JPS6230627A - Gob feeder for glass - Google Patents

Abstract

PURPOSE:To enable the feeding of gobs having uniform size and shape at a high speed, by linking a hydraulic driving apparatus to a plunger arm furnished with a plunger for the control of the flow-out of molten glass in a gob feeder for glass forming apparatus. CONSTITUTION:A lump of molten glass is fed to the molding machine for glass article by a gob feeder. A hydraulic driving apparatus is linked to a plunger arm 20 furnished with a plunger 3 for the control of the flow-out of molten glass in the above gob feeder. A piston rod 40a is moved vertically by charging or discharging a hydraulic oil to the hydraulic chamber of the hydraulic cylinder apparatus 40, and the plunger arm 3 is also moved vertically by the motion of the piston rod 40a via the plunger arm 20. The setting signals such as the moving speed, stroke, etc., of the plunger are transmitted as control signals from the setter 41 through the comparator 42 and the amplifier 43 to the servo valve 44. The opening of the servo valve 44 is controlled by the signal to control the hydraulic cylinder apparatus 40, which controls the speed and stroke of vertical motion of the plunger 3.

Description

Detailed Description of the Invention (Technical Field of the Invention) The present invention relates to a gob feeder for supplying gobs of molten glass to a molding device for molding glass products and other glass products. .

[Technical background of the invention and its problems] Generally, when molding glass containers and other glass products, molten glass melted in a melting furnace is processed into lumps of molten glass having a uniform size and shape using a gob feeder. It is continuously supplied to a molding machine at regular intervals, and a predetermined product is molded in the molding machine.

FIG. 4 is a diagram showing a schematic configuration of a general gob feeder, in which an orifice 2 is bored in the bottom wall-side part of a melting furnace 1 lined with a refractory material. Above the orifice 2 is movable in the vertical direction.
A plunger 3 is arranged through it to control the flow of glass.

A commercial-shaped member 4 is rotatably disposed concentrically with the plunger p-3 on the outer periphery of the plunger 3, and an annular space S formed by the cylindrical member 4 and the plunger 3 is , communicates with the inside of the melting furnace 1 through a gap formed between the lower end of the cylindrical member 4 and the bottom wall surface of the melting furnace 1 . The height position, rotation speed, etc. of the cylindrical member 4 are controlled by an attached adjustment device (not shown), and the top surface of the molten glass in the melting furnace 1 and the top surface of the molten glass in the cylindrical member 4 are adjusted, and the gob The weight, flow rate, shape, etc. of the material are controlled.

By the way, below the orifice 2, a shear mechanism 5 for cutting the lump of molten glass flowing down from the orifice 2 is disposed.

FIG. 5 is a plan view showing the main parts of the shear mechanism 5, in which the base ends of the left and right arms 6a, 6b are connected to the shaft 7a,
7b, and the pinions 8a, 8b mounted on the shafts 7a, 7b, respectively, are meshed with each other. Cutters 9a and 9b are attached to the tips of the left and right arms 6a and 6b so as to face each other, respectively. FIG. 5 shows an arrangement in which two cutters 9a and 9b are provided, corresponding to the arrangement in which gobs are supplied in two rows.

One arm 6a is connected to a crank device 11 via a link 10, and the crank device 11 is connected to the tip of a shark roller lever 13 via a hook rod 12. The shark roller lever 13
is capable of swinging with its base end as a fulcrum 14, and a shear cam roller 15 provided in the middle of the shear cam roller lever 13 is brought into contact with a shear cam 16 rotated by a drive device (not shown). There is.

Further, a lever 17 is provided protruding from the other arm 6b, and a tension spring 19 is tensioned between the tip of the lever 17 and a fixed point 18.

1. The arm 6b is biased clockwise around the shaft 7b by one of the springs, while the other arm 6a is biased counterclockwise via the pinions 8a and 8b, and eventually both arms are biased as described above. It is urged in the closing direction by a spring 19. Also, by biasing the arm 6a in the counterclockwise direction, the link 10. Connecting rod 12
etc., the shear cam roller lever 13 is urged clockwise about the fulcrum 14, and the shear cam roller 15
is pressed against the shear cam 16.

