JP2013043322A - Method and apparatus for cleaning screen printing table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for cleaning a screen printing table which easily and securely clean the top of the screen printing table, and prevent a rise of the cost of a product.SOLUTION: There are provided the method and the apparatus 10 for cleaning the top of the screen printing table 11 after placing a ceramic green sheet with through-holes on the screen printing table and then taking out the ceramic green sheet having conductor paste applied to through-hole wall surfaces or charged in the through-holes. The method include: a step in which a solvent-impregnated part of a roll wiper 13 formed of nonwoven fabric and having a width larger than a width of the ceramic green sheet is abutted on the top of the screen printing table 11, the table is reciprocated and the top of the screen printing table is cleaned while being wetted with a solvent; and a step in which a solvent-unimpregnated part of the roll wiper 13 is abutted on the top of the screen printing table 1, the table is reciprocated and finish cleaning is performed while wiping off the solvent stuck to the table.

Description

  The present invention relates to a screen printing table for removing the surface of a screen printing table provided in a screen printing machine, a conductive paste adhering to the vicinity of a suction through hole of the screen printing table, and ceramic waste generated from a ceramic green sheet. The present invention relates to a cleaning method and a screen printing table cleaning device.

In recent years, ceramic packages for mounting and housing electronic component elements such as semiconductor elements, crystal resonators, and piezoelectric elements have become smaller and more reliable for electronic devices such as mobile phones and personal computers. In response to demands for downsizing, there is an urgent need to cope with downsizing and high reliability. Conventionally, a plurality of sheet-like ceramic green sheets using ceramics such as alumina (Al ₂ O ₃ ) and aluminum nitride (AlN) have been used for forming a ceramic package to cope with these. These ceramic green sheets are provided with through holes for vias and through holes for forming an electrically conductive state between the upper and lower surfaces of the sheet, and tungsten (W) and molybdenum are provided in these holes. After filling a via hole or applying to a wall surface of a hole for a through hole using a conductor paste made of a high melting point metal such as (Mo), a predetermined conductor print pattern is formed on the surface. Yes. The plurality of ceramic green sheets on which these are formed are overlapped and joined to each other by applying temperature and pressure to form a laminated body. Since this ceramic green sheet laminate is usually composed of an assembly in which a plurality of ceramic packages before firing the individual pieces are arranged in the sheet, a slit blade for pressing groove is pressed against the surface of the laminate. Thus, a pressing groove is formed so as to partition the outer shape of the individual piece. After this, the laminate is fired in a reducing atmosphere to form a fired body, a plating film is formed on the conductor part, or a seal ring is brazed on the conductor part as necessary, and then the pressing groove is used. Divided into individual ceramic packages.

  Conventionally, a screen printing machine has been used for filling the via hole with the conductive paste, applying the conductive paste to the wall surface of the through hole, and forming a predetermined print pattern on the surface. . In this screen printing machine, each ceramic green sheet is placed on a screen printing table, and the conductive paste is filled into the via holes of each ceramic green sheet using a screen plate, a squeegee, and a conductive paste, or through-through is performed. The conductor paste is applied to the wall surface of the hole hole, and a predetermined pattern is formed on the surface by screen printing. Of these printing methods, the conductor paste is filled into the via hole by placing the ceramic green sheet on the screen printing table and scraping the conductor paste on the screen plate with a squeegee to the conductor paste in the via hole of the ceramic green sheet. It is filled by press-fitting. In addition, among these printings, the application of the conductive paste to the wall surface of the through hole hole is performed by screen printing in which a through hole for sucking the conductive paste is provided in accordance with the position of the through hole hole of the ceramic green sheet. Place the ceramic green sheet on the table and suck the conductor paste on the screen plate through the through hole while scraping the conductor paste with the squeegee, so that the center of the hole for the through hole of the ceramic green sheet is hollowed out only on the wall surface Conductive paste is applied. In filling and applying such conductive paste, the conductive paste goes directly to the screen printing table side through the through hole provided in the ceramic green sheet, and the upper surface of the screen printing table and the through hole for sucking the conductive paste are provided. In some cases, the peripheral portion may be stained with the conductive paste, and the conductive paste adheres to the ceramic green sheet placed on the dirty screen printing table, resulting in a decrease in yield. Therefore, it is necessary to clean the upper surface of the screen printing table soiled with the conventional conductive paste by wiping with a cloth soaked with a solvent or paper before placing the ceramic green sheet. Yes.

  The screen printing apparatus is provided with an adhesive layer for fixing a printing material on the surface of the screen printing table, and the screen printing table can be relatively moved between the screen printing unit and the printing material attaching / detaching unit to form an adhesive layer. The adhesive can attach and detach the printed part, and has an adhesive strength that does not remain on the printed material when the printed material is peeled off from the screen printing table, and is vertically and horizontally between the screen printed part and the printed material detachable part. A movable adhesive coating roller is provided, and the adhesive coating roller forms the adhesive strength slightly stronger than the adhesive strength of the adhesive layer of the screen printing table, and after the substrate is removed from the screen printing table, the screen printing table There has been proposed one that maintains the adhesive performance of the adhesive layer by cleaning the surface with an adhesive application roller (see, for example, Patent Document 1). ). According to this, it is possible to provide a screen printing apparatus capable of stably fixing a substrate to be printed on a screen printing table.

  In the screen plate cleaning method and device, an adhesive film and a roll wiper such as a continuous cleaning sheet are arranged between the screen printing table and the screen plate, and the paste adhering to the back of the screen plate is pushed out with a squeegee. There has been proposed one that is transferred to a roll wiper and removed (see, for example, Patent Document 2 and Patent Document 3). According to these, the screen plate can be easily cleaned.

JP 2004-106366 A JP 2001-171090 A JP 2002-254608 A

However, the conventional screen printing table cleaning method, screen printing apparatus, or screen plate cleaning apparatus and cleaning method as described above have the following problems.
(1) In the conventional screen printing table cleaning method, in order to clean the screen printing table, the screen printing machine is stopped each time, and the person adheres to the table with cloth or paper soaked with solvent. Wipe off the conductive paste, and after wiping it, it is time-consuming and time-consuming because the solvent attached on the table is checked for drying and the table is wiped again with a dry cloth or paper. At the same time, work efficiency is reduced, resulting in increased product costs.
(2) In the screen printing table cleaning apparatus in the screen printing apparatus disclosed in Japanese Patent Application Laid-Open No. 2004-106366, the adhesive application roller adheres all of the conductor paste immediately after printing attached on the screen printing table. In addition, the conductive paste adhered to the adhesive application roller may contaminate the upper surface of the screen printing table in other portions, and the screen printing table cannot be cleaned. In addition, the adhesive application roller has a form in which the cleaning on the screen printing table cannot be stably maintained because the adhesive strength rapidly decreases due to the state of conductor paste adhering to the screen printing table and repeated use. ing.
(3) In the screen plate cleaning device and method disclosed in Japanese Patent Application Laid-Open No. 2001-171090, Japanese Patent Application Laid-Open No. 2002-254608, etc., a film, a sheet, or the like between the screen printing table and the screen plate When the roll wiper is disposed, the roll wiper surface is brought into contact with the screen printing table. For example, even if the squeegee is pressed through the screen plate with the squeegee, it adheres to the screen printing table. Since the roll wiper is only pressed flat on the conductive paste, the screen printing table cannot be sufficiently cleaned.

