Injection Molding China for Custom Plastic Parts
ISO 9001:2015, ISO 13485:2016, ISO 14001:2015, IATF 16949
China-based injection molding company with full in-house solutions for insert molding and overmolding, delivering quality parts at competitive pricing. We protect your proprietary designs with strict confidentiality and controlled access throughout the project.
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- 98.5%on-time delivery
- 28M+parts shipped
Trusted by top global brands:
Our Capabilities
Ezramade is a china plastic injection molds manufacturer offering a one-stop service that includes mold design, prototyping, injection molding production, finishing, and certified quality assurance.
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Processes
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Materials
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Finishing Options
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Quality Documentation
Processes
Injection Mold Tooling
We produce high-quality parts using precision tooling, offering prototype tooling, bridge tooling, and production tooling options.
Secondary Operations
Injection molded parts go through selected secondary processes, such as trimming, polishing, coating, or texturing, according to project requirements and SPI Mold Surface Standards.
Final QA & Packaging
Our QC team conducts thorough inspections on the appearance and function of final plastic parts, followed by secure packaging and shipment to ensure molded parts arrive in perfect condition.
Materials
Supporting a wide range of materials
Supporting a wide range of materials
- ABS
- Acetal/POM
- ASA
- HDPE
- HIPS
- LDPE
- Nylon
- PEI (Ultem)
- PET
- PMMA (Acrylic)
- PBT Glass-Filled
- PEEK Glass-Filled
- Polycarbonate
- Polycarbonate Glass-Filled
- Polyethylene
- Polypropylene
- PPA
- PPO
- PPS
- PPSU
- PVC
- Rubber
- SAN (AS)
- Silicone
- TPE
- TPU
- TPV
- And more…
Finishing Options
- SPI A1
- SPI A2
- SPI A3
- SPI B1
- SPI B2
- SPI B3
- SPI C1
- SPI C2
- SPI C3
- SPI D1
- SPI D2
- SPI D3
- VDI 3400
Quality Documentation
- Certificate of Conformance (CoC)
- First Article Inspection (FAI)
- CMM Inspection Repor
- Material Test Report
- Material Certificate
- RoHS / REACH Declaration
- ITAR Compliance Documentation
- PPAP
- In-Process QC Records
- AQL Sampling Plan
Plastic Injection Molding Processes
We offers a variety of injection molding processes to meet different design, material, and performance needs. From micro-scale precision components to multi-material complex parts, our capabilities meet diverse industry standards, ensuring quality and cost efficiency.
Overmolding
An overmolding process where a softer material is molded over a rigid plastic part substrate to enhance grip, improve aesthetics, and add functionality in a single, integrated part.
Insert Molding
Plastic is molded directly around pre-placed inserts such as metal components, creating stronger integrated plastic parts while reducing secondary assembly steps.
Gas Assist Molding
Utilizes pressurized gas during the plastic injection molding cycle to form hollow sections, reduce weight, and improve dimensional stability in thick-walled parts.
Micro Molding
Precision injection molding process for extremely small and detailed plastic parts, such as small medical inserts, often used in medical devices, micro-mechanical systems, and electronics.
Liquid Silicone Rubber Molding
An injection molding process using liquid silicone rubber to produce flexible, durable, and biocompatible parts, suitable for medical, automotive, and high-performance consumer products.
Multi-Shot Molding
Advanced plastic injection molding technology combines multiple materials/colors in one cycle, producing complex, multi-functional, and visually appealing parts.
Injection Molding Materials
We help you select cost-effective materials without compromising performance, ensuring high-yield, zero-defect of plastic injection molded parts.
Injection Molding Capabilities
Injection Molding Capabilities
- Maximum Part Size
- Minimum Part Size
- Part to Part Repeatability
- Mold Cavity Tolerances
- Volume Capacity
- Depth from Parting Line
- Machine Press Range
- Machining Tolerance
US
- Maximum Part Size
- 47.2 x 39.4 x 23.6 in.
