Apparatus and methods for injecting and gassing of sand
AssigneeGeorg Fischer Disa, Inc.
InventorsPheroze J. Nagarwalla, Raymond F. Witte, Scott S. Hendrie
Life of this patent
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Abstract
The injection tube for injecting and gassing of foundry sand in cavities in a core box has a first passage for passing sand and a second passage for passing hardening fluid. Sand may be injected simultaneously to the introduction of hardening fluid into the cavities. Alternatively, sand may be injected prior to introduction of hardening fluid into the cavities.
Claims27
Apparatus for injecting foundry sand into a core box, comprising:
- an injection tube having first and second ends and a side wall disposed between the first and second ends;
- a sand injection passage disposed in the injection tube;
- and
- a hardening fluid passage also disposed in the injection tube;
- wherein at least one of the sand injection passage and the hardening fluid passage includes an outlet in the side wall, and the sand injection passage is not in fluid communication with the hardening fluid passage.
Apparatus for injecting foundry sand into a core box having a cope, a drag, and a cavity therebetween, comprising:
- an injection tube having a side wall, a first passage for passing foundry sand into the cavity, and a second passage for passing hardening fluid into the cavity;
- the first passage having a first outlet in the side wall and a first lateral portion extending to the first outlet;
- and
- the second passage having a second outlet in the side wall and a second lateral portion extending to the second outlet;
- the first passage not being in fluid communication with the second passage.
Apparatus for injecting foundry sand into a core box having a cope, a drag, and a cavity therebetween, comprising:
- an injection tube having a bottom, a first passage for passing foundry sand into the cavity, and a second passage for passing hardening fluid into the cavity;
- the first passage having a first inlet and a first outlet;
- and
- the second passage having a second inlet and a second outlet;
- the first and second outlets being located at different distances from the bottom of the injection tube,
- the first passage not being in fluid communication with the second passage.
A method of producing hardened sand cores in a cavity of a core box, the method comprising the steps of:
- providing a tube having first and second passages including first and second outlets, respectively, located in a side wall of the tube;
- injecting sand through the first passage into the cavity to produce cores;
- and
- introducing hardening fluid through the second passage into the cavity to harden the cores.
A method of producing hardened sand cores in a cavity of a core box, the method comprising the steps of:
- providing a tube having a first passage including a first outlet and a second passage having a second outlet;
- injecting sand through the first passage into the cavity to produce cores;
- adjusting the position of the tube relative to the core box to place the second outlet in fluid communication with the cavity;
- and
- introducing hardening fluid through the second passage into the cavity to harden the cores.
Dependencies are inferred from the claim text.