US2960051A

US2960051A - Spinning tool

Info

Publication number: US2960051A
Application number: US625129A
Authority: US
Inventors: Jr Henry S Darlington
Original assignee: AH Wirz Inc
Current assignee: AH Wirz Inc
Priority date: 1956-11-29
Filing date: 1956-11-29
Publication date: 1960-11-15
Anticipated expiration: 1977-11-15

Description

H. s. DARLINGTON, JR 2,960,051

SPINNING Toor.

8 Sheets-Sheet 1 INVENT .mum

Nov. 15, 1960 Filed Nov. 29, 1956 Nov` 15, 1960 H. s. DARLINGTON, JR

SPINNING TOOL B Sheets-Sheet 3 Filed Nov. 29, 1956 Herz 2:5/ Ji arzhj 8 Sheets-Sheet 4 N mi ,um m

SPINNING TOOL H. S. DARLINGTON, JR

' ATTORNEYS. v

Nov. 15, 1960 Filed Nov. 29. 195e Nov. 15, w60 H. s. DARLINGTON, JR 2,960505 SPINNING TOOL Filed Nov. 29. 195e a sneetsMsneet s l A l! 1.71m...

Nov. 15, 1960 H. s. DARLINGTON, JR 2,960,051

SPINNING Toor.

Filed Nov. 29, 1956 8 Sheets-Sheet 6 Nov. 15, 1960 H. s. DARLINGTON, JR 2,950,051

SPINNING Toor.

Filed Nov. 29, 195e a sheets-sheet v mv NToR Hemyd. army om, Jr.'

ATTORNEYS Nov. l5, 1960 H. s. DARLxNGToN, JR 2,960,051

SPINNING TOOL Filed Nov. 29. 1956 a sheets-sheet s ijnited States Patent SPINNING TOOL Henry S. Darlington, Jr., Media, Pa., assignor to A. H`

Wn-.2, Inc., Chester, Pa., a corporation of Pennsylvama Filed Nov. 29, 1956, Ser. No. 625,129

3 Claims. (Cl. 113-52) The present invention relates to a spinning tool adapted to spin the flanges on collapsible tubes or the like.

The purpose of the invention is to provide a spinning head which rotates on bearings, to mount one or preferably a plurality of spinning fingers on the spinning head, to provide a spinning roller or rollers rotatably mounted on one end of the spinning finger or fingers, and to pivot the spinning `finger or fingers in a direction to move the spinning roller or rollers radially inwardly in order to spin a flange.

A further purpose is to push a collar surrounding the spinning head longitudinally against ends of spinning lingers in order to move the spinning lingers and spinning rollers inwardly.

A further purpose is to provide a feed plunger which moves inside the spinning head and feeds a tube neck to the collapsible tube.

A further purpose is to carry the neck insert across the intervening space in order to position it on the collapsible tube by bringing the plunger into engagement with a guide pin on the mandrel, the guide pin on the mandrel desirably having cam surfaces which tend to centrally locate the neck insert.

A further purpose is to provide a feed trough extending transversely from the line of motion of the plunger and to coordinate the action of a feed valve across the other end of the feed trough with the motion of the feed plunger.

A further purpose is to interpose lost motion means on the feed plunger.

Further purposes appear in the specification and in the claims.

In the drawings I have chosen to illustrate one only of the numerous embodiments in which my invention may appear, selecting the forms shown from the standpoints of convenience in illustration, satisfactory operation and clear demonstration of the principles involved.

Figure l is a top plan view of the device of the invention, with the mandrel supporting shaft broken away.

Figure 2 is a fragmentary side elevation of the device of Figure l, omitting the mandrel.

Figure 3 is an enlarged fragmentary front elevation showing the spinning rollers and the spinning head with a portion of the feed trough, omitting the mandrel.

Figure 4 is an enlarged fragmentary section on the line 4--4 of Figure l, in retracted position.

Figure 5 is a view similar to Figure 4 in advanced position.

Figure 6 is a section on the line 6 6 of Figure 2.

Figure 7 is a section on the line 7-7 of Figure 2.

Figure 8 is an enlarged fragmentary diagrammatic perspective showing the valve escapement mechanism for feeding the neck inserts.

Figures 9, l0 and ll are fragmentary enlarged sections showing the plunger, with the neck insert thereon about to engage in the collapsible tube on the mandrel in Figure 9, showing engagement just having taken place in Figure l0, and showing the completed rolled operation in Figure ll.

ice

It is desirable to spin flanges and the like on collapsible tubes and other containers for the purpose of anchoring neck inserts or other components. It is difficult to perform this operation without delay due to the fact that in many cases the components must be fed into assembly relationship along a path which would interfere with the operation of the spinning means, and then the spinning means must become effective without delay in order to secure the components together.

