JP2022110263A - Device for manufacturing film-like product with formed corner portions and manufacturing method for manufacturing film-like product with formed corners - Google Patents

Abstract

To reduce manufacturing costs by improving a yield of film-like materials in manufacturing film-like products with formed corner portions.SOLUTION: A manufacturing device 1 is provided with: a pair of nip rollers 13; a transverse cutter 14 for cutting a film material F along a lateral direction D2; a punching device 3 for punching a punching objective portions P into a shape of corner portions C; and a longitudinally-moving device 15 for moving forward a region R adjacent to a front side of a region R that is conveyed to the punching device 3 by the nip rollers 13, so as to separate the regions adjacent to each other in a vertical direction D1. Further, it is preferable for the manufacturing device 1 to comprise a longitudinal cutter 12, and for the punching device 3 to comprise: a punch 31 and a die 41 for punching the punching objective portions P to form the corner portions C; curved blocks 32, 42 which are curved so as to separate the regions R adjacent to each other in the lateral direction D2, for punching of the punching objective portions P.SELECTED DRAWING: Figure 1

Description

The present invention relates to an apparatus for manufacturing a film-like material with molded corners and a method for manufacturing a film-like material with molded corners.

The bag making machine feeds and conveys a continuous film material made up of superimposed films by rollers, and following heat sealing, moves the film material in the advancing direction (longitudinal direction) and the film material width direction (horizontal direction). A bag made of the film material is manufactured by performing processing such as cutting the film material and punching corners to remove sharp corners of the film.
Such a bag making machine is configured with a corner forming device (for example, Patent Document 1). According to the corner cutting device of Patent Document 1, a curved guide surface for guiding the material piece is formed on a cutter to which the material piece having slits formed along the longitudinal direction is supplied. In Patent Document 1, since the slit in the vertical direction spreads in the width direction by the amount that the material piece bends along the guide surface of the fixed cutter and the guide surface of the movable cutter, the gap between the vertical edges of the adjacent films There is a gap in In the gap, the portion where the vertical edge and the horizontal edge intersect is cut into the shape of the corner portion.

JP-A-8-119229

Due to the meandering of the film material fed by the rollers and the positional accuracy of the film material stopped at the punch position of the forming apparatus, the film material may deviate from the designed position in the corner forming apparatus. In order to cope with such a shift of the film material, as shown in FIGS. 9B and 10A, the film material F is provided with a waste allowance F1 in the vertical direction D1 and a waste allowance F2 in the horizontal direction D2. ing.

As shown in FIG. 9A, when the film material F is displaced in the vertical direction D1 (advancing direction) with respect to the punch 90 of the forming apparatus, the film material F is displaced in the horizontal direction D2 with respect to the punch 90 (not shown). may deviate. Assuming that there are no discard margins F1 and F2 as shown in FIGS. A sharp burr 99 is generated at the edge.

The cutting of the film material F having the discard margins F1 and F2 into individual film-like objects and the shaping of the corner portions are performed, for example, as shown in FIG. 10(b).
While the film material F is fed by the feed roller 9R, the film material F is cut parallel to the horizontal direction D2 by transverse cutting (horizontal two-line cutting) by two side-by-side horizontal cutters (not shown) corresponding to the waste margin F1. put in Further, the longitudinal cutter 91 cuts in the longitudinal direction D1. When the scraps corresponding to the waste margin F2 generated thereby are wound up by a mechanism (not shown), a gap g corresponding to the waste margin F2 is formed between the film regions adjacent to each other in the lateral direction D2.
Thereafter, when the film material F is punched into the shape of the corner portion using the die 9, the film material F is cut into individual products B and the corners of the products B are cut off. At this time, the positional deviation of the film material F with respect to the plane center of the punch 90 is allowed within a range in which the star-shaped tip portion 90A of the punch 90 (FIG. 9(b)) can be accommodated within the discard margins F1 and F2. On the other hand, the film material F is wasted corresponding to the waste allowance F2 due to the vertical cutting and the scrap f' due to the punching, so the yield of the film material F is poor.

According to the above-mentioned Patent Document 1, by bending the material piece of the film by the curved guide surface of the cutter, the material piece is punched inside the longitudinal slit that spreads in the horizontal direction. Therefore, although the material piece can be displaced in the lateral direction within the range of the widened width of the slit, if it is displaced in the vertical direction, burrs will occur. Therefore, if the waste margin is set in the vertical direction, the waste of the film material increases due to the increase in the waste margin.

In view of the above, an object of the present invention is to improve the yield of the film material in the production of a film material with molded corners, thereby reducing the production cost.

The present invention is an apparatus for manufacturing a film-like material having corners formed from a film material, comprising: a conveying section for vertically conveying a film material, which is a set of film regions corresponding to the film-like material; A transverse section that cuts the material along the horizontal direction that intersects the longitudinal direction, a punching section that punches out a corner portion at a punched portion where the vertical and horizontal sides of the film region intersect, and a transport a longitudinal separation part that separates the adjacent film areas in the longitudinal direction by moving forward the film area adjacent to the front side of the film area conveyed to the punching part by the part. .

