Metal casting lost foam casting apparatus and casting method

Abstract

The application relates to the technical field of cable processing, in particular to a metal casting lost foam casting equipment and a casting method, which comprises a casting bin, the inner wall bottom of the casting bin is fixedly connected with a casting platform, the casting bin comprises a casting bin shell, the front and back sides of the casting bin shell are fixedly connected with tempered sealing glass, the right top of the casting bin shell is fixedly connected with second tempered sealing glass, the right bottom of the casting bin shell is rotationally connected with a sealing door, the rear side of the right top of the casting bin shell is fixedly connected with a vacuum pump connecting frame, the inner sides of the vacuum pump connecting frame are fixedly connected with vacuum pumps, one end of each of the two vacuum pumps is fixedly connected with a vacuum pump pipeline, the casting bin is arranged, the casting process is efficient, environment-friendly and safe, the efficient operation of the vacuum pumps ensures that the inside of the casting bin rapidly reaches the required vacuum state, and the high-quality production of the castings is effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable processing, more specifically, the present application relates to a metal casting lost foam casting equipment and casting method. BACKGROUND

[0002] Metal casting refers to a casting method that melts metal into a pre-made mold cavity, and after cooling and solidification, a metal part or blank with certain shape, size and performance is obtained. Metal casting has wide application in industrial production, such as automobile manufacturing, mechanical manufacturing, aerospace, etc. Through lost foam casting technology, high-quality and high-precision metal castings can be efficiently produced to meet various complex shape and performance requirements.

[0003] According to the patent document: CN112170782B, a kind of lost foam casting method, the lost foam casting equipment suitable for the method includes bottom plate, the first installation plate is fixedly connected on the top of the bottom plate and the left and right sides symmetry, two the first installation plate inboard is commonly provided with sand collecting mechanism;Through the setting of the above structure, the castings can be conveniently taken out without needing to tilt and overturn after casting, it can be guaranteed that the castings will not be damaged, and the quality of the castings can be guaranteed, the metal scraps produced during casting can be separated from the sand during sand collecting, the sand will not be contaminated with metal scraps, the sand will not mix with small particles when falling into the collecting box, the collected sand will be clean sand, it can be reused without consuming a lot of manpower and material resources for cleaning, it can greatly reduce the production cost, and it will not cause waste of sand.

[0004] When casting metal castings by lost foam, the traditional casting method heats and pours the casting liquid into the sand box in an environment that is not in a vacuum state, so impurities and oxygen in the air are easy to react with the casting liquid, affecting the quality of the castings. In addition, during the casting process, the contact between the casting liquid and oxygen in the air may also cause oxidation, which not only changes the chemical composition of the casting liquid, but also may form an oxide layer on its surface, thereby affecting the surface quality and internal performance of the castings. In addition, dust and other small particles in the air may also mix into the casting liquid, becoming inclusions in the castings, reducing the strength and toughness of the castings. In order to overcome these defects. SUMMARY

[0005] In order to overcome the above-mentioned defects of the prior art, the present application provides a metal casting lost foam casting equipment and casting method, and the technical problems to be solved by the present application are: the environment in which the traditional casting method is placed when heating the casting liquid and pouring it into the sandbox for casting is not a vacuum state, so the impurities and oxygen in the air are easy to react with the casting liquid, affecting the quality of the casting, in addition, the contact between the casting liquid and the oxygen in the air during the casting process may also cause oxidation, which not only changes the chemical composition of the casting liquid, but also may form an oxide layer on its surface, thereby affecting the surface quality and internal performance of the casting. In addition, dust and other small particles in the air may also mix into the casting liquid, becoming inclusions in the casting, reducing the strength and toughness of the casting. In order to overcome these defects.

[0006] In order to solve the above technical problems, the technical scheme adopted by the present application is:

[0007] A metal casting lost foam casting equipment, comprising a casting bin, the inner wall bottom of the casting bin is fixedly connected with a casting platform;

[0008] The casting bin comprises a casting bin shell, the front and rear sides of the casting bin shell are fixedly connected with tempered sealing glass, the right side top of the casting bin shell is fixedly connected with a second tempered sealing glass, the right side bottom of the casting bin shell is rotatably connected with a sealing door, the rear side of the right side top of the casting bin shell is fixedly connected with a vacuum pump connecting frame, the inner sides of the vacuum pump connecting frame are fixedly connected with vacuum pumps on both sides, and one end of each of the two vacuum pumps is fixedly connected with a vacuum pump pipeline;

[0009] The casting platform comprises a casting platform body, the bottom of the casting platform body is fixedly connected to the inner wall bottom of the casting bin shell, the left side of the casting platform body is provided with a casting liquid heating tank connecting assembly, and the bottom of the casting liquid heating tank connecting assembly is provided with a control assembly.

[0010] As a further scheme of the present application: two vacuum pump pipelines are fixedly connected with a gas shunt bin at the end away from the vacuum pump, a gas shunt bin gas extraction pipe is fixedly connected to the top front side and the right side bottom of the gas shunt bin, a spray degradation tank is fixedly connected to the top of the casting bin shell and the right side of the gas shunt bin, the end of the gas shunt bin gas extraction pipe away from the gas shunt bin is fixedly connected with a spray degradation tank, and the end of each of the plurality of gas shunt bin gas extraction pipes away from the gas shunt bin extends to the inner wall of the casting bin shell.

[0011] As a further scheme of the present application: the casting platform body comprises a casting frame, a reinforcing assembly is arranged on the right side of the inner side of the casting frame, and a sandbox is arranged on the inner side of the reinforcing assembly.

[0012] As a further scheme of the present application: the casting frame comprises a bottom plate, the bottom of the bottom plate is fixedly connected to the inner wall bottom of the casting bin shell, a sandbox placing groove is formed in the top right middle part of the bottom plate, support vertical rods are fixedly connected to the four sides of the top right side of the bottom plate, horizontal rods are fixedly connected to the inner sides of the top of the front and rear two groups of support vertical rods, top plates are fixedly connected to the top of the left and right two groups of support vertical rods, two columnar guide rods are fixedly connected to the inner sides of the left two support vertical rods, connecting columns are fixedly connected to the front and rear sides of the top of the two top plates, a connecting plate is fixedly connected to the inner sides of the right two connecting columns, and a heating seat connecting plate is fixedly connected to the inner sides of the left two connecting columns.

[0013] As a further scheme of the present application: a heating seat is fixedly connected to the left inner wall of the bottom plate, a heating controller is fixedly connected to the bottom of the heating seat, the bottom of the heating controller is fixedly connected to the top left side of the bottom plate, third support columns are fixedly connected to the front and rear sides of the top left side of the bottom plate, the top of the two third support columns is fixedly connected to the bottom left side of the heating seat connecting plate, horizontal connecting rods are fixedly connected to the front and rear sides of the top of the connecting plate, second support columns are fixedly connected to the bottom left sides of the two horizontal connecting rods, and the bottom of the two second support columns is fixedly connected to the front and rear sides of the top left side of the heating seat connecting plate.

