JPS58694Y2 - Single-sided plating equipment for continuous hot-dip plating method - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a single-sided plating apparatus in a continuous hot-dip plating method, and particularly to a structure of a single-sided plating apparatus that can be easily replaced with an existing double-sided plating apparatus in a plating line.

Among the continuous hot-dip plating methods, the Zenzima method (in-line annealing method) uses directly cold-rolled strip as material, and processes equivalent to electrical cleaning, annealing, and skin pass are performed at the same time as the plating process. Many new continuous melt plating lines are using this method because it is low cost and produces products of excellent quality.

In addition, the demand for single-sided plated steel sheets has increased in recent years, and in order to manufacture single-sided plated steel sheets, the strip is run along a zinc roll whose bottom part is immersed in molten zinc, and only one side is in contact with the molten zinc. The immersion method is suitable in terms of efficiency.

For this reason, it has been considered to manufacture single-sided plated steel sheets using the existing double-sided plating line using the Zenzima method.

However, in order to perform single-sided plating on a continuous hot-dip plating line having a double-sided plating device, it is necessary to replace the existing double-sided plating device with a predetermined single-sided plating device.

In other words, in order to perform single-sided plating, it is necessary to change the position of the zinc roll, change the length and tip shape of the snout, change the type and position of the wiping nozzle, and install a nozzle for heating the zinc roll. Various types of replacement single-sided plating equipment have been developed, but all of them can change from double-sided plating to single-sided plating.
Another disadvantage is that it requires a great deal of time and effort to replace single-sided plating with double-sided plating.

This idea was made to eliminate the above-mentioned drawbacks, and it was possible to perform plating by simply attaching each member necessary for single-sided plating to a frame-shaped pedestal and installing the frame-shaped pedestal on the existing foundation. It is an object of the present invention to provide a single-sided plating device that can replace plating with single-sided plating in a short time and with less labor.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in the figure, at the top of a plating bath 1 provided in a continuous hot-dip plating line for double-sided plating, there is provided a foundation 2 (not shown) on which a double-sided plating device is removably attached.

The single-sided plating device 4 of the present invention is installed on the base 2 after the double-sided plating device has been removed, so that single-sided plating can be performed on a hot-dip plating line.

That is, the stand 4 of the single-sided plating apparatus 3 is assembled into a frame shape using steel materials with various cross-sectional shapes, and the base 2 is installed at the bottom of the stand 4.
A fixed base 5 is provided at a position corresponding to , and is fixed onto the foundation 2 by means such as bolting.

A zinc roll 6 is attached to the center of the frame 4 so as to be semi-immersed in the plating solution by supporting both ends with bearings 7, and the zinc roll 6 is attached to the top of the frame 4 via a sprocket or an endless checker 7. Drive machine 8 for giving rotation
is provided.

Furthermore, a burner nozzle 9, a wiping nozzle 10, and a snout tip 11 are arranged and integrated around the zinc roll 6 on the pedestal 4.

The burner nozzles 9 are arranged in an appropriate number in the width direction directly above the outer circumferential surface of the zinc roll 6 and heat the surface of the zinc roll 6 by burning combustion gas.

The wiping nozzle 10 is located on the outlet side from the molten zinc 12 of the stone tube A running along the zinc roll 6,
Spray wiping gas on the outer surface of strip A,
It is mounted on the pedestal 4 by a support mechanism 13 so as to be able to move up and down freely.

In the support mechanism 3, a lifting shaft 15 is supported by guide members 14 attached to both sides of the upper part of the pedestal 4, and a lifting table 16 is installed between the lower ends of both the lifting shafts 15, and the lifting table 16 is attached to the upper side of the pedestal 4. By supporting the jacks 17 provided on both sides of the
The height position of the wiping nozzle 10 attached to the lifting platform 16 can be adjusted.

The tip of the snout tip 11 faces the outer peripheral surface of the zinc roll 6, and is provided with an arc-shaped notch 18 for lengthening the immersion time of the strip A, so that when the lower part of the zinc roll 6 is immersed in the molten zinc 12 A predetermined length is immersed in molten zinc 12, and the proximal end is connected to an existing snout via an expansion joint 19 such as a bellows.

The position of the zinc roll 20 in the case of a double-sided plating apparatus is shown by a dashed line in FIG.

This invention has the above-mentioned structure, and in order to perform single-sided plating on a continuous hot-dip plating line, first remove the double-sided plating device installed on the zinc bath 1, and then remove the integrated single-sided plating device 3 from the stand. 4 on the foundation 2 and fixing the frame 4 built on the zinc bath 1, the lower part of the zinc roll 6 and the tip of the snout tip 11 are partially immersed in the molten zinc 12 as shown in the figure. Install it so that it is immersed.

Note that this semi-immersed state means that only the portion of the zinc roll 6 below the entry and exit contact positions with respect to the strip A is immersed.

In this state, connect the base end of the snout tip 11 to the expansion joint 19.
Connect the strip A to the existing snout, and place the strip A fed through the snout along the zinc roll 6.
The surface of the zinc roll 6 is heated by the flame of the burner nozzle 9, and the strip A to which molten zinc has adhered is passed through the wiping nozzle 10.
This method sprays wiping gas onto the outer surface of the plate to perform continuous single-sided plating.

As described above, according to this invention, the zinc roll, burner nozzle, wiping nozzle, and snout tip required for single-sided plating are integrated into a stand that can be attached and detached from the foundation above the plating bath in the continuous melt plating line. As a result, all the parts necessary for single-sided plating are provided, and changing from double-sided plating to single-sided plating can be done by simply attaching and detaching the pedestal, making it possible to change to single-sided plating in an extremely short time and with less labor. , single-sided plating by semi-immersion is easily possible using the Sendzimer plating method.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing the state in which the single-sided plating apparatus according to the invention is used, and FIG. 2 is a longitudinal sectional side view thereof. 1 is a plating bath, 2 is a foundation, 3 is a single-sided plating device, 4 is a frame, 5 is a fixed base, 6 is a zinc roll, 8 is a driving machine, 9 is a burner nozzle, 10 is a wiping nozzle, 11
13 is the snout tip, 13 is the support mechanism, and 19 is the expansion joint.

Claims (1)

[Scope of utility model registration request] A frame-shaped pedestal configured to straddle the plating bath of a continuous melt plating line, a zinc roll provided so as to be semi-immersed in the plating solution, and a drive mechanism for rotating the zinc roll; an appropriate number of burner nozzles provided directly above the outer peripheral surface of the zinc roll to heat it in the width direction; a wiping nozzle that sprays a wiping gas onto the outer surface of the strip that has passed through the molten zinc along the zinc roll; A support mechanism for attaching the nozzle so that it can be raised and lowered freely, and a replenishment snout tip portion whose tip is positioned relative to the sink and roll and whose base end is equipped with an expansion joint are attached at a predetermined position and integrated, A single-sided plating device for continuous hot-dip plating, characterized by a frame-shaped pedestal that can be attached to and removed from an existing foundation.