JP4018268B2 - Radio wave absorbing plastic material or processing method using radio wave absorbing plastic material molding and radio wave absorbing plastic material molding used therefor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present inventionEngineeringTechnical contactArrival, supplementRadio wave absorbing plastic material suitable for repairs and other processingas well asUsing the molded bodyProcessing method in building constructionAbout.
[0002]
[Prior art]
In machining and building construction, conventionally, processing methods mainly rely on mechanical methods. In building construction, since the material used for processing such as filling and bonding is mortar and steel frame, it is difficult to carry out construction with precise processing accuracy. With these known building materials alone, for example, It was difficult to carry out high-precision processing such as building a building that kept the vacuum and did not leak water.
[0003]
In order to perform the bonding process easily, Japanese Patent Application Laid-Open No. 63-63773 discloses that an adhesive portion of an adherend having thermosetting property or heat melting property has an electromagnetic wave absorbing ability and is irradiated with electromagnetic waves in the vicinity of the bonded portion. A method of heating and bonding is described. Although this method has the advantage that a specific part can be selectively heated by irradiation with electromagnetic waves, it is limited to those in which the adherend is melted or cured by heating, and further, the arrangement of materials having the ability to absorb electromagnetic waves Since the position is also limited, there are restrictions on the application site and shape, which is not suitable for the precision machining field.
[0004]
Although the technology of irradiating and heating electromagnetic waves is widely known, in the fields of machining and building construction, the use of electromagnetic energy as a processing / construction method has conventionally been performed by electrostatic machining, electric welding, photocuring, etc. However, at present, high-precision machining methods in this field have not yet been put into practical use.
[0005]
[Problems to be solved by the invention]
That is, an object of the present invention is to provide a radio wave absorbing plastic material that can easily perform precision bonding, forming, repairing, and the like in the technical fields of machining and building construction. Another object of the present invention is to provide a radio wave absorbing plastic material molded body obtained by previously molding the radio wave absorbing plastic material into a shape suitable for processing.
[0006]
A further object of the present invention is to provide a processing method capable of easily performing precise bonding, forming, repairing and the like in the technical fields of machining and building construction.
[0007]
[Means for Solving the Problems]
  As a result of intensive studies, the present inventors have uniformly dispersed a material that generates heat by absorbing electromagnetic waves in a predetermined matrix.Obtained,Materials suitable for precision processingProcessing method usingFind,The present invention has been completed.
[0008]
  That is, the present inventionProcessing method isAn electromagnetic wave absorbing plastic material in which a radio wave absorbing material capable of converting radio wave energy into heat is dispersed and contained in a thermoplastic material matrixOr use the molded bodyIt is characterized by that.
[0009]
  Here, the radio wave absorbing plastic material is preferably selected from particulate or fibrous carbon, metal, and ferrite, and the thermoplastic material is melted or softened by heating.Can be deformedIt is preferably selected from a thermoplastic resin and a thermoplastic inorganic material.
[0010]
  In addition, the radio wave absorbing plastic material molded body of the present invention,A molded body used in the processing method of the present invention,In the thermoplastic material matrix, a radio wave absorbing material that can convert radio wave energy into heat is dispersed and contained.Softened or melted by the irradiation of radio waves and re-cured by stopping the irradiation of radio wavesIt is characterized by being formed by molding a radio wave absorbing plastic material into a desired shape.
[0011]
  As a processing method using the radio wave absorbing plastic material, a radio wave absorbing material capable of converting radio wave energy into heat is dispersed and contained in a thermoplastic material matrix that is softened by heating, and is softened by radio wave irradiation. Alternatively, an electromagnetic wave absorbing plastic material that is melted and re-cured by stopping radio wave irradiation is filled in a predetermined space of the workpiece or a predetermined space formed by the workpiece.PaddingThe chargeFillerIn placeBy electromagnetic wave irradiation means that irradiates electromagnetic waves locally, the convergence position of the electromagnetic waves is continuously displaced in the depth direction of the gap.Irradiation to soften or melt the radio wave absorbing plastic material and then re-hardenLawCan be mentioned.
[0012]
  Processing of the present inventionMethod, refilling cracks,Occurred on the workpieceGap filling, multiple workpiecesGap filling betweenAnd so onwear.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
  The present inventionPertaining toThe radio wave absorbing plastic materialSoftens by heatingIn the thermoplastic material matrix, a radio wave absorbing material that can convert radio wave energy into heat is dispersed and contained.Softened or melted by the irradiation of radio waves and re-cured by stopping the irradiation of radio wavesRefers to material.
