JP6785404B2 - Screen printing equipment and component mounting line - Google Patents

Description

The present invention relates to a screen printing apparatus that prints a paste on an object to be printed via a mask, and a component mounting line provided with the screen printing apparatus.

Conventionally, a screen printing device is known as a device for printing a paste such as solder on a pattern to be printed included in a printing object. When the paste is printed on the pattern to be printed on the object to be printed by the screen printing apparatus, a mask having an opening pattern corresponding to the pattern to be printed is prepared in advance. Then, the printed object is brought into contact with the lower surface of the mask, the paste is deposited on the pattern to be printed through the opening pattern, and then the printed object is separated from the mask (plate separation). As a result, the paste is printed on the pattern to be printed corresponding to the opening pattern.

In such a screen printing apparatus, it is necessary that the object to be printed and the mask are in accurate contact with each other so that the pattern to be printed and the opening pattern overlap each other. Therefore, a mark is provided on the mask, and a mark is also provided on the side of the print object, and after aligning both marks, the print object and the mask are brought into contact with each other. Here, when the print target is a film-like substrate and the print target is stretched and deformed in the plane, the pattern to be printed and the opening pattern do not completely overlap, but both of them. Make sure that the pattern to be printed and the aperture pattern overlap (in an average sense) as a whole (in an average sense) with an accuracy within the allowable range of deviation. Patent Document 1 below discloses a technique capable of accurately recognizing a deviation between a pattern to be printed and an aperture pattern by imaging three or more marks provided on a substrate.

Japanese Patent No. 46199696

However, in the above-mentioned conventional screen printing apparatus, when the degree of expansion and contraction deformation of the printing object is large, even if the deviation between the printed pattern and the opening pattern is accurately recognized, the printed pattern and the opening pattern There is a problem that printing defects of the paste on the printed object may occur because the printing cannot be performed with the accuracy within the permissible range.

Therefore, an object of the present invention is to provide a screen printing apparatus and a component mounting line in which printing defects are unlikely to occur even when the degree of expansion and contraction deformation of the printed object is large.

The screen printing device of the present invention is a screen printing device that prints a paste on a pattern to be printed of an object to be printed, and includes a standard mask, an enlargement mask, and a reduction mask having opening patterns having different sizes, and the standard mask, the above. expanding the mask, and the mask installation part that one of the reduced mask is placed, an imaging unit for imaging the printing object, the results obtained by imaging the pre-Symbol imaging unit, the standard mask, the larger mask, the standard mask based on the data of the opening pattern, respectively the reduced mask having the enlarged mask, a mask selector for selecting one mask from among the reduced mask, the mask selected in the mask selecting unit And a determination unit for determining whether or not the mask installed in the mask installation unit matches, and the opening pattern of the standard mask is a pattern to be printed when the object to be printed is not stretched or deformed. The opening pattern of the enlarged mask is provided in the corresponding size, and the opening pattern of the enlarged mask is provided in the size corresponding to the pattern to be printed when the print target is stretched and deformed, and the opening pattern of the reduced mask is provided on the print target. The mask selection unit is provided with a size corresponding to a pattern to be printed when reduction deformation occurs, and the degree of deformation of the print object is determined for each of the standard mask, the enlargement mask, and the reduction mask. If it does not belong to any of the deformation degree regions, an error is judged .

The component mounting line of the present invention is a screen printing device that prints a paste on a pattern to be printed on a printing object, and a printing object on which the paste is printed by the screen printing device based on pre-stored component mounting data. A component mounting line including a component mounting device for mounting components, wherein the screen printing device includes a standard mask, an enlargement mask, and a reduction mask having opening patterns having different sizes from each other , and the standard mask, the enlargement mask, and the above. a mask placed part one of the reduced mask is placed, an imaging unit for imaging the printing object, the results obtained by imaging the pre-Symbol imaging unit, the standard mask, the larger mask, the reduced mask respectively A mask selection unit that selects one mask from the standard mask, the enlargement mask, and the reduction mask based on the data of the opening pattern, and the mask and the mask installation that are selected in the mask selection unit. A determination unit for determining whether or not the mask is installed on the unit is provided , and the opening pattern of the standard mask has a size corresponding to the pattern to be printed when the print target is not stretched or deformed. The opening pattern of the enlarged mask is provided in a size corresponding to the pattern to be printed when the print target is stretched and deformed, and the opening pattern of the reduced mask is reduced and deformed on the print target. The mask selection unit is provided with a size corresponding to the pattern to be printed in the case where the degree of deformation of the print target is defined in each of the standard mask, the enlargement mask, and the reduction mask. If it does not belong to any of the above, an error is judged .

According to the present invention, printing defects are unlikely to occur even when the degree of expansion and contraction deformation of the printed object is large.

