JP2005001323A - Heating chamber for belt machine, and belt heating method and device using the chamber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating chamber by which the temperature of a running endless metallic belt can efficiently and quickly be elevated without variation of temperature distribution in a belt width direction and further energy consumption can be minimized, and also to provide the endless belt heating method and device using the chamber. <P>SOLUTION: The heating chamber comprises a double box. A first chamber has an open face opposite to the endless belt, and the steam exhaust ports connected to an outside steam suction source. A second chamber has at least one steam ejection nozzle at the open face side of the first chamber and has a steam introduction port connected to an outside steam source. The steam having a required temperature is introduced into the second chamber through the steam introduction port and is ejected from the steam ejection nozzle toward the unprocessed face of the running endless belt. The steam ejected to the belt is discharged from the steam exhaust port of the first chamber through the gap formed between the first and second chambers. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is for heating a metal endless belt of a belt machine that continuously performs various processes such as heating, pressurization, and cooling via a metal endless belt stretched between two or more drums. The present invention relates to a heating chamber, a heating method, and a heating apparatus.
[0002]
[Prior art]
In recent years, processing machines that continuously perform various processing such as heating, pressurization, and cooling using a metal endless belt, such as coating machines, film forming machines, electronic component manufacturing machines, and polymerization of synthetic resins. It has come to be used in many fields such as machines, sheet-to-sheet bonding machines, various resins, chemicals, and food cooling / solidifying / granulating machines. Machines for processing and manufacturing products for these workpieces are often simply referred to as belt machines. A single metal endless belt is used for these belt machines, and the workpiece is processed between a single belt machine that performs desired processing on the workpiece on the belt and a pair of upper and lower metal endless belts. There are double belt machines that perform various types of processing on products. The metal endless belts are thick (0.6-3 mm) and have high rigidity, and many of them have a large weight exceeding 8 m.
[0003]
As an example of a single belt machine, there is an optical film casting device, for example, a metal endless belt whose surface that travels in one direction from a specially designed T-die is a liquid resin supplied from a high-precision gear pump. It is supplied to the top and heated with the rotation of the belt to remove the solvent, or the resin material is polymerized and taken up as a film or a sheet. At this time, the temperature such as heating and cooling by the belt and the width and thickness of the film or sheet are controlled with high accuracy. According to this belt machine, since it is manufactured in a state where no tension is applied in all directions of the product film, a high-quality film free from optical distortion can be manufactured.
[0004]
As a specific example of this single belt machine, for example, there is a single belt machine disclosed in Patent Document 1. This single belt machine is a dripping machine for forming fluid chemical products into particles. This dripping machine rotates a rotating screen having an internal chamber in which a fluid chemical product is accommodated under atmospheric pressure, and collides the fluid chemical product with a pressure member in the chamber to generate a fluid pressure. Then, a fluid chemical product is extruded through the opening of the screen to form a drip, and is dropped onto the conveying surface of a metal endless belt running on one side. The drip dropped on the transport surface is transported and solidified into particles, which are taken out and collected. As this particle | grain, it is a particle | grain which consists of chemical products, such as a chemical | medical agent, a seasoning, a fragrance | flavor, a synthetic detergent, a resin stabilizer, for example.
[0005]
On the other hand, the double belt machine continuously performs various processes such as heating / cooling, reaction, pressurization / lamination, mirror transfer, etc. while conveying the workpiece between the upper and lower belts that travel. According to Document 2, a work W in which an inlet sheet having an IC chip mounted on a coil antenna is arranged between card bases is arranged between metal endless belts that are arranged one above the other and run in one direction in the opposite belt region. A double belt machine that manufactures a resin card with a built-in IC chip is disclosed, which is sandwiched and heated by a heating / pressurizing device and then pressurized and cooled. Also, for example, in Patent Document 3, two or more pairs of metal endless belts traveling in the same direction and at the same speed are installed in series, and the unfoamed resin sheet is clamped and transferred by the pair of belts, A method of continuously producing a foamed sheet having uniform air bubbles by passing between a plurality of sets of upper and lower belts with different configurations in a multistage manner is disclosed.
