A precision die-casting mold for a power adapter

Abstract

This invention discloses a precision die-casting mold for a power adapter, including a fixed support plate. Sliding rods are provided at the corners of the fixed support plate. An embedding groove is formed on one side of the fixed support plate, and an outer mold cylinder is embedded inside the embedding groove. A sliding support plate is provided at the end of the sliding rod away from the fixed support plate. An injection tube corresponding to the position of the outer mold cylinder is provided on one side of the sliding support plate. An inner mold cylinder is fitted onto one end of the injection tube. Injection holes are provided on both sides of the inner mold cylinder, and a cutting mechanism is provided inside the injection holes. Beneficial effect: By pushing the sliding support plate, the inner mold cylinder is inserted into the interior of the outer mold cylinder, thereby forming a fixed mold cavity between the outer and inner mold cylinders. The fixed mold cavity is sealed by a sealing plate, achieving the effect of sealing the fixed mold cavity.

Description

Technical Field

[0001] This invention patent relates to the field of die-casting mold technology, specifically to a precision die-casting mold for a power adapter. Background Technology

[0002] A power adapter is a power conversion device for small portable electronic devices and appliances. It generally consists of components such as a casing, transformer, inductor, capacitor, control IC, and PCB board. Its working principle is to convert AC input to DC output. According to the connection method, it can be divided into wall plug type and desktop type. It is commonly found in small electronic products such as mobile phones, LCD monitors, and laptops.

[0003] Mobile phone power adapters typically consist of a plastic square tube and an end cap. The plastic square tube is usually made by die casting. After injection molding and demolding, the sprue at the corners of the plastic casing needs to be manually trimmed. However, manual trimming of the sprue is inevitably incomplete, and over-shaving can easily occur when polishing the plastic casing, leading to its scrapping. At the same time, polishing the sprue greatly increases labor costs. Summary of the Invention

[0004] In response to the problems in related technologies, this invention patent proposes a precision die-casting mold for power adapters to overcome the aforementioned technical problems existing in the prior art.

[0005] Therefore, the specific technical solution adopted by this invention patent is as follows:

[0006] A precision die-casting mold for a power adapter includes a fixed support plate, with sliding rods provided at the corners of the fixed support plate. An embedding groove is provided on one side of the fixed support plate, and an outer mold cylinder is embedded inside the embedding groove. A sliding support plate is provided at the end of the sliding rod away from the fixed support plate. An injection tube corresponding to the position of the outer mold cylinder is provided on one side of the sliding support plate. An inner mold cylinder is sleeved at one end of the injection tube. Injection holes are provided on both sides of the inner mold cylinder, and a cutting mechanism is provided inside the injection holes.

[0007] Furthermore, the inner diameter of the outer mold cylinder is larger than the outer diameter of the inner mold cylinder. A positioning rod is provided at one end of the inner mold cylinder, and a positioning hole that cooperates with the positioning rod is provided inside the outer mold cylinder. A sealing plate that cooperates with the outer mold cylinder is sleeved on the outer end of the inner mold cylinder away from the positioning rod.

[0008] Furthermore, the cutting mechanism includes a rotating tube located inside the injection hole, and both ends of the rotating tube are flush with the wall of the inner mold cylinder. One end of the rotating tube located inside the inner mold cylinder is provided with an external toothed ring fixedly connected to the rotating tube, and a plurality of cutting blades arranged in a ring array are provided on one side inside the rotating tube, and adjacent cutting blades are connected to each other.

[0009] Furthermore, sliding grooves are provided on both sides of the injection-molded tube at positions corresponding to the external toothed ring, and a transmission rack that meshes with the external toothed ring is provided on the inner wall of the sliding groove, and the side wall of the sliding groove is slidably connected to the external toothed ring.

[0010] Furthermore, the inner mold cylinder is provided with vent holes at one end on both sides adjacent to the injection hole, and the two ends of the injection tube are provided with connecting holes corresponding to the vent holes.

[0011] Furthermore, a T-shaped pipe is provided inside the injection tube at a position corresponding to the injection hole, and both ends of the T-shaped pipe penetrate the injection tube, and the injection tube is hollow.

[0012] Furthermore, the vent hole is tapered with a larger diameter on the side closer to the inner mold cylinder, and the maximum diameter of the vent hole is smaller than the diameter of the injection hole, and a guide groove is provided on one side of the connecting hole.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. By pushing the sliding support plate, the inner mold cylinder is inserted into the interior of the outer mold cylinder, thereby forming a fixed mold cavity between the outer mold cylinder and the inner mold cylinder. The fixed mold cavity is then sealed by the sealing plate, achieving the effect of sealing the fixed mold cavity.