Top view showing the structure of the component mounting line in one embodiment of the present invention. Top view of the work object supplied to the component mounting line according to the embodiment of the present invention. (A) Plan view (b) Front view of the screen printing apparatus constituting the component mounting line according to the embodiment of the present invention. Side view of the screen printing apparatus according to the embodiment of the present invention (A) (b) (c) Plan view of each of the three masks included in the screen printing apparatus according to the embodiment of the present invention. A side view of a part of the screen printing apparatus according to the embodiment of the present invention. A block diagram showing a control system of a screen printing apparatus according to an embodiment of the present invention. A block diagram showing a control system of a component mounting device constituting a component mounting line according to an embodiment of the present invention. (A) (b) Operational explanatory view of the screen printing apparatus according to the embodiment of the present invention. A conceptual diagram showing how a mask is selectively attached to a screen printing apparatus according to an embodiment of the present invention. (A) (b) Operational explanatory view of the screen printing apparatus according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a component mounting line 1 according to an embodiment of the present invention. The component mounting line 1 is composed of a screen printing device 1A and a component mounting device 1B installed on the downstream process side of the screen printing device 1A. The screen printing device 1A is a device that screen-prints a paste such as solder on the pattern to be printed 2P (FIG. 2) of the printing object 2, and the component mounting device 1B is a printing target on which the paste is printed by the screen printing device 1A. This is a device for mounting the component Bh on the object 2. In the present embodiment, the printed object 2 is composed of a plurality of aligned (here, two) substrates 3, but the substrate 3 may be one. It is assumed that the two substrates 3 are film-like substrates.

In the present embodiment, the above-mentioned "plurality of aligned substrates 3" means a substrate in which a plurality of substrates 3 are manufactured from one base substrate and connected to each other at the stage of screen printing, or independently manufactured. Refers to a substrate or the like in which a plurality of substrates 3 are aligned and mounted at predetermined positions on a carrier. In the present embodiment, as shown in FIG. 2, the two substrates 3 mounted so as to be aligned with the carrier 4 are referred to as the print target 2, and the whole including the two substrates 3 and the carrier 4 is referred to as the work target 5. explain. Further, the “printed pattern 2P of the print target object 2” refers to a combination of the electrode patterns 3P of the individual substrates 3 constituting the print target object 2 (FIG. 2).

In FIGS. 1, 3 (a), 3 (b) and 4, the screen printing apparatus 1A includes a carry-in unit 12, an object holding / moving mechanism 13 and a carry-out unit 14 on a base 11. A pair of beam members 15 are provided at both ends of the base 11 in the left-right direction (in the X-axis direction) as seen from the operator OP. Each beam member 15 extends in the front-rear direction (in the Y-axis direction) as seen from the operator OP. Between these pair of beam members 15, a mask installation portion 15L composed of a pair of rail members extending in the Y-axis direction and arranged on the left and right is provided. The mask 16 is detachably installed in the mask installation portion 15L in a horizontal posture. The pair of beam members 15 are provided with a squeegee unit 17 that moves above the mask 16 and an imaging unit 18 that moves below the mask 16.

The carry-in section 12, the object holding / moving mechanism 13, and the carry-out section 14 are provided side by side in this order from the left side when viewed from the worker OP. The carry-in unit 12 is composed of a pair of conveyors, and carries in the work object 5 (that is, the print object 2) supplied from the outside. The target holding / moving mechanism 13 receives and holds the work target 5 from the carry-in unit 12, and when the screen printing on the print target 2 is completed, the target 5 is delivered to the carry-out unit 14. The carry-out unit 14 is composed of a pair of conveyors, and carries out the work target 5 received from the target holding / moving mechanism 13 to the outside.

In FIG. 4, the object holding / moving mechanism 13 includes an object holding unit 21 and a moving mechanism unit 22 that moves the object holding unit 21 in the horizontal direction and in the vertical direction. The target holding portion 21 includes a transport portion 31, a lower receiving member 32, and a pair of clampers 33 arranged in the front-rear direction (see also FIGS. 3A and 3B).

The transport unit 31 is composed of a pair of conveyors, transports the work target 5 received from the carry-in unit 12 in the X-axis direction, and positions it at a predetermined position (hereinafter, referred to as “clamp position”) below the mask installation unit 15L. The lower receiving member 32 supports the lower surface of the work object 5 positioned at the clamp position by the transport portion 31. The pair of clampers 33 clamp and hold the work target 5 supported by the lower support member 32 from the Y-axis direction.

