Sheet machine need to be aware of requirements at 10

by:Mengxing     2020-06-07
1. Sheet machine need to pay attention to three roll working temperature, usually into the roller to have a slightly higher temperature, the piece of roller temperature is lower. 2. Roller surface to some highly; Between three roller should be equal to or greater than the plate thickness. 3. Pay attention to the three roller working surface roughness should not be less than zero. 2 PM cannot use hard knife scratching axial surface, because of the use of scrap copper knife clean roll surface. 4. Die lip clearance should be slightly less than or equal to the thickness of plate quality product, die lip middle gap needs to be less than end lip clearance on both sides. 5. Sheet machine into the form, the intermediate roll surface under lip plane in a horizontal plane, lip face and intermediate roll axis parallel, 5 to 10 centimeters apart. 6. Molding temperature slightly higher than the barrel temperature, higher temperature in between 5 to 10 degrees. 7. Sheet machine production equipment machine barrel each temperature by charging stage began to grow high and molding junction temperature. 8. Except for polyvinyl chloride (PVC), polyethylene and polypropylene resin extrusion generally not dehumidification process, before some other plastic should be required before extrusion moisture in dry processing. 9. Three roll plate embryo from mold mouth is slightly higher than the running speed of extrusion speed, speed difference usually not more than ten percent. 10. Sheet machine injection mold temperature control need stability, instability will cause the great error in the longitudinal plate products.
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