Tunnel type lost foam pattern hot air circulation intelligent drying system

Abstract

This invention relates to the field of tunnel-type mold drying technology, and more particularly to a tunnel-type lost foam mold hot air circulation intelligent drying system, comprising a drying chamber, molds, and a support frame. Hot air boxes are installed on both sides of the drying chamber, and the hot air boxes are electrically operated. The interior of the drying chamber has upper and lower workstations arranged vertically. Extension frames are fixedly installed at both ends of the drying chamber, and the surfaces of the extension frames are equipped with lifting mechanisms for hoisting the molds. A lifting platform for raising and lowering the molds and support frame is installed between the extension frames and the drying chamber. This invention, by incorporating a transmission device, lifting platform, and hoisting mechanism, enables automatic conveying and lifting of the molds, allowing them to be automatically fed into the drying chamber. After drying for the predetermined time, the molds are orderly removed via the lifting platform at the exit end, reducing the labor intensity of frontline workers and eliminating the need for transfer equipment, thus simplifying the work process.

Description

Technical Field

[0001] This invention relates to the field of tunnel mold drying technology, and in particular to a tunnel lost mold hot air circulation intelligent drying system. Background Technology

[0002] Currently, the raw materials used for lost foam casting patterns are mainly EPS (expandable polystyrene). The main production process is as follows: raw materials (EPS) – pattern production (machining) – coating (drying) – molding – pouring (melting and cooling) – cleaning – inspection – warehousing – logistics (outsourcing). After the pattern is produced, a coating process is required, which involves coating (or spraying) a layer of water-based high-temperature resistant material onto the surface of the pattern and then drying it. In this process, the pattern coating (drying) operation is critical, and the corresponding drying system is the key equipment for this process. The quality of the equipment directly affects the drying effect of the pattern and, more importantly, the quality of the casting.

[0003] The current gas-fired drying equipment works by using the heat generated from burning natural gas to enter the drying chamber through the air outlet, where the air is heated by gravity flow. However, the combustion of gas is incomplete and the heat is unstable. Furthermore, the transfer equipment for entering and exiting the gas-fired drying chamber is large and heavy, making it extremely inconvenient for employees to manually push it. The space inside the drying chamber is also limited, which affects the drying efficiency of the products. Summary of the Invention

[0004] The purpose of this invention is to provide a tunnel-type lost foam pattern hot air circulation intelligent drying system, which solves the problems of insufficient drying and unstable heat when using gas combustion in the prior art. Furthermore, the large and cumbersome transfer equipment for entering and exiting the gas drying chamber makes it extremely inconvenient for employees to manually push it. The limited space inside the drying chamber also affects the drying efficiency of the pattern.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a tunnel-type lost mold hot air circulation intelligent drying system, comprising a drying chamber, a mold, and a support frame. Hot air boxes are installed on both sides of the drying chamber, and the hot air boxes employ electric drying. The drying chamber has an upper workstation and a lower workstation arranged vertically. Extension frames are fixedly installed at both ends of the drying chamber. The surface of the extension frames is provided with a lifting mechanism for hoisting the mold. A lifting platform for raising and lowering the mold and the support frame is provided between the extension frames and the drying chamber. Both the upper and lower workstations inside the drying chamber are equipped with transmission devices for driving the support frame.

[0006] Preferably, the hoisting mechanism includes a second trolley, a hoisting hoist, and a gantry frame. The second trolley is mounted on the surface of the extension frame, the hoisting hoist is mounted on the surface of the second trolley, and a hoisting cable is provided on the surface of the hoisting hoist. The gantry frame is mounted on the bottom end of the hoisting cable. Both arms of the gantry frame have L-shaped load-bearing plates that slide through them near their bottom ends. Both arms of the gantry frame have drive motors fixedly installed inside them. The output shaft ports of the drive motors have drive gears fixedly installed. Both arms of the gantry frame have driven gears that are rotatably connected inside them. The drive gears and driven gears mesh. Both arms of the gantry frame have screws that pass through them. The ends of the screws are fixedly connected to the load-bearing plates, and the screws are threadedly connected to the driven gears.

