Ningbo Chaoxu Plastic Products Co., Ltd. undertakes mold development and insert injection molding services for industrial instrument battery housings and plastic shells with pre-embedded brass nut inserts, supporting drawing-based mold making and sample-based reverse engineering. We integrate plastic mold R&D, insert injection molding, and supporting post-processing into one service, targeting industrial instrument, handheld device, lithium battery pack, and automation equipment manufacturers, offering one-stop supporting services of product DFM evaluation, mold manufacturing, and batch injection molding.

      This housing set is an industrial instrument battery protective shell assembly, including the battery main housing, base bracket, and mounting fixing plate. Brass nut inserts are pre-embedded inside the housing for locking and securing the battery and cover plate. The outer side of the housing features reinforcing ribs to enhance impact strength. The multi-component assembly requires matching dimensional tolerances of each part, firm pre-embedded brass nuts without slipping, high housing strength, and vibration resistance to protect the internal battery and circuit. 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 multi-component insert-molded plastic parts.

Product Processing Advantages

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

      2. Early-stage DFM manufacturability analysis — risk prediction for housing reinforcing ribs, brass nut insert positioning, and multi-part assembly clearance; optimization of gating and venting solutions to prevent shrinkage, deformation, and insert rotation or slipping.

      3. Multiple grades of engineering plastics available — ABS, PC, PC/ABS, and glass-fiber reinforced materials, molded in black natural color, meeting impact resistance, vibration resistance, and insulation protection requirements in industrial scenarios.

      4. Precision mold processing — molds are built with brass nut positioning mechanisms to ensure accurate insert placement; multiple molds are developed collaboratively to ensure interchangeability of the complete housing assembly.

      5. Complete quality control system — material certificates available for raw materials and brass inserts; first article confirmation, in-process patrol inspection, thread go/no-go gauge testing, and assembly clearance sampling; production batch traceability.

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

Applicable Processing Categories

      Insert injection molding of industrial instrument battery housings

      Custom mold making for handheld device battery protective housings

      Complete multi-component instrument plastic housings

      Plastic housings with pre-embedded brass nut inserts

      Industrial equipment housings with reinforcing ribs

      Customization of various multi-part industrial control plastic housings

      Other insert-molded and multi-component plastic parts — mold feasibility can be evaluated upon providing drawings or samples.

Common Material Descriptions

      ABS: good molding appearance, excellent toughness, moderate cost, the first choice for conventional instrument housings.

      PC/ABS alloy: impact-resistant, low-temperature resistant, strong toughness, suitable for battery housings under vibration conditions.

      Glass-fiber reinforced PC: high rigidity, not easy to deform, suitable for industrial housings in heavy-load and long-term vibration environments.

      Material selection is determined comprehensively based on product impact resistance, temperature resistance, usage scenarios, 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 (including insert positioning mechanism) → Mold CNC/EDM processing, polishing and fitting → T1 trial molding → Samples sent to customer for confirmation → Mold modification per feedback → Batch insert injection molding after sample approval → Assembly inspection → Product packaging and delivery → After-sales follow-up.

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

      Mold design focuses on reinforcing rib structures and brass nut insert positioning, and controls multi-part assembly tolerances.

      Trial molding tests appearance, thread precision, and complete housing assembly effect; mass production starts after customer confirmation.

Quality Control

      Raw materials and brass inserts are checked for specifications upon incoming inspection; material certificates can be provided.

      Dimension verification at each mold processing stage, with focus on insert positioning and assembly fit tolerances.

      Injection molding production implements first article inspection, scheduled in-process patrol inspections, sampling thread go/no-go testing and assembly verification, and monitoring defects such as insert displacement and housing deformation.

      Finished products undergo key inspection of appearance, threads, and assembly effect; 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 insert molding and multi-component complete 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, material, and insert 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, insert supply, 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, threads, and complete housing assembly effect, completing mold acceptance.

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

FAQ

Q: Can molds be made with only physical housing samples but no drawings?

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

Q: Will the pre-embedded brass nuts rotate or slip during injection molding?

A: The mold is designed with a dedicated positioning structure, and knurled brass nuts are used. The plastic overmolding interlocks firmly, so the nuts will not slip under locking force.

Q: Can the multiple housing parts guarantee assembly interchangeability?

A: Mold processing strictly controls tolerances, and complete assembly verification is carried out during the trial molding stage to ensure part interchangeability.

Q: Does industrial instrument insert 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, threads, 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: insert injection molding of industrial instrument battery housings, custom mold making for complete instrument plastic housing sets, pre-embedded brass nut plastic parts, precision injection molds, sample/drawing-based customization

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