Super-Ingenuity (SPI)

CNC Machining & Injection Molding — DFM/Moldflow Support, CMM Inspection, Prototype to Production Solutions.

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Injection Mold Tool Acceptance Criteria: Pass/Fail Gates for Tool Approval

Copy-ready approval checklist covering run-off stability (4–8h), CTQ CMM/FAI, Cpk targets, and handover pack—built for export mold production sign-off.

Injection mold tool acceptance inspection showing 4-cavity mold, cooling lines, and validation checkpoints for run-off stability
≥ 1.33 Target Cpk CTQ under locked process window
< 0.01mm Tooling Tolerance Critical inserts & steel features
100% Cycle Time Hit Validated at steady-state run-off
500k+ Steel Life Class 101 per resin datasheet

Tool Approval Pass/Fail Gates

  • Dimensional Validation: CMM report per cavity; sample size based on tolerance standards.
  • Process Stability: 4–8h continuous run-off; cycle time variance ≤ 5%; no manual intervention allowed.
  • Capability Analysis: 32–50 shot statistical verification; Cpk ≥ 1.33 on all CTQ dimensions.
  • Thermal Uniformity: IR check confirms mold ΔT ≤ 2°C across critical cavity areas.

Handover Documentation Pack

FileFormatPurpose
Final 3D AssemblySTEPAs-built tool verification
Steel CertificatesPDFHardness & traceability
Scientific Process SheetPDFLocked process window data
Maintenance SchedulePDFOEE & downtime control

Explore the full development workflow →

Kevin Liu Mold Division Principal reviewing tool acceptance criteria

Reviewed by Kevin Liu — Mold Division Principal

20 years focus on export tooling validation, CTQ metrology, and Cpk capability for automotive and medical programs. Kevin ensures every tool meets Quality Assurance gates before shipping.

Ready to Define Your Tool Approval Gates?

Send your CTQ drawing and resin grade. We’ll return a run-off plan, CMM checklist, and pass/fail criteria for sign-off. NDA available.

Request Tool Approval Gate Plan

What Tool Approval Means: A Documented Pass/Fail Gate for Stable Production

Tool Approval vs. Sample Approval

In high-precision manufacturing, "one good part" does not mean the tool is approved. While sample approval confirms a batch meets drawing specs under a specific setup, tool approval proves the mold can repeatably produce CTQ-compliant parts under a defined process window (resin, mold temp, injection profile) with verified mechanical reliability and a documented handover package for mass production.

The 4-Pillar Acceptance Scope (Checklist)

  • Part Validation (CTQ): CTQ list + CMM/FAI report per cavity, defined conditioning & sample size.
  • Mold Function: Dry-cycle video, ejection reliability, sealing/leak test, and cooling flow/ΔT check.
  • Process Stability: 4–8h steady-state run-off with locked process window; cycle time & weight variance within limits.
  • Handover Package: As-built 2D/3D data, steel & heat-treat certs, validated process sheet, and PM plan.
Tool approval pass fail gate showing CMM inspection report, run-off monitoring, and handover document pack for injection mold validation
Artifact: Verification Station & Document Pack Review

T0: Mechanical Check

First shots to verify mold movements and gate balance. No textures applied.

Evidence: Dry-cycle video + leak test + ejection record.

T1: Dimensional Tuning

Refining steel based on CMM. Focus on shrinkage compensation and fitment.

Evidence: CTQ CMM report + steel-safe change log.

T2: Cosmetic & Stability

Final texture application and run-off to verify cycle time and part ejection reliability.

Evidence: Run-off log + weight drift matrix + defect limit.

Acceptance Inputs: Lock Boundary Conditions Before T0 (Avoid Sign-Off Disputes)

In high-tolerance programs, mold acceptance is binary (pass/fail) and must be based on pre-defined engineering inputs. If boundary conditions are not locked before T0, dimensional and cosmetic results become negotiation points instead of validation evidence.

We mandate locking these inputs before steel cut: drawing revisions with GD&T datums, CTQ lists with metrology methods, resin TDS/drying specs, and machine boundary conditions (tonnage, mold temp). This ensures technical certainty and protects the export tool approval gate.

