Plastic Injection Molding Services｜DAYIN Vietnam

DAYIN is a trusted global plastic injection molding company that delivers end-to-end solutions that span from initial design, tooling, and mold fabrication, to mass production, post-processing, and electronic assembly. 

Whether you need manufacturing services for automotive, electronics, consumer products, or more, DAYIN’s China and Vietnam plastic injection molding facilities will provide flexible, cost-effective production with fast lead times, as we support businesses worldwide.

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What is Plastic Injection Molding: Overview & Benefits

Plastic injection molding is a manufacturing process where melted plastic resin is injected into a precision-engineered mold, then cooled and solidified to form the final part. This method is widely used for producing large volumes of identical plastic components with tight tolerances and high repeatability.

Moreover, this process offers high production speed, minimal material waste, and low cost per unit. It is also popular due to its ability to create complex or custom shapes using a wide range of materials.

If you want a deeper look into how the process works, you can read our detailed guide here:
Injection Mold Manufacturing: What is It & How Does It Work? 

Why Choose DAYIN for Custom Injection Molded Plastics?

DAYIN stands out as a reliable partner for custom plastic injection molding by combining speed, quality, innovation, and sustainability across every stage of production. Here’s what you can expect when working with us:

	Fast and Flexible Manufacturing Equipped with advanced plastic injection machines ranging from 60 to 1,200 tons, DAYIN can efficiently produce everything from small intricate parts to large, complex components. Our streamlined processes ensure rapid delivery—typically within 35 to 50 days from concept to completion. Furthermore, our clients benefit from fast quotes and tailored solutions, with a team that actively listens to customer needs and adapts accordingly.
	Dual Production Locations for Global Reach DAYIN operates two manufacturing bases in Guangdong, China and Bac Ninh, Vietnam. With a combined factory space of over 50,000 square meters, we possess the resources tokid handle substantial production volumes while maintaining optimal costs. This geographical diversification also enhances supply chain resilience and flexibility for our global clientele.
	Rigorous Quality Control Standards Committed to ISO 9001 and multiple industry standards, DAYIN conducts extensive in-house testing through our dedicated laboratories. Our comprehensive quality checks include precise size detection, thorough material analysis, and accurate three-dimensional measurements. Additionally, our labs run tests for battery, packaging, material, and product reliability, alongside environmental simulations such as temperature and humidity cycling, and aging tests. This meticulous approach guarantees the superior quality and durability of our plastic molded parts.
	Skilled R&D for Innovation DAYIN’s dedicated R&D team continuously explores new materials and processes to enhance product performance and manufacturing efficiency. We also actively develop cutting-edge product features and even integrate app functionalities, leveraging our extensive patent portfolio. By focusing on these technological advancements, we ensure our client’s product stays competitive in a fast-changing market.
	Cost Optimization for Exceptional Value Through advanced planning, scalable production, localized sourcing, and waste-minimizing, DAYIN provides competitive pricing without compromising on quality. This makes our services ideal for businesses seeking long-term value in their custom plastic injection molding needs.
	ESG Commitment Choosing DAYIN means partnering with a responsible and forward-thinking organization, as we are committed to Environmental, Social and Governance (ESG) initiatives. We actively pursue sustainable practices by increasing our use of recycled eco-friendly materials (aiming for 30%), utilizing 100% renewable energy, and striving for a 30% reduction in carbon emissions. In terms of governance, we significantly increase our R&D investment annually and prioritize employee welfare. Socially, we are dedicated to providing employment opportunities for individuals with disabilities and actively participate in social welfare activities, contributing to the creation of industry employment.

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Our Plastic Injection Molding Capabilities

Scientific Molding Techniques

At DAYIN, we leverage data-driven methodologies and advanced process controls to ensure consistent, high-quality results in all projects. Our scientific molding techniques include:

• Mold Flow Analysis: This stimulates material behavior inside the mold, helping identify optimal gate locations, wall thicknesses, potential defect zones, and more. As such, we can fine-tune manufacturing parameters early to minimize issues like warpage, sink marks, or deformation.
• Real-Time Parameter Monitoring: This ensures that critical injection variables—such as pressure, temperature, and fill rate—stay within tightly controlled tolerances. As a result, we provide stable, repeatable processes while minimizing costly rework or waste.
• Aluminum Mold Advancement: Our pioneering aluminum mold development further supports scientific molding by offering faster cooling times and shorter cycle durations. Plus, these molds are easy to machine and repair, accelerating turnaround and enhancing flexibility during product planning.
• Systemic Employee Training: With a comprehensive database from these cutting-edge processes, we develop standardized programs to ensure every technician understands and applies scientific molding principles, reducing reliance on individual experience and improving overall efficiency.

