US1995628A - Glassware forming machine - Google Patents

Description

March 26, 1935. c. w. SCHREIBER El AL 9 5 GLASSWARE FQRMING MACHINE Filed May 21, 1932 5 Sheets-Sheet 1 March 26, 1935.. c w SCHRElBER ET AL 1,995,625.;

GLASSWARE FORMING MACHINE Filed May 21, 1952 3 Sheets-Sheet 2 c. w. SCHREIBER El AL 1,995,628

, 1932 5 Sheets-Sheet 3 Filed May 21 x L I 2 E M 4 w 7 M 5 4 w z e 7 M2 0 7 ww m 4 d P W U w w 5 2 2 m 4. fl 5 Q i 4 3 W Z 7 I M r Patented Mar. 26, 1935 1,995,628

UNITED STATES PATENT OFFICE 1,995,628 7 GLASSWARE FORMING momma Carl w. Schreiber and John 1:. McLaughlin, Alton, 111., assignors to Owens-Illinois Glass Company, a corporation of Ohio Application May 21, 1932, Serial No. 612,724

3 Claims. 49-5) The present invention relates to improvements machine such for example as shown in LaFrance in glassware forming machines and more par- Patent 1,348,365, dated August 3, 1920, to which ticularly to means for temporarily closing the reference may be made for details of construccharging opening of a suction type blank mold tion of the machine. Each cup is suitably mount- 0 following the usual charge severing operation. ed for movement radially of the machine between 5 An object of the invention is the provision of operative and inoperative positions and is so supmold closing cups individual to the blank molds ported upon a carrier that it is free for limited on a glassware forming machine, said cups being floating movement whereby accurate alignment movable into operative and inoperative positions and sealing contact between the cup and mold in independently of the charge severing means. will be assured.

Another object is the provision of a self align- The machine with which the present invention ing cup of the above character which floats in its is illustrated comprises a series of mold groups support or carrier and may because of this floatmounted upon individual frames 16 or arms ing feature, effectively close and seal the chargwhich together make up a mold carriage mounted 1.) ing opening of the corresponding blank mold. for continuous rotation about the vertical axis of 15 A further object is the provision of means acentral column 17. Movement of the mold car whereby a mold closing cup of the above charriage brings the mold groups 15 successively to actor can be adjusted to operate at various elea charging position where the blank molds 18 vations as required by blank molds of difierent gather mold charges from a supply body 19 0f 20 lengths. molten glass contained in' a revolving pot 20 or 20 Other objects will be in part apparent and in other receptacle. Each mold group 15 includes part pointed out hereinafter. in addition to the blank mold 18, a neck mold 21 In the drawings: which is arranged on the lower side of a head Fig. 1 is a sectional elevational view illustratcasting 22. This head casting and the blank and 25 ing one embodiment of the present invention neck molds together with a plunger 23, plunger 25 mounted upon one mold group of a suction type operating mechanism 24, and an air pressure glassware forming machine. control valve 25, are adapted for up and down Fig. 2 is a plan View of the invention. movement relative to the mold carriage 16, such Fig. 3 is a detail side elevational view thereof. movement being efiected by mechanism including Fig. 4 is a sectional elevational view showing in a bell crank lever 26 and cam mechanism 27 asso- 30 detail a control valve. ciated therewith. The bell crank lever provides Fig. 5 is a view showing the position of the connection between the cam mechanism and a cup lifting cam relative to the forming machine dipping frame 28 upon which the molds and other and revolving pot. elements directly associated therewith are Fig. 6 is a sectional view taken along the line mounted. A counter weight 29 and coil spring 35 VIVI of Fig. 2. 30 associated therewith and arranged with the Fig. '7 is a transverse sectional view taken central column 17, are connected through a lever along the line VIIVII of Fig. 3. 31 to saiddipping frame 28. The elfect of the Fig. 8 is a sectional view taken along the line counter weight and spring is to approximately Vl1IV1II of Fig. 3.

counter-balance the weight of the frame 28 and Fig. 9 is a sectional view taken along the line elements supported thereon. IX 0f The blank mold 18 which consists of two see- 10 is detfail sectional View Showing the tions is adapted to be operated by means includcup and cup carrier or support construction.

. ing a piston motor 32, said motor driving a rack .11 1S mew P W slmflar to 33 which is connected through suitable mecha- 45 Showing the mlsed Into engagement wlth nism to the mold sections. The neck mold 21 g? g g 2323 25 5213 plan View showing may be alternately opened and closed by an air means for adjusting the cup laterally? on its motor 34 operating through suitable mechanism.

carrier. Below the blank forming unit there is provided 50 Fig. 13 is a sectional view taken along the line finishing mold 35 mounted upon a Suitable XIII-QUE of Fig. 12. rier 36 which is adapted to be moved up and down In more or less general terms the present inperiodically- Details of construction which are vention consists of mold closing cups individual not fully Set forth herein and in fact do not 66 to the blank molds of a suction type forming stitute a part of the present invention may be --'tions in the lengths of the blank molds.

more fully understood by reference to the La- France patent above identified.

