JP2019214142A - Mold with heat pipe function - Google Patents

Abstract

To make it possible to be miniaturized and partially cool or heat only a specific part of a mold even for an injection molded body of thin synthetic resin by reducing an amount of heat dispersing in the mold.SOLUTION: Refrigerant passages 42a, 42b, 52a, 52b for cooling an injection molded body 70 formed with synthetic resin in a mold 60 formed with metal powder by additive fabrication and a heat pipe function, thermally coupled to the refrigerant passages 42a, 42b, 52a, 52b, for allowing heat transfer to the mold 60 freely make it possible to have a structure in which a metal pipe 21 constituting the heat pipe is omitted, one end is disposed at a long hole 41 provided in the mold 60 and the other end is disposed on the side of the refrigerant passages 42a, 42b, 52a, 52b, and a working fluid 24 is sealed so as to have only the heat pipe function.SELECTED DRAWING: Figure 17

Description

The present invention relates to cooling or heating of a mold used in injection molding of a synthetic resin, and more particularly, to a mold using a heat pipe including the cooling mechanism and the heating mechanism. The molding die with a heat pipe function of the present invention belongs to a molding die with a heat pipe function that controls the flow of the molten resin flowing through the die and the temperature of the molten resin.
Here, the description will be made on the assumption that the cooling is performed. However, since the heating of the main part of the mold is basically the same, the description will be made here on the assumption that only the cooling is performed.

FIG. 1 is a cross-sectional view illustrating a conventional concept of injection molding with a thin synthetic resin in a narrow position, FIG. 2 is a cross-sectional view illustrating a concept of injection molding with a thin synthetic resin in a narrower position, and FIG. It is sectional drawing explaining the concept of the conventional injection molding.
FIGS. 1 to 3 illustrate a method of molding in a case where the object of the injection molding is the needle-like projections 3a, 3b, 3c, and 3d described by needle-like peaks.
Generally, when the object of the injection molded body 3 as shown in FIGS. 1 to 3 is the needle-like projections 3a, 3b, 3c, 3d, the injection molding between the mold 1 and the insert 2 shown in FIG. The body 3 is arranged so as to be formed, and a coolant path 6 that is turned up at the upper portion is formed inside the insert 2 so that the insert 2 is cooled from the inside. A coolant passage 6 formed as a coolant passage has a drill hole 4a formed at the center of the insert 2 and a shield plate 5 is provided in the drill hole 4a at a position having a half section. When the refrigerant passing through the refrigerant passage 6 enters from the right direction, the course is changed by the shield plate 5, rises at a right angle, makes a U-turn at the upper end of the shield plate 5, descends and flows to the left.

In this cooling method, the mold 1 and the other mold 1a close to the coolant path 6 are cooled by the coolant passing through the coolant path 6, but the coolant is always flowed so that the mold 1 and the mold 1a are cooled. Even in a cooled state, heat is trapped near the point P shown in FIG. 1 near the insert 2 and injection molding may not be performed well.
When the needle-like protrusions 3a, 3b, 3c, 3d are long, as shown in FIG. 2, the entire injection molded body 3 is slightly shorter than the entire length of the nest 2, and the entire injection molded body 3 is cooled. Cooled in Road 6. That is, the refrigerant path 6 is formed to be folded at the upper part of the insert 2, and the insert 2 is cooled by the thick refrigerant path 6a and the thin refrigerant path 6b. However, the coolant path 6b becomes narrower toward the tip, and the flow rate of the coolant is disturbed at the tip, and the probability of the passage clogging due to oxides or the like increases.

Therefore, in order to prevent the passage from being clogged, the refrigerant passing through the refrigerant passage 6 is generally made of a material that is hardly oxidized. However, the passage may still be clogged by foreign matters or the like.
Therefore, there are those skilled in the art who select a method of connecting a plurality of refrigerant paths 6 in series, increasing the supply pressure, and setting the condition of difficulty in clogging. However, there is a problem that if one of the serially connected ones causes the passage to be clogged, a necessary flow rate cannot be secured.
Conversely, if a method of connecting in parallel is adopted, it is difficult to adjust the pressure balance due to the fluid resistance of each refrigerant passage 6. In addition, after the injection molding is repeated, after the heat buildup occurs, the clogging of the flow path can be found, so that the molding loss of the needle-like projections 3a, 3b, 3c, 3d must be wasted. .

Furthermore, the shielding capacity 5a, 5b, 5c, 5d which circulates a refrigerant in the diameter direction of the refrigerant path 6 is inserted, and the cooling capacity is raised by lengthening the distance which a refrigerant flows. It is difficult to control the temperature which affects the flow of the molten resin flowing through the molds 1 and 1a by cooling a thin material of the resin product and cooling a thin tip portion of the resin product. For example, as shown in FIG. 3, when the opening diameter L ₁ of the resin products is less, further it is not easily transmitted influence of the temperature of the size L ₂ in the refrigerant in the upper center.
Although the temperature at point a of the mold shown in FIG. 3 is low, the temperature at point b of the mold does not become lower than the temperature at point a. Not only does the temperature at point b of the mold not drop below the temperature at point a, but it is also insulated by the resin product, where heat accumulates and some parts cannot be cooled.

Therefore, a method of cooling by reducing the diameter of the refrigerant path 6 so that the flow path of the refrigerant flows closer to the refrigerant path 6 of the resin product can be considered. For example, as shown in FIG. 3, insert a thin tube from the opening diameter L ₁ of the injection-molded body 3, a method of heat dissipation from the injection molded body 3.
At this time, the flow resistance of the refrigerant flowing through the small tube becomes higher than that of the small tube. Therefore, the amount of the refrigerant flowing through the narrow tube is reduced due to the height of the flow resistance, and the amount of the flowing refrigerant is reduced, so that the cooling capacity cannot be increased.
That is, if the refrigerant is allowed to pass to the tip of the molds 1 and 1a in order to solve the disadvantage of FIG. 1, the inner diameter of the thin tube becomes thinner and becomes similar to a capillary tube. The flow resistance is large and the flow cannot be gained. Further, the thin tube has a high possibility of clogging and cannot be put to practical use.
Therefore, even if the series-connected thin tubes shown in FIG. 4 are provided, there is a limit in reducing the diameter of the injection molded body 3.

The disadvantage of the conventional example shown in FIGS. 1 to 3 lies in the direct connection of the thin tubes shown in FIG. 4. Therefore, if the thin tubes are connected in parallel as shown in FIG. 5, the disadvantages of FIGS. 1 to 3 can be avoided. Seems to be. Naturally, if a parallel circuit is formed, if the flow of the capillary passing through the narrow end of the mold 1, 1a and the flow of the main flow 6A and the flow of the main flow 6B are connected in parallel, the cooling flow rate will increase as compared with the direct connection. Can increase the flow rate. However, there is no difference that the likelihood of clogging of the capillaries is high.
In addition, even if a plurality of thin tubes are arranged and their lengths are uniform, the fluid pressure and flow rate differ according to Bernoulli's theorem, and the temperatures of the molds 1 and 1a are uniformly cooled according to the arrangement position. To do so, the theory of flow control has not been established and is unknown.

  Therefore, as shown in FIG. 6, there is room for studying a method of transferring the heat energy of the molds 1 and 1a to the refrigerant of the injection molded body 3 by the heat pipes 7a, 7b, 7c and 7d. However, if the molds 1 and 1a and the heat pipe are manufactured separately and they are integrated, the size becomes large, and the technique of forming a thin tube passing through the thin tip portion of the mold has not sufficiently survived. Further, the thin tubes serving as the heat pipes 7a, 7b, 7c, 7d are less likely to be clogged with foreign substances, and if they are integrated by a 3D printer, a small and high-performance one can be obtained.

Here, when the prior art is extracted from the patent and utility model publications, Patent Literature 1 can be cited.
As shown in FIG. 7, the technique of Patent Document 1 discloses a nozzle chamber 1D provided behind a cavity surface 1C of a mold 1A and a mold 1B, and an external connection passage communicated with the nozzle chamber 1D and connected to the outside. 1E, a nozzle 1F disposed in the nozzle chamber 1D for injecting carbon dioxide toward the cavity surface 1C side of the nozzle chamber 1D, and a carbon dioxide gas supply passage 1G for supplying carbon dioxide from the carbon dioxide gas supply means to the nozzle 1F. In one shot of injection molding for molding one injection molded body, carbon dioxide gas is injected for a predetermined time after the molten resin starts to be injected into the cavity 1H.
In this technique, a heat pipe 1J as a high heat conductive member is inserted into a carbon dioxide gas supply passage 1G connected to the outside in a nozzle chamber 1D in which heat is easily generated by cooling the cavity surface 1C serving as a target. In addition, a nozzle 1F for injecting carbon dioxide gas toward the side opposite to the cavity surface 1C side of the target is provided.

Patent Document 2 discloses a mold 11 for molding a plastic optical element 18 shown in FIG. 8 by injection molding, and a movable side insert 12 which is attached to a fixed side insert 12 which does not move in the mold 11 and which can move forward and backward. Armature 13, temperature adjusting means attached to the movable side insert 13 so as to be able to advance and retreat in the same direction and comprising cooling pipes 14, 15, 16 and the like for adjusting the temperature of the movable side insert 13; One end side is embedded in 13, and the other end is attached to the temperature adjusting means. The heat pipe 17 is used to adjust the temperature of the fixed side insert 12 and to move forward and backward in conjunction with the movable side insert 13 and the temperature adjusting means. Have.
In this way, in Patent Document 2, there is provided a mold 11 having a configuration capable of appropriately adjusting the temperature of the movable side insert 13 that can move forward and backward.

JP 2008-290448 A JP 2005-219445 A

The technique of Patent Document 1 is used as a means for lowering the temperature of a target portion by inserting the heat pipe 17. However, the cooling heat is not transmitted to the cavity surface 1C side, but is transmitted to the mold 1A and dispersed. Therefore, it is not suitable for practical use.
In Patent Document 2, one end of a heat pipe 17 is embedded in a movable insert 13, and the other end is attached to a temperature adjusting means including refrigerant passages 14, 15, 16, etc. to adjust the temperature of the fixed insert 12. The movable side insert 13 and the temperature adjusting means are linked to form a heat pipe 17 which can move forward and backward. However, although the technique of Patent Document 2 is used as a means for adjusting the temperature of a target portion by inserting the heat pipe 17, the temperature adjustment is not limited to the fixed side insert 12, but is transmitted to the mold 11. Will be dispersed. Therefore, this technique was also a problem that had to be solved for practical use.
As described above, Patent Documents 1 and 2 use the heat pipes 1J and 17 and the propagation of thermal energy is left to the performance of the heat pipes 1J and 17. In any of Patent Literature 1 and Patent Literature 2, it is necessary to make the mold compact in order to obtain a steep rise.

That is, the propagation of heat energy by the heat pipes 1J and 17 described in Patent Literature 1 and Patent Literature 2 depends on the mold 1A or the fixed side insert 12 and the movable side insert 13 and the refrigerant passage 1K or the refrigerant passage 14, It is how to convey the propagation efficiency well with 15,16.
In that sense, in the heat pipes 7a, 7b, 7c, 7d of FIG. 6, the contact with the coolant path 6 becomes a partial contact, and the heat conducting part becomes a part. As a result, the molding die is filled with heat somewhere, and cannot be used practically.

  Therefore, the present invention has been made to solve the conventional problems, lowering the cooling temperature of the mold, reducing heat build-up, even a thin synthetic resin injection molded product, It is an object of the present invention to provide a molding die having a heat pipe function in which a heat pipe is incorporated in a molding die that can be partially cooled or heated only in a specific portion and can be reduced in size.

A molding die with a heat pipe function according to the invention of claim 1, wherein an injection molded body or an extruded molded body for molding a synthetic resin is laminated with a metal powder, and a molded mold is formed. A coolant path formed in the mold for cooling the extruded body, and a heat pipe function component thermally coupled to the coolant path and capable of freely transferring heat to the mold, The heat pipe functional component is laminated with the metal powder, shaped, and branched from the coolant path to cool the mold.
The heat pipe functional component has a closed space in which one end is thermally connected to the refrigerant path and the other end is thermally connected to the mold, and the working fluid repeats vaporization and liquefaction in the closed space. The heat transfer from the mold to the coolant path is free.

Here, in the above-mentioned mold, it does not matter the position and shape of the upper mold or the lower mold, the cavity or the core, but the one that forms the injection molded body or the extruded molded body made of the synthetic resin, It includes a cavity or a core that forms the whole, and a metal output 3D printer (printer of three-dimensional metal output) is used to laminate and mold an injection molded or extruded molded product of synthetic resin with metal powder. is there.
The three-dimensional metal output 3D printer is a metal output 3D printer that obtains a molded product for industrial products by laminating and melting three-dimensional metal powder using spherical metal powder.
Further, the refrigerant passage is a refrigerant passage made of known cooling water for cooling the injection molded body or the extruded molded body made of the synthetic resin.

The heat pipe functional component is configured to evacuate the inside of the closed space long hole provided in the mold, and to use a small amount of an alternative fluorocarbon (hydrochlorofluorocarbon (HCFC), hydrofluorocarbon (HFC), perfluorocarbon (PFC) as a working fluid. ), Etc., or pure water is sealed, and a wick structure in which a capillary phenomenon occurs on the inner wall of the long hole of the closed space. The function of the heat pipe functional component is as follows. First, when the heat-in (heat input) side of one end is cooled by a refrigerant to a low temperature, and when the heat-out (heat output) side is at a high temperature, the heat-out side is heated. The working fluid evaporates and becomes a steam flow and moves to the low temperature part. At this time, when the steam flow contacts the long hole of the closed space of the mold, the steam flow is cooled by the mold and condensed, and the condensed liquid returns to the heat-in side due to gravity, capillary phenomenon, etc., and evaporates, moves again, The cycle of condensation is repeated, transferring heat continuously from the hot side to the cold side.
Here, the closed space long hole provided in the mold is a wick that continuously moves the working fluid sealed by capillary action from a low temperature side to a high temperature side around the closed hole.
Since the closed space slot formed in the mold formed by the metal output 3D printer is a space for forming a wick, it suffices if a path having a small heat transfer resistance through which heat of heat energy moves is secured.

  A molding die with a heat pipe function according to the invention of claim 2, wherein the injection molding or the extrusion molding for molding a synthetic resin is formed by laminating and molding a metal powder, and the injection molding or the extrusion molding. A coolant path formed in the mold for cooling the mold, a closed space in which one end is thermally connected to the coolant path and the other end is thermally connected to the mold, and a working fluid is vaporized in the closed space. And a heat pipe function component that allows heat to move freely from the mold to the coolant path that repeats liquefaction.The heat pipe function component is formed by lamination with the same material as the mold, and the coolant path is formed. The diameter was smaller than that.

Here, the heat pipe functional component was laminated with the same material as the mold by a metal output 3D printer, formed into a specific shape, and inserted into a smaller diameter than the refrigerant passage. Thereby, an injection molded body or an extruded molded body for molding a synthetic resin is laminated with a metal powder, and formed into a mold that is melt-bonded, and a mold that cools the injection molded body or the extruded molded body. A heat pipe functional component that is thermally coupled to the cooled refrigerant path and allows heat to move freely to the mold is continuously formed by a metal output 3D printer.
The heat pipe functional component has a closed space in which one end is thermally connected to the refrigerant path and the other end is thermally connected to the mold, and the working fluid repeats vaporization and liquefaction in the closed space. The heat transfer from the mold to the coolant path is free.

  A molding die having a heat pipe function according to the invention of claim 3 is a die formed by laminating an injection molded body or an extruded molded body for molding a synthetic resin with metal powder, and the injection molded body or the extruded molded body. A coolant path formed in the mold for cooling the mold, a closed space in which one end is thermally connected to the coolant path and the other end is thermally connected to the mold, and a working fluid is vaporized in the closed space. And a heat pipe function component capable of freely transferring heat from the mold to the coolant path that repeats liquefaction, wherein the heat pipe function component omits a metal pipe constituting the heat pipe function component. A wick for sealing the working fluid by arranging one end as a closed space elongated hole formed in the mold and the other end on the refrigerant path side to continuously move the working fluid from a low temperature side to a high temperature side. It is what constituted.

Here, the mold is not limited to an upper mold or a lower mold, a cavity or a core, and forms the injection molded body or the extruded molded body made of the synthetic resin, and forms one or the whole cavity. Alternatively, using a metal output 3D printer (three-dimensional printer), a metal output 3D printer (three-dimensional printer) is used, and an injection molded body or an extruded body for molding a synthetic resin is laminated and formed with metal powder. The closed space long hole provided in the mold is a wick for continuously moving the working fluid enclosed by capillary action from a low temperature side to a high temperature side around the periphery thereof. Here, since the closed space slot formed in the mold formed by the metal output 3D printer is a space for forming a wick, it is sufficient that a path with a small heat transfer resistance through which heat of heat energy moves is secured.
The heat pipe functional component has a closed space in which one end is thermally connected to the refrigerant path and the other end is thermally connected to the mold, and the working fluid repeats vaporization and liquefaction in the closed space. The heat transfer from the mold to the coolant path is free.

  A molding die with a heat pipe function according to a fourth aspect of the present invention is a molding die formed by laminating an injection molded body or an extruded molded body for molding a synthetic resin with metal powder, and the injection molded body or the extruded molded body. A coolant path formed in the mold for cooling the mold, a closed space in which one end is thermally connected to the coolant path and the other end is thermally connected to the mold, and a working fluid is vaporized in the closed space. And a heat pipe function component capable of freely transferring heat from the mold to the coolant path that repeats liquefaction, wherein the heat pipe function component omits a metal pipe constituting the heat pipe function component. A wick for sealing the working fluid by arranging one end as a closed space elongated hole formed in the mold and the other end on the refrigerant path side to continuously move the working fluid from a low temperature side to a high temperature side. Was configured.

The heat pipe functional component that allows heat to move freely to the mold does not include a metal pipe, and the present invention forms the closed space long hole in the mold, and the heat pipe is formed by the closed space long hole. It is replaced with a metal pipe that constitutes a functional component.
Here, the mold is not limited to an upper mold or a lower mold, a cavity or a core, and forms the injection molded body or the extruded molded body made of the synthetic resin, and forms one or the whole cavity. Alternatively, a metal output 3D printer is used, and an injection molded article or an extruded molded article for molding a synthetic resin is laminated and formed with metal powder using a metal output 3D printer.
Further, the refrigerant passage is a refrigerant passage made of known cooling water for cooling the injection molded body or the extruded molded body made of the synthetic resin.
The heat pipe functional component has a closed space in which one end is thermally connected to the refrigerant path and the other end is thermally connected to the mold, and the working fluid repeats vaporization and liquefaction in the closed space. The heat transfer from the mold to the coolant path is free.

The heat pipe functional component is configured to evacuate the inside of the closed space long hole provided in the mold, and to use a small amount of an alternative fluorocarbon (hydrochlorofluorocarbon (HCFC), hydrofluorocarbon (HFC), perfluorocarbon (PFC) as a working fluid. ), Etc., or pure water is sealed, and a wick structure in which a capillary phenomenon occurs on the inner wall of the long hole of the closed space.
Here, the closed space long hole provided in the mold is a wick that continuously moves the working fluid sealed by capillary action from a low temperature side to a high temperature side around the closed hole.
Here, since the closed space slot formed in the mold formed by the metal output 3D printer is a space for forming a wick, it is sufficient that a path with a small heat transfer resistance through which heat of heat energy moves is secured.

  The heat pipe functional component of the invention according to claim 5, wherein the closed space long hole formed in the mold for continuously evaporating the working fluid and condensing the working fluid is provided, and a wall surface in the closed space long hole. And a wick that continuously moves the working fluid sealed by capillary action from the low temperature side to the high temperature side, and the working fluid boils, and the vapor is transferred from the high temperature side (heat-in) to the low temperature side (heat-out). ), And the vapor is condensed to release heat of condensation.