- Minimum Part Size
- 0.2 x 0.2 x 0.2 in.
- Part to Part Repeatability
- ±0.0039 in.
- Mold Cavity Tolerances
- ±0.0008 in.
- Volume Capacity
- ≤ 59 in³
- Depth from Parting Line
- ≤ 7.87 in.
- Machine Press Range
- 50–3000+ tons
- Machining Tolerance
- ±0.003 in.
Metric
- Maximum Part Size
- 1200 × 1000 × 600 mm
- Minimum Part Size
- 5 × 5 × 5 mm
- Part to Part Repeatability
- ±0.1 mm
- Mold Cavity Tolerances
- ±0.02 mm
- Volume Capacity
- ≤ 966,837 mm³
- Depth from Parting Line
- ≤ 200 mm
- Machine Press Range
- 50–3000+ tons
- Machining Tolerance
- ±0.08 mm
Injection Molding Secondary Operations
Our secondary operations for injection-molded parts include mold texturing, heat staking, laser engraving, silk screening, ultrasonic welding, and assembly, all compatible with commonly used molded plastics for optimal function and appearance.
Heat Staking
Embeds inserts or fasteners with localized heat.
Laser Engraving
Adds permanent part numbers, logos, or QR codes.
Silk Screening
Prints simple graphics or labels on flat surfaces.
Ultrasonic Welding
Joins plastic parts securely using high-frequency vibration.
Assembly
We provide precision assembly with threaded inserts for strong, repeatable fastening.
From Prototypes to Production
Ezra covers every stage of your product lifecycle, from rapid prototyping to small batches and high volume production, offering an on-demand manufacturing tool, cost-effective solutions, and fast lead times.
Prototyping Injection Molding
Start fast with Ezra’s prototyping services using 3D printing, CNC machining, or soft tooling. Ideal for design validation and functional testing before committing to tooling.
- Quantity: 1-100 pcs
- Lead Time: 1-7 days
- Free Lifetime Tooling Maintenance
- Flexible prototyping with multiple methods
Low Volume Injection Molding
We use aluminum tooling and rapid molding techniques to deliver cost-effective, short-run parts with high precision. Perfect for pilot production or bridging the gap to full-scale manufacturing.
- Quantity: 100–10,000 pcs
- Lead time: 3–5 weeks
High Volume Production
Ezra specializes in high-volume injection molding with competitive pricing. We offer over 100+ thermoplastic and thermoset materials, supporting even the most demanding production needs.
- Quantity: 10,000+ pcs
- Lead time: 4–7 weeks
- Competitive pricing for mass production
Why Teams Choose Ezra Over Platforms
Standard
- Free DFM + Moldflow
- Insert / Overmolding
- Family Mold Support
- Secondary Processing
- No MOQ
- T1 in 2–3 weeks
- Free Lifetime Tooling Maintenance
- 100+ Plastic Materials Available
- In-house Production
- Competitive Pricing
- Free DFM + Moldflow
- Insert / Overmolding
- Family Mold Support
- Secondary Processing
- No MOQ
- T1 in 2–3 weeks
- Lifetime Tooling Maintenance
- 100+ Plastic Materials Available
- In-house Production
- Competitive Pricing
Competitor
- Free DFM + Moldflow
- Insert / Overmolding
- Family Mold Support
- Secondary Processing
- No MOQ
- T1 in 2–3 weeks
- Lifetime Tooling Maintenance
- 100+ Plastic Materials Available
- In-house Production
- Competitive Pricing
From Confidential Files to Reliable Parts
Ezra combines engineering support with strict confidentiality and secure tooling management to take your project from upload to production.
Secure File Handling
We protect your CAD files and drawings with strict confidentiality protocols. From NDA support to access-restricted project views, your intellectual property stays secure throughout the manufacturing process.
