JP3020311B2 - Cutting device for heating element production - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for producing a heating element (hereinafter simply referred to as a cutting device). More specifically, a sheet in which a plurality of heating elements filled with a heating composition are continuously formed (hereinafter, simply referred to as a heating element sheet)
And a cutting device for cutting each of the heating elements into corners without wasting the packaging material.

[0002]

2. Description of the Related Art Conventionally, in a heating element manufacturing apparatus (hereinafter simply referred to as a manufacturing apparatus) 41 as shown in FIG. 4, two packaging materials 42 supplied from separate rollers are sealed with a die roll for sealing (hereinafter referred to as a die roll). While continuously forming a plurality of storage sections by heat sealing with a die roll 43), the storage section is filled with a predetermined amount of the heat-generating composition from a hopper 44, and after filling, the unheat-sealed sections are removed. Heat sealed. Then, the heat-sealed portion of the heating element sheet thus completed is cut by a vertical cutting machine (slitter) 45 in the manufacturing apparatus 41 to be separated into rows. A plurality of sheets in which heating elements are arranged in a row are cut by a horizontal cutting machine (cutter) 46 for each heating element.

[0003] The heating element thus completed has a quadrangular shape, and the four corners stimulate the wearer's skin and are extremely unpleasant. Therefore, in order to cut and remove the four corners, new processes and new equipment are provided. As a result, the manufacturing cost of the heating element has been high.

[0004] In order to solve the problem, recently, a cutting device has been provided which can cut and remove the four corners simultaneously with cutting of each heating element pack.

As shown in FIG. 5, this cutting apparatus 51 has a die 52 having a blade 52 formed in a shape of a final heating element, in which four corners of a square are removed (hereinafter simply referred to as a corner cut angle). It comprises a cylinder 53 and an anvil cylinder 54 for clamping the heat seal portion of the heating element together with the blade 52.

The die cylinder 53 and the anvil cylinder 54 rotate in opposite directions while abutting each other.

[0007] The outer peripheral surface of the die cylinder 53 has a corner-cut blade.
52 are formed so as to be slightly spaced from each other in the axial direction and the circumferential direction. And the blade 52 in the corner cut corner shape
A substantially rectangular recess 55 slightly smaller than the corner cut angle is formed on the inner surface surrounded by. The recess 55 is a space for preventing the bag filled with the heat generating composition from being pressed when the heat generating sheet is cut. And anvil cylinder
A recess 56 having the same shape is formed in the recess 54 so as to correspond to the recess 55 of the die cylinder 53.

The cutting device 51 cuts the heating element sheet S sent from the die roll into a final product shape by sandwiching the heating element sheet S between the die cylinder 53 and the anvil cylinder 54. Under the cutting device 51, the heating elements having corner cut corners cut out one by one are sent out, while the remaining parts R of the packaging material W formed by cutting out the heating element portions and forming a large mesh are continuously output. Come.

[0009]

The conventional cutting device 51
In this case, since the adjacent corner-cutting blades 52 are spaced apart from each other, a residual portion R (the net-like material) of the packaging material is generated after the heating element is manufactured, and this is wasted. Furthermore, if the slitter 45 and the cutter 46 are used instead of the vertical / horizontal cutting type manufacturing apparatus 41 (see FIG. 4) which has been widely used in the related art, there is a problem.
That is, since there is an interval between the blades, the obtained heating element has the size of the entire heating element and the size of the bag portion filled with the heat generating composition manufactured by the conventional manufacturing apparatus (see FIG. 4). It is smaller than the heating element, and has lower heat generation performance than conventional products. In order to make it the same size as the conventional product, it is necessary to make the entire die roll larger, and as a result,
Along with widening the packaging material, other components of the manufacturing equipment (die roll support, hopper for supplying exothermic composition, etc.)
May have to be redesigned.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to use a conventional die roll as it is without waste of a packaging material and to use it in a conventional manufacturing apparatus. An object of the present invention is to provide a cutting device capable of cutting to the same size as a body.

[0011]

According to the present invention, there is provided a cutting device for producing a heating element, comprising: a die cylinder having a blade for cutting a sheet of the heating element provided on an outer peripheral surface; and an anvil opposed to the die cylinder in an axial direction parallel to the die cylinder. A cylinder, and the two cylinders are supported by a machine frame so that they can rotate in opposite directions, and the blade has a plurality of corner cut corners continuously provided in the axial direction and the circumferential direction of the die cylinder. is formed on the corner portion of the blade corresponding to each side of the turning angle is shared with the sides of the corner turning angle adjacent each Rutotomoni, four of the corner turning angle shaped blade adjacent
The corners of the
A star-shaped space is drawn, and the corresponding ambi
The cross star-shaped space is defined on each part of the outer peripheral surface of the
To pierce the debris of the sheet cut by the cutting blade
Are characterized in that the needle-shaped pins are provided in the radial direction .

