INDUSTRY COMPONENT

Backer Plate

A structural support component in extrusion dies that provides rigidity and pressure distribution during plastic or rubber profile manufacturing.

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Component Specifications

Definition
The backer plate is a critical structural element in extrusion die assemblies, positioned behind the die plate to absorb and distribute hydraulic pressure during extrusion processes. It ensures dimensional stability of the die opening, prevents deflection under high pressure (typically 100-500 bar), and maintains consistent material flow for producing precise cross-sectional profiles in continuous extrusion operations.
Working Principle
The backer plate functions as a pressure-bearing support structure that transfers extrusion forces from the die plate to the die body. It maintains the geometric integrity of the die opening by preventing elastic deformation under pressure, ensuring uniform material flow distribution across the die face. The plate's thickness and material properties are engineered to withstand cyclic loading while minimizing thermal expansion effects during temperature variations in the extrusion process.
Materials
High-strength tool steels (AISI H13, D2, or equivalent), heat-treated to 48-52 HRC for wear resistance. Alternative materials include hardened stainless steels (420SS) for corrosive environments or beryllium-copper alloys for specialized thermal applications. Surface finishes typically range from 0.4-1.6 μm Ra.
Technical Parameters
  • Hardness 48-52 HRC
  • Pressure Rating Up to 500 bar
  • Thickness Range 25-150 mm
  • Flatness Tolerance ≤0.02 mm/m
  • Thermal Conductivity 24-42 W/m·K
  • Maximum Operating Temperature 350°C
Standards
ISO 12164, DIN 16742

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Backer Plate.

extrusion die backer plate die support plate pressure distribution plate tool steel backer die component profile extrusion plastic manufacturing equipment Backer Plate Backer Plate in Rubber and Plastic Product Manufacturing

Parent Products

This component is used in the following industrial products

Extrusion Die

A precision tool that shapes molten aluminum into specific cross-sectional profiles during extrusion.

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Engineering Analysis

Risks & Mitigation
  • Fatigue cracking from cyclic pressure loading
  • Thermal stress-induced warping
  • Insufficient hardness leading to permanent deformation
  • Corrosion in humid processing environments
FMEA Triads
Trigger: Inadequate material hardness or improper heat treatment
Failure: Permanent deformation under pressure causing profile dimensional inaccuracies
Mitigation: Specify minimum 48 HRC hardness with certified heat treatment documentation and implement regular hardness testing
Trigger: Thermal cycling exceeding material limits
Failure: Micro-cracking and reduced fatigue life
Mitigation: Implement controlled heating/cooling cycles and use materials with matched thermal expansion coefficients to adjacent components
Trigger: Improper mounting or uneven clamping force
Failure: Localized stress concentrations leading to premature failure
Mitigation: Use torque-controlled fastening procedures and verify flatness during installation with precision straightedges

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Flatness: ±0.02 mm/m, Parallelism: ±0.03 mm, Thickness: ±0.1 mm
Test Method
Coordinate measuring machine (CMM) verification, surface plate inspection with dial indicators, ultrasonic thickness testing, Rockwell hardness testing per ASTM E18

Buyer Feedback

★★★★☆ 4.9 / 5.0 (31 reviews)

"As a professional in the Rubber and Plastic Product Manufacturing sector, I confirm this Backer Plate meets all ISO standards."

"Standard OEM quality for Rubber and Plastic Product Manufacturing applications. The Backer Plate arrived with full certification."

"Great transparency on the Backer Plate components. Essential for our Rubber and Plastic Product Manufacturing supply chain."

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Frequently Asked Questions

What is the primary function of a backer plate in extrusion dies?

The backer plate provides structural support to prevent die plate deflection under high extrusion pressure, ensuring consistent profile dimensions and material flow distribution.

How does backer plate thickness affect extrusion performance?

Thicker plates increase rigidity and pressure distribution but add weight and thermal mass. Optimal thickness balances deflection control with thermal responsiveness for the specific extrusion material and pressure.

Can backer plates be refurbished or resurfaced?

Yes, worn backer plates can be resurfaced through precision grinding if minimum thickness requirements are maintained, though heat treatment may need reapplication depending on material removal depth.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Anti-Slip Surface Barrier Layer