Ningbo Chaoxu Plastic Products Co., Ltd. undertakes mold development and injection molding services for PLC industrial control boxes, instrument housings, and controller plastic shells, supporting drawing-based mold making, sample-based reverse engineering, and insert molding production. We integrate plastic mold R&D, precision injection molding, and supporting post-processing into one service, targeting industrial automation, electrical equipment, and instrumentation manufacturers, offering one-stop supporting services of product DFM evaluation, mold manufacturing, and batch injection molding.

      The PLC industrial control box is used to install circuit boards and electronic components, serving as a protective housing for industrial control modules. The product requires high precision of housing mounting hole positions, stable snap-fit structures, and tight upper/lower shell assembly. It features an integrated rail clip that can be directly snapped onto a DIN rail. The housing needs insulation, flame retardancy, and impact resistance properties, uniform wall thickness, no shrinkage or deformation, and compliance with electrical safety regulatory standards. Mold design, trial molding, and mass production can be carried out based on customer 3D drawings or physical samples.

      The factory is located in Mould City, Fanshi, Longshan, Cixi, Ningbo, covering an area of 2,000 square meters, with independent mold workshop and injection molding workshop. The mold workshop is equipped with a full set of processing equipment including CNC machining centers, high-speed engraving and milling machines, EDM machines, and grinders. The injection molding workshop is equipped with Haitian injection molding machines with servo robotic arms, providing stable mass production capability for flame-retardant electrical plastic parts.

Product Processing Advantages

      1. Integrated mold opening and injection molding — product structure evaluation, mold processing, trial molding and mold correction, and injection molding production are all completed in-house, reducing outsourced processes and facilitating control over delivery time and product consistency.

      2. Early-stage DFM manufacturability analysis — risk prediction for rail clips, pre-embedded brass nut mounting inserts, housing reinforcing ribs, and terminal slot structures; optimization of gating and venting solutions to avoid defects such as warpage, clip breakage, and weld lines.

      3. Multiple grades of engineering plastics available — ABS, flame-retardant ABS, PC, and PC/ABS alloy, available in black, white, and other colors, meeting the electrical insulation, flame retardancy, temperature resistance, and aging resistance requirements of industrial control applications.

      4. Precision mold processing — professional ejection design for DIN rail clip structures to ensure clip elasticity and snap-in force; high dimensional accuracy of mounting holes and terminal slots to ensure PCB assembly interchangeability.

      5. Complete quality control system — material and flame-retardant certificates available for flame-retardant raw materials; first article confirmation, in-process patrol inspection, sampling inspection of hole positions and clip snap-in force; production batch traceability.

      6. Supporting post-processing — burr trimming, brass nut embedding, appearance sorting, packaging and shipping, reducing customer secondary processing workload.

Applicable Processing Categories

      Injection molding of PLC industrial control plastic boxes

      Custom mold making for DIN rail-mounted instrument housings

      Electrical controller housing plastic parts

      Plastic housings for industrial control modules

      Rail clip-type instrument boxes

      PCB protective housings and instrumentation housings

      Customization of various flame-retardant electrical plastic housings

      Other industrial control and instrument plastic housings — mold feasibility can be evaluated upon providing drawings or samples.

Common Material Descriptions

      Flame-retardant ABS: cost-effective, good molding performance, flame-retardant and insulating properties, the most commonly used material for industrial control boxes.

      PC/ABS alloy: excellent impact resistance, temperature resistance, and flame retardancy, suitable for industrial control housings in complex working conditions.

      PC: high flame retardancy, high strength, good weather resistance, suitable for outdoor and high-protection electrical housings.

      Material selection is determined comprehensively based on product flame-retardant grade, usage scenarios, temperature requirements, and cost. Engineers provide material selection recommendations.

