A semi-automatic casting machine

Abstract

The application relates to the casting technical field and discloses a semi-automatic casting machine which comprises a casting mold guide rail, two transfer slide rails are fixedly connected to the lower side of the rear end of the casting mold guide rail, a transfer plate chain is fixedly connected to the rear end of the two transfer slide rails, liquid for casting is filled through an electric furnace, the liquid for casting is transferred through the transfer plate chain and a transfer ladle, the liquid for casting is transported to a position for casting a casting piece through the transfer slide rails and sliding clamping plates, finally, the liquid for casting in the transfer ladle is directly cast into the casting mold through the limiting and rotation of a rotating plate and a butt joint plate, the transfer ladle which has finished casting the liquid for casting can be transported back to the rear end of the transfer plate chain through a hoisting frame and a hoisting mechanism to be recycled and filled, the liquid for casting can be directly cast through the transfer ladle without being poured back and forth, and the transfer and casting of the liquid for casting can be continuously carried out, so that the heat loss of the liquid for casting is reduced, the production efficiency is improved, the casting procedure is reduced, the labor cost can be effectively saved, and the labor intensity is reduced.

Description

Technical Field

[0001] This invention belongs to the field of casting technology, specifically a semi-automatic casting machine. Background Technology

[0002] Casting is a method of producing parts or blanks by pouring liquid metal into a mold cavity and allowing it to cool and solidify. The mold is generally made of sand, metal, or ceramic. The method used will vary depending on the metal and the mold. However, the existing casting method involves using an aerial hoisting device and a transfer bag to transport the molten metal to the casting location, then pouring the molten metal from the transfer bag into the casting bag for casting. The aerial hoisting device then returns the transfer bag for refilling. This casting method not only causes heat loss during the pouring but also reduces the efficiency of the molten metal circulation, resulting in low casting efficiency. Furthermore, this casting method involves many steps, leading to high labor costs and high labor intensity, making it difficult to adapt to the current production pace. Summary of the Invention

[0003] The purpose of this invention is to provide a semi-automatic casting machine to solve the problems mentioned in the background art, which involve transferring and casting the casting liquid separately through a transfer ladle and a casting ladle. This not only causes heat loss of the casting liquid but also reduces casting efficiency and increases labor costs and labor intensity.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a semi-automatic casting machine, comprising a mold guide rail, two transfer slide rails fixedly connected to the lower rear end of the mold guide rail, a transfer plate chain fixedly connected to the rear end of the two transfer slide rails, a sliding plate slidably connected to the upper end of each of the two transfer slide rails, a support limiting post fixedly connected to the front upper end of each of the two sliding plate blocks, a limiting plate fixedly connected to the front end of the two support limiting posts, a rotating plate rotatably connected to the rear end of the two support limiting posts, limiting blocks fixedly connected to the left and right sides of the upper end of the rotating plate, a docking plate fixedly connected to the lower end of the rotating plate, multiple conveying rollers rotatably connected inside the docking plate, and multiple transfer bags provided at the upper end of the transfer plate chain, and the docking plate... The internal structure includes a transfer bag located on top of multiple conveyor rollers. Connecting blocks are rotatably connected to the rear sides of both ends of the docking plate via locking pins. A hoisting frame is fixedly connected to the rear end of the casting guide rail, and is located outside the upper side of the transfer slide rail and transfer plate chain. The hoisting frame consists of support columns at the front and rear ends and a slide rail rod in the middle. A lifting rod is fixedly connected to the left rear end of the support column at the front. A reducer is fixedly connected to the rear lower end of the lifting rod, and the reducer is connected to the connecting block via a chain. A hoisting mechanism is slidably connected to the outside of the slide rail rod. An electric furnace is located at the rear right end of the transfer plate chain. A control button is located between the transfer plate chain and the sliding plate, and is connected to the inner left front end of the transfer plate chain and protrudes outside the transfer plate chain.

[0005] Preferably, the transfer slide rail and the sliding plate are engaged with each other through a limiting slot and a limiting claw, and slide with each other through multiple rollers, with the multiple rollers rotatably connected inside the lower end of the sliding plate.

[0006] Preferably, the supporting limiting column and the rotating plate are rotatably connected by two rotating seats and two rotating pins, and the two rotating seats are respectively fixedly connected to the upper rear side of the two supporting limiting columns, and the two rotating pins are respectively fixedly connected to the upper side of the left and right ends of the rotating plate.

