JP4540925B2 - Paste container for screen printing - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paste container used in screen printing for printing paste such as cream solder or conductive paste on a substrate.
[0002]
[Prior art]
In an electronic component mounting process, screen printing is used as a method for printing paste such as cream solder or conductive paste on a substrate. In this method, a mask plate in which pattern holes are formed according to a printing target portion is set on a substrate, and paste is printed on the substrate through the pattern holes of the mask plate by squeezing.
[0003]
As a screen printing squeezing method, a method using a sealed squeegee head is known. Unlike normal screen printing, this method uses a squeegee head in which the paste is stored, instead of supplying the paste directly onto the mask plate. In this method, the paste in the squeegee head is pressed through the paste contact surface by pressing the paste in the squeegee head with the paste contact surface provided on the lower surface of the squeegee head in contact with the mask plate. Is pushed in. Then, by sliding the squeegee head on the mask plate, each pattern hole is sequentially filled with paste.
[0004]
[Problems to be solved by the invention]
However, screen printing using the above-described conventional sealed squeegee head has the following problems. In the sealed squeegee head, the paste is supplied in a state of being stored in a dedicated container such as a cartridge in the squeegee head, unlike the conventional printing method in which the paste is directly supplied onto the mask plate. For this reason, when the paste is consumed in the process of continuing the printing operation, the paste is replenished by replacing with a new dedicated container.
[0005]
However, the dedicated container used for the above-mentioned conventional sealed squeegee head is a container manufactured by molding a resin into an elongated box shape, so that the running cost is high and it remains inside and remains unused. Residual paste to be discarded is generated, and resources are wasted. This has been a factor in increasing the cost of screen printing. In screen printing, it is necessary to perform stirring for adjusting the viscosity of the paste as a printing preparation operation, but in a box-shaped dedicated container, the paste contained inside can be stirred from the outside by a simple method. However, there is a problem that it is difficult to easily adjust the viscosity.
[0006]
Therefore, an object of the present invention is to provide a paste container for screen printing that can supply a paste at low cost and can easily adjust viscosity.
[0007]
[Means for Solving the Problems]
The paste container for screen printing according to claim 1 includes a paste reservoir that contains the paste therein, and a paste that is moved downward from the paste reservoir by pressurizing the paste in the paste reservoir with a pressure plate. A pressure space, a printing space that accommodates the paste that has moved downward and is brought into contact with the surface of the mask plate through an opening formed in the lower surface, and front and rear walls in the squeezing direction of the printing space, In a squeegee head for screen printing having two opposing sliding contact portions that are in sliding contact with the upper surface, the squeegee head for screen printing is detachably held by a container holding portion provided in the paste reservoir, and is pressurized by the pressurizing means. A replaceable paste container for supplying paste contained in the interior to the lower printing space, which is made of a flexible film material. A concave portion, a hook-like portion formed by projecting from the outer peripheral portion of the concave portion in a direction perpendicular to the concave direction, and an opening surface of the concave portion being closed by being attached to the hook-like portion A film-shaped cover sheet member, and the concave portion includes a contact surface with which the pressure plate contacts from above, a first surface extending vertically downward from both ends of the contact surface, and both first It has a second surface that extends from the lower end of the surface so as to incline toward the outside, and the flange-like portion extends in the horizontal direction at the lower end, and the first surface and the second surface are: It is connected via a bend line that is bent in the inner direction of the concave portion in the horizontal direction, and paste is accommodated in a space enclosed by the concave portion and the cover sheet member , and the contact surface When the equally distributed load from above is applied to the pressure plate, the contact surface is lowered. The first surface and the second surface are deformed so that the folding line is displaced inward, and when the contact surface is further pushed down, the first surface and the second surface are substantially flat. Ru is folded to a state close to.
[0008]
According to the present invention, there is provided an exchangeable paste container that is detachably held in a container holding part provided in the paste storage part, and that supplies the paste contained in the inside by being pressurized by the pressurizing means to the lower printing space. An elongated concave portion made of a flexible film-like material, a hook-like portion formed by projecting from the outer periphery of the concave portion in a direction perpendicular to the concave direction, and affixed to the hook-like portion The film-shaped cover sheet member that closes the opening surface of the concave portion is configured to accommodate the paste in the space enclosed by the concave portion and the cover sheet member. Is a contact surface that contacts from above, a first surface that extends vertically downward from both ends of the contact surface, and a slanted portion that extends outward from the lower ends of both first surfaces, and has a bowl-shaped portion at the lower end. a second surface which is provided to protrude in the horizontal direction, the first surface The second surface is connected via a fold line that is bent in the horizontal direction toward the inside of the concave portion, and the paste is accommodated in a space enclosed by the concave portion and the cover sheet member. When an evenly distributed load from above is applied to the contact surface by the pressure plate, the contact surface is lowered and the first surface and the second surface are deformed so that the folding line is displaced inward. further depressing the contact surface, the first and second surfaces is folded up approximately nearly flat state Runode, no residual paste due to the concave portion is crushed irregular shapes, pastes at low cost In addition, the viscosity can be easily adjusted by stirring the paste contained inside from the outside.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. 1 is a front view of a screen printing apparatus according to an embodiment of the present invention, FIG. 2 is a side view of the screen printing apparatus according to an embodiment of the present invention, and FIG. 3 is a screen printing apparatus according to an embodiment of the present invention. FIG. 4 is a side view of the squeegee head of the screen printing apparatus according to the embodiment of the present invention, and FIG. 5 is a partial perspective view of the squeegee head of the screen printing apparatus according to the embodiment of the present invention. FIG. 6 is a partial perspective view of the paste reservoir of the screen printing apparatus according to the embodiment of the present invention, FIG. 7 is an explanatory view of the structure of the paste container of the screen printing apparatus according to the embodiment of the present invention, and FIG. FIG. 9 is an explanatory view of the operation of the screen printing apparatus according to the embodiment of the present invention. FIG.
[0010]
First, the structure of the screen printing apparatus will be described with reference to FIGS. 1 and 2, the substrate positioning unit 1 is configured by disposing a substrate holding unit 2 on a moving table (not shown). The substrate 3 to be screen-printed is held by a clamper 4 of the substrate holding unit 2, and the substrate 3 held by the substrate holding unit 2 is positioned in the horizontal direction and the vertical direction by driving a moving table (not shown). .
[0011]
A screen mask 10 is disposed above the positioning unit 1. The screen mask 10 is configured by mounting a mask plate 12 on a holder 11, and a pattern hole 12 a corresponding to a printing portion of a substrate 3 to be printed is opened in the mask plate 12.
[0012]
A squeegee head 13 is disposed on the screen mask 10 so as to be movable up and down by a head lifting unit 20. The head elevating unit 20 includes a cylinder 22 erected on a base member 21, and a squeegee head 13 is coupled to a lower end portion of a rod 22 a of the cylinder 22 via a coupling member 15. By driving the cylinder 22, the squeegee head 13 moves up and down with respect to the mask plate 12. The head elevating unit 20 is an elevating unit that elevates and lowers the squeegee head 13 with respect to the screen mask 10.
[0013]
Sliders 23 are fixed to both ends of the lower surface of the base member 21 of the head elevating unit 20, and the sliders 23 are slidably fitted to guide rails 24 disposed on the upper surface of the frame 25. A nut member 26 is coupled to the lower surface of the base member 21, and a feed screw 27 screwed into the nut 26 is rotationally driven by a motor 28.
[0014]
By driving the motor 28, the base member 21 moves horizontally, and thus the squeegee head 13 coupled to the head lifting / lowering unit 20 also moves horizontally. By driving the motor 28 with the squeegee head 13 lowered, the squeegee head 13 moves horizontally on the mask plate 12. That is, the motor 28, the feed screw 27 and the nut 26 are moving means for moving the squeegee head 13 horizontally on the mask plate 12.
[0015]
The squeegee head 13 is provided with a printing unit 14 that contacts the surface of the mask plate 12 and fills the pattern holes 12a with the cream solder 5 as a paste. As shown in FIG. 1, the printing unit 14 is divided into an upper part 14A and a lower part 14B. The upper part 14A and the lower part 14B are elongated block-like members in the width direction of the mask plate 12, respectively, as shown in FIG. The main body upper part 30A and the main body lower part 30B are provided.
[0016]
The length dimensions of the main body upper part 30A and the main body lower part 30B are set so as to cover the width dimension of the substrate 3 to be printed as shown in FIG. The main body upper portion 30A and the main body lower portion 30B are rotatably coupled via the hinge portion 17 (see also FIG. 5), and the main body lower portion 30B and the main body upper portion 30B are inverted by inverting the main body upper portion 30A with respect to the main body lower portion 30B. 30A can be opened.
[0017]
As shown in FIG. 3, the main body upper portion 30A is mainly composed of a frame-like member having a recess 30a formed therein (see FIG. 6), and the cartridge 31 in which the cream solder 5 is stored is replaceable in the recess 30a. It is attached to. The cartridge 31 is an exchangeable container formed by molding a flexible film-like material into a container shape, and has a shape in which the lower part is opened in the mounting posture. The cartridge 31 is mounted on the main body upper portion 30A by a pressing plate 32 provided with a large number of apertures 32a (see also FIG. 5). The main body upper part 30 </ b> A and the cartridge 31 mounted in the recess 30 a of the main body upper part 30 </ b> A constitute a paste reservoir provided in the squeegee head 13.
[0018]
Here, with reference to FIG. 7, the structure of the cartridge 31 which is a paste container is demonstrated. The cartridge 31 is manufactured by molding a flexible film material such as a resin film. As shown in FIG. 7A, the cartridge 31 has an elongated concave portion 31a corresponding to the size and shape of the concave portion 30a of the main body upper portion 30A. Is the subject. FIG. 7B shows a cross section of the cartridge 31. The concave portion 31a has a flat bottom shape in which the width B of the opening is larger than the depth D, and has a cross-sectional shape in which a plurality of planes are connected by bending lines. Details of the cross-sectional shape will be described later.
[0019]
From the outer peripheral part of the recessed part 31a, a hook-like part 31b projecting in a direction orthogonal to the recessed direction (horizontal direction in the mounting posture) is formed. As will be described later, the bowl-shaped portion 31b functions as a holding surface when the cartridge 31 is mounted on the main body upper portion 30A. An adhesive sheet 40 having an adhesive layer on both sides is attached to the back surface of the bowl-shaped part 31b, and the bowl-like part 31b is attached and locked to the main body upper part 30A by the adhesive sheet 40.
[0020]
A cover sheet member 41 made of a resin thin film is adhered to the entire surface of the hook-shaped portion 31b (the surface opposite to the concave direction) except for a portion of bending allowance when the main body 30A is mounted. . By sticking the cover sheet member 41 to the bowl-shaped portion 31b, the opening of the concave portion 31a is closed, and a closed paste containing space 31c is formed between the concave portion 31a and the cover sheet member 41. The The cream solder 5 is injected into the paste containing space 31c in a state where the cover sheet member 41 is partially peeled off, and the cover sheet member 41 is entirely adhered to the bowl-shaped portion 31b or in an open state. After the cream solder 5 is injected into the paste containing space 31c, the cover sheet member 41 is adhered to the entire surface, whereby the cream solder 5 is accommodated in the cartridge 31 in a sealed state.
[0021]
Next, functions of the paste reservoir and the printing space in the squeegee head 13 will be described. As shown in FIG. 3, a pressurizing plate 29 for pressurizing the cream solder 5 is fitted on the upper surface side (the upper surface side in the mounted state) of the cartridge 31 mounted in the recess 30a. The pressure plate 29 is in contact with the rod 16a of the cylinder 16 disposed above, and by driving the cylinder 16, the pressure plate 29 presses the cartridge 31 from above. By pressing the pressure plate 29 downward by the cylinder 16, the cartridge 31 made of a flexible film material is easily bent and deformed, and the cream solder 5 in the cartridge 31 is pressurized to open the hole of the press plate 32. It is pushed downward through the part 32a. The cylinder 16 and the pressure plate 29 serve as a pressurizing unit that pressurizes the cream solder 5.
[0022]
An adhesion preventing plate 33 is provided in the main body lower portion 30B in contact with the pressing plate 32. The adhesion preventing plate 33 is provided with a circular opening 33a at a position corresponding to the opening 32a of the pressing plate 32 (see also FIG. 5). The adhesion preventing plate 33 prevents the cream solder 5 pushed downward from the cartridge 31 from adhering to a portion other than the opening portion 32 a on the lower surface of the pressing plate 32.