  The present invention has been made in view of such circumstances, and provides a cleaning method and apparatus for a screen printing table that easily and surely cleans the screen printing table and prevents an increase in the cost of the product. Objective.

  A method for cleaning a screen printing table according to the present invention that meets the above-described object is to place a rectangular ceramic green sheet having a through hole on a screen printing table that can freely reciprocate, and apply a conductive paste to the wall surface of the through hole. Alternatively, a method for cleaning a screen printing table in which the ceramic green sheet filled in the through hole is removed from the screen printing table and then cleaned on the screen printing table, the cleaning method being greater than the width of the ceramic green sheet with respect to the operating direction of the screen printing table. A portion of a roll wiper made of non-woven fabric having a size width that is impregnated with a solvent in a straight line in the width direction is brought into contact with the screen printing table, and the screen printing table is moved forward to clean the screen printing table while being wetted with the solvent. And the dry part that does not impregnate the roll wiper with the solvent is brought into contact with the screen printing table, and the screen printing table is moved forward to finish cleaning the screen printing table while wiping off the solvent adhering to the screen printing table. The process of carrying out.

  Here, as for the above-described method for cleaning the screen printing table, it is preferable that the cleaning on the screen printing table and the finishing cleaning are performed separately for each forward operation of the screen printing table, or once for each.

  In the above-described method for cleaning the screen printing table, the roll wiper is preferably made of a polyester fiber sheet, and the solvent is preferably made of alcohol.

  A cleaning device for a screen printing table according to the present invention that meets the above-described object is a method of placing a rectangular ceramic green sheet having a through hole on a screen printing table that can freely reciprocate, and applying a conductive paste to the wall surface of the through hole. Or a cleaning device for a screen printing table for cleaning the screen printing table after the ceramic green sheet filled in the through hole is taken out from the screen printing table, the width of the ceramic green sheet with respect to the operating direction of the screen printing table A feeding roller for feeding a roll wiper made of nonwoven fabric having the above width, a winding roller for winding the roll wiper above the feeding roller, and a screen printing table below the feeding roller A cleaning roller provided by pressing the width direction of the roll wiper linearly from the back surface at a position between the roller and a feeding roller by pressing the width direction of the roll wiper linearly from the back surface between the cleaning roller and the take-up roller. Containing a cleaning unit that has an auxiliary roller for preventing contact with the screen, and that can be moved up and down above the screen printing table, and that is provided integrally with the screen printing table in front of the screen printing table. The cleaning unit having the cleaning roller located immediately above the sponge body is lowered, the mechanism for bringing the sponge body into contact with the roll wiper pressed by the cleaning roller and impregnating the solvent, and the cleaning unit is raised. However, the screen printing table starts to move forward, the cleaning unit descends again, and the part pressed by the cleaning roller The wiper is brought into contact with the upper surface of the front end of the screen printing table and cleaning is started with the roll wiper. The screen printing table is moved forward and the upper surface of the screen printing table is wetted with the solvent impregnating the roll wiper. The screen printing table starts to be restored while the cleaning unit is raised, the front end of the screen printing table is moved to a position where the cleaning roller is directly above, and the take-up roller is a roll wiper. A mechanism for supplying a clean roll wiper to a portion of the roll wiper that is pressed by the cleaning roller and a cleaning unit that is lowered and is not impregnated with the solvent of the portion that is pressed by the cleaning roller Clean roll wiper on top of front end of screen printing table The screen cleaning table is moved forward, and the screen printing table is moved forward, and the screen wiper removes the solvent adhering to the upper surface of the screen printing table and cleans it with the roll wiper. The part where the printing table starts to return and the sponge body of the screen printing table is moved to the position where the cleaning roller is directly above, and the winding roller winds up the roll wiper by a predetermined amount and is pressed by the cleaning roller The roll wiper has a mechanism for supplying a clean roll wiper.

  Another cleaning device for a screen printing table according to the present invention that meets the above-mentioned object is to place a rectangular ceramic green sheet having a through hole on a screen printing table that can freely reciprocate, and to place a conductive paste on the wall surface of the through hole. A cleaning device for a screen printing table for cleaning the screen printing table after removing the ceramic green sheet that has been applied or filled in the through-hole from the screen printing table. A feed roller for feeding a roll wiper made of nonwoven fabric having a width greater than the width dimension, a take-up roller for winding the roll wiper above the feed roller, and a screen printing table below the feed roller The first and second portions are arranged in parallel with each other at a position between the upper surface and the upper surface of the screen printing table when the width direction of the roll wiper is linearly pressed from the rear surface. The width direction of the roll wiper is linearly pressed from the back surface between the cleaning roller and the second cleaning roller that follows the first cleaning roller that presses the roll wiper fed from the feeding roller from the back surface. It has an auxiliary roller to prevent contact with the feeding roller, and has a cleaning unit that can move up and down above the screen printing table, and is integrated with the screen printing table in front of the screen printing table. A cleaning unit having a first cleaning roller located directly above the solvent-containing sponge body provided is lowered, and the sponge body is moved to the sponge body by the first cleaning roller. The screen wiper starts to move forward while the cleaning unit is raised and the cleaning unit is lowered again. A mechanism in which the roll wiper pressed by the cleaning roller is brought into contact with the upper surface of the front end of the screen printing table and cleaning is started by the roll wiper, and the screen printing table is operated in a state where the cleaning unit is lowered, The upper surface of the screen printing table is cleaned with the roll wiper while being wetted with the solvent impregnated in the portion of the roll wiper pressed by the first cleaning roller, and also follows the portion of the roll wiper pressed by the first cleaning roller. Clean roll wiper that is not impregnated with the solvent pressed by the second cleaning roller The finish cleaning is performed while wiping off the solvent adhering to the upper surface of the screen printing table, and the screen printing table starts to operate again while the cleaning unit is raised, and the first cleaning roller moves the position of the sponge body of the screen printing table. In addition to being moved to a position directly above, the take-up roller has a mechanism for taking up the roll wiper by a predetermined amount and supplying a clean roll wiper to the portion of the roll wiper pressed by the first and second cleaning rollers.

  The above screen printing table cleaning method is such that a rectangular ceramic green sheet provided with a through hole is placed on a screen printing table that can freely reciprocate, and a conductive paste is applied to the wall surface of the through hole or filled in the through hole. A method for cleaning a screen printing table for removing the ceramic green sheet from the screen printing table and then cleaning the screen printing table, the nonwoven fabric having a width greater than or equal to the width of the ceramic green sheet in the operating direction of the screen printing table A portion of the roll wiper that has been impregnated with the solvent in a straight line in the width direction is brought into contact with the screen printing table, the screen printing table is moved forward, and the screen printing table is cleaned while being wetted with the solvent; Since there is a process of finishing and cleaning the screen printing table while bringing the dry part not impregnated with the solvent into the par on the screen printing table and moving the screen printing table forward and wiping off the solvent adhering to the screen printing table. , Wiped with a solvent on the top surface of the screen printing table, and cleaned with a roll wiper made of non-woven fabric with excellent strength balance between warp and weft, and then finished with a roll wiper that does not impregnate the solvent. To provide a method for cleaning a screen printing table that can be easily cleaned without taking time, and that can prevent adhesion of a conductive paste or the like to a ceramic green sheet to improve product yield and prevent an increase in product cost. Can do.

