A rapid prototyping mold for a 5G communication equipment enclosure

Abstract

This invention discloses a rapid prototyping mold for a 5G communication equipment enclosure, belonging to the field of mold technology. It includes a lower mold and a threaded core assembly. Guide posts are provided on both sides of the upper surface of the lower mold. The threaded core assembly includes a rotating lead screw passing through a lead screw cavity, and a threaded groove is provided on the bottom of the outer wall of the core rod. This rapid prototyping mold for the 5G communication equipment enclosure pre-threads a high-precision hexagonal nut to the bottom of the core rod, allowing the raw material to encapsulate the hexagonal nut during injection molding. After the raw material cures, the hexagonal nut is fixed to a designated location on the enclosure. This changes the position of the threaded hole in the molded enclosure from the original injection molding to an embedded nut. The capillary supports around the hexagonal nut enhance the bonding between it and the raw material, preventing the hexagonal nut from loosening. This achieves a high-precision fit between the threaded hole and the bolt, thus positively impacting the electrical performance and mechanical stability of the equipment.

Description

Technical Field

[0001] This invention relates to the field of mold technology, specifically to a rapid prototyping mold for a 5G communication equipment housing. Background Technology

[0002] Currently, 5G communication equipment enclosures are mostly manufactured using ABS, PC, or fiberglass reinforced plastic through injection molding. The mold is usually divided into an upper mold and a lower mold. The upper mold is closed with the lower mold through guide pillars, and the raw material is injected into the inner cavity after the mold is closed. After the raw material solidifies, the enclosure is formed. As a core structural component, the enclosure needs to achieve key functions such as fixing internal modules, assembling external interfaces, and sealing the whole machine through threaded connections. The accuracy and reliability of the threaded connections directly affect the electrical performance and mechanical stability of the equipment. As high-end communication equipment such as 5G base stations and radio frequency modules develop towards higher frequencies and integration, the accuracy requirements for threaded holes are becoming increasingly stringent. In the existing injection molding process, a threaded core is set in the mold, and the threaded structure is formed by cooling and solidifying the plastic melt.

[0003] The existing method of forming a threaded structure by setting a threaded core in a mold and then using the cooling and solidification of the molten plastic has the following drawbacks:

[0004] During the cooling process of plastic melt, there is a volume shrinkage rate of 0.5% to 3%, and the shrinkage difference between the thread crest (thin wall) and the root (thick wall) will aggravate the tooth profile distortion, making it difficult to control the parameters of the actual formed threaded hole within the preset value. This can lead to module loosening under vibration environment and affect the stability of signal transmission. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a rapid prototyping mold for 5G communication equipment housings, solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a rapid prototyping mold for a 5G communication equipment housing, comprising a lower mold and a threaded core assembly. Guide posts are provided on both sides of the upper surface of the lower mold, and an upper mold passes through the surface of the guide posts. The upper mold has a screw cavity, a magnet cavity, and a storage cavity sequentially formed from top to bottom around its perimeter. The threaded core assembly includes a rotating screw passing through the screw cavity, with a micro motor connected to the top of the rotating screw. A movable seat is fitted onto the outer wall of the rotating screw, and a core rod is rotatably connected to the bottom of the movable seat. A connecting post passes through the bottom end of the rotating screw. A threaded groove is provided on the bottom of the outer wall of the core rod, and a hexagonal nut is threaded onto the outer wall of the threaded groove. A capillary support is provided on the outer side of the hexagonal nut, and extension sleeves are provided on both the upper and lower surfaces of the hexagonal nut.

[0007] Furthermore, the micro motor is fixed to the top surface of the upper mold, and the micro motor and the rotating lead screw are arranged in a one-to-one manner.

[0008] Furthermore, the connecting column is slidably connected inside the rotating lead screw, and the bottom of the connecting column is fixedly connected to the inside of the core rod.

[0009] Furthermore, the threaded core assembly is located in the gap between the upper and lower molds after they are combined, and this gap is the position of the wall thickness after the box body is formed.

[0010] Furthermore, the total depth of the extension sleeve and the hexagonal nut is greater than the height of the threaded groove, and the bottom of the core rod is flush with the bottom of the extension sleeve on the lower surface of the hexagonal nut.

[0011] Furthermore, a nut positioning assembly is fixed to the top of the inner wall of the magnet cavity. The nut positioning assembly includes an electromagnet and a spring, and the bottom of the electromagnet is connected to the spring.

