Since 1981, Kore Mart has supplied foundries with custom cores, resin-coated sand and related production services. Based in Hamburg, Pennsylvania, the company also operates what it describes as the country’s only sand-recycling service, processing used foundry sand for reuse. Kore Mart has added 3D-printed sand cores and molds with an ExOne S-Max printer while continuing to support foundries with in-house technical expertise and logistics.
Founders Sand CoresWith more than 30 years of core-making experience, Founders Sand Cores produces sand cores for foundries, from established production work to complex new designs. The Deerfield, Ohio shop is notable for pairing traditional cold- and hot-box work with 3D-printed sand cores, a capability it began developing in 2024. Founders also researches 3D-printed foundry tooling and sand reclamation as it helps customers move prototypes and difficult castings toward production.DEERFIELD, OH
J-Lenco, IncBuilt from a dirt-floor garage in Marion, Ohio, J-Lenco has produced sand cores for ferrous and non-ferrous foundries since 1968. The family-owned and operated company now makes cold-box cores for prototype through high-volume work, including a former run of roughly 20,000 rotor cores per day for Kelsey-Hayes. J-Lenco also produces ASTM-standard test cores and maintains traceable quality controls on each mix.LARUE, OH
Harrison Machine CoHarrison Machine Co. manufactures foundry equipment, including core machines for shell, cold-box, hot-box, and warm-box processes, mold machines, and sand transport systems. The company also offers automated core unloading, machine rebuild and refurbishment, installation and training, technical assistance, and replacement parts.ERIE, PA
ExOne GmbHExOne GmbH develops and manufactures industrial binder-jetting 3D printing systems and also produces parts through its on-demand printing services. Its industrial sand-printing work grew from binder-jetting research at the Technical University of Munich in the mid-1990s; the company reports more than 500 systems installed worldwide. ExOne serves production operations in foundries and manufacturing plants, including aerospace, automotive and energy applications.NORTH HUNTINGDON, PA