Magnetic core forming system

Claim 2

Apparatus for forming magnetic cores having a desired periphery and having at least one hole comprising: means defining a path for movement of a sheet of magnetic core material; first die means disposed along said path on a first side thereof, said die means having a hole for defining said desired periphery of a magnetic core; second die means disposed along said path on a second side thereof opposite said first die means, said second die means including a punch portion for slidable insertion into said hole in said first die means, said punch portion having a hole formed therein for defining a hole in a magnetic core; third die means disposed on the same side of said path as said first die means and positioned opposite said second die means, said third die means having a coring portion for movement into said hole in said second die means; first operating means for moving said second die means into said first die means and for withdrawing it therefrom; second operating means for moving said third die means toward and into said second die means simultaneously with movement of said second die means into said first die means and for withdrawing said third die means from said second die means; and moving means for periodically advancing said sheet of magnetic core material a uniform interval along said path after said second die means is withdrawn from said first die means.

Claim 3

Apparatus for forming magnetic cores as defined in claim 1 wherein said moving means comprises material engaging means having a portion adjacent to said path for engaging a sheet of material and moving it along said path; and including: housing means; an advancing shaft mounted on said housing means; means for coupling said material engaging means to said advancing shaft; ratchet wheel means fixed to said advancing shaft; camshaft means mounted on said housing means; motor means for rotatively driving said camshaft means; material advancing cam means mounted on said camshaft means; and pawl means connecting said material advancing cam means and said ratchet wheel means for incrementally rotating said ratchet wheel means, whereby said sheet oF magnetic core material is advanced in uniform intervals.

Claim 4

Apparatus for forming magnetic cores as defined in claim 1 including: housing means; camshaft means mounted on said housing means; motor means for rotating said camshaft means; first cam follower means coupling said first cam means to said first operating means; second cam follower means coupling said second cam means to said second operating means, for operating said second operating means substantially simultaneous with the operation of said first operating means; and means coupling said third cam means and said moving means, for incrementally operating said moving means in synchronism with the operation of said first and second operating means, whereby said sheet of magnetic core material is advanced a uniform interval.

Claim 5

Apparatus for forming magnetic cores as defined in claim 1 including air jet means disposed on a side of said first die means which is opposite to said path, said jet means having an air outlet directed substantially across the end of the path of travel of said second die means into said first die means, for removing magnetic cores carried through said first die means by said second die means.

Claim 6

Apparatus for forming magnetic cores as defined in claim 1 including fourth die means having a rod portion with an end for projection through said hole in said punch portion of said second die means to eject slugs from said hole.

Claim 7

Apparatus for forming toroidal magnetic cores from a sheet of magnetic core material comprising: means defining a path for movement of said sheet; a first die having a hole in it defining the outer diameter of said magnetic cores, said first die positioned on a first side of said path; a second die having an end portion with the form of a hollow cylinder for insertion into said first die, said second die positioned on a second side of said path opposite said first die; a third die for insertion into the hollow portion of said second die, positioned on said first side of said path; reciprocating means for reciprocally moving said second and third dies simultaneously toward each other and for moving said second and third dies away from each other; and means for periodically advancing said sheet of magnetic core material a uniform interval along said path when said second and third dies are positioned away from each other and after said second die is withdrawn from said first die.

Claim 8

Apparatus for forming toroidal magnetic cores from a sheet of magnetic core material comprising: means defining a path for movement of said sheet; a first die having a hole in it defining the outer diameter of said magnetic cores, said first die positioned on a first side of said path; a second die having an end portion with the form of a hollow cylinder for insertion into said first die, said second die positioned on a second side of said path opposite said first die; a third die for insertion into the hollow portion of said second die, positioned on said first side of said path; reciprocating means for reciprocally moving said second and third dies simultaneously toward each other and for moving said second and third dies away from each other; and means for periodically advancing said sheet of magnetic core material a uniform interval along said path when said second and third dies are positioned away from each other and after said second die is withdrawn from said first die.

Claim 9

Apparatus for forming magnetic cores as defined in claim 6 including ejecting means within said hollow cylindrical end portion of said second die for movement relative to said end portion along its axis to eject slugs therefrom.

