CN211101451U - Casting mold for motor rotor - Google Patents

Abstract

The utility model relates to the technical field of casting molds, and provides a casting mold for a motor rotor, which comprises a main mold and a top mold on the main mold, wherein the bottom of the main mold is connected with a pouring device, and a casting is arranged in the main mold; the top die is provided with a male die extending into the casting, and a convex ring is further arranged in the casting; a sand core is further arranged between the convex ring of the casting and the convex die and is used for reducing the die drawing angle between the convex ring of the casting and the convex die, and a surrounding edge is arranged on the sand core; and a groove is formed on the convex ring by enclosing the inner wall of the casting and the surrounding edge of the sand core, and the groove is provided with an internal riser used for casting mold feeding of the outline of the convex ring. The utility model discloses improve this casting mould's structure, solve prior art's casting mould, cast foundry goods draft angle is big, and the poor problem of casting mould effect reduces the draft angle effectively, reduces the machining allowance, improves the shaping integrality of foundry goods, improves casting efficiency.

Description

Casting mold for motor rotor

Technical Field

The utility model belongs to the technical field of the casting mould, refer in particular to a casting mould for electric motor rotor.

Background

With the development of industrial casting technology, the process technology for casting different kinds of industrial parts is gradually improved. For example: in the aspect of vehicle parts, vehicles are various, and the motor rotor is different according to various unique vehicle types and engine structures thereof. As a casting manufacturer, corresponding casting equipment and process adjustment are required according to the casting requirements of specific products, so that batch production aiming at the casting requirements is realized.

As shown in fig. 1 to 4, a casting mold for a motor rotor in the prior art comprises a main mold 1 and a top mold 2 thereon, wherein a casting 4 is arranged in the main mold 1, and the casting 4 is a motor rotor to be cast; the bottom of the main mold 1 is connected with a pouring device 3 for pouring casting liquid. The bottom of the top die 2 is provided with a convex die 21 extending into the casting 4, and the shape of the inner surface of the casting 4 is formed through the die-casting matching of the convex die 21 and the main die 1.

The convex ring 41 on the inner surface of the casting 4 is a special structure which needs to be cast according to the casting requirement, but the convex ring 41 on the inner surface of the casting 4 has a larger forming angle due to the die casting only by the convex die 21, so that the shape of the inner surface of the casting 4 needs to be repaired after the die drawing process, the machining allowance is large, and the casting efficiency is low. Further, the upper edge shape of the collar 41 is difficult to mold only by die-casting the inner surface shape of the casting 4 with the punch 21, and hence there is a tendency for defects to occur and the molding effect is poor. Therefore, the motor rotor casting mould in the prior art is difficult to cast products meeting the casting requirement.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a casting mould for electric motor rotor solves prior art's casting mould, and cast foundry goods draft angle is big, and the poor problem of casting mould effect is improved this casting mould's structure, reduces the draft angle effectively, reduces the machining allowance, improves the shaping integrality of foundry goods, improves casting efficiency.

In order to realize the purpose, the utility model discloses a technical scheme is:

a casting mold for a motor rotor comprises a main mold and a top mold on the main mold, wherein the bottom of the main mold is connected with a pouring device, and a casting is arranged in the main mold; the top die is provided with a male die extending into the casting, and a convex ring is further arranged in the casting; a sand core is further arranged between the convex ring of the casting and the convex die and is used for reducing the die drawing angle between the convex ring of the casting and the convex die, and a surrounding edge is arranged on the sand core; and a groove is formed on the convex ring by enclosing the inner wall of the casting and the surrounding edge of the sand core, and the groove is provided with an internal riser used for casting mold feeding of the outline of the convex ring.

