JP2004181882A - Bag making machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To preheat and soften a zipper 2 without fail before it is collapsed, even when the zipper seal 2 is different in shape and size in a bag making machine which manufactures a zipper bag from a plastic sheet 1 and the zipper 2 by incorporating the zipper 2 to the plastic film 1. <P>SOLUTION: A high temperature gas is blown to the plastic film 1 and the zipper 2 to preheat and soften the zipper 2 before the zipper 2 is collapsed at the side seal position of the plastic film 1. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
[Industrial applications]
The present invention relates to a bag making machine for manufacturing a chuck bag.
[0002]
[Prior art and its problems]
Bag making machines for producing chuck bags are generally known and used. In a zipper bag making machine, a zipper is built into a plastic film, and the zipper bag is manufactured by the plastic film and the zipper. In this case, for example, as described in Japanese Patent No. 2833990 (Patent Document 1), it is necessary to crush the chuck at the horizontal sealing position of the plastic film. In connection with this problem, in the bag making machine disclosed in the publication, the upper and lower heating members face each other, and a recess is formed on the lower surface of the upper heating member. The recess corresponds to the shape of the chuck. Then, before the chuck is crushed, the plastic film and the chuck are guided between the upper and lower heating members, the upper heating member descends toward the lower heating member, and the plastic film and the chuck are housed in the concave portions of the upper heating member. The upper and lower heating members preheat and soften the chuck. Thereafter, the chuck is crushed at the horizontal sealing position of the plastic film. Therefore, the chuck can be properly crushed, and the plastic film can be properly laterally sealed, and no defective sealing occurs.
[0003]
However, only the chuck of a specific shape and size can be accommodated in the concave portion of the upper heating member of the publication and can be adapted. Thus, there is the problem that the chuck must be of different shape or size and must be replaced each time the upper and lower heating members preheat and soften it. Further, in order to lower the upper heating member toward the lower heating member and to accommodate and fit the chuck in the recess of the upper heating member, the recess of the upper heating member and the chuck must be precisely aligned, High accuracy is required. When a misalignment occurs between the recess of the upper heating member and the chuck, the chuck is not accommodated in the recess of the upper heating member and does not fit. Therefore, the chuck cannot be properly preheated and softened. The chuck may be stepped on by the upper heating member and may be deformed, which may cause poor sealing.
[0004]
In addition, in the bag making machine of the publication, when the chuck is housed in the recess of the upper heating member, the plastic film is pushed and bent by the upper heating member around the chuck and deformed. However, as described in JP-A-9-66947 (Patent Document 2), an aluminum foil may be used for an intermediate layer of a plastic film. In this case, when the plastic film is pressed and bent by the upper heating member and deformed, the aluminum foil may be damaged thereby.
[0005]
[Patent Document 1]
Japanese Patent No. 2833990 [0006]
[Patent Document 2]
JP-A-9-66947
[Object of the invention]
Therefore, the present invention incorporates a chuck into a plastic film, and in a bag making machine that manufactures a chuck bag using the plastic film and the chuck, even if the chuck has a different shape or size, it can be properly removed before the chuck is crushed. The purpose of the present invention is to prevent the chuck from being preheated, softened, and have a positional accuracy of the chuck, and to prevent the aluminum foil from being damaged even if the intermediate layer of the plastic film is used.
[0008]
Configuration of the Invention
According to the present invention, the chuck is crushed at the horizontal sealing position of the plastic film as in the related art. Furthermore, a hot gas injection nozzle is specially provided, and before the chuck is crushed, the hot gas is blown onto the plastic film and the chuck, and the hot gas preheats and softens the chuck.
[0009]
An infrared radiation device may be used in place of the hot gas injection nozzle, and the plastic film and the chuck may be irradiated with infrared light before the chuck is crushed, and the chuck may be preheated and softened by the infrared light.
[0010]
In a preferred embodiment, the means for crushing the chuck comprises a point heater. Then, the point heater is pressed against the plastic film and the chuck, the chuck is heated by the point heater, and crushed. Thereafter, the horizontal seal bar is pressed against the plastic film and the chuck, and the plastic film is heated by the horizontal seal bar. Is done.
