KR101546936B1

KR101546936B1 - Oven equipment of continuous coating line

Info

Publication number: KR101546936B1
Application number: KR1020150074635A
Authority: KR
Inventors: 한석원
Original assignee: 한석원
Priority date: 2015-05-28
Filing date: 2015-05-28
Publication date: 2015-08-25

Abstract

The present invention relates to an improved oven apparatus with a continuous coating line preventing damage due to contact with an oven and a strip, and having an oven main body with an improved insulation structure. The improved oven apparatus with a continuous coating line comprises: a combustion unit; a blowing unit circulating air heated by the combustion unit; an air circulation unit supplying and collecting the heated air; and an oven main body including an upper nozzle and a lower nozzle, wherein the upper and lower nozzles are connected with the air circulation unit, respectively. The upper and lower nozzles, which have a predetermined shape of hexahedron forming an inner space, include slit nozzles formed on nozzle surfaces facing from upper and lower sides with respect to the drying space. Therefore, the improved oven apparatus of the continuous coating line prevents contact damage to the strip passing through the drying space by preventing the slit nozzles from protruding from the nozzle surfaces. The improved oven apparatus of a continuous coating line provides a strip with the excellent attribute of preventing damage (scratch) to a surface of a product due to contact and collision with the strip, and is formed of embedded slit nozzles, thereby minimizing inconvenience when washing the nozzle surfaces outlet holes, and preventing heat loss in the oven apparatus, deformation, and damage due to thermal expansion.

Description

[0001] Oven equipment of continuous coating line [0002]

The present invention relates to an improved oven installation of a continuous coating line and more particularly to an oven installation for preventing damage due to contact with a nozzle in an oven of a strip, To an improved oven installation of a continuous coating line improved to an insulating structure.

Generally, in order to dry a coated strip in an oven facility of a continuous coating line (also referred to as a continuous coating line) which is dried after continuous surface treatment such as painting resin on the surface of the strip, hot air is sprayed onto the surface of the strip And a non-contact type oven facility is used because such a hot air heating oven causes damage to the coated film before and after drying when it comes into contact with an object such as a roll.

However, as the drying speed of the drying strip increases, the length in the oven becomes longer, forming a considerable depth of catenary depth, and the depth of the hanging water increases in proportion to the square of the length. Therefore, The height of the oven facility is inevitably increased. If the height of the oven facility is increased, there is a problem that a space for installing the oven facility is increased, and the left and right shifts (diagonal amounts) of the strips are increased, so that it is difficult to control the tension and running characteristics.

On the other hand, in a continuous coating line requiring a high-speed operation speed, a device for floating the coated strip by non-contact type, that is, a gas injection floating device is used. This lifting device floats the strip by suitably using the injection pressure of the hot air blown on the lower surface of the strip and simultaneously heats the coating and the strip by using the hot air blowing effect. And the nozzle has two curved nozzles opposing each other, so that the flotation characteristics are good. However, since most of the gas injection energy forms a pressure necessary for floating the strip, there is a problem that the strip is not completely dried.

To solve this problem, an improved oven facility of the continuous painting line of Japanese Patent No. 10-0838845 has been proposed and known. This oven is provided with an oven through which the strip is passed and a predetermined distance from the upper surface of the strip at the upper part of the inner space of the oven and a pair of first slits An upper blowing box in which a plurality of first blowing parts in which nozzles are formed are arranged in a passing direction of the strip; a plurality of second blowing parts provided in the lower part of the inner space of the oven at a predetermined distance from the lower surface of the strip, A lower blowing box in which a plurality of second blowing parts are arranged in the direction of passage of the strip, the second blowing part being formed with a pair of second slit nozzles having a width larger than the width of the first slit nozzle; A circulation unit for circulating the gas to supply the gas to the upper blowing box and the lower blowing box, and a heating unit for heating the gas circulated by the circulation unit A. That is, the slit nozzles having a plurality of gas injection holes are protruded to face each other in the upward and downward directions in the strip drying space, and are alternately arranged to increase the heat transfer efficiency by forming a distance from the heating gas.

However, the arrangement structure of the slit nozzles in the vicinity of the strip may cause damage due to the contact between the strip and the protruding slit nozzles due to the depth of the strip due to the stopping impact when the stopper is stopped to perform the necessary action during the drying operation , Generation of gas) occurs and the quality of the strip is lowered.

In addition, owing to the characteristics of the improved oven facility of the continuous coating line, the nozzle is periodically cleaned in order to prevent defects due to foreign substances. The oven facility having the above-described exposure type nozzle is very inconvenient due to the protruding nozzle during cleaning, There was also a problem such as not working properly.

