JPH08169416A - How to deaerate the packaging bag of the bag packaging machine - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to efficiently remove the air in a packaging bag filled with liquid or liquid and solids by using steam. [Structure] A method of degassing a packaging bag in which a filling material is filled while moving the packaging bag and steam is blown into the packaging bag before sealing the mouth to replace the air in the bag with steam and then sealing the mouth. At this time, a steam nozzle is inserted into the bag, the bag mouth is tightened by a tensioning means to perform steam injection, and when the steam nozzle is pulled out of the bag and sealed at the same time, a primary sealing step and a secondary sealing step are performed. It is characterized in that it is divided into two stages of a sealing process, and a line seal is performed at a position below the edge of the bag mouth in the primary sealing process, and a flat seal having a seal width including the line seal is performed in the secondary sealing process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for deaerating a packaging bag of a bag packaging machine, which uses steam to remove air in a packaging bag containing a liquid or a liquid and a solid.

[0002]

2. Description of the Related Art A prior art for filling a packaging bag from the product filling to the packaging sealing under the same conditions as described above is disclosed in JP-A-52-52.
As disclosed in No. 88481, a large amount of steam is used, the cost of the machine is high, and maintenance of the machine cannot be performed at all during operation.

[0003]

As an alternative method to the above, Japanese Patent Application Laid-Open No. 52-86890 is disclosed. In this method, as shown in FIGS. 9 (a) and 9 (b), a flat nozzle 7'is inserted into the packaging bag 1'in the step before sealing the mouth,
The bag mouth is strained laterally and steam is blown through the nozzle 7'to replace the air in the bag, and then the nozzle 7'is withdrawn and the bag mouth is moved to the next sealing step with the bag mouth being in a tensioned state. And seal the mouth. Then, the inside of the bag is evacuated by the vapor condensation. This method replaces the inside of the bag with steam, and the atmosphere easily enters the bag during the process of moving to the next mouth-sealing process, and this air becomes residual air even if the steam condenses, causing a quality problem. Become.

There is also a method of using a vacuum packaging machine as another method, but in this case, the apparatus cost is high, and in the case of a liquid material, bumping or boiling is likely to occur, resulting in poor sealing or poor appearance. In addition, there were drawbacks such as poor operating efficiency. Further, in general, a vacuum bag has a poor appearance in a vacuum state because a filling material is hardened on the bottom of the bag, and it is difficult to smooth the bag in a post process.

[0005]

An object of the present invention is to solve the above-mentioned problems, and while moving the packaging bag, a filling material (liquid) is filled and steam is blown into the packaging bag before the mouth-sealing. After replacing the air in the bag with steam, in the degassing method of the packaging bag to seal the mouth, insert a steam nozzle into the bag, after the bag mouth is tightened by the tensioning means and steam is injected, Characterized by sealing the mouth of the steam nozzle at the same time when it is pulled out of the bag,

The mouth seal for the bag mouth is divided into two stages, a primary seal process and a secondary seal process, and includes a line seal below the edge of the bag mouth in the primary seal process and the line seal in the secondary seal process. Characterized by performing a flat seal with a seal width,

Further, the bag mouth is cooled by a cooling device while the packaging bag is moving between the mouth sealing primary sealing step and the secondary sealing step,

In the steam injection step, the steam is blown toward the inner surface of the bag,

Further, the invention is characterized in that a prescribed amount of gas is blown into the bag after the end of steam injection.

Further, a steam nozzle is inserted into the bag, the bag mouth is tightened by a tensioning means, and the steam nozzle is ejected while following the rotary motion of the table, and then the steam nozzle is pulled out from the bag. At the same time, it is characterized by sealing the mouth,
Further, it is characterized in that steam is pre-injected into the bag in the bag opening step and the filling step of the filling material, and in the step after the pre-injection of steam is made to follow the table rotation operation into the packaging bag. The first injection of steam is performed, and the secondary injection of steam is performed while following the table rotation operation into the packaging bag after the completion of the first injection of steam. It provides a qi method.

[0011]

The present invention is constructed as described above, and after the steam nozzle is inserted into the bag and the steam is blown in the process of injecting the steam, the steam nozzle is taken out of the bag and at the same time, the mouth seal is formed. The air is effectively prevented from entering the bag at the time of sealing, and the sealing of the bag mouth is performed by a line seal in the primary sealing process and a seal including the line seal in the secondary sealing process. The width of the flat surface is sealed so that liquid does not get caught, so the clouding of steam does not occur on the sealing surface, and the bag mouth cools while the packaging bag moves between the primary sealing process and the secondary sealing process. Then, the curl at the mouth of the bag (steam heat or dripping of the mouth due to the hot plate) is removed, and the wrinkle seal cannot be performed. It is thrown in and air can not accumulate in the bag Te or less is in the substitution of air and steam are sufficiently and efficiently performed.

