Deep cavity auxiliary vacuum pumping device for vacuum die casting mold

Abstract

The utility model discloses a kind of deep cavity auxiliary vacuumizing devices for vacuum die casting mould, including outer adapter, breather pipe, inner adapter, pressing plate and exhaust component, fixed mould frame is provided with fixed mould core, fixed mould core is provided with cavity, fixed mould core is provided with the installation groove for installing exhaust component, installation groove is interconnected with cavity, pressing plate is fixed with fixed mould core, exhaust component is fixed in installation groove, inner adapter is provided on pressing plate, outer adapter is provided outside fixed mould frame, inner adapter is connected with outer adapter by breather pipe. The utility model is engaged with splicing component using exhaust plate, simplifies production difficulty, is convenient for subsequent maintenance and maintenance, and can be customized according to the structure of different workpiece deep cavity area, rear end uses pressing plate, adapter and other general devices, reduce manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of molds, and in particular to a deep cavity auxiliary vacuum pumping device for vacuum die casting molds. Background Technology

[0002] The difficulty in manufacturing large die-cast parts lies primarily in their complex structures, especially the presence of numerous deep cavities, often referred to as "island" structures. Due to the unique structure of these deep cavities, they are deep and narrow structures embedded within the die-casting mold core. Traditional vacuum valves evacuate the entire die-casting mold cavity, offering limited effectiveness in evacuating these deep cavities. Consequently, during the die-casting process, air cannot escape properly from these deep cavities, preventing the molten metal from filling them effectively, leading to poor forming in these areas and resulting in a persistently high defect rate.

[0003] To address the technical challenge of traditional vacuum valves failing to cover deep cavity areas, localized auxiliary vacuuming of these areas is a highly practical solution. The main difficulty in localized vacuuming lies in the structural design of the venting channel that runs through the mold cavity. Due to the limitations of the mold structure itself, an open venting structure is not feasible. If molten metal enters the venting hole, the vacuum channel will be completely blocked, and cleaning will be extremely difficult. Only a semi-open, slit-type structure can be used, and the venting channel gap cannot be too large, ideally only 0.2mm-0.3mm. Otherwise, molten metal can easily enter, similarly blocking the venting channel. However, such a thin gap is difficult to manufacture, and even if it could be achieved, the cost would be very high. Utility Model Content

[0004] To address the shortcomings of the existing technology, the main objective of this utility model is to overcome these deficiencies and disclose a deep cavity auxiliary vacuum pumping device for vacuum die casting molds. The device includes an external adapter, a vent pipe, an internal adapter, a pressure plate, and an exhaust assembly. A fixed mold core is disposed within a fixed mold frame, and a cavity is formed on the fixed mold core. An installation groove for mounting the exhaust assembly is provided on the fixed mold core, and the installation groove communicates with the cavity. The pressure plate is fixed to the fixed mold core, thus fixing the exhaust assembly within the installation groove. An internal adapter is disposed on the pressure plate, and an external adapter is disposed on the outside of the fixed mold frame. The internal adapter and the external adapter are connected via the vent pipe.

[0005] Furthermore, the exhaust assembly includes a first exhaust plate and a second exhaust plate, which are joined together to form an exhaust channel.

[0006] Furthermore, the surfaces of the first exhaust plate and the second exhaust plate are provided with mutually cooperating wavy meshing surfaces to form a wavy exhaust channel.

[0007] Furthermore, a sealing groove is recessed around the lower surface of the pressure plate, and a sealing ring is provided in the sealing groove.

[0008] Furthermore, the pressure plate is fixed to the fixed mold core by bolts.

[0009] Furthermore, the inner adapter includes an inner base and an inner air nozzle. The inner base has a through-hole and is fixed to the pressure plate. The inner air nozzle is disposed on the inner base.

[0010] Furthermore, the inner base is fixed to the pressure plate by bolts.

[0011] Furthermore, the inner air nozzle is tightly fitted or threadedly connected to the inner base.

[0012] Furthermore, the external adapter includes an external base, a first air nozzle, and a second air nozzle. The external base is fixed on the fixed mold frame, and an air passage is provided on the external base. The first air nozzle and the second air nozzle are disposed on the external base and connected to the air passage.

[0013] Furthermore, the first air nozzle, the second air nozzle, and the external base are tightly fitted or threadedly connected.

