Eccentric Crusher Jaw Plate
Eccentric Crusher Jaw Plate
Eccentric Crusher Jaw Plate
Eccentric Crusher Jaw Plate
Eccentric Crusher Jaw Plate
Eccentric Crusher Jaw Plate
+
  • Eccentric Crusher Jaw Plate
  • Eccentric Crusher Jaw Plate
  • Eccentric Crusher Jaw Plate
  • Eccentric Crusher Jaw Plate
  • Eccentric Crusher Jaw Plate
  • Eccentric Crusher Jaw Plate

I. Basic Overview and Classification of Crusher Jaw Plates

The jaw plate is the core wear-resistant component of a jaw crusher, directly contacting the material and performing the crushing action through compression. It comes in two types: the moving jaw plate and the stationary (fixed) jaw plate—resembling the "upper and lower jaws" of an animal. By combining the periodic swinging motion of the moving jaw plate with the stationary plate, the machine applies compressive and shearing forces to break down the material. Depending on the specific model of the jaw crusher, jaw plates are available in various sizes and specifications. For instance, the 500×750 model crusher is designed to work optimally with a particular-sized jaw plate—and it’s crucial that the plate matches the equipment model precisely to maintain maximum crushing efficiency.

II. Structure, Function, and Working Principle of Crusher Jaw Plates

1. Core structural components

The moving jaw plate: Driven by an eccentric shaft to perform periodic oscillating motion, it is the active crushing component, and its movement trajectory directly affects crushing efficiency.

Fixed jaw plate: Attached to the crusher frame, it forms the crushing chamber with the moving jaw plate and bears the reaction force from the material.

Side lining plates: Installed on both sides of the crushing chamber, typically made of cast steel, they provide auxiliary wear resistance and are classified as chisel-type abrasive wear parts—specifically, part 5.

2. Operating Principle

The electric motor drives the eccentric shaft to rotate via a pulley, causing the moving jaw plate to perform reciprocating up-and-down motion.

Rising phase: The angle between the elbow plate and the moving jaw increases, pushing the moving jaw plate closer to the stationary jaw plate, thereby squeezing and crushing the material.

Descending phase: The angle decreases, and the moving jaw plate returns to its original position under the action of the tie-rod spring. The crushed material is then discharged through the discharge opening.

During this process, the lower part of the鄂 plate typically wears out faster than the upper part due to more frequent contact with the material.

3. Core Material Properties

Metrics

Parameters

Comparison of Traditional Materials

Initial Hardness

HB 180-220

Lower than high-chromium cast iron (HRC 60+)

Hardness after work hardening

HB 500–550

Increase by more than 2 times

Tensile strength

≥800 MPa

Superior to ordinary carbon steel (450 MPa)

Elongation

≥35%

Impact-resistant and不易断裂

Impact toughness

≥150 J/cm²

Five times that of high-chromium cast iron

III. Jaw Plate Structural Design and Manufacturing Process

1. Tooth Profile Optimization

Tooth profile

Applicable Scenarios

Breakage Efficiency

Wavy teeth

Hard rock (granite, iron ore)

High biting force, prevents material jamming

Triangular teeth

Medium-hard rock (limestone, basalt)

Balanced Wear Life

Trapezoidal teeth

Viscous material (clay ore)

Anti-blocking material design

2. Casting Process

Water glass sand mold casting: Ensuring clear contour definition (dimensional tolerance CT10)

Riser Optimization: Computer simulations of the solidification process reduce shrinkage cavities (X-ray inspection meets ASTM E186 standards).

3. Surface Enhancement

Explosive Hardening: Pre-hardened surface up to HB 380–400, extending initial service life by 30%

Overlay welding repair: After wear, local repairs can be performed using high-chromium alloy welding electrodes (D667).

IV. Application Scenarios and Lifespan Reference

Eccentric plates are widely used in fields such as mining, metallurgy, building materials, and construction waste management. They can crush brittle materials—like ores, rocks, and concrete blocks—with compressive strengths not exceeding 320 MPa—and serve as the critical component that enables jaw crushers to perform "primary crushing."

Crushed Materials

Compressive Strength (MPa)

Jaw Plate Life (Hours)

Failure Mode

Granite

150–300

300–400

Tooth root fatigue fracture

Iron ore

200–350

250–350

Impact pitting + spalling

Limestone

80–150

600–800

Uniform wear

Construction waste

Mixed metals

150–250

Localized tooth loss

Life Extension Program:

Pre-screening to remove metal impurities; adjust the discharge opening to be at least 1.3 times the feed particle size (to reduce overload impact).

Design Optimization: Ensure the crushing chamber angles between the moving jaw and stationary jaw are properly aligned to minimize the impact load of material on the jaw plates.

Two-way usage: When the lower part of the jaw plate is severely worn, it can be installed upside down—reversing its position—to continue working with the still-undamaged upper section.

Regular maintenance: Promptly clear any remaining material in the crushing chamber, and check whether the tightening bolts are loose, to prevent excessive wear of the jaw plates due to increased vibration.

5. Maintenance and Inspection

Daily Inspection: Measure tooth height wear weekly (replace if wear exceeds 15% of the original height)

Bolt Pre-tightening Force Inspection (Torque Value ≥ 980 N·m)

Failure Analysis: Metallographic Examination: Check for the presence of grain boundary carbides due to insufficient cooling.

Hardness Gradient Test: Verify the Depth of the Work-Hardened Layer (should be ≥30 mm)

Keywords

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Eccentric Crusher Jaw Plate
Eccentric Crusher Jaw Plate
Eccentric Crusher Jaw Plate
Eccentric Crusher Jaw Plate
Eccentric Crusher Jaw Plate
Eccentric Crusher Jaw Plate
+
  • Eccentric Crusher Jaw Plate
  • Eccentric Crusher Jaw Plate
  • Eccentric Crusher Jaw Plate
  • Eccentric Crusher Jaw Plate
  • Eccentric Crusher Jaw Plate
  • Eccentric Crusher Jaw Plate

Eccentric Crusher Jaw Plate

The jaw plate is the core wear-resistant component of a jaw crusher, directly contacting the material and performing the crushing function through compression. Its role closely resembles that of an animal's "upper and lower jaws"—the moving jaw plate periodically swings in coordination with the stationary jaw plate, applying compressive force to break down the material effectively. Jaw plates come in various size specifications; for instance, the 500×750 model crusher is designed to work optimally with a specific-sized jaw plate, which must precisely match the equipment model to ensure maximum crushing efficiency. Widely used in industries such as mining, metallurgy, building materials, and construction waste management, these plates can handle brittle materials like ores, rocks, and concrete blocks with compressive strengths not exceeding 320 MPa. They are essential components that enable jaw crushers to perform "primary crushing," serving as the key link in the initial stage of material reduction.

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