JP2016172385A - Screen printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable reduction of work time and automation of ink movement during replacement of a stencil frame body.SOLUTION: A frame 3 is not provided in at least one side of a stencil upper surface of a stencil 1, on which an ink 4 is placed, when viewed in a moving direction X of a squeegee 5. In replacement of a stencil frame body, one end side end part of a first stencil frame body A, which is an end part of the first stencil frame body A when viewed in the squeegee moving direction X, is placed in contact with one end side end part of a second stencil frame body B, which is an end part of the second stencil frame body B when viewed in the squeegee moving direction X. Then, the ink 4 remaining on the stencil upper surface of the first stencil frame body A is moved to the stencil upper surface of the second stencil frame body B by the squeegee 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a screen printing apparatus that moves ink with a squeegee on a stencil.

  Conventionally, as this type of screen printing apparatus, for example, there is one described in Patent Document 1. In the screen printing apparatus described in Patent Document 1, a stencil frame body is configured by holding a stencil in which a hole through which ink passes is formed by a frame. The frame is a frame having a rectangular opening, and four sides of the surface of the stencil to which ink is supplied are surrounded by the frame.

JP-A-6-106706

  By the way, when the stencil frame A used for printing the printing object A is replaced with the stencil frame B used for printing the printing object B, first, the stencil frame is removed from the screen printing apparatus automatically or manually. .

  However, since the four sides of the stencil on which ink is supplied are surrounded by a frame and the frame is an obstacle, it is difficult to move the ink on the stencil to the outside of the stencil with a squeegee. Therefore, the ink remaining on the stencil of the stencil frame A cannot be moved to the stencil of the stencil frame B with a squeegee, and the ink movement cannot be automated.

  Thus, after the stencil frame body is attached and detached, the operator manually scrapes the ink remaining on the stencil frame A and moves the ink to the stencil frame B stencil. Accordingly, there is a problem that it takes a long time to replace the stencil frame.

  SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to shorten the work time when replacing a stencil frame and to automate ink movement when replacing the stencil frame.

  In order to achieve the above object, according to the first aspect of the present invention, the stencil (1) having the holes (11) through which the ink (4) passes is held by the frame (3), and one surface of the stencil is formed. In the screen printing apparatus in which the ink supplied on the stencil is moved by the squeegee (5) on one surface of the stencil, at least one side of the squeegee moving direction (X) on the one surface of the stencil is a frame. Is not provided.

  According to this, using the part of the stencil that has no frame, move the ink remaining on the stencil of the stencil frame before replacement to the stencil of the stencil frame after replacement with a squeegee. This makes it easier to move the ink. Therefore, it is possible to shorten the work time when replacing the stencil frame. Further, the ink movement can be automated.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

It is a figure which shows the process of the stencil frame replacement | exchange operation | work in the screen printing apparatus which concerns on one Embodiment of this invention. It is II sectional drawing of Fig.1 (a). It is sectional drawing which shows the process of FIG.1 (c).

  An embodiment of the present invention will be described.

  As shown in FIG. 1, the screen printing apparatus performs printing on a printing object having different printing specifications by exchanging the first stencil frame A and the second stencil frame B.

  As shown in FIGS. 1 to 3, the first stencil frame A is made of a material (for example, a thin plate rectangular stencil 1 formed with holes 11 through which ink (for example, paste-like solder) passes is rich in elasticity (for example, Nylon mesh) is held on the frame 3 through the heel 2. More specifically, the flange 2 is disposed between the stencil 1 and a second frame member 32 described later, and is bonded to the stencil 1 and the second frame member 32 by adhesion.

  Then, the ink 4 is supplied to the upper surface of the stencil 1 (hereinafter referred to as the stencil upper surface), and the ink 4 is moved on the stencil upper surface by reciprocating the squeegee 5 in the squeegee movement direction X on the stencil upper surface. At that time, the ink 4 passes through the holes 11 and predetermined printing is performed on a printing object (for example, a circuit board, not shown).

  The frame 3 includes two rectangular tube-shaped first frame members 31 and a rectangular plate-shaped second frame member 32. The first frame members 31 are arranged on both sides in the direction perpendicular to the squeegee movement direction X on the upper surface of the stencil, and extend along the squeegee movement direction X. The two first frame members 31 are connected by a second frame member 32 disposed on a lower surface of the stencil 1 (hereinafter referred to as a stencil lower surface).

