An out-of-furnace device for a shell baking furnace in investment casting

Abstract

The present invention provides a mold shell baking furnace discharging device for investment casting, comprising: a baking furnace, which is arranged in a through manner; a track, laid in the baking furnace and extending towards the inlet and outlet of the baking furnace at both ends respectively; a kiln car, arranged on the track and capable of entering and leaving the baking furnace along the track; an operation platform, arranged on both sides of the track along the direction of the baking furnace outlet; a gear-rack transmission mechanism, arranged under the operation platform; an execution mechanism, including a force-receiving device arranged under the kiln car and a force-applying device arranged on the gear-rack transmission mechanism, wherein the force-applying device applies a force to the force-receiving device under the drive of the gear-rack transmission mechanism so as to move the kiln car from the baking furnace to the pouring operation area. By hiding the gear-rack transmission mechanism and cooperating with the execution mechanism, the present invention can smoothly push the kiln car to the pouring operation area, avoid damage to the gear-rack caused by splashing molten steel during pouring, improve the reliability of the discharging system, and reduce the downtime of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of investment casting, and particularly to an out-of-furnace device for an investment casting mold shell roasting furnace. Background Art

[0002] In the production process of investment casting, the mold shell roasting process is to perform high-temperature roasting on the dewaxed mold shell in a through-type roasting furnace to remove the residual wax in the mold shell and the moisture existing in the mold shell itself, and to ensure the purity and high-temperature strength of the mold shell so as to ensure the quality of the casting. The mold shell is placed on a high-temperature-resistant kiln car, and high-temperature roasting is carried out by the operation of the kiln car in the furnace. After the roasting requirements are met, the kiln car needs to be pushed out to the melting and pouring station for pouring molten steel. At present, the mainstream out-of-furnace devices for through-type roasting furnaces are of two types: a chain-driven device and a hydraulic-driven device. The chain-driven out-of-furnace device has a limited conveying distance, and the installation position of the chain drive mechanism is directly below the kiln car. The dropping of the molten steel or steel slag splashed during the pouring process will cause damage to the chain or transmission jamming, and then lead to shutdown and production suspension. The hydraulic-driven discharging device also has the disadvantages of short conveying distance and exposed mechanical structure, and the seal of the oil cylinder is also easily damaged under high-temperature conditions, with a high failure rate.

[0003] In order to effectively solve the drawbacks of traditional out-of-furnace devices, reduce the maintenance cost and failure rate, it is necessary to invent and innovate a new type of out-of-furnace device with high reliability, high out-of-furnace efficiency and low maintenance cost. Summary of the Invention

[0004] In view of this, the present invention provides an out-of-furnace device for an investment casting mold shell roasting furnace with reliable operation, high operation efficiency and low maintenance cost.

[0005] The technical solution of the present invention is realized as follows: The present invention provides an out-of-furnace device for an investment casting mold shell roasting furnace, including:

[0006] A roasting furnace, which is of a through-type setting;

[0007] Tracks, laid in the roasting furnace, and extending towards the inlet and outlet of the roasting furnace at both ends respectively;

[0008] A kiln car, arranged on the tracks and capable of entering and exiting the roasting furnace along the tracks;

[0009] An operation platform, arranged on both sides of the tracks along the direction of the roasting furnace outlet;

[0010] A gear-rack transmission mechanism, arranged below the operation platform;

[0011] The actuator includes a force-receiving device arranged under the kiln car and a force-applying device arranged on the gear-rack transmission mechanism. The force-applying device applies a force to the force-receiving device under the drive of the gear-rack transmission mechanism so that the kiln car moves from the roasting furnace to the casting operation area.

