KR950010604B1 - Article device and method for casting - Google Patents

Abstract

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Description

Casting product, its casting apparatus and casting method

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a broken side view of a rotary electric machine showing the first embodiment of the present invention.

2 is a perspective view of a divided outer mold.

3 is a perspective view of an inner mold.

4 is a perspective view of an intermediate mold.

5 is a perspective view of a divided intermediate mold.

6 is a perspective view of the intermediate mold attached to the inner mold.

7 is a longitudinal sectional view of a casting apparatus.

8 is a cross-sectional view of the disappearance model of a bearing bracket.

9 is a front view of a loss model of a bearing bracket.

10 is a longitudinal sectional view of a mold for casting a bearing bracket.

11 is a graph showing the pressure distribution acting on the disappearance model.

12 is a perspective view of a guard member showing a second embodiment of the present invention.

FIG. 13 is a longitudinal sectional view of a stator frame showing a third embodiment of the present invention. FIG.

14 is the equivalent of FIG.

15 is the equivalent of FIG.

16 is a perspective view of a continuous casting device showing a fourth embodiment of the present invention.

FIG. 17 is a longitudinal sectional view showing a fifth embodiment of the present invention and showing a state in which sand is chopped. FIG.

18 is a perspective view of the internal type for reinforcement.

19 is a view corresponding to FIG. 18 showing a sixth embodiment of the present invention.

20 is a view corresponding to FIG. 17 showing a seventh embodiment of the present invention.

21 is equivalent to 18.

22 is the equivalent of FIG.

FIG. 23 is a view corresponding to FIG. 21 showing an eighth embodiment of the present invention. FIG.

24 is a view corresponding to FIG. 17 showing a ninth embodiment of the present invention.

25 is a perspective view of the reinforcing member.

FIG. 26 is a diagram corresponding to FIG. 25 showing a tenth embodiment of the present invention. FIG.

27 is a diagram corresponding to FIG. 25 showing the eleventh embodiment of the present invention.

28 is a diagram corresponding to FIG. 25 showing a twelfth embodiment of the present invention.

FIG. 29 is a cross-sectional view of a burnout model showing a thirteenth embodiment of the present invention; FIG.

30 is a perspective view of the reinforcing member.

FIG. 31 is a view corresponding to FIG. 30 showing a fourteenth embodiment of the present invention. FIG.

32 is a view corresponding to FIG. 30 showing a fifteenth embodiment of the present invention.

33 is a view corresponding to FIG. 30 showing a sixteenth embodiment of the present invention.

34 is a view corresponding to FIG. 29 showing a seventeenth embodiment of the present invention.

35 is a cross-sectional view of the burnout model showing an eighteenth embodiment of the present invention.

36 is a longitudinal side view of the partial vanishing model.

37 is a front view of the partial disappearance model.

38 is a longitudinal cross-sectional view of the partial disappearance model.

Fig. 39 is a front view of the partial disappearance model.

40 is a longitudinal side view of the partial vanishing model.

41 is a front view of the partial disappearance model.

Figure 42 corresponds to Figure 35 showing the nineteenth embodiment of the present invention.

43 is a longitudinal sectional side view of a partial disappearance model showing a nineteenth embodiment of the present invention.

44 is a front view of the partial vanishing model.

45 is a longitudinal cross-sectional view of the partial disappearance model.

46 is a front view of the partial vanishing model.

Figure 47 is a longitudinal cross-sectional view of a partial vanishing model.

48 is a front view of the partial vanishing model.

Figure 49 corresponds to Figure 43 showing the twenty-first embodiment of the present invention.

50 degrees is equivalent to 45 degrees.

51 is equivalent to 47 degrees.

52 is a perspective view of an outer sand type showing a conventional configuration.

53 is a perspective view of the inner sand.

54 is a perspective view of a core sand.

55 is a perspective view of a mold for making an outer sand mold.

56 is a partial cross-sectional view of the sand mold combined.

57 is the equivalent of FIG.

58 is the equivalent of FIG.

The present invention relates to a cast product, a casting apparatus and a casting method for molding by injecting molten metal into the burnout model.

For example, the stator frame of the rotary electric machine is substantially cylindrical in shape, and the ventilation hole is provided in the axial center part of the wall part. Through this hole, the cooling wind which cooled the winding is discharged to the outside.

The stator frame is conventionally manufactured by casting. An example of a method for casting a stator frame will be described below with reference to FIGS. 52 to 56.

First, the outer sand mold 1 shown in FIG. 52, the inner sand mold 2 shown in FIG. 53, and the core sand mold 3 for holes shown in FIG. 54 are produced. In this case, the outer sand mold 1 accommodates and fixes a cylindrical inner mold 5 having an outer dimension approximately equal to the outer dimension of the stator frame in the mold 4 of the spherical container as shown in FIG. In the state, the sand between the two (4, 5) chopped and hardened. In addition, the inner sand mold 2 and the core sand mold 3 are made by smelting sand into a cavity of a two-division mold (not shown), respectively. Then, the core sand mold (3) is attached to the inner sand mold (2) by fitting the pinned portion (3a) protruding from the core sand mold (3) to the pinned portion (2a) formed at the outer peripheral portion of the inner sand mold (2). The shaping | molding which accommodates the thing in the outer side sand mold 1 is performed. Thereafter, as shown in FIG. 56, hot water of molten metal is poured into the cavity 6 formed by the sand molds 1, 2, and 3, and injection is performed. Thereby, the stator frame is cast. In the hole of the casted stator frame, for the sake of safety, a protective member made of a net lamp is fixed with a bolt.

However, in the above-described conventional configuration, only when fitting the concave portion 3a of the core sand mold 3 to the concave portion 2a of the inner sand mold 2 when attaching the sand mold 3 to the sand mold 2 There is a drawback that the core sand mold 3, i.e., the positioning accuracy of the hole, becomes poor. In order to solve this problem, it is conceivable to equip the outer sand mold with the outer sand and to fit the outer sand with the outer sand and to fit the core sand with the outer sand and the inner sand. However, in this configuration, since the outer sand mold has to be divided into two, there is a problem that the number of divisions of the sand mold increases.

In addition, the sand molds (1, 2, 3) are formed so that a relatively large gap is formed at the part where the mold and the mold are fitted, and the hot water flows into the gap, resulting in a very large casting bar and removing the bar. There was a drawback that the work was a big deal.

The method of casting using the burn-out model as a structure which solves this fault has conventionally been considered.

In this method, a burning mold of a stator frame is manufactured by using a mold using foam beads, and the sand mold is squeezed into the sand mold in a state in which the vanishing model is accommodated in a sand mold. To inject. As a result, the disappearance model is melted and lost by the hot water, and the casting is performed by filling the water into the cavity formed by the disappearance of the disappearance model. In this configuration, since the burnout model is manufactured by using a mold, it is possible to sufficiently increase the accuracy of the alignment of the holes of the stator frame, that is, the main adjustment density of the cast product. In addition, since the mold is molded, the gap between the mold and the part where the mold is brought into contact with each other decreases, resulting in a disappearance model and a smaller bar, and as a result, a smaller amount of paint applied to the cast product.

