White mold refractory material coating device for lost foam casting of gearbox shell

Abstract

The invention discloses a white mold refractory material coating device for lost foam casting of a gearbox shell, and relates to the related field of mold processing technology.The white mold refractory material coating device comprises a material supplementing tank and a material soaking pool, the material supplementing tank is fixedly installed on one side of the material soaking pool, and a rotating disc is movably installed on the inner side of the material soaking pool; a plurality of sets of fixing frames used for fixing a die body are annularly distributed on one side of the rotary disc, each fixing frame comprises a connecting disc, a telescopic rod and a plurality of sets of telescopic sleeves, the telescopic rods are elastically installed in the middle of one end of the connecting disc, the telescopic sleeves are annularly distributed on the periphery of the connecting disc, and the telescopic sleeves are elastically connected with the connecting disc. Needle-shaped pieces are movably installed at one ends of the multiple sets of telescopic sleeves, each needle-shaped piece comprises a connecting frame and two metal needles, and the two metal needles are movably installed on one side of the connecting frame; a traditional wooden frame type fixing structure is replaced, the fixing operation on the white mold can be rapidly completed, the contact area with the white mold is reduced, and the coating effect when the refractory material on the surface of the white mold is immersed is improved.

Description

Technical Field

[0001] The present invention relates to the field related to mold processing technology, and in particular to a white mold refractory material coating device for lost foam casting of a gearbox housing. Background Art

[0002] Lost foam casting is a casting process that uses an expandable foam model as a mold, vaporizes the model through high-temperature molten metal and fills the cavity, and produces a foam model consistent with the gearbox housing through CNC machining or foaming molding. Multiple foam modules are combined into a whole to form a cavity that matches the shape of the casting. Multiple layers of refractory coating (such as silica sol coating) are coated on the surface of the foam model and wrapped with dry sand (such as chromite sand or quartz sand) to form a high-strength shell. The coating device is mainly used to coat the surface of the white mold (foam mold) with refractory material.

[0003] White mold refers to a foam model made of foam material. During the processing of the gearbox housing, after the high-temperature molten metal (such as aluminum alloy, cast iron or cast steel) is injected into the cavity, the foam model quickly vaporizes and disappears, and the molten metal occupies the position of the original model and forms a casting after cooling;

[0004] The surface of the white mold is usually covered with a layer of refractory material to improve its structural performance. The traditional processing method is to first fix the white mold with a wooden frame, and then manually immerse the fixed white film into the refractory material so that the refractory material is coated on the surface of the white film. The wooden frame plays a role in fixing multiple groups of white films, improving the coating effect of the white mold surface, and avoiding manual contact with the white film surface. However, the wooden frame fixing method has a complex structure. When the wooden frame is dismantled, it is damaged and cannot be reused. In addition, there are many contact surfaces between the wooden frame and the white mold, making it impossible to complete the coating of the fireproof material on the contact surface, thereby reducing the integrity of the fireproof material coating on the white film surface.

[0005] In summary, the coating device in the prior art has the problem that it cannot quickly complete the fixing operation of the white mold, and the fixing method of the wooden frame structure has the technical problems of poor coating effect and non-reusability. Summary of the Invention

[0006] The present invention provides a white mold refractory material coating device for lost foam casting of a gearbox housing, which can solve the technical problems in the prior art that the coating device cannot quickly complete the white mold fixing operation, the fixing method of the wooden frame structure has poor coating effect, and cannot be reused.

[0007] A white mold refractory material coating device for lost foam casting of a gearbox housing comprises a feeding tank and an immersion pool, wherein the feeding tank is fixedly mounted on one side of the immersion pool, a turntable is movably mounted on the inner side of the immersion pool, and a plurality of groups of fixing frames for fixing the mold body are distributed in a ring shape on one side of the turntable, the fixing frames comprise a connecting plate, a telescopic rod and a plurality of groups of telescopic sleeves, the telescopic rod is elastically mounted in the middle position of one end of the connecting plate, a plurality of groups of telescopic sleeves are distributed in a ring shape around the connecting plate, the telescopic sleeves are elastically connected to the connecting plate, a needle-shaped part is movably mounted on one end of the plurality of telescopic sleeves, the needle-shaped part comprises a connecting frame and two metal needles, and the two metal needles are movably mounted on one side of the connecting frame.

[0008] As a further technical solution of the present invention, the telescopic rod and the connecting plate are elastically connected by a first elastic sleeve, and the first elastic sleeve and the connecting plate are fixedly connected. One end of the telescopic rod is fixedly installed with an arc-shaped head, and the other end of the telescopic rod is fixedly installed with a docking sleeve, and a docking card strip is installed on the inner side of the docking sleeve. A spring buckle is installed on the inner side of the first elastic sleeve. The spring buckle can be used to fix the telescopic rod when it is inserted into the first elastic sleeve. Pressing the spring buckle makes the spring buckle pop outward, and the telescopic rod can be pulled out of the first elastic sleeve to complete the separation operation of the telescopic rod. The connecting plate plays a connecting and fixing role in the installation of several groups of needle-shaped parts.

[0009] As a further technical solution of the present invention, an inclined push rod is installed at the other end of the telescopic sleeve, and a second elastic sleeve is sleeved on the outer surface of the inclined push rod. One end of the second elastic sleeve is fixed to the connecting plate, and a spring is installed in the second elastic sleeve and the first elastic sleeve. The outer surface of the inclined push rod is located on the inner side of the second elastic sleeve and a limited clamping ring is fixedly installed. The end of the inclined push rod is an inclined structure. The white mold is a mold body made of foam material. The mold body needs to be impregnated and coated with a fire-resistant layer to improve the surface quality. The traditional way is to use a wooden frame to fix the mold body, and the mold body is fixed by holding a wooden frame. The frame is made of foam and the mold is immersed in the refractory material so that the refractory material is coated on the surface of the mold. There are certain shortcomings in the way the wooden frame fixes the mold. The assembly of the wooden frame takes a certain amount of time, and when the wooden frame is disassembled, it is damaged and cannot be recycled. There is a contact surface between the wooden frame and the mold. When the coating operation is performed, the contact surface of the mold cannot be coated, which reduces the efficiency of the coating effect during the mold support and fixing operation. By setting a fixing frame and a needle-shaped piece, it can quickly complete the mold fixing operation, while reducing its contact surface and improving its coating effect. During operation, the fixed The needle-shaped part of the frame is placed on the inner side of the mold body. By pressing the telescopic rod, the arc-shaped head at one end of the telescopic rod extends from the lower part of the first elastic sleeve. At this time, the telescopic rod is fixed by the spring buckle, and the extended arc-shaped head squeezes several groups of inclined push rods at the same time. Because one end of the inclined push rod is an inclined structure, several groups of inclined push rods move outward at the same time, so that the inclined push rods push the needle-shaped part, so that the metal needle of the needle-shaped part is inserted into the inner side of the mold body. Because the mold body is made of foam material, the metal needle can be easily inserted into the mold body. At the same time, because the metal needle itself is thin, the metal needle leaves a mark on the mold body. The hole is small and will not affect the normal use of the mold. At the same time, it reduces the contact surface when the mold is fixed, so that the entire surface of the mold is coated. Secondly, when the mold is separated, only one step is required. By pressing the spring buckle, the spring buckle rebounds outward. At this time, the telescopic rod is elastically reset under the action of the first elastic sleeve, and the arc-shaped head is pulled out from between several groups of inclined push rods. After several groups of inclined push rods lose the extrusion of the arc-shaped heads, the inclined push rods are elastically reset under the action of the second elastic sleeve, thereby returning several groups of needle-shaped parts to their original positions, so that the metal needles are pulled out from the inside of the mold, and the mold and the fixing frame are easily separated.

[0010] As a further technical solution of the present invention, the telescopic sleeve and the needle-shaped member are fixed together by an inner sleeve rod. A fastening bolt used in conjunction with the inner sleeve rod is installed on the surface of the telescopic sleeve. Because different models of gearbox housings have different structures of applicable molds, the use position of the needle-shaped member can be adjusted by the inner sleeve rod, and the fastening bolt plays a locking and fixing role between the telescopic sleeve and the inner sleeve rod.

[0011] As a further technical solution of the present invention, the connecting frame and the metal needle are movably connected by a lifting slider. An adjustment seat is provided in the middle of one end of the lifting slider for use with the metal needle. The lifting slider can be used to adjust the insertion position of the metal needle so that both metal needles are in a good docking position. The moved lifting slider can be locked and fixed by the bolt structure, and the insertion depth of a single metal needle can be independently controlled by the adjustment seat, so that the metal needle can be independently adjusted according to the inner structure of the mold body.

[0012] As a further technical solution of the present invention, a push plate is movably installed inside the adjusting seat, and the push plate is fixedly connected to one end of the metal needle. The adjusting seat and the push plate are driven by a screw rod, and the adjusting seat and the push plate are movably connected by a limiting guide rod. Because the metal needle is small, in order to solve the problem of adjusting its length, an adjusting seat is set. During operation, by rotating the screw rod, the screw rod drives the push plate using the threaded structure, so that the push plate moves along the limiting guide rod, and the metal needle is pushed outward by the push plate, thereby adjusting the insertion depth of the metal needle.

[0013] As a further technical solution of the present invention, an elastic rod is elastically installed on the inner side of the turntable for use with a docking sleeve, a conical disk is fixedly installed on one end of the elastic rod, a circular retaining ring is fixedly installed on the outer surface of the elastic rod, and a spring is installed between the turntable and the elastic rod. During the rotation of the turntable, the arc block can be used to drive the elastic rod to move, thereby completing the separation operation of the fixed frame.

