Extrusion casting die for rolling bearing retainer

Abstract

The invention relates to the technical field of casting, and discloses an extrusion casting mold for a rolling bearing retainer, which comprises an upper mold, a lower mold, a cooling auxiliary mechanism and a cooling liquid circulating mechanism, a downwards-sunken forming groove body is formed in the top of the lower mold and comprises a main body forming part and a plurality of splicing column forming parts. The cooling auxiliary mechanism is arranged and can be used for controlling the cooling speed of the splicing column, heat conduction of the splicing column is reduced through a gap between the isolation sleeve and the splicing column forming part in the early cooling stage so as to slow down the heat dissipation speed of the splicing column, and cooling fins are driven to gradually extend into the gap in the middle cooling stage so as to reduce the heat dissipation speed of the splicing column. The heat dissipation fins are used as heat conduction media, the heat dissipation speed of the splicing columns is gradually increased, the cooling speed of the splicing columns and the cooling speed of other positions of the retainer can be kept close, and then the problem that the cooling degree of the splicing columns and the cooling degree of other positions differ greatly is solved.

Description

Technical Field

[0001] The invention relates to the technical field of casting, and more particularly to an extrusion casting mold for a rolling bearing retainer. Background Art

[0002] Compared with ordinary bearings, rolling bearings can not only withstand radial loads at high speeds, but also bidirectional axial loads due to their deep groove raceways and excellent fit between the raceways and the steel balls. They are commonly used in motors, automobile wheels, and home appliances. The cage is a pipe component of the rolling bearing. It is mainly located between the rollers of the bearing and serves to separate and guide the rolling elements. Most of them use two half cages and are fixed by rivets.

[0003] At present, in the production and manufacturing process of rolling bearing cages, a casting process is generally used for cages with complex structural shapes. In the prior art, in order to solve the problem of fatigue fracture and rivet head falling off caused by fretting wear caused by loose rivets, such as Figures 9 to 11 As shown, a self-riveting structure retainer appears, which replaces the rivet head by arranging multiple integrated splicing columns on the butt end face of one half of the retainer. After the two retainers are butt-jointed, pressure is applied to the top of the rivet head to deform it, thereby forming an integrated rivet structure.

[0004] However, when using traditional casting molds to cast this special cage with splicing columns, the butt-jointed cylinder has a relatively large surface area to volume ratio due to its small size, and is easier to dissipate heat than other larger parts during the cooling process. When the degree of cooling of the splicing column is different from that of other positions, it will cause internal stress in the splicing column, making it easy to deform, thereby affecting the dimensional accuracy of the splicing column. In addition, the existence of internal stress may also cause the cylinder to crack during use, reducing the reliability of the bearing cage. Therefore, there is an urgent need for a casting mold that can be used for rolling bearing cages with integrated splicing columns. Summary of the invention

[0005] The purpose of the present invention is to provide an extrusion casting mold for a rolling bearing cage to solve the above-mentioned technical problems.

[0006] The present invention solves the above-mentioned technical problems through the following technical solutions: The present invention provides an extrusion casting die for a rolling bearing cage, comprising: an upper die, a lower die, a cooling auxiliary mechanism and a cooling liquid circulation mechanism; The top of the lower mold is provided with a downwardly concave forming trough body, the forming trough body includes a main body forming part and a plurality of splicing column forming parts, the plurality of splicing column forming parts are evenly distributed on the bottom wall of the main body forming part, and the bottom of the lower mold is provided with a cooling trough body; The cooling auxiliary mechanism is arranged in the cooling tank body, and the cooling auxiliary mechanism includes a rotation drive component and cooling components of the same number as the splicing column forming part. The cooling component includes an isolation sleeve, eight heat sinks, a suction piece and a telescopic drive piece. The isolation sleeve is sleeved on the outer side of the splicing column forming part, and its outer side is fixed to the inner wall of the cooling tank body. A gap is left between the inner side of the isolation sleeve and the outer side of the splicing column forming part. Several heat sinks are evenly slidably installed on the outer side of the isolation sleeve. The telescopic drive piece is connected to the eight heat sinks at the same time, and is used to drive the eight heat sinks to synchronously slide linearly relative to the isolation sleeve. The rotation drive component is connected to several telescopic drive pieces, and is used to drive several telescopic drive pieces to move at the same time. The suction piece is slidably arranged at the bottom end of the isolation sleeve, and is used to draw or squeeze the coolant in the cooling tank body into the isolation sleeve.

