We have also introduced the production process of PVC foam board to you before. As there are more and more applications for this product, we are also producing more and more of it, so we need to do it well. To ensure that its quality can also be used well, we should make preparations first in production.
1. Clean and level the die of the machine head and install it. The opening of the die is generally adjusted to 0.5-2.0mm (depending on the thickness), the opening in the middle is slightly smaller and the opening at both ends is slightly larger;
2. Check whether the water circuit, circuit, gas circuit, etc. are normal, and adjust it;
3. Turn on the power of the host and set the temperature of each section:
(1) Reference setting parameters: Zones one to four of the PVC foam board barrel are: 170°C, 165°C, 160°C, 150°C;
(2) Confluence core: 140℃-145℃ Screw temperature: 70-95℃ The middle temperature of the head is low, the temperature on both sides is high: 165-190℃;
(3) Try not to set the temperature of the machine head too high and exceed the decomposition temperature of PVC, which will cause the material performance to decline. After the temperature reaches the set value, it will be stable for about 30 minutes to 1 hour;
4. Turn on the machine, turn on the feeding machine and a control power supply, adopt hungry feeding and corresponding low-speed extrusion, the feeding speed is 5r/min, and the host speed is 5-6r/min;
5. After the material flows out from the die lip, simultaneously adjust the feeding speed and the host speed to gradually reach the set value. The feeding speed is 26-27r/min. The host speed is 14-15r/min. The host current is about 105A.
For the production of PVC foam board, we must make preparations first. In fact, not only in this aspect, we must also make relevant preparations for any other work, so that we can work smoothly. Therefore, we are prepared during production to ensure the smooth progress of our production.
