JPH09174616A - Mold for thermosetting resin injection molding machine and molded motor using the mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce greatly runners produced at the time of molding, by improving the constitution of a mold for a thermosetting resin injection molding machine. SOLUTION: A molding machine comprises at least two injection nozzles 9, moving dies 2 having the same number of injection holes as cavities of a base die 4 on both sides of the die, and the base die 4 where a thermosetting resin is filled from the injection holes provided in the moving dies 2, separating from a base die 4. At the time of molding, the injection nozzles 9, the moving dies 2 and the base die 4 are connected and injection is made. The structure is such that allows the injection nozzles 9, the moving dies 2 and the base die 4 to be separated except when molding is carried out. Runner which is produced at the time of molding can be reduced greatly by using a mold of such structure for a thermosetting resin injection molding machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for a thermosetting resin injection molding machine used for manufacturing a mold motor used particularly for an air conditioner or a water heater.

[0002]

2. Description of the Related Art In recent years, as shown in FIG. 3, a motor has been widely adopted in which the entire stator is molded with a thermosetting resin, which takes advantage of vibration damping properties, arbitrary shape, and reliability.

A conventional mold for a thermosetting resin injection molding machine for molding a molded motor will be described with reference to FIG. FIG. 2 is a schematic view showing an injection nozzle portion of a thermosetting resin injection molding machine and a sectional view of a mold. The injection nozzle 11 injects the thermosetting resin after coming into contact with the mold 12, and fills the cavity 13 in which the product is molded through the runner portion 14. After being filled, the thermosetting resin is cured by the heat energy of the mold to become an insoluble and infusible resin, which forms the stator of the mold motor. Also,
In recent years, in order to improve the productivity at the time of molding, as shown in FIG.

[0004]

However, in the mold for the thermosetting resin injection molding machine which has been used conventionally, there is a runner portion which does not become a product, and it cannot be reused because of the thermosetting resin, resulting in material loss. The problem was how to treat the waste and waste.

The present invention solves the conventional problems, and an object thereof is to provide a mold for a runnerless thermosetting resin injection molding machine.

[0006]

In order to achieve this object, a mold for a thermosetting resin injection molding machine according to the present invention has at least two injection nozzles and a runner separate from the base mold on both sides of the mold. A movable mold having the same number of injection holes as the number of cavities of the base mold, and a base mold having a structure in which the thermosetting resin is directly filled through the injection holes provided in the movable mold. The injection nozzle, the movable mold and the base mold are connected to each other for injection during molding, and the structure is such that the injection nozzle, the movable mold and the base mold can be separated except during molding. It is a thing.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is such that the molding machine has at least two injection nozzles and the same number of cavities of the runner and the base mold separately from the base mold on both sides of the mold. And a base mold having a structure in which the thermosetting resin is directly filled through the injection hole provided in the movable mold, and the injection is performed at the time of molding. The nozzle, the movable mold, and the base mold are connected and injected, and the structure is such that the injection nozzle, the movable mold, and the base mold can be separated except when molding, and the runner part is injection molded. Since it does not come into contact with the base mold except when it is used, the temperature of the runner can be kept at a temperature at which the resin does not harden, so it can be used as the resin injected into the cavity during the next molding. To To.

According to the second aspect of the present invention, the mold motor is molded by the mold of the first aspect of the present invention, and it has an effect of realizing a mold motor that does not generate runners that cannot be reused.

An embodiment of the present invention will be described below with reference to the drawings. The present invention is not limited to this.

FIG. 1A is a schematic view of a nozzle portion of a thermosetting resin injection molding machine for molding a molded motor according to an embodiment of the present invention and a sectional view of a mold. The same number as the cylinder part 1 in which two injection nozzles 9 are arranged, the sprue 8 through which the thermosetting resin injected from the injection nozzle 9 passes, the runner part 10 and the cavities 5 arranged in the base mold 4. Movable mold 2 in which injection hole 6 of
And a base mold 4 in which a gate 5 through which a thermosetting resin injected from a cavity 5 and an injection hole 6 passes is disposed.

Further, FIG. 1 (b) shows a state at the time of molding,
The injection nozzle 9, the movable mold 2, and the base mold 4 are integrated, and the thermosetting resin injected from the injection nozzle 9 passes through the runner portion 3 and is filled in the cavity 5. Further, since the movable mold 2 is not in contact with the base mold except during molding, the temperature is always maintained at a temperature at which the curing of the thermosetting resin is not accelerated. No hardening occurs.

As a result of molding a molded motor with a mold for a thermosetting resin injection molding machine having the structure shown in FIGS. 1 (a) and 1 (b), a comparison with the conventional method shown in FIG. The amount of runners generated was greatly reduced, and the problems of material loss and waste disposal could be solved.

[0013]

EFFECT OF THE INVENTION By using the mold for thermosetting resin injection molding machine of the present invention, it is possible to solve the problems of material loss and waste disposal due to the runner portion which occur during molding.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view of a nozzle portion and a mold of a thermosetting resin injection molding machine showing an embodiment of the present invention. FIG. 1B is a thermosetting property during molding showing an embodiment of the present invention. Sectional view of resin injection molding machine nozzle and mold

FIG. 2 is a schematic view showing a structure of a conventional thermosetting resin injection molding machine die.

FIG. 3 is a sectional view showing a conventional molded motor.

[Explanation of symbols]

 1 Cylinder 2 Movable mold 3 Runner arranged in movable mold 4 Base mold 5 Cavity 6 Injection hole of movable mold 7 Gate of base mold 8 Sprue of movable mold 9 Injection nozzle

Claims (2)

[Claims] 1. A movable mold in which a molding machine is provided with at least two injection nozzles and runners and the same number of injection holes as the number of cavities of the base mold on both side surfaces of the mold, apart from the base mold. It is composed of a base mold which is a structure in which thermosetting resin is directly filled from an injection hole provided in the movable mold, and at the time of molding, the injection nozzle is connected to the movable mold and the base mold for injection. A mold for a thermosetting resin injection molding machine, characterized in that the injection nozzle, the movable mold and the base mold can be separated from each other except during molding. 2. A molded motor in which the outer periphery of the motor is molded by using the mold for thermosetting resin injection molding machine according to claim 1.