JP2510275Y2 - Paste coating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] A paste application syringe is made rotatable between a vertically downward position and a position inclined by a predetermined angle from the vertically downward position.

[Industrial applications]

 The present invention relates to a paste coating device.

[Conventional technology]

In the work of applying paste such as cream solder, adhesive, and sealing material to the substrate in order to fix the semiconductor chip etc. to the substrate, the application device conventionally used is a cylindrical syringe with the paste filled inside. And means for discharging the paste from the tip of the syringe. The syringe has a syringe-like structure, and the paste filled in the syringe is ejected from the tip by a constant amount by applying a constant pressure from the rear for a fixed time using air pressure or the like. The tip of the syringe always faces vertically downward, and the syringe itself moves in the vertical direction to apply the paste to the substrate placed at a predetermined position below the syringe. For example, when the coating operation is temporarily interrupted for replacement of the substrate or the like, the syringe is moved to and held at the upper position with its tip facing vertically downward.

[Problems to be solved by the device]

In the above prior art, during the interruption of the coating operation,
The paste in the syringe drops slightly due to gravity,
A small amount protrudes from the tip of the syringe. The protruding paste was held spherical by the surface tension, and the longer the work was suspended, the more the amount of paste held at the tip of the syringe increased. Therefore, when the work was restarted, the applied amount of paste at the first several points sometimes exceeded the specified amount.

An object of the present invention is to provide a paste application device that can always apply a prescribed amount of paste even when the work is restarted after the paste application work is interrupted.

[Means for solving the problem]

In order to achieve the above-mentioned object, the present invention provides a cylindrical syringe filled with paste inside, an extrusion means for discharging the paste from the tip of the syringe, and a syringe that supports and moves vertically. A syringe holder that can be installed and a syringe whose first end is vertically downward
In a paste applicator provided with a rotation drive means capable of rotating between a position and a second position inclined from the position by a predetermined angle, the pushing means operates when the syringe is in the first position. Is provided, and when the syringe is in the second position, the paste is paused to store the paste in the syringe.

[Action]

In the above configuration, the syringe can be rotated and placed horizontally or at a position close to it when the paste application work is interrupted, and the paste is prevented from accumulating excessively on the tip of the syringe.

〔Example〕

The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings.

FIG. 1 is a perspective view showing the configuration of a paste coating apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view of a rotary drive unit and a syringe holder which are components of the paste coating apparatus of FIG. 1, and FIG. 4 and FIG. 4 are sectional views of the syringe holder and the syringe, respectively.

Referring to FIG. 1, a paste applying apparatus 10 according to an embodiment of the present invention is installed in a column 12 installed vertically on a floor. The column 12 is provided with two support pieces 14 projecting in the horizontal direction and two pieces above and two pieces below, and two guide shafts 16 are formed in each of the support pieces 14 and extend in parallel with each other in the vertical direction at intervals. Are fixed at each end. Movable pedestal 18 on the guide shaft 16
, But here the guide shaft 16 penetrates vertically around the both ends of the movable pedestal 18.
The 18 is adapted to move vertically along the guide shaft 16. At this time, the movable pedestal 18 is installed so as not to contact the column 12. Column 12 also has an upper support piece.
A drive source 20 for moving the movable pedestal 18 in the vertical direction is fixedly installed between the two guide shafts 16 in the vicinity of 14. The drive source 20 has a pneumatic or electric structure, from which a drive shaft 22 extends downward and is connected to the movable pedestal 18. For example, when the drive source 20 is a pneumatic type, the drive shaft 22 moves in the vertical direction during operation, and the movable pedestal 18 moves in the same direction as the guide shaft 16 in the vertical direction.

A rotary drive device 24 is connected to the front surface 18a of the movable pedestal 18. The rotary drive device 24 rotatably supports a syringe holder 26 and a syringe 28 which will be described later, and its structure is composed of a rotary drive source 30 and a case 32 covering the outside thereof, as shown in FIG. . The case 32 is fixed to the movable pedestal 18, the rotary drive source 30 is composed of a pneumatic rotary actuator or an electric motor, and includes an operating shaft 34 protruding outside the case 32. The operating shaft 34 rotates as indicated by an arrow a. To do.

As shown in FIGS. 1 and 2, a syringe holder 26 is connected to the front portion of the rotary drive device 24. As shown in FIG. 3, the syringe holder 26 has a substantially cubic block shape, and has a cavity 36 that penetrates vertically and a rotary drive device 24.
And a recess 38 provided on the side. The syringe holder 26 is rotatable with respect to the case 32 of the rotary drive device 24, and the operating shaft 34 extending from the rotary drive device 24 is attached to the syringe holder 26.
It is fitted into a recess 38 provided in the above to connect both. The syringe 28 is fitted in a cavity 36 provided in the syringe holder 26 and is detachably held.

