JP5346700B2 - Method for constructing metal particle three-dimensional network structure in resin material and resin molded article having the metal particle three-dimensional network structure constructed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve an excellent molding function and accuracy by coating a molding resin with a metal mesh-like member, and implanting metal particles from the outside to efficiently transfer heat from a heat source and resin molding energy as heat and to quickly uniform the internal temperature of the molding resin material to a molding temperature. <P>SOLUTION: A surface layer part of the resin molding material is coated with the metal mesh-like member, and the metal particles are implanted almost perpendicularly to arrange the metal particles by closest packing. A magnetic field is applied in a direction penetrating the resin molding material. A chain-like or conical aggregate is thereby formed in the resin material with a magnetic pole surface as a starting surface and with a wire intersecting part of the metal mesh-like member as a starting point to construct a three-dimensional mesh structure with the metal particles. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a method for constructing a metal particle three-dimensional network structure in a resin material and a resin molded product having the metal particle three-dimensional network structure, and particularly, a resin material that imparts a high thermal conductivity function to a resin material to be molded. The present invention relates to a method for constructing a metal particle three-dimensional network structure and a resin molded article having the metal particle three-dimensional network structure constructed therein.

A synthetic resin molded product refers to a part or product produced by a processing method in which a synthetic resin material imparted with fluidity by melting, melting, or the like is given a shape substantially equal to that of a final product and solidified to be taken out.
The synthetic resin materials used for this molding have unique properties that differ depending on the type of the material. Further, even in one synthetic resin material, the properties greatly change for each process such as a melting process and a process of imparting and solidifying a shape.
In order to produce a synthetic resin molded product at a high speed and maintain the accuracy of the molded product, it is necessary to mold by a molding method suitable for the properties of the synthetic resin material.
For example, in the melting process and the solidifying process of the synthetic resin material, it is necessary to select an appropriate method according to the properties of the synthetic resin material. That is, from various methods such as a method of melting and solidifying by heating and cooling, a method of dissolving by a solvent and solidifying by volatilization and removal of the solvent, or a method of causing a curing reaction by mixing a fluid synthetic resin and a curing agent It is necessary to select a material suitable for the properties of the synthetic resin material.
In addition, in the process of imparting a shape to a synthetic resin material, fluidity can be imparted to almost all synthetic resin materials regardless of the type of synthetic resin material, so that it can be easily deformed. it can. Therefore, in the process of applying the shape, it is difficult to be affected by the type of synthetic resin material, but because it is affected by the applied molding force and the shape to be molded, the method and shape for applying the molding force are specified. It is necessary to select the most suitable method.

By the way, the synthetic resin is a polymer and has a characteristic of viscoelasticity. This viscoelasticity means having both properties as a fluid and properties as a solid. Depending on the type and state of the synthetic resin, the proportion of properties as a liquid and the proportion of properties as a solid respectively It changes (deformation behavior of viscoelastic body).
Therefore, in order to obtain a good molded product, it is necessary to grasp the deformation behavior of the viscoelastic body in the synthetic resin material, the memory phenomenon of the resin, and the relationship with the secular change.

In each process of melting, imparting fluidity, imparting a shape, and solidifying a synthetic resin material, transfer of thermal energy is greatly involved. That is, in order to melt or solidify the synthetic resin material, it is necessary to give heat energy by a heat source or take heat energy by a cooling source. Therefore, in order to manufacture a synthetic resin molded product with high molding accuracy, it is necessary to perform optimal thermal energy transfer in each process.
In general, a synthetic resin material has a low thermal conductivity, a high Prandtl number, and a high melt viscosity. Here, the Prandtl number is a numerical value related to the degree of the influence of the viscous force, the speed, and the relative thickness of the temperature boundary layer. Therefore, in order to obtain a good molded product, it is important to evaluate and control the heat transfer in the synthetic resin material.
In other words, how quickly and accurately transfer the heat energy from the heating source (cooling source) to the surface layer of the synthetic resin material and transfer it into and out of the synthetic resin material. It is important to make the temperature uniform and to suit the temperature of each process.