[0023]
Similar to the adhesion prevention plate 33, a diaphragm plate 34 provided with a large number of apertures 34a is attached to the bottom of the lower body portion 30B. When the cream solder 5 is pushed out by the cylinder 16, it passes through the opening portions 32 a, 33 a of the pressing plate 32 and the adhesion preventing plate 33 and the opening portion 34 a of the throttle plate 34 and moves downward. The extruded cream solder 5 is a space formed below the lower body portion 30B, that is, two sliding contact portions 36A and 36B disposed opposite to each other in the inner diagonal direction on the lower surface of the lower body portion 30B, It reaches a printing space 35 surrounded by a lower surface of the main body lower portion 30B and a closing plate 36C (see FIG. 5) provided at both end portions of the main body lower portion 30B.
[0024]
The sliding contact portions 36 </ b> A and 36 </ b> B form front and rear walls in the squeezing direction of the printing space 35, and the lower end portions of the sliding contact portions 36 </ b> A and 36 </ b> B are in sliding contact with the surface of the mask plate 12 when the squeegee head 13 is lowered. The printing space 35 accommodates the pressurized cream solder 5, and the cream solder 5 is brought into contact with the surface of the mask plate 12 through an opening formed on the lower surface (an opening between the sliding contact portions 36A and 36B). . During the printing operation, the sliding contact portions 36A and 36B slide on the upper surface of the mask plate 12 by the movement of the squeegee head 13, and perform squeezing that scrapes the cream solder 5 in the printing space 35.
[0025]
By pressing down the pressure plate 29 to pressurize the cream solder 5 in the cartridge 31, the cream solder 5 moves through the press plate 32, the adhesion prevention plate 33, and the diaphragm plate 34 into the printing space 35. In the middle of the movement path of the cream solder 5, the cross-sectional area is narrowed by a large number of small openings 32a, 33a, 34a. The viscosity of the solder 5 is lowered and modified to a property suitable for screen printing.
[0026]
Here, with reference to FIGS. 4 and 5, the coupling / separation and opening / closing operation of the upper part 14A and the lower part 14B of the printing unit 14 will be described. As described above, the squeegee head 13 is divided into the upper part 14A including the cartridge 31 and the lower part 14B including the printing space 35. The upper part 14A and the lower part 14B can be separated and opened and closed by the hinge part 17. It is hinged.
[0027]
As shown in FIG. 4A, a hinge plate 17a provided with pins 17b is fixed to the side surface of the upper portion 14A, and a hinge plate 17c provided with pin grooves 17d is fixed to the upper surface of the lower portion 14B. The hinge plate 17c is partially cut away, and a part of the upper portion of the pin groove 17d is opened. When the upper part 14A is mounted on the lower part 14B, as shown in FIG. 4B, the pin 17b is fitted into the pin groove 17d from the notch of the hinge plate 17c. Accordingly, the upper portion 14A is mounted on the upper surface of the lower portion 14B at the correct position.
[0028]
In this state, the upper portion 14A is inverted with the pin 17b as a fulcrum, so that the upper portion 14A is inverted and separated from the lower portion 14B as shown in FIG. 4C. That is, the upper part 14A can be opened and closed with the upper part 14A being pivotally supported by the lower part 14B. As a result, as shown in FIG. 5, the upper portion 14A is held in a posture in which the pressing plate 32 mounted on the main body upper portion 30A faces upward, so that the cartridge 31 in the recess 30a can be attached and detached.
[0029]
FIG. 6 is an exploded view of the upper portion 14A held in such a posture. The main body upper part 30A is a frame-like member with the concave part 30a directed as described above, and the cartridge 31 is detachably held by the main body upper part 30A with the concave part 31a fitted in the concave part 30a. The main body upper portion 30A serves as a container holding portion that detachably holds a cartridge 31 that is a paste container.
[0030]
When the cartridge 31 is mounted, the flange portion 31b is pressed against the outer surface of the main body upper portion 30A by edge portions 32b provided by bending both ends of the pressing plate 32 downward. At this time, the hook-shaped part 31b is stuck to the main body upper part 30A by the adhesive sheet 40 (refer FIG. 7). The adhesive sheet 40 serves as a locking unit that locks and holds the cartridge 31 on the main body upper portion 30A.
