Three strategies to solve the deformation problem of injection molding machine products
In the process of injection molding, product deformation is a common technical problem. It not only affects the appearance and dimensional accuracy of the product, but also may lead to functional failure or assembly difficulties. In order to help engineers and technicians effectively solve this problem, we introduce three main solutions: checking the mold temperature, adjusting the injection speed and pressure, and improving the cooling system.
1 、Check the mold temperature
Mold temperature is one of the key factors affecting the quality of injection molding products. The uneven mold temperature will cause the flow of plastic melt in the mold to be inconsistent, resulting in product deformation. Therefore, it is important to ensure that the mold temperature is evenly heated.
Temperature monitoring: The temperature sensor is used to monitor the temperature of each part of the mold in real time to ensure that the temperature distribution of the entire mold surface is uniform.
Preheat the mold: fully preheat the mold before the start of production to reach the set temperature to avoid the rapid cooling and uneven shrinkage of the plastic melt caused by the mold temperature being too low.
Temperature control system maintenance: Regularly check and maintain the temperature control system, including heating elements and cooling channels, to ensure that it works properly to avoid mold temperature abnormalities caused by equipment failure.
2、Adjust the injection speed and pressure
The control of injection speed and pressure is also important to reduce product deformation. Improper injection parameters will lead to uneven filling of plastic melt in the mold, resulting in internal stress, and then cause deformation.
Optimize injection speed: According to the characteristics of the material and the structure of the product, adjust the injection speed to avoid air involvement caused by too fast and melt cooling caused by too slow.
Control the holding pressure: set the holding time and pressure reasonably to ensure that the plastic melt can fully fill the mold cavity, while avoiding excessive pressure resulting in excessive internal stress of the product.
Step down: After the end of the pressure holding stage, gradually reduce the pressure to reduce the residual stress during product release and prevent deformation.
3、 Improve the cooling system
The efficiency of the cooling system directly affects the molding quality and production efficiency of the product. Insufficient cooling will cause the product to be too hot when demoulding and prone to deformation.
Cooling channel design: Optimize the layout of the cooling channel of the mold to ensure that the coolant can flow evenly through all parts of the mold to improve cooling efficiency.
Coolant flow and temperature: Adjust the flow and temperature of the coolant to adapt to the cooling needs of different products to avoid deformation caused by insufficient or excessive cooling.
Cooling time control: According to the thickness and material characteristics of the product, the cooling time is precisely controlled to ensure that the product reaches the appropriate hardness and stability before stripping.
4、In SUMMARY:
The product deformation of injection molding machine is a complicated problem, which needs to be analyzed and solved from many angles. By checking the mold temperature, adjusting the injection speed and pressure, and improving the cooling system, the occurrence of product deformation can be significantly reduced. These measures not only improve product quality, but also reduce production costs and enhance the market competitiveness of enterprises. Engineers and technicians should master these key technologies to ensure the stability and efficiency of the injection molding production process.
