Full-scale air emissions monitoring and casting quality demonstration of a hybrid hydrolyzed collagen-alkali silicate core binder

Joshua F. Allen, Fred S. Cannon, Cesar Nieto-Delgado, Robert C. Voigt, John T. Fox, Jim Lamonski, John D. Kirby

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


When comparing a novel collagen and alkali silicate core binder system to a conventional phenolic urethane binder system during full-scale trials, the phenolic urethane incurred a 33.3 % higher emissions rate than did the novel binder system. This was chronicled during several hours of stack tests in a full-scale trial demonstration of 3500 novel cores at a high-volume automotive ductile iron foundry. Baseline phenolic urethane emissions were determined immediately prior to running the collagen and alkali silicate cores, when making an identical casting. Approximately 10 % of the demonstration iron castings were inspected for defects, of which none (0 %) were scrapped on account of core-related defects. Also, the novel core's shakeout was complete. These favorable results were achieved with humidity-free storage of the cores over the 10 days that the cores were made. These novel demonstration cores required somewhat longer curing time in the core-making machine, than did conventional phenolic urethane cores; and this curing rate was influenced by air flow and pressure into the core box. Also, tensile specimen tests of the collagen and alkali silicate-adhered system were higher than that of the conventional phenolic urethane system. When exposed to high humidity levels (80-95 % relative humidity) for prolonged periods of time (10 days), the collagen and alkali silicate-adhered tensile specimens degraded in terms of tensile strength and scratch hardness. These losses mostly rebounded when the tensile specimens were re-dried.

Original languageEnglish (US)
Pages (from-to)172-189
Number of pages18
JournalInternational Journal of Metalcasting
Issue number2
StatePublished - Apr 2016

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry


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