Patent GB-190416600-A (GB)
Title: Improvements in Apparatus for the Manufacture of Glass-ware.
Inventor: GOOD ROBERT
IPC: B29C43/08
Filed: 1904-07-27
Granted: 1904-09-15
Abstract: 16,600. Good, R. July 27. Blowing; pressing; moulding; shearing; removing articles from moulds.-Relates to a machine for the manufacture of glass-ware, more particularly for manufacturing hollow glass articles by the well-known pressing and blowing process. In this machine, a parison mould 8, Figs. 2 and 3, is arranged between two blow-moulds 9, 9<a> on a reciprocating table 3. In the position shown, the parison mould is ready to be charged, the left-hand blow-mould is open, while the right-hand blowmould, containing a finished article, is still under the hollow pressing-plunger 14, which also acts as a blowpipe. On each side of the plunger, and over the initial positions of the parison mould, is provided a cutting-mechanism for severing the charge of molten metal from the gathering-iron, the two cutting, mechanisms being coupled together so that they have a slight vertical movement in reverse of each other. The charge is dropped through an opening 62 in an adjustable rocking cutter frame 48, which carries a pair of superposed blades having U-shaped cutting-edges, and a treadle 68 is depressed. This causes an arm 72 to swing forward and strike against a depending arm 74, of a weighted bell-crank lever 73, raising the latter, and, through a series of links and bell-crank levers, causing a slot 82, Fig. 18, in the end of the last of these levers to actuate a finger 83 on a rod 66. This rod is secured to one cutter, and connected by a pivoted link 67 to the other, so that the blades are simultaneously moved towards each other to cut off the gather, after which they are immediately returned to their original position by the dropping of the lever 73, as the arm 72 passes the arm 74. The downward movement of the treadle being continued, a rod releases a spring-controlled dog 154, Fig. 1, from a notch 153 in a disc 152 which is mounted on a cam shaft 27, and permits of a slight rotative movement of a cylindrical block 143, in which the main driving-shaft 141 is eccentrically mounted. This causes a friction wheel 145 on the shaft 141 to gear with a similar wheel 146 on a countershaft 43, which is in gear with the cam shaft 27, thereby rotating the latter. A drum 28 mounted on this shaft has a cam-groove 29, 30, 31 cut in it, in which the end of a stud 32 depending from the table 3 travels, this groove being so shaped that the table first commences to move longitudinally until the parison mould 8 comes under the plunger 14, and then stops. A cam on the face of the drum 28 then actuates a set of levers which cause horizontal shafts 97 to rock, this movement, which is communicated through another adjustable series of levers to the two sections of a neck mould 85 and its frame 86, being such that the mould is first closed and the frame then lowered bodily on to the parison mould. While this is proceeding, a roller at the end of a lever 44, Fig. 10, has been riding on the circumferential portion of a cam 45 mounted on the shaft 27, but, as soon as the neck mould is in its operative position, this roller drops on to a radial portion 47 of the cam, actuates an adjustable series of levers 41, 39, 38, 37, and withdraws support from a weighted lever 34 at the top of the machine. This lever therefore falls, and, in falling, straightens a toggle 33, 36, and impels the plunger 14 into the parison mould 8 to press the blank, after which the roller on the lever 44 again rides on the circumferential portion of the cam 45, raises the weighted lever 34, and withdraws the plunger. Projections 104 on the drum 28 then strike against levers 105, forcing their upper ends against the arms 108 of bellcrank levers, the other arms of which, being connected by links 110, 111, 113 to the sections of the parison mould, cause the latter to open, leaving the pressed blank suspended from the neck mould. The table 3 then begins to move forward again, bringing the blow-mould 9 under the suspended blank, the parison mould being consequently moved to its other charging position beneath the cutter frame 48<a>. The ends of the arms 108 of the bell-crank levers ride in the straight portion of a cam-groove cut in a disc 114 when the parison mould is beneath the plunger. but, as the table is moved to bring the blow-mould 9 into this position, the ends of the arms 108 move round a curved portion of this cam-groove, and cause the sections of the parison mould to close gradually. The sections of the blow-mould 9 are closed and those of the mould 9<a> simultaneously opened by arms secured to a rocking shaf 112, which is connected by arms 121, 122, to shafts 118, 118<a>. The shafts 118, 118<a> are actuated by tappets 126 and bent levers 127 from cams 128 on the shaft 27. As soon as the mould 9<a> is opened, the corresponding lever 127, as it continues to move forward, pulls upon a hook-shaped link 130, which tilts the bottom 129 of the mould so that the latter