US1439355A - Glass mold - Google Patents

Description

Patented Dec. 19, 1922.

UNITED STATES PATENT OFFICE.

'I'HOldAS A. BRAGG, OF TOLEDO, OHIO, ASSIGNOR TO THE OWENS BOTTLE COMPANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO.

GLASS MOLD.

Application filed March 25, 1920.

1 My invention relates particularly to a protecting device for use with the mold bottoms on a" glass forming machine. In machines of the type herein illustrated, in which each finishing mold is provided with a plurality of mold cavities, it has been found in practice that as the molds are opened, the finished articles which are discharged in rapid succession from the mold, strike the mold bottom in such a manner to cause rapid wear of said bottom. An object of the invention is to provide suitable means for overcoming this objection, as fully set forth hereinafter.

In the accompanying drawings:

Figure 1 is a fragmentary View showing a portion of a bottle forming machine to which the invention is applied.

Figure 2 is a sectional elevation of the finishing mold.

Figure 3 is a view of the open mold looking in a direction perpendicular to the mold bottom.

In Figure 1 is shown a portion of an Owens automatic bottle blowing machine which comprises a carriage having a series of arms or mold carrying frames 5 which: rotate with the carriage about the vertical axis of the machine. Each frame 5 carries a finishing mold comprising sections 6 and 7 mounted to move to and from each other about a. pivot pin 8 as an axis. These mold sections are provided with a plurality of moldoavities 9, 10. in which the bottles 11 and 12 are blown to their finished form. The bottom plate 13 is formed with depressions 14 and 15 which shape the bottoms of the bottles.

Whe the mold. during its travel around the machine axis. reaches the discharging position shown in Figure 1, it is in a downwardly inclined position determined by a cam 16 on which runs a roll 17 carried by the frame 5. At this point the mold sections are automatically separated (by means not shown) and the bottles allowed to fall out. The discharge of the bottles is controlled by Serial No. 368,612.

knock-out" disks 20 and :21 carried on a rock arm 22 on a rock shaft 23 controlled and actuated by a cam 24. For a detailed disclosure of thc knock-out mechanism, reference may he had to the patent to La France No. 1,351,098, October 21, 1919. The disks 2U, 21 are operated to engage the upper ends of thc bottles while the mold is opening, and are then lifted to release the bottles, the lowermost lJUttlt' ll being released slightly in advance ofthe other bottle. The lower bottle is out of the way as the upper bottle l2 falls from the mold.

It has been found in practice that without the use oi my inveulirm the bottles 12 as they hill from the mold strike the bottom plan and cause rapid wear, particularly at the edge of the depression 1:), as the machine is operating continuously and discharging the bottles at rcry short intervals To prevent such wear a striking plate or shield 25 is uttau'hcll to the bottom plate as by means of a screw ..(1 in such position that the bottles as they fall from the mold will strike said shield and thus he kept from striking the mold bottom. The plate 25 is readily detachable it will he understood that the form, size and position of the shield or Wear plate may be varied and may also be adapted to various styles of molds.

()ther modifications may be resorted to within the spirit and scope of my invention.

hatl claim is:

1. The combination oi a mold comprising separable sections, a mold bottom, and a shicld attached to said bottom and projecting upward adjacent the outer edge of said bottom into position to be engaged by articles as they are discharged from the mold and thereby prevent them from striking the mold bottom.

.2. The combination with mold sections $3 tom ed not thereof in position to engage articles being discharged from the mold and thereby protect said bottom plate.

4. In a glass forming machine, the tour bination of a mold support, a mold comprising an inclined pivot pin, mold sec tions mounted to swing to and from each other about said pin and extending in a downwardly inclined direction therefrom,

a downwardly inclined mold bottom. and a lug at the lower end of said mold bottom projecting upwardly above the surface thereofin the path of articles being discharged from the mold.

5. In a gl'hss forming machine, the combination of a mold support, a mold comprising an inclined pivot pin, mold sections mounted to swing to and from each other about said pin and extending in a downwardly inclined direction therefrom, a downwardly inclined mold bottom, and a lug at the lower end of said mold bottom projecting upwardly above the surface thereof, said mold bottom being formed with a plurality of cavities in which articles are formed, said cavities being: in line between the pivot pin and lug.

(i. The combination of a support. an inclined pivot pin projecting therefrom.

mold sections pivoted to said pin and pro jectin therefrom in a downwardly inclined tlilt(ti()i1, said sections each having a plurality of cavities, an inclined bottom plate having depressions to register with said cavities. said cavities and depressions being so located that the aiticle being discharged from one will pass over the depression in which another was formed, and a shield protrudinp above the bottom plate at a point beyond said depressions in position to prevent articles as they are discharged from the mold from striking the bottom plate and deforming a depression therein.

Signed at Toledo, in the county of Lucas and State of Ohio, this 12 day of March.

THOMAS A. BRAGG.

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