The syringe 28 has a syringe-like structure as shown in FIG. 4, and is composed of a tubular body 40 filled with paste and a nozzle 42 detachably attached to the tip of the tubular body. The nozzle 42 has a discharge port 44 depending on the required paste application amount.
It can be replaced with several types of nozzles with different diameters. A flange 46 is provided at the rear end of the tubular body 40 of the syringe 28.
And a lid 48 is attached to the flange 46. The lid 48 includes a hose 50, which is connected to the pneumatic supply means 52. The pneumatic supply means 52 is installed to apply a specific pressure in the syringe 28. The air pressure supply means 52 can be preset so that a specific pressure is applied to the syringe 28 for a specific time, and when the paste is applied, the inside of the syringe 28 is pressurized according to this setting, and a prescribed amount of paste is discharged from the syringe nozzle 42. To do. As shown in FIG. 1, a predetermined work table (not shown) is provided below the syringe 28.
The substrate 54 placed on top is placed, and the substrate 54 moves on the horizontal plane according to the operation of the work table and the syringe
The drive source 20 moves downward to apply the paste to a predetermined position on the substrate 54.

The paste applying apparatus 10 of the embodiment shown in FIG. 1 operates the rotary drive device 24 when the paste applying operation is interrupted due to a substrate exchange, an apparatus failure, a break, or the like. That is, the nozzle 42 can be rotated from the position facing vertically downward to a position inclined by a desired angle from the position and held at that position. By holding the syndge 28 in the desired inclined position in this manner until the paste application work is restarted, it is possible to prevent the paste from being excessively accumulated at the tip end portion of the nozzle 42 of the syringe 28, and the application work can be performed. Even after the restart, the predetermined amount of paste can be applied. Here, the above-mentioned tilt angle can be adjusted by the rotary drive device 24 so that an optimum tilt position can be obtained according to the amount of paste remaining in the syringe 28, the viscosity, and the like. Further, the operation of the rotary drive device 24 may be performed by arbitrarily operating a dedicated switch, but it is also possible to set the time in advance by a timer and perform the automatic operation.

FIG. 5 is a view of another embodiment of the present invention and illustrates a modification of the portion shown in FIG. In this embodiment, a syringe holder 56 having a different shape from the syringe holder 26 of the embodiment shown in FIG. 1 is used. The syringe holder 56 has a ring shape and is fixed to the tip of the rotation shaft 34 of the rotation drive device 24. The syringe 28 is inserted into a ring-shaped syringe holder 56 and held by tightening a screw 58. Also in this embodiment, the syringe 28 can be rotated and held at a desired inclined position when the paste application operation is interrupted.

[Advantages of the Invention] The paste applying device according to the present invention makes it possible to rotate the paste-filled syringe between a position in which the tip end faces vertically downward and a position inclined by a predetermined angle from that, and when the paste application work is interrupted. Since the syringe is moved to a predetermined inclined position so that the paste does not collect excessively on the tip of the syringe, even when the work is resumed after the paste application work is interrupted, the same predetermined amount of paste as when interrupted can be applied.

[Brief description of drawings]

FIG. 1 is a perspective view showing the structure of a paste applying apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view of a rotary driving device and a syringe holder in the paste applying apparatus of FIG.
FIG. 4 is a sectional view of the syringe holder in the paste coating apparatus of FIG. 1, FIG. 4 is a sectional view of the syringe of the present invention,
FIG. 5 is a perspective view showing another embodiment of the portion shown in FIG. 10 ... Paste application device, 12 ... Column, 16 ... Guide shaft, 18 ... Movable pedestal, 20 ... Drive source, 24 ... Rotation drive device, 26 ... Syringe holder, 28 ... Syringe, 30 ... … Drive source, 34 …… actuating shaft, 42 …… nozzle, 48 …… lid, 50…
… Hose, 52 …… Pneumatic supply device, 54 …… Substrate, 56 …… Syringe holder.

Claims (1)

(57) [Scope of utility model registration request] 1. A cylindrical syringe having a paste filled therein, an extrusion means for discharging the paste from the tip of the syringe, and a syringe that supports the syringe and is vertically movable. A paste applying apparatus comprising: a holder; and a rotation driving means capable of rotating the syringe between a first position in which a tip portion of the syringe is directed vertically downward and a second position in which the tip is inclined by a predetermined angle from the first position, The push-out means is activated when the syringe is in the first position to discharge the paste, and is paused when the syringe is in the second position to store the paste in the syringe. .