US2579951A

US2579951A - Apparatus for casting heads on pins

Info

Publication number: US2579951A
Application number: US653742A
Authority: US
Inventors: Louis H Morin; Gries Otto
Original assignee: Crown Fastener Corp
Current assignee: Crown Fastener Corp
Priority date: 1946-03-12
Filing date: 1946-03-12
Publication date: 1951-12-25
Anticipated expiration: 1968-12-25

Description

Dec. 25, 1951 H.- MORlN ETAL APPARATUS FOR CASTING HEADS on PINS 2 SI lEETS-SHEET 11 ,Filed March 12, 1946 INV NToRs 100/5 Mam/N Orro 60/55 BY ATTO Dec. 25, 1951 H. MORIN ErAL APPARATUS FOR CASTING HEADS on PINS 2 SHEETS-SHEET 2.

Filed March 12, 1946 Patented Dec. 25, 195i 7 Louis H. Morin, Bronx, and out Gries, New nochelie, N. Y.;' said Gries assignor to Crown Fastener corporation, Wafiii, R. L, a corporation of Delaware Application March 12, 1946, Serial No. 653,742

5 '(llallns. (Cl. ifi-30) This invention relates to the formation of die cast heads or enlarged bodies on one end or a pin or rod-like element. More particularly, the invention deals with a novel apparatus for con- 2 ata trimming station and simultaneously in the operation of forming a next successive casting. Still more particularly, the invention deals with a method of delivering pins or other rod-like trolling delivery of the pin element or other 5 elements or workpieces to the casting and trimworkpiece from the discharge end of a hopper m-ing stations and in discharge of trimmed castmagazine to casting and trimming stations and ings from the machine and in performing these in final discharge of the trimmed products from operations in such manner as to maintain a high themachine, Still more particularly, the invenrate of production, depending upon the speed of tion deals with an apparatus wherein the pins operation of the dies and upon the type and kind or other workpieces are supported in the magaof casting material employed. zinc in horizontal position and maintained in In Fig. 1 of the drawing is shown a pair of such position at the casting and trimming stadieoperating members [5 and I6 upon which a tions, and further wherein in forming the cast pair of die blo k's a I a mou t n te head on one pin, the head of a previously formed 5, the die blocks having Cavities p pin is trimmed, thereby facilitating production si ns l9 an wi h whi h m n gate passages of cast heads on pins or similar workpieces at a l a d 2 register and passages 3 d 4 for relatively high rate of speed and consistentwith receiving the shank of p s o other rod-like predetermined opening and closing movement of workpi ces 5- The pins or workpieces have a pair of casting dies employed. The novel 'fea- 20 heads 6 adapted to be Positioned a al y tures of the invention will be best understood fi li the cavities o impressions l9 a d 29. from the following descriptions when taken tocb W 2 0f t d aw g, diagether with the accompanying drawing in which grammatically illustrated at 2! is a goose necko'r certain embodiments of the invention are disother unit havin a discharge nozzle 28 for closed and in which the separate parts are dos 25 dificha'lgiflg heated casting material, S a a ignated by suitable reference characters each metal anoy or a p st n t v y or p sof the views,- and in which; sion of the dies when the latter are in closed Fig. 1 is a front face view of a part, f ast.- pos'ition. Below the forming impressions I9 and ing machine with part of the construction broken 0, th s also have an impression r avity. as away and in section. 30 at 29, note Fig. 2, for the reception of the cast Fig. 2 is a vertical sectionalview substantially head 3 vi g th ate p rt n 3| protrudin on t line 2.;2 of Fig 1 w th p rt of t 15 to be trimmed off by trimming tools 32, indicated ture shown in elevation, as indicated by the in dotted lines in Fig- 5 of the d wi e broken lines in Fig. 2 of the drawing. cavity29 also includes a portion 33 for receiving Fig. 3 is a partial section on the line 3 3 of and supporting the shank of the pins or work- Fig. 1, omitting parts of the base structure ill'u'sp eces 25 jac the c e ds 3". trated in Fig. 1. The-dieoperating members l5 and It are re- Fi 4 i a, ti l t o on th fi e 424' of cessed adjacent inner surfaces of the dies to re- Fig. 2 on an enlarged scale, showing primarily ceive

pinguiding plates

34 and 35, and another the workpiece feed and control mechanism in 0 P Of Similar Plates and e p s n position preparatory to delivering a workpieceto spaced relation to' outer surfaces of the members a casting station, with parts of the dies illustrated I Sand" [6, note Figs. 2 and 5 of the drawing. in the background. Between the

plates

34 and 34, the member Fig. 5 is a partial section on the'line' 5--5 of l5 h a p j ti pin p kp n f d fin er Fig. 4; and 36 below which is a table portion 37 extending Figs. 6 to 10 inclusive, are diagrammatic views showing successive steps in the methodof delivering the workpiece to successive stages in the cycle or operation of the machine.

