Conveyors: power-driven – With means to facilitate working – treating – or inspecting... – Means to transfer a load back and forth between the mainline...
Patent
1983-09-16
1986-06-17
Hoag, Willard E.
Conveyors: power-driven
With means to facilitate working, treating, or inspecting...
Means to transfer a load back and forth between the mainline...
164 44, 164325, 249104, 425182, B65G 4700, B29C 3334
Patent
active
045950903
DESCRIPTION:
BRIEF SUMMARY
FIELD OF INVENTION
The present invention relates to a device for changing model plates in molding machines, in which each model plate is conveyed from a lifting site on a pivoting plate or turnstile to a model plate carriage.
BACKGROUND OF THE INVENTION
A number of devices are known for changing model plates in which the model plates are moved by a transverse movement of a storage site element into the molding machine. Other arrangements involve a pivoting plate or turnstile, wherein a model carrier is removed from a magazine and is exchanged with a model carrier found in the molding machine during an interruption of the cycle of the molding machine.
Other arrangements are known wherein a mechanism is inserted between the pivoting plate and the model plate storage site. Model plates are picked up by the mechanism from the pivoting plate and are moved into the storage site. For example, DE-OS No. 30 22 651 discloses a system with a lifting cylinder mounted on a frame. On the piston rod of the lift cylinder a lifting frame is arranged and has vertical step cylinders. Four openings are in a model plate carrier, preferably in one orthogonal grid per model plate element. The number of and the grid dimensions of the step cylinders are synchronized with the arrangement of the openings.
A disadvantage of this arrangement is that a plurality of devices must be used in coordination for any one model plate exchange, which coordination is very costly. Also, the arrangement can become polluted such that precise positioning of the model plates is no longer guaranteed.
SUMMARY OF THE INVENTION
Objects of the present invention are to eliminate the disadvantages of conventional systems and to provide a system wherein prepared model plates can be changed without interruption of the cycle of the molding machine and wherein the model plates can be positioned outside the molding machine.
The foregoing objects are basically obtained by an apparatus for changing model plates in a molding machine. The apparatus comprises a feed mechanism with carriages for conveying plates in a horizontal direction on the carriages, a rotatable conveyor for horizontally moving model plates between lifting and molding sites along a pivot field circle, and a lifting mechanism at the lifting site. The lifting mechanism moves the model plates between the lifting site on the rotatable conveyor and one of the feed mechanism carriages along a vertical axis intersecting the pivot field circle and the longitudinal axis of the carriages.
Other objects, advantages and salient features of the present invention will become apparent from the following detailed description, which, taken in conjunction with the annexed drawings, discloses a preferred embodiment of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
Referring to the drawing which forms a part of this disclosure and which is a perspective view schematically illustrating an apparatus for changing model plates in a molding machine according to the present invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENT
The drawing diagrammatically illustrates a pivoting plate 1. Position 2 is the position of the model plate in the molding machine. Position 3 shows the model plate outside the molding machine, and coincides with the position of a lifting site. The lifting site mechanism has a lifting table which can be moved vertically by means of a cylinder arrangement.
The movement can be controlled pneumatically, hydraulically, or electromechanically. Driven rollers can be arranged on top of the lifting table. The dimensions of the driven rollers are adapted to the model plates. The lifting site has a bottom position in which its vertical axis intersects the pivot field circle 4 of pivoting plate 1. The top position of the lifting site is in the area of a model plate feed device 6. The feed device axis 5 runs horizontally through the vertical axis of the lifting device site.
The feed device essentially consists of at least two model plate carriages 6a provided with driven rollers. These dr
REFERENCES:
patent: 3802487 (1974-04-01), Feller
patent: 4111624 (1978-09-01), Hanson
Georg Fischer AG
Hoag Willard E.
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