JPS58102747A - Manufacture of germless self-erecting bag - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention describes a method for manufacturing a self-supporting bag that has a shape of ML by folding a sheet of film or paper into a bag shape and heat-welding the periphery. The present invention relates to a manufacturing method for obtaining the following in parallel and continuously in the longitudinal direction.

In general, self-standing bags are shown in the Utility Model Publication No. 55-21968 bulletin.
It is like 1 book, and there are 111 drawings to wL4 drawing materials (1)
The two outer fold lines (B) centered on the inner fold line (2) (
4) has a so-called gusset folded part (6) that is folded to form a W-shaped cross section, and both ends (la) and (lb) of the folded packaging material (1) are the body wall part. (6) and the bottom (6), and is folded inward (ml).
There are U-shaped and reverse ;-shaped notches (
γ) (8) and glue the trunk walls together at this part.
According to this bag, the notch (γ) (8) smell (6) (6) allows the comrades to be directly attached to each other.

Since a single-sided heat-sealable packaging material can be used and the four-layered bottom portion can be heat-sealed in two layers, a self-supporting bag with high rail stability can be obtained.

The packaging material used has an outer surface that emits corona.
Treated polyethylene, polypropylene, polyester, polyamide or metal foil, etc.

If a packaging material lacking heat-sealability is used, a material having heat-sealability on the inner surface, such as polyethylene, polypropylene, ethylene-vinyl acetate co-constituted material, ionomer resin, etc., is used.

To make a single bag like the one described above, cut it into the bag's unfolded shape as shown in Figure 1.

Fold it into a bag shape and fold it so that the bottom becomes a gusset fold, as shown in Figures 8 and 3 (periphery (1!L) (1m) excluding the part that will become the opening of the bag) (8) (4)
A device for continuous KM manufacturing of this is found in Japanese Patent Publication No. 453-30066.
(I've already made a suggestion.)

The present invention proposes a method for simultaneously forming two sets of bags from one wide strip in parallel and continuously in the longitudinal direction using the manufacturing method as found in Japanese Patent Publication No. 63-30066. Furthermore, we propose a method of making the formed bags sterile, sealing them tightly, and leaving a continuous bag that can be opened and filled with an ax when filling the contents. It is something.

In other words, the length of the continuous material is +3 □
First, it is sterilized in a sterilizing tank with hydrogen peroxide or chlorine water, etc., then dried, and then folded in half toward the center into an envelope shape. Slots in the direction perpendicular to the eyes are punched at the chain side edge positions at a constant pitch, and then the two adjacent slots are punched so that the folds on both side edges have a W-shaped cross section.
) Hot weld 71 to the strip along both side edge creases between
At the same time, heat welding is applied to the strip in the transverse direction of 7 with a width wider than the width of each slot in the strip feeding direction, and heat welding is applied to the strip in the 7 transverse direction. Heat weld it vertically on both sides.

Therefore, two sets of bags are arranged in parallel, and the bag material is continuously formed in the length direction of the tubes. This is done in a cage in a sterile chamber.

According to the present invention, the strip drawn out from the original fabric winding section≠1
The tube is first processed through a sterilization process and then placed in a sterile chamber until the bag material is sealed, and then it is rolled up, so that a free-standing self-supporting bag is produced, and the length of the strip is Since two sets of bags are exposed at the same time in parallel, a large quantity of free-standing bags can be manufactured.

Moreover, when winding up one bag of material, it is folded in half into an envelope shape, and the center is sealed vertically with cages on both sides of the center edge, so the center part becomes two layers, and even if the center part is wrapped, there are three layers. Since it is a layered bag, there is less difference in thickness compared to the four-layered part in the gusset parts on both sides, and the bag material is not wound up in a large drum shape (one roll is easy to roll. There is a percentage mark.

In the following, the embodiment shown in the drawings will be described in detail.

First, the bag material obtained by the manufacturing method of the present invention is formed continuously in parallel in the longitudinal direction.

