1. Raw material problem
Reason: the quality of raw materials is poor, such as uneven particle size of wood and plastic, too high moisture content, and improper plastic melting index.
Solution: Strictly control the quality of raw materials, screened dry wood and plastics, and choose plastics suitable for melting index.
2. The temperature is set improperly
Reason: the temperature setting of each section of the extrusion is unreasonable, too high or too low will affect the molding of the particles.
Solution: According to the characteristics of raw materials and process requirements, re-adjust the temperature of each section of the extruder. For example, if the temperature is too low to cause poor particle formation, the temperature can be raised appropriately.
3. Screw speed is not appropriate
Cause: The speed is too fast or too slow, resulting in poor plasticizing and extrusion effect of the material in the cylinder.
Solution: Optimize screw speed and test to find the most suitable speed for current production.
4. Mold problems
Reason: mold structure is unreasonable, such as poor flow channel design, die hole size is not accurate.
Solution: Check the mold, if there is damage or design defects, timely repair or replace the corresponding mold.
5. No stress
Reason: the internal pressure of the extrusion is not enough, and the material cannot be sufficiently compacted.
Solution: Check the tightness of the extrusion to ensure that the pressure can be maintained at a normal level.
The decrease in equipment production may be caused by the following reasons, and the corresponding solutions can be taken as follows:
1.Screw wear
Reason: Long-term use leads to screw wear, affecting the conveying and plasticizing ability of materials.
Solution: Repair the worn screw or replace it with a new screw.
2.Heating system failure
Reason: heating element damage, thermostat failure, etc., so that the material can not reach the ideal plasticizing temperature, thus affecting the output.
Solution: Check and repair or replace the damaged heating element and thermostat to ensure the normal operation of the heating system.
3.Poor feeding
Cause: blocked hopper, failure of feed conveyor or improper feed speed setting.
Solution: Clean the feed hopper, repair the conveyor belt, adjust the feed speed to the appropriate level.
4.Screen clogging
Reason: Excessive impurities filtered by the filter screen hinder the flow of materials.
Solution: Clean or replace the filter regularly.
5.Motor fault
Cause: insufficient motor power, motor aging or failure, resulting in a decrease in speed.
Solution: Check the motor, if there is a problem, repair or replace the motor with enough power.
6.The setting of process parameters is not reasonable
Reasons: such as extrusion speed, screw speed and other parameters set improperly.
Solution: According to the characteristics of equipment and raw materials, re-optimize the process parameters.
Roughness of particle surface may be caused by the following factors, and the corresponding solutions are as follows:
1. Insufficient cooling
Reason: The cooling system is inefficient, and the extruded material cannot be cooled and shaped in time.
Solution: Check the cooling system, such as whether the cooling fan is operating normally, whether the cooling water channel is smooth, etc., and increase the cooling equipment or increase the cooling power if necessary.
2. Extrusion speed is too fast
The reason: the extrusion speed of the material exceeds the ability of cooling and shaping.
Solution: Properly reduce the screw speed of the extruder to slow down the extrusion speed.
3. Uneven mixing of raw materials
Reason: There is an uneven situation in the mixing process of wood flour and plastic.
Solution: Optimize the mixing process, increase the mixing time or improve the mixing equipment to ensure that the raw materials are fully and evenly mixed.
4. Mold wear
Reason: Long-term use leads to mold surface wear, affecting the molding quality of particles.
Solution: Repair or replace the worn mold.
5. Quality of raw materials
Reasons: The grain size of the wood powder in the raw material is large, and the melt index of the plastic is inappropriate.
Solution: Choose the appropriate particle size of wood powder, adjust the melting index of plastic, to ensure that the quality of raw materials meet the production requirements.
Excessive noise may be caused by the following reasons, and the corresponding solutions are as follows:
1. The components are loose
Cause: The connecting parts, such as bolts and nuts, are loose when the device is running.
Solution: Check the connecting parts of the equipment regularly and tighten loose bolts and nuts in time.
2. The transmission component is faulty
Causes: belt wear, chain elongation, gear wear or poor meshing.
Solution: Replace worn belts or chains; Repair or replace worn gears and adjust gear meshing.
3. Bearing damage
Reason: Long-term operation leads to bearing wear, poor lubrication or overload.
Solution: Replace the damaged bearing, and ensure that the bearing has good lubrication, while avoiding overload operation of the equipment.
4. There are foreign bodies in the material
Reason: the feed is mixed with hard foreign bodies, which collide inside the equipment to produce noise.
Solution: strengthen the screening and cleaning of incoming materials and remove foreign bodies.
5. The motor is faulty
Cause: stator and rotor friction of motor, motor bearing failure, etc.
Solution: Repair the motor and repair or replace the faulty parts.
6. Friction between screw and barrel
Cause: screw or barrel wear, the gap between the two becomes larger.
Solution: Repair or replace the worn screw or barrel.
Uneven material mixing may be caused by the following reasons, and the corresponding solutions are as follows:
1. The mixing device is faulty
Cause: The mixing blade is damaged, deformed or fallen off, resulting in poor mixing effect.
Solution: Check the mixing device and repair or replace the damaged mixing blade.
2. Improper mixing speed
Reason: the mixing speed is too fast or too slow to achieve a good mixing effect.
Solution: Adjust the speed of the mixing device to find the best speed for material mixing.
3. Wrong feeding sequence
Reason: The order of feeding different materials is unreasonable, which affects the mixing uniformity.
Solution: Optimize the feeding sequence and determine the correct feeding sequence according to the characteristics and process requirements of the material.
4. Large deviation of material proportion
Reason: The ratio of wood flour and plastic and other materials differs greatly from the set value.
Solution: Strictly control the feed ratio of materials to ensure compliance with the formula requirements.
5. Insufficient mixing time
Reason: the mixing time set by the equipment is too short, and the materials cannot be fully mixed.
Solution: appropriately extend the mixing time of materials.
Equipment overheating may be caused by the following reasons, and the corresponding solutions are as follows:
1. Poor heat dissipation
Cause: The radiator is blocked, the fan is faulty, or the air duct is not smooth.
Solution: Clean the radiator, repair or replace the faulty fan, and ensure that the air duct is unimpeded.
2. Insufficient lubrication
Cause: insufficient lubricating oil or lubricating oil quality decline.
Solution: Add the right amount of high-quality lubricating oil in time and replace the lubricating oil regularly.
3. Run continuously for a long time
Cause: The working time of the equipment is too long, and there is no proper stop heat dissipation.
Solution: Reasonable arrangement of working hours, to avoid long-term continuous operation of equipment, increase intermittent rest time.
4. Overload operation
Cause: The production task exceeds the rated load of the device.
Solution: Adjust the production schedule to ensure that the equipment is operating within the rated load.
5. Parts are worn
Reason: screw, bearing and other key components wear, increase the running resistance, generate too much heat.
Solution: Repair or replace worn parts.
6. Electrical faults
Cause: motor failure, circuit short circuit, etc., resulting in excessive current and excessive heat.
Solution: Check the motor and circuit, troubleshoot, repair or replace damaged electrical components.
