JP2018069711A - Heat treatment apparatus for web - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat treatment apparatus for a web W, in which energy saving can be achieved.SOLUTION: The heat treatment apparatus has an upper trunk 20 in a heat treatment chamber 14, an upper circulation fan 22 provided on an upper face of the upper trunk 20, an upper heating apparatus 40, a plurality of upper nozzles 26 provided on a lower face of the upper trunk 20, a lower trank 30 in the heat treatment chamber 14, a lower circulation fan 32 provided on a lower face of the lower trunk 30, a lower heating apparatus 42, a plurality of lower nozzles 36 provided on an upper face of the lower trunk 30, an exhaust port 44, an exhaust fan 48, and an upper blocking plate 60 provided so as to hang down from the upper part of a carry-in port 16 to above a web W.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a heat treatment apparatus for a web.

  Conventionally, a heat treatment apparatus that heats or heat-treats a web by conveying a web supported by a tenter chain in a heat-insulating heat treatment chamber in the front-rear direction and blowing hot air from the upper nozzle and lower nozzle arranged above and below the conveyance path to the web. Has been proposed.

JP 2002-189705 A

  Also in the heat treatment apparatus as described above, recently, energy saving is required, and it is necessary to perform heat treatment of the web by using energy efficiently.

  In view of the above problems, an object of the present invention is to provide a web heat treatment apparatus capable of realizing energy saving.

  The present invention includes a heat treatment chamber having heat insulation, a rectangular carry-in port that opens into the front surface of the heat treatment chamber and into which the web is carried, a conveyance path for the web that extends along the front-rear direction in the heat treatment chamber, An upper trunk provided in an upper portion of the heat treatment chamber, an upper circulation fan provided on an upper surface of the upper trunk, an upper heating device provided between a ceiling surface of the heat treatment chamber and an upper surface of the upper trunk; A plurality of upper nozzles provided on the lower surface of the upper trunk above the transfer path in the heat treatment chamber, a lower trunk provided at a lower portion of the heat treatment chamber, and provided on a lower surface of the lower trunk A lower circulation fan, a lower heating device provided between the bottom surface of the heat treatment chamber and the lower surface of the lower trunk, and a lower portion of the transfer path in the heat treatment chamber, provided on the upper surface of the lower trunk plural A web having a nozzle, an exhaust port opened in the heat treatment chamber, an exhaust fan for exhausting air from the exhaust port, and an upper closing plate provided so as to hang down from the upper part of the carry-in port to the upper side of the web It is a heat treatment apparatus.

  According to the present invention, energy saving can be achieved by executing in the normal mode during the manufacturing for heating the web and in the eco mode during the non-manufacturing.

It is a side view of the heat processing apparatus which shows one Embodiment of this invention. It is the longitudinal cross-sectional view seen from the side of the heat processing chamber. It is the longitudinal cross-sectional view which looked at the heat processing apparatus from the front. It is the perspective view seen from the lower part of the upper trunk and the upper nozzle. It is a block diagram of a heat processing apparatus. It is a front view of a carrying-in entrance. It is a front view of the carrying-in port of the example 1 of a change. It is a front view of the carrying-in port of the example 2 of a change.

  Hereinafter, the heat processing apparatus 10 of the web W of one Embodiment of this invention is demonstrated with reference to FIGS. The heat treatment apparatus 10 according to the present embodiment conveys a long web W such as fabric, film, paper, or the like by a tenter apparatus 12, and heats the web W conveyed by the tenter apparatus 12 by applying hot air from above and below. Is. In addition, the conveyance direction of the web W is the front-rear direction, and the width direction is the left-right direction.

(1) Structure of heat treatment apparatus 10 The structure of the heat treatment apparatus 10 will be described with reference to FIGS. As shown in FIG. 1, the heat treatment apparatus 10 is connected to a plurality of (for example, four in the drawing) heat treatment chambers 14 along the conveyance direction of the web W. The structure of each heat treatment chamber 14 will be described.

  The heat treatment chamber 14 is a rectangular parallelepiped casing and has a heat insulating structure. A carry-in port 16 for the web W is opened on the front surface of the first heat treatment chamber 14 of the heat treatment apparatus 10, and a carry-out port 18 is opened on the rear surface of the heat treatment chamber 14 at the rear end. The plurality of heat treatment chambers 14 are installed on a horizontal floor using a plurality of support legs 58.