However, even when the stator frame is cast using the vanishing model, since the protection member is a separate body, the process of processing the protection member by bolts or the like in the hole of the stator frame after casting requires a lot of parts, resulting in annoying assembly. Was flawed.

An object of the present invention is to improve the casting accuracy of the cast, at the same time to reduce the number of bars and to further reduce the number of parts to improve the assembly workability, casting products, casting method and casting apparatus To provide.

The cast product of the present invention is a cast product that is formed by accommodating a burnt-out model in the sand form of the cast and simultaneously smelting sand and injecting a molten metal into the burnt-out model.

This part is non-realizing material, fixed to protrude part of the vanishing model, and is integrally injected into the casting when molten metal is injected.

As a result, the cast product of the present invention is molded by injecting molten metal into the burnout model so that the main adjustment density is increased and the bar is reduced. In addition, the parts are made to be integrally injected into the casting by fixing parts of non-real material to protrude into the burnout model, so that the number of parts is small and the work of attaching the parts to the casting can be unnecessary. Can be.

In this case, a constitution may be considered in which the cast product is a frame for an electric machine having a hole for ventilation, and at the same time a protection member for installing a part in the hole of the frame for an electric machine.

The protective member may be made of wire, net or louver. It can also be used as a reinforcing member to prevent the deformation of the lost model when sand is sanded into the sand form. In this case, the lost model will not be deformed when the sand is crushed. It can be reliably prevented.

In addition, the casting apparatus of the modified embodiment of the present invention is a device for casting a casting by accommodating the burnout model in the sand form and injecting the molten metal into the burnt down model by putting sand into the sand form, and is installed on one side of the sand formwork and in the sand form and sand formwork. It is provided with a vibrating device for providing a vibration to the sand and at the same time is provided with a sandwich between the vibrating device is provided with an auxiliary vibration device for providing vibration to the sand at any position in the sand form.

According to this structure, when sand is chopped into the sand form, the vibrator and the auxiliary vibrating device facing the vibrator provide the sand to the sand and the sand in the sand form. The packing density becomes uniform. For this reason, since the pressure difference of the sand which acts on the inside and the outside of the burnout model can be reduced, it is possible to prevent the burnout model from being deformed when the sand is chopped.

In the case of the above configuration, the auxiliary vibrator may be configured to be movable relative to the burnout model. In such a configuration, the auxiliary vibrator may be disposed at an optimal position, and the pressure difference between the sand acting on the inside and the outside of the burnout model may be reduced. It is possible to further reduce and more reliably prevent the vanishing model from deforming when the sand is chopped.

In another aspect of the present invention, there is provided a method of casting a frame for an electric machine, the process of receiving a burnt-out model for injection molding of a premise for an electric machine in a sand form and having a portion that is approximately equally in contact with the inner circumference of the burnt-out model. The process of inserting the internal reinforcing mold into the inner circumference of the vanishing model, the process of crushing the sand into the sand form with the internal reinforcing internal mold inserted into the inner circumference of the vanishing model, and the molten metal after the sand compacting is completed. And forming a frame for an electric machine by injecting the same, and forming a frame for the electric machine, and then opening a mold and taking out a reinforcing internal mold in the premator for the electric machine.

According to the above manufacturing method, the inner circumferential portion of the reinforcing mold is inserted into the inner circumferential portion of the vanishing model, and the contact portion of the reinforcing inner mold is brought into uniform contact with the inner circumferential portion of the small firing model. As a result, when sand compaction is carried out in the sand formwork, there is a difference in the amount of sand input from the inside and the outside of the vanishing model, and the inside and outside of the vanishing model may be imbalanced even if the pressure of the sand is imbalanced. This can be prevented from being deformed.

In the case of the above configuration, the frame for an electric appliance has a thin portion, and the internal reinforcing type has a portion that substantially equally contacts the portion corresponding to the thin portion of the vanishing model of the frame for the electric appliance. I can think of it. According to this, especially when the part corresponding to the thin part of the loss | disappearance model (henceforth thin part) is easy to deform | transform by the imbalance of the pressure of sand, the deformation | transformation can be prevented by an internal type | mold.

In another aspect of the present invention, there is provided a method of manufacturing a component for an electric machine, in which a wave-shaped band having a thin thickness is placed at a portion where strength is insufficient in an electric machine part in a burnout model for injection molding an electric machine part. The process of disposing the strength reinforcement piece, the process of accommodating the burnout model in the sand formwork, the process of crushing the sand into the sand formwork, and injecting the molten metal after the sand compaction is completed to melt the reinforcement member uniformly to make electrical equipment. It becomes a process of shape | molding the parts for metal.

According to this configuration, since the reinforcing member is formed in the shape of a thin thin wave band, the heat capacity of the reinforcing member is reduced and the reinforcing member melts uniformly when molten metal is injected. For this reason, the reinforcing member can be uniformly dispersed in the part with insufficient strength in the parts for electric equipment, and segregation can be prevented from occurring in the structure of the cast part.

In this case, a hole for extracting gas for removing gas generated when the reinforcing member is melted may be provided near the reinforcing member.

As a result, the gas is removed through the hole through which the gas is drawn, thereby preventing the formation of pinholes due to the gas in the cast part. Moreover, the manufacturing method of the components for electric machines of another modified aspect in this invention comprises the process of constructing by combining and combining the several burnt-off models of the burnt-out model for injecting and shape | molding an electrical device component, and the burnt-off model which assembled together. It comprises a process of accommodating in a sand formwork, a process of compacting sand in a sand formwork, and a process of shaping an electric machine part by injecting molten metal after completion of sand compaction.

According to the above configuration, since the vanishing model is formed by assembling a plurality of partial vanishing models, the shape of each partial vanishing model is simplified even if the shape of the component for an electric machine is complicated. Therefore, since the structure of the metal mold | die for shaping each part loss model can be simplified, the metal mold | die structure can be simplified as a whole.

In this case, when assembling a plurality of partial vanishing models, it is preferable to provide a positioning recess in one partial vanishing model and to provide a positioning recess in the other partial vanishing model. As a result, the partial disappearance model can be assembled without being staggered.

Hereinafter, the present invention will be described with reference to FIGS. 1 to 12 for a first embodiment adapted to a rotary electric machine.

First, a stator 12 is attached to an inner circumferential portion of the stator frame 11 that is substantially cylindrical as a whole in FIG. 1 showing the overall configuration of the rotary electric machine, and a winding 13 is wound around the operator 12. Ventilation holes 11a are formed in the middle part of the main wall of the stator frame 11 in the axial direction, and a protection member 14 is provided in the holes 11a. For example, it consists of a plurality of metal bars 15. In this case, each end of each of the plurality of metal bars 15 is embedded in the periphery of the hole 11a.

The bearing brackets 16 and 17 are fitted to both ends of the stator frame 11. These bearing brackets 16 and 17 are tightened and fixed to the stator frame 11 by bolts 18. A blower plate 19 is sandwiched and fixed between the bearing brackets 16 and 17 and both ends of the stator frame 11.

