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ZHONGYUE MOULD is a professional Chinese injection mold manufacturer supplying 40L Storage Box Lid Moulds / Plastic 40L Storage Container Lid Injection Molds (Snap-fit or Hinged Box Covers) to global household products wholesalers, supermarkets, and private-label brands. The 40L storage box lid is a medium-sized shallow-draw component (depth typically 40–70mm) molded in PP (MFR 8–15 g/10min, color-matched to body or clear PS/ABS for premium viewing windows) with a smooth satin-polish outer face (SPI B1/B2) and inner snap-fit ribs engaging the 40L box top flange. Our lid molds are commonly designed as 2-cavity or 4-cavity (2×1, 2×2, or 1+1 L+R for contoured lids) to balance the slower cycle of the 40L box body (1×1, cycle ~22–35s). Features include hidden submarine gate on the inner rim, micro angled-lifters or shallow slides for snap-clip undercuts, optional silicone-seal groove, and DFM verification of lid-to-body seating clearance (0.2–0.4mm). For premium versions, we integrate changeable transparent window inserts (PS/ABS) within the same lid mold.
From snap-on storage box lids (opaque PP color-match), clear viewing window lids (PS/ABS insert), to gasket-groove lids for dust-proof storage, we provide full DFM review before steel cutting.
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Item |
Specification / Options |
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Mold Name |
40L Plastic Storage Box Lid (Cover / Top Cap) Injection Mould |
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Cavity & Core Steel |
Cavity: P20 (pre-hard HRC 28–33) std.; 718H (HRC 33–38) or S136 (HRC 48–52) optional for high-gloss window zone; Core: P20 / 718H; Micro Lifters/Slides: H13(2344 ESR) nitrided or SKD61 |
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Mold Type |
Two-plate open-close + 1–2 micro angled lifters or shallow slides for snap-clip undercut |
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Mold Base |
LKM / DME / HASCO / Self-designed (typical 400×450mm – 500×600mm; weight 0.6–1.2T) |
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Cavities |
2×1, 2×2, 4×1 standard to match 1×1 body output; 1×1 available for custom shaped lids |
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Runner System |
Cold runner (Y-branch balanced) standard; Hot tip optional for single-cavity clear lid |
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Gate Type |
Submarine (latent) gate on inner flange / non-visible back face; fan gate alternative for clear lid |
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Ejection |
Ejector pins symmetrically placed; shallow draw → simple pins suffice; optional early-eject unused |
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Cooling |
Baffle Ø6–8mm + peripheral bubbler; isolated circuit; ΔT ≤ 3℃ |
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Slides / Lifters |
1–2 micro angled lifters or shallow slide (stroke 5–10mm) for snap-fit clip undercut; nitrided H13/SKD61 |
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Surface Finish |
Cavity: SPI B1/B2 satin (std. PP lid), SPI A2 high-gloss optional (S136 insert for clear window zone); Core: SPI B1; Logo: changeable insert |
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Mold Life Expectancy |
≥300,000 shots (P20 cavity + H13 lifters); ≥500,000 shots (718H) |
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Recommended Molding Material |
PP (MFR 8–15, color-match to body, UV-stabilized optional), GPPS (clear window), ABS (gloss window); masterbatch per request |
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Design Software |
UG NX, Pro/E, SolidWorks, AutoCAD |
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Tolerance Control |
±0.05 mm general; lid-to-body flange seating clearance 0.2–0.4mm (verified w/ box-body dims) |
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Mould material |
Hardness |
Mould life |
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P20 |
HRC 28-33 |
>300,000 shots |
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718 |
HRC 33-36 |
>500,000 shots |
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H13 |
HRC >43 |
>800,000 shots |
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2344 |
HRC >48 |
>800,000 shots |
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S136 |
HRC 48-52 |
>1,000,000 shots |
Make your next Plastic Storage Box Mould project brighten!
Multi-Cavity for Output Balance (2×1, 2×2, 4×1) — 40L box body is 1×1 (cycle ~22–35s); lid cycles faster (~10–18s) → 2-cavity or 4-cavity lid mold matches daily throughput without over-producing lids. Runner Y-branched & balanced per cavity fill time in DFM.
Snap-Fit Clip Undercut — Micro Angled Lifter or Shallow Slide — 1–2 small lifters (travel 5–10mm) or shallow angled slide withdraw snap-clip that engages 40L box top flange; H13 nitrided inserts for wear; interference checked in 3D assembly.
Shrinkage Compensation for PP Lid (Medium Shallow-Draw) — PP shrinkage ~1.2–1.8%; lid perimeter / flange seat slightly enlarged per Moldflow-verified shrink; lid-to-body clearance controlled at 0.2–0.4mm (checked with your 40L box-body drawing/dims).
Hidden Submarine (Latent) Gate on Inner Flange / Back Face — Gate vestige invisible from outer visible face; cold runner Y-branch standard for multi-cavity; hot-tip (open) optional for single-cavity clear PS premium lid.