[0031]
Next, the cross-sectional shape of the concave portion 31a of the cartridge 31 and the deformation behavior of the concave portion 31a when the cream solder is extruded will be described with reference to FIG. FIG. 8 schematically shows a cross-sectional shape of the concave portion 31a in a posture in which the cartridge 31 is mounted on the squeegee head 13 (the opening surface is downward) by a straight line. As shown in FIG. 8A, the concave portion 31a includes a contact surface 31d with which the pressure plate 29 contacts in the mounted state, and a first portion that is connected to both ends of the contact surface 31d and extends vertically downward. Surface 31e (width B) and a second surface (width A) 31g connected to the first surface 31e and inclined outward. The first surface 31e and the second surface 31g are connected to each other via a bending line 31f provided by bending in the horizontal direction toward the inner side of the concave portion 31a. That is, a crease that is bent inward in advance is provided on the side surface of the concave portion 31a.
[0032]
FIGS. 8B and 8C show the deformation behavior when the concave portion 31a is crushed. As shown in FIG. 8 (b), when allowed to act uniformly distributed load from above by the pressing plate 29 to the abutment surface 31d, in advance from the side surface of the above folds are provided, the contact surface 31d is lowered At the same time, the first surface 31e and the second surface 31g are deformed so that the folding line 31f is displaced inward.
[0033]
When the abutting surface 31d is further pushed down, the first surface 31e and the second surface 31g are folded up to a state that is almost flat as shown in FIG. 8C. The position of the fold line 31h at this time is generally not coincident with the original fold line 31f, and the widths a and b shown in FIG. 8C are positions that satisfy the relationship a + b = A + B. . Thus, by providing the folding line 31f in advance, the first surface 31e and the second surface 31g are not deformed in the direction of swelling outward in the crushing process, and the irregular deformation deviates from the desired deformation behavior. Can be prevented. In addition, by setting the position of the fold line 31f to a position where a + b = A + B is satisfied in advance, the container cross-sectional shape can be designed so that the positions of the fold line 31f and the fold line 31h coincide.
[0034]
Next, the screen printing operation will be described with reference to FIG. In screen printing, as shown in FIG. 9A, the squeegee head 13 is lowered with respect to the mask plate 12 in a state where the main body upper portion 30A on which the cartridge 31 and the pressing plate 32 are mounted is coupled to the main body lower portion 30B. The sliding contact portions 36A and 36B are brought into contact with the mask plate 12 (see arrow a). Then, the cartridge 31 is pressed by the cylinder 16 through the pressure plate 29 in the upper main body 30A. As a result, the cream solder 5 is pushed out of the cartridge 31 and descends into the print space 35 through the openings 32a, 33a, 34a (see FIG. 3) (see arrow b).
[0035]
Then, the squeegee head 13 with the cream solder 5 filled in the printing space 35 is slid on the mask plate 12 (see arrow c). As a result, the rolling flow of the cream solder 5 occurs due to the cream solder 5 being scraped by the sliding contact portions 36A and 36B in the printing space 35 (see arrow d), and the cream solder 5 is moved to the sliding contact portions 36A and 36B. The pattern hole 12a of the mask plate 12 is filled through the opening therebetween. Then, by further moving the squeegee head 13, the cream solder 5 is sequentially filled in each pattern hole 12a.
[0036]
By repeatedly executing the above squeezing operation, the cream solder 5 in the printing space 35 and the cartridge 31 is consumed. Accordingly, as shown in FIG. 9B, the concave portion 31 a of the cartridge 31 is bent and deformed by the pressing of the pressure plate 29, so that the extrusion of the cream solder 5 in the cartridge 31 is continued. Then, as shown in FIG. 9C, when the concave portion 31a is bent and is almost crushed, the cartridge 31 is in a solder consumption state, and thereafter replaced with a new cartridge.
[0037]
In the process of extruding the cream solder 5, the concave portion 31 a of the cartridge 31 is provided with a fold line in advance as shown in FIG. 8, so that it is crushed into a predetermined shape by pressing from above. Therefore, there is no residue of the cream solder 5 due to the concave portion 31a being crushed into an irregular shape, and there is no waste of discarding the cream solder 5 that is no longer usable.
[0038]
As described above, the squeegee head 13 shown in the present embodiment can greatly reduce the running cost by using a container having a simple and inexpensive structure without using a conventional expensive dedicated container. . Moreover, the amount of residual solder that is discarded without being used is greatly reduced, and resource saving is realized.
[0039]
In screen printing, stirring for adjusting the viscosity of the paste needs to be performed as a printing preparation operation, but the cartridge 31 of the present embodiment uses a container made of a flexible film material. Therefore, the cream solder 5 accommodated in the inside can be easily stirred from the outside as needed, and the viscosity can be easily adjusted before the mounting.
