JP4963042B2 - Heat transfer roller - Google Patents

Description

  The present invention relates to a roller that heats or heat-treats a processed object such as a resin film using a fluid as a heat medium.

  A treatment object such as a resin film is placed on a roller, and the treatment object is heated to a predetermined temperature while passing through the roller, or the high temperature treatment object is deprived to a predetermined temperature. . When heat treatment is performed, the roller is heated to a temperature required for the heat treatment. When heat treatment is performed, the temperature of the roller itself increases due to heat removal from the processed material. Cooling. In either case, a medium for transferring heat is required, and a fluid such as oil is used as the medium. That is, a fluid having an appropriate temperature is allowed to pass through the inside of the roller, and the roller is heated or deprived from the roller by this fluid (hereinafter, such a roller is referred to as a heat medium flow roller).

  FIG. 4 shows a schematic configuration of an example of such a heat medium flow roller. In FIG. 4, 1 is a roll shell, 2 is a rotary drive shaft, 3 is a core, 4 is a rotary joint, and 5 is an oil storage tank. , 6 is oil (heat medium fluid), 7 is a heat exchanger for heating or cooling, 8 is a temperature sensor, 9 is a pump, and 10 is a processed object such as a resin film. The roll shell 1 has a cylindrical shape, and a core 3 is disposed inside the hollow shell, and a heat medium passage 3 a is formed through the center of the core 3. The heat medium flow path 3 a is connected to the inlet of the rotary joint 4 through the rotary drive shaft 2, and is formed between the inner peripheral wall of the roll shell 1 and the outer peripheral wall of the core 3. Is connected to the outlet of the rotary joint 4 through the rotary drive shaft 2.

  That is, the oil 6 in the oil storage tank 5 passes through the heat exchanger 7 for heating or cooling, is brought to a predetermined temperature, is sent into the roll shell 1 by the pump 9, and flows through the heat medium passages 3a and 1a. 6 is discharged to the oil storage tank 5. The roll shell 1 is maintained at a predetermined temperature while mainly flowing through the heat medium passage 1a, and heats or removes the processed material 10 that is in contact with the surface of the roll shell 1.

  As such a roller for heating or removing heat, a heat medium flow roller shown in FIG. 5 has been developed. That is, in FIG. 5, 11 is a roll shell, 12 is a rotary drive shaft, 13 is a sealed chamber, 14 is a heat medium flow pipe, and 15 is a heat medium forming a gas-liquid two phase. The roll shell 11 has a cylindrical shape, and both end portions in the longitudinal direction are connected and fixed to the flange 12 a of the rotary drive shaft 12. The sealed chamber 13 is formed with a hole in the wall thickness of the roll shell 11, for example, by drilling in the longitudinal direction from the longitudinal edge of the roll shell 11, and an appropriate amount of water serving as a gas-liquid two-phase heat medium in the hole. 15 is injected to close the opening, and a plurality of rollers are provided in the outer circumferential direction of the roller at appropriate intervals.

  The heat medium flow pipe 14 penetrates the inside of the sealed chamber 13 along the longitudinal direction, and extends to both edges of the roll shell 11 in the longitudinal direction. A heat medium flow hole is formed in the rotary drive shaft 12 and its flange 12a, and the heat medium flow pipe 14 communicates with the heat medium flow hole. That is, the heating medium fluid 6 such as oil for heating or depriving the roll shell 11 fed through the heating or cooling heat exchanger 7, the pump 9 and the rotary joint 4 shown in FIG. It passes through the heat medium flow pipe 14 via the heat medium flow hole of the rotary drive shaft 12 and its flange 12a, and is discharged to the oil storage tank via the heat medium flow hole and the rotary joint of the other flange 12a and the rotary drive shaft 12. The

When the roll shell 11 is heated by the heat medium fluid or the processed material, the heat medium 15 in the sealed chamber 13 is heated and vaporized, the gas moves to a low temperature portion, the gas releases heat and liquefies, This operation is repeated, and even if there is a temperature difference between the entrance and exit of the heat transfer fluid due to this latent heat transfer, the temperature becomes substantially uniform in the longitudinal direction along the axis of the roll shell 11. As a result, the flow rate of the heat transfer fluid can be greatly reduced, and it is possible to reduce equipment costs by adopting small pipes and pumps, achieving energy savings by reducing the heat radiation of the pipes and the pump capacity. can do.
JP 2004-116538 A

  However, since the sealed chamber that encloses the heat medium forming the gas-liquid two-phase is formed by drilling a hole in the thick part of the roll shell, the distance from the inner wall of the sealed chamber to the surface of the roll shell However, there are problems that the temperature distribution differs depending on the location of the surface of the roll shell, and that the temperature distribution between the entrance and exit of the heat transfer fluid slightly varies due to the subtle uneven temperature distribution.

  The problem to be solved by the present invention is to make the distribution of the surface temperature of the roll shell more uniform and to reduce the influence on the roll shell due to the temperature difference between the inlet and outlet of the heat transfer fluid. The point is to solve the problem.

