Lost foam casting drying equipment

Abstract

The utility model discloses lost foam casting drying equipment. The lost foam casting drying equipment comprises an exhaust hood and a shunting box, according to the lost foam casting drying equipment, an air exhaust cover communicating with a drying box is fixedly installed on the top face of the drying box, a flow dividing box is fixedly installed on the bottom face of the drying box, a circulating fan is fixedly installed at the bottom of the side wall of the drying box, the air outlet end of the circulating fan is fixedly connected with a first connecting pipe, and the air exhaust cover is fixedly connected with a second connecting pipe corresponding to the circulating fan; a third connecting pipe is fixedly connected to the air inlet end of the circulating fan, a dehumidification mechanism is jointly arranged between the end of the third connecting pipe and the end of the second connecting pipe, and the circulating fan is matched with the first connecting pipe, the second connecting pipe, the third connecting pipe, the exhaust hood and the flow dividing box to conduct air circulation in the drying box; in the circulation process, water absorption and dehumidification are conducted through a honeycomb-shaped aluminum oxide drying agent column and an absorbent cotton filling layer in the dehumidification mechanism, air forms external circulation, and the problem that air circulation is poor is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lost foam casting, in particular to a drying device for lost foam casting. Background Technique

[0002] The white mold of lost foam casting refers to the casting model of foam plastic. Generally, it is processed and formed by a molding machine. White molds in small batches or with complex shapes can be processed by numerical control equipment from foam plastic.

[0003] After the lost foam casting white mold is cast and formed, it needs to be dried by a drying device. In related technologies, during drying, a large amount of moisture evaporates into the drying room, and the air humidity in the drying room becomes higher and higher, resulting in a slower and slower drying speed, that is, the drying efficiency is reduced.

[0004] For example, in the patent document with the publication number of CN219511229U, a drying device for lost foam casting white mold is disclosed. It includes an oven. The inner wall of the oven is provided with an installation partition. The two sides of the installation partition are respectively a drying room and a condensation room. A heating pipe is arranged in the drying room, and a condensation mechanism is arranged in the condensation room. An air inlet and an air outlet are opened on the side wall of the condensation room. The air inlet is communicated with an exhaust fan, and the air outlet is communicated with a blower. An installation through groove is opened on the end face of the installation partition, and the installation through groove is communicated with both the drying room and the condensation room. A water collecting bin is communicated with the bottom end of the condensation room. A baffle and a fixing member are arranged in the installation through groove. The baffle has a movable end and a fixed end. The fixed end is closer to the drying room than the movable end. The movable end is rotatably installed on the groove wall of the installation through groove. The baffle is used to limit the air circulation between the drying room and the condensation room. The baffle is provided with a driving device for driving the movable end of the baffle to rotate, and the fixing member is used to fix the baffle. This application has the effect of improving the drying efficiency.

[0005] Although the moisture inside the drying room can be treated in the above-mentioned prior art, however, in the above-mentioned prior art, the drying room and the condensation room are only communicated through the installation through groove. When blowing and sucking air through the exhaust fan and the blower, an air circulation cannot be formed, resulting in poor air fluidity and affecting the moisture treatment efficiency. Therefore, a new drying device for lost foam casting is proposed to optimize the above-mentioned prior art. Content of the Utility Model

[0006] The purpose of the utility model is to provide a drying device for lost foam casting to solve the problems raised in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] A lost foam casting drying device, comprising a drying box, wherein an electric heating plate is fixedly installed on the inner wall of the drying box, an air extraction hood communicated with the drying box is fixedly installed on the top surface of the drying box, a shunt box is fixedly installed on the bottom surface of the drying box, air outlet pipes are uniformly and fixedly connected through the top surface of the shunt box, the air outlet pipes are inserted into the inner side of the bottom of the drying box, a circulating fan is fixedly installed at the bottom of the side wall of the drying box, a first connecting pipe is fixedly connected to the air outlet end of the circulating fan, the first connecting pipe is fixedly connected and communicated with the shunt box, a second connecting pipe is fixedly connected to the air extraction hood corresponding to the circulating fan, and a dehumidification mechanism is jointly arranged between the air inlet end of the circulating fan and the end of the second connecting pipe;