This is one wide strip (ml is folded in half towards the center like an envelope), and the edge of the folded in half is H (to).
The comrades should be woven together as shown in Figure 6 or lined up as shown in Figure 1. After that, cut out the notches (7) (8).
Punch out slots corresponding to the IK in a direction perpendicular to the folds on both sides of the T-shaped bottom by folding in half. Fold inward 41 [2) so that the folds on both sides of the IK have a W-shaped cross section. Fold the two outer parts in the center by (a) (4) and heat-weld the peripheral parts of the bag. Heat weld both sides of the center edge (to) d (9) (95L
It has a square bottom.

Next, the outline of the above manufacturing method will be explained based on FIG. 148.

The bag material 1a) is drawn out from the original fabric roll (B), and the bag material that has been made into bags through the killing process and the bag making process is wound up on a take-up roll (B). The sterilization process and the bag making process are carried out in a sterile chamber.

The inside of the WK bacteria chamber (B) is filled with sterile air that is slightly more pressurized than the outside air.

Air is blown out from the entrance and exit of the strip, and air is mixed in from the outside.

All bag materials are processed in a sterile chamber, so
Even if the sealed bag material is conveyed to the outside air, no contamination occurs inside the bag.The strip ml pulled out from the original roll (b) is first sterilized with a sterilizer.

In other words, in %) (b) (b) (to) (2) - 1 is the guide roll.

At the guide roll (b) part, the strip is immersed in a sterilizing tank f# of hydrogen peroxide or chlorine water, etc. At the guide roll (e) part, heated air is blown from the drying nozzle to completely sterilize the strip. be transformed.

The partition of the sterilizing tank (2) serves as a seal against the outside air.

The sterilized strip (9) is bifolded into an envelope shape via a strip bifolding machine (2), which folding is completed after the strip passes between a pair of rollers (2).

A notching device) is provided after the roller).
Throwers F corresponding to the lower notches (7) and (8) are punched out along the folds on both sides of the 1% strip folded in half (the strips are intermittently fed by the drive rollers described below) Yes, the punching operation is performed only when the strip is stopped tIc.

After the strip (aJ) subjected to the punching action in this manner passes through a guide roller, it is sent to a bottom wall sheet binding device.

At this point, both edges of the two-folded strip are gusset-folded.

After passing through the folding rollers (riE, Sagi sheet folding device), the strip passes between the folding rollers ■, and then passes through the bottom edge welding device 9I.
At υ, the (lc) part is cooled to prevent heat welding.

Ru.

I feel sick without clothes.

After passing through the side edge welding device), apply the center seal (9) (9f) to both sides of the center edge using the vertical welding device.
rJfjf After passing through the intermittent drive roller, it is wound up on the roller (b).

The bag material wound around the roller (B) is cut in the transverse direction shown in Figure 5- when filling the contents, and then the center seal (
・) A vertical cut (5!9) is made inside the container, the seal is opened, and the contents are filled from - until the filling is finished.
By the way, this unsealed part is sealed again.

Note that the punching is done according to the pattern, but in the case of striker Tsubu, which can be heat-sealed on both sides, punching is not necessary.

Next, each process equipment will be explained in detail.

The punching device (2) consists of a punching die (27a) and punches (2i'/b) that press the bottom surface of the strip.
), the punch (!Iwit) is the piston yg in the working cylinder, which is supplied with pressure fluid via the solenoid valve ee-IE-
n) connected to the piston) lowering (from the punching die C2) a) to the punch hole of the punch (2) b)
lowers and cuts the lower notches (7) (8) along the folds of the strip.
) Punch out the slot +- corresponding to (・This punch is S)
This is done only when the +3 knob is stopped, but the % solenoid valve - is)
It operates in synchronization with the intermittent feed of 13 knobs.

Next, the bottom wall &-) folding device (2) is grooved by a pair of upper and lower chevron-shaped guide plates (411) and a pair of left and right folding members (rollers) □□□, as shown in FIG.

The winter mountain-shaped guide board (Foundation) has corners 15 (43) on both sides, and when both edges of the strike I3-'/ pass through, there is a crease (441) on both edges folded in half due to this angle. formed n
- On the other hand - folding parts (rolling) are upper and lower chevron guide plates (foundation)
A cam edge (451 is the upper and lower chevron-shaped guide plates (411 (
The cam action acts on the fold -l- of both side edges which is being expanded somewhat in the vertical direction by the cam, and the fold FJ is gradually pushed between the chevron-shaped guide plates (41) and (41) and reversed.