[0007] Preferably, the lifting platform includes a base plate, and four cylinders are fixedly installed on the surface of the base plate, with a support plate fixedly installed at the output end of the four cylinders.

[0008] Preferably, the transmission device includes a top plate, with a first traveling crane fixedly installed at both ends of the top of the top plate. The top plate moves automatically inside the drying chamber via the first traveling crane. Four hydraulic cylinders are fixedly installed at the bottom of the top plate. Fixed blocks are fixedly installed at the output ports of the hydraulic cylinders. Notches are provided at the bottom of the fixed blocks. Electric telescopic rods are fixedly installed inside the fixed blocks. Insert rods are fixedly installed at the output ports of the electric telescopic rods. Protrusions are welded to the top of the bracket near the four corners, and the surfaces of the protrusions have insertion holes that match the size of the insert rods.

[0009] Preferably, the bottom of the bracket is fixedly installed with four pads, the center of the surface of the bracket is provided with a long groove for the bottom end of the gantry frame to pass through, the bottom walls of the upper and lower workstations are provided with positioning holes that match the size of the pads, and the surface of the pallet is fixedly installed with four positioning sleeves that match the size of the pads.

[0010] Preferably, the inner wall of the extension rack and the inner wall of the drying chamber are both provided with a first slide rail for the first traveling trolley to run, and the inner wall of the extension rack is provided with a second slide rail for the second traveling trolley to run.

[0011] Preferably, the hot air box is rotatably connected to a diverter plate for adjusting the air direction, and the side wall of the drying chamber is provided with an air outlet for hot air to enter relative to the position of the hot air box.

[0012] Preferably, a digital intelligent display is fixedly installed on the side wall of the drying room.

[0013] Preferably, both ends of the drying room are equipped with doors, and the inner and outer walls of the drying room and the doors are made of rock wool insulation boards.

[0014] Preferably, the drying chamber is equipped with a temperature control module and a temperature measurement module.

[0015] The present invention has at least the following beneficial effects: 1. By setting up a transmission device, a lifting platform and a hoisting mechanism, the mold can be automatically conveyed and lifted, so that the mold is automatically sent into the drying room. After the mold is dried for a specified time, it is orderly removed through the lifting platform at the exit end, which reduces the labor intensity of front-line workers and eliminates the need for transfer equipment, thus simplifying the work.

[0016] 2. By changing the original gas-fired drying to electric drying, the drying process becomes cheaper and more economical. Moreover, it greatly reduces pollution compared to traditional gas-fired drying, meeting current and future needs while creating a better working environment for employees.

[0017] 3. When the gantry in the hoisting mechanism hoists the mold, it can cooperate with the bracket to facilitate automatic unloading without manual operation, making it convenient to use and reducing the safety hazards caused by manual operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a cross-sectional view of the drying room of the present invention;

[0021] Figure 3 This is a schematic diagram of the extension frame structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the cylinder structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the hoisting mechanism of the present invention;

[0024] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at point A in the middle;

[0025] Figure 7 This is a schematic diagram of the positioning sleeve structure of the present invention;

[0026] Figure 8 This is a schematic diagram of the internal structure of the drying room of the present invention;

[0027] Figure 9This is a schematic diagram of the transmission device structure of the present invention;

[0028] Figure 10 This is a cross-sectional view of the fixing block of the present invention.

