JPS63238273A - Heat pipe roll - Google Patents

Abstract

PURPOSE:To prevent the break of wound steel plate caused by the thermal deformation of roll by providing plural heat pipes in the axial direction of the inside of the winding roll for steel belt of each kind, and connecting the heat pipes each other with radial projecting parts projecting to the center. CONSTITUTION:In the winding roll 4 for steel strip to be vapor deposited used in a vapor deposition part of continuous vacuum deposition device, plural heat pipes 18 are provided in the axial direction of the inside of the roll, and each heat pipes 18 is provided with the projecting part 21 in a suitable part of radial direction of the roll, and each heat pipes 18 connected each other at the connecting part 22 of the radial projecting part 21. Owing to the existence of these heat pipes 18, heat moves from the high temp. part wherein the steel strip is not brought into contact with to the lower temp. part of the center of the roll which the steel strip is brought in contact with, and the roll temp. in the vicinity of each heat pipe is uniformized in the axial direction. Consequently, the roll 4 is prevented from being bent by deformation due to the partial temp. difference, which prevents the wound steel strip from being broken.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heat pipe roll, such as a winding roll applied to a vapor deposition section of a continuous vacuum evaporation device, a seal roll of a vacuum sealing device, or a continuous heat pipe roll. The present invention relates to a heat pipe roll that can be applied to hearth rolls, etc. of type annealing equipment.

[Conventional technology]

Continuous vacuum evaporation equipment is used as a means of continuously plating metals such as zinc onto substrates such as copper strips.
A schematic configuration of a conventional continuous vacuum evaporation apparatus to which a conventional winding roll is applied will be explained with reference to Fig. s2.

In the figure, 1 is a copper strip (evaporation substrate), 2 is a vacuum sealing device consisting of a plurality of sealing chambers, 3 is a vapor deposition chamber, 4 is a winding roll that guides the copper strip 1 through it, and 5 is a winding roll. This is a heater that heats 4. Reference numeral 7 designates a bathtub in which molten metal (such as zinc) 6 exists, and vapor 6af of the metal 6 is generated under vacuum conditions and guided to the steel strip 1 through a duct (channel) 8 as shown by arrow 2. Metal vapor necessary to deposit on steel strip 1!
(Amount of evaporation) is determined by the electric power of nine heaters 9 installed in the bathtub 7,
The shutter 10 is installed at the outlet of the bathtub 7 and can be controlled by opening and closing the shutter 10 with an opening/closing device 11 such as a cylinder to change the area of the opening 120.

The molten metal 6 in the bath 7 is melted into the melting furnace 1 at the bottom of the vapor deposition chamber 3.
3 through the snorkel 14 due to the pressure difference.

The deposition chamber 3 is connected to a vacuum bong 17 via a pipe 15 and a valve 16.
The pressure is normally maintained at a pressure lower than the saturated vapor pressure of the molten metal 6 with an inert gas such as nitrogen (N2).

In the above configuration, during operation, the manufacturing instructions (steel type,
The pressure in the deposition chamber 3 is set in accordance with the deposition rate (deposition amount per unit area, unit time) set based on the sheet width, sheet thickness, sheet passing speed, target deposition amount, etc. The power of the heater 9 and the shutter 10 are adjusted according to the required amount of evaporation of metal.
By adjusting the opening of the steel strip 1, the amount of vapor deposition on the surface of the steel strip 1, that is, the thickness of the vapor deposited film is controlled to a target value.

[Problem that the invention seeks to solve]

By the way, in the above-mentioned conventional winding roll 4, a heater 5 is provided inside the roll to heat the roll to about SO+, +C so that zinc vapor is not deposited on the roll surface.

FIG. 3 is a cross-sectional view of the winding roll 4. The copper strip 10 has a width of various dimensions, while a heater 5 is placed inside the roll 4 and extends over the entire length of the roll. The 9th roll that handles steel strips is narrow, and the 4th roll is about 50.
00C, whereas the temperature of the steel strip 1 is 200 to 250C, which is the appropriate temperature before plating.

