JP2012061826A - Molding device and molding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology capable of enhancing working efficiency, in a molding technology in which a mold is heated by a heating means.SOLUTION: In (b), a coil 80 is provided to be close to an outer side face 62 of a mold 60 and to an outer side face 52 of a mold 50 in a state that the mold 60 is separated from the mold 50 by a prescribed dimension L1. A coil 100 is provided to be close to an outer side face 63 of the mold 60 and to an outer side face 53 of the mold 50 in a state that the mold 60 is separated from the mold 50 by the prescribed dimension L1. That is, the coil 80 and the coil 100 are arranged in parallel to opening and closing directions of the mold 50 and the mold 60, and the mold 60 is thereby free from an anxiety of touching with the coils 80, 100 when opening the mold. Consequently, the working efficiency is enhanced in this molding device in which the mold 50 and the mold 60 are heated by the heating means 70.

Description

  The present invention relates to a molding technique for obtaining a molded product using a pair of molds heated by a heating means.

  In die casting or injection molding, a molten material is injected into a mold cavity, and the molten material is cooled and solidified to obtain a molded product. When injecting molten material, if the fluidity of the material decreases, the material solidifies before reaching the corners of the cavity. This leads to insufficient filling of the material and leads to a decrease in the quality of the molded product, and therefore measures to promote the fluidity of the material are required.

  Conventionally, in order to promote the fluidity of materials, various types of molding apparatuses that have taken such measures have been proposed (see, for example, Patent Document 1 (FIG. 3b)).

Patent document 1 is demonstrated based on the following figure.
FIG. 7 is a diagram for explaining the basic configuration of the conventional technique. The molding apparatus 200 includes an upper mold 201, a lower mold 202, and an outer wall surface of the upper mold 201 so as to surround the outer periphery of the upper mold 201 and the lower mold 202. 203 and a high frequency induction coil 205 disposed close to the outer wall surface 204 of the lower mold 202 and a high frequency power source connected to the high frequency induction coil 205.

  FIG. 8 is a diagram for explaining the operation of the conventional molding technique. In a state where the upper mold 201 is separated from the lower mold 202, a current is passed through the high frequency induction coil 205 by a high frequency power source, and a magnetic field is generated by the high frequency induction coil 205. . When a momentary magnetic field is generated, an eddy current is generated in the upper mold 201 as indicated by an arrow (1), and an eddy current is generated in the lower mold 202 as indicated by an arrow (2). Since the upper mold 201 and the lower mold 202 have electric resistance, Joule heat is generated by eddy current and electric resistance, and the upper mold 201 and the lower mold 202 are heated by this heat. If the upper mold 201 and the lower mold 202 are heated before the molten material is injected into the cavity, the fluidity of the material is increased, so that molding defects can be eliminated.

  Incidentally, the high frequency induction coil 205 is wound close to the outer wall surface 203 of the upper mold 201 and the outer wall surface 204 of the lower mold 202. Therefore, when the upper mold 201 is further raised for mold opening, it is necessary to take measures so that the high-frequency induction coil 205 does not interfere with the movement of the upper mold 201, which is not convenient.

  Therefore, a molding technique that can further improve workability is required.

Special table 2007-535786

  This invention makes it a subject to provide the technique which can improve workability | operativity more in the shaping | molding technique which heats a metal mold | die with a heating means.

  The invention according to claim 1 is a molding apparatus for obtaining a molded product using a pair of molds heated by a heating unit, wherein the heating unit is parallel to the opening and closing direction of the pair of molds. A pair of high-frequency induction coils provided in proximity to one outer surface of the mold and the other outer surface of the pair of molds, the ring portions wound in a ring shape facing each other, and A high-frequency power source connected to a high-frequency induction coil and supplying a current to the high-frequency induction coil.

