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The temperature that the injection mold needs to pay attention to when molding
2024/05/09
Injection molds are relatively common plastic parts in factories. In order to make an injection mold, the temperature needs to be controlled, followed by the injection pressure and time. The birth of a good injection mold, in the manufacturing process, this All three points need to be taken into consideration, and all of them need to be done well.
The temperatures that need to be controlled in injection molding include barrel temperature, nozzle temperature and injection mold temperature. The barrel temperature and nozzle temperature mainly affect the plasticization and fluidity of the plastic; while the injection mold temperature mainly affects the filling and cooling solidification process.
1. The temperature of the barrel: The temperature distribution of the entire barrel should maintain a certain gradient, and it will gradually increase from the end near the hopper to the nozzle. One end of the hopper is mainly to preheat the plastic: the first half of the compression section is slightly lower than the melting point of the plastic, and the temperature of the second half is higher than the melting point of the plastic.
2. Nozzle temperature: The nozzle temperature is usually slightly lower than the temperature of the barrel to prevent the molten material from drooling at the nozzle. However, the temperature should not be too low to prevent the plastic from solidifying in the nozzle and blocking the nozzle or injecting the condensate into the cavity to affect the quality of the plastic part.
3. Injection mold temperature: The mold temperature refers to the surface wall temperature of the injection mold cavity in contact with the plastic part, which determines the filling ability of the melt, the cooling rate of the plastic part, and the internal and external quality of the molded plastic part. The injection mold is the point, and it cannot be sloppy.
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