The manufacturing apparatus of the present invention further includes a longitudinal cutting section for cutting the film material along the longitudinal direction, and the punching section includes a punch and a die for punching the punched portion to form the corner portion, and a punch and a die for punching the punched portion. It is preferable to have a lateral separation portion that separates laterally adjacent film regions by curving the film material.

In the manufacturing apparatus of the present invention, the transverse section has only one horizontal blade for cutting the film material, and the vertical cutting section has one vertical blade for cutting the film material between the film regions in the horizontal direction. It is preferable to have only

In the manufacturing apparatus of the present invention, the lateral separation section includes a pair of curved walls that sandwich the film material from both sides around the punching location, the pair of curved walls being a movable curved wall that interlocks with the punch; It preferably consists of a fixed curved wall whose position is fixed.

In the manufacturing apparatus of the present invention, preferably, the movable curved wall is formed in a convex shape toward the fixed curved wall, and the fixed curved wall is formed in a concave shape following the shape of the movable curved wall.

In the manufacturing apparatus of the present invention, it is preferable that a forming jig having a movable curved wall is provided around the punch separately from the punch, and pressurized toward the fixed curved wall when punching a punching portion.

In the manufacturing apparatus of the present invention, it is preferable that the vertical cutting section, the conveying section, the transverse section, and the punching section are arranged in this order from the rear side to the front side in the vertical direction.

In the manufacturing apparatus of the present invention, it is preferable that the longitudinal separation section includes a belt that attracts the film material to the surface by internal suction.

It is preferable that the manufacturing apparatus of the present invention further includes a pressing portion that presses the film material from both sides when punching the punching points between the punching points that are adjacent in the lateral direction.

The manufacturing apparatus of the present invention is a bag-making machine that manufactures a bag using a film material composed of films that are continuously laminated, and heats a predetermined sealing region of the film material to seal the overlapped films. The vertical cutting part and the transverse part for cutting the film material along the longitudinal direction cut the sealing part made of the film welded by the welding device, and the punching part cuts the sealing part Punching is preferred.

Further, the present invention is a method for manufacturing a film-like article with formed corners from a film material, wherein the film material is formed along a horizontal direction crossing the vertical direction in which the film material is conveyed. and a punching step of punching a corner portion at a punched portion where the vertical side and the horizontal side of the film region intersect.
The above method further includes a vertical cutting step of longitudinally cutting the film material, which is a set of film regions corresponding to the film-like object and is conveyed in the longitudinal direction, and in the punching step, the front side of the film region By moving the film regions adjacent to each other forward, the longitudinally adjacent film regions are separated, and by bending the film material when punching the punching locations, the laterally adjacent film regions are separated. It is preferable to punch out the punched portion while keeping the state of being flat.

According to the present invention, by punching the film material in the longitudinal direction as well as the transverse direction, the film material is punched in a state in which the areas located at the punching points of the film material are spaced apart in both the longitudinal direction and the transverse direction. It is possible to reduce the molding defect rate and improve the yield of the film material without the need to set a waste margin.

1A is a plan view schematically showing a film-like material manufacturing apparatus according to an embodiment of the present invention; FIG. (b) is a diagram showing vertical and horizontal cutting lines and punched portions (black) of the film material used in the present embodiment. It is a schematic diagram showing the film-like material manufacturing apparatus according to the present embodiment from the side. [Fig. 1] is an elevational view showing the film manufacturing apparatus from the direction of arrow III in Fig. 1(a). (a) is a plan view showing a punch and a movable curved wall from below. (b) is a plan view showing the die and fixed curved wall from above; (a) is a schematic diagram showing a film material as viewed from line Va-Va in FIG. 1(a). (b) is a schematic diagram showing a film material and a punch as viewed from the line Vb-Vb shown in FIG. 1(a). (a) is a schematic diagram showing a film material from the direction of the arrow VIa in FIG. 1(a). (b) is a schematic diagram showing the shape of a corner portion of a film-like material. FIG. 10 is a diagram showing an example in which margins are provided on both lateral sides of the film material; (a) to (c) are schematic diagrams showing modifications of the present invention. (a) and (b) are diagrams for explaining a case where a discard allowance is set for the film material. (c) is a diagram showing a burr generated at a corner portion when no waste allowance is set. (a) is a diagram showing a disposal margin set for a film material. (b) is a plan view schematically showing a film material manufacturing apparatus to which a film material to which a discard allowance is provided is supplied.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
A film material manufacturing apparatus 1 shown in FIGS. 1(a) and 2 manufactures a film material 2 from a film material F having corner portions C formed thereon.
A film material F is a set of regions R corresponding to individual film-like materials 2 .
At least two regions R are set in the lateral direction D2 in the film material F of this embodiment.
The film material 2 is various products obtained by cutting the film material F into rectangles, strips, and the like.

The film material 2 of this embodiment is a bag manufactured using a film material F made of laminated films, and the manufacturing apparatus 1 of this embodiment is a bag making machine that manufactures such a bag. In order to weld the superimposed films, the film material F is constructed using a thermoplastic resin material.
A bag having an appropriate size is manufactured using a film material formed from an appropriate material and having an appropriate thickness according to the use of the bag. The use of the bag is not limited. For example, it may be a bag for packaging food or a bag for packaging liquid used for medical treatment (infusion solution, etc.).

Of course, the film-like material 2 may be a product made of one sheet of film material F. As will be described later, the material and thickness of the film material F do not matter as long as the film material F can be curved when punched.

The manufacturing apparatus 1 sequentially performs vertical cutting (St2), horizontal cutting (St3), and punching (St4) on a film material F fed from a film raw material (not shown) to form a film. get item 2.
When it is necessary to fuse the superimposed films together by heating, such as in the case of obtaining a bag as the film material 2, the film material F is subjected to welding (St1).

In this specification, the conveying direction in which the film material F is conveyed is defined as "longitudinal direction" (D1). In addition, the width direction that intersects the lengthwise direction of the film material F is defined as the "horizontal direction" (D2).
Further, the downstream side in the transport direction (longitudinal direction) of the film material F is defined as "front", and the upstream side in the transport direction (longitudinal direction) of the film material F is defined as "rear".

The manufacturing apparatus 1 (FIGS. 1A and 2) includes a welding device 11 (FIG. 2), a vertical cutter 12 and a horizontal cutter 14 for cutting the film material F, and a film material F sandwiched from both sides. A nip roller 13 for conveying in the longitudinal direction D1, a punching device 3 for punching a punching position P of the film material F, and a longitudinal movement for moving the film material F forward in the longitudinal direction D1 ahead of the punching device 3. It has a device 15 and a control device (not shown) that controls the operation of each part.
The vertical cutter 12, the nip roller 13, the horizontal cutter 14, and the punching device 3 are arranged in this order from the upstream side (rear side) to the downstream side (front side) in the conveying direction (longitudinal direction D1) by the nip rollers 13. It is
The film material F is intermittently conveyed by the nip rollers 13 at a pitch corresponding to the length of the region R in the longitudinal direction D1.

[Welding device]
The welding device 11 (FIG. 2) applies heat to the grid-shaped sealing area set in the film material F to weld the superimposed films together (welding step St1). FIG. 1(b) shows a seal portion S made of a film welded by the welding device 11. As shown in FIG. The seal portion S consists of a vertical seal portion S1 parallel to the vertical direction D1 and a horizontal seal portion S2 parallel to the horizontal direction D2.

The welding device 11 (FIG. 2) has a vertical welding portion 111 corresponding to the sealing portion S1 parallel to the vertical direction D1, and a horizontal welding portion 112 corresponding to the sealing portion S2 parallel to the horizontal direction D2. there is The space between the films in the range surrounded by the seal portion S is the storage space of the bag (indicated by the dashed line in FIG. 1(b)).

In the case of this embodiment, since the seal portion S is formed along the entire circumference of the four peripheral edges of the rectangular region R, a bag is manufactured in which the four sides are sealed by welding. An opening is provided for taking out the contents from the bag when the contents are put into the accommodation space of the bag.
It is not limited to this embodiment, and the opening of the bag can be provided by welding the films together while leaving a part of the peripheral portion of the region R.

A film material F with a stable seal portion S is supplied to the longitudinal cutter 12 by the nip rollers 13 as the temperature is lowered after welding. The vertical cutter 12 and the horizontal cutter 14 cut the seal portion S of the film material F, and the punching device 3 punches the seal portion S as well.

[Nip roller]
The nip rollers 13 (FIGS. 1(a) and 2) are a pair of rollers 131 and 132 for sandwiching the film material F from both sides in the vertical direction and feeding it forward, and the rollers 131 and 132 are shown to rotate in directions opposite to each other. It is configured including a motor that does not
In this embodiment, at least, the film-like material 2 obtained through vertical cutting (St2), horizontal cutting (St3), and punching (St3) is chucked by a conveying device (not shown). The directional movement device 15 conveys the film material F while maintaining a substantially horizontal state.

[Vertical cutter]
The vertical cutting cutter 12 (FIGS. 1A and 2) cuts the sealed portion S1 of the film material F along the vertical direction D1 (vertical cutting step St2). The vertical cutting cutter 12 cuts adjacent regions R in the horizontal direction D2.
The longitudinal cutter 12 cuts the film material F over the entire thickness direction. Therefore, it is possible to separate the regions R cut by the longitudinal cutter 12 in the horizontal direction D2.
"Separation" refers to spatial separation. In other words, the spacing between regions R means that adjacent regions R are spatially separated from each other.

The film material F is cut when sent by the nip rollers 13 to the vertical blades 121 and 122 installed at predetermined positions.
The vertical cutting cutter 12 has vertical blades 121 and 122 for cutting the film material F, with only one blade per region R adjacent in the horizontal direction D2.
In the film material F of the present embodiment, since three regions R are arranged in the horizontal direction D2, the longitudinal cutter 12 has a total of two vertical blades 121 and 122 corresponding to these three regions R. I have. The vertical blades 121 and 122 are arranged at intervals corresponding to the width of the film 2 . If the width of the film-like material 2 to be manufactured or the number of regions R arranged in the horizontal direction D2 are changed, the positions and number of vertical blades are changed.

