Mould Components: 40Cr Ejector Pins & SKD61 Punch Pins for Precise Operation

The detail information of product

VINACNC - Expert in High-Precision Ejector and Punch Pins for Plastic Molds

In the mould industry, ejector pins and punching pins are core components that determine the precision and efficiency of the manufacturing process. VINACNC is proud to supply 40Cr ejector pins and SKD61 punch pins with a specific dimension of 8mm diameter and 150mm length, along with high hardness and tight tolerances, ensuring superior performance and durability even under harsh production conditions.

Technical Specifications, Materials, and Applications

Materials: The products are crafted from high-quality tool steels:
- 40Cr Steel: Typically used for ejector pins, a high-quality alloy steel with good strength and hardness after heat treatment.
- SKD61 Steel (JIS): Typically used for punching pins, a widely used tool steel known for its hardness, strength, and good heat resistance.
Technical Properties:
- Dimensions: 8mm diameter, 150mm length. These dimensions can be customized according to customer requirements.
- Tip: Features a round tip, which minimizes marks on the plastic product after ejection.
- Hardness: After heat treatment, the materials achieve a stable hardness (typically around HRC 45-54°), allowing the pins to withstand high pressure and friction during continuous operation.
- Precision: The products are machined with extremely tight diameter tolerances, ensuring a perfect fit with the mold, preventing material leakage, and guaranteeing the accuracy of the final product.
Applications: Ejector pins and punch pins are indispensable components in plastic injection molds and stamping dies for part ejection and hole punching.

Product Advantages

Superior Durability and Performance: With high-quality materials, the ejector and punch pins resist repetitive force and pressure, extending the mould's lifespan.
Absolute Precision: Dimensions are strictly controlled down to the micrometre level, ensuring the components operate in perfect conjunction, minimizing the risk of material leakage and product defects.
Optimized Efficiency: The smooth operation helps to reduce the cycle time and enhances overall production efficiency.
Versatile Application: The combination of ejector pins (for pushing parts out) and punch pins (for making holes) allows for use in various mold types, from plastic injection to stamping dies.

Post-Machining Product Inspection Process

Hardness Test: We use a professional hardness tester to verify the hardness of the heat-treated material, ensuring it meets technical specifications.
Dimensional and Tolerance Check: We use a Coordinate Measuring Machine (CMM) or other high-precision measuring instruments to check the diameter, length, and concentricity.
Surface Inspection: We use a surface roughness tester and visual inspection to ensure there are no cracks, scratches, or other defects.
Functionality Test: The components are test-fitted with related parts to ensure a perfect fit and smooth operation.

Packaging and Storage Process

Cleaning and Rust Prevention: The components are cleaned and coated with a specialized anti-rust oil to protect their precision surfaces.
Secure Packaging: Products are carefully packed in rigid plastic boxes or cardboard crates with foam to prevent damage during transport.
Information Labeling: The packaging is clearly labeled with the product code, weight, dimensions, and handling instructions.
Storage Instructions: We recommend storing the products in a dry, cool environment, away from high humidity and corrosive chemicals.