[0015] 2. When the injection tube is removed from the inner mold cylinder, the outer toothed ring is rotated, which in turn causes the rotating tube to rotate. The rotating tube causes the cutting blade to cut the sprue. When the inner mold cylinder is removed and demolded, the cut sprue is broken off. The cutting blade has a triangular cross-section, and one side of the cutting blade is flush with the side of the inner mold cylinder. The cutting blade scrapes the broken part to remove the sprue.

[0016] 3. The tapered vent holes effectively scrape away plastic from the vent hole area via the beveled edge when the inner mold cylinder is removed. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a precision die-casting mold for a power adapter according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of a precision die-casting mold for a power adapter according to an embodiment of the present invention. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the cutting mechanism of a precision die-casting mold for a power adapter according to an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the injection tube of a precision die-casting mold for a power adapter according to an embodiment of the present invention.

[0022] In the picture:

[0023] 1. Fixed support plate; 2. Sliding rod; 3. Embedded groove; 4. Outer mold cylinder; 5. Sliding support plate; 6. Injection tube; 7. Inner mold cylinder; 8. Injection hole; 9. Cutting mechanism; 10. Positioning rod; 11. Positioning hole; 12. Sealing plate; 13. Rotating tube; 14. External gear ring; 15. Cutting blade; 16. Sliding groove; 17. Transmission rack; 18. Vent hole; 19. Connecting hole; 20. T-pipe; 21. Guide groove. Detailed Implementation

[0024] To further illustrate the various embodiments, this invention patent provides accompanying drawings, which are part of the disclosure of this invention patent. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of this invention patent. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components. Example 1

[0025] For example Figures 1-4 What is shown:

[0026] This invention provides a precision die-casting mold for a power adapter, comprising a fixed support plate 1, with sliding rods 2 provided at each corner of the fixed support plate 1. An embedding groove 3 is formed on one side of the fixed support plate 1, and an outer mold cylinder 4 is embedded inside the embedding groove 3. The sliding rods 2 are mounted on the fixed support plate 1 via a bearing, and the outer mold cylinder 4 is fixedly mounted via the embedding groove 3. A sliding support plate 5 is provided at the end of the sliding rod 2 away from the fixed support plate 1, and a corresponding position is provided on one side of the sliding support plate 5 corresponding to the outer mold cylinder 4. The injection tube 6 has an inner mold cylinder 7 fitted at one end. The injection tube 6 is fixedly installed via a sliding support plate 5. The inner mold cylinder 7 is installed via the injection tube 6, and one end of the injection tube 6 is equipped with an anti-detachment structure to prevent the inner mold cylinder 7 from falling off. During use, the molding device pushes the sliding support plate 5, causing the inner mold cylinder 7 to insert into the interior of the outer mold cylinder 4, thus forming a fixed mold cavity between the outer mold cylinder 4 and the inner mold cylinder 7. The sliding support plate 5 continues to move, pushing the injection tube 6 into the interior of the inner mold cylinder 7 until it contacts the bottom of the inner mold cylinder 7, thereby facilitating the injection of the injection tube 6. The inner mold cylinder 7 is positioned opposite the injection hole 8, allowing plastic to enter the mold cavity through the injection tube 6 and the injection hole 8. After cooling, demolding is performed to achieve the purpose of die casting. Injection holes 8 are provided on both sides of the inner mold cylinder 7, and a cutting mechanism 9 is installed inside each injection hole 8. During demolding after injection, the sliding support plate 5 is pulled back by the molding device. Due to the cooled mold between the inner mold cylinder 7 and the outer mold cylinder 4, the mold has an adsorption effect on both. When the sliding support plate 5 moves, the injection tube 6 moves to one side, causing the cutting mechanism 9 to rotate, thus cutting the mold. The rotation of mechanism 9 achieves the effect of cutting and trimming the sprue, and the movement of injection tube 6 creates a negative pressure in the cavity between the inner mold cylinder 7 and injection tube 6. When injection tube 6 continues to move, the pulling force generated by the negative pressure is greater than the adsorption force of the model on the inner mold cylinder 7, thereby achieving the effect of detaching the inner mold cylinder 7. This achieves the effect of flexibly removing the inner mold cylinder 7. Furthermore, when the inner mold cylinder 7 is removed, the sprue is further trimmed by the cutting mechanism 9, thereby achieving the effect of trimming the model during demolding. This effectively eliminates the need for manual grinding, thus greatly reducing labor costs.

