JPH0133619Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a parison detection mechanism for a hollow glass article blowing device. The present invention relates to a parison detection mechanism configured to detect radiant heat emitted from the parison using infrared detection sensors, determine whether the parison shape is good or bad, and automatically discharge defective parisons.

[Technical background and problems of the invention]

Conventionally, when manufacturing hollow glass articles such as light bulbs, the molten glass taken out of the glass melting furnace is first received in a blank mold and formed into a predetermined glass lump, and the still soft glass lump is transferred to an orifice plate. In this process, a blow head is pressed against the glass from above and air is blown into the mold to inflate and form the glass. It is known that it has a very important effect on quality during molding.

However, in the prior art, the quality of the parison shape has been left solely to the visual judgment of an operator due to problems with the location of the hollow glass article blowing device, maintenance and accuracy problems with the detection sensor, and so on. Therefore, there were individual differences in the judgment of parison length, which is particularly important, among workers, and it was also inaccurate. Therefore, the rate of defective products in the final inspection process is high, and feedback to the production process is slow, which is a major hindrance to improving quality and saving labor through equipment automation.

[Purpose of invention]

This idea was made in consideration of the above circumstances,
The object of the present invention is to provide a parison detection mechanism that automatically measures the parison shape of a hollow glass article blowing device, determines its quality, and automatically discharges defective parisons.

[Summary of the idea]

In order to achieve the above objectives, this invention uses multiple infrared detection sensors to detect the radiant heat emitted from the parison, and includes a calculation mechanism that determines the quality of the particularly important length of the parison shape, and a calculation mechanism that ejects defective parisons. This parison detection mechanism is equipped with a calculation mechanism for shifting an output signal for a predetermined period of time, and has means for automatically discharging defective parisons.

[Example of idea]

Next, the present invention will be explained in detail based on illustrated embodiments.
The drawings are a block diagram showing the configuration of the parison detection mechanism of the present invention and a side view of the main parts around the parison. 1 is the molten glass (parison) hanging down from the orifice plate, 2 is the blowing mold, 3
4 is a parison position detection sensor, and 4 is a hood that limits the field of view of the parison shape detection sensor and protects the sensor head from external disturbances. 5 is a parison shape detection sensor head using an optical fiber type infrared detection sensor, 6 and 7 are sensor signal amplification converters for 5 and 3, respectively, 8 is a parison shape determination section, and 9 is a sensor head for detecting the signals of 7 and 8. This is a phase adjustment section that adjusts time lag. 10 is a raw data display section; 11 to 15 are shift calculation mechanisms for discharging defective parisons after a predetermined time delay;
1 is a shift calculation section, 12 is a shift number setting section, 13
14 is a shift data display section, and 15 is a defective parison discharge output amplifying section, which are connected to the electromagnetic valve of the defective parison discharge section 16.

Next, the operation of the parison detection device configured as described above will be explained. The radiant heat emitted by the parison 1 is detected by two upper and lower infrared detection sensors 5 to which a hood 4 is attached. That is, the field of view is limited to only that position by the infrared detection sensor 5 attached to the hood 4, and the parison length is determined by the ON or OFF states of the upper and lower two-stage sensors while being protected from external disturbances. If you set the parison so that the upper sensor is ON and the lower sensor is OFF when the parison is of the appropriate length, if the upper sensor is ON and the lower sensor is OFF, it is a good product. If both sensors are ON, the parison is too long and the product is defective. If both the upper and lower sensors are OFF, the parison is too short and the product is defective. The analog signal from the infrared detection sensor 5 is input to a signal amplification converter 6, and the converted digital ON/OFF signal is input to a parison length determination section 8 to determine whether it is good or bad. Further, the signal obtained by the parison detection timing detection sensor 3 is for allowing the parison length determination unit 8 to receive the output signal of the infrared detection sensor only when the parison has turned to a predetermined position. is also input to the phase adjustment section 9 via the amplification converter 7. In addition, the detection timing signals converted to ON and OFF digital signals are sent to 7 and 8 in the phase adjustment section 9.
After adjusting the time lag of the signal, it is also used as a clock pulse for the shift section 11. Phase adjustment section 9
The signal output from the raw data display unit 10 confirms and displays the length of the parison, and at the same time is input to the shift calculation unit 11. The position at which the parison length is detected and the position at which the defective parison is ejected may be located at a distance, and are set to be output after the defective parison ejection signal has been shifted several times. Furthermore, it is possible to set the output time taking into consideration the responsiveness of the discharge section. Reference numerals 11 to 15 in the drawing indicate parts for performing the above-mentioned ejection operation of the defective parison. When the shift calculation unit 11 receives the parison length pass/fail signal, it shifts the signal by the number set by the shift number setting unit 12 in a shift circuit, and when the shift number reaches the set position, The discharge output signal continues to be sent for the time set by the defective parison discharge time setting section 13. The output of this signal is amplified by the defective parison discharge output amplification section 15,
The signal is input to the solenoid valve of the defective parison discharge section 16.
Further, the data of the shift calculation section 11 is displayed on the shift data display section 14 for confirmation.

As described in detail above, according to the present invention, the length of the parison can be automatically measured using an infrared detection sensor, the attached calculation mechanism can determine whether the parison is good or bad, and the defective parison can be automatically ejected. .

It should be noted that the present invention is not limited to the above-described embodiments, and instead of a spot-type infrared detection sensor, a sensor that detects infrared wavelengths, such as a sensor that detects infrared wavelengths, may be used.
It is also possible to quantify the parison length using a CCD image sensor or the like, and to perform this in combination with a data processing device.

Furthermore, the present invention is not limited to only detecting the length of the parison, but can also be applied to detect the shape of the parison and the presence or absence of molten glass to control the amount of molten glass and prevent overcooling of blowing molds. I can do it.

[Effect of idea]

According to the parison length detection device of the present invention, the parison length can be automatically measured before entering the blowing mold.
Since it is possible to judge the quality of parisons and automatically discharge defective parisons, it has a significant effect on improving manufacturing efficiency by significantly improving quality and speeding up information to the production process. It also has tangible and intangible benefits, such as being useful in promoting labor-saving plans.

[Brief explanation of the drawing]

The drawings are a block diagram showing the structure of the parison length detection mechanism of the present invention and a side view of a part of the main part around the parison. 1 parison, 3 parison detection timing detection sensor, 4 hood, 5 parison length detection sensor head, 16 defective parison discharge section, 17 parison length judgment and discharge calculation mechanism.

Claims (1)

[Scope of utility model registration request] A parison suitable for blowing is made by supporting the molten glass gob and applying a blow head from above.
In a device that blows and forms hollow glass articles in a mold, multiple infrared detection sensors detect the radiant heat emitted from the parison, check for the presence of a molten glass gob, and sense when it has reached a predetermined position. a detection sensor, a calculation unit and a data display unit that amplify the electrical signals from each of the sensors and determine the quality of the parison shape, and adjust the time lag between the amplified signals of the infrared detection sensor and the position detection sensor. a phase adjustment mechanism, and a calculation mechanism that shifts the output signal of the calculation section by the time it takes for the clock pulse output from the phase adjustment mechanism and the parison shape pass/fail signal to reach a predetermined position for ejecting a defective parison. A parison detection mechanism for a hollow glass article blowing device, characterized in that: