JPH04224117A - Blow air controlling mechanism - Google Patents

Abstract

PURPOSE:To securely execute the feed of blowing air into blow heads in a hollow glass product forming apparatus of a blow and blow system in diverse patterns. CONSTITUTION:The angle of rotation of a rotary table 13 is detected by a rotary encoder 30, and on the basis of the detected signal, by program controllers 34 provided in accordance with plural blow heads 16, the position of working stations where the blow heads 16 have been transferred are detected. The program controllers 34 have been storing the timing of the optimum air blow into blow heads in each working station and the data of its quantity. By the position signals of the working stations detected by the program controllers 34, the stored data of the air feed are selectively red out, and in accordance with the data, the opening of an electric valve 31 constituted of an electromagnetic valve 32 and a support valve 33 directly connected to the blow head 16 is controlled.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blow air adjustment mechanism in a molding apparatus for continuously manufacturing hollow glass products such as glass bottles by a blow-and-blow method.

0002

BACKGROUND OF THE INVENTION A blow-and-blow method is known as a method for forming hollow glass products such as thermos flasks and light bulbs. This method is disclosed in Japanese Patent Publication No. 49-14122, etc., and its outline will be explained based on the steps shown in FIGS. 5 to 14.

Glass 2 melted in the process tank furnace shown in FIG. 5 is guided to a feeder 1 and pushed out from an orifice 5 by a plunger 3 that moves up and down. The extruded glass 2 is cut by a shear blade 6 and becomes a gob 7 of a fixed amount of hot glass gob. The gob 7 slides on a chute 8 and is supplied to a press head 9 that can move up and down.

[0004] In the process of FIG. 6, the press head 9 rises and presses the gob 7 against the suction head 10. The gob 7 is pressed by the suction head 10 and the press head 9 to form a disk-shaped press gob 7a.

In the process shown in FIG. 7, the press gob 7a is vacuum-adsorbed by the suction head 10, the press head 9 is lowered, and while holding the press gob 7a, the suction head 10 is moved to the suction arm 10a.
It moves above the working table 11 by horizontal rotation. The working table 11 is supported around the periphery of a rotating horizontal rotary table 13, and is sequentially sent to a plurality of work stations as the rotary table 13 rotates.

The process suction head 10 shown in FIG. 8 stops vacuum suction of the press gob 7a when the transfer operation of the press gob 7a onto the working table 11 is completed. The press gob 7a is set at a predetermined position on the working table 11.

The press gob 7a in a semi-molten state on the process working table 11 in FIG. 9 hangs down from the hole in the orifice plate 12 of the working table 11 by its own weight. At the same time, the blow head 16 descends from directly above. The blow head 16 includes an air supply line 17 for primary blowing and secondary blowing, and is supported by the rotary table 13 together with the working table 11 through a support tube 14 . The blow head 16 and the working table 11 are rotated by the rotary table 13, and
Rotate at a given work station.

Process of FIG. 10 The working table 11 starts to rotate, blowing air for primary molding is blown from the blow head 16 into the press gob 7a which has been deformed due to hanging due to its own weight, and the molding of the parison 7b begins. This primary molding is
Rotation about the central axis P of the rotary table 13 is performed between a plurality of stations where the blow head 16 moves.

When the molding of the process parison 7b in FIG. 11 is completed, the molding molds 18, which are open on the left and right sides, begin to close. When the process mold 18 in FIG. 12 is completely closed, blowing air for secondary molding is blown into the parison 7b from the blow head 16. This secondary molding is also performed between a plurality of stations where the blow head 16 moves as the rotary table 13 rotates. A parison 7b is molded on the inner surface of the closed mold 18, and a hollow glass product, such as a bulb 7c, is molded.

When the valve molding process shown in FIG. 13 is completed, the air blowing stops, the mold 18 opens left and right, and the blow head 16 rises. The upper part of the valve 7c formed by the process shown in FIG. 14 is cut off from the orifice plate 12 by a disk cutter 19, falls under its own weight, and is sent to a lehr by a conveyor (not shown). The glass ring moil 7d remaining on the orifice plate 12 is collected as cullet and reused.

Each of the above steps from FIG. 8 to FIG. 12 is performed as shown in the plan view of the rotary table 13 in FIG. 2, for example.
This is performed in each area of the first to fifth work stations S1 to S5 where the blow head 16 moves intermittently. The first work station S1 is the position where the blow head 16 in the step of FIG. 9 is lowered. The second and third work stations S2 and S3 are the primary air blowing area A of FIGS. 10 and 11. The fourth and fifth work stations S4 and S5 are the secondary air blowing area B in FIG. 12. At each work station in these air blowing areas, a predetermined amount of air is blown from the blow head 16 into the parison 7b or 7c, which is in a semi-molten state, depending on the type of glass, and the hollow glass is gradually It is then molded into the desired shape.

