US2175064A - Mold operating mechanism for glassware forming machines - Google Patents

Description

Oct. 3, 1939. F. ONEVILL 2,175,064

MOLD OPERATING MECHANISM FOR GLASSWARE FORMING MACHINES Original Filed Aug. so, 1935 2 Sheets-sheet 1 MIN l 1 I'd/0;": Wu"- 7/1771 am MW Patented Oct. 3, 1939 PATENT OFFICE MOLD OPERATING MECHANISM FOR GLASSWARE FORMING'MACHINES Frank ONeill, Miami Beach, Fla., assign0r to Hartford-Empire Company, Hartford, a corporation of Delaware Conn.,

Original application August 30, 1935, Serial No.

38,569. Divided and this application April 22, 1937, Serial No. 138,283

4 Claims.

a mold of such a machine and for securing that 7 mold in closed position under sufiicient pressure to oppose any pressure-applied internally thereof in forming glass therein. The present case is a division of my prior and copending application, Serial No. 38,569, filed August 30, 1935, and entitled Glassware forming machine now Patent No. 2,111,296 granted March 15, 1938.

' Among the objects of the present invention are to provide novel means for opening and closing either a blank or a finishing mold of a glassware forming machine in such manner that the mold to which my novel opening and closing means are applied may be securely held closed during the forming of glass therein.

-Further objects of the present invention will be in part apparent and in part pointed out hereinafter.

In the drawings: I 1 Figure 1 is a view principally in vertical section and with parts in elevation illustrating the application of my novel mold operating means to a rotary type glassware forming machine; and

Figs. 2, 3 and 4 are views principally in horizontal section on the line A-B of Fig. 1 illustrating difierent positions of the mold opening and closing means; Fig. 2 illustrating the mold closed and locked; Fig. 3, the mold closed but not locked; and Fig. 4, the mold open.

I contemplate that the mold operating means forming the subject matter of the present invention may be applied to many different types of glassware forming machines, .including those in which the molds are relatively stationary and also those in which the molds are moved as in rotary type machines, now in common use in the art, in which the molds are rotated about a ver tical axis. Further, my present invention may be applied to rotary machines either of the single or multiple table types, and also to such machines, whether the molds be rotated continuously or intermittently. I have, however, chosen for the purposes of the present case to illustrate my novel mold operating mechanism applied to a continuously rotating machine of the twotable type, such as that forming the subject matter of my parent application above referred to, the particular application of the invention here specifically operation of the blank molds of that machine.

It will be in part apparent and in part pointed out hereinafter, however, the manner in which illustrated and described being to the the invention may be applied to the blow molds of such a machine, or to blank or blow molds of other types of machines.

Referring to Fig. 1 of the present drawings, there is illustrateda portion of the blank mold 5 carrier of'a glassware forming machine comprising a blank mold table which is mounted for continuous rotation upon a central column 35. The rotatable portions of the blank mold table comprise a lower spider 36 an upper spider 31 10 and an intermediate spider'38, which are suitably connected together so that they may rotate as a unit about said central column. A ring gear 39 encircles and is integrally formed with the lower spider 36, said gear being operativel'y connected to drivingmechanism in a manner not illustrated in the present drawings, but disclosed fully in my parent application above referred to.

The machine includes a plurality of blank mold units 33 mounted upon the intermediate spider 38 in such fashion that they may be rotated in respect thereto in intermittent steps, each of an angle of and'thereby alternately inverted and reverted.

Each mold unitv 33 includes a partible body mold 40-connected by arms 4| to a hinge pin 42 and a partible neckmold 43; which is carried by a pair of arms 44, the latter being pivoted to the aforesaid hinge pin 42. This hinge pin 42, which forms a part of a turn-over unit, is permanently mounted on a head 45, which is connected to the outer end of a sleeve 46, the latter being journaled in a horizontal bearing 41, the axis of which extends. radially of the mold table in the machine illustrated in Fig. 1. A circular flange 48 extendingradi'ally outward from the outer end of the sleeve 46 in proximity to the inner end. of the head 45 carries an annular series of rollers 49, which are intended for engagement with notches 50 or recesses provided in the lower surface of'an arcuate plate 5|, said plate. being suitably secured to a cam carrier 52. This cam carrier is keyed to the central column 35, as will be "seen in Fig. l, and supports cams for controllingthe opening and closing of the blank and neck molds as well as devices for locking the turn-over units in either of their two operating positions.

The turn-over unit is adapted to be locked in either of its two operating positions by means including a pair of diametrically opposed notches 53 or recesses in the periphery of theflange 48 and a suitable detent (not shown herein), which; is adapted to move vertically within a casing .55 and to be actuated .for vertical movement by a to be engaged by a cam 63. The connectionbetween the lever 58 and the detent within the sleeve 55 is such as to provide for certain necessary lost motion. In operation, when the lever 58 is moved sufficiently in a counterclockwise direction, as, seen in Fig. 1, about its pivot 55,.by the cam 63, the .detent will be' withdrawn from the adjacent notch 53 to permit inversion of the turn-over unit. When the lever'58 is moved from its extreme counterclockwise position, the detent will be spring pressed into engagement'with one or the other of the notches 53.