[0040]
【The invention's effect】
According to the present invention, there is provided an exchangeable paste container that is detachably held in a container holding part provided in the paste storage part, and that supplies the paste contained in the inside by being pressurized by the pressurizing means to the lower printing space. An elongated concave portion made of a flexible film-like material, a hook-like portion formed by projecting from the outer periphery of the concave portion in a direction perpendicular to the concave direction, and affixed to the hook-like portion The film-shaped cover sheet member that closes the opening surface of the concave portion is configured to accommodate the paste in the space enclosed by the concave portion and the cover sheet member. Is a contact surface that contacts from above, a first surface that extends vertically downward from both ends of the contact surface, and a slanted portion that extends outward from the lower ends of both first surfaces, and has a bowl-shaped portion at the lower end. a second surface which is provided to protrude in the horizontal direction, the first surface The second surface is connected via a fold line that is bent in the horizontal direction inward of the concave portion, and the paste is contained in a space enclosed by the concave portion and the cover sheet member. When an evenly distributed load from above is applied to the contact surface by the pressure plate, the contact surface is lowered and the first surface and the second surface are deformed so that the folding line is displaced inward. further depressing the contact surface, the first and second surfaces is folded up approximately nearly flat state Runode, no residual paste due to the concave portion is crushed irregular shapes, pastes at low cost In addition, the viscosity can be easily adjusted by stirring the paste contained inside from the outside.
[Brief description of the drawings]
FIG. 1 is a front view of a screen printing apparatus according to an embodiment of the present invention. FIG. 2 is a side view of a screen printing apparatus according to an embodiment of the present invention. Fig. 4 is a partial sectional view of a squeegee head of the apparatus. Fig. 4 is a side view of a squeegee head of a screen printing apparatus according to an embodiment of the invention. FIG. 6 is a partial perspective view of a paste storage part of the screen printing apparatus according to the embodiment of the present invention. FIG. 7 is an explanatory diagram of the structure of the paste container of the screen printing storage according to the embodiment of the present invention. FIG. 9 is an explanatory diagram of a cross-sectional shape of a paste container of a screen printing storage according to an embodiment of the present invention. FIG. 9 is an operation explanatory diagram of a screen printing apparatus according to an embodiment of the present invention.
3 Substrate 5 Cream solder 12 Mask plate 12a Pattern hole 13 Squeegee head 14A Upper part 14B Lower part 16 Cylinder 20 Head lifting / lowering part 29 Pressure plate 30A Main body upper part 30B Main body lower part 31 Cartridge 31a Concave part 31b Gutter part 31e First surface 31f Bending line 31g Second surface 32 Presser plate 35 Print space 36A, 36B Sliding contact portion

Claims (1)

A paste reservoir for storing the paste therein, a pressure means for moving the paste downward from the paste reservoir by pressurizing the paste in the paste reservoir with a pressure plate, and a lower surface for storing the paste moved downward A printing space that is brought into contact with the surface of the mask plate through the opening formed on the surface, and two opposed sliding contact portions that form front and rear walls in the squeezing direction of the printing space and that are in sliding contact with the upper surface of the mask plate; A squeegee head for screen printing, comprising: a paste holder which is detachably held in a container holding part provided in the paste storage part, and which is pressurized by the pressurizing means and accommodated in the lower printing space. An exchangeable paste container to be supplied, which has an elongated concave portion made of a flexible film-like material, and a concave direction directly from the outer peripheral portion of the concave portion. And a film-like cover sheet member that closes the opening surface of the concave portion by being attached to the hook-shaped portion, and the concave portion is An abutting surface with which the pressure plate abuts from above, a first surface extending vertically downward from both ends of the abutting surface, and a slant extending outward from the lower ends of both first surfaces, A fold line provided by bending the first surface and the second surface in the horizontal direction toward the inner side of the concave portion. The paste is contained in a space enclosed by the concave portion and the cover sheet member ,
When an evenly distributed load from above is applied to the abutment surface by the pressure plate, the abutment surface is lowered, and the folding line is displaced inward on the first surface and the second surface. deformed, the the abutment surface further pushing down, the first surface and the second surface paste container for screen printing, characterized in Rukoto folded to almost nearly flat state.

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