JPH07265347A - Manufacture of heat generating body - Google Patents

Abstract

PURPOSE:To facilitate the management of material and a process while obtaining a high quality product stably by a method wherein a composition of a heating body is mixed to form a dry mixture, which is dropped in a shape of a first film and water or an electrolyte is added to the dry mixture to form a composition of the heating body. CONSTITUTION:All components of a composition of a heating body but water or an electrolyte are mixed without adding water or the electrolyte water to form a dry mixture 4 and it is dropped from a feeder 3 in a specified range of a first film 1 being conveyed over the first film 1 comprising an air permeable film with a conveying device 2. Then, water or the electrolyte water is added with a water adding device 5 in a range where the dry mixture 4 is dropped to form a composition of the heating body. Moreover, a second film 7 is laminated on the first film 1 from the composition of the heating body with a post sealing device 6 to seal up both the films 1 and 7 over the entire circumference of the composition of the heating body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a heating element, and in particular, can manufacture a high quality product in a stable manner.
The present invention relates to a method for manufacturing a heating element in which raw materials can be easily managed and process flexibility can be improved.

[0002]

2. Description of the Related Art A heating element is one in which a heating element composition that generates heat in the presence of air is enclosed in a flat bag having at least one surface made of a breathable film. Of the heat-resistant film is fed from the roll, and a certain amount of the heating element composition is piled up at a certain interval while being fed by the conveying device, and the piled-up heating element composition is conveyed in a mutually conveying direction by a scraping rod, a doctor blade, a roller or the like. After being flattened within a predetermined range so as not to be continuous with the heating element composition added adjacent to, a film fed from another roller is covered on the breathable film from above the heating element composition, It is made by sealing two films around the heating element composition.

This heating element composition is formed, for example, by charging all components into a hopper having a discharge port at the bottom and two upper and lower partition plates for opening and closing the discharge port and stirring in the hopper. The appropriate amount is transferred to another container, and the heating element composition weighed from the container is dropped on the breathable film at regular intervals.

By the way, the heating element composition comprises metal powder such as iron powder, activated carbon which is an oxidation aid or oxidation promoter, electrolyte such as sodium chloride, water, and a water retention agent for preventing stickiness due to water. Is often used.

[0005]

When all the components of the heating element composition are put into the hopper and stirred, the reaction between the components of the heating element composition starts and the quality gradually deteriorates. Therefore, in order to make the quality of the product uniform, it is preferable to use up the raw materials put in the hopper in the shortest possible time.

Therefore, the mixture of the charged raw materials is continuously produced until it is discharged from the hopper. Usually, the raw materials are added once in the morning, and the heating element composition is used up continuously on the same day.

However, in reality, there is a difference in quality between the product at the beginning of manufacture and the product at the end of manufacture, and the reliability of the end user's product is impaired.

Further, when the reaction of the raw material (heating element composition) introduced into the hopper progresses, the fluidity is lost, and particularly in the vicinity of the inner surface of the hopper, the reaction is violent and the fluidity of the heating element composition becomes low. The exothermic composition in which the reaction has proceeded sticks and remains on the inner surface of the hopper.

In order to eliminate the exothermic composition which has undergone this reaction and to prevent the deterioration of the quality due to the mixing of the new raw material which has not deteriorated and the old raw material which has advanced deterioration,
Before the next raw material is charged, the inside of the hopper is cleaned.

In this case, normally, the hopper and the like are washed and dried over a period of 2 to 3 hours after the completion of the manufacturing process for one day, which lowers the operating rate of the heating device manufacturing apparatus. To do.

Further, in order to suppress the progress of the reaction of such a heating element composition, the hopper may be filled with nitrogen gas. In this case, the management of the raw material in the hopper becomes more troublesome. However, special equipment is required, resulting in high cost.

[0012] Of course, the mixture that has undergone the reaction cannot be reused and must be treated as an industrial waste, which is troublesome. On the other hand, using nitrogen gas increases the running cost.

As a result of repeated studies in consideration of the above circumstances, the present inventor has found that the solid components of the heating element composition hardly react with each other unless water or electrolyte water is added. Based on this, the present invention has been completed.

That is, the present invention has been completed in view of the above technical problems, and a heating element composition in which water or electrolyte water is not mixed is mixed to form a water-free mixture. After dropping a predetermined amount of the additive-free mixture into a predetermined range on the first film, and then adding a predetermined amount of water or electrolyte water to the water-free mixture to form a heating element composition, the stability is improved. Provided is a method for producing a heating element (hereinafter, abbreviated as the method of the present invention) in which a high-quality product is obtained, the raw materials and processes are easily controlled, and the raw material yield is improved. The purpose is to

[0015]

To achieve the above object, the method of the present invention comprises mixing a heating element composition containing no water or electrolyte water to form a water-free mixture. After dropping a predetermined amount of the addition mixture into a predetermined range on the first film, a predetermined amount of water or electrolyte water is added to the water-free mixture to form a heating element composition, and thereafter, a heating element composition. A second film is overlaid on top of the composition, then the first
It is characterized in that predetermined portions of the first and second films are sealed so that the heating element composition is enclosed by the second and second films.

With such a constitution, the heating element composition containing no water or electrolyte water does not start the reaction until water or electrolyte water is added at the time of packaging, so that there is no risk of deterioration in quality. Also, the solid component of the high-quality heating element composition that is uniform from the beginning to the end of the encapsulation between the first and second films and is not deteriorated by the reaction, that is, no water is added. The mixture can be added on top of the first film.

Further, since the solid components of the heating element composition do not start the reaction until water or electrolyte water just before packaging is added,
As long as it does not lose its fluidity in the equipment supplied with the water-free mixture at the time of packaging and does not change the composition of its components, it can be added one after another without cleaning the equipment such as the hopper. At that time, the production and packaging of the heating element can be interrupted or restarted.

Of course, it is not necessary to fill the hopper or the like with nitrogen gas in order to prevent the quality deterioration of the raw material.

Further, immediately before sealing the first and second films, water or electrolyte water is added to the water-free mixture to form a heating element composition, so that deterioration due to reaction occurs between the two films. It is possible to enclose a heating element composition that has hardly occurred.

By the way, in order to carry out the above-mentioned method of the present invention, a transporting device for transporting the first film, and a solid component of the heating element composition, which is disposed on the transporting route of the transporting device, is water or electrolyte water. A water-free mixture supply device that drops a water-free mixture obtained by mixing without addition to a predetermined range on the first film, and transports the water-free mixture on the transport path rather than the water-free mixture supply device. A water addition device that is arranged in advance and that adds water or electrolyte water to the water-free mixture that has been dropped onto the first film, and is further arranged at the conveyance destination than the water addition device on the conveyance route, and A second film is overlaid on the heat-generating composition composed of water-free mixture and water or electrolyte water dropped on the first film, and the heat-generating composition is enclosed by both the first and second films. Both the first and second It is preferably employed which comprises a sealing device for sealing a predetermined point Lum.

As a result, while the first film is being conveyed, the water-free mixture supplying device drops the water-free mixture into a predetermined range on the first film, and thereafter, the water-containing device removes the water-free mixture. Water or electrolyte water is added to the addition mixture to complete the heating element composition, and thereafter, encapsulation of the heating element composition between both the first and second films is continuous and in a large amount. Can be done.

The method of the present invention will be described in detail below. In the method of the present invention, first, in the heating element composition, components other than water or electrolyte water are mixed to obtain a water-free mixture. This water-free mixture may be prepared before it is dropped onto a predetermined range on the first film, and the mixing method of its components is not particularly limited.

Specifically, for example, each component other than water or electrolytic water may be separately and sequentially charged into the mixer to mix, or all components other than water or electrolytic water may be charged into the mixer. After that, they may be mixed.

The significance of components other than water or electrolytic water in the method of the present invention will be described.

That is, the heating element composition is composed of metal powder such as iron powder, activated carbon which is an oxidation aid or oxidation promoter, electrolyte such as sodium chloride, water, and a water retention agent for preventing stickiness due to water. It is used a lot.

In this heating element composition, water is added in order to prevent an oxidation reaction from being brought into contact with air, or to cause a slight amount of the oxidation reaction to cause no problem in the production of the heating element. No addition or no addition of electrolyte water in which an electrolyte is added to water may be added. Therefore, each component other than water or electrolyte water means the other component except water or the other component except water and the electrolyte in the heating element composition.

Further, according to the experimental results of the present inventor, each component of the heating element composition such as activated carbon adsorbs moisture in the air during storage, but each component adsorbs a saturated amount of moisture. It was confirmed that there was no problem in manufacturing the heating element.

In the method of the present invention, the saturated moisture content of each component means the amount of adsorbed moisture after exposing components other than iron powder, such as activated carbon, at a relative humidity of 100% and a temperature of 45 ° C. for 48 hours. The iron powder refers to the amount of adsorbed water after performing under the same conditions in a nitrogen gas atmosphere.

From the above, the water-free mixture is a generic term meaning that water is not intentionally added as a result.

As described above, a method of introducing the water-free mixture prepared in advance into the water-free mixture supply device can be considered.

Further, each component other than water or electrolytic water is separately and sequentially charged into the water-free mixture supply device to prepare a water-free mixture, or the water-free mixture supply device is supplied with water. Alternatively, all components other than electrolytic water may be added and then mixed to prepare a water-free mixture.

Which of these two methods is to be adopted is arbitrary, but in order to increase the operating rate of the water-free mixture supplying device and improve the productivity of the heating element, it is prepared in advance by a separate mixer. A method is preferred in which the water-free mixture is introduced into the water-free mixture feeder.

The above-mentioned water-free mixture supply device should essentially be constructed so as to be able to quantitatively add the water-free mixture to a predetermined range on the first film. For example, it has a discharge port at the bottom. Further, a hopper for containing the above water-free mixture and a quantitative supply device capable of quantitatively supplying the water-free mixture dropped from this outlet may be provided. However, when preparing the solid components of the heating element composition other than water or electrolyte water in the water-free mixture supply device, a stirring device for mixing the solid components of the heating element composition inside the hopper should be provided. Will be required.