On the other hand, as shown in FIG. 5, the plunger 3 is mounted and supported at the top end portion of the plunger arm 20.
, the plunger arm 20 is connected to a plunge sea lifting rod 22 that can move up and down along a guide member 21. The plunger lifting rod 22 has a bottle@
One end of a link 24 that can swing about 23 is pivotally connected, and the top end of a connecting rod 25 is connected to the other end of the link 24. It is connected to the tip of a pivotally mounted cam roller lever 26. A cam roller 27 mounted on the cam roller lever 26 is brought into pressure contact with a plunger cam 28 provided coaxially with the ship cam 16.

Note that the reference numeral 29 in the figure is a stroke indicator of the plunger t-3.

When the plunger cam 28 is rotated, the cam roller 2 that is in pressure contact with the plunger 1F-cam 28
7, the plunger lifting rod 22 moves up and down via the connecting rod 25, link 24, etc., and the plunger 3 moves up and down as the plunger lifting rod 22 moves up and down.
is moved up and down to control the opening and closing of the orifice 2, and the molten glass is caused to fall from the orifice 2. Meanwhile, in synchronization with the plunger cam that moves the plunger p-3 up and down, the shear cam 16 also rotates, and the arms 6a and 6b are opened and closed via the shear cam roller lever 13, connecting rod 12, etc. Arm 6a, 6
The molten glass falling from the orifice 2 is cut by the cutters 9a and 9b provided at the tip of the orifice 2, and the cut molten glass is supplied to a molding machine (not shown) provided below. .

By the way, in such a gob feeder, it is very important to feed gobs with a uniform size and shape and a well-cut edge for the molding process of glass containers, etc. The size, shape, and cut surface affect product weight variations, product defects that affect yield, and the maintenance and actual operating time (actual operating rate) of each part of the feeder.

However, in the gob feeder as described above, the plunger 3 is moved up and down via the plunger lifting rod 22 by driving the cam, and the size of the gob falling from the orifice 2 is adjusted. If the number of rotations of the plunger cam exceeds a certain value for raising the plunger, the cam roller will separate from the cam, causing problems such as the inability to accurately control the vertical movement of the plunger, that is, the opening of the orifice. This causes problems such as friction and backlash, which gradually makes it impossible to supply gobs that have a uniform size and a neat cut. Furthermore, stroke adjustment of the plunger must be performed by replacing the plunger cam, which is inconvenient, such as the adjustment being troublesome.

[Purpose of the invention]

In view of these points, the present invention eliminates the occurrence of the cam separation phenomenon, eliminates the need for much time and effort for adjustment and maintenance of the plunge sea drive mechanism, and enables high-speed feeding of gobs with uniform size and shape. The first objective is to obtain a gob feeder that can feed gobs having the following properties.

[Summary of the invention]

The present invention provides a gob feeder for supplying lumps of molten glass to a molding machine for glass products, in which a plunger arm equipped with a plunger for pushing out the lumps of molten glass is operatively connected to a hydraulic drive device. It is characterized by this.

[Embodiments of the invention]

FIG. 1 is a partial longitudinal sectional view showing an embodiment of the gob feeder of the present invention. Below the melting furnace 1, there are a pair of left and right shear arms 31 (each having a cutter 30 at the tip).
(only one of which is shown in the figure) is provided.

The base end of the shear arm 31 is fixed to a shaft 34 supported by an upper bearing 32 and a lower bearing 33, and a binion 35 is integrally stepped at the base end of both shear arms 31. intertwined with each other,
Both shear arms 31 are configured to swing in opposite directions about the shaft 34, and the cutter 3'O provided at the tip of both the shear arms 31 is moved by the swing of the shear arms. It is designed to move in a direction transverse to the axis of an orifice 2 provided in the bottom wall of the melting furnace 1.

Incidentally, one of the shafts 34 to which the shear arm 31 is fixed is connected to a hydraulic motor 37 via a universal joint 36, and a rotational position sensor 38 is connected to the lower end of the shaft 34. .

