JP2012206445A - Screen printing machine and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screen printing machine and a screen printing method which can improve work efficiency of changing work of a squeegee size in response to a size of a substrate.SOLUTION: A pair of leakage preventing members 33 mounted on a squeegee holder 31 for holding a squeegee 32 are slid together with the squeegee 32 on a mask 5 to prevent rolling paste Ps on the mask 5 from leaking to both sides of the squeegee 32. The pair of leakage preventing members 33 are mounted on the squeegee holder 31 at a spacing depending on a dimension in a width direction of the squeegee 32 held by the squeegee holder 31.

Description

  The present invention relates to a screen printer for printing by transferring a paste onto a substrate by sliding the squeegee against the mask in contact with the upper surface of the substrate and rolling the paste supplied on the mask on the mask with the squeegee. And a screen printing method.

  A screen printer is a device that prints by transferring a paste such as a solder paste or a conductive paste to each of a plurality of electrodes provided on a substrate, and has an opening formed according to the electrode arrangement of the substrate. The mask is brought into contact with the upper surface of the substrate so that the opening and the electrode coincide with each other, a paste is supplied onto the mask, and a bowl-shaped squeegee is slid on the mask. As a result, the paste moves on the mask while being rotated (rolled) between the mask and the squeegee, is filled in the opening of the mask, and the paste is transferred to the electrodes on the substrate. When separated, the paste remains on the electrode and the paste is printed on the electrode.

  In such a screen printing machine, a pair of leakage prevention members attached to a squeegee holder for holding a squeegee is provided so that the paste rolled on the mask can be efficiently filled into the opening of the mask. It is known that the paste being rolled on the mask is prevented from leaking to the both sides of the squeegee along the width direction from the center of the squeegee by sliding on the mask together with the squeegee (for example, Patent Document 1).

JP 2004-34638 A

  In general, in a screen printing machine, multiple types of squeegee holders with squeegees with different sizes (dimensions in the width direction) are prepared according to the size of the substrate to be screen printed, and the squeegees are exchanged together. Thus, the width direction dimension (squeegee size) of the squeegee can be changed. However, the squeegee holder replacement work performed for each squeegee holder has a problem that the workability is not good because the squeegee holder is heavy and the attachment / detachment work from the squeegee holder for moving the squeegee holder is difficult.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a screen printing machine and a screen printing method capable of improving the workability of changing the squeegee size according to the size of the substrate.

  The screen printing machine according to claim 1, wherein the mask that is in contact with the upper surface of the substrate and the mask that is in contact with the upper surface of the substrate slide to roll the paste supplied on the mask on the mask. A screen printing machine having a squeegee for transferring the paste to the substrate, attached to a squeegee holder that holds the squeegee, and sliding on the mask together with the squeegee so that the paste being rolled on the mask is from the center of the squeegee A pair of leakage prevention members that prevent leakage to both sides of the squeegee along the width direction, the pair of leakage prevention members being spaced at intervals according to the width direction dimension of the squeegee held by the squeegee holder Can be attached to.

  A screen printing machine according to a second aspect is the screen printing machine according to the first aspect, wherein a squeegee having a width direction dimension that matches a width direction dimension of the substrate is attached to the squeegee holder.

  The screen printing method according to claim 3, wherein the mask is brought into contact with the upper surface of the substrate, the squeegee is slid with respect to the mask in contact with the upper surface of the substrate, and the paste supplied onto the mask is masked by the squeegee. The paste being rolled on the mask by sliding a pair of leakage prevention members attached to a squeegee holder holding the squeegee together with the squeegee on the mask. A screen printing method for preventing leakage from the center of the squeegee along the width direction to both sides of the squeegee, wherein the pair of leakage prevention members are adapted to the dimension in the width direction of the squeegee held by the squeegee holder. Attach to the squeegee holder at regular intervals.

  A screen printing method according to a fourth aspect of the present invention is the screen printing method according to the third aspect, wherein a squeegee having a widthwise dimension that matches the widthwise dimension of the substrate is attached to the squeegee holder.

