An expendable pattern casting machine

Abstract

The application belongs to the field of intelligent foundry island, and particularly relates to a lost foam casting machine, which comprises a drying box, a closed switch door is hingedly connected to the side wall of the drying box, a lifting cylinder is fixedly connected to the bottom of the drying box, a placing table is fixedly connected to the output end of the lifting cylinder, a plurality of supporting telescopic rods are fixedly connected between the placing table and the bottom of the inner side wall of the drying box, a pair of connecting plates are symmetrically fixed to the inner side wall of the drying box, a plurality of connecting assemblies are arranged on the connecting plates, supporting ropes are arranged between the connecting assemblies, the supporting ropes are located above the placing table, a first air pipe is fixedly connected to the side wall of the drying box, the lost foam is supported by the plurality of supporting ropes, and the lost foam is dried by circulating hot air flow, so that the drying dead angle is reduced, the lost foam surface coating is more fully dried, the supporting ropes are made of strong nylon ropes, the stable supporting effect is achieved, and the strong and high-temperature-resistant effect is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of smart casting islands, in particular to a lost foam casting machine. Background Art

[0002] The smart casting island is the product of the intelligent and automated development of the foundry industry, realizing the intelligent management of casting production, among which the lost foam technology is one of the products.

[0003] Lost foam casting is an advanced casting process. Lost foam casting, also known as full mold casting, uses foam plastic (such as EPS, STMMA or EPMMA) to make a full mold that is exactly the same as the part structure and size. After being dipped in refractory coating and dried, it is buried in dry sand and vibrated to shape. Then, molten metal is poured into it under negative pressure. The foam plastic model is heated and vaporized, and then replaced by liquid metal. After cooling and solidification, it forms a new casting method. Castings manufactured by the lost foam casting process have the advantages of good quality, low cost, environmental protection and great design freedom.

[0004] When the existing lost foam casting device dries the lost foam, the lost foam usually needs to be placed on a placement seat. The contact area between the bottom of the lost foam and the placement seat is large, making it difficult to dry the bottom of the lost foam, resulting in damage to subsequent castings.

[0005] To this end, the present invention provides a lost foam casting machine. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: the lost foam casting machine described in the present invention includes a drying box; the side wall of the drying box is hinged with a sealed switch door; the bottom of the drying box is fixedly connected to a lifting cylinder; the output end of the lifting cylinder is fixedly connected to a placement table; a plurality of supporting telescopic rods are fixedly connected between the placement table and the bottom of the inner wall of the drying box; a pair of connecting plates are symmetrically fixed to the inner wall of the drying box; a plurality of connecting components are provided on the connecting plate; a support rope is installed between the connecting components; the support rope is located above the placement table; a first air duct is fixedly connected to the side wall of the drying box; a second air duct is fixedly connected to the side wall of the drying box; a fan is installed in the middle of the second air duct; a dehumidification component is fixedly connected between the first air duct and the second air duct; a heater is installed inside the second air duct. The above structure can reduce drying dead corners and make the lost foam surface coating dry more fully.

[0008] Preferably, a slide groove is provided on the top of the connecting plate; a slider is slidably connected inside the slide groove; an anti-slip damper is installed between the slider and the slide groove; a connecting frame is fixedly connected to the end of the slider; a plurality of protective ropes are fixedly connected to the middle of the connecting frame; the protective ropes are arranged in an array; a moving handle is fixedly connected to the top of the slider, and the above structure improves the stability of the lost foam during the drying process.

[0009] Preferably, the connecting assembly includes a rotating rod and a fixed block; the rotating rod is rotatably connected to the side wall of the connecting plate; the fixed block is fixed to the end of the rotating rod; a chain transmission assembly is installed between a pair of adjacent rotating rods; one of the ends of the rotating rods is fixedly connected to a transmission rod; a pair of driving motors are fixedly connected to the side wall of the drying box; the output end of the driving motor is fixedly connected to a first synchronous wheel; the end of the transmission rod passes through the side wall of the drying box and is rotatably connected to the drying box; the end of the transmission rod is fixedly connected to a second synchronous wheel; a synchronous belt is installed between the second synchronous wheel and the first synchronous wheel. The above structure improves the full drying effect of the lost foam.

[0010] Preferably, a pair of tension adjustment plates are hinged on the side walls of the fixed block; the tension adjustment plates are arc-shaped; a torsion spring is installed at the hinge between the tension adjustment plates and the fixed block; the ends of the tension adjustment plates and the surface of the support rope are in contact with each other, and through the above structure, the support rope supports the lost foam more stably.