  The invention according to claim 2 is a molding method implemented by a molding apparatus including a high-frequency power source and a pair of high-frequency induction coils, and a molding apparatus including a fixed mold and a movable mold, wherein the heating means In a molding method for obtaining a molded product using the fixed mold and the movable mold heated in a mold separation state maintaining step of maintaining the movable mold in a state separated from the fixed mold by a predetermined dimension; One outer surface of the fixed mold and one outer surface of the movable mold that are parallel to the movable direction of the movable mold, the other outer surface of the fixed mold, and the other outer surface of the movable mold. Coil arrangement in which the pair of high-frequency induction coils are arranged close to each other such that the pair of high-frequency induction coils are close to each other and the ring portions wound in a ring shape among these high-frequency induction coils face each other. Then, a current is passed through the pair of high frequency induction coils by the high frequency power source, a magnetic field is generated in the fixed mold and the movable mold, and an eddy current is generated in the fixed mold and the movable mold. A heating step of heating the fixed mold and the movable mold with the generated Joule heat, and when the temperature of the fixed mold and the movable mold reaches a predetermined temperature, the movable mold is attached to the fixed mold. A mold clamping process for clamping the mold together, a material injection process for injecting a material in a molten state into the cavities of the fixed mold and the movable mold, and a molded product cooled and solidified in the cavity. For this purpose, the method includes a mold opening step of separating the movable mold from the fixed mold.

  In the invention according to claim 1, the pair of high frequency induction coils are adjacent to one outer surface of the pair of molds parallel to the opening / closing direction of the pair of molds and the other outer surface of the pair of molds. Is provided. That is, since the pair of high-frequency induction coils are arranged in parallel with the opening / closing direction of the pair of molds, there is no concern that the movable mold will hit the high-frequency induction coils when the mold is opened. Therefore, in the molding apparatus that heats the mold with the heating means, it is possible to provide an apparatus that can further improve workability.

  In the invention according to claim 2, the molding method is a method implemented by a molding apparatus including a heating tool including a high-frequency power source and a pair of high-frequency induction coils, and including a stationary mold and a movable mold, This is a method of obtaining a molded product using a fixed mold and a movable mold heated by a heating means. The molding method includes a mold separation state maintaining process, a coil arranging process, a heating process, a mold clamping process, a material injection process, and a mold opening process.

  In the coil placement step, one outer surface of the stationary mold and one outer surface of the movable mold, which are parallel to the movable direction of the movable mold, and the other outer surface of the stationary mold and the other outer surface of the movable mold. A pair of high frequency induction coils are placed close to the side surfaces, and the pair of high frequency induction coils are arranged so that the ring portions wound in a ring shape a plurality of times in these high frequency induction coils face each other.

  That is, since the pair of high frequency induction coils are arranged in parallel to the opening / closing direction of the mold, there is no concern that the movable mold will hit the high frequency induction coil when the mold is opened. Therefore, in the molding method in which the mold is heated by the heating means, a method that can further improve workability can be provided.

It is a front view of the shaping | molding apparatus which concerns on this invention. FIG. 2 is an enlarged view of part 2 of FIG. 1. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. It is a figure explaining an effect | action until a fixed metal mold | die and a movable metal mold | die are heated. It is a figure explaining the effect | action after a mold opening. It is a flowchart of the shaping | molding method which concerns on this invention. It is a figure explaining the basic composition of the conventional technology. It is a figure explaining the effect | action of the conventional shaping | molding technique.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals. In the following description, an injection molding machine is applied to the molding apparatus, and an injection molding method is applied to the molding method.

Embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the injection molding machine 10 is arranged at the rear of the bed 11 so as to face the mold clamping device 12 (described later in detail) arranged at the front of the bed 11 and the mold clamping device 12. The injection device 31 (details will be described later). The pair of molds provided in the mold clamping device 12 includes a fixed mold 50 (details will be described later) and a movable mold 60 (details will be described later).

  The mold clamping device 12 includes a stationary platen 14 attached to a central support 13 standing at the center of the bed 11, and a stationary mold attached to the front end of the stationary platen 14 via a stationary side attachment plate 15. 50, a support member 17 attached to the front end support 16 standing on the front end of the bed 11, four tie bars 18 attached to the fixed plate 14 and the support member 17, and a horizontal direction to these tie bars 18 A movable plate 19 slidably attached to the movable platen 19, a movable mold 60 attached to the rear end of the movable platen 19 via the movable side attachment plate 21, and a protruding pin attached to the front end of the movable platen 19. A protruding cylinder 22 that pushes out (described later) and a clamping cylinder 23 that connects the central support 13 and the movable platen 19 are provided.

  In addition, an automatic take-out robot 24 that is movable in a three-dimensional direction is attached to the upper end of the fixed platen 14. The automatic take-out robot 24 is a robot responsible for taking out the resin molded product protruding from the movable mold 60.

