An injection mold for a high temperature component of a vacuum cleaner motor

Abstract

This utility model discloses an injection mold for high-temperature components of a vacuum cleaner motor, relating to the field of injection molds, to solve the problem in the prior art that the finished product cannot be automatically ejected when the upper mold is open. The lower mold has four corner openings on its upper surface, and an action sliding groove is formed along the lower end of the action slots inside the lower mold. An action post is fixed at the lower end of the upper mold corresponding to the upper end of the action slots. An ejector pin sliding groove is formed in a circular array on the inner end face of the lower mold core. Upper action uprights are fixed at the four corners of the upper end of the lifting plate. A second pressure spring is installed between the lower end of the action slot and the upper fixed plate along the outside of the upper action upright. A lower fixed block is fixed at the upper end of the lifting plate corresponding to the lower end of the ejector pin sliding groove. A sliding ejector pin is fixed at the upper end of the lower fixed block, extending upwards into the ejector pin sliding groove.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, specifically an injection mold for high-temperature components of vacuum cleaner motors. Background Technology

[0002] Vacuum cleaners are essential tools for modern household cleaning, and their performance and reliability directly affect user experience and lifespan. Among the core components of a vacuum cleaner, the motor is the key component that drives airflow and enables the suction function. During operation, the motor generates a significant amount of heat, especially in high-temperature components (such as the motor housing, winding supports, and air duct components). These components must withstand continuous high-temperature environments while meeting stringent requirements for structural strength, insulation performance, and dimensional accuracy. Therefore, the selection of materials and manufacturing processes for high-temperature components have a decisive impact on motor performance.

[0003] Currently, the mainstream manufacturing methods for high-temperature components of vacuum cleaner motors include metal die casting, thermosetting plastic molding, and thermoplastic injection molding. Thermoplastic injection molding technology, with its advantages of high production efficiency, excellent material utilization, and the ability to mold complex structures, is gradually becoming the mainstream direction for manufacturing high-temperature components of vacuum cleaner motors. In the field of thermoplastic injection molding, commonly used materials include engineering plastics such as polyphenylene sulfide (PPS), polybutylene terephthalate (PBT), and polyamide (PA). By adding glass fibers, mineral fillers, or flame retardants, these materials can significantly improve their heat resistance, mechanical strength, and dimensional stability, thereby meeting the long-term use requirements of high-temperature motor components within a temperature range of -40℃ to 200℃. As the core tool for realizing thermoplastic molding, the design level of the injection mold directly affects the component quality and production efficiency.

[0004] For example, the Chinese authorized patent (injection mold) with publication number CN 107571461 A includes an upper mold core, an upper mold plate, a sprue, and an upper mold fixing plate. The sprue is entirely housed within the upper mold plate and the upper mold core, and the sprue forms a flow channel. The sprue includes a mounting portion and an extension portion extending from the mounting portion. The cross-section of the mounting portion is larger than the cross-section of the extension portion. The mounting portion is housed within the upper mold plate, and the extension portion passes through the upper mold core. The flow channel passes through the mounting portion and the extension portion. The upper mold fixing plate is stacked and fixed on the upper mold plate. The upper mold fixing plate has a through hole communicating with the flow channel. The upper mold fixing plate includes a flange extending inward from the side of the through hole. The flange abuts against the mounting portion. The injection mold includes fasteners that pass through the flange and are fixedly connected to the mounting portion.

[0005] Although the aforementioned existing technology has the function of ejecting finished products, the ejection process of finished products by the ejector pins requires subsequent operations and cannot achieve automatic ejection of finished products when the upper mold is open. Utility Model Content