Acceptance inputs for mold validation showing CTQ GD&T map, resin TDS drying specs, sampling plan, and machine boundary conditions
Artifact: Locked Engineering Data Package & Metrology Plan

1. Geometric & Metrology Framework

Before steel cut, we lock the CTQ (Critical to Quality) list and primary datums. Pass/Fail trigger: If datums or inspection standards differ from customer assembly checking fixtures, acceptance is on hold until the scheme is aligned.

2. Material & Shrinkage Assumptions

Acceptance depends on the specific resin grade and moisture analysis. Pass/Fail trigger: Any resin grade change or process window deviation without written approval invalidates the sample set.

3. Cosmetic Grading (A/B/C Surfaces)

A-Surfaces require strict D65 lighting and limit samples. Pass/Fail trigger: Cosmetic judgment is invalid without physical boundary parts and defined viewing conditions (light source, distance, time).

4. Sampling Protocol & Sample Plan

Validation requires "Steady-State" samples (1-2h equilibrium). The FAI / CMM report requirements must specify sample size (e.g., 5 sets for FAI, 32-50 shots for Cpk).

5. Boundary Conditions (Machine Specs)

The tool is designed for a specific press tonnage and mold temp range. Pass/Fail trigger: If CTQ is only achieved by exceeding tonnage or injection capacity limits, the design fails approval for mass production.

Acceptance Item Owner Locked Before Common Failure Pattern Stop Condition
GD&T / CTQ Map Customer Steel Cut Undefined datums → Gauge R&R failure Datum conflict
Material TDS Supplier DFM Freeze Equivalent resin used → Shrink shift Grade mismatch
Limit Samples Quality T1 Trial Subjective judgment → Sign-off delay No physical ref
Metrology Method Engineering T0 Shot Calipers on soft plastic → False pass Method drift

H2-3. Pre-Run Mold Checks: Engineering Readiness Prior to First Shot

A "First Shot" is not merely the start of sampling; it is a critical test of the tool's mechanical integrity. Before the mold is mounted to the press, our engineers perform a rigorous Static Acceptance. This preemptive audit prevents tool damage, reduces downtime, and ensures that injection mold quality control standards are met from T0.

By verifying mechanical clearances, cooling circuit pressure, and sensor logic, we eliminate "human-error" variables, allowing the sampling phase to focus purely on process optimization and part quality.

Engineers performing cooling circuit verification and mold pressure test

Critical Sub-System Verifications

1. Parting Line & Shut-off Integrity: We map the flash risk by checking the blueing or carbon-paper transfer on all primary shut-offs. This ensures zero-gap fitment, particularly around complex sliders and lifters.

2. Alignment & Guidance Systems: Leader pins, bushings, and wear plates are inspected for lubrication and seating. Using our precision equipment list, we verify that alignment tolerances are within 0.005mm to prevent uneven cavity wear.

3. Cooling Circuit Verification: Every circuit undergoes a leak and pressure test (typically 6-8 bar). We verify flow directions against the mold engraving to ensure that "In" and "Out" ports match the DFM thermal analysis.

4. Ejection Safety & Stroke: We manually actuate the ejection system to check for stroke limit interference. Special attention is given to thin-rib areas where ejection pins might cause stress whitening or part deformation.

5. Venting Baseline: Our engineers verify end-of-fill vents and rib/boss vent strategy. Clogged or undersized vents are the #1 cause of burns and gas traps during the high-speed T1 phase.

6. Hot Runner Readiness: For hot runner systems, we perform a cold-resistance check on all zones, verify tip sealing heights, and ensure there is no lead-wire interference before heating.