When a large amount of moisture contained in the atmosphere flows into the hopper, the water-free mixture may react to cause deterioration of quality and adhesion to the inner surface of the hopper. Therefore, in order to eliminate such concerns, especially in the case of a water-free mixture supply device used in a humid environment, a dehumidifier or dryer may be provided in the hopper to keep the hopper dry. preferable.

In the method of the present invention, this water-free mixture is added to a predetermined range on the first film in a predetermined amount.

As a mode of this addition, a method of manually adding with a measuring cup and a method of adding with a water-free mixture supplying device can be considered. In the former, the measurement of the water-free mixture becomes considerably rough. In addition, there is a drawback that workability is low.

Therefore, in the method of the present invention, in order to enhance workability so as to fully meet the low cost of the heating element, and to improve the uniformity of the quality of the product, a method of adding with a water-free mixture supplying device. Is desirable.

When the water-free mixture is fixedly dropped onto the first film by using the water-free mixture supply device, the second film can be overlaid later to easily seal the first and second films. In order to do so, it is preferable to add them on average in the predetermined range on the first film as much as possible.

For this reason, it is possible to drop so as to rise up in one place within the above-mentioned predetermined range, but in this case, the water-free mixture was added within the predetermined range on the first film. After that, it becomes necessary to flatten the water-free mixture by using, for example, a scraping rod, a doctor blade, a roller, or the like.

Therefore, in this conventional method, one step and an apparatus for treating the step are increased, and when the water-free mixture is leveled, the water-free mixture easily protrudes from a predetermined range, and two sheets are added later. When the film is sealed, the water-free mixture protruding from the predetermined range may hinder the sealing, resulting in failure of complete sealing.

Therefore, in the method of the present invention, when a predetermined amount of the water-free mixture is dropped to a predetermined range on the first film, the first film is moved at a predetermined speed while adding no water. It is desirable to drop the mixture into the above-mentioned predetermined range from one side to the other side at equal intervals.

The above-mentioned water-free mixture supply device for carrying out this novel method is, for example, a hopper which has a discharge port at the bottom and which stores the water-free mixture, and a dropper from this discharge device. A feeder for quantitatively supplying the water-free mixture to be prepared and a distribution addition device for subdividing the water-free mixture supplied by the feeder into a predetermined amount and sequentially dropping the mixture on the first film.

In order for the distributive addition device to drop the water-free mixture supplied by the feeder into a predetermined amount and drop the mixture on the first film sequentially, the water-free mixture from the distributive addition device to the first film is added. The first film must be moved in the plane direction with respect to the dropping position of.

As this method, there are a method of moving the dispensing / adding apparatus, a method of moving the first film, and a method of moving the dispensing / adding apparatus and the first film in opposite directions to each other. A conceivable last method involves moving the distributive addition device and the first film in the same direction but at different speeds.

Among these methods, in the method including the movement of the distribution addition device, since the movement range of the distribution addition device is mechanically limited, in any case, the first film is moved intermittently, From the outside to the inside of the moving range of the dispensing and adding device
It is necessary to carry in the above film and carry it out from within the moving range of the distribution addition device after the addition of the water-free mixture. That is, a transport device for efficiently moving the first film is required.

On the other hand, in the method of moving the first film, the device for moving the distribution addition device is not required, the structure of the heating element manufacturing apparatus is simplified, and the heating element manufacturing apparatus is inexpensive. In addition to the production, the addition of the water-free mixture by the distributive addition device can be followed by the addition of water, the superposition of the second film and the sealing of both films, and the addition of the water-free mixture, It can be processed in parallel with three steps of adding water or electrolyte water, superimposing the second film, and sealing both films, which is most suitable for mass production.

Therefore, in the method of the present invention, the first film is transported by the transport device, and the first, second and third stages arranged in order from the transport source to the transport destination are set in this transport path, In the first stage, the water-free mixture is added, in the second stage, water or electrolyte water is added,
A method of sealing both the first and second films on the third stage is preferred, and in order to carry out this method,
The apparatus of the present invention is equipped with a transport device for transporting the first film.

The structure of the above-mentioned distribution addition device is not particularly limited as long as it is constituted so that the water-free mixture supplied by the feeder can be subdivided into a predetermined amount and sequentially dropped onto the first film. However, as a result of research, it has been found that very good results can be obtained by using the principle of the transfer type powdery or granular material adding device disclosed in, for example, Japanese Patent Application Laid-Open No. 4-341368.

Therefore, as the distribution addition device in the device of the present invention, a housing having a cylindrical rotor chamber whose lower part is opened and a rotor chamber are rotatably inscribed and accommodated in the rotor chamber, and an appropriate space is provided on the peripheral surface. And a rotor formed in a cylindrical shape having a concave portion formed by placing the above, and an upper portion of the rotor chamber is preferably connected to a discharge port of the feeder.

In this distribution addition device, the water-free mixture supplied in a fixed amount by the feeder is subdivided and stored in the concave portion of the rotor in the upper portion of the rotor chamber, and is conveyed to the lower portion of the rotor chamber by rotating the rotor. It is sequentially supplied by dropping from the open portion at the bottom of the rotor chamber. Since the first film is conveyed by the conveying device below the distribution addition device, a predetermined amount of the water-free mixture is sequentially dropped onto the first film below the distribution addition device. Thus, the water-free mixture will be dispersed evenly over the predetermined range of the first film. As a result, it is not necessary to level the water-free mixture again.

Incidentally, the concave portion of the rotor described in the transfer type powder and granular material adding device disclosed in Japanese Patent Application Laid-Open No. 4-341368 is a groove shape which is parallel to the generatrix of the rotor peripheral surface and is continuous over the entire length of the generatrix. However, the shape of the recess of the rotor of the device of the present invention is not limited to this.

For example, a groove which is inclined with respect to the generatrix of the rotor peripheral surface and is continuous over the entire length in the axial direction of the rotor, a groove which is parallel to the generatrix of the rotor peripheral surface and is intermittent in the axial direction of the rotor, and a rotor peripheral surface The grooves are arranged in a grid pattern that inclines with respect to the generatrix and are continuous over the entire length of the rotor in the axial direction, and are arranged at appropriate intervals in the circumferential and axial directions of the rotor. It can be. In short, the shape of the recess of the rotor can be arbitrarily selected depending on the material of the rotor and the processing method thereof.

Further, the region where the recess of the rotor is formed is not particularly limited, and the shape of the envelope of the recess corresponding to the shape of the addition range set on the first film, for example, circular, elliptical, It can be formed into any shape such as an oval shape, a polygon with rounded corners or more, a gourd shape, a serpentine shape, and a flower shape.

In the water-non-added mixture supply device used in the method of the present invention, it is conceivable to omit the feeder since the distribution addition device has a fixed amount supply function. However, in this case, when a large amount of the water-free mixture is dropped directly from the hopper into the rotor chamber of the distribution addition device, when the rotor is rotated at a high speed, the rotor is, so to speak, idle and It may not be possible to sufficiently fill the recess with the water-free mixture. Therefore, unless the rotational speed of the rotor is limited to a low value, the fixed amount supply function cannot be obtained, which is disadvantageous in increasing the production amount of the heating element per unit time.

Therefore, in the water-free mixture supply device preferably used in the method of the present invention, the water-free mixture is subdivided into small amounts by the feeder and is supplied to the distribution addition device in a fixed amount, and is fed to each recess of the rotor rotating at high speed. By dropping and supplying an appropriate amount of the water-free mixture, it is possible to reliably fill each recess with the water-free mixture.

In this case, depending on the rotation speed of the rotor,
Instead of the feeder, the water-free mixture may be subdivided by a screw or a piston and supplied in a fixed amount to the distribution addition device.

By the way, it is desirable that the above-mentioned distribution addition device is provided with a recovery device for returning the excess water-free mixture from the rotor chamber to the hopper.

Next, in the method of the present invention, a predetermined amount of water or electrolyte water is added to the water-free mixture added on the first film.

The addition of water or electrolyte water is preferably limited to a range not exceeding the addition range of the water-free mixture in order to complete the sealing of the film described later,
Further, in order to make the composition of the heating element composition uniform, it is preferable to add it uniformly over the entire addition range of the water-free mixture.

Therefore, in the method of the present invention, a predetermined amount of water or electrolyte water is subdivided into the water-free mixture that has fallen in a predetermined range on the first film from one side to the other at equal intervals. It is desirable to adopt the method of adding by adding.

As a method of adding this water or electrolyte water,
Since manual work is extremely disadvantageous in terms of accuracy and workability, the method of adding water or electrolytic water using a water adding device as described below is preferable in the method of the present invention.

That is, the water addition device preferably used in the method of the present invention is arranged on the conveyance path of the conveyance device at the destination of the water-free mixture supply device and added on the first film. As long as it is configured to quantitatively add water or electrolyte water to the water-free mixture,
This water addition device can add a predetermined amount of water or electrolyte water in small increments at equal intervals from one side to the other side in a predetermined range in which the water-free mixture is added as described above. It is desirable to configure it as follows.

That is, the water addition device has a housing having a water inlet for receiving water or electrolyte water from the outside, a rotor chamber communicating with the water inlet, and a water outlet communicating with the lower portion of the rotor chamber to the outside. It is desirable to use a rotor that is rotatably inscribed in the rotor chamber and has a cylindrical rotor having concave portions formed at appropriate intervals on the peripheral surface.