I have discovered that this problem can be solved effectively by feeding the insert longitudinally to the assembly position, and swinging the spinning rollers on fingers so that they move inwardly after the insert is passed, without obstructing the insert path.

A further desirable feature of theinvention which is preferably used, is that the insert is guided across the space from the plunger to the collapsible tube by engaging with the plunger a guide pin on the mandrel.

Accordingly it is possible, using the principles of the invention, to spin radially while the spinning rollers are' turning.

Furthermore, the inward motion of the spinning rollers as they turn produces a very desirable force distribution which tends to make the result highly effective.

Considering now the drawings, a bracket 20 supports

upstanding lugs

21 and 22 in two spaced sets which support longitudinal parallel guide rods 23. The guide rods mount a sliding body 24 by means of guides 25 which surround the guide rods and carry sliding guide bushings 26 acting on the guide rods.

The body 24 has a longitudinally extending circular opening 27 which receives a hollow cylindrical rod 28 which at the forward end carries antifriction, suitably ball bearings 30 and 31 mounted on opposite sides of a shoulder 32 and retained by a retainer 29 having a snap ring portion engaging in the recess. The rearwardmost bearing rides against a spacer 33 and the entire bearing and rod structure is held iirm by a nut 34 threaded on a thread 35 provided on the rod 28 at the rear of the body.

vThe body and the rod 28 are reciprocated back and forth by a barrel cam 36 on a cam shaft 37 having a cam track 38 which engages a follower roller 40 carried on a follower lever 41 which has a fixed pivot at 42, as best seen in Figure 2. The follower lever 41 at its end remote from the pivot 42 makes pivotal connection at 43 with an adjustable link 44, the opposite end of which makes pivotal connection to a pin 45 on the forward end of the body. The adjustments assist in regulating rolling pressure on rod 44.

The bearings 30 and 31 mount a spinning head 46 which rotates on the bearings and which at its rearward end carries a pulley 47 which is driven from belt 48 to pulley 50 on shaft 51. The drive permits the spinning head to reciprocate while rotating.

The spinning head at its forward end, and at suitably l20 circumferential spacings, carries tangential pivots 52 extending tangential to the circle of rotation across slots 53, which pivotally mount L-shaped spinning fingers 54, best seen in Figures 4 and 5.

At the forward ends, the spinning lingers carry axles 55 which mount antifriction bearings, suitably ball bearings 56, which pivotally support spinning rollers 57, best seen in Figures 2, 3, 4 and 5. The spinning rollers have forwardly and inwardly inclined concave rims 58 which are adapted to spin and shape the flange of the work to be described, and on the opposite side of a peak 60 there are rearwardly and inwardly diagonally extending rim portions 61.

Helical compression springs 62, acting in cooperating spring wells of the fingers and of the spinning head, urge the fingers at the forward ends andthe spinning rollers radially outward. On the rearward ends, the fingers carry bearing mounting axles `63 which secure antifriction bearings, suitably ball bearings 64, the outer races of which engage the forward edge of collar 65 surrounding the spinning head. The collar is journalled with respect to the rotating spinning head by a bushing 66 interposed between the collar and the spinning head.

The collar at diametrally opposite positions carries pivot axles 67 which pivot rollers 68 which engage in U slots 70 on the ends of a yoke 71. The yoke intermediate its ends is pivoted by a pin 72 secured to the body. At the end remote from the engagement with the roller `67, the yoke carries a roller 73 pivoted on a pin 74.

In the forward position of the body, the roller 73 engages against a stop plunger head 75 on a stop plunger 76, best seen in Figures 4 and 5. The plunger extends through a spring receiving opening 77 of a stop housing 78 on the bracket and extends through an opening 80 at the forward end of the stop housing. A spring washer 81 engaging in a suitably annular slot in the plunger prevents the plunger from moving too far rearward while engaging the forward end of the stop housing. A helical compression spring 82 urges the stop plunger toward rearward position and occupies the spring recess surrounding the plunger, acting between the plunger head and the forward end of the recess.

It should be kept in mind that the spring 82 is a relatively heavy spring so that the spring abutment will resist compression of the spring 82 initially and overpower the springs 62, bringing the rollers 57 into closed position and then, after the rollers are closed and are in working position, the spinning head is permitted to move further forward by a compression of spring 82.