[0006]
[Patent Document 1]
JP 11-276877 A
[Patent Document 2]
JP 11-338997 A
[Patent Document 3]
JP-A-7-88873
[0007]
[Problems to be solved by the invention]
In this type of belt machine, uniform heating and cooling of the metal endless belt is one of the most important requirements that determine the quality of the product. That is, the high-temperature heating region and the cooling region are sorted along the traveling path of the traveling endless belt, and the work piece that is continuously transferred is required in the high-temperature heating region and the cooling region of the endless belt. It is necessary to perform uniform heating and cooling at this temperature. However, since the endless belt is not stationary but moves in one direction, the endless belt itself must be switched to the high temperature heating region and the cooling region as quickly as possible because the endless belt itself is changed to the cooling region after the high temperature heating region. In addition, the heating and cooling must have a uniform temperature distribution in the belt width direction.
[0008]
As for heating, for example, Patent Document 3 also discloses a roll and combination in which temperature is controlled by a heat medium such as an air heater, oil, or the like by spraying a gas such as air for heating an endless belt in Patent Document 3 It is stated that Heating of the belt by gas blowing is difficult to heat at a high temperature of 200 to 300 ° C., but since the heating body does not contact the belt and it can be heated uniformly at the gas blowing position, it is adopted for various processing processes. . In the above-mentioned Patent Document 3, the specific configuration is not clear, but conventionally, by heating by blowing a gas such as air, an injection nozzle for gas or the like is formed on the surface facing the endless belt of a simple box-shaped sealed chamber. However, high temperature gas such as heated air is sprayed onto the belt surface to heat the chamber.
[0009]
However, as described above, as long as the sealed chamber has a single box shape, it is difficult to recover the heat medium such as gas once ejected from the injection nozzle unless a mechanism for recovering the gas is actively provided. In the case of heating with wind, it is common to dissipate to the outside air as it is. For example, even if the gas after the ejection can be recovered, if it is used again as a heating gas, the recovered gas will be greatly cooled during the recovery, and this will be reduced to the required temperature. To make it, it must be heated again from the beginning. As a result, extremely large heat energy is required.
[0010]
Further, when the belt is heated by jetting high-temperature gas by a nozzle having a normal rectangular injection nozzle shape, the heating region is narrowed, and thus the traveling endless belt is instantaneously and locally heated. However, immediately after passing through the jet region of the heated gas, the cooling starts immediately, the processing for the workpiece is not continuous, and the physical properties of the workpiece tend to vary.
[0011]
The present invention has been made to solve the above problems, and a specific object thereof is to raise the temperature of a traveling metal endless belt efficiently and without any variation in the temperature distribution in the belt width direction. It is another object of the present invention to provide a heating chamber that can reduce energy consumption to a minimum, and a heating method and a heating apparatus for an endless belt using the chamber.
[0012]
[Means for solving the problems and effects]
Such an object is effectively achieved by the endless belt heating chamber, the endless belt heating method and the heating apparatus using the chamber of the present invention described below. The gist of the present invention is a heating chamber applied to a belt machine that heats a workpiece by a heat medium through a metal endless belt that is wound around a plurality of drums and rotates. A first chamber having a heat medium discharge port connected to an external heat medium suction source; and a space between the first chamber and the metal endless belt. A second chamber housed in the same chamber with a required gap and having one or more heat medium ejection nozzles on the open surface side of the first chamber and having a heat medium inlet connected to an external heating supply source. A heating chamber for a belt machine, characterized in that the heating medium ejection nozzle has a heating medium ejection port for ejecting the heating medium over the entire belt width of the metal endless belt. Located in.
