WO2012039382A1 - High frequency dielectric heating device for thermosetting plastic material, and method for molding thermosetting plastic - Google Patents
High frequency dielectric heating device for thermosetting plastic material, and method for molding thermosetting plastic Download PDFInfo
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- WO2012039382A1 WO2012039382A1 PCT/JP2011/071348 JP2011071348W WO2012039382A1 WO 2012039382 A1 WO2012039382 A1 WO 2012039382A1 JP 2011071348 W JP2011071348 W JP 2011071348W WO 2012039382 A1 WO2012039382 A1 WO 2012039382A1
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- thermosetting plastic
- mold
- temperature
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- high frequency
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/12—Dielectric heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/38—Heating or cooling
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
Definitions
- the present invention relates to a high-frequency dielectric heating device for a thermosetting plastic material, which forms a thermosetting plastic by curing a thermosetting plastic material into a predetermined shape by a dielectric heating effect by high frequency, and molding of the thermosetting plastic. Regarding the method.
- thermosetting plastic material As a method of curing a thermosetting plastic material by heating it in a mold for molding, the thermosetting plastic material is irradiated with microwaves, and the microscopic energy of the thermosetting plastic material that has polarity inside the molecule by the microwave energy.
- An apparatus using microwave dielectric heating that excites vibration to generate heat and accelerate curing is known.
- the entire thermosetting plastic material can be heated uniformly compared to the one that conducts and heats the thermosetting plastic material through a mold with a heater, preventing the occurrence of convection. The heating time can be shortened.
- thermosetting plastic material using microwaves frequency of about 0.3 GHz (gigahertz) to 300 GHz
- a dielectric heating device for a thermosetting plastic material using a megahertz to about 0.3 GHz has not been proposed.
- thermoplastic resin molding device using a rubber mold is described below. To the extent that Patent Document 1 can be found.
- a safer dielectric heating device with a relatively low external leakage can be constructed due to the straightness of the high frequency, and the penetration depth to the thermosetting plastic material is deeper.
- the dielectric heating apparatus which can be heated more uniformly and more rapidly to the center can be constituted.
- the object of the present invention is to actually construct a dielectric heating device that dielectrically heats a thermosetting plastic material by high-frequency irradiation, and enables safer, uniform and quick heating.
- An object of the present invention is to provide a high-frequency dielectric heating apparatus for a thermosetting plastic material that can be formed, and a method for molding the thermosetting plastic.
- the invention described in claim 1 is a high-frequency dielectric heating device for a thermosetting plastic material, and can accommodate a mold into which a thermosetting plastic material has been injected, and the mold accommodated therein.
- a high frequency generator that generates a high frequency so as to be able to be irradiated is provided, and the thermosetting plastic material is dielectrically heated by the high frequency irradiation of the mold.
- the inventions of claims 2 and 3 are the above-mentioned object, and in order to achieve the object of realizing higher quality polymerization, in the above-mentioned invention, a mold temperature sensor for measuring the temperature of the mold, A controller for determining the output of the high frequency based on a magnitude relationship comparing the temperature obtained from the mold temperature sensor and a mold temperature pattern set in advance according to the type of the thermosetting plastic material; Or the mold temperature sensor measures the temperature of the lower part of the mold.
- the inventions according to claims 4 and 5 provide the above object, and in order to achieve the object of enabling effective dielectric heating for the mold by taking measures against heat dissipation, etc.
- a heater is arranged in the part, or the heater is arranged in the lower part of the high-frequency generating part.
- the inventions of claims 6 and 7 are the above-mentioned object, and in order to achieve the object of performing better polymerization, in the above-mentioned invention, a generating part temperature sensor for measuring the temperature of the high-frequency generating part; And a control device for determining the output of the heater based on a magnitude relationship comparing a temperature obtained from the generation part temperature sensor and a generation part temperature pattern set in advance according to the type of the thermosetting plastic material.
- the generation part temperature pattern is equivalent to the mold temperature pattern, or is lower than the mold temperature pattern on average, or the generation part temperature sensor is located below the high frequency generation part. It is a lower temperature sensor which measures the temperature of this.
- the invention described in claim 8 further includes a heat-resistant resin material surrounding the mold in order to achieve the object of simply and efficiently performing higher quality polymerization. It is characterized by this.
- the invention according to claim 9 makes it possible to adjust the degree of temperature rise, to adjust the degree of temperature rise to an appropriate gentleness according to the type of thermosetting plastic material, etc.
- the invention is characterized in that the high frequency is irradiated in a pulsed manner.
- the invention described in claim 10 provides the above object in order to achieve the object of enabling efficient dielectric heating and physically realizing pulsed high frequency irradiation.
- a plurality of high frequency generators are provided.
- the invention described in claim 11 is the above-described invention, wherein the plurality of molds are continuously connected to the high-frequency generator. It further comprises a transport unit for transporting.
- the invention according to claim 12 is the above invention, wherein the mold is for an eyeglass lens. Is.
- a thirteenth aspect of the present invention is a method for molding a thermosetting plastic, wherein the mold into which the thermosetting plastic material is injected is accommodated in a high frequency generator that generates a high frequency. And a high frequency irradiation step of irradiating the mold with the high frequency in the high frequency generator, and the thermosetting plastic material is dielectrically heated by the high frequency irradiation of the mold in the high frequency irradiation step. And cured to obtain a thermosetting plastic molded product.
- the inventions of claims 14 and 15 are provided with a mold temperature sensor for measuring the temperature of the mold, in order to achieve the object of realizing higher quality polymerization in addition to the object.
- the high-frequency output is calculated based on the magnitude relationship in which the temperature obtained from the mold temperature sensor is compared with a mold temperature pattern set in advance according to the type of the thermosetting plastic material. And determining the temperature of the lower part of the mold with the mold temperature sensor.
- the invention described in claims 16 and 17 is the above invention, in order to achieve the object of enabling effective dielectric heating to the mold by taking measures against heat dissipation and the like.
- a heater is provided in the section, and the heater is operated in the high-frequency irradiation step, or the heater is disposed below the high-frequency generation section.
- the invention described in claims 18 and 19 is characterized in that a generator temperature sensor for measuring the temperature of the high-frequency generator is provided in the above invention in order to achieve the object of performing polymerization with better quality.
- the heater is based on a magnitude relationship in which a temperature obtained from the generation part temperature sensor is compared with a generation part temperature pattern set in advance according to the type of the thermosetting plastic material.
- the generation part temperature pattern is made equal to or lower than the mold temperature pattern on average, or the generation part temperature sensor is used to set the temperature of the lower part of the high frequency generation part. Or a lower temperature sensor to be measured.
- the invention according to claim 20 is the above invention, in order to achieve the object of performing simpler and more efficient polymerization in addition to the above object, in the above invention, in the housing step, the mold is applied to the heat resistant resin material. It is characterized by accommodating.
