1. cawv ntawmmouldingcov txheej txheem ua rau shrinkage ntawm cov khoom yas
(1) nrog rau qhov kub thiab txias tsis hloov pauv, lub siab txhaj tshuaj nce thiab qhov shrinkage poob;
(2) Lub shrinkage txo nrog qhov nce siab;
(3) Lub shrinkage poob nrog qhov nce ntawm yaj kub.
(4) Cov shrinkage nce nrog qhov siab tuag siab;
(5) Qhov shrinkage poob qis thaum lub sijhawm tuav ntev, tab sis tus nqi shrinkage tsis cuam tshuam tom qab lub rooj vag kaw;
(6) Lub sijhawm txias hauv lub pwm yog qhov ntev, thiab lub ntsej muag ntsws poob qis dua;
(7) Qhov kev txhaj tshuaj yog qhov siab, thiab qhov txo qhov shrinkage nce siab me ntsis, uas tsis tshua muaj kev cuam tshuam;
(8) Tus ua shrinkage yog loj thiab lub post shrinkage yog me me. Cov kev xa tom qab yog qhov loj nyob hauv thawj ob hnub thiab nyob ruaj khov hauv ib lub lis piam lossis li ntawd. Moulding shrinkage ntawm txhaj tshuaj plunger yog qhov loj.
2. Cuam tshuam los ntawm cov qauv yas ntawm kev shrinkage ntawm cov khoom
(1) lub shrinkage tus nqi ntawm tuab-walled yas qhov chaw yog loj dua li ntawm nyias-walled yas qhov chaw (tab sis lub shrinkage tus nqi ntawm feem ntau 1mm nyias-walled yas qhov chaw yog loj dua 2mm es tsis txhob, uas yog vim qhov nce ntawm yaj tsis kam hauv cov pwm kab noj hniav);
(2) Lub shrinkage ntawm cov yas nrog cov kab ntawv yog qhov me dua uas tsis muaj ntxig.
(3) Lub ntsej muag ntsws ntawm cov ntu yas nrog cov khoom seem me me dua li uas muaj cov duab yooj yim;
(4) Lub shrinkage ntawm cov yas nyob rau hauv qhov siab qhov taw qhia feem ntau me dua li hauv kab rov tav.
(5) Lub shrinkage ntawm slender yas seem nyob rau hauv ntev qhov ntev yog me;
(6) Lub shrinkage ntawm cov yas nyob rau hauv qhov ntev taw qhia yog qhov me dua uas nyob rau hauv cov tuab kev taw qhia.
(7) Lub shrinkage ntawm sab hauv yog loj thiab lub shrinkage ntawm cov qauv sab nraud yog me me.
3. Cov cawv ntawm pwm txheej txheem ntawm lub shrinkage ntawm cov khoom yas
(1) lub qhov rooj loj yog qhov loj thiab qhov shrinkage txo;
(2) Txo tsawg zuj zus nyob rau hauv feem ntsug rooj vag kev taw qhia thiab nce nyob rau hauv thaum uas tig mus rooj vag kev taw qhia;
(3) Lub shrinkage deb ntawm lub rooj vag yog me dua uas nyob ze ntawm lub rooj vag;
(4) Lub shrinkage tus nqi ntawm cov yas nrog mould txwv yog qhov me me, thaum ntawm qhov chaw yas yam tsis muaj kev txwv yog loj.
4. Cuam tshuam ntawm cov khoom ntiag tug ntawm yas rau kev ua kom cov khoom tsawg tsawg
(1) tus nqi tsawg dua ntawm crystalline yas yog qhov siab tshaj qhov ntawm amorphous yas;
(2) Yas nrog fluidity zoo muaj me me molding shrinkage;
(3) Thaum muab tub lim ntxiv rau plastics, moulding shrinkage pom tseeb.
(4) Cov pas dej sib txawv ntawm cov yas ib leeg muaj cov sib txawv molding shrinkage