- NDA available upon request
- Encrypted file uploads
- Internal-access only policy
Secure Tooling Control
We clearly define tooling ownership and keep your mold securely stored and tracked. Tooling is uniquely labeled and fully documented, with lifetime free mold maintenance.
- Tooling ownership
- Secure storage
- Lifetime maintenance
Fast and Flexible Prototyping
Validate designs quickly with our rapid prototyping option, including 3D printing, CNC machining, and soft tooling, to accelerate every stage of the product development cycle.
- 3D print, CNC, or soft mold options
- Lead time as fast as 1–2 weeks
- Small-batch or one-off production
Factory Price at Scale
With in-house tooling and injection molding, we offer unbeatable pricing on high-volume orders. Get consistent quality control and global delivery without the middlemen.
- 100+ plastic material options
- Capacity for 10k+ parts/month
- Lower cost per part with volume
How Custom Plastic Injection Molding Works
Custom plastic injection molding service starts with creating a highly accurate machined mold that matches the customer’s design specifications. This mold is installed in an injection molding machine, where the injection unit heats raw plastic material until it becomes molten. Under controlled pressure, the molten plastic is injected into the mold cavity, filling every detail.
Once filled, the mold is cooled to solidify the plastic. The machine then opens the mold to produce parts with consistent dimensions and surface quality. This process can be repeated thousands or even millions of times, ensuring cost-effective production. From prototyping to full-scale manufacturing, custom plastic injection molding delivers precise, repeatable results for a wide range of applications.
Industries We Serve
EzraMade’s clients come from multiple industries. Whether you produce medical devices, cars, or consumer goods, you'll find us to be a reliable injection molding partner. Our injection molding services are designed for ultimate predictability in costs and quality.
Customer-Authorized Cases
Custom Eyeshadow Palettes
A startup beauty brand used EZRA Made's injection molding. It cut lead times, costs, and improved part quality. EZRA Made did no-MOQ custom molding and rapid prototyping, from CAD to mold. After quick tooling, parts were injected and assembled. This brought fast production and short revision intervals.
Custom Cannabis Pre-Roll Packaging
Dive into our case study on eco-friendly pre-roll tubes for cannabis. Preserve freshness & elevate luxury—contact for custom cannabis packaging today!
Bicycle Bottle Cage Adapter
This custom-designed bottle cage adapter was 3D printed using black Nylon (PA12) via Selective Laser Sintering (SLS). The part showcases a lightweight lattice design optimized for strength and flexibility, ideal for aftermarket bike accessories. The fine surface texture and dimensional stability make it suitable for real-world outdoor use, ensuring reliable grip and performance under load.
Material: PA12 Nylon
Surface: As-printed, matte textured finish
Golf Club Head
This golf club head was part of a prototype project for a new player-focused design. The client sent the CAD file with a lattice-filled cavity. We printed it in stainless steel using DMLS. After two quick iterations, adjusting wall thickness and face weight, it was approved for swing testing. The whole process took under three weeks from file to functional part.
Dual-Shot Molded Counter Housing for Electronic Assembly
This electronic counter features a dual-color injection molded housing with integrated mounting structures for PCB and display components. Designed for handheld use, the part combines aesthetic surface finish with functional rigidity, enabling quick assembly and reliable performance in compact electronics.
Hybrid Globe Assembly with Metal-Plastic Integration
This custom globe combines precision-injected plastic and machined metal parts, with a clean USB-C charging port embedded in the base. The structure is designed for both visual appeal and durability, using multi-material assembly and post-finishing to ensure tight fit, surface alignment, and seamless rotation. A typical application of decorative product manufacturing with functional components.
Metal Home Decor
This piece was printed in stainless steel using DMLS, designed as a decorative object for modern interiors.