The wick for continuously moving the working fluid from the low-temperature side to the high-temperature side of the molding die with a heat pipe function according to the invention of claim 6 is formed on the wall surface of the metal pipe with a microporous structure metal (porous). is there.
Here, any metal may be used as long as it is a microporous structure metal formed on the wall surface of the long hole of the closed space and a capillary phenomenon occurs.

The wick for continuously moving the working fluid from the low-temperature side to the high-temperature side of the molding die with a heat pipe function of the invention of claim 7 is located on the entire inner surface on the wall surface side in the closed space long hole of the die. The closed space may be made of a metal having a microporous structure which is communicated, or a central pipe formed by combining one or more spiral thin tubes located on the wall surface side in the elongated hole of the closed space and a central pipe at an end. It comprises one of a plurality of parallel thin tubes positioned on the wall surface side in the elongated hole and a central pipeline integrated at the ends.
Here, the loss of heat energy is reduced from the communicating microporous structure metal located on the entire inner surface on the wall surface side in the closed space long hole provided in the mold to reduce the loss of heat energy in the closed space long hole formed in the mold. Since heat is conducted to one or more spiral thin tubes or a plurality of parallel thin tubes via the communicating microporous structure metal located on the entire inner surface on the wall surface side, a configuration with less heat energy loss is possible.

In the molding die with a heat pipe function according to the invention of claim 8, a heat sink for cooling the injection molded body or the extrusion molded body is provided on the refrigerant path side of the heat pipe functional constituent body.
Here, the heat sink may be a heat-dissipating function formed in a coolant path for cooling the injection-molded body or the extruded body in the mold, and preferably has a surface area as large as possible.

The molding die with a heat pipe function of the invention according to claim 1 has a sealed space in which one end is thermally coupled to the coolant path and the other end is thermally coupled to the mold. A heat pipe function component that allows heat to freely move from the mold to the coolant path that repeats vaporization and liquefaction branches from the coolant path and cools the mold.
Therefore, since the heat pipe functional component is provided branching from the refrigerant path, the temperature of the entire mold can be made uniform by using a common hydraulic fluid (including water). Further, the cooling capacity can be arbitrarily set depending on the mold part.

The molding die with a heat pipe function of the invention according to claim 2 is a sealed space in which one end is thermally coupled to the coolant path and the other end is thermally coupled to the mold. The heat pipe function component, which is capable of freely transferring heat from the mold to the coolant path, which repeats vaporization and liquefaction, is formed by lamination with the same material as the mold, and has a smaller diameter than the coolant path.
Therefore, since the heat pipe functional component is formed by laminating and molding the same material as the mold, it can be easily three-dimensionally expressed by a metal output 3D printer. Since the diameter is smaller than that of the road, it can be formed in a large number in the mold, and can have characteristics in accordance with the characteristics of the injection molded body or the extruded molded body.

The molding die with a heat pipe function of the invention according to claim 3 is a sealed space in which one end is thermally coupled to the coolant path and the other end is thermally coupled to the mold. The heat pipe function component that allows heat transfer from the mold to the refrigerant path to repeat vaporization and liquefaction was omitted, and one end was formed in the mold, omitting the metal pipe that constitutes the heat pipe function component. The working fluid is sealed by forming a closed space slot and the other end disposed on the refrigerant path side.
Therefore, the metal pipe constituting the heat pipe functional component is omitted, a portion corresponding to the metal pipe of the heat pipe is directly formed in the mold, and the other end is disposed on the refrigerant path side and the hydraulic fluid is provided. Is sealed to provide the function of the heat pipe function component, so that there is no need to insert a thin metal pipe, and the mold can be easily formed.

  In a molding die with a heat pipe function according to a fourth aspect of the present invention, one end is thermally coupled to the coolant path, and the other end is thermally coupled to the mold. A heat pipe function component that allows heat to move freely from the mold to the refrigerant path, which repeats vaporization and liquefaction, is a sealed tube in which one end is provided in the mold and one end of the heat pipe function component is omitted from the mold. It has a space elongated hole, the other end of which is disposed on the side of the refrigerant path to form a structure for sealing the working fluid, and has only a heat pipe.

Therefore, the mold carries the function of the metal pipe of the heat pipe function component, and in particular, the working fluid is formed by laminating the injection molded body or the extruded body with metal powder and integrally forming the same. A wick for continuously moving from the low temperature side to the high temperature side is formed at the time of molding, the number of components constituting the heat pipe functional component is reduced, and the closed space elongated hole formed in the mold is formed in a thin form. Since it can be made and saves space, it can be arranged in a thin mold.
Further, since the inner wall surface of the closed space elongated hole is formed in the mold, heat conduction is good and heat energy loss is reduced. Further, since the heat is cooled by the heat pipe function, the heat radiation efficiency can be improved as compared with the radiation by the normal heat conduction.

  When a heat sink for cooling the injection molded body or the extruded molded body is provided on the other end side of the closed space long hole of the mold, heat energy up to the mold moves through the heat sink. The injection molded article or the extruded molded article can be cooled. Since the heat of the heat sink is directly transferred to the upper mold of the fixed side and the lower mold of the movable side, the cooling is rapidly performed. The heat sink may be formed as a part of a mold with fins formed by a metal output 3D printer, or may be externally assembled and tightened with bolts or the like to improve heat conduction. The surface of the fin is desirably cooled by the flow of the coolant, but may be exposed to the air as air cooling. In practicing the present invention, the form of the heat sink does not matter.

  6. The heat pipe function of the molding die with a heat pipe function according to claim 5, wherein the closed space formed in the mold is formed by laminating and molding metal powder that continuously evaporates the working fluid and condenses the working fluid. A long hole, a wick positioned on the wall surface side in the closed space long hole and continuously moving the working fluid sealed by capillary action from a low temperature side to a high temperature side, and the working fluid is boiled, 5 moves from the high-temperature side (heat-in) to the low-temperature side (heat-out), and the vapor is condensed, so that heat of condensation is released in the condensing section. In addition to the effects described in any one of the above, the inner surface of the closed space long hole formed in the mold laminated and formed with the metal powder continuously evaporates the working fluid and condenses the working fluid efficiently. Because it can be performed well, the closed space length A wick that is located on the inner wall surface side and continuously moves the enclosed working fluid from the low temperature side to the high temperature side by capillary action, and that the working fluid boils, and the vapor is transferred from the high temperature side (heat-in) to the low temperature side. (Heat-out) and the vapor condenses, so that the heat of condensation is efficiently released in the condensing section.

  The wick for continuously moving the hydraulic fluid from the low temperature side to the high temperature side according to the invention of claim 6 is formed on the wall surface of the closed space long hole formed in the mold with a microporous structure metal (porous). Therefore, in addition to the effect according to any one of claims 1 to 5, a wick for continuously moving the working fluid from the low temperature side to the high temperature side is formed of a metal having a microporous structure. Accordingly, the sense of unity between the mold and the wick of the microporous structure metal is strong, and the thermal efficiency can be increased.

  The wick for continuously moving the working fluid from the low-temperature side to the high-temperature side of the molding die with a heat pipe function of claim 7 is located on the entire inner surface on the wall surface side in the closed space elongated hole formed in the die. Whether it is a communicating microporous metal (porous), or a central pipe formed by combining one or more spiral thin tubes located on the wall surface side in the long hole of the closed space and the central pipe at the end; 7. The device according to claim 1, comprising one of a plurality of parallel thin tubes positioned on a wall surface side in the long hole of the closed space and a central pipeline integrated at end portions. 8. In addition to the effects described in (1), a wick that has good conduction between the mold and the wall surface side in the closed space long hole, and continuously moves the enclosed working fluid from the low temperature side to the high temperature side by capillary action , And the steam in which the working fluid boils It can be heat transfer to the cold side (heat out) from the emission).

  The molding die with a heat pipe function of the invention according to claim 8 is provided with a heat sink for cooling the injection molded body or the extrusion molded body on the refrigerant path side. In addition to the effects described in any one of the above, the thermal efficiency can be increased.

FIG. 1 is a cross-sectional view illustrating a conventional concept of injection molding with a thin synthetic resin at a narrow position. FIG. 2 is a cross-sectional view for explaining the concept of injection molding with a thin synthetic resin at a narrow position in the related art as compared with FIG. FIG. 3 is a sectional view for explaining the concept of conventional injection molding. FIG. 4 is an explanatory view of a structure for explaining the principle of a molding die based on an assumed direct connection of a refrigerant. FIG. 5 is an explanatory diagram of a structure for explaining the principle of a molding die with a heat pipe function by parallel connection of assumed refrigerants. FIG. 6 is an explanatory diagram of a structure for explaining the principle of a molding die with a heat pipe function by a assumed heat pipe function of a refrigerant. FIG. 7 is an explanatory diagram for explaining the operation principle of injection molding of Patent Document 1. FIG. 8 is an explanatory diagram for explaining the operation principle of the injection molding of Patent Document 2. FIG. 9 is a partially sectional explanatory view of a mesh wick having a structure for explaining a heat pipe operation principle of a conventional injection mold. FIG. 10 is a partial cross-sectional explanatory view of a ripple wick having a structure for explaining a heat pipe operating principle of an injection mold according to a conventional example. FIG. 11 is an explanatory view illustrating the operation principle of a conventional heat pipe. FIG. 12 is an explanatory diagram illustrating the operation principle of the heat pipe function of the molding die with the heat pipe function according to the first embodiment of the present invention. FIG. 13 is an explanatory diagram illustrating the operation principle of the heat pipe function of the molding die with a heat pipe function according to the second embodiment of the present invention. FIG. 14 is an explanatory diagram illustrating the operation principle of the molding die with a heat pipe function according to the third embodiment of the present invention. FIG. 15 is an explanatory diagram illustrating the operation principle of the molding die with a heat pipe function according to the fourth embodiment of the present invention. FIG. 16 is an explanatory diagram illustrating the operating principle of the heat pipe function of the molding die with a heat pipe function according to the fifth embodiment of the present invention. FIG. 17 is an explanatory diagram illustrating the operating principle of the heat pipe function of the molding die with a heat pipe function according to the sixth embodiment of the present invention. FIG. 18 shows a seventh embodiment of the present invention, in which (a) shows a mechanical part of a robot hand, and (b) shows a completed robot hand having a synthetic resin formed on its outer cover. 19A and 19B are diagrams illustrating a seventh embodiment of the present invention, in which FIG. 19A is an explanatory diagram of an outer cover made of a synthetic resin, and FIG. 19B is an explanatory diagram illustrating a cooling mechanism of a mold.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the embodiments, the same symbols and the same reference numerals in the drawings are the same or corresponding functional portions, and thus the duplicated description thereof will be omitted.