At least one of a square area slightly smaller than the corner cut angle inside each corner cut angle defined by the blade or an outer peripheral surface of the anvil cylinder corresponding to the area is formed as a recess. Is preferred.

[0013]

A fork-shaped scraper is provided in the vicinity of the anvil cylinder for removing the debris from the needle pins as the respective needle pins pass therethrough, or in the vicinity of the anvil cylinder. Preferably, a suction port of means for sucking the debris by negative pressure is provided at a position where each of the needle pins passes.

Alternatively, the scraper and the suction port adjacent to the scraper may be provided together.

[0016]

The heating element sheet containing the heating composition is formed on the sheet of the heating element sent from the die roll so as to be aligned in both the vertical and horizontal directions. Each heating element is heat-sealed in a lattice shape and is divided by a heat-sealing portion having a certain width. The heat seal portion is formed in a substantially lattice shape.

The heating element sheet is sandwiched while the die cylinder and the anvil cylinder constituting the cutting apparatus of the present invention rotate in opposite directions. The blade formed so as to continuously form a plurality of corner cut angles on the outer peripheral surface of the die cylinder cuts the heating element sheet into individual heating elements just along the heat seal portion. Since there is no space between the adjacent corner cut angles, a large net-like remnant of the packaging material does not occur unlike the conventional cutting device (see FIG. 5). As described above, the packaging material is extremely wasteless, and can be easily attached to a widely used conventional manufacturing apparatus (see FIG. 4). In addition, the star space
Needle the sheet debris cut by the blade part forming
The pins are pierced and removed, causing debris to scatter around.
Never.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a cutting device according to the present invention.

FIG. 1 is a perspective view showing an embodiment of the cutting apparatus according to the present invention before assembling, and FIG. 2 is a sectional view II-I of the cutting apparatus shown in FIG. 1 after assembling.
FIG. 3 is a cross-sectional view taken along a line I, and FIG. 3 is a perspective view of a main part showing an embodiment of a manufacturing apparatus in which the cutting apparatus of FIG. 1 is incorporated.

FIG. 3 schematically shows a main part of the manufacturing apparatus 1.

Reference numeral 2 denotes a die roll, which is composed of a pair of rollers supported by the machine frame F and rotating in opposite directions while abutting on each other in parallel. It is to be sealed. Die roll 2
A hopper 3 having a plurality of supply ports for supplying the exothermic composition T is provided at an upper portion of the hopper 3. At the same time as the packaging material W is heat-sealed, a predetermined amount of the exothermic composition T is filled from the unheated portion of the packaging material W by the hopper 3 from above, and then the unheated sealing portion is heat-sealed to form a bag portion. P is formed. Below the die roll 2, a cutting device 4 for cutting the heating element sheet S sent from the die roll 2 for each bag portion P is installed.

As shown in FIGS. 1 and 2, this cutting device 4
The machine frame F is arranged parallel to each other and rotates in the opposite direction.
Is constituted by a pair of cylinders supported by the cylinder. One of the cylinders is a die cylinder 6 provided with a blade 5 for cutting the heating element sheet S on the outer peripheral surface thereof, and the other cylinder is for holding the heat sealing portion of the heating element sheet S together with the blade 5. Of the anvil cylinder 7. The heat seal portion is pressed off by being pressed by these two cylinders.

The blade 5 is formed so as to be continuous in the axial direction and the circumferential direction of the die cylinder 6 at a corner angle corresponding to the outer shape of the heating element. The portion 8 of the blade 5 corresponding to each side of the corner cut angle is shared with the side of the adjacent corner cut angle. That is, there is no space between the corner cut angles as in the blade 52 of the conventional example (see FIG. 4). On the other hand, a portion where the four corners meet each other forms a small space (hereinafter, referred to as a star space) 9 in which the blade 5 has a substantially cross star shape. A square recess 10 slightly smaller than the corner cut angle is formed in the corner cut angle so as not to pinch the bag P filled with the exothermic composition T. Further, recesses 11 are formed on the outer peripheral surface of the anvil cylinder 7 so as to correspond to the recesses 10 so as to be vertically and horizontally aligned.

A needle-like pin 12 is projected from each part of the outer peripheral surface of the anvil cylinder 7 corresponding to the star-shaped space 9. The pin 12 is used to pierce and remove a small piece (hereinafter referred to as “waste”) C of the packaging material W which is cut by the blade 5 forming the star-shaped space 9 when cutting the packaging material W.

On the side of the anvil cylinder 7 opposite to the part facing the die sinter 6, in parallel with the anvil cylinder 7,
A scraper 13 is provided slightly apart. The scraper 13 is provided with two claws (hereinafter referred to as forks) 14 at positions corresponding to the pins 13 arranged in the axial direction of the anvil cylinder 7 so that the pins 12 can pass therethrough. The pin 12 that has been rotated while piercing the debris C with the rotation of the anvil cylinder 7 passes through the forks 14, and the debris C is caught by the forks 14 and is extracted. The collected debris C can be collectively discarded if a collection box (not shown) or the like is provided below the scraper 13. In order to collect and discard the debris more reliably, a suction port 16 of a suction device 15 is disposed near each fork 14 as shown in FIGS. C may be sucked and collected at a negative pressure. Further, the suction device 15
By increasing the suction force, the scrap C may not be provided, and the debris C may be removed from the pin 12 only by the suction device 15.