A push rod 84 operates in a longitudinal passage 83 through the rod 28, the push rod consisting of body 85 and a forward plunger 87.

At the forward end, the plunger 87 has lost motion in a forward bore 95 of the body 85 and is urged toward the forward position by helical compression spring 96 which acts between the base of the bore and the inner end of the plunger. The plunger is limited in forward motion by pin 97 which extends across the body 85 of the push rod through a slot 98 in the plunger. The forward end of the plunger is relatively pointed at 100 and tits inside the hollow of the neck insert and mates with the guide rod as later explained.

The motion of the push rod is controlled by a barrel cam 101 having a track 102 which manipulates a follower roller 103 on follower lever 104 which is pivoted on a ixed pivot 105. The follower lever at the end opposite from the pivot 105 makes pivot connection 106 with an adjustable link 107. The adjustment determines the spring pressure exerted to hold the neck insert into the socket of the tube.

The link has a slot 108 at the far end which receives a pin 110 which is mounted on a lever 111 intermediate between the ends of the lever. The lower end of the lever 111 has a fixed pivot 112 on the bracket 20. The link is urged toward forward position of the lever 111 by a helical tension spring 113 acting between the spring abutment 114 on the link and a spring abutment 115 on the pin 110.

The lever 111 at its end remote from the fixed pivot 112 carries a pin 116 which extends across through longitudinal slots 117 in the rod 28 and through an opening 118 in push rod base `85, and through openings in collar 119 which surrounds and rides on the outside of rod 28.

The rod 28 at an intermediate position in its ends has a transverse downwardly extending slot 120 which is suitably of T-shaped cross section in plan to receive successive neck inserts which pass down through a similar slot 121, aligning with the slot 120 and extending through the top of the body, This slot 121 is located below a suitable T-slotted feed channel ,122, which carries in transverse recesses 123, a pair of

valve plates

124 and 125 which are vertically separatedV by fillers 126 and secured together by rivets i127, best seen in Figures 6 and 8. The valve plates have laterally displaced vertical T-

slots

128 and 129. The valve plates in the position of Figure 8 obstruct motion of neck inserts downward through the feed channel but permit one neck insert entrapped between

valve plates

124 and 125 to feed downward. In the opposite position the valve plates permit one neck insert to become entrapped between the valve plates.

One valve filler has an extension 130 which carries a pin `131 (Figure 8) which engages in a slot 132 on a lever 133 which is at one end of la rock shaft 134 passing downward through an opening 135 in the body. The lever 133 is held angularly with respect to shaft 134 by clutch 133 which is urged in engagement by helical compression spring 1332 acting at one end against collar 1333 and at the other end acting against the lever 133. This arrangement permits relative slippage of the lever 133 with respect to the rock shaft 134 in case of overload, as due to breakage of an insert or feeding of some component for which the feed has not been designed. The rock shaft at its lower end carries a lever 136 which is resiliently urged from the outer end toward cut-off position of the valve by helical tension spring 137 which is anchored at one end to a spring abutment 138 at the end of the lever 136, and to abutment 140 on the bracket at the other end. The striking of the lever against an adjustable abutment 139 in retracted position of the body opens the valve.

As shown in Figure l, a wheel 141 on a shaft 142 supports a series of mandrels `143, only one of which is shown, and moves the mandrels intermittently to center them with the action of the spinning device. :Collapsible tubes n144 are pushed on the mandrels, each of the tubes having a skirt or side wall 145, a shoulder 146, and an annular iiange 147 which is to be spun over to engage the neck insert. The shoulder extends radially inwardly of the flange and terminates at a central opening.

The -neck insert as shown in Figures 9, 10 and ll is suitably formed of plastic, and has a threaded neck portion 148 and a base rim portion 150 which is shown in Figure 111 engaging inside the ange, and is held by spinning over the ange at 151.

The forward end of the mandrel mounts an annular plug 152 which receives a guide pin i153 centrally located in the forward end of the mandrel and having an operative end member extending through openings 154 in the tube and at the forward end tapering at 155 to guide the insert into central position with respect to the other tube. At the very forward end the guide pin has a suitably tapered locater recess 156 which as shown in Figure l0, mates with the end of the plunger 87.

In operation of the device, when the body is retracted, the mandrel wheel indexes to bring a new mandrel and collapsible tube mounted thereon into registry with the axis of the spinning mechanism. Then from retracted position, the spinning rolls are outwardly urged by the springs 62 into the position of Figure 4, the collar 66 is retracted under the action of these same springs, and the controlling cam moves the push rod into retracted position as shown in Figure 4.

