Cov tshuab txhaj tshuaj molding kuj tseem hu ua cov tshuab txhaj tshuaj molding lossis tshuab txhaj tshuaj. Nws yog cov khoom siv molding tseem ceeb rau kev ua cov thermoplastics lossis cov thermosets rau hauv cov khoom yas ntawm ntau cov duab siv cov yas molding pwm. Nws muab faib ua ntsug, kab rov tav, thiab txhua hom hluav taws xob. Lub tshuab txhaj tshuaj molding tshuab ua kom sov cov yas thiab siv lub zog siab rau cov yas molten, ua rau nws raug tua tawm thiab sau cov pwm kab noj hniav.
Lub hauv paus ntsiab lus ntawm kev txhaj tshuaj molding tshuab yog zoo ib yam li cov koob txhaj tshuaj uas siv rau kev txhaj tshuaj, uas yog cov txheej txheem ntawm kev txhaj tshuaj yas molten lub xeev (xws li, viscous flow state) rau hauv lub kaw pwm kab noj hniav nrog kev pab los ntawm thrust ntawm cov ntsia hlau. (los yog plunger), thiab tau txais cov khoom tom qab kho thiab shaping.
Kev txhaj tshuaj molding yog cov txheej txheem cyclical, txhua lub voj voog feem ntau suav nrog: kev noj ntau ntau - yaj plasticization - kev txhaj tshuaj siab - pwm filling thiab txias - pwm qhib thiab xaiv. Tom qab tshem tawm ib feem, cov pwm raug kaw dua thiab lub voj voog tom ntej yog nqa tawm.
