Automatic molding sand molding machine

Abstract

The invention relates to the technical field of casting equipment, in particular to an automatic molding sand molding machine which comprises a rack, a mold shell, an upper pressing assembly and a lower pressing assembly. The upper pressing assembly, the mold shell and the lower pressing assembly are sequentially arranged on the rack. An upper mold surface and a lower mold surface are arranged at the upper end and the lower end of the mold shell correspondingly, and the upper pressing assembly can conduct sand blasting and air spraying on the upper mold surface. The downward pressing assembly can conduct sand blasting and air spraying on the lower mold face. The upper die surface comprises a first conveying part and a second conveying part. And the structure of the lower die surface is the same as that of the upper die surface. According to the automatic molding machine for the molding sand, a molding sand molding mode of firstly drying and then demolding is adopted, when the molding sand is dried, the first conveying part and the second conveying part are arranged on the upper mold surface and the lower mold surface, so that gas can be more uniformly distributed at all positions of the molding sand, and the uniformity of the gas passing through all positions of the molding sand is improved; and the molding sand forming quality is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of casting equipment, and in particular to an automatic sand molding machine. Background Art

[0002] In the foundry industry, the sand molding machine is a type of casting equipment used to make sand molds, which mainly includes steps such as filling sand, compacting sand and demolding. Sand molding is the basic link in casting production, and the accuracy and stability of its process have a profound impact on subsequent casting, molding and other processes.

[0003] In the demoulding stage of the automatic molding sand machine in the prior art, the structure of the molding sand is not stable because the molding sand has just been separated from the mold. Therefore, the structure of the molding sand is easily damaged. Even a slight collision may cause defects such as depressions and cracks on the surface of the molding sand. After entering the drying stage, heat transfer mainly depends on the contact conduction between the molding sand and the bottom surface and the convection of the surrounding hot air. This single heat transfer method makes the drying of the molding sand extremely uneven. When the outside of the molding sand has reached the drying standard, a large amount of moisture is often left inside, affecting the quality of the molding sand after drying. Summary of the invention

[0004] The invention provides an automatic molding sand molding machine to solve the problem that the existing automatic molding sand molding machine adopts the method of demoulding first and then drying, the molding sand is easily damaged during the demoulding process, and the drying is not uniform, which affects the quality of the dried molding sand.

[0005] An automatic molding machine for molding sand of the present invention adopts the following technical scheme: an automatic molding machine for molding sand comprises a frame, a mold shell, an upper pressure assembly and a lower pressure assembly; the upper pressure assembly, the mold shell and the lower pressure assembly are arranged in sequence on the frame along a first direction, the first direction is a vertical direction, and the upper pressure assembly is located above the mold shell; the upper pressure assembly and the lower pressure assembly can both move up and down, the interior of the mold shell is hollow, and an exhaust port is opened on the mold shell; the upper and lower ends of the mold shell are respectively provided with an upper mold surface and a lower mold surface, the upper pressure assembly can blast sand and spray air on the upper mold surface; the lower pressure assembly can blast sand and spray air on the lower mold surface; the upper mold surface comprises a first conveying part and a second conveying part; the first conveying part and the second conveying part are arranged in sequence in the flow direction of the gas, and a plurality of adjusting balls are arranged between the first conveying part and the second conveying part, the adjusting balls are made of rubber, the gas can pass through the first conveying part, and enter the mold shell from the second conveying part after passing through the plurality of adjusting balls; the structure of the lower mold surface is the same as that of the upper mold surface.

[0006] Furthermore, the first conveying part includes a first conveying layer, and the second conveying part includes a second conveying layer; the first conveying layer and the second conveying layer are arranged in sequence in the flow direction of the gas, and a plurality of adjustment balls are located between the first conveying layer and the second conveying layer.

[0007] Furthermore, the first conveying part also includes a first supporting layer, and the second conveying part also includes a second supporting layer. The first conveying layer, the first supporting layer, the second conveying layer and the second supporting layer are arranged in sequence in the flow direction of the gas, and a plurality of adjusting balls are located between the first supporting layer and the second supporting layer.

[0008] Furthermore, a plurality of pores are formed on the first supporting layer and the second supporting layer.

