JPS63179063A - Winding roll - Google Patents

Abstract

PURPOSE:To provide a winding roll which is operated at approximately the same temp. over the entire part of the roll and can prevent the thermal deformation of the roll by embedding plural pieces of heat pipe into a shell along the roll axis direction thereof and embedding annular blocks consisting of a material having large heat conductivity into the inside ends of the shell. CONSTITUTION:Plural pieces of the heat pipes 18 are embedded into the roll shell 4 along the roll axis direction thereof and the annular blocks 20 consisting of the material such as Cu or Al having the large heat conductivity are embedded into the roll ends. The shell 4 is heated by a heater 5. Since the pipes 18 are thermally connected via the annular blocks 20 at the roll ends (i.e., near the heat medium evaporating part of the pipes 18), the temp. near the heat medium evaporating part of all the pipes 18 are approximately uniformized even if thermal loads very in the roll axis direction. All the pipes 18, therefore, operate at about the same temp. The temp. over the entire surface of the roll is thus uniformized, by which the thermal deformation of the roll is prevented, and the rupture at a steel strip and the flawing of the plated surfaces thereof are prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a winding roll that is applied to the deposition section of a continuous vacuum evaporation device, and also to a seal roll of a vacuum sealing device, a hearth roll of a continuous annealing equipment, etc. Regarding the roll structure that can also be applied.

[Conventional technology]

Continuous vacuum evaporation equipment is used as a means of continuously plating metals such as zinc on substrates such as copper strips.
The schematic structure of a conventional continuous vacuum evaporation apparatus to which a conventional winding roll is applied will be explained with reference to FIG.

In the figure, 1 is a copper strip (evaporation substrate), 2 is a vacuum V-ru device consisting of a plurality of sealing chambers, 5 is a vapor deposition chamber, 4 is a winding roll that guides the steel strip 1 through it, and 5 is a winding roll. This is a heater that heats the attachment row Iv4.

7 is a bathtub, inside of which molten metal (zinc, etc.) 6 exists,
The vapor 6a of the metal 6 is generated under vacuum conditions and guided to the steel strip 1 through a duct (chuck A/) 8 as shown by arrow 2. Metal vapor required to deposit on steel strip 1! k (amount of evaporation) can be calculated by changing the electric power installed in the bathtub 7 and the area of the opening 12 by opening and closing the shutter 10 installed at the outlet of the bathtub 7 with an opening/closing device 11 such as a cylinder. It is configured so that it can be controlled in many ways.

The molten metal 6 in the bath 7 is sucked and supplied from the melting furnace 15 at the bottom of the deposition chamber 3 via a system snorkel 14 due to a pressure difference.

The vapor deposition chamber 5 is connected to a vacuum pump 17 via a pipe 15 and a valve 16.
It 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,
Deposition rate (deposition amount per unit area, unit time) K set based on sheet width, sheet thickness, sheet threading speed, target deposition amount, etc.
The pressure of the vapor deposition chamber 3 is set correspondingly, and the power of the heater 9 and the shutter 10 are adjusted correspondingly to the required evaporation amount of the vapor-deposited metal.
By adjusting the opening degree of the copper strip 1, the amount of vapor deposition on the surface of the copper 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 installed inside the roll to heat the roll to about 500°C so that zinc vapor is not deposited on the roll surface.

FIG. 5 is a diagram showing a cross section of the winding roll 4, in which the heater 5 disposed inside the low fi-/4 extends over the entire length of the roll, while the width of the copper strip 10 is In order to handle the strip, the temperature of the roll 4 is about 500°C, whereas the temperature of the steel strip 1 is 200 to 250°C, which is the appropriate temperature before plating.

Therefore, as shown in FIG. 3, part A of the surface of the roll 4, which is in contact with the steel strip 1 at the center, has a low temperature.
The temperature of the portion B that does not contact the steel strip 1 at the end becomes high.

Moreover, since there is a temperature difference due to the uneven contact pressure even in part A that is in contact with the steel strip 1, thermal deformation occurs on the surface of the roll 4, causing roll bending and vibration, which causes the steel strip 1 to break. Otherwise, it caused damage to the mating surface.

The present invention provides a winding roll that does not have these drawbacks.

[Means for solving problems]

The present invention has a plurality of heat pipes embedded inside the shell along the axial direction of the roll, and an annular ring made of a material with high thermal conductivity such as copper or aluminum near the inside end of the shell, that is, the end of the heat pipe. This relates to a winding roll in which blocks are embedded.

[Effect]

In the present invention, a tobide provided in the axial direction of the roll inside the shell transports heat from the high temperature part at the end of the roll to the low temperature part in the center of the roll, thereby making the low A/temperature near each heat pipe uniform in the axial direction. do.

If heat loads differ in the circumferential direction of the roll, there is a risk that each heat pipe may operate at different operating temperatures due to the action of the heat pipes alone. Blocks with high thermal conductivity such as copper and aluminum buried near the medium evaporation section keep the low lv@ section at almost the same temperature all around, so the temperature near the heat medium evaporation section of all heat pipes is almost the same. becomes the temperature. As a result, all heat pipes operate at approximately the same temperature, resulting in uniform temperature across the roll.

〔Example〕

FIG. 1 (9), which is a cross-sectional view taken along the line A--A of FIG. 1, shows an embodiment of the winding roll according to the present invention.

In the figure, 4 is a roll shell, 18 is a heat pipe,
20 is an annular block made of a material with high thermal conductivity such as copper or aluminum embedded in the end of the roll; 5 is a heater that heats the shell 4;

Each heat pipe 18 is thermally connected via an annular block 20 at the end of the roll (that is, near the heat medium evaporating part of the heat pipe 18), and the heat load differs in the circumferential direction of the roll. Also, the temperature near the heat medium evaporation part of all heat pipes 18 is almost the same as #1, and all heat pipes 18
The rolls operate at almost the same temperature, so the temperature over the entire surface of the roll is uniform.

〔Effect of the invention〕

According to the present invention, all the heat pipes inside the roll shell are thermally connected and operate at almost the same temperature, so the entire roll has a nearly uniform temperature, preventing thermal deformation of the roll, and preventing the copper strip from deforming. This prevents breakage and scratches on the plated surface.

[Brief explanation of the drawing]

Fig. 1 (9) is a structural diagram of a winding roll as an embodiment of the present invention, and Fig. 1 (b) is a sectional view taken along line A-A of Fig. 1;
FIG. 2 is an explanatory diagram of a continuous vacuum evaporation apparatus for explaining an application example of a conventional winding roll, and FIG. 3 is a structural diagram of a conventional winding roll.

Claims (1)

[Claims] A winding roll in which multiple heat pipes are embedded in the axial direction of the roll inside the shell, and annular blocks made of a material with high thermal conductivity are embedded in both ends of the shell.