Lost foam casting sand box device

Abstract

The utility model relates to the field of evanescent mode casting, in particular to an evanescent mode casting sand box device, which comprises a barrel, a bottom plate, an upper ventilation frame, a lower ventilation frame, a non-porous negative pressure pipe and a porous negative pressure pipe, negative pressure pipes with holes are connected between four rectangular edges of the upper ventilation frame and the lower ventilation frame, a negative pressure pipe with holes is fixedly connected between two parallel side pipes of the lower ventilation frame, a non-porous negative pressure pipe is fixedly connected between the upper ventilation frame and the lower ventilation frame, a connecting pipe is arranged on the non-porous negative pressure pipe, an inner negative pressure pipe is inserted into the connecting pipe, and the inner negative pressure pipe is fixedly connected with the lower ventilation frame. According to the utility model, quartz sand or ceramsite in the sand box is fixed by utilizing the porous negative pressure pipe, the non-porous negative pressure pipe and the inner negative pressure pipe, so that the problem of box collapse caused by insufficient negative pressure of an inner cavity when box or shell castings are produced by using a lost foam casting process is solved, the manufacturing is simple, the operation is convenient, the casting quality is ensured, the rejection rate is reduced, and the production cost is reduced. The construction period is guaranteed, and economic benefits are improved.

Description

Technical Field

[0001] The utility model relates to the field of lost foam casting, in particular to a lost foam casting sand box device. Background Art

[0002] Lost foam casting is a new casting method that uses a single paraffin or foam model or a combination of models that are similar in size and shape to the casting, brushed with refractory paint and dried. The model or model cluster after brushing with refractory paint and drying is generally called a yellow mold. The yellow mold is buried in quartz sand or gem sand and vibrated to shape. Pouring is carried out under negative pressure to vaporize the model, and liquid metal occupies the position of the model. After solidification and cooling, the casting is formed.

[0003] When using the lost foam casting method to produce some shell castings, due to the complex cavity structure of the casting, insufficient negative pressure in the cavity during the pouring process causes the box to collapse, which not only delays the construction period, but in serious cases will lead to the problem of scrapping the casting and being unable to be delivered. Utility Model Content

[0004] The utility model aims to provide a lost foam casting sand box device to solve the problem of insufficient negative pressure in the inner cavity of box or shell castings produced by the lost foam casting process.

[0005] In order to solve the above technical problems, the utility model discloses a lost foam casting sand box device, including a sand box, the sand box includes a cylinder, a bottom plate, an upper ventilation frame, a lower ventilation frame, a negative pressure pipe without holes and a negative pressure pipe with holes, the sand box is a cube, and the cylinder is a square cylinder with a rectangular cross-section; the bottom plate is fixedly connected to the bottom surface of the cylinder, the upper ventilation frame and the lower ventilation frame are both rectangular frames composed of four side tubes, the upper ventilation frame and the lower ventilation frame are both fixedly connected to the inside of the cylinder, the upper ventilation frame is fixedly connected to the upper end of the inner wall of the cylinder, the lower ventilation frame is fixedly connected to the lower end of the inner wall of the cylinder, the lower ventilation frame is fixedly connected to the top surface of the bottom plate, the negative pressure pipe with holes is fixedly connected between the upper ventilation frame and the lower ventilation frame, the upper ventilation frame and the lower ventilation frame are fixedly connected The four rectangular sides of the air frame are connected with perforated negative pressure tubes, which are connected with the upper ventilation frame and the lower ventilation frame. A perforated negative pressure tube is fixedly connected between the two parallel side tubes of the lower ventilation frame. A plurality of through holes I are provided on the perforated negative pressure tube. A non-porous negative pressure tube is fixedly connected between the upper ventilation frame and the lower ventilation frame. The non-porous negative pressure tube is connected with the upper ventilation frame and the lower ventilation frame. A connecting tube is provided on the non-porous negative pressure tube. An internal negative pressure tube is inserted in the connecting tube. The internal negative pressure tube is connected with the non-porous negative pressure tube. A through hole II is provided on the side wall of the internal negative pressure tube away from one end of the connecting tube. A main negative pressure connecting tube is fixedly connected to the outer wall of the lower ventilation frame. The main negative pressure connecting tube is connected with the lower ventilation frame, and the main negative pressure connecting tube passes through the cylinder.

