JP2012069289A - Induction heating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an induction heating apparatus which is capable of effectively heating a production kiln made of a non-magnetic metal.SOLUTION: Induction heating apparatus 9A-9C comprise: production kilns 8A-8C made of a non-magnetic metal; an induction heating coil 27 for heating the production kilns 8A-8C by a high-frequency magnetic field; and magnetic bodies 28 which are disposed on the side opposite to the production kilns 8A-8C across the induction heating coil 27.

Description

  The present invention relates to an induction heating apparatus.

  The cosmetic manufacturing process includes a step of emulsifying raw materials while heating, and a step of cooling to an appropriate temperature. As a heating method, for example, there is a method using electromagnetic induction as disclosed in Patent Document 2 in addition to the method using steam as disclosed in Patent Document 1, for example.

Japanese Patent Laid-Open No. 8-141381 JP 2003-290031 A

  Since cosmetics are in direct contact with the skin, a very high level of hygiene is required for the production equipment that produces them. That is, it is necessary to use a material excellent in corrosion resistance for manufacturing pots and piping that are touched by cosmetic raw materials in order to maintain a high level of hygiene.

  Here, when heating the raw material, if the heating method using electromagnetic induction is adopted, the transport of the production kettle becomes easier compared to the case where a high-temperature steam pipe is connected to the production kettle. Is easy to deal with. However, in order to maintain the sanitary level required for the production kettle, a material that is not suitable for induction heating must be used for the production kettle. Examples of such a material include nonmagnetic austenitic stainless steel having excellent corrosion resistance.

  This invention is made | formed in view of such a subject, and makes it a subject to provide the induction heating apparatus which can heat the manufacturing pot comprised with a nonmagnetic metal effectively.

  In the present invention, in order to solve the above-described problems, the magnetic body is arranged on the side opposite to the manufacturing kettle with the induction heating coil interposed therebetween.

  Specifically, a manufacturing pot composed of a non-magnetic metal, an induction heating coil for induction heating the manufacturing pot with a high frequency magnetic field, and a magnetic body disposed on the opposite side of the manufacturing pot across the induction heating coil And comprising.

  A nonmagnetic metal has a low magnetic permeability and a small eddy current, so that Joule heat is hardly generated. A metal having a low magnetic permeability generally has a small magnetic moment and thus hardly generates hysteresis heat. On the other hand, since the magnetic material has a high magnetic permeability, if it is disposed at a position close to the induction heating coil, it is possible to collect a large amount of magnetic flux of the magnetic field that is widely formed around the induction heating coil. If the magnetic flux of the magnetic field formed widely around the induction heating coil is concentrated, the Joule heat and hysteresis heat generated in the nonmagnetic metal placed in the magnetic field formed by these magnetic fluxes will increase. Become.

Here, when the magnetic body is simply placed around the nonmagnetic metal, much of the magnetic flux passes through the magnetic body, and there is a possibility that the nonmagnetic metal cannot be effectively induction-heated. However, in the induction heating device, since the magnetic body is disposed on the opposite side of the manufacturing pot with the induction heating coil interposed therebetween, the magnetic flux to be transmitted through the manufacturing pot is not concentrated on the magnetic body. In addition, since most of the magnetic flux on the opposite side of the production kettle across the induction heating coil is concentrated on the magnetic body, the production kettle also arranges the magnetic flux formed on the opposite side of the magnetic body across the induction heating coil. The density of the magnetic flux passing through the manufacturing pot is increased by being concentrated in the space to be generated. As a result, effective heating of the production pot is realized.

  In addition, the said magnetic body is rod-shaped, and a plurality may be arrange | positioned radially from the center of the said induction heating coil. Since the magnetic flux is formed so as to circulate around the winding of the induction heating coil, by arranging the rod-like magnetic bodies radially, the heating portion of the production kettle can be heated almost uniformly without being mottled. .