On the other hand, the rotating shaft 21 of the rotor 20 is rotatably supported by the bearings 22 and 23 provided at each center of the bearing brackets 16 and 17. Cooling fans 24 are integrally provided at both ends of the rotor 20. The end of the cooling fan 24 is positioned to face the tip of the vent plate 19 via a slight gap. The bearing brackets 16 and 17 are provided with intake ports 25 (only one side is shown), respectively.

In the above configuration, when the rotor 20 rotates, outside air is sucked from the intake port 25 of the bearing brackets 16 and 17 by the blowing action of the cooling fan 24. The sucked air is guided to the blower plate 19 to cool the winding 13 and then discharged to the outside through the hole 11a of the stator plane 11.

Next, the case where the stator frame 11 is cast will be described with reference to FIGS. 2 to 7. First, before the casting, a burnout model of the stator frame 11 is made. In this case, the outer mold for forming the burnout model is divided into one divided outer mold 26 (see FIG. 2) and the other divided outer mold (not shown). Consists of. The divided outer mold 26 is formed with a concave portion 26a having a shape obtained by dividing the stator frame 11 along the shaft center. With respect to such an outer mold, the inner mold 27 has a substantially circumferential shape as shown in FIG. 3, and an inner mold 28 (see FIG. 4) for attaching the intermediate mold 28 (see FIG. 4) for forming the hole 11a in the outer peripheral portion ( 27a) is formed. In addition, the indentations 27a are formed in the same number as the number of the holes 11a.

The intermediate mold 28 here consists of two divided intermediate molds 29 (see FIG. 5). A plurality of grooves 29b are formed in the mutually joining surface 29a of the divided intermediate mold 29.

The metal rod 15 of the protection member 14 mentioned above is accommodated in this groove 29b, and is fixed. (See Figure 4). The intermediate mold 28 to which the metal rod 15 is fixed is fitted into the concave portion 27a of the inner mold 27 to fix it as shown in FIG. The inner mold 27 having the intermediate mold 28 fixed therein is received and fixed in the concave portion 26a of the outer mold formed by combining the divided outer mold 26. Then, the missing model of the stator frame 11 is molded by injecting foam beads in the cavity formed by the outer mold and the inner mold 27. The metal rod 15 is caught in the ventilation hole in this burnout model. In this case, both ends of the metal rod 15 are embedded in the disappearance model, and a part thereof, ie, an intermediate portion except the both ends, protrudes from the disappearance model.

After that, the burnout model is taken out of the mold, and a mold chart (hereinafter referred to as a figure) is performed to make sand easily fall on the outer surface of the shaped burnt model. As this figure, for example, a layer mainly composed of mineral particles such as SiO ₂ , Al ₂ O ₃ , MgO and the like is formed on the surface of the disappearance model. An operation of casting the stator frame 11 using such a burnout model will be described with reference to FIG.

In FIG. 7, the sand mold 41 is accommodated in the sand form which is a casting mold, and sand sand which fills the sand 43 in the sand form 42 is performed. Specifically, first, a predetermined amount of sand 43 made of silica sand is filled in the sand form 42, and the surface is flattened. Then, the burner model 41 having the spout 44 and the spout 45 attached thereto is placed thereon. Put). The sand 43 is further filled to fill the disappearance model 41.

Here, the vibrator 46 is operatively connected and arrange | positioned at the outer bottom part which is one side of the sand form 42, for example. The vibrator 42 is configured to impart vibrations to the sand form 42 and the sand 43 in the sand form 42. In addition, the auxiliary vibrator 47 is provided so as to face the vibrator 46 with the sand mold in between. Specifically, the elevating device 48 is provided so as to be movable in the vertical direction, and the substrate 49 is disposed in the elevating device 48 so as to be movable in the horizontal direction. The vibration device 47 is mounted. As a result, the tip vibration part 47a of the auxiliary vibration device 47 is configured to be movable in the vertical direction and the horizontal direction with respect to the vanishing model 41, and vibrates against the sand 43 at any position in the sand formwork. It is configured to be able to.

The buried model 41 is embedded in the sand 43, and then the elevating mechanism 48 and the substrate 49 are driven so that the front end vibration portion 47a of the auxiliary vibrator 47 has the cylindrical vanishing model 41. It should be placed in the center of the inner diameter. Subsequently, the vibrator 46 and the auxiliary vibrator 47 are operated to vibrate the sand form 42 and the sand 43. As a result, the packing density of the sand 43 becomes uniform, and the disappearance model 41 is sufficiently fixed. In this case, the optimum value is set according to the vanishing model 41, that is, the shape of the product during each vibration force, each vibration start time, and each vibration end time of the vibration device 46 and the auxiliary vibration device 47.

When the sand compaction is completed, the fixing of the disappearance model 41 is completed, and at the same time, the middle part of the metal rod 15 is filled in the sand 43 and fixed. In this state, it is injected. Specifically, when the molten metal is poured from the quest 44, the hot water reaches the burnout model 41 through the tap 45. The disappearance model 41 melt | dissolves, gasifies, and disappears by this reached high temperature hot water. The hot water is filled in the cavity, which is a space after it is lost, and the hot water is then cooled and cured through a cooling process to produce a casting. In addition, since the metal rod 15 is partially buried in the sand and fixed at the time of injection, it is hardly pushed by the flow of the bath. Moreover, the metal rod 15 is comprised from the other kind of metal which does not melt at the temperature of a bath. In addition, the gas generated at the time of casting is removed by the gas discharge apparatus which is not shown in figure.

Next, the case in which the above-described bearing brackets 16 and 17 are cast by the burnout model casting method will be described with reference to FIGS. 8 to 10.

Since the bearing brackets 16 and 17 have substantially the same shape, one bearing bracket 16 will be described in this case.

First, the disappearance model of the bearing bracket 16 is molded by a mold (not shown) prior to casting. Molding of the missing model is performed in substantially the same manner as in the case of molding the missing model of the stator frame 11 described above. 8 and 9 show the disappearance model 50 of the bearing bracket 16. A housing forming portion 51 for forming a cylindrical housing portion into which the bearing 22 is fitted is supported at the center portion of the vanishing model 50 to protrude toward the middle of FIG. 8. A reinforcing member 52 is embedded in the housing forming portion 51. The reinforcing member 52 is made of a thin band-like member in a wave shape and cylindrical shape (see FIG. 9), for example, in stone (Sn). In this case, the housing portion is a portion where the strength of the bearing bracket 16 is insufficient and is located at the strength lacking portion in the vanishing model 50, that is, the housing reinforcement member 52 is disposed in the housing forming portion 51.

After the surface of the vanishing model 50 is shaped, the vanishing model 50 is installed in a sand mold (not shown), and the sand mold is placed in a sand mold as shown in FIG. 50) is purchased to form a mold (53). In this case, a gas extraction hole 54 is provided in the vicinity of the reinforcing member 52 in the mold 53, that is, in the central portion of the radial direction of the housing forming portion 51.

