Granite State Plastics

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Londonderry, NH  |  603-595-7790

Granite State Plastics, located in Londonderry, NH, is a trusted provider of Injection Molded Plastics products and services. With a commitment to quality, reliability, and customer satisfaction, we specialize in delivering customized plastic solutions to a diverse range of industries.


Granite State Plastics offers a comprehensive range of Injection Molded Plastics products that are designed to meet the unique needs of our clients. Our product offerings include:

1. Custom Injection Molded Parts: We excel in producing custom plastic parts that are tailored to our clients' specifications. Whether it's small, intricate components or larger, more complex parts, our advanced injection molding capabilities allow us to manufacture high-quality, precise, and durable products. We work closely with our clients to understand their specific requirements and deliver solutions that meet their exacting standards.

2. Prototyping and Product Development: We understand the importance of bringing new ideas to life quickly and efficiently. Our prototyping and product development services enable clients to validate their concepts and iterate designs before proceeding to full-scale production. With our expertise in rapid prototyping, we help our clients reduce time-to-market and optimize their product designs for manufacturing.

3. Secondary Operations and Value-Added Services: In addition to injection molding, Granite State Plastics offers a range of secondary operations and value-added services. These include assembly, decorating, finishing, packaging, and more. Our capabilities extend beyond injection molding, allowing us to provide comprehensive solutions that meet our clients' specific needs.

Service Capabilities:

Granite State Plastics is dedicated to providing exceptional service and support throughout the manufacturing process. Our service capabilities include:

1. Design Assistance and Engineering Support: Our experienced team of designers and engineers collaborates closely with clients to optimize their product designs for injection molding. We offer design assistance, feasibility analysis, and value engineering to ensure manufacturability and cost-effectiveness. By leveraging the latest design software and tools, we help our clients create innovative and functional products.

2. Tooling and Mold Design: With our in-house tooling capabilities, we provide reliable and efficient mold design and manufacturing services. Our skilled toolmakers leverage advanced technologies and processes to create high-quality molds that meet the exact specifications of our clients. We employ mold flow analysis and optimization techniques to ensure optimal performance and quality in the injection molding process.

3. Advanced Injection Molding Techniques: At Granite State Plastics, we utilize state-of-the-art injection molding equipment and techniques to deliver consistent and precise results. Our experienced technicians and operators closely monitor the injection molding process to ensure superior part quality, dimensional accuracy, and repeatability. We adhere to strict quality control standards to meet or exceed customer expectations.

4. Quality Assurance: Quality is at the core of our operations. We have robust quality control measures in place to ensure that our Injection Molded Plastics products meet the highest standards of quality and reliability. Our quality assurance team conducts rigorous inspections and tests at every stage of the manufacturing process to ensure compliance with customer specifications and industry regulations.

Industries Served:

Granite State Plastics caters to a diverse range of industries, including automotive, electronics, medical devices, consumer goods, and more. Our Injection Molded Plastics products find applications in various market segments, and we have the expertise to meet the specific requirements and regulatory standards of each industry. Our goal is to provide innovative solutions that help our clients succeed in their respective markets.

At Granite State Plastics, we are committed to delivering exceptional Injection Molded Plastics products and services that exceed customer expectations. Through our dedication to quality, technical expertise, and customer collaboration, we aim to be the trusted partner for all your plastic manufacturing needs.

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