A large-sized hexagonal nut casting device

Abstract

The present invention relates to the field of casting technology, and specifically to a casting device for large-sized hexagonal nuts, including a housing. The upper part of the housing is communicated with a lower box body. On the upper surface of the housing, there are two groups of symmetrically arranged swing plates. On the side far away from each other of the two groups of swing plates, they are respectively hinged to the inner wall of the housing through electric hinges. The lower box body is located above the two groups of swing plates; when sand filling operation needs to be carried out, the driving motor is relied on to drive the output shaft to rotate. When the output shaft rotates, it drives the first spiral feeding shaft to rotate. When the first spiral feeding shaft rotates, it conveys the molding sand in the feeding hopper. The molding sand enters the groove of the output shaft through the elastic tube and the through hole. When the molding sand moves down to a certain position in the output shaft, the molding sand is discharged from the discharge port and falls on the swing plate, so as to facilitate the sand filling operation, without the need for manual sand filling, and improve the production efficiency of hexagonal nuts.

Description

Technical Field

[0001] The present invention relates to the field of casting technology, and particularly to a casting device for large-sized hexagonal nuts. Background Art

[0002] Hexagonal nuts are widely used both in industry and in daily life; currently, most large-sized hexagonal nuts are cast. During casting, the upper part of the box body and the lower part of the box body are respectively filled with sand, pressed into a mold, compacted, and demolded. Then, the two parts of the box body are combined together, and liquid metal is injected into the cavities inside the upper part of the box body and the lower part of the box body through a reserved pouring port. After the liquid metal cools down, it is taken out and subjected to subsequent processing, thus completing the production of large-sized hexagonal nuts.

[0003] Currently, when filling sand into the upper box body and the lower box body, most operations are carried out manually. Manual sand filling has a large labor intensity and low efficiency. Therefore, a casting device for large-sized hexagonal nuts is proposed to facilitate the rapid sand filling and compaction of the upper box body and the lower box body, thereby improving the production efficiency of hexagonal nuts. Summary of the Invention

[0004] Aiming at the problems in the prior art, the present invention provides a casting device for large-sized hexagonal nuts, which facilitates the rapid sand filling and compaction of the upper box body and the lower box body, and improves the production efficiency of hexagonal nuts.

[0005] The technical solution adopted by the present invention to solve its technical problems is a casting device for large-sized hexagonal nuts, including a housing. The upper part of the housing is communicated with a lower box body. Two sets of symmetrically arranged swing plates are provided on the upper surface of the housing. One side of each of the two sets of swing plates away from each other is hinged to the inner wall of the housing through an electric hinge. The lower box body is located above the two sets of swing plates.

[0006] A horizontally arranged support frame is provided above the housing. An adjustable sand filling structure is provided on the lower surface of the support frame. A roller pressing structure is provided outside the adjustable sand filling structure. An upper box body corresponding to the lower box body is provided on the lower surface of the support frame. A first hydraulic telescopic rod is fixedly connected to the lower surface of the support frame. The telescopic end of the first hydraulic telescopic rod is fixedly connected to the outside of the upper box body. The adjustable sand filling structure is located inside the upper box body. A filtering structure is provided inside the housing. A feeding structure is provided outside the housing. The lower end of the feeding structure is communicated with the inside of the housing. The other end of the feeding structure is located above the adjustable sand filling structure.

[0007] By adopting the above technical solution, during the production of hex nuts, relying on the adjustable sand filling structure, the molding sand is discharged and falls onto the upper surface of the swing plate of the housing. At this time, the molding sand is located inside the lower mold box. When the molding sand on the swing plate accumulates to a certain amount, the adjustable sand filling structure is closed. At this time, the molding sand no longer discharges through the adjustable sand filling structure. At the same time, the adjustable sand filling structure is driven to move downward. When the rolling pressure structure comes into extrusion contact with the molding sand on the swing plate, the adjustable sand filling structure is driven. Relying on the adjustable sand filling structure to drive the rolling pressure structure to rotate, and at the same time relying on the extrusion between the rolling pressure structure and the molding sand to prevent the molding sand from discharging through the adjustable sand filling structure. When the rolling pressure structure rotates, it rolls and compacts the molding sand. After the rolling compaction is completed, the adjustable sand filling structure is driven to move upward. At this time, the mold of the hex nut is placed on the upper surface of the molding sand, and then the molding sand is discharged again relying on the adjustable sand filling structure. After a certain amount of molding sand is discharged, at this time the mold is located inside the molding sand, the adjustable sand filling structure is closed, and at the same time the adjustable sand filling structure is driven to move downward. When the adjustable sand filling structure moves downward to a certain position, the rolling pressure structure comes into extrusion contact with the molding sand again, and the molding sand is compacted again relying on the rolling pressure structure. After the molding sand is compacted, the molding sand and the upper surface of the mold are at the same horizontal position. At this time, the adjustable sand filling structure is driven to move upward again. After the adjustable sand filling structure moves upward, parting sand is sprinkled on the mold and the upper surface of the molding sand, and the pouring gate mold is placed above the hex nut mold. Then, relying on the first hydraulic telescopic rod to drive the upper mold box to move downward and come into extrusion contact with the upper surface of the lower mold box, the molding sand is discharged relying on the adjustable sand filling structure. After a certain amount of molding sand is discharged, the adjustable sand filling structure is driven to move downward, and at the same time the molding sand is compacted again relying on the rolling pressure structure. After the molding sand is compacted, the molding sand and the upper part of the pouring gate mold are on the same horizontal plane. The adjustable sand filling structure is driven to move upward, and relying on the first hydraulic telescopic rod to drive the upper mold box to move upward. After the upper mold box moves upward to a certain position, the hex nut mold and the pouring gate mold are taken out, and the upper mold box is driven to move downward again to come into extrusion contact with the lower mold box. When the pouring gate mold is taken out, the molding sand in the upper mold box will form a pouring gate. The liquid metal is transported into the upper mold box and the lower mold box through the pouring gate. After waiting for natural cooling to be completed, the upper mold box is driven to move upward, and then the cooled hex nuts are taken out and subsequent processing is carried out, thus completing the production of hex nuts, which is convenient for quickly filling sand and compacting the upper mold box and the lower mold box, without manual repeated sand filling and compaction, improving the production efficiency and production convenience of hex nuts;

