CN212457934U - Roasting furnace discharging device for investment casting formwork - Google Patents

Abstract

The utility model provides an investment casting die shell bakes burning furnace device of coming out of stove over a slow fire, include: the roasting furnace is arranged in a through manner; the track is laid in the roasting furnace, and two ends of the track respectively extend towards the inlet and the outlet of the roasting furnace; the kiln car is arranged on the track and can enter and exit the roasting furnace along the track; the operation platforms are arranged on two sides of the track along the outlet direction of the roasting furnace; the gear rack transmission mechanism is arranged below the operating platform; and the actuating mechanism comprises a stress device arranged below the kiln car and a force application device arranged on the gear rack transmission mechanism, and the force application device applies force to the stress device under the driving of the gear rack transmission mechanism so as to enable the kiln car to move from the roasting furnace to the pouring operation area. The utility model discloses a hidden gear rack drive mechanism that sets up, the cooperation sets up actuating mechanism, can promote the pouring operation district smoothly with the kiln car. The damage to the gear rack caused by molten steel splashing during pouring is avoided, the reliability of a discharging system is improved, and the shutdown time of the device is reduced.

Description

Roasting furnace discharging device for investment casting formwork

Technical Field

The utility model relates to an investment casting technical field especially relates to an investment casting shell bakes burning furnace device of coming out of stove over a slow fire.

Background

In the production process of investment casting, the mould shell roasting process is to carry out high-temperature roasting on the mould shell after dewaxing in a through-type roasting furnace to remove residual wax materials in the mould shell and water existing in the mould shell, and ensure the purity and high-temperature strength of the mould shell so as to ensure the quality of a casting. The mould shell is placed on a high-temperature resistant kiln car, and the high-temperature roasting is carried out by the operation of the kiln car in the furnace. After the roasting requirement is met, the kiln car needs to be pushed out to a smelting and pouring station for molten steel pouring. At present, two types of furnace discharging devices of a main stream of the through type roasting furnace are a chain driving type device and a hydraulic driving type device. The chain drive type tapping device is limited in conveying distance, the chain drive mechanism is arranged right below the kiln car, molten steel splashed in the pouring process or steel slag falls to cause chain damage or transmission clamping stagnation, and further stop production is caused. The hydraulic drive type discharging device also has the defects of short conveying distance and exposed mechanical structure, the sealing of the oil cylinder is easy to damage under the high temperature condition, and the failure rate is high.

In order to effectively solve the defects existing in the traditional tapping device, the maintenance cost and the failure rate are reduced, and the novel tapping device which has high reliability and high tapping efficiency and simultaneously has low maintenance cost is required to be innovated.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an investment casting shell roasting furnace tapping device that operation is reliable, operating efficiency is high, low cost of maintenance.

The technical scheme of the utility model is realized like this: the utility model provides an investment casting die shell bakes burning furnace device of coming out of stove over a slow fire, include:

the roasting furnace is arranged in a through manner;

the track is laid in the roasting furnace, and two ends of the track respectively extend towards the inlet and the outlet of the roasting furnace;

the kiln car is arranged on the track and can enter and exit the roasting furnace along the track;

the operation platforms are arranged on two sides of the track along the outlet direction of the roasting furnace;

the gear rack transmission mechanism is arranged below the operating platform;

and the actuating mechanism comprises a stress device arranged below the kiln car and a force application device arranged on the gear rack transmission mechanism, and the force application device applies force to the stress device under the driving of the gear rack transmission mechanism so as to enable the kiln car to move from the roasting furnace to the pouring operation area.

On the basis of the technical scheme, it is preferred that rack and pinion drive mechanism is provided with two pairs, and the symmetry sets up the operation platform below in the track both sides, rack and pinion drive mechanism includes slide rail, the dolly of coming out of the furnace, driving motor, spur rack and gear, wherein, the slide rail is fixed to be set up in the operation platform below, and arranges along the track direction, and the spur rack is fixed to be set up at track one side lower surface, and the dolly of coming out of the furnace and slide rail sliding connection, driving motor and dolly bottom fixed connection of coming out of the furnace, and driving motor's output shaft passes through reduction gear and gear fixed connection, and the gear is connected with the spur rack meshing.

Further, preferably, the tapping trolley comprises a trolley body, at least two transmission shafts are fixedly arranged on the trolley body, two ends of each transmission shaft are respectively and rotatably connected with a travelling wheel, and the travelling wheels are in sliding connection with the sliding rails.