[0007] Preferably, the two limiting blocks are respectively fixedly connected to the upper ends of the two rotating pins of the rotating plate, and wrapped around the outside of the rotating seat on the rear side of the upper end of the supporting limiting column, and can fit against the outer wall of the front side of the upper end of the supporting limiting column when the rotating plate rotates to ninety degrees.

[0008] Preferably, the upper ends of the plurality of conveying rollers are flush with the upper ends of the plurality of rollers inside the transfer plate chain. The rotating plate and the docking plate can be flipped by the pull of the connecting block through the reducer and the chain, and the transfer bag on the upper end of the docking plate will also be flipped.

[0009] Preferably, the control button can control the operation of the transfer plate chain by squeezing and separating the sliding plate. The hoisting mechanism consists of a winding transfer machine and a chain hook, and can transfer the transfer bag through the chain hook. The transfer bag can be filled with casting liquid through the electric furnace.

[0010] Preferably, a lifting groove is provided inside the front side of the upper center of the limiting plate, and a gear groove is connected inside the upper rear side of the lifting groove. A lifting rod is slidably connected inside the lifting groove. A casting head with an upward opening is fixedly connected to the upper end of the lifting rod, and a casting port is provided at the center of the front end of the casting head. A rack groove is provided inside the rear end of the lifting rod, and a lifting gear is slidably connected to the rear end of the rack groove. A gear connecting rod passes through the connecting block from left to right, and the left end of the gear connecting rod passes through the outside of the left side support limiting post. A lifting turntable is fixedly connected to the left end of the gear connecting rod, and a limiting bolt is threaded inside the outer side of the left end of the lifting turntable.

[0011] Preferably, the rack groove and the lifting gear mesh with each other, and the lifting turntable can drive the lifting gear to rotate at the rear end of the rack groove through the gear connecting rod, and cause the lifting rod and the casting head to move up and down.

[0012] Preferably, the casting head is composed of a quadrilateral frame at the rear end and a triangular frame at the front end, and the outer wall of the quadrilateral frame is in contact with the supporting and limiting posts on both sides and the rotating plate on the rear side, and the casting port at the front end of the casting head is located at the corner of the triangular frame.

[0013] Preferably, the upper outer wall of the casting head is always located below the upper outer wall of the support limiting column, and the lower end of the rack groove is located inside the lifting rod.

[0014] The beneficial effects of this invention are as follows:

[0015] 1. This invention uses an electric furnace to fill the casting liquid, a transfer plate chain and transfer bag to transfer the casting liquid, a transfer slide rail and sliding plate to transport the casting liquid to the casting position, and finally, the casting liquid inside the transfer bag is directly poured into the mold by the limiting and rotation of the rotating plate and docking plate. The transfer bag after casting liquid is poured can be transported back to the rear end of the transfer plate chain by the hoisting frame and hoisting mechanism for recycling. This allows the casting liquid to be directly poured through the transfer bag without the need for transfer, and the transfer and pouring of the casting liquid can be continuously carried out. This reduces the heat loss of the casting liquid, improves production efficiency, and reduces the number of casting steps, effectively saving labor costs and reducing labor intensity.

[0016] 2. This invention provides a casting head that can be raised and lowered at the front end of a rotating plate, and a transfer slide rail and a sliding plate that can slide back and forth at the lower end of the casting head. This allows the casting port at the front end of the casting head to be positioned by raising and lowering and sliding back and forth. This enables the casting port to be positioned according to the opening position of the sand mold and the casting mold, allowing the casting machine to adapt to different types of casting and improving its applicability.

[0017] 3. This invention sets up a transfer plate chain on the ground and sets up a hoisting frame and hoisting mechanism on the upper side of the transfer plate chain, so that the transfer bag filled with casting liquid can be transferred smoothly through the transfer plate chain. After the casting liquid is poured, the transfer bag can be transported back through the hoisting frame and hoisting mechanism for cyclic filling and casting. This can effectively avoid the risk of tipping caused by single aerial hoisting and improve the operating efficiency of the transfer bag. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the casting machine of the present invention;

[0019] Figure 2 This is a schematic diagram of the casting machine of the present invention from the left side.

[0020] Figure 3 This is a schematic diagram of the rotating plate connection structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the limiting plate connection structure of the present invention;

[0022] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0023] Figure 6This is a schematic diagram of the lifting rod connection structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the transfer plate chain connection structure of the present invention;

[0025] Figure 8 For the present invention Figure 7 Enlarged diagram of point B in the middle.