  In the present invention, a pair of leakage preventing members that prevent the paste being rolled on the mask from leaking to both sides of the squeegee are attached to the squeegee holder at intervals according to the widthwise dimension of the squeegee held by the squeegee holder. In order to change the squeegee size, the squeegee having an appropriate width direction dimension is held in the squeegee holder, and the pair of leakage prevention members are adjusted to an interval according to the width direction dimension of the squeegee. Therefore, it is not necessary to replace the squeegee together with the squeegee holder, so that the workability of changing the squeegee size according to the size of the substrate can be greatly improved.

1 is a schematic configuration diagram of a screen printing machine according to an embodiment of the present invention. The side view of the screen printer in one embodiment of the present invention The front view of the screen printer in one embodiment of the present invention The top view of the screen printer in one embodiment of the present invention The perspective view of the squeegee unit with which the screen printer in one embodiment of this invention is provided. The partial expanded side view of the squeegee unit with which the screen printer in one embodiment of this invention is provided. The disassembled perspective view of the squeegee unit with which the screen printer in one embodiment of this invention is provided. The partial expansion disassembled side view of the squeegee unit with which the screen printer in one embodiment of this invention is provided. (A) (b) (c) (d) Rear view of a squeegee unit provided in a screen printing machine according to an embodiment of the present invention. The flowchart which shows the execution procedure of the screen printing method by the screen printer in one embodiment of this invention

  Embodiments of the present invention will be described below with reference to the drawings. The screen printer 1 shown in FIGS. 1, 2 and 3 carries in the substrate 2, prints the paste Ps on the plurality of electrodes 2a (FIG. 4) provided on the carried-in substrate 2, and prints the paste Ps. A device that repeatedly executes a series of steps including carrying out the substrate 2. The substrate holding / moving unit 4 is provided on the base 3 to carry, position, hold, and move the substrate 2, and above the substrate holding / moving unit 4. Control for controlling the operation of the mask 5 provided on the screen 5, the camera unit 6 provided below the mask 5 so as to be movable in the horizontal plane direction, the squeezing mechanism 7 provided above the mask 5, and the screen printing machine 1 A device 8 is provided. In the following description, for the sake of convenience, the horizontal plane direction in which the substrate 2 is transported in the screen printing machine 1 is defined as the X axis direction, the horizontal plane direction orthogonal to the X axis direction is defined as the Y axis direction, and the vertical direction is defined as the Z axis. Further, the Y-axis direction is the front-rear direction of the screen printing machine 1, the X-axis direction is the lateral (left-right) direction of the screen printing machine 1, and an operator (not shown) works on the screen printing machine 1 in the front-rear direction. The side (right side of FIG. 1 and FIG. 2) is the front side of the screen printer 1, and the opposite side (left side of FIG. 1 and 2) is the rear side.

  2 and 3, the substrate holding and moving unit 4 is moved in the three axial directions in the horizontal plane direction and the vertical direction by the Y table 11, the X table 12 and the θ table 13 stacked on the base 3. A possible base portion 14 is provided, and a pair of support columns 15 are provided at both ends of the upper surface of the base portion 14 in the Y-axis direction. The pair of support columns 15 are provided with a pair of conveyors 16 extending in the X-axis direction and a pair of clamp members 17 (see also FIG. 4) that can be opened and closed in the Y-axis direction. A lower receiving member 18 is provided to be movable up and down.

  The substrate holding / moving unit 4 receives and carries the substrate 2 supplied from the upstream process side by a pair of transfer conveyors 16, positions the substrate 2 at a predetermined position on the transfer conveyor 16, and then both ends of the substrate 2 in the Y-axis direction. Are clamped and held by the pair of clamp members 17 and the lower surface of the substrate 2 is received (supported) by the raised lower receiving member 18. The carrying and positioning operation of the substrate 2 by the transfer conveyor 16, the clamping operation of the substrate 2 by the pair of clamp members 17, and the receiving operation of the substrate 2 by the lower receiving member 18 are performed by the controller 8 as a substrate holding and moving unit operating mechanism (not shown). This is done by performing the operation control 19 (FIG. 1).

