WO2013014782A1

WO2013014782A1 - Method and device for monitoring gob arrival timing in i.s. molding machine

Info

Publication number: WO2013014782A1
Application number: PCT/JP2011/067224
Authority: WO
Inventors: 康一赤路; 達雄林
Original assignee: 東洋ガラス株式会社
Priority date: 2011-07-28
Filing date: 2011-07-28
Publication date: 2013-01-31
Also published as: JP4999032B1; JPWO2013014782A1

Abstract

In order to accurately detect the timing at which a gob arrives at a rough mold and to reliably reject defective products produced as a result of deviation in arrival timing, a laser sensor is arranged in a manner such that the optical axis passes through the passage of the gob between the exit of a deflector and a rough mold in each section of an I.S. molding machine. A processing means that processes the light blockage signal of the laser sensor detects the gob arrival timing in each section on the basis of the light blockage signal of the laser sensor, and actuates a rejection means to reject the molded product made from said gob if said arrival timing is outside a predetermined range.

Description

Method and apparatus for monitoring gob arrival timing of IS molding machine

The present invention relates to a method and an apparatus for monitoring the arrival timing of a gob to be charged into a rough mold when a glass molded product such as a glass bottle is manufactured in large quantities with an IS molding machine.

Glass molding by IS molding machine is a gob distribution means that sends glass gob to the rough mold of each section, a rough mold that molds the parison from the gob, a transport means that transports the parison from the rough mold to the finishing mold, and a final molded product blown from the parison This is performed by a finishing mold to be molded, take-out means for taking out the molded product from the finishing mold and moving it onto a conveyor, and the molded product is gradually cooled through a slow cooling furnace while being conveyed on the conveyor.

FIG. 1 is an explanatory diagram of the gob distribution system. The spout 20 filled with the molten glass 25 is equipped with a rotating tube 23 and a plunger 24 that moves up and down, and when the plunger 24 descends and the molten glass 25 is pushed out of the orifice 21, the shear 22 is activated. And the gob 4 is cut off and dropped. The fallen gob 4 is supplied into the rough mold 11 through gob distribution means comprising an upper funnel 30, a lower funnel 31, a scoop 32, a trough 33 and a deflector 34. The trough 33, the deflector 34, and the mold 11 are provided for each of a plurality of sections of the molding machine, and the scoop 32 sequentially supplies the gob to each mold of the plurality of sections while changing the direction.

The timing when the gob arrives in the rough mold is important. If this timing is not stable, various defects such as a scratch on the mouth of the bottle tend to occur. In the following Patent Document 1, due to the time difference between the output of the first sensor that detects that the molten glass has been cut by the shear and the output of the second sensor that detects that the cut gob has passed through the upper funnel outlet, An apparatus for detecting an abnormality of a gob falling is disclosed.

Patent Document 2 listed below discloses an apparatus that detects a defective gob mixed with foreign matter or bubbles, eliminates the defective gob, or excludes a molded product formed with the defective gob.

Japanese Patent No. 2676471 Japanese Patent No. 4700141

Although the technology of Patent Document 1 can detect a significant delay in the gob due to abnormalities at the time of cutting or a gob clogging in the upper funnel, it has not been able to accurately know when the gob arrives in the rough mold. .

In the above-mentioned Patent Document 1, defective products can be eliminated by detecting defective gobs, but defective products due to poor arrival timing of gobs to the rough mold cannot be detected.

An object of the present invention is to accurately detect the arrival timing of a gob to a rough mold and to reliably eliminate defective products caused by the arrival timing error. Inventive device configurations can be added.

[Claim 1]
The present invention is based on a laser sensor in which an optical axis passes through a gob passage between a deflector exit of each section and a rough mold, processing means for processing a light shielding signal of the laser sensor, and an exclusion signal output from the processing means. Providing an exclusion means for eliminating the molded article;
The processing means detecting the arrival timing of the gob in each section based on the light shielding signal of the laser sensor;
When the arrival timing is out of a predetermined range, the processing means outputs the exclusion signal;
A method for monitoring a gob arrival timing of an IS molding machine, characterized in that, based on the rejection signal, the exclusion means includes a step of rejecting a molded product of the gob.

