CN114728518A

CN114728518A - Screen printing apparatus and screen printing method

Info

Publication number: CN114728518A
Application number: CN201980102717.8A
Authority: CN
Inventors: 小岛一夫
Original assignee: Micro Tec Co Ltd
Current assignee: Micro Tec Co Ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2022-07-08
Also published as: TW202122276A; JPWO2021111500A1; WO2021111500A1

Abstract

A screen printing device (100) is provided with: a movable table (150) which has a plurality of workpiece carrying parts (30) with a table shaft (156) as the center and rotates with the table shaft (156) as the center; a printing unit (60) that prints on the workpieces (69) mounted on the plurality of workpiece mounting units (30) from the inside toward the outside in the radial direction; and a control unit (110) for rotating the movable table (150) in the forward direction and the reverse direction and executing printing by the printing unit (60). The control unit (110) simultaneously starts the carrying-out of the workpiece (69) by the workpiece mounting unit (30) and the printing on the workpiece (69) by the printing unit (60) after the rotation of the movable table (150).

Description

Screen printing apparatus and screen printing method

Technical Field

The present invention relates to, for example, a screen printing apparatus, a belt driving apparatus, and methods thereof.

Background

Conventionally, an apparatus for printing by placing a workpiece on an endless belt has been considered.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 10-175289

Patent document 2: japanese patent laid-open publication No. 2017-213737.

Disclosure of Invention

Problems to be solved by the invention

The invention provides a screen printing apparatus and a screen printing method with improved printing accuracy.

Means for solving the problems

A screen printing apparatus of the present invention includes: a movable table having a plurality of workpiece mounting sections centered on a table axis and rotating about the table axis; a printing unit configured to print the work mounted on the plurality of work mounting units from the inside toward the outside in the radial direction; and a control unit for rotating the movable table in the forward direction and the reverse direction and executing printing by the printing unit.

Effects of the invention

According to the present invention, since the printing is performed in the radial direction, no rotational force acts on the table shaft, and the printing accuracy is improved.

Drawings

Fig. 1 is a front view configuration diagram of a screen printing apparatus 100 according to embodiment 1.

Fig. 2 is an AA sectional view of the screen printing apparatus 100 according to embodiment 1.

Fig. 3 is a front view configuration diagram of the base 50 and the movable table 150 according to embodiment 1.

Fig. 4 is an AA sectional view of the base 50 and the movable table 150 according to embodiment 1.

Fig. 5 is a configuration diagram of a removing section 90 of a screen printing apparatus 100 according to embodiment 1. Fig. 5 (a) is a front view, and fig. 5 (b) is a BB cross-sectional view.

Fig. 6 is a flowchart of the screen printing method of embodiment 1.

Fig. 7 is a front view configuration diagram of the screen printing apparatus 100 according to embodiment 2.

Fig. 8 is a schematic configuration diagram of the belt moving mechanism 40 and the driving mechanism 70 according to embodiment 3. Fig. 8 (a) is a view in which the drive roller 73 is fixed to the rotating shaft of the motor 71, fig. 8 (b) is a view in which the transfer roller 46 is fixed to the rotating shaft of the belt roller 42, and fig. 8 (c) is a view in which the drive roller 73 is fixed to the rotating shaft of the motor 71 and the transfer roller 46 is fixed to the rotating shaft of the belt roller 42.

Fig. 9 is a schematic configuration diagram of the driving unit 170 and the position moving unit 180 according to embodiment 4. Fig. 9 (a) is a structural diagram of the driving unit 170 and the position moving unit 180, and fig. 9 (b) is a structural diagram of the driving unit 170 and the position moving unit 180.

Fig. 10 is a front view configuration diagram of a screen printing apparatus 100 according to embodiment 5.

Fig. 11 is an AA sectional view of the screen printing apparatus 100 of embodiment 5.

Fig. 12 is a front view of base 50 and movable table 150 according to embodiment 5.

Fig. 13 is an AA sectional view of the base 50 and the movable table 150 according to embodiment 5.

Fig. 14 is a schematic configuration diagram of the driving unit 170 and the position moving unit 180 according to embodiment 6.

Fig. 15 is a front view of the base 50 and the movable table 150 according to embodiment 7.

Fig. 16 is an AA sectional view of the base 50 and the movable table 150 according to embodiment 7.

Fig. 17 is a flowchart of a screen printing method of embodiment 8.

Fig. 18 is a configuration diagram of a hot air supply unit 300 of the screen printing apparatus 100 according to embodiment 1. Fig. 18 (a) is a front view, and fig. 18 (b) is a BB cross-sectional view.

Fig. 19 is a configuration diagram of the upper surface of a hot air blower 303 of the screen printing apparatus 100 according to embodiment 1. FIG. 19 (a) is a cross-shaped view, and FIG. 19 (b) is a box-shaped view.

Detailed Description

Embodiment 1.

Description of the structure

The configuration of the screen printing apparatus 100 using the belt driving apparatus 200 will be described based on fig. 1 to 5.

The screen printing apparatus 100 of fig. 1 to 5 is an apparatus for screen printing by screen plate making with a workpiece 69 placed on an endless belt 41.

The tape drive device 200 includes a tape moving mechanism 40, a drive mechanism 70, and a control unit 110, which are described below.

In fig. 1, the direction in which the endless belt 41 is moved left and right is referred to as a left-right transverse direction. The height direction is referred to as the vertical direction.

In fig. 2, the lower side of the drawing sheet is referred to as the front side, and the upper side of the drawing sheet is referred to as the rear side. The printing direction is the front-back direction.

< workpiece 69>

The workpiece 69 is a rectangular flat plate. Specific examples of the material of the work 69 are glass, resin, plastic, paper, cloth, and metal.

< < control unit 110>

The screen printing apparatus 100 has a control section 110.

The control unit 110 controls the entire apparatus.

The control unit 110 may be realized by a central processing unit, a program, and a memory. The memory has a first memory and a second memory. The signal from the control unit 110 is transmitted to each unit described below via the signal line 111. The following operations can be realized by the control unit 110 transmitting a command through the signal line 111.

< abutment 50 >)

The screen printing apparatus 100 has a base 50.

The base 50 houses a control unit 110 and a signal line 111, and also houses driving devices such as a power supply device, a pump device, an electric cylinder (not shown), a linear guide, and the suction unit 96.

The base 50 has four upper and lower columns 51. The upper and lower columns 51 are moved up and down by a cylinder (cylinder) located inside the base 50. Two beam frames 52 are fixed to the upper and lower columns 51 in the front-rear direction.

On the left side of the base 50, there is a carrying-in device 155 for carrying in the workpiece 69, and on the right side of the base 50, there is a carrying-out device 157 for carrying out the workpiece 69.

< < Mobile workbench 150 >)

The movable table 150 has a plurality of workpiece mounting sections 30 centered on a table (table) axis 156, and rotates about the table axis 156.

As shown in fig. 3 and 4, a bottom plate 153 of the movable table 150 is rotatably attached to the center of the base 50 via a table shaft 156. The movable table 150 is a rotary table that rotates under the control of the control unit 110.

The table surface 151 of the moving table 150 is in the same plane as the upper surface of the endless belt 41.

The front and rear of the movable table 150 are cut out in an コ shape in plan view, and two workpiece mounting portions 30 are disposed in the cut-out portions. The two workpiece mounting portions 30 are arranged on a straight line with the table shaft 156 as the center.

