Kev tshaj lij chaw tsim khoom ntawm cov tshuab thermoforming.
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Kev tshaj lij chaw tsim khoom ntawm cov tshuab thermoforming.
Kev ua haujlwm ntawm ntau txoj kev sib sau yog tsuas yog khoov thiab ncab daim ntawv preheated raws li qhov yuav tsum tau ua los ntawm kev siv lub zog. Qhov tseem ceeb tshaj plaws uas yuav tsum tau ua rau molding yog ua kom cov phab ntsa tuab ntawm cov khoom sib xws li qhov ua tau. Lub ntsiab yog vim li cas rau qhov tsis sib xws ntawm phab ntsa thickness ntawm cov khoom yog: ua ntej, lub degree ntawm stretching ntawm txhua feem ntawm daim ntawv tsim yog txawv; Thib ob, qhov loj ntawm qhov ncab nrawm, uas yog, cov roj ntws ntawm cov pa tawm thiab kev nce nqi lossis qhov txav nrawm ntawm pwm, clamping thav duab thiab ua ntej stretching plunger. Kev sib sau yog lwm cov txheej txheem tseem ceeb tom qab phaj (daim ntawv) cua sov, nrog rau kev tswj cov txheej txheem tseem ceeb xws li kev sib sau kub, sib sau siab thiab sib sau ceev.
①Yas Thermoforming Tshuab Txoj Kev Kub Kub
Tom qab cov khoom siv, cov txheej txheem hom thiab cov cuab yeej raug txiav txim siab, qhov ntsuas kub yog qhov tseem ceeb cuam tshuam rau cov khoom lag luam zoo, uas cuam tshuam ncaj qha rau qhov tsawg kawg nkaus thickness, thickness faib thiab qhov tsis zoo ntawm cov khoom, thiab tseem cuam tshuam rau elongation thiab tensile lub zog ntawm cov khoom. , thiab txawm cuam tshuam rau kev sib sau ceev. Yog li ntawd, nws yuav tsum tau ua tiag tiag. Thaum cov ntawv thermoforming yog rhuab, xyuas kom meej tias tag nrho cov txheej txheej yog rhuab sib npaug thiab qhov kub thiab txias yog qhov tsim nyog.
Raws li kev xyaum, qhov zoo tshaj plaws molding kub yog qhov kub ntawm qhov elongation ntawm yas yog siab tshaj plaws. Yog tias qhov kev ntxhov siab tshwm sim los ntawm molding siab ntau dua lub zog tensile ntawm cov yas ntawm qhov kub thiab txias, daim ntawv yuav dhau los ua deformed thiab txawm tias puas. Lub sijhawm no, qhov kub thiab txias molding yuav tsum raug txo kom tsawg. Kev kub molding qis tuaj yeem txo lub sijhawm txias thiab txuag lub zog, tab sis cov duab thiab qhov ruaj khov ntawm cov khoom yuav tsis zoo, thiab cov ntsiab lus txhais yuav tsis zoo. Ntawm qhov kub molding siab, qhov rov qab ntawm cov khoom ua me me, thiab cov duab thiab qhov loj me yog ruaj khov. Txawm li cas los xij, qhov kub thiab txias heev yuav ua rau cov resin degradation thiab cov khoom tawg. Hauv cov txheej txheem thermoforming tiag tiag, muaj qee lub sijhawm luv ntawm cov cua sov thiab kev tsim cov ntawv, thiab qee qhov cua sov yuav ploj mus, tshwj xeeb tshaj yog rau cov ntawv nyias nyias nrog lub peev xwm tshwj xeeb me me. Qhov tseeb cua sov ntawm daim ntawv yog qhov siab, thiab qhov zoo tshaj plaws ua kom sov yog feem ntau txiav txim siab los ntawm kev sim thiab ntau lawm.
Lub stretching ceev yog ze ze rau qhov kub thiab txias thaum daim ntawv yog tsim. Yog tias qhov kub thiab txias ntawm daim ntawv deformation muaj tsawg, daim ntawv yuav tsum tau ncab maj mam. Yog hais tias qhov siab stretching ceev tau txais yuav, qhov kub thaum lub sij hawm ncab yuav tsum tau nce. Txij li thaum daim ntawv tseem radiates tshav kub thiab txias thaum lub sij hawm molding, lub stretching ceev ntawm nyias daim ntawv yog feem ntau siab tshaj ntawm cov ntawv tuab.