Furthermore, in order to obtain a good molded product, the influence of molding shrinkage and residual stress generated in the synthetic resin material as well as the above-described viscoelastic behavior of the synthetic resin material cannot be ignored. This is because if this molding shrinkage is non-uniform and concentrated locally, or if the residual stress accumulates and concentrates, molding defects and a reduction in molding accuracy may occur.
Most of these molding failure manifestation factors such as molding shrinkage and residual stress are associated with a common characteristic of polymer synthetic resins that heat transfer is difficult due to “low thermal conductivity and high Brandtl number”.
In the synthetic resin material, there is a large temperature difference between the surface layer (outer peripheral layer), which is a contact interface that transfers heat energy from a heating source (cooling source), and the intermediate layer in the material. Due to this temperature difference, the physical and chemical characteristics of the polymer synthetic resin in the surface layer and the intermediate layer are greatly different. This difference in physical and chemical properties is the basic cause of defective molding.
Therefore, heat transfer between the surface layer and the intermediate layer must be performed quickly, and the temperature in the molding material must be made uniform quickly.

In order to impart this high thermal conductivity function to synthetic resin materials, it is common to improve the molecular structure of the synthetic resin itself or to knead the synthetic resin with metal particles having high thermal conductivity. It is.
For example, an epoxy resin composition, a prepreg, a laminate, and a printed wiring board disclosed in Patent Document 1 have been proposed for improving the molecular structure of the resin as in the former. The epoxy resin composition disclosed in Patent Document 1 contains an epoxy resin monomer, a dihydric or higher phenol having a hydroxyl group disposed at least in the ortho position, or a compound thereof, and a curing accelerator. It is possible to provide a cured product having high thermal conductivity.
In addition, as a material for kneading metal particles and the like in the latter synthetic resin, a molding resin having excellent thermal conductivity and fluidity disclosed in Patent Document 2 has been proposed. The molding resin disclosed in Patent Document 2 is a molding material generally called a composite, and by blending and kneading a thermally conductive inorganic particulate filler with a synthetic resin, the fluidity unique to the synthetic resin is obtained. High thermal conductivity can be imparted while maintaining

JP2003-137971 JP2008-144094

  The present invention does not improve the molecular structure of the resin itself as in the epoxy resin composition disclosed in the above-mentioned Patent Document 1, and even a composite such as the molding resin disclosed in the above-mentioned Patent Document 2. Instead, the resin is coated with a metal mesh-like member and the metal particles are driven by mechanical force from the outside, thereby giving a high thermal conductivity function to the resin molding from an angle completely different from these techniques. Then, the surface of the resin molding material is the closest packing in which the metal particles are in contact with each other, and the metal particles are embedded in the resin molding material while being in contact with each other. The direct contact ensures the heat transfer action, efficiently transfers the heat from the heat source, quickly equalizes the temperature in the molded resin material, and further in the latter half of the shape imparting process and the solidification process. A method for constructing a three-dimensional network structure with metal particles with high thermal conductivity and ferromagnetism that efficiently transfers and releases the molding energy accumulated in the molded resin material as heat and realizes the function and accuracy of excellent molded products, and An object of the present invention is to provide a resin molded product in which the metal particle three-dimensional network structure is constructed.

  In order to achieve such an object, the present invention is a method of constructing a metal particle three-dimensional network structure in a resin material made of metal particles, which is formed by intersecting metal wires that are ferromagnetic and have high thermal conductivity. The metal mesh member mounting step for attaching the metal mesh member to all or part of the resin molding material mainly made of synthetic resin, and the surface of the resin molding material coated with the metal mesh member before and after the metal mesh member mounting step In addition, a metal particle distribution process for distributing metal particles that are ferromagnetic and high thermal conductor, and a pressure is locally applied from above the distributed metal particles, and the metal particles are arranged in a close-packed manner on the surface of the resin molding material. At the same time, the resin molding material is melted by transferring heat energy between the pressure application step of embedding the metal particles in a continuous state in contact with each other from the surface of the resin molding material and the resin molding material. And a magnetic field is applied so that a magnetic field line is generated in a direction penetrating the resin molding material to form an aggregate of chain-shaped or cone-shaped metal particles inside the resin molding material. And a metal particle three-dimensional network construction step for constructing a three-dimensional network structure.

  Further, according to the method for constructing a metal particle three-dimensional network structure in the resin material in the present invention, in order to obtain further effects, the melting step and the metal particle three-dimensional network structure constructing step are performed under vacuum conditions. Preferably it is a feature.