Inspection Item Critical Checkpoint Required Evidence Status
Hydraulic/Pneumatic Slide & Lifter sensor logic; sequence control. Video of dry-cycle functionality. OK/NG
Cooling System Pressure drop & flow rate per circuit. Pressure test log & infrared mapping. OK/NG
Ejection Plate Return pin clearance & spring tension. Physical stroke measurement. OK/NG
Venting Depth Depth measurement at last-fill areas. Depth Gauge / Feeler gauge data. OK/NG

Run-Off Test (Steady-State): Proving Production Stability Beyond “One Good Part”

Defining the Run-Off Protocol

A run-off test is a steady-state production simulation used to prove the mold can repeatedly produce CTQ-compliant parts without manual parameter changes. The tool must reach thermal equilibrium first, then run continuously (typically 4–8 hours for production tools) while logging cycle time, pressures, and part weights to detect drift.

Our engineers use this export tool approval run-off gate to eliminate risks identified during initial mold flow analysis, ensuring physical tool performance correlates exactly with the digital twin.

Setup: The Steady-State Rule

Warm-up typically requires 30–50 cycles of scrap (varies with mold mass and resin). Sampling starts only after the process reaches a stable plateau. Moisture control must strictly follow the resin TDS limits, and the locked process window must maintain a mold temperature delta ($\Delta T < 2^{\circ}C$) across all cavities.

Steady-state run-off test showing injection molding machine monitoring of cycle time and part weight trend for tool approval
Artifact: Real-time Cycle Stability & Weight Trend Monitoring

Shot Count & Data Logging

Prototype tools require a 2-hour run (~200 shots), while medical/automotive production tools mandate a 4-to-8 hour continuous run. Minimum log fields: Cycle time, melt/mold temps, peak injection pressure, screw position (cushion), and part weight. Missing logs or manual edits invalidate the dataset.

Multi-Cavity Balance Check

We verify fill balance using a "Short-Shot Map" at 90–95% fill. Acceptance threshold: Cavity-to-cavity weight spread $\le 5\%$. If exceeded, multi-cavity balance validation must be corrected before Cpk sampling begins.

Run-Off Acceptance Log Template (Steady-State Window)
Engineering Parameter Target (Baseline) Source Allowable Deviation ($\sigma$) Acceptance Status
Cycle Time (sec) DFM Agreed Cycle Time $< 0.2s$ Pass / Fail / Hold
Melt Temperature TDS Range (Midpoint) $\pm 3^{\circ}C$ Pass / Fail / Hold
Mold Temperature Setpoint $\pm$ Tolerance $\pm 2^{\circ}C$ Pass / Fail / Hold
Hold/Pack Time Gate Freeze + 1s $\pm 0.1s$ Pass / Fail / Hold
Part Weight (g) Reference Weight $< 0.5\%$ Pass / Fail / Hold

Disqualification Criteria (Pass/Fail Red Flags)

Manual Adjustments

Any change to temperature, pressure, or timers during the run to "fix" a dimension results in immediate failure of the run-off gate.

Over-Packing Risk

If CTQ can only be met by exceeding the agreed hold pressure window, the process is unstable and fails mass production approval.

Cavity-to-Cavity Drift

Weight spread $> 5\%$ or inconsistent CTQ trends between cavities during the steady-state window indicates tool system failure.

Dimensional Acceptance (CMM/FAI): CTQ Evidence, Conditioning Rules & Cpk Targets

CMM dimensional acceptance requires a CTQ-based measurement plan with locked datums/fixtures, per-cavity FAI/CMM evidence, defined conditioning rules, and capability targets (typically $Cpk \ge 1.33$) collected under steady-state production conditions.

Dimensional acceptance is the technical sign-off gate that confirms the tool can meet CTQ dimensions repeatably—not just visually. Approval requires a per-cavity CMM/FAI report with locked datums/fixtures adhering to defined injection mold tolerance standards (ISO/SPI/automotive).

Measurement Strategy & CMM Deliverables

Our Measurement Plan prioritizes CTQs and primary datums as defined in the DFM. A compliant report must include: CTQ ID, datum scheme, nominal/actual/deviation, sample size, per-cavity results, and conditioning method/time (e.g., 24h @ $23^{\circ}C/50\%RH$). Undefined methods or missing conditioning rules put dimensional sign-off on HOLD.

CMM dimensional acceptance inspection showing CTQ measurement setup and FAI report for injection mold tool approval
Artifact: CMM Per-Cavity Verification & FAI Report Audit

Shrinkage vs. Tooling Calibration

Decision Rule: Global uniform offsets indicate shrink assumption issues, while localized errors at specific features indicate tooling calibration needs. We apply a steel-safe change workflow, documenting all steel edits with CTQ impact notes before the next gate.

Warpage & Capability Evaluation

Final approval requires $Cpk \ge 1.33$ on defined CTQs, collected under steady-state run-off conditions. Parts are measured only after the agreed conditioning method (e.g., 24h stabilization) to account for post-mold creep.

CTQ Acceptance Template (Inspection Method & Sample Size)
CTQ ID Description Measurement Method Sample Size (per Cavity) Conditioning Acceptance Criteria
DIM-01 Primary Mating Diameter CMM / Air Gage 32–50 Shots (Cpk) 24h @ $23^{\circ}C/50\%RH$ Tol $\pm X$ / $Cpk \ge 1.33$
DIM-05 Flatness (Sealing Surface) Optical / CMM 5 Shots (FAI) As Agreed $< 0.10$ mm / Gage Pass
DIM-09 Thread Pitch / Depth Go/No-Go Gauge 100% (T1 Trial) Standard Gage Fit Pass / Fail
Dimensional Failure Pattern Likely Root Cause Engineering Corrective Action
Uniform Undersize Incorrect Shrink Assumption Recalculate resin shrink; Adjust steel safe amounts; Check melt/mold temp.
Elliptical Distortion Gate Location / Fill Imbalance Modify gate size/location; Optimize packing profile (Scientific Molding).
Localized Warpage Cooling Imbalance ($\Delta T$) Audit cooling system design (ΔT balance); Validate conformal circuits.
Ejection Stress Marks Poor Draft / Ejection Force Increase draft angle; Increase ejection pin surface area/distribution.

Cosmetic Acceptance Standard: A/B/C Surface Zones, Viewing Conditions & Defect Limits

Cosmetic acceptance is defined by A/B/C surface zones, locked viewing conditions (D65 light, lux, distance, time), and a defect-limit matrix. Borderline cases are resolved only by limit samples—approved boundary parts used as the technical benchmark for mass production inspection.

Cosmetic acceptance must be repeatable, not subjective. We classify surfaces into Zone A/B/C and lock inspection environments. Hold condition: If viewing conditions and limit samples are not defined, cosmetic sign-off is on hold regardless of part appearance.

Standard Inspection Environment (Example):
  • Light Source: D65 Standard (6500K)
  • Intensity: $1000$ – $1200$ Lux at part surface
  • Distance: 45 cm (Zone A) / 60 cm (Zone B)
  • Inspection Time: Max 10 seconds per primary surface
  • Viewing Angle: 90° Normal (No grazing light unless specified)
Cosmetic acceptance inspection under D65 light using limit samples and A B C surface zones for injection molded parts
Artifact: D65 Inspection Station & Limit Sample Comparison

Tooling-Driven vs. Process-Driven Logic

  • Tooling-Driven: Defect stays in the same location across parameter changes. Action: Investigate steel, texture, or vent edges.
  • Process-Driven: Defect shifts or disappears with packing/temp changes. Action: Optimize flow marks and weld lines via scientific molding.

The "Cosmetic Compromise" Rule

In difficult geometries or high-fill resins, a compromise may be agreed only with written criteria. The result must be converted into a Limit Sample. Fail condition: decisions without physical boundary parts are invalid for mass production sign-off.

Applies to: Agreed resin grade, approved texture, and defined D65/Lux conditions.
Defect Type Zone A (Primary Visible) Zone B (Semi-Visible) Zone C (Hidden/Internal)
Flash / Burrs Not Permitted (0mm) Max 0.05mm (Non-sharp) Max 0.15mm (Measured)
Sink Marks Not Permitted (>$0.01$ mm) Max 0.05mm (Not shadow) Accepted if functional
Weld Lines No Hairline / Visible Breaks Accepted (Smooth, No "V") Accepted if no interference
Gate Vestige Flush to -$0.05$ mm Max +$0.10$ mm Protrusion Max +$0.30$ mm Protrusion

Download the Full Cosmetic Defect Troubleshooting Decision Guide →

Quality Evidence Package (Handover Pack): The Audit-Ready “Golden File” for Tool Approval

Tool approval is not complete until the Quality Evidence Package is delivered. This “Golden File” makes the manufacturing process repeatable, traceable, and audit-ready for mass production. Hold condition: Missing evidence (FAI/ISIR, process sheet, or traceability certs) puts final sign-off on HOLD even if physical samples are acceptable.