In FIGS. 5A, 5B, and 5C, three masks 16 (three types) are prepared corresponding to the pattern to be printed 2P. The opening patterns 40 of these three masks 16 are similar to each other and differ in size. Each mask 16 has a rectangular flat plate shape that extends in an XY plane, and its outer circumference is supported by a frame member 16w.

The three masks 16 consist of a standard mask 16a (FIG. 5 (a)), an enlargement mask 16b (FIG. 5 (b)), and a reduction mask 16c (FIG. 5 (c)). The opening pattern 40 (referred to as the standard opening pattern 41) included in the standard mask 16a is provided in a size corresponding to the pattern to be printed 2P when the print target 2 does not undergo in-plane expansion and contraction deformation. The opening pattern 40 (referred to as the enlarged opening pattern 42) included in the magnifying mask 16b is provided in a size corresponding to the pattern to be printed 2P when the print target 2 is elongated and deformed in the plane. The opening pattern 40 (referred to as a reduced opening pattern 43) included in the reduction mask 16c is provided in a size corresponding to the pattern to be printed 2P when the print target 2 is subjected to in-plane reduction deformation.

Assuming that the enlargement ratio of the standard opening pattern 41 (with reference numeral H) is H = 1.0, the enlargement ratio H of the enlargement opening pattern 42 is H> 1.0, and the enlargement ratio H of the reduction opening pattern 43 is H. <1.0. In the present embodiment, the enlargement ratio of the enlargement opening pattern 42 is H = 1.1, and the enlargement ratio H of the reduction opening pattern 43 is H = 0.9. The enlargement ratio is not limited to the above numerical values, but is determined by the material of the substrate 3 and the numerical selection by the operator. One of the three masks 16 is selected (described later) in the mask installation unit 15L and installed by the operator OP.

The moving mechanism unit 22 positions the object holding unit 21 below the mask 16 installed in the mask installation unit 15L. The carry-in section 12 and the carry-out section 14 form a transport path for the work target 5 that is continuous in the X direction with the transport section 31 of the target holding section 21 (FIG. 3A).

In FIG. 2, each of the two substrates 3 is provided with a pair (two) of substrate-side marks 3m. On the other hand, four mask-side marks 16m corresponding to the four substrate-side marks 3m included in the two substrates 3 (that is, the printed object 5) are provided near each opening pattern 40 of each mask 16 (that is, four mask-side marks 16m). 5 (a), (b), (c)).

By raising the object holding unit 21 (that is, the work object 5), the moving mechanism unit 22 brings the upper surface of the print object 2 into contact with the lower surface of the mask 16 installed in the mask installation unit 15L. When the upper surface of the print object 2 is in contact with the lower surface of the mask 16, the upper surfaces of each of the pair of clampers 33 clamping the print object 2 are also in contact with the lower surface of the mask 16.

FIG. 6 shows a state in which the moving mechanism unit 22 raises the object holding unit 21 to bring the upper surface of the print object 2 into contact with the lower surface of the mask 16. In this state, the printed pattern 2P and the opening pattern 40 overlap, the front clamper 33 abuts on the front region of the opening pattern 40 on the lower surface of the mask 16, and the rear clamper 33 is behind the opening pattern 40 on the lower surface of the mask 16. Contact the area. In FIG. 6, a certain region in front of the opening pattern 40 in the region on the upper surface of the mask 16 is a paste supply region E. The paste Pst is supplied in advance to the paste supply area E.

In FIGS. 3 (a), 3 (b) and 4, the squeegee unit 17 includes a squeegee base 51. The squeegee base 51 extends in the X-axis direction, and both ends are supported by a pair of beam members 15. Two squeegee elevating cylinders 52 are arranged side by side in the Y-axis direction at the center of the squeegee base 51 on the upper surface side in the X-axis direction. Two squeegees 53 are arranged below the two squeegee elevating cylinders 52. Each of the two squeegees 53 is connected to the squeegee elevating cylinder 52. When the two squeegee elevating cylinders 52 operate individually, the two squeegees 53 independently move up and down below the squeegee base 51 accordingly.

Each of the two squeegees 53 extends in the X-axis direction. The two surfaces of the two squeegees 53 facing each other in the Y-axis direction are the scraping surfaces of the paste Pst. The squeegee base 51 is driven by the squeegee base drive mechanism 15A (FIG. 3A) provided on the beam member 15 and moves in the Y-axis direction. By moving the squeegee base 51 in the Y-axis direction, the two squeegees 53 move above the mask 16 in the Y-axis direction.

In FIGS. 3A, 3B and 4, both ends of the X-axis beam 61 extending in the X-axis direction are attached to the lower surface side of the pair of beam members 15. The X-axis beam 61 is provided with a moving plate 62, and the imaging unit 18 is attached to the moving plate 62. The imaging unit 18 includes a lower imaging camera 71 with the imaging field of view facing downward and an upper imaging camera 72 with the imaging field of view facing upward (FIG. 4).