[0008] After the hex nuts are taken out, relying on the electric hinge to drive the swing plate to swing. When the swing plate swings, the molding sand on the swing plate falls into the housing. At the same time, the molding sand in the upper mold box is vibrated by using a vibration device or manual vibration to make it loose and fall, and enter the housing. After the molding sand enters the housing, the used molding sand is screened relying on the filtering structure. The qualified molding sand is transported into the adjustable sand filling structure through the feeding structure, which is convenient for quickly screening the used molding sand and reusing it. After the molding sand enters the adjustable sand filling structure, it is convenient for producing the next group of hex nuts.

[0009] It should be noted that after the molding sand in the upper box is compacted and formed, it is also necessary to use a hole-opening device to open exhaust hole positions in the molding sand in the upper box; it should also be noted that in addition to being formed through a pouring gate mold, the pouring gate in the upper box can also be directly opened through a hole-opening device.

[0010] Specifically, the adjustable sand filling structure includes a horizontally arranged mounting plate, the mounting plate is located below the support frame, a second hydraulic telescopic rod is fixedly connected to the lower surface of the support frame, and the telescopic end of the second hydraulic telescopic rod is fixedly connected to the upper surface of the mounting plate;

[0011] A driving motor is fixedly connected to the lower surface of the mounting plate. There is a slot with an upward opening inside the output shaft of the driving motor. An elastic tube is fixedly connected between the upper surface of the mounting plate and the lower surface of the support frame. A through hole communicating with the lower end of the elastic tube is provided on the mounting plate. A feeding funnel is fixedly connected to the upper surface of the support frame. The upper end of the elastic tube passes through the support frame and communicates with the feeding funnel. The lower part of the through hole corresponds to the upper end of the output shaft, and the through hole communicates with the inside of the slot. A vertically arranged first spiral feeding shaft is provided in the slot. The lower end of the first spiral feeding shaft is fixedly connected to the bottom of the slot. The upper end of the first spiral feeding shaft passes through the elastic tube and is located inside the feeding funnel. A plurality of groups of obliquely arranged discharge ports are circumferentially distributed on the outer circumference of the lower end of the output shaft, and the discharge ports communicate with the inside of the slot;

[0012] The roll pressing structure is located at the lower end of the output shaft and is slidably connected to the output shaft.

[0013] By adopting the above technical solution, when sand filling operation is required, rely on the driving motor to drive the output shaft to rotate. When the output shaft rotates, it drives the first spiral feeding shaft to rotate. When the first spiral feeding shaft rotates, it conveys the molding sand in the feeding funnel. The molding sand enters the slot of the output shaft through the elastic tube and the through hole. When the molding sand moves down to a certain position in the output shaft, the molding sand is discharged from the discharge port and falls on the swing plate, so as to facilitate the sand filling operation;

[0014] After the sand filling operation is completed, turn off the driving motor. Since the output shaft no longer rotates, at this time the first spiral feeding shaft no longer rotates and no longer conveys the molding sand; drive the second hydraulic telescopic rod to drive the mounting plate to move down. When the mounting plate moves down, it drives the elastic tube to stretch. When the mounting plate moves down to a certain position, the roll pressing structure is in extrusion contact with the molding sand. After the roll pressing structure is in extrusion contact with the molding sand, close the discharge port, and the molding sand in the output shaft no longer discharges through the discharge port. At the same time, turn on the driving motor and rely on the rotation of the output shaft to drive the roll pressing structure. When the roll pressing structure rotates, it compresses the molding sand, so as to facilitate the rapid compaction of the molding sand;

[0015] After the molding sand is compacted, the driving motor is turned off. At the same time, the mounting plate is driven by the second hydraulic telescopic rod to reset and move upward. When the mounting plate resets and moves upward, the rolling pressure structure no longer contacts the molding sand by extrusion. At the same time, the discharge port is opened. Since the output shaft no longer rotates, the first spiral feeding shaft no longer rotates and no longer conveys the molding sand, which facilitates the rapid filling of sand and the convenience of compacting the molding sand.

[0016] Specifically, the rolling pressure structure includes a sleeve with an upward opening. A positioning block is fixedly connected to the inner side of the sleeve. A vertical positioning groove that slidably connects with the positioning block is provided on the outer side of the bottom of the output shaft. A return spring is fixedly connected between the lower surface of the output shaft and the inner wall of the sleeve. A plurality of groups of horizontally arranged rotating shafts are fixedly connected to the outer side of the sleeve, and extrusion rollers are rotatably connected to the rotating shafts.

[0017] By adopting the above technical solution, the second hydraulic telescopic rod is driven to drive the mounting plate to move downward. When the mounting plate moves downward, it drives the driving motor and the sleeve to move downward synchronously. After the sleeve moves downward to a certain position, the lower surface of the sleeve contacts and extrudes the upper surface of the molding sand. As the extrusion force gradually increases, the sleeve can be driven to move upward by the extrusion, and the discharge port is closed by relying on the sleeve. At this time, the molding sand no longer discharges through the discharge port. At the same time, the output shaft is relied on to drive the sleeve to rotate. When the sleeve rotates, it drives the rotating shafts to rotate synchronously. When the rotating shafts rotate, they drive the extrusion rollers to roll and contact the surface of the molding sand, and the molding sand is compacted by relying on the extrusion rollers, which facilitates the rapid compaction of the molding sand.

[0018] After the molding sand is compacted, the mounting plate is driven by the second hydraulic telescopic rod to reset and move upward. When the mounting plate resets and moves upward, the extrusion rollers no longer contact the molding sand by extrusion. The return spring is relied on to drive the sleeve to reset and move downward, and no longer block the discharge port, which facilitates the reset movement of the sleeve.

[0019] It should be noted that after the sleeve of the present invention moves downward to a certain position, the sleeve contacts and extrudes the surface of the molding sand. The position where the molding sand contacts the sleeve can be compacted by relying on the sleeve, so as to ensure the compaction effect of the molding sand and facilitate subsequent production operations.

[0020] Specifically, the filtering structure includes a vibrating sieve plate installed inside the housing. The vibrating sieve plate is inclined. An inclined slope is provided inside the housing. The vibrating sieve plate is located above the slope. An inclined discharge pipe is fixedly connected to the outside of the housing. One end of the discharge pipe communicates with the lower part of the slope, and the end of the discharge pipe away from the housing communicates with the feeding structure.

[0021] By adopting the above technical solution, after the cooled hexagonal nuts are taken out, the swing plate is swung by relying on the electric hinge drive. When the swing plate swings, the molding sand on the swing plate and the molding sand in the upper box body fall into the shell body. The used molding sand is screened by relying on the vibrating sieve plate. The qualified molding sand falls on the slope through the vibrating sieve plate, and by relying on the guiding function of the slope, the qualified molding sand is conveyed into the feeding structure through the discharge pipe, and the molding sand is conveyed into the feeding funnel by relying on the feeding structure, so as to facilitate the rapid screening and reuse of the used molding sand.

[0022] Specifically, the feeding structure includes a vertically arranged feeding pipe, a vertically arranged second spiral feeding shaft is arranged in the feeding pipe, an output motor is arranged on the upper surface of the feeding pipe, the upper end of the second spiral feeding shaft is fixedly connected with the output end of the output motor, and the outer side of the upper end of the feeding pipe is communicated with an obliquely arranged discharge pipe, and the discharge pipe is located above the feeding funnel.

[0023] By adopting the above technical solution, after the qualified molding sand enters the feeding pipe, the output motor drives the second spiral feeding shaft to rotate. When the second spiral feeding shaft rotates, the molding sand in the feeding pipe is conveyed and conveyed into the discharge pipe. At the same time, the molding sand is conveyed into the feeding funnel by relying on the discharge pipe, so as to facilitate the screening and reuse of the molding sand.

[0024] Specifically, an obliquely arranged slag discharge pipe communicated with the shell is arranged on the outer side of the shell, and the slag discharge pipe corresponds to the lower part of the vibrating sieve plate.

[0025] By adopting the above technical solution, the used molding sand is vibrationally screened by relying on the vibrating sieve plate. The qualified molding sand that enters the feeding pipe can be reused, and the unqualified molding sand will be discharged into the slag discharge pipe by relying on the obliquely arranged vibrating sieve plate. At the same time, the unqualified molding sand is discharged by relying on the obliquely arranged slag discharge pipe, so as to further improve the screening convenience of the molding sand.

[0026] Specifically, a support rod is fixedly connected to the lower surface of the support frame.

[0027] By adopting the above technical solution, the overall stability of the support frame can be improved by relying on the support rod.

[0028] Specifically, several groups of support nets are fixedly connected to the inner wall of the upper box body.

[0029] By adopting the above technical solution, when filling the upper box body with molding sand, the overall stability of the molding sand in the upper box body can be improved by relying on the support net, and the situation of molding sand collapse can be prevented when driving the upper box body to move upward;

[0030] It should be noted that during the upward or downward movement of the extrusion roller described in the present invention, the extrusion roller is rotated to a suitable position to avoid contact between the extrusion roller and the support mesh.

[0031] Advantages of the present invention:

[0032] (1) For the large-sized hexagonal nut casting equipment described in the present invention, when sand filling operation is required, the driving motor is relied on to drive the output shaft to rotate. When the output shaft rotates, it drives the first spiral feeding shaft to rotate. When the first spiral feeding shaft rotates, it conveys the molding sand in the feeding hopper. The molding sand enters the slot of the output shaft through the elastic tube and the through hole. When the molding sand moves downward in the output shaft to a certain position, the molding sand is discharged from the discharge port and falls on the swing plate, thus facilitating the sand filling operation. There is no need for manual sand filling, improving the production efficiency of hexagonal nuts.

[0033] (2) For the large-sized hexagonal nut casting equipment described in the present invention, after the sand filling operation is completed, the driving motor is turned off. At this time, the first spiral feeding shaft no longer rotates and no longer conveys the molding sand. The second hydraulic telescopic rod is driven to drive the mounting plate to move downward. When the mounting plate moves downward, it drives the elastic tube to stretch. When the mounting plate moves downward to a certain position, the sleeve and the extrusion roller come into extrusion contact with the molding sand. The sleeve is relied on to close the discharge port. At this time, the molding sand no longer discharges through the discharge port. At the same time, the driving motor is turned on, and the extrusion roller is driven by the rotation of the output shaft. When the extrusion roller rotates, it compacts the molding sand, thus facilitating the rapid compaction of the molding sand. There is no need for manual compaction, further improving the production efficiency of hexagonal nuts. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below in conjunction with the drawings and embodiments.

[0035] Figure 1 Is an isometric view of the present invention;

[0036] Figure 2 Is a front view of the present invention;

[0037] Figure 3 Is Figure 2 An enlarged structural schematic diagram of area A of

[0038] Figure 4 Is a structural schematic diagram of the discharge port of the present invention;

[0039] Figure 5 Is a sectional structural schematic diagram of the housing of the present invention;

[0040] Figure 6 Is Figure 5 An enlarged structural schematic diagram of area B of

[0041] Figure 7 Is a structural schematic diagram of the present invention after the extrusion roller moves downward;

[0042] Figure 8 For Figure 7 the enlarged structural schematic diagram of region C;

[0043] Figure 9 is the structural schematic diagram after the swing plate of the present invention swings;

[0044] Figure 10 is the structural schematic diagram when the hexagonal nut mold is placed in the lower box body of the present invention;

[0045] Figure 11 is the top view structural schematic diagram of the support net of the present invention;

[0046] In the figure: 1, housing; 2, lower box body; 3, swing plate; 4, electric hinge; 5, support frame; 6, upper box body; 7, first hydraulic telescopic rod; 8, mounting plate; 9, second hydraulic telescopic rod; 10, drive motor; 11, output shaft; 12, slot; 13, elastic tube; 14, through hole; 15, feed hopper; 16, first spiral feeding shaft; 17, discharge port; 18, sleeve; 19, positioning block; 20, positioning groove; 21, return spring; 22, rotating shaft; 23, extrusion roller; 24, vibrating sieve plate; 25, slope; 26, discharge pipe; 27, feeding pipe; 28, second spiral feeding shaft; 29, output motor; 30, discharge pipe; 31, slag discharge pipe; 32, support rod; 33, support net. Specific embodiments

[0047] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0048] In order to facilitate the rapid sand filling and compaction of the upper box body and the lower box body and improve the production efficiency of hexagonal nuts, as an embodiment of the present invention, as shown in Figure 1 , Figure 2 , Figure 3 shown, a large-size hexagonal nut casting device of the present invention includes a housing 1, the upper part of the housing 1 is communicated with a lower box body 2, two groups of symmetrically arranged swing plates 3 are provided on the upper surface of the housing 1, and both sides of the two groups of swing plates 3 away from each other are hinged to the inner wall of the housing 1 through an electric hinge 4, and the lower box body 2 is located above the two groups of swing plates 3;

[0049] Above the housing 1, there is a horizontally arranged support frame 5. The lower surface of the support frame 5 is provided with an adjustable sand filling structure. The outside of the adjustable sand filling structure is provided with a rolling structure. The lower surface of the support frame 5 is provided with an upper box body 6 corresponding to the lower box body 2. The lower surface of the support frame 5 is fixedly connected with a first hydraulic telescopic rod 7. The telescopic end of the first hydraulic telescopic rod 7 is fixedly connected with the outside of the upper box body 6. The adjustable sand filling structure is located inside the upper box body 6. A filtering structure is arranged inside the housing 1. A feeding structure is arranged outside the housing 1. The lower end of the feeding structure is communicated with the inside of the housing 1. The other end of the feeding structure is located above the adjustable sand filling structure.

