Automotive Injection Molded Parts - 10+ Years Expert Manufacturer & Global Auto Industry Supplier
Welcome to [Qingdao Xinlongji Metal Manufacturing Co., Ltd.], a professional integrated enterprise of production and foreign trade with over 10 years of focused experience in automotive injection molding. We specialize in the R&D, production and customization of high-precision automotive injection molded parts, providing reliable, industry-compliant solutions for global B2B clients including automotive OEMs, auto parts suppliers, and automotive interior/exterior system manufacturers. Our core strengths lie in automotive-specific injection molding technology, professional technical support, strict quality control systems aligned with auto industry standards, and comprehensive global logistics services, making us a trusted partner for numerous international automotive brands across Europe, North America, and Asia.
Product Overview: Automotive Injection Molded Parts
Our automotive injection molded parts are engineered to meet the rigorous requirements of the automotive industry, adhering to the core formula of "product name + core function + technical advantage + application scenario + quality guarantee". As critical components for automotive operation and user experience, these parts feature core functions including high dimensional precision, excellent temperature resistance (-40℃ to 120℃), strong impact resistance, and reliable assembly compatibility.
Technical advantages: We adopt automotive-grade precision injection molding technology, equipped with mold flow analysis to optimize part structure, ensuring stable production of complex-shaped components and consistent product performance. Application scenarios cover key automotive systems: interior (instrument panel components, door trims, air outlet grilles), exterior (bumper brackets, mirror housings, wheel covers), and functional components (engine compartment plastic parts, battery pack accessories for new energy vehicles).
Quality guarantee: All products comply with IATF 16949 automotive quality management system standards and RoHS/REACH environmental protection requirements. We provide customized services based on clients' 3D drawings, samples, and specific automotive system matching needs, ensuring each part perfectly fits the assembly and performance requirements of target vehicle models.
Production Processes & Process Visualization
With in-depth expertise in automotive injection molding, we have mastered core processes tailored to automotive part requirements, including automotive-grade mold design, material pre-treatment, precision injection molding, and post-processing. Injection molding is our core process, where we use intelligent injection molding machines with real-time parameter monitoring (temperature, pressure, speed) to adapt to the characteristics of automotive-grade plastics (e.g., high-temperature resistance, rigidity). In addition to injection molding, we also provide supplementary processes such as CNC precision trimming, ultrasonic welding, automotive-specific surface treatment (anti-scratch painting, vacuum plating), and modular assembly, realizing one-stop service to meet the comprehensive processing needs of automotive parts.
To enhance transparency and credibility, we visualize the entire production process with full traceability, a key strategy to strengthen trust for automotive clients:
Demand Communication & Technical Evaluation: Professional engineers with automotive industry experience dock with clients to clarify technical requirements (dimensional tolerance, temperature resistance, assembly clearance), conduct mold flow analysis for automotive part characteristics, and optimize product structure to avoid potential assembly issues.
Automotive-Grade Mold Design & Manufacturing: Custom high-precision molds using S136/H13 wear-resistant mold steel; conduct strict mold testing and debugging with sample vehicles or assembly fixtures to ensure dimensional accuracy and assembly compatibility.
Material Pre-Treatment & Inspection: Select automotive-grade plastics (ABS, PC, PA, PP, TPO) from global top suppliers (Sabic, BASF, LyondellBasell); conduct strict material inspection (composition analysis, mechanical property testing); dry moisture-sensitive materials (PA, PC) to avoid defects such as bubbles.
Precision Injection Molding: Use automotive-specific intelligent injection molding machines to control molding parameters precisely; adopt sequential injection molding for complex-shaped parts to ensure uniform material filling; implement 100% online monitoring of key production links.
Demolding & Post-Processing: Smooth demolding with dedicated fixtures to avoid part deformation; remove gates and burrs; conduct CNC precision trimming if needed to meet strict dimensional requirements.
Automotive-Specific Surface Treatment: Implement processes such as anti-scratch matte painting (meeting automotive interior VOC standards), vacuum plating, and UV protection coating according to client requirements.
