Vacuum die casting mould for aluminium alloy parts with automatic material withdrawal

Abstract

The utility model relates to an aluminium alloy piece vacuum die -casting mould of automatic material can retreat, including mesa, lower mould, upper mould, vacuum pump and demoulding mechanism, before demoulding, start fan ware and fill the air pipe spare in the box body air, and the air pipe spare middle part is four heat pipes, and is located the bottom of push material board, and push material board is also heat conduction board, cold gas enters the air pipe spare, takes away lower mould and push material board heat, wherein the bottom of push material board is equipped with the heat dissipation board, and the air pipe spare is located the recess in the heat dissipation board bottom, can play better heat dissipation effect, wherein the box body is equipped with the refrigeration piece group, and the air cooling in the box body, the outside air enters the box body, wherein the box body is equipped with a plurality of alternately distributed flow guide vanes, makes the air stay the time long in the box body, the air cooling effect is better, reaches the temperature after demoulding, and the upper hydraulic stem drives the upper mould to move up, and starts the second hydraulic stem and drives push material board to move up, pushes out the aluminium alloy piece of forming.

Description

Technical Field

[0001] This utility model relates to the technical field of aluminum alloy die casting production equipment, specifically a vacuum die casting mold for aluminum alloy parts that can automatically unload materials. Background Technology

[0002] In the die-casting process of aluminum alloy parts with complex structures and uneven wall thicknesses, mold temperature control directly affects product quality and production efficiency. In existing technologies, after the aluminum alloy part is formed in the mold, it must be allowed to cool sufficiently to a certain strength before it can be unloaded. However, because the mold needs to maintain a high operating temperature during aluminum alloy die-casting, and the thermal conductivity of the aluminum alloy part itself is limited by its structure, the cooling rate is slow, which severely restricts production cycle time, especially in mass production.

[0003] If the material is forcibly ejected due to insufficient cooling, defects such as deformation and tearing may occur due to insufficient strength of the aluminum alloy. Therefore, we need to provide a vacuum die-casting mold for aluminum alloy that can automatically eject the material. Utility Model Content

[0004] The purpose of this invention is to provide a vacuum die-casting mold for aluminum alloy parts that can automatically unload materials. It features a demolding mechanism within the worktable, enabling rapid cooling of the aluminum alloy parts and facilitating subsequent unloading. The demolding mechanism directly and rapidly cools the aluminum alloy parts, allowing for precise directional heat dissipation of the formed workpiece. Compared to traditional natural or external cooling methods, this significantly shortens the cooling cycle. Rapid and uniform cooling avoids localized strength deficiencies caused by uneven cooling, reduces the risk of deformation and scratches during unloading, ensures product quality stability, and solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vacuum die-casting mold for aluminum alloy parts with automatic unloading capability, comprising:

[0006] The table includes a lower mold, an upper mold, a vacuum pump, and a demolding mechanism. The lower mold is fixedly installed on the top of the table. An upper hydraulic rod is fixedly installed on the top of the table via a bracket. An upper mold adapted to the lower mold is fixedly installed at the bottom of the upper hydraulic rod. The vacuum pump is installed on the surface of the bracket and is used to extract air from the lower mold. The demolding mechanism is installed inside the table and is used to unload the formed aluminum alloy parts.

[0007] The demolding mechanism includes a cooling mechanism and a pusher plate. The pusher plate is slidably installed inside the lower mold, and the cooling mechanism is installed at the bottom of the pusher plate to remove heat from the lower mold.

[0008] Preferably, a bracket is fixedly installed at the bottom of the table, and a lower hydraulic rod for pushing the pusher plate is fixedly installed inside the bracket, and a heat insulation rod is provided between the lower hydraulic rod and the pusher plate.

[0009] Preferably, the top of the upper mold is provided with a feeding interface for connection to an external feeding device.

[0010] Preferably, the cooling mechanism includes a housing, a fan, and an air pipe. The air pipe is fixed inside the lower mold and located at the bottom of the pusher plate. The air inlet end of the air pipe is equipped with a fan. The fan is installed inside the housing. The housing is fixed to the bottom of the table and has a cooling fin assembly on one side. An air inlet filter is provided on one side of the housing.

[0011] Preferably, the cooling chip group is configured as a semiconductor cooling chip group, and the cooling surface is located inside the housing, with a protective mesh installed on one side of the air intake filter.

[0012] Preferably, multiple alternating baffles are fixedly installed inside the box to extend the time air spends inside the box.

[0013] Preferably, a heat sink is fixedly installed at the bottom of the pusher plate, and the bottom of the heat sink has a groove adapted to the air pipe fitting.

