PVC hose uses suspension polyvinyl chloride as the main raw material, adding a certain proportion of plasticizers, stabilizers, lubricants and other auxiliary materials. After mixing evenly, it is granulated and then made into products using an extruder.
PVC hoses can have different characteristics due to different raw material formulas. Due to the addition of plasticizer, this PVC hose is very soft and can be bent at will, which is different from PVC hard pipes.
PVC hoses mainly replace rubber pipes to transport various liquids, and can also be used as cable casings and insulating sheathing pipes for wires.
The production process of PVC hose production line: proportional measurement-mixer stirring-mixing and granulation-extruder-mold-shaping cooling-traction-winding-inspection-packaging and storage.
Formula: The main raw materials are suspension method PVC SG2, SG3 and SG4. According to different ratios, transparent oil pipes, insulated pipes, acid and alkali resistant pipes, heat resistant pipes, cold resistant pipes, etc. can be produced.
The selection of PVC hose equipment is also different from the general PVC hard pipe extrusion. The extruder generally uses a single screw. The screw structure is equidistant and unequal depth. The length-to-diameter ratio is in the range of 18-25, and the compression ratio is between 2.5-3.5. between. The selection of granulation equipment in the previous process will not be introduced here. If anyone needs this type of equipment, please contact us.
The mold split cone is 60 degrees, the compression ratio is 5-10, the length of the straight part of the mandrel is about 15 times the wall thickness, the inner diameter of the die and the outer diameter of the mandrel should be 15% larger than the outer diameter and inner diameter of the pipe.
There are some points to pay attention to when mixing and kneading during granulation. I won’t introduce them here. Let’s just talk about the temperature during extrusion molding. The feeding section is 80-110°C, the plasticizing section is 120-145°C, and the homogenizing section 150-170℃, molding mold temperature 170-190℃.
