JPH04254423A - Blow air adjusting mechanism - Google Patents

Abstract

PURPOSE:To simplify an operation for adjusting the rates of the blowing air to be supplied to blowing heads in a hollow glass product molding device of a blow-and-blow system. CONSTITUTION:Servo valves 30 are mounted to respective air pipings 25 for supplying the blowing air to plural air feed holes 24 of a center valve 20 disposed in the central part of a turn table 13. Servo valve controllers 31 are connected to the respective servo valves 30 and the opening degrees of the respective servo valves 30 are independently adjusted via the servo valve controllers 31 in accordance with the control signals from a computer section 32. The rates of the blowing air to be supplied to the many blowing heads are automatically and simultaneously regulated in a short period of time and the operating rate of the molding device is improved.

Description

Description: [0001] 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] A blow-and-blow method is known as a molding method for 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 at each of the first to fifth work stations S1 to S5 where the blow head 16 moves. 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 areas of FIGS. 10 and 11. 4th ~
The fifth work station S4-S5 is the secondary air blowing area in FIG. 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.
[0012]Adjustment of the amount of air supplied at each work station in the air blowing area is performed 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. Fixed center valve 22
Air piping 25 is connected to each air supply hole 24, 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 2 from an air supply source 27.
The amount of air sent to each air supply hole 24 of No. 2 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 working station S2 of the fixed center valve 22 are connected. It matches the air supply hole 24 at. Then, air from the air supply source 27 is supplied to the blow head 16 carried into the work station S2, and the air is supplied to the corresponding adjustment cock 26.
The amount set in is supplied, and the primary air blowing in the step of FIG. 10 is started. This primary air blowing is repeatedly performed intermittently between work stations S2 and S3. Similarly, secondary air blowing is performed intermittently between work stations S4-S5. [0014] Incidentally, the above-mentioned hollow glass product forming apparatus is designed to increase the number of blow heads on the rotary table, increase the index, and improve mass productivity. Therefore, the number of adjustment cocks corresponding to each work station in the air blowing area including the primary and secondary air blowing areas on the rotary table is as large as several dozen or more, and the opening degree of each adjustment cock must be manually adjusted every time the type of hollow glass product is changed. Adjustment work was labor-intensive and took a considerable amount of time. In addition, the opening degree of the adjustment cock can be fully open, half open,
There are many detailed settings such as 1/3 open, etc., but it is difficult to manually adjust each to the desired opening because it depends on the skill level of the operator, and the quality of hollow glass products cannot be stabilized. This makes it difficult to The present invention has been made in view of these problems, and its purpose is to quickly and accurately adjust the blow air in a blow-and-blow type hollow glass product molding device. The object of the present invention is to provide a blow air adjustment mechanism that provides a blow air adjustment mechanism. Means for Solving the Problems In order to achieve the above object, the present invention provides a center valve disposed in the center of a rotary table having a plurality of blow heads for forming hollow glass products at equal intervals around the periphery. A blow air adjustment mechanism that supplies air from a plurality of air supply holes to the blow head at the timing when the blow head is carried into a predetermined work station, the mechanism being disposed in an air supply passage to each air supply hole of the center valve. A computer section that sets the opening degree of each servo valve depending on the type of hollow glass product, and a computer section that variably adjusts the amount of air supplied to the corresponding air supply hole. The present invention is characterized by comprising a plurality of servo valve controllers that drive and control each servo valve, respectively, based on a servo valve opening setting signal. [Operation] The servo valve opening setting value corresponding to the type of hollow glass product is inputted into the computer section by an appropriate operation such as key operation, and based on this input, the servo valve is sent from the computer section to each servo valve controller. When the opening degree setting signal is output, each servo valve controller simultaneously drives and adjusts the corresponding servo valve to the desired opening degree. Therefore, the amount of air supplied to the blow head of the rotary table can be adjusted all at once in a short time, and this adjustment is always accurately performed by the computer. [Embodiment] FIG. 1 shows an example of an implementation configuration of the present invention, which will be explained. Note that the same or equivalent parts as in FIG. 4 of FIG. 1 are given the same reference numerals. As shown in FIG. 1, each air supply hole 24 of the fixed center valve 22 in the center valve mechanism 20