Since the arrival timing of the gob is detected between the deflector exit and the rough mold, the arrival timing of the gob to the rough mold can be detected accurately. Further, since the laser sensor is arranged so that the optical axis passes through the gob passage of each section, the arrival timing of the gob of all sections can be detected by one set of laser sensors.

[Claim 2]
The present invention also provides a laser sensor disposed so that an optical axis passes through a gob passage between a deflector exit of each section and a rough mold, processing means for processing a light shielding signal of the laser sensor, and the processing means outputs An exclusion means for eliminating the molded product based on the exclusion signal;
The processing means detects the arrival timing of the gob in each section based on the light shielding signal of the laser sensor, and outputs the exclusion signal when the arrival timing is out of a predetermined range,
The exclusion means is a gob arrival timing monitoring apparatus for an IS molding machine, wherein the gob molded product is excluded based on an exclusion signal from the processing means.

This invention is an apparatus for monitoring the gob arrival timing of an IS molding machine using the method of claim 1.

[Claim 3]
The present invention is the gob arrival timing monitoring device according to claim 2, wherein the processing means has a monitor screen, and the arrival timing of the gob in each section is displayed on the monitor screen.

 By displaying the gob arrival timing in each section on the monitor screen, it is possible to know the trend of the gob arrival timing in each section.

[Claim 4]
Further, in the present invention, the laser sensors are provided in two upper and lower stages, and the processing means calculates a gob speed from a time difference in which the gob shields the upper and lower laser sensors, and displays the gob speed on a monitor screen. The gob arrival timing monitoring device according to 2 or 3.

The laser sensor is provided in two upper and lower stages, and the gob speed can be accurately calculated from the time difference in which the gob shields the upper and lower laser sensors. By displaying the gob speed on the monitor screen, it is possible to know whether the gob distributing means is functioning normally.

[Claim 5]
Further, according to the present invention, the processing means calculates the gob length from the light shielding time of the light shielding signal of the laser sensor and the gob speed, and displays the gob length on the monitor screen. It is a monitoring device.

The gob length can be calculated by multiplying the gob speed when passing the optical axis of the laser sensor by the light shielding time of the light shielding signal of the laser sensor. By displaying the gob length, it is possible to know to some extent whether the shape of the gob is normal.

The gob arrival timing monitoring method and apparatus of the present invention can accurately detect the arrival timing of the gob to the rough mold, and can reliably eliminate defective products caused by the arrival timing error.

It is a schematic diagram after a gob is cut out until it is supplied in a rough mold. It is a front view of the deflector of each section, and a rough type. It is a top view of the deflector of each section, and a rough type. It is a top view of the deflector of each section, and a rough type. It is a flowchart in a processing means. It is explanatory drawing of gob fall speed calculation. It is explanatory drawing of the length calculation of a gob. It is an example of a display screen. It is explanatory drawing until the molded article shape | molded with the molding machine enters into a slow cooling furnace.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, the IS molding machine 1 has eight sections from section (1) to section (8), and each section has a rough die 11, a finishing die (not shown), and a parison from the rough die to the finishing die. It has a transfer means (not shown) for transferring.

2 and 3 show the positional relationship between the deflector 34 and the rough mold 11 in each section (1) to (8), FIG. 2 is a front view, and FIG. 3 is a plan view. The

laser sensors

5 and 6 are arranged in two upper and lower stages so that the optical axis passes through the gob passage between the exit of the deflector 34 and the rough mold 11 in each section (1) to (8). The

laser sensors

5 and 6 include

projectors

5a and 6a that project red laser light having a wavelength of 0.65 μm, and

light receivers

5b and 6b that receive the light. In each section, the laser beam from the

laser sensors

5 and 6 is shielded while the gob 4 exits the deflector 34 and falls into the rough mold 11, and the timing when the gob passes is detected. Note that knowing the gob passage timing substantially knows the timing at which the gob arrives in the rough mold.

FIG. 4 is a plan view in which each section has two rough molds 11 and two finishing molds (not shown) (A cavity and B cavity). In each section (1) to (8), Molding is simultaneously performed in the A cavities (1A) to (8A) and the B cavities (1B) to (8B). In this case, the laser sensor is provided in two stages each for the A cavity and the B cavity.