[0014] As a further scheme of the present application: the reinforcing assembly comprises two clamping plates, V-shaped rotating rods are rotatably connected to the left and right sides of the outer sides of the two clamping plates, hinge blocks are rotatably connected to the middle parts of the outer walls of the front and rear two groups of V-shaped rotating rods, the outer sides of the front and rear two groups of hinge blocks are fixedly connected to the left and right sides of the inner sides of the two horizontal rods, contraction and expansion control plates are rotatably connected to the top inner sides of the front and rear two groups of V-shaped rotating rods, the left inner walls of the two clamping plates are rotatably connected to the front and rear sides of the outer walls of the two columnar guide rods, rotating rods are rotatably connected to the right inner sides of the two contraction and expansion control plates, push-pull blocks are rotatably connected to the left sides of the two rotating rods, flow guide pipes are fixedly connected to the inner walls of the push-pull blocks, the bottom ends of the flow guide pipes extend to the outer wall bottoms of the push-pull blocks, the top ends of the flow guide pipes are designed in a funnel shape, contraction and expansion control rods are fixedly connected to the middle parts of the outer sides of the two contraction and expansion control plates, inverted L-shaped contraction and expansion control rods are fixedly connected to the top of the two contraction and expansion control rods, the bottom of the sandbox is slidably connected to the inner wall of the sandbox placing groove formed in the top right side of the bottom plate, and the front and rear sides of the sandbox are aligned with the inner sides of the two clamping plates.

[0015] As a further scheme of the present application: the casting liquid heating tank connecting assembly comprises a sliding groove plate, the right side of the sliding groove plate is fixedly connected to the middle of the top left side of the heating seat connecting plate, a heating tank sliding plate is slidably connected to the top of the sliding groove plate, two side vertical rods are slidably connected to the front and back sides of the heating tank sliding plate, a heating tank is fixedly connected to the middle of the inner wall of the heating tank sliding plate, a liquid outlet nozzle connecting block is fixedly connected to the middle of the top right side of the heating tank sliding plate, a liquid outlet nozzle is fixedly connected to the inner wall of the liquid outlet nozzle connecting block, a liquid passing pipeline is fixedly connected to the top of the liquid outlet nozzle, the end of the liquid passing pipeline away from the liquid outlet nozzle is fixedly connected to the outer wall of the heating tank, liquid outlet pipe positioning plates are fixedly connected to the top inner sides of the front and back groups of side vertical rods, positioning grooves are formed in the middle of the liquid outlet pipe positioning plates, and a sliding groove plate guide groove is formed in the top of the sliding groove plate.

[0016] As a further scheme of the present application: the control assembly comprises an L-shaped connecting plate, the right side of the L-shaped connecting plate is fixedly connected to the left side of the heating seat connecting plate, the front and back sides of the top of the L-shaped connecting plate are fixedly connected to the bottoms of the front and back groups of side vertical rods, support frame plates are fixedly connected to the front and back sides of the bottom of the L-shaped connecting plate, the left sides of the two support frame plates are fixedly connected to the left side of the inner wall of the casting bin shell, side connecting rods are fixedly connected to the front and back sides of the left side of the top of the L-shaped connecting plate, a triangular top plate is fixedly connected to the top inner sides of the two side connecting rods, L-shaped expansion and contraction rod guide rods are fixedly connected to the right sides of the front and back sides of the top of the triangular top plate, gears are rotatably connected to the two sides of the inside of the two L-shaped expansion and contraction rod guide rods on the top of the triangular top plate, bidirectional rack rod guide rods are fixedly connected to the middle of the right side of the top of the triangular top plate, bidirectional rack rods are slidably connected to the inner walls of the two bidirectional rack rod guide rods, the front and back sides of the bidirectional rack rod are engaged with the outer walls of the two gears, L-shaped expansion and contraction rods are slidably connected to the top of the two L-shaped expansion and contraction rod guide rods, racks are fixedly connected to the inner sides of the two L-shaped expansion and contraction rods, and the middle portions of the two L-shaped expansion and contraction rods are slidably connected.

[0017] As a further scheme of the present application: the middle part of the top left side of the L-shaped connecting plate is fixedly connected with a hydraulic push rod, the right end of the hydraulic push rod is fixedly connected with a U-shaped push-pull rod push block, the inner side of the right side of the U-shaped push-pull rod push block is fixedly connected with a U-shaped push-pull rod, the right side of the U-shaped push-pull rod is fixedly connected with a push-pull plate, the top of the push-pull plate is slidingly connected with the bottom of the two-way rack rod guide rod, the left side of the right side of the push-pull plate is fixedly connected with the heating tank sliding plate, the bottom of the two-way rack rod guide rod is fixedly connected with a vertical rod, the bottom of the vertical rod extends to the bottom of the outer wall of the two-way rack rod guide rod and the right side is fixedly connected with a sleeve ring push-pull rod, the right end of the sleeve ring push-pull rod extends to the right side of the push-pull plate and is fixedly connected with a sleeve ring, the inner wall of the sleeve ring is fixedly connected with the outer wall of the heating tank, and the left sides of the inner sides of the two L-shaped expansion and contraction rods are fixedly connected with the left sides of the top outer sides of the two inverted L-shaped expansion and contraction control rods.

[0018] In addition, the present application also relates to a metal casting lost foam casting equipment and a casting method, comprising the following steps:

[0019] Step one: place the metal mold to be cast in the sand box, and ensure that the mold is tightly wrapped with an appropriate amount of molding sand to form a complete mold cavity, then close the door of the casting bin shell to ensure the sealing of the casting process;

[0020] Step two: start the vacuum pump to extract the air in the casting bin shell through the gas shunt bin air extraction pipe to form a negative pressure environment to prepare for the subsequent casting process;

[0021] Step three: deliver the casting liquid to the heating tank through the casting liquid storage tank and the casting liquid outlet pipe, and start the heating controller to heat the heating seat to heat the casting liquid to an appropriate pouring temperature;

[0022] Step four: start the hydraulic push rod to push the heating tank sliding plate and the heating tank to the top of the heating seat to the right, at this time, the casting liquid in the heating tank starts to be heated;

[0023] Step five: while the heating tank is heating the casting liquid, the movement of the heating tank sliding plate drives the L-shaped expansion and contraction rod to slide on the top of the L-shaped expansion and contraction rod guide rod, and through the movement of the expansion and contraction control rod and the expansion and contraction control plate, the clamping plate moves inward and clamps the sand box to stably fix the sand box;

[0024] Step six: when the casting liquid is heated to an appropriate temperature, the liquid outlet nozzle delivers the heated casting liquid to the flow guide pipe through the liquid channel, and the casting liquid flows into the mold cavity in the sand box along the funnel-shaped design part of the flow guide pipe, completing the pouring process of the casting liquid;

[0025] Step seven: during the casting of the casting liquid, the vacuum pump is continuously running, maintaining the negative pressure environment in the casting bin shell, which helps the casting liquid to fill the mold cavity more fully, improves the precision and integrity of the casting;

[0026] Step eight: after the casting is completed, the vacuum pump is turned off, the door of the casting bin shell is opened, the casting is taken out, and the subsequent cleaning and processing work is carried out.

