Abstract: It is an objective to provide a screen print system and a method for cleaning a mask of the screen print system that enable sufficient cleaning of the mask used for subjecting a cavity substrate to screen printing. A mask contact area R of a paper member 42 is brought into contact with a lower surface of one of convex portions 13t of a first mask 13a, thereby removing paste Pst adhering to the lower surface. Subsequently, the paper member 42 is winded up before the paper member 42 contacts the next convex portion 13t to be subjected to removal of the paste Pst, thereby updating the mask contact area R.

Abstract: It is an objective to provide a screen print system and a method for cleaning a mask of the screen print system that enable sufficient cleaning of the mask used for subjecting a cavity substrate to screen printing. A screen print system includes a first cleaning unit 16a and a second cleaning unit 16b. The first cleaning unit 16a sequentially brings a mask contact area R, which is formed by stretching a paper member 42 over an upper end of a nozzle part 41, into contact with lower surfaces of respective convex portions 13t of a first mask 13a, thereby removing paste Pst adhering to the respective lower surfaces of the respective convex portions 13t. The second cleaning unit 16b brings the mask contact area R, which is formed by stretching the paper member 42 over the upper end of the nozzle part 41, into contact with a lower surface of a second mask 13b, thereby removing the paste Pst adhering to the lower surface of the second mask 13b.

Abstract: It is an objective to provide a screen print system and a method for cleaning a mask of the screen print system that enable sufficient cleaning of the mask used for subjecting a cavity substrate to screen printing. A mask contact area R of a paper member 42 is brought into contact with a lower surface of one of convex portions 13t of a first mask 13a, thereby removing paste Pst adhering to the lower surface. Subsequently, the paper member 42 is winded up before the paper member 42 contacts the next convex portion 13t to be subjected to removal of the paste Pst, thereby updating the mask contact area R.

Abstract: It is an objective to provide a screen print system and a method for cleaning a mask of the screen print system that enable sufficient cleaning of the mask used for subjecting a cavity substrate to screen printing. A screen print system includes a first cleaning unit 16a and a second cleaning unit 16b. The first cleaning unit 16a sequentially brings a mask contact area R, which is formed by stretching a paper member 42 over an upper end of a nozzle part 41, into contact with lower surfaces of respective convex portions 13t of a first mask 13a, thereby removing paste Pst adhering to the respective lower surfaces of the respective convex portions 13t. The second cleaning unit 16b brings the mask contact area R, which is formed by stretching the paper member 42 over the upper end of the nozzle part 41, into contact with a lower surface of a second mask 13b, thereby removing the paste Pst adhering to the lower surface of the second mask 13b.

Abstract: Movable claws 13 are formed in clampers 10 holding a substrate 3 so that the movable claws can be selectively moved to a position where they have projected above the substrate 3, and to a position where they have retreated from above the substrate 3. Thereby, the safety of operation is ensured by causing the movable claws 13 to retreat during maintenance. Moreover, printing with high precision can be performed in a state where the surface of the substrate 3 and the rear face of the mask 2 are brought into surface contact with each other without any clearance by causing the movable claws 13 to retreat.

Abstract: A screen printing apparatus and a screen printing method facilitating to adjust a state of filling a paste. By adjusting a pneumatic pressure of pressing a squeezee 9a formed with a flexible region at at least a portion thereof to a surface of a mask 2, the squeezee 9a is moved up and down to follow recesses and projections of a surface of the mask 2 substantially in real time and an attack angle ? in sliding is maintained substantially constant. Thereby, a state of filling a paste can be stabilized without being influenced by recesses and projections of the surface of the mask 2 and promotion of a print quality can be expected. Further, bending is produced at the squeezee 9a by only adjusting the pneumatic pressure, and therefore, an attack angle ? in correspondence with a change in a print condition of a kind or a property of the paste, a thickness of the mask and the like can easily be changed.

Abstract: Movable claws 13 are formed in dampers 10 holding a substrate 3 so that the movable claws can be selectively moved to a position where they have projected above the substrate 3, and to a position where they have retreated from above the substrate 3. Thereby, the safety of operation is ensured by causing the movable claws 13 to retreat during maintenance. Moreover, printing with high precision can be performed in a state where the surface of the substrate 3 and the rear face of the mask 2 are brought into surface contact with each other without any clearance by causing the movable claws 13 to retreat.

