JPS6124243B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of matching patterns, etc. in filling packaging, and more specifically, a method of matching patterns, patterns, etc. printed on a cover film and a container formed on a container film within a certain error range. This invention relates to a method for matching patterns, etc., that can be matched within a computer.

Generally, in a mold-fill-packaging machine, containers are formed on a resin container film at predetermined intervals, and after filling the containers with contents such as food, the containers are sealed with a cover film. In this case, it is easier to supply the cover if the cover film is in the form of a long strip like the container film, rather than supplying a cover or lid for each container, so the container can be sealed tightly using the strip-shaped cover film. After sealing, the container is punched out from the original film and separated.

By the way, as shown in FIG. 1, when it is necessary to provide designs, symbols, etc. (hereinafter referred to as "designs") N for indicating the contents on the cover c of the container r, they are placed on the cover film in advance at equal intervals. The pattern N is printed and the container r is matched with the pattern, but it is extremely difficult to match them accurately without any deviation, so the forming, filling and packaging machine is operated under completely automatic control. I had a problem that prevented me from driving. In other words, when printing the design N on a cover film such as aluminum foil, printing misalignment is inevitable and the spacing between the designs on the cover film does not necessarily match, making it difficult to match the cover film and the container. There are many.

Moreover, since the error in the spacing between the patterns on the cover film gradually accumulates as the filling and packaging process progresses, there is a problem that the pattern N and the container r are significantly misaligned, making it impossible to manufacture a good product.

Conventionally, as a method to solve such problems,
As shown in German Patent Application No. 2,653,196, a method is provided in which the cover foil is stretched to match the design.

However, the method described in this West German publication involves disposing a plurality of rods with rectangular cross sections between a pair of tension rollers, and passing the cover film in contact with them. (In order to eliminate slippage between the tension roller and the film, vacuum suction holes are formed on the surface of one of the tension rollers and the film is adsorbed.) Therefore, the cover film made of thin aluminum foil can be stretched. If the film is difficult to elongate and is easy to cut, not only will it not be possible to increase the elongation, but the cover film will likely break.

The present invention was made in view of the problems of the conventional enlarging type pattern matching method, and its purpose is to form a slit in a cover film and stretch the cover film at that part. The purpose of this invention is to make it possible to increase the size of the cover film and to eliminate the need to cut the cover film.

The present invention provides a method for aligning containers formed at predetermined intervals on a container film with patterns etc. provided at predetermined intervals on a cover film covering the containers, in which the spacing between the designs is set to be larger than the spacing between the containers. A detecting device is installed in the middle of the transport path of the cover film to detect the design, etc., or a mark associated with the design, etc., so that when the cover film is stopped intermittently, the design, etc. is detected by the mark. and when the detecting device cannot detect the pattern, etc. or the mark, a slit extending in the horizontal direction is formed in the cover film, and the cover film is stretched by a predetermined length at the slit. It is configured.

FIG. 2 schematically shows the overall structure of a forming, filling and packaging machine that implements the method of matching patterns, etc. according to the present invention. In the same figure, F is the container film, F' is the cover film, and 2 is the cover film.
Roller-type feeding devices 3a, 3b, and 3c of known structure for feeding F' are guide rollers for the cover film F', and 4 is a feeding device 2 and a guide roller 4a.
A tension roller of a known structure provided between the upper limit position and the lower limit position, respectively.
A, 4b can be detected. 5 consists of a fluid pressure cylinder 50 and a rubber brake shoe 52 attached to the tip of a piston rod 51 of the fluid pressure cylinder, and a guide roller 3b.
6 is a detection device, and 7 is a slitting device.

Furthermore, 8 is a heater for heating the container film F;
9 is a container forming device that forms containers r at predetermined intervals on a container film F; 10 is a container forming device that forms containers r in container r;
11 is a sealing device for sealing the container film F and cover film F'; 12 is a punching device for punching out the package h; 13 is a sealing device for sealing the container film F and the cover film F';
is the piston rod 131 of the fluid pressure cylinder 130
This is a film feeding device which clamps the container film F etc. by a clamper 132 attached to the tip of the container and feeds it intermittently by a predetermined feeding stroke (same as the interval between the containers r), and all of them have a known structure.
Therefore, a detailed explanation of their structure and operation will be omitted.

As shown in FIG. 3, the detection device 6 optically detects a pattern or design (hereinafter simply referred to as a design) N printed on the cover film F' or a mark M printed in relation to the design. This is a photoelectric switch with a known structure that can detect

In FIGS. 4 and 5, the slitting device 7
has a plurality of long grooves 70 facing the cover film F'.
A long fixed die 70 with 0 parallel to each other, a pair of guide rods 71 protruding from both ends of the fixed die 70 toward the cover film, a holder 72 slidably supported by the guide rod 71, and a spacer on the holder 72. A plurality of slitters 73 are fixed in parallel and separated from each other via connectors 74 and have serrated blades 730 at their tips, and a holder 7 is connected via a connector 75 to the slitters 73 .
By operating the cylinder 76, the holder 72 and the slitter 73 are moved to the fixed die 70, and by pushing the slitter blade 730 into the long groove 700, the fixed die is moved. A large number of slits S as shown in FIG. 6A are formed in the cover film F' which is passed between the slit and the slit.

