US1761665A - Glass-blowing machine - Google Patents

Description

June 3, 1930. N 1,761,665

GLASS BLOWING MACHINEL Filed June 10, 1929 2 Sheets-Sheet 1 kiwi/V705 Hans Hillmann June 3, 1930. L A 1,761,665

GLASS BL WING MACHINE I Filed June 10, 1929 2 Sheets-Shani 2 Fig. 2.

//VIE/V70A Hans Hi Zlmarcn I mom/[rs Patented June 3, 1930.

pm oFFicE.

SYNDICATE, LmrrED, on LONDON, ENGLAND rinses-BLOWIN momN'n Application filed June 10, 1929,5erial No. 369,858, and in Germany June 22, 1928.

In the case of centrally divided iblank moulds for glass-blowing machines, it is important that during the suction of the glass into the blank-mould, not only should the 5 interior space of the blank-mould be evacuated, but also care should be taken to prevent any air entering said interior from outside through the joints, during the suction stage. It has already been proposed to provide, in the divisional surfaces of the halves of the blank-mould, air passages from which the air entering through the joints during the suction stage is aspirated in the same way as the air from the interior space of the blank-mould. v

In the bottle blowing machines in which the cavity of the blank-mould and the auxiliary passages disposed in the divisional planes'are connected with a common suction and blowing pipe, care must be taken that the air passagessituated in the joints are closed during the injection of compressed air serving to press the ball or gob of glass against the inner walls of the blank-mould, since otherwise they would contain compressed air which would enter the interior space of the blank-mould through the joints, thereby counter-acting the effect of the admission of compressed air into said s ace. The closing of the auxiliary passages is effected by providing valves or similar closing device between said passages and the common-pipe serving for theevacuation of air, and for the admission of compressed air for blowing,

which valves or the like automatically open under suction and close during blowing.

. A typical embodiment of the invention is illustrated in the drawing, in which Fig. 1, represents the'blank-mould during the suction stage, and Fig. 2 the blank-mould during the admission of compressed air.

a denotes a half of the blank-mould, with the divisional surface pointin forwards, i. e. radial to the machine. onsequently the divisional plane of the blank-mould lies in the plane of the drawing. 6 is the half of the neck mould, the divisional plane a: of which may be offset by 90 in rela tion to that of theblank-mould a. a is an air cylinder in which is movably dispospd, in

known manner, a piston d carrying the plug e, on which is attached a plate f, having a plurality of holes 9. The cylinder 0 is connected with an air pipe h which communicates alternately with the compressed air or suction pipe. Each half of the neck mould is provided with a bore 2' forming, at the hottom, a valve'seat k communicatingin. turn with a bore Z. A valve ball-.m plays on each valve seat. Each of-the bores l communicates with a passage 11. disposed in the divisional surfaces of the halves a of the blank-mould a. In the operative stage represented in Fig. 1 the pipe 6 is under a vacuum. The piston (2 being drawn downwards, the plug is in its lower end position. Air is drawn in through the holes 9 so that the interior space 0 of the blank-mould is evacuated andthe glass can be drawn in. In consequence of the negative pressure prevailing in the cylinder 0 air can, however, also be sucked in from the passages n through the joints of the blank-mould in the direction indicated by the arrow, since the li ht valve balls m lift at once under the in uence of the vacuum. When the blank-mould has been filled with glass and the surplus lass has been cut oil, below the blank-moul by the knife p (see Fig. 2) the air supply is reversed,'so that now compressed air enters the cylinder 0. The piston 03, with plug e, ascends. Compressed airacts on the ball of glass and presses it against the inner walls of the inner mould 0. At the same time, however, the

valve balls on are forced against their seats by the influence of the compressed air, so that the compressed air cannot enter the passages and therefore cannot disturb the premoulding in the mould. "In the embodiment represented, the automatic closing devices are shown in the form of ball valves, which are specially suitable for carrying out the invention by reason of their simplicity and reliability. This, however, does not prevent the employment'of closing devices similar to ball valves, for example cone valves, ring valves, plate valves and the like. I

In the specified construction these closin devices are located in the neck mould itsel This, however, does not preclude their interposition into the path of the suction and compressed air, in any other way.

1. In a divided blank mould, for 'a glass- ,5 blowing machine, having assages disposed in the divisional planes, t e combinaton of means providing a common suction and blowing space communicating with said passages and the mould cavit and automatically acting valves dispose and said space.

2. In a divided blank mould, for a glassblowing machine, having passages disposed in the divisional planes, the combination of means providing a common suction and blowing space communicating with said assages and the mould cavity, and ball va ves disposed between said passages and said space for closing said passages during the b owing stage.

3. In a divided blank mould and neck mould combination, for a glass-blowinginachine, wherein the blank mould has passages in the divisional planes and the neck mould has borescommunic'ating with said passages, means providing a common suction and blowing space communicating with said bores matically closing said passages during the blowing stage. 4.In a divided mould combination, for a glass-blowing machine, wherein the blank mould has-passages in the divisional planes and the neck mould has bores communicating with said passages, means providing a common suction and blow-' ingspace communicating with said bores and the mould cavity, and valves arranged to seat automatically in said bores during the blowing stage. a 5. In a glass-blowing machine, the combination of a divided blank mould having passages dis osed in the divisional planes, a coacting divided neck mould hav ng bores to ing to align wi the mould cavity, a c 1113- der surmounting said neck mould to orm a common space in communication with said bores and central opening, means for alternately connecting said space with a source of suction and with a source of su ply of pressure air, valves for 'automatica y closing said passages during the air supply, a

' piston sli carried by said piston.

6. In a glass-blowing machine the combination of a divided blank mould having passagesdisposed in thedivisional lanes, a coacting divided neck mould having bores to align with said passages and a central opening to align wit-h the mould cavity, a cylinder surmounting said neck mould to form a common space in communication with said 7 bores and central opening, means for alter- 35 nately connecting said space with a source Gil between said passages and the mould cavit and valves for auto-- blank mould and neck align with said passages and a central open-- able in said cylinder, and a plug of suctionand with a source of supply of pressure air, valves for automatical y clos- .1ng said assages during the air supply, a

piston sli able in said cylinder, a plug carried b said piston, and a ported member on said p ug arran ed to seat on said neck mould over its centre opening during the suction stage. I

7. In a glass-blowing machine, the combination of a divided blank mould having passages dis osed in the divisional planes, a coacting divided neck mould having bores to align with said passages and a central opening to align with the mould cavity, a cylinder surmounting said neck mould to form a common space in communication with said bores and central opening, means for alternately connecting said space with a source of suction and with a source of supply of pressure air, valves arranged to seat in said bores during the air supply, a piston slidable in said cylinder, and a plug carried by said piston.

8. In a glass-blowing machine, the combination of a divided blank mould having passages disposed in the divisional planes, a coacting divided neck mould having bores to align with said passages and a central opening to align with the mould cavity, a cylinder surmounting said neck mould to form a common space in communication with said bores and central opening, means for alternately connectingsaid space with a source of suction and with a source of supply of ressure air, valves arranged to seat in'said ores during the air supply, a piston slidable in said cylinder, a plug carried by said piston, and a ported member on said plug ar ranged to seat on said neck mould over its central 0 ening during the suction stage.

In testimony whereof I aflix my signature.

HANS HILLMANN.

Images