  Further, the bottom of the manufacturing kettle is narrowed toward the discharge hole provided in the lower portion, and the induction heating coil is formed with a winding along the lower portion of the bottom of the manufacturing kettle, A plurality of the magnetic bodies may be arranged radially so as to cover the lower side of the winding formed along the bottom portion of the manufacturing pot having a bottomed shape. If the bottom of the manufacturing pot is provided with a discharge hole at the bottom of the manufacturing pot and the bottom of the manufacturing pot is narrowed toward the discharge hole, it is easy to discharge when transporting the manufacturing pot and discharging cosmetics in the manufacturing pot. The production efficiency is improved by the synergistic effect with the non-contact induction heating method that enables easy transport of the production kettle.

  It is possible to effectively heat the production pot made of non-magnetic metal.

It is a layout diagram of a cell production system. It is a front view of a manufacturing cell. It is a structural diagram of a manufacturing pot. It is a structural diagram of a discharge mechanism. It is operation | movement explanatory drawing of a discharge mechanism. It is a structural diagram of an IH heating device. It is the figure which showed the relationship between the magnetic field line of a high frequency magnetic field, and the eddy current induced in a manufacturing pot. It is the graph which showed the relative magnetic permeability in normal temperature about several types of metal materials. It is the graph which showed the hysteresis curve of austenitic stainless steel and ferritic stainless steel. It is the figure which showed the magnetic force line formed when the plate-shaped workpiece | work of austenitic stainless steel is induction-heated with a heating coil. It is the figure which showed the magnetic force line formed when the plate-shaped workpiece | work of an austenitic stainless steel is electromagnetically induced with a coil in the state which has arranged the ferrite core under the heating coil. It is a block diagram of a lid | cover. It is a figure which shows the internal structure of an anchor mixer. It is the figure which showed the opening / closing operation | movement of the lid | cover by a raising / lowering apparatus. It is a processing flow figure of the manufacturing process of the cosmetics in a manufacturing cell.

  Hereinafter, embodiments of the present invention will be described. The embodiment described below exemplifies one aspect of the present invention. That is, the present invention is not limited to the following embodiments.

FIG. 1 is a layout diagram of a cell production system 1 according to the present embodiment. The cell production system 1 includes a manufacturing cell 2 that controls a cosmetic manufacturing process such as dissolution and emulsification of raw materials, and a filling cell 3 that controls a process of filling the manufactured cosmetic into a container. The cell production system 1 is laid out so that the operation devices of the production cell 2 and the filling cell 3 are integrated into one operation area 4, and a series of processes from melting of raw materials to filling are performed by one person. Is also possible.

  FIG. 2 is a front view of the manufacturing cell 2. The production cell 2 includes three units, a dissolution unit 5A, B, and an emulsification unit 5C. Each unit is mounted on a gantry 7 provided with a control panel 6, and manufacturing pots 8A to 8C containing raw materials are set. The gantry 7 secures a gap between the dissolution units 5A and 5B or the emulsification unit 5C and the floor, so that the legs of the hand lifter that transports the manufacturing kettle do not interfere with each other. Although the manufacturing pots 8A to 8C set in each unit are all the same, for convenience of explanation, in the present application, the manufacturing pot set in the melting unit 5A is manufactured in the manufacturing pot 8A and the melting unit 5B. The kettle is referred to as a production kettle 8B, and the production kettle set in the emulsification unit 5C is referred to as a production kettle 8C.

The melting unit 5A includes an IH (Induction Heating) heating device 9A for heating the production kettle 8A, a lid 10A for closing the opening of the production kettle 8A, an elevating device 11A for raising and lowering the lid 10A, and an IH heating device 9 12A is provided. A stirrer 13A that stirs the raw material charged into the manufacturing pot 8A is attached to the lid 10A. The melting unit 5A has a pressure adjustment mechanism, and adjusts the pressure appropriately by depressurizing or pressurizing the inside of the manufacturing pot 8A whose opening is closed by the lid 10A. The same applies to the dissolution unit 5B and the emulsification unit 5C.

  The stirrer 13A is composed of a rotor and a screen having a large number of slits. By rotating the rotor at a high speed, the raw material is passed between the rotor and the screen with a minute clearance maintained, and dissolved and stirred. To do. The stirrer 13A is attached to the lid 10A.

