WO2010047268A1 - Resin forming apparatus and resin forming method - Google Patents

Abstract

A resin forming apparatus (1) has a forming die (6) composed of a rubber, a light source (2) which emits light including a wavelength region of 0.78-2μm, and a reflector (3) composed of many reflecting surfaces (31).  In the resin forming apparatus (1), at the time of distributing light to a target irradiation position (G) by fixing the light source (2) and the reflector (3), the light source (2) and the reflector (3) are integrally rotated and an irradiation range (E) is changed in a manner of drawing a circle with respect to the center of the target irradiation position (G), where the irradiation range (E) is the range where the reflection center axis line of light reflected by each reflecting surface (31) reaches the target irradiation position (G), and a thermoplastic resin (8) in the forming die (6) is heated.

Description

Resin molding apparatus and resin molding method

The present invention relates to a resin molding apparatus and a resin molding method configured to distribute light emitted from a light source by a reflector, guide the light to a rubber mold, and heat a thermoplastic resin in the mold.

There are various types of lamps configured to heat an object to be heated using light (electromagnetic waves).
For example, there is a method in which a plurality of straight tube type lamps are arranged side by side and light is irradiated uniformly over a wide range. However, according to this method, the use efficiency of light is low because the depth of the reflector disposed behind the lamp is shallow and the lamp itself becomes an obstacle. For this reason, enormous power is consumed, and the light intensity is insufficient for irradiation at a relatively long distance.

On the other hand, there is a method in which a single lamp type (point light source) lamp is arranged and a substantially uniform light distribution is formed by the structural design of the reflecting mirror. In this method, a reflecting mirror having a curved reflecting surface formed in a bowl shape or a combination of a number of minute flat reflecting surfaces in a bowl shape is used. By designing the light direction, a substantially uniform light distribution can be obtained in a desired irradiation range. As a result, the light utilization efficiency can be increased, and the shortage of light intensity is eliminated even when long-distance irradiation is performed.
However, when a single-lamp lamp is used, the shape of a light source such as a filament is projected onto an object to be heated by a reflecting mirror, thereby forming a portion that is locally heated significantly. Therefore, it is not sufficient for heating the object to be heated substantially uniformly. In addition, when the shape of the object to be heated is different, the part to be heated locally changes, and it is difficult to use the object to be heated with various shapes.

Further, in Patent Document 1, in order to uniformly heat a semiconductor wafer to be heated, light from a light source is collected by a reflecting mirror, and light from the reflecting mirror is focused on a semiconductor wafer via a deflector. A light heating device is disclosed that irradiates and drives a deflector to scan the wafer surface with the focused light. However, in Japanese Patent Laid-Open No. 2004-228620, spot-concentrated focused light is scanned at high speed to reduce light irradiation unevenness. For this reason, the configuration of the apparatus for performing high-speed scanning is complicated.

Japanese Utility Model Publication No. 5-63043

The present invention has been made in view of such conventional problems, and can selectively heat a thermoplastic resin in a mold compared to a rubber mold. An object of the present invention is to provide a resin molding apparatus and a resin molding method capable of making the heating temperature uniform in each part of the plastic resin.

According to a first aspect of the present invention, there is provided a rubber mold having a cavity for filling a thermoplastic resin, a light source that emits light including a wavelength region of 0.78 to 2 μm, and light emitted from the light source. A reflector for distributing light and guiding it to the mold,
The reflector has a reflecting surface formed in a bowl shape, and is configured to distribute light emitted from the light source by the reflecting surface to a target irradiation position at a predetermined distance from the light source.
When the light source and the reflector are fixed and light is distributed to the target irradiation position, the light source and the reflector are defined as a range in which the light reflected by the reflecting surface reaches the target irradiation position. , Or by rotating the reflector with the light source fixed, the irradiation range is changed so as to draw a circle with respect to the target irradiation position, and the target irradiation is performed. In the resin molding apparatus, the thermoplastic resin filled in the cavity is irradiated with light from the surface of the molding die arranged around the position to heat the thermoplastic resin.

The resin molding apparatus according to the present invention uses a single-lamp lamp using a light source and a reflector when forming a resin molded product made of a thermoplastic resin using a rubber mold, and appropriately applies a light irradiation range. By changing the temperature, the heating temperature at each portion of the thermoplastic resin in the mold can be made uniform.
In molding a resin molded product, a thermoplastic resin is filled in a cavity of a rubber mold. At the time of filling, light including a wavelength region of 0.78 to 2 μm emitted from a light source is distributed by a reflector and irradiated to the thermoplastic resin in the cavity from the surface of the mold. At this time, the thermoplastic resin can be heated more than the rubber mold because of the difference in physical properties between the rubber and the thermoplastic resin constituting the mold.

Thereby, the temperature of the thermoplastic resin in the cavity can be maintained higher than the temperature of the rubber mold until the filling of the thermoplastic resin into the cavity is completed. Therefore, it is possible to selectively heat the thermoplastic resin in the cavity with respect to the rubber mold, and it is possible to prevent poor filling of the thermoplastic resin in the cavity and obtain a good resin molded product. be able to.

Note that the light (electromagnetic wave) irradiated to the thermoplastic resin through the mold may include not only light in the wavelength region of 0.78 to 2 μm but also light in other regions. In this case, it is preferable that the light irradiated to the thermoplastic resin through the mold includes a larger amount of light in a region having a wavelength of 0.78 to 2 μm than light in other regions.

In the resin molding apparatus of the present invention, a reflector having a structure in which a reflecting surface is formed in a bowl shape and light is distributed substantially uniformly to a target irradiation position is used. Then, the light irradiation range is changed so as to draw a circle with respect to the target irradiation position by rotating the light source and the reflector integrally or by rotating the reflector while fixing the light source. Thereby, it can prevent that the site | part which is heated remarkably locally on the thermoplastic resin in a shaping | molding die by projecting the shape of a light source to a target irradiation position with a reflector.

In addition, since the concentration of the high light intensity portion does not occur at the target irradiation position, the heating temperature is uniformized not only in the thermoplastic resin in the specific-shaped mold but also in the various portions of the thermoplastic resin. be able to. Furthermore, the resin molding apparatus of the present invention has a simple configuration in which the light source and the reflector are rotated, or only the reflector is rotated.

Therefore, according to the resin molding apparatus of the present invention, it is possible to selectively heat the thermoplastic resin in the molding die as compared with the rubber molding die. The heating temperature at the site can be made uniform.

The reason why the thermoplastic resin can be selectively heated by the light including the wavelength region of 0.78 to 2 μm (particularly near infrared rays) as compared with the rubber mold is as follows. Think.
That is, light including a wavelength region of 0.78 to 2 μm irradiated on the surface of the rubber mold is absorbed by the thermoplastic resin, whereas the light reflected on the mold surface or transmitted through the mold is large. We think that there is much ratio to be done. For this reason, it is considered that the energy of light including a wavelength region of 0.78 to 2 μm is preferentially absorbed by the thermoplastic resin, and the thermoplastic resin can be selectively heated.

According to a second aspect of the present invention, there is provided a rubber mold having a cavity for filling a thermoplastic resin, a light source that emits light including a wavelength region of 0.78 to 2 μm, and light emitted from the light source. A reflector for distributing and reflecting light, and a relay reflector for further reflecting the light reflected from the reflector and guiding it to the mold,
The reflector has a reflective surface formed in a bowl shape, and is configured to distribute light emitted from the light source by the reflective surface to the relay reflector at a predetermined distance from the light source.
The relay reflector is configured to reflect light received from the reflector to a target irradiation position at a predetermined distance from the relay reflector,
When the light source, the reflector, and the relay reflector are fixed and light is distributed to the target irradiation position, the range in which the light reflected by the relay reflector reaches the target irradiation position is set as the irradiation range By rotating the relay reflector in a state where the light source and the reflector are fixed, the irradiation range is changed to draw a circle with respect to the target irradiation position, and around the target irradiation position In the resin molding apparatus, the thermoplastic resin filled in the cavity is irradiated with light from the surface of the molding die arranged on the surface to heat the thermoplastic resin.