When the molten metal is injected into the molten metal 55 of the mold 53, the molten fluid reaches the vanishing model 50 through the molten metal 56. The disappearance model 50 melts and gasifies by the reached hot water bath. The hot water is filled in the cavity, which is the space after it is lost, and then the hot water is cooled and cured through a cooling process, and the bearing bracket 16 is cast. In this case, the reinforcing member 52 in the vanishing model 50 has a thin band-like member in the shape of a wave shape and has a cylindrical shape. Therefore, the heat capacity is so small that it melts quickly by the heat of the injected molten metal. As a result, the reinforcing member 52 is uniformly melted and dispersed in the housing portion of the bearing bracket 16 so that the material of the housing portion obtains a predetermined mechanical strength characteristic. Specifically, the use of stone (Sn) as a reinforcing member for cast iron results in a structure with a large amount of ferrite and partial reinforcement of the cast product.

Further, since the steam generated when the reinforcing member 52 melts during injection is discharged to the outside through the gas extraction hole 54, pinholes can be reliably prevented from being generated by the steam.

According to this embodiment of such a configuration, since the stator frame 11 is molded by injecting molten metal into the vanishing model 41, the molds 26, 27, and 28 may be used to make the vanishing model 41. As a result, the positioning accuracy of the hole 11a in the stator frame 11 can be increased, and the burr can be made small. In addition, since the protection member 14 made of the non-silent material is integrally injected into the portion corresponding to the hole 11a of the disappearance model 41, the number of parts can be reduced and the number of assembly labor can be reduced.

By the way, in the conventional structure, since the plastic perforated plate was used as a protection member attached to the hole part of a stator frame, there existed a fault that the strength of a protection member is weak. On the other hand, in the above embodiment, since the plurality of metal bars 15 are used as the protection member 14, the strength of the protection member 14 is increased. In addition, since both ends of the plurality of metal rods 15 are embedded in the stator frame 11, the strength of the stator frame 11 is increased, and the dropping or breaking of the protection member generated during the transportation of the conventional rotating electric machine and the rotating electric machine are performed. There is no damage after the installation of the machine. In addition, in the above embodiment, since the metal rod 15 is only disposed in the hole 11a, the air resistance of the air passing through the hole 11a is smaller than the air resistance of the conventional structure in which the porous plate made of plastic is disposed. Lose. For this reason, the exhaust efficiency of cooling air improves, and also the cooling performance of the stator 12 becomes high.

Further, in the above embodiment, since the figure is performed on the surface of the burnout model, there is a layer applied between the casted stator frame 11 and the sand, and the sand is easily shaken off from the stator frame 11, and in the later step Processing such as shot blasting can be performed easily.

According to the above embodiment, the auxiliary vibration device 47 is installed at the opposite position in addition to the vibration device 46, so that the sand at any position in the sand form 42 is provided by the auxiliary vibration device 47. Vibration can be applied to 43, whereby the packing density of the sand 43 in the entire circumference of the disappearance model 41 can be made uniform. In particular, the filling density difference of the sand 43 in the sand form 42 can be minimized, and the pressure difference between the outer circumferential surface Sout and the inner circumferential surface Sin of the cylindrical vanishing model 41 is effectively reduced. .

As a result, the deformation of the vanishing model 41 is reduced and a high quality cast product, that is, the stator frame 11 can be manufactured.

The sand acting on the outer circumferential surface (Sout) and the inner circumferential surface (Sin) of the disappearance model 41 in order to confirm the effect that the pressure difference between the outer circumferential surface (Sout) and the inner circumferential surface (Sin) of the disappearance model 41 is reduced. The pressure distribution of (43) was measured. This measurement result is shown in FIG. In FIG. 11 the vertical axis is pressure and the horizontal axis is distance from vibrator 46. In this case, as shown in FIG. 7, a plurality of pressure sensors 57 are disposed on the outer circumferential surface Sout and the inner circumferential surface Sin of the disappearance model 41 at predetermined intervals along the height direction thereof.

In the graph of FIG. 11, (circle) is a measurement pressure value in outer peripheral surface (Sout), and (circle) is a measurement pressure value in inner peripheral surface (Sin). When the auxiliary vibration device 47 is not provided, that is, the pressure distribution of the sand 43 acting on the outer circumferential surface Sout and the inner circumferential surface Sin of the vanishing model 41 is measured. Shown in the figure. As apparent from the graphs of Figs. 11 and 57, the graph of Fig. 11 shows a tendency that the pressure decreases as it moves away from the vibrator 46, but the pressure drop is smaller than the graph of Fig. 57. In FIG. 11, it can be seen that there is almost no pressure difference between the outer circumferential surface Sout and the inner circumferential surface Sin of the disappearance model 41. In the case of the above embodiment, the auxiliary vibration device 47 is connected to another vibration source not shown, but may be integrally fixed to the side wall of the sand form 42 so as to face the vibration device 46.

According to the above embodiment, the band-shaped thickness in which the reinforcing member 52 embedded in the housing forming portion 51 of the burnout model 50 is formed in the shape of a wave when the burnout model 50 of the bearing bracket 16 is made. Since the thin member has a thin configuration, the reinforcing member 52 becomes very small in heat capacity and quickly melts due to the heat of the molten metal injected.

As a result, the reinforcing member 52 is uniformly melted and dispersed in the housing part of the bearing bracket 16, thereby preventing segregation of the reinforcing member. For this reason, the material of the housing part of the said bearing bracket 16 can ensure predetermined mechanical strength characteristics. However, in the conventional configuration, as shown in FIG. 58, since the reinforcing member 8 is coiled and the thickness of the wire portion is considerably thick, its heat capacity is large, and the reinforcing member 8 remains unmelted by the heat of the molten metal bath in which the reinforcing member 8 is injected. There was a thing. In this case, a component of the reinforcing member 8 melts into the housing portion of the bearing bracket and cannot be dispersed, resulting in segregation in the casting structure. On the other hand, according to the said embodiment, such a fault can be eliminated.

As the molten casting metal, gray cast iron products, spherical graphite cast iron products, stainless steel cast steel products, and aluminum are used.

Figure 12 shows a second embodiment of the present invention and will be described different from the first embodiment. In FIG. 12, since the protection member 32 replaces the protection member 14, the plurality of metal rods 30 are connected to each other by the connecting metal rods 31 and are formed in a substantially network shape. In this second embodiment, the same effects as in the first embodiment can be obtained.

In addition, in the first and second embodiments, the metal rods 15, 30, and 31 are used as protection members, but the present invention is not limited thereto. Nails, steel pipes, wire rods (piano wires), meshes, porous plates, many You may use the plate etc. in which the slits were formed. As the shape of the metal rods 15, 30 and 31, it is also possible to use annular, triangular or rectangular ones, or flanges at both ends in the form of rods (with nails attached to both ends). The protective member may be made of a metal which does not melt in hot molten metal (for example, mechanical steel carbon steel, nickel alloy, etc.), but may be made of ceramic. In other words, it may be a burner member that does not melt in a hot water bath.

13 to 15 show a third embodiment of the present invention, and different parts from the first embodiment will be described.