[0013]
The heat medium outlet is composed of one or more heat medium outlet slits arranged linearly extending in the belt width direction at a predetermined interval in the running direction of the endless belt, or arranged in a staggered manner. It is preferable to consist of a large number of heat medium ejection holes.
[0014]
It is preferable that a synthetic resin having a low friction coefficient is disposed on at least a part around the heat medium outlet.
[0015]
Further, the gist of the present invention is a belt heating for heating a metal endless belt of a belt machine, to which the heating chamber is applied and a heating medium ejected from the heating chamber, which is wound around a plurality of drums and rotates. In the method, a heat medium having a required temperature is introduced into the second chamber from an external heating supply source through the heat medium introduction port, and the heat medium introduced into the second chamber is converted into the heat medium. Ejecting from the ejection nozzle toward the non-processed surface of the endless belt, and discharging the heat medium ejected from the endless belt through the gap formed between the first and second chambers. A method for heating a metal endless belt of a belt machine comprising discharging from an outlet.
[0016]
Returning the heat medium discharged from the heat medium outlet to the heat medium inlet, detecting the temperature of the heat medium in the middle of returning to the heat medium inlet, and in the middle of returning based on the detected value Preferably, the method further comprises heating a circulating heat medium.
[0017]
Further, the gist of the present invention is arranged toward the running surface of a metal endless belt of a belt machine that is wound around a plurality of drums and rotates, and the metal endless belt is heated using the heating chamber. A heating device, a connecting pipe connecting the heat medium outlet of the first chamber and the heat medium inlet of the second chamber, and a downstream of the heat medium outlet in the connecting pipe. A heat medium suction means, a heating part disposed between the heat medium suction means and the heat medium inlet of the connection pipe, and the heating part and the heat medium introduction in the connection pipe. A heating device for a metal endless belt for a belt machine, comprising a heat medium temperature detection unit disposed between the mouth and the heat medium.
[0018]
As the heat medium in the present invention, a liquid such as water or heat medium oil; a gas such as air or nitrogen gas; a known heat medium such as steam is used. However, in the following explanation, steam is used for convenience. Will be described.
[0019]
A basic structure of a steam heating chamber according to the present invention is a steam heating chamber applied to a belt machine that heats a workpiece with steam through a metal endless belt that is wound around a plurality of drums and rotates. A first chamber having a steam outlet connected to an external steam suction source, the first chamber and the metal endless belt, comprising a box having an open surface facing the metal endless belt. A second chamber having one or more vapor jet nozzles on the open surface side of the first chamber and a vapor inlet connected to an external vapor supply source. The steam ejection nozzle has a steam ejection port for ejecting steam over the entire belt width of the metal endless belt.
[0020]
The first chamber is connected to an external steam supply source, and introduces, for example, high-pressure superheated steam supplied from the steam supply source through the steam inlet. The high-pressure steam introduced into the second chamber is diffused inside the chamber, and is uniformly ejected over the entire area in the belt width direction on one side of the endless belt that travels through the steam ejection nozzle formed on the surface facing the belt. Heat the metal endless belt quickly. The ejected steam is returned to the gap between the first chamber and the second chamber along the ejection surface of the endless belt. At this time, a part of the jetted steam leaks outside through a gap between the endless belt and the first chamber.
[0021]
The vapor returned to the gap between the first chamber and the second chamber is sucked from the vapor discharge port of the first chamber and discharged outside the chamber by a vapor suction source arranged outside. As a result, the steam ejected from the steam ejection nozzle can effectively heat the required region of the endless belt evenly, and the steam ejected by the belt and cooled is not directly dissipated to the outside, but the first chamber and Since the air is positively discharged from the discharge port through the gap between the second chamber and the endless belt, the endless belt is efficiently heated without coming into contact with the endless belt. It will be.