[0006] Furthermore, the internal negative pressure pipe includes a horizontal pipe and a vertical pipe, the horizontal pipe and the vertical pipe are vertically connected, the connection between the horizontal pipe and the vertical pipe is rounded, and the through hole II is provided at the end of the vertical pipe away from the horizontal pipe; the end of the horizontal pipe away from the vertical pipe is inserted into the connecting pipe.

[0007] Furthermore, the through holes II are provided in multiple layers on the riser, and the multiple layers of through holes II are linearly evenly distributed along the length direction of the riser. Each layer of through holes II includes multiple through holes II, and the multiple through holes II in each layer are evenly distributed around the circumference of the riser axis.

[0008] Furthermore, the upper ventilation frame includes four square tubes I, which form a rectangle; the lower ventilation frame includes four square tubes II, which form a rectangle.

[0009] Furthermore, the aforementioned perforated negative pressure tubes are provided with multiple ones in each square tube I and each square tube II, and the multiple perforated negative pressure tubes are linearly evenly distributed along the length direction of square tube I and each square tube II; the aforementioned lower ventilation frame is connected to multiple perforated negative pressure tubes, and both ends of the multiple perforated negative pressure tubes are fixedly connected between two parallel square tubes II of the lower ventilation frame. The lower ventilation frame is connected to the multiple perforated negative pressure tubes, and the multiple perforated negative pressure tubes are linearly evenly distributed along the length direction of the connected square tube II.

[0010] Furthermore, each of the through holes I is provided with multiple layers on the perforated negative pressure tube, and the multiple layers of through holes I are linearly evenly distributed along the length direction of the perforated negative pressure tube. Each layer of through holes I includes multiple through holes I, and the multiple through holes I in each layer are evenly distributed around the circumference of the perforated negative pressure tube with the axis of the perforated negative pressure tube as the center.

[0011] Furthermore, there are multiple connecting pipes on the non-porous negative pressure pipe, and the multiple connecting pipes are all arranged on the upper part of the non-porous negative pressure pipe. The multiple connecting pipes are linearly evenly distributed along the length direction of the non-porous negative pressure pipe, and the outer walls of the multiple connecting pipes are provided with external threads. The cross pipe is inserted into one of the multiple connecting pipes, and a sealing nut cover is connected to the external thread of the connecting pipe for connecting the cross pipe. There is at least one non-porous negative pressure pipe between the upper ventilation frame and the lower ventilation frame.

[0012] Furthermore, each perforated negative pressure tube connected between the upper ventilation frame and the lower ventilation frame is connected to a protective plate on the side facing the center of the cylinder, and the upper and lower ends of the protective plate are fixedly connected to oblique ears, and the two oblique ears are fixedly connected to the upper ventilation frame and the lower ventilation frame respectively, and the protective plate does not contact the perforated negative pressure tube.

[0013] Furthermore, a lifting ear shaft is fixedly connected to the outer wall of the cylinder, and there are two groups of lifting ear shafts. The two groups of lifting ear shafts are respectively connected to the outer walls of the two parallel side walls of the cylinder. Each group of lifting ear shafts includes two lifting ear shafts, and the two lifting ear shafts in each group are symmetrical about the center of the side wall of the cylinder.

[0014] Furthermore, a flip ear shaft is fixedly connected to the outer wall of the cylinder, and two flip ear shafts are provided. The two flip ear shafts are respectively connected to the two side walls of the cylinder body provided with the lifting ear shaft, and the flip ear shaft is provided below the lifting ear shaft.

[0015] The beneficial effects of the present invention are as follows: the utility model first forms a basic sand box by the cylinder body and the bottom plate, and then forms a negative pressure system for fixing the outside of the quartz sand or gem sand by connecting the perforated negative pressure pipe between the upper ventilation frame and the lower ventilation frame and the perforated negative pressure pipe arranged on the lower ventilation frame, At the same time, the upper ventilation frame, the lower ventilation frame and the perforated negative pressure pipe involved in the entire negative pressure system are all connected, and air can be exhausted by the main negative pressure pipe, and then the through hole II at the front end of the riser is arranged in the quartz sand or gem sand near the periphery of the casting cavity by the arrangement of the non-perforated negative pressure pipe and the internal negative pressure pipe, so that the quartz sand or gem sand around the casting cavity is fixed, thereby avoiding box collapse, and the non-perforated negative pressure pipe and the internal negative pressure pipe are also connected with the negative pressure system formed by the upper ventilation frame, the lower ventilation frame and the perforated negative pressure pipe, so air can be exhausted by the main negative pressure pipe, and there is no need to consider the passage of the negative pressure pipe through the box or the additional arrangement of a negative pressure port on the negative pressure equipment. It is easy to use, simple to manufacture and convenient to operate.