[0012] Furthermore, a force-bearing disc is connected to the bottom of the spring, and a lifting sleeve is fixed to the bottom of the force-bearing disc.

[0013] Furthermore, a positioning disc is fixed at the bottom of the lifting sleeve, and the bottom surface of the positioning disc contacts the top surface of the extension sleeve on the upper surface of the hexagonal nut.

[0014] Furthermore, the outer opening dimensions of the positioning disc are adapted to the inner opening dimensions of the receiving cavity, and the inner opening dimensions of the positioning disc and the lifting sleeve are adapted to the outer opening dimensions of the core rod.

[0015] Furthermore, the lifting sleeve penetrates the magnet cavity and the storage cavity, and the lifting sleeve, the force-bearing disc, and the positioning disc are elastically connected to the adsorption electromagnet via springs.

[0016] This invention provides a rapid prototyping mold for a 5G communication equipment enclosure, which has the following advantages:

[0017] 1. This rapid prototyping mold for 5G communication equipment housing uses a high-precision hexagonal nut pre-threaded to the bottom of the core rod. This allows the raw material to encapsulate the hexagonal nut during injection molding. After the raw material cures, the hexagonal nut is fixed to a designated location on the housing. This changes the position of the threaded hole in the molded housing from the original injection molding to an embedded nut. The capillary supports around the hexagonal nut enhance the bond between it and the raw material, preventing the hexagonal nut from loosening. This achieves a high-precision fit between the threaded hole and the bolt, thus positively impacting the electrical performance and mechanical stability of the equipment.

[0018] 2. The rapid prototyping mold for the 5G communication equipment enclosure improves the fitting accuracy with bolts by embedding hexagonal nuts during the injection molding process. When pre-installing the hexagonal nuts, positioning discs are used to position the embedding depth of the hexagonal nuts to ensure that the bolts can fit with each embedded hexagonal nut after the enclosure is formed. This avoids the problem of the hexagonal nuts being embedded too shallowly or too deeply, which would cause the threads to not fit and affect the stability of the module installation. Furthermore, during injection molding, the positioning discs automatically rise and retract to ensure the flatness of the sides of the enclosure after it is formed. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the lower mold and upper mold of a rapid prototyping mold for a 5G communication equipment enclosure of the present invention when they are not closed;

[0020] Figure 2 This is a schematic diagram of the structure of the lower mold and upper mold after they are closed in a rapid prototyping mold for a 5G communication equipment housing according to the present invention.

[0021] Figure 3 This is a schematic diagram of the upper mold cross-sectional structure of a rapid prototyping mold for a 5G communication equipment housing according to the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of a rapid prototyping mold for a 5G communication equipment housing after the core rod and connecting column are separated.

[0023] Figure 5 This is a schematic diagram of the lifting sleeve structure of a rapid prototyping mold for a 5G communication equipment housing according to the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of a 5G communication equipment housing rapid prototyping mold after the hexagonal nut and core rod are separated.

[0025] Figure 7 This is a schematic diagram of the overall structure of the threaded core assembly and nut positioning assembly of a rapid prototyping mold for a 5G communication equipment housing according to the present invention.

[0026] In the diagram: 1. Lower mold; 2. Guide pillar; 3. Upper mold; 4. Lead screw cavity; 5. Magnet cavity; 6. Storage cavity; 7. Threaded core assembly; 701. Rotating lead screw; 702. Micro motor; 703. Moving seat; 704. Core rod; 705. Linking column; 706. Threaded groove; 707. Hexagonal nut; 708. Capillary support; 709. Extension sleeve; 8. Nut positioning assembly; 801. Adsorption electromagnet; 802. Spring; 803. Force-bearing disc; 804. Lifting sleeve; 805. Positioning disc. Detailed Implementation