[0012] On the basis of the above technical solution, preferably, two sets of the gear-rack transmission mechanisms are provided and symmetrically arranged under the operation platforms on both sides of the track. The gear-rack transmission mechanism includes a slide rail, an out-of-furnace trolley, a driving motor, a straight rack and a gear. Among them, the slide rail is fixedly arranged under the operation platform and arranged along the track direction. The straight rack is fixedly arranged on the lower surface of one side of the track. The out-of-furnace trolley is slidably connected to the slide rail. The driving motor is fixedly connected to the bottom of the out-of-furnace trolley. The output shaft of the driving motor is fixedly connected to the gear through a reducer. The gear is meshed with the straight rack.

[0013] Furthermore, preferably, the out-of-furnace trolley includes a trolley body. At least two transmission shafts are fixedly arranged on the trolley body. The two ends of the transmission shaft are respectively rotatably connected with traveling wheels. The traveling wheels are slidably connected to the slide rail.

[0014] On the basis of the above technical solution, preferably, a roasting carrier for loading the formwork is further arranged on the kiln car. Pulleys slidably connected to the track are arranged at the bottom of the kiln car.

[0015] On the basis of the above technical solution, preferably, two sets of the actuators are provided and symmetrically arranged along the central axis of the kiln car. The force-applying device includes a connecting piece and a pushing piece. One end of the connecting piece is horizontally and fixedly installed at the bottom of the out-of-furnace trolley, and the other end extends towards the bottom of the kiln car. The pushing piece is fixedly installed at the other end of the connecting piece and extends towards the bottom of the kiln car. The force-receiving device includes a fixing plate, a movable stop block and a limiting piece. The fixing plate is vertically and fixedly installed on the lower surface of the kiln car. The fixing plate has an installation surface facing the force-applying device. The upper end of the movable stop block is rotatably connected to the installation surface of the fixing plate. The lower part of the movable stop block is vertically downward and extends out of the bottom of the fixing plate. The projection of the movable stop block in the vertical direction intersects with the projection of the pushing piece in the horizontal direction. The limiting piece is fixedly installed on the installation surface where the upper end of the movable stop block is located, and the limiting piece is arranged on the side of the movable stop block away from the roasting furnace outlet.

[0016] Based on the above technical solutions, preferably, a first position sensor is provided on the side wall of the operation platform where the outlet of the roasting furnace is located, which is used to obtain the position signal of the movable stopper in the force receiving device on the kiln car to be taken out of the furnace. A second position sensor is provided at the bottom of the operation platform where the first position sensor is away from the furnace outlet direction, which is used to obtain the position signal of the pushing member in the force applying device on the gear rack transmission mechanism. A plurality of detection units for detecting the pouring station are arranged at intervals on the operation platform in the furnace outlet direction. The detection unit includes a third position sensor and a control button for detecting the position of the kiln car entering the pouring station, and also includes a PLC controller installed on the operation platform. The PLC controller is electrically connected to the first position sensor, the second position sensor, the third position sensor, the control button and the drive motor respectively.

[0017] The present invention has the following beneficial effects compared with the prior art:

[0018] (1) The investment casting shell roasting furnace discharging device disclosed by the present invention is provided with a gear rack transmission mechanism, which is concealedly installed under the operation platform. Since the transmission stroke of the gear rack can be made long enough to meet the rotation stroke from roasting to molten steel pouring, and a force applying device is provided on the gear rack transmission mechanism, the gear rack transmission mechanism can apply force to the force receiving device under the kiln car while making a linear motion, so that the kiln car can be smoothly pushed from the outlet of the roasting furnace to the pouring operation area. In addition, the gear rack transmission mechanism is concealedly arranged under the operation platform, which avoids damage to the gear rack caused by splashing of molten steel during pouring, improves the reliability of the discharging system, and reduces the downtime and production suspension time of the device.

[0019] (2) Under normal working conditions, the bilateral gear rack transmission mechanism and the actuator work together to improve the smoothness of the discharging process. When the discharging device needs to be repaired or one side of the gear rack transmission mechanism fails, the gear rack transmission mechanism on the other side can be used to ensure continuous production, thereby substantially improving the reliability and flexibility of the discharging system, further reducing the maintenance cost and increasing the production efficiency.