In this embodiment, as shown in FIG. 1(b), the film material F is not provided with a waste allowance in the horizontal direction D2, and the film material F is cut between the regions R in the horizontal direction D2 by one vertical blade. Therefore, unlike the case where the waste allowance F2 is set in the lateral direction D2 (FIG. 9B), no scraps corresponding to the waste allowance are generated. Since there is no need for a device for winding up the chips, the configuration of the device is simple.
It should be noted that the film material F does not have a disposal allowance in the longitudinal direction D1.

The film material F cut along the vertical direction D1 by the vertical blades 121 and 122 is fed forward by the nip roller 13 and further cut along the horizontal direction D2 by the transverse cutter 14 .
Here, the nip rollers 13 are arranged upstream of the transverse cutter 14 in order to securely feed the film material F continuous in the longitudinal direction D1 while being nipped between the nip rollers 13 .

[Cross cutter]
The transverse cutter 14 (Figs. 1(a) and 2) cuts the seal portion S2 of the film material F along the transverse direction D2 (traverse step St3). The transverse cutter 14 cuts adjacent regions R in the vertical direction D1.
The transverse cutter 14 cuts the film material F over the entire thickness direction in the same manner as the longitudinal cutter 12 . Therefore, it is possible to separate the regions R cut by the transverse cutter 14 in the longitudinal direction D1.

The horizontal cutter 14 (FIGS. 1A and 2) has only one horizontal blade 141 that cuts the film material F by, for example, reciprocating motion. The horizontal blade 141 cuts the film material F over the entire width of the film material F, that is, from one end to the other end in the horizontal direction D2.
As shown in FIG. 1(b), since the film material F has no waste margin in the longitudinal direction D1, no scraps are generated for the waste margin in the longitudinal direction D1.
In the film material F, only chips f (FIG. 1(a)) generated by punching the punched portion P into the shape of the corner portion C are generated. The punching point P corresponds to a point in the film material F where the side of the region R in the vertical direction D1 and the side in the horizontal direction D2 intersect.

The four sides of the area R are separated from the adjacent areas R through the process (St2) by the longitudinal cutter 12 and the process (St3) by the transverse cutter 14 .
At the time when the film material F is cut by the lateral cutter 14, the rear end of the region R positioned downstream of the horizontal blade 141 and the front end of the region R positioned upstream of the horizontal blade 141 are separated from each other. are in close proximity. When the film material F is sent to the punching device 3 by the nip rollers 13 in this state, the rear end of the region R adjacent in the longitudinal direction D1 is moved by the operation of the longitudinal movement device 15 (longitudinal separation portion) at the time of punching. separated from the front end.

On the other hand, the regions R, which can be separated in the horizontal direction D2 by cutting with the horizontal cutter 14, are separated by the action of the horizontal separation portions (32, 42) provided in the punching device 3 during punching. That is, as shown in FIG. 1A, a gap G is formed between regions R adjacent in the lateral direction D2.
In this embodiment, in consideration of the positional accuracy of feeding of the nip rollers 13 and the positional deviation of the punching point P caused by the meandering of the film material F to be fed, when punching the film material F, the vertical direction D1 and the horizontal direction The main feature is that the regions R are separated in both D2.

[Vertical movement device]
The vertical movement device 15 (FIGS. 1A and 2) moves the region R (R2) adjacent to the front side of the region R (R1) conveyed to the punching device 3 by the nip rollers 13 forward in the vertical direction D1. , the regions R1 and R2 adjacent to each other in the vertical direction D1 are separated from each other.
From the timing at which the punching point P is punched from the front end Rf of the region R1 which is sent by the nip roller 13 and stops at the position of the die 41 and the punch 31 (FIG. 3) of the punching device 3 at a moving speed of 0 or almost 0. The longitudinal movement device 15 is driven such that the rear end Rr of the region R2 is spaced forward by an appropriate distance. The distance may be, for example, a dimension (Δy) corresponding to the conventional waste margin F1 in the vertical direction D1.
The longitudinal movement device 15 can be driven continuously or can be driven intermittently in synchronization with the feeding by the nip rollers 13 . The driving speed of the longitudinal movement device 15 may be variably controlled.

The longitudinal displacement device 15 is preferably a so-called vacuum belt. The vertical movement device 15 includes a hollow belt 151 having holes (not shown) on the front side, a vacuum pump (not shown) for sucking the inside of the belt 151, a pulley 152 (FIG. 2) around which the belt 151 is wound, and a pulley 152 includes a drive motor (not shown) and the like.
The inside of the belt 151 is decompressed by the vacuum pump, so that the film material F is attracted to the surface of the belt 151 . By driving the belt 151 forward in the longitudinal direction D1, while stably holding the film material F on the belt 151, the front end Rf of the upstream region R1 is shifted to the downstream region R2. It is possible to reliably separate the rear end Rr.