[0027] The beneficial effects of the present application are:

[0028] 1、The present application sets up a casting bin, which is efficient, environmentally friendly and safe in the casting process. The efficient operation of the vacuum pump ensures that the inside of the casting bin quickly reaches the required vacuum state, providing a strong guarantee for the high-quality production of castings. The reasonable design of the gas shunt bin allows the gas to be evenly and efficiently shunted to the spray degradation tank, improving the processing efficiency of harmful gas. The spray device and degradation material inside the spray degradation tank can fully react with harmful gas and convert it into harmless substances, greatly reducing environmental pollution. Therefore, the metal casting lost foam casting equipment and casting method of the present application not only improves the casting efficiency and product quality, but also realizes environmental protection and safety during the casting process, with significant technical advantages and application value.

[0029] 2、The present application sets up a casting bin and a casting platform, which ensures the stability and accuracy of the casting process, and significantly improves the quality and production efficiency of the casting. During the heating process of the casting liquid, the accurate control of the heating controller allows the casting liquid to reach the appropriate pouring temperature uniformly and quickly, ensuring the performance of the casting. At the same time, the stable fixation of the sand box effectively prevents the shaking or displacement during the casting process, further ensuring the precision of the casting. In addition, the creation of a negative pressure environment reduces the pores and inclusions generated during the casting process, improving the overall quality of the casting. The setting of the spray degradation treatment system effectively purifies the harmful gas generated during the casting process, ensuring the safety and hygiene of the working environment. In summary, the present application provides an efficient, stable and environmentally friendly metal casting lost foam casting equipment and casting method, which is of great importance to the development of the casting industry. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a schematic diagram of the main body structure of the present application;

[0031] Figure 2 It is a schematic diagram of the main body structure of the present application;

[0032] Figure 3 It is a schematic diagram of the casting bin structure of the present application;

[0033] Figure 4 It is a schematic diagram of the casting platform structure of the present application;

[0034] Figure 5 The three-dimensional separation structure diagram of the casting platform of the present application;

[0035] Figure 6 The three-dimensional structure diagram of the main body of the casting platform of the present application;

[0036] Figure 7 The three-dimensional structure diagram of the casting frame of the present application;

[0037] Figure 8 The three-dimensional separation structure diagram of the reinforcing assembly and the sandbox of the present application;

[0038] Figure 9 The three-dimensional structure diagram of the connecting assembly of the casting liquid heating tank of the present application;

[0039] Figure 10 The three-dimensional structure diagram of the control assembly of the present application.

[0040] In the figure: 1, casting bin; 11, casting bin shell; 12, tempered sealing glass; 13, second tempered sealing glass; 14, sealing door; 15, vacuum pump connecting frame; 16, vacuum pump pipeline; 17, gas shunt bin; 18, gas shunt bin exhaust pipe; 19, vacuum pump; 110, spray degradation tank; 111, casting liquid storage tank; 112, casting liquid outlet pipe; 2, casting platform; 21, casting platform main body; 211, casting frame; 2111, bottom plate; 2112, sandbox placing groove; 2113, support vertical rod; 2114, top plate; 2115, connecting vertical column; 2116, link plate; 2117, horizontal rod; 2118, horizontal link rod; 2119, columnar guide rod; 21110, heating controller; 21111, heating seat connecting plate; 21112, heating seat; 21113, second support vertical column; 21114, third support vertical column; 212, reinforcing assembly; 2121, clamping plate; 2122, V-shaped rotating rod; 2123, hinged block; 2124, contraction and expansion control plate; 2125, contraction and expansion control rod; 2126, rotating rod; 2127, inverted L-shaped contraction and expansion control rod; 2128, push-pull block; 2129, flow guide pipe; 213, sandbox; 22, casting liquid heating tank connecting assembly; 221, sliding groove plate; 222, heating tank sliding plate; 223, side vertical rod; 224, outlet pipe positioning plate; 225, positioning groove; 226, heating tank; 227, outlet nozzle connecting block; 228, outlet nozzle; 229, liquid passage pipeline; 2210, sliding groove plate guide groove; 23, control assembly; 231, L-shaped connecting plate; 232, support frame plate; 233, side connecting rod; 234, triangular top plate; 235, L-shaped contraction and expansion rod guide rod; 236, L-shaped contraction and expansion rod; 237, rack; 238, bidirectional rack rod guide rod; 239, gear; 2310, bidirectional rack rod; 2311, vertical rod; 2312, sleeve ring push-pull rod; 2313, push-pull plate; 2314, sleeve ring; 2315, U-shaped push-pull rod; 2316, U-shaped push-pull rod push block; 2317, hydraulic push rod. DETAILED DESCRIPTION

[0041] 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 a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0042] As Figures 1-2 shown, the present application provides a metal casting lost foam casting equipment, which comprises a casting bin 1, and a casting platform 2 is fixedly connected to the inner wall bottom of the casting bin 1.

[0043] Through the setting of the casting platform 2, the metal casting can be stably supported, and the stability and precision in the casting process are ensured, and the design of the casting bin 1 effectively accommodates various components required in the casting process, and provides a closed and controllable casting environment.

[0044] As shown in Figure 3 The casting bin 1 includes a casting bin shell 11, the front and rear sides of the casting bin shell 11 are fixedly connected with tempered sealing glass 12, the right side top of the casting bin shell 11 is fixedly connected with a second tempered sealing glass 13, the right side bottom of the casting bin shell 11 is rotatably connected with a sealing door 14, the rear side of the right side top of the casting bin shell 11 is fixedly connected with a vacuum pump connecting frame 15, the inner sides of the vacuum pump connecting frame 15 are fixedly connected with vacuum pumps 19, one end of each of the two vacuum pumps 19 is fixedly connected with a vacuum pump pipeline 16, the ends of the two vacuum pump pipelines 16 away from the vacuum pumps 19 are fixedly connected with a gas shunting bin 17, the top front side and the right bottom side of the gas shunting bin 17 are fixedly connected with gas shunting bin exhaust pipes 18, the top of the casting bin shell 11 is fixedly connected with a spray degradation tank 110 near one side of the gas shunting bin 17, the right gas shunting bin exhaust pipe 18 is fixedly connected with the spray degradation tank 110 away from the gas shunting bin 17, the ends of the plurality of gas shunting bin exhaust pipes 18 away from the gas shunting bin 17 all extend to the inner wall of the casting bin shell 11, the left top of the casting bin shell 11 is fixedly connected with a casting liquid storage tank 111, the right bottom of the casting liquid storage tank 111 is fixedly connected with a casting liquid outlet pipe 112, the end of the casting liquid outlet pipe 112 away from the casting liquid storage tank 111 extends to the inner wall of the casting bin shell 11;

