Rotor mold exhaust structure and rotor mold
By designing the exhaust structure in the rotor mold, including the moving mold kernel and the exhaust needle, the problem of the cast aluminum rotor being prone to internal pore defects during the die casting process is solved, and the optimized cast aluminum effect and improved motor performance and life are achieved.
Patent Information
- Application Number
- CN202421560294.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-03
AI Technical Summary
Cast aluminum rotors are prone to internal pore defects during die casting, which affects the life, noise and performance of the motor.
A rotor mold exhaust structure is designed, including a moving mold core and an exhaust needle installed in the moving mold core. A plurality of overflow grooves are arranged on the upper part of the moving mold core. The exhaust needle is installed on the lower part of the moving mold core and corresponds to the overflow groove to form an exhaust passage to release the gas inside the mold.
It effectively avoids pores or other internal defects inside the rotor and rotor end rings, optimizes the cast aluminum effect of the rotor, improves the motor performance and service life, and ensures smooth filling of metal liquid, reducing the risk of insufficient or uneven filling.
Smart Images
Figure CN223028429U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motor rotor molds, and particularly relates to an exhaust structure for a rotor mold and a rotor mold. Background Art
[0002] A cast aluminum rotor is a rotor made of aluminum alloy material through a casting process, and is usually used in motors and generators. The cast aluminum rotor is widely used due to its excellent thermal conductivity, good mechanical strength and cost effectiveness.
[0003] The cast aluminum rotor is formed by injecting high-temperature aluminum liquid into the cavity of the cast aluminum mold in a specific die-casting equipment, and then the high-temperature aluminum liquid is quickly cooled and demolded. However, in the cast aluminum end ring of the rotor, there will always be internal pore defects more or less, which will have a great impact on the life, noise and performance of the motor.
[0004] Therefore, it is necessary to provide a new way to solve the above technical problems. Summary of the Utility Model
[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide an exhaust structure for a rotor mold, which can avoid the formation of pores or other internal defects inside the rotor and the rotor end ring, optimize the cast aluminum effect of the rotor, improve the performance of the motor, and extend the service life of the motor; moreover, good exhaust can also ensure that the molten metal can fill the mold more smoothly, reducing the risk of insufficient filling or uneven filling.
[0006] The technical solution of the utility model is outlined as follows:
[0007] An exhaust structure for a rotor mold, comprising:
[0008] A moving mold core and a plurality of exhaust needles installed in the moving mold core; wherein,
[0009] A plurality of overflow grooves are evenly arranged around the center on the upper part of the moving mold core;
[0010] The exhaust needles are installed at the lower part of the moving mold core and are corresponding to the positions of the overflow grooves, and one end of the exhaust needle extends to the overflow groove;
[0011] An exhaust channel is formed between the exhaust needle and the moving mold core; the exhaust channel is communicated with the overflow groove to release the internal gas during the die-casting process of the mold.
[0012] Preferably, the exhaust needle is a double-section exhaust needle.
[0013] Preferably, the exhaust needle at least includes a fitting section and an exhaust section; wherein,
[0014] The fitting section is in fit with the shaft hole of the moving mold core to form an exhaust gap.
[0015] The diameter of the exhaust section is smaller than that of the fitting section to form an exhaust passage.
[0016] Preferably, the difference between the diameter of the exhaust section and the diameter of the fitting section is 0.5 mm - 1 mm.
[0017] Preferably, the fitting section includes a first fitting section and a second fitting section; wherein, the first fitting section is arranged close to the overflow groove, the second fitting section is arranged close to the installation part of the exhaust needle, and the exhaust section is located between the first fitting section and the second fitting section.
[0018] Preferably, an exhaust groove is further formed between the second fitting section, the installation part and the moving mold core.
[0019] Preferably, at least two exhaust needles are correspondingly arranged below each overflow groove.
[0020] Preferably, the moving mold core is provided with at least four overflow grooves, and the exhaust needles are provided with at least eight.
[0021] Preferably, the two exhaust needles are respectively arranged close to the two end parts of the overflow groove.
[0022] The present utility model further provides a rotor mold, including the rotor mold exhaust structure as described above.