[0009] Furthermore, the first conveying layer and the second conveying layer are both made of porous ceramic materials.

[0010] Furthermore, the upper pressure assembly includes an upper pressure plate, and the lower pressure assembly includes a lower pressure plate. The upper pressure plate can be installed on the frame so as to move up and down, and the lower pressure plate is fixedly installed on the frame. The mold shell is located between the upper pressure plate and the lower pressure plate; both the upper pressure plate and the lower pressure plate are provided with multiple sandblasting ports and multiple air jet ports.

[0011] Furthermore, the upper pressing plate is mounted on the frame via a first hydraulic component, and the first hydraulic component is used to drive the upper pressing plate to move up and down.

[0012] Furthermore, the upper pressure assembly also includes an upper baffle plate, and the lower pressure assembly also includes a lower baffle plate. The upper baffle plate can be installed on the frame so as to be movably mounted up and down, and the upper baffle plate and the upper pressure plate can slide relative to each other; the upper baffle plate can abut against the upper end surface of the mold shell, and the lower baffle plate can be installed on the frame so as to be movably mounted up and down, and the lower baffle plate can abut against the lower end surface of the mold shell.

[0013] Furthermore, the upper baffle is installed on the frame through a second hydraulic component, and the second hydraulic component is used to drive the upper baffle to move up and down; the lower baffle is installed on the frame through a third hydraulic component, and the third hydraulic component is used to drive the lower baffle to move up and down.

[0014] Furthermore, a push plate is provided on the frame, and the push plate can move along a second direction to push the molding sand out of the frame, and the second direction is a horizontal direction.

[0015] The beneficial effects of the present invention are as follows: an automatic molding machine for molding sand of the present invention adopts a molding sand molding method of drying first and then demolding. When drying the molding sand, by arranging a first conveying part and a second conveying part on the upper mold surface and the lower mold surface, the gas can be more evenly distributed in various parts of the molding sand, thereby improving the uniformity of gas passing through various positions of the molding sand, thereby improving the molding quality of the molding sand, and the gas sprayed from the upper pressure component can also play a secondary pressure role on the molding sand between the upper mold surface and the upper pressure component. Similarly, the gas sprayed from the lower pressure component can also play a secondary pressure role on the molding sand between the lower mold surface and the lower pressure component, so that the mechanical strength of the molding sand is higher, and the molding quality of the molding sand is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the overall structure of an embodiment of an automatic sand molding machine of the present invention;

[0018] Figure 2 A cross-sectional view of the overall structure of an embodiment of an automatic sand molding machine of the present invention;

[0019] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0020] Figure 4 A schematic diagram of a mold shell of an embodiment of an automatic sand molding machine of the present invention;

[0021] Figure 5 It is a front view of a mold shell of an embodiment of an automatic sand molding machine of the present invention;

[0022] Figure 6 for Figure 5 Sectional view along the middle line BB;

[0023] Figure 7 for Figure 6 Enlarged view of point C in the middle.

[0024] In the figure: 100, frame; 200, mold shell; 210, exhaust port; 220, upper mold surface; 230, lower mold surface; 240, adjusting ball; 250, first conveying layer; 260, second conveying layer; 270, first supporting layer; 280, second supporting layer; 290, air hole; 300, upper pressure assembly; 310, upper pressure plate; 311, sandblasting port; 312, air jet; 320, first hydraulic component; 330, upper baffle; 340, second hydraulic component; 400, lower pressure assembly; 410, lower pressure plate; 420, lower baffle; 430, third hydraulic component; 500, push plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] An embodiment of an automatic molding sand molding machine of the present invention is as follows Figures 1 to 7 shown.

