An overturning anti-gravity casting device

Abstract

The present invention relates to the technical field of metal casting, and particularly relates to a tilting counter-gravity casting device, which includes a counter-gravity casting mechanism. The counter-gravity casting mechanism includes a casting mechanism. The casting mechanism includes a limiting cylinder and a rotating shaft. The rotating shaft is coaxially arranged with the limiting cylinder and can rotate within the limiting cylinder. An installation groove for accommodating a mold is provided on the outer wall of the rotating shaft. A liquid injection channel is connected to the outer wall of the limiting cylinder. A liquid inlet channel is formed in the rotating shaft. One end of the liquid inlet channel penetrates through the bottom of the installation groove and is used for sealingly docking with the pouring port of the mold in the installation groove. The other end of the liquid inlet channel is communicated with the liquid injection channel. The electromagnetic drive structure presses the molten metal into the mold through the liquid injection channel and the liquid inlet channel. After the mold in the installation groove is filled, the rotating shaft rotates, driving the mold to tilt 180°, so that the pouring port of the mold faces upward until the molten metal in the mold condenses. The present invention can reduce the bubbles in the combustion chamber part of the engine cylinder head and ensure the quality of the engine cylinder head.

Description

Technical Field

[0001] The present invention relates to the technical field of metal casting, and particularly relates to a tilting counter-gravity casting device. Background Art

[0002] Currently, two typical processes are generally adopted in the casting production of engine cylinder heads, namely the low-pressure casting process and the counter-gravity casting process. Among them, the counter-gravity casting process uses a counter-gravity casting device to press molten aluminum upward from below the pouring gate of the mold into the mold. After the molten aluminum cools in the mold, the engine cylinder head can be obtained.

[0003] The existing tilting counter-gravity casting device, such as an electromagnetic-driven tilting counter-gravity casting device disclosed in a Chinese utility model patent with the authorization announcement number CN219561390U, mainly includes a counter-gravity casting mechanism, a first tilting mechanism, a second tilting mechanism, and an electromagnetic drive structure. The first tilting mechanism and the second tilting mechanism are respectively located on the left and right sides of the counter-gravity casting mechanism, and the electromagnetic drive structure is arranged on the front side of the counter-gravity casting mechanism. The electromagnetic drive structure is composed of an electromagnetic drive pump, a molten aluminum holding furnace, and a pressure accumulator heat preservation chamber. One end of the electromagnetic drive pump is connected to the molten aluminum holding furnace, and the other end of the electromagnetic drive pump is connected to the pressure accumulator heat preservation chamber. The counter-gravity casting mechanism is provided with a first pouring gate and a second pouring gate. The pressure accumulator heat preservation chamber is communicated with the first pouring gate and the second pouring gate on the counter-gravity casting mechanism, and the pressure accumulator heat preservation chamber is used to inject molten aluminum into the first pouring gate and the second pouring gate. The first pouring gate and the second pouring gate are butted with the pouring gate of the mold and inject the molten aluminum into the cavity in the mold. The structures of the first tilting mechanism and the second tilting mechanism are the same and are symmetrically arranged on the left and right sides of the counter-gravity casting mechanism. The first tilting mechanism and the second tilting mechanism respectively include a tilting drive structure for tilting the mold by 180°. During operation, the mold is first tilted by 180° in the first tilting mechanism, so that the combustion chamber of the mold faces upward and the pouring gate faces downward. Then, the first tilting mechanism transfers the mold to the counter-gravity casting mechanism. The pouring gates of the mold are respectively hermetically butted with the first pouring gate and the second pouring gate. The electromagnetic drive pump is started, and the pressure accumulator heat preservation chamber receives the molten aluminum injected by the molten aluminum holding furnace. Then, the molten aluminum is pressed through the first pouring gate and the second pouring gate into the cavity in the mold. After the molten aluminum in the mold solidifies, the mold is transferred to the second tilting mechanism. After being tilted by 180° by the second tilting mechanism, the cavity of the mold is cleaned, cores are inserted, and the mold is closed to continue the casting of the next workpiece.

