JP2001031194A - Apparatus and method for filling liquid resin into syringe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for filling a liquid resin into a syringe wherein filling operation can be automated to reduce work by human hands and also improve productivity, and accuracy in an amount to be filled can be improved. SOLUTION: The apparatus for filling a liquid resin into a syringe includes a stock tank 5 where the liquid resin is stocked, an injection nozzle 7 connected with the stock tank 5 via a transfer hose 6 for injecting the liquid resin from an opening 1 at an upper end to fill into a syringe 3 having the opening 1 at the upper end and an injection port 2 at a lower end, and a tube pump 4 for compressing a flexible tube 8 which forms a part of the transfer hose 6 and also moves a roller from the stock tank 5 toward the injection nozzle 7 thereby feeding the liquid resin toward the injection nozzle 7. The liquid resin fed by the tube pump 4 is injected from the injection nozzle 7 into the syringe 3 for filling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for filling a syringe with a liquid resin such as a liquid sealing resin used for sealing a semiconductor package. The present invention relates to an apparatus and a method for filling a liquid resin into a syringe suitable for application to a low-viscosity liquid resin.

[0002]

2. Description of the Related Art In sealing a semiconductor package using a liquid sealing resin, a liquid sealing resin is filled in a syringe 3 and the liquid sealing resin is poured from a spout 2 at a lower end of the syringe 3. This is done by dropping out. The syringe 3 has an opening 1 at the upper end as shown in FIG.
And a liquid resin such as a liquid sealing resin is injected into the syringe 3 through the opening 1 and filled therein. ing.

Here, since the liquid resin 14 is a viscous material, it is difficult to automate the work of injecting and filling the syringe 3 with the liquid resin 14 by mechanization. Therefore, conventionally, for example, as shown in FIG.
4 is filled. That is, the liquid resin 14 is dispensed from the resin container into the small container 20 and the spatula 21 is inserted into the liquid resin 14 in the small container 20 as shown in FIG. Then, as shown in FIG. 5B, the syringe 3 is filled with the liquid resin 14 by pouring the liquid resin 14 from the opening 1 at the upper end of the syringe 3 with a spatula 21.

[0004]

However, when the liquid resin 14 is manually filled into the syringe 3 as described above, there is a problem that the workability of the filling is poor and the productivity is reduced. There is also a problem that the accuracy of the filling amount of the liquid resin 14 into the resin is low.

The present invention has been made in view of the above points, and it is possible to reduce the manual work by automating the filling operation, improve the productivity, and improve the accuracy of the filling amount. An object of the present invention is to provide an apparatus and a method for filling a liquid resin into a syringe that can be used.

[0006]

According to a first aspect of the present invention, there is provided an apparatus for filling a liquid resin into a syringe according to the first aspect of the present invention, wherein a stock tank 5 storing the liquid resin is connected by a stock tank 5 and a transfer hose 6, and An injection nozzle 7 for injecting and filling a liquid resin from an upper end opening 1 into a syringe 3 formed by providing an opening 1 at a lower end and a spout 2 at a lower end, and a flexible part forming a part of a transfer hose 6. A tube pump 4 for compressing the flexible tube 8 with a roller 9 and moving the roller 9 from the stock tank 5 side to the injection nozzle 7 to feed the liquid resin to the injection nozzle 7 side. Things.

Further, according to the invention of claim 2, a syringe stand 10 for holding a plurality of syringes 3 arranged vertically and horizontally on a plane, and moving the syringe stand 10 in a vertical direction or a horizontal direction to directly under the injection nozzle 7 A stand moving device 11 for moving the syringe 3 at a position is provided.

[0008] The invention according to claim 3 provides a stock tank 5
The temperature control device 12 for controlling the temperature of the liquid resin in the inside is provided so as to be attached to the stock tank 5.

According to a fourth aspect of the present invention, there is provided a method for filling a liquid resin into a syringe, comprising: a stock tank for storing the liquid resin; an injection nozzle connected to the stock tank by a transfer hose; The tube pump 4 which feeds the liquid resin to the injection nozzle 7 side by pressing the roller 9 against the flexible tube 8 forming a part of the tube 6 and moving the roller 9 from the stock tank 5 side to the injection nozzle 7 side. The liquid resin is supplied from the stock tank 5 to the injection nozzle 7 through the transfer hose 6 by the tube pump 4 by the tube pump 4, and the injection nozzle 7 is inserted into the syringe 3 formed by providing the opening 1 at the upper end and the spout 2 at the lower end.
It is characterized in that more liquid resin is injected and filled through the opening 1 at the upper end.

[0010]

Embodiments of the present invention will be described below.

FIG. 1 shows an embodiment of the present invention. A liquid resin such as a low-viscosity liquid sealing resin is stocked in a stock tank 5. Stock tank 5
Has a tapered lower part and a supply port 3 at the lower end.
9 to supply liquid resin by air pressure
9 can be sent out.

