INDUSTRY COMPONENT

Die Body

The die body is the core component of a high-efficiency feed pellet mill that shapes and compresses feed material into uniform pellets through extrusion.

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Component Specifications

Definition
The die body, also known as the pellet die or ring die, is a precision-engineered cylindrical component in a high-efficiency feed pellet mill. It contains an array of precisely machined holes (die holes) through which feed mash is forced under high pressure by rotating rollers. This process compresses the material, generating heat and binding it into dense, uniform cylindrical pellets. The die body's design directly determines pellet size, shape, density, and production throughput. It is a critical wear part subject to extreme mechanical stress, abrasion, and thermal cycling.
Working Principle
The die body operates on the principle of extrusion and compaction. Feed material (mash) is fed into the gap between the rotating die body and stationary (or counter-rotating) rollers. The rollers press the material against the inner surface of the die body, forcing it through the tapered die holes. Friction and pressure within the holes generate heat (typically 70-90°C), which plasticizes natural binders (like starch) in the feed, causing the material to bind together. The extruded strands are cut to length by external knives to form pellets.
Materials
High-chromium alloy steel (e.g., X46Cr13, D2 equivalent), through-hardened to 58-62 HRC for optimal wear resistance and toughness. Premium versions may use tungsten carbide-lined die holes for extended life in abrasive applications.
Technical Parameters
  • Hole Pattern Staggered or straight
  • Working Width 40-120 mm
  • Outer Diameter 300-800 mm
  • Surface Finish < 0.8 μm Ra
  • Die Hole Diameter 2.0-12.0 mm
  • Taper Inlet Angle 30-45 degrees
  • Compression Ratio (L/D) 8:1 to 20:1
Standards
ISO 9001, DIN 8580

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Die Body.

pellet die ring die feed pellet mill die die body specification pellet compression feed processing component die maintenance pellet quality Die Body Die Body in Food Manufacturing

Parent Products

This component is used in the following industrial products

High-Efficiency Feed Pellet Die

Perforated steel die for shaping animal feed pellets in extrusion processes.

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Annular Die

A critical component in plastic film blowing machines that shapes molten plastic into a continuous tubular film.

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Engineering Analysis

Risks & Mitigation
  • Premature wear from abrasive feed ingredients
  • Die hole blockage due to improper mash conditioning
  • Fatigue cracking from cyclic thermal and mechanical stress
  • Reduced pellet quality from worn die holes
FMEA Triads
Trigger: Excessive abrasive wear from high-silica feed materials.
Failure: Enlarged die holes produce oversized, low-density pellets; increased power consumption.
Mitigation: Use tungsten carbide-lined dies for abrasive feeds; implement feed ingredient screening to reduce silica; monitor pellet size and density regularly.
Trigger: Thermal fatigue from repeated heating/cooling cycles without controlled temperature management.
Failure: Micro-cracks propagate, leading to catastrophic die body fracture.
Mitigation: Implement pre-heating protocols before startup; use temperature-controlled conditioning; avoid sudden shutdowns with hot material in the die.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Die hole diameter tolerance: ±0.05 mm; concentricity: < 0.1 mm TIR; hardness uniformity: ±1 HRC.
Test Method
Dimensional inspection via CMM; hardness testing per ASTM E18; metallographic analysis for microstructure; production trial with standard feed recipe to verify pellet specifications.

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Feed hopper for continuous screw press oil extraction machines that controls material flow into the pressing mechanism.
Conical Body
Conical body component for starch hydrocyclone separation systems enabling centrifugal separation of starch particles from process water.
Inlet Flange
Inlet flange for starch hydrocyclone separation cone, connecting feed pipeline to separation chamber.

Frequently Asked Questions

What factors affect the lifespan of a pellet die body?

Lifespan is primarily affected by material abrasiveness (e.g., silica content in feed), operating pressure, maintenance of proper roller-die clearance, regular cleaning to prevent corrosion, and using appropriate die material (alloy steel vs. carbide) for the application.

How does die hole compression ratio influence pellet quality?

Higher compression ratios (longer hole length relative to diameter) increase compaction pressure and residence time, producing denser, more durable pellets with lower fines. However, they also increase power consumption and may require higher moisture content or binders.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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