JPS6315707A - Thermoset resin molding device having molding tool with built-in high-frequency inductor - Google Patents

Abstract

PURPOSE:To enable the theremosetting of resin to be effectively achieved in a short time by a method in which the coil (inductor) for high frequency heating is included in the mold made of insulation material, and a conductive member evolves heat, applying high frequency electric power. CONSTITUTION:The inductor 4 made of the coil of copper pipe is included in the bottom force 3 made of the insulation material such as ceramic or fluoro- plastic, etc., and a sprue 5 for injecting fluid thermosetting resin is provided in the bottom force 3. When 10KHz or higher high frequency current is applied to the inductor 4 from a high frequency generator 9, eddy current is induced on the surface of a rotor 1 and heat evolution rapidly occurs, whereby the fluid thermosetting resin 2 is set. Then, cooling water is caused to flow through the copper pipe of the inductor 4 and cools the inductor 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for efficiently and significantly shortening the curing reaction of a thermosetting resin in the molding of a thermosetting resin. Conventionally, thermosetting resins such as epoxy resins and polyester resins have been It is widely used as a molding material, but it has the disadvantages of long curing time and poor workability. When this hardens,
When heating with hot air or a sheath heater, it is necessary to heat the entire area inside the curing furnace, which results in poor thermal efficiency and requires long heating times.

This invention utilizes high-frequency induction heating to rapidly generate heat on the surface of the conductor, and by directly heating the resin in contact with the conductor, heat curing can be performed efficiently and in an extremely short time.

An example in which the present invention is applied to molding the outer surface of a rotor of a stepping motor will be described below with reference to the drawings.

FIG. 1 is a product sectional view of a rotor 1 made of a conductor and a thermosetting resin 2 molded on the outer surface thereof. In FIG. 2, an inductor 4 made of a copper pipe coil is housed in a lower mold 3 made of an insulating material such as ceramic or fluororesin. The lower mold 3 has an injection port 5 for injecting liquid thermosetting resin.

Similarly, an air vent hole 7 is formed in the upper die 6 made of an insulating material.

” - Mold (1 fully opened; if you want to improve the mold release of the cured product, apply a mold release agent, insert the rotor l, and close the upper mold 6. Liquid heat is poured from the injection port 5 by the resin discharge pump 8. Inject hardening resin into the inductor 4. High frequency generators 9 to 10 are injected into the inductor 4.
When a high frequency current of KH2 or more is applied, eddy currents are induced on the surface of the rotor 10, which rapidly generates heat, and the liquid thermosetting resin 2 is hardened. At this time, cooling water is applied to the inner diameter of the copper pipe of the inductor 4. 1, in which the inductor 4 is cooled by cooling the inductor 4. Next, a curing method will be described below with reference to FIG.

FIG. 4 shows a side cross-sectional view of a cured product made of thermosetting resin.

In FIG. 5, an inductor 1 is placed in a lower mold 12 made of an insulating material.
3 is built-in, and a plate 14 made of a conductor is attached to the resin hardening section. Also, an injection port 15 is formed.

Similarly, an inductor (8), a conductor plate (19), and an air vent hole (17) are attached to the upper mold (6) made of an insulating material.

The operation is similar to the above-mentioned example of application to a rotor, in which the upper mold and the lower mold are set, and a portion of liquid thermosetting resin is injected from the injection port 15.

Thereafter, when a high frequency current is applied to the inductors 13 and 18, the conductive plates 14 and 19 generate heat.

The thermosetting resin is cured by heating. At that time, cooling water is flowed inside the copper pipes of the inductors 13 and 18 to cool the inductors.

As explained above, in molding a thermosetting resin, the present invention has the effect of efficiently hardening and molding in an extremely short time by incorporating an inductor into the mold and providing a high-frequency chamber break.

[Brief explanation of drawings]

The figures show application examples of the present invention. Fig. 1 is a side sectional view of the product of the first application example, and Figs. 2 and 3 are a partially sectional side view and a plan sectional view of the first application example. . FIG. 4 is a side sectional view of the product of the second application example. Figure 5, Figure 6, the seventh cause is the second
They are a side sectional view, a top sectional view, and a top sectional view of an application example, respectively. 1 Rotor ll Thermosetting resin product 2
Thermosetting resin 12 Lower mold; 3 Lower mold 13 Inductor 4 Inductor
14 Conductor plate 5 Inlet
15 Inlet 6 G type 16 Upper mold 7 Air vent hole 17 Air vent hole 8 Discharge pump 18 Inductor 9 High frequency oscillator 1
9 Conductor plate patent sponsor Mutsumi Kobayashi

Claims (1)

[Claims] 1. In molding the outer surface of a conductor such as a metal with a thermosetting resin, a high-frequency heating coil (inductor) is built into the mold made of an insulating material, and the induction A thermosetting resin molding device characterized in that a conductor generates heat and hardens the resin by applying high frequency power to the conductor. 2 A high-frequency heating coil (inductor) is built into a mold made of insulating material, and a conductive plate is attached to the hardened resin part of the mold to apply high-frequency power to the inductor. A thermosetting resin molding apparatus characterized in that a conductive plate generates heat to harden the resin.