[0006] The purpose of this invention is to provide an injection mold for high-temperature components of a vacuum cleaner motor, in order to solve the problem mentioned in the background art that the finished product cannot be automatically ejected when the upper mold is open.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an injection mold for a high-temperature component of a vacuum cleaner motor, comprising a lower mold and an upper mold. A lower mold core is installed at the upper end of the lower mold, and an upper mold core is installed at the lower end of the upper mold. Action hole slots are formed at the four corners of the upper surface of the lower mold. An action sliding groove is formed along the lower end of the action hole slot in the lower mold. An action post is fixed at the lower end of the upper mold at a position corresponding to the upper end of the action hole slot. Ejector pin sliding grooves are arranged in a circular array on the inner end face of the lower mold core, penetrating downwards through the mold body of the lower mold. An ejection assembly is internally connected, the ejection assembly including a lifting plate, the lifting plate being located between the support plate on the lower mold and the mold body, upper action rods being fixed at the four corners of the upper end of the lifting plate, the upper end of the upper action rods extending through the action sliding groove into the action hole groove and being fixed with an upper fixed plate, a second pressure spring being installed between the lower end face of the action hole groove and the upper fixed plate along the outside of the upper action rod, a lower fixed block being fixed at the upper end of the lifting plate corresponding to the lower end of the ejector pin sliding groove, a sliding ejector pin being fixed at the upper end of the lower fixed block, the sliding ejector pin extending upward into the ejector pin sliding groove.

[0008] Preferably, a first inner insert is installed in the lower mold core, and a second inner insert is installed in the upper mold core. When the lower mold core and the upper mold core are closed, a molding cavity is formed between the first inner insert and the second inner insert.

[0009] Preferably, the inner end face of the lower mold core is provided with an ejector sealing groove along the upper end of the ejector sliding groove, and an upper sealing plate is fixed at the upper end of the sliding ejector pin, the upper sealing plate being sized to match the ejector sealing groove.

[0010] Preferably, a ring tube is fixed to the lower outer end of a plurality of sliding ejector pins, and a gas passage is fixed to the rear end of the ring tube. The sliding ejector pins, the ring tube and the gas passage are internally connected. An exhaust hole is provided at the uppermost end of the outer surface of the sliding ejector pin, and the exhaust hole is internally connected to the sliding ejector pin.

[0011] Preferably, a lower fixing plate is fixed to the upper end of the support plate on the lower mold, and lower guide rods are fixed to both sides of the upper end of the lower fixing plate. A sliding hole groove is provided on the lifting plate for the lower guide rod to slide through and extend upward through the sliding hole groove. A first pressure spring is installed between the lifting plate and the lower fixing plate along the outside of the lower guide rod.

[0012] Preferably, guide slots are provided at the four corners of the upper end face of the lower mold along the outer side of the action slot, and guide posts are fixed at the lower end of the upper mold at the corresponding positions of the upper end of the guide slot.

[0013] Preferably, the upper mold has a centrally located pouring gate at its upper end, and the pouring gate is connected to the molding cavity through a pouring channel.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) In this utility model, during the closing process of the upper and lower molds, the action column enters the action hole groove and presses the upper fixed plate and the upper action rod in the action hole groove to move downwards. The ejection assembly moves downwards as a whole, and the sliding ejector pin and the upper sealing plate move downwards, causing the upper sealing plate to enter the ejector pin sealing groove to seal the space. When the upper and lower molds separate, the second pressure spring and the first pressure spring return to their original positions, driving the ejection assembly to move upwards. The sliding ejector pin and the upper sealing plate move upwards, lifting the finished product in the molding cavity to move upwards. This realizes the automatic ejection function of the finished product. Moreover, the action of this ejection structure relies on the closing and separating process of the upper and lower molds, and does not require additional driving of the ejection structure. This solves the problem that the finished product cannot be automatically ejected when the upper mold is open.

[0016] (2) In this utility model, during the process of ejecting the finished product by the ejection structure, the exhaust hole is exposed in the molding cavity space. The gas-assisted ejection design accelerates the separation of the finished product from the insert, reduces the impact of the ejection force on the finished product, and avoids the plastic breakage at some detail positions caused by direct ejection, resulting in higher quality finished product. Attached Figure Description

[0017] Figure 1 This is a front view of an injection mold for a high-temperature component of a vacuum cleaner motor according to the present invention.

[0018] Figure 2 This is a front view of an injection mold for a high-temperature component of a vacuum cleaner motor according to the present invention.

[0019] Figure 3 This is a schematic diagram of the upper mold of an injection mold for a high-temperature component of a vacuum cleaner motor according to the present invention.

[0020] Figure 4 This is a schematic diagram of the lower mold of an injection mold for a high-temperature component of a vacuum cleaner motor according to the present invention.

[0021] Figure 5 This is a schematic diagram of the ejection assembly of an injection mold for a high-temperature component of a vacuum cleaner motor, according to the present invention.