The oven facility for heating and drying the coating solution adhered to the surface of the strip used for the continuous coating line according to the product characteristics is a wall body of the oven body (hereinafter referred to as an assembly structure of the panels, It has been necessary to provide a corresponding structure for minimizing the heat loss in the furnace and to prevent deformation and breakage due to thermal expansion and to prevent the furnace structure from being deteriorated by causing the insulation of the plate body to be exposed to the oven.

In addition, such problems as the damage of the strip and the defective insulation of the main body of the oven cause deterioration of the productivity and quality of the continuously coated strip, resulting in economic damages. Ultimately, the problem of increasing the depth of the strip in the oven facility that pursues high-speed operation speed still remains, so that even if the depth of the strip occurs, it is necessary to prevent the strip from being damaged and to facilitate the cleaning of the nozzle.

The improved oven facility of the continuous painting line of the present invention provides an oven facility that fundamentally blocks damages (occurrence of flaws) due to contact with the nozzles even when the strip drying line is temporarily turned on in consideration of the above problems and necessity It has its purpose.

The improved oven facility of the continuous painting line of the present invention taking the above problems and necessities into account is also intended to improve the wall structure covering the outside of the oven main body.

In particular, it is an object of the present invention to provide an oven facility that fundamentally blocks damages (occurrence of flaws) caused by contact with a slit nozzle even during a temporary stop of a strip drying line, and at the same time, The present invention has an object of providing an oven facility that can partially control the blowing pressure of the slit nozzle to increase the drying efficiency of the strip being dried and prevent contact with the slit nozzle even when there is a stopping impact or the like.

To achieve the above object, there is provided an improved oven facility for a continuous painting line,

Combustion section; A blowing section for circulating the heated gas as the combustion section; A gas circulation unit for supplying and recovering the heating gas; And an oven main body which is composed of an upper nozzle and a lower nozzle, the upper and lower nozzles being respectively connected to the gas circulating part and forming a strip drying space between the upper and lower nozzles, ,

Four vertical walls; An upper surface portion forming an upper surface of the vertical wall portion; One of the upper and lower surfaces of the upper and lower parts is a nozzle face which faces upward and downward with respect to the drying space and is installed so that the slit nozzle does not protrude from the nozzle face It can be achieved as an improved oven facility of a continuous painting line.

Four vertical walls; An upper surface portion forming an upper surface of the vertical wall portion; And a nozzle body fixed at a predetermined interval such that at least one of the upper and the lower surface portions forms the slit nozzle, the lower body portion forming the lower surface of the vertical wall portion, have.

In order to achieve the above object, the slit nozzle of the improved oven facility of the continuous painting line of the present invention is formed by long sides formed on both sides of adjacent nozzle bodies.

In order to achieve the above object, a slit nozzle of an improved oven facility of the continuous coating line of the present invention is formed by inclined longitudinal sides formed on both sides of adjacent nozzle bodies, and a nozzle body forming the slit nozzle is formed on the wall It is preferable that the fixed portion to be fixed is formed on a short side having a short length and an inclined surface inclined at a predetermined angle is formed on the long side.

To achieve the above object, there is provided an oven main body of an improved oven facility of a continuous painting line of the present invention,

A plurality of long holes for heat dissipation are formed on the connecting surface, and a supporting portion is extended and formed on inner and outer surfaces of the connecting surface, and a fixing hole is formed only on one supporting portion A continuous coating line oven comprising a support frame, a heat insulating material inserted into the support frame, an inner plate having a fixing hole formed therein for fixing the support frame, and an outer plate disposed outside the support frame, Can be achieved as a facility.

Combustion section; Circulation - rich parts; A gas circulation unit for supplying and recovering the heating gas of the combustion unit; And upper and lower nozzles connected to the gas circulation unit, wherein the upper and lower nozzles are connected to the gas circulation unit, and between the upper and lower nozzles of the upper and lower nozzles, And an oven body forming a space,

The wall of the oven main body of the oven facility includes:

A plurality of long holes for heat dissipation are formed on the connecting surface, and a supporting portion is extended and formed on the inner and outer surfaces of the connecting surface, and a fixing hole is formed on one supporting portion A support frame; A heat insulating material inserted into the support frame; An inner plate having a fixing hole formed therein to be fixed to a supporting portion of the supporting frame; And an outer plate disposed on an outer side of the support frame,

The upper and lower nozzles,

And a slit nozzle formed on one side of the nozzle face, the nozzle face being connected to the gas circulation unit and the suction and exhaust unit, Nozzle; And

And a plurality of nozzles provided with a sensing member are formed so as not to protrude toward the drying space, and the heating gas of the gas circulation unit is supplied to the drying space, And a lower nozzle comprising a pumping unit provided between the nozzle and the gas circulating unit to exhaust the gas and a controller for controlling the pumping pressure of the pumping unit by sensing the sensing member, can do.

