CN211489524U - Aluminum alloy thin wall spare water-cooling metal shell mould casting device - Google Patents

Abstract

The invention relates to the technical field of metal casting, in particular to a water-cooling metal shell type casting device for an aluminum alloy thin-wall part. Including metal shell mould, its characterized in that: the metal shell mold reduces the thermal capacity of the aluminum alloy thin-wall part by reducing the wall thickness of a casting mold, reduces the cooling speed of the aluminum alloy thin-wall part in the mold filling process, improves the mold filling capacity of molten metal in a device, rapidly cools the metal shell mold after the mold filling of the aluminum alloy thin-wall part is finished, improves the cooling speed of the molten metal in the solidification process, accelerates the solidification rate of a casting to realize rapid solidification, refines the structure of the aluminum alloy thin-wall part, and improves the mechanical property.

Description

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

【Technical field】

The utility model relates to the technical field of metal casting, in particular to a water-cooled metal shell casting device for aluminum alloy thin-walled parts.

【Background technique】

With the update of revolutionary technology and the development of industrial technology, aluminum alloy thin-walled parts are more and more widely used in the fields of automobiles, weapons, aerospace and other fields, 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 properties of thin-walled parts. Aluminum alloy has the characteristics of low organizational density, high mechanical strength and high rigidity, which can reduce the overall weight of the body and aerospace material parts and improve the overall performance of the product.

However, due to the current industrial production of aluminum alloy thin-walled parts, there are still problems such as poor metal liquid filling ability and poor product performance. Due to the high price of resin, molding sand and other molding materials used in traditional sand casting and uneven product quality, the required template must be precisely processed, so the cost of the product produced is high, and there will be some problems during the casting and filling process. The irritating smell makes the forming and production of aluminum alloy thin-walled parts very difficult, which limits the wide application of this method. However, the traditional metal shell casting also has large thermal conductivity, poor filling ability and easy generation during solidification. cracks and deformation.

【Content of utility model】

The technical problem to be solved by the utility model is to provide a reusable water-cooled metal shell mold casting device for aluminum alloy thin-walled parts in view of the deficiencies of the existing aluminum alloy thin-walled casting methods, which overcomes the problem of molten metal in traditional aluminum alloy casting. The problems of weak filling ability in the mold and poor performance of the obtained castings can 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 greatly reduce manufacturing costs.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is:

A water-cooled metal shell mold casting device for aluminum alloy thin-walled parts, comprising a metal shell mold, characterized in that: the metal shell mold includes a fixed mold base plate, a fixed mold set on the fixed mold base plate, a set of A movable mold corresponding to and matched with the stationary mold under the stationary mold, and a movable mold base plate arranged under the movable mold; A fixed mold heat dissipation cavity is provided on the side close to the fixed mold base plate; the movable mold is provided with a movable mold cavity forming part, and the movable mold cavity forming part is provided with a movable mold heat dissipation cavity on the side close to the movable mold base plate; The fixed mold cavity forming part cooperates with the movable mold cavity forming part to form a forming cavity; a plurality of fixed mold support columns for supporting the fixed mold cavity forming part are arranged between the fixed mold seat plate and the fixed mold; the A plurality of movable mold support columns for supporting the molding part of the movable mold cavity are arranged between the movable mold base plate and the movable mold.

In the above-mentioned water-cooled metal shell casting device for aluminum alloy thin-walled parts, a spacer is arranged 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, and the upper end of the cushion block is fixed to the movable mold base plate. On the lower surface of the mold, the right side of the cushion block is provided with a push rod support plate located on the movable mold base plate, and the push rod support plate is provided with a push rod fixed plate, and the space between the movable mold and the push rod fixed plate is There is an ejector pin embedded in the movable mold for ejecting the casting.

In the above water-cooled metal shell casting device for aluminum alloy thin-walled parts, reinforcing ribs are provided on both the fixed mold cavity forming part and the movable mold cavity forming part, and one end of the fixed mold support column is set on the fixed mold reinforcing rib, The other end is connected to the fixed mold base plate through the heat dissipation cavity; one end of the movable mold support column supports the movable mold reinforcement rib, and the other end is inserted into the push rod fixed plate and the push rod support plate through the heat dissipation cavity in turn, and is connected with the movable mold base plate. connect.

In the above 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 accurate mold opening and mold closing of the casting mold, and the guide mechanism is a guide post guide mechanism.