[0022] In the diagram: 1. Lower mold; 2. Lower mold core; 3. Guide hole groove; 4. Action hole groove; 5. First inner insert; 6. Ejector pin sealing groove; 7. Ejector pin sliding groove; 8. Upper mold; 9. Upper mold core; 10. Guide pillar; 11. Action pillar; 12. Second inner insert; 13. Sprue; 14. Molding cavity; 15. Lower fixed plate; 16. Lower guide rod; 17. First pressure spring; 18. Ejection assembly; 19. Lifting plate; 20. Sliding hole groove; 21. Upper action upright; 22. Upper fixed plate; 23. Second pressure spring; 24. Lower fixed block; 25. Sliding ejector pin; 26. Upper sealing plate; 27. Annular pipe; 28. Gas passage pipe; 29. ​​Vent hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figures 1-5 This utility model provides an embodiment of an injection mold for high-temperature components of a vacuum cleaner motor, mainly composed of a lower mold 1 and an upper mold 8. The lower mold 1 serves as the basic support part of the mold, with a lower mold core 2 installed at its upper end. The lower mold core 2 provides a precise cavity structure for the lower part of the finished product. An upper mold core 9 is installed at the lower end of the upper mold 8. The upper mold core 9 cooperates with the lower mold core 2 to form a complete molding space. A first inner insert 5 is installed inside the lower mold core 2, and a second inner insert 12 is installed inside the upper mold core 9. When the lower mold core 2 and the upper mold core 9 are closed, a molding cavity 14 is formed between the first inner insert 5 and the second inner insert 12. The design and installation of the first inner insert 5 and the second inner insert 12 ensure the dimensional accuracy and surface quality of the molding cavity 14. A sprue 13 is centrally installed at the upper end of the upper mold 8, and the sprue 13 communicates with the molding cavity 14 through a sprue channel. The injection molding machine injects plastic slurry through the sprue 13, and the slurry smoothly enters the molding cavity 14 through the sprue channel.

[0025] Guide slots 3 are provided at the four corners of the upper surface of the lower mold 1, and guide posts 10 are fixed at the lower end of the upper mold 8 at the corresponding positions of the upper end of the guide slots 3. During the mold closing process, the guide posts 10 are precisely inserted into the guide slots 3, playing a guiding and positioning role, improving the accuracy and stability of mold closing, and effectively avoiding damage to the mold caused by positional deviation during the mold closing process.

[0026] The lower mold 1 has four corner openings for action holes 4, and an action sliding groove is formed along the lower end of the action holes 4 inside the lower mold 1. An action column 11 is fixed at the lower end of the upper mold 8 corresponding to the upper end of the action holes 4. An ejection assembly 18 is connected inside the lower mold 1, including a lifting plate 19, which is located between the support plate on the lower mold 1 and the mold body. Upper action rods 21 are fixed at the four corners of the upper end of the lifting plate 19. The upper end of the upper action rods 21 extends through the action sliding groove into the action holes 4 and is fixed with an upper fixed plate 22. When the drive structure on the injection molding machine closes the upper mold 8 and the lower mold 1, the action column 11 will precisely enter the action holes 4 downwards, pressing the upper fixed plate 22 and the upper action rod 21 downwards within the action holes 4. Mechanical linkage is achieved during mold closing, ensuring that each component moves according to a predetermined trajectory.

[0027] A second pressure spring 23 is installed on the outside of the upper actuating rod 21 between the lower end face of the actuating slot 4 and the upper fixed plate 22. When the actuating column 11 presses the upper fixed plate 22 and the upper actuating rod 21 downward, the second pressure spring 23 is compressed and stores elastic potential energy. When the mold opens, the second pressure spring 23 returns to its original position, providing upward force for the ejector assembly 18.

[0028] A lower fixed plate 15 is fixed to the upper end of the support plate on the lower mold 1. Lower guide rods 16 are fixed to both sides of the upper end of the lower fixed plate 15. A sliding groove 20 is provided on the lifting plate 19 for the lower guide rods 16 to slide through. The lower guide rods 16 extend upward through the sliding groove 20. A first pressure spring 17 is installed between the lifting plate 19 and the lower fixed plate 15 along the outside of the lower guide rods 16. When the ejector assembly 18 moves downward, the first pressure spring 17 is also compressed, further storing elastic potential energy. When the mold opens, the first pressure spring 17 and the second pressure spring 23 work together to provide a strong upward force for the ejector assembly 18, ensuring that the finished product can be ejected smoothly. At the same time, the cooperation between the lower guide rods 16 and the sliding groove 20 ensures the stability of the lifting plate 19 during the up and down movement, prevents it from deviating, and improves the working accuracy and reliability of the ejector assembly 18. This design of a double spring and guide structure makes the ejection process smoother.