[0016] The utility model utilizes a negative pressure tube with a hole, a negative pressure tube without a hole and an inner negative pressure tube to fix the quartz sand or gem sand inside the sand box, thereby solving the problem of box collapse caused by insufficient negative pressure in the inner cavity when box or shell castings are produced using the lost foam casting process. The inner negative pressure tube can be adjusted according to the shape of the casting, is simple to make and easy to operate, and is suitable for the production of various types of box or shell castings. It can also be used to produce castings without an inner cavity structure. The utility model ensures casting quality, reduces the scrap rate, guarantees the construction period and improves economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a side view of the structure of the utility model;

[0018] Figure 2 This is a top view of the structure of the utility model;

[0019] Figure 3 For this utility model Figure 2 AA cross-sectional view;

[0020] Figure 4 This is a structural diagram of the sand box of the utility model;

[0021] Figure 5 For this utility model Figure 4 BB cross-sectional view;

[0022] Figure 6 For this utility model Figure 5 CC cross-sectional view;

[0023] Figure 7 This is a schematic diagram of the structure of the negative pressure tube with holes in the utility model;

[0024] Figure 8 This is a schematic structural diagram of the utility model's hole-free negative pressure tube;

[0025] Figure 9 This is a schematic structural diagram of the internal negative pressure tube of the utility model;

[0026] Figure 10 This is a schematic diagram of the structure of the protection plate of the utility model;

[0027] Figure 11 This is a structural diagram of the upper ventilation frame of the utility model;

[0028] Figure 12 This is a structural diagram of the lower ventilation frame of the present utility model.

[0029] In the figure: 1. Sand box; 101. Cylinder; 102. Bottom plate; 103. Upper ventilation frame; 1031. Square tube I; 104. Lower ventilation frame; 1041. Square tube II; 105. Support tube; 106. Negative pressure tube without hole; 1061. Connecting tube; 1062. External thread; 107. Negative pressure tube with hole; 1071. Through hole I; 2. Lifting ear shaft; 3. Flip ear shaft; 4. Main negative pressure connecting pipe; 5. Internal negative pressure tube; 501. Horizontal tube; 502. Vertical tube; 503. Through hole II; 6. Protective plate; 601. Oblique ear; 7. Sealing nut cover. DETAILED DESCRIPTION

