JPH0380733B2 - - Google Patents

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 tips molded using a blow molding machine such as the Hartford 28 machine have an unnecessary part called a moil integrally molded into the mouth of the glass tip.
This part must be cut to make the product. A common method for this purpose is to hold the glass tip upside down and insert its mouth into a ring-shaped burner to burn off the moil. A device called the Hartford 28 machine is used in conjunction with the above-described Heartford 28 machine (e.g., Giegerich and Trier
"Glass Machines", 1969, Springer-Verlag,
P.313-P.322). This burn-off machine is for example
It is a rotary device with 30 heads, and the burner inserted through the mouth of the glass tip burns only while rotating within a predetermined angle range by the action of the distributor built into the device, and then The gas is cut off and the fire is automatically extinguished, repeating the cycle. 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 when products were left uncut, they were transferred from the burn-off machine to the conveyor. The parts that were damaged caused the parts to break and glass fragments were scattered, which 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, but this was not achieved. It has been difficult to put it into practical use because of problems such as the difficulty in extracting the detected signals from a rotary table that rotates several tens of times per minute and the need for as many detection means as there are heads.

(Problems to be Solved by the Invention) The present invention solves the conventional problems as described above, and can accurately determine 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 a burn-off machine, which 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 presence or absence of moil cutting can be determined by calculating the AND of the output signal indicating that the glass tip has passed on the axis of the temperature sensor and the timing pulse indicating that the glass tip has passed on the axis of the temperature sensor.

(Embodiment) Next, the present invention will be explained in more detail with reference to the illustrated embodiment. In FIG. A continuous rotary burn-off machine equipped with a head, 4 a table for unloading, and 5 a take-out conveyor. As shown in FIGS. 2 and 3, the continuously rotating rotary table 6 of the burn-off machine includes a ring-shaped burner 7 for burning off the moil, and a glass tip 3.
0 is adsorbed in an inverted state as shown in the figure, and its mouth is inserted into the inside of the burner 2, and the moil 31 is integrally molded into the mouth of the glass tip 30.
A suction head 8 is provided to perform burning off. The glass tip 30 with the moil is then supplied to the suction head 3 of the burn-off machine 3 by the arm loader 2 at position A in FIG. The burner 7 is extinguished and taken out onto the table 4 at the D position, but the moil 31 of most of the glass tips 30 has already been burned off well before reaching the C position.

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 the temperature at the mouth of each glass tip 30 is detected and output at the high temperature section as shown in Fig. 4A. Generate a signal. Further, as shown in FIG. 2, a proximity switch 12 etc. is attached to the fixed side of the burn-off machine, and when the glass tip 30 passes on the axis of the temperature sensor 9, the timing shown in FIG. Generates a pulse. The output signals from the temperature sensor 9 and the proximity switch 12 are sent to the arithmetic unit 14 via the amplifier 13 and the like, where the AND operation of these signals is performed.

Next, the relationship between the cutting status of the moil 31 and these output signals will be explained. First, glass tip 3
If the temperature at the mouth of the glass tip 30 has not risen sufficiently, remove the glass tip 30 as shown in A of Figure 4A.
Even when the temperature sensor 9 passes directly in front of the temperature sensor 9, the temperature sensor 9 does not detect a high temperature part, and its output is flat. Therefore, when the logical product is calculated between the timing pulse and the timing pulse, the output is flat as shown in C of FIG. 4A. Next, just before the moil 31 is burnt out, the mouth of the glass tip 30 becomes incandescent, so two high-temperature parts are detected before and after the timing pulse, as shown in FIG. Since the temperature is low, when the logical product is calculated between the timing pulse and the timing pulse, the output is still flat as shown in FIG. 4B (c). Furthermore, Moyle 31
When the cutting is completed and the moil 31 falls onto the table as shown in Fig. 4C, the burner frame, which had been blocked by the glass tip 30, extends over its entire surface, as shown in Fig. 4C, A. A wide range of high temperature areas were detected before and after the timing pulse, and when the logical product was calculated between them and the timing pulse, Figure 3C
The output shown in Figure C is produced. In this way, the presence or absence of moil cutting can be clearly distinguished, and if moil cutting is not completed, the glass tip 3
When 0 is detected by the sensor 9, the signal is synchronized with the transfer of the glass tip 30, sequentially shifted backward by the shift register 17, and a valve opening command is given to the electromagnetic valve 16 etc., and the removal device 15
As a result, the glass tip 30 with poor moil cutting can be removed from the line.

(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 the timing signal based on the behavior of the glass when cutting the moil. As a result, it was possible to accurately determine whether or not moil cutting was completed for each head of the burn-off machine without installing a detection means on each head.Using the present invention, glass chips with uncut moil can be removed in the subsequent process. This completely prevents glass shards from scattering and machine troubles caused by flow. As described above, 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, and it will greatly contribute to the industry.

[Brief explanation of drawings]

Fig. 1 is a plan view of the entire device used to carry out the present invention, Fig. 2 is a partially cutaway front view thereof, Fig. 3 is a partially cutaway front view of the main part, and Fig. 4 is a plan view of each step of the present invention. In the output waveform diagram, A is the output of the temperature sensor, B is the timing pulse, and C is their AND. 9: Temperature sensor, 30: Glass tip, 31:
Moyle.

Claims (1)

[Claims] 1. An infrared temperature sensor is installed on the fixed side of the burn-off machine to continuously detect the temperature of the opening of the glass tip that passes in front of it, and an output signal indicating the high temperature part and the temperature of the glass tip on the axis of the temperature sensor are detected. 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 has passed.