According to the water adding device thus constructed, the water or the electrolyte water introduced from the outside through the water inlet into the rotor chamber is subdivided into the concave portion on the upper side of the rotor, and the rotor is rotated. It is carried to the spout and discharged from the spout by its own weight and centrifugal force. Since the recesses are formed at appropriate intervals on the circumferential surface of the rotor, this water discharge is repeated every time the recesses reach the position of the water discharge port,
A predetermined amount of water or electrolyte water is added in a subdivided manner from one side to the other side of the water-free mixture being added to the first film being conveyed downward from the one side to the other side.

In the method of the present invention, water or electrolyte water may be added at high pressure, but if water or electrolyte water is added at high pressure, the water-free mixture may be blown out under pressure. , Water or electrolyte water is preferably added as gently as possible.

As described above, water or electrolyte water is added to the predetermined range in which the water-free mixture is added in equal intervals from one side to the other side of the mixture by its own weight and centrifugal force. Although it is possible to prevent the water-free mixture from being blown into water or electrolyte water,
When water or electrolyte water is discharged from the discharge port only by its own weight and centrifugal force, the discharge of water or electrolyte water is hindered by the surface tension of water or electrolyte water when the rotor is rotated at a high speed, and a predetermined amount of water is discharged. Alternatively, it was found that electrolytic water could not be added in some cases.

Therefore, in the method of the present invention, it is desirable that water or electrolyte water be forcibly discharged from the water addition device by using a pressurized fluid and added to the water-free mixture on the first film. Examples of the pressurized fluid include compressed air, compressed gas such as compressed nitrogen gas, and pressurized water.

In order to add water or electrolyte water as described above, in the water adding apparatus preferably used in the method of the present invention, the nozzle hole for injecting the pressurized fluid into the recess of the rotor facing the water discharge port in the housing. Is provided, and a pressurized fluid supply source is connected to the nozzle hole via a pressurized fluid circuit.

In the water adding device thus constructed, air is mixed with water or electrolyte water in the rotor facing the water discharge port by injecting the pressurized fluid from the nozzle hole into the recess of the rotor facing the water discharge port. At the same time, the pressurized fluid causes water or electrolyte water in the recess to be forcibly discharged from the recess and discharged from the water discharge port. When the water or the electrolytic water is discharged from the water outlet in this manner, the water or the electrolytic water surely falls into the water-free mixture.

In this case, the supply of the pressurized fluid is sufficient only during the period in which the concave portion of the rotor faces the water discharge port. Therefore, in order to prevent waste of the pressurized fluid, the pressurized fluid circuit is used to rotate the rotor. It is desirable to intervene the pressurized fluid circuit when the recess opposes the water outlet synchronously, and to interpose a valve that shuts off the pressurized fluid circuit when the peripheral surface of the rotor closes the water outlet.

In the method of the present invention, the water addition device is not limited to the above-mentioned structure, and for example, a plurality of water discharge ports and a plane in which these water discharge ports are opened at a constant interval larger than the diameter thereof. And a valve element that reciprocates in sliding contact with the plane of the nozzle, and a drive that causes the valve element to reciprocate with a stroke that is equal to or larger than the diameter of the water outlet and is equal to or less than half the opening pitch on the plane of the water outlet. A valve surface corresponding to the flat surface of the nozzle, valve holes opening in the valve surface corresponding to the water discharge ports, and communicating the valve holes with an external water / electrolyte water source. It is possible to adopt a configuration having a water channel that causes the flow.

In the water addition device thus constructed, each valve hole and the water discharge port can be connected to each other or can be cut off from each other by reciprocally driving the valve body by the drive device.
It is possible to add a predetermined amount of water or electrolyte water to the predetermined range where the water-free mixture passing therebelow is added, from one to the other in equal intervals. In this case, the water or the electrolytic water is discharged from the water outlet due to its own weight and the supply pressure of the water or the electrolytic water from the water / electrolyte water source. The supply pressure of water or electrolyte water must be limited to the extent that the added water-free mixture is not scattered.

In the method of the present invention, the method for sealing the first film and the second film may be, for example, adhesion using an adhesive, welding using a solvent, heating or fusion by heating and pressurizing. . Among these, a method of using an adhesive that has a simple structure and can configure the sealing device at a low cost, and that can easily control the sealing state, or a method of fusion bonding is preferable.

The method using an adhesive includes a method involving pressurization at the time of adhesion, a method involving heating at the time of adhesion, and a method including pressurization and heating. At least sealing is required for reliable sealing. A method of pressing both films against the transport surface at the time of wearing is preferable.

When the method using an adhesive is adopted,
It is necessary to apply the adhesive to one or both of both films. The method of applying this adhesive is to apply the adhesive in advance or to apply it immediately before sealing. You could think so.

Among these, in order to simplify the construction of the heating device manufacturing apparatus, it is desirable to apply an adhesive agent in advance. As a specific method of applying an adhesive agent in advance, when forming a film roll, in the case of a breathable film, over a portion excluding the above predetermined range on one side of the film, in the case of a non-breathable film It is conceivable to apply an adhesive to the entire surface of one side of the film.

In order to carry out the method involving heating, pressurizing, or pressurizing and heating at the time of sealing, the sealing device presses both the first and second films against the transport surface of the transport device. When,
It is necessary to provide one or both of heating means for heating both the first and second films.

As the pressurizing means, for example, one provided with a roller rolling on the conveying surface and an urging means for pressing the roller against the conveying surface with a predetermined pressure can be considered.

As the heating means, a resistance heating element or the like is used to heat both films by itself, and a high frequency generator is used to excite and vibrate the molecules in both films with electromagnetic waves of high frequency to heat both films. The thing is mentioned. Further, when the heating means and the pressure means are provided, the heating means can be provided inside the pressure device, for example, in a roller that is in rolling contact with the transport surface.

In the method of the present invention, the first film is transported by the transport device, and first, second, and third stages are set in this transport path in order from the transport source to the transport destination, and the first film is set. Add the water-free mixture on stage,
As described above, it is optimum to add water or electrolyte water in the second stage and seal the first and second films in the third stage.

In the method of the present invention, the method of supporting the first film conveyed by the conveying device on the conveying surface is not particularly limited. For example, a pressing device for pressing the first film on the conveying surface with an appropriate contact pressure is used. It is possible to provide it.
Examples of the pressing device include a plate-shaped or rod-shaped device, a pair of pulleys, a belt wound around these pulleys, and a large number of rollers.

A plate-shaped or rod-shaped pressing device is not preferable because it may scratch the surface of the first film and increases transport resistance. Further, in the pressing device provided with the belt, the pressing force becomes small at the intermediate portion of the pulley, and there is a possibility that the first film cannot be sufficiently pressed against the transport surface. Further, the pressing device provided with a large number of rollers has a large number of parts and is expensive, which is not preferable.

It is also conceivable to provide a chuck for sandwiching the first film on the belt or drum of the conveying device, but in this case, the structure of the belt or drum becomes very complicated, and a failure is likely to occur. Will be expensive.

Therefore, in the method of the present invention, as a method of supporting the first film on the transfer surface of the transfer device, a method of supporting the first film by vacuum suction on a belt or drum is desirable.

According to this method, the range in which the first film is supported on the transport surface can be set arbitrarily, and moreover, the first film can be reliably supported on the transport surface without scratching the first film. The first film can be easily peeled off from the range surface if it exceeds the range for supporting the first film on the transport surface. Moreover, the number of parts is small, and the configuration is simple, which is advantageous in reducing costs.

Therefore, in order to carry out this method, in the method of the present invention, a large number of vacuum suction ports are opened on the transfer surface of the transfer device, and the vacuum source is connected to the vacuum suction ports in a predetermined range of the transfer path. Is preferably provided.

In the method of the present invention, when the water-free mixture is added in the first stage, there is a risk that the added water-free mixture may fall out of a predetermined range and be added. Further, there is a possibility that a part of the water-free mixture may move out of a predetermined range due to vibration during transportation. Furthermore,
In the second stage, water or electrolyte water may be added outside the predetermined range, or water or electrolyte water added within the predetermined range may flow out of the predetermined range.

Since such a water-free mixture, water, or electrolyte water squeezing out of the predetermined range hinders the sealing of the two films, it is preferable to prevent it as completely as possible.

Therefore, in the method of the present invention, it is desirable to add the above water-free mixture after indenting a predetermined area of the first film downward.

By thus recessing a predetermined range to which the water-free mixture is added, the water-free mixture and water or electrolyte water added within this range are blocked at the edge of the recess. It can be prevented from squeezing out or flowing out to the outside thereof, and it is possible to prevent a sealing failure due to a water-free mixture, water, or electrolytic water squeezed out at the time of sealing later.

In order to carry out this method, in the method of the present invention, a concave portion is provided in a portion corresponding to the above-mentioned predetermined range of the conveying surface, and the concave portion is provided with a first portion on the conveying source side with respect to the water-free mixture supplying device. It is desirable to provide means for deforming the film following this recess.

As a method of deforming the first film following the recesses, a roll forming apparatus that presses the first film against the conveying surface on the conveying source side of the water-free mixture supplying apparatus is used. Method for plastically deforming film, first
A method in which the above predetermined range is recessed downward by vacuum-adsorbing the film on the transport surface and a method in which these methods are used in combination are conceivable, and any of these methods may be adopted.

In the method of the present invention, in order to carry out the method of deforming the first film by vacuum suction following the concave portion formed on the conveying surface, the region of the first film adsorbing to the conveying surface is not added with water. Since it can be expanded to the carrier side rather than the mixture supply device, it can be easily implemented,
Further, the manufacturing apparatus of the heating element for carrying out this method can be made inexpensive.

Therefore, in the method of the present invention, as a method of recessing the above predetermined range downward, a method of vacuum-adsorbing the first film on the conveying surface, or a combination of this method and a method using a roll forming apparatus is used. The method of doing is desirable.

In order to carry out this method, in the method of the present invention, a concave portion corresponding to a predetermined range to which the water-free mixture is added is formed on the above-mentioned transportation surface, and it is closer to the transportation source side than the water-free mixture feeding device. It is preferable to provide means for deforming the first film along the recess.

As means for deforming the first film following the recess on the transport source side of the water-free mixture supply device, the first film is transported on the transport source side of the water-free mixture supply device. And a roll forming device that presses the first film against the conveying surface on the conveying source side with respect to the water-free mixture supplying device.
It is conceivable that one having a (forming roller) and one having these two types installed side by side.

It is arbitrary which of these configurations is adopted. However, when the method and apparatus for fixing the first film to the conveying surface by vacuum suction is adopted, the first film is not used. Since the vacuum suction device fixed to the transfer surface can also be used as the vacuum suction device for forming the concave portion, the heating device manufacturing apparatus can be simplified and the cost can be reduced. It is desirable to configure. On the other hand, when this means is constituted by a roll forming device, the recess can be easily formed even in a film having a large film thickness, and therefore it is suitable when a film having a large film thickness is used as the first film.

In the method of the present invention, the water-free mixture sprinkled on the first film may be out of a predetermined range due to vibration during transportation. Although this squeeze-out can be fairly effectively prevented by forming a recess in the first film, it is further desired to surely prevent the spill-out of the water-free mixture from the predetermined range.

Therefore, in the method of the present invention, it is recommended that the water-free mixture be adsorbed on the transfer surface of the transfer device to prevent the water-free mixture from moving due to vibration. As the method for adsorbing the water-free mixture on the transport surface, the first film is composed of a breathable film, vacuum adsorption, magnetic adsorption, electrostatic adsorption, and A method of using two or more together is considered.

Further, in the method of the present invention, in order to carry out these methods, a vacuum suction means,
It is desirable to provide a magnetic adsorption means, an electrostatic adsorption means, or an adsorption means for adsorbing a water-free mixture composed of two or more of these means.

It is arbitrary which of these methods and devices is used. However, when the method and the device for fixing the first film to the transport surface by vacuum suction are adopted, the first film is Since the vacuum suction device fixed to the transfer surface can also be used as the vacuum suction device for forming the concave portion, the heating device manufacturing apparatus can be simplified and the cost can be reduced. It is desirable to configure

The magnetic adsorption method can be preferably used when a large amount of iron powder is contained in the water-free mixture. Specifically, for example, rubber is mixed with a magnetic material on the conveying surface. This can be easily realized by embedding a magnetic attraction body such as a rubber magnet or a magnetic sheet in which a magnetic material is supported by a synthetic resin.

Further, electrostatic adsorption is a method utilizing the property that a charged substance is adsorbed to an object that is oppositely charged, and it can be easily performed by applying a voltage between the water-free mixture supplying device and the conveying surface. realizable.

The water-free mixture adsorbed on the conveying surface by magnetic adsorption or electrostatic adsorption presses the first film against the conveying surface and fixes it by frictional force. The load of the fixing means can be reduced, and the means for fixing the first film to the transport surface can be downsized with a small capacity.

In the method of the present invention, the above-mentioned transporting device preferably used is a belt type device having a pair of pulleys arranged at appropriate intervals in the horizontal direction and a belt wound around both pulleys. It is considered that the drum type is provided with a horizontal axis drum having a cylindrical transport surface on the periphery.

Whether the belt type or the drum type is used is arbitrary, but in the case of the drum type, since two films are sealed on the cylindrical surface, the product bends more or less in an arc shape. On the other hand, in the belt type, two films can be sealed at the flat portion of the belt, which is advantageous because the appearance of the product can be enhanced.

In the drum type, from the first stage to the third stage
In order to make the conveying distance to the stage sufficiently long, it is necessary to increase the drum diameter in order to prevent slipping of the water-free mixture, whereas in the belt type it is easy to increase the distance between the pulleys. This is advantageous because the transport distance from the first stage to the third stage can be set to a sufficient length, and the layout of the water-free mixture supply device, the water addition device, and the sealing device can be facilitated. Therefore, these two
Of the two methods, it is desirable to use a belt type conveyor.

In the method of the present invention, the shapes of both the first and second films are not particularly limited, but in order to simplify the cutting process after sealing, the sheet-like shape previously cut into the size of each heating element. It is preferable to use a method of using a roll film and a method of using a roll film which has a width corresponding to the width or length of each heating element and which is rolled.

The method of using a sheet-shaped one which has been cut into the size of each heating element in advance is advantageous in that the cutting after sealing is not necessary, but a predetermined conveying surface is provided for each sheet. It is necessary to align and supply the supply position in two directions, that is, the transfer direction and the direction orthogonal to the transfer direction.
This is disadvantageous in that the structure of the two film supply devices for supplying the respective films becomes extremely complicated and the film supply devices become expensive.

In the method of using the roll film wound in a roll shape, since it is sufficient to supply the film in the direction orthogonal to the direction of conveyance to the position of supply to the conveying surface, the first and second conveying devices are provided. The two film supply devices for supplying the respective films control the position of the support device that rotatably supports the film roll wound with the roll film and the position in the direction orthogonal to the transport direction of the film fed from the film roll. In addition to providing a guide roller, the tact time for film supply can be ignored, and the film supply rate can be increased as long as the film does not tear. Is advantageous because it can be increased.

Further, according to this method, it is possible to select whether the produced heating elements are cut off one by one, or a plurality of heating elements are continuously connected through perforations and are cut off for every plural heating elements. It is also advantageous in that the degree of freedom in integrated packaging of products after manufacturing can be increased.

Therefore, it is desirable to use roll films as both the first and second films in the method of the present invention.

[0113]

According to the method of the present invention, since the solid components of the heating element composition do not start the reaction until water or electrolyte water is added at the time of packaging, there is no possibility of deterioration of quality by that time, and two sheets of From the beginning to the end of film encapsulation, a uniform quality heating element composition can be encapsulated between the two films.

A heating element composition other than water or electrolyte water,
That is, since the water-free mixture does not start the reaction until water or electrolyte water is added after being dropped to a predetermined range on the first film, a stirring device for preparing the water-free mixture,
As long as there is no risk of losing fluidity, agglomeration, or sticking to the wall surface of the hopper in a device that handles a water-free mixture, such as a water-free mixture supply device, these water-free mixtures are added. The devices for handling the mixture can be added one after the other without cleaning, and the production or packaging of the heating element can be interrupted or restarted at any time.

Further, according to the method of the present invention, while the first film is being conveyed, the water-free mixture is dropped to a predetermined range on the first film by the water-free mixture supply device, and further the water is added. After adding water or electrolyte water to the water-free mixture with an adding device to complete the heating element composition, another film is stacked, and the heating element composition is placed between the two films. The encapsulation method of the invention can be carried out continuously, and the dropping of the water-free mixture and the addition of water or electrolyte water to the previously dropped water-free mixture, and even earlier to the water-free mixture. It has the effect that the sealing of two films sandwiching the heating element composition produced by the addition of water or electrolytic water can be processed in parallel.

[0116]

EXAMPLES Examples of the method of the present invention will be specifically described below with reference to the accompanying drawings, but the method of the present invention and the method of the present invention are not limited to these examples.

As shown in the configuration diagram of FIG. 1, in the method for producing a heating element according to one embodiment of the present invention, water or electrolytic water is added to all components of the heating element composition other than water or electrolytic water. Without mixing, a water-free mixture 4 is formed, and while the first film 1 made of a breathable film is being conveyed by the conveying device 2, the water-free mixture supplying device is provided in a predetermined range on the first film 1. 3, the water-free mixture 4 is dropped, and thereafter, water or electrolytic water is added to a range where the water-free mixture 4 is dropped by a water addition device 5 to form a heating element composition. The second film 7 is laminated on the first film 1 from above the heating element composition by the sealing device 6 and both films 1 and 7 are sealed over the entire circumference of the heating element composition.

Mixing of the components of the heating element composition other than water or electrolyte water is carried out by dropping the respective solid components separated in a predetermined range on the first film 1 at a predetermined mixing ratio simultaneously or sequentially. By doing so, a method of mixing on the first film 1 and a method of mixing all components of the heating element composition other than water or electrolyte water prior to dropping onto the first film 1 are mentioned.

In the method of mixing on the first film 1,
In order to drop each solid component onto the first film 1 in a fixed amount, it is necessary to provide a quantitative addition device for each type of solid component, which makes the structure of the heating element manufacturing device too complicated. In addition, the composition of each component easily varies within one drop range,
It is disadvantageous in increasing the quality of the heating element composition formed by adding water or electrolyte water later.

Therefore, in this embodiment, one water-free mixture supplying device 3 is provided, and the water-free mixture 4 prepared by mixing all the components of the heating element composition other than water or electrolytic water before dropping is added to this water. A method of dropping a predetermined amount from the additive-free mixture supply device 3 into a predetermined range of the first film 1 is adopted.

Also, a water-free mixture 4 prepared in advance as a component
As a method of dropping the water-free mixture onto the first film 1, a water-free mixture 4 formed by charging each solid component into the water-free mixture supply device 3 and mixing them in the water-free mixture supply device 3 is formed.
And a method in which the water-free mixture 4 in which the components have been prepared in advance is charged into the water-free mixture supply device 3 and then dropped.

When the water-free mixture 4 is formed in the water-free mixture supply device 3, the water-free mixture supply device 3 is used.
It is necessary to provide a stirring device for mixing all components of the heating element composition other than water or electrolyte water therein. However, this stirring device can be used also as a stirring device, for example, when a feeder having a function of kneading and feeding an object to be supplied such as a screw feeder is provided in the water-free mixture supplying device 3.

