US3576246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry mold conveyor system
Assignee: Vulcan Engineering Co Inc
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Filing: 1969-03-05
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Granted: 1971-04-27
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Expires: 1989-03-05
Abstract
Abstract A conveyor system for the intermittent movement of foundry sand molds on pallets from a molding station through the metal pouring and solidifying stations, through jacket and weight transfer stations, to a shake-out station, and with return of pallets to the molding machine, is disclosed, including means for transferring the molds on pallets through right-angled turns to adjacent parallel paths of a conveyor means. The jackets and weights are transferred, under separate manual operation, from closely adjacent parallel portions of the conveyor path. The step-by-step movement of the pallets follows a repeated sequence in which all pallets on long conveyor sections are moved simultaneously forward one pallet length followed by simultaneous movement of all pallets one pallet length on all cross conveyor sections which connect the long conveyor sections. The timing may be automatic or manually controlled.
Inventors
- 👤 Frank A Hulet
- 👤 Wilmer J Friesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:17
CPC Classifications
B; B22; B22D; B22D33/00; B22D33/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
233 words
A foundry sand mold conveyor system for the intermittent synchronous movement of load supporting pallets, said system comprising: a. a succession of long parallel conveyor sections with right angle cross conveyors at the end of each section, making an outer rectangular path and at least one reentrant inner rectangular open loop portion, all forming a complete circuit; b. transfer station means disposed at the end of each conveyor section of the circuit comprising two rams disposed at right angles to each other, the first ram being arranged to move the forward pallet from a first long conveyor section of each pair of sections on to an adjacent cross conveyor including all pallets positioned on said cross conveyor, and said second ram being arranged to move the forward pallet on said cross conveyor at right angle thereto on to an adjoining second of a pair of long conveyor section disposed parallel to said first long conveyor section, and also to move all pallets thereon for one pallet length in the opposite direction to the movement of said first long conveyor section, the forward pallet on said second long conveyor being moved into said next transfer station; c. control means for actuating the ram means at each transfer station at selected time intervals; said conveyor system being arranged to move a succession of pallets around the circuit step-by-step through a plurality of mold manipulatory stations.
Claim 2
Dependent Claim
233 words
A foundry sand mold conveyor system for the intermittent synchronous movement of load supporting pallets, said system comprising: a. a succession of long parallel conveyor sections with right angle cross conveyors at the end of each section, making an outer rectangular path and at least one reentrant inner rectangular open loop portion, all forming a complete circuit; b. transfer station means disposed at the end of each conveyor section of the circuit comprising two rams disposed at right angles to each other, the first ram being arranged to move the forward pallet from a first long conveyor section of each pair of sections on to an adjacent cross conveyor including all pallets positioned on said cross conveyor, and said second ram being arranged to move the forward pallet on said cross conveyor at right angle thereto on to an adjoining second of a pair of long conveyor section disposed parallel to said first long conveyor section, and also to move all pallets thereon for one pallet length in the opposite direction to the movement of said first long conveyor section, the forward pallet on said second long conveyor being moved into said next transfer station; c. control means for actuating the ram means at each transfer station at selected time intervals; said conveyor system being arranged to move a succession of pallets around the circuit step-by-step through a plurality of mold manipulatory stations.
Claim 3
Dependent Claim
47 words
The foundry sand mold conveyor system defined in claim 1, in which the manipulatory stations comprise a mold forming station, a metal pouring station, cooling sections, a shake out station, and pallet return means to deliver the empty pallets to a position adjacent said mold forming station.
Claim 4
Dependent Claim
42 words
The foundry sand mold conveyor system defined in claim 1, in which the manipulatory stations comprise a mold forming station, a mold jacketing station, a metal pouring station, a jacket removal station, a casting shake out station, and a pallet return means.
Claim 5
Dependent Claim
58 words
The foundry sand mold conveyor system defined in claim 1, in which the ram means comprises for each station a fluid cylinder and piston means which operatively engages the rearward edge of the last pallet on a section which is to be moved, whereby to move all the abutting pallets in said section forwardly by one pallet length.
Claim 6
Dependent Claim
51 words
The foundry sand mold conveyor defined in claim 1 in which said control means simultaneously actuates all ram means directed parallel to the conveyor sections alternately with actuation of all ram means directed at right angles thereto, for step-by-step synchronous movement of the pallets in each case by one pallet length.
Claim 7
Dependent Claim
222 words
A 180 degree transfer station for a foundry mold conveyor system in which load bearing pallets are moved on a succession of parallel long conveyor sections connected by cross conveyor sections at right angles thereto and wherein said pallets are turned in direction by 180 degrees comprising: a supporting frame including corner flat bed plates at the elevation of said conveyor section, disposed adjacent ram means for moving the pallets; a pair of rams disposed at right angles to each other, the first ram having a puller means operatively engaging the rearward edge of a pallet resting on a first flat bed plate, and adapted to move said pallet forwardly by one pallet length on to an adjoining cross conveyor, including also all pallets positioned ahead of it on said cross conveyor, the forward pallet being then disposed on a flat plate, and said second ram operatively connected to pusher means being arranged to move the forward pallet resting on a second flat bed plate at the end of said cross conveyor at right angles thereto, on to an adjoining long conveyor section for one pallet length, and to also move all pallets on said long conveyor for one pallet length, the forward pallet on said long conveyor section being thereby moved on to the flat plate of the next transfer station.
Claim 8
Dependent Claim
222 words
A 180 degree transfer station for a foundry mold conveyor system in which load bearing pallets are moved on a succession of parallel long conveyor sections connected by cross conveyor sections at right angles thereto and wherein said pallets are turned in direction by 180 degrees comprising: a supporting frame including corner flat bed plates at the elevation of said conveyor section, disposed adjacent ram means for moving the pallets; a pair of rams disposed at right angles to each other, the first ram having a puller means operatively engaging the rearward edge of a pallet resting on a first flat bed plate, and adapted to move said pallet forwardly by one pallet length on to an adjoining cross conveyor, including also all pallets positioned ahead of it on said cross conveyor, the forward pallet being then disposed on a flat plate, and said second ram operatively connected to pusher means being arranged to move the forward pallet resting on a second flat bed plate at the end of said cross conveyor at right angles thereto, on to an adjoining long conveyor section for one pallet length, and to also move all pallets on said long conveyor for one pallet length, the forward pallet on said long conveyor section being thereby moved on to the flat plate of the next transfer station.
Claim 9
Dependent Claim
58 words
The transfer station defined in claim 6 in which the said second flat bed plate is provided with a large opening therethrough, and said second ram pushes said pallet across said opening and through a slot in a partition wall on to said long conveyor section, thus dropping off the mold and contents into a shake out pit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |