1、 Equipment maintenance and safety protection

1. Regular maintenance of core components
   • Screw and barrelDisassemble and inspect every 2500-500 hours of operation, replace worn parts such as screw threads and inner walls of the barrel, to avoid material backflow or jamming due to excessive clearance.
   • gearboxUse designated lubricating oil and replace it every 4000 hours; The oil level should be kept within the oil gauge line to prevent gear damage caused by overheating or lubrication failure.
   • cooling systemRegularly clean the scale in the cooling water pipeline to prevent corrosion and leakage; The vacuum shaping box needs to check the sealing of the vacuum pump to avoid insufficient pressure affecting the accuracy of the product.
2. Electrical system safety
   • Motor maintenanceCheck the wear of the carbon brush of the DC motor every month and replace it if necessary; The insulation resistance needs to be measured regularly to ensure ≥ 1M Ω.
   • Electrical Control CabinetSweep dust every month to prevent short circuits; The wiring terminals need to be tightened to avoid sparks caused by poor contact.
   • Emergency stop deviceEnsure that emergency stop buttons, safety door locks, and other devices are sensitive and reliable, and operators need to be familiar with their locations and usage methods.

2、 Personnel operation safety regulations

1. Personal protective equipment
   • Basic protectionOperators must wear safety helmets, protective goggles, dust masks, anti cutting gloves, and anti smashing safety shoes.
   • high-temperature protectionWhen in contact with the heating section (such as the barrel and mold head), it is necessary to wear insulated gloves to prevent burns.
   • Noise protectionWear earplugs or earmuffs in environments with noise levels ≥ 85dB to reduce the risk of hearing loss.
2. Standardization of operating procedures
   • Pre startup inspectionConfirm that there are no debris around the equipment and that safety protection devices are in place; Check if the screw direction is correct to avoid equipment damage caused by reverse rotation.
   • Monitoring during operationPay close attention to parameters such as temperature, pressure, and current, and immediately shut down for troubleshooting if any abnormalities are found (such as temperature exceeding the standard or pressure fluctuations).
   • Shutdown maintenanceHang a "Do Not Close" sign after turning off the power; Special tools should be used when cleaning screw debris, and direct contact with high-temperature components by hand is prohibited.

3、 Process parameter control and risk prevention

1. temperature management
   • barrel temperatureThe temperature in the feeding section should be higher than that in the homogenization section to prevent material blockage; The temperature of the mold head should be strictly set according to the process requirements to avoid material decomposition (producing toxic gases) caused by high temperature or poor plasticization caused by low temperature.
   • Cooling water temperatureThe water temperature of the vacuum shaping box should be controlled at 6-8 ℃, and the water temperature of the water-cooled shaping tank should be ≤ 15 ℃ to prevent product deformation or surface roughness.
2. Pressure and speed matching
   • traction speedNeed to be slightly faster than the extrusion speed (usually 5% -10% faster) to avoid the product being pulled apart or stacked; The tension of the traction machine should be uniform to prevent product eccentricity.
   • vacuum degree controlWhen vacuum forming, the vacuum degree should be maintained at 0.06-0.08MPa. If it is too high, it will increase the traction resistance, and if it is too low, it will cause dimensional deviation of the product.
3. Material Management
   • Raw material pretreatmentWood powder needs to be dried to a moisture content of ≤ 1% to prevent the formation of bubbles during extrusion; The mixture needs to pass through an 80 mesh sieve to remove large particle impurities.
   • Anti blocking measuresThe hopper needs to be equipped with a vibrating screen or a forced feeding device to prevent wooden fiber bridging; Regularly clean the mold head flow channel to avoid carbonization and blockage of residual materials.

4、 Environmental and Emergency Management

1. Production environment requirements
   • cleanlinessThe workshop needs to be kept dust-free to prevent impurities from mixing into the materials; The ground should be slip resistant to prevent personnel from slipping.
   • improve air circulationExhaust devices should be installed in the heating section area to promptly discharge volatile organic compounds (VOCs) and prevent personnel poisoning.
   • fire preventionNo open flames are allowed in the workshop, and fire extinguishers and hydrants are equipped; Electrical circuits need to be regularly inspected to prevent short circuits from causing fires.
2. Emergency Response Plan
   • Fire handlingImmediately cut off the power and use a dry powder fire extinguisher to extinguish the fire; If the fire is large, emergency evacuation procedures need to be activated.
   • personnel injuryMinor burns or cuts should be washed with clean water and then bandaged; Serious injuries require immediate medical attention and protection of the scene for subsequent investigation.
   • Equipment failureHang warning signs after shutdown and prohibit non professionals from repairing; Power off and relieve pressure before troubleshooting.