KR20010085289A - Cutting blade for bag-making device, bag-making device, method of manufacturing packaging bag, and packaging bag manufactured using the bag-making method - Google Patents

Abstract

5A of cutting teeth formed along the cutting direction of the packaging bag, and notch forming teeth 5B formed on both sides of the cutting teeth 5A orthogonal to the cutting direction and sandwiching the cutting teeth 5A. It is set as the cutting blade 5 for bag manufacturing apparatuses. Therefore, the packaging bag is cut by the cutting teeth 5A, and at the same time, the notch is formed accurately without shifting the film to one side during the formation of the notch, so that easy opening property can be obtained.

Description

CUTTING BLADE FOR BAG-MAKING DEVICE, BAG-MAKING DEVICE, METHOD OF MANUFACTURING PACKAGING BAG, AND PACKAGING BAG MANUFACTURED USING THE BAG-MAKING METHOD}

Background Art Conventionally, plastic small bags formed by heat-sealing two peripheral portions of two plastic films are known, and these plastic small bags are widely used as light packaging materials such as food packaging.

Since various materials such as liquids, liquids, powders, and the like are hermetically sealed in such plastic small bags, in addition to strength as a packaging material, gas barrier properties, and the like, easy opening is required.

As a technique for satisfying these demands, (1) a method of making a small bag in which at least one of the two plastic films contains a thermothermal film, and (2) a notch in the heat seal portion of the bag. The formation method (Japanese Patent Laid-Open No. 1989-111681) and the like are known.

However, in (1) a thermosetting film, although it is excellent in linear cutability, there exists a problem that it is not suitable for the extremely small bag which encloses seasoning etc. sealed.

Moreover, in the method of forming a notch (2), the step of forming a notch separately after bag manufacture is required, and there exists a problem that production efficiency is bad.

Summary of the Invention

An object of the present invention is to produce a packaging bag using a cutting blade, a bag manufacturing device, and a bag manufacturing device, which can be easily opened regardless of the size of a bag, and can improve production efficiency. It is providing the packaging bag manufactured by the method and its bag manufacturing method.

The cutting blade for bag manufacturing apparatus of this invention includes the cutting tooth part formed along the cutting direction of a packaging bag, and the notch formation tooth part formed in the both sides by orthogonal to the said cutting direction, and inserting the said cutting tooth part. It is characterized in that the configuration.

In this invention, the packaging bag is cut | disconnected along a cutting direction by the cutting tooth part, and the notch orthogonal to the cutting direction formed by the notch forming tooth part is formed. Since the notch forming teeth are orthogonal to the cutting direction and are present on both sides of the cutting teeth, the notches can be formed accurately without shifting the film to one side when forming the notches. Therefore, it can open easily from the site | part of a notch, and easy openability can be obtained regardless of the magnitude | size of a bag. In addition, since the notch can be formed at the same time as the cutting, it is not necessary to form the notch in a separate step, whereby the production efficiency can be improved.

In the present invention, the bag manufacturing apparatus is a concept including a packaging apparatus. Moreover, it is preferable that many notches are formed in a predetermined pitch in the direction orthogonal to a cutting direction. Further, the shapes of the cutting teeth and the notch forming teeth are not limited. As long as it can cut along a cutting direction and can form a notch in the direction orthogonal to a cutting direction, any shape may be sufficient. For example, the cutting tooth part which continues in a cutting direction and the notch forming tooth part may be provided in the direction orthogonal to a cutting direction in this cutting tooth part, or for cutting a saw blade shape along a cutting direction. The teeth may be formed and a notch forming teeth extending outward from the plate thickness of the cutting blade may be formed there. In this case, the notch is preferably linear, but may be a V-shaped notch or the like.

In the cutting blade for bag manufacturing apparatus of this invention, it is preferable that the line which connects each notch forming tooth part with each said notch forming tooth part is orthogonal to the said cutting direction.

