Fast curing furan foundry binder system containing a metal salt accelerator
AssigneeQO Chemicals, Inc.
InventorsRobert Krawiec, James E. Menting
Life of this patent
Estimating the term…
Abstract
Quick curing "no bake" foundry core and mold compositions containing metal salt accelerators to provide shaped sand shapes which can be removed from a mold in a period of not more than about 40 seconds.
Claims13
A foundry composition for forming sand cores or sand molds which at ambient temperature can be stripped from a mold cavity within a period of not more than about 40 seconds after placing the composition in said mold cavity which comprises sand, a sulfonic acid catalyst, a furan-based binder and an accelerator selected from the group of zinc chloride and copper chloride.
A foundry composition for forming sand cores or sand molds which at ambient temperature can be stripped from a mold cavity in less than about 40 seconds which comprises:
- (a) a first admixture of sand and a sulfonic acid catalyst;
- and
- (b) a second admixture of sand, a furan-based binder and an accelerator selected from zinc chloride and copper chloride.
A process for forming a foundry sand core or sand mold which comprises:
- (a) preparing a first mixture of sand and a sulfonic acid catalyst;
- (b) preparing a second mixture of sand, a furan-based binder and an accelerator selected from zinc chloride and copper chloride;
- (c) mixing together said first and second sand mixtures and rapidly introducing at ambient temperature the resulting admixture into a mold;
- and
- (d) removing at ambient temperature a shaped sand mass from the mold within a period of not more than about 40 seconds from the time the admixture was introduced into said mold.
Dependencies are inferred from the claim text.