Processing Workflow

      Customer provides 3D drawings / physical samples → DFM product structure evaluation → Output solution quotation, confirmed by both parties → Mold structure design → Mold CNC/EDM processing, polishing and fitting → T1 trial molding → Samples sent to customer for confirmation → Mold modification per feedback → Batch injection molding after sample approval → Product inspection → Packaging and delivery → After-sales follow-up.

      During the requirement evaluation stage, customers provide drawings or physical samples, specify flame-retardant grade, material, and annual output requirements — quotation solution output within 1–2 working days.

      Mold design focuses on rail clips, mounting holes, and terminal slot structures, optimizing the cooling system to reduce housing warpage and deformation.

      Trial molding tests appearance, hole position accuracy, and DIN rail clip mounting effect; mass production starts after customer confirmation.

Quality Control

      Raw materials are checked for grade upon incoming inspection; material certificates available for flame-retardant materials.

      Dimension verification at each mold processing stage, with focus on key tolerances of mounting holes and rail clips.

      Injection molding production implements first article inspection, scheduled in-process patrol inspections, sampling testing of clip snap-in force, and monitoring defects such as deformation and short shots.

      Finished products undergo key inspection of assembly surfaces, hole positions, and clip elasticity; defective products are sorted and quarantined.

      Production records document machine and raw material batches for full traceability.

Factory Basic Information

      Factory covers about 2,000 square meters, divided into independent mold, injection molding, and assembly workshops.

      Mold workshop has over ten sets of complete processing equipment including CNC machining centers, high-speed engraving and milling machines, EDM machines, and grinders.

      Injection molding equipment consists of Haitian injection molding machines with servo robotic arms and production monitoring systems, capable of stable production of flame-retardant electrical plastic parts.

      Core engineers have 25 years of plastic molding experience and 15 years of automotive parts quality control experience, with OEM supporting service experience.

      Factory is located in Mould City, Fanshi, Longshan, Cixi, Ningbo, near National Highway 329, with convenient logistics and transportation.

Cooperation Steps

      1. Consultation & contact: Provide 3D drawings or physical samples, specify annual output, flame retardancy, and material requirements; response within 1 working day.

      2. Solution evaluation: Engineers complete product evaluation and output mold and injection molding product quotation within 1–2 working days.

      3. Quotation confirmation: Confirm mold steel, plastic material, delivery time, and cooperation terms.

      4. Mold development: Complete structural design, processing, assembly, trial molding, and mold correction; cycle time depends on product complexity.

      5. Sample confirmation: Send trial samples; customer verifies appearance, assembly, and rail clip effect, completing mold acceptance.

      6. Batch production: Carry out injection molding production per order, deliver after inspection and packaging.

FAQ

Q: Can molds be made with only physical industrial control box samples but no drawings?

A: Yes, we support sample-based reverse engineering to generate 3D models before mold development.

Q: Can industrial control housings meet flame-retardant requirements?

A: Yes, raw materials with corresponding flame-retardant grades can be selected to meet industrial control electrical safety requirements, and material reports can be provided.

Q: Will the DIN rail clip break after repeated installation and removal?

A: At the DFM stage, we optimize clip thickness and draft angle and select tough flame-retardant materials to ensure the clip is not easily broken after repeated installation and removal.

Q: Does PLC industrial control box injection molding support small-batch trial production?

A: After mold acceptance, we support everything from small trial orders to large batch orders.

Q: Are samples provided for confirmation before mass production?

A: Yes, samples are provided after trial molding. Mass production starts only after customer verifies dimensions, assembly, and clip performance.

Contact Information

      Company name: Ningbo Chaoxu Plastic Products Co., Ltd.

      Factory address: No. 5, Fanshi Weisan Road, Longshan Town, Cixi City, Ningbo City, Zhejiang Province

      Business: PLC industrial control box injection molding, rail-mounted instrument housing mold customization, electrical control housings, flame-retardant plastic parts, precision injection molds, sample/drawing-based customization

      1688 store: https://chaoxusuliao.1688.com