US2365929A

US2365929A - Machine for blowing hollow glassware

Info

Publication number: US2365929A
Application number: US456354A
Authority: US
Inventors: Russell G Allen; Charles B Smith
Original assignee: Owens Illinois Glass Co
Current assignee: OI Glass Inc
Priority date: 1942-08-27
Filing date: 1942-08-27
Publication date: 1944-12-26
Anticipated expiration: 1961-12-26

Description

G. ALLEN ET AL MACHINE FOR BLOWING HOLLOW GLASSWARE Filed Aug 27, 1942 4 Sheets-Sheet' 1 Dec. 26, v R G, ALLEN ET AL MACHINE F( JR BLOWING HOLLOW GLASSWARE Filed Aug.-27, 1942 '4 Sheets-Sheet 2 Dec. 26;, 1944. R. s. ALLEN ET AL 'MACHINE FOR BLOWING HOLLOW GLASSWARE Filed Aug. 27, 1942 4 Sheets-Sheet 3 Smilh Dec. 26, 19. R. G. ALLEN ET AL I 2,365,929

MACHINE FOR BLOWING HOLLOW GLASSWARE Filed Aug. 27,' 1942 4 Sheets-Sheet 4 pool of molten glass.

Patented Dec. 26, 1944 UNITED MACHINE FOR BLOWING HOLLOW GLASSWARE Russell G. Allen and Charles B. Smith, Alton, 1u., assignors to Owens-Illinois Glass Company, a

corporation of Ohio Application August 27, 1942, Serial No. 456,354 '3 Claims. (01. 49-5) Our invention relates to machines for forming hollow glass articles such as bottles and Jars, and particularly to certain improvements on an Owens type suction gathering machine.

In machines of this type, suction gathering molds are carried on dip heads mounted on .a horizontally rotating carriage by which the dip frames are brought in succession over a tank or Each dip head in .tum is lowered to dip the mold in the pool and charges of glass are drawn by suction into the mold cavities. Associated with each mo-ldis a vertical plunger having a tip or neck pin which when the plunger is lowered, enters the neck mold and in cooperation therewith forms the neck portion of the article which is later blown to final form within a finishing mold,

An object of the present invention is to provide improved means for lifting and lowering the plungers and for reliably holding them in their lowered position.

A further object of the invention is to provide plunger operating means.

Other objects of the invention will appear hereinafter.

Referring to the accompanying drawings:

Fig. 1 is a part-sectional side elevation of a head or section of the machine, the plane of the section being substantially radial to the axis of rotation of the mold carriage.

Fig. 2 is a sectional elevation of the same on a larger'scale, the section being taken in a vertical plane through a suction gathering mold, the plunger and mold being in their lowered position for gathering charges of glass.

Fig. 3 is a sectional detail at the line 3-3 on Fig. 2. i

Fig. 41s a view similar to Fig. 2 but showing the dip frame lifted and the plunger withdrawn.

Fig. 5 is a section 'atthe line 55 on Fig. 4, showing means for adjusting the dip head up and down.

Fig. 6 is a top plan view of a dip head andassociated parts.-

Fig. 'l is a front elevation of the same.

Fig. 8 is a front elevation of the slide valve and its operating lever.

The machine as herein illustrated embodies certain improvements on an Owens type suction machine such as shown for example in the patent to Soubier, 2,113,551, April 5, 1938, or the patent to La France, 1,185,687, granted June 6, 1916, referred to therein, and to which patents reference may be had for a detailed description of this type of machine.

The machine as herein shown comprises a mold carriage l0 which is rotated continuously about the verticalaxis of a stationary center column I i (Fig. 1). Mounted on the carriage are heads or units each comprising a mold group and cooperating mechanism for gathering charges of glass and shaping them in the molds. Each mold group includes a sectional blank mold l2 and a sectional neck mold 13 above and in register with the blank mold, the blank and neck molds together forming a parison mold. The mold sections are carried on arms mounted to swing on a pivot pin ll for opening and closing the molds. The molds with their operating mechanism are carried on a dip head comprising a frame l5' which is mounted for up-and-down movement on the carriage.

