Editorial Technical Reference

Mold Assembly / Fixture

This page explains how Mold Assembly / Fixture is classified within Rubber and Plastic Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A specialized assembly or fixture used to hold and position molds during silicone molding processes.

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Mold Assembly / Fixture in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Mold Assembly / Fixture

Definition
The Mold Assembly/Fixture is a critical component of a Silicone Molding Station that securely holds the mold in precise alignment during the injection, curing, and demolding phases. It ensures dimensional accuracy, repeatability, and proper mold closure to produce consistent silicone parts with minimal defects. The fixture is typically constructed from steel or aluminum alloy, with material grades such as S45C–S55C and surface hardness of HRC 40–50, as referenced in the directory. It is designed to operate within a clamping force range of 50–200 kN, an operating pressure of 0.6–1.0 MPa, and an operating temperature range of -20 to 120°C. Positioning accuracy is maintained at ±0.02 mm, and the ingress protection rating is IP54–IP65 (per IEC 60529). The fixture's footprint ranges from 600×600 to 1200×1200 mm, and its weight is typically 50–150 kg, which may require crane handling for heavier units. These parameters are directory reference ranges and must be confirmed for the specific model and application with the legal manufacturer or supplier. The fixture's design must fit within the press platen area and accommodate the mold's dimensions and weight. It incorporates mechanisms for easy mold insertion and removal, alignment pins, and pressure distribution to prevent mold deformation during curing. The working principle involves clamping or securing the mold halves together, maintaining alignment under pressure during silicone injection. Insufficient clamping force can cause mold shift and flash, while excessive force may deform the fixture. The fixture is essential for achieving consistent part quality and minimizing defects in silicone molding operations.
Working Principle
The fixture clamps or secures the mold halves together, maintaining alignment under pressure during silicone injection. It may incorporate mechanisms for easy mold insertion/removal, alignment pins, and pressure distribution to prevent mold deformation during the curing process. The clamping force is applied within a specified range (50–200 kN) to ensure proper mold closure without causing damage. Operating pressure (0.6–1.0 MPa) is maintained. Positioning accuracy (±0.02 mm) is achieved through precision alignment features. The fixture operates within a temperature range of -20 to 120°C, and its ingress protection (IP54–IP65) safeguards against dust and water jets. The material grade and surface hardness are selected for wear resistance and durability. The fixture's footprint and weight must be compatible with the press platen and handling equipment. Proper maintenance and verification of these parameters are essential for reliable operation.
Common Materials
Steel, Aluminum alloy
Technical Parameters
ParameterTypical rangeNotes & selection driver
Clamping Force50–200 kNInsufficient force causes mold shift and flash
Positioning Accuracy±0.02 mmTighter tolerance ensures mold alignment
Operating Temperature-20–120 °CExceeding range may deform fixture
Ingress ProtectionIP54–IP65Protects against dust and water jetsIEC 60529
Material GradeS45C–S55CHigher carbon for wear resistanceGB/T 699
Surface HardnessHRC 40–50Hardness affects durabilityGB/T 230.1
Weight50–150 kgHeavier fixtures require crane handling
Footprint600×600–1200×1200 mmMust fit within press platen area

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
  • Base Plate Part
    Provides stable mounting surface for the mold assembly
    Material: Steel
  • Clamping Mechanism
    Applies and maintains pressure to hold mold halves together
    Material: Steel alloy
  • Alignment Pins/Bushings Part
    Ensures precise alignment of mold halves during assembly
    Material: Hardened steel
  • Quick-Release Handles Part
    Enables rapid mold changeover between production runs
    Material: Steel with rubber grip

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 100 psi
other spec: Flow Rate: 0-50 L/min, Slurry Concentration: Up to 60% solids by weight
temperature: -20°C to +120°C
Media Compatibility
✓ Silicone elastomers (RTV, LSR) ✓ Polyurethane resins ✓ Epoxy molding compounds
Unsuitable: Highly corrosive acids or bases (e.g., concentrated sulfuric acid, sodium hydroxide solutions)
Sizing Data Required
  • Mold dimensions (L x W x H)
  • Required clamping force (kN)
  • Production cycle time (seconds)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Misalignment-induced wear
Cause: Improper assembly, thermal expansion mismatches, or fixture settling leading to uneven load distribution and accelerated component degradation.
Corrosion and pitting
Cause: Exposure to moisture, chemical residues from molding processes, or inadequate material selection causing surface deterioration and loss of dimensional accuracy.
Maintenance Indicators
  • Visible flashing or irregular part dimensions indicating fixture misalignment or wear
  • Unusual squeaking, grinding, or vibration during operation signaling mechanical stress or component failure
Engineering Tips
  • Implement laser alignment verification during installation and periodic inspections to maintain precise fixture positioning
  • Apply protective coatings or select corrosion-resistant materials for critical components, coupled with regular cleaning protocols to remove process residues

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ANSI B94.6 - Cutting Tools DIN 16742 - Plastics - Moulded Parts

Quoted from the published standard.

Manufacturing Precision
  • Bore: +/-0.02mm
  • Flatness: 0.1mm
Quality Inspection
  • Dimensional Verification with CMM
  • Dye Penetrant Test for Surface Defects
Technical documentation
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Manufacturing capability
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Inspection readiness
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Manufacturers of Mold Assembly / Fixture

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Frequently Asked Questions

What is the primary function of a Mold Assembly/Fixture?

The primary function is to securely hold and position the mold halves during silicone injection, curing, and demolding, ensuring precise alignment and proper closure to produce consistent parts with minimal defects.

What materials are commonly used for this fixture?

Common materials include steel and aluminum alloy, with material grades such as S45C–S55C and surface hardness of HRC 40–50, as referenced in the directory. These are reference values and should be confirmed for the specific model.

What are the typical operating parameters?

Typical parameters include clamping force of 50–200 kN, operating pressure of 0.6–1.0 MPa, operating temperature of -20 to 120°C, positioning accuracy of ±0.02 mm, and ingress protection of IP54–IP65 (per IEC 60529). These are directory reference ranges.

How should I verify the specifications for my application?

You should verify all model-specific values and standards with the legal manufacturer or supplier, as the directory provides reference ranges that may vary based on the actual model and application.

Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Related equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Silicone Molding Station
View system integration details

Industrial Ecosystem & Supply Chain Structure

Data Basis

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

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.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 12 October 2026

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