  FIG. 3 is a structural diagram of the production hook 8A. The manufacturing hook 8 </ b> A is open on the upper side and includes a cylindrical side portion 14 and an inverted conical bottom portion 15. The production pot 8A is made of austenitic stainless steel (SUS304) which is easily available. Stainless steel exhibits excellent corrosion resistance due to a thin and uniform passive film formed by chromium (Cr) added to the steel material. Stainless steel is excellent in hygiene due to its corrosion resistance and is suitable for the production of cosmetics.

  The side portion 14 of the manufacturing hook 8A has a double structure, and is formed so that a space (hereinafter referred to as a side jacket 16) through which cooling water for cooling flows. A joint 17 for connecting a cold water pipe flowing to the side jacket 16 is attached to the outer surface of the manufacturing pot 8A. The cold water pipe is a flexible hose, and can be connected to and detached from the manufacturing kettle 8A by a detachable joint 17.

  A discharge mechanism 18 for discharging the raw material in the manufacturing pot 8A is attached to the bottom 15 of the manufacturing pot 8A. Since the bottom portion 15 has an inverted conical shape, the raw materials in the manufacturing pot 8A gather in the discharge mechanism 18 and can be easily discharged. FIG. 4 is a structural diagram of the discharge mechanism 18. The discharge mechanism 18 includes a ball valve 20 for opening and closing a discharge hole in the bottom 15 of the manufacturing hook 8A, and a piston-like jig 22 that fills a dead space that can be formed in the discharge hole.

  The jig 22 includes a head 23 that fits in the dead space and a shaft 24 for pushing up the head 23. The head 23 has the same outer diameter as the inner diameter of the discharge hole, and closes the flow path of the discharge hole when fitted in a dead space.

  On the other hand, the passage in the ball valve 20 has an inner diameter that is slightly larger than the outer diameter of the head 23. The shaft 24 is hollow, and is provided with a hollow portion 25 and minute holes 26 </ b> A and B that communicate with the hollow portion 25.

  FIG. 5 is an explanatory diagram of the operation of the discharge mechanism 18. In the production pot 8A, the ball valve 20 is normally closed so that the raw materials are not discharged (FIG. 5A). On the other hand, when the raw material put into the production pot 8A is stirred or emulsified, the ball valve 20 is opened and then the jig 22 is pushed up (FIG. 5B). When the jig 22 is pushed up to the end, the head 23 fits in the dead space (indentation) to fill the dead space, and the discharge path is blocked (FIG. 5C).

  On the other hand, when discharging the raw material, the ball valve 20 is opened and the jig 22 is left as it is (FIG. 5D). When the ball valve 20 is opened, the raw material in the manufacturing pot 8 </ b> A passes through the discharge hole and the ball valve 20. The raw material passes through the micro holes 26A, the hollow portion 25, and the micro holes 26B and is discharged below the manufacturing pot 8A.

  The description of the manufacturing pot 8A is as described above. The manufacturing pots 8B and XC are the same as the manufacturing pot 8A.

  Next, the IH heating device 9A will be described. FIG. 6 is a structural diagram of the IH heating device 9A. The IH heating device 9 </ b> A includes a coil 27 and a ferrite core 28. The coil 27 is a conducting wire that circulates in the space in which the manufacturing hook 8A is fitted, and generates a high-frequency magnetic field when an alternating current of several tens of kHz is applied by an inverter that generates a high-frequency current. The inverter controls the phase between the current flowing through the coil 27 and the output voltage so that the heating power input to the manufacturing pot 8A is constant. A resonance capacitor for amplifying the current flowing through the coil 27 by a resonance action is connected between both poles of the coil 27. In addition, the IH heating device 9A is provided with auxiliary equipment such as a cooling fan and a power supply unit for cooling the coil 27 and the inverter.

  The dissolution unit 5B and the emulsification unit 5C are also provided with IH heating devices 9B and 9C similar to the IH heating device 9A.

FIG. 7 is a diagram showing the relationship between the magnetic field lines of the high-frequency magnetic field generated around the coil 27 and the eddy current induced in the manufacturing hook 8A. In FIG. 7, the shapes of the manufacturing hook 8 and the coil 27 are simplified for easy understanding. When the production kettle 8A is placed in the high frequency magnetic field generated by the coil 27, the production kettle 8A is made of stainless steel. Therefore, an eddy current in the direction (Lenz's law) that cancels the high frequency magnetic field is formed on the material constituting the production kettle 8A. Induced. Since the stainless steel constituting the manufacturing pot 8A has electric resistance, it generates Joule heat represented by the following Equation 1 according to Joule's law. As a result, the manufacturing pot 8A itself generates heat, and induction heating is realized.