[0020] (3) The roasting furnace discharging device can also realize the function of fixed-point transportation according to needs, greatly shortening the molten steel transfer distance, directly reaching the pouring station, greatly improving the production efficiency, and reducing the waiting time and tonnage production energy consumption of the molten steel melting process. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 The top view of the baking furnace discharging device disclosed by the present invention;

[0023] Figure 2 The front view of the baking furnace discharging device disclosed by the present invention;

[0024] Figure 3 is Figure 2 the partial enlarged view at A in

[0025] Figure 4 The working state schematic diagram of the discharging device disclosed by the present invention;

[0026] Figure 5 The schematic diagram of the position of the photoelectric sensor of the discharging device disclosed by the present invention. Detailed implementation manners

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in combination with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] As Figure 1 shown, in combination with Figure 2 , the present invention discloses a discharging device for a shell baking furnace in investment casting, including:

[0029] A through-type baking furnace 1, used for high-temperature baking of the shell.

[0030] A track 2, laid in the baking furnace 1, and extending towards the inlet and outlet of the baking furnace 1 at both ends respectively; through the track 2, the shell to be baked can be loaded on the kiln car 3, and guided by the track 2, it can be sent into the baking furnace 1 from the inlet for high-temperature baking operation. After the baking is completed, it is pushed out from the outlet of the baking furnace 1 and moved to the pouring operation area for molten steel pouring operation.

[0031] A kiln car 3, used for loading the shell to be baked. The kiln car 3 is usually made of heat-resistant metal material. The kiln car 3 is arranged on the track 2, and usually a hydraulic cylinder is used to push the kiln car 3 into the baking furnace 1 on the track 2.

[0032] The operating platform 4 is arranged on both sides of the track 2 along the outlet direction of the roasting furnace 1, facilitating the operators to stand on both sides of the operating platform 4 to perform the molten steel pouring operation on the mold shell loaded on the kiln car 3 after it comes out of the furnace. In this embodiment, the operating platform 4 is arranged in an inverted "L" shape, facilitating the concealed installation of the gear-rack transmission mechanism 5 described below.

[0033] The gear-rack transmission mechanism 5 is concealedly installed under the operating platform 4 and is used for linear motion.

[0034] The actuating mechanism 6 includes a force-bearing device 61 arranged under the kiln car 3 and a force-applying device 62 arranged on the gear-rack transmission mechanism 5. The force-applying device 62 applies force to the force-bearing device 61 under the drive of the gear-rack transmission mechanism 5 so that the kiln car 3 moves from inside the roasting furnace 1 to the pouring operation area.

[0035] With the above technical solution, the mold shell is loaded on the kiln car 3 and enters the roasting furnace 1 through the track 2. After the high-temperature roasting of the mold shell is completed, it is pushed out to the outlet of the roasting furnace 1 by a hydraulic cylinder. At this time, since the kiln car 3 is in a high-temperature state, when the kiln car 3 is pushed out of the roasting furnace 1 and moves to the pouring station, its travel is relatively large. If the hydraulic cylinder is still used for linear transmission of the kiln car 3, the travel is insufficient, and when pouring molten steel, the high temperature of the molten steel will also cause damage to the seal of the hydraulic cylinder. If chain drive is adopted, the molten steel or slag splashed during the pouring process will cause damage to the chain or transmission jamming, and then lead to shutdown and production suspension. Therefore, in the present invention, the gear-rack transmission mechanism 5 is concealedly arranged under the operating platform 4, which has the following advantages: First, the travel of the gear-rack transmission can be made long enough, usually 5m - 150m, which is sufficient to meet the rotation travel from roasting to molten steel pouring. By arranging the force-applying device 62 on the gear-rack transmission mechanism 5, the gear-rack transmission mechanism 5 can apply force to the force-bearing device 61 under the kiln car 3 while performing linear motion, so that the kiln car 3 can be smoothly pushed from the outlet of the roasting furnace 1 to the pouring operation area. Second, the gear-rack transmission mechanism 5 is concealedly arranged under the operating platform 4, avoiding damage to the gear-rack caused by splashing during molten steel pouring, improving the reliability of the discharging system, and reducing the shutdown and production suspension time of the device.

