Shantou Hetian Machinery Manufacture Co.,Ltd

In the field of plastic recycling and processing, plastic crushers are indispensable key equipment, and their performance and operating standards directly affect production efficiency and safety. Whether it is the recycling of waste plastics or the recycling of scraps in plastic product production, plastic crushers play an important role. Below is a systematic summary of the core knowledge points of plastic crushers, including principles, types, operations, and maintenance.

Working principle: The synergistic effect of shearing, impact, and compression

The plastic crusher converts large pieces of plastic into particles that meet the requirements for subsequent processing through the triple action of shearing, impact, and extrusion. When the equipment is running, the high-speed rotating moving blade and the fixed fixed blade form a shear force, like sharp scissors cutting plastic; At the same time, the material is constantly impacted by the blades in the crushing chamber, as well as colliding and squeezing with the chamber wall, gradually breaking into small particles. As a key component, the sieve strictly controls the particle size of the discharged material to ensure uniform particle size after crushing, meeting the requirements of processes such as granulation and injection molding.

Equipment type: Suitable for different materials and production needs

• Rough crusher: With wide blades and low rotation speed, it is suitable for crushing large plastic objects such as plastic buckets, plastic trays, etc. The particle size of the discharged material is usually between 10-50mm, and it is commonly used in the primary stage of recycling and processing;

• Intermediate crusher: The blade size is moderate, and the crushing force is between coarse and fine crushing. It can further process the coarse crushed material, with a discharge particle size of about 3-10mm, serving as a transitional connection;

• Fine crusher: equipped with dense blades and extremely high speed, capable of finely crushing materials to 1-3mm, it is a key pre-treatment equipment before plastic granulation;

• Grinding disc crusher: relying on the grinding effect between grinding discs, plastic is ground into powder form, suitable for processes with special requirements for material form, such as plastic powder coating production.

Safe operation: strictly adhere to regulations and eliminate hidden dangers

• Pre start inspection: It is necessary to confirm that the blades are not loose or worn, and the screen mesh is not damaged; Check if the protective device is intact, conduct a no-load test run for 3-5 minutes, and observe if the equipment runs smoothly;

• Feeding standards: It is strictly prohibited to throw hard objects such as metal and stones to prevent damage to the blades and screen mesh; Adhere to the principle of "small amount multiple times, uniform feeding" to avoid motor burnout or equipment jamming caused by overload operation;

• Personnel protection: Operators need to wear protective equipment such as goggles, earplugs, gloves, etc., and tie and fix their long hair; During the operation of the equipment, it is strictly prohibited to open the protective cover to avoid mechanical injury;

• Emergency response: Once abnormal noise, severe vibration, or odor is detected, immediately press the emergency stop button, cut off the power, and wait for the equipment to completely stop before troubleshooting.

Maintenance: Extend lifespan and ensure efficient operation

• Blade maintenance: Regularly check the wear of the blade, and promptly sharpen or replace it when there are obvious gaps or passivation on the blade edge; Maintain a reasonable gap of 0.5-1mm between the moving blade and the fixed blade to ensure the cutting effect;

• Lubrication management: Regularly add high-temperature resistant and wear-resistant lubricating grease to key parts such as bearings and transmission components to prevent component damage caused by friction overheating;

• Screen replacement: If the aperture of the screen is found to be deformed or damaged, replace it with a new screen in a timely manner to avoid the discharge particle size not meeting the requirements;

• Electrical maintenance: Check the insulation performance of the motor every month, clean the dust and debris inside the control box, and prevent faults caused by electrical short circuits.