In induction heating, the input power P input to the workpiece (corresponding to the manufacturing kettle) that is the object to be heated is proportional to the skin resistance Rs of the workpiece and is the square of the magnetic field strength H that is the source of the eddy current. Proportional. The skin resistance Rs of the workpiece is proportional to the square root of the electrical resistivity ρ and permeability μ of the material constituting the workpiece, and the frequency f of the current flowing through the heating coil. The strength H of the magnetic field is proportional to the number N of turns of the heating coil and the current I flowing through the heating coil. Therefore, the input power P can be expressed by the following formula 2.

  In order to heat the work effectively, the input power P may be increased so that the eddy current flowing through the work itself increases. In order to increase the input power P, as is apparent from Equation 2, there is a coil side measure such as increasing the number N of turns of the heating coil, the current I flowing through the heating coil, and the frequency f of the current flowing through the heating coil. It is effective.

  Here, when increasing the number of turns N of the heating coil and the current I flowing through the heating coil, it is necessary to reduce the loss and increase the breakdown voltage of the heating coil. Specifically, the coil wire is made thin or twisted. It is necessary to take measures such as wiring and strengthening insulation between coil wires. In addition, when the frequency f of the current flowing through the heating coil is increased, the number of times the semiconductor switching element in the inverter performs ON-OFF operation increases in proportion to the frequency f, so that an increase in switching loss of the semiconductor switching element should be suppressed. Therefore, it is necessary to reduce the loss of the inverter.

  However, when taking measures such as reducing the loss and increasing the breakdown voltage of the heating coil, if the coil wire is made thin, it becomes difficult to adjust the tension when twisting the coil wire and to secure the thickness of the insulating film. Further, when taking measures such as reducing the loss of the inverter, it becomes difficult to control the circuit that performs the zero current switching for suppressing the switching loss in proportion to the frequency f.

  As is clear from the above, when the coil side measures such as increasing the number of turns N of the heating coil, the current I flowing through the heating coil, and the frequency f of the current flowing through the heating coil are taken, due to technical problems, the input power P There is a natural limit to increasing the size. Therefore, it can be understood that a work-side policy of selecting the work material from the side of electric resistivity ρ and magnetic permeability μ is also important.

  FIG. 8 is a graph showing the relative magnetic permeability at room temperature for several types of metal materials. In detail, the relative magnetic permeability of five kinds of metal materials of ordinary steel, ferritic stainless steel, austenitic stainless steel, copper, and aluminum is shown. As can be seen from this graph, the relative permeability of austenitic stainless steel is lower than that of ordinary steel and ferritic stainless steel. Therefore, as in the cell production system 1 according to the present embodiment, when it is desired to induction-heat the production pot 8A made of austenitic stainless steel in response to a request from the aspect of hygiene, facilities, and production efficiency, no device is applied Then, the input power P cannot be increased.

  As a countermeasure in this case, it is conceivable to coat the outer surface of austenitic stainless steel by thermal spraying a material having high magnetic permeability. However, since the production pots 8A to 8C are assumed to be taken in and out of the IH warming devices 9A to 9C and transported, the coating may be damaged and peeled off during transport.

  Here, the reason why the relative permeability of austenitic stainless steel is lower than that of ferritic stainless steel is as follows. In other words, the quantum spin of the particles that make up ferritic stainless steel has a large magnetic moment as a whole because adjacent spins continue to be aligned in the same direction at room temperature without being disturbed by thermal fluctuations. Exhibits strong ferromagnetism. On the other hand, the quantum spin of the particles constituting the austenitic stainless steel falls into a state where there is no spontaneous orientation at room temperature due to disturbance due to thermal fluctuation, and exhibits paramagnetism with almost no magnetic moment.

