In-mould hot-cutting dies are widely used in industrialized countries and regions in the world. This is mainly because the in-mold hot-cut mold has the following significant features:
1. In-mold gate separation is automated to reduce reliance on people. After the traditional plastic mold is opened, the product is connected to the gate. Two steps are required for manual shear separation. The in-mold hot-cut mold advances the gate separation to open. Before the die, eliminating subsequent processes is conducive to production automation and reducing dependence on people.
2. Reduce the artificial quality impact of the product; during the hot-die mold forming process in the mold, the automation of the gate separation guarantees the consistent appearance of the gate separation.
In-mold eager technology is introduced into the plastic industry, which reduces the manpower requirements of enterprises, shortens the product cycle, and simplifies the mold structure.
Maintenance costs have fallen, production stability has been strengthened, the human quality impact has been reduced, and corporate competitiveness has been significantly improved. Principle of in-mold eager cutting technology: Before the plastic mold is opened,
Cut or squeeze the gate, so that after the plastic mold is opened, the mold injection automation technology to achieve the separation of parts and materials. In-mold hot-cut technology is suitable for gate types: suitable for overlap gates,
Side-entry gates, sub-gates, horn gates, ring gates, and other forms of injection gates and other eager in-mold specific actions are introduced: injection molding is divided into three parts: injection (soft material) + holding pressure ( (Soft material) + cooling (hard material) When the product pressure is maintained (the material is not completely cooled), the cutter is ejected, and the product is separated from the nozzle, and the cutter is maintained in an ejected state until 2S before the product is cooled. The knife exits,
After the mold is opened, the product is separated from the nozzle. In-mold hot cutting system includes units: ultra-high pressure time control system + oil pipe (connecting time controller and mold) + miniature oil cylinder + cutter + contact switch. After plastic parts are usually injection-molded, the material head and the product are connected through the gate. Workers The gate needs to be trimmed, which is labor intensive and the gate trimming is not beautiful. The existing solution is to eject the cutter from the top plate to cut the gate when the mold is opened. Both of these methods cut the mold after the mold is opened.
Because the plastic has cooled at this time, the gate surface after cutting is not beautiful, and the product quality cannot be improved. It still needs multiple manual trims to trim the gates flat, and the labor intensity is still large, which increases labor costs. In-mold eager cutting is to cut or squeeze the gate before the plastic mold is opened, so that after the plastic mold is opened, the mold injection automation process that separates the parts and materials is realized.
In short, the in-mold eagerness is the automatic separation technology of the plastic head and the product.
Advantages of in-mold hot-cut mold:
1. Eliminating subsequent processes is conducive to production automation and reducing dependence on people.
2. Reduce the product's artificial quality impact; the automation of gate separation guarantees the appearance consistency at the gate separation,
The result is consistent quality parts, so many high-quality products on the market are produced by in-mold hot-cut molds.
3. Reduce molding cycle and strengthen production stability;
The automation of in-mold hot-cut molding avoids useless human actions in the production process, and the fully automatic mechanical shearing of the product ensures consistent quality, which has an incomparable advantage over traditional molds in the large-scale production process of the product.
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