  Further, according to the resin molded product in which the metal particle three-dimensional network structure in the present invention is constructed, a resin molded material mainly composed of a synthetic resin, and a metal particle that is a ferromagnetic and high thermal conductor contained in the resin molded material And a metal net-like member that is formed by crossing a metal wire that is a ferromagnetic material and a high thermal conductor and that covers all or a part of the resin molding material. A three-dimensional network structure is constructed in the interior.

According to the present invention, a preformed product that is a molding material used for molding a resin molded product is configured as follows. That is, the preform is made of a resin molding material mainly composed of a synthetic resin, metal particles that are a ferromagnetic material and a high heat conductor contained in the resin molding material, and a metal material that is a ferromagnetic material and a high heat conductor. It has a metal net-like member formed by crossing wires and covering all or part of the resin molding material.
The metal particles are embedded in the horizontal direction in the surface layer portion of the resin molding material covered with the metal mesh member, and are embedded in the resin molding material in an inward contact state. ing.
Furthermore, when a magnetic field is applied so that a magnetic force line is generated in a direction penetrating the resin molding material after the resin molding material is melted, the metal particles move along the direction of the magnetic force line in the fluidized resin molding material. It moves to form a chain-like or cone-like aggregate starting from the intersection of the metal mesh members.
From the above, these chain-like or cone-like aggregates form a three-dimensional network structure with metal particles in the resin molding material, so that heat energy can be exchanged quickly and uniformly between the preform and the heat transfer source. It is possible to eliminate the local non-uniformity of temperature and form a good molded product.
In general, in the shape imparting / solidifying step, energy due to molding pressure accumulates in the resin molding material. According to the present invention, as described above, since a three-dimensional network structure with metal particles that are high thermal conductors is built in the resin molding material, the energy accumulated in the resin molding material is used as heat energy in a short time. Can be released. As a result, it becomes possible to suppress the expression of the memory phenomenon due to the viscoelastic behavior in the shape imparting / solidifying step, and to mold a good molded product with improved reliability over time of the resin.

It is a figure for demonstrating implantation of a metal particle in the preform in this Embodiment. In this Embodiment, it is a figure which shows the state which applied the magnetic field, after melt | dissolving the preformed article and making it fluidity | liquidity. It is a side view which shows the preformed product of each process of the construction method of the three-dimensional network structure by the metal particle in embodiment of this invention, Comprising: (a) shows the process of attaching a metal net-like member to a resin molding material, ( b) shows a step of driving metal particles into the resin molding material, and (c) shows a step of melting the preform 10 and applying a magnetic field. It is side surface sectional drawing of the preform in the normal conditions which air exists.

<Basic structure>
In the present embodiment, the final molded object is obtained by giving a predetermined shape to the preformed product 10 with a mold or the like while transferring heat energy from a heat transfer source such as a heat source or a cooling source. A resin molded product 100 is obtained.
FIG. 1 is a diagram for explaining the implantation of metal particles 12 in the preform 10 according to the present embodiment.
FIG. 2 is a diagram showing a state in which a magnetic field is applied after the preformed product 10 is melted to increase fluidity in the present embodiment.
Hereinafter, the basic structure of the preform 10 will be described in detail with reference to the drawings.
In the drawings used to describe the present embodiment, including this drawing, the vertical direction is the vertical direction and the horizontal direction is the horizontal direction in the drawing.

The preformed product 10 includes a fluid resin molding material 11 having a high viscosity before solidification mainly made of a synthetic resin, metal particles 12 kneaded or distributed in the resin molding material 11, and the resin molding material 11. And a metal net member 13 covering all or part of the surface.
In FIG. 1, the metal mesh member 13 is not shown in order to make the movement of the metal particles 12 easy to understand. The metal mesh member 13 is an essential component for the preformed product 10 in the present embodiment.
Further, in these drawings, the metal particles 12 are all expressed in spherical shapes (circular cross-sections) having substantially the same size, but are only for explaining the close-packing, and the size and shape thereof are described here. It is not limited to. That is, the shape and size of the metal particles 12 are different and may vary. However, it is assumed that the metal particles 12 are arranged in close contact with each other on the surface of the resin molding 11.

The resin molding material 11 is a fluid resin material with a high viscosity before solidification composed mainly of a synthetic resin. This synthetic resin may be either a thermoplastic resin or a thermosetting resin.
Moreover, the resin molding material 11 may be comprised only with a synthetic resin, and the compound by which the metal particle 12 and also the other reinforcing material and filler were knead | mixed uniformly may be sufficient as it.