[0029] In the diagram: 1. Drying room; 2. Digital intelligent display; 3. Extension rack; 4. Hot air box; 41. Diverter plate; 5. Door; 6. Lifting platform; 61. Base plate; 62. Cylinder; 63. Support plate; 64. Positioning sleeve; 7. Air outlet; 8. Mold; 9. Bracket; 10. Foot pad; 11. First slide rail; 12. Second slide rail; 13. Upper station; 14. Lower station; 15. Positioning hole; 16. Transmission device; 161. Top plate; 162. First crane; 163. Hydraulic cylinder; 164. Fixing block; 165. Electric telescopic rod; 166. Insert rod; 17. Lifting mechanism; 171. Gantry frame; 172. Load-bearing plate; 173. Driven gear; 174. Screw; 175. Drive motor; 176. Drive gear; 177. Second crane; 178. Lifting hoist. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0032] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0034] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0035] Reference Figure 1-10 A tunnel-type lost mold hot air circulation intelligent drying system includes a drying chamber 1, a mold 8, and a support 9. Hot air boxes 4 are installed on both sides of the drying chamber 1, and the hot air boxes 4 use electric drying. The drying chamber 1 has an upper station 13 and a lower station 14 arranged vertically. Extension frames 3 are fixedly installed at both ends of the drying chamber 1. The surface of the extension frames 3 is equipped with a lifting mechanism 17 for hoisting the mold 8. A lifting platform 6 is installed between the extension frames 3 and the drying chamber 1 for raising and lowering the mold 8 and the support 9. Both the upper station 13 and the lower station 14 inside the drying chamber 1 are equipped with transmission devices 16 for driving the support 9. In use, the mold 8 is first hoisted onto the lifting platform 6 using the lifting mechanism 17. At this time, the support 9 is placed on the lifting platform 6. The bracket 9 and mold 8 are lifted to a suitable height by the lifting platform 6, so that they can be adapted to the transmission device 16 of the upper station 13 or the transmission device 16 of the lower station 14. Then, the transmission device 16 is used to transport the entire bracket 9 and mold 8 into the drying room 1. After the mold 8 is dried for the agreed time, it is orderly exited through the lifting platform 6 at the exit end. During drying, hot air is provided by the drying box, which is electrically heated and centrally heated by the air source hot air furnace with intelligent control. Its main advantages are uniform heating, high thermal efficiency, low energy consumption, low noise, and integration of heating and dehumidification. Then, the hot air is blown into the interior of the drying room 1. Compared with the transmission and gas-fired drying, it is more economical and environmentally friendly, meets current and future needs, and creates a good working environment for employees.

[0036] Furthermore, the hoisting mechanism 17 includes a second trolley 177, a hoisting hoist 178, and a gantry frame 171. The second trolley 177 is mounted on the surface of the extension frame 3, and the hoisting hoist 178 is mounted on the surface of the second trolley 177. A hoisting cable is provided on the surface of the hoisting hoist 178. The gantry frame 171 is mounted at the bottom end of the hoisting cable. An "L"-shaped load-bearing plate 172 slides through both arms of the gantry frame 171 near the bottom. A drive motor 175 is fixedly installed inside both arms of the gantry frame 171. A drive gear 176 is fixedly installed at the output shaft port of the drive motor 175. A driven gear 173 is rotatably connected inside both arms of the gantry frame 171. The drive gear 176 and the driven gear 173 mesh. A screw 174 passes through both arms of the gantry frame 171. The end of the screw 174 is fixedly connected to the load-bearing plate 172. The screw 174 and the driven gear... The 173 threaded connection and the hoisting mechanism 17 are used in operation. First, the hoisting hoist 178 is used to lower the gantry frame 171 to the lowest position. Then, the motors of the two arms are started. The motors drive the drive gear 176 to rotate, and the drive gear 176 drives the driven gear 173 to rotate. The rotation of the driven gear 173 drives the screw 174 and the load-bearing plate 172 to move, so that the distance between the two load-bearing plates 172 can lift the mold 8 from the bottom. Then, the mold 8 is placed on the two load-bearing plates 172. The hoisting hoist 178 is started again to lift the mold 8 and the gantry frame 171. Then, the second trolley 177 is used to move the mold 8 and the bracket 9 to the top of the lifting platform 6. The lifting platform 6 is used to lift the whole thing, so that it can be automatically transported by the transmission device 16. The load-bearing plate 172 can move, so as to accommodate molds 8 of different sizes.

[0037] Furthermore, the lifting platform 6 includes a base plate 61, on which four cylinders 62 are fixedly installed. The output ports of the four cylinders 62 are fixedly installed with a support plate 63. During use, the lifting platform 6 directly starts the cylinders 62, which drive the support plate 63 to move vertically, thereby driving the mold 8 and the bracket 9 above to adjust their height.

