Advantages and disadvantages of the RTM process
2024-03-20
The RTM (Resin Transfer Molding) process is a molding technology used to manufacture composite materials, which has the following advantages:
Dimensional stability and high precision. The RTM process can produce products with stable dimensions and high precision.
High utilization rate of raw materials. This process uses preforms, improves damage tolerance performance, and reduces raw material waste.
Cost-effective. The RTM process does not require the use of prepregs or autoclaving, simplifying the production process and therefore being less costly.
Environment friendly. The RTM process reduces the emission of volatile organic compounds (VOC) and contributes to environmental protection.
Suitable for a variety of applications. The RTM process is suitable for manufacturing high-quality, complex-shaped products, such as automotive, aerospace, and construction.
High fiber volume content. RTM process can make the fiber volume content reach 55% ~ 60%, improve the performance of the material.
In addition, the RTM process has the advantages of flexible mold design and diverse material selection. However, the RTM process also has some disadvantages:
High mold requirements. The sealing requirements of the closed mold are strict and the initial cost is high.
Void content issues. Before the resin injection, it is necessary to heat the voids.
Placement of preforms is difficult. The preform is difficult to accurately place into the mold and hold in place.
High production technology requirements. Process control is difficult, prone to surface defects such as pores and dry spots, affecting product quality.
Porosity problem. Problems with the direction of resin flow and the fiber impregnation process can lead to increased porosity, affecting article performance.
Dimensional accuracy control is difficult. A slight gap between the mold and the molded part may result in poor dimensional accuracy.
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