[Embodiment]
FIG. 9 is a partial cross-sectional view illustrating a mesh wick having a structure for explaining the principle of a conventional heat pipe, and FIG. 10 is a partial cross-sectional view illustrating a ripple wick having a structure for explaining the conventional heat pipe principle. FIG. 11 is a sectional view for explaining the principle of a conventional heat pipe. In the present embodiment, the description will be made assuming that the metal pipe 21 is included in the constituent requirements.

  The heat pipe 20 described as a heat pipe functional component in FIGS. 9 to 11 is vertically erected such that the upper side has a high-temperature part side 25 and the lower side has a low-temperature part (cooling part) side 22. There is also a construction example in which it is arranged to be inclined at an angle of. The hydraulic fluid 24 evaporates on the surface of the inner wall 23 on the high temperature part side 25 by receiving the heat input 26, and the vapor of the hydraulic fluid 24 generated on the high temperature part side 25 descends through the central cavity of the metal pipe 21, It moves to the low temperature part side 22 of the heat pipe 20. The vapor of the working fluid 24 is cooled while reaching the low temperature part 22, aggregates and becomes a liquid, is stored in the inner wall 23 of the metal pipe 21, again causes a capillary phenomenon by wick, and the inner wall 23 of the metal pipe 21 Ascend along mesh wick A.

That is, the working fluid 24 rises on the mesh wick A formed on the inner wall 23 of the metal pipe 21 and returns to the high temperature part side 25.
As described above, when a temperature difference is given between the high temperature section 25 and the low temperature section 22, the working fluid 24 circulates in the metal pipe 21 in the heat pipe 20, and heat is transferred from the high temperature section to the low temperature section.
Here, the mesh wick A shown in FIG. 9 and the ripple wick B shown in FIG. 10 have a structure in which a capillary phenomenon easily occurs. In practicing the present invention, it is desirable that the liquid rises by capillary action and then evaporates while rising.

  In particular, in the structure of the conventional heat pipe 20, as shown in FIG. 11, both ends of a metal pipe 21 made of copper or a copper alloy are sealed, and the inside is in a vacuum state. The inner surface of the metal pipe 20 has a structure called a wick in which a capillary phenomenon occurs. For example, as shown in FIG. 9, a mesh wick A in which a fine wire mesh is arranged on the inner periphery of the metal pipe 21 may be used, or as shown in FIG. Alternatively, a ripple wick B in which a fine slit is formed on the inner periphery of the metal pipe 21 may be used. Further, a small amount of alternative Freon or pure water can be used as the working fluid 24. For this reason, in the present embodiment, the description is made on the assumption that the inside is in a vacuum state, and suction is performed in a vacuum state in the manufacturing process. However, the finished product is steam or alternative fluorocarbon gas (hydrochlorofluorocarbon) in the metal pipe 21. (HCFC), hydrofluorocarbon (HFC), perfluorocarbon (PFC), etc.) and are in a reduced pressure state. Therefore, the internal vacuum state is not a strict vacuum state.

Here, the operation of the conventional heat pipe 20 will be described.
The lower end of one conventional heat pipe 20 is a heat-out (radiator), the upper end is a heat-in (evaporator), and heat energy enters from a heat input 26 side and heat output from a heat output 27 in terms of use. Discharged through cooling water.

  More specifically, the upper end of the heat pipe 20 has an injection molded body 70 shown in FIGS. 16 and 17, and when the injection molded body 70 is cooled, the injection molded body 70 is on the heat-in side to constitute a heat receiving unit. . Here, the heat of the injection molded body 70 is used for evaporating the working fluid 24, and the steam of the working fluid 24 at this time moves in the metal pipe 21. In this embodiment, it descends. At this time, the wick contacts the wick on the wall surface side of the metal pipe 21, where the vapor changes to a liquid and returns to the working fluid 24. The working fluid 24 condensed by contacting the wick on the wall surface of the metal pipe 21 dissipates heat through a heat-out (radiator), and the condensed working fluid 24 flows upward by capillary action such as a wick and rises. The working fluid 24 sealed in the heat pipe 20 is determined by the temperature controlled by the heat pipe 20. Thus, the temperature of the injection molded body 70 is cooled by the metal pipes 21 of the plurality of heat pipes 20.

In practicing the present invention, the above-described heat pipe 20 has a configuration in which the metal pipe 21 is not provided. The operation is basically the same as that of the heat pipe 20 having the metal pipe 21. Instead of the metal pipe 21, a closed space elongated hole 41 of the upper mold 40 is provided. As a precaution, the heat pipe function of the present embodiment will be mainly described with reference to FIGS.
In addition, the heat pipe function component of the molding die with a heat pipe function according to the embodiment of the present invention has a closed end in which one end is thermally connected to the refrigerant passage 53 and the other end is thermally connected to the upper die 40. The space is formed as a heat pipe 20-shaped space by multiplying and integrating metal powder with a metal output 3D printer. Here, although it is completely different from the heat pipe 20, it is difficult to represent the heat pipe 20, and therefore, the virtual heat pipe 20A will be described.
Then, the working fluid 24 in the virtual heat pipe 20A repeats vaporization and liquefaction in the closed space, and heat transfer for cooling the upper mold 40 by the refrigerant passage 53 becomes free.

In the upper mold 40 of FIG. 16 and FIG. 17 (only the case of the upper mold 40 will be described), a closed space long hole 41 for performing the function of the virtual heat pipe 20A is formed. The diameter and length of the closed space long hole 41 are determined by the thickness of the upper mold 40, the volume of the injection molded body, or the form such as the cross-sectional area of the extruded molded body depending on the extrusion speed.
The microporous structure metal (porous) C shown in FIG. 12 is formed on the wall surface of the closed space long hole 41 formed in the upper mold 40, and a capillary phenomenon occurs. The microporous structure metal C is a foamed metal or a material formed so as to cause a capillary phenomenon by fine perforations, and is formed of a metal so that heat conduction with the upper mold 40 is good.
It should be noted that the metal wick A shown in FIG. 9, that is, the mesh wick A on the inner periphery of the virtual heat pipe 20A, and the ripple wick B shown in FIG.

  The microporous structure metal C according to the present embodiment is a metal mold 60 that is thermally coupled to refrigerant paths 42a, 42b, 52a, and 52b obtained by laminating an injection molded body for molding a synthetic resin with metal powder. Is formed by a metal output 3D printer, but a vertical cross-section inverted U-shape, that is, a finger-suck-shaped microporous metal body is formed, and inserted with a thin rounded insertion bar, The microporous structure metal C may be assembled in the closed space slot 41 formed in the upper mold 40. In the embodiment of the present invention, the closed space slot 41 is formed in the upper mold 40 formed by lamination molding with metal powder that continuously evaporates the working fluid 24 and condenses the working fluid 24. A wick made of a metal C having a microporous structure, which is located on the wall surface side in 41 and continuously moves the working fluid 24 sealed by capillary action from the low temperature side to the high temperature side.

In the present embodiment, an O-ring 39 made of copper or a copper alloy is arranged on the opening side of the microporous structure metal C, and is screwed into the male screw 28 of the bolt and the end of the long hole 41 of the closed space. The formed female screw 42 is screwed and sealed. Particularly, since sealing is required, the bolt head 28a is provided so as to apply a pressing force.
Further, an O-ring 39 is disposed on the opening side of the microporous structure metal C, and an O-ring 39 is disposed on the opening side of the microporous structure metal C. May be reduced in pressure to form a volume pool for containing a predetermined amount of the working fluid 24.

  The closed space elongated hole 41 formed in the upper mold 40 has an injection molded body 70 (not shown) outside the upper mold 40 shown in FIG. 16. When the injection molded body 70 is cooled, the injection molded body 70 side is closed. It is on the heat-in side and constitutes a heat receiving section. Here, the heat of the injection molded body 70 is used for evaporating the working fluid 24, and the vapor of the working fluid 24 at this time descends in the center of the closed space long hole 41. At this time, the vapor comes into contact with the wick on the wall surface side of the closed space long hole 41, where the vapor is deprived of latent heat and changes into a liquid, and returns to the working fluid 24. The working fluid 24 that has condensed by contacting the wick on the wall surface of the closed space long hole 41 radiates heat through a heat-out (radiator), and the condensed working fluid 24 flows upward due to capillary action such as a wick and rises. The working fluid 24 sealed in the virtual heat pipe 20A is determined by the temperature controlled by the virtual heat pipe 20A. As described above, the temperature of the injection molded body 70 is cooled by the plurality of virtual heat pipes 20A.

In the embodiment shown in FIG. 13, a closed space elongated hole 41 for performing the function of the virtual heat pipe 20 </ b> A is formed in the upper mold 40. Like the former, the diameter and length of the closed space slot 41 are determined by the form such as the thickness of the mold, the volume of the injection molded body, or the cross-sectional area of the extruded molded body depending on the extrusion speed.
The closed space long hole 41 formed in the upper mold 40 is formed by a fine porous structure metal (porous) C1 formed on the wall surface thereof and three spiral thin tubes D1, D2, D3 and spiral thin tubes D1, D2, D3. Is constituted by a central pipeline E disposed at the center of the center line. Here, the microporous metal C1 improves heat conduction to the spiral tubes D1, D2, and D3. The three spirally wound spiral thin tubes D1, D2, and D3 are provided with a steam reservoir F at the upper end of the center where the working fluid 24 receives a heat input 26 and evaporates. Therefore, the hydraulic fluid 24 in the three spirally wound spiral capillaries D1, D2, and D3 flows upward due to capillary action such as wick. Under the influence of the temperature, the central conduit E flows from the steam reservoir F at the head of the spiral tubules D1, D2, D3 which evaporates in response to the heat input 26, while moving down the central conduit E while the vapor of the hydraulic fluid 24 is flowing down. Is liquefied.