[0004] In the prior art, for the engine cylinder head produced by using an anti-gravity casting device, when the die-casting mechanism of the anti-gravity casting device injects molten aluminum, the pouring gate is downward, the gate of the engine cylinder head is downward, and the combustion chamber is located above the gate. The molten aluminum is pressed upward into the die, which can solve the problem of coarse structure at the position of the combustion chamber where the gate is arranged. However, when the above anti-gravity casting device injects molten aluminum, the combustion chamber of the engine cylinder head is located above the gate, which easily causes bubbles to accumulate at the position of the combustion chamber, reducing the strength of the combustion chamber. Moreover, the combustion chamber of the engine cylinder head is an important part of the whole part. Therefore, it has a great impact on the quality of the whole engine cylinder head. Summary of the Invention

[0005] To overcome the deficiencies of the prior art, the present invention provides a flipping anti-gravity casting device to solve the technical problem in the prior art that bubbles are likely to accumulate at the position of the combustion chamber, reducing the strength of the combustion chamber.

[0006] The flipping anti-gravity casting device of the present invention adopts the following technical solutions:

[0007] A flipping anti-gravity casting device includes an anti-gravity casting mechanism, a flipping mechanism, and an electromagnetic driving structure. The electromagnetic driving structure is located on the front side of the anti-gravity casting mechanism and is used to inject molten metal into the die on the anti-gravity casting mechanism. The flipping mechanism is used to flip the die. The anti-gravity casting mechanism includes a casting mechanism. The casting mechanism includes a limiting cylinder. A rotating shaft is arranged in the limiting cylinder. The rotating shaft is coaxially arranged with the limiting cylinder and can rotate in the limiting cylinder. An installation groove for accommodating the die is arranged on the outer wall of the rotating shaft. A window for the die to be placed into the installation groove is arranged on the upper side of the limiting cylinder. A liquid injection channel is connected to the outer wall of the limiting cylinder. A liquid inlet channel is opened in the rotating shaft. One end of the liquid inlet channel penetrates through the bottom of the installation groove and is used for sealingly docking with the pouring gate of the die in the installation groove. The other end of the liquid inlet channel is communicated with the liquid injection channel. The electromagnetic driving structure injects molten metal into the die through the liquid injection channel and the liquid inlet channel. After the die in the installation groove is filled with the molten metal, the rotating shaft rotates, driving the die to flip 180°, so that the pouring gate of the die faces upward until the molten metal in the die condenses.

[0008] Further, an arc-shaped flow channel is formed between the outer wall of the rotating shaft and the inner wall of the limiting cylinder. A first sealing block is fixed on the inner wall of the limiting cylinder at one end of the arc-shaped flow channel. The first sealing block is in sealed sliding fit with the outer wall of the rotating shaft. A second sealing block is fixed on the outer wall of the rotating shaft. The second sealing block moves in the arc-shaped flow channel as the rotating shaft rotates. One end of the liquid injection channel communicates with one end of the arc-shaped flow channel close to the first sealing block. The end of the liquid inlet channel away from the installation groove is located on the side of the second sealing block facing the first sealing block and communicates with the arc-shaped flow channel. The rotating shaft has a first position and a second position on its rotation path. When the rotating shaft is in the first position, the opening of the installation groove faces upward. The second sealing block is at the position where the arc-shaped flow channel is connected to the liquid injection channel. The end of the liquid inlet channel away from the installation groove communicates with the end of the arc-shaped flow channel close to the first sealing block. The electromagnetic driving structure injects molten metal into the mold through the liquid injection channel and the liquid inlet channel. When the mold is filled, the rotating shaft rotates from the first position to the second position. The second sealing block moves in the arc-shaped flow channel in a direction away from the first sealing block until the rotating shaft rotates 180°. The opening of the installation groove faces downward. The pouring port of the mold in the installation groove faces upward. The second sealing block is at the end of the arc-shaped flow channel away from the first sealing block.

[0009] Further, an air inlet channel is formed in the rotating shaft. The air inlet channel communicates with the liquid inlet channel. The air inlet channel and the liquid inlet channel form a tee structure. The air inlet channel conveys gas to the pouring port of the mold when the rotating shaft is in the second position, so that the molten metal remaining in the liquid inlet channel flows out reversely through the arc-shaped flow channel and the liquid injection channel.