  A flat rectangular parallelepiped upper trunk 20 is disposed inside the heat treatment chamber 14 and above the conveyance path of the web W. The upper trunk 20 is made of metal and has a hollow inside.

  An upper circulation fan 22 is provided at the center of the upper surface of the upper trunk 20. The motor portion of the upper circulation fan 22 protrudes from the ceiling surface of the heat treatment chamber 14. The upper circulation fan 22 sucks air from the upper suction port 24 opened in the upper trunk 20 and blows it into the upper trunk 20.

  A plurality of upper nozzles 26 are arranged on the lower surface of the upper trunk 20 along the front-rear direction. The upper nozzle 26 extends in the width direction (left-right direction) of the web W, and the cross section forms an isosceles triangle. On the lower surface of the upper nozzle 26, two slit-shaped upper outlets 28 are provided as shown in FIG. The hot air blown from the upper circulation fan 22 to the upper trunk 20 enters from the upper end portion of each upper nozzle 20 and is blown out directly from the upper blowing port 28. A temperature sensor 58 is provided inside the upper nozzle 26.

  A heating device 40 is provided in the front-rear direction inside the heat treatment chamber 14 and on the left side of the upper portion thereof. The heating device 40 is a burner device that is provided across the two heat treatment chambers 14 and is supplied with gas and heated with a flame.

  An upper air filter 41 is provided horizontally from the left side of the upper trunk 20 toward the left side wall of the heat treatment chamber 14. The upper air filter 41 is provided to remove unnecessary substances from the air circulating to the heating device 40.

  A flat rectangular parallelepiped lower trunk 30 is disposed inside the heat treatment chamber 14 and below the web W conveyance path. The lower trunk 30 is made of metal and has a hollow inside. The lower trunk 30 is attached symmetrically with respect to the upper trunk 20.

  A lower circulation fan 32 is provided at the center of the lower surface of the lower trunk 30. The motor portion of the lower circulation fan 22 protrudes from the bottom surface of the heat treatment chamber 14. The lower circulation fan 32 sucks air from the lower suction port 34 protruding from the lower trunk 30 and blows it into the lower trunk 30.

  A plurality of lower nozzles 36 are arranged on the upper surface of the lower trunk 20 along the front-rear direction. The lower nozzle 36 extends in the width direction of the web W and has a cross section of an isosceles triangle. Two slit-shaped lower outlets 38 are provided on the upper surface of the lower nozzle 36. Hot air blown from the lower circulation fan 32 to the lower trunk 30 enters from the lower ends of the lower nozzles 30 and is blown out directly from the lower outlets 38.

  A heating device 42 is provided in the front-rear direction inside the heat treatment chamber 14 and on the lower right side thereof. The heating device 42 is a burner device that is provided across the two heat treatment chambers 14 and is heated with a flame by supplying gas.

  A lower air filter 43 is provided horizontally from the right side of the lower trunk 30 toward the right side wall of the heat treatment chamber 14. The lower air filter 43 is provided to remove unnecessary substances from the air circulating to the heating device 42.

  An exhaust port 44 is provided on the ceiling surface of each heat treatment chamber 14. Exhaust ducts 46 that connect the exhaust ports 44 are provided above the ceiling surfaces of the plurality of heat treatment chambers 14. One exhaust fan 48 is provided on the downstream side of the exhaust duct 46. The exhaust fan 48 sucks air from the exhaust port 44 of each heat treatment chamber 14 and exhausts it from the discharge port 50.

(2) Structure of the Tenter Device 12 The plurality of heat treatment chambers 14 are provided with the tenter device 12 along the conveyance path of the web W. The tenter device 12 is a pin tenter device, and a plurality of web fixing portions 54 are arranged on the upper surfaces of a pair of left and right tenter rails 52 so as to be movable in the front-rear direction, and each web fixing portion 54 is connected by a tenter chain (not shown). Yes. The pair of left and right tenter rails 52 are fixed to both the left and right sides of the lower nozzle 36. The tenter chain is endless and is spanned between a pair of front and rear sprockets provided outside the heat treatment apparatus 10, and the sprocket is rotated by a motor to move the tenter chain along the direction of the conveyance path. . Accordingly, the web fixing portion 54 moves from the carry-in port 16 of the heat treatment apparatus 10 toward the carry-out port 18. The pins of the pair of left and right web fixing portions 54 pierce both ears of the web W, and convey the web W in an expanded state.

