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Senior Chinese tooling engineer auditing a multi-cavity mold insert against a phase-gate checklist and steel certifications.

Engineering Gate Review: Verifying mold integrity before shipment release.

Injection Mold Manufacturing Process Checklist: 6 Phase Gates, Required Records & Verifiable Acceptance

Stop accepting verbal progress updates. This supplier-audit-ready checklist empowers tooling and sourcing teams to execute strict release/hold discipline based on hard engineering evidence. From RFQ and DFM freeze through T0/T1/T2 trials and final Tool Book handover, every build stage is controlled by measurable gate criteria instead of milestone claims alone.

Role-Based Decision Support: Purpose-built for tooling engineers and supplier quality (SQE) teams who must validate design release readiness, machining accuracy, and trial traceability before authorizing tool release.

Verified Proof Records: DFM Markup, Steel Certs, HT Logs, T1 Trial Sheets, FAI & CMM Reports.

  • ✓ 6 gated phases with pass/fail logic to preempt downstream failure modes.
  • ✓ Acceptance non-negotiables covering mechanical, dimensional, and dossier integrity.
  • ✓ Audit-ready PDF specifically formatted for supplier review and handover meetings.

Next Project Control Actions:

What Is an Injection Mold Manufacturing Process Checklist?

Definition

An injection mold manufacturing process checklist is a phase-gated control document used to authorize gate release based on reviewable evidence—from RFQ and DFM through machining, assembly, T0/T1/T2 trials, and final tool acceptance. It ensures build progress is justified by verifiable records, not milestone claims alone.

Typical proof records include: DFM approval, steel certs, heat-treatment logs, CMM reports, trial sheets, and final Tool Book dossiers.

What It Controls

  • Steel-Cut Release Control: Ensures no machining starts without signed-off DFM and revision-controlled tool drawings.
  • Manufacturing Record Completeness: Requires mill steel certifications, hardness reports, and intermediate CMM inspection data.
  • Tool Release Readiness: Defines the minimum technical criteria and records (FAI/Trial Sheets) needed before tool shipment.
  • Gate-Hold Risk Detection: Flags missing data, unresolved machining deviations, or handover gaps before they become acceptance disputes.

What It Does NOT Replace

This checklist controls the build sequence and phase-release logic; it does not replace the following project-specific documents:

Engineering Note: Buyers use this checklist to confirm build-stage readiness; they use downstream validation documents to confirm technical completeness.

Who Uses This Checklist — and Why It Matters for Supplier Validation

This framework synchronizes functional silos by ensuring engineering verifies intent, quality verifies evidence, and procurement verifies milestone legitimacy through a single, shared source of truth.

Role Verification Focus Verifiable Proof Record (Auditable)
Tooling Engineer Validates that Released Design Intent (gate/vent/cooling) is correctly carried into the mold build before steel cut. Approved DFM Report + Released Drawing Revision Packages
Supplier Quality (SQE) Confirms Data Integrity at each phase-gate. Ensures no tool moves forward without traceable material and dimension logs. Signed Phase Release Records + Attached Steel/HT Certs & CMM Inspection Logs
Sourcing / Procurement Verifies Milestone Legitimacy. Replaces verbal updates with signed evidence to justify payments and shipment release. Milestone Deliverable Log + Verified Proof of Gated Phase Completion
Program Engineer Tracks the T0–T2 Correction Loop. Ensures all non-conformances and ECNs are closed before mass-production handoff. Trial Issue Log + Closed ECN Records + Final Technical Release Approval

Audit Principle: A project milestone is not a "claim"; it is a verified status. Ensure your supplier provides the Required PPAP, FAI, and Quality Document Evidence defined by your specific industry phase-gate standards before authorizing release.

Critical Release Points: When to Execute This Checklist

To ensure supplier accountability, execute this checklist at the following release points. This prevents missing records, unresolved deviations, or unverified tool conditions from advancing into the next phase where costs and delays escalate.

