JP3117026B2 - Manufacturing method of resin mold motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molded motor, and more particularly to a molding means for preventing a stator winding from being damaged during resin molding.

[0002]

2. Description of the Related Art Conventionally, a stator winding is inserted into a stator core by an inserter, the shape of a coil end is adjusted by a coil shaping machine, bound by a bind yarn, and varnish is applied and solidified to maintain the state. As shown in the figure, the inner diameter of the stator core is used as a guide in the molding die and held on a support, and thermosetting resin mixed with filler is injected from the gate of the molding die and solidified. Has been adopted. in this case,
It is necessary to leave an appropriate gap between the side of the stator core and the coil end for binding by the bind thread, and when binding by the bind thread, no force is applied to press the coil end in the direction of the stator core. It is necessary to increase the thickness of the coil end in the thickness direction of the coil end in order to secure the insulation of the coil end including the variation in the shape of the coil end, which hinders the thinning of the product. Further, when the thermosetting resin mixed with the filler is injected from the side along the parting line of the mold as shown in FIG. 3, the resin directly hits the coil end as shown by the arrow, Problems such as deformation of the end, disconnection of the winding itself or dielectric breakdown are caused. Also, as shown in FIG. 4, when resin is injected by a pin gate from the fixed side of the molding die, if the position of the pin gate is not specified, it may be arranged on the winding of the coil end due to molding conditions. In some cases, disconnection or dielectric breakdown of the winding itself occurs due to the injection pressure of the resin.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has problems in deforming a coil end, disconnection or insulation breakdown of a winding itself when integrally molding a stator core on which a winding is applied. It is an object of the present invention to provide a molding means for a resin molded motor that does not cause the problem.

[0004]

In order to achieve the above object, the inner diameter of a wound stator core is determined by lowering a molding die.
Fits into the center of the column and is fixed in place by clamping.
Fix and mix the filler from the multiple pin gates on the upper mold.
Injected and solidified thermosetting resin to form stator
In the resin mold motor, a plurality of pin
The coil position is adjusted to the position of the stator core adjacent to the stator core.
To be opposed to the gap with the gate.
Then, it protrudes outward from the base of the lower die and extends in the axial direction.
Guide ribs, and the guide ribs
Insert the tooth space so that the stator core is positioned.
You.

[0005]

According to the above construction, the upper pin gate is arranged facing the gap between the coiled stator core and the adjacent shaped coil end, and resin is injected from the pin gate to cover the stator. By molding, deformation of the coil end due to the injection pressure of the resin and disconnection or dielectric breakdown of the winding itself can be suppressed. Also, the guide ribs
By inserting the tooth gap of the stator core, the stator core
Ensure that the pin position is aligned with the pin gate
Can be.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a side sectional view showing a detail of the present invention at the time of setting a mold. A pin 5 is formed at the center of the bottom surface of the lower die 2 so as to fit into the inner diameter of the stator core 4, support the stator core 4 at a predetermined position, and extend to the upper die 1. And a guide rib 6 protruding in the axial direction and extending in the axial direction. The guide rib 6 is arranged to face the position of one pin gate 3 of the upper die 1. A method of manufacturing the above configuration will be described. First, the guide rib 6 is provided with the above-mentioned slide so that the gap between the adjacent coil end 8 of the stator core 4 in which the winding 7 is wound on the guide rib 6 is adjusted .
By inserting the tooth grooves 4a of the data core 4 into the stator core 4,
After positioning , the stator core 4 is fitted into the lower die 2 along the column 5, and the upper die 1 is put thereon so as to match the column 5, and the pin gate 3 faces the gap between the adjacent coil end 8 of the stator core 4. To the position where you want to. In this state,
When the mold-clamping pressure is applied and the thermosetting resin mixed with the filler is injected from the pin gate 3, the thermosetting resin flows through the cavity without directly hitting the coil end 8 as shown by the arrow in the figure, and is filled. The stator can be formed without deformation of the coil end 8, disconnection of the winding itself or dielectric breakdown. FIG. 2 is a sectional side view of a main part showing the position of the pin gate 3 of the molded stator, and shows a state in which a plurality of pin gates 3 are provided inside the inner winding 7. Depending on the molding conditions, the pin gate 3 can be similarly provided between adjacent outer windings 7 or in a gap surrounded by the inner winding 7 and the outer winding 7.

[0007]

As described above, according to the present invention, the gap between adjacent coil ends of the stator winding is aligned with the guide ribs provided on the lower column, and the tooth grooves of the stator core are formed.
By inserting and positioning the stator core, and fitting the stator core along the columns, the position of the pin gate of the upper die and the position of the gap between the coil ends adjacent to the stator windings are aligned, so that the upper die is positioned. It is possible to prevent the thermosetting resin injected from the pin gate from directly hitting the coil end, and prevent deformation of the coil end due to injection pressure of the thermosetting resin, disconnection of the winding itself, or dielectric breakdown.

[Brief description of the drawings]

FIG. 1 is a side sectional view at the time of setting a mold showing details of the present invention.

FIG. 2 is a cross-sectional side view of a main part showing a position of a pin gate of a formed stator.

FIG. 3 is a side sectional view when a conventional molding die is set.

FIG. 4 is a cross-sectional side view of a main part showing the position of the pin gate when the position of the pin gate of the mold is not specified.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper die 2 Lower die 3 Pin gate 4 Stator core 5 Prop 6 Guide rib 7 Winding 8 Coil end

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-52-125703 (JP, A) JP-A-59-6752 (JP, A) Jpn. Field (Int.Cl. ⁷ , DB name) H02K 15/12 H02K 1/18 H02K 3/32 H02K 5/08

Claims (2)

(57) [Claims] 1. An inner diameter of a wound stator core is inserted into a supporting column erected at the center of a lower mold of a molding die, fixed at a predetermined position by mold clamping, and a filler material is provided from a plurality of pin gates provided on an upper mold. In a resin molded motor formed by injecting and solidifying a thermosetting resin mixed with a resin to form a stator, the positions of the plurality of pin gates of the upper die are set so as to face gaps between adjacent shaped coil ends of the stator core. A method for manufacturing a resin molded motor, wherein the resin molded motor is disposed. 2. The stator according to claim 1, wherein a guide rib protruding outward and extending in the axial direction is provided on the base of the lower mold, and a tooth groove of a stator core is inserted into the guide rib to position the stator core. Manufacturing method of resin mold motor.