Dab tsi yog qhov zoo ntawm thermosetting yas txhaj tshuaj molding?

Cov thermosetting yas feem ntau yog tsim los ntawm compression thiab txhaj tshuaj molding. Ob txoj kev no muaj cov txheej txheem ua haujlwm nyuaj, lub voj voog ua haujlwm ntev, kev ua haujlwm tsawg, kev siv zog siab, kev puas tsuaj yooj yim rau pwm, thiab tsis ruaj khov ua haujlwm zoo. Kev txhaj tshuaj molding ntawm thermosetting yas qhov chaw tuaj yeem hais tias yog kev hloov pauv loj ntawm thermosetting yas molding tshuab. Nws muaj qhov zoo ntawm kev ua haujlwm yooj yim, txo lub voj voog molding, txhim kho kev ua haujlwm zoo (5 ~ 20 zaug), txo kev siv zog, txhim kho cov khoom zoo, thiab pwm kev pab cuam lub neej ntev (kwv yees 100000 ~ 300000 zaug). Txawm li cas los xij, cov txheej txheem molding no muaj cov kev xav tau siab rau cov ntaub ntawv. Tam sim no, feem ntau siv yog phenolic plastics uas muaj ntoo hmoov los yog cellulose, ntxiv rau cov amino plastics, unsaturated polyester thiab epoxy resin.
Dab tsi yog cov yam ntxwv ntawm thermosetting yas txhaj tshuaj pwm?
1. Pouring system tsim
Vim hais tias cov thermosetting yas tsis tau rhuab rau qhov kub txaus hauv cov khoom ntim (kom tiv thaiv kev kho thaum ntxov) thaum lub sij hawm molding, nws cia siab tias qhov seem ntawm lub ntsiab khiav yuav me me kom muaj kev sib txhuam. Feem ntau, lub khob hliav qab ntawm lub ntsiab khiav yog 2 degree ~ 4 degree. Txhawm rau txhim kho thaj chaw saum npoo ntawm lub splitter kom yooj yim hloov cov cua sov, lub splitter nrog ncig los yog trapezoidal cross-section feem ntau yog siv, thiab qhov tob ntawm lub splitter yuav tsim nyog me me nyob rau hauv tib lub cross-sectional cheeb tsam. Kev xaiv lub hauv paus ntsiab lus ntawm lub rooj vag hom thiab qhov chaw yog qhov tseem ceeb tib yam li cov thermoplastic txhaj pwm, uas yog, qhov loj ntawm lub rooj vag taw tes yuav tsum tsis txhob me dhau, feem ntau tsis pub tsawg tshaj 1.2 hli, thiab qhov tob ntawm lub qhov rooj yuav tsum yog. xaiv nyob rau hauv 0.8 ~ 3 hli los tiv thaiv cov yaj kub los ntawm kev nce ntau dhau, ua kom cov tshuaj tiv thaiv kab mob sib kis, ua kom cov viscosity nce, thiab ua rau nws nyuaj rau sau cov pwm.
2. Push-out mechanism
Vim tias qhov kub thiab txias ntawm cov thermosetting plastics yog qis dua qhov kub thiab txias, cov khoom siv fluidity yog qhov zoo nyob rau hauv qee qhov molding, thiab nws tuaj yeem ntws mus rau hauv qhov khoob me me thiab ua flash. Yog li ntawd, thaum lub sij hawm tsim, pwm kaw qhov tseeb yuav tsum tau txhim kho, lub laub phaj laub mechanism yuav tsum tau zam, thiab cov splicing qhov chaw yuav tsum tau txo.
3. Kab noj hniav txoj hauj lwm layout
Vim yog lub siab txhaj tshuaj ntawm cov thermosetting yas, ntau dhau thiab flash yuav raug tsim tawm ntawm qhov chaw sib cais thaum pwm nyob rau hauv qhov tsis sib haum xeeb. Yog li ntawd, thaum txoj hauj lwm kab noj hniav yog teem, qhov chaw ntawm qhov projected cheeb tsam ntawm lub parting nto yuav tsum coincide nrog rau qhov chaw ntawm lub tshuab txhaj tshuaj clamping quab yuam kom ntau li ntau tau. Txoj haujlwm sab saud thiab qis ntawm cov thermosetting yas txhaj tshuaj pwm kab noj hniav muaj kev cuam tshuam zoo rau qhov kub thiab txias ntawm cov kab noj hniav sib txawv lossis qhov sib txawv ntawm tib lub kab noj hniav. Qhov no yog vim muaj kev cuam tshuam ntawm kev txav ntawm cov cua kub los ntawm hauv qab mus rau sab saum toj thaum lub sij hawm ntuj convection. Kev ntsuas qhov tseeb qhia tau hais tias cov cua sov nqus los ntawm sab sauv tuaj yeem sib txawv los ntawm ob zaug ntawm qhov qis. Yog li ntawd, txhawm rau txhim kho qhov xwm txheej no, qhov kev ncua deb ntawm cov kab noj hniav sab saud thiab sab qis yuav tsum tau txo qis thaum npaj ntau cov kab noj hniav.
4. Cov khoom siv pwm
Cov molding qhov chaw (kab noj hniav thiab cov tub ntxhais) ntawm thermosetting yas txhaj tshuaj pwm yuav tsum tau ua los ntawm cov ntaub ntawv uas zoo hnav tsis kam thiab tsawg nto roughness vim lub scouring nyhuv ntawm cov muab tub lim nyob rau hauv cov yas. Cov molding qhov chaw yuav tsum yog chrome plated los tiv thaiv corrosion.
Yuav ua li cas txog lub siab tuav lub siab thiab lub sij hawm ntawm thermosetting yas?
Kev tuav lub siab thiab tuav lub sij hawm ntawm thermosetting plastics ncaj qha cuam tshuam rau pwm kab noj hniav siab, nrog rau kev txhaws thiab qhov ntom ntawm cov yas. Lub siab tuav lub siab ntawm cov khoom siv thermosetting feem ntau tuaj yeem qis dua qhov kev txhaj tshuaj siab me ntsis, thiab lub sijhawm tuav lub sijhawm tseem tuaj yeem luv dua li ntawm cov thermoplastic txhaj, feem ntau 5 ~ 20s.
Lub voj voog molding ntawm thermosetting yas yog dab tsi?
Hauv kev txhaj tshuaj molding voj voog ntawm thermosetting yas, qhov tseem ceeb tshaj plaws yog lub sijhawm txhaj tshuaj thiab lub sijhawm hardening, ntxiv rau lub sijhawm tuav lub sijhawm thiab pwm qhib thiab siv sijhawm. Lub sij hawm txhaj tshuaj ntawm cov khoom siv thermosetting hauv tsev yog 2 ~ 10s, lub sij hawm tuav lub siab yog li 5 ~ 20s, lub sij hawm hardening yog xaiv nyob rau hauv 15 ~ 100s, thiab lub voj voog molding yog li 45 ~ 120s. Lub sij hawm hardening ntawm thermosetting plastics yuav tsum tsis tsuas yog xav txog cov qauv zoo, complexity thiab phab ntsa thickness ntawm cov yas, tab sis kuj xyuam xim rau cov khoom zoo, tshwj xeeb tshaj yog thaum txiav txim siab lub sij hawm hardening raws li lub siab tshaj plaws phab ntsa thickness ntawm cov yas. ntu. Feem ntau, lub sij hawm hardening ntawm cov khoom siv tshuaj txhaj tshuaj tom qab pwm tuaj yeem xam raws li cov phab ntsa siab tshaj plaws ntawm cov khoom yas thiab qhov hardening ntawm 8 ~ 12s / mm.