  2, 3, and 4, the mask 5 is supported by a mask frame 5 </ b> W made of a rectangular frame member in plan view, and the substrate is held in a rectangular region surrounded by the mask frame 5 </ b> W. A plurality of openings 5a (FIG. 4) formed in an arrangement corresponding to the arrangement of the electrodes 2a on the substrate 2 held by the moving unit 4, that is, the substrate 2 to be screen-printed are provided.

  2 and 3, the camera unit 6 includes a first camera 6a with the imaging field of view facing downward and a second camera 6b with the imaging field of view facing upward. As shown in FIG. 4, a pair of substrate-side marks 2m are provided at diagonal positions of the substrate 2 (only one substrate-side mark 2m is shown in FIG. 4). The camera 6a images these substrate side marks 2m from above the substrate 2. On the other hand, the mask 5 is provided with a pair of mask side marks 5m arranged corresponding to the substrate side mark 2m (FIG. 4 shows only one mask side mark 5m). The second camera 6 b images these mask side marks 5 m from below the mask 5.

  The movement operation of the camera unit 6 in the horizontal plane is performed by the operation control of the camera movement mechanism 20 (FIG. 1) including an actuator (not shown) by the control device 8. Further, the imaging operation by the first camera 6a and the second camera 6b is controlled by the control device 8, and the image data obtained by the imaging operation of the first camera 6a and the second camera 6b is transmitted to the control device 8 (FIG. 1).

  When the substrate 2 is held by the substrate holding / moving unit 4, the camera unit 6 controlled by the control device 8 enters an area between the substrate 2 and the mask 5, and the imaging of the substrate side mark 2m by the first camera 6a; The mask side mark 5m is imaged by the second camera 6b. The control device 8 determines the positions of the substrate 2 and the mask 5 based on the image of the substrate side mark 2m obtained by the imaging operation of the first camera 6a and the image of the mask side mark 5m obtained by the imaging operation of the second camera 6b. The relationship is calculated, and the substrate holding movement is performed so that the substrate-side mark 2m is positioned immediately below the mask-side mark 5m (that is, the substrate-side mark 2m and the mask-side mark 5m match in plan view, see FIG. 4). After the unit 4 is moved and the substrate 2 is aligned with the mask 5, the held substrate 2 is raised so that the electrode 2a of the substrate 2 and the opening 5a of the mask 5 are aligned with each other. Is brought into contact with the mask 5.

  2 and 3, the squeegee mechanism 7 includes a squeegee base 21 movably provided in the Y-axis direction, a pair of squeegee lifting cylinders 22 attached to the upper surface side of the squeegee base 21, and the pair of squeegee lifting / lowering. Squeegee unit movement comprising a pair of squeegee units 23 that are lifted and lowered independently of each other below the squeegee base 21 by a cylinder 22 and an actuator (not shown) that reciprocates the squeegee base 21 (and thus the squeegee unit 23) in the Y-axis direction. It consists of a mechanism 24 (FIG. 1).

  2, 3, 5, and 6, the squeegee unit 23 includes a squeegee holder 31 that is attached to the lower end of the rod 22 a of the squeegee lifting cylinder 22 and extends in the X-axis direction, and a flat plate shape that extends in the X-axis direction. The squeegee-like squeegee 32 having the upper part held by the squeegee holder 31 and the lower part extending obliquely below the squeegee holder 31, and the both ends of the squeegee 32 sandwiched from the width direction. And a pair of leakage prevention members 33 provided at positions, and the squeegee base 21 is moved up and down by the squeegee unit moving mechanism 24 and the squeegee unit 21 is moved upward and downward by the rod 22 a of the squeegee lifting cylinder 22. That is, each control of the movement operation of the squeegee unit 23 in the Y-axis direction is performed by the control device 8.