  Note that austenitic stainless steel does not have a magnetic moment not only at normal temperature but also below the Neel temperature, but this is because the quantum spin of particles constituting the austenitic stainless steel is such that adjacent spins are in opposite directions. This is because, when aligned in a state of being oriented, the whole has no magnetic moment and exhibits antiferromagnetism. However, since the Neel temperature of the austenitic stainless steel is about several tens of K, the austenitic stainless steel does not exhibit antiferromagnetism at room temperature.

  Also, ferritic stainless steel does not exhibit ferromagnetism under any circumstances. That is, when the ferritic stainless steel has a temperature higher than the Curie temperature, the quantum spin of the particles constituting the ferritic stainless steel falls into a state where there is no spontaneous orientation due to disturbance due to thermal fluctuation, and the magnetic moment is reduced. It shows almost no paramagnetism. However, since the Curie temperature of ferritic stainless steel is slightly different depending on the component ratio of the materials constituting the stainless steel, but generally reaches about 1000 ° C., in the temperature range used in the cell production system 1, ferrite Stainless steel does not reach paramagnetism.

The Joule heat can be expressed by the following mathematical formula in consideration of Ohm's law.

  Here, since the voltage E (V) is proportional to the rate of change of the magnetic flux according to Faraday's law of electromagnetic induction, if this is constant, the eddy current can be reduced by lowering the electrical resistivity ρ of the material constituting the workpiece. It is conceivable to increase the Joule heat by increasing. However, when stainless steel is unavoidable as a material for the manufacturing pots 8A to 8C from the viewpoint of hygiene, there is not much room for taking measures to optimize the electrical resistivity ρ. This is because stainless steel exhibits a resistance value of about 60 to 70 μΩ · cm, which is several tens of times the electrical resistivity ρ of copper at room temperature, regardless of whether it is ferritic or austenitic.

By the way, in induction heating, in addition to the Joule heat described above, hysteresis heat generated due to the magnetic hysteresis of the workpiece is applied. Hysteresis heat Pn is caused by a delay in tracking the change in the magnetic flux of the high-frequency magnetic field with respect to the change in the direction of the current flowing through the heating coil, and is expressed by the following equation.

  Here, the hysteresis coefficient η is unique to the material constituting the workpiece, and it can be derived from Equation 4 that the hysteresis heat Pn is proportional to the hysteresis coefficient η. Therefore, in order to effectively perform induction heating, it is desired that a material having a large hysteresis coefficient η is selected as a workpiece material or the magnetic flux density B is increased from the viewpoint of promoting heating by hysteresis heat.

FIG. 9 is a graph showing hysteresis curves of austenitic stainless steel and ferritic stainless steel. The permeability of ferritic stainless steel is extremely large compared to the permeability of austenitic stainless steel. Therefore, the size of the portion surrounded by the hysteresis curve of the ferritic stainless steel, in other words, the size of the hysteresis coefficient η of the ferritic stainless steel is much larger than the hysteresis coefficient η of the austenitic stainless steel. From this, it can be seen that austenitic stainless steel is inferior in the heating effect due to hysteresis as compared with ferritic stainless steel.

  In consideration of the above circumstances, the ferrite core 28 of the IH heating device 9A covers the lower side of the coil 27 in order to promote induction heating of a manufacturing pot made of austenitic stainless steel. It is attached radially. Hereinafter, the effect of the ferrite core 28 will be described.

  FIG. 10 shows lines of magnetic force formed when an austenitic stainless steel plate-like workpiece is induction-heated with a heating coil. Since the magnetic permeability of austenitic stainless steel is not much different from that of air, magnetic lines of force as shown in FIG. 10 are formed around the heating coil when no ferrite core is installed.

  FIG. 11 shows lines of magnetic force formed when an austenitic stainless steel plate-like workpiece is induction-heated with a heating coil in a state where the ferrite core is arranged below the heating coil. The ferrite core is a ferromagnetic body obtained by sintering a metal oxide with ceramic and has extremely high magnetic permeability. For this reason, when the ferrite core is installed on the lower side of the heating coil, the magnetic flux on the lower side of the heating coil is attracted to the ferrite core and passes therethrough. As a result, most of the magnetic flux that has spread over a wide area around the heating coil gathers around the heating coil, and the magnetic flux density and magnetic field strength in the space where the workpiece is installed increase. As a result, the magnetic flux passing through the workpiece increases, the apparent permeability increases, and the Joule heat and hysteresis heat generated in the workpiece increase to realize effective induction heating.

  The IH heating device 9A is as described above. The same applies to the IH heating devices 9B to 9C. Next, since the lid 10C among the lids 10A to 10C is different from the lids 10A and XB, the difference will be described.

  FIG. 12 is a configuration diagram of the lid 10C. In addition to the agitator 13C described above, an anchor mixer 29 is attached to the lid 10C. The lid 10 </ b> C is provided with an anchor mixer 29 disposed so as to penetrate the center and a stirrer 13 </ b> C disposed on the side of the anchor mixer 29.

  The anchor mixer 29 has the same external shape as the anchor used when anchoring a ship etc. on the sea as the name shows. In the anchor mixer 29, a stirring blade 31 extending obliquely upward from the lower end of the shaft 36 is rotated around the shaft 36 connected to the motor 30. The motor 30 can adjust the rotation speed by switching taps or adjusting the frequency of the inverter. A scraper 37 is attached to the stirring blade 31 so as to be close to the bottom surface and the side surface of the manufacturing pot 8 </ b> C, and the raw material attached to the inner surface of the manufacturing pot 8 is scraped off.

  The agitator 13C is arranged such that the lower working part in which the rotor and the screen are built is disposed in the space between the shaft 36 and the agitating blade 31, so that it does not come into contact with the rotating anchor mixer 29. ing.

  The anchor mixer 29 has a jacket structure, and cold water supplied from utility piping in the factory flows inside. The cold water is supplied through the rotary joint 32 and passes through the inside of the stirring blade 31.

  FIG. 13 is a view showing the internal structure of the anchor mixer 29. The shaft 36 has a double-pipe structure, and cold water supplied from the utility pipe through the rotary joint 32 flows through the inner pipe 33I. The cold water flowing through the inner pipe 33 </ b> I of the double pipes constituting the shaft 36 branches to the respective stirring blades 31 at the lower end portion of the shaft 36. The stirring blade 31 has an anchor jacket 34 constituted by two water chambers, and the cold water branched to each stirring blade 31 at the lower end portion of the shaft 36 flows into the water chamber 35B below the anchor jacket 34. . The cold water that has flowed into the lower water chamber 35 </ b> B flows into the upper water chamber 35 </ b> U while removing the heat of the raw materials around the stirring blade 31. Then, it passes through the outer pipe 33 </ b> O of the double pipe constituting the shaft 36, and is discharged to the utility facility via the rotary joint 32.

  The anchor jacket 34 is configured in this way for the following reason. That is, the heating coil 27 is disposed in the IH heating device 9C for heating the manufacturing pot 8C so as to mainly heat the lower side of the manufacturing pot 8C. Further, a side jacket 16 is provided on the outer surface of the production hook 8C, and cold water is passed through during cooling. Therefore, it is estimated that the lower part of the manufacturing pot 8C is more difficult to cool than the upper part. Accordingly, in the anchor mixer 29 of the present embodiment, the flow path of the anchor jacket 34 first passes through the lower water chamber 35B and then passes through the upper water chamber 35U.

  The configuration of the lid 10C is as described above. Next, the opening / closing operation | movement of lid | cover 10A-C is demonstrated.

  FIG. 14 is a diagram illustrating an opening / closing operation of the lid 10C by the lifting device 11C. When the lifting device 11C is operated with the lid 10C closing the opening of the manufacturing hook 8C (FIG. 14A), the lid 10C rises (FIG. 14B). The lifting device 11C automatically stops when the lid 10C is raised to a predetermined height (FIG. 14C). When the lid 10C is lowered, it operates in the reverse order to the above. 14 illustrates the case where the lid 10C is raised, the same applies to the lids 10A and 10B.

  When the lids 10A to 10C are raised to a predetermined height by the elevating devices 11A to 11C, the production pots 8A to 8C can be taken out from the IH warming devices 9A to 9C. This makes it possible to move the production pots 8A to 8C to the other dissolution units 5A, XB, the emulsification unit 5C, or the filling cell 3. When moving the production hooks 8A to 8C, use a hand lifter equipped with a fork that supports the production hooks 8A to C so as to be sandwiched between two claws, and move the production hooks 8A to 8C up and down and move their positions. .