The resin molding apparatus according to the present invention uses a single-lamp lamp using a light source and a reflector and a relay reflector in molding a resin molded product made of a thermoplastic resin using a rubber mold. The light irradiation range can be appropriately changed more easily, and the heating temperature at each part of the thermoplastic resin in the mold can be made uniform.
In molding a resin molded product, a thermoplastic resin is filled in a cavity of a rubber mold. At the time of filling, light including a wavelength region of 0.78 to 2 μm emitted from the light source is distributed by the reflector and the relay reflector, and irradiated to the thermoplastic resin in the cavity from the surface of the mold. . At this time, the thermoplastic resin can be heated more than the rubber mold because of the difference in physical properties between the rubber and the thermoplastic resin constituting the mold.

Thereby, the temperature of the thermoplastic resin in the cavity can be maintained higher than the temperature of the rubber mold until the filling of the thermoplastic resin into the cavity is completed. Therefore, it is possible to selectively heat the thermoplastic resin in the cavity with respect to the rubber mold, and it is possible to prevent poor filling of the thermoplastic resin in the cavity and obtain a good resin molded product. be able to.

In the resin molding apparatus of the present invention, the reflector is formed in a bowl shape to distribute light substantially uniformly to the target irradiation position, and the relay reflector that reflects the light received from the reflector to the target irradiation position. Is used. Then, by rotating the relay reflecting mirror with the light source and the reflector fixed, the light irradiation range is changed to draw a circle with respect to the target irradiation position. Thereby, it can prevent that the site | part which is heated remarkably locally on the thermoplastic resin in a shaping | molding die by projecting the shape of a light source to a target irradiation position with a reflector.

In the present invention, since the relay reflecting mirror is rotated, it is not particularly necessary to rotate the light source, and it is possible to prevent the light source from being deteriorated due to vibration or the like when rotating. In addition, since the relay reflecting mirror that is lightweight and does not have wiring or the like is configured to rotate, it is possible to easily drive the rotating component.
In addition, since the concentration of the high light intensity portion does not occur at the target irradiation position, the heating temperature is uniformized not only in the thermoplastic resin in the specific-shaped mold but also in the various portions of the thermoplastic resin. be able to.

Therefore, even with the resin molding apparatus of the present invention, the thermoplastic resin in the mold can be selectively heated compared to the rubber mold, and each part of the thermoplastic resin can be obtained by a simple apparatus configuration. The heating temperature can be made uniform.

The reason why the thermoplastic resin can be selectively heated by the light (particularly near infrared rays) including the wavelength region of 0.78 to 2 μm as compared with the rubber mold is the first invention. Think the same way.

According to a third aspect of the present invention, there is provided a rubber mold having a cavity for filling a thermoplastic resin, a light source that emits light including a wavelength region of 0.78 to 2 μm, and light emitted from the light source. Using a resin molding apparatus having a reflector for distributing light and guiding it to the mold,
The reflector has a reflection surface formed in a bowl shape, and is configured to distribute light emitted from the light source by the reflection surface to a target irradiation position at a predetermined distance from the light source,
When the light source and the reflector are fixed and light is distributed to the target irradiation position, the light source and the reflector are defined as a range in which the light reflected by the reflecting surface reaches the target irradiation position. , Or by rotating the reflector while fixing the light source, the irradiation range is changed to draw a circle with respect to the target irradiation position, and the target irradiation position In the resin molding method, the thermoplastic resin filled in the cavity is irradiated with light from the surface of the molding die arranged in the periphery of the mold to heat the thermoplastic resin.

In the resin molding method of the present invention, a resin molded product can be obtained by utilizing the characteristics of a resin molding apparatus that can make the heating temperature of the thermoplastic resin uniform.
Therefore, according to the resin molding method of the present invention, the thermoplastic resin in the mold can be selectively heated compared to the rubber mold, and the heating temperature of each part in the thermoplastic resin is made uniform. Therefore, an excellent quality resin molded product can be obtained.

According to a fourth aspect of the present invention, there is provided a rubber mold that forms a cavity for filling a thermoplastic resin, a light source that emits light including a wavelength region of 0.78 to 2 μm, and light emitted from the light source. Using a resin molding apparatus having a reflector that distributes and reflects light, and a relay reflector for further reflecting the light reflected from the reflector and guiding it to the mold,
The reflector has a reflection surface formed in a bowl shape, and is configured to distribute light emitted from the light source by the reflection surface to the relay reflector at a predetermined distance from the light source.
The relay reflector is configured to reflect the light received from the reflector to a target irradiation position at a predetermined distance from the relay reflector,
When the light source, the reflector, and the relay reflector are fixed and light is distributed to the target irradiation position, the range in which the light reflected by the relay reflector reaches the target irradiation position is set as the irradiation range By rotating the relay reflector in a state where the light source and the reflector are fixed, the irradiation range is changed to draw a circle with respect to the target irradiation position, and around the target irradiation position In the resin molding method, the thermoplastic resin filled in the cavity is irradiated with light from the surface of the molding die arranged on the surface to heat the thermoplastic resin.

Also in the resin molding method of the present invention, a resin molded product can be obtained by utilizing the characteristics of a resin molding apparatus that can make the heating temperature of the thermoplastic resin uniform.
Therefore, even with the resin molding method of the present invention, the thermoplastic resin in the mold can be selectively heated compared to the rubber mold, and the heating temperature of each part in the thermoplastic resin can be made uniform. As a result, an excellent quality resin molded product can be obtained.

FIG. 3 is an explanatory view showing a resin molding apparatus in Example 1. FIG. 3 is an explanatory diagram showing a halogen heater in the first embodiment. Explanatory drawing which shows the movement irradiation range of the light in the target irradiation position by the resin molding apparatus in Example 1. FIG. FIG. 3 is an explanatory diagram illustrating a result of a simulation of a light distribution state of a halogen heater in Example 1. The graph which shows the light intensity of each site | part in a target irradiation position about the halogen heater of FIG. FIG. 3 is an explanatory diagram showing a result of a simulation of a light distribution state of another halogen heater in Example 1. The graph which shows the light intensity of each site | part in a target irradiation position about the halogen heater of FIG. Explanatory drawing which shows the other resin molding apparatus in Example 1. FIG. 3 is a graph showing the light transmittance of silicone rubber in Example 1. FIG. Explanatory drawing which shows the resin molding apparatus in Example 2. FIG. Explanatory drawing which shows the resin molding apparatus of the state in which the relay reflecting mirror in Example 2 rotates. Explanatory drawing which shows the resin molding apparatus of the state in which the relay reflecting mirror in Example 2 rotates. Explanatory drawing which shows typically a relay reflecting mirror in Example 2. FIG. The graph which shows the result of having measured the temperature in each site | part of a thermoplastic resin about the comparison 1 of the confirmation test 1. FIG. The graph which shows the result of having measured the temperature in each site | part of a thermoplastic resin about the invention 5 of the confirmation test 1. FIG. The graph which shows the result of having measured the temperature in each site | part of a thermoplastic resin about the invention 9 of the confirmation test 1. FIG. The graph which shows the result of having measured the temperature in each site | part of a thermoplastic resin about the comparison 2 of the confirmation test 2. FIG. The graph which shows the result of having measured the temperature in each site | part of a thermoplastic resin about the invention 13 of the confirmation test 2. FIG.

A preferred embodiment in the first to fourth inventions described above will be described.
In the first to fourth inventions, the circle drawn by the irradiation range is not necessarily a perfect circle, and may be a circle such as an ellipse. However, in order to simplify the apparatus configuration, the irradiation range is preferably changed in a perfect circular orbit. Further, the irradiation range can be turned while rotating the irradiation range by devising the driving means (it can be changed in a planetary orbit).
Further, the reflector can have a bowl shape that forms a circular irradiation range.

