CN115007805A - A mold forming machine for gearbox casing casting - Google Patents

Abstract

The invention discloses a mold forming machine for casting a gearbox casing, comprising a fixed base and a lower mold body, the lower mold body is spliced and mounted on the outer surface of the upper end of the fixed base, and the outer surface of the upper end of the fixed base is located on the lower mold body A module is spliced and installed in the middle of the lower mold body, the inner side of the lower mold body is a hollow structure, and the inner side of the lower mold body is provided with a circulation groove, the inner side of the fixed base is fixedly installed with a first hydraulic press, and the upper end of the first hydraulic press is fixed A lifting bracket is installed, and the upper four corners of the upper end of the lifting bracket are fixedly installed with lifting ejector rods for demoulding; through the top of the lifting ejector rod, the gearbox between the lower mold body and the module is cooled from the four corners. The shell blank is ejected to complete the demoulding operation of the gearbox shell blank. The setting of the lifting ejector rod and the lifting support plate makes the mold forming machine for casting the gearbox shell have an auxiliary demoulding structure to improve its use effect. .

Description

A mold forming machine for gearbox casing casting

technical field

The invention belongs to the technical field of gearbox shell processing, and more particularly relates to a mold forming machine for gearbox shell casting.

Background technique

The mold forming machine for gearbox casing casting is a device used in the casting process of the gearbox casing to carry out the blank shaping operation of the molten metal solution. Forming operations, with subsequent finishing, produce the gearbox housing.

Patent document CN110434311A discloses an aluminum alloy die-casting mold for a gearbox casing, including a base, a second transmission mechanism is installed inside the base, a vertical plate is fixed on the upper surface of the base, and the vertical plate is A connecting rod is fixedly connected to the right end of the two connecting rods, a sliding plate is sleeved on the outer walls of the two connecting rods, a first transmission mechanism is threadedly connected to the inside of the vertical plate, and the outer walls of the two casting mold cylinders are connected with the second transmission mechanism. Fixed connection, the left end of the mold unloading mechanism is fixedly connected with the second transmission mechanism. The aluminum alloy die-casting mold for the gearbox casing has the beneficial effect that a lot of manpower can be saved when the mold is unloaded, thereby improving the practicability of the overall mechanism. It is conducive to popularization and use. Through the coordinated use of the ejector rod, the casting mold cylinder and the base feeding port, the demand for the use of the die-casting mold is greatly improved.

The above-mentioned device has certain shortcomings in use. It does not have an auxiliary demoulding structure. When the gearbox casing is cast and processed, the cooled gearbox casing blank needs to be manually taken out by the user from the mold to reduce the speed of the mold. This improves the reclaiming efficiency of the gearbox shell blank, and has a single function. Secondly, the cooling and cooling efficiency of the above-mentioned device is low. During the gearbox shell shaping operation, it is necessary to perform auxiliary cooling operations on the gearbox shell mold in order to shorten the speed change. The time required for the cooling and forming of the box shell, the above-mentioned device itself does not have an auxiliary cooling structure, which reduces its use effect; secondly, when the gearbox shell blank is shaped and processed, the metal material is not uniformly injected, which will cause it to be formed. The latter gearbox housing blank is prone to bubble-like holes, which reduces its processing quality and reduces its processing quality.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a mold forming machine for casting a gearbox casing, which can solve the existing problems.

The problem that the present invention solves is:

1. There is no auxiliary demoulding structure. When the gearbox shell is cast and processed, the cooled gearbox shell blank needs to be manually removed from the mold by the user, which reduces the reclaiming of the gearbox shell blank. Efficiency, single function;

2. The cooling and cooling efficiency of the traditional device is low. When the gearbox casing is shaped and processed, it is necessary to perform an auxiliary cooling operation on the mold of the gearbox casing, so as to shorten the time required for the cooling and forming of the gearbox casing. The above device itself It does not have an auxiliary cooling structure, which reduces its use effect;

3. When the transmission case blank is shaped and processed, the uneven injection of metal materials will make the formed transmission case blank prone to bubble-like holes, which will reduce its processing quality and reduce its processing quality. .

