JP2016010860A - Screen printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress deflection of a part, which protrudes from a side surface of a base plate support block, of a base plate during sliding of a squeegee.SOLUTION: A pair of carrier rolls 4 and 4 is used as conveyance means for conveying a base plate W to a position right under a mask 3 is used. A side surface of a base plate supporting block 6 ascending/descending in predetermined timing between the pair of carrier rolls 4 and 4 is provided with a support piece part 8 in which a protrusion 8a getting into a section between respective rolls 4a of the pair of carrier rolls 4 and 4 is formed on the outside in such a manner as to make a top surface correspond to a top surface of the base plate supporting block 6.

Description

  The present invention relates to a screen printing machine that prints (applies) a paste-like printing material such as cream solder supplied on a mask from a pattern hole of the mask to a predetermined position with a squeegee that slides on the mask.

  Screen printing in which a paste-like printing material such as cream solder supplied on the mask is printed (applied) from the pattern hole of the mask to a predetermined position of the substrate with the squeegee sliding on the mask in a state where the mask is superimposed on the substrate. The machine is well known, and FIGS. 8 to 11 show a conventional general screen printing machine.

  Reference numeral 100 denotes a screen printing machine, which is arranged in parallel with a mask 101 held by a mask holding frame (not shown) at an interval corresponding to the width of the substrate W, and serves as a transport unit that transports the substrate W directly below the mask 101. The pair of transport belts 102, 102 and the pair of transport belts 102, 102 extend along the transport direction (X-axis direction) of the pair of transport belts 102, 102 at the upper outer side of each of the pair of transport belts 102, 102. A mask support plate 103, 103 having a length corresponding to the length of the plate and the pair of transport belts 102, 102 are disposed between the pair of transport belts 102, 102, and are elevated (Z-axis direction) at an appropriate timing to mount and receive the substrate W on the upper surface. Further, the upper surface of the substrate W and the upper surfaces of the mask support plates 103 and 103 are flush with each other. A substrate support block 104 that is lowered to the initial position, and a squeegee 105 that slides on the mask 101 in a direction (Y-axis direction) orthogonal to the transport direction (X-axis direction) of the substrate W at an appropriate timing. It consists of

  The conventional screen printer 100 has the above-described configuration, but it has the following problems. That is, the substrate support block 104 pushes up the substrate W, and the squeegee 105 is slid in a state where the upper surface of the substrate W and the upper surfaces of the mask support plates 103 and 103 are on the same horizontal plane. As shown in FIG. 5, both end portions in the width direction of the substrate W protrude from the side surface of the substrate support block 104 in the portion L, and the lower surface side S of the portion is in an unsupported state.

  That is, when a sliding operation with the squeegee 105 is performed in such a state, the portion protruding from the substrate support block 104 of the substrate W through the mask 101 is deflected by the pressure of the squeegee 105, and the positional deviation from a predetermined pattern after printing is performed. This causes problems such as variations in the coating amount of printing materials such as solder paste. Recently, since the mask 101 is also thinned to about 100 μm and the substrate W is also thinned to about 0.6 mm, the substrate W is more easily bent, and this problem is improved. Is urgently requested. In addition, the size (surface area) of the substrate W has become extremely small, and therefore, it is desired that the entire surface including the end portion of the substrate W can be used as a printing surface.

  The present invention has been made in view of the above points, and in the state where the substrate is pushed up by the substrate support block and the upper surface of the substrate and the upper surface of the mask support plate are in the same horizontal plane, The lower surface side of the portion protruding from the side surface of the substrate support block is supported by the support piece provided on the side surface of the substrate support block, which eliminates the problems of the conventional screen printer and is desired. Therefore, the present invention intends to provide a screen printer capable of reliably realizing this.