[0007] As a further optimization scheme of the present invention, the telescopic driving member includes a rotating driving part and a transmission part. The top of the rotating driving part is slidably connected with the bottom ends of eight heat sinks, and the rotating driving part is transmission-connected with the rotating driving assembly through the transmission part.

[0008] As a further optimization scheme of the present invention, the rotating driving part includes a rotating cylinder, which is rotatably sleeved on the bottom end of the isolation sleeve. The top surface of the rotating cylinder is provided with arc grooves with the same number as the heat sinks, and the bottoms of several heat sinks are respectively slidably connected with the several arc grooves in a one-to-one correspondence.

[0009] As a further optimization scheme of the present invention, the transmission part includes a connecting gear ring and an incomplete gear, the connecting gear ring is fixedly installed on the bottom of the rotating cylinder, one side of the incomplete gear is meshed with the connecting gear ring, and the bottom of the incomplete gear is connected to the driving end of the rotating drive assembly.

[0010] As a further optimization scheme of the present invention, the suction piece includes a sealing plug and a lifting driving part. The sealing plug is slidably installed on the bottom end of the isolation sleeve. The lifting driving part is fixed to the bottom of the sealing plug, and is used to drive the sealing plug to slide and rise and fall along the inner side of the isolation sleeve. The top surface of the sealing plug is provided with a plurality of through gaps that are compatible with the heat sink. The bottom of the heat sink is slidably connected to the upper end of the through gaps, and one side of the isolation sleeve is connected to the outer side of the lower mold through an exhaust pipe.

[0011] As a further optimization scheme of the present invention, the lifting and lowering driving part includes a connecting cylinder, a threaded rod and a mating gear. The connecting cylinder is threadedly sleeved on the outside of the threaded rod, and its top end is fixedly connected to the bottom of the sealing plug. The mating gear is fixedly installed on the bottom end of the threaded rod. When the incomplete gear is separated from the connecting gear ring, one side of it is engaged with the mating gear.

[0012] As a further optimization scheme of the present invention, the rotating drive assembly includes a driving motor, a first gear, an inner gear ring and second gears of the same number as the cooling assembly, the driving motor is fixedly mounted on the outer side of the lower mold, the first gear is fixedly mounted on the rotating end of the driving motor, a plurality of the second gears are respectively fixed in one-to-one correspondence with a plurality of incomplete gears, the inner gear ring is rotatably mounted on the bottom of the lower mold, and its inner ring surface is meshed with a plurality of second gears.

[0013] As a further optimization solution of the present invention, a plurality of linearly evenly distributed heat dissipation slots are provided on one side of the heat sink, the heat sink is a rectangular copper sheet, and the number of the heat sinks is eight.

[0014] As a further optimization solution of the present invention, the splicing column forming part is a cylindrical trough body, and the number of the splicing column forming parts is three.

[0015] As a further optimization solution of the present invention, the bottom of the upper mold is provided with an annular molding groove matched with the molding groove body, and the top of the upper mold is provided with a plurality of circumferentially distributed introduction pipes.