[0029] The inner end face of the lower mold core 2 is provided with a ring array of ejector pin sliding grooves 7, which penetrate downwards through the mold body of the lower mold 1. A lower fixed block 24 is fixed at the upper end of the lifting plate 19, corresponding to the lower end of the ejector pin sliding groove 7. A sliding ejector pin 25 is fixed at the upper end of the lower fixed block 24, extending upwards into the ejector pin sliding groove 7. The ring array design of the ejector pin sliding grooves 7 ensures that the sliding ejector pin 25 is evenly stressed when ejecting the finished product, preventing deformation or damage to the finished product due to excessive localized stress.

[0030] An ejector pin sealing groove 6 is formed on the inner end face of the lower mold core 2 along the upper end of the ejector pin sliding groove 7. An upper sealing plate 26 is fixed to the upper end of the sliding ejector pin 25, and the upper sealing plate 26 matches the size of the ejector pin sealing groove 6. During the closing process of the upper mold 8 and the lower mold 1, the sliding ejector pin 25 and the upper sealing plate 26 move downward, so that the upper sealing plate 26 accurately enters the ejector pin sealing groove 6 and seals the space above. This can effectively prevent plastic slurry from entering the ejector pin sliding groove 7 during the injection process, avoid the problem of poor movement of the sliding ejector pin 25 due to slurry blockage, and ensure the normal operation of the mold and the quality of the finished product.

[0031] Multiple sliding ejector pins 25 are collectively fixed to an annular tube 27 at their lower outer ends. A gas passage pipe 28 is fixed to the rear end of the annular tube 27. The sliding ejector pins 25, the annular tube 27, and the gas passage pipe 28 are internally connected. An exhaust hole 29 is provided at the uppermost end of the outer surface of the sliding ejector pin 25, and the exhaust hole 29 is connected to the interior of the sliding ejector pin 25. Gas is pumped into the gas passage pipe 28 by a pumping structure. The gas passes through the gas passage pipe 28, the annular tube 27, and the sliding ejector pins 25, and is then discharged through the exhaust hole 29. The flow of gas loosens the connection between the finished product and the insert. This gas-assisted ejection design can effectively reduce the impact of the ejection force on the finished product and avoid breakage at detailed locations. At the same time, the flow of gas can also accelerate the separation of the finished product from the insert, improving ejection efficiency.

[0032] Working principle: The drive structure on the injection molding machine causes the upper mold 8 and the lower mold 1 to close. The injection molding machine injects plastic slurry through the sprue 13. The slurry enters the molding cavity 14 and is then cooled and formed by the cooling structure on the mold (the key point is the ejection of the finished product. The cooling structure is not specifically shown or described. A conventional cooling structure can be used for cooling).

[0033] During the closing process of the upper mold 8 and the lower mold 1, the action column 11 will enter the action hole groove 4 downwards and press the upper fixed plate 22 and the upper action rod 21 in the action hole groove 4 to move downwards. The ejector assembly 18 moves downwards as a whole, and the second pressure spring 23 and the first pressure spring 17 are compressed. The sliding ejector pin 25 and the upper sealing plate 26 move downwards, causing the upper sealing plate 26 to enter the ejector pin sealing groove 6 to seal the space above.