Next, the operation of this forming, filling and packaging machine will be described.

The container film F is intermittently transported by the film feeding device 13 at a constant interval W, and during this time the container film F is moved to a position A.
The containers r are heated by the heater 8 at position B, and containers r are formed at equal intervals W by the container forming device 9 at position C, and the contents a are filled into the containers r by the filling device 10 at position C. They will be transferred sequentially.

On the other hand, a pattern N and a mark M related to the pattern N are printed in advance on the cover film F' at an interval W' slightly shorter than the interval W. The mark M is always printed at a constant interval ω from the adjacent pattern N at the same time as that pattern N. Therefore, even if β occurs in the symbol interval W' and the mark interval W', the interval ω between the symbol and the mark related to the symbol does not deviate.

This cover film F′ is attached to the tension roller 4
The guide rollers 3a to 3c are moved by the feeding operation of the film feeding device while being applied with a predetermined reverse tension by
It is supplied to the sealing device 11 through the. Then, at the start of forming, filling and packaging, the pattern M of the cover film and the container r are initially aligned in the sealing device 11 and sealed in this state, and then the punching device 12
Then, similar operations are performed to sequentially form, fill, and package the container.

Then, when the sum of the difference between the symbol interval W' and the container interval W and the symbol interval deviation β reaches a certain limit value L, this is detected by the detection device 6.

That is, since the normal pattern interval W' of the cover film F' is made slightly smaller than the container interval W by δ as described above, the cover film F' is moved along with the container film F by the film feeding device every one feeding stroke. When the film is intermittently transferred by the length W, and if there is no deviation at all in the pattern spacing, the stop position of the mark M shifts by δ each time and advances upstream, and this deviation is accumulated until the total number is reached by n times of film feeding. The advance amount H is H=nδ. Furthermore, if there are m times when a deviation of β (or -β) occurs in the symbol interval during n feeds, the total advance amount H' at that time is H' = nδ - mβ (or H' = nδ+mβ)
becomes. When H or H' exceeds the limit value L (H≧L or H'≧L), the detection device 6 detects at position G that the stop position of mark M has shifted beyond the limit. To detect.

When the detection device detects the signal, the signal is sent to the control device 60.
and the control device 60 controls the hydraulic cylinder 50 of the brake device 5 and the slit device 7.
The hydraulic cylinder 76 is operated to press down the cover film and provide resistance to the movement of the cover film, and at the same time, the sixth fluid pressure cylinder 76 is moved to the cover film F' at position I.
A slit S as shown in Figure A is formed.

Since the brake device 5 remains in operation during the next intermittent feeding operation of the films F and F', braking force is applied while the cover film moves, and the cover film F' It is stretched at the slit as shown in FIG. 6B. Therefore, the misalignment of the pattern of the cover film with respect to the container is eliminated.

The amount of elongation of the film by one intermittent operation is determined by the braking force applied to the cover film, the size and amount of the slits, the tensile strength of the cover film, etc. Therefore, when the type of cover film is determined, the braking force, number and size of slits required to achieve the desired amount of elongation may be experimentally determined in advance.

As is clear from the above explanation, according to the present invention, it is possible to stretch the cover film relatively large without cutting it, and the position of the pattern on the cover film can always be kept within a certain range with respect to the container, and automatically. can be positioned.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a package made by form-fill packaging, Fig. 2 is a schematic configuration diagram of a form-fill packaging machine that implements the method of matching designs, etc. according to the present invention, and Fig. 3 is a portion of a cover film. 4 is a perspective view of the slitting device, FIG. 5 is a sectional view of the slitting device, FIG. 6A is a diagram showing the slit before being stretched, and FIG. 6B is a diagram showing the slit after being stretched. It is. 1... Forming, filling and packaging machine, 5... Brake device, 6...
Detection device, 7... Slit device, 9... Container forming device, 10... Filling device, 11... Sealing device, F... Container film, F'... Cover film, M... Mark, N... Design, r... Container, S... Slit .

Claims (1)

[Claims] 1. In a method of matching containers formed at predetermined intervals on a container film and designs, etc. provided at regular intervals on a cover film that covers the containers, the intervals between the designs, etc. are made smaller in advance than the intervals between the containers. , a detection device for detecting the design, etc. or a mark associated with the design, etc. is provided in the middle of the transport path of the cover film, so that the design, etc. or the mark is detected when the cover film is intermittently stopped;
In a filling packaging characterized in that when the detecting device fails to detect the pattern, etc. or the mark, a slit extending in the horizontal direction is formed in the cover film, and the cover film is stretched to a predetermined length at the slit portion. How to match designs etc.