JP2931044B2 - Rotary body manufacturing equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing apparatus for molding a rotary body such as an impeller mounted on a rotary drive device such as a motor using a mold.

[Related Art] A rotating body such as an impeller is mounted on a rotary drive device such as a motor. And it is rotated by the drive of a rotation drive device. At this time, if the balance of the rotating body is poor, vibration may occur at the time of driving, and this may cause noise such as vibration noise.

Conventionally, in order to prevent this, a rotating body such as a molded impeller is actually driven, and when the balance is poor, a resin or other weight is glued or poured into an appropriate portion of the rotating body. .

[Problems to be Solved by the Invention] However, in such a method, work is troublesome and improvement in productivity cannot be expected. Further, it is difficult to manufacture a rotating body having exactly the same balance.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems in the conventional example, and to improve the productivity without the need for labor and to easily manufacture a rotating body having exactly the same balance. To provide a manufacturing apparatus.

Means for Solving the Problems In order to achieve the above object, the present invention is an apparatus for manufacturing a rotating body that is mounted on a rotation drive device and rotated, and in which a liquid material is injected to form the rotating body. It is characterized by comprising a mold to be molded, and a plurality of balance adjusting members which are supported by being arranged in the circumferential direction of the mold and whose respective tips can be projected or retracted into the inner hollow portion of the mold.

[Operation] According to the rotating body manufacturing apparatus having the above configuration, the rotating body is molded by injecting and solidifying a liquid material into the hollow portion inside the mold. At this time, if the balance adjusting member is made to protrude, the liquid material is removed by the protruding portion, and the rotating body is molded. If the balance adjusting member is retracted, the portion is filled with the liquid material, and the rotating body is molded. Thus, a weight portion for balancing the rotating body is formed or not formed.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an external view of a core pin (a part of a mold) of an apparatus for manufacturing a rotating body according to one embodiment of the present invention. The core pin of this embodiment is for manufacturing an impeller described later in detail.

FIG. 2 is a cross-sectional view showing a state in which an impeller is manufactured using the core pins of FIG.

1 and 2, 1 is a core pin, 2 is a first step of the core pin 1, 3 is a second step of the core pin 1, 4 is a balance pin (balance adjusting member), and 5 is a hole for inserting a shaft. Is shown. The balance pin 4 is located below the core pin 1 (first
It can be attached by press-fitting or the like from the lower side of the paper of the drawing), and by adjusting the amount of press-fitting, it can be protruded to the position indicated by reference numeral 4 or retracted to the position indicated by reference numeral 4 '. . To fine-tune this amount of protrusion,
The tip of the balance pin 4 can be cut off. Instead of press fitting or the like, the balance pin 4 may be screwed. In such a configuration, the protrusion amount can be adjusted by rotating the balance pin 4. The balance pin 4 is, as is clear from FIG.
A plurality of balance pins 4 are provided for each of the core pins 1.
Are supported in a circumferential arrangement.

Referring to FIG. 2, when molding the impeller, the core block 21 is aligned with the fixed cavity 11, and the core pin 22 is further mounted. The core pin 22 is provided with a hollow portion for forming the blade portion 32 of the impeller 30 to be molded. The core pin 22 is provided with a cavity 25 for cooling water. The core pin 22 is fixed by a fixing screw 24.

Further, the core pin 1 shown in FIG. 1 is mounted. Core pin 1
All of the balance pins 4 are initially projected. 15, 16, and 17 indicate O-rings. Core pin 1 and core pin
A hollow portion for forming the cup portion 31 of the impeller 30 is provided between the impeller 30 and the impeller 30.

After mounting the core pin 1, the shaft 12 is inserted. The shaft 12 is pressed by a shaft pressing member 13, and the shaft pressing member 13 is fixed by a screw bolt 14. Then, the ejector pins 25 are inserted so that the receiving plate 23 can press the whole.

After arranging the members in this manner, the heated liquid resin is injected from the resin inlet 33. The liquid resin is filled in a hollow portion (a hollow portion inside the mold) formed by the cavity 11, the core pins 1 and 22, and the core block 21. Here, cooling water is introduced into the cooling water cavity 25,
Cool 22 and so on. By cooling, the injected resin is cured. After curing, the core pins 1 and 22 and the core block 21 are detached from the cavity 11, and the ejector pins 25 are pushed upward in FIG. 2 to take out the molded impeller 30.