[0014] As a further technical solution of the present invention, an arc block is installed at the rear end of the turntable. The arc block has an overall annular structure, and both ends of the arc block are inclined. The arc block and the lifting platform are fixedly connected. When the conical disk rotates to one end of the arc block, the inclined structure at one end of the arc block is utilized. When the conical disk rotates and moves, the arc block pulls the conical disk outward through the arc block, so that the conical disk pulls the elastic insertion rod to move, thereby causing the elastic insertion rod to be pulled out of the docking sleeve, and within the moving range of the arc block, the elastic insertion rod is retracted to the inside of the turntable. When the conical disk moves out of the arc block, the elastic insertion rod is pushed out again under the action of the spring, so that the elastic insertion rod makes corresponding movements according to the discharge rack.

[0015] As a further technical solution of the present invention, a discharge rack is fixedly installed on one side of the immersion tank. The discharge rack is tilted as a whole, and the cross-section of the discharge rack is a convex structure. The middle part of the turntable is driven by a motor. When the elastic insertion rod is retracted, the fixed frame slides down along the discharge rack. The convex structure design of the discharge rack can better adapt to the structure at both ends of the telescopic rod.

[0016] As a further technical solution of the present invention, a T-shaped base is provided at the lower end of the lifting platform, and the lifting platform and the T-shaped base are driven by a hydraulic rod. The hydraulic rod can drive the lifting platform, so that the lifting platform drives the turntable and the fixed frame to move up and down, thereby adjusting the immersion depth according to the model of the mold.

[0017] Beneficial effects of the present invention:

[0018] 1. By setting up a fixing frame, when the white mold refractory material coating device for lost foam casting of the gearbox housing is used, it replaces the traditional wooden frame fixing structure, can quickly complete the fixing operation of the white mold, reduce the contact area with the white mold, and improve the refractory material coating effect on the surface of the white mold;

[0019] By setting up a fixing frame and a needle-shaped piece, it is possible to quickly complete the mold body fixing operation, while reducing its contact surface and improving its coating effect. During operation, the needle-shaped piece of the fixing frame is placed on the inner side of the mold body, and the telescopic rod is pressed so that the arc-shaped top head at one end of the telescopic rod extends from the lower part of the first elastic sleeve. At this time, the telescopic rod is fixed by the spring clip, and the extended arc-shaped top head squeezes several groups of inclined push rods at the same time. Because one end of the inclined push rod is a bevel structure, several groups of inclined push rods move outward at the same time, so that the inclined push rod pushes the needle-shaped piece, so that the metal needle of the needle-shaped piece is inserted into the inner side of the mold body. Because the mold body is made of foam material, the metal needle can be easily inserted into the mold body. At the same time, because the metal needle itself is thinner, the hole left by the metal needle on the mold body is smaller. The size of the mold body is small and will not affect the normal use of the mold body. At the same time, it reduces the contact surface when the mold body is fixed. The motor is used to drive the turntable, so that the turntable drives the fixing frame to rotate, and the white film installed on the fixing frame is immersed in the refractory material of the immersion tank, so that the entire surface of the mold body is coated with refractory material. Secondly, when the mold body is separated, only one step is needed. After the refractory coating is solidified, the spring buckle is pressed to make the spring buckle rebound outward. At this time, the telescopic rod is elastically reset under the action of the first elastic sleeve, and the arc-shaped head is pulled out from between several groups of inclined push rods. After several groups of inclined push rods lose the extrusion of the arc-shaped head, the inclined push rods are elastically reset under the action of the second elastic sleeve, thereby returning several groups of needle-shaped parts to their original positions, so that the metal needle is pulled out from the inside of the mold body, making it easy to separate the mold body and the fixing frame.

[0020] 2. By providing an inner sleeve rod and an adjustment seat, the fixing effect of the fixing frame is improved when the white mold refractory material coating device for lost foam casting of the gearbox housing is used, and the technical problem of uneven insertion depth of the metal needle and inability to adapt to different models of white molds is solved;

[0021] During use, because different types of gearbox housings have different structures of applicable molds, the use position of the needle-shaped part can be adjusted through the inner sleeve rod, and the fastening bolt plays a locking and fixing role between the telescopic sleeve and the inner sleeve rod, thereby completing the synchronous adjustment of the insertion depth of the two metal needles;

[0022] According to the surface structural characteristics of the white mold, the insertion position of the metal needle can be adjusted using the lifting slider so that the two metal needles are in a good docking position. The moved lifting slider can be locked and fixed by the bolt structure, and the insertion depth of a single metal needle can be independently controlled by the adjustment seat, so that the metal needle can be independently adjusted according to the inner structure of the mold body. Because the metal needle is small in size, in order to solve the problem of adjusting its length, an adjustment seat is set. During operation, by rotating the screw rod, the screw rod drives the push plate using the threaded structure, so that the push plate moves along the limit guide rod, and the metal needle is pushed outward by the push plate, thereby adjusting the insertion depth of the metal needle, so that the metal needle can be adjusted to any position and length. When the two metal needles are inserted into the white mold, they are kept at the same insertion depth, thereby improving the film fixing effect.

