JPH0329714A - Automatic filling-and-packing apparatus - Google Patents

Abstract

PURPOSE:To achieve a complete seal even if an item contains oil by a method wherein two or more sealing lines are formed by ultrasonic wave sealing across the whole width of a tube before and behind a cutting line. CONSTITUTION:A piston unit 10A is intermittently operated to fill a regular volume of an item into a tube 2' through a nozzle 7. Next, the tube filled with the item is sent downward as it is pressed by a compressing roller 23 to form flat parts 2'B in which the item does not exist, and a sealing unit 24 works on the flat parts 2'B to complete sealing. At this time, the flat parts 2'B are tightly held by a ultrasonic wave phone 24 and an anvil 24B and sealed by ultrasonic waves. Sealing lines are formed on the sealing part by four protruding lines on the anvil 24B, and ultrasonic waves having a frequency of 30kHz-50kHz are applied.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is used in the technical field of automatic filling packaging,
In particular, the present invention relates to an automatic filling and packaging apparatus that continuously feeds a synthetic resin tube, injects contents into it, divides it into sections of a certain size, seals them, and cuts them here to obtain a single package.

[Conventional technology]

The basic structure of this type of conventional equipment mainly consists of a forming plate, a welding device, an injection device, a narrowing device, a sealing device, and a cutting device.

That is, a band-shaped film drawn from, for example, a raw material is formed into a cylinder shape using a forming plate while providing a longitudinal overlapping portion, and then the overlapping portion is welded using a welding device to form a tube.

On the other hand, a nozzle is inserted into the tube from the opening on the forming plate side, and the contents are injected into the tube through the nozzle to form a continuous cylindrical object.

The cylindrical material into which the contents have been injected into the tube is then intermittently compressed by a constriction device at predetermined time intervals to form a flat portion from which the contents are locally removed.

Next, in the above-mentioned flat part, the films are in contact with each other, and a sealing device is used to seal the film over a certain length in the longitudinal direction of the tube or at multiple locations, and a cutting device is used to cut the film in this sealed area to form a single package. I'm getting a body.

[Problems to be Solved by the Invention] However, in the conventional device described above, since the tube has the polymerized portion as described above, when forming the flat portion, the thickness in the width direction of the tube is Problems occur because the parts are different from each other. That is, there are four films in the polymerized area and two films in the other areas. This also applies to the case where the tube has a gusseted form with folded folds on both sides; particularly in this case, there are three locations where the thickness differs from the other sections, including the overlapping section. Even if such a tube is compressed to form a flat part where no contents are present, the contents will return to the area where the two films are attached, albeit in a small amount, due to capillary action and remain as they are. If the tube is not completely sealed, the seal strength will decrease, the appearance of the sealed part will deteriorate, and furthermore, the contents will remain at the cut end of the tube when it is cut, resulting in spoilage at the cut end if the contents are food. Ultrasonic sealing is one method of sealing as described above. This ultrasonic seal is 20KH
There is an advantage of sealing while eliminating contents remaining in the gap between the flat parts or entering by capillary action under a frequency of about z. However, if you try to uniformly seal a wide area in front and behind the cut part, including the cut part, for the purpose of perfecting the seal, the contents to be removed will simply move within the area, and the above purpose will not be achieved. I can't command. This problem is particularly noticeable when the contents contain oil.

The present invention solves the problems of the above-mentioned conventional devices in this type of device, and uses an ultrasonic seal to achieve automatic filling that can completely seal even if the contents contain oil. The purpose is to provide a packaging device.

[Means to solve the problem]

According to the present invention, the above object is to inject the contents into the tube while continuously feeding it,
This is an automatic filling and packaging device that separates and seals the film into predetermined dimensions and then cuts the film.The device uses a forming plate that forms a tube-shaped film made of Hewei resin into a cylindrical shape with longitudinal overlapping parts, and welds the overlapping parts together. an injection device that injects the contents into the tube with a nozzle inserted from the opening on the forming plate side of the tube; and an injection device that injects the contents into the tube intermittently at predetermined intervals. a narrow pressure device that applies narrow pressure to form a flat part where no contents are locally present; a sealing device that seals the tube in the width direction at the flat part; and a starting end of the seal sealed by the sealing device. and a cutting device that cuts the tube between the end portion and the end portion, and the sealing device includes a plurality of linear seals extending over the entire width of the tube at positions before and after the cutting position of the tube by the cutting device. The ultrasonic sealing device has a frequency of 30 KHz to 50 KHz.
It is achieved by the fact that it is KHz.