The object of the present invention can be realized through the following technical solutions:

A mold forming machine for casting a gearbox casing, comprising a fixed base and a lower mold body, the lower mold body is spliced and mounted on the outer surface of the upper end of the fixed base, and the outer surface of the upper end of the fixed base is located in the middle of the lower mold body. The modules are spliced and installed, the inner side of the lower mold body is a hollow structure, and the inner side of the lower mold body is provided with a circulation groove, the inner side of the fixed base is fixedly installed with a first hydraulic press, and the upper end of the first hydraulic press is fixedly installed with a lift Supporting plate, the upper four corners of the lifting support plate are fixedly installed with lifting rods for demoulding, the outer surface of one side of the fixed base is fixedly installed with a water tank, and the upper outer surface of the water tank is fixedly installed with a water inlet pipe The water tank and the lower mold body are connected through a water inlet pipe, a fixed base plate is movably installed above the lower mold body, and an upper mold cover is fixedly installed on the outer surface of the lower end of the fixed base plate.

As a further technical solution of the present invention, a communication pipe is fixedly installed at one end of the water tank, and a heat dissipation box is fixedly sleeved in the middle of the communication pipe. A drain pipe is fixedly installed on the outer surface of one end of the communication pipe. The connection pipe and the lower mold body are connected through the drain pipe. The water in the water tank flows into the circulation tank of the lower mold body through the water inlet pipe. It is discharged from the circulation groove of the lower mold body, so that the water body circulates in the circulation groove of the lower mold body, which has a cooling effect on the gearbox shell blank in the lower mold body. In the serpentine tube, the water body in the serpentine tube is cooled by a fan to facilitate its recycling.

As a further technical solution of the present invention, a pump body is fixedly installed on the inner side of the water tank, and the whole of the drain pipe and the water inlet pipe is an L-shaped structure. The use of the pump body can pressurize the water tank, which is convenient for the water tank. Carry out drainage cooling operation.

As a further technical solution of the present invention, a lifting and pressing cover is fixedly installed on the outer surface of the upper end of the fixed base plate, positioning guide rods are fixedly installed at the four corners of the lower end of the fixed base plate, and the four corners of the upper end of the lower mold body are fixedly installed. There is a circular groove slot for use with the positioning guide rod. When the lifting and pressing cover moves down, the lifting and pressing cover drives the fixed bottom plate, so that the fixed bottom plate drives the upper mold cover to move down, thereby closing the upper part of the lower mold body. By introducing the melted metal solution between the lower mold body and the module, after the metal solution is cooled, the gearbox housing blank is formed, and the lifting and lowering pressure can be improved by using the docking between the positioning guide rod and the circular groove slot. Precision when the lid is closed.

As a further technical solution of the present invention, a fixed top cover is installed above the lifting and pressing cover, the fixed top cover and the fixed base are butted and fixed by four sets of vertical rods, and the four corners of the lifting and pressing cover are There is a round hole, the vertical rod runs through the round hole, and the roller used for the vertical rod is movably installed in the round hole. The setting of the roller can reduce the friction between the lifting cover and the vertical rod, so that the lifting and pressing The lifting operation of the cover is smoother, and the installation of the fixed top cover is fixed by the setting of four groups of vertical rods.

As a further technical solution of the present invention, the middle of the upper end of the fixed top cover is provided with a second hydraulic press for driving the lifting and lowering cover, and the side of the outer surface of the upper end of the fixed top cover close to the second hydraulic press is fixedly installed with a feeding material The feeding nozzle and the lifting and pressing cover are connected through a telescopic material pipe. The lifting and pressing cover, the fixed bottom plate and the upper mold cover are all provided with injection holes for the use of the telescopic material pipe. The setting of the tube can make the corresponding length adjustment of the telescopic material tube when the lifting and pressing cover moves down, and the lifting and pressing cover is driven by the second hydraulic press, so that the lifting and pressing cover drives the upper mold cover to move up and down.

As a further technical solution of the present invention, a jack is fixedly installed on the outer surface of the upper end of the lifting mandrel, the upper end of the fixed base is provided with a notch for use with the lifting jack and the jack, and the user drives the lifting bracket through the first hydraulic machine. plate, so that the lifting pallet drives the four sets of lifting mandrels to move up, and through the top of the lifting mandrel, the cooled gearbox shell blank between the lower mold body and the module is pushed out, and the removal of the gearbox shell blank is completed. mode operation.

As a further technical solution of the present invention, the lifting and pressing cover, the fixed bottom plate and the inner side of the upper mold cover are all provided with several groups of exhaust grooves, the outer surface of the lower end of the lower mold body is fixedly installed with a fixed clip, and the lower mold body is A fixed card board is fixedly installed on the side.