[0045] Through the above structure, the working environment in the casting bin 1 is greatly optimized, the tempered sealing glass 12 and the second tempered sealing glass 13 are provided, so that the working staff can clearly observe the working state in the casting bin 1, and the sealing property of the casting bin 1 is ensured, the harmful gas generated in the casting process is prevented from leaking, and the safety of the working staff is ensured;

[0046] The sealing door 14 is provided, the sealing door 14 is opened by the working staff when needed, the vacuum pumps 19 are connected with the gas shunting bin 17 through the vacuum pump pipeline 16, the air in the inner wall of the casting bin 1 is extracted when casting and heating the casting liquid, and is discharged into the spray degradation tank 110 through the gas shunting bin exhaust pipe 18 for degradation treatment, and the environmental pollution generated in the casting process is effectively reduced;

[0047] The spray degradation tank 110 can spray and degrade the harmful gas, further reduces the emission of harmful gas, reaches the environmental protection requirement, simultaneously, the foundry liquid storage tank 111 sends the foundry liquid into the foundry bin 1 through the foundry liquid outlet pipe 112, guarantees the smooth progress of the foundry process, the whole foundry bin 1 is reasonable in structural design, easy to operate, greatly improves the foundry efficiency and product quality.

[0048] As Figures 4-10As shown, the casting platform 2 comprises a casting platform body 21, the bottom of the casting platform body 21 is fixedly connected to the inner wall bottom of the casting bin shell 11, the left side of the casting platform body 21 is provided with a casting liquid heating tank connecting assembly 22, the bottom of the casting liquid heating tank connecting assembly 22 is provided with a control assembly 23, the casting platform body 21 comprises a casting frame 211, the right side of the inner side of the casting frame 211 is provided with a reinforcing assembly 212, the inner side of the reinforcing assembly 212 is provided with a sandbox 213, the casting frame 211 comprises a bottom plate 2111, the bottom of the bottom plate 2111 is fixedly connected to the inner wall bottom of the casting bin shell 11, the top right side of the bottom plate 2111 is provided with a sandbox placing groove 2112, the top right side of the bottom plate 2111 is fixedly connected with a support vertical rod 2113 on the four sides, the inner side top of the front and rear two groups of support vertical rods 2113 is fixedly connected with a horizontal rod 2117, the top of the left and right two groups of support vertical rods 2113 is fixedly connected with a top plate 2114, the inner side of the left two support vertical rods 2113 is fixedly connected with two columnar guide rods 2119, the front and rear sides of the top of the two top plates 2114 is fixedly connected with a connecting vertical column 2115, the inner side of the right two connecting vertical columns 2115 is fixedly connected with a connecting plate 2116, the inner side of the left two connecting vertical columns 2115 is fixedly connected with a heating seat connecting plate 21111, the left side inner wall of the bottom plate 2111 is fixedly connected with a heating seat 21112, the bottom of the heating seat 21112 is fixedly connected with a heating controller 21110, the bottom of the heating controller 21110 is fixedly connected to the top left side of the bottom plate 2111, the front and rear sides of the top left side of the bottom plate 2111 is fixedly connected with a third support vertical column 21114, the top of the two third support vertical columns 21114 is fixedly connected to the bottom left side of the heating seat connecting plate 21111, the front and rear sides of the top of the connecting plate 2116 is fixedly connected with a horizontal connecting rod 2118, the bottom left side of the two horizontal connecting rods 2118 is fixedly connected with a second support vertical column 21113, the bottom of the two second support vertical columns 21113 is fixedly connected to the front and rear sides of the top left side of the heating seat connecting plate 21111, the reinforcing assembly 212 comprises two clamping plates 2121, the left and right sides of the outer side of the two clamping plates 2121 is rotatably connected with a V-shaped rotating rod 2122, the outer wall middle of the front and rear two groups of V-shaped rotating rods 2122 is rotatably connected with a hinge block 2123, the outer side of the front and rear two groups of hinge blocks 2123 is fixedly connected to the left and right sides of the inner side of the two horizontal rods 2117, the inner side top of the front and rear two groups of V-shaped rotating rods 2122 is rotatably connected with a contraction and expansion control plate 2124, the two sides of the left side inner wall of the two clamping plates 2121 is rotatably connected to the front and rear sides of the outer wall of the two columnar guide rods 2119, the right side of the inner side of the two contraction and expansion control plates 2124 is rotatably connected with a rotating rod 2126, the left side of the two rotating rods 2126 is rotatably connected with a push-pull block 2128, the inner wall of the push-pull block 2128 is fixedly connected with a flow guide pipe 2129, the bottom end of the flow guide pipe 2129 extends to the outer wall bottom of the push-pull block 2128,The top end of the flow guide pipe 2129 is funnel-shaped, the outer middle part of each of the two convergence and divergence control plates 2124 is fixedly connected with a convergence and divergence control rod 2125, the top of each of the two convergence and divergence control rods 2125 is fixedly connected with an inverted L-shaped convergence and divergence control rod 2127, the bottom of the sandbox 213 is slidingly connected to the inner wall of the sandbox placing groove 2112 arranged on the top right side of the bottom plate 2111, the front and back sides of the sandbox 213 are aligned with the inner sides of the two clamping plates 2121, the cast liquid heating tank connecting assembly 22 comprises a sliding groove plate 221, the right side of the sliding groove plate 221 is fixedly connected to the top left side of the middle part of the heating seat connecting plate 21111, the top of the sliding groove plate 221 is slidingly connected with a heating tank sliding plate 222, the front and back sides of the heating tank sliding plate 222 are slidingly connected with two side vertical rods 223, the inner wall of the middle part of the heating tank sliding plate 222 is fixedly connected with a heating tank 226, the middle part of the top right side of the heating tank sliding plate 222 is fixedly connected with a liquid outlet nozzle connecting block 227, the inner wall of the liquid outlet nozzle connecting block 227 is fixedly connected with a liquid outlet nozzle 228, the top of the liquid outlet nozzle 228 is fixedly connected with a liquid passage 229, one end of the liquid passage 229 away from the liquid outlet nozzle 228 is fixedly connected to the outer wall of the heating tank 226, the inner sides of the front and back two groups of side vertical rods 223 are fixedly connected with a liquid outlet pipe positioning plate 224, the middle part of the liquid outlet pipe positioning plate 224 is provided with a positioning groove 225, the top of the sliding groove plate 221 is provided with a sliding groove plate guide groove 2210, the control assembly 23 comprises an L-shaped connecting plate 231, the right side of the L-shaped connecting plate 231 is fixedly connected to the left side of the heating seat connecting plate 21111, the front and back sides of the top of the L-shaped connecting plate 231 are fixedly connected to the bottom of the front and back two groups of side vertical rods 223, the front and back sides of the bottom of the L-shaped connecting plate 231 are fixedly connected with support frame plates 232, the left sides of the two support frame plates 232 are fixedly connected to the left side of the inner wall of the casting bin shell 11, the front and back sides of the top left side of the L-shaped connecting plate 231 are fixedly connected with side connecting rods 233, the inner sides of the top of the two side connecting rods 233 are fixedly connected with a triangular top plate 234, the right sides of the top front and back sides of the triangular top plate 234 are fixedly connected with L-shaped convergence and divergence rod guide rods 235, the top of the triangular top plate 234 is rotatably connected with a gear 239 on the inner sides of the two L-shaped convergence and divergence rod guide rods 235, the middle part of the top right side of the triangular top plate 234 is fixedly connected with a bidirectional rack rod guide rod 238, the inner wall of the two bidirectional rack rod guide rods 238 is slidingly connected with a bidirectional rack rod 2310, the front and back sides of the bidirectional rack rod 2310 are engaged with the outer walls of the two gears 239, the top of each of the two L-shaped convergence and divergence rod guide rods 235 is slidingly connected with an L-shaped convergence and divergence rod 236, the inner sides of the two L-shaped convergence and divergence rods 236 are fixedly connected with a rack 237, the middle parts of the two L-shaped convergence and divergence rods 236 are abutted and slidingly connected, the two racks 237 fixedly connected to the inner sides of the two L-shaped convergence and divergence rods 236 are engaged with the outer walls of the two gears 239, the middle part of the top left side of the L-shaped connecting plate 231 is fixedly connected with a hydraulic push rod 2317,The right end of the hydraulic push rod 2317 is fixedly connected with a U-shaped push-pull rod push block 2316, the inner side of the right side of the U-shaped push-pull rod push block 2316 is fixedly connected with a U-shaped push-pull rod 2315, the right side of the U-shaped push-pull rod 2315 is fixedly connected with a push-pull plate 2313, the top of the push-pull plate 2313 is slidably connected with the bottom of the double rack bar guide rod 238, the left side of the push-pull plate 2313 is fixedly connected with the heating tank sliding plate 222, the bottom of the vertical rod 2311 is fixedly connected with the double rack bar guide rod 238, the bottom of the vertical rod 2311 extends to the outer wall bottom of the double rack bar guide rod 238 and is fixedly connected with a sleeve ring push-pull rod 2312 on the right side, the right end of the sleeve ring push-pull rod 2312 extends to the right side of the push-pull plate 2313 and is fixedly connected with a sleeve ring 2314, the inner wall of the sleeve ring 2314 is fixedly connected with the outer wall of the heating tank 226, and the inner sides of the two L-shaped expansion rods 236 are fixedly connected with the outer sides of the top of the two inverted L-shaped expansion control rods 2127.