Abstract: In a screen-printing apparatus for printing creamy solder paste on a substrate by attaching a screen mask to the substrate, a predetermined measuring position of the mechanisms in the screen-printing apparatus is measured three-dimensionally by a three-dimensional measuring device. Based on the measured result, a predetermined measuring point on an object to be measured is determined on a position relative to the origin of the mechanical coordinate system in the screen-printing apparatus, and the origin position on a control program can be set. As a result, machine adjusting operation and teaching operation in the screen-printing apparatus can be simplified with high accuracy.

Abstract: Cream solder stored in a squeegee head is pressurized by a pressurizing plate, and the squeegee head is slid on a mask plate, so that the cream solder is printed onto a substrate via pattern apertures. This is done by a screen printing apparatus, in which pressurized solder is accommodated, and the solder is brought into contact with a surface of the mask plate via an opening formed on a lower face of the cell. A rectifier is disposed in the cell for blocking the cream solder from flowing into a specific area just above the opening. This structure allows the solder to flow into the opening in a slant direction, and causes the solder to roll. This mechanism prevents the solder from being hardened due to staying stagnant just above the opening, and thus prevents defective printings.

Abstract: A screen-printing apparatus for printing creamy solder paste on a substrate by attaching a screen mask to the substrate. A laser-measuring device mounted in the apparatus measures the top surface of the screen mask at a printing position and the top of the substrate at a substrate-measurement position by three-dimensional measurement, and detects a shape of the substrate or the screen mask, and determines whether or not they are acceptable. After screen printing is completed, the substrate and the screen mask undergo a printing inspection where their shapes are inspected. This provides not only inspection data of the printing results but also data for identifying the causes of print failures. As a result, the screen-printing apparatus, which has high-printing accuracy and can prevent printing failures from occurring, is provided.

Abstract: Cream solder stored in a squeegee head is pressurized by a pressurizing plate, and the squeegee head is slid on a mask plate, so that the cream solder is printed onto a substrate via pattern apertures. This is done by a screen printing apparatus, in which pressurized solder is accommodated, and the solder is brought into contact with a surface of the mask plate via an opening formed on a lower face of the cell. A rectifier is disposed in the cell for blocking the cream solder from flowing into a specific area just above the opening. This structure allows the solder to flow into the opening in a slant direction, and causes the solder to roll. This mechanism prevents the solder from being hardened due to staying stagnant just above the opening, and thus prevents defective printings.

Abstract: It is possible to obtain a screen printing method that may assure excellent printing qualities since the screen printing method of the present invention includes: (A) sliding a squeegee head with paste stored in the squeegee head on a mask plate, while the past is pressurized, and printing the paste on a substrate through pattern holes of the mask plate, (B) at least one step of (b) separating the squeegee head with the paste stored therein from the mask plate, and (e) sliding the squeegee head on the mask plate for a pre-squeezing purpose before the step (A). The step of separating the squeegee head from the mask plate includes the steps of (1) discontinuing the pressure application to the paste stored in the squeegee head, (2) horizontally moving the squeegee head by a predetermined distance while the bottom end portion of the squeegee head is abutted on the mask plate in a state of the pressure application being discontinued, and (3) moving the squeegee head upward off from the mask plate.

Abstract: A screen-printing apparatus for printing creamy solder paste on a substrate by attaching a screen mask to the substrate. A laser-measuring device mounted in the apparatus measures the top surface of the screen mask at a printing position and the top of the substrate at a substrate-measurement position by three-dimensional measurement, and detects a shape of the substrate or the screen mask, and determines whether or not they are acceptable. After screen printing is completed, the substrate and the screen mask undergo a printing inspection where their shapes are inspected. This provides not only inspection data of the printing results but also data for identifying the causes of print failures. As a result, the screen-printing apparatus, which has high-printing accuracy and can prevent printing failures from occurring, is provided.