The export mold handover pack aligns with IATF 16949 and ISO 9001 workflows, ensuring that every tool has a validated digital twin for future failure traceability. Review our quality assurance inspection system for full metrology standards.

Tool approval golden file handover package showing FAI ISIR report, ballooned drawing, process sheet, and traceability certificates
Artifact: Final Quality Sign-off Document Package

FAI/ISIR Requirements for Molded Parts

The definitive record of dimensional compliance. Minimum contents: Ballooned drawing cross-reference, per-cavity results, conditioning rules, and CTQ pass/fail status. Gate: Final Approval.

Baseline Process Sheet (Scientific Molding)

Derived from steady-state run-off. Minimum contents: Locked window (melt/mold temp, injection profile), screw cushion position, and alarm limits (±5 bar peak pressure). Gate: Run-Off (T2).

Full Traceability: Resin & Steel Certs

Mandatory for medical/automotive sign-off. Minimum contents: Resin lot COA, masterbatch ratio, steel heat numbers, and heat-treatment hardness charts. Gate: Mold Assembly.

Gauge Control & Multi-Cavity Mapping

Ensures cavitation balance. Minimum contents: Cavity ID marking rules, gauge R&R results for fixtures, and calibration certs. Hold: Data not separated by cavity ID.

Document Type Doc ID / Revision Required Gate Acceptance Status
FAI / ISIR Report QEP-FAI-001 T1 / Final Provided / Hold
Scientific Process Sheet QEP-SPS-001 Run-Off (T2) Provided / Hold
Material Cert (COA) QEP-MAT-REF Every Trial Provided / Hold
Steel & Heat Treat Certs QEP-STL-REF Assembly Provided / Hold
Final 3D As-Built Data CAD-AB-001 Handover Provided / Hold
Maintenance Schedule PM-SCH-001 Handover Provided / Hold

Tool Approval Sign-Off Matrix: PASS / CONDITIONAL / HOLD Rules + Closure Evidence

Tool sign-off is a binary decision based on documented evidence, not subjective opinions. The export tool approval sign-off rules defined below eliminate ambiguity between tool-shop validation and mass production readiness.

Rule: If the process window is too narrow or the material/geometry combination is inherently unstable, the correct decision is HOLD, even if a few isolated samples measure in-spec.

Note: If CTQ + cycle time targets cannot be achieved within a stable window, evaluate if injection molding is the appropriate choice for this specific design before further steel rework.
Tool approval sign-off decision matrix showing PASS CONDITIONAL HOLD status with required evidence for mold validation
Artifact: Final Sign-off Matrix & Verification Evidence Audit
Final Status Acceptance Criteria (Must be simultaneously met) Next Step / Outcome
PASS
  • All CTQ dimensions within spec with $Cpk \ge 1.33$ (per cavity).
  • Steady-state run-off $\ge 4$ hours with zero manual parameter changes.
  • Cosmetic acceptance per A/B/C matrix or approved limit samples.
  • Complete Evidence Package (FAI/ISIR + Process Sheet + Traceability).
 Tool released for production. Handover pack issued. Baseline process locked.
CONDITIONAL
  • Minor Zone B/C cosmetic deviations with documented limit samples.
  • CTQs in spec but pending 32–50 shot capability data (Cpk log).
  • Non-critical documentation pending with a defined Doc ID + Deadline.
 Closure Plan Required: Define evidence list + owner + deadline. No production release without closure sign-off.
HOLD / FAIL
  • Flash at primary shut-offs; Cooling circuit leak or flow imbalance.
  • Cycle time exceeds DFM target by $> 10\%$.
  • Unstable CTQ (drift across shots) or ejection sticking during run-off.
  • Undocumented resin substitution or regrind usage.
 Stop. Root Cause Analysis required. Re-test after corrective action with updated evidence pack (New Revision).

