PU (Polyurethane) Injection Molding Service
We offer high-quality PU (Polyurethane) Injection Molding Service, tailored to your specific needs. Whether you are prototyping or going full production, our advanced manufacturing capabilities and rapid delivery cycles ensure the smooth progress of your project.
Custom Polyurethane (PU) Injection Molding Manufacturer
As a trusted manufacturer of custom polyurethane (PU) injection molding, Elimold combines advanced polyurethane injection molding technology and engineering expertise to deliver reliable, high-performance components. We offer significant advantages in design, flexibility, and cost-effectiveness, enabling a wider range of part sizes, unique designs, and overall excellence. Every member of the Elimold team is dedicated to ensuring the success of your part designs at every stage of the plastic injection molding process, providing comprehensive support for your projects, from part and design-to-manufacturing (DFM) to mold design, manufacturing, part production, finishing, painting, assembly, quality control, custom packaging, shipping, and exceptional customer service.
Complete Production Support Team
We have a dedicated manufacturing team working behind the scenes to meet your production order needs. We manage the entire process and keep you updated on the latest progress.
Engineering & DFM
Mold Making
Injection Molding
Surface Treatments
Quality and Compliance
Assembly and Shipping
Materials to Meet Your Application Needs
Our thermoset polyurethane products cover a wide range of performance properties. We can customize polyurethane formulations to meet the specific requirements of each project. Please tell us your custom polyurethane casting application needs, and we will provide you with the best material selection. Because the specific requirements of each custom molding order are different, we do not have standard stock sizes. Our production process sets a minimum order quantity based on part size and required material specifications.
What is Polyurethane (PU/PUR)?
Polyurethane (PU/PUR) is a flexible and elastic polymer whose organic units are linked by urethane bonds. Polyurethane is available in both ester and ether formulations. These formulations enhance the versatility of polyurethane and help control its stiffness, durability, and density in a variety of applications. Polyurethane (PU) is lightweight, has a long service life, and good elasticity. Furthermore, it offers advantages such as good shape stability, chemical resistance, and oil resistance. Polyurethane also exhibits good weather resistance, withstanding both low and high temperatures (including wind and UV radiation). It does not generate static electricity and possesses excellent thermal and acoustic insulation properties. The properties of this material can be tailored according to the intended use and the mixing method. Additionally, the manufacturing process employed also affects its properties.
Technical Specifications of PU Materials
Our material selection ensures reliable operation of polyurethane components in a wide range of applications:
- Hardness Range: Shore A 70-95
- Temperature Resistance: -40°C to 80°C (higher temperature ratings available).
- Abrasion Resistance: 3-5 times better than rubber.
- Chemical Resistance: Resistant to oils, fuels, solvents, and corrosion.
- Structural Properties: High rigidity and tensile strength, suitable for components subjected to significant external forces.
What is polyurethane injection molding?
Polyurethane injection molding involves injecting molten polyurethane material under high pressure into a precisely designed mold. This technology ensures that the material fills every detail of the mold cavity, allowing the molded part to be removed directly from the mold, achieving or near-perfecting its final shape. This high precision minimizes the need for secondary processing, simplifies the production process, and reduces costs.
Advantages of Polyurethane Injection Molding
Polyurethane is a highly adaptable material, renowned for its superior performance, making it ideal for a wide range of applications. Polyurethane injection molding offers the following advantages:
- Durability: PU parts are abrasion-resistant, tear-resistant, and impact-resistant, ensuring long-lasting performance.
- Flexibility: From rigid to flexible elastomers, PU can be formulated to meet a variety of mechanical and aesthetic requirements.
- Chemical Resistance: PU is resistant to oils, solvents, and other chemicals, making it suitable for harsh environments.
- Customization: Through a variety of formulations, PU can be customized to meet specific hardness, elasticity, and thermal properties.
Are You Looking for a Tailored Solution?
Contact us today to discuss your specific needs and learn how our customized PU injection molding solutions can improve your production processes. Don’t hesitate, let’s create excellence together.
A One-Stop PU (Polyurethane) Injection Molding Service Company
Our one-stop service ensures timely parts manufacturing, sourcing, packaging, and shipping, even in emergency situations. Whether it’s custom polyurethane injection molding design or reverse engineering, Elimold’s staff assists clients throughout the entire lifecycle, from customer needs and design, rapid prototyping, mold making to final production. We also offer suggestions for improved PU plastic parts design to facilitate assembly. No part design documents, only samples? No problem! Our team can reverse engineer the parts and provide suitable alternative designs.
Low-volume Production and Prototyping Services
Elimold offers readily available low-volume production and prototyping services to meet a wide range of unique project needs while optimizing production efficiency. This is particularly advantageous for industries requiring rapid turnaround and high customization. For low-volume production, we can even use 3D printing technology to create custom molds, enabling rapid prototyping and shortening delivery cycles. Leveraging this technological advantage, Elimold is able to offer a diverse range of custom-molded polyurethane products with unparalleled precision and quality.
PU Injection Molding Factory
All products are manufactured at our production base in Shenzhen, China. This facility covers over 150,000 square feet and is equipped with more than 130 injection molding machines of various types. As a recognized industry expert, we hold ISO9001 and 13485 certifications. Furthermore, we continuously invest in state-of-the-art polyurethane molding technology, and our highly skilled polyurethane technicians and management team are dedicated to maintaining a leading position in materials and processing technologies within the industry. Additionally, in our dedicated polyurethane workshop, we can also produce solid polyurethane parts using cast elastomer polyurethane.
Custom Polyurethane Parts Capability
Our polyurethane technology team can formulate the most suitable polyurethane system based on the application requirements and operating environment of the final part. Our systems cover MDI and TDI isocyanates, as well as polyesters and polyether polyols. We can process polyurethane materials with hardness ranging from 50 Shore A to 95 Shore D, and can specify colors upon customer request. Common colors include black, red, yellow, green, orange, and blue. The polyurethane materials we use in our casting and molding processes are sourced from leading suppliers in the industry and are tested and certified to the highest standards.
Polyurethane to Metal Bonding Solutions
Polyurethane materials are suitable for bonding to metals and a wide variety of other substrates, resulting in durable and reliable components. Bonding polyurethane to metal requires thorough cleaning of the metal surface to remove contaminants, creating a highly clean bonding area. Adhesive is then applied, allowing the polyurethane to chemically bond with the metal, forming an adhesive layer with strength matching that of the respective materials. This process improves the durability of the bonded components, making them suitable for harsh application environments.
Quality Assurance
We understand the paramount importance of providing products that meet the highest quality standards. Our final inspection process includes a comprehensive visual inspection of your product to confirm the absence of any defects or anomalies. Where necessary, we will employ advanced testing equipment and methods to verify the quality and performance of the product, ensuring it meets the required rigidity and flexibility standards. We maintain stringent quality control throughout the entire production process:
- Internal inspection and testing.
- Dimensional and hardness verification.
- Mold performance and adhesion testing.
- Compliance with customer and industry standards.
Why choose to partner with Elimold?
We specialize in producing custom polyurethane molded parts to meet the specific tolerances and physical requirements of your unique product applications. With decades of expertise, we offer a comprehensive range of high-performance polyurethane compounds that bond firmly to metals and other substrates. We maintain efficient communication throughout the production process, ensuring rapid delivery of the first sample and reliable delivery times once the project is approved for production. Partner with us to build a reliable, high-quality polyurethane parts supply chain, ensuring your business meets your customers’ production needs and performance expectations. Contact our experts today to start your custom polyurethane project.
RIM (Reaction Injection Molding) Technology Brings Greater Product Design Power and Flexibility
The RIM process enables design solutions that are impossible with other processes. It can manufacture PU parts of various sizes, from small to large, while ensuring structural integrity, strict tolerance control, and varying wall thicknesses within the same part. Furthermore, the RIM process supports overmolding, allowing multiple PU parts to be combined into a single unit. It enables the design of solid, elastomer, structural foam, or flexible foam components with precise properties such as impact resistance, dimensional stability, strength, abrasion and corrosion resistance, 94V-0 and HB ratings, thermal insulation, and more.
FAQ
While polyurethane systems are chemically neither identical to rubber nor plastic, they do belong to the advanced category of synthetic polymer materials. Generally, the difference between plastics and rubber lies in their elasticity: rubber is an elastic material that returns to its original shape after deformation; while plastic is an inelastic material that undergoes permanent deformation after stretching or impact.
We can produce bushings, rollers, liners, gaskets, shock absorbers, structural components, and more. This process can handle products with thin walls, internal grooves, and complex geometries.
Polyurethane can be divided into two main categories: polyester-based polyurethane (AU) and polyether-based polyurethane (EU). Polyester-based polyurethane is generally more durable, while polyether-based polyurethane has better water resistance and moisture resistance.
Yes, polyurethane decorative strips can be used outdoors. They have strong weather resistance, including weather resistance, ozone resistance, and temperature difference resistance.
Polyurethane moldings typically perform well in temperature ranges from -40°C to +90°C, and some formulations can even withstand short-term exposure to up to 120°C.
Yes, polyurethane is easily colored during the casting process. This allows for customization to meet specific aesthetic and functional requirements.
Yes, we can produce products in a variety of colors to meet your needs. The polyurethane colors we have processed include gray, red, blue, yellow, orange, green, white, and black.
Ready to Start a New Project?
Looking for a partner in polyurethane injection molding? Request a quote now to get high-performance polyurethane components tailored to your project.