  The pair of left and right tenter rails 52 and 52 of the tenter device 12 can be moved symmetrically according to the width of the web. When the width of the web is short, the pair of left and right tenter rails 52 and 52 are moved closer to each other to adjust the width of the web. When the distance is wide, the pair of left and right tenter rails 52 are separated. However, the maximum distance between the pair of left and right tenter rails 52 and 52 is determined by the horizontal dimension of the rectangular carry-in port 16.

(3) Electrical configuration of heat treatment apparatus 10 The electrical configuration of the heat treatment apparatus 10 will be described with reference to the block diagram of FIG. The heat treatment apparatus 10 is provided with a control unit 56 composed of a computer. The control unit 56 is connected to the tenter device 12, the upper circulation fan 22, the lower circulation fan 32, the upper heating device 40, the lower heating device 42, the exhaust fan 48, and the temperature sensor 58 of each heat treatment chamber 14. Has been.

(4) Operation state of heat treatment apparatus 10 Next, the operation state of the heat treatment apparatus 10 will be described.

  An operation state in which the heat treatment apparatus 10 carries the web W from the carry-in port 16 by the tenter apparatus 12 and heats it will be described. The control unit 56 operates the heating device 40 to rotate the upper circulation fan 22 and the lower circulation fan 32 at a predetermined number of rotations. The air inside the heat treatment chamber 14 is heated by the heating device 40 and blown out from the upper nozzle 26 onto the upper surface of the web W by the upper circulation fan 22. Further, air is heated by the lower heating device 42, and hot air is blown from the lower nozzle 36 to the lower surface of the web W. As a result, the web W conveyed by the tenter device 12 is heated and blown from above and below in the expanded state, heat treatment is performed, and then the web W is unloaded from the unloading port 18. The hot air hitting the web W circulates inside the heat treatment chamber 14, circulates again to the upper heating device 40 through the upper air filter 41. Further, it circulates through the lower air filter 43 to the lower heating device 42. The control unit 26 performs feedback control of heating and stopping by the upper heating device 40 and the lower heating device 42 so that the temperature detected by the temperature sensor 58 falls within a preset heat treatment temperature range. On the other hand, the exhaust fan 48 rotates at a predetermined rotational speed, exhausts a part of the air inside the heat treatment chamber 14 from the exhaust port 44 of each heat treatment chamber 14, and discharges it from the discharge port 50 through the exhaust duct 46.

(5) Structure of carrying-in port 16 The structure of the carrying-in port 16 of the heat treatment chamber 14 will be described with reference to FIG.

  The carry-in port 16 opened to the front surface of the heat treatment chamber 14 has a rectangular shape extending in the left-right direction. Even if the web W fixed to the pins of the pair of left and right web fixing portions 54 is in the expanded state due to its weight, the center portion is in a state of slacking downward. Therefore, the vertical dimension of the carry-in port 16 is formed slightly larger in consideration of this slack portion.

  An upper closing plate 60 is provided at the upper central portion of the carry-in port 16. The upper closing plate 60 is made of a rectangular metal plate, and is formed to have a shorter left-right dimension than a position where the pair of left and right tenter rails 52, 52 are closest. In addition, the vertical dimension of the upper closing plate 60 is located above the web W whose lower end portion hangs downward and hangs down to a position where it does not contact.

  Further, an upper closing plate 60 is also provided on the upper part of the carry-out port 18 provided on the rear surface of the heat treatment chamber 14.

(6) Effect According to the present embodiment, the upper closing plate 60 is suspended above the carry-in port 16 and the carry-out port 18 of the heat treatment chamber 14, thereby preventing heat from being released from the heat treatment chamber 14. In addition, cold air can be prevented from flowing in from the outside. For this reason, the temperature of the heat treatment chamber 14 is unlikely to decrease and energy is saved.

  Further, the web W is conveyed while being hung down, but since the upper closing plate 60 is provided above the web W, it does not come into contact with the conveyed web W.

  Further, since the horizontal dimension of the upper closing plate 60 is shorter than the minimum distance between the pair of left and right tenter rails 52, 52, even the web W having a short width is in contact with the upper closing plate 60. do not do.

(7) Modification 1
In the above embodiment, the left and right dimensions of the upper closing plate 60 are constant as shown in FIG. 7, but in this modification, slide plates 62 and 64 are provided on the left and right sides of the upper closing plate 60, respectively. The left and right slide plates 62 and 64 are slid to the maximum width in accordance with the distance between the tenter rails 52 and 52 to increase the closed area of the carry-in entrance 16.