[0014] Preferably, a heat insulation board is provided on one side of the box, the heat insulation board is fixed to the bottom of the table, and the box is set as an insulated box.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model features a demolding mechanism within the worktable, enabling rapid cooling of the aluminum alloy parts and facilitating subsequent unloading. The demolding mechanism directly and rapidly cools the aluminum alloy parts, allowing for precise directional heat dissipation of the formed workpiece. Compared to traditional natural cooling or external cooling methods, this significantly shortens the cooling cycle. The rapid and uniform cooling avoids localized strength deficiencies caused by uneven cooling of the aluminum alloy parts, reduces the risk of deformation and scratches during unloading, and ensures product quality stability. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a three-dimensional bottom view of the structure of this utility model;

[0019] Figure 3 This is a sectional view of the lower mold of this utility model;

[0020] Figure 4 This is an exploded perspective view of the cooling mechanism of this utility model;

[0021] Figure 5 This is a three-dimensional sectional view of the box body of this utility model.

[0022] In the diagram: 1. Tabletop; 2. Lower mold; 3. Upper mold; 4. Vacuum pump; 5. Demolding mechanism; 51. Cooling mechanism; 511. Housing; 512. Fan; 513. Air pipe fittings; 52. Push plate; 6. Support; 7. Lower hydraulic rod; 8. Heat insulation rod; 9. Feeding interface; 10. Protective net; 11. Guide plate; 12. Heat dissipation plate; 13. Groove; 14. Heat insulation plate; 15. Cooling element assembly; 16. Upper hydraulic rod. 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This utility model provides a technical solution: a vacuum die-casting mold for aluminum alloy parts with automatic unloading capability, comprising:

[0025] The table 1, lower mold 2, upper mold 3, vacuum pump 4, and demolding mechanism 5 are provided. The lower mold 2 is fixedly installed on the top of the table 1. The upper hydraulic rod 16 is fixedly installed on the top of the table 1 via a bracket 6. The upper mold 3, which is compatible with the lower mold 2, is fixedly installed at the bottom of the upper hydraulic rod 16. The vacuum pump 4 is installed on the surface of the bracket 6 to remove air from the lower mold 2. The demolding mechanism 5 is installed inside the table 1 to remove the formed aluminum alloy parts.

[0026] The demolding mechanism 5 includes a cooling mechanism 51 and a pusher plate 52. The pusher plate 52 is slidably installed inside the lower mold 2, and the cooling mechanism 51 is installed at the bottom of the pusher plate 52 to remove heat from the lower mold 2.

[0027] Specifically, a demolding mechanism 5 is installed within the table 1, which can quickly cool the aluminum alloy parts, facilitating convenient subsequent unloading. The demolding mechanism 5 directly and rapidly cools the aluminum alloy parts, allowing for precise directional heat dissipation of the formed workpiece. Compared to traditional natural cooling or external cooling methods, this significantly shortens the cooling cycle. The rapid and uniform cooling avoids localized strength deficiencies caused by uneven cooling of the aluminum alloy parts, reducing the risk of deformation and scratches during unloading and ensuring product quality stability. Integrating the demolding mechanism 5 within the table 1 achieves integrated cooling and unloading functions, reducing the space occupied by additional devices. Furthermore, the separation resistance between the workpiece and the mold cavity is reduced after cooling, making the subsequent unloading process smoother and reducing machine downtime.

[0028] A bracket 6 is fixedly installed at the bottom of the table 1. A lower hydraulic rod 7 for pushing the pusher plate 52 is fixedly installed inside the bracket 6, and a heat insulation rod 8 is provided between the lower hydraulic rod 7 and the pusher plate 52.

[0029] Furthermore, a load-bearing bracket 6 is fixedly installed at the bottom of the table 1. A lower hydraulic rod 7 is fixedly installed on the inner side of the load-bearing bracket 6 via a flange. The piston rod of the lower hydraulic rod 7 is bolted to a heat insulation rod 8. The heat insulation rod 8 is made of silicon nitride ceramic material, and its top end is bolted to the center of the bottom surface of the pusher plate 52 via a tenon and mortise structure. The ceramic heat insulation rod 8 blocks the heat from the lower mold 2 from being transferred to the hydraulic rod, solving the problem of accelerated aging of the hydraulic rod seals caused by high temperature. At the same time, the tenon and mortise connection improves the stress stability of the pusher plate 52, making the unloading process smoother.