  In particular, the above screen printing table cleaning method performs the cleaning of the screen printing table and the finishing cleaning separately for the forward operation of the screen printing table, or for each operation at once. It is possible to provide a cleaning method for a screen printing table that can easily clean the top surface of the table and finish cleaning without taking time, improve the product yield, and prevent the cost of the product from increasing. In addition, when cleaning and finishing cleaning on the screen printing table is performed once in the forward operation of the screen printing table, further cleaning and finishing cleaning can be performed without taking time, so the screen prevents the cost of the product from increasing. A printing table cleaning method can be provided.

  In particular, the cleaning method for the screen printing table described above is because the roll wiper is made of a polyester fiber sheet and the solvent is made of alcohol, so that the polyester fiber sheet has high durability and chemical resistance, and has low toxicity and high solubility. It is possible to provide a cleaning method for a screen printing table which can be easily cleaned and finished with alcohol, and can be easily washed and reused by the roll wiper itself, thereby preventing an increase in the cost of the product.

  The above-mentioned screen printing table cleaning device places a rectangular ceramic green sheet having a through hole on a screen printing table that can be reciprocated, and applies a conductive paste to the wall surface of the through hole or fills the through hole. A cleaning device for a screen printing table for removing the ceramic green sheet from the screen printing table and then cleaning the screen printing table, wherein the ceramic green sheet has a width larger than the width of the ceramic green sheet in the operating direction of the screen printing table. A roll wiper at a position between a feed roller for feeding a roll wiper made of non-woven fabric, a take-up roller for winding the roll wiper above the roll wiper, and an upper surface of the screen printing table below the feed roller A cleaning roller provided by pressing the width direction linearly from the back surface, and an auxiliary roller for preventing the contact with the feeding roller by pressing the width direction of the roll wiper linearly from the back surface between this and the take-up roller And a cleaning unit that can be moved up and down above the screen printing table, and has a cleaning roller located directly above the solvent-containing sponge body that is integrally provided with a space in front of the screen printing table. The cleaning unit descends and the screen wiper starts moving forward while the cleaning unit is raised, with the mechanism that the sponge wiper comes into contact with the roll wiper of the part pressed by the cleaning roller, and the cleaning unit rises. The cleaning unit is lowered, and the part of the roll wiper pressed by the cleaning roller hits the upper surface of the front end of the screen printing table. The screen wiper starts cleaning with the roll wiper, and the screen printing table is moved forward and the upper surface of the screen printing table is cleaned with the roll wiper while being wetted with the solvent impregnating the roll wiper. The printing table starts to return and moves the position of the front end of the screen printing table to a position where the cleaning roller is directly above, and the winding roller winds up the roll wiper by a predetermined amount and is pressed by the cleaning roller. A mechanism for supplying a clean roll wiper to a part of the roll wiper, and a cleaning unit is lowered, and a clean roll wiper not impregnated with the solvent pressed by the cleaning roller is attached to the upper surface of the front end of the screen printing table. And finish cleaning with a roll wiper. The screen printing table goes back and forth, the mechanism that cleans the surface of the screen printing table with a roll wiper while wiping off the solvent adhering to the upper surface of the screen printing table, A mechanism that moves the position of the sponge body to a position where the cleaning roller is directly above, and the take-up roller winds up the roll wiper by a predetermined amount, and supplies a clean roll wiper to the roll wiper of the portion pressed by the cleaning roller. Therefore, there is provided a cleaning device for a screen printing table capable of continuously cleaning the top surface of the screen printing table by reciprocating the screen printing table twice and finishing cleaning by reciprocating the screen printing table. Can be provided.

  Another cleaning device for the above screen printing table is to place a rectangular ceramic green sheet provided with a through hole on a screen printing table that can freely reciprocate, and apply a conductive paste to the wall surface of the through hole, or within the through hole. Is a screen printing table cleaning device for cleaning the screen printing table after the ceramic green sheet filled in is removed from the screen printing table, and is larger than the width of the ceramic green sheet with respect to the operating direction of the screen printing table. In a position between a feeding roller for feeding out a roll wiper made of a nonwoven fabric having a width, a winding roller for winding up the roll wiper, and an upper surface of a screen printing table below the feeding roller, roll The first and second cleaning rollers provided in parallel with each other when the width direction of the Iper is linearly pressed from the back surface and in contact with the upper surface of the screen printing table are fed from the feeding roller. Between the second cleaning roller and the take-up roller following the first cleaning roller that presses the roll wiper from the back surface, in order to prevent the contact with the feeding roller by pressing the width direction of the roll wiper linearly from the back surface A cleaning unit that can move up and down above the screen printing table, and is located directly above the solvent-containing sponge body provided integrally with the screen printing table in front of the screen printing table. The cleaning unit having the first cleaning roller is lowered, and the roll of the portion pressed against the sponge body by the first cleaning roller A part that is in contact with the solvent and impregnated with the solvent, and the screen printing table starts moving forward while the cleaning unit is raised, and the cleaning unit is lowered again and pressed by the first cleaning roller. The roll wiper is brought into contact with the upper surface of the front end portion of the screen printing table and cleaning is started by the roll wiper, and the screen printing table is moved forward with the cleaning unit lowered, and the upper surface of the screen printing table is moved to the first position. While being wetted with the solvent impregnated in the part of the roll wiper pressed by the cleaning roller, the roll wiper is used for cleaning, and the part is pressed by the second cleaning roller that follows the part of the roll wiper pressed by the first cleaning roller. Adhering to the upper surface of the screen printing table with a clean roll wiper that is not impregnated with solvent A mechanism that finishes cleaning while wiping off the solvent, and the screen printing table starts returning while the cleaning unit is raised, and the position of the sponge body of the screen printing table is moved to a position where the first cleaning roller is directly above, Since the winding roller has a mechanism for winding the roll wiper by a predetermined amount and supplying a clean roll wiper to the portion of the roll wiper pressed by the first and second cleaning rollers, the first and second interlocking It is possible to provide a screen printing table cleaning device capable of easily and efficiently cleaning and finishing cleaning the upper surface of the screen printing table at once by the cleaning roller, and capable of easily winding the roll wiper.

(A) and (B) are a front view and a side view, respectively, of a screen printing table cleaning device according to an embodiment of the present invention. (A)-(C) is explanatory drawing of a partial operation | movement of the cleaning apparatus of the screen printing table, respectively. (A)-(C) is explanatory drawing of a partial operation | movement of the cleaning apparatus of the screen printing table, respectively. (A), (B) is the front view and side view of the cleaning apparatus of the other screen printing table which concerns on one embodiment of this invention, respectively. (A)-(C) is explanatory drawing of a partial operation | movement of the cleaning apparatus of the other screen printing table, respectively. (A), (B) is explanatory drawing of a partial operation | movement of the cleaning apparatus of the other screen printing table, respectively.

