Core and Cavity for Injection Molding
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PA (Nylon) Injection Molding Service
Tough, custom PA parts delivered in as fast as 5 days. Expert support and flexible options to meet your needs, all at competitive prices.
PA (Nylon) in Injection Molding
PA (Nylon) is a highly versatile material used in injection molding due to its excellent mechanical properties, wear resistance, and chemical resistance. At RapidDirect, we offer a range of PA (Nylon) materials that are ideal for various applications:
PA (Nylon) Blue: Known for its good mechanical strength and fatigue resistance, making it suitable for structural components.
PA6 (Nylon) + GF15 Black: Reinforced with 15% glass fibers, offering enhanced stiffness and dimensional stability for more demanding applications.
PA6 (Nylon) + GF30 Black: Reinforced with 30% glass fibers, providing superior strength and rigidity, ideal for high-stress parts.
PA66 (Nylon) Beige (Natural): Offers high tensile strength and thermal stability, perfect for components exposed to high temperatures.
PA66 (Nylon) Black: Similar to the natural variant but with added UV resistance, making it suitable for outdoor applications.
| Price: | $$ | Available PA (Nylon) at RapidDirect: | PA(Nylon) Blue, PA6 (Nylon)+GF15 Black, PA6 (Nylon)+GF30 Black, PA66 (Nylon) Beige(Natural), PA66 (Nylon) Black |
|---|---|
| Lead Time: | < 5 days |
| Wall Thickness: | 1mm |
| Tolerances: | ISO2768-C |
| Max Part Size: | 300 mm x 300 mm x 300 mm |
Plastic PA (Nylon) Properties
| Properties | Value |
|---|---|
| Density | 1.14 g/cm³ (Nylon 6) |
| Tensile Strength | 45 to 80 MPa (Nylon 6) |
| Flexural Strength | 75 to 140 MPa (Nylon 6) |
| Impact Strength | Moderate to high |
| 0.25 W/(m·K) | 0.35-0.5 W/(m·K) |
| Melting Point | 220°C (Nylon 6) |
| Coefficient of Thermal Expansion | 80-100 x 10^-6 /°C |
| Moisture Absorption | High |
| Chemical Resistance | Good against hydrocarbons, alcohols, solvents |
| UV Resistance | Poor without additives |
Pros and Cons of PA (Nylon) Injection Molding
PA plastic offers many benefits that make it suitable for injection molding. However, there are some of its downsides to consider before choosing it for any project.
Pros
- Excellent mechanical properties, including high strength and stiffness.
- Good wear resistance and chemical resistance.
- Versatile for various applications and industries.
- Available in different grades to suit specific needs.
Cons
- High moisture absorption, requiring careful drying before processing.
- Potential for warpage if not properly processed.
- Poor UV resistance without additives.
- Higher cost for glass-fiber reinforced grades.
Applications of Injection Molded Nylon Parts
Injection molded PA (Nylon) parts are widely used across various industries, including:
- Automotive: Engine components, fuel system parts, and under-the-hood applications.
- Consumer Goods: Gears, fasteners, and structural components.
- Engineering: Bearings, bushings, and industrial machinery parts.
- Medical: Surgical instruments, housings, and components for medical devices.
FAQs
Common grades of PA (Nylon) used for injection molding include Nylon 6, Nylon 66, and glass-fiber reinforced nylons such as PA6 + GF15 and PA6 + GF30. Nylon 6 is known for its balance of strength, toughness, and flexibility, making it ideal for a variety of applications. Nylon 66 offers higher tensile strength and thermal stability, making it suitable for more demanding environments. Glass-fiber reinforced nylons provide enhanced stiffness and dimensional stability, which are essential for high-stress parts.
The typical wall thickness for PA (Nylon) injection molded parts ranges from 1.5mm to 3mm. Thinner walls can be achieved for specific applications, but they require careful control of the molding process to avoid defects such as warping or incomplete filling. Thicker walls provide greater strength and durability but may require longer cooling times and higher material usage.
PA (Nylon) injection molded parts typically have a shrinkage rate of 1.0% to 2.0%, depending on the specific grade and molding conditions. Glass-fiber reinforced nylons generally exhibit lower shrinkage rates due to the added stability provided by the fibers. Accurate prediction and control of shrinkage are essential for maintaining tight tolerances and achieving the desired part dimensions.
Moisture content significantly affects the injection molding process of PA (Nylon). High moisture levels can lead to hydrolysis during processing, resulting in reduced mechanical properties and surface defects such as bubbles or voids. It is crucial to thoroughly dry PA (Nylon) pellets before molding, typically at 80-100°C for 2-4 hours, depending on the material grade and initial moisture content.
The typical processing temperatures for PA (Nylon) injection molding range from 230°C to 290°C, depending on the specific grade of nylon being used. Nylon 6 is usually processed at temperatures between 230°C and 260°C, while Nylon 66 requires slightly higher temperatures, typically between 260°C and 290°C. The mold temperature should be maintained between 80°C and 100°C to ensure proper flow and minimize internal stresses.
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