Comprehensive Quality Inspection: Use precision testing equipment such as CMM, 3D scanners, and environmental test chambers to inspect dimensions, surface quality, temperature resistance, and assembly performance; conduct random sampling for fatigue resistance testing.
Packaging & Shipping: Adopt automotive parts-specific anti-scratch, shockproof packaging (EPE foam, blister packaging, custom pallets); cooperate with international logistics companies with automotive parts shipping experience for global delivery.
Product Classification & Technical Parameters
3D Classification Table (Industry / Material / Part Type)
Industry Application | Material | Part Type | Remarks |
Passenger Car Industry | ABS, ABS+PC, TPO | Instrument panel clips, door trim panels, air outlet grilles, center console components | IATF 16949 compliant, low VOC, anti-scratch |
Commercial Vehicle Industry | PP, PA66+GF, ABS | Truck dashboard components, door handles, engine compartment brackets, air filter housings | High impact resistance, wear resistance, suitable for harsh working environments |
New Energy Vehicle Industry | Flame-retardant PC, PA66+GF, PP | Battery pack plastic components, charging port covers, motor housing accessories, cooling system parts | Flame-retardant grade V0, high insulation, temperature resistance (-40℃ to 150℃) |
Automotive Aftermarket | ABS, PP, TPO | Replacement interior trims, exterior mirror housings, bumper brackets, air conditioning components | Perfect matching with original parts, cost-effective, short delivery cycle |
Technical Parameters Table
Parameter Item | Specification | Remarks |
Processing Precision | ±0.01mm - ±0.05mm | Consistent for all automotive injection molded parts, achieved by precision injection molding + CNC trimming |
Material Range | Automotive-grade ABS, PC, PA6, PA66+GF (10-30%), PP, TPO, Flame-retardant PC/ABS | All materials pass SGS, RoHS, REACH certification; meet IATF 16949 material requirements |
Surface Treatment Options | Anti-scratch painting (matte/glossy), Vacuum plating, Silk screen printing, UV coating, Laser engraving | Painting meets automotive interior VOC standards; plating layer adhesion ≥ 4B |
Minimum / Maximum Size | Minimum: 5mm × 5mm × 2mm; Maximum: 800mm × 500mm × 200mm | Larger sizes available with custom large-tonnage injection molding machines (500-1000 tons) |
Production Cycle | Sample Order: 5-10 Working Days (including mold testing); Mass Production: 10-25 Working Days | Urgent orders supported with priority production (7-15 working days for mass production); suitable for automotive parts emergency replenishment |
Common Automotive Injection Molding Issues & Professional Solutions
Common Issues | Root Causes | Our Solutions |
Part Deformation Affecting Assembly | Uneven wall thickness, improper cooling, mold temperature inconsistency | Optimize part structure to ensure uniform wall thickness via mold flow analysis; design scientific cooling channels; use mold temperature controller to maintain consistent mold temperature |
Surface Defects (Sink Marks, Weld Lines) on Interior Parts | Insufficient injection pressure, low melt temperature, improper gate position | Increase injection and holding pressure; raise melt temperature for automotive-grade plastics; optimize gate position and add exhaust grooves; adopt sequential injection molding for complex parts |
Inadequate Temperature Resistance of Engine Compartment Parts | Inappropriate material selection, insufficient heat treatment | Recommend automotive-grade high-temperature resistant materials (PA66+GF, PPS); conduct heat treatment to improve material thermal stability; test parts in environmental test chambers (-40℃ to 150℃) |
Poor Adhesion of Surface Coating | Inadequate surface pre-treatment, improper coating selection | Implement plasma surface treatment to improve part surface energy; use automotive-specific coating matching the base material; control coating temperature and drying time strictly |
Successful Customer Case
Client Background: A well-known automotive interior system supplier in Germany, specializing in mid-to-high-end passenger car interior components, with strict requirements on product precision, VOC emissions, and delivery time (in line with automotive OEM production scheduling).