A plurality of air pipes 25 are connected to an air supply source 27 via a servo valve 30, respectively. The opening degrees of the plurality of servo valves 30 are driven and controlled by a plurality of servo valve controllers 31 arranged correspondingly to each servo valve. Each servo valve controller 31 drives and controls the corresponding servo valve 30 based on a servo valve opening setting signal from the computer section 32. The computer section 32 includes a personal computer 33 that automatically sets the servo valve opening according to the type of hollow glass product, and a communication unit 34 that operates each servo valve controller 31 with a control signal from the personal computer 33. . A specific example of the operation of the above embodiment will be explained. First, data on the amount of air supplied at each of the work stations S2 to S5 in the primary and secondary air blowing areas on the rotary table 13 is determined for each of the plurality of types of hollow glass products to be molded, and from this data, data on the amount of air supplied at each work station is determined. S2～
The opening degree data of the servo valve 30 corresponding to S5 is obtained, and this opening degree data is input into the personal computer 33 by key operation and stored. Then, the personal computer 33 selects the type of hollow glass product to be molded.
is specified, the opening degree data corresponding to the specified product type is read out from the personal computer 33, and the read opening degree data is input to the corresponding servo valve controller 31 via the communication unit 34. Alternatively, the opening data is recorded on a data recording medium such as a magnetic card for each type of hollow glass product. Then, a data recording medium corresponding to the type of hollow glass product to be molded is set in the personal computer 33, and the recorded (opening degree) data of the data recording medium read by the personal computer 33 is input into the corresponding servo valve controller 31. . Each servo valve controller 31 drives and controls the corresponding servo valve 30 based on the input opening degree data, and each servo valve 30 is adjusted to a desired opening degree and maintained as it is. Such opening degree adjustment of the plurality of servo valves 30 is electrically performed all at once. As described above, after the opening degree of each servo valve 30 is automatically adjusted, the hollow glass product is continuously formed in the steps shown in FIGS. 5 to 14. When the type of hollow glass product is changed, the molding operation of the molding device is temporarily interrupted, and the opening degree data corresponding to the changed type is transmitted from the personal computer 33 to the communication unit 3.
4. The signal is sent to the servo valve controller 31, and the opening degree of the servo valve 30 is newly adjusted. [0024] According to the present invention, if the servo valve opening setting value corresponding to the type of hollow glass product is input into the computer section by an appropriate operation such as key operation, the computer A servo valve opening setting signal is output from the unit to the servo valve controller, and each servo valve controller drives and adjusts the corresponding servo valve to the desired opening at the same time, so air is supplied to the blow head in the air blowing area of the rotary table. The amount can be adjusted all at once in a short time, greatly reducing the time needed to adjust the blow air when changing the type of hollow glass product, and improving the operating rate of the molding equipment. In addition, the blow air adjustment is automatically performed by the computer based on preset data, so the blow air adjustment is always performed accurately, resulting in stable and high quality hollow glass products. It becomes easier to plan.

[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 blow-and-blow molding apparatus for hollow glass products.

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

FIG. 4 is a side view of a molding device for explaining a conventional blow air adjustment mechanism.

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 20 Center valve 24 Air supply hole 30 Servo valve 31 Servo valve controller 32 Computer Department

Claims (1)

[Claims] 1. A rotary table having a plurality of blow heads for forming hollow glass products at equal intervals around the periphery is connected to the blow head through a plurality of air supply holes of a center valve disposed in the center of the rotary table, and the blow head is connected to a predetermined work station. a blow air adjustment mechanism that supplies air at the timing when the center valve is brought in, the blow air adjustment mechanism being arranged in an air supply passage to each air supply hole of the center valve, and variably adjusting the amount of air supplied to each corresponding air supply hole; servo valve, a computer section that sets the opening degree of each servo valve according to the type of hollow glass product, and drive control of each servo valve individually based on the servo valve opening setting signal from the computer section. A blow air adjustment mechanism characterized by comprising a plurality of servo valve controllers.