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China Custom Modular DIN Rail PLC Enclosure Supplier, Exporter
Product Description
Product Overview & Application Scope
This custom injection molded enclosure is intended for PLC controllers, distributed I/O modules, power modules, energy monitors and sensor interfaces. The SM-DIN8872 reference platform is described for 35 mm DIN rail or direct panel mounting. Final rail engagement, mounting dimensions and component clearances are confirmed against the approved assembly drawing.
The illustrated enclosure has a beige body and base, rectangular terminal-access openings, side ventilation slots, corner fastening locations, mounting flanges and a red rail-release latch. PCB guides, threaded inserts and internal fastening details can be specified to match your PCB layout. Their configuration and supply scope are confirmed in the assembly drawing.
OEM/ODM CUSTOM MANUFACTURING SUPPORT
- Drawing-Based Customization: Outer dimensions, wall thickness, terminal cutouts, display windows, cover design and internal mounts can be reviewed against your PCB and assembly requirements. Any shielding or special finish is quoted as a defined option, not an included feature.
- Multi-Process Coordination: Sunmy coordinates injection molding with CNC machining, turning, stamping and casting for project-specific hardware. Included processes, assembly scope and inspection responsibilities are confirmed in the quotation.
Tooling & Injection Molding Process Insights
Enclosure development focuses on the relationships between the PCB, connector openings, cover, base and rail latch. Tooling and inspection requirements are agreed before production.
- Tooling & DFM Review: DFM review covers wall thickness, screw-boss transitions, draft, gate location, venting and cooling. These checks target sink marks, incomplete filling and cover-to-base mismatch. Simulation requirements, tool steel, cavity count and any mold-life commitment are defined in the tooling quotation rather than treated as fixed specifications for every enclosure.
- CNC & EDM Tooling Preparation: CNC machining and EDM are selected to suit the approved cavity, core, opening and fastening geometry. The finish is matched to an agreed texture or sample. Trial parts are checked for warpage, flash, fastener access and cover alignment before the production process is approved.
- Threaded Insert Options & Rail-Latch Assembly: Brass inserts may be specified where threaded fastening is required. Insert size, quantity and installation method are agreed with the PCB and screw layout; torque and pull-out limits require a defined test plan. The red latch is a separate component. Its resin, engagement force and cycle requirements are confirmed during sample evaluation.
Key Technical Specifications
Reference configurations and customization options are listed below. Dimensions and materials become order specifications only after drawing approval. No tested IP, flammability, torque or cycle-life rating is claimed for the pictured enclosure.
| Engineering Parameter | Reference Configuration & Custom Scope |
|---|---|
| Product Series / Model | Modular DIN rail PLC enclosure; SM-DIN8872 reference model, subject to confirmation. |
| Primary Manufacturing Process | Plastic injection molding. |
| Base Material | High-impact ABS; grade subject to approval. |
| Alternative Material Options | PC, PC/ABS, flame-retardant ABS or PA66; selection subject to engineering review. |
| Flammability Rating | Resin-specific; rating to be verified. |
| Mounting Interface | 35 mm top-hat DIN rail reference interface; direct panel mounting via flanges. Fit to be checked. |
| DIN Rail Latching System | Separate red release latch shown; resin, engagement and cycle target to be agreed. |
| Nominal External Dimensions | Reference: 88 mm (L) × 72 mm (W) × 35 mm (H). Verify against the approved drawing. |
| Internal Architecture | PCB guides, standoffs and brass inserts as specified; internal layout and insert quantity to be confirmed. |
| Thermal Ventilation | Side ventilation slots and terminal openings; layout coordinated with PCB and connector positions. |
| Color / Appearance | Beige shown; light grey, white or custom RAL/Pantone colors subject to sample approval. |
| Ingress Protection (IP Rating) | No rating assigned; final assembly requires validation. |
| Dimensional Tolerance | Critical dimensions per approved 2D drawing. |
| Surface Finish | Molded texture, matte or gloss as specified; finish and cosmetic limits matched to an approved sample. |
| Secondary Post-Processing | CNC cutouts, display windows and marking; EMI/RFI shielding evaluated separately. |
| Customization Scope | Tooling, body/base geometry, openings, PCB mounts, rail latch, color and branding per approved design. |
Key Features & Competitive Advantages
DIN Rail and Panel Mounting
A rail latch and mounting flanges provide alternative installation routes. Confirm rail fit, fastener positions and release access on the assembled sample.
Ventilated Housing Layout
Side slots and terminal openings provide ventilation paths. Their positions are reviewed against the electronics layout; thermal or touch-protection performance is not inferred from the openings alone.
Cover and Base Alignment
Corner fastening locations and mating edges are reviewed together. Screw size, engagement and assembly torque are specified to suit the selected housing configuration.
Optional Threaded Inserts
Brass inserts can be evaluated for serviceable screw joints. Quantity, installation method and retention targets are specified to suit the service and assembly requirements.
Application-Specific Openings
Terminal and connector cutouts are matched to your component drawings, with access for wiring and installation included in the layout review.
Prototype-to-Production Coordination
Sunmy supports drawing review, prototype planning, tooling and molding, with related metal hardware coordinated as required. Price and schedule follow the approved scope.
Technical FAQ (International B2B Procurement)
Q1: How do you control porosity around machined bearing and mounting areas?
A: Porosity risk is addressed during DFM by reviewing gate, overflow, venting, local wall thickness, machining allowance, and the location of critical functional zones. Casting parameters are then optimized during sampling. Where the application requires additional verification, X-ray inspection or leak testing can be added to the agreed control plan.
Q2: What information do you need to quote a custom motor end bell housing?
A: The fastest route is to provide a 3D model or 2D drawing together with the target alloy, annual quantity, critical tolerances, surface finish, inspection requirements, and application details. If drawings are unavailable, a physical sample can also be reviewed for reverse-engineering feasibility.
Q3: Can you make prototypes before committing to die-cast tooling?
A: The quotation sets out the project milestones:
- Prototype method and sample delivery after design review.
- Tooling completion and first-trial samples after drawing approval.
- Inspection, customer fit checks and any required revisions.
- Production and dispatch after sample sign-off and material confirmation.
Q4: How are dimensional accuracy, latch fit and assembly quality checked?
A: The agreed inspection plan covers mounting dimensions, opening positions, cover fit, warpage and visible molding defects. Rail engagement, insert retention and repeated assembly are checked when specified. Methods, sampling and acceptance limits are agreed before production. Any requested protection rating needs separate validation for the final configuration.
Q5: What are the MOQ, packaging and quotation requirements?
A: MOQ depends on tool availability, resin, color and order scope; prototype and pilot quantities are reviewed separately. Protective bags and compartmented export cartons can be specified. Send your 2D drawing, 3D model or sample details, PCB layout, rail requirement and quantity to Shenzhen Sunmy Hardware Co., Ltd. for a project-specific review and quotation.
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