[0026] In the diagram: 1. Casting mold guide rail; 2. Transfer slide rail; 3. Transfer plate chain; 4. Sliding clamping plate; 5. Support limit post; 6. Limiting plate; 7. Rotating plate; 8. Limiting block; 9. Connecting plate; 10. Transfer bag; 11. Conveyor roller; 12. Connecting block; 13. Hoisting frame; 14. Lifting rod; 15. Reducer; 16. Lifting slide; 17. Gear groove; 18. Lifting rod; 19. Casting head; 20. Rack groove; 21. Lifting gear; 22. Gear connecting rod; 23. Lifting turntable; 24. Limiting bolt; 25. Hoisting mechanism; 26. Electric furnace; 27. Control button. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figures 1 to 8As shown, this embodiment of the invention provides a semi-automatic casting machine, including a mold guide rail 1. Two transfer slide rails 2 are fixedly connected to the lower rear end of the mold guide rail 1. Transfer plate chains 3 are fixedly connected to the rear ends of the two transfer slide rails 2. Sliding clamping plates 4 are slidably connected to the upper ends of both transfer slide rails 2. The casting liquid is transported to the casting position via the transfer slide rails 2 and sliding clamping plates 4, and the front-to-back distance between the casting head 19 and the mold opening can be controlled. Supporting limiting posts 5 are fixedly connected to the front ends of the upper ends of the two sliding clamping plates 4. A limiting plate 6 is fixedly connected between the front ends of the two supporting limiting posts 5 for... The rotating plate 7 and the docking plate 9 are supported and restricted in their positions. A rotating plate 7 is rotatably connected between the two supporting and limiting columns 5 on its rear side. Limiting blocks 8 are fixedly connected to the left and right sides of the upper end of the rotating plate 7, and a docking plate 9 is fixedly connected to the lower end of the rotating plate 7. The rotating plate 7 and the docking plate 9 lift and flip the transfer bag 10, allowing the casting liquid inside the transfer bag 10 to be poured and cast. Multiple conveying rollers 11 are rotatably connected inside the docking plate 9, conveying the transfer bag 10 to the upper end of the docking plate 9. Multiple transfer bags 10 are arranged on the upper end of the transfer plate chain 3, and the docking plate 9 contains... The unit is equipped with a transfer bag 10, located on the upper end of multiple conveyor rollers 11, for the movement of the casting liquid. Connecting blocks 12 are rotatably connected to the rear sides of both ends of the docking plate 9 via locking pins. A hoisting frame 13 is fixedly connected to the rear end of the mold guide rail 1, and the hoisting frame 13 is located on the upper outer side of the transfer slide rail 2 and the transfer plate chain 3. The hoisting frame 13 consists of support columns at the front and rear ends and a slide rail rod in the middle. A lifting rod 14 is fixedly connected to the left rear end of the support column on the front side. A reducer 15 is fixedly connected to the rear side of the lower end of the lifting rod 14, and the reducer 15 is connected to the connecting blocks 12 via a chain. 15 The rotating plate 7 and the docking plate 9 are lifted and flipped by the chain and connecting block 12. The slide rail is slidably connected to the outside of the hoisting mechanism 25. The hoisting mechanism 25 is used to return the cast transfer bag 10, so that the transfer bag 10 can be cyclically filled, transferred and cast. An electric furnace 26 is set on the rear right side of the transfer plate chain 3 for filling the casting liquid. A control button 27 is set between the transfer plate chain 3 and the sliding plate 4. The control button 27 is connected to the inside of the front left side of the transfer plate chain 3 and protrudes from the outside of the transfer plate chain 3. The operation and stop of the transfer plate chain 3 are controlled by the control button 27.

[0029] The transfer slide rail 2 and the sliding plate 4 are engaged with each other through a limiting slot and a limiting claw, making the connection between the transfer slide rail 2 and the sliding plate 4 more stable and preventing slippage. They also slide with each other through multiple rollers, and the multiple rollers are rotatably connected inside the lower end of the sliding plate 4, reducing the frictional resistance between the transfer slide rail 2 and the sliding plate 4.

[0030] The supporting limiting column 5 and the rotating plate 7 are rotatably connected by two rotating seats and two rotating pins. The two rotating seats are fixedly connected to the upper rear side of the two supporting limiting columns 5, and the two rotating pins are fixedly connected to the upper side of the left and right ends of the rotating plate 7, so that the upper port of the transfer bag 10 can be rotated just above the casting head 19 to prevent the casting liquid from spilling.

[0031] Among them, the two limiting blocks 8 are respectively fixedly connected to the upper ends of the two rotating pins of the rotating plate 7, and wrapped around the rotating seat on the rear side of the upper end of the supporting limiting column 5. When the rotating plate 7 rotates to ninety degrees, it can fit against the upper front outer wall of the supporting limiting column 5 to limit the rotation position of the rotating plate 7 and the docking plate 9, so that the rear outer wall of the rotating plate 7 can only rotate to the horizontal position, preventing the transfer bag 10 from slipping out of the rotating plate 7 and the docking plate 9, while ensuring that the casting liquid inside the transfer bag 10 can flow out completely.

[0032] The upper ends of multiple conveying rollers 11 are flush with the upper ends of multiple rollers inside the transfer plate chain 3, so that the transfer bag 10 can be transferred more smoothly between the transfer plate chain 3 and the docking plate 9. The rotating plate 7 and the docking plate 9 can be flipped by the pull of the connecting block 12 through the reducer 15 and the chain, and drive the transfer bag 10 on the upper end of the docking plate 9 to flip together, which makes it easier to control the casting of the casting liquid.

[0033] Among them, the control button 27 can control the operation of the transfer plate chain 3 by squeezing and separating the sliding plate 4, so that the transfer plate chain 3 can transfer the transfer package 10 when it is in contact with the sliding plate 4, and stop the transfer of the transfer package 10 when the transfer plate chain 3 is separated from the sliding plate 4 to prevent the transfer package 10 from falling off the front end of the transfer plate chain 3. The hoisting mechanism 25 consists of a winding transfer machine and a chain hook, and can transfer the transfer package 10 through the chain hook. The transfer package 10 can be filled with casting liquid through the electric furnace 26, making it easier for the hoisting mechanism 25 to hoist the transfer package 10.

[0034] The upper center of the limiting plate 6 has a lifting groove 16 inside the front side, and the upper rear end of the lifting groove 16 is connected to a gear groove 17. A lifting rod 18 is slidably connected inside the lifting groove 16. The lifting rod 18 controls the lifting of the casting head 19 by sliding up and down, and can control the vertical distance between the casting head 19 and the mold opening. The upper end of the lifting rod 18 is fixedly connected to the casting head 19 with the opening facing upward, and the casting head 19 has a casting port at the center of its front end for casting liquid. A rack groove 20 is opened inside the rear end of the lifting rod 18, and the rear end of the rack groove 20 is slidably connected to... There is a lifting gear 21, which controls the up and down sliding of the lifting rod 18 by meshing and rolling with the rack groove 20 and the lifting gear 21. The connecting block 12 has a gear connecting rod 22 running through it on the left and right sides, and the left end of the gear connecting rod 22 passes through the outside of the left side support limit post 5. The left end of the gear connecting rod 22 is fixedly connected to the lifting turntable 23. The rotation of the lifting gear 21 is controlled by rotating the lifting turntable 23. The left side of the lifting turntable 23 is connected to the inner thread of the limit bolt 24, so that the limit bolt 24 is tightened to fit with the support limit post 5, thereby fixing the position of the lifting turntable 23.

[0035] Among them, the rack groove 20 and the lifting gear 21 mesh with each other, and the lifting turntable 23 can drive the lifting gear 21 to rotate at the rear end of the rack groove 20 through the gear connecting rod 22, and cause the lifting rod 18 and the casting head 19 to move up and down. The lifting and lowering of the casting head 19 is controlled by rotating the lifting turntable 23.

[0036] The casting head 19 consists of a quadrilateral frame at the rear end and a triangular frame at the front end. The outer wall of the quadrilateral frame is in contact with the support and limiting posts 5 on both sides and the rotating plate 7 on the rear side. The casting port at the front end of the casting head 19 is located at the corner of the triangular frame, which can prevent the casting liquid from spilling and allow the casting liquid to converge at the casting port.

