JPS63206319A - Detection of moil cutting in burn-off machine - Google Patents

Abstract

PURPOSE:To accurately detect whether moil cutting is completed in each head of a burn-off machine and to prevent glass cups from flowing to the following process while leaving the moil uncut, by combining an output signal from a temperature sensor set at the fixed side of a burn-off machine with a timing signal. CONSTITUTION:A temperature sensor 9 of infrared light type is set at the fixed side of a burn-off machine and temperature of the mouth part of glass cups 30 passing in front of the sensor is continuously detected. Then theoretical product of (a) an output signal showing the high-temperature part of the cup and (b) a timing pulse showing passage of the glass cups 30 on the axis of the temperature sensor 9 is calculated (amplifier 13 and a calculator 14) and cutting or noncutting is recognized by presence [cutting is completed in output shown by C-c] of (c) the output of the calculator.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for detecting moil breakage in a burn-off machine that uses a burner to burn off the moil formed at the mouth of a blow-molded thin-walled glass tip.

(Prior art) Glass tip molded by a blow molding machine such as the Hartford 28 machine has an unnecessary part called moil integrally molded into the mouth part, so it is not necessary to cut this part to make the product5. be. A common method for this purpose is to hold the glass tip in an inverted position and insert its mouth into a ring-shaped burner to burn off the moil. A device called the Tr.
ier rGlassMachlnesJ s 196
9. Springer-Verlag, P., 313
~F, 322), this burn-off machine is e.g.
It is a rotary device with two heads, and the burner into which the opening of the glass tip is inserted burns only while rotating within a predetermined angle range due to the action of the distributor built into the device, and then the gas However, with conventional burn-off machines, there was no way to detect whether or not the opening of the glass tip had been reliably cut, so in rare cases the cut was left incomplete. When a product of
This was not only dangerous but also caused machine trouble.

Therefore, the inventor of the present invention considered installing a means for mechanically detecting the falling of the moil using a limit switch or the like on each head on the rotary table, and using this to accurately detect the position at which the cutting of the moil was completed. There are problems in that it is difficult to extract signals from a rotary table that rotates several tens of times per minute, and that it requires the same number of detection means as the number of heads, making it difficult to put it into practical use.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems and enables accurate determination of whether or not the cutting of moil has been completed for each head of a burn-off machine. This was completed with the aim of developing a method for detecting moil cuts in burn-off machines that allows the number of heads to be much smaller than the number of heads.

(Means for Solving the Problems) The present invention provides an infrared temperature sensor on the fixed side of the burn-off machine, continuously detects the temperature of the mouth of the glass tip passing in front of it, and detects the high temperature part. The present invention is characterized in that the logical product of the output signal indicating that the glass cup has passed on the axis of the temperature sensor and the timing pulse indicating that the glass cup has passed on the axis of the temperature sensor is calculated, and the presence or absence of the output determines whether or not the moil has been cut.

(Embodiment) Next, the present invention will be explained in more detail with reference to the illustrated embodiment. In FIG. is a continuously rotating burn-off machine equipped with multiple heads, (4) is an unloading table, (
5) is a take-out conveyor. As shown in Figures 2 and 3, the continuously rotating rotary table (6) of the burn-off machine has a ring-shaped burner (7) for burning off the moil.
) and the bottom of the glass cup (3o) are sucked in an inverted state as shown in the figure, and its mouth is inserted into the inside of the burner (2), and the moil is integrally formed with the mouth of the glass cup (30). (31) Suction head (8)
) is provided. The glass tip (30) with moil is then supplied to the suction head (3) of the burn-off machine (3) by the arm loader (2) at position A in Figure 1, and the burner (7) is ignited at position B (32). The burner (7) is extinguished at the C position, and the glass tip (30) is taken out onto the table (4) at the D position. The moil (31) has already been burned out at the location.

