Yuav muaj txoj caij uas zoo li cas los ntawm kev siv kev lag luam tsim plastic rau kev tsim khwv tseemcees khib?

Thermal break strips, txaus siab polyamide-based, tseem nyob ze rau kev tsim kho tshuaj ntau thiab tseem ceeb kom tau txais lub tshuab tseem ceeb. Yog tias thermal break strip manufacturer uas muaj kev paub txog R&D dhau los ntawm 2006, peb pom tias plastic extrusion technology yog qhov zoo tshaj plaws thiab yooj yim tshaj rau kev tsim kho cov thermal break strips zoo. Los ntawm peb lub chaw pab ib leeg—tsim los ntawm kev sib xyaw nrog cov neeg tsim extruder thiab mold manufacturers kom tsim cov Polywell—peb siv plastic extrusion kom muab cov thermal break strips zoo, nyob siab, thaum kuj pab cov neeg siv khoom nrog kev pab txhawb mus txog thaum pib mus rau thaum teem.

Zoo dua rau kev sib raug zoo ntawm Polyamide thiab Glass Fiber Reinforcement

Daim ntawv zoo rau Polyamide’s Unique Properties

Polyamide (nylon) yog qhov chaw tsim nyog rau kev khiav hluv kub vim nws muaj kev tso kub tshaj tshuab thiab muaj zog siab, tab sis nws xav tau kev them nyiaj meej meej kom pom qhov zog tshaj tshuab. Txoj hlua tshuaj plastic—txhua yam thaum sib xyaw nrog peb cov chaw tsim khoom—txheeb xyuas polyamide's sensitivity rau kub thiab viscosity. PeB cov extruders single-screw (qhov chaw tsim khoom uas yog ib leeg uas tuaj yeem tsim thermal break strips, vim twin-screw extruders tsuas yog siv rau granulation) siv lub system ntawm kev ntxuav dav dav (230-245°C rau PA66) kom thawv polyamide tsis txhob tshuab nws tus cwj pwm molecular. Kev them nyiaj no pab tsave kev tso kub kub ntawm polyamide, kom ntawv strips cuav kab muaj kev tso kub ntawm 0.3 W/(m·K)—sib txuas rau kev tshem tso kub nyob rau hauv qhov raj mis.

Kev them nyiaj meej meej ntawm roj fiberglass los ntawm Twin-Screw Extrusion

Kev txhawb nqa roj tog ntseeg yog qhov tseem ceeb rau kev nthuav dav zog rau kev khiav hluv, tab sis kev faib roj tog tsis zoo yuav tshwm sim kev sov dua lossis tshwm ib qho teeb meem nyob hauv kev tsim khoom. Peb lub tsev chawksim plastic pib nrog cov extruders ob xov rau kev tsim kho, qhov tseem ceeb hauv kev siv plastic extrusion uas muaj peev xwm zoo heev rau kev lag luam. Cov xov ob no sib kab tso roj tog hluv hluv rau hauv polyamide, tsim tau qhov chwntxruas ntau. Txawv npaug ntawm kev tsim kho nrog xov ib (uas feem ntau tshwm sim roj tog tso tag), qhov kev ua no thiaj li faib roj tog nrog 25-30% thiab nthuav zog tawm siab txaus tias tuaj yeem tso siab dua 82 MPa. Thaum cov kho no zoo tshaj plaub mus rau hauv cov extruders xov ib rau kev khiav hluv, kev siv plastic extrusion txhim kho cov roj tog kom nyob ib ncig, tiv thaiv kev ruaj siab uas yuav cuam tshuam rau kev ua haujlwm. Qhov kev hloov pauv zoo no los ntawm kev tsim kho nrog xov ob mus rau kev khiav hluv nrog xov ib yog qhov tseem ceeb tshaj plaws hauv lub tsev chawksim plastic.