In order to control the composition of the water-free mixture 4 more reliably, it is preferable to put the water-free mixture 4 prepared in advance into the water-free mixture supply device 3 and drop it as it is. In the present embodiment, attention is paid to the fact that a screw feeder 22 is provided in the water-free mixture supply device 3 as described later, and since special equipment for preparing the water-free mixture 4 is omitted, water-free mixture is not added. Predetermined amounts of the respective components are introduced into the additive mixture supplying device 3, and mixed in the water additive mixture supplying device 3 to form a water additive mixture 4, and the water additive mixture 4 is placed on the first film 1. A predetermined amount falls within a predetermined range.

By the way, the above-mentioned conveying device 2 has a pair of pulleys 8 and 9 arranged at right and left sides with an appropriate interval, and a belt 10 wound around these pulleys 8 and 9.
And a conveyor motor (not shown) drives the pulley 8 on the left side in the figure in the counterclockwise direction so that the belt 10 moves from the right side to the left side in the figure on the upper side between the pulleys 8 and 9. There is.

The surface of the upper half of the belt 10 constitutes a conveying surface, and the first surface is arranged on the conveying surface in order from right to left.
The stage, the second stage, and the third stage are set, the water-free mixture supply device 3 is arranged in the first stage, the water addition device 5 is arranged in the second stage, and the sealing device 6 is arranged in the third stage.

The belt 10 is shown in the plan view of FIG. 2 and FIG.
As shown in the sectional view of FIG. 1, a base cloth 11, a surface cloth 12, and a magnetic attraction means 13 made of a rubber magnet are provided. The surface cloth 12 has a region corresponding to the range in which the water-free mixture 4 drops, and the region corresponding to the extracted region is
Magnetic attracting means 1 on base fabric 11 thinner than outer fabric 12
By sticking 3, the concave portion 14 is formed in the portion corresponding to the range where the water-free mixture 4 is dropped. Further, the base cloth 11 and the magnetic attraction means 1 are provided in the recess 14.
A large number of vacuum suction ports 15 are formed so as to pass through 3 and 3 in the front-back direction.

The magnetic attraction means 13 may be provided over the entire width of the surface cloth 12, but in this embodiment, the magnetic attraction means 13 is located outside the concave portion 14 and the first film 1 is formed.
It is provided only in the recess 14 in order to prevent the water-free mixture 4 from being adsorbed and carried thereon.

The recesses 14 are formed in a large number at regular intervals in the conveying direction of the belt 10, but are arranged in a plurality of rows in the width direction of the belt 10 orthogonal to the conveying direction, and
It is possible to simultaneously manufacture a plurality of rows of heating elements by forming a large number of belts in each row at regular intervals in the transport direction of the belt 10.

However, as shown in FIG. 4, when the water-free mixture 4 is supplied to the distribution addition device 21 by the screw feeder 20 of the water-free mixture supply device 3, the feeding direction of the screw feeder 20, that is, the belt 10 is used. In the width direction of, the drop amount and the composition of the components are likely to be non-uniform. Therefore,
When the number of rows in the width direction increases, the water-free mixture 4 in the width direction
It must be kept in mind that errors may occur in the falling amount and the composition of the components, and in order to stabilize the quality of the product, it is possible to drop the water-free mixture 4 evenly in each row. It is necessary to configure the feeding device.

In this embodiment, the recess 14 is formed in the belt 1.
0 is arranged side by side in a row at a constant interval in the transport direction of 0. As will be described later, in each of the recesses 14, the drop amount and the component mixture can be dropped in the transport direction on the average, so that one row is used. This is because, if there is, the amount of drop of the water-free mixture 4 in the width direction of the belt 10 and the error in component mixing can be ignored.

Below the portion of the belt 10 located between the two pulleys 8 and 9 on the upper side, the water-free mixture supplying device 3 is provided.
The vacuum chamber 16 is arranged so as to contact the lower surface of the belt 10 in the range from the portion on the transport source side (the right side in the drawing) to the lower side of the water addition device 5. The vacuum chamber 16 is formed in a box shape having an open upper surface, and the inside thereof communicates with a vacuum source (not shown).

The first film 1 is unwound from the film roll 17, guided by the guide roller 18 on the belt 10 and to the right side of the pulley 9, and along the upper right portion of the pulley 9, both pulleys 8, 9 to the upper part of the belt 10 located on the upper side, the vacuum chamber 16
Vacuum suction is performed on the upper surface of the upper portion of the belt 10.

As a result, the first film 1 is the belt 1
0 is fixed to the upper surface, that is, the conveying surface, and the portion corresponding to the range where the water-free mixture 4 of the first film 1 is dropped is recessed downward.

Thereafter, the first film 1 is carried into the first stage, and the water-free mixture supplying device 3 is placed in the recess 14.
A predetermined amount of the water-free mixture 4 is dropped from there.

The water-free mixture supply device 3 has a hopper 19 which has a discharge port at the bottom and stores the water-free mixture 4, and a screw feeder for quantitatively supplying the water-free mixture 4 falling from this discharge port. 20 and a distribution addition device 21 for subdividing the water-free mixture 4 supplied by the screw feeder 20 into a predetermined amount and sequentially dropping the mixture on the first film 1.

As shown in the vertical sectional front view of FIG. 4, this distribution addition device 21 has a cylindrical rotor chamber 2 whose lower portion is opened.
2 and a rotor 25 which is rotatably inscribed in the rotor chamber 22 and is housed in the rotor chamber 22 and which has a cylindrical shape and has concave portions 24 arranged at appropriate intervals on the peripheral surface.

The screw feeder 20 includes the belt 1
The rotor chamber 22 in the housing 23 whose axis is oriented in the width direction of 0, the rotor chamber 22 above the rotor 25, and the rotor 25 are arranged in parallel with each other.
The water-free mixture 4 falling from the rotor chamber 22 into the rotor chamber 22 is filled into the recesses 24 in the upper peripheral portion of the rotor 25 in small portions.
When the rotor 25 is rotated in the direction of arrow A, for example,
The water-free mixture 4 subdivided into each recess 24 is carried to the lower portion of the rotor chamber 22 and drops downward from the open portion of the rotor chamber 22.

The range in which the water-free mixture 4 is dropped is the conveying speed of the first film 1, the peripheral speed of the rotor 25,
It is determined by the region of the peripheral surface of the rotor 25 where the recess 24 is arranged. Here, the transport speed of the first film 1 and
Since the peripheral speed of the rotor 25 is made equal, it is substantially determined by the region of the peripheral surface of the rotor 25 in which the recess 24 is arranged.

The shape of the region in which the recess 24 of the rotor 25 is arranged is not particularly limited, and is circular, oval, oval, polygon with rounded corners or more, polygon, bow star,
The shape can be any shape such as a gourd shape and a donut shape, a doll, and a character shape.

In this embodiment, the region where the recessed portion 24 of the rotor 25 is arranged is the same as that of the heating element which is generally commercially available and corresponding to the recessed portion 14 formed in the belt 10 of the conveying device 2. Is formed in a rectangular shape.

The shape of the recess 24 of the rotor 25 is not particularly limited, and the groove is continuous over the entire axial length of the rotor 25, the groove is intermittent over the entire axial length of the rotor 25, and the opening surface is circular. The recesses 24 can be formed as dents of any shape such as an elliptical shape, an oval shape, or a polygonal shape. In this embodiment, however, since the rotor 25 is made of a metal having high wear resistance, each recess 24 is machined. The rotor 25 is formed of continuous grooves over the entire length of the rotor 25 in the axial direction. Further, the cross-sectional shape of the recess 24 is not particularly limited, but here, in order to facilitate filling of the water-free mixture 4 into the recess 24 and discharge of the water-free mixture 4 from the recess 24, an anti-circular shape is used. Is forming.

The first film 1 is conveyed below the rotor chamber 22 and the rotor 25 at the same speed as the peripheral speed of the rotor 25, and the water-free mixture 4 which is subdivided in order from each recess 24 is dropped and supplied. As a result, an equal amount of the water-free mixture 4 is subdivided in a predetermined range on the first film 1 from one end side to the other end side in the transport direction at equal intervals.
Are dropped in order.

In this manner, the predetermined amount of the water-free mixture 4 is subdivided and sequentially dropped from one end side to the other end side in the predetermined range of the conveying direction, so that the average amount in the predetermined direction is obtained in the conveying direction. Then, the water-free mixture 4 can be dropped,
After dropping, it becomes unnecessary to smooth the water-free mixture 4 by using, for example, a scraping rod.

As described above, since the area where the water-free mixture 4 on the first film 1 is dropped is recessed downward, when the water-free mixture 4 that has been dropped and supplied falls or after that. It becomes difficult for the water-free mixture 4 to protrude out of this range during transportation, and the incomplete sealing is prevented by the water-free mixture 4 which protrudes out of this range during the subsequent sealing.

Further, since the magnetic attraction means 13 is embedded in the concave portion 14 of the belt 10, the water-free mixture 4 containing iron powder as a main component is magnetically attracted to the belt 10 and falls into the predetermined range. It becomes more difficult for the additive-free mixture 4 to squeeze out of the range, and incomplete sealing is reliably prevented by the water-free mixture 4 squeezing out of this range during the subsequent sealing.

Although the water-free mixture 4 is continuously supplied from the screw feeder 20 to the above-mentioned distribution addition device 21, the water-added mixture 4 of the rotor 25 is sealed at the sealing portion between the ranges. Since the concave portion 24 is not formed in the corresponding portion, when this portion comes to the upper side of the rotor chamber 22, an excess of the water-free mixture 4 occurs. Since this excess water-free mixture 4 does not contain water, there is no risk of its components reacting and deteriorating, and therefore it can be recovered and reused.

Therefore, in this embodiment, the distribution addition device 2
1 is provided with a recovery device 26 for recovering the excess water-free mixture 4 from the upper side of the rotor chamber 22. The recovery device 26 includes a recovery path 28 that opens to a supply path 27 from the screw feeder 20 to the rotor chamber 22 near the rotor chamber 22.
And a ventilation path 29 facing the opening and opening to the supply path 27. An injector (not shown), for example, is connected to the recovery passage 28, and is configured to suck and remove the water-free mixture 4 in the supply passage 27.