Next, the best mode for carrying out the method for cleaning the screen printing table according to the embodiment of the present invention will be described for the understanding of the present invention.
Usually, in order to form a ceramic package with a screen printer, a rectangular ceramic green sheet made of a ceramic such as alumina or aluminum nitride is used. In order to form a ceramic package, a conductive paste is used which is prepared by mixing a high melting point metal such as tungsten or molybdenum with a resin or a solvent. Then, each of the plurality of ceramic green sheets is placed on a screen printing table provided in a screen printing machine, and a conductor paste is screen-printed on the surface to electrically connect the wiring conductor and the ceramic package between the upper and lower sides. Via conductors, through-hole conductors, and the like are formed to form a conductive state. In order to form a wiring conductor on the surface, a ceramic green sheet is placed on a screen printing table of a screen printing machine, and a conductor pattern is formed on the surface using a screen plate, a squeegee, and a conductor paste. . In order to form the via conductor, a through hole is first provided in these ceramic green sheets, and the ceramic green sheet provided with the through holes is placed on a screen printing table of a screen printing machine, and a screen is formed. A via, a squeegee, and a conductor paste are used to fill the via holes with the conductor paste. Furthermore, in order to form the above-described through-hole conductors, first, through holes are provided in these ceramic green sheets, and the ceramic green sheets provided with the through holes are placed on a screen printing table of a screen printing machine. The conductor paste is applied to the wall surface of the hole for the through hole using a screen plate, a squeegee, and a conductor paste. The plurality of ceramic green sheets on which these are formed are superposed and joined to each other by applying temperature and pressure to form a laminated body.

  Filling the via holes with the conductive paste is performed by placing a ceramic green sheet on a flat screen printing table, moving the screen printing table to the lower side of the screen plate, and placing the ceramic green sheet on the screen plate. Taken directly below, the conductor paste on the screen plate is scraped out with a squeegee and filled into the via hole of the ceramic green sheet. In addition, the conductor paste is applied to the wall surface of the hole for the through hole described above on the screen printing table provided with a through hole for sucking the conductor paste that matches the position of the hole for the through hole of the ceramic green sheet. Place the green sheet with the hole position aligned, move the ceramic green sheet on the screen printing table to the lower side of the screen plate, bring the ceramic green sheet directly under the screen plate, and the conductor paste on the screen plate Is sucked out through a through-hole provided in the screen printing table while scraping it out with a squeegee, so that the central portion of the through-hole for the ceramic green sheet is hollowed and the conductive paste is applied only to the wall surface. In the filling and application of the above-mentioned conductor paste, the conductor paste directly wraps around the upper surface of the screen printing table or the peripheral portion of the through hole for suctioning the conductor paste through the through hole provided in the ceramic green sheet. There is a problem that it adheres and the screen printing table becomes dirty.

  The above-mentioned ceramic green sheet laminate is usually composed of an assembly in which a plurality of individual ceramic packages are arranged in the sheet, so that the outer shape of the individual pieces is formed on the surface of the laminate. A pressing groove that divides into two is formed. And the laminated body in which the pressing groove is formed is formed into a fired body by simultaneously firing a ceramic green sheet and a refractory metal in a reducing atmosphere, forming a plating film on the conductor part, or if necessary, the conductor part After a seal ring is brazed, a plating film is formed again on the metal portion exposed on the surface, and then divided by a pressing groove to form a single-piece ceramic package.

  A method for cleaning a screen printing table according to an embodiment of the present invention includes a conductive paste that adheres to the surface of a screen printing table provided in such a screen printing machine, the vicinity of a suction through-hole of the screen printing table, and ceramic green. This is a novel cleaning method for removing ceramic scraps spilled from the end face of a sheet by operating a screen printing table. This screen printing table cleaning method is a solvent that can dissolve a resin, a solvent, and the like in a conductive paste into a roll wiper made of a nonwoven fabric having a width larger than the width of the ceramic green sheet with respect to the direction of operation of the screen printing table. Is impregnated linearly in the width direction. And the cleaning method of the screen printing table is such that the roll wiper part impregnated with the solvent is brought into contact with the screen printing table, and the conductive paste adhered on the screen printing table is wetted with the solvent to dissolve the resin, the solvent, etc. In addition, there is a step of cleaning the screen printing table while wiping the conductive paste with a roll wiper by moving the screen printing table so that the refractory metal is entrained in a resin or a solvent. In addition, the ceramic waste falling on the screen printing table can be easily removed by wiping with a roll wiper by the process of cleaning the screen printing table. In addition, the roll wiper is a non-woven fabric with an excellent balance between vertical and horizontal strength that is joined by an adhesive that is not a woven fabric such as a woven yarn, so that the screen printing table is operated while being fixed on the screen printing table. Even if it is made to occur, there is no occurrence of yarn twisting or the like, and the wiping effect can be enhanced.

  On the screen printing table where the conductive paste adhered on the screen printing table is cleaned by the roll wiper part impregnated with the above solvent, the solvent exudes from the roll wiper impregnated with the solvent and contains a slight conductor pace component. Is attached. Therefore, this screen printing table cleaning method is such that a dry roll wiper portion not impregnated with a solvent is brought into contact with the screen printing table, and the screen printing table is moved forward to remove the solvent adhering to the screen printing table. And cleaning the finish on the screen printing table by wiping with a dry roll wiper. In addition, since the roll wiper which consists of nonwoven fabrics is excellent in intensity | strength, it can be used repeatedly after washing the solvent etc. which wiped off.

  This screen printing table cleaning method is a forward operation of the screen printing table, that is, the screen printing table after the screen printing is performed on the ceramic green sheet on the screen printing table is restarted, and the ceramic green sheet on the screen printing table is restored. After the screen is taken out, the conductive paste on the upper surface of the screen printing table can be cleaned by fixing the roll wiper when the screen printing table is moved forward. Therefore, the screen printing table cleaning method is not performed manually, but can be automatically performed, can be easily performed without taking time, and the screen printing table can be cleaned reliably. Since the ceramic green sheet placed on the table is not soiled, the product yield can be improved and the cost of the product can be prevented from increasing.

  In the above screen printing table cleaning method, the screen printing table is moved forward at the time of cleaning with the roll wiper portion impregnated with the solvent on the screen printing table, and the dry roll wiper portion without impregnating the solvent on the screen printing table. It is preferable that the screen printing table is moved forward or backward at the time of finish cleaning in the above or separately. Cleaning and finishing cleaning of these screen printing tables in the forward operation are not performed manually, but when the screen printing table is operating in the forward direction, the roll wiper is fixed so that the cleaning can be performed automatically and reliably. In addition, it is possible to improve the yield of a product made from a printed material placed after cleaning without taking time, and to prevent an increase in the cost of the product.

  In the screen printing table cleaning method described above, the roll wiper is preferably made of polyester fiber. In the above-described method for cleaning the screen printing table, the solvent is preferably made of methanol or alcohol such as ethanol. The above-mentioned roll wiper made of polyester fiber can remove fine dirt with a high-density non-woven fabric of polyester ultra-fine fibers, and can improve the yield of products made from the substrate to be placed after cleaning. Therefore, it is possible to prevent the cost of the product from increasing. In addition, roll wipers made of polyester fibers are superior in alcohol resistance and wear resistance, and can withstand repeated use without causing fiber waste even after washing, increasing product costs. Can be prevented. In addition, the solvent made of alcohol can easily dissolve the solvent and resin in the conductor paste, easily remove the dirt, and is inexpensive for industrial use. The yield of products made from printed materials can be improved, and the cost of products can be prevented from increasing.