[0011]
In another embodiment, the means for crushing the chuck comprises a transverse seal bar. Then, the horizontal seal bar is pressed against the plastic film and the chuck, and the plastic film is heated and horizontally sealed by the horizontal seal bar, and at the same time, the chuck is heated and crushed by the horizontal seal bar.
[0012]
[Explanation of the embodiment]
Hereinafter, embodiments of the present invention will be described.
[0013]
FIG. 1 shows a bag making machine according to the present invention. This bag making machine is for manufacturing a chuck bag, and as shown in FIGS. 2 and 3, the plastic film 1 is superimposed on two layers and the chuck 2 is incorporated therein. Is the same as Chuck 2 is composed of a male member and a female member, is disposed between both layers of plastic film 1, the male member and the female member are engaged with each other, and the tape is heat-sealed to both layers of plastic film 1. It is similar to that of
[0014]
Further, the plastic film 1 and the chuck 2 are guided to the horizontal seal bars 3 and 4, the cooling bars 5 and 6, and the feed roller 7, and the feed roller 7 intermittently feeds the plastic film 1 and the chuck 2; The horizontal seal bar 3 is pressed against the plastic film 1 and the chuck 2, and the plastic film 1 is heated by the horizontal seal bar 3, and is horizontally sealed to form a horizontal seal portion. Furthermore, after the horizontal sealing, each time the plastic film 1 is intermittently fed, the horizontal sealing portion reaches the horizontal sealing bar 4, the horizontal sealing bar 4 is pressed against the plastic film 1 and the chuck 2, and the plastic film 1 is horizontally sealed again. . Thereafter, each time the plastic film 1 is intermittently fed, the horizontal seal portion reaches the cooling bar 5, the cooling bar 5 is pressed against the plastic film 1 and the chuck 2, and the plastic film 1 and the chuck 2 are cooled by the cooling bar 5. Thereafter, each time the plastic film 1 is intermittently fed, the horizontal sealing portion reaches the cooling bar 6, the cooling bar 6 is pressed against the plastic film 1 and the chuck 2, and the plastic film 1 and the chuck 2 are cooled again. Thereafter, each time the plastic film 1 is intermittently fed, the horizontal seal portion reaches the cutter 8, and the plastic film 1 and the chuck 2 are cut by the cutter 8. Therefore, a zipper bag is manufactured by the plastic film 1 and the zipper 2.
[0015]
Further, in this bag making machine, the chuck 2 is crushed at the horizontal sealing position of the plastic film 1. The means for crushing the chuck 2 includes a point heater 9 and is arranged at an upstream position of the horizontal seal bar 3. Then, each time the plastic film 1 is intermittently fed, the point heater 9 is pressed against the plastic film 1 and the chuck 2, and the chuck 2 is heated and crushed by the point heater 9. Thereafter, each time the plastic film 1 is intermittently fed, the crushed portion reaches the horizontal seal bar 3, and the horizontal seal bar 3 is pressed against the plastic film 1 and the chuck 2. Therefore, at the position where the chuck 2 is crushed, the plastic film 1 is heated by the horizontal seal bar 3 and is horizontally sealed. At the same time, the horizontal seal bar 3 acts on the chuck 2, and the chuck 2 is completely crushed.
[0016]
Furthermore, in this bag making machine, the high-temperature gas injection nozzle 10 is arranged at a position upstream of the point heater 9, and the high-temperature gas is injected from the injection nozzle 10 every time the plastic film 1 is intermittently fed before the chuck 2 is crushed. Then, the plastic film 1 and the chuck 2 are sprayed, and the chuck 2 is preheated and softened by a high-temperature gas. Thereafter, each time the plastic film 1 is intermittently fed, the preheated and softened portion reaches the point heater 9, and the point heater 9 is pressed against the plastic film 1 and the chuck 2. Therefore, the chuck 2 is heated and crushed by the point heater 9 at the position where the chuck 2 is preheated and softened.