[0010] Further, a one-way valve is provided at the connection position of the air inlet channel and the liquid inlet channel. The one-way valve is used to prevent molten metal from entering the air inlet channel.

[0011] Further, the air inlet channel extends along the axial direction of the rotating shaft. The liquid inlet channel is L-shaped and includes a vertical section and a horizontal section. The vertical section extends along the radial direction of the rotating shaft. One end of the vertical section is connected to one end of the horizontal section. The other end of the vertical section communicates with the bottom of the installation groove. The other end of the horizontal section communicates with the arc-shaped flow channel. The air inlet channel communicates with the connection position of the vertical section and the horizontal section.

[0012] Further, an air inlet pipe is connected to the end of the air inlet channel away from the liquid inlet channel. The air inlet pipe is a bendable pipe. There is a gap between the two axial ends of the rotating shaft and the inner wall of the limiting cylinder. One end of the air inlet pipe extends into this gap and is connected to the end of the air inlet channel away from the liquid inlet channel.

[0013] Further, the casting mechanism includes a support frame. The limiting cylinder is fixed on the support frame in the horizontal direction.

[0014] Further, the support frame includes a top plate, a bottom plate, and vertical plates connected between the top plate and the bottom plate. A plurality of the vertical plates are arranged at equal intervals along the axial direction of the limiting cylinder.

[0015] Further, a heat-insulating layer is wrapped around the periphery of the liquid injection channel.

[0016] Further, two turning mechanisms are provided, namely a first turning mechanism and a second turning mechanism. The first turning mechanism and the second turning mechanism are respectively located on the left and right sides of the counter-gravity casting mechanism.

[0017] The beneficial effect of the present invention is as follows: For a turning counter-gravity casting device of the present invention, by providing a casting mechanism capable of driving the mold to turn 180° in the counter-gravity casting mechanism, after the mold is pressed with molten metal in the posture with the pouring gate facing downwards, the rotating shaft in the casting mechanism drives the mold to turn 180°, so that the pouring gate of the mold faces upwards. During the turning process, the bubbles in the molten metal in the mold gather upwards towards the position of the pouring gate. For the engine cylinder head parts cast, this casting method of the present invention can reduce the bubbles in the combustion chamber part of the engine cylinder head, ensure the strength of the combustion chamber part of the engine cylinder head, and thus ensure the quality of the entire engine cylinder head.

[0018] Further, an arc-shaped flow channel, a first sealing block, and a second sealing block are provided between the rotating shaft and the limiting cylinder. At the same time, an air inlet channel is provided in the rotating shaft. Before and after the rotating shaft drives the mold to turn, the first-position and second-position liquid inlet channels are respectively communicated with different parts of the arc-shaped flow channel, that is, the length of the arc-shaped flow channel connected in series between the liquid inlet channel and the liquid injection channel is changed. When the rotating shaft is in the second position, the air inlet channel conveys gas to the pouring gate of the mold. In this way, not only can the residual molten metal in the liquid inlet channel be pushed out in the reverse direction, but also under the action of air pressure, a negative pressure will be formed at the pouring gate of the mold, thereby promoting the bubbles at the bottom of the mold, that is, in the combustion chamber part of the engine cylinder head, to move upwards towards the position of the pouring gate. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Those skilled in the art should understand that these drawings are not necessarily drawn to scale.