[0023] 3. By setting up a lifting platform and elastic insertion rods, the use of the fixing frame is optimized when the white mold refractory material coating device for lost foam casting of the gearbox housing is used, solving the technical problem of poor stability of the metal needle and allowing the fixing frame to automatically complete the material collection operation;

[0024] During operation, because the metal needles are small in size, multiple metal needles are required to complete the fixing operation of the white mold. Compared with the traditional wooden frame structure, when the white mold is moved out of the refractory material, it is affected by the resistance when it moves upward, and the white mold fixed by the metal needles is prone to falling off. The hydraulic rod can be used to drive the lifting platform, so that the lifting platform drives the turntable and the fixing frame to move up and down, so as to adjust the immersion depth according to the mold model, control the immersion depth of the white mold, reduce the resistance when the white mold moves upward, and avoid it from falling off;

[0025] By utilizing the inclined surface structure at one end of the arc block, when the conical disk rotates and moves, the arc block pulls the conical disk outward through the arc block, so that the conical disk pulls the elastic insertion rod to move, thereby withdrawing the elastic insertion rod from the docking sleeve, and retracting the elastic insertion rod to the inside of the turntable within the moving range of the arc block. When the conical disk moves out of the arc block, the elastic insertion rod is pushed out again under the action of the spring, so that the elastic insertion rod moves accordingly according to the discharge rack. When the elastic insertion rod is retracted, the fixed rack slides down along the discharge rack, completing the recovery operation of the fixed rack and the mold body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the overall structure of a white mold refractory material coating device for lost foam casting of a gearbox housing according to the present invention;

[0028] Figure 2 This is an overall structural diagram of a fixing frame in a white mold refractory material coating device for lost foam casting of a gearbox housing according to the present invention;

[0029] Figure 3 This is a planar structural diagram of a needle-shaped component in a white mold refractory material coating device for lost foam casting of a gearbox housing according to the present invention;

[0030] Figure 4 This is an overall structural diagram of a telescopic rod in a white mold refractory material coating device for lost foam casting of a gearbox housing according to the present invention;

[0031] Figure 5 This is an overall structural diagram of a needle-shaped part in a white mold refractory material coating device for lost foam casting of a gearbox housing according to the present invention;

[0032] Figure 6 This is a diagram showing the internal structure of an adjustment seat in a white mold refractory material coating device for lost foam casting of a gearbox housing according to the present invention;

[0033] Figure 7 This is an overall structural diagram of a turntable in a white mold refractory material coating device for lost foam casting of a gearbox housing according to the present invention;

[0034] Figure 8 This is a planar structural diagram of an elastic insert rod in a white mold refractory material coating device for lost foam casting of a gearbox housing according to the present invention;

[0035] Figure 9 This is a diagram showing the state changes of an adjustment seat in use in a white mold refractory material coating device for lost foam casting of a gearbox housing according to the present invention;

[0036] Figure 10 It is a schematic diagram of the structure of the model.

[0037] In the figure: 1. feeding tank; 2. immersion tank; 3. discharge rack; 4. fixing rack; 5. lifting platform; 6. turntable; 7. connecting plate; 8. first elastic sleeve; 9. telescopic rod; 10. docking sleeve; 11. telescopic sleeve; 12. needle-shaped part; 13. inclined push rod; 14. limiting clamp ring; 15. second elastic sleeve; 16. fastening bolt; 17. inner sleeve rod; 18. arc-shaped head; 19. docking strip; 20. spring buckle; 21. connecting rack; 22. metal needle; 23. lifting slider; 24. adjusting seat; 25. screw rod; 26. push plate; 27. limiting guide rod; 28. hydraulic rod; 29. conical disk; 30. arc block; 31. T-type base; 32. elastic plug rod; 33. circular retaining ring; 34. mold body. DETAILED DESCRIPTION

[0038] The following will be combined with the embodiments to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0039] like Figures 1-10 As shown, a white mold refractory material coating device for lost foam casting of a gearbox housing, such as Figure 1 As shown, the white mold refractory material coating device for lost foam casting of the gearbox housing of this embodiment includes a feeding tank 1 and an immersion pool 2. The feeding tank 1 is fixedly installed on one side of the immersion pool 2. A turntable 6 is movably installed on the inner side of the immersion pool 2. Several groups of fixing frames 4 for fixing the mold body 34 are distributed in a ring on one side of the turntable 6. The fixing frame 4 includes a connecting plate 7, a telescopic rod 9 and several groups of telescopic sleeves 11. The telescopic rod 9 is elastically installed in the middle position of one end of the connecting plate 7. Several groups of telescopic sleeves 11 are distributed in a ring around the connecting plate 7. The telescopic sleeve 11 and the connecting plate 7 are elastically connected. One end of each group of telescopic sleeves 11 is movably installed with a needle-shaped part 12. The needle-shaped part 12 includes a connecting frame 21 and two metal needles 22. The two metal needles 22 are movably installed on one side of the connecting frame 21.