[0017]
In short, in this bag making machine, the chuck 2 is preheated and softened by the high-temperature gas, then crushed by the point heater 9, and then the plastic film 1 is horizontally sealed by the horizontal seal bar 3. Therefore, the chuck 2 can be properly crushed, and the plastic film 1 can be accurately laterally sealed, and no defective sealing occurs.
[0018]
Further, in the case of this bag making machine, a high-temperature gas may be sprayed on the plastic film 1 and the chuck 2, and there is no problem even if the chuck 2 has a different shape or size. Regardless of the shape or size of the chuck 2, it can be properly preheated and softened. There is no problem of the positional accuracy of the chuck 2. Further, a high-temperature gas is blown onto the plastic film 1 and the chuck 2, whereby the plastic film 1 is also preheated and softened. Therefore, even if the aluminum foil is used for the intermediate layer of the plastic film 1, when the chuck 2 is subsequently crushed by the point heater 9, the aluminum foil is not damaged. Moreover, the configuration is simple and the cost is low.
[0019]
FIG. 4 shows another embodiment. In this embodiment, the means for crushing the chuck 2 comprises a horizontal seal bar 3, and the high-temperature gas injection nozzle 10 is arranged at an upstream position of the horizontal seal bar 3. Then, before the chuck 2 is crushed, each time the plastic film 1 is intermittently fed, a high-temperature gas is injected from the injection nozzle 10 and sprayed on the plastic film 1 and the chuck 2, and the high-temperature gas preheats and softens the chuck 2. .
[0020]
Thereafter, each time the plastic film 1 is intermittently fed, the preheated and softened portion reaches the horizontal seal bar 3, the horizontal seal bar 3 is pressed against the plastic film 1 and the chuck 2, and the plastic film 1 is moved by the horizontal seal bar 3. The lateral seal is performed, and at the same time, the chuck 2 is crushed by the lateral seal bar 3. Therefore, the chuck 2 can be properly crushed, and the plastic film 1 can be accurately laterally sealed, and no defective sealing occurs.
[0021]
As shown in FIG. 5, a high-temperature gas injection nozzle 10 is disposed near the horizontal seal bar 3, and the plastic film 1 is horizontally sealed. Before the chuck 2 is crushed, the high-temperature gas is blown to the plastic film 1 and the chuck 2 to crush the high-temperature gas. The chuck 2 may be preheated and softened. After that, the horizontal seal bar 3 is pressed against the plastic film 1 and the chuck 2 to thereby seal the plastic film 1 horizontally. Even if the chuck 2 is crushed, the chuck 2 is properly crushed and the plastic film 1 is properly sealed horizontally. Can be.
[0022]
In each embodiment, high-temperature air may be used as the high-temperature gas, or an inert gas may be used. Regarding the temperature, for example, if the gas is a high-temperature gas of about 450 ° C., the chuck 2 can be preheated and softened by that, and thereafter, the chuck 2 can be properly crushed. This has already been confirmed by experiments.
[0023]
When the temperature of the high-temperature gas is too high, if the high-temperature gas is constantly sprayed and sprayed on the plastic film 1 and the chuck 2, the plastic film 1 may be adversely affected. The same applies if the distance between the injection nozzle 10 and the plastic film 1 is too small. Therefore, a shutter 11 is provided in the injection nozzle 10, and at every intermittent feeding of the plastic film 1, while the plastic film 1 is stopped, the injection nozzle 10 is opened by the shutter 11 to inject high-temperature gas, and the high- Is preferably preheated and softened. Then, while the plastic film 1 is being intermittently fed, the injection nozzle 10 is closed by the shutter 11 so that the high-temperature gas is not injected, the high-temperature gas is blown at the horizontal sealing position of the plastic film 1 to preheat the chuck 2, The plastic film 1 can be softened, and the high-temperature gas is not blown to other parts, and the plastic film 1 is not adversely affected. While the plastic film 1 is being intermittently fed, the shutter 11 may restrict the ejection nozzle 10 to restrict the flow rate thereof so that the plastic film 1 is not adversely affected.