The means for advancing the film material F to separate the regions R is not limited to the vacuum belt. For example, the film material F sandwiched between a pair of driven belts may be advanced by the driving force of the belts, or the film material F may be held and advanced by a vacuum chuck.

[Punching device]
Next, the punching device 3 (FIGS. 1 to 3) will be described. The punching device 3 punches the punched portion P of the film material F fed by the nip rollers 13 to the position of the punch 31 and the die 41 into the shape of the corner portion C (punching step St4).
As shown in FIG. 3, the punching device 3 includes, as main components, a punch 31 and a die 41, which are metal molds for punching a punching point P to form a corner portion C, and a periphery of the punching point P. A pair of curved blocks 32 and 42 are provided as lateral direction separating portions for separating the region R in the lateral direction D2 by curving the film material F in .

The punching device 3 is provided with a plurality of sets (four sets in this case) necessary for forming the corner portions C between the regions R in the lateral direction D2 on the film material F and at both ends of the film material F in the lateral direction D2. of punch 31 and die 41.
The punch 31 and the die 41 are formed in a shape corresponding to the shape of the corner portion C. As shown in FIG. As shown in FIG. 4, the respective blades 31e, 41e of the punch 31 and the die 41 are arc-shaped or substantially arc-shaped. In addition, when the shape of the corner portion C is linear, the punch 31 and the die 41 are also formed in a linear shape.

As these punches 31 and dies 41, as shown in FIGS. 3 and 4, a center punch 31C and a die 41C used between the regions R, and a side punch 31C and a die 41C used at the ends of the film material F in the lateral direction D2. of punch 31S and die 41S are used.
It is preferable that the edge 31e of the punch 31S for the side and the edge 41e of the die 41S are formed in a shape that escapes outward in the lateral direction D2 in order to prevent burrs at the corner portion C. As shown in FIG.

The bending blocks 32 and 42 sandwich the film material F and elastically deform it so as to bend in the out-of-plane direction. These curved blocks 32 and 42 function as molding jigs.
A movable curved block 32 interlocking with the punch 31 has a movable curved wall 32 r facing the fixed curved block 42 . The movable curved wall 32 r is formed in a convex shape toward the fixed curved block 42 .
The fixed curved block 42 has a fixed curved wall 42 r facing the movable curved block 32 . The fixed curved wall 42r is formed in a concave shape following the shape of the movable curved wall 32r.
The curved blocks 32 and 42 also have center curved block walls 32C and 42C and side curved blocks 32S and 42S.

(Fixed part)
A fixed part 40 (FIGS. 3 and 4) is configured including one die 41 (41C or 41S) and one fixed curved block 42 (42C or 42S) integrally provided around the die 41. there is
The die 41C and the fixed bending block 42C are not limited to this embodiment in which the die 41C and the fixed bending block 42C are integrally formed, and the die 41C and the fixed bending block 42C may be separate bodies. The same applies to the die 41S and the fixed bending block 42S.

In the punching device 3 of this embodiment, the four fixing parts 40 are arranged on the lower plate 410 based on the pitch of the punching points P in the horizontal direction D2 (corresponding to the width of the film-like material 2). there is A pressing block 47 is preferably installed between the fixed portions 40 on the lower plate 410 . The fixed part 40 and the pressing block 47 are fixed to the base 4 (FIG. 3) via the lower plate 410 .

When changing the dimension of the film-like material 2 in the lateral direction D2, the fixed part 40 and the holding block 47 are installed at positions suitable for the dimension after the change. , by installing it at a position that conforms to the dimensions of the film-like material 2 after the change. Such a mold change operation enables the manufacturing apparatus 1 to manufacture a plurality of types of films 2 having different sizes.
This is possible because the dies for punching both ends of the region R in the lateral direction D2 are not integrated but separate. In this embodiment, each fixing part 40 and the pressing block 47 are formed separately. Similarly, the movable portion is not integrally formed so as to straddle a plurality of punching points P, but is separately formed for each punching point P. As shown in FIG.
When the dimension of the film 2 in the vertical direction D1 changes, the position of the horizontal blade 141 of the horizontal cutter 14 (FIG. 1(a)) is changed or the installation position of the punching device 3 is changed, and the nip roller 13 is changed. By changing the length of one takt for feeding the film material F, it is possible to cope without changing the type of the punching device 3.

(movable part)
The movable bending block 32 is pressurized downward while being allowed to move in the vertical direction so that the periphery of the punched portion P of the film material F is pressed against the fixed bending wall 42r of the fixed bending block 42. is preferred. By doing so, it is possible to punch out the punched portion P of the film material F while the periphery of the punched portion P of the film material F is pressed by the movable bending block 32 and the fixed bending block 42 . This can be realized because the punch 31 and the movable bending block 32 are configured separately.
The movable bending block 32 is supported by a punch plate 310 via a plate 34 that receives a spring 331 of a first pressing portion 33 (FIG. 3) that presses the movable bending block 32 downward. The punch plate 310 is supported by beams 36 provided on a pair of pillars 35 erected on the base 4 . The punch plate 310 is vertically moved while being guided by the supports 35, 35 during punching.

