Our Standard Injection Molding Services
At Yigu Technology, our Standard Injection Molding services blend cutting-edge engineering with decades of expertise to deliver high-quality plastic parts at scale. Whether you need high-volume production for consumer electronics or precision components for medical devices, we leverage advanced custom tooling design, strict quality control, and a wide range of thermoplastic materials to turn your ideas into reliable products—on time, on budget, and up to the tightest industry standards.
What Is Standard Injection Molding?
Standard Injection Molding is a widely used plastic molding process that transforms raw thermoplastic materials into complex, consistent parts for mass markets. The process follows a repeatable cycle: first, plastic pellets are melted; next, the molten plastic is injected under high pressure into a custom mold cavity; after cavity filling, the plastic cools and solidifies; finally, the finished part is ejected.
This method excels at mass production (producing thousands to millions of parts) and precision manufacturing, with each molding cycle typically taking 10–60 seconds—making it one of the most efficient ways to create plastic components.
| Key Stage of Molding Cycle | Average Time (Seconds) | Purpose |
| Material Melting | 5–15 | Convert pellets to uniform molten plastic |
| Injection & Cavity Filling | 2–10 | Force plastic into mold to match part design |
| Cooling & Solidification | 3–30 | Harden plastic to retain shape |
| Ejection & Mold Reset | 1–5 | Remove finished part and prepare for next cycle |
Our Standard Injection Molding Capabilities
At Yigu Technology, we’ve built a full-service ecosystem to support every stage of your project—from prototyping to production. Our capabilities are designed to meet your unique needs, whether you’re launching a new product or scaling an existing line.
| Capability | Description |
| Injection Molding Expertise | 15+ years of experience with 50+ active machines (hydraulic/electric) |
| Custom Tooling Design | In-house tooling shop creates molds for complex geometries (tolerances ±0.005mm) |
| High-Volume Production | Capacity to produce 100,000+ parts/month per machine |
| Precision Engineering | Compliance with ISO 9001 and ISO 13485 for medical/automotive parts |
| Quality Control | 100% dimensional inspection (using CMMs) and material traceability |
| Rapid Prototyping | Turnaround of 3–5 days for prototype molds to test designs |
| Material Selection | Access to 20+ thermoplastic materials (ABS, PC, PP, etc.) |
| Project Management | Dedicated managers track timelines, costs, and quality milestones |
| Technical Support | Post-production assistance (assembly, packaging, and troubleshooting) |
The Standard Injection Molding Process
Our process is optimized for efficiency, consistency, and waste reduction—ensuring every part meets your specifications. Here’s a step-by-step breakdown:
- Material Preparation: Raw thermoplastic materials (pellets) are dried (if needed) to remove moisture, which prevents defects like bubbles. We use automated feeders to ensure consistent material flow.
- Mold Clamping: The mold (made of steel or aluminum) is clamped shut by the machine to withstand injection pressure (1,000–20,000 psi).
- Plastic Melting: Pellets are fed into a heated barrel (180–300°C) and mixed with a screw to create a smooth, molten plastic.
- Injection: Molten plastic is injected into the mold cavity at high speed to fill every detail (e.g., ribs, holes).
- Cooling: Water channels in the mold cool the plastic to its solidification temperature (varies by material—e.g., 120°C for PP).
- Ejection: Ejector pins push the solid part out of the mold.
- Post-processing: Parts may undergo trimming (to remove excess plastic) or surface treatment (e.g., painting, plating).
- Quality Inspection: Each batch is checked for dimensional accuracy and defects using tools like calipers or optical scanners.
We continuously focus on process optimization and cycle time reduction—for example, upgrading to hot runner systems has cut cycle times by 15% for our automotive clients.
Materials Used in Standard Injection Molding
Choosing the right material is critical to part performance. We offer a wide range of thermoplastics, each with unique properties to suit different applications.
| Material | Key Properties | Typical Applications | Density (g/cm³) | Melting Point (°C) |
| ABS | Impact-resistant, rigid, easy to paint | Consumer electronics (phone cases), toys | 1.05 | 180–210 |
| Polycarbonate (PC) | High strength, heat-resistant, transparent | Medical devices (syringe bodies), lenses | 1.20 | 220–250 |
| Polypropylene (PP) | Flexible, chemical-resistant, lightweight | Packaging (bottles), automotive parts (bumpers) | 0.90 | 160–170 |
| Polyethylene (PE) | Soft, durable, water-resistant | Household appliances (containers), pipes | 0.92 | 110–130 |
| Nylon (PA) | High tensile strength, wear-resistant | Industrial components (gears), sporting goods | 1.14 | 220–260 |
| Glass-filled plastics | Enhanced stiffness, heat-resistant | Automotive underhood parts, structural components | 1.30–1.60 | 170–250 |
| Recycled plastics | Eco-friendly, cost-effective | Non-critical parts (crates, bins) | 0.90–1.20 | Varies by base material |
Surface Treatment for Injection-Molded Parts
To enhance aesthetics, functionality, or durability, we offer a range of surface treatment options tailored to your part’s purpose.