  When squeezing is performed to move the squeegee unit 23 in the Y-axis direction with the squeegee 32 in contact with the upper surface of the mask 5 in contact with the upper surface of the substrate 2 (arrow A shown in FIG. 6). The paste Ps supplied on the mask 5 is rolled (rotated) by the squeegee 32 (arrow B shown in FIG. 6), and the opening 5a of the mask 5 is filled with the paste Ps, and the electrode 2a on the substrate 2 is filled. The paste Ps is transferred to the surface. After the transfer of the paste Ps to the electrode 2a, when the plate separation is performed to lower the substrate 2 held by the control device 8 and separate the substrate 2 from the mask 5, the paste Ps remains on the electrode 2a of the substrate 2. The paste Ps is printed on the substrate 2.

  In this way, the squeegee 32 slides with respect to the mask 5 in contact with the upper surface of the substrate 2 in the screen printing machine 1 and rolls the paste Ps supplied on the mask 5 on the mask 5. The paste Ps is transferred to the surface.

  Here, in the above squeegeeing, the paste Ps rolling on the mask 5 is pressed by the squeegee 32 and leaks from the center of the squeegee 32 to both sides of the squeegee 32 along the width direction. However, the squeegee holder 31 is attached with a pair of leakage preventing members 33 at positions sandwiching both ends of the squeegee 32 from the width direction, and the pair of leakage preventing members 33 slide on the mask 5 together with the squeegee 32. As a result, the paste Ps rolling on the mask 5 is prevented from leaking to both sides of the squeegee 32, and the paste Ps is efficiently filled into the opening 5a of the mask 5.

  As described above, the screen printing machine 1 according to the present embodiment slides on the mask 5 that is in contact with the upper surface of the substrate 2 and the mask 5 that is in contact with the upper surface of the substrate 2, and is supplied onto the mask 5. A squeegee 32 that transfers the paste Ps to the substrate 2 by rolling the paste Ps on the mask 5 and a squeegee holder 31 that holds the squeegee 32 are mounted on the mask 5 by sliding on the mask 5 together with the squeegee 32. The rolling paste Ps is provided with a pair of leakage preventing members 33 for preventing leakage of the paste Ps from the center of the squeegee 32 to both sides of the squeegee 32 along the width direction.

  Here, the pair of leakage preventing members 33 can be attached to the squeegee holder 31 at intervals according to the width direction dimension W (FIG. 5) of the squeegee 32 held by the squeegee holder 31. The configuration will be described.

  5, 6, 7, and 8, the leakage prevention member 33 includes a vertical portion 33 a that extends in the Z-axis direction (vertical direction) and a horizontal portion that extends in the Y-axis direction (horizontal direction) from the lower end of the vertical portion 33 a. It has a portion 33b and is formed in an L shape as a whole. From the upper end of the vertical portion 33a, the leakage preventing member 33 is placed on the rear surface of the squeegee holder 31 (the surface opposite to the front surface facing the two squeegee units 23). ) Is provided to extend in the X-axis direction.

  5, 6, 7, and 8, the squeegee holder 31 includes a holder main body 31 a attached to the rod 22 a of the squeegee lifting cylinder 22 and a squeegee pressing member 31 b that is attached to and detached from the holder main body 31 a. The member 31b can be detachably fixed to the holder main body 31a by a fixing screw 31c. The squeegee 32 is attached to the squeegee holder 31 with the upper portion sandwiched between the holder main body 31a and the squeegee holding member 31b. It becomes the state extended diagonally.

  6, 7, and 8, a squeegee holder 31 is provided with a cavity portion 31 d that opens on the back side of the squeegee holder 31. The squeegee holder 31 has a cavity portion 31 d on the back side of the squeegee holder 31. A leakage prevention member mounting plate 41 having two upper and lower slide grooves 41a made of a through groove extending in the width direction (X-axis direction) of the squeegee 32 is detachably mounted by a plurality of plate mounting screws 42. ing.