Precision CNC-Machined Tumbler for Double-Wall Drinkware
This stainless steel tumbler was CNC machined from dual-layer 304 stainless steel and finished with two distinct textures—satin brushing and snow-like bead blasting. Engineered to maintain consistent wall thickness for insulation and fluid aesthetics, the part showcases both functional precision and poetic design. The open-mouth shape and engraved bird detail reflect the client’s minimalist brand vision rooted in eastern elegance. ——Published with customer permission
Silicone-Overmolded Plastic Jar for Cannabis Packaging
This airtight container integrates a rigid transparent plastic body with a soft-touch silicone overmolded lid, designed for cannabis storage and retail packaging. The playful “drip” visual design is achieved through precision overmolding, ensuring brand recognition while maintaining seal integrity and user-friendly handling.
Aluminum Mounting Kit for Drone Cinematography
This CNC-machined aluminum accessory kit for DJI Mavic 4 Pro includes handheld grips, extension arms, and mounting brackets for professional aerial and handheld shooting. Each part is precisely milled for strength, lightweight handling, and modular compatibility with camera rigs and NATO rail systems. ——Published with customer permission
Anodized Aluminum Clamp for Folding Bike Assembly
This folding bike seat post clamp was CNC machined from aluminum alloy and finished with black anodizing and laser-etched markings. Designed for both durability and aesthetics, it features smooth contours and precision threads for easy locking and long-term outdoor use. ——Published with customer permission
Display Enclosure with Embedded Metal Inserts
This monitor housing was produced using insert molding, integrating metal fasteners directly into the injection-molded plastic shell. The result is a rigid, durable assembly that simplifies downstream installation and improves long-term structural integrity. Ideal for consumer electronics with high-precision assembly needs.
Multi-Tool Blades and Components for Outdoor Use
This stainless steel multi-tool features CNC-machined blades, saws, and pliers with brushed or sandblasted finishes for durability and corrosion resistance. Precision pivots and locking points ensure reliable deployment in camping, automotive, and emergency scenarios. ——Published with customer permission
Why Choose Us
End-to-End Injection Molding Solutions
From DFM analysis and mold flow simulation to tooling, sampling, and final production, we manage every stage in-house, ensuring precision, speed, and full traceability.
Fast Lead Times
We deliver T1 samples in just 2–3 weeks, keeping lead time short and helping reduce cost, even for insert or overmolding projects with multi-cavity tools.
Full-Cycle Production Support
Get expert consultation with every injection mold quote, plus a dedicated project manager on each order to guide your parts from design to production smoothly.
Certified Quality & Global Delivery
ISO-certified processes, real-time QC reports, and CMM inspections guarantee consistency — with reliable shipping to over 120 countries.
What Our Customers Say About Us
We’ve delivered thousands of parts across industries with reliable quality, on-time delivery, and consistent customer satisfaction. Our focus on precision and continuous improvement has earned long-term trust from partners worldwide.
1,000+
MOLDS MANUFACTURED
20,000+
CUSTOMERS SERVED
98.5%
ON-TIME DELIVERY
28M+
PARTS DELIVERED
EZRA has been an exceptional partner, providing expert engineering support and high-quality injection molding services. Their team helped us turn our proof-of-concept designs into successful production runs, on time and within budget.
Mark R.
Founder
How Does Injection Molding Process Work
Request a Quote & DFM Review
Send us your part requirements and receive a quote within 24 hours. Our engineers will also provide a free DFM report to flag any design issues early.
Mold Design & Flow Simulation
We create your mold design and run mold flow analysis to optimize material flow, cooling, and part quality.
Tooling & T1 Sample
We begin tooling using premium-grade materials. T1 samples are delivered within 2–3 weeks for your inspection and approval.
Low-Volume Production
Once the sample is approved, we move into production — with full traceability, precision machining, and on-site QC inspection.
Final QA & Secure Delivery
Our QC team performs strict final inspections.
Parts are securely packaged and delivered worldwide through trusted logistics partners.
