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Several aspects of knowledge that need to be paid attention to in the production of PVC sheets

2019-07-10 11:40:47


PVC sheet is a kind of material, and it is also a kind of material that is often used. Its use is also very convenient. It can provide us with convenience and also bring a lot of good decorative effects. Therefore, the manufacturer of PVC sheet At that time, some aspects of knowledge must be paid attention to, especially the quality aspects should be paid more attention to. Come and listen to how Zhongsheng New Materials introduces you. You can take a look.

1. The surface is rough and dull. The three-roller working surface is rough or sticky. The working surface of the three-roller should be cleaned and polished to make the surface smooth. The roller temperature of the calender is low, so the temperature of the three rollers should be increased appropriately. The surface of the die lip is not smooth, so the die lip should be cleaned. The filter screen is broken and should be replaced with a new one.

2. There are horizontal lines on the surface of the PVC sheet. The uneven mixing of materials causes fluctuations in the extrusion volume. It should be replaced with mixed homogeneous materials, and the process parameters of the extruder should be adjusted to make the material plasticize well and the extrusion volume uniform. The barrel temperature fluctuates greatly. The barrel temperature control system should be checked and adjusted to ensure the accuracy of temperature control.

3. The longitudinal thickness deviation of PVC sheet is large. The temperature control of the barrel is unstable, which makes the melt flow rate unstable. The temperature of the barrel should be adjusted to stabilize it. The screw speed is unstable, resulting in unstable extrusion volume. The process parameters of the extruder should be adjusted to make the extrusion stable. The rotation speed of the rollers in the three-roll calender is unstable, and the rotation speed of the three-roll calender should be adjusted.

4. The lateral thickness is uneven. The design of the molding die is unreasonable and the cross-sectional fabric flow is uneven. The die should be modified to make the die output uniform. The lip gap adjustment is unreasonable and the gap is uneven. The gap in the middle should be slightly smaller than the gap on both sides. The three-roller gap deviation of the three-roller calender is relatively large, and the gap between the three rolls should be made uniform.

I hope everyone can pay attention to these aspects, especially PVC sheet manufacturers. Only when they produce high-quality products can they be favored by consumers and make your product sales higher. If there are other product needs, you can see the product center will have the one that suits you.

PVC sheet


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