[0027] A sand molding automatic molding machine includes a frame 100, a mold shell 200, an upper pressure assembly 300 and a lower pressure assembly 400. The upper pressure assembly 300, the mold shell 200 and the lower pressure assembly 400 are arranged in sequence on the frame 100 along a first direction, the first direction is a vertical direction, and the upper pressure assembly 300 is located above the mold shell 200. The upper pressure assembly 300 and the lower pressure assembly 400 can both move up and down, the mold shell 200 is hollow inside, and an exhaust port 210 is opened on the mold shell 200. The upper and lower ends of the mold shell 200 are respectively provided with an upper mold surface 220 and a lower mold surface 230, and the upper pressure assembly 300 can blast sand and spray air on the upper mold surface 220. The lower pressure assembly 400 can blast sand and spray air on the lower mold surface 230. The upper mold surface 220 includes a first conveying portion and a second conveying portion. The first conveying part and the second conveying part are sequentially arranged in the flow direction of the gas, and a plurality of adjusting balls 240 are arranged between the first conveying part and the second conveying part. The adjusting balls 240 are made of rubber. The gas can pass through the first conveying part, and enter the mold shell 200 from the second conveying part after passing through the plurality of adjusting balls 240, and finally be discharged from the exhaust port 210. The structure of the lower mold surface 230 is the same as that of the upper mold surface 220.

[0028] In this embodiment, the mold shell 200, the upper pressing assembly 300 and the lower pressing assembly 400 are arranged on the frame 100. When in use, the mold shell 200 is first placed between the upper pressing assembly 300 and the lower pressing assembly 400, and then the upper pressing assembly 300 is used to blast sand on the upper mold surface 220, and the lower pressing assembly 400 is used to blast sand on the lower mold surface 230. After the sandblasting is completed, the upper pressing assembly 300 and the lower pressing assembly 400 are driven to move up and down to compact the molding sand.

[0029] Then, the upper pressure assembly 300 is used to spray air onto the upper mold surface 220, and the hot air will take away the moisture in the molding sand, and the molding sand between the upper mold surface 220 and the upper pressure assembly 300 will be dried. At the same time, the lower pressure assembly 400 is used to spray air onto the lower mold surface 230, and the hot air will take away the moisture in the molding sand, and the molding sand between the lower mold surface 230 and the lower pressure assembly 400 will be dried. In the drying process, the molding sand between the upper mold surface 220 and the upper pressure assembly 300 is used as an example for explanation. When the gas sprayed from the upper pressure assembly 300 passes through the molding sand and passes through the upper mold surface 220, the gas will pass through the first conveying part, and after passing through a plurality of adjusting balls 240, it will pass through the second conveying part into the mold shell 200, and finally be discharged from the exhaust port 210. However, when the amount of gas passing through a certain position of the upper mold surface 220 is large, the environment of the adjusting balls 240 at this position is hotter. Due to the effect of thermal expansion and contraction, the volume of this part of the adjusting balls 240 will be larger than the volume of other adjusting balls 240, thereby making the gaps between the multiple adjusting balls 240 at this position smaller. When passing through this position, it is less likely for the gas to pass through the gaps between the multiple adjusting balls 240 corresponding to this position. The gas will be more inclined to pass through other positions on the upper mold surface 220, thereby improving the uniformity of the gas passing through each position of the molding sand, thereby improving the quality of the molding sand. Finally, the mold sand after drying and molding can be taken out.

[0030] That is, the present embodiment adopts a molding sand method of drying first and then demolding. When drying the molding sand, by arranging a first conveying portion and a second conveying portion on the upper mold surface 220 and the lower mold surface 230, the gas can be more evenly distributed in various parts of the molding sand, thereby improving the uniformity of the gas passing through various positions of the molding sand, thereby improving the molding quality of the molding sand, and the gas sprayed from the upper pressure assembly 300 can also play a secondary pressure role on the molding sand between the upper mold surface 220 and the upper pressure assembly 300. Similarly, the gas sprayed from the lower pressure assembly 400 can also play a secondary pressure role on the molding sand between the lower mold surface 230 and the lower pressure assembly 400, thereby making the mechanical strength of the molding sand higher and further improving the molding quality of the molding sand.

[0031] In this embodiment, the first conveying part includes a first conveying layer 250, and the second conveying part includes a second conveying layer 260. The first conveying layer 250 and the second conveying layer 260 are sequentially arranged in the flow direction of the gas, and a plurality of adjusting balls 240 are located between the first conveying layer 250 and the second conveying layer 260. The gas can pass through the first conveying layer 250, and after passing through the plurality of adjusting balls 240, enter the mold shell 200 from the second conveying layer 260, and finally be discharged from the exhaust port 210.