The utility model relates to a casting mould for electric motor rotor compares with prior art, combines the psammitolite to cast on casting mould, sets up the psammitolite in the mould, utilizes the removability after the psammitolite casting for reduce the draft angle between bulge loop and the terrace die on the foundry goods internal surface when casting, thereby revise the draft angle, reduce the machining allowance effectively. In addition, in order to complete the casting mould according to the convex ring profile on the inner surface of the casting, an inner riser is arranged in the casting, the inner riser is arranged in a groove formed by the inner wall of the casting and the surrounding edge of the sand core surrounding the convex ring, and the integrity of the convex ring profile casting mould on the inner surface of the casting is effectively improved by utilizing the mould feeding effect of the inner riser, so that the casting quality is improved.

Wherein, the riser of the utility model is a supplementary part which is added above or on the side of the casting to avoid the defect of the casting. During the casting process, the cavity of the riser is a cavity for storing liquid metal, and metal is supplied when the casting is formed. The riser has the main functions of feeding and also has the functions of preventing shrinkage cavity, shrinkage porosity, exhausting and collecting slag. Therefore, the utility model discloses a casting mould has utilized the feeding function of rising head very much, solves the fashioned integrality problem of foundry goods.

The structure of the casting die is further improved, the sand core is an annular sand tray and is sleeved between the casting and the male die, the outer surface of the sand core is spliced with the convex ring of the casting, the gap between the convex ring on the inner surface of the casting and the male die on the top die after die assembly is effectively filled, and then the die drawing angle is repaired.

Furthermore, the internal riser is an annular lantern ring and is embedded in the groove, and the cross section of the internal riser is matched with the groove. On one hand, the profile on the convex ring is cast and formed by utilizing the casting mold feeding function of the internal riser, so that the integrity of the casting mold is ensured; and on the other hand, when the top die is combined for die casting, the gap between the sand core surrounding edge and the inner wall of the casting is filled, so that the compactness of the inner cavity of the whole die is improved, and the casting forming of the casting is ensured.

Still further, still be equipped with location structure between the psammitolite with the terrace die, location structure includes location convex part on the psammitolite inner wall, and the knot piece on the terrace die periphery, still be equipped with the catching groove on the location convex part, the catching groove with the position cooperation of knot piece and mutual lock joint. Because the sand core is of an annular sand plate structure and the inner surface of a casting is a smooth surface and is difficult to position, the sand core is combined with splicing of a male die during die casting, the inner wall of the sand core is provided with a corresponding positioning convex part, and the positioning convex part is provided with a buckling groove and is in buckling fit with a buckling block on the male die, so that the position of the sand core is effectively positioned, the sand core is fixed, and the sand core can be stably combined with a die for casting.

On the basis, the buckling groove is an L type groove body arranged on the positioning convex part, the top of the positioning convex part is provided with a notch of the buckling groove, so that the buckling block on the male die slides into the buckling groove from the notch and is screwed in the groove body.

The feeding problem of the casting is further improved, a top riser is further arranged at the top of the casting, the top riser comprises a plurality of sub risers connected to the top surface of the casting and a connecting ring, and the sub risers are arranged at the top of the casting at intervals; the connecting ring is sleeved on the peripheries of the plurality of sub riser heads and is connected with each sub riser head. Aiming at the integrity problem of the top profile casting mold of the casting, the top of the casting is provided with the top dead head which is in an annular structure and comprises a connecting ring and sub dead heads connected to the top of the casting, and the sub dead heads are connected through the connecting ring to form a whole, so that the hardness of the top dead head can be enhanced, the top of the casting can be effectively fed, the integrity of the top profile casting mold of the casting can be effectively ensured, and the casting quality can be improved.

On the basis, the bottom of the top die is also provided with a sleeve cavity matched with the shape of the top dead head. When the die is closed, the top die and the main die are spliced to contain the top riser, and the production efficiency is improved by combining casting.

The pouring structure of the casting mold is further improved, a cavity for accommodating the casting is arranged in the main mold, a plurality of pouring channels are arranged at the bottoms of the cavity, and a plurality of pouring nozzles matched with the pouring channels are arranged on the pouring device; one end of the pouring gate is connected with the bottom of the casting, and the other end of the pouring gate penetrates through the bottom of the main mold and is connected with the pouring nozzle. And pouring the casting liquid into the mold from the bottom of the main mold by using the pouring device, and quickly filling the cavity of the mold by each pouring gate in the cavity of the main mold to cast the casting.