The X-axis beam 61 is driven by the X-axis beam drive mechanism 15B (FIG. 3A) provided on the beam member 15 and moves in the Y-axis direction. The moving plate 62 is driven by the moving plate driving mechanism 61M (FIG. 3A) provided on the X-axis beam 61 and moves in the X-axis direction. The imaging unit 18 moves the X-axis beam 61 with respect to the pair of beam members 15 in the Y-axis direction by the X-axis beam drive mechanism 15B, and moves the X-axis beam 61 with respect to the X-axis beam 61 by the moving plate drive mechanism 61M in the X-axis direction. By the movement of, the lower part of the mask 16 is moved in the horizontal direction.

In FIG. 7, the control device 80 included in the screen printing device 1A carries in the work target 5 by the carry-in unit 12, transports the work target 5 by the transport unit 31 of the target holding unit 21, and holds and moves the work target 5 by the clamper 33. The mechanism unit 22 controls the movement of the object holding unit 21, and the unloading unit 14 controls each operation of unloading the work target 5. The control device 80 also controls the movement of the squeegee base 51 by the squeegee base drive mechanism 15A, the elevation of the squeegee 53 by the squeegee elevating cylinder 52, and the movement of the imaging unit 18 by the X-axis beam drive mechanism 15B and the moving plate drive mechanism 61M. Do.

In FIG. 7, the control device 80 controls each of the imaging by the lower imaging camera 71 and the imaging by the upper imaging camera 72. The image information obtained by the image pickup of the lower image pickup camera 71 and the image information obtained by the image pickup of the upper image pickup camera 72 are input to the control device 80, respectively. A touch panel 81 as an input / output device is connected to the control device 80. The operator OP inputs necessary input to the screen printing device 1A through the touch panel 81, and obtains various information about the screen printing device 1A through the touch panel 81.

In FIG. 1, the component mounting device 1B includes a board transport path 91, a component supply unit 92, and a component mounting mechanism 93. The component supply unit 92 is composed of, for example, a plurality of tape feeders, and each tape feeder supplies the component Bh. The component mounting mechanism 93 includes two mounting heads 93a and a head moving mechanism 93b for moving the two mounting heads 93a. The component supply unit 92 and the component mounting mechanism 93 are controlled by the control unit 94 included in the component mounting device 1B (FIG. 8).

Next, a procedure for executing the screen printing operation by the screen printing device 1A will be described. When the work target 5 is supplied to the carry-in unit 12 of the screen printing device 1A, the carry-in unit 12 carries in the work target 5 and delivers the work target 5 to the transport unit 31. The transport unit 31 transports the work target 5 to the clamp position below the mask installation portion 15L (convey process). When the transport unit 31 transports the work target 5 to the clamp position, the lower receiving member 32 rises to support the lower surface of the work target 5, and a pair of clampers 33 clamp and hold both ends of the work target 5 from the Y-axis direction. (FIG. 9 (a). Arrow A shown in the figure).

When the pair of clampers 33 hold the work target 5, the X-axis beam drive mechanism 15B and the moving plate drive mechanism 61M are interlocked to move the image pickup unit 18, and the lower image pickup camera 71 is made to image the substrate side mark 3 m (imaging). Process). At this time, the lower image pickup camera 71 images the substrate side mark 3m corresponding to one substrate 3 out of the two substrates 3 constituting the print object 2. After the lower imaging camera 71 has imaged the substrate side mark 3m, the lower imaging camera 71 transmits the obtained image information of the substrate side mark 3m to the control device 80.

The control device 80 calculates the degree of deformation of the print object 2 based on the image pickup result of the substrate side mark 3 m transmitted from the lower image pickup camera 71 in the deformation degree calculation unit 80a (FIG. 7) (deformation degree calculation step). ). Here, the "deformation degree of the print object 2" is the degree of deviation between the design value and the measured value with respect to the mounting surface of the print object 2, and the surface area of the print object 2 is longer than the design value or The degree of reduced deformation (expansion and contraction deformation). The degree of deviation between the design value and the measured value with respect to the mounting surface of the print object 2 is determined from a specific side, a diagonal line, a surface area, and the like. Further, the degree of deformation includes the case where the print object 2 is warped and the surface area is reduced on the captured image.

In calculating the degree of deformation of the printed object 2, the control device 80 first obtains a pair of substrates on the substrate 3 based on the image recognition result of the substrate side mark 3m of one substrate 3 transmitted from the lower imaging camera 71. The distance between the side marks 3 m (measured value M) is calculated. Then, the ratio of the calculated measured value M to the design value L of the distance between the pair of substrate side marks 3m is defined as the degree of deformation P (= M / L) of the printed object 2.

