A heat treatment apparatus and method for stainless steel investment casting

Abstract

The application discloses a kind of heat treatment equipment and method for stainless steel investment casting, it is related to investment casting technical field.The kind of heat treatment equipment for stainless steel investment casting, including setting in the conveyor of bottom plate top, and conveyor includes conveying belt, the top of bottom plate is connected with preheating cover by lifting module, and the sidewall of preheating cover is fixedly connected with connecting block.The kind of heat treatment equipment and method for stainless steel investment casting, waste gas generated by casting can be collected, at the same time, waste heat of waste gas can be used to preheat shell mold, not only can improve the quality of subsequent casting, but also can recycle waste heat during casting, more energy saving and environmental protection;During casting, external air can be prevented from entering hollow cover, at the same time, gas in hollow cover and shell mold can be easily discharged, to ensure casting quality;Reciprocating knock vibration is carried out to the bottom of conveying belt, which can reciprocatingly vibrate shell mold, thereby improving the quality of casting.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of investment casting, in particular to a heat treatment equipment and method for stainless steel investment casting. BACKGROUND

[0002] The investment casting method is a precision casting process based on a polystyrene foam prototype. Through high-temperature molten metal replacement of gasified foam, it realizes the cavity-free forming of complex components (such as stainless steel automobile parts). It is especially suitable for the forming of high-melting-point alloys such as stainless steel. Under the background of intelligent manufacturing, the process is deeply integrated with intelligent casting island. Relying on automated modeling, robot pouring and online detection system, it realizes efficient continuous production.

[0003] However, in the current casting molding process, the shell mold is usually directly poured without preheating, and the temperature difference between the inside and outside of the mold shell is significant (external rapid cooling / internal high temperature retention), which can induce shrinkage, hot cracking and other forming defects. In addition, during pouring, toxic waste gas such as styrene, CO generated by gasification of foam plastic and metal oxide particles will cause VOCs pollution and carbon emissions. The waste heat generated during the pouring process (waste gas temperature can reach 400~600℃) will also be wasted, which is contrary to the energy saving and emission reduction goal required by the intelligent casting island.

[0004] Therefore, a heat treatment equipment and method for stainless steel investment casting are proposed to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a heat treatment equipment and method for stainless steel investment casting to solve the problems raised in the background.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a heat treatment equipment for stainless steel investment casting, comprising a conveyor arranged on the top of a base plate, and the conveyor comprising a conveyor belt;

[0007] The top of the base plate is connected with a preheating cover through a lifting module, the side wall of the preheating cover is fixedly connected with a connecting block, the side wall of the connecting block is fixedly connected with a hollow cover, and the inner side wall of the hollow cover is provided with an annular groove;

[0008] The top of the base plate is fixedly connected with a first supporting block, the top of the first supporting block is fixedly connected with a fixed cover, the fixed cover is slidably connected with a sliding plate, and a first moving module is arranged between the sliding plate and the base plate;

[0009] The connecting pipe is fixedly connected between the hollow cover and the preheating cover, the soft pipe is fixedly connected between the preheating cover and the fixed cover, the first one-way valve is arranged in the soft pipe, the gas storage tank is fixedly connected to the top of the base plate, the gas collecting pipe is fixedly connected between the gas storage tank and the fixed cover, and the second one-way valve is arranged in the gas collecting pipe.

[0010] Preferably, the sealing plate is inserted into the hollow cover, and a connecting frame is fixedly connected between the sealing plate and the bottom plate, a casting pipe is fixedly inserted into the top of the sealing plate, a hopper is fixedly connected to the upper end of the casting pipe, a cover plate is rotatably connected to the top of the hopper through a rotating mechanism, an opening and closing mechanism is arranged on the side wall of the casting pipe, and a vibrating mechanism for vibrating the shell mold is arranged below the conveying belt.

[0011] Preferably, the opening and closing mechanism comprises a working cover fixedly inserted into the side wall of the casting pipe, the working cover is in communication with the casting pipe, a partition plate is slidably connected into the working cover, a connecting plate is connected to the side wall of the working cover through a second moving module, and the connecting plate is fixed to the side wall of the partition plate.