- the invention according to claim 21 makes it possible to adjust the degree of temperature rise, to adjust the degree of temperature rise to an appropriate gentleness according to the type of thermosetting plastic material, etc.
- the high frequency is irradiated in a pulse shape It is.
- the invention described in claim 22 is the above invention, in order to achieve the object of enabling efficient dielectric heating and physically realizing pulsed high frequency irradiation in addition to the above object.
- a plurality of high frequency generators are provided.
- the invention described in claim 23 is the above-described invention, wherein the plurality of molds are continuously connected to the high-frequency generator.
- the method further comprises a transporting step of transporting.
- thermosetting plastic molded product is a spectacle lens. It is characterized by.
- a mold into which a thermosetting plastic material is injected can be accommodated, and a high frequency generator that generates a high frequency so as to be able to irradiate the accommodated mold is provided.
- a high frequency generator that generates a high frequency so as to be able to irradiate the accommodated mold is provided.
- (A) is a schematic diagram of the high frequency dielectric heating apparatus which concerns on 1st form of this invention
- (b) is a schematic diagram of the high frequency dielectric heating apparatus which concerns on 3rd, 4th form of this invention.
- . 6 is a graph showing the relationship between the elapsed time from the start of high-frequency (microwave) irradiation and the mold outside temperature in Examples 1 to 4 (Comparative Example 1).
- (A) is a schematic diagram of the high frequency dielectric heating apparatus which concerns on the 5th form of this invention
- (b) is a graph which shows typically the target product temperature and target lower electrode temperature in (a).
- Example (alpha) and Example 5 target lower electrode temperature, furnace temperature, and high frequency electric power. It is a graph which shows the target product temperature of Example (beta) and Example 6, target lower electrode temperature, and high frequency electric power. It is a graph which shows the target product temperature of Example 7 and Example (gamma), target lower electrode temperature, furnace temperature, and high frequency electric power. It is a graph which shows the target product temperature of Example 7 and Example (delta), target lower electrode temperature, furnace temperature, and high frequency electric power.
- the high frequency dielectric heating apparatus 1 of the thermosetting plastic material which concerns on the 1st form of this invention is the thermosetting arrange
- the conveyance part 3 (a belt conveyor, a roller, etc.) which can convey continuously the mold M (matrix) containing a functional plastic material is provided.
- the high frequency generator 2 generates a high frequency electromagnetic wave and can be configured using various high frequency generators.
- the high frequency generator 2 includes a lower electrode 4 and an upper electrode 5 as electrodes, and is disposed so as to sandwich the transport unit 3.
- the high frequency is oscillated between the lower electrode 4 and the upper electrode 5, and the high frequency is irradiated to an object located between them, that is, a mold M containing a thermosetting plastic material.
- the high frequency means an electromagnetic wave having a frequency of about 3 MHz to 0.3 GHz. However, the frequency is set to about 3 MHz to 1 GHz including the quasi-microwave region, or the upper and lower limits of the frequency are set appropriately. Is possible.
- the mold M containing the thermosetting plastic material is transported into the high frequency generator 2 by the transport unit 3 (transport process), stays in the accommodated state (accommodation process), and receives high frequency irradiation for a predetermined time (high frequency) After the irradiation step), it is taken out from the high frequency generator 2 and appropriately sent to a stocker (not shown) (next conveyance step).
- the thermosetting plastic material and the mold M are directly vibrated and heated by the high frequency during high frequency irradiation, and are heated more uniformly in a shorter time than the conductive heating through the mold M by hot air from a conventional heater. Due to the penetration depth greater than that of microwaves, heating is performed more uniformly than when heating by conventional microwave irradiation.
- high-frequency irradiation supply of high-frequency to mold M and thermosetting plastic material
- a pulse form that emits a strong output intermittently, particularly with respect to the time transition of the output intensity. For example, irradiation is performed for 30 seconds at the maximum output, and then the output is stopped for 1 minute, and these are repeated.
- pulse-like output transitions include those that give a relatively strong output intermittently and maintain a relatively weak output during that time, and the magnitude of the strong or weak output changes with time. Some of them are included, and those whose strong output intervals change with time are also included.
- thermosetting plastic material in the mold M is polymerized and cured by receiving such dielectric heating or heat transfer from the mold M to become a thermosetting plastic, and the thermosetting plastic having a shape according to the mold M. A molded product will be obtained.
- a high-frequency dielectric heating device having a configuration in which a plurality of high-frequency generators 2 are provided (in multiple stages) can be exemplified.
- the high frequency can be applied in a pulsed manner by the high frequency generation unit 2 or movement between the high frequency generation unit 2. That is, if the mold M is in the high frequency generator 2, the high frequency hits, and if the mold M is between the high frequency generators 2, the high frequency does not hit. After irradiating the high frequency in the high frequency generation unit 2 in a pulsed manner, it is possible to move to the next high frequency generation unit 2 and apply the pulsed irradiation comprehensively.
- the third embodiment includes a high-frequency dielectric heating device 1a in which the electrode 4a and the electrode 5a are arranged along the transport unit 3 to be a high-frequency generation unit 2a. Due to the straight travel characteristics, almost all of the high frequency is output between the electrodes 4a and 5a even in such an arrangement.
- the electrode 4a and the electrode 5a are not disposed below the transport unit 3 (on the opposite side of the mold M) as shown in FIG. 1B, but above the transport unit 3 (on the mold M). You may arrange in the side.
- the high frequency dielectric heating apparatus 1b which arrange
- dielectric heating is performed in the box X as described above, if microwaves are used, distribution is uneven in the box X, and it is difficult to heat a plurality of molds M and thermosetting plastic materials in the same manner.
- any mold M or thermosetting plastic material can be heated equally, and the large penetration depth to the object,
- the mold M and the thermosetting plastic material can be uniformly dielectrically heated.
- the conveyance part 3 is abbreviate
- the fifth embodiment of the present invention shown in FIG. 3A is the same as the first embodiment. The difference from the first embodiment will be mainly described.
- a plate 6 made of silicon resin, which is a kind of heat-resistant resin, is disposed around the mold M.
- the high frequency generator 2 is arranged so as to come into contact.
- the plate 6 serves as a heat insulating material by surrounding the mold M.
- a fluororesin such as polytetrafluoroethylene may be employed instead of or in addition to the silicon resin.
- the plate 6 may surround the side surface of the mold M or only a part thereof, may cover only the upper side and / or the lower side, or may surround the whole. Further, the plate 6 is preferably in contact with the lower electrode 4 and / or the upper electrode 5 from the viewpoint of heat retention, but may be disposed away from one or both of them.
- the mold M can be accommodated in the plate 6 manually by an operator, or the high frequency generator 2 can be opened and closed, and the mold M accommodating portion (along the mold M) in the plate 6 inside thereof. You may carry out by conveyance accommodation parts, such as a robot hand which puts in / out the mold M with respect to a hole, a hollow, etc.).