The preferred embodiment contains at least one thermoplastic resin or inorganic thermoplastic material selected from acrylic resin, methacrylic resin, polyamide, polyethylene, polyethylene terephthalate, polyimide, polystyrene, and polyvinyl chloride, and is softened by heating. A thermoplastic material is a radio-absorbing material that has a fibrous shape with a length of 10 mm or less or a particulate shape with an average particle size of 0.1 μm to 10 mm and that can convert radio wave energy into heat. 0.1 to 10% by volume with respect to the material.
[0014]
Here, the radio wave absorptive material is a heat source for softening and melting the thermoplastic material. From the viewpoint of uniformly softening and melting the thermoplastic material efficiently, a small volume is uniformly dispersed in the matrix. It is preferable. Accordingly, it is preferable that the radio wave absorbing material has a particulate or fibrous shape.
[0015]
Here, the radio wave absorbing material is not particularly limited as long as it is a substance that can convert radio wave energy into heat. However, from the viewpoint of dispersibility, safety, and availability, the material may be carbon, metal, or the like. Ferrite and the like are preferably exemplified, and the shape is preferably particulate or fibrous. Specific examples of the radio wave absorbing material that can be used include carbon fiber, carbon black fine particles such as carbon black, metal fibers called metal fibers, metal or metal oxide, fine particles such as intermetallic compounds, fibrous ferrite, or Examples thereof include ferrite fine particles.
[0016]
As the fibrous material, short fibers having a length of 10 mm or less are preferable from the viewpoint of dispersibility, and as the fine particles, those having an average particle diameter of about 0.1 μm to 10 mm are preferable. If the particle size is too small, secondary aggregation is likely to occur, uniform dispersion is difficult, and handling properties are reduced. On the other hand, if the particle size is too large, precipitation tends to occur, uniform dispersion becomes difficult, heat generation tends to be local, and it is difficult to uniformly apply heat to the thermoplastic material.
[0017]
As the thermoplastic material that is a matrix material, known thermoplastic resins, inorganic materials having thermoplastic properties such as glass can be used according to the purpose, but in relation to the heat generation capability of the radio wave absorbing material. In the case of an inorganic material such as glass, the melting temperature or softening point is preferably 1500 ° C. or less, and in the case of an organic material such as a resin, a temperature of about 150 to 250 ° C. is preferable. If the softening point or the melting temperature is too high, a large amount of energy is required for processing, and if it is too low, the heat resistance of the workpiece or the processed bonded portion is lowered, which is not preferable.
[0018]
Specific examples of thermoplastic materials include acrylic resins, methacrylic resins, polyamides, polyethylenes, polyethylene terephthalates, polyimides, polystyrenes, polyvinyl chlorides and other thermoplastic resins and fiber reinforced resins in which known reinforcing fibers are mixed ( FRP) and inorganic thermoplastic materials such as glass. Depending on the type of glass, although the melting temperature is high, some materials have a relatively low softening temperature and can be said to be a material that can be suitably used in the present invention. For example, in the case of soda-lime glass, although the melting temperature is as high as 1400 to 1500 ° C., the softening point is 500 to 700 ° C., which is a suitable material.
[0019]
The mixing ratio of the thermoplastic material and the radio wave absorbing material can be appropriately selected depending on the desired thermal characteristics, adhesive strength, etc. Generally, the amount of heat generated when an electromagnetic wave is irradiated is a unit of the radio wave absorbing material. Since it is proportional to the concentration per volume, the blending amount of the radio wave absorbing material to be blended in the thermoplastic material may be determined in consideration of Joule heat generated by the radio wave absorbing material with respect to a predetermined electromagnetic wave intensity. For example, the amount of addition may be small when processing can be performed with the temperature of the thermoplastic material warming, but the amount of addition is also increased when the thermoplastic material needs to be completely melted, such as surface bonding. There is a need. Further, when the thermoplastic material is softened or melted at a low temperature, a small amount may be used. When the thermoplastic material is relatively high, a larger amount is required to achieve the same processability. As described above, the blending ratio is appropriately determined depending on the purpose and the material to be used. Generally, it is sufficient to blend about 0.1 to 10% by volume with respect to the thermoplastic material, and 0.5 to 3 volume. % Is preferable.
