JPH04253618A - Vacuum filling machine for small vessel with liquid material - Google Patents

Abstract

PURPOSE:To increase filling speed of a liquid material and securely defoam and further, facilitate change-over operation of materials and cleaning work. CONSTITUTION:A liquid material 5 is extruded from a liquid material feeder to feed it to a filling nozzle 4. In a vacuum tank 1, a small vessel 2 is held and the liquid material 5 is forced to drop from the filling nozzle 4 to fill the small vessel 2 with the material.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for filling a small container such as a syringe with a high viscosity liquid material such as a high viscosity resin material in a fixed amount in a vacuum.

0002

[Prior Art] This type of high viscosity liquid material filling device is known from Japanese Patent Application No. 62-14844 filed earlier by the present applicant.
There is something disclosed in the issue. This is constructed as shown in Fig. 4, in which the tip opening b of the small diameter at the lower end of syringe a is connected to the filling port c, and the connector e of the vacuum suction means d is connected to the large diameter base at the upper end of syringe a. It is connected to the end opening f, and is filled with a high viscosity liquid material from the filling port c while vacuum suctioning the inside of the syringe a. Float the airtight plate h on the liquid surface of the material supply container g, and while pressurizing the airtight plate h with the pressurizing means i, drive the pressure pump j to force-feed the high viscosity liquid material to the filling port c. It looks like this.

0003

[Problems to be Solved by the Invention] However, in the case of such a conventional example, there is a problem that the filling speed is slow because the filling is performed through the small-diameter tip opening b of the syringe a, and the material is There is a problem that it takes time to change over and disassemble and clean, and there is also the problem that it is difficult to degas the inside because the structure is such that syringe A is filled from the bottom and vacuum suction is done from the top.
If the strength of the syringe a is weak because it creates a vacuum inside, there is a risk of damage, and there is a problem that high vacuum cannot be applied.
Furthermore, if the high viscosity liquid material contains an inorganic filler, there is a problem of severe wear.

The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to provide a liquid that has a high filling speed, can be defoamed reliably, and can be easily changed and cleaned. The present invention provides a vacuum filling device for filling small containers with materials.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the vacuum filling apparatus of the present invention for filling small containers with liquid material comprises a holding device in which a small container 2 is vertically held in a vacuum chamber 1 which is maintained in a vacuum state. A filling nozzle 4 for filling the liquid material 5 from above the vacuum chamber 1 is introduced into the vacuum chamber 1.
The filling nozzle 4 is connected to a liquid material supply device 6 which is arranged to face above the small container 2 held in the holding part 3 and which supplies the liquid material 5 by extruding it under pressure.

[0006]

[Operation] The liquid material 5 is supplied from the liquid material supply device 6 to the filling nozzle 4 by pressure extrusion. Then, the liquid material 5 is dropped from the filling nozzle 4 to fill the small container 2 in the vacuum chamber 1 with the liquid material 4. At this time, the inside of the vacuum chamber 1 is filled while being kept in a vacuum state, and air is degassed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A vacuum chamber 1 is composed of a container-shaped vacuum chamber main body 1a with an open bottom and a base 1b on the bottom. The vacuum chamber main body 1a can be moved up and down. Vacuum chamber body 1
A packing is attached to the entire circumference of the lower end of a, so that when the vacuum chamber main body 1a is lowered onto the base 1b, the packing can maintain airtightness. A suction line 8 is connected to the vacuum chamber main body 1a, and the interior can be kept in a vacuum by drawing suction through the suction line 8 with a vacuum pump.

A plurality of bases 1b are mounted on the base 9 of the device.
is placed thereon so that a plurality of bases 1b can be conveyed in an annular manner as shown by the arrows in FIG. base 1
A holding portion 3 for holding a small container 2 such as a syringe vertically is provided on top of b. This holding part 3 holds a plurality of small containers 2, and in the case of this embodiment, it holds five small containers 2. The small container 2 is formed into a cylindrical shape from a transparent or translucent material.

The position indicated by the symbol A in FIG. 2 is an empty container supply station, B is a rough filling station, and C is a final filling station. At the empty container supply station A, an empty small container 2 is set in the holding section 3, and at the rough filling station B, the liquid material 5 is filled into the small container 2 to about 2/3 of the fixed amount.
is now filled. At the final filling station C, the small container 2 is filled with the liquid material 5 to a fixed amount.

In the rough filling station B, as shown in FIG. 1, two vacuum chamber bodies 1a are arranged so as to be vertically movable by an elevating cylinder 10. A corresponding number of filling nozzles 4 are introduced, and each filling nozzle 4 corresponds to the opening at the upper end of each small container 2. In the final filling station C, one vacuum chamber main body 1a is arranged so as to be able to be raised and lowered vertically by an elevating cylinder 11, and a number of filling nozzles 4 corresponding to the number of small containers 2 are inserted from the upper surface of the vacuum chamber main body 1a. Each filling nozzle 4 corresponds to an opening at the upper end of each small container 2. Further, when a certain amount of liquid material 5 is filled into the small container 2, the liquid level is detected by a liquid level sensor 12 and the filling is stopped. A liquid material 5 is supplied from this filling nozzle 4 for filling, and the liquid material 5 is something like resin, such as an epoxy sealing material (containing filler).

