The Design of the Thread-Removing Mechanism of Injection Mold

The design of the thread removal mechanism of the injection mold, Shanghai Mulan Precision Mold Processing Factory stated that the thread removal mechanism is used to remove the injection molded parts with internal and external threads, and its mechanism has the forms of manual thread removal, mechanical thread removal and hydraulic thread removal; The threaded insert rod can also be used to form the threaded hole of the injection molded part. After the insert rod and the injection molded part are released from the mold at the same time, an electric screwdriver can be used to take out the threaded insert rod.





1. Manual unthreading rack


The injection molded parts in the manual unthreading rack are stopped by gate condensate or wrench. When the injection mold structure needs to be simplified, manual unthreading is used, which is only suitable for single-piece and small-batch injection molding production. , the unthreading frame is a universal manual unthreading device. When in use, the injection mold is installed together with the thread-removing frame, the tail of the threaded core is installed in the joint, and the injection molded part can be demoulded from the threaded core by shaking the shaft by hand. The joint can have many forms, and the thread of different injection molded parts can be removed by exchanging the joint.


2. Manual loose block demoulding mechanism


The manual loose block demoulding mechanism first releases the injection molded part and the threaded core from the injection mold at the same time, and then manually takes out the injection molded part from the threaded core outside the mold. When using loose blocks to form injection molded parts, it is necessary to prepare a sufficient number of loose blocks to ensure cycle work.





The design of the dethreading mechanism of the injection mold, and the injection molded parts are formed in the injection mold. After the mold is opened, the ejector rod of the injection machine pushes the push plate, and the wedge plate moves to the demoulding direction. Under the action of the wedge plate and the movable plate, Shanghai Mulan Precision Mold Processing Factory withdraws the bayonet pin from the threaded annular groove. after. Then push the injection molded part and the threaded core out of the movable mold at the same time with the push rod, and take out the threaded core from the injection molded part by hand outside the mold.


3. Rack and gear pair dethreading mechanism


The mechanism relies on the mold opening movement to make the rack drive the cylindrical gear and the shaft to rotate, and the shaft can also be rotated manually, so as to realize the ejection of the injection molded parts and the pouring system condensate. When using this mechanism, it should be noted that the screw direction and pitch of the injection molded parts and the pouring system must be the same. When the mold is opened, the rack drives the cylindrical gear, and through the rotation of the shaft and the bevel gear, the cylindrical gear makes the threaded core and the pulling rod rotate and come out according to the direction of rotation. The injection molded part is braked by the gate gel, and at the same time, the injection molded part and the gating system gel can be demoulded. The mechanism can also be manually operated to rotate the shaft to demould the injection molded parts and the pouring system condensate.





4. Hydraulic drive rack and pinion dethreading mechanism


The design of the thread removal mechanism of the injection mold. After the mechanism of Shanghai Mulan Precision Mold Processing Factory opens the mold, the piston of the hydraulic cylinder pushes the rack, and then the thread core rotates in the direction of rotation through the transmission of the double gear and the gear to come out of the injection molding. Parts, injection molded parts rely on gate condensation to stop. The thread removal mechanism is an indispensable mechanism for injection molded parts with thread structure. Without this mechanism, the internal and external threads of injection parts cannot be thread removed, which will affect the molding of injection parts with thread structure. There are many types of thread removal mechanisms, and which thread removal mechanism to use depends on the batch size of the injection molded parts, the structure of the thread, and the size of the injection mold. Specifically, it can be searched according to the relevant injection mold mechanism design manual, or it can be designed according to the molding requirements of injection molded parts and the structural characteristics of injection molds.