Further, in the steam injection process, the steam is injected toward the inner surface of the bag so that the liquid is not scattered and the injection pressure can be increased to enhance the degassing effect. In addition, a specified amount of gas is blown into the bag following the end of steam injection, and the amount of gas required to enhance the sterilization effect by controlling the convection inside the bag of the filler during heat sterilization. Will remain in the bag, and the shape of the filling bag will be adjusted at the end of steam injection or during the secondary sealing process without any damage, and the external shape will be good without damaging or damaging the filling inside. A packaging bag becomes possible, or a steam nozzle is inserted into the bag before moving the table, and steam is blown while following the table operation until the next sealing process. Sealed seal is done Ingress of air is effectively prevented to the bag during Lumpur.

[0013]

EXAMPLE An example of the present invention will be described with reference to FIGS. FIG. 1 is an overall view of an automatic bagging packaging system to which the present invention is applied, FIG. 2 is a main part of a steam injection nozzle, FIG. 3 is a bag expansion restriction and excess steam extrusion mechanism, and FIG. 4 is a mouth seal. FIG. 5 shows the procedure of the bag mouth cooling method, FIG. 6 shows the main part of the gas injection nozzle, FIG. 7 shows the details of the tip of the injection nozzle, and FIG. 8 shows the procedure of the degassing method of the present invention. Show.

As shown in FIG. 1, the automatic bag filling system according to the present invention picks up the bags 1 in the bag storage device 21 one by one and transfers them to the table-side gripping claws 2a, 2b (I). ), A marking step (II) of marking the manufacturing date of the filling (liquid) on the surface of the bag 1 with the marking device 22, the suction cup 10a,
The opening step (III) of opening the mouth of the bag 1 by 10b, the filling liquid and the filling material are filled into the bag 1 through the filling machine 23 and the hopper 24, and the vapor preliminary injection device 2 is also applied to the bag 1.
Filling (liquid) filling step (I
V) and (V), following the operation of the table 20, the primary injection steps (VI) to (VI) in which the primary injection of steam by the primary steam injection device 6 is performed on the filling bag 1 before the sealing of the mouth.
I), secondary injection of steam by the secondary steam injection device 7 and secondary injection steps (VII) to (VIII) for blowing a specified amount of gas into the bag and shaping the filling bag, and a line sealing line mouth Primary sealing step VIII, secondary sealing step for sealing the bag mouth (flat sealing) (IX), and cooling / discharging step (X) for cooling the packaged bag 1 and then discharging the bag 1 to the outside. It is composed of. In the above system, while the bag 1 is held by the holding claws 2a and 2b and is hung, the bag 1 is rotated together with the table 20, and various packaging operations are automatically executed continuously in each of the above steps.

FIG. 2 shows a steam primary injection device 6 and a steam secondary injection device 7 for the bag, both devices 6, 7 being arms 7f, 7 respectively.
It is configured integrally with the elevating mechanism 7c through the e, elevating the elevating mechanism 7c to cover the bag mouth of the bag 1 with the hood 6a of the primary injection device 6, and to cover the steam nozzle 7a of the secondary injection device 7 with the bag. After being inserted into the bag 1, steam is primarily and secondarily injected into the bag 1 through the steam flow pipes 6b and 7b. Further, the elevating mechanism 7c rotates around the base point O, interlocks with the table 20, follows the steps (VI) to (VIII) and the steps (VII) to (VIII), and returns to the original position. Take action.

6 to 7 show the details of the steam nozzle portion of the steam secondary injection device 7. A steam flow pipe 7b and a gas flow pipe 7g are connected to the steam nozzle 7a, and at the time of the secondary steam injection. After the secondary injection is finished, a prescribed amount of gas (such as nitrogen gas) is blown into the bag through the nozzle 7a. As shown in FIG. 7, the injection port 7d at the tip of the steam nozzle 7a is opened toward the side surface of the bag 1, so that steam or gas is injected toward the inner surface of the bag. ing.

