Liquid injection molding
From Plastics Wiki, free encyclopedia
Liquid injection molding (LIM) Process that involves an integrated system for proportioning, mixing, and dispensing dual-component liquid resin formulations and directly injecting the resultant mix into a mold which is clamped under pressure.
Process
During LIM, pumping systems deliver a two-part liquid silicone (catalyst and crosslinker) directly into a mixer for homogenization. Using a relatively low pressure, the mix is then injected directly into heated mold cavities in as little as 3 to 10 seconds. Molding and vulcanization (curing) occur inside the mold cavities within 10 to 90 seconds due to the high mold temperature. This all takes place within a completely closed system, which helps assure cleanliness.
Advantages and benefits
- Cleanliness with minimized contamination risk
- No material preparation labor
- Lower injection pressure
- Faster cycle rates
- Consistent part quality
Process: Injection molding cycle Reaction injection molding, Reinforced reaction injection molding, Liquid injection molding, Gas-assist injection molding, Coinjection molding, 2-shot injection molding, Fusible core injection molding, Rapid injection molding, Micro injection molding
Equipment: Injection molding machine(Vertical, Horizontal), Injection molding press, Injection mold (Hot runner, Cold runner), Injection unit (Injection ram, Injection screw), Clamping unit (Toggle , Hydraulic, Hydromechanical), Plunger injection molding, Injection molding machine manufacturers, Types of injection molding machines
Terms: Injection pressure, Injection rate, Clamping pressure
See also: Plastic thermoforming • Blow molding • Plastic welding • Plastic extrusion • Rotational molding