[0011] Preferably, a limiting groove is provided at the end of the tension adjustment plate, and the above structure improves the matching stability between the support rope and the tension adjustment plate.

[0012] Preferably, an anti-wear block is fixed inside the limiting groove, and the service life of the support rope is improved through the above structure.

[0013] Preferably, a pair of slots are opened in the middle of the fixing block; a block is slidably connected inside the slot; a pair of fixing holes are opened in the middle of the fixing block; the end of the support rope is placed inside the fixing hole. The above structure makes the replacement of the support rope more convenient and quick.

[0014] Preferably, the dehumidification component includes a dehumidification box; the first air duct, the second air duct and the dehumidification box are connected to each other; the end of the second air duct is located above the end of the first air duct; a pair of fixing rods are fixed to the side wall of the drying box; the ends of the fixing rods are fixed to the side wall of the dehumidification box; a waterproof and breathable membrane is fixed to the inside of the dehumidification box; a heat exchange tube is installed inside the dehumidification box; the heat exchange tube is located below the waterproof and breathable membrane. The above structure reduces humid air in the drying process, thereby improving the drying effect and safety.

[0015] Preferably, a telescopic cylinder is fixedly connected to the side wall of the dehumidification box; a scraper is fixedly connected to the output end of the telescopic cylinder; the scraper is sleeved on the middle part of the heat exchange tube and is in contact with the surface of the heat exchange tube. The above structure improves the dehumidification effect of the heat exchange tube on the air.

[0016] Preferably, an observation window is provided on the side wall of the dehumidification box; the observation window is made of a transparent material, and the above structure reduces the problem of excessive moisture accumulation inside the dehumidification box leading to reduced dehumidification effect.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The lost foam casting machine described in the present invention supports the lost foam by using multiple support ropes and then dries the lost foam by circulating hot air flow, which can reduce drying dead corners and make the surface coating of the lost foam dry more fully.

[0019] 2. The lost foam casting machine described in the present invention can fully dry the contact surface between the original support ropes and the lost foam by alternately exchanging the support ropes supporting the lost foam. By allowing all parts of the surface coating of the lost foam to come into contact with hot air and be dried, the full drying effect of the lost foam is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a perspective view of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the drying box in the present invention;

[0023] Figure 3 It is a schematic structural diagram of the support rope in the present invention;

[0024] Figure 4 It is a structural schematic diagram of the connecting plate in the present invention;

[0025] Figure 5 It is a structural diagram of the connection frame in the present invention;

[0026] Figure 6 It is a structural diagram of the fixed block in the present invention;

[0027] Figure 7 It is a structural diagram of the dehumidification box in the present invention;

[0028] In the figure: 1. Drying box; 12. Sealed switch door; 13. Lifting cylinder; 14. Placing table; 15. Support telescopic rod; 16. Connecting plate; 17. Support rope; 18. First air duct; 19. Second air duct; 110. Fan; 2. Slide; 21. Slider; 22. Connecting frame; 23. Protective rope; 24. Moving handle; 3. Turning rod; 31. Fixed block; 32. Chain transmission assembly; 33. Drive motor; 34. First synchronous wheel; 35. Transmission rod; 36. Second synchronous wheel; 37. Synchronous belt; 4. Tension adjustment plate; 41. Torsion spring; 5. Limiting groove; 6. Anti-wear block; 7. Clamping slot; 71. Clamping block; 72. Fixing hole; 8. Fixing rod; 81. Dehumidification box; 82. Heat exchange tube; 83. Waterproof and breathable membrane; 9. Telescopic cylinder; 91. Scraper; 101. Observation window. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0030] like Figures 1 to 7As shown, a lost foam casting machine according to an embodiment of the present invention comprises a drying box 1; the side wall of the drying box 1 is hinged with a sealed switch door 12; the bottom of the drying box 1 is fixedly connected to a lifting cylinder 13; the output end of the lifting cylinder 13 is fixedly connected to a placing table 14; a plurality of supporting telescopic rods 15 are fixedly connected between the placing table 14 and the bottom of the inner wall of the drying box 1; a pair of connecting plates 16 are symmetrically fixedly connected to the inner wall of the drying box 1; a plurality of connecting components are provided on the connecting plates 16; a supporting rope 17 is installed between the connecting components; the supporting rope 17 is located above the placing table 14; a first air duct 18 is fixedly connected to the side wall of the drying box 1; a second air duct 19 is fixedly connected to the side wall of the drying box 1; a fan 110 is installed in the middle of the second air duct 19; a dehumidification component is fixedly connected between the first air duct 18 and the second air duct 19; a heater is installed inside the second air duct 19. When working, the staff can move the lost foam coated with paint to the drying box 1 The coating is naturally dried during the movement inside the drying box 1, and the surface layer is initially dried and solidified. At this time, the lost foam is placed on the support rope 17. The position of the lost foam on the support rope 17 is adjusted through the temporary support of the placement table 14. Then the sealed switch door 12 is closed and the fan 110 and the heater are turned on. During this process, the switch of the lifting cylinder 13 is controlled at the same time, so that the lifting cylinder 13 drives the placement table 14 to move downward. At this time, the lost foam will be supported by the multiple support ropes 17 at the bottom, so that the lost foam is in a suspended state with less contact surface. The hot air is then circulated inside the drying box 1 to accelerate the drying speed of the lost foam. By using multiple support ropes 17 to support the lost foam and then drying the lost foam through circulating hot air flow, the drying dead corners can be reduced, and the surface coating of the lost foam can be dried more fully. The support rope 17 is made of strong nylon rope, which can play a stable supporting effect and is durable and high temperature resistant.

