Structured Manufacturing Data (2026)

Clamping Frame

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Clamping Frame used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Clamping Frame is characterized by the integration of Frame Body and Clamping Mechanism. In industrial production environments, manufacturers listed on CNFX commonly emphasize Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A structural component that securely holds and positions the plastic sheet during the vacuum forming process.

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Product Specifications

Technical details and manufacturing context for Clamping Frame

Definition
The clamping frame is a critical component of an industrial vacuum forming machine that firmly grips the edges of the plastic sheet material, maintaining it in a taut, flat position throughout the heating and forming cycles. It ensures uniform material distribution and prevents wrinkles or distortions during the vacuum forming operation.
Working Principle
The clamping frame uses mechanical pressure (typically via pneumatic or hydraulic clamps) to secure the plastic sheet around its perimeter. Once closed, it creates a sealed boundary that allows the vacuum system to effectively draw air from beneath the sheet, forcing it to conform to the mold shape when heated to its forming temperature.
Common Materials
Steel, Aluminum alloy
Technical Parameters
  • Frame dimensions (length × width) determine maximum sheet size capacity (mm) Customizable
Components / BOM
  • Frame Body Part
    Main structural support that defines the forming area
    Material: Steel
  • Clamping Mechanism
    Applies pressure to secure plastic sheet edges
    Material: Steel
  • Sealing Gasket Part
    Creates airtight seal between frame and plastic sheet
    Material: Silicone rubber

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Clamping Frame.

vacuum forming clamping frame plastic sheet holding frame steel clamping frame for machinery aluminum alloy vacuum forming frame industrial clamping mechanism for plastic molding

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 1 bar vacuum pressure (atmospheric to full vacuum)
other spec: Frame deflection < 2mm under full vacuum load
temperature: Ambient to 150°C (typical plastic forming range)
Media Compatibility
✓ ABS plastic sheets ✓ Polycarbonate sheets ✓ Acrylic (PMMA) sheets
Unsuitable: Corrosive chemical environments (acids, strong solvents)
Sizing Data Required
  • Maximum sheet dimensions (width x length)
  • Sheet thickness range
  • Required clamping force per linear meter

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Fatigue cracking
Cause: Cyclic loading from repeated clamping/unclamping operations leading to stress concentration at weld joints or sharp corners
Frame distortion/warping
Cause: Over-torquing of clamping bolts causing uneven stress distribution, or thermal expansion/contraction from environmental temperature variations
Maintenance Indicators
  • Visible cracks or deformation in frame structure
  • Abnormal creaking or popping sounds during clamping operations
Engineering Tips
  • Implement torque-controlled tightening procedures using calibrated tools to prevent over-stressing
  • Apply protective coatings to vulnerable areas and conduct regular dimensional inspections to detect early distortion

Compliance & Manufacturing Standards

Reference Standards
ISO 2768-1: General tolerances for linear and angular dimensions ANSI B4.1: Preferred Limits and Fits for Cylindrical Parts DIN 8570: General tolerances for welded structures
Manufacturing Precision
  • Parallelism of clamping surfaces: 0.05mm per 100mm
  • Bolt hole diameter: H7 tolerance (e.g., 10mm +0.015/0mm)
Quality Inspection
  • Dimensional verification with CMM (Coordinate Measuring Machine)
  • Magnetic Particle Inspection for weld integrity

Factories Producing Clamping Frame

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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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Frequently Asked Questions

What materials are available for the clamping frame?

Our clamping frames are manufactured using high-grade steel or aluminum alloy, offering durability and corrosion resistance for industrial vacuum forming applications.

How does the clamping frame secure plastic sheets during vacuum forming?

The frame uses a precision clamping mechanism with sealing gaskets to create an airtight seal around the plastic sheet, preventing air leaks and ensuring uniform pressure distribution during the vacuum forming process.

What maintenance does the clamping frame require?

Regular inspection of the clamping mechanism and sealing gaskets is recommended. Clean surfaces after use and lubricate moving parts periodically to ensure optimal performance and longevity.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Machinery and Equipment Manufacturing.

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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