In FIG. 13, for example, four ventilation holes 62 are formed in the main wall of the stator frame 61 instead of the stator frame 11. Two holes 62 are disposed on the left and right of the upper part, and two holes 62 are disposed on the left and right of the lower part. These holes 62 are provided with a louver 63 made of a missing member as a protective member. Each louver 63 is comprised by arrange | positioning three elongate louver metal plates 64 in parallel at predetermined intervals. In this case, the louver metal plate 64 is inclined as shown in FIG. 13, and when the rotary electric machine is arranged outdoors, rainwater comes into contact with the louver 63 when it rains from the top. As a result, rainwater does not enter the stator frame 61 through the hole 62.

The stator frame 61 is roughly carried out in the same manner as the first embodiment and cast using the burnout model. 14 shows an intermediate mold 65 for molding the hole 62 portion of the burnout model. This intermediate mold 65 is composed of a two-division mold, that is, a division intermediate mold 66. A groove 66b for fitting the louver metal plate 64 of the louver 63 is formed in the joining surface 66a of the divided intermediate mold 66. As shown in FIG. The louver metal plate 64 is inserted into the groove 66b of the divided intermediate mold 66, and the two divided intermediate molds 66 are combined to form an intermediate mold 65. The mold thus constructed is shown in FIG. In this case, both ends of the louver metal pin 64 protrude longer at night than both end faces of the intermediate mold 65.

The intermediate mold 65 is used in the same manner as in the first embodiment to form a burnout model. The louver metal plate 64 is fixed by embedding both ends of the louver metal hole, and an intermediate portion of the louver metal plate 64 protrudes from the burnout model. The stator frame 61 into which the louver 63 is integrally injected is cast by injecting molten metal in substantially the same manner as in the first embodiment by using such a burnout model.

In this third embodiment, the same effect as that of the first embodiment can be obtained, but since the protection member is constituted by the louver 63, the degree of freedom of the installation position of the hole 62 in the stator frame 61 is increased.

As shown in FIG. 14, even if the hole 62 is placed on the upper part of the stator frame 61, the rainwater enters the louver 63 when the rain falls when the rotary electric machine is installed outdoors. This can be prevented by. In addition, when a net or the like is provided as a protective member, rainwater cannot be prevented, so a hole cannot be disposed in the upper portion. Therefore, according to the third embodiment, since the hole 62, that is, the exhaust port, can be provided at the optimum position, the cooling efficiency can be improved, and heat is efficiently discharged to the outside by the cooling wind sucked into the inlet of the bearing bracket. can do. As a result, the central temperature of the stator and the stator frame 61 can be reduced, so that the temperature of the entire rotary electric machine can be made uniform, and the quality can be improved.

16 shows a fourth embodiment of the present invention, and a part different from the first embodiment will be described.

16 shows a continuous casting apparatus. The casting device of the first embodiment is used as a constituent device of this continuous casting device. The continuous casting device is arranged in the sand form 42, the filling of the sand 43, the arrangement of the loss model 41, the embedding of the loss model 41, the uniformity of the filling density of the sand 43 by vibration, Each process, such as pouring (pouring), is performed continuously in every area | region 1-5. When described in detail below, the prepared plurality of sand form 42 is placed on the hydraulic drive type conveying device 71 and is configured to be moved to the intermittent process intermittently.

First, in the region 1, the sand form 42 is filled with a predetermined amount of sand 43 from the filling supply device 27. The sand form 42 filled with the predetermined amount of sand 43 is moved to the zone 2 by the conveying device 71. In this zone (2), the surface of the sand (43) is sufficiently flattened, and the burnout model (41) attached with the spout 44 and the trough 45 is placed on the flat surface. The sand form 42 is then moved to the zone 3. In this zone 31 the sand 43 is charged from the filling feeder 72 into the sand form 42 until the filling height of the sand 43 reaches the top of the spout 44.

The sand form 42 is then moved to the zone 4. In this zone 4, the elevator 48 and the substrate 49 are driven to bury the auxiliary vibrator 47 in a predetermined position.

The optimal buried position in this case depends on the shape of the burnout model 41, but in the case of the cylindrical burnout model 41 as in the present embodiment, the vibrating portion of the auxiliary vibration device 47 is cylindrical burnt model 41 It is preferable to arrange at the center of the shaft.

In this state, the vibrator 46 and the auxiliary vibrator 47 disposed on the outer bottom of the sand form 42 are driven for a predetermined time. As a result, vibration is applied to the entire sand 43 from the bottom of the sand form 42 by the vibrator 46, and at the same time, the vibration 43 is vibrated by the auxiliary vibration device 47 on the sand 43 inside the burner model 41. This is applied. As a result, the packing density of the sand 43 in contact with the entire surface of the disappearance model 41 becomes uniform, the pressure difference between the inside and the outside of the disappearance model 41 is reduced, and is fixed at the set position of the disappearance model 41. After vibrating for a predetermined time as described above, the auxiliary vibrator 47 is gradually moved upward in the vibrated state, and is pulled out on the sand 43.

And sand form 42 is moved to zone 5.

In this zone 5 the molten metal bath 74 contained in the ladle 73 is injected from the spout 44. The injected hot water 74 reaches the disappearance model 41 through the runway 45, and replaces it with the disappearance model 41 by gasifying the disappearance model 41 to perform casting.

The gas and dust generated during this casting are discharged to the outside by the gas exhaust device 75 connected to the exhaust blower (not shown). In this way, continuous casting is performed by sending the sand form 42 intermittently in each zone. In this fourth embodiment, the same effects as those of the first embodiment can be obtained.

17 and 18 show a fifth embodiment of the present invention and a different part from the first embodiment will be described.

In FIG. 17, the sand 43 dried in the injection sand form 42 is put to a suitable depth in advance. In this state, the vanishing model 81 for injection molding the stator frame is installed in the sand 43 previously placed in the sand form 42.

In this case, the shaft center of the substantially small burnout model 81 is provided along the vertical direction. Then, a reinforcing inner mold 82 (see FIG. 18) is inserted into the inner circumference of the chamber model 81. The inner reinforcing mold 82 is composed of a base portion 83 and an insertion portion 84 protruding from the upper center portion of the 17th portion of the base portion 83. When the insertion portion 84 of the reinforcing inner mold 82 is inserted into the inner circumference portion of the disappearance model 81, the outer circumference portion of the insertion portion 84 is brought into uniform contact with the inner circumference portion of the disappearance model 81. .

Moreover, the figure (not shown) is performed in the surface part of the reinforcement internal mold 82 so that mold release may be performed after injection | pouring. The internal mold 82 for reinforcement is made of, for example, a ceramic, which is a heat-resistant material having a melting point higher than the temperature of the molten metal so as not to melt when the molten metal is poured. As described above, the sand mold 42 is disposed between the vanishing model 81 and the reinforcing inner mold 82 in a state in which the abutting portion 84 of the inner mold for reinforcing portion 82 is fitted to the inner circumference of the vanishing mold 81. After storage in the sand, the sand is chopped into the sand form 42. After the sanding is completed, the molten metal is poured into the burnout model 81 and injected. After the hardening of the molten metal is completed, the mold is opened, the sand 43 is shaken off, and the reinforcing inner mold 82 is taken out of the formed stator frame.