  Next, referring to FIGS. 1A, 1B, 2A to 2C, and FIGS. 3A to 3C, the screen printing table according to the embodiment of the present invention is cleaned. The best mode for embodying the apparatus will be described for understanding the present invention. Here, FIGS. 1A and 1B are a front view and a side view, respectively, of a screen printing table cleaning device according to an embodiment of the present invention, and FIGS. 3 (A) to 3 (C) are explanatory views of a partial operation of the cleaning device for the screen printing table. In addition, in the said drawing, it does not show in figure about the structure which connects a separate structure.

  As shown in FIGS. 1 (A) and 1 (B), the screen printing table cleaning device 10 mounts a rectangular ceramic green sheet having a through hole on a screen printing table 11 which can freely reciprocate a screen printing machine. It is an apparatus for cleaning the screen printing table 11 after the ceramic green sheet is placed and applied to the wall surface of the through hole or the ceramic green sheet filled in the through hole is taken out from the screen printing table 11. Note that the screen printing table 11 that can freely reciprocate the screen printing machine is that the forward operation is an entry operation of the screen printing table 11 just below the screen plate (not shown), and the backward operation is the screen printing table 11 of the screen printing table 11. This means a return operation from directly below. The screen printing table 11 has a suction hole for adsorbing the ceramic green sheet in the base itself, or a suction for adsorbing the ceramic green sheet on the base through which the interior is perforated. All tables on which ceramic green sheets are directly placed, such as those equipped with chuck plates provided with holes, are generically named.

  The screen printing table cleaning device 10 includes a cleaning unit 12 that is movable up and down above the screen printing table 11. The cleaning unit 12 has a feeding roller 14 made of a cylindrical body for feeding a roll wiper 13 made of a roll-shaped nonwoven fabric having a width larger than the width of the ceramic green sheet with respect to the operating direction of the screen printing table 11. doing. The feeding roller 14 includes a resistor for preventing the roll wiper 13 made of a nonwoven fabric, to which the core of the roll-shaped roll wiper 13 is fixed and attached, from rotating excessively. The roll wiper 13 is constantly pulled toward the feeding roller 14 side. Further, the cleaning unit 12 has a winding roller 15 formed of a cylindrical body for winding the roll wiper 13 above the feeding roller 14. The take-up roller 15 is provided with a reverse rotation preventing body that reversely rotates to prevent the roll-shaped roll wiper 13 from slackening. The length can be wound up. Further, the cleaning unit 12 is a cleaning roller 16 made of a cylindrical body that is provided by pressing the width direction of the roll wiper 13 linearly from the back surface at a position between the upper surface of the screen printing table 11 below the feeding roller 14. And an auxiliary roller 17 made of one or a plurality of cylindrical bodies for preventing the contact with the feeding roller 14 by pressing the width direction of the roll wiper 13 linearly between the cleaning roller 16 and the take-up roller 15 from the back surface. have. The cleaning roller 16 and the auxiliary roller 17 can be rotated forward and backward, and the roll wiper 13 can be rotated by following the winding of the roll wiper 13 of the winding roller 15. The cleaning unit 12 is not particularly limited in the positional relationship between the feeding roller 14, the take-up roller 15, and the cleaning roller 16, but in order to make the mounting area to the screen printer as narrow as possible, The feeding roller 14, the take-up roller 15, and the cleaning roller 16 are preferably provided in a positional relationship that is substantially perpendicular to the upper surface of the screen printing table 11.

  As shown in FIG. 2A, the above-described screen printing table cleaning device 10 is spaced from the screen printing table 11 in front of the screen printing table 11, that is, in front of the screen printing table 11 when it is operating. The cleaning unit 12 having the cleaning roller 16 positioned directly above the solvent-containing sponge body 18 provided as a unit is lowered. Then, the screen printing table cleaning device 10 causes the portion of the roll wiper 13 pressed by the cleaning roller 16 provided at the lowermost end of the cleaning unit 12 to abut the solvent-containing sponge body 18, It has a mechanism for impregnating the roll wiper 13 with a solvent. The shape of the sponge body 18 is not particularly limited, but the contact surface of the portion that is pressed by the cleaning roller 16 with the roll wiper 13 has a width smaller than the diameter of the cleaning roller 16, and It is preferable that the cross-sectional shape immersed in the bathtub into which the solvent was inject | poured has a prismatic rod-shaped body which consists of a square, a trapezoid, a convex shape, etc. which have a length about length. The sponge body 18 is not particularly limited in its material, but is preferably made of a synthetic resin that is resistant to a solvent and rich in water absorption. The portion of the roll wiper 13 that is pressed by the cleaning roller 16 abuts on the sponge body 18 so that the solvent contained in the sponge body 18 can be impregnated with appropriate spread.

  Next, in the screen printing table cleaning device 10 described above, the screen printing table 11 starts the forward operation while the cleaning unit 12 moves up. Then, as shown in FIG. 2B, the screen printing table cleaning device 10 has the cleaning unit 12 lowered again, and the portion of the roll wiper 13 pressed by the cleaning roller 16 is moved forward of the screen printing table 11. It has a mechanism that is brought into contact with the upper surface of the end and starts cleaning the upper surface of the screen printing table 11 with the roll wiper 13. At the same time, the screen printing table cleaning device 10 rolls while the screen printing table 11 is in operation and the upper surface of the screen printing table 11 is wetted with a solvent impregnated in the portion of the roll wiper 13 pressed by the cleaning roller 16. It has a mechanism for cleaning with the wiper 13. In the screen printing table cleaning device 10, when the winding roller 15 is not operated, the roll wiper 13 is pulled from both sides by the feeding roller 14 and the winding roller 15, and the roll wiper 13 is slack. Since this does not occur, cleaning of the upper surface of the screen printing table 11 and finishing cleaning described later can be performed in a state in which the roll wiper 13 of the portion pressed by the cleaning roller 16 is fixed. Further, the roll wiper 13 used in the screen printing table cleaning device 10 is a non-woven fabric excellent in balance between vertical and horizontal strength bonded by an adhesive which is not a woven fabric obtained by weaving yarn. Even if the screen printing table 11 is operated in a fixed state, there is no occurrence of yarn twist or the like, and the wiping effect by the above cleaning can be enhanced.

  Next, as shown in FIG. 2C, in the screen printing table cleaning device 10 described above, the screen printing table 11 starts to operate again while the cleaning unit 12 moves up. The screen printing table cleaning device 10 has a mechanism for moving the position of the front end of the screen printing table 11 to a position where the cleaning roller 16 is directly above. At the same time, the screen printing table cleaning device 10 has a mechanism for supplying the roll wiper 13 to the take-up cleaning roller 16 with a predetermined amount of the roll wiper 13 by the take-up roller 15. In this screen printing table cleaning device 10, the portion of the roll wiper 13 pressed by the cleaning roller 16 is brought into contact with the sponge body 18 having a width smaller than the diameter of the cleaning roller 16. The impregnation of the roll wiper 13 with the solvent in the portion that has been performed can be suppressed to a portion that is less than or equal to a half circumference of the cleaning roller 16. Therefore, the screen printing table cleaning device 10 rotates the roll wiper 13 by the take-up roller 15 by a predetermined amount, and rotates the cleaning roller 16 by approximately half a rotation, so that the clean roll wiper 13 not impregnated with the solvent is used. Can be supplied to the contact surface with the screen printing table 11.