The metal particles 12 are high thermal conductor and ferromagnetic metal particles. That is, a high thermal conductor having a much higher thermal conductivity than general synthetic resins, such as iron, cobalt, or nickel, and a ferromagnetic metal that moves along the direction of generation of magnetic field lines under the influence of a magnetic field Particles.
When the preform 10 is manufactured, the metal particles 12 are not simply kneaded into the resin molding material 11, but are always subjected to a “driving” operation from the surface of the resin molding material 11 to the inside (center portion). Pushed vertically downward.

Specifically, this “driving” is performed as follows. First, metal particles 12 are spread on the surface of a fluid resin molding material 11 having a high viscosity before solidification. Then, for example, a pressure is locally applied in a substantially vertical downward direction from above the distributed metal particles 12 with a roller or the like to be pushed into the resin molding material 11.
When this operation is repeated, the surface of the resin molding material 11 on which the metal particles 12 are distributed is arranged with the metal particles 12 being almost closely packed. That is, the metal particles 12 are arranged in contact with each other.
On the other hand, in the internal direction of the resin molding material 11, the metal particles 12 are connected in a state of being in contact with each other from the surface on which the above-described metal particles 12 are arranged in the closest packing.

By the way, in the present embodiment, it is indispensable to apply a predetermined pressure to the metal particles 12 “locally”, that is, to an extremely small area. There is a reason.
When the metal particles 12 are repeatedly spread and pressed, the metal particles 12 are arranged in the closest packing on the surface of the resin molding material 11 as described above, and new metal particles 12 are no longer on the surface of the resin molding material 11. There is almost no space left for entry. In this state, when the metal particles 12 are further distributed and pressure is applied locally, the metal particles 12 to which the pressure is applied are embedded in the resin molding material 11 in a substantially vertical downward direction. In addition, the newly embedded metal particles 12 come into contact with the already embedded metal particles 12 and are pushed into the resin molding material 11 vertically downward.
As a result, the state shown in the drawing, that is, the state in which the metal particles 12 are in contact with each other and are pushed into the resin molding material 11 in the substantially vertical downward direction is maintained.
If no pressure is applied locally, that is, if pressure is uniformly applied to the entire surface of the resin molding material 11, the newly distributed metal particles 12 are closest to the surface of the resin molding material 11. Since the metal particles 12 arranged by filling are pushed substantially vertically downward, the metal particle 12 layer in the vicinity of the surface of the resin molding material 11 is only thickened as a whole. No connection to the inside of the resin molding material 11 by 12 is formed.
Since the metal particles 12 are driven in the inner direction in a continuous manner in this manner, the metal particles 12 play an important role in the construction of a three-dimensional network structure using metal particles, which will be described later. It is an essential condition to apply pressure.

In FIG. 1, the direction of pressure transmission when a pressure is locally applied to the metal particles 12 is indicated by arrows.
As shown in the figure, when a pressure is locally applied to the metal particles 12 arranged on the surface of the resin molding material 11 in a substantially vertical downward direction, the pressure is applied to the metal particles 12 to which the pressure is applied. It is transmitted to other metal particles 12 that are in contact with and located below. When there are a plurality of metal particles 12 that are in contact with each other below, the component of the applied pressure is transmitted to each of the plurality of metal particles 12.
When there are a plurality of metal particles 12 that are in contact with the metal particles 12 above the transmission destination, the respective pressures are transmitted, and the resultant force is applied to the metal particles 12 that are in contact with the metal particles 12 below the transmission metal particles 12. introduce.
As described above, the locally applied pressure is transmitted, so that the metal particles 12 are driven into the resin molding material 11 as described above.

  In the state where the metal particles 12 are driven into the resin molding material 11 as described above and the resin molding material 11 is melted and the viscosity is lowered, the magnetic field is applied so that the magnetic lines of force penetrate the preform 10. 2, the metal particles 12 start to move and gather in a chain shape with the magnetic pole surface as the starting surface, as shown in FIG. Here, the magnetic pole surface refers to the surface of the magnetic pole to which a magnetic field is applied.