[0030] The upper mold 3 is equipped with a feeding interface 9 at its top for connection with an external feeding device;

[0031] Specifically, the feeding interface 9 is made of 304 stainless steel, and its inner wall is provided with a spiral guide groove. The end of the interface is connected to a high-temperature resistant silicone hose via a flange to connect with the external feeding equipment. An electromagnetic flow control valve is embedded in the middle of the interface of the external equipment. The spiral guide groove can make the aluminum liquid flow more smoothly, and together with the electromagnetic flow control valve, it can achieve precise feeding, solving the problems of splashing and unstable feeding volume caused by traditional straight-inlet feeding.

[0032] The cooling mechanism 51 includes a housing 511, a fan 512, and an air pipe 513. The air pipe 513 is fixed inside the lower mold 2 and located at the bottom of the push plate 52. The air inlet end of the air pipe 513 is provided with a fan 512. The fan 512 is installed inside the housing 511. The housing 511 is fixed to the bottom of the table 1 and has a cooling chip assembly 15 on one side. An air inlet filter is provided on one side of the housing 511.

[0033] It is worth noting that the air pipe 513 of the cooling mechanism 51 is made of copper and bent into shape. Its air outlet has 8-12 air jets with a diameter of 3mm evenly distributed. The air jets are directly opposite the heat dissipation plate 12 at the bottom of the pusher plate 52. The fan 512 is an axial flow fan. Its air outlet is sealed to the air inlet of the air pipe 513 through a silicone corrugated pipe. The copper air pipe 513 has excellent thermal conductivity and high temperature resistance. Combined with the directional air jet design, the cooling air can directly act on the key heat dissipation area, which solves the problems of low heat dissipation efficiency and uneven cooling of traditional cooling devices.

[0034] The cooling chip group 15 is configured as a semiconductor cooling chip group, and the cooling surface is located inside the housing 511. A protective net 10 is installed on one side of the air intake filter.

[0035] It should be noted that the semiconductor cooling chip assembly 15 consists of 4-6 TEC1-12706 type cooling chips connected in series. The cold side of the cooling chip can be bonded with aluminum heat dissipation fins through thermal grease, and the hot side can be connected to the cooling fan outside the enclosure 511 through copper pillars. The protective mesh 10 is made of galvanized iron wire mesh and is fixed to the outside of the air intake filter with clips. The combination of multiple cooling chips 15 increases the cooling power, and the finned heat dissipation structure ensures stable cooling efficiency, solving the problem of insufficient cooling capacity of a single cooling chip.

[0036] Multiple alternating baffles 11 are fixedly installed inside the housing 511 to extend the time air spends inside the housing 511;

[0037] Among them, the guide plate 11 is made of aluminum alloy and is alternately fixed to the inner wall of the box 511. An "S"-shaped airflow channel is formed between adjacent guide plates 11, which extends the airflow path of the air entering the box 511 by more than 3 times, ensuring that the cooling air temperature entering the air pipe 513 is stable at 15-25℃, thus solving the problem of cooling air temperature fluctuation affecting the cooling effect.

[0038] A heat sink 12 is fixedly installed at the bottom of the pusher plate 52, and a groove 13 adapted to the air pipe 513 is provided at the bottom of the heat sink 12.

[0039] Specifically, the heat sink 12 is made of 6061 aluminum alloy through anodizing treatment, with a thickness of 8-12mm. The fit gap between the bottom groove 13 and the air pipe 513 is 0.5-1mm, and the inner wall of the groove 13 is provided with a thermally conductive graphite coating. The aluminum alloy heat sink 12 and the pusher plate 52 are tightly connected by bolts. The graphite coating can improve the heat exchange efficiency between the heat sink and the air pipe 513, solving the problem of heat accumulation at the bottom of the pusher plate 52 and difficulty in dissipation.

[0040] A heat insulation plate 14 is provided on one side of the box 511. The heat insulation plate 14 is fixed to the bottom of the table 1, and the box 511 is set as an insulated box.

[0041] The heat insulation board 14 is made of aerogel felt composite fiberglass cloth with a thickness of 10-15mm, and is fixed between the bottom of the tabletop 1 and the box 511 by high-temperature resistant adhesive; the heat preservation box is made of polyurethane foam board splicing, and the inner wall is covered with aluminum foil reflective layer; this structure can reduce the transfer loss of cold energy from the box 511 to the tabletop 1, and at the same time avoid stress deformation of the tabletop 1 due to sudden temperature change.

[0042] The vacuum pump 4, upper hydraulic rod 16, lower hydraulic rod 7, cooling chip group 15 and fan 512 involved in this application are all implemented using existing mature technologies and are connected to an external PLC controller and power supply. This is a conventional technical means in this field, so the specific circuit connection, control logic and working process will not be described in detail. The lower hydraulic rod 7 is a high temperature resistant hydraulic rod.

