Nesting Stackable Box with Attached Lid Mould

Nesting Stackable Storage Box with Attached Lid Mould – Euro-Size Attached Lid Container / Nestable Tote Injection Mold Manufacturer

ZHONGYUE MOULD is a professional Chinese injection mold manufacturer supplying Nesting Stackable Box with Attached Lid Moulds / One-Piece PP Nestable Totes with Integral Hinge Lids (Euro Attached-Lid Containers, 21L / 46L / 56L / 67L – 400×300mm & 600×400mm Footprints) to global logistics providers, pharmaceutical distributors, e-commerce fulfillment centers, and 3PL warehouse operators.

Unlike a separate-body storage box + loose lid, this product is molded in ONE shot as a single plastic part: the box body, the lid (single-flap or dual-flap "crocodile" lid), and a thin PP integral living hinge (0.25–0.4mm web) connecting them. The sidewalls have nesting taper (1.5–3° per side) so empty totes nest deeply — nested height 75–90mm vs. full height 220–365mm, saving 60–75% empty return volume. Many versions include tamper-evident seal eyelets, 4-side label holders, and ergonomic handgrips.

Our molds are single-cavity (1×1) producing Body+Lid+Hinge together (optional separate 2-cavity spare lid mold quoted), with BeCu insert cooling at hinge zone (moderated flow to preserve PP ductility & hinge life), central core baffle, hidden submarine gate on lid inner flange, and full DFM validating nesting interference clearance (≥1.5mm per side when nested 10-high) & stacking lip engagement with lid of box below.

From 21L 400×300mm nested totes with attached lid, 46L/56L/67L 600×400mm Euro attached-lid containers (flat-bottom conveyor-ready), to crocodile dual-flap lids with strap/strap-slots, we provide DFM review & Moldflow cooling/warp analysis before steel cutting.

Plastic Injection Storage Box Mould specifications :

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What Is a Nesting Stackable Box with Attached Lid?

A Nesting Stackable Box with Attached Lid (also called Attached Lid Container – ALC / Nest & Stack Tote) is injection-molded from virgin PP (MFR 8–12 g/10min for best hinge fatigue life; MFR 12–18 acceptable for non-hinge areas) in a single-cavity mold that forms box + lid + integral living hinge simultaneously.

Key identifiers vs. previous articles:

Nesting Taper — sidewalls tapered inside & out (1.5–3°/side); empty boxes slide inside one another; nested height typically 75–90mm (21L–67L range).

Attached / Integral Hinge — thinned PP web (0.25–0.4mm) polished & radiused; survives 50,000+ open/close cycles without white stress-cracking when correct MFR PP & mold-temperature profile used.

Euro Footprint Compatibility — 600×400mm (46L–67L) or 400×300mm (21L) to stack on EU pallets (1200×800mm fits 2×3 nests); flat base for conveyor/belt travel.

Tamper-Evident Eyelets + Label Holders — molded-in holes for disposable seals & 4-side recessed label plaques.

Single Mold Shot = Body + Lid + Hinge — no loose lid to lose; optional separate spare-lid mold quoted.

Key Mold Engineering Highlights (Nesting ALC Version)

Integral Living Hinge Zone — Web Thinning & BeCu Moderated Cooling

Cavity hinge web locally thinned to 0.25–0.4mm (typical 0.3mm for PP MFR 8–12) with R0.15–0.25mm blend radii both sides, mirror-/high-satin polished (SPI A2/B1). BeCu insert at hinge zone runs ΔT 5–6℃ (not over-cooled!) to retain PP molecular orientation & folding endurance (50k+ cycles). Over-cooling → hinge brittle; under-cooling → sink on lid/box near hinge.

Nesting Taper & Interference DFM — 3D Nesting Stack Simulation

Sidewall draft 1.5–3°/side (ID & OD same taper to keep wall thickness constant when nested). We simulate 10–12 nested empties in 3D to verify minimum clearance ≥1.5mm (rec. 2mm) between nested wall & base protrusions (ribs, stacking lip). Target: nested height ≤80mm (600×400 series) or ≤75mm (400×300 series).

Crocodile Lid (Dual-Flap) or Single-Flap Design

Dual-flap ("crocodile") lids interlock at center & engage box top lip; require center-parting rib detail & sometimes mini loose insert for undercut latch-profile — checked in 3D assembly. Single-flap version simpler, same mold style.

Stacking Lip Engagement DFM

Top flange has recessed stacking ledge that engages the lid-top of box below when full-stacked. We verify stacking lip flatness ±0.3mm & lid-top recess dimension vs. box-below-rim in DFM.

Hidden Sub-Gate on Lid Inner Flange / Box Top Inner Flange

Ø1.2–1.8mm submarine gate shears on inner non-visible face; NEVER gate through hinge web (causes weak orientation & burn). Vestige dressed flush; no visible gate mark on outer faces.

Cooling — Central Baffle + BeCu Hinge + BeCu Bottom Radius

Core: Ø10–12mm baffle; Cavity bottom radius: BeCu insert; Hinge zone: BeCu insert with moderatedwater flow. 2–3 isolated circuits; ΔT inlet–outlet ≤4℃ (core), 5–6℃ (hinge zone acceptable).

Tamper Eyelet & Label Holder Detailing

Molded-in Ø4–5mm thru-holes (eyelets) for security seals; recessed 80×40mm label plaques (4 sides) with draft ≥2°. No sharp edges — radius ≥0.5mm to prevent label peel & finger cuts.

Ergonomic Handgrips / Closed Handles

Through-holes with generous radii (R3–5mm) & filleted edges — DFM-checked for stress concentration. Optional closed handle loop (adds minor undercut — loose insert or shallow slide if present).

