The production process of pvc hard board

PVC hard board is made of polyvinyl chloride as the main raw material through a special foaming process. It is one of the typical new chemical building materials products that replace wood with plastic. It is an ideal green and environmentally friendly building decoration material. It is widely used in industries such as vehicle and ship manufacturing, furniture, kitchen and bathroom materials, decoration, etc., and the market demand is large. The production process is also very simple and easy to understand. Here is an introduction to the production process of the board:

1. During production, it is necessary to strictly control the screw speed, extrusion temperature, pressure, etc., and it is also closely related to the structure of the machine head, die, and setting die. Production practice shows that the screw speed is directly related to the extrusion output of the sheet. It is proportional and inversely proportional to the density of the board.

2. The higher the screw speed, the faster the extrusion speed, and the excessive temperature rise of the melt increases the difficulty of process control, but the degree of foaming is uniform and the surface quality of the product is good. On the contrary, when the screw speed is too low and the extrusion speed is slow, it will melt Poor body plasticization reduces production efficiency, while foaming near the die lip makes the surface of the board rough.

3. The quality of pvc hard board is also affected by the residence time of the material in the extruder barrel and die. The residence time is too short, the foaming agent is not decomposed enough, the density of the sheet is too large, the residence time is too long, and it is easy to foam excessively. The mechanical properties are reduced.

4. The screw speed should be determined according to the different process methods of skinning and foaming. It is necessary to comprehensively consider the use requirements of the equipment and the cooling and sawing time of the plate. The screw speed and extrusion speed are set differently according to the thickness of the plate, generally not exceeding 4m/min. .

5. The production process changes with the changes of materials, extruders, and molds. The materials are different, the specifications of the extruder are different from the screw structure, and the specifications and shapes of the extruded profiles are different. The process adjustment methods adopted are very different. The complexity of the extrusion process itself determines the difficulty of achieving skinning foam molding.

PVC hard board is made of polyvinyl chloride as the main raw material. It is a very ideal green and environmentally friendly building decoration material. It can be widely used in vehicle and ship manufacturing, furniture, decoration and decoration industries. The board uses advanced production technology and equipment, and simple production Craftsmanship, made into a sheet that can meet the needs of most people.