As mentioned above, the water-cooled metal shell mold casting device for aluminum alloy thin-walled parts is provided with a water-cooling system. The water-cooling system includes a fixed mold base plate and a movable mold base plate respectively. There are several cooling liquid ports on the surface, the cooling liquid ports on the movable mold base plate and the cooling liquid ports on the fixed mold base plate are evenly distributed up and down, and the upper end of the cooling liquid ports on the movable mold base plate is connected to the movable mold cavity. The distance is equal to the distance from the lower end of the cooling liquid interface on the fixed mold base plate to the molding part of the fixed mold cavity, the cooling liquid interface is connected to the high-pressure cooling water pump at one end away from the molding cavity, and the fixed mold base plate is provided with a side close to the guide mechanism. A stationary mold cooling liquid recovery hole is provided through the stationary mold base plate and communicated with the stationary mold heat dissipation cavity. The bottom of the movable mold base plate is provided with a movable mold cooling liquid recovery hole through the movable mold base plate and communicated with the movable mold heat dissipation cavity.

As mentioned above, the water-cooled metal shell casting device for aluminum alloy thin-walled parts is provided with a gating system inside the movable mold. A movable sprue cup for receiving liquid metal is arranged above the sprue, the sprue is connected with a runner, the runner is connected with an inner runner, and the other end of the inner runner is connected Molding cavity, allowing liquid metal to flow into the cavity for filling.

In the above water-cooled metal shell mold casting device for aluminum alloy thin-walled parts, the two sides of the aluminum alloy thin-walled water-cooled metal shell mold casting device are provided with locking mechanisms, and the locking mechanisms are hinged metal mold eccentric locks.

As mentioned above, the water-cooled metal shell mold casting device for aluminum alloy thin-walled parts is further provided with an exhaust system and a heating system, and the heating system is a natural gas heating system.

Compared with the prior art, the utility model has the following advantages:

1. The utility model 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, makes the molten metal fill the device completely, and greatly improves the molten metal in the device. filling capacity;

2. The utility model adopts the method of rapid water cooling 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 its mechanical properties; The pollution caused by sand core casting also improves the environment, reduces the physical harm of dust and other harmful substances to workers, and greatly reduces the labor intensity of workers;

3. The utility model 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.

【Description of drawings】

In order to illustrate the technical solutions in the embodiments of the present utility model more clearly, the accompanying drawings required to be used in the description of the embodiments will be briefly introduced below.

1 is a schematic diagram of a water-cooled metal shell casting device for aluminum alloy thin-walled parts of the present utility model;

Fig. 2 is the sectional view along the A-A direction of Fig. 1;

Fig. 3 is the sectional view along B-B direction of Fig. 1;

Fig. 4 is the front view of fixed mould;

Fig. 5 is the front view of the movable mold;

FIG. 6 is a partial enlarged view of a in FIG. 5 .

【Detailed ways】

In order to make the technical problems, technical solutions and beneficial effects solved by the present 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 the present invention, and are not intended to limit the present invention.

When ordinal numbers such as "first" and "second" are mentioned in the embodiments of the present invention, unless they express the meaning of order according to the context, it should be understood that they are only used for distinction.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

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

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

Further, the fixed mold cavity forming part 29 and the movable mold cavity forming part 30 are provided with reinforcing ribs, one end of the fixed mold support column 12 is set on the fixed mold reinforcing rib 27, and the other end is connected through the heat dissipation cavity. Fixed mold seat plate 4; one end of the movable mold support column 13 supports the movable mold reinforcement rib 28, and the other end is inserted into the push rod fixing plate 10 and the push rod support plate 9 through the heat dissipation cavity in turn and is connected to the movable mold seat plate 8. After the molten metal gradually enters the cavity, its volume and mass gradually increase, and the impact of gravity on the movable and fixed template gradually increases, and the movable template used in this device is too thin, which is easily compressed and deformed by the force. Strengthen the strength and rigidity of the movable and fixed formwork without increasing its wall thickness, so a large number of short and narrow reinforcing ribs are used to fix the shape of the moving formwork to prevent the change of the shape of the moving formwork. The connecting position of the movable template and the rounded corners eliminate the phenomenon of excessive stress concentration.