The present invention deals with casting machines for pressure injecting heated castingmaserial, such as metal alloys or plastics in the cavities or impressions of a pair of relatively movable dies wherein the dies include a pair of trimming tools for trimmingcastings supported a' greater distance than thefinger 36 and spaced from thefin'ger 36 by a large recess 38. The table portion 31 isof a height or thickness corresponding to the spacing between a pin supported at the casting station and a pin supported at the trimming station. The table 3'! forms a support for thepin at the casting station, and the lower surface 31' of the table portion clears the upper surface of thepin at the trimming station when themes are movedinto closed position. Below 3 the table member 3? is a recess 39 which is adapted to receive the projecting table or shelf portion 45 of the member l6, note in this connection Fig. 4 of the drawing. The upper surface of the table portion 31 serves to support the pin in proper position at the casting station. The member I6 is recessed above the table or shelf portion 45, as seen at 4|, to'receive the table portion 31 when the dies move into closed position.

Suitably supported permanently above the die.

operating members l5 and I6 is a magazine 42 disposed at the lower end portion of a suitable hopper feed, not shown, and into which magazine pins are dropped for vertical stacking, in the manner partially illustrated in Fig. 4 of the drawing. The magazine comprises a U-shaped frame 43, note Fig. 3, in which is supported two

guide plates

44 and 45 by suitable clamps as at 45 and 41. Arranged between the

plates

44 and 45 are peripheral or edge spacer strips 48 and'49 for guiding and locating the pins 25, and particularly the heads 26 thereof for alined delivery with respect to the cavities or impressions l9 and 20 of the dies l1 and I8.

The lower discharge end of the magazine 42 is shown adjacent the upper surface of the die operating members l5 and I6 and the dies l1 and I8 supported therein. The inner edge of the guide strip 48 is curved, as seen at 48, in Fig. 2 of the drawing and the inner surface of the strip 49 is also curved, as seen at 49 in said figure. Between these surfaces and between the surfaces of the

plates

44 and 45 are pin guide channels 53 which open through the lower surfaces of the magazine 42 and onto the upper surface 36' of the feed finger 36, note Fig. 4.

The plates 3434' and the plates 35-35 are secured to the lower portion of the

plates

44 and 45, one of which attachments is indicated at the left of Fig. 1, and as further indicated in dotted lines in Fig. 2. The plates 34-34 include at their upper ends shelf extension 5! for supporting the pins 25 in the channel 50. The plates 35-35 have cut out portions 52 spaced above the shelf 5! to form an angular extension 50 to the channel 50, note Fig. 4, which opens into another downwardly extending channel 50" between adjacent surfaces of each pair of plates 34-35 and 34-35, the channels 50" of both pairs of plates being in alinement, as will appear from a consideration of Fig. 5 of the drawing. The

channels

50, 50 and 50" guide and position the pins 25 between the dies and further control final delivery of the cast headed pins from the machine, as shown for example in Fig. 10 of the drawing. In other words, the pairs of plates 34--35 and 34-35' remain stationary at all times, and are 54 of the plate 45 by suitable bolts as at 55. The

plate 45 is further recessed, as seen at 56, and in this recess and on the inner surface of the guide 4 strip 53 is a spring pressed catch 51, the spring of which is shown at 58. The catch 51 has a pin 59 operating in a slot 50 in the strip 53. The lower end of the catch 51 has a rounded surface 6|, note Fig. 1, adapted to extend into the channel 50 so that when the lowermost pin 25 drops into the channel 50', the catch 51 will retain the pin against displacement in the channel, whereas the finger 36 can feed the lowermost pin 25 beneath the catch 51 for delivery into the channel 50", the catch 51 being raised in this operation against the tension of the spring 58.

