A casting system for a gear pump

Abstract

This invention relates to the field of metal casting technology and discloses a casting system for a gear pump, including a casting chamber. A casting port is fixedly connected to the side of the casting chamber. An inclined mechanism is movably connected to the bottom end of the side of the casting chamber where the casting port is located. An ejector mechanism is movably connected to the other side of the inclined mechanism. A limit block is fixedly connected to the side of the casting chamber away from the casting port. Fixed rings are fixedly connected to both ends of the middle part of the side of the casting chamber. When the cylinder pushes out the sleeve, the ejector spring will be compressed to different degrees according to the weight of the casting chamber itself. Therefore, the inclination angle of the casting chamber can be adjusted according to its own weight. When the casting chamber rotates, it drives the output plate to rotate. When the output plate rotates, it causes the scraper plate to rotate inside the casting port after being driven by the first gear and the second gear, scraping off the solidified molten material inside the casting port, ensuring consistent casting volume and better finished product quality.

Description

Technical Field

[0001] This invention relates to the field of metal casting technology, and more specifically to a casting system for a gear pump. Background Technology

[0002] A gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gears to transport or pressurize liquids. It consists of two gears, a pump body, and front and rear covers forming two closed spaces. When the gears rotate, the volume of the space on the disengaged side of the gears increases from small to large, forming a vacuum that draws in the liquid. The volume of the space on the meshing side of the gears decreases from large to small, forcing the liquid into the pipeline.

[0003] Gear pumps are generally manufactured using a casting process. During casting, the mold is first cleaned to ensure no air holes are blocked. After preheating the mold, molten raw material is poured into it. Once the molten material has completely solidified, the mold is opened and the pump is removed. The sprue should be clamped during removal. The dimensions of the finished gear pump are then inspected, and the molding sand inside the mold is recycled for reuse. Traditional gear pump casting systems have the following problems:

[0004] During casting, molten raw material is placed into the casting cavity, and the casting cavity is tilted. The molten raw material flows from the pouring gate into the mold, thus completing the casting. Currently, the casting cavity is tilted by a chain. As the casting process progresses, the total amount of molten raw material in the casting cavity decreases. Therefore, if the same feeding method is used for tilting, the amount of casting each time will be insufficient, which will affect the quality of the finished product.

[0005] During casting, molten material flows out from the pouring gate. After casting is completed, the pouring cavity is reset, and the molten material remaining in the pouring gate flows back into the pouring cavity. During the backflow of molten material, the backflow speed is relatively slow, so some molten material remains in the pouring gate and solidifies. When casting again, the remaining and solidified molten material is melted by the newly flowing hot water and enters the mold with it, making it easy for air holes to appear inside the finished product. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present invention provide a casting system for a gear pump to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a casting system for a gear pump, comprising a casting cavity, a casting port fixedly connected to the side of the casting cavity, an inclined mechanism movably connected to the bottom end of the side of the casting cavity where the casting port is located, an ejection mechanism movably connected to the other side of the inclined mechanism, a limit block fixedly connected to the side of the casting cavity away from the casting port, two fixed rings fixedly connected to the two ends of the middle part of the side of the casting cavity, a fixed shaft movably connected to the two fixed rings away from the side of the casting cavity, a mounting plate fixedly connected to the side of the fixed shaft away from the fixed rings, and a scraping mechanism fixedly connected to the top end of the inner side of the two mounting plates;

[0008] The ejection mechanism includes a cylinder that provides power, a sleeve that is fixedly connected to the side of the cylinder, a limit rod that is movably connected to the inside of the sleeve, a gasket that is fixedly connected to the side of the limit rod away from the sleeve, a top plate that is fixedly connected to the other side of the gasket, a limit rod that is provided on the side of the sleeve, and an inclined support mechanism that is fixedly connected to the side of the top plate away from the limit rod.

[0009] The limiting block has an internal clearance groove that matches the output plate. A first gear is fixedly connected to the other side of the output plate. A second gear is movably meshed with the side of the first gear away from the output plate. A scraping plate is fixedly connected to the bottom end of the second gear. The bottom end of the scraping plate contacts the bottom end of the casting port.

[0010] In a preferred embodiment, a wedge block is fixedly connected to the bottom end of the casting cavity near the inside of the casting port, and the top end of the wedge block is in the same straight line position as the bottom end inside the casting port.

[0011] In a preferred embodiment, a connecting rod is movably connected to the side of the inclined support mechanism away from the gasket, and a limiting strip is fixedly connected to the other side of the connecting rod. A groove adapted to the limiting strip is provided on the side of the casting cavity.

[0012] In a preferred embodiment, an inclined plate is fixedly connected to the top end of the connecting rod, and the side of the inclined plate is movably connected to the side of the fixing ring.

[0013] In a preferred embodiment, the diameter of the gasket is one centimeter larger than the diameter of the limiting rod, the sleeve is provided with a limiting ring on the side away from the limiting rod, and the sleeve and the side of the limiting rod are provided with an ejector spring, the ejector spring being located inside the limiting ring of the sleeve and the gasket and in contact with both.