[Effect]

In the present invention, a plurality of linear ultrasonic seals are applied to the flat portion formed by the narrow pressure device before and after the cutting position. Since each linear seal has a relatively narrow line width, a complete seal can be achieved while fully utilizing the content exclusion feature of the ultrasonic seal. Moreover, the frequency is 3
Since it is sealed with high energy of 0 KHz to 50 K}{z, the above-mentioned exclusion effect is also large. Incidentally, the upper limit of the above-mentioned frequency is about 50 KHz, which is enough to obtain the effect, and higher frequencies are not required since energy loss increases if the upper limit is about 50 KHz.

After sealing, the product is cut using a cutting device to obtain individual products.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a raw material, and a band-shaped film 2 made of synthetic resin is wound into a roll. The film 2 reaches a forming plate 5 via a guide roller 3.4, where it is formed into a cylindrical shape with an overlapping portion 2A.

A welding device 6 is disposed below the forming plate 5. The welding device 6 includes a guide tube 6^ that guides the cylindrical film, and a vertical sealing hot plate 6B consisting of a pair of block-shaped bodies disposed above the side of the guide tube 6^.
(see FIG. t(B)) and a certain pressure roller 6C (see FIG. 1(C)) located below the roller. In this welding device 6, the overlapping portion 2^ of the cylindrical film is heated and melted by passing between the pair of vertical sealing hot platens 6B, and is then compressed by the pressure roller 6C. It is then sent as tube 2'A.

A nozzle 7 serving as an injection device for injecting the contents is inserted into the upper opening of the forming plate 5, passes through the guide tube 6A of the welding device, and its tip reaches a position below the guide tube 6A.

The upper end of the nozzle 7 is connected to a pump 9, such as a gear pump, for discharging the contents in the hopper 8, and the nozzle 7 is further connected at its intermediate portion to an accumulator 10 with a piston device 10A. . The pump 9 rotates continuously and the piston device 10A of the accumulator 10
operates in the same cycle as the sealing device described below.

U-shaped guides 1l extending in the vertical direction are attached to both sides of the lower end 7A of the nozzle 7, which is the part that projects downward from the guide tube 6A of the welding device. The guide 11
is a U that opens radially outward as shown in Figure 1(D).
The guide 11 is shaped like a letter and guides the tube 2'' so that its cross section is approximately rectangular, and a folding plate 12 is inserted into the U-shaped groove of the guide 11 to form folds on the side of the tube 2''. However, it has a so-called gusset shape. The guide 11 and the folding plate l2 are provided at two locations, upper and lower, and a pair of feed rollers 13 are provided at an intermediate position as shown in FIG. 1(E).
are provided, and the tube 2' is continuously fed downward while sandwiching the folded portion between the folding plates 12. Therefore, the film 2 before forming the tube 2' is also continuously fed.

A tube 2 is provided on the surface of the guide 11 and the folding plate 12.
In order to avoid undesirable wrinkles when forming folds on the tube, it is desirable to coat the tube with a low-friction material, such as a fluorine-based resin, so that the tube can be fed smoothly.

A pair of auxiliary rollers 14 are provided at the lower end 7^ of the nozzle 7, which assist the feed roller 13 and bend the overlapping portion 2'A of the tube 2' to overlap the surface of the tube 2'. A small roller (not shown) is provided on the side of the lower end 7^ of the nozzle 7, and together with the auxiliary roller 14, the tube 2' is fed while sandwiching the film of the tube 2'.

A narrow pressure roller 23 is arranged below the nozzle 7. The narrow pressure roller 23 is separated from a small roller 23A that directly presses the tube 2' and a backup roller 23B that applies back pressure and rotation to the small roller 23A. The narrow pressure roller 23 is the same as described above, and direct narrow pressure is performed by a small roller, so that a step-like shoulder can be formed on the product, so that the product can be filled with a large amount of contents and has a uniform appearance. Become. Furthermore, the drawback of narrowing pressure on unnecessary parts, which is the case with large diameter rollers, is also eliminated.

An ultrasonic sealing device 24 and a cutting blade 25 as a cutting device are disposed below the narrow pressure roller 23.

The cutting blade 25 is integrally assembled with the sealing device 24, and is attached to a reciprocating plate 20 which intermittently descends at the same speed as the film speed during the sealing operation cycle, and quickly returns to its original position and ascends. On the reciprocating disk 20, an ultrasonic horn 24A and an anvil 24B, which are close to each other during sealing, are arranged facing each other. The anvil 24B is shaped like a four-piece protrusion whose tip extends perpendicular to the plane of the paper, and a cutting blade 25 is provided at an intermediate position, that is, a position where there are two protrusions in the front and back in the film feeding direction. is provided. The cutting blade 25 is connected to an ultrasonic horn 24A and an anvil 24.
B approaches the film, presses the film, welds it, and then protrudes to the cutting position.