[0030] like Figures 1-12As shown, the utility model is a lost foam casting sand box device including a sand box 1, the sand box 1 includes a cylinder 101, a bottom plate 102, an upper ventilation frame 103, a lower ventilation frame 104, a non-hole negative pressure pipe 106 and a perforated negative pressure pipe 107, the sand box 1 is a cube, the cylinder 101 is a square cylinder with a rectangular cross section; the bottom plate 102 is fixedly connected to the bottom surface of the cylinder 101, the upper ventilation frame 103 and the lower ventilation frame 104 are both rectangular tubes composed of four side tubes. The upper ventilation frame 103 and the lower ventilation frame 104 are fixedly connected to the inside of the cylinder 101, the upper ventilation frame 103 is fixedly connected to the upper end of the inner wall of the cylinder 101, the lower ventilation frame 104 is fixedly connected to the lower end of the inner wall of the cylinder 101, the lower ventilation frame 104 is fixedly connected to the top surface of the bottom plate 102, and the perforated negative pressure tube 107 is fixedly connected between the upper ventilation frame 103 and the lower ventilation frame 104. The rectangular sides are connected with perforated negative pressure tubes 107, which are connected to the upper ventilation frame 103 and the lower ventilation frame 104. The two parallel side tubes of the lower ventilation frame 104 are fixedly connected with a perforated negative pressure tube 107. The perforated negative pressure tube 107 is provided with a plurality of through holes Ⅰ 1071. The non-porous negative pressure tube 106 is fixedly connected between the upper ventilation frame 103 and the lower ventilation frame 104. The non-porous negative pressure tube 106 is connected to the upper ventilation frame 103 and the lower ventilation frame 104. The ventilation frame 104 is connected, and a connecting pipe 1061 is provided on the non-porous negative pressure tube 106. The internal negative pressure tube 5 is inserted into the connecting pipe 1061. The internal negative pressure tube 5 is connected to the non-porous negative pressure tube 106. A through hole II 503 is provided on the side wall of the internal negative pressure tube 5 away from the connecting pipe 1061. The main negative pressure pipe 4 is fixedly connected to the outer wall of the lower ventilation frame 104. The main negative pressure pipe 4 is connected to the lower ventilation frame 104 and passes through the cylinder 101. The internal negative pressure pipe 5 includes a horizontal pipe 501 and a vertical pipe 502. The horizontal pipe 501 and the vertical pipe 502 are vertically connected. The connection between the horizontal pipe 501 and the vertical pipe 502 is rounded. The through hole II 503 is provided at the end of the vertical pipe 502 away from the horizontal pipe 501; the end of the horizontal pipe 501 away from the vertical pipe 502 is inserted into the connecting pipe 1061. The through holes II 503 are provided in multiple layers on the vertical tube 502. The multiple layers of through holes II 503 are linearly and evenly distributed along the length of the vertical tube 502. Each layer of through holes II 503 includes multiple through holes II 503, and the multiple through holes II 503 in each layer are evenly distributed around the axis of the vertical tube 502. The upper ventilation frame 103 includes four square tubes I 1031, which form a rectangle. The lower ventilation frame 104 includes four square tubes II 1041, which form a rectangle.The aforementioned perforated negative pressure tubes 107 are provided in multiple on each square tube I 1031 and each square tube II 1041, and the multiple perforated negative pressure tubes 107 are linearly evenly distributed along the length direction of the square tube I 1031 and each square tube II 1041; the aforementioned lower ventilation frame 104 is connected to multiple perforated negative pressure tubes 107, and both ends of the multiple perforated negative pressure tubes 107 are fixedly connected between two parallel square tubes II 1041 of the lower ventilation frame 104, and the lower ventilation frame 104 is communicated with the multiple perforated negative pressure tubes 107, and the multiple perforated negative pressure tubes 107 are linearly evenly distributed along the length direction of the connected square tube II 1041. Each of the through holes Ⅰ1071 is provided with multiple layers on the perforated negative pressure tube 107, and the multiple layers of through holes Ⅰ1071 are linearly evenly distributed along the length direction of the perforated negative pressure tube 107. Each layer of through holes Ⅰ1071 includes multiple through holes Ⅰ1071, and the multiple through holes Ⅰ1071 in each layer are evenly distributed around the circumference with the axis of the perforated negative pressure tube 107 as the center.

[0031] In order to solve the problem of insufficient negative pressure in the cavity during the pouring process, it is considered to add a negative pressure pipe in the cavity structure. The problem of insufficient negative pressure in the cavity will be solved, and the casting will not have the problem of box collapse. However, if the negative pressure pipe is introduced from the outside of the sand box to the sand box 1, although the problem can be solved, the box penetration operation is not very reliable, and there are too many factors to consider in terms of structure. In addition, it is necessary to open another negative pressure port on the negative pressure equipment before the negative pressure can be introduced into the cavity position. The actual operation is time-consuming and labor-intensive. Therefore, the utility model first forms a basic sand box 1 through the cylinder 101 and the bottom plate 102, and then forms a negative pressure system for fixing the outside of the quartz sand or gem sand inside the sand box 1 through the negative pressure pipe 107 with holes connected between the upper ventilation frame 103 and the lower ventilation frame 104. At the same time, the upper ventilation frame 103 and the lower ventilation frame 103 involved in the entire negative pressure system are the upper ventilation frame 103 and the lower ventilation frame 104. 4 and the perforated negative pressure pipe 107 are all connected, and air can be exhausted through the main negative pressure pipe 4. Then, the through hole II 503 at the front end of the riser 502 is set in the quartz sand or gem sand near the periphery of the casting cavity through the arrangement of the non-porous negative pressure pipe 106 and the internal negative pressure pipe 5, so as to fix the quartz sand or gem sand around the casting cavity, thereby avoiding box collapse. The non-porous negative pressure pipe 106 and the internal negative pressure pipe 5 are also connected with the negative pressure system formed by the upper ventilation frame 103, the lower ventilation frame 104 and the perforated negative pressure pipe 107, so air can be exhausted through the main negative pressure pipe 4, and there is no need to consider the passage of the negative pressure pipe through the box or to set up a negative pressure port on the negative pressure equipment. It is easy to use, simple to manufacture and convenient to operate.