  Each leakage prevention member 33 is screwed into two slide grooves 41 a provided on the leakage prevention member mounting plate 41 with two fixing bolts 43 inserted from the cavity 31 d side of the squeegee holder 31 and each fixing bolt 43. The two nuts 44 are detachably attached to the leakage prevention member attachment plate 41. Therefore, each leakage prevention member 33 loosens the nut 44 with respect to each fixing bolt 43, and then the two fixing bolts 43 slide in the two slide grooves 41a in the width direction (X-axis). The mounting position with respect to the squeegee holder 31 can be changed by tightening the nuts 44 with respect to the fixing bolts 43 after moving the squeegee holder 31 to the squeegee holder 31. The squeegee 32 can be attached to the squeegee holder 31 at an interval corresponding to the dimension W in the width direction.

  The operator measures the width direction dimension of the substrate 2 to be screen-printed (the dimension in the X-axis direction of the substrate 2 held by the substrate holding and moving unit 4; see FIG. 4; hereinafter also referred to as substrate size) S Is different from the substrate size S of the substrate 2 on which the screen printing has been performed so far, or when a new screen printing is started, the width direction dimension that matches the substrate size S of the substrate 2 to be screen printed from now on A squeegee holding operation for holding (attaching) the squeegee 32 having W (hereinafter also referred to as squeegee size) to the squeegee holder 31 is performed.

  In this squeegee holding operation, the operator first loosens the fixing screw 31c and removes the squeegee 32 from the holder body 31a (FIG. 9 (a) → FIG. 9 (b)), and then tries to perform screen printing. A squeegee 32 having a width direction dimension W that matches the substrate size S of the substrate 2 is attached to the squeegee holder 31, and the fixing screw 31c is tightened again. As a result, the squeegee 32 having the width direction dimension W that matches the substrate size S of the substrate 2 to be screen-printed will be attached to the squeegee holder 31 (FIG. 9C), and the squeegee holding operation is completed. The

  In this way, the squeegee 32 having the width direction dimension W that matches the width direction dimension (substrate size) S of the substrate 2 is attached to the squeegee holder 31 larger than the width direction dimension S of the substrate 2. When the squeegee 32 having the width direction dimension W is used, the pressing force of the squeegee 32 acts on the area on the mask 5 that exceeds the width direction dimension S of the substrate 2 when performing squeezing, and the mask 5 is excessively large. This is because the load may act and the mask 5 may be damaged.

  When the operator finishes the above squeegee holding operation, the operator then adjusts the interval between the leakage preventing members 33 attached to the squeegee holder 31 at intervals according to the width direction dimension W of the squeegee 32 held by the squeegee holder 31. Do work.

  In the leakage prevention member interval adjustment operation, the operator loosens the two nuts 44 in each leakage prevention member 33 with respect to the fixing bolts 43 and then moves the fixing bolts 43 of each leakage prevention member 33 in the two slide grooves 41a. Each of the leakage prevention members 33 is moved with respect to the leakage prevention member mounting plate 41 (that is, with respect to the squeegee holder 31) so that the pair of leakage prevention members 33 sandwiches both ends of the squeegee 32 from the width direction. When the distance between the two leakage prevention members 33 is equal to the distance according to the width direction dimension W of the squeegee 32 held by the squeegee holder 31, the loosened nut 44 is tightened to tighten the two leakage prevention members 33. Is fixed to the leakage prevention member mounting plate 41 (that is, to the squeegee holder 31). As a result, the pair of leakage prevention members 33 are attached to the squeegee holder 31 at intervals according to the width direction dimension W of the squeegee 32 held by the squeegee holder 31 (FIG. 9D), and the leakage prevention member interval Adjustment work is completed.