The improved oven facility of the continuous coating line of the present invention having the above-mentioned object and constitution has improved the protruding slit nozzle used in the conventional oven to a nozzle type buried inwardly so as to be horizontal to the nozzle surface, There is provided an effect of providing a strip of excellent quality which prevents the contact between the nozzle and the strip and the damage (occurrence flaw) of the product surface due to the collision in advance.

In addition, the improved oven facility of the continuous coating line of the present invention is periodically cleaned in order to prevent defects of the nozzle due to foreign substances due to its structural characteristics. In the case of the conventional protrusion type, However, since only the injection hole at the outlet of the nozzle is formed in the buried slit nozzle, a convenient cleaning effect is obtained by cleaning only the exit hole of the nozzle face.

The wall of the oven facility for heating and drying the coating solution adhered to the surface of the strip used in the continuous coating line of the present invention to minimize the heat loss in the oven and to prevent deformation and breakage due to thermal expansion, It is possible to provide an economical effect of improving the productivity by increasing the heat insulation effect of the oven facility during the operation by providing the heat dissipation structure.

1 is a schematic view of an oven of a conventional continuous painting line oven facility,
2 is an overall view of the continuous painting line oven facility of the present invention,
3 is a schematic perspective view of an oven body of an improved oven facility of the continuous painting line of the present invention,
4 is a perspective view showing the arrangement structure of the upper and lower nozzles of the oven main body in the improved oven equipment of the continuous painting line of the present invention,
5 is a cross-sectional view showing a slit nozzle of the upper and lower nozzles among the improved oven equipments of the continuous painting line of the present invention,
6 is an exploded perspective view of the nozzle body of the upper and lower nozzles of the improved oven facility of the continuous painting line of the present invention,
7 is a schematic cross-sectional view of the lower nozzle of the improved oven plant of the continuous painting line of the present invention,
8 is a schematic perspective view for explaining the nozzle body assembly state of the nozzle surface of the lower nozzle among the improved oven equipments of the continuous painting line of the present invention,
9 is an exploded perspective view of the outer wall of the oven body of the improved oven equipment of the continuous painting line of the present invention,
10 is a perspective view showing an assembly example of an outer wall of an oven body in an improved oven facility of the continuous painting line of the present invention,
11 is a partial cross-sectional view of the outer wall of the oven body of the improved oven facility of the continuous painting line of the present invention,
12 is a view showing another embodiment of the improved oven facility of the continuous painting line of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 of the accompanying drawings is a schematic view of an improved oven facility of the continuous painting line of the present invention.

The improved oven installation of the continuous painting line according to the present invention according to the above drawing mainly comprises a combustion section 1, a blowing section 2, a gas circulation section 3 and an oven main body 4.

The combustion section (1) has a combustion burner inside thereof, circulates through the burner, and reheats and burns the gas.

The blowing section 2 feeds the heated gas from the outlet 31 of the gas circulating section 3 to the inlets 33 and 34 of the oven main body 4.

The gas circulation unit 3 is connected to the inlets 33 and 34 of the oven main body 4 through the outlet 31 of the combustion unit 1 to transfer the heating gas. The hot gas is ejected from the upper and lower sides of the strip ("A ") at a predetermined normal atmospheric pressure and then recovered to the recovery port 32 for reheating, and then heated and circulated again.

The oven main body 4 is composed of an upper nozzle 10 and a lower nozzle 20. Each of the upper and lower nozzles 10 and 20 is connected to the gas circulating part 3 and the upper and lower nozzles 10 ("B") through which strips ("a") pass.

The upper and lower nozzles 10 and 20 in the oven main body 4 of the present embodiment can form slit nozzles 15 and 25 in the form of slots in the respective nozzle surfaces. The nozzle face may be a face facing one of the upper face 13 (23) or the lower face 14 (24). It is appreciated that the lower surface 14 of the upper nozzle and the upper surface 23 of the lower nozzle 20 may be nozzle faces facing each other and the remaining upper surface 13, Or an upper surface 13 blocking the upper portion. The slit nozzles 15 and 25 are formed between the nozzles 15 and 25. The slit nozzles 15 and 25 are not particularly limited in structure but may have a variety of slit structures such as a generally elongated shape.