Furthermore, the pouring gate is a funnel-shaped groove body which is gradually narrowed from top to bottom so as to form a multi-point pouring mode. The bottom of the casting after casting is formed with funnel-shaped pouring allowance corresponding to the pouring gate, compared with the prior art, the pouring allowance is greatly reduced, the machine cutting amount is effectively reduced, and material waste is avoided.

Still further, the plurality of runners arranged at the bottom of the accommodating cavity are eccentric funnel-shaped groove bodies inclined towards the same side. When the casting liquid is injected into each pouring gate from the pouring nozzle by the pouring device, a spiral pouring mode is formed, so that the flow speed of the injected casting liquid is accelerated, and the casting efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

FIG. 1 is an exploded view of a prior art motor rotor casting mold;

FIG. 2 is a perspective view of a prior art casting;

FIG. 3 is a perspective view of a prior art casting;

FIG. 4 is a cross-sectional view of a prior art casting;

fig. 5 is an exploded view of a casting mold structure for a motor rotor according to the present invention;

fig. 6 is an exploded view of the casting mold structure for the motor rotor of the present invention;

FIG. 7 is a perspective view of a casting according to the present invention;

FIG. 8 is a second perspective view of the casting of the present invention;

FIG. 9 is a cross-sectional view of a casting of the present invention;

fig. 10 is an exploded view of the casting of the present invention.

Reference numerals: 1. performing primary molding; 10. a cavity; 11. a pouring channel; 2. carrying out top die; 21. a male die; 211. buckling blocks; 22. a sleeve cavity; 3. a pouring device; 31. pouring a nozzle; 4. casting; 41. a convex ring; 42. a groove; 43. Pouring the allowance; 5. a sand core; 51. surrounding edges; 52. a positioning projection; 520. a notch; 521. buckling grooves; 6. An inner riser; 7. jacking a riser; 71. a sub-riser; 72. and (7) connecting rings.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 5 to 6 and 9 to 10, an embodiment of the present invention provides a casting mold for a motor rotor, including a main mold 1 and a top mold 2 on the main mold 1, wherein a pouring device 3 is connected to a bottom of the main mold 1, and a casting 4 is arranged in the main mold 1; the top die 2 is provided with a convex die 21 extending into the casting 4, and a convex ring 41 is further arranged in the casting 4; a sand core 5 is further arranged between the convex ring 41 of the casting 4 and the convex die 21, the sand core 5 is used for reducing the die drawing angle between the convex ring 41 of the casting 4 and the convex die 21, and a surrounding edge 51 is arranged on the sand core 5; and a groove 42 is formed on the convex ring 41 by enclosing the inner wall of the casting 4 and the surrounding edge 51 of the sand core 5, and the groove 42 is provided with an internal riser 6 for performing casting mold feeding on the outline of the convex ring 41.

The utility model discloses a casting mould for electric motor rotor has bulge loop 41 to the needs casting mould on 4 casts of foundry goods, combines psammitolite 5 to cast on casting mould, sets up psammitolite 5 in the mould, utilizes the removability after 5 casts of psammitolite for reduce the drawing die angle between bulge loop 41 and the terrace die 21 on 4 internal surfaces of foundry goods when casting, thereby revise the drawing die angle, reduce the machining allowance effectively. The casting method comprises the steps that an inner riser 6 is arranged in a casting 4, the inner riser 6 is arranged in a groove 42 formed by the inner wall of the casting 4 and a surrounding edge 51 of a sand core 5 surrounding the convex ring 41, the integrity of a contour casting of the convex ring 41 on the inner surface of the casting 4 is effectively improved by utilizing the casting feeding effect of the inner riser 6, and the casting quality is improved.