FIG. 3 shows a surplus steam extruding mechanism, in which the head space portion is pinched by the extruding plates 17a and 17b at the time of the primary sealing of the mouth, and the surplus steam in the space is extruded. FIG. 4 shows the types of sealing seals to be applied to the bag mouth. The primary seal is the line seal 1a below the edge of the bag mouth as shown in (a), and the secondary seal is as shown in (b). The plane seal 1b is provided at a position including the collinear seal.

FIG. 5 shows a state in which the bag mouth portion is cooled by the cooling device 27 while the primary-sealed bag 1 moves to the secondary-sealing step, and then the secondary-sealing is performed. The rim above the seal position is curled by being warmed by steam or a hot plate (drooping) (Fig. A), and by cooling this rim, the curled state (dull) is corrected. After that (FIG. B), the flat plates are sealed by the heat plates 4a and 4b (FIG. C).

The procedure of the degassing method of the present invention will be described below with reference to FIG. First, the bags 1 in the bag storage device 21 are picked up one by one and delivered to the gripping claws 2a and 2b on the table 20 side (process I), and then the marking device 22 is used to print the food on the surface of the bag 1 The date and the like are stamped (step II), and then the bag mouth is opened by the suction cups 10a and 10b (step III).
Then, the bag 1 is filled with the filling liquid through the filling machine 23 (I
(V step), and subsequently, solid matter is charged through the hopper 24 (V step). By the time when the bag mouth is opened and the solid substance is charged, the steam preliminary injection device 25 pre-injects steam into the bag to prevent entry of germs into the bag,
Then, the bag mouth of the bag 1 filled with the filling liquid and charged with the solid substance is covered with the hood 6a of the steam primary injection device 6, and the steam secondary is added to the preceding bag 1 in which the primary injection of the steam has already finished. The steam nozzle 7a of the injection device 7 is inserted, and the steam flow pipe 6
The primary injection of steam (process VII) and the secondary injection of steam (process VIII) are performed simultaneously through b and 7b. In addition, each device 6,
The primary injection (between VI and VII steps) and the secondary injection (VII to V) of steam while following the rotating table 20
III step)) are performed simultaneously. By this primary injection, a steam atmosphere is created near the bag mouth, and the steam replacement rate by the next secondary injection is improved. Further, the substitution rate is further improved by continuously injecting steam by following the table operation from the previous step.

When vapor injection is completed in the mouth-sealing primary sealing step, the pushing plates 17a and 17b of the pushing device are actuated to press both sides of the bag mouth, pushing the steam nozzle 7a while pushing the excess steam in the head space of the bag 1. Take out from bag 1 (VI
Step II). By this operation, the reverse invasion of air into the bag is prevented, and the amount of residual steam is kept substantially constant. At the end of this secondary injection, a specified amount of gas is separately blown into the bag 1 through the gas flow pipe 7g shown in FIGS. 6 and 7, whereby convection of the liquid filling in the bag is controlled and the heat sterilization effect is obtained. It is also possible to make a packaging bag in which a predetermined amount of gas (nitrogen gas or the like) required to raise the gas remains in the bag. At the same time when the secondary injection is finished and the steam nozzle 7a is taken out, the hot plates 3a and 3b perform the primary sealing (line seal) of the bag mouth, and then the hot plate 4
The mouth sealing secondary seal (plane seal) is performed by a and 4b (steps VIII to IX), but this plane seal is performed at a position including the line seal. At this time, the bag mouth is cooled by the cooling device 27 while the primary-sealed bag 1 is moving to the secondary sealing step.
By the cooling, the curl (drip) at the edge of the bag is corrected, and then the bag is sealed, so that the seal part is well sealed without wrinkles. Further, the steam injection and the gas injection from the steam nozzle 7a are performed toward the inner surface of the bag 1 as shown in 7d of FIG. 7, so that the liquid in the bag is not scattered and the blowing pressure is adjusted. It can be raised and the degassing effect will be improved.

[0021]

As described in detail above, according to the degassing method of the present invention, it is possible to reduce the packaging cost by saving the space of the mechanical device and optimizing the amount of steam used.
In addition, by performing preliminary injection prior to the primary and secondary injection of steam into the bag, and performing continuous steam injection from the primary injection process to the secondary injection process, the replacement ratio of steam and air in the bag is significantly increased. Get better In particular, after the primary injection, the steam injection is performed while the steam nozzle is inserted into the bag and the sealing process is followed, so that a sufficient steam replacement time can be secured during the movement. Further, at the end of the secondary injection of steam, the excess steam in the head space of the bag body is extruded and sealed by the primary mouth-sealing, so that the invasion of air into the bag is prevented and the residual steam becomes almost constant.