[0016] The beneficial effects of the present invention are: The present invention can be used to control the cooling speed of the splicing column by arranging a cooling auxiliary mechanism. In the initial cooling stage, the gap between the isolating sleeve and the splicing column forming portion is used to reduce the heat conduction of the splicing column to slow down the heat dissipation speed of the splicing column. In the middle cooling stage, the heat sink is driven to gradually extend into the gap, and the heat sink is used as a heat conduction medium to gradually increase the heat dissipation speed of the splicing column, which is beneficial to keep the cooling speed of the splicing column and other positions of the retaining frame similar, thereby avoiding the problem of deviation in dimensional accuracy of the splicing column and cracking of the splicing column during subsequent use due to the large difference in cooling degree between the splicing column and other positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an extrusion casting mold of a rolling bearing cage provided by the present invention; Figure 2 It is an exploded schematic diagram of an extrusion casting mold of a rolling bearing cage provided by the present invention; Figure 3It is a schematic diagram of the structure inside the lower mold in an extrusion casting mold of a rolling bearing cage provided by the present invention; Figure 4 It is a cross-sectional view of an extrusion casting mold of a rolling bearing cage provided by the present invention; Figure 5 The present invention Figure 4 A local enlarged schematic diagram of the middle A; Figure 6 It is a cross-sectional view of a cooling component in an extrusion casting mold of a rolling bearing cage provided by the present invention; Figure 7 It is a schematic structural diagram between a rotating cylinder and a heat sink in an extrusion casting mold of a rolling bearing cage provided by the present invention; Figure 8 It is a structural schematic diagram of a rotary drive assembly in an extrusion casting mold of a rolling bearing cage provided by the present invention; Fig. 9 It is a structural schematic diagram of an existing rolling bearing cage; Fig.10 The exploded view of the existing rolling bearing cage; Fig.11 A half rolling bearing cage cast by the casting mold of the present invention.

[0018] In the figure: 1. upper mold; 2. lower mold; 3. cooling auxiliary mechanism; 31. rotating drive assembly; 311. driving motor; 312. first gear; 313. inner gear ring; 314. second gear; 32. cooling assembly; 321. isolation sleeve; 322. heat sink; 323. rotating cylinder; 324. arc groove; 325. connecting gear ring; 326. incomplete gear; 327. sealing plug; 328. through gap; 329. connecting cylinder; 3210. threaded rod; 3211. matching gear; 3212. heat sink; 3213. exhaust pipe; 4. coolant circulation mechanism; 5. molding trough body; 51. main body molding part; 52. splicing column molding part; 6. cooling trough body; 7. annular molding groove; 8. introduction pipe; 9. splicing shaft; 10. retaining frame body. DETAILED DESCRIPTION

[0019] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0020] Please refer to Figures 1 to 5 A squeeze casting mold for a rolling bearing cage comprises: an upper mold 1, a lower mold 2, a coolant circulation mechanism 4 and a cooling auxiliary mechanism 3, wherein a downwardly recessed forming trough body 5 is provided on the top of the lower mold 2, the forming trough body 5 comprises a main forming part 51 and three splicing column forming parts 52, the three splicing column forming parts 52 are evenly distributed circumferentially on the bottom wall of the main forming part 51, a cooling trough body 6 is provided on the bottom of the lower mold 2, an annular forming groove 7 matched with the forming trough body 5 is provided on the bottom of the upper mold 1, a plurality of circumferentially distributed introduction pipes 8 are provided on the top of the upper mold 1, and the pouring liquid is evenly introduced into the forming trough body 5 through the introduction pipes 8, the upper mold 1 and the lower mold 2 are spliced ​​and fixed together by a plurality of fastening bolts, the coolant circulation mechanism 4 is connected with the cooling trough body 6 through a pipeline, so that the coolant can circulate in the cooling trough body 6, and the cage in the forming trough body 5 is quickly cooled down.