  Next, as shown in FIG. 3 (A), the cleaning device 10 for the screen printing table is dry, in which the cleaning unit 12 is lowered and the portion of the solvent pressed by the cleaning roller 16 is not impregnated. A clean roll wiper 13 is brought into contact with the upper surface of the front end of the screen printing table 11. The screen printing table cleaning device 10 has a mechanism for starting the final cleaning of the upper surface of the screen printing table 11 with a dry clean roll wiper 13 by starting the forward operation of the screen printing table 11. At the same time, the screen printing table cleaning device 10 is operated by the screen printing table 11 going forward, and the upper surface of the previous screen printing table 11 is cleaned while being wetted with the solvent impregnating the roll wiper 13. 11 It has a mechanism for finishing and cleaning with the roll wiper 13 while wiping off the solvent adhering to the upper surface. In addition, the roll wiper 13 used in this finish cleaning is vertically and horizontally joined with an adhesive that is not a woven fabric in which yarns are woven, as in the case of cleaning with the roll wiper 13 impregnated with the solvent. Even if the screen printing table 11 is moved forward in a state of being fixed on the screen printing table 11, there is no occurrence of yarn twisting and the wiping effect by finishing cleaning can be enhanced.

  Next, as shown in FIG. 3B, in the screen printing table cleaning device 10 described above, the screen printing table 11 starts to operate again while the cleaning unit 12 moves up. As shown in FIG. 3C, the screen printing table cleaning apparatus 10 has a mechanism for moving the position of the sponge body 18 of the screen printing table 11 to a position where the cleaning roller 16 is directly above. At the same time, in the screen printing table cleaning device 10, the winding roller 15 winds up the roll-shaped roll wiper 13 by a predetermined amount, and the portion of the roll wiper 13 pressed by the cleaning roller 16 is clean and clean. 13 is provided.

  The screen printing table cleaning device 10 does not particularly limit the roller diameter of the cleaning roller 16, but the roller diameter of the cleaning roller 16 is preferably about φ10 to 30 mm. When the roller diameter is 10 to 30 mm, the cleaning roller 16 can be appropriately brought into contact with the sponge body 18 so that the roll wiper 13 can be impregnated with a solvent in an appropriate area range, and a screen printing table. It is possible to provide an apparatus that can sufficiently clean the area of contact with the upper surface of 11 and can be cleaned without generating wiping residue. In addition, the cleaning roller 16 has a roller diameter of φ10 to 30 mm, and when not impregnated with a solvent, a sufficient contact area with the upper surface of the screen printing table 11 can be taken, and finishing cleaning can be performed without generating wiping residue. An apparatus can be provided. Further, when the roller diameter is 10 to 30 mm, the cleaning roller 16 is a screen printing table provided with the roll wiper 13 that can be used for a long time by setting the winding amount of the roll wiper 13 to an appropriate amount and less frequently replaced. The cleaning device 10 can be provided. When the roller diameter of the cleaning roller 16 is less than 10 mm, the area range when the roll wiper 13 is impregnated with the solvent becomes too narrow and the solvent is impregnated or not impregnated. However, since the contact area with the upper surface of the screen printing table 11 is reduced, wiping residue may occur. If the roller diameter of the cleaning roller 16 exceeds φ30 mm, the area of the roll wiper 13 impregnated with the solvent becomes too large, and the winding amount of the roll wiper 13 by the winding roller 15 becomes too large. The roll-shaped wiper 13 is frequently replaced, which may reduce the work efficiency.

  Next, referring to FIGS. 4A, 4B, 5A to 5C, and FIGS. 6A, 6B, another screen printing table according to an embodiment of the present invention. The best mode for embodying the cleaning apparatus will be described for the understanding of the present invention. Here, FIGS. 4A and 4B are a front view and a side view, respectively, of another screen printing table cleaning device according to an embodiment of the present invention, and FIGS. FIGS. 6A and 6B are explanatory views of a partial operation of the other screen printing table cleaning device.

  As shown in FIGS. 4A and 4B, the other screen printing table cleaning device 10a has a rectangular ceramic green sheet provided with a through hole on the screen printing table 11 that can freely reciprocate the screen printing machine. The device is for cleaning the screen printing table 11 after removing the ceramic green sheet placed on the surface and applying the conductive paste to the wall surface of the through hole or filling the through hole from the screen printing table 11. Note that the screen printing table 11 that can freely reciprocate the screen printing machine is that the forward operation is an entry operation of the screen printing table 11 just below the screen plate (not shown), and the backward operation is the screen printing table 11 of the screen printing table 11. This means a return operation from directly below. The screen printing table 11 has a suction hole for adsorbing the ceramic green sheet in the base itself, or a suction for adsorbing the ceramic green sheet on the base through which the interior is perforated. All tables on which ceramic green sheets are directly placed, such as those equipped with chuck plates provided with holes, are generically named.

  The screen printing table cleaning device 10 a includes a cleaning unit 12 a that can move up and down above the screen printing table 11. The cleaning unit 12a has a feeding roller 14 made of a cylindrical body for feeding a roll-shaped roll wiper 13 made of a nonwoven fabric having a width larger than the width of the ceramic green sheet in the operating direction of the screen printing table 11. doing. The feeding roller 14 includes a resistor for preventing the roll-shaped roll wiper 13 to which the core of the roll-shaped roll wiper 13 is fixed and attached from being idle and being excessively fed. The roll wiper 13 is constantly pulled toward the feeding roller 14 side. Further, the cleaning unit 12 a has a winding roller 15 made of a cylindrical body for winding the roll wiper 13 above the feeding roller 14. The take-up roller 15 is provided with a reverse rotation preventing body that reversely rotates to prevent the roll-shaped roll wiper 13 from slackening. The length can be wound up. Further, the cleaning unit 12 a presses the width direction of the roll wiper 13 linearly from the back surface at a position between the cleaning roller 12 a and the upper surface of the screen printing table 11 below the feeding roller 14. The first cleaning roller 16a and the second cleaning roller 16b are formed of cylindrical bodies that are provided so that the portions thereof are horizontally aligned with each other. Further, the cleaning unit 12 a is provided between the second cleaning roller 16 b and the take-up roller 15 following the first cleaning roller 16 a that linearly presses the width direction of the roll wiper 13 fed from the feeding roller 14 from the back surface. Further, the roll wiper 13 has an auxiliary roller 17 made of one or a plurality of cylindrical bodies for pressing the width direction of the roll wiper 13 linearly from the back surface to prevent contact with the feeding roller 14. The first and second cleaning rollers 16a and 16b and the auxiliary roller 17 are rotatable forward and backward so that the roll wiper 13 can be rotated by following the winding of the winding roller 15. It has become. The cleaning unit 12a is not particularly limited in the positional relationship between the feeding roller 14, the take-up roller 15, and the first and second cleaning rollers 16a and 16b, but is attached to the screen printing machine. In order to make the area as narrow as possible, an intermediate point between the feeding roller 14, the take-up roller 15, and the first and second cleaning rollers 16a and 16b is substantially perpendicular to the upper surface of the screen printing table 11. It is preferable to provide them in a positional relationship.