[0049] When it is necessary to heat the casting liquid, the casting liquid is sent to the inner wall of the heating tank 226 through the casting liquid storage tank 111 and the casting liquid outlet pipe 112, when the inner wall of the heating tank 226 stores a certain amount of casting liquid, the casting liquid outlet pipe 112 stops conveying, and the hydraulic push rod 2317 drives the U-shaped push-pull rod push block 2316 to move to the right, the U-shaped push-pull rod push block 2316 moves to the right and drives the U-shaped push-pull rod 2315, the push-pull plate 2313, the sleeve ring push-pull rod 2312 and the double rack bar 2310 to move to the right at the same time, and the sleeve ring 2314 sleeved on the outer wall of the heating tank 226 and the push-pull plate 2313 fixedly connected with the left side of the heating tank sliding plate 222 move the heating tank sliding plate 222 as a whole to the right, at this time, the bottom of the heating tank 226 is on the top of the heating seat 21112, and the heating seat 21112 starts to heat the casting liquid in the heating tank 226, and the heating controller 21110 accurately controls the heating process to ensure that the casting liquid reaches the appropriate pouring temperature, when the hydraulic push rod 2317 drives the heating tank sliding plate 222 to move the heating tank 226 to the right to heat the casting liquid in the inner wall of the heating tank 226, and the heating tank sliding plate 222 moves to the right, the vertical rod 2311 moves to the right and drives the double rack bar 2310 to slide to the right on the inner wall of the double rack bar guide rod 238, the double rack bar 2310 slides to the right, and at the same time, drives the two gears 239 meshed with it to rotate, the rotation of the two gears 239 drives the two racks 237 meshed with them to move, the two racks 237 are fixedly connected with the inner sides of the two L-shaped expansion rods 236 respectively, therefore, with the rotation of the gear 239, the L-shaped expansion rod 236 slides on the top of the L-shaped expansion rod guide rod 235, and the middle parts of the two L-shaped expansion rods 236 move close to or away from each other, realizing the expansion and contraction action.

[0050] Meanwhile, since the left sides of the inner sides of the two L-shaped telescopic rods 236 are fixedly connected to the left sides of the outer sides of the top portions of the two inverted L-shaped telescopic control rods 2127 respectively, the movement of the L-shaped telescopic rods 236 drives the movement of the inverted L-shaped telescopic control rods 2127, and the movement of the inverted L-shaped telescopic control rods 2127 further drives the movement of the telescopic control rods 2125 and the telescopic control plate 2124. The outward movement of the telescopic control plate 2124 further drives the movement of the V-shaped rotating rods 2122, so that the two clamping plates 2121 move inward and clamp the outer wall of the sand box 213, thereby fixing the sand box 213 and preventing the sand box 213 from shaking or moving during the casting process, ensuring the stability and accuracy of the casting process. At the same time, the outward movement of the telescopic control plate 2124 also drives the movement of the rotating rod 2126 and the push-pull block 2128, so that the funnel-shaped design part of the flow guide pipe 2129 can accurately align with the pouring opening of the sand box 213, facilitating the smooth flow of the casting liquid into the sand box 213 through the flow guide pipe 2129. At this time, the top of the flow guide pipe 2129 is aligned with the bottom of the liquid outlet nozzle 228, and the liquid outlet nozzle 228 can deliver the heated casting liquid into the flow guide pipe 2129 through the liquid delivery pipeline 229, and then the casting liquid flows into the sand box 213 along the flow guide pipe 2129, completing the casting process. During this process, the funnel-shaped design of the flow guide pipe 2129 can ensure the smooth flow of the casting liquid. During the heating process of the casting liquid in the heating tank 226, the heating controller 21110 can adjust the heating power of the heating seat 21112 in real time according to the preset temperature parameters, so as to ensure that the casting liquid can uniformly and quickly reach the appropriate pouring temperature. At the same time of heating the casting liquid and pouring the heated casting liquid into the sand box 213, the two vacuum pumps 19 are always started to extract the air in the casting chamber 11 through the gas extraction pipe 18, forming a negative pressure environment, which helps to reduce the pores and inclusions generated during the casting process, improves the quality of the casting, and at the same time, the negative pressure environment also helps the casting liquid to more fully fill the mold cavity in the sand box 213, further ensuring the precision and integrity of the casting. The gas extraction pipe 18 also extracts the gas generated during casting and sprays it through the spray degradation tank 110 for spray degradation treatment. The spray degradation tank 110 is provided with a spraying device and a degradation agent inside. The spraying device uniformly sprays the degradation agent into the gas, and the degradation agent reacts with the harmful substances in the gas to convert them into harmless substances, thereby achieving the purpose of purifying the gas. The gas treated by the spray degradation treatment is discharged to the outside through the exhaust pipeline, ensuring the safety and hygiene of the working environment. In summary, through reasonable structural design, accurate heating of the casting liquid, stable fixation of the sand box, smooth pouring of the casting liquid and optimization of the casting environment are realized, greatly improving the quality and production efficiency of the casting.