On the basis of the technical scheme, preferably, the kiln car is further provided with a roasting carrier for carrying the formwork, and the bottom of the kiln car is provided with a pulley which is in sliding connection with the rail.

On the basis of the technical scheme, preferably, the actuating mechanism is provided with two pairs which are symmetrically arranged along the central axis of the kiln car, the force application device comprises a connecting piece and a pushing piece, one end of the connecting piece is horizontally and fixedly arranged at the bottom of the furnace discharge trolley, the other end of the connecting piece extends towards the bottom of the kiln car, and the pushing piece is fixedly arranged at the other end of the connecting piece and extends towards the bottom of the kiln car; the stress device comprises a fixed plate, a movable stop block and a limiting part, the fixed plate is vertically and fixedly installed on the lower surface of the kiln car, the fixed plate is provided with an installation surface, the installation surface faces the force application device, the upper end of the movable stop block is rotatably connected with the installation surface of the fixed plate, the lower end of the movable stop block vertically faces downwards and extends out of the bottom of the fixed plate, the projection of the movable stop block in the vertical direction is intersected with the projection of the pushing piece in the horizontal direction, the limiting part is fixedly installed on the installation surface where the upper end of the movable stop block is located, and the limiting part is arranged on one.

On the basis of the technical scheme, preferably, a first position sensor is arranged on the side wall of an operating platform where the outlet of the roasting furnace is located, and is used for acquiring position signals of a movable stop block in a stress device on a kiln car to be discharged, a second position sensor is arranged at the bottom of the operating platform where the first position sensor is far away from the discharging direction and is used for acquiring position signals of a pushing piece in a force application device on a rack and pinion transmission mechanism, a plurality of detection units for detecting a pouring station are arranged on the operating platform where the discharging direction is located at intervals, each detection unit comprises a third position sensor and an operation button for detecting the position of the kiln car entering the pouring station, and a PLC (programmable logic controller) installed on the operating platform and electrically connected with the first position sensor, the second position sensor, the third position sensor and the operation button respectively, Control button and driving motor.

The utility model discloses a have following beneficial effect for prior art:

(1) the utility model discloses an investment casting die shell bakes burning furnace tapping device over a slow fire, through setting up rack and pinion drive mechanism, and the installation of hidden installation in the operation platform below, possible enough length because of rack and pinion transmission stroke, be enough to satisfy to cultivate to the molten steel pouring and rotate the stroke, and through set up force applying device on rack and pinion drive mechanism, can make rack and pinion drive mechanism when being linear motion, force applying is carried out to the atress device of kiln car below through driving force applying device, thereby can promote the pouring operation district smoothly with kiln car from roasting the burning furnace tapping hole over a slow fire. In addition, the gear rack transmission mechanism is arranged below the operating platform in a hidden mode, so that the damage to the gear rack caused by splashing of molten steel during pouring is avoided, the reliability of a discharging system is improved, and the shutdown time of the device is shortened.

(2) Under normal working conditions, the bilateral gear rack transmission mechanism and the actuating mechanism work simultaneously to improve the stability of the discharging process, and when the discharging device needs to be overhauled or the unilateral gear rack transmission mechanism breaks down, the gear rack transmission mechanism on the other side can be used to ensure uninterrupted production, so that the reliability and flexibility of the discharging system are substantially improved, the maintenance cost is further reduced, and the production efficiency is improved.

(3) The roasting furnace discharging device can also realize the fixed-point conveying function according to the requirement, the molten steel transferring distance is greatly shortened, the molten steel can directly reach the pouring station, the production efficiency is greatly improved, and the waiting time of the molten steel smelting process and the ton capacity consumption are reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a top view of a discharging device of a roasting furnace disclosed by the present invention;

FIG. 2 is a front view of the discharging device of the roasting furnace disclosed by the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

FIG. 4 is a schematic view of the working state of the tapping device disclosed by the present invention;

fig. 5 is a schematic view of the position of the photoelectric sensor of the tapping device disclosed by the utility model.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

As shown in fig. 1, with reference to fig. 2, the utility model discloses an investment casting shell bakes burning furnace tapping device over a slow fire, include:

the through type roasting furnace 1 is used for roasting the formwork at a high temperature.