[0012] Preferably, the rotating mechanism comprises two symmetrical L-shaped blocks fixedly connected to the side wall of the hopper, a rotating block is rotatably connected to the side wall of the L-shaped block through a rotating shaft, the rotating block is fixed to the side wall of the cover plate, and the rotation of the rotating shaft is driven by a driving mechanism.

[0013] Preferably, the driving mechanism comprises a gear fixedly sleeved on the side wall of the rotating shaft, a rack is connected to the side wall of the L-shaped block through a first reset mechanism, the rack is in meshing arrangement with the gear, and the movement of the rack is pushed by a first pushing mechanism.

[0014] Preferably, the first reset mechanism comprises two symmetrical second supporting blocks fixedly connected to the side wall of the L-shaped block, two symmetrical guide rods are fixedly connected to the opposite side walls of the two second supporting blocks, a sliding block is sleeved on the side wall of each guide rod, the sliding block is fixed to the side wall of the rack, and a first spring is sleeved on the side wall of each guide rod.

[0015] The first pushing mechanism comprises an L-shaped plate fixedly connected to the side wall of the rack, an inclined plate is fixedly connected to the lower end of the L-shaped plate, and a flat plate is fixedly connected to the other end of the inclined plate.

[0016] Preferably, the vibrating mechanism comprises a moving plate, a plurality of arrayed rubber rods are fixedly connected to the top of the moving plate, the moving plate is connected to the top of the bottom plate through a second reset mechanism, and the movement of the moving plate is pushed by a second pushing mechanism.

[0017] Preferably, the second reset mechanism comprises a fixed plate fixedly connected to the top of the bottom plate, an installation plate is fixedly connected to the side wall of the fixed plate, two symmetrical T-shaped guide rods are inserted into the bottom of the installation plate, the upper end of the T-shaped guide rod is fixed to the bottom of the moving plate, and a second spring is sleeved on the side wall of each T-shaped guide rod.

[0018] Preferably, the second pushing mechanism comprises a fixed pin fixedly connected to the bottom of the moving plate, and the side wall of the sliding plate is fixedly connected with a connecting rod, one end of the connecting rod is provided through the side wall of the fixed cover, and the top of the connecting rod is fixedly connected with a plurality of triangular blocks arranged in an array.

[0019] A heat treatment method for stainless steel investment casting using the heat treatment equipment for stainless steel investment casting, comprising the following steps:

[0020] S1: when casting, the shell mold is placed on the conveying belt for conveying, and when conveyed to below the preheating cover and the hollow cover, the preheating cover is driven downward by the lifting module, and at the same time, the hollow cover is driven downward by the connecting block, so that the hollow cover can cover the preheated shell mold and leave a gap between the inner wall of the hollow cover and the shell mold, and the preheating cover can cover the unpreheated shell mold;

[0021] S2: then, the metal melt is poured into the hopper, and after the metal melt is poured into the hopper, it enters the casting pipe and is above the partition plate, then the connecting plate is driven to move by the second moving module, and the partition plate is driven to move away from the working cover, so as to open the casting pipe, at this time, the metal melt in the hopper can enter the shell mold through the casting pipe, and when the connecting plate moves, it can slide along the bottom of the inclined plate to the bottom of the flat plate, so as to push the rack upward through the L-shaped plate, and at the same time, the first spring is compressed, when the rack moves upward, it can drive the gear to rotate counterclockwise, and the cover plate is driven to rotate and close by the rotating shaft and the rotating block, so as to seal the top of the hopper, avoid external air entering the hollow cover, ensure the casting quality, and avoid waste of heat;

[0022] S3: then, the metal melt enters the shell mold through the casting pipe, at the same time, the sliding plate is driven to move away from the fixed cover by the first moving module, the first one-way valve is opened, and the second one-way valve is closed, at this time, the hot gas generated during casting can enter the hollow cover through the gap and the annular groove, at this time, the outer wall of the shell mold can be heated, the quality of casting can be improved, then the connecting pipe enters the preheating cover, at this time, the shell mold to be preheated can be preheated, not only can improve the quality of subsequent casting, but also can recycle the waste heat during casting, more energy-saving and environment-friendly, the preheated waste gas can enter the fixed cover through the hose for temporary storage;