- a heater 7 is incorporated in the lower electrode 4 which is the lower part of the high frequency generator 2.
- the heater 7 is a heating element that generates heat by itself, and a heating wire is used here.
- a heater 7 it can replace with a heating wire, or can employ
- a mold temperature sensor 8 that is in contact with the lower center of the mold M and measures the temperature of the contact point is installed at the lower part of the plate 6.
- a generator temperature sensor for measuring the temperature at the center of the lower electrode 4 and a lower electrode temperature sensor 9 as a lower temperature sensor are installed.
- the mold temperature sensor 9 may be installed only in one of the molds M, and the temperature may be used, or the temperature of a part or all of the molds M may be measured and the average of them. Temperature may be used.
- the mold temperature sensor 8 and the lower electrode temperature sensor 9 are arranged in the lower part from the viewpoint of suppressing the influence of high frequency and appropriately grasping the heat radiation to the surroundings, but are arranged other than the lower part of the upper electrode 5 and the like. Also good.
- the high frequency generator 2, the heater 7, the mold temperature sensor 8, and the lower electrode temperature sensor 9 are connected to a control device (not shown).
- the control device also includes a timer (not shown).
- the control device controls the high-frequency generator 2 so that the temperature of the mold M (product temperature) according to the heating time is reached, as shown by the solid line in FIG. That is, the control device compares the target product temperature obtained by applying the elapsed time indicated by the timer operated from the start of heating to the predetermined formula corresponding to FIG. 3B and the measured product temperature obtained from the mold temperature sensor 8. When the measured product temperature exceeds the target product temperature, the output of the high frequency generator 2 is lowered or stopped. When the measured product temperature falls below the target product temperature, the output of the high frequency generator 2 is increased.
- a line indicating the relationship between the heating time and the target product temperature (a graph of the target product temperature, which is a function with the heating time as a variable) is set to a predetermined pattern (mold temperature pattern).
- the high frequency generator 2 is controlled along
- the product temperature control can be variously changed as exemplified below.
- the output is further increased.
- the output is switched in multiple stages, such as further increasing the output.
- control is performed in the same manner as when the target product temperature is below.
- the output of the high frequency generator 2 is a function corresponding to the temperature difference between the target product temperature and the measured product temperature or the magnitude relationship between the target temperature and the measured product temperature.
- the target product temperature has a proportional relationship in which the product temperature is increased by an increment of the product temperature every predetermined unit heating time in the previous stage, and the constant temperature is maintained in the subsequent stage regardless of the heating time.
- the product temperature increment in the previous stage of the predetermined pattern is that the thermosetting plastic material to be heated is cured in a good quality state (there is no occurrence of striae, turbidity, chipping, etc.). It is set in consideration of the fact that the heating time is short and the heating target can be cured quickly.
- the product temperature increment may be switched once or multiple times, and in the subsequent stage, a heating time-target product temperature distribution that is constant on average, such as a sine wave or a rectangular wave, is obtained. You can do it. Further, the product temperature increment may be set in consideration of other factors.
- control device controls the heater 7 so that the temperature of the lower electrode according to the heating time is reached, as indicated by a dotted line in FIG. That is, the control device compares the target lower electrode temperature obtained from the elapsed heating time with the measured lower electrode temperature obtained from the lower electrode temperature sensor 9, and if the measured lower electrode temperature exceeds the target lower electrode temperature, the heater 7 When the output is lowered or stopped and the measured lower electrode temperature falls below the target lower electrode temperature, the output of the heater 7 is increased.
- the line indicating the relationship between the heating time and the target lower electrode temperature (the graph of the target lower electrode temperature, which is a function with the heating time as a variable) is set to be a specific pattern (the generating portion temperature pattern, Lower temperature pattern), the heater 7 is controlled along this pattern.
- the target lower electrode temperature (specific pattern) has a proportional relationship in which the temperature is increased by an increment of the lower electrode temperature every predetermined unit heating time in the previous stage, and is maintained at a constant temperature regardless of the heating time in the subsequent stage. It has become.
- the lower electrode temperature increment or the like in the previous stage of the specific pattern is set in the same manner as the product temperature increment or the like, but the time of this previous stage is preferably shorter than in the case of the target product temperature. Further, the temperature at the later stage of the specific pattern is preferably set lower than that at the target product temperature.
- heating by the heater 7 is performed at a high frequency by shortening the time of the previous stage (temperature raising stage) or lowering the set temperature of the subsequent stage (temperature maintaining stage). It can be auxiliary to heating (on average, lower to the same level or lower).
- the heating by the heater 7 may be larger than the heating by the high frequency in part as long as the heating by the heater 7 is equal to the high frequency heating or lower on average than the high frequency heating.
- the auxiliary heating by the heater 7 compensates for heat that escapes to the surroundings in the case of only high-frequency heating, but heating for curing is mainly performed by high-frequency.
- heat due to high frequency or the like seems to leak up and down.
- the temperature control based on the lower electrode temperature of the heater 7 has the same modification as the product temperature control. Further, as shown in FIG. 3B, the product temperature increment and the lower electrode temperature increment are not aligned, and the lower electrode temperature increment can be made smaller than the product temperature increment. Furthermore, the temperature control of the heater 7 can be performed based on the measured product temperature obtained from the mold temperature sensor 8, and in this case, the lower electrode temperature sensor 9 can be omitted.
- the high frequency generator 2 is configured using a high frequency generator, and a mold M containing a thermosetting plastic material is put into the high frequency generator 2 and irradiated with high frequencies under various settings.
- the mold M was a spectacle lens mold (diameter 83 mm (millimeter), center thickness 5 mm, frequency 0), and the thermosetting plastic material was a polyurethane molding monomer.
- a catalyst titanium-based catalyst or amine-based catalyst that promotes polymerization or curing of the monomer was mixed.
- Example 1 a high frequency of 70 MHz was generated with an interelectrode voltage of 4500 V (volts), an anode current of 0.36 A (amperes), and an interelectrode distance of 90 mm, and 30 mm from the lower electrode (high frequency generator 2).
- the mold M was placed at the position, and high frequency was continuously irradiated for 40 minutes.
- the catalyst concentration was 600 ppm (parts per million).
- Example 2 high frequency was continuously irradiated for 23 minutes under the same conditions as in Example 1 except for the following. That is, the anode current was 0.38 A, and the distance from the lower electrode of the mold M was 47 mm.
- Example 3 a high frequency of 70 MHz is generated in a pulse shape with an interelectrode voltage of 4500 V, an anode current of 0.45 A, and an interelectrode distance of 80 mm, and a mold M is arranged at a position of 30 mm from the lower electrode, Were intermittently irradiated for 120 minutes.
