FIELD OF INVENTION
The present invention relates to an electro-pneumatically operable core stacking machine.
RELATED ART
Laminations are thin metal plates which are assembled in superposed relation in an electrical coil to increase the inductance, if it is a choke, or to increase the mutual inductance if it is a transformer. Normally, the coil is wound with an open center and the core surrounds two legs of the coil, extending through the center of the cold By far the
most common practice in interleaving laminations is to insert an E-shaped lamination (having a center leg of approximately twice the width of either leg or back) into the coil with its center leg extending through the center thereof. An I-shlped plate abuts the distal ends of the legs of the E-plate to close the magnetic path about the sides of the coil. Interleaving refers to inserting alternate E-plates from different directions and is distinguished from butt stacking wherein the E-plates are all vertically aligned.
There has been a desire on the part of presons using lamination stacking machines for building transformers and the, like, to have a machine which will accommodate laminations of different size,as are used in making transformers of different sizes and power capacity. Machines are commercially available to stack laminations in one-eighth inch increments other a range of one-quarter inch through 21/2 inches. The size of a lamination is, deterntined by the width of the center leg of the E-plate which is approximately the with of the opening in the coil. All other dimensions of the laminations are, according to industry standards, sized or proportioned relative to this basic dimension.
There have been attempts to provide lamination stacking machines which are adjustable to accommodate different size laminations, but none have met with commercial success. One attempt at an adjustable machine employs a pair of chains which are arranged in conveyor fashion on opposite sides of a center location wherein the chains are equipped with lugs or pickers for picking laminations from the bottoms of magazines located on

either side of the coil station and inserting them directly into the coil, interleaving the E-plates.
Of all proposed lamination stacking machines, following two types of technologies are present:
1- Movement of lever by manual operation: In these types, of machines, the rotary
i-
movement of shaft contributes to linear displacement of lever whith will push & pull the lamination core at required position.
2- Movement of lever by electric drive: In these types of machines, the rotary movement
of shaft contributes to the linear displacement of lever which will push & pull the
lamination core at required position. ,
Thus conventional core filling machine is a cam operated electro-mechanical device having motor which rotetes the.cam with a rod attached with the cam & a plate that pushes the core in bobbin. This machine is motorized and totally electrical. It is required to put strokes as perrequinment for a single transformer.
US patent no 3798735 and publication no GB1399685 discloses a lamination stacking macline which is adapted to receive interchangeable heads so that the machine will accommodate number of different size lamination plates using the same base and drive mechanism simply by lifting one head off and replacing it with a head of the desired size. This is a manual machine with interchangeable heads to assemble different sizes of lamination. The machine has a cam engaged with the slide and the cam is driven by a wheel, when we rotate the wheel, cam gives the linear movement to the slide which take the lamination & push in the bobbin.
US patent no 3955264 describes a core steel stacking machine for stacking cut core lamination members with a uniform stagger or offset. The cut core laminations are

transferred one at a time from a pack of cut laminations and placed on a transfer table which is indexed after each lamination to provide a uniform stagger or offset between the ends of adjacent core laminations. This is a pick & place unit which works just after cutting of lamination from sheet.
Publication no JP58148417, enables automatically stacking of steel plates connected directly to the production line by a method wherein laminated steel plate correcting devices being designed to make the guides and follows the action of cylinders. These devices are arranged meeting at right angles with the width direction of the steel plates.
Reference may be made to a product by "Will Power Technology Enterrise Co Ltd". It is an auto lamination stacking machine. There are E & I plate storages on both sides of the machine. On pressing the start button and the core plates will be automatically inserted into the coil or transformer up to the required specks, it will also automatically stop when any core plate is clipped during work. The machine comes with a sturdy bobbin clamp to hold the bobbin firmly in position. This clamp will automatically open when the insertion is finished. The lever is moved by electric drive. In these types of machines, the rotary movement of shaftegntributes to the linear displacement of lever which will push & pull the lamination core at reuired position.
