AI Intelligence Summary
A plastic crusher shreds plastic and rubber materials like sheets, pipes, and films. It is classified into types such as hard plastic, heavy-duty, and plastic pipe crushers, each tailored for specific materials and output needs. Proper usage involves trial operations, checking chain tension, and adhering to safety protocols. Choosing a crusher depends on performance, reliability, and cost. Regular maintenance, including lubrication, blade checks, and cleaning, is crucial for longevity and efficiency.
— This abstract is generated by AI analysis of the article content and is for reference only.
Plastic Crusher: Usage, Classification, Selection, and Maintenance
A plastic crusher is a specialized machine. When using it, it is necessary to understand some precautions to ensure proper operation. Below is a detailed guide on the usage, classification, selection criteria, and maintenance of plastic crushers.
How to Use a Plastic Crusher
1. Trial Operation of the Plastic Crusher
- Turn on the power grid switch.
- Press the inching button by hand to test-run the machine.
- Start the machine and let it idle for 1–2 cycles.
- Run the transfer conveyor and crusher together.
- Check for abnormalities and issue a start signal if everything is normal.
- During operation, the machinery and motor should run without vibration, abnormal noise, or excessive temperature. Bearings should not exceed 75℃, and the motor temperature must not exceed the rating specified on the nameplate.
- The chain tension of the transfer conveyor must be consistent. Under full load, the chain slack should not exceed the length of two chain links, and there should be no chain jamming or skipping.
- If the fusible plug or bursting disc of the transfer conveyor’s coupling is damaged, do not replace it with wood or other materials.
- The protective net and safety devices of the crusher must remain intact. Inspect them regularly during operation; if damaged, stop the machine immediately for repairs.
- Safety devices such as the tail protection of the transfer conveyor must be kept in good condition.
- Moving the transfer conveyor:
(1) Clear loose coal, gangue, or debris from the tail, both sides of the machine body, and under the bridge.
(2) Protect cables, water pipes, and oil pipes, and hang them neatly.
(3) Inspect the roadway support and move the transfer conveyor only when it is safe.
(4) Ensure the traveling trolley makes good contact with the tail frame of the belt conveyor without deviation. After moving, the overlap should be proper to prevent large plastic pieces from damaging the belt and ensure smooth material flow.
(5) After moving, the head and tail of the conveyor must be level, straight, and stable, and the jack piston rods should be retracted.
2. Operational Precautions
- The plastic crusher and power unit must be installed firmly. For long-term fixed operations, anchor it to a concrete foundation; for mobile operations, mount the unit on an angle iron frame, ensuring the pulley grooves of the power machine (diesel engine or motor) and the crusher are in the same rotating plane.
- After installation, check the tightness of all fasteners. Tighten any loose ones and adjust the belt tension to an appropriate level.
- Before starting, manually rotate the rotor to check if the claws, hammer blades, and rotor rotate flexibly and smoothly. Ensure there is no collision in the crushing chamber, the rotor rotates in the direction indicated by the machine’s arrow, and both the power machine and crusher are well-lubricated.
- Do not replace the pulley arbitrarily, as excessively high speed may cause an explosion in the crushing chamber, while excessively low speed will reduce efficiency.
- After starting the crusher, let it idle for 2–3 minutes. Start feeding only after confirming no abnormalities.
- During operation, monitor the crusher’s performance:
- Feed materials evenly to avoid blocking the crushing chamber.
- Do not overload the machine for extended periods.
- If vibration, unusual noise, excessive bearing or body temperature, or material spraying occurs, stop immediately, inspect, and troubleshoot before resuming work.
Classification of Plastic Crushers
Plastic crushers are designed to shred various plastic and rubber materials, including plastic profiles, pipes, rods, threads, films, and waste rubber products. They are categorized as follows:
1. Hard Plastic Crusher
- Suitable for shredding small to medium-sized plastic sheets.
- Applications: Recycling ABS, PE, PP sheets, etc.
- Features: A uniquely designed rectangular feed inlet for long sheets, improving work efficiency. Optional accessories include a suction fan and storage barrel to form a sheet recycling system for enhanced efficiency.
- Equipped with sealed bearings for long-term smooth operation; reasonable blade design ensures uniform granulation. Blade holders undergo heat shrinkage treatment, with an attractive and durable design.
2. Heavy-Duty Plastic Crusher
- Blade design: A hybrid of claw and flat blades, ideal for shredding regular sheets, pipes, profiles, plates, and packaging materials.
- Universal applicability: Sealed bearings ensure long-term reliability.