FIG. 3 is a schematic perspective view of an oven main body of an improved oven facility of the continuous painting line of the present invention, and FIG. 4 is a side view of the improved oven equipment of the continuous painting line of the present invention, Fig. 5 is a cross-sectional view showing a slit nozzle of the upper and lower nozzles among the improved oven facilities of the continuous painting line of the present invention, Fig. 6 is a cross-sectional view of the upper and lower nozzles of the improved oven facility of the present invention continuous painting line, Fig.

In the oven main body 4 of the improved oven system of the continuous painting line according to the present invention, the upper and lower nozzles 10 and 20 are installed at predetermined intervals so as to face each other in the upward and downward directions . The upper and lower nozzles 10 and 20 have a substantially rectangular parallelepiped shape and include four vertical wall portions 12 and 22 and upper and lower portions 13 and 14 above and below the upright wall portions 12 and 22. [ And the lower surface portion 14 and the upper surface portion 23 constitute a plurality of nozzle bodies 11 and 21 constituting a nozzle surface opposed to each other.

The inside of the upper and lower nozzles 10 and 20 constitutes a space through which the heating gas is circulated and has an inlet 33 and an outlet 34 communicating with the heating gas discharging port 31 of the gas circulating unit 3, ) Can be formed. The upper nozzle 10 has the same structure as the lower nozzle 20, and the upper and lower placement directions can be reversed when installed.

In the upper and lower nozzles 10 and 20 of the present invention, several nozzle bodies 11 and 21 may be connected to the nozzle face.

The lower nozzle (20)
The upper surface portion 23 forms a nozzle surface, and several slit nozzles 25 may be formed in the horizontal direction along the nozzle surface. In the lower nozzle 20, the formation of the slit nozzle 25 is formed between the long side surfaces 212 of the nozzle bodies 21. It is preferable that the slit nozzle 25 has a slot shape with a narrow gap between the nozzle outlets 25a through which the gas is delivered and the nozzle inlets 25b are wider than the nozzle outlets 25a. It is particularly preferred that the slit nozzles 25 have the form of a narrow nozzle outlet 25a and a wider nozzle inlet 25b, but do not protrude from the nozzle face. The case of the upper nozzle 10 is also the same as described above.
The upper nozzle (10)
The upper surface portion 13 forms a nozzle surface, and several slit nozzles 15 may be formed in the horizontal direction along the nozzle surface. In the upper nozzle 10, the formation of the slit nozzle 15 is formed between the long sides (not shown) of the nozzle bodies 11. It is preferable that the nozzle outlet 15a of the slit nozzle 15 has a narrow gap shape and the nozzle inlet 15b is wider than the nozzle outlet 15a.

Therefore, the damage caused by the nozzle contact of the strip ("a") passing between the upper and lower nozzles 10, 20 hardly occurs.

7 is a schematic sectional view of the lower nozzle of the improved oven plant of the continuous painting line of the present invention, and Fig. 8 is a view showing the state of assembling the nozzle body of the nozzle surface of the lower nozzle among the improved oven equipments of the continuous painting line of the present invention FIG.

The upper and lower nozzles 10 and 20 according to the present invention can be implemented by assembling a plurality of nozzle bodies 11 and 21 forming the nozzle face of the above-described embodiment. Hereinafter, a specific assembling structure will be described by taking the lower nozzle 20 as an example.

As shown in the figure, the nozzle body 21 has a rectangular shape having a predetermined thickness, and the short side surface forms a fixing portion 211 having a fixing hole, and the other long side surface 212 has a long and sloped surface. Therefore, the slit nozzle 25 forms a narrow nozzle outlet 25a and a wider nozzle inlet 25b, and does not protrude from the nozzle face at the same time.

The slit nozzle 21 of the lower nozzle 20 according to the present embodiment forms the slit nozzle 25 by the inclination angle of the long side 212 of both sides of the nozzle body 21 adjacent to each other.

FIG. 10 is a perspective view showing an assembly example of the outer wall of the oven main body among the improved oven facilities of the continuous painting line according to the present invention, and FIG. 11 is a partial cross-sectional view of the outer wall of the oven body of the improved oven facility of the continuous painting line of the present invention.

The oven main body of the improved oven facility of the continuous painting line of the present invention according to the above drawings is as follows.

