DE1069337B - - Google Patents

Description

A core shooter has under normal conditions and operation by a former in the Companies mostly very lukewarm idle times because of the shaper has to do a number of ancillary work after filling the core box, namely knocking loose, Insert pins. Unpacking, repolishing, putting on the core shell. Turning the can over, cleaning and dusting, as well as the assembly of the same. During this idle time the machine is unemployed.

The idle times mentioned can at least be reduced quite considerably if the machine can alternately fill core boxes of different sizes by the jig in known per se Way is adjusted to larger and smaller core boxes. In the known clamping devices this setting must be made by shifting the pivot axis of a pressure lever or by opening Clamping devices for the jaw holder are made by moving the same, whereupon the clamping devices must be retightened.

This work takes a relatively long time, and it is the object of the invention that immediately without readjustment of the clamping jaws one after the other two core boxes of different sizes can be clamped and filled on a machine. As a result, instead of two machines, one can often get by with one on which two formers work, and which is accordingly better exploited.

This is Errinduiigsgemäß mainly achieved in that duplicate even mutually displaceable clamping jaws barks use with separate drive means, the rear jaws can be actuated by the main clamping piston while the front of the core box adjacent clamping jaws also of their associated clamping piston to move.

For example, implementation of the invention shows the drawing, namely is

Fig. 1 is a horizontal section through the left vise of a core shooter according to the invention,

Fig. 2 is a partially sectioned front view of the entire clamping device of the core shooter with the left and right vice in a smaller size tem standards.

FIG. 3 is a view corresponding to FIG. 2 during tensioning a large core box,

FIG. 4 is a view corresponding to FIG. 2 during tensioning a small kerii can,

Fig. 5 is a horizontal section through the right and

Fig. 6 is a similar through the left vise in another embodiment, which instead of as in Core shooter

with pressure medium actuated

Core sleeve clamping device

for alternately used core boxes

different size

Applicant:

Machine and tool factory cable

Vogel & Schemmann A.-G.,

Hagen (Westf.) - Cable

Peter Schemmann, Iserlohn,
has been named as the inventor

the previous version is to be operated with compressed air and with oil pressure.

In the embodiment according to FIGS. 1 to 4, the two saving sticks have two-part clamping jaws, from which the front jaw 5 and the rear jaw 6 are provided with separate drive means. As a result the front clamping jaw 5 is fastened to rods 9 which can be displaced by means of two clamping pistons 7. Of the rear clamping jaws 6, however, are arranged on tubes 4 which encompass the rods 9 and with the cylinders 3 of the tensioning piston 7 are in connection. A connecting piece of the two cylinders 3 contains one Nut 17, into which a spindle 2 is screwed, which by means of a handwheel < 1 can be rotated. The spindle goes through with a stepped part 17a a central bore of a main clamping piston 10 therethrough, behind which the spindle end z. B. a secured Mother 17?). As a result, by rotating the spindle 2, the axial distance between the Main clamping piston 10 and the cylinders 3 can be reduced or enlarged depending on the direction of rotation. Of the The cylinder 18 of the main clamping piston 10 is firmly connected to the machine frame 19. Behind the main tension piston 10 there is a return spring 20 inside the cylinder 18.

The front clamping jaw 5 is provided with a stop bar 8 provided that carry adjustable stops 13 which can strike the rear clamping jaws 6.

Claims (5)

