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Reasons and treatment methods of excessive temperature rise during use of injection molding machine

writer:LI SONG Share

The high temperature of the injection molding machine during use is one of the common problems for customers in use. The following is the reason analysis and treatment methods for the high temperature rise of the injection molding machine.

1. What are the reasons for the high temperature rise of the injection molding machine?
(1) The fixed pump oil supply system with the capacity of the oil pump selected according to the fast forward speed will cause most of the excess flow to overflow from the overflow valve under high pressure and generate heat during operation.
(2) The unloading circuit in the system fails or because the unloading circuit is not set, the oil pump cannot unload when it stops working. The entire flow of the pump overflows under high pressure, resulting in overflow loss and heat generation, resulting in temperature rise.
(3) The system piping is too thin, too long, excessively bent, local pressure loss and pressure loss along the way are large.
(4) The fuel tank volume is too small, the heat dissipation area is not enough, and the cooling device has too small capacity.
(5) Insufficient precision of components and poor assembly quality, and large mechanical friction loss between relative movements.
(6) The fitting clearance of the matching parts is too small, or the clearance is too large after use and wear, and the internal and external leakage is large, resulting in a large volume loss. For example, the volumetric efficiency of the pump decreases and the temperature rises quickly.

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(7) 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 because the seal is damaged or the leakage increases, the pressure has to be increased to work, or the BMC injection molding machine is selected for maintenance and inspection.
(8) The climate and working environment temperature are high, causing the oil temperature to rise.
(9) The viscosity of the oil is improperly selected, the viscosity is large, the viscous resistance is large, the viscosity is too small, the leakage will increase, and both cases can cause heat and temperature rise.

 2. How to deal with the high temperature rise of the injection molding machine?
(1) According to different load requirements, always check and adjust the pressure of the relief valve to make it just right.
(2) Reasonably choose hydraulic oil, especially the viscosity of oil. When conditions permit, try to use a lower viscosity to reduce viscosity friction loss.
(3) Improve the lubrication conditions of moving parts to reduce friction loss, which is conducive to reducing work load and heating.
(4) To improve the assembly quality and accuracy of hydraulic components and hydraulic systems, Guangdong BMC injection molding machine manufacturers recommend strict control of the matching clearance of matching parts and improve lubrication conditions. The use of sealing materials with a small friction coefficient and improved sealing structure to reduce the starting force of the hydraulic cylinder as much as possible to reduce the heat generated by the mechanical friction loss.

For more questions about injection molding machines, please pay attention to us.The manufacturers email:kevin@lisonginc.com. web:http://lisongmachine.com

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