Then, when the strip ends at the end of the cam edge, the crease is completely folded inward at about 11L. In addition, a new double fold (461) is also formed on the strip and tube, and the slot is also reversed by the reversal of the fold (2).

The portion of the strip formed between the folds (rolls) then becomes the bottom wall sheet of the bag.

Also, the length of the slot is equal to the distance between the folds.
The upper heat can be moved up and down by the guiding action of the column! 1
When the upper heating plate lowers when the strip stops and presses the part of the strip along the fold line WJK between it and the lower heating plate, there is no thermal welding of that part.

At the next stop of the ST+3 tube, the heat welded part is cooled by the cooling device.

This device consists of a lower cooling board (■) and an upper cooling board (5
The heat welded part is cooled by the pressure between the two parts.

The heating plate 4 and the cooling plate 6υ are moved up and down in synchronization with the feeding of the strip by a drive device (not shown).

Next, the heat welding device in the transverse direction of the strip is the lower heating plate.
The upper heating platen moves against the strip and pinches the strip, thereby achieving thermal welding in the transverse direction.

(53a) At the next stop of the IJv pump, the thermally welded part of the strip will be transferred to the lower cooling plate (53a) and the upper cooling plate (53a).
4a) is cooled between V 0 and @-, which indicates the upper heat i1 of the longitudinal welding device and adds the longitudinal seal (9) (95) together with the lower heating plate (not shown).

The explanation of other parts is the same as that of Japanese Patent Publication No. 53-30066.

Example tIKL, but according to the present invention, since the %@W// is aseptically sealed and the bag material is sealed, not only can a sterile self-supporting bag be obtained, but also the center of one bag material Compared to the four layers of the gassezu part on both sides, it has three or two layers.
The difference in thickness is small, so when rolled up, it prevents a large drum shape.
It has the feature of being easy to wind up.

[Brief explanation of the drawing]

Figure 231 is the unfolded packaging material of the self-supporting bag (2), Figure @2 is a front view of the self-supporting bag shown above, and Figure i@3 is a slope view of the self-supporting bag shown above. Figure 4 shows the self-supporting bag shown above partially cut away. Figure @δ is a plan view of a self-supporting bag obtained by the proposed method. FIG. 6 is a sectional view of the same as above. FIG. 1 is a sectional view different from FIG. 6. FIG. 8 shows the apparatus Q used in the method of the present invention] Schematic diagram 1 1g! Figure 9 is a detailed slope view of the same as above. Figures 3g1O and 11 are explanatory diagrams of the state of processing performed on the material strip. FIG. 12 is a partial perspective view of FIG. 9. (B)・・・・・・・−Material roll (B)・・・・・・・Take-up roll ■・・・・・・・−SM chamber ■・・・・・Sterilization In the tank）・・・・−・−Bi-folding bottom type device (B)・−・−・−Punching device）・・・・・・−・−Bottom wall sheet folding device Φυ・・・
・−・・・Bottom edge welding Wl child）・−・・・Side edge welding device (2)・・・・・・・・・Vertical direction welding device patent applicant
Agent for Dai Nippon Printing Co., Ltd. Tsutomu Watanabe, 2F5
Figure 6 Figure 7

Claims (2)

[Claims] (1) Continuous material) IJ wrap is fed in its length direction - 1 First, it is sterilized in a sterilization tank, dried, and then folded in two toward the center into an envelope shape. Punch out slots in the direction of direct firing in the folds of both side edges with a cage at a constant pitch, and then fold in so that the folds on both sides have a W-shaped cross section. Heat welding is applied to the strip 191 along both edges and folds between the two slots, and the strip is positioned at each slot with a width wider than the width of each slot in the strip feeding direction. 1. Next, heat weld vertically on both sides of the center bifold edge portion, 1. Thus, two sets of bags are wound in parallel from both sides of the strip, and at least the above-mentioned A bag making method for self-supporting bags with S-shaped features, in which everything from the sterilization process to the sealing of the bag material is carried out in a sterile chamber. (2) A bag-making method for a sterile self-standing bag according to claim 1, in which the edge portions of IJ tubes are lapped together; (8) a bag folded in half toward the center; A method for making a sterile self-standing bag according to claim II1, wherein the edges of the strip folded in half are formed so as not to be wrapped but to be perforated.