| Treatment Method | Purpose | Ideal For |
| Mold finish | Create smooth/matte surfaces without extra work | Medical devices (hygiene), food containers |
| Texturing | Add grip or decorative patterns | Tool handles, automotive interiors |
| Polishing | Achieve a high-gloss finish | Cosmetic packaging, consumer electronics |
| Painting | Add color or UV protection | Toys, household appliances |
| Plating | Improve conductivity or corrosion resistance | Electrical connectors, automotive trim |
| Silk screening | Apply logos/text (high precision) | Electronics, promotional items |
| UV coating | Enhance scratch resistance | Phone screens, eyewear frames |
Tolerances: Ensuring Precision in Every Part
Tolerances (allowable deviations from the design) are critical for parts that need to fit or function with other components. Our precision molding processes achieve some of the tightest tolerances in the industry, supported by advanced measurement tools.
| Tolerance Type | Our Capability | Measurement Technique | Industry Standard |
| Dimensional accuracy | ±0.005mm | Coordinate Measuring Machine (CMM) | ±0.01mm |
| Geometric tolerancing (e.g., flatness) | ±0.02mm per 100mm | Laser scanner | ±0.03mm per 100mm |
| Tolerance stack-up | Minimized via CAD analysis | Finite Element Analysis (FEA) | Higher risk of fit issues |
We maintain compliance with ISO certification (ISO 9001 for general parts, ISO 13485 for medical) and use inspection equipment like optical comparators to verify every batch.
Advantages of Standard Injection Molding
This method offers unmatched benefits for manufacturers looking to balance quality, cost, and speed:
- High production efficiency: Produce thousands of parts per day with consistent output.
- Cost-effectiveness: Low per-unit costs at scale (tooling costs spread over high volumes).
- Consistent quality: Less than 0.5% defect rate for most projects (vs. 2–3% for other molding methods).
- Design flexibility: Create complex shapes (undercuts, thin walls) that are hard to achieve with 3D printing.
- Material versatility: Works with 20+ thermoplastic materials (including recycled options).
- Reduced waste: Scrap plastic (e.g., runners) is recycled back into the process (up to 95% material utilization).
- Fast turnaround: Production-ready in 2–4 weeks (after tooling approval).
- Scalability: Easily increase production from 10,000 to 1,000,000+ parts without sacrificing quality.
| Advantage | Our Performance vs. Industry Average |
| Production Efficiency | 15% faster cycle times |
| Defect Rate | 0.3% vs. 1.8% |
| Material Utilization | 92% vs. 85% |
| Turnaround Time | 2 weeks vs. 3–4 weeks |
Applications Across Industries
Standard Injection Molding is used in nearly every sector, thanks to its versatility. Below are our most common industry applications:
| Industry | Typical Parts Produced | Material of Choice |
| Automotive parts | Bumpers, dashboard components, sensor housings | PP, ABS, glass-filled PA |
| Consumer electronics | Phone cases, laptop hinges, charger housings | PC, ABS, PMMA |
| Medical devices | Syringe bodies, surgical instrument handles | Medical-grade PP, PC |
| Packaging | Bottle caps, food containers, cosmetic jars | PE, PP |
| Toys | Action figures, building blocks, doll parts | ABS, PE |
| Household appliances | Washing machine knobs, blender blades | PP, POM |
| Aerospace parts | Interior panels, wire harnesses | Flame-retardant PC, PA |
Advanced Manufacturing Techniques
We complement Standard Injection Molding with specialized techniques to solve complex challenges:
- Multi-shot molding: Inject two materials (e.g., soft rubber and hard plastic) in one cycle (ideal for grips).
- Overmolding: Add a second layer of material to an existing part (e.g., rubber over plastic for comfort).
- Insert molding: Embed metal parts (e.g., screws, pins) into plastic during molding (saves assembly time).
- Two-shot molding: Use two mold cavities to create parts with two colors or materials (fast, low waste).
- Family molds: Produce multiple part designs in one cycle (reduces cost for small parts).
- Hot runner systems: Keep plastic molten in the mold’s channels (cuts cycle time by 15–20%).
Our fleet includes 30 hydraulic presses (for high-pressure jobs) and 20 electric presses (for precision and energy efficiency)—covering part sizes from 0.1g to 5kg.
Why Choose Yigu Technology for Standard Injection Molding?
We stand out from competitors by focusing on your success—from design to delivery:
- Experienced team: 50+ engineers with average 8+ years in injection molding.
- Advanced technology: In-house tooling, CMM inspection, and AI-powered process monitoring.
- Reliable service: 98% on-time delivery rate (vs. industry average of 85%).
- Custom solutions: Tailor processes to your material, tolerance, and volume needs.
- Competitive pricing: Tooling costs 10–15% lower than global competitors.
- Strong R&D capabilities: Develop new materials (e.g., biodegradable plastics) for unique projects.
- Environmental responsibility: 70% of energy from renewable sources; 95% of scrap recycled.
Global reach: Serve clients in 25+ countries with localized support.