[0021] Please refer to Figures 3 to 7 The cooling auxiliary mechanism 3 is arranged in the cooling tank body 6. The cooling auxiliary mechanism 3 includes a rotating drive assembly 31 and cooling assemblies 32 having the same number as the splicing column forming part 52. The cooling assembly 32 includes an isolation sleeve 321, eight heat sinks 322, a suction member, and a telescopic drive member. The isolation sleeve 321 is sleeved on the outer side of the splicing column forming part 52, and its outer side is fixed to the inner side wall of the cooling tank body 6. A gap is left between the inner side of the isolation sleeve 321 and the outer side of the splicing column forming part 52. The eight heat sinks 322 are evenly slidably mounted on the isolation sleeve 321. On the outside, one side of the heat sink 322 is provided with four linearly evenly distributed heat dissipation grooves 3212, the heat sink 322 is a rectangular copper sheet, the telescopic drive member is connected to the eight heat sinks 322 at the same time, and is used to drive the eight heat sinks 322 to synchronously slide linearly relative to the isolation sleeve 321, the rotation drive assembly 31 is connected to a plurality of telescopic drive members, and is used to drive a plurality of telescopic drive members to move at the same time, and the suction member is slidably arranged at the bottom end of the isolation sleeve 321, and is used to draw or squeeze the coolant in the cooling trough body 6 into the isolation sleeve 321.

[0022] It should be noted that when the retainer is cast using the above-mentioned casting mold, the pouring liquid begins to cool after entering the interior of the molding tank body 5. The coolant is circulated in the molding tank body 5 by the operation of the coolant rotating mechanism, thereby cooling the retainer. During cooling, due to the presence of the isolation sleeve 321, the coolant is isolated from the splicing column molding part 52, so that the coolant cannot temporarily contact the splicing column molding part 52. At the same time, there is a gap between the isolation sleeve 321 and the splicing column molding part 52, which further slows down the heat conduction from the splicing column molding part 52 to the isolation sleeve 321. In this way, the coolant can first cool other positions of the retaining frame, and the heat dissipation speed of the splicing column position is slowed down. After the temperature of other positions drops to a preset value, the heat dissipation effect of the splicing column begins to be gradually increased. Specifically, the rotating drive component 31 can drive the three telescopic drive members connected thereto to move synchronously, so that the telescopic drive member can first drive the eight corresponding heat sinks 322 to extend into the isolation sleeve 321 together. After extending to a preset length, the rotating drive component 31 stops driving. At this time, since the distance between the heat sink 322 and the splicing column forming portion 52 is shortened, the splicing column can be The heat at the column forming part 52 can be conducted to the coolant through the heat sink 322, so as to increase the cooling speed of the spliced ​​column. By successively shortening the distance between the heat sink 322 and the spliced ​​column forming part 52, the cooling speed of the spliced ​​column can be gradually increased. In this way, the cooling speed of the spliced ​​column can be gradually slowed down, so that the cooling speed of the spliced ​​column is kept close to the cooling speed of other positions of the retainer. In this way, the problem of deviation in the dimensional accuracy of the spliced ​​column and cracking of the spliced ​​column during subsequent use due to the large difference in cooling degree between the spliced ​​column and other positions can be avoided. When one side of the heat sink 322 contacts the outer side of the splicing column forming portion 52, the heat dissipation effect of the heat sink 322 is the strongest at this time. However, since the temperature of the splicing column and other positions of the retaining frame is relatively low, and the heat dissipation effect of the splicing column alone is difficult to match the heat dissipation speed of other positions of the retaining frame, the suction part is moved by rotating the drive assembly 31 to draw the coolant into the isolation sleeve 321, and the coolant is used to cool the splicing column until the entire retaining frame is completely cooled, and then the coolant is squeezed out of the isolation sleeve 321 by the suction part, and the heat sink 322 moves to a contracted state.