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

More specifically, the water-cooled metal shell casting device for aluminum alloy thin-walled parts is provided with a water-cooling system. The cooling liquid port 14 on the movable mold base plate 8 and the cooling liquid port 14 on the stationary mold base plate 4 are evenly distributed up and down symmetrically, and the upper end of the cooling liquid port 14 on the movable mold base plate 8 reaches the end of the movable mold cavity molding part 30. The distance is equal to the distance from the lower end of the cooling liquid port 14 on the fixed mold base plate 4 to the molding part 29 of the fixed mold cavity. The die base plate 4 is provided with a fixed die cooling liquid recovery hole 15 which penetrates through the fixed die base plate 4 and communicates with the fixed die heat dissipation cavity 31 on the side close to the guide mechanism 11. The bottom of the movable die base plate 8 is provided with a penetrating movable die base plate. 8. The moving mold cooling liquid recovery hole 33 communicated with the moving mold cooling cavity 32. When the poured metal solution fills the entire cavity through the pouring system, the high-pressure cooling water pump switch is turned on immediately, and a high-speed water flow is sprayed to rapidly cool the metal shell mold 1 to make it solidify rapidly. It flows out and recovers from the moving mold coolant recovery hole 33 .

Still further, the pouring system includes a sprue 17 arranged inside the movable mold 6, the sprue 17 adopts a serpentine sprue, and above the sprue 17 is a movable sprue for receiving metal liquid. The sprue 17 is connected to a runner 18, the runner 18 is connected to an inner runner, and the other end of the inner runner is connected to the cavity 25, so that the molten metal quickly flows into the cavity for filling type. The closed serpentine runner is placed under the movable sprue cup to slow down the flow rate of the molten metal and reduce the impact of the molten metal on the cavity. The upper part of the serpentine runner is connected to the movable sprue cup, and the lower part is connected to the runner 18 which plays the role of buffering, stabilizing the flow and blocking the slag. , the lower connection to the runner. The inner runner is the channel through which the molten metal enters the mold cavity. In connection, the inner runner has a certain distance from the end of the runner. In the height direction, the inner runner is placed in the middle of the runner, and its bottom surface is Flush with the bottom surface of the runner for easy scum and slag retention. The serpentine runner distributes the molten metal to the inner runner, and the inner gate is located at the thick wall with the riser, so that the metal liquid enters the cavity through the riser, and the inner runner is placed horizontally and directly connected to the casting, which not only can It controls the flow speed and direction of the molten metal, and shares a part of the filling of the molten metal in the cavity, so that the molten metal flows smoothly. For the convenience of manufacture, the runner is designed on the parting surface, and the parting surface is selected on the largest end face of the workpiece. The thickness of the upper wall of the runner is thinner than that of the casting, and the width of the runner 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 should be filled with a higher filling speed value during filling.

In addition, locking mechanisms 3 are provided on both sides of the aluminum alloy thin-walled water-cooled metal shell mold casting device, and the locking mechanism 3 uses an existing hinge-type metal mold eccentric lock. When the molten metal enters the casting position (parting surface) from the casting system, the locking mechanism can clamp the casting mold, prevent the molten metal from flowing out of the parting surface, and prevent the warping deformation of the metal mold to a certain extent.

Finally, the water-cooled metal shell casting device for aluminum alloy thin-walled parts is also provided with an exhaust system and a heating system. The exhaust system includes an exhaust groove, paint and a parting surface, and the exhaust effect is good. Because the research object is aluminum alloy thin-walled parts, if the exhaust sheet is used to exhaust, the cost is high, the manufacturing and processing are troublesome, and the exhaust effect is not good, and the paint itself can store gas, so a thick layer of paint can be applied on the surface of the mold. It is conducive to the flow of molten metal and mold opening and removal, and also promotes the exhaust of the mold. The parting surface between the movable die 6 and the fixed die 5 is set as a plane parting surface, and the air is exhausted in the gap between the parting surface and the guide surface (metal core, ejector pin), and the gap is controlled at 0.1-0.3mm. In order to quickly discharge the gas, a special exhaust groove is also set up. The exhaust groove is the fixed mold cooling liquid recovery hole 15 and the ejector pin hole. The ejector pin and ejector pin hole adopt clearance fit, and the gap between the two is It is larger and can be effectively exhausted, and 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, and it is often strictly controlled in the actual production process, and the temperature can be controlled within 400 °C.