In this case, the notch forming teeth are provided at symmetrical positions on both sides of the cutting teeth, so that the notches can be formed without shifting in the direction orthogonal to the cutting direction. Further, the cutting teeth may be formed at symmetrical positions on both sides of the cutting teeth, so that the production of the cutting blade is easy.

In the cutting blade for bag manufacturing apparatus of this invention, the said cutting tooth part consists of the saw blade-shaped many tooth piece formed along the said cutting direction, The said notch forming tooth part is formed on each said tooth piece piece. And two inclined surfaces which are inclined with respect to the cutting direction are preferably formed by a ridge formed by joining together.

In this case, since the cutting teeth are formed of a plurality of saw tooth-shaped tooth pieces, the cutting teeth are easy to penetrate into the film for packaging sealing, and the cutting becomes easy. In addition, if the cutting blade can be moved up and down at an arbitrary interval, it is also possible to form a sewing mark in addition to cutting the continuous bag according to the lowered state of the cutting teeth. In addition, since the notch forming teeth are formed by the ridges of the tooth piece pieces, they can be formed simultaneously when forming the cutting teeth, which takes less manufacturing time.

In the present invention, the angle of the blades formed by neighboring tooth piece pieces is not limited. Although it can be set as an appropriate angle (for example, 45 degrees-60 degrees) according to the material of a packaging bag, thickness dimension, etc., the degree to which a smaller one cuts is favorable.

The bag manufacturing apparatus of this invention is a pair of pinch rolls for film supply which supplies the film for packaging bags, the welding apparatus arrange | positioned in the downstream of the conveyance direction of the said film, and welds the said film, and produces a packaging bag, In the bag manufacturing apparatus provided with the cutting device which cut | disconnects the said package bag, The said cutting device is characterized by including the cutting blade for bag manufacturing apparatus of this invention mentioned above.

In the present invention, the packaging bag subjected to the heat seal processing by the welding device is cut by the cutting teeth of the cutting device, and the notches are formed by the notch forming teeth. Since the notches are provided on both sides of the cutting teeth, they can be formed accurately without slipping, whereby easy opening can be obtained regardless of the size of the bag. Moreover, since notch is formed simultaneously with cutting | disconnection, it can be set as the bag manufacturing apparatus which can aim at the improvement of productive efficiency.

In the present invention, the welding apparatus includes a heat seal method, an impulse seal method, a high frequency seal method, and an ultrasonic seal method. In addition, a bar seal, a rotary roll seal, a belt seal, etc. can be used as a heat seal method.

The method for producing a packaging bag of the present invention includes a film supplying step of supplying a film for packaging encapsulation, and a heat welding step of sealing an end edge of the film for packaging encapsulation supplied by the film supplying step to produce a packaging bag. And a cutting step of cutting the packaging bag produced by the heating welding step in units, wherein the cutting step is performed continuously using the cutting blade for the bag manufacturing apparatus of the present invention described above. Characterized by cutting the packaging bags individually.

In this invention, since the packaging bag formed continuously can be cut | disconnected with the cutting tooth part of a cutting device, and a notch can be formed by the notch formation tooth part, an individual packaging bag can be manufactured efficiently.

The packaging bag of this invention is obtained by the manufacturing method of the packaging bag of this invention mentioned above, It is characterized by the above-mentioned.

In this invention, since the packaging bag in which the precise notch was formed is manufactured, easy opening property can be acquired regardless of the magnitude | size of a bag.

The present invention provides a method for producing a packaging bag by using a cutting blade for a bag manufacturing device, a bag manufacturing device, a bag manufacturing device, and the like when manufacturing a packaging bag such as a plastic small bag used as a light packaging material such as food packaging. It relates to a packaging bag manufactured by the bag manufacturing method.

1 is an overall schematic view showing a bag manufacturing apparatus according to an embodiment of the present invention,

2 is a front view showing the cutting blade of the embodiment;

3 is a sectional view taken along the line III-III in FIG. 2, showing the main part of the cutting blade of the embodiment;

4 is a front view showing the packaging bag of the embodiment;

5 is a partial view showing a cutting blade according to a modification of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, one Example of this invention is described based on drawing.