[0023] S4: when the sliding plate moves, the triangular block can be driven to move through the connecting rod, when the triangular block abuts against the lower end of the fixed pin, the moving plate and the rubber rod can be pushed to move upward, at the same time, the second spring is compressed, when the triangular block passes the fixed pin, the moving plate and the rubber rod can move downward to reset under the action of the second spring, so as to reciprocate, so that the rubber rod reciprocatingly knocks and vibrates the bottom of the conveying belt, thereby the shell mold can be reciprocatingly vibrated, and the quality of casting can be improved;

[0024] S5: after the casting is completed, the sliding plate is driven to move into the fixed cover through the first moving module, at this time, the exhaust gas temporarily stored in the fixed cover can be extruded, at the same time, the first one-way valve is closed, and the second one-way valve is opened, at this time, the exhaust gas temporarily stored in the fixed cover can be extruded into the gas storage tank through the gas collecting pipe for collection, so as to avoid the escape of the exhaust gas, and the health and environmental protection are better, and the gas between the hollow cover and the shell mold can be discharged, and the quality of casting can be improved.

[0025] Compared with the prior art, the beneficial effects of the present application are:

[0026] The heat treatment equipment and method for stainless steel investment casting, by setting the fixed cover and the like, when casting, the shell mold is placed on the conveying belt for conveying, when conveyed to the lower side of the preheating cover and the hollow cover, the preheating cover is driven to move downward by the lifting module, at the same time, the hollow cover is driven to move downward by the connecting block, so that the hollow cover can cover the preheated shell mold and leave a gap between the inner wall of the hollow cover and the shell mold, the preheating cover can cover the shell mold which is not preheated, then the metal melt is poured into the hopper, then the metal melt enters the shell mold through the casting pipe, at the same time, the sliding plate is driven to move away from the fixed cover by the first moving module, the first one-way valve is opened, and the second one-way valve is closed, at this time, the hot gas generated during casting can enter the hollow cover through the gap and the annular groove, at this time, the outer wall of the shell mold can be heated, the quality of casting can be improved, then the connecting pipe enters the preheating cover, at this time, the shell mold to be preheated can be preheated, not only the quality of subsequent casting can be improved, but also the waste heat during casting can be recycled, more energy-saving and environmental protection, the preheated exhaust gas can enter the fixed cover through the hose for temporary storage, after the casting is completed, the sliding plate is driven to move into the fixed cover through the first moving module, at this time, the exhaust gas temporarily stored in the fixed cover can be extruded, at the same time, the first one-way valve is closed, and the second one-way valve is opened, at this time, the exhaust gas temporarily stored in the fixed cover can be extruded into the gas storage tank through the gas collecting pipe for collection, so as to avoid the escape of the exhaust gas, and the health and environmental protection are better, and the gas between the hollow cover and the shell mold can be discharged, and the quality of casting can be improved.

[0027] The stainless steel investment casting heat treatment equipment and method, through the setting opening and closing mechanism and rotating mechanism, after the metal melt is poured into the hopper, enters the pouring pipe and is above the baffle, then, the connecting plate is moved by the second moving module, and the baffle is moved away from the working cover, so that the pouring pipe is opened, at this time, the metal melt in the hopper can enter the shell mold through the pouring pipe, and when the connecting plate moves, it can slide along the bottom of the inclined plate to the bottom of the flat plate, so that the rack is pushed upward by the L-shaped plate, at the same time, the first spring is compressed, when the rack moves upward, the gear is pushed to rotate counterclockwise, and the cover plate is driven to rotate and close by the rotating shaft and rotating block, so that the top of the hopper is sealed, the external air is prevented from entering the hollow cover, the casting quality is ensured, and the waste of heat is avoided.

[0028] The stainless steel investment casting heat treatment equipment and method, through the setting vibration mechanism, when the sliding plate moves, the triangular block is moved by the connecting rod, when the triangular block abuts against the lower end of the fixed pin, the moving plate and the rubber rod are pushed to move upward, at the same time, the second spring is compressed, when the triangular block passes the fixed pin, the moving plate and the rubber rod can move downward under the action of the second spring and reset, so that the rubber rod reciprocatingly knocks and vibrates the bottom of the conveying belt, so that the shell mold is reciprocatingly vibrated, and the casting quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the overall structure schematic diagram of the present application;

[0030] Figure 2 It is the overall structure schematic diagram of another perspective of the present application;