In the first and third inventions, the light source and the reflector can be used not only as one set but also as a set. In the second and fourth inventions, the light source, the reflector, and the relay reflector can be used not only as one set but also as a set. That is, depending on the shape of the molded product (or cavity), it may be preferable to irradiate light from both sides or from the top, bottom, left, and right.

The thermoplastic resin is preferably an amorphous thermoplastic resin.
By the way, the cooling rate of the thermoplastic resin is slower than that of the mold because the mold is made of rubber. Therefore, the crystallinity of the thermoplastic resin may increase during cooling, which may reduce the dimensional accuracy of the resin molded product or the impact resistance of the resin molded product. On the other hand, by making the thermoplastic resin an amorphous thermoplastic resin, it is possible to prevent a decrease in dimensional accuracy and a decrease in impact resistance of the resin molded product.

Examples of amorphous thermoplastic resins include styrene resins such as styrene / acrylonitrile copolymers, styrene / maleic anhydride copolymers, styrene / methyl methacrylate copolymers, and ABS resins (acrylonitrile / butadiene / styrene resins). ), AES resin (acrylonitrile, ethylene-propylene-diene, styrene resin), ASA resin (acrylate, styrene, acrylonitrile resin), or other rubber-modified thermoplastic resins, or polymethyl methacrylate, polycarbonate resin (PC), PC / rubber A modified thermoplastic resin alloy or the like can be used. Among these, it is particularly preferable to use a rubber-modified thermoplastic resin.

The rubber-modified thermoplastic resin is not particularly limited, but is preferably one containing one or more polymers obtained by graft polymerization of vinyl monomers in the presence of a rubbery polymer.
The rubbery polymer is not particularly limited, but polybutadiene, butadiene / styrene copolymer, butadiene / acrylonitrile copolymer, ethylene / propylene copolymer, ethylene / propylene / non-conjugated diene copolymer, ethylene / butene. -1 copolymer, ethylene / butene-1 / non-conjugated diene copolymer, acrylic rubber, silicone rubber, and the like. These can be used alone or in combination of two or more.

As the rubber polymer, polybutadiene, butadiene / styrene copolymer, ethylene / propylene copolymer, ethylene / propylene / nonconjugated diene copolymer, acrylic rubber is preferably used, and the rubber-modified thermoplastic is used. As the resin, for example, ABS resin, AES resin, ASA resin or the like can be used. Among these, it is more preferable to use an ABS resin.

The mold is preferably made of silicone rubber.
In this case, the mold can be easily produced, and the thermoplastic resin can be selectively heated by the light including the wavelength region of 0.78 to 2 μm with little heating of the mold.
The hardness of the silicone rubber is preferably 25 to 80 in JIS-A standard measurement.

In the first invention, the light source is at a position offset with respect to a rotation center axis for integrally rotating the light source and the reflector, and the light source and the reflector are The irradiation range can be changed so as to draw a circle with respect to the target irradiation position by integrally rotating around the moving center axis.
In this case, it is easy to integrally rotate the light source and the reflector, and the resin molding apparatus can be configured easily.

In the second aspect of the invention, the relay reflector has a light distribution direction reflected by the reflecting surface thereof in a direction inclined with respect to a rotation center axis for rotating the relay reflector, By rotating the relay reflecting mirror around the rotation center axis, the irradiation range can be changed to draw a circle with respect to the target irradiation position.
In this case, it is easy to rotate the relay reflecting mirror, and the resin molding apparatus can be configured easily.

The relay reflector may be configured such that the tilt angle in the reflection light distribution direction can be changed by adjusting a screw with respect to the rotating main body rotating around the rotation center axis. it can.
In this case, the inclination angle of the relay reflector can be easily changed, and the turning diameter of the irradiation range to be changed so as to draw the circle can be easily adjusted.

The center in the irradiation range moves on a circular orbit around the center at the target irradiation position, and the diameter B of the circular orbit is 0.2A ≦ B where A is the maximum outer diameter of the irradiation range. It is preferable to have a relationship of ≦ 2A.
In this case, in the irradiation range in which light is irradiated to the target irradiation position, it is easy to avoid the concentration of locally significantly heated parts on the thermoplastic resin in the mold by direct irradiation from the light source. it can.

Further, the reflecting surface in the reflector has a multistage structure in which a large number of flat reflecting surfaces are combined or a continuous curved surface structure composed of one continuous curved reflecting surface, and the irradiation range is: The reflection central axes of light reflected by a large number of flat reflecting surfaces are within the range where the light reflecting central axes reach the target irradiation position, or the light reflecting central axes of a large number of virtual reflecting surfaces defining one continuous curved reflecting surface. It can be set as a range to reach the target irradiation position.
The reflection central axis of light by each reflection surface or each virtual reflection surface means an optical axis that reflects the centroid position of each reflection surface or each virtual reflection surface.

In addition, the irradiation range has a circular shape, and the multiple reflection surfaces or the multiple virtual reflection surfaces in the reflector are reflection centers of light reflected by the multiple reflection surfaces or the multiple virtual reflection surfaces. The entire axis can be formed so as to reach the outside of the central portion of the diameter having a predetermined size with respect to the diameter of the entire irradiation range.
In this case, it is possible to easily form a reflector suitable for a resin molding apparatus that can equalize the heating temperature of each part of the thermoplastic resin in the mold.
In addition, the center part of the diameter of a predetermined magnitude | size with respect to the diameter of the said whole irradiation range means that it is the circular shape formed concentrically with the circular irradiation range.

The light source may be a halogen lamp, a xenon lamp, or the like that emits light including a wavelength region of 0.78 to 2 μm. Further, the output characteristics, shape, and the like of the light source can be selected according to the type of the object to be heated, the heating application, and the like.

Hereinafter, embodiments of the resin molding apparatus and the resin molding method of the present invention will be described with reference to the drawings.
Example 1
As shown in FIGS. 1 and 2, the resin molding apparatus 1 of this example includes a rubber molding die 6 having a cavity 61 for filling a thermoplastic resin 8 and a wavelength region of 0.78 to 2 μm. And a reflector 3 for distributing the light emitted from the light source 2 and guiding it to the mold 6. The reflector 3 is formed by combining a large number of flat reflecting surfaces 31 in a bowl shape, and distributes light emitted from the light source 2 by the large number of reflecting surfaces 31 to a target irradiation position G at a predetermined distance from the light source 2. It is configured.

As shown in FIG. 3, the resin molding apparatus 1 of the present example has a light reflection center axis D <b> 1 of light reflected by each reflecting surface 31 when the light source 2 and the reflector 3 are fixed and light is distributed to the target irradiation position G. Irradiating the light source 2 and the reflector 3 in an integrated manner so as to draw a circle around the center O of the target irradiation position G. The range E is changed, and the thermoplastic resin 8 filled in the cavity 61 is irradiated with light from the surface of the molding die 6 arranged around the target irradiation position G, and the thermoplastic resin 8 is heated. . In addition, by changing the irradiation range E so as to draw a circle, a moving irradiation range E ′ where the light reflection central axis D1 reaches is formed at the target irradiation position G. The resin molding method of this example also heats the thermoplastic resin 8 by changing the irradiation range E so as to draw a circle with respect to the target irradiation position G by the same configuration as the resin molding apparatus 1.
In addition, the target irradiation position G can be matched with the central location in the light distribution direction X1 in the cavity 61 of the mold 6.