Therefore, also in this fifth embodiment, the same operational effects as in the first embodiment can be obtained. In particular, in the fifth embodiment, the reinforcing inner mold 82 is inserted into the inner circumference of the vanishing model 81 when sand is chopped into the sand form 42, so that the insertion portion 84 of the inner mold for reinforcement 82 is inserted. Is configured to contact the inner circumferential portion of the burnout model 81 approximately evenly, so that a difference may occur in the amount of sand 43 injected from the outside and the inside of the burnout model 81 due to the unbalance of the pressure of the sand 43. The deformation of the vanishing model 81 can be reliably prevented by the internal mold 82 for reinforcement. Therefore, since the inner diameter of the vanishing model 81 does not change, the inner diameter of the stator frame does not change, and the yield of injection molding can be improved. In addition, since the inner diameter of the disappearance model 81 does not change, the thickness of the wall part of the injection molded stator frame may be uniform and the strength and rigidity may be increased. Moreover, when the reinforcement internal mold 82 is taken out from the stator frame after hardening, since a figure is performed in the reinforcement internal mold 82, it can take out easily.

19 shows a sixth embodiment of the present invention and will be described differently from the fifth embodiment.

In FIG. 19, the reinforcing inner mold 85 instead of the reinforcing inner mold 82 is composed of a base 86 and an insertion portion 87 protruding from the base 86. The outer peripheral portion of the insertion portion 87 is formed along the axial direction of the plurality of holes 87a. In this sixth embodiment, the same functional lessons as in the fifth embodiment can be obtained.

20 to 22 show a seventh embodiment of the present invention and will be described different from the fifth embodiment.

In Fig. 20, the vanishing model 88, which replaces the vanishing model 81, has a thick wall portion in the axial middle portion and a thin wall portion in both ends 88a and 88b. That is, both ends 88a and 88b are thin parts.

In order to reinforce the loss | disappearance model 88 of such a shape, the 1st and 2nd reinforcement internal molds 89 and 90 were inserted in each inner peripheral part of the both ends 88a and 88b of the disappearance model 88. As shown in FIG.

As shown in FIG. 21, the first reinforcing inner die 89 is composed of a base 91 and an insertion portion 92 protruding from the base 91. When this insertion part 92 is fitted in the edge part 88a of the loss | disappearance model 88, the outer periphery of the insertion part 92 will make substantially equal contact with the inner peripheral part of the edge part 88a.

Also, as shown in FIG. 22, the second reinforcing inner die 90 is formed of a cylindrical member, and when the outer circumferential portion 90a is fitted into the end portion 88b of the burnout model 88, the outer circumferential portion 90a ends. The inner circumferential portion of the 88b is to be brought into substantially uniform contact. These first and second reinforcing inner molds 89 and 90 are made of, for example, ceramics, which are heat-resistant materials having a higher melting point than the molten metal temperature.

On the surfaces of the first and second reinforcing inner molds 89 and 90, figures are made to facilitate removal from the hardened stator frame when the mold is opened after the injection is performed. Therefore, in this seventh embodiment, the same effects as those of the fifth embodiment can be obtained.

In the seventh embodiment, the first and second reinforcing inner molds 89 and 90 are inserted into the stator frame after the injection is performed, but the present invention is not limited thereto. For example, a cylindrical reinforcing mold may be used to remove the reinforcing mold from the vanishing model 88 immediately after the sanding is completed and before injection is performed. In this case, when removing the reinforcement frame, the sand mold 11 is vibrated.

FIG. 23 shows an eighth embodiment of the present invention and will be described differently from the seventh embodiment. In FIG. 23, the reinforcing inner mold 93 instead of the reinforcing inner mold 89 is composed of a base portion 94 and an insertion portion 95 protruding from the base portion 94. As shown in FIG. In the outer peripheral portion of the insertion portion 95, a plurality of grooves 95a are formed along the axial direction. When the inserting portion 95 is fitted into the end portion 88a of the burnout model 88, portions other than the grooves 95a in the inserting portion 95 are brought into uniform contact with the inner circumference of the end portion 88a. Therefore, in this eighth embodiment, the same effects as in the seventh embodiment can be obtained.

24 and 25 show a ninth embodiment of the present invention, and different parts from the fifth embodiment will be described.

In Fig. 24, the cylindrical reinforcing member 69 (see Fig. 25) replaces the internal reinforcing mold 82 and the outer circumferential portion 96a which is a part which is approximately equally in contact with the inner circumference of the burnout model 81. The fluorine resin, for example, which is a low friction material, is coated in advance. In addition, for example, wax, which is a low friction material, is uniformly applied to the inner circumferential portion of the burnout model 81 in advance. The outer circumferential portion 96a of the reinforcing member 96 is in contact with the inner circumferential portion of the disappearing model 81 in a state where the reinforcing member 96 is inserted into the vanishing model 81, and the reinforcing member 96 disappears. It is comprised so that the inner peripheral part of the model 81 can be removed slidably, ie, smoothly, without resistance.

In the state where the reinforcing member 96 is inserted into the vanishing model 81, a predetermined amount of sand 43 is introduced into the sand form 42, the sand is chopped and the sand form 42 is completed. The reinforcing member 96 is gradually removed from the inside of the burnout model 81 with a small vibration. In this case, the sand 43 gradually fills the space created by removing the reinforcing support 96.

Then run the injection. That is, the molten metal is injected into the burnout model 81 through the molten metal provided in the sand 43. The hot water is injected into the cavity which is the space after the disappearance model 81 melts and disappears and is lost by the injected hot water, and then the water is cooled and hardened. Also in this ninth embodiment, the effect similar to that of the fifth embodiment can be obtained.

26 to 28 show the tenth to twelfth embodiments of the present invention, respectively, and a part different from the embodiment of FIG. 9 will be described. First, in FIG. 26 showing the tenth embodiment, the reinforcing member 97, which replaces the reinforcing member 96, arranges the plurality of round bars 98 in a substantially cylindrical shape while simultaneously placing the plurality of round bars 98 in their inner portions. Is configured by connecting with a plurality of rings (99). When the reinforcing member 97 is inserted into the inner circumferential portion of the disappearance model 81, the outer circumference of the round bar 98 is brought into uniform contact with the inner circumference of the disappearance model 81.

In this case, the round bar 98 constitutes the insertion portion.

Further, in FIG. 27 showing the eleventh embodiment, the reinforcing member 100 replacing the reinforcing member 96 has a cylindrical shape as a whole, and a plurality of protrusions 101 are formed by forming the circumferential wall portion in a convex shape. We are equipped with protrusion. The outer circumferential portion of the protruding portion 101 is brought into substantially uniform contact with the inner circumferential portion of the burnout model 81. In this case, the protruding portion 101 constitutes the insertion portion.

In FIG. 28 showing the twelfth embodiment, the reinforcing member 102, which replaces the reinforcing member 96, is formed to be bent so as to wind the long round member 103 in a spiral shape, so that the whole is substantially cylindrical. The outer circumferential portion of the round bar member 103 is to be brought into substantially uniform contact with the inner circumferential portion of the disappearance model 81. That is, the round bar 103 constitutes an insertion part. In this twelfth embodiment, when the reinforcing member 102 is removed from the vanishing model 81, the reinforcing member 102 is pulled out while being rotated in the direction opposite to the winding direction of the round bar 103. Can be removed smoothly.