[0040] According to the white mold refractory material coating device for lost foam casting of the gearbox housing of the present embodiment of claim 1, the telescopic rod 9 and the connecting plate 7 are elastically connected by the first elastic sleeve 8, and the first elastic sleeve 8 and the connecting plate 7 are fixedly connected. One end of the telescopic rod 9 is fixedly installed with an arc-shaped head 18, and the other end of the telescopic rod 9 is fixedly installed with a docking sleeve 10, and a docking card strip 19 is installed on the inner side of the docking sleeve 10. A spring buckle 20 is installed on the inner side of the first elastic sleeve 8. The spring buckle 20 can be used to fix the telescopic rod 9 when it is inserted into the first elastic sleeve 8. Pressing the spring buckle 20 makes the spring buckle 20 pop out, so that the telescopic rod 9 can be pulled out from the first elastic sleeve 8 to complete the separation operation of the telescopic rod 9. The connecting plate 7 plays a connecting and fixing role in the installation of several groups of needle-shaped parts 12.

[0041] The other end of the telescopic sleeve 11 is equipped with an inclined push rod 13, and the outer surface of the inclined push rod 13 is sleeved with a second elastic sleeve 15. One end of the second elastic sleeve 15 is fixed to the connecting plate 7. Springs are installed in the second elastic sleeve 15 and the first elastic sleeve 8. The outer surface of the inclined push rod 13 is located on the inner side of the second elastic sleeve 15 and is fixedly installed with a limiting clamp 14. The end of the inclined push rod 13 is a bevel structure. The white mold is a mold body 34 made of foam material. The mold body 34 needs to be impregnated and coated with a refractory layer to improve the surface quality. The traditional method is to use a wooden frame to fix the mold 34. By holding the wooden frame, the mold 34 made of foam is immersed in the refractory material so that the refractory material is fully coated on the surface of the mold 34. The wooden frame fixing the mold 34 has certain disadvantages. The assembly of the wooden frame takes a certain amount of time. During the disassembly operation, the wooden frame is damaged and cannot be recycled. In addition, there is a contact surface between the wooden frame and the mold 34. During the coating operation, the contact surface of the mold 34 cannot be coated, which reduces the efficiency of the coating effect when the mold 34 is supported and fixed.

[0042] By setting up the fixing frame 4 and the needle-shaped part 12, it is possible to quickly complete the fixing operation of the mold body 34, while reducing its contact surface and improving its coating effect. During operation, the needle-shaped part 12 of the fixing frame 4 is placed on the inner side of the mold body 34, and the telescopic rod 9 is pressed so that the arc-shaped head 18 at one end of the telescopic rod 9 extends from the lower part of the first elastic sleeve 8. At this time, the telescopic rod 9 is limited and fixed by the spring buckle 20, and the extended arc-shaped head 18 squeezes several groups of inclined push rods 13 at the same time. Because one end of the inclined push rod 13 is an inclined structure, several groups of inclined push rods 13 move outward at the same time, so that the inclined push rod 13 pushes the needle-shaped part 12, so that the metal needle 22 of the needle-shaped part 12 is inserted into the inner side of the mold body 34. Because the mold body 34 is made of foam material, the metal needle 22 can be easily inserted into the mold body 34. 4. At the same time, because the metal needle 22 itself is relatively thin, the hole left by the metal needle 22 on the mold body 34 is relatively small, which will not affect the normal use of the mold body 34. At the same time, the contact surface of the mold body 34 when it is fixed is reduced, so that the surface of the mold body 34 is coated as a whole. Secondly, when the mold body 34 is separated, only one step is needed. By pressing the spring buckle 20, the spring buckle 20 rebounds outward. At this time, the telescopic rod 9 is elastically reset under the action of the first elastic sleeve 8, and the arc-shaped head 18 is pulled out from between the several groups of inclined push rods 13. After the several groups of inclined push rods 13 lose the extrusion of the arc-shaped head 18, the inclined push rods 13 are elastically reset under the action of the second elastic sleeve 15, thereby returning the several groups of needle-shaped parts 12 to their original positions, so that the metal needle 22 is pulled out from the inside of the mold body 34, making it easy to separate the mold body 34 and the fixing frame 4.

