Industry · Plastic Injection Molding
From mold cooling channels to hydraulic units, from chiller lines to pneumatic systems: filtration engineering that determines dimensional accuracy and equipment life.
6–12 mm
Mold cooling channels prone to clogging
25–50 µm
Filter rating at chiller inlet
ISO 16/14/11
Target cleanliness class for hydraulic oil
Critical points
In injection molding, blow molding and thermoset molding, final product quality depends largely on how evenly the mold cools. Scale, biofilm or particle clogging in the cooling channels creates temperature differences on the mold surface, which show up in the product as shrinkage, warping and dimensional deviation. Invisible contamination in the hydraulic system silently wears down precision valves and pumps.
Mold cooling channels are typically 6–12 mm in diameter, and these narrow cross-sections are highly prone to clogging. Scale in the water forms an insulating layer on the channel walls and reduces heat transfer, while biofilm narrows the channel and restricts flow. Both prevent uniform cooling and lengthen cycle times. Keeping cooling water within the target parameters of TSS < 50 mg/L and hardness < 200 mg/L CaCO₃ is the basic condition for controlling these risks.
Solution: Particle and scale control in cooling water
Scale and biofilm that build up on the evaporator surface reduce the heat transfer coefficient, so the chiller uses more and more energy to reach the target cooling temperature. 25–50 µm filters at the chiller inlet and automatic backwash filters in the cooling tower circuit protect this equipment.
Solution: 25–50 µm chiller inlet and backwash filters
Invisible particles between 5 and 15 microns have an abrasive effect on proportional and servo valves, degrading precision and causing seizure. Regularly monitoring oil cleanliness to ISO 4406 and keeping it at ISO 16/14/11 or better directly affects valve life and machine repeatability.
Solution: ISO 4406 monitoring and precision filtration
Cooling and hydraulic circuit
Select a stage on your line to see the Prosestim filters and micron range used at that point.
01 · Backwash
Automatic backwash filters in the cooling tower circuit separate the dust and sediment entering the open circuit without interrupting the flow.
02 · 25–50 µm
25–50 µm filters at the chiller inlet prevent buildup on the evaporator surface and keep energy consumption in balance.
03 · TSS < 50 mg/L
Cooling water targets of TSS < 50 mg/L and hardness < 200 mg/L CaCO₃ prevent narrow channels from clogging and reduce the risk of shrinkage and warping.
04 · ISO 16/14/11
Particles of 5–15 microns cause wear and seizure in servo valves; oil should be kept at ISO 16/14/11 or better.
05 · Moisture · oil aerosol
Moisture and oil aerosols from the compressor outlet build up in pneumatic valves and increase the risk of failure; coalescer filters separate moisture and oil.
This stage is your existing equipment. Let’s design the earlier stages together; our engineers will recommend the right filter.
Let’s define a solution for this stage of your line together with our engineers. Write to us
Applications
The same filtration principles apply across applications, with different material and micron choices.
Mold cooling water and channel protection.
Cooling circuit and chiller protection.
Valve safety and ISO cleanliness class.
Dust and sediment control in open circuits.
Products used in this industry
Each product page lists the micron range, material compatibility and operating conditions.
Self-cleaning filter housing, 10–3,000 µm, that cleans itself without stopping the line; no cartridge changes, no downtime
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100% pure PP, binder-free melt-blown cartridge filter (sediment filter); 1–150 µm for RO pre-filtration and process water
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String-wound cartridge filters in 8 media including PP, cotton and glass fiber, 0.8–150 µm, 5″–40″ lengths
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High flow cartridge filter, 0.5–100 µm, 10″–60″ lengths; equivalent options compatible with 3M and Pall housings
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Ultrasonically welded polypropylene felt bag filter, 1–200 µm, resistant to pH 1–14; for chemical, paint and water lines
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Stainless steel cartridge filter housing with AISI 304L/316L/316Ti body and 1–60 cartridge capacity
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