[0020]
For example, when acrylic is used as the thermoplastic material and carbon fiber is blended as the radio wave absorbing material, the blending ratio is preferably about 100: 10 to 100: 0.1 in volume ratio.
[0021]
The radio wave absorbing plastic material of the present invention is produced by uniformly dispersing a particulate or fibrous radio wave absorbing material in a thermoplastic material. As this method, a known solid dispersion method may be applied. For example, in the same manner as in the production of FRP containing metal fiber or carbon fiber as a reinforcing material, in the final stage of kneading of the thermoplastic material, the fiber A mixture of solid or particulate electromagnetic wave absorbing material and kneading until well dispersed, or by adding a predetermined amount of the electromagnetic wave absorbing material to the thermoplastic material, the softening point of the thermoplastic material or the melting temperature or higher The method etc. which stir and mix until it heats are mentioned. The kneading, stirring, and mixing processes must be performed until they are uniformly dispersed, and are usually performed for about 1 to 10 hours. In addition, from the viewpoint of the stability of the material, it is also a preferred embodiment that the compounding is performed in a reducing atmosphere.
[0022]
This radio wave absorbing plastic material can be applied to a workpiece by a method such as filling a desired gap in a molten state, or dissolving in a solvent and applying to a desired site.
[0023]
  The radio wave absorbing plastic material can also be used as a molded body that has been previously molded into a desired shape. In other words, handling properties can be improved by using pellets, particles, etc.RuIs good. furtherIs the electricWhen the radio wave absorbing plastic material of the present invention is used for the purpose of providing a partition wall between two reactive materials until the wave is irradiated, a bag-like or microcapsule-like molded body may be formed.. ThisIn order to obtain these molded products, a normal thermoplastic material molding method may be applied as it is.
[0024]
  Of the present inventionIn constructionThe processing method is a radio wave absorbing plastic material in which a radio wave absorbing material capable of converting radio wave energy into heat is dispersed and contained in a thermoplastic material matrix.To chargeDesired or softened by irradiation with radio wavesFilling the voidCan be implemented. Specified radio wave absorbing plastic material is processedGapTo be in contact with the workpiecefillingAnd at the filling pointBy electromagnetic wave irradiation means that irradiates electromagnetic waves locally, the convergence position of the electromagnetic waves is continuously displaced with respect to the depth of the gap.It is based on the method of softening and melting by irradiating radio waves, stopping the irradiation of radio waves and re-hardening, and applying this to various parts, repairing, bonding, fillingFillingCan be performed with high accuracy.
[0025]
Specifically, for example, when a predetermined space of a workpiece is filled and placed with a radio wave absorbing plastic material and the filling site is irradiated with radio waves, the radio wave absorbing material generates heat due to radio wave irradiation, and the heat causes thermoplasticity. The material is softened or melted and deformed so as to be in close contact with the space, and by stopping the irradiation of radio waves, the thermoplastic material is cured again in a state suitable for the shape of the predetermined space, so that the gap is filled with high accuracy. be able to. If this method is used for cracks formed on the wall surface, the filled material once melts and re-hardens, so the cracks are filled without gaps, and repair of cracks that can block moisture and air is easily performed. be able to. When this space is a through-hole, when filling the radio wave absorbing plastic material, the space can be efficiently filled by suction from the opposite side. Further, if a radio wave absorbing plastic material is disposed in a space formed between two processed bodies, the two objects can be bonded in the same manner.
[0026]
Next, the processing method using the molded object of a radio wave absorption plastic material is demonstrated. In this method, a molded body made of a radio wave absorbing plastic material in which a radio wave absorbing material capable of converting radio wave energy into heat is dispersed and contained in a thermoplastic material matrix is placed in contact with an adherend. The molded body and the adherend are fixed by irradiating the molded body with radio waves to soften or melt the molded body and then re-harden it.
[0028]
In addition, using the molded article of the radio wave absorption plastic material in the form of particles or pellets, the filling of the space as described above when using the radio wave absorption plastic material can be similarly performed. Particulate or pellet shaped radio wave absorbing plastic material moldings are excellent in handling properties when filled and arranged in a predetermined space. When this particle-shaped wave-absorbing plastic material molded body is filled in cracks and irradiated with radio waves, the apparent volume of the molded body may decrease due to melting, but in this case, the particle-shaped wave-absorbing plastic material is further reduced. It is also possible to add a material molded body and then perform electromagnetic wave irradiation to completely fill the cracks.