FIG. 3A shows the impeller 30 molded as described above.
3 (b) is a side view, and FIG. 3 (c) is a back view. FIG. 3 (c) shows only the cup part 31 of the impeller 30, and the blade part 32 is omitted.

As can be seen from these figures, all of the balance pins 4 of the core pin 1 in FIG. 1 are formed by projecting, so that the impeller 30 has a concave portion 34 formed therein.

Impeller 30 in which all such recesses 34 are formed
Is checked using a well-known balance inspection device. If the balance is good, the manufacture of the impeller 30 may be continued as it is. If the balance is poor, it is checked which position of the concave portion 34 the weight should be attached to. Then, among the balance pins 4 in FIG. 1, the balance pin 4 corresponding to the position where the weight is to be attached is retracted as indicated by reference numeral 4 '. Using the core pin 1 in this state, the impeller 30 is molded in the same manner as described above.

FIG. 4 (a) is a front view of the impeller 30 thus formed, and FIG. 4 (b) is a side view. In both figures, only the cup part 31 of the impeller 30 is shown, and the blade part 32 is omitted.

As can be seen from these figures, a part of the balance pin 4 of the core pin 1 in FIG.

The impeller 30 in which such a convex portion 33 is partially formed
Is checked in the same manner using a balance inspection device. If the balance is good, the manufacture of the impeller 30 may be continued as it is. When the balance is not good, the position where the convex portion 35 is to be provided is checked again, and molding is performed as such. By repeating this process, a truly well-balanced impeller 30
Get. Thereafter, if molding is continued using the core pins 1 in the same state, a plurality of impellers 30 having the same balance can be manufactured.

The manufactured impeller 30 is assembled together with a motor 51, for example, as shown in FIG.

According to the impeller (rotating body) manufacturing apparatus of the above embodiment,
Since the balance pin 4 can be easily projected or retracted, it is very easy to manufacture a well-balanced impeller. Even when an impeller having various balances is manufactured while adjusting the balance pin 4 several times, the position of the balance pin 4 can be easily changed, so that the work is not required. Also, when the tip of the balance pin or the like becomes defective, it can be easily replaced. If the length of the balance pin 4 protruding is finely adjusted, the balance can be obtained more accurately.

In the above-described embodiment, the case where the resin impeller is manufactured has been described. However, the present invention can be applied to any other metal material as long as it is molded using a mold. The position and the number of the balance pins are not limited to those in the above embodiment, but may be variously changed.

[Effects of the Invention] As described above, according to the present invention, there is provided a balance adjusting member capable of injecting a liquid material and projecting or retracting into an inner hollow portion of a mold for molding a rotating body. By adjusting the position of this balance adjustment member, the weight can be easily attached to the molded rotating body, and a well-balanced rotating body with high productivity can be manufactured without labor. it can. It is also very easy to manufacture a rotating body with exactly the same balance.

[Brief description of the drawings]

FIG. 1 is an external view of a core pin (mold) of an apparatus for manufacturing a rotating body according to one embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating a state where an impeller is manufactured using the core pin of FIG. FIG. 3, FIG. 3 is a front view, side view, and back view of the molded impeller, FIG. 4 is a front view and side view of the molded impeller, and FIG. 5 is a fan assembled using the manufactured impeller. It is the front view and side view of an apparatus. 1 ... core pin, 4 ... balance pin (balance member), 11 ... cavity, 21 ... core block, 22 ...
Core pin, 30 ... Impeller, 31 ... Cup part, 32 ... Blade part, 33 ... Resin inlet, 34 ... Concave part, 35 ... Convex part, 50
…… Fan device.

Claims (1)

(57) [Claims] An apparatus for manufacturing a rotating body which is mounted on and rotated by a rotary driving device, comprising: a mold for injecting a liquid material to form the rotating body; and a mold arranged in the circumferential direction and supported by the mold. A plurality of balance adjusting members capable of projecting or retracting respective tips into an inner hollow portion of the mold, and a rotating body manufacturing apparatus, comprising: