500 ml thin-wall takeaway packaging
Hengqi develops square food container moulds around the actual box and lid, PP grade, wall target, cavity output and injection machine. The engineering review focuses on corner filling, wall balance, rim flatness, stacking, ejection and practical cooling before quotation.
Reference capacity
500 ml American-style square food box
Target material
Food-grade PP or buyer-specified resin
Cavity direction
2–6 cavities after machine and output review
Key geometry
Corners, thin walls, rim flatness and lid interface
Runner option
Valve gate or hot runner matched to product layout
Production review
Machine, robot, stacking and packing conditions
Suitable buyer applications
Takeaway food container manufacturers
PP lunch box and deli packaging factories
Food packaging converters adding square-box capacity
Buyers needing matching container and lid tooling
03 / Visual engineering story
Each stage below pairs the engineering decision with a real product, tooling or factory image. This makes it easier to understand what Hengqi will review and manufacture for the project.
01 / Related square-container tooling
The gate route and thickness distribution are reviewed around the longest flow paths and corner transitions. Related square-container tooling helps buyers see how cavity shape, rim and ejection are brought together before the exact 500ml design is released.
02 / Machining & dimensional control
Coordinated machining protects the position of the rim, walls, bottom and insert interfaces. This gives the assembly and trial teams a more predictable starting point for lid-fit and deformation checks.
03 / Hot runner & cooling
Equal melt paths alone cannot prevent uneven shrinkage. The manifold, gate position and cooling layout are developed around the square cavity so wall distribution, corners and rim flatness stay within the agreed production window.
04 / Box-and-lid trial
Trial samples are reviewed for corner completion, wall balance, rim flatness, lid fit, stacking and ejection. The process is then held for continuous running so the buyer can evaluate more than one ideal sample.
01 / Engineering review
A useful tooling proposal must connect the product, resin, machine, automation and output target. These review points make the quotation more specific and reduce correction loops after steel is ordered.
Square corners and long flow paths are reviewed against gate position, resin flow and target wall thickness to reduce short shots and uneven packing.
The container rim, sealing groove, corner shrinkage and matching lid are reviewed as one system rather than as separate moulds.
Product weight, thickness distribution and filling sequence are checked to reduce deformation and maintain usable stiffness.
Cooling is planned around the base, side walls, corners and rim so dimensional stability supports lid fit and stackability.
Release direction, ejector design, robot pick-up and downstream stacking are reviewed to avoid wall damage and nested-product jams.
Cavity count is confirmed against shot size, clamp space, injection speed, cooling capacity and the buyer's output target.
02 / Tooling evidence
The images below are real Hengqi tooling or production references. They show the type of mould structure and manufacturing capability used for application review; the final tooling layout is customized to the actual product.
04 / Project workflow
The project route connects product approval, design, steel, machining, assembly and trial. Exact timing depends on mould complexity, cavity layout, steel and customer approval speed.
Confirm 500 ml geometry, lid interface, wall target, PP grade, stacking and filling application.
Define gate, cavity layout, cooling, inserts, venting, corner filling and ejection around the real machine.
Machine and inspect the core, cavity, rim interfaces and assembly-critical components.
Review filling, wall balance, flatness, lid closure, stacking, ejection and continuous stability.
05 / Trial acceptance
Acceptance should reflect the product's actual job on the filling, packing or consumer-use line. Final criteria are confirmed with the buyer before trial.
Information needed for quotation
A drawing is best, but a clear sample photo and basic production information are enough for the first engineering review.
06 / Buyer questions
These answers provide a practical starting point. Final specifications are based on your drawing, samples, resin, machine and production targets.
Rim shrinkage, corner flatness, sealing groove and material behavior all affect closure. Reviewing both parts reduces later fit corrections.
Yes. Overall dimensions, corner radius, rim, label area, stacking geometry and lid structure can be designed from your drawing or samples.
Product weight, projected area, injection speed, shot size, tie-bar spacing, cooling capacity, automation and the buyer's output target determine the layout.
Review box weight, wall balance, corner filling, rim flatness, lid fit, stacking, ejection, cavity consistency and stable production under an agreed process window.
Square boxes have longer flow paths and corner shrinkage risk, so gate position, cooling, venting, rim support and ejection need more detailed review to protect lid fit.
Continue evaluation