In the present embodiment, the corner of the corner cut by the blade 5 is cut in a partially circular shape (see FIG. 1). However, the present invention is not limited to this.
It may be cut linearly. In the present embodiment,
The die cylinder 6 and the anvil cylinder 7 are in contact with each other (see FIG. 2), but the present invention is not limited to this. The two cylinders can press the heat seal portion of the heating element sheet. Any gap can be provided between the two cylinders.

As is apparent from the above description, the heating element to which the device of the present invention is applied is composed of two sheets of packaging material and a heat-generating composition. As the exothermic composition, those utilizing the heat of oxidation of iron powder in the presence of air and water are usually used. Of the two packaging materials for such a heat-generating composition, one is usually a breathable packaging material and the other is a non-breathable packaging material. Examples of the breathable wrapping material include a wrapping material made of a non-woven fabric or paper and a permeable plastic film (for example, a porous film having fine continuous pores), and a wrapping material made of a non-woven fabric or paper with a plastic film having perforated portions. . Examples of the non-breathable wrapping material include a wrapping material made of a non-breathable plastic film and a nonwoven fabric or paper, and a wrapping material made of a non-breathable plastic film to which an adhesive is entirely or partially applied.

According to the cutting device 4 configured as described above, the corners can be cut at the time of cutting the heating element sheet S without making the outer shape of the heating element smaller than that of the conventional one. Also, since the number of waste parts of the packaging material W is extremely small (the waste C), material costs can be saved. This is extremely convenient because the other components can be diverted to the manufacturing apparatus having the conventional slitter and cutter, which is widely used, with almost no change in other components.

[0029]

According to the cutting apparatus of the present invention, the corners can be cut together without reducing the outer shape of the heating element and reducing the waste of the packaging material. further,
There is an advantage that a conventional heating element manufacturing apparatus can be easily diverted.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a cutting apparatus according to the present invention before assembling.

FIG. 2 is a sectional view taken along the line II-II after assembling the cutting apparatus of FIG. 1;

FIG. 3 is a perspective view of a main part showing an embodiment of a manufacturing apparatus in which the cutting apparatus of FIG. 1 is incorporated.

FIG. 4 is a schematic sectional view showing an example of a conventional manufacturing apparatus.

FIG. 5 is a perspective view showing another example of a cutting machine in a conventional manufacturing apparatus.

[Explanation of symbols]

 Reference Signs List 4 cutting device 5 blade 6 die cylinder 7 anvil cylinder 8 side blade 9 star space 10 recess 11 recess 12 pin 13 scraper 14 fork 15 suction device 16 suction port F machine frame W packaging material S heating element sheet C waste

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kiyoshi Katsuriya 2-12-13 Nishi Nishi 2-chome, Joto-ku, Osaka (56) References JP-A-2-106299 (JP, A) 57-137993 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B26F 1/44 B26D 1/40 501 B26D 7/18 B65B 61/08

Claims (5)

(57) [Claims] 1. A cutting device for cutting a sheet in which a plurality of heating elements filled with a heating composition is formed into a plurality of heating elements each having a corner cut corner, wherein the heating elements are in opposite directions. Supported by the machine frame so that it can rotate
A blade for cutting the sheet is provided on a peripheral surface of a die cylinder, and an anvil cylinder facing the die cylinder in parallel with the axial direction. A plurality of corner cut angles are formed, and a portion of the blade corresponding to each side of the corner cut angle is shared with an adjacent corner cut angle side.
And the corners of the four adjacent corner-cutting blades
Is actually a cross star
A space is defined, and the corresponding anvil silin
Each part of the outer peripheral surface of the die is cut by a blade that defines the space.
The needle pin for piercing the scraps of the removed sheet has a radius
A cutting device protruding in the direction for producing a heating element. 2. A square area slightly smaller than each corner cut angle defined by each of the corner cut angles defined by the blade, or at least one of an outer peripheral surface of an anvil cylinder corresponding to the area is formed in a recess. The cutting device according to claim 1, wherein the cutting device is formed. 3. The device according to claim 3 , wherein
Each of the needle-shaped pins passes through the debris by a needle.
A fork-shaped scraper for removing from the pin
Vignetting comprising claim 1 or 2 cutting apparatus according. 4. The method according to claim 1, further comprising the step of: applying a negative pressure to the position where each of the needle-shaped pins respectively passes near the anvil cylinder.
A suction port for means for sucking air is provided.
3. The cutting device according to 1 or 2 . 5. The scraper according to claim 3, wherein said scraper
The cutting device according to claim 1 or 2 , wherein the cutting device is provided together with the suction port according to claim 4, which is adjacent to the ipa .