JPS60235727A - Method for preventing accident in apparatus for manufacturing glass container - Google Patents

Abstract

PURPOSE:To prevent automatically the damage of a glass molding apparatus, by giving abnormality signals when signals corresponding to the respective glass sensors monitoring the respective movements of glass in manufacturing glass containers and mechanism motion sensors are in disagreement with signals of the above-mentioned respective sensors in the normal operation. CONSTITUTION:An accident in an apparatus 1 for manufacturing glass containers 17 from a gob 6 of a molten glass 3 through a parison to the glass containers 17 is prevented as follows; Thus, glass sensors monitoring the respective movements of the above-mentioned respective molded glass articles and mechanism motion sensors detecting the movements of movable parts are provided, and a check data table 5, prepared on the basis of output signals in the normal operation of the above-mentioned both sensors, and indicating ''1'' value at the time of starting and completing detection of glass is compared with signals, prepared on the basis of output signals of both sensors in the ordinary operation, and indicating ''1'' value in detecting the glass and operation of the movable parts for signals corresponding to both sensors. When both are in disagreement, abnormality signals are given to prevent the damage of the glass molding apparatus without requiring continuous monitoring by operators.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for preventing accidents in glass container manufacturing equipment, and more specifically, the present invention relates to a method for preventing accidents in glass container manufacturing equipment, and more specifically,
The present invention relates to a method for automatically detecting an abnormality when an abnormality occurs in a glass container manufacturing apparatus and taking preventive measures such as emergency shutdown.

However, in this method, the gob (molten glass lump) supplied from one glass melting furnace is sent sequentially to glass container forming machines installed in multiple sections, and molding is performed at a predetermined timing. It is a device. Typically, the operation of each molding machine is controlled by an air cylinder or air motor via a solenoid valve block. Conventionally, the opening and closing of solenoid valve blocks has been performed by a cam system using timing drums for each section driven by a common shaft.

In the case of such mechanical control, the timing must be adjusted manually by a worker, which is time-consuming and difficult to adjust while the trench is being operated. Therefore, in recent years, timing drums have been replaced by electronic timing devices that operate in a corresponding manner.

(Problem to be solved by the invention) However, even when an electronic timing device is adopted, when the gob is sent to the molding machine at a predetermined timing,
When the motion of a movable part of a molding machine is delayed from a predetermined timing due to a malfunction of a solenoid valve, etc., damage to mechanical parts and the production of defective products are likely to occur. For this reason, in the past, workers had to constantly monitor the operating status of the machine, and if the timing was off, they would take measures such as emergency shutdown of the machine. In this case, damage to the machine due to errors in judgment by workers is unavoidable, and there is also the problem of increased production costs due to labor costs.

(Object of the Invention) The present invention has been made in view of the above-mentioned problems in the technology. The purpose is to prevent this without requiring constant monitoring by personnel.

(Structure of the Invention) In order to achieve the above object, the present invention has a plurality of movable parts that operate at predetermined timings under normal conditions based on corresponding control signals. The Accident Prevention Act for Glass Container Manufacturing Equipment that manufactures containers requires a glass sensor that monitors the movement of each glass such as the cog, the parison, and the glass container, and a mechanism motion sensor that detects the motion of the i+J moving parts. A sensor is provided, and each one is created based on the output signal of the lath sensor and each mechanism motion sensor during normal operation, and one is set at the start and end of detection of the glass and the start and end of operation of the movable part. 1" value during the detection of the glass and the operation of the movable part created based on the check data table showing the 1" value and the output signal of each glass sensor and each mechanism motion sensor during normal operation. To provide a method for preventing accidents in glass container manufacturing equipment, characterized in that signals are compared for each signal corresponding to each glass sensor and each mechanism motion sensor, and if they do not match, an abnormality notification signal is generated. It is something.

(Example) The present invention will be described below with reference to the drawings.

FIG. 1 shows the main parts of an RS-type glass container manufacturing apparatus 1. As shown in FIG. 2 is the forehearth of the glass melting furnace.
6, the molten glass 3 flows down from the lower outflow hole of the forehearth 2 and becomes a molten glass flow 4.
Reference numeral 5 denotes a shear which operates at a fixed timing and cuts the molten glass flow 4 to form gobs 6 of a predetermined length. The RyoPro has an upper guide cylinder 7 and a glass container forming machine 12 with a corresponding specific section S (in this case, it is referred to as 1 section Sl).
guided by. The glass container forming machine 12 is equipped with a PIJson forming section 13, an invert mechanism 14 for transferring the parison 16 (FIG. 2(C)) to a finishing forming section 15, and a finishing forming section 15.

Downstream of the finishing forming section 15, there is a takeout 18 for taking out the glass container 17 (FIG. 2(f)) from the finishing forming section 15 and placing it on the dead plate 22, and a takeout 18 for taking out the glass container 17 (FIG. 2(f)) from the finishing forming section 15 and placing it on the dead plate 22. A sweeper 19 is provided for sweeping out the conveyor belt 17 in the direction of arrow B and sending it out onto a conveyor 20 moving in the direction of arrow C.

21 is a goblin ect, and the gob 6 is attached to the upper guide tube 7.
If the gobs become clogged due to an accident, the upper guide cylinder 7 is removed and these gobs are discharged into the discharge chute 23. The Skoog 9 is configured to move in the direction of the arrow A at predetermined timing to distribute the gobs 6 to the guides 10 of each section S, -n (other than the Al station S1 is not shown). In other words, copro is supplied to each section S each time the scoop 9 moves one cycle.

Note that the foreground 2 is usually provided with a plurality of (for example, four) outflow holes, and a plurality of copies are cut and formed at the same time.
A plurality of glass container forming machines 12 etc. are also provided in each section, and a plurality of glass containers 17 are simultaneously formed in each section, but in the following explanation, for the sake of simplicity, A case will be described in which one copy program is supplied to each section S at a time.

FIG. 2 shows the molding process using a glass container molding machine. As shown in FIG. 2(a), when the assembly mold 25 of the parison molding section 13 is closed, the funnel 26 is placed on the assembly mold 25, and the silane gloss 27 is in the raised position, the guide 11 moves the co-protrusion. falls through the funnel 26 and is supplied into the mold 25. Figure 2(b) immediately
As shown in FIG. 2, a baffle 28 is placed on the funnel 26, and pressurized air 29 is introduced from above into the mold 25 through the guide hole 28a, pressing the gob and releasing the neck ring 3.
0, the outer surface 17a of the mouth and neck of the glass container (FIG. 2(f)
) is formed.

Next, the funnel 26 is removed, the baffle 28 is placed directly on the mold 25, and at the same time the silane 27 is lowered, and the pressurized air 31 is introduced from below through the holes in the silane 27 into the mold 25. As a result, the resin 16 is formed (FIG. 2(C)). Next, the baffle 28 rises, the mold 25 opens, and the jason 16, whose mouth and neck are held by the neck ring 3o, is inserted into the finishing molding section 15 by the rotation of the invert mechanism 14 (see Fig. 2). (d)).

Immediately, the neck ring 3o opens and the invert mechanism 14 is reverted to its original position. Meanwhile, the blow head 32 is placed on the finishing mold 33, and pressurized air 34 is sent into the parison 16 from the scoop 32a to blow the glass. container 1
7 is formed (FIG. 2(e)). Next, blow to rad 3
2 rises, the finishing mold 33 opens, and the mouth and neck part 17a of the container 17 is formed by the grits and -1, 8a of the take-out 18.
is invited, pulled up from the bottom mold 35, and placed on the detsolate 36 (FIG. 1). Each movable part performs the above operation with 360 degrees as one unit (360 degrees is, for example, 5
(equivalent to seconds), each cycle is repeated at a specified timing.

In the above molding process, a laser sensor (usually a photoelectric sensor) is provided to monitor the movement of the glass, such as a copro. These include a gob detector Gl that detects the fall of the gob 6 directly below the upper guide cylinder 7 shown in FIG. , Noj
A sensor invert sensor G3 detects when the container 16 is inverted by the finish molding machine 15, and a sweep out sensor G4 detects when the glass container 17 is moved out.

On the other hand, a main movable part of the glass container forming machine 12 (usually of the proximity switch type) is provided.

These are the assembly mold sensor 27 that monitors the opening and closing of the assembly mold 25.
An inverter sensor M for the inverter 1 mechanism 14 monitors the vertical movement of the plantar sensor M4.

A cleaning sensor M6 monitors the opening and closing of the neck ring 30, and a finishing mold sensor M monitors the opening and closing of the finishing mold 33.
7. Blow Rad Sensor M8 for Blow R32
, and takeout sensor M9 for takeout-J&]-8 (see FIG. 3).