[0032] Furthermore, the first conveying part also includes a first supporting layer 270, and the second conveying part also includes a second supporting layer 280. The first conveying layer 250, the first supporting layer 270, the second conveying layer 260 and the second supporting layer 280 are arranged in sequence in the flow direction of the gas, and a plurality of adjusting balls 240 are located between the first supporting layer 270 and the second supporting layer 280. The gas can pass through the first conveying layer 250, and after passing through the first supporting layer 270, enter the second conveying layer 260 through the plurality of adjusting balls 240, and enter the mold shell 200 after passing through the second supporting layer 280, and finally be discharged from the exhaust port 210.

[0033] Specifically, a plurality of air holes 290 are formed on the first supporting layer 270 and the second supporting layer 280 .

[0034] The cross sections of the first transport layer 250 , the first support layer 270 , the second transport layer 260 and the second support layer 280 are all arc-shaped, and the first transport layer 250 and the second transport layer 260 are both made of porous ceramic materials to allow gas to pass through.

[0035] When in use, the first support layer 270 is used to support the first conveying layer 250, and the second support layer 280 is used to support the second conveying layer 260. When the molding sand is dried, the gas will pass through the first conveying layer 250, and after passing through the air holes 290 on the first support layer 270, enter the second conveying layer 260 from the gaps between the plurality of adjusting balls 240, and after passing through the air holes 290 on the second support layer 280, enter the mold shell 200, and finally be discharged from the exhaust port 210.

[0036] In this embodiment, the upper pressing assembly 300 includes an upper pressing plate 310, and the lower pressing assembly 400 includes a lower pressing plate 410. The upper pressing plate 310 is movably mounted on the frame 100, and the lower pressing plate 410 is fixedly mounted on the frame 100. The mold shell 200 is located between the upper pressing plate 310 and the lower pressing plate 410. A plurality of sandblasting ports 311 and a plurality of air jet ports 312 are provided on the upper pressing plate 310 and the lower pressing plate 410.

[0037] Specifically, the upper platen 310 is mounted on the frame 100 via a first hydraulic component 320, and the first hydraulic component 320 is used to drive the upper platen 310 to move up and down. The first hydraulic component 320 is a hydraulic cylinder.

[0038] When in use, the mold shell 200 is placed between the upper platen 310 and the lower platen 410, and then the upper platen 310 is driven to move downward, and then the sandblasting port 311 on the upper platen 310 is activated to blast sand toward the upper mold surface 220, and the sandblasting port 311 on the lower platen 410 is activated to blast sand toward the lower mold surface 230. After the sandblasting is completed, the upper platen 310 is driven to move downward to compact the molding sand, and then the air jet 312 on the upper platen 310 is activated to spray air toward the upper mold surface 220, and the air jet 312 on the lower platen 410 is activated to spray air toward the lower mold surface 230 to dry the molding sand.

[0039] Furthermore, the upper pressing assembly 300 further includes an upper baffle 330, and the lower pressing assembly 400 further includes a lower baffle 420. The upper baffle 330 is mounted on the frame 100 so as to be movable up and down, and the upper baffle 330 and the upper pressing plate 310 can slide relative to each other. The upper baffle 330 can abut against the upper end surface of the mold shell 200, and the lower baffle 420 is mounted on the frame 100 so as to be movable up and down, and the lower baffle 420 can abut against the lower end surface of the mold shell 200.

[0040] Specifically, the upper baffle 330 is mounted on the frame 100 through the second hydraulic component 340, and the second hydraulic component 340 is used to drive the upper baffle 330 to move up and down. The lower baffle 420 is mounted on the frame 100 through the third hydraulic component 430, and the third hydraulic component 430 is used to drive the lower baffle 420 to move up and down. The second hydraulic component 340 and the third hydraulic component 430 are both hydraulic cylinders.

[0041] By setting the upper baffle plate 330 and the lower baffle plate 420, after the mold shell 200 is placed between the upper pressing plate 310 and the lower pressing plate 410, the second hydraulic component 340 and the third hydraulic component 430 are driven to operate, so that the upper baffle plate 330 abuts against the upper end surface of the mold shell 200, and the lower baffle plate 420 abuts against the lower end surface of the mold shell 200. After the sandblasting is completed, when the upper pressing plate 310 is driven to move downward, in the process of compacting the molding sand, the upper baffle plate 330 moves with the upper pressing plate 310 and keeps abutting against the upper end surface of the mold shell 200, and the lower baffle plate 420 moves with the mold shell 200 and keeps abutting against the lower end surface of the mold shell 200, and the upper baffle plate 330 and the lower baffle plate 420 are used to support and limit the mold shell 200.