When a magnetic field is applied so that the magnetic lines of force penetrate through the preform 10 described above, the metal particles 12 arranged in the closest packing in the surface layer portion are attracted in the direction of the magnetic pole surface and keep the state as it is.
Further, among the metal particles 12 that have been driven into the resin molding material 11 or previously kneaded, the ones that are close to the magnetic pole face move toward each other in the order of the magnetic pole face, The metal particles 12 are already connected to the surface of the resin molding material 11 in the closest packing.
On the other hand, the metal particles 12 that are separated from the magnetic pole surface and are close to the other metal particles 12 that have already formed a chain-like aggregate (hereinafter simply referred to as a chain) are sequentially from the closest one. Then, they are attracted to and moved by other metal particles 12 that form the chain, and form a part of the chain.

The metal net-like member 13 is a member formed by knitting a wire of a high thermal conductor and a ferromagnetic metal (iron, cobalt, nickel, etc.) in a lattice shape or a honeycomb shape. The mesh pitch is kept constant.
The surface of the resin molding material 11 is covered with the metal net-like member 13, and the above-described driving is performed on the coated surface, and the metal particles 12 are arranged in the closest packing.
Hereinafter, the surface portion and the vicinity of the surface of the resin molding material 11 in which the metal particles 12 are arranged in the closest packing and covered with the metal net member 13 are referred to as surface layer portions.
As described above, the surface layer portion is provided with the metal particles 12 that are high heat conductors arranged in a close-packed manner, and is covered with the metal metal mesh member 13 of the high heat conductor. The conditions for transferring heat energy to and from the moving source are remarkably improved.
In addition, as described above, since the chain is formed while the metal particles 12 that are high thermal conductors are in direct contact with each other starting from the magnetic pole surface, the surface layer portion with improved boundary conditions described above, and resin molding Even between the inside of the material 11, quick and uniform heat energy is exchanged, and the preform 10 is provided with a high thermal conductivity function.

Further, by covering the surface of the resin molding material 11 with the metal net member 13, the stress resistance of the resin molded product 100 after the molding can be improved. That is, it is possible to disperse the pressure stress acting in the substantially vertical direction with respect to the resin molded product 100 and to reinforce the stress acting in the substantially horizontal direction, thereby improving the strength resistance of the resin molded product 100 as a whole. It is possible.
In addition, the surface of this metal net-like member 13 and the surface of the above-mentioned metal particle 12 shall be processed so that interface compatibility may be increased.

<Method for constructing a three-dimensional network structure with metal particles>
FIG. 3 is a side view showing a preformed product 10 in each step of the method for constructing a three-dimensional network structure with metal particles in the embodiment of the present invention. FIG. 3A shows a resin-molded material 11 and a metal mesh-like member 13. (B) shows a step of driving the metal particles 12 into the resin molding material 11, and (c) shows a step of melting the preform 10 and applying a magnetic field. Note that the example shown in this figure is merely an example.
Hereinafter, a method for constructing a three-dimensional network structure using metal particles according to the present embodiment will be described in detail with reference to FIG.
In the example of this figure, in order to simplify the explanation, the preformed product 10 and the resin molded product 100 are formed in a flat plate shape, but the shapes of the preformed product 10 and the resin molded product 100 are of course the same. It is not limited to.

  First, as shown in FIG. 3A, flat metal mesh members 13 are similarly attached to both the front and back surfaces of the flat resin molding material 11 to cover all or part of the resin molding material 11. At this time, the metal mesh member 13 is pressed against the fluid resin molding material 11 having a high viscosity before solidification, and a part of the metal mesh member 13 is embedded and attached.

Next, the metal particles 12 are distributed from above the metal mesh members 13 attached to the front and back surfaces of the flat resin molding material 11, and the pressure is locally applied to the substantially vertical direction from the distributed metal particles 12 with, for example, a roller. Apply. The metal particles 12 are embedded in the resin molding material 11 from between the meshes of the metal mesh member 13.
When the application of the metal particles 12 and the application of pressure are repeated, as shown in FIG. 3B, the metal particles 12 are arranged in a close-packed manner on the surface of the resin molding material 11 to which the application of the particles and pressure has been applied. Is done. Further, the metal particles 12 to which pressure is locally applied are embedded in the resin molding material 11, and the embedded metal particles 12 remain in contact with other metal particles 12 that have already been embedded. The resin molding material 11 is pushed into the inside, so-called “driving” is performed.

