Lub hauv paus ntsiab lus ntawm hollow tshuab moulding khoom thiab nws txoj kev molding Lub thiaj li hu ua tshuab moulding tshuab tseem hu ua hollow tshuab moulding tshuab.Cov yas yog melted thiab quantitatively extruded nyob rau hauv cov ntsia hlau extruder, thiab ces tsim los ntawm lub qhov ncauj zaj duab xis, thiab ces txias los ntawm lub nplhaib cua, thiab ces tshuab mus rau hauv lub pwm.Txoj kev loj hlob sai ntawm plastics ua txoj kev.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.
Lub tshuab moulding tshuab / txheej txheem pib siv los tsim cov polyethylene vials tsawg ntom ntom 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 tshuab moulding tshuab tau dav siv.Lub ntim ntawm cov thawv hollow tuaj yeem ncav cuag ntau txhiab litres, thiab qee qhov kev tsim khoom tau raug tswj los ntawm cov khoos phis tawj.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.
Taw qhia rau txoj kev molding ntawm hollow tshuab molding:
Vim qhov sib txawv ntawm cov khoom siv raw, kev ua haujlwm, cov khoom siv thiab cov nqi, cov tshuab molding sib txawv muaj qhov zoo sib txawv hauv kev ua cov khoom sib txawv.
Lub tshuab molding ntawm cov khoom hollow muaj peb txoj hauv kev tseem ceeb:
1. Extrusion tshuab moulding: tsuas yog siv rau kev ua haujlwm tsis muaj kev txhawb nqa;
2. Txhaj tshuab moulding: feem ntau yog siv rau kev ua parison txhawb los ntawm cov tub ntxhais hlau;
3. Stretch tshuab moulding: suav nrog extrusion-stretch-blow molding, txhaj-stretch-blow molding ob txoj kev, tuaj yeem ua cov khoom siv biaxially oriented, txo cov nqi ntau lawm thiab txhim kho cov khoom lag luam.
Tsis tas li ntawd, muaj ntau txheej tshuab moulding, compression tshuab moulding, dip txheej tshuab moulding, ua npuas ncauj tshuab moulding, peb-dimensional tshuab molding, thiab lwm yam. Tab sis 75% ntawm tshuab moulding khoom yog extrusion tshuab moulding, 24% yog txhaj tshuab moulding. , thiab 1% yog lwm yam tshuab molding;ntawm tag nrho cov tshuab moulding khoom, 75% belongs rau biaxially oriented khoom.Qhov zoo ntawm extrusion tshuab moulding yog kev ua haujlwm siab, cov khoom siv qis, kev xaiv ntau ntawm cov pwm thiab cov tshuab, thiab qhov tsis zoo yog cov khoom seem siab, tsis zoo siv dua thiab siv cov khoom seem, cov khoom thickness tswj, thiab cov khoom dispersibility.Tom qab ntawd, nws yog ib qho tsim nyog yuav tsum tau ua cov haujlwm trimming.Qhov zoo ntawm kev txhaj tshuaj molding yog tias tsis muaj pov tseg hauv cov txheej txheem ua, thiab cov phab ntsa tuab ntawm cov khoom thiab cov khoom tawg tuaj yeem tswj tau zoo.Qhov tsis zoo yog tias cov khoom siv molding yog kim thiab rau qee qhov tsuas yog tsim rau cov khoom me me tshuab molded.
Cov txheej txheem ntawm hollow tshuab moulding xav kom cov cua compressed inflating parison hauv pwm yuav tsum huv.Cov cua siab rau kev txhaj tshuaj molding yog 0.55 txog 1 MPa;Lub siab rau extrusion tshuab moulding yog 0.2l txog 0.62 MPa, thiab lub siab rau stretch tshuab moulding feem ntau yuav tsum siab li 4 MPa.Nyob rau hauv lub solidification ntawm plastics, lub siab tsis tshua muaj siab ua rau lub internal kev nyuaj siab ntawm cov khoom tsawg, qhov kev nyuaj siab dispersion yog ntau uniform, thiab cov uas tsis muaj kev nyuaj siab yuav txhim kho lub tensile, cuam tshuam, dabtsi yog khoov thiab lwm yam khoom ntawm cov khoom.
Post lub sij hawm: Nov-21-2023