[0031]
The radio wave absorbing plastic material of the present invention is processed by irradiating the radio wave with a predetermined position to soften or melt the radio wave absorbing plastic material, but the irradiated radio wave is dispersed and contained in the material. Those that can efficiently generate heat (generation of Joule heat) of the radio wave absorbing material to be used are preferable. For example, electromagnetic waves having a wavelength of about 1 m to 1 cm, microwaves, and the like are preferable.
[0032]
  Irradiation of radio waves can be performed by a conventional method, but usually, from the viewpoint of energy efficiency, a local radio wave radiating means is used. For example, as shown in FIG. It is preferable to irradiate the processed part of the radio wave absorbing plastic material 12 with radio waves (indicated by arrows in the figure) from a radio wave radiator using 10 or the like, as shown in FIG. More preferably, the radio wave from the horn antenna 10 is converged by a parabolic antenna (rotary parabolic reflector) 14 positioned on the opposite side of the processing portion where the radio wave absorbing plastic material 12 is disposed. thisConical electromagnetic horn antenna 10 orBy displacing the position of the parabolic reflector 14, the radio wave is radiated intensively to a desired position while displacing the convergence point.The
[0033]
When it is difficult to place a reflector on the opposite side due to the conditions of the processing site, the horn antenna 10 is combined with a radio wave converging means such as a dielectric lens 16 to directly converge the electromagnetic wave, and the horn antenna 10 itself By displacing the position, a method of irradiating radio waves intensively at a desired position while displacing the convergence point by the dielectric lens 16 (see FIG. 2), or shielding electromagnetic waves that are scattered back to the irradiation side. At the same time, in order to efficiently collect energy at the site to be processed, a method of placing the planar reflector 18 or the parabolic reflector 14 only on the radio wave radiator 10 side (see FIGS. 3A and 3B). ) Etc. can be applied. In particular, as shown in FIG. 3B, in the method using the parabolic reflector 14 on the radio wave radiator 10 side, it is possible to converge and reflect the backscattered energy. A radio wave absorber 20 can be placed around the reflectors 14 and 18 to increase the shielding efficiency.
[0034]
  Also, as shown in FIGS. 4A and 4B, a planar reflecting plate 18 or a parabolic reflecting plate 14 is placed on both sides opposite to the radio wave irradiation side, and reflected between both ends to further increase energy. Efficiency can also be improved. In addition, as a combination, you may combine flat reflectors (refer FIG. 4 (A)), parabolic reflectors (refer FIG. 4 (B)), or a flat reflector and a parabolic reflector. In addition, when the distance can be accurately controlled, a Fabry-Perot resonator can be configured, and energy can be more efficiently converged on the workpiece. In this case, energy is collected in the central part in the entire thickness direction.But thisMove the convergence pointIt is preferable.
[0035]
These are efficient electromagnetic wave irradiation methods. On the other hand, in order to reduce the influence of electromagnetic waves on other structures and human bodies, the reflection from the radio wave from the horn antenna located on the opposite side of the part to be processed. It is also possible to prevent the diffusion of the radio wave to other than the part that is desired to be irradiated by reflecting it with a plate.
[0036]
  The conductive radio wave absorbing material such as metal fiber and carbon fiber contained in the radio wave absorbing plastic material of the present invention is heated by the irradiation of electromagnetic waves. This is because Joule heat is generated by the current flowing upward. Due to this heat generation, the thermoplastic material that is the matrix is softened or melted and processed, but with this heat generation reaction, the metal itself, the carbon fiber or other material that acts as an antenna melts or oxidizes, etc. If the electrical conductivity decreases due to, the entire material may not exhibit radio wave absorption performance. In the present invention,In order to irradiate the convergence position of the electromagnetic wave continuously in the depth direction of the gap by the electromagnetic wave irradiation means for locally radiating the electromagnetic wave, the gap was filled.The reaction proceeds to the depth of the radio wave absorbing plastic material, and the precision of the deep memberprocessingCan be implemented.
[0037]
Applying this reactivity, when joining thick thermoplastic materials, the blending amount per unit weight of the radio wave absorbing material of the joint is small in the vicinity of the radio wave radiator, and is inclined so as to increase as it moves away from the opposite side. By giving the property, it becomes possible to heat the whole at a substantially uniform temperature, and uniform processing can be performed.