Reference may be made to a product by "Tops-Mate Int'l Corp", "Maxocean Corporation" and "Nishimoto G H". It is a hand lamination stacking machine specially designed to insert EI laminations into coil bobbin and as to the product quality and cost performance. The lever is moved by manual operation by operator. In these types of machines, the rotary movement of shaft contributes to linear displacement of lever which will push & pull the lamination core at required position
With all the above discussed restrictions or limitations it is required to have improved core filling machine. The present core filling machine is an electro-pneumatic & Mechanical device. There is a programmable logic controller (PLC), signal to counter
and pneumatic cylinder. This is an electro-pneumatic core filing machine in which transformer bobbin can be filled with the core without damage and magnetic degradation by stacking layers having patterns of magnetic and insulating regions separated by regions that are removable during sintering. The pneumatic pressure is cojtitrolled and it can be stopped at any time wherein the alignment of the core is not that and huge quantity of material is saved.
OBJECTS OF THE INVENTION-

The primary object of the present invention is to provide In electro-pneumatically operable core stacking machine which is fully automatic.
Another object of the present invention is to provide an electro-pneumatically operable core stacking machine which can reduce cracking during the stacking of the cores.
Still another object of the present invention is to provide an electro-pneumatically operable core stacking machine which is faster and easier to use.
Another object of the present invention is to provide an electro-pneumatically operable
core stacking machine which is easy to maintain.
Yet another object of the present invention is to provide an electro-pneumatically operable core stacking machine which reduces the break down time & cost of spares.
Still another object of the present invention is to provide an electro-pneumatically operable core stacking machine which can improve the coefficient of filling.
STATEMENT OF INVENTION
According to this invention there is provided an electro-pneumatically operable core stacking machine comprising of a filling machine for magnetic cores connected to an improved control panel through a sliding plate movable within a pneumatic cylinder.
SUMMARY OF THE INVENTION
Machine can fill the bobbin by filling one by one strip of core (E & I shaped strip). Strip is in the stacked form in a magazine of machine (both side of machine)with the help of a programmable logic controller (PLC), Pneumatic Cylinder & pre-settable counter.
Staking of sheet metal components (E & I for transformer) can be made with reduced damage by forming layers from two sides in a bobbin having copper wire coiled of magnetic and insulating regions. The invention discloses automatic core filling machine in which there is a programmable logic controller (PLC), signal to pre-settable counter and a pneumatic cylinder. This is an electro,-pneumatic & mechanical core filing machine which saves the cores from damages. The two sensors (limit switch) are arranged to control the whole process and a pre-settable counter counts the number of piles going. In the present invention, movement of lever is controlled by electro-pneumatic device. The linear displacement of lever paches & pulls the lamination core at required position
BRIEF DESCRIPTION OF THE DRAWINGS

Further object is and advantages of this invention will be more apparent from the ensuing description when read in conjunction with the accompanying drawings and wherein:
Fig. 1 shows an upper perspective view of a core stacking machine; Fig. 2 shows a control panel;
Fig. 3a and 3b shows rod arrangement attached to the counter.
DETAIL DESCRIPTION OF THE PREFERRED EMBODIMENTS WITH REFERENCE TO THE ACCOMPANYING DRAWINGS
Reference is made to Fig. 1 which is a schematic representation of the possible form of execution of a stacking machine for magnetic cores. Multilayer components can be made with reduced cracking during the stacking of the core. The invention discloses a machine comprising of a programmable logic controller (PLC), signal to pneumatic counter and rod arrangement. It is an electroneumatic core filling machine wihch saves the cores from damages. This are provided with at least two sensors (limit switch)arranged to control the whole process and a presettable counter, which counts the number of piles. The rod is moved by an electro-pneumatic device. Only simple linear displacement of lever pushes & pulls the lamination core at required position.
The machine according to the ininvention is an electro-pneumatically operable machine having control panel. The panel comprising of pre programmed PLC with pre-settable counter controlling the motion of the sliding plate with the help of solenoid valve & sensors fitted on the ppneumetic cylinder's both ends. When the piston moves to the end of cylinder, sensor senses magnatic ring is there on piston) & gives the signal to solenoid. Further, it releases the pressure from one port & gives the pressure to the second port that operates the cylinder. This movement will stop when the pre-set count in the pre-settable counter will match.
