JPS5851773B2 - Marking equipment for high temperature product materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a so-called stencil-type marking device that performs marking using an original plate (stencil). This invention relates to a device that performs operations with high efficiency and stability.

Generally, 600'C to 100'C immediately after rolling or continuous casting
High-temperature materials at 0°C have oxidized scale attached to their surfaces that easily peels off, and even if markings are made on this, the markings will fall off along with the scale as it cools. It is preferable to perform marking after cooling to 700° C. or lower, since it is difficult to adhere due to the convection of the high-temperature air layer.

For this reason, in the past, cooling water was sprayed onto the surface of the high-temperature material for 20 to 30 seconds using a number of descaling nozzles to remove scale and cool the material surface at the same time, and then marking was performed to prevent the coating of the paint. There were ways to improve it.

However, in this marking method, for example, paper with perforated characters is applied to the marking position on the material, and paint is sprayed from above using a spray gun in a scanning manner to mark the material. It takes 10-30 seconds to spray the paint.

Therefore, during paint spraying, the once cooled material regenerates heat, not only reducing the cooling effect by half, but also causing scale to regenerate and worsening the fixing properties of the paint.

To prevent this phenomenon, it is necessary to cool it more than necessary.

In addition, there have been problems such as the descaling time and the time required to start marking after descaling is long, the processing capacity is low, and a large amount of cooling water is required for descaling, resulting in high running costs.

The present invention has been made in view of the above-mentioned conventional problems, and includes a spray box in which a marking original plate and a nozzle for spraying paint are attached to a trolley that can move to a marking position on a material to be marked, and a marking original plate guide. A guide roller, a descaling nozzle, and an air nozzle that forms an air curtain between the descaling surface and the paint spraying surface are arranged in a specific positional relationship, and the marking position of the trolley is made prior to marking. A marking device for high-temperature product materials, in which scale is removed from the marking area of the high-temperature product materials with a small amount of water by running the machine, and at the same time, partial cooling is applied, and then immediately marking is performed using the above-mentioned marking box with almost no recuperation. This is a new offering.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIGS. 1, 2, and 3, a plurality of parallel rollers 3.・
A series of roller conveyors 4 are installed,
A marking device 5 movable across the roller conveyor 4 in the axial direction is arranged at a bridging portion of the roller conveyor 4.

The marking device 5 includes a main truck 7 guided by a pair of main rails 6.6 laid on a work floor, and a sub-truck 9 guided by a pair of auxiliary rails 8, 8 laid on the main truck 7. The main truck 7 is driven by a main cylinder 10 with a long stroke to a marking position between the front and rear roller conveyors 4 and to a retracted position on the side of the roller conveyor 4.
The auxiliary truck 9 has a auxiliary cylinder 11 with a short stroke.
The main truck 7 travels within the range of the marking position in order to mark the material 1 to be marked.

As shown in FIGS. 4, 5, and 6, two airtight box-shaped spray boxes 12.12 are mounted on the sub-truck 9.
One for each line so that lines of symbols can be marked at the same time.
A total of 2 pieces are installed side by side.

The spray box 12 has an original plate 13 with a symbol punched out on the front side, a spray gun 14 for spraying paint on the rear side, and a shielding plate (Fig. Not shown.

), and the shield plate is connected to each external cylinder 15. ..., 1
By controlling the opening and closing by 5, a symbol corresponding to the opened punching is sprayed from the spray box 12 onto the material 1 to be marked, and the material 1 to be marked is marked.

The spray boxes 12.12 are arranged in parallel at the middle of a horizontal support 16 extending in the running direction on the sub-truck 9, and vertical support 17. 17 and the vertical support 17
．． Guide rollers 19, 19 provided at the tips of the spray boxes 12, 17 via springs 1B, 18 are retractably fitted onto the tips of the spray boxes 12, 17 against the marking surface of the material 1 to be marked.
12 are guided so that they face each other in parallel with a certain distance apart.

Descaling nozzles 20, 20 for spraying high-pressure cooling water onto the marking portion of the material 1 to be marked are swingably supported on the side surface of the spray box 12 in front of the movement thereof by a pin 21.

The descaling nozzle 20.20 is located close to the spray box 12, and descales the marking portion of the material 1 to be marked 1 prior to marking, and at the same time provides partial cooling.

Between the descaling nozzle 20.20 and the spray box 12 is an air nozzle 22 that forms an air curtain between the descaling surface and the paint spraying surface.
A spray box 121 is attached and installed to prevent high-pressure cooling water from mixing with paint spray and inhibiting the clarity of markings.