[0020] Figure 1 It is a three-dimensional schematic diagram of an embodiment of a turning counter-gravity casting device of the present invention;

[0021] Figure 2 A three-dimensional schematic diagram of a casting mechanism in an embodiment of an overturning anti-gravity casting device of the present invention;

[0022] Figure 3 A top view of a casting mechanism in an embodiment of an overturning anti-gravity casting device of the present invention;

[0023] Figure 4 is Figure 3 a sectional view taken along line A-A in

[0024] Figure 5 is Figure 3 a sectional view taken along line B-B in

[0025] Figure 6 is Figure 5 another state schematic diagram of

[0026] In the figure: 100, casting platform; 101, walking support; 102, electromagnetic drive structure; 103, overturning mechanism; 104, electric control cabinet; 105, accumulator heat preservation chamber; 200, anti-gravity casting mechanism; 201, support frame; 202, limiting cylinder; 2021, first sealing block; 203, rotating shaft; 2031, second sealing block; 204, air inlet pipe; 2041, air inlet channel; 2042, one-way valve; 205, mold; 2051, cavity; 2052, pouring port; 206, liquid injection port; 207, heat preservation layer; 208, liquid injection channel; 209, arc-shaped flow channel; 210, liquid inlet channel. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] An embodiment of an overturning anti-gravity casting device of the present invention, as shown in Figures 1 to 6As shown, in this embodiment, the tilting counter-gravity casting equipment is dedicated to the production of engine cylinder heads. The engine cylinder head includes a combustion chamber and a pouring port provided on the combustion chamber. The engine cylinder head is an existing part, and its specific structure will not be described in detail. The tilting counter-gravity casting equipment of the present invention includes a casting platform 100. A walking bracket 101 for workers to walk is provided on the casting platform 100. A counter-gravity casting mechanism 200, a tilting mechanism 103, an electromagnetic driving structure 102, and an electric control cabinet 104 are also provided on the casting platform 100. The counter-gravity casting mechanism 200 is used to place the mold 205. The electromagnetic driving structure 102 is located on the front side of the counter-gravity casting mechanism 200 and is used to inject molten metal into the mold 205 located on the counter-gravity casting mechanism 200 through the counter-gravity casting mechanism 200. In this embodiment, the molten metal is aluminum liquid. The tilting mechanism 103 is used to tilt the mold 205. In this embodiment, two tilting mechanisms 103 are provided, namely tilting mechanism one and tilting mechanism two. The tilting mechanism one and the tilting mechanism two are respectively located on the left and right sides of the counter-gravity casting mechanism 200. The electromagnetic driving structure 102 is composed of an electromagnetic driving pump, an aluminum liquid holding furnace, and a pressure accumulator and heat preservation chamber 105. One end of the electromagnetic driving pump is connected to the aluminum liquid holding furnace, and the other end of the electromagnetic driving pump is connected to the pressure accumulator and heat preservation chamber 105. The pressure accumulator and heat preservation chamber 105 is used to inject aluminum liquid into the counter-gravity casting mechanism 200. When the tilting counter-gravity casting equipment is working, the mold 205 is first tilted 180° in the tilting mechanism one, so that the part corresponding to the combustion chamber of the engine cylinder head in the mold 205 faces upward, and the pouring port 2052 of the mold 205 faces downward. Then the tilting mechanism one transfers the mold 205 to the counter-gravity casting mechanism 200, and the mold 205 maintains the posture with the pouring port 2052 facing downward. Then the electromagnetic driving pump is started. The pressure accumulator and heat preservation chamber 105 receives the aluminum liquid injected by the aluminum liquid holding furnace, and then the aluminum liquid is pressed into the mold 205 on the counter-gravity casting mechanism 200. When the aluminum liquid in the mold 205 solidifies, the mold 205 is transferred to the tilting mechanism two, and after being tilted 180° by the tilting mechanism two, the mold cavity is cleaned, cores are set, and the mold is closed to continue the casting of the next workpiece. It should be noted here that the improvement point of the present invention lies in the counter-gravity casting mechanism 200, while the casting platform 100, the tilting mechanism 103, and the electromagnetic driving structure 102 are all existing known structures and have no close relationship with the improvement of the present invention, so they will not be described in detail here.

