BMC Kev Txhaj Tshuaj Molding

BMC yog cov ntawv luv ntawm iav fiber reinforced unsaturated polyester thermosetting plastics, uas yog cov khoom siv dav tshaj plaws ntawm cov khoom siv thermosetting yas.

 

(1) Cov yam ntxwv thiab kev siv ntawm BMC

BMC muaj lub cev zoo, hluav taws xob thiab cov khoom siv hluav taws xob, yog li nws tau siv dav, xws li ua cov khoom siv kho tshuab xws li cov khoom siv hauv lub cev, cov kav dej, lub hau npog, lub pob, thiab lwm yam.; Nws kuj tau siv dav hauv aviation, architecture, rooj tog thiab lwm yam uas yuav tsum tau muaj av qeeg-resistant, nplaim-retardant, zoo nkauj thiab ruaj khov; Nyob rau hauv nws cov tsoos hluav taws xob teb, nws siv kuj yog ntau thiab ntau dua.

 

(2) BMC cov khoom siv txhaj tshuaj molding

Hauv BMC, vim qhov sib ntxiv ntawm cov iav fiber ntau, cov cuab yeej siv yog qhov txawv me ntsis ntawm cov khoom siv thermoset txhaj tshuaj molding li niaj zaus, thiab lub tshuab txhaj tshuaj molding siv, ob hom plunger thiab hom ntsia hlau.

1) Pub system. Txawm hais tias nws yog hom ntsia hlau lossis hom plunger, ib qho khoom noj extrusion yuav tsum tau muab txuas los quab yuam cov khoom rau hauv lub thoob, thiab cov khoom noj khoom haus feem ntau yog siv plunger hom pressurized pub.

2) Txhaj tshuaj molding system. Vim tias qhov ntim ntawm lub plunger txhaj tshuaj molding tshuab yog qhov tseeb thiab tsis tu ncua, yog li cov iav fiber ntau tau tawg mus rau hauv cov yaj uas muaj kev puas tsuaj tsawg, yog li ntawd, lub tshuab plunger txhaj tshuaj molding tshuab siv ntau dua, tab sis cov pa tawm tsis yooj yim.

3) Cua sov system. Hauv BMC kev txhaj tshuaj molding, nws yog ib qho tseem ceeb uas yuav tsum tau tswj lub chim kub thiab muaj kev tswj xyuas qhov kub thiab txias kom ntseeg tau tias qhov kub ntawm qhov seem them rau lub nozzle yog qhov zoo. Tam sim no, cov dej kub tsis tu ncua lossis cov roj kub tsis tu ncua feem ntau yog siv rau cua sov. Hluav taws xob cua sov kuj muaj.

4) Pwm clamping ntaus ntawv. Muaj ntau cov khoom siv clamping xws li tshuab, hydraulic thiab tag nrho hydraulic feem ntau yog siv.

5) Pwm. BMC txhaj tshuaj pwm txawv me ntsis ntawm cov thermoplastic li niaj zaus, thermoset txhaj pwm, feem ntau vim tias BMC muaj qhov qis qis, yog li yuav tsum muaj qee qhov kev hloov pauv thaum tsim pwm kab noj hniav loj.

 

(3) BMC txoj kev txhaj tshuaj molding

1) Qhov kub thiab txias pwm. Thaum lub sij hawm ua, BMC yuav tsum tau tswj kom muaj qhov qis-viscosity txaus dynamic rau lub sij hawm ntev ntawm lub thoob qhov kub thiab txias, thiab qhov kub ntawm lub thoob yuav tsum muaj peev xwm ua tau raws li qhov tsawg ntawm BMC. Lub chim kub feem ntau muab faib ua ob los yog peb theem ntawm kev tswj, nrog rau qhov kub thiab txias nyob ze ntawm lub hopper kawg thiab qhov kub siab dua nyob ze ntawm lub nozzle kawg. Feem ntau qhov txawv yog 20 ~ 60 degree, pwm

Qhov kub yog feem ntau tswj ntawm 135 ~ 185 degree.

2) Txhaj tshuaj. Vim tias qhov dej tsis zoo, kev kho sai sai thiab cov qauv pwm ntawm BMC, nws raug nquahu kom xaiv qhov siab dua rau kev txhaj tshuaj siab, feem ntau 80 ~ 160MPa.

3) Kev txhaj tshuaj nrawm. Qhov nce hauv kev txhaj tshuaj nrawm yuav pab txhim kho qhov zoo ntawm cov khoom yas thiab txo lub sijhawm kho, tab sis nws tsis yog qhov tsim nyog rau kev tawm dag zog thiab ua kom cov kev taw qhia ntawm cov iav fiber ntau. Yog li ntawd, kev txhaj tshuaj qis dua yuav tsum tau siv rau ntawm qhov chaw ua kom ntseeg tau qhov zoo ntawm cov khoom yas, feem ntau 1.8 ~ 3.5m / min.

4) Screw ceev thiab rov qab siab. Yog tias siv cov ntsia hlau txhaj tshuaj molding tshuab, thaum txhaj BMC, kev puas tsuaj ntawm cov ntsia hlau rau cov iav fiber ntau dua, txhawm rau txo qhov kev puas tsuaj ntawm cov iav fiber ntau, cov ntsia hlau ceev yuav tsum tau xaiv ntawm tus nqi qis, feem ntau 2{ {6}}~ 50r/min. Raws li cov viscosity ntawm BMC, nws yog ib qho tsim nyog yuav tsum siv lub siab rov qab, uas feem ntau yog 1.4 ~ 2.0MPa.

5) Lub voj voog molding. Vim tias qhov sib txawv ntawm qhov loj thiab qhov nyuaj ntawm cov khoom yas, lub sijhawm txheej txheem ntawm txhua ntu kuj txawv, lub sijhawm txhaj tshuaj yog 2 ~ 20s, thiab lub sijhawm tuav yog 10 ~ 20 (thickness).