[0031] Figure 3 It is the partial sectional structure schematic diagram of the preheating cover and the hollow cover in the present application;

[0032] Figure 4 It is the partial sectional structure schematic diagram of the working cover in the present application;

[0033] Figure 5 It is Figure 2 The enlarged structure schematic diagram of A in the middle;

[0034] Figure 6 It is Figure 3 The enlarged structure schematic diagram of B in the middle;

[0035] Figure 7 It is Figure 4 The enlarged structure schematic diagram of C in the middle;

[0036] Figure 8 It is Figure 7An enlarged structural schematic view at D;

[0037] Figure 9 For Figure 8 An enlarged structural schematic view at E.

[0038] In the figure: 1, bottom plate; 201, work cover; 202, partition; 203, second moving module; 204, connecting plate; 301, L-shaped block; 302, rotating shaft; 303, rotating block; 401, gear; 402, rack; 501, second support block; 502, guide rod; 503, sliding block; 504, first spring; 601, L-shaped plate; 602, inclined plate; 603, flat plate; 701, moving plate; 702, rubber rod; 801, fixed plate; 802, mounting plate; 803, T-shaped guide rod; 804, second spring; 901, fixed pin; 902, connecting rod; 903, triangular block; 10, conveyor; 1001, conveying belt; 11, lifting module; 12, preheating cover; 13, connecting block; 14, hollow cover; 15, annular groove; 16, sealing plate; 17, connecting frame; 18, first support block; 19, fixed cover; 20, sliding plate; 21, first moving module; 22, connecting pipe; 23, hose; 24, gas collecting pipe; 25, gas storage tank; 26, casting pipe; 27, hopper; 28, cover plate. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0040] Please refer to Figures 1-9 The present application provides a technical solution: a heat treatment equipment for stainless steel investment casting, comprising a conveyor 10 arranged on the top of a bottom plate 1, and the conveyor 10 comprises a conveying belt 1001;

[0041] The top of the bottom plate 1 is connected with a preheating cover 12 through a lifting module 11, the side wall of the preheating cover 12 is fixedly connected with a connecting block 13, the side wall of the connecting block 13 is fixedly connected with a hollow cover 14, and the inner side wall of the hollow cover 14 is provided with an annular groove 15;

[0042] The top of the bottom plate 1 is fixedly connected with a first support block 18, the top of the first support block 18 is fixedly connected with a fixed cover 19, the fixed cover 19 is slidably connected with a sliding plate 20, and the first moving module 21 is arranged between the sliding plate 20 and the bottom plate 1;

[0043] The connecting pipe 22 is fixedly connected between the hollow cover 14 and the preheating cover 12, the hose 23 is fixedly connected between the preheating cover 12 and the fixed cover 19, the first one-way valve is arranged in the hose 23, the conduction direction of the first one-way valve is from the preheating cover 12 to the fixed cover 19, the gas tank 25 is fixedly connected to the top of the bottom plate 1, the gas collecting pipe 24 is fixedly connected between the gas tank 25 and the fixed cover 19, the second one-way valve is arranged in the gas collecting pipe 24, and the conduction direction of the second one-way valve is from the fixed cover 19 to the gas tank 25;

[0044] The waste gas generated by casting can be collected, and the waste heat of the waste gas can be used for preheating the shell mold, which can improve the quality of subsequent casting, and the waste heat during casting can be recycled and reused, which is more energy-saving and environment-friendly. During casting, external air can be prevented from entering the hollow cover 14, and the gas in the hollow cover 14 and the shell mold can be easily discharged, thereby ensuring the casting quality.

[0045] The sealing plate 16 is inserted into the hollow cover 14, the connecting frame 17 is fixedly connected between the sealing plate 16 and the bottom plate 1, the pouring pipe 26 is fixedly inserted into the top of the sealing plate 16, the hopper 27 is fixedly connected to the upper end of the pouring pipe 26, the cover plate 28 is rotatably connected to the top of the hopper 27 through the rotating mechanism, the opening and closing mechanism is arranged on the side wall of the pouring pipe 26, and the vibration mechanism for vibrating the shell mold is arranged below the conveying belt 1001;

[0046] The bottom of the conveying belt 1001 is reciprocatingly knocked and vibrated, so that the shell mold is reciprocatingly vibrated, thereby improving the quality of casting;