[0051] In addition, the present application also relates to a metal casting lost foam casting equipment and a casting method, comprising the following steps:

[0052] Step one: Place the metal mold to be cast in the sand box 213, and make sure the mold is tightly wrapped with an appropriate amount of sand to form a complete mold cavity. Then, close the door of the casting chamber shell 11 to ensure the sealing of the casting process;

[0053] Step two: Start the vacuum pump 19 to extract the air in the casting chamber shell 11 through the gas shunting chamber extraction pipe 18 to form a negative pressure environment for the subsequent casting process;

[0054] Step three: Deliver the casting liquid to the heating tank 226 through the casting liquid storage tank 111 and the casting liquid outlet pipe 112. The heating controller 21110 starts to heat the heating seat 21112 to heat the casting liquid to an appropriate pouring temperature;

[0055] Step four: The hydraulic push rod 2317 is activated to push the heating tank sliding plate 222 and the heating tank 226 to the top of the heating seat 21112 to the right side. At this time, the casting liquid in the heating tank 226 starts to be heated;

[0056] Step five: While the casting liquid in the heating tank 226 is being heated, the movement of the heating tank sliding plate 222 drives the L-shaped expansion rod 236 to slide on the top of the L-shaped expansion rod guide rod 235, and through the movement of the expansion control rod 2125 and the expansion control plate 2124, the clamping plate 2121 moves inward and clamps the sand box 213 to stabilize and fix the sand box 213;

[0057] Step six: When the casting liquid is heated to an appropriate temperature, the liquid outlet nozzle 228 delivers the heated casting liquid to the flow guide pipe 2129 through the liquid channel 229. The casting liquid flows into the mold cavity in the sand box 213 along the funnel-shaped design part of the flow guide pipe 2129, completing the pouring process of the casting liquid;

[0058] Step seven: During the pouring of the casting liquid, the vacuum pump 19 continues to run to maintain the negative pressure environment in the casting chamber shell 11, which helps the casting liquid to fill the mold cavity more fully, improving the precision and integrity of the casting;

[0059] Step eight: After the casting is completed, turn off the vacuum pump 19, open the door of the casting chamber shell 11, take out the casting, and perform subsequent cleaning and processing work.

[0060] The working principle of the present application is as follows: when the casting liquid needs to be heated, the casting liquid is sent to the inner wall of the heating tank 226 through the casting liquid storage tank 111 and the casting liquid outlet pipe 112, when the inner wall of the heating tank 226 stores a certain amount of casting liquid, the casting liquid outlet pipe 112 stops conveying, and the hydraulic push rod 2317 starts to push the U-shaped push-pull rod push block 2316 to move to the right, the U-shaped push-pull rod push block 2316 moves to the right, thereby driving the U-shaped push-pull rod 2315, the push-pull plate 2313, the sleeve ring push-pull rod 2312 and the bidirectional rack bar 2310 to move to the right together, and the sleeve ring 2314 sleeved on the outer wall of the heating tank 226 and the push-pull plate 2313 fixed on the left side of the heating tank sliding plate 222 move the heating tank sliding plate 222 as a whole to the right, at this time, the bottom of the heating tank 226 is on the top of the heating seat 21112, the heating seat 21112 starts to heat the casting liquid in the heating tank 226, the heating controller 21110 accurately controls the heating process to ensure that the casting liquid reaches the appropriate pouring temperature, while the hydraulic push rod 2317 pushes the heating tank sliding plate 222 to drive the heating tank 226 to move to the right to heat the casting liquid on the inner wall of the heating tank 226, when the heating tank sliding plate 222 moves to the right, the vertical rod 2311 moves to the right, which drives the bidirectional rack bar 2310 to slide to the right on the inner wall of the bidirectional rack bar guide rod 238, while the bidirectional rack bar 2310 slides to the right, it drives the two gears 239 meshing with it to rotate, the rotation of the two gears 239 drives the two racks 237 meshing with them to move, the two racks 237 are respectively fixedly connected to the inner sides of the two L-shaped expansion and contraction rods 236, therefore, with the rotation of the gear 239, the L-shaped expansion and contraction rod 236 slides on the top of the L-shaped expansion and contraction rod guide rod 235, and the middle parts of the two L-shaped expansion and contraction rods 236 approach or move away from each other, realizing the expansion and contraction action, at the same time, since the left sides of the inner sides of the two L-shaped expansion and contraction rods 236 are respectively fixedly connected to the left sides of the outer sides of the top of the two inverted L-shaped expansion and contraction control rods 2127, the movement of the L-shaped expansion and contraction rod 236 drives the inverted L-shaped expansion and contraction control rod 2127 to move, the movement of the inverted L-shaped expansion and contraction control rod 2127 further drives the expansion and contraction control rod 2125 and the expansion and contraction control plate 2124 to move.The expansion control plate 2124 moves outward, and then rotates through the two groups of V-shaped rotating rods 2122 to make the two clamping plates 2121 move inward and clamp the outer wall of the sand box 213, fixing the sand box 213, preventing the sand box 213 from shaking or moving during casting, and ensuring the stability and accuracy of the casting process. At the same time, the outward movement of the expansion control plate 2124 also drives the rotating rod 2126 and the push-pull block 2128 to move, so that the funnel-shaped design part of the flow guide pipe 2129 can accurately align with the pouring opening of the sand box 213, facilitating the smooth flow of the casting liquid into the sand box 213 through the flow guide pipe 2129, and at this time, the top of the flow guide pipe 2129 is aligned with the bottom of the liquid outlet nozzle 228. The liquid outlet nozzle 228 can deliver the heated casting liquid into the flow guide pipe 2129 through the liquid delivery pipeline 229, and then the casting liquid flows into the sand box 213 along the flow guide pipe 2129, completing the casting process of the casting liquid. During this process, the funnel-shaped design of the flow guide pipe 2129 can ensure that the casting liquid can flow smoothly. During the heating process of the casting liquid in the heating tank 226, the heating controller 21110 will adjust the heating power of the heating seat 21112 in real time according to the preset temperature parameters, to ensure that the casting liquid can uniformly and quickly reach the appropriate pouring temperature. At the same time of heating the casting liquid and casting the heated casting liquid delivered to the inner wall of the sand box 213, the two vacuum pumps 19 are always started to extract the air in the casting chamber shell 11 through the gas shunting warehouse air extraction pipe 18 to form a negative pressure environment, which helps to reduce air holes and inclusions generated during casting, and improves the quality of the casting. At the same time, the negative pressure environment also helps the casting liquid to more fully fill the mold cavity in the sand box 213, further ensuring the precision and integrity of the casting. The gas shunting warehouse air extraction pipe 18 also extracts the gas generated during casting and sprays it through the spray degradation tank 110 for spray degradation treatment. The spray degradation tank 110 is internally provided with a spraying device and a degradation agent. The spraying device uniformly sprays the degradation agent in the gas, and the degradation agent reacts with harmful substances in the gas to convert them into harmless substances, thereby achieving the purpose of purifying the gas. The gas treated by spray degradation is discharged to the outside through the exhaust pipeline.