[0037] The upper outer wall of the casting head 19 is always located below the upper outer wall of the support limiting column 5, ensuring that the casting head 19 is always below the upper opening of the transfer bag 10. The lower end of the rack groove 20 is located inside the lifting rod 18, ensuring that the lifting gear 21 cannot roll out of the rack groove 20, preventing the lifting rod 18 from sliding out completely from the lifting slide 16, and avoiding the lifting rod 18 and the casting head 19 from falling off.

[0038] The working principle is as follows:

[0039] Turn on the power and push the sliding plate 4 to engage with the transfer plate chain 3, so that the docking plate 9 engages with the transfer plate chain 3. At this time, the sliding plate 4 presses the control button 27 to start the transfer plate chain 3. Multiple transfer bags 10 are circulated and transported at the upper end of the transfer plate chain 3 by the hoist 25. The transfer bags 10 are conveyed from back to front at the upper end of the transfer plate chain 3 and are filled with casting liquid at the electric furnace 26. When the foremost transfer bag 10 is conveyed to the upper end of the docking plate 9 and is tightly engaged with the rotating plate 7, the transfer bag 10 with its rear end close to it continues to move forward under the action of the transfer plate chain 3 and pushes the transfer bag 10 located at the upper end of the docking plate 9, causing the sliding plate 4 and the docking plate 9 to slide forward and separate from the transfer plate chain 3. The sliding plate 4 no longer presses the control button 27, so the transfer plate chain 3 stops operating. Then, the transfer is carried out by the transfer slide rail 2 and the sliding plate chain 3. The moving plate 4 pushes the rotating plate 7 and the docking plate 9 forward, and controls the casting position by the forward and backward sliding distance of the sliding plate 4 and the up and down lifting of the casting head 19. Then, the rotating plate 7 and the docking plate 9 are lifted and flipped by the connecting block 12 and the reducer 15, so that the casting liquid inside the transfer bag 10 flows into the casting head 19, and is then poured into the mold opening through the casting port at the front end of the casting head 19. When the casting liquid fills the mold, the operation of the reducer 15 is stopped, and the mold guide rail 1 moves forward by one mold length, and casting is performed again. After the casting liquid inside the transfer bag 10 is poured out, the transfer bag 10 is lifted back to the rear end of the transfer plate chain 3 by the hoisting mechanism 25 for cyclic filling. The docking plate 9 is pushed again to fit with the transfer plate chain 3 by the sliding plate 4. The above operation is repeated to achieve uninterrupted cyclic casting.

[0040] In this process, after the transfer bag 10 is filled with casting liquid, it is moved to the upper end of the docking plate 9 by the transfer plate chain 3. Then, the transfer bag 10 is moved to the position of casting by the transfer slide rail 2 and the sliding plate 4. Then, the transfer bag 10 is flipped by the reducer 15 so that the casting liquid flows out for direct casting. There is no need to transfer and cast through the casting bag, which avoids heat loss during the transfer process and reduces the casting process. The casting bag 10 is returned by the hoisting mechanism 25 after casting, so that casting can continue and thus improve the casting efficiency.