Beneficial effects of the present invention:

1. By setting the lifting mandrel and the lifting support plate, when the mold forming machine for casting the gearbox casing is used, the lifting mandrel and the lifting support plate are used to cooperate with the use of the first hydraulic press, so that it forms an ejector-assisted demoulding. Structure, the user activates the second hydraulic press, so that the second hydraulic press drives the lifting and pressing cover to move down, and uses the lifting and pressing cover to drive the fixed bottom plate and the upper mold cover to move down, thereby closing the space between the upper mold cover and the lower mold body, Using the setting of the telescopic material tube, the telescopic material pipe can be adjusted according to the length when the lifting and pressing cover is moved down. The user pours the molten metal material into the feeding nozzle, and the feeding nozzle passes through the telescopic material pipe. , cooperate with the injection hole of the lifting and pressing cover, the fixed bottom plate and the upper mold cover, pour the metal material between the lower mold body and the module, and after the metal solution is cooled, form the gearbox shell blank, and use the positioning guide rod and The docking between the circular groove slots can improve the accuracy of the lifting and pressing cover when it is closed. The user drives the lifting and pressing cover to move up through the second hydraulic press to open the upper end of the lower mold body, and the user drives the lifting and lowering cover through the first hydraulic press. The support plate makes the lifting support plate drive the four sets of lifting mandrels to move up, and through the top of the lifting mandrel, the cooled gearbox shell blanks between the lower mold body and the module are pushed out from the four corners, and the gearbox shell is completed. For the demoulding operation of the body blank, the setting of the lifting ejector rod and the lifting supporting plate makes the mold forming machine for casting the gearbox casing have an auxiliary demoulding structure, which improves the use effect.

2. The water tank is matched with the lower mold body of the hollow structure. When the mold forming machine for casting the gearbox casing is used, the use of the pump body can be used to pressurize the water tank, which is convenient for the water tank to drain and cool down. The water body flows into the circulation groove of the lower mold body through the water inlet pipe, and cooperates with the drain pipe to discharge the water body from the circulation groove of the lower mold body, so that the water body circulates in the circulation groove of the lower mold body. At the same time, the drain pipe and the connecting pipe can be used to guide the discharged water into the serpentine pipe of the cooling box, and the water body in the serpentine pipe can be cooled by the fan, so as to facilitate its recycling. , With the use of the connecting pipe, the inner side of the lower mold body has a cyclic cooling and cooling structure, which can effectively reduce the time required for cooling and cooling of the gearbox shell when the mold forming machine for casting the gearbox shell is used. work efficiency.

3. By setting the lifting and pressing cover and the exhaust groove, when the mold forming machine for casting the gearbox casing is used, the lifting and pressing cover, the fixed bottom plate and the exhaust groove of the upper mold cover are used. When the nozzle cooperates with the telescopic material tube to inject metal material between the lower mold body and the module, after the metal material is filled, the excess air between the lower mold body and the module is discharged through the exhaust slot to avoid the hollow phenomenon of the lower mold body and the module. , to prevent bubble-like holes in the gearbox casing and improve its processing quality. Secondly, the setting of the roller can reduce the friction between the lifting cover and the vertical rod, making the lifting operation of the lifting cover smoother.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

1 is a schematic diagram of the overall structure of a mold forming machine for casting a gearbox casing according to the present invention;

2 is a partial structural diagram of a lower mold body in a mold forming machine for casting a gearbox casing according to the present invention;

3 is an overall structural diagram of a lifting pallet in a mold forming machine for casting a gearbox casing according to the present invention;

4 is an overall structural diagram of a lifting and pressing cover in a mold forming machine for casting a gearbox casing according to the present invention;

5 is an overall structural diagram of a water tank in a mold forming machine for casting a gearbox casing according to the present invention.

In the figure: 1. Water tank; 2. The first hydraulic press; 3. Fixed base; 4. Lower mold body; 5. Module; Hydraulic press; 10. Feeding nozzle; 11. Telescopic material pipe; 12. Fixed bottom plate; 13. Circulation groove; 14. Fixed clip; 15. Fixed clip; plate; 19, positioning guide rod; 20, roller; 21, water inlet pipe; 22, cooling box; 23, fan; 24, connecting pipe; 25, drain pipe; 26, pump body; 27, exhaust groove; 28, Upper mold cover.