1. Before Steel Cut (Design Freeze & Release)

Release Focus: CTQ Freeze, Gating Strategy, and DFM Closure

This is the absolute point of no return. Use the checklist to confirm that Critical to Quality (CTQ) parameters, resin-grade shrinkage, parting-line locations, and gate designs are signed off in the before steel cut injection mold risk checklist.

Risk: Proceeding with unverified design assumptions manifests as downstream steel rework, parting-line mismatch, or dimensional drift that compromises tool integrity.

2. During Machining and Assembly

Release Focus: Material Traceability, Hardness Logs, and Datum Integrity

Verify build progress through auditable data. Confirm mill steel certifications, heat-treatment hardness reports, and intermediate in-process dimensional logs for all cavity/core inserts before final assembly.

Risk: Without dimensional logs and hardness verification, assembly interference or shut-off failures are often hidden by undocumented manual grinding, reducing the tool's cycle life.

3. Before T0 / T1 / T2 Sampling Trials

Release Focus: Pre-Trial Mechanical Readiness and Safety Checks

Execute "pre-flight" verification records. Mandatory checks include cooling circuit leak tests at the agreed project test pressure, slide/lifter motion verification, ejector return safety, and circuit identification tagging before the tool is mounted to the press.

Risk: Discovering a mechanical interference or a blocked cooling channel while on the injection machine wastes critical press-time and introduces the risk of catastrophic tool damage.

4. Before Final Tool Acceptance & Shipment Release

Release Focus: Engineering Dossier Completeness and FAI Acceptance

Authorize shipment only when the Full Engineering Dossier is verified. This includes signed-off injection mold acceptance criteria checklist, final FAI/CMM data, spare-parts BOM, and revision-controlled Tool Book handover files.

Risk: Shipping a tool without traceable trial data and original steel/HT certs creates massive liability blind spots and complicates future maintenance at the production facility.

When This Checklist Is NOT Enough

This manufacturing checklist controls build-compliance and phase-release logic. It is not a substitute for documents used in part-level design approval, machine-level sampling records, or formal PPAP evidence. Use the following specialized documents when your decision requires:

Before Design Freeze

Review part geometry, draft, gating direction, and shutoff feasibility before steel cut—when changes are still design edits instead of steel rework.

injection molding DFM review checklist →

During Sampling (T0-T2)

Capture molding condition sheets, cavity-balance data, and issue logs to validate the tool under actual machine conditions.

T0 T1 T2 mold trial guide and checklist →

For Handover Approval

Execute shipment release based on specific mechanical integrity evidence, leak-test logs, blue-fit records, and tool dossier completeness.

For Regulated Programs

Medical (ISO 13485) or Automotive (IATF 16949) submissions requiring PPAP/FAI, traceability, and capability evidence where required by customer or program.

Engineering Note: PPAP approval is not granted by a passed build checklist alone. Validation packages evaluate dimensional evidence and, where required, capability or submission evidence, while this checklist focuses on build-compliance and phase-release readiness. Clear boundaries prevent document misuse during supplier audits.

Injection Mold Phase Release Matrix: 6 Gates for Supplier Verification

This matrix defines the release criteria for each mold-build stage. A phase moves forward only when required inputs are verified, key checks are passed, and the verifiable proof record is signed off by both the engineering and quality owners.