[0029] In the present invention, the anti-gravity casting mechanism 200 includes a casting mechanism. The casting mechanism includes a support frame 201 and a limiting cylinder 202 fixed on the support frame 201 in the horizontal direction. A rotating shaft 203 is arranged in the limiting cylinder 202. The rotating shaft 203 is coaxially arranged with the limiting cylinder 202, and both ends of the rotating shaft 203 are respectively rotatably supported at both ends of the limiting cylinder 202, so that the rotating shaft 203 can rotate in the limiting cylinder 202. In this embodiment, one end of the rotating shaft 203 is connected to a rotation driving mechanism (not shown in the figure), and the rotation driving mechanism is used to drive the rotating shaft 203 to rotate. An installation groove for accommodating the mold 205 is provided on the outer wall of the rotating shaft 203. A window for allowing the mold 205 to be placed into the installation groove is provided on the upper side of the limiting cylinder 202. After the mold 205 is loaded into the installation groove, the rotating shaft 203 rotates to drive the mold 205 in the installation groove to flip. In the present invention, the shape of the mold 205 is a cube shape at the bottom adapted to the installation groove and a circular arc surface at the top adapted to the inner wall of the limiting cylinder 202.

[0030] A liquid injection channel 208 is connected to the outer wall of the limiting cylinder 202. One end of the liquid injection channel 208 forms a liquid injection port 206, and the liquid injection port 206 is communicated with the pressure accumulator heat preservation chamber 105 to receive the molten aluminum in the pressure accumulator heat preservation chamber 105. A liquid inlet channel 210 is opened in the rotating shaft 203. One end of the liquid inlet channel 210 penetrates through the bottom of the installation groove and forms a gate of the anti-gravity casting mechanism 200 for sealingly docking with the pouring port 2052 of the mold 205 in the installation groove. The other end of the liquid inlet channel 210 is communicated with the liquid injection channel 208. During operation, the electromagnetic driving structure 102 injects molten aluminum into the cavity 2051 of the mold 205 through the liquid injection channel 208 and the liquid inlet channel 210. After the mold 205 in the installation groove is filled, the rotating shaft 203 rotates, driving the mold 205 to flip 180°, so that the pouring port 2052 of the mold 205 faces upward until the molten metal in the mold 205 solidifies. Through the rotation of the rotating shaft 203, the present invention flips the mold 205 by 180° after the mold 205 is filled and before the molten aluminum in the mold 205 solidifies, so that the combustion chamber of the engine cylinder head is located below. During the flipping process, it is beneficial for the air holes at the position of the combustion chamber of the engine cylinder head to move upward and discharge from the pouring port 2052 of the mold 205, thus ensuring the strength of the combustion chamber of the engine cylinder head and further ensuring the quality of the entire engine cylinder head.

[0031] In this embodiment, an arc-shaped flow channel 209 is formed between the outer wall of the rotating shaft 203 and the inner wall of the limiting cylinder 202. A first sealing block 2021 is fixed at one end of the arc-shaped flow channel 209 on the inner wall of the limiting cylinder 202. The first sealing block 2021 is in sealing sliding fit with the outer wall of the rotating shaft 203. A second sealing block 2031 is fixed on the outer wall of the rotating shaft 203. The second sealing block 2031 moves in the arc-shaped flow channel 209 as the rotating shaft 203 rotates. One end of the liquid injection channel 208 communicates with one end of the arc-shaped flow channel 209 close to the first sealing block 2021. The end of the liquid inlet channel 210 away from the installation groove is located on the side of the second sealing block 2031 facing the first sealing block 2021 and communicates with the arc-shaped flow channel 209. The rotating shaft 203 has a first position and a second position on the rotation path. When the rotating shaft 203 is in the first position, as shown in Figure 5 shown, the opening of the installation groove faces upward. The second sealing block 2031 is at the position where the arc-shaped flow channel 209 is connected to the liquid injection channel 208. The end of the liquid inlet channel 210 away from the installation groove communicates with one end of the arc-shaped flow channel 209 close to the first sealing block 2021. The electromagnetic driving structure 102 injects molten metal into the mold 205 through the liquid injection channel 208 and the liquid inlet channel 210. After the mold 205 is filled, the rotating shaft 203 rotates from the first position to the second position. The second sealing block 2031 moves in the arc-shaped flow channel 209 in a direction away from the first sealing block 2021 until the rotating shaft 203 rotates 180°. At this time, as shown in Figure 6 shown, the opening of the installation groove faces downward. The pouring port 2052 of the mold 205 in the installation groove faces upward. The second sealing block 2031 is at the end of the arc-shaped flow channel 209 away from the first sealing block 2021.