[0009] The dehumidification mechanism comprises symmetrically arranged semi-circular inner pipes and outer sleeves. The two semi-circular inner pipes jointly form a complete circular pipe. The top and bottom ends of the semi-circular inner pipes are respectively sleeved on the ends of the third connecting pipe and the second connecting pipe. Card slots are opened at the joints of the third connecting pipe and the second connecting pipe corresponding to the semi-circular inner pipes. The semi-circular inner pipes are fixedly connected with arc-shaped clamping protrusions corresponding to the card slots. The arc-shaped clamping protrusions are inserted into the card slots and are adapted to the card slots. The outer sleeves are slidably sleeved on the outer sides of the semi-circular inner pipes. Baffles are fixedly connected to the bottom ends of the semi-circular inner pipes. The bottom ends of the outer sleeves fall on the baffles. First placement grooves are jointly opened on the inner sides of the middle parts of the semi-circular inner pipes. Honeycomb-shaped alumina desiccant columns adapted to the first placement grooves are placed in the first placement grooves. Two second placement grooves are jointly and parallelly opened at both ends of the semi-circular inner pipes. Partition net sheets adapted to the second placement grooves are placed in the second placement grooves. A water-absorbing cotton filling layer adapted to the semi-circular inner pipes is jointly placed between the corresponding two partition net sheets.

[0010] As a further scheme of the present utility model: a box door is arranged on the front side of the drying box. One side of the box door is hinged to the drying box through a hinge, and a door lock is arranged between the other side of the box door and the drying box. The door lock adopts an existing commercially available cabinet door lock.

[0011] As a further scheme of the present utility model: linear slide rails are symmetrically and fixedly connected to the inner sides of the top and bottom of the drying box. Linear chutes are slidably connected to the linear slide rails. Mounting frames are jointly fixedly connected to the corresponding linear chutes. First threaded knobs are threadedly connected to both of the bottom two linear chutes. The first threaded knobs are inserted into the linear chutes and abut against the linear slide rails. Threaded holes for threaded connection of the first threaded knobs are opened on the linear chutes.

[0012] As a further scheme of the present utility model: annular slide rails are fixedly connected to the mounting frames. Annular chutes adapted to the annular slide rails are slidably connected to the annular slide rails. Columns are fixedly connected to the annular chutes in a circumferential manner.

[0013] As a further solution of the utility model: a connecting frame is fixedly connected to the inner side of the annular sliding groove at the bottom, a worm gear is fixedly connected to the bottom end of the connecting frame, a worm is arranged on the outer side of the worm gear and meshes with the worm gear for transmission, the worm is rotatably installed on the bottom surface of the mounting frame, a reduction motor is fixedly installed at the rear side of the drying box corresponding to the worm, the output end of the reduction motor is inserted into the drying box and fixedly connected with a key shaft, the key shaft slidably penetrates through the worm, and a key groove for the key shaft to slidably penetrate through is formed in the worm along the axis.

[0014] As a further solution of the utility model: a plurality of placing brackets are arranged between the columns, a connecting sleeve is fixedly connected to the outer circumference of the placing bracket, the connecting sleeve is slidably sleeved on the outer side of the column, a second threaded knob is threadedly connected to the connecting sleeve, one end of the second threaded knob is inserted into the connecting sleeve and abuts against the outer side of the column, and a threaded hole for the second threaded knob to be threadedly connected is formed in the connecting sleeve.

[0015] As a further solution of the utility model: a temperature sensor is also fixedly installed inside the drying box, a controller is fixedly installed on the outer wall of the drying box, the temperature sensor, the electric heating plate, the circulation fan and the reduction motor are all electrically connected to the controller, the control mode is controlled by the controller, and the control circuit of the controller can be realized by simple programming of those skilled in the art, which belongs to the common knowledge in the art.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] 1. The utility model circulates the air inside the drying box through the circulation fan in cooperation with the first connecting pipe, the second connecting pipe, the third connecting pipe, the air extraction hood and the shunt box. During the circulation process, the honeycomb-shaped alumina desiccant column and the water-absorbing cotton filling layer inside the dehumidification mechanism are used for water absorption and dehumidification, so as to avoid the rise of moisture inside the drying box. The air forms an external circulation, effectively avoiding the problem of poor air circulation.