Hereinafter, one of the two workpiece mounting portions 30 is referred to as a first workpiece mounting portion 30, and the other is referred to as a second workpiece mounting portion 30.

The belt moving mechanism 40 is disposed in the workpiece mounting portion 30.

The movable table 150 has an installation portion 152 at the center of the table top 151. The setting portion 152 is a rectangular portion that is lowered by one step from the work table 151. The installation portion 152 is provided with a rectangular fixing plate 99 orthogonal to the installation portion 152 in the front-rear direction.

The fixing plate 99 is a member such as a shoulder pole attached in a state where the belt moving mechanism 40 is suspended on both sides. However, the fixing plate 99 is not deformed and does not vertically move the position of the belt moving mechanism 40.

Suction portions 55 are provided on both sides of the upper surface of the fixing plate 99. In the suction portion 55, a plurality of suction grooves 57 are arranged. A suction pipe 56 is connected to the rear of the suction portion 55.

The fixing plate 99 has a fixing tool 58 fixed downward. The fixture 58 is a flat, thick plate orthogonal to the fixture plate 99. The fixture 58 has an F-shape elongated in front view, and has bearings at both ends for receiving the rotary shaft. Further, two arms extending downward are provided, and bearings for receiving the rotary shafts are provided at the tips of the two arms.

The fixing tools 58 are fixed to the total of four positions on both sides of the setting portion 152 and both ends of the fixing plate 99. The pair of fixing tools 58 are disposed in parallel on both sides of the below-described belt moving mechanism 40, and the belt moving mechanism 40 is attached to the moving table 150. Specifically, the fixture 58 is a member that rotatably holds the rotation shafts of the various rollers of the belt moving mechanism 40.

The fixture 58 includes a micrometer (micrometer) 158 and a guide 159, and the horizontal position of the rotation axis of the roller of the belt moving mechanism 40 can be adjusted by adjusting the micrometer 158.

< Belt moving mechanism 40 >)

The screen printing apparatus 100 has a belt moving mechanism 40.

The belt moving mechanism 40 has an endless belt 41, and circulates the endless belt 41.

The tape moving mechanism 40 is attached to the base 50 so as to be rotatable via a moving table 150.

The two belt moving mechanisms 40 are provided on the base 50, and the endless belt 41 is attached to the base in a circulating manner.

The height of the upper outer surface of the endless belt 41 is the same as the height of the surface of the moving table 150.

The belt moving mechanism 40 is disposed inside the outer periphery of the moving table 150. Therefore, even if the moving table 150 rotates, the tape moving mechanism 40 does not contact the base 50.

The belt moving mechanism 40 and the moving table 150 have no component at a position higher than the upper outer surface of the endless belt 41.

On the right side of the belt moving mechanism 40, there is a belt roller 42, and on the left side, there is a belt roller 43.

The

belt rollers

42 and 43 have the same radius, which is 30mm to 50mm, preferably 40 mm.

The belt roller 42 and the belt roller 43 are rotatably fixed to the fixing plate 99 of the movable table 150 by the fixing tool 58. The spacing of the

belt rollers

42 and 43 can be adjusted by adjusting the micrometer 158.

A pulley (pulley) 44 is fixed to the rotation shaft of the belt roller 42, and the belt roller 42 rotates by the rotation of the pulley 44.

The belt roller 43 has a pulley 45 fixed to a rotation shaft thereof, and the belt roller 43 rotates by the rotation of the pulley 45.

The belt moving mechanism 40 has a transfer roller 46.

The transfer roller 46 is rotatably fixed to the fixing plate 99 of the movable table 150 by a fixing tool 58.

The transmission roller 46 has a pulley 47 on a side, and the pulley 47 rotates by the rotation of the transmission roller 46.

A transmission belt 49 is hung on the pulley 47 and the pulley 44.

< printing section 60 >)

The screen printing apparatus 100 has a printing section 60.

The printing unit 60 is disposed above the endless belt 41 that rotates.

The printing unit 60 prints the workpiece 69 held on the surface of the endless belt 41 with ink.

As shown in fig. 1, the printing unit 60 is disposed between two beam frames 52.

The printing unit 60 slides via an electric cylinder housed in the beam 52. That is, the printing unit 60 is attached to the beam frame 52 so as to be movable in the front-rear transverse direction.

The printing unit 60 includes a printing mechanism 61 and a printing blade (squeegee) 62.

A printing blade 62 is attached to a central lower portion of the printing mechanism 61.

Below the printing squeegee 62 there is a screen plate 63.

The screen plate 63 is detachably attached to the printing mechanism 61 by a mounting mechanism 64.

< Driving mechanism 70>

The screen printing apparatus 100 includes a drive mechanism 70 that circulates the endless belt 41.

The drive mechanism 70 is attached to the base 50 so as to be connectable to the belt moving mechanism 40.

The control unit 110 controls the connection between the belt moving mechanism 40 and the driving mechanism 70.

The driving mechanism 70 is present at a lower portion of the belt moving mechanism 40.

The driving mechanism 70 generates a driving force for circulating the endless belt 41.

The drive mechanism 70 has a drive section 170 and a position shift section 180.

< Driving section 170 of Driving mechanism 70 >)

The driving unit 170 includes a motor 71, a driving roller 73, and a movable base 77.

The motor 71 is fixed to the movable base 77, and the drive roller 73 and the tension pulley 75 are rotatably attached.

A pulley 72 is fixed to the rotation shaft of the motor 71.

A pulley 74 is fixed to the drive roller 73 at the rotation axis.

A transmission belt 76 is hung on the

pulleys

72 and 74.

The tension pulley 75 can be fixed to the movable base 77 so as to be laterally displaced, and applies tension to the transmission belt 76.

< position moving section 180 of drive mechanism 70 >)

The position moving unit 180 holds the driving unit 170 so as to be able to swing, and moves the position of the driving unit 170.

The position moving unit 180 includes a fixed post 83 and a fixed post 84 fixed to the base 50.

An upper cylinder 81 and a lower cylinder 81 are mounted on the fixed column 83.

Upper and lower pins 82 are vertically movably attached to the upper and lower cylinders 81.

The upper portion of the upper and lower pins 82 is connected to the lower end of the moving seat 77.

The movable base 77 is swingably mounted with respect to the fixed post 84 via a rotating shaft 85.

The controller 110 controls the up-down cylinder 81 to move the up-down pin 82 up and down, thereby swinging the movable base 77 left and right about the rotation shaft 85.

< carriage position adjustment part 65 >)

The chase control section 67 is explained with reference to fig. 1.

The chase controlling section 67 has a camera 66 and a chase position adjusting section 65.

The camera 66 is fixed to the base 50 by a fixing portion not shown.

The camera 66 is disposed above the workpiece mounting unit 30.

The camera 66 photographs the printed workpiece 69 mounted on the workpiece mounting unit 30.

The photographed image is analyzed by the control unit 110.

The control unit 110 detects a print position deviation of the print pattern from the photographed image, and stores the amount of the position deviation in the memory.

The control unit 110 stores in the first memory the amount of positional deviation obtained from the image of the workpiece 69 on the first workpiece mounting unit 30.

The control unit 110 stores the amount of positional deviation obtained from the image of the workpiece 69 on the second workpiece mounting unit 30 in the second memory.