The punch plate 310 is preferably provided with a second pressing portion 37 for pressing the film material F against the pressing block 47 in addition to the first pressing portion 33 . The second pressing portion 37 presses the film material F toward the pressing block 47 between the punching locations P (three locations) adjacent to each other in the lateral direction D2 by the weight of the rod 371 and the like. More preferably, the second pressing portion 37 presses the film material F at the center between the punching locations P adjacent in the lateral direction D2.
Since the film material F is pressed by the first pressing part 33 and the second pressing part 37, the film material F can be stably punched by the punch 31 and the die 41 without unintentionally moving.

(Spacing between regions in the horizontal direction)
Now, when the punch plate 310 descends toward the film material F fed in a substantially horizontal state as shown by the solid line in FIG. Since the lower end portion 372 of the pressing portion 37 abuts against the pressing block 47 via the film material F, the second pressing portion 37 presses the film material F against the pressing block 47 .
Next, the curved wall 32r of the movable curved block 32 abuts against the curved wall 42r of the fixed curved block 42 via the film material F, and the spring 331 of the first pressing portion 33 is compressed, so that the film material F is movable curved. It is sandwiched between the block 32 and the fixed bending block 42 and pressed by the elastic force of the spring 331 .

Then, the film material F around the punched part P follows the shape of the curved walls 32r, 42r and is deformed so as to be curved (one-dot chain line in FIG. 3). Accordingly, as shown in FIG. 5(b), the position of the edge E in the lateral direction D2 of each region R is the edge in the lateral direction D2 when the film material F is in a horizontal state (FIG. 5(a)). It is displaced to the inside (central side) of the region R with respect to the position of the edge E. The width dimension of the region R does not change even if the region R is curved. The distance Xb (FIG. 5(b)) measured horizontally from edge E to edge E of region R when curved is short. If the region R is displaced inwardly of the region R by the difference between Xa and Xb, a gap Δx having the dimension of the difference between Xa and Xb is generated between the regions R adjacent in the lateral direction D2. .

Here, when the film material F is bent by the bending blocks 32 and 42, if the center between the punching points P and P (the center of the region R in the lateral direction D2) is pressed by the second pressing portion 37, By uniformly deforming the range indicated by r1 and the range indicated by r2 in FIG. Thereby, it is possible to obtain a uniform gap Δx between the regions R (there are two places), which is preferable.

[Effects of this embodiment]
In this embodiment, in punching, in addition to separating the region R in the horizontal direction D2 by curving it in the horizontal direction D2 as shown in FIG. As shown in 6(a), the area R is moved forward in the vertical direction D1 to separate it also in the vertical direction D1. Here, since the entire four sides of the region R including the punching point P are cut off by the longitudinal cutter 12 and the transverse cutter 14 before punching, the regions R are separated smoothly.
Now, as shown in FIG. 6B, at the punching points P corresponding to the corners of the four regions R, there are gaps .DELTA.x in the horizontal direction D2 and gaps .DELTA.y in the vertical direction D1. In this state where the regions R are spaced apart in both the vertical direction D1 and the horizontal direction D2, when the punching point P is punched by the punch 31C, the design position of the blade is indicated by the broken line in FIG. , the area of the film material F marked with a hatched pattern is die-cut. This area corresponds to the scrap f (FIG. 1(a)) of the film material F accompanying punching. Chips f of the film material F punched from above by the punch 31 fall below the film.

Here, even if the punch 31C is relatively displaced to the position indicated by the two-dot chain line with respect to the plane center P0 of the punching location P due to the positional deviation of the film material F with respect to the position of the blade of the punch 31C, Within the range of the gaps Δx and Δy, the arc-shaped blade of the punch 31C punches out any of the four regions R. Therefore, corner portions C without sharp points can be formed in each region R, and sharp burrs do not occur. In other words, the gaps Δx and Δy obtained by separating the regions R absorb the displacement of the film material F with respect to the punch 31C, thereby avoiding defective molding of the corner portions C of the film-like material 2. can.
An effect similar to this can also be realized by setting the film material F with discard margins F1 and F2 (FIG. 9(b)). However, in this case, the yield of the film material F is poor due to the disposal allowances F1 and F2.

Although illustration is omitted, the edge E of the region R is shifted inward in the horizontal direction D2 in the same manner as the other punching locations P at the punching locations P at both ends of the film material F in the horizontal direction D2. . A side punch 31S (FIG. 4) may be positioned above the edge E position. Even if the position of the punching point P is shifted in the vertical direction D1 with respect to the side punch 31S, it is allowed as long as it is within the range of the gap Δy in the vertical direction D1 created between the regions R by the vertical movement device 15. be done.

Regarding the sides of the film material F, it is not necessary to bend the film material F to shift the edges E inward. Therefore, the walls (32r, 42r) sandwiching the film material F of the blocks 32S, 42S on both sides may be flat in the horizontal direction without being curved. Furthermore, the punching device 3 may not have the blocks 32S and 42S corresponding to the punches 31S and dies 41S on both sides. Also in this case, the end of the film material F in the horizontal state can be punched out by the punch 31S positioned above it and the die 41S that receives the punch 31S.