The water-free mixture 4 recovered by the recovery device 26 may be recovered in a special recovery container and transferred from the recovery container to the hopper 19, but in this embodiment, it is troublesome to transfer it. In order to save time and time, the end of the recovery path 28 is directly communicated with the hopper, and the supply path 27 is directly returned to the hopper 19.

Further, in order to drop the water-free mixture 4 into a predetermined range on the first film 1 being conveyed at a predetermined speed, the concave portions 24 are dispersed evenly on the peripheral surface of the rotor 25. Together with the rotor 25 and the screw feeder 2
The rotor 25 and the screw feeder 20 are stopped only while the sealing portion between the ranges where the water-free mixture 4 falls to 0 passes below the water-free mixture supply device 3 to prevent the water-free mixture 4 from dropping. So to speak,
A method of controlling the operations of the rotor 25 and the screw feeder 20 in a timetable may be considered.

However, in this method, there is a control delay at the time of starting and stopping the rotor 25 and the screw feeder 20, so that there is a great limitation in shortening the takt time of the process, and the production amount is increased. In addition to being disadvantageous, it is also disadvantageous in terms of averaging the drop of the water-free mixture 4.

Therefore, in this embodiment, a region where the recess 24 is not formed is provided in a part of the rotor 25, and the screw feeder 20 and the rotor 25 are continuously operated while being synchronized with the conveying speed of the first film 1. A control method of aligning the position of the concave portion of 25 with the spraying region of the water-free mixture 4 on the first film 1 is adopted.

In this control method, since the control delay at the time of starting and stopping the rotor 25 and the screw feeder 20 can be ignored, the takt time of the process is set to the conveying speed of the first film 1, the rotating speed of the rotor 25 and the screw feeder. It can be shortened simply by increasing the screw rotation speed of 20.

For example, in the conventional method in which the water-free mixture 4 is placed on the first film 1 using a measuring cup,
While the production amount was about 20 to 50 pieces per minute, according to the manufacturing method and the apparatus for this heating element, the conveying speed of the first film 1 is set to about 53 to 120 m / min, and About 400 to 900 heating elements can be produced per minute.

When the dropping of the water-free mixture 4 is finished,
The film 1 is sent to the second stage, and water or electrolyte water is added to the range where the water-free mixture 4 is dropped by the water addition device 5.

The water addition device 5 is arranged on the destination side of the water-free mixture supply device 3, and the distance between them is as small as possible in order to reduce the scattering of the water-free mixture 4 around during the transportation. Although it is preferable to narrow the length, in this embodiment, it is about twice the length of the heating element in the transport direction. However, it may be shorter than this or longer than this.

In this way, the distance between the water-free mixture supply device 3 and the water addition device 5 is set to about 2 of the length of the heating element in the transport direction.
In the case of doubling, the drop range of one water-free mixture 4 is after the drop of the water-free mixture 4 in that range is completed, and then the water-free mixture is added to the following two water-free mixture 4 drop ranges. 4 can be dropped. Then, after the falling range of one water-free mixture 4 is sent to the water addition device 5,
It is possible to drop the water-free mixture 4 into the falling area three times after the addition of water or electrolyte water to the falling area.

By sequentially treating the dropping of the water-free mixture 4 and the addition of water or electrolyte water in this manner, the mass production effect by the flow work can be enhanced, and the product cost can be reduced by mass production. Can be achieved.

The water addition device 5 preferably adds water or electrolyte water to the water-free mixture 4 dropped in a predetermined range as evenly as possible. Therefore, the production of the heating element according to this embodiment is performed. In the method, a method is employed in which water or electrolyte water is subdivided into the area where the water-free mixture 4 has dropped from one side toward the other at equal intervals.

Further, in order to carry out this method, the water addition device 5 in the heating element manufacturing apparatus according to this embodiment is, as shown in the vertical sectional front view of FIG. 5 and the vertical sectional side view of FIG. A water inlet 30 for receiving water, a cylindrical rotor chamber 31 communicating with the water inlet 30, and a rotor chamber 3
1, a housing 33 having a water discharge port 32 communicating with the outside below, and a rotor 34 rotatably inscribed and housed in the rotor chamber 31. This rotor 34
Like the rotor 25 of the water-free mixture supply device 3, is formed in a cylindrical shape having a large number of concave portions 35 arranged at appropriate intervals on the circumferential surface.

Further, as shown in the enlarged sectional views of FIGS. 5 to 7, the spout 3 is provided in the lower wall of the housing 33.
A large number of nozzle holes 36 for injecting compressed air and a passage 37 communicating with each nozzle hole 36 are formed in the concave portion 35 of the rotor 34 facing the second nozzle hole 36.
A compressed air supply source is connected to the compressed air circuit via a compressed air circuit, and the compressed air circuit is provided with a valve that opens and closes the compressed air circuit in synchronization with the rotation of the rotor 34.

This valve has a structure in which the concave portion 35 passes through the water discharge port 32 of the rotor 34 corresponding to the portion of the rotor 34 continuous at a constant short interval, that is, the range in which the water-free mixture 4 is dropped. The valve is opened, the compressed air circuit is communicated, and compressed air is supplied to each nozzle hole 36.

Further, this valve is provided in the portion 38 of the rotor 34 in which the interval between the recesses 35 is larger than the above-mentioned constant interval, that is, in the sealing part between the areas where the adjoining water-free mixture 4 is falling. During a period in which a corresponding portion of the rotor 34 passes through the water discharge port 32, the valve is closed to shut off the compressed air circuit.

In this water addition device 5, water or electrolyte water introduced from the outside into the rotor chamber 31 through the water inlet 30 is subdivided into a predetermined amount in each recess 35, and the rotor 34 is rotated. Are carried to the lower part of the rotor chamber 31 and discharged from the water discharge port to below the housing 33.

Each time each concave portion 35 of the rotor 34 comes to a position facing the water discharge port 32, a nozzle hole 36 is formed in the concave portion 35.
Compressed air is blown from the air, whereby air is mixed with water or electrolyte water, and the weight of water or electrolyte water is reduced.
The centrifugal force applied to the water or the electrolytic water by the rotation of the rotor 34 and the pressure of the compressed air cause the water or the electrolytic water in the recess 35 to be discharged below the housing 33 through the water discharge port 32.

By transporting the first film 1 and the water-free mixture 4 dropped in a predetermined range on the first film 1 below the discharged air 32 at the same speed as the peripheral speed of the rotor 34, the water-free mixture is added. Water or electrolyte water is subdivided into a predetermined amount from one direction of the mixture 4 to the other in the falling range of the mixture 4 at equal intervals and added.

A predetermined amount of water or electrolyte water is added to the falling range of the water-free mixture 4 from one direction of the water-free mixture to the other at equal intervals, whereby the water-free mixture is added. Water or electrolyte water is added to 4 on average, and a homogeneous heating element composition is formed over each water-free mixture 4 and the addition range of water or electrolyte water.

By adding water or electrolyte water, the water-free mixture 4 is prevented from being scattered by the water pressure.
Or, the exothermic composition is prevented from protruding. This prevents the non-water-added mixture 4 or the heating element composition protruding from the predetermined range during the subsequent sealing from interfering with the sealing.

The first film 1 on which the heating element composition thus formed is placed in a predetermined range is further sent to the sealing device 6 and the second film unrolled from another film roll 39. 7 is overlaid on the heating element composition, and at the same time, the portions of the first and second films 1, 7 surrounding the heating element composition are sealed to each other by the roller head 40 of the sealing device 6.

Examples of the method for sealing both films 1 and 7 include a method of adhering with an adhesive, a method of welding with a solvent, a method of heating, or a method of fusing by pressing simultaneously with heating. To be In this embodiment, of these methods, a method of using an adhesive, which has a simple structure and can configure a sealing device at low cost, and whose sealing state is easy to control, is adopted.

Among the methods of adhering with an adhesive, there are a method of pressing both films 1 and 7 against the conveying surface at the time of adhering, and a method of pressing both films 1 and 7 against the conveying surface at the time of adhering. A method of heating at the same time as pressing is also included, but it is preferable to press at least both films 1 and 7 in order to ensure sealing. In this embodiment, since an inexpensive hot-melt adhesive is used, both the films 1 and 7 are heated at the same time as this pressurization.

That is, the roller head 40 is pressed against the conveying surface with an appropriate contact pressure by an urging device (not shown),
Further, in the roller head 40, for example, a flash lamp, a heating element such as a resistance heating element, or both films 1, 7
There is provided a high frequency generator for generating heat by high frequency electromagnetic induction.

When the adhesive is used as described above,
A method in which an adhesive is applied by printing to a portion other than the predetermined range when forming one or both of the two film rolls 17, 39, both films 1, 7 fed from the film rolls 17, 39 One or both of them may be applied by a roll coater or the like before they arrive at the sealing device 6.

In this embodiment, in order to simplify the structure of the entire apparatus, an adhesive is used to form one of the film rolls 17 and 39 on one side of the films 1 and 7 forming the film rolls 17 and 39. The method of applying the adhesive by printing is used. When the adhesive is applied to the breathable first film 1, the adhesive is applied only to a portion other than the predetermined range in order to ensure the breathability in the above-mentioned predetermined range, and the non-air-permeable property is maintained. Sex second film 7
In this case, the adhesive may be applied only to the portion excluding the above predetermined range, but in order to facilitate the applying work, the adhesive is applied over the entire surface of one side.

The two films 1 and 7 as described above are fed between the belt 10 and the roller head 40 so that the surface coated with the adhesive faces the other film, and the roller head 40 conveys the surface. Both films 1 and 7 are heated by the heating element built in the roller head 40 while being pressed by, or induced by high frequency generated by a high frequency generator built in the roller head 40 Fever. As a result, the adhesive melts, and the two films 1 and 7 that are pressed against each other are bonded.