On the other hand, a hydraulic cylinder device 40 is disposed on one side of the melting furnace 1 so as to face vertically along its axis, and the plunger p-3 is attached to the piston rod 40a of the hydraulic cylinder device 40. A plunger arm 20 is connected.

When hydraulic oil is supplied and discharged into the working chamber of the hydraulic cylinder device 40, the piston rod 40a moves up and down, and the up and down movement of the piston rod 40a causes the plunger 3 to move up and down via the plunger arm 20.
As a result, the orifice 2 is controlled and the gob is pushed out. On the other hand, the hydraulic motor 37 is driven alternately in the forward and reverse directions in synchronization with the vertical movement of the plunger 3, and the driving force from the hydraulic motor 37 is transmitted to the shaft 34 via the universal joint 36, and further @34 moves one shear arm 31 in the horizontal plane, and the other shear arm 31 is also swung in the opposite direction to the one shear arm through the pinion 35, so that the pair of left and right shear arms are moved against each other. Driven in the opening/closing direction. Then, as the silley arm moves in the opening/closing direction, the left and right cutters 30 cut the molten glass straw gob falling from the orifice 2 into required m pieces.

FIG. 2 is a control circuit diagram of the hydraulic cylinder 40, in which setting signals such as plunger moving speed and stroke are sent from a setting device 41 as a control signal to a servo valve 44 via a comparator 42 and an amplifier 43. The hydraulic cylinder device 40 is controlled by opening and closing the servo valve 44, and the vertical speed and stroke of the plunger are controlled. On the other hand, the hydraulic cylinder device 4
The movement of the plunger due to zero is detected by the stroke detector 29, and the detection signal is fed back to the comparator 42.

By the way, it is desirable to install hydraulic bombs, control valves, etc. as compactly as possible and place them near actuators such as hydraulic motors and hydraulic cylinder devices. The electric control device is placed near the plunger drive unit, etc., on the top, and the electric control device is installed at a location convenient for operation, away from the hydraulic pump, etc.

(Effects of the Invention) As explained above, in the present invention, the plunger arm equipped with the plunger for controlling the lump of molten glass is interlocked and connected to the hydraulic drive device. There is no cam separation phenomenon in the drive mechanism, enabling high-speed gob feeding, reliable plunger operation, ensuring gob weight accuracy and shape accuracy, and hydraulic pressure. The weight of the gob can be adjusted by controlling the drive device, improving the precision and yield of glass products.Furthermore, since it does not use a cam as in the past, it is possible to adjust the stroke. There is no need to replace cams each time, etc., and adjustments and maintenance that require a lot of time and effort are reduced.Also, since the hydraulic control circuit can be controlled remotely, It is also possible to omit adjustment work in a high-temperature atmosphere.

[Brief explanation of drawings]

Fig. 1 is a partial vertical cross-sectional view of the gob feeder of the present invention, Fig. 2 is a control circuit diagram of the hydraulic drive device, Fig. 3 is a partial vertical cross-sectional view showing the schematic configuration of a conventional gob feeder, and Fig. 4 is the same as above. FIG. 5, a plan view of the shear mechanism, is a diagram showing the plunger drive mechanism. DESCRIPTION OF SYMBOLS 1... Melting furnace, 2... Orifice, 3... Plunger, 20... Plunger arm, 31... Shear arm, 37... Drive motor, 40... Hydraulic cylinder device. Applicant's agent Mr. Sato-Yu 3 Figure f6

Claims (1)

[Claims] 1. In a gob feeder for supplying lumps of molten glass to a molding machine for glass products, a hydraulic drive device is attached to a plunger arm equipped with a plunger for controlling the flow of the molten glass. A gob feeder for glass, characterized by interlocking and connecting. 2. The gob feeder for glass according to claim 1, wherein the hydraulic drive device is a hydraulic cylinder device. 3. Claim 1, characterized in that the hydraulic drive device is remotely controlled by an electro-hydraulic control system.
Gob feeder for glass as described in section.