Special-Shaped Pins and Mold Pins Processing Technology｜For Cemented Carbide and Ceramics
Special-shaped pins are critical components used as mold pins in various manufacturing settings. Particularly in the battery, electronic component, and semiconductor fields, they are frequently employed as mold core pins or press die pilot pins, demanding high precision and durability. Sanwa Creation Co., Ltd. manufactures special-shaped pins accommodating diverse forms, including elliptical, square, triangular to polygonal, and eccentric designs.

◇ Mold Pins as Special Shaped Pins
Mold pins are pins used inside molds, essential components for shaping molded products. Particularly in mold dies, high precision is required to accurately maintain the product's shape and dimensions. Unlike standard round pins, special shaped pins feature complex forms such as ellipses, squares, triangles, or eccentric shapes, necessitating more advanced machining techniques.

◇Features of Special-Shaped Pins
Beyond their distinct shapes, special-shaped pins offer diverse characteristics:

1. Oval Pins: Function as guides to prevent rotation, enabling stable positioning.
2. Square Pins: Provide high clamping force at corners, preventing slippage.
3. Triangular/Polygonal Pins: Used for chamfering and drilling applications, also serving as reamers.
4. Eccentric Pins: Offset positioning from the shank enables smaller mold designs and optimized space utilization.

These special-shaped pins are engineered for specific applications, such as battery case processing, micro-hole machining for electronic components, and semiconductor forming processes. When used as mold pins, exceptional wear resistance and high precision are essential.

◇Materials and Characteristics
Mold pins, as special-shaped pins, utilize the following materials selected based on application:

1. Cemented Carbide: Offers excellent wear resistance and minimal shape change, ensuring long service life. Its strength allows continuous use in press dies.

2. Zirconia Ceramics: A material with corrosion resistance and non-magnetic properties, suitable for electronic components and semiconductor manufacturing requiring clean environments.

3. SKH51 (High-Speed Steel): Maintains stable strength even in high-temperature environments, achieving high durability in battery component molding.

◇Applications of Special-Shaped Pins
Special-shaped pins are widely used in the following manufacturing fields:

- Battery mold pins: Maintaining dimensional accuracy during case molding
- Positioning pins for electronic components: Ensuring precise placement and drilling
- Guide pins in semiconductor manufacturing: Securing parts within mold dies
- Miniaturization solutions for mold interiors: Utilizing eccentric pins to optimize internal space

In these fields, high precision and wear resistance are particularly critical for mold pins, leading to widespread adoption of products made from cemented carbide or ceramics.

◇Product Specifications
- Material: Cemented carbide, zirconia ceramics, SKH51
- Dimensions: Shank diameter φ2 to φ12, total length up to 150L
- Precision: Within 1/1000mm
- Lot Size: 1 to unlimited

◇Summary
As special-shaped pins, mold pins are indispensable components in the battery, electronic component, and semiconductor fields. They accommodate shape variations such as oval, square, triangular, and eccentric, utilizing super-hard alloys and ceramic materials to achieve high durability. Sanwa Creation meets the needs for special-shaped pins through custom manufacturing.

◇Contact Information
Sanwa Creation Co., Ltd.
1-26-8 Miyauchi, Nakahara-ku, Kawasaki-shi, Kanagawa 211-0051
TEL: 044-740-6800
FAX: 044-740-6801
https://www.sanwa-creation.co.jp