JPH026438B2 - - Google Patents

Abstract

The invention concerns a roll (12) comprising two superposed webs (6, 7) of material one (6) of which is formed with transverse ridges (10). At the ridge bases and tops are formed indentations (22). The other web (7) is provided with ribs (27) which are positioned in nesting relationship in the indentations, whereby the webs are secured to one another. The invention likewise concerns a method and a machine for manufacturing rolls of this kind.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a thermal flow-through roll obtained by winding two webs having corrugated shapes by engaging and superimposing them, a manufacturing method thereof, and an apparatus thereof. This thermal once-through roll is primarily intended for use in so-called regenerative heat exchangers.

(Prior Art) A smooth web and a corrugated web of metal foil, usually aluminum foil, are wound in superimposed relation, and the two are bonded together by a composite adhesive or bonding agent.
It is known to combine two webs to produce rolls for rotary heat recovery devices.

SUMMARY OF THE INVENTION To wind two webs together, their inner ends are secured to a rotationally driven core sleeve. The smooth web is unwound from the supply roll onto a spindle equipped with a braking mechanism. In this manner, the web is wound into a roll under tension from the smooth web supply roll. Since the torque delivered by the core sleeve increases with increasing diameter of the winding roll,
The adhesive bond between the smooth web and the ridges of the corrugated web is subject to some tension braking in the smooth web due to the braking force exerted by the unwinding spindle, so that one or more turns of the web are ,
They will be separated from each other. As a result, the entire roll will collapse when transferred into a curing oven for adhesive curing. After the bond breaks, a sufficient amount of bonding agent remains on the ridges of the corrugated web to bond the ridges to the smooth web, but the adhesive on the smooth web at the initial point of bonding is in this case between the ridges. The disadvantage is that the cross-sectional area of the air passage through the rotary drive roll of the heat recovery device is reduced.

The aim of the invention is to completely eliminate the gluing operation while providing a more efficient heat exchange than in conventional roll mounted heat exchangers.

SUMMARY OF THE INVENTION According to the invention, the core sleeve comprises two superimposed webs of material wound around the core sleeve, the first of said webs having lateral and equidistantly spaced In a roll for thermal cross flow in which a ridge is provided and a vertical rib is provided on the second web, the ridge of the first web is provided with recesses at the ridge top and the ridge base. A feature of the heat transfer roll of the present invention is that the recess has a pitch that matches the pitch of the ribs, and the recess fits with the rib formed on the second web.

The invention further relates to a method for manufacturing a thermal flow-through roll, which method comprises forming recesses in the ridges by passing the first web through rollers of a corrugating station and a recess forming station, respectively. , forming a rib by passing a second web through a pair of rollers and guiding at least one of the webs to ensure that the rib is located in the recess. A feature of the method of the invention is that the ribbed web is heated before winding to ensure that the web shrinks and is secured to one another during subsequent cooling of the roll. be.

Furthermore, the invention also relates to an apparatus for manufacturing thermal flow-through rolls, which apparatus comprises first means 26 arranged to form longitudinal ribs on the second web during its advancement; a second means for forming a recess at the top and base of the ridge of the web when the first web is advanced; and a second means disposed so that the recess has a pitch that matches the pitch of the rib; third means 29 arranged to control the first web and/or the second web to fit into the recesses in the first web; and third means 29 arranged to control the first web and/or the second web so as to fit into the recesses in the first web; and a fourth means arranged. The feature of this device is that a roller that instantaneously detects the outermost layer of the roll being formed is rotatably attached to the lower end of the arm, and the arm is moved in the direction of the end piece opposite to the roll by applying lateral pressure. The end piece is moved toward and away from the core sleeve along the guide means, with a pressing member arranged to engage the core sleeve, and is further provided with a drive shaft.
The pressing member has a portion made of an elastic material such as rubber, and the pressing member is a roller-shaped member, and when the member moves with the detection roller, the end portion The point is that the pieces are arranged to be elastically pressed inward to exert a lateral pressure on the roll.

(Function) In the method for manufacturing a thermal flow-through roll of the present invention as defined in claim 3, the features of this method are as described below. A first web 6 formed with a horizontal ridge 10 shown in FIG. 1 and a second web 7 formed with a vertical rib 27.
When the second web 7 is wound in the winding station 11, the second web 7 is heated by the heating device 28 before entering the winding station 11, and the web is wound in the heated state, so that the second web 7 The vertically corrugated ribs 27 are fitted into the recesses 22 provided at the upper and lower edges of the horizontal ridge portion 10 of the first web 6, but after the winding is completed, the winding roll 12 is removed from the winding station 11. When removed and cooled, shrinkage causes the mating joint of both webs to become firmly fixed.