As already mentioned, it should be possible to work alternately with a large and a small core box on the machines. The machine is first set to the large Kembüehse 11 (Fig. 3), which is on the table 14. For this purpose, by turning the handwheels 1 of the left and right vice, the spindle 2 is adjusted until the front clamping jaws 5 are a few millimeters away from the core sleeve 11, so that the core sleeve can still be comfortably inserted between the front clamping jaws 5 can. Compressed air is now applied to the main clamping piston 10, so that it moves to the right in Fig. 1 under tension of the return spring 20 and via the spindle 2, the cylinder 3 and the tubes 4, the rear clamping jaw 6 takes along, which in turn drives the front clamping jaw 5 presses against the core sleeve. After the rifle 11 has fully fired, the compressed air acting behind the piston 10 is released, causing the jaws to loosen again by a few millimeters. The core box 11 can now be pulled out and emptied and cleaned on a special table. In the meantime, a small rifle or a plurality of small rifles 12 are to be shot full. The small sleeve 12 is in turn placed in the center of the table 14 (Fig. 4), while the stops 13 are set on the stop legs 8 so that they come to a stop when the clamping jaw parts 5 move against the rear clamping jaw parts 6 and the front clamping jaw parts 5 to a standstill as soon as the latter are still a few millimeters in front of the small core box 12. The front clamping jaws S are advanced in that the clamping pistons 7 are subjected to compressed air so that they move the clamping jaws 5 in the direction of the small core sleeve 12 via the rods 9. If the stops 13 have come into contact with the rear clamping jaws 6, the last contact pressure before the core sleeve is filled is supplied by the main clamping piston 10, which is pressurized with compressed air for this purpose. The loosening and renewed tensioning of a row of small sleeves 12 to be filled one behind the other is carried out by the main tensioning piston 10, so that the tensioning piston 7 does not have to move back and forth with its longer stroke each time, which saves compressed air. If a change is now to be made from the small core sleeve to the large core sleeve, it is of course necessary to pull the clamping jaws 5 back into their starting position by means of the clamping piston 7. Then proceed as described above when tensioning the large core sleeve 11. Since the stops 13 remain in their setting, it is possible to switch from operation with a small core box to one with a large core box and vice versa in the shortest possible time without any new adjustment work. The compressed air control of the entire shooting and cocking process can be done by a four-way valve. By appropriately different setting of the stops 13 of the two clamping jaws, one can also ensure that small core boxes are clamped off-center with respect to table 14 when the shooting hole of the core box is off-center. The exhaust of the feed cylinder 3 and / or of the clamping cylinder 18 expediently opens out in the direction of the table top 14. so that the Ausptiffhtft can be used to free the tabletop of core sand. 5 and 6 show an embodiment of the real and the left vice for operation with pressure oil. The front clamping jaw 5 'is connected here via rods 9' to clamping pistons T, which are mounted displaceably in cylinders 4 '. The rear clamping jaws 'are above the cylinder 4' with the locker! nut 17 'in connection, in which the' by the handwheel 1 'to be operated spindle 2' is screwed. In the case of FIG. 3, the spindle end is rotatably anchored in a stationary bridge 21. The stops 13 'and the stop bars 8' correspond to the stops 13 and the limit bars 8 according to FIG. will. In the case of FIG. 6, the end of the spindle 2 'is rotatably anchored in a main tensioning piston 10' with return spring 20 'as in the embodiment of FIG the nut 17 'with the cylinders 4' connected to it can be changed. The mode of operation of this embodiment is essentially the same as that of FIG. 1. When using a large core sleeve, after rough adjustment of the vices by means of the spindles 2 ', only the main clamping piston 10' is subjected to pressure oil, whereupon the large core sleeve is tensioned. When using a small core sleeve> e, pressurized oil is fed into the cylinder 4 ', whereby the clamping piston 7' with the front clamping jaw 5 'is pushed forward until the stops 3' come into contact with the counter-stop. Then the main clamping piston 10 'is pressurized with oil, whereby the spaces of the cylinders 4' must be closed so that the clamping pressure of the main clamping piston 10 'is transmitted via the cylinders 4', the oil contained therein and the pistons 7 'to the front clamping jaws 5' will. Patent claims: 1. Core shooter with pressure medium operated core box clamping device for alternating used core boxes of different sizes, characterized by double, also against each other movable clamping jaws with separate drive means, the rear clamping jaws (6) are to be actuated by the main clamping piston (10 *). while the front ones rest against the core box The clamping jaws (51 also have to be moved by the clamping piston (7) assigned to them). 2. Core shooter according to claim t. characterized in that the front clamping jaws (5) is attached to rods (9) which can be displaced by means of clamping rams (71). 3. Core shooter according to claim 1 and 2, characterized in that the rear clamping jaws (6) is arranged on the piston rods (9) comprehensive tubes (4). the one with the cylinders (3) the clamping piston (7) are connected. 4. Core shooting machine according to claim 1. 2 and 3, characterized in that the cylinders (3) of the tensioning piston (7) are connected to a main tensioning piston (10) and can be displaced therewith. 5. Core shooting machine according to claim 4, characterized in that the connection of the two cylinders (3) of the tensioning piston (7) contains the nut (17) for a feed spindle (21).