Die Body/Housing for Extrusion Dies | Component Specifications

Product Specifications

Technical details and manufacturing context for Die Body/Housing

Definition

The die body or housing is the primary structural frame of a die head assembly, typically made from high-strength materials to withstand extrusion pressures. It serves as the containment vessel that houses the die plate, breaker plate, heating elements, and other internal components while providing mounting interfaces for the extruder barrel and downstream equipment. Its design ensures proper alignment, thermal management, and structural integrity during the extrusion process. The die body is a critical component in machinery and equipment manufacturing, specifically within extrusion systems. It is typically manufactured from tool steel, stainless steel, or alloy steel, with material grades such as 45# steel or 40Cr referenced in standards GB/T 699 and GB/T 3077. Hardness is typically specified in the range of 28–32 HRC, and surface roughness is maintained at Ra 0.8–1.6 μm to ensure proper sealing and wear resistance. The cavity diameter can range from 50 to 300 mm, and overall dimensions vary from 200×200×150 mm to 600×600×400 mm, with weights between 50 and 500 kg. Operating temperature ranges from -20°C to 200°C, and operating pressure is typically 1.0–1.6 MPa. Tolerance grades are IT7–IT8, with concentricity and flatness limited to ≤0.02 mm and ≤0.05 mm, respectively. Sealing surface finish is Ra 0.4–0.8 μm, and corrosion resistance is verified via salt spray testing for 48–72 hours. These parameters are directory reference ranges and must be confirmed for the specific model and application. Always verify model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The die body provides a rigid, sealed enclosure that maintains precise alignment of internal die components while withstanding high temperatures and pressures during material extrusion. It facilitates heat transfer from heating elements to the material flow path and ensures consistent material flow distribution through the die assembly. The body's structural integrity prevents deformation under load, and its mounting interfaces ensure proper connection to the extruder and downstream equipment. Thermal management is achieved through the material's thermal conductivity and the design of heating element placement. The die body also acts as a pressure vessel, containing the extrusion pressure within safe limits. Proper alignment of internal components is critical to achieving uniform wall thickness and product quality. The die body's sealing surfaces prevent leakage of molten material, and its surface finish reduces friction and wear. The operating principle relies on the die body's ability to maintain dimensional stability under varying thermal and mechanical stresses, ensuring consistent extrusion output.

Common Materials

Tool steel, Stainless steel, Alloy steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Material Grade	45# steel or 40Cr	Higher strength and wear resistance for high-pressure diesGB/T 699, GB/T 3077
Hardness	28–32 HRC	Balances toughness and wear resistanceGB/T 230.1
Surface Roughness	Ra 0.8–1.6 μm	Affects die life and product finishGB/T 1031
Cavity Diameter	50–300 mm	Determines maximum part size
Overall Dimensions	200×200×150 – 600×600×400 mm	Must fit press and die set
Weight	50–500 kg	Affects handling and press capacity
Operating Temperature	-20–200 °C	Above 200°C may require heat-resistant alloys
Operating Pressure	1.0–1.6 MPa
Tolerance Grade	IT7–IT8	Critical for alignment of internal componentsISO 286-1
Concentricity	≤0.02 mm	Ensures uniform wall thickness and balanceISO 1101
Flatness	≤0.05 mm	Affects sealing and mountingISO 1101
Sealing Surface Finish	Ra 0.4–0.8 μm	Prevents leakage under pressureGB/T 1031
Corrosion Resistance	Salt spray 48–72 h	Required for humid or chemical environmentsGB/T 10125

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Housing Body
The housing itself: encloses and locates the internal parts and provides the mounting interface.
Mounting Flange Part
Provides secure attachment interface to extruder barrel

Material: steel
Heating Element Channels
Houses cartridge heaters or band heaters for temperature control

Material: steel
Thermocouple Wells
Accepts temperature sensors for process monitoring

Material: steel
Flow Channels Part
Directs material flow from extruder to die plate

Material: steel

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Die Head

View system integration details

Manufacturers of Die Body/Housing

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Frequently Asked Questions

What materials are commonly used for die bodies?

Common materials include tool steel, stainless steel, and alloy steel. Specific grades such as 45# steel or 40Cr are referenced in standards GB/T 699 and GB/T 3077. The choice depends on required strength, wear resistance, and operating environment.

What are typical hardness and surface roughness values?

Hardness is typically specified as 28–32 HRC, and surface roughness is Ra 0.8–1.6 μm for general surfaces. Sealing surfaces may require a finer finish of Ra 0.4–0.8 μm. These values affect die life and product finish.

How do I verify the die body meets my requirements?

Check the specified parameters such as cavity diameter, overall dimensions, weight, operating temperature, pressure, tolerance grade, concentricity, flatness, and corrosion resistance. Always confirm these values with the legal manufacturer or supplier for your specific model and application.

What standards apply to die body manufacturing?

Relevant standards include GB/T 699 for material, GB/T 3077 for alloy steel, GB/T 230.1 for hardness, GB/T 1031 for surface roughness, ISO 286-1 for tolerance, ISO 1101 for geometric tolerances, and GB/T 10125 for salt spray testing. These are verification references, not proof of certification.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 10,000 psi (690 bar) standard, higher with specialized designs
flow rate:	Dependent on internal geometry and port sizing
temperature:	-40°C to 400°C (dependent on material grade)
slurry concentration:	Up to 60% solids by weight (material dependent)

Die Body/Housing

Product Specifications

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