When the mold temperature is not high, resins whose material fluidity deteriorates significantly, such as polycarbonate PC, polyphenylene ether PPO, polyethylene terephthalate, commonly known as polyester resin PETP, etc., require the mold temperature to be heated to 80 degree or above (use a mold temperature regulator).
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Plastic gear parts injection molding process and material analysis. Plastic gears are developing toward larger sizes, more complex geometries, and higher strength, with high-performance resins and long-glass fiber-filled composites playing an important role. Plastic gears have experienced a change from new materials to important industrial materials in the past 50 years. Today they have penetrated
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In order to strengthen the hardness of the metal surface, many manufacturers will use the quenching process to promote the production of moulds, and the cracks generated after the quenching of the moulds are a defect in the heat treatment process *, which is likely to cause the processed moulds to be scrapped. What are
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Not enough (lack of glue) Process problems: plasticizing temperature is too low, nozzle temperature is too low, injection time is too short, injection speed is too slow, mold temperature is too low. Mold problems: the runner is too small, the gate is too small, the gate position is unreasonable, the exhaust is poor, and there
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Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of the injection molding method are fast production speed and high efficiency, the operation can be automated, there are many designs and colors, the shapes can be from simple to complex, and the sizes can be from
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Solutions to bubbles appearing during injection molding Causes and solutions of bubbles When the wall thickness of the product is large, the outer surface cools faster than the central part. Therefore, as the cooling proceeds, the plastic resin in the central part shrinks and expands toward the surface, causing insufficient filling of the central part.
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Two color mold design and injection should pay attention to matters include:
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The role of hot runner in plastic mold design Hot runner (HRS) is also called a hot water nozzle, which turns a solidified nozzle into a molten nozzle. Its composition is relatively simple and mainly includes a manifold, a hot nozzle, a temperature controller, etc. Among them, the manifold can be divided into I-shaped, The
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Plastic product structure design Key points of plastic product structure design Holes that are parallel to the opening direction of the mold are usually formed with a core (can be inlaid or extended) or by punching or inserting. Holes that are not parallel to the opening direction of the mold are usually made with rows
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Weld mark formation mechanism Weld marks (also called water lines) are intersection marks formed when molten plastic flowing out of gates at different locations in the mold converges. The reason for the formation of weld marks is that the temperature, pressure, and speed of the molten material flowing out of each gate are not completely
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