Plastic Desk Dust Bin Middle Frame Mould

ZHONGYUE MOULD manufactures custom plastic desk dust bin middle frame moulds (intermediate ring) featuring a spring slot and pivot. The cavity is polished in PP or ABS, with full DFM analysis. As a household mold exporter from China, we invite you to request your quote now.

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Product Description

Plastic Desk Dust Bin Middle Frame Mould – Custom Mini Desktop Trash Can Intermediate Ring / Pressure Ring Injection Mold Manufacturer

ZHONGYUE MOULD is a professional Chinese injection mold manufacturer supplying Plastic Desk Dust Bin Middle Frame Moulds / Mini Desktop Trash Can Intermediate Rings (Pressure Rings, Connecting Collars with Spring Slot & Pivot Holes) to global household products wholesalers, supermarkets, and private-label brands. The middle frame sits between the bin body and the swing/press-open lid — commonly molded in PP (MFR 10–20 for slight flexibility) or ABS (rigid, color-matched) with a smooth polished cavity (SPI B1/B2), featuring an integrally molded torsion/compression spring channel, Φ3–5mm pivot axle holes (machined core pins), and snap-fit clips engaging the bin body rim. Our middle-frame molds are typically single cavity (1×1) or 1+1 L+R for symmetric designs, with hidden submarine gate on the inner back face, precision-ground core pins (h7 tolerance) for pivot hole concentricity, and DFM analysis to ensure proper clearance (0.15–0.3mm) with both bin body and lid pivot bosses.

From press-to-open middle rings with spring seat, swing-lid connecting collars with pivot bore, to decorative separator rings (no mechanism), we provide full DFM review before steel cutting.

Plastic Dust Bin Mould specifications :

Item	Specification / Options
Mold Name	Plastic Desk / Mini Desktop Dust Bin Middle Frame (Intermediate Ring / Pressure Ring / Connecting Collar) Injection Mould
Cavity & Core Steel	Cavity: P20 (pre-hard HRC 28–33) standard; 718H (HRC 33–38) optional for longer life & better polish; Core: P20 / 718H; Core Pins: H13(SKD61) ground
Mold Type	Two-plate open-close; optional 3-plate if center-pin-point used (rare)
Mold Base	LKM / DME / HASCO / Self-designed (typical 250×300mm – 350×400mm; weight 0.25–0.6T)
Cavities	1×1 standard;1+1 L+R available for symmetric frame; 2-cavity possible for plain decorative ring
Runner System	Cold runner (sub/edge, Y-branch for 1+1); Hot tip NOT typical due to small part size
Gate Type	Submarine (latent) gate on inner back flange / non-visible face; fan gate alternative
Ejection	Ejector pins at base rim; mini lifter(s) for clip undercut if present
Cooling	Central baffle Ø6–8mm + BeCu insert at spring-channel radius; single isolated circuit
Slides / Lifters	0–2 mini angled lifters or shallow slide for snap-fit clip undercut (if any); precision ground core pins for pivot holes
Surface Finish	Cavity: SPI B1/B2 satin polish standard; SPI A2 optional for luxury/clear PS; Core: SPI B1; NO rattan/VDI texture unless decorative version specified
Mold Life Expectancy	≥300,000 shots (P20); ≥500,000 shots (718H)
Recommended Molding Material	PP (MFR 10–20, for slight compliance), ABS (rigid, color-match), PS (clear decorative ring); masterbatch per request
Design Software	UG NX, Pro/E, SolidWorks, AutoCAD
Tolerance Control	±0.05 mm general; ±0.05 mm on pivot hole Ø; assembly clearance to body/lid ±0.15–0.3mm per stack-up check
Mould material	Hardness	Mould life
P20	HRC 28-33	>300,000 shots
718	HRC 33-36	>500,000 shots
H13	HRC >43	>800,000 shots
2344	HRC >48	>800,000 shots
S136	HRC 48-52	>1,000,000 shots

Make your nextPlastic Dust Bin Mould project brighten!

Key Mold Engineering Highlights for Middle Frame Molds

Precision Pivot Hole Core Pins (Φ3–5mm) — Ground H13 or SKD61 core pins to h7 tolerance; pinned or shrink-fit into core; checked for concentricity to datum centerline (±0.05mm) — critical for smooth lid swing/spring action.

Spring / Torsion Bar Channel Geometry — Uniform wall thickness (2.0–2.5mm) in spring groove; local cooling bubbler near thick channel ends to avoid sink; channel draft ≥2° checked in DFM.

Snap-fit Clip Undercut — Mini Angled Lifter or Simple Slide — Small undercut clip engaging bin-body rim; handled via 1–2 mini angled lifters or shallow slide; interference simulated in 3D assembly.