  The injection device 31 includes an injection cylinder 33 provided on a slide mechanism 32 attached to the rear portion of the bed 11, a heating cylinder 34 attached to the front end of the injection cylinder 33 and incorporating a screw, and the heating cylinder 34. A nozzle 35 that is attached to the front end of the fixed mold 50 and contacts the material injection port of the fixed mold 50, a hopper 36 that is attached on the rear end of the heating cylinder 34 and stores the resin material supplied into the heating cylinder 34, and an injection cylinder 33. A screw drive motor 37 that is attached to the rear end and rotates the screw, a screw moving mechanism 38 that is arranged at the rear of the injection cylinder 33 and moves the screw in the horizontal direction, and the central support 13 and the slider 39 of the slide mechanism 32 are connected. And an injection device moving cylinder 41.

  Since the slider 39 moves along the rail 42 toward the mold clamping device 12 by the pulling operation of the injection device moving cylinder 41, the nozzle 35 can be brought into contact with the material injection port of the fixed mold 50.

In addition, the control device 43 controls the operations of the protruding cylinder 22, the clamping cylinder 23, the automatic take-out robot 24, the screw drive motor 37, the screw moving mechanism 38, and the injection device moving cylinder 41.
Furthermore, a heating means 70 (described later in detail) for heating the fixed mold 50 and the movable mold 60 is provided on the left side of the fixed platen 14 and the fixed mold 50. The structure of the heating means 70 will be described with reference to FIG.

  As shown in FIG. 2, the heating means 70 includes a left ring portion 71 (detailed later) that is attached to the left side surface 25 of the fixed platen 14 via a left heat insulating material 72 and wound in a ring shape a plurality of times. A high-frequency induction coil 80 (described later in detail) is connected to a lower end 81 of the left high-frequency induction coil 80 via a left lower pipe 82 and is connected to an upper end 83 of the left high-frequency induction coil 80 on the left. A high-frequency power supply 90 that is connected via an upper pipe 84 and applies a current to the left high-frequency induction coil 80. The high frequency power supply 90 is an AC power supply.

Further, a chiller unit 91 is connected to the left lower pipe 82 and the high frequency power supply 90.
Inside the left high frequency induction coil 80, cooling water always flows, and the left high frequency induction coil 80 is cooled with this cooling water. Since the cooling water that has returned from the left high-frequency induction coil 80 to the high-frequency power supply 90 has been heated, it is cooled by the refrigerant inside the chiller unit 91 and flows again into the left high-frequency induction coil 80. That is, the cooling water circulates through the left high frequency induction coil 80, the high frequency power supply 90, and the chiller unit 91.

  In addition, in the left high frequency induction coil 80, the fixed mold 50 and the movable mold 60 moved to the position indicated by the imaginary line by the pulling operation of the clamping cylinder (FIG. 1, reference numeral 23) are within the inner diameter D1. It is formed to fit. A dimension between the fixed mold 50 and the movable mold 60 indicated by an imaginary line is L1, and this dimension L1 indicates a predetermined dimension set before heating the fixed mold 50 and the movable mold 60. The fixed mold 50 is provided with a concave fixed-side cavity surface 51, and the movable mold 60 is provided with a convex movable-side cavity surface 61.

  In addition to the left high-frequency induction coil 80, the heating means 70 also includes a right high-frequency induction coil that is formed with the same dimensions as the left high-frequency induction coil 80 and is arranged coaxially. Next, the structure of the heating means 70 will be described in detail with reference to FIG.

  As shown in FIG. 3, the heating means 70 is configured such that the fixed mold 50 and the movable mold 60 indicated by an imaginary line are separated from each other by a predetermined dimension L <b> 1 (see FIG. 2). A left high-frequency induction coil 80 having a left ring portion 71 provided close to the left outer surface 52 and the movable mold left outer surface 62 of the movable mold 60 and wound seven times in a ring shape, and the fixed mold 50 A right high-frequency induction coil 100 having a right ring portion 92 that is provided close to the right outer surface 53 of the fixed mold and the movable outer right surface 63 of the movable mold 60 and is wound seven times in a ring shape; The high-frequency power supply 90 is connected to the left high-frequency induction coil 80 and the right high-frequency induction coil 100 and supplies a current to the left high-frequency induction coil 80 and the right high-frequency induction coil 100. That is, the heating means 70 is an induction heating device.

