PU Injection Molding
Services On Aria
High-quality, durable, and versatile parts tailored to your specific needs. Whether you’re prototyping or moving into full-scale production, our advanced manufacturing capabilities and rapid turnaround times ensure your projects stay on track.
Upload 3D CAD File to Start A New Injection Molding Quote
What is PU Plastic?
Polyurethane (PU) is a versatile polymer material that belongs to the family of thermosetting plastics and elastomers. It is widely used in various industries due to its exceptional properties, including flexibility, durability, and resistance to wear and tear.
PU can be tailored to meet specific application requirements by adjusting its formulation, making it suitable for a wide range of products.
Description
Full Name
Acrylonitrile Butadiene Styrene
Process
Finishing options
Mold texturing，Laser engraving，Electroplating, Bead Blasting
Applications
Impact-resistant applications, Appliances, Housings, Toys
Prices
$$
Features
Appearance
Red and Orange, Green and Blue
Strengths
Good Scratch Resistance, High Gloss, Strong toughness, Ease of processing
Tensile Strength
6,500-33,000 PSI
Elongation at Break
57%
Density
1.04~1.11 g/㎤
Why Choose PU Injection Molding?
Polyurethane is a highly adaptable material known for its exceptional properties, making it ideal for a wide range of applications. PU injection molding offers:
Durability
PU parts are resistant to wear, tear, and impact, ensuring long-lasting performance.
Flexibility
From rigid to soft elastomers, PU can be formulated to meet diverse mechanical and aesthetic requirements.
Chemical Resistance
PU withstands exposure to oils, solvents, and other chemicals, making it suitable for demanding environments.
Customization
With a variety of formulations, PU can be tailored for specific hardness, elasticity, and thermal properties.
Applications of PU Injection Molding
PU is widely used across industries for its versatility and performance. Common applications include:
PU Injection Molding Material Properties
PU Plastic Properties
Value
Flexural Modulus（GPa）
1.2-1.5
Maximum Service Temperature（℃）
180
Chemical Formula
C27H36N2O10
Glass Transition Temperature（℃）
180
Drying Temperature（℃）
80–120
Mold Temperature（℃）
45～80
Melt Temperature（℃）
150～245
Injection Pressure（MPa）
50～120
Injection Speed（ mm/sec）
50-200
Back Pressure（MPa）
９～18
Shrinkage
0.5% to 1.0%
PU Injection Molding Design Guide
Wall Thickness
- Uniform Wall Thickness: Maintain consistent wall thickness (typically 2mm to 6mm) to avoid warping, sink marks, or uneven curing.
- Avoid Thick Sections: Thick walls can lead to longer cycle times, shrinkage, and internal stresses. Use ribs or gussets for added strength instead.
Draft Angles
- Draft Angles: Include draft angles of 1° to 3° on vertical walls to facilitate part ejection and prevent damage to the mold or part.
Ribs and Bosses
- Draft Angles: Include draft angles of 1° to 3° on vertical walls to facilitate part ejection and prevent damage to the mold or part.
Rib Design
- Ribs: Use ribs to reinforce thin walls without increasing thickness. Keep rib thickness 50% to 60% of the adjacent wall thickness.
- Bosses: Design bosses with a wall thickness of 60% to 80% of the main wall and include draft angles for easy ejection.
Gate and Runner Design
- Gate Location: Place gates in areas that minimize flow resistance and avoid cosmetic surfaces.
- Runner Size: Use appropriately sized runners to ensure even material flow and reduce pressure loss.
Shrinkage Considerations
- Shrinkage Rate: Account for PU shrinkage, which typically ranges from 0.5% to 1.5%, depending on the formulation.
- Mold Compensation: Design the mold slightly larger to accommodate shrinkage and achieve the desired final dimensions.
Surface Finish
Custom parts for your aerospace projects now
All information and uploads are secure and confidential.
Related Post
What is melt index for injection molding?
Melt index is a number that indicates the fluidity of plastic materials during processing. It is the American Measurement Standards Institute (ASTM), according to the
The tensile strength of injection molding plastic
The injection molding process is a process involving mold design, mold manufacturing, raw material characteristics, and raw material pretreatment method, molding process, injection molding machine operation, and
Physical and mechanical properties of injection molded plastic
We use plastic almost every day, and many people use plastic to design products, but few of them have a thorough understanding of the characteristics