[0032] There are multiple connecting tubes 1061 on the non-porous negative pressure tube 106, and the multiple connecting tubes 1061 are all arranged on the upper part of the non-porous negative pressure tube 106. The multiple connecting tubes 1061 are linearly evenly distributed along the length direction of the non-porous negative pressure tube 106. The outer walls of the multiple connecting tubes 1061 are provided with external threads 1062. The cross tube 501 is inserted into one of the multiple connecting tubes 1061. A sealing nut cover 7 is connected to the external thread 1062 of the connecting tube 1061 for connecting the cross tube 501. There is at least one non-porous negative pressure tube 106 between the upper ventilation frame 103 and the lower ventilation frame 104.

[0033] The setting of multiple connecting pipes 1061 improves the flexibility of use of the utility model. The appropriate connecting pipe 1061 can be selected according to the different shapes of different yellow molds, so that the through hole II503 at the front end of the vertical pipe 502 is better set at the appropriate position. The unused connecting pipe 1061 can be sealed with a sealing nut cover 7 without affecting the use; and if multiple hole-free negative pressure pipes 106 are set, it is also to improve Shi Yonghong's flexibility. Figure 5 and Figure 6 As shown, in this embodiment, a total of four non-porous negative pressure tubes 106 are provided, and three connecting tubes 1061 are provided on each non-porous negative pressure tube 106. In actual use, multiple internal negative pressure tubes 5 can also be designed for use to better fix the quartz sand or gem sand around the casting cavity. However, the use of multiple internal negative pressure tubes 5 must take into account the size of the casting in the space inside the sand box 1.

[0034] It should also be noted that, before burying the box, the present invention requires that stainless steel sand mesh be wrapped around the outer walls of all perforated negative pressure pipes 107 and vertical pipes 502 to isolate the sand. In this embodiment, the stainless steel sand mesh is 100 mesh and is provided in two layers.

[0035] In order to prevent sand from entering the connection between the transverse pipe 501 and the connecting pipe 1061, vacuum sealing mud can be used to block the connection between the transverse pipe 501 and the connecting pipe 1061 during use.

[0036] Each perforated negative pressure tube 107 connected between the upper ventilation frame 103 and the lower ventilation frame 104 is connected to a protective plate 6 on the side facing the center of the cylinder 101, and the upper and lower ends of the protective plate 6 are fixedly connected to oblique ears 601. The two oblique ears 601 are respectively fixedly connected to the upper ventilation frame 103 and the lower ventilation frame 104, and the protective plate 6 does not contact the perforated negative pressure tube 107.

[0037] The protection plate 6 is provided to protect the perforated negative pressure pipe 107 and the stainless steel sand mesh wound on the perforated negative pressure pipe 107 to prevent the casting from scratching the perforated negative pressure pipe 107 and / or the perforated negative pressure pipe 107 during sand cleaning.

[0038] A lifting ear shaft 2 is fixedly connected to the outer wall of the cylinder 101. There are two groups of lifting ear shafts 2. The two groups of lifting ear shafts 2 are respectively connected to the outer walls of the two parallel side walls of the cylinder 101. Each group of lifting ear shafts 2 includes two lifting ear shafts 2. The two lifting ear shafts 2 in each group are symmetrical with the center of the side wall of the cylinder 101; a flip ear shaft 3 is fixedly connected to the outer wall of the cylinder 101. There are two flip ear shafts 3. The two flip ear shafts 3 are respectively connected to the two side walls of the cylinder 101 with the lifting ear shaft 2, and the flip ear shaft 3 is arranged below the lifting ear shaft 2.

[0039] The arrangement of the lifting trunnion 2 and the turning trunnion 3 is used to facilitate the lifting and turning of the utility model.