The amount of air supplied to each work station in the air blowing area is adjusted via a center valve mechanism 20 as shown in FIGS. 3 and 4. The center valve mechanism 20 includes a rotating center valve 21 fixed to the center of the rotating table 13 and a fixed center valve 22 stacked on the rotating center valve 21. The rotary center valve 21 has air supply holes 23 connected to all the blow heads 16 of the rotary table 13 through air supply pipes 17. The fixed center valve 22 has air supply holes 24 at locations corresponding to each work station from the beginning work station S2 to the end work station S5 of the air blowing area. Air piping 25 is connected to each air supply hole 24 of the fixed center valve 22, and each air piping 25 is connected to a common air supply source 27 via a manual adjustment cock 26, respectively. Each adjustment cock 26 is connected to a fixed center valve 22 from an air supply source 27.
The amount of air sent to each air supply hole 24 is adjusted independently depending on the type of hollow glass product to be molded.

When the rotation of the rotary table 13 brings one air supply hole 23 of the rotating center valve 21 to the position of the first working station S2 of the air blowing area, this air supply hole 23 and the second operation of the fixed center valve 22 It matches the air supply hole 24 at station S2. Then, the second
Air is supplied from the air supply source 27 to the blow head 16 carried into the work station S2 in an amount set by the corresponding adjustment cock 26, and the primary air blowing in the step of FIG. 10 is started. This primary air blowing is repeatedly and intermittently performed in area A between work stations S2 and S3. Similarly, secondary air blowing is performed intermittently in area B between work stations S4 and S5.

[0014]

[Problem to be solved by the invention] The rotary table 13
The center valve mechanism 20 that supplies air to the blow head 16 around the rotary table 13 has a structure in which a rotary center valve 21 and a fixed center valve 22 are overlapped and in contact with each other. It may wear out. Such wear causes air leakage between the fixed center valve 22 and the rotating center valve 21, making it difficult to supply the blow head 16 with the correct amount of air regulated by the valve 26, and reducing the quality of the hollow glass product. It is a factor that makes it worse.

Furthermore, the plurality of air supply holes 24 of the fixed center valve 22 are connected to the plurality of air supply holes 24 of the rotating center valve 21.
The timings at which the numbers 3 and 3 match are the same, and air can only be supplied to each blow head 16 at this same timing. Furthermore, air is only supplied once to one blow head 16 at a fixed amount regulated by a valve 26. Therefore, depending on the shape of the hollow glass product to be molded, it may be better to shift the timing of air supply to each blow head 16 or to supply air once intermittently, but there are restrictions that prevent this. Ta.

The present invention has been made in view of the above problems, and its purpose is to improve the timing and amount of air supplied to a plurality of blow heads in a blow-and-blow type hollow glass product forming apparatus. To provide a blow air adjustment mechanism that can arbitrarily and accurately adjust the air flow over a wide range by giving uniqueness to each blow head.

[0017]

[Means for Solving the Problems] In order to achieve the above object, there is provided a plurality of blow heads for forming hollow glass products at equal intervals around the periphery, and a rotary machine that rotates to sequentially transport each blow head to a predetermined work station. a rotary encoder that detects the rotation angle of the table; an air supply source that supplies blowing air to each blow head of the rotary table;
An electric valve is placed in the air supply path to each blow head, and a rotary encoder connected to each valve counts detection signals to independently determine the work station position to which each blow head is transferred. detect,
A technical feature of the present invention is that the present invention is equipped with a program controller that controls the operation of the corresponding valve of each blow head in accordance with a preprogrammed opening adjustment memory at each work station based on the position detection signal.

[0018]

[Operation] A program controller installed corresponding to each blow head on the rotary table constantly detects the blow head work station position, which changes with the rotation of the rotary table, and performs a preset program at the detected work station position. By automatically adjusting the opening of the valve corresponding to the blow head according to the valve opening adjustment memory, the blow head can supply blowing air at the timing and supply amount appropriate to the position, no matter what work station position it is in. receive accurately. By independently controlling the air supply to the blow head using electrical signals using a program controller installed in each blow head,
The specifications of each blow head for one time of air supply can be varied, which is advantageous for forming hollow glass products of various shapes.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an embodiment of the present invention will be described with reference to FIG. Note that the same or equivalent parts as in FIG. 4 of FIG. 1 are given the same reference numerals.

The blow air adjustment mechanism shown in FIG.
A rotary encoder 30 that detects the rotation angle of the rotary table 13, an air supply source 27 common to each blow head 16 of the rotary table 13, a plurality of electric valves 31 connected to each blow head 16, and Connected to each of the electric valves 31 and corresponding to the electric valve 3
It has a plurality of program controllers 34 that automatically adjust the opening degree of one. An electric valve 31 and a program controller 3 are provided for each blow head 16.
4 is placed on the rotary table 13 and rotates together with the rotary table 13.