Therefore, in these tenth to twelfth embodiments, the same effects as in the ninth embodiment can be obtained.

29 and 30 show a tenth embodiment of the present invention, and different parts from the ninth embodiment will be described.

In FIG. 29 and FIG. 30, the burnout model 104 which replaces the burnout model 81 has the wall part 105 in which the cylindrical reinforcement member 106 is embedded in the wall part 105. As shown in FIG.

This reinforcing member 106 can reliably prevent the vanishing model 104 from deforming when sand is chopped.

Therefore, in this thirteenth embodiment, the same effects as in the ninth embodiment can be obtained. In the thirteenth embodiment, the reinforcing member 106 is embedded in the injection-molded stator frame.

31 to 33 show the fourteenth to sixteenth embodiments of the present invention, respectively, and a part different from the thirteenth embodiment will be described. In FIG. 31 showing the fourteenth embodiment, the reinforcing member 107, which replaces the reinforcing member 106, arranges a plurality of round rods 108 in a cylindrical shape, and adds the plurality of round bars 108 from their outside. It is comprised by the two connection rings 109, and is comprised.

In FIG. 32 showing the fifteenth embodiment, the reinforcing member 110, which replaces the reinforcing member 106, is formed in a substantially cylindrical shape, and four protrusions 110a are formed on the circumferential wall thereof in the axial direction. It is constructed by projecting.

In FIG. 33 showing the sixteenth embodiment, the reinforcing member 111, which replaces the reinforcing member 106, is formed to be bent to spirally wound the long round sewing agent 112 so as to form a substantially cylindrical shape as a whole. . Therefore, also in these 14th-16th Example, the effect similar to a 13th Example can be acquired.

FIG. 34 shows a seventeenth embodiment of the present invention and will be described differently from the thirteenth embodiment.

In Fig. 34, the vanishing model 113, which replaces the vanishing model 104, has a thick wall portion in the axial middle portion and a thin wall portion of both ends 113a and 113b. Cylindrical reinforcing members 114 and 115 are embedded in the wall portions of these end portions 113a and 113b, respectively. Therefore, also in this seventeenth embodiment, the effect similar to that of the thirteenth embodiment can be obtained.

35 to 41 show an eighteenth embodiment of the present invention, and different parts from the first embodiment will be described.

In the eighteenth embodiment, a flanged bearing bracket is cast in place of the bearing brackets 16 and 17. 35 shows a vanishing model 121 for injection molding the flange bearing bracket. As is apparent from FIG. 35, the flanged bearing bracket has a considerably more complicated shape than the bearing brackets 16 and 17. In addition, this flanged bearing bracket is a bearing bracket used for a fully closed outer rotary electric machine, for example.

In Fig. 35, the vanishing model 121 is configured by combining a plurality of, for example, three partial vanishing models 122, 123, and 124 in combination. Here, the partial disappearance model 122 has a cylindrical housing forming portion 112a and the housing forming portion 122a corresponding to a housing portion for supporting a bearing (not shown) as shown in FIGS. 36 and 37. The flange portion 122b is provided with a protrusion provided on the outer circumference thereof. This flange portion 122b is a coupling portion for coupling.

In addition, the partial disappearance model 123 is provided in the outer peripheral portion of the flange portion 123b having an insertion portion 123a corresponding to an insertion portion that fits into an end hole of a stator frame, not shown, as shown in FIGS. 38 and 39. FIG. It consists of the fixture 123c which protruded toward the exterior. In addition, a bolt (not shown) is inserted into a through hole formed in the fastener of the bearing bracket corresponding to the fastener 123c, and the fastener fastens the bearing bracket to the stator frame by the bolt.

Then, the partial vanishing model 122 and the partial vanishing model 123 are combined and combined by fitting the flange 122b of the partial vanishing model 122 to the inner circumference of the flange member 123b of the partial vanishing model 123. (See Figure 35).

On the other hand, the partial disappearance model 124 is composed of a disk-like member 124a for forming a flange portion of the bearing bracket as shown in FIGS. 40 and 41.

In FIG. 40 of the disc-shaped member 124a, an insertion recess 124b is formed at the center of the left side for combination. The partial loss model 122 and the partial disappearance model 124 are combined and bonded by fitting and bonding the recess 122c provided on the right side during the first middle part of the partial loss model 122 in the insertion recess 124b. (See also chapter 35). As a result, the three partial disappearance models 122, 123, and 124 are combined to form the disappearance model 121.

However, by attaching and attaching each vane model (not shown) of the spouts, the tap water and the hot water part to the vanishing model 121 formed by combining and attaching the coating of the figure having fire resistance on the surface of the vanishing model 121. (Not shown) is performed. After the burnout model is accommodated in a sand formwork (not shown), the sand form is sanded into the sand form by vibrating the sand formwork. Upon completion of sand compaction, the molten metal is injected from the molten metal of the burnout model 121. When the injected hot water reaches the disappearance model 121 through the water flow, the disappearance model 121 is melted, lost, and filled in the cavity that is the space after the disappearance. The bath is then cooled and cured to form a flanged bearing bracket.

According to the eighteenth embodiment, the vanishing model 121 is configured by combining three partial vanishing models 122, 123, and 124, so that the shapes of the partial vanishing models 122, 123, and 124 are simplified even when the bearing bracket is complicated. For this reason, since the metal mold | die for shaping each part burnout model 122,123,124 becomes a vertical structure of a simple structure, a complicated mold structure is unnecessary, and a metal mold structure can be simplified as a whole.

In the eighteenth embodiment, the shape of the bearing bracket is determined by three dimensions (A, B, C) shown in FIG. The dimension A is an inner diameter dimension of the housing part of a bearing bracket, and the dimension B is an inner diameter dimension of the hole which fits the rotating side (not shown). These dimensions A and B are determined by the size of the bearing. In addition, the dimension C is the outer diameter of the insertion part (insertion part fitted to a stator frame) of a bearing bracket, and is determined by the frame number of a stator frame. Four types of bearings with a frame number of 90 L, a load side bearing size of 6206, a frame number of 90 L, a half load side bearing size of 6205, a frame number of 100 L, a load side bearing size of 6206, a frame number of 100 L, and a half load side bearing size of 6205. The partial disappearance model required for manufacturing the bracket is as follows. That is, the partial vanishing model 122 for the bearing size 6205, the partial vanishing model 112 for the bearing size 6206, the partial vanishing model 123 for the 90L frame, and the partial vanishing model for the 100L frame number 113 (113) )to be. By appropriately combining these partial disappearance models, the disappearance models of the four types of bearing brackets can be obtained.

Specifically, in the case of manufacturing a bearing bracket having a frame number of 100L and a bearing size of 6206, the burnout obtained by combining the partial burnout model 123 for the frame number with 100L and the partial burnout model 122 for the 6206 bearing size in combination. You can use the model. An example of such a disappearance model (disappearance model of a bearing bracket without a flange portion) is shown in FIG. 42 as a nineteenth embodiment of the present invention.