Phase Objective Required Inputs Key Checks Deliverable Verifiable Proof Record Gate Hold Risk (If Skipped)
P1: RFQ & Feasibility Feasibility Validation 3D CAD, CTQs, Resin Grade, Annual Volume Tonnage, Cavity Strategy, Tolerance Feasibility Technically Reviewed Quote Feasibility Review Record Quoting on unverified geometry or tonnage
P2: DFM & Design Design Freeze Shrinkage Data, Gating Strategy, Cosmetic Class Parting Line Logic, Venting, Cooling Efficiency Released Mold Drawing Revision Approved DFM & Design Sign-off Expensive steel rework due to design drift
P3: Machining & HT Structural Integrity Steel Traceability, Heat-Treat Spec Hardness Verification, EDM Integrity, Datum Control Finished Precision Components Steel Cert + HT Verification Log Undocumented steel failure or short tool life
P4: Assembly Mechanical Readiness Assembled Base, Fitting Components Leak Test (100 PSI), Blue-fit, Motion Safety Pre-trial Approved Mold Assembly Pre-trial Checklist Press downtime or catastrophic tool damage
P5: T0-T2 Sampling Process Validation Resin Lot, Drying Logs, DOE Parameters CTQ Measurement, Cavity Balance, Issue Log Valid Samples & Process Sheet Trial Record + FAI Report Unstable process windows or dimensional drift
P6: Final Acceptance Handover Integrity Spare Parts List, Final CAD, Maintenance SOP Handover Dossier & Tool Book Completeness Export-Ready Tooling Package Handover Dossier Index Liability blind spots or maintenance failure

Timeline Alignment Note: While phase gates ensure build quality, please review the mold build milestone schedule from design freeze to T0 to align these quality gates with your product launch critical path and trial windows.

Required Records by Phase: What Must Exist Before Release

A manufacturing gate is only as strong as the records behind it. Supplier progress must be released, held, or rejected based on objective evidence—not on milestone claims alone. Use the following tables to verify build integrity at each decision point.

Table 1: Phase-Gate Release & Hold Logic

Stage Acceptance Criteria Required Proof (Auditable Record) Gate Hold Trigger (Stop Work)
P1: RFQ Quoted assumptions reviewed RFQ Feasibility Review Record Quote issued without resin/tolerance/tonnage assumptions
P2: Design DFM alignment with part specs Approved DFM Record + Moldflow Summary Unresolved CTQs or missing design sign-off
P3: Machining Steel & Hardness verification Steel Mill Cert + HT Verification Log Steel starts before design release or missing lot numbers
P4: Assembly Mechanical readiness Leak Test Log + Pre-Trial Checklist No pressure-test record or no motion verification
P5: Trial Process window stability Trial Record + Molding Condition Sheet Out-of-spec CTQs with no correction closure
P6: Handover Tool & Dossier completeness Final Acceptance Record + Dossier Index Missing Tool Book, spare parts, or final CAD revision

Table 2: Buyer Review Focus (Red Flag Detection)

Supplier Claim Area What They May Say What Evidence Should Exist What to Reject
Tooling Steel "Steel is cut as per spec." Original mill certificate with heat traceability Steel cert with generic names or missing lot numbers
Component Fit "Assembly is ready for T1." Blue-fit / Shutoff-fit record + Cooling leak report Photos of mold without pressure-test data
Quality Check "Samples approved, ready to ship." FAI/CMM Dimensional Report + Issue Tracking Log Visual approval without dimensional verification

"A phase is not complete because the supplier says it is complete. A phase is complete only when the required deliverable exists, the acceptance criteria are met, and the supporting record can be reviewed."

Buyer Action: If the record does not exist, the phase must be held even if photos or verbal claims look acceptable.

Related Record-Review Documents:

Preview of injection mold audit PDF showing structured phase gates, proof-record fields, and engineering sign-off lines.

Preview: Phase-gate audit sheet with sign-off fields.

Download the Engineering Audit Version (PDF Checklist)

This PDF is the auditable version of the manufacturing process, specifically formatted for supplier gate reviews, tooling handover meetings, and permanent record retention. It provides a structured environment for cross-functional approval across the entire mold build cycle.

Critical Record Fields Included:

The document includes dedicated columns for Phase Owner, Release Criteria, Proof-Record Verification, and Sign-off Signatures to ensure that no stage is bypassed without verifiable engineering evidence.

PDF vs. Live Spreadsheet

Use this PDF for formal signed reviews and audit-trail retention. Use an editable spreadsheet for day-to-day action tracking, ownership updates, and live project coordination between engineering and SQE teams.

Download the Injection Mold Audit Checklist (PDF) →

Document Type: Static audit sheet | File Size: 185 KB | Format: Print-ready PDF

Engineering Note: Use the PDF for formal verification and sign-off meetings; use this HTML page for the full technical context and phase-gate logic explanation.

