JPH0255293B2 - - Google Patents

Description

[Detailed description of the invention] This invention provides liquid cosmetics such as shampoos and rinses,
The present invention relates to a method for manufacturing a simple double-sided molded sachet package used for filling a single use amount or a small amount of other liquid materials, suppositories, or other solid materials.

Traditionally, the production of this type of double-sided molded sachet packaging involves the entire process from double-sided molding of a printed original fabric (thermoplastic sheet), primary heat-sealing of the periphery of the container, filling the contents, secondary heat-sealing, and punching. It is common to do this inline, but
In that case, skill is required when replacing and adjusting the mold, and
Conveyance pitch accuracy also depends on the balance between each process section.
The problem was that it was difficult to manage, and that product variations inevitably increased. Therefore, a method has been considered in which the processes up to double-sided molding and primary heat sealing are performed on separate lines, and then filling, secondary heat sealing, and punching (cutting) are performed on one line. However, since the containers are already three-dimensional in the first line, there is also the problem that transportation efficiency deteriorates when they are stacked and transported to the next line.

The present invention has been made in view of the above circumstances, and provides a double-sided molded sachet package that is simple in manufacturing operation, can improve product precision, and can therefore prevent product variations. The purpose is to provide a manufacturing method.

That is, in the first line, this invention
A pair of recesses corresponding to the front and back surfaces of a desired package are formed symmetrically about the center fold line from a raw fabric whose inner surface has heat-sealing properties, and a block unit containing one or more of the packages is formed. For each block, the step part is aligned with the periphery, and then it is cut into blocks including this periphery.
On the line, this unit block is folded in half along the center folding line, and the peripheral edge of the recess is first heat-sealed except for the filling opening, and then the contents are filled through the filling opening.
The present invention provides a method for manufacturing a double-sided molded small package, which is characterized in that the filling opening is subjected to secondary heat sealing, and then each package is punched out.

The present invention will be described below with reference to illustrated embodiments.

Figure 1 shows a raw fabric (for example, a single layer or a laminate of thermoplastic sheets such as polyolefin sheets) having heat-sealable inner surfaces aligned on the first line, and then centered around the center fold line 1. A pair of depressions 2a and 2b corresponding to the front and back surfaces of the desired package are formed symmetrically, and the depressions are formed in each block unit containing one or more packages (in this case, 4 packages). One example is shown in which a stepped portion 3 is formed on the peripheral edge and then cut into blocks including this peripheral edge. In the process of forming this unit block, it is preferable to form incisions 4 at both ends of the folding line 1, including the step portion 3 in the vicinity, in order to facilitate folding in a subsequent process.

The recesses 2a and 2b have filling openings 5a and 2b, respectively, for introducing a nozzle for filling the contents in a subsequent process.
5b is formed to open to the stepped portion 3. Note that the stepped portion 3 provided at the peripheral edge is intended to supplement the mechanical strength of the raw fabric used in this type of packaging, since it is made of a relatively thin and easily bendable material. . Therefore, this stepped portion has a waveform shape 3a as shown in FIG.
It may be of.

Next, place this formed block unit on another line, using the center folding part 1 as a folding line.
Fold it in half as shown in the picture, then center fold part 1
Temporary stickers are applied at regular intervals as shown in Fig. 3, or in a linear manner along the vicinity of the center folded part 1 as shown in Fig. 4 (6 in Fig. 3 or 7 in Fig. 4).
Thereafter, as shown in FIG. 5, the peripheral edges 9 of the recesses 2a and 2b are heat-sealed, except for the introduction portion of the nozzle 8 for filling the contents. Next, this unit block is conveyed to the filling section in the same line, and as shown in FIG. A quantitative amount will be introduced.

After this filling is completed, the filled unit block is transported to the secondary sealing section in the same line, and the filling openings 5a and 5b are heat-sealed (the part indicated by 11 in the figure) as shown by the broken line in FIG. The filling is sealed within the package. After this secondary sealing is completed, this unit block is conveyed to a punching section and punched out into individual packaging units, completing the main manufacturing process.

FIG. 7 schematically shows the process of processing unit blocks manufactured on the first line on the second line. That is, first, in FIG. 7a, the material obtained in the first line and supplied for each formed unit block as shown in FIG.
This is a step in which temporary fixing as shown in FIG. 3 or 4 is performed at the same time as necessary. FIG. 7b shows the peripheral edges of the recesses 2a and 2b constituting the content storage portions at the content filling nozzle 8 introduction portions (or filling opening portions 5a and 5).
After heat sealing except for b), the contents are filled through the nozzle 8 as shown in Fig. 5, and Fig. 7c shows the openings of the filling ports 5a and 5b after filling As shown in Figure 6, this is the process of heat-sealing the package to completely seal the contents, and Figure 7d is the process of inserting a sewing machine blade if necessary and then punching out each package. be.

As detailed above, according to the present invention, the front and back surfaces of the package are formed on a heat-sealable original fabric in the first production line, and then the package is cut into blocks without being shaped into a container. , this was done on a separate line for center folding, primary sealing, filling, sealing, and finally punching.
Manufacturing operations such as the operation of the conveyance pitch are simplified, and it is possible to improve the accuracy of the product (matching of the front and back sides of the package and the matching accuracy of the printed surface), and the problem of product variations can be solved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the front and back sides of the pouch package molded on the original fabric, Fig. 2 is a sectional view showing a modification of the molded product shown in Fig. 1, and Figs. 3 and 4 are the views shown in Fig. 1. FIG. 5 is a perspective view showing the state in which the molded body shown in FIG. The side view of the package and FIGS. 7a to 7d are schematic diagrams sequentially showing the steps of the second line. In the figure, 1... center folding line, 2a, 2b...
Recess, 3...Step, 4...Notch, 5a, 5
b... Filling port, 6, 7... Temporary seal portion, 8... Filling nozzle, 9... Peripheral portion, 10... Separate guide.

Claims (1)

[Claims] 1. In the first line, a pair of indentations are formed symmetrically about the center folding line in a raw fabric whose inner surface has heat-sealability, and correspond to the front and back surfaces of the desired package, respectively. , each block including one or more of the packages is molded by aligning the stepped portion with the peripheral edge thereof, and then cut into block units including this peripheral edge, and in a second line,
This unit block is folded in half along the center folding line, and the peripheral edge of the recess is first heat-sealed except for the filling opening, and then the contents are filled through the filling opening. A method for producing a double-sided molded sachet package, which comprises performing secondary heat sealing and then punching out each package. 2. The method according to claim 1, wherein in the second folding step in the second line, the vicinity of the central folding portion is temporarily sealed at the same time as the folding in two. 3. The method according to claim 1, characterized in that the first line includes the step of forming a notch in the peripheral stepped portion on an extension of the central folded portion.