The chase position adjusting unit 65 is fixed to the mounting mechanism 64.

The frame position adjusting unit 65 fixes the frame of the screen plate 63.

The frame position adjusting portion 65 adjusts the setting position of the screen plate 63.

The chase position adjusting unit 65 includes, for example, an X-axis motor and two Y-axis motors, and can adjust the position in the three-dimensional direction of XY θ with respect to the horizontal direction.

The frame position adjusting section 65 adjusts the setting position of the screen plate 63 based on the amount of positional deviation transmitted from the control section 110 so as to eliminate the printing positional deviation of the print pattern with respect to the workpiece 69.

< removal part 90>, a method for producing a semiconductor device, and a semiconductor device

The removal portion 90 will be described with reference to fig. 5.

The removal portion 90 is disposed below the endless belt 41.

The removing portion 90 is attached to a lower portion of the endless belt 41 so as to be movable in the vertical direction.

The removing portion 90 removes the ink 68 adhering to the endless belt 41 while the endless belt 41 is circulating.

The removing section 90 includes a scraping blade 91, an adhesive roller section 910, and a solvent roller section 920.

The upper end of the scraping blade 91 is present over the entire width of the endless belt 41.

The scraping blade 91 is in contact with the curved surface of the end of the endless belt 41, and scrapes off the ink 68 and foreign matter adhering to the endless belt 41.

The removing portion 90 has two receiving rollers 98.

As shown in fig. 2, the two receiving rollers 98 are rotatably fixed to a fixing plate 99 of the movable table 150 by a fixing tool 58.

The receiving roller 98 is positioned directly above the adhesive roller portion 910 and the solvent roller portion 920, and rotates in contact with the inner surface of the endless belt 41.

The adhesion roller portion 910 has four adhesion rollers 916.

Four adhesive rollers 916 are configured in a cross-shape configured in a gatling (gagling) form.

The four adhesive rollers 916 are rotatably mounted around a rotation shaft 917.

Each of the adhesive rollers 916 is rotatably mounted around a roller shaft 918.

An adhesive tape having an adhesive surface on the outer side is wound around the adhesive roll 916.

The adhesion roller 916 is present over the entire width direction of the endless belt 41.

The holding portion 911 is swingably attached to the base portion 914 via a rotation shaft 912.

The rotary shaft 912 is rotatably attached to the adhesive roller 916.

The springs 913 are disposed on both sides of the lower end of the holding portion 911.

Springs 913 are provided on both sides of the rotating shaft 912 to align the adhesion roller 916 with the endless belt.

The adhesion roller 916 rotates in contact with the outer surface of the endless belt 41, and adheres and removes the ink 68 and the foreign matter adhering to the outer surface of the endless belt 41.

In the case where the adhesion force of the first adhesion roller 916 is reduced, the second adhesion roller 916 is used by rotating the four adhesion rollers 916 by 90 degrees around the rotation axis 917. Further, the first adhesive roller 916 is rotated around the roller shaft 918 to cut the adhesive tape with reduced adhesive force and expose a new adhesive tape.

The same applies to the case where the second, third, and fourth adhesive rollers 916 have reduced adhesive force.

These actions may be performed either automatically or manually.

The solvent roller portion 920 includes a single solvent roller 926 and a solvent reservoir 927.

The solvent roller 926 is rotatably installed.

The solvent roller 926 exists over the entire width of the endless belt 41.

The solvent reservoir 927 stores a solvent for dissolving the ink.

The lower portion of the solvent roller 926 is immersed in the solvent reservoir 927.

The holding portion 921 is swingably attached to the base portion 924 via a rotation shaft 922.

The rotation shaft 922 rotatably mounts the solvent roller 926.

The springs 923 are disposed on both sides of the lower end of the holding section 921.

Springs 923 are positioned on opposite sides of the rotary shaft 922 to align the solvent roll 926 with the endless belt.

The upper portion of the solvent roller 926 rotates in contact with the outer surface of the endless belt 41, and supplies a solvent to the ink 68 adhering to the outer surface of the endless belt 41.

The ink 68 becomes soft by the solvent and becomes easily adhered by the adhesion roller 916.

The removing section 90 has a cylinder 94 fixed to the base 50.

The cylinder 94 has a pin 95 that moves up and down.

The vertical portion 97 is fixed to the pin 95, and the vertical portion 97 moves vertically by the vertical movement of the pin 95, and as a result, the scraping blade 91, the adhesive roller portion 910, and the solvent roller portion 920 move vertically.

< Hot air supply Unit 300 >)

The hot air supply unit 300 will be described with reference to fig. 1, 2, and 18.

As shown in fig. 1 and 2, the hot air supply unit 300 is disposed below the printing unit 60 and the workpiece mounting unit 30.

The hot air supply unit 300 is fixed to the base 50.

The hot air supply unit 300 includes a hot air blower 301, a duct 302, a hot air blower 303, upper and lower pins 304, and upper and lower cylinders 305.

The hot air blower 301 includes a heater and a blower, and generates hot air 306.

Duct 302 is a blast duct that carries hot air 306.

The hot air blower 303 blows hot air 306 to the endless belt 41.

As shown in fig. 18, the hot air blowout device 303 has a plurality of blowout holes 307.

As shown in fig. 19 (a), the hot air blower 303 is constituted by a hollow pipe in a cross shape formed by a plurality of rows and a plurality of columns.

As shown in fig. 19 (b), the hot air blower 303 may be hollow and box-shaped.

The upper and lower cylinders 305 are fixed to the base 50.

The upper and lower cylinders 305 are provided with upper and lower pins 304 vertically movable.

The upper portion of the upper and lower pins 304 is fixed to the lower end of the hot air blower 303.

The controller 110 controls the up-down cylinder 305 to move the up-down pin 304 up and down, thereby moving the hot air blower 303 up and down.

When the moving table 150 rotates, the controller 110 moves the hot air blower 303 downward so as not to hinder the rotation.

The controller 110 moves the hot air blower 303 upward during printing.

The controller 110 blows hot air from the hot air blower 303 onto the lower surface of the endless belt 41 during printing, and heats the ink 68 to prevent the ink 68 from being solidified when the ink 68 is present on the lower surface of the endless belt 41.

Since the ink 68 is not solidified by the hot air supply unit 300, the removal unit 90 can easily remove the ink 68.

< endless Belt 41 >)

The structure of the endless belt 41 will be described with reference to fig. 5.

The endless belt 41 is made of a thin plate of metal such as stainless steel, aluminum, or an alloy.

The outer surface of the annular belt 41 is coated with fluororesin.

V-shaped guide bodies 411 are formed on the inner peripheries of both sides of the endless belt 41.

The V-shaped guide 411 is a protrusion having a trapezoidal or triangular cross section and protruding from the inner circumferential surface of the annular belt 41.

In the case of the trapezoidal V-shaped guide 411, the height is 3mm to 7mm, preferably 5 mm.

In the case of the trapezoidal V-shaped guide body 411, the width of the bottom side is 3mm to 7mm, preferably 5 mm.

In the case of the trapezoidal V-shaped guide 411, the upper side has a width of 2mm to 4mm, preferably 3 mm.

V-grooves 421 are formed on the outer peripheries of both sides of the

belt rollers

42 and 43.

The V-groove 421 has a shape capable of receiving the V-shaped guide 411.

The V-shaped guide 411 is fitted into the V-groove 421 so that the endless belt 41 does not come off.

The endless belt 41 has a plurality of through holes 48 arranged in a longitudinal direction.

The through hole 48 is a cylindrical hole extending from the outer surface to the inner surface of the endless belt 41, and preferably has a diameter of 0.5mm to 1.0mm, more preferably 0.7 mm.

The through holes 48 are regularly arranged in a horizontal direction at intervals of 10mm to 15mm, preferably at intervals of 13 mm.

The through-hole 48 is formed over the entire surface of the endless belt 41 except for the edge portion of the V-shaped guide 411.

< < suction section 55>

The structure of the suction portion 55 is explained with reference to fig. 5.

The suction portion 55 has a plurality of suction grooves 57 and a plurality of pushing surfaces 59.

The plurality of suction grooves 57 and the plurality of pressing surfaces 59 are alternately arranged in parallel.

The suction groove 57 is a groove extending in the left-right direction, and communicates with the suction pipe 56.

The suction grooves 57 are formed right below the through holes 48 aligned in the left-right direction.

The pressing surface 59 is a flat surface contacting the inner surface of the endless belt 41.

The length of the suction groove 57 in the left-right direction is shorter than the length of the workpiece 69 in the left-right direction.

The distance between the two suction grooves 57 located at both ends in the front-rear direction of the plurality of suction grooves 57 is shorter than the length in the front-rear direction of the workpiece 69.

That is, the suction groove 57 is present inside the outer shape of the workpiece 69, and the suction groove 57 is not exposed outside the workpiece 69.

Description of actions

A screen printing method of the screen printing apparatus 100 will be described with reference to fig. 6.

Further, in steps S15 to S18, a tape driving method of the tape driving device 200 is explained.

The following operations are executed by the control unit 110 provided in the screen printing apparatus 100.

The screen printing apparatus 100 includes two belt moving mechanisms 40, and the left side of fig. 6 shows the operation of one belt moving mechanism 40, and the right side of fig. 6 shows the operation of the other belt moving mechanism 40. The two belt moving mechanisms 40 are operated in the same manner, with different operation timings.

First, a case of the first workpiece mounting section 30, that is, a case of the one-belt moving mechanism 40 on the left side of fig. 6 will be described.

First, when the power is turned on, the control unit 110 lowers the driving unit 170 and lowers the removing unit 90 via the position moving unit 180, and moves the squeegee 62 forward to position the squeegee 62 at the printing start position. At the time of power-on, the amount of positional deviation between the first memory and the second memory is 0.

Step S11 a: work setting and suction starting process

The workpiece 69 is placed on the endless belt 41 at the first workpiece mounting portion 30 by a workpiece carrying-in mechanism not shown. The workpiece 69 is carried in from left to right as shown in fig. 2. The position of the workpiece 69 is predetermined, and the workpiece 69 is accurately positioned and placed on the endless belt 41 by the workpiece carrying-in mechanism.

The control section 110 starts suction by the suction section 55 by means of the suction device 96. Since the suction unit 55 sucks air from the through-holes 48 disposed in the suction groove 57, the workpiece 69 is closely attached to the outer surface of the endless belt 41, and the workpiece 69 placed on the endless belt 41 is fixed to the endless belt 41 without positional deviation. Since the suction unit 55 has the pressing surface 59 in close contact with the inner surface of the endless belt 41, the endless belt 41 is not deformed downward by suction.

Step S12: table rotation process (forward rotation) and chase position adjustment process

At time T1, control unit 110 rotates movable table 150 in the forward direction by 180 degrees. Since the belt moving mechanism 40 and the suction unit 55 rotate together, the workpiece 69 is closely attached to the outer surface of the endless belt 41 and does not undergo positional deviation due to the rotation.

At time T1, the control unit 110 operates the chase position adjustment unit 65 based on the amount of positional deviation stored in the first memory.

The control unit 110 transmits the positive and negative values of the positional deviation amounts in the X-axis direction (left-right direction) and the Y-axis direction (front-rear direction) stored in the first memory to the chase position adjustment unit 65.

The reason why the control unit 110 sends the positive and negative values of the positional deviation amounts in the X-axis direction and the Y-axis direction stored in the first memory to the chase position adjustment unit 65 is that the printing position and the imaging position are symmetrical with respect to the table axis 156 by 180 degrees.

For example, when the amount of positional deviation is + 1mm in the X-axis direction (for example, leftward), the control section 110 instructs to shift the position of the screen plate 63 by + 1mm in the X-axis direction (for example, leftward).

The control section 110 instructs to shift the position of the screen plate 63 by + 1mm in the Y-axis direction (e.g., forward) in the case where the positional deviation amount is + 1mm in the Y-axis direction (e.g., forward).

The control unit 110 transmits, to the chase position adjustment unit 65, a value obtained by inverting the positive and negative values of the value of the amount of positional deviation in the θ -axis direction (rotation direction) stored in the first memory.

When the amount of positional deviation is + 1 degree in the θ -axis direction, the control section 110 instructs to rotate the position of the screen plate 63 by-1 degree in the axial direction.

Step S13 a: printing process and hot air supply process

When the movable table 150 moves the workpiece 69, the control unit 110 lowers the upper and lower columns 51 at time T1, and the printing unit 60 performs printing.

The control unit 110 performs printing while moving the printing blade 62 from the front to the rear.

The control section 110 moves the printing blade 62 from the printing start position to the printing end position.

The control unit 110 performs printing while moving the printing blade 62 from the inside to the outside in the radial direction around the table shaft 156.

The control unit 110 performs printing while moving the printing blade 62 in a direction orthogonal to the rotation direction of the moving table 150.

The control unit 110 performs printing while moving the printing blade 62 in a direction orthogonal to a tangent line of the outer circumference of the moving table 150.

Since the squeegee 62 moves in the radial direction, the movement of the squeegee 62 does not apply a force to rotate the movable table 150. That is, the movable table 150 does not rotate during printing. Since the printing is performed in the radial direction, no rotational force acts on the table shaft, and the printing accuracy is improved.

Since printing starts from the inside in the radial direction, the moment of the force that tilts the table shaft 156 at the start of printing is smaller than that at the start of printing from the outside in the radial direction.

Since the height of the upper outer surface of the endless belt 41 is the same as the height of the surface of the movable table 150, the movable table 150 does not interfere with printing.

For example, the printing unit 60 is a member that performs so-called full-coat printing in which ink 68 is applied to the entire surface of the workpiece 69.

In the case of full-coat printing, the ink 68 may drip around the workpiece 69.

Since the suction portion 55 sucks only the inner side of the outer periphery of the back surface of the workpiece 69, the suction portion 55 does not suck the ink 68 dropped around the workpiece 69.

When the movable table 150 carries the workpiece 69, at time T2, the controller 110 supplies the hot air 306 from the hot air blower 301 to the duct 302, raises the hot air blower 303, and blows the hot air during printing.

When printing is completed, the control unit 110 raises the upper and lower columns 51 and raises the printing unit 60. The control unit 110 stops the supply of the hot air and lowers the hot air blower 303.

Step S19 a: scraper movement

The control unit 110 moves the printing blade 62 from the printing end position to the printing start position after raising the printing unit 60.

That is, the control unit 110 moves the squeegee 62 from the rear to the front, and positions the squeegee 62 at the printing start position.

Step S14: working table rotating procedure (reverse rotation) and chase position adjusting procedure

At time T3, control unit 110 rotates movable table 150 in the reverse direction by 180 degrees.

The control unit 110 operates the chase position adjustment unit 65 based on the amount of positional deviation stored in the second memory, using the same value as in the chase position adjustment process described in step S12.

The reason why the first workpiece mounting portion 30 is associated with the amount of positional deviation of the first memory and the second workpiece mounting portion 30 is associated with the amount of positional deviation of the second memory is because there is a possibility that there is a difference between the positioning error of the positioning by the forward rotation and the positioning by the reverse rotation.

That is, the control unit 110 uses the amount of positional deviation due to the forward rotational registration for the positional adjustment of printing by the forward rotational registration and uses the amount of positional deviation due to the reverse rotational registration for the positional adjustment of printing by the reverse rotational registration, and therefore, the registration errors due to the forward rotation and the reverse rotation can be ignored.

Step S15 a: imaging process and belt circulation starting process

At time T4, the control unit 110 captures the workpiece 69 of the first workpiece mounting unit 30 by the camera 66. The control unit 110 calculates a positional deviation amount from the image of the workpiece 69 of the first workpiece mounting unit 30, and stores the positional deviation amount in the first memory.

After the image pickup, the control unit 110 starts the circulation of the endless belt 41 as follows.

The control unit 110 starts the counterclockwise rotation of the motor 71 to push up the upper and lower pins 82 of the upper and lower cylinders 81.

The movable base 77 rotates counterclockwise about the rotation shaft 85 by the upward movement of the upper and lower pins 82. If the movable seat 77 is rotated counterclockwise, the outer periphery of the driving roller 73 comes into contact with the outer periphery of the transfer roller 46. In this way, the control unit 110 couples the belt moving mechanism 40 and the driving mechanism 70. Here, the connection means a state in which the outer periphery of the drive roller 73 is in contact with the outer periphery of the transmission roller 46 and the transmission roller 46 is rotated by the rotation of the drive roller 73.

The counterclockwise rotation of the motor 71 rotates the pulley 72, and the rotation of the pulley 72 rotates the pulley 74 via the transmission belt 76. The driving roller 73 is rotated counterclockwise by the rotation of the pulley 74.

The counterclockwise rotation of the drive roller 73 rotates the transmission roller 46, and the rotation of the transmission roller 46 rotates the pulley 47. The rotation of the pulley 47 rotates the pulley 44 via the transmission belt 49. The belt roller 42 rotates clockwise by the rotation of the pulley 44. The endless belt 41 is circulated clockwise by the rotation of the belt roller 42.

If the motor 71 rotates counterclockwise, the endless belt 41 moves rightward and the workpiece 69 moves rightward.

Step S16 a: suction stop and work piece carry-out process

The control unit 110 continues the belt circulation until the workpiece 69 is carried out rightward, and stops the suction by the suction unit 55 when the workpiece 69 is carried out rightward. After the work 69 is carried out, the ink 68 that has dropped on the outer peripheral portion where the work 69 is disposed may remain on the surface of the endless belt 41.

Step S17 a: ink removing step

After the workpiece 69 is carried out, the control unit 110 continues the belt circulation further.

The control unit 110 raises the pin 95 of the cylinder 94, brings the adhesive roller 916 and the solvent roller 926 close to the lower outer surface of the endless belt 41, and brings the scraping blade 91 into contact with the curved surface of the endless belt 41.

First, the scraping blade 91 scrapes the ink 68 remaining on the surface of the endless belt 41.

The solvent roller 926 supplies a solvent while applying pressure to the ink 68 remaining on the surface of the endless belt 41.

The adhesion roller 916 removes the ink 68 remaining on the surface of the endless belt 41 by the adhesive force, and takes out the ink 68 in the through hole 48.

Since the endless belt 41 is sandwiched between the adhesive roller 916, the solvent roller 926, and the two receiving rollers 98, the endless belt 41 is not deformed upward even if an increased pressure acts on the adhesive roller 916 and the solvent roller 926.

Further, the spring force of the two springs 913 is the same, the adhesion roller 916 is held horizontal, and the adhesion roller 916 is in uniform contact with the endless belt 41 in the front-rear direction.

Even when the adhesive roller 916 does not come into uniform contact with the adhesive roller 916 at the time of rising of the adhesive roller 916, the adhesive roller 916 can be rotated by the rotation shaft 912 and pushed up to the left and right by the spring 913, so that the adhesive roller 916 can be brought into close contact with the endless belt 41 in the entire front-rear direction by the rising pressure applied to the adhesive roller 916.

The solvent roller 926 is also in close contact with the endless belt 41 in the front-rear direction as in the case of the adhesive roller 916.

Step S18 a: with circulation stop process

After removing the ink 68, the control unit 110 lowers the pin 95 of the cylinder 94, and ends the ink removal operation.

Further, the upper and lower pins 82 of the upper and lower cylinders 81 are lowered to release the connection between the driving roller 73 and the transmission roller 46, thereby driving the tether moving mechanism 40.

Then, the workpiece 69 is set, and a new printing is started.

Next, a case of the second workpiece mounting section 30, that is, a case of the other belt moving mechanism 40 on the right side in fig. 6 will be described.

Step S19 b: scraper movement

After the power is turned on, the control unit 110 moves the printing blade 62 forward to move the printing blade 62 from the printing end position to the printing start position after the printing unit 60 is raised.

At time T1, control unit 110 rotates movable table 150 in the forward direction by 180 degrees.

As described above, the control unit 110 operates the chase position adjustment unit 65 using the amount of positional deviation stored in the first memory.

Step S15 b: tape cycle Start Process

After the rotation of the movable table 150, the control unit 110 simultaneously starts the carrying out of the workpiece 69 by the workpiece mounting unit 30 and the printing on the workpiece 69 by the printing unit 60.

At time T2, the control unit 110 captures the workpiece 69 of the second workpiece mounting unit 30 by the camera 66. The control unit 110 calculates a positional deviation amount from the image of the workpiece 69 of the second workpiece mounting unit 30, and stores the positional deviation amount in the second memory.

After the image pickup, the control unit 110 starts the belt cycle start step.

The operation of the tape circulation starting step of step S15b is the same as the operation of the tape circulation starting step of step S15 a.

Step S16 b: suction stop and work piece carry-out process

The operation of the suction stop and work carrying-out step in step S16b is the same as the operation of the suction stop and work carrying-out step in step S16 a.

Step S17 b: ink removing step

The operation of the ink removal process of step S17b is the same as that of step S17 a.

Step S18 b: with circulation stop process

The operation of the tape circulation stopping step of step S18b is the same as the operation of the tape circulation stopping step of step S18 a.

As described above, the control unit 110 operates the chase position adjustment unit 65 based on the amount of positional deviation stored in the second memory.

Step S13 b: printing process

When the movable table 150 moves the workpiece 69, the control unit 110 lowers the upper and lower columns 51 at time T4, and the printing unit 60 performs printing.

The operation of the printing process of step S13b is the same as the operation of the printing process of step S13 a.

When the movable table 150 carries the workpiece 69, the controller 110 raises the hot air blower 303 at time T4 to supply hot air.

Step S19 b: scraper movement

As described above, the control unit 110 advances and retreats the position of the drive roller 73, and brings the drive roller 73 into contact with the transfer roller 46.