The closed space slot 41 formed in the upper mold 40 is a metal C1 having a fine porous structure formed on the wall surface thereof, and causes a capillary phenomenon. The microporous structure metal C1 is a foamed metal or a material formed so as to cause a capillary phenomenon by fine perforations, and is formed of a metal so that heat conduction with the upper mold 40 is good.
The lower ends of the spiral thin tubes D1, D2, and D3 and the lower end of the central conduit E are located at the lower end of the closed space long hole 41, are not sucked in the hydraulic fluid 24, and are located at a position higher than the upper surface of the hydraulic fluid 24. . In the embodiment of FIG. 13, the spiral thin tubes D1, D2, and D3 are connected to the upper end of the central conduit E. However, the ends of the spiral thin tubes D1, D2, and D3 may be integrated.
In the present embodiment, the microporous structure metal C1, the spiral thin tubes D1, D2, D3 and the central conduit E are provided on the inner wall 23 of the closed space slot 41, but the microporous structure metal C1, the spiral thin tube One or more of D1, D2, D3, and the central conduit E can be omitted.

Also, in the embodiment shown in FIG. 14, the function of the virtual heat pipe 20A is that the diameter and the length of the closed space long hole 41 are the thickness of the mold described above, The volume or the extrusion speed is determined by the form, such as the cross-sectional area of the extruded product.
.., Gn arranged around the wall surface of the closed space long hole 41 are uniformly formed around the closed space long hole 41. Are located. At the upper ends of the parallel thin tubes G1, G2,..., Gn, there is provided a steam reservoir J for collecting the steam that the working fluid 24 evaporates in response to the heat input 26. Below the center of the vapor reservoir J, a passage is formed in which heat energy enters from a heat input 26 and is discharged from a heat output 27. The lower end of the large-diameter pipe H provided around the wall surface of the closed space slot 41 is provided with the lower end of the closed space slot 41 above the level of the hydraulic fluid 24. The lower end of the closed space slot 41 is also provided at the lower end of the large-diameter pipe H above the liquid level of the hydraulic fluid 24.

  The parallel thin tubes G1, G2,..., Gn disposed around the wall surface of the closed space slot 41 are preferably disposed inside the gap, but are arranged uniformly and densely around the closed space slot 41. Is desirable. Also, the lower end of the large-diameter pipe H is located above the liquid level of the hydraulic fluid 24. However, in the case of implementing the present invention, the substantially entire length of the closed space slot 41 may be set, or may be 1/2. May be the length. However, it is desirable that the inner surface of the large-diameter conduit H be an annular microporous metal.

In the embodiment shown in FIG. 15, the same points as those in the embodiment shown in FIG. A closed space slot 41 for functioning the virtual heat pipe 20 </ b> A is formed in the upper mold 40. The diameter and length of the closed space slot 41 are determined by the thickness of the mold, the volume of the injection molded body, or the cross-sectional area of the extruded molded body depending on the extrusion speed.
.., Gn arranged around the wall surface of the closed space long hole 41 are uniformly formed around the closed space long hole 41. Are located. At the upper end of the center of each of the parallel thin tubes G1, G2,..., Gn, a steam reservoir J for collecting steam that evaporates when the working fluid 24 receives the heat input 26 is provided. Below the center thereof, a large-diameter pipe H is formed in which heat energy enters through a heat input 26 and is discharged through a heat output 27. The lower end of the parallel narrow tube G disposed around the wall surface of the closed space long hole 41 is provided with the lower end of the closed space long hole 41 above the level of the working fluid 24. The lower end of the closed space slot 41 is also provided at the lower end of the large-diameter pipe H above the liquid level of the hydraulic fluid 24.

  A plurality of fins 29a, 29c of about 1 to 10 are separated by washers 29b, 29d from the male screw 28 of the bolt head 28a of the bolt, and the fins 29a, 29c and washers 29b, 29d are separated by washers 29b, 29d. The heat sink 30 is configured. The heat sink 30 is provided in a coolant space 53 provided between the coolant path 52a and the coolant path 52b.

Therefore, the heat sink 30 is cooled by the plurality of fins 29a and 29c and the washers 29b and 29d, so that the closed space long hole 41 can be cooled and the upper mold 40 can be cooled.
Here, a combination of the microporous structure metal C, the spiral thin tube D, the center line E, the vapor reservoir F, the parallel narrow tube G, the large diameter conduit H, the vapor reservoir J, etc. In this case, these may be arbitrarily combined.

Next, the upper mold 40, the closed space long hole 41 formed therein, and the refrigerant space 53 disposed in the refrigerant passages 52a and 52b will be described with reference to FIGS.
In the present embodiment, a female O-ring 39 made of copper or a copper alloy is arranged on the opening side of the microporous structure metal C so that it can be screwed into the end of the closed space slot 41. The screw 42 is screwed and sealed. In particular, since sealing is required, it is provided so as to apply a pressing force.
Further, an O-ring 39 is disposed on the opening side of the microporous structure metal C, and an O-ring 39 is disposed on the opening side of the microporous structure metal C. May be reduced in pressure to form a volume pool for containing a predetermined amount of the working fluid 24.

These virtual heat pipes 20A are implemented as shown in FIGS.
For example, as shown in FIGS. 16 and 17, a mold 60 including an upper mold 40 and a lower mold 50 is configured. At this time, a refrigerant passage 42a and a refrigerant passage 42b for circulating a cooling medium and other refrigerant passages (not shown) are provided in the closed space long hole 41, and the entire cavity of the upper mold 40 is cooled to a predetermined temperature. I have. The injection molded body 70 has an arc-shaped base 71 having a predetermined width, and four needle-like projections 72, 73, 74, 75 provided on the outer side thereof. Similar to the upper mold 40, the lower mold 50 is provided with a refrigerant path 52 and a refrigerant path (not shown) to cool the entire lower mold 50. The mold 60 composed of the upper mold 40 and the lower mold 50 is designed to be uniformly cooled as a whole.
The “cooling medium (refrigerant = cooling water)” passing through the refrigerant paths 42 a and 42 b is mostly cooling water and is used to cool the mold 60. On the other hand, the heat pipe 90 described later contains a working fluid, and substitute Freon, water, and the like are used.

Usually, the four needle-like projections 72, 73, 74, 75 form two central needle-like projections from the base 71 when the molten resin flows toward the tips of the needle-like projections 72, 73, 74, 75. The molten resin flows into the portions 73 and 74. At this time, heat gradually flows (transmits) from the molten resin to the upper mold 40, and the heat of the molten resin is taken away, and the fluidity rapidly deteriorates.
As a result, a situation may occur in which the molten resin does not turn around at the tips of the two needle-like projections 73 and 74 provided at the center of the cavity of the upper mold 40.
Usually, the spout of the injection molding machine is determined so that the heat loss of the base 71 is reduced, but in the present invention, it can be set without considering them. Hereinafter, this will be described in detail.

  In the molding die with a heat pipe function of the present embodiment, four needle-like projections 72, 73, 74, 75 for obtaining an injection molded body 70 and an arc-shaped thin base 71 are formed on the upper die 40. ing. The upper mold 40 is provided with a refrigerant passage 42a and a refrigerant passage 42b for circulating a cooling medium for lowering the temperature. The coolant path 42a and the coolant path 42b are for lowering the temperature of the mold 60 to a predetermined temperature together with a coolant path (not shown), and usually include a mold including the upper mold 40 and the lower mold 50, as described above. Water is used as the refrigerant for lowering the temperature of 60. The refrigerant of the present embodiment will be described in an example in which cooling water is assumed.

The lower mold 50 is provided with a refrigerant passage 52a and a refrigerant passage 52b. The refrigerant passages 52a and 52b lower the temperature of the lower mold 50 to a predetermined temperature together with a refrigerant passage (not shown). is there.
Further, a coolant path 52 is provided in the lower mold 50, and a coolant space 53 capable of accommodating the coolant is provided between the coolant paths 52. The coolant space 53 matches the inner surface of the coolant space 53 or is located before and after the coolant space 53. Set to distance. The refrigerant space 53 is disposed between the refrigerant passages 52a and 52b and is in the flow of the refrigerant.
In the present embodiment, the refrigerant space 53 is formed by a box of a specific size, and both ends of the refrigerant passages 52a and 52b can accommodate the refrigerant formed in the refrigerant passage 52.

The refrigerant space 53 sandwiched between the both ends of the refrigerant passages 52a and 52b does not directly mold the injection molded body 70, but cools quickly and, when it is desired to maintain its shape quickly, has less heat energy than other parts. If desired, the injection molded body 70 is cooled from the refrigerant space 53 side. The lower mold 50 forms a coolant space 53.
However, when injecting the injection-molded body 70, high-temperature and high-pressure resin is supplied, so that the expansion of the lower mold 50 cannot be ignored.

In the present embodiment, the bolt head 28a and the male screw 28 of the bolt serve as a heat-out (radiator) in which the refrigerant supplied to the refrigerant space 53 functions as a plurality of virtual heat pipes 20A. The heat energy is discharged. In the meantime, a plurality of holes for the heat pipe function are formed by multiplying metal by a metal output 3D printer, and in this embodiment, a heat sink 30 composed of four fins is formed. Note that the configuration of the injection molding die of this embodiment using a metal output 3D printer is such that the flat surfaces are sequentially started up from the bottom surface, but since the integrated ones cannot be read even if drawn, they are processed as ordinary drawings. are doing.
Further, the heatsink (heat-dissipating portion) and the heat-in (heat-receiving portion) temperature can be agitated by discharging or the like to the heat sink 30 composed of a plurality of fins.
In the present embodiment, the heat sink 30 is formed of four fins, and is formed by multi-layering a metal with a metal output 3D printer. However, the present invention is not limited to this. Not something.