After sealing both films 1 and 7, both the first and second films 1 and 7 and the heating element composition enclosed between them were moved along the left pulley 8 by the belt 10. It is transported to the side and hangs downward from there. Then, perforations are formed in the sealing portion between the ranges in which the respective heating element compositions are enclosed, and a band body in which a plurality of heating elements are successively connected through the perforations is obtained, or each heating element composition is formed. It is possible to obtain a heating element that is cut off one by one by cutting each sealed portion between the ranges in which is sealed.

In another embodiment of the present invention, another water adding device different from the water adding device 5 is used, and as shown in the vertical sectional side view of FIG. 8 and the vertical sectional front view of FIG. Reference numeral 41 designates a nozzle 44 having a plurality of water outlets 42, and a flat surface 43 in which the water outlets 42 are arranged in a row and arranged at regular intervals larger than their diameters. A nozzle 44 is slidably contacted with the flat surface 43 of the nozzle 44. The valve body 45 that reciprocates in the direction in which the nozzle holes 42 are arranged, the valve body 45 is larger than the diameter of the water discharge port 42, and the opening pitch of the water discharge port 42 on the plane 43 is 2
And a drive device 46 that reciprocates with a stroke of one-half.

The drive device 46 is arranged on the vertical axis, and is fixed to a motor 48 supported by a frame 47 supporting the nozzle 44 in the vertical direction, and an output shaft 49 protruding below the motor 48. The eccentric cam 50 and the connecting member 51 are provided. The base end of the connecting member 51 is externally fitted to the eccentric cam 50, and the tip of the connecting member 51 is connected to the valve body 45 by a pin 52. Accordingly, when the motor 48 is rotated, the base end portion of the connecting member 51 moves eccentrically around the output shaft 49, and the tip end portion thereof causes the valve element 45 to reciprocate in the direction in which the nozzle holes 42 are arranged.

This valve body 45 has a flat surface 43 of the nozzle 44.
A valve surface 53 corresponding to each of the water discharge ports 42, each valve hole 54 opening to the valve surface 52 corresponding to each water discharge port 42, and a water / electrolyte water channel 55 for communicating each valve hole 54 with a water / electrolyte water source (not shown). Is formed.

Accordingly, when the drive device 46 causes the valve body 45 to reciprocate in the direction in which the water discharge ports 42 are arranged along the plane 43 of the nozzle 44 at a half of the opening pitch of the water discharge ports 42, the valve holes 53 and the discharge holes are discharged. The state in which the water ports 42 communicate with each other and the state in which the valve holes 54 and the water outlet 42 are blocked by the flat surface 43 and the valve surface 53, respectively, so that the valve holes 54 and the water outlet 42 are blocked from each other are alternately repeated. As a result, the discharge of water or electrolyte water from the water outlet 42 due to its own weight and supply pressure is intermittent.

Therefore, the lower side of the water adding device 42 is
The valve body 45 is reciprocally driven only during the period when the water-free mixture 4 dropped on the film 1 passes, and the valve hole 54 and the water outlet 42 are cut off from each other during the period when the water-free mixture 4 does not pass. By stopping the valve element 45 at a predetermined time, it is possible to add a predetermined amount of water or electrolyte water to the range in which the water-free mixture 4 is falling, from one side to the other at equal intervals. .

In this embodiment, if necessary, in order to prevent the valve surface 53 of the valve element 45 from rising from the flat surface 43 and preventing water from leaking between the both surfaces, the valve element 45 is kept at a predetermined pressure. A guide device 56 for guiding the reciprocating movement of the valve element 45 while pressing the nozzle 44 is provided.

The guide device 56, as shown in FIG.
Fixed frame 58 supported on the frame body 47 through the column 57
As shown in FIG. 8, a movable frame 60 supported by the fixed frame 58 so as to be able to move up and down through a guide post 59, and a lower portion of the movable frame 60 which is rotatably supported and which has an upper surface of the valve body 45. A guide roller 61 that rolls and a bias spring 62 that presses the guide roller 61 against the valve body 45 via the movable frame 60 are provided.

Since the other construction, operation and effect of this embodiment are the same as those of the above-mentioned one embodiment, their description is omitted to avoid duplication.

In a further embodiment of the method of the present invention, as shown in the configuration diagram of FIG. 10, a conveying device 63 having a horizontal shaft drum 64 having a cylindrical conveying surface is used. . On the outer peripheral surface of the drum 64, concave portions 65 are formed in portions corresponding to the range where the water-free mixture 4 falls, and the magnetic attraction means formed of a rubber magnet having a thickness smaller than the depth of the concave portions 65 at the bottom of each concave portion 65. 66 is attached.

Further, each magnetic attraction means 66 has a drum 64
A plurality of vacuum suction holes are formed at appropriate intervals in the circumferential direction and the axial direction, and a vacuum circuit is formed in the drum 64 so that each vacuum suction hole communicates with a vacuum source.

The first stage in which the water-free mixture supply device 3 is arranged is set above the central axis of the drum 64, and the second stage in which the water addition device 5 is arranged and the sealing device 6 are arranged. The three stages are sequentially set on the diagonally upper left side of the drum 64 in the figure.

[0187] Between the guide roller 18 for guiding the first film 1 made of a breathable film fed from the film roll 17 to the peripheral surface of the drum 64 and the water-free mixture supplying device 3, the conveying surface, that is, First on the peripheral surface of the drum 64
There is provided a forming roller 67 which presses the film 1 of No. 1 and follows the recessed portion 65 corresponding to the falling range of the water-free mixture 4 to recess the first film 1 toward the center of the drum 64.

The portion of the first film 1 corresponding to the falling range of the water-free mixture is formed by the forming action of the forming roller 67 and the vacuum suction, and the water-free mixture supply device 3 is provided.
Before being fed into the drum 64, it is recessed toward the center of the drum 64, that is, downward in the first stage.

In order to prevent the first film 1 from floating from the conveying surface, the guide roller 18 and another guide roller 68 provided between the forming roller 67 and the water-free mixture supplying device 3 are separated from each other. Film roller 3
The second film 7 fed from 9 is superposed on the first film 1 and is gently pressed against the surface of the drum 64 by another guide roller 69.

The detailed description of the other constructions, actions and effects of the present invention is the same as that of the above-mentioned one embodiment, so that it is omitted to avoid duplication.

[0191]

As described above, the method of the present invention is
All the components of the heating element composition other than water or electrolyte water are mixed to form a water-free mixture, and a predetermined amount of the water-free mixture is dropped into a predetermined range on the first film. When water or electrolyte water is added to the solid component of the heating element composition at the time of packaging, that is, because a predetermined amount of water or electrolyte water is added to the addition mixture and another film is stacked and sealed. Water is not added until just before being enclosed between the two films, and a reaction with deterioration of the quality does not occur.

As a result, the water-free mixture introduced into the water-free mixture supply device, that is, the heating element composition other than water or electrolytic water, can be dropped from the start to the end without deterioration and can be deteriorated. It is possible to stably enclose a high-quality heating element composition that does not exist between two films.

In addition, according to the method of the present invention, since the water-free mixture introduced into the water-free mixture supply device, that is, the heating element composition other than water or electrolytic water is not deteriorated by the reaction, no water-free mixture is obtained. There is no possibility that the added mixture loses fluidity and adheres to the water-free mixture supplying device, and the water-free mixture can be left in the water-free mixture supplying device.

Further, since the water-free mixture introduced into the water-free mixture supply device is not deteriorated by the reaction, freely add the water-free mixture having the same components to the water-free mixture supply device. You can

As a result, it is possible to omit the cleaning of the water-free mixture supply device and the filling of the water-free mixture supply device with nitrogen gas, thereby facilitating the management of the raw materials and generating heat between the two films. It is possible to freely set the start time and the end time of the encapsulation step of encapsulating the body composition, and increase the flexibility of the manufacturing process.

Further, since the water-free mixture can be left in the water-free mixture supply device, the raw material can be used without being discarded, the yield of the raw material can be increased, and the waste material is troublesome. The processing can be omitted, and the manufacturing cost can be significantly reduced.

Further, since there is no possibility that the water-free mixture loses its fluidity and adheres to the inside of the water-free mixture supply device, it is not necessary to wash the water-free mixture supply device and the operation efficiency can be improved. .

In the method of the present invention, in particular, when a predetermined amount of the water-free mixture is dropped into one of the predetermined areas on the first film from one side to the other at equal intervals, the above-mentioned predetermined amount is dropped. Since the water-free mixture is dropped on average in the range of, it is possible to omit the step of smoothing the water-free mixture after dropping with, for example, a cutting rod, a doctor blade, etc. With the improved efficiency, it is possible to prevent the water-free mixture from squeezing out of the predetermined range along with smoothing the water-free mixture, and by the water-free mixture squeezed out of the predetermined range in the subsequent sealing step. It is prevented that the sealing state is deteriorated.

In the method of the present invention, when water or electrolyte water is added to the above predetermined range in equal intervals from one to the other, the water or the electrolyte water is added within the above predetermined range. Since it is added on average to the water-free mixture that is added to the heating element composition, a heating element composition in one heating element can be formed homogeneously, and a high quality heating element composition can be formed between two films. Can be enclosed in.

Further, in the method of the present invention, particularly when the above-mentioned water or electrolyte water is added, the water-free mixture is sprinkled by water pressure upon addition of water or electrolyte water, or by dropping in water / electrolyte water droplets. Prevents the water-free mixture from splashing out of the specified range and prevents the water-free mixture protruding from the specified range from deteriorating the sealing state in the subsequent sealing step. it can.

