plastic industry
In the point gate design of the vertical part direction, a radiation system appears on the surface of the part during injection molding. It’s composed of different color depths and glosses and it centers on the gate. And we call it the light line. There are roughly three manifestations of blanching, namely, dark lines
1. Liquidity The ability of the plastic in the molten state after being heated to fill the entire cavity under pressure is called fluidity. And it is generally tested with a professional fluidity test mold. The fluidity of plastics of the different grades of the same type is different. And plastic parts of
1. Description of shortcomings It refers to the injection molded parts that cannot meet the quality requirements of the original design and use during the injection molding process. A possible cause may be included when describing the shortcomings. For example, insufficient injection molding, that is, incomplete injection molding. It may be described as insufficient filling pressure of
1. Test steps A. Before testing the mold, check whether the mold is assembled and whether the raw materials are dried. B. Before changing the mold, spray the mold with anti-rust agent. Then, replace the mold and return to its position. Finally, fill in the record form. C. When loading the mold, align
The barrel and screw constitute the extrusion system. Like the screw, the barrel also works under the conditions of high pressure, high temperature, severe wear and corrosion. In the extrusion process, the barrel is also used to transfer the heat to or away from the material. Besides, barrel is also equipped with a heating
Introduction The gate is a critical section of the material flow channel in the gating system. Except for the main runner gate, most gates are the smallest part of the gating system with the smallest cross-sectional area, and its value is generally only 3%-9% of the cross-sectional area of the sub-runner. For the plastic
Poor gate cutting It refers to a phenomenon in which the gate connecting the molded product, the main runner, and the sub-runner is not easily cut off when molding with point gates. If you use point gates or latent gates, when the mold is opened and connected with products, the gates of the main
Plasticized components includes screw, melt barrel, rubber head, rubber ring, rubber gasket. When the injection molding machine is working, the plasticized components are like the wheels of a motor vehicle. So when the machine start working, the components will begin to subject to pressure, impact, friction, and extrusion. Therefore, to ensure that the injection molding machine is
Process principle: The mold is heated before and during mold clamping. After completing mold clamping, the injection will start when the temperature reaches the set conditions. The mold continues to maintain a high temperature during the injection process. So the rubber can maintain good fluidity in the mold during injection. After finishing the injection,
Failure analysis and troubleshooting methods The residual stress is too high. For the mold design and production, we can adopt direct gates with minimal pressure loss and higher injection pressure. We can change the forward gate to multiple pin point gates or side gates, and reduce the gate diameter. When designing a side gate, we can use a tab gate
