JP2739640B2 - Continuous production method of hermetically sealed package formed of laminate film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-melting film made of polyethylene or the like and a non-low-melting film laminated with a non-low-melting film such as an aluminum foil or the like laminated on the upper surface of the film. Sealing is performed by laminating the laminated end of the sheet in the longitudinal direction along the length direction and the outer edge as a lattice-shaped uneven sealing portion, and sequentially welding in a horizontal direction for each sealed package. The present invention relates to a method for continuously manufacturing a package.

[0002]

2. Description of the Related Art Conventionally, as a kind of continuous sealing of a package of this type, for example, a structure disclosed in Japanese Utility Model Publication No. Sho 53-32869 is known. In this known sealed package, both the vertical seal and the horizontal seal are tiered seals, and these seals are both formed continuously by a pair of seal rolls.

[0003]

However, in the above-mentioned prior art, the sealing method is such that a film sheet folded in two by a pair of seal rolls is sandwiched from both sides and melted by heat, and then welded to each other for sealing. It is. The seal roll used is formed with a jagged jagged surface in order to form a twill-shaped seal, and these chevrons are closely matched in dimensional accuracy by a pair of seal rolls, and this is a predetermined pressing force. If it is not pressed, it is not possible to obtain a sealed package composed of an accurate and reliable seal portion. If they do not match, the film will be perforated, and it will be easy to wear out quickly, and if there is too much dimensional accuracy, it will be necessary to increase the pressing force, resulting in melting In some cases, the resin is impregnated into an aluminum foil or the like and the portion is thinned to make the portion extremely fragile, and a pinhole is easily formed, which may cause leakage and cracks.

However, in the case where the above-mentioned sealed package is a child bag, in particular, the mountain-shaped knurls (irregularities) of the twill-shaped seal portion become fine, and this is continuously sealed at a considerable speed. It is extremely difficult to determine whether or not the unevenness of the seal portion is accurate while the work is being performed, and it was only possible to find out after confirming after the sealed package was completed. Until this discovery, it was inevitable that a certain number of defective products would be manufactured.

Further, since there is no means for confirming the proper sealing pressure during the production operation of the hermetically sealed package of the apparatus, the drive of the apparatus is temporarily stopped for inspection after producing a certain quantity even in the initial stage of production. After that, the seal pressure of both seal rolls had to be adjusted. Therefore, while this adjustment is performed, the driving of the apparatus must be stopped, and there is a problem that the production efficiency is significantly reduced.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems by folding a laminated film sheet into two and feeding the laminated film sheet into a thin film in the longitudinal direction while feeding the laminated film sheet. Forming a continuous lattice-shaped uneven seal portion with a predetermined width and forming a solid seal at a predetermined interval in a horizontal direction to produce a sealed package, wherein a continuous raised ridge is formed adjacent to the lattice-shaped vertical seal. A flat seal portion is formed between them, and the shape and form of the vertically continuous raised ridges formed on the sealed package are determined during the manufacture of the sealed package, and an appropriate sealing pressure is applied to the operation of the apparatus. It is intended to provide a method for continuously manufacturing a hermetically sealed package formed of a laminated film, wherein the method is adjusted inside. Since the raised ridge is continuous in the vertical direction, it is noted that this shape can be observed for a longer time than in the horizontal direction, and a change in the shape appears as a change in the sealing pressure of the vertical seal roll. Therefore, by discriminating the shape and form of the raised ridges, it is possible to easily and surely find a strong or weak change in the sealing pressure of the vertical seal roll visually during the packaging operation, and thereby, during the packaging operation. This is also intended to quickly and properly adjust the sealing pressure of the vertical seal roll.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the apparatus shown in FIGS. In this apparatus, in a state where the laminated film sheet is folded in two, the vertical seal rolls 5, 5, the horizontal seal rolls 7, 7, and the roll cutters 12, 12 are sequentially actuated via the guide 4 to form a sealed package. The body b is manufactured.

