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ZHONGYUE MOULD specializes in the design and manufacture of Custom Plastic Junction Box Moulds / Electrical Junction Box Injection Molds for global electrical component manufacturers. Whether you need a compact rectangular wiring box, a round conduit junction box, or an IP65/IP67 waterproof enclosure mold, our engineering team delivers optimized mold structures tailored to your part drawing and production volume.
We help customers select the right steel grade, runner system (cold runner or branded hot runner), cavity layout, and demolding solution (hydraulic cylinder, angled lifter, or collapsible core) to ensure flash-free parts, uniform wall thickness, and stable cycle times when molding in ABS, PC, PC+ABS, PP, or flame-retardant PA66+GF.
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Mould Name |
Plastic Junction Box Mould |
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Mold Meterial |
P20,2738,718H,NAK80,2316,S136,H13,etc |
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Mold Base |
Self-made,LKM,DME,ASSAB |
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Cavity |
Single/multi |
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Runner |
Cold runner and hot runner |
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Hot Runner Brand |
Master, HUSKY,YUDO,etc. |
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Degsin Software |
UG:Aoto CAD and so on |
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Mold Life |
50-100 million Shots/ 5-6 years, Even in 10 years in good maintenance |
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T1 Time |
45-60 days |
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Plastic Material |
PP ABS |
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Gate Type |
Pinpoint Gate, Edge Gate, Sub Gate, Film Gate, Valve Gate, Open Gate, etc. |
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Mould Surface Treatment |
EDM, texture, high gloss polishing |
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Quality System |
ISO9001 |
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HS Code |
8480719090 |
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Origin |
Huangyan Zhejiang China |
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Package |
Wooden Case |
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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 Junction Box Mould project brighten!
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Box Type |
Common Features in Mold Design |
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Rectangular Wiring / Junction Box |
Screw boss inserts, seal groove, knock-out punch areas, thin-wall ribs |
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Round Conduit Junction Box (1-way / 2-way / 4-way) |
Side core-pulling for conduit entries, sometimes collapsible core or unscrewing mechanism |
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Waterproof / Weatherproof Enclosure (IP54–IP67) |
Precision sealing lip/groove, tight tolerance on flange flatness, high surface finish |
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Terminal / Distribution Sub-box |
Internal divider ribs, DIN-rail mounting bosses, hinge pin holes |
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Custom Electronic Enclosure |
Undercut clips, snap-fit, label window, texture or logo etching |
Proper junction box mold design must address these common challenges:
Wall Thickness Uniformity – Large flat areas tend to warp. We run mold flow analysis (Moldflow) to balance filling and minimize sink marks on thin-wall sections.
Sealing Groove & Flange Flatness – Critical for waterproof ratings. Cavity is finish-ground and polished (SPI A2/B1) to maintain gasket seating.
Knockout / Conduit Entry Demolding – Handled via hydraulic angled slides, lifters, or collapsible core sets depending on entry direction and quantity.
Boss & Rib Design – Ejector pins positioned to avoid marking visible surfaces; cooling channels placed close to thick bosses to prevent voids.
Material Shrinkage Compensation – Shrinkage rates differ between ABS (~0.5%), PC (~0.6%), PP (~1.5–2.0%), and GF-reinforced nylon (~0.3–0.5%); mold cavity sized accordingly.
DFM (Design for Manufacturability) Review – Analyze draft angle, wall thickness, undercuts, gating & ejection feasibility; provide improvement suggestions.
Mold Flow Simulation – Predict fill pattern, weld lines, air traps, clamp force & cooling time.
3D Mold Design (UG/NX, SolidWorks, Pro/E) – Complete cooling layout, slide/lifter design, hot runner balancing.
Precision Machining – High-speed CNC, EDM (Sodick/Charmilles), deep-hole drilling for baffles/bubblers.
Assembly & T1 Trial – Mold trial on injection machine; send trial video + sample parts + dimensional report (CMM).
Correction & Final Approval – Fine-tune before final packaging in fumigation-free wooden case.
15+ Years Export Experience – Molds shipped to Europe, North America, Middle East, Southeast Asia
In-house DFM & Moldflow – Reduce risk before steel is cut
Flexible Runner Solutions – Cold runner / YUDO / HASCO / Mold-Master hot runner (open or valve gate)
Strict QC – CMM inspection, trial sample approval, weekly machining progress updates
1-Year Mold Warranty – Free spare parts & technical support
Custom Branding – Logo etching, texturing (VDI/Mold-Tech), date/year code inserts
Send us your 2D drawing (PDF/DWG) + 3D model (STP/IGS/STEP/X_T) and expected annual shot volume. ZHONGYUE MOULD will reply with a DFM report and formal quotation within 24 working hours.
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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