JPH0146447B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to glass melting furnaces for glass melting, such as pot kilns (open pots, cat kilns, etc.), day tank furnaces, etc. for the purpose of producing a wide variety of products in small quantities. This invention relates to a fully dynamic device that uses vacuum suction to accurately collect a certain amount of glass from glass and supply it to a mold for molding.

[Conventional technology]

The field of high-mix, low-volume production of various glass products is mostly targeted at small-scale so-called small-scale factories, and there are limits to the introduction of rationalization equipment, and even to this day, most of the seed-picking work is done by experienced workers. This is an artificial winding method that relies entirely on intuition and skill. To give an overview of the working method, open the mouth of the pot of boiled glass, remove the surface layer of glass, and rotate the blowing rod or winding rod, adjusting the speed of rotation according to the hardness and softness of the glass dough and temperature. Then, a certain amount of dough is rolled up, air blown or manually carried to the mold together with the rod, and then the required amount of glass is cut off with scissors into the mold and used for molding. In recent years, so-called gearing machines that mechanically perform this winding and transportation have been developed and used.
The glass in the furnace is rolled up from the surface by the rotation of a rod, and the required amount is cut into a mold with scissors; the principle is the same as the artificial seeding method.

[Problem that the invention seeks to solve]

In pot kilns, day tanks, etc., glass that is melted at night is generally seeded and molded during the day. Therefore, some of the components of the surface layer of the fabric that is in contact with air or other gaseous phases for a long period of time will evaporate and the expected glass will not be the same, and the melted material of the refractory in the upper structure of the furnace will be on the surface. It has the property that bubbles accumulate on the surface, and bubbles also collect on the surface. This tendency is particularly strong in hard glass and the like. Therefore, at the beginning or during the seeding operation, an operation called skim is performed to scrape and remove the surface glass. However, strictly speaking, this evaporation, contamination, etc. continues even during the daytime during work, and with the conventional winding method, winding has to be taken from the surface layer, so it is necessary to prevent foreign and contaminated glass from getting mixed in. I couldn't do it. In addition, the amount taken at one time is not accurate because it is based only on eye measurements and intuition, and the meat of the product is therefore non-uniform. Also, the bottom of the roll,
Glass that cannot be used at all, such as rod scum, is produced, and the melting unit consumption is reduced.

This seed-rolling work requires a high degree of skill and is difficult to train successors, as it involves intense physical labor that requires a high degree of skill, as the work involves exposing the glass fabric to the high-temperature radiant heat in front of the kiln, which changes every moment during the work. This target has become the biggest theme for the survival of these companies.

[Means to solve problems]

In order to solve the above problems, the present invention includes a seeding suction mold 50 that communicates with the vacuum head 46, is attached to the head 46 so as to be openable and closable, and has a conductive portion at least at the lower end, and a seeding suction mold 50 that communicates with the vacuum head 46 and has a conductive portion at least at the lower end. a mold feed control means for moving the suction mold 5 in parallel in the direction and rotation direction;
level detection means that outputs a detection electric signal when the conductive portion at the lower end contacts the molten glass; a cutting blade 89 swingably disposed at the bottom of the suction mold 50; and a cutting blade that drives the cutting blade 89. The driving means and the suction mold 50 are lowered toward the molten glass in the crucible 90, and after the suction mold 50 is lowered a predetermined distance into the molten glass from the position where the lower end of the suction mold 50 touches the molten glass, the suction mold 50 is lowered into the molten glass. After that, the suction mold 50 is pulled upward from inside the molten glass, and the suction mold 5 is removed by the cutting blade 89.
A sequencer 10 is provided for controlling the vacuum 46, mold feed control means, and cutting blade drive means so as to separate the suction end of 0 and send the suction mold 50 to a mold at a predetermined position. It is something.