Preferably, as shown in fig. 9 to 10, the sand core 5 is an annular sand tray, and is sleeved between the casting 4 and the male die 21, and the outer surface of the sand core 5 is spliced with the convex ring 41 of the casting 4, so as to effectively fill a gap between the convex ring 41 on the inner surface of the casting 4 and the male die 21 on the top die 2 after die assembly, and effectively repair the die drawing angle.

Preferably, the internal riser 6 is an annular collar, and is embedded in the groove 42, and the cross-sectional shape of the internal riser 6 is matched with the groove 42. On one hand, the profile on the convex ring 41 is cast and formed by utilizing the mold feeding function of the internal riser 6, so that the integrity of the mold is ensured; on the other hand, when the top die 2 is used for die casting, the gap between the surrounding edge 51 of the sand core 5 and the inner wall of the casting 4 is filled, the compactness of the inner cavity of the whole die is improved, and the casting forming of the casting 4 is guaranteed.

Because the sand core 5 is of an annular sand table structure and the inner surface of the casting 4 is a smooth surface and is difficult to position, a positioning structure is arranged between the sand core 5 and the male die 21 in combination with splicing of the male die 21 during die casting. As shown in fig. 6 to 7 and 9 to 10, the positioning structure includes a positioning protrusion 52 on an inner wall of the sand core 5 and a fastening block 211 on an outer periphery of the male die 21, and a fastening groove 521 is further provided on the positioning protrusion 52, and the fastening groove 521 is matched with and fastened to the fastening block 211, so as to effectively position the position of the sand core 5 and fix the sand core 5, so that the sand core 5 can be stably combined with a mold for casting.

In the casting and die assembly process, the top die 2 is assembled from the top surface of the main die 1 to the main die 1 from top to bottom, the male die 21 at the bottom of the top die 2 extends into the casting 4 along with the die assembly operation, due to the limited space in the casting 4, the buckle block 211 on the male die 21 is difficult to extend onto the positioning convex part 51 of the sand core 5 and is in buckling fit with the buckle slot 521, so that the structure of the buckle slot 521 is optimized.

Optimizing the integrity problem of the top profile casting mold of the casting 4, as shown in fig. 7 to 10, the top of the casting 4 is further provided with a top riser 7, the top riser 7 comprises a sub riser 71 connected to the top surface of the casting 4 and a connecting ring 72, the sub riser 71 is provided with a plurality of sub risers, and each sub riser 71 is arranged at the top of the casting 4 at intervals; the connecting ring 72 is sleeved on the peripheries of the plurality of sub-risers 71 and is connected with each sub-riser 71, so that the top risers 7 are connected into a whole, the hardness of the top risers 7 can be enhanced, the top of the casting 4 can be effectively fed, the integrity of the top profile casting of the casting 4 is effectively ensured, and the casting quality is improved.

The top die 2 is matched with the top riser 7, and as shown in fig. 6, a sleeve cavity 22 matched with the top riser 7 in shape is further arranged at the bottom of the top die 2. When the die is closed, the top die 2 and the main die 1 are spliced to accommodate the top riser 7, and the production efficiency is improved by combining casting.

Regarding the pouring structure of the casting mold, as shown in fig. 3, the pouring method of the prior art is to pour the casting 4 by adopting a method of adding a ring-shaped pouring gate to a multi-pouring gate, and this method causes a large amount of machine cutting to be performed on the pouring allowance 43 after the casting 4 is cast in a ring-shaped structure, which results in large workload and material waste. Therefore, the utility model discloses the casting mould is right the pouring structure is optimized. As shown in fig. 5 and 8, a cavity 10 for accommodating the casting 4 is provided in the main mold 1, a plurality of runners 11 are provided at the bottom of the cavity 10, and a plurality of nozzles 31 matched with the runners 11 are provided on the pouring device 3; one end of the pouring channel 11 is connected with the bottom of the casting 4, and the other end of the pouring channel runs through the bottom of the main die 1 and is connected with the pouring nozzle 31. Pouring liquid is poured into the die from the bottom of the main die 1 by the pouring device 3, and then the die cavity of the die is rapidly filled through each pouring gate 11 in the cavity 10 of the main die 1, so as to cast a casting.