[0038] Furthermore, the transmission device 16 includes a top plate 161, with first traveling carriages 162 fixedly installed on the top of the top plate 161 near both ends. The top plate 161 moves automatically inside the drying chamber 1 via the first traveling carriages 162. Four hydraulic cylinders 163 are fixedly installed on the bottom of the top plate 161. Fixed blocks 164 are fixedly installed at the output ports of the hydraulic cylinders 163. The bottom of the fixed blocks 164 has a notch. An electric telescopic rod 165 is fixedly installed inside the fixed blocks 164. Inserted rods 166 are fixedly installed at the output ports of the electric telescopic rods 165. Protrusions are welded to the top of the bracket 9 near the four corners, and the surface of the protrusions has insertion holes that match the size of the inserted rods 166. The transmission device 16... In use, the first trolley 162 moves the top plate 161 to the extension frame 3, which is directly above the lifting platform 6. At this time, the hydraulic cylinder 163 is activated, which moves the four fixed blocks 164 downward, so that the fixed blocks 164 move onto the four protrusions of the bracket 9, and the notch of the fixed block 164 is aligned with the protrusion. Then, the electric telescopic rod 165 is activated, which moves the insertion rod 166, so that the insertion rod 166 passes through the insertion hole on the surface of the fixed block 164. The hydraulic cylinder 163 is activated to lift the entire bracket 9 upward. Then, the first trolley 162 is used again to move it into the drying room 1. Similarly, the dried mold 8 and the bracket 9 are transported out together, thus realizing the transmission.

[0039] Furthermore, four feet 10 are fixedly installed at the bottom of the bracket 9. A long groove for the bottom end of the gantry frame 171 to pass through is opened at the center of the surface of the bracket 9. The bottom walls of the upper station 13 and the lower station 14 are both provided with positioning holes 15 that are adapted to the size of the feet 10. Four positioning sleeves 64 that are adapted to the size of the feet 10 are fixedly installed on the surface of the pallet 63. The feet 10 are provided at the bottom of the bracket 9, and the positioning sleeves 64 are provided on the surface of the pallet 63. When the mold 8 and the bracket 9 are hoisted to the lifting platform 6 by the hoisting mechanism 17, the feet 10 at the bottom of the bracket 9 are inserted into the positioning sleeves 64, so that the bottom of the bracket 9 and the pallet 63 are aligned. A certain distance is reserved at the top of 63 so that after being hoisted onto the pallet 63 by the hoisting mechanism 17, two motors are started. The two motors drive two drive gears 176 to rotate. The drive gears 176 drive the driven gears 173 to rotate, thereby driving the screw 174 and the load-bearing plate 172 to move away from each other, so that the hoisting mechanism 17 can be automatically detached. Positioning holes 15 are provided on both the upper station 13 and the lower station 14 so that the bracket 9 is placed on the positioning holes 15, and the position of each bracket 9 is determined. Therefore, when the controller controls the transmission device 16 to transmit the bracket 9, the positioning is more accurate.

[0040] Furthermore, the inner wall of the extension rack 3 and the inner wall of the drying chamber 1 are both provided with a first slide rail 11 for the first traveling crane 162 to run, and the inner wall of the extension rack 3 is provided with a second slide rail 12 for the second traveling crane 177 to run.

[0041] Furthermore, the hot air box 4 is rotatably connected to a diverter plate 41 for adjusting the air direction, and the side wall of the drying room 1 is provided with an air inlet 7 for supplying hot air relative to the position of the hot air box 4.

[0042] Furthermore, a digital intelligent display 2 is fixedly installed on the side wall of the drying room 1. By setting up the digital intelligent display 2 and installing a controller inside, it is convenient to achieve the purpose of automating all steps.

[0043] Furthermore, both ends of the drying room 1 are equipped with doors 5. The inner and outer walls of the drying room 1 and the doors 5 are made of rock wool insulation boards. The doors 5 are garage door type lifting doors, which are automatic lifting doors to reduce heat leakage during drying.

[0044] Furthermore, the drying chamber 1 is equipped with a temperature control module and a temperature measurement module.

