Ningbo Chaoxu Plastic Products Co., Ltd. undertakes mold development and precision injection molding services for plastic seal seats and plastic support sealing parts, 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 the hydraulic & pneumatic, instrumentation, water pump & valve, and automation equipment industries, offering one-stop supporting services of product DFM evaluation, mold manufacturing, and batch injection molding.

      This plastic seal seat features an annular structure with internal rib support design and high coaxiality requirements, serving as a plastic fitting for internal support positioning and sealing limit inside equipment. The product has flat end faces, high dimensional accuracy on inner and outer diameters, and good structural rigidity. It can be used with sealing rings to provide positioning support, isolation and cushioning, and auxiliary sealing. The housing is free from porosity and sink mark defects, meeting assembly clearance requirements, and can be used inside fluid equipment, industrial control valve parts, and power components. 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 high-precision annular 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 ensuring dimensional consistency.

      2. Early-stage DFM manufacturability analysis — risk prediction for annular roundness, reinforcing ribs, and wall thickness uniformity; optimization of gate and venting solutions to prevent deformation, sink marks, and concentricity deviation.

      3. Multiple grades of engineering plastics available — ABS, PC, POM, PA nylon, etc., available in black or natural color. Wear-resistant, oil-resistant, and chemical-resistant materials can be selected as required to suit different sealing conditions.

      4. Precision mold processing — reasonable ejection structure for the annular cavity, controlling product roundness and end face flatness, ensuring inner and outer diameter coaxial accuracy to meet sealing assembly requirements.

      5. Complete quality control system — first article inspection, in-process patrol inspection, sampling inspection of inner/outer diameters, end face flatness, and concentricity; 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 plastic seal seats

      Plastic sealing support parts for instrumentation

      Plastic sealing bases for valves and water pumps

      Annular precision plastic bushings and positioning washers

      Wear-resistant nylon / POM plastic seals

      Customization of various industrial precision annular plastic parts

      Other sealing and support plastic parts — mold feasibility can be evaluated upon providing drawings or samples.

Common Material Descriptions

      POM: low friction, wear-resistant, dimensionally stable, suitable for moving-fit sealing and support applications.

      PA nylon: good toughness, impact resistance, certain oil resistance, suitable for hydraulic equipment parts.

      PC: high rigidity, dimensional stability, good temperature resistance.

      ABS: cost-effective, stable molding, first choice for conventional static sealing support parts.

      Material selection is determined comprehensively based on product wear resistance, medium resistance, temperature resistance, dimensional accuracy 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 material, dimensional tolerance, and annual output requirements — quotation solution output within 1–2 working days.

      Mold design focuses on annular structure, wall thickness uniformity, and ejection solution, controlling roundness and coaxiality.

      Trial molding tests appearance, dimensional accuracy, and assembly fit performance; mass production starts after customer confirmation.

Quality Control

      Raw material incoming inspection verifies grade; material certificates available for specialty engineering plastics.

      Dimension verification at each mold processing stage, with focus on inner/outer diameter, roundness, and end face flatness tolerances.

      Injection molding production implements first article inspection, scheduled in-process patrol inspections, sampling inspection using calipers and fixtures to verify dimensions, monitoring defects such as deformation, short shots, and sink marks.

      Finished products undergo key inspection of appearance and dimensional accuracy; 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 precision annular plastic parts 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 tolerance 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 dimensions, roundness, and assembly sealing performance, completing mold acceptance.

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

FAQ

Q: Can molds be made with only physical plastic seal seat samples but no drawings?

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

Q: Are annular parts prone to oval deformation during injection molding?

A: Mold design optimizes gate, cooling, and ejection structures; the DFM stage optimizes wall thickness, and process debugging controls deformation to ensure roundness.

Q: Can oil-resistant and wear-resistant POM / nylon be used for seal seat materials?

A: Yes, we support injection molding of specialty engineering plastics such as POM and PA, and can recommend suitable materials based on working conditions.

Q: Does plastic seal seat 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 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: injection molding of plastic seal seats, custom mold making for precision annular plastic parts, specialty engineering plastic parts, precision injection molds, sample/drawing-based customization

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