  As shown in FIG. 5A, the screen printing table cleaning device 10a is spaced in front of the screen printing table 11, that is, in front of the screen printing table 11 when the screen printing table 11 is in operation. Thus, the cleaning unit 12a having the first cleaning roller 16a positioned directly above the solvent-containing sponge body 18 provided as a unit is lowered. The screen printing table cleaning device 10a is a portion of the first and second cleaning rollers 16a, 16b provided at the lowermost end of the cleaning unit 12a that is pressed by the first cleaning roller 16a. The roll wiper 13 is brought into contact with the solvent-containing sponge body 18 and a portion of the roll wiper 13 pressed by the first cleaning roller 16a is impregnated with the solvent. The sponge body 18 is not particularly limited in shape as in the case of the screen printing table cleaning device 10 described above, but the sponge body 18 is in contact with the portion of the roll wiper 13 pressed by the first cleaning roller 16a. The contact surface has a width smaller than the diameter of the first cleaning roller 16a, the length of the length of the first cleaning roller 16a, and a cross-sectional shape immersed in a bath in which a lower part is injected with a solvent. It is preferably made of a prismatic rod having a quadrangular shape, a trapezoidal shape, a convex shape or the like. The sponge body 18 is not particularly limited in its material, but is preferably made of a synthetic resin that is resistant to a solvent and rich in water absorption. The portion of the roll wiper 13 that is pressed by the first cleaning roller 16a contacts the sponge body 18 so that the solvent contained in the sponge body 18 can be impregnated with an appropriate spread. .

  Next, the screen printing table cleaning device 10a is configured such that the screen printing table 11 starts the forward operation while the cleaning unit 12a moves up. Then, as shown in FIG. 5B, the screen printing table cleaning device 10a is configured such that the cleaning unit 12a descends again and the portion of the roll wiper 13 pressed by the first cleaning roller 16a is moved to the screen printing table. 11 has a mechanism that is brought into contact with the upper surface of the front end portion of 11 and starts cleaning the upper surface of the screen printing table 11 with the roll wiper 13.

  Next, as shown in FIG. 5C, in the screen printing table cleaning device 10a, the screen printing table 11 is moved forward with the cleaning unit 12a lowered, and the upper surface of the screen printing table 11 is moved. Is cleaned by the roll wiper 13 while being wetted with the solvent impregnated in the portion of the roll wiper 13 that is pressed by the first cleaning roller 16a. Along with this cleaning, the screen printing table cleaning device 10a is impregnated with the solvent of the portion pressed by the second cleaning roller 16b following the portion of the roll wiper 13 pressed by the first cleaning roller 16a. There is a clean roll wiper 13 that has a mechanism that exudes from the solvent impregnated into the portion of the roll wiper 13 that is pressed by the first cleaning roller 16a and finish-cleans while wiping off the solvent adhering to the upper surface of the screen printing table 11. doing.

  The screen printing table cleaning device 10a is similar to the screen printing table cleaning device 10 described above. When the winding roller 15 is not operated, the roll wiper 13 is moved by the feeding roller 14 and the winding roller 15. Since the roll wiper 13 is pulled from both sides and the roll wiper 13 is not slackened, the screen printing table 11 is in a state where the roll wiper 13 of the portion pressed by the first and second cleaning rollers 16a and 16b is fixed. It is possible to clean the top surface and finish cleaning. Further, the roll wiper 13 used in the screen printing table cleaning device 10a is similar to the case of the screen printing table cleaning device 10 described above, in which the roll wiper 13 is joined with an adhesive that is not a woven fabric in which yarns are woven. The nonwoven fabric is excellent in lateral strength balance, and even when the screen printing table 11 is moved forward in a state of being fixed on the screen printing table 11, there is no occurrence of yarn twist or the like, and the wiping effect by the above cleaning and finishing cleaning is achieved. Can be high.

  Next, as shown in FIG. 6A, the screen printing table cleaning device 10a is configured such that the screen printing table 11 starts to operate again while the cleaning unit 12a moves up. As shown in FIG. 6B, the screen printing table cleaning device 10a has a mechanism for moving the position of the sponge body 18 of the screen printing table 11 to a position where the first cleaning roller 16a is directly above. ing. At the same time, in the screen printing table cleaning device 10a, the winding roller 15 winds up the roll-shaped roll wiper 13 by a predetermined amount, and the portion of the roll wiper 13 that is pressed by the first and second cleaning rollers 16a and 16b. Has a mechanism for supplying a clean roll wiper 13 free of dirt.

  The above-described screen printing table cleaning device 10a particularly limits the roller diameters of the first and second cleaning rollers 16a and 16b and the gaps between adjacent portions of the first cleaning roller 16a and the second cleaning roller 16b. Although not, the first and second cleaning rollers 16a and 16b have the same diameter of 10 to 30 mm, and 5 mm or more is provided in the vicinity of the first cleaning roller 16a and the second cleaning roller 16b. It is preferable to have a gap. When the first and second cleaning rollers 16a and 16b have a roller diameter of φ10 to 30 mm, the roll wiper 13 pressed by the first cleaning roller 16a and the sponge body 18 are appropriately in contact with each other. The second wiper 13 can be impregnated with a solvent in an appropriate area range, and the first and second cleaning rollers 16a and 16b can be impregnated. It is possible to provide a device that can sufficiently clean the contact area between the upper surface of the screen printing table 11 and the upper surface of the screen printing table 11 and can perform cleaning and finish cleaning without generating wiping residue. Further, a solvent impregnated in the roll wiper 13 pressed by the first cleaning roller 16a by having a gap of 5 mm or more in the vicinity of the first cleaning roller 16a and the second cleaning roller 16b. Can be prevented from bleeding up to the portion of the roll wiper 13 that is pressed by the second cleaning roller 16b and abutting the screen printing table 11, and cleaning by the first cleaning roller 16a and second cleaning can be performed. Both functions of finishing cleaning with the roller 16b can be performed. When the roller diameter of the first and second cleaning rollers 16a and 16b is less than 10 mm, the area range when the roll wiper 13 is impregnated with the solvent is too narrow, and the solvent is impregnated. In addition, since the contact area between the roll wiper 13 that is not impregnated and the top surface of the screen printing table 11 is reduced, unwiping may occur. Further, when the roller diameters of the first and second cleaning rollers 16a and 16b exceed φ30 mm, the winding amount of the roll wiper 13 by the winding roller 15 becomes too large. Frequent replacement may reduce work efficiency. Further, when the gap between the adjacent portions of the first cleaning roller 16a and the second cleaning roller 16b is less than 5 mm, the solvent impregnated in the roll wiper 13 pressed by the first cleaning roller 16a is removed. There is a case where bleeding up to a part of the roll wiper 13 that is pressed by the second cleaning roller 16b comes into contact with the screen printing table 11, and the cleaning by the first cleaning roller 16a and the second cleaning roller. It may not be possible to perform both functions of finish cleaning at 16b. If the gap between the first cleaning roller 16a and the second cleaning roller 16b is too wide, the winding amount of the roll wiper 13 by the winding roller 15 becomes too large. The roll wiper 13 is frequently replaced, and the work efficiency is lowered. In addition, if the gap between the adjacent portions of the first cleaning roller 16a and the second cleaning roller 16b becomes too large, the size of the cleaning unit 12a itself becomes too large and it is difficult to install the screen on a screen printing machine. Therefore, it is most preferable that the gap between the adjacent portions of the first cleaning roller 16a and the second cleaning roller 16b is about 5 to 20 mm.