Phase-by-Phase Checklist with Evidence Logic

Use this release-review framework to evaluate entry conditions, required checks, and proof records before a mold build moves forward. Hold the phase if evidence is missing or deviations remain unresolved.

Phase 1: RFQ Intake & Feasibility

Release Target: Confirmed feasibility boundary and signed-off resin/shrinkage assumptions.

  • Entry Condition: Frozen CAD revision received and CTQs identified.
  • Key Checks: Undercut risk, press tonnage, and tolerance feasibility.
  • Verifiable Evidence: RFQ technical review log and quote boundary notes.
  • Hold if: Quote issued on unverified geometry or annual volume assumptions.

Phase 2: DFM Review & Mold Design

Release Target: Design freeze with manufacturable tooling logic and cooling circuit validation.

  • Entry Condition: Signed DFM report and part design revision lock.
  • Key Checks: Gating strategy, venting layout, and Moldflow summary (when required).
  • Verifiable Evidence: Released 3D mold design revision and signed DFM PDF.
  • Hold if: Parting line logic or gate locations are not finalized and signed by the buyer.
Machined injection mold steel inserts positioned next to original mill certificates and hardness reports.

Machining Audit: Steel and hardness verification before assembly.

Phase 3: Machining, EDM & Heat Treatment

Release Target: Precision components verified for material grade, hardness, and dimensional integrity.

  • Entry Condition: Steel block traceability matched to mill certs.
  • Key Checks: Hardness verification, datum control, and in-process dimensional inspection.
  • Verifiable Evidence: Steel Mill Certs (Heat/Lot traceability) + Heat-Treat hardness logs.
  • Hold if: Steel hardness is unverified or machining deviations remain undocumented.

Phase 4: Assembly & Pre-Tryout Readiness

Release Target: Confirmed mechanical integrity and functional safety before machine setup.

  • Entry Condition: All core/cavity inserts fitted and cooling circuits connected.
  • Key Checks: Leak test (100 PSI), slide/lifter motion, and ejector return safety.
  • Verifiable Evidence: Cooling leak test log and assembly pre-trial checklist.
  • Hold if: Cooling lines are unlabeled or mechanical binding is detected during dry-cycling.

Phase 5: T0 / T1 / T2 Trial & Change Control

Release Target: Validated process window and dimensional compliance for CTQ features.

  • Entry Condition: Correct resin lot and drying parameters verified.
  • Key Checks: Scientific molding parameters, short-shot study, and cavity balance.
  • Verifiable Evidence: Trial record, molding condition sheet, and CTQ dimensional report.
  • Hold if: Dimensional deviations lack a correction plan or an approved concession.
Senior Chinese engineer reviewing the final Tool Book dossier, FAI reports, and spare parts BOM.

Handover Review: Finalizing the engineering dossier before release.

Phase 6: Final Acceptance & Release

Release Target: Authorized handover of production-ready hardware and a complete engineering dossier.

  • Entry Condition: Final sample approval and signed FAI report.
  • Key Checks: Spare parts BOM, maintenance SOP, and Tool Book completeness.
  • Verifiable Evidence: Handover Dossier Index and final revision-controlled CAD package.
  • Hold if: Original steel certs are missing or the maintenance schedule is not documented.

Further Review Documents for Stage Verification:

Supplier-Ready Tool Acceptance Criteria

Sample approval alone does not justify tool release. A production-ready mold must meet strict mechanical, dimensional, and document-control standards before shipment. Use the following matrix to ensure your build meets the non-negotiable requirements for long-term reliability and engineering traceability.

Acceptance Area Acceptance Threshold Verification Method Required Record Reject If
Mechanical Readiness Stable slide motion & ejector return at operating temp. Documented 100-cycle dry run at press. Assembly Sign-off Sheet Binding, metal debris, or inconsistent return action.
Cooling Validation Zero pressure drop at 100 PSI (or per project spec). Static pressure-hold & flow rate test. Cooling Leak Test Log Any visual weeping or unverified circuit flow.
CTQ & Dimensional CTQs centered with adequate process margin. Full FAI (First Article Inspection) of all CTQs. FAI Report / CMM Data CTQs clustered at tolerance limits without DOE backup.
Required Dossier Complete Tool Book with final revision-controlled CAD. Dossier index audit vs. handover package. Signed Handover Index Missing original steel certs or maintenance SOPs.

Approval Principle: A tool is accepted only when hardware condition, dimensional evidence, and handover records all agree.

Chinese factory engineer reviewing Tool Book, FAI reports, and CTQ records at a final handover station before mold acceptance.

Dossier Review: Finalizing engineering records before shipment.

What Buyers Should Reject (Gate Discipline)

Do not accept a tool on sample appearance alone. Shipment should be held if the mold lacks a documented maintenance SOP, if critical spare parts are not physically present, or if the final CAD revision history is incomplete. Any tool delivered without original mill certs and heat-treat logs represents a production liability that creates maintenance dependency and undocumented repair risks in the future.

The Handover Dossier (Tool Book)

The Tool Book is the controlled technical package required for future maintenance and engineering traceability. It must contain: Original mill certificates, Heat-treatment verification reports, Final Moldflow correlations, Tool drawings (2D/3D), and the validated Process Window Study (DOE). Without this package, the mold is a "black box" that complicates repeat production.

Related Acceptance References: Review our injection mold acceptance criteria or verify the quality documents PPAP and FAI deliverables required for regulated industry compliance.

Regulated & High-Risk Program Requirements

Standard tool-build controls are often insufficient for high-stakes industries. For Automotive, Medical, and Aerospace programs, we overlay specific "Validation Burdens." These include enhanced traceability, process capability (Cpk) evidence, and formal submission dossiers required before shipment release can be authorized.

Compliance Note: Final submission requirements must always follow your specific contract, part classification, and regulatory expectations.

Quality director reviewing medical IQ-OQ-PQ validation protocols and IATF 16949 PPAP records at a compliance workstation.

Dossier Review: Verifying industry-specific validation packages.

Automotive (IATF 16949)

Mandatory Records: PPAP (Level 1-5), MSA/Gage R&R for all CTQ gauges, PFMEA alignment, and Process Capability (Cpk/Ppk) based on part classification.

Release Condition: Trial and submission status must support formal PPAP approval, not just part-level visual sign-off.

Medical (ISO 13485 & IQ/OQ/PQ)

Mandatory Records: Protocol-driven validation (IQ/OQ/PQ), Resin Lot Traceability (CoC), bio-burden risk mitigation logs, and controlled change-history records.

Release Condition: Tool acceptance cannot bypass validation package completeness where controlled-environment molding applies.

Aerospace / High-Spec

Mandatory Records: AS9102 FAI packages with ballooned drawings, NADCAP-approved special process records (where specified), and long-term (10+ years) record retention.

Release Condition: Shipment release requires full material/process traceability and auditable proof of special-process compliance.

General Industrial

Minimum Records: FAI Dimensional Reports, final Tool Book index, Maintenance SOPs, and physical Spare-Parts BOM.

Release Condition: Visual approval is insufficient where repeatable process windows and controlled handover assets are required.

Relevant Certification References for High-Risk Programs:

Regulated & High-Risk Program Compliance Requirements

Baseline manufacturing checklists cover standard tool-build controls. However, regulated sectors mandate a significant increase in "Validation Burden." For Automotive, Medical, and Aerospace programs, we overlay program-specific traceability, process capability evidence, and formal submission records required before shipment release.

Automotive (IATF 16949 Logic)

  • Mandatory Records: Full PPAP (Level 1-5), MSA/Gage R&R for CTQ gauges, PFMEA, and Process Capability (Cpk/Ppk) based on part classification.
  • Release Condition: Trial and submission status must support formal PPAP approval, not just part-level sample sign-off.

