Injection molding machine filter replacement guide

1、 Five step method for replacing filter element Changing the filter element of an injection molding machine is like changing the oil of a car, simple but skillful: Shutdown pressure relief: After turning off the power, open the pressure relief valve to discharge residual molten material Dismantling the casing: Use a specialized wrench to rotate the filter cover counterclockwise, paying attention to catching any dripping plastic Remove the old core: Record the installation direction of the filter element to avoid installing the new filter element backwards Cleaning the chamber: Use a copper brush to clean the carbon deposits on the filter seat, and avoid using sharp tools New installation test: The new filter element needs to be soaked before installation, and the pressure gauge fluctuation should be observed after turning on the machine

2、 Secret to Maintaining and Extending Life The filter element is the "kidney" of the injection molding machine, and these habits can make it work for an additional 200 hours: Check the pressure difference every week and replace it immediately if it exceeds 50pa If the shutdown exceeds 8 hours, the molten material needs to be emptied to prevent cooling and crystallization Using specialized filter cartridges for different raw materials and mixing them can cause deformation of the pore size The spare filter element needs to be sealed and stored to avoid moisture and deformation

3、 Guide to choosing and avoiding pitfalls A good filter element depends on three "invisible indicators": Structural strength: More resistant to high-pressure impact with stainless steel support mesh Gradient filtering: Multi layer gradient filtering has a 30% higher interception efficiency than single-layer filtering Interface material: Copper alloy sealing ring is more resistant to high temperature aging than rubber For precision injection molding requirements, a 0.5 ㎡ large filtration area model can be considered, with a 31mm inlet and outlet diameter suitable for most models, a 20um precision balance efficiency and flowability, and a 50MPa pressure design to meet high-strength working conditions.

The above:Method for adjusting pressure of gear oil pump pressure gauge for CNC machine tools