Partnerships Built Over Time
Most of our clients come back with more projects. Here’s what they’ve said about working with us on parts that needed to be done right.
Tooling we can count on
We’ve ordered several mold tools from EZRA for our automotive components. Communication is clear, schedules are kept, and the tools have run reliably in series production. That consistency is why we keep coming back.
Cosmetic housings with consistent fit and finish
For our concealer line, we needed sleek, precise housings that feel right in hand. EZRA delivered molds that met both the look and the functional tolerances. Quality and delivery have been steady across multiple runs.
Delivered on schedule
We’ve worked with EZRA across multiple car mod parts. From ECU housings to vented seat units and lane-change sensors. Each time, their injection team helped us iterate fast and get stable parts ready for actual road use. Still working with them today.
Injection molds that stand up to the road
We’ve relied on EZRA for a range of aftermarket car parts, from ECU housings to vented seat inserts and blind-spot sensor covers. Every time, their team iterates fast and delivers tools that run smoothly in real-world driving. We’re still sending them new projects today.
Seamless scale-up from prototype to production
EZRA joined us at concept stage for the 5Pro line and stayed through full-scale manufacturing. Their injection-molding team responded quickly, kept tolerances tight, and every molded frame dropped straight into our assembly line.
Download our Injection Molding Guide!
Understand how to select the right resin, optimize part design, and reduce lead time from tooling to production.
Tell us about your project!
Injection Molding FAQs
What are the advantages of plastic injection molding?
Plastic injection molding offers high production efficiency, consistent part quality, and low cost per unit for large volumes. It supports complex shapes, a wide range of materials, and allows for repeatable precision in every cycle. Injection molding parts also generally perform better than parts made by CNC machining or 3D printing from the same material.
Can you help me design my product?
Yes, our engineers can assist with design optimization and manufacturability recommendations.
How does EZRA protect my intellectual property?
We ensure all files are handled securely and are happy to sign NDAs upon request.
Do you offer free mold maintenance?
Yes. We provide free lifetime mold maintenance.
What’s the difference between prototyping and mass production?
Prototyping is used for quick iterations in low volumes, while mass production uses hardened molds for higher volume and consistency.
What is your minimum order quantity (MOQ)?
We have no minimum order quantity. For projects that move into full-scale production, we refund the mold-making cost.
How can I design injection molded parts for lower cost and easier production?
To optimize plastic parts for cost and manufacturability, use thinner walls to shorten cycle time and reduce material use, but keep wall thickness even to prevent sink marks and voids. Add ribs at 40–60% of wall thickness for strength, and keep bosses around one-third of wall thickness. Avoid complex features like undercuts, which make tooling more expensive and harder to eject, and consider design techniques such as pass-thru coring to minimize them.
How do you ensure the quality of injection molded parts made in China?
All parts are inspected through a strict quality control process, including incoming material checks, in-process monitoring, and final dimensional and visual inspections. For high-volume runs, we follow international standards (ISO/ANSI/AQL sampling) to guarantee consistency. This ensures every part meets customer specifications before shipment.
Do I need to handle customs duties or taxes when ordering from China?
No. All customs duties and taxes are included in our pricing, so you don’t need to worry about extra fees or paperwork.
Who owns the mold and tooling after payment?
Once the tooling invoice is paid in full, the mold and tooling are customer-owned. We label each tool with a unique ID and store it under controlled access. Upon request, we can provide supporting records such as photos, ID logs, and maintenance history.
Can you sign an NDA and restrict access to my files?
Yes. We can sign an NDA before receiving your CAD files or project details. Internally, we follow strict confidentiality practices and limit access to only the team assigned to your project. We do not share files with third parties without your approval.
Do you ever reuse customer molds or designs for other projects?
No. We do not reuse customer-owned molds, designs, or project data for other customers. Your tooling and files are treated as confidential and used only for your project, with controlled access and clear internal handling procedures.