As described above, in the present embodiment, the image pickup unit 18 takes an image of the object to be printed (the mark on the substrate side 3 m), and the deformation degree calculation unit 80a is the print target based on the result obtained by the image pickup of the image pickup unit 18. The degree of expansion and contraction deformation of the object 2 is calculated. The method for calculating the degree of deformation P shown here is only an example, and other calculation methods may be used. Further, by imaging the substrate side mark 3m of each of the two substrates 3 to obtain the measured value M between the substrate side marks 3m for each substrate 3 and taking the average of these, the degree of deformation of the printed object 2 P may be calculated.

If the measured value M for the substrate 3 is equal to the design value L when the imaging unit 18 images the substrate side mark 3 m of the substrate 3, the degree of deformation P is P = 1, but the substrate 3 is elongated. When the measured value M exceeds the design value L, the deformation degree P becomes P> 1. Further, when the substrate 3 is reduced and the actually measured value M is less than the design value L, the degree of deformation P is P <1.

The storage unit 80b (FIG. 7) of the control device 80 stores data of the opening pattern 40 (standard opening pattern 41, enlarged opening pattern 42, and reduced opening pattern 43) of each of the three masks 16. The mask selection unit 80c (FIG. 7) compares the degree of expansion / contraction deformation of the print object 2 calculated by the deformation degree calculation unit 80a with the data of the opening pattern 40 of each of the plurality of masks 16 stored in the storage unit 80b. Then, one mask is selected from the plurality of masks 16. Specifically, the mask selection unit 80c is based on which of the three opening patterns 40 included in the mask 16 comes into contact with the print pattern 2P of the print object 2 to minimize the print misalignment. select. That is, the mask selection unit 80c selects one mask 16 from the three masks 16 (standard mask 16a, enlargement mask 16b, and reduction mask 16c) based on the deformation degree P calculated by the deformation degree calculation unit 80a. (Mask selection process).

In the present embodiment, a region of deformation degree based on the enlargement ratio (H = 1.0) of the standard opening pattern 41 (first deformation degree region, for example, 0.95 ≦ P ≦ 1.05). Expansion of the deformation degree region (second deformation degree region. For example, 1.05 <P <1.15) and the reduction opening pattern 43 based on the enlargement ratio (H = 1.1) of the enlargement opening pattern 42. A region of deformation degree (third deformation degree region, for example, 0.85 <P <0.95) is defined based on the ratio (H = 0.9). The mask selection unit 80c selects the opening pattern 40 according to which of these three deformation degree regions the value of the deformation degree P calculated by the deformation degree calculation unit 80a belongs to.

In the above example, when the calculated deformation degree P of the print object 2 is, for example, P = 1.02, the mask selection unit 80c sets the value of the deformation degree P in the first deformation degree region. Therefore, a standard mask 16a having a standard opening pattern 41, which is an opening pattern 40 having an enlargement ratio H of H = 1.0, is selected. Further, when the calculated deformation degree P of the print object 2 is, for example, P = 1.12, the mask selection unit 80c is enlarged because the deformation degree P belongs to the second deformation degree region. A magnifying mask 16b having an magnifying aperture pattern 42 with a ratio H of H = 1.1 is selected. Further, when the calculated deformation degree P of the print object 2 is, for example, P = 0.92, the mask selection unit 80c has an enlargement ratio because the deformation degree P belongs to the third deformation degree region. A reduction mask 16c having a reduction opening pattern 43 in which H is an opening pattern 40 with H = 0.9 is selected. When the calculated deformation degree P of the print object 2 does not belong to any of the first to third deformation degree regions, the mask selection unit 80c indicates that the print object 2 is abnormally deformed. Judge and make an error judgment.

An identifier (for example, a barcode) unique to the mask 16 is provided on the lower surface of each of the three masks 16, and the control device 80 sets the identifier of the mask 16 installed on the mask installation unit 15L as an upper imaging camera. The type of the mask 16 (mask 16 installed in the mask installation portion 15L) is identified by causing the 72 to take an image. When the mask selection unit 80c selects the mask 16, the determination unit 80d (FIG. 7) of the control device 80 is installed in the mask 16 and the mask installation unit 15L selected by the mask selection unit 80c (currently, in the mask installation unit 15L). It is determined whether or not the mask 16 (which is installed) matches. Then, when the selected mask 16 and the mask 16 installed in the mask installation unit 15L do not match (including the case where no mask 16 is installed in the mask installation unit 15L), the control device 80 selects. The mask 16 is notified to the touch panel 81 by the operator OP as the mask 16 to be installed in the mask installation unit 15L (notification step).