In the present invention, an infrared temperature sensor (9) is installed just before the C position where the burner (7) is extinguished. The axes of these temperature sensors (9) are directed toward the center of the glass tip (30) and burner (7) that pass in front of them, and detect the temperature at the mouth of each glass tip (30) as shown in Fig. 4 ( As shown in b), an output signal is generated in the high temperature section.

Also, as shown in Fig. 2, a proximity switch (12) etc. is installed on the fixed side of the burn-off machine, and when the glass tip (30) passes on the axis of the temperature sensor (9), as shown in Fig. 4. A timing pulse as shown in (b) is generated. The output signals from the temperature sensor T91 and the proximity switch (12) are sent to an arithmetic unit (14) via an amplifier (13), etc., where a logical AND operation is performed.

Next, the relationship between the cutting status of the moil (31) and these output signals will be explained. First, if the temperature at the mouth of the glass tip (30) has not risen sufficiently,
As shown in (a) of ), even when the glass tip (30) passes just in front of the temperature sensor (9), the temperature sensor (9) does not detect a high temperature part and its output is flat. When the logical product is calculated between the slave wave and the timing pulse, the output is flat as shown in Figure 4 (A) (C).
Next, just before the moil (31) is burnt out, the mouth of the glass tip (30) becomes incandescent, so two high temperature parts are created before and after the timing pulse, as shown in (a) of Fig. 4(B). is detected, but since the center part is at a low temperature, by calculating the logical product between the central part and the timing pulse, we get ((B) in Figure 4).
As shown in c), the output is still flat. Furthermore, the cutting of Moyle (31) is completed and Moyle (31)
When the burner falls onto the table as shown in Figure 4 (C), the burner frame, which had been blocked by the glass tip (30), extends over its entire surface, as shown in Figure 4 (C) (A). A wide range of high temperature areas are detected before and after the timing pulse, and when a logical product is calculated between them and the timing pulse, the third
An output as shown in (c) of Figure (C) is generated. In this way, the presence or absence of moil cutting can be clearly distinguished, and if the moil cutting is not completed, the glass tip (30)
is detected by the sensor (9), the signal is synchronized with the transfer of the glass cup (30), the shift register (17) sequentially shifts the glass cup backwards, and a valve opening command is issued to the solenoid valve (16), etc. The glass tip (30) with poor moil cutting can be removed from the line by the removal bag ff1 (15).

(Effects of the Invention) As is clear from the above description, the present invention skillfully combines the temperature at the mouth of the glass tip detected by the temperature sensor and a timing signal based on the behavior of the glass when cutting the moil. By doing this, we succeeded in accurately knowing whether or not moil cutting has been completed for each head of the burn-off machine (without having to install a detection means on each head).By using the present invention, it is possible to accurately determine whether or not moil cutting has been completed for each head of the burn-off machine. It is possible to completely prevent the scattering of glass fragments and machine troubles caused by flowing into the subsequent process.In this way, the present invention makes it possible for the first time to detect whether or not moil cutting has been completed in a burn-off machine, which has not been done at all in the past. Therefore, the contribution to the industry is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the entire apparatus used for carrying out the present invention;
Fig. 2 is a partially cutaway front view of the same, Fig. 3 is a partially cutaway front view of the main part, and Fig. 4 is an output waveform diagram at each step of the present invention. (A) is the output of the temperature sensor; (b) is the timing pulse, and (c) is their logical product. (9): Temperature sensor, (30) ? Glass cup, (3
1): Moyle. Figure 1 Figure 112 Figure 3 Figure 54

Claims (1)

[Claims] An infrared temperature sensor is installed on the fixed side of the burn-off machine to continuously detect the temperature of the mouth of the glass cup passing in front of it, and an output signal indicating the high temperature area and a signal indicating that the glass cup is on the axis of the temperature sensor. A method for detecting moil breakage in a burn-off machine, characterized in that the presence or absence of moil breakage is known from the presence or absence of an output by calculating an AND with a timing pulse indicating that the moil breakage has occurred.