Medical (ISO 13485 & IQ/OQ/PQ)

  • Mandatory Records: Protocol-driven validation packages (IQ, OQ, PQ), Resin Lot Traceability (CoC), and bio-burden risk mitigation logs where applicable.
  • Release Condition: Tool acceptance cannot bypass validation package completeness where medical submission or controlled-environment molding applies.

Aerospace / High-Spec

  • Mandatory Records: AS9102 FAI packages with ballooned drawings, NADCAP-approved special process records (where specified), and long-term record retention.
  • Release Condition: Shipment release requires full material/process traceability and auditable proof of special-process compliance per contract.

General Industrial

  • Minimum Records: FAI Dimensional Report, final Tool Book index, Maintenance SOPs, and physical Spare-Parts BOM.
  • Release Condition: Visual approval is insufficient where gauge-fit or repeat-production control is required for the application.

Compliance Note: This section identifies common program triggers; final submission requirements must always follow your specific contract, part classification, and regulatory expectations.

Relevant Certification References for High-Risk Programs:

Common Failure Modes This Checklist Prevents

Effective quality control is about interception, not post-mortem diagnosis. This checklist intercepts systemic failure modes at the design, machining, and assembly gates long before they reach the injection press or cause shipment delays.

Flash (Shutoff Mismatch)

Intercepted at Phase 4: Eliminates parting line flash by mandating blue-fit records, shutoff-contact verification, and pre-trial assembly sign-off before the tool leaves the bench.

Burn Marks (Inadequate Venting)

Intercepted at Phase 2: Preempted during the DFM/Design gate by verifying vent depth, escape paths, and last-fill risk areas—especially around deep ribs and cosmetic shutoffs.

Warpage (Shrinkage Mismatch)

Intercepted at Phase 1 & 2: Prevents instability by locking resin-grade-specific shrinkage and checking cooling circuit balance against Moldflow predictions where project risk justifies it.

Sample-Only Approval Disputes

Intercepted at Phase 6: Avoids "good enough" arguments by requiring hard FAI data, CTQ measurement evidence, and a complete Tool Book dossier for authorized sign-off.

Fake Progress (Milestone Claims without Proof)

Intercepted at All Gates: Stops suppliers from claiming completion when critical records (Steel certs, HT logs, EDM finish, Trial sheets) are missing. No auditable record = No verified phase completion.

Related Troubleshooting and Inspection References:

Visual Evidence Buyers Actually Trust

Finished mold photos do not prove design intent, material integrity, or trial stability. Real engineering trust is built on a traceable record chain. Here is the evidence buyers should expect before authorizing shipment release.

DFM markup sheet showing gate location, venting notes, cooling path, and CTQ dimensions.

1. DFM Markup Excerpt

Proves: That gate locations, venting intent, and CTQ-related geometry were verified before steel cut. This record prevents high-risk design "discoveries" during T1 that lead to expensive steel rework. It captures the engineering handshake between the part design and the released mold design revision, ensuring no critical feature is overlooked during the design-to-build transition.

Moldflow summary report showing fill balance, air traps, and shrinkage risk areas.

2. Moldflow Validation Summary

Used to Verify: Fill balance, air-trap management, and shrinkage-related distortion risk. Where part geometry or resin sensitivity justifies it, this record provides data-driven confidence that cooling circuits and gating will produce a stable part within the target cycle time. It serves as an essential design-risk translation tool used to optimize process parameters before the tool is mounted to the press.

Original heat treatment and hardness verification report beside cavity and core inserts.

3. Steel & Heat-Treat Certificates

Proves: Material integrity and hardness (HRC) results. This is the only auditable way to verify that cavity and core inserts meet the required material grade and heat-treatment specifications for tool longevity. Without traceable original mill certs and lot numbers, the tool represents a long-term production risk, susceptible to premature cracking, wear, or dimensional drift under mass-production conditions.

CMM and FAI inspection record showing critical dimensions and measured results.