Preferably, the pouring gate 11 is a plurality of funnel-shaped grooves which gradually narrow from top to bottom, so as to form a multi-point pouring mode, as shown in fig. 8, after the casting is cast, the pouring allowance 43 of the casting 4 forms a single funnel-shaped structure of the pouring gate 11, compared with the prior art, the pouring allowance 43 is greatly reduced, the machine cutting amount is effectively reduced, and the material waste is avoided.

On the basis, the plurality of pouring channels 11 arranged at the bottom of the cavity 10 are eccentric funnel-shaped groove bodies inclined towards the same side, and as shown in fig. 8, after casting, the pouring allowance 43 forms an eccentric funnel-shaped structure corresponding to the pouring channels 11 and inclined towards the same side. When the pouring device 3 is allowed to pour the casting liquid from the nozzle 31 into each runner 11, a spiral pouring manner is formed to increase the flow rate of the poured casting liquid and improve the casting efficiency.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A casting mold for a motor rotor comprises a main mold and a top mold on the main mold, wherein the bottom of the main mold is connected with a pouring device, and a casting is arranged in the main mold; the top die is provided with a male die extending into the casting, and a convex ring is further arranged in the casting; the casting mould is characterized in that a sand core is arranged between the convex ring of the casting and the convex mould and used for reducing the drawing angle between the convex ring of the casting and the convex mould, and a surrounding edge is arranged on the sand core; and a groove is formed on the convex ring by enclosing the inner wall of the casting and the surrounding edge of the sand core, and the groove is provided with an internal riser used for casting mold feeding of the outline of the convex ring.

2. The casting mold for an electric motor rotor as recited in claim 1, wherein the sand core is an annular sand table that is fitted between the casting and the male mold, and an outer surface of the sand core is fitted with the male ring of the casting.

3. The casting mold for the rotor of the motor as claimed in claim 2, wherein the inner feeder is an annular collar and is embedded in the groove, and the cross-sectional shape of the inner feeder is matched with the groove.

4. The casting mold for the electric motor rotor as recited in claim 1, wherein a positioning structure is further disposed between the sand core and the male mold, the positioning structure includes a positioning protrusion on an inner wall of the sand core and a fastening block on an outer periphery of the male mold, the positioning protrusion is further provided with a fastening groove, and the fastening groove is matched with and fastened to the fastening block.

5. The casting mold for the motor rotor as claimed in claim 4, wherein the catching groove is an L-shaped groove body arranged on the positioning convex part, and the top of the positioning convex part is provided with a notch of the catching groove, so that the catching block on the male die slides into the catching groove from the notch and is screwed in the groove body.

6. The casting mold for the motor rotor as recited in claim 1, wherein the top of the casting is further provided with a top riser, the top riser comprises a plurality of sub risers connected to the top surface of the casting, and a connecting ring, and each sub riser is arranged at intervals on the top of the casting; the connecting ring is sleeved on the peripheries of the plurality of sub riser heads and is connected with each sub riser head.

7. The casting mold for motor rotor as claimed in claim 6, wherein the top mold bottom is further provided with a sleeve cavity matched with the top riser in shape.

8. The casting mold for the motor rotor as recited in any one of claims 1 to 7, wherein a cavity for accommodating the casting is provided in the main mold, a plurality of runners are provided at a bottom of the cavity, and a plurality of nozzles matched with the runners are provided on the pouring device; one end of the pouring gate is connected with the bottom of the casting, and the other end of the pouring gate penetrates through the bottom of the main mold and is connected with the pouring nozzle.

9. The casting mold for the motor rotor as claimed in claim 8, wherein the pouring channel is a funnel-shaped groove body which is gradually narrowed from top to bottom.

10. The casting mold for the motor rotor as recited in claim 9, wherein the plurality of runners provided at the bottom of the cavity are eccentric funnel-shaped troughs inclined to the same side.

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