Kev Pab Cuam Loj Hlau Thiab Kev Tsoom Foom Tsheej

Tsoom Foom Tsheej Rau Kev Tuag Loj Hlau

Kev tso cai rhaub plastic tuaj yeem tsoom foom tsheej tau ntau—tsis muaj leej twg tuaj yeem tshwm sim rau kev tuag ntau. Cov tswv yim tuag (xws li kev tso cai rhaub) yuav tsum tau hloov mold ntau zaus thiab tuag raw theem, yog li ntawd yuav tsum sau tom qhov xwm txheej. Koj tus extruder sib txawv ob tog no, uas yog ib qhov pib tshaj plaws hauv kev tso cai rhaub plastic, tuaj yeem tsoom foom tsheej 24/7 nrog qhov kho mob tsawg heev, tsoom foom tsheej 3-5 kg ntawm thermal break strips saum teev. Qhov tsoom foom tsheej no cuam tshuaj rau 40% kom luv dua li kev tuag theem. Txhawm rau pab kom muaj kev pab cuam ib txhim, peb kuj tso cov chaw pab (xws li automatic granule feeders thiab strip cutters) nrog rhaub tso cai rhaub, kom tsis muaj qhov kho mob ntawm cov khoom mus rau khoom tiav. Qhov tso ntxiv no yuav tshem tawm qhov delay ntawm kev tsoom foom tsheej los, kom kev pab cuam loj dua.

Hloov Cov Ntaub Ntawv Nrog Luv Luv Rau Kev Xaiv

Qhov chaw sov tshuab muaj ntau qhov caij (10-30mm, thickness 1.5-3mm) kom raug rau ntau yam qhov rooj hlwb, thiab tshuab tsis plastic tuaj yeem hloov kho ntau yam kev xav tau. Peb tshuab tsis plastic muaj panel kho sib txuas uas pheej hmong tso koj ua lej hloov pauv (screw speed, temperature, die gap) nyob ze. Piv txwv li, hloov los ntawm 20mm mus rau 25mm qhov caij yog tias tsuas yog hloov qhov tseem ceeb ntawm die thiab hloov ntxiv 5-10 rpm—thiab qhov no tuaj li 15 feeb, nyob rau siab dua li hloov mold nyob rau lwm txoj hauv kev. Qhov zoo no pab rau kev lag luam hloov kho raws li kev xav tau tsis txhob lossis tsis muaj kev nyab xeeb, qhov tseem ceeb nyob rau hauv kev lag lag sov.

Txoj caij zoo tshwj tsis thiab qhov caij meej meej

Qhov caij zoo tshwj thiab qhov caij ntawm saum

Txoj caij nplaum kub txhaj tshuaj muaj feem tshuaj xyooj siab kom meej meej los ntawm kev nruj rau hauv qhov chaw sib thooj ntawm hlav thiab hluv—tsuas yog qhov sib txawv 0.05mm tuaj yeem ua rau kub dhau lossis kub ntaws tau. Kev siv technology tsim kho hlau thiab nrog rau kev siv kab ntau sib xws, yuav pab tau nyob rau hauv qhov chaw tseem ceeb no. Qhov chaw tsim kho hlau muaj kab ntau tsim kho uas peb tau tsim nrog peb lub hom chaw tsim kho (muaj qhov sib txawv zoo ib xws thiab qhov ntau muaj kev tswj hwm los ntawm micrometer). Qhov chaw tsim kho hlau muaj kev ruaj khov (18-20 MPa) uas pab tau rau polyamide huv mus rau hauv qhov chaw ntau tas li, tsim tau cov txheej nplaum uas tsis sib txawv ntau (≤0.03mm). Qhov kev tsim kho hlau no kuj pab tau rau qhov chaw nplaum muaj qhov surface finish zoo (Ra ≤0.8μm), yog li tsis tas yuav tshuaj xyooj tom qab nplooj ntaus. Qhov zoo meej meej no pab kho dua rau tus naj npawb tshuaj xyooj mus rau ≤1%, uas tsawg dua tshaj qhov tseem ceeb ntawm 3-5% nyob rau hauv cheeb tsam no.