Thin-Wall Cooling & Short Cycle — Baffle Ø6–8mm + peripheral bubbler in core; isolated circuit; typical cycle 10–18s; 0.01–0.015mm parting-line vents to prevent burn on thin sections.
Surface Finish — Satin Polish Standard / High Gloss for Window Zone — Cavity SPI B1/B2 satin (standard PP lid); SPI A2 high-gloss (S136 insert) for clear window zone; NO rattan/VDI weave etching unless specially ordered as decor-version. Core polished SPI B1 for easy release.
Optional Silicone-Seal Groove & Logo Insert — Machined O-ring groove in core; changeable logo emboss/deboss insert on non-visible inner side or back face.
Transparent Window Insert Design (Premium Lid) — Cavity designed with removable S136 high-gloss insert for clear window zone; window material (PS/ABS) injected separately or via 2K overmolding (optional).
Project Kick-off & DFM Review — Analyze lid wall thickness (1.5–2.5mm typ.), snap-clip undercut & lifter stroke, gate location & runner Y-branch balance for multi-cavity, lid-to-body seating clearance (NEED 40L box-body top flange dims / drawing). Suggest cavity number to match your 40L body mold output ratio.
Mold Design Approval (3D) — Full assembly with cooling baffle layout, micro-lifter/slide detail with interference check, runner balancing simulation, venting strategy (0.01–0.015mm parting-line).
Precision Machining — High-speed CNC rough/finish cavity, core/cavity SPI B1/B2 (or S136 A2 for gloss zone), H13 micro-lifter nitriding & hand-fitting, logo insert pocket machined.
Assembly & T1 Trial — Run on in-house injection machine; check snap-fit on 40L box body sample (sent or purchased separately), gate vestige, cooling cycle (~10–18s); supply trial video + sample lids + dimensional check.
Correction & Final Approval — Fine-tune lifter timing if needed; ship in fumigation-free case with mold manual & spare parts list (micro-lifter spring, ejector pins, sprue puller).
After-sales Support — 1-Year mold warranty, free spare parts for non-man-made damage (esp. micro-lifter spring/pins), remote technical guidance.
Rich Household Mold Experience — 5L–120L storage boxes (body + lid sets), rattan bins, chairs, crates, baskets built in-house
In-house DFM with Body-Lid Fit Check — Verify lid-to-box flange clearance (0.2–0.4mm) using your 40L body drawing/dims before steel cutting; advise optimal cavity count (2×1 / 2×2) to match body output
Multi-Cavity & Micro-Lifter Expertise — Balanced Y-branch runner, small snap-clip lifters/slides correctly calculated; S136 high-gloss zone optional for clear window
Strict QC & Transparent Progress — Weekly machining photos, T1 sample approval (fit-check on body sample) before shipment
Export Experience — Molds shipped to Europe, North America, South America, Southeast Asia, Middle East
1-Year Mold Warranty + Spare Parts Supply (micro-lifter springs, ejector pins)
Q: What cavity count should I choose — 1×1, 2×1 or 2×2?
A: 40L box body is usually 1×1 (cycle ~22–35s). Lid cycles faster (~10–18s), so we recommend 2-cavity (2×1) or 4-cavity (2×2 or 4×1) to roughly balance daily output. Tell us your body cavity count & daily volume — we'll calculate the optimal lid cavity number.
Q: Does the lid mold need the box body drawing?
A: Strongly recommended — we need the box top-rim Ø or L×W, flange thickness, and snap-groove location (or send the body 3D) to verify lid seating clearance (0.2–0.4mm) and snap-clip engagement before cutting steel.
Q: What surface finish — any rattan/woven texture?
A: Standard is SPI B1/B2 satin polish (no texture) for PP lids. SPI A2 high-gloss (S136 insert) optional for clear PS or premium ABS window zone. VDI/rattan cane etching NOT applied unless you order a special decor-version lid to match rattan box body.
Q: Can you add a groove for silicone seal gasket?
A: Yes — machined O-ring/gasket groove in core; we can also advise groove cross-section (typically 2.0–3.0mm wide × 1.5–2.0mm deep) per standard silicone cord size.
Q: What do you need for a quotation?
A: 2D drawing (PDF/DWG) + 3D model (STP/IGS/X_T) of the lid AND preferably 40L box-body top flange dims or 3D; tell us your body mold cavity number (1×1 etc.), annual volume, preferred lid cavity (2×1 / 2×2), and material (PP MFR / GPPS / ABS).
Send your 40L storage box lid 2D drawing + 3D model (and ideally 40L box-body top flange dims/file) and your 40L body mold cavity info. ZHONGYUE MOULD will provide a free DFM review with lid-body fit check + cavity-number recommendation + formal quotation within 24–48 working hours.
Contact us now to start your 40L Plastic Storage Container Lid / Cover Injection Mold project!
Driven by the philosophy:
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.
Address
No.38, Kaituo Road Xinqian Street, Huangyan Taizhou City, Zhejiang Province, China
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