Thus, the gist of the present invention is that a pair of transport means are disposed in parallel at a distance corresponding to the width of the substrate and the mask held by the mask holding frame, and transport the substrate directly below the mask. And a mask support plate that extends along the transport direction of the pair of transport means on the upper outer side of each of the pair of transport means, and has a length corresponding to the length of the substrate, and between the pair of transport means The upper surface of the substrate and the upper surface of the mask support plate are flush with each other and are raised at an appropriate timing to be mounted on the upper surface, and after the completion of printing by the squeegee. Is a screen printing machine comprising a substrate support block that is lowered to an initial position and a squeegee that slides on the mask in a direction perpendicular to the substrate transport direction at an appropriate timing.
The pair of conveying means is a pair of conveying rolls, and the side surface of the substrate support block is aligned with the upper surface of the substrate supporting block, and the outside of each of the pair of conveying rolls is between each roll. The present invention provides a screen printing machine comprising a support piece portion on which a projection to enter is formed.

  Further, in the above configuration, the support piece portion may be a support piece portion formed integrally with the substrate support block, and the support piece portion is formed separately from the substrate support block, screwed, and bonded. It is good also as a support piece part with which the board | substrate support block was equipped by connecting with appropriate means, such as.

  The present invention is configured as described above, and a pair of transport means for transporting a substrate is changed from a conventional transport belt to a transport roll to create a space in which an object can move in the vertical direction between the rolls. By providing a support piece portion formed between the rolls of each of the pair of transport rolls on the side surface of the substrate support block that is disposed between the transport rolls and goes up and down between them, the substrate support block When the squeegee slide operation is performed in a state where the substrate is pushed up and the upper surface of the substrate and the upper surface of the mask support plate are in the same horizontal plane, the lower surface side of the portion protruding from the side surface of the substrate support block at both ends of the substrate is The support piece is to be supported. As a result, the bending of the substrate end due to the pressure of the squeegee during the sliding operation of the squeegee is suppressed, so that the problems of the conventional screen printing machine can be solved and the substrate which has become extremely small recently. The entire surface including the end portion can be used as the printing surface. Further, since the substrate transport means is a transport roll, there is no sliding portion in the case of the transport belt, there is no generation of fine dust caused by rubbing, and there is little generation of static electricity. Further, the contact portion of each roll with the substrate can be changed to a material suitable for each substrate, and the transport reliability can be improved.

It is the principal part top view which abbreviate | omitted and showed the mask of the screen printing machine which concerns on embodiment of this invention. It is the same side view. It is an expanded sectional view of the part of the roll and a support piece part. It is an expansion perspective view of the support piece part. It is a side view of the state where the substrate support block was raised. It is an expanded sectional view of the edge part of the board | substrate in the state which the board | substrate support block raised. It is a perspective view of the other example of the support piece part. It is the principal part top view which abbreviate | omitted and showed the mask of the conventional screen printer. It is the same side view. It is a side view of the state where the substrate support block was raised. It is an expanded sectional view of the edge part of the board | substrate in the state which the board | substrate support block raised.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  In the figure, reference numeral 1 denotes a screen printer. The screen printer 1 is arranged in parallel with the mask 3 held by the mask holding frame 2 at an interval corresponding to the width of the substrate W, and transports the substrate W directly below the mask 3. The rolls 4, 4 and the pair of transport rolls 4, 4 extend along the transport direction (X-axis direction) of the pair of transport rolls 4, 4 and correspond to the length of the substrate W. It is disposed between the mask support plates 5 and 5 having a length and the pair of transport rolls 4 and 4, and rises at an appropriate timing (in the Z-axis direction) to place the substrate W on the upper surface and further rise. The substrate support block 6 is configured such that the upper surface of the substrate W and the upper surfaces of the mask support plates 5 and 5 are on the same horizontal plane, and the substrate support block 6 is lowered to the initial position after printing by the squeegee described later, and At the timing of the mask The squeegee 7 slides in the direction (Y-axis direction) orthogonal to the transport direction (X-axis direction) of the substrate W, and the upper surface is the upper surface of the substrate support block 6 on the side surface of the substrate support block 6. And a support piece portion 8 formed with protrusions 8a that enter between the rolls 4a of each of the pair of transport rolls 4 and 4 on the outside. In the figure, 9 is a rotating shaft of each of the rolls 4a of the pair of conveying rolls 4, 4, 10 is a bearing of the rotating shaft 9, 11 is a pulley fixed to the end of the rotating shaft 8, and 12 is the above-mentioned It is a belt hung between pulleys 11.