[0036] The present invention is also realized through the following technical solutions.

[0037] Referring to the attached Figure 3 As shown, there are two sets of gear-rack transmission mechanisms 5, which are symmetrically arranged under the operating platforms 4 on both sides of the track 2.

[0038] Adopting the above technical solution, by respectively arranging a gear-rack transmission mechanism 5 under the operation platforms 4 on both sides of the track 2, while the gear-rack transmission mechanism 5 makes a linear motion, the two sets of gear-rack transmission mechanisms 5 can simultaneously drive the corresponding force-applying devices 62 to apply force to the force-receiving devices 61 on both sides under the kiln car 3, so that the kiln car 3 can be more smoothly pushed from the outlet of the roasting furnace 1 to the casting station. This structure is more balanced in force application and will not cause fatigue damage to the unilateral gear-rack transmission mechanism 5. At the same time, when the discharging device needs to be repaired or a unilateral gear-rack transmission mechanism 5 fails, the other side's gear-rack transmission mechanism 5 can be used to ensure continuous production, thereby substantially improving the reliability and flexibility of the discharging system, further reducing the maintenance cost and increasing the production efficiency.

[0039] In this embodiment, the gear-rack transmission mechanism 5 includes a slide rail 51, a discharging trolley 52, a driving motor 53, a straight rack 54 and a gear 55. Among them, the slide rail 51 is fixedly arranged under the operation platform 4 and is arranged along the direction of the track 2. The straight rack 54 is fixedly arranged on the lower surface of one side of the track 2. The discharging trolley 52 is slidably connected with the slide rail 51. The driving motor 53 is fixedly connected to the bottom of the discharging trolley 52. The output shaft of the driving motor 53 is fixedly connected with the gear 55 through a speed reducer. The gear 55 is meshed and connected with the straight rack 54.

[0040] Adopting the above technical solution, during the rotation of the driving motor 53, the gear 55 is driven to rotate through the speed reducer. During the rotation of the gear 55, meshing transmission occurs with the straight rack 54. Since the straight rack 54 is relatively fixed to the slide rail 51, and the slide rail 51 is fixedly connected to the operation platform 4, during the meshing transmission between the gear 55 and the straight rack 54, the driving motor can be driven to drive the discharging trolley 52 to make a linear motion along the slide rail 51. By adopting the gear-rack transmission, higher transmission accuracy can be obtained, the transmitted power is large, the service life is long, the operation is stable, the reliability is high, and a constant transmission ratio can be ensured.

[0041] Further, preferably, the discharging trolley 52 includes a trolley body 521. At least two transmission shafts 522 are fixedly arranged on the trolley body 521. Driving wheels 523 are respectively rotatably connected to both ends of the transmission shafts 522. The driving wheels 523 are slidably connected with the slide rail 51. Since the gear and the rack drive while driving the driving motor 53 to make a linear motion, and then the driving motor 53 drives the discharging trolley 52 to slide on the slide rail 51. By arranging the trolley body 521 and at least two transmission shafts 522, the trolley body 521 can be kept in a horizontal linear motion with respect to the track 2. At the same time, the multiple transmission shafts 522 drive the driving wheels 523 to slide on the slide rail 51, making the movement of the discharging trolley 52 on the slide rail 51 more stable.

[0042] In some preferred embodiments, a roasting carrier 31 for loading the formwork is further provided on the kiln car 3, and pulleys 32 slidably connected to the track 2 are provided at the bottom of the kiln car 3. By providing the roasting carrier 31, it is convenient to directly place the roasting carrier 31 loaded with the formwork on the kiln car 3 for roasting, and it is also convenient to carry and transfer the formwork as a whole after it is taken out of the furnace. At least two sets of pulleys 32 are provided at the bottom of the kiln car 3, so that the kiln car 3 can run smoothly on the track 2.