Considering now Figs. 6 to 10 inclusive, wherein a diagrammatic illustration is shown of the members l5 and IS, in Fig. 6, the position of the parts here diagrammatically illustrated may be regarded as the step of beginning to open the dies after 'a casting has been formed on the pin 25' with the pin still Supported on the table or platform 31 in the channel 50", and the finger 36 still holding the lowermost pin 25" in the channel 50.

In Fig. '7, the members [5 and it are shown in their fully opened position where the table or shelf 31 has cleared the channel 55", allowing the pin 25 to drop in the channel 55" upon the shelf or platform 40 and also allowing the lowermost pin 25" to drop upon the shelf or platform 5| and in the channel 53', being held in the channel 50 by the spring catch 51. 7

Considering Fig. 8, in this figure, the dies a-r shown in a partially closed position, the finger 35 having delivered the pin 25" in position to drop in the channel 50" and onto the table or shelf 31 and with the pin 25 still retained upon the shelf or table in the channel 55''.

In Fig. 9, the members l5 and I6 including the dies thereon are in their fully closed position, in which position a cast head is formed on the pin 25" and the casting of the pin 25' is trimmed by the trimming tools 32.

Now turning to Fig. 10, here the members l5 and 16 are in a partially opened position, the member l6 having been retracted sufficiently to allow the trimmed pin 25 to drop through the lower end of the channel 50" into a suitable receptacle, not shown, with the table or platform 31 still supporting the pin 25" at the casting station.

The members l5 and. I6 then return to the position in Fig. 6, in which position the member It has moved inwardly sufficiently to again have the table or shelf 40 overlap the channel 50", leaving the pin 25" still supported at the casting station, similar to the showing of the pin 25' as in Fig. 6. This cycle of operation continues and in each cycle, a trimmed casting is delivered from the machine, a casting is formed on a pin at the casting station and a new pin is delivered at the delivery station. If the members l5 and [B are actuated toward and from each other, at the rate of three hundred and fifty or more operations per minute, then it will be apparent that three hundred and fifty or more castings will be formed by the machine:

In accordance with the method disclosed, four distinct functions and operations are performed in each cycle of machine operation, namely, delivery, casting, trimming and ejecting. In this method of procedure, three distinct table or supporting platforms are employed at the first three stations, namely for the pick-up and delivery of the pin or workpiece, at the casting station and at the trimming station. All these operations are performed in a simple mechanical and foolproof manner, particularly in the inclusion of the spring catch for retaining the pins against accidental delivery from the lower discharge end of the hopper or from the horizontal channel 50' to the vertical channel 50".

It will be apparent from the foregoing that the iscussed and op a i g members 15 nd 8- eregiven a d stin t moveme toward and. rom.

Considering Fig. 3 of the drawing, it will ap pear that the

plates

44 and 45 have large recesses 44' and 4,5 in which the heads 26 of the pins 25 pass to provide free travel of the heads in these recesses. The narrow plate 48 engages a part only of the head, as will clearly appear in said figure.

It will also be understood that in mentioning the rate of die operation in forming castings, this rate may vary, depending upon the type and kind of casting material employed, particularly in comparing metallic castings with respect, to plastic castings as the rate of plastic castings is usually somewhat less than that of forming metallic castings.

Having fully described the invention what is claimed as new and desired to be secured is:

1. In machines for forming die cast heads on pin members, a magazine for supporting pin members in stacked relation one upon the other, means on the magazine for guiding the pin members to predetermined position at the lower discharge end of said magazine, means forming a vertical channel in spaced relation to and below said magazine, with a horizontal channel placing the discharge end of the magazine stack in communication with the upper end of said vertical channel, a pair of die operating members having a pair of dies supported therein, said die operating members being movable toward and from each other to move the dies to closed and opened positions, said dies collectively forming a cavity in predetermined alinement with one end of alined pin members in said stack, one die operating member having a finger to pick-up the lowermost pin member of the stack in order to deliver the same through said horizontal channel to the upper end of said vertical channel during closing movement of said member, said member having below and in spaced relation to said finger a platform, movable across the vertical channel to catch the pin member delivered to said vertical channel and support the same in horizontal alinement with the die cavity, with the dies in open position, the other die operating member having a platform spaced with respect to the platform of the first member and movable across said vertical channel when the platform of the first member clears the vertical channel to allow the pin member to drop from a die alining position to a trimming station, and trimming tools at the trimming station for trimming the casting on the pin member during closing movement of said dies.

