A water-cooled metal shell casting device for aluminum alloy thin-walled parts

Abstract

The present invention relates to the technical field of metal casting, and in particular to a water-cooled metal shell casting device for aluminum alloy thin-walled parts. The device comprises a metal shell mold, which is characterized in that: the metal shell mold reduces the heat capacity of the mold by reducing the wall thickness of the mold, reduces the cooling rate of the aluminum alloy thin-walled parts during the filling process, and improves the filling capacity of the molten metal in the device. After the aluminum alloy thin-walled parts are filled, the metal shell mold is quickly water-cooled to increase the cooling rate of the molten metal during the solidification process, accelerate the solidification rate of the casting to achieve rapid solidification, refine the structure of the aluminum alloy thin-walled parts, and improve the mechanical properties. The present invention solves the problem of difficult filling and poor mechanical properties of aluminum alloy thin-walled parts, and the metal shell mold can be reused, thereby improving production efficiency, reducing manufacturing costs and environmental pollution.

Description

[Technical field]

[0002] The invention relates to the technical field of metal casting, and in particular to a water-cooled metal shell mold casting device for aluminum alloy thin-walled parts. [Background technology]

[0004] With the development of industrial technology, aluminum alloy thin-walled parts are increasingly used in the fields of automobiles, weapons, aerospace, etc., and the requirements for the performance of aluminum alloy thin-walled parts in production are also getting higher and higher. Modern industry generally adopts measures such as reducing the structural weight of aluminum alloys and improving the mechanical properties of aluminum alloys to improve the various properties of thin-walled parts. Aluminum alloys have the characteristics of low tissue density, high mechanical strength, and high rigidity. They can reduce the overall weight of car bodies and aerospace material parts and improve the overall performance of products.

[0005] However, in the current industrial production of aluminum alloy thin-walled parts, there are still problems such as poor filling capacity of molten metal and poor performance of cast products. Traditional sand casting uses expensive molding materials such as resin and molding sand, and the product quality is uneven. The templates required must be precisely processed, so the product cost is high. In addition, a pungent odor is generated during the pouring and filling process, making the molding and production of aluminum alloy thin-walled parts very difficult, limiting the widespread application of this method. Traditional metal shell casting also has problems such as high thermal conductivity, poor filling capacity, and easy cracking and deformation during solidification. [Summary of the invention]

[0007] The technical problem to be solved by the present invention is to provide a reusable water-cooled metal shell mold casting device for aluminum alloy thin-walled parts in view of the shortcomings of the existing aluminum alloy thin-walled parts casting method, overcome the problems of weak filling ability of molten metal in the mold and poor performance of the resulting castings in traditional aluminum alloy casting, improve the shortcomings of traditional casting devices, optimize the process production parameters in the production process of aluminum alloy thin-walled parts, improve product quality and production efficiency, and significantly reduce manufacturing costs.

[0008] The technical solution adopted by the present invention to solve the above technical problems is:

[0009] A water-cooled metal shell casting device for aluminum alloy thin-walled parts comprises a metal shell mold, wherein the metal shell mold comprises a fixed mold base plate, a fixed mold arranged on the fixed mold base plate, a movable mold arranged below the fixed mold and facing and matching with the fixed mold, and a movable mold base plate arranged below the movable mold; the fixed mold is provided with a fixed mold cavity forming part, and a fixed mold heat dissipation cavity is provided on the side of the fixed mold base plate near the fixed mold base plate; the movable mold is provided with a movable mold cavity forming part, and a movable mold heat dissipation cavity is provided on the side of the movable mold base plate near the movable mold base plate; the fixed mold cavity forming part cooperates with the movable mold cavity forming part to form a mold cavity; a plurality of fixed mold support columns for supporting the fixed mold cavity forming part are provided between the fixed mold base plate and the fixed mold; a plurality of movable mold support columns for supporting the movable mold cavity forming part are provided between the movable mold base plate and the movable mold.

[0010] As described above, in the water-cooled metal shell casting device for aluminum alloy thin-walled parts, a cushion block is provided between the movable mold base plate and the movable mold, the lower end of the cushion block is fixedly connected to the movable mold base plate, the upper end of the cushion block is fixed to the lower surface of the movable mold, a push rod support plate located on the movable mold base plate is provided on the right side of the cushion block, a push rod fixing plate is provided on the push rod support plate, and an ejector pin embedded in the movable mold for ejecting the casting is provided between the movable mold and the push rod fixing plate.

