JPS6230629A - Gob feeder for glass - Google Patents

Abstract

PURPOSE:To decrease the variations of the shape and weight of gobs, by using a vertically movable shearing mechanism in a gob feeder for glass forming and lowering the shearing mechanism according to the flow-down of the molten glass during the cutting process of the molten glass. CONSTITUTION:The shearing mechanism for the cutting of molten glass in a gob feeder is made movable vertically by the following means. The hydrolaulic motor 37 is driven alternately to normal and reverse directions synchronously to the vertical motion of the plunger 3, the first hydraulic cylinder apparatus 41 is operated, and a pair of horizontally arranged shear arms 31 are driven vertically via the piston rod 41a and the casing 39. Synchronously to the closing motion of the shear arms 31, the shear arms 31 is lowered by the first hydraulic cylinder apparatus 41 at a speed corresponding to the flow-down speed of the molten glass.

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 apparatus for molding glass containers 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 molten glass having a uniform size and shape using a gob feeder. It is continuously supplied in the form of a lump at regular intervals in a molding manner, and the molding hoe J3 is used to mold a predetermined product.

FIG. 4 is a diagram showing a schematic configuration of a bifurcated gob feeder, in which an orifice 2 is bored in the bottom wall side of the melting furnace 1 lined with refractory material. Above the orifice 2 is movable in the vertical direction.
A plunger 3 for opening and opening is provided.

A cylindrical member 4 is rotatably disposed concentrically with the plunger 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 It is formed between the lower end of the cylindrical member 4 and the bottom wall surface of the melting furnace 1, and communicates with the inside of the melting furnace 1 through a gap. 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, falling speed, shape, etc. of the stones 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 5a, 5b 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 that two cutters 9a and 9b are provided, corresponding to the gobs being 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 shear cam roller lever 13 via a connecting rod 12. The shark roller lever 1
3 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.

Therefore, the arm 6b is @
7b in the clockwise direction, while the other arm 6a is urged in the counterclockwise direction via the pinions 8a and 8b, so that both arms are urged in the closing direction by the single spring. 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 Shire cam 16.

On the other hand, as shown in FIG. 5, the plunger 3 has its top end mounted on and supported by the plunger arm 20.
The plunger arm 20 is connected to a plunger lifting rod 22 that can move up and down along a guide member 21. The plunger lifting rod 22 has a pin shaft 2.
One end of a link 24 that can swing about 3 is pivotally attached, and the top end of a connecting rod 25 is connected to the top 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 shear cam 16. Note that the reference numeral 29 in the figure is a stroke indicator of the plunger 3.

When the plunger 17-cam 28 is rotated, the cam roller 2 which is in pressure contact with the plunger cam 28
7, the plunger lifting rod 22 moves up and down via the connecting rod 25, link 24, etc., and the plunger 3 is moved up and down by the plunger lifting rod 22.
is moved up and down to control opening and closing of the orifice 2, and the pushing action of the plunger 3 causes molten glass to flow down from the orifice 2.

On the other hand, 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 5b are opened via the shear cam roller lever 13, connecting rod 12, etc. IntL.

The molten glass falling from the orifice 2 is cut by the cutters 9a and 9b provided at the tips of the arms 5a and 3b, and the cut molten glass is transferred to the molding machine installed below (Fig. (not shown).

Figures 7(a) to (e) show the plunger 3 and cutter 9a.
, 9b, when the molten glass flowing down from the orifice 2 is further pushed out by the descent of the plunger 11-3 (FIG. 7(b)), the molten glass flows into FIG. 7(C). As shown, the diameter of the molten glass tends to decrease as the plunger 3 rises, and during this time it is cut by the cutters 9a and 9b and falls as a gob W. As the molten glass is cut in this way, the plunger 3 rises and the cutter 9
a and 9b are also open (Fig. 7(d)).

(e)) Move on to the next cycle. Note that the numbers in the figure indicate drop guides.

