JP3234384B2 - Degassing and sealing of packaging bags - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention discharges air from a heat-sealable packaging bag containing fine particles of a drug or the like, and then heat-seals the opening of the packaging bag. The present invention relates to a method for degassing and sealing a packaging bag.

[0002]

2. Description of the Related Art Conventionally, the opening of a heat-sealable packaging bag containing powdery and granular materials is defined as a. ~ C. (See, for example, Japanese Utility Model Laid-Open No. 3-8105)
See) . a. At the opening of the packaging bag, insert the plastic bag that can be melted with the packaging bag.
Is formed in a tubular shape with a black film, and the
One mouth is provided with a filtration hole smaller than the particle diameter of the granular material
Remove the exhaust pipe to which the filter is attached
From the opening, and raise the opening edge of the
Close the opening by frequency bonding and insert the inserted discharge pipe
High-frequency connection between both outer surfaces of the
And attach the discharge tube to the packaging bag, and
Through the filter of the discharge pipe only. b. In this state, the drainage projecting from the opening of the packaging bag
Insert the deaeration nozzle of the vacuum pump into the other port of the outlet pipe
Air in the packaging bag and filter exhaust pipe
Discharge out of bag through chisel. c. After only unnecessary air is removed by suction,
Bend the protruding end and glue the other opening of the discharge pipe
Adhesively seal with tape.

[0003]

DISCLOSURE OF THE INVENTION Degassing of conventional packaging bags
In the sealing method, the air in the packaging bag is exhausted with a deaeration nozzle.
The powder stored in the packaging bag is discharged together with the air.
Is prevented by the filter of the discharge pipe
On the other hand, until the degassing and sealing of the packaging bag is completed
Of the opening edge of the packaging bag other than where the discharge pipe is inserted
A bonding process in which the opening edge is high-frequency bonded to close the opening,
Both outer sides of the inserted discharge pipe and both inner sides of the opening edge of the packaging bag
Attaching the discharge pipe to the packaging bag by high-frequency bonding with the surface,
After only the unnecessary air is removed by suction, the
At the same time, and attach the other end of the discharge pipe to the adhesive
It requires a process of bonding and sealing with a
Had led to a decline. Moreover, pull out the deaeration nozzle
Bend the projecting end of the discharge pipe from the
Until the package is sealed with adhesive tape, etc., the packaging bag is discharged.
It is necessary to keep holding down the pipe bonding point,
If it is perfect, it will cause poor degassing due to backflow of air
there is a possibility. Furthermore, even when making the discharge pipe,
A discharge pipe body formed of a plastic film in a cylindrical shape,
Filter with filtration holes smaller than the particle size of the powder
In Toga必 needed, and a filter at one end of the exhaust pipe main body
High cost of production of the exhaust pipe due to the need to adhere in advance
It is easy to cause soaring. In addition, before the degassing process,
This adhesive adheres to the opening edge of the packaging bag,
It is necessary to select a material that does not seal the outlet pipe itself.
There were restrictions on fee selection. An object of the present invention is in the packaging bag
Degassing while preventing the discharge of powder and granules stored in
While using the filter of
By rationally devising the heat fusion treatment of the filter
Degassing and sealing with a single heat treatment
As well as reducing the cost of degassing and sealing and sealing.
Degassing and sealing of packaging bags that can suppress processing defects
The point is to provide a law .

[0004]

In order to achieve the above-mentioned object, in the method for degassing and sealing a packaging bag according to the present invention, the opening of the heat-fusible packaging bag containing the powdery and granular materials is formed by the following method. ~
C. And then deaerated and sealed. A. A filter formed of a bag that is made of a material that can be thermally fused to the packaging bag and that has an air passage smaller than the particle diameter of the powder and granules is attached to the degassing nozzle that discharges air from the packaging bag.
Thereafter, the deaeration nozzle equipped with this filter is inserted into the packaging bag. B. After the opening of the left packaging bag inserting the nozzle degassed sealed and sandwiched by a pair of resilient clamping members, and the air in the packaging bag was discharged into a bag out through the filter and degassing nozzle, filter and packaged Hold the bag with a pair of elastic holding bodies
Pull out only the deaeration nozzle from the packaging bag while keeping it in place . C. Of the opening and filter of the degassed packaging bag,
A portion deviated to one side from the holding position by the elastic holding member is held by a pair of pressing members, and the opening of the held packing bag is heated by a heater, and the opening of the packing bag is removed together with the filter. Seal by heat fusion .