Zoo meej meej hauv kev ua haujlwm thiab kub

Qhov kev siv txoj kev pab los tshuab cov ntaub ntawv plastic zoo li qhov tseem ceeb rau kev tsim khoom tshwj tsis yog ib qho chaw twg muaj kev cuam tshuam. Peb cov granulation nrog ob qhov rooj sib tw (ntawm qhov ua npe ua ib qho chaw kho) tsim tso cov granules uas muaj kev hloov pauv sib xws (1.13-1.15 g/cm³), thiab qhov kev tshuab nrog ib qhov rooj sib tw tuaj yeem tswj kom tsis txhob kheej khaus lossis sib lag luam tsis zoo. Vim li ntawd, txhua lub strip muaj qhov tshwm sim zoo sib xws, kev sib txig sib lauj ntawm kheat, thiab kev txaus siab rau kheat (-40°C mus rau 80°C). Peb nrhiav xyuas tag nrho cov ntaub ntawv los ntawm txhua qhov tshuab kom paub meej tias nws zoo, thiab peb kev pab nqa dej ib chav muaj feem rau kev ceeb toom no rau cov neeg siv khoom—thiab tias lawv tau txais cov strip uas raug rau standard sab nraud zoo li GB/T 23615.1.

Kev nyiag siab rau kev tshuab ntev

Txo cov khoom siv tsis txaus

Daim ntawv qhia kev lag luam plastic yuav tshem ceev qis tshaj plaws rau kev lag luam, uas yog qhov tseem ceeb rau kev lag luam. Kev tsim kho tshuab ntxig nyob rau hauv chav tsim kho tau siv khoom siv raw materials tas li—daim duab polyamide siv dua tuaj yeem rov sau ua daim ntawv qhia rov qab mus rau hauv chav tsim kho (tom qab rov sau los los ntawm peb lub twister extruders), tshem ceev qis mus rau ≤2%. Tom qab no, cov txheej xeem tsim kho tshiab feem ntau tshem ceev qis 5-10% los ntawm kev nruj thiab kev hloov kho. Peb lub chav pabcuam ib xeeb muab kev qhia txog kev rov sau khoom siv, pab cov neeg siv khoom kom ceev qis raw material cost thaum rov qab tshem ceev qis tshaj plaws rau hauv qabchaws.

Ceev qis tshaj plaws thiab ceev qis kev lag luam

Pej xeem tsav ntxwv dej ua haujlwm rau kev siv tau ntev, kom khawm yeev tua nqi. Lub tshuab tsav ntxwv dej muaj lub cev thiab lub khaum nyiaj uas tau raug kho los siv tau ntev (50-52 HRC) uas tso caij tsis txhob hlawv, siv tau txog li 5 xyoo nrog kev daws ntsig tas li. Lub tshuab ntxwv dej twg muaj ob lub cev, muaj qhov chaw siv tau ntev uas yooj yim kho dua, kom kho sai dua. Tom qab pej xeem cov kev pab txhawb lag luam, pej muab cov kev daws ntsig kho tagnrho (kev saib xyuas hli, kev saib xyuas txhua plaub hlis), thiab muab ntaub ntawv kho tshiab, kom lub tshuab tsav ntxwv dej haujlwm zoo, tsis tuaj yeem ncua. Qhov tseeb no yuav pab kom tua nqi haujlwm ntev, yog li ntawd kev tsav ntxwv dej yuav zoo dua rau cov neeg tsav ntxwv dej rau kev lag luam.

Nyiaj ntoo pib tshaj tshwm kev ua lej ntoo pib tshwm kev ua lej— kev raug zoo nrog duab ntoo pib tshwm, kev ua lej ntau, kev ua lej zoo, thiab kev nyiaj ntau— yog tshwm kev ua lej tshwm kev ua lej nyob hauv kev tsav tsheb tshwm kev ua lej. Kev nyiaj ntau tshwm kev ua lej 17 xyoo, thiab kev nyiaj ntau tshwm kev ua lej (kev ua lej ntoo pib tshwm, kev ua lej ntoo pib tshwm, kev ua lej ntoo pib tshwm, thiab kev ua lej ntoo pib tshwm), kev nyiaj ntau tshwm kev ua lej kev nyiaj ntau tshwm kev ua lej kev nyiaj ntau tshwm kev ua lej. Yuav tshwm kev ua lej ntoo pib tshwm kev ua lej ntoo pib tshwm, kev ua lej ntoo pib tshwm kev ua lej ntoo pib tshwm— tshwm kev ua lej ntoo pib tshwm— kev ua lej ntoo pib tshwm kev ua lej ntoo pib tshwm.