  Next, a screen printing method by the screen printer 1 in the present embodiment will be described with reference to FIG. In the screen printing method by the screen printer 1, the control device 8 first reads the width-direction dimension (substrate size) S of the substrate 2 to be screen-printed from the execution program in which the screen printing execution procedure is recorded (see FIG. Step ST1 shown in FIG. Then, it is determined whether or not the read substrate size S is different from the substrate size S that has been screen printed last time (step ST2 shown in FIG. 10). As a result, the read substrate size S has been screen printed last time. If it is different from the substrate size S (including the case where screen printing is newly started), the control device 8 sends a message prompting the replacement of the squeegee 32 to the control device 8 together with the substrate size S to be screen-printed from now on. After being output to the input / output device 50 (FIG. 1) such as a connected touch panel (step ST3 shown in FIG. 10), it enters a state waiting for an operation input by the operator (step ST4 shown in FIG. 10). Here, when the operator confirms the substrate size S output to the input / output device 50, the operator removes the squeegee 32 currently attached to the squeegee holder 31 and outputs it to the input / output device 50 according to the procedure described above. A squeegee holding operation is performed to hold the squeegee 32 having the width direction dimension W matching the substrate size S to be screen-printed on the squeegee holder 31, and the distance between the pair of leakage preventing members 33 is attached to the squeegee holder 31. After performing the leakage prevention member interval adjustment operation for adjusting the interval of the leakage prevention member 33 so as to match the interval of the squeegee 32, a predetermined operation input is performed from the input / output device 50.

  When the control device 8 detects that the operator has input the predetermined operation, or in step ST2 described above, the substrate size S read from the execution program is the same as the substrate size S on which the previous screen printing was performed. Is detected, the substrate 2 sent from the apparatus on the upstream process side of the screen printing machine 1 is carried by the conveyor 16 and positioned at the work position, and the substrate 2 is detected by the pair of clamp members 17. And holding the substrate 2 by holding the substrate 2 in contact with the lower surface of the substrate 2 (step ST5 shown in FIG. 10).

  When holding the substrate 2 in step ST5, the control device 8 controls the operation of the camera moving mechanism 20, and advances the camera unit 6 to an area between the substrate 2 and the mask 5 held by the substrate holding and moving unit 4. After that, the substrate side mark 2m is imaged from above by the first camera 6a, and the mask side mark 5m is imaged from above by the second camera 6b. Then, based on both the obtained images, the substrate holding / moving unit 4 is moved so that the substrate side mark 2m is positioned immediately below the mask side mark 5m, thereby aligning the substrate 2 with respect to the mask 5 (FIG. 10). Step ST6 shown).

  After aligning the substrate 2 with respect to the mask 5 in step ST6, the control device 8 controls the operation of the substrate holding and moving unit 4 to raise the base portion 14 so that the upper surface of the substrate 2 contacts the lower surface of the mask 5 Let (Step ST7 shown in FIG. 10).

  When the upper surface of the substrate 2 is brought into contact with the lower surface of the mask 5 in step ST7, the control device 8 enters a state of waiting for an operation input by the operator (step ST8 shown in FIG. 10). Here, the operator confirms the amount of the paste Ps on the mask 5, and performs a predetermined operation input from the input / output device 50 when determining that the paste Ps does not need to be supplied (added) onto the mask 5. When it is determined that the paste Ps needs to be supplied onto the mask 5, the paste Ps is supplied onto the mask 5 by a separately prepared paste supply device, and then a predetermined operation input is performed from the input / output device 50.

  When the control device 8 detects that the operator has input the predetermined operation, the control device 8 performs squeegeeing of the paste Ps by the squeegee mechanism 7 described above, and the squeegee 32 removes the paste Ps on the mask 5. The paste Ps is transferred to the substrate 2 by rolling (step ST9 shown in FIG. 10).

  In step ST9, when the squeegee base 21 is moved from the front to the rear of the screen printing machine 1 (from right to left in FIG. 1 and FIG. 2), the squeegee 32 positioned in front is brought into contact with the mask 5. When the squeegee base 21 is moved from the rear to the front of the screen printing machine 1 (from the left to the right in FIG. 1 and FIG. 2), the squeegee 32 located at the rear is applied to the mask 5. Squeeze by touching.

  When the squeezing in step ST9 is completed, the control device 8 lowers the base portion 14 to separate the substrate 2 from the mask 5. As a result, the plate is separated, and the paste Ps is printed on the electrode 2a on the substrate 2 (step ST10 shown in FIG. 10).