[0038]
Furthermore, when the workpiece is a thermoplastic material, for example, the same thermoplastic material is used as the matrix material and the workpiece material, so that the electromagnetic wave absorbing plastic material is uniformly contained in the thermoplastic material that is the workpiece by melting. By setting the conditions for diffusing, it is possible to perform processing without leaving a trace of the joint portion.
[0039]
  In this way, the temperature of the radio wave absorbing plastic material tends to decrease as the distance from the radio wave radiation source decreases.The electromagnetic wave convergence position is continuously displaced with respect to the depth of the gap.Therefore, even if there is thermal expansion of the material due to heatingDisplacement of radio wave convergence positionTherefore, there is an advantage that processing such as repair of a crack and joining can be performed without concentrating internal stress in one place.
[0040]
【Example】
Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited thereto.
[0041]
  (Reference example1)
  [Adjustment of radio wave absorbing plastic material]
  Acrylic, which is a thermoplastic material matrix, is mixed with 1.0% by volume of carbon fiber (average fiber length: 6 mm), which is a radio wave absorbing material, and heated at 150-200 ° C. in a reducing atmosphere with a melt stirrer. By sufficiently kneading for a time, the carbon fiber was uniformly dispersed in the matrix to obtain a radio wave absorbing plastic material. The radio wave absorbing plastic material was molded into particles having an average particle diameter of 1 mm to produce a radio wave absorbing plastic material molded body.
[0042]
[Adhesion processing of thermoplastic material block]
A method for bonding two thermoplastic material blocks will be described.
[0043]
  5 (A) and 5 (B)Reference exampleIt is the schematic which shows the adhesion processing state of the 1 thermoplastic material block. A particulate radio wave absorbing plastic material molded body 12 is sandwiched between two thermoplastic material blocks 22 and 24 each having a thickness of 5 cm (FIG. 5A). An electromagnetic wave (indicated by an arrow in the figure: irradiation condition: 2.45 GHz, 500 W to 1 kW) is irradiated from the horn antenna 10 to the radio wave absorbing plastic material molded body 12 and its vicinity. The radio wave absorbing plastic material molded body 12 that has absorbed the electromagnetic waves is melted by the heat generated by the radio wave absorbing material, and the thermoplastic material blocks are melted and joined together. Since the thermoplastic material blocks 22 and 24 themselves that are workpieces transmit electromagnetic waves, the main body is not affected by the electromagnetic waves.
[0044]
When the electromagnetic wave irradiation is stopped, the radio wave absorbing plastic material is naturally cooled and re-cured, and the two thermoplastic material blocks 22 and 24 are firmly bonded. It was confirmed that this adhesion site was completely in close contact with the outside of the block and could block moisture and gas.
[0045]
  (Reference example2)
  [Adjustment of radio wave absorbing plastic material]
  Reference exampleThe same radio wave absorbing plastic material as used in 1 was molded into a plate shape having a thickness of 5 mm and a washer shape having a thickness of 5 mm, an outer diameter of 30 mm, and an inner diameter of 15 mm, thereby producing a radio wave absorbing plastic material molded body.
[0046]
[Adhesion processing of thermoplastic material block]
Two U-shaped thermoplastic material blocks as shown in FIG. 6A are bonded.
[0047]
  6 (A) and 6 (B)Reference exampleIt is the schematic which shows the adhesion processing state of 2 thermoplastic material blocks. A plate-shaped wave-absorbing plastic material molded body 30 is sandwiched between two U-shaped thermoplastic material blocks 26 and 28 having a thickness of 5 cm, and fixed with bolts 34 with a washer 32 made of a radio-absorbing plastic material. (FIG. 6A).
[0048]
  An electromagnetic wave (indicated by an arrow in the figure: irradiation conditions)Reference example1 is irradiated (FIG. 6B). The plate-shaped radio wave absorbing plastic material molded body 30 and the washer 32 that have absorbed electromagnetic waves are melted by the heat generated by the internal radio wave absorbing material, and the plate-shaped radio wave absorbing plastic material molded body 30 melts the thermoplastic material blocks 26 and 28 together. The washer 32 melts and joins the bolt 34 and the thermoplastic material blocks 26 and 28 together. Since the thermoplastic material blocks 26 and 28 themselves that are workpieces transmit electromagnetic waves, the main body is not affected by the electromagnetic waves.
