Taw qhia rau Moulding txheej txheem ntawm cov raj mis haus

Hauv lub neej niaj hnub, lub raj mis dej haus tau siv dav, feem ntau yog siv los tuav ntau yam dej haus. Cov txheej txheem molding ntawm lub raj mis haus yog siv hluavtaws cob polymers los ua ntau yam khoom yas. Raws li qhov sib txawv ntawm kev siv, lub raj mis dej haus kuj yuav txawv ntawm qhov tsos, xim, thiab cov khoom siv. Feem ntau, muaj rau cov txheej txheem tseem ceeb hauv cov txheej txheem molding ntawm lub raj mis: compression molding (compression molding) - extrusion molding (extrusion molding) - txhaj tshuaj molding (injection molding) - tshuab moulding (hollow molding) - calendering - foam molding Etc., rau txhua txoj kev sib txawv, cov txheej txheem ntau lawm kuj yuav txawv.

1. Compression molding: tseem hu ua compression molding lossis compression molding, compression molding yog tsuas yog siv rau molding ntawm thermosetting plastics xws li phenolic resin, urea-formaldehyde resin, thiab unsaturated polyester resin.

2. Extrusion: Kuj hu ua extrusion molding, nws yog ib txoj kev siv extruder (extruder) kom tsis tu ncua hla cov rhuab resin los ntawm pwm rau extrude cov khoom ntawm cov khoom xav tau. Extrusion kuj qee zaum siv hauv molding ntawm thermosets thiab tuaj yeem siv rau hauv molding ntawm foamed plastics. Qhov kom zoo dua ntawm extrusion yog tias nws tuaj yeem extrude cov khoom ntawm ntau yam duab, nrog kev ua haujlwm siab, thiab tuaj yeem ua haujlwm thiab ua haujlwm tas mus li; Qhov tsis zoo yog tias thermosetting plastics tsis tuaj yeem ua tiav los ntawm txoj kev no, thiab cov khoom loj yog qhov sib txawv.

3, txhaj tshuaj molding: tseem hu ua txhaj tshuaj molding. Kev txhaj tshuaj molding yog ib txoj hauv kev siv lub tshuab txhaj tshuaj molding (los yog lub tshuab txhaj tshuaj) los txhaj cov thermoplastic yaj rau hauv pwm nyob rau hauv siab, txias thiab solidifying kom tau ib yam khoom. Txhaj tshuaj molding kuj tseem siv tau rau molding ntawm thermosets thiab foams. Qhov zoo ntawm kev txhaj tshuaj molding yog tias qhov kev lag luam nrawm nrawm, kev ua haujlwm siab, kev ua haujlwm tuaj yeem ua haujlwm tau, thiab nws tuaj yeem tsim qhov chaw nrog cov duab nyuaj, uas yog tshwj xeeb tshaj yog tsim rau ntau lawm. Qhov tsis zoo yog tias cov khoom siv thiab pwm cov nqi siab, thiab lub tshuab txhaj tshuaj molding yog qhov nyuaj los ntxuav.

4. Tshuab moulding: tseem hu ua hollow tshuab moulding lossis hollow molding. Tshuab moulding yog ib txoj kev ntawm inflating ib tug kub resin parison kaw nyob rau hauv lub pwm rau hauv ib tug hollow khoom los ntawm txoj kev ntawm lub siab ntawm compressed cua. Tshuab moulding muaj xws li ob txoj kev tshuab tshuab thiab tshuab hollow khoom. Tshuab moulding tuaj yeem siv los tsim cov khoom ua yeeb yaj kiab, ntau lub raj mis, cov thoob, lub lauj kaub ntim thiab cov khoom ua si menyuam yaus.

5. Calendering: Nws yog ua cov resin thiab ntau yam additives rau hauv ib zaj duab xis los yog daim ntawv los ntawm qhov sib txawv ntawm ob los yog ntau tshaj calender rolls nrog opposite lus qhia tom qab kev kho mob (kneading, pom, thiab lwm yam), thiab ces los ntawm lub calender yob. Ib txoj kev molding nyob rau hauv uas sab saum toj yog tev tawm, thiab ces txias thiab zoo li tus. Calendering yog txoj kev molding feem ntau yog siv rau polyvinyl chloride resin, uas tuaj yeem tsim cov yeeb yaj kiab, nplooj ntawv, cov laug cam, tawv tawv, cov vuas hauv pem teb thiab lwm yam khoom.

6. Foaming molding: Cov txheej txheem ntawm kev ua cov yas muaj cov qauv microcellular los ntawm kev ntxiv cov khoom tsim nyog foaming rau cov ntaub ntawv sib txawv (PVC, PE thiab PS, thiab lwm yam). Yuav luag tag nrho cov thermosets thiab cov thermoplastics tuaj yeem ua npuas dej. Raws li cov qauv ntawm tes, nws tau muab faib ua qhov qhib-hlwb ua npuas ncauj (feem ntau ntawm lub qhov hws yog txuas nrog ib leeg) thiab kaw-cell ua npuas ncauj (feem ntau ntawm qhov pores yog sib cais). thiab mechanical foaming).