By integrating these practices, DAYIN delivers precision-molded parts that meet the strictest quality and performance requirements.

Size and Tolerances

At DAYIN, our plastic injection molding capabilities accommodate a wide range of part sizes. Here is a basic part size guideline for our smallest and largest machines:

DAYIN typically maintains a machining tolerance of +/- 0.003 inches (+/- 0.08 mm) for our molds, while the resin tolerance for the molded plastic parts is generally within +/- 0.002 inches per inch (+/- 0.002 mm per mm).

Nevertheless, these are general guidelines. Actual achievable part sizes and tolerances can vary depending on the specific part design, material used, and complexity of the plastic injection mold. Please consult with our team for detailed specifications for your project. 

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Our Plastic Injection Molding Material Options

Source: Freepik

DAYIN has a comprehensive selection of thermoplastic materials to meet the diverse requirements of our clients’ injection molding projects. Here are some of the most common options:

• Acrylic (PMMA): A transparent plastic with excellent optical clarity and UV resistance. Ideal for light covers, displays, and lenses.
• Acrylonitrile Butadiene Styrene (ABS): Known for strength, impact resistance, and machinability. Commonly used in automotive parts, enclosures, and consumer goods.
• Nylon (Polyamide, PA): Offers high mechanical strength, wear resistance, and thermal stability. Great for gears, bearings, and automotive components.
• Polycarbonate (PC): A tough, impact-resistant material with high transparency. Suitable for protective gear, lighting lenses, and electronic housings.
• Polyethylene (PE): Lightweight and chemically resistant, available in various densities. Common in containers, packaging, and piping systems.
• Acetal (Polyoxymethylene, POM): Also called acetal, it provides high stiffness, low friction, and excellent dimensional stability—ideal for gears, locks, and precision parts.
• Polypropylene (PP): Offers fatigue resistance and flexibility at low cost. Frequently used in hinges, caps, and food containers.
• Polystyrene (PS): Rigid and economical, often found in disposable packaging, CD cases, and lightweight structures.
• Thermoplastic Elastomer (TPE): Combines rubber-like flexibility with thermoplastic processing. Used for soft-touch grips, seals, and overmolding.
• Thermoplastic Polyurethane (TPU): Provides elasticity, abrasion resistance, and toughness. Common in protective cases, footwear, and flexible tubes.

Throughout our collaboration, DAYIN’s experienced team can assist you in selecting the optimal thermoplastic material for your specific application, considering factors like mechanical properties, environmental conditions, and cost requirements.

Plastic Injection Molded Products by DAYIN

From everyday household items to specialized automotive and electronic components, DAYIN’s injection molding expertise helps bring innovative products to life across global markets in diverse industries.

Automotive 

We produce complex and functional parts such as headlights, taillights, rearview mirrors, dashboards, air vents, and cup holders, helping automotive brands meet safety, style, and ergonomic standards.

3C Electronics 

From keyboards and USB drives to All-in-One PC housings and mice, our molded components support the compact design and functional integrity needed for modern digital devices.

Commercial Electronics 

We support smart business solutions with durable enclosures and structural parts for equipment like self-service ordering kiosks. This allows retail stores to create user-friendly digital interfaces for their customers.

Household Appliances 

DAYIN manufactures injection-molded parts for robotic vacuum cleaners, bread makers, soap dispensers, humidifiers, and essential oil diffusers, enhancing both function and design in the home.

Pet Supplies 

Products like auto pet feeders and pet cooling fans reflect our expertise in safe, reliable plastic parts for animal care and comfort, which also offer convenience for pet owners with busy lifestyles.

Tableware 

We use food-grade materials to produce straw cups, plates, food storage jars, water bottles, cleaning spray bottles, and ice cube trays, meeting health and safety standards for everyday use.

Sporting Goods

Our capabilities extend to plastic components used in darting, golf, basketball, table tennis, and cycling equipment, supporting performance and durability in sports gear.