A track 2 which is laid in the roasting furnace 1, and two ends of the track respectively extend towards the inlet and the outlet of the roasting furnace 1; the mould shell to be roasted can be loaded on the kiln car 3 through the rail 2, and is sent into the roasting furnace 1 from the inlet through the guide of the rail 2 to carry out high-temperature roasting operation, and after the roasting operation is finished, the mould shell is pushed out through the outlet of the roasting furnace 1 and is moved to a pouring operation area to carry out molten steel pouring operation.

Kiln car 3 for load wait to roast the shell of touching of burning, kiln car 3 chooses high temperature resistant metal material for use usually, and kiln car 3 sets up on track 2, adopts hydraulic cylinder to promote kiln car 3 and gets into roasting furnace 1 on track 2 usually.

And the operating platform 4 is arranged on two sides of the track 2 along the outlet direction of the roasting furnace 1, so that operators can conveniently stand on two sides of the operating platform 4 to carry out molten steel pouring operation on the formwork loaded with the kiln car 3 after being discharged from the furnace. In this embodiment, the operating platform 4 is an inverted "L" shape, which facilitates the hidden installation of the rack-and-pinion transmission mechanism 5 described below.

And the gear rack transmission mechanism 5 is installed below the operating platform 4 in a hidden manner and is used for making linear motion.

The actuating mechanism 6 comprises 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, and the force applying device 62 applies force to the force receiving device 61 under the driving of the gear rack transmission mechanism 5 so as to move the kiln car 3 from the roasting furnace 1 to the pouring operation area.

By adopting the technical scheme, the mould shell is loaded on the kiln car 3, enters the roasting furnace 1 through the track 2, is pushed out to the outlet of the roasting furnace 1 by the hydraulic oil cylinder after finishing high-temperature roasting of the mould shell, at the moment, the kiln car 3 is pushed out from the roasting furnace 1 and moves to a pouring station because the kiln car 3 is in a high-temperature state, the stroke is large, if the hydraulic oil cylinder is continuously used for carrying out linear transmission on the kiln car 3, the stroke is insufficient, and the molten steel temperature is high during pouring of the molten steel, the sealing of the hydraulic oil cylinder can be damaged. If chain transmission is adopted, the falling of the splashed molten steel or steel slag in the pouring process can cause chain damage or transmission clamping stagnation, and further cause shutdown and production halt. Therefore the utility model discloses a hidden gear rack drive mechanism 5 that sets up in 4 below of operation platform, by following advantage: firstly, the gear rack transmission stroke can be made to be long enough, usually 5m-150m, enough to meet the pouring rotation stroke of the molten steel after the roasting, and the force application device 62 is arranged on the gear rack transmission mechanism 5, so that the gear rack transmission mechanism 5 can do linear motion, and meanwhile, the force application device 62 is driven to apply force to the force receiving device 61 below the kiln car 3, so that the kiln car 3 can be smoothly pushed to the pouring operation area from the outlet of the roasting furnace 1. Secondly, the gear rack transmission mechanism 5 is arranged below the operating platform 4 in a hidden mode, damage to a gear rack caused by splashing during molten steel pouring is avoided, the reliability of a discharging system is improved, and the shutdown time of the device is shortened.

The utility model discloses still realize through following technical scheme.

Referring to fig. 3, the rack and pinion transmission mechanism 5 is provided with two pairs, and is symmetrically arranged below the operation platforms 4 at two sides of the track 2.

By adopting the technical scheme, the gear and rack transmission mechanisms 5 are respectively arranged below the operating platforms 4 on two sides of the track 2, when the gear and rack transmission mechanisms 5 do linear motion, the two pairs of gear and rack transmission mechanisms 5 simultaneously drive the corresponding force application devices 62 to apply force to the force application devices 61 on two sides below the kiln car 3, so that the kiln car 3 can be more stably pushed to a pouring station from the outlet of the roasting furnace 1, the structure is more balanced in stress, and the fatigue damage of the gear and rack transmission mechanisms 5 on one side is avoided. Meanwhile, when the discharging device needs to be overhauled or the single-side rack-and-pinion transmission mechanism 5 breaks down, the rack-and-pinion transmission mechanism 5 on the other side can be used for ensuring uninterrupted production, so that the reliability and the flexibility of the discharging system are substantially improved, the maintenance cost is further reduced, and the production efficiency is improved.