[0031] like Figures 2 to 5 As shown, a slide groove 2 is provided on the top of the connecting plate 16; a slider 21 is slidably connected inside the slide groove 2; an anti-slip damper is installed between the slider 21 and the slide groove 2; the end of the slider 21 is fixedly connected to a connecting frame 22; a plurality of protective ropes 23 are fixedly connected to the middle of the connecting frame 22; the protective ropes 23 are arranged in an array; a moving handle 24 is fixedly connected to the top of the slider 21. During operation, when the lost foam is placed on the support rope 17, the staff holds the moving handle 24 to move the slider 21 in the direction close to the lost foam, and moves the protective rope 23 to a position close to the surface of the lost foam. During the hot air circulation drying process, the protection of the connecting frames 22 and the protective ropes 23 on both sides reduces the possibility of the lost foam being blown down by the airflow, thereby improving the stability of the lost foam during the drying process. The provision of the protective ropes 23 can also further reduce the contact surface of the dead corner of the lost foam drying.

[0032] like Figures 2 to 6As shown, the connecting assembly includes a rotating rod 3 and a fixed block 31; the rotating rod 3 is rotatably connected to the side wall of the connecting plate 16; the fixed block 31 is fixed to the end of the rotating rod 3; a chain transmission assembly 32 is installed between a pair of adjacent rotating rods 3; a transmission rod 35 is fixed to the end of one of the rotating rods 3; a pair of driving motors 33 are fixed to the side wall of the drying box 1; the output end of the driving motor 33 is fixed to a first synchronous wheel 34; the end of the transmission rod 35 passes through the side wall of the drying box 1 and is rotatably connected to the drying box 1; the end of the transmission rod 35 is fixed to a second synchronous wheel 36; a synchronous belt 37 is installed between the second synchronous wheel 36 and the first synchronous wheel 34. When working, by making the pair of support ropes 17 on the fixed block 31 in a high and low state, when the lost foam is placed on the support rope 1 7, the lost foam will be on a higher support rope 17. After drying for a period of time, by controlling the switch of the drive motor 33, the drive motor 33 drives the first synchronous wheel 34 to rotate slightly, and through the connection of the synchronous belt 37, the second synchronous wheel 36 and the transmission rod 35, one of the rotating rods 3 is rotated. At the same time, under the connection of multiple chain transmission components 32, all the rotating rods 3 are rotated at the same time, and the height positions of the support rope 17 originally at a high position and the support rope 17 originally at a low position are interchanged. By alternately exchanging the support ropes 17 supporting the lost foam, the contact surface between the original support rope 17 and the lost foam can also be fully dried. By making all parts of the surface coating of the lost foam contact with the hot air and being dried, the full drying effect of the lost foam is improved.

[0033] like Figure 6 As shown, a pair of tension adjustment plates 4 are hingedly connected to the side walls of the fixed block 31; the tension adjustment plates 4 are arc-shaped; a torsion spring 41 is installed at the hinge between the tension adjustment plates 4 and the fixed block 31; the end of the tension adjustment plate 4 and the surface of the support rope 17 are in contact with each other. When working, the tension adjustment plate 4 is continuously pressed against the surface of the support rope 17 under the torsion force of the torsion spring 41, so that the support rope 17 is always in a taut state, so that when the lost foam is placed on the support rope 17, the support rope 17 supports the lost foam more stably.

