Reaction Injection Molding (RIM)
Reaction Injection Molding (RIM) is a low molding pressure process for production of complex plastic parts directly from low viscosity monomers or oligomers. Two or more reactive streams A and B are combined by impingement mixing in a self -cleaning mix head (10 to 20 MPa) prior to enter the mold. Mold pressures are very low (less than 1 MPa). With this process parts can typically be demolded in less than one minute.
Reinforced Reaction Injection Molding (RRIM) process is a development of RIM in which common reinforcing agent such as milled fibers or mineral fillers are incorporated into the polymer to modify specific properties. Increasing the mechanical properties, reducing thermal expansion, improving sound absorption or flame retardancy are among the typical targets.
Infusion is a cost-effective method of manufacturing strong, high-quality composite parts (e.g. boat hulls, wind turbine blades, bridge beams and building cladding panels) in relatively low quantities.
In this process, a dry laminate fiber reinforcement is placed into a rigid or flexible mold, sealed using a special plastic film/bag, and placed under vacuum. Once all the air has been removed from the bag and the dry laminate is fully compressed, the resin is introduced, and flows through the dry laminate drawn by the vacuum pressure.
Benefits of Telene® for Infusion process
- Long injection path thanks to low viscosity
- Reduced gating points allows for fast cycle time and low consumable cost
- Higher mechanical properties due to hight fiber contents, limited porosity and absence of dry spot
Fast Resin Transfer Molding
The Fast Resin Transfer Molding (F-RTM) process is particularly suited to the rapid production of high-quality composite materials. The process combines features of resin transfer molding (RTM) and compression molding. The decrease of production cycle time compared to standard RTM is obtained by reducing resistance to resin flow in high fiber content reinforcing materials. The preform is packed into the mold cavity which is partially closed. The resin mixture is partially fed into the gap between the mold and preform. Then a compression stroke presses the resin through the preform (especially in the Z direction), completing the molding.
Benefits of Telene® for Fast Resin Transfer Molding
- Composite parts with high fiber volume fractions and high production rates
- Good surface quality
- Fast injection and infusion allow the use of fast curing resins
- Increase permeability of fiber preform due to open mold gap
- Almost no additional resin required to push trapped air out of the mold cavityty
Pultrusion is a continuous, automated, high-volume manufacturing process used to make parts with constant cross section. In pultrusion the dry reinforcement materials (e.g. roving, mat, or fabric) are positioned in a specific profile using preforming shapers or guides. The dry profile is pulled either through a resin bath and into a heated pultrusion die for curing or it enters directly into the pultrusion die which is divided into two zones (the matrix injection zone and the curing zone).
The pultruded part is then moved to the cutting and trimming station. The shape of the cross section of the die determines the shape of the composite. The puller provides the force for the movement of materials through the entire system.
Benefits of Telene® for the Pultrusion Process
- High productivity
- Continuous process and can be completely automated
- The process can produce a composite part with high reinforcement content
- High structural properties due to very straight fiber
- Good quality surface
- Suitable for making high-volume composite parts
- High material utilization (scrap rates are usually less than 5%)