Further, in the method of the present invention, when the water-free mixture is dropped after the predetermined area of the first film is recessed downward, the sprinkled water-free mixture is mixed with the water in the predetermined area. Out of the above range, or the added water / electrolyte water is reliably prevented from flowing out of the above predetermined range, and the water-free mixture or the above-mentioned water-free mixture that has overflowed from the above predetermined range in the subsequent sealing step. It is possible to reliably prevent the sealing state from being deteriorated by water or electrolyte water that has flowed out of the predetermined range.

In the method of the present invention, the first film is transported by the transport device, and the first, second and third stages are arranged in this transport path in order from the transport source to the transport destination. On the stage, drop the above water-free mixture,
When water or electrolyte water is added in the second stage and both the first and second films are sealed in the third stage, no water is added while transporting both the first and second films. Dropping of the mixture, addition of water or electrolyte water, and sealing can be performed sequentially and in parallel, mass production can be performed by flow work, and the cost of the product can be reduced by this mass production.

In this case, a concave portion corresponding to the predetermined range is formed on the conveying surface of the conveying device, and the first film is fixed to the conveying surface by vacuum suction of the first film on the surface. At the same time, it is possible to adopt a method of recessing the predetermined range downward.

Further, the first film can be fixed on the transfer surface without damaging it by one vacuum suction device, and
It is possible to prevent the water-free mixture from running out of a predetermined range by forming a recess in the first film, and to prevent water or electrolyte water from flowing out of a predetermined range. It is possible to prevent the non-additive mixture, water, or electrolytic water from interfering with the sealing of the two films.

As a means for deforming the first film following the recess on the transport source side with respect to the water-free mixture supply device, the first film on the transport source side with respect to the water-free mixture supply device is used. It is possible to provide a forming roller that presses against the conveying surface to form, and in this case, the first film having a relatively large film thickness can be deformed following the recess.

Then, the structure of the heating element manufacturing apparatus for carrying out the method of the present invention can be simplified and the heating element manufacturing apparatus can be made inexpensive.

In addition, in the method of the present invention, especially when the water-free mixture is adsorbed on the transfer surface of the above-mentioned transfer device, the water-free mixture dropped in a predetermined range is shaken on the first film. It is possible to prevent the water-free mixture from spilling out of the range, and it is possible to prevent the sealing state from being lowered by the water-free mixture squeezing out of the predetermined range in the subsequent sealing step. It can be surely prevented.

In this case, when the first film is composed of a breathable film and the water-free mixture is vacuum-adsorbed on the transfer surface of the transfer device, the transfer surface of the first film is fixed by suction. Since adsorption and fixation of the water-free mixture on the transport surface can be performed by one vacuum adsorption device, the structure of the heating element manufacturing apparatus can be simplified and the cost can be reduced.

Further, in this case, when the water-free mixture is magnetically attracted or electrostatically attracted to the transport surface of the transport device, the water-free mixture presses the first film against the transport surface. Since the action of fixing the first film to the conveying surface is exhibited, the output of the means for adhering or pressing the first film to the conveying surface to fix the first film to the conveying surface can be reduced.

In the method of the present invention, when roll films wound in a roll shape are used as both the first and second films, a sheet-shaped product obtained by cutting both films into the dimensions of each heating element is used. Both films can be continuously supplied with a simpler structure than the case, and since it is not necessary to control the supply position to the transfer surface in the transfer direction, the production of the heating element for carrying out the method of the present invention. In addition to simplifying the structure of the device and making it inexpensive, the supply rate can be increased to increase the production amount per unit time.

The apparatus preferably used in the method of the present invention is, as described above, a conveying apparatus for conveying the first film, and is arranged on the conveying path of the conveying apparatus, and the solid component of the heating element composition is treated with water. Than the water-free mixture spraying device for dropping the water-free mixture obtained by mixing without adding the water-containing mixture onto the first film in a predetermined range, and the water-free mixture spraying device on the transport path. A water addition device that is arranged at the destination and that adds water to the water-free mixture dropped on the first film, and a water addition device that is further disposed at the destination than the water addition device on the above-mentioned transportation path, The second film is overlaid on the heating element composition composed of the water-free mixture and water dropped onto the film, and the heating element composition is enclosed by the first and second films. A seal for sealing a predetermined portion of both second films And a device.

Thus, while the first film is being conveyed by the conveying device, the method of the present invention, that is, after dropping a predetermined amount of the water-free mixture into a predetermined range on the first film,
A predetermined amount of water is added to the water-free mixture to form a heating element composition, and thereafter, a second film is overlaid on the first film over the heating element composition to form a mixture of both films. Sealing the entire circumference of the heating element composition can be performed.

As a result, the composition of the heating element other than water or the electrolytic water, that is, the water-free mixture is reacted up to the addition of the water or the electrolytic water immediately before being enclosed in the two films without deteriorating the quality. It is possible to continue dropping a high-quality water-free mixture that is uniform and has not deteriorated from the beginning to the end of dropping the water-free mixture that has been put into the water-free mixture supply device.

Immediately after adding water or electrolyte water to the water-free mixture, a mixture of the water-free mixture and water or electrolyte water, that is, the heating element composition is enclosed between two films, so The heating element composition, which does not deteriorate in quality due to the reaction, can be enclosed in two films, and a high-quality product can be stably produced.

Further, according to the apparatus preferably used in the present invention, the water-free mixture introduced into the water-free mixture supply device is not deteriorated by the reaction, so that the water-free mixture loses fluidity. As a result, there is no risk of the water-free mixture adhering to the inside of the water-free mixture supply device, and the water-free mixture can be left in the water-free mixture supply device.

[0216] Further, since the water-free mixture introduced into the water-free mixture supply device is not deteriorated by the reaction, freely add the water-free mixture having the same components to the water-free mixture supply device. You can

As a result, the control of the raw material can be facilitated by omitting the cleaning of the water-free mixture supply device and the filling of the supply device with nitrogen gas, and the composition of the heating element between the two films. It becomes possible to freely set the start time and the end time of the encapsulation process for encapsulating, and increase the flexibility of the manufacturing process.

Further, since the water-free mixture can be left in the water-free mixture supply device, the raw material can be used without being discarded, the yield of the raw material can be increased, and the waste material is troublesome. The processing can be omitted, and the manufacturing cost can be significantly reduced.

Furthermore, since there is no possibility that the water-free mixture loses its fluidity and adheres to the water-free mixture supply device, it is not necessary to wash the water-free mixture supply device, and the operation efficiency can be improved. .

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a plan view showing a part of the belt according to the embodiment of the present invention.

FIG. 3 is a sectional view of a belt according to an embodiment of the present invention.

FIG. 4 is a vertical sectional front view of a main part of a water-free mixture supply device according to an embodiment of the present invention.

FIG. 5 is a vertical cross-sectional front view of a main part of the water addition device according to the embodiment of the present invention.

FIG. 6 is a vertical cross-sectional side view of a main part of a water addition device according to an embodiment of the present invention.

FIG. 7 is an enlarged cross-sectional view of a main part of the water addition device according to the embodiment of the present invention.

FIG. 8 is a vertical sectional side view of a water adding device according to another embodiment of the present invention.

FIG. 9 is a vertical sectional front view of a water addition device according to another embodiment of the present invention.

FIG. 10 is a configuration diagram of another embodiment of the present invention.

[Explanation of symbols]

 1 First Film 2 Transport Device 3 Water-Free Mixture Supply Device 4 Water-Free Mixture 5 Water Addition Device 6 Sealing Device 7 Second Film

Claims (12)

[Claims] 1. A heating element composition containing no water or electrolyte water is mixed to form a water-free mixture, and a predetermined amount of the water-free mixture is dropped into a predetermined range on the first film. After that, a predetermined amount of water or electrolyte water is added to the water-free mixture to form a heating element composition, and then a second film is overlaid on the heating element composition, and then the first and second A method for producing a heating element, characterized in that predetermined portions of both the first and second films are sealed so that the heating element composition is sealed in the second both films. 2. When dropping a predetermined amount of the water-free mixture into a predetermined range on the first film, while moving the first film at a predetermined speed, the water-free mixture is added to the predetermined range. The method for producing a heating element according to claim 1, wherein the heating element is dropped into one from the other toward the other at equal intervals. 3. A predetermined amount of water is added to the water-free mixture that has fallen in a predetermined range on the first film in equal intervals from one side to the other side of the first film.
The method for manufacturing a heating element according to. 4. The water or electrolyte water is forcibly discharged from the addition device by using a pressurized fluid and is added to the water-free mixture on the first film. Method for manufacturing heating element. 5. The method for manufacturing a heating element according to claim 4, wherein the pressurized fluid is a compressed gas. 6. The method for manufacturing a heating element according to claim 4, wherein the pressurized fluid is pressurized water. 7. The water-free mixture in the first film is recessed downward in a predetermined range where the water-free mixture is dropped, and then the water-free mixture is dropped into the recessed portion. A method for producing the heating element described. 8. A first film is conveyed by a conveying device, and first, second, and third stages are set in this conveying path in order from a conveyance source to a conveyance destination, and the first stage is used to perform the above-mentioned steps. The heat generation according to claim 1, wherein the water-free mixture is dropped, water or electrolyte water is added in the second stage, and both the first and second films are sealed in the third stage. Body manufacturing method. 9. A transport surface of the transport device is provided with a concave portion at a position corresponding to a predetermined range of dropping of the water-free mixture in the first film, and the first film is vacuum-sucked to this transport surface. The method for manufacturing a heating element according to claim 7 or 8, wherein the first film is thereby fixed to the transport surface and the predetermined range is recessed downward. 10. The method for producing a heating element according to claim 7, wherein the water-free mixture is adsorbed on the transfer surface of the transfer device. 11. The method for producing a heating element according to claim 10, wherein the first film is made of a breathable film, and the water-free mixture is vacuum-adsorbed on the conveying surface of the conveying device. 12. The method for producing a heating element according to claim 10, wherein the water-free mixture is magnetically adsorbed on the conveying surface of the conveying device.