Kort ontleding van hulptoerusting van plastiek-ekstruder

The auxiliary equipment of the plastic extrusion unit mainly includes pay-off equipment, reguitmaak toerusting, voorverhitting toerusting, verkoelingstoerusting, traksie toerusting, meter teller,

Vonk toets masjien, opneemtoerusting. Die gebruik van die ekstrudereenheid is anders, en die hulptoerusting wat gebruik word, is ook anders. Soos blokkeer toestel, haardroër, druk toerusting, ens.

Reguitmaak toerusting: One of the most common types of plastic extrusion waste products is migraine, www.flyeimm.com , and the tortuous cores of various types are one of the important causes of insulation migraine. In sheath extrusion, scratches on the sheath surface are often formed by the twists of the cable core. Daarom, the straightening equipment in various extrusion units is essential. The main types of straightening equipment are: drum type (divided into horizontal type and straight type); pulley type (divided into single pulley and pulley block); winch type, which has multiple effects such as dragging, straightening, and stable tension; Pressure wheel type (divided into horizontal type and straight type), ens.
Preheating equipment: preheating of the cable core is necessary for both insulation extrusion and sheath extrusion. Wat die isolasielaag betref, veral die dun laag isolasie, die bestaan ​​van porieë kan nie toegelaat word nie. Die draadkern kan heeltemal van die oppervlak van water en olie verwyder word deur hoë temperatuur voorverhitting voordat dit uitgedruk word. Met betrekking tot skede-ekstrudering, die hoofeffek is om die kabelkern te droog om die moontlikheid van porositeit in die skede te voorkom as gevolg van die effek van vog (of vog rondom die kussinglaag).
Voorverhitting kan ook verhoed dat die plastiek interne druk oorbly as gevolg van skielike afkoeling tydens ekstrusie. In die proses van plastiese ekstrusie, voorverhitting kan die koue draad wat die hoë temperatuur matrys binnegaan uitskakel, (plastiek-ekstruder) die groot temperatuurverskil wat gevorm word wanneer die plastiek by die mond van die matrys aangeraak word, voorkoming van die fluktuasie van die plastiektemperatuur en die ekstrusiedruk. Stable extrusion volume to ensure extrusion quality. Electric heating core preheating equipment is used in the extrusion unit, which needs to have sufficient capacity and ensure rapid heating, so that the core preheating and cable core drying efficiency are high. The preheating temperature is restricted by the pay-off speed, and is usually similar to the head temperature.
Cooling equipment: After the molded plastic extruded layer is separated from the machine head, it should be cooled and shaped immediately, otherwise it will be deformed under the effect of gravity. The cooling method usually uses water cooling, and according to the water temperature, it is divided into rapid cooling and relaxation cooling.
The rapid cooling is direct cooling by cold water. Die vinnige afkoeling is voordelig vir die vorming van die plastiek geëxtrudeerde laag. Maar, vir kristallyne polimere, as gevolg van die skielike hitte afkoeling, dit is maklik om interne spanning in die geëxtrudeerde laagstruktuur te laat, krake tydens gebruik veroorsaak. Die PVC-plastieklaag word geblus. Stadige afkoeling is om die interne spanning van die finale produk te verminder. Water van verskillende temperature word in afdelings in die koelwatertenk geplaas om die finale produk geleidelik af te koel. Die ekstrusie van PE en PP maak gebruik van stadige afkoeling, dit is, deur warm water, warm water, Drie-stadium verkoeling met koue water.
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