[0022]
If the steam outlet comprises one or more steam ejection slits arranged linearly in the belt width direction at a predetermined interval in the running direction of the endless belt, the steam ejection slit is even from the steam ejection slit. It is preferable because steam is ejected and uniform heating is performed in the belt width direction of the endless belt. Moreover, it can replace with this slit and can also be comprised from many vapor | steam ejection holes arranged in a zigzag form. In this case, it is preferable that the steam jet holes arranged in a staggered manner are such that if the adjacent holes are slightly overlapped in the belt running direction, the jet steam will be jetted on all belt surfaces in the belt width direction. .
[0023]
Furthermore, in the present invention, it is desirable to dispose a synthetic resin piece having a low friction coefficient around the steam outlet. As described above, since the steam outlet is arranged directly opposite to the traveling endless belt, when the steam outlet contacts the endless belt, not only the steam outlet but also the endless belt is damaged, There is a risk that uniform processing will not be possible. In order to avoid this, if a piece of synthetic resin with a low friction coefficient, such as fluororesin, is attached around the steam outlet as described above, both will be damaged even if the steam outlet contacts the endless belt. In addition, the durability of the second chamber and the endless belt can be improved as well as the influence on the product.
[0024]
Furthermore, in the present invention, using the above-described steam heating chamber, the steam discharged from the steam outlet can be returned to the steam inlet, and the steam temperature on the way to the steam inlet is detected. Then, based on the detected value, new high-temperature steam can be additionally introduced into the circulating steam in the middle of returning. That is, as described above, some of the steam directly ejected to the endless belt leaks directly from the first chamber opening surface to the outside, and further, the temperature of the steam decreases as it passes through the return path. It is unavoidable.
[0025]
Therefore, in the present invention, in anticipation of a decrease in the amount of steam due to leakage and a reduction in the temperature of the return steam, a predetermined amount of return steam is drained to the outside and a new high-temperature steam is added to the steam returned to the second chamber. By additionally introducing the steam, the steam introduced into the steam inlet of the second chamber is raised to a predetermined temperature. Therefore, the steam temperature is detected by the steam temperature sensor while reaching the steam inlet, and based on the detected value, the amount of steam to the new additional steam inlet at high temperature is determined via the controller, and the required amount of Additional high temperature steam is introduced to ensure the temperature and amount of steam introduced into the steam inlet of the second chamber.
[0026]
In the endless belt heating method described above, the above-mentioned steam heating chamber is arranged on the running surface of a metal endless belt of a belt machine that is looped around a plurality of drums and uses the steam heating chamber. Thus, effective belt heating can be realized by the following heating device for heating the metal endless belt.
[0027]
In other words, the steam heating device for the metal endless belt includes a connecting pipe that connects the steam outlet of the first chamber and the steam inlet of the second chamber, and the steam outlet of the steam outlet. A steam suction means disposed on the downstream side, a new steam introduction section disposed between the steam suction means and the steam inlet of the connection pipe, and the new steam introduction section in the connection pipe And a steam temperature detecting unit disposed between the steam inlet and the steam inlet. Furthermore, it is preferable to arrange an ultrafiltration means in the new steam introduction part. By passing through the ultrafiltration means, the dust mixed in the circulating steam is surely removed.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a case where steam is used as a representative embodiment of the present invention will be specifically described with reference to the drawings. FIG. 1 is a sectional view schematically showing an embodiment of a steam heating chamber of a metal endless belt in a belt machine of the present invention.
In the figure, reference numeral 10 denotes a steam heating chamber of the present invention for a metal endless belt 101 mounted on a belt machine, and the heating chamber 10 includes a first chamber 11 and a second chamber 21.
[0029]
The first chamber 11 in the present embodiment is a box made up of a pentahedron of front and rear, left and right side walls 12 to 15 and a bottom wall 16 which are formed of a stainless steel plate and whose upper side is opened. A pair of steam discharge ports 16a are formed at the left and right or front and rear ends of the bottom wall 16, and can be connected to an external steam discharge pipe 30 made of a bellows tube or the like. Further, a continuous piece 17 made of synthetic resin having a low friction coefficient made of, for example, fluororesin is attached to the open end edges of the side walls 12 to 15 along the edges. The steam outlet 16a is not necessarily formed in the bottom wall 16, but can be formed in any of the front, rear, left and right side walls 12-15. Further, the first chamber 11 is formed with a pipe insertion port 16b for hermetically inserting a steam introduction pipe 31 connected to a later-described steam introduction port 22a of the second chamber 21.