Corrective Action & Closure Evidence Workflow

A "Hold" status triggers an immediate engineering loop. Closure requires version-controlled proof of change:

  • Steel Change: Updated as-built CAD + New CMM/FAI report for impacted CTQs.
  • Process Tuning: Updated process sheet + Run-off stability trend + DOE summary.
  • Cooling Fix: Flow/$\Delta T$ evidence + Cavity balance re-check records.

Export Mold Handover Protocol: Rust Prevention, Crating, Spares & Audit-Ready Documents

The final gate of tool approval is shipment-ready handover. Export molds must survive 4–6 weeks of sea transit and arrive ready for installation without corrosion or documentation gaps. Release rule: Shipment is only authorized after preservation evidence, ISPM-15 packing records, and the full handover pack (Digital Twin) are verified.

The Export mold production & handover system treats the shipping crate as part of the tool’s quality system—treated with the same rigor as cavity steel and traceability. This is vital when sourcing injection molds from China.

Export injection mold crating for shipment showing ISPM-15 wooden crate and secured strapping for overseas transport
Evidence: ISPM-15 Crate + Internal Bolting + VCI Preservation
Handover Task Standard Requirement Evidence ID / Record
Surface Preservation VCI Rust-inhibitor (LPS-3/Fuchs) applied to all polished steel. SHIP-01: Cavity Photo Log
Circuit Moisture Control Water channels blown dry + desiccant + port blanking caps. SHIP-02: Pressure Blow Log
Security & Locking Primary mold locks + safety bars + internal crate bolting. SHIP-03: Video Verification
Maritime Crating ISPM-15 Fumigated crate with vacuum-sealed vapor barrier. SHIP-04: Packaging Cert

Ready for Export Tool Handover Planning?

Send your tool specs and destination. We’ll return a shipment-ready checklist (preservation, crate, spares, and document pack) for your engineering sign-off.

Request Export Handover Checklist →

11. Industrial Mold Acceptance Templates (Downloadable)

These templates standardize tool approval evidence (run-off logs, FAI/ISIR structure, and sign-off gates) to reduce disputes, prevent rework loops, and speed up release for export tooling programs.

📋

Tool Approval Checklist (PDF)

  • 52-Point Static Mechanical Audit
  • Cooling System Pressure Validation
  • Interlocking & Safety System Verification
  • Used at Gate: Static Acceptance
Request Checklist (PDF)
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Run-Off Trial Record (Excel)

  • Cycle Time Stability & Trend Log
  • Scientific Injection Molding (SIM) Data
  • Per-Cavity Weight & Short-Shot Map
  • Used at Gate: Run-Off (T2)
Get Log Template (Excel)
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FAI/ISIR Reporting Framework

  • CTQ Dimensional Tolerance Mapping
  • Cp/Cpk Statistical Capability Worksheets
  • Conditioning Rules (Time/Temp/RH)
  • Used at Gate: Dimensional Sign-off
Request FAI Template

Request a Project-Specific Tool Approval Plan

Send your CTQ drawing, resin grade, and target cycle time to our export mold engineering team. We will return a customized approval plan including run-off duration, CMM/FAI scope, and handover checklist.

  • GD&T Callouts: Ballooned prints alignment.
  • Resin Specs: Grade-specific TDS & shrinkage.
  • Cosmetic Mapping: A/B/C zone limit samples.
  • OEE Capability: production molding efficiency targets.
Request Tool Approval Plan → Includes Free DFM & Moldflow Cooling Review
Downloadable tool approval templates showing run-off log, FAI ISIR framework, and checklist used for injection mold acceptance
AUDIT-READY ASSETS

Technical FAQ: Injection Mold Acceptance & Sign-off Protocols

What is injection mold acceptance criteria for tool approval?

