reyaksyon Piki

Ki sa ki se RIM

RIM se yon fason pwosesis nouvo pou pwodwi gwo gwosè ak pwodwi kantite gwo byen vit. RIM pwosesis ki se monome oswa pre-polymère (PU materyèl) nan eta likid ak yon pwopòsyon sèten ki mezire pa mesure ponp melanje a nan melanje tèt nan yon mwazi. Apre dwe melanj lan sou fòm piki nan mwazi an anba yon anviwònman ki ba tanperati presyon / chanm, li pral repons rapid ak kwa-ki lye ak geri. Apre dis plis minit, li pral solidifye, ak Lè sa lage l 'soti nan mwazi an, yon pati ki se RIM pwodwi. Ka pwosesis sa a dwe senplifye tankou: depo, mezi, ibrid, mwazi ranpli ak geri, demould ak pòs-pwosesis.

Pwosesis la nan reyaksyon Piki Par

1) Depo
De anvan tout koreksyon materyèl likid itilize nan pwosesis la RIM te ki estoke nan de rezèvwa nan tanperati sèten, rezèvwa se souvan veso presyon. Nan bòdi, stoste anjeneral nan 0.2 ~ 0.3 MPA ba presyon nan rezèvwa a, ak sikile toujou ap nan rezèvwa a, echanjeur chalè ak melanje tèt yo. Kòm pou an poliyiretàn, tanperati an mwayèn nan stoste se 20 ~ 40 ℃, presizyon nan kontwòl tanperati se ± 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 . 

Materyèl pou RIM

Jeneral résine komen: an poliyiretàn résine, vinil Estè, amid Estè résine, enstore résine, epoksidik résine ak materyèl konpoze tradisyonèl, elatriye 
Nòmalman materyèl: HD-PU4210, dkp-RIM, AXSON-RIM 875, elatriye.

PS: Lè a geri a RIM pwosesis ki se sitou nan fòmilasyon bòdi materyèl ak gwosè pwodwi desizyon an. Anplis de sa, pwodwi RIM bezwen ale sou geri a dezyèm apre yo fin lage soti nan mwazi an. Antan RIM pwosesis se vit (15-30 minit / piece) ak-wo presizyon, li anfòm yo pwodwi gwo kantite ak pwodwi gwosè gwo, ak gwosè a nan pi gwo pati Distribisyon se 2000mmX1200mmX1000mm, pou 10kg.

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