[0049]
When the electromagnetic wave irradiation is stopped, the radio wave absorbing plastic material molded body 30 and the washer 32 are naturally cooled and re-cured, and the two thermoplastic material blocks 26 and 28 and the washer 32 and the bolt 34 for fixing them are mutually connected. Bonded firmly. It was confirmed that this adhesion site was completely in close contact with the outside of the block and could block moisture and gas.
[0050]
  (Reference example3)
  [Adjustment of radio wave absorbing plastic material]
  Add 0.5% by volume of metal fiber (stainless steel, average fiber length 10 μm) as a radio wave absorbing material to glass (softening point 700 ° C.) as a thermoplastic material matrix and heat to 800 to 900 ° C. In a reducing atmosphere, the mixture was sufficiently kneaded with a melt stirrer for 1 hour to uniformly disperse the metal fibers in the matrix to obtain a radio wave absorbing plastic material. The radio wave absorbing plastic material was molded into particles having an average particle diameter of 1 mm to produce a radio wave absorbing plastic material molded body.
[0051]
[Repair processing of thermoplastic material cracks]
Repair of the crack of the glass block having a crack as shown in FIG.
[0052]
The particulate radio wave absorbing plastic material molded body 38 was filled in the cracks of the glass block 36 (FIG. 7A).
[0053]
Cracks filled with particulate radio-absorbing plastic material molded body 38 from horn antenna 10 and electromagnetic waves in the vicinity thereof (indicated by arrows in the figure: irradiation conditions 2.45 GHz)
10 to 50 kW) is irradiated (FIG. 7B).
[0054]
When metal fiber is used as a radio wave absorbing material and glass is used as a thermoplastic material, the melting point of the metal and glass are close to each other. Disappears and the electromagnetic wave absorption performance is reduced. Thereby, after melting and welding, the metal fiber melts into the glass and disappears, and at the same time, the heat generation stops.
[0055]
The glass itself is radio wave-transmitting and is not affected by electromagnetic waves, but as the heat generation, softening, and melting, the metal fiber that is a heating element is exhausted, and the heat of the melting part stops automatically, and the glass part re-hardens. The metal fiber trace disappears and the repaired portion is hardly noticeable.
[0056]
  (Reference example4)
  [Adjustment of radio wave absorbing plastic material]
  Reference example3, a radio wave absorbing plastic material in which metal fibers are uniformly dispersed in a glass matrix is obtained, and the radio wave absorbing plastic material is molded into a plate shape having a thickness of 10 mm. Produced.
[0057]
[Press processing of thermoplastic materials]
FIGS. 8A, 8B, and 8C are schematic views showing a state in which plate glass is pressed.
[0058]
  When electromagnetic waves are radiated from the horn antenna 10 to the entire plate-shaped radio wave absorbing plastic material molded body 40 including a glass matrix (irradiation conditions areReference example3), the plate-shaped radio wave absorbing plastic material molded body 40 is softened. While continuing to irradiate electromagnetic waves, press processing is performed using a pair of ceramic molds 42 that fit together to form a desired shape, and the press processing is completed. When 40 is molded into a desired shape, the irradiation of electromagnetic waves is terminated. The plate-like radio wave absorbing plastic material is re-cured and processed into a desired shape (FIG. 8A). Here, a radio wave permeable ceramic mold that does not obstruct electromagnetic wave irradiation to the radio wave absorbing plastic material is used.
[0059]
Similarly, as shown in FIG. 8B, a ceramic mold 44 having a desired shape is used for the entire plate-shaped radio wave absorbing plastic material molded body 40 while irradiating the electromagnetic wave from the horn antenna 10 with a vacuum. The softened plate-like wave-absorbing plastic material is brought into close contact with the ceramic mold by suction, and when it is molded into a desired shape, the irradiation of electromagnetic waves is terminated and re-cured to be processed into a desired shape. .
[0060]
Similarly, as shown in FIG. 8C, a ceramic mold 46 having a desired shape is used to blow the entire plate-shaped radio wave absorbing plastic material molded body 40 while irradiating electromagnetic waves from the horn antenna 10. And vacuum suction, the softened plate-shaped radio wave absorbing plastic material is brought into close contact with the ceramic mold, and when it is molded into a desired shape, the irradiation of electromagnetic waves is terminated, re-cured, and processed into the desired shape. You can also.
[0061]
In addition, a mold (metal mold) is used as a mold, and the same processing as shown in FIG. 8B and FIG. You may go.