4. CMM & FAI Dimensional Data

Audit Value: Provides physical proof that Critical-to-Quality (CTQ) dimensions are within the required tolerance band. It documents the datums, inspection methods, and actual measured results—moving beyond subjective "visual approval." This evidence is required to authorize the transition from "Trial Approval" to "Final Tool Acceptance," ensuring that the mold produces parts that meet the drawing revision.

T1 trial record showing V-P transfer, fill time, and process validation notes.

5. Scientific Molding Trial Records

Used to Verify: Repeatable process windows. It captures V/P transfer points, actual fill times, cavity balance, and machine settings required to produce conforming parts. This record ensures the "Golden Sample" was produced under stable, traceable, and transferable conditions, rather than a one-time "tweaked" setup that cannot be replicated at the customer's production site.

Tooling dossier index showing final CAD, spare parts list, and maintenance SOP sections.

6. Controlled Tool Book (Dossier)

Proves: Handover completeness. It confirms that the final revision-controlled CAD, physical spare-parts BOM, and maintenance SOPs exist as a single, auditable package. This prevents the loss of critical asset intelligence once the tool arrives at your production facility, facilitating faster restarts and ensuring long-term maintenance can be executed without supplier dependency.

All verifiable technical records are produced using our in-house precision equipment list for mold inspection and machining .

FAQ: Injection Mold Manufacturing Process Checklist

What should be included in an injection mold manufacturing process checklist?

An injection mold manufacturing process checklist should cover RFQ feasibility, DFM freeze, design release, machining, assembly, T0/T1/T2 trials, and final acceptance. Each phase must include release criteria and required proof documents such as steel mill certs, hardness reports, trial sheets, dimensional FAI evidence, and a final Tool Book or maintenance dossier.

When is a mold ready for tool acceptance?

A mold is ready for tool acceptance when mechanical condition, dimensional evidence, trial results, and handover documents support the approved release scope. Sample approval alone is insufficient if leak-test records, CTQ verification, spare parts BOM, maintenance instructions, or revision-controlled final CAD packages are still missing from the engineering dossier.

What records should be captured during T0, T1, and T2 trials?

T0/T1/T2 records should include machine settings, resin lot verification, short-shot or fill-balance checks, CTQ measurements, and issue tracking logs. Process-window evidence or DOE results may also be required depending on the program geometry, part classification, or specific customer approval paths before the tool is released for shipment.

Does sample approval alone mean the mold is ready for shipment?

No. Sample approval does not grant automatic shipment release. A tool is only ready when the physical hardware condition, trial traceability, dimensional evidence, and handover records are complete. This ensures the mold can be safely maintained, restarted, and supported for repeat production once it arrives at the production facility.

Is Moldflow always required?

Moldflow is not required for every project, but it is critical when geometry, cosmetic needs, fill balance, or warpage risks justify simulation before steel release. Review our moldflow analysis review checklist 来 ensure simulation assumptions match actual manufacturing conditions and serve as an essential design-risk translation tool.

Next Engineering Documents by Project Milestone

Choose the document that matches your current approval stage. Do not treat engineering records as interchangeable; trial execution and final handover require different evidence sets.

During Trial Approval

Use this when T0/T1/T2 scientific molding records, cavity balance studies, and FAI dimensional evidence are being closed for release.

T0 T1 T2 mold trial guide and checklist →

Before Final Tool Release

Use this when authorizing shipment release based on Tool Book completeness, physical spare-parts BOM, and revision-controlled CAD packages.

injection mold tool handover checklist →

Document Selection Rule: Always align your review with the current project gate. Using the incorrect checklist for a specific milestone creates record gaps that often delay final tool acceptance at the production site.

Upload Your CAD for a CTQ-Driven Mold Build Review

Submit your part data to receive a project-specific evaluation including CTQ flags, phase-gate risk assessment, and the technical records required to authorize your specific steel release, trial approval, and final release.

✓ NDA Secured for Drawing Review | ✓ Typical Response: 1–2 Business Days | ✓ Technical Risk Assessment Included