[0043] The telescopic sleeve 11 and the needle-shaped member 12 are fixed to each other by an inner sleeve rod 17. A fastening bolt 16 is installed on the surface of the telescopic sleeve 11 to cooperate with the inner sleeve rod 17. Because the structure of the mold body 34 applicable to different models of gearbox housings is different, the use position of the needle-shaped member 12 can be adjusted by the inner sleeve rod 17. The fastening bolt 16 plays a locking and fixing role between the telescopic sleeve 11 and the inner sleeve rod 17.

[0044] The connecting frame 21 and the metal needle 22 are movably connected by a lifting slider 23. An adjustment seat 24 is provided in the middle of one end of the lifting slider 23 for use with the metal needle 22. The lifting slider 23 can be used to adjust the insertion position of the metal needle 22 so that the two metal needles 22 are in a good docking position. The moved lifting slider 23 can be locked and fixed by the bolt structure, and the insertion depth of a single metal needle 22 can be independently controlled by the adjustment seat 24, so that the metal needle 22 can be independently adjusted according to the internal structure of the mold body 34.

[0045] A push plate 26 is movably installed inside the adjusting seat 24, and the push plate 26 is fixedly connected to one end of the metal needle 22. The adjusting seat 24 and the push plate 26 are driven by a screw rod 25, and the adjusting seat 24 and the push plate 26 are movably connected by a limiting guide rod 27. Because the metal needle 22 is small in size, in order to solve the problem of adjusting its length, an adjusting seat 24 is set. During operation, by rotating the screw rod 25, the screw rod 25 drives the push plate 26 using the threaded structure, so that the push plate 26 moves along the limiting guide rod 27, and the metal needle 22 is pushed outward by the push plate 26, thereby adjusting the insertion depth of the metal needle 22.

[0046] A telescopic rod 32 for use with the docking sleeve 10 is elastically installed on the inner side of the turntable 6. A conical disk 29 is fixedly installed on one end of the telescopic rod 32. A circular retaining ring 33 is fixedly installed on the outer surface of the telescopic rod 32. A spring is installed between the turntable 6 and the telescopic rod 32. During the rotation of the turntable 6, the arc block 30 can be used to drive the telescopic rod 32 to move, thereby completing the separation operation of the fixed frame 4.

[0047] The rear end of the turntable 6 is provided with an arc block 30, which has an overall annular structure, and both ends of the arc block 30 are inclined. The arc block 30 is fixedly connected to the lifting platform 5. When the conical disk 29 rotates to one end of the arc block 30, the inclined surface structure at one end of the arc block 30 is utilized. When the conical disk 29 rotates and moves, the arc block 30 pulls the conical disk 29 outward through the arc block 30, so that the conical disk 29 pulls the telescopic plug rod 32 to move, thereby causing the telescopic plug rod 32 to be extracted from the docking sleeve 10. Within the moving range of the arc block 30, the telescopic plug rod 32 is retracted to the inside of the turntable 6. When the conical disk 29 moves out of the arc block 30, the telescopic plug rod 32 is pushed outward again under the action of the spring, so that the telescopic plug rod 32 makes a corresponding movement according to the discharge rack 3.

[0048] A discharge rack 3 is fixedly installed on one side of the immersion tank 2. The discharge rack 3 is tilted as a whole, and the cross-section of the discharge rack 3 is a convex structure. The middle part of the turntable 6 is driven by a motor. When the telescopic rod 32 is retracted, the fixed frame 4 slides down along the discharge rack 3. The convex structure design of the discharge rack 3 can better adapt to the structure at both ends of the telescopic rod 9.

[0049] A T-shaped base 31 is provided at the lower end of the lifting platform 5. The lifting platform 5 and the T-shaped base 31 are driven by a hydraulic rod 28. The hydraulic rod 28 can drive the lifting platform 5, so that the lifting platform 5 drives the turntable 6 and the fixed frame 4 to move up and down, thereby adjusting the immersion depth of the mold body 34 according to the model.

[0050] When in use, by setting the fixing frame 4, when the white mold refractory material coating device for lost foam casting of the gearbox housing is used, it replaces the traditional wooden frame fixing structure, can quickly complete the fixing operation of the white mold, reduce the contact surface with the white mold, and improve the refractory material coating effect on the surface of the white mold;