[0050] During use, when producing hexagonal nuts, the molding sand is discharged by means of an adjustable sand filling structure and falls onto the upper surface of the swing plate 3 of the housing 1. At this time, the molding sand is located inside the lower box body 2. When the molding sand on the swing plate 3 accumulates to a certain amount, the adjustable sand filling structure is closed, and at this time, the molding sand no longer discharges through the adjustable sand filling structure. At the same time, the adjustable sand filling structure is driven to move downward. When the rolling pressure structure comes into extrusion contact with the molding sand on the swing plate 3, the adjustable sand filling structure is driven, and the rolling pressure structure is driven to rotate by relying on the adjustable sand filling structure. At the same time, due to the extrusion between the rolling pressure structure and the molding sand, the molding sand no longer discharges through the adjustable sand filling structure. When the rolling pressure structure rotates, the molding sand is rolled and compacted. After the rolling compaction is completed, the adjustable sand filling structure is driven to move upward. At this time, the mold for the hexagonal nut is placed on the upper surface of the molding sand, and then the molding sand is discharged again by relying on the adjustable sand filling structure. After a certain amount of molding sand is discharged, at this time, the mold is located inside the molding sand, the adjustable sand filling structure is closed, and at the same time, the adjustable sand filling structure is driven to move downward. When the adjustable sand filling structure moves downward to a certain position, the rolling pressure structure comes into extrusion contact with the molding sand again, and the molding sand is compacted again by relying on the rolling pressure structure. After the molding sand is compacted, the molding sand and the upper surface of the mold are at the same horizontal position. At this time, the adjustable sand filling structure is driven to move upward again. After the adjustable sand filling structure moves upward, parting sand is sprinkled on the upper surfaces of the mold and the molding sand, and the pouring gate mold is placed above the hexagonal nut mold. Then, the upper box body 6 is driven to move downward by relying on the first hydraulic telescopic rod 7 and is in extrusion contact with the upper surface of the lower box body 2. The molding sand is discharged by relying on the adjustable sand filling structure. After a certain amount of molding sand is discharged, the adjustable sand filling structure is driven to move downward, and at the same time, the molding sand is compacted again by relying on the rolling pressure structure. After the molding sand is compacted, the molding sand and the upper part of the pouring gate mold are on the same horizontal plane. The adjustable sand filling structure is driven to move upward, and the upper box body 6 is driven to move upward by relying on the first hydraulic telescopic rod 7. After the upper box body 6 moves upward to a certain position, the hexagonal nut mold and the pouring gate mold are taken out, and the upper box body 6 is driven to move downward again to be in extrusion contact with the lower box body 2. When the pouring gate mold is taken out, the molding sand in the upper box body 6 will form a pouring gate. The liquid metal is transported into the upper box body 6 and the lower box body 2 through the pouring gate. After waiting for natural cooling to be completed, the upper box body 6 is driven to move upward, and then the cooled hexagonal nuts are taken out and subsequent processing is carried out, thereby completing the production of the hexagonal nuts, which is convenient for quickly filling sand and compacting the upper box body 6 and the lower box body 2, without manual repeated sand filling and compaction, improving the production efficiency and production convenience of the hexagonal nuts;

[0051] After the hexagonal nut is taken out, the swing plate 3 is driven to swing by the electric hinge 4. When the swing plate 3 swings, the molding sand on the swing plate 3 falls into the shell 1. At the same time, the molding sand in the upper box 6 is vibrated by a vibration device or manual vibration to make it loose and fall and enter the shell 1. After the molding sand enters the shell 1, the used molding sand is screened by the filtering structure. The qualified molding sand is transported to the adjustable sand filling structure through the feeding structure, so as to quickly screen the used molding sand and reuse it. After the molding sand enters the adjustable sand filling structure, it is convenient to produce the next group of hexagonal nuts.

[0052] It should be pointed out that after the molding sand in the upper box body 6 is compacted and formed, it is necessary to use a hole-opening device to open a vent hole in the molding sand in the upper box body 6; it should also be pointed out that in addition to being formed by a pouring port mold, the pouring port in the upper box body 6 can also be directly opened by a hole-opening device.

[0053] In order to facilitate the sand filling operation, for example, Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the present invention also includes that the adjustable sand filling structure includes a horizontally arranged mounting plate 8, the mounting plate 8 is located below the support frame 5, a second hydraulic telescopic rod 9 is fixedly connected to the lower surface of the support frame 5, and a telescopic end of the second hydraulic telescopic rod 9 is fixedly connected to the upper surface of the mounting plate 8;

[0054] A driving motor 10 is fixedly connected to the lower surface of the mounting plate 8, and a slot 12 opening upward is provided inside the output shaft 11 of the driving motor 10. An elastic tube 13 is fixedly connected between the upper surface of the mounting plate 8 and the lower surface of the support frame 5. A through hole 14 communicating with the lower end of the elastic tube 13 is provided on the mounting plate 8. A feeding funnel 15 is fixedly connected to the upper surface of the support frame 5. The upper end of the elastic tube 13 passes through the support frame 5 and is communicated with the feeding funnel 15. The lower part of the through hole 14 corresponds to the upper end of the output shaft 11, and the through hole 14 is communicated with the inside of the slot 12. A vertically arranged first spiral feeding shaft 16 is provided in the slot 12, and the lower end of the first spiral feeding shaft 16 is fixedly connected to the bottom of the slot 12, and the upper end of the first spiral feeding shaft 16 passes through the elastic tube 13 and is located in the feeding funnel 15. A plurality of groups of inclined discharge ports 17 are distributed on the outer circumference of the lower end of the output shaft 11, and the discharge ports 17 are communicated with the inside of the slot 12.

[0055] The rolling structure is located at the lower end of the output shaft 11 and is slidably connected to the output shaft 11 .

[0056] When in use, when sand filling operation is required, the output shaft 11 is driven to rotate by the driving motor 10, and the output shaft 11 rotates to drive the first spiral feeding shaft 16 to rotate. The first spiral feeding shaft 16 rotates to transport the molding sand in the feeding funnel 15, and the molding sand enters the slot 12 of the output shaft 11 through the elastic tube 13 and the through hole 14. When the molding sand moves down to a certain position in the output shaft 11, the molding sand is discharged from the discharge port 17 and falls on the swing plate 3, so as to facilitate the sand filling operation;

[0057] After the sand filling operation is completed, the driving motor 10 is turned off. Since the output shaft 11 no longer rotates, the first spiral feeding shaft 16 no longer rotates and no longer transports the molding sand. The second hydraulic telescopic rod 9 is driven to drive the mounting plate 8 to move downward. When the mounting plate 8 moves downward, the elastic tube 13 is stretched. When the mounting plate 8 moves downward to a certain position, the roller pressing structure is in compression contact with the molding sand. When the roller pressing structure is in compression contact with the molding sand, the discharge port 17 is closed. The molding sand in the output shaft 11 is no longer discharged through the discharge port 17. At the same time, the driving motor 10 is turned on, and the roller pressing structure is driven by the output shaft 11 to rotate. When the roller pressing structure rotates, the molding sand is compacted, so as to facilitate the rapid compaction of the molding sand.

