One: RIM Principle RIM Principle RIM (Reaction Injection Molding), commonly known in Chinese as reaction injection molding, the principle is as follows: two liquid raw materials after quantitative, proportional mixing injected into the mold cavity, exothermic chemical reaction, curing and forming a polymer in the mold. Curing in the mold to form a polymer. RIM (Reaction Injection Molding) is the process by which molded PU (Polyurethane) parts are made. In the process, 2 liquid components are mixed and injected into the mold where they chemically react to form a polymer. In the process, 2 liquid components are mixed and injected into the mold where they chemically react and cure,which forms the polyurethane polymer parts.
Two: RIM Process Advantages Advantages
1, Greatly reduce molding cost and cycle time (Low cost and cycle time). Cost and cycle time (Low cost and short lead time tooling)
-----RIM mold material can be aluminum or epoxy resin -----RIM mold material can be aluminum or epoxy resin
-----Mold cost and processing cycle time is just injection molds. The lead time is a fraction of injection mold -----The cost and the lead time is a fraction of injection mold
2, product design flexibility, simplify the product structure, reduce the design cycle (Design freely and shorten design cycle
-----External structure and internal structure can be produced as a whole, the same part can have different wall thicknesses, and the wall thickness changes in a wide range;
3, suitable for small volume production and R & D phase of product production ( Excellent choice for low volume and testing phase)
-----RIM process is suitable for the annual demand for 100-5000 sets of products, is the first choice for large small batch or R & D phase process. -----RIM is the excellent chioce for demands in 100-5000 Pcs per year.
4, suitable for molding large wall thickness products without sink or distortion
-----RIM process of low pressure The low-pressure injectability of the RIM process and the low shrinkage of PU make it almost without sink or distortion when molding large wall-thickness products, and after surface spraying and other treatments, it can meet the strict requirements of customers.
-----No sink generated thanks to very low molding pressures and shrinkage.
5, can produce parts with different density,rigidity and elasticity (Can produce parts with different density,rigidity and elasticity)
-----PU raw materials can be formulated to mold rigid, semi-rigid, self-crusting foam, high resilience, slow resilience and other hardness, density and elasticity of different products to meet a variety of different needs.
-----PU molded parts can be rigid and solid like an injection molded ABS or they can be a structural foam or elastomeric like rubber,which were widely used in medical,automible,lab analysis equipment,sport and recreation,industrial equipment etc.
6, encapsulation effect is good (Superb encapsulation ability thanks to low molding pressure)
----- many kinds of embedded parts can be put into the mold before injecting RIM material, so that in the molding process RIM material will complete the embedded parts of the encapsulation, structural frames, electronics, magnets, batteries, antennas, etc. can be encapsulated with RIM process, thus reducing the number of secondary processing, or even eliminating the link. Even eliminate the secondary processing link, reduce the assembly labor time.
-----Components to be encapsulated are fully or partially surrounded by the molded part which provides for the structural and cosmetic properties of the finished unit. Components to be encapsulated are fully or partially surrounded by the molded part which provides for the structural and cosmetic properties of the finished unit. Reinforcements, electronic components, magnets, batteries or antennas etc can be molded right into the RIM part. This can reduce your assembly times and costs, make assemblies tamper-proof or solve sealing problems for you.
7, PU products of a wide range of physical properties (Many physical properties)
7, PU products of a wide range of physical properties (Many physical properties)
-----PU polyurethane has high intensity, impact resistance, abrasion resistance, low temperature resistance and oil resistance, chemical resistance, etc. It is widely used in automobile and its modification market, medical equipment, instrumentation, electronics, sports and leisure, industrial and commercial equipment and other fields. -----PU has high intensity, very good impact resistance, outstanding abrasion resistance, low temperature resistance, chemical resistance, and so on. PU possesses many physical, mechanical and environmental properties which are advantageous in many applications such as automobile and its repacking market, medical equipment, electronics, sports and commercial equipment. PU possesses many physical, mechanical and environmental properties which are advantageous in many applications such as automobile and its repacking, medical equipment, electronics, sports and recreation, industrial and commercial equipment etc
.