In the above notification step, the control device 80 selects, for example, the magnifying mask 16b in the mask selection unit 80c, and when the mask 16 installed in the mask installation unit 15L is not the magnifying mask 16b, the touch panel 81 Is displayed with the character string "Please install an enlarged mask". Instead of displaying such a character string, or in addition to displaying such a character string, the voice "Please install an enlarged mask" is output to a speaker (for example, a speaker attached to the touch panel 81). May be good. As described above, in the present embodiment, the touch panel 81 is a notification unit that notifies the operator OP of the information of the mask 16 selected by the mask selection unit 80c.

When the touch panel 81 notifies the mask 16 selected by the mask selection unit 80c, the operator OP installs the mask 16 notified by the touch panel 81 among the three masks 16 in the mask installation unit 15L (FIG. 10; mask). Installation process). If another mask 16 is installed in the mask installation unit 15L when the mask 16 to be installed is notified by the touch panel 81, the worker OP removes the mask 16 from the mask installation unit 15L and then removes the mask 16. , The mask 16 to be installed is installed in the mask installation portion 15L. After installing the mask 16 to be installed on the mask installation unit 15L, the worker OP performs an operation of completing the mask installation from the touch panel 81.

When the operation input for completing the mask installation is made on the touch panel 81, the control device 80 compares the mask 16 installed in the mask installation unit 15L with the mask 16 selected in the mask selection unit 80c, and confirms that they match. Judge whether or not. Then, if the two do not match, an error is reported to the worker OP through the touch panel 81. On the other hand, when the mask 16 installed in the mask installation unit 15L and the mask 16 selected in the mask selection unit 80c match, the control device 80 sets the X-axis beam drive mechanism 15B and the moving plate drive mechanism 61M. The image pickup unit 18 is moved by interlocking operation, and the upper image pickup camera 72 is made to image the mask side mark 16 m. The image information of the mask side mark 16m captured by the upper imaging camera 72 is sent to the control device 80.

When the upper imaging camera 72 images the mask side mark 16m, the X-axis beam driving mechanism 15B and the moving plate driving mechanism 61M work together to move the imaging unit 18, and the lower imaging camera 71 images the substrate side mark 3m. At this time, the substrate side mark 3m imaged by the lower imaging camera 71 is the substrate side mark 3m of each substrate 3 constituting the print target object 2.

When the lower imaging camera 71 images the substrate side mark 3m of each substrate 3 constituting the print object 2, the control device 80 determines the position of each mask side mark 16m and the position of each substrate side mark 3m based on the imaging result. To grasp. Then, the object holding portion 21 is moved in the horizontal plane by the moving mechanism portion 22 so that the plurality of mask-side marks 16m and the plurality of substrate-side marks 3m substantially coincide with each other in a plan view.

When the plurality of mask-side marks 16m and the plurality of substrate-side marks 3m are made to substantially coincide with each other in the plan view as described above, the control device 80 operates the moving mechanism unit 22 to raise the target holding unit 21. (Arrow B shown in FIG. 9B), the object to be printed 2 is brought into contact with the lower surface of the mask 16 (FIG. 9B. Contact step). As a result, the mask 16 selected by the mask selection unit 80c and the pattern to be printed 2P are overlapped with each other. In this contact step, the moving mechanism unit 22 has the mask 16 and the print object 2 conveyed below the mask installation unit 15L by the transport unit 31 after the mask 16 notified by the touch panel 81 is installed on the mask installation unit 15L. It functions as a contact mechanism for contacting the mask 16 installed on the installation unit 15L.

The screen printing apparatus 1A in the present embodiment has a plurality of masks 16 having opening patterns 40 having different sizes from each other, and a plurality of masks 16 are based on the calculated degree of deformation (deformation degree P) of the print object 2. One mask 16 selected from the masks 16 and the print target 2 (opening pattern 40 and print pattern 2P) are overlapped with each other. Therefore, even when the degree of expansion and contraction deformation of the print object 2 is large, in the contact step, any of the opening patterns 40 (standard opening pattern 41, enlarged opening pattern) having the printed object 2P by the plurality of masks 16 There is a high probability that it can be overlapped with 42 or the reduced opening pattern 43) with an accuracy within the permissible range.

When the print object 2 is brought into contact with the mask 16, the control device 80 deposits the paste Pst on the pattern to be printed 2P via the mask 16 which is in contact with the print object 2 (printing step). In this printing process, first, the squeegee elevating cylinder 52 is operated to lower one of the two squeegees 53 included in the squeegee unit 17 with respect to the squeegee base 51, and the lower end of the squeegee 53 is brought into contact with the mask 16. Then, the squeegee base drive mechanism 15A moves the squeegee base 51 in the Y-axis direction, and slides the squeegee 53 on the opening pattern 40 of the mask 16 in contact with the print object 2. As a result, the squeegee 53 scrapes the paste Pst supplied to the paste supply region E on the mask 16, and the opening pattern 40 is filled with the paste Pst.

