Lightweight RTM Technology Exchange And Problem Analysis
Overview of RTM Process
Resin Transfer Molding (RTM) is to pre-lay the reinforcement material in the closed mold cavity, then inject the mixed resin into the mold cavity and soak the reinforcement material. This process can design the product thickness, add embedded parts, insert foam core, and the resin is cured and demolded at room temperature or heated, and a product with smooth surfaces on both sides is obtained.
Consider L-RTM First
- With the strengthening of environmental awareness, the increase in labor costs, the improvement of the operating environment, and the mechanization or semi-mechanization of FRP products should be considered first, and closed mold operation should be considered.
- The demand for FRP products, the structural conditions, and the size of the product area are not suitable for the molding process, so the L-RTM process will be selected.
- You can add a front mold or a heating system, and you can also design an assembly line and tooling.
4.– L-RTM Mold
The lightweight RTM mold consists of a positive mold, a back mold, a steel frame, a sealing strip, an injection port, and a quick clamp.
Lightweight RTM Mold
Lightweight RTM Production Steps
- Drawings or samples
- Processing model
- Positive mold production
- Cavity production and injection port design
- Back mold production
- Mold surface treatment
- Sample production
Lightweight RTM Related Materials
The above picture shows the raw materials of lightweight RTM. To make L-RTM molds, you must first select the mold materials. The material selection is not the same, it depends on the product structure and the life of the mold.
Lightweight RTM Positive Mold Production
Mold gel coat is very important, including hardness, brightness, toughness, pinholes, etc. If the mold gel coat is too hard, it is easy to crack and difficult to mold. The pinholes of the mold gel coat are related to the bubble removal and operation. A good mold gel coat must have all the advantages.
Lightweight RTM Mold Cavity Production
Cavity production, injection and extraction are based on product thickness structure, resin flow, mold positioning, etc.
Lightweight RTM Back Mold Production
L-RTM Mold Use
In the use of lightweight RTM, negative pressure belt resin can be used for product production. If you need to increase the production speed and density, you can also use equipment. The equipment needs pressure feedback for easy control.
L-RTM Product Demoulding
L-RTM products can be demoulded without difficulty. The product can be controlled by following the upper and lower molds.
L-RTM Products
For L-RTM products, if the product needs to be compatible, RTM has advantages over hand lay-up, but cannot compare with molding in terms of accuracy.
Problems with Lightweight RTM Products
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