The vibration frequency of the ultrasonic horn 24A is 30 KHz~
50 Kl{z, and is appropriately determined within this range.

The lower limit of this frequency (30 Kl{z) is a value necessary to ensure a sufficient seal when implementing the present invention, but the upper limit (50 KHz) is particularly important because even at frequencies higher than this, energy loss only increases. This value is sufficient for this frequency.

Next, the filling and packaging process in this embodiment having the above structure will be explained step by step with reference to FIG.

The film 2 pulled out from the original fabric 1 is shaped into a cylinder with an overlapping portion 2A by a forming plate 5, and then formed into a tube 2' by a welding device 6. This tube formation has been described above and will not be discussed in detail.

The contents to be filled are contained in the hopper 8 and are sent to the nozzle 7 by a bomb 9. The contents are stored in the accumulator 10 through the nozzle 7, and are intermittently ejected by the piston device 10A to inject a fixed amount into the tube 2' from the lower end 7A of the nozzle 7. At this time, the sealing device 24 is in the sealing position and the lower end of the tube 2° is closed. In addition, the narrow pressure roller 23
is in the reverse position and inactive.

Since the above-mentioned contents are filled while the tube is continuously fed, the reciprocating plate 20 also descends accordingly, and therefore the sealing device 24 also descends while maintaining the above-mentioned sealed state. When the tube descends to a predetermined position, that is, when a predetermined amount of the contents is injected at once, the piston device 10A moves the piston of the accumulator 10 backward and transfers the contents continuously supplied by the pump 9 to the accumulator 1.
Pull it within 0.

Next, the tube into which the contents have been injected is conveyed downward while being compressed by the narrow pressure roller 23 to form a flat portion 2'B in which no contents exist. Under such conditions, the sealing device 124 operates on the flat portion 2''B, and sealing is completed.

At this time, the flat portion 2'B is compressed by the ultrasonic horn 24A and the anvil 24B, receives ultrasonic waves, and is sealed here. This seal part is formed into a linear shape by four protrusions on the anvil 24B, and the ultrasonic frequency is 30 KHz~
Since the frequency of 50 KHz is sufficient, the contents remaining in the flat portion 2'B can be easily removed from the narrow linear seal portion to ensure a reliable seal. Immediately after the above seal, a cutting blade 25 protrudes and cuts the tube between the two upper and lower seal lines to obtain individual products as shown in FIG. In this way, the safety of the seal is further improved because the cutting position is firmly sealed by the two upper and lower seal lines.

In the present invention, the number of seal lines on one side of the cutting position is not limited to two, but may be three or more. Furthermore, the form of the seal line does not necessarily have to be straight;
For example, it may have a zigzag or wave shape.

[Effects of the Invention] As described above, the present invention seals with a plurality of seal lines on one side of the cutting position, and the seal is heated at 30KHz to 50K.
Since we decided to use Hz ultrasonic waves, even if the contents contain oil, the contents can be removed from the seal line and the seal can be reliably sealed, and the safety of the seal can be improved by using multiple seal lines. As a result, it is possible to completely prevent the contents of the product from spoiling.

[Brief explanation of drawings]

Fig. 1 shows an apparatus according to an embodiment of the present invention, Fig. 1 (^) is a partially cutaway front view of the entire apparatus, and Figs. 1 (B) to (E)
2 shows a sectional view of the product obtained by the apparatus shown in FIG. 1, and FIG. FIG. 6・・・・・・・・・Welding device

Claims (1)

[Claims] Injecting the contents into the tube while continuously feeding it,
This is an automatic filling and packaging device that separates and seals the film into certain dimensions and then cuts the film.The device uses a forming plate that forms a cylindrical shape from a synthetic resin band-like film with vertical overlapping parts, and welds the overlapping parts together. a welding device that forms the tube; an injection device that injects the contents into the tube with a nozzle inserted from the opening on the forming plate side of the tube; and an injector that injects the contents into the tube intermittently at predetermined intervals. a narrow pressure device that applies narrow pressure to form a flat portion where no contents are locally present; a seal device that seals the tube in the width direction at the flat portion; and a starting end of the seal sealed by the seal device; a cutting device that cuts the tube between the terminal end and the tube, and the sealing device applies a plurality of linear seals across the entire width of the tube at positions before and after the cutting position of the tube by the cutting device. The ultrasonic sealing device has a frequency of 30KHz to 50KH.
An automatic filling and packaging device characterized by: