What is LRTM?
LRTM (Light Resin Transfer Molding) is a closed-mold liquid composite molding process and a cost-effective, lightweight variation of RTM (Resin Transfer Molding).LRTM is widely used for composite components such as wind turbine nacelle covers, marine structures, and large composite shells. It is particularly well suited for manufacturers looking to transition from open-mold hand lay-up to closed-mold production, offering improved process control, product consistency, and manufacturing efficiency.
What Can Shuangyi Manufacture Using LRTM?
Shuangyi Technology primarily applies LRTM to the manufacturing of composite components such as nacelle covers, vehicle components, battery enclosure upper covers, and recreational water slides.
The process is particularly suitable for relatively small and medium-sized composite components. LRTM enables high-quality surface finishes while delivering products with a combination of low weight, high strength, and excellent corrosion resistance.
Representative LRTM Products?
Representative LRTM products include wind turbine nacelle cover components, recreational water slides, and engine hoods and other components for off-highway vehicles.
Compared with wind turbine blade molds, these components are relatively small in size, while offering high-quality, high-gloss surface finishes.
LRTM Manufacturing Capabilities?
Shuangyi Technology has a professional R&D team of more than 200 engineers and approximately 2,000 production personnel. With extensive experience in product design, engineering development, and composite manufacturing, we have successfully delivered customized composite components in volume for leading off-highway equipment manufacturers, including Caterpillar and Volvo.
Our integrated engineering and manufacturing capabilities enable us to support customers from product development and prototyping through to series production and volume delivery.
When Is LRTM Suitable?
LRTM has a broad range of applications, including wind turbine nacelle cover components, interior and exterior components for off-highway vehicles, and recreational water slides.
LRTM-produced components offer low weight, high strength, high-quality surface finishes, and relatively fast molding cycles. The process is particularly well suited for medium- to high-volume production of composite components, where consistent quality and efficient closed-mold manufacturing are required.
LRTM Applications
From Design to Production
Our engineering team begins each project by gaining a clear understanding of the customer's technical requirements, application conditions, and production objectives. Based on these requirements, we develop and review the product drawings and engineering design, while working closely with the customer to confirm key specifications and details.
The project then moves into first-article production, where the initial part is manufactured and evaluated against the agreed requirements. This stage provides an opportunity to verify the design, manufacturing process, dimensions, and overall product performance before proceeding further.
Once the first article is approved, we move to pilot production, producing a small batch of parts for further validation. Adjustments and refinements can be made during both the first-article and pilot-production stages based on customer feedback and actual production results.
After the product and process have been fully reviewed and approved, the project proceeds to full-scale production. This structured approach helps ensure that the final product meets the customer's requirements before entering volume manufacturing.
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Choosing the Right Composite Manufacturing Process
The appropriate composite manufacturing process depends on component geometry, size, structural requirements, production volume, material system, tooling requirements, and target cost. Shuangyi Technology can evaluate these factors and recommend a suitable manufacturing process during the engineering development stage.
Quality Assurance&Testing
Shuangyi Technology has dedicated quality assurance and inspection teams in addition to its professional engineering, R&D, and manufacturing teams. Our quality control process begins with the inspection of incoming raw materials, with key material properties and parameters, including glass transition temperature (Tg), verified according to applicable specifications and quality requirements.
For tooling and composite products, we use professional inspection and measurement equipment, including laser trackers, to accurately verify mold surfaces, dimensional accuracy, and critical geometric features.
Our quality organization includes approximately 100 dedicated quality professionals, with several team members holding professional APQP4Wind qualifications. Our quality engineers are experienced in applying internationally recognized quality management methodologies, including APQP, PDCA, and 8D problem-solving.
By applying structured quality processes and industry-recognized quality management methods throughout the product lifecycle, Shuangyi Technology maintains a consistent quality language and technical communication framework with global customers, supporting efficient collaboration from product development through manufacturing and final inspection.
Talk to Our Engineers
Our professional engineers have extensive experience managing composite development projects and leading engineering teams. If you have a custom composite design, engineering, or product development project, our experienced engineering team is ready to work with you to understand your requirements and develop the right solution.
Contact our engineering team:
Tec@shuangyitec.com