[0061] The basic principles and main features of the present application and the advantages of the present application have been shown and described. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A metal casting lost foam casting apparatus, characterized by: Including foundry bin (1), the inner wall bottom of foundry bin (1) is fixedly connected with foundry platform (2); The foundry bin (1) includes foundry bin shell (11), the front and rear sides of foundry bin shell (11) are fixedly connected with toughened sealing glass (12), the right side top of foundry bin shell (11) is fixedly connected with second toughened sealing glass (13), the right side bottom of foundry bin shell (11) is rotatably connected with sealing door (14), the top right side rear of foundry bin shell (11) is fixedly connected with vacuum pump connecting frame (15), the inner sides of vacuum pump connecting frame (15) are fixedly connected with vacuum pump (19), one end of two vacuum pump (19) is fixedly connected with vacuum pump pipeline (16); The casting platform (2) includes a casting platform body (21), the bottom of the casting platform body (21) is fixedly connected to the inner wall bottom of the foundry bin shell (11), the left side of the casting platform body (21) is provided with a casting liquid heating tank connecting assembly (22), the bottom of the casting liquid heating tank connecting assembly (22) is provided with a control assembly (23); The control assembly (23) comprises an L-shaped connecting plate (231), the right side of the L-shaped connecting plate (231) is fixedly connected to the left side of the heating seat connecting plate (21111), the front and back sides of the top of the L-shaped connecting plate (231) are fixedly connected to the bottom of the front and back two groups of side vertical rods (223), the front and back sides of the bottom of the L-shaped connecting plate (231) are fixedly connected with support frame plates (232), the left sides of the two support frame plates (232) are fixedly connected to the left side of the inner wall of the casting bin shell (11), the front and back sides of the left side of the top of the L-shaped connecting plate (231) are fixedly connected with side connecting rods (233), the inner side top of the two side connecting rods (233) is fixedly connected with a triangular top plate (234), the right sides of the top front and back sides of the triangular top plate (234) are fixedly connected with L-shaped expansion and contraction rod guide rods (235), the top of the triangular top plate (234) is rotatably connected with gear wheels (239) on the two sides of the inner sides of the two L-shaped expansion and contraction rod guide rods (235), the middle of the top right side of the triangular top plate (234) is fixedly connected with bidirectional rack bar guide rods (238), the inner walls of the two bidirectional rack bar guide rods (238) are slidably connected with bidirectional rack bars (2310), the front and back sides of the bidirectional rack bar (2310) are meshed with the outer walls of the two gear wheels (239), the tops of the two L-shaped expansion and contraction rod guide rods (235) are slidably connected with L-shaped expansion and contraction rods (236), the inner sides of the two L-shaped expansion and contraction rods (236) are fixedly connected with racks (237), the middle portions of the two L-shaped expansion and contraction rods (236) are abutted and slidably connected, the two racks (237) fixedly connected to the inner sides of the two L-shaped expansion and contraction rods (236) are meshed with the outer walls of the two gear wheels (239), the middle portion of the left side of the top of the L-shaped connecting plate (231) is fixedly connected with a hydraulic push rod (2317), the right end of the hydraulic push rod (2317) is fixedly connected with a U-shaped push-pull rod push block (2316), the inner side of the right side of the U-shaped push-pull rod push block (2316) is fixedly connected with a U-shaped push-pull rod (2315), the right side of the U-shaped push-pull rod (2315) is fixedly connected with a push-pull plate (2313), the top of the push-pull plate (2313) is slidably connected to the bottom of the bidirectional rack bar guide rod (238), the right side of the push-pull plate (2313) is fixedly connected to the left side of the heating tank sliding plate (222), the bottom of the bidirectional rack bar guide rod (238) is fixedly connected with a vertical rod (2311), the bottom of the vertical rod (2311) extends to the outer wall bottom of the bidirectional rack bar guide rod (238) and is fixedly connected with a sleeve ring push-pull rod (2312) on the right side, the right end of the sleeve ring push-pull rod (2312) extends to the right side of the push-pull plate (2313) and is fixedly connected with a sleeve ring (2314), the inner wall of the sleeve ring (2314) is fixedly connected to the outer wall of the heating tank (226), the left sides of the inner sides of the two L-shaped expansion and contraction rods (236) are fixedly connected to the left sides of the top outer sides of the two inverted L-shaped expansion and contraction control rods (2127).

2. A metal casting lost form casting apparatus according to claim 1, characterized in that: Two vacuum pump pipeline (16) is fixedly connected with gas shunt bin (17) away from vacuum pump (19), the top front side and the right bottom of gas shunt bin (17) are fixedly connected with gas shunt bin air exhaust pipe (18), the top of foundry bin shell (11) is fixedly connected with spray degradation tank (110) near gas shunt bin (17), the right side of gas shunt bin air exhaust pipe (18) is fixedly connected with spray degradation tank (110) away from gas shunt bin (17), the top of multiple gas shunt bin air exhaust pipe (18) is extended to the inner wall of foundry bin shell (11) away from gas shunt bin (17), the top left side of foundry bin shell (11) is fixedly connected with casting liquid storage tank (111), the right bottom of casting liquid storage tank (111) is fixedly connected with casting liquid outlet pipe (112), the end of casting liquid outlet pipe (112) is extended to the inner wall of foundry bin shell (11) away from casting liquid storage tank (111).

3. A metal casting lost form casting apparatus according to claim 2, characterized in that: The casting platform body (21) includes a casting frame (211), the right side of the inner side of the casting frame (211) is provided with a reinforcing assembly (212), the inner side of the reinforcing assembly (212) is provided with a sandbox (213).

