Plastic Injection Molding in Los Angeles

Quick prototype engineering and scaled production manufacturing:
Front of JB Custom Mold Mfg. Building

JB Custom Mold Mfg. has served manufacturing businesses in the greater Los Angeles area for more than 25 years. We provide cutting-edge mold design / mold fabrication and thermal plastic injection molding complete manufacturing solutions.

•We excel at quick response design, tooling, project setup and timely scaled manufacturing production.

•We turn ideas into commercial-grade products and parts and we make the experience painless and easy for our clients.

CAD / CFD Mold Fabrication Machine with Stylized Design


Optimal mold design and precision mold manufacturing is the most important component of the plastic injection molding process. Our mold design procedure overlaps with our clients' product design most of the time. Having a strong knowledge of plastic component design is critical to the longterm success of the manufacturing process and finished product.


JB Custom Mold Mfg. accommodates projects of all sizes with the same urgency and commitment to quality. Our clients are assured every run of plastic parts manufactured to very strict tolerance standards. We enjoy a high client retention rate and we do tend to be selective to companies serious about their success and their own quality control.


Access to our plant is quick and easy from all directions in the greater Los Angeles area, including coming from the Palmdale / Lancaster area. We are a few blocks from Interstate 5 at the third exit south of the 405 split. Coming from San Gabriel Valley the 210 provides the most direct route and driving from Orange County is simply straight north on Interstate 5.

Call and speak directly with an injection molding and mold design engineer to start the exciting process of forging your vision into reality and finished products. For Made in USA entrepreneurs and manufacturers serious about the quality and integrity of their products JB Custom Mold Mfg. is the most approachable and easy to work with plastics manufacturer you will find.