Clients We Served

DAYIN is proud to collaborate with numerous leading brands. For instance, the corporations below represent just a few of our valued clients who have trusted us to deliver high-quality plastic injection molded solutions. Their success is a testament to our commitment to precision, innovation, and reliable manufacturing. 

DAYIN’s Plastic Injection Molding Process

	1. Design Consultation  Our engineering team works closely with clients to optimize product and mold designs through design for manufacturability (DFM) support, ensuring they are not only functional but also production-ready.  We also leverage advanced Computer-Aided Design (CAD) and Computer-Aided Manufacturing (CAM) technologies to visualize and refine part designs. This proactive approach shortens development cycles, bringing high-quality plastic parts to market faster.
	2. Prototyping and Functionality Testing DAYIN understands the importance of validating designs before committing to full-scale production. We allow the creation of physical prototypes for feature testing. This crucial step enables clients to identify and address any potential design flaws or performance issues early on. Through trial production runs, we further refine the manufacturing process and ensure the plastic injection mold design meets the required specifications. This also reduces costly revisions for a smoother transition to mass manufacturing.
	3. Precision Tooling and Mold Fabrication Our in-house tooling components and plastic injection mold fabrication capabilities include CNC machining, Electrical Discharge Machining (EDM), milling, and grinding.  These precision processes ensure every plastic injection mold is tailored to meet specific production requirements, resulting in consistent part quality and extended mold life.
	4. Injection Molding Parts Production DAYIN offers different techniques to fulfill diverse product needs. Our standard one-shot injection molding is ideal for efficiently producing high volumes of single-material parts.  For more complex applications, we provide over-molding, where a soft or rigid material is layered over a base component for enhanced grip, durability, or aesthetics. We also specialize in insert molding (also known as two-shot or multi-shot molding), which involves molding plastic around pre-inserted metal or other materials to create fully integrated, multi-functional parts.
	5. Secondary Processing for Injection Molding Parts DAYIN offers a wide array of secondary processing services to enhance the appearance, functionality, and branding of plastic injection molded parts. Our surface treatment capabilities include screen printing, pad printing, hot stamping, laser engraving, and custom painting to meet specific design or aesthetic goals.  We also provide various surface finish options, from basic non-cosmetic textures to high-gloss, precision-polished surfaces following industry-standard Mold-Tech and SPI classifications.
	6. Injection Molded Product Assembly With advanced automated assembly lines and skilled management teams, we ensure quick and accurate product assembly.  From simple component fitting to complex multi-part integration, our turnkey solutions help reduce time-to-market and manufacturing costs while maintaining consistent performance and product quality.
	7. International Shipping to the USA and Worldwide Destinations  DAYIN offers reliable global shipping services to the USA, Japan, Korea, Europe, and many other regions. Our standard method is sea freight for cost-effective bulk transport, but we also accommodate alternative options based on your delivery timeline and logistics preferences.  Rest assured, we will work closely with you to ensure your products arrive safely and on schedule, wherever your business is located.

Reach Out to DAYIN for High-Quality Plastic Injection Molding

Whether you need precision parts, expert mold design, or full-scale production support, DAYIN is here to help bring your ideas to life with reliable plastic injection molding solutions. Contact our team today to discuss your project requirements, get a quick quote, and learn more about our comprehensive manufacturing capabilities.

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Frequently Asked Questions

Q1. What are the challenges of plastic injection molding?

Plastic injection molding can present challenges like high startup costs, material degradation, part deformation, and mold wear. Additionally, factors such as improper material selection and design issues can affect the final product’s quality. 

DAYIN tackles these challenges with our expertise in scientific molding techniques, optimizing processes to maintain exceptional part quality while minimizing defects like warping or flash. 

Q2. How much does plastic injection molding cost?

The cost of plastic injection molding at DAYIN varies depending on factors like part geometry, design complexity, material selection, and tooling. The most significant expense is the initial investment in tooling, which can range from $3,000 to over $100,000.

Furthermore, the cost per unit decreases with larger production runs, but it’s important to discuss your specific project with DAYIN to receive a tailored quotation based on your needs.

Q3. What is the typical lead time for plastic injection molding services?

At DAYIN, we offer a faster lead time of 4-8 weeks from development to production, thanks to our advanced equipment and efficient processes. 

In comparison, fully custom injection molding projects typically take 6-10 weeks, with 4-6 weeks dedicated to mold development and fabrication, followed by 2-4 weeks for part production.