Next, each operation and operation of the molding die with a heat pipe function of the present embodiment will be described.
For example, the arc-shaped thin base 71 of the injection-molded body 70 in the present embodiment needs to be hardened so that the shape does not collapse before the mold is opened. Further, when the injection molding machine has a spout on the side of the needle-shaped protrusions 72 and 75, when the molten resin filling the needle-shaped protrusion 73 and the needle-shaped protrusion 74 passes, heat energy is partially generated. May be larger.
In such a case, a mechanically necessary thickness is left on the side of the thin arc-shaped base 71 formed by the lower mold 50 within a thickness not deformed by injection pressure at the time of injection molding. To form a refrigerant space 53. In the coolant space 63, the cooling water flows through the coolant passage 52, and forms a cooling passage such as the coolant passage 52 as a part of the coolant passage 52. Further, the coolant space 53 is formed with dimensional accuracy capable of fitting to both ends, and is fastened with bolts or the like without leakage of the cooling water.

  In the refrigerant space 53 of FIGS. 12 to 17, a heat sink 30 including a plurality of fins is formed by using a lower mold 50 to lower the temperature of the medium on the heat-out (radiation) side. That is, the plurality of fins may be formed by a wire-cut electric discharge machine or a die-sinking electric discharge machine, or the lower mold 50 itself can be formed from metal particles by a metal output 3D printer. In any case, the plurality of fins are arranged at predetermined intervals. Mounting holes for inserting and fixing the virtual heat pipe 20A are formed in the plurality of fins as needed. In the present embodiment, the heat-in (heat-input) side and the heat-out (heat-dissipation) side are determined and arranged. However, the arrangement is not limited to the vertical arrangement with respect to a plurality of fins. They may be arranged with a predetermined inclination or may be arranged horizontally.

  As described above, the inner surface of the heat pipe 20 has a structure in which a capillary phenomenon occurs in the wick disposed on the inner surface. The virtual heat pipe 20A has a heat-out (radiation) side at one end that is cooled to a low temperature by, for example, heat radiation, a heat-in (heat input) side at the other end is warmed, and a working fluid is heated by heat at the heat-out side. Evaporates and moves to a low temperature part as a vapor stream. At this time, when the steam flow contacts the pipe wall of the metal pipe, the steam flow is cooled and condensed, and the condensed liquid returns to the heat-in side due to a capillary phenomenon or the like, and repeats the cycle of evaporation, movement, and condensation again. Transfers heat continuously from the hot side to the cold side.

In the embodiment of FIG. 15, the heat sink 30 is formed from metal particles by a metal output 3D printer. However, the heat sink 30 may be formed by using a thin metal plate such as a known copper plate.
The plurality of fins are made of a thin copper plate or the like arranged at predetermined vertical intervals, are in close contact with the functional part of the heat pipe 20, and are fixed at predetermined positions. Since the mass of the plurality of fins is small, even if only the function of the heat pipe 20 is fixed, there is no sliding. However, a ring having a predetermined thickness may be provided as a spacer so that no movement occurs between the fins.

16 and 17 show a molding die with a heat pipe function according to an embodiment of the present invention.
For example, as shown in FIGS. 16 and 17 of the above embodiment, a mold 60 including an upper mold 40 and a lower mold 50 is configured. The injection molded body 70 has an arc-shaped base 71 having a predetermined width, and four needle-like projections 72, 73, 74, 75 provided on the outer side thereof. Similarly to the upper mold 40, the lower mold 50 is provided with a refrigerant passage 52a, a refrigerant passage 52b, and a refrigerant passage (not shown), and cools the entire lower mold 50. The mold 60 composed of the upper mold 40 and the lower mold 50 is designed to be uniformly cooled as a whole.

Refrigerant paths 52a and 52b are provided in the lower mold 50, and a refrigerant space 53 is formed in the refrigerant paths 52a and 52b to serve as a flow path for the refrigerant.
In the present embodiment, the refrigerant space 53 is formed as a box of a specific size by a metal output 3D printer, and the ends of the refrigerant passages 52a and 52b are formed as the refrigerant space 53 capable of accommodating the formed refrigerant. 53 and the refrigerant passages 52a and 52b are formed densely so that the refrigerant does not leak.

The refrigerant space 53 capable of accommodating the refrigerant is for directly molding the injection-molded body 70, and is used for cooling quickly and maintaining its shape quickly, and for reducing heat energy consumption compared with other parts. Cooling or heating is performed from the 53 side. Here, only cooling will be described.
The refrigerant supplied from the refrigerant paths 52a and 52b to the refrigerant space 53 is discharged from the opposite side of the refrigerant paths 52a and 52b. In the embodiment, the heat sink 30 composed of four fins is formed. Further, in the present embodiment, the heat sink 30 is formed of four fins, and is formed by multi-layering a metal with a metal output 3D printer. It is not limited.

Next, the functions of the virtual heat pipe 20A used in the present embodiment will be summarized.
The lower end of the illustrated virtual heat pipes 20A is a heat-out (radiator) and the upper end is a heat-in (evaporator), which is cooled by the heat-out and discharged from the refrigerant path 52. Specifically, the upper end of the virtual heat pipe 20A has an injection molded body 70, and when the injection molded body 70 is cooled, the injection molded body 70 side constitutes a heat receiving part on the heat-in side. Here, the heat of the injection molded body 70 is used for evaporating the working fluid, and the vapor of the working fluid at this time moves in the closed space long hole 41 formed in the upper mold 40. At this time, the wick contacts the wall surface of the closed space elongated hole 41 formed in the upper mold 40 and the wick, where the vapor changes into a liquid and returns to the working fluid. The working fluid 24 condensed in contact with the wall surface of the closed space slot 41 formed in the upper mold 40 and the wick dissipates heat by heat-out (radiator), and the condensed working fluid is returned by capillary action such as the wick. Rise. As described above, the temperature of the injection molded body 70 is cooled by the plurality of virtual heat pipes 20A.

Next, the operation of the virtual heat pipe 20A and the operation of the mold 60 will be described.
For example, the arc-shaped thin base 71 of the injection-molded body 70 in the present embodiment needs to be hardened so that the shape does not collapse before the mold is opened. Further, when the injection molding machine has a spout on the side of the needle-shaped protrusions 72 and 75, when the molten resin filling the needle-shaped protrusion 73 and the needle-shaped protrusion 74 passes, heat energy is partially generated. May be larger. In such a case, a mechanically necessary thickness is left within a thickness that is located on the arc-shaped thin base 71 side of the lower mold 50 and is not deformed by the injection pressure at the time of injection molding. A coolant space 65 is formed. In the refrigerant space 53, cooling water flows through the refrigerant passage 52, and forms cooling passages such as the refrigerant passages 52a and 52b as part of the refrigerant passage 52a and the refrigerant passage 52b.

  The coolant space 53 is provided in the lower mold 50, and is provided with the virtual heat pipe 20A and the heat sink 30 including a plurality of fins. The function of the heat pipe 20 and the heat sink 30 composed of a plurality of fins are formed by laminating metal particles using a metal output 3D printer on the lower mold 50 itself. In any case, the plurality of fins are arranged at predetermined intervals. In the present embodiment, the virtual heat pipe 20A is disposed with the heat-in (heat input) side and the heat-out (radiation) side determined, but is limited to a vertical arrangement with respect to the plurality of fins of the heat sink 30. Not something. They may be arranged with a predetermined inclination or may be arranged horizontally.

  As described above, the inside surface of the virtual heat pipe 20A has a structure in which a capillary phenomenon occurs in the wick disposed on the inside surface by the metal output 3D printer. In the virtual heat pipe 20A, for example, the heat-out side at one end is cooled by heat radiation to a low temperature, the heat-in side at the other end is heated, and the working fluid evaporates by heating on the heat-out side, It flows and moves to the low-temperature part. At this time, when the vapor flow contacts the tube wall of the closed space long hole 41 formed in the upper mold 40, the vapor flow is cooled and condensed, and the condensed liquid returns to the heat-in side by a capillary phenomenon or the like, and again, The cycle of evaporation, transfer, and condensation is repeated to transfer heat continuously from the high temperature side to the low temperature side.

  The molding die with a heat pipe function of the above-described embodiment cools the injection molding 70 formed by laminating the injection molding 70 for molding a synthetic resin with metal powder, and the injection molding 70 or the injection molding 70. Heat pipes 42a, 42b, 52a, and 52b formed in the mold 60 and the heat paths are thermally coupled to the coolant paths 42a, 42b, 52a, and 52b, so that heat can be freely transferred to the mold 60. 20A, the virtual heat pipe 20A omits the metal pipe 21 constituting the virtual heat pipe 20A, has one end as a closed space long hole 41 formed in a mold 60, and the other end disposed on the refrigerant path side. To seal the working fluid 24 and to continuously move the working fluid 24 from the low temperature side to the high temperature side.

  The molding die with a heat pipe function according to the above-described embodiment includes a refrigerant passage 42a for cooling an injection molded body 70 formed in a metal mold 60 formed by laminating an injection molded body for molding a synthetic resin. The heat pipe functional component that is thermally coupled to the coolant path and that is capable of freely transferring heat to the mold 60 omits the metal pipe 21 that forms the virtual heat pipe 20A, and has one end. Is a closed space elongated hole 41 provided in the mold 60, and the other end is disposed on the side of the refrigerant passages 42a, 42b, 52a, 52b to seal the working fluid 24. It has only one.

Therefore, the mold 60 carries the function of the metal pipe 21 as the function of the virtual heat pipe 20A. In particular, since the injection molded body 70 is formed by lamination with metal powder, the working fluid 24 is continuously transferred from the low temperature side to the high temperature side. Is formed at the time of molding, the number of components constituting the function of the virtual heat pipe 20A is reduced, and the elongated hole formed in the mold can be formed into a thin shape. It can also be arranged on the mold 60.
Further, since the surface of the inner wall 23 of the closed space long hole 41 is formed in the mold 60, the heat conduction is good and the loss of heat energy is reduced. Further, since the cooling is performed by the function of the virtual heat pipe 20A, the heat radiation efficiency can be improved as compared with the radiation due to the normal heat conduction.
The virtual heat pipe 20 </ b> A is located on the wall surface side inside the closed space long hole 41 formed in the mold 60, and continuously moves the working fluid 24 sealed by capillary action from the low temperature side to the high temperature side, In addition, the working fluid 24 boils, the vapor moves from the high-temperature side (heat-in) to the low-temperature side (heat-out), and the vapor condenses, so that the heat of condensation is released in the condensing section. .