The body blank mold 48 is opened and closed independently of the neck mold-by mechanism, which for the greaterpart is disposed within the sleeve 46.. This mechanism includes a yoke 64 spaced inwardly from the corresponding blank mold and connected to the body mold sections bymeans of levers 65, which are pivoted intermediate their ends to the yoke by vertical hinge pins 66. The outer end of each lever is pivoted to the adjacent mold arm 4|. vA push rod 68 is threaded into or otherwise secured to the yoke 64,

said rod extending axially through the sleeve '46 and being slidingly connected at its inner end to a slide block 68, which carries a cam roll 10 operatively engaged with a stationary cam I I, the

. column 35. A coil spring 13, encircling'the rod 82 abuts, the opposite end of this spring latter carried by a hub 12 keyed to the central 68 and bearing at its outer end against a collar 14 and at its inner end against a sleeve-like ex tension 15 on the block 68, yieldingly holds the yoke 64 and the slide block 66 in their maximum spaced relation and provides operating, connection between them. x}

Arranged in proximity to the inner side of the yoke '64 is a spreader I6, which is mounted for sliding movement in the direction of the length of the rod 68 and operated to impart additional mold closing pressure to the levers 65 to lock the mold in closed position. This is'accomplished by providing for engagement-between cam surfaces 11 on the spreader l6 andsimilar surfaces on the inward extensions 18 of the levers 65. The spreader I6 is suitably securedto the outer end of a sleeve 19, which partially encloses the push' rod 68 and completely encloses the coil spring 13, this sleeve telescoping over the tubular'extension 15 on the slide block 69.. The outer end 88 of the sleeve 'I9 is reduced in diameter to provide an annular shoulder 8| against which a; coil spring engaging the outer end of the tubular extension 15.

Thus, it will be seen that radial outward movement of the camrol'ler I8 operates through the twocoil springs 13 and 82 andthe yoke 64 and levers 65 to close the body-blank mold 40; and that after a predetermined extent of movement on the part of the yoke 64, the spreader I6 begins to function,and by applying added closing'pres sure to the arms 4|, serves securely to hold the body blank mold 48 against premature opening and to lock that mold against any pressure which a,17s,oc4 p g version and reversion of the blank mold unit corthe intermediate spider 38. A plate 86 closes the inner end'of the bearing 41.

It will be understood that when the principles of the opening and closing mechanism, just described for an invertible blank mold, are applied either to a non-invertible blank mold or to a blow mold, which is usually non-invertible, some simplification may be made, as will be obvious to those skilled in the art, as there need be no relative rotational movement between the slide block 68 and the other parts of the device operated thereby including the spreader 16 and the push rod 6.8. There should, however, be a relative sliding movement permitted between-these parts, so that they cannot be rigidly secured together, but should be spaced apart by the compression springs 13 and 82. i

."Ihe operation of the machine illustrated in part in Fig. 1, and more particularly forming subject matter of my parent case, is not described vfully herein, but references may be had to my above-identified parent case fora full and comwhich is arranged to engage the end of a push rod '90 when the mold unit 33 is reverted to a neckup position to actuate asuitable wedge and thereby to open the neck ring against a spring (not shown);

In forming a blank or parison in the blank forming unit 33, the charge is supplied through the open end of the blank mold at a time when the baflie shown at. I 42 is above and laterally out of line with this mold. the charge preferably being supplied from a suitable automatic feeder in a manner now well known in the art. A suitable neck pin (not shown) is provided in association with the neck ring 43 and the charge may be settled either by suction transmitted to the region around the neck pin through a pipe I l l and suitable associated passages or by pressure supplied through the upper end of the blank mold, or both.- Counterblowingoperations may be carried on in a conventional manner, or in the particular 'manner illustrated in my said parent case. In -asmuch, however, as the process or forming-pariparison in the blank forming unit 33, it may be transferred by suitable means to a final blow mold. which in the parent case is mounted on an adjacent rotary table, and there expanded to final form- Here again, the particular means for transferring and final blowing the parisons form no necessary part of the present invention and are not illustrated.- These operations may be carried on in the manner fully disclosed in my parent application, or in any other desiredmanner, including those known to the art.

While I have shown and described but one embodiment of my invention, it will be understood that the principles thereof may be applied in many difierent ways, and certain features may be used independently of others. I do not wish to be limited, therefore, except by the scope of the appended claims, which are to be construed as broadly as the state of the prior art permits.

I claim:

1. In a glassware forming machine, a mold comprising a pair of cooperating sections pivoted to a common hinge pin, a pair of levers connected to said mold sections and pivoted to separate hinge pins disposed parallel to the first named hinge pin, a yoke connecting said separate hinge pins, means for moving said yoke in a fashion alternately to open and close the mold, and a device operable by the yoke moving means forapplying additional closing pressure to said levers, said device including extensions carried by said levers and a spreader movable into and out of engagement with said extensions.

2. In a glassware forming machine, a mold comprising a pair of cooperating sections pivoted to a common hinge pin, a pair of levers connected to said mold sections and pivoted to separate hinge pins disposed parallel to the first named hinge pin, a yoke connecting said separate hinge pins, 'a push rod connected to said yoke, cam means for actuating said rod and thereby alternately opening and closing the mold, and means a for applying closing pressure to the mold in addition to that necessary to close the mold including extensions on said levers and a spreader actuated by said cam means and thereby brought into operative engagement with said extensions.

3. In combination, a mold comprising a pair .of sections pivoted too. common vertical hinge pin, a yoke, a pair of levers pivoted substantially midway their lengths to the ends of said yoke, means connecting one end of each of the levers to the mold sections, means for moving the yoke and levers to close the mold, and means adapted yieldingly to engage the other ends of said levers and thereby apply pressure to the mold sections beyond that necessary initially to close the mold.

4. In combination, a mold comprising a pair of sections pivoted to a comon vertical hinge pin, a yoke, a pair of levers pivoted substantially midway their lengths to the ends of said yoke, means connecting one end of each of the levers to the mold sections, means for moving the yoke and levers to close the mold, and means adapted yieldingly to engage the other ends of said levers and thereby to apply pressure to the mold sections beyond that necessary initially to close the mold, said last named means including a spreader, cam means primarily operating to move said yoke and levers in closing the mold and a yielding operative connection between said spreader and said cam means.

FRANK O'NEILL.

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