Die Head for Food Extrusion | Component Specifications

Product Specifications

Technical details and manufacturing context for Die Head

Definition

A die head is the critical terminal component of an industrial food extrusion and forming machine. It is where the food material, under pressure from the extruder barrel, is forced through precisely engineered openings to create specific shapes, textures, and sizes. The die head serves as the interface between the extrusion process and the final product form, directly influencing product characteristics such as density, surface finish, and structural integrity. In food manufacturing, die heads are used to produce a wide range of products, including pasta, snacks, cereals, and pet foods. The die head receives a continuous flow of plasticized food mass (dough, paste, or melt) from the extruder screw and barrel assembly. This material is forced under high pressure through the die's internal flow channels (manifold), which distribute it evenly to one or more shaping orifices (die plates or inserts). The geometry, size, and surface finish of these orifices define the final product's cross-section (e.g., strands for pasta, pellets for snacks, sheets for cereals). Upon exiting the die, the shaped material may be cut, cooled, or further processed. Die heads are typically made from stainless steel (e.g., 304, 316), tool steel, or hardened alloy steel to withstand the high pressures and temperatures involved. Key parameters include die opening width (50–300 mm), height (1–10 mm), number of outlets (1–8), operating temperature (80–200 °C), operating pressure (1.0–1.6 MPa), surface roughness (Ra 0.4–0.8 µm), material grade (SUS304/SUS316L, per ASTM A240), hardness (HRC 40–50), weight (15–60 kg), and tolerance (±0.05 mm, per ISO 2768-m). These values are 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 head receives a continuous flow of plasticized food mass from the extruder screw and barrel assembly. This material is forced under high pressure through the die's internal flow channels (manifold), which distribute it evenly to one or more shaping orifices (die plates or inserts). The geometry, size, and surface finish of these orifices define the final product's cross-section (e.g., strands for pasta, pellets for snacks, sheets for cereals). Upon exiting the die, the shaped material may be cut, cooled, or further processed.

Common Materials

Stainless Steel (e.g., 304, 316), Tool Steel, Hardened Alloy Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Die Opening Width	50–300 mm	Determines product width; custom widths available
Die Opening Height	1–10 mm	Controls product thickness
Number of Outlets	1–8	More outlets increase throughput
Operating Temperature	80–200 °C	Must match extrusion temperature
Surface Roughness	Ra 0.4–0.8 µm	Smoother surface reduces sticking
Material Grade	SUS304/SUS316L	316L for corrosive environmentsASTM A240
Hardness	HRC 40–50	Higher hardness increases wear resistance
Weight	15–60 kg	Affects handling and installation
Tolerance	±0.05 mm	Critical for uniform product shapeISO 2768-m

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

Die Body/Housing
The main structural frame that holds all internal components, connects to the extruder barrel, and withstands operational pressure.

Material: Stainless Steel
Die Plate/Insert Part
A removable plate containing the precise shaping orifices. It defines the product profile and is interchangeable for different products.

Material: Hardened Tool Steel or Stainless Steel
Flow Distributor (Manifold) Part
Internal channels within the die head that evenly distribute the incoming food mass to all die orifices to ensure uniform product quality.

Material: Stainless Steel
Heating/Cooling Jacket
An optional external or internal system to maintain precise temperature control of the die head, critical for melt viscosity and product texture.

Material: Stainless Steel with Copper or Steel Tubing

Manufacturers of Die Head

Manufacturer profiles associated with Die Head.

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Frequently Asked Questions

What is the primary function of a die head in food extrusion?

The die head is the final shaping component that determines the cross-sectional profile of extruded food products. It forces the plasticized food mass through precisely engineered openings to create specific shapes, textures, and sizes.

What materials are commonly used for die heads?

Common materials include stainless steel (e.g., 304, 316), tool steel, and hardened alloy steel. The choice depends on the application, with 316L recommended for corrosive environments.

What are typical operating parameters for a die head?

Typical reference ranges include die opening width 50–300 mm, height 1–10 mm, number of outlets 1–8, operating temperature 80–200 °C, operating pressure 1.0–1.6 MPa, surface roughness Ra 0.4–0.8 µm, hardness HRC 40–50, and tolerance ±0.05 mm (per ISO 2768-m). These must be confirmed for the specific model.

How does the die head affect product quality?

The die head directly influences product density, surface finish, and structural integrity. Uniform flow distribution and precise orifice geometry are critical for consistent product shape and texture.

Data Basis

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

Preliminary Technical Classification

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pressure:	Up to 200 bar (2900 psi)
flow rate:	50-2000 kg/hr (110-4400 lb/hr)
temperature:	40-180°C (104-356°F)
slurry concentration:	Up to 70% solids by weight

Die Head

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