Secondary Operations

At NZK Plastics, our commitment to excellence extends beyond the initial molding process. We offer a suite of secondary operations to enhance, refine, and complete your products. Whether it's joining parts through sonic welding, assembling components, or adding precise holes via drilling and tapping, our team ensures that every detail is executed with precision. With our comprehensive secondary operations, we provide the finishing touches that elevate the quality and functionality of your products.

Learn More About Our Secondary Operations

• Sonic Welding:

Achieve strong, seamless joints with our sonic welding services. Utilizing ultrasonic vibrations, we fuse plastic components together, ensuring a durable and aesthetically pleasing bond. This method is ideal for creating watertight seals and joining complex parts without the need for adhesives or fasteners.

• Assembly:

Streamline your production process with our expert assembly services. Our team meticulously assembles components, ensuring that each part fits perfectly and functions as intended. From simple to complex assemblies, we handle every project with care and precision.

• Drilling and Tapping:

Precision is paramount when it comes to drilling and tapping. Our team utilizes advanced equipment to create accurate holes and threads in molded parts. Whether you need precise holes for fasteners or intricate threading for assembly, we ensure consistency and accuracy in every operation.

• Solvent Welding:

For a clean and strong bond, our solvent welding services are the ideal choice. By using specialized solvents, we chemically bond plastic parts together, resulting in a joint that’s as strong as the surrounding material. This method is perfect for creating clear, unobtrusive joints in transparent plastics.



With NZK Plastics handling your secondary operations, you can be assured of a finished product that meets the highest standards of quality and functionality. Our attention to detail and commitment to perfection ensure that every operation adds value to your products.


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    What Our Clients Are Saying

    NZK Plastics, LLC has been our go-to injection molding partner for years. Their attention to detail and commitment to quality is unparalleled. Highly recommended!

    John D. Automotive Industry

    We've worked with NZK Plastics on several critical projects, and they've always delivered on time and within budget. Their engineering services are top-notch, helping us optimize our designs for better

    Sarah L. Medical Devices Manufacturer

    NZK Plastics is incredibly responsive and knowledgeable. They helped us navigate material selection and even suggested design modifications that saved us money.

    Mike H. Consumer Electronics

    Sustainability is a big focus for us, and NZK Plastics was more than accommodating. They helped us select eco-friendly materials without compromising on quality. Truly a forward-thinking company!

    Karen S. Renewable Energy Industry

    We specialize in custom injection molding, part design and modification, tool development, process optimization, and rapid prototyping. Our engineering solutions are comprehensive and tailored to meet your specific needs.

    We have been in the plastics industry for over 20 years, providing top-quality injection molding solutions to a diverse range of clients.

    We work with a wide range of materials, including commodity resins like PE, PP, PS, ABS, PC, and Acetal, as well as high-end engineering resins like LCP, PPS, and COP.

    Yes, we offer a variety of engineering services including SolidWorks CAD design, part design and modification, tool development, and process optimization.

    Lead times can vary depending on the complexity of the project and the materials used. Please contact us for a more specific timeline.

    Yes, we are equipped to handle both small and large production runs, thanks to our versatile injection molding machines ranging from 50 to 400 tons.

    Quality assurance is built into every aspect of our manufacturing process. We adhere to strict quality control measures, including visual inspection, lot creation, data collection, and accurate measurements of product dimensions.

    You can request a quote by contacting us through our website's contact form, or by calling or emailing us directly.

    To provide an accurate quote, we typically need details like part design, material specifications, production volume, and any secondary operations or special requirements.