discharges its finished article. The blow-mould 9 having been closed, a trip arm on a shaft 137, which is driven by gearing from the shaft 27, strikes against one of two arms which actuate a valve 134, causing the latter to open and admit compressed air to a pipe 132, and through a flexible pipe 133 to the plunger 14, where, owing to its pressure, the air opens a spring-controlled valve 15 at the bottom of the plunger, and blows the blank in the mould. The neck-mould cam then actuates its levers first to open the sections of the neck mould and then to raise it bodily, immediately after which the other notch 153 in the disc 152 comes opposite to the dog 154, which is thrown into the notch by the falling of a weight on the treadle-shaft. This automatically stops the machine with the air still blowing into the mould, the blowing being continued until the machine is again started, in order to cool the article. The last feeding movement of the table also causes a projection 58 on the table 3 to engage a depending arm of a bell-crank lever 57, Fig. 13, which is connected by a link 56 to a second bell-crank lever 53. The latter is mounted on a shaft 52, and is also coupled up to a shaft 52<a>, these two shafts having depending spurs between which projects a finger secured to one of the pivot pins 50 about which the cutter frames rock, so that the movement of the lever 57 causes the frame 48 to rise, and the frame 48<a> to move into position over the parison mould. The latter is then charged, and the treadle again depressed to operate the right-hand cutter and start the machine, which, after the air supply has been cut off, repeats the above operations with first the parison mould and then the blow-mould 9<a> under the plunger. The amount of glass dropped into the parison mould is shown by an indicator, the spring-controlled pointer of which carries a rod which is actuated by a projection on the crosshead 19, into which the plunger is screwed, as the latter descends. In a modification of this machine, two sectional blow-moulds are mounted on a turntable which is free to rotate in a reciprocating table carrying the parison mould, and only one cutting- mechanism is employed. This machine is shown in Figs. II, V, XIV, XXV. In the position shown, the reciprocating table 3 is disposed so that the parison mould 8 is under the cutter, one of the blow-moulds 9 containing a finished article is under the plunger, and the other blow-mould 9<a> is open. The operator drops a charge through an opening in the cut-off mechanism 108, and then depresses a lever 100, Fig. V, with his gathering- iron. This, through a rod 99 and bell-crank lever 98, exerts a pull on a rod 97, which causes a weighted arm 93 to fall so that, through levers 103, 105, 107, it actuates the cut-off mechanism 108. The latter comprises two superposed blades with V-shaped cutting-edges, coupled together so that they act simultaneously to cut off the gather. A cam 92 is then given half a turn on its shaft 61, actuating a bell-crank lever 89, rocking shaft 87, arm 86, and an adjustable link 85, and causing the latter to pull on an arm 84, which depends from a bearing 83 in which the main shaft 76 is eccentrically mounted. This movement brings friction wheels on the shaft 76 and a countershaft 75 into gear, the latter being also in gear with the cam shaft 61, and sets the machine in motion. As the shaft 61 commences to revolve, a stud 69 travelling in a groove in a cam 68, causes the table 3 to move until the parison mould comes under the plunger, when, owing to the shape of this cam-groove, the table stops. A cam-disc 60 on the shaft 61 then actuates a rocker 129, loosely mounted on this shaft, which rocker transmits its motion through a series of links to a sectional neck mould 113, moving the latter as in the previous machine. A cam on the shaft 61, which controls the movement of a roller at the end of the last of an adjustable series of levers normally supporting a weighted lever at the top of the machine, then turns so that the plunger is first forced into the glass in the parison mould 8, and is then, after a short interval, withdrawn. At the same time, another cam on the shaft 61 engages one of two rollers carried by an arm which is secured to the operating-shaft of the turntable 28, and rotates the latter through half a revolution, accurately determined by stops, so that the mould 9 is carried to the rear of the machine, and the mould 9<a> moved into a position adjacent to and in line with the parison mould. Directly the plunger is withdrawn, a roller 24 on an arm 23, Fig: XIV, is engaged by a cam 25, causing a shaft 21 to rotate, whereby pinions 19 loosely mounted in bearings 17 are rotated by gear sections 20. These pinions cause inclined screw shafts 18 secured to the sections of the parison mould 8 to move longitudinally, and so open the mould, leaving the blank suspended from the neck mould. The carriage 3 is then moved back to its original position, during which movement rollers 26 on the gear sections 20 move on curved trac