[0043] In this embodiment, two sets of actuators 6 are provided and are symmetrically arranged along the central axis of the kiln car 3.

[0044] With the above structure, it is used in conjunction with two sets of gear-rack transmission mechanisms 5. When one set of actuators 6 needs to be repaired or fails, the other set of actuators 6 can be used to ensure uninterrupted production, thereby substantially improving the reliability and flexibility of the discharging system, further reducing the maintenance cost and increasing the production efficiency.

[0045] Refer to the appendix Figure 3 and 4 As shown, in this embodiment, the force-applying device 62 includes a connecting member 621 and a pushing member 622. One end of the connecting member 621 is horizontally and fixedly installed at the bottom of the discharging trolley 52, and the other end extends towards the bottom of the kiln car 3. The pushing member 622 is fixedly installed at the other end of the connecting member 621 and extends towards the bottom of the kiln car 3; the force-receiving device 61 includes a fixing plate 611, a movable stopper 612 and a limiting member 613. The fixing plate 611 is vertically and fixedly installed on the lower surface of the kiln car 3. The fixing plate 611 has an installation surface facing the force-applying device 62. The upper end of the movable stopper 612 is rotatably connected to the installation surface of the fixing plate 611. The lower end of the movable stopper 612 is vertically downward and extends out of the bottom of the fixing plate 611. The projection of the movable stopper 612 in the vertical direction intersects with the projection of the pushing member 622 in the horizontal direction. The limiting member 613 is fixedly installed on the installation surface where the upper end of the movable stopper 612 is located, and the limiting member 613 is arranged on the side of the movable stopper 612 away from the outlet of the roasting furnace 1.

[0046] With the above technical solution, in the initial state, since the upper end of the movable block 612 is rotatably connected to the fixed plate 611, the lower end of the movable block 612 is vertically downward under the action of gravity. Also, since the limiting member 613 is provided on the side of the movable block 612 away from the outlet of the roasting furnace 1 and the limiting member 613 is located at the upper end of the movable block 612, when the force applying device 62 needs to apply force to the force receiving device 61 to push the kiln car 3 from the outlet to the casting station. It can be achieved through the following steps. First, by reversing the driving motor 53, the driving motor 53 drives the gear 55 to rotate counterclockwise. Under the transmission of the gear and rack, the out-of-furnace trolley 52 moves closer to the kiln car 3 along the slide rail 51. While the out-of-furnace trolley 52 moves in a straight line, it drives the connecting member 621 to move in a straight line, and the pushing member 622 at the end of the connecting member 621 synchronously approaches the force receiving device 61 at the bottom of the kiln car 3. The pushing member 622 pushes the movable block 612 to rotate clockwise. When the connection between the connecting member 621 and the movable block 612 is disengaged, the movable block 612 rotates back to the vertical state due to its own weight. At this time, by rotating the driving motor 53 forward, the driving motor 53 drives the gear 55 to rotate clockwise. Under the transmission of the gear and rack, the out-of-furnace trolley 52 moves along the slide rail 51 to the casting station. The out-of-furnace trolley 52 drives the pushing member 622 on the force applying device 62 to slowly approach the movable block 612 on the force receiving device 61. While the pushing member 622 pushes the movable block 612, due to the setting of the limiting member 613, the movable block 612 cannot rotate counterclockwise, so that the force applying device 62 applies force to the force receiving device 61 to push the kiln car 3 towards the casting station.

[0047] The above-mentioned actuator 6 has a simple structure, is convenient to operate, and is also easy to maintain. When used in cooperation with the gear and rack transmission mechanism 5, it improves the power transmission performance and the power transmission is stable.