[0011] As described above, in the water-cooled metal shell mold casting device for aluminum alloy thin-walled parts, reinforcing ribs are provided on the fixed mold cavity forming part and the movable mold cavity forming part, one end of the fixed mold support column is arranged on the fixed mold reinforcement rib, and the other end passes through the heat dissipation cavity to connect to the fixed mold base plate; one end of the movable mold support column supports the movable mold reinforcement rib, and the other end passes through the heat dissipation cavity to be embedded in the push rod fixing plate and the push rod support plate in sequence and connected to the movable mold base plate.

[0012] As described above, in the water-cooled metal shell casting device for aluminum alloy thin-walled parts, one side of the fixed mold and the movable mold is provided with a guide machine for accurately opening and closing the casting mold, and the guide mechanism is a guide column guide mechanism.

[0013] As described above, the water-cooled metal shell casting device for aluminum alloy thin-walled parts is provided with a water cooling system, and the water cooling system includes a plurality of coolant interfaces respectively arranged on the surfaces of the fixed mold base plate and the movable mold base plate, the coolant interfaces on the movable mold base plate and the coolant interfaces on the fixed mold base plate are symmetrically and evenly distributed up and down, and the distance from the upper end of the coolant interface on the movable mold base plate to the molding part of the movable mold cavity is equal to the distance from the lower end of the coolant interface on the fixed mold base plate to the molding part of the fixed mold cavity, the coolant interface is connected to a high-pressure cooling water pump at one end away from the mold cavity, the fixed mold base plate is provided with a fixed mold coolant recovery hole that passes through the fixed mold base plate and is connected to the fixed mold heat dissipation cavity on the side close to the guide mechanism, and the bottom of the movable mold base plate is provided with a movable mold coolant recovery hole that passes through the movable mold base plate and is connected to the movable mold heat dissipation cavity.

[0014] As described above, the water-cooled metal shell casting device for aluminum alloy thin-walled parts has a pouring system inside the movable mold, and the pouring system includes a sprue arranged inside the movable mold, the sprue adopts a serpentine sprue, and a movable pouring cup for receiving liquid metal is provided above the sprue. The sprue is connected to a cross runner, and the cross runner is connected to an endocastor, and the other end of the endocastor is connected to a molding cavity, so that liquid metal flows into the cavity for filling.

[0015] As described above, the aluminum alloy thin-walled component water-cooled metal shell casting device has locking mechanisms on both sides thereof, and the locking mechanisms are hinged metal mold eccentric locks.

[0016] The water-cooled metal shell casting device for aluminum alloy thin-walled parts as described above is also provided with an exhaust system and a heating system, and the heating system is a natural gas heating system.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The present invention reduces the heat capacity of the mold by reducing the thickness of the mold, reduces the cooling rate of the aluminum alloy thin-walled parts during the filling process, allows the molten metal to be fully filled in the device, and greatly improves the filling capacity of the molten metal in the device;

[0019] 2. The present invention adopts a rapid water cooling method to greatly increase the solidification rate of the molten metal to achieve rapid solidification, refine the structure of the aluminum alloy thin-walled parts, and improve their mechanical properties; the obtained mechanical properties are excellent, the scrap rate is low, and the pollution caused by sand core casting is avoided. At the same time, the environment is improved, and the physical harm of harmful substances such as dust to the workers is reduced, which greatly reduces the labor intensity of the workers;

[0020] 3. The present invention adopts metal shell casting, which has the function of repeated and efficient use, improves production efficiency, reduces labor costs, greatly reduces manufacturing costs, and is of great significance to the production of aluminum alloy thin-walled parts.

Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solution in the embodiment of the present invention, the embodiment will be described below.

[0023] The drawings required for use in the description are briefly introduced.

[0024] Figure 1 It is a schematic diagram of a water-cooled metal shell casting device for aluminum alloy thin-walled parts according to the present invention;

[0025] Figure 2 for Figure 1 Section view along AA direction;

[0026] Figure 3 for Figure 1 Cross-sectional view along BB direction;

[0027] Figure 4 This is the main view of the fixed mold;

[0028] Figure 5 It is the main view of the moving mold;

[0029] Figure 6 for Figure 5 A partial enlarged view of a. [Specific implementation method]

[0031] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] When the embodiments of the present invention mention ordinal numbers such as "first" and "second", unless they do express the meaning of order according to the context, they should be understood as being merely for the purpose of distinction.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figure 1-4As shown, a water-cooled metal shell casting device for aluminum alloy thin-walled parts includes a metal shell mold 1, wherein the metal shell mold 1 includes a fixed mold base plate 4, a fixed mold 5 arranged on the fixed mold base plate 4, a movable mold 6 arranged below the fixed mold 5 and corresponding to and matching the fixed mold 5, and a movable mold base plate 8 arranged below the movable mold 6; the fixed mold 5 is provided with a fixed mold cavity forming part 29, and the fixed mold cavity forming part 29 is provided with a fixed mold heat dissipation cavity 31 on one side close to the fixed mold base plate 4; the movable mold 6 is provided with a movable mold cavity forming part 3 0, the movable mold cavity forming part 30 is provided with a forming cavity 25 on the side close to the fixed mold 5, and the movable mold cavity forming part 30 is provided with a movable mold heat dissipation cavity 32 on the side close to the movable mold seat plate 8; the fixed mold cavity forming part 29 cooperates with the movable mold cavity forming part 30 to form a cavity; a number of fixed mold support columns 12 for supporting the fixed mold cavity forming part 29 are provided between the fixed mold seat plate 4 and the fixed mold 5; a number of movable mold support columns 13 for supporting the movable mold cavity forming part 30 are provided between the movable mold seat plate 8 and the movable mold 6. The wall thickness of the movable mold 6 and the fixed mold 5 is set to 3mm, which is thinner than the wall thickness of the traditional cavity casting, and the heat capacity is relatively small, so that the pouring liquid has good fluidity in the casting, the cooling speed of the thin-walled parts during the filling process is reduced, the filling capacity of the metal liquid is enhanced, and the filling is complete during the pouring process. Because the integral type is free from processing and customization, it has good strength and rigidity and is suitable for the cavity of a simple mold. At the same time, the integral type can also use the gap between the molds to vent air. In addition, the mold has a simple structure, is a small and medium-sized mold, and has low requirements for the outer surface of thin-walled plates, so the integral cavity is chosen here.

[0035] Specifically, a cushion block 7 is provided between the movable mold base plate 8 and the movable mold 6, the lower end of the cushion block 7 is fixedly connected to the movable mold base plate 8, the upper end of the cushion block 7 is fixed to the lower surface of the movable mold 6, a push rod support plate 9 located on the movable mold base plate 8 is provided on the right side of the cushion block 7, a push rod fixing plate 10 is provided on the push rod support plate 9, and an ejector pin 16 embedded in the movable mold 6 for ejecting the casting is provided between the movable mold 6 and the push rod fixing plate 10. The ejector pin 16 that penetrates the movable mold 6 and contacts the casting is provided on the push rod fixing plate 10, so as to facilitate ejection of the casting after the casting is completed.

[0036] Furthermore, the fixed mold cavity forming part 29 and the movable mold cavity forming part 30 are both provided with reinforcing ribs. One end of the fixed mold support column 12 is provided on the fixed mold reinforcing rib 27, and the other end passes through the heat dissipation cavity to connect to the fixed mold base plate 4; one end of the movable mold support column 13 supports the movable mold reinforcing rib 28, and the other end passes through the heat dissipation cavity to be embedded in the push rod fixing plate 10 and the push rod supporting plate 9 in sequence and connected to the movable mold base plate 8. As the volume and mass of the molten metal gradually increase after gradually entering the cavity, the impact of gravity on the movable and fixed mold plates gradually increases, and the movable mold plate used in this device is too thin and is easily compressed and deformed by the action of force. In order to enhance the strength and rigidity of the movable and fixed mold plates, the wall thickness is not increased, so a large number of short and narrow reinforcing ribs are used to fix and prevent the shape of the movable mold plate from changing. The reinforcing ribs used are in the shape of rectangular columns attached to the surface of the movable mold plate, and the bottom is connected to the movable mold plate with rounded corners to eliminate the phenomenon of excessive stress concentration.