[0058] After the molding sand is compacted, the drive motor 10 is turned off, and the second hydraulic telescopic rod 9 is used to drive the mounting plate 8 to reset and move upward. When the mounting plate 8 resets and moves upward, the roller pressing structure no longer contacts the molding sand, and the discharge port 17 is opened. Since the output shaft 11 no longer rotates, the first spiral feeding shaft 16 no longer rotates and no longer transports the molding sand, thereby facilitating rapid sand filling and compaction of the molding sand.

[0059] In order to facilitate the rapid compaction of the molding sand, for example, Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the present invention also includes that the rolling structure includes a sleeve 18 with an opening facing upward, a positioning block 19 is fixedly connected to the inner side of the sleeve 18, a vertical positioning groove 20 slidably connected to the positioning block 19 is provided on the outer side of the bottom of the output shaft 11, a return spring 21 is fixedly connected between the lower surface of the output shaft 11 and the inner wall of the sleeve 18, and a plurality of groups of horizontally arranged rotating shafts 22 are fixedly connected to the outer side of the sleeve 18, and an extrusion roller 23 is rotatably connected to the rotating shaft 22.

[0060] During use, the second hydraulic telescopic rod 9 is driven to drive the mounting plate 8 to move downward. When the mounting plate 8 moves downward, it drives the drive motor 10 and the sleeve 18 to move downward synchronously. After the sleeve 18 moves downward to a certain position, the lower surface of the sleeve 18 comes into extrusion contact with the upper surface of the molding sand. As the extrusion force gradually increases, the sleeve 18 can be driven to move upward by extrusion, and the sleeve 18 is relied on to close the discharge port 17. At this time, the molding sand no longer discharges through the discharge port 17. At the same time, the output shaft 11 is relied on to drive the sleeve 18 to rotate. When the sleeve 18 rotates, it drives the rotating shaft 22 to rotate synchronously. When the rotating shaft 22 rotates, it drives the extrusion roller 23 to roll into contact with the surface of the molding sand, and the extrusion roller 23 is relied on to compact the molding sand, so as to facilitate the rapid compaction of the molding sand;

[0061] After the molding sand is compacted, the second hydraulic telescopic rod 9 is relied on to drive the mounting plate 8 to reset and move upward. When the mounting plate 8 resets and moves upward, the extrusion roller 23 no longer comes into extrusion contact with the molding sand. The sleeve 18 is driven by the return spring 21 to reset and move downward, and no longer blocks the discharge port 17, so as to facilitate the driving of the sleeve to reset and move;

[0062] It should be noted that after the sleeve 18 of the present invention moves downward to a certain position, the sleeve 18 comes into extrusion contact with the surface of the molding sand. The sleeve 18 can be relied on to compact the position where the molding sand contacts the sleeve 18, so as to ensure the compaction effect of the molding sand and facilitate subsequent production operations.

[0063] For the convenience of quickly screening the used molding sand, by way of example, such as Figure 1 、 Figure 5 、 Figure 9 As shown, the present invention further includes that the filtering structure includes a vibrating sieve plate 24 installed inside the housing 1. The vibrating sieve plate 24 is inclined. An inclined slope 25 is provided inside the housing 1. The vibrating sieve plate 24 is located above the slope 25. An inclined discharge pipe 26 is fixedly connected to the outside of the housing 1. One end of the discharge pipe 26 communicates with the lower part of the slope 25. The end of the discharge pipe 26 far from the housing 1 communicates with the feeding structure.

[0064] During use, after the cooled hexagonal nuts are taken out, the electric hinge 4 is relied on to drive the swing plate 3 to swing. When the swing plate 3 swings, the molding sand on the swing plate 3 and the molding sand in the upper box body 6 fall into the housing 1. The used molding sand is screened by the vibrating sieve plate 24. The qualified molding sand after screening falls on the slope 25 through the vibrating sieve plate 24, and relying on the guiding action of the slope 25, the qualified molding sand after screening is conveyed into the feeding structure through the discharge pipe 26. The feeding structure is relied on to convey the molding sand into the feeding funnel 15, so as to facilitate the rapid screening and reuse of the used molding sand.

[0065] For the convenience of conveying the molding sand, by way of example, such as Figure 1 、 Figure 5As shown, the present invention further includes that the feeding structure includes a vertically arranged feeding pipe 27, a vertically arranged second spiral feeding shaft 28 is provided inside the feeding pipe 27, an output motor 29 is provided on the upper surface of the feeding pipe 27, the upper end of the second spiral feeding shaft 28 is fixedly connected to the output end of the output motor 29, the outer side of the upper end of the feeding pipe 27 is communicated with an inclined discharge pipe 30, and the discharge pipe 30 is located above the feeding hopper 15.

[0066] During use, after the qualified molding sand is screened and enters the feeding pipe 27, the output motor 29 drives the second spiral feeding shaft 28 to rotate. When the second spiral feeding shaft 28 rotates, it conveys the molding sand in the feeding pipe 27 and conveys it into the discharge pipe 30. At the same time, the discharge pipe 30 is relied on to convey the molding sand into the feeding hopper 15, so as to facilitate the screening and reuse of the molding sand.

