KR20080030258A - A sheet casting apparatus - Google Patents

Abstract

A sheet forming apparatus is provided to improve productivity by reducing the number of finely adjusting an interval between an upper surface of a belt unit and a lower end of a blade. A sheet forming apparatus(100) includes a belt unit(110), a slurry supply unit, a thickness regulating unit(130), a support unit(140), and an interlock unit. The belt unit is wound between a pair of rotating bodies to rotate in one direction. The slurry supply unit supplies slurry to an upper surface of the belt unit. A lower end of the thickness regulating unit is arranged from an outlet side of the slurry supply toward a widthwise direction of the belt unit so as to regulate thickness of a sheet coated on the belt unit. The support unit is in contact with a lower surface of the belt unit which is directly under the thickness regulating unit. The interlock unit displaces the thickness regulating unit up and down according to thickness displacement of the belt unit and eccentricity of the support unit.

Description

Sheet Forming Apparatus {a Sheet Casting Apparatus}

1 is a block diagram showing a conventional sheet forming apparatus.

Figure 2 (a) (b) is a schematic diagram showing the thickness change of the sheet produced in the conventional sheet forming apparatus.

Figure 3 (a) (b) is an overall configuration showing a sheet forming apparatus according to the present invention.

Figure 4 is an exploded perspective view showing a sheet forming apparatus according to the present invention.

5 is a side view showing a sheet forming apparatus according to the present invention.

6 is a detailed view of a contact roll employed in the sheet forming apparatus according to the present invention.

Figure 7 (a) (b) is a schematic diagram showing the thickness change of the sheet produced in the sheet molding apparatus of the present invention.

8 is an external view of a sample sheet manufactured in the present invention and the conventional apparatus, respectively.

Figure 9 is a graph measuring the thickness on the left side of the sample sheet produced in the present invention and the conventional apparatus, respectively.

10 is a graph measuring the thickness in the middle of the sample sheet prepared in the present invention and the conventional apparatus, respectively.

Figure 11 is a graph measuring the thickness on the right side of the sample sheet prepared in the present invention and the conventional apparatus, respectively.

Explanation of symbols on the main parts of the drawings

110: belt portion 120: slurry supply portion

130: thickness regulation 131: blade

132: holder 140: support

150: linkage 151: fixed base

152: guide shaft 153: moving block

154: contact roll 155: slider

156: guide groove 157: cover member

The present invention relates to an apparatus for forming a sheet, and more particularly, to prepare a sheet having a uniform thickness by maintaining a constant gap between the upper surface of the metal belt and the lower end of the blade, and to obtain a stable thickness distribution. A sheet forming apparatus is provided.

In general, a process of manufacturing a multilayer ceramic capacitor (Multi-Layer Ceramic Condnser) is prepared by adding an organic binder to the raw material powder, such as BaTiO ₃ , CaOa ₃ , MnO, Glass Frit to prepare a slurry, the slurry is a dielectric sheet green sheet Is formed into a thin film, and a patterned metal internal electrode of Ni, Cu, Pd, Pd / Ag material is printed on the surface of the green sheet to prepare a ceramic sheet in which the electrode is formed, and the ceramic sheet on which the internal electrode is printed is multilayered. The laminated sheet is manufactured by laminating, and the laminated sheet is pressed at a pressure of 500 to 1300 kgf / cm ² , and the compressed laminated sheet is cut to a predetermined length to produce a rectangular parallelepiped ceramic gas, and then the ceramic gas is fired in a sintering furnace. The binder component was burned out at 20 to 40 hours at a temperature of 230 to 350 ° C. to remove the binder component, and calcined at 900 to 950 ° C. to 1100 to 1300 ° C. for 10 to 24 hours. Then, the external electrode is applied to the outer surface of the ceramic gas fired in the firing furnace, and then fired through a temperature and cooling step of 750 to 950 ° C., and the external electrode is applied to the outer surface of the fired ceramic gas, and Baking at a temperature of 750 to 950 ℃ for 30 minutes to 2 hours to form a terminal electrode, and then plated to complete the product.

In addition, casting of the green sheet into a thin film is performed by applying a thin slurry having a viscosity of 500 cps in a liquid state onto a metal belt or film with a constant thickness of several μm to several tens of μm, and drying it to a high temperature in a sheet state. To make.