[Effect]

The glass suction mold 50 is controlled to move between the forming mold and the inside of the crucible by a mold feed control means controlled by the sequencer 10, and when the lower end of the suction mold 50 touches the upper surface of the molten glass in the crucible 90, the level is lowered. The detection means outputs a detection signal to the sequencer 10. Upon receiving this signal, the sequencer 10 further moves the suction mold 5 at predetermined intervals.
0, and at the lowered position, lower the vacuum head 4.
6 generates suction force to suck the molten glass into the suction mold 50. Further, the sequencer 10 raises the suction mold 50 and causes the cutting blade 89 to cut the glass hanging down from the suction port 50C of the suction mold 50.
0 to a mold at a predetermined position, then opens the suction mold 50, and transfers the seed, ie, a certain amount of glass, in the suction mold 50 to the mold.The sequencer continuously performs the above operations.

〔Example〕

The structure of the present invention will be explained in detail below with reference to embodiments shown in the accompanying drawings.

In FIG. 1, 2 is a truck, 4 is a hydraulic cylinder installed inside the truck, 6 is a hydro converter,
Reference numeral 8 denotes each cylinder driving electromagnetic valve, 10 a sequencer, 12 a vacuum pump, and 14 a base plate rotatably supported by the truck 2, to which a support piece 16 is fixedly attached. A pinion is fixed to the shaft body fixed to the base plate 14, and the pinion meshes with a rack gear fixed to the piston rod 18 of the cylinder 4. The rack gear and pinion constitute a rotation mechanism 20 that converts the linear reciprocating motion of the piston rod 18 into rotational motion. 22 and 24 are support pieces;
Both ends of a pair of horizontal links 26, 28 are rotatably supported on the support pieces 22, 16, and both ends of a pair of vertical links 30, 32 are rotatably supported on the support pieces 22, 16. 34 is a hydraulic cylinder, one end of which is rotatably supported by a bracket erected on the base plate 14, and the tip of the piston rod of the cylinder 34 is rotatably supported by the link 30. 36 is a hydraulic cylinder;
One end of this is rotatably supported by a link 32,
The tip of the piston rod of the cylinder 36 is rotatably supported by the link 28. Reference numeral 38 designates a cylinder holder fixed to the support piece 38, to which a cylinder portion of a cylinder 40 is fixed via an insulating member, and a cylinder portion of a pneumatic cylinder 42 is connected to a piston rod 40a of the cylinder 40. There is. Reference numeral 44 designates a vacuum head outer holder whose upper end is fixed to the cylinder portion of the cylinder 42, and a vacuum head 46 (see FIG. 2) is disposed on this so as to be movable up and down. The upper end of the head 46 is fixed to a holder 48, which is connected to the drive rod 42a of the cylinder 42. 50 is a glass suction mold consisting of a pair of conductive metal molds 50a and 50b, and the molds 50a and 50b are fixed to holders 52 and 54, respectively. The mold 50 is formed into a substantially spherical shape, and a suction port 50C is formed at the lower end. As shown in FIG. 4, the holder 52 is provided with a pair of rising pieces 56, and the upper portions of the rising pieces 56 are rotatably fitted into the shafts of bolts 58, 60 fixed to the vacuum head 46. It matches. Further, the upper portions of a pair of rising pieces 62 erected on the holder 54 are similarly rotatably fitted to the shaft portions of the bolts 58, 60. 64, 66 are outer holders 44
The shaft body 64 is fitted with elongated holes 68, 70 formed in the lower side walls of the holder 52, 54, respectively. 78 are rotatably fitted through holes provided in these. The suction chamber 46a of the vacuum head 46 communicates with the suction mold 50 through small suction holes (not shown), while the suction chamber 46a and the molds 50a, 50
Suction chambers 81, 83 formed in b are connected to pipes 80, 85, 87 and vacuum valve 89'.
It is connected to the vacuum pump 12 via. The chambers 81, 83 are open to the joining surfaces of the molds 50a, 50b. Reference numeral 82 denotes a rotary pneumatic cylinder fixed to the cylinder 42, and the approximately middle portion of the rotary rod 84 is connected to the outer holder 4.
The rod 84 is slidably fitted into a tube portion of a guide 86 fixed to the rod 84, and one of the cutting blades 89 is fixed to the lower end of the rod 84. 88 is a furnace body, and 90 is a crucible. In FIG. 6, 92 is a relay;
One of the coils is grounded, and the other coil is electrically connected to the lower end of the suction mold 50. An electrode 94 made of platinum, molybdenum disilicide, or the like is disposed within the crucible 90, and the electrode 94 is grounded. A DC voltage of 8 volts is applied to the lower end of the mold 50, and the switch of the relay 92 is connected to the resistor 4.
It is set to operate at less than kilo ohm and turn off at 15 kilo ohm or more. The switch of the relay 92 is connected to the sequencer 10. still,
The suction mold 50 may be made of ceramic, and a conductive metal surface may be fixed to the lower end of the suction mold 50, and this metal surface may be electrically connected to the coil of the relay 92.