[0041] In addition, the distance between the casting port at the front end of the casting head 19 and the mold opening can be controlled by the sliding plate 4 sliding back and forth on the upper end of the transfer slide rail 2 and by the up and down movement of the casting head 19. This allows the casting machine to cast different types of sand molds and mold openings at different positions, making it easier to control, more adaptable, and improving the adaptability and applicability of the casting machine.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A semi-automatic casting machine, characterized in that, The system includes a mold guide rail (1), with two transfer slide rails (2) fixedly connected to the lower rear end of the mold guide rail (1). A transfer plate chain (3) is fixedly connected to the rear end of the two transfer slide rails (2). A sliding plate (4) is slidably connected to the upper end of each of the two transfer slide rails (2). A support limiting post (5) is fixedly connected to the front of the upper end of each of the two sliding plate (4). A limiting plate (6) is fixedly connected to the front of the two support limiting posts (5). A rotating plate (7) is rotatably connected to the rear of the two support limiting posts (5). Limit blocks (8) are fixedly connected to the left and right sides of the upper end of the rotating plate (7). A docking plate (9) is fixedly connected to the lower end of the rotating plate (7). Multiple transfer rollers (11) are rotatably connected inside the docking plate (9). Multiple transfer bags (10) are provided at the upper end of the transfer plate chain (3), and transfer bags (10) are provided inside the docking plate (9) and located on the multiple transfer rollers (11). 1) At the upper end, the rear sides of the left and right ends of the docking plate (9) are rotatably connected to the connecting block (12) by the locking pin. The rear end of the casting guide rail (1) is fixedly connected to the hoisting frame (13), and the hoisting frame (13) is located on the upper outside of the transfer slide rail (2) and the transfer plate chain (3). The hoisting frame (13) is composed of the support columns at the front and rear ends and the slide rail rod in the middle. The left side of the rear end of the support column at the front is fixedly connected to the lifting rod (14). The rear side of the lower end of the lifting rod (14) is fixedly connected to the reducer (15), and the reducer (15) is connected to the connecting block (12) through the chain. The outside of the slide rail rod is slidably connected to the hoisting mechanism (25). The rear side of the right end of the transfer plate chain (3) is provided with an electric furnace (26). The transfer plate chain (3) and the sliding plate (4) are provided with a control button (27), and the control button (27) is connected to the inside of the left side of the front end of the transfer plate chain (3) and protrudes from the outside of the transfer plate chain (3). The transfer slide rail (2) and the sliding plate (4) are engaged with each other through a limiting slot and a limiting claw, and slide with each other through multiple rollers, and the multiple rollers are rotatably connected to the inside of the lower end of the sliding plate (4); The upper ends of the multiple conveying rollers (11) are flush with the upper ends of the multiple rollers inside the transfer plate chain (3). The rotating plate (7) and the docking plate (9) can flip the connecting block (12) by the pull of the reducer (15) and the chain, and drive the transfer bag (10) at the upper end of the docking plate (9) to flip together. The control button (27) can control the operation of the transfer plate chain (3) by squeezing and separating the sliding plate (4). The hoisting mechanism (25) consists of a winding transfer machine and a chain hook, and can transfer the transfer bag (10) through the chain hook. The transfer bag (10) can be filled with casting liquid through the electric furnace (26).

2. The semi-automatic casting machine according to claim 1, characterized in that: The support limiting column (5) and the rotating plate (7) are rotatably connected by two rotating seats and two rotating pins. The two rotating seats are fixedly connected to the upper rear side of the two support limiting columns (5), and the two rotating pins are fixedly connected to the upper side of the left and right ends of the rotating plate (7).

3. A semi-automatic casting machine according to claim 2, characterized in that: The two limiting blocks (8) are respectively fixedly connected to the upper ends of the two rotating pins of the rotating plate (7), and wrapped around the outside of the rotating seat on the rear side of the upper end of the supporting limiting column (5), and can fit against the outer wall of the front side of the upper end of the supporting limiting column (5) when the rotating plate (7) rotates to ninety degrees.

4. A semi-automatic casting machine according to claim 1, characterized in that: The upper center of the limiting plate (6) is provided with a lifting slide groove (16) on the front side, and the upper rear side of the lifting slide groove (16) is connected to a gear groove (17). The lifting slide groove (16) is slidably connected to a lifting rod (18). The upper end of the lifting rod (18) is fixedly connected to a casting head (19) with an upward opening, and a casting port is provided at the center of the front end of the casting head (19). The rear end of the lifting rod (18) is provided with a rack groove (20), and the rear end of the rack groove (20) is slidably connected to a lifting gear (21). The connecting block (12) is provided with a gear connecting rod (22) running through it on the left and right sides, and the left end of the gear connecting rod (22) runs through the outside of the left side support limiting post (5). The left end of the gear connecting rod (22) is fixedly connected to a lifting turntable (23), and the left side of the lifting turntable (23) is threadedly connected to a limiting bolt (24).

5. A semi-automatic casting machine according to claim 4, characterized in that: The rack groove (20) and the lifting gear (21) mesh with each other, and the lifting turntable (23) can drive the lifting gear (21) to rotate at the rear end of the rack groove (20) through the gear connecting rod (22), and make the lifting rod (18) and the casting head (19) move up and down.

6. A semi-automatic casting machine according to claim 4, characterized in that: The casting head (19) is composed of a quadrilateral frame at the rear end and a triangular frame at the front end. The outer wall of the quadrilateral frame is in contact with the support and limiting posts (5) on both sides and the rotating plate (7) on the rear side. The casting port at the front end of the casting head (19) is located at the corner of the triangular frame.

7. A semi-automatic casting machine according to claim 4, characterized in that: The upper outer wall of the casting head (19) is always located below the upper outer wall of the support limiting column (5), and the lower end of the rack groove (20) is located inside the lifting rod (18).

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