[0018] 2. In the utility model, the water-absorbing cotton filling layer is limited in the combined semi-circular inner pipe through the partition net sheet, the partition net sheet and the honeycomb-shaped alumina desiccant column are assembled and installed in the first placement groove and the second placement groove, the semi-circular inner pipe is combined with the third connecting pipe and the second connecting pipe through the cooperation of the clamping groove and the arc-shaped clamping convex, and the outer sleeve is supported and limited by the baffle, so as to limit the combined semi-circular inner pipe through the outer sleeve, so that the dehumidification mechanism can be conveniently opened and combined, thus facilitating the replacement of the honeycomb-shaped alumina desiccant column and the water-absorbing cotton filling layer.

[0019] 3. The utility model can slide on the linear slide rail through the linear slide groove and be fixed in cooperation with the first threaded knob, so that the placing bracket can be conveniently moved to the outside of the drying box, thus facilitating the placement of the white mold.

[0020] 4. The utility model drives the worm to rotate through the reduction motor cooperating with the key shaft, so that the annular chute can be driven to rotate through the connecting frame, and then the placing bracket can be driven to rotate slowly, facilitating the uniform heating of the white mold placed on the placing bracket.

[0021] 5. In the utility model, the connecting sleeve can slide on the column and then cooperate with the second threaded knob to lock and fix, so that the height of the placing bracket can be adjusted to adapt to the placement of white molds with different heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a lost foam casting drying device.

[0023] Figure 2 It is a bottom-up perspective view of a lost foam casting drying device.

[0024] Figure 3 It is an internal display diagram of a lost foam casting drying device.

[0025] Figure 4 It is an exploded view of the partial structure of a lost foam casting drying device.

[0026] Figure 5 It is an installation display diagram of the placing bracket in a lost foam casting drying device.

[0027] Figure 6 It is a cross-sectional view of a lost foam casting drying device.

[0028] In the figure: 1, drying box; 2, electric heating plate; 3, air extraction hood; 4, shunt box; 5, air outlet pipe; 6, circulation fan; 7, first connecting pipe; 8, second connecting pipe; 9, third connecting pipe; 10, semi-circular inner pipe; 11, outer sleeve pipe; 12, card slot; 13, arc-shaped card convex; 14, baffle; 15, first placement groove; 16, honeycomb-shaped alumina desiccant column; 17, second placement groove; 18, partition net sheet; 19, water-absorbing cotton filling layer; 20, box door; 21, linear slide rail; 22, linear chute; 23, first threaded knob; 24, annular slide rail; 25, annular chute; 26, column; 27, connecting frame; 28, worm gear; 29, worm; 30, reduction motor; 31, key shaft; 32, placing bracket; 33, connecting sleeve; 34, second threaded knob; 35, mounting bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection scope of the present invention.

[0030] Please refer to Figures 1 to 6 , in the embodiment of the present invention, a lost foam casting drying device includes a drying box 1. Legs are provided at the bottom of the drying box 1. An electric heating plate 2 is fixedly installed on the inner wall of the drying box 1. An air extraction hood 3 communicated with the drying box 1 is fixedly installed on the top surface of the drying box 1. A shunt box 4 is fixedly installed on the bottom surface of the drying box 1. Air outlet pipes 5 are uniformly and fixedly connected through the top surface of the shunt box 4. The air outlet pipes 5 are inserted into the inner side of the bottom of the drying box 1. A circulation fan 6 is fixedly installed at the bottom of the side wall of the drying box 1. The air outlet end of the circulation fan 6 is fixedly connected with a first connecting pipe 7. The first connecting pipe 7 is fixedly connected and communicated with the shunt box 4. The air extraction hood 3 is fixedly connected with a second connecting pipe 8 corresponding to the circulation fan 6. The air inlet end of the circulation fan 6 is fixedly connected with a third connecting pipe 9. A dehumidification mechanism is jointly provided between the end of the third connecting pipe 9 and the end of the second connecting pipe 8.