Hereinafter, the resin molding apparatus 1 and the resin molding method of this example will be described in detail with reference to FIGS.
As shown in FIG. 1, the light source 2 and the reflector 3 of this example constitute a halogen heater 11. The halogen heater 11 is configured to rotate the light source 2 and the reflector 3 in an integrated manner so that the light distribution direction X1 (the reflection center axis C2 which is the center of the center of the reflection center axis D1) by the many reflecting surfaces 31 is rotated. It is arranged offset with respect to the moving center axis C1. The light source 2 and the reflector 3 of this example are disposed in a rotating main body 4 that rotates (rotates) in response to a rotational force from a driving source such as a motor. The center of the light source 2 and the reflector 3 (the entire reflection center axis C2) is offset (laterally shifted) with respect to the rotation center axis C1 to be configured. As shown in FIG. 3, when the rotation main body 4 rotates, the light source 2 and the reflector 3 rotate (turn) around the rotation center axis C <b> 1, so that the light at the target irradiation position G is reflected. The irradiation range E can be changed on a circular orbit S around the center O.
The reflector 3 of this example is formed by arranging a large number of flat reflecting plates 31 in a bowl shape that forms a circular irradiation range E.

As shown in FIG. 8, the resin molding apparatus 1 is arranged so that the light distribution direction X1 (reflection center axis C2) is a predetermined inclination angle θ with respect to the rotation center axis C1 of the rotation main body 4. It can also be set up. Also by this, the light irradiation range E at the target irradiation position G can be changed on the circular orbit S.

The light reflected by each reflecting surface 31 in the reflector 3 is irradiated to the target irradiation position G as light that diffuses around the reflection center axis D1 (having a light intensity peak on the reflection center axis D1).
The light source 2 of the present example is a halogen lamp 2 that emits light including a wavelength region of 0.78 to 2 μm (corresponding to a near infrared wavelength region). The halogen lamp 2 has a light intensity peak in the wavelength region of 0.78 to 2 μm (in this example, about 0.9 μm). Further, as shown in FIG. 2, the halogen lamp 2 includes a filament (light emitting body) 21 formed in a spiral shape in a protective tube 22 made of glass or the like. The center of the filament 21 is indicated by the symbol H.

As shown in FIG. 3, in the resin molding apparatus 1 of this example, the center in the light irradiation range E at the target irradiation position G moves on a circular orbit S around the center O at the target irradiation position G. The turning center diameter (the turning diameter through which the center of the irradiation range E passes, the diameter of the circular orbit) B for turning the irradiation range E by the rotating main body 4 is the maximum outer diameter (in this example, the diameter) of the irradiation range E as A. Then, it can be determined to satisfy the relationship of 0.2A ≦ B ≦ 2A. Here, the maximum outer diameter of the irradiation range E refers to the maximum width on the diagonal line at the arrival point of the light reflection central axis D1 in the irradiation range E. In this example, since the irradiation range E has a perfect circle shape, the maximum outer diameter of the irradiation range E refers to the diameter of a perfect circle.
The light irradiation range E can be set, for example, as a range having a diameter of φ20 to 300 mm. The rotation speed for rotating the rotation main body 4 can be set to 10 to 100 rpm, for example.

4 and 6 show the results of simulation of the light distribution state of the halogen heater 11 including the light source 2 and the reflector 3. In each figure, the light emitted from the light source 2 is reflected by each reflecting surface 31 of the reflector 3 and irradiated to the target irradiation position G. The light emitted from the light source 2 is indicated by the center H of the emission position of the light from the filament 21, and the straight line drawn from the reflector 3 to the target irradiation position G indicates the reflection center axis D <b> 1 on the multiple reflection surfaces 31. Here, the reflection center axis D <b> 1 is indicated by the optical axis that reflects the centroid position of the reflection surface 31.

Further, as shown in FIGS. 4 and 6, the large number of reflecting surfaces 31 in the reflector 3 of this example are such that the entire reflection center axis D <b> 1 of the light reflected by the large number of reflecting surfaces 31 is the entire diameter of the irradiation range E. Is arranged in a state of reaching the outside of the range of the central portion F having a diameter of a predetermined size. In designing the structure of the large number of reflecting surfaces 31 in the reflector 3, an irradiation range E at the target irradiation position G is set, and the directions of the reflecting surfaces 31 are set so that light reaches substantially the entire irradiation range E substantially uniformly. Can be determined.

Further, FIG. 4 is arranged so that the entire reflection center axis D1 of the light reaches outside the range of the central portion F having a diameter of about 60% of the entire diameter of the irradiation range E. The designed reflector 3 is shown. FIG. 6 is designed so that the entire reflection center axis D1 of light reaches the outside of the range of the central portion F having a diameter of about 40% of the entire diameter of the irradiation range E. The reflector 3 is shown. The reflector 3 in FIG. 6 is formed by bringing the position of the light source 2 closer to the target irradiation position G by 1 mm (1 mm away from the reflector 3) than the reflector 3 in FIG.

5 and 7, the horizontal axis represents the relative distance (%) from the center of the irradiation range E, and the vertical axis represents the light intensity (irradiation illuminance ratio) (%). It is a graph which shows the light intensity of. FIG. 5 shows the characteristics in the case of FIG. 4, and FIG. 7 shows the characteristics in the case of FIG. The light intensity in the central portion F of the irradiation range E is higher in the halogen heater 11 in FIGS. 6 and 7 than in the halogen heater 11 in FIGS.
Here, the relative distance (%) from the center of the irradiation range E indicates that 100% is the radial position of the irradiation range (irradiation diameter) E. The light intensity (%) represents the light intensity at each portion (each relative distance from the center of the irradiation range E) with respect to the design specified value as a ratio (irradiation illuminance ratio) (%) when the design specified value is 100%. .

5 and 7, the range up to 100% relative distance from the center is the irradiation range E formed at the target irradiation position G, and the light intensity is set to 90% or more. Further, the light does not completely reach outside the irradiation range E, but the light reaches a predetermined relative distance outside the irradiation range E, and the light intensity decreases with a predetermined gradient. It shows that. In addition, each halogen heater 11 has a light intensity (%) of about 100% or more in the range where the relative distance (%) from the center of the irradiation range E is about 80%, and from the center of the irradiation range E. In the range where the relative distance (%) is 80% or more, the light intensity (%) has a characteristic of decreasing at a predetermined gradient.

In this example, an ABS resin that is an amorphous thermoplastic resin and a rubber-modified thermoplastic resin is used as the thermoplastic resin 8.
The mold 6 of this example is made of silicone rubber. This mold 6 is produced by placing a master model (handmade actual product, etc.) of a resin molded product to be molded in liquid silicone rubber, curing the silicone rubber, and taking out the master model from the cured silicone rubber. can do. Further, since the mold 6 is made of rubber, a parting surface (divided surface) for performing mold opening when taking out a molded resin molded product can be easily and arbitrarily formed.

In the resin molding apparatus 1 and the resin molding method of this example, the particulate thermoplastic resin 8 is introduced into the cavity 61 of the rubber mold 6, and the particulate heat in the cavity 61 is inserted through the mold 6. After the thermoplastic resin 8 is irradiated with light including a wavelength region of 0.78 to 2 μm to heat and melt the particulate thermoplastic resin 8, the molten thermoplastic resin is left in the space left in the cavity 61. 8 is filled and a resin molded product is molded.
Thereby, it is possible to fill the entire cavity 61 with the thermoplastic resin 8 without increasing the filling pressure of the thermoplastic resin 8 in the molten state, and to effectively suppress deformation and opening of the mold 6. it can. Therefore, resin leakage from the parting surface in the mold 6 can be prevented, and the quality such as the shape and surface accuracy of the molded resin molded product can be effectively improved.

Although not shown, a filter that reduces the amount of light having a wavelength exceeding 2 μm can be disposed between the reflector 3 and the mold 6. This filter can be made of quartz glass or the like. In this case, the filter can make it difficult for the mold 6 to be irradiated with light having a wavelength easily absorbed by the mold 6 exceeding 2 μm, and the temperature rise of the mold 6 can be more effectively prevented. .
Although not shown, a rubber filter made of the same quality rubber as the mold 6 can be disposed between the reflector 3 and the mold 6. Also in this case, light having a wavelength that is easily absorbed by the mold 6 can be absorbed by the rubber filter, and the temperature rise of the mold 6 can be more effectively prevented.