[0021] A rotary joint 3 is installed in the center of the rotary table 13.
The fixed part 37 of 6 is fixed, and the rotating part 38 of the rotary joint 36 is fixed.
and each of the plurality of blow heads 16 are communicated with each other through an air pipe 39. The fixed part 37 of the rotary joint 36 communicates with the air supply source 27 , and air from the air supply source 27 is sent from the fixed part 37 to the blow head 16 via the rotating part 38 and through each air pipe 39 .

The electric valve 31 is composed of a pair of electromagnetic valve 32 and a servo valve 33 connected in series to an air pipe 39. The pair of electromagnetic valves 32 and servo valves 33 are driven and controlled by control signals from a program controller 34. The program controller 34 is
A counter 35 counts the rotation angle detection signal of the rotary table 13 from the rotary encoder 30 to detect the work station position to which each blow head 16 is transferred. Further, the program controller 34 causes the electromagnetic valve 32 and the servo valve 33 to adjust the valve opening at each work station according to a preprogrammed memory based on the detection signal of the work station position of each blow head 16. Outputs drive control signals.

For example, each time the rotary table 13 rotates and the blow head 16 moves to each work station,
The count value of the counter 35 of each blow head 16 increases by a. When one blow head 16 is transferred to the first work station S1 in FIG. 2, the counter 35 corresponding to this blow head 16 is reset to zero. Then, with the first work station S1 as the reference point, the count value of the counter 35 of the blow head 16 of each work station increases in order of a, 2a, 3a, etc. From this count value, it is determined to which work station the blow head 16 is located. It is detected whether there is In addition, the second to third and fourth to fifth in FIG.
Data on the appropriate air supply timing and supply amount at each air supply work station S2 to S3 and S4 to S5 is stored in each blow head 16.
The program controller 34 is inputted as a valve opening adjustment memory. When one blow head 16 is transferred to one air supply work station, the valve opening degree stored in the program controller 34 corresponding to the work station position detection signal detected from the counter 35 of this blow head 16 is determined. The adjustment memory is read, and the corresponding pair of electromagnetic valves 32 and servo valves 33 are driven according to the data read out from the opening adjustment memory.

That is, when one blow head 16 is transferred to the second work station S2 at the beginning of air blowing, a proper Air is supplied to the blow head 16 with the timing and amount of air supplied. This air supply is performed by first opening the servo valve 33 to a desired opening degree, and then turning the solenoid valve 32 ON and OFF in this state to prevent malfunction due to a delay in driving the servo valve 33. This is done by making it easy to make subtle adjustments to the amount of air supplied. In this case, depending on the contents of the opening adjustment memory of the program controller 34, the air supply timing may be shifted from the timing of other work stations, or the air supply at the second work station S2 may be intermittently divided into multiple times. It is also possible to do so.

[0025] When one blow head 16 is transferred from the second work station S2 to the next work station,
The program controller 34 of the blow head 16 reads the opening adjustment memory corresponding to the transferred work station and newly adjusts the opening of the corresponding electromagnetic valve 32 and servo valve 33. Such valve opening adjustment is repeated at each air blowing work station.

[0026]

According to the present invention, the position of the work station where the blow head is transferred by the rotation of the rotary table is
Each blow head is detected by a program controller that corresponds to the blow head, and the blowing air supply to the blow head corresponding to this program controller is automatically controlled at the detected work station with appropriate air supply timing and supply amount. This makes it easy to set the timing and amount of air supplied to the blow head at multiple work stations, making it a highly versatile molding tool that can easily adapt to the diversification of shapes of hollow glass products. enable the realization of the device.

Furthermore, since air is supplied to each blow head on the rotary table through an electric valve directly connected to each blow head from a common air supply source without going through a center valve, there is no need to worry about air leakage. , a highly reliable blow air adjustment mechanism that is easy to maintain can be provided.

[Brief explanation of the drawing]

FIG. 1 is a side view of a molding apparatus showing an embodiment of a blow air adjustment mechanism according to the present invention.

FIG. 2 is a plan view schematically showing a molding apparatus equipped with a conventional blow air adjustment mechanism.

FIG. 3 is a plan view of the center valve in the molding apparatus of FIG. 2;

FIG. 4 is a side view of the molding apparatus of FIG. 2.

5 to 14 are partial side views at each step for explaining the molding process of the blow-and-blow molding device for hollow glass products.

[Explanation of symbols]

13 Rotating table 16 Blow head 27 Air supply source 30 Rotary encoder 31　Electric valve 34 Program controller

Claims (1)

[Claims] 1. A rotary encoder that detects the rotation angle of a rotary table that has a plurality of blow heads for forming hollow glass products at equal intervals around the periphery and rotates to sequentially transport each blow head to a predetermined work station; An air supply source that supplies blowing air to each blow head of the rotary table, an electric valve arranged in the air supply path to each blow head, and an electric valve connected to each valve and receiving a detection signal from the rotary encoder. counts and independently detects the transferred work station position of each blow head, and based on this position detection signal, adjusts the opening of the corresponding valve of each blow head at each pre-programmed work station. A blow air adjustment mechanism characterized by comprising a program controller that performs drive control according to memory.