[0027] Detailed usage and function of this embodiment: The molding device pushes the sliding support plate 5 to insert the inner mold cylinder 7 into the outer mold cylinder 4, thereby forming a fixed mold cavity between the outer mold cylinder 4 and the inner mold cylinder 7. At this time, the sliding support plate 5 continues to move to push the injection tube 6 into the inner mold cylinder 7, so that it contacts the bottom of the inner mold cylinder 7, thereby making the injection position of the injection tube 6 opposite to the injection hole 8, so that the plastic enters the fixed mold cavity through the injection tube 6 and the injection hole 8. After cooling, demolding is performed to achieve the purpose of die casting. When demolding after injection, the molding device pulls the sliding support plate 5 back. Since there is a cooled mold between the inner mold cylinder 7 and the outer mold cylinder 4, it can attract the inner mold cylinder 7 and the outer mold cylinder 4. The effect of this is that when the sliding support plate 5 moves, the injection tube 6 moves to one side, thereby causing the cutting mechanism 9 to rotate. The rotation of the cutting mechanism 9 achieves the effect of cutting and trimming the sprue. Furthermore, the movement of the injection tube 6 creates a negative pressure in the cavity between the inner mold cylinder 7 and the injection tube 6. As the injection tube 6 continues to move, the pulling force generated by the negative pressure is greater than the adsorption force of the model on the inner mold cylinder 7, thereby achieving the effect of detaching the inner mold cylinder 7. This achieves the effect of flexibly removing the inner mold cylinder 7. Moreover, when the inner mold cylinder 7 is removed, the cutting mechanism 9 further trims the sprue, thus achieving the effect of trimming the model during demolding. This effectively reduces the need for manual grinding, thereby greatly reducing labor costs. Example 2

[0028] For example Figures 1-4 What is shown:

[0029] This invention provides a precision die-casting mold for a power adapter, wherein the inner diameter of the outer mold cylinder 4 is larger than the outer diameter of the inner mold cylinder 7, a positioning rod 10 is provided at one end of the inner mold cylinder 7, a positioning hole 11 that cooperates with the positioning rod 10 is provided inside the outer mold cylinder 4, and a sealing plate 12 that cooperates with the outer mold cylinder 4 is sleeved on the outer end of the inner mold cylinder 7 away from the positioning rod 10. In use, the inner mold cylinder 7 is inserted into the inner mold cylinder 4 by pushing the sliding support plate 5 through the casting device, thereby forming a fixed mold cavity between the outer mold cylinder 4 and the inner mold cylinder 7, and the fixed mold cavity is sealed by the setting of the sealing plate 12, thereby achieving the effect of sealing the fixed mold cavity. The cutting mechanism 9 includes a rotating tube 13 located inside the injection hole 8, with both ends of the rotating tube 13 flush with the wall of the inner mold cylinder 7. One end of the rotating tube 13 inside the inner mold cylinder 7 is provided with an external toothed ring 14 fixedly connected to the rotating tube 13. A plurality of cutting blades 15 arranged in a circular array are provided on one side of the rotating tube 13, with adjacent cutting blades 15 interconnected. When the injection tube 6 moves out of the inner mold cylinder 7, the external toothed ring 14 rotates, thereby causing the rotating tube 13 to rotate. The rotation of the rotating tube 13 causes the cutting blades 15 to cut the sprue. When the inner mold cylinder 7 is removed from the mold, the cut sprue is broken off. The cutting blade 15 has a triangular cross-section, with one side flush with the side of the inner mold cylinder 7. The cutting blade 15 scrapes the broken portion, thereby removing the sprue. The injection tube 6 has sliding grooves 16 on both sides corresponding to the external toothed ring 14. The inner wall of the sliding groove 16 is provided with a transmission rack 17 that meshes with the external toothed ring 14. The side wall of the sliding groove 16 is slidably connected to the external toothed ring 14. When the injection tube 6 moves to the bottom of the inner mold cylinder 7, the discharge port of the injection tube 6 is flush with the rotating tube 13 inside the external toothed ring 14, which facilitates the injection tube 6 to inject into the fixed mold cavity. The transmission rack is provided so that the movement of the injection tube 6 drives the external toothed ring 14 to rotate. The inner mold cylinder 7 has vent holes 18 at one end adjacent to the injection hole 8, and the injection tube 6 has connecting holes 19 at both ends corresponding to the vent holes 18. The vent holes 18 allow air to escape from the mold cavity during injection molding, and the connecting holes 19 align with the vent holes 18 when the injection tube 6 is pushed into the inner mold cylinder 7, thus allowing internal air to escape through the injection tube 6. A T-junction 20 is located inside the injection tube 6 at a position corresponding to the injection hole 8, with both ends of the T-junction 20 penetrating the injection tube 6. The injection tube 6 is hollow.The vent hole 18 is tapered and has a larger diameter on the side closer to the inner mold cylinder 7. The maximum diameter of the vent hole 18 is smaller than the diameter of the injection hole 8. A guide groove 21 is provided on one side of the connecting hole 19. When the inner mold cylinder 7 is removed, the plastic in the vent hole 18 is scraped off by the bevel. Since the diameter of the vent hole 18 is small, the plastic can be scraped off directly.