[0048] Refer to the attached Figure 5 As shown in the figure, in the embodiment of the present invention, a first position sensor 7 is provided on the side wall of the operation platform 4 at the outlet of the roasting furnace 1 for obtaining the position signal of the movable block 612 in the force receiving device 61 on the kiln car 3 to be taken out of the furnace. A second position sensor 8 is provided at the bottom of the operation platform 4 where the first position sensor 7 is away from the outlet direction for obtaining the position signal of the pushing member 622 in the force applying device 62 on the gear 55 rack transmission mechanism 5. A plurality of detection units 9 for detecting the casting station are arranged at intervals on the operation platform 4 in the outlet direction. The detection unit 9 includes a third position sensor 91 for detecting the position of the kiln car entering the casting station and a control button 92, and also includes a PLC controller 10 installed on the operation platform 4. The PLC controller 10 is electrically connected to the first position sensor 7, the second position sensor 8, the third position sensor 91, the control button 92, and the driving motor 53 respectively.

[0049] With the above technical solution, after the control button 92 on any casting station in the tapping direction issues an instruction to request tapping, the PLC controller 10 controls the furnace door of the roasting furnace 1 to open. The current first kiln car 3 is pushed by the hydraulic cylinder to the outlet of the roasting furnace 1. When the first position sensor 7 detects the movable stop block 612 at the bottom of the first kiln car 3, the first position sensor 7 transmits a signal to the PLC controller 10. The PLC controller 10 drives the drive motor 53 to reverse. Under the transmission of the gear 55 and the rack, the tapping trolley 52 moves towards the first kiln car 3. At the same time, after the pushing member 622 on the tapping trolley 52 passes over the movable stop block 612 at the bottom of the first kiln car 3 and is detected by the second position sensor 8, the PLC controller 10 drives the drive motor 53 to rotate forward. Under the gear-rack transmission, the tapping trolley 52 moves towards the casting station that currently issues an instruction request. During the movement of the tapping trolley 52, the pushing member 622 pushes the movable stop block 612 at the bottom of the first kiln car 3, thereby pushing the first kiln car 3 to the casting station that currently issues an instruction request. When the first kiln car 3 is detected by the third position sensor 91 on the current casting station, the PLC controller 10 controls the drive motor 53 to stop rotating. In order to better implement the control of the PLC control for the reverse running stroke, the tapping trolley 52 stays at a fixed waiting point between the outlet of the roasting furnace 1 and the casting station in the initial state. After the current first kiln car 3 is pushed, the PLC controller 10 drives the tapping trolley 52 to retreat along the slide rail 51 to the fixed waiting point, so as to wait for the next tapping request. Suppose there are 1# casting station, 2# casting station and 3# casting station arranged in sequence along the tapping direction. When the molten steel pouring of the kiln car 3 at the 1# casting station is completed and pouring operation needs to be carried out at the 2# casting station, the second kiln car 3 will push the first kiln car 3 to drive away from the 2# casting station, so that the second kiln car 3 is in the 2# casting station. When the 1# casting station, 2# casting station and 3# casting station are all occupied by the kiln cars 3, the newly tapped kiln car 3 will push the above 3 kiln cars 3 to drive away from the designated casting station, so that these kiln cars 3 can carry out line transfer operation.

[0050] In the above embodiment, the first position sensor 7, the second position sensor 8 and the third position sensor 91 can adopt photoelectric sensors or proximity switches.