[0014] The beneficial effects achieved by this utility model are:

[0015] This utility model adopts an interlocking assembly of exhaust plates, which simplifies production and facilitates subsequent maintenance. It can also be customized according to the structure of the deep cavity area of ​​different workpieces. The rear end uses universal devices such as pressure plates and adapters to reduce manufacturing costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the usage of a deep cavity auxiliary vacuum pumping device for vacuum die casting according to this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of a deep cavity auxiliary vacuum pumping device for vacuum die casting according to the present invention;

[0018] Figure 3 This is a schematic diagram of the exhaust assembly.

[0019] Figure 4 , Figure 5 This is a schematic diagram of the internal structure of a deep cavity auxiliary vacuum pumping device for vacuum die casting and its cooperation with the mold according to this utility model;

[0020] The attached figures are labeled as follows:

[0021] 1. External adapter, 2. Vent pipe, 3. Internal adapter, 4. Pressure plate, 5. Exhaust assembly, 8. Fixed mold frame, 9. Fixed mold core, 11. External base, 12. First air nozzle, 13. Second air nozzle, 31. Internal base, 32. Internal air nozzle, 41. Sealing ring, 51. First exhaust plate, 52. Second exhaust plate, 53. Exhaust channel. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0023] A deep cavity auxiliary vacuum pumping device for vacuum die casting molds, such as Figures 1-5 As shown, the system includes an external adapter 1, a vent pipe 2, an internal adapter 3, a pressure plate 4, and an exhaust assembly 5. A fixed mold core 9 is installed inside the fixed mold frame 8, and a cavity is formed on the fixed mold core 9. A mounting groove for installing the exhaust assembly 5 is provided on the fixed mold core 9, and the mounting groove is connected to the cavity. The exhaust assembly 5 is placed inside the mounting groove and is pressed and fixed within the mounting groove by the pressure plate 4. The internal adapter 3 is mounted on the pressure plate 4, and the external adapter 1 is located on the outside of the fixed mold frame 8. The external adapter 1 and the internal adapter 3 are connected by the vent pipe 2. In use, the external adapter 1 is connected to a vacuum machine to perform auxiliary vacuuming on the deep cavity portion of the mold.

[0024] In one embodiment, such as Figures 1-5 As shown, the exhaust assembly 5 includes a first exhaust plate 51 and a second exhaust plate 52, which are joined together to form an exhaust channel 53. During vacuuming, the gas in the cavity passes through the exhaust channel 53 and then sequentially through the inner adapter 3, the vent pipe 2, and the outer adapter 1.

[0025] In the above embodiments, such as Figures 1-5 As shown, the surfaces of the first exhaust plate 51 and the second exhaust plate 52 are provided with mutually cooperating wavy meshing surfaces to form a wavy exhaust channel 53. This effectively prevents the exhaust channel from penetrating into the molten metal.

[0026] In the above embodiments, such as Figures 1-5 As shown, the exhaust duct 53 adopts a splicing structure of the first exhaust plate 51 and the second exhaust plate 52, which simplifies the production steps and facilitates subsequent maintenance.

[0027] In one embodiment, such as Figures 1-5 As shown, a sealing groove is recessed around the lower surface of the pressure plate 4, and a sealing ring 41 is installed in the sealing groove. The sealing ring 41 is installed between the pressure plate 4 and the fixed mold core 9 to achieve an effective sealing effect.

[0028] In one embodiment, such as Figures 1-5As shown, the pressure plate 4 is fixed to the fixed mold core 9 by bolts. In this embodiment, the pressure plate 4 is provided with four connecting holes, and correspondingly, four bolts are provided. The bolts pass through the connecting holes and are fixed to the fixed mold core 9.

[0029] In one embodiment, such as Figures 1-5 As shown, the internal adapter 3 includes an internal base 31 and an internal air nozzle 32. The internal base 31 has a through-hole and is fixed to the pressure plate 4. The internal air nozzle 32 is mounted on the internal base 31. Preferably, the internal base 31 is fixed to the pressure plate 4 with bolts. Modularizing the auxiliary vacuum equipment facilitates subsequent maintenance and reduces maintenance costs. A sealing ring is provided between the internal base 31 and the pressure plate 4.

[0030] In the above embodiments, such as Figures 1-5 As shown, the inner air nozzle 32 is tightly fitted or threadedly connected to the inner base 31.

[0031] In one embodiment, such as Figures 1-5 As shown, the external adapter 1 includes an external base 11, a first air nozzle 12, and a second air nozzle 13. The external base 11 is fixed to the fixed mold frame 8, and an air passage is provided on the external base 11. The first air nozzle 12 and the second air nozzle 13 are disposed on the external base 11 and connected to the air passage. The two ends of the air pipe 2 are connected to the second air nozzle 13 and the internal air nozzle 32 to facilitate a reliable connection of the air pipe 2.