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

First, put ADC-12 aluminum alloy raw materials into the furnace, set the furnace temperature to 800 ℃ for heating, always pay attention to the state of the metal in the furnace, and wait for all the aluminum alloys to melt; heat the molten metal and control its temperature at 730±2 ℃, use high-purity argon to degas the aluminum alloy melt, blowing time for 1-2 minutes; after blowing, carry out slag removal, keep the melt temperature to 720±2℃, and let stand for 10-15 minutes; then Add Al-5Ti-B for refinement treatment, let stand for 5-10 minutes; then add Al-10%Sr for metamorphic treatment, let stand for 5-10 minutes, and prepare for casting; open the gap between the fixed template and the pouring system. Heating system, keep the surrounding temperature of the movable and fixed mold and the pouring system at 400℃; to the movable mold 6, the fixed mold 5, the movable mold base plate 8, the fixed mold base plate 4, the push rod fixed plate 10, the push rod support plate 9 The surfaces that are directly exposed to high temperature, such as supporting columns, etc., are evenly sprayed with suitable coatings; the metal liquid kept at 740°C is taken out from the furnace, and the metal liquid is quickly poured into the movable sprue cup. The metal liquid first flows directly through the sprue 17, and then passes The runner 18, which has the functions of buffering, stabilizing flow and slag blocking, 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, it should be Be careful not to cut off the liquid flow, and do not overfill it, so that the metal liquid overflows; the metal liquid fills the entire cavity within 3s, and during this period, use an infrared thermometer to measure and record the mold temperature; when the mold surface temperature is close to 400 ℃, make the infrared The thermometer is always in the measurement state to ensure that the mold temperature can be monitored at all times. When the infrared thermometer shows that the mold temperature reaches 400 °C and there is no significant change, turn off the heating system at the gap between the movable and fixed molds and beside the pouring system, and immediately stop the mold temperature. Heating; open the controlled isolation valve on the balance return line on the water pump, close the discharge line, then open the pump exhaust port, open the inlet valve of the suction line, wait until the coke-cutting water at the exhaust port has no air bubbles, and then close it tightly 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, liquid level alarm), after starting the main engine, slightly open the outlet valve, establish a circulation, and observe that the motor operation is normal. If the phenomenon occurs, then slowly open the water supply valve, the water pump quickly sprays high-speed coolant, passes through the coolant interface 14, passes through the pipeline, and directly sprays the movable mold 6 and fixed mold 5; the cooling liquid sprayed by the water pump is controlled within 2s to ensure the metal shell. The temperature of the mold can quickly drop to about 260 °C, and the temperature of the metal shell mold can be measured in real time with an infrared thermometer. When the temperature of the metal shell mold reaches about 260 °C, the water pump is turned off immediately; When a small amount of droplets fall 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 protruding cylindrical portion below the lock catch 22, and the eccentric lock handle 24 is applied to the eccentric lock handle 24. With a certain force, release the lock 22, and repeat the above operation with the eccentric lock on the hinged metal mold on the other side; adjust the ejector pin 16 to move the movable mold 6, The fixed mold 5 is pushed open, and the casting is taken out smoothly; the residual scrap on the surface of the casting is cleaned with a brush, and the surface and inner cavity of the mold are cleaned, and then the water-cooled shell casting device is protected. Heating the system to make the temperature reach 100℃, evaporate all the droplets in the water-cooled shell type device, prevent corrosion, prolong the service life of the water-cooled shell type casting device; check the product quality of thin-walled parts, and use the tensile strength tester to test the product The tensile strength and elongation of the ADC-12 aluminum alloy are measured, and the Brinell hardness value of the product is measured by a cloth hardness machine to observe whether its mechanical properties meet the national standard. The Brinell hardness exceeds 90Kgf/mm2, the discarded castings are cleaned, and finally the qualified castings are put into storage.

The utility model reduces the heat capacity by reducing the thickness of the mold casting, reduces the cooling speed of the aluminum alloy thin-walled parts during the filling process, makes the molten metal fill in the device completely, and greatly improves the filling of the molten metal in the device. The utility model adopts the method of rapid water cooling 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 its mechanical properties; the obtained mechanical properties are excellent, and the rejection rate is low, avoiding The pollution caused by sand core casting improves the environment, reduces the physical harm of dust and other harmful substances to the staff, and greatly reduces the labor intensity of the workers; the utility model adopts metal shell casting, which has the advantages of repeated and efficient use. It can improve production efficiency, reduce labor costs, and greatly reduce manufacturing costs, which is of great significance to the production of aluminum alloy thin-walled parts.

The above is an embodiment 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 method, structure, etc. that are similar to or similar to the present utility model, or some technical deductions or substitutions are made under the premise of the present utility model's conception, shall be regarded as the protection scope of the present utility model.