[0037] Furthermore, a guide mechanism 11 is provided on one side of the fixed mold 5 and the movable mold 6 to ensure accurate mold opening and mold closing of the casting mold. The guide mechanism 11 is a guide column guide mechanism, including a guide sleeve 19 and a guide column 20. The outer diameter of the guide sleeve 19 is equal to the installation diameter of the guide column 20. Because the guide mechanism needs to be able to withstand a certain lateral pressure and must have a positioning and guiding function, wherein the guide parts are introduced to guide the movable mold 6 and the fixed mold 5 to accurately close the mold, the mold adopts a guide column guide structure. The matching accuracy of the guide column 20 and the guide sleeve 19 should meet the requirements of the specified standards, and the gap is uniform. The gap matching method can be adopted to ensure accurate mold opening and mold closing of the casting mold. The outer diameter of the guide sleeve 19 is equal to the installation diameter of the guide column 20, so that the guide column 20 and the guide sleeve 19 fixing hole are processed together to ensure the coaxiality between them. The guide sleeve 19 is installed and fixed using a screw stop structure, and the front end of the guide sleeve 19 is provided with a chamfered corner so that the guide column 20 can smoothly enter the guide sleeve 19. The hardness of the guide sleeve 19 material is lower than that of the guide post 20 to reduce the friction between the two and prevent the guide post 20 or the guide sleeve 19 from being roughened. The guide post 20 of the guide mechanism is located around the mold parting surface, and there is a sufficient distance from the center of the zero post to the outer edge of the mold.

[0038] More specifically, the aluminum alloy thin-walled part water-cooled metal shell casting device is provided with a water cooling system, and the water cooling system includes a plurality of coolant interfaces 14 respectively arranged on the surfaces of the fixed mold base plate 4 and the movable mold base plate 8, the coolant interfaces 14 on the movable mold base plate 8 and the coolant interfaces 14 on the fixed mold base plate 4 are symmetrically and evenly distributed up and down, and the distance from the upper end of the coolant interface 14 on the movable mold base plate 8 to the movable mold cavity forming part 30 is equal to the distance from the lower end of the coolant interface 14 on the fixed mold base plate 4 to the fixed mold cavity forming part 29, the coolant interface 14 is connected to a high-pressure cooling water pump at one end away from the forming cavity 25, and a pipeline is connected thereto below, the fixed mold base plate 4 is provided with a fixed mold coolant recovery hole 15 that penetrates the fixed mold base plate 4 and is connected to the fixed mold heat dissipation cavity 31 on the side close to the guide mechanism 11, and the bottom of the movable mold base plate 8 is provided with a movable mold coolant recovery hole 33 that penetrates the movable mold base plate 8 and is connected to the movable mold heat dissipation cavity 32. When the poured metal solution fills the entire cavity through the pouring system, the high-pressure cooling water pump switch is immediately turned on to spray a high-speed water flow to quickly cool the metal shell mold 1 to make it solidify quickly, and the coolant flows out from the fixed mold coolant recovery hole 15 and the movable mold coolant recovery hole 33 for recovery.

[0039] Furthermore, the pouring system includes a sprue 17 disposed inside the movable mold 6. The sprue 17 is a serpentine sprue. A movable pouring cup for receiving the molten metal is disposed above the sprue 17. The sprue 17 is connected to a cross runner 18. The cross runner 18 is connected to an endocastor. The other end of the endocastor is connected to the cavity 25 so that the molten metal can flow rapidly into the cavity for filling. This closed serpentine sprue is placed under the movable pouring cup to slow down the flow rate of the molten metal and reduce the impact of the molten metal on the cavity. The serpentine sprue is connected to a movable pouring cup at the top and to a cross runner 18 at the bottom for buffering, stabilizing flow and blocking slag. The cross runner 18 is connected to a direct current channel at the top to facilitate the flow and filling of the molten metal, and is connected to an endocastor at the bottom. The ingates are the passages for the molten metal to enter the mold cavity. In terms of connection, the ingates are at a certain distance from the end of the runner. In terms of height, the ingates are placed in the middle of the runner, and their bottom surfaces are flush with the bottom surfaces of the runner, which is convenient for scum and slag blocking. The serpentine runner distributes the molten metal to the ingates. The ingates are located at the thick wall with risers, so that the molten metal enters the mold cavity through the risers. The ingates are placed horizontally and directly connected to the casting, which can not only control the flow speed and direction of the molten metal, but also share a part of the filling of the molten metal in the mold cavity, so that the molten metal flows smoothly. For the convenience of manufacturing, the ingates are designed on the parting surface, and the parting surface is selected on the largest end surface of the workpiece. The upper wall thickness of the ingates is thinner than that of the casting, and the width of the ingates is more than 3 times the thickness. When the wall of the casting is very thin and the surface quality requirements are high, the molten metal is filled with a higher filling speed value during filling.