[0030]
On the other hand, the second chamber 21 includes a box body 22 made of a rectangular parallelepiped having a smaller volume and volume than the first chamber 11, and a steam ejection nozzle 23 formed on the upper wall surface of the box body 22. Yes. A steam introduction port 22a is formed at the center of the bottom wall of the box body 22, and a steam introduction pipe 31 made of a bellows tube or the like is connected thereto via a pipe insertion port 16b of the first chamber 11. .
[0031]
In this embodiment, as shown in FIG. 1, two slits 24 constituting three rows of steam outlets are formed at a predetermined interval in the belt running direction of the steam ejection nozzle 23. The slit 24 is not directly formed on the upper wall surface of the box body 22, and the open bottom surface side of a hollow body 25 (not shown) having an isosceles triangular cross section extends from the steam introduction portion 22 a of the box body 22. Projecting upward, the inside of the box body 22 communicates with the hollow body 25 via the steam introduction part 22a of the box body 22, and the slit 24 continues along the ridgeline of the top portion thereof. Is formed.
[0032]
The hollow body 25 is formed to be longer than at least the belt width of the endless belt 101, and the length of the slit 24 formed at the top of the hollow body 25 is set to a length that matches at least the belt width. In addition, the opening of the slit 24 is curved so that the upper part expands in the front-rear direction across the slit 24 in a cross-sectional view of the hollow body 25 to form a tongue piece 24a. By forming the slit 24 in such a shape, the steam introduced into the box body 22 can be effectively diffused and ejected in the traveling direction with respect to the ejection surface of the endless belt 101. Further, a plurality of synthetic resin short pieces 26 made of the same material as the synthetic resin continuous piece 17 of the first chamber 11 have a required interval at least part of the belt-facing surface of the tongue piece 24a in front of the opening. It is integrated with the attachment.
[0033]
FIG. 2 schematically shows an optical film casting apparatus which is an example of a single belt machine 100 to which the heating chamber 10 of the present invention having the above-described configuration is applied. The metal endless belt 101 applied to the belt machine 100 is subjected to super mirror surface processing having high thickness accuracy in the belt width direction. In this belt machine 100, the metal endless belt 101 is made of stainless steel and has a thickness of 1.5 mm, a belt width of 3 m, a belt speed of 2 to 100 m, and a product thickness of 10 μm or more. The metal endless belt 101 is passed over a driven drum 102 on the product transfer side and a driving drum 103 on the raw material resin supply side, and is actively rotated by the driving drum 103.
[0034]
The single belt machine 100 according to the illustrated example is supplied with a fixed amount of molten resin from a high-precision gear pump 104 disposed on the belt upper surface on the drive drum 103 side and above the end of the endless belt 101 on the drive drum 103 side. The steam is heated in the three-stage steam heating unit 106 while being driven through the T die 105 designed in the above-described manner and transferred to the driven drum 102 side on the belt 101, and then the driven drum. Through the belt turning portion on the 102 side, the take-up roll group 107 disposed on the outside of the driving drum 103 is fed to the driving drum 103 side while being carried on the lower surface of the belt 101 as the endless belt 101 rotates. Is wound around a winding unit (not shown).
[0035]
In this embodiment, the steam heating chamber 10 of the present invention is applied to each of the steam heating sections 106. In this steam heating chamber 10, the open surface of the first chamber 11 and the steam ejection nozzle 23 of the second chamber 21 are arranged in three stages toward the back surface of the processing area A of the traveling endless belt 101. Three sets are fixed to a frame (not shown) in the belt running direction. FIG. 3 illustrates one set of steam circulation circuits, but the other two sets have the same configuration except that the temperature of a new additional steam described later is changed. In addition, this figure illustrates the case where the belt heating steam is circulated and used, but when the steam in the factory can be used as it is and the loss of heat energy can be ignored, It is also possible to disperse it into the atmosphere without collecting it.
