JPH07290609A - Apparatus for manufacturing wrapping bag - Google Patents

Abstract

PURPOSE:To provide an apparatus capable of automatically successively manufacturing plastic wrapping bags for accommodating articles with ease from a raw material roll. CONSTITUTION:While continuously winding from a raw material roll, two continuous plastic sheets arc subjected to a molding process and then to a punching process, and it includes cut rollers 6 for forming notches on one plastic sheet, folding rollers 7 for folding lines. fusing machines 13, 14 for fusing three sides of two plastic sheets 3, 8 through superimposition, and punching out rollers 15 for punching it out into a predetermined shape, each of which is disposed in turn in the winding direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for consistently manufacturing a packaging bag having a narrow gap with high precision while winding a plastic sheet from an original roll wound with a long plastic sheet, particularly a single sheet. The present invention relates to an apparatus for manufacturing a packaging bag having an insertion opening so that articles such as sheets can be stored easily.

[0002]

2. Description of the Related Art Conventionally, a hard or semi-rigid thermoplastic or thermosetting long plastic sheet having a thickness of about 0.1 to 0.5 mm is pulled out from an original roll by a cutting machine to obtain two sheets. After cutting into a rectangular sheet and forming positioning holes in both sheets, one sheet is placed between a pressed ruled die having a ruled line blade and a receiving die having a plate meshing with the ruled line blade. 3 other than the side of the side where the object is inserted
A side is bent to form a fold, and then the above-mentioned two sheet sheets are stacked in alignment with a positioning hole, and three sides are welded and punched by a punching machine to manufacture a packaging bag.

[0003]

However, in such a conventional manufacturing apparatus, since the plastic sheet pulled out from the original roll is cut into individual sheets and the steps of bending, welding, and punching are performed by separate apparatuses, Not only each of them requires manpower independently, but also the work floor area becomes large, and further, manpower and time are spent for transporting the semi-processed products between each process, which causes a cost increase.

[0004]

SUMMARY OF THE INVENTION The present invention solves the disadvantages of the conventional manufacturing apparatus, and forms, welds and punches the folds while pulling out the long upper and lower plastic sheets from the original roll. This is a manufacturing device for a packaging bag in which two long plastic sheets are continuously rolled up from a raw roll while being molded and punched out. A cutting roll for forming a cut line, a folding roll for forming a fold line, a welding machine for stacking two plastic sheets and welding three sides, and a punching roll for punching into a desired shape are sequentially arranged in the winding direction. The gist is a manufacturing apparatus for a packaging bag, which is characterized in that

In each step of the manufacturing apparatus of the present invention,
The upper and lower plastic sheets (hereinafter referred to as the upper and lower sheets) may be continuously drawn from the two original rolls, but may be intermittently drawn and each step may be performed when stopped. . In this case, there is an advantage that a device having the same structure as that of a conventional device can be used for forming a cut, forming a fold, welding, and punching. The welding machine may be ultrasonic welding, heat welding, or high frequency welding.
Ultrasonic welding is preferable from the viewpoint of preventing deformation of the upper and lower sheets.

The present invention will be described in detail below with reference to the drawings.
1 (a) and 1 (b) show an embodiment of the present invention, in which (a) is a plan view and (b) is a side view. Reference numerals 1 and 2 are upper sheet and lower sheet material rolls, respectively. The upper sheet 3 is pulled out from the upper sheet material roll 1 by a take-up roll 4, and firstly, the meandering adjusting roll 5 and the cut roll.
6. Pass the folding roll 7. It is preferable that these rolls are provided at predetermined intervals, that is, according to the pitch of the packaging bag to be completed. For example, intermittently the top sheet 3
When pulling out, the cut roll 6 is preferably provided 3 to 4 times as wide as the width of the upper sheet 3 from the upper sheet raw roll 1. If the position is closer than this, it is difficult to adjust the position, and meandering is likely to occur. The lower sheet 8 is the original sheet roll 2 for the lower sheet.
From the cut roll 1 by the take-up roll 9
After passing through 0 , the meandering adjusting roll 11 and the phase adjusting roll 12, they are aligned with the upper sheet 3 and then overlapped with this.