The light shielding signal when the gob shields the laser light from the laser sensor is sent to the processing means and processed. The processing means is an information processing apparatus such as a personal computer, to which a monitor is connected.

FIG. 5 is a flowchart of the operation of the processing means. The outline of the processing in the processing means will be described with reference to FIG.
Step 101... Read the “angle” from the timing signal output by the control system attached to the IS molding machine by reading the angle of the IS molding machine. In the IS molding machine, one cycle (one cycle in which molding is completed once in all sections) is set to 0 ° to 360 °, and each part of the molding machine operates at a predetermined “angle” timing. Therefore, by reading the “angle” of the IS molding machine, it is possible to know where the IS molding machine is currently located in one cycle.

Step 102... Is it a predetermined angle range?
Thus, it is determined whether or not the present is within a predetermined angle range of the IS molding machine. If YES, the process proceeds to step 103, and if NO, the process returns to step 101.
Here, the “predetermined angle range” is a predetermined timing (angle range) at which the light shielding signal of the laser sensor should be read. In the case of an 8-section IS molding machine, molding in each section is usually performed in the following order. The numbers in parentheses are section numbers.
(1) → (2) → (5) → (3) → (6) → (7) → (8) → (4)
In this order, the offset angle in each section (the angle serving as the reference for the operation timing in each section) is shifted by 360 ° / 8 sections = 45 °. If the angle of the IS machine is 0 ° and the offset angle of the section (1) is 0 °, the offset angle of each section is as shown in Table 1. The offset angle of each section is 0 ° when the gob arrives in the rough mold.

In this case, the “predetermined angle range” can be determined as shown in Table 2, for example.

Step 103 .... Is the sensor shielded from light?
Thus, it is determined whether the sensor is shielded from light. If YES, the process proceeds to step 104, and if NO, the process returns to step 101.

Step 104... The measurement of the light shielding timing of each of the

laser sensors

5 and 6 and the end of light shielding are measured by measuring the light shielding timing of the sensor.

For example, if the angle read in step 101 is 350 ° to 359.9 °, the process proceeds to step 103. When the sensor is shielded from light, the shielding timing of the sensor is measured in step 104. Gob of section (1).
If the angle read in step 101 is 35 ° to 44.9 °, the process proceeds to step 103. When the sensor is shielded from light, the light shielding timing of the sensor is measured in step 104. Gob of section (2).
For example, the laser sensor may be shielded from light by a worker's swab work or the like, but the processing means does not detect a light shielding signal outside the range of the IS molding machine reading angle in Table 2.

afterwards,
Step 105... The gob fall speed is calculated by the fall speed calculation. FIG. 6 is an explanatory diagram of calculating the gob falling speed. The time difference between the start of light shielding between the laser sensor 5 and the laser sensor 6 when the falling gob 4 shields the laser light from the laser sensors 5 and 6 (in FIG. 6, the gob 4 moves from the solid line position to the chain line position. (Time) is t, and the difference in height between the laser sensor 5 and the laser sensor 6 is h, the gob speed (average speed between the laser sensors 5 and 6) v is
v = h / t
Is required.

afterwards,
Step 106... The length of the gob is calculated by calculating the length of the gob. FIG. 7 is an explanatory diagram for calculating the length of the gob. If the time when the gob 4 shields the laser sensor 5 or 6 (the time when the gob 4 moves from the position of the solid line to the position of the chain line in FIG. 7) is T, and the speed of the gob calculated at step 104 is v, the length of the gob L is
L = vT
Is required.

afterwards,
Step 107... Desired data is displayed on the monitor screen by screen display. FIG. 8 is an example of a display screen. For each of the A and B cavities, the data for sections 1-8 are displayed. “Falling timing (degree)” is determined by setting the angle of the IS molding machine read in step 101 to the offset angle of the section when the light shielding disclosure time and the light shielding end time of each of the

laser sensors

5 and 6 are measured in step 104. The converted angle. “Length (mm)” is the gob length calculated in step 106. “Speed (mm / s)” is the drop speed calculated in step 105. The “allowable drop timing (degree)” is a threshold value that allows the “drop timing (degree)” to be arbitrarily set. “Exclusion” is turned on when “fall timing (degree)” is out of the range of “allowable fall timing (degree)”, and indicates that a molded product molded with the gob is excluded.