[0031] The dehumidification mechanism includes symmetrically arranged semi-circular inner pipes 10 and outer sleeve pipes 11. The two semi-circular inner pipes 10 together form a complete circular pipe. The top and bottom ends of the semi-circular inner pipes 10 are respectively sleeved on the ends of the third connecting pipe 9 and the second connecting pipe 8. Clamping grooves 12 are opened at the joints of the third connecting pipe 9 and the second connecting pipe 8 corresponding to the semi-circular inner pipes 10. The semi-circular inner pipes 10 are fixedly connected with arc-shaped clamping protrusions 13 corresponding to the clamping grooves 12. The arc-shaped clamping protrusions 13 are inserted into the clamping grooves 12 and are adapted to the clamping grooves 12. The outer sleeve pipes 11 are slidably sleeved on the outer sides of the semi-circular inner pipes 10. Baffles 14 are fixedly connected to the bottom ends of the semi-circular inner pipes 10. The bottom ends of the outer sleeve pipes 11 rest on the baffles 14. First placement grooves 15 are jointly opened on the inner sides of the middle parts of the semi-circular inner pipes 10. Honeycomb-shaped alumina desiccant columns 16 adapted thereto are placed in the first placement grooves 15. Two second placement grooves 17 are jointly and parallelly opened at both ends of the semi-circular inner pipes 10. Partition mesh sheets 18 adapted thereto are placed in the second placement grooves 17. A water-absorbing cotton filling layer 19 adapted to the semi-circular inner pipes 10 is jointly placed between the corresponding two partition mesh sheets 18.

[0032] The air inside the drying box 1 is circulated through the cooperation of the circulation fan 6, the first connecting pipe 7, the second connecting pipe 8, the third connecting pipe 9, the air extraction hood 3 and the shunt box 4. During the circulation process, water absorption and dehumidification are carried out through the honeycomb-shaped alumina desiccant columns 16 and the water-absorbing cotton filling layer 19 inside the dehumidification mechanism, so as to prevent the moisture inside the drying box 1 from rising. The air forms an external circulation, effectively avoiding the problem of poor air circulation.

[0033] The absorbent cotton filling layer 19 is defined within the combined semi-circular inner tube 10 by the partition net sheet 18. The partition net sheet 18 and the honeycomb-shaped alumina desiccant column 16 are assembled and installed within the first placement groove 15 and the second placement groove 17. The semi-circular inner tube 10 is combined with the third connecting tube 9 and the second connecting tube 8 through the cooperation of the card slot 12 and the arc-shaped convex 13, and the outer sleeve 11 is supported and defined by the baffle 14. Thus, the combined semi-circular inner tube 10 is defined by the outer sleeve 11, enabling the dehumidification mechanism to be conveniently opened and combined, and facilitating the replacement of the honeycomb-shaped alumina desiccant column 16 and the absorbent cotton filling layer 19.

[0034] A box door 20 is provided on the front side of the drying box 1. One side of the box door 20 is hinged to the drying box 1 through a hinge, and a door lock is provided between the other side of the box door 20 and the drying box 1. The door lock adopts an existing commercially available cabinet door lock.

[0035] Linear slide rails 21 are symmetrically and fixedly connected to the inner sides of the top and bottom of the drying box 1. Linear slide grooves 22 are slidably connected to the linear slide rails 21. An installation frame 35 is fixedly connected to the corresponding linear slide grooves 22. First threaded knobs 23 are threadedly connected to both of the two linear slide grooves 22 at the bottom. The first threaded knobs 23 are inserted into the linear slide grooves 22 and abut against the linear slide rails 21. Threaded holes for the threaded connection of the first threaded knobs 23 are provided on the linear slide grooves 22.

[0036] The linear slide grooves 22 can slide on the linear slide rails 21 and are fixed in cooperation with the first threaded knobs 23, enabling the placement bracket 32 to be conveniently moved to the outside of the drying box 1, thus facilitating the placement of the white mold.

[0037] Circular slide rails 24 are fixedly connected to the installation frames 35. Circular slide grooves 25 adapted to the circular slide rails 24 are slidably connected to the circular slide rails 24. Columns 26 are fixedly connected to the circular slide grooves 25 in a circumferential manner.

[0038] A connecting frame 27 is fixedly connected to the inner side of the bottom circular slide groove 25. A worm gear 28 is fixedly connected to the bottom end of the connecting frame 27. A worm 29 meshing with the worm gear 28 is provided on the outer side of the worm gear 28. The worm 29 is rotatably installed on the bottom surface of the installation frame 35. A reduction motor 30 is fixedly installed at the rear side of the drying box 1 corresponding to the worm 29. The output end of the reduction motor 30 is inserted into the drying box 1 and fixedly connected to a key shaft 31. The key shaft 31 slidably penetrates through the worm 29. A key groove for the key shaft 31 to slidably penetrate through is provided on the worm 29 along the axis. The key shaft 31 and the worm 29 can slide, enabling synchronous sliding when the linear slide grooves 22 and the linear slide rails 21 slide, and maintaining the connection between the reduction motor 30 and the worm 29.

