JP4749041B2 - Heat treatment roller device - Google Patents

Description

  The present invention relates to a heat treatment roller device used for a process involving heat such as heating or deprivation.

  When the resin film is heated or heated to a predetermined temperature, an object to be processed such as a resin film is pressed against a rotating hollow roller body (hereinafter referred to as a roll shell) heated to a predetermined temperature. During the passage, heat treatment such as heating or deprivation is performed. In this case, an electromagnetic induction heating mechanism, a heating fluid, or a heater is used as a heat source for heating the roll shell, and the heat source is usually provided in the hollow of the roll shell along the longitudinal direction of the roll shell.

  In the roll shell, in order to prevent temperature spots present in the heat source in the longitudinal direction of the outer surface of the roll shell, a hole extending in the longitudinal direction with, for example, a drill or the like is formed in the thick portion near the outer surface of the roll shell. A plurality of chambers are formed in the circumferential direction, and a hermetic chamber is provided in which an appropriate amount of water or the like is injected into the hole under reduced pressure to seal the hole. In this way, by providing a sealed chamber in which a gas-liquid two-phase heat medium extending in the longitudinal direction is enclosed in the wall thickness near the outer surface of the roll shell, the heat medium in the sealed chamber takes heat away at a high temperature portion. Vaporizes, moves to a lower temperature part, releases heat, and liquefies. Due to the movement of the latent heat, temperature spots associated with the heat source can be prevented, the outer surface temperature of the roll shell can be made uniform, and the object to be processed can be uniformly heat-treated.

  By the way, the roll shell may be used for obtaining the smoothness and gloss of the surface of the object to be processed or for adjusting the thickness of the object to be processed. In this case, there are many so-called calendering processes in which an object to be treated is inserted between two roll shells. In this calendering process, the uniformity of the finish is more dependent on the presence or absence of roll shell diameter spots than the roll shell surface temperature distribution. The effect of pressure uniformity is increased.

  4 (a) Front view (b) AA ′ cross-sectional view uses a roll shell provided with a sealed chamber enclosing a gas-liquid two-phase heat medium extending in the longitudinal direction inside the wall thickness near the outer surface, FIG. 1 shows a configuration of a heat treatment roller device employed to reduce this influence. In this figure, 1 is a roll shell, 2 is a rotary drive shaft, 3 is a magnetic induction heating mechanism, and 4 is a gas-liquid two-phase heat. This is a sealed chamber in which a medium is enclosed. The magnetic induction heating mechanism 3 has a plurality of electromagnetic induction heating mechanisms 3a, 3b, 3c, 3d, 3e, 3f,..., And these electromagnetic induction heating mechanisms are arranged along the longitudinal direction of the outer surface of the roll shell 1. ing. Then, the electromagnetic induction heating mechanism 3 is appropriately selected (3c and 3e are selected in the illustrated example) and excited, and the roll shell is partially heated and expanded 1a and 1b to make a diameter difference, thereby adjusting the pressure. .

  However, in the roll shell 1 provided with the hermetic chamber 4 in which the gas-liquid two-phase heat medium extending in the longitudinal direction is enclosed in the wall thickness in the vicinity of the outer surface, heat input from the outer surface by the electromagnetic induction mechanism 3 is also prevented from occurring in the sealed chamber 4. There is a problem that even if the roll shell 1 is partially heated, the degree of change in the diameter of the roll shell 1 is as small as 1a and 1b, making it difficult to obtain the desired difference in diameter. It was.

  The problem to be solved by the present invention is to make the temperature distribution uniform in the longitudinal direction of the outer surface of the roll shell in a sealed chamber in which a gas-liquid two-phase heat medium is sealed, and to effectively roll the roll by heat input from the outer surface. The diameter of the shell can be partially heated and expanded to eliminate such a problem.

The present invention has a hollow roll shell formed with a plurality of sealed chambers that enclose a gas-liquid two-phase heat medium extending in the longitudinal direction inside the wall thickness, and an object to be processed is placed on the outer surface of the rotating roll shell. pressure and, in the heat treatment roller for heat treatment by a heat source provided inside the roll shell, the sealed chamber of the roll shell and forming the inner surface of the roll shell than the wall thickness center, the longitudinal direction of the outer surface of the roll shell A plurality of electromagnetic induction heat generating mechanisms are arranged along the roll shell, and a portion of the roll shell facing the excited electromagnetic induction heat generating mechanism is heated and expanded by selective excitation of the electromagnetic induction heat generating mechanism .