  The method and apparatus for cleaning a screen printing table according to the present invention mounts an electronic component element such as a semiconductor element or a crystal resonator, and is small and requires high reliability, for example, a mobile phone or a notebook type. In order to form a highly reliable ceramic package incorporated in an electronic device such as a personal computer, it can be used when conductor wiring is formed on a ceramic green sheet by screen printing.

  10, 10a: Screen printing table cleaning device, 11: Screen printing table, 12, 12a: Cleaning unit, 13: Roll wiper, 14: Feeding roller, 15: Winding roller, 16: Cleaning roller, 16a: First Cleaning roller, 16b: second cleaning roller, 17: auxiliary roller, 18: sponge body

Claims (5)

A rectangular ceramic green sheet provided with a through hole is placed on a screen printing table that can freely reciprocate, and a conductive paste is applied to the wall surface of the through hole, or the ceramic green sheet filled in the through hole is applied to the screen. A screen printing table cleaning method for cleaning the screen printing table after taking it out from the printing table,
A portion of the roll wiper made of a nonwoven fabric having a width greater than or equal to the width of the ceramic green sheet with respect to the screen printing table operating direction is contacted on the screen printing table with a portion impregnated with the solvent in the width direction linearly, Cleaning the screen printing table while moving the screen printing table forward and wetting with the solvent;
The screen printing table is brought into contact with a dry portion not impregnated with the solvent on the roll wiper on the screen printing table, and the screen printing table is moved forward to wipe off the solvent adhering to the screen printing table. A method for cleaning a screen printing table, comprising a step of finishing and cleaning the top.   2. The method for cleaning a screen printing table according to claim 1, wherein the cleaning on the screen printing table and the finish cleaning are performed separately for each of the forward movements of the screen printing table or at a time. A method for cleaning a screen printing table.   3. The method for cleaning a screen printing table according to claim 1, wherein the roll wiper is made of a polyester fiber sheet, and the solvent is made of alcohol. A rectangular ceramic green sheet provided with a through hole is placed on a screen printing table that can freely reciprocate, and a conductive paste is applied to the wall surface of the through hole, or the ceramic green sheet filled in the through hole is applied to the screen. A screen printing table cleaning device for cleaning the screen printing table after removing it from the printing table,
A feeding roller for feeding a roll wiper made of a non-woven fabric having a width equal to or larger than the width of the ceramic green sheet with respect to the operating direction of the screen printing table, and a winding for winding the roll wiper above the feeding roller A cleaning roller provided by pressing the width direction of the roll wiper linearly from the back surface at a position between the roller and the upper surface of the screen printing table below the feeding roller, and the cleaning roller and the winding roller There is an auxiliary roller for preventing the contact with the feeding roller by pressing the width direction of the roll wiper linearly from the back surface, and a cleaning unit that can move up and down above the screen printing table is provided. And
The cleaning unit having the cleaning roller positioned immediately above the solvent-containing sponge body provided integrally with the screen printing table at a distance from the front of the screen printing table is lowered, and the sponge roller is moved to the sponge body by the cleaning roller. A mechanism for impregnating the solvent by contacting the roll wiper of the pressed portion;
The screen printing table starts to move forward while the cleaning unit is raised, the cleaning unit is lowered again, and the portion of the roll wiper pressed by the cleaning roller is placed on the upper surface of the front end of the screen printing table. The screen wiper starts cleaning with the roll wiper, and the screen printing table moves forward, and the upper surface of the screen printing table is cleaned with the roll wiper while being wetted with the solvent impregnating the roll wiper. When,
While the cleaning unit is raised, the screen printing table starts to return, the position of the front end of the screen printing table is moved to a position where the cleaning roller is directly above, and the winding roller is moved to the roll wiper. A mechanism for supplying a clean roll wiper to a portion of the roll wiper that is pressed by the cleaning roller;
The cleaning unit is lowered, the clean roll wiper that is not impregnated with the solvent in the portion pressed by the cleaning roller is brought into contact with the upper surface of the front end of the screen printing table, and finished with the roll wiper. A mechanism for starting cleaning and the screen printing table going forward, and finishing cleaning with the roll wiper while wiping off the solvent adhering to the upper surface of the screen printing table;
While the cleaning unit is raised, the screen printing table starts to operate again, the sponge body of the screen printing table is moved to a position where the cleaning roller is directly above, and the winding roller is moved to the roll wiper. A screen printing table cleaning device comprising: a mechanism for supplying a clean roll wiper to a portion of the roll wiper pressed by the cleaning roller. A rectangular ceramic green sheet provided with a through hole is placed on a screen printing table that can freely reciprocate, and a conductive paste is applied to the wall surface of the through hole, or the ceramic green sheet filled in the through hole is applied to the screen. A screen printing table cleaning device for cleaning the screen printing table after removing it from the printing table,
A feeding roller for feeding a roll wiper made of a nonwoven fabric having a width larger than the width of the ceramic green sheet with respect to the operating direction of the screen printing table, and a winding for winding the roll wiper above the feeding roller A portion when the width direction of the roll wiper is linearly pressed from the back surface in contact with the upper surface of the screen printing table at a position between the take-off roller and the upper surface of the screen printing table below the feeding roller. First and second cleaning rollers provided horizontally in parallel with each other, and the second cleaning roller following the first cleaning roller that presses the roll wiper fed from the feeding roller from the back surface. The width direction of the roll wiper is linearly pressed from the back surface between the winding roller and the take-up roller Wherein an auxiliary roller for preventing contact with the feed roller, comprising a cleaning unit to be freely vertically running at above the screen printing table Te,
The cleaning unit having the first cleaning roller located immediately above the solvent-containing sponge body provided integrally with the screen printing table at a distance from the front of the screen printing table is lowered, and the sponge body is moved to the sponge body. A mechanism for abutting the portion of the roll wiper being pressed by the first cleaning roller and impregnating the roll wiper with the solvent;
While the cleaning unit is raised, the screen printing table starts a forward operation, the cleaning unit is lowered again, and the portion of the roll wiper pressed by the first cleaning roller is moved forward of the screen printing table. A mechanism that abuts the upper surface of the end portion and starts cleaning with the roll wiper;
The screen printing table is operated in a state where the cleaning unit is lowered, and the upper surface of the screen printing table is wetted with the solvent impregnating the roll wiper in a portion pressed by the first cleaning roller. A clean roll wiper that is cleaned with a wiper and that is not impregnated with the solvent in a portion that is pressed by the second cleaning roller that follows the roll wiper in a portion that is pressed by the first cleaning roller And a mechanism for finishing cleaning while wiping off the solvent adhering to the upper surface of the screen printing table,
While the cleaning unit is raised, the screen printing table starts to return, moves the sponge body of the screen printing table to a position where the first cleaning roller is directly above, and the winding roller A screen printing table cleaning comprising: a mechanism for winding a predetermined amount of the roll wiper and supplying the clean roll wiper to the roll wiper in a portion pressed by the first and second cleaning rollers. apparatus.

Images