Next, the operation of this embodiment will be explained.

When the sequencer 10 controls the electromagnetic valve and drives the cylinder 34, the links 30 and 32 swing around the pivot point with the support piece 16, and the parallelogram structure of the links 30 and 32 causes the support piece to move. 2
2 moves in parallel in the front-back direction. Furthermore, when the cylinder 36 is driven, the support piece 24 moves in parallel in the vertical direction. Also, when the hydraulic cylinder 4 is driven,
The base plate 14 rotates, and the suction mold 50
oscillates horizontally around the center of rotation.
Further, when the hydraulic cylinder 40 is driven, the suction mold 50 and the cutting blade 89 are configured to move in the vertical direction in conjunction with each other. Under the control of the sequencer 10, the suction mold 50 is positioned at a predetermined position above the crucible 90, and then the hydraulic cylinder 40 is driven to remove the suction mold 50.
falls further. When the lower end of the suction mold 50 comes into contact with the raw surface of the molten glass 96 in the crucible 90,
Relay 92 operates and a relay switch signal is supplied to sequencer 10. sequencer 1
0 receives this signal and stops driving the hydraulic cylinder 40 after a predetermined period of time has elapsed. As a result, the tip of the suction mold 50 stops at a certain lowered position from the upper surface level of the molten glass 96. next,
The sequencer 10 drives the vacuum valve 89', and the suction mold 50 sucks molten glass from the suction port 50c. Next, sequencer 10
drives the hydraulic cylinders 40 and 36 to raise the suction mold 50, and when the suction mold 50 is separated upward from the crucible 90 and reaches a predetermined position within the furnace body 88, The pneumatic cylinder 82 is driven to reciprocate the rod 84, and the cutting blade 89 cuts off the portion hanging from the suction port 50c of the glass suction mold 50, that is, the butt end. This intake glass portion falls into the crucible 90. Next, the cylinders 36 and 40 are driven to raise the suction mold 50 to the outside of the furnace, and then the cylinders 34 and 4 are driven to place the suction mold 50 on the mold (not shown) placed at a predetermined position. I brought Mold 50. Next, when the cylinder 42 is driven and the vacuum head 46 is lowered relative to the outer holder 44, the bolt 5 communicating with the vacuum head 46 is moved.
8 and 60 are lowered relative to the outer holder 44. By lowering the bolts 58 and 60, the holder 52 swings clockwise in FIG. The glass seed in the suction mold 50 is supplied into the forming mold. When the cylinder 42 is driven in the opposite direction and the vacuum head 46 is raised to a predetermined position, the molds 50a and 50b are brought together by their own weight or the force of a return spring, and the glass suction mold 50 is closed leaving a suction port 50c. As is clear from the above description, the links 32, 30, 26, 28,
Base plate 14 and cylinders 4, 34, 36, 40
constitutes a mold feed control means that moves the suction mold 50 in parallel in the front-back direction, up-down direction, and rotational direction. Further, the relay 92 constitutes a level detection means that outputs a detection electric signal when the conductive portion at the lower end of the suction mold comes into contact with the molten glass.

〔effect〕

Since the present invention is constructed as described above, it has the following effects.