FIG. 9 shows the light transmittance of each silicone rubber, with wavelength (nm) on the horizontal axis and light transmittance (%) on the vertical axis for transparent silicone rubber and translucent silicone rubber. It is a graph. In the figure, it can be seen that each silicone rubber transmits light having a wavelength between 200 and 2200 (nm). For this reason, when near-infrared rays of this wavelength region are irradiated on the surface of the silicone rubber mold 6, most of the near-infrared light can be transmitted through the mold 6 and absorbed by the thermoplastic resin 8.

The resin molding apparatus 1 of this example uses a single-lamp lamp using a light source 2 and a reflector 3 to mold a resin molded product made of a thermoplastic resin 8 using a rubber mold 6. By appropriately changing the irradiation range E, the thermoplastic resin 8 in the mold 6 can be heated substantially uniformly.
In molding the resin molded product, the thermoplastic resin 8 is filled into the cavity 61 of the rubber mold 6. At the time of filling, light including a wavelength region of 0.78 to 2 μm emitted from the light source 2 is distributed by the reflector 3 and irradiated to the thermoplastic resin 8 in the cavity 61 from the surface of the mold 6. To do. At this time, the thermoplastic resin 8 can be heated more than the rubber mold 6 due to the difference in physical properties between the rubber constituting the mold 6 and the thermoplastic resin 8.

Thereby, the temperature of the thermoplastic resin 8 in the cavity 61 can be maintained higher than the temperature of the rubber mold 6 until the filling of the thermoplastic resin 8 into the cavity 61 is completed. . Therefore, the thermoplastic resin 8 in the cavity 61 can be selectively heated with respect to the rubber mold 6, and it is possible to prevent a poor filling of the thermoplastic resin 8 in the cavity 61 from occurring. A resin molded product can be obtained.

Further, in the resin molding apparatus 1 of this example, the reflector 3 having a structure in which a large number of reflecting surfaces 31 are formed in a bowl shape and light is distributed substantially uniformly to the target irradiation position G is used. Then, when the rotation main body 4 is rotated around the rotation center axis C1, the light source 2 and the reflector 3 whose center is offset with respect to the rotation center axis C1 rotate integrally on the circular orbit S. To do.

At this time, at the target irradiation position G, the center P of the irradiation range E (irradiation diameter) moves on the circular orbit S to form a moving irradiation range E ′. In the part, a time zone in which light is irradiated and a time zone in which light is not irradiated are formed. And by this alternating irradiation of light, the heating temperature in each part of the thermoplastic resin 8 in the rubber mold 6 arranged at the target irradiation position G can be made uniform.
In addition, due to the alternating irradiation of light, the shadow (local heating part) of the filament 21 generated when the shape of the filament (light emitting body) 21 is projected onto the target irradiation position G by the multiple reflecting surfaces 31 of the reflector 3 is the target. It moves at the irradiation position G. Thereby, it can prevent that the site | part which is heated remarkably locally on the thermoplastic resin 8 in the shaping | molding die 6 concentrates.

In addition, since the concentration of the high light intensity portion does not occur at the target irradiation position G, the heating temperature is uniformized not only in the thermoplastic resin 8 having a specific shape but also in the various portions of the thermoplastic resin 8. Can do. Furthermore, the heating temperature in each part of the thermoplastic resin 8 can be made uniform by a simple configuration in which the light source 2 and the reflector 3 are rotated.
Therefore, according to the resin molding apparatus 1 of this example, the thermoplastic resin 8 in the molding die 6 can be selectively heated compared to the rubber molding die 6, and a simple device configuration can The heating temperature at each part of the plastic resin 8 can be made uniform.

Further, the resin molding method of this example can also obtain a resin molded product by utilizing the characteristics of the resin molding apparatus 1 that can make the heating temperature of the thermoplastic resin 8 uniform.
Therefore, according to the resin molding method of this example, the thermoplastic resin 8 in the molding die 6 can be selectively heated as compared with the rubber molding die 6, and each part of the thermoplastic resin 8 can be heated. It is possible to obtain an excellent quality resin molded product by making the temperature uniform.

In this example, an ABS resin was used as the thermoplastic resin 8. As the thermoplastic resin 8, in addition to this, when the surface of the mold 6 is irradiated with light including the wavelength region of 0.78 to 2 μm, the light transmitted without being absorbed into the mold 6 is transmitted. A thermoplastic resin 8 that can be absorbed can be used.

In this example, the molded resin molded product is cooled by air cooling in the cavity 61 of the mold 6 and then taken out from the cavity 61. At this time, since the thermoplastic resin 8 can be selectively heated as described above, the temperature of the mold 6 can be maintained lower than the temperature of the thermoplastic resin 8. Therefore, the cooling time required for cooling the resin molded product can be shortened.
Moreover, since the temperature of the shaping | molding die 6 can be maintained low, deterioration of the shaping | molding die 6 can be suppressed and durability of the shaping | molding die 6 can be improved.

(Example 2)
In this example, as shown in FIG. 10, instead of turning the light source 2 and the reflector 3, the light reflected by the reflector 3 is guided to the target irradiation position G by using the relay reflecting mirror 5.
The resin molding apparatus 1 of this example includes a rubber molding die 6 in which a cavity 61 for filling a thermoplastic resin 8 is formed, a light source 2 that emits light including a wavelength region of 0.78 to 2 μm, A reflector 3 that distributes and reflects light emitted from the light source 2 and a relay reflector 5 that further reflects the light reflected from the reflector 3 and guides it to the mold 6 are provided.

The reflector 3 of this example is formed with a large number of flat reflecting surfaces 31 in a bowl shape (see FIG. 2), and the light emitted from the light source 2 by the numerous reflecting surfaces 31 is at a predetermined distance from the light source 2. Light is distributed to the relay reflector 5. In addition, the relay reflector 5 of this example is configured to reflect the light received from the reflector 3 to the target irradiation position G that is a predetermined distance from the relay reflector 5.
As shown in FIG. 10, the resin molding apparatus 1 of the present example fixes the light source 2, the reflector 3, and the relay reflector 5 and distributes the light to the target irradiation position G. Assuming that the range in which the reflection center axis D1 of the light reflected by the reflecting surface 31 reaches the target irradiation position G is the irradiation range E, as shown in FIGS. 11 and 12, the relay reflector is in a state where the light source 2 and the reflector 3 are fixed. By rotating 5, the irradiation range E is changed so as to draw a circle with respect to the target irradiation position G, and the cavity 61 is filled from the surface of the mold 6 arranged around the target irradiation position G. The thermoplastic resin 8 is irradiated with light, and the thermoplastic resin 8 is heated.

As shown in FIGS. 11 to 13, in the relay reflecting mirror 5 of this example, the light distribution direction X2 reflected by the reflecting surface 51 is inclined with respect to the rotation center axis C1 for rotating the relay reflecting mirror 5. Facing the direction. The relay reflecting mirror 5 of this example is disposed in the rotating main body 4 that rotates (rotates) in response to rotational force from a driving source such as a motor, and constitutes the center of rotation in the rotating main body 4. The reflection light distribution direction X2 of the relay reflecting mirror 5 is inclined with respect to the rotation center axis C1.
In the resin molding apparatus 1 of this example, the reflection light distribution direction X2 by the reflection surface 51 of the relay reflecting mirror 5 is the center O of the target irradiation position G by rotating the relay reflecting mirror 5 around the rotation center axis C1. It moves on the circular orbit S around. 11 and 12 show a state in which the reflected light distribution direction X2 changes due to the rotation of the rotation main body 4.