- the generation of the high frequency was made to repeat a cycle of stopping for 1 minute after irradiation for 30 seconds.
- the catalyst concentration was 300 ppm.
- Example 4 high frequency was intermittently irradiated for 75 minutes under the same conditions as in Example 1 except the following. That is, the catalyst concentration was 600 ppm.
- Comparative Example 1 instead of high frequency, the following microwave was continuously irradiated for 20 minutes. That is, the frequency was 2.45 GHz (2450 MHz) and the output was 560 W (watts).
- FIG. 2 shows the relationship between the elapsed time [min] from the start of irradiation under each condition and the outside temperature [° C.] of the mold M.
- Example 1 by continuously irradiating a high frequency wave for 40 minutes, the polyurethane molding monomer, which is a thermosetting plastic material, is cured in approximately 40 minutes (plus cooling time) to obtain a thermosetting plastic molded product.
- a transparent spectacle lens could be formed (indicated as A (excellent) by relative evaluation in the time column of [Table 1]).
- B good in the quality column of [Table 1].
- the temperature change outside the mold M under the conditions of Example 1 increased in proportion to the time, and the mold M at the start of 26 ° C. reached 216 ° C. after 40 minutes.
- Example 2 a transparent spectacle lens could be formed in approximately 23 minutes by continuously irradiating high frequency for 23 minutes (time A + (excellent)).
- time A + excellent
- Example 2 The temperature change outside the mold M under the conditions of Example 2 (FIG. 2) was the same as that of Example 1, but the temperature increased more rapidly, and the mold M at 26 ° C. at the start became 216 ° C. after 23 minutes. .
- Example 3 a transparent spectacle lens could be formed in approximately 120 minutes by intermittently irradiating high frequency for 120 minutes (time B). Even when the spectacle lens was formed repeatedly, almost no striae or edge defects were observed (quality A +).
- the temperature change outside the mold M under the conditions of Example 3 shows a relatively gentle rise, and averages 1 to 2 in 1 minute and a half (90 seconds), which is one cycle of pulsed irradiation.
- the temperature rise was relatively slow in the second half (after about 40 minutes). Note that FIG. 2 shows the time after 75 minutes.
- Example 4 a transparent spectacle lens could be formed in approximately 75 minutes by intermittently irradiating high frequency for 75 minutes (time B).
- time B When a spectacle lens was repeatedly formed, there was a slight turbidity in a part, but almost no striae or edge defects were observed (Quality A).
- the temperature change outside the mold M under the conditions of Example 4 (FIG. 2) is the same as that of Example 3, but the temperature rises relatively large, with an average temperature increase of 2 to 3 ° C. in one and a half minutes.
- the mold M at 26 ° C. at the start became 102 ° C. after 75 minutes.
- the temperature increased with the passage of time in the latter half as compared with Example 3.
- a spectacle lens could be formed in approximately 20 minutes by continuous microwave irradiation for 20 minutes (time A +).
- time A + the number of repeated formation of spectacle lenses
- the temperature change outside the mold M under the conditions of Comparative Example 1 (FIG. 2) increased to 154 ° C. more rapidly than Example 1 in the first 10 minutes, and then the same temperature was maintained. It exhibited 148 ° C after 20 minutes.
- the temperature distribution inside the mold M became non-uniform such that the center of the mold M became hotter than the others, and heating unevenness occurred.
- a spectacle lens as a polyurethane molded product by polymerizing a polyurethane molding monomer in dielectric heating using high frequency (Examples 1 to 4). Since the high frequency is higher in straightness than the microwave, the external leakage can be reduced and the irradiation location can be limited, and unlike the comparative example 1, it is possible to provide a temperature increase proportional to the elapsed time. Can be heated by irradiation. Furthermore, since the high-frequency penetration depth of the object is deeper than that of the microwave, it can penetrate deeper into the thermosetting plastic material and dielectrically heat it to the center. A gentle heating can provide a high quality and quick cure.
- the degree of temperature rise can be adjusted, and the temperature rise can be moderately gentle depending on the type of the thermosetting plastic material and the size of the mold M.
- the degree can be adjusted.
- the mold M itself and the thermosetting plastic material are heated at the time of strong output, and polymerization is promoted.
- the residual heat and the thermosetting plastic material / self-heating of the mold M are promoted. In this state, the rapid progress of polymerization is prevented, and the acceleration of temperature rise is moderately suppressed compared to the case of continuous irradiation, and the buffered polymerization is progressed.
- the quality of polymerization or thermosetting plastic Contributes to the improvement of quality.
- the degree of temperature rise can be adjusted, so that the balance between the quality of formation and time (reduction of time when quality is above the standard) is appropriate according to the situation, and the curing time is shortened. Can do.
- Example 5 was formed under the same conditions as in Example 1 above.
- the silicon resin plate 6 was arranged around the mold M.
- the high frequency generator 2 is controlled in accordance with the state (pattern P1, mold temperature pattern) indicated by “target product temperature” in FIG. 4, and the heater is determined in accordance with the state (pattern Q1, generator temperature pattern) indicated by “target lower electrode temperature”. 7 was controlled.
- the temperature increase in the previous stage of the pattern Q1 is a step-like increase of 5 ° C. every 20 minutes of heating time, but on average, it is equivalent to the temperature increase in the previous stage of the target product temperature.
- Example ⁇ was the same as Example 5, except that the heater 7 and the lower electrode temperature sensor 9 were omitted.
- Example ⁇ the same as Example 5, but a mold temperature sensor 8 arranged at the upper center of the mold M was formed.
- the pattern of “target lower electrode temperature” was made to be stepped up by 2.5 ° C. every 10 minutes of heating time (pattern Q2).
- Example 6 was the same as Example 5, except that the pattern of “target lower electrode temperature” was set to pattern Q2.
- Example 7 was formed in the same manner as Example 5, except that the pattern of “target product temperature” was changed to pattern P2 as shown in FIG.
- the initial target product temperature time 0 minutes
- the product temperature increment is slightly increased at 130 minutes / 96 ° C.
- the temperature raising stage is finished at 180 minutes / 140 ° C.
- Example ⁇ the same as Example 7, except that the plate 6 as a heat insulating material (heat resistant resin material) was omitted.
- Example ⁇ was formed in the same manner as Example 7, except that the pattern of “target product temperature” was changed to pattern P3 as shown in FIG.
- the initial target product temperature is 30 ° C.
- the product temperature increment is slightly increased at 90 minutes / 76 ° C.
- the temperature rising stage is finished at 150 minutes / 140 ° C.
- the “target product temperature” pattern P2 of Example 6 is also shown.
- the pattern of “target lower electrode temperature” was set to pattern Q3 shown in FIG.
- Examples ⁇ to ⁇ are examples of the first form described above, but may not be examples of the fifth form (comparative examples to the fifth form).
- Example ⁇ the high-frequency output is microscopically raised (below the target product temperature) or lowered (above the target product temperature), and has a sawtooth shape. Macroscopically, after initially rising to about 25 W, it rises along a proportional increase in the target product temperature, and when the target product temperature becomes constant (after stage), it becomes almost constant after the decrease.
- the high-frequency output has a period (approximately 30 to 120 minutes) that is substantially constant in the first half of the target product temperature rise (previous stage).
- Example 5 the high-frequency output is the same as that in Example ⁇ , but the power is reduced by about 20 W in almost the entire time.
- the furnace temperature in FIG. 4 is that in Example 5, but was almost the same in Example ⁇ .
- Example ⁇ is similar to that of Examples 1 and 2 above (Quality B). On the other hand, in the finish of Example 5, even when a spectacle lens was repeatedly formed, no striae or edge chipping was observed compared to Example 3, and transparency or polymerization uniformity was even better than Example 3. (Quality A ++).
- Such a quality difference is mainly caused by the presence or absence of the heater 7. That is, in Example ⁇ , since there is no heater 7, heating is performed with a high frequency up to the amount of heat radiation, and it is relatively difficult to perform heating of a gentle heating object necessary for uniform polymerization promotion.
- the heater 7 that operates auxiliary to the high-frequency heating is provided, the heat radiation can be effectively supplemented by the heating of the heater 7, and the high-frequency heating is heated correspondingly to the heating target. It is possible to concentrate in a moderate state of the output to promote extremely good polymerization.
- the polymerization time was about 240 minutes in both Examples 5 and ⁇ , and although not as much as in Examples 1 and 2, it was sufficiently realistic (speed B ⁇ ). Compared to a slight delay in speed, the improvement in quality is extremely large.
- the high frequency output is the same as in the example 5.
- the high-frequency output rises relatively rapidly (up to about 40 W in 5 minutes).
- the state in which the high frequency output is relatively high continues (around 30 W).
- the high frequency output is the same as in the fifth embodiment.
- a low-frequency output as low as about 20 W is maintained. Note that the rise of the high frequency output at the initial stage is gentler in the sixth embodiment than in the third embodiment.
- Such a difference is mainly caused by the arrangement of the mold temperature sensor 8. That is, in Example ⁇ , since the mold temperature sensor 8 is arranged so as to be able to measure the temperature at the upper center of the mold M, it is not possible to grasp the heating state and heat dissipation state of the mold M due to the high frequency, and the heating temperature is particularly high. In the first stage (first half), the high-frequency output becomes relatively large, and it becomes difficult to perform gentle high-frequency heating in the first half of the polymerization (quality B). On the other hand, in Example 6, since the mold temperature sensor 8 is disposed so as to be able to measure the temperature at the lower center of the mold M, it is possible to more accurately grasp the heating situation including heat dissipation from the surroundings such as below. A gentle high frequency heating can be carried out over the entire period including the first half of the polymerization (quality A ++).
- Example 7 the high frequency output is the same as in Example 5.
- Example ⁇ the high frequency output is the same as in the fifth example. Comparing these, Example 7 has a slightly higher output (about 3 W) in the first half of the previous stage and a lower output (about 5 W) in the latter stage than Example ⁇ . .
- the furnace temperature in FIG. 6 is that of Example 7, but was almost the same in Example ⁇ .
- Such an output difference is mainly caused by the presence or absence of the plate 6 as a heat insulating material. That is, in the seventh embodiment, since the plate 6 is disposed around the mold M, it is necessary to heat the plate 6 by an extra amount in the first half of the previous stage. Moreover, in Example 7, since heat can be held by the plate 6 and heat radiation can be suppressed, high-frequency heating can be reduced at a later stage. On the other hand, in Example ⁇ , since there is no plate 6, the high frequency output can be relatively suppressed in the first half of the previous stage, and the high frequency output needs to be relatively high in the subsequent stage. Even if extra heating is required in the first half of the previous stage of Example 7, the output is sufficiently low compared to Example ⁇ (FIG. 4, without heater 7), and heating for the output increase is It is thought that it is acting not on the mold M but on the plate 6.
- Example 7 the plate 6 as a heat insulating material is provided as in Example 7, the heat radiation from the mold M is made more gentle, and In combination with the heat retention, the high-frequency heating of the mold M can be made more gentle, and the quality can be further improved (quality A ++).
- the curing time can be shortened by about 30 minutes compared to the case of the pattern P1 (240 minutes).
- Example ⁇ (FIG. 7)
- the product temperature increment increases (the slope of the target product temperature graph becomes steeper) with respect to the high frequency output. Is similar to Example 7 (FIGS. 6 and 7).
- the initial rise of the high-frequency output is sharper than in Example 7.
- the polymerization time of Example ⁇ is 180 minutes, which is about the same as that of Examples 3 and 4 (speed B), and is shorter than the polymerization time of Example 7 (210 minutes, speed B ⁇ ). ing.
- the furnace temperature in FIG. 7 is that of Example ⁇ .
- This output difference is mainly caused by the difference in the target product temperature pattern. That is, in Example ⁇ , since the pattern P3 that reaches the later stage temperature (140 ° C.) earlier was used, the polymerization time was relatively fast and the quality was relatively poor. On the other hand, in Example 7, since the pattern P2 which reaches the later stage more gently according to the properties of the polymerized material, the polymerization time is relatively slow, but the quality is relatively excellent.
- the action on the object to be heated can be moderately moderated, and a spectacle lens with better quality can be formed (Example 7 for Example ⁇ ).
- the high frequency output can be matched with the high quality polymerization of the thermosetting plastic material.
- the product temperature increment or the like can be set so as to minimize the polymerization time in a range where the quality is higher than the standard, for example, depending on the type of the thermosetting plastic material.
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Abstract
Description
図1(a)に示すように、本発明の第1形態に係る熱硬化性プラスチック材料の高周波誘電加熱装置1は、高周波発生部2と、その内部を通過するように配置された、熱硬化性プラスチック材料入りのモールドM(母型)を連続して搬送可能な搬送部3(ベルトコンベアやローラ等)を備えている。 [First form]
As shown to Fig.1 (a), the high frequency
このような第1形態を変更した本発明の第2形態として、高周波発生部2を複数(多段に)設ける構成とした高周波誘電加熱装置を挙げることができる。このように高周波発生部2を複数とすると、加熱を効率良く行うことが可能で、連続的な搬送部3に適応させ易い。又、高周波発生部2ないしその間の移動により高周波をパルス状に適用することができる。即ち、モールドMが高周波発生部2内にあれば高周波が当たり、搬送により高周波発生部2間にあれば高周波が当たらず、よって搬送により高周波がパルス状に当たる。高周波発生部2内で高周波をパルス状に照射した後、次の高周波発生部2へ移動し、総合的にパルス状照射を施すことも可能である。 [Second form]
As a second embodiment of the present invention in which the first embodiment is changed, a high-frequency dielectric heating device having a configuration in which a plurality of high-
同様に、第3形態として、図1(b)に示すように、電極4a及び電極5aを、搬送部3に沿って配置して高周波発生部2aとする高周波誘電加熱装置1aが挙げられ、高周波の直進性により、高周波は、このような配置であっても殆ど全てが電極4aと電極5aの間において出力される。なお、搬送部3に沿った配置において、電極4a及び電極5aを、図1(b)のように搬送部3の下方(モールドMの反対側)ではなく、搬送部3の上方(モールドMの側)に配置しても良い。 [Third embodiment]
Similarly, as shown in FIG. 1B, the third embodiment includes a high-frequency
又、第4形態として、図1(c)に示すように、箱X内に高周波発生部2を配置して、複数のモールドMを並べて加熱する高周波誘電加熱装置1bを挙げることができる。このように箱X内で誘電加熱する場合、マイクロ波を利用すると、箱X内で分布にムラを生じ、複数のモールドMや熱硬化性プラスチック材料を同じように加熱することが困難であるが、高周波を利用すると、その直進性により、箱X内において均一に照射され、何れのモールドMないし熱硬化性プラスチック材料も同等に加熱することができるし、その物体に対する大きな浸透深さにより、それぞれのモールドM及び熱硬化性プラスチック材料を均一に誘電加熱することができる。なお、上記あるいは下記の各形態の変更例として、搬送部3を省略し、作業者によって手作業で、あるいはチャック等により自動的に高周波発生部2に加熱対象を出し入れすることを挙げることができる。 [Fourth form]
Moreover, as a 4th form, as shown in FIG.1 (c), the high frequency
図3(a)に示す本発明の第5形態も、第1形態と同様に成る。第1形態との相違を主に説明すると、高周波誘電加熱装置1cにおいて、モールドMの周囲には、耐熱性樹脂の一種のシリコン樹脂製のプレート6が配置されており、モールドMあるいはプレート6に接触するように、高周波発生部2が配置されている。 [Fifth embodiment]
The fifth embodiment of the present invention shown in FIG. 3A is the same as the first embodiment. The difference from the first embodiment will be mainly described. In the high-frequency
≪各構成等≫
上記第1形態において高周波発生装置を用いて高周波発生部2を構成し、熱硬化性プラスチック材料入りのモールドMを高周波発生部2に投入して、各種の設定のもと高周波を照射した。モールドMは眼鏡レンズ用の型(直径83mm(ミリメートル)・中心厚み5mm・度数0)とし、熱硬化性プラスチック材料はポリウレタン成形用モノマーとした。なお、モノマーの重合ないし硬化を促進する触媒(錫系触媒あるいはアミン系触媒)を混入した。 Examples 1 to 4 and Comparative Example 1
≪Each component etc.≫
In the first embodiment, the
以上の条件並びにその条件下での結果(硬化の質及び速さ)をまとめた表を次に[表1]として示す。又、各条件における照射開始時からの経過時間[分]とモールドMの外側温度[℃]との関係を、図2に示す。 ≪Polymerization etc.≫
A table summarizing the above conditions and the results (curing quality and speed) under these conditions is shown as [Table 1]. FIG. 2 shows the relationship between the elapsed time [min] from the start of irradiation under each condition and the outside temperature [° C.] of the mold M.
以上、高周波を利用した誘電加熱において、ポリウレタン成形用モノマーを重合し、ポリウレタン成形品としての眼鏡レンズを形成可能である(実施例1~4)。高周波はマイクロ波と比べて直進性が高いため、外部漏れの低減や照射箇所の限定を行えるし、比較例1と異なり経過時間に比例するような温度上昇を付与可能である等、効率的な照射による加熱を行える。更に、高周波はマイクロ波に比して物体に対する浸透深さが深いため、熱硬化性プラスチック材料に対してより深く浸透して中心まで誘電加熱することができ、モノマーの均一反応を促して、均一な加熱により、質が高く素早い硬化を提供することができる。 ≪Summary and discussion≫
As described above, it is possible to form a spectacle lens as a polyurethane molded product by polymerizing a polyurethane molding monomer in dielectric heating using high frequency (Examples 1 to 4). Since the high frequency is higher in straightness than the microwave, the external leakage can be reduced and the irradiation location can be limited, and unlike the comparative example 1, it is possible to provide a temperature increase proportional to the elapsed time. Can be heated by irradiation. Furthermore, since the high-frequency penetration depth of the object is deeper than that of the microwave, it can penetrate deeper into the thermosetting plastic material and dielectrically heat it to the center. A gentle heating can provide a high quality and quick cure.
≪各構成等≫
上記第5形態において、上記実施例1と同様の条件で実施例5を形成した。実施例5において、シリコン樹脂製のプレート6をモールドMの周囲に配置した。又、図4の「目標製品温度」で示す状態(パターンP1、モールド温度パターン)に従って高周波発生部2を制御し、「目標下部電極温度」で示す状態(パターンQ1、発生部温度パターン)に従ってヒーター7を制御した。なお、パターンQ1の前段階における昇温は、加熱時間20分経過毎に5℃上がるステップ状のものとしたが、平均的には目標製品温度の前段階の昇温と同等である。 [Examples 5 to 7 and Examples α to δ]
≪Each component etc.≫
In the fifth embodiment, Example 5 was formed under the same conditions as in Example 1 above. In Example 5, the
以上の実施例等における硬化状況をまとめた表を次に[表2]として示す。又、各実施例等における加熱時間[分]と高周波の電力[W]との関係を、図4~図7に示す。なお、下部電極4と上部電極5の間の温度である炉内温度[℃]の変化を併せて示す。図4~図7において、縦軸における数値は、電力[W]と温度[℃]で共通している。 ≪Polymerization etc.≫
A table summarizing the curing situation in the above examples and the like is shown as [Table 2]. In addition, the relationship between the heating time [minutes] and the high frequency power [W] in each of the examples is shown in FIGS. The change in the furnace temperature [° C.], which is the temperature between the
以上、装置を台や床に設置すること等により周囲へ生ずる熱の逃げに適切に対応すること等に鑑み、高周波加熱部にヒーター7を設けることで、極めて質の良好な眼鏡レンズを形成可能であり、更に高周波加熱部の下部にヒーター7を配置することで、より一層質を良好にすることができる(実施例αに対する実施例5)。 ≪Summary and discussion≫
As described above, it is possible to form an extremely good spectacle lens by providing the
2,2a 高周波発生部
6 プレート(保温材、耐熱性樹脂材)
7 ヒーター
8 モールド温度センサ
9 下部電極温度センサ(発生部温度センサ、下部温度センサ)
M モールド 1, 1a, 1b, 1c High-frequency
7
M mold
Claims (24)
- 熱硬化性プラスチック材料が注入されたモールドを収容可能であり、収容した当該モールドに対して照射可能に高周波を発生する高周波発生部を備えており、
前記モールドに対する前記高周波の照射により、前記熱硬化性プラスチック材料を誘電加熱する
ことを特徴とする熱硬化性プラスチック材料の高周波誘電加熱装置。 A mold into which a thermosetting plastic material is injected can be stored, and a high frequency generator that generates a high frequency so as to be able to irradiate the stored mold is provided.
