JPH0995311A - Method for deaerating packaging bag of filling-closing packaging apparatus - Google Patents

Abstract

PURPOSE: To effectively prevent air from entering a bag at the time of sealing by a method wherein after a steam nozzle is inserted into a packaging bag, also a bag mouth is extended and steam is ejected, a mouth seal is applied simultaneously with the nozzle being removed. CONSTITUTION: The mouth of a bag 1 filled with filling liquid and a solid put in is covered by a hood 6a of a primary steam ejector 6, or a steam nozzle 7a of a secondary steam ejector 7 is inserted into a preceding bag 1 which has already completed with primary ejection of steam, so that primary and secondary ejection of steam is simultaneously performed through steam passage tubes 6b, 7b. When steam ejection is completed push-out plates 17a, 17b are operated to press both sides of the bag mouth, and the steam nozzle 7a is removed from the bag 1 while excessive steam in a head space of the bag 1 is being pushed out. This operation prevents air from reversely entering the bag, while a residual steam volume is held approximately constant. In addition, as soon as the steam nozzle 7a is removed with steam ejection completed, the bag mouth is sealed by hot plates 3a, 3b.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A prior art for filling a packaging bag from packaging to sealing is disclosed in Japanese Patent Application Laid-Open No. 52-88481, but the amount of steam used is large and the cost of the machine is high. I can't do it at all while driving.

[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. 7 (a) and 7 (b), a flat nozzle 7'is inserted into the packaging bag 1'in the process 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is strained laterally and steam is blown through the nozzle 7'to replace the air in the bag, and then the nozzle 7'is withdrawn and the bag mouth is moved to the next sealing step with the bag mouth being in a tensioned state.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.

As another method, there is a method of using a vacuum packaging machine, but in this case, the cost of the apparatus 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]

DISCLOSURE OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and when the packaging bag is moved, the packaging bag is filled with a filling material (liquid) and the packaging bag is sealed before sealing. When blowing steam into the bag to replace the air in the bag with steam and seal the mouth, insert a steam nozzle into the packaging bag, tighten the bag mouth with a tensioning means and inject steam, and then Characterized by sealing the mouth at the same time it is taken out of the bag,

In addition, when filling the filling material, the liquid material is filled first, and then the solid material is added.

At the end of steam injection or when sealing the mouth,
The shaping bag is shaped by a shaping device.

[0008]

The present invention is configured as described above, and in the process of injecting steam, after the steam nozzle is inserted into the bag to inject the steam, the steam nozzle is withdrawn from the bag and at the same time the mouth is sealed. The sealing is effectively performed and effectively prevents the air from entering the bag at the time of sealing. In addition, in the filling process, after filling the liquid material in advance, the solid material is added, so that the air accumulation in the bag is eliminated or reduced, and the replacement of air and vapor is sufficient and efficient. To be done.

In addition, the filling bag is shaped without difficulty at the end of steam injection or during the sealing process, so that a packaging bag with a good outer shape can be formed without damaging or damaging the filling material inside. .

[0010]

Embodiments of the present invention will be described with reference to the drawings. 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 main part of the shaping device, and FIG. 6 shows the procedure of the degassing method of the present invention.

As shown in FIG. 1, in the automatic bag filling packaging system according to the present invention, a bag feeding step (I) for picking up the bags 1 in the bag storing device 21 one by one and delivering them to the table-side gripping claws 2a, 2b. ), 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 steam is jetted to the bag 1 (the device is not shown). Filling (liquid) filling steps (IV) and (V), and an injection step (VI) of performing steam injection to the filling bag 1 before sealing the mouth while following the operation of the table 20.
(VIII), and a sealing step (I
X), and a cooling / discharging step (X) of cooling the packaged bag 1 and then discharging the bag 1 to the outside.

In the above system, the bag 1 has gripping claws 2a and 2b.
In the state of being grasped and suspended by, while rotating with the table 20, 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
It is configured integrally with the elevating mechanism 7c via 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 about the base point O and interlocks with the table 20 to move between steps (VI) to (VII) and (V).
The operation of following III) and returning to the original position is performed.

FIG. 3 shows a surplus steam extruding mechanism, in which the head space is pinched by the extruding plates 17a and 17b at the time of sealing and sealing the surplus steam in the space. Further, FIG. 4 shows the types of sealing seals to be applied to the bag mouth, and shows the line seal 1a and the plane seal 1b.

FIG. 5 shows a shaping device 25 for shaping the filling bag 1.
, The moving mechanism 25c is operated inward to move the pressing plate 25
The bag body is pinched by a and 25b to shape the outer shape of the bag.

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 the bag mouth is opened and the solid matter is thrown in, steam is pre-injected into the bag by the steam pre-injection device (not shown) to prevent entry of various bacteria 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 primary injection of steam (V
II step) and the secondary injection (VIII step) are performed simultaneously. Further, the primary injection (between VI and VII steps) and the secondary injection (between VII and VIII steps) of steam are simultaneously performed while causing the devices 6 and 7 to follow the rotating table 20. 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 steam injection is completed in the mouth-sealing step, the extruding plates 17a and 17b of the extruding device are actuated to press both side surfaces of the bag mouth to extrude the surplus steam in the head space of the bag 1 while the steam nozzle 7a is held in the bag. 1 (Step VIII). By this operation, the reverse invasion of air into the bag is prevented, and the amount of residual steam is kept substantially constant. or,
At the same time when the steam injection is completed and the steam nozzle 7a is taken out, the hot plates 3a and 3b seal the bag mouth (steps IX to X). In addition, before and after the end of steam injection in the sealing step, or at the time of sealing the mouth, the outer shape of the bag is shaped by pressing the bag body from both sides with the pressure plates 25a and 25b of the shaping device 25. A good packaging bag can be made.

[0018]

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 Further, by performing the steam injection while following the sealing sealing process with the steam nozzle inserted in the bag from the secondary injection process, 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.

By shaping the bag at the time of sealing the mouth, the shaping operation is easy and a good deaeration bag can be obtained. or,
This has the effect of facilitating maintenance and cleaning work during operation, and efficiently produces a high-quality packaged food product with a uniform appearance and no residual air.

[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 main part of a shaping device to which the present invention is applied.

FIG. 6 is a diagram showing a procedure of a degassing method to which the present invention is applied.

FIG. 7 is a diagram showing a conventional degassing method.

[Explanation of symbols]

 1 Bag 2a, 2b Grip claw 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 flow pipe 7c Elevating mechanism 7e, 7f Arm 17a, 17b Extrusion Plate 17c Operating mechanism 17 Extruder 20 Table 21 Bag holder 22 Marker 23 Filling machine 24 Hopper 25 Shaping device 25a, 25b Clamping plate

Claims (4)

[Claims] 1. When the packaging bag is filled with a filling material 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 to seal the mouth.
A package for a bag-filling packaging machine characterized by inserting a steam nozzle into the packaging bag, tensioning the bag mouth with a tensioning means and injecting steam, and then removing the steam nozzle from the bag and sealing the mouth at the same time. How to degas the bag. 2. The degassing method for a packaging bag of a bag packaging machine according to claim 1, wherein the filling of the liquid material is performed first and then the solid material is introduced when the filling material is filled. 3. The degassing method for a packaging bag of a bag packaging machine according to claim 1, wherein the shaping bag is shaped by a shaping device at the end of steam injection or at the time of sealing the mouth. 4. A method for degassing a packaging bag of a bag-filling packaging machine, characterized in that the excess steam in the head space of the bag is extruded by the extruding device during the secondary injection of steam in the primary sealing process of the mouthpiece. .