Claim 10

Apparatus for forming magnetic cores as defined in claim 7 wherein said ejecting means comprises a rod positioned within the hollow portion at the end of said second die, said rod having an end projecting substantially past said second die when said second die is in a position furthest from said path of said sheet, whereby to automatically eject slugs from said second die when it is moved to its extreme position away from said sheet.

Claim 11

Apparatus for forming magnetic cores as defined in claim 6 wherein said reciprocating means comprises: camshaft means for holding cam means; motor means for rotatably driving said camshaft means; first cam means mounted on said camshaft means for operating said second die; means coupling said first cam means to said second die for moving it toward and away from said third die; second cam means mounted on said camshaft means for operating said third die; and means coupling said second cam means to said third die for moving it toward and away from said second die, whereby said second and third dies are moved synchronously with respect to each other.

Claim 12

Apparatus for forming toroidal magnetic cores from a sheet of magnetic core material comprising: housing means defining a path for movement of said sheet therealonG; first die means positioned along said path on a first side thereof, having a plurality of spaced circular holes, each hole defining the outer diameter of a magnetic core; second die holding means for holding a plurality of second dies, said second die holding means positioned on a second side of said path opposite said first die means; a plurality of second dies mounted on said second die holding means, each of said second dies having a hollow substantially cylindrical portion aligned with a hole in said first die means for movement therein to punch a disc of material from said sheet; third dieholder means positioned on said first side of said path for holding a plurality of third dies; a plurality of third dies mounted on said third dieholder means, each of said third dies having a substantially cylindrical coring portion for movement into the hole in one of said second dies to punch a core from a disc formed by said second die; first reciprocating means for reciprocally moving said second die holding means toward and away from said first die means to alternately insert and withdraw said second dies into and from said first dies; second reciprocating means synchronized with said first reciprocating means, for reciprocating said third dieholder means toward and away from said path to alternately insert and withdraw said third dies into and from said second dies; and means synchronized with said first reciprocating means, for periodically advancing said sheet a uniform interval along said path after said second dieholder means is in a position away from said first die means and said second die is withdrawn from said first die means.

Claim 13

Apparatus for forming toroidal magnetic cores from a sheet of magnetic core material comprising: housing means defining a path for movement of said sheet therealonG; first die means positioned along said path on a first side thereof, having a plurality of spaced circular holes, each hole defining the outer diameter of a magnetic core; second die holding means for holding a plurality of second dies, said second die holding means positioned on a second side of said path opposite said first die means; a plurality of second dies mounted on said second die holding means, each of said second dies having a hollow substantially cylindrical portion aligned with a hole in said first die means for movement therein to punch a disc of material from said sheet; third dieholder means positioned on said first side of said path for holding a plurality of third dies; a plurality of third dies mounted on said third dieholder means, each of said third dies having a substantially cylindrical coring portion for movement into the hole in one of said second dies to punch a core from a disc formed by said second die; first reciprocating means for reciprocally moving said second die holding means toward and away from said first die means to alternately insert and withdraw said second dies into and from said first dies; second reciprocating means synchronized with said first reciprocating means, for reciprocating said third dieholder means toward and away from said path to alternately insert and withdraw said third dies into and from said second dies; and means synchronized with said first reciprocating means, for periodically advancing said sheet a uniform interval along said path after said second dieholder means is in a position away from said first die means and said second die is withdrawn from said first die means.

Claim 14

Apparatus for forming magnetic cores as defined in claim 10 wherein: said third dieholder means comprises walls forming an elongated undercut slot; and each of said third dies comprises a rod having a flange disposed within said undercut slot.

Claim 15

Apparatus for forming magnetic cores as defined in claim 10 including: air jet means located on a side of said first die means opposite said path, and having an outlet means directed across the ends of the paths of said second dies for removing cores by air movement; and chute means having an opening facing said outlet means for collecting cores.

Claim 16

Apparatus for forming magnetic cores as defined in claim 10 wherein said second dies are normally positioned above said first die, to allow toroidal cores to drop off of said second dies while they are projecting through said first dies; and including: ejecting means for ejecting slugs in said second dies when said second dies are withdrawn from said first die means; and means disposed on said second side of said path for collecting slugs ejected from said second dies.

Claim 17

Apparatus for forming magnetic cores as defined in claim 13 wherein said means for collecting slugs comprises slug receiving pipe means for receiving slugs and air pipe means for directing a jet of air across the end of said second dies and into said slug receiving pipe means.