In the apparatus for manufacturing a thermal flow-through roll of the present invention as defined in claim 5, the features of this apparatus are as described below. Referring to FIGS. 8 and 9, when the two webs 6 and 7 are wound, the webs overlap each other,
The rib 27 fits into the recess 22. As the web is wound in sequence onto the core sleeve 36, the sensing roller 62 gradually rises with the top layer of the winding roll 12, and the arm 60 and the pressure roller 5
4 and a guide rod 56 including the guide rod 56. Upon rotation of the end piece 30, the piston 49 moves past the pressure roller 54, so that the piston 49 is pressed inwardly by the pressure roller 54 and comes into contact with the round disk 47 of elastic rubber; The disc 47 then projects inwardly into the space 61 between the end pieces 30, 31 in a slightly arched manner. This protrusion exerts a lateral pressure on the winding rolls 12 of the most recently formed webs 6, 7, thereby fixing these winding rolls 12 in position between the end pieces. Ru. This means that the traction force exerted by the shaft 32 is transferred directly to these newest winding rolls 12 and that the ribs 27 and the braking mechanism provided on the unwinding spindle 3 (FIG. 1) This means that the tensile stress caused by the web 7 being kept under tension is removed by the friction of the webs 6, 7 against the end pieces 30, 31. Thus, the innermost web winding roll 12 relative to the core sleeve 36 is loosened. the result,
Winding roll 1 already wound on the core sleeve 36
2 is compressed, internal distortion due to engagement between the rib portion and the recessed portion of the ridge portion is eliminated, and proper winding can be achieved.

(Example) Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

In FIG. 1, spindles 2, 3 are rotatably mounted at each end of an elongated stand 1, each supporting a supply roll 4, 5 of smooth aluminum foil webs 6, 7. Furthermore, this stand 1
A station 8 that imparts a corrugation to the material web 6 and a ridge 10 in the corrugated web (FIG. 11)
a station 9 for forming recesses at the top and base of the roll 1;
2 station 11 is supported.

Referring to FIG. 2, the corrugating station 8
consists of two rotationally driven cooperating rollers 13, 14 having the appearance of cogwheels, between which the material web 6 is guided to form a transverse ridge 10.

As shown in FIG. 1, a station 9 for forming recesses at the top and base of the ridge 10 is installed after the corrugating station 8.

Referring to FIGS. 3-5, station 9-2
Two cogwheel rollers 15, 16 and two back-up rollers 17, 18 are shown. The latter is provided with a peripheral bead 19 (FIG. 5) having a shape that matches the shape of the notch 20 formed on the top of the cogs 21 of the cogwheel rollers 15,16. Recesses 22 are formed in the ridge top and ridge base for the flow of material into the press nips formed by the respective rollers 15, 17 and 16, 18.

Referring to FIG. 12, the recesses 22 at the top and base of the ridge 10 are displaced relative to each other by a distance corresponding to a half-pitch, so that the internal flow area is
It is maintained constant over the entire length of the channel A thus formed (FIG. 13).

Returning to FIG. 1, attach the support plate 23 to the station 9.
The corrugated web 6 is placed after the support plate 23 and is advanced while freely sliding on the support plate 23. The web 6 further advances past a pair of guide rollers, ie master rollers 24, 25, located in front of the winding station 11. These rollers 24, 25 are
Regarding the winding speed of the roll 12, the rollers 13,1
Adjust the rotation speed of step 4.

A smooth web 7 is advanced from its supply roller 5 . This web 7 is moved between a pair of cooperating rollers 26
(similar to rollers 17, 18), these rollers 26 are provided with a peripheral bead for forming ribs 27 (FIG. 11) in the web 7. The pitch of the ribs 27 is the same as the pitch of the recesses 22 formed at the top and base of the ridge 10. Furthermore, the web 7 passes through a heating device 28, which preferably consists of two nozzles communicating with a hot air source (not shown). Before reaching the winding station 11, the web 7 is guided by an alignment mechanism 29 to laterally align it, so that the ribs 27 of the web 7 are received in the recesses 22 of the web 6 in a mating relationship. As the web 7 is heated, it contracts when cooled, thus safely and securely adhering the two webs 6, 7 forming the roll 12 to each other.