Conventionally, the sheet forming apparatus 1 is made of a thin metal plate made of SUS metal, as shown in FIG. 1, and a metal belt 10 wound between a wire and a rear pulley 11 and 12, and a slurry is filled in the metal. The dam 20 disposed above the belt 10, the blade 30 and the blade 30 disposed at the outlet side of the dam 20 and vertically moved with respect to the upper surface of the metal belt 10. It is configured to include a support roll 35 that is external to the lower surface of the metal belt 10 directly below.

Accordingly, when the metal belt 10 is circularly rotated at a constant speed in one direction (clockwise in the drawing), the slurry discharged through the exit side of the dam 20 together with the metal belt 10 and the blade 30. The slurry is applied continuously to the upper surface of the metal belt 10 while passing through, and the applied slurry is formed with a thickness of a gap between the lower end of the blade 30 and the upper surface of the metal belt 10 as a drying furnace 2. The sheet (S) is manufactured while drying at a high temperature while passing through.

Here, the thickness control of the sheet (S) by controlling the thickness of the sheet (S) by varying the gap between them by raising or lowering the blade 30 relative to the upper surface of the metal belt (10).

On the other hand, one of the important factors to determine the quality level of the laminated ceramic capacitor is the thickness accuracy of the sheet in the sheet forming process, because the thickness distribution for the sheet thickness is proportional to the capacity failure of the capacitor.

Factors affecting the thickness precision of the sheet in the process of manufacturing the sheet using the blade is known displacement amount according to the thickness displacement amount of the metal belt 10 and the precision of the support roll 35, the metal belt ( The thickness displacement of 10) corresponds to the thickness deviation generated in the process of processing the SUS metal plate to a thickness of several hundred μm.

The amount of eccentric displacement of the support roll 35 is generated in the process of assembling the processing tolerance generated in the process of processing the cylindrical roll and the roll shaft 35a of the support roll 35 to the bearing block 36a of the support 36. Due to the assembly tolerances that are caused by the self-center and the rotation center of the support roll does not coincide with each other and eccentric.

In this case, as shown in Fig. 2 (a), in the process of forming the sheet, the thickness of the metal belt 10 is the minimum, the eccentric displacement of the support roll 35 at the point where the blade ( The thickness t of the sheet S corresponding to between the lower end of 30 and the upper surface of the metal sheet 10 becomes a maximum value, but as shown in FIG. At the point where the belt 10 has its own thickness and the eccentric displacement of the support roll 35 is the maximum, the sheet S corresponding to between the lower end of the blade 30 and the upper surface of the metal sheet 10 is formed. The thickness t becomes a minimum value.

Accordingly, the thickness of the sheet S manufactured in the conventional apparatus is uneven due to the thickness variation of the metal belt and the eccentricity of the support roll, and the thickness spreading becomes large, which causes a capacity failure of the condenser. It lowers the reliability.

Therefore, the present invention has been made to solve the above problems, the object is to maintain a constant gap between the upper surface of the metal belt and the lower end of the blade to produce a sheet having a uniform thickness, stable thickness An object of the present invention is to provide a sheet forming apparatus capable of obtaining scatter.

As a technical means for achieving the above object, the present invention is a belt unit which is wound between a pair of rotating body to rotate in one direction; Slurry supply unit for supplying a slurry to the upper surface of the belt portion; A thickness restricting portion arranged at a lower end in the width direction of the belt portion at an exit side of the slurry supply portion to regulate a thickness of a sheet applied to the belt portion; A support part which is external to the lower surface of the belt part corresponding to the lower part of the thickness control part, and an interlocking part which vertically displaces the thickness control part according to the thickness displacement amount of the belt part and the eccentricity of the support part; It provides a sheet molding apparatus comprising a.

 Preferably, the linkage portion is a pair of fixed base provided on the left and right sides of the belt portion, a pair of movable blocks and the thickness is assembled so as to slide up and down on the vertical guide shaft of the fixed base, the both ends of the thickness restriction portion is fixed respectively; And a contact roll provided on the restricting portion and externally contacting the upper surface of the belt portion.