FIG. 3 shows a computer-based control system of the glass container manufacturing apparatus 1 equipped with each of the above-mentioned sensors. 4 ] a, 4 l b, 41 c,
-41n is each sex wr7S+ ls2 1S3
, -8n, and is connected to the main computer 40. The computer controller 41a (the same applies to the computers below 41b) issues commands to the solenoid valve block 42 via the console 38 according to a predetermined program, and controls each solenoid valve in the solenoid valve block 42. actuates the air cylinder or air motor for the corresponding movable part (eg, mold assembly 25, etc.) to move the movable part. 7 each
The operation signals of the corresponding movable parts detected by the sensors M1 to M9 are digitally converted by the interface circuit 43 as shown in the example below, and then input to the section computer 41a. Similarly, (1) of the glass sensors G2 +G3 +G4 is also input to the section computer 41a.However, since the gob detector Gl detects the gobs supplied to all sections S, ..., the detection signal is transmitted to the interface After passing through the circuit 39 and inputting it to the main computer 40, it is inputted to the section computer 41x that controls the section Sx to which the gob 6 is supplied.

4 and 5 show an example of the relationship between the operation of the takeout 18 and its detection signal. Figure 4 (-) shows that the piston ring 4 has descended to the bottom dead center, and the rack -
The grip P-18a is shown gripping the glass container 17 via the gear mechanism 18c, a mechanism (not shown), and a pneumatic mechanism.

In this state, the piston port, the uppermost bin P attached to the door 44, faces the takeout sensor M9, and the signal 45a shown in FIG. 5(,) is outputted from the sensor M9. Next, while Bistoy 4 rises to top dead center,
As shown in Figure 4(b), Grit e-13a is empty.
After lifting the glass container 17, the arm 18b rotates to move the glass container 17 slightly above the dead grate 22, and the glass container 17 is temporarily held in this state in order to cool the bottom thereof. In this state, the lowest bin P3 faces the sensor M9, and the signal 45c shown in FIG. 5(a) is output. In addition, during the above-mentioned upward movement, the bin P2 is connected to the sensor M9.
A signal 45b1 is output when facing the . "22 Next, as shown in FIG. 4(C), the piston 44
The glass container 17 is placed on the dead plate 22, and the glass container 17 is placed on the dead plate 22, and the glass container 17 is placed on the dead plate 22.
The grip on 1-18& is released.

In this state, the signal 45b2 shown in FIG. 5 (-) is output.

Next, the motor 4 descends to the position shown in FIG. 4 (-), that is, to the bottom dead center, and repeats the above operation. As described above, this operation is repeated in machine cycles in which 360 degrees is one unit.

The interface circuit 43 outputs a signal 45a.

9.45 Convert b2 into a rectangular wave signal 46 as shown in FIG. , the upper level signal 46x has a value of 0'', the lower level signal 46y
Digital transformation m is performed so that the value becomes 1". The output signals of other machine sensors M, .about.8 are also subjected to similar digital transformation and then input to the section computer 41a.

The output signals (rectangular wave signals) of the glass sensors G and ~4 are also controlled by the interface circuits 39 and 43 to have a value of 1# during the period when the glass such as the gob passes through the position facing each sensor, in the same manner as described above. , other times are digitally converted to have a value of 0'', and then the main computer 4o
Or input it to the section computer 41a.

Next, through the learning system console 38, based on the rectangular wave signal (for example, signal 46) of each sensor during normal operation,
Create a check data table and use it on the main computer 4.
0 (in case of sensor Gl) and memory to section computer 41a.

Then, as described in the example below, based on the check data table, it is checked whether the work is being performed at the normal timing or not. If the work is not being performed, an abnormality notification signal is immediately issued and the machine is brought to an emergency stop. Carry out emergency procedures such as

An example of creating a check data table will be explained with reference to FIG.

The pulse signal 47 shown in FIG. 5(c), that is, the check signal, is the basis of the check data table, and the starting point or ending point of the signal 46 is XI + x2+
X3 IX4 r x51
p4 + Even if there is a slight slowness corresponding to the above width at the start or end of the movement of the movable member, for example the piston 44 of the takeout 18, it will not have a negative effect on the work, and on the other hand, the width (
In other words, if there is no tolerance at all, the number of emergency stops will increase unnecessarily and work efficiency will decrease. On the check data table, the time points corresponding to Noyals p1 to p8 have a "1" value, and the time points of that pond have a 0'' value.

FIG. 6 shows an example of a check data table created based on the output signals of each sensor during normal operation as described above.

During actual work, a malfunction of a particular solenoid valve in the solenoid valve block 42 may cause a delay in the movement of the movable part operated by that solenoid valve, or - e The shaping of the mouth and neck of the IJ son 16 may be incomplete. , during invert・P Linno 16
came off the neck ring 30 and fell off the neck ring 30.
6 may not be detected by the sensor G3.

Examples of methods for checking these abnormal situations will be described below.

In FIG. 7, the circuit 60 connects each sensor G, to G 4 r
A square wave signal 48 (based on the output signals of M1 to M9)
For example, the state change (46) in Figure 5 ('° Bi value and ``0'' 0
'' value) for each timing angle, and compare the 111# value when there is a state change and the On value when there is no change with the state value at the relevant timing angle in the check data table 50, and if they do not match. is an abnormality notification signal (“1”
It is a circuit that emits the OR gate 51, AND
It is equipped with a dart 52, an Ixclune loop 011"-t 53 and an 0R) lA-t 54.

To explain more specifically, for example, as shown in FIG. 8, if the starting time point Xl of the peak of the piston 74 of the takeout 18 is delayed and is not on the line p1, the OR gate is applied at the time point xI. 5] output “1” is AN
Input to D gate 52. On the other hand, since the "0" value from the check data table 50 is input to the AND gate 52, A
The output of the ND dart 52 becomes 0#. Therefore, IxClugeypORDart53 has a value of "1" and "o".
” Since the value is input, its output will be 1 and therefore O
The output of the R gate 54 also becomes "l" and an abnormality notification signal is issued.

On the other hand, the circuit 61 detects the state change corresponding to each sensor in the check data table 50 at each timing angle, and compares it with the state change of the rectangular wave signal 48 at the timing angle. signal 4
This circuit inputs an abnormality notification signal (" ] " value) to the OR dirt 54 when there is a lack of a state change of 8, and is provided with a frizzo-frozzo circuit 55 and a palm gate 56.

To explain more specifically, for example, if the piston ``''; ¥4 of the takeout 18 breaks down and stops, there will be no change in the state of the ``1 signal 46'' as shown in FIG. In the case check signal 47, at the time point Zl when the gurus pi occurs, the frizz-free tsuno circuit 5
5 is set to a '1' value, and the AND gate 56 is set to 1.
# Since two values are input, the output will be "1", O
The value "al" is input to the R dart 54. Therefore, in this case, an abnormality notification signal is issued from the OR gate 54.

As shown in FIG. 5, the descent starting point x of the piston μ14
1 is located on the gurus p+ and normal work is being performed, in the circuit 60, both of the two human forces applied to the AND dirt 52 have a ul" value, and the output is 1". . Therefore, the two-person input to the Ixcrugeive OR Dart is also a '1' value, and its output is '0', so the O value is input to the OR gate 54. On the other hand, in the circuit 61, the Furi, Zoflotsuno circuit 55 is “
Since a 1" value is input and reset, and a "0" value is sent, a "0" value is input to the AND dart 56.

The pond input of AND dart 56 should change state more often than the check table, so its input is I n,
The input to the OR gate 54 is aO''. Therefore, the output Fi from the OR gate 54 is 0'' and no abnormality notification signal is generated.

The above circuits 60 and 61 are connected to the section computer 41
8, and when the OR gate 54 outputs a value of "1", the electric output from the combination a to the solenoid valve is immediately changed to a stop state signal, and each operating part is brought to an emergency stop. do. However, the circuit 60 for gob detector G.
A circuit corresponding to 61 is attached to the main computer 40, and when the OR gate 54 outputs '1', the collision reject 21 is activated by an air circuit (not shown) to remove the clogged upper guide tube. 7 and eject sheet 23.
Gob is ejected through. In this case, the glass container molding machine may be suddenly stopped at the same time, or it may continue to run idle.

It goes without saying that the present invention is not limited to the above examples, but can also be applied to, for example, a Type 18 glass manufacturing apparatus in which a plurality of gobs 6 are simultaneously supplied to each section. It can also be applied to a Breath-Pro one-type glass container molding machine.