[0047] Please refer to Figure 4 , Figure 6 and Figure 7 , the opening and closing mechanism includes the working cover 201 fixedly inserted into the side wall of the pouring pipe 26, the working cover 201 is in communication with the pouring pipe 26, the baffle 202 is slidably connected in the working cover 201, the connecting plate 204 is connected to the side wall of the working cover 201 through the second moving module 203, and the connecting plate 204 is fixed to the side wall of the baffle 202. The connecting plate 204 is moved by the second moving module 203, so that the baffle 202 slides in the working cover 201, and the opening and closing of the pouring pipe 26 can be realized.

[0048] Please refer to Figure 8 and Figure 9The rotating mechanism comprises two symmetrically arranged L-shaped blocks 301 fixedly connected to the side walls of the hopper 27, the side walls of the L-shaped blocks 301 are rotatably connected with rotating blocks 303 through rotating shafts 302, the rotating blocks 303 are fixed to the side walls of the cover plate 28, and the rotation of the rotating shafts 302 is driven by the driving mechanism. The rotating shafts 302 are driven to rotate by the driving mechanism, the rotation of the rotating shafts 302 drives the rotation of the rotating blocks 303, and thus the cover plate 28 is driven to rotate to be closed or opened.

[0049] Please refer to Figure 9 The driving mechanism comprises a gear 401 fixedly sleeved on the side wall of the rotating shaft 302, the side wall of the L-shaped block 301 is connected with a rack 402 through a first reset mechanism, the rack 402 is arranged in meshing with the gear 401, the movement of the rack 402 is pushed by a first pushing mechanism, the rack 402 is pushed to move by the first pushing mechanism, the movement of the rack 402 drives the rotation of the gear 401, and thus the rotating shaft 302 is driven to rotate.

[0050] Please refer to Figure 9 The first reset mechanism comprises two symmetrically arranged second supporting blocks 501 fixedly connected to the side walls of the L-shaped blocks 301, the opposite side walls of the two second supporting blocks 501 are fixedly connected with two symmetrically arranged guide rods 502, the side wall of each guide rod 502 is sleeved with a sliding block 503, the sliding block 503 is fixed to the side wall of the rack 402, and the side wall of each guide rod 502 is sleeved with a first spring 504, which plays a guiding and resetting role in the movement of the rack 402.

[0051] Please refer to Figures 7-9 The first pushing mechanism comprises an L-shaped plate 601 fixedly connected to the side wall of the rack 402, the lower end of the L-shaped plate 601 is fixedly connected with an inclined plate 602, the other end of the inclined plate 602 is fixedly connected with a flat plate 603, when the connecting plate 204 moves, it can slide along the bottom of the inclined plate 602 to the bottom of the flat plate 603, so as to push the rack 402 to move upward through the L-shaped plate 601.

[0052] Please refer to Figure 5 and Figure 6 The vibrating mechanism comprises a moving plate 701, and a plurality of rubber rods 702 arranged in an array are fixedly connected to the top of the moving plate 701. The moving plate 701 is connected to the top of the bottom plate 1 through a second reset mechanism, and the movement of the moving plate 701 is pushed by a second pushing mechanism. The second reset mechanism and the second pushing mechanism make the moving plate 701 and the rubber rods 702 move up and down reciprocatingly. Such reciprocation can make the rubber rods 702 reciprocatingly knock and vibrate the bottom of the conveying belt 1001, so as to reciprocatingly vibrate the shell mold and improve the quality of casting.

[0053] Please refer to Figure 5 andFigure 6 The second reset mechanism comprises a fixed plate 801 fixedly connected to the top of the bottom plate 1, and the side wall of the fixed plate 801 is fixedly connected with a mounting plate 802, the bottom of the mounting plate 802 is inserted with two symmetrically arranged T-shaped guide rods 803, the upper end of the T-shaped guide rod 803 is fixed to the bottom of the moving plate 701, and the side wall of each T-shaped guide rod 803 is sleeved with a second spring 804, which plays a guiding and resetting role on the movement of the moving plate 701.