[0042] In this embodiment, a push plate 500 is disposed on the frame 100, and the push plate 500 can move along the second direction and push the molding sand out of the frame 100. The second direction is a horizontal direction.

[0043] The frame 100 is provided with a driving mechanism, which is used to drive the mold shell 200 to move in the first direction and the second direction. The driving mechanism is a prior art, and specifically can be hydraulically driven.

[0044] When in use, the mold shell 200 is moved in the second direction by the driving mechanism so that the mold shell 200 is located between the upper pressing plate 310 and the lower pressing plate 410, and then sandblasting and drying operations are performed. For the convenience of explanation, the molding sand between the upper pressing plate 310 and the mold shell 200 is called the upper half molding sand, and the molding sand between the lower pressing plate 410 and the mold shell 200 is called the lower half molding sand. After drying, the upper pressing plate 310 is first moved upward to drive the upper half molding sand upward, and then the mold shell 200 is lifted by the driving mechanism to separate the mold shell 200 from the lower half molding sand, and then the driving mechanism is used to drive the mold shell 200 to move in the second direction to remove the mold shell 200. After that, the upper pressing plate 310 is driven downward again to combine the upper half molding sand with the lower half molding sand, and finally the molding sand is pushed out as a whole by the push plate 500 to complete the molding of the molding sand.

[0045] In combination with the above embodiments, the specific working principle is as follows:

[0046] When in use, the driving mechanism is first used to move the mold shell 200 along the second direction so that the mold shell 200 comes between the upper pressing plate 310 and the lower pressing plate 410. After the mold shell 200 is placed between the upper pressing plate 310 and the lower pressing plate 410, the second hydraulic component 340 and the third hydraulic component 430 are driven to operate so that the upper baffle plate 330 abuts against the upper end surface of the mold shell 200, and the lower baffle plate 420 abuts against the lower end surface of the mold shell 200.

[0047] Then, the sandblasting port 311 on the upper platen 310 is started to blast sand on the upper mold surface 220, and the sandblasting port 311 on the lower platen 410 is started to blast sand on the lower mold surface 230. After the sandblasting is completed, the upper platen 310 is driven to move downward to compact the molding sand, and in the process of driving the upper platen 310 to move downward to compact the molding sand, the upper baffle 330 moves with the upper platen 310 to keep in contact with the upper end surface of the mold shell 200, and the lower baffle 420 moves with the mold shell 200 to keep in contact with the lower end surface of the mold shell 200, and the upper baffle 330 and the lower baffle 420 are used to support and limit the mold shell 200.

[0048] Then, the air jets 312 on the upper platen 310 are started to spray air toward the upper mold surface 220, and the air jets 312 on the lower platen 410 are started to spray air toward the lower mold surface 230, so as to dry the molding sand. In the drying process, the molding sand between the upper mold surface 220 and the upper press assembly 300 is used as an example for explanation. When the gas ejected from the upper press assembly 300 passes through the molding sand and passes through the upper mold surface 220, the gas will pass through the first conveying layer 250, and after passing through the air holes 290 on the first supporting layer 270, the gas will enter the second conveying layer 260 from the gaps between the plurality of adjusting balls 240, and after passing through the air holes 290 on the second supporting layer 280, enter the mold shell 200, and finally be discharged from the exhaust port 210.

[0049] However, when a large amount of gas passes through a certain position on the upper mold surface 220, the environment of the adjusting balls 240 at this position is hotter. Due to the effect of thermal expansion and contraction, the volume of this part of the adjusting balls 240 will be larger than the volume of other adjusting balls 240, thereby making the gaps between the multiple adjusting balls 240 at this position smaller. When passing through this position, it is less likely for the gas to pass through the gaps between the multiple adjusting balls 240 corresponding to this position. The gas will be more inclined to pass through other positions on the upper mold surface 220, thereby improving the uniformity of the gas passing through various positions of the molding sand, thereby improving the quality of the molding sand.

