US1756728A - Multiple press head for glassware-shaping machines - Google Patents

Description

April 29, 1930. c, 3 sum; 1,756,728

MULTIPLE PRESS HEAD FOR GLASSWARE SHAPING MACHINES Filed Nov. 3, 1925 2 Sheets-Sheet l In ven tar Ulzziwzfifiudd I Attorney.

H II

April 29, 1930. c, ung 1,756,728

MULTIPLE PRESS HEAD FOR GLASSWARE SHAPING MACHINES Filed Nov. 3. 1925 2 Sheets-Sheet 2 c z f g A Horn ey.

' with various finishes.

Patented Apr. 29, 1930 UNITED STATES.

" PATENT OFFICE CLINTON S. BUDD, OF CLARION, PENNSYLVANIA, ASSIGNOR TO HARTFORD-EMPIRL COMPANY, OF HARTFORD, CONNECTICUT, CORPORATION OF DELAWARE MULTIPLE PRESS HEAD FOR GLASSWARE-SHAPING MACHINES v Application filed November 3, 1925. Serial No. 66,513.

My invention relates to glass pressing apparatus and it has special reference to apparatus for pressing the finish openings of hollow glass articles made by pressing or by pressing and blowing.

In the manufacture of bottles, jars and other hollow glassware, the top opening or finish of the article is frequently made by inserting a plunger into a mold containing a charge of molten glass,- the plunger and the mold being suitably shaped to produce the finished contour of the neck or other top opening of the article, which is termed the finish. The body of the article may be completed by the same pressing operation, or the pressing operation may produce an intermediate blank or parison in which only the finish is completed, the body of the article being thereafter expanded by blowing.

Milk bottles, jars and other kinds of pressed or pressed and blown glassware are now made in a great variety of shapes, and articles of the same general size and shape are made Each individual finish must be produced with a plunger and a mold made for that particular finish. The matter is further complicated by the fact that bottles and jars of this class are often made to fill comparatively small orders, and it is therefore desirable to provide the manufacturer with means for making articles having more than one finish, upon a single automatic machine and during the-same operation of the machine.

vMy present invention aims to satisfy these requirements by providing a press head hav-- more plungers of different shapes, as will more fully appear below.

In the accompanying drawing: Figure 1 is a plan view of a multiple press head constructed and operated in accordance with my invention, this apparatus being shown in connection with a portion of a rotary mold table;

Fig. 2 is a side elevational view, with parts in Section, of the apparatus shown in Fig. 1; an

Fig. 3 is aside elevatonal view of the press head as seen from the right of Figs. 1 and 2, the mold and the mold table being shown in section.

In .the drawing, the numeral 2 represents a holder which is secured to, and projects horizontally from, a swinging frame composed of an upper plate 3 to which the holder 2 is bolted, a lower member 4, vertical connecting members 5 and 6 secured adjustably together by means of a bolt 7, and bearing members 8 and 9 that are mounted for vertical adjustment and for swinging movement upon a vertical shaft 10. The vertical position of the frame is fixed by a collar ll-surrounding, the shaft 10 below the bearing 9 and secured to the shaft by a set screw 12.

An extension spring 13 has one of its ends connected at 14 to the member 4 of the press head frame and its other'end is connected to' bring the molds successively to the position occupied in the drawing byw the mold 21, which is the pressing station of the machine. For the present purposes it may be assumed that the mold 21 is one of a series of molds having identical neck finishes, and that these molds are alternated with an equal number of molds 22 having different neck finishes. A lug 23 projects from the mold table somewhat in advance of each-of the molds 22.

As shown herein by way of illustration, each of the plunger mechanisms carried by the holder 2 comprises a central stem 24 and three rods 25 arranged triangularly around the central stem 24, the stem and the rods extending through the holder 2. The rods 25 also extend at their upper ends through a triangular plate 26,beneath which is secured a thimble 27 into which a thimble 28 is adapted to enter from above. A spring 29 is con tained within the enclosure formed by the thimbles 27 and 28. Springs 30 surround the vertical rods 25 between the plate 26 and nuts 31 applied to the rods 25. A main spring 32 surrounds the central stem 24 between the holder 2 and the under side of the thimble 27.

To the lower end of the central stem 24 below the holder 2 is secured a'plunger holder 35 in which is clamped a plunger 36. The plunger is surrounded near its lower end by a plunger ring 37 carried by a plate 38 that is removably secured by means of a clamp 39 to a plate 40 which. is carried by the lower ends of the vertical rods 25.

For the purpose of depressing the plunger mechanism, I provide I an air cylinder 41 having a piston 42 and a piston rod 43 stem 46 which projects upward from the thimble 28 of the plunger mechanism.

When the piston rod 43 depresses the stem 46, this movement is transmitted through the spring 29 to lower the plate 26 and the .plunger 36 and plunger ring 37 carried thereby.

The lowering movement of the plate 26, plunger 36 and plunger ring 37 first seats the plunger ring in the cavity 47 of the mold 21. Continued movement of the late 26 causes no further movement of the p unger ring 37, but causes a differential movement of rods 25 and plate 26, which causes the rods 25 to slide through the apertures in the plate, compressmg the springs 30. This continued movement also causes the plunger 36 to be lowered within the mold 21 and to force the glass to conform to the shape of the mold and ports 44 and for admitting and ex- The lugs 23 and 50 may suitably be made of and complete the neck finish of the glass article, this movement being transmitted through the spring 29 and serving to compress the spring 32. When the rod 43 of the operating cylinder rises, the plunger 36 will first be withdrawn out of engagement with the glass by the expansion of the spring 32, the plunger ring 37 remaining in cooperative relation with the'mold. 21 until the reverse difierential movement of the rods 25 plate 26 brings this plate into engagement with the nuts on the upper ends of the rods. Thereafter the plunger ring 37 and plunger 36 will be raised upwardly together to the position shown in Fig. 2 by the further expansion of the spring 32.

The specific plunger structure just described is shown merely as an example of suitable plunger mechanism, and it will be understood that any other suitable plunger arrangement may be employed.

As soon as an article has been pressed in the mold 21 at the pressing station, the table 20 is advanced to bring the mold 22 to the pressing station. During this advancing movement of the table, the lug 23 strikes a lug 50 which projects from the lower member 4 of the press head frame. The remainder of the table movement causes the lug 23 to carry with it the lug 50, thereby swinging the press head frame around the shaft-10 to bring the other press head to position above the pressing station. The article is pressed in the mold 22 in the manner described above, after which the table 20 advances another step. During the first part of this movement, the lugs 23 and 50 are still in contact and, therefore, the press frame back until it strikes the fixed stop member 16, thereby bringing the press head to its original position, as shown in the drawing.

In order to reduce the shock of engagement between the lug 23 and the lug 50, the lug 50 is mounted pivotally at 51, as shown in Fig. 1, and its rear end bears, through a member 52, against the end of a spring 53 contained in an opening in the lower member 4 of the press head frame. This opening is closed by a screw 54 which regulates the tension of the spring hardened steel having knife edges to reduce the amount of contact between these members. The amount to which the press head is swung beyond the pressing position after the second molding operation described above is determined by the amount of overlap between the lugs 23 and 50, and this overlap may be varied to enable the use of three or more .plungers on the same press head. Various. other means may be adopted for using more than two plungers. For example, two sets of lugs may be provided in different vertical positions and ins izs

sively. In such cases, all of the plungers have.

been identical in shape and have cooperated with molds also identical in shape. I consider that it is broadly novel with the present invention to provide a press head having two or more plungers of different contours with means for bringing the plungers into action my invention as set forth in successively to produce articles ofglassware having different neck finishes.

My invention has been found to be useful in the manufacture of milk bottles and other articles made by pressing or by pressing and blowin It is useful not only in the produc tion 0 wide-mouth and semi wide-mouth ware, but in the production of, narrow-neck bottles.