[0023] Please refer to Figures 5 to 7The telescopic driving member includes a rotating driving part and a transmission part. The top of the rotating driving part is slidably connected with the bottom ends of the eight heat sinks 322. The rotating driving part is transmission-connected with the rotating driving assembly 31 through the transmission part. The rotating driving part includes a rotating cylinder 323. The rotating cylinder 323 is rotatably sleeved on the bottom end of the isolation sleeve 321. The top surface of the rotating cylinder 323 is provided with arc grooves 324 with the same number as the heat sinks 322. The bottoms of the eight heat sinks 322 are slidably connected with the eight arc grooves 324 in a one-to-one correspondence. The transmission part includes a connecting gear ring 325 and an incomplete gear 326. The connecting gear ring 325 is fixedly installed at the bottom of the rotating cylinder 323. One side of the incomplete gear 326 is meshed with the connecting gear ring 325. The bottom of the incomplete gear 326 is connected to the driving end of the rotating driving assembly 31.

[0024] It should be noted that when the telescopic drive member drives the heat sink 322 to telescope, it is driven by the rotating drive assembly 31 to drive the incomplete gear 326 to rotate. The connecting gear ring 325, driven by the incomplete gear 326, synchronously drives the rotating cylinder 323 to rotate, and the arc groove 324 drives the heat sink 322 to slide linearly synchronously, so that the heat sink 322 gradually extends toward the inside of the isolation sleeve 321. When the rotating cylinder 323 stops rotating, the heat sink 322 also stops sliding. When the incomplete gear 326 separates from the connecting gear ring 325, one side of the heat sink 322 just slides and contacts the outside of the splicing column forming part 52, and the incomplete gear 326 no longer continues to drive the connecting gear ring 325 to rotate.

[0025] Please refer to Figures 5 and 6 The suction piece includes a sealing plug 327 and a lifting driving part. The sealing plug 327 is slidably installed at the bottom end of the isolation sleeve 321. The lifting driving part is fixed to the bottom of the sealing plug 327, and is used to drive the sealing plug 327 to slide and rise and fall along the inner side of the isolation sleeve 321. The top surface of the sealing plug 327 is provided with eight through gaps 328 adapted to the heat sink 322. The bottom of the heat sink 322 is slidably connected to the upper end of the through gaps 328. One side of the isolation sleeve 321 is connected to the outer side of the lower mold 2 through the exhaust pipe 3213. The sealing plug 327 can be made of rubber. When the sealing plug 327 is at the bottom of the isolation sleeve 321, its through gap 328 is in a closed state, so the bottom end of the isolation sleeve 321 can be sealed. The lifting drive part includes a connecting cylinder 329, a threaded rod 3210 and a matching gear 3211. The connecting cylinder 329 is threadedly sleeved on the outside of the threaded rod 3210, and its top end is fixedly connected to the bottom of the sealing plug 327. The matching gear 3211 is fixedly installed on the bottom end of the threaded rod 3210. When the incomplete gear 326 is separated from the connecting gear ring 325, one side of it is just meshed with the matching gear 3211.