In the case of manufacturing a flanged bearing bracket, for example, a flange part of FF215 has a flange part and a frame number of 100L and a bearing size of 6206 is manufactured. The burnout model obtained by combining the partial burnout model 123 for the model 124, the frame number 100L and the partial burnout model 122 for the 6206 bearing size is used.

In the eighteenth embodiment, the partial disappearance models 122 to 124 have the same color, but may be colored so that the color of the standard model in the partial disappearance model and the color of the molten model differ.

Specifically, if the bearing bracket with the frame number of 100L, the flange number of FF215, and the bearing size of 6206 is a standard type, each part missing model constituting the missing model for casting the standard bearing bracket is colored white, for example. . On the other hand, if the flange part of the FF265 is an application type, the partial disappearance model for forming the flange part is colored yellow, for example.

As a result, the partial loss model of the standard type and the partial loss model of the application type can be clearly distinguished, and thus, a wrong combination of the partial loss models can be prevented.

43 to 48 show a twentieth embodiment of the present invention and will be described different from the eighteenth embodiment.

43 and 44 show the burnout model 125 of the non-flange bearing bracket. In this case, the burnout model 125 is a partial burnout model. In the center of the right side of Fig. 43 of the burnout model 125, a substantially circular insertion recess 125a is provided. For example, the positioning recesses 125b and 125b protrude from the upper and lower portions of the outer recess portion of the insertion recess 125a. Moreover, the fixing part 125c protrudes in the outer peripheral part of the burnout model 125. As shown in FIG.

45 and 46 show a partial disappearance model 126 for combined coupling to the disappearance model 125.

This partial disappearance model 126 is a partial disappearance model for forming a flange portion of a bearing bracket. An approximately circular insertion recess 126a is formed in the center of the left side of the partial vanishing model 126 in FIG. 45 to fit into the insertion recess 125a of the disappearance model 125. Alignment recesses 126b and 126b are provided in the left and right portions of the circumferential wall of the insertion recess 126a in correspondence with the alignment recesses 125b and 125b of the burnout model 125. In addition, an attachment hole 126c is formed around the partial vanishing model 126.

However, according to the twentieth embodiment, in the case of manufacturing a flanged bearing bracket, the vanishing model 125 and the partial vanishing model 126 are combined to constitute the vanishing model 127 shown in FIGS. 47 and 48. do. In this case, the insertion recess 125a of the burnout model 125 and the insertion recess 126a of the partial vanishing model 126 are fitted together, and the alignment recesses 125b and 125b of the insertion recess 125a are fitted. Positioning of the insertion recesses 126a The fittings 126b and 16b are fitted together to bond the two vanishing models 125 and 126 together.

As a result, the vanishing model 125 and the partial vanishing model 126 are precisely positioned and combined, and as a result, as shown in FIG. 48, the position of the fastener 125c and the vanishing model 126 of the vanishing model 125 are shown. The position of the attachment hole 126c is matched correctly.

49 to 51 show a twenty-first embodiment of the present invention, and different parts from the twentieth embodiment will be described. FIG. 49 shows the disappearance model 130 of the non-flange bearing bracket. In this case, the concave portion 130a for arranging a single weld tube (not shown) is formed in the central portion of the right side of Fig. 49 of the burnout model 130.

FIG. 50 illustrates a partial loss model 131 for coupling to the loss model 130. This partial disappearance model 131 is a partial disappearance model for forming a flange portion of a bearing bracket. An insertion recess 131a is formed at the center of the left side of the partial vanishing model 131 in the middle of the left side of the figure 50 to fit the recess 130a of the vanishing model 130. As a result, when the flange bearing bracket is manufactured, the vanishing model 130 and the partial vanishing model 131 are combined to form the vanishing model 132 shown in the 51st.

In this case, the alignment, ie, the axial centering, can be performed only by fitting the recess 130a of the burnout model 130 and the insertion recess 131a of the partial burnout model 131. In this case, the tip 130a of the burnout model 130 is a tip for arranging a singular weld tube when used as a non-flange bearing bracket, and this recess can be used for positioning so that the configuration for alignment is possible. Can be simplified.

Claims (12)

In a cast product that accommodates the burnt-off model in the sand form and chops the sand and injects the molten metal into the burnt-out model, the part is protruded and fixed to the burnt model to be integrally cast in the cast to the molten metal injector and arsenic Castings containing real parts. The cast product according to claim 1, wherein the cast product is a frame for an electric machine having a hole for ventilation, and the component is a protective member provided in the hole of the frame for the electric machine. The cast product according to claim 2, wherein the protection member is made of a wire mesh or louver. The cast product according to claim 1, wherein the subboom is a reinforcing member which prevents deformation of the vanishing model when sand crushing into the sand formwork. In the casting apparatus that accommodates the burnt-out model 41 in the sand form 42 to compact the sand 43 and injects molten metal into the burned-out model 41 to form a casting. And a vibrator 46 for vibrating the sand form 42 and the sand in the sand form 42, and (b) the vibrating apparatus with the sand form 42 interposed therebetween. And an auxiliary vibrator (47), which is provided opposite to the 46 and imparts vibration to the sand at any position in the sand form (42). The casting apparatus according to claim 5, wherein the auxiliary vibration device (47) is configured to be movable with respect to the disappearance model (41). (a) a step of accommodating a burnt-out model for injection molding a frame for an electric machine in a sand form; and (b) a reinforcing inner mold having an insert part which is approximately equally in contact with an inner circumference of the burnt-out model. After the step of inserting the inner circumferential part, (c) the step of crushing the sand into the sand form with the reinforcing inner mold inserted into the inner circumference of the vanishing model; Forming a frame for the electric machine by injecting molten metal, and (e) forming a frame for the electric machine and then opening the mold and taking out the reinforcing internal mold in the frame for the electric machine; Casting method of the frame for the electric machine consisting of. 8. The electric machine according to claim 7, wherein the frame for the electric machine has a thin thickness and has an insertion portion which makes the reinforcing inner mold substantially equally contact the portion corresponding to the thin part of the burnout model of the frame for the electric machine. Method of casting prem for machine. (a) disposing a reinforcing member having a thin strip-shaped scent in a wave shape by placing it in a loss model for injecting and molding an electric device component, where the strength is insufficient; and (b) the disappearance. (C) sanding the sand into the sand form; and (d) injecting molten metal to melt the reinforcing member evenly after the sanding is completed. A method of casting a component for an electric machine, which comprises a process of molding a component. 10. The casting method according to claim 9, wherein a gas extraction hole for removing gas generated when the reinforcing member is melted is provided near the reinforcing member. (a) combining and constructing a plurality of partial loss models for the injection molding of parts for electric machines, (b) accommodating the combined loss models in sand form, and (c) And (d) injecting molten metal to form the electric machine parts after the sanding step is completed. 12. The alignment recess according to claim 11, wherein the alignment recess and the alignment are provided when the alignment recess provided in one partial loss model and the alignment recess provided in the other partial loss model are combined. A method of casting parts for electric machines, which is configured to fit the recesses.