[0011] Thus, at the empty container supply station A, the empty small container 2 is held in the holding portion 3 of the base 1b. Next, this base 1b is sent to the rough filling station B, where the vacuum chamber main body 1a is lowered onto the base 1b, the vacuum chamber 1 is made airtight, the inside of the vacuum chamber 1 is vacuumed, and the liquid material is discharged from the filling nozzle 4. 5 and liquid material 5 into small container 2.
Fill inside. At this time, the liquid material 5 is defoamed since it is filled in a vacuum state. At the rough filling station B, the small container 2 is filled to about 2/3 of the fixed amount. After completing the rough filling, air is introduced into the vacuum chamber body 1.
a is raised and the base 1b is placed at the final filling station C.
sent to. At the final filling station C, the vacuum chamber body 1a is similarly lowered to make the vacuum chamber 1 airtight, and the liquid material 5 is filled from the filling nozzle 4. When a certain amount of liquid material 5 is filled into the small container 2, it is detected by the liquid level sensor 12 and the liquid material 5 is filled to a fixed amount. After finishing the final filling,
Air is introduced, the vacuum chamber body 1a is raised, and the base 1
b is moved and the small container 2 filled with the liquid material 5 is taken out.

FIG. 3 is a diagram for explaining the structure of the liquid material supply device 6. As shown in FIG. A mixing tank 15 is loaded with a liquid material 5 that has been vacuum degassed in a separate process. The mixing tank 15 and the material distribution pipe 16 are communicated through a material supply pipe 17, and the material distribution pipe 16 is communicated with each filling nozzle 4 through a feed pipe 18, respectively. The material distribution pipe 16 is a double pipe and is configured to supply hot water from a hot water supply section 19 to the outer periphery to keep it warm. The mixing tank 15 is installed in the pressure extruder 20, and the extrusion head 21 of the pressure extruder 20 is placed inside the mixing tank 15, so that the extrusion head 21 can be driven up and down by the drive cylinder 22. ing. When the extrusion head 21 is driven to move downward, the liquid material 5 in the mixing tank 15 is pressurized and extruded, passing through the above-mentioned path to the filling nozzle 4.
is supplied to Compressed air is supplied to the compressed air supply pipe 23 from a compressed air supply section 24 , and the compressed air supply pipe 23 is connected to the communication pipe 26 via a three-way valve 25 .
The communication pipe 26 is connected to the inside of the mixing tank 15. The suction pipe 8 is designed to be vacuum-suctioned by a vacuum generator 29, and the three-way valve 25 and the suction pipe 8
are communicated. Thus, when the extrusion head 21 is lowered to extrude the liquid material 5, the inside of the mixing tank 15 is vacuum-suctioned, and when the extrusion head 21 is raised, compressed air is sent into the mixing tank 15. Furthermore, a three-way valve 27 is provided in the middle of the suction pipe 8, and this three-way valve 27 is provided with an atmosphere opening portion 28.

[0013]

Effects of the Invention As described above, the present invention provides a holding section for vertically holding a small container in a vacuum chamber that is maintained in a vacuum state, and a filling nozzle for filling a liquid material from above the vacuum chamber. The liquid material supply device is connected to the filling nozzle, and the filling nozzle is introduced into the container and faces above the small container held in the holding part, and the liquid material supply device supplies the liquid material by extruding it under pressure. The liquid material is supplied to the filling nozzle by pressurized extrusion, and the liquid material is dropped from the filling nozzle to fill a small container in a vacuum chamber. The filling speed is faster than that of conventional methods, and since it is filled in a vacuum chamber, air can be removed reliably.Furthermore, there is no pressure applied to small containers as in conventional methods, making it easier to store small containers. There is no risk of damage, and it can be filled under high vacuum.Furthermore, since the liquid material is supplied by pressurized extrusion, there is no need for a pump as with conventional methods, and material changes and disassembly and cleaning are possible. It's easy to do.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of an embodiment of the present invention.

FIG. 2 is a plan view of the same as above.

FIG. 3 is a side sectional view of the same as above.

FIG. 4 is a sectional view of a conventional example.

[Explanation of symbols]

1 Vacuum chamber 2 Small container 3 Holding part 4 Filling nozzle 5. Liquid material 6 Liquid material supply device

Claims (1)

[Claims] Claim 1: A holding part for vertically holding a small container is provided in a vacuum chamber that is maintained in a vacuum state, and a filling nozzle for filling a liquid material from above the vacuum chamber is introduced into the vacuum chamber. facing above the small container held in the holding part,
A vacuum filling device for filling a small container with a liquid material, characterized in that a liquid material supply device that supplies the liquid material by pressure extrusion is connected to a filling nozzle.