Reference numeral 1 denotes a film sheet which is supplied by being folded in two. The film sheet is formed by laminating a non-low-melting film 3 such as nylon or aluminum foil on the upper surface of a low-melting film 2 such as polyethylene. This is folded in two with the non-low-temperature melting film 3 outside. Reference numeral 4 denotes a guide for continuously forming the film sheet 1 into a cylindrical shape, and is attached to a required position of a machine body (not shown). Reference numerals 5 and 5 denote a pair of longitudinal seals provided with a heat seal portion 5a for forming a tubular bag body a by forming a longitudinally overlapping edge portion of the film sheet 1 formed into a tubular shape by the guide 4 into a longitudinal seal portion 6. Roll. As shown in FIG. 2, the heat seal portion 5a has a seal portion forming surface 14 having grid-like unevenness for forming a grid-like uneven seal portion 6a, and two flat surfaces having substantially the same diameter as the seal portion forming surface 14. Surfaces 15, 15 and a groove 16 for observing the seal pressure are provided between the two flat portions. Reference numerals 7 and 7 denote a pair of horizontal seal rolls which are mounted below the vertical seal rolls 5 and 5 and are attached to the machine body. The horizontal seal rolls cross at right angles to the vertical seal portion 6 of the film sheet 1 and extend in the horizontal direction. A heat seal portion 7a is provided. Reference numeral 8 denotes a horizontal seal formed by the horizontal heat seal 7a. Reference numeral 9 denotes a means for filling and supplying the contents. In the case of this embodiment, a nozzle is shown, but the present invention is not limited to this.

Reference numerals 10 and 10 denote gears for rotationally driving the vertical seal rolls 5 and 5. Reference numerals 11 and 11 denote gears for rotationally driving the horizontal seal rolls 7 and 7. These gears 10 and 11 are seals. Each of the roll shafts 10a and 11a is attached to an end portion thereof, and is configured to be synchronously driven to rotate at a rotation speed of 1: 1. Reference numerals 12 and 12 denote roll cutters for cutting the horizontal seal portion 8 in a horizontal direction from the center thereof. b is a sealed package completed as shown in FIG.

The folded film sheet 1 is continuously supplied and sandwiched from both sides by a pair of vertical seal rolls 5 and 5 and a pair of horizontal seal rolls 7 and 7 to form a vertical seal portion 6 and a horizontal seal portion 8. And cut and separated by the roll cutters 12 to form a sealed package b. The vertical seal portion 6 is formed with a lattice-shaped uneven seal portion 6a and a raised ridge 6c sandwiched between two solid seal portions 6b.

An actual sealing operation, which is a main part of the present invention, will be described using the above-mentioned vertical seal rolls 5, 5 and horizontal seal rolls 7, 7. The feeding of the film sheet 1 is carried out by using a conventional two-fold feeding device as it is. The vertical seal rolls 5 and 5 form a vertical seal portion 6 continuously, and the horizontal seal rolls 7 and 7 form a horizontal seal portion 8. Are formed intermittently. The vertical seal portion 6 is provided with a lattice-shaped uneven seal portion 6 having a predetermined width as described above along the outer edge.
a and two flat solid seals on the inside thereof and a raised ridge formed continuously between the two solid seals,
The film sheet 1 is heated from both sides by the longitudinal seal rolls 5 and 5, and the low-temperature fusible film 2 located inside is melted and pressed and adhered. The film 2 is sequentially fused and the surplus portion is pushed out, so that the groove 16
To form the raised ridges 6c. Whether or not the protruding ridge 6c is formed in the correct shape and form can also be visually determined. Therefore, by reading the ridge, it is possible to easily determine whether the sealing pressure of the seal roll is high or low. You can discover change. In other words, the shape and form of the raised ridges 6c are not necessarily formed in the vertical seal portions 6 that are continuously formed in a certain shape and form (projection dimension, width dimension) in advance. It is determined based on the seal roll pressure, heating temperature, and film material at the time of setting, and whether the ridge 6c is formed in the set shape and form while the ridge 6c is continuously formed in the vertical direction. By observing, abnormal seal pressure can be found.