Claims (8)

1. A water-cooled metal shell mold 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 seat plate (4), a A fixed die (5) on the fixed die base plate (4), a movable die (6) arranged below the fixed die (5) and corresponding to and matched with the fixed die (5), and a movable die (6) arranged on the movable die (6) The lower movable mold base plate (8); the fixed mold (5) is provided with a fixed mold cavity forming part (29), and the fixed mold cavity forming part (29) is close to the fixed mold base plate (4) A fixed mold heat dissipation cavity (31) is provided on the side; the movable mold (6) is provided with a movable mold cavity forming part (30), and the movable mold cavity forming part (30) is close to the side of the movable mold base plate (8). A movable mold heat dissipation cavity (32) is provided; the fixed mold cavity forming part (29) cooperates with the movable mold cavity forming part (30) to form a forming cavity (25); the fixed mold seat plate (4) A plurality of fixed mold support columns (12) for supporting the fixed mold cavity forming part (29) are arranged between the fixed mold (5) and the movable mold base plate (8) and the movable mold (6) A plurality of movable mold support columns (13) for supporting the movable mold cavity forming part (30). 2. The water-cooled metal shell mold casting device for aluminum alloy thin-walled parts according to claim 1, characterized in that: a spacer (7) is provided between the movable mold base plate (8) and the movable mold (6), so 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 on the lower surface of the movable mold (6), and a A push rod support plate (9) on the die base plate (8), a push rod fixing plate (10) is provided on the push rod support plate (9), and the movable die (6) is connected to the push rod fixing plate (10). ) is provided with a thimble (16) embedded in the movable mold (6) for ejecting the casting. 3. The water-cooled metal shell mold casting device for aluminum alloy thin-walled parts according to claim 1, wherein the fixed mold cavity forming part (29) and the movable mold cavity forming part (30) are provided with reinforcing ribs, One end of the fixed die support column (12) is set on the fixed die reinforcing rib (27), and the other end is connected to the fixed die seat plate (4) through the heat dissipation cavity; one end of the movable die support column (13) supports the movable die The other end of the reinforcing rib (28) is inserted into the push rod fixing plate (10) and the push rod supporting plate (9) in turn through the heat dissipation cavity, and is connected with the movable mold base plate (8). 4. The water-cooled metal shell mold casting device for aluminum alloy thin-walled parts according to claim 1, characterized in that: one side of the fixed mold (5) and the movable mold (6) is provided with a mold for accurately opening and closing the casting mold. A guide mechanism (11) is provided, wherein the guide mechanism (11) is a guide post guide mechanism. 5. The water-cooled metal shell mold casting device for aluminum alloy thin-walled parts according to claim 4, wherein the water-cooled metal shell mold casting device for aluminum alloy thin-walled parts is provided with a water-cooling system, and the water-cooling system includes a a plurality of cooling liquid interfaces (14) on the surfaces of the stationary die base plate (4) and the movable die base plate (8), the cooling fluid interfaces (14) on the movable die base plate (8) and the stationary die base plate (4) The cooling liquid ports (14) on the upper and lower sides are evenly distributed up and down, and the distance from the upper end of the cooling liquid port (14) on the movable mold base plate (8) to the movable mold cavity forming part (30) is the same as that on the fixed mold base plate (4). The distance from the lower end of the cooling liquid port (14) to the molding part (29) of the fixed mold cavity is equal, and the end of the cooling liquid port (14) away from the molding cavity (25) is connected to a high-pressure cooling water pump, and the fixed mold seat plate (4) A stationary mold cooling liquid recovery hole (15) is provided on the side close to the guide mechanism (11) and communicated with the stationary mold seat plate (4) and the stationary mold heat dissipation cavity (31). The bottom of the movable mold seat plate (8) is provided with There is a moving mold cooling liquid recovery hole (33) penetrating the moving mold base plate (8) and communicating with the moving mold heat dissipation cavity (32). 6. The water-cooled metal shell mold casting device for aluminum alloy thin-walled parts according to claim 4, characterized in that: a gating system is provided inside the movable mold (6), and the gating system includes a casting system arranged in the movable mold (6). ) inside the sprue (17), the sprue (17) adopts a serpentine runner, and above the sprue (17) is a movable sprue cup for receiving liquid metal, the sprue (17) A runner (18) is connected, the runner (18) is connected with an inner runner, and the other end of the inner runner is connected to the molding cavity (25), so that the liquid metal flows into the cavity for filling . 7. The water-cooled metal shell mold casting device for aluminum alloy thin-walled parts according to claim 1, characterized in that: locking mechanisms (3) are provided on both sides of the water-cooled metal shell mold casting device for aluminum alloy thin-walled parts, so that The locking mechanism (3) is a hinged metal eccentric lock. 8 . The water-cooled metal shell mold casting device for aluminum alloy thin-walled parts according to claim 1 , wherein the water-cooled metal shell mold casting device for aluminum alloy thin-walled parts is further provided with an exhaust system and a heating system. 9 . The heating system is a natural gas heating system.

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