[0051] By setting up a fixing frame 4 and a needle-shaped part 12, it is possible to quickly complete the fixing operation of the mold body 34, while reducing its contact surface and improving its coating effect. During operation, the needle-shaped part 12 of the fixing frame 4 is placed on the inner side of the mold body 34, and by pressing the telescopic rod 9, the arc-shaped top head 18 at one end of the telescopic rod 9 is extended from the lower part of the first elastic sleeve 8. At this time, the telescopic rod 9 is limited and fixed by the spring buckle 20, and the extended arc-shaped top head 18 squeezes several groups of inclined push rods 13 at the same time. Because one end of the inclined push rod 13 is a bevel structure, several groups of inclined push rods 13 move outward at the same time, so that the inclined push rod 13 pushes the needle-shaped part 12, so that the metal needle 22 of the needle-shaped part 12 is inserted into the inner side of the mold body 34. Because the mold body 34 is made of foam material, the metal needle 22 can be easily inserted into the mold body 34. At the same time, because the metal needle 22 itself is relatively thin, the metal needle 22 leaves a mark on the mold body 34. The hole is small and will not affect the normal use of the mold body 34. At the same time, the contact surface when the mold body 34 is fixed is reduced. The motor drives the turntable 6, so that the turntable 6 drives the fixing frame 4 to rotate, and the white film installed on the fixing frame 4 is immersed in the refractory material of the immersion tank 2, so that the surface of the mold body 34 is coated with refractory material as a whole. Secondly, when the mold body 34 is separated, only one step is required. After the refractory coating is solidified, the spring buckle 20 is pressed to make the spring buckle 20 rebound outward. At this time, the telescopic rod 9 is elastically reset under the action of the first elastic sleeve 8, and the arc-shaped head 18 is pulled out from between the several groups of inclined push rods 13. After the several groups of inclined push rods 13 lose the squeezing of the arc-shaped head 18, the inclined push rods 13 are elastically reset under the action of the second elastic sleeve 15, thereby returning the several groups of needle-shaped parts 12 to their original positions, so that the metal needles 22 are pulled out from the inside of the mold body 34, making it easy to separate the mold body 34 and the fixing frame 4;

[0052] By providing the inner sleeve rod 17 and the adjustment seat 24, when the white mold refractory material coating device for lost foam casting of the gearbox housing is used, the fixing effect of the fixing frame 4 is improved, and the technical problem of the uneven insertion depth of the metal needle 22 and the inability to adapt to different types of white molds is solved;

[0053] During use, because different types of gearbox housings have different structures of the mold body 34, the use position of the needle-shaped member 12 can be adjusted through the inner sleeve rod 17, and the fastening bolt 16 plays a locking and fixing role between the telescopic sleeve 11 and the inner sleeve rod 17, thereby completing the synchronous adjustment of the insertion depth of the two metal needles 22;

[0054] According to the surface structural characteristics of the white mold, the insertion position of the metal needle 22 can be adjusted by using the lifting slider 23, so that the two metal needles 22 are in a good docking position. The moved lifting slider 23 can be locked and fixed by the bolt structure, and the insertion depth of a single metal needle 22 can be independently controlled by using the adjustment seat 24, so that the metal needle 22 can be independently adjusted according to the inner structure of the mold body 34. Because the metal needle 22 is small in size, in order to solve the problem of adjusting its length, an adjustment seat 24 is provided. During operation, by rotating the screw rod 25, the screw rod 25 drives the push plate 26 using the threaded structure, so that the push plate 26 moves along the limiting guide rod 27, and the push plate 26 pushes the metal needle 22 outward, thereby adjusting the insertion depth of the metal needle 22, so that the metal needle 22 can be adjusted to any position and length. When the two metal needles 22 are inserted into the white mold, they are kept at the same insertion depth, thereby improving the film fixing effect;

[0055] By providing the lifting platform 5 and the elastic insertion rod, when the white mold refractory material coating device for lost foam casting of the gearbox housing is used, the use of the fixing frame 4 is optimized, the technical problem of poor stability of the metal needle 22 is solved, and the fixing frame 4 can automatically complete the material receiving operation;

[0056] During operation, because the metal needles 22 are relatively small, multiple metal needles 22 are required to complete the fixing operation of the white mold. Compared with the traditional wooden frame structure, when the white mold is moved out of the refractory material, the white mold fixed by the metal needles 22 is easily affected by the resistance when it moves upward, and the white mold fixed by the metal needles 22 is prone to fall off. The hydraulic rod 28 can be used to drive the lifting platform 5, so that the lifting platform 5 drives the turntable 6 and the fixing frame 4 to move up and down, thereby adjusting the immersion depth of the mold body 34 according to the model, controlling the immersion depth of the white mold, reducing the resistance when the white mold moves upward, and preventing it from falling off;

[0057] By utilizing the inclined surface structure at one end of the arc block 30, when the conical disk 29 rotates and moves, the arc block 30 pulls the conical disk 29 outward through the arc block 30, so that the conical disk 29 pulls the elastic insertion rod to move, thereby withdrawing the elastic insertion rod from the docking sleeve 10, and retracting the elastic insertion rod to the inside of the turntable 6 within the moving range of the arc block 30. When the conical disk 29 moves out of the arc block 30, the elastic insertion rod is pushed out again under the action of the spring, so that the elastic insertion rod makes a corresponding movement according to the discharge rack 3. When the elastic insertion rod is retracted, the fixed frame 4 slides downward along the discharge rack 3, completing the recovery operation of the fixed frame 4 and the mold body 34.