For example, in the case of visual inspection, since a predetermined shape and form are continuously continued,
The change in form is easily noticeable. If the shape and form are collapsed, the apparatus is finely adjusted without stopping the driving of the apparatus during the packaging operation so that the set shape and form are obtained. In the illustrated embodiment, the raised ridges 6c are formed on both surfaces. However, the same applies to the case where the raised ridges 6c are formed on one surface. However, it is also possible to judge the shape and form of the raised ridge.

[0013]

As described above, according to the present invention, a laminated film sheet is supplied in a state of being folded in two, and the overlapping end of the film sheet is formed with a thin outer edge along the length direction. In a lattice-shaped uneven seal part of a predetermined width,
In a packaging device provided with a seal roll for vertically sealing a flat solid seal portion continuously with a raised ridge on its inner surface, and a seal roll for horizontally sealing each sealed package,
On the seal roll for performing the vertical sealing, a raised ridge that allows the strength and weakness of the roll pressure of the vertical seal roll to be observed is continuously formed in the longitudinal direction by being sandwiched between a lattice-shaped uneven sealing portion forming surface having a predetermined width and two flat surfaces. With the configuration in which the groove portion is provided for forming, the abnormality of the sealing pressure of the vertical seal roll can be recognized from the change in the shape and form of the raised ridge formed on the vertical seal portion of the film sheet. As a result, even when the packaging device is in operation, an excellent effect of being able to flexibly adjust to a strong or weak change of the sealing pressure so that the raised ridge is formed in an appropriate shape and form can be obtained. Things. In addition, the formation of the raised ridges means that the excess molten portion of the low-temperature fusible film is absorbed by the ridges and breaks through a non-low-temperature fusible film such as an aluminum foil to damage or break a pinhole. This can be prevented from occurring, and is also useful for forming a stable and strong seal.

The present invention is supported by a unique idea that a subtle change in the sealing pressure is expressed by the raised ridges to determine them by providing the raised ridges that are continuous in the longitudinal direction. Although it is a simple means, this makes it possible to adjust the sealing pressure without stopping the operation of the device, which has an excellent and unexpected effect, and at the same time, has the effect of reinforcing the vertical seal. Have

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of the present invention.

FIG. 2 is a plan view of a vertical seal roll used in the present invention.

FIG. 3 is a front view of a sealed package manufactured according to the present invention.

FIG. 4 is an enlarged sectional view taken along the line IV-IV in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Film sheet 2 Low-temperature fusible film 3 Non-low-temperature fusible film 4 Guide 5 Vertical seal roll 5a Heat seal part 6 Vertical seal part 6a Lattice-shaped uneven seal part 6b Solid seal part 6c Raised ridge 7 Horizontal seal roll 7a Horizontal heat seal Part 8 Horizontal seal part 9 Supply means for filling and supplying the contents 10 Gear 11 Gear 12 Roll cutter 13 Filling space 14 Grid-shaped uneven seal part forming surface 15 Solid seal part forming surface 16 Groove a Cylindrical bag b Sealed package

Claims (1)

(57) [Claims] 1. A laminated film sheet is folded in two, and while being supplied, the overlapped end portion of the film sheet is formed into a lattice-shaped concave-convex seal portion which is continuous in a predetermined width and is thin in a length direction, and is formed in a lateral direction. In the method for manufacturing a sealed package by forming solid seals at predetermined intervals, a flat seal portion is formed adjacent to the lattice-shaped vertical seal with a continuous raised ridge formed therebetween, and formed into a sealed package. A sealed film formed of a laminated film, characterized in that the shape and form of the vertically continuous raised ridges are determined during manufacture of the sealed package, and an appropriate sealing pressure is adjusted during operation of the device. Continuous production of the body.