The wall body 40 of the oven body 4 includes a support frame 41, an outer plate member 42, a heat insulating material 43 and an inner plate body 44.

The supporting frame 41 is a rectangular frame made of four connecting surfaces so as to form a space therein. In order to minimize the heat loss due to the temperature difference between the inside and the outside of the oven, a large number of heat dissipation slots 47 (Φ15x100L) And the support portion 411 is extended and formed on the inner and outer surfaces of the connection surface and the fixing hole 412 is formed in the one support portion 411.

The insulating material 43 fills the inside of the inner and outer plates 42 and 44 and the seam at the time of assembling the plate and is wrapped with glass cloth and then the foreign material penetrates into the oven . A gasket (46, Glass cloth 25W x 6t) can be used at the connection part between the plate body and the plate body during assembly to maintain airtightness during thermal expansion.

The outer plate member 42 is joined to the outer surface of the support frame 41 to constitute the outer wall of the oven main body.

The inner plate 44 is attached to the inner surface of the supporting frame 41 by forming a fixing hole to be fixed to the supporting portion 411 of the supporting frame 41. It is preferable to maintain a basic dimension of the plate body at 840 mm and to maintain an interval of 4 mm in order to prevent distortion and deformation due to thermal expansion after assembly.

12 is a view showing another embodiment of the improved oven facility of the continuous painting line of the present invention.

Since the embodiment of the improved oven facility of the continuous painting line according to the present invention is substantially the same as that of the above-described embodiments, the duplicated description will be omitted.

That is, the improved oven facility of the continuous coating line of the present embodiment has a combustion unit 1 having a combustion burner and reheating and burning the gas after circulating through the burner, and a heating unit for heating the heated gas from the outlet 31 to the oven main body 4 And connected to the inlets 33 and 34 of the oven main body 4 through the outlet 31 of the combustion part 1 to be connected to the heating elements 2, And the gas is recovered and circulated to the recovery port 32 for reheating.

The oven main body 4 is composed of an upper nozzle 10 and a lower nozzle 50. Each of the upper and lower nozzles 10 and 50 is connected to the gas circulating part 3 and the upper and lower nozzles 10 ("B") through which a strip ("a") passes.

The wall 40 of the oven main body 4 of the oven facility comprises a support frame 41, an outer plate member 42, a heat insulating material 43 and an inner plate member 44.

The upper nozzle 10 in the oven main body 4 has a substantially rectangular parallelepiped shape and includes four vertical wall portions 12 and an upper portion of the vertical wall portion 12 as an upper surface portion 13, A plurality of slit nozzles 15 may be formed in the horizontal direction along the nozzle surface so as to form a nozzle surface having a plurality of long slit nozzles 15 in the bottom surface portion 14 constituting the bottom portion facing the bottom surface . The formation of the slit nozzles 15 may be formed by the interval of the inclined long sides of the nozzle bodies 11. [ Accordingly, the nozzle outlet 15a of the slit nozzle 15 is formed in a narrow gap shape and the nozzle inlet 15b is spaced apart from the nozzle outlet 15a. The narrow nozzle outlet 15a of the slit nozzle 15 and the wider nozzle inlet 15b can be prevented from protruding from the nozzle face. The inside of the upper nozzle 10 constitutes a space through which the heating gas circulates and an inlet 33 communicating with the heating gas discharging port 31 of the gas circulating unit 3 can be formed on one side wall.

The lower nozzle 50 forms a closed internal space, and a plurality of nozzles are installed so as not to protrude from the nozzle face toward the nozzle face. The nozzle 25 is provided with sensing members S11 to S33 and has pumping portions P11 to P33 connected to supply and exhaust the heating gas of the gas circulating portion 3 to the slit nozzle 25. In addition, And a controller 53 for controlling the pumping units P11 to P33 by sensing the sensing members S11 to S33.

In addition to the sensing members (S11 to S33), the nozzle may further include a suction port of gas in addition to a suction port of the gas. The pumping portions P11 to P33 may further include a plurality of pressure pumping and depressurization pumping. The nozzle of this embodiment does not have to be a slit nozzle.

All of the nozzles having the function of sensing the gas pressure of the sensing members S11 to S33 can be targeted and the gas pressure can be basically divided into three equal parts on the nozzle arrangement structure of the lower nozzle 50 By increasing the gas ejection pressure of the group of nozzles located at the center and lowering the gas ejection pressure of the group of nozzles disposed on the left and right sides around the nozzle group.