More preferably, the contact roll is rotatably assembled at the lower end of the slider having a predetermined length, and the slider is assembled to the front surface of the holder to cover the guide groove and the guide groove recessed in the front of the thickness control portion It is disposed so as to be movable between the cover members.

More preferably, the rotation center of the contact roll is disposed on the same vertical axis as the rotation center of the support.

More preferably, the thickness limiting portion is provided with a handle for adjusting the distance between the contact roll and the belt portion by moving the slider to move the slider during the rotation operation by screwing the lower end to the upper end of the slider.

More preferably, the thickness control unit is provided with a gauge for measuring the moving amount of the slider by contacting the lower end of the probe to the upper surface of the sensing bar extending from the slider.

More preferably, the sensing bar is mounted on one side of the slider is exposed to the outside through the long hole formed in the guide groove.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

3 is an overall configuration diagram showing a sheet forming apparatus according to the present invention, Figure 4 is an exploded perspective view showing a sheet forming apparatus according to the present invention, Figure 5 is a side view showing a sheet forming apparatus according to the present invention. .

3 to 5, the sheet forming apparatus 100 of the present invention, the belt portion 110, the slurry supply portion 120, the thickness control portion 130, the support portion 140 and the interlocking portion 150 It is configured to include.

The belt unit 110 is a belt member which is wound around a pair of rotating bodies (not shown) disposed at a predetermined distance and circulated at a constant speed in one direction by a driving force transmitted to any one of the pair of rotating bodies.

The belt unit 110 is processed into a metal thin plate having a thickness of several hundred μm using a metal such as SUS, and the pair of rotating bodies are connected to a driving source, and the driven pulley on the drum is idling with the drum. It is provided with.

The slurry supply unit 120 is a receiving member which is provided on the upper surface of the belt unit 110 is filled with a certain amount of the slurry having fluidity, and is a fixed member fixed to the belt portion 110 that rotates in one direction.

The slurry supply unit 120 opens the one side end in contact with the front surface of the thickness control unit 130, and by opening the lower surface corresponding to the belt unit 110, the upper portion of the belt portion 110 which rotates in one direction The slurry is continuously fed to the cotton.

The thickness control part 130 has a lower end disposed in the width direction of the belt part 110 at the exit side of the slurry supply part 130 and regulates the thickness of the sheet applied to the upper surface of the belt part 110. And adjustable so as to be movable in a direction orthogonal to the upper surface of the belt unit 110 to be adjusted.

The thickness control part 130 includes a blade 131 having a lower end disposed in the width direction of the belt part, and a holder 132 having the blade 131 on the front surface corresponding to the slurry supply part.

The blade 131 is assembled to be replaced by a plurality of fastening members on one side of the holder 132, the length of the blade 131 is provided longer than the width of the sheet (S), the holder ( The length of the 132 is provided longer than the blade 131.

The support unit 140 rotates externally with the lower surface of the belt unit 110 corresponding to the lower portion of the thickness control unit 130 to guide the one-way progress of the belt unit 110.

The support unit 140 is provided as a roll member in which the left and right ends of the roll shaft are rotatably assembled in the bearing block provided in the fixed base (not shown), and is provided with a length greater than the width of the belt unit 110.

The interlocking portion 150 is generated in a process in which the thickness displacement generated in the process of processing the belt portion 110 into a thin metal plate and the support portion 140 rotated while supporting the belt portion 110 are assembled with a bearing block. According to the amount of eccentricity generated in the assembly tolerance is to be the up and down displacement of the thickness control portion 130.

The interlocking portion 150 is assembled to a pair of fixed base 151 provided on the left and right sides of the belt portion 110 and the guide shaft 152 of the fixed base 151 so as to slide up and down and regulate the thickness. Both ends of the unit 130 are provided with a pair of moving blocks 153 and the thickness control unit 130 is fixed to each other is provided with a contact roll 154 that is external to the upper surface of the belt unit 110.

Here, the fixing base 151 is a fixed structure fixed to each of the left and right sides of the belt portion 110, the moving block 153 is a guide shaft 152 provided perpendicular to the fixed base 151 It is a rectangular parallelepiped bushing member that is assembled to move up and down, the contact roll 154 is a roll member exposed to the lower end of the thickness control portion 130 is idle.

