mmenyuko sindano

RIM ni

RIM ni mpya mchakato njia kwa ajili ya kuzalisha ukubwa kubwa na za kubwa kiasi kwa kasi. RIM mchakato ni monoma au kabla ya polymer (vifaa PU) katika hali ya kioevu na idadi fulani ambayo kipimo metering pampu kuchanganya katika kuchanganya mkuu wa mold. Baada mchanganyiko kuwa hudungwa katika mold chini ya chini ya mazingira ya shinikizo / chumba joto, itakuwa majibu ya haraka na msalaba-kuunganisha kuponya. Baada ya dakika kumi zaidi, itakuwa solidified, na kisha kutolewa kutoka mold, sehemu yaani RIM bidhaa. Mchakato huu unaweza kuwa rahisi kama: kuhifadhi, kipimo, mseto, mold kujaza na kutibu, demould na baada ya usindikaji.

mchakato wa Mmenyuko sindano ukingo

1) Uhifadhi
mbili ghafi maji nyenzo kutumika katika mchakato RIM walikuwa kuhifadhiwa katika mbili hifadhi katika joto fulani, hifadhi ni kawaida shinikizo chombo. Katika ukingo, stoste kawaida katika 0.2 ~ 0.3 MPA shinikizo katika hifadhi, na mzunguko mara kwa mara katika hifadhi, exchangers joto na kuchanganya kichwa. Kama kwa polyurethane, joto la wastani wa stoste ni 20 ~ 40 ℃, usahihi kudhibiti joto ni ± 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 . 

Vifaa kwa ajili ya RIM

General kawaida resin: resin polyurethane, vinyl ester, amide esta resin, resin isokefu, epoxy resin na jadi vifaa Composite, nk 
Kwa kawaida nyenzo: HD PU4210, DCP-RIM, AXSON-RIM 875, nk.

PS: wakati kuponya ya RIM mchakato ni hasa kwa molding vifaa uundaji na ukubwa wa bidhaa uamuzi. Aidha, RIM za haja ya kwenda kwenye kutibu pili baada ya kutolewa kutoka mold. Na kama RIM mchakato ni haraka (dakika 15-30 / kipande) na ya juu usahihi, ni fit kuzalisha kiasi kikubwa na bidhaa za kubwa ukubwa, na ukubwa wa kubwa kurusha sehemu ni 2000mmX1200mmX1000mm, kwa 10KG.

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