  In addition, although the winding number of the left ring part 71 and the right ring part 92 was 7 in the Example, you may decide arbitrarily. Since the magnetic force becomes stronger as the number of windings is increased, it is preferable to increase the number of windings.

The fixed mold left outer surface 52, the movable mold left outer surface 62, the fixed mold right outer surface 53, and the movable mold right outer surface 63 are parallel to the opening and closing directions of the fixed mold 50 and the movable mold 60, respectively. Surface.
The right high-frequency induction coil 100 is attached to the right side surface 26 of the fixed platen 14 via a right heat insulating material 95.

  The left high-frequency induction coil 80 and the right high-frequency induction coil 100 are a pair of high-frequency induction coils in which the left ring portion 71 and the right ring portion 92 face each other. Further, the left high-frequency induction coil 80 and the right high-frequency induction coil 100 are formed with the same inner diameter D <b> 1 and are disposed on the same shaft 101.

  Further, the high-frequency power supply 90 is connected to the lower end 102 of the right high-frequency induction coil 100 via the right lower pipe 103, and the right upper pipe 105 is connected to the upper end 104 of the right high-frequency induction coil 100. Connected through. The cooling water circulates through the right high-frequency induction coil 100, the high-frequency power supply 90, and the chiller unit 91, and the cooling water that has returned to the high-frequency power supply 90 is cooled by the chiller unit 91.

The operation of the injection molding machine 10 described above will be described next.
As shown in FIG. 4A, the left ring portion 71 of the left high frequency induction coil 80 and the right ring portion 92 of the right high frequency induction coil 100 face each other, and the left ring portion 71 and the right ring portion 92 A fixed mold 50 is disposed between them. The movable mold 60 is directed to the fixed mold 50 as indicated by the arrow (3).

  As shown in (b), the movement of the movable mold 60 is stopped in a state of being separated from the fixed mold 50 by a predetermined dimension L1. When a current is passed through the left high-frequency induction coil 80 and the right high-frequency induction coil 100 by a high-frequency power source (FIG. 3, reference numeral 90) and a certain moment is taken, a magnetic field is generated as indicated by arrows (4) and (5). . Due to the generation of this magnetic field, an eddy current is generated in the fixed mold 50 as indicated by an arrow (6), and an eddy current is generated in the movable mold 60 as indicated by an arrow (7).

  Since the fixed mold 50 and the movable mold 60 have electric resistance, Joule heat is generated by the eddy current and the electric resistance, and the fixed mold 50 and the movable mold 60 are heated by this heat. The heating of the fixed mold 50 and the movable mold 60 is performed immediately before mold clamping. Next, the operation after the resin molded product is molded and the mold is opened will be described with reference to FIG.

  As shown in FIG. 5A, the movable mold 60 is separated from the fixed mold 50, and the resin molded product 106 is attached to the movable side cavity surface 61 of the movable mold 60. That is, the mold is open.

  (B) is a cross-sectional view taken along the line bb of (a), and the left high-frequency induction coil 80 and the right high-frequency induction coil 100 are arranged on the left and right of the movable mold 60. There are no obstacles. Therefore, after the resin molded product 106 protrudes from the movable mold 60 and protrudes with the pin 107, the resin molded product 106 can be smoothly taken out from above by the automatic take-out robot (FIG. 1, reference numeral 24).

  As shown in FIG. 4B, the left high-frequency induction coil 80 includes the movable mold 60 on the left outer surface 62 of the movable mold 60 in a state where the movable mold 60 is separated from the fixed mold 50 by a predetermined dimension L1. The fixed mold 50 is provided close to the fixed mold left outer surface 52. Further, the right high-frequency induction coil 100 includes the movable mold 60 on the right outer surface 63 of the movable mold 60 and the fixed mold of the fixed mold 50 in a state where the movable mold 60 is separated from the fixed mold 50 by a predetermined dimension L1. It is provided close to the right outer surface 53.

That is, since the left high-frequency induction coil 80 and the right high-frequency induction coil 100 are arranged in parallel to the opening and closing directions of the fixed mold 50 and the movable mold 60, the movable mold 60 is subjected to high-frequency induction when the mold is opened. There is no worry of hitting the coils 80, 100. Therefore, in the injection molding machine (FIG. 1, reference numeral 10) that heats the fixed mold 50 and the movable mold 60 with the heating means 70, an apparatus that can further improve workability can be provided.
Next, an injection molding method performed using the injection molding machine 10 will be described.