The means for lifting and lowering the dip heads includes a stationary cam track I6 (Fig. 1) mounted on a cam plate or spider l1 carried on the column II. A cam follower roll it running on the cam track, is carried on a slide l9 which reciprocates radially of the machine in slideways 20 and is connected through an extensible link 2| to one arm of a bell crank 22. The other arm of the bell crank is connected through a link 23 to the upperend of a vertical shaft 24 which is connected to the dip frame.

The cam l6 operates through the connections just described to lower the dip frame periodically and bring the molds i2 into dip as shown in Fig. 2 for gathering charges of molten glass from the pool in the tank 25. The dip frame is adjustable up and down for accommodating molds of different lengthsand for adjusting the molds according to the level of the glass in the tank. For this purpose the shaft 24 is screw threaded and has a worm gear 26 threaded thereon. This gear is rotated by means of a hand wheel 21 (Fig. 5) on a shaft 28 which is journaled in the dip frame and has driving connection through a pair of gears 29 with a worm shaft 30 carrying a worm running in mesh with the gear 26. g The latter is held against up-and-down movement relative to the dip frame so that rotation by the hand wheel serves to adjust the dip frame up and down.

The parlson mold as herein shown is a double cavity mold. Neck pins or plungers 3| carried on a yoke or plate 32, are projected through a suction and blowing chamber 35 and the neck mold into the blank mold cavities, and held in such position during the gathering of the charges of glass. The plungers are lifted and lowered by means of a vertical plunger rod 33 which is.

operated by the novel mechanism presently to be described. While the mold and plunger are in lowered position the air is exhausted from the mold cavities by suction applied through a vacuum pipe 34 (Fig. 1) which opens into the chamber 35, the latter communicating with the mold cavities.

After the charges of glass are thus gathered, the mold is lifted and the blanks of glass therein severed from the glass in the pool in the usual manner by a knife 36 (Fig. 7) carried on rock shaft 31. The plungers 3| are then withdrawn from the mold.

The means for lifting and lowering the plungers includes a cam follower roll 38 carried on a slide 39 which reciprocates in guideways 40 extending radially of the mold carriage. The roll 38 runs on a stationary cam track 4| (Fig. l). The slide 39 is connected by a pivot 42 to one end of a horizontally disposed driving rod or shaft 43. This drive shaft comprises a rack bar 44 which as shown in Fig. 3 is rectangular in cross-section and slidably mounted in a hanger 45 suspended from a shaft 46 Journaled in the dip frame. The rack bar is formed with rack teeth 41 for driving a gear pinion 48 on the shaft 46. The rack bar has a bore extending lengthwise therethrough. A tubular shaft 49 attached to the inner end of the rack bar and forming an extension thereof, telescopes with a rod 50 which forms the inner section of the driver 43. A stem connectedto the section 50 and extending lengthwise through the rack bar, has mounted thereon a coil sprin 52 held under compression between the section 50 and the outer end of the rack bar.

The pinion 48 runs in mesh with a segmental gear 53 fixed on a shaft 54 mounted in the dip frame. A second segmental gear 55 also mounted on the shaft 54 has a fixed connection with the gear 53, as by means of pins 56. The gear 55 runs in mesh with a rack 51 formed on the plunger rod 33.

' The cam 4| operates through the gearing Just described to lift and lower the plungers. The arrangement of the gearing is such that a substantially uniform force may be applied throughout the lifting and lowering movements and adequate pressure may be maintained on the plunger while in its lowered position for securely holding the plunger tips in place-within the molds. The coil compression spring 52 serves as a safety means permitting the cam roll and slide 38, 39 to go through their cycle of movements independently of the plunger when on account of some obstruction or through some other cause, an ab-'- normal resistance to the plunger movement is encountered. The construction and arrangement of the driver 44 provide for the use of a long spring 52 permitting the slide 33 to operate through its full range of movement without any great increase in the resistance offered by the spring, when the movement of the plunger is obstructed, thus preventing excessive strain being placed on the mechanism.

