The technology of RTM Moulds involves the injection of low-viscosity thermoset resin into a closed mould. Under moderate pressure, the resin flows through the mould, filling in the voids and wetting the whole surface of any reinforcing material. The reinforcement may be in the form of fibers, mats, or woven structures. The process has a broad range of applications and is particularly suitable for complex three-dimensional shapes. A variation of RTM is the VARTM technique, which uses a vacuum to enhance resin flow and reduce void formation. After the injection is complete, the part is typically heat-cured to complete the process.
RTM Molds are designed to produce parts with tight geometric tolerances and good surface finishes. The process is highly dependent on the geometry of the mould and the flow properties of the reinforcement. The position of the reinforcement and the inlet ports are critical to ensuring a high-quality manufactured part. Additionally, preform defects and variations in materials can affect the flow of the resin. For these reasons, it is crucial to use sensors to control resin flow front shapes.RTM Moulds are used for manufacturing fibre-glass parts. The advantages of this process include reduced cycle times, reproducibility at high volumes, and the ability to accommodate complex parts. The technology has also been used for aerospace components. Recently, advanced thermoplastic resins with higher use temperatures have been used. One such resin is AroCy L-10, a liquid monomeric dicyanate with a Tg of 259 degC. It has a low viscosity and has been used for aerospace applications.Another benefit of RTM Moulds is their ability to reduce clamping force. These moulds often incorporate temperature control and part ejectors. Using a temperature control system during the injection process allows for more precise control of the viscosity of the resin. The system also enables faster cycle times by ramping up the temperature after the injection phase.RTM Moulds are also available in custom-made designs. Custom-made moulds allow for more flexibility and can incorporate virtually any type of reinforcement or catalyst blend. Custom RTM moulds also require the creation of a core and cavity, which are critical components of the process. The tool used to manufacture the part is crucial to the quality of the resin transfer moulded part.Resin transfer moulding is a process of machining plastic parts. The process requires skilled mold makers and produces high-quality plastic parts. RTM moulds are usually a two-part design, with a male and female part. The preform is placed into the female mould, which is closed with mechanical force. The resin is then injected into the mold, which is usually pre-heated. Sometimes, the process of injection requires post-curing to ensure that the resin is fully cured.In the case of a closed RTM mould, the tool is made from metal. In this process, dry fibre preforms are inserted into the cavity of the mold before a liquid thermoset resin is injected. The resin is then cured using a vacuum. This process allows for complex cross-sectional area geometry to be fabricated.