A temperature control device 12 is provided on the outer periphery of the stock tank 5. The temperature adjusting device 12 is formed by providing heaters 32 and 33 on the outer surface of a heat retaining container 31 as shown in FIG.
As shown in (b), a heat-generating resistance wire is built in a base material 34 such as a band-shaped silicon rubber, and is attached so as to be wound around the outer periphery of the heat insulating container 31. As shown in FIG. 2C, the heater 33 is formed by incorporating a heating resistance wire in a base material 35 such as a disc-shaped silicon rubber, and has a cutout 36 and a hole 37 provided therein. It is attached to the lower surface of the heat-insulating container 31 through the cylindrical portion 38 at the lower end of the container 31. The supply port 39 at the lower end of the stock tank 5 is passed through the cylindrical portion 38, and the lower portion is fitted into the heat retaining container 31, so that the temperature adjusting device 12 is attached to the outer periphery of the lower portion of the stock tank 5. The temperature control device 12 generates heat at a temperature of about 35 ° C. or less, and has a control mechanism so that the temperature of the liquid resin in the stock tank 5 can be adjusted to a constant temperature in a range of 25 ± 2 ° C. It is.

One end of a transfer hose 6 is connected to a supply port 39 at the lower end of the stock tank 5, and an injection nozzle 7 is connected to the other end of the transfer hose 6. The injection nozzle 7 is arranged so as to be movable up and down by a lifting device 40, and the injection nozzle 7 is formed so as to discharge the liquid resin supplied from the stock tank 5 via the transfer hose 6.
The liquid resin discharged from the injection nozzle 7 is sequentially injected into the plurality of syringes 3 as described later. When the injection of the liquid resin into each cylinder 3 is completed, the discharge of the liquid resin from the injection nozzle 7 is performed once. If the liquid resin drips from the injection nozzle 7 when the discharge of the liquid resin is stopped, the opening 1 of the syringe 3 may be contaminated with the liquid resin. For this purpose, it is preferable to use a liquid-out nozzle (for example, a special nozzle manufactured by Naomi Corporation) having a dripping prevention mechanism as the injection nozzle 7.

In the middle of the transfer hose 6 between the stock tank 5 and the injection nozzle 7, a tube pump 4 is provided.
Is provided. In the middle of the transfer hose 6, a flexible tube 8 having elasticity is connected as a part of the transfer hose 6, and the liquid resin supplied from the stock tank 5 and flowing through the transfer hose 6 is: It flows through the flexible tube 8 to the injection nozzle 7. The tube pump 4 is provided at the place of the flexible tube 8. FIG. 3 shows an example of the tube pump 4. The pump body 41 is provided with a pump chamber 43 in a substantially U-shaped space in which an opening 42 is narrowed.
A flexible tube 8 bent in a letter shape is inserted. In the pump chamber 43, a rotor 44 is disposed inside the flexible tube 8 so as to be rotatably driven by a rotary drive shaft 45, and the roller 9 is rotatably mounted on the rotor 44. The rollers 9 are attached to a plurality of locations on the outer edge of the rotor 44, and at three locations in the illustrated embodiment. Each of the rollers 9a, 9b, and 9c is attached to each top of an equilateral triangle centered on the rotary drive shaft 45. They are arranged. The rotation of the rotor 44 causes each roller 9 to rotate.
The rollers 9a, 9b, 9c are adapted to roll on the surface of the flexible tube 8 along its longitudinal direction.
b and 9c, when located at a position facing the inner wall of the pump chamber 43, compress the flexible tube 8 by pressing the flexible tube 8 against the inner wall surface with the flexible tube 8 interposed between the inner wall surface and the pump chamber 43.
When the flexible tube 8 is at a position facing the opening 42 of the third tube 3, the flexible tube 8 is not compressed.

The tube pump 4 formed as described above
When the rollers 9a, 9b, 9c are at the position shown in FIG.
When the roller 9c faces the opening 42 while facing the inner wall of the flexible tube 8, the flexible tube 8 is compressed and crushed by the rollers 9a and 9b, and is crushed by the rollers 9a and 9b. The liquid resin is confined in the flexible tube 8 in the middle. Next, when the rotor 44 is rotated in the direction of the arrow as shown in FIG. 3B, the rollers 9a and 9b move along the flexible tube 8 toward the injection nozzle 7 and move between the rollers 9a and 9b. Flexible tube 8
The liquid resin confined inside moves inside the flexible tube 8 to the injection nozzle 7 side. At this time, the roller 9c
Is opposed to the inner wall of the pump chamber 43, and the rollers 9
c, the flexible tube 8 is compressed and crushed, and the liquid resin is confined in the flexible tube 8 while being crushed by the rollers 9b and 9c. Next, when the rotor 44 is further rotated in the direction of the arrow as shown in FIG. 3C, the roller 9a moves across the opening 42 and the roller 9b moves the flexible tube 8 to the injection nozzle 7 side. And the liquid resin trapped in the flexible tube 8 between the rollers 9a and 9b is sent out to the injection nozzle 7 side. At this time, the liquid resin confined in the flexible tube 8 between the rollers 9b, 9c
Move inside the flexible tube 8 to the side.