[0023] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0024] The present utility model provides a rotor mold exhaust structure, including: a moving mold core and a plurality of exhaust needles installed in the moving mold core; wherein, a plurality of overflow grooves are evenly arranged around the center on the upper part of the moving mold core; the exhaust needles are installed on the lower part of the moving mold core and are in correspondence with the positions of the overflow grooves, and one end of the exhaust needle extends to the overflow groove; an exhaust passage is formed between the exhaust needle and the moving mold core; the exhaust passage is communicated with the overflow groove to release the gas inside the mold during the die-casting process; in the rotor die-casting process of the present utility model, the air and the gas released by the material inside the mold will flow to the overflow groove, and then be pushed to the exhaust passage formed between the exhaust needle and the moving mold core to be discharged from the mold, so as to avoid forming pores or other internal defects inside the rotor and the rotor end ring, optimize the rotor aluminum casting effect, improve the motor performance and extend the service life of the motor; moreover, good exhaust can also ensure that the molten metal can fill the mold more smoothly, reduce the risk of insufficient filling or uneven filling, and thus improve the integrity of the casting.
[0025] The above description is only an overview of the technical solution of the present utility model. In order to better understand the technical means of the present utility model and be implemented in accordance with the content of the description, the following describes in detail with reference to the preferred embodiments of the present utility model and the accompanying drawings. The specific implementation manners of the present utility model are given in detail by the following embodiments and their accompanying drawings. Brief Description of the Drawings
[0026] The drawings described herein are used to provide a further understanding of the present utility model, and constitute a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model, and do not constitute an improper limitation to the present utility model. In the drawings:
[0027] Figure 1 is a sectional view of the exhaust structure of the rotor mold in Embodiment 1 of the present utility model;
[0028] Figure 2 is Figure 1 an enlarged view of part A of
[0029] Figure 3 is a schematic structural view of the exhaust needle in Embodiment 1 of the present utility model;
[0030] Figure 4 is a schematic structural view of the exhaust groove in Embodiment 1 of the present utility model;
[0031] Figure 5 is a schematic structural view of the installation structure of the moving mold core and the exhaust needle in Embodiment 1 of the present utility model Figure 1 ;
[0032] Figure 6 is a schematic structural view of the installation structure of the moving mold core and the exhaust needle in Embodiment 1 of the present utility model Figure 2 .
[0033] In the figure:
[0034] 10. Moving mold core; 11. Overflow groove; 12. Shaft hole;
[0035] 20. Exhaust needle; 21. Fitting section; 211. First fitting section; 212. Second fitting section; 2121. Second notch; 22. Exhaust section; 23. Installation part; 231. First notch;
[0036] 30. Exhaust passage; 31. Exhaust gap; 32. Exhaust flow channel; 33. Exhaust groove; 331. First exhaust groove; 332. Second exhaust groove.
[0037] 40. Rotor. Detailed Description of the Preferred Embodiments
[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0039] In the accompanying drawings, for clarity, the shapes and dimensions may be enlarged, and the same reference numerals will be used throughout all the figures to indicate the same or similar components.
[0040] In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc. are defined with respect to the structures shown in the respective drawings. In particular, "height" corresponds to the dimension from the top to the bottom, "width" corresponds to the dimension from the left to the right, and "depth" corresponds to the dimension from the front to the back. They are relative concepts and may therefore change accordingly depending on their different positions and different usage states. Therefore, these or other orientations should not be construed as restrictive terms.
[0041] Terms related to attachment, connection, etc. (e.g., "connect" and "attach") refer to the relationship in which these structures are directly or indirectly fixed or attached to each other through an intermediate structure, as well as a movable or rigid attachment or relationship, unless otherwise explicitly stated.
[0042] Embodiment 1
[0043] The embodiment of the present utility model provides a rotor mold exhaust structure, as shown in conjunction with Figures 1-6 shown, including:
[0044] A moving die core 10 and a plurality of exhaust needles 20 installed in the moving die core 10; wherein,
[0045] A plurality of overflow grooves 11 are uniformly arranged around the center at the upper part of the moving die core 10;
[0046] The exhaust needles 20 are installed at the lower part of the moving die core 10 and are corresponding to the positions of the overflow grooves 11, and one end of the exhaust needles 20 extends into the overflow grooves 11;
[0047] An exhaust passage 30 is formed between the exhaust needles 20 and the moving die core 10; the exhaust passage 30 is communicated with the overflow grooves 11 to release the internal gas during the die-casting process of the mold.
