Rigid PVC foam board is made of PVC as the main material, through a special foaming process. Due to its internal structure of fine bubble holes and surface similar to natural wood, it is a very ideal building decoration material and can be widely used in industries such as car and boat manufacturing, furniture, kitchen and bathroom material decoration and so on, with a large market demand.

The extrusion process of PVC foam board is roughly as follows:

The powdered material enters the extruder from the hopper, with the continuous forward movement and the temperature change in the extrusion process, the material slowly changes from solid to viscous flow state, and the foaming agent decomposes. Due to the high pressure in the extruder and mould, the gas released from the decomposition of the foaming agent dissolves into the PVC melt under high pressure. After PVC melt is extruded from the mould, the gas dissolved in the melt expands and foams rapidly due to the sudden loss of pressure of the melt. It immediately enters the calibration units for cooling and calibrating and then enters the water tank for further cooling. Finally, the product is cut into a certain length after passing through the hauler.

Generally, the processing varies with the material, extruder and mould, and the process adopted can vary considerably depending on the specification and shape of the extruded profile. The complexity of the rigid PVC extrusion process itself determines the difficulties of foam forming. The quality of the PVC foam sheet is directly related to the screw speed, the extrusion pressure, the bush and the structure of the cooling and setting mould. It is therefore necessary to have advanced production line equipment and a suitable foaming process.

If you’re interested in PVC form sheet extrusion line and need different types plastic production line in your manufacturing, Wonplus is a professional manufacturer of plastic machinery and equipment in China. We have various plastic extrusion lines applying many plastic technologies, which has high output, stable quality and good service, which are sold all over the world and well received by customers.