What is gate?what types of gates do we use? Injection molding gate is the last opening that allows the molten plastic to flow into the cavities ,the most common gate types in injection molding include:Side gate/edge gate,Tab gate,Fan gate,Sub gate,Ring gate,Direct gate/sprue gate,Banana gate,Pin point gate,Hot runner(Point gate,Valve gate) Injection molding gate design and location […]
Gate system definition: The passageway between the beginning of the spure and the cavity. The gating system is composed of the sprue, runners, the gate and the cold slug well. Purpose: The purpose of the gating system is to inject the molten plastic, under high temperature, high pressure and high speed conditions, into
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Selection of plastic Injection mold steels Nowadays, plastic products are gaining increasingly wide popularity in our daily lives, of which injection molded ones account for about 80%. The plastic injection molding technology is widely applied in many fields, such as automobile, construction, household appliances, food and medicine, thanks to its one-time injection molding, accurate dimensions,
Plastics mold shrinkage refers to the percentage of the difference between the size of the plastic part at the molding temperature and the size after it is taken out of the mold and cooled to room temperature. It is a characteristic of thermoplastics that they expand after heating and shrink after cooling, and of course
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Definition & representation of parting surface Generally speaking, all molds are composed of two parts, the core and the cavity, while the parting surface is where the two meet when the mold is closed, or the surface that splits the workpieces or mold components in the mold. it will cause a witness line on the
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As the plastic material cools and shrinks, a plastic product is tightly wrapped around the mold core. In order to facilitate product release, an appropriate draft angle should be designed on the product surface that’s parallel to the release direction. The so-called draft angle refers to the inclination angle that should be designed on the
Sequential mold opening mechanism: There are nylon lock, EM lock and mechanical lock, mainly applicable to 3-plate molds, to control the mold opening sequence, and ensure that the core and the cavity don’t open when the switch plate bounces.
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Selection of Gate Types for Commonly Seen Plastic Products 1. Axially symmetric products, such as gears, blades and the like have a higher rotational speed during operation, so the surface should be smooth and flat without air bubbles, to ensure resistance to wear. Such products require that the functional surface (usually the sides) should not
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A good mold factory is able to create excellent quality mold , while guaranteeing a remarkable profit, so there must be something unique and special that make it stand out, e.g., a robust system, a highly efficient team, a super strong implementation capacity, as well as the spirit of innovation. This article mainly explains the
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The most basic costs of a plastic injection molding part mainly include: Raw material cost, mold sharing cost, equipment depreciation & sharing cost, processing (water & electricity) cost, labor cost, site rental and other overhead costs; Now we are going to analyze the cost structure of a plastic part with a specific example: Assumptions: Product:
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