Next, the resin molding material 11 is melted by applying heat energy to the preformed product 10 from a heat transfer source, and in the direction penetrating the preformed product 10 as shown in FIG. A magnetic field is applied to generate magnetic field lines.
As a result, the metal particles 12 move in the resin molding material 11 that has melted and become fluid, and the chain is formed so as to span both surface layers along the direction of the magnetic field lines, starting from the magnetic pole surface. Form.
That is, the metal particles 12 arranged in the close-packed manner in the surface layer portion are attracted in the direction of the magnetic pole surface and maintained as they are. Among the metal particles 12 kneaded in advance in the resin molding material 11 and the metal particles 12 driven into the inside, those having a distance close to the metal particles 12 in the surface layer portion are in order from the closest to the surface layer portion. The metal particles 12 are attracted to the metal particles 12 and become part of the metal particles 12 forming the surface layer portion.
Here, the metal mesh member 13 is formed by knitting wires arranged non-parallel to each other, for example, in a lattice shape. However, as shown in FIG. Between the members 13, the interval d1 between the points where the wires intersect is narrower than the interval d2 between the other metal net members 13.
Therefore, assuming that the magnetic field acting at the place where the preformed product 10 is installed is an equal magnetic field, a stronger magnetic force is generated between the portions where the non-parallel wires are crossed (overlapped) as compared with other portions. Therefore, the chain of metal particles 12 is formed starting from the intersection of the wires on the magnetic pole surface.
And among the metal particles 12 kneaded in advance in the resin molding material 11 and the metal particles 12 driven into the inside, those that are separated from the metal particles 12 in the surface layer portion, and those that are close to the chain are In order from the nearest one, the metal particles 12 forming the chain are attracted to form a part of the chain.

  Thus, since the chain of the metal particles 12 is mainly formed at the intersection of the mesh of the metal mesh member 13, the chain is also formed in the horizontal direction by regularly and constantly configuring the mesh pitch of the metal mesh member 13. A regular network is formed at regular intervals, and a three-dimensional network structure is formed by the metal particles 12 in the preform 10 (resin molded product 100). As a result, heat energy can be exchanged quickly and uniformly in the preformed product 10.

  In addition, in order to form a chain regularly starting from the crossing point of the wire, it is preferable to apply a magnetic field so that an equal magnetic field is generated at the place where the preform 10 is installed.

  Further, in the process of melting the preformed product 10 and applying a magnetic field, it may be simultaneously given a shape by a mold or the like, or the resin may be solidified.

As described above, the metal particles 12 form a chain so as to span both the surface layer portions of the front and back surfaces of the preform 10, but some of the cones extend from one surface without being completely spanned. Form the body. That is, it rises from one surface into a so-called bamboo shoot shape or hangs down into a stalactite shape, and the tip of the aggregate of the metal particles 12 does not reach the other surface layer portion in the thickness direction of the preform 10. It stays in the middle.
The cone-shaped aggregate of the metal particles 12 formed in this way is composed of the metal particles 12 having excellent thermal conductivity, and the side surface has a sufficient heat passage area for transferring heat. Secured.
Therefore, even if a cone cannot be formed because the density of the metal particles 12 is low and a cone-shaped aggregate is formed, the thermal energy of the resin molding material 11 is deepened. It is possible to send and receive quickly.

<Other embodiments>
Next, the construction method of the three-dimensional network structure by the preform 10 in other embodiment and the metal particle using the same is demonstrated.

(1) Installation of vacuum chamber As another embodiment, the following configuration can be added to an instrument or an apparatus that imparts a shape to a preform 10 such as a mold.
That is, by covering these instruments and the entire apparatus in a vacuum chamber and performing deaeration in the vacuum chamber, the shape of the preform 10 is imparted and solidified under vacuum conditions.

FIG. 4 is a side cross-sectional view of the preform 10 under normal conditions where air is present.
As shown in the figure, the preform 10 has a large number of metal particles 12. Among these, in the preform 10, the space between the numerous metal particles 12 is filled with a resin molding material 11 (resin).
On the other hand, as described above, the metal particles 12 are arranged on the surface layer portion of the preformed product 10 in a state close to the closest packing, but the space (gap) between these metal particles 12 is the resin molding material 11. Air is not filled with (resin). This air is inferior in terms of thermal conductivity as compared with the metal particles 12 and the resin molding material 11 (resin).
For this reason, in the presence of normal air, the air present on both surface layers of the preformed product 10 hinders the transfer of thermal energy between the preformed product 10 and the heat transfer source, and imparts shape and solidification. May be an obstacle.
Therefore, as described above, by installing a tool or device for imparting a shape to the preformed product 10 in a vacuum chamber and imparting or solidifying the shape under a vacuum condition, the transfer of thermal energy is hindered. It is possible to eliminate air and give a good shape and solidify.

