Teeb meem nrog Burrs nyob rau hauv Txhaj Moulded khoom

Burrs (tseem hu ua flying edges los yog overflow edges) yog qhov tsis xws luag feem ntau hauv kev txhaj tshuaj molding, xa mus rau cov npoo ntxhib tsim thaum cov yas yaj dhau los ntawm qhov chaw sib cais lossis cov sliders ntawm cov pwm. Lawv tsis tsuas yog cuam tshuam rau cov tsos, tab sis kuj yuav ua rau sib dhos jams thiab qhov sib txawv ntawm qhov sib txawv, ua rau lub zog ntawm cov khoom tsis muaj zog. Kab lus no, raws li kev paub dhau los, nthuav tawm qhov ua rau ntawm burrs, kev hloov kho, thiab kev ceev faj los pab cov kws kho mob sai sai daws cov teeb meem thiab txhim kho tus nqi tawm los.

 

1. Cov laj thawj tseem ceeb ntawm burrs (precondition for precise adjustment)

Lub ntsiab lus ntawm burrs yog tias lub siab ntawm cov yas yaj ntau tshaj qhov txwv uas qhov sib txawv pwm tuaj yeem tiv taus. Cov laj thawj tseem ceeb tuaj yeem muab faib ua plaub pawg, thiab lawv yuav tsum raug txheeb xyuas thiab nyob ua ntej hloov kho:

1.1 Pwm yam (qhov tseem ceeb tshaj plaws)

Qhov raug thiab hnav ntawm pwm ncaj qha txiav txim qhov tshwm sim ntawm burrs. Yam tseem ceeb cuam tshuam:

Tsis txaus qhov tseeb ntawm parting nto:Tsis haum (qhov sib txawv tshaj 0.02mm yuav ua rau burrs). Qhov no feem ntau tshwm sim los ntawm kev ua thiab sib dhos sib txawv.

Pwm hnav / deformation:Vim lub sij hawm ntev - ntau lawm, qhov chaw sib cais, pins, thiab lwm yam yuav hnav, los yog cov khoom yuav deform nyob rau hauv siab vim lub zog tsis txaus, ua rau muaj qhov sib txawv.

Exhaust qauv yog tsis tsim nyog:Cov qhov tso pa tawm tau txhaws, cov qhov qhib yog qhov ntiav dhau, thiab cov pa roj hauv cov pwm kab noj hniav tsis tuaj yeem raug tso tawm, ua rau muaj kev nce siab sai heev uas cuam tshuam qhov sib txawv.

Kev tsim lub rooj vag tsis zoo:Txoj hauj lwm tsis zoo, qhov loj me, kev nkag mus sai ntawm cov khoom molten rau hauv kab noj hniav, thiab lub zog hauv zos ntau dhau ua rau cov dej ntws tawm.

1.2 Kev teeb tsa tsis tsim nyog ntawm cov txheej txheem tsis zoo (yooj yim kho)

Cov txheej txheem tsis ncaj qha ua rau tsim flash. Tsom rau 5 lub ntsiab lus tseem ceeb:

Kev txhaj tshuaj ntau dhau:Tshaj li qhov txwv uas cov pwm tuaj yeem tiv taus, ua rau cov yaj mus dhau, yog ib qho yuam kev ua los ntawm cov neeg pib tshiab.

Kev txhaj tshuaj nrawm dhau lawm:Kev txhaws nrawm ua rau cov pa tsis zoo, nrawm nrawm nrawm, thiab cov yaj tawg los ntawm qhov sib cais.

Tshaj kub yaj:Ntxiv fluidity, txo viscosity, thiab yooj yim nkag mus ntawm qhov khoob me me hauv pwm (tshwj xeeb tshaj yog pom hauv PE, PP, thiab ABS).

Kev tuav tuav tsis raug tsis raug:siab dhau heev lawm thiab lub sij hawm ntev, nruam compression ntawm cov yaj ua rau overflow;

Tsis txaus clamping quab yuam:tsawg tshaj li qhov melt expansion siab, qhov parting nto yog stretched qhib, thiab lub melt overflows.

1.3 Yas raw khoom yam tseem ceeb

Kev ua tau zoo ntawm cov khoom siv raw cuam tshuam rau cov dej ntws ntws, tsis ncaj qha ua rau tsim cov burrs:

Ntau dhau fluidity:Tsawg-cov ntaub ntawv viscosity lossis cov yas yas ntau dhau ua rau cov yaj tau yooj yim nkag mus rau qhov sib txawv pwm;

Ntau dhau impurities:Kev suav nrog cov khoom txawv teb chaws, cov dej noo los yog cov khoom tsis sib xws cuam tshuam qhov sib xws ntawm cov yaj, ua rau muaj qhov txawv txav.

Kev ziab tsis txaus:Cov hygroscopic plastics xws li PA thiab PET tsis tau qhuav kom huv si. Thaum molding, noo noo evaporated thiab lub siab nce.

1.4 Yam khoom siv

Cov xwm txheej txawv txav ntawm lub tshuab txhaj tshuaj molding indirectly ua rau flash. Kev ntsuam xyuas tseem ceeb yuav tsum tau ua:

Locking mechanism tsis ua hauj lwm:Roj lub tog raj kheej to, rub qws deformation, tsis txaus los yog tsis sib npaug locking quab yuam;

Txhaj tshuaj tsis ua haujlwm:Cov ntsia hlau thiab kos valve raug hnav, thiab qhov kev txhaj tshuaj siab hloov pauv.

Deviation nyob rau hauv cov khoom parallelism:Cov qauv tsis yog sib npaug, thiab cov pwm tsis sib npaug sib npaug thaum lub sijhawm kaw, ua rau muaj qhov sib txawv ntxiv.