Detailed ways

In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific embodiments, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

As shown in Figures 1-5, a mold forming machine for gearbox casing casting includes a fixed base 3 and a lower mold body 4. The lower mold body 4 is spliced and installed on the outer surface of the upper end of the fixed base 3, and the upper end of the fixed base 3 The outer surface is located in the middle of the lower mold body 4 and the module 5 is spliced and installed. The inner side of the lower mold body 4 is a hollow structure, and the inner side of the lower mold body 4 is provided with a circulation groove 13. The inner side of the fixed base 3 is fixedly installed with a first hydraulic press. 2, and the upper end of the first hydraulic press 2 is fixedly installed with a lifting support plate 18, the four corners of the upper end of the lifting support plate 18 are fixedly installed with lifting pins 17 for demoulding, and a water tank is fixedly installed on the outer surface of one side of the fixed base 3 1. A water inlet pipe 21 is fixedly installed on the upper outer surface of the water tank 1. The water tank 1 and the lower mold body 4 are connected through the water inlet pipe 21. A fixed bottom plate 12 is movably installed above the lower mold body 4, and the lower end of the fixed bottom plate 12 is installed. An upper mold cover 28 is fixedly mounted on the outer surface.

One end of the water tank 1 is fixedly installed with a communication pipe 24, and the middle position of the communication pipe 24 is fixedly sleeved with a heat dissipation box 22, a fan 23 is fixedly installed on the outer surface of the side of the heat dissipation box 22, and a serpentine tube is arranged in the heat dissipation box 22. A drain pipe 25 is fixedly installed on the outer surface of one end of the communication pipe 24. The communication pipe 24 and the lower mold body 4 are connected through the drain pipe 25. The water in the water tank 1 flows into the circulation tank 13 of the lower mold body 4 through the water inlet pipe 21. , Cooperate with the drainage pipe 25 to discharge the water body from the circulation groove 13 of the lower mold body 4, so that the water body circulates in the circulation groove 13 of the lower mold body 4, and has a cooling effect on the gearbox shell blank in the lower mold body 4. At the same time The water body can be introduced into the serpentine pipe of the heat dissipation box 22 by using the drain pipe 25 and the communication pipe 24, and the water body in the serpentine pipe can be cooled by the fan 23 to facilitate its recycling.

The inner side of the water tank 1 is fixedly installed with a pump body 26, and the drain pipe 25 and the water inlet pipe 21 are all L-shaped as a whole. The use of the pump body 26 can be used to pressurize the water tank 1, which is convenient for the water tank 1 to perform drainage and cooling operations. .

The lifting and pressing cover 7 is fixedly installed on the outer surface of the upper end of the fixed base plate 12 , the positioning guide rods 19 are fixedly installed at the four corners of the lower end of the fixed base plate 12 , and the four corners of the upper end of the lower mold body 4 are equipped with the positioning guide rods 19 . The circular groove slot, when the lifting and pressing cover 7 moves down, the lifting and pressing cover 7 drives the fixed bottom plate 12, so that the fixed bottom plate 12 drives the upper mold cover 28 to move down, thereby closing the upper part of the lower mold body 4, and the user can pass The melted metal solution is introduced between the lower mold body 4 and the module 5. After the metal solution is cooled, a blank of the gearbox housing is formed. By using the docking between the positioning guide rod 19 and the circular groove slot, the lifting and lowering can be lifted. Accuracy when the gland 7 is closed.

A fixed top cover 8 is installed above the lifting and pressing cover 7. The fixed top cover 8 and the fixed base 3 are connected and fixed by four groups of vertical rods 6. The four corners of the lifting and pressing cover 7 are provided with round holes, and the vertical rods 6 Through the round hole, a roller 20 for use with the vertical rod 6 is movably installed in the round hole. The setting of the roller 20 can reduce the friction between the lifting and pressing cover 7 and the vertical rod 6, so that the lifting and pressing cover 7 can be lowered. The lifting operation is smoother, and the installation of the fixed top cover 8 is fixed by the setting of the four groups of vertical rods 6 .

The middle of the upper end of the fixed top cover 8 is provided with a second hydraulic press 9 for driving the lifting and lowering cover 7, and the side of the outer surface of the upper end of the fixed top cover 8 close to the second hydraulic press 9 is fixedly installed with a feeding nozzle 10. The feeding nozzle 10 The lifting and lowering cover 7 is connected through the telescopic material pipe 11. The lifting and lowering cover 7, the fixed bottom plate 12 and the upper mold cover 28 are all provided with injection holes for use with the telescopic material pipe 11. The setting can adjust the length of the telescopic material tube 11 when the lifting and pressing cover 7 moves down, and the lifting and pressing cover 7 is driven by the second hydraulic press 9, so that the lifting and pressing cover 7 drives the upper mold cover 28 to move up and down.