2. In machines for forming die cast heads on pin members, a magazine for supporting pin members in stacked relation one upon the other, means on the magazine for guiding the pin members to predetermined position at the lower discharge end of said magazine, means forming a ert cal-chennelrin spaced-rela ion to and below sa d. m gazine with a, horizonta channe placing th di harge end of the maga ne t ck, n communication with th upper; end o sa v rtical channel, apair of die operating members having a pair of dies supported therein, said die operating members, being movable toward, and from each other move the dies to closed and opened positions, aid dies collectively forming a, cavity in predetermined alinement with one end of alined pin members, in. said; stack, one die operating member having afinger to pick-up the lowermost pin, member of the stack in, order:

to deliver the samathroughsaid horizontal, channel to the, upper end ofsaid vertical channel durns; closing; mo ementofsaid m mber, aid memb r, havingbelow and inspaced relation to said fing r a. platformtmovable transversely f the vertical channel to catch, th p n member delivered to said vertical channel andsupport the same in horizontal alinement withthe. die cavity, with the dies in open position, the other die operating member having a platform spaced with respect to the platfporm of the first member and movable transversely of said vertical channel when the, platform of the first memberclears the vertical channel to allQW the. pinmember to drop from a die alining position to a trimming station, trimming tools at the trimming station for trimming the casting on the pin member during closing movement of said dies, and a spring actuated catch adapted to check accidental movement of the pin members in said horizontal channel.

3. In machines for forming die cast heads on pin members, a magazine for supporting pin members in stacked relation one upon the other, means on the magazine for guiding the pin members to predetermined position at the lower discharge end of said magazine, means forming a vertical channel in spaced relation and below said magazine, with a horizontal channel placing the discharge end of the magazine stack in communication with the upper end of said vertical channel, a pair of die operating members having a pair of dies supported therein, said die operating members being movable toward and Irom each other to move the dies to closed and opened positions, said dies collectively forming a cavity in predetermined alinement with one end of alined pin members in said stack, one die operating member having a finger to pick-up the lowermost pin member of the stack to deliver the same through said horizontal channel to the upper end of said vertical channel upon closing movement of said member, said member having below and in spaced relation to said linger a platform movable transversely of the vertical channel to catch the pm delivered to said vertical channel and support the same in horizontal alinement with the die cavity, with the dies in open position, the other die operating member having a platform spaced with respect to the platform of the first member and movable transversely of said vertical channel when the platform of the first member clears the vertical channel to allow the pin member to drop from a die alining position to a trimming station, trimming tools at the trimming station for trimmng the casting on the pin member upon closing movement of said dies, a spring actuated catch adapted to check accidental movement of the pin members in said horizontal channel, said horizontal channel being formed by spaced guide plates maintained in fixed position with respect season to said relatively movable die operating Enembers, and the delivery finger of said first named die operating member supporting the pin members in the stack until the first named die operating member has moved into a fully opened position. a

4. In machines for die casting bodies on pin members, means forming a pin delivery station, a casting station and a trimming station, means comprising a magazine for delivering pin membars in horizontal position to the delivery station, a channel between the delivery andcasting stations for passing the pins by gravity directly and without interruption into the casting station, means for transferring pin members one at a time from the delivery station to said channel,

means for supporting the pin members at the casting station, means for casting a die cast body on a pin member supported at the casting station, means for supporting a pin member with a cast body thereon at the trimming station, and trimming tools at said trimming station for trimming the cast body.

5. In machines for die casting bodies on pin members, means forming a pin delivery station, a casting station and a trimming station, means comprising a magazine for delivering pin members in horizontal position to the delivery station, means for yieldably restraining the pin members at the delivery station, a pair of dies forming when in closed position a cavity around a pin member supported at the casting station, means for injecting casting material into the cavity to form a cast body on that part of the pin member disposed in said cavity, means movable with, and secured to, said dies for moving the pin members one at a time from the delivery station. to the casting and trimming stations and for REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,720,611 Smith July 9, 1929 2,262,193 Morin et a1. Nov. 1'1, 1941 2,266,432 Morin et a1. Dec. 16, 1941