[0054] Please refer to Figure 5 and Figure 6 The second pushing mechanism comprises a fixed pin 901 fixedly connected to the bottom of the moving plate 701, and the side wall of the sliding plate 20 is fixedly connected with a connecting rod 902, the other end of the connecting rod 902 is arranged through the side wall of the fixed cover 19, and the top of the connecting rod 902 is fixedly connected with a plurality of triangular blocks 903 arranged in an array, when the sliding plate 20 moves, the triangular blocks 903 can be moved by the connecting rod 902, when the triangular blocks 903 abut against the lower end of the fixed pin 901, the moving plate 701 and the rubber rod 702 can be pushed upward.

[0055] A stainless steel investment casting heat treatment method using the above-mentioned stainless steel investment casting heat treatment equipment, comprising the following steps:

[0056] S1: when casting, place the shell mold on the conveying belt 1001 for conveying, when conveyed to below the preheating cover 12 and the hollow cover 14, drive the preheating cover 12 to move downward by the lifting module 11, at the same time, drive the hollow cover 14 to move downward by the connecting block 13, so that the hollow cover 14 can cover the preheated shell mold and leave a gap between the inner wall of the hollow cover 14 and the shell mold, and the preheating cover 12 can cover the shell mold which has not been preheated;

[0057] S2: then, pour the metal melt into the hopper 27, after the metal melt is poured into the hopper 27, it will enter the casting pipe 26 and be above the partition plate 202, then drive the connecting plate 204 to move by the second moving module 203, and drive the partition plate 202 to move away from the working cover 201, so as to open the casting pipe 26, at this time, the metal melt in the hopper 27 can enter the shell mold through the casting pipe 26, and when the connecting plate 204 moves, it can slide along the bottom of the inclined plate 602 to the bottom of the flat plate 603, so as to push the rack 402 upward by the L-shaped plate 601, at the same time, the first spring 504 is compressed, when the rack 402 moves upward, it can push the gear 401 to rotate counterclockwise, and drive the cover plate 28 to rotate and close by the shaft 302 and the rotating block 303, so as to seal the top of the hopper 27, avoid external air from entering the hollow cover 14, ensure the casting quality, and avoid waste of heat.

[0058] S3: Then, the metal melt enters the shell mold through the pouring pipe 26, at the same time, the sliding plate 20 is driven by the first moving module 21 to move away from the fixed cover 19, the first one-way valve is opened, and the second one-way valve is closed, at this time, the hot gas generated during pouring can enter the hollow cover 14 through the gap and the annular groove 15, at this time, the outer wall of the shell mold can be heated, and the quality of pouring can be improved, then, through the connecting pipe 22, the preheating cover 12 is entered, at this time, the shell mold to be preheated can be preheated, not only can improve the quality of subsequent casting, but also can recycle the waste heat during pouring, more energy saving and environmental protection, the waste gas after preheating can enter the fixed cover 19 through the hose 23 for temporary storage;

[0059] S4: When the sliding plate 20 moves, the triangular block 903 can be driven to move through the connecting rod 902, when the triangular block 903 abuts against the lower end of the fixed pin 901, the moving plate 701 and the rubber rod 702 can be pushed to move upward, at the same time, the second spring 804 is compressed, when the triangular block 903 passes the fixed pin 901, the moving plate 701 and the rubber rod 702 can move downward under the action of the second spring 804 and reset, so as to reciprocate the rubber rod 702 to reciprocatingly knock and vibrate the bottom of the conveying belt 1001, so as to reciprocatingly vibrate the shell mold, and improve the quality of casting;

[0060] S5: After the pouring is completed, the sliding plate 20 is driven by the first moving module 21 to move into the fixed cover 19, at this time, the waste gas temporarily stored in the fixed cover 19 can be extruded, at the same time, the first one-way valve is closed, and the second one-way valve is opened, at this time, the waste gas temporarily stored in the fixed cover 19 can be extruded into the gas storage tank 25 through the gas collecting pipe 24 for collection, to avoid the escape of waste gas, more healthy and environmental protection, and convenient for discharging the gas between the hollow cover 14 and the shell mold, also can improve the quality of casting.

[0061] The standard parts used in the application can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here, and the contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0062] The above describes the present application and its embodiments, which are not limited, and the drawings only show one of the embodiments of the present application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired thereby, without departing from the purpose of the present application, without creative design, similar structure and embodiments of the technical solution are not creative, and should belong to the protection scope of the present application.