[0039] The reduction motor 30 drives the worm 29 to rotate in cooperation with the key shaft 31, so that the annular chute 25 can be driven to rotate through the connecting frame 27, and then the placement bracket 32 can be driven to rotate slowly, facilitating the uniform heating of the white mold placed on the placement bracket 32.

[0040] A plurality of placement brackets 32 are provided between the columns 26. A connecting sleeve 33 is fixedly connected to the outer circumference of the placement bracket 32. The connecting sleeve 33 is slidably sleeved on the outer side of the column 26. A second threaded knob 34 is threadedly connected to the connecting sleeve 33. One end of the second threaded knob 34 is inserted into the connecting sleeve 33 and abuts against the outer side of the column 26. A threaded hole for the threaded connection of the second threaded knob 34 is provided on the connecting sleeve 33.

[0041] The connecting sleeve 33 can slide on the column 26 and then cooperate with the second threaded knob 34 to be locked and fixed, so that the height of the placement bracket 32 can be adjusted to adapt to the placement of white molds of different heights.

[0042] A temperature sensor is also fixedly installed inside the drying box 1. A controller is fixedly installed on the outer wall of the drying box 1. The temperature sensor, the electric heating plate 2, the circulation fan 6, and the reduction motor 30 are all electrically connected to the controller. The control method is controlled by the controller. The control circuit of the controller can be realized by simple programming by those skilled in the art and belongs to the common general knowledge in the art.

[0043] The working principle of the present utility model is as follows:

[0044] During use, the placement bracket 32 can be conveniently moved to the outside of the drying box 1 by sliding the linear chute 22 on the linear slide rail 21. At this time, the connecting sleeve 33 can slide on the column 26 and then cooperate with the second threaded knob 34 to be locked and fixed, so that the height of the placement bracket 32 can be adjusted to adapt to the placement of white molds of different heights. Place the white mold to be dried on the placement bracket 32. The placement bracket 32 can be conveniently moved to the inside of the drying box 1 by sliding the linear chute 22 on the linear slide rail 21, and fixed with the first threaded knob 23. Further close the box door 20. At this time, start the temperature sensor, the electric heating plate 2, the circulation fan 6, and the reduction motor 30. The reduction motor 30 drives the worm 29 to rotate in cooperation with the key shaft 31. The worm 29 can drive the worm gear 28, so that the annular chute 25 can be driven to rotate through the connecting frame 27, and then the placement bracket 32 can be driven to rotate slowly, facilitating the uniform heating of the white mold placed on the placement bracket 32. The air inside the drying box 1 is circulated by the circulation fan 6 in cooperation with the first connecting pipe 7, the second connecting pipe 8, the third connecting pipe 9, the air extraction hood 3, and the shunt box 4. During the circulation process, water absorption and dehumidification are carried out through the honeycomb-shaped alumina desiccant column 16 and the water-absorbing cotton filling layer 19 inside the dehumidification mechanism, so as to prevent the humidity from rising inside the drying box 1.