[0062]
In this way, the electromagnetic wave-absorbing plastic material is pressed with a mold while being irradiated with electromagnetic waves, or is vacuum-sucked to be in close contact with the mold, or is pressed to be in close contact with the mold. As a result, even thermoplastic materials such as glass plates, which have conventionally been difficult to perform secondary processing, can be processed using a mold by providing them with radio wave absorptivity. By this method, the same processing is possible even when a thermoplastic material such as acrylic is used as a matrix.
[0063]
  (Example 1)
  [Adjustment of radio wave absorbing plastic material]
  Reference exampleThe same radio wave absorbing plastic material as used in 1 was molded into a plate shape having a thickness of 5 mm to produce a radio wave absorbing plastic material molded body.
[0064]
  [Adhesion processing of thermoplastic material block]
  FIG. 9 shows an example.1It is the schematic which shows the adhesion processing state of the thermoplastic material block of. A plate-like radio wave absorbing plastic material molded body is disposed between two thermoplastic material blocks 48 and 50 having a thickness of 15 cm, and electromagnetic waves are irradiated from the horn antenna 10. Irradiation conditionsReference exampleThe same as the case of 1. Since the thermoplastic material blocks 48 and 50 are large in thickness, a parabolic reflector 14 is prepared as a metal plate on the back surface when radiating radio waves to increase the irradiation efficiency of electromagnetic energy. If this parabolic reflector 14 is used, the electromagnetic wave can be reflected, converged to a specific point, and heated strongly. Therefore, by moving the parabolic reflector 14 up and down, By scanning the point where strong heat generation occurs, uniform heating of a thick sample and uniform bonding by melting can be performed with the same electromagnetic wave intensity.
[0065]
  (Reference Example 5)
  [Adjustment of radio wave absorbing plastic material]
  The same radio wave absorbing plastic material as used in Example 1 was molded into a block shape of 10 cm × 200 cm × 200 cm to produce a radio wave absorbing plastic material molded body.
[0066]
[Adhesion processing of radio wave absorbing plastic material block]
The two blocks 48 and 50 made of the above-mentioned radio wave absorbing plastic material are joined. At this time, if the irradiated electromagnetic wave leaks to the surroundings, there is a concern that it may adversely affect the health and environment of the worker, but when attempting to join the radio wave absorbing plastic materials, a schematic diagram is shown in FIG. As described above, the joint portion is surrounded by two metal flat plates 18 and 19, and a horn antenna 10 that irradiates electromagnetic waves is attached to a predetermined portion of one metal flat plate 18, and the horn antenna 10 is arranged in accordance with the joint portion. Irradiate the joint with radio waves. If it does in this way, the electromagnetic wave of an irradiation direction will be absorbed by the radio wave absorption material of a junction part, and the electromagnetic wave which was not absorbed will be reflected by the metal plate 19 of the other side. Further, electromagnetic waves that leak and diffuse into the radio wave absorbing plastic material are attenuated inside the material because the material itself has radio wave absorption performance, and do not leak from between the metal flat plates. If both the metal plates 18 and 19 are simultaneously shifted and sequentially melt bonded, it is possible to bond a plurality of radio wave absorbing plastic material blocks to form a large block.
[0067]
【The invention's effect】
According to the radio wave absorbing plastic material of the present invention, precise bonding, forming, repairing, and the like can be easily performed in the technical fields of machining and building construction. Moreover, according to the radio wave absorbing plastic material molded body of the present invention in which the radio wave absorbing plastic material is previously molded into a shape suitable for processing, there is an effect that the workability and the handleability are further improved.
[0068]
The processing method of the present invention can easily perform processing such as precise bonding, molding, and repair by irradiating radio waves in the technical fields of machining and building construction.
[Brief description of the drawings]
FIG. 1A is a schematic view showing a state in which a radio wave absorbing plastic material of the present invention is irradiated with radio waves using a horn antenna, and FIG. 1B shows a state in which a parabolic reflector for electromagnetic waves is further used. FIG.
FIG. 2 is a schematic diagram showing a state in which a dielectric lens for converging radio waves is provided on a horn antenna.
3A is a schematic diagram showing a state in which a flat reflector is arranged on the horn antenna side, and FIG. 3B is a schematic diagram showing a state in which a parabolic reflector is arranged on the horn antenna side. FIG.
4A is a schematic view showing a state in which flat plate-like reflectors are arranged on both sides of a workpiece, and FIG. 4B is a schematic view showing a state in which a parabolic reflector is similarly arranged. FIG.