High-Polish / Satin Cavity — No Rattan Texture — SPI B1 (satin) standard; SPI A2 optional for premium clear-look PS version; NO VDI/rattan etching unless specified as decorative outer ring.

Hidden Submarine Gate on Inner Flange / Back Face — Gate vestige invisible from outer visible face; cold runner Y-branch if 1+1 L+R; hot-tip rare (small part, not cost-justified typically).

Compact Cooling — Central Baffle + BeCu Insert — Ø6–8mm baffle through core; BeCu (beryllium copper) insert at spring-channel base radius; single isolated water circuit sufficient for cycle 8–14s.

Assembly Clearance DFM (Body ↔ Frame ↔ Lid) — We verify recommended clearance 0.15–0.3mm per stack-up with your bin body & lid drawings to prevent tight-seat or wobble.

Our Mold Manufacturing & Validation Process

Project Kick-off & DFM Review — Analyze spring-channel wall thickness, pivot hole Ø & pin projection, clip undercut draft, gate location & ejector layout; verify assembly clearance (0.15–0.3mm) with your bin body & lid drawings.

Mold Design Approval (3D) — Full assembly with cooling baffle layout, precision core-pin definition (h7), mini lifter/slide for clip if any, venting strategy (0.01–0.015mm parting-line vent).

Precision Machining — High-speed CNC rough/finish cavity, deep-hole drilling for cooling baffle, ground H13 core pins (concentricity checked), cavity/core SPI B1/B2 polish.

Assembly & T1 Trial — Run on in-house injection machine; check pivot hole Ø with pin gauge, spring-channel fit with dummy spring/wire, assembly test with body & lid samples; supply trial video + sample parts.

Correction & Final Approval — Fine-tune if needed; ship in fumigation-free case with mold manual & spare parts list (core pins, ejector pins, sprue bushing).

After-sales Support — 1-Year mold warranty, free spare core pins / ejector pins for non-man-made damage, remote technical guidance.

Why Choose ZHONGYUE MOULD for Your Household Mould?

Rich Household Commodity Mold Experience — Desk bins (body + lid + middle frame sets), rattan baskets, chairs, crates built in-house

In-house DFM Review with Assembly Stack-Up Check — Verify pivot hole tolerance & clearance between body↔frame↔lid before steel cutting

Precision Core-Pin & Spring-Groove Expertise — Ground H13 pins, uniform wall in functional channels, mini-lifter design for clip undercuts

Strict QC & Transparent Progress — Weekly machining photos, T1 sample approval (assembly-fit test) before shipment

Export Experience — Molds shipped to Europe, North America, South America, Southeast Asia, Middle East

1-Year Mold Warranty + Spare Core Pins / Ejector Pins

Frequently Asked Questions — Middle Frame / Intermediate Ring Mold

Q: What exactly is the "middle frame" vs. the lid or body?

A: The middle frame (intermediate ring / pressure ring) sits between the bin body and the lid. It houses the spring/torsion bar channel, pivot axle holes for the lid, and snap-fit clips to lock onto the bin body rim. The lid swings or presses on this frame — the frame itself does NOT replace the lid.

Q: Do you need the bin body & lid drawings to quote the middle frame mold?

A: Strongly recommended — we need to check assembly clearance (pivot boss engagement depth, clip snap-fit to body rim Ø, lid swing arc vs. frame opening) and verify pivot hole position. If you only have the frame drawing we can still quote, but assembly-fit cannot be pre-verified.

Q: Single cavity or 1+1 L+R?

A: Most middle frames are 1×1 single cavity. If the frame is perfectly symmetric L/R (identical part used on both sides of a dual-bin unit — rare for single-bin) we can do 1+1. Plain decorative rings sometimes 2-cavity. We'll advise per your part geometry.

Q: What surface finish — any rattan texture?

A: No — middle frames are SPI B1 (satin) standard, SPI A2 optional for clear PS decorative ring. Rattan/VDI texture is NOT applied unless you specifically request a decorative outer-ring version.

Q: What do you need for a quotation?

A: 2D drawing (PDF/DWG) + 3D model (STP/IGS/X_T) of the middle frame AND preferably the bin body & lid 3D (or at minimum their mating dimensions: top OD of body, lid pivot boss location). Specify material (PP MFR / ABS grade).

Request a Quote for Your Plastic Desk Dust Bin Middle Frame Mould

Send your middle frame 2D drawing + 3D model (and ideally bin body/lid mating dims or files) and project requirements. ZHONGYUE MOULD will provide a free DFM review with assembly stack-up check + formal quotation within 24–48 working hours.

Contact us now to start your Mini Desktop Trash Can Intermediate Ring / Pressure Frame Injection Mold project!

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