A high-frequency dielectric heating apparatus for a thermosetting plastic material, wherein the thermosetting plastic material is dielectrically heated by the high-frequency irradiation of the mold. - 前記モールドの温度を測定するモールド温度センサと、
当該モールド温度センサから得た温度と、前記熱硬化性プラスチック材料の種類に応じて予め設定されたモールド温度パターンとを比較した大小関係に基づいて、前記高周波の出力を決定する制御装置と
を更に備えた
ことを特徴とする請求項1に記載の熱硬化性プラスチック材料の高周波誘電加熱装置。 A mold temperature sensor for measuring the temperature of the mold;
A controller for determining the output of the high frequency based on a magnitude relationship comparing the temperature obtained from the mold temperature sensor and a mold temperature pattern set in advance according to the type of the thermosetting plastic material; The high-frequency dielectric heating apparatus for thermosetting plastic material according to claim 1, further comprising: - 前記モールド温度センサは、前記モールドの下部の温度を測定する
ことを特徴とする請求項2に記載の熱硬化性プラスチック材料の高周波誘電加熱装置。 The high-frequency dielectric heating apparatus for a thermosetting plastic material according to claim 2, wherein the mold temperature sensor measures a temperature of a lower portion of the mold. - 前記高周波発生部に、ヒーターが配置されている
ことを特徴とする請求項1ないし請求項3の何れかに記載の熱硬化性プラスチック材料の高周波誘電加熱装置。 The high-frequency dielectric heating apparatus for thermosetting plastic material according to any one of claims 1 to 3, wherein a heater is disposed in the high-frequency generator. - 前記ヒーターは、前記高周波発生部の下部に配置されている
ことを特徴とする請求項4に記載の熱硬化性プラスチック材料の高周波誘電加熱装置。 The high-frequency dielectric heating apparatus for thermosetting plastic material according to claim 4, wherein the heater is disposed under the high-frequency generator. - 前記高周波発生部の温度を測定する発生部温度センサと、
当該発生部温度センサから得た温度と、前記熱硬化性プラスチック材料の種類に応じて予め設定された発生部温度パターンとを比較した大小関係に基づいて、前記ヒーターの出力を決定する制御装置と
を更に備えており、
前記発生部温度パターンは、前記モールド温度パターンと同等であり、あるいは前記モールド温度パターンより平均的に低くされている
ことを特徴とする請求項4又は請求項5に記載の熱硬化性プラスチック材料の高周波誘電加熱装置。 A generator temperature sensor for measuring the temperature of the high-frequency generator;
A control device for determining the output of the heater based on a magnitude relationship comparing a temperature obtained from the generation part temperature sensor and a generation part temperature pattern set in advance according to the type of the thermosetting plastic material; Is further provided,
6. The thermosetting plastic material according to claim 4, wherein the generation part temperature pattern is equal to the mold temperature pattern, or is lower than the mold temperature pattern on average. High frequency dielectric heating device. - 前記発生部温度センサは、前記高周波発生部の下部の温度を測定する下部温度センサである
ことを特徴とする請求項6に記載の熱硬化性プラスチック材料の高周波誘電加熱装置。 The high-frequency dielectric heating apparatus for thermosetting plastic material according to claim 6, wherein the generation unit temperature sensor is a lower temperature sensor that measures a temperature of a lower portion of the high-frequency generation unit. - 前記モールドを囲む耐熱性樹脂材
を更に備えた
ことを特徴とする請求項1ないし請求項7の何れかに記載の熱硬化性プラスチック材料の高周波誘電加熱装置。 The high-frequency dielectric heating device for thermosetting plastic material according to any one of claims 1 to 7, further comprising a heat-resistant resin material surrounding the mold. - 前記高周波をパルス状に照射する
ことを特徴とする請求項1ないし請求項8の何れかに記載の熱硬化性プラスチック材料の高周波誘電加熱装置。 9. The high-frequency dielectric heating apparatus for thermosetting plastic material according to claim 1, wherein the high-frequency wave is irradiated in a pulse shape. - 前記高周波発生部を複数設けた
ことを特徴とする請求項1ないし請求項9の何れかに記載の熱硬化性プラスチック材料の高周波誘電加熱装置。 The high frequency dielectric heating apparatus for thermosetting plastic material according to any one of claims 1 to 9, wherein a plurality of the high frequency generation portions are provided. - 前記高周波発生部へ複数の前記モールドを連続して搬送する搬送部を更に備えている
ことを特徴とする請求項1ないし請求項10の何れかに記載の熱硬化性プラスチック材料の高周波誘電加熱装置。 The high-frequency dielectric heating device for thermosetting plastic material according to any one of claims 1 to 10, further comprising a transport unit that continuously transports the plurality of molds to the high-frequency generation unit. . - 前記モールドは、眼鏡レンズ用である
ことを特徴とする請求項1ないし請求項11の何れかに記載の熱硬化性プラスチック材料の高周波誘電加熱装置。 12. The high-frequency dielectric heating device for thermosetting plastic material according to claim 1, wherein the mold is for eyeglass lenses. - 熱硬化性プラスチック材料が注入されたモールドを、高周波を発生する高周波発生部に収容する収容工程と、
前記高周波発生部において前記モールドに対して前記高周波を照射する高周波照射工程
を備えており、
前記高周波照射工程における前記モールドへの前記高周波の照射により、前記熱硬化性プラスチック材料を誘電加熱して硬化させ、熱硬化性プラスチック成形品を得る
ことを特徴とする熱硬化性プラスチックの成形方法。 A housing step of housing the mold infused with the thermosetting plastic material in a high-frequency generator that generates a high frequency;
A high frequency irradiation step of irradiating the mold with the high frequency in the high frequency generator;
A thermosetting plastic molding method, wherein the thermosetting plastic material is dielectrically heated and cured by irradiating the mold with the high frequency in the high frequency irradiation step to obtain a thermosetting plastic molded product. - 前記モールドの温度を測定するモールド温度センサを設け、
前記高周波照射工程において、当該モールド温度センサから得た温度と、前記熱硬化性プラスチック材料の種類に応じて予め設定されたモールド温度パターンとを比較した大小関係に基づいて、前記高周波の出力を決定する
ことを特徴とする請求項13に記載の熱硬化性プラスチックの成形方法。 A mold temperature sensor for measuring the temperature of the mold is provided,
In the high frequency irradiation step, the output of the high frequency is determined based on a magnitude relationship comparing the temperature obtained from the mold temperature sensor and a mold temperature pattern set in advance according to the type of the thermosetting plastic material. The method for molding a thermosetting plastic according to claim 13. - 前記モールド温度センサは、前記モールドの下部の温度を測定する