[0045] Lift the outer sleeve 11 until the outer sleeve 11 is separated from the semi-circular inner tube 10. At this time, separate the semi-circular inner tube 10, and then take out and replace the honeycomb-shaped alumina desiccant column 16 and the absorbent cotton filling layer 19. Then, wrap the semi-circular inner tube 10 outside the second connecting tube 8 and the third connecting tube 9 through the cooperation of the arc-shaped convex 13 and the card slot 12. Furthermore, sleeved the outer sleeve 11 outside the semi-circular inner tube 10, so that the outer sleeve 11 lands on the baffle 14 to form a defined installation, and complete the replacement of the honeycomb-shaped alumina desiccant column 16 and the absorbent cotton filling layer 19.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A lost foam casting drying device, comprising a drying box (1), characterized in that: An electric heating plate (2) is fixedly installed on the inner wall of the drying box (1). An air extraction hood (3) communicating with the drying box (1) is fixedly installed on the top surface of the drying box (1). A flow distribution box (4) is fixedly installed on the bottom surface of the drying box (1). The top surface of the flow distribution box (4) is uniformly and fixedly connected through air outlet pipes (5). The air outlet pipes (5) are inserted into the inner side of the bottom of the drying box (1). A circulating fan (6) is fixedly installed at the bottom of the side wall of the drying box (1). The air outlet end of the circulating fan (6) is fixedly connected to a first connecting pipe (7). The first connecting pipe (7) is fixedly connected and communicated with the flow distribution box (4). The air extraction hood (3) is fixedly connected to a second connecting pipe (8) corresponding to the circulating fan (6). A dehumidifying mechanism is jointly arranged between the air inlet end of the circulating fan (6) and the end of the second connecting pipe (8). The dehumidifying mechanism includes semi-circular inner pipes (10) and outer sleeve pipes (11) arranged symmetrically. The two semi-circular inner pipes (10) jointly form a complete circular pipe. The top end and the bottom end of the semi-circular inner pipe (10) are respectively sleeved on the ends of the third connecting pipe (9) and the second connecting pipe (8). Slots (12) are opened at the joints of the third connecting pipe (9) and the second connecting pipe (8) corresponding to the semi-circular inner pipe (10). The semi-circular inner pipe (10) is fixedly connected with arc-shaped clamping protrusions (13) corresponding to the slots (12). The arc-shaped clamping protrusions (13) are inserted into the slots (12) and are adapted to the slots (12). The outer sleeve pipe (11) is slidably sleeved on the outside of the semi-circular inner pipe (10). Baffles (14) are fixedly connected to the bottom ends of the semi-circular inner pipes (10). The bottom end of the outer sleeve pipe (11) rests on the baffle (14). First placement grooves (15) are jointly opened on the inner sides of the middle parts of the semi-circular inner pipes (10). Honeycomb-shaped alumina desiccant columns (16) adapted to the first placement grooves (15) are placed in the first placement grooves (15). Two second placement grooves (17) are jointly and parallelly opened at both ends of the semi-circular inner pipe (10). Partition net sheets (18) adapted to the second placement grooves (17) are placed in the second placement grooves (17). A water-absorbing cotton filling layer (19) adapted to the semi-circular inner pipe (10) is jointly placed between the corresponding two partition net sheets (18).

2. The lost foam casting drying equipment according to claim 1, characterized in that: A box door (20) is arranged on the front side of the drying box (1). One side of the box door (20) is hinged to the drying box (1) through a hinge. A door lock is arranged between the other side of the box door (20) and the drying box (1).

3. The lost foam casting drying equipment according to claim 1, characterized in that: Linear slide rails (21) are symmetrically and fixedly connected to the inner sides of the top and bottom of the drying box (1). Linear sliding grooves (22) are slidably connected to the linear slide rails (21). A mounting frame (35) is jointly fixedly connected to the corresponding linear sliding grooves (22). First threaded knobs (23) are threadedly connected to both of the two linear sliding grooves (22) at the bottom. The first threaded knobs (23) are inserted into the linear sliding grooves (22) and abut against the linear slide rails (21).

4. The lost foam casting drying equipment according to claim 3, wherein: Circular slide rails (24) are fixedly connected to the mounting frames (35). Circular sliding grooves (25) adapted to the circular slide rails (24) are slidably connected to the circular slide rails (24). Columns (26) are fixedly connected to the circular sliding grooves (25) in a circumferential manner.

5. The lost foam casting drying equipment according to claim 4, characterized in that: A connecting frame (27) is fixedly connected to the inner side of the annular sliding groove (25) described at the bottom. The bottom end of the connecting frame (27) is fixedly connected to a worm gear (28). A worm (29) meshing with the worm gear (28) is arranged on the outer side of the worm gear (28). The worm (29) is rotatably installed on the bottom surface of the mounting frame (35). A reduction motor (30) is fixedly installed at the rear side of the drying box (1) corresponding to the worm (29). The output end of the reduction motor (30) is inserted into the drying box (1) and fixedly connected to a key shaft (31). The key shaft (31) slidably penetrates through the worm (29).

6. The lost foam casting drying equipment according to claim 4, characterized in that: A plurality of placing brackets (32) are arranged between the columns (26). A connecting sleeve (33) is fixedly connected to the outer circumference of the placing bracket (32). The connecting sleeve (33) is slidably sleeved on the outer side of the column (26). A second threaded knob (34) is threadedly connected to the connecting sleeve (33). One end of the second threaded knob (34) is inserted into the connecting sleeve (33) and abuts against the outer side of the column (26).

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