- Features: Alloy steel blades, uniform granulation, heat-shrunk blade holders, and strict balance testing for stable operation.
3. Plastic Pipe Crusher
- Suitable for shredding small to medium-sized plastic pipes, such as PE, PVC, and silica core pipes.
- Features: A uniquely designed circular feed inlet for long pipes, boosting efficiency. Optional suction fan and storage barrel form a pipe recycling system.
- Sealed bearings ensure durability; reasonable blade design ensures uniform granulation. Heat-shrunk blade holders enhance structural stability.
- Proven through repeated tests: Motor power is optimally matched to machine performance, ensuring low energy consumption, high efficiency, and long service life across the entire product range.
How to Choose a Good Plastic Crusher
A good plastic crusher is one that meets your production needs. Generally, it should satisfy the following criteria:
1. Performance Meets Production Requirements
The crusher’s performance directly affects production efficiency. A good crusher must deliver the required throughput, granulation quality, and stability to match your operational needs.
2. Reliable Quality
Quality determines maintenance frequency and efficiency. A high-quality crusher is less likely to malfunction, ensuring high productivity and low repair costs. Poor quality leads to frequent breakdowns, low efficiency, and high maintenance expenses.
3. Reasonable Price
For investors, cost-effectiveness is key. A good crusher balances performance and quality with an affordable price, minimizing initial investment while ensuring long-term profitability.
Maintenance and Care of Plastic Crushers
Proper maintenance extends the service life of a plastic crusher. Here’s how to maintain it:
1. Routine Maintenance
- Install the crusher in a well-ventilated area to ensure heat dissipation from the motor, prolonging its life.
- Regularly add lubricating oil to bearings to maintain lubrication.
- Check blade screws periodically. After the first 100 hours of use, tighten the screws of moving and fixed blades to ensure firmness between blades and blade holders.
- Keep blades sharp to avoid unnecessary damage to other components due to dull edges.
- When replacing blades, set the gap between moving and fixed blades: 0.8mm for crushers above 20HP, 0.5mm for those below 20HP. For thinner recycled materials, the gap can be slightly increased.
- Before restarting, clear residual crushed materials in the chamber to reduce startup resistance. Regularly open the inertia cover and pulley cover to clean the ash outlet under the flange, as powder from the crushing chamber may enter the shaft bearings.
- Ensure the machine is well-grounded.
- Check belt tightness regularly and adjust promptly if loose.
2. Operational Maintenance
- Before starting, manually rotate the drive pulley 1–2 turns to confirm smooth movement. Start feeding only after the crusher runs normally.
- Before stopping, stop feeding, empty the machine of materials, then turn off the motor.
- During operation, monitor bearing temperature, ensure proper lubrication, and listen for abnormal sounds or vibrations. If issues arise, stop to check for stuck objects or damaged parts.
- Maintain uniform feeding to avoid overload. Prevent metal, wood, or other non-crushable objects from entering. For dry crushing, avoid excessive moisture; for wet crushing, ensure sufficient water to prevent blockages.
- Check if the crushed material meets the required particle size. If oversized particles are excessive, identify the cause (e.g., excessive screen gap, worn hammers) and adjust accordingly.
- When the crusher is stopped, inspect tightness of bolts and wear on vulnerable parts. For toothed crushers, remove wood stuck between teeth during stops.
- Replace or repair worn parts promptly.
- Keep safety devices functional; never disable them for convenience.
Proper usage, classification awareness, careful selection, and regular maintenance are key to maximizing the efficiency and lifespan of a plastic crusher. Following these guidelines will help ensure safe, productive, and cost-effective operation.
Comments(11)
Finally a straight-to-the-point guide, been hunting for this since last month 👍
@PhantomFang：Dude, same! Found it just as our old unit coughed up smoke
Who else’s brain fried at ‘heat-shrink blade holders’? Felt like I was reading a sci-fi manual lol
So the 75 °C bearing limit—anyone tested that in an Arizona summer? Asking for a sweaty friend
Skipped lunch to read this, now I’m starving and oddly craving plastic flakes
Heavy-duty vs pipe crusher—anyone got a cheat sheet on which one eats milk jugs faster?
Call me weird but the safety warnings gave me ASMR vibes
My boss just emailed this to the whole shop; bets on how many will actually tighten screws after 100 hrs?
Pro tip: print page 3, laminate it, tape it to the machine. Saved me 3 downtime hours already
Plot twist—halfway through I realized our ‘new’ crusher is actually the ancient one described here 😂
Waiting for the sequel: ‘What to do when your crusher starts speaking in binary at 3 a.m.’