A jack 16 is fixedly installed on the outer surface of the upper end of the lifting mandrel 17 , and the upper end of the fixed base 3 is provided with a notch for use with the lifting jack 17 and the jack 16 . The plate 18 drives the four groups of lift pins 17 to move up, and through the jacks 16 of the lift pins 17, the cooled gearbox housing blanks between the lower mold body 4 and the module 5 are pushed out, and the blank of the gearbox housing is completed. Demoulding operation.

The lifting and pressing cover 7 , the fixed bottom plate 12 and the inner side of the upper mold cover 28 are all provided with several groups of exhaust grooves 27 , the outer surface of the lower end of the lower mold body 4 is fixedly installed with a fixed clip 14 , and the side of the lower mold body 4 is fixed A fixed card board 15 is installed.

The mold forming machine for casting a gearbox casing is provided with a lifting ejector rod 17 and a lifting supporting plate 18. When the mold forming machine for casting a gearbox casing is used, the lifting ejecting rod 17 and the lifting supporting plate 18 are used to cooperate with each other. The use of the first hydraulic press 2 makes it form an ejector-type auxiliary demoulding structure. By starting the second hydraulic press 9, the user makes the second hydraulic press 9 drive the lifting and pressing cover 7 to move down, and the lifting and pressing cover 7 is used to drive the fixed bottom plate. 12 and the upper mold cover 28 are moved down, thereby closing the space between the upper mold cover 28 and the lower mold body 4. Using the setting of the telescopic material pipe 11, when the lifting and pressing cover 7 is moved down, the telescopic material pipe 11 can be made corresponding The user pours the melted metal material into the feeding nozzle 10, the feeding nozzle 10 passes through the telescopic material pipe 11, and cooperates with the lifting and pressing cover 7 to fix the injection hole of the bottom plate 12 and the upper mold cover 28, The metal material is poured between the lower mold body 4 and the module 5, and after the metal solution is cooled, the gearbox housing blank is formed, and the lifting and lowering cover can be lifted by the docking between the positioning guide rod 19 and the circular groove slot. 7. Accuracy when closing, the user drives the lifting and pressing cover 7 to move up through the second hydraulic press 9, opens the upper end of the lower mold body 4, and the user drives the lifting and lowering plate 18 through the first hydraulic press 2, so that the lifting and lowering plate 18 drives The four sets of lift pins 17 move up, and through the jacks 16 of the lift pins 17, the cooled gearbox housing blanks between the lower mold body 4 and the module 5 are ejected from the four corners, and the transmission housing blank is completed. In the demolding operation, the setting of the lifting mandrel 17 and the lifting support plate 18 makes the mold forming machine for casting the gearbox casing have an auxiliary demoulding structure to improve its use effect;

By matching the lower mold body 4 of the hollow structure with the water tank 1, when the mold forming machine for casting the gearbox casing is used, the use of the pump body 26 can perform a pressurization operation in the water tank 1, which is convenient for the water tank 1 to perform drainage and cooling operations. The water in the water tank 1 flows into the circulation tank 13 of the lower mold body 4 through the water inlet pipe 21 , and cooperates with the drain pipe 25 to discharge the water body from the circulation tank 13 of the lower mold body 4 , so that the water body circulates in the circulation tank 13 of the lower mold body 4 . , to cool the gearbox shell blank in the lower mold body 4, and at the same time, the drain pipe 25 and the communication pipe 24 can be used to guide the discharged water body into the serpentine tube of the heat dissipation box 22, and the fan 23 can cool the serpentine tube in the serpentine tube. The water body is cooled to facilitate its recycling. The circulation groove 13 of the lower die body 4 is used in conjunction with the use of the communication pipe 24, so that the inner side of the lower die body 4 has a circulating cooling and cooling structure. When the molding machine is in use, it can effectively reduce the time required for cooling the gearbox casing and improve its work efficiency;

By providing the lifting and pressing cover 7 and the exhaust groove 27, the lifting and pressing cover 7, the exhaust groove 27 of the fixed bottom plate 12 and the upper mold cover 28 are used when the transmission case casting mold forming machine is used. When the user injects metal material between the lower mold body 4 and the module 5 through the feeding nozzle 10 and the telescopic material pipe 11, after the metal material is filled, the excess air between the lower mold body 4 and the module 5 passes through the exhaust groove 27 Discharge, avoid the hollow phenomenon of the lower mold body 4 and the module 5, prevent the bubble-like holes in the gearbox casing, and improve the processing quality. The friction force between them makes the lifting and lowering operation of the lifting and pressing cover 7 smoother.