Each blank mold 18 as it is brought over the receptacle 20 is lowered into contact with the supply body 19 of molten glass and a charge of glass is drawn into the mold through the charging opening at the lower end, filling both the blank and neck mold cavities. The mold is then lifted away from the supply body of glass and a knife 37 is operated to separate the gathered mold charge from said supply body. Following this charge severing operation it is customary and has been found essential to the production of quality glassware to compact the glass making up the mold charge, through the application of air under pressure to the upper end of the mold charge by way of the valve 25. In this connection it will be understood that the plunger 23 is first withdrawn by means of its operating mechanism 24 and the valve 25 positioned over the passageway in the head casting 22 through which the plunger has been withdrawn. Application of air under pressure to the upper end of the gathered mold charge materially increases the density of the gathered glass forming a comparatively solid blank and in addition tends to cause extrusion of the glass through the charging opening at the lower end of the blank mold. Ordinarily, a flat bafiie plate or cup-like closure forming an integral part of the cut-oif unit is positioned over this charging opening in advance of this compression below to prevent such extrusion'of the glass and smooth or iron out the roughened portions created by the cut-off knife.

According to the present invention there is provided a closure cup which in a sense floats so that it is capable of multi-directional movement and as a result will, at every operation, be brought into proper engagement with the charging end of the mold. Thus effective sealing contact between the closure cup and mold may be obtained even though they are not accurately aligned prior to their being brought together. The specific construction may be substantially as follows: A closure cup 40 is suitably supported at the outer end of a horizontal carrier 41 which is adapted to be reciprocated horizontally by a piston motor 42. The entire unit including the cup carrier and piston motor (Figs. 1 and 2) may be fixed to a frame 43 which is mounted upon a vertical slide 44. This slide is attached to one of the frames 16. By means of a hand wheel 45, shaft 46, meshing bevel gears 47, and a vertical shaft 48 which is threaded through one of the bevel gears and connected to the frame 43, said frame and the elements supported thereon including the closure cup 40, may be adjusted vertically to compensate for varia- Details of construction of this feature may be more fully determined by reference to the LaFrance patent referred to above.

The closure cup 40 is of circular form and includes a continuous upstanding wall 50 having a channel 51 in its flat upper surface adapted for sealing contact with the lower end of the blank mold 18. The side walls of the cup taper downwardly forming an inclined bearing surface designed for engagement with bearings 52, said bearings being arranged in an annular series within a receiver 53. Sufiicient clearance is provided beneath and around the cup 40 to permit multi-directional movement thereof relative to the receiver 53 in the event such movement is essential to proper alignment of the cup and corresponding blank mold. The receiver 53 forms part of a cup holder 54 which is attached to one end of the carrier 41. A depending sleeve 55 on the lower side of the receiver 53 telescopes within a sleeve 56. These sleeves are slidingly connected together by a pin 57 and normally held in their maximum extended positions by means of a coil spring 58 which encircles said pin 57. -These sleeves are mounted for vertical movement in a guide 59 in which the outer sleeve 56 is keyed to prevent rotation thereof. A cam roll 60 at the lower end of the outer sleeve 56 is adapted for periodic engagement with the upper side of a stationary cam 61 (Figs. 5 and 11) It will be observed that this cam 61 is so positioned that it moves the cup upwardly into engagement with the corresponding blank mold very shortly after the charging operation. An arm 62 upon the outer end of which the guide 59 is formed is secured by bolts 63 or the like to the carrier 41.

This carrier 41 by means of which the closure cup is alternately projected and retracted to and from an operative position beneath the blank mold, includes an inverted channel iron bar 64 riding and guided between pairs of vertically spaced anti-friction rollers 65. The upper rollers 65 are journaled on shafts 66 which in turn are supported in bearings 67 forming a part of the frame 43'. The lower rollers 65 are carried by shafts 68 supported in bearings 69 on the upper.

side of a cylinder 70 of the piston motor 42.

This piston motor 42 which reciprocates the carrier 41 and therewith the cup 40, includes the horizontal cylinder 70, a piston 71 therein, and a piston rod 72 attached to said piston 71 and extending through the outer end of the cylinder where it is suitably connected to the holder 54. Cushioning devices 73 of well known conventional form are provided at the opposite ends of the cylinder 70 for obvious reasons. A pair of air pressure supply pipes 74 connected to the opposite ends of the motor cylinder 70 lead to a control valve 75 (Figs. 1 and 4) which is connected to a main supply pipe 76. This control valve 75 includes a cylinder 77 to the center of which the supply pipe 76 is connected and to the opposite end portion of which the branch pipes 74 are connected. A slide valve 78 in the form of a piston, is arranged within the cylinder 77 and adapted due to periodic movement thereof to pro vide communication between the supply pipe 76 and the branch pipes 74 one at a time. This valve 78 is connected by means of a push rod 79 to a cam roll 80 which runs in a stationary continuous cam 81. This cam 81 operates the valve 78 in timed relation with movements of the machine. An exhaust passageway 82 in the valve 78 and rod 79 is adapted 'for register with the branch pipes 74 one at a time so that air pressure will be released from one end of the piston motor 42 while pressure is being built up at the other end thereof.