[0040] In addition, the aluminum alloy thin-walled parts water-cooled metal shell casting device is provided with locking mechanisms 3 on both sides, and the locking mechanisms 3 use existing hinged metal mold eccentric locks. When the molten metal enters the casting position (parting surface) from the casting system, the locking mechanism can clamp the mold to prevent the molten metal from flowing out of the parting surface, and to a certain extent prevent the warping and deformation of the metal mold. Finally, the aluminum alloy thin-walled parts water-cooled metal shell casting device is also provided with an exhaust system and a heating system, and the exhaust system includes an exhaust groove, a coating and a parting surface, and the exhaust effect is good. Because the research object is an aluminum alloy thin-walled part, if the exhaust sheet is used for exhaust, the cost is high, the manufacturing and processing are troublesome, and the exhaust effect is poor. The coating itself can store air, so a thick layer of coating can be brushed on the mold surface, which is conducive to the flow of molten metal liquid and the opening of the mold to take out the parts, and also promotes the exhaust of the mold. The parting surface between the movable mold 6 and the fixed mold 5 is set as a plane parting surface, and the exhaust is exhausted in the gap between the parting surface and the guide surface (metal core, ejector), and this gap is controlled to be 0.1-0.3mm. In order to quickly discharge the gas, a special exhaust groove is also provided, which is the fixed mold coolant recovery hole 15 and the ejector hole. The ejector and the ejector hole are matched with a gap, and the gap between the two is large, which can effectively exhaust the gas. The installed exhaust groove also greatly increases the exhaust effect of the water-cooled metal shell casting device. The mold temperature is an important factor affecting the quality of the casting. It is often strictly controlled in the actual production process, and the temperature can be controlled within 400°C.

[0041] The water-cooled metal shell casting method of the aluminum alloy thin-walled part is as follows:

