CH 
II. Common Fault Analysis and Trouble Shooting for Wet Extruders
Font: Large Small Date:2013/05/30
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Trouble
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Cause
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Solution
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The powder is too rough.
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Die hole die is too large, or too larger the aperture ratio.
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Reduce the diameter of the die hole, reduce aperture ratio.
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The powder cannot be discharged.
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The feeding amount is too large while the water pressure and water flow is too small.
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Adjust feeding flow and make sure of the water pressure
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The feed is pasted.
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There is too much water.
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Adjust the flow
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The pellet is too large; the temperature of the extruded powder is too low.
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The screw sleeve, screw rod or die head are badly worn out.
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Replace screw rod, screw sleeve or die head
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No feed being discharged during normal operation.
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The discharge hole is blocked by impurities.
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Remove the impurities inside the die hole
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The feed has unequal sizes.
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The die hole has unequal sizes.
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Equip die hole of proper size
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The extruded pellet has unequal lengths.
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The cutting speed is too high or too low.
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Adjust the speed of the cutter
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Material splashing out of the inlet during feeding
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Too fast feeding in material or not smooth feeding or blockage happened.
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Control the feeding speed.
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The fracture of the powder is uneven.
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The blade has hole or the gap between the blade and die plate is too big.
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Replace the cutter, adjust the gap
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