Views: 0 Author: Site Editor Publish Time: 2022-10-19 Origin: Site
The PPR HDPE pipe extrusion machine is pushed into the mold with constant pressure, constant temperature and constant power head speed, and the product is formed into a molten state through the mold. During the extrusion process of the FEP material, the plastic is conveyed, compacted and further melted by the screws of the PPR HDPE pipe extrusion machine, so that the FEP material is in a completely uniform plasticized state, extruded from the die under pressure, mechanically formed, cooled to make into the desired product.
What are the three stages of PPR HDPE pipe extrusion machine?
How to deal with the thickness problem of PPR HDPE pipe extrusion machine?
What are the precautions for using PPR HDPE pipe extrusion machine?
1. Raw material plasticization, that is, through the heating and mixing of PPR HDPE pipe extrusion machine, the solid raw material becomes a uniform viscous fluid;
2. Forming, that is, under the action of the extrusion parts of the PPR HDPE pipe extrusion machine, the molten material is continuously passed through the forming head at a certain pressure and speed, so as to obtain a certain cross-sectional shape;
3. Cooling and setting, that is, by sizing and cooling, the molten material will be fixed in the obtained shape and turned into a solid state (plastic pipe).
There are many reasons for the thinning of the inner rubber, such as the expansion caused by inflation during the inner rubber tube sleeve; the influence on the inner rubber extrusion and stretching during the process of weaving and winding; the PPR HDPE pipe extrusion machine is extruded. For the inner rubber tube, the rubber layer is thinned due to insufficient cooling and shaping time or mutual adhesion. In order to compensate for the thinning of the wall thickness caused by the process, the thickness of the extruded adhesive layer is generally increased appropriately than the thickness of the structural design.
The compensation thickness of the inner rubber should be determined according to the properties of the rubber and the process requirements. For example, when the plasticity of the rubber and the tension of the weaving spindle are large, the compensation thickness should be larger; the PPR HDPE pipe extrusion machine is suitable for products with higher requirements. , the compensation thickness also needs to change with different seasons. Generally, the compensation thickness in summer is appropriately increased than that in winter.
In the actual operation of PPR HDPE pipe extrusion machine, the plasticity of the rubber compound should be strictly controlled, and the extrusion temperature should be coordinated with the traction speed to avoid the phenomenon of uneven thickness of the extrusion pipe. There should be no impurities in the rubber compound and self-sulfur phenomenon should be avoided to ensure the smoothness of the rubber layer. The moisture and volatile matter in the rubber compound should not be too much, and the extrusion temperature should not be too high, otherwise it will cause foaming or sponge phenomenon in the rubber layer. The pipes extruded by the PPR HDPE pipe extrusion machine should be fully cooled, and the release agent should be properly sprayed to avoid sticking of the pipes.
If you want to order a PPR HDPE pipe extrusion machine, you must choose Zhangjiagang YaTong Machinery Co., Ltd., because they can provide the most high-quality and cheap PPR HDPE pipe extrusion machine.