[0034] After cooling and molding, the drive mechanism on the injection molding machine separates the upper mold 8 and the lower mold 1. Once the pressure from the actuating column 11 is released, the second pressure spring 23 and the first pressure spring 17 return to their original positions, causing the ejector assembly 18 to move upwards. The sliding ejector pin 25 and the upper sealing plate 26 also move upwards, lifting the finished product within the molding cavity 14. Simultaneously, due to the complex structure of the external support component of the vacuum cleaner motor, to avoid direct ejection that could cause breakage at key points, air is pumped into the gas pipe 28 during the separation of the upper mold 8 and the lower mold 1. The gas passes through the gas pipe 28, the annular pipe 27, and the sliding ejector pin 25, then exits through the vent 29. The gas enters the molding cavity 14 and flows along the space below the finished product, loosening the connection between the finished product and the insert. The sliding ejector pin 25 and the upper sealing plate 26, in conjunction with the gas, complete the ejection of the finished product, removing it from the mold.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An injection mold for a high-temperature component of a vacuum cleaner motor, comprising a lower mold (1) and an upper mold (8), wherein a lower mold core (2) is installed at the upper end inside the lower mold (1), and an upper mold core (9) is installed at the lower end inside the upper mold (8), characterized in that: The lower mold (1) has four corner openings for action holes (4) on its upper surface. The lower mold (1) has an action sliding groove along the lower end of the action holes (4). The lower end of the upper mold (8) is fixed with an action column (11) at the corresponding position of the upper end of the action holes (4). The lower mold core (2) has a ring array of ejector pin sliding grooves (7) on its inner end face. The ejector pin sliding grooves (7) penetrate downward through the mold body of the lower mold (1). The lower mold (1) is fitted with an ejector assembly (18). The ejector assembly (18) includes a lifting plate (19). The lifting plate (19) is located between the support plate on the lower mold (1) and the mold body. Between, the upper lifting plate (19) is fixed with an upper action rod (21) at the four corners of the upper end. The upper end of the upper action rod (21) extends through the action sliding groove into the action hole groove (4) and is fixed with an upper fixing plate (22). A second pressure spring (23) is installed between the lower end face of the action hole groove (4) and the upper fixing plate (22) along the outside of the upper action rod (21). The upper end of the lifting plate (19) is fixed with a lower fixing block (24) corresponding to the lower end of the ejector sliding groove (7). The upper end of the lower fixing block (24) is fixed with a sliding ejector pin (25). The sliding ejector pin (25) extends upward into the ejector sliding groove (7).

2. The injection mold for a high-temperature component of a vacuum cleaner motor according to claim 1, characterized in that: The lower mold core (2) is equipped with a first inner insert (5), and the upper mold core (9) is equipped with a second inner insert (12). When the lower mold core (2) and the upper mold core (9) are closed, a molding cavity (14) is formed between the first inner insert (5) and the second inner insert (12).

3. The injection mold for a high-temperature component of a vacuum cleaner motor according to claim 2, characterized in that: The inner end face of the lower mold core (2) is provided with an ejector sealing groove (6) along the upper end of the ejector sliding groove (7). The upper end of the sliding ejector (25) is fixed with an upper sealing plate (26), and the upper sealing plate (26) matches the size of the ejector sealing groove (6).

4. The injection mold for a high-temperature component of a vacuum cleaner motor according to claim 1, characterized in that: Multiple sliding ejector pins (25) are fixed together with an annular tube (27) at their lower outer ends. A gas passage pipe (28) is fixed at the rear end of the annular tube (27). The sliding ejector pins (25), the annular tube (27) and the gas passage pipe (28) are internally connected. An exhaust hole (29) is provided at the uppermost end of the outer surface of the sliding ejector pin (25). The exhaust hole (29) is internally connected to the sliding ejector pin (25).

5. The injection mold for a high-temperature component of a vacuum cleaner motor according to claim 1, characterized in that: The lower mold (1) has a lower fixing plate (15) fixed at the upper end of the support plate. The lower fixing plate (15) has a lower guide rod (16) fixed on both sides of the upper end. The lifting plate (19) has a sliding hole groove (20) for sliding connection of the lower guide rod (16). The lower guide rod (16) extends upward through the sliding hole groove (20). A first pressure spring (17) is installed between the lifting plate (19) and the lower fixing plate (15) along the outside of the lower guide rod (16).

6. The injection mold for a high-temperature component of a vacuum cleaner motor according to claim 1, characterized in that: The lower mold (1) has guide slots (3) at the four corners of the upper end face along the outer side of the action slot (4), and the upper mold (8) has guide posts (10) fixed at the corresponding positions of the lower end and the upper end of the guide slot (3).

7. The injection mold for a high-temperature component of a vacuum cleaner motor according to claim 2, characterized in that: The upper mold (8) has a centrally located pouring port (13) at its upper end, and the pouring port (13) is connected to the molding cavity (14) through a pouring channel.

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