Reaction Injection Moulding is a new process for hand-model processing applied to rapid production.

After mixing the two-component polyurethane material, it is injected into the rapid mold under normal temperature and low pressure environment, and the chemical and physical processes such as polymerization, cross-linking and curing of the material are carried out.

form an article. It has the advantages of high efficiency, short production cycle, simple process and low cost.

It is suitable for small batch model samples in the product development process, as well as the production of small-scale production of covers with simpler structures and large-scale thick-walled and non-uniform wall-thickness products

Produce. Mainly used in medical, industrial products, chassis, cabinets, trolleys, countertops, auto parts, auto refit market, chemical containers, beauty, sports and leisure equipment, etc.

, large and medium-sized plastic shell. (It is especially suitable for the production of small batches of samples with an annual output of dozens, hundreds, and thousands)

This process can be simplified as: storage -> metering -> mixing -> mold filling -> curing -> demoulding -> post-treatment; the monomer or prepolymer is injected in a liquid state by a metering pump in a certain proportion

into the mixing head for mixing. After the mixture is injected into the mold, it reacts rapidly in the mold and is cured by cross-linking. After demolding, it is a RIM product.

Advantages of RIM low pressure perfusion process
1. It has the advantages of high efficiency, short production cycle, simple process and low cost, and can be made into parts with different density, hardness and elasticity
2. Compared with the VCM vacuum injection molding process, the size of the molded product is larger, which is suitable for molding products with large wall thickness and no sink marks on the surface.
3. The packaging effect of the molded product is good, which can meet the needs of appearance design verification, structural testing, etc.
4. Compared with the traditional mold process and process, the cost and cycle are greatly reduced

Pouring sample thickness: the best pouring thickness is 4~6mm, the maximum pouring thickness is 10mm
Injection pressure: about 10MPa. Flow control: 600g/s
General working time: 15-30 minutes per piece, the demolding temperature can be controlled below 40℃, and the parts are cured at 80℃ for 2-4 hours after demolding for best performance
Standard copy accuracy: ±0.20mm/100mm