Cooperating with the plungers is a slide valve 60 connected by a link 6| to the lower end of a lever arm 62 and slidable over the chamber 35 when the plungers are withdrawn. Air under pressure is supplied through this slide valve in the usual manner for blowing the parisons within the mold.

The lever for moving the slide-valve comprises the lever arm or section 62 and an upper arm or section 53 both fulcrumed on a pivot pin 84 on the dip frame. The section 52 is in the form of an open frame and provides an opening through which the rack bar 44 extends. The upper section 62 is in the form of a yoke which straddles the segmental gears. A pivot pin connecting the outer ends of the yoke arms, extends through a cam slot 68 in the gear 55 and carries the cam follower roll 65 which runs on the cam track 66. A pair of coil springs 61 are held under compression between lugs 68 on the lever sections 82, 53 and yieldingly hold the sections in their normally operative position but permit the upper section 63 to be swung by its cam independently of the lower section when movement of the latter is prevented by some obstruction.

Modifications may be resorted to within the spirit and scope of our invention.

We claim:

1. The combination of a rotatable mold carriage, a dip frame mounted for up-and-down movement thereon, a mold on said frame, a plunger positioned over the mold and adapted to be projected into the mold, a vertical plunger rod carrying the plunger, a stationary cam, a cam follower roll running on the cam, a slide carrying said roll, a driver pivoted to said slide and comprising a horizontally disposed rack bar, a pinion positioned over and running in mesh with said rack bar, a shaft Journalled in the dip frame and on which said pinion is mounted, a hanger suspended from and carried by said shaft and providing a bearing in which the rack bar is slidably mounted and held in mesh with said pinion, and gearing interposed between said pinion and the plunger rod and providing a driving connection between said pinion and rod.

2. The combination of a mold carriage rotatable about a vertical axis, a dip frame mounted for up-and-down movement on the carriage, a mold supported on the dip frame, a plunger positioned over the mold and adapted to be projected into the mold, a vertical plunger rod carrying the plunger, a vertical rack on said rod, a stationary cam, a cam follower roll running on the-cam, a slide carrying said roll and mounted on the car- 'riage, a driver pivoted to said slide and comprising a substantially horizontal rack bar extending radially of the mold carriage, and speed multiplying gearing providing a driving connection between the said driver and said vertical rack and comprising a pinion directly over and running in mesh with the horizontal rack bar, gear segments arranged side by side and connected to rotate about a common axis including a segment running in mesh with said pinion and a segment of greater radius overlapping said pinion and running in mesh with the rack on the plunger rod.

3. The combination of a mold carriage rotatable about a vertical axis, a dip frame mounted for up-and-down movement on the carriage, a mold supported on the dip frame, a plunger positioned over the mold and adapted to be projected into the mold, a vertical lplunger rod carrying the plunger, a vertical rack on said rod, a stationary cam, a cam follower roll running on the cam, a slide carrying said roll and mounted on the carriage, a driver pivoted to said slide and comprising a substantially horizontal rack bar extending radially of the mold carriage, and speed multiplying gearing providing a driving connection between the said driver and said vertical rack and comprising a pinion directly over and running in mesh with the horizontal rack bar, gear segments arranged side by side and connected to rotate about a common axis including a segment running in mesh with said pinion and a segment of greater radius overlapping said pinion and runmug in mesh with the rack on the plunger rod. a shaft journalied in the dip frame and on which said pinion i mounted, and a hanger suspended from and carried by said shaft, said hanger being formed with 'a bearing in which said driver is slidably mounted and supported for up-and-down swinging movement as the dip frame move up and down.

RUSSELL G. ALLEN. CHARLES B. SMITH.