Dab tsi yog qhov txawv ntawm kev txhaj tshuaj molding thiab tshuab molding?

Dab tsi yog qhov txawv ntawm kev txhaj tshuaj molding thiab tshuab molding?

1. Cov txheej txheem ntawm kev txhaj tshuaj molding thiab tshuab molding yog txawv.Tshuab moulding yog txhaj + tshuab;txhaj tshuaj molding yog txhaj + siab;tshuab moulding yuav tsum muaj lub taub hau sab laug los ntawm lub tshuab raj, thiab kev txhaj tshuaj molding yuav tsum muaj lub rooj vag seem

2. Feem ntau hais lus, kev txhaj tshuaj molding yog lub cev muaj zog, tshuab moulding yog lub cev hollow, thiab cov tsos ntawm tshuab moulding tsis sib xws.Tshuab moulding muaj lub tshuab tshuab.

3. Txhaj tshuaj molding, uas yog, thermoplastic txhaj molding, uas cov khoom yas yog melted thiab ces txhaj rau hauv cov kab noj hniav zaj duab xis.Thaum cov yas molten nkag mus rau hauv pwm, nws yog txias rau hauv cov kab noj hniav zoo li lub cev.Cov duab uas tau tshwm sim feem ntau yog cov khoom kawg thiab tsis muaj kev ua haujlwm ntxiv ua ntej cov khoom siv lossis siv los ua cov khoom kawg.Ntau cov ntsiab lus, xws li cov thawj coj, cov tav, thiab cov xov, tuaj yeem tsim hauv ib qho kev txhaj tshuaj molding.Lub tshuab txhaj tshuaj molding muaj ob yam tseem ceeb: cov cuab yeej txhaj tshuaj uas yaj thiab txau cov yas rau hauv pwm, thiab cov cuab yeej clamping.Cov nyhuv ntawm cov khoom siv pwm yog:

1) Cov pwm raug kaw raws li qhov tau txais kev txhaj tshuaj siab;

2) Tshem cov khoom tawm ntawm cov khoom siv txhaj tshuaj kom yaj cov yas ua ntej nws txhaj rau hauv pwm, thiab tom qab ntawd tswj lub siab thiab ceev kom txhaj cov yaj mus rau hauv pwm.Muaj ob hom kev txhaj tshuaj siv niaj hnub no: ntsia hlau pre-plasticizer lossis ob-theem khoom, thiab cov ntsia hlau reciprocating.Ntsia hlau pre-plasticizers siv lub pre-plasticizing ntsia hlau (thawj theem) los txhaj cov yas molten rau hauv ib qho kev txhaj tshuaj pas nrig (theem thib ob).Cov txiaj ntsig ntawm cov ntsia hlau ua ntej-plasticizer yog qhov ruaj khov zoo, kev kub siab thiab kev kub ceev, thiab kev txhaj tshuaj ntim tswj tau meej (siv cov cuab yeej siv hluav taws xob ntawm ob qho kawg ntawm piston stroke).

Cov txiaj ntsig no yog xav tau rau cov khoom lag luam ntshiab, nyias-walled thiab cov nqi ntau lawm.Qhov tsis zoo suav nrog lub sijhawm nyob tsis sib xws (ua rau cov khoom siv degradation), cov khoom siv ntau dua thiab cov nqi tu.Cov khoom siv ntau dua reciprocating ntsia hlau txhaj tshuaj tsis tas yuav muaj lub plunger kom yaj thiab txhaj cov yas.

Tshuab moulding: tseem hu ua hollow tshuab moulding, tshuab moulding, ib txoj kev tsim yas sai sai.Lub tubular yas parison tau los ntawm extrusion los yog txhaj molding ntawm thermoplastic resin yog muab tso rau hauv ib tug cais pwm thaum nws yog kub (los yog rhuab mus rau ib tug softened xeev), thiab compressed cua yog nkag mus rau hauv lub parison tam sim ntawd tom qab kaw lub pwm los tshuab yas parison. .Nws nthuav thiab lo ze rau sab hauv phab ntsa ntawm cov pwm, thiab tom qab txias thiab demoulding, ntau yam khoom hollow tau txais.Cov txheej txheem ntawm cov tshuab cua tshuab yog zoo heev nyob rau hauv lub hauv paus ntsiab lus rau tshuab molding ntawm hollow khoom, tab sis nws tsis siv ib tug pwm.Los ntawm qhov kev xav ntawm cov txheej txheem yas txheej txheem kev faib tawm, cov txheej txheem molding ntawm cov tshuab tshuab feem ntau suav nrog hauv extrusion.Cov txheej txheem tshuab moulding yog thawj zaug siv los tsim cov polyethylene vials tsawg-density thaum Ntiaj Teb Tsov Rog II.Thaum xyoo 1950s, nrog rau kev yug me nyuam ntawm high-density polyethylene thiab kev loj hlob ntawm tshuab moulding tshuab, tshuab moulding txuj ci tau dav siv.Lub ntim ntawm hollow ntim tuaj yeem ncav cuag ntau txhiab litres, thiab qee qhov kev tsim khoom tau txais kev tswj hwm lub computer.Plastics haum rau tshuab moulding muaj xws li polyethylene, polyvinyl chloride, polypropylene, polyester, thiab lwm yam., thiab cov tau hollow ntim tau lug siv raws li industrial ntim ntim.