While the structure shown in the accompanying drawing has been found to be well suited for carrying my invention into actual practice, it will be understood that numerous changes'in the construction and arrangement of parts may be made without departing from the appended claims.

I claim as my invention:

1. Glass-working apparatus comprisinga rotary mold table, molds carried thereby, lugs carried by said table in advance of certain of said molds, a press head mounted to swing on a horizontal axis, a plurality of pressing plungers carried by said press head and mov able successively to a position above a pressing station to which said molds are brought by the rotation of said table, a lug carried by said press head and-adapted to be engaged by said first named lugs to swing said press head from a position in which'one of said plungers is at the said pressing. station to a position where another of said plungers is at the said pressing station, and a spring for returning said press head to its initial position when said lugs are disengaged.

2. The combination with a glass making machine having a blank mold and a plunger device cooperating therewith to form a blank th erein, of means for altering the plunger device to form dissimilar blanks during selected operations of said plunger device.

3. The combination witha glass making machine having a blank mold and a plunger device cooperatmg therewith to form a blank thereln, of means for automatically altering the plunger device to form dissimilar blanks during selected operations of the said plunger device.

4. The combination with a glass shaping machine having a blank mold member and a plunger member cooperating therewith to form a blank, of means for altering one of said members to form dissimilar blanks during-selected operations of the said members.

5. The combination with ,a glass shaping machine having blank-molds, and a forming member cooperating therewith, of means for altering the forming member to form dissimilar blanks during the operation of the shaping machine.

6. In combination in a glass shaping machine provided with blank molds successively presented to a pressing station, blank forming apparatus at said station adapted to cooperate with said molds and having a plurality of neck forming parts of different configurations, means for causing the cooperation with successive molds of different neck forming parts of said apparatus.

7 In combination in a glass shaping mafigurations, and means acting while the shaping machine is operating for presenting to the successive molds different ware shaping parts of said pressing mechanism.

8. In combination in a glass shaping machine having blank molds, a pressing head and means for moving the same toward and from the molds, a plurality of blankshaping members mounted on said pressing head and cooperating with said molds to form blanks, and means for causing different shaping members to cooperate with successive molds to fo ran blanks of different configurations therein.

9. The combination with a glass making machine having a blank mold and a plunger device cooperating therewith to form a blank therein, of means for altering the plunger device to form dissimilar blanks during selected operations of said plunger device, said means comprising a lug mounted for movement in a circular orbit, and cooperating ch ine having blank molds, means for forming means associated with said plunger device" causing said forming member to cooperate with the molds thus associated with said lugs to form blanks of one configuration, and means for causing said forming member to cooperate with the remaining molds to form blanks of another configuration.

11. The combination with a glass shaping machine having blank molds, and a forming member cooperating therewith, of means for altering the forming member to form dissimilar blanks during the operation of the shaping machine, said blank molds being successively broughtto a position for cooperation with said forming member in recurring cycles, and said means being such as to form blanks incertain of said molds of one form and to alter the forming member for enabling it in cooperating with the remaining molds to form blanks of another form therein, whereby on each complete cycle of said molds, predetermined numbers of blanks of two different forms will be formed.

12. In combination in a glass shaping machine provided withblank molds successively presented to a pressing station, blank forming apparatus at said station adapted to cooperate with said molds and having a plurality of neck forming parts of different configurations, means for causing the cooperation with successive molds of different neck forming parts of said apparatus, a rotatable carrier about Which'said blank molds are arranged? and said molds includin molds of at least two different internal con gurations,

.and said means being operable selectively to cause the cooperationwith the molds of one configuration of forming apparatus having one configuration of its neck forming parts and with molds of the other configuration of the forming apparatus having another configuration of its neck forming parts, whereby a plurality of different shaped articles are formed "on each complete revolution of said carrier. 7

Si ed ,at Clarion, Pa., this 7th day of Octo er, 1925. A

. y CLINTON S. BUDD.

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