In this embodiment, the rack and pinion transmission mechanism 5 includes a slide rail 51, a tapping trolley 52, a driving motor 53, a spur rack 54 and a gear 55, wherein the slide rail 51 is fixedly disposed below the operating platform 4 and arranged along the direction of the rail 2, the spur rack 54 is fixedly disposed on the lower surface of one side of the rail 2, the tapping trolley 52 is slidably connected to the slide rail 51, the driving motor 53 is fixedly connected to the bottom of the tapping trolley 52, an output shaft of the driving motor 53 is fixedly connected to the gear 55 through a speed reducer, and the gear 55 is engaged with the spur rack 54.

By adopting the technical scheme, the driving motor 53 rotates through the speed reducer driving gear 55 in the rotating process, the gear 55 is in meshing transmission with the spur rack 54 in the rotating process, and the spur rack 54 is relatively fixed with the sliding rail 51, and the sliding rail 51 is fixedly connected with the operating platform 4, so that the driving motor can be driven to drive the tapping trolley 52 to do linear motion along the sliding rail 51 according to the meshing transmission process of the gear 55 and the spur rack 54. The gear 55 is adopted for transmission, so that higher transmission precision can be obtained, the transmission power is large, the service life is long, the work is stable, the reliability is high, and the constant transmission ratio can be ensured.

Further, preferably, the tapping trolley 52 comprises a trolley body 521, at least two transmission shafts 522 are fixedly arranged on the trolley body 521, two ends of each transmission shaft 522 are respectively and rotatably connected with a travelling wheel 523, and the travelling wheels 523 are slidably connected with the slide rails 51. Because of rack and pinion is in the driven, drive driving motor 53 and do linear motion, and then driving motor 53 drives the dolly 52 that goes out of the stove and slides on slide rail 51, through setting up dolly body 521 to set up two at least transmission shafts 522, can make dolly body 521 and track 2 keep horizontal linear motion, many transmission shafts 522 drive the driving travelling wheel 523 and slide on slide rail 51 simultaneously, make the dolly 52 that goes out of the stove move more steadily on slide rail 51.

In some preferred embodiments, the kiln car 3 is further provided with a roasting carrier 31 for carrying a formwork, and the bottom of the kiln car 3 is provided with a pulley 32 in sliding connection with the rail 2. Through setting up calcination carrier 31, convenient direct calcination carrier 31 that will load the good mould shell is directly placed and is carried out the calcination on kiln car 3, also is convenient for carry out whole transport and transportation to the mould shell after the play stove. At least two groups of pulleys 32 are arranged at the bottom of the kiln car 3, so that the kiln car 3 can be ensured to run stably on the track 2.

In this embodiment, the actuators 6 are provided in two pairs and are symmetrically arranged along the central axis of the kiln car 3.

By adopting the structure, the two pairs of gear 55 and rack transmission mechanisms 5 are matched for synchronous use, when one pair of actuating mechanisms 6 needs to be overhauled or breaks down, the other actuating mechanism 6 can be used for ensuring uninterrupted production, so that the reliability and the flexibility of the discharging system are substantially improved, the maintenance cost is further reduced, and the production efficiency is improved.

Referring to fig. 3 and 4, in the present 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, the other end extends towards the bottom of the kiln car 3, and 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 stress device 61 comprises a fixing plate 611, a movable 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 facing the force application device 62, the upper end of the movable block 612 is rotatably connected with the installation surface of the fixing plate 611, the lower end of the movable block 612 vertically faces downward and extends out of the bottom of the fixing plate 611, the projection of the movable block 612 in the vertical direction is intersected 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 block 612 is located, and the limiting piece 613 is arranged on the side of the movable block 612 where.

By adopting the above technical scheme, in the initial state, because the upper end of the movable stopper 612 is rotatably connected with the fixing plate 611, the lower end of the movable stopper 612 is vertically downward under the action of gravity. Since the stopper 613 is disposed on the side of the movable stopper 612 away from the outlet of the roaster 1 and the stopper 613 is disposed at the upper end of the movable stopper 612, the kiln car 3 can be pushed to the pouring station from the outlet when the force applying device 62 is required to apply a force to the force receiving device 61. The method can be realized by firstly driving the gear 55 to rotate anticlockwise through the reverse rotation of the driving motor 53, and approaching the discharging trolley 52 along the slide rail 51 towards the kiln car 3 under the transmission of the gear rack. The discharging trolley 52 moves linearly and simultaneously drives the connecting piece 621 to move linearly, and the pushing piece 622 at the end of the connecting piece 621 synchronously approaches the stress device 61 at the bottom of the kiln car 3. The pushing member 622 pushes the movable stopper 612 to rotate clockwise, and after the connecting member 621 is separated from the movable stopper 612, the movable stopper 612 rotates by its own weight to return to the vertical state. At this time, the driving motor 53 rotates forward, the driving motor 53 drives the gear 55 to rotate clockwise, and the tapping trolley 52 moves to the casting station along the slide rail 51 under the transmission of the gear rack. The tapping trolley 52 drives the pushing member 622 on the force application device 62 to slowly approach the movable stop block 612 on the force receiving device 61, and the pushing member 622 can push the movable stop block 612 and simultaneously make the movable stop block 612 unable to rotate counterclockwise due to the setting of the limiting member 613, so that the force application device 62 applies force to the force receiving device 61 to push the kiln car 3 to move to the pouring station.