[0034] like Figure 6 As shown, a limiting groove 5 is provided at the end of the tension adjustment plate 4. During operation, the limiting groove 5 is provided on the tension adjustment plate 4 so that the support rope 17 is placed inside the limiting groove 5, thereby reducing the possibility of the support rope 17 slipping and falling off the tension adjustment plate 4, and improving the matching stability between the support rope 17 and the tension adjustment plate 4.

[0035] like Figure 6As shown, the limit groove 5 is fixed with an anti-wear block 6. When working, the anti-wear block 6 is made of ceramic material, has a smooth and durable surface, and can reduce the friction loss when the tension adjustment plate 4 squeezes the support rope 17 and slides between the support rope 17 and the tension adjustment plate 4, thereby improving the service life of the support rope 17.

[0036] like Figure 6 As shown, a pair of slots 7 are provided in the middle of the fixing block 31; a block 71 is slidably connected inside the slot 7; a pair of fixing holes 72 are provided in the middle of the fixing block 31; the end of the support rope 17 is located inside the fixing hole 72. During operation, the support rope 17 is inserted into the fixing hole 72 and then the block 71 is pressed so that the block 71 and the slot 7 form a snap fit to squeeze the end of the support rope 17, thereby fixing the end of the support rope 17 inside the fixing block 31. When the support rope 17 needs to be removed for replacement, it is only necessary to pull the block 71 out of the slot 7, thereby causing the support rope 17 to lose its fixed state and be removed from the fixing block 31, making the replacement of the support rope 17 more convenient and quick.

[0037] like Figure 1 and Figure 7 As shown, the dehumidification component includes a dehumidification box 81; the first air duct 18, the second air duct 19 and the dehumidification box 81 are interconnected; the end of the second air duct 19 is located above the end of the first air duct 18; a pair of fixing rods 8 are fixed to the side wall of the drying box 1; the ends of the fixing rods 8 are fixed to the side wall of the dehumidification box 81; a waterproof and breathable membrane 83 is fixed to the inside of the dehumidification box 81; a heat exchange tube 82 is installed inside the dehumidification box 81; the heat exchange tube 82 is located below the waterproof and breathable membrane 83. When working, the dehumidification box is set between the first air duct 18 and the second air duct 19 81. When the coating is dried, the hot air will carry some moisture with it. The moisture remaining inside the drying box 1 will cause contamination and cracking of the lost foam coating. At this time, the hot air carrying moisture is allowed to enter the dehumidification box 81 through the first air duct 18, condensed into liquid on the surface of the heat exchange tube 82, and then falls to the bottom of the dehumidification box 81. The waterproof and breathable membrane 83 is used to reduce the passage of moisture, so that the dehumidified hot air passes through the second air duct 19 and enters the drying box 1 again, reducing the humid air in the drying process and improving the drying effect and safety.

[0038] like Figure 1 and Figure 7As shown, the side wall of the dehumidification box 81 is fixedly connected to a telescopic cylinder 9; the output end of the telescopic cylinder 9 is fixedly connected to a scraper 91; the scraper 91 is sleeved on the middle part of the heat exchange tube 82, and is in contact with the surface of the heat exchange tube 82. When working, by turning on the switch of the telescopic cylinder 9, the telescopic cylinder 9 drives the scraper 91 to slide on the surface of the heat exchange tube 82, and scrapes the condensed water on the surface of the heat exchange tube 82 to the bottom of the dehumidification box 81, reducing the moisture residue on the surface of the heat exchange tube 82 and improving the dehumidification effect of the heat exchange tube 82 on the air.

[0039] like Figure 1 As shown, an observation window 101 is provided on the side wall of the dehumidification box 81; the observation window 101 is made of transparent material. During operation, the moisture collection situation of the dehumidification box 81 can be clearly and transparently observed through the observation window 101, and the staff can accurately and quickly replace a certain amount of accumulated moisture, thereby reducing the problem of excessive moisture accumulation inside the dehumidification box 81 leading to a decrease in dehumidification effect.

