RTM Technology
RTM Technology
Resin transfer molding is a closed-mold process utilizing matched male and female molds. Molds for RTM processes can be made out of a variety of materials, including steel, aluminum, nickel or composite.
RTM Technology
Resin transfer molding is a closed-mold process utilizing matched male and female molds. Molds for RTM processes can be made out of a variety of materials, including steel, aluminum, nickel or composite.
LRTM is a closed mould process. The LRTM mould consists of a rigid “A” side mould (base mould) and a lightweight semi-flexible “B” side mould (counter mould) that is sealed to the “A” side mould using vacuum pressure.
Resin is drawn into the resulting cavity under vacuum. The resin infusion may be assisted by a resin injection pump, which will accelerate the infusion process. Once an “A” side mould is cured, the “B” side mould is removed and the part is demoulded from the “A” side mould.
Once the glass reinforcement is fully saturated or “wet out,” the laminate is compacted with specially designed rollers and brushes to remove air bubbles and distribute the resin evenly. Multiple layers, or plies, of laminate are built up in sequence, often with a core material in the middle, to reac h the desired thickness. Various inserts, ribs, fasteners, or other items can be incorporated in the moulded part. Following a curing cycle, the part is de-moulded and trimmed as required.
LRTM production is more efficient than most other processes. You can use a single “B” mould in conjunction with multiple base moulds to achieve production rates of up to three moulded parts per hour. In this case there are three “A” moulds, which move from the mould prep area through the production cycle, while the “B” mould remains in a fixed location.
Its Process mainly include:
1. CREATING THE PREFORM
2. PREFORM LAYUP
3. CLOSING MOLD
4. INJECTION PHASE
5. CURING PHASE
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