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 subsequent molding process of glass containers, etc. However, the shape and cut surface may cause variations in product weight, product defects may affect yield, and the maintenance and actual operating time (actual operating rate) of each part of the feeder may be affected.

However, in the gob feeder, the cutters 9a and 9b only open and close at fixed positions as described above, so during cutting of the molten glass, the flow of molten glass is partially interrupted by the cutters 9a and 9b. The cutter is stopped, and the molten glass at the cut surface tends to move laterally with the movement of the cutter under pressure from above.

As a result, the cut of the molten glass becomes irregular, resulting in variations in the shape of the gob, 11, etc., and product defects are likely to occur. Furthermore, since the cutter opens and closes at a fixed position relative to the flowing molten glass, unreasonable force is applied to the cutter in the direction of the flow of the molten glass, which requires thorough maintenance and requires a long time to maintain each part of the shear mechanism. There are also problems such as the need for

[Purpose of the invention]

In view of these points, the present invention has small variations in gob shape and weight Φ, eliminates product defects, and
To provide a gob feeder that does not apply abnormal force to a cutter or the like, does not require much time and labor for adjustment and maintenance of the part, and can feed gobs at high speed.

[Summary of the invention]

The present invention enables the shear mechanism for cutting molten glass disposed below the melting furnace to be moved up and down, and also to lower the shear mechanism during the molten glass cutting process, thereby creating a gap between the flow of molten glass and the cutter. It is characterized in that the relative velocity in the downstream direction can be suppressed to a predetermined value.

[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.

I of the above shear arm 31! The ends are each fixed to a shaft 34 supported by an upper bearing 32 and a lower bearing 33, and binions 35, which are integrally provided in the mm portion of both arms 31 and 11, are meshed with each other. The shear arms 31 are configured to swing in opposite directions about the axis '34, and the cutter 30 provided at the tip of both the -F2 shear arms 31 is moved into the melting furnace by the swing of the shear arms. The axis of the orifice 2 provided on the bottom wall of the orifice 1 is moved in the direction vL.

By the way, one of the shafts 34 to which the shear arm 31 is fixed is connected to a hydraulic morph 37 via a universal joint 36 whose length can be freely adjusted in the axial direction, and the lower end of the shaft 34 has a rotating shaft. A position purchase sensor 38 is connected. Furthermore, the casing 39 that houses the pinion 35 and the like is vertically movably disposed on a guide bush 40 installed on one side of the melting furnace 1, and is further disposed so that its axis is directed in the vertical direction. It is connected to a piston rod 41a of a first hydraulic cylinder device 41 provided therein.

On the other hand, a second hydraulic cylinder device 4 is installed on the other side of the melting furnace 1.
2 is arranged so that its axis is directed in the vertical direction,
The piston rod 42 of the second hydraulic cylinder device 42
A plunger arm 20 equipped with the plunger p-3 is connected to a.

When hydraulic oil is supplied to and discharged from the working chamber of the second hydraulic cylinder device 42, the piston rod 42a moves up and down, and the plunger 3 moves up and down via the plunger arm 20 due to the up and down movement of the piston rod 42a. As a result, the orifice 2 is opened and closed, 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 first hydraulic cylinder device 41 is operated, and the shear arm is 31 is moved up and down. That is, the driving force from the hydraulic motor 37 is transmitted to the shaft 34 via the universal joint 36, and one seat arm 31 is swung in a horizontal plane by the shaft 34. Then, the other shear arm 31 is also swung in the opposite direction to the one shear arm, and the pair of left and right shear arms are driven in the opening and closing directions relative to each other. Meanwhile, in synchronization with the movement of the left and right pair of shear arms 31 in the closing direction, the first hydraulic cylinder device 41
As a result, the shear arm 31 is lowered at the same speed as the flow rate of the molten glass. Therefore, due to the movement of the shear arm in the closing direction and its descent at the same speed as the flow of the molten glass, the molten glass falling from the orifice 2 by the left and right cutters 30 is kept in a state where there is no relative movement between the shear arm and the molten glass. The chunks or gobs are cut into the required amount.

