JP2633474B2 - Scrap processing equipment in film punching machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scrap processing apparatus for a film punching machine, and more particularly to an apparatus for processing scrap of a thermoplastic synthetic resin film.

[0002]

2. Description of the Related Art For example, a bag making machine for manufacturing a plastic bag is provided with a punching machine for making a hole for a handle in the plastic bag, and a large number of scraps are produced from the punching machine. Conventionally, in order to treat this scrap, a method has been adopted in which the scrap is dropped by blowing air onto a blade die and a die of a punching machine, and the scrap is collected by a pallet or the like.

[0003]

Incidentally, the scraps deposited on the pallets and the like are bulky and difficult to process later, and if handled carelessly, the scraps are scattered by the wind and the disposal is poor.

Accordingly, an object of the present invention is to provide a scrap processing apparatus capable of easily processing scrap coming out of a film punching machine.

[0005]

For this purpose, the following scrap processing apparatus for a film punching machine was created. That is, the invention according to claim 1 is an apparatus for processing scrap formed when a thermoplastic synthetic resin film is punched by a blade die of a film punching machine, and a guide section for sequentially guiding the scrap to a predetermined lower position. A locking portion formed to be able to lock the scraps guided by the guide portion and retaining a large number of scraps; and heating means for heating the scraps retained in the locking portion. The stop is provided with a through hole through which the scrap in a state of being melted or softened by the heating of the heating means can pass. According to a second aspect of the present invention, in the scrap processing apparatus according to the first aspect, a pusher that pushes the scrap punched by the blade die into the guide portion, and a pusher that penetrates the locking portion in a lump state fused to each other. Cutting means capable of appropriately cutting a large number of scraps passing through the holes.

[0006]

The scrap punched by the blade die of the film punching machine is guided by the guide portion and stays in the locking portion sequentially, and is melted or softened by the heating of the heating means. Then, a large number of scraps are fused to each other, form a viscous mass, and pass through the through-hole. In addition, while the stamper pushes the punched scrap securely into the guide portion, when the scrap mass passes through the through hole of the locking portion,
It can be cut into appropriate lengths by cutting means.

[0007]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a main part of a film punching machine used in a bag making machine, FIG. 2 is a side view of a main part, and FIG. 3 is an enlarged longitudinal sectional view of a scrap processing apparatus. As shown in FIGS. 1 and 2, a frame 1 of a film punching machine is used.
A lower base 3 is fixed on the upper side via a block 2, and a lower mold holder 4 is attached to the lower base 3. As shown in FIG. 3, a cushion rubber 5 is fitted into a concave portion 4a on the upper surface of the lower mold holder 4, and a die plate 6 made of a steel plate is placed thereon. In the die plate 6, the cushion rubber 5, and the lower mold holder 4, through holes 6a, 5a, 4b slightly smaller than scraps to be described later are formed on the same vertical line, and the lower base 3 is larger than the through holes. A through hole 3a large enough to allow the scrap to easily pass is formed. In FIG. 3, reference numeral 3b denotes a cooling water channel provided in the lower base 3, and the sealing portion of the synthetic resin film bag heated by the sealing device of the bag making machine is not illustrated as the lower base 3. And is cooled by being sandwiched between the upper pressing portions.

On the other hand, as shown in FIGS. 1 and 2, an upper die holder 8 is fixed to a movable base 7 configured to move toward and away from the lower base 3. In the embodiment, an upper die 9 having an oval cutting blade (blade type) is attached. Three electric heaters 10 are embedded in the upper die 9 to heat the cutting blade to a predetermined temperature. The upper die 9 is provided with a through hole 9a for a knockout pin (described below). That is, in this punching machine,
The heated upper mold 9 is pressed against the synthetic resin film F placed on the die plate 6, and the synthetic resin film F is punched into a shape of a cutting blade of the upper mold 9.

On the upper surface of the movable base 7, a gate-shaped support frame 1 is provided.
1 is attached, and the air cylinder 12 is installed on the support frame 11 in a downward direction. Rod 1 of air cylinder 12
Two rod-shaped knockout pins 13 are attached to 2a, and these constitute a pusher referred to in the present invention. The knockout pin 13 is always at a retracted position above the upper die 9 (see FIG. 1), and can be lowered to a predetermined position through the through hole 9a of the upper die 9 by the operation of the air cylinder 12. Therefore, the knockout pin 13 pushes down the scrap of the synthetic resin film F punched by the upper die 9 below the lower die holder 4 and can be reliably pushed down into the guide portion 21 described below. -ing

[0010] A scrap processing device 20 is provided below the lower base 3. This will be described below. Note that FIG. 3 shows a state in which the upper die 9 is at the lowered position, and the cutting blade of the upper die 9 contacts the die plate 6 to punch out the synthetic resin film F. Figure 1
As shown in FIG. 3, the lower base 3 is provided with a cylindrical guide portion 21 having a through-hole 21 a having an oval cross section corresponding to the scrap punched by the upper die 9 (having substantially the same shape as the through-hole 3 a). The upper surface of a substantially rectangular parallelepiped heater block 22 suspended from the frame 1 by suspension bolts 22a is in contact with the lower end surface of the guide portion 21. The heater block 22 is also formed with an oval-shaped through-hole 22b substantially the same as the through-hole 3a.
Although a and 22b are arranged on the same vertical line, the outlet is narrowed because a flange-shaped locking portion 22c is provided at the lower end of the heater block 22. in this case,
The inner edge of the locking portion 22c is a through hole 22d according to the present invention, but instead of the locking portion 22c and the through hole 22d, a through hole 2d is used.
2b may be a tapered hole.