As described above, by rotating the rotor 44 to move the rollers 9a, 9b, 9c along the flexible tube 8 toward the injection nozzle 7, the liquid resin in the flexible tube 8 is squeezed out. Thus, the liquid resin can be fed to the injection nozzle 7 side, and the liquid resin can be supplied to the injection nozzle 7 by the tube pump 4. Then, by adjusting the rotation speed of the rotor 4, the rollers 9a,
By adjusting the moving speed of 9b and 9c, it is possible to adjust the feeding amount of the liquid resin.
Note that the flexible tube 8 may be formed only at the tube pump 4 of the transfer hose 6,
Further, the entire length of the transfer hose 6 may be formed by a flexible tube.

A syringe stand 10 is arranged below the injection nozzle 7. The syringe stand 10 holds a plurality of syringes 3 arranged in a vertical direction and a horizontal direction on an upper surface thereof. Each syringe 3 is held in an upright posture with the opening 1 facing upward. In the horizontal direction, they are arranged in a grid pattern at the same interval. The syringe stand 10 is arranged below the injection nozzle 7 and is horizontally moved by a stand moving device 11. The stand moving device 11 is a vertical table 6 that slides the syringe stand 10 in a direction parallel to the vertical direction in which the syringes 3 are arranged.
5 and a horizontal table 66 that slides the vertical table 65 in a direction parallel to the horizontal direction in which the syringes 3 are arranged. As the stand moving device 11, besides the XY table type, a device formed by an articulated robot can be used.

In the liquid resin filling apparatus of the present invention formed as described above, first, a syringe stand 10 in which a plurality of syringes 3 are arranged vertically and horizontally is set on a vertical table 65 of a stand moving device 11. Then, the liquid resin is sent out from the stock tank 5 to the transfer hose 6 by air pressurization, and the tube pump 4 is operated. The liquid resin sent out to the transfer hose 6 is supplied to the injection nozzle 7 by the tube pump 4,
The liquid resin is discharged from the lower end of the injection nozzle 7 while the injection nozzle 7 is lowered, and the liquid resin is injected and filled into the syringe 3 located immediately below the injection nozzle 7 from the opening 1 at the upper end thereof. It has become.

After filling the syringe 3 with the liquid resin in this manner, the discharge of the liquid resin from the injection nozzle 7 is stopped, the injection nozzle 7 is raised by the elevating device 40, and the stand moving device 11 is operated. Then, the syringe 3 located immediately below the injection nozzle 7 is moved to the next one by sliding the syringe stand 10 in the vertical direction or the horizontal direction. Then, the syringe 3 moved to a position immediately below the injection nozzle 7 is filled with the injection nozzle 7 in the same manner as described above.
And filling liquid resin. Hereinafter, similarly, the liquid resin is injected and filled from the injection nozzle 7 into each of the syringes 3 arranged vertically and horizontally on the syringe stand 10. Here, the filling amount of the liquid resin into the syringe 3 can be adjusted by the amount of the liquid resin sent out from the tube pump 4, and the filling amount of the liquid resin into each syringe 3 can be made constant. Things. Moreover, the liquid resin supplied from the stock tank 5 is adjusted to a predetermined constant temperature by the temperature adjusting device 12,
Since the viscosity of the liquid resin is kept constant, it is easy to make the amount of the liquid resin discharged from the tube pump 4 and discharged from the injection nozzle 7 constant, and the liquid resin is filled into each syringe 3. High precision of the quantity can be obtained.

The operation of injecting and filling the liquid resin into each syringe 3 is performed by moving the syringe stand 10 in the vertical direction or the horizontal direction by the stand moving device 11 to move the syringe 3 located immediately below the injection nozzle 7. The operation can be performed by discharging the liquid resin from the injection nozzle 7 in synchronization with the movement of the syringe 3, and the operation of injecting and filling the liquid resin into each syringe 3 can be automated. Thus, the productivity of filling the liquid resin into the resin can be improved. By the way,
When filling a syringe 3 having a capacity of 50 cc with a liquid resin having a viscosity of 12 ± 2 Pa · S adjusted to a temperature of 25 ° C.,
When filling the syringe 3 with the liquid resin by the conventional method of FIG. 5, it took 2 hours and 56 minutes per 100 syringes. However, the syringe 3 was filled with the liquid resin by the method of the present invention of FIG. In this case, it takes 2 hours and 43 minutes per 100 syringes.
One minute and 16 minutes of manual work was
In the method of the present invention shown in FIG. 1, the manual operation was drastically reduced to 41 minutes in 2 hours and 43 minutes.

[0021]

As described above, the apparatus for filling a liquid resin into a syringe according to the first aspect of the present invention is connected to a stock tank in which the liquid resin is stocked by a stock tank and a transfer hose. An injection nozzle for injecting and filling a liquid resin from an opening at an upper end into a syringe formed with a spout at a lower end, and a flexible tube forming a part of a transfer hose compressed by a roller. Since a tube pump that feeds the liquid resin to the injection nozzle side by moving the roller from the stock tank side to the injection nozzle side is provided, the liquid resin sent out by the tube pump can be injected into the syringe from the injection nozzle and filled. It is possible to fill the syringe with liquid resin with high productivity by reducing manual work and high precision of filling amount. That.

According to a second aspect of the present invention, there is provided a syringe stand for holding a plurality of syringes arranged vertically and horizontally on a plane, and moving the syringe stand in a vertical direction or a horizontal direction so that the syringe immediately below the injection nozzle can be moved. Since a stand moving device for moving is provided, the operation of injecting and filling the liquid resin into each syringe is performed by moving the syringe stand in the vertical direction or the horizontal direction with the stand moving device to move the syringe immediately below the injection nozzle. In addition, the injection of the liquid resin from the injection nozzle can be performed in synchronization with the movement of the syringe, and the operation of injecting and filling the liquid resin into a plurality of syringes can be automated.

According to a third aspect of the present invention, the temperature control device for adjusting the temperature of the liquid resin in the stock tank is attached to the stock tank. Can be maintained at a constant viscosity, it is easy to make the discharge amount of the liquid resin from the injection nozzle constant, and it is possible to obtain a high precision of the filling amount of the liquid resin into each syringe. is there.

According to a fourth aspect of the present invention, there is provided a method for filling a liquid resin into a syringe, comprising: a stock tank in which the liquid resin is stocked; an injection nozzle connected to the stock tank by a transfer hose; It has a tube pump that presses the roller against the flexible tube to be formed and moves the roller from the stock tank side to the injection nozzle side to send out the liquid resin to the injection nozzle side. The liquid resin is supplied to the injection nozzle, and an opening is provided at the upper end and a spout is provided at the lower end. The liquid resin is injected from the opening at the upper end into the syringe formed by the injection nozzle and filled. The liquid resin sent out by the injection nozzle can be injected into the syringe and filled Productivity by reducing the manual high and loading of high accuracy, is capable of filling a liquid resin in a syringe.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of the present invention.

FIG. 2 is a view showing a temperature adjusting device according to the first embodiment;
2 is a sectional view, (b) is a perspective view of a heater, and (c) is a plan view of the heater.

FIG. 3 shows the tube pump according to the first embodiment;
(A), (b), (c) are sectional views, respectively.

FIG. 4 is a front view of the syringe.

FIG. 5 shows a conventional example, and (a) and (b) are cross-sectional views.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Opening 2 Spout 3 Syringe 4 Tube pump 5 Stock tank 6 Transfer hose 7 Injection nozzle 8 Tube 9 Roller 10 Syringe stand 11 Stand moving device 12 Temperature control device

Claims (4)

[Claims] 1. A stock tank in which a liquid resin is stocked, connected to the stock tank by a transfer hose,
An injection nozzle for injecting and filling the liquid resin from the upper end opening into a syringe formed with an opening at the upper end and a spout at the lower end, and a flexible tube forming a part of the transfer hose with a roller And a tube pump for feeding the liquid resin to the injection nozzle by moving the roller from the stock tank side to the injection nozzle side. 2. A syringe stand for holding a plurality of syringes arranged vertically and horizontally on a plane, and a stand moving device for moving the syringe stand vertically and horizontally to move a syringe immediately below an injection nozzle. The apparatus for filling a liquid resin into a syringe according to claim 1, wherein the apparatus is provided with the liquid resin. 3. The filling of a liquid resin into a syringe according to claim 1, wherein a temperature control device for controlling the temperature of the liquid resin in the stock tank is provided in addition to the stock tank. apparatus. 4. A roller is pressed against a stock tank in which a liquid resin is stocked, an injection nozzle connected to the stock tank by a transfer hose, and a flexible tube forming a part of the transfer hose, and the roller is stocked. Equipped with a tube pump that sends the liquid resin to the injection nozzle side by moving it from the tank side to the injection nozzle side, the liquid resin is supplied from the stock tank to the injection nozzle through the transfer hose by the tube pump, and the opening at the upper end is at the lower end A method for filling a liquid resin into a syringe, wherein the liquid resin is injected from an injection nozzle into an syringe formed with a spout and filled from an opening at an upper end.