As shown in FIG. 1, the bag manufacturing apparatus 1 of this embodiment is a pair of film supply pinch rolls 3 which supply the film 2 for packaging bags, and the pinch roll 3 for film supply. Lateral heat seal bar 4 and its receiving table 4 ′ as a welding device arranged at a downstream side in the conveying direction of the film 2 supplied from the sheet 2 at predetermined intervals, and their heat seal bars. (4) and the longitudinal heat seal bar 7 for preheating arrange | positioned downstream of the conveyance direction downstream of the film 2 of the receiving stand 4 ', the receiving stand 7', and a main heat use Longitudinal heat seal bar 8 and its receiving stand 8 ', a pair of pinch rolls for film tension arranged on the downstream side in the conveying direction of heat seal bar 8, and this pinch roll 9 The cutting blade 5 as a cutting device arrange | positioned at the conveyance direction downstream side of (), and its receiving stand 5 'are comprised.

The heat seal bar 4 and the receiving stand 4 'for the transverse seal, the longitudinal heat seal bar 8 and the receiving stand 8' for the heat, and the cutting blade 5 are made of the film 2 It is possible to move up and down in a predetermined cycle. Moreover, the cutting blade 5 is able to stop at arbitrary positions in an up-down direction.

In addition, although the preheating longitudinal heat seal bar 7 and the receiving stand 7 'are fixed by interposing the film 2 at a predetermined interval, the height direction may be adjustable.

In addition, the film 2 of a present Example is a laminated | multilayer film which laminated | stacked gas barrier films, such as nylon and a polypropylene, and a linear low density polyethylene film.

In such a bag manufacturing apparatus 1, two films 2 supplied from the pinch rolls 3 for film supply are filmed by a pair of transverse sealing heat seal bars 4 which move up and down in a predetermined cycle. Heat seal processing is performed in the conveyance direction of (2), and the bottom part (head part) of a packaging bag is formed by this.

Subsequently, heat seal processing is performed by the longitudinal heat seal bar 7 for preheating and the longitudinal heat seal bar 8 for heat transfer so as to be orthogonal to the conveyance direction of this packaging bag 11, and then a cutting blade By vertical movement of the predetermined cycle of (5), it cuts to predetermined length and the individual packaging bag 10 which has an inlet 10A in one side is formed.

In addition, inside the packaging bag 10, various materials such as spices are sealed in a separate step, and the inlet 10A is subjected to heat seal processing by a heat seal bar for transverse sealing.

The cutting blade 5 is formed of a plate member as shown in Figs. 2 and 3, and the tip end portion of the film 2 side is formed in a saw blade shape.

That is, the cutting teeth 5A formed along the cutting direction of the packaging bag 10 and the cutting teeth 5A are formed at both ends of the cutting blade 5 in the direction orthogonal to the cutting direction. It is comprised including the notch forming tooth part 5B. The cutting teeth 5A comprise a plurality of tooth pieces 5C which are arranged along the cutting direction and narrow in width in the width direction and the plate thickness direction of the cutting blade 5 toward the leading end. The notch forming teeth 5B are formed on each tooth piece 5C, and are constituted by ridges formed by combining two inclined surfaces inclined in different directions with respect to the cutting direction.

The angle α and the pitch P of the knife formed between the adjacent tooth pieces 5C are appropriately determined to correspond to the material of the film 2 or the like to achieve an optimal cut (for example, 45 ° to 60 °). °), the smaller the angle α, the easier it is to form the notch, so that the cutting becomes easier.

Here, the cutting blade 5 is able to move up and down in an arbitrary range, and when it is lowered as much as possible, the cutting teeth 5A are continuous so that the continuous bag 11 is cut and each bag ( 10) is to be formed. In addition, when the cutting teeth 5A enter a predetermined depth dimension, the cutting teeth are not completely cut, and sewing marks are formed.

As shown in FIG. 4, the packaging bag 10 has a cut line 20 and a notch 21 formed in a direction orthogonal to the cut line 20. The cutting line 20 is formed by the cutting teeth 5A, and the notch 21 is formed by the notching teeth 5B.