[0045] In summary, during operation, the mold 8 is first hoisted onto the lifting platform 6 using the hoisting mechanism 17. A bracket 9 is placed on the lifting platform 6. The lifting platform 6 then lifts the bracket 9 and mold 8 to a suitable height, adapting them to the transmission device 16 of the upper station 13 or the transmission device 16 of the lower station 14. Next, the transmission device 16 transports the entire bracket 9 and mold 8 into the drying chamber 1. After the mold 8 has dried for the designated time, it exits the drying chamber through the lifting platform 6 at the outlet. During drying, a drying chamber provides hot air, which is electrically heated. The air-source heat pump furnace provides centralized heating and intelligent control. Its main advantages are uniform heating, high thermal efficiency, low energy consumption, low noise, and integrated heating and dehumidification. The hot air is then blown into the drying chamber 1. Compared to traditional gas-fired drying, this method is more economical and environmentally friendly, meeting current and future needs while creating a better working environment for employees. In operation, the hoisting mechanism 17 first uses the hoisting hoist 178 to lower the gantry frame 171 to its lowest position. Then, the motors on both arms are started, driving the drive gear 176 to rotate. The drive gear 176 then drives the driven gear 173 to rotate, which in turn drives the screw 174 and the load-bearing plate 172 to move. This distance between the two load-bearing plates 172 allows the mold 8 to be lifted from the bottom. The mold 8 is then placed on the two load-bearing plates 172. The hoisting hoist 178 is started again to lift the mold 8 and the gantry frame 171. The second trolley 177 is then used to move the mold 8 and the load-bearing plate 171. The bracket 9 moves above the lifting platform 6, which then lifts the entire structure, facilitating automatic transport via the transmission device 16. The load-bearing plate 172 is movable to accommodate molds 8 of different sizes. During operation, the lifting platform 6 directly activates the cylinder 62, which moves the support plate 63 vertically, thereby adjusting the height of the mold 8 and bracket 9. During operation, the transmission device 16 uses the first trolley 162 to move the top plate 161 onto the extension frame 3, directly above the lifting platform 6. At this point, the hydraulic cylinder 163 is activated, causing the four fixing blocks 164 to move downwards, aligning them with the four protrusions on the bracket 9, ensuring the notches of the fixing blocks 164 are aligned with the protrusions. Then, the electric telescopic rod 165 is activated, which drives the insertion rod 166 to move. The insertion rod 166 then passes through the insertion hole on the surface of the fixing block 164. The hydraulic cylinder 163 is then activated to lift the entire bracket 9 upwards. The first trolley 162 then moves it back into the drying chamber 1. Similarly, the dried mold 8 and bracket 9 are transported out together, thus achieving transmission. A foot pad 10 is provided at the bottom of the bracket 9, and a positioning sleeve 64 is provided on the surface of the pallet 63. When the mold 8 and bracket 9 are lifted onto the lifting platform 6 using the hoisting mechanism 17, the foot pad 10 at the bottom of the bracket 9 is inserted into the positioning sleeve 64, leaving a certain distance between the bottom of the bracket 9 and the top of the pallet 63. This allows for proper lifting after the bracket 8 is lifted onto the pallet 63 using the hoisting mechanism 17.Two motors are started, each driving a drive gear 176 to rotate. The drive gear 176 drives the driven gear 173 to rotate, thereby driving the screw 174 and the load-bearing plate 172 to move away from each other, facilitating the automatic detachment of the hoisting mechanism 17. Positioning holes 15 are provided on both the upper station 13 and the lower station 14, allowing the brackets 9 to be placed in the positioning holes 15, thus determining the position of each bracket 9. Therefore, when the transmission device 16 is controlled by the controller to drive the brackets 9, the positioning is more accurate. A digital intelligent display 2 with an internal controller facilitates automated control of all steps. The door 5 adopts a garage door-style lifting mechanism, automatically lifting up and down to reduce heat leakage during drying. A high-temperature resistant, non-toxic silicone rubber sealing ring is used between the door 5 and the drying chamber 1, providing excellent sealing performance.