[0050] After drying is completed, the upper pressing plate 310 is first moved upward to drive the upper half of the molding sand upward, and then the mold shell 200 is lifted by the driving mechanism to separate the mold shell 200 from the lower half of the molding sand, and then the mold shell 200 is driven by the driving mechanism to move in the second direction to remove the mold shell 200. Then, the upper pressing plate 310 is driven downward again to combine the upper half of the molding sand with the lower half of the molding sand, and finally the pushing plate 500 is used to push the molding sand out as a whole to complete the molding of the molding sand.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic sand molding machine, characterized in that: It includes a frame, a mold shell, an upper pressure assembly and a lower pressure assembly; the upper pressure assembly, the mold shell and the lower pressure assembly are arranged in sequence on the frame along a first direction, the first direction is a vertical direction, and the upper pressure assembly is located above the mold shell; the upper pressure assembly and the lower pressure assembly can both move up and down, the mold shell is hollow inside, and an exhaust port is opened on the mold shell; the upper and lower ends of the mold shell are respectively provided with an upper mold surface and a lower mold surface, the upper pressure assembly can sandblast and spray air on the upper mold surface; the lower pressure assembly can sandblast and spray air on the lower mold surface; the upper mold surface includes a first conveying part and a second conveying part; the first conveying part and the second conveying part are arranged in sequence in the flow direction of the gas, and a plurality of adjusting balls are arranged between the first conveying part and the second conveying part, the adjusting balls are made of rubber, the gas can pass through the first conveying part, and enter the mold shell from the second conveying part after passing through a plurality of adjusting balls; the structure of the lower mold surface is the same as that of the upper mold surface.

2. The automatic molding sand machine according to claim 1, characterized in that: The first conveying part includes a first conveying layer, and the second conveying part includes a second conveying layer; the first conveying layer and the second conveying layer are arranged in sequence in the flow direction of the gas, and a plurality of adjustment balls are located between the first conveying layer and the second conveying layer.

3. The automatic molding sand machine according to claim 2, characterized in that: The first conveying part also includes a first supporting layer, and the second conveying part also includes a second supporting layer. The first conveying layer, the first supporting layer, the second conveying layer and the second supporting layer are arranged in sequence in the flow direction of the gas, and a plurality of adjusting balls are located between the first supporting layer and the second supporting layer.

4. The automatic molding sand machine according to claim 3, characterized in that: A plurality of pores are formed on the first supporting layer and the second supporting layer.

5. The automatic molding sand machine according to claim 2, characterized in that: The first conveying layer and the second conveying layer are both made of porous ceramic materials.

6. The automatic molding sand machine according to claim 1, characterized in that: The upper pressing assembly includes an upper pressing plate, and the lower pressing assembly includes a lower pressing plate. The upper pressing plate can be installed on the frame so as to move up and down, and the lower pressing plate is fixedly installed on the frame. The mold shell is located between the upper pressing plate and the lower pressing plate. Multiple sandblasting ports and multiple air jet ports are provided on the upper pressing plate and the lower pressing plate.

7. The automatic molding sand machine according to claim 6, characterized in that: The upper pressing plate is installed on the frame through a first hydraulic component, and the first hydraulic component is used to drive the upper pressing plate to move up and down.

8. The automatic molding sand machine according to claim 6, characterized in that: The upper pressure assembly also includes an upper baffle plate, and the lower pressure assembly also includes a lower baffle plate. The upper baffle plate can be installed on the frame so as to move up and down, and the upper baffle plate and the upper pressure plate can slide relative to each other; the upper baffle plate can abut against the upper end surface of the mold shell, and the lower baffle plate can be installed on the frame so as to move up and down, and the lower baffle plate can abut against the lower end surface of the mold shell.

9. The automatic molding sand machine according to claim 8, characterized in that: The upper baffle is installed on the frame through the second hydraulic component, and the second hydraulic component is used to drive the upper baffle to move up and down; the lower baffle is installed on the frame through the third hydraulic component, and the third hydraulic component is used to drive the lower baffle to move up and down.

10. The automatic molding sand machine according to claim 1, characterized in that: A push plate is arranged on the frame, and the push plate can move along a second direction to push the molding sand out of the frame, and the second direction is a horizontal direction.

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