The center of rotation of the contact roll 154 is preferably disposed on the same vertical axis as the center of rotation of the support 140.

Both left and right ends of the holder 132 constituting the thickness control unit 130 is assembled to disassemble a separate connection member on one side of the moving block 153, but is not limited thereto and integrally by welding. May be connected.

As shown in FIG. 6, the contact roll 154 is rotatably assembled at a lower end of the slider 155 having a predetermined length, and the slider 155 is a holder constituting the thickness control part 130. The guide groove 156 recessed in the front surface of the 132 and the cover member 157 assembled as a plurality of fastening members on the front surface of the holder 132 to cover the guide groove 156 to be movable Is placed.

Here, the lower end of the slider 155 is formed through the assembly hole 155b through which the roll shaft 154a of the contact roll 154 is inserted, and an end portion of the roll shaft 154a exposed through the assembly hole 155b is formed. The spring washer 154b and the nut member 154c are assembled to be difficult to separate from the outside.

In addition, the thickness control unit 130 has a lower end connected to the upper end of the slider 155 to move the slider 155 to move during the rotation operation, the gap between the contact roll 154 and the belt unit 110 It is provided with a handle 161 to adjust.

Accordingly, the upper surface of the slider 155 is provided with a female thread hole (not shown) of a predetermined depth, the handle 161 is clocked by screwing the male screw formed on the lower end of the handle 161 to the female thread hole. The slider 155 is moved in proportion to the amount of rotation of the handle 161 in the guide groove 156 when rotated in the direction or counterclockwise direction.

The handle 161 is rotatably provided at the first bracket 162 assembled at the upper end of the holder 132 constituting the thickness control part 130.

And, as shown in Figure 4, the thickness control unit 130, the lower end of the probe 163a is in contact with the upper surface of the sensing bar 165 extending from the slider 155, the slider 155 It is provided with a gauge 163 for measuring the amount of shanghai.

The detection bar 165 is mounted on one side of the slider 155 and exposed to the outside through the long hole 156a formed in the guide groove 156, and the probe 163a is removed from the gauge 163. It extends to always contact the upper surface of the sensing bar 165, the gauge 163 is provided on the second bracket 164 is assembled to the back of the holder 132 constituting the thickness control portion 130. .

When the sheet is manufactured using the sheet molding apparatus having the above-described configuration, the slurry supplied to the upper surface of the belt part 110 constitutes the upper surface of the belt part 110 and the thickness control part 130. While passing through the gap between the lower end of the blade 131 is applied to the sheet (S) having a predetermined thickness on the upper surface of the belt portion 110.

The blade 131 and the thickness control portion 130 is adapted to the upper and lower displacements due to the thickness displacement of the belt portion 110 and the eccentricity of the support portion 140 while externally contacting the upper surface of the belt portion 110. In addition, by having a contact roll 154 interlocked with each other, the gap between the upper surface of the belt unit 110 and the lower end of the blade 131 can always be kept constant.

That is, as shown in Fig. 7 (a), in the process of forming the sheet (S), the support portion due to the eccentricity due to the self-thickness of the belt portion 110 that the contact roll 154 is in contact with the assembly tolerance is reduced When the 140 is lowered, the contact roll 154 and the blade 131 are lowered accordingly to maintain a constant distance between the lower end of the blade 131 and the upper surface of the belt unit 110.

On the contrary, as shown in 7 (b), in the process of forming the sheet (S), the support portion 140 due to the eccentricity caused by the self-thickness of the belt portion 110 that the contact roll 154 is in contact with or due to assembly tolerances. When the) is raised, the contact roll 154 and the blade 131 are also raised accordingly to maintain a constant distance between the lower end of the blade 131 and the upper surface of the belt unit 110 as described above.

This is because the holder 132 on which the blade 131 is mounted is moved together with the moving block assembled to the guide shaft 162 of the support, and contacts the lower end of the slider 155 assembled to the holder 132. This is because the roll 154 is provided so that the contact roll 154 and the holder 132 interlock with the blade 131 according to the thickness displacement of the belt 110 and the eccentricity of the support 140.