[0032] In the above embodiments, such as Figures 1-5 As shown, the structure of the first air nozzle 12, the second air nozzle 13, and the inner air nozzle 32 is a conventional structure, intended to reliably connect with the air pipe 2, and will not be described in detail here.

[0033] In one embodiment, such as Figures 1-5 As shown, the first air nozzle 12, the second air nozzle 13 and the external base 11 are tightly fitted or threaded together.

[0034] In the above embodiments, such as Figures 1-5 As shown, a groove is provided on the fixed mold frame 8 so that the vent pipe 2 is hidden and installed in the groove.

[0035] During installation, the mounting groove of this invention has a certain taper, meaning the side wall of the exhaust plate mates with the inclined inner wall of the mounting groove. After the first exhaust plate 51 and the second exhaust plate 52 are combined, they are inserted from the upper end of the mounting groove. The pressure plate 4 presses the first exhaust plate 51 and the second exhaust plate 52 downwards to stably install the exhaust plates on the fixed mold core 9. The inner base 31 is installed on the pressure plate 4. The two ends of the vent pipe are connected to the inner air nozzle 32 and the second air nozzle 13. The first air nozzle 11 is connected to a vacuum machine for vacuuming.

[0036] Among them, setting a tapered section on the inner wall of the mounting groove to fix the exhaust component 5 is only one type of fixing structure. A step structure can also be set at the lower end of the mounting groove to support and limit the exhaust component 5.

[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of implementation of the present utility model. Any modifications or equivalent substitutions to the present utility model without departing from the spirit and scope thereof shall be covered within the protection scope of the claims of the present utility model.

Claims

1. A deep cavity auxiliary vacuum pumping device for vacuum die casting molds, characterized in that, The device includes an external adapter, a vent pipe, an internal adapter, a pressure plate, and an exhaust assembly. A fixed mold core is provided inside the fixed mold frame, and a cavity is provided on the fixed mold core. An installation groove for installing the exhaust assembly is provided on the fixed mold core, and the installation groove is connected to the cavity. The pressure plate is fixed to the fixed mold core to fix the exhaust assembly in the installation groove. An internal adapter is provided on the pressure plate, and an external adapter is provided on the outside of the fixed mold frame. The internal adapter and the external adapter are connected through a vent pipe.

2. The deep cavity auxiliary vacuum pumping device for vacuum die casting molds according to claim 1, characterized in that, The exhaust assembly includes a first exhaust plate and a second exhaust plate, which are joined together to form an exhaust channel.

3. The deep cavity auxiliary vacuum pumping device for vacuum die casting mold according to claim 2, characterized in that, The surfaces of the first exhaust plate and the second exhaust plate are provided with mutually cooperating wavy meshing surfaces to form a wavy exhaust channel.

4. The deep cavity auxiliary vacuum pumping device for vacuum die casting mold according to claim 1, characterized in that, A sealing groove is recessed around the lower surface of the pressure plate, and a sealing ring is provided in the sealing groove.

5. A deep cavity auxiliary vacuum pumping device for vacuum die casting molds according to claim 1, characterized in that, The pressure plate is fixed to the fixed mold core by bolts.

6. The deep cavity auxiliary vacuum pumping device for vacuum die casting mold according to claim 1, characterized in that, The internal adapter includes an internal base and an internal air nozzle. The internal base has a through-hole and is fixed to the pressure plate. The internal air nozzle is disposed on the internal base.

7. A deep cavity auxiliary vacuum pumping device for vacuum die casting molds according to claim 6, characterized in that, The inner base is fixed to the pressure plate by bolts.

8. A deep cavity auxiliary vacuum pumping device for vacuum die casting molds according to claim 6, characterized in that, The internal air nozzle is tightly fitted or threadedly connected to the internal base.

9. A deep cavity auxiliary vacuum pumping device for vacuum die casting molds according to claim 1, characterized in that, The external adapter includes an external base, a first air nozzle, and a second air nozzle. The external base is fixed on the fixed mold frame, and an air passage is provided on the external base. The first air nozzle and the second air nozzle are provided on the external base and connected to the air passage.

10. A deep cavity auxiliary vacuum pumping device for a vacuum die-casting mold according to claim 9, characterized in that, The first air nozzle, the second air nozzle, and the external base are tightly fitted or threaded together.

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