[0024]
As shown in FIG. 6, the injection nozzle 12 is formed in the point heater 9, and before the chuck 2 is crushed, a high-temperature gas is injected from the injection nozzle 12 and sprayed on the plastic film 1 and the chuck 2, and the chuck 2 is preheated by the high-temperature gas. Then, it may be softened. In the embodiment of FIG. 5, an injection nozzle is formed in the horizontal seal bar 3 and a high-temperature gas is sprayed on the plastic film 1 and the chuck 2 before the chuck 2 is crushed, so that the high-temperature gas preheats and softens the chuck 2. Is also good.
[0025]
In the embodiment of FIG. 7, an infrared irradiation device 13 is used in place of the injection nozzle. Before the chuck 2 is crushed, the plastic film 1 and the chuck 2 are irradiated with infrared light, and the chuck 2 is preheated and softened by the infrared light. I do. Thereafter, the point heater 9 or the horizontal seal bar 3 is pressed against the plastic film 1 and the chuck 2, and the chuck 2 is crushed by the point heater 9 or the horizontal seal bar 3.
[0026]
Therefore, also in the embodiment shown in FIG. 7, the chuck 2 can be properly crushed, and the plastic film 1 can be properly laterally sealed. Furthermore, it is sufficient to irradiate infrared rays to the plastic film 1 and the chuck 2, and even if the chuck 2 has a different shape or size, it can be appropriately preheated and softened. There is no problem of the positional accuracy of the chuck 2. The plastic film 1 is also preheated and softened by infrared rays, and there is no risk of damaging it even if an aluminum foil is used for the intermediate layer of the plastic film 1. Moreover, the configuration is simple and the cost is low.
[0027]
【The invention's effect】
As described above, according to the present invention, even if the chuck 2 has a different shape or size, it can be properly preheated and softened. There is no problem of the positional accuracy of the chuck 2. Even if an aluminum foil is used for the intermediate layer of the plastic film 1, there is no possibility that it will be damaged. Moreover, the structure is simple, the cost is low, and the intended purpose can be achieved.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of the present invention.
FIG. 2 is a plan view of the bag making machine of FIG.
FIG. 3 is a cross-sectional view of a hot gas injection nozzle, a plastic film, and a chuck of FIG. 2;
FIG. 4 is a side view showing another embodiment.
FIG. 5 is a side view showing another embodiment.
FIG. 6 is a sectional view showing another embodiment.
FIG. 7 is a side view showing another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Plastic film 2 Chuck 3, 4 Horizontal seal bar 9 Point heater 10, 12 Hot gas injection nozzle 13 Infrared irradiation device

Claims (4)

A bag making machine that incorporates a chuck into a plastic film and manufactures a chuck bag with the plastic film and the chuck,
Means for crushing the chuck at the horizontal sealing position of the plastic film,
A bag making machine, comprising: a high-temperature gas injection nozzle for blowing a high-temperature gas onto the plastic film and the chuck before crushing the chuck, and preheating and softening the chuck by the high-temperature gas. A bag making machine that incorporates a chuck into a plastic film and manufactures a chuck bag with the plastic film and the chuck,
Means for crushing the chuck at the horizontal sealing position of the plastic film,
An infrared irradiation device for irradiating the plastic film and the chuck with infrared rays before crushing the chuck, and preheating and softening the chucks with the infrared rays. The means for crushing the chuck comprises a point heater, pressing the point heater against the plastic film and the chuck, heating the chuck with the point heater and crushing, and then pressing a horizontal seal bar against the plastic film and the chuck. The bag making machine according to claim 1 or 2, wherein the plastic film is heated by a horizontal seal bar to perform horizontal sealing. The means for crushing the chuck comprises a horizontal seal bar, presses the horizontal seal bar against the plastic film and the chuck, heats the plastic film with the horizontal seal bar, performs horizontal sealing, and simultaneously seals the chuck with the horizontal seal bar. The bag making machine according to claim 1, wherein the bag making machine is heated and crushed.

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