Claims

1. A heat treatment device for stainless steel investment casting, comprising a conveyor (10) disposed on top of a base plate (1), wherein the conveyor (10) includes a conveyor belt (1001), characterized in that: The top of the base plate (1) is connected to a preheating cover (12) via a lifting module (11), and a connecting block (13) is fixedly connected to the side wall of the preheating cover (12). A hollow cover (14) is fixedly connected to the side wall of the connecting block (13), and an annular groove (15) is provided on the inner side wall of the hollow cover (14). The top of the base plate (1) is fixedly connected to a first support block (18), and the top of the first support block (18) is fixedly connected to a fixed cover (19). A sliding plate (20) is slidably connected inside the fixed cover (19), and a first moving module (21) is provided between the sliding plate (20) and the base plate (1). A connecting pipe (22) is fixedly connected between the hollow cover (14) and the preheating cover (12), and a flexible hose (23) is fixedly connected between the preheating cover (12) and the fixed cover (19). A first one-way valve is provided inside the flexible hose (23), and a gas storage tank (25) is fixedly connected to the top of the bottom plate (1). A gas collecting pipe (24) is fixedly connected between the gas storage tank (25) and the fixed cover (19), and a second one-way valve is provided inside the gas collecting pipe (24). It also includes a sealing plate (16) inserted into the hollow cover (14), and a connecting frame (17) is fixedly connected between the sealing plate (16) and the bottom plate (1). A casting pipe (26) is fixedly inserted at the top of the sealing plate (16), and a hopper (27) is fixedly connected at the upper end of the casting pipe (26). A cover plate (28) is rotatably connected to the top of the hopper (27) through a rotating mechanism. An opening and closing mechanism is provided on the side wall of the casting pipe (26), and a vibration mechanism for vibrating the shell mold is provided below the conveyor belt (1001). The rotating mechanism includes two symmetrically arranged L-shaped blocks (301) fixedly connected to the side wall of the hopper (27), and a rotating block (303) is rotatably connected to the side wall of the L-shaped block (301) via a rotating shaft (302). The rotating block (303) is fixed to the side wall of the cover plate (28), and the rotation of the rotating shaft (302) is driven by a driving mechanism. The driving mechanism includes a gear (401) fixedly sleeved on the side wall of the rotating shaft (302), and the side wall of the L-shaped block (301) is connected to a rack (402) through a first reset mechanism. The rack (402) meshes with the gear (401), and the movement of the rack (402) is driven by a first push mechanism. The first reset mechanism includes two symmetrically arranged second support blocks (501) fixedly connected to the side wall of the L-shaped block (301), and two symmetrically arranged guide rods (502) fixedly connected to the opposite side walls of the two second support blocks (501). A slider (503) is sleeved on the side wall of each guide rod (502), and the slider (503) is fixed to the side wall of the rack (402). A first spring (504) is sleeved on the side wall of each guide rod (502). The first pushing mechanism includes an L-shaped plate (601) fixedly connected to the side wall of the rack (402), and an inclined plate (602) is fixedly connected to the lower end of the L-shaped plate (601), and a flat plate (603) is fixedly connected to the other end of the inclined plate (602).

2. The heat treatment equipment for stainless steel investment casting according to claim 1, characterized in that: The opening and closing mechanism includes a working cover (201) fixedly inserted into the side wall of the casting pipe (26), and the working cover (201) is connected to the casting pipe (26). A partition (202) is slidably connected inside the working cover (201). A connecting plate (204) is connected to the side wall of the working cover (201) through a second moving module (203), and the connecting plate (204) is fixed to the side wall of the partition (202).

3. The heat treatment equipment for stainless steel investment casting according to claim 2, characterized in that: The vibration mechanism includes a movable plate (701), and a plurality of arrayed rubber rods (702) are fixedly connected to the top of the movable plate (701). The movable plate (701) is connected to the top of the base plate (1) through a second reset mechanism, and the movement of the movable plate (701) is driven by a second push mechanism.