In addition, a prescribed amount of gas is blown into the bag following the end of steam injection to control convection of the filling material in the bag during heat sterilization to eliminate product deterioration due to overheat sterilization and insufficient sterilization. . In addition, by shaping the bag at the time of sealing the mouth, the shaping operation is easy and a good deaeration bag can be obtained. Further, the primary seal is a line seal to prevent steam from being caught in the sealing surface, and the cooling device removes the curl at the bag mouth, thereby eliminating defective sealing. Further, by performing the steam injection and the small air injection toward the inner surface of the bag, the liquid is not scattered and the injection pressure can be kept high, so that the deaeration efficiency is also improved. Further, there are effects such as maintenance and cleaning work being easy during operation, and high quality packaged food having a uniform appearance and no residual air can be efficiently produced.

[Brief description of drawings]

FIG. 1 is an overall view of an automatic bagging packaging system to which the present invention is applied.

FIG. 2 is a diagram showing a main part of a steam injection nozzle to which the present invention is applied.

FIG. 3 is a diagram showing a surplus vapor pushing mechanism of a bag to which the present invention is applied.

FIG. 4 is a view showing a sealing condition of a mouthpiece to which the present invention is applied.

FIG. 5 is a diagram showing a procedure of a cooling method to which the present invention is applied.

FIG. 6 is a diagram showing a main part of a gas injection nozzle to which the present invention is applied.

FIG. 7 is a diagram showing a main part of a steam nozzle to which the present invention is applied.

FIG. 8 is a diagram showing a procedure of a degassing method to which the present invention is applied.

FIG. 9 is a diagram showing a conventional degassing method.

[Explanation of symbols]

 1 bag 2a, 2b gripping claws 3a, 3b hot plate 4a, 4b hot plate 6 steam primary injection device 6a hood 7 steam secondary injection device 7a steam nozzle 6b, 7b steam distribution pipe 7c lifting mechanism 7d injection port 7e, 7f arm 7g Gas flow pipes 17a, 17b Extrusion plate 17c Operating mechanism 17 Extrusion device 20 Table 21 Bag holder 22 Marker 23 Filling machine 24 Hopper 25 Steam preliminary injection device

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[Procedure amendment]

[Submission date] July 20, 1995

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

FIG.

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Correction target item name] Figure 8

[Correction method] Change

[Correction content]

[Figure 8]

Claims (7)

[Claims] 1. The packing is filled while moving the packaging bag, and steam is blown into the packaging bag before sealing the mouth to replace the air in the bag with the steam, and then the packaging bag to be sealed is removed. In the air method, a steam nozzle is inserted into the bag, the bag mouth is tensioned by a tensioning means to perform steam injection, and when the steam nozzle is withdrawn from the bag and sealed at the same time, a primary sealing step is performed. A bag-sealed package characterized by being divided into two stages of a secondary sealing process, and performing a line seal at a position below the edge of the bag mouth in the primary sealing process and a flat seal having a seal width including the line seal in the secondary sealing process. How to deaerate the packaging bag of the machine. 2. The packaging bag of a bag filling and packaging machine according to claim 1, wherein the bag mouth is cooled by a cooling device while the packaging bag is moving between the mouth-sealing primary sealing step and the secondary sealing step. How to degas. 3. The steam injecting step is characterized in that the steam is blown toward the inner surface of the bag.
A method for degassing a packaging bag of the bag packaging machine described. 4. The degassing method for a packaging bag of a bag packaging machine according to claim 1, wherein a prescribed amount of gas is blown into the bag after the end of the steam injection. 5. A steam nozzle is inserted into the bag, the bag mouth is tightened by a tensioning means, the steam nozzle is ejected while following the rotary motion of the table, and then the steam nozzle is withdrawn from the bag. The method for degassing a packaging bag of a bag packaging machine according to claim 1, wherein the mouth sealing is performed at the same time. 6. The steam is pre-injected into the bag in the bag opening step and the filling material filling step.
A method for degassing a packaging bag of the bag packaging machine described. 7. A primary injection of steam is performed while following the table rotating operation into the packaging bag in the step after the completion of the preliminary injection of steam, and the table is moved into the packaging bag after the completion of the primary injection of steam. The method for degassing a packaging bag in a bag packaging machine according to claim 1, wherein the secondary injection of steam is also performed while following the dynamic operation.