Maintenance and precautions of crusher

I often hear that someone consults how to maintain the crusher when it breaks down. So I decided to write this article help you solve the problems when you use LTPC, LTSWP,LTQL, LTSS Series crusher. The service life of machine will be prolonged if you maintain it termly.

1. Common faults and solutions of crusher

1.1 Common faults

Including LTPC, LTSWP,LTQL, LTSS Series

1. If the speed of belt conveyor is set too quick when crusher is crushing waste plastic, which will cause crusher overload operating. So the waste plastic will accumulate in the crusher’s chamber. In view of this, we should set the reasonable speed of belt conveyor.
   1. The mouth of blower will be blocked when the discharge pipe of blower is blocked. When users meet such situation, please clean the material in conveying pipe and keep it unblocked.
   1. It will influence the crushing efficiency if the blade cracks even drops. And the crusher will not work normally if the screen is blocked by material. In view of this, we should open the crusher to check blades. We should change or adjust the gap between rotary knives and fixed knives. Then we also should clean blockage attached on screen and restart the crusher.
   1. Maybe the crusher will vibrate abnormally. There are many causes. One of the causes is that you feed the big size material into crusher. So the knife shaft will overload and cause vibration. On the other hand, it will also lead to vibrate abnormally if the rotor is unbalanced. But that problem always occurs in new crushers. And that problem is caused during the process of producing. In addition, both the place to park crusher and the stability of foundation also can lead to vibration.
   1. The bearing will heat if the lubricating grease is insufficient, overmuch or impure. If you meet such condition, you should clean the bearing and refuel 50% lubricating grease.
   1. Generally, the size of material after being crushed will get bigger and bigger if the gap between rotary knives and fixed knives gets bigger. At that time, you should adjust the gap between rotary knives and fixed knives 151-22mm.
   1. The belt of crusher will overturn if the belt is abraded. So you should change it.
   1. The capacity of crusher will reduce if the screen is blocked. So you should clean the residuum attached on the screen in time and adjust the speed of belt conveyor.
   1. The main shaft will generate noisy when it works if the main shaft gets loose and the elastic ring is abraded. So you should stop the crusher to tighten the nut and change the elastic ring.
   1. The inside of crusher will generate knock noise if the other material is fed into crusher. In addition, the collision between rotary knives and fixed knives also generates the knock noise.

2. The daily precautions of crusher

• Power on correctly. You should use your hands to push inertia wheel to check if there is other things in crushing room before you start to drive crusher.
  • Start crusher and check the direction of rotation of rotary knives. Please change the direction if the rotary knives rotate inversely. Please lock the feeding room after the crusher operates 3-5 minutes under the condition of without material. And finally feed material to produce if everything is all right.
  • Please do not feed material any more before stopping machine 5 minutes. You should stop the machine when all of surplus material is crushed and discharged.
  • Do not feed metal or other hard material into crusher.
  • You should stop the machine if you listen to any abnormal noise. You should turn off the power and check the cause. Please restart the crusher if everything is all right.
  • The machine should be placed in a ventilated position to ensure to dissipate heat and prolong the service life.
  • Check the knives and screws termly. Please tighten the screws of fixed knives and rotary knives after you use the totally new crushers 1 hour. And reinforce the stability between blades and knife rest.
  • You should fill lubricating oil in bearing termly to ensure the lubricity between bearings.
  • You should check knives termly to ensure their sharpness. This action will reduce the unnecessary damage.
  • Before the second start, you should clean away surplus material in crushing room to reduce the resistance. You should open the inertial cover and pulley cover termly to clean dust under the ring flange.
  • Different crushers should be set different gab between fixed knives and rotary knives. 0.8mm is the best choice for crushers over 20HP, and 0.5mm is the best choice for crushers less 20HP. The thinner waste films are, the bigger gap can be adjusted.
  • You should check belt termly and tighten it i time.
  • The machine should keep good touch with ground.

3. Operation procedure of crusher

3.1 Before operation

• Before starting the machine, the governor should tell all of technical operations to operating personnel after being trained. Then they can operate machine formally.
  • Please check the power supply carefully to prevent electric shock accident.
  • Please check if there is other material in crushing room when you open the crushing room. If so, please clean it away in time.
  • Please close the crushing room and tighten screws when you start crushers.

3.2 Operation procedure and methods

• Please see and hear carefully if there is any abnormal noise after you start the machine.
  • Please feed material when you confirm the crusher running normally.
  • Please feed new material when all of material in crushing room is crushed totally.
  • You must power down and shut down machine timely if blades are blocked. Then you fix it.
  • You must inform governors to arrange maintenance personnel to maintain the machine if the machine breaks down. Do not start the machine if it breaks down and do not maintain it by yourself.
  • Please restart the machine when all of malfunctions are fixed well.

3.3 After operation

• Please shut down the switch and power cut when you finish to crush material.
  • Please clean material attached on crushing chamber and knife rest when you finish to crush material.
  • Please tighten all of screws when you close the crushing chamber.
  • Please put material crushed into woven bags or buckets according to different material and place them in designated place.
  • Operating personnel must clean the machine and make sure the power cut when they get off work.
  • Operating personnel should tell the operating condition to the next shift if the machine works continuously

3.4 Safe operation

• Do not feed too much material into crusher once time to prevent from being locked and burning the motor.
  • Do not put your hands into crusher when it is working.
  • Do not feed hard material into crusher.
  • D not place other things on crusher such as kettle, scissor, blade to prevent them falling into crusher and damage the crusher.
  • Please power cut when you maintain the crusher or change blades. And you should post a conspicuous sign wrote “Machine maintenance, please do not close”.

Regarding LTPC, LTSWP,LTQL, LTSS Series different and which kind of materials are most suitable, I am glad to have a deep talk with you, if you need the operation guide video, just give me an email: info@lantaimachinery.com