Reaction Injection Moulding
Reaction Injection Moulding (RIM) systems makes possible to manufacture of large area products without the need for high-cost tooling and moulding equipment. Total investment costs of the entire manufacturing equipment are substantially lower than those of the conventional systems while products larger and more intricate in shape can be manufactured. Thus the manufacture of large area components can be economical even at small series of about 500 units per year. For medium production series, i.e. tens of thousands of units per annum, the competitiveness of this process is the highest of all.
| Typical materials used: |
| PA-RIM (NYRIM), PDCPD-RIM (Telene), PU-RIM (compact systems, integral foams). The RIM can be used to process both unfilled (RIM) and filled (RRIM, SRIM) systems. |
| Advantages: |
- Definite advantage for small to medium series (depending also on part size) - Low labor and investment costs (tools) - Short lead time - Design freedom - Large to very large parts from 0,5 to 100 kg and much more (standardly 0,5 to 18 kg) - Defined variable wall thickness - High quality level of surface - Possibility to overmold inserts - Easy fixation or assembling solution - Flexible production - Virtually stress free products |
| Main uses: |
| Large-area plastic components manufactured in medium and small series, engineering components intricate in shape and subjected to extreme loads, thick-walled technical products, rigid integral foam products. |
| Capacity of container: |
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| Main markets: |
| Painted exterior body parts for passenger cars, heavy and light commercial vehicles, buses and other vehicles (tractors, lawn movers, loaders, excavators, compaction equipment). | |
Process description
The RIM process consists in injection of a monomer mixture (a final compound containing all additives) directly into a production mould where the compound polymerizes under specific conditions. After termination of the polymerization process the finished product is demoulded (taken out of the mould). Since a monomer (not polymer) is injected into the mould, there are virtually neither internal stresses nor “weld marks” (weld lines) in the products.