Referring to FIGS. 7-9, winding station 1
1 consists of two coaxial and rotatably mounted end pieces 30, 31. These end pieces 30,
The distance by which the ribbed webs 31 are separated in their associated positions is approximately equal to the width of the material webs 6, 7;
Slightly narrower than the width of the corrugated web 6 (preferably 2
mm narrow) width. One end piece 30
The shaft 32 of the bearing 33 in the stand 1
The shaft 32 is rotatably mounted and driven through a sprocket 34 at the outer end of the shaft 32. At the end opposite the sprocket 34, the shaft 32 is formed as a trunnion 35, into which the center sleeve 3 is attached.
6 and wind the material webs 6, 7 around this core sleeve 36. An inflatable clamping sleeve 37 secures the sleeve 36 to the trunnion 35 and includes a bolt 39 having a head 38.
is inserted axially into this clamping sleeve 37, and the opposed bolt end has an external thread that engages an internal thread formed on the tensioning sleeve 40, so that the tensioning sleeve 40 can be rotated in the shaft 32. However, it is prevented from moving in the axial direction.

The opposite end piece 31 is connected to the arm 4 by its axis 41.
3 (Figs. 1, 7), and the arm 43 is rotatably mounted on a bearing 42 at the outer end of the stand 1 (Figs. 1, 7).
It is arranged so that it can be pivoted outwardly by a lever 45 about the center of FIG. In the internal position (see Figures 6, 7, 8 and 9) the pin 46 on the shaft 41
It engages the free end of the center sleeve 36 (left end seen in FIGS. 8 and 9).

In the face facing the opposite end piece 31, the end piece 30 is provided with a round disc 47 of elastic material, such as rubber, which is secured to its inner and outer edges by means of screws 48 or equivalent members. The end piece 30 is attached to the surface of the end piece 30 itself. A number of pistons 49 are displaceably mounted on the end piece 30.

Referring to FIG. 10, the detailed structure of the piston 49 is shown, and each piston 49 has a head 5.
0 is provided and positioned in the recess 51. The recess 51 has an inner side in contact with the round disc 47.
formed in end piece 30. The free end 52 of the piston 49 projects beyond the rear surface of the end piece 30.

Referring to FIGS. 8 and 9, end pieces 30,
31 is rotated by the center sleeve 36, a pressure roller 54 rotates in contact with the back surface 53 of the end piece 30, which pressure roller 54 is rotatably mounted on a shaft 55 at the lower end of the guide rod 56. There is. The guide rod 56 is vertically displaceable by a guide 57 in a guide track 58 formed in a column 59 mounted above the bearing 33 . The guide rod 56 is connected to an arm 60 inserted into a hole 61 between the end pieces 30 and 31, and a detection roller 62 is rotatably attached to the lower end of the arm at approximately the same level as the pressure roller 54. do.

When the arms 43 are pivoted outwardly (see FIGS. 1 and 6) and the center sleeve 36 is in place, resting one end on the trunnion 35 and securing the clamping sleeve 37 thereto. , the ends of the material webs 6, 7 are attached to the core sleeve 3 by means of adhesive.
It is fixed at 6. Starting the drive mechanism of the device causes rotation of the core sleeve 36 and end pieces 30, 31.
As a result of the rotation, winding of the web onto the core sleeve 36 is initiated. The two webs 6 and 7 overlap each other, and the rib 27 fits into the recess 22. As the web is sequentially wound onto the core sleeve 36, the sensing roller 62 detects the winding roll 12.
gradually rises with the top layer of the roller, entraining an arm 60 and a guide rod 56 containing a pressure roller 54. Upon rotation of the end piece 30, the piston 49 moves past the pressure roller 54 and thus the piston 49
is pressed inwardly by pressure roller 54 into contact with round disc 47, which then arches slightly and projects inwardly into 61 between end pieces 30, 31. do. This protrusion exerts a lateral pressure on the winding rolls 12 of the most recently formed webs 6, 7, thereby fixing these winding rolls 12 in position between the end pieces. Ru. This means that the traction force exerted by the shaft 32 is transferred directly to these newest winding rolls 12, which are provided with ribs 27 and held in tension by the braking mechanism provided on the unwinding spindle 3. This means that the tensile stresses caused by the web 7 being held are removed by the friction of the webs 6, 7 against the end pieces 30, 31. Thus, the innermost web winding roll 12 relative to the core sleeve 36 is loosened. As a result, there is no risk that the wound roll 12 already wound onto the core sleeve 36 will be compressed.

Referring to FIGS. 6 and 7, the winding roll 12
When the winding is completed and the outer winding web is fixed to the winding web below it by means of adhesive, the arms 43 are again pivoted outwards (see also FIG. 1);
The pressure on the clamping sleeve 37 (see Figures 8 or 9) is released. Next, the winding roll 12
can be removed from the device together with the core sleeve 36. Then, when the winding roll 12 is cooled to room temperature, the ribbed web shrinks due to cooling, resulting in the above-described fixation of the web. The interlocking of the webs means that the finished wound roll 12 cannot collapse.