ことを特徴とする請求項14に記載の熱硬化性プラスチックの成形方法。 The method of molding a thermosetting plastic according to claim 14, wherein the mold temperature sensor measures a temperature of a lower portion of the mold. - 前記高周波発生部に、ヒーターを設け、
前記高周波照射工程において、当該ヒーターを作動させる
ことを特徴とする請求項13ないし請求項15の何れかに記載の熱硬化性プラスチックの成形方法。 A heater is provided in the high frequency generator,
The method for molding a thermosetting plastic according to any one of claims 13 to 15, wherein the heater is operated in the high-frequency irradiation step. - 前記ヒーターは、前記高周波発生部の下部に配置されている
ことを特徴とする請求項16に記載の熱硬化性プラスチックの成形方法。 The thermosetting plastic molding method according to claim 16, wherein the heater is disposed below the high-frequency generator. - 前記高周波発生部の温度を測定する発生部温度センサを設け、
前記高周波照射工程において、当該発生部温度センサから得た温度と、前記熱硬化性プラスチック材料の種類に応じて予め設定された発生部温度パターンとを比較した大小関係に基づいて、前記ヒーターの出力を決定し、
前記発生部温度パターンを、前記モールド温度パターンと同等とし、あるいは前記モールド温度パターンより平均的に低くする
ことを特徴とする請求項16又は請求項17に記載の熱硬化性プラスチックの成形方法。 A generator temperature sensor for measuring the temperature of the high frequency generator is provided,
In the high-frequency irradiation step, the output of the heater is based on the magnitude relationship comparing the temperature obtained from the generating part temperature sensor and the generating part temperature pattern set in advance according to the type of the thermosetting plastic material. Decide
The thermosetting plastic molding method according to claim 16 or 17, wherein the generation part temperature pattern is equal to or lower than the mold temperature pattern on average. - 前記発生部温度センサは、前記高周波発生部の下部の温度を測定する下部温度センサである
ことを特徴とする請求項18に記載の熱硬化性プラスチックの成形方法。 The thermosetting plastic molding method according to claim 18, wherein the generator temperature sensor is a lower temperature sensor that measures a temperature of a lower portion of the high frequency generator. - 前記収容行程において、耐熱性樹脂材に前記モールドを収容する
ことを特徴とする請求項13ないし請求項19の何れかに記載の熱硬化性プラスチックの成形方法。 The method for molding a thermosetting plastic according to any one of claims 13 to 19, wherein the mold is housed in a heat resistant resin material in the housing step. - 前記高周波照射工程において、前記高周波をパルス状に照射する
ことを特徴とする請求項13ないし請求項20の何れかに記載の熱硬化性プラスチックの成形方法。 21. The method for molding a thermosetting plastic according to claim 13, wherein, in the high frequency irradiation step, the high frequency is irradiated in a pulse shape. - 前記高周波発生部を複数設けた
ことを特徴とする請求項13ないし請求項21の何れかに記載の熱硬化性プラスチックの成形方法。 The method for molding a thermosetting plastic according to any one of claims 13 to 21, wherein a plurality of the high-frequency generators are provided. - 前記高周波発生部へ複数の前記モールドを連続して搬送する搬送工程を更に備えている
ことを特徴とする請求項13ないし請求項22の何れかに記載の熱硬化性プラスチックの成形方法。 The thermosetting plastic molding method according to any one of claims 13 to 22, further comprising a transporting step of continuously transporting the plurality of molds to the high-frequency generating unit. - 前記熱硬化性プラスチック成形品は、眼鏡レンズである
ことを特徴とする請求項13ないし請求項23の何れかに記載の熱硬化性プラスチックの成形方法。 The method for molding a thermosetting plastic according to any one of claims 13 to 23, wherein the thermosetting plastic molded product is a spectacle lens.
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CN201180044765.XA CN103108735B (en) | 2010-09-21 | 2011-09-20 | The high-frequency induction heating apparatus of thermoset plastic material and the forming method of thermosetting plastics |
KR1020137010125A KR101819066B1 (en) | 2010-09-21 | 2011-09-20 | High frequency dielectric heating device for thermosetting plastic material, and method for molding thermosetting plastic |
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JP (1) | JP5785042B2 (en) |
KR (1) | KR101819066B1 (en) |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014141033A (en) * | 2013-01-24 | 2014-08-07 | Hoya Corp | Method for manufacturing a plastic lens |
US20160046813A1 (en) * | 2013-11-06 | 2016-02-18 | Sekisui Chemical Co., Ltd. | Method for manufacturing cured film, method for manufacturing electronic component, and electronic component |
Families Citing this family (4)
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CN110719657B (en) * | 2019-11-05 | 2024-04-09 | 贵州师范学院 | Microwave uniform heating device and method for plastics |
JP7175507B2 (en) * | 2019-11-22 | 2022-11-21 | 株式会社micro-AMS | Dielectric heating molding apparatus and dielectric heating molding method |
CN112153768B (en) * | 2020-10-12 | 2022-09-09 | 哈尔滨理工大学 | Electromagnetic induction heating method for thermosetting molding of carbon fiber reinforced composite material |
JP7450228B2 (en) | 2021-09-27 | 2024-03-15 | ヒロセ補強土株式会社 | Core material for small diameter cast-in-place piles |
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2011
- 2011-09-20 WO PCT/JP2011/071348 patent/WO2012039382A1/en active Application Filing
- 2011-09-20 JP JP2011204667A patent/JP5785042B2/en active Active
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JPS5210365A (en) * | 1975-07-15 | 1977-01-26 | Matsushita Electric Ind Co Ltd | Method of molding thermosetting resin |
JPH07112447A (en) * | 1993-10-19 | 1995-05-02 | Canon Inc | Forming of heat-setting resin |
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JP2014141033A (en) * | 2013-01-24 | 2014-08-07 | Hoya Corp | Method for manufacturing a plastic lens |
US20160046813A1 (en) * | 2013-11-06 | 2016-02-18 | Sekisui Chemical Co., Ltd. | Method for manufacturing cured film, method for manufacturing electronic component, and electronic component |
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JP5785042B2 (en) | 2015-09-24 |
KR20130066688A (en) | 2013-06-20 |
CN103108735B (en) | 2015-09-09 |
JP2012086560A (en) | 2012-05-10 |
KR101819066B1 (en) | 2018-01-16 |
CN103108735A (en) | 2013-05-15 |
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