Ningbo Zhaoxu Plastic Products Co., Ltd. undertakes mold development and injection molding processing for large industrial equipment housings and industrial plastic structural parts. We support mold development from drawings, 3D scanning and reverse engineering from samples, and injection production with customer-supplied materials or molds. Integrating plastic mold R&D, precision injection molding and supporting post-processing, we provide one-stop services including product DFM evaluation, mold manufacturing and mass injection molding for manufacturers of automation equipment, instruments & meters, engineering machinery accessories and industrial controls.

      Industrial structural parts are mostly used for outer covers of various industrial instruments and equipment heads to protect internal electronic components, provide structural support and achieve dustproof protection. The products have strict requirements for shell rigidity, impact resistance, uniform wall thickness, precision of mounting holes, curved surface appearance, assembly stops and strength of screw posts. For large plastic parts, special attention shall be paid to control injection deformation, sink marks and warpage. We can complete mold design, mold trial and mass production according to customers’ 3D drawings or physical samples.

      The factory is located in Fanci Mold City, Longshan, Cixi, Ningbo, covering an area of 2000㎡ with independent mold workshop and injection molding workshop. The mold workshop is equipped with complete processing equipment including CNC machining centers, high-speed engraving and milling machines, EDM machines and grinders. Large-tonnage Haitian injection molding machines equipped with servo manipulators are deployed in the injection workshop for stable mass production of large industrial plastic parts.

Product Processing Advantages

      1. Integrated mold opening and injection molding. Product structure evaluation, mold machining, mold trial & revision and injection production are all completed in-house, reducing outsourced processes and facilitating lead time control and product consistency.

      2. Pre-project DFM manufacturability analysis. Risk prediction for curved surfaces, mounting holes, reinforcing ribs, screw posts and stop structures. Optimize gating and venting schemes to reduce warpage and sink mark risks of large-size products.

      3. Multiple grades of engineering plastics available. ABS, ABS+PC, PP, PC and glass fiber reinforced materials are optional. Matte textured surface can be achieved to meet industrial equipment requirements of impact resistance, aging resistance and high strength. Logo marks can be integrally formed in-mold.

      4. Precision machining for large molds. Reasonable design of ejection and cooling systems to control injection deformation of large parts, guarantee tolerance of multiple sets of mounting holes and satisfy complete machine assembly requirements.

      5. Sound quality control system. Material certificates can be provided for raw materials. First article confirmation, in-process patrol inspection and key assembly dimension testing are implemented with traceable production batches.

      6. Supporting post-process services, including polishing, appearance inspection, simple assembly and packaged delivery to reduce customers’ workload of secondary processing.

Applicable Product Categories

      Injection molding of outer cover structural parts for industrial equipment

      Custom mold development for plastic housings of instruments and meters

      Plastic shell parts for automation equipment

      Plastic protective covers matched for engineering machinery

      Large special-shaped curved industrial plastic parts

      Equipment mounting brackets and structural parts with reinforcing ribs

      Integral forming of in-mold logo characters

      Custom various non-standard industrial plastic housings

      For other industrial supporting plastic parts, mold opening feasibility can be evaluated with drawings or samples.

Common Material Guide

      ABS: Good moldability, easy texture etching on surface and cost-effective, suitable for housings of indoor instruments and equipment.

      ABS+PC: Impact-resistant, heat-resistant and dimensionally stable, suitable for industrial equipment housings under complex working conditions.

      PC: High impact resistance, flame retardancy and good weather resistance, suitable for outdoor equipment housings with high protection requirements.

      Glass fiber reinforced plastics: High rigidity and low deformation tendency, suitable for stressed industrial supporting structural parts.

      Material selection is comprehensively determined by product application scenario, strength, heat resistance, flame retardant grade and cost. Engineers provide material selection suggestions.