[0040] The use process of this utility model is:

[0041] First, place a layer of precious sand at the bottom of the sand box 1 and vibrate it tightly. The specific height should be determined according to the size of the casting. Then place the yellow mold on top of the padded sand layer, and fix the yellow mold with sand according to the process requirements. Then slowly place one end of the internal negative pressure tube 5 in the center of the casting cavity, and insert the other end into the internal negative pressure interface to ensure that the internal negative pressure tube 5 does not contact the coating layer of the yellow mold. After fixing the two firmly, you can start the sand placing and burying box operation. When the sand placing height is close to the connecting pipe 1061, vibrate the sand box for the second time to ensure that the precious sand in the inner cavity of the casting is completely filled. After the vibration is over, use the sealing mud strip to wrap the matching position of the mobile negative pressure tube and the internal negative pressure interface 2-3 times to prevent sand from entering the negative pressure system. Then bury the sand box completely, and finally move the sand box to the pouring area, connect the main negative pressure pipe to the main negative pressure interface of the sand box, and wait for pouring.

[0042] The utility model utilizes a perforated negative pressure tube 107, a non-perforated negative pressure tube 106 and an internal negative pressure tube 5 to fix the quartz sand or gem sand inside the sand box 1, thereby solving the problem of box collapse caused by insufficient internal cavity negative pressure when box or shell castings are produced using the lost foam casting process. The internal negative pressure tube 5 can be adjusted according to the shape of the casting, is simple to make and easy to operate, and is suitable for the production of various types of box or shell castings. It can also be used to produce castings without an internal cavity structure. The utility model ensures casting quality, reduces the scrap rate, guarantees construction period, and improves economic benefits.

Claims

1. A lost foam casting sand box device, comprising a sand box (1), characterized in that: The sand box (1) includes a cylinder (101), a bottom plate (102), an upper ventilation frame (103), a lower ventilation frame (104), a negative pressure pipe without holes (106) and a negative pressure pipe with holes (107). The sand box (1) is a cube, and the cylinder (101) is a square tube with a rectangular cross section; the bottom plate (102) is fixedly connected to the bottom surface of the cylinder (101), and the upper ventilation frame (103) and the lower ventilation frame (104) are both rectangular frames composed of four side tubes. ) are fixedly connected to the inside of the cylinder (101), the upper ventilation frame (103) is fixedly connected to the upper end of the inner wall of the cylinder (101), the lower ventilation frame (104) is fixedly connected to the lower end of the inner wall of the cylinder (101), the lower ventilation frame (104) is fixedly connected to the top surface of the bottom plate (102), the perforated negative pressure pipe (107) is fixedly connected between the upper ventilation frame (103) and the lower ventilation frame (104), and the four rectangular sides of the upper ventilation frame (103) and the lower ventilation frame (104) are connected with a perforated negative pressure pipe ( 107), the perforated negative pressure tube (107) is connected to the upper ventilation frame (103) and the lower ventilation frame (104), the perforated negative pressure tube (107) is fixedly connected between the two parallel side tubes of the lower ventilation frame (104), the perforated negative pressure tube (107) is provided with a plurality of through holes I (1071), the non-perforated negative pressure tube (106) is fixedly connected between the upper ventilation frame (103) and the lower ventilation frame (104), the non-perforated negative pressure tube (106) is connected to the upper ventilation frame (103) and the lower ventilation frame (104), A connecting pipe (1061) is provided on the holeless negative pressure pipe (106), an internal negative pressure pipe (5) is inserted into the connecting pipe (1061), the internal negative pressure pipe (5) is communicated with the holeless negative pressure pipe (106), a through hole II (503) is provided on the side wall of the internal negative pressure pipe (5) away from the connecting pipe (1061), a main negative pressure connecting pipe (4) is fixedly connected to the outer wall of the lower ventilation frame (104), the main negative pressure connecting pipe (4) is communicated with the lower ventilation frame (104), and the main negative pressure connecting pipe (4) passes through the cylinder (101).

2. The lost foam casting flask device according to claim 1, characterized in that: The internal negative pressure tube (5) includes a horizontal tube (501) and a vertical tube (502). The horizontal tube (501) and the vertical tube (502) are vertically connected. The connection between the horizontal tube (501) and the vertical tube (502) is rounded. The through hole II (503) is provided at the end of the vertical tube (502) away from the horizontal tube (501); the end of the horizontal tube (501) away from the vertical tube (502) is inserted into the connecting tube (1061).