[0005]

[Function] Since the deaeration nozzle is equipped with a filter having an air passage smaller than the particle diameter of the granular material, when the air in the packaging bag is discharged, the granular material contained in the packaging bag is discharged. Is not exhausted with the air. And, after degassing, pinched a filter and a packaging bag by a pair of elastic clamping body
Only since withdrawn from the packaging bag degassing nozzle while,
Not only does the step of extracting the filter in close contact with the packaging bag become unnecessary, but also it is possible to prevent spilling of the powder and granules accompanying the extraction of an unnecessary filter that cannot be used next time due to clogging. And parcel
Is it possible to keep the bag and hermetic seal continuously?
Therefore, air does not flow back into the packaging bag . Moreover, the package
Of the opening of the bag and the filter,
The part deviated to one side from the clamping position by a pair of pressing bodies
And hold the opening of the packaged bag with a heater.
If it is possible to maintain the degassed state
Instead of the opening, the opening and the
Filter can be securely adhered to the filter.
Generation can be suppressed. In addition, the opening of the packaging bag together with the filter is made by a single heating process using a heater.
Since sealing is performed by heat sealing, the sealing process is
There is no need to separate the steps, and the filter material
The restrictions on fee selection can also be improved .

[0006]

Accordingly, the granular material stored in the packaging bag is
Uses a filter for degassing while preventing discharge
Nevertheless, heat the filter to the opening of the packaging bag.
One time by rationally devising the dressing process as described above
Can be efficiently degassed and sealed by heat treatment
At the same time, the cost of deaeration and sealing processing is reduced and sealing processing failure
Can be suppressed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for degassing and sealing a packaging bag according to the present invention will be described using a sealing machine with a vacuum (degassing) device having a well-known structure. (A) First, as shown in FIGS. 1 and 2, a polyethylene film packaging bag that can be heat-sealed to a degassing nozzle 2 that is provided to be movable back and forth with respect to a fixed frame 1. 3 is provided with an air passage smaller than the particle diameter of the fine powder (an example of a granular material) P accommodated in the bag 3 and is made of a polyethylene non-woven fabric which is heat- fusible with the packaging bag 3 in a bag shape. Is mounted. (B) As shown in FIG. 3, the opening 3A of the packaging bag 3 containing the fine powder P is placed between the pair of upper and lower pressing members 5A and 5B in the release position, and the pair of upper and lower members in the release position. It is inserted between the elastic holding members 6A and 6B, and the deaeration nozzle 2 equipped with the filter 4 is inserted into the packaging bag 3. (C) As shown in FIG. 4, the vertically oscillating arm 7 provided with the upper pressing body 5A and the upper elastic holding body 6A is swung downward by an actuator such as a manual operation or a solenoid to form a pair of upper and lower arms. The opening 3A of the packaging bag 3 is closed and sealed by the elastic holding bodies 6A and 6B while the deaeration nozzle 2 is inserted. (D) As shown in FIG. 5 and FIG.
Then, a vacuum pump connected via an electromagnetic valve or the like is activated, and the air in the packaging bag 3 is discharged out of the bag via the filter 4. When such a deaeration step is completed, a mechanism for moving the deaeration nozzle 2 in the front-rear direction is operated, and the filter
-4 and the opening 3A of the packaging bag 3 with a pair of elastic holding members 6
A and 6B hold only the deaeration nozzle 2 with the packaging bag
3, in other words, put the filter 4 in the packaging bag 3
And only the deaeration nozzle 2 is taken out of the packaging bag 3. (E) As shown in FIG. 6, the arm 7 is forcibly swung downward by another step to open the opening 3A of the degassed packaging bag 3.
Of these, the portion deviated to the bag bottom side, which is one side of the holding position by the elastic holding bodies 6A and 6B , is the pressing body 5
A, 5B, the heater 9 provided on the pressing surface of the lower pressing member 5B is energized, and the opening 3A of the packaging bag 3 held between the pressing members 5A, 5B and the position inside the opening 3A. The filter 4 to be heated is heated, and the opening 3A of the packaging bag 3 is heat- sealed together with the filter 4, as shown in FIG.
Note that reference numeral 8 in the drawing denotes silicone rubber provided on the pressing surface of the upper pressing body 5A. The drive structure of the pair of pressing members 5A and 5B, the drive structure of the pair of elastic holding members 6A and 6B, and the back-and-forth retracting structure of the deaeration nozzle 2 have conventionally been various types (for example, Fuji Impulse). (Product numbers FIA-1000NT, FR-400, etc., manufactured by Co., Ltd.) and have a well-known structure, and therefore description thereof will be omitted.

