SPI Industries
Injection Molding (574) 272-3733
Blow Molding (269) 849-3200

custom • design support • engineering • molding


SPI Blow Molding ExpansionSouth West Michigan

SPI Blow MoldingRibbon cutting July 13, 2015. John Doster, President of SPI and Izzy Dimaggio, Hagar Township Supervisor handling the honors.

Coloma, MI, SPI Blow Molding recently celebrated the completion of their 6,000 square foot warehouse addition with a formal ribbon cutting July 13, 2015.  John Doster, President of SPI and Izzy Dimaggio, Hagar Township Supervisor handled the honors.

The entire Hagar Township Board as well as some interested members of the community attended the ceremony which was followed by a tour of the plant and an explanation of what SPI Blow Molding does and in general how they do it.  Thad Rieder of Cornerstone Alliance was also in attendance. Rieder was instrumental in assisting SPI with the tax abatement process, which was unanimously approved by the Hagar Township Board.

Doster commented on how pleased the company was with the support they have received from not only the Hagar Township Board, but the State of Michigan as a whole. “The support we have been given by the State of Michigan is more than expected.  It all started with Cornerstone Alliance putting us in touch with the various other agencies which could help us stabilize and grow.” Doster said.  “Michigan Small Business Development Corporation (MSBDC) helped us get the ball rolling. Cornerstone Alliance pushed us along and the Hagar Township Board capped it off with tax abatement support.”

It takes a village and in this case it looks like the village won.  It is nice to see the various governmental sponsored entities come to the aid of private enterprise and make things happen.  Though this is on a very small scale it represents what a larger team can do.  SPI indicated they have added 5 new jobs since the approval of this new project.

SPI Blow Molding is a Custom Blow Molder of hollow plastic parts.  They are an extrusion blow molder specializing in low to medium volume work, requiring a fairly large array of materials.  Their customer list includes major manufacturers such as GE Healthcare, making arms for MRI Beds, down to the small single product entrepreneur such as Best Bins, making bulk food dispensers.  They process basic polypropylenes and ethylene’s to more difficult clear polycarbonates.  SPI has molding size capacity from a single pound head through 40 lb head machines.  SPI is capable of assisting customers with product design, tool design, tool building and the ultimate production of finished goods.  They are located at 3930 Bessemer Rd., Coloma, Michigan, 49038.  They can be contacted at 269-849-3200 or here on the website.


SPI’s mission is to provide the best custom molding experience for the injection and blow molded requirements of its valued customers. This experience involves flawless support culminating in successful global product delivery. SPI’s core software, mechanical, and human technologies insure future profitability and growth to its employees, community and customers. SPI’s commitment is embodied in its value statement and quality policy.


Media Contact for SPI Blow Molding
John Doster
3930 Bessemer Rd Coloma, MI 49038