When the moving table 150 is not moving, the control unit 110 couples the belt moving mechanism 40 and the driving mechanism 70 to circulate the endless belt 41.

Further, when the moving table 150 moves, the control unit 110 performs control for disconnecting the connection between the belt moving mechanism 40 and the driving mechanism 70.

Effects of embodiment 1

According to this embodiment, since no rotational force acts on the table shaft by printing from the inside toward the outside in the radial direction, the printing accuracy is improved.

According to this embodiment, since the control unit 110 rotates the movable table 150 in the forward direction and the reverse direction and the printing unit 60 performs printing, the arrangement of the components located below the movable table 150 is easier than the case where the movable table 150 is rotated only in the forward direction or only in the reverse direction to perform printing.

According to this embodiment, the controller 110 repeats the normal rotation and the reverse rotation of the movable table 150, and therefore, the cable and the signal line are not wound.

According to this embodiment, since the removing portion 90 removes the ink 68, the endless belt 41 can be circulated to perform screen printing.

Since the removing portion 90 is located directly below the endless belt 41, the ink 68 can be removed by the gravity of the ink 68 when the ink 68 is removed.

According to this embodiment, since the driving mechanism 70, the removing section 90, and the hot air supply section 300 are moved downward, the belt moving mechanism 40 can be rotationally moved by the moving table 150.

Since the control unit 110 of the present embodiment starts the carrying out of the workpiece 69 by the workpiece mounting unit 30 and the printing on the workpiece 69 by the printing unit 60 at the same time after the rotation of the movable table 150, the time can be shortened.

Since the control unit 110 of the present embodiment starts installation of the workpiece 69 of the workpiece mounting unit 30 when the printing squeegee moves after printing, time can be reduced.

Other structures

The number of the workpiece mounting section 30 and the belt moving mechanism 40 is not limited to two. The movable table 150 may have one, three, four, or five or more workpiece mounting portions 30 and the belt moving mechanism 40.

This embodiment can be applied even when the number of the workpiece mounting portion 30 and the belt moving mechanism 40 is one, and the positions of the workpiece mounting portion 30 and the belt moving mechanism 40 are fixed to a table that is not rotationally moved by the moving table 150 but linearly moved back and forth.

This embodiment can be applied even when the number of the workpiece mounting section 30 and the belt moving mechanism 40 is one and the positions of the workpiece mounting section 30 and the belt moving mechanism 40 are fixed without moving.

Instead of rotating the motor 71 counterclockwise to carry out the workpiece 69 rightward, the control unit 110 may rotate the motor 71 clockwise to carry out the workpiece 69 leftward.

The number of workpieces 69 placed on the endless belt 41 is not limited to one, and a plurality of workpieces 69 may be placed simultaneously, and a plurality of workpieces 69 may be printed by one printing.

The transmission of the driving force is not limited to the case of using the pulley and the belt, and may be the case of using the meshing of the teeth of the gears.

The removal portion 90 may print only the inside of the outer periphery of the workpiece 69, instead of full-coat printing the workpiece 69. The removing portion 90 may be used for removing foreign matter or dust on the surface of the endless belt 41, in addition to the ink 68 on the surface of the endless belt 41.

The removal portion 90 may not be fixed to the base 50, and may be fixed to the movable table 150. When removing unit 90 is fixed to transfer table 150, removing unit 90 is always positioned below belt transfer mechanism 40, and removing unit 90 and belt transfer mechanism 40 rotate simultaneously with the rotation of transfer table 150.

The removing portion 90 may be fixed to a lower portion of the tape moving mechanism 40. Since the ink 68 may fall from the endless belt 41 if the removal of the ink 68 is slow, the removing unit 90 is preferably disposed at a position closer to the discharge position of the workpiece 69.

Embodiment 2.

In embodiment 2, a point different from embodiment 1 will be described.

Description of the structure

Fig. 7 is a configuration diagram of the screen printing apparatus 100 according to embodiment 2.

The screen printing apparatus 100 according to embodiment 2 differs from that according to embodiment 1 in the drive section 170 of the belt moving mechanism 40 and the drive mechanism 70.

< Belt moving mechanism 40 >)

The belt moving mechanism 40 has a forward transfer roller 461 and a backward transfer roller 462.

The forward transmission roller 461 is a roller that transmits a driving force for advancing the endless belt 41.

The backward transmission roller 462 is a roller that transmits a driving force for backward moving the endless belt 41.

The forward transmission roller 461 and the backward transmission roller 462 are rotatably fixed to the fixing plate 99 of the movable table 150 by the fixing tool 58.

The forward transfer roller 461 has a pulley 471 on a side, and the pulley 471 rotates by the rotation of the forward transfer roller 461.

The reverse transmission roller 462 has a pulley 472 on a side, and the pulley 472 rotates by the rotation of the reverse transmission roller 462.

A transmission belt 491 is hung on the pulley 471 and the pulley 44.

A transmission belt 492 is hung on the pulley 472 and the pulley 45.

< Driving section 170 of Driving mechanism 70 >)

The driving section 170 has a forward driving roller 731 and a backward driving roller 732.

The forward driving roller 731 is a roller that generates a driving force for advancing the endless belt 41.

The backward driving roller 732 generates a driving force for backward moving the endless belt 41.

A forward driving roller 731 and a backward driving roller 732 are rotatably attached to the movable base 77.

A pulley 741 is fixed to the rotation shaft of the forward driving roller 731.

The backward driving roller 732 has a pulley 742 fixed to its rotation shaft.

One transmission belt 76 is hung on the pulley 72, the pulley 741, and the pulley 742.

Description of actions

When the workpiece 69 is moved to the right, the same operation as the tape circulation starting step of step S15 in embodiment 1 is performed.

That is, the control unit 110 pushes up the up-down pins 82 of the up-down cylinders 81, rotates the movable base 77 counterclockwise, and brings the outer circumference of the forward driving roller 731 into contact with the outer circumference of the forward transmission roller 461.

The counterclockwise rotation of the motor 71 rotates the pulley 72, and the rotation of the pulley 72 rotates the pulley 741 via the transmission belt 76. The forward driving roller 731 rotates counterclockwise by the rotation of the pulley 741.

The counterclockwise rotation of the forward driving roller 731 rotates the forward transmission roller 461, and the rotation of the forward transmission roller 461 rotates the pulley 471. The rotation of the pulley 471 rotates the pulley 44 via the transmission belt 491. The belt roller 42 rotates clockwise by the rotation of the pulley 44. The endless belt 41 is circulated clockwise by the rotation of the belt roller 42.

Thus, if the motor 71 rotates counterclockwise, the endless belt 41 moves rightward, and the workpiece 69 moves rightward.

When the workpiece 69 is moved leftward, the control unit 110 pushes down the upper and lower pins 82 of the upper and lower cylinders 81, rotates the movable base 77 in the clockwise direction, and brings the outer periphery of the backward driving roller 732 into contact with the outer periphery of the backward transmission roller 462.

The clockwise rotation of the motor 71 rotates the pulley 72, and the rotation of the pulley 72 rotates the pulley 742 via the transmission belt 76. The reverse drive roller 732 rotates clockwise by the rotation of the pulley 742.