[Other Embodiments] In the above embodiment, the packaging bag 3 is made of polyethylene foil.
Film, polyvinyl chloride film, polyp
Even if it is composed of propylene film, nylon film, etc.
Good, and the filter 4 also corresponds to the material of the packaging bag 3
do itHeat fusionIt can be arbitrarily changed as far as possible.  Book
The degassing described in the claims of the invention means that the inside of the packaging bag 3
Is included in the range to make a vacuum state.  In the above embodiment
The upper pressing body 5 </ b> A and the upper
Attach the side elastic holding body 6A, and
Of the upper elastic holding member 6A by the downward swing of
The upper pressing body 5A is pressed by the second stage of downward swing.
We used a sealing machine configured to operate,
A driving mechanism for forcibly opening and closing the pressure bodies 5A and 5B,
Drive for forcibly opening and closing the two elastic holding bodies 6A, 6B
It may be carried out using a sealing machine equipped with a separate mechanism.
No.  The shape and length of the deaeration nozzle 2 are also intended for use.
Can be freely changed according to the deaeration nozzle 2
Insert the opening 3A of the packaging bag 3 with the elastic holding members 6
For deaeration to securely close in A and 6B in a sealed state
The cross-sectional shape of the nozzle 2 is configured as a flat cylinder to minimize the thickness
It is preferable to make it thin.  In the above embodiment,
The two elastic holding bodies 6A, 6B are located deeper than the two pressing bodies 5A, 5B.
On the side (the side where the deaeration nozzle 2 is located)Arranged, paraphrase
For example, the pressing members 5A and 5B are connected to one of the elastic holding members 6A and 6B.
On the bottom of the bagI used a sealing machine.
These elastic holding bodies 6A and 6B are separated from both pressing bodies 5A and 5B.
Also on the front sideThe pressing members 5A,
5B is the bag opening side which is one side of both elastic holding bodies 6A and 6B.
Located inYou may implement using a sealing machine.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part of a sealing machine before a filter is mounted.

FIG. 2 is an enlarged sectional view of a main part when a filter is mounted.

FIG. 3 is an enlarged sectional view of a main part when a packaging bag is set.

FIG. 4 is an enlarged sectional view of a main part showing a state in which an elastic holding body is held;

FIG. 5 is an enlarged sectional view of a main part at the time of degassing.

FIG. 6 is an enlarged cross-sectional view of a main part during heat fusion .

FIG. 7 is a perspective view of a degassed and sealed packaging bag.

[Explanation of symbols]

 2 Deaeration nozzle 3 Packaging bag 3A Opening 4 Filter 5A Pressing body 5B Pressing body 6A Elastic holding body 6B Elastic holding body 9 Heater P

Claims (1)

(57) [Claims] 1. An opening (3A) of a heat-sealable packaging bag (3) containing a granular material (P) is formed as follows. ~ C. The method of degassing and sealing the packaging bag to be degassed and sealed through the step of. A. The deaeration nozzle (2) for discharging air from the packaging bag (3) is formed in a bag shape from a material that can be thermally fused to the packaging bag (3), and the particle size of the powder (P) After installing a filter (4) with a smaller ventilation path,
The deaeration nozzle (2) equipped with the luter (4) is inserted into the packaging bag (3). B. With the deaeration nozzle (2) inserted, the opening (3A) of the packaging bag (3) is closed and sealed by a pair of elastic holding bodies (6A, 6B), and the air in the packaging bag (3) is released. After discharging the filter (4) and the deaeration nozzle (2) to the outside of the bag, the filter (4) and the packaging bag (3) are paired with a pair of elastic members.
Only the deaeration nozzle (2) is pulled out of the packaging bag (3) while being held by the holding bodies (6A, 6B) . C. The opening (3A) and the filter of the degassed packaging bag (3)
A portion of the luter (4) deviated to one side from the position of the elastic holding member (6A, 6B) is held by a pair of pressing members (5A, 5B), and the held packaging bag ( The opening (3A) of 3) is heated by the heater (9), and the opening (3A) of the packaging bag (3) is opened together with the filter (4).
Seal by heat fusion .