(Effects of the Invention) According to the present invention, damage to IS-type glass container manufacturing equipment and generation of defective products due to timing deviations in the movement of gobs and the motion of the glass container forming machine can be automatically and reliably prevented. It has the effect of being able to prevent this without requiring constant monitoring by personnel.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of an example of an I3 type glass container manufacturing apparatus;
Figure 2 (a) l (b), (c), (d)
, (e) and (f) are drawings showing the process of molding a glass container by the glass container molding machine in No. 1 to 1, and Fig. 2 (,) shows the state in which the cob enters the parison molding section. FIG. 2(b) is a vertical sectional view showing the state immediately after the outer surface of the mouth and neck of the glass container is formed by the rinsing molding part, and FIG. A vertical section and a side view showing the condition, Figure 2 (a) is i? 1J Sonsuke A vertical cross-sectional view showing the state in which the glass container is loaded into the finishing molding section, Figure 2 (,) is a vertical cross-sectional view showing the state in which the molding of the glass container has been completed, and Figure 2 (f) is the glass container taken out. 3 is a front view showing a state in which the glass container manufacturing apparatus shown in FIG. 1 is electronically controlled by the method of the present invention;
FIG. 4 is a schematic front view showing the operation of taking out the glass container by the take-out process shown in FIG.
,) is a diagram showing a state in which a glass container is placed on a dead flat rate, FIG. b
) is a diagram showing a rectangular wave signal created based on FIG. 5(,), and FIG. 5(c) is a diagram for the takeout check data table created based on the signal in FIG. 5(b). A line diagram showing check signals, FIG. 6 is a front page showing an example of a check data table corresponding to each sensor, and FIG. 8 and 9 are circuit diagrams illustrating an example of a method for outputting an abnormality notification signal when a timing error occurs in the glass container manufacturing apparatus shown in FIG. 1.
The figure is a diagram showing the relationship between the sensor's rectangular wave island removal signal and the check signal when an abnormality occurs in the operation of the piston in the takeout of FIG. 1. 1.Is-type glass container manufacturing equipment, 6...Cop, 1
4... Invert mechanism (movable part), 16... Recliner, 17... Glass container, 25... Assembly type (movable part) 26... Funnel (movable part), 27... Silan gloss (movable part) ), 28...buckle (movable part)
, 30... Neck ring (movable part), 32... Plow head (movable part), 33... Finishing mold (movable part)
, 44... (takeout) piste ÷% moving parts)
, 45...output signal, 47...check signal, 5o...
...Check data table, GI...Gob detector (glass signal), G2...Gob arrival sensor (glass sensor), G3...Parison invert sensor (glass sensor) NG4 Sween-out sensor ( Glass sensor), Ml... assembled type Moyon sensor (mechanism Moyon sensor), M2 ・
Funnel motion sensor (〃), Mjiburu Juru
Motion sensor (〃), M4・Silant gloss motion sensor (〃), M5... Inverter motion sensor (〃), M6... Neck ring motion sensor (〃), Ml... Finished motion sensor ( 〃
L'M8...Blow motion sensor (mechanism motion sensor), M9...Takeout motion sensor (〃), X
l +X2 +X3 +X4 +XS +X6 +X7
+X8 ''The start and end points of the piston rod (movable part). Fig. 1 (C) (e) (d) (f) Fig. 4 (C)

Claims (1)

[Claims] (1) Glass container manufacturing equipment that manufactures glass containers from gobs of molten glass through solisons by operating multiple movable parts at predetermined timings under normal conditions based on corresponding control signals. The Accident Prevention Act stipulates that a glass sensor to monitor the movement of glass in the cup, glass container, glass container, etc., and a mechanism motion sensor to detect the motion of the movable parts must be installed in each case. Checks are created based on the output signals of the glass sensor and each mechanism motion sensor during normal operation, and show a value of 1" at the start and end of detection of the glass and the start and end of operation of the movable part. , a signal indicating the II II II value during the detection of the glass and the operation of the movable part, which is created based on the data table and the output signals of each glass sensor and each mechanism motion sensor during normal operation. A method for preventing accidents in a glass container manufacturing apparatus, characterized in that signals corresponding to each glass sensor and each mechanism motion sensor are compared, and if they do not match, an abnormality notification signal is generated.