Ningbo Chaoxu Plastic Products Co., Ltd. undertakes mold development and injection molding services for smoke alarm housings, smoke detector sensor shells, and fire detector plastic housings, supporting drawing-based mold making and sample-based reverse engineering. We integrate plastic mold R&D, precision injection molding, and supporting post-processing into one service, targeting fire alarm, security electronics, and instrumentation manufacturers, offering one-stop supporting services of product DFM evaluation, mold manufacturing, and batch injection molding.

      The smoke detector housing is a precision plastic part for fire safety applications, consisting of a round base and a grille-type breathable cover. The grille slot dimensions are uniform, ensuring smooth entry of smoke into the detection chamber. The product requires a smooth round curved appearance, complete thin-wall grille molding without short shots, tight upper/lower shell assembly alignment, and precise mounting hole positions. The material needs to meet flame-retardant, insulating, and anti-aging requirements, adapting to fire safety product 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 thin-wall grille-type 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 dense grille thin-wall structures, round curved surfaces, and assembly flanges; optimization of gating and venting solutions to prevent short shots in grilles, weld lines, and housing deformation.

      3. Multiple grades of flame-retardant engineering plastics available — flame-retardant ABS, PC, and PC/ABS alloy, available in white natural color, meeting the flame-retardant, insulating, and aging-resistant requirements of fire safety products.

      4. Precision mold processing — precision insert structure is adopted at the grille area to ensure uniform grille slots, high coaxiality of the round contour, and uniform assembly clearance between upper and lower shells.

      5. Complete quality control system — material and flame-retardant reports available for flame-retardant raw materials; first article confirmation, in-process patrol inspection, sampling inspection of grille appearance and assembly dimensions; production batch traceability.

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

Applicable Processing Categories

      Injection molding of smoke alarm housings

      Custom mold making for smoke detector plastic housings

      Temperature sensor plastic housings

      Round plastic parts for fire alarms

      Security sensor grille covers

      Customization of various fire electronics and sensor plastic housings

      Other thin-wall grille and round electronic housings — mold feasibility can be evaluated upon providing drawings or samples.

Common Material Descriptions

      Flame-retardant ABS: good molding fluidity, easy filling of thin-wall grilles, cost-effective, the mainstream material for smoke detector housings.

      PC: high flame-retardant grade, strong rigidity, temperature and aging resistance, suitable for high-standard fire detection equipment housings.

      PC/ABS alloy: balances toughness and flame-retardant performance, good impact resistance, suitable for sensor housings in complex working environments.

      Material selection is determined comprehensively based on product flame-retardant grade, usage scenarios, weather resistance 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 (grille precision inserts) → 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 dense grille thin walls, round curved surfaces, and assembly flanges, optimizing gate and venting to solve thin-wall filling challenges.

      Trial molding tests grille completeness, appearance curved surface, and housing assembly clearance; 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 grilles, assembly flanges, and mounting holes.

      Injection molding production implements first article inspection, scheduled in-process patrol inspections, monitoring defects such as short shots, deformation, and burrs.

      Finished products undergo key inspection of grille completeness, appearance, and assembly clearance; 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, excelling in thin-wall precision plastic part production.

      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 grille structure, appearance, and assembly 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 smoke detector housing samples but no drawings?

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

Q: Will the thin-wall grille positions have short shots during injection molding?

A: The venting and gating solutions are optimized at the mold stage, combined with high-fluidity flame-retardant raw materials and injection process debugging, to ensure complete grille molding.

Q: Can the housing material meet fire safety flame-retardant requirements?

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

Q: Does smoke sensor housing 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 appearance, grille, and assembly 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: smoke sensor housing injection molding, smoke alarm housing mold customization, fire and security plastic parts, precision thin-wall injection molds, sample/drawing-based customization

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