  The heat pipe 20 of the molding die with a heat pipe function according to the present embodiment is a closed space formed in a metal mold 60 that is formed by metal powder that continuously evaporates the working fluid 24 and condenses the working fluid 24. A wick for continuously moving the working fluid 24 enclosed by capillary action from the low temperature side to the high temperature side, and the working fluid 24 is boiled. Since the steam moves from the high-temperature side (heat-in) to the low-temperature side (heat-out) and the steam condenses, the heat of condensation is released in the condensing section. Since the inner surface of the closed space long hole 41 formed in the mold 60 formed can continuously and efficiently perform the evaporation of the working fluid 24 and the condensation of the working fluid 24, the inner surface of the closed space long hole 41 is located on the wall surface side in the closed space long hole 41. And the enclosed hydraulic fluid 24 A wick that continuously moves from the low temperature side to the high temperature side due to capillary action, and the working fluid 24 boils, and the vapor moves from the high temperature side (heat-in) to the low temperature side (heat-out), and the vapor condenses. Thereby, the heat of condensation is efficiently released in the condensation section. A wick for continuously moving the hydraulic fluid 24 from the low temperature side to the high temperature side is formed in the microporous metal C on the wall surface of the closed space long hole 41 formed in the mold 60.

In addition, the injection molded body 70 for molding the synthetic resin according to the above-described embodiment has been described as a whole with the mold 60 formed by lamination molding with metal powder and injection molding. It is not restricted to the molded body 70 but can be used for an extruded molded body.
The closed space slot 41 provided in the mold 60 includes the upper mold 40 and / or the lower mold 50 or the cavity or the core, and is not restricted by the arrangement.
Further, the refrigerant passages 42a, 42b, 52a, 52b are thermally coupled to the mold 60 including the upper mold 40 and / or the lower mold 50 or the cavity or the core, and transfer heat to the mold 60. This includes those that have been made freely.

The wick for continuously moving the working fluid 24 from the low-temperature side to the high-temperature side is formed on the wall surface of the closed space long hole 41 formed in the mold 60 with a microporous structure metal. Since the wick for continuously moving from the low temperature side to the high temperature side is formed of the microporous structure metal, the sense of unity between the mold 60 and the wick of the microporous structure metal C is strong, and the thermal efficiency can be increased.
The wick for continuously moving the working fluid 24 from the low-temperature side to the high-temperature side may be a communicating microporous metal C located on the entire inner surface of the wall surface side in the closed space long hole 41 formed in the mold 60. One or more spiral thin tubes located on the wall surface side in the closed space long hole 41 and the central line E are formed by combining the central line at the end, or the wall side inside the closed space long hole 41. , And a central conduit E that is integrated at the ends.

  In the molding die with a heat pipe function of the present embodiment, the wick for continuously moving the working fluid 24 from the low-temperature side to the high-temperature side is formed on the entire inner surface on the wall surface side in the closed space elongated hole 41 formed in the mold 60. Or one or more spiral thin tubes D located on the wall surface side in the closed space long hole 41 and a central conduit E formed by combining the central conduits E at the ends. The mold 60 and the length of the closed space, since the parallel space is formed of a plurality of parallel thin tubes located on the wall surface side in the closed space long hole 41 and a central conduit E gathered at the ends. A wick that has good conduction with the wall surface side in the hole 41 and continuously moves the enclosed working fluid 24 from the low temperature side to the high temperature side by capillary action, and the steam in which the working fluid has boiled is on the high temperature side (heat-in). From the heat to the cold side (heat out) Rukoto can.

A heat sink 30 for cooling the injection molded body 70 or the extruded molded body is disposed on the side of the refrigerant passages 42a, 42b, 52a, 52b of the virtual heat pipe 20A. Therefore, since the heat sink 30 for cooling the injection molded body 70 or the extruded molded body is disposed on the side of the refrigerant passages 42a, 42b, 52a, 52b, the thermal efficiency can be increased.
In addition, the mold 60 is formed by laminating an injection molded body or an extruded molded body for molding a synthetic resin with a metal powder, but when implementing the present invention, the components may be partially assembled. .
The ratio of the closed space slot 41 of the mold 60 to the male screw 28 and the bolt head 28a can be arbitrarily set. In addition, although the closed space slot 41 provided in the mold 60 has been described as an example in which the function of the single-stage heat pipe 20 is provided, when the present invention is implemented, the refrigerant paths 42a, 42b, 52a, The function of the virtual heat pipe 20A of two stages can be provided in series from 52b.

FIG. 18 and FIG. 19 illustrate another embodiment.
As shown in FIG. 18A, the reciprocating rod 101 is an operating rod of the robot hand 100 and moves the robot body 104 in the left-right direction in the drawing. The reciprocating operation of the reciprocating rod 101 is connected to a pair of auxiliary rods 103a and 103b that are pivotally supported at the tip of the reciprocating rod 101. The other ends of the pair of auxiliary rods 103a, 103b are connected to a pair of hands 102a, 102b that are rotatably supported. Therefore, the reciprocating operation of the reciprocating rod 101 changes the rotation angle of the pair of auxiliary rods 103a and 103b, opens and closes the hand pair 102a and 102b, and holds or releases a desired article by the gripping force.

However, when the hand pair 102a, 102b is opened and closed and a desired article is held or released by the gripping force, if the hand pair 102a, 102b is made of metal, the desired article is scratched or damaged. . Otherwise, if the robot has a proper holding force, an appropriate external force required for reciprocating movement between the robot body 104 and the reciprocating rod 101 is limited to a limited range, and it is difficult to control the force. .
Therefore, as shown in FIG. 18 (b), it is desirable to cover and use an outer cover 200 which is an injection-molded body made of synthetic resin (synthetic rubber is also possible). In this case, since the thickness of the outer cover 200 changes depending on the location, the conventional technology cannot cope with the problem. However, when the virtual heat pipe 20A is used as in the embodiment of the present invention, the manufacturing can be simplified, and further, the correspondence can be simplified.

That is, FIG. 19A is a conceptual view simplified by appropriately omitting the mold 60.
As shown in the drawing, refrigerant paths 201a and 201b, refrigerant paths 202a and 202b, and a refrigerant path 203 are formed in parallel with the mold 60. The refrigerant paths 201a and 201b and the refrigerant path 203 are not different from those in the related art. The virtual heat pipes 20a and 20b are formed in the refrigerant paths 202a and 202b with a smaller diameter than the refrigerant paths 202a and 202b.
FIG. 19A illustrates an example in which one virtual heat pipe 20a, 20b is provided. However, in the case of implementing the present invention, two or more virtual heat pipes 20a or 20b are further provided. Many can be arranged. In particular, the virtual heat pipe 20a and the virtual heat pipe 20b are disposed in the refrigerant passages 201a and 201b, the refrigerant passages 202a and 202b, and the refrigerant passage 203 in parallel with the mold 60, and have smaller diameters than those. By increasing the number of heat pipes 20a or virtual heat pipes 20b and increasing the density thereof, it is possible to set various temperature control conditions as shown in FIG.

The virtual heat pipe 20A is formed by laminating the refrigerant paths 201a and 201b, the refrigerant paths 202a and 202b, the refrigerant path 203, the virtual heat pipe 20a, and the virtual heat pipe 20b with the same metal powder material using metal powder. Therefore, even if the virtual heat pipes 20a and 20b are thin, a space for flowing the working fluid 24 can be secured.
When water is used as the working fluid 24, the ends of the coolant passages 201a and 201b, the coolant passages 202a and 202b, and the coolant passage 203 are made common, and the common working fluid 24 can be water. Even when not using water, a common hydraulic fluid 24 can be used.

  Further, since the virtual heat pipe 20A is directly formed in the mold 60, the metal pipes constituting the virtual heat pipe 20A are omitted, and one end is formed as a closed space elongated hole 41 formed in the mold 60. The ends are disposed on the side of the refrigerant passages 42a, 42b, 52a, 52b, the refrigerant passages 201a, 201b, the refrigerant passages 202a, 202b, and the refrigerant passage 203, and the working fluid 24 is sealed, so that the virtual heat pipe 20A is formed. Since the number of components constituting the mold is reduced, the closed space long hole 41 formed in the mold 60 can be formed in a thin shape, and it does not take up space.

  The molding die with a heat pipe function of the above-described embodiment is a mold 60 in which an injection molded body or an extruded molded body for molding a synthetic resin is laminated and molded with metal powder, and the injection molded body or the extruded molded body is cooled. The coolant paths 42a, 42b, 52a, 52b, the coolant paths 201a, 201b, the coolant paths 202a, 202b, and the coolant path 203 formed in the mold 60 are thermally coupled to the coolant paths 42a, 42b, 52a, 52b. And a virtual heat pipe 20A capable of freely transferring heat to the mold 60. The heat pipe 20 is formed by lamination with metal powder, and has refrigerant paths 42a, 42b, 52a, 52b and refrigerant paths 201a, 201b. The mold 60 can be cooled by branching from the refrigerant passages 202a and 202b and the refrigerant passage 203.

  Therefore, since the virtual heat pipe 20A is provided to be branched from the refrigerant paths 42a, 42b, 52a, 52b, the refrigerant paths 201a, 201b, the refrigerant paths 202a, 202b, and the refrigerant path 203, the hydraulic fluid containing water is provided. By using 24, the temperature of the entire mold 60 can be made uniform. Further, the cooling capacity can be arbitrarily set depending on the part of the mold 60.

  The molding die with a heat pipe function of the above-described embodiment is a mold 60 in which an injection molded body or an extruded molded body for molding a synthetic resin is laminated and molded with metal powder, and the injection molded body or the extruded molded body is cooled. The refrigerant passages 42a, 42b, 52a, 52b, the refrigerant passages 202a, 202b, and the refrigerant passages 42a, 42b, 52a, 52b, and the refrigerant passages 202a, 202b, which are formed in the metal mold 60, are thermally connected to each other. The heat pipe 20 includes a heat pipe 20 that allows heat to move freely with respect to the mold 60. The virtual heat pipe 20A is formed by lamination with the same material as the mold 60, and is formed from the refrigerant paths 42a, 42b, 52a, 52b, and the refrigerant paths 202a, 202b. Can also have a small diameter.