When the punching is completed, the film-like material 2 with the formed corners C is discharged from the punching device 3 and the vertical movement device 15 toward an inspection device, a filling device, or the like. The curved film-like material 2 is restored to a horizontal state at the time of discharge.

According to the present embodiment described above, the film material F is formed by punching the punching points P in a state in which the regions R located at the punching points P are separated in both the longitudinal direction D1 and the horizontal direction D2. , it is possible to reduce the molding defect rate and improve the yield of the film material F without setting a waste allowance in the vertical direction D1 and the horizontal direction D2. According to this embodiment, almost the entire film material F can be effectively used for the product, except for the scraps f in a small area corresponding to the shape of the corner portion C, so that the manufacturing cost can be reduced. be able to.

The dimensions of the gaps .DELTA.x and .DELTA.y provided between the regions R at the time of punching can be appropriately determined according to the dimensions of the film-like material 2 and the like. As the gaps Δx and Δy are increased, the permissible shift amount of the punched portion P with respect to the punch 31 is increased. Depending on the permissible amount of deviation of the punched portion P, the film material F may not necessarily be held down by the second pressing portion 37. Therefore, the periphery of the punched portion P may be pressed only by the first pressing portion 33. FIG. Alternatively, without pressing the film material F with either the first pressing part 33 or the second pressing part 37, the periphery of the punched part P is sandwiched between the curved blocks 32, 42 to suppress the displacement of the film material F. The punched portion P may be punched while doing so. In that case, the first pressing portion 33, the second pressing portion 37 and the pressing block 47 are not required.

Although the film material F does not require a waste allowance for improving the yield, the film material F can be provided with an area that is not used as a product according to other needs.
FIG. 7 shows an example in which margins F3 that are not used as a product are given to both ends of the film material F in the horizontal direction D2. The margins F3 are provided on the film material F for gripping both ends of the film material F on the upstream side of the longitudinal cutter 12, for example. The vertical cutting cutter 12 is additionally provided with vertical blades 123 and 124 for cutting the margin F3.

In addition to the above, it is possible to select the configurations described in the above embodiments or to change them to other configurations as appropriate without departing from the gist of the present invention.

When manufacturing a film material having a width corresponding to the full width of the film material F, the vertical cutting process (St2) is not required, so the vertical cutting cutter 12 is not used. If only a film-like product corresponding to the entire width of the film material F is to be manufactured, the longitudinal cutter 12 in the manufacturing apparatus 1 and the horizontal separation portions (curving blocks 32 and 42) of the punching apparatus 3 are not required.
Since vertical cutting is not performed, even if there is no space between the regions R in the horizontal direction D2, the vertical moving device 15 creates a gap Δy in the vertical direction D1 between the regions R separated by the horizontal cutting. This gap .DELTA.y can provide the effect of absorbing the positional deviation of the film material F in the longitudinal direction D1, thereby contributing to the improvement of the yield.

Instead of bending the film material F between the curved wall 32r of the curved block 32 and the curved wall 42r of the curved block 42 as in the above embodiment, as shown in FIGS. , the film material F may be curved.
In FIG. 8A, the film material F is curved by being pushed downward by the member 39 between the punching points P, P adjacent in the lateral direction D2.
In FIG. 8(b), the film material F is curved by being pushed upward by the member 39 between the punching points P, P adjacent in the lateral direction D2.
In both FIGS. 8A and 8B, the vertically movable member 39 corresponds to the lateral separation section.
Even when the film material F is curved as shown in FIGS. 8(a) and 8(b), the regions R can be separated in the lateral direction D2 as in the above embodiment.
Although illustration is omitted, the member 39 shown in FIG. 8A and the member 39 shown in FIG. The gap between the extraction points P, P may be curved in a wavy shape.

The film material F shown in FIG. 8( a ) is curved upward at the punched portion P. In the punching device 3 of the above embodiment, if the film material F is bent in the direction shown in FIG. should be flipped to In this case, the curved blocks 32 and 42 have a shape in which the page of FIG. 3 is turned upside down.

FIG. 8(c) shows an example in which the movable bending block 38 and the fixed bending block 48 indicated by dashed lines are used to separate the regions R in both the vertical direction D1 and the horizontal direction D2. The curved blocks 32, 42 (FIG. 3) of the above embodiment are curved in the lateral direction D2, whereas the curved blocks 38, 48 are curved not only in the lateral direction D2 but also in the longitudinal direction D1. That is, both when viewed in the longitudinal direction D1 and in the lateral direction D2, the movable bending block 38 is formed in a convex shape toward the fixed bending block 48 positioned below. It is formed in a concave shape following the movable bending block 38 . These curved blocks 38 and 48 can serve as both a lateral separation section and a vertical movement section.