<Example>

Slurry prepared under the same conditions using the conventional molding apparatus 1, the blade 30 is fixed to the position and the sheet (S) using the molding apparatus 100 of the present invention in which the thickness control part 130 is interlocked. Prepared.

Samples for measurement were taken by cutting 150 mm per 1 m of continuously produced sheet S, and the sheet thickness of the collected samples was measured using a micrometer.

In addition, the measurement sample was overlapped eight times in order to reduce the measurement error as shown in Figure 8, and then measured three positions, respectively, left, middle, and right, at this time, of the sheet manufactured in the conventional device (1) The target thickness was 222 µm, and the target thickness of the sheet produced in the apparatus of the present invention was set to 217 µm.

Figure 9 is a graph measuring the thickness on the left side of the sample sheet prepared in the present invention and the conventional apparatus, respectively, Figure 10 is a graph measuring the thickness in the middle of the sample sheet produced in the present invention and the conventional apparatus, respectively 11 is a graph measuring the thickness at the right side of the sample sheet produced in the present invention and the conventional apparatus, respectively.

As shown in Figs. 9 to 11, the thickness change of the sheet manufactured in the apparatus of the present invention is constant and the thickness distribution is stable regardless of the measurement position, while the thickness of the sheet manufactured in the conventional apparatus is not constant and irregular. The thickness distribution is also unstable.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to clarify that knowledge is easy to know.

According to the present invention as described above, a thickness regulation portion for regulating the thickness of the sheet applied to the belt portion on the exit side of the slurry supply portion for supplying the slurry to the upper surface of the belt portion rotated rotationally, the thickness displacement generated during the processing of the belt portion And an interlocking portion for vertically displacing the thickness restricting portion according to the eccentricity of the support portion which is external to the belt portion and the outer side of the belt portion, so that the distance between the upper surface of the belt portion and the lower end of the blade can be kept constant so that thickness distribution is stable. It is possible to produce a sheet having a uniform thickness.

In addition, by improving the number of times of fine adjustment, adjustment and adjustment of the distance between the upper surface of the belt portion and the lower end of the blade, it is possible to reduce the amount of waste by improving the work productivity and lowering the error rate generated during fine adjustment, while using the belt portion The effect of extending the life is obtained.

Claims (7)

A belt portion wound between a pair of rotary bodies and rotated in one direction; Slurry supply unit for supplying a slurry to the upper surface of the belt portion; A thickness restricting portion arranged at a lower end in the width direction of the belt portion at an exit side of the slurry supply portion to regulate a thickness of a sheet applied to the belt portion; A support part which is external to the lower surface of the belt part corresponding to the lower part of the thickness control part; An interlocking portion configured to vertically displace the thickness regulating part according to the thickness displacement amount of the belt part and the eccentricity of the support part; Sheet molding apparatus comprising a. The method of claim 1, The linkage portion is provided with a pair of fixed bases provided on the left and right sides of the belt portion, a pair of movable blocks on the vertical guide shafts of the fixed base, and a pair of movable blocks on which both ends of the thickness restricting portion are fixed, respectively. Sheet forming apparatus characterized in that it comprises a contact roll which is provided with the upper surface of the belt portion. The method of claim 2, The contact roll is rotatably assembled at a lower end of the slider having a predetermined length, and the slider is formed between a guide groove recessed in the front of the thickness restricting portion and a cover member assembled at the front of the holder to cover the guide groove. Sheet forming apparatus, characterized in that arranged in Shanghai. The method of claim 2, The center of rotation of the contact roll is sheet forming apparatus, characterized in that disposed on the same vertical axis as the center of rotation of the support. The method of claim 2, The thickness regulating portion is a sheet forming apparatus, characterized in that the lower end is screwed to the upper end of the slider and the handle for adjusting the distance between the contact roll and the belt portion by moving the slider to move during the rotation operation. The method of claim 2, The thickness control unit is a sheet forming apparatus characterized in that it comprises a gauge for measuring the moving amount of the slider by the probe of the lower end in contact with the upper surface of the sensing bar extending from the slider. The method of claim 6, The sensing bar is mounted on one side of the slider sheet forming apparatus, characterized in that exposed to the outside through the long hole formed in the guide groove.

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