  According to the present invention, the sealed chamber extending in the longitudinal direction of the roll shell enclosing the gas-liquid two-phase heat medium is disposed on the inner surface side of the roll shell in the longitudinal direction, that is, the gas-liquid two-phase heat medium is encapsulated. Is formed as close as possible to the inner surface side of the roll shell near the heat source, so that temperature spots associated with the heat source are prevented and if the part of the roll shell is heated partially, A desired change in diameter due to thermal expansion can be obtained, the influence of the diameter variation of the roll shell in calendering or the like can be easily reduced, and product processing uniformity can be obtained.

The temperature distribution in the longitudinal direction of the outer surface of the roll shell is made uniform in a sealed chamber in which a gas-liquid two-phase heat medium is enclosed, and the diameter of the roll shell is effectively partially heated and expanded by heat input from the outer surface. the purpose to be able to realize the Rukoto forming possible asked to form a sealed chamber enclosing a heating medium of the vapor-liquid two-phase extending in the longitudinal direction of the roll shell near a heat source disposed in the hollow portion of the roll shell did.

  FIG. 1A is a front view showing a configuration of a heat treatment roller according to an embodiment, and FIG. 2B is a cross-sectional view taken along line BB ′. FIG. And CC ′ cross-sectional view. In addition, the same code | symbol is attached | subjected to the part same as the roller apparatus for heat processing shown in FIG. In FIGS. 1 and 2, reference numeral 11 denotes a cylindrical roll shell (roller body). The roll shell 11 has a longitudinally extending sealed chamber 4 that encloses a gas-liquid two-phase heat medium closer to the inner surface 11c side of the roll shell 11 than the center line L of the wall thickness, and is formed on the circumference of the inner surface 11c. A plurality are formed along.

  The heat treatment roller configured as described above is heated by a main heat source provided inside the hollow of the roll shell 11 (not shown), for example, an electromagnetic induction heating mechanism or a heating fluid. The temperature variation caused by the heat source generated in the longitudinal direction of the outer surface 11d of the roll shell 11 due to the heating is eliminated by the movement of the latent heat of the heat medium in the sealed chamber 4, and the temperature distribution of the outer surface 11d of the roll shell 11 is made uniform. can do.

  On the other hand, a plurality of electromagnetic induction heating mechanisms 3a, 3b, 3c, 3d, 3e, 3f,... Are arranged along the longitudinal direction of the outer surface 11d of the roll shell 11 as shown in FIG. When the heat generating mechanism is selectively energized as appropriate and the roll shell 11 is partially heated and expanded to provide a diameter difference, the heat input effect by the selected electromagnetic induction heat generating mechanism is enhanced, and the selected electromagnetic induction heat generating mechanism (see FIG. In the example shown, 3c and 3e are selected), and the diameter of the portion of the roll shell 11 can be increased as indicated by reference numerals 11a and 11b.

  In the above embodiment, the longitudinally closed sealed chambers 4 enclosing the gas-liquid two-phase heat medium are arranged in a line along the circumference of the inner surface 11c of the roll shell 11, but are shown in FIG. In this way, they may be arranged alternately in two rows. In this case, since the gap between the sealed chambers 4 is reduced, the temperature distribution on the outer surface 11d of the roll shell 11 can be made more uniform.

It is the front view (a) which shows the structure of the roller for heat processing which concerns on one Example of this invention, and BB 'sectional drawing (b). They are the front view (a) which shows the structure of the roller apparatus for heat processing using the roller for heat processing shown in FIG. 1, and CC 'sectional drawing (b). It is sectional drawing which shows the other example of the roller for heat processing which concerns on this invention. It is the front view (a) which shows the structure of the roller apparatus for heat processing using the conventional roller for heat processing, and AA 'sectional drawing (b).

Explanation of symbols

2 the rotary drive shaft 3 electroconductive magnetic induction heating mechanism 4 gas-liquid two-phase closed chamber 11 roll shell 11a of the heat medium sealed, 11b thermally expanded portion 11c inner peripheral surface 11d outer peripheral surface

Claims (1)

It has a hollow roll shell formed with a plurality of sealed chambers enclosing a gas-liquid two-phase heat medium extending in the longitudinal direction inside the wall thickness, presses the object to be processed on the outer surface of the rotating roll shell, in the heat treatment roller for heat treatment by a heat source provided in the roll shell, thereby forming the inner surface of the roll shell than the wall thickness around the sealed chamber of the roll shell, a plurality of along the longitudinal direction of the outer surface of the roll shell A heat treatment roller device comprising an electromagnetic induction heat generating mechanism, and a portion of the roll shell facing the excited electromagnetic induction heat generating mechanism is heated and expanded by selective excitation of the electromagnetic induction heat generating mechanism .

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