Vietnam Capacity Precision Mold Joint Stock Company

The gate is placed according to the shape and structure of the product. It should be placed in an understandable position and does not affect the form of the plastic part. The gate must be placed on the assembly surface. Avoid higher surface requirements. The number of ports that require CAE flow analysis. The melt pumps directly into the core to bend the core. It also has an effect on the mold insertion department. Flow into the cavity or core curved flow. Avoid jet-offs. As illustrated: When the molten material enters the area where the thickness of the wall changes greatly. The front edge of the thin-walled area will slow down, even stagnate. Until it’s full of thick walls. Such gate design can cause sunken marks on the surface of the plastic part. Take the 90° tube mold, for example. AS figure A. Place the gate inside the elbow. The aim is to make the gate position of the mold suitable to the center of the mold to avoid the deviant gate of the mold. But the test results show that. Since the curved core is subject to the effect of the injection force, the core is pushed to the opposite side, so it is impossible to mold the tube. Place the gate position on the back of the elbow. Like Figure B. The number and location of the doors must satisfy the maximum flow length/thickness ratio into the tube. Avoid filling the difficult cavity. The melting process should be minimized and minimized in the direction of the flow to reduce energy losses. Each corner of the cavity can be filled with molten material at the same time. The plastic is melted at an optimal temperature. The gate position must be placed at the thickest part of the wall thickness of the product to facilitate the loading of the melting substance. Micro-minimized by the product, shrinking the vulnerability. For example, the gating system of the department is designed as a secondary port. The product is retained with gas. The gating system should be changed to a point gate. Top-down feeding facilitates ventilation and feeding. Molds should not be half structured. It has to be the whole cavity. Three-hole mold or hot running mold for two-point gate. The gate design is based on the plastic part structure to determine the level direction of the gate. Consider resistance and emission conditions during casting. Avoid welding lines on plastic parts. These 10 small details can prevent errors from occurring. Useful for inexperienced designers. Placing the gate properly can improve the quality of the plastic part. Avoid welds, dents,… in plastic parts. If you have questions about molding, please contact us.