[0046] The foregoing has shown and described 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 to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A tunnel-type lost mold pattern hot air circulation intelligent drying system, characterized in that, The equipment includes a drying room (1), a mold (8), and a bracket (9). Hot air boxes (4) are provided on both sides of the drying room (1). The hot air boxes (4) are electrically dried. The drying room (1) has an upper station (13) and a lower station (14) arranged vertically. An extension frame (3) is fixedly installed at both ends of the drying room (1). The surface of the extension frame (3) is provided with a hoisting mechanism (17) for hoisting the mold (8). A lifting platform (6) for lifting the mold (8) and the bracket (9) is provided between the extension frame (3) and the drying room (1). The upper station (13) and the lower station (14) inside the drying room (1) are provided with a transmission device (16) for driving the bracket (9). The hoisting mechanism (17) includes a second trolley (177), a hoisting hoist (178), and a gantry crane (171). The second trolley (177) is mounted on the surface of the extension frame (3). The hoisting hoist (178) is mounted on the surface of the second trolley (177). A hoisting cable is provided on the surface of the hoisting hoist (178). The gantry crane (171) is mounted on the bottom end of the hoisting cable. Both arms of the gantry crane (171) have L-shaped load-bearing plates (172) that slide through them near the bottom. 71) Both arms are fixedly installed with drive motors (175), and the output shaft port of the drive motors (175) is fixedly installed with drive gears (176). Both arms of the gantry frame (171) are rotatably connected with driven gears (173). The drive gears (176) and driven gears (173) mesh. Both arms of the gantry frame (171) are connected with screws (174). The end of the screws (174) is fixedly connected to the load-bearing plate (172). The screws (174) and driven gears (173) are threadedly connected. The lifting platform (6) includes a base plate (61), and four cylinders (62) are fixedly installed on the surface of the base plate (61). The output ports of the four cylinders (62) are fixedly installed with a support plate (63). The transmission device (16) includes a top plate (161). A first traveling carriage (162) is fixedly installed on the top of the top plate (161) near both ends. The top plate (161) moves automatically inside the drying room (1) via the first traveling carriage (162). Four hydraulic cylinders (163) are fixedly installed at the bottom of the top plate (161). A fixing block (164) is fixedly installed at the output port of the hydraulic cylinder (163). A notch is opened at the bottom of the fixing block (164). An electric telescopic rod (165) is fixedly installed inside the fixing block (164). A plug rod (166) is fixedly installed at the output port of the electric telescopic rod (165). A protrusion is welded on the top of the bracket (9) near the four corners. The surface of the protrusion has a plug hole that matches the size of the plug rod (166). The inner wall of the extension rack (3) and the inner wall of the drying room (1) are provided with a first slide rail (11) for the first traveling trolley (162) to run, and the inner wall of the extension rack (3) is provided with a second slide rail (12) for the second traveling trolley (177) to run.

2. The tunnel-type lost foam pattern hot air circulation intelligent drying system according to claim 1, characterized in that, The bottom of the bracket (9) is fixedly installed with four pads (10). The center of the surface of the bracket (9) is provided with a long groove for the bottom end of the gantry (171) to pass through. The bottom walls of the upper station (13) and the lower station (14) are provided with positioning holes (15) that are adapted to the size of the pads (10). The surface of the pallet (63) is fixedly installed with four positioning sleeves (64) that are adapted to the size of the pads (10).

3. The tunnel-type lost mold pattern hot air circulation intelligent drying system according to claim 1, characterized in that, The hot air box (4) is rotatably connected to a diverter plate (41) for adjusting the air direction, and the side wall of the drying room (1) is provided with an air inlet (7) for supplying hot air relative to the hot air box (4).

4. The tunnel-type lost mold pattern hot air circulation intelligent drying system according to claim 1, characterized in that, A digital intelligent display (2) is fixedly installed on the side wall of the drying room (1).

5. The tunnel-type lost mold pattern hot air circulation intelligent drying system according to claim 1, characterized in that, Both ends of the drying room (1) are equipped with door (5), and the inner and outer walls of the drying room (1) and the door (5) are made of rock wool insulation board.

6. The tunnel-type lost mold pattern hot air circulation intelligent drying system according to claim 1, characterized in that, The drying room (1) is equipped with a temperature control module and a temperature measurement module.

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