3. The lost foam casting flask device according to claim 2, characterized in that: The through holes II (503) are provided in multiple layers on the vertical pipe (502), and the multiple layers of through holes II (503) are linearly and evenly distributed along the length direction of the vertical pipe (502). Each layer of through holes II (503) includes multiple through holes II (503), and the multiple through holes II (503) in each layer are evenly distributed around the circumference with the axis of the vertical pipe (502) as the center.

4. The lost foam casting flask device according to claim 3, characterized in that: The upper ventilation frame (103) includes four square tubes I (1031), and the four square tubes I (1031) form a rectangle. The lower ventilation frame (104) includes four square tubes II (1041), and the four square tubes II (1041) form a rectangle.

5. The lost foam casting flask device according to claim 4, characterized in that: The perforated negative pressure tubes (107) are provided in plurality on each square tube I (1031) and each square tube II (1041), and the plurality of perforated negative pressure tubes (107) are linearly and evenly distributed along the length direction of the square tube I (1031) and each square tube II (1041); the lower ventilation frame (104) is connected with a plurality of perforated negative pressure tubes (107), both ends of the plurality of perforated negative pressure tubes (107) are fixedly connected between two parallel square tubes II (1041) of the lower ventilation frame (104), the lower ventilation frame (104) is communicated with the plurality of perforated negative pressure tubes (107), and the plurality of perforated negative pressure tubes (107) are linearly and evenly distributed along the length direction of the connected square tubes II (1041).

6. The lost foam casting flask device according to claim 5, characterized in that: Each of the through holes I (1071) is provided with multiple layers on the perforated negative pressure tube (107), and the multiple layers of through holes I (1071) are linearly and evenly distributed along the length direction of the perforated negative pressure tube (107). Each layer of through holes I (1071) includes multiple through holes I (1071), and the multiple through holes I (1071) in each layer are evenly distributed around the circumference of the perforated negative pressure tube (107) as the center axis.

7. The lost foam casting flask device according to claim 6, characterized in that: The connecting tubes (1061) are provided in plurality on the non-porous negative pressure tube (106), and the plurality of connecting tubes (1061) are all provided on the upper part of the non-porous negative pressure tube (106). The plurality of connecting tubes (1061) are linearly and evenly distributed along the length direction of the non-porous negative pressure tube (106), and the outer walls of the plurality of connecting tubes (1061) are all provided with external threads (1062). The transverse tube (501) is inserted into one of the plurality of connecting tubes (1061), and a sealing nut cover (7) is connected to the external thread (1062) of the connecting tube (1061) for connecting the transverse tube (501). The non-porous negative pressure tube (106) is provided with at least one between the upper ventilation frame (103) and the lower ventilation frame (104).

8. The lost foam casting flask device according to claim 7, characterized in that: Each perforated negative pressure tube (107) connected between the upper ventilation frame (103) and the lower ventilation frame (104) is connected to a protective plate (6) on one side facing the center of the cylinder (101). The upper and lower ends of the protective plate (6) are fixedly connected to oblique ears (601). The two oblique ears (601) are respectively fixedly connected to the upper ventilation frame (103) and the lower ventilation frame (104). The protective plate (6) does not contact the perforated negative pressure tube (107).

9. The lost foam casting flask device according to any one of claims 1 to 8, characterized in that: A lifting trunnion (2) is fixedly connected to the outer wall of the cylinder (101), and two groups of lifting trunnions (2) are provided. The two groups of lifting trunnions (2) are respectively connected to the outer walls of two parallel side walls of the cylinder (101), and each group of lifting trunnions (2) includes two lifting trunnions (2). The two lifting trunnions (2) in each group are symmetrical with respect to the center of the side wall of the cylinder (101).

10. The lost foam casting flask device according to claim 9, characterized in that: A flip trunnion (3) is fixedly connected to the outer wall of the cylinder (101), and two flip trunnions (3) are provided. The two flip trunnions (3) are respectively connected to the two side walls of the cylinder (101) provided with the lifting trunnion (2), and the flip trunnion (3) is provided below the lifting trunnion (2).

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