[0051] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mold shell roasting furnace discharging device for investment casting, characterized in that, Including: A roasting furnace (1), which is of a through type; A track (2), which is laid inside the roasting furnace (1) and extends towards the inlet and outlet of the roasting furnace (1) at both ends respectively; A kiln car (3), which is arranged on the track (2) and can enter and exit the roasting furnace (1) along the track (2); An operation platform (4), which is arranged on both sides of the track (2) along the outlet direction of the roasting furnace (1); A gear-rack transmission mechanism (5), which is arranged below the operation platform (4); An actuator (6), including a force-receiving device (61) arranged below the kiln car (3) and a force-applying device (62) arranged on the gear-rack transmission mechanism (5). The force-applying device (62) applies a force to the force-receiving device (61) under the drive of the gear-rack transmission mechanism (5) so that the kiln car (3) moves from the outlet of the roasting furnace (1) to the casting operation area; There are two sets of the gear-rack transmission mechanisms (5), which are symmetrically arranged below the operation platforms (4) on both sides of the track (2). The gear-rack transmission mechanism (5) includes a slide rail (51), an out-of-furnace trolley (52), a driving motor (53), a straight rack (54) and a gear (55). Among them, the slide rail (51) is fixedly arranged below the operation platform (4) and is arranged along the direction of the track (2). The straight rack (54) is fixedly arranged on the lower surface of one side of the track (2). The out-of-furnace trolley (52) is slidably connected with the slide rail (51). The driving motor (53) is fixedly connected with the bottom of the out-of-furnace trolley (52). The output shaft of the driving motor (53) is fixedly connected with the gear (55) through a reducer. The gear (55) is meshed and connected with the straight rack (54); There are two sets of the actuators (6), which are symmetrically arranged along the central axis of the kiln car (3). The force-applying device (62) includes a connecting piece (621) and a pushing piece (622). One end of the connecting piece (621) is horizontally and fixedly installed at the bottom of the out-of-furnace trolley (52), and the other end extends towards the bottom of the kiln car (3). The pushing piece (622) is fixedly installed at the other end of the connecting piece (621) and extends towards the bottom of the kiln car (3). The force-receiving device (61) includes a fixing plate (611), a movable stop block (612) and a limiting piece (613). The fixing plate (611) is vertically and fixedly installed on the lower surface of the kiln car (3). The fixing plate (611) has an installation surface, and the installation surface faces the force-applying device (62). The upper end of the movable stop block (612) is rotatably connected with the installation surface of the fixing plate (611). The lower part of the movable stop block (612) is vertically downward and extends out of the bottom of the fixing plate (611). The projection of the movable stop block (612) in the vertical direction intersects with the projection of the pushing piece (622) in the horizontal direction. The limiting piece (613) is fixedly installed on the installation surface where the upper end of the movable stop block (612) is located, and the limiting piece (613) is arranged on the side of the movable stop block (612) away from the outlet of the roasting furnace (1); The discharging trolley (52) includes a trolley body (521). At least two transmission shafts (522) are fixedly arranged on the trolley body (521). Driving wheels (523) are rotatably connected to both ends of the transmission shafts (522). The driving wheels (523) are slidably connected to the slide rails (51).

2. The discharging device of an investment casting mold shell baking furnace (1) according to claim 1, characterized in that: A roasting carrier (31) for loading the formwork is further arranged on the kiln car (3). Pulleys (32) slidably connected to the track (2) are arranged at the bottom of the kiln car (3).

3. The out-of-furnace device of an investment casting mold shell roasting furnace according to claim 1, characterized in that: A first position sensor (7) is arranged on the side wall of the operation platform (4) where the outlet of the roasting furnace (1) is located, for obtaining the position signal of the movable stop block (612) in the force-applying device (61) on the to-be-discharged kiln car (3). A second position sensor (8) is arranged at the bottom of the operation platform (4) where the first position sensor (7) is away from the discharging direction, for obtaining the position signal of the pushing member (622) in the force-applying device (62) on the rack and pinion transmission mechanism (5) of the gear (55). A plurality of detection units (9) for detecting the pouring station are arranged at intervals on the operation platform (4) in the discharging direction. The detection unit (9) includes a third position sensor (91) for detecting the position of the kiln car entering the pouring station and a control button (92), and further includes a PLC controller (10) installed on the operation platform (4). The PLC controller (10) is electrically connected to the first position sensor (7), the second position sensor (8), the third position sensor (91), the control button (92) and the drive motor (53) respectively.

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