[0027] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0028] like Figures 1-7 As shown, the present invention provides a technical solution: a rapid prototyping mold for a 5G communication equipment housing, comprising a lower mold 1 and a threaded core assembly 7. Guide posts 2 are provided on both sides of the upper surface of the lower mold 1, and an upper mold 3 passes through the surface of the guide posts 2. The upper mold 3 has a screw cavity 4, a magnet cavity 5, and a storage cavity 6 sequentially formed from top to bottom around its perimeter. The threaded core assembly 7 includes a rotating screw 701 passing through the screw cavity 4, and a micro motor 702 connected to the top of the rotating screw 701. A movable seat 703 is sleeved on the outer wall of the rotating screw 701, and a core rod 704 is rotatably connected to the bottom of the movable seat 703. A connecting post 705 passes through the bottom end of the rotating screw 701. A threaded groove 706 is provided on the bottom of the outer wall of the core rod 704, and the threaded groove 706... The wall is threaded with a hexagonal nut 707. The outer side of the hexagonal nut 707 is provided with a capillary support foot 708. The upper and lower surfaces of the hexagonal nut 707 are provided with extension sleeves 709. The micro motor 702 is fixed to the top surface of the upper mold 3. The micro motor 702 and the rotating screw 701 are arranged in a one-to-one manner. The connecting column 705 is slidably connected inside the rotating screw 701. The bottom of the connecting column 705 is fixedly connected to the inside of the core rod 704. The threaded core assembly 7 is located at the gap after the upper mold 3 and the lower mold 1 are combined. This gap is the wall thickness position after the box is formed. The total depth of the extension sleeve 709 and the hexagonal nut 707 is greater than the height of the threaded groove 706. The bottom of the core rod 704 is flush with the bottom of the extension sleeve 709 on the lower surface of the hexagonal nut 707.

[0029] The specific operation is as follows: When the 5G communication equipment box is injection molded, the micro motor 702 drives the rotating screw 701 to rotate, so that the moving seat 703 carries the core rod 704 down along the surface of the rotating screw 701. The micro motor 702 has a built-in encoder to control the rotation angle of the rotating screw 701, thereby accurately controlling the descent height of the core rod 704. When the core rod 704 descends, the linkage column 705 extends from the bottom end of the rotating screw 701.

[0030] Then, the hexagonal nut 707 is screwed onto the bottom of the core rod 704. At this time, the hexagonal nut 707, together with the extension sleeves 709 on its upper and lower surfaces, completely covers the threaded groove 706.

[0031] Afterwards, the upper mold 3 is fitted onto the outer wall of the guide post 2 and slides down its surface, so that the upper mold 3 and the lower mold 1 are closed. Then, the injection material is injected into the inner cavity after the mold is closed using the injection port (not shown in the figure). The material fills the gap between the upper mold 3 and the lower mold 1, thereby wrapping the hexagonal nut 707. After the material cools and solidifies, the box body is initially formed. At this time, the solidified material wraps around the hexagonal nut 707 and limits it. With the help of the capillary support 708, the connection is enhanced, so that the hexagonal nut 707 cannot move or rotate. The hexagonal nut 707, together with the extension sleeves 709 on its upper and lower surfaces, completely covers the thread groove 706 to prevent the material from directly contacting the thread groove 706.

[0032] During demolding, the micro motor 702 rotates in the opposite direction, causing the moving seat 703 to carry the core rod 704 up along the surface of the rotating screw 701. At the same time, the rotating screw 701 drives the core rod 704 to rotate through the connecting column 705. The connecting column 705 retracts into the rotating screw 701 as the core rod 704 rises. Since the hexagonal nut 707 is solidified, the threaded groove 706 at the bottom of the core rod 704 is spirally separated from the inside of the hexagonal nut 707 by rotation. After the core rod 704 and the hexagonal nut 707 are separated, the mold is opened to separate the upper mold 3 and the lower mold 1. Then the molded box can be taken out.

[0033] Based on the above description, the present invention pre-threads a high-precision hexagonal nut 707 to the bottom of the core rod 704, allowing the raw material to wrap around the hexagonal nut 707 during injection molding of the housing. After the raw material cures, the hexagonal nut 707 is fixed in a designated position on the housing. This changes the position of the threaded hole in the molded housing from the original injection molding to an embedded nut. The capillary support 708 around the hexagonal nut 707 enhances the bond between it and the raw material, preventing the hexagonal nut 707 from loosening. This achieves a high-precision fit between the threaded hole and the bolt, thus positively impacting the electrical performance and mechanical stability of the equipment.

[0034] like Figures 1-7As shown, a nut positioning assembly 8 is fixed to the top of the inner wall of the magnet cavity 5. The nut positioning assembly 8 includes an electromagnet 801 and a spring 802. The bottom of the electromagnet 801 is connected to the spring 802. The bottom of the spring 802 is connected to a force-receiving disc 803. A lifting sleeve 804 is fixed to the bottom of the force-receiving disc 803. A positioning disc 805 is fixed to the bottom of the lifting sleeve 804. The bottom surface of the positioning disc 805 contacts the top surface of the extension sleeve 709 on the upper surface of the hexagonal nut 707. The outer opening structure size of the positioning disc 805 is adapted to the inner opening structure size of the storage cavity 6. The inner opening size of the positioning disc 805 and the lifting sleeve 804 is adapted to the outer opening size of the core rod 704. The lifting sleeve 804 penetrates the magnet cavity 5 and the storage cavity 6. The lifting sleeve 804, the force-receiving disc 803, and the positioning disc 805 are elastically connected to the electromagnet 801 through the spring 802.