[0058] The above disclosures are only a few specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A white mold refractory material coating device for lost foam casting of a gearbox housing, characterized in that: The invention comprises a feeding tank (1) and a dipping pool (2), wherein the feeding tank (1) is fixedly mounted on one side of the dipping pool (2), a turntable (6) is movably mounted on the inner side of the dipping pool (2), a lifting platform (5) is mounted on the rear end of the turntable (6), a plurality of fixing frames (4) for fixing a mold body (34) are distributed in an annular manner on one side of the turntable (6), the fixing frames (4) comprise a connecting plate (7), a telescopic rod (9) and a plurality of telescopic sleeves (11), the telescopic rod (9) is elastically mounted at the middle position of one end of the connecting plate (7), the plurality of telescopic sleeves (11) are distributed in an annular manner around the connecting plate (7), the telescopic sleeve (11) and the connecting plate (7) are elastically connected, and a needle-shaped member (12) is movably mounted on one end of each of the plurality of telescopic sleeves (11), the needle-shaped member (12) comprises a connecting frame (21) and two metal needles (22), and the two metal needles (22) are movably mounted on one side of the connecting frame (21).

2. The white mold refractory material coating device for lost foam casting of a gearbox housing according to claim 1, characterized in that: The telescopic rod (9) and the connecting plate (7) are elastically connected via a first elastic sleeve (8), and the first elastic sleeve (8) and the connecting plate (7) are fixedly connected. An arc-shaped head (18) is fixedly mounted on one end of the telescopic rod (9), and a docking sleeve (10) is fixedly mounted on the other end of the telescopic rod (9). A docking strip (19) is mounted on the inner side of the docking sleeve (10), and a spring buckle (20) is mounted on the inner side of the first elastic sleeve (8).

3. The white mold refractory material coating device for lost foam casting of a gearbox housing according to claim 2, characterized in that: The other end of the telescopic sleeve (11) is provided with an inclined push rod (13), the outer surface of the inclined push rod (13) is sleeved with a second elastic sleeve (15), one end of the second elastic sleeve (15) is fixedly docked with the connecting plate (7), and springs are installed in both the second elastic sleeve (15) and the first elastic sleeve (8). The outer surface of the inclined push rod (13) is located on the inner side of the second elastic sleeve (15) and is fixedly provided with a limiting snap ring (14), and the end of the inclined push rod (13) is an inclined surface structure.

4. The white mold refractory material coating device for lost foam casting of a gearbox housing according to claim 1, characterized in that: The telescopic sleeve (11) and the needle-shaped member (12) are butt-jointed and fixed via an inner sleeve rod (17), and a fastening bolt (16) used in conjunction with the inner sleeve rod (17) is installed on the surface of the telescopic sleeve (11).

5. The white mold refractory material coating device for lost foam casting of a gearbox housing according to claim 1, characterized in that: The connecting frame (21) and the metal needle (22) are movably connected via a lifting slider (23), and an adjustment seat (24) used in conjunction with the metal needle (22) is provided in the middle of one end of the lifting slider (23).

6. The white mold refractory material coating device for lost foam casting of a gearbox housing according to claim 5, characterized in that: A push plate (26) is movably installed inside the adjusting seat (24), and the push plate (26) is fixedly connected to one end of the metal needle (22). The adjusting seat (24) and the push plate (26) are driven by a screw rod (25), and the adjusting seat (24) and the push plate (26) are movably connected by a limiting guide rod (27).

7. The white mold refractory material coating device for lost foam casting of a gearbox housing according to claim 1, characterized in that: An elastic rod (32) for use with the docking sleeve (10) is elastically mounted on the inner side of the turntable (6); a conical disk (29) is fixedly mounted on one end of the elastic rod (32); a circular retaining ring (33) is fixedly mounted on the outer surface of the elastic rod (32); and a spring is mounted between the turntable (6) and the elastic rod (32).

8. The white mold refractory material coating device for lost foam casting of a gearbox housing according to claim 7, characterized in that: The rear end of the turntable (6) is provided with an arc block (30), the arc block (30) is annular in structure as a whole, both ends of the arc block (30) are inclined, and the arc block (30) and the lifting platform (5) are fixedly connected.

9. The white mold refractory material coating device for lost foam casting of a gearbox housing according to claim 8, characterized in that: A discharge rack (3) is fixedly mounted on one side of the immersion tank (2); the entire discharge rack (3) is tilted, and the cross section of the discharge rack (3) is a convex structure; the middle portion of the turntable (6) is driven by a motor.

10. The white mold refractory material coating device for lost foam casting of a gearbox housing according to claim 1, characterized in that: A T-shaped base (31) is provided at the lower end of the lifting platform (5), and the lifting platform (5) and the T-shaped base (31) are driven by a hydraulic rod (28).

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