Yuav ua li cas los daws qhov kev txhaj tshuaj molding parting nto burrs teeb meem

Txhaj tshuaj molding-parting nto burrs teeb meem thiab cuam tshuam ntawm kev txhaj tshuaj molding txheej txheem ntawm pob tshab ntawm PP khoom,koj puas paub yuav daws li cas?
Hnub no cia peb tham txog lawv.
1. Cov cuab yeej siv tshuab:
(1) The clamping force of the tshuab molding is insufficient. Thaum xaiv lub tshuab txhaj tshuaj molding, the rated clamping force of the machine must be higher than the tension formed by the longitudinal projected area of ​​the injection molded product during injection.Otherwise it will cause mold expansion and parting surface burrs.

(2) The mold clamping device is not well adjusted, the toggle mechanism is not straight, and the left and right or up and down molds are not balanced, and the parallelism of the mold cannot be achieved. The phenomenon that one side of the mold is tightly closed while the other side is not closely attached. , There will be parting surface burrs during injection. Rau

(3) The mold itself is not parallel well, or the installation is not parallel, or the template is not parallel, or the tension rod is unevenly distributed and deformed. These will cause the mold clamping to be not tight and the parting surface burrs will appear. Rau

(4) The non-return ring is severely worn; the spring nozzle spring fails; the barrel or screw is worn too much; the inlet cooling system fails to cause “bridging” phenomenon; the barrel set injection volume is insufficient, the cushion is too small, lwm yam. It may cause the parting surface burrs to appear repeatedly, and it must be repaired or replaced in time.

2. Mold aspect
Poor precision of mold parting surface. The poor flatness of the mold core causes gaps when the mold is closed, resulting in burrs on the parting surface. Rau

3. Txheej txheem
(1) The injection pressure is too high or the injection speed is too fast. Due to the high pressure and high speed, qhov qhib quab yuam ntawm pwm nce thiab ua rau flashing. Kev txhaj tshuaj nrawm thiab lub sijhawm txhaj tshuaj yuav tsum raug kho raws li qhov tuab ntawm cov khoom. Cov khoom nyias nyias yuav tsum tau ua kom tiav sai ntawm kev kub ceev, thiab tsis muaj kev txhaj tshuaj tom qab nws puv; cov khoom tuab yuav tsum tau ntim rau hauv qis qis. Rau

(2) Kev pub mis ntau dhau ua rau burrs ntawm qhov chaw sib cais. Nws yog ib qho tsim nyog yuav tsum tsis txhob txhaj tshuaj ntau dhau los txhawm rau tiv thaiv kev nyuaj siab, thiaj li tsis muaj kev nyuaj siab “puv”, tab sis qhov parting nto burrs yuav tshwm. Qhov xwm txheej no yuav tsum tau daws los ntawm kev ncua sijhawm txhaj tshuaj lossis tuav lub sijhawm. Rau

(3) Kub kub ntawm lub thoob thiab lub nozzle los yog pwm kub heev yuav txo tau cov viscosity ntawm cov yas thiab ua rau kom cov fluidity.which yuav ua rau burrs nyob rau hauv parting nto nyob rau hauv tus mob ntawm smoothly nkag mus rau hauv pwm..
4. Hais txog cov khoom siv raw
(1) Yog tias cov yas viscosity siab dhau lossis qis dhau, tej zaum yuav muaj parting nto burrs. Cov yas uas muaj viscosity tsawg, xws li nylon, polyethylene, polypropylene, lwm yam., yuav tsum ua kom lub zog clamping;

plastics uas muaj zog nqus dej los yog dej-sensitive plastics yuav txo tau cov viscosity ntws ntawm qhov kub thiab txias thiab ua rau kom muaj peev xwm ntawm parting nto burrs Rau cov yas no., lawv yuav tsum tau qhuav kom huv si; cov viscosity ntawm cov yas uas sib xyaw nrog cov khoom siv rov ua dua qub yuav txo qis, thiab yog tias tsim nyog, ntxiv cov khoom khaws cia. Yas

Yog hais tias lub viscosity ntawm cov khoom yog siab heev, kev khiav hauj lwm yuav nce, thiab ib tug loj rov qab siab yuav ua rau kom lub siab ntawm cov kab noj hniav, ua rau tsis txaus clamping quab yuam thiab ua parting nto burrs. Rau

(2) Qhov loj me me ntawm cov khoom siv yas tsis sib xws yuav ua rau tus nqi pub mis sib txawv, thiab parting nto burrs yuav tshwm.

Tus cawv ntawm txhaj tshuaj molding txheej txheem ntawm lub pob tshab ntawm PP khoom
Lub pob tshab ntawm pob tshab polypropylene cov khoom hloov kho nrog pob tshab nucleating tus neeg saib xyuas tsis yog tsuas yog cuam tshuam rau qhov zoo ntawm cov khoom. yas raw khoom nws tus kheej, tab sis kuj tseem cuam tshuam nrog kev xaiv ntawm kev txhaj tshuaj molding txheej txheem.

Nrhiav qhov zoo tshaj plaws txhaj tshuaj molding Cov xwm txheej rau cov khoom siv raw yog qhov tsim nyog rau kev ua kom pom qhov pom tseeb ntawm cov khoom siv raw thiab tau txais cov khoom zoo tshaj plaws pob tshab polypropylene. Qhov no muaj txiaj ntsig zoo rau cov tuam txhab khoom lag luam yas.

Kev cuam tshuam ntawm PP pob tshab:

(1) Qhov kub ntawm melting ntau dua, qhov siab dua qhov haze ntawm random copolymer polypropylene tsis muaj pob tshab nucleating tus neeg saib xyuas thiab qhov phem dua qhov pom.

(2) Kev cuam tshuam ntawm melting kub nyob rau hauv haze ntawm random copolymer polypropylene nrog ntau hom pob tshab nucleating agents muaj feem xyuam rau hom nucleating agents..

(3) Rau cov khoom uas muaj peev xwm ua kom pom cov nyhuv anti-reflection ntawm cov pob tshab nucleating tus neeg sawv cev ntawm qhov qis dua melting kub, lub haze yuav nce maj mam nrog qhov nce ntawm melting kub, tab sis qhov ntau ntawm kev hloov pauv ntau dua li qhov tsis yog-nucleating tus neeg sawv cev. Lub random copolymer polypropylene yog me dua.

(4) Qhov qis pwm kub, qhov qis dua qhov haze ntawm pob tshab polypropylene thiab qhov siab dua qhov transparency.

(5) Qhov kev txhaj tshuaj nrawm dua, qhov siab dua qhov haze ntawm cov pob tshab polypropylene thiab qhov qis dua qhov pom tseeb.

(6) Nrog rau ncua sij hawm tuav, qhov haze ntawm pob tshab polypropylene txo, thiab tom qab ncav cuag qhov txwv, nws tseem tsis hloov.

(7) Raws li tuav lub siab nce, qhov haze ntawm pob tshab polypropylene txo, tab sis yog tias tuav lub siab loj heev, cov khoom yuav muaj flash, thiab cov residual internal stress ntawm cov khoom yuav kuj loj.