As shown in FIG. 10, the relay reflector 5 of this example is in a state in which the reflection light distribution direction X2 by the reflection surface 51 is parallel to the rotation center axis C1 of the rotation main body 4 (the reflection surface 51 is vertical). When the relay reflector 5 is in the original position, the light received from the light source 2 (filament 21) is reflected to the center at the target irradiation position G. Further, the relay reflecting mirror 5 refracts the light received from the reflector 3 by 90 ° at the original position where the reflected light distribution direction X2 coincides with the rotation center axis C1, and guides it to the center O of the target irradiation position G. It is configured. Further, the rotation center axis C <b> 1 of the rotation main body 4 of this example is provided to be inclined by 45 ° with respect to the light distribution direction X <b> 1 by the reflector 3. Moreover, the relay reflecting mirror 5 of this example was formed in a disk shape.
In addition, although the reflective surface 51 of the relay reflecting mirror 5 was formed in planar shape, it can also be formed in curved surface form other than this, for example.

Further, the relay reflector 5 is configured such that the tilt angle θ in the reflected light distribution direction X2 can be changed by adjusting the screw 42 with respect to the rotating main body 4 rotating around the rotation center axis C1. It is. The relay reflecting mirror 5 of this example is screwed to both sides of the rotation main body 4 with the rotation center axis C1 sandwiched when the inclination angle θ is changed with respect to the rotation main body 4. The tip of the pair of screws 42 or the plurality of screws 42 is brought into contact with the relay reflector 5 and the projecting length from the screwing position to the tip position of each screw 42 with respect to the turning main body 4 is adjusted. The reflection light distribution direction X2 of the reflection surface 51 with respect to the axis C1 is adjusted. When the tilt angle θ of the reflection light distribution direction X2 with respect to the rotation center axis C1 is set to a predetermined angle by adjusting the screw 42, the reflector 3 is turned off when the relay reflecting mirror 5 is rotated by the rotation main body 4. The oriented light moves on a circular orbit S around the center O at the target irradiation position G.

The resin molding apparatus 1 of the present example includes a single-lamp lamp using a light source 2 and a reflector 3 and a relay reflector in molding a resin molded product made of a thermoplastic resin 8 using a rubber mold 6. 5, the light irradiation range E can be changed appropriately more easily, and the heating temperature in each part of the thermoplastic resin 8 in the mold 6 can be made uniform. .
In molding the resin molded product, the thermoplastic resin 8 is filled into the cavity 61 of the rubber mold 6. In this filling, light including a wavelength region of 0.78 to 2 μm emitted from the light source 2 is distributed by the reflector 3 and the relay reflecting mirror 5, and the heat in the cavity 61 is transmitted from the surface of the mold 6. Irradiate the plastic resin 8. At this time, the thermoplastic resin 8 can be heated more than the rubber mold 6 due to the difference in physical properties between the rubber constituting the mold 6 and the thermoplastic resin 8.

Thereby, the temperature of the thermoplastic resin 8 in the cavity 61 can be maintained higher than the temperature of the rubber mold 6 until the filling of the thermoplastic resin 8 into the cavity 61 is completed. . Therefore, the thermoplastic resin 8 in the cavity 61 can be selectively heated with respect to the rubber mold 6, and it is possible to prevent a poor filling of the thermoplastic resin 8 in the cavity 61 from occurring. A resin molded product can be obtained.

Further, in the resin molding apparatus 1 of this example, the reflector 3 having a structure in which a large number of reflecting surfaces 31 are formed in a bowl shape to distribute light substantially uniformly to the target irradiation position G, and the light received from the reflector 3 is irradiated with the target. The relay reflecting mirror 5 that reflects to the position G is used. When the thermoplastic resin 8 in the mold 6 is heated, the light emitted from the light source 2 is distributed by the reflector 3 and guided to the relay reflecting mirror 5. Further, the relay reflecting mirror 5 is rotated by the rotating main body 4. At this time, the reflection light distribution direction X2 of the relay reflecting mirror 5 with respect to the rotation center axis C1 is adjusted to a predetermined inclination angle θ, and the light incident on the reflecting surface 51 of the relay reflecting mirror 5 has a predetermined reflection angle. The light is emitted to the target irradiation position G.

At this time, at the target irradiation position G, the center P of the irradiation range (irradiation diameter) E reflected by the relay reflector 5 moves on the circular orbit S, and each distance from the center O at the target irradiation position G. In the part, a time zone in which light is irradiated and a time zone in which light is not irradiated are formed. And by this alternating irradiation of light, the heating temperature in each part of the thermoplastic resin 8 in the mold 6 arranged at the target irradiation position G can be made uniform.
In addition, due to the alternating irradiation of light, the shadow (local heating part) of the filament 21 generated when the shape of the filament (light emitting body) 21 is projected onto the target irradiation position G by the multiple reflecting surfaces 31 of the reflector 3 is the target. It moves at the irradiation position G. Thereby, it can prevent that the site | part which is heated remarkably locally on the thermoplastic resin 8 in the shaping | molding die 6 concentrates.

Further, in this example, since the relay reflecting mirror 5 is configured to rotate, it is not particularly necessary to rotate the light source 2, and it is possible to prevent the light source 2 from being deteriorated due to vibration or the like when rotating. Can do. In addition, since the relay reflecting mirror 5 that is lightweight and has no wiring or the like is configured to rotate, the driving of the rotating main body 4 can be facilitated.
In addition, since the concentration of the portion having high light intensity does not occur at the target irradiation position G, the heating temperature of each portion of the thermoplastic resin 8 in various shapes as well as the thermoplastic resin 8 in the specific shape molding die 6 is determined. Uniformity can be achieved.

Therefore, even with the resin molding apparatus 1 of this example, the thermoplastic resin 8 in the mold 6 can be selectively heated compared to the rubber mold 6, and the thermoplastic resin can be obtained by a simple apparatus configuration. The heating temperature in each part of the resin 8 can be made uniform.
Further, the resin molding method of this example can also obtain a resin molded product by utilizing the characteristics of the resin molding apparatus 1 that can make the heating temperature of the thermoplastic resin 8 uniform. Therefore, also by the resin molding method of this example, similarly to Example 1 above, it is possible to obtain a resin molded product of excellent quality by making the heating temperature of each part in the thermoplastic resin 8 uniform.
Also in this example, other configurations are the same as those of the first embodiment, and the same effects as those of the first embodiment can be obtained.

(Confirmation test 1)
In this confirmation test, a test was performed to confirm the effect of making the heating temperature uniform in each part of the thermoplastic resin 8 by the resin molding apparatus 1 shown in Example 2 above.
As the light source 2 and the reflector 3, a halogen heater 11 having a peak of light intensity at a wavelength of 0.9 μm and a maximum rated capacity of 100 V and 2.5 kW (manufactured by Infridge Industry Co., Ltd., HSH-2, f300, φ100) and the lamp temperature of the light source 2 (filament 21) is 3200K.
Further, as the thermoplastic resin 8, an ABS resin was used, and as the mold 6, one made of silicone rubber was used. Further, as the ABS resin, a particulate thermoplastic resin 8 was used, and micro pellets having an average particle diameter of 700 μm were used. In addition, as the ABS resin, one having a recommended molding temperature of 220 ° C., an unmelted temperature of 170 ° C. or less, and an upper limit temperature that causes burning is 300 ° C. was used.
The cavity 61 was in a planar state with a thickness of 2 mm for testing.

In the halogen heater 11 of this confirmation test, the irradiation distance from the light source 2 to the target irradiation position G was 300 mm, and the irradiation range E at the target irradiation position G was φ100 mm. The reflection diameter by the many reflecting surfaces 31 in the reflector 3 of this example was φ145 mm.
Further, since the relay reflector 5 is used in this confirmation test, the distance from the light source 2 to the relay reflector 5 is 150 mm, and the distance from the relay reflector 5 to the target irradiation position G is 150 mm. The irradiation range E at the target irradiation position G was set to φ100 mm by narrowing down by the path from the light source 2 to the relay reflecting mirror 5 and the path from the relay reflecting mirror 5 to the target irradiation position G.

In this confirmation test, the halogen heater 11 shown in FIGS. 6 and 7 of Example 1 was used.
As shown in FIG. 6, in the halogen heater 11 used in this confirmation test, the entire reflection center axis D1 of the light reflected by the many reflecting surfaces 31 is about 40 with respect to the entire diameter of the irradiation range E. It is arranged so as to reach out of the range of the central portion F having a diameter of%.

The temperature of the ABS resin before heating filled in the cavity 61 of the mold 6 is 30 ° C., and the recommended molding temperature is within the range of φ150 mm, which is the irradiated range of the ABS resin in the cavity 61, by the resin molding apparatus 1. The irradiation time (sec) until reaching 220 ° C. was measured. The maximum temperature (° C.), average temperature (° C.), and minimum temperature (° C.) of the ABS resin on the irradiated surface having a diameter of 200 mm were also calculated from the values recorded every 10 seconds. Each temperature was measured using an infrared thermography (manufactured by Nippon Avionics Co., Ltd.).
The results of this measurement are shown in Table 1.

Further, in this confirmation test, when the rotation of the relay reflector 5 is stopped (when the irradiation range E is fixed) (Comparison 1), the turning diameter (circular orbit diameter) B through which the center of the irradiation range E passes is calculated. When the diameter of the irradiation range E is A, the irradiation time and each temperature were measured for the case where the diameter was changed within the range of 0.2A ≦ B ≦ 2A (Inventions 1 to 10).
In the table, the ratio of the diameter B of the circular orbit to the diameter A of the irradiation range E is shown as a rotation ratio B / A. Further, the difference between the maximum temperature (° C.) and the minimum temperature (° C.) is indicated by a temperature difference (° C.).
Invention 1 shows a case where the rotation ratio B / A is 0.2, and Invention 10 shows a case where the rotation ratio B / A is 2.

In addition, the evaluation of the test includes burn determination (determination of whether the surface of the thermoplastic resin 8 has burned), unmelting determination (determination of whether the thermoplastic resin 8 has melted), and comprehensively determine these. went. In the table, the burn judgment is x when the maximum temperature of the thermoplastic resin 8 is 320 ° C. or higher, Δ when 300 to 319 ° C., ◯ 280 ° C. when 280 to 299 ° C. The case of less than is indicated by ◎. In addition, the unmelted determination is x when the minimum temperature of the thermoplastic resin 8 is less than 150 ° C., Δ when the temperature is 150 to 159 ° C., ○ when the temperature is 160 to 169 ° C., 170 ° C. or more. When it becomes, it shows by (double-circle).

In the table, for Comparison 1, although the average temperature is high, the temperature difference between the maximum temperature and the minimum temperature is remarkably large. Further, the thermoplastic resin 8 in the cavity 61 is burned (burning judgment is x), and the thermoplastic resin 8 is likely to be in an unmelted state (unmelting judgment is Δ). Therefore, it can be seen that, depending on the comparison 1, the overall judgment is x, and it is not possible to make the heating temperature uniform in each part of the thermoplastic resin 8 in the mold 6.

On the other hand, for inventions 1 and 2 (when the rotation ratio B / A is 0.2 or 0.4), is the burnout occurring in the thermoplastic resin 8 in each part of the cavity 61 (burn determination is Δ), There is a possibility that an unmelted state may occur (the unmelted determination is ○). For this reason, depending on the inventions 1 and 2, the overall judgment is Δ, indicating that the heating temperature at each portion of the thermoplastic resin 8 in the mold 6 is not sufficient for achieving uniformity.
In Inventions 3 to 5 (when the rotation ratio B / A is 0.6, 0.8, 1), the thermoplastic resin 8 in each part of the cavity 61 may be burned depending on the irradiation time. (Burn determination is ○). However, an unmelted state does not occur (unmelted determination is ◎). Therefore, it can be seen that, depending on the inventions 3 to 5, the overall judgment becomes “good”, and the heating temperature in each part of the thermoplastic resin 8 in the mold 6 can be made uniform.

Inventive products 6 to 10 (when the rotation ratio B / A is 1.2, 1.4, 1.6, 1.8, and 2), the thermoplastic resin 8 in each part of the cavity 61 is burned. It does not occur (burning judgment is ◎), and an unmelted state does not occur (unmelting judgment is ◎). Therefore, according to Inventions 6 to 10, the overall judgment is “◎”, and it was found that the invention is more suitable for achieving uniform heating temperature at each part of the thermoplastic resin 8 in the mold 6.

In addition, it turns out that the irradiation time (sec) until the inside of the range of φ150 mm which is the irradiation range reaches 220 ° C. becomes longer as the rotation ratio B / A is increased. That is, it can be seen that if the rotation ratio B / A is increased, the heating temperature of each part in the thermoplastic resin 8 can be made uniform, but the irradiation time becomes longer.
Therefore, the rotation ratio (ratio of the diameter B of the circular orbit of the moving irradiation range E ′ to the diameter A of the irradiation range E) B / A represents the entire reflection center axis D1 of the light reflected by the multiple reflecting surfaces 31 in the irradiation range E In the case of using the halogen heater 11 formed so as to reach the outside of the central portion F having a diameter of about 40% with respect to the overall diameter, the balance between the uneven heating temperature and the irradiation time is used. It can be seen that the rotation ratio B / A is preferably 0.2-2, more preferably 0.6-2, and even more preferably 1.2-2.

14 to 16, the horizontal axis represents the distance from the center O at the target irradiation position G, and the vertical axis represents the temperature of the thermoplastic resin 8, and the temperature at each part of the thermoplastic resin 8 was measured. Results are shown. 14 shows Comparison 1, FIG. 15 shows Invention 5, and FIG. 16 shows Invention 9.
In each figure, Invention 5 has less temperature deviation at each part of the thermoplastic resin 8 than Comparison 1, and Invention 9 has less temperature deviation at each part of the thermoplastic resin 8 than Invention 5. I understand that.

(Confirmation test 2)
Also in this confirmation test, the test for confirming the effect which can aim at equalizing of the heating temperature in each site | part of the thermoplastic resin 8 by the resin molding apparatus 1 shown in the said Example 2 was done.
In this confirmation test, the halogen heater 11 shown in FIGS. 4 and 5 of Example 1 was used.
As shown in FIG. 4, the reflection center axis D1 due to the large number of reflecting surfaces 31 in the reflector 3 of the halogen heater 11 is located more in the outer edge portion of the irradiation range E than in the case of the confirmation test 1 (FIG. 6). Formed. More specifically, in the halogen heater 11 of this confirmation test, the entire reflection center axis D1 of the light reflected by the many reflecting surfaces 31 is about 60% of the entire diameter of the irradiation range E. It was formed so as to reach out of the range of the central part of the diameter.
The remaining configuration of the halogen heater 11 used in this confirmation test is the same as that in the confirmation test 1. Further, the formation state of the thermoplastic resin 8, the mold 6, and the cavity 61 in the mold 6 used in this confirmation test is the same as that in the confirmation test 1.

In this confirmation test, when the rotation of the relay reflector 5 is stopped (when the irradiation range E is fixed) (Comparison 2), the turning diameter (circular orbit diameter) B through which the center of the irradiation range E passes is irradiated. When the diameter of the range E is A, the irradiation time and each temperature were measured for the case where the diameter was changed within the range of 0.2A ≦ B ≦ 2A (Inventions 11 to 16). In this confirmation test, Invention 11 shows a case where the rotation ratio B / A is 0.2, and Invention 16 shows a case where the rotation ratio B / A is 1.2.
The results of this measurement are shown in Table 2.

In the table, for Comparison 2, although the average temperature is high, the temperature difference between the maximum temperature and the minimum temperature is remarkably large. Further, the thermoplastic resin 8 in the cavity 61 is likely to be burned (burning judgment is Δ), but the thermoplastic resin 8 is not in an unmelted state (unmelting judgment is ◎). Therefore, depending on the comparison 2, it can be seen that the overall judgment is Δ, and it is not possible to make the heating temperature uniform in each part of the thermoplastic resin 8 in the mold 6.

