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1. Analysis and work process of the original mold structure
According to the mold structure , the mold shelf uses standard BI type. The division surface of the product is at the steps. When the forming threading plastic parts, first put the active core into the mold. After the forming, the plastic parts and the active core are taken out of the mold, and then rotated out of the active core. Threading plastic parts. This modeling method is simple, but the production efficiency is low, and the working strength of operators is large, and it is only suitable for small batch production. In the process of production, the mold cannot be used directly to push out the mold. The operator must take out the product by manual method. This is difficult to guarantee the appearance requirements of the product. The main thing is that the production efficiency is low, thereby increasing the cost of production. Through the analysis of mold structure and product structure, according to the customer's requirements for the product, combined with the actual situation of processing, we transformed the mold structure.
Original mold structure diagram
1-Positioning volume 2-Putting mouth 3-fastening screw 4-fixed mold board 5-fixed template
6-thread activity core 7-movement template 8-J pole 9-support block 10-] Nodes fixed board
11-J Specifiex bottom 12-garbage nails 13-moving mold seat board
具. The modified mold structure and working principle
The modified mold is roughly the same as the original design of the mold, and its main difference is made by the top structure of the mold. It turned out that the mold of the screw plastic parts first put the active core into the mold. After forming, the plastic parts and the active core are removed from the mold, and then rotated out of the active core to get the plastic parts with inner threads. Relying on the gear with a motor, the gear is then driven by the thread core, and the thread core rotates through the gear to achieve the inner thread automatic threading mechanism mold. For the internal thread release agency, the outer surface or end surface of the plastic parts must be designed. Use a rotation method to take off the thread, the plastic parts and the thread core or ring, in addition to the relative rotation, must also have axial movement. If the thread core or type ring is rotated, the plastic parts rotate together, the plastic parts cannot be removed from the thread core or type ring. To this end, special attention should be paid to the design of plastic parts, and the plastic parts must have a stop -rotating structure.
3. The main points of mold manufacturing
(1) Due to the filling and flow of plastic in the work, the mold must withstand greater compression and friction. The basic performance of mold -type cavity steel requires sufficient surface hardness and abrasion resistance.
(2) The thread core and the transmission shaft should be selected (such as 42CRMO) with good stability and good thermal stability.
(3) The limit of the thread -type core rotation should be used for the step end surface, and the cone surface limit should not be used.
(4) The threading of the thread -type core and the thread inlaid of the nut.
(5) The transmission of the threading mechanism is smooth. The material of the gear should have good strength and abrasion resistance, and the combination of gears and the transmission shaft should be good.
(6) In order to make the transmission stable, under the strength of the gear, try to take more tooth numbers and smaller modular numbers.

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If you can't find a product on our website or catalog, We deal with over 10,000 items, our catalog doesn’t cover all products. And we are developing 100+ molds yearly, which means around 10 new products are created in our factory. So don’t go away, just send us your photo or part no, we’ll check for you.