FIG. 2 is a control circuit diagram of the first hydraulic cylinder device @41, in which setting signals such as the moving speed of the shear arm 31 and the upper end height of the stroke shear blade from the setting device 43 are sent to the comparator as control signals. 44 and an amplifier 45 to a servo valve 46, and by controlling the opening and closing of the servo valve 46, the first hydraulic cylinder device 41 is controlled, and the vertical speed and stroke of the shear arm are controlled. On the other hand, J:
The movement of the shear arm 31 is detected by the strike whitening detector 47, and the detection signal is fed back to the comparator 44.

By the way, it is desirable to install the hydraulic pump nut, control valve, etc. as compactly as possible and place it near the actuator such as the hydraulic motor or hydraulic cylinder device. 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.

FIG. 3 is a diagram showing another embodiment of the present invention, in which the shear mechanism is moved up and down by mechanical means instead of a hydraulic cylinder device.

That is, the tip of a swinging lever 50, which is pivotably mounted around one end of the casing 39 housing the binion 35 and the like, is connected via a link 51. Furthermore,
An eccentric ring 52 is provided to adjust the upper limit position of the shaft 11-. By appropriately swinging the swinging lever 50 by the drive mechanism, the casing 39 is moved up and down via the link 51, and thereby the shear arm 31 is moved up and down, which is the same as in the first embodiment. perform an action. In addition, in the above embodiment, the shear arm 31 is lowered at the same speed as the flow rate of the molten glass during the cutting process of the molten glass, but it is not necessary to set both at the same speed. Instead, it may be possible to avoid descending at a relative speed.

〔Effect of the invention〕

As explained above, the present invention enables the shear mechanism for cutting molten glass disposed below the melting furnace to be movable up and down, and also to lower the shear mechanism during the molten glass cutting process of the shear mechanism. Therefore, during the cutting process, the relative speed between the cutter and the flowing molten glass can be kept at zero or within a predetermined value, and the shape of the cut surface can be made neat.
The variation in i can be reduced, and product defects can be reduced. Therefore, it is possible to improve product yield. In addition, since the cutter can cut with almost no relative movement relative to the flow of the gob, cutting is not strained, and the feeder can be operated at high speed. No abnormal force is applied, the time required for maintenance of the relevant part can be reduced, and the actual operating time can be improved.

[Brief explanation of drawings]

Fig. 1 is a longitudinal partial side 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 diagram showing another embodiment of the present invention, and Fig. 4 is a conventional gob feeder. - FIG. 5 is a plan view of the same shear mechanism, FIG. 6 is a diagram showing the plunger drive mechanism, FIG. 7 (a) to (e) are the plunger V - is an explanatory diagram of the operating state of the cutter. DESCRIPTION OF SYMBOLS 1... Melting furnace, 2... Orifice, 3... Plunger, 20... Plunger arm, 30... Cutter, 31... Shear arm, 35... Binion, 41... - First hydraulic cylinder device, 42... second hydraulic cylinder device. Applicant's agent Mr. Sato - Figure 1 Figure 3 Figure 4 Old Figure 5 6b 9b Figure 6 (a) (b) (C) Condolences 7
mouth

Claims (1)

[Claims] 1. In a gob feeder for supplying lumps of molten glass to a molding machine for glass products, a shear mechanism for cutting molten glass disposed below the melting furnace is movable up and down, and A gob feeder for glass, characterized in that the shear mechanism is lowered in accordance with the flow rate of the molten glass during the process of cutting the molten glass by the shear mechanism. 2. The gob feeder for glass according to claim 1, wherein the shear mechanism is lowered at the same speed as the lowering speed of the molten glass. 3. The gob feeder for glass according to claim 1, wherein the shear mechanism is lowered at a predetermined relative speed to the lowering speed of the molten glass. 4. The gob feeder for glass according to claim 1, wherein the vertical movement device of the shear mechanism is a hydraulic drive device. 5. Claim 1, wherein the vertical movement device of the shear mechanism is a link and lever mechanism.
Gob feeder for glass as described in section.