[0026] It should be noted that when the cooling water is pumped into the rotating cylinder 323 by the above-mentioned suction member, the incomplete gear 326 has been separated from the connecting gear ring 325 and is just engaged with the matching gear 3211. By continuing to drive the rotating drive assembly 31, the incomplete gear 326 can drive the matching gear 3211 to rotate, and the threaded rod 3210 rotates with the matching gear 3211. Since the sealing plug 327 is slidably connected to the bottom of the heat sink 322, the heat sink 322 acts as a limit to the sealing plug 327. When the threaded rod 3210 rotates, the connecting cylinder 329 and the sealing plug 327 can move upward along the inner side of the isolation sleeve 321. Since the sealing plug 327 is provided with a through gap 328 adapted to the heat sink 322, the sealing plug 327 can move upward along the heat sink 322 without being hindered by the heat sink 322. During the upward movement of the sealing plug 327, the gas at the upper end of the inner side of the isolation sleeve 321 is squeezed out of the lower mold 2 through the exhaust pipe 3213, and the coolant is discharged from the sealing plug 327. The sealing plug 327 quickly enters the isolation sleeve 321 under the suction force. When the sealing plug 327 moves up to contact the inner top wall of the isolation sleeve 321, the rotation drive component 31 stops driving, and the coolant fills the interior of the isolation sleeve 321 and contacts the outer side of the splicing column forming part 52, thereby further cooling the splicing column. When the entire retainer is cooled, the incomplete gear 326 is driven in the reverse direction by the rotation drive component 31 to rotate, so that the sealing plug 327 gradually moves down and squeezes the coolant out of the isolation sleeve 321 until the incomplete The gear 326 is separated from the mating gear 3211, and the incomplete gear 326 is meshed with the connecting gear ring 325 again, thereby driving the heat sink 322 to move and reset. In this way, when the telescopic drive member is used in conjunction with the rotary drive assembly 31, the heat sink 322 can be driven to perform linear extension and contraction, thereby realizing the gradual cooling function of the splicing column. When the telescopic drive member, the rotary drive assembly 31 and the suction member are used in conjunction, the coolant can automatically enter and exit the isolation sleeve 321 to realize the further cooling function of the splicing column.

[0027] Please refer to Figure 3 and Figure 8 The rotating drive assembly 31 includes a driving motor 311, a first gear 312, an inner gear ring 313 and second gears 314 having the same number as the cooling assembly 32. The driving motor 311 is fixedly mounted on the outer side of the lower mold 2. The driving motor 311 can be a reduction motor. The first gear 312 is fixedly mounted on the rotating end of the driving motor 311. The three second gears 314 are fixed one by one with the three incomplete gears 326 respectively. The inner gear ring 313 is rotatably mounted on the bottom of the lower mold 2, and its inner ring surface is meshed with a plurality of second gears 314.

[0028] It should be noted that when the above-mentioned rotating drive assembly 31 is in use, the first gear 312 can drive the inner gear ring 313 to rotate by driving the motor 311, and the three second gears 314 rotate synchronously under the driving action of the inner gear ring 313, and respectively drive the corresponding incomplete gears 326 to rotate.

[0029] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. An extrusion casting mold for a rolling bearing cage, characterized in that: include: An upper mold (1), a lower mold (2), a cooling auxiliary mechanism (3), and a coolant circulation mechanism (4); The top of the lower mold (2) is provided with a downwardly recessed forming trough body (5), the forming trough body (5) comprising a main body forming portion (51) and a plurality of splicing column forming portions (52), the plurality of splicing column forming portions (52) being evenly distributed circumferentially on the bottom wall of the main body forming portion (51), and the bottom of the lower mold (2) is provided with a cooling trough body (6); The auxiliary cooling mechanism (3) is arranged in the cooling trough body (6), and comprises a rotation drive assembly (31) and cooling assemblies (32) of the same number as the splicing column forming part (52), and the cooling assembly (32) comprises an isolation sleeve (321), eight heat sinks (322), a suction piece, and a telescopic drive piece, the isolation sleeve (321) being sleeved on the outside of the splicing column forming part (52), the outside of which is fixed to the inner side wall of the cooling trough body (6), and the inner side of the isolation sleeve (321) is fixed to the outer side of the splicing column forming part (52). A gap is left, and a plurality of the heat sinks (322) are evenly slidably mounted on the outside of the isolation sleeve (321); the telescopic drive member is simultaneously connected to the eight heat sinks (322) and is used to drive the eight heat sinks (322) to synchronously perform linear sliding relative to the isolation sleeve (321); the rotary drive assembly (31) is connected to the plurality of telescopic drive members and is used to drive the plurality of telescopic drive members to move simultaneously; the suction member is slidably arranged at the bottom end of the isolation sleeve (321) and is used to draw or squeeze the coolant in the cooling trough body (6) into the isolation sleeve (321).