(2) Synthetic resin-made mesh member Moreover, as other embodiment, the preform 10 can be comprised as follows.
That is, in the present embodiment, the metal mesh member 13 is made of metal, but in other embodiments, the same resin as the synthetic resin used for the resin molding material 11 is molded into a mesh shape. .

According to the present embodiment, the metal particles 12 are driven in the vertical direction from between the meshes of the above-mentioned resin-made net-like member covering all or part of the resin molding material 11. Therefore, when the magnetic field is applied so that the magnetic lines of force are generated in the direction penetrating the preformed product 10 while melting the resin molding material 11 so as to have a high fluidity, the corresponding position between the meshes on the magnetic pole surface is set. A chain of metal particles 12 is formed as a starting point.
In addition, when heat energy is transferred to and from the heat transfer source and the resin molding material 11 is melted and becomes highly fluid, the resin net member is melted together with the resin molding material 11 to be finally obtained. The resin molded product 100 is formed integrally with the resin molded material 11.
When the metal mesh member 13 cannot be used for the resin molded product 100 that is the final molded product, the resin molded product 100 corresponding to various uses can be manufactured by making the mesh member resin. Can do.
In addition, the kind of synthetic resin which comprises the mesh member may be the same kind as the synthetic resin which comprises the resin molding material 11, and a different kind may be sufficient as it.

<Summary of Embodiment>
As described above, according to the present embodiment, the metal layer member 13 is coated on the surface layer portion of the preformed product 10 and the metal particles 12 driven by mechanical force from the outside are close-packed. Therefore, the boundary condition between the heat transfer source and the preform 10 can be greatly improved. In addition, since the magnetic pole surface is the starting surface and the intersection of the metal mesh member 13 is the starting point, a chain or cone-shaped aggregate is regularly formed, and the three-dimensional network structure of the metal particles 12 is constructed. The heat energy transferred quickly and uniformly between the heat transfer source and the surface layer part can also be transferred quickly and uniformly between the surface layer part and the inside (center part) of the resin molding material 11. .
Thus, since the preform 10 can exchange heat energy quickly and uniformly with the heat transfer source, the temperature of the surface layer portion that is in direct contact with the heat transfer source and the internal temperature that is not in direct contact with the heat transfer source. It becomes possible to quickly eliminate the temperature difference from the temperature. Accordingly, in the preformed product 10, the shape can be imparted and solidified at a uniform temperature as a whole without locally causing temperature unevenness, and “sledge” caused by temperature nonuniformity of the resin material. , “Sinking”, local fluidity deterioration, and the like, and localization of molding shrinkage can be prevented. In other words, unlike conventional composites that improve the molecular structure of the resin itself or mere composites, by adding the metal particles 12 and the metal net member 13 from the outside of the resin, high thermal conductivity can be added to the raw material of the resin molded product 100. Therefore, it is possible to provide a high-quality resin molded product 100 by imparting an effective function to molding.
In general, in the shape imparting / solidifying step, energy due to molding pressure accumulates in the resin molding material 11. According to the present embodiment, as described above, since the three-dimensional network structure is formed by the metal particles 12 that are high thermal conductors in the resin molding material 11, the energy accumulated in the resin molding material 11 is heated. It can be released as energy in a short time. As a result, it becomes possible to suppress the expression of the memory phenomenon due to the viscoelastic behavior in the shape imparting / solidifying step, and to mold a good molded product with improved reliability over time of the resin.

  Further, because the density of the metal particles 12 in the resin molding material 11 is low, a chain spanning between both surface layers is not formed, but a bamboo-like or stalactite-like aggregate is formed. Even in such a case, the side surface of the cone-shaped assembly secures a sufficient heat passage area for the transfer of thermal energy, so that the preform 10 has high thermal conductivity. Functions can be added.