  Further, in the present embodiment, the support piece 8 is formed separately from the substrate support block 6 and is connected to the substrate support block 6 by an appropriate means such as screwing or bonding. However, the support piece 8 may be integrally formed without being separated from the substrate support block 6.

  In addition, the support piece 8 uses a rectangular plate having a predetermined thickness in the present embodiment, and has a predetermined depth according to the interval between the rolls 4a in each of the pair of transport rolls 4 and 4 on one surface. In addition to this, a projection 8a is formed by making a vertical groove 8 '. In addition to this, for example, as shown in FIG. 7, a thin plate having an appropriate hardness is formed in a comb-teeth shape. It may be.

Next, the operation of the above embodiment will be described.
First, the unprinted substrate W is transported in the X-axis direction by the pair of transport rolls 4, 4, and stops when it is positioned directly below the mask 3. Next, the substrate support block 6 rises in the Z-axis direction so that the substrate W is placed on the upper surface thereof, and further rises so that the upper surface of the substrate W and the upper surfaces of the mask support plates 5 and 5 are on the same horizontal plane. To do. Next, the squeegee 7 slides on the mask 3 in the Y-axis direction, and printing is performed with a paste-like printing material such as cream solder (not shown). Next, the substrate support block 6 is lowered, and the substrate W is transferred to the pair of transport rolls 4 and 4 in the middle thereof. The delivered substrate W is transported to the next process by the pair of transport rolls 4 and 4 that have been restarted. On the other hand, the substrate support block 6 that has delivered the substrate W further descends and returns to the initial position. This completes one set of work.

  Thus, in this embodiment, the substrate W is pushed up by the substrate support block 6 and the squeegee 7 is slid in a state where the upper surface of the substrate W and the upper surfaces of the mask support plates 5 and 5 are on the same horizontal plane. In this case, as shown in FIG. 6, the support piece 8 supports the lower surface side S of the portion (L portion) protruding from the side surface of the substrate support block 6 at both ends of the substrate W.

  As a result, the bending of the end portion (L portion) of the substrate W due to the pressure of the squeegee 7 during the sliding operation of the squeegee 7 is suppressed, so that the problems of the conventional screen printing machine can be solved. The entire surface including the edge of the substrate, which has become extremely small recently, can be used as the printing surface.

DESCRIPTION OF SYMBOLS 1 Screen printer 2 Mask holding frame 3 Mask 4, 4 A pair of conveyance roll 4a, 4a roll 5, 5 Mask support plate 6 Substrate support block 7 Squeegee 8 Support piece part 8a Protrusion

Claims (3)

A pair of conveying means arranged in parallel with the mask held by the mask holding frame at an interval corresponding to the width of the substrate, for conveying the substrate directly below the mask, and on the outer upper side of each of the pair of conveying means A mask support plate that extends along the transport direction of the pair of transport means and has a length corresponding to the length of the substrate, and is disposed between the pair of transport means and rises to an upper surface at an appropriate timing. The substrate support block that receives the substrate and further rises so that the upper surface of the substrate and the upper surface of the mask support plate are on the same horizontal plane, and descends to the initial position after printing by the squeegee. And a screen printing machine consisting of a squeegee that slides on the mask in a direction perpendicular to the substrate transport direction at an appropriate timing,
The pair of conveying means is a pair of conveying rolls, and the side surface of the substrate support block is aligned with the upper surface of the substrate supporting block, and the outside of each of the pair of conveying rolls is between each roll. A screen printing machine comprising a support piece portion on which protrusions are formed.   The screen printing machine according to claim 1, wherein the support piece is a support piece formed integrally with the substrate support block. 2. The screen printing machine according to claim 1, wherein the support piece portion is a support piece portion formed on the substrate support block by forming the support piece portion separately from the substrate support block and connecting them with appropriate means such as screwing and bonding. .

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