About Us

Plastic Injection Molding Services

Since 1995, Stack Plastics, Inc., has been providing superior custom plastic injection molding and sonic welding services for the Bay Area and beyond. We started from scratch, with only two employees, a few molding machines, and no customers. With a lot of hard work, R&D, and determination, Stack Plastics has grown into a large, successful company with over 30 employees and outstanding production capabilities.

Stack Plastics specializes in medical, aerospace, and consumer products, and has the skills and equipment to provide everything from aftermarket motorcycle parts to audio equipment and much, much more. Stack Plastics works with established industry leaders and start-up companies alike to create custom plastic injection moldings for best-selling products, new devices, and everything in between.

Contact us today for more information about our custom plastic injection molding, sonic welding, and other services..

Contact us today!
Not sure what plastic you need for your next project? Contact us today!
Get a Molding Quote