②Yas Thermoforming Tshuab Tsim Siab
Cov nyhuv ntawm lub siab ua rau daim ntawv deform, tab sis cov khoom muaj peev xwm tiv taus deformation, thiab nws cov elastic modulus txo nrog qhov kub thiab txias. Thaum lub molding kub, tsuas yog thaum muaj kev ntxhov siab tshwm sim los ntawm lub siab nyob rau hauv cov khoom yog ntau tshaj li elastic modulus ntawm cov khoom ntawm qhov kub thiab txias, cov khoom yuav deformed. Yog hais tias lub siab thov ntawm ib tug tej yam kub tsis txaus los tsim txaus elongation ntawm cov khoom, lub molding yuav smoothly tsim los ntawm kev nce lub molding siab los yog nce lub molding kub. Vim tias cov qauv elastic ntawm ntau yam khoom sib txawv thiab muaj qhov sib txawv ntawm qhov kub thiab txias, molding siab sib txawv nrog cov polymer hom (xws li tus txheeb ze molecular hnyav), daim ntawv thickness thiab molding kub. Feem ntau hais lus, plastics nrog siab molecular saw rigidity, siab molecular hnyav thiab polar pawg xav tau siab molding siab.
Ntxiv rau qhov cuam tshuam ntawm molding kub, pwm kub thiab cov nyhuv kos duab, cov khoom tiav tiav ntawm cov khoom siv thermoformed feem ntau yog nyob ntawm qhov zoo molding siab ntawm cov thermoformed qhov chaw thiab pwm.
Qhov dav dav molding siab rau molding (txiv neej pwm): 0.2-0.3mpa rau qhov loj-moulded qhov chaw; Qhov me me mus txog 0.7MPa. Rau lub tshuab nqus tsev molding, lub molding siab yog tsawg thiab feem ntau nyob ntawm lub atmospheric siab. Ntawm qhov siab ntawm 0, thaum siv lub tshuab nqus tsev zoo, lub siab molding tuaj yeem ncav cuag li 1 MPa.
Txij li thaum lub siab tsim los ntawm lub tshuab nqus tsev yog sib npaug rau qhov sib txawv ntawm lub siab ntawm atmospheric siab ntawm ib sab ntawm cov khoom molding thiab lub tshuab nqus tsev generated nyob rau sab, lub molding siab nyob ntawm cov huab cua siab thiab sealing degree. Yog li ntawd, txawm tias siv lub tshuab nqus tsev twj tso kua mis zoo tshaj plaws, lub siab molding yuav txo qis nrog qhov nce ntawm qhov siab.
③Yas Thermoforming Tshuab Txoj kev ceev
Lub ntsiab yog vim li cas rau qhov tsis sib xws ntawm phab ntsa thickness ntawm cov khoom yog: ua ntej, lub degree ntawm stretching ntawm txhua feem ntawm daim ntawv tsim yog txawv; Thib ob, qhov loj ntawm qhov ncab nrawm, uas yog, cov roj ntws ntawm cov pa tawm thiab kev nce nqi lossis qhov txav nrawm ntawm pwm, clamping thav duab thiab ua ntej stretching plunger. Kev sib sau ceev yog hais txog qhov nrawm ntawm daim phaj (daim ntawv). Kev ua kom nrawm nrawm tuaj yeem ua rau lub voj voog ua kom luv thiab muaj txiaj ntsig zoo rau kev txhim kho cov khoom lag luam. Txawm li cas los xij, kev sib sau ntau dhau yuav cuam tshuam rau qhov zoo ntawm cov khoom. Feem ntau hais lus, kev kub ceev yog qhov zoo rau kev tsim nws tus kheej thiab ua kom lub sij hawm luv luv, tab sis kev kos duab nrawm feem ntau ua rau cov phab ntsa thickness ntawm concave thiab convex qhov chaw ntawm cov khoom kom nyias nyias vim tsis txaus txaus; Txawm li cas los xij, yog tias qhov ncab qeeb dhau lawm, lub peev xwm deformation ntawm daim ntawv yuav txo qis vim txias dhau, thiab cov khoom yuav tawg.
Cov pwm ua haujlwm yog tsav los ntawm hydraulic siab, cua siab lossis lub cev muaj zog. Thaum lub sij hawm kub sib sau, lub phaj yas (daim ntawv) yuav ncab thiab deformed nyob rau hauv lub siab los yog plunger. Lub stretching ceev ntawm cov khoom yog txawv nrog rau txoj kev ceev. Kev khiav ceev ntawm pwm tuaj yeem tswj tau los ntawm qib, thiab hom kev nrawm ua ntej thiab qeeb tom qab yog feem ntau xaiv. Qhov kev txiav txim ceev ntawm cov pwm yuav tsum sib phim nrog lub pre stretching ceev. Yog tias qhov kev txiav txim qeeb dhau, qhov kub ntawm lub phaj yuav txo qis, uas tsis tsim nyog rau kev sib sau, thiab yog tias qhov kev txiav txim siab dhau lawm, lub phaj yuav torn. Rau daim ntawv nrog ib tug tej thickness, cov cua kub kub yuav tsum tau kom zoo thiab cov txheej txheem ceev yuav tsum tau saws.
Kev tshaj lij chaw tsim khoom ntawm cov tshuab thermoforming.
