Production mould technical dossier
2CAV 6-comp box lid mould for thin-wall multi-compartment lunch box packaging. The tooling is matched with 350T high-speed machines, targets cycle time within 6 seconds, and is engineered for stable sealing fit, lid flatness, stack release and automated handling.
Typical product
Lid for 6-compartment lunch box, meal prep tray lid, takeaway meal tray cover
Machine matching
350T high-speed injection molding machine
Cycle time target
Within 6 seconds per shot under suitable production conditions
Fit requirement
Matched with 6-comp box rim structure for stable sealing and transport
Stacking control
Lid warpage control and stack release design for automation compatibility
Validation focus
Tray fit, lid flatness, rim engagement, stack separation, packing-line pickup and transport leakage checks
Review the route from drawing and DFM through steel, trial and acceptance.
View evidenceSee how runner, gate and cavity balance are evaluated for repeatable filling.
View evidenceConnect product tolerances with CNC, EDM, inserts and component control.
View evidenceUnderstand dimensional verification and the inspection evidence available.
View evidenceHengqi proof system
Buyers do not evaluate the product concept alone. They also need evidence that the supplier can design, machine, measure, trial and support the mould through production acceptance.
60days
A controlled route from DFM and design approval through machining, trial, correction and acceptance.
3μm
Precision inspection supports dimensional verification for inserts, cores, cavities and critical interfaces.
60+
Engineering, machining, assembly, trial and project support are connected throughout the tooling programme.
300
Production and support resources cover mould development, manufacturing, inspection and after-sales response.
Hot runner and multi-cavity flow balance are reviewed around the real product and output target.
CNC, EDM, component fitting and CMM inspection are connected through the same manufacturing route.
Engineering support continues from drawing review and trial correction to production and after-sales response.
01 / Engineering review
Product geometry, resin, machine, cycle, lid or label and automation are reviewed as one system. The sections below explain the project-specific decisions buyers should confirm before steel is released.
Engineering checkpoint 01
This 2CAV 6-compartment box lid mould is built for thin-wall meal packaging where sealing consistency affects transport safety, food presentation and consumer opening experience.
The lid geometry can be tuned for stack release, anti-sticking behavior and packing-line handling performance under high-speed production.
Engineering checkpoint 02
Lid flatness, rim engagement force, vent design and edge thickness transitions all influence sealing reliability and resistance to cracking during opening.
Hengqi can review matching tray drawings, resin behavior and output targets to optimize cooling distribution, gate position and ejection layout before mold release.
Engineering checkpoint 03
Buyers typically compare this tooling on three dimensions: sealing pass rate, cycle stability and long-run maintenance cost after mass-production handover.
This page is structured to support technical RFQ decisions, helping teams align lid performance requirements with machine capability and launch schedule.
Engineering checkpoint 04
A lunch box lid project should account for whether the tray is filled manually, with a dosing line, or with robotic handling because each workflow changes lid pickup, stack release and closure requirements.
Hengqi can review lid height, vent position, sealing land width and robotic take-out clearance before tooling so the cover works reliably beyond the mold trial room.
Engineering checkpoint 05
The trial should confirm flatness after cooling, closure force on the real tray, rim contact continuity, stack separation and whether the lid edge resists cracking during opening.
For automated packaging lines, buyers should also test vacuum or gripper pickup, nested lid release and repeated closure after filling because these checks often expose warpage that is not visible from a single sample.
02 / Tooling specification
These values describe the current reference project. Final steel, cavity count, runner, machine and cycle target are confirmed from the customer product and production plan.
Typical product
Lid for 6-compartment lunch box, meal prep tray lid, takeaway meal tray cover
Machine matching
350T high-speed injection molding machine
Cycle time target
Within 6 seconds per shot under suitable production conditions
Fit requirement
Matched with 6-comp box rim structure for stable sealing and transport
Stacking control
Lid warpage control and stack release design for automation compatibility
Validation focus
Tray fit, lid flatness, rim engagement, stack separation, packing-line pickup and transport leakage checks
Number of holes
2 cavities standard, project-specific adjustment available
Lid performance focus
Flatness, rim engagement force and anti-crack edge behavior
Front and rear mold material
Domestic 2344/s136
Mold base material
P20/4Cr13/Customer specified
Runner
Needle Valve/Needle Point Hot Runner
Customization
Lid shape, dome height, vent features, logo texture and tray compatibility
03 / Before shipment
The exact checklist is agreed for each project. These are the core records buyers normally use to confirm dimensions, function, output and correction closure before shipment.
View inspection processRecord the trial setup, resin, machine, process window, visible defects and required corrections.
Verify critical product and tooling dimensions against the approved drawing and agreed tolerances.
Check shot-to-shot consistency, thin-wall distribution and deformation risk across representative samples.
Review closure engagement, rim flatness, leak risk, opening force and stacking where the product requires it.
Confirm the practical cycle target under suitable resin, cooling, machine and automation conditions.
Provide agreed samples, trial video, inspection results and correction records for customer confirmation.
04 / Quotation checklist
A drawing or sample is the starting point. Machine, resin, output, closure and acceptance details allow Hengqi to review cavity layout, steel, runner, cooling and automation with fewer assumptions.
Product drawing or physical sample
Capacity, dimensions and target part weight
Resin grade and food-contact requirement
Target cavity number and annual output
Injection machine model and tonnage
Expected cycle time and automation plan
Matching lid, label or sealing requirement
Acceptance standard and delivery schedule
Send your drawing, sample photos and production target. Hengqi will review the project scope before preparing the quotation.
Start WhatsApp review Send formal inquiry05 / Buyer questions
Yes. Hengqi can tune lid dimensions and rim locking features according to your existing tray sample or CAD drawing.
If lid warpage is not controlled, sealing force can become uneven and lids may fail during stacking, transport or automated packing.
Please provide tray and lid drawings or samples, resin type, cavity requirement, machine tonnage and output expectations.
Yes. We can tune stack release, ejection behavior and handling geometry to improve compatibility with robotic take-out and downstream packing equipment.
Ordering them together is often safer because sealing land, rim tolerance, stack height and transport tests can be validated as one packaging system.
Common causes include lid warpage, uneven rim contact, resin shrinkage mismatch, weak edge thickness, poor stack release and tray dimensions that drift from the lid design.
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