The machine includes a supporting base 10, adapted to rest on a bench or table top, a sliding plate designated 11 and a PLC controlled drive mechanism 12 mounted on the right side of the base 10. The base 10 serves as a frame since it is a single casting. The base 10 includes a relatively small left-hand pedestal 13, a central recess area 14, and a right pedestal 15. A connecting portion 16 extends along the bottom of the base 10 between the pedestals 13 and 15.
The sliding plate 11 has one end supported by the pedestal 13 and the other end supported by the pedestal 15, and it straddles the opening 14. The opening 14, of course, is located below the center of the sliding plate 11, and it permits an operator to have access to the bottom of a coil (one being shown and designated 17 in the drawing) for straightening leads, if needed. The coil 17 is held in the center of the sliding plate 1 at a coil station (18) when laminations are being inserted therein. On either side of the coil station 18 are located magazines (19 and 20). Each of the magazines is similar, and they include respective slots for holding a stack of I-plates 21, 22 and slots %t holding stacks of E-plates 23, 24. The I-plates are located closer to the coil station 18 than the E-plates.
The vertical side plates for the magazines 19, 25 are mounted to the tops of first and second elongated side rails 25, 26 which form the supporting frame for the elements of the sliding plate 11. The side rails 25, 26 are secured together by means of lower transverse bars and designated. Fair of slots is machined in the side plates 25, 26 and they slidably receive a reciprocating slide. The stacks of E-plates and I-plates rest in their associated magazines on the slide surfaces.
Picking and pushing machanisms are mounted on the top of the slide so that when it is
reciprocated, for example from left to right as shown in FIG. 1, an E-plate is picked from the stack and it is conveyed along the rails beneath the stack of I-plates toward the coil. As the E-plate passes beneath the stack, an I-plate is picked from the bottom of that stack, thus forming a first pair of plates. Gauging members are employed at the front of each of these stacis so that only a predetermined number of plates are picked (usually one). The I-plate is then superposed on the E-plate and this first pair is brought to an intermediate position, as at 27 in FIG. 1 and deposited there.
The plate is then reciprocated toward the left thereby gathering a similar second pair of superposed plates including an E-plate from the stack and an I-plate from the stack which are deposited at an intermediate location 28 in superposed relation. Thus, when the slide reaches its leftmost position, it is ready to pick a third pair of plates-again from the
magazine. At the same time, however, a pusher surface is introduced adjacent to the location to push the previously deposited first pair of plates in that location into assembled relation in the coil. The I-plate being on top, engages a previously inserted E-plate to complete the surrounding of the coil, and the E-plate being on the, bottom of the stack. Similarly, on the next leftward reciprocation of the slide, a fourth pto of pla|es is selected from the magazine 10 and the second pair of plates is simultneously arged into assembled relation with the coil. Thus, for each reciprocation during normal operation,
one pair of superposed plates is being picked from a magazine 19, 20 and a previously-picked pair is being moved into assembled relation in the coil, the final E-plates being
inserted from alternate sides to produce an interleaved stack. The present invention is directed toward a machine which will accommodate heads for different size laminations. Thus, the "head" encompasses the structure described above and including the magazines 19, 20, the side rails, the central core station, the
reciprocating slide, and all of the mechanisms on the slide for picking laminations from
the magazines 10, delivering them to the intermediate locations and hence inserting them into the coil.
The pedestal includes an upper horizontal surface which is co-planar with an upper horizontal surfaces of the pedestal. These two surfaces support the side rails of the interchangeable headl. Since these side rails are located at different spacings depending upon the size of the lammations, these upper flat surfaces accommodate the different size heads. A vertical pin is provided in the pedestal extending upward of the surface and is adapted to receive in a cylindrical aperture in the transverse connecting bar. Each head has a similar connecting bar and aperture at one end thereof. The function of the pin is to locate the head and to prevent its moving in a longitudinal direction.
