ZDOITD.com | Precision Injection Molding & Mold Making Services from China

We Are Zhengda

Founded in 1996 in Weifang, China, Weifang Zhengda Industrial Co., Ltd. is a high-tech enterprise specializing in precision injection molding, mold fabrication, and CNC machining.

28+ Years of Excellence

With over 28 years of experience, 600+ skilled professionals, and a 40,000+ sqm facility, we deliver high-precision plastic and silicone injection parts for industries including medical, automotive, electronics, and consumer goods.

Our clients include Goertek, with final customers such as Apple, Huawei, Amazon, Google, HP, Samsung, Sony, Xiaomi, and Foxconn — leaders in innovation and technology.

ISO-Certified Manufacturing
500+ Successful Projects Delivered
Exported to 7+ Countries Worldwide
In-House Mold Design & CNC Machining

Our Core Services

Full-service manufacturing from mold design to finished product.

Mold Design

Custom plastic injection mold design using advanced CAD/CAM tools for optimal performance and cost-efficiency.

Mold Making

High-precision mold fabrication with tight tolerances, suitable for medical, automotive, and electronics applications.

Injection Molding

Plastic & silicone injection molding with capabilities in IML, two-shot, and overmolding technologies.

Secondary Process

Complete surface treatments including painting, plating, laser marking, ultrasonic welding, and assembly.

Featured Products

High-precision injection molded parts and molds for diverse industries.

Plastic Snus Can

Custom-designed, durable plastic container for tobacco products with precision molding.

Snus Can Mold

High-cavity injection mold for mass production of snus containers.

Insulin Pump Protective Case

Medical-grade precision-molded case with IML labeling for durability and branding.

Automotive Injection Parts

Interior and exterior components with high thermal and impact resistance.

IML (In-Mold Labeling)

Integrated labeling during molding for scratch-resistant, high-quality finishes.

CNC Machining Service

Precision metal and plastic part machining for prototypes and production.

Medical Industry Molding

ISO-compliant parts for devices, diagnostics, and surgical tools.

Plastic Rapid Prototype

Fast-turnaround prototyping using 3D printing and soft tooling.

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How We Work

A seamless process from concept to delivery.

1

Design & Engineering

We collaborate with your team to optimize part design, material selection, and mold flow analysis.

2

Mold Fabrication

Precision CNC machining, EDM, and polishing to create durable, high-performance molds.

3

Production & Delivery

Injection molding, quality inspection, secondary processes, and global shipping.

Frequently Asked Questions

What materials do you work with?

We process a wide range of thermoplastics including ABS, PC, PP, PE, PA, POM, PMMA, and medical-grade materials. Silicone is also available for soft-touch and medical applications.

Do you offer mold repair services?

Yes, we provide comprehensive injection mold repair, maintenance, and refurbishment services to extend mold life and reduce downtime.

What industries do you serve?

We serve medical, automotive, consumer electronics, smart wearables, home automation, and industrial equipment sectors.

Can you handle small and large production runs?

Absolutely. We support prototyping, low-volume, and high-volume production with scalable capacity and flexible tooling options.

Get in Touch

Ready to start your next project? Reach out to our team for a free quote or technical consultation.

Company: Weifang Zhengda Industrial Co., Ltd.
Founded: 1996
Location: Weifang, Shandong, China

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Precision Injection Molding Since 1996