  Thus, since the 1st frame member 31 is arrange | positioned in the orthogonal | vertical direction both sides with respect to the squeegee movement direction X in the stencil upper surface, and the 2nd frame member 32 is arrange | positioned in the stencil lower surface, the squeegee movement direction among stencil upper surfaces. There is no frame 3 on either side of X. In other words, the frame 3 is not provided in the squeegee movement direction X on the upper surface of the stencil.

  A rectangular opening 21 is formed in the flange 2. The second frame member 32 is formed with a rectangular opening 321. The opening 21 of the heel 2 and the opening 321 of the second frame member 32 are congruent and are arranged so as to overlap when viewed along the top-to-bottom direction.

  The hole 11 of the stencil 1 is located in the opening 21 of the heel 2 and the opening 321 of the second frame member 32 when viewed along the top-to-bottom direction.

  The length of the squeegee movement direction X of the stencil 1 is equal to the length of the frame 3 in the squeegee movement direction X. The position of the end of the stencil 1 in the squeegee movement direction X and the position of the end of the frame 3 in the squeegee movement direction X also coincide.

  The second stencil frame B has the same configuration as the first stencil frame A. However, the first stencil frame A and the second stencil frame B are different in the shape, size, arrangement, number, and the like of the holes 11.

  Next, based on FIG. 1, FIG. 3, the exchange operation | work of a stencil frame is demonstrated.

  FIG. 1A shows a process of setting a first stencil frame A on a screen printing apparatus and printing on a print object using the first stencil frame A. FIG.

  Thereafter, when the first stencil frame A is replaced with the second stencil frame B, first, the second stencil frame B is moved to the screen printing apparatus as shown in FIG.

  Subsequently, as shown in FIGS. 1C and 3, one end of the squeegee movement direction X in the first stencil frame A and one end of the squeegee movement direction X in the second stencil frame B And the ink 4 remaining on the upper surface of the stencil of the first stencil frame A is moved to the upper surface of the stencil frame B by the squeegee 5.

  At this time, there is no ink between one end side end in the squeegee movement direction X on the stencil upper surface of the first stencil frame A and one end side end in the squeegee movement direction X on the stencil upper surface of the second stencil frame B. There is no frame 3 that becomes an obstacle to movement. Therefore, the ink 4 remaining on the stencil upper surface of the first stencil frame A can be moved to the upper surface of the stencil frame B by the squeegee 5.

  Also, the ink movement from the first stencil frame A to the second stencil frame B eliminates the need for residual ink processing of the stencil frame before replacement, and eliminates the need to supply new ink to the stencil frame after replacement. Become.

  Subsequently, as shown in FIG. 1D, the first stencil frame A is discharged from the screen printing apparatus, whereby the stencil frame replacement operation is completed. Hereinafter, printing on the printing object is performed using the second stencil frame B.

  According to the present embodiment, using the portion of the stencil upper surface where the frame 3 is not provided, the ink 4 remaining on the stencil of the stencil frame before replacement is transferred to the squeegee 5 on the stencil of the stencil frame after replacement. The ink can be moved easily. Therefore, it is possible to shorten the work time when replacing the stencil frame. Further, the ink movement can be automated.

  Ink movement from the stencil frame body before replacement to the stencil frame body after replacement eliminates the need for residual ink processing of the stencil frame body before replacement and supply of new ink to the stencil frame body after replacement.

(Other embodiments)
In the above embodiment, the frame 3 is not provided on either side of the squeegee movement direction X on the stencil upper surface, but the frame 3 is not provided only on one side of the squeegee movement direction X on the stencil upper surface. Also good.

  In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably.

  Further, in the above-described embodiment, it is needless to say that elements constituting the embodiment are not necessarily indispensable except for the case where it is clearly indicated that the element is essential and the case where the element is clearly considered to be essential in principle. .

  Further, in the above embodiment, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is particularly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to a specific number except for cases.

  In the above embodiment, when referring to the shape, positional relationship, etc. of components, the shape, position, etc., unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to relationships.

1 Stencil 3 Frame 4 Ink 5 Squeegee 11 Hole

Claims (2)

The stencil (1) in which the hole (11) through which the ink (4) passes is held by the frame (3), and the ink supplied on one surface of the stencil is transferred to one surface of the stencil. In the screen printing device moved by the squeegee (5) above,
The screen printing apparatus according to claim 1, wherein the frame is not provided on at least one side of the squeegee movement direction (X) among the one surface of the stencil.   The frame is disposed on one side of the stencil on both sides perpendicular to the moving direction of the squeegee and extends along the moving direction of the squeegee, and the stencil. 2. The screen printing apparatus according to claim 1, further comprising a plate-like second frame member (32) disposed on the other surface side of the first plate member and connecting the two first frame members.

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