  In the manufacturing cell 2 configured as described above, cosmetics are manufactured in a processing flow as shown in FIG. That is, in the production pot 8A, after the raw materials are charged (S101), the lid 10A is closed, and the stirrer 13A is activated to stir and dissolve the raw materials (S102). Further, the IH heating device 9A is activated at an appropriate timing to heat the manufacturing pot 8A (S103), and the raw material is controlled to an appropriate temperature. And if a raw material is adjusted to suitable temperature, a raw material will be thrown into the manufacturing pot 8C (S104).

  In addition, in the production pot 8B, after the raw material different from that charged in the production pot 8A is charged (S201), the lid 10B is closed and the stirrer 13B is started to stir and dissolve the raw material (S202) Do. In addition, the IH heating device 9B is activated at an appropriate timing to heat the manufacturing pot 8B (S203), and the raw material is controlled to an appropriate temperature. And if a raw material is adjusted to suitable temperature, a raw material will be thrown into the manufacturing pot 8C (S204).

  Further, in the production pot 8C, the IH heating device 9C is activated at an appropriate timing to heat the production pot 8C (S401). Further, when the raw materials are charged, the lid 10C is closed, and then the stirrer 13C and the anchor mixer 29 are activated to perform emulsification (S402). When the emulsification is completed, the stirrer 13C and the IH heating device 9C are stopped while the anchor mixer 29 is operated, and cooling is performed by flowing cold water through the anchor jacket 34 and the side jacket 16 (S403).

  In addition, various additive components charged into a stainless steel container or the like (S301) are charged into the manufacturing kettle 8C (S302) at an appropriate timing while the manufacturing kettle 8C is being cooled. In the production pot 8C, the added additive component is mixed with the raw material by the rotating anchor mixer 29 and cooled to an appropriate temperature, whereby the cosmetic production process is completed. The manufactured cosmetics are sampled and inspected. When the cooling is completed, the water in the side jacket 16 and the anchor jacket 34 is discharged with high-pressure air.

  As described above, when the cosmetic manufacturing process in the manufacturing cell 2 is completed, the manufacturing pot 8C is conveyed to the filling cell 3. In the filling cell 3, a robot hand as a handling device grips and moves the filling container, and the container is filled with cosmetics. When filling the container with cosmetics, the manufacturing pot 8C functions as a filling hopper by opening a discharge hole provided in the lower portion of the manufacturing pot 8C. The cosmetics filled in the container are shipped as goods after being packed. Note that the production process executed by the cell production system 1 according to the present embodiment is not limited to the processing flow described above.

  According to the above embodiment, the production kettles 8A to 8C are not connected to the steam pipes and are heated by non-contact induction heating, so that the production kegs 8A to 8C can be easily transferred from the production cell 2 to the filling cell 3. Can be transported. For this reason, it is possible to easily cope with small-quantity and multi-product production, and a series of production processes can be performed alone.

  In addition, according to the above-described embodiment, while being stirred by the anchor mixer 29, it is efficiently cooled by the cold water passing through the anchor jacket 34 as well as the side jacket 16, so that the quality of the cosmetic is kept as it is and the conventional manufacturing method Compared to the above, it can be cooled to a desired temperature in about 80% of the time. By shortening the cooling time, it is possible to prevent quality deterioration of fats and oils contained in cosmetics.

  Moreover, according to the said embodiment, since it emulsifies, stirring with the anchor mixer 29, uniform emulsification can be performed in a short time. Therefore, heating time is shortened and quality deterioration of fats and oils etc. can be prevented.

Since the experiment for verifying the effect of the ferrite core was conducted, the contents and results of the experiment will be described below. In this experiment, two samples shown in the following table were prepared as work to be induction-heated.

In addition, the rated power consumption of the induction heating inverter used in this experiment is 5 kW, the heating coil is a disk-shaped coil having a diameter of 270 mm, and the ferrite core has a dimension of 64 mm (L) × 10 mm (W) × 5 mm. (H).