[0035] The specific operation is as follows: During the injection molding process of the box, the embedment depth of the hexagonal nut 707 needs to be planned to prevent the hexagonal nut 707 from being embedded too deeply, which would prevent the bolt from reaching its position and make it difficult to complete the threaded connection. It also prevents the hexagonal nut 707 from being embedded too shallowly, which would prevent the module from being securely installed after the bolt is fully tightened. Therefore, when the hexagonal nut 707 is installed at the bottom of the core rod 704, the electromagnet 801 is kept de-energized. At this time, under the elastic action of the spring 802, the lifting sleeve 804 descends until the force-bearing disc 803 is limited by the magnet cavity 5. When the hexagonal nut 707 is threadedly installed at the bottom of the core rod 704, the top surface of the extension sleeve 709 on the upper surface of the hexagonal nut 707 contacts the bottom surface of the positioning disc 805. At this time, the descent height of the core rod 704 is controlled so that the embedment depth of the hexagonal nut 707 reaches the preset range.

[0036] Then, before the injection molding begins, the electromagnet 801 is energized to attract the force-bearing disc 803. At this time, the force-bearing disc 803 rises, which compresses the spring 802. The lifting sleeve 804 carries the positioning disc 805 up until the positioning disc 805 fits into the storage cavity 6. Then the injection molding operation begins. Since the positioning disc 805 fits into the storage cavity 6, it can ensure that the sides of the box are flush after it is formed.

[0037] Based on the above description, the present invention improves the fitting accuracy with bolts by embedding hexagonal nuts 707 during the injection molding process of the housing. When pre-installing the hexagonal nuts 707, the embedding depth of the hexagonal nuts 707 is positioned by the positioning disc 805 to ensure that the bolts can fit with each embedded hexagonal nut 707 after the housing is formed. This avoids the problem of the hexagonal nuts 707 being embedded too shallowly or too deeply, which would cause the threads to not fit and affect the stability of the module installation. Furthermore, during injection molding, the positioning disc 805 automatically rises and retracts to ensure the flatness of the sides of the housing after it is formed.

[0038] In summary, when using this rapid prototyping mold for the 5G communication equipment housing, the micro motor 702 drives the rotating screw 701 to rotate during the injection molding of the 5G communication equipment housing. This causes the moving seat 703 to carry the core rod 704 down along the surface of the rotating screw 701. The micro motor 702 has a built-in encoder to control the rotation angle of the rotating screw 701, thereby precisely controlling the descent height of the core rod 704. When the core rod 704 descends, the linkage column 705 extends from the bottom end of the rotating screw 701.

[0039] Then, the hexagonal nut 707 is screwed onto the bottom of the core rod 704. At this time, the hexagonal nut 707, together with the extension sleeves 709 on its upper and lower surfaces, completely covers the threaded groove 706. When the hexagonal nut 707 is installed at the bottom of the core rod 704, the electromagnet 801 is kept de-energized. At this time, under the elastic action of the spring 802, the lifting sleeve 804 descends until the force-bearing disc 803 is limited by the magnet cavity 5. When the hexagonal nut 707 is threaded onto the bottom of the core rod 704, the top surface of the extension sleeve 709 on the upper surface of the hexagonal nut 707 contacts the bottom surface of the positioning disc 805. At this time, it means that the embedment depth of the hexagonal nut 707 has been positioned.

[0040] Then, before the injection molding begins, the electromagnet 801 is energized to attract the force-bearing disc 803. At this time, the force-bearing disc 803 rises, causing the spring 802 to be compressed, while the lifting sleeve 804 carries the positioning disc 805 up until the positioning disc 805 fits into the storage cavity 6.