Injection mold acceptance criteria is a documented pass/fail protocol proving the tool can repeatedly produce CTQ-compliant parts at the agreed cycle time under a locked process window. Approval requires verified evidence across dimensions (CMM/FAI), cosmetics (A/B/C limits), mold functions (cooling/ejection), and run-off stability (Cpk trends) plus a complete handover package.

Learn more: tool approval gate for export tooling (Hub B) →

What is the difference between T1 and T2 mold acceptance?

T1 focuses on functional verification and "steel-safe" dimensional evidence; T2 validates cosmetic textures, Cpk stability, and release-ready documentation. Our mold development process ensures all engineering changes from T1 are verified before final mass production sign-off.

How many shots are needed for a mold run-off test?

Typical run-off is defined by steady-state time: ~2 hours (~200 shots) for prototype intent, and 4–8 hours for production intent tools. The key is logging cycle time, temperatures, pressures, and part weight without manual parameter changes to confirm the steady-state run-off rules are met.

Can a mold be approved if one sample meets dimensions?

No. One compliant sample does not prove tool approval. Approval requires evidence of repeatability under steady-state run-off, per-cavity CTQ evidence (CMM/FAI), and capability targets (typically $Cpk \ge 1.33$) under controlled boundary conditions (tonnage, mold temp, and injection profile).

Which dimensions must be checked by CMM vs. gauges?

Complex GD&T datums and true position features require 3D CMM inspection, while simple go/no-go features like thread depths or hole diameters use calibrated gauges. Ensure all tolerance & inspection standards are aligned with the customer's assembly checking method before sign-off.

What Cp/Cpk target is typical for critical dimensions (CTQs)?

Industrial standards mandate $Cpk \ge 1.33$ for production tools, measured under steady-state conditions with a locked process window. Our process window validation for Cpk ensures dimensions are centered within the tolerance band to prevent scrap due to normal variation.

How do you define cosmetic defect limits for A-surface parts?

Cosmetic limits are defined by Surface Zones (A/B/C) and are only valid with locked viewing conditions (D65 light, 1000 lux, distance, time) and an approved limit sample for borderline flow marks and weld lines.

What documents are in a mold handover package?

A professional mold handover package typically includes: FAI/ISIR & CMM reports (per cavity), validated process sheet (locked window + alarm limits), final as-built 2D/3D data, steel/heat-treat certificates, material COA/traceability, and a preventive maintenance schedule with spares list. This "Digital Twin" is mandatory for export mold handover system sign-off.

Who owns what in tool acceptance (Customer vs. Supplier)?

The customer owns the CTQ definitions, datum schemes, and assembly requirements; the supplier owns the execution of the validation protocol and providing auditable evidence. Final sign-off is a joint milestone proving the tool meets the agreed export tooling release rules.

What is the difference between FAI and ISIR?

FAI (First Article Inspection) is the initial dimensional record of a single batch; ISIR (Initial Sample Inspection Report) is a more rigorous automotive-grade package requiring process capability (Cpk) and material traceability evidence. Both require a ballooned drawing cross-referenced with per-cavity CMM data.

What are the common fail triggers for tool acceptance?

Common fail triggers include CTQ drift across shots, flash at primary shut-offs, cooling imbalance-driven warpage, cycle time creep, or undocumented resin changes. Our common injection mold fail triggers list helps identify these risks during the run-off phase.

What packing steps are mandatory before shipment release?

Shipment release requires VCI preservation, vacuum-sealed barrier protection, and ISPM-15 fumigated crating evidence. No tool is shipped until the export mold shipping-ready protocol (Hub B) is completed with photos of oiled cavities and dry water circuits.

Establish Your Tool Approval Framework

Send your drawing revision, CTQ list, and resin grade. Our engineering team will return a Project-Specific Approval Plan including a CMM/FAI measurement strategy, steady-state run-off setup, and defect limit matrix—ensuring your sign-off is based on evidence, not opinions.

To start, we need:
  • Drawing Revision (PDF/STEP)
  • CTQ List (or we define datums)
  • Resin Grade & TDS
  • Target Cycle Time & OEE
Get My Tool Approval Plan → Best if you have a finished drawing.
Review My CTQ List (FAI Scope) We'll flag datums & Cpk targets.