O We implemented ISO 9001:2015 quality certification management system
O Mould precision up to 0.002mm
O 100% inspection on all products and strictly controls the quality
The Four-Segment Split Die, also known as a Four-Segment Cold Heading Die or Four-Piece Segmented Die, is a precision-engineered tooling solution designed for high-load Cold Heading and forming operations.
This die system consists of four precision-machined die segments assembled inside a tapered die case, forming a complete and highly stable forming cavity.
Thanks to its segmented structure and radial support design, the precision split die provides excellent strength, dimensional accuracy, and tool life, making it ideal for manufacturing high-strength fasteners and complex cold-forged components.
Die Case (Outer Tapered Sleeve)
Provides uniform radial compression and precise alignment of the die segments during operation.
Four Die Segments (Inner Forming Inserts)
Four removable and interchangeable segments form the complete cavity when assembled.
Each segment is accurately ground to ensure concentricity, surface finish, and load balance.
This four-piece segmented die design allows the forming forces to be distributed evenly in the radial direction, significantly reducing internal stress concentration compared to solid dies.
The 4-segment forging die structure ensures strong radial support under extreme forming loads, minimizing deformation and extending die life.
Tight dimensional tolerances and optimized segment geometry guarantee excellent repeatability and surface quality of the finished parts.
Individual die segments can be replaced independently, reducing downtime and tooling replacement costs.
Suitable for forming hex heads, flange heads, stepped profiles, and other complex geometries commonly used in fastener manufacturing.
Designed to perform reliably in continuous high-speed cold heading operations.
The Segmented Cold Heading Die is widely used in the production of:
High-strength bolts and screws
Automotive fasteners
Hex head and flange head fasteners
Structural fasteners made from alloy steel or stainless steel
Complex cold-forged metal components
This Four-Segment Cold Heading Die is commonly installed on:
Two-die four-blow cold heading machines
Multi-station cold heading machines
High-speed fastener forming lines
Within a complete cold heading system:
Cold Heading Punch provides axial forming force
Four-Segment Split Die provides radial containment and cavity shaping
Both components work together to achieve precise and stable cold forging results.
High-grade tool steel selection
CNC machining and precision turning
Heat treatment for optimal hardness and toughness
Precision grinding of die segments
Dimensional inspection and assembly verification
Each precision split die is manufactured under strict quality control to ensure consistent performance in demanding industrial environments.
We offer full customization based on customer drawings and application requirements, including:
Segment quantity and cavity design
Material selection (tool steel grades)
Surface finish and coating options
Die case dimensions and taper angles
Whether you require a standard four-piece segmented die or a customized 4-segment forging die, our engineering team can support your project from design to production.
A Four-Segment Split Die is a type of segmented cold heading die composed of four precision-machined die segments assembled inside a tapered die case.
When combined, the segments form a complete forming cavity that provides strong radial support during cold heading or forging operations.
This die is primarily used for cold heading, especially in fastener manufacturing.
However, depending on the application, it may also be referred to as a 4-segment forging die when used in high-load forming or sizing operations.
The structure itself is universal and not limited to a single forming process.
A four-piece segmented die offers several advantages over a solid die:
Better radial load distribution
Reduced internal stress concentration
Longer tool life
Easier maintenance and lower replacement cost
Individual segments can be replaced without changing the entire die
These benefits make it ideal for high-volume and high-strength fastener production.
This precision split die is commonly used to manufacture:
High-strength bolts and screws
Automotive fasteners
Hex head and flange head fasteners
Stainless steel and alloy steel fasteners
Complex cold-forged metal components
The Segmented Cold Heading Die is typically used on:
Two-die four-blow cold heading machines
Multi-station cold heading machines
High-speed fastener forming equipment
It works together with the cold heading punch, which applies axial force while the die provides radial containment.
Yes. One of the key advantages of a Four-Segment Split Die is that each segment can be replaced independently.
This significantly reduces downtime and tooling costs compared to one-piece dies.
Die segments are typically made from high-grade tool steels, selected according to the application requirements.
Material choice and heat treatment are optimized to achieve the best balance between hardness, wear resistance, and toughness.
Yes. We provide full customization based on customer drawings or samples, including:
Cavity shape and dimensions
Segment geometry
Tool steel grade selection
Surface finish and coating options
Die case size and taper angle
Both standard and custom Four-Piece Segmented Dies are available.
For 27 years, Donglong has been focusing on the design, development and manufacture of precision screw molds.
Copyright © 2025 Dongguan Donglong Mold All rights reserved. Privacy Policy