1 film-like material manufacturing device 2 film-like material 3 punching device (punching part)
4 Base 9 Mold 9R Feed roller 11 Welding device 12 Vertical cutting cutter (longitudinal cutting part)
13 Nip roller (conveyor)
14 Horizontal cutter (transverse part)
15 longitudinal movement device (longitudinal separation part)
31, 31C, 31S Punch 31e Blades 32, 32C, 32S, 38 Movable bending block (horizontal direction separating part, molding jig)
32r Movable curved wall 33 First holding portion 34 Plate 35 Post 36 Beam 37 Second holding portion (holding portion)
39 Member (Lateral Separation Part)
40 fixed parts 41, 41C, 41S die 41e blades 42, 42C, 42S, 48 fixed curved blocks (horizontal direction separating parts, molding jigs)
42r Fixed curved wall 47 Holding block 90 Punch 90A Pointed end portion 91 Vertical cutting cutter 99 Burr 111 Vertical welding part 112 Horizontal welding part 121, 122, 123, 124 Vertical blades 131, 132 Roller 141 Horizontal blade 151 Belt 152 Pulley 310 Punch plate 331 Spring 371 Rod 372 Lower end portion 410 Lower plate B Product C Corner portion D1 Vertical direction D2 Lateral direction E Edge F Film material f Chips F1, F2 Waste allowance F3 Margin G Gap P Punching point P0 Plane center R , R1, R2 area (film area)
Rf Front end Rr Rear end S Sealing portion S1 Vertical sealing portion S2 Horizontal sealing portion St1 Welding step St2 Vertical cutting step St3 Horizontal step St4 Punching step Xa Distance Xb Distance Δx, Δy Gap

Claims (12)

A device for manufacturing a film-like object with molded corners from a film material,
a conveying unit that conveys the film material, which is a set of film regions corresponding to the film-like object, in the vertical direction;
a transverse section that cuts the film material along a transverse direction that intersects the longitudinal direction;
a punching part for punching a punched portion where the vertical side and the horizontal side of the film region intersect into the shape of the corner portion;
a longitudinal separation unit that separates the film regions adjacent in the longitudinal direction by moving forward the film region adjacent to the front side of the film region transported to the punching unit by the transport unit; comprising
A film-like material manufacturing apparatus characterized by: further comprising a longitudinal cutting section that cuts the film material along the longitudinal direction;
The punching part is
a punch and a die for punching the punched portion to form the corner portion;
a lateral separation portion that separates the film regions adjacent to each other in the lateral direction by curving the film material when punching the punched portions;
The film-like material manufacturing apparatus according to claim 1. The transverse portion is
Equipped with only one horizontal blade for cutting the film material,
The longitudinal section is
Only one vertical blade for cutting the film material is provided between the film regions in the lateral direction,
3. The apparatus for manufacturing a film-like material according to claim 2. The lateral separation part is
A pair of curved walls sandwiching the film material from both sides around the punched portion,
The pair of curved walls are
a movable curved wall interlocking with the punch;
a fixed curved wall with a fixed position;
4. The apparatus for manufacturing a film material according to claim 2 or 3. The movable curved wall is formed in a convex shape toward the fixed curved wall,
The fixed curved wall is formed in a concave shape following the shape of the movable curved wall,
5. The apparatus for manufacturing a film-like material according to claim 4. A molding jig having the movable curved wall,
provided separately from the punch around the punch,
pressurized toward the fixed curved wall during punching of the punching location;
6. The apparatus for producing a film material according to claim 4 or 5. From the rear side to the front side in the vertical direction,
Arranged in the order of the vertical cutting section, the conveying section, the transverse section, and the punching section,
The film-like material manufacturing apparatus according to any one of claims 2 to 6. The longitudinal separation is
comprising a belt that adsorbs the film material to the surface by internal suction,
The film-like material manufacturing apparatus according to any one of claims 1 to 7. Further comprising a pressing portion that presses the film material from both sides when punching the punched locations between the punched locations that are adjacent in the lateral direction,
The film-like material manufacturing apparatus according to any one of claims 1 to 8. A bag-making machine that manufactures a bag using a film material composed of films that are continuously laminated,
A welding device for applying heat to a predetermined seal area of the film material to weld the superimposed films together,
The vertical cutting part and the transverse part for cutting the film material along the longitudinal direction cut the sealing part made of the film welded by the welding device,
The punching part punches the sealing part,
The film-like material manufacturing apparatus according to any one of claims 1 to 9. A method for producing a film-like article with molded corners from a film material, comprising:
The film material is a set of film regions corresponding to the film-like object,
a transverse step of cutting the film material along a transverse direction crossing the longitudinal direction in which the film material is transported;
a punching step of punching a punched portion where the vertical side and the horizontal side of the film region intersect into the shape of the corner portion;
A method for producing a film-like material, characterized by: further comprising a vertical cutting step of cutting the film material transported in the vertical direction along the vertical direction;
In the punching step,
By moving the film region adjacent to the front side of the film region forward in the longitudinal direction, the film regions adjacent in the longitudinal direction are separated, and the film material is removed when the punching location is punched. By bending, the punched portions are punched while the film regions adjacent to each other in the lateral direction are separated from each other.
The method for producing a film-like material according to claim 11.

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