The heater block 22 has a through hole 22 formed therein.
As a heating means, for example, a cartridge type electrothermal heater 23 is embedded in a position avoiding the b.
The inner periphery of 2b is heated to a predetermined temperature. The guide portion 21 and the through hole 2 of the heater block 22
The inner peripheral surface of 2b is coated with a fluororesin (Teflon) in order to facilitate the passage of scrap.

A mounting blade 24 mounted on the frame 1 has a stationary blade 25 extending in the horizontal direction,
5, a rail 27 for guiding the moving blade 26 along the moving blade 5,
And an air cylinder 28 for driving the motor 6.
The stationary blade 24 is arranged so as not to close the through hole 22b of the heater block 22. The moving blade 26 is fixed to a rod 28 a of an air cylinder 28, and when the rod 28 a moves, the moving blade 26 slides with its bent portion placed on the rail 27. The above is the cutting means in the present invention.

The operation of the scrap processing apparatus 20 configured as described above will be described with reference to FIGS. 1 to 3 and FIG. 4 showing an outline of a change in the form of scrap. The upper die 9 is pressed down while the thermoplastic synthetic resin film F, for example, vinyl or polyethylene, transferred to the film punching machine incorporated in the bag making machine is accurately positioned with respect to the die plate 6. , Is punched into a predetermined shape (an oval shape in this embodiment). This scrap is indicated by a in FIG. Subsequently, the air cylinder 1
The knockout pin 13 pushes down the scrap punched by the upper die 9 into the guide portion 21 (FIG. 4).
See b in). At this time, since the scrap is flexible, it is bent appropriately, and the respective through holes 6 of the die plate 6, the cushion rubber 5, and the lower mold holder 4 are easily formed.
a, 5a, 4b, but once through the through holes 3 in the lower base 3.
Even if the scrap entered into a rises by attaching to the knockout pin 13, the scrap is caught by the lower end of the lower mold holder 4 and separated from the knockout pin 13 at that position.

In this way, the scraps pushed one after another into the guide portion 21 fall into the heater block 22,
It is locked by the locking portion 22c and stays (c in FIG. 4).
Since the heater block 22 is heated by the heater 23, the scrap is heated here. At this time, the scrap may be completely melted. However, from the viewpoint of thermal efficiency, it is better to control the amount of heat and stop the scrap so that only the outer peripheral portions fuse together. It is preferable from the viewpoint of easiness.

A large number of the scraps heated as described above are fused together (d in FIG. 4), and become a viscous mass and gradually come off the engaging portions 22c of the heater block 22. Then, the scrap lump (e in FIG. 4) hanging down from the through hole 22d is gradually cooled by the atmosphere and the outer peripheral portion starts to solidify. Next, the air cylinder 28 is operated at an appropriate timing, and the hanging lump of scrap is pushed off by the stationary blade 25 and the moving blade 26 and dropped (FIG. 4).
Inside f).

In this embodiment, the shape of the scrap, that is, the cutting blade (blade type) is an oval shape.
The shape may be any shape such as a corner or a half moon. In addition, it is needless to say that the present invention can be implemented in various modified embodiments based on the knowledge of those skilled in the art.

[0017]

As described above, according to the present invention,
Since a large number of thermoplastic synthetic resin film scraps coming out of the film punching machine can be discharged in a lump,
The processing becomes extremely simple. Further, by cutting the scrap into appropriate lengths, the post-processing is further facilitated.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a film punching machine.

FIG. 2 is a side view of a main part of the film punching machine.

FIG. 3 is an enlarged longitudinal sectional view showing a scrap processing apparatus.

FIG. 4 is a diagram illustrating a change in the form of scrap.

[Explanation of symbols]

 Reference Signs List 1 frame 3 lower base 6 die plate 9 upper die 12 air cylinder 13 knockout pin 21 guide portion 22 heater block 22c locking portion 22d through hole 23 heater 25 static blade 26 moving blade 28 air cylinder

Claims (2)

(57) [Claims] 1. A device for processing scrap produced when a thermoplastic synthetic resin film is punched by a blade die of a film punching machine, comprising: a guide portion for guiding the scrap to a predetermined position below a punching position; A locking portion for locking and retaining the scrap guided by the guide portion, and a heating means for heating the scrap retained in the locking portion,
A scrap processing apparatus in a film punching machine, wherein the engaging portion is provided with a through hole through which the scrap melted or softened by the heating means can pass. 2. A pusher for pushing the scrap punched by the blade die into the guide portion, and a cutting means capable of appropriately cutting a large number of scraps passing through the through holes of the locking portion in a state of being fused together. The scrap processing apparatus in a film punching machine according to claim 1, further comprising: