JPH0255294B2 - - 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 is also difficult to control due to the need for balance between processable parts and the use of thin, soft materials as the raw material, resulting in a problem of increased product variation. 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.

This invention has been made in view of the above circumstances, and provides a double-sided molded sachet packaging body that is simple in terms of manufacturing operations, can improve product conveyance accuracy, 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. At the same time as or after this molding process, a molded part consisting of a projection or cut for conveyance positioning is formed at a predetermined position inside the peripheral edge, and the peripheral edge is In the second line, the unit block is folded in half along the center folding line, and then the filling opening is removed and a portion of the concave periphery is heat-sealed. The process includes a step of filling the contents through this filling port, then performing secondary heat sealing on this filling port, and then punching out each package unit. The present invention provides a method for manufacturing a double-sided molded sachet package, characterized in that the stop positioning of the unit block in each step is performed via the molding section consisting of the transport positioning projection or cut.

Hereinafter, the present invention will be explained with reference to embodiments of the drawings.

Figure 1 shows a raw fabric (for example, a single layer or a laminate of thermoplastic sheets such as polyolefin sheets) having heat-sealing properties on the inner surface, which is pitch-aligned along 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 the 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.

In FIG. 1, 12 is a T-shaped cut for forming a molded part for conveyance positioning, and as shown in FIG. Although they are formed almost symmetrically, the positions of the T-shaped heads are slightly shifted from each other. This is to prevent the transport position from shifting due to bending to form the molded part 13a for transport positioning as shown in FIG.

The molded part for conveyance positioning is not limited to the above-mentioned one; for example, a window part 14 is formed on one side as shown in FIG. 5, a slit 14' is formed on the other side, and a notch part 13b is formed as shown in FIG. Molded with a hot plate,
Alternatively, as shown in FIG. 7, a slightly larger notch 15 is provided on one side, and a slightly smaller notch 15' is provided on the other side, and a molded part 1 as shown in FIG.
It is possible to select an arbitrary shape such as a shape having a shape of 3c.

In addition, as shown in FIG. 9, a pair of recesses are formed at the same time as the recesses 2a and 2b, so that they protrude outward during the subsequent two-folding process.
This may also be used as a positioning molded part.

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 Figure 1, and then fold one part of the center folded part at regular intervals as shown in Figure 11.
Or, as shown in FIG. 12, a temporary seal (6 or 12 in FIG.
7) in the figure, and a molded part 13a for transport positioning is formed as shown in FIG. 13, and the molded part is transported to the correct position of the primary seal and filling part via this.

When performing linear temporary sealing along the vicinity of the central fold-in portion 1, it is preferable to perform the sealing so as to include at least the outer edge of the portion at the time of molding. If the molded part is a T-shaped notch as shown in FIG. 3, the sealing plate for temporary sealing is not flat, but a sealing plate with one side concave and the other side convex. Further, if the molded portion has a window-like cut as shown in FIG. 5 or 6, a flat seal plate may be used.

Next, the peripheral edges 9 of the recesses 2a and 2b are heat-sealed, except for the introduction portion of the content filling nozzle 8. Next, this unit block is conveyed to the filling section on the same line, and as shown in FIG.
A predetermined amount of the contents is introduced into the opening formed by a and 5b.

After this filling is completed, the positioning notch 13a
to the secondary sealing section in the same line,
As shown by broken lines in FIG. 14, filling ports 5a and 5b
is heat-sealed (the part indicated by 11 in the figure) to completely seal the filling inside the package. After the secondary sealing is completed, this unit block is similarly conveyed to the punching section via the positioning molding section 13a and punched out into individual packages, completing the main manufacturing process.

FIG. 15 schematically shows a process in which locks produced in the first line are processed in the second line. That is, first, Figure 15a is the first
The material obtained in the line 1 and supplied for each formed unit block as shown in FIG. 1, for example, is center-folded through the center folding line 1, the front and back surfaces are brought together, and then the molded part 13a for conveyance positioning is formed. At the same time, temporary fixing as shown in FIG. 11 or FIG. 12 is performed at the same time as necessary. 1st
Figure 5b shows recesses 2a and 2 constituting the content storage portion.
After heat-sealing the periphery of b except for the content filling nozzle 8 introduction part (or filling opening parts 5a, 5b), as shown in FIG. 13, this is a step of filling the content through this nozzle 8. , FIG. 15c shows that after filling the contents, the openings of the filling ports 5a and 5b are opened to the first position.
As shown in Fig. 4, this is a step of completely sealing the contents by heat sealing, and Fig. 15d is a step of punching out each package after inserting the sewing machine blade if necessary.

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 is then folded to the center on another line, primary sealed, filled, sealed, and finally punched out.A molded part consisting of a protrusion or notch for transport positioning is formed near the periphery of the unit block, and the molded part is formed through this. Since the conveyance between each process on the second line is carried out using the same method, the operation of the conveyance pitch, etc. is simplified, and the accuracy of the product (the accuracy of the alignment of the front and back sides of the package and the alignment accuracy of the printed surface) is significantly improved. This makes it possible to solve the problem of product variation.

[Brief explanation of drawings]

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, Figs. FIG. 7 is a plan view showing a modification of the notch for forming the transport positioning notch, and FIGS. 4, 6, and 8 are the same as those in FIGS. 3, 5, and 7, respectively. FIGS. 9 and 10 are perspective views illustrating a method of forming a positioning protrusion, and FIGS. 11 and 12 are center-folding of the molded body shown in A perspective view showing a state in which
FIG. 13 is a perspective view showing the state in which the contents are filled into the package, and FIG. 14 is a side view of the package illustrating a heat sealing method for sealing after filling the contents.
FIGS. 15a to 15d 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 sealing part, 8... Filling nozzle, 9... Periphery, 10... Separate guide, 12, 12'... Notch, 13a, 1
3b, 13c... Molding section for conveyance positioning.

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 unit containing one or more of the packages is molded with a stepped portion aligned with its peripheral edge, and at the same time or after this molding process, a transport positioning protrusion is placed at a predetermined position inside the peripheral edge. or a step of forming a molded part consisting of notches and cutting it into blocks including the peripheral edge part; In a second line, the unit block is folded in half along the center folding part, and then the filling opening part is cut in half. The step of first heat-sealing the periphery of the recess, filling the contents through the filling port, secondly heat-sealing the filling port, and punching out each package, A method for producing a pouch package, characterized in that the stop positioning of the unit block in each step after the primary heat sealing in the second line is performed via the molded part consisting of the transport positioning protrusion or notch. 2. The method according to claim 1, wherein the positioning molding part is molded at the same time as or after the second line folding process and is used for transport positioning. 3. The method according to claim 1, wherein the cut in the molded part for conveyance positioning is formed with the cut position slightly shifted between the front side and the back side of the package.