[0032] In this embodiment, an air intake passage 2041 is formed in the rotating shaft 203. The air intake passage 2041 is communicated with a liquid inlet passage 210. The air intake passage 2041 and the liquid inlet passage 210 form a tee structure. One end of the air intake passage 2041 far from the liquid inlet passage 210 is connected with an air inlet pipe 204. The air inlet pipe 204 is a bent pipe that can be bent and deformed. There is a gap between the axial two ends of the rotating shaft 203 and the inner wall of the limiting cylinder 202. One end of the air inlet pipe 204 extends into this gap and is connected with the end of the air intake passage 2041 far from the liquid inlet passage 210. The other end of the air inlet pipe 204 is connected with an air pump (not shown in the figure). When the rotating shaft 203 is in the second position, the air pump conveys gas to the pouring port 2052 of the mold 205 through the air intake passage 2041, so that the residual molten metal in the liquid inlet passage 210 flows out reversely through the arc-shaped flow passage 209 and the liquid injection passage 208. When the air intake passage 2041 conveys gas to the pouring port 2052 of the mold 205, the electromagnetic driving structure 102 has stopped injecting aluminum liquid into the mold 205. Under the action of air pressure, it will push the residual aluminum liquid in the liquid inlet passage 210 out reversely, preventing the aluminum liquid from solidifying in the liquid inlet passage 210 and the arc-shaped flow passage 209. At the same time, under the action of air pressure, a negative pressure will be formed at the position of the pouring port 2052 of the mold 205, which can promote the upward movement of bubbles at the combustion chamber position of the engine cylinder head.

[0033] In this embodiment, a one-way valve 2042 is provided at the connection position of the air intake passage 2041 and the liquid inlet passage 210. The one-way valve 2042 can allow gas to enter the liquid inlet passage 210 and can prevent aluminum liquid from entering the air intake passage 2041.

[0034] In this embodiment, the air intake passage 2041 extends along the axial direction of the rotating shaft 203. The liquid inlet passage 210 is L-shaped and includes a vertical section and a horizontal section. The vertical section extends along the radial direction of the rotating shaft 203. One end of the vertical section is connected with one end of the horizontal section. The other end of the vertical section is communicated with the bottom of the installation groove. The other end of the horizontal section is communicated with the arc-shaped flow passage 209. The air intake passage 2041 is communicated with the connection positions of the vertical section and the horizontal section.

[0035] In this embodiment, the support frame 201 includes a top plate, a bottom plate and a vertical plate connected between the top plate and the bottom plate. A plurality of vertical plates are arranged at equal intervals along the axial direction of the limiting cylinder 202, thus ensuring the stability of the limiting cylinder 202. In this embodiment, in order to reduce the temperature loss of the aluminum liquid, a heat insulation layer 207 is wrapped around the periphery of the liquid injection passage 208.

[0036] When the flip anti-gravity casting equipment of the present invention is working, the staff installs the mold 205 on the first flipping mechanism. The first flipping mechanism flips the mold 205 by 180°, making the pouring port 2052 of the mold 205 face downward. Then the first flipping mechanism transfers the mold 205 to the installation groove of the anti-gravity casting mechanism 200, and the mold 205 maintains the posture with the pouring port 2052 downward, as Figure 5 shown in the state. At this time, the rotating shaft 203 is in the first position, and the second sealing block 2031 is at the position where the arc-shaped flow channel 209 is connected to the liquid injection channel 208. The opening of the installation groove faces upward, and the pouring port 2052 of the mold 205 faces downward and is hermetically docked with the gate on the bottom of the installation groove. The end of the liquid inlet channel 210 away from the installation groove is communicated with the end of the arc-shaped flow channel 209 close to the first sealing block 2021. Then the electromagnetic drive pump is started. The pressure storage and heat preservation chamber 105 receives the molten aluminum injected from the aluminum holding furnace. Then the molten aluminum is pressured and enters the mold 205 through the liquid injection channel 208 and the liquid inlet channel 210. When the mold 205 is filled, that is, when the cavity 2051 is filled with molten aluminum, the electromagnetic drive structure 102 stops injecting molten aluminum into the mold 205. The rotary drive mechanism drives the rotating shaft 203 to rotate from the first position to the second position. The second sealing block 2031 moves in the arc-shaped flow channel 209 in the direction away from the first sealing block 2021 until the rotating shaft 203 rotates 180°. At this time, as Figure 6 shown, the rotating shaft 203 drives the mold 205 in the installation groove to flip 180°, so that the opening of the installation groove faces downward, the pouring port 2052 of the mold 205 in the installation groove faces upward, and the second sealing block 2031 is at the end of the arc-shaped flow channel 209 away from the first sealing block 2021. Since the mold 205 has flipped 180°, under the action of gravity, the bubbles in the combustion chamber part of the engine cylinder head will be squeezed upward and discharged. Then the air pump is started to deliver gas to the pouring port 2052 of the mold 205 through the air inlet pipe 204 and the air inlet channel 2041. Under the action of air pressure, the remaining molten aluminum in the liquid inlet channel 210 will be pushed out in the reverse direction to prevent the molten aluminum from solidifying in the liquid inlet channel 210 and the arc-shaped flow channel 209. At the same time, under the action of air pressure, a negative pressure will be formed at the position of the pouring port 2052 of the mold 205, which can promote the upward movement of the bubbles at the combustion chamber position of the engine cylinder head. After the molten aluminum in the mold 205 solidifies, the mold 205 is transferred to the second flipping mechanism. After the second flipping mechanism flips the mold 205 by 180°, the cavity 2051 of the mold 205 is cleaned, cores are set, and the mold is closed to continue the casting of the next engine cylinder head.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flipping anti-gravity casting device, comprising an anti-gravity casting mechanism (200), a flipping mechanism (103), and an electromagnetic drive structure (102), wherein the electromagnetic drive structure (102) is located at the front side of the anti-gravity casting mechanism (200) and is used to pressurize molten metal into a mold (205) located on the anti-gravity casting mechanism (200), and the flipping mechanism (103) is used to flip the mold (205), characterized in that: The anti-gravity casting mechanism (200) comprises a casting mechanism, the casting mechanism comprising a limiting cylinder (202), a rotating shaft (203) being arranged in the limiting cylinder (202), the rotating shaft (203) being coaxially arranged with the limiting cylinder (202) and being rotatable in the limiting cylinder (202), a mounting groove for accommodating a mold (205) being provided on the outer wall of the rotating shaft (203), a window for allowing the mold (205) to be placed in the mounting groove being provided on the upper side of the limiting cylinder (202), a liquid injection channel (208) being connected to the outer wall of the limiting cylinder (202), and a liquid inlet channel (210) being provided in the rotating shaft (203), One end of the liquid inlet channel (210) passes through the bottom of the mounting groove and is used to seal and dock with the pouring port (2052) of the mold (205) in the mounting groove; the other end of the liquid inlet channel (210) is in communication with the liquid injection channel (208); the electromagnetic drive structure (102) presses the metal liquid into the mold (205) through the liquid injection channel (208) and the liquid inlet channel (210); the rotating shaft (203) rotates after the mold (205) in the mounting groove is filled, driving the mold (205) to flip 180 degrees, so that the pouring port (2052) of the mold (205) faces upward until the metal liquid in the mold (205) condenses;An arcuate flow channel (209) is formed between the outer wall of the rotating shaft (203) and the inner wall of the limiting cylinder (202); a first sealing block (2021) is fixed on the inner wall of the limiting cylinder (202) at one end of the arcuate flow channel (209); the first sealing block (2021) is in sealing and sliding cooperation with the outer wall of the rotating shaft (203); a second sealing block (2031) is fixed on the outer wall of the rotating shaft (203); the second sealing block (2031) is moved along with the rotating shaft (2 03) rotates and moves in the arc flow channel (209), one end of the injection channel (208) is connected to an end of the arc flow channel (209) close to the first sealing block (2021), the end of the liquid inlet channel (210) away from the mounting groove is located on the side of the second sealing block (2031) facing the first sealing block (2021), and is connected to the arc flow channel (209), the rotating shaft (203) has a first position and a second position on the rotating path, when the rotating shaft (203) is in the first position, When the first sealing block (2021) is in the position, the opening of the mounting groove faces upward, the second sealing block (2031) is located at the position where the arc-shaped flow channel (209) is connected to the injection channel (208), the end of the inlet channel (210) away from the mounting groove is connected to the end of the arc-shaped flow channel (209) close to the first sealing block (221), and the electromagnetic drive structure (102) injects metal liquid into the mold (205) through the injection channel (208) and the inlet channel (210). When the mold (205) is filled, Afterwards, the rotating shaft (203) rotates from the first position to the second position, and the second sealing block (2031) moves in the arc-shaped flow channel (209) in a direction away from the first sealing block (2021), until the rotating shaft (203) rotates 180°, the opening of the installation groove faces downward, the pouring port (2052) of the mold (205) in the installation groove faces upward, and the second sealing block (2031) is located at the end of the arc-shaped flow channel (209) away from the first sealing block (2021). ; 2. The inversion anti-gravity casting equipment according to claim 1 is characterized in that: An air inlet channel (2041) is provided in the rotating shaft (203), the air inlet channel (2041) is communicated with the liquid inlet channel (210), the air inlet channel (2041) and the liquid inlet channel (210) form a three-way structure, and the air inlet channel (2041) delivers gas to the pouring port (2052) of the mold (205) when the rotating shaft (203) is in the second position, so that the metal liquid remaining in the liquid inlet channel (210) flows out in the opposite direction through the arc-shaped flow channel (209) and the injection channel (208).

3. The inversion anti-gravity casting equipment according to claim 2 is characterized in that: A one-way valve (2042) is provided at the position where the air inlet channel (2041) and the liquid inlet channel (210) are connected, and the one-way valve (2042) is used to prevent the metal liquid from entering the air inlet channel (2041).

4. The inversion anti-gravity casting equipment according to claim 3 is characterized in that: The air inlet channel (2041) extends along the axial direction of the rotating shaft (203); the liquid inlet channel (210) is L-shaped and comprises a vertical section and a horizontal section; the vertical section extends along the radial direction of the rotating shaft (203); one end of the vertical section is connected to one end of the horizontal section; the other end of the vertical section is connected to the bottom of the mounting groove; the other end of the horizontal section is connected to the arc-shaped flow channel (209); and the air inlet channel (2041) is connected to the connection position between the vertical section and the horizontal section.

5. The inversion anti-gravity casting equipment according to claim 4 is characterized in that: An end of the air inlet channel (2041) away from the liquid inlet channel (210) is connected to an air inlet pipe (204); the air inlet pipe (204) is a curved pipe that can be bent and deformed; a gap is provided between the axial ends of the rotating shaft (203) and the inner wall of the limiting cylinder (202); one end of the air inlet pipe (204) extends into the gap and is connected to an end of the air inlet channel (2041) away from the liquid inlet channel (210).

6. The inversion anti-gravity casting equipment according to any one of claims 1 to 5, characterized in that: The casting mechanism comprises a support frame (201), and the limiting cylinder (202) is fixed on the support frame (201) in a horizontal direction.

7. The inversion anti-gravity casting equipment according to claim 6, characterized in that: The support frame (201) comprises a top plate, a bottom plate and a vertical plate connected between the top plate and the bottom plate, and a plurality of vertical plates are evenly spaced and arranged along the axial direction of the limiting cylinder (202).

8. The inversion anti-gravity casting equipment according to any one of claims 1 to 5, characterized in that: The periphery of the liquid injection channel (208) is coated with a thermal insulation layer (207).

9. The inversion anti-gravity casting equipment according to any one of claims 1 to 5, characterized in that: The flipping mechanisms (103) are provided in two parts, namely flipping mechanism 1 and flipping mechanism 2. The flipping mechanism 1 and flipping mechanism 2 are respectively located on the left and right sides of the anti-gravity casting mechanism (200).

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