And the length dimension L of the notch 21 is the same as the half dimension L of the plate | board thickness of the cutting blade 5 shown in FIG. In addition, the notch 21 is accommodated in the range of the heat seal part 22. Various materials such as liquid, liquid, powder and the like are hermetically sealed in the housing 23 of the packaging bag 10.

According to this embodiment, there are effects as follows.

(1) The packaging bag 10 is cut along the cutting direction by the cutting teeth 5A, and a notch is formed by the notch forming teeth 5B. Since the notch forming teeth 5B are orthogonal to the cutting direction and exist on both sides of the cutting teeth 5A, the notches can be formed accurately without shifting to one side at the time of notch formation. Therefore, it can open easily from a notch site | part, and easy openability can be obtained regardless of the magnitude | size of a bag. In addition, since the notch can be formed at the same time as the cutting, it is not necessary to form the notch in a separate step, whereby the production efficiency can be improved.

(2) Since the notch forming teeth 5B are provided at symmetrical positions on both sides of the cutting teeth 5A, notches can be formed without shifting in the direction perpendicular to the cutting direction. Since the cutting teeth may be formed at symmetrical positions on both sides of the cutting teeth, the production of the cutting blade is easy.

(3) The cutting teeth 5A are continuous because each of the plurality of teeth pieces 5C has a shape in which the width thereof becomes narrow as the tip ends in the width direction and the plate thickness direction of the cutting blade 5. It is easy to penetrate into the packaging bag 11, and cutting becomes easy by this.

(4) Since the notch forming teeth 5B are formed by the ridge lines of the tooth piece 5C, the cutting teeth 5A can be formed at the same time as forming the cutting teeth, which takes less time to produce.

(5) Since the cutting blade 5 is movable up and down within an arbitrary range, the cutting blade 5 forms a sewing mark in addition to cutting the continuous packaging bag 20 according to the lowered state of the cutting teeth 5A. It is also possible, and the range of use becomes wider.

(6) According to the manufacturing method of the packaging bag, the packaging bag 11 formed continuously can be cut | disconnected by the cutting tooth part 5A, and a notch can be formed by the notch formation tooth part 5B. Therefore, individual packaging bags can be manufactured efficiently.

(7) Since the precise notch 21 is formed in the packaging bag 10, easy opening property can be obtained irrespective of the magnitude | size of a bag.

In addition, this invention is not limited to the said Example, If the object of this invention can be achieved, the modification shown below may be sufficient.

That is, in this embodiment, as shown in Fig. 5, the notch forming teeth 15B are formed longer by L1 than the notch forming teeth 5B of the embodiment. In this modification, the opposite end part of 5 A of cutting teeth of the notch forming tooth 15B is extended to the position of the extension line vicinity of the valley part of 5 A of cutting teeth. For this reason, since the angle of the notch forming tooth part 15B of the cutting blade 5 in the plate | board thickness direction becomes sharp, it is easy to penetrate into the continuous packaging bag 20, and cut | disconnection and formation of a notch become easier.

Moreover, the bag manufacturing apparatus 1 of the said Example is the preheating heat seal bar 7 arrange | positioned at the conveyance direction downstream of the film 2 of the heat seal bar 4 for lateral sealing, and the heat seal bar for heat ( 8) and the like are arranged, but the arrangement of the heat seal bar is not limited to this. For example, after heat-sealing the bottom part and the head part along the conveyance direction of a film by the opposing lateral seal heat seal bar, it heat-processes with a preheat heat seal bar and a heat heat seal bar for heat, and individually The packaging bag of the present invention may be formed, and then the cutting blade may cut the position away from the heat-sealed portion by the heat-sealing heat seal bar, and the cutting point may be an inlet.

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a cutting blade for a bag manufacturing device, a bag manufacturing device, a manufacturing method of a packaging bag by a bag manufacturing device, and a packaging bag manufactured by the bag manufacturing method, and is used as a light packaging material such as food packaging. It can use for manufacture of packaging bags, such as a small bag.