  When the plate separation in step ST10 is completed, the control device 8 releases the holding of the substrate 2 by releasing the clamping of the substrate 2 by the clamp member 17 and lowering the receiving member 18 (step ST11 shown in FIG. 10). . Then, the conveyor 16 is operated to carry it out to an apparatus on the downstream process side of the screen printing machine 1 (for example, a component mounting machine for mounting components on the board 2) (step ST12 shown in FIG. 10).

  After unloading the substrate 2, the control device 8 then determines whether or not screen printing has been completed for all the substrates 2 on which screen printing is to be performed (step ST13 shown in FIG. 10). If screen printing has not been completed for all the substrates 2 to be printed, the process returns to step ST1 to read the substrate size for which screen printing is to be performed (next). On the other hand, if screen printing has been completed for all the substrates 2 on which screen printing is to be executed in step ST13, a series of screen printing operations are terminated.

  As described above, in the screen printer 1 and the screen printing method according to the present embodiment, the pair of leakage preventing members 33 that prevent the paste Ps being rolled on the mask 5 from leaking to both sides of the squeegee 32 are provided. The squeegee 32 is attached to the squeegee holder 31 at intervals according to the width direction dimension W of the squeegee 32 held by the holder 31. It is only necessary to perform the above-described squeegee holding operation for holding, and the above-described leakage preventing member interval adjusting operation for adjusting the pair of leakage preventing members 33 to the interval according to the width direction dimension W of the squeegee 32. The work of changing the squeegee size according to the size of the board 2 is not necessary because the work of replacing the entire board 2 is unnecessary. It can be thermocline improved.

  In addition, since the squeegee 32 having a width direction dimension W that matches the width direction dimension S of the substrate 2 is attached to the squeegee holder 31, the mask 5 that exceeds the width direction dimension S of the substrate 2 when screen printing is performed. The pressing force of the squeegee 32 does not act on the upper region, and it is possible to prevent a situation in which an excessive load acts on the mask 5 and causes damage.

  Provided are a screen printing machine and a screen printing method capable of improving the workability of changing the size of a squeegee according to the size of a substrate.

DESCRIPTION OF SYMBOLS 1 Screen printer 2 Board | substrate 5 Mask 31 Squeegee holder 32 Squeegee 33 Leakage prevention member W Squeegee width direction dimension S Substrate width direction dimension Ps Paste

Claims (4)

A mask that is in contact with the upper surface of the substrate, and a squeegee that slides relative to the mask that is in contact with the upper surface of the substrate and causes the paste supplied on the mask to roll on the mask to transfer the paste to the substrate. A screen printing machine,
A pair of leaks that are attached to a squeegee holder that holds the squeegee and that slide on the mask together with the squeegee to prevent the paste being rolled on the mask from leaking from the center of the squeegee along the width direction to both sides of the squeegee Having a prevention member,
The screen printer according to claim 1, wherein the pair of leakage preventing members can be attached to the squeegee holder at intervals according to the widthwise dimension of the squeegee held by the squeegee holder.   The screen printing machine according to claim 1, wherein a squeegee having a width-direction dimension that matches a width-direction dimension of the substrate is attached to the squeegee holder. The process of bringing the mask into contact with the upper surface of the substrate, and the squeegee is slid against the mask in contact with the upper surface of the substrate, and the paste supplied on the mask is rolled on the mask by the squeegee to transfer the paste to the substrate And a pair of leakage preventing members attached to a squeegee holder for holding the squeegee slide on the mask together with the squeegee so that the paste being rolled on the mask extends from the center of the squeegee along the width direction. A screen printing method for preventing leakage to both sides,
A screen printing method, wherein a pair of leakage preventing members are attached to a squeegee holder at intervals according to the widthwise dimension of the squeegee held by the squeegee holder.   4. The screen printing method according to claim 3, wherein a squeegee having a width dimension that matches a width dimension of the substrate is attached to the squeegee holder.

Images