The clockwise rotation of the reverse drive roller 732 rotates the reverse transmission roller 462, and the rotation of the reverse transmission roller 462 rotates the pulley 472. The rotation of the pulley 472 rotates the pulley 45 via the transmission belt 492. The belt roller 43 rotates counterclockwise by the rotation of the pulley 45. The endless belt 41 is circulated counterclockwise by the rotation of the belt roller 43.

Thus, if the motor 71 rotates in the clockwise direction, the endless belt 41 moves rightward, and the workpiece 69 moves rightward.

Effects of embodiment 2

When the endless belt 41 is moved rightward, the belt roller 42 on the right pulls the endless belt 41. In contrast, in the case where the endless belt 41 is moved leftward, the belt roller 43 on the left side pulls. In this way, the endless belt 41 is not pressed in the moving direction, and therefore the shape of the endless belt 41 is not deformed.

Other structure

In embodiment 2, a take-up type coil may be used instead of the endless belt 41. The roll paper or roll type non-woven fabric is softer. In embodiment 2, since the coil can be pulled in the left-right moving direction, even in the case of a flexible coil, the coil can be moved in the winding direction and the unwinding direction without deforming the coil.

That is, the belt of embodiment 2 may not be an endless belt, and the belt of embodiment 2 may be a long belt-shaped article. A roll is an example of a belt that does not circulate.

Embodiment 3.

In embodiment 3, a point different from embodiment 1 will be described.

Description of the structure

Fig. 8 is a configuration diagram of a belt moving mechanism 40 and a driving mechanism 70 according to embodiment 3.

Fig. 8 (a) shows a structure in which a drive roller 73 is fixed to a rotary shaft of a motor 71, and a pulley 72 and a transmission belt 76 are omitted from the drive mechanism 70.

Fig. 8 (b) shows a structure in which the transmission roller 46 is fixed to the rotation shaft of the belt roller 42, and the pulley 44 and the transmission belt 49 are omitted from the belt moving mechanism 40.

Fig. 8 (c) shows a structure in which a drive roller 73 is fixed to a rotation shaft of a motor 71, a pulley 72 and a transmission belt 76 are omitted from the drive mechanism 70, a transmission roller 46 is fixed to a rotation shaft of a belt roller 42, and a pulley 44 and a transmission belt 49 are omitted from the belt moving mechanism 40.

Effects of embodiment 3

In this embodiment, the number of parts can be reduced.

Embodiment 4.

In embodiment 4, a point different from embodiment 1 will be described.

Description of the structure

Fig. 9 (a) is a structural diagram of the driving unit 170 and the position moving unit 180.

As in embodiment 1, the motor 71 and the driving roller 73 are attached to the movable base 77.

The movable base 77 is fixed to upper and lower pins 82 of the upper and lower cylinders 81.

The upper and lower cylinders 81 are fixed to the base 50.

When the driving mechanism 70 is moved up and down, the control unit 110 moves the up-down pins 82 of the up-down cylinder 81 up and down.

The position moving unit 180 moves the driving unit 170 up and down alone without swinging the driving unit 170, and brings the driving roller 73 into contact with the transfer roller 46.

Although not shown, the position moving unit 180 may move the driving unit 170 left and right or obliquely, and bring the driving roller 73 into contact with the transfer roller 46.

Fig. 9 (b) is a structural view of the driving unit 170 and the position moving unit 180.

The movable base 77 is arc-shaped.

A receiving tray is formed on the upper portion of the fixing post 84.

The moving base 77 is placed on a receiving tray of the fixed post 84.

The upper and lower pins 82 of the upper and lower cylinders 81 contact the sides of the movable base 77.

The position moving unit 180 is formed in an arc shape in which the lower end of the moving base 77 is downwardly convex, the top of the fixed post 84 is formed in a receiving tray shape, and the lower end of the moving base 77 is placed on the top of the fixed post 84 to swing like a cradle.

Effects of embodiment 4

In this embodiment, since the rotation shaft 85 is not used, the structure becomes simple.

Embodiment 5.

In embodiment 5, a point different from embodiment 1 will be described.

Description of the structure

Fig. 10 to 13 are a front view configuration diagram and an AA sectional view of a screen printing apparatus 100 according to embodiment 5.

Fig. 10 to 13 correspond to fig. 1 to 4, but differ in the bottom plate 153 of the movable table 150 and the fixture 58.

In embodiment 5, the bottom plate 153 of the movable table 150 is also present in the cutout shaped like コ, and an opening 154 for exposing the outer lower surface of the endless belt 41 is formed in the center of the bottom plate 153 present in the cutout shaped like コ of the movable table 150. The opening 154 is a rectangle having the same size as the planar shape of the belt moving mechanism 40, and the entire lower surface of the endless belt 41 is exposed downward. Three fixing tools 58 are provided on both sides of the opening 154. As shown in fig. 12 and 13, the micrometer 158 and the guide 159 are provided in one fixture 58, and by adjusting the micrometer 158, the position of the fixture 58 can be moved left and right along the guide 159, and the left and right positions of the rotation axis of the roller of the belt moving mechanism 40 can be adjusted.

The fixture 58 is not fixed to the fixing plate 99 of the movable table 150, but is fixed to the bottom plate 153 of the movable table 150. The fixture 58 according to embodiment 5 is provided to stand upward from the bottom plate 153 with respect to each roller. The belt roller 42, the belt roller 43, the transfer roller 46, and the receiving roller 98 are rotatably fixed to the movable table 150 by a fixing tool 58 standing from a bottom plate 153.

The control unit 110 lowers the scraping blade 91, the adhesive roller portion 910, and the solvent roller portion 920 to a position lower than the lower surface of the bottom plate 153 of the movable table 150 while the movable table 150 is moving. When removing the ink 68, the control unit 110 raises the scraper blade 91, the adhesive roller portion 910, and the solvent roller portion 920 to pass through the opening 154, thereby removing the ink 68.

Since the opening 154 is formed in the bottom plate 153, the drive mechanism 70 can remove the ink 68 from the outer lower surface of the endless belt 41, as in embodiment 1.

Embodiment 6.

In embodiment 6, a point different from embodiment 5 will be described.

Description of the structure

Fig. 14 is a configuration diagram of a screen printing apparatus 100 according to embodiment 6.

The screen printing apparatus 100 according to embodiment 6 is a screen printing apparatus 100 according to embodiment 5 that is lower in structure than the belt moving mechanism 40 and the driving section 170 of the driving mechanism 70 according to embodiment 2.

Thus, embodiments 2 and 5 can be combined.

Embodiment 7.

In embodiment 7, a point different from embodiment 5 will be described.

Description of the structure

Fig. 15 and 16 are a front view structural diagram and an AA sectional view of the base 50 and the movable table 150 according to embodiment 7.

The movable table 150 according to embodiment 7 is configured such that the structure of the movable table 150 according to embodiment 1 is simplified and the fixing plate 99 is directly fixed to the table shaft 156.

According to embodiment 7, the structure of the moving table 150 is simplified.

Embodiment 8.

In embodiment 8, points different from those in the above-described embodiments will be described.

Description of the structure

Fig. 17 is a flowchart of a screen printing method according to embodiment 7.

Fig. 17 of embodiment 8 differs from fig. 6 of embodiment 1 in the following 2 points.

Difference 1

The control unit 110 of the present embodiment performs printing only on the workpiece 69 by the printing unit 60 when the printing unit 60 prints on the workpiece 69.