[0048] In this embodiment, during the rotor die-casting process, the air inside the mold and the gas released by the material will flow towards the overflow groove 11, and then be pushed towards the exhaust channel 30 formed between the exhaust needle 20 and the moving die insert 10, so as to be discharged from the mold, avoiding the formation of pores or other internal defects inside the rotor 40 and the rotor end ring, optimizing the aluminum casting effect of the rotor, improving the motor performance, and extending the service life of the motor; moreover, good exhaust can also ensure that the molten metal can fill the mold more smoothly, reducing the risk of insufficient filling or uneven filling, thereby improving the integrity of the casting.
[0049] In some embodiments, as shown in Figures 2-3 the exhaust needle 20 is a double-section exhaust needle to improve the gas discharge efficiency and reduce the bubbles and defects of the cast aluminum rotor 40. Preferably, the exhaust needle 20 includes segments with different diameters. In this embodiment, the exhaust needle 20 includes two segments with different diameters. When the double-section exhaust needle 20 is installed in the moving die insert 10, at least two exhaust parts can be formed to perform different exhaust volumes.
[0050] Furthermore, the exhaust needle 20 at least includes a mounting portion 23, a mating section 21, and an exhaust section 22; wherein,
[0051] the mounting portion 23 is used to form the positioning structure of the exhaust needle 20, so that the exhaust needle 20 can be quickly positioned and fixed on the moving die insert 10, facilitating disassembly and assembly;
[0052] the mating section 21 cooperates with the shaft hole 12 of the moving die insert 10 to form an exhaust gap 31;
[0053] the diameter D1 of the exhaust section 22 is smaller than the diameter D2 of the mating section 21 to form an exhaust flow channel 32.
[0054] In this embodiment, it can be understood that the exhaust gap 31 and the exhaust flow channel 32 are combined to form the exhaust channel 30; through the segmented and sectional design, it can adapt to different exhaust requirements and improve the exhaust efficiency.
[0055] Furthermore, the difference between the diameter D1 of the exhaust section 22 and the diameter D2 of the mating section 21 is 0.5 mm - 1 mm.
[0056] Furthermore, the mating section 21 includes a first mating section 211 and a second mating section 212; wherein, the first mating section 211 is arranged close to the overflow groove 11, the second mating section 212 is arranged close to the mounting portion 23, and the exhaust section 22 is located between the first mating section 211 and the second mating section 212.
[0057] In this embodiment, the first mating section 211 forms a clearance fit with the shaft hole 12 of the moving die insert 10 to help discharge the air inside the mold. The exhaust section 22 is arranged between the two mating sections to increase the exhaust volume, ensuring that the air inside the mold can be discharged smoothly and quickly, reducing the formation of air holes.
[0058] Furthermore, as shown in combination with Figure 3 and Figure 4 , an exhaust groove 33 is also formed between the second mating section 212, the mounting portion 23 and the moving die insert 10. It can be understood that in this embodiment, the exhaust gap 31, the exhaust flow channel 32 and the exhaust groove 33 are combined to form the exhaust channel 30.
[0059] Furthermore, a first notch 231 is formed on the end face of the mounting portion 23 facing the second mating section 212, and a second notch 2121 communicating with the first notch 231 is formed on the side wall of the second mating section 212. A first exhaust groove 331 is formed between the first notch 231 and the moving die insert 10, a second exhaust groove 332 is formed between the second notch 2121 and the moving die insert 10, and the second exhaust groove 332 communicates with the exhaust flow channel 32. By optimizing the structure of the exhaust needle 20, the exhaust rate and smoothness are effectively improved, and the rotor die casting effect is optimized.