[0030] Detailed usage and function of this embodiment two: During use, the molding device pushes the sliding support plate 5 to insert the inner mold cylinder 7 into the outer mold cylinder 4, thereby forming a fixed mold cavity between the outer mold cylinder 4 and the inner mold cylinder 7. The fixed mold cavity is sealed by the sealing plate 12, achieving the effect of sealing the fixed mold cavity. When the injection tube 6 is removed from the inner mold cylinder 7, the outer toothed ring 14 rotates. The rotation of the outer toothed ring 14 causes the rotating tube 13 to rotate. The rotation of the rotating tube 13 causes the cutting blade 15 to cut the sprue. When the inner mold cylinder 7 is removed and demolded, the cut sprue is broken off. The cross-section of the cutting blade 15 is triangular, and one side of the cutting blade 15 is flush with the side of the inner mold cylinder 7. The sliding groove 16 and the outer toothed ring 14 are slidably connected. When the injection tube 6 moves to the bottom of the inner mold cylinder 7, the vent of the injection tube 6 is aligned with the rotating tube 13 inside the outer toothed ring 14, which facilitates the injection tube 6 to inject into the fixed mold cavity. The transmission tooth plate drives the outer toothed ring 14 to rotate as the injection tube 6 moves. The air inside the fixed mold cavity is discharged during injection through the vent hole 18. When the injection tube 6 is pushed into the inner mold cylinder 7, the position of the connecting hole 19 corresponds to the vent hole 18, achieving the effect of venting the internal air through the injection tube 6. When the inner mold cylinder 7 is moved out, the plastic in the vent hole 18 part is scraped off by the beveled edge through the tapered vent hole 18. Since the diameter of the vent hole 18 is small, it can achieve the effect of direct scraping.

[0031] In summary, by utilizing the above-mentioned technical solution of this invention patent, it is effectively ensured that the sprue of the model is directly removed during demolding, thereby reducing the need for manual polishing and achieving the effect of reducing labor costs.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A precision die-casting mold for a power adapter, comprising a fixed support plate (1), characterized in that, Sliding rods (2) are provided at the corners of the fixed support plate (1). An embedding groove (3) is provided on one side of the fixed support plate (1). An outer mold cylinder (4) is embedded inside the embedding groove (3). A sliding support plate (5) is provided at the end of the sliding rod (2) away from the fixed support plate (1). An injection tube (6) corresponding to the position of the outer mold cylinder (4) is provided on one side of the sliding support plate (5). An inner mold cylinder (7) is sleeved at one end of the injection tube (6). An injection hole (8) is provided on both sides of the inner mold cylinder (7). A cutting mechanism (9) is provided inside the injection hole (8). The inner diameter of the outer mold cylinder (4) is larger than the outer diameter of the inner mold cylinder (7). One end of the inner mold cylinder (7) is provided with a positioning rod (10). The interior of the outer mold cylinder (4) is provided with a positioning hole (11) that cooperates with the positioning rod (10). The outer end of the inner mold cylinder (7) away from the positioning rod (10) is fitted with a sealing plate (12) that cooperates with the outer mold cylinder (4). The cutting mechanism (9) includes a rotating tube (13) located inside the injection hole (8), and both ends of the rotating tube (13) are flush with the wall of the inner mold cylinder (7). One end of the rotating tube (13) located inside the inner mold cylinder (7) is provided with an external toothed ring (14) fixedly connected to the rotating tube (13), and a plurality of cutting blades (15) arranged in a ring array are provided on one side of the interior of the rotating tube (13), and adjacent cutting blades (15) are connected to each other. The injection tube (6) has sliding grooves (16) on both sides corresponding to the external toothed ring (14), and the inner wall of the sliding groove (16) is provided with a transmission rack (17) that meshes with the external toothed ring (14) for transmission, and the side wall of the sliding groove (16) is slidably connected to the external toothed ring (14).

2. The precision die-casting mold for a power adapter according to claim 1, characterized in that, The inner mold cylinder (7) is provided with vent holes (18) at one end on both sides adjacent to the injection hole (8), and the two ends of the injection tube (6) are provided with connecting holes (19) corresponding to the vent holes (18).

3. The precision die-casting mold for a power adapter according to claim 2, characterized in that, A tee tube (20) is provided inside the injection tube (6) at a position corresponding to the injection hole (8), and both ends of the tee tube (20) penetrate the injection tube (6). The injection tube (6) is hollow.

4. The precision die-casting mold for a power adapter according to claim 3, characterized in that, The vent hole (18) is tapered and has a larger diameter on the side closer to the inner mold cylinder (7). The maximum diameter of the vent hole (18) is smaller than the diameter of the injection hole (8). A guide groove (21) is provided on one side of the connecting hole (19).

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