In fig. 17, when the printing step S13a and the printing step S13b are executed, other operations are stopped.

That is, the belt circulation starting step 15b is started after the printing step S13a is completed.

The tape circulation starting step 15a is started after the printing step S13b is completed.

When the printing process S13a and the printing process S13b are executed, since no other operation is executed, vibration due to the other operation does not occur at the time of printing. Therefore, accurate printing can be performed.

Difference 2

The control unit 110 of the present embodiment executes only installation of the workpiece 69 of the workpiece mounting unit 30 when installing the workpiece 69 of the workpiece mounting unit 30.

In fig. 17, when the workpiece setting and suction starting step S11a and the workpiece setting and suction starting step S11b are executed, other operations are stopped.

That is, the movement of the squeegee is started after the workpiece setting and suction start step S11b is completed.

The movement of the squeegee is started after the workpiece setting and suction start step S11a is completed.

Since no other operation is performed when the workpiece setting and suction starting step S11a and the workpiece setting and suction starting step S11b are executed, vibration due to the other operation does not occur at the time of positioning the workpiece. Therefore, accurate positioning can be performed.

Only one of the different point 1 and the different point 2 may be executed.

Supplement to embodiments

In the embodiment, the case of the screen printing apparatus 100 is described, but the belt driving apparatus 200 is not limited to the screen printing apparatus 100 and may be used in other apparatuses. For example, the tape drive device 200 can be used in a coating device, a surface processing device, and the like by using a coating unit, a surface processing unit, and the like instead of the printing unit 60.

The function of the control unit 110 may be realized by a combination of software and hardware. That is, a part of the control unit 110 may be implemented by software, and the rest of the control unit 110 may be implemented by hardware.

The embodiments are examples of preferred embodiments, and are not intended to limit the technical scope of the present invention. The embodiments may be partially implemented or implemented in combination with other embodiments. Further, the foregoing embodiments may be combined.

The order described using flowcharts and the like is an example of the order of the method or program according to the present invention.

Description of the reference numerals

30 a workpiece mounting part; 300 a hot air supply unit; 301 air heater; 302 a pipe; 303 a hot air blowout device; 304, upper and lower pins; 305 up and down cylinders; 306 hot air; 307 blow out holes; 40 belt moving mechanism; 41 an endless belt; a 411V character guide body; 42 a belt roller; a 421V groove; 43 belt rollers; 44 belt wheels; 45 belt wheels; 46 a transfer roller; 461 advancing transfer rollers; 462 backing the transfer roll; 47 belt wheels; 471 pulleys; 472 a pulley; 48 through holes; 49 a transfer belt; 491 a transfer belt; 492 transfer tape; 50, a base station; 51, upper and lower columns; 52 beam mounts; 55 a suction part; 56 a suction tube; 57 a suction groove; 58 fixing the appliance; 59 pushing and pressing the surface; 60 a printing part; 61 a printing mechanism; 62 a printing squeegee; 63, screen plate making; 64 a mounting mechanism; 65 chase position adjustment part; 66 cameras; 67 chase control section; 68 ink; 69 a workpiece; 70 a drive mechanism; 71 a motor; 72 belt wheels; 73 a drive roller; 731 advancing the drive roller; 732 retreating drive roller; 74 belt pulleys; 741 a pulley; 742 a pulley; 75 tensioning the pulley; 76 a transfer belt; 77 moving the seat; 170 a driving part; a 180-position moving section; 81, upper and lower cylinders; 82, upper and lower pins; 83 fixing a column; 84 fixing columns; 85 a rotating shaft; 90 a removal part; 91 scraping a scraper; 910 adhering the roller portion; a 911 holding unit; 912 a rotation axis; a 913 spring; 914 a base part; 916 an adhesive roller; 917 rotation axis; 918 roll shafts; 920 a solvent roll portion; 921 a holding part; 922 a rotating shaft; 923 a spring; 924 a base portion; a 926 solvent roll; 927 solvent reservoir; 94 cylinders; 95 pins; 96 an aspirator; 97 upper and lower parts; 98 a take-up roll; 99 fixing the plate; 100 a screen printing device; 110 a control unit; 111 a signal line; 150 moving the table; 151 a worktop; 152 a setting part; 153 a base plate; 154 opening part; 155 a carry-in device; 156 a table shaft; 157 a take-off device; 158 micrometer; 159 a guide body; 200 belt drive.

Claims

1. A screen printing apparatus is characterized in that,

the disclosed device is provided with:

a movable table having a plurality of workpiece mounting sections centered on a table axis and rotating about the table axis;

a printing unit configured to print the work mounted on the plurality of work mounting units from the inside toward the outside in the radial direction; and

a control part for rotating the movable worktable in the forward direction and the reverse direction and executing printing by the printing part.

2. A screen printing apparatus according to claim 1,

the control unit starts the carrying-out of the workpiece by the workpiece mounting unit and the printing on the workpiece by the printing unit simultaneously after the rotation of the movable table.

3. A screen printing apparatus according to claim 1,

the control unit performs only printing on the work by the printing unit when the printing unit prints on the work.

4. A screen printing apparatus according to any one of claims 1 to 3,

the control unit sets only the workpiece in the workpiece loading unit when setting the workpiece in the workpiece loading unit.

5. A screen printing apparatus according to any one of claims 1 to 4,

the disclosed device is provided with:

a belt moving mechanism for moving the endless belt; and

the removing portion is a removing portion disposed below the endless belt, and removes the ink adhering to the endless belt by an adhesive force when the endless belt is circulated.

6. A screen printing apparatus according to claim 5,

the removing section includes an adhesion roller for adhering and removing the ink.

7. A screen printing apparatus according to claim 5 or 6,

the removing section has a solvent roller containing a solvent.

8. A screen printing apparatus according to any one of claims 5 to 7,

the hot air supply unit is disposed below the printing unit and the endless belt and blows hot air.

9. A screen printing apparatus according to any one of claims 1 to 8,

comprises the following components:

a camera for photographing the workpiece loaded on the workpiece loading part; and

a frame position adjusting part for adjusting the setting position of the screen plate making;

the control part detects the position deviation amount of the printing pattern according to the image shot by the camera, makes the position deviation amount correspond to the plurality of workpiece loading parts and stores the position deviation amount in a memory;

the control unit adjusts the setting position of the screen plate making by the plate frame position adjusting unit based on the amount of positional deviation corresponding to the workpiece mounting unit on which the workpiece is mounted, before printing the workpiece.

10. A screen printing apparatus according to claim 9,

the control part is used for controlling the operation of the control part,

using the value of the positional deviation amount in the X-axis direction and the Y-axis direction as the original value for the positional adjustment of the chase;

the value obtained by inverting the positive and negative values of the value of the positional deviation amount in the rotation axis direction is used for the position adjustment of the chase.

11. A screen printing method is characterized in that,

rotating a movable table having a plurality of workpiece mounting sections around a table axis in a forward direction and a reverse direction around the table axis;

the printing portion prints on the workpieces mounted on the plurality of workpiece mounting portions from the inside toward the outside in the radial direction.

12. The screen printing method according to claim 11,

after the rotation of the movable table, the carrying-out of the workpiece by the workpiece carrying section and the printing on the workpiece by the printing section are started at the same time.

13. The screen printing method according to claim 11,

when the printing portion prints on the workpiece, only the printing portion prints on the workpiece.