The valve on the feed chute is retracted by the lever 136 striking adjustable abutment 139, and a neck insert feeds down into the position in front of the plunger in the hollow passage 83.

Then, under the control of the cam 101, the push rod moves forward and at the same time, under the action of cam 36, the body moves forward, the two cams being timed such that the neck insert is positioned through the hollow shaft and into the opening of the collapsible tube just prior to the closing of the rollers. As the body moves forward, the roller 73 engages spring plunger 75, which action closes the rollers 57, as spring 82 is stili. In closed position the rollers carry forward with the body the rest of the way under the intluence of the spring plunger. As the plunger moves forward spring 96 is compressed, providing lost motion between the body of the push rod and the plunger. At the same time lost motion of the pin 110 causes the front of the body 85 to engage the rim of the forward end of the neck insert. All of this time, the spinning head is rotating, and as the spinning rollers are moving inwardly, they engage and spin over the flange as shown in Figure 5.

It will be evident that the neck insert has been fed through the space which the spinning rollers later occupy since the spinning rollers are pushed outward 'when the neck insert is fed and later move inward.

Next, the body is retracted, and the collar 65 moves relatively back, allowing the spinning rollers to move radially outward and to clear the end of the mandrel. In this position, the mandrel Wheel indexes to bring a new mandrel and collapsible tube into spinning position.

It will be evident that the mandrels can be used to perform other operations on the collapsible tubes while mounted on the mandrels. For example, coating or other similar operations may be performed.

It will also be evident that the principles of the invention can be applied to perform other functions beside spinning, such as for example, rolling threads, trimming, or capping, as desired. It will also be understood that instead of a neck insert a nipple, applicator or nozzle may be used.

In View of my invention and disclosure, variations and modifications to meet individual whim or particular need will doubtless become evident to others skilled in the art, to obtain all or part of the benefits of my invention without copying the structure shown, and I, therefore, claim all such insofar as they fall within the reasonable spirit and scope of my claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

l. In a device for spinning collapsible tubes and securing an insert therein, a rotatable spinning head having an axial opening, having a radially movable spinning finger pivoted on the spinning head and having a spinning roller rotatably mounted at the forward end of the spinning finger, a longitudinal guide having 4an opening extending axially of the spinning head to a point interior of the spinning head and having a side feed opening which extends into the axial opening, a feeding plunger extending through the axial opening of the guide and through the interior of the spinning head, having a retracted position more remote from the spinning head than the side feed opening at which it is adapted to receive an insert to feed forward into the spinning head, and having an advanced position in which it centers and holds said insert in position to be engaged by a collapsible tube, mandrel means to support a collapsible tube with its forward end in line with the axis of the spinning head and adjacent the spinning roller, and with a flange on the collapsible tu-be in position to be formed by the spinning roller, means to reciprocate the feeding plunger forward to move an insert into engagement with the collapsible tube, and means for moving the spinning finger inwardly against the flange of the collapsible tube.

2. A device of claim l, in combination with means for reciprocating the spinning head forwardly and rearwardly, and a guide on the mandrel means mating with the plunger in forward position of the plunger.

3. In a device for spinning metal, a rotatable and reciprocable spinning head, means to rotate the spinning head, a spinning finger pi-votally mounted on the spinning head, permitting the forward end of the spinning linger to move toward and away from the axis of the spinning head, -a spinning roller rotatably mounted `on the forward end of the spinning finger, a collar surrounding the spinning head and acting on the spinning finger, the collar being adapted by motion in one direction axially of the spinning head to move the spinning finger to urge the spinning roller radially inwardly, spring means acting on the spinning finger to retract the spinning finger, means for shifting the collar axially, comprising a lever pivoted intermediate its ends, movable longitudinally with the spinning head and interconnected at one end with the collar, and spring abutment means fixed relative to the spinning head located on the side of the pivot opposite from the collar and acting on the lever so that during longitudinal movement of the lever it will engage the spring abutment means and pivot, producing movement of the collar and actuation of the roller, said spring abutment means being relatively stiffer than the spring means acting on the finger, whereby the spring abutment means when engaged moves the spinning roller first to operative position and then compresses to permit forward overtravel of the spinning head.

References Cited in the fle of this patent UNITED STATES PATENTS 852,323 Fulenwider Apr. 30, 1907 1,980,440 Rapple Nov. 13, 1934 2,237,614 Perrone Apr. 8, 1941 2,252,532 Temple Aug. 12, 1941 2,631,638 Levine Mar. 17, 1953 2,765,608 Ford et al. Oct. 9, 1956