The stacked upper and lower sheets 3 and 8 are separated by a separating roll 16 through a side welding machine 13 , an end welding machine 14 , a punching roll 15 and a finished packaging bag is placed on a product receiver 17. Be accommodated. The upper and lower sheets 3, 8 remaining after the packaging bag has been punched are taken up by a take-up roll 18 and wound on a winder 19.

Next, the main part of the manufacturing apparatus of the present invention will be described in detail. First, the cut rolls 6 and 10 are shown in FIG.
As shown in (b), it is constituted by a bladed roll 20 and a receiving roll 21 whose rotation axes are parallel to each other. Roll with blade 2
0 is pressed by the air cylinder 22 toward the receiving roll 21 whose axial position is fixed. The peripheral surface of the bladed roll 20 is provided with a convex blade 23 which forms a sheet break when expanded, but the peripheral surface of the receiving roll 21 is flat. By providing the convex blade 23 with a different shape, it is possible to form cuts having various shapes.

When the bladed roll 20 is pressed against the receiving roll 21, assuming that the sheet thickness is tmm, the gap adjusting plate 24 is rolled by the spring 25 so that the gap between the two rolls becomes 0.1 × tmm. It is preferable to push in the axial direction. By doing this, the blade 2 of the roll with blade 20
Since the tip of 3 never contacts the receiving roll 21, the life of the blade 23 can be extended. The two rolls hardness, the bladed roll 20 H _s 75 or more, subjected to roll 21 and H _s 90 or more, subjected to the hardness of the roll 21 is better to be higher than the hardness of the bladed roll 20. Further, the bladed roll 20 and the receiving roll 21 use a gear 26 to rotate in opposite directions, and are rotated by a motor so as to synchronize with the sheet feeding speed. At this time, the blade 23 of the bladed roll 20 is cut to the sheet to 0.9 tmm, and a cut is formed in the sheet due to the action of the cutting force and the distortion generated in the periphery. If the cut is not formed on the side where the article is inserted, it will be difficult to form the next fold.

The bending roll 7 is composed of two rolls like the cut rolls 6 and 10, and one of the rolls has a groove,
The other roll is provided with a ridge corresponding to the groove, and a fold line is formed in the upper sheet 3 sandwiched between the both rolls. Here, various kinds of folds can be formed by changing the shapes of the grooves and the ridges corresponding to the grooves. Also the punching roll 15
Similar to the cut rolls 6 and 10, it is composed of a bladed roll having a blade having a shape equal to the outer shape of the packaging bag and a receiving roll having a flat peripheral surface, and punches out the completed packaging bag.

A welding machine for stacking and welding upper and lower sheets is
It is composed of a side welding machine 13 and an end welding machine 14 . The side welding machine 13 welds both sides of the packaging bag.
As shown in (a), the receiving roll 3 whose rotation axes are parallel to each other.
0 and a horn roll 31. The peripheral surface of the horn roll 31 is provided with a convex portion that forms a desired welding shape, and the horn roll 31 is pressed against the receiving roll 30 with the upper and lower sheets in between by the air cylinder 32 to rotate the horn roll 31. Side welding is performed. Since the welding is performed while pressing the convex portion of the horn roll 31 and rotating a small contact area, the output of the oscillator 33 required for the welding is instantaneous and the average energy may be small.

The end welding machine 14 welds the bottom of the packaging bag, and is composed of a horn 34 and a receiving plate 35 as shown in FIG. 3 (b). The horn 34 has the same shape as the welding shape, and the horn 34 is pressed against the flat receiving plate 35 by the air cylinder 36 with the upper and lower sheets in between to weld the bottom portion. At this time, a cylindrical cam 38 having a guide groove 37 formed on the surface is used to move the entire end welding machine at a right angle to the sheet feeding direction.

[0013]

FIG. 4 shows the process in which the upper and lower sheets are processed and deformed in each of the above steps. First, a cut 40 is formed on the upper sheet 3 by the cut roll 6 on the side of the packaging bag into which the stored article is to be inserted. Then, the folding roll 7 forms upwardly convex fold lines 41 along three sides other than the side on the article insertion side. In this case, it is desirable that the intervals between the upper sheet raw roll 1, the cut roll 6 and the folding roll 7 are made equal according to the pitch of the product packaging bag in the flow direction.