The gas pressure according to the nozzle group is controlled by the controller 53 sensing the gas pressure sensed by each nozzle of the nozzle group and controlling the pumping pressure of the pumping portions P11 to P33 sent to the nozzle group according to the determined default value .

Therefore, when the gas is sprayed from the lower side of the steel sheet toward the drying space ("I"), the steel sheet is ejected with a stronger pressure in the middle portion of the steel sheet, and both sides, So that the phenomenon of being stretched when the strip is moved can be improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the technical scope of the present invention should be defined by the claims.

3: gas circulation unit, 31: outlet, 32: collection port, 33, 34: inlet,
4: oven body, 10: upper nozzle, 11: nozzle body, 12: vertical wall portion, 13: upper surface portion,
15: slit nozzle, 15a: nozzle outlet, 15b: nozzle inlet, 20: lower nozzle,
21: nozzle body, 211: fixing portion, 212: long side surface, 22: vertical wall portion, 23: upper surface portion,
25: slit nozzle, 25a: nozzle outlet, 25b: nozzle inlet, 40: wall,
41: supporting frame, 42: outer plate member, 43: insulating member, 44: inner plate member, 411:
412: Fixing hole, 46: Gasket, 47: Long hole, 50: Lower nozzle.

Claims

Combustion section;
A blowing unit for circulating the heated gas in the combustion unit;
A gas circulation unit for supplying and recovering the heating gas;
An oven main body comprising an upper nozzle and a lower nozzle, the upper and lower nozzles being respectively connected to the gas circulating part and forming a strip drying space between the upper and lower nozzles;
Lt; / RTI >
The upper and lower nozzles,
A slit nozzle is formed on the nozzle face so as to prevent the slit nozzle from protruding from the nozzle face,
The wall of the oven main body,
A rectangular frame body having four connecting surfaces so as to form a space therein, characterized in that a large number of heat-radiating slots are formed in the connecting surface, and a supporting portion is extended and formed on the inner and outer surfaces of the connecting surface, A support frame;
A heat insulating material inserted into the support frame;
An inner plate having a fixing hole formed therein to be fixed to a supporting portion of the supporting frame; And
An outer plate disposed outside the support frame;
Of the continuous coating line.

The nozzle assembly of claim 1,
Four vertical walls;
An upper surface portion forming an upper surface of the vertical wall portion;
A lower surface portion constituting the lower surface of the vertical wall portion; and
Wherein one of the upper and lower surfaces comprises a nozzle face having a plurality of slit nozzles formed therein.

The nozzle assembly of claim 1,
Four vertical walls;
An upper surface portion forming an upper surface of the vertical wall portion;
A lower surface portion constituting the lower surface of the vertical wall portion; and
Wherein one of the upper and lower surfaces forms a nozzle surface, and several nozzles are fixed at predetermined intervals to form the slit nozzle;
An improved oven installation of a continuous coating line.

The method of claim 3,
Wherein the slit nozzles are formed by slits formed between the longitudinal long sides of the nozzle bodies adjacent to each other.

The method of claim 3,
The nozzle body includes:
Wherein the short side forms a fixed portion and the long side forms an inclined surface.

delete

In an improved oven installation of a continuous coating line,
Combustion section;
Circulation - rich parts;
A gas circulation unit for supplying and recovering the heating gas of the combustion unit; And
An oven main body having upper and lower nozzles connected to the gas circulation unit, the upper and lower nozzles being connected to the gas circulation unit, and a drying space through which the strip passes between the upper and lower nozzles;
Lt; / RTI >
In the oven main body,
A support frame having a rectangular frame and formed with a large number of heat-dissipating slots on its four wall surfaces, a support portion extending on the end of four wall surfaces, and a fixing hole formed on one support portion;
A heat insulating material inserted into the support frame;
An inner plate having a fixing hole formed therein to be fixed to a supporting portion of the supporting frame; And
An outer plate disposed outside the support frame;
Lt; / RTI >
The upper and lower nozzles,
And a nozzle face formed at one side of the nozzle face to form a slit nozzle which does not protrude from the nozzle face, the nozzle face being connected to the gas circulation unit and the air intake and exhaust unit, Nozzle; And
And a plurality of nozzles provided with a sensing member are formed so as not to protrude toward the drying space, and the heating gas of the gas circulation unit is supplied to the drying space, A lower nozzle comprising a pumping unit disposed between the nozzle and the gas circulating unit to exhaust the gas, and a controller for controlling a pumping pressure of the pumping unit by sensing the sensing member;
The oven arrangement of the continuous coating line.