Heater heating (external heat): At present, plastic extruder uses electric heating, which is clean, effective and easy to control heating method. That is, an electric heater (with resistance wire inside) is packed on the barrel, and heat is generated by electricity. Due to the combined effect of heat conduction, convection and radiation, the material is heated and melted. Current heaters usually include mica heaters, ceramic heaters, cast aluminum heaters, cast copper heaters, cast iron heaters, etc. There are some differences in the effectiveness of various heaters. Mica heaters have low cost and are easy to process. The service life is short; the power of ceramic heaters and cast iron heaters is large, the temperature rises quickly, it can rise above 300 ° C or higher, the life is relatively short, and it is longer than mica heaters. Cast aluminum heaters and cast copper heaters are the most commonly used due to their high thermal efficiency, good thermal insulation performance and long service life.
Chofaj fwotman chalè (entèn chalè) nan pwosesis la EXTRUSION nan èkstrudeuz plastik: Pandan pwosesis la EXTRUSION, chalè a ki te pwodwi pa deformation nan fòm nan patikil yo plastik akòz presyon nan èkstruzyon fò, ant patikil yo plastik ak ant patikil yo ak la barik ak friksyon akòz friksyon. Pandan pwosesis chofaj la, inèsi monte tanperati a, pa gen pwoblèm ki se metòd chofaj itilize yo sispann chofaj pandan pwosesis chofaj la, paske tanperati a leve, tanperati a ap kontinye monte. Nan tan sa a, ou bezwen gade paramèt yo kontwòl ak presizyon nan enstriman an kontwòl tanperati. Chofaj fwotinè (chalè entèn) nan pwosesis extrusion plastik. Chalè entèn la pwodwi kontinyèlman ogmante tanperati a pwosesis, detwi karakteristik sa yo nan materyèl la, ak lakòz materyèl la yo vin yon pwodwi dechè.