The above descriptions are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art , without departing from the scope of the technical solution of the present invention, when the technical content disclosed above can be used to make some changes or modifications to equivalent embodiments of equivalent changes, as long as it does not depart from the technical solution content of the present invention, according to the technical solution of the present invention Substantially any brief modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solutions of the present invention.

Claims (8)

1. The utility model provides a casting of gearbox casing is with mould make-up machine, its characterized in that includes unable adjustment base (3) and die body (4) down, die body (4) concatenation is installed at the upper end surface of unable adjustment base (3) down, the module (5) are installed in the middle part position concatenation of die body (4) down to the upper end surface of unable adjustment base (3), the inboard of die body (4) is hollow structure down, and the inboard of die body (4) is equipped with circulation groove (13) down, the inboard fixed mounting of unable adjustment base (3) has first hydraulic press (2), and the upper end fixed mounting of first hydraulic press (2) has lifting support plate (18), the equal fixed mounting in upper end four corners department of lifting support plate (18) has lift ejector pin (17) that are used for the drawing of patterns, one side surface fixed mounting of unable adjustment base (3) has water tank (1), the upper portion surface fixed mounting of water tank (1) has inlet tube (21), the water tank (1) is connected with the lower die body (4) through a water inlet pipe (21), a fixed base plate (12) is movably mounted above the lower die body (4), and an upper die cover (28) is fixedly mounted on the outer surface of the lower end of the fixed base plate (12).

2. The mold forming machine for casting the gearbox shell as claimed in claim 1, wherein a communicating pipe (24) is fixedly mounted at one end of the water tank (1), a heat dissipation box (22) is fixedly sleeved at the middle position of the communicating pipe (24), a fan (23) is fixedly mounted on the outer surface of the side edge of the heat dissipation box (22), a coiled pipe is arranged in the heat dissipation box (22), a drain pipe (25) is fixedly mounted on the outer surface of one end of the communicating pipe (24), and the communicating pipe (24) is in through connection with the lower mold body (4) through the drain pipe (25).

3. The forming machine for the casting die of the gearbox shell as claimed in claim 2, wherein a pump body (26) is fixedly mounted on the inner side of the water tank (1), and the whole of the water outlet pipe (25) and the water inlet pipe (21) is of an L-shaped structure.

4. The forming machine for the casting die of the gearbox shell as claimed in claim 1, wherein a lifting gland (7) is fixedly mounted on the outer surface of the upper end of the fixed bottom plate (12), positioning guide rods (19) are fixedly mounted at four corners of the lower end of the fixed bottom plate (12), and circular groove slots matched with the positioning guide rods (19) are formed in four corners of the upper end of the lower die body (4).

5. The forming machine for the casting die of the gearbox shell as claimed in claim 4, wherein a fixed top cover (8) is installed above the lifting gland (7), the fixed top cover (8) and the fixed base (3) are fixedly connected through four groups of vertical rods (6) in a butt joint mode, round holes are formed in four corners of the lifting gland (7), the vertical rods (6) penetrate through the round holes, and rolling shafts (20) matched with the vertical rods (6) are movably installed in the round holes.

6. The forming machine for the casting die of the gearbox shell as claimed in claim 5, wherein a second hydraulic machine (9) for driving the lifting gland (7) is arranged in the middle of the upper end of the fixed top cover (8), a feeding nozzle (10) is fixedly installed on one side, close to the second hydraulic machine (9), of the outer surface of the upper end of the fixed top cover (8), the feeding nozzle (10) is in through connection with the lifting gland (7) through a telescopic material pipe (11), and the lifting gland (7), the fixed base plate (12) and the upper die cover (28) are provided with material injection holes matched with the telescopic material pipe (11) for use.

7. The forming machine for the casting die of the gearbox shell as claimed in claim 1, wherein the outer surface of the upper end of the lifting ejector rod (17) is fixedly provided with an ejector head (16), and the upper end of the fixed base (3) is provided with a notch matched with the lifting ejector rod (17) and the ejector head (16).

8. The forming machine for the casting die of the gearbox shell as claimed in claim 6, wherein a plurality of groups of exhaust grooves (27) are formed in the inner sides of the lifting gland (7), the fixed base plate (12) and the upper die cover (28), a fixed clamping strip (14) is fixedly installed on the outer surface of the lower end of the lower die body (4), and a fixed clamping plate (15) is fixedly installed on the side edge of the lower die body (4).

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