A slot is machined in the pedestal and extends in the direction of reciprocation of the slide. A cross head generally designated includes an elongated rectangular arm which is slidably received in the slot and includes an upper surface which is co-planar with the surface of pedestal. A transverse member is welded to the top of the arm at a position
remote from the head and it includes a slot or way which extends perpendicular to the direction of reciprocation of the arm. At the distal end of the arm, there is provided a vertical pin adapted to be received in an aperture in the slide. Thus, the interchangeable heads are replaced or mounted to the base by lowering the apertures respectively onto the pins. Preferably, the cross head is first positioned in an extreme right-hand position, the slide is pulled to its right-most position and the aperture being placed over the pin prior to placing the aperture over the pin.
Reference may be made to fig. 2a, 2b wherein a rod member with a flange is slidably mounted in a cylinder member such that the flange divides a cavity in the cylinder into a left and right portion. The cylinder moves to and fro with the air pressure.
A control panel 29 comprising of preprogrammed PLC with pre-settable counter 30, which controls the motion of the sliding plate 11 with the help of solenoid valve & sensors 31 fitted on both the sides of the pneumatic cylinder 32. When the piston 33 moves to the end of cylinder the sensor 31 senses (magnetic ring is there on piston) & gives the signal to solenold. It also releases the pressure from one port 34 & gives the pressure to the second port 35 that operates the cylinder 32. This movement will stop when the pre-set count in the pre-settable counter 30 will match.
Thus through such a system, multilayer components can be made with reduced cracking during the stacking of the core. Since in this arrangement it is not required to put number of strokes for one transformer, therefore, the alignment of the core is not bent and huge quantity of material is saved. The system is electroneumatic wherein, the pressure can be controlled.
Further, reference may be made to Fig. 3 wherein a rod arrangement is attached to the counter. A rod 33 member with a flange is slidably mounted in a cylinder 32 member such that the flange divides a cavity in the cylinder 32 into a left and right portion. Intake and exhaust passages are moved in and out of communication with the cavity on both sides by the moving interface of the rod 33 and cylinder 32, such that an alternating force
is exerted on the flange causing the flange and rod 33 member to move in a reciprocating motion without the use of an auxiliary system of valve switching. The valve mechanism directs the compressed air supply, through the valve body to the selected output ports or stops the air from passing through the valve. Cylinders 32 are either single acting (spring return) or double acting (air return).
The moving rod 33 connected (thru sensors) to the PLC controller is programmed in such a way that it counts up to required number of turns. Thus, the moving rod moves to and fro as per the count. The push and pull movement of the moving rod creates/ fills the gaps between the cores.
It is to be noted that the present invention is suseptible to modifications, adaptations and changes by those skilled in the art. Such variant embodiments employing the concepts and features of this invention are intended to be within the scope of the present invention, which is further set forth under the fllowing claims: -

CLAIM:
1. An electro-pneumatically operable core stacking machine comprising of a filling machine for magnetic cores connected to an improved control panel through a sliding plate movable within a pneumatic cylinder.
2. An electro-pneumatically operable core stacking machine as claimed in claim 1 wherein the improved control panel comprising of a programmable logic controller (PLC) having a presettable counter and atleast two sefiors with
solenoid valve.
3. An electro-pneumatically operable core stacking machine is claimed in claim 2, wherein the programmable logic controls the motion 'of the sliding plate with the help of solenoid valve and sensors fitted on both sides of the pneumatic cylinder.
4. An electro-pneumatically operable copre stacking machine as claimed in any of the preceding claims wherein when the piston moves to the end of cylinder, sensor senses and signals to solenoid and it releases the pressure from one port and gives the pressure to second port for operating the cylinder.
5. An electro-pneumatically operable core stacking machine as claimed in any of the preceding claims wherein the piston i.e. rod member with a flange is slidably mounted in the cylinder such that the flange divides a cavity in the
cylinder into a left and right portion in which movement of the piston stops when the pre-set count in the presettable counter will match.
6.An electro-pneumatically operable core stacking machine substantially as
herein described with reference to the accompanying drawings.