2. The extrusion casting mold of a rolling bearing cage according to claim 1, characterized in that: The telescopic driving member comprises a rotating driving part and a transmission part, the top of the rotating driving part is slidably connected with the bottom ends of eight heat sinks (322), and the rotating driving part is transmission-connected with the rotating driving assembly (31) via the transmission part.

3. The extrusion casting mold of a rolling bearing cage according to claim 2, characterized in that: The rotating driving part comprises a rotating cylinder (323), the rotating cylinder (323) being rotatably sleeved on the bottom end of the isolation sleeve (321), the top surface of the rotating cylinder (323) being provided with arc grooves (324) having the same number as the heat sinks (322), and the bottoms of a plurality of the heat sinks (322) being slidably connected to the plurality of arc grooves (324) in a one-to-one correspondence.

4. The extrusion casting mold of a rolling bearing cage according to claim 3, characterized in that: The transmission part comprises a connecting gear ring (325) and an incomplete gear (326); the connecting gear ring (325) is fixedly mounted on the bottom of the rotating cylinder (323); one side of the incomplete gear (326) is meshed with the connecting gear ring (325); and the bottom of the incomplete gear (326) is connected to the driving end of the rotating drive assembly (31).

5. The extrusion casting mold for a rolling bearing cage according to claim 4, characterized in that: The suction member comprises a sealing plug (327) and a lifting driving part. The sealing plug (327) is slidably mounted on the bottom end of the isolation sleeve (321). The lifting driving part is fixed to the bottom of the sealing plug (327) and is used to drive the sealing plug (327) to slide and rise and fall along the inner side of the isolation sleeve (321). The top surface of the sealing plug (327) is provided with a plurality of through slits (328) adapted to the heat sink (322). The bottom of the heat sink (322) is slidably connected to the upper end of the through slits (328). One side of the isolation sleeve (321) is connected to the outer side of the lower mold (2) via an exhaust pipe (3213).

6. The extrusion casting mold for a rolling bearing cage according to claim 5, characterized in that: The lifting driving part comprises a connecting cylinder (329), a threaded rod (3210) and a matching gear (3211); the connecting cylinder (329) is threadedly sleeved on the outside of the threaded rod (3210), and its top end is fixedly connected to the bottom of the sealing plug (327); the matching gear (3211) is fixedly installed on the bottom end of the threaded rod (3210); when the incomplete gear (326) is separated from the connecting gear ring (325), one side of the incomplete gear (326) is meshed with the matching gear (3211).

7. The extrusion casting mold for a rolling bearing cage according to claim 6, characterized in that: The rotary drive assembly (31) comprises a drive motor (311), a first gear (312), an inner gear ring (313) and the same number of second gears (314) as the cooling assembly (32); the drive motor (311) is fixedly mounted on the outer side of the lower mold (2); the first gear (312) is fixedly mounted on the rotating end of the drive motor (311); a plurality of the second gears (314) are respectively fixed in one-to-one correspondence with a plurality of incomplete gears (326); the inner gear ring (313) is rotatably mounted on the bottom of the lower mold (2); and its inner ring surface is meshed with a plurality of second gears (314).

8. The extrusion casting mold for a rolling bearing cage according to claim 1, characterized in that: A plurality of heat dissipation slots (3212) that are evenly distributed linearly are provided on one side of the heat dissipation fin (322); the heat dissipation fin (322) is a rectangular copper sheet, and the number of the heat dissipation fins (322) is eight.

9. The extrusion casting mold for a rolling bearing cage according to claim 1, characterized in that: The splicing column forming part (52) is a cylindrical trough body, and there are three splicing column forming parts (52).

10. The extrusion casting mold of a rolling bearing cage according to claim 1, characterized in that: The bottom of the upper mold (1) is provided with an annular molding groove (7) matched with the molding groove body (5), and the top of the upper mold (1) is provided with a plurality of circumferentially distributed introduction pipes (8).

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