On the other hand, in the inventions 11 and 12 (when the rotation ratio B / A is 0.2 or 0.4), there is a possibility that the thermoplastic resin 8 in each part of the cavity 61 may be burned (the burn judgment is ◯). ) And no unmelted state occurs (unmelted determination is）). Therefore, it can be seen that, depending on the inventions 11 and 12, the overall judgment becomes “good”, and the heating temperature at each part of the thermoplastic resin 8 in the mold 6 can be made uniform.

In Invention 13 (when the rotation ratio B / A is 0.6), the thermoplastic resin 8 in each part of the cavity 61 is not burned (burning judgment is ◎) and is not melted. This also does not occur (the unmelted determination is ◎). Therefore, according to Invention 13, the overall judgment is “◎”, and it can be seen that the heating temperature at each portion of the thermoplastic resin 8 in the mold 6 can be made more effective.
In Inventions 14 to 16 (when the rotation ratio B / A is 0.8, 1, 1.2), there is almost no possibility that the thermoplastic resin 8 in each part of the cavity 61 will be burned (burn determination). Is ◯ or ◎), almost no unmelted state occurs (unmelted determination is ◯). Therefore, it can be seen that, depending on the inventions 14 to 16, the overall judgment becomes “good”, and the heating temperature at each part of the thermoplastic resin 8 in the mold 6 can be made uniform.
In this confirmation test, the evaluation method is the same as that of confirmation test 1.

In FIG. 17 and FIG. 18, the horizontal axis is the distance from the center O at the target irradiation position G, and the vertical axis is the temperature of the thermoplastic resin 8, and the temperature at each part of the thermoplastic resin 8 is measured. Results are shown. FIG. 17 shows Comparison 2 and FIG. 18 shows Invention 13.
In each figure, it can be seen that Invention 13 has less temperature deviation in each part of the thermoplastic resin 8 than Comparison 2. However, it can be seen that Invention 13 has a large temperature deviation compared to Invention 5 and Invention 9 shown in Confirmation Test 1.
From the above results, the halogen heater 11 used in the confirmation test 1 is more uniform in the heating temperature of each part in the thermoplastic resin 8 in the mold 6 than the halogen heater 11 used in the confirmation test 2. Was found to be more suitable.

Claims (9)

1. A molding die made of rubber formed with a cavity for filling a thermoplastic resin, a light source that emits light including a wavelength region of 0.78 to 2 μm, and the above-mentioned molding by distributing light emitted from the light source A reflector for guiding to the mold,
   The reflector has a reflecting surface formed in a bowl shape, and is configured to distribute light emitted from the light source by the reflecting surface to a target irradiation position at a predetermined distance from the light source.
   When the light source and the reflector are fixed and light is distributed to the target irradiation position, the light source and the reflector are defined as a range in which the light reflected by the reflecting surface reaches the target irradiation position. , Or by rotating the reflector with the light source fixed, the irradiation range is changed so as to draw a circle with respect to the target irradiation position, and the target irradiation is performed. A resin molding apparatus configured to irradiate light to the thermoplastic resin filling the cavity from a surface of the molding die arranged around a position and to heat the thermoplastic resin.
2. A rubber molding die formed with a cavity for filling a thermoplastic resin, a light source that emits light including a wavelength region of 0.78 to 2 μm, and light emitted from the light source is distributed and reflected. A reflector and a relay reflector for further reflecting the light reflected from the reflector and guiding it to the mold,
   The reflector has a reflective surface formed in a bowl shape, and is configured to distribute light emitted from the light source by the reflective surface to the relay reflector at a predetermined distance from the light source.
   The relay reflector is configured to reflect light received from the reflector to a target irradiation position at a predetermined distance from the relay reflector,
   When the light source, the reflector, and the relay reflector are fixed and light is distributed to the target irradiation position, the range in which the light reflected by the relay reflector reaches the target irradiation position is set as the irradiation range By rotating the relay reflector in a state where the light source and the reflector are fixed, the irradiation range is changed to draw a circle with respect to the target irradiation position, and around the target irradiation position A resin molding apparatus configured to irradiate light to the thermoplastic resin filled in the cavity from the surface of the molding die disposed on the mold and to heat the thermoplastic resin.
3. In Claim 1, the light source is at a position offset with respect to a rotation center axis for integrally rotating the light source and the reflector,
   The irradiation range is changed so as to draw a circle with respect to the target irradiation position by integrally rotating the light source and the reflector around the rotation center axis. Resin molding equipment.
4. In claim 2, the relay reflector is directed such that the light distribution direction reflected by the reflecting surface is inclined with respect to the rotation center axis for rotating the relay reflector,
   A resin molding apparatus configured to change the irradiation range so as to draw a circle with respect to the target irradiation position by rotating the relay reflecting mirror around the rotation center axis.
5. 5. The relay reflector according to claim 4, wherein the relay reflecting mirror can change an inclination angle in the reflection light distribution direction by adjusting a screw with respect to a rotating main body rotating around the rotation center axis. The resin molding apparatus characterized by the above-mentioned.
6. 6. The center of the irradiation range according to claim 1, wherein the center of the irradiation range moves on a circular orbit around the center at the target irradiation position, and the diameter B of the circular orbit is the maximum outer diameter of the irradiation range. A resin molding apparatus having a relationship of 0.2A ≦ B ≦ 2A when A is used.
7. The reflective surface of the reflector according to any one of Claims 1 to 6, wherein the reflective surface has a multistage structure in which a large number of flat reflective surfaces are combined, or a continuous curved surface structure composed of one continuous curved reflective surface. Have
   The irradiation range is a range in which the reflection central axis of light by the many flat reflecting surfaces reaches the target irradiation position, or light by a large number of virtual reflecting surfaces that divide the one continuous curved reflecting surface. The light irradiation heating device is characterized in that the reflection center axis of the light beam is set as a range that reaches the target irradiation position.
8. A molding die made of rubber formed with a cavity for filling a thermoplastic resin, a light source that emits light including a wavelength region of 0.78 to 2 μm, and the above-mentioned molding by distributing light emitted from the light source Using a resin molding device having a reflector for guiding to a mold,
   The reflector has a reflection surface formed in a bowl shape, and is configured to distribute light emitted from the light source by the reflection surface to a target irradiation position at a predetermined distance from the light source,
   When the light source and the reflector are fixed and light is distributed to the target irradiation position, the light source and the reflector are defined as a range in which the light reflected by the reflecting surface reaches the target irradiation position. , Or by rotating the reflector while fixing the light source, the irradiation range is changed to draw a circle with respect to the target irradiation position, and the target irradiation position A resin molding method comprising irradiating light to the thermoplastic resin filled in the cavity from the surface of the molding die arranged in the periphery of the mold and heating the thermoplastic resin.
9. A rubber molding die formed with a cavity for filling a thermoplastic resin, a light source that emits light including a wavelength region of 0.78 to 2 μm, and light emitted from the light source is distributed and reflected. Using a resin molding apparatus having a reflector and a relay reflector for further reflecting the light reflected from the reflector and guiding it to the mold,
   The reflector has a reflection surface formed in a bowl shape, and is configured to distribute light emitted from the light source by the reflection surface to the relay reflector at a predetermined distance from the light source.
   The relay reflector is configured to reflect the light received from the reflector to a target irradiation position at a predetermined distance from the relay reflector,
   When the light source, the reflector, and the relay reflector are fixed and light is distributed to the target irradiation position, the range in which the light reflected by the relay reflector reaches the target irradiation position is set as the irradiation range By rotating the relay reflector in a state where the light source and the reflector are fixed, the irradiation range is changed to draw a circle with respect to the target irradiation position, and around the target irradiation position A resin molding method comprising: irradiating light onto the thermoplastic resin filled in the cavity from the surface of the molding die disposed on the substrate and heating the thermoplastic resin.

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