  Therefore, since the virtual heat pipe 20A is formed by laminating and molding the same material as the mold 60, the virtual heat pipe 20A can be easily three-dimensionally expressed by a metal output 3D printer. Since it has a small diameter, it can be formed in a large number in the mold 60, and can have characteristics in accordance with the characteristics of the injection molded product or the extruded product.

  The molding die with a heat pipe function of the above-described embodiment is a mold 60 in which an injection molded body or an extruded molded body for molding a synthetic resin is laminated and molded with metal powder, and the injection molded body or the extruded molded body is cooled. The refrigerant passages 42a, 42b, 52a, 52b, the refrigerant passages 202a, 202b, and the refrigerant passages 42a, 42b, 52a, 52b, and the refrigerant passages 202a, 202b, which are formed in the metal mold 60, are thermally connected to each other. A virtual heat pipe 20A capable of freely transferring heat to the mold 60. The virtual heat pipe 20A has a closed space elongated hole 41 formed at one end of the mold 60 by omitting a metal pipe constituting the heat pipe 20. The other end may be disposed on the refrigerant passages 42a, 42b, 52a, 52b and the refrigerant passages 202a, 202b to seal the working fluid 24.

  Accordingly, the heat pipe functional component 20A directly forms a portion corresponding to the metal pipe of the virtual heat pipe 20A in the mold 60 by omitting the metal pipe constituting the heat pipe 20, and the other end thereof includes the refrigerant paths 42a and 42a. Since the hydraulic fluid 24 is provided and sealed on the 42b, 52a, and 52b sides to provide a heat pipe function, it is not necessary to insert a thin metal pipe, and the mold 60 can be easily formed.

  The molding die with a heat pipe function of the above-described embodiment is a mold 60 in which an injection molded body or an extruded molded body for molding a synthetic resin is laminated and molded with metal powder, and the injection molded body or the extruded molded body is cooled. The refrigerant passages 42a, 42b, 52a, 52b, the refrigerant passages 202a, 202b, and the refrigerant passages 42a, 42b, 52a, 52b, and the refrigerant passages 202a, 202b, which are formed in the metal mold 60, are thermally connected to each other. A heat pipe 20 capable of freely transferring heat to the mold 60, omitting a metal pipe constituting the heat pipe 20, having one end as a closed space long hole 41 provided in the mold 60, and the other end on the refrigerant path side. This is a structure that is disposed and seals the working fluid 24, and has only the virtual heat pipe 20A.

  Therefore, when the heat sink 30 for cooling the injection molded body or the extruded body is provided on the other end side of the closed space long hole 41 of the mold 60, the heat energy up to the mold 60 moves through the heat sink 30. The injection molding or the extrusion molding can be cooled. Cooling of the heat sink 30 is rapidly performed because heat is directly transferred to the upper mold 40 on the fixed side and the lower mold 50 on the movable side. The heat sink 30 may be formed as a part of the mold 60 by forming fins by a metal output 3D printer, or may be externally assembled and tightened with bolts or the like to improve heat conduction. It is desirable that the surface of the fin be cooled by the flow of the cooling medium, but it may be exposed to the air as air cooling. In practicing the present invention, the form of the heat sink 30 does not matter.

  The wick for continuously moving the working fluid 24 of the molding die with a heat pipe function from the low-temperature side to the high-temperature side in the above-described embodiment has a fine porous structure metal ( Since the wick for continuously moving the working fluid 24 from the low-temperature side to the high-temperature side is formed of the microporous metal), the mold 60 and the wick of the microporous metal are formed. Has a strong sense of unity and can increase thermal efficiency.

The wick for continuously moving the working fluid 24 of the molding die with a heat pipe function from the low temperature side to the high temperature side in the above-described embodiment is provided on the entire inner surface of the wall surface side in the closed space long hole 41 formed in the mold 24. A metal pipe having a communicating microporous structure located therein, or a central pipe having one or more spiral thin pipes located on the wall surface side in the closed space long hole 41 and a central pipe thereof combined at an end portion, It is composed of one of a plurality of parallel thin tubes located on the wall surface side in the closed space elongated hole 41 and a central pipeline integrated at the end, so that the mold 60 and the wall surface side in the elongated hole 41 are formed. A wick that continuously transfers the enclosed working fluid 24 from the low temperature side to the high temperature side by capillary action, and that the steam in which the working fluid boils heat moves from the high temperature side to the low temperature side because of good conduction with the Can be.
The virtual heat pipes 20A, 20a, and 20b of the molding die according to the above-described embodiment include a heat sink that cools the injection-molded or extruded body on the side of the refrigerant path 203, the refrigerant paths 201a and 201b, and the refrigerant paths 202a and 202b. Since 30 is provided, thermal efficiency can be increased.

Although the virtual heat pipes 20A, 20a, and 20b are expressed as a portion corresponding to the metal pipe 21 of the heat pipe 20 in the related art, they do not show the metal pipe 21 itself of the heat pipe 20 and are formed by a metal output 3D printer. Is what is done. Therefore, when carrying out the present invention, the metal pipe 21 of the heat pipe 20 is not provided.
Further, a closed space slot 41 and a closed space slot whose one end is thermally coupled to the refrigerant passages 53, 42a, 42b, 52a, and 52b, and the other end is thermally coupled to the mold 60 (40, 50). The heat pipe function component that allows the heat transfer from the mold 60 (40, 50) in which the working fluid 24 repeats vaporization and liquefaction to the refrigerant passages 53, 42a, 42b, 52a, and 52b in the interior 41 due to design reasons. , The upper mold 40 becomes the lower mold 50 and / or the mold 60.

And when simplifying the heat pipe functional component when implementing this invention, the structure of a heat pipe can be made to be formed by a metal output 3D printer.
Further, the refrigerant passages 53, 42a, 42b, 52a, and 52b also specify locations where one ends of the virtual heat pipes 20A, 20a, and 20b are arranged. It is determined.

A Mesh wick B Ripple wick C Microporous metal
D Spiral thin tube E Center line F, J Vapor reservoir G Parallel thin tube H Center line 20A Virtual heat pipe 30 Heat sink 40 Upper mold 41 Sealed space long holes 42a, 42b Refrigerant path 50 Lower mold 52a, 52b Refrigerant path 201a, 201b Refrigerant path 202a, 202b Refrigerant path 203 Refrigerant path 53 Refrigerant space 60 Mold 70 Injection molded body 71 Base 72, 73, 74, 75 Needle-like projection

Claims (8)

A mold formed by laminating an injection molded body or an extruded body for molding a synthetic resin with metal powder,
A refrigerant passage formed in the mold for cooling the injection molded body or the extrusion molded body,
One end is thermally coupled to the coolant path, and the other end is thermally coupled to the mold. Heat transfer from the mold to the coolant path in the enclosed space in which the working fluid repeats vaporization and liquefaction. With a heat pipe function component that allows
The molding die with a heat pipe function, wherein the heat pipe functional component is formed by lamination with the metal powder, and is thermally branched from the coolant path to cool the die. A mold formed by laminating an injection molded body or an extruded body for molding a synthetic resin with metal powder,
A refrigerant passage formed in the mold for cooling the injection molded body or the extrusion molded body,
One end is thermally coupled to the coolant path, and the other end is thermally coupled to the mold. Heat transfer from the mold to the coolant path in the enclosed space in which the working fluid repeats vaporization and liquefaction. With a heat pipe function component that allows
The molding die with a heat pipe function, wherein the heat pipe functional component is formed by lamination with the same material as the die and has a smaller diameter than the refrigerant passage. A mold formed by laminating an injection molded body or an extruded body for molding a synthetic resin with metal powder,
A refrigerant passage formed in the mold for cooling the injection molded body or the extrusion molded body,
One end is thermally coupled to the coolant path, and the other end is thermally coupled to the mold. Heat transfer from the mold to the coolant path in the enclosed space in which the working fluid repeats vaporization and liquefaction. With a heat pipe function component that allows
The heat pipe functional component, the metal pipe constituting the heat pipe functional component is omitted, one end is a long hole formed in the mold, and the other end is disposed on the refrigerant path side to supply the working fluid. A molding die with a heat pipe function, which is sealed. A mold formed by laminating an injection molded body or an extruded body for molding a synthetic resin with metal powder,
A refrigerant passage formed in the mold for cooling the injection molded body or the extrusion molded body,
One end is thermally coupled to the coolant path, and the other end is thermally coupled to the mold. Heat transfer from the mold to the coolant path in the enclosed space in which the working fluid repeats vaporization and liquefaction. With a heat pipe function component that allows
The heat pipe functional component, the metal pipe constituting the heat pipe functional component is omitted, one end is a long hole formed in the mold, and the other end is disposed on the refrigerant path side to supply the working fluid. A molding die with a heat pipe function, comprising a wick for sealing and continuously moving the working fluid from a low temperature side (heat out) to a high temperature side (heat in).   The heat pipe functional component is located on the wall surface side inside the elongated hole formed in the mold, and continuously moves the working fluid sealed by capillary action from a low temperature side to a high temperature side; and The liquid boils, the vapor moves from a high temperature side (heat-in) to a low temperature side (heat-out), and the vapor is condensed, so that heat of condensation is released in a condensing section. The molding die with a heat pipe function according to any one of claims 1 to 4.   The wick for continuously moving the hydraulic fluid from the low temperature side to the high temperature side is formed of a metal having a microporous structure (porous) on a wall surface of a long hole formed in the mold. 5. The molding die with a heat pipe function according to any one of 5.   The wick for continuously moving the hydraulic fluid from the low-temperature side to the high-temperature side may be a communicating microporous structure metal (porous) located on the entire inner surface on the wall side in the elongated hole formed in the mold, or One or more spiral thin tubes located on the wall surface side in the elongated hole and a central pipeline gathered at the end, or a plurality of parallel thin tubes located on the wall surface side in the elongated hole; The molding die with a heat pipe function according to any one of claims 1 to 6, wherein the molding die comprises any one of a central pipeline integrated at an end portion.   The molding with a heat pipe function according to any one of claims 1 to 7, wherein a heat sink for cooling the injection molded body is provided on the refrigerant path side of the heat pipe functional structure. Mold.

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