Referring to FIGS. 12 and 13, the ribs 27 and recesses 22 form a flow channel A for the medium flowing through the heat exchanger. This shape provides an enlarged heat flow area and means that the flow in channel A is turbulent and not laminar. In laminar flow (which would occur if the limiting surfaces of the channel were perfectly straight), the layer of medium flowing closest to the limiting surfaces acts as an insulating layer;
Residual media is prevented from contacting the surfaces of these insulation layers. The turbulence generated in the channel of the winding roll according to the invention means that it allows most of the medium to come into close contact with the critical surface. The effect of this phenomenon and the effect of increasing the heat flow area in channel A as a result of providing the ribs 27 result in a significant improvement in the efficiency of the heat exchanger.

(Effects of the Invention) As described above, the heat once-through roll according to the present invention differs from the conventional heat once-through roll in which a smooth web and a corrugated web are fixed and combined with an adhesive, in that the heat once-through roll has a structure in which the recesses and ribs fit together. By fixing with
The fluid flow in the rolls can provide a significantly more efficient heat exchanger due to the enlarged heat transfer area as well as the superior heat transfer effect under turbulent flow.

Although preferred embodiments of the present invention have been described above with reference to examples, the present invention is not limited to these examples, and the design of various parts of the device may be changed in various ways within the scope of the present invention. You can also do it.
For example, the outer roller 54 of the end piece 30 can be replaced by a slip shoe supported by a guide rod 56. It is also possible to attach a round disc 47 of elastic material to the opposite end piece 31. The slip shoe can have a length and/or width such that it presses two or several pistons 49 simultaneously. Additionally, there are other ways to loosen the innermost wound web. Arrangements involving the use of air-actuated pistons transmitting the traction force to the outermost wound web are likewise possible.

[Brief explanation of drawings]

FIG. 1 is an illustration of an apparatus according to the invention designed to produce a winding roll consisting of two superimposed and interconnected material webs; FIGS. 5 is a side view of the station shown in FIG. 4; FIGS. 6 and 7 are plan views showing one of the ends of the winding station in different positions; FIG. Figure 9 is an enlarged vertical cross-sectional view of the winding station at the early stage of winding, and Figure 9 is an enlarged longitudinal cross-sectional view of the winding station at the later stage of winding.
10 is an enlarged sectional view of the outer edge of the rotary drive end of the winding station; FIG. 11 is a perspective view of a part of the winding roll;
Fig. 2 is an enlarged sectional view of a part of the winding roll, and Fig. 13 is a view of Fig. 12 in the longitudinal direction of the winding roll.
The line sectional view and FIG. 14 are partially cut away end views of the winding roll. 1...stand, 2, 3...spindle, 4,
5... Supply roll, 6, 7... Web, 8... Corrugating station, 9... Recess forming station, 10... Ridge section, 11... Winding station,
12... Roll, 13, 14... Fitted gear roller,
15, 16... Fitted gear roller, 17, 18... Back-up roller, 19... Peripheral bead, 20...
...Notch, 21... Fitting tooth, 22... Recess, 23
...Support plate, 24, 25...Guide roller, 26...
... Cooperation roller, 27 ... Rib, 28 ... Heating device, 29 ... Alignment mechanism, 30, 31 ... End piece,
32... Shaft, 33... Bearing, 34... Sprocket, 35... Trunnion, 36... Core sleeve, 37... Clamp sleeve, 38... Bolt head, 39... Bolt, 40... Tension sleeve, 41...shaft, 42...bearing, 43...
Arm, 44... Vertical axis, 45... Lever, 46
...Pin, 47...Round disc, 48...Screw, 4
9... Piston, 50... Head, 51... Recessed part,
52... Free end, 53... Back, 54... Roller, 55... Shaft, 56... Guide rod, 57... Guide, 58... Guide track, 59... Column, 60...
...Arm, 61...Diameter, 62...Detection roller,
A...Channel.