  According to this modified example, the area larger than that of the upper closing plate 60 of Embodiment 1 can be closed, so that energy saving can be achieved.

(8) Modification 2
In the above embodiment, as shown in FIG. 8, the upper closing plate 60 is provided only above the carry-in port 16 and the carry-out port 18, but the lower closing plate 66 is also provided below the carry-in port 16 and the carry-out port 18. In this case, the vertical dimension of the lower closing plate 66 is formed to be smaller than the vertical dimension of the upper closing plate 60 in consideration of sagging of the web W.

  According to this modified example, since the upper and lower sides of the carry-in port 16 and the carry-out port 18 are closed, heat is more difficult to escape, and cold air is less likely to enter, so that energy is saved.

(9) Other Modifications In the above embodiment, the tenter device 12 is described as the pin tenter device, but a clip tenter device may be used instead.

  In the above embodiment, the upper heating device 40 and the lower heating device 42 are burner devices. However, instead of this, an electric heater, or a heat exchanger using steam or heat medium oil may be used.

  Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Heat processing apparatus, 12 ... Tenter apparatus, 14 ... Heat processing chamber, 16 ... Carry-in port, 18 ... Carry-out port, 20 ... Upper trunk, 22 ... Upper circulation fan, 26 ... Upper nozzle, 30 ... Lower trunk, 32 ... Lower circulation fan, 36 ... Lower nozzle, 40 ... Upper heating device, 42 ... Lower heating device, 44 ... Exhaust 46, exhaust duct, 48 ... exhaust fan, 56 ... control unit, 60 ... upper closing plate

Claims (11)

A heat treatment chamber having heat insulation properties;
A rectangular inlet for opening the front surface of the heat treatment chamber, into which the web is carried,
A transport path for the web extending along the front-rear direction in the heat treatment chamber;
An upper trunk provided in the upper part of the heat treatment chamber;
An upper circulation fan provided on the upper surface of the upper trunk;
An upper heating device provided between the ceiling surface of the heat treatment chamber and the upper surface of the upper trunk;
A plurality of upper nozzles provided above the transfer path in the heat treatment chamber and provided on a lower surface of the upper trunk;
A lower trunk provided at a lower portion in the heat treatment chamber,
A lower circulation fan provided on the lower surface of the lower trunk;
A lower heating device provided between a bottom surface of the heat treatment chamber and a lower surface of the lower trunk;
A plurality of lower nozzles provided below the transfer path in the heat treatment chamber and provided on an upper surface of the lower trunk;
An exhaust opening opened in the heat treatment chamber;
An exhaust fan for exhausting air from the exhaust port;
An upper closing plate provided so as to hang down from the upper part of the carry-in entrance to above the web;
A heat treatment apparatus for a web having: A tenter device that conveys the web in an expanded state along the conveyance path;
The heat processing apparatus of the web of Claim 1. The tenter device is
A pair of left and right tenter rails;
A web fixing portion that fixes both ear portions of the web and moves in the front-rear direction on the tenter rail;
The heat processing apparatus of the web of Claim 2 which has these. On both sides of the inside of the carry-in entrance, a pair of left and right tenter rails and a pair of left and right web fixing portions are arranged,
The upper blocking plate is provided so as to hang down at the carry-in port between the pair of left and right tenter rails and the pair of left and right web fixing portions,
The web heat treatment apparatus according to claim 3. The pair of left and right tenter rails are movable within a certain range in the left-right direction,
The horizontal dimension of the carry-in entrance is shorter than the dimension when the interval is the minimum,
The heat processing apparatus of the web of Claim 4. The upper blocking plate is slidable in the left-right direction, and the dimensions in the left-right direction can be adjusted.
The heat processing apparatus of the web of Claim 1. A lower closing plate protruding from the lower part of the carry-in port to the lower part of the web;
The heat processing apparatus of the web of Claim 1. A rectangular outlet for opening the front surface of the heat treatment chamber and carrying out the web;
An upper closing plate provided so as to hang down from the upper part of the carry-out port to above the web;
The web heat treatment apparatus according to any one of claims 1 to 6, further comprising: A lower closing plate protruding from the lower part of the carry-out port to the lower part of the web;
The web heat treatment apparatus according to claim 8. The upper heating device and the lower heating device are a burner, an electric heater, or a heat exchanger,
The heat processing apparatus of the web of Claim 1. The web is a fabric, a film, or paper;
The heat processing apparatus of the web of Claim 1.

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