4. The heat treatment equipment for stainless steel investment casting according to claim 3, characterized in that: The second reset mechanism includes a fixed plate (801) fixedly connected to the top of the base plate (1), and a mounting plate (802) fixedly connected to the side wall of the fixed plate (801). Two symmetrically arranged T-shaped guide rods (803) are inserted into the bottom of the mounting plate (802). The upper end of the T-shaped guide rod (803) is fixed to the bottom of the moving plate (701), and a second spring (804) is sleeved on the side wall of each T-shaped guide rod (803).

5. The heat treatment equipment for stainless steel investment casting according to claim 4, characterized in that: The second pushing mechanism includes a fixing pin (901) fixedly connected to the bottom of the moving plate (701), and a connecting rod (902) fixedly connected to the side wall of the sliding plate (20). The other end of the connecting rod (902) passes through the side wall of the fixing cover (19), and a plurality of arrayed triangular blocks (903) are fixedly connected to the top of the connecting rod (902).

6. A heat treatment method for stainless steel investment casting, employing the heat treatment equipment for stainless steel investment casting as described in claim 5, characterized in that: Includes the following steps: S1: During casting, the shell mold is placed on the conveyor belt (1001) for conveying. When it is conveyed to the bottom of the preheating cover (12) and the hollow cover (14), the preheating cover (12) is moved downward by the lifting module (11). At the same time, the hollow cover (14) is moved downward by the connecting block (13), so that the hollow cover (14) can cover the preheated shell mold and there is a gap between the inner wall of the hollow cover (14) and the shell mold. The preheating cover (12) can cover the unpreheated shell mold. S2: Next, the molten metal is poured into the hopper (27). After the molten metal is poured into the hopper (27), it will enter the casting pipe (26) and be above the partition plate (202). Then, the connecting plate (204) is moved by the second moving module (203), and the partition plate (202) is moved away from the working cover (201), thereby opening the casting pipe (26). At this time, the molten metal in the hopper (27) can enter the shell mold through the casting pipe (26), and when the connecting plate (204) moves, it can move along the inclined plate ( The bottom of 602 slides to the bottom of the flat plate (603), so that the rack (402) can be pushed upward by the L-shaped plate (601). At the same time, the first spring (504) is compressed. When the rack (402) moves upward, it can push the gear (401) to rotate counterclockwise. And, through the rotating shaft (302) and the rotating block (303), the cover plate (28) is rotated and closed, thereby sealing the top of the hopper (27), preventing external air from entering the hollow cover (14), ensuring casting quality, and avoiding heat waste. S3: Next, the molten metal enters the shell mold through the casting pipe (26). At the same time, the sliding plate (20) is moved away from the fixed cover (19) by the first moving module (21). The first one-way valve opens and the second one-way valve closes. At this time, the hot gas generated during casting can enter the hollow cover (14) through the gap and the annular groove (15). At this time, the outer wall of the shell mold can be heated, which can improve the casting quality. Then, it enters the preheating cover (12) through the connecting pipe (22). At this time, the shell mold to be preheated can be preheated. This can not only improve the quality of subsequent casting, but also recover and reuse the residual heat during casting, which is more energy-saving and environmentally friendly. The preheated exhaust gas can enter the fixed cover (19) through the hose (23) for temporary storage. S4: When the sliding plate (20) moves, it can drive the triangular block (903) to move through the connecting rod (902). When the triangular block (903) abuts against the lower end of the fixed pin (901), it can push the moving plate (701) and the rubber rod (702) to move upward. At the same time, the second spring (804) is compressed. When the triangular block (903) passes the fixed pin (901), the moving plate (701) and the rubber rod (702) can move downward and reset under the action of the second spring (804). By repeating this process, the rubber rod (702) can reciprocate to strike and vibrate the bottom of the conveyor belt (1001), thereby reciprocating to vibrate the shell mold and improving the casting quality. S5: After casting is completed, the sliding plate (20) is moved into the fixed cover (19) by the first moving module (21). At this time, the waste gas temporarily stored in the fixed cover (19) can be squeezed. At the same time, the first one-way valve is closed and the second one-way valve is opened. At this time, the waste gas temporarily stored in the fixed cover (19) can be squeezed into the gas storage tank (25) through the gas collection pipe (24) for collection, avoiding the escape of waste gas, making it healthier and more environmentally friendly. In addition, it is convenient to discharge the gas between the hollow cover (14) and the shell mold, which can also improve the casting quality.

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