Claims (1)

Claims: 1 Consists of two superimposed webs of material 6, 7 wound around a core sleeve 36, the first of said webs 6 having laterally equally spaced ridges 10; In the roll 12 for thermal flow, in which the second web 7 is provided with vertical ribs 27, the ridge portion 10 of the first web 6 is provided with recesses 22 at the ridge top and the ridge base, and the recesses 22 are provided at the ridge top and the ridge base. 22 has a pitch that matches the pitch of the rib 27, and the recess 22
A thermal flow-through roll that fits into the rib 27 formed on the second web. 2. The thermal flow through roll according to claim 1, wherein the recess 22 formed at the top of the ridge 10 is displaced by half a pitch with respect to the recess 22 formed at the base of the ridge. 3 consisting of two superimposed webs of material 6, 7 wound around a core sleeve 36, the first of said webs 6 being provided with laterally equidistantly spaced ridges 10 and the second The web 7 of the first web 6 is provided with a vertical rib 27, and the ridge 10 of the first web 6 is provided with a recess 22 at the top and base of the ridge, and the recess 22 has a pitch that matches the pitch of the rib 27. , the recess 22 is formed by passing the web 6 through the rollers of the corrugating station 8 and the recess forming station 9, respectively, in the method for manufacturing a thermal flow roll that fits into the rib 27 formed on the second web. By forming a recess 22 in the rib 10 and passing the web 7 through a pair of rollers, the rib 2
7 and guiding at least one of the webs 7 to ensure that the ribs 27 are located in the recesses 22, the method comprising heating the web 7 with the ribs 27 before winding. , during subsequent cooling of the roll 12, the web 7 is shrunk, and the web 6,
1. A method for producing a thermal flow-through roll, comprising: ensuring that the 7 rolls are fixed to each other. 4. The webs 6, 7 are wound between the two end pieces 30, 31 rotating together with the sleeve 36, at least one of the end pieces 30, 31 is driven, and at least one of the webs 6, 7 is wound. On the other hand, preferably, the web 6 provided with the ridge 10 is rotated while being fixed between the end pieces 30 and 31 during the winding operation. How to make rolls. 5 consisting of two superimposed webs of material 6, 7 wound around a core sleeve 36, the first of said webs 6 being provided with laterally equally spaced ridges 10 and the second In the heat transfer roll 12 in which the web 7 is provided with longitudinal ribs 27, the ridge portion 10 of the first web 6 is provided with recesses 22 at the ridge top and the ridge base, and the recesses 22 correspond to the pitches of the ribs 27. It has a pitch that matches the recess 22.
2 is an apparatus for manufacturing a thermal flow-through roll that fits into the ribs 27 formed on the second web, and includes a first means 26 arranged to form the longitudinal ribs 27 on the second web 7 when the second web 7 advances; , When the first web 6 moves forward, a recess 22 is formed at the ridge top and the ridge base of this web 6, and the recess 2
second means 15 to 18 arranged such that the second means 15 to 18 have a pitch that matches the pitch of the rib 27; or third means 29 arranged to control the second web 7;
and a fourth means 11 arranged to fix the roll in a predetermined position between the end pieces 30, 31 and wind it appropriately.
This device includes a roller 62 that instantaneously detects the outermost layer of the roll 12 being formed, and an arm 6.
The arm 60 is rotatably mounted on the lower end of the roll and is moved along the guide means 57, 58 against the core sleeve 36 with a pressing member arranged to apply a lateral pressure in the direction of the opposite end piece 31 against said roll. The drive shaft 32
The end piece 30 with A device characterized in that the end piece portion 47 is arranged to elastically press inwardly at a point facing the roller 62 and exert a lateral pressure on the roll. 6 The means for forming the longitudinal ribs 27 on the second web 7 are two cooperating rollers 26 with peripherally extending beads, the beads on one roller being located at the bottom between the beads of the second roller. 6. Apparatus according to claim 5, characterized in that they engage to form a press nip through which the web 7 passes. 7 The means for forming the recess 22 at the top and base of the ridge 10 in the first web 6 is formed by a notch 20 formed at the top of the tooth 21 of the fitted gear roller 16 rotatably mounted, and a fitting. A roller 18 with gear rollers mounted in parallel and with a peripheral bead 19 formed thereon.
and a press nip is formed by mounting the second roller 18 so that the bead 19 of the second roller 18 fits into the notch 20 formed in the fitted gear roller 16 when the two rollers rotate; 6. The apparatus according to claim 5, wherein the first web 6 is passed through the apparatus. 8. A rotationally driven end piece 30 has a shaft 32 on which the core sleeve 36 is mounted and one end thereof is fixed to said shaft, while the opposite core sleeve end is provided with an opposite rotatably mounted core sleeve 36. End piece 31
The webs 6, 7 are supported by pins 46 formed in the core sleeve 36, and also apply lateral pressure to at least one of the webs 6, 7 as they are wound onto the core sleeve 36, and also apply lateral pressure to at least one of the webs 6, 7, while the webs are supported by pins 46 formed in the end piece 30, 6. Apparatus according to claim 5, further comprising means fixed between 31 and arranged to entrain said web during rotation of the end piece.