Molded Body: Wall Thickness 1.5-3.0 mm, Tolerance ±0.1 mm

Component Specifications

Definition

A molded body is a precision-engineered plastic component manufactured via injection molding processes, where molten polymer is injected into a mold cavity under high pressure and temperature. It forms the core structural framework of molded packages, providing dimensional stability, protection, and functional integration for housed components. Key characteristics include uniform wall thickness, controlled shrinkage, and specific surface finishes to meet mechanical and environmental requirements.

Working Principle

The molded body is created through thermoplastic injection molding: polymer granules are melted, injected into a closed mold under pressure (typically 500-2000 bar), cooled to solidify, and ejected. This process ensures repeatable geometry, tight tolerances, and efficient mass production. It integrates features like ribs, bosses, and snap-fits for assembly and functionality.

Materials

Engineering thermoplastics: Polycarbonate (PC), Acrylonitrile Butadiene Styrene (ABS), Polyamide (PA6, PA66), Polypropylene (PP), or glass-filled variants for enhanced strength. Material selection depends on mechanical properties (e.g., tensile strength: 40-80 MPa), thermal resistance (up to 120°C), and chemical compatibility.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Tolerance	±0.1 mm
Shrinkage Rate	0.5-1.5%
Surface Finish	SPI A-2 (glossy) to D-3 (textured)
Wall Thickness	1.5-3.0 mm
Injection Pressure	800-1500 bar

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 294, ISO 20457, DIN 16742

Parent Products

This component is used in the following industrial products

Molded Package

A protective housing for photocoupler components formed through injection molding processes.

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Engineering Analysis

Risks & Mitigation

Dimensional inaccuracy due to mold wear
Material degradation from overheating
Stress cracking under mechanical load
Inconsistent quality from process variability

FMEA Triads

Trigger: Inadequate mold maintenance leading to wear
Failure: Dimensional deviations beyond tolerance limits
Mitigation: Implement regular mold inspection and cleaning schedules; use hardened steel molds; monitor production for early signs of wear.

Trigger: Improper injection parameters (e.g., high melt temperature)
Failure: Material degradation causing weak structural integrity
Mitigation: Optimize process settings via DOE (Design of Experiments); install real-time temperature sensors; use thermal-stable polymers.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Geometric dimensioning and tolerancing per ISO 1101; typical tolerance ±0.1 mm for critical dimensions

Test Method

Dimensional verification via CMM (Coordinate Measuring Machine); mechanical testing per ISO 527 for tensile strength; thermal cycling tests per IEC 60068 for environmental resistance

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Molded Body

Manufacturer profiles associated with Molded Body.

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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

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Processing Aids

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Frequently Asked Questions

What are the common defects in molded bodies and how to prevent them?

Common defects include sink marks (from insufficient cooling), warping (due to uneven shrinkage), and flash (excess material at mold seams). Prevention involves optimizing mold design (e.g., uniform wall thickness), controlling process parameters (melt temperature, injection speed), and using appropriate materials with consistent flow properties.

How does material selection impact the performance of a molded body?

Material choice affects mechanical strength, thermal stability, and chemical resistance. For example, polycarbonate offers high impact resistance, while polyamide provides better wear resistance. Glass-filled materials enhance stiffness but may increase brittleness. Selection is based on application requirements like load-bearing capacity and environmental exposure.

Data Basis

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

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.

Molded Body