In filling the opening pattern 40 with the paste Pst, first, the front squeegee 53 moves rearward from the paste supply region E and slides on the opening pattern 40 (arrow C1 shown in FIG. 11A) to paste. The paste Pst on the supply region E is scraped to the rear region of the opening pattern 40. Then, the rear squeegee 53 moves forward from the rear region of the opening pattern 40 and slides on the opening pattern 40 (arrow C2 shown in FIG. 11B), and the paste Pst is transferred to the paste supply region E. Squeeze.

When the opening pattern 40 is filled with the paste Pst as described above, the paste Pst is deposited on the pattern to be printed 2P, and the printing process is completed. In this printing step, the squeegee unit 17 functions as a printing unit for depositing the paste Pst on the printing object 2 in contact with the mask 16 by the moving mechanism unit 22 which is a contact mechanism via the mask 16.

When the printing process is completed, the moving mechanism unit 22 operates to lower the object holding unit 21 to separate the work object 5 (that is, the print object 2) from the mask 16 (plate separation). Then, after the pair of clampers 33 are opened to release the holding of the work target 5, the transport unit 31 and the carry-out unit 14 operate in conjunction with each other to carry out the work target 5 to the downstream process side (delivery process).

When the screen printing device 1A carries out the work target 5, the board transfer path 91 of the component mounting device 1B receives the carried-out work target 5. Then, the substrate transport path 91 transports the work target 5 and positions it at a predetermined work position. When the work object 5 is positioned at the work position, the component supply unit 92 supplies the component Bh to a predetermined position, and each mounting head 93a is driven by the head moving mechanism 93b to drive the component supply unit 92 and the print object 2 ( It reciprocates between the two substrates 3). In this reciprocating movement, each mounting head 93a picks up the component Bh supplied by the component supply unit 92 and mounts it on the print target object 2.

In FIG. 8, the control unit 94 of the component mounting device 1B includes a component mounting data storage unit 94a, and the component mounting data storage unit 94a has the component mounting positions on the two substrates 3 constituting the print target object 2. Data (part mounting data) is stored in advance. The control unit 94 mounts the component Bh on the print target object 2 (board 3) based on the component mounting data stored in the component mounting data storage unit 94a. That is, the component mounting device 1B mounts the component Bh on the print target 2 on which the paste Pst is printed by the screen printing device 1A based on the component mounting data stored in advance.

In the component mounting line 1, the information on the deformation degree P (the degree of expansion and contraction deformation of the print object 2) of the print object 2 calculated by the deformation degree calculation unit 80a of the screen printing device 1A is transmitted to the component mounting device 1B. It has become so. The component mounting device 1B is the current (that is, component mounting data) based on the information of the deformation degree P of the print object 2 sent from the screen printing device 1A in the correction unit 94b (FIG. 8) of the control unit 94. It is determined whether or not the component mounting data (stored in the storage unit 94a) should be corrected, the component mounting data is corrected if necessary, and the component Bh is printed on the object to be printed 2 based on the corrected component mounting data. Attach to.

Here, the above-mentioned "when necessary" refers to a case other than the case where the deformation degree P calculated by the deformation degree calculation unit 80a of the screen printing apparatus 1A is P = 1. As a result, even if the print object 2 is stretched and deformed, the displacement of the component Bh mounted on the print object 2 by the component mounting device 1B from the regular position is small, and the component has high accuracy. It can be installed.

As described above, in the present embodiment, the component mounting device 1B corrects the component mounting data based on the degree of expansion and contraction deformation of the print object 2 calculated by the deformation degree calculation unit 80a of the screen printing device 1A. It is equipped with.

As described above, in the component mounting line 1 of the present embodiment, the screen printing device 1A has a plurality of masks 16 having opening patterns 40 having different sizes from each other, and the calculated degree of deformation of the print object 2 is calculated. One mask 16 selected from a plurality of masks 16 based on (deformation degree P) and a print target 2 (opening pattern 40 and print pattern 2P) are overlapped with each other. Therefore, even when the degree of expansion and contraction deformation of the print object 2 is large, there is a high probability that the pattern to be printed 2P can be overlapped with the opening pattern 40 of the mask 16 with an accuracy within an allowable range, and printing defects occur. Hateful.