To perform marking work with the marking device 5 configured as described above, the material to be marked 1 transported by the roller conveyor 4 is stopped at a position outside the bridging portion of the roller conveyor 4 (the position shown in FIG. 1). .

Then, the main truck T in the retracted position is moved to the marking position by the main cylinder 10.

The sub-truck 9 on the main carriage 7, which is positioned at the marking position, is located at the marking start position at the left end of the material to be marked 1 in FIG. , are set to face the material to be marked 1 at a constant distance by guide rollers 19, 19.

External cylinder 15 of spray box 12. ....

15 controls the opening and closing of the shielding plate, and while the appropriate punching of the original 13 is opened, the descaling nozzle 20 starts spraying high-pressure cooling water.

Then, when the sub-truck 9 at the marking start position is run at a speed of about 200 m/sec in the marking direction by the sub-cylinder 11, the scale on the marking part of the material to be marked 1 is removed by the descaling nozzle 20 prior to marking. At the same time, partial cooling is applied.

As the auxiliary truck 9 travels, the spray box 12, 12 is located within one second at the marking area where the scale has been removed and the area has been partially cooled, and almost no heat is recovered.

The temperature drop caused by the descaling nozzle 20 varies depending on the material temperature, but is approximately 100'C to 300°C,
The material surface temperature (700°C) at which the paint adheres stably
℃) or less.

The high pressure cooling water supplied by the descaling nozzle 20 is 40 to 9/crlL×401/min, and the descaling nozzle 20 is
．． 20 for a total of 801/min, and although it is continuously sprayed during the marking operation, it takes about 10 seconds for one marking operation.

In addition, the conventional high-pressure cooling water amount is 20kg/C/L x 200
1/minute x 30 seconds.

When actually marking, the subcart 9 and the spray boxes 12 are temporarily stopped on the marking surface.

Then, the spray nozzle 14.14 is operated, and the symbol corresponding to the punching of the original plate 13 is stamped into the spray box 12.14.
12 onto the material to be marked 1 to mark the material to be marked 1.

The stop time of this spray box 12.12 is the same as the one hour of spraying by the spray nozzle 14.14, which is about 0.2 to 0.3 seconds.

Further, the marking time per - symbol is the sum of one hour of spraying and the time of moving the spray box 12, which is about 0.5 to 1 second.

As described above, after scale removal and partial cooling with the descaling nozzle 20, marking can be performed immediately with the spray box 12 after a period of about 1 second.

As is clear from the above description, the present invention uses a descaling nozzle to remove scale and partially cool the marking area by moving the trolley to the marking position, and immediately performs marking in the spray box. Because it is a marking device designed to
There is almost no heat recovery on the marking surface during paint spraying, so marking can be done effectively without scale re-occurrence.

In addition, after descaling, marking can be done for a short time (1
The marking processing capacity is high (2 to 3 times that of the conventional method) because the descaling process can be carried out in about 2 seconds), and the amount of cooling water required for descaling is also small (about 174 times the conventional method), resulting in lower running costs.

[Brief explanation of drawings]

Fig. 1 is a plan view of the marking device, Fig. 2 is a front view of Fig. 1, Fig. 3 is a side view of Fig. 2, and Fig. 4 is a plan view showing the relationship between the spray box, descaling nozzle, and air nozzle. , FIG. 5 is a rear view of FIG. 4, and FIG. 6 is a side view of FIG. 4. 1... Material to be marked, 5... Marking device, T
...Main trolley, 9...Sub-bogie, 12...Spray box, 13...Original plate, 14...Spray gun, 1
9...Guide roller, 20...Descaling nozzle, 22...Air nozzle.

Claims (1)

[Scope of Claims] 1. A trolley capable of traveling to a marking position on a material to be marked is provided, a marking original plate is attached to the trolley facing the marking surface of the material to be marked, and a marking original plate is applied with paint at the marking position behind it. A spray box is installed with a nozzle for spraying paint, and a spray box is located on both sides of the spray box in the traveling direction, and is in contact with the marking surface of the material to be marked. a guide roller that guides the parallel E lines to face each other at a certain distance; and a descaling nozzle that is located adjacent to the front of the spray box in the traveling direction and sprays high-pressure cooling water onto the marking portion of the material to be marked. , an air nozzle located between the descaling nozzle and the spray box to form an air curtain between the descaling surface of the material to be marked and the paint spray surface. Product material marking equipment.