JP3226296B2 - Heating / cooling method using drum - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention relates to a method of heating and cooling work using a drum.

[0002]

2. Description of the Related Art Conventionally, works such as fibers, synthetic resins,
In order to heat and cool the belt-shaped member made of paper, rubber, or the like uniformly and efficiently, a drum through which a heat medium flows is used. , 6 are known. This is a cylindrical outer cylinder 12, an inner cylinder 14, which is loosely fitted inside the outer cylinder 12 while maintaining the coaxial relationship with the outer cylinder 12 to form a space 13 between the outer cylinder 12, an outer cylinder, Disc-shaped side plates 15, 16 attached to both ends of the inner cylinders 12, 14 in the axial direction to close the space 13, and are arranged so as to be separated from each other in the circumferential direction and extend in the axial direction in the space 13, Four partitions 18 that divide the space 13 into four chambers 17 that are circumferentially separated by connecting both ends to the side plates 15 and 16, and are separated from each other in each chamber 17 in the circumferential direction and are axially separated. And two partition plates 20 for partitioning each chamber 17 into a passage 19 bent in a crank shape, and a supply passage connected to the center of the side plate 15 and through which a heating or cooling heat medium passes. The heating shaft for heating or cooling passes through the rotation shaft 22 formed with 21 and the center connected to the center of the side plate 16 A rotary shaft 24 having an outlet passage 23 formed therein, four supply pipes 25 connecting the supply passage 21 to one end of each passage 19, and four supply pipes connecting the discharge passage 23 and the other end of each passage 19. And a discharge pipe 26.

When heating and cooling the drum 11, a heating or cooling heat medium is supplied to one end of each passage 19 through the supply passage 21 and the supply pipe 25 while rotating the drum 11. Flow through the passage 19. As a result, the heat of the heat medium is transmitted to the outer cylinder 12, and the outer cylinder 12 is heated or cooled to a predetermined temperature. The heat medium flowing to the other end of the passage 19 is discharged through the discharge pipe 26 and the discharge passage 23.

[0004]

However, in such a conventional drum 11, the passage through which the heat medium flows is provided.
Since 19 is bent in a crank shape and the flowing direction of the heat medium changes by 180 degrees over two degrees, the pipe resistance of the passage 19 increases, and the flow speed of the heat medium cannot be increased. As a result, there is a problem that heat exchange between the heat medium and the outer cylinder 12 is slowed, and response performance is deteriorated. Moreover, since it is difficult to make all the pipe resistances of the four passages 19 separated in the circumferential direction the same, a part of the outer cylinder 12 in contact with the passage 19 having a small pipe resistance is quickly heated and cooled. However, there is also a problem that a part of the outer cylinder 12 that is in contact with the passage 19 having a large pipe resistance is gradually heated and cooled, and the outer cylinder 12 has uneven temperature in the circumferential direction.

[0005] The present invention, Oyo temperature distribution in the drum
And uniform heating and cooling of the workpiece .

[0006]

In order to solve the problems] Such objects, Dora
Between the outer cylinder constituting the system and the inner cylinder loosely fitted in the outer cylinder.
By supplying a heat medium to the space and letting it flow spirally
Work to multiple heated and cooled drums
When heating and cooling the work by contacting it one after another,
The flow direction of the heat medium in the space is
And in the opposite direction .

[0007]

When heating or cooling the drum, a heating or cooling heat medium is placed in the space between the outer cylinder and the inner cylinder.
The liquid is supplied and allowed to flow spirally.
If it is passed, the change in the flowing direction becomes a fixed rate and a gradual change. As a result, the flow path resistance is reduced, and the flow speed of the heat medium can be greatly increased, and the heat exchange between the heat medium and the outer cylinder is quickly performed, and the response performance is improved.
Moreover, since the space covers the entire area of the outer cylinder, the entire area of the outer cylinder is uniformly heated and cooled, and the temperature distribution of the outer cylinder becomes uniform.

Here, since the temperature of the heat medium changes due to heat exchange with an outer cylinder or the like, a slight temperature difference occurs between both ends in the axial direction of the drum. For this reason, when a plurality of drums are installed, the flow direction of the heat medium in the space is set to the opposite direction in the adjacent drum, thereby reversing the temperature distribution of the drum in the adjacent drum, and Heating and cooling for

[0009]