The present invention has a Netsunakadachidori channel flowing through the heat transfer fluid sent through the rotary joint, heat or deactivating the treatment product in contact with the surface by the heating fluid medium flowing through the heating medium flow path A hollow cylindrical heat medium flow roller to be heat-treated, and the hollow cylindrical roll shell constituting the roller constitutes an outer peripheral surface of the roll shell on an outer periphery of a tube constituting the inner peripheral surface of the roll shell. A double pipe formed by overlapping the pipes, and along the longitudinal direction and the circumferential direction of the roll shell, between the outer peripheral surface of the pipe constituting the inner peripheral surface and the inner peripheral surface of the pipe constituting the outer peripheral surface extending to form a sealed chamber enclosing the heat medium in the gas-liquid two-phase heating medium flow connecting the helical flowing through the heat transfer fluid on the outer circumferential surface of the pipe constituting the inner peripheral surface of the sealed chamber The main feature is that it is wound around.

  In the present invention, the roll shell has a double tube configuration in which a tube constituting the inner periphery and a tube constituting the outer periphery are overlapped, and a sealed chamber for enclosing a gas-liquid two-phase heat medium is formed between the overlaps, Since the spiral heat medium flow pipe is wound around the outer circumference of the pipe that constitutes the inner circumference and is located in the sealed chamber, the wall thickness of the pipe that constitutes the inner circumference and the pipe that constitutes the outer circumference is uniform. In addition, there is no gap between the sealed chambers such as drill holes, so that the inner and outer surface temperatures of the roll shell can be made uniform. Uniform thermal expansion reduces the mechanical accuracy of the roller.

  For the purpose of making the surface temperature distribution of the roll shell more uniform and reducing the influence on the roll shell due to the temperature difference between the inlet and outlet of the heat transfer fluid, the roll shell is configured on the inner periphery. A double-pipe structure in which a pipe and a pipe constituting the outer periphery are overlapped, and a sealed chamber for enclosing a gas-liquid two-phase heat medium is formed between the two layers, and the pipe that constitutes the inner circumference is located in the sealed chamber. This was realized by winding and arranging a spiral heat medium flow tube along the outer periphery.

  Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a longitudinal sectional view of a heat medium flow roller according to the embodiment. In FIG. 1, 21 is a roll shell, 22 is a rotary drive shaft, 23 is a sealed chamber, and 24 is a heat medium flow pipe. The roll shell 21 is configured by superposing a tube 21a constituting the outer periphery and a tube 21b forming an inner periphery having convex portions at both ends, and the sealed chamber 23 is formed by a concave portion at the center portion by the convex portions.

Netsunakadachidori flow tube 24 is wound wound spirally on the outer periphery of the recess of the tube 21b constituting the inner peripheral end portions of both sides is connected to a rotary joint (not shown), respectively. That is, the heat medium fluid flowing in from one rotary joint flows through the spiral heat medium flow pipe 24 and is discharged from the other rotary joint and flows through the spiral heat medium flow pipe 24. Then, heat exchange with the roll shell 21 is performed via the gas-liquid two-phase heat medium in the sealed chamber 23. In this case, if the fins 25 are provided in the heat medium flow pipe 24 as shown in FIG. 2, the heat exchange efficiency can be increased. In addition, as shown in FIG. 3, an induction heating mechanism including an induction coil 27 wound around an iron core 26 may be provided in the hollow of the roll shell 21. In this case, an alternating current is appropriately passed through the induction coil 27 to cause the roll shell 21 to generate Joule heat, thereby increasing the response speed of the entire roll shell 21 to temperature fluctuations.

It is sectional drawing which shows the heat-medium flow roller which concerns on the Example of this invention. It is a perspective view which shows the structure of the heat-medium flow pipe which concerns on one Example of this invention. It is sectional drawing which shows the heat-medium flow roller which concerns on the other Example of this invention. It is a block diagram which shows one structure of a heat-medium flow roller. It is a longitudinal cross-sectional view which shows the conventional heat-medium flow roller.

Explanation of symbols

4 Rotary Joint 5 Oil Storage Tank 7 Heat Exchanger 8 for Heating or Cooling Temperature Sensor 9 Pump 10 Processed Material 21 Roll Shell 21a Tube 21b Constructing the Outer Circumference of the Roll Shell Tube 22 Constructing the Inner Perimeter of the Roll Shell Rotating Drive Shaft 23 Sealing Chamber 24 Heat transfer pipe 25 Fin 26 Iron core 27 Inductive coil

Claims (3)

A hollow cylinder having a heat medium flow path through which a heat medium fluid sent via a rotary joint flows, and heating or heat-treating a processing object abutting on the surface by the heat medium fluid flowing through the heat medium flow path The hollow cylindrical roll shell constituting the roller is formed by superposing the tube constituting the outer peripheral surface of the roll shell on the outer periphery of the tube constituting the inner peripheral surface of the roll shell. A gas-liquid two pipe is formed between the outer peripheral surface of the pipe constituting the inner peripheral surface and the inner peripheral surface of the pipe constituting the outer peripheral surface along the longitudinal direction and the circumferential direction of the roll shell. to form a sealed chamber enclosing the heat medium phase, wound heating medium flow connecting flowing through the heat transfer fluid on the outer circumferential surface of the pipe constituting the inner peripheral surface of the sealed chamber in a spiral A heat medium flow roller characterized by that. The heat medium flow roller according to claim 1, wherein heat exchange fins are provided on the spiral heat medium flow pipe. 3. The heat medium flow roller according to claim 1, wherein an electromagnetic heat generating mechanism is provided in the hollow of the roller.

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