4. A metal casting lost form casting apparatus according to claim 3, characterized in that: The casting frame (211) comprises a bottom plate (2111), the bottom of the bottom plate (2111) is fixedly connected to the inner wall bottom of the casting bin shell (11), a sand box placing groove (2112) is arranged in the top right middle part of the bottom plate (2111), four support vertical rods (2113) are fixedly connected to the top right side of the bottom plate (2111), a horizontal rod (2117) is fixedly connected to the inner top of the front and rear two groups of support vertical rods (2113), a top plate (2114) is fixedly connected to the top of the left and right two groups of support vertical rods (2113), two columnar guide rods (2119) are fixedly connected to the inner side of the left two support vertical rods (2113), a connecting vertical column (2115) is fixedly connected to the top of the two top plates (2114), a connecting plate (2116) is fixedly connected to the inner side of the right two connecting vertical columns (2115), and a heating seat connecting plate (21111) is fixedly connected to the inner side of the left two connecting vertical columns (2115).

5. A metal casting lost form casting apparatus as defined in claim 4 wherein: A heating seat (21112) is fixedly connected to the left inner wall of the bottom plate (2111), a heating controller (21110) is fixedly connected to the bottom of the heating seat (21112), the bottom of the heating controller (21110) is fixedly connected to the top left side of the bottom plate (2111), third support vertical columns (21114) are fixedly connected to the front and rear sides of the top left side of the bottom plate (2111), the top of the two third support vertical columns (21114) is fixedly connected to the bottom left side of the heating seat connecting plate (21111), transverse connecting rods (2118) are fixedly connected to the front and rear sides of the top of the connecting plate (2116), second support vertical columns (21113) are fixedly connected to the bottom left sides of the two transverse connecting rods (2118), and the bottom of the two second support vertical columns (21113) is fixedly connected to the front and rear sides of the top left side of the heating seat connecting plate (21111).

6. A metal casting lost form casting apparatus according to claim 5, wherein: The reinforcing assembly (212) comprises two clamping plates (2121), V-shaped rotating rods (2122) are rotationally connected to the left and right sides outside the two clamping plates (2121), hinge blocks (2123) are rotationally connected to the middle of the outer walls of the front and rear two groups of V-shaped rotating rods (2122), the outer sides of the front and rear two groups of hinge blocks (2123) are fixedly connected to the left and right sides of the inner sides of two cross rods (2117), the inner side top portions of the front and rear two groups of V-shaped rotating rods (2122) are rotationally connected with expansion control plates (2124), the left side inner walls of the two clamping plates (2121) are rotationally connected to the front and rear sides of the outer walls of two cylindrical guide rods (2119), the right sides of the inner sides of two expansion control plates (2124) are rotationally connected with rotating rods (2126), the left sides of two rotating rods (2126) are rotationally connected with push-pull blocks (2128), the inner wall of the push-pull block (2128) is fixedly connected with a flow guide pipe (2129), the bottom end of the flow guide pipe (2129) extends to the bottom of the outer wall of the push-pull block (2128), the top end of the flow guide pipe (2129) is designed in a funnel shape, the middle portions of the outer sides of the two expansion control plates (2124) are fixedly connected with expansion control rods (2125), the top portions of the two expansion control rods (2125) are fixedly connected with inverted L-shaped expansion control rods (2127), the bottom of the sandbox (213) is slidably connected to the inner wall of the sandbox placing groove (2112) formed in the top right side of the bottom plate (2111), and the front and rear sides of the sandbox (213) are aligned with the inner sides of the two clamping plates (2121).

7. A metal casting lost form casting apparatus according to claim 6, characterized in that: The casting liquid heating tank connecting assembly (22) comprises a sliding groove plate (221), the right side of the sliding groove plate (221) is fixedly connected to the middle of the top left side of the heating seat connecting plate (21111), the top of the sliding groove plate (221) is slidably connected with a heating tank sliding plate (222), the front and rear sides of the heating tank sliding plate (222) are slidably connected with two side stand rods (223), the middle of the inner wall of the heating tank sliding plate (222) is fixedly connected with a heating tank (226), the middle of the top right side of the heating tank sliding plate (222) is fixedly connected with a liquid outlet nozzle connecting block (227), the inner wall of the liquid outlet nozzle connecting block (227) is fixedly connected with a liquid outlet nozzle (228), the top of the liquid outlet nozzle (228) is fixedly connected with a liquid passage pipe (229), one end of the liquid passage pipe (229) away from the liquid outlet nozzle (228) is fixedly connected to the outer wall of the heating tank (226), the inner side top portions of the front and rear two groups of side stand rods (223) are fixedly connected with liquid outlet pipe positioning plates (224), the middle of the liquid outlet pipe positioning plate (224) is provided with a positioning groove (225), and the top of the sliding groove plate (221) is provided with a sliding groove plate guide groove (2210).

8. A casting method of a metal casting lost foam casting device according to claim 7, characterized in that: Step one: Place the metal mold to be cast in the sand box (213), and make sure the mold is tightly wrapped with an appropriate amount of sand to form a complete mold cavity. Then, close the door of the casting chamber shell (11) to ensure the sealing of the casting process; Step two: Start the vacuum pump (19) to extract air from the casting chamber shell (11) through the gas shunt chamber air extraction pipe (18), forming a negative pressure environment to prepare for the subsequent casting process; Step three: Deliver the casting liquid to the heating tank (226) through the casting liquid storage tank (111) and the casting liquid outlet pipe (112). The heating controller (21110) starts to heat the heating seat (21112) to heat the casting liquid to the appropriate pouring temperature; Step four: The hydraulic push rod (2317) is activated to push the heating tank sliding plate (222) and the heating tank (226) to the top of the heating seat (21112) to the right. At this time, the casting liquid in the heating tank (226) starts to be heated; Step five: While the heating tank (226) is heating the casting liquid, the movement of the heating tank sliding plate (222) drives the L-shaped expansion and contraction rod (236) to slide on the top of the L-shaped expansion and contraction rod guide rod (235), and through the movement of the expansion and contraction control rod (2125) and the expansion and contraction control plate (2124), the clamping plate (2121) moves inward and clamps the sand box (213), stabilizing and fixing the sand box (213); Step six: When the casting liquid is heated to the appropriate temperature, the liquid outlet nozzle (228) delivers the heated casting liquid to the flow guide pipe (2129) through the liquid delivery pipeline (229). The casting liquid flows into the mold cavity in the sand box (213) along the funnel-shaped design part of the flow guide pipe (2129), completing the casting process of the casting liquid; Step seven: During the casting of the casting liquid, the vacuum pump (19) continues to run to maintain the negative pressure environment in the casting chamber shell (11), which helps the casting liquid to fill the mold cavity more fully, improving the precision and integrity of the casting; Step eight: After the casting is completed, turn off the vacuum pump (19), open the door of the casting chamber shell (11), take out the casting, and perform subsequent cleaning and processing work.

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