An embodiment of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 31 denotes a rotatable drum, and the drum 31 has a thin cylindrical outer cylinder 32. A thin-walled cylindrical inner cylinder 33 is loosely fitted in the outer cylinder 32 while maintaining the same coaxial relationship with the outer cylinder 32.
A space 34 having a cylindrical shape is formed between the space 33. Reference numerals 37 and 38 denote a pair of disc-shaped connecting plates.
Is fixed to the inner circumference of one end of the inner cylinder 33 in the axial direction so as to be spaced apart in the axial direction. The outer circumference of the distal end of a rotating shaft 39 coaxial with the outer cylinder 32 is fixed to these connecting plates 37 and 38, and a supply passage 40 for supplying a heating or cooling heat medium is formed in the rotating shaft 39. ing. On the other hand, a pair of disc-shaped connecting plates 41 and 42 which are separated in the axial direction are fixed to the inner circumference of the other end of the inner cylinder 33 in the axial direction, and the rotating shaft 39 is attached to these connecting plates 41 and 42. The outer periphery of the distal end of the rotating shaft 43 coaxial with the shaft is fixed. A discharge passage 44 for discharging the heat medium after heating or cooling the drum 31 is formed in the rotating shaft 43. Also,
A ring-shaped side plate 47 is provided at both axial ends of the space 34,
48 are arranged, the outer ends of these side plates 47, 48 are fixed to the inner circumference of the outer cylinder 32, and the inner ends are fixed to the outer circumference of the inner cylinder 33, whereby both ends in the axial direction of the space 34 are sealed. . 50 is the space 34
This is a continuous strip-shaped partition placed inside the
Extends spirally while maintaining a constant pitch in the space. The outer end of the partition 50 is connected to the inner periphery of the outer cylinder 32, and the inner end is connected to the outer periphery of the inner cylinder 33, whereby the space 34 is partitioned into a single spirally extending passage 51. You. Here, one end of the partition 50 is connected to the side plate 47, and the other end is connected to the side plate 48. Reference numeral 53 denotes a supply connection pipe extending in the radial direction disposed between the connection plates 37 and 38. The supply connection pipe 53 connects the supply passage 40 and one end of the passage 51, and connects the heat medium to one end of the passage 51. To supply. On the other hand, a pair of discharge connection pipes 54 extending in the radial direction is also disposed between the connection plates 41 and 42, and the discharge connection pipe 54 connects the discharge passage 44 and the other end of the passage 51, and allows the heat medium to pass therethrough. Discharge from the other end of 51.

FIG. 3 shows a plurality of drums 31 (here, 6 drums).
This shows the installed heating / cooling device 60, and these drums 31 are arranged in parallel with each other so as to overlap each other, and are rotatably supported by a frame 61. Then, the workpieces 62 such as band-shaped rubbers move around the outer circumferences of the drums 31a, 31b, 31c, 31d, 31e, 31f while being in contact with each other, whereby the workpieces 62 are heated or cooled. here,
Among the drums 31, adjacent drums, that is, 31a and 31
b, 31b and 31c, 31c and 31d, 31d and 31e, 31e and 31f
The flow direction of the heat medium in the space 34 is opposite, for example, when the heat medium flows from the near side to the far side of the paper on the drum 31a, the drums 31b, 31d, 31
At f, the heat medium moves from the back of the paper to the front of the paper,
In the drums 31c and 31e, the heat medium flows from the near side of the drawing toward the back of the drawing like the drum 31a.

Next, the operation of the embodiment of the present invention will be described. When heating or cooling the drum 31,
Supply passage 40, supply connection pipe for heat medium for heating or cooling
It is supplied to one end of the passage 51 (space 34) through 53. Here, since the passage 51 extends spirally between the outer and inner cylinders 32 and 33 as described above, the heat medium also flows spirally toward the other end, and the flow direction of the heat medium changes. Will be a certain percentage of moderate. As a result, the pipe resistance (flow path resistance) of the passage 51 is reduced, so that the flow speed of the heat medium can be greatly increased, and the heat exchange between the heat medium and the outer cylinder 32 can be performed quickly. . As a result, the response performance of the drum 31 is improved, and the drum 31 can be quickly heated and cooled. For example, when a predetermined amount of a heat medium at a constant temperature is supplied and the time required to reach a predetermined temperature is measured, the drum of this embodiment has a heating time of about 0.58 times that of a conventional drum and a cooling time of about 0.5 times. The time was reduced to about 0.45 times. In addition, in this embodiment, since one passage 51 covers the entire range of the outer cylinder 32 (also in the circumferential direction), the entire area of the outer cylinder 32 is uniformly heated and cooled, and the temperature distribution of the outer cylinder 32 is Can be made uniform. The heating medium after heating and cooling the drum 31 is discharged to the discharge connection pipe 54, the discharge passage.
Emitted through 44.

When the work 62 is heated or cooled by the heating / cooling device 60 having the drum 31 heated and cooled in this way, the work 62 is moved and the outer periphery of each drum 31 is successively moved. Make contact. Here, in each of the drums 31, the temperature of the heat medium changes due to heat exchange with the outer cylinder 32 and the like.
Since the temperature of the cooling heat medium rises, a slight temperature difference occurs between both ends in the axial direction. Therefore, in this embodiment, the flow direction of the heat medium in the
The direction is reversed at 31, for example, drums 31a, 31c, 31e
Assuming that the air is flowing from the front of the paper toward the back of the paper, the drums 31b, 31d, and 31f flow from the back of the paper toward the front of the paper, so that the temperature distribution of the drum 31 is reduced by the adjacent drum 31. The heating and cooling of the work 62 are made uniform by reversing the rotation.

[0013]

As described above, according to the present invention, the temperature distribution in the drum and the heating and cooling of the work can be made uniform.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a drum showing an embodiment of the present invention.

FIG. 2 is a development view of a passage.

FIG. 3 is a side view of a heating / cooling device showing one embodiment of the present invention.

FIG. 4 is a front sectional view showing a conventional drum.

FIG. 5 is a sectional view taken on line II of FIG. 4;

FIG. 6 is a partial development view of a passage.

[Explanation of symbols]

 31 ... Drum 32 ... Outer cylinder 33 ... Inner cylinder 34 ... Space 50 ... Partition 51 ... Pathway 62 ... Work

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F26B 1/00-25/22 F28D 1/00-13/00

Claims (1)

(57) [Claims] 1. A loosely fitted is the outer tube and the outer cylinder constituting the drum
Heat medium is supplied to the space between the
By bulk, the plurality of drum heating and cooling,
A heating / cooling method using a drum, wherein the direction of flow of a heat medium in a space is reversed in an adjacent drum when heating and cooling the work by successively contacting the work while moving the work. .