FIG. 5A is a schematic view showing a state in which the radio wave absorbing plastic material of the present invention is sandwiched between two thermoplastic material blocks, and FIG. 5B is a diagram showing a horn antenna attached to the radio wave absorbing plastic material. It is the schematic which shows the state which has irradiated the electromagnetic waves.
FIG. 6A is a schematic diagram showing a state in which the radio wave absorbing plastic material of the present invention is sandwiched between two U-shaped thermoplastic material blocks and fixed with bolts, and FIG. It is the schematic which shows the state which has irradiated the electromagnetic wave to the radio wave absorption plastic material with the horn antenna.
7A is a schematic view showing a state in which a particulate radio wave absorbing plastic material is filled in a crack of a thermoplastic material block using a glass matrix, and FIG. 7B is a radio wave absorbing plastic material thereof. It is the schematic which shows the state which is irradiating electromagnetic waves with a horn antenna.
FIG. 8 uses a glass matrix. It is the schematic which shows the state which carries out the secondary processing of the plate-shaped electromagnetic wave absorption plastic material, (A) is the aspect which arrange | positions between two electromagnetic wave-permeable ceramic molds, and (B) The aspect which performs the process which closely_contact | adheres to the same ceramic mold | die by vacuum suction, (C) shows the aspect which performs the process contact | adhered to the same ceramic mold | die by pressurization.
FIG. 9 is a schematic view showing a state where two thick wave-absorbing plastic material blocks are melted and bonded by converging electromagnetic waves irradiated by a horn antenna with a parabolic reflector.
FIG. 10 is a schematic view showing a state where two radio wave-absorbing plastic material block joints are surrounded by two metal flat plates and melted and bonded while preventing leakage of electromagnetic waves.
[Explanation of symbols]
10 Horn antenna (radio wave radiator)
12 Radio wave absorbing plastic material
14 Parabolic reflector
16 Dielectric lens
18, 19 Flat reflector
22, 24, 26, 28 Thermoplastic material block
36 Glass block (thermoplastic material block)
42 Radio wave permeable ceramic mold
48, 50 Electric wave absorbing plastic material block

Claims (4)

In a thermoplastic material matrix containing at least one thermoplastic resin or inorganic thermoplastic material selected from acrylic resin, methacrylic resin, polyamide, polyethylene, polyethylene terephthalate, polyimide, polystyrene, polyvinyl chloride, and softening by heating In addition, it is composed of a material selected from carbon, metal, and ferrite and has a fiber shape with a length of 10 mm or less, or a particle shape with an average particle diameter of 0.1 μm to 10 mm , and energy of radio waves with a wavelength of 1 m to 1 cm. A radio wave absorbing plastic material or a molded product thereof, which is dispersed / contained into a heat absorbing material that can be converted into heat, softens or melts by radio wave irradiation, deforms, and re-hardens by stopping radio wave irradiation. a step of filling a predetermined gap or two gaps between the workpiece of the workpiece, the radio wave absorber plasticizer The material or site filled with a molded body, locally by an electromagnetic wave irradiation means for irradiating electromagnetic waves are irradiated so that the convergence position of the electromagnetic waves in the depth direction of the voids is continuously displaced, radio wave absorption plastic material the softened or melted, the steps of Ru is deformed so as to fill a predetermined gap, the radio wave absorbent plastic material or a molded article stopping the irradiation of the radio wave, to maintain a deformed shape so as to fill the void state And a step of re-hardening with a method of processing in building construction . The electromagnetic wave irradiating means for locally irradiating an electromagnetic wave includes a radio wave radiator using a displaceable electromagnetic horn antenna, and performing displacement of the convergence position of the electromagnetic wave by displacing the radio wave radiator. The processing method in the construction construction of Claim 1. The electromagnetic wave irradiation means for locally irradiating the electromagnetic wave further includes at least one type of reflection plate selected from a displaceable parabolic reflection plate and a flat reflection plate, and the displacement of the convergence position of the electromagnetic wave is displaced. The processing method in the construction work according to claim 1, wherein the processing method is performed. The electromagnetic wave irradiating means for locally irradiating electromagnetic waves further includes a displaceable dielectric lens for converging electromagnetic waves, and the displacement of the electromagnetic wave converging position is performed by displacing the dielectric lens for converging electromagnetic waves. The processing method in the construction work of Claim 1 or Claim 3 characterized by the above-mentioned.

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