[0036]
The exhaust port 16 a of the first chamber 11 is connected to the exhaust conduit 30, and a circulation exhaust fan 32 is attached to the exhaust conduit 30, and the circulation exhaust fan 32 positively expels the steam in the first chamber 11. Suction and discharge. The discharge side of the circulation exhaust fan 32 is further connected to the circulation fan 33 by a discharge side conduit 34, and a filtration unit 36 is connected to the discharge side conduit 35 of the circulation fan 33. . The filtration unit 36 is provided with a prefilter 37 on the upstream side and a HEPA filter 38 on the downstream side. Excess steam out of the steam passing through the prefilter 38 is discharged to the outside through the discharge passage 39. Like to do. Further, a new steam supply line 40 that is supplied from a new steam supply source (not shown) to the steam passing through the prefilter 37 is connected to the upstream side of the HEPA filter 38. The new steam supply pipe 40 is provided with a heating section (not shown) that heats the high-pressure steam to produce superheated steam at 100 ° C. or higher.
[0037]
The HEPA filter 38 is connected to the steam introduction port 22a of the second chamber 21 on the air supply side by the steam introduction pipe 31 to constitute a circulation circuit as a whole. The steam introduction pipe 31 is provided with a temperature detector 41 and a pressure gauge 42. When the temperature of the steam detected by the temperature detector 41 deviates from a preset temperature, a control (not shown) is performed. The signal is sent to the section. The control unit calculates the mixing ratio between the amount of superheated steam supplied from the new steam supply line 40 and the amount of exhaust steam sent to the HEPA filter 38 via the prefilter 37, and surplus exhaust steam. Is discharged to the outside through the discharge passage 39 and new superheated steam corresponding to the mixing ratio is sent to the front stage of the HEPA filter 38. In this way, the temperature of the steam passing through the steam introduction conduit 31 is kept constant.
[0038]
The pressure gauge 41 constantly measures the pressure of the steam passing through the steam introduction pipe 31 and sends a measurement signal to the control unit. When the pressure gauge deviates from a preset pressure, the control unit reports the new steam. A flow rate control valve (not shown) provided in the supply line 40 is adjusted to supply new steam having a required flow rate. In the present embodiment, the drain pipe 42 is branched from the middle of the discharge side pipe 34 connecting the circulation exhaust fan 32 and the circulation fan 33, and a preset excess exhaust steam is discharged to the outside. I am letting.
[0039]
Now, in order to heat the metal endless belt 101 of the belt machine 100 using the belt heating device of the present invention having the above-described configuration, a steam inlet 22a is provided from the steam inlet line 31 to the second chamber 21. The high-pressure and high-temperature steam introduced through the inside of the second chamber 21 fills the inside of the box portion main body 22 of the second chamber 21, and is introduced into the hollow body 25 disposed at the upper portion through the upper surface opening portion 22 b and throttled by the slit 24. As a result, high-pressure steam is ejected from the slit 24 toward the lower surface of the endless belt 101 that travels in one direction. The jetted high-temperature steam is jetted onto the belt surface, and then diffused and guided to the gap between the outer surface of the second chamber 21 and the inner wall surface of the first chamber 11. At this time, a part of the steam ejected to the lower surface of the belt leaks to the outside from the belt width direction, but this leaked steam is collected in a plurality of collection hoods 44 arranged on the upper surface side of the endless belt 101 and discharged to the outside. The At this time, if necessary, the exhaust gas is purified and diffused to the outside air.