The actuating mechanism 6 is simple in structure, convenient to operate and convenient to maintain. When the power transmission mechanism is matched with the gear rack transmission mechanism 5, the power transmission performance is improved, and the power transmission is stable.

Referring to fig. 5, in the embodiment of the present invention, a first position sensor 7 is disposed on a side wall of an operation platform 4 at an outlet of a baking furnace 1 for obtaining a position signal of a movable stop 612 in a stress device 61 on a kiln car 3 to be discharged, a second position sensor 8 is disposed at a bottom of the operation platform 4 where the first position sensor 7 is far away from a discharging direction for obtaining a position signal of a pushing member 622 in a force applying device 62 on a rack transmission mechanism 5 of a gear 55, a plurality of detecting units 9 for detecting a pouring station are disposed at intervals on the operation platform 4 where the discharging direction is located, each detecting unit 9 includes a third position sensor 91 and an operation button 92 for detecting a position of the kiln car entering the pouring station, and further includes a PLC controller 10 mounted on the operation platform 4, the PLC controller 10 is electrically connected to the first position sensor 7, A second position sensor 8, a third position sensor 91, a manipulation button 92, and a driving motor 53.

By adopting the technical scheme, after an operation button 92 on any one casting station in the tapping direction sends a command requesting tapping, the PLC 10 controls the opening of the furnace door of the roasting furnace 1, when the first kiln car 3 is pushed to the outlet of the roasting furnace 1 by the hydraulic cylinder, when the first position sensor 7 detects the movable stop 612 at the bottom of the first kiln car 3, the first position sensor 7 transmits a signal to the PLC 10, the PLC 10 drives the driving motor 53 to rotate reversely, the tapping trolley 52 moves to the first kiln car 3 under the transmission of the gear 55 and the rack, and after a pushing piece 622 on the tapping trolley 52 passes over the movable stop 612 at the bottom of the first kiln car 3 and is detected by the second position sensor 8, the PLC 10 drives the driving motor 53 to rotate forwards, and the tapping trolley 52 moves to the casting station which currently sends the command request under the transmission of the gear and rack, in the moving process of the tapping trolley 52, the pushing piece 622 pushes the movable stop block 612 at the bottom of the first kiln car 3, so that the first kiln car 3 is pushed to the current casting station which sends out the instruction request, and after the first kiln car 3 is detected by the third position sensor 91 on the current casting station, the PLC controller 10 controls the driving motor 53 to stop rotating. In order to better implement the control of the transfer stroke by the PLC control, the tapping trolley 52 stays at a fixed waiting point between the outlet of the roasting furnace 1 and the pouring station in the initial state. After the first kiln car 3 finishes pushing, the PLC controller 10 drives the discharging trolley 52 to return to a fixed waiting point along the slide rail 51, thereby waiting for the next discharging request to be sent out. Suppose that a No. 1 pouring station, a No. 2 pouring station and a No. 3 pouring station are arranged in sequence along the tapping direction. When the kiln car 3 at the No. 1 pouring station finishes molten steel pouring and needs to carry out pouring operation at the No. 2 pouring station, the second kiln car 3 can push the first kiln car 3 to leave the No. 2 pouring station, so that the second kiln car 3 is positioned at the No. 2 pouring station. When the No. 1 pouring station, the No. 2 pouring station and the No. 3 pouring station are occupied by the kiln cars 3, the newly discharged kiln cars 3 push the 3 kiln cars 3 to move away from the appointed pouring station, so that the kiln cars 3 can carry out line switching operation.