  As shown in FIG. 6, in step (hereinafter referred to as ST) 01, the movable mold is kept away from the fixed mold by a predetermined dimension. Specifically, as shown in FIG. 4B, the movement of the movable mold 60 is stopped in a state where it is separated from the fixed mold 50 by a predetermined dimension L1.

  In ST02, one outer surface of the fixed mold and one outer surface of the movable mold that are parallel to the movable direction of the movable mold, the other outer surface of the fixed mold, and the other outer surface of the movable mold A pair of high frequency induction coils are brought close to each other. Further, the pair of high frequency induction coils are arranged so that the ring portions wound a plurality of times in a ring shape face each other.

  Specifically, as shown in FIG. 4B, the left high-frequency induction coil 80 is brought close to the movable mold left outer surface 62 of the movable mold 60 and the fixed mold left outer surface 52 of the fixed mold 50. . Further, the right high frequency induction coil 100 is brought close to the movable mold right outer surface 63 of the movable mold 60 and the fixed mold right outer surface 53 of the fixed mold 50. Further, the left high-frequency induction coil 80 and the right high-frequency induction coil 100 are arranged so that the left ring portion 71 and the right ring portion 92 wound seven times in a ring shape face each other. Further, the left high-frequency induction coil 80 and the right high-frequency induction coil 100 are formed with the same inner diameter D1 and disposed on the same shaft 101 as shown in FIG.

  In ST03, a current is passed through a pair of high-frequency induction coils from a high-frequency power source, a magnetic field is generated in the fixed mold and the movable mold, eddy currents are generated in the fixed mold and the movable mold, and the obtained Joule heat is fixed. Heat the mold and the movable mold.

  Specifically, as shown in FIG. 4B, when a current is passed through the left high-frequency induction coil 80 and the right high-frequency induction coil 100 by a high-frequency power source, a magnetic field is generated as indicated by arrows (4) and (5). appear. Due to the generation of this magnetic field, an eddy current is generated in the fixed mold 50 as indicated by an arrow (6), and an eddy current is generated in the movable mold 60 as indicated by an arrow (7). Since the fixed mold 50 and the movable mold 60 have electric resistance, Joule heat is generated by the eddy current and the electric resistance, and the fixed mold 50 and the movable mold 60 are heated by this heat.

  In ST04, when the temperature of the fixed mold and the movable mold reaches a predetermined temperature, the movable mold is aligned with the fixed mold and clamped. Specifically, in FIG. 1, when the temperature of the fixed mold 50 and the movable mold 60 reaches a predetermined temperature, the clamping cylinder 23 is caused to perform a pulling operation. Since the piston rod 108 of the mold clamping cylinder 23 is pulled, the movable mold 60 is aligned with the fixed mold 50 to perform mold clamping.

  In ST05, a molten material is injected into the cavities of the fixed mold and the movable mold that are clamped. Specifically, in FIG. 3, after the movable mold 60 is clamped to the fixed mold 50, the molten material is injected into the cavity from the material injection port 109 of the fixed mold 50.

  In ST06, in order to take out the molded product cooled and solidified in the cavity, the movable mold is separated from the fixed mold. Specifically, as shown in FIG. 5A, the movable mold 60 is separated from the fixed mold 50. Since the resin molded product 106 is attached to the movable side cavity surface 61 of the movable mold 60, the resin molded product 106 protrudes and protrudes with the pins 107.

  In FIG. 3, the injection molding method includes a heating means 70 including a high frequency power supply 90, a left high frequency induction coil 80, and a right high frequency induction coil 100, and an injection molding including a fixed mold 50 and a movable mold 60. This is a method carried out by a machine, and is a method for obtaining a molded product using the fixed mold 50 and the movable mold 60 heated by the heating means 70.

  In FIG. 6, the injection molding method includes a mold separation state maintaining process (ST01), a coil arranging process (ST02), a heating process (ST03), a mold clamping process (ST04), a material injection process (ST05), Mold opening process (ST06).

  In the coil placement step, as shown in FIG. 4B, the left high-frequency induction coil 80 is moved to a movable mold left outer surface 62 and a fixed mold left outer surface 52 that are parallel to the movable direction of the movable mold 60. Close to. Further, the right high frequency induction coil 100 is brought close to the movable mold right outer surface 63 and the fixed mold right outer surface 53 which are parallel to the movable direction of the movable mold 60. Further, the left high-frequency induction coil 80 and the right high-frequency induction coil 100 are arranged so that the left ring portion 71 and the right ring portion 92 wound seven times in a ring shape face each other.

  That is, since the left high-frequency induction coil 80 and the right high-frequency induction coil 100 are arranged in parallel to the opening and closing directions of the fixed mold 50 and the movable mold 60, the movable mold 60 is subjected to high-frequency induction when the mold is opened. There is no worry of hitting the coils 80, 100. Therefore, in the molding method in which the fixed mold 50 and the movable mold 60 are heated by the heating means 70, a method that can further improve workability can be provided.

The molding apparatus according to the present invention is applied to an injection molding machine in the embodiment, but can also be applied to a die casting apparatus.
In addition, the molding method according to the present invention is applied to the injection molding method in the embodiment, but can also be applied to a die casting method.

Moreover, although the pair of high frequency induction coils according to the present invention are arranged on the left and right of the mold clamping device in the embodiment, they may be arranged on the upper and lower sides of the mold clamping device.
Furthermore, although the attachment position of the high frequency induction coil according to the present invention is the side surface of the fixed platen in the embodiment, it may be the side surface of the movable platen or the bed. Moreover, you may attach a high frequency induction coil to the front-end | tip of the robot arm provided separately from the shaping | molding apparatus.
In addition, the shape of the high frequency induction coil according to the present invention is a ring shape (see FIG. 2) in the embodiment, but may be an elliptical shape or a square shape. However, it is essential that the fixed mold and the movable mold are accommodated inside the ellipse and inside the square.

  The molding technique of the present invention is suitable for heating a mold used in the injection molding technique.

  DESCRIPTION OF SYMBOLS 10 ... Molding apparatus (injection molding machine), 50 ... Fixed mold, 52 ... One outer surface (fixed mold left outer surface), 53 ... The other outer surface (fixed mold right outer surface), 60 ... Movable mold Mold 62 ... one outer surface (movable mold left outer surface), 63 ... the other outer surface (movable mold right outer surface), 70 ... heating means, 71 ... ring part (left ring part), 80 ... high frequency Induction coil (left high-frequency induction coil), 90... High-frequency power supply, 92... Ring part (right ring part), 100... High-frequency induction coil (right high-frequency induction coil), 106. Predetermined dimensions.

Claims (2)

In a molding apparatus for obtaining a molded product using a pair of molds heated by a heating means,
The heating means includes
Provided in proximity to one outer surface of the pair of molds parallel to the opening and closing direction of the pair of molds and the other outer surface of the pair of molds, and wound in a ring shape a plurality of times A pair of high-frequency induction coils with ring portions facing each other;
A high-frequency power source connected to these high-frequency induction coils and supplying a current to the high-frequency induction coils;
A molding apparatus comprising: A molding method that includes a heating unit including a high-frequency power source and a pair of high-frequency induction coils, and is implemented by a molding apparatus that includes a fixed mold and a movable mold,
In the molding method for obtaining a molded product using the fixed mold and the movable mold heated by the heating means,
A mold separation state maintaining step for maintaining the movable mold in a state of being separated from the fixed mold by a predetermined dimension;
One outer surface of the fixed mold and one outer surface of the movable mold that are parallel to the movable direction of the movable mold, the other outer surface of the fixed mold, and the other outer surface of the movable mold. A coil arrangement step of arranging the pair of high frequency induction coils so that the pair of high frequency induction coils are brought close to a side surface and the ring portions wound in a ring shape among these high frequency induction coils face each other. When,
A current is passed through the pair of high-frequency induction coils by the high-frequency power source, a magnetic field is generated in the fixed mold and the movable mold, and an eddy current is generated in the fixed mold and the movable mold. A heating step of heating the fixed mold and the movable mold with heat;
A mold clamping step of clamping the movable mold to the stationary mold when the temperature of the stationary mold and the movable mold reaches a predetermined temperature; and
A material injection step of injecting a material in a molten state into the cavities of the fixed mold and the movable mold that are clamped;
A mold opening step for separating the movable mold from the fixed mold in order to take out the molded product cooled and solidified in the cavity;
A molding method comprising:

Images