[0042] First, put the ADC-12 aluminum alloy raw material into the furnace, set the furnace temperature to 800℃ for heating, keep an eye on the metal state in the furnace, and wait for the aluminum alloy to be completely melted; keep the metal liquid insulated and control its temperature at 730±2℃, use high-purity argon gas to degas the aluminum alloy melt, and blow for 1-2 minutes; after blowing, remove the slag, keep the melt temperature at 720±2℃, and let it stand for 10-15 minutes; then add Al5TiB for refinement and let it stand for 5-10 minutes; then add Al10%Sr for metamorphism and let it stand for 5-10 minutes, and prepare for casting; start the heating system at the gap between the moving and fixed molds and the gating system, and keep the temperature around the moving and fixed molds and the gating system roughly at 400 ℃; evenly spray appropriate coatings on the surfaces directly exposed to high temperature such as the movable mold 6, the fixed mold 5, the movable mold base plate 8, the fixed mold base plate 4, the push rod fixing plate 10, the push rod support plate 9, the support column, etc.; take out the molten metal kept at 740℃ from the furnace, and quickly pour the molten metal into the movable pouring cup. The molten metal first flows directly through the straight runner 17, and then passes through the cross runner 18 with buffering, stabilizing flow and slag blocking functions, and then flows into the inner runner to control the flow rate and direction of the molten metal, and finally flows into the cavity contained in the movable mold 6 and the fixed mold 5. When pouring the molten metal, care should be taken not to interrupt the flow of the liquid, and not to pour too full to cause the molten metal to overflow; the time for the molten metal to fill the entire cavity is controlled within 3s, during which the mold temperature is measured and recorded with an infrared thermometer; when the mold surface When the surface temperature approaches 400℃, keep the infrared thermometer in the measuring state to ensure that the mold temperature can be monitored at all times. When the infrared thermometer shows that the mold temperature has reached 400℃ and does not change significantly, close the heating system at the gap between the moving and fixed molds and the casting system, and immediately stop heating the mold; open the controlled isolation valve on the balanced return liquid pipeline on the water pump, close the discharge pipeline, and then open the pump exhaust port, open the inlet valve of the suction pipeline, and wait until there are no bubbles in the coke water at the exhaust port before closing the exhaust port, open the flushing cooling water of the high-pressure water pump shaft seal, start the pump, start the respective protection systems (temperature, pressure, and liquid level alarms), start the main engine, slightly open the outlet valve, establish circulation, observe and motor operation without abnormal phenomena, and then slowly open the water supply. The water pump quickly sprays high-speed coolant through the coolant interface 14, through the pipeline, and directly sprays to the movable mold 6 and the fixed mold 5; the water pump sprays the coolant within 2 seconds to ensure that the temperature of the metal shell mold can quickly drop to about 260°C, and the temperature of the metal shell mold is measured in real time with an infrared thermometer. When the temperature of the metal shell mold reaches about 260°C, the water pump is immediately turned off; when only a small amount of liquid drops fall from the pipeline connected to the coolant interface 14 and the surface temperature of the shell mold is room temperature, the eccentric lock handle 24 can be held by hand. At this time, the eccentric lock handle 24 is still connected to the cylindrical part protruding below the lock buckle 22, and a certain force is applied to the eccentric lock handle 24 to release the lock buckle 22, and the above operation is repeated with the eccentric lock of the hinged metal mold on the other side;Adjust the ejector pin 16 to push the movable mold 6 and the fixed mold 5 apart, and take out the casting smoothly; use a brush to clean the residual waste on the surface of the casting, clean the mold surface and the inner cavity, and then protect the water-cooled shell casting device, start the heating system at the fixed mold gap and next to the pouring system to make the temperature reach 100°C, evaporate all the droplets in the water-cooled shell device, prevent rust, and extend the service life of the water-cooled shell casting device; check the quality of thin-walled products, use a tensile strength tester to test the tensile strength and elongation of the product, and then use a Brinell hardness tester to measure the Brinell hardness value of the product, observe whether its mechanical properties meet the national standards, the tensile strength of ADC-12 aluminum alloy shall not be less than 240Mpa, the elongation is greater than 1, and the Brinell hardness exceeds 90Kgf / mm2, clean up the discarded castings, and finally put the qualified castings into storage. ;

[0043] The present invention reduces the heat capacity of the mold by reducing the thickness of the mold casting, reduces the cooling rate of the aluminum alloy thin-walled parts during the filling process, allows the molten metal to be completely filled in the device, and greatly improves the filling capacity of the molten metal in the device; the present invention adopts a rapid water cooling method to greatly increase the solidification rate of the molten metal to achieve rapid solidification, refine the structure of the aluminum alloy thin-walled parts, and improve their mechanical properties; the obtained mechanical properties are excellent, the scrap rate is low, and the pollution caused by sand core casting is avoided, while the environment is improved, the physical harm of harmful substances such as dust to the workers is reduced, and the labor intensity of the workers is greatly reduced; the present invention adopts metal shell casting, which has the effect of repeated and efficient use, improves production efficiency, reduces labor costs, greatly reduces manufacturing costs, and is of great significance to the production of aluminum alloy thin-walled parts.

[0044] The above is an implementation method provided in combination with specific content, and it is not considered that the specific implementation of the present invention is limited to these descriptions. Any similarity or similarity with the method, structure, etc. of the present invention, or a number of technical deductions or replacements based on the concept of the present invention, should be regarded as the protection scope of the present invention.