[0040]
Vapor introduced into the gap between the first chamber 11 and the second chamber 21 is actively sucked by the circulation exhaust fan 32 from the vapor discharge port 16a of the first chamber 11 through the discharge conduit 30, and surplus. The steam is drained from the drain pipe 43 and is further actively sucked through the discharge side pipe 34 by the circulation fan 33 and reaches the filtration unit 36. The discharged steam sent to the filtration unit 36 through the discharge side pipe 34 is first subjected to normal filtration through the prefilter 37 of the filtration unit 36 and then highly purified through the HEPA filter 38. Is sent out to the steam introduction pipe 31.
[0041]
At this time, the steam passed through the HEPA filter 38 is not limited to the exhaust steam as described above, but a new heating steam having a predetermined capacity is introduced from a new steam supply source (not shown) into the front stage of the HEPA filter 38, After being mixed with the discharged steam, the steam having a required temperature and pressure is introduced into the steam inlet 22a through the HEPA filter 38. The HEPA filter 38 is fed with 0.5 MPa steam from a new steam supply source. The temperature and pressure of the steam passing through the steam introduction pipe 31 are always detected. In the present embodiment, in the first set of steam heating devices 10 described above, the temperature of the steam introduced into the steam inlet 22a is 120. The temperature is set to ° C., and steam at 150 ° C. is fed into the second and third sets of steam heating devices 10.
[0042]
In this embodiment, as described above, the amount of steam supplied from the new steam supply source to the HEPA filter 38 is constant, and therefore the amount of exhaust steam supplied to the HEPA filter 38 is also set constant during normal operation. Excess discharged steam is exhausted through the discharge path 39 at the upstream side of the drain line 43 and the pre-filter 37. Here, when the temperature of the steam introduced into the steam inlet 22a for some reason deviates from the set temperature, the control unit (not shown) determines the amount of exhaust steam and the new steam amount for setting the set temperature. The mixing ratio is calculated, the opening / closing amount of an opening / closing valve (not shown) provided in the discharge passage 39 and the new steam supply conduit 40 is adjusted, the amount of discharged steam sent to the HEPA filter 38 is adjusted, and the steam introduction port 22a. The temperature of the steam sent to is set to the set temperature.
[0043]
Thus, according to the steam heating apparatus 100 of the metal endless belt 101 in the belt machine of the present invention, the single steam heating chamber 10 can be obtained by employing the steam heating chamber 10 of the present invention as described above. However, the heating area of the endless belt that travels as compared with the conventional case can be widened, and the heating area can be evenly heated without heat dissipation. Also, the steam heating chamber 10 efficiently heats the endless belt 101 with almost no leakage of the steam ejected from the second chamber 21 to the outside due to its structure.
[0044]
Furthermore, in the present invention, as described above, most of the heated steam ejected to the endless belt 101 is actively sucked and discharged from the first chamber 11, and the sucked steam is the steam inlet 22 a of the second chamber 21. Since the steam is returned to and circulated to the steam introduction pipe 32 connected to, the loss of heat energy can be minimized. Further, in order to raise the temperature of the steam whose temperature returned by circulation is lowered, a new superheated steam is joined in the middle of the steam introduction pipe 31 to change the temperature of the steam introduced into the steam introduction pipe 31. The temperature is raised to a preset temperature. At this time, the new superheated steam supplied to the steam introduction line 31 is usually heated steam heated under high pressure up to 158 ° C., and the steam is also used for other purposes in the factory. Since this is often possible, the amount of heat consumed at this time is greatly reduced compared to the amount of heat consumed to convert water into superheated steam.
[0045]
The above is a description of typical embodiments of the present invention, and the present invention is not limited to these embodiments. For example, the belt machine is not limited to a single belt machine, and can be applied to various belt machines in which a double or three or more endless belts are used, and the steam jet nozzle of the steam superheat chamber is also limited to the above-described embodiment. Instead, a large number of small holes may be formed in a staggered manner, and the steam circulation circuit can be variously modified.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a typical embodiment of a steam heating chamber according to the present invention.