From the above it is apparent that in operation the blank molds are brought successively to a position over the receptacle 20 and there lowered into contact with the supply body of glass. A mold charge is gathered by suction and the blank mold lifted away from the glass. Thereupon the cut-off knife 37 is operated to sever the gathered mold charge from the supply body. This knife is then withdrawn from beneath the mold and immediately thereafter the valve 78 is moved to the outer end of the cylinder 77 so that air under pressure is admitted to the inner end of the piston motor 42. In this manner the carrier 41 is projected sufliciently to bring the closure cup 40 into substantial if not accurate, alignment with the corresponding blank mold. Movement of the mold carriage about the central column 17 brings the cam roll 60 at the lower end of the cup holder 54 into engagement with the upper side of the stationary cam 61. This results in upward movement of the receiver 53 and closure cup 40 a sufiicient distance to effect sealing contact between said cup and the lower end of the blank mold. By the time this relative positioning of the parts has been eifected, the plunger 23 will have been withdrawn and the air pressure valve placed over the opening through which'the plunger enters the neck and blank molds. A puff of air under pressure is then introduced into the upper end of the blank mold resulting in compacting of the gathered mold charge against. the walls of the blank mold and said closure cup 40. As a result of this operation the density of the blank is greatly increased and the lower end of the charge which has been chilled and somewhat scarred by the cut-off knife, is to a very large degree reheated. Thus the scar is almost entirely eliminated. Exceptionally uniform distribution of glass and a very appreciable improvement in the bottom formation of the finished articles of glassware result from following the above practice.

In Figs. 12 and 13 we have illustrated a novel means providing for adjustment of the cup holder 54 horizontally relative to the carrier 41. In this construction the arm 62 is pivoted by means of a vertical hinge pin 84 to an inverted channel iron bar 85. A pair of lock bolts 86 extending through slots 8'7 in said channel iron bar 85 slidingly support said arm in contact with the lower side thereof. A pair of adjusting screws 88 are threaded into the side flanges of the channel iron bar 85 for engagement with the opposite vertical surfaces of the arm 62 on the holder 54. By loosening the two lock bolts 86, the holder will be free for adjustment which is obtained merely by operating the adjusting screw 88. Because of the possibility of adjusting the holder as just brought out, it is evident that comparatively accurate alignment of the cup and corresponding mold may be obtained without necessitating any relative movement between said cup and the receiver 53.

Modifications may be resorted to within the spirit and scope of the appended claims.

What we claim is:

1.- In a glassware forming machine, the combination with a traveling frame of a suction blank mold having a downwardly facing charging opening, means for gathering a charge of molten glass from a receptacle into said mold, a charge severing device, means for temporarily closing the charging opening, said closing means including a horizontal carrier, means for reciprocating the carrier horizontally, an upwardly facing closure cup, a cup holder mounted at one end of the carrier, means whereby the cup holder may be adjusted about a vertical axis relative to the carrier,

means for imparting vertical movement to the.

sleeve, and a cam rollat the end of the sleeve opposite the cup.

2. In a glassware forming machine, the combination with a traveling frame of a suction blank mold having a downwardly facing charging opening, means for transferring a charge of molten glass from a receptacle into said mold, a charge severing device, means for temporarily closing the charging opening including an upwardly facing cup, a cup holder in which said cup is removably mounted, a pair of depending telescopic sleeves on the lower side of said cup holder,

spring means tending to move the sleeves apart.

axially, a cam roll at the lower end of said sleeves, a vertical guide in which said sleeves are splined and axially reciprocable, means for bringing the cup, sleeves, and guide into register with the mold charging opening, and a cam positioned to engage said roller and effect yielding engagement between the cup and mold.

3. In a glassware forming machine, the combination with a traveling frame of a suction blank mold having a downwardly facing charging opening, means for transferring a charge of molten glass from a receptacle into said mold, a charge severing device, means for temporarily closing the charging opening including an upwardly facing cup, a cup holder in which said cup is removably mounted, a pair of depending telescopic sleeves on the lower side of said cup holder, spring means tending to move the sleeves apart axially, a cam roll at the lower end of said sleeve, a vertical guide in which said sleeves are splined and axially reciprocable, a horizontal carrier supporting the guide at one end, a piston motor operatively connected to the carrier for reciprocating the latter and periodically placing the cup in register with the mold charging opening, and a cam positioned to engage the roller and move the cup upwardly into engagement with the mold.

CARL W. SCI-IREIBER.

JOHN E. MCLAU'GHLIN.

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