Claims

1. A water-cooled metal shell casting device for aluminum alloy thin-walled parts, comprising a metal shell mold (1), characterized in that: The metal shell mold (1) comprises a fixed mold base plate (4), a fixed mold (5) arranged on the fixed mold base plate (4), a movable mold (6) arranged below the fixed mold (5) and facing and matching the fixed mold (5), and a movable mold base plate (8) arranged below the movable mold (6); the fixed mold (5) is provided with a fixed mold cavity forming portion (29), and a fixed mold heat dissipation cavity (31) is provided on a side of the fixed mold cavity forming portion (29) close to the fixed mold base plate (4); the movable mold (6) is provided with a movable mold cavity forming portion (30) A movable mold heat dissipation cavity (32) is provided on one side of the movable mold cavity forming portion (30) close to the movable mold base plate (8); the fixed mold cavity forming portion (29) cooperates with the movable mold cavity forming portion (30) to form a mold cavity (25); a plurality of fixed mold support columns (12) for supporting the fixed mold cavity forming portion (29) are provided between the fixed mold base plate (4) and the fixed mold (5); and a plurality of movable mold support columns (13) for supporting the movable mold cavity forming portion (30) are provided between the movable mold base plate (8) and the movable mold (6); A guide mechanism (11) is provided on one side of the fixed mold (5) and the movable mold (6) for accurately opening and closing the casting mold, and the guide mechanism (11) is a guide column guide mechanism; The aluminum alloy thin-walled part water-cooled metal shell casting device is provided with a water cooling system, wherein the water cooling system comprises a plurality of coolant interfaces (14) respectively provided on the surfaces of the fixed mold base plate (4) and the movable mold base plate (8), wherein the coolant interfaces (14) on the movable mold base plate (8) and the coolant interfaces (14) on the fixed mold base plate (4) are evenly distributed vertically and symmetrically, and the distance from the upper end of the coolant interfaces (14) on the movable mold base plate (8) to the movable mold cavity molding portion (30) is the same as the distance from the upper end of the coolant interfaces (14) on the fixed mold base plate (4). The distance between the lower end of the interface (14) and the fixed mold cavity molding portion (29) is equal, the end of the coolant interface (14) away from the mold cavity (25) is connected to a high-pressure cooling water pump, the fixed mold base plate (4) is provided with a fixed mold coolant recovery hole (15) on the side close to the guide mechanism (11) that penetrates the fixed mold base plate (4) and is connected to the fixed mold heat dissipation cavity (31), and the bottom of the movable mold base plate (8) is provided with a movable mold coolant recovery hole (33) that penetrates the movable mold base plate (8) and is connected to the movable mold heat dissipation cavity (32); The aluminum alloy thin-walled part water-cooled metal shell mold casting device is provided with locking mechanisms (3) on both sides, and the locking mechanisms (3) are hinged metal mold eccentric locks.

2. The water-cooled metal shell casting device for aluminum alloy thin-walled parts according to claim 1 is characterized in that: A cushion block (7) is provided between the movable mold base plate (8) and the movable mold (6), the lower end of the cushion block (7) is fixedly connected to the movable mold base plate (8), the upper end of the cushion block (7) is fixed to the lower surface of the movable mold (6), a push rod support plate (9) located on the movable mold base plate (8) is provided on the right side of the cushion block (7), a push rod fixing plate (10) is provided on the push rod support plate (9), and an ejector pin (16) embedded in the movable mold (6) for ejecting a casting is provided between the movable mold (6) and the ejector fixing plate (10).

3. The water-cooled metal shell casting device for aluminum alloy thin-walled parts according to claim 1 is characterized in that: The fixed mold cavity forming part (29) and the movable mold cavity forming part (30) are both provided with reinforcing ribs; one end of the fixed mold support column (12) is provided on the fixed mold reinforcing rib (27), and the other end passes through the heat dissipation cavity to connect to the fixed mold base plate (4); one end of the movable mold support column (13) supports the movable mold reinforcing rib (28), and the other end passes through the heat dissipation cavity to be embedded in the push rod fixing plate (10) and the push rod supporting plate (9) in sequence and is connected to the movable mold base plate (8).

4. The water-cooled metal shell casting device for aluminum alloy thin-walled parts according to claim 1, characterized in that: The movable mold (6) is provided with a pouring system inside, and the pouring system includes a sprue (17) provided inside the movable mold (6), the sprue (17) is a serpentine sprue, a movable pouring cup for receiving liquid metal is provided above the sprue (17), the sprue (17) is connected to a cross runner (18), the cross runner (18) is connected to an entrapment, and the other end of the entrapment is connected to a molding cavity (25), so that liquid metal flows into the cavity for filling.

5. The water-cooled metal shell casting device for aluminum alloy thin-walled parts according to claim 1, characterized in that: The aluminum alloy thin-walled part water-cooled metal shell casting device is also provided with an exhaust system and a heating system, and the heating system is a natural gas heating system.

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