[0067] Exemplarily, as Figure 1 shown, the present invention further includes that an inclined slag discharge pipe 31 communicated with the housing 1 is provided on the outer side of the housing 1, and the slag discharge pipe 31 corresponds to the lower part of the vibrating sieve plate 24.

[0068] During use, the vibrating sieve plate 24 is relied on to vibrate and screen the used molding sand. The qualified molding sand that enters the feeding pipe 27 can be reused, and the unqualified molding sand will rely on the inclined vibrating sieve plate 24 to discharge the molding sand into the slag discharge pipe 31. At the same time, the inclined slag discharge pipe 31 is relied on to discharge the unqualified molding sand, so as to further improve the screening convenience of the molding sand.

[0069] Exemplarily, as Figure 1 shown, the present invention further includes that a support rod 32 is fixedly connected to the lower surface of the support frame 5.

[0070] During use, the overall stability of the support frame 5 can be improved by relying on the support rod 32.

[0071] In order to improve the overall stability of the molding sand in the upper box body 6, exemplarily, as Figure 10 、 Figure 11 shown, the present invention further includes that a plurality of groups of support nets 33 are fixedly connected to the inner wall of the upper box body 6.

[0072] During use, when filling the upper box body 6 with molding sand, the overall stability of the molding sand in the upper box body 6 can be improved by relying on the support nets 33, and the situation of the molding sand collapsing when the upper box body 6 is driven to move upward can be prevented;

[0073] It should be noted that during the upward or downward movement of the extrusion roller 23 of the present invention, the extrusion roller 23 is rotated to a suitable position to avoid contact between the extrusion roller 23 and the support net 33.

[0074] When the present invention is in use and sand filling operation is required, the drive motor 10 is relied on to drive the output shaft 11 to rotate. When the output shaft 11 rotates, it drives the first spiral feeding shaft 16 to rotate. When the first spiral feeding shaft 16 rotates, it conveys the molding sand in the feeding hopper 15. The molding sand enters the slot 12 of the output shaft 11 through the elastic tube 13 and the through hole 14. When the molding sand moves down to a certain position in the output shaft 11, the molding sand is discharged from the discharge port 17 and falls on the swing plate 3, so as to facilitate the sand filling operation;

[0075] When the molding sand on the swing plate 3 accumulates to a certain amount and needs to be compacted, the drive motor 10 is turned off. Since the output shaft 11 no longer rotates, at this time the first spiral feeding shaft 16 no longer rotates and no longer conveys the molding sand; the second hydraulic telescopic rod 9 is driven to drive the mounting plate 8 to move down. When the mounting plate 8 moves down, it drives the elastic tube 13 to stretch, and at the same time drives the drive motor 10 and the sleeve 18 to move down synchronously. After the sleeve 18 moves down to a certain position, the lower surface of the sleeve 18 is in extrusion contact with the upper surface of the molding sand. As the extrusion force gradually increases, the sleeve 18 can be driven to move up by extrusion, and the discharge port 17 is closed by relying on the sleeve 18. At this time, the molding sand no longer discharges through the discharge port 17. The drive motor 10 is turned on, and the sleeve 18 is driven to rotate by relying on the output shaft 11. When the sleeve 18 rotates, it drives the rotating shaft 22 to rotate synchronously. When the rotating shaft 22 rotates, it drives the extrusion roller 23 to roll into contact with the surface of the molding sand, and the molding sand is compacted by relying on the extrusion roller 23, so as to facilitate the rapid compaction of the molding sand;

[0076] After the sand is compacted, the drive motor 10 is turned off, and at the same time the mounting plate 8 is driven to reset and move up by relying on the second hydraulic telescopic rod 9. When the mounting plate 8 resets and moves up, the sleeve 18 is no longer in extrusion contact with the molding sand, and at the same time the discharge port 17 is opened. Since the output shaft 11 no longer rotates, at this time the first spiral feeding shaft 16 no longer rotates and no longer conveys the molding sand, so as to facilitate the rapid sand filling and the convenience of compacting the molding sand;

[0077] When the molding sand in the lower box body 2 and the upper box body 6 are both compacted, the liquid metal is conveyed into the upper box body 6 and the lower box body 2 through the reserved casting port. After waiting for natural cooling to be completed, the upper box body 6 is driven to move up, and then the cooled hexagonal nut is taken out and subsequent processing is carried out, so as to complete the production of the hexagonal nut, so as to facilitate the rapid sand filling and compaction of the upper box body 6 and the lower box body 2, without manual repeated sand filling and compaction, improving the production efficiency and production convenience of the hexagonal nut;

[0078] After the hexagonal nut is taken out, the swing plate 3 is driven to swing by the electric hinge 4. When the swing plate 3 swings, the molding sand on the swing plate 3 falls into the housing 1. At the same time, the molding sand in the upper box body 6 is vibrated by using a vibration device or manual vibration to make it loose and fall, and then enter the housing 1. The used molding sand is screened by the vibrating sieve plate 24. The qualified molding sand falls on the slope 25 through the vibrating sieve plate 24, and relying on the guiding action of the slope 25, the qualified molding sand enters the feeding pipe 27 through the discharge pipe 26. The output motor 29 drives the second spiral feeding shaft 28 to rotate. When the second spiral feeding shaft 28 rotates, it conveys the molding sand in the feeding pipe 27 and conveys it into the discharge pipe 30. At the same time, the discharge pipe 30 is used to convey the molding sand into the feeding funnel 15, so as to facilitate the screening and reuse of the molding sand;

[0079] The unqualified molding sand will be discharged into the slag discharge pipe 31 by relying on the inclined vibrating sieve plate 24, and at the same time, the unqualified molding sand is discharged by relying on the inclined slag discharge pipe 31, so as to further improve the convenience of screening the molding sand.