(1) By changing the suction mold and appropriately selecting the suction timing, it is possible to collect the desired amount of seeds within a predetermined range.

(2) Since the butt end of the suction mold is separated in the furnace, the butt end is remelted and is not wasted.

(3) Since the suction position is judged by the conductive part at the lower end of the direct suction mold, there is no need to set complicated drive schedules using separate calculations in advance for the constantly changing dough surface, and automatic pre-operation is possible. Can be done.

[Brief explanation of drawings]

1 is an overall explanatory diagram, FIG. 2 is a sectional view, FIG. 3 is a side view, FIG. 4 is a plan view, and FIG. 5 is a side view. 2...Dolly, 4...Hydraulic cylinder, 6...Hydro converter, 8...Solenoid valve, 10...Sequencer, 12...Vacuum pump, 14...Bed plate, 16...Support piece, 18...Piston rod, 20...Rotation mechanism, 2
2, 24...Support piece, 26, 28...Horizontal ring, 3
0, 32...Vertical link, 34...Hydraulic cylinder,
36... Hydraulic cylinder, 38... Cylinder holder, 40... Hydraulic cylinder, 42... Pneumatic cylinder, 44... Outer holder, 46... Vacuum head, 48... Holder, 50... Glass suction mold, 50C... Suction port, 52, 54... Holder ,5
6...Rising valve, 58,60...Bolt, 64,6
6... Shaft body, 68, 70... Long hole, 72, 74, 7
6, 78... rising piece, 89... vacuum valve, 82... pneumatic cylinder, 84... rotating rod,
86... Guide, 88... Furnace body, 90... Crucible, 92...
Relay, 94...electrode, 96...molten glass.

Claims (1)

[Scope of Claims] 1. A seeding suction mold 50 that communicates with the vacuum head 46, is attached to the head 46 so as to be openable and closable, and has a conductive portion at least at the lower end, and the suction mold 50 is connected to the vacuum head 46 in the front-rear direction, up-down direction, and A mold feed control means for moving the mold in parallel in the rotational direction, a level detection means for outputting a detection electric signal when the conductive portion at the lower end of the suction mold 50 comes into contact with the molten glass, and a level detection means that is swingably arranged at the lower part of the suction mold 50. The cutting blade 89, the cutting blade driving means for driving the cutting blade 89, and the suction mold 50 are lowered toward the molten glass in the crucible 90, and the lower end of the suction mold 50 touches the molten glass at a predetermined position. After the distance suction mold 50 is lowered into the molten glass, the glass seed is suctioned into the suction mold 50, and then the suction mold 50 is pulled upward from within the molten glass, and the suction end of the suction mold 50 is removed by the cutting blade 89. The vacuum head 46
A glass suction type automatic continuous seeding device equipped with a mold feed control means and a sequencer 10 for controlling cutting blade drive manual cutting. 2. A seeding suction mold 50 that communicates with the vacuum head 46, is attached to the head 46 so as to be openable and closable, and has a conductive portion at least at its lower end, and a mold that moves the suction mold 50 in parallel in the front-rear direction, up-down direction, and rotational direction. a feed control means; a detection means for outputting a detection electric signal when the conductive part at the lower end of the suction mold 50 comes into contact with the molten glass;
A cutting blade 89 is swingably disposed below the suction mold 50, a cutting blade driving means for driving the cutting blade 89, and the suction mold 50 is lowered toward the molten glass in the crucible 90, and the suction mold is 50
After lowering the suction mold 50 a predetermined distance into the molten glass from the position where the lower end of the mold contacts the molten glass,
The glass seed is sucked into the suction mold 50, and then the suction mold 50 is pulled upward from inside the molten glass, and the butt end of the suction mold 50 is cut off by the cutting blade 89 at a position directly above the crucible 90. the vacuum head 46, mold feed control means for feeding the suction mold to a forming mold located at a predetermined position;
and a sequencer 10 for controlling a cutting blade drive means. 3. The glass suction type automatic continuous seeding device according to items 1 and 2, wherein the suction mold 50 is made of ceramic.