The lower sheet 8 is pulled out by the take-up roll 9 from the original sheet roll 2 for lower sheet, and the cut roll 10
Through which a sealing hole 42 is formed, the meandering adjusting roll 11,
It passes through the phase adjusting roll 12 and is superposed on the upper sheet 3. The phase adjusting roll 12 moves and detours the lower sheet 8 perpendicularly to its flow direction to match the phases of the upper and lower sheets 3 and 8, and the detour distance is preferably 1 to 2 times the length of the packaging bag. . If it is shorter than this, it is difficult to adjust the phase, and if it is longer, it causes meandering. When the packaging bag is completed, the sealing hole 42 is
The projection 43 of the cut 40 is inserted to ensure the holding of the stored item. Then the side weld lines 44 on the outside of the fold 41 by the side welder 13, end welder 14
Thus, the end welding line 45 is formed. Finally, the packaging bag is punched by the punching roll 15 and stored in the product receiver 17.

[0015]

Example: width 600 mm, length 1100 m, thickness 0.2
mm rigid PVC film (PVC manufactured by Shin-Etsu Polymer Co., Ltd.
# 540) was wound on two original rolls having an outer diameter of 650 mm, and the upper and lower sheets were intermittently pulled out from this, and each cut, bent, welded, and punched. The entire cycle required 200 seconds for a total process length of 10 m, so the time required to manufacture one packaging bag was 12 seconds.
This means that it was shortened to 1 / 15th of a second. The original roll and the take-up roll were replaced every 6 hours, but only two workers were required, and everything else could be done automatically. Labor saving was done to reduce the number of employees.

[0016]

EFFECT OF THE INVENTION Since the apparatus of the present invention can produce a stable packaging bag from the upper and lower sheet material rolls by a simple process in a continuous operation, the manufacturing time can be shortened, the number of workers can be reduced, and the work floor area can be reduced. It is possible to reduce the manufacturing cost, and it is possible to reduce the manufacturing cost, and by changing the shape of the roll, it is possible to deal with various shapes of packaging bags.

[Brief description of drawings]

FIG. 1A is a plan view and FIG. 1B is a side view of a manufacturing apparatus showing an example of the present invention.

FIG. 2 (a) of a cut roll constituting the device of the present invention
Is a front view and (b) is a partially enlarged sectional view.

FIG. 3A is a side view of a side welding machine which constitutes the device of the present invention, and FIG. 3B is a side view of an end welding machine which constitutes the device of the present invention.

FIG. 4 is an explanatory diagram of a process of processing the upper and lower sheets by the manufacturing apparatus of the present invention shown in FIG.

[Explanation of symbols]

1 ... Raw roll for upper sheet 2 ... Raw roll for lower sheet 3 ... Upper sheet 4 ... Take-up roll 5 ... Meandering adjustment roll 6 ... Cut roll 7 ... Bending roll 40 ... Break 8 ... Lower sheet 41 ... Fold 9 ... Take-up roll 42 ... Sealing hole 10 ... Cut roll 43 ... Protrusion 11 ... Meandering adjusting roll 44 ... Side welding line 12 ... Phase adjusting roll 45 ... End welding line 13 ... Side welding machine 14 ... End welding machine 15 ... Punching roll 16 ... Separation roll 17 ... Product receiver 18 ... Take-up roll 19 ... Winder 20 ... Blade roll 21 ... Receiving roll 22 ... Air cylinder 23 ... Blade 24 ... Gap adjusting plate 25 ... Spring 26 ... Gear wheel 30 ... Receiving roll 31 ... Horn roll 32 ... Air cylinder 33 ... Oscillator 34 ... Horn 35 ... Receiving plate 36 ... Air cylinder 37 ... Guide groove 38 ... Cylinder cam

Claims (1)

[Claims] 1. A manufacturing apparatus for a packaging bag, in which two long plastic sheets are continuously rolled up from a material roll while being molded and punched, and a cut roll and a fold that form a cut in one plastic sheet. Of a packaging bag, in which a bending roll for forming a sheet, a welding machine for stacking two plastic sheets and welding the three sides, and a punching roll for punching into a desired shape are sequentially arranged in the winding direction. Manufacturing equipment.