About Us


SMI is one of the premiere plastic injection molders in the Western United States. SMI has been doing business in Clearfield, Utah since 1981 when it started out with 4 machines and a few dedicated employees.

We have been specializing in hard to mold products and working with virtually every type of plastic since 1981.

SMI also has an aptitude for working with elastomers, thick walled plastic parts (gas assist), insert molding, engineered plastics, and automation.

Being centrally located in the Western United States. SMI is the perfect choice for companies looking for a molder that can ship easily and inexpensively to any of the Western States. With years of experience in the field, SMI’s employees have run the gamut with various plastic products including, medical, sporting goods, home fashions, consumer grade products, commercial grade products, and many more.

Quality Assurance

We are dedicated to providing quality work and materials to our customers.

Senior Management directs an integrated quality system that has been established to comply with the standards of ISO 9001:2015. This system promotes a culture of quality assurance throughout company systems and procedures.

Quality assurance is a process that encompasses the whole operation, from start to finish.

Whatever quality control measures your company requires, SMI can provide.

Quality Assurance Department

Our Quality Assurance department is equipped with the following:

  • Falcon 3-Axis Video Measuring Microscope
  • Optical Comparator
  • SPC software for CPK data collection


SMI has become an ISO 9001:2015 company and has expanded to a 60,000 square foot facility with machines ranging from 55 to 610 tons.

What We Do

SMI is one of the premiere plastic injection molders in the Western United States. We have been doing business in Clearfield, Utah since 1981 when we started out with 4 machines and a few dedicated employees. Today SMI has expanded to a 60,000 sq. ft. facility with 30+ machines ranging from 55 to 610 tons.

Plastic Injection Molding

SMI is best known for our achievements in top quality molding of difficult materials. Our veteran team's knowledge and experience helps us stay at the forefront.


As a Full Service Custom Injection Molder, we are a complete in-house tool fabrication and maintenance facility capable of rapid response repairs.

Plastic Engineering

Staffed with experienced engineers and support staff, SMI Molding is able to take on all types of Plastic Engineering jobs, regardless of complexity.


Insert-Molding allows certain structural or aesthetic aspects of a plastic part to be inserted into the mold and the plastic will mold around the inserted part.

Gas-Assist Molding

Gas assist molding for thick walled parts greatly reduces sinks and molded-in stress. With lower molding pressures, it is also more economical for large parts.

Secondary Operations

As a Single Source Supplier, SMI is able to provide added value operations like Hot Stamping of molded products, Turn-Key Assembly, as well as Packaging.

Management Objectives

SMI is committed to the continual improvement of quality systems in order to impact customer satisfaction by leveraging decades of manufacturing and engineering experience, thereby creating repeatable products that perform to specifications.

  • Customer focus
  • New technologies, techniques and processes
  • IQMS integrated software systems
  • Safe work environment
  • Work force engagement
  • On time delivery
  • Project management
  • Profitability to provide stability to customers

Have a Question?

Let's Start Something New

Get In Touch


Rosti PCI - Clearfield, UT
(SMI Molding, Inc.)

Freeport Center, Bldg. Z-13
Clearfield, UT 84016


(801) 776-4233


(801) 825-0982