The method of solving the problem of poor plasticization of PVC edge banding by Liyouli
1. Poor plasticization of PVC edge banding
(1) There is a toad skin like phenomenon on the surface of the plastic layer.
(2) The temperature control is low, the instrument pointer reflects a low temperature, and the actual measured temperature is also low.
(3) The surface of the plastic is blackened and has small cracks or poorly plasticized particles.
(4) The plastic glue is not sewn well, with a clear mark.
2 Reasons for poor plasticization of PVC edge banding strips
(1) The temperature control is too low or inappropriate.
(2) There are resin particles in plastics that are difficult to plasticize.
(3) Improper operation method, screw and traction speed are too fast, and the plastic has not fully plasticized.
(4) Uneven mixing of plastic during granulation or quality issues with the plastic itself.
3. Methods for eliminating poor plasticization of PVC edge banding strips
(1) Control the temperature according to the process regulations, and if the temperature is low, adjust it appropriately.
(2) It is necessary to appropriately reduce the speed of the screw and traction to increase the heating and plasticizing time of the plastic, in order to improve the plasticizing effect of the plastic.
(3) Using screw cooling water to enhance the plasticization and compactness of plastics.
(4) When selecting molds, the mold sleeve should be slightly smaller to increase the pressure at the glue outlet.