Dab tsi yog qhov sib txawv ntawm qhov sib txuas, ua pa thiab co-kev txhaj tshuaj compression molding?

txhaj tshuaj compression moulding / icm yog ib daim ntawv siab heev ntawm kev txhaj tshuaj molding. Nws nce qhov ntev txaus / phab ntsa thickness piv ntawm kev txhaj tshuaj molded qhov chaw; siv tsawg clamping quab yuam thiab txhaj tshuaj; txo cov khoom siv hauv tsev; thiab nce kev tsim khoom.

Kev txhaj tshuaj molding yog tsim rau ntau yam khoom ua los ntawm cov khoom siv thermoplastic engineering, xws li cov khoom nkhaus loj, nyias-walled, cov khoom me me, qhov muag qhov muag, thiab qhov chaw uas xav tau kev tiv thaiv zoo rau cov yam ntxwv.

Lub ntsiab feature ntawm kev txhaj tshuaj compression molding yog qhov chaw pwm kab noj hniav tuaj yeem hloov kho rau cov kev xav tau sib txawv piv rau cov txheej txheem txhaj tshuaj molding.

    For example, it is possible to close the mold guides before the material is injected into the cavity, while the cavity space is expanded to twice the finished wall thickness of the part. In addition, the size of the cavity space can be controlled during or after the material is injected, depending on the operation, to match the injection process, to keep the polymer under proper pressure, and to compensate for material shrinkage.

Nyob ntawm seb qhov geometry ntawm qhov txhaj tshuaj, qhov yuav tsum tau ua kom zoo, thiab cov cuab yeej txhaj tshuaj sib txawv, muaj plaub qhov kev tiv thaiv shrinkage tiv thaiv los ntawm kev xaiv. Lawv yog: sequential; coactive, ua tsis taus pa thiab ib nrab siab.

Sequential icm (seq-icm)

Cov txheej txheem txhaj tshuaj compression molding txheej txheem nyob rau hauv uas kev txhaj tshuaj ua haujlwm thiab kev thawb ua ke ntawm cov pwm kab noj hniav yog ua tiav. Thaum pib, daim ntawv qhia pwm yog me ntsis kaw thiab muaj qhov chaw kab noj hniav ntawm ob zaug ntawm phab ntsa thickness ntawm ib feem. Thaum cov resin txhaj rau hauv pwm kab noj hniav, qhov txav ntawm cov pwm raug thawb kom txog thaum nws raug kaw tag thiab cov polymer yog compressed hauv kab noj hniav.

Thaum lub sij hawm tus txheej txheem no, muaj ib tug ncua nyob rau hauv polymer txaus thiab ib lub sij hawm ntawm so ntawm lub tiav ntawm kev txhaj tshuaj thiab pib compression, uas tej zaum yuav tsim ib tug ndlwg kab nyob rau saum npoo ntawm ib feem, nyob ntawm seb cov xim ntawm cov khoom polymer, raws li zoo raws li ib tug ndlwg kab nyob rau saum npoo ntawm cov khoom. zoo li cov qauv kev ntxhib los mos thiab cov khoom siv ntawm qhov uas tau molded. Cov txheej txheem yog ua raws li qhov no. Qhov icm no tuaj yeem ua tau siv lub crank bar hom ntaus ntawv.

Co-active icm (sim-icm)

Ib yam li cov kab ke icm, hom hom icm pib nrog cov lus qhia me ntsis kaw, tshwj tsis yog tias cov tuag pib thawb thiab siv lub zog tib lub sijhawm thaum cov khoom raug txhaj rau hauv kab noj hniav. Cov ntsia hlau extrusion thiab cov kab noj hniav tuag yuav muaj kev ncua ntawm s2 lossis s2 thaum lub sijhawm co- txav.

Txij li thaum lub polymer ntws pem hauv ntej yog ib txwm nyob rau hauv ib tug ruaj khov lub xeev ntawm ntws, nws tsis qhia lub pauses thiab nto ntws kab raws li nyob rau hauv cov txheej txheem seq-icm.

Txij li ob qho tib si ntawm cov txheej txheem no tawm hauv qhov chaw loj hauv qhov chaw pib ntawm kev ua haujlwm, thiab ua ntej molten polymer raug txhaj rau hauv kab noj hniav thiab ntsib cov kev taw qhia siab, nws yuav ntws ua ntej mus rau sab qis ntawm cov kab noj hniav vim yog lub ntiajteb txawj nqus thiab tuaj yeem tsim qhov tsis xav tau. npuas vim lub xeev unpressurized ib ntus.

Tsis tas li ntawd, qhov loj ntawm phab ntsa thickness ntawm ib feem, qhov loj ntawm cov kab noj hniav yuav yog, thiab qhov ntev ntawm qhov ntws yuav nce lub sij hawm rau cov pwm kaw kom tiav, tag nrho cov uas yuav exacerbate cov saum toj no phenomenon.

Ua pa-icm (ua pa-icm)

Nrog ua pa -icm, cov pwm raug kaw tag nrho thaum pib txhaj tshuaj. Yog li ntawd, cov polymer tseem nyob rau hauv siab sai li sai tau thaum nws txhaj. Qhov no kov yeej cov teeb meem uas tuaj yeem tshwm sim nrog ob txoj hauv kev tau hais tseg. Raws li cov polymer raug txhaj rau hauv cov kab noj hniav, cov pwm yog maj mam rub tawm thiab tsim qhov chaw loj dua, thaum lub polymer hauv kab noj hniav yog ib txwm nyob rau hauv siab.

Raws li cov khoom mus txog rau tag nrho cov kab noj hniav, cov pwm pib thawb rov qab kom txog thaum nws raug kaw tag, cia cov polymer kom compress ntxiv thiab ncav cuag qhov xav tau tiav thickness ntawm ib feem. Qhov saum toj no txav ntawm cov kab noj hniav txuas ntxiv ntawm cov pwm tuaj yeem ua tiav nrog kev pab ntawm kev txhaj tshuaj los ntawm cov polymer txhaj rau hauv cov kab noj hniav los yog ua ntej - cov lus tsa suab ntawm lub tshuab txhaj tshuaj molding.