[0080] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A large-size hexagonal nut casting equipment, characterized in that: The invention comprises a shell (1), the upper part of which is connected to a lower box (2), the upper surface of which is provided with two groups of symmetrically arranged swing plates (3), the two sides of the two groups of swing plates (3) being remote from each other are hinged to the inner wall of the shell (1) through an electric hinge (4), and the lower box (2) is located above the two groups of swing plates (3); A horizontally arranged support frame (5) is provided above the shell (1); an adjustable sand filling structure is provided on the lower surface of the support frame (5); a roller pressing structure is provided on the outer side of the adjustable sand filling structure; an upper box body (6) corresponding to the lower box body (2) is provided on the lower surface of the support frame (5); a first hydraulic telescopic rod (7) is fixedly connected to the lower surface of the support frame (5); the telescopic end of the first hydraulic telescopic rod (7) is fixedly connected to the outer side of the upper box body (6); the adjustable sand filling structure is located on the inner side of the upper box body (6); a filtering structure is provided inside the shell (1); a feeding structure is provided on the outer side of the shell (1); the lower end of the feeding structure is communicated with the inside of the shell (1); and the other end of the feeding structure is located above the adjustable sand filling structure; The adjustable sand filling structure comprises a horizontally arranged mounting plate (8), wherein the mounting plate (8) is located below the support frame (5), a second hydraulic telescopic rod (9) is fixedly connected to the lower surface of the support frame (5), and a telescopic end of the second hydraulic telescopic rod (9) is fixedly connected to the upper surface of the mounting plate (8); The lower surface of the mounting plate (8) is fixedly connected to a driving motor (10), an output shaft (11) of the driving motor (10) is internally provided with an opening (12) which opens upwards, an elastic tube (13) is fixedly connected between the upper surface of the mounting plate (8) and the lower surface of the support frame (5), a through hole (14) which is connected to the lower end of the elastic tube (13) is provided on the mounting plate (8), a feeding funnel (15) is fixedly connected to the upper surface of the support frame (5), the upper end of the elastic tube (13) passes through the support frame (5) and is connected to the feeding funnel (15), and the through hole (14) is connected to the lower end of the elastic tube (13). The lower part of the output shaft (14) corresponds to the upper end of the output shaft (11), the through hole (14) is connected to the inside of the slot (12), a vertically arranged first spiral feeding shaft (16) is arranged in the slot (12), the lower end of the first spiral feeding shaft (16) is fixedly connected to the bottom of the slot (12), the upper end of the first spiral feeding shaft (16) passes through the elastic tube (13) and is located in the feeding funnel (15), a plurality of groups of obliquely arranged discharge ports (17) are distributed on the outer circumference of the lower end of the output shaft (11), and the discharge ports (17) are connected to the inside of the slot (12); The rolling structure is located at the lower end of the output shaft (11) and is slidably connected to the output shaft (11); The rolling structure comprises a sleeve (18) with an opening facing upward, a positioning block (19) is fixedly connected to the inner side of the sleeve (18), a vertical positioning groove (20) slidably connected to the positioning block (19) is provided on the outer side of the bottom of the output shaft (11), a return spring (21) is fixedly connected between the lower surface of the output shaft (11) and the inner wall of the sleeve (18), and a plurality of groups of horizontally arranged rotating shafts (22) are fixedly connected to the outer side of the sleeve (18), and a squeezing roller (23) is rotatably connected to the rotating shaft (22).

2. A large-size hexagonal nut casting equipment according to claim 1, characterized in that: The filtering structure comprises a vibrating screen plate (24) installed inside the shell (1), the vibrating screen plate (24) is arranged obliquely, an inclined slope (25) is arranged inside the shell (1), the vibrating screen plate (24) is located above the slope (25), and an inclined discharge pipe (26) is fixedly connected to the outside of the shell (1), one end of the discharge pipe (26) is connected to the lower part of the slope (25), and the end of the discharge pipe (26) away from the shell (1) is connected to the feeding structure.

3. A large-size hexagonal nut casting equipment according to claim 2, characterized in that: The feeding structure comprises a vertically arranged feeding pipe (27), a vertically arranged second spiral feeding shaft (28) is arranged inside the feeding pipe (27), an output motor (29) is arranged on the upper surface of the feeding pipe (27), the upper end of the second spiral feeding shaft (28) is fixedly connected to the output end of the output motor (29), and the outer side of the upper end of the feeding pipe (27) is connected to an inclined discharge pipe (30), and the discharge pipe (30) is located above the feeding funnel (15).

4. A large-size hexagonal nut casting equipment according to claim 3, characterized in that: The outer side of the shell (1) is provided with an inclined slag discharge pipe (31) which is in communication with the shell (1), and the slag discharge pipe (31) corresponds to the lower part of the vibration screen plate (24).

5. A large-size hexagonal nut casting device according to claim 4, characterized in that: The lower surface of the support frame (5) is fixedly connected to a support rod (32).

6. A large-size hexagonal nut casting equipment according to claim 1, characterized in that: A plurality of groups of support nets (33) are fixedly connected to the inner wall of the upper box body (6).

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