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2024-03-21
The surface of the board has horizontal lines
① Uneven mixing of materials causes fluctuations in extrusion volume. It is necessary to switch to uniformly mixed materials and adjust the process parameters of the extruder to ensure good plasticization of the materials and even extrusion volume.① The extrusion temperature is too low, resulting in poor plasticization of the melt. The body and nose temperature should be appropriately increased The gap between the mold lips is too small. It should be appropriately increased.
②The opening of the mold lip is generally equal to or slightly smaller than the thickness of the sheet, which is expanded after extrusion and stretched to the required thickness.
③ The traction speed is too fast. It should be slowed down appropriately. The traction speed should be slightly faster than the extrusion speed.
Warping unevenness
① Improper control of roller temperature in the calender, especially when the temperature of the middle and lower rollers is too low. The roller temperature should be controlled within an appropriate range.
Surface black or discolored stripes and spots
① The temperature of the machine head is too high, causing the material to overheat and decompose. The head temperature should be appropriately reduced.
②There are dead corners inside the nose of the machine, causing the decomposition of stagnant materials. The machine head should be cleaned to eliminate dead corners.
③ There are impurities blocking the nose of the machine, causing stagnationShare to:
Send Inquiry
Ms. Cherry Chen
Tel:86-0371-65582722
Fax:86-0371-65582873
Mobile Phone:+8618539282682
Email:cherrychen@shunbangchem.com
Address:No.85 Huayuan Road,Jinshui District, Zhengzhou City, Henan Province,China, Zhengzhou, Henan
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.