  The recorded items in the experiment are coil characteristics (inductance L (μH) and coil performance Q in each case when loaded and unloaded), gap, power, output frequency, maximum output current, input voltage, and temperature distribution. The coil performance Q is the ratio of the reactance component and the resistance component.

The experimental conditions are a state in which there is no ferrite core (normal operation), a state corresponding to the present embodiment in which the ferrite core is placed between the workpiece and the coil (condition change 1), and a coil in which the ferrite core is on the opposite side of the workpiece. Three conditions were set: the state placed on the lower side (condition change 2). The experimental results are shown in the following table.

  From the experimental results shown in the above table, it can be seen that in normal operation, the power (kW) of Sample 2 is less than half that of Sample 1 and cannot be effectively heated. This is presumably because the coil and the workpiece are in an unmatched state. Moreover, it turns out that an output frequency increases from an experimental result. This is presumed that the inductance of sample 2 is lower than that of sample 1 because the relative permeability is lower than that of sample 1, thereby reducing the resonance frequency. Also, the experimental results show that the maximum output current increases. This is presumably because the skin effect on the surface of the coil is reduced as the resonance frequency is lowered, thereby reducing the high-frequency resistance and increasing the current value.

  Further, from the experimental results shown in the above table, it can be seen that in the case of condition change 1, the power (kW) is increased in both sample 1 and sample 2 compared to the normal operation, and the heating effect is improved. From this result, it can be seen that by placing the ferrite core on the lower side of the coil opposite to the workpiece, the magnetic flux generated in the coil changes to a magnetic flux effective for induction heating of the workpiece.

  From the experimental results shown in the above table, it can be seen that in the case of condition change 2, the power (kW) is reduced in both sample 1 and sample 2 compared to normal operation, and effective heating cannot be performed. From this result, it can be seen that by placing the ferrite core between the workpiece and the coil, most of the magnetic flux that should pass through the workpiece is absorbed by the ferrite core.

In the above embodiment, the anchor mixer 29 has two stirring blades 31 as shown in FIG. 12, for example, but may be three or more. Further, the number of stirring blades 31, the rotation speed of the motor 30, the temperature of the manufacturing pot 8 </ b> C, the flow rate of cold water, and the like are adjusted as appropriate according to the physical properties of the raw materials charged in the manufacturing pot 8 </ b> C. For example, the number of stirring blades 31 when emulsifying the raw material, the rotation speed of the motor 30, and the temperature of the production kettle 8C are such that the quality of the cosmetic (for example, the viscosity and the size of the bubbles) satisfies the requirements as a product. adjust. The number of the stirring blades 31 is adjusted by appropriately selecting from several types of anchor mixers having different numbers of the stirring blades 31 and exchanging them. Further, the rotation speed of the motor 30 and the flow rate of the cold water when cooling the emulsified raw material are determined based on the degree of adhesion of cosmetics to the anchor mixer 29 and the manufacturing pot 8C (elimination of lumps).

1. Cell production system 2. Manufacturing cell 3. Filling cell 5A, B ... Melting unit 5C ... Emulsification unit 8A, B, C ... Manufacturing kettle 9A, B, C ... IH (Induction Heating) addition Heater 13A, B, C ·· Stirrer 16 · Side jacket 17 · Joint 18 · Discharge mechanism 22 · Jig 27 · Coil 28 · Ferrite core 29 · Anchor mixer 31 · Stirrer blade 34 ·・ Anchor jacket

Claims (3)

A production pot made of non-magnetic metal,
An induction heating coil for induction heating the production kettle with a high frequency magnetic field;
A magnetic body disposed on the opposite side of the manufacturing kettle across the induction heating coil,
Induction heating device. The magnetic body has a rod shape, and a plurality of the magnetic bodies are arranged radially from the center of the induction heating coil.
The induction heating apparatus according to claim 1. The bottom of the manufacturing kettle is narrowed toward the discharge hole provided in the lower part,
The induction heating coil has a winding formed along the bottom of the bottom of the manufacturing kettle,
A plurality of the magnetic bodies are arranged radially so as to cover the lower side of the winding formed along the lower part of the bottom of the manufacturing pot.
The induction heating apparatus according to claim 1 or 2.

Images