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Rapid Reaction Injection Molding (RIM) Service

>Material of the RIM molds

ABS molds (≥ 100 PCS)

Resin molds (≥300 pieces)

Aluminum alloy molds (≥1,000 pieces)

>Pouring material

HD-PU4210

DCP-RIM

AXSON-RIM 875/900

HEI-CAST8636

PELNOC MU-30

>Standard copy accuracy

±0.20mm/100mm

>Pouring sample thickness

3-20mm

>The largest casting workpiece

2000mmX1200mmX1000mm

Reaction Injection Molding is a rapid tooling process which it mixes two-component polyurethane materials and inject them into rapid molds under normal temperature and low pressure environment, and form products through chemical and physical processes such as polymerization, crosslinking, and curing of materials. In comparison to other production processes, such as injection molding, Reaction Injection Molding requires much lower temperatures and pressures.

At Alpha-Mold, we specialize in creating molds of all sizes, tailored to a wide range of applications, with production quantities ranging from 30 to 1,000 pieces. Our RIM technicians offer expert technical advice and customized solutions to meet each client's specific project requirements. We produce large RIM parts with wall thicknesses between 3 to 6 mm, delivering exceptional rigidity and high strength. Despite the thin walls, the material's edges are engineered to provide outstanding stability and durability. Our streamlined RIM mold design and mold-making services can be completed within 2 weeks or less, depending on the project's size and complexity.

If you’re considering Reaction Injection Molding (RIM) for your project, Alpha-Mold is here to help. Our extensive experience and deep understanding of RIM enable us to produce large, complex, and high-value parts in medical equipment, automotive refitting, electrical encapsulations, consumer electronics, and aerospace.

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The benefits of Reaction Injection Molding

Low Tooling Costs

One of the key advantages of Reaction Injection Molding (RIM) is its low tooling costs. Unlike traditional molding methods that require expensive steel tools, RIM can utilize tools made from resin or aluminum due to the lower temperatures and pressures involved in the process. Aluminum tools are not only more affordable to produce but also easier to modify, making them ideal for applications with smaller production volumes. This is particularly beneficial in industries like medical devices, where production quantities often range from a few hundred to a few thousand units per year. As a result, the medical sector frequently relies on RIM for manufacturing high-quality, cost-effective parts.

Cost-Effective Production of Larger Parts

RIM is also well-suited for producing larger parts economically. Since RIM tooling can be made from cost-effective resin or aluminum, manufacturers can create larger molds without the exorbitant costs associated with traditional steel tooling. Producing large parts with steel molds can be prohibitively expensive, often costing hundreds of thousands of dollars. In contrast, RIM tooling represents a small fraction of that cost, making it a more economical choice for producing larger parts, especially in lower production volumes.

Complex Part Geometries

RIM excels in creating parts with complex geometries, which is particularly valuable in the production of medical devices. The process offers a high degree of design flexibility, allowing for the creation of parts with varying wall thicknesses, curves, and encapsulated components. The low viscosity of RIM materials ensures that even the most detailed molds are fully filled, enabling the efficient and cost-effective production of intricate parts. This capability makes RIM a preferred method for manufacturing complex components in medical devices and laboratory equipment, etc.

Sturdy Parts for Medical Devices

Reaction injection molded components are known for their exceptional strength and durability. They are dimensionally stable, physically robust, and resistant to wear and tear, making them ideal for medical equipment that must endure extensive use and provide reliable performance. Additionally, these components are chemically resistant, which is crucial for medical devices that require frequent cleaning and sterilization with strong disinfectants. The ability of RIM parts to withstand harsh chemicals without damage ensures that medical devices maintain their integrity and function over time.

Fewer Parting Lines

Another significant advantage of RIM is its ability to reduce the number of parting lines on a part. By allowing manufacturers to encapsulate items directly into a part and produce larger, more complex components, RIM minimizes the need for multiple separate pieces. This reduction in parting lines not only enhances the part’s structural integrity by eliminating weak points but also improves its appearance by reducing visible seams that can collect dust and detract from the overall aesthetic.

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