[0060] In some embodiments, as shown in combination with Figure 1 , Figure 5 and Figure 6 , the number of the arranged exhaust needles 20 corresponds to the number of the overflow grooves 11. Furthermore, at least two exhaust needles 20 are correspondingly arranged below each overflow groove 11.
[0061] In some preferred embodiments, the moving die insert 10 is provided with at least four overflow grooves 11, and the exhaust needles 20 are provided with at least eight. In this embodiment, the moving die insert 10 is provided with four overflow grooves 11, the exhaust needles 20 are provided with eight, and two exhaust needles 20 are correspondingly arranged below each overflow groove 11. Furthermore, the two exhaust needles 20 are respectively arranged close to the two end portions of the overflow groove 11.
[0062] Embodiment 2
[0063] The embodiment of the present invention further provides a rotor mold, as shown in combination with Figures 1-6 , including the rotor mold exhaust structure as described in Embodiment 1.
[0064] This embodiment includes: a moving die core 10 and a plurality of exhaust pins 20 installed inside the moving die core 10; wherein, a plurality of overflow grooves 11 are evenly arranged around the center on the upper part of the moving die core 10; the exhaust pins 20 are installed on the lower part of the moving die core 10 and correspond to the positions of the overflow grooves 11, and one end of the exhaust pin 20 extends to the overflow groove 11; an exhaust passage 30 is formed between the exhaust pin 20 and the moving die core 10; the exhaust passage 30 is communicated with the overflow groove 11 to release the gas inside the die during the die-casting process.
[0065] In this embodiment, during the die-casting process of the rotor, the air inside the die and the gas released by the material will flow to the overflow groove 11, and then be pushed into the exhaust passage 30 formed between the exhaust pin 20 and the moving die core 10 to be discharged from the die, so as to avoid the formation of pores or other internal defects inside the rotor 40 and the rotor end ring, optimize the aluminum casting effect of the rotor, improve the performance of the motor, and extend the service life of the motor; moreover, good exhaust can also ensure that the molten metal can fill the die more smoothly, reduce the risk of insufficient filling or unevenness, and thus improve the integrity of the casting.
[0066] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples here.
Claims
1. A rotor mold exhaust structure, characterized in that: include: A movable mold core and a plurality of exhaust needles installed in the movable mold core; wherein, A plurality of overflow grooves are evenly arranged around the center of the upper portion of the movable mold core; The exhaust needle is installed at the lower part of the movable mold core and corresponds to the position of the overflow groove, and one end of the exhaust needle extends to the overflow groove; An exhaust channel is formed between the exhaust needle and the movable mold core; the exhaust channel is connected to the overflow groove to release the gas inside the mold during the die-casting process.
2. The rotor mold exhaust structure according to claim 1, characterized in that: The exhaust needle is a double-section exhaust needle.
3. The rotor mold exhaust structure according to claim 2, characterized in that: The exhaust needle at least includes a matching section and an exhaust section; wherein, The matching section matches with the axial hole of the movable mold core to form an exhaust gap; The exhaust section has a diameter smaller than that of the matching section, so as to form an exhaust flow channel.
4. The rotor mold exhaust structure according to claim 3, characterized in that: The difference between the diameter of the exhaust section and the diameter of the matching section is 0.5mm-1mm.
5. The rotor mold exhaust structure according to claim 3, characterized in that: The mating section includes a first mating section and a second mating section; wherein the first mating section is arranged close to the overflow groove, the second mating section is arranged close to the mounting portion of the exhaust needle, and the exhaust section is located between the first mating section and the second mating section.
6. The rotor mold exhaust structure according to claim 5, characterized in that: An exhaust groove is also formed between the second matching section, the mounting portion and the movable mold core.
7. The rotor mold exhaust structure according to claim 1, characterized in that: At least two exhaust needles are correspondingly arranged below each overflow groove.
8. The rotor mold exhaust structure according to claim 7, characterized in that: The movable mold core is provided with at least four overflow grooves, and the exhaust needles are provided with at least eight.
9. The rotor mold exhaust structure according to claim 7, characterized in that: The two exhaust needles are respectively arranged close to the two ends of the overflow groove.
10. A rotor mold, characterized in that: It comprises a rotor mold exhaust structure as described in any one of claims 1-9.