The reasons for the high temperature of the injection molding machine
- The oil tank capacity is too small, the heat dissipation area is insufficient, and the cooling device has too small capacity.
- The fixed pump oil supply system with the oil pump capacity selected according to the fast forward speed will have most of the excess flow overflowing from the overflow valve under high pressure and generating heat during operation.
- The unloading circuit in the system fails or the unloading circuit is not set. When the oil pump stops working, it cannot unload. The entire flow of the pump overflows under high pressure, resulting in overflow loss and heat, leading to temperature rise.
- The system pipeline is too thin and too long, with too many bends, and the local pressure loss and along-the-way pressure loss are large.
- The component precision is insufficient and the assembly quality is poor, resulting in large mechanical friction loss during relative movement.
- The matching clearance of the mating parts is too small, or the clearance is too large after use and wear, resulting in large internal and external leakage, resulting in large volume loss, such as reduced volumetric efficiency of the pump and rapid temperature rise.
- The working pressure of the hydraulic system is adjusted much higher than the actual need. Sometimes it is because the seal is too tight, or the seal is damaged or the leakage increases, so the pressure has to be increased to work.
- The climate and working environment temperature are high, causing the oil temperature to rise.
- Improper selection of oil viscosity: high viscosity leads to high viscous resistance, while low viscosity leads to increased leakage. Both situations can cause heat and temperature rise.
Injection molding machine cooling method
- According to different load requirements, check and adjust the pressure of the overflow valve regularly to make it just right.
- Rationally select hydraulic oil, especially oil viscosity. If conditions permit, try to use a lower viscosity to reduce viscosity friction loss.
- Improve the lubrication conditions of moving parts to reduce friction loss, which is conducive to reducing workload and heat generation.
- Improve the assembly quality and accuracy of hydraulic components and hydraulic systems, strictly control the matching clearance of matching parts and improve lubrication conditions. Use sealing materials with low friction coefficients and improve sealing structures to reduce the starting force of the hydraulic cylinder as much as possible to reduce the heat generated by mechanical friction losses.
Contact Person: Alex Chu
WhatsApp/ WeChat: 0086 18968677763
Email: sc10@solidcomould.com
Website: www.solidcomould.com