442A and CN102009774B), etc. [0003] As known in the industry, a plastic product molding machine needs to perform a mold opening and closing action every time a product is formed. For this, please refer to CN2481510Y (structure-improved mold opening and closing mechanism), CN2481511Y (opening and closing mold mechanism), CN101890772B (opening and closing mold mechanism) , mold clamping mechanism), CN101890805B (magnetic mold clamping device for hollow plastic product molding machine), CN102357948A (elbow type mold opening and...

AI Technical Summary

Problems solved by technology

Moreover, the technical information of various motor-driven mold opening and closing devices can be seen in the published Chinese patent documents, such as authorized announcement numbers CN202097949U (a motor-driven mold opening and closing mechanism) and CN202053507U (motor-driven mold opening and closing mechanism). Although each of the two patents can realize the technical effects recorded in the technical effect column of their descriptions, the complex structure is their shortcoming. In particular, because they do not have the mold locking function, a booster mechanism needs to be installed separately (see paragraph 0029 of the descriptions of the two patents). , so there is no technical inspiration for designing the mold opening and closing device of the plastic product molding machine with a relatively simple structure and is directly driven by the motor

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