[0040] During operation, the staff moves the paint-coated lost foam into the drying box 1. During the movement, the coating is naturally dried and the surface layer is initially dried and solidified. At this time, the lost foam is placed on the support rope 17. The position of the lost foam on the support rope 17 is adjusted through the temporary support of the placement table 14. Then the sealed switch door 12 is closed and the fan 110 and the heater are turned on. During this process, the switch of the lifting cylinder 13 is controlled at the same time, so that the lifting cylinder 13 drives the placement table 14 to move downward. At this time, the lost foam will be supported by the multiple support ropes 17 at the bottom, so that the lost foam is in a suspended state with less contact surface. Then, the hot air is circulated in the drying box 1 to accelerate the drying speed of the lost foam. By using multiple support ropes 17 to support the lost foam and then drying the lost foam through circulating hot air, the drying dead corners can be reduced and the surface coating of the lost foam can be dried more fully. The support rope 17 is made of strong nylon rope, which can play a stable supporting effect and is durable and high temperature resistant.

[0041] When placing the lost foam on the support rope 17, the staff holds the moving handle 24, moves the slider 21 toward the lost foam, and moves the protective rope 23 to a position close to the surface of the lost foam. During the hot air circulation drying process, the connection frames 22 and the protective rope 23 on both sides protect the lost foam, thereby reducing the possibility of being blown down by the airflow, improving the stability of the lost foam during the drying process, and providing the protective rope 23 can further reduce the contact surface of the lost foam drying dead corners.

[0042] By making the pair of support ropes 17 on the fixed block 31 in a high-low state, when the lost mold is placed on the support rope 17, the lost mold will be on the higher support rope 17, after a period of drying, by controlling the switch of the driving motor 33, the driving motor 33 drives the first synchronous wheel 34 to rotate slightly, through the connection of the synchronous belt 37, the second synchronous wheel 36 and the transmission rod 35, one of the rotating rods 3 rotates, at the same time, under the connection of the plurality of chain transmission assemblies 32, all the rotating rods 3 rotate at the same time, and the height positions of the support rope 17 originally in the high position and the support rope 17 in the low position are exchanged, the support rope 17 supporting the lost mold is alternately exchanged, so that the contact surface of the original support rope 17 and the lost mold can also be fully dried, and all parts of the surface coating of the lost mold can be contacted with hot air to be dried, thereby improving the drying effect of the lost mold.

[0043] By making the tension adjusting plate 4 constantly top on the surface of the support rope 17 under the torsional force of the torsional spring 41, the support rope 17 is always in a taut state, and then the support rope 17 supports the lost mold more stably when the lost mold is placed on the support rope 17.

[0044] By opening the limiting groove 5 on the tension adjusting plate 4, the support rope 17 is placed inside the limiting groove 5, which reduces the possibility of the support rope 17 slipping off the tension adjusting plate 4, and improves the cooperation stability between the support rope 17 and the tension adjusting plate 4.

[0045] The wear-resistant block 6 is made of ceramic material, which is smooth and durable, and can reduce the friction loss between the support rope 17 and the tension adjusting plate 4 when the tension adjusting plate 4 extrudes the support rope 17, thereby improving the service life of the support rope 17.

[0046] By inserting the support rope 17 into the fixed hole 72, then pressing the clamping block 71, extruding the end of the support rope 17 when the clamping block 71 and the clamping groove 7 are clamped, and then fixing the end of the support rope 17 in the fixed block 31, when it is necessary to take down and replace the support rope 17, only need to pull out the clamping block 71 from the clamping groove 7, and then take out the support rope 17 from the fixed block 31 when the support rope 17 loses the fixed state, so that the replacement of the support rope 17 is more convenient and fast.

[0047] By arranging a dehumidification box 81 between the first air duct 18 and the second air duct 19, when the coating is dried, the hot air will flow with some moisture. The moisture remaining in the drying box 1 will cause contamination and cracking of the lost foam coating. At this time, the hot air carrying moisture is allowed to enter the dehumidification box 81 through the first air duct 18, condensed into liquid on the surface of the heat exchange tube 82, and then falls to the bottom of the dehumidification box 81. The waterproof and breathable membrane 83 is used to reduce the passage of moisture, so that the dehumidified hot air passes through the second air duct 19 and enters the drying box 1 again, thereby reducing the humid air in the drying process and improving the drying effect and safety.

[0048] By turning on the switch of the telescopic cylinder 9, the telescopic cylinder 9 drives the scraper 91 to slide on the surface of the heat exchange tube 82, and scrapes the condensed water on the surface of the heat exchange tube 82 to the bottom of the dehumidification box 81, reducing the residual moisture on the surface of the heat exchange tube 82 and improving the dehumidification effect of the heat exchange tube 82 on the air.