FIG. 2 is a side view schematically showing an example of a single belt machine provided with the same steam heating chamber.
FIG. 3 is a circuit diagram showing an example of a steam circulation circuit for steam heating by the steam heating chamber.
[Explanation of symbols]
10 Steam heating chamber
11 First chamber
12-15 Front and rear side walls
16 Bottom wall
16a Steam outlet
16b Pipe entry
17 Continuous piece made of synthetic resin
21 Second chamber
22 Box body
22a Steam inlet
23 Steam jet nozzle
24 slits
24a Tongue piece
25 Hollow body
26 Synthetic resin short pieces
30 Steam exhaust line
31 Steam introduction pipeline
32 Circulation exhaust fan
33 Circulation fan
34 Discharge side pipeline
35 Discharge side pipeline
36 Filtration unit
37 Prefilter
38 HEPA filter
39 discharge channel
40 New steam supply line
41 Temperature detector
42 Pressure gauge
43 Drain pipeline
44 Collecting hood
100 single belt machine
101 endless belt made of metal
102 Followed drum
103 Driving drum
104 Gear pump
105 T-die
106 Steam heating unit
A Processing area (of work piece by belt)

Claims (7)

A heating chamber applied to a belt machine that heats a workpiece with a heat medium via a metal endless belt that is wound around and rotates on a plurality of drums,
A first chamber having a heat medium discharge port connected to an external heat medium suction source, the box having an open surface facing the metal endless belt;
The first chamber and the metal endless belt are accommodated in the chamber with a required gap, and have one or more heat medium ejection nozzles on the open surface side of the first chamber and connected to an external heating supply source. A second chamber having a heat medium introduction port,
The heat medium ejection nozzle has a heat medium ejection port that ejects the heat medium over the entire belt width of the metal endless belt.
A heating chamber for a belt machine. 2. The heating chamber according to claim 1, wherein the heat medium ejection port includes one or more heat medium ejection slits arranged linearly extending in the belt width direction at a predetermined interval in the traveling direction of the endless belt. 2. The heating chamber according to claim 1, wherein the heat medium ejection port includes a plurality of heat medium ejection holes arranged in a staggered pattern. The heating chamber according to any one of claims 1 to 3, wherein a synthetic resin having a low friction coefficient is disposed on at least a part of the periphery of the heat medium outlet. The heating chamber according to any one of claims 1 to 4 is applied, and a heatless medium ejected from the heating chamber is used to heat a metal endless belt of a belt machine that is wound around and rotated on a plurality of drums. A belt heating method,
Introducing a heat medium at a required temperature into the second chamber from an external heating supply source through the heat medium inlet;
Spraying the heat medium introduced into the second chamber toward the non-processed surface of the endless belt running from the heat medium spray nozzle;
Discharging the heat medium ejected to the endless belt from the heat medium discharge port of the first chamber through a gap formed between the first and second chambers;
A method for heating a metal endless belt of a belt machine, comprising: Returning the heat medium discharged from the heat medium outlet to the heat medium inlet;
Detecting the temperature of the heat medium in the middle of returning to the heat medium inlet, and heating the circulating heat medium in the middle of the return based on the detected value;
The method for heating a metal endless belt according to claim 5, further comprising: The metal endless belt is arranged by using a heating chamber according to any one of claims 1 to 4, wherein the metal endless belt is disposed toward a running surface of a metal endless belt of a belt machine that is wound around a plurality of drums and rotates. A heating device for heating,
A connecting pipe connecting the heat medium outlet of the first chamber and the heat medium inlet of the second chamber;
A heat medium suction means disposed on the downstream side of the heat medium discharge port in the connecting pipe;
A heating unit disposed between the heat medium suction means and the heat medium inlet of the connection pipe;
A heat medium temperature detection unit disposed between the heating unit and the heat medium inlet in the connection pipe;
An apparatus for heating a metal endless belt for a belt machine.

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