[0041] Afterwards, the upper mold 3 is fitted onto the outer wall of the guide post 2 and slides down its surface, so that the upper mold 3 and the lower mold 1 are closed. Then, the injection port is used to inject the injection material into the inner cavity after the mold is closed. The material fills the gap between the upper mold 3 and the lower mold 1, thereby wrapping the hexagonal nut 707. After the material cools and solidifies, the box is initially formed. At this time, the solidified material wraps the hexagonal nut 707 and limits it. With the help of the capillary support 708, the connection is enhanced, so that the hexagonal nut 707 cannot move or rotate. The hexagonal nut 707, together with the extension sleeves 709 on its upper and lower surfaces, completely covers the thread groove 706 to prevent the material from directly contacting the thread groove 706.

[0042] During demolding, the micro motor 702 rotates in the opposite direction, causing the moving seat 703 to carry the core rod 704 up along the surface of the rotating screw 701. At the same time, the rotating screw 701 drives the core rod 704 to rotate through the connecting column 705. The connecting column 705 retracts into the rotating screw 701 as the core rod 704 rises. Since the hexagonal nut 707 is solidified, the threaded groove 706 at the bottom of the core rod 704 is spirally separated from the inside of the hexagonal nut 707 by rotation. After the core rod 704 and the hexagonal nut 707 are separated, the mold is opened to separate the upper mold 3 and the lower mold 1. Then, the molded box can be taken out.

[0043] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A 5G communication equipment box rapid forming mold, comprising a lower mold (1) and a threaded core assembly (7), characterized in that: The upper surface of the lower mold (1) is provided with guide columns (2), and the surface of the guide column (2) is provided with an upper mold (3), the upper mold (3) is provided with a screw rod cavity (4), a magnet cavity (5) and a receiving cavity (6) from top to bottom around the inside, the threaded core assembly (7) comprises a rotating screw rod (701) penetrating in the screw rod cavity (4), and the top of the rotating screw rod (701) is connected with a micro motor (702), the outer wall of the rotating screw rod (701) is sleeved with a moving seat (703), and the bottom of the moving seat (703) is rotatably connected with a core rod (704), the bottom end of the rotating screw rod (701) is provided with a connecting column (705), the outer wall bottom of the core rod (704) is provided with a threaded groove (706), and the outer wall of the threaded groove (706) is threadedly connected with a hexagonal nut (707), the outer side of the hexagonal nut (707) is provided with a capillary foot (708), and the upper surface and the lower surface of the hexagonal nut (707) are provided with an extension sleeve (709), the inner wall top of the magnet cavity (5) is fixedly connected with a nut positioning assembly (8), the nut positioning assembly (8) comprises an adsorption electromagnet (801) and a spring (802), the bottom of the adsorption electromagnet (801) is connected with the spring (802), the bottom of the spring (802) is connected with a stress disc (803), the bottom of the stress disc (803) is fixedly connected with a lifting sleeve (804), the bottom of the lifting sleeve (804) is fixedly connected with a positioning disc (805), and the bottom surface of the positioning disc (805) is in contact with the top surface of the extension sleeve (709) on the upper surface of the hexagonal nut (707).

2. The rapid forming mold of a 5G communication equipment box according to claim 1, wherein: The micro motor (702) is fixed on the top surface of the upper mold (3), and the micro motor (702) and the rotating screw rod (701) are one-to-one arranged.

3. The rapid prototyping mold for a 5G communication device case according to claim 1, wherein: The connecting column (705) is slidably connected in the rotating screw rod (701), and the bottom of the connecting column (705) is fixedly connected with the inside of the core rod (704).

4. The rapid prototyping mold for a 5G communication device case according to claim 1, wherein: The threaded core assembly (7) is located at the gap after the combination of the upper mold (3) and the lower mold (1), and the gap is the wall thickness position after the box is formed.

5. The rapid prototyping mold for a 5G communication device case of claim 1, wherein: The total depth of the extension sleeve (709) and the hexagonal nut (707) is greater than the height of the threaded groove (706), and the bottom of the core rod (704) is flush with the bottom of the extension sleeve (709) on the lower surface of the hexagonal nut (707).

6. The rapid prototyping mold for a 5G communication device case of claim 1, wherein: The outer opening structure size of the positioning disc (805) is matched with the inner opening structure size of the receiving cavity (6), and the inner opening size of the positioning disc (805) and the lifting sleeve (804) is matched with the outer opening size of the core rod (704).

7. The rapid prototyping mold for a 5G communication device case of claim 1, wherein: The lifting sleeve (804) penetrates the magnet cavity (5) and the receiving cavity (6), and the lifting sleeve (804), the stress disc (803) and the positioning disc (805) are elastically connected with the adsorption electromagnet (801) through the spring (802).

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