II. Txoj Kev Hloov Kho Core

Kev kho lub hauv paus ntsiab lus: Ua ntej kho cov txheej txheem (tus nqi qis, kev ua haujlwm yooj yim), tom qab ntawd xyuas cov pwm (txhim kho qhov laj thawj), thiab thaum kawg xyuas cov khoom siv raw thiab cov khoom siv kom tsis txhob 盲目ly dismantling cov pwm.

2.1 Thawj kauj ruam: Kho cov txheej txheem tsis

Tsom ntsoov rau kev kho 5 qhov tseem ceeb, thiab maj mam optimize:

(1) Txo kev txhaj tshuaj siab (core)

Ua raws li lub hauv paus ntsiab lus ntawm " maj mam txo thiab saib xyuas hauv lub sijhawm tiag tiag": Txo cov hauv paus pib los ntawm 10% -15%, tsim 3-5 daim rau kev sim ntau lawm; yog tias muaj cov khoom tsis txaus, kho rov qab los ntawm 5% -8% kom sib npaug; rau cov khoom siv, siv segmented txhaj tshuaj kom tsis txhob muaj kev kub ntxhov hauv zos.

(2) Txo kev txhaj tshuaj nrawm

Txo los ntawm 10%-20% txhua lub sijhawm, tswj qhov nrawm nrawm ntawm qhov sib cais; rau nyias- cov khoom siv phab ntsa thiab cov khoom nyuaj, txais yuav hom "slow-fast-slow" thiab khaws lub sijhawm tso tawm.

(3) Txo qhov kub thiab txias

Txo los ntawm 5-10℃raws li hom yas: PE, PP tswj ntawm 180-220 degree, ABS, PA tswj ntawm 220-260 degree, zam cov khoom tsis txaus.

(4) Kho qhov ntsuas qhov ntsuas siab

Teem lub siab tuav rau 50% -70% ntawm kev txhaj tshuaj, txo lub sij hawm los ntawm 20% -30%, thiab txiav txim siab cov khoom zoo yam tsis muaj qhov shrinkage.

(5) Ua kom muaj zog clamping

Yog tias lub zog clamping tsis txaus, nce 5% -10%, tab sis tsis siab dhau (kom tsis txhob muaj kev puas tsuaj rau cov pwm thiab khoom siv); yog tias tsis muaj txiaj ntsig, xyuas cov pwm lossis lwm yam tsis zoo.

2.2 Cov kauj ruam thib ob: Tshawb xyuas thiab kho cov pwm

Yog tias qhov kev hloov kho tsis zoo, ua tib zoo saib xyuas cov ntsiab lus hauv qab no:

(1) Ntxuav thiab kho qhov chaw seem

Tshem tawm cov seem thiab cov roj stains ntawm qhov chaw sib cais, txhuam thiab kho cov khawb thiab kev nyuaj siab, xyuas kom qhov sib txawv tsawg dua lossis sib npaug ntawm 0.01mm; kho qhov parallelism ntawm tus qauv kom ntseeg tau tias kaw tsis sib xws.

(2) Optimize lub tso tawm qauv

Tshem tawm cov qhov tso pa tawm, ua kom cov qhov tso pa tawm mus rau 0.02-0.05mm (hloov raws li cov dej ntws), thiab ntxiv cov qhov tso pa tawm ntawm qhov kawg filling point ntawm cov yaj.

(3) Kho cov khoom hnav

Hloov lossis kho cov sliders, pins, cov kab lus qhia thiab cov lus qhia kom paub meej tias qhov sib txawv ntawm qhov sib txawv yog 0.01-0.02mm, thiab tus pin thiab pwm qhov zoo sib xws.

(4) Optimize lub rooj vag tsim

Txav lub rooj vag mus rau qhov tuab -cov khoom siv phab ntsa, kom txo tau lub rooj vag txoj kab uas hla (10%-20%), thiab txo qis hauv zos.

2.3 Kauj Ruam thib peb: Tshawb xyuas thiab kho cov khoom siv raw

Yog tias tsis muaj qhov txawv txav hauv cov txheej txheem thiab pwm, tsom mus rau kev kho cov khoom siv raw: hloov siab -cov ntaub ntawv viscosity los yog ntxiv cov fillers los tswj cov kua dej; qhuav hygroscopic plastics kom cov dej noo tsawg dua lossis sib npaug li 0.2%; tshuaj ntsuam cov ntaub ntawv raw kom tshem tawm impurities.

2.4 Theem plaub: Xyuas cov khoom siv raws li txoj cai

Txheeb xyuas qhov ntsuas qhov ntsuas thiab qhov kev txhaj tshuaj tsis raug, kho qhov sib luag ntawm cov qauv, xyuas kom ruaj khov clamping quab yuam, txhaj tshuaj siab, thiab cov pwm pwm kev ntxhov siab.

III. Kev ceev faj tseem ceeb

Ib qho - hloov pauv hloov pauv:Kho tsuas yog ib qho parameter txhua zaus, ua qhov kev soj ntsuam kev tsim khoom, thiab tsis txhob nrhiav tsis tau qhov teeb meem tseem ceeb;

Balance defect:Muab rau hauv tus account ob qho tib si burring thiab cov khoom tsis txaus, shrinkage kab noj hniav, kom tsis txhob muaj teeb meem tshiab;

Ntev - tiv thaiv lub sij hawm:Sau cov txheej txheem thiab pwm pwm, tsim kom muaj ib daim ntawv teev npe, thiab tiv thaiv kom tsis txhob muaj teeb meem tshwm sim;

Kev ua haujlwm nyab xeeb:Tua lub hwj chim thaum kho cov pwm, thiab siv kev tiv thaiv thaum polishing thiab kho.