Abstract: Cream solder stored in a squeegee head is pressurized by a pressurizing plate, and the squeegee head is slid on a mask plate, so that the cream solder is printed onto a substrate via pattern apertures. This is done by a screen printing apparatus, in which pressurized solder is accommodated, and the solder is brought into contact with a surface of the mask plate via an opening formed on a lower face of the cell. A rectifier is disposed in the cell for blocking the cream solder from flowing into a specific area just above the opening. This structure allows the solder to flow into the opening in a slant direction, and causes the solder to roll. This mechanism prevents the solder from being hardened due to staying stagnant just above the opening, and thus prevents defective printings.

Abstract: It is possible to obtain a screen printing method that may assure excellent printing qualities since the screen printing method of the present invention includes: (A) sliding a squeegee head with paste stored in the squeegee head on a mask plate, while the past is pressurized, and printing the paste on a substrate through pattern holes of the mask plate, (B) at least one step of (b) separating the squeegee head with the paste stored therein from the mask plate, and (e) sliding the squeegee head on the mask plate for a pre-squeezing purpose before the step (A). The step of separating the squeegee head from the mask plate includes the steps of (1) discontinuing the pressure application to the paste stored in the squeegee head, (2) horizontally moving the squeegee head by a predetermined distance while the bottom end portion of the squeegee head is abutted on the mask plate in a state of the pressure application being discontinued, and (3) moving the squeegee head upward off from the mask plate.

Abstract: A screen printer for printing paste on a board by sliding a squeegee head on a mask plate. A pushing plate pressurizes solder paste in the squeegee head, and pressurized paste is led to a paste container from both outer parts in a printing width direction inward towards a printing center through a solder dispensing hole provided on both ends of the paste container. This configuration allows to print in accordance with the time-line supply sequence, regardless of the printing width of the board to be printed. This screen printer thus prevents the degradation and the consequent need for disposal of solder paste due to its retention in the squeegee head for long periods.

Abstract: It is possible to obtain a screen printing method that may assure excellent printing qualities since the screen printing method of the present invention includes: (A) sliding a squeegee head with paste stored in the squeegee head on a mask plate, while the past is pressurized, and printing the paste on a substrate through pattern holes of the mask plate, (B) at least one step of (b) separating the squeegee head with the paste stored therein from the mask plate, and (e) sliding the squeegee head on the mask plate for a pre-squeezing purpose before the step (A). The step of separating the squeegee head from the mask plate includes the steps of (1) discontinuing the pressure application to the paste stored in the squeegee head, (2) horizontally moving the squeegee head by a predetermined distance while the bottom end portion of the squeegee head is abutted on the mask plate in a state of the pressure application being discontinued, and (3) moving the squeegee head upward off from the mask plate.

Abstract: A screen printer for printing paste on a board by sliding a squeegee head on a mask plate. A pushing plate pressurizes solder paste in the squeegee head, and pressurized paste is led to a paste container from both outer parts in a printing width direction inward towards a printing center through a solder dispensing hole provided on both ends of the paste container. This configuration allows to print in accordance with the time-line supply sequence, regardless of the printing width of the board to be printed. This screen printer thus prevents the degradation and the consequent need for disposal of solder paste due to its retention in the squeegee head for long periods.

Abstract: Cream solder stored in a squeegee head is pressurized by a pressurizing plate, and the squeegee head is slid on a mask plate, so that the cream solder is printed onto a substrate via pattern apertures. This is done by a screen printing apparatus, in which pressurized solder is accommodated, and the solder is brought into contact with a surface of the mask plate via an opening formed on a lower face of the cell. A rectifier is disposed in the cell for blocking the cream solder from flowing into a specific area just above the opening. This structure allows the solder to flow into the opening in a slant direction, and causes the solder to roll. This mechanism prevents the solder from being hardened due to staying stagnant just above the opening, and thus prevents defective printings.

Abstract: A screen-printing apparatus for printing creamy solder paste on a substrate by attaching a screen mask to the substrate. A laser-measuring device mounted in the apparatus measures the top surface of the screen mask at a printing position and the top of the substrate at a substrate-measurement position by three-dimensional measurement, and detects a shape of the substrate or the screen mask, and determines whether or not they are acceptable. After screen printing is completed, the substrate and the screen mask undergo a printing inspection where their shapes are inspected. This provides not only inspection data of the printing results but also data for identifying the causes of print failures. As a result, the screen-printing apparatus, which has high-printing accuracy and can prevent printing failures from occurring, is provided.