US2038518A - Parison transfer mechanism - Google Patents

Description

Apri lZS, 1936. c. BADGER ETAL PARISON TRANSFER MECHANISM Filed June 8, 1953 5 Sheets-Sheet 1 gmmms A ril 28, 1936. ADGER HA 2,038,518

PARI SON TRANSFER MECHANI SM Filed June 8, 1955 5 Sheets-Sheet 2 April 28, 1936. AD ER Er- AL 2,038,518

PARISON TRANSFER MECHANISM I Filed June 8, 1955 s Sheets-Sheet s April 2s, 1.936. BADGER ETAL 2,038,518

PARISON TRANSFER MECHANISM I Filed June 8, 1933 5 Sheets-Sheet 4 A ril 28,1936. c. BADGER ETAL PARI-SON TRANSFER MECHANISM Filed June 8, 1953 5 Sheets-Sheet 5 meme Apr. 28, 1936 from the blank molds to the finishing molds UNITED STATES,

PATENT OFFICE 2,038,518 PARISON TRANSFER IWECHANISM Charles Badger and Clyde 0. Cook, Columbus,

Ohio, assignors to Owens-Illinois Glass Company, a corporation of Ohio Application June 8, 1933,'Serial No. 674,874

4 Claims. (01. 214 1) Our invention relates to glass molding machines of the .type in which parisons of glass are given an initial'formation in blank or parison molds and then transferred to finishing molds in which they are blown to their finished form, such machines being used for making bottles, jars and other glassware. The invention relates particularly to apparatus for transferring the parisons Such apparatus is shown in connection with and as forming part of a two table machine comprising rotary mold tables arranged side by side and car-.

rying, respectively, the blank molds and finishing molds. An object of the invention is to provide anism, the section being taken at the line VV on Fig. 4.

. Fig. 6 is a section at the line VI-V'I onFig. 4.

Fig. 7 is a view showing a pair of tongs in open position.

Fig. 8 is a view of the same with the tongs closed about a parison. I

Figs. '9 to 12 are views showingthe transfer mechanism at successive periods during the transfer operation. I

Fig. 13 is a view showing a valve and associated parts. I

Fig. 14 is a sectional view of the valve. .Fig. 15 is a section at the line XVXV on Fig. 14.

Figs. 16 to 18 illustrate a modification in which the transfer mechanism is driven by a pair of air motors.

Fig. 16 is a plan view showing the and parts operated thereby.

Fig. 17 is a section at the line XVII-XVII on Fig. 16.

Fig. 18 is an elevation of mechanism shown in Fi 16. f

Referring particularly to Fig. 1, we have shown a bottle forming machine of the press and blow a type.

ir motors This machine comprises a blank mold table 20 and a finishing mold table 2| arranged side by side for rotation about vertical axes. An annular series of blank molds 22 are mounted on the blank mold table and a corresponding series 5 of finishing molds 23 on the finishing mold table. Gears 24 and 25 are connected to the tables 20 and 2|, respectively, and are driven by a motor 2! operating through gearing including a pinion 26 intermeshing with the gears 24 and 25. The driving mechanism may operate as is usual to index or rotate the mold tables step by step. Each step rotation of the tables brings a blank mold and a finishing mold into parison transfer position, permitting a parison to be transferred from 5 the blank mold to the finishing mold.

The transfer mechanism, in general terms, comprises two parison gripping devices 30 each including a pair of gripping jaws for engaging a parison, vertical spindles 3i carrying the grip- 20 ping devices, a yoke 32 in which the spindles are mounted for individual movement up and down, air motors 33 individual to said spindles for moving them vertically and for operating the gripping jaws, a rock shaft 34 to which the yoke 32 25 is attached, and'means for oscillating the rock shaft and thereby carrying the gripping devices horizontally through an arc of 180 degrees. Each such movement of the gripping devices transfers a position over the corresponding finishing mold and at the same time transposes the position of the gripping devices.

The transfer mechanism is supported by a horizontal channel iron or bar 35 moimted on 35 vertical posts 36 and 31. The rock shaft 3% (see Fig. i) is journaled in a hollow post or bearing 7 sleeve as, the upper end of which is flanged and secured by bolts 39 tothe channel bar 35. The yoke 32 is connected by a key 40 to the lower end 40 of the rock shaft. Each spindle 3| comprises a hollow shaft 4! and a rod 42 extending therethrough and having a limited vertical movement therein, as hereinafter set forth. Each of the gripping devices 30 comprises a pair of arms 43 45 formed with gripping or supporting jaws M designed to support a parison 45, said jaws when brought together surrounding the parison and engaging beneath the usual neck portion 46 formed on the parison. The arms43 swing on a pivot pin 41 which extends through a spacingblock 48- having a screw threaded connection (Fig. 4) with the lower end of the rod 42. A head 50 secured to the lower end of the sleeve. is formed with a slot or 'guldeway 49 for the block 48. The head 50 has a slot and pin connections 5| with the arms 43. It will be seen that with this construction, downward movement of the head FIB-relative to the rod 42 and pivot pin 41 will cause outward swinging movement of the jaws and vice versa.