Client Demand: Custom automotive injection molded air outlet grilles for a premium passenger car model. Requirements: Material - ABS+PC; Processing precision - ±0.02mm; Surface treatment - anti-scratch matte painting (VOC compliant); Mass production order - 180,000 pieces; Delivery time - 20 working days.
Our Solutions: 1. Arrange a 5-person professional engineer team (with automotive interior parts experience) to dock with the client; conduct mold flow analysis to optimize the grille structure, avoiding weld lines and ensuring uniform wall thickness; 2. Select automotive-grade ABS+PC material from BASF, conduct strict VOC testing before production; 3. Adopt "precision injection molding + CNC trimming + plasma treatment + automotive-specific painting" integrated process; allocate 5 dedicated intelligent injection molding machines and 2 automatic painting lines for priority production; 4. Set up a special quality inspection team: use CMM for 100% dimensional inspection, conduct VOC sampling testing (meeting EU automotive interior standards); 5. Use custom anti-scratch blister packaging and pallets, cooperate with DHL for fast shipping to Germany, ensuring on-time delivery.
Cooperation Results: Products were delivered 1 day in advance, with a pass rate of 99.93%. The client's assembly test showed that the air outlet grilles had a 100% assembly qualification rate, and the VOC emissions were 20% lower than the EU standard. We have established a long-term strategic cooperative relationship, and the annual order volume has increased to 300,000 pieces, covering multiple interior component series for the client's premium vehicle models.
Our Core Competitiveness
With over 10 years of experience in automotive injection molding, we have formed five core competitive advantages tailored to the automotive industry:
Professional Technical Team: 15+ professional engineers with 5-15 years of experience, including 4 senior engineers specializing in automotive injection molding; familiar with global automotive industry standards (IATF 16949, EU automotive VOC standards); provide 24-hour technical response and one-stop solutions from product design to mass production.
Strong Production Capacity: The factory covers an area of 8,000+ square meters, equipped with 30+ advanced automotive-specific intelligent injection molding machines (50-500 tons) and 50+ CNC machining equipment; monthly production capacity of 600,000+ pieces, supporting large-batch orders and urgent replenishment needs of automotive OEMs.
Strict Quality Management System: Passed ISO9001:2015 and IATF 16949 automotive quality management system certifications; set up 3 independent quality inspection workshops, equipped with CMM, 3D scanners, environmental test chambers, and VOC testers; implement full-process quality control, ensuring product pass rate reaches 99.8%.
Comprehensive Service Guarantee: Support global shipping to 150+ countries and regions (cooperating with DHL, FedEx, and major sea freight companies with automotive parts shipping experience); professional customs clearance team familiar with automotive parts export procedures;
Why Choose Us?
Choosing [Your Company Name] as your automotive injection molded parts partner means choosing professionalism, precision, and reliability that match the rigorous requirements of the automotive industry. Here are the key reasons for global automotive clients to cooperate with us:
10+ years of focused experience in automotive injection molding, deeply understanding the technical requirements, quality standards, and production scheduling characteristics of the global automotive industry, avoiding trial and error costs for clients.
One-stop service covering automotive-grade mold design, injection molding, post-processing, and assembly, reducing clients' procurement and management costs, and ensuring consistent quality across the supply chain.
Quantifiable quality assurance (99.8% pass rate) and authoritative certifications (IATF 16949), ensuring products meet the access standards of global automotive OEMs and markets.
Flexible customization capabilities: support small-batch trial production (minimum order quantity 50 pieces) for new vehicle model development, and large-batch mass production for formal production, adapting to different stages of clients' product life cycles.
Professional foreign trade team with proficient English communication skills and rich experience in automotive parts international trade, providing 24-hour online service, and solving language, communication, and customs clearance barriers efficiently.
Proven successful cases in serving well-known automotive brands and interior suppliers in Europe, North America, and Asia, with rich experience in matching automotive OEM production schedules, ensuring on-time delivery.
Contact Us
If you have needs for custom automotive injection molded parts or want to know more about our products and services, please feel free to contact us. We will provide you with detailed product information, free quotes, and sample services within 48 hours. Looking forward to establishing a long-term and stable cooperative relationship with you to support your automotive product development and production!