afterwards,
Step 108... Is it within the allowable timing range?
In the case of YES, the process returns to step 101, and in the case of NO,

Step 109 ············· Preparation to exclude the molded product formed by the gob whose “falling timing (degree)” is out of the range of “allowable falling timing (degree)” by the preparation for exclusion. In addition, an alarm can be sounded as necessary. After preparing for exclusion in step 109, the process returns to step 101.

FIG. 9 shows how the molded product 7 (glass bottle) molded by the molding machine 1 enters the slow cooling furnace 16. In this case, the IS molding machine 1 has eight sections from the first section to the eighth section (numbers in parentheses in FIG. 9 represent section numbers), and the first section is the most downstream side of the conveyor 12, The eighth section is the most upstream side.
As shown in FIG. 1, the gob is inserted into a rough mold of the IS molding machine 1, and parison molding and finish molding are performed in the molding machine, and the molded product 7 is directed to the slow cooling furnace 16 on the conveyor 12. And is fed into the slow cooling furnace 16 by the pusher 15.
The rejector 13 is provided beside the conveyor 12 between the IS molding machine 1 and the slow cooling furnace 16.
If the processing means determines NO in step 108 (preparation for rejection), the processing means sends an exclusion signal to the rejector 13 at the timing when the molded product 7 molded from the gob is conveyed to the front of the rejector 13, and the rejector 13 is The molded product is blown off toward the disposal unit 14 and removed from the conveyor 12. Any type of rejector can be used, such as a type that blows away glass products on a conveyor with air or a type that extrudes.

DESCRIPTION OF SYMBOLS 1 Molding machine 11 Rough type 12 Conveyor 13 Rejector 14 Disposal part 15 Pusher 16 Slow cooling furnace 20 Spout 21 Orifice 22 Shear 23 Tube 24 Plunger 25 Molten glass 30 Upper funnel 31 Lower funnel 32 Scoop 33 Trough 34 Deflector 4 Laser sensor 5 Gob 5 Laser sensor Laser Light emitter 5b Laser sensor light receiver 6 Laser sensor 6a Laser sensor light emitter 6b Laser sensor light receiver 7 Molded product

Claims

A laser sensor in which the optical axis passes through the gob path between the deflector exit of each section and the rough mold, a processing means for processing the light shielding signal of the laser sensor, and an exclusion signal output by the processing means are excluded. Preparing an exclusion means to perform,
The processing means detecting the arrival timing of the gob in each section based on the light shielding signal of the laser sensor;
When the arrival timing is out of a predetermined range, the processing means outputs the exclusion signal;
A gob arrival timing monitoring method for an IS molding machine, characterized in that, based on the exclusion signal, the exclusion means excludes the gob molded product.
Based on the laser sensor arranged so that the optical axis passes through the gob path between the deflector exit of each section and the rough mold, the processing means for processing the light shielding signal of the laser sensor, and the exclusion signal output by the processing means An exclusion means for eliminating the molded product;
The processing means detects the arrival timing of the gob in each section based on the light shielding signal of the laser sensor, and outputs the exclusion signal when the arrival timing is out of a predetermined range,
The gob arrival timing monitoring apparatus for an IS molding machine, wherein the exclusion means excludes the gob molded product based on an exclusion signal from the processing means.
The gob arrival timing monitoring device according to claim 2, wherein the processing means has a monitor screen and displays the arrival timing of the gob in each section on the monitor screen.
The said laser sensor is provided in 2 steps | paragraphs of upper and lower sides, The said process means calculates gob speed | velocity | rate from the time difference when a gob shields this upper and lower laser sensor, and displays this gob speed | velocity | rate on a monitor screen. Gob arrival timing monitoring device.
The gob arrival timing monitoring device according to claim 4, wherein the processing means calculates a gob length from a light shielding time of the light shielding signal of the laser sensor and the gob speed, and displays the gob length on a monitor screen.