In today’s competitive industrial landscape, finding reliable manufacturers for custom plastic components is crucial for maintaining product quality and operational efficiency. Nanpi Haokai Hardware Products Co., Ltd., located near Beijing-Shanghai Expressway with convenient transportation access, has established itself as a leading professional private enterprise specializing in metal and plastic component design and production. With over two decades of experience in the stamping and machining industry, our company combines advanced equipment, skilled technical personnel, and rigorous quality management to deliver superior plastic inner casing solutions worldwide.

Comprehensive Manufacturing Capabilities
Our production facility spans over 70 employees including 16 technical professionals and 7 senior technicians, equipped with more than 60 modern processing machines. This includes 30-250 ton stamping presses, CNC automatic lathes, CNC walking core machines, and injection molding machines with capacities from 88T to 250T. This comprehensive equipment array enables us to handle projects ranging from simple plastic casings to complex multi-component assemblies with precision and efficiency.
The integration of design, production, and after-sales services under one roof ensures seamless project execution from concept to delivery. Our ISO 9001:2015 certified quality management system guarantees consistent product quality through every stage of production. By maintaining strict adherence to international standards, we’ve built long-term partnerships with major enterprises across新能源 (new energy), automotive, electrical appliances, medical equipment, instrumentation, and mechanical manufacturing industries.
Core Plastic Component Product Lines
While our expertise covers a wide range of metal and plastic components, our plastic inner casing solutions represent a significant portion of our production capacity. These include:
- Precision Injection Molded Casings: Manufactured using advanced injection molding technology with tolerances as tight as ±0.02mm, suitable for high-precision industrial applications
- Custom Plastic Enclosures: Designed to meet specific environmental requirements including IP65/IP67 ratings for dust and water resistance
- Non-Standard Plastic Components: Produced through both injection molding and CNC machining processes to accommodate unique design specifications
- Engineered Plastic Parts: Utilizing materials like PA66+GF, POM, PC/ABS, and other engineering plastics for enhanced performance characteristics

Material Selection and Customization
Understanding that different applications require specific material properties, we offer comprehensive material options for our plastic inner casings:
| Material Type | Key Properties | Typical Applications |
|---|---|---|
| ABS | High impact strength, good dimensional stability | Electrical enclosures, tool housings |
| PC/ABS | Excellent impact resistance, heat resistance | Automotive components, medical devices |
| PA66+GF | High strength, good wear resistance | Mechanical parts, gears |
| POM | Low friction, excellent dimensional stability | Precision gears, sliding components |
Quality Assurance and Certification
Our commitment to quality begins with material selection and continues through every production stage. All incoming materials undergo rigorous inspection before entering production. During manufacturing, we implement statistical process control (SPC) methods to monitor critical dimensions in real-time. Final inspection includes dimensional verification, functional testing, and visual inspection according to AQL standards.
The ISO 9001:2015 certification we maintain demonstrates our systematic approach to quality management. This international standard requires documented processes for every aspect of production, from order receipt to delivery, ensuring consistent quality across all orders regardless of size or complexity. Our quality system is regularly audited by both internal teams and external certification bodies to maintain its validity.

Customization Capabilities
What truly sets us apart is our ability to transform customer concepts into production-ready components. Our engineering team works closely with clients during the design phase to optimize parts for manufacturability while maintaining functional requirements. This collaborative approach often results in cost savings through material reduction, simplified assembly, or improved product performance.
Our customization services include:
- 3D CAD modeling and prototype development
- Material selection guidance based on application requirements
- Tooling design and fabrication for injection molding
- Production process optimization for cost efficiency
- Secondary operations including printing, assembly, and packaging
For non-standard plastic components requiring unique shapes or features, our CNC machining capabilities provide an alternative to injection molding. This process is particularly valuable for low-volume production or prototypes where tooling costs would be prohibitive.
FAQ
What types of plastic materials do you commonly use for inner casings?
We work with a wide range of engineering plastics including ABS, PC/ABS, PA66+GF, POM, and PP depending on the application requirements. For components requiring flame resistance, we offer materials meeting UL94 V-0 standards. Our material selection process considers factors like impact resistance, temperature tolerance, chemical resistance, and dimensional stability to ensure optimal performance in each specific application.
How do you ensure dimensional accuracy in plastic component production?
Our quality control system incorporates several measures to maintain dimensional accuracy: 1) All tools are manufactured using high-precision CNC equipment with tolerance control within ±0.005mm; 2) During production, we use statistical process control (SPC) to monitor critical dimensions in real-time; 3) Final inspection employs CMM (Coordinate Measuring Machine) for comprehensive dimensional verification against CAD models; 4) Regular tool maintenance prevents wear-related dimension changes.
What is your minimum order quantity for custom plastic casings?
Unlike many manufacturers, we don’t have strict minimum order quantity requirements. While larger volumes benefit from economies of scale, we understand that some projects require smaller production runs. Our flexible manufacturing capabilities allow us to efficiently produce orders ranging from prototype quantities (1-100 pieces) to full production volumes (10,000+ pieces). The exact MOQ depends on component complexity and material requirements, which our sales team can evaluate for each specific project.
How do you handle design modifications after tooling is completed?
We recognize that design changes sometimes occur even after tooling production. Our approach depends on the modification scope: 1) For minor changes (like adding/removing features or adjusting dimensions within ±0.5mm), we can often modify existing tools through EDM (Electrical Discharge Machining) or other precision processes; 2) For significant design changes, we may need to fabricate new tooling components or complete replacement tools; 3) In all cases, we provide detailed cost estimates and lead time impacts before proceeding with modifications.
What surface treatments are available for plastic components?
We offer various surface treatment options to enhance plastic component appearance and functionality: 1) Painting – Available in multiple colors with options for matte, gloss, or textured finishes; 2) Printing – Pad printing or silk screening for logos, text, or graphics; 3) Plating – Metallization processes for conductive or decorative coatings; 4) Texture – Chemical etching or mechanical texturing for improved grip or aesthetic appeal; 5) Antistatic treatments – For components used in sensitive electronic environments. Our engineers can recommend the most suitable surface treatment based on your specific requirements.
Summary
Nanpi Haokai Hardware Products Co., Ltd. stands as a trusted partner for businesses seeking high-quality custom plastic inner casing solutions. Our comprehensive manufacturing capabilities, ISO 9001:2015 certified quality system, and two decades of industry experience enable us to deliver components that meet the most demanding specifications. By combining advanced equipment with skilled technical personnel, we maintain consistent quality across all production volumes while offering the flexibility to accommodate unique customer requirements.
Our commitment to customer satisfaction extends beyond product quality to include responsive communication, on-time delivery, and competitive pricing. Whether you require standard plastic enclosures or complex custom components, our team is prepared to collaborate on your project from initial concept through final production. Contact us today to discuss how we can support your plastic component manufacturing needs with professionalism and expertise.