Claims (12)

Cutting teeth formed along the cutting direction of the packaging bag, and notch forming teeth formed on both sides of the cutting teeth perpendicular to the cutting direction and interposed with the cutting teeth. Cutting blades for bag making equipment. The method of claim 1, Each notch forming tooth is characterized in that a line connecting each notch forming tooth is orthogonal to the cutting direction. Cutting blades for bag making equipment. The method according to claim 1 or 2, The cutting teeth comprise a plurality of saw tooth shaped tooth pieces formed along the cutting direction, wherein the notch forming teeth are formed on the respective tooth pieces and inclined in different directions with respect to the cutting direction. Two inclined surfaces are formed by a ridge formed by joining together Cutting blades for bag making equipment. A pair of film supply pinch rolls for supplying a film for packaging bags, a welding device disposed on a downstream side of the conveying direction of the film, for welding the film to produce a packaging bag, and cutting the packaging bag in units In the bag manufacturing apparatus provided with the cutting device which has a cutting blade to make, The cutting blade of the cutting device is configured to include a cutting teeth formed along the cutting direction of the packaging bag, and a notch forming teeth formed on both sides perpendicular to the cutting direction and sandwiching the cutting teeth. Characterized Bag manufacturing device. The method of claim 4, wherein Each notch forming tooth is characterized in that a line connecting each notch forming tooth is orthogonal to the cutting direction. Bag manufacturing device. The method according to claim 4 or 5, The cutting teeth comprise a plurality of saw tooth shaped tooth pieces formed along the cutting direction, wherein the notch forming teeth are formed on the respective tooth pieces and inclined in different directions with respect to the cutting direction. Two inclined surfaces are formed by a ridge formed by joining together Bag manufacturing device. A film supplying step of supplying a film for packaging encapsulation, a heat welding step of sealing an end edge of the film for packaging encapsulation supplied by the film supplying step to produce a packaging encapsulation, and a production by the heat welding step In the method for producing a packaging bag comprising a cutting step of cutting the continuous packaging bag is cut into individual packaging bags using a cutting blade, The cutting blade used in the cutting step comprises a cutting teeth formed along the cutting direction of the packaging bag, and a notch forming teeth formed on both sides orthogonal to the cutting direction and sandwiching the cutting teeth. Characterized in that Method of making packaging bags. The method of claim 7, wherein Each notch forming tooth is characterized in that a line connecting each notch forming tooth is orthogonal to the cutting direction. Method of making packaging bags. The method according to claim 7 or 8, The cutting teeth comprise a plurality of saw tooth shaped tooth pieces formed along the cutting direction, wherein the notch forming teeth are formed on the respective tooth pieces and inclined in different directions with respect to the cutting direction. Two inclined surfaces are formed by a ridge formed by joining together Method of making packaging bags. A film supplying step of supplying a film for packaging encapsulation, a heat welding step of sealing an end edge of the film for packaging encapsulation supplied by the film supplying step to produce a packaging encapsulation, and a production by the heat welding step And a cutting step of cutting the continuous packaging bags into individual packaging bags by using a cutting blade, wherein the cutting blades used in the cutting step are cutting teeth formed along a cutting direction of the packaging bag, and the cutting It is obtained by the manufacturing method of the packaging bag orthogonal to a direction, and including the notch forming tooth part formed in both sides by sandwiching the said cutting tooth part. Packing bags. The method of claim 10, Each of the notch forming teeth is obtained by a method of manufacturing a packaging bag in which a line connecting the respective notch forming teeth is orthogonal to the cutting direction. Packing bags. The method of claim 10 or 11, The cutting teeth comprise a plurality of saw tooth shaped tooth pieces formed along the cutting direction, wherein the notch forming teeth are formed on the respective tooth pieces and inclined in different directions with respect to the cutting direction. It is obtained by the manufacturing method of the packaging bag comprised by the ridge formed by combining two inclined surfaces into one, characterized by the above-mentioned. Packing bags.