Each of the air motors 33 includes a cylinder 52, the upper end of which is formed with a fianged portion or head 53 which, as shown, is substantially circular, overlying the yoke 32 and thereby supporting the motor cylinder. The lower end of the cylinder is formed with a flanged portion or head 54. The tubular shaft 4| extends through holes in said heads 53 and 54. C011 springs 54 are mounted on bolts 54", the latter extending freely through the yoke 32 and screw threaded into the head 53. The springs are um I der tension and hold the cylinder head 53 firmly seated on the yoke 32. Within, the cylinder 52 is a piston 55. Above the piston and resting thereon is a plunger 56 which extends upward to and through the upper end of the cylinder. Keyedto the upper end of the plunger is a laterally extending arm 51. The upper end of the sleeve 4| has a screw threaded connection with the arm 51; Bearing blocks 5'| are bolted to thehead 53 on opposite sides of the arm 51, said blocks being seated in a shallow channel 51* in the upper face of the head 53. The plunger 56 is formed with fiat surfaces 56 against which the b1ock's5l bear as the plunger moves up and down. The rod 42 carries a disk 58 attached to the upper end thereof. Pins 59 secured to and extending upward from the head 53, provide stops which engage beneath theldisk 58and limit the downward movement, of the rod 42 relative to the shaft 4| when the latter is in its lowered position.

The operation of the air motor 33 is as follows: Assuming the parts to be in the position shown at the left hand of Fig. 4, the gripping jaws are open as shown in Fig. '7. The weight of the shaft 4 I, plunger 56 and connected parts holds the head 56 in its lowered position relative to the rod 42 which is at this time supported on the stop pins 59, so that the gripping jaws are held open (Fig. 7). If, now, air is admitted to the cylinder 52 beneath the piston 55, the latter moves upward, thereby lifting the plunger 56, shaft 4| and yoke 50, so that the yoke operates to swing the gripping jaws together as shown in Fig. 8. The initial upward movement of the piston -55 thus operates to close the gripping jaws about a parison. The continued upward movement of the piston carries the gripping device upward, the rod 42 and shaft 4| now ,moving upward as .a unit. When the supply of air is out ofi from the motor the air in the motor cylinder is permitted to escape through an adjustable bleeder valve 60, allowing the spindle 3| to move downward until the disk 56 engages the stop pins 69. The shaft 4| and yoke 50 continue their downward movement, thereby opening the gripping jaws, the parts being brought'to rest when they again reach the position shown in Fig. 4.

The mechanism for,rocking the rock shaft 34- and thereby oscillating the gripping jaws, is as follows: A vertical drive shaft 6| '(Figs. 1 and 2) is journaled at its lower end in.a stationary arm 62 fixed to the upper end of a standard 63. The upper end of the shaft is joumaled in a triangular bracket 64 attached to the angle bar 35. A pinion 65 fixed to the lower end of the shaft 6| runs in mesh with and is driven, by the gear 24.

. the usual manner.

tor I which operates, first, to close the jaws 36' arm 66' with a gear pinion 68 mounted on a stud shaft 69 fixed to the bar 35. The gear 68 meshes with a gear pinion I6 keyed to the upper end of the rock shaft 34. The gears 24 and 65 are so proportioned that each step rotation of the mold tables rotates the gear 65 and drive shaft 6| through an angle of 180 degrees. The length of the crank 66 is less than the radial distance between the shaft 69 and the wrist pin 1| by which the rod 61 is connected to the gear 66, so that the rotation of the drive shaft 6| imparts an oscillating movement to the gear 68. This movement transmitted through the gear pinion 10 to the rock shaft 34 rotates the latter through an angle of 180 degrees each time the mold tables are indexed.

The'air supply for operating the motors 33 is controlled by a valve 12 (Figs. 13 to 15) operated by or in synchronism with themovements of the mold carriages. Air under pressure is supplied through a pipe 86 connected to the valve casing 81 and communicates through a port 88 with a passageway 89 extending axially through the valve and communicating through ports 90 with pipes 9| and 92 which extend to the air motors 33. Rotation of the valve places the air pipe 86 alternately in communication with the air motors The operation of the transfer apparatus as a whole will be understood by reference to Figs.

