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The PVC profiles produced by Plastic Board Production Line are often distorted. What is the solution?

2019-01-29 14:46:15

           The PVC profiles produced by Plastic Board Production Line are often distorted. What is the solution?Bending deformation of PVC profile plastic products is a common problem in the extrusion process, the main reasons are: uneven die discharge, cooling stereotypes, material cooling is not sufficient, after the shrinkage is inconsistent, equipment and other factors.

           It can be solved from the following aspects:

  1. Ensure the concentricity and flatness of plastic board production line. Correct the concentricity and levelness of extruder, die, mold and water tank when changing the mold.
  2. Before using plastic board production line, please assemble the mold carefully so that all parts have the same gap.. If uneven discharge is found when starting the machine, the die temperature can be adjusted correspondingly according to the bending direction of the blank to ensure uniform discharge.
  3. Adjust the cooling system of the mold, and increase the cooling water amount on the side of the profile bearing tensile stress.
  4. Adopt the method of mechanical migration center adjustment, that is, adjust the positioning bolt in the middle of the mold while producing, and make reverse micro-adjustment according to the bending direction of the profile. When using this method, it should be noted that the adjustment amount is not suitable for too large.
  5. Pay close attention to the working quality of molds, pay attention to the maintenance of molds, and maintain molds at any time according to the actual situation.Reduce PVC profile plastic products appear bending deformation problem.

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