Applications of Nesting Stackable Boxes with Attached Lid (ALCs)

Our Manufacturing & Validation Process (Nesting ALC Mold)

Nesting DFM & Hinge Fatigue Review — Analyze wall thickness (1.8–2.8mm typ.), hinge web 0.25–0.4mm with radii, nesting taper 1.5–3°/side, tamper-eyelet Ø, label-holder recess. Run 3D nesting interference check (10-high nest) & Moldflow cooling/warp. Recommend PP MFR 8–12 for hinge life. Free DFM report.

Steel & Hinge-Zone Prep — Select P20/718H; order BeCu insert (MOLDMAX™) pre-machined to net shape; if crocodile latch undercut present, prep H13 nitrided mini-insert.

Precision Machining — High-speed CNC rough/finish cavity & core; deep-hole baffle drilling; hand-fit BeCu hinge insert with thermal-contact verification; polish hinge web SPI A2/B1; machine label-plaque recess & tamper-eyelet thro' holes.

Assembly & T1 Trial — Run on in-house machine with specified PP (MFR per your spec); produce full-assembly sample; perform hinge fold test (manual/mechanical 50k+ goal), check nested height (target ≤80mm for 600×400), stacking lip fit on sample below, gate-vestige quality. Supply trial video + samples + CMM report.

Correction & Final Approval — Adjust cooling flow / vent if needed; ship in fumigation-free heavy-duty case w/ mold manual, spare parts (ejector pins, BeCu insert avail. as consumable), steel certs.

After-Sales Support — 1-Year warranty (non-man-made), free spare parts, remote guidance for re-venting / BeCu insert replacement.

Why Choose ZHONGYUE MOULD for Your Nesting ALC Mold?

Euro-Container Mold Experience — 21L/46L/56L/67L 600×400 & 400×300 nesting ALC molds built in-house; familiar with crocodile-lid & single-flap geometries

Nesting Interference DFM + Hinge Fatigue Consultancy — We simulate 10-high nests in 3D, verify stacking lip engagement, and advise PP MFR (8–12) & hinge-web thickness for 50k+ fold life

BeCu Hinge-Zone Expertise — Moderated cooling (not over-cold) to preserve PP ductility; thermal-contact verified during fit

Strict QC & Transparent Progress — Weekly machining photos, T1 sample approval (nested height check + hinge fold test) before shipment

Export Experience — Molds shipped to Europe (EN 840 footprint-compat discussion), North & South America, SEA, Middle East

1-Year Warranty + Replaceable BeCu Hinge Insert Supply

Frequently Asked Questions — Nesting Stackable Box with Attached Lid Mold

Q: What PP MFR do you recommend for best hinge life?

A: MFR 8–12 g/10min (Copolymer PP) is ideal for integral hinge — retains fold-endurance (50,000+ cycles without white stress-cracking). MFR 12–18 is usable but hinge life decreases; MFR >20 not recommended for hinge zone.

Q: How much space does nesting save?

A: Typical nested height = 75–90mm (vs. full height 220–365mm) → 60–75% volume reduction when empty. We design & verify in 3D nesting simulation (10–12 boxes nested) to guarantee ≥1.5mm (target 2mm) clearance — no wedging.

Q: Crocodile (dual-flap) lid vs. single-flap — any mold difference?

A: Both use same 1×1 cavity producing Body+Lid+Hinge. Crocodile lid has center-parting rib & sometimes a mini loose insert or shallow slide for latch undercut — we include this in DFM. Functionally, crocodile lids interlock centrally & resist accidental opening better.

Q: Can you add tamper-evident seal holes & label holders?

A: Yes — standard on most ALC molds: Ø4–5mm eyelets for disposable seals & 4-side recessed label plaques (~80×40mm) included in cavity design at no extra charge (unless custom size requested).

Q: What do you need for a quotation?

A: 2D drawing (PDF/DWG) + 3D model (STP/IGS/X_T) OR clear photos with dims (L×W×Full H, Nested H, Volume, wall thickness, hinge-web detail if known). Tell us PP grade you plan to run (MFR), annual volume, footprint standard (400×300 or 600×400), and lid type (single-flap / crocodile).

Request a Quote for Your Nesting Stackable Box with Attached Lid Mould

Send your Nesting ALC 2D drawing + 3D model (or sample photos with detailed dimensions: outer/inner L×W×H, nested height, wall thickness, hinge-web if specified) and project requirements. Tell us PP MFR you'll use & lid style. ZHONGYUE MOULD will provide a free Nesting-Interference DFM + Hinge Fatigue Comment + Moldflow cooling summary + formal quotation within 24–48 working hours.

Contact us now to start your Euro-Size Nestable Attached-Lid Container / Nesting Stackable Tote Injection Mold project!

How we processing the project?

About us

Driven by the philosophy:

“Quality Makes the Future, Focus Creates Professional”

Zhongyue Mould is a leading company in the plastic injection air conditioner Cover mould industry. Our highly experienced team of engineers and designers have many decades of combined experience in plastic air conditioner Cover mould design and manufacturing. We provide a comprehensive service, specializing in the production of high-quality and high-precision air conditioner Cover moulds. We have also assisted numerous customers in customizing various types of plastic air conditioner Cover moulding lines.

We can also offer comprehensive assistance in the management of your production process. The procurement department will purchase high-quality raw materials, while the technical department will select the appropriate plastic formula. In accordance with the parameters of the plastic air conditioner Cover mould life requirements and market positioning, we will select the most suitable plastic air conditioner Cover parameters, structure, etc. Our extensive production capacity allows us to deliver plastic air conditioner Covers promptly, at competitive prices and with guaranteed quality.