Therefore, as shown in FIG. 3, the temperature of the part A in the center of the surface of the roll 4 that contacts the steel strip mold is low;
The temperature of the portion B of the steel strip 211 that does not come into contact with the steel strip 1 becomes high.

Moreover, it is a steel belt! Since there is a temperature difference due to the uneven contact pressure even in the part A that is in contact with the steel strip 1, thermal deformation occurs in the entire roll 4, causing roll bending and vibration, which may cause breakage of the steel strip 1 or damage to the plating surface. It was causing injuries.

The present invention provides a heat wrap roll that is free from such drawbacks and can be used as a winding roll.

[Means for solving problems]

According to the present invention, a plurality of heat pipes are provided in the roll axial direction within the roll shell, and each heat pipe has appropriate locations that protrude toward the center in the roll radial direction and are connected to each other. The present invention relates to the characteristic heatbail 10-1.

[Effect]

In the present invention, heat pipes provided in the axial direction of the roll inside the shell transport heat from the high temperature part at the keel end to the low temperature part in the center of the roll, thereby making the roll temperature near each heat pipe uniform in the axial direction.

However, non-condensable gas generally exists inside the heat pipe, and when the heat pipe 1 is in operation, the non-condensable gas collects in the condensing part of the heat pipe, so the part where the non-condensable gas collects, that is, in this example, the roll The central low-temperature section may be several tens to hundreds of degrees lower than the operating temperature of the entire heat pipe.

Therefore, in the present invention, for example, a protrusion is provided in the center of the heat pipe, which extends toward the center in the radial direction of the roll, in order to make the temperature uniform. That is, the roll axle load is generally water-cooled to support bearings, but if the structure is such that this water cooling is applied not only to the shaft ends but to the entire center axis of the roll, the temperature near the center axis at the end of the roll will be lower than near the surface of the roll. Therefore, the area near the tip of the protrusion of the heat pipe is the lowest temperature in the entire heat pipe, so non-condensable gas gathers in this area.
There is no non-condensable gas in the straight part of the heat pipe near the surface of the Koichi layer, and the temperature in the straight part of the heat pipe becomes uniform.

Further, in the present invention, the protrusions toward the center are connected, and the working fluid in each heat pipe is exchanged with each other, so that the temperature of the working fluid in each heat pipe becomes uniform, and the temperature in the local direction of the roll is reduced. It also has a uniformizing effect.

〔Example〕

Figure 1 (A) and Figure 1 (B), which is a sectional view taken along the line A-A.
1 is a diagram showing an example of a case where the heat pipe roll of the present invention is applied to one winding opening.

In the figure, 4 is a roll shell, 18 is a heat pipe,
21 is a protrusion provided at the center of the heat pipe and faces the center in the radial direction of the roll; 22 is a connecting portion of the protrusion; 2
The straight part 5 of the three-butter heat bike 18 is a heater that heats the roll shell 4.

Each heat pipe 1B has a protrusion 21 and a connecting portion 22.
Since no non-condensable gas is accumulated other than that, the straight portions 2 and 3 of each heat pipe 18 operate at the same temperature. The temperature of the entire surface of this ninth roll 4 becomes uniform.

〔Effect of the invention〕

According to the present invention, since the straight portions of the heat pipes in the roll shell operate at the same temperature, the entire roll surface has a nearly uniform temperature, preventing thermal deformation of the roll, and preventing breakage of the copper strip and scratches on the plating surface. Prevented.

Brief explanation of the four factors Figure 1 (Al, (Bl is a structural diagram of a winding roll as an embodiment of the heat binder 10- of the present invention, Figure 1 + 8> is Figure 1 + A) A- A sectional view taken along line A, FIG. 2 is an explanatory diagram of a continuous vacuum evaporation apparatus for explaining an application example of a conventional wrapping roll, and FIG. 3 is a structural diagram of a conventional wrapping roll.

Figure 1

Claims (1)

[Claims] A heat pipe roll characterized in that a plurality of heat pipes are provided in the roll axial direction within the roll shell, each heat pipe protruding toward the center in the roll radial direction at appropriate locations, and having connected locations.