Cov tshuaj tiv thaiv Txhaj

Yuav ua li cas yog ntug

Ntug lauj kaub yog ib tug txheej txheem tshiab txoj kev rau cov loj loj thiab loj loj kom muaj nuj nqis cov khoom sai heev. Ntug lauj kaub txheej txheem yog monomer los yog pre-polymer (PU ntaub ntawv) nyob rau hauv kua hauv lub xeev nrog ib tug tej kev faib ua feem uas ntsuas los ntawm lub metering twj tso kua mis nws nyob rau hauv nws lub taub hau ntawm ib cov pwm. Tom qab lub sib tov yuav txhaj mus rau hauv lub puab nyob rau hauv ib tug tsis tshua muaj siab / sov li chav nyob ib puag ncig, nws yuav sai teb thiab tus ntoo khaub lig-txuas curing. Tom qab kaum feeb ntxiv, nws yuav tsum tau solidified, thiab ces tso nws los ntawm cov pwm, hais tias ib feem yog ntug khoom. Qhov no txoj kev muaj peev xwm yuav yooj yim zog li: cia, kev ntsuas, hybrid, pwm filling thiab curing, demould thiab post-ua.

Tus txheej txheem ntawm tshuaj tiv thaiv Txhaj Moulding

1) Cia
Ob nyoos kua cov ntaub ntawv uas siv nyob rau hauv lub ntug txheej txheem tau muab cia rau hauv ob reservoir ntawm tej kub, reservoir yog feem ntau siab txog ntsha. Nyob rau hauv molding, stoste feem ntau nyob rau hauv 0.2 ~ 0.3 MPa tsis tshua muaj siab nyob rau hauv lub reservoir, thiab circulating lossi nyob rau hauv lub reservoir, Thaum tshav kub kub exchangers thiab nws lub taub hau. Raws li rau polyurethane, qhov nruab nrab kub ntawm stoste yog 20 ~ 40 ℃, qhov kub thiab txias tswj cov neeg yog ± 1 ℃.
2)Measurement
Measurement will be finished by the metering pump , and requirements for measuring accuracy is at least be ± 1.5%, and the best control should at ± 1%.
3) Hybrid
In RIM process , product quality is largely depend on the quality of mixture in the mixing head , so does the production capacity . The normal pressure is about 10 Mpa in order to get the better effect .
4) Mold falling
The characteristic of RIM process is the material flow rate is very high .Then stoste’s viscosity can not be very high .Such as the viscosity of polyurethane mixture is about 0.1 Pa s.and flow rate control at 600 g/s in mold falling .
5) Curing.
Polyurethane two-component mixture have very high reactivity after injected in the mold ,so it complete curing in ten more minutes .But plastic’s conductivity is not good , so most heat can not release from a large chemical reaction condition , so that the outside temperature are higher than inside, so the curing development is from inside to outside .
6) Demold 
Demold also means we need release the cured part from the mold , and that part is the RIM product . And more quantity can be produced as the above process .
7) Post-Process 
It is according to customers’requirements . 

Khoom rau ntug

General ntau cob: polyurethane cob, yas ester, amide ester cob, unsaturated cob, epoxy cob thiab tsoos puas khoom, thiab lwm yam 
Feem ntau cov ntaub ntawv uas: HD-PU4210, DCP-ntug, AXSON-ntug 875, thiab lwm yam.

PS: Cov curing lub sij hawm ntawm ntug txheej txheem yog tsuas yog los ntawm cov molding material formulation thiab khoom loj kev txiav txim siab. Nyob rau hauv tas li ntawd, ntug khoom yuav tsum tau mus rau lub thib ob curing tom qab tso tawm los ntawm cov pwm. Thiab raws li ntug txheej txheem yog ceev (15-30 feeb / daim) thiab high-precision, nws haum rau tsim loj kom muaj nuj nqis thiab loj loj luaj li cas cov khoom, thiab qhov luaj li cas ntawm biggest casting ib feem yog 2000mmX1200mmX1000mm, rau 10KG.

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