[0043] The device activates the upper hydraulic rod 16, causing the upper mold 3 to move downwards, making the upper mold 3 and lower mold 2 fit tightly together. The feeding structure is connected to an external feeding device, and a control valve is installed at the connection point. This allows the air inside the lower mold 2 and upper mold 3 to be removed by the vacuum pump 4. It does not create a complete vacuum inside the molds; a standard vacuum level is sufficient. This technology is existing, so its specific process will not be described in detail. Before demolding, the fan 512 is activated to fill the air in the housing 511 into the air pipe 513. The air pipe 513 has four heat-conducting pipes in the middle and is located at the bottom of the pusher plate 52, which is also a heat-conducting plate. Cold air enters the air pipe 513. In the process, the heat from the lower mold 2 and the push plate 52 is carried away. The bottom of the push plate 52 is provided with a heat dissipation plate 12, and the air pipe 513 is located in the groove 13 at the bottom of the heat dissipation plate 12, which can achieve better heat dissipation. The box body 511 is provided with a cooling chip group 15 to cool the air inside the box body 511. External air enters the box body 511. The box body 511 is provided with multiple alternately distributed guide plates 11, which makes the air stay in the box body 511 for a longer time and has a better cooling effect. After the demolding temperature is reached, the upper hydraulic rod 16 drives the upper mold 3 to move upward, and the second hydraulic rod is activated to drive the push plate 52 to move upward, pushing out the formed aluminum alloy part.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vacuum die-casting mold for aluminum alloy parts with automatic unloading capability, characterized in that, include: The table (1), lower mold (2), upper mold (3), vacuum pump (4) and demolding mechanism (5) are provided. The lower mold (2) is fixedly installed on the top of the table (1). The upper hydraulic rod (16) is fixedly installed on the top of the table (1) through the bracket (6). The upper mold (3) adapted to the lower mold (2) is fixedly installed at the bottom of the upper hydraulic rod (16). The vacuum pump (4) is installed on the surface of the bracket (6) and is used to extract air from the lower mold (2). The demolding mechanism (5) is installed inside the table (1) and is used to unpack the formed aluminum alloy parts. The demolding mechanism (5) includes a cooling mechanism (51) and a pusher plate (52). The pusher plate (52) is slidably installed inside the lower mold (2). The cooling mechanism (51) is installed at the bottom of the pusher plate (52) to remove heat from the lower mold (2).

2. The vacuum die-casting mold for aluminum alloy parts with automatic unloading according to claim 1, characterized in that: A bracket (6) is fixedly installed at the bottom of the table (1). A lower hydraulic rod (7) for pushing the pusher plate (52) to move is fixedly installed inside the bracket (6), and a heat insulation rod (8) is provided between the lower hydraulic rod (7) and the pusher plate (52).

3. The vacuum die-casting mold for aluminum alloy parts with automatic unloading according to claim 1, characterized in that: The upper mold (3) is provided with a feeding interface (9) at the top for connection with an external feeding device.

4. The vacuum die-casting mold for aluminum alloy parts with automatic unloading capability according to claim 1, characterized in that: The cooling mechanism (51) includes a housing (511), a fan (512), and an air pipe (513). The air pipe (513) is fixed inside the lower mold (2) and located at the bottom of the pusher plate (52). The air inlet end of the air pipe (513) is provided with a fan (512). The fan (512) is installed inside the housing (511). The housing (511) is fixed to the bottom of the table (1) and has a cooling chip group (15) on one side. The housing (511) has an air inlet filter on one side.

5. The vacuum die-casting mold for aluminum alloy parts with automatic unloading according to claim 4, characterized in that: The cooling chip group (15) is configured as a semiconductor cooling chip group, and the cooling surface is located inside the housing (511). A protective net (10) is installed on one side of the air intake filter.

6. The vacuum die-casting mold for aluminum alloy parts with automatic unloading according to claim 5, characterized in that: Multiple alternating baffles (11) are fixedly installed inside the housing (511) to extend the time air spends inside the housing (511).

7. The vacuum die-casting mold for aluminum alloy parts with automatic unloading according to claim 6, characterized in that: The bottom of the pusher plate (52) is fixedly installed with a heat sink plate (12), and the bottom of the heat sink plate (12) has a groove (13) that is compatible with the air pipe fitting (513).

8. The vacuum die-casting mold for aluminum alloy parts with automatic unloading according to claim 7, characterized in that: The box (511) is provided with a heat insulation plate (14) on one side. The heat insulation plate (14) is fixed to the bottom of the table (1), and the box (511) is set as an insulated box.

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