Welcome To Shanghai Major Machinery Co.,Ltd.!
Service hotline:
+86 21-61559121
You are here: Home > FAQ > What are the causes of the screw crushing and fracture?How to deal with it?

What are the causes of the screw crushing and fracture?How to deal with it?

Click: 1125Date: 2014-8-29 9:48:37
Q:What are the causes of the screw crushing and fracture?How to deal with it?

A3: There are three reasons will cause this problem:
The process temperature is not reached or heat preservation time is not long enough while booting. In other words, forced booting with cool machine,
There are metal objects in the materials, The screw and screw arris are extruded causing deformation or falling off with metal objects mixed in the materials .
The force of screw rotating torque is increased suddenly and the torque is exceeded the strength limitation of the screw by too fast rotation speed increasing of the host in booting process.

Solutions:
Make strict booting process. Professionals should be designated for operation and temperature verification.
Install a metal detection device and place a strong magnetic support on the feed inlet. The machine should be shut down immediately for overhaul to reduce damage if any metal objects enter into the barrel. Attention should be paid to abnormal noise in screw barrel.
Operate the machine strictly according to the booting process. A low speed running should be keeping in the beginning until the material outflow from the mold, then improve the speed gradually. At the same time, make adjustment on the process parameters till normal production.

Our Company

Facebook Twinter leave word

  • Telephone counseling

  • +86 21-61559121

回到顶部