INDUSTRY COMPONENT

Stationary Platen

Stationary platen is the fixed mounting plate in injection molding machines that holds the mold's stationary half during clamping operations.

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Component Specifications

Definition
The stationary platen is a critical structural component in injection molding machines' clamping units, designed to securely mount and support the stationary half of the mold. It remains fixed in position while the moving platen applies clamping force, ensuring precise mold alignment and uniform pressure distribution during injection cycles. Engineered for high rigidity and minimal deflection under extreme tonnage forces, it typically incorporates standardized mounting patterns, tie-bar connections, and cooling channels for thermal management.
Working Principle
The stationary platen provides a rigid, fixed reference point for mold mounting. During clamping operations, hydraulic or mechanical systems drive the moving platen toward the stationary platen, compressing the mold halves together with precise force (measured in tons). The stationary platen absorbs this clamping force through its connection to the machine frame and tie-bars, maintaining dimensional stability to prevent mold flash and ensure part quality. Its fixed position allows for consistent mold alignment and facilitates automated mold changing systems.
Materials
High-strength cast steel (ASTM A27/A148 grades), forged steel (AISI 4140/4340), or ductile iron with tensile strength 500-800 MPa, yield strength 350-600 MPa, hardness 200-300 HB. Heat-treated for stress relief and enhanced fatigue resistance. Surface treatments may include nitriding or chrome plating for wear resistance.
Technical Parameters
  • Weight 200-5000kg depending on size
  • Platen Size Standard dimensions: 400x400mm to 2000x2000mm
  • Tie-bar Spacing Center distances: 300-1800mm
  • Cooling Channels Integrated for thermal control
  • Mounting Pattern Standardized T-slots or threaded holes (ISO, JIS patterns)
  • Surface Flatness ≤0.02mm/m²
  • Deflection Tolerance <0.1mm under maximum load
  • Clamping Force Capacity 50-5000 tons
Standards
ISO 12165, DIN 24482, JIS B 6702

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Stationary Platen.

stationary platen injection molding machine clamping unit mold mounting plate fixed platen plastic molding equipment industrial machinery components Stationary Platen in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Clamping Unit

A mechanical assembly in silicone molding machines that securely closes and holds the mold halves together under high pressure during the injection and curing phases.

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Engineering Analysis

Risks & Mitigation
  • Fatigue cracking under cyclic loading
  • Thermal distortion from uneven heating
  • Wear at tie-bar connection points
  • Corrosion in humid environments
  • Improper mold mounting causing stress concentrations
FMEA Triads
Trigger: Cyclic loading exceeding fatigue limits
Failure: Crack propagation leading to catastrophic fracture
Mitigation: Regular non-destructive testing (ultrasonic/magnetic particle), proper load distribution, material upgrades
Trigger: Thermal expansion mismatch with mold
Failure: Platen warping causing mold misalignment
Mitigation: Integrated cooling channels, thermal monitoring, controlled heating cycles
Trigger: Improper mold mounting procedures
Failure: Localized stress concentrations and premature wear
Mitigation: Standardized mounting protocols, torque-controlled fasteners, alignment verification

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Flatness: ±0.02mm/m², Parallelism: ±0.05mm relative to moving platen, Positional accuracy: ±0.1mm for mounting features
Test Method
Laser alignment verification, dial indicator measurements, ultrasonic thickness testing, finite element analysis validation

Buyer Feedback

★★★★☆ 4.9 / 5.0 (32 reviews)

"Testing the Stationary Platen now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Stationary Platen meets all ISO standards."

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Frequently Asked Questions

What is the difference between stationary and moving platens?

The stationary platen remains fixed to the machine frame and holds the stationary mold half, while the moving platen travels along tie-bars to open/close the mold and applies clamping force.

How often should stationary platens be inspected?

Visual inspections should occur daily, dimensional checks monthly, and comprehensive structural assessments annually or every 10,000 operating hours.

Can stationary platens be repaired if damaged?

Minor surface damage can be machined flat, but structural cracks or significant deformation typically require replacement due to safety concerns.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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