" 9 to 11 which illustrate successive steps in a cycle of movements, and in which the two air motors 33 are designated I and II respectively. With the parts in the position shown in Fig. 9, both'of the gripping devices 30 are open, one being directly over a blank mold 22 at the transfer position. A parison 45 has been projected upward in Air is now supplied to the moabout the parison and then to move the spindle 3| upward, thereby lifting the parison to the position'shown 'in Fig. 10. The mold carriagesare now given a step rotation. This movement of the mold carriages operates through the drive shaft 6| to rotate the shaft 34 through an angle of degrees in the manner heretofore described, so that the motors I and II are transposed, this position of the parts being shown in Fig. 11. The air supply to the motor I is now cut off, allowing the spindle which carries the parison 45 to be lowered. The parison is thus projected downward into the finishing mold 23 directly thereb'eneath. The stop pins 59 arrest the rod 42 shortly before the motor piston has completed its downward movement so that the final downward movement of the shaft 4| operates in the manner heretofore described to separate the gripping jaws. This releases the parison so that it drops are now in position for the next succeeding'transfer operation. As the position of the two motors has been transposed, the motor II operates its gripping device for engaging the parison which is to be transferred during the next succeeding transfer operation.

Figs. 16 to 18 illustrate a modification in which the rock shaft 34 for oscillating the gripping devices is actuated by a pair of air motors '74 and 15. Pistons l6 reciprocate within the motor cylinders. Connecting rods are pivotally connected at their inner ends to the pistons and at their outer ends are connected by wrists 16 to a aoaasia gear wheel 19 which drives a gear pinion N on a'shaft 8 I The shaft 8| corresponds to the drive shaft 6| (Figs. Land 2). pistons 18 have driving connections through the rods 11 to the gear 19 on opposite sides of its axis so that when one piston is moved outwardthe other is drawn inward, thereby oscillating the gear 19. 'Said gear and the pinion 80 are so proportioned thateach oscillation rotates said pinion through' 180 degrees. motors l4 and I5 is supplied through pipes 83 and 84 under the control of a valve (not shown) which I gage and-lift an article, and'means for rotating may .be actuated in synchronism-with the movements of the mold tables.

Modifications may be resorted to within the spirit and scope of our invention. 1 I Whatweciaimis:

1. Transfer mechanism-comprising a vertically disposed rotatable shaft, a yoke carried by the shafteandrotatable therewith, vertical spindles" mounted for up and down movement on said:

yoke, article engaging devicescarried by said spindles, piston motors individual to said spindles, each said motor comprising a vertical cylinder and a piston, said motors being supported on and rotatable with said yoke and positioned laterally.

of their respective spindles, means operatively connecting the motor pistons to said spindles, means for actuating the motors and thereby individually lowering and lifting said spindles and causing .each said article engaging device to ensaid shaft and thereby transposing the'positions of the spindles, article engaging devices and pistonmotors, rotatively of the axis of said shaft.

2. Parison vertical shaft, means for rotating said shaft, a

vertical spindle carried by said shaft, an article gripping device carried by said spindle, a piston motor carried, by said shaft at one side of the spindle and. comprising a vertical cylinder and' piston, a plunger extending do'wnwardinto the motor cylinder and resting on said piston, an arm connecting the upper ends of the plunger and spindle, said motor being operable to lift and lower the spindle. and means controlled by thc It will be noted that the Air for operating the transfer mechanism comprising a movement of the spindle m actuating the gripsing means. i

3. The combination of a vertical shaft, means for periodically rotating it about a vertical axis,

a vertical spindle can-led by the shaft at one side of said axis, said spindle including a hollow shaft and a rod extending therethrough, a pair of gripping jaws pivotally connected to said rod,

said cylinder resting on the piston and project ing above the cylinder, an arm attached to the upper ends of the plunger and spindle, and means for causing said relative vertical movements of -'means providing a connection between said holthe hollow shaft and. rod for operating said jaws,

4. The combination of a vertical shaft, means i for periodically rotating it about a vertical axis,

a vertical spindle carried by the shaft at one side of said axis, said spindle including a hollow shaft and a rod extending therethrough, a pair of gripping jaws pivotally connected to said rod, means providing a connection between said hollow shaft and gripping jaws by which the jaws are opened said hollow shaft and rod, means for periodically lifting'and lowering the spindle in timed relation wto the rotative movements of said first. mentioned shaft, and means for causing said relative vertical movements of the hollow shaft and rod for operating said jaws. said means for lifting and lowering the spindle comprising a piston motor 7 carried by said first mentioned shaft and including a 'vertical'cylinder and ,a piston therein. a plunger movable up and down in the cylinder and an arm connecting the plunger and spindle.

' I CHARLES BADGER.

CLYDE C. COOK.

and closed by a relative vertical movement of the upper ends of the

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