Although the embodiments of the present invention have been described so far, the present invention is not limited to those shown in the above-described embodiments. For example, in the above-described embodiment, the plurality of masks 16 have an opening pattern 40 (magnification ratio H = 1) having a size corresponding to the pattern to be printed 2P when the print object 2 is not stretched and deformed in the plane. One having an opening pattern 40 (magnification ratio H> 0) having a size corresponding to the pattern to be printed 2P when the print target 2 has in-plane elongation deformation, and one to be printed. It was a combination of one having an opening pattern 40 (magnification ratio H <0) of a size corresponding to the print pattern 2P when the in-plane reduction deformation occurred in 2, but this is only an example. The opening pattern 40 of the mask 16 can be combined in various sizes.

Further, in the mask installation process of the above-described embodiment, the worker OP manually installs the mask 16 on the mask installation portion 15L, but a mask installation mechanism that operates under the control of the control device 80 is provided. The mask installation mechanism may be provided to install the mask 16 on the mask installation portion 15L.

Provided are a screen printing apparatus and a component mounting line in which printing defects are unlikely to occur even when the degree of expansion and contraction deformation of the printing object is large.

1 Parts mounting line 1A Screen printing device 1B Parts mounting device 2 Printed object 2P Printed pattern 15L Mask installation unit 16 Mask 18 Imaging unit 40 Opening pattern 80a Deformation calculation unit 80b Storage unit 80c Mask selection unit 80d Judgment unit 81 Touch panel ( Notification unit)
94b Correction part Pst paste Bh parts

Claims (7)

A screen printing device that prints paste on the pattern to be printed on the object to be printed.
Standard masks, magnifying masks, and reduction masks that have different size aperture patterns,
A mask installation unit on which one of the standard mask, the enlargement mask, and the reduction mask is installed,
An imaging unit that captures the image to be printed ,
The results obtained by imaging the pre-Symbol imaging unit, the standard mask, the larger mask, the standard mask based on the data of the opening pattern, respectively the reduced mask having the enlarged mask, from among the reduced mask A mask selection section that selects one mask,
It is provided with a determination unit for determining whether or not the mask selected in the mask selection unit and the mask installed in the mask installation unit match .
The opening pattern of the standard mask is provided in a size corresponding to the pattern to be printed when the object to be printed is not stretched or deformed.
The opening pattern of the magnifying mask is provided in a size corresponding to the pattern to be printed when the object to be printed is stretched and deformed.
The opening pattern of the reduction mask is provided in a size corresponding to the pattern to be printed when the print target is reduced and deformed.
The mask selection unit is characterized in that an error determination is made when the degree of deformation of the print object does not belong to any of the deformation degree regions defined for each of the standard mask, the enlargement mask, and the reduction mask. Screen printing device. The screen printing apparatus according to claim 1, further comprising a storage unit that stores the data of the opening pattern. The screen printing apparatus according to claim 1 or 2 , wherein the mask selection unit includes a notification unit that notifies the selected mask. A screen printing device that prints paste on the pattern to be printed on the object to be printed, and a component mounting device that mounts parts on the printing object on which the paste is printed by the screen printing device based on the component mounting data stored in advance. It is a component mounting line that is equipped
The screen printing device is
Standard masks, magnifying masks, and reduction masks that have different size aperture patterns,
A mask installation unit on which one of the standard mask, the enlargement mask, and the reduction mask is installed,
An imaging unit that captures the image to be printed ,
The results obtained by imaging the pre-Symbol imaging unit, the standard mask, the larger mask, the standard mask based on the data of the opening pattern, respectively the reduced mask having the enlarged mask, from among the reduced mask A mask selection section that selects one mask,
A determination unit for determining whether or not the mask selected in the mask selection unit and the mask installed in the mask installation unit match is provided .
The opening pattern of the standard mask is provided in a size corresponding to the pattern to be printed when the object to be printed is not stretched or deformed.
The opening pattern of the magnifying mask is provided in a size corresponding to the pattern to be printed when the object to be printed is stretched and deformed.
The opening pattern of the reduction mask is provided in a size corresponding to the pattern to be printed when the print target is reduced and deformed.
The mask selection unit is characterized in that an error determination is made when the degree of deformation of the print object does not belong to any of the deformation degree regions defined for each of the standard mask, the enlargement mask, and the reduction mask. Parts mounting line to be used. The component mounting line according to claim 4, further comprising a storage unit that stores the data of the opening pattern. The component mounting line according to claim 4 or 5 , wherein the screen printing device includes a notification unit that notifies the mask selected by the mask selection unit. Based on the results obtained by imaging the pre-Symbol imaging unit, a rate calculating unit for calculating the degree of expansion and contraction deformation of the printing object,
According to any one of claims 4 to 6, characterized in that and a correcting unit for correcting the component mounting data based on the degree of expansion and contraction deformation before Symbol the printing medium calculated in rate calculating section Parts mounting line.

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