In the above embodiment, the first position sensor 7, the second position sensor 8, and the third position sensor 91 may be photoelectric sensors or proximity switches.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The utility model provides an investment casting die shell bakes burning furnace device of coming out of stove which characterized in that includes:

the roasting furnace (1) is arranged in a through manner;

the track (2) is laid in the roasting furnace (1), and two ends of the track respectively extend towards the inlet and the outlet of the roasting furnace (1);

the kiln car (3) is arranged on the track (2) and can enter and exit the roasting furnace (1) along the track (2);

the operation platforms (4) are arranged on two sides of the track (2) along the outlet direction of the roasting furnace (1);

the gear rack transmission mechanism (5) is arranged below the operating platform (4);

the actuating mechanism (6) comprises a stress device (61) arranged below the kiln car (3) and a force application device (62) arranged on the gear rack transmission mechanism (5), and the force application device (62) applies force to the stress device (61) under the driving of the gear rack transmission mechanism (5) so that the kiln car (3) moves to the pouring operation area from the outlet of the roasting furnace (1).

2. The tapping device of an investment casting shell roaster of claim 1, wherein: gear rack drive (5) are provided with two pairs, and the symmetry sets up operation platform (4) below in track (2) both sides, gear rack drive (5) include slide rail (51), discharge trolley (52), driving motor (53), spur rack (54) and gear (55), wherein, slide rail (51) are fixed to be set up in operation platform (4) below, and arrange along track (2) direction, and spur rack (54) are fixed to be set up at track (2) one side lower surface, discharge trolley (52) and slide rail (51) sliding connection, driving motor (53) and discharge trolley (52) bottom fixed connection, and the output shaft of driving motor (53) passes through reduction gear and gear (55) fixed connection, and gear (55) and spur rack (54) meshing are connected.

3. The tapping device for an investment casting shell roaster of claim 2, wherein: the discharging trolley (52) comprises a trolley body (521), at least two transmission shafts (522) are fixedly arranged on the trolley body (521), two ends of each transmission shaft (522) are respectively and rotatably connected with a travelling wheel (523), and the travelling wheels (523) are in sliding connection with sliding rails (51).

4. The tapping device of an investment casting shell roaster of claim 1, wherein: the kiln car (3) is also provided with a roasting carrier (31) for carrying the formwork, and the bottom of the kiln car (3) is provided with a pulley (32) which is connected with the rail (2) in a sliding way.

5. The tapping device for an investment casting shell roaster of claim 2, wherein: the two pairs of actuating mechanisms (6) are arranged and symmetrically arranged along the central axis of the kiln car (3), the force application device (62) comprises a connecting piece (621) and a pushing piece (622), one end of the connecting piece (621) is horizontally and fixedly arranged at the bottom of the furnace discharge trolley (52), the other end of the connecting piece extends towards the bottom of the kiln car (3), and the pushing piece (622) is fixedly arranged at the other end of the connecting piece (621) and extends towards the bottom of the kiln car (3); the stress device (61) comprises a fixing plate (611), a movable 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) is provided with an installation surface, the installation surface faces the force application device (62), the upper end of the movable block (612) is rotatably connected with the installation surface of the fixing plate (611), the lower portion of the movable block (612) faces downwards vertically and extends out of the bottom of the fixing plate (611), the projection of the movable block (612) in the vertical direction is intersected 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 block (612) is located, and the limiting piece (613) is arranged on one side of the movable block (612) where the outlet of the roasting furnace.

6. The tapping device for an investment casting shell roaster of claim 4, wherein: a first position sensor (7) is arranged on the side wall of an operating platform (4) at the outlet of the roasting furnace (1) and is used for acquiring position signals of a movable stop block (612) in a stress device (61) on a kiln car (3) to be discharged, a second position sensor (8) is arranged at the bottom of the operating platform (4) at which the first position sensor (7) is far away from the discharging direction and is used for acquiring position signals of a pushing piece (622) in a force application device (62) on a rack transmission mechanism (5) of a gear (55), a plurality of detection units (9) for detecting a pouring station are arranged on the operating platform (4) at intervals in the discharging direction, each detection unit (9) comprises a third position sensor (91) and an operation button (92) for detecting the position of the kiln car entering the pouring station, and a PLC (10) arranged on the operating platform (4), the PLC (10) is respectively and electrically connected with a first position sensor (7), a second position sensor (8), a third position sensor (91), an operation button (92) and a driving motor (53).

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