Processing Workflow

      Customer provides 3D drawings / physical samples → DFM product structure evaluation → Proposal and quotation issued for mutual confirmation → Mold structural design → Mold CNC/EDM machining, polishing and mold fitting → T1 mold trial → Samples sent to customer for confirmation → Mold revision and adjustment based on feedback → Mass injection molding after sample approval → Product inspection → Packaging & delivery → After-sales follow-up.

      During requirement evaluation, customers provide drawings or physical samples and specify requirements for appearance, materials and annual output. Quotation will be available within 1‑2 working days.

      Mold design focuses on curved parting lines, reinforcing ribs, mounting holes and stop structures. Optimize cooling and venting to reduce deformation risks of large parts.

      Mold trial inspects appearance, dimensions and assembly gaps. Mass production will be launched after customer approval.

Quality Control

      Raw material grades are checked upon warehousing; material certificates are available.

      Dimension verification in each mold machining procedure, focusing on key tolerances of mounting holes and stops.

      First article inspection is implemented for injection production, with regular in-process patrol inspection to monitor defects such as deformation, sink marks and flash.

      Finished products are mainly inspected on assembly surfaces, appearance and hole position dimensions; defective products are sorted and isolated.

      Production records include machine number and raw material batch to realize batch traceability.

Factory Profile

      The factory covers approximately 2000 square meters with separate workshops for mold, injection molding and assembly.

      The mold workshop is equipped with more than ten complete sets of equipment including CNC machining centers, high-speed engraving and milling machines, EDM machines and grinders.

      Injection molding equipment are large-tonnage Haitian injection machines equipped with servo manipulators and production monitoring systems.

      The core engineers have 25 years of plastic molding experience and 15 years of auto parts quality control experience, with supporting service experience for OEM manufacturers.

      The factory is located in Fanci Mold City, Longshan Town, Cixi, Ningbo, close to National Highway 329 with convenient logistics and transportation.

Cooperation Steps

      1. Inquiry & Communication: Provide 3D drawings or physical samples and specify annual output, appearance and material requirements. Response and communication within 1 working day.

      2. Solution Evaluation: Engineers complete product assessment and issue quotations for molds and injection molded products within 1‑2 working days.

      3. Quotation Confirmation: Confirm mold steel, plastic materials, lead time and cooperation terms.

      4. Mold Development: Complete structural design, machining, assembly, mold trial and revision. Lead time depends on product size and complexity.

      5. Sample Confirmation: Deliver trial samples for customers to check appearance, curved surfaces, hole position accuracy and assembly effect and complete mold acceptance.

      6. Mass Production: Carry out injection production according to orders and deliver goods after inspection and packaging.

FAQ

Q: Can you develop molds if I only have physical samples of industrial structural parts without drawings?

A: Yes. We support 3D scanning and reverse engineering from samples to generate 3D models for mold development.

Q: Large industrial housings tend to warp and deform during injection molding. Can this be solved?

A: At the early DFM stage, we optimize the structure, gating and cooling system. Collaborative optimization of mold design and injection process can effectively reduce warpage and deformation.

Q: Can the logo marks on the shell surface be directly formed by mold?

A: Yes. Concave and convex characters can be engraved on mold inserts for integral injection forming. Laser engraving and silk-screen printing after molding are also available.

Q: Does injection molding of industrial structural parts support small-batch trial production?

A: After mold acceptance, both small trial orders and large-volume orders are acceptable.

Q: Will samples be provided for confirmation before mass production?

A: Yes. Samples will be provided after mold trial, and mass production will start only after customer approval.

Contact Information

      Company Name: Ningbo Zhaoxu Plastic Products Co., Ltd.

      Factory Address: No.5 Weisan Road, Fanci, Longshan Town, Cixi City, Ningbo, Zhejiang Province

      Business Scope: Injection molding of industrial equipment structural parts, custom mold development for instrument and meter housings, large special-shaped plastic parts, precision injection molds, custom manufacturing from samples & drawings

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