In addition, as described above, since the three-dimensional network structure by the metal particles 12 is configured, the transmission by thermal energy transfer is made uniform and performed quickly, and the influence of local molding shrinkage and residual stress in the resin material is dispersed, The chain and the like that form the three-dimensional network structure of the metal particles can divide and disperse the influence of the resin. As a result, the memory phenomenon due to the viscoelastic behavior in the shape imparting / solidifying process is suppressed, and the resin molded product 100 It is possible to reduce molding shrinkage of the overall dimensions and shape.
In addition, since the molding energy accumulated in the molded product in the latter half of the shape imparting process and in the solidifying process is released, the occurrence of memory phenomenon and secular change is also suppressed.

Further, in the preformed product 10 in the present embodiment, the metal particles 12 are kneaded and distributed on the resin molding material 11, and the metal net member 13 covers all or part of the surface of the resin molding material 11. As a result, the strength of the entire preform 10 can be improved.
Further, since the chain and the conical aggregate of the metal particles 12 are formed starting from the overlapping portion of the wire of the metal mesh member 13, the metal mesh member 13 whose mesh pitch is uniformly adjusted is provided. By using it, the chain and the cone-shaped aggregate of the metal particles 12 can be uniformly formed at the pitch interval. Since the transfer of thermal energy is performed mainly through the chain and the conical aggregate formed at uniform intervals, the entire preform 10 is uniformly heated or cooled in each step of forming. It becomes possible.

  The above-described embodiment is an example of a preferred embodiment of the present invention. The embodiment of the present invention is not limited to this embodiment, and various modifications may be made without departing from the scope of the present invention. Is possible.

For example, when the thermal conductivity of the preform 10 is improved, the amount of the metal particles 12 to be kneaded and distributed may be increased, and the metal mesh member 13 having a narrow mesh pitch may be used. In this case, the preform 10 has a higher content ratio of the metal particles 12 having a higher thermal conductivity than the resin molding material 11, and a three-dimensional network structure is formed by fine metal particles having a narrow interval between the chains of the metal particles 12. Therefore, the thermal conductivity of the preformed product 10 is improved. In this case, the strength of the resin molded product 100 is also improved.
On the other hand, when the tensile tension (toughness) of the resin molded article 100 is improved, the metal particles 12 to be kneaded and distributed may be reduced, and the metal mesh member 13 having a wide mesh pitch may be used. In this case, since the content ratio of the resin component in the preformed product 10 is increased and a three-dimensional network structure is formed by loose metal particles having a wide interval between the chains of the metal particles 12, the toughness of the resin molded product 100 is improved. .

DESCRIPTION OF SYMBOLS 10 Preliminary molded article 11 Resin molding material 12 Metal particle 13 Metal net-like member 100 Resin molded article

Claims (3)

A metal net-like member attaching step for attaching a metal net-like member formed by intersecting metal wires, which are ferromagnetic and high thermal conductors, to all or a part of a resin molded material mainly made of synthetic resin;
Before and after the metal mesh member attaching step, a metal particle spreading step of spreading metal particles that are ferromagnetic and high thermal conductor on the surface of the resin molding material covered with the metal mesh member;
A pressure is locally applied from above the distributed metal particles, the metal particles are arranged in a close-packed manner on the surface of the resin molding material, and the metal particles are brought into contact with each other from the surface to the inside of the resin molding material. Pressure application process to be embedded in a continuous state,
A melting step of transferring thermal energy between the resin molding materials and melting the resin molding materials;
A magnetic field is applied so that magnetic lines of force are generated in a direction penetrating the resin molding material, thereby forming an aggregate of the chain-shaped or cone-shaped metal particles inside the resin molding material, thereby forming a solid by the metal particles. A method for constructing a metal particle three-dimensional network structure in a resin material, comprising: a metal particle three-dimensional network structure constructing step for constructing a network structure.   2. The method for constructing a metal particle three-dimensional network structure in a resin material according to claim 1, wherein the melting step and the metal particle three-dimensional network construction step are performed under vacuum conditions. Formed by crossing resin molding material mainly made of synthetic resin, metal particles that are ferromagnetic and high heat conductor contained in the resin molding material, and metal wire that is ferromagnetic and high heat conductor And a metal net-like member that covers all or part of the resin molding material,
The metal particles have a three-dimensional network structure built in the resin molding material.