We are a custom precision plastic injection molder - and so much more.
Celebrate with Us
In 2024, we are celebrating our 50th anniversary – a huge milestone we couldn’t achieve without our employees, customers and suppliers. We are grateful to everyone who has supported us and taken part in taking us from a cast-to-size tooling foundry and machine shop to a custom, precision plastic injection molder – and so much more.
At Four Process, it’s more than just making engineered plastic parts. We take a strategic approach to your plastic injection molding business – data, trends, solutions – to address and meet your changing needs throughout a product’s lifecycle.
Our team is with you from start to finish – concept, prototype, production and all the changes along the way.
Flexibility to manage short-, medium- and long-runs
Precision injection molding capabilities delivering quality products on time
Custom inventory management enables the ability to quickly fulfill customer orders
On-site production capabilities delivering a one-stop shop for assembly, component sourcing, fabrication, specialized packaging and more
Establish long-term partnerships with customers
Not every customer fits the same “mold.”
Everything we do at Four Process, from our products to our people, is driven by a culture of honesty, value and reliability to create and nurture open, long-term relationships with our team and customers.
We treat you as an individual giving you custom molded products and custom service.
Companies come and go.
But for more than 45 years, Four Process, a woman-owned, third-generation family, small business in St. Louis, Missouri has successfully evolved in sync with changes in the industry and our customers’ demands. Today, this stability, along with our cross-trained team and range of services, gives us the ability to take on both transfer work and jobs that need to be reshored to eliminate supply chain risk.