[0049] The moisture collection situation of the dehumidification box 81 can be clearly and transparently observed through the observation window 101, and the staff can accurately and quickly replace a certain amount of accumulated moisture, thereby reducing the problem of excessive moisture accumulation inside the dehumidification box 81 causing a decrease in dehumidification effect.

[0050] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A lost foam casting machine, comprising a drying box (1); characterized in that: The side wall of the drying box (1) is hinged with a sealed switch door (12); the bottom of the drying box (1) is fixedly connected to a lifting cylinder (13); the output end of the lifting cylinder (13) is fixedly connected to a placement table (14); a plurality of supporting telescopic rods (15) are fixedly connected between the placement table (14) and the bottom of the inner wall of the drying box (1); a pair of connecting plates (16) are symmetrically fixedly connected to the inner wall of the drying box (1); a plurality of connecting components are provided on the connecting plates (16); a supporting rope (17) is installed between the connecting components; the supporting rope (17) is located above the placement table (14); a first air duct (18) is fixedly connected to the side wall of the drying box (1); a second air duct (19) is fixedly connected to the side wall of the drying box (1); a fan (110) is installed in the middle of the second air duct (19); a dehumidification component is fixedly connected between the first air duct (18) and the second air duct (19); a heater is installed inside the second air duct (19); A slide groove (2) is provided on the top of the connecting plate (16); a slider (21) is slidably connected inside the slide groove (2); an anti-slip damper is installed between the slider (21) and the slide groove (2); a connecting frame (22) is fixedly connected to the end of the slider (21); a plurality of protective ropes (23) are fixedly connected to the middle of the connecting frame (22); the protective ropes (23) are arranged in an array; a moving handle (24) is fixedly connected to the top of the slider (21); The connecting assembly comprises a rotating rod (3) and a fixed block (31); the rotating rod (3) is rotatably connected to the side wall of the connecting plate (16); the fixed block (31) is fixed to the end of the rotating rod (3); a chain transmission assembly (32) is installed between a pair of adjacent rotating rods (3); a transmission rod (35) is fixed to the end of one of the rotating rods (3); a pair of driving motors (33) are fixed to the side wall of the drying box (1); the output end of the driving motor (33) is fixed to a first synchronous wheel (34); the end of the transmission rod (35) passes through the side wall of the drying box (1) and is rotatably connected to the drying box (1); the end of the transmission rod (35) is fixed to a second synchronous wheel (36); a synchronous belt (37) is installed between the second synchronous wheel (36) and the first synchronous wheel (34); A pair of tension adjustment plates (4) are hingedly connected to the side walls of the fixed block (31); the tension adjustment plates (4) are arranged in an arc shape; a torsion spring (41) is installed at the hinge between the tension adjustment plates (4) and the fixed block (31); and the ends of the tension adjustment plates (4) and the surface of the support rope (17) are in contact with each other.

2. The lost foam casting machine according to claim 1, characterized in that: A limiting groove (5) is provided at the end of the tension adjustment plate (4).

3. The lost foam casting machine according to claim 2, characterized in that: An anti-wear block (6) is fixedly connected inside the limiting groove (5).

4. The lost foam casting machine according to claim 3, characterized in that: A pair of slots (7) are provided in the middle of the fixing block (31); a fixing block (71) is slidably connected inside the slots (7); a pair of fixing holes (72) are provided in the middle of the fixing block (31); and the ends of the support rope (17) are located inside the fixing holes (72).

5. The lost foam casting machine according to claim 4, characterized in that: The dehumidification assembly includes a dehumidification box (81); the first air duct (18), the second air duct (19) and the dehumidification box (81) are interconnected; the end of the second air duct (19) is located above the end of the first air duct (18); a pair of fixing rods (8) are fixedly connected to the side wall of the drying box (1); the ends of the fixing rods (8) are fixedly connected to the side wall of the dehumidification box (81); a waterproof and breathable membrane (83) is fixedly connected to the inside of the dehumidification box (81); a heat exchange tube (82) is installed inside the dehumidification box (81); and the heat exchange tube (82) is located below the waterproof and breathable membrane (83).

6. The lost foam casting machine according to claim 5, characterized in that: A telescopic cylinder (9) is fixedly connected to the side wall of the dehumidification box (81); a scraper (91) is fixedly connected to the output end of the telescopic cylinder (9); the scraper (91) is sleeved on the middle of the heat exchange tube (82) and is in contact with the surface of the heat exchange tube (82).

7. The lost foam casting machine according to claim 6, characterized in that: An observation window (101) is provided on the side wall of the dehumidification box (81); the observation window (101) is made of a transparent material.

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