[0014] In a preferred embodiment, a slider is fixedly connected to the bottom end of the cylinder away from the side of the gasket. Connecting plates are fixedly connected to both sides of the slider. A connecting shaft is fixedly connected to the inner side of the two connecting plates away from the slider. A rotating plate is movably sleeved on the side of the connecting shaft. A pad is fixedly connected to the side of the rotating plate. An arc-shaped rod is fixedly connected to the other side of the pad. An arc-shaped cylinder is movably sleeved on the side of the arc-shaped rod away from the pad. The bottom end of the arc-shaped cylinder is fixedly connected to the top end of the slider. Arc-shaped springs are provided on the sides of the arc-shaped rod and the arc-shaped cylinder.

[0015] In a preferred embodiment, the slider has an internal clearance groove that matches the arc-shaped rod. When the arc-shaped rod is located inside the clearance groove of the slider, the top end of the arc-shaped rod and the top end of the arc-shaped cylinder are on the same plane.

[0016] In a preferred embodiment, both the first gear and the second gear are fixedly connected to a gear shaft inside, and support plates are movably connected to both sides of the gear shaft. Support plates are fixedly connected to one side of the support plates, and a fixing rod is fixedly connected to the other side of the support plates.

[0017] In a preferred embodiment, the side of the fixing rod away from the support plate is fixedly connected to the side of the mounting plate, the fixing rod is located 50 centimeters above the casting cavity, and the diameter of the first gear is twice the diameter of the second gear.

[0018] The technical effects and advantages of this invention are as follows:

[0019] 1. The present invention is equipped with a cylinder, a sleeve, an ejector spring, and a limiting rod. During casting, the cylinder pushes out the sleeve, and the sleeve pushes out the limiting rod and the ejector spring simultaneously. The compression of the limiting rod after it is pushed out is inversely proportional to the weight of the casting cavity itself. Therefore, when there is more molten material in the casting cavity, the tilt angle is smaller, and when there is more molten material, the tilt angle is larger. Thus, the tilt angle can be adjusted according to the amount of material in the casting cavity.

[0020] 2. The present invention is provided with an arc-shaped rod, an arc-shaped spring, an arc-shaped cylinder, and a rotating plate. When the ejector mechanism ejects the casting cavity and tilts it, the surface of the casting cavity tilts while the surface of the ejector mechanism remains horizontal. At this time, the tilted casting cavity will cause the rotating plate to tilt. The tilting of the rotating plate will press the arc-shaped rod into the arc-shaped cylinder and compress the arc-shaped spring, thereby ensuring the stability of the casting cavity when it is tilted.

[0021] 3. The present invention is provided with an output plate, a first gear, a second gear, and a scraping plate. When the casting cavity is tilted, the support plate rotates, the output plate rotates and drives the first gear to rotate. The first gear drives the scraping plate to rotate after being transmitted through the second gear. When the scraping plate rotates, it contacts the bottom of the inside of the casting port. Therefore, the scraping plate can automatically scrape off the solidified raw material remaining on the casting port. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention.

[0024] Figure 3 This is a schematic diagram of the ejection mechanism of the present invention.

[0025] Figure 4 This is an exploded view of the inclined support mechanism of the present invention.

[0026] Figure 5 This is a schematic diagram of the internal structure of the casting cavity of the present invention.

[0027] Figure 6 This is a schematic diagram of the scraping mechanism of the present invention.

[0028] The attached figures are labeled as follows: 1. Casting cavity; 2. Casting gate; 3. Mounting plate; 4. Tilting mechanism; 401. Connecting rod; 402. Tilting plate; 403. Limiting strip; 5. Ejection mechanism; 501. Cylinder; 502. Sleeve; 503. Ejection spring; 504. Limiting rod; 505. Shim; 506. Inclined support mechanism; 5061. Slider; 5062. Connecting plate; 5063. Connecting shaft; 5064. Rotary... 5065, Moving plate; 5066, Arc rod; 5067, Arc cylinder; 5068, Arc spring; 507, Top plate; 6, Limiting block; 7, Scraping mechanism; 701, Fixed rod; 702, Support plate; 703, Output plate; 704, First gear; 705, Gear shaft; 706, Second gear; 707, Scraping plate; 708, Support plate; 8, Fixed ring; 9, Fixed shaft; 10, Inclined block. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The casting system of the gear pump involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Reference Figure 1 and Figure 2This invention provides a casting system for a gear pump, including a casting cavity 1, a casting port 2 fixedly connected to the side of the casting cavity 1, an inclined mechanism 4 movably connected to the bottom end of the side of the casting cavity 1 where the casting port 2 is located, an ejection mechanism 5 movably connected to the other side of the inclined mechanism 4, a limiting block 6 fixedly connected to the side of the casting cavity 1 away from the casting port 2, two fixing rings 8 fixedly connected to the two ends of the middle part of the side of the casting cavity 1, a fixing shaft 9 movably connected to the two fixing rings 8 away from the side of the casting cavity 1, a mounting plate 3 fixedly connected to the side of the fixing shaft 9 away from the fixing rings 8, a scraping mechanism 7 fixedly connected to the top end of the inner side of the two mounting plates 3, and an inclined block 10 fixedly connected to the bottom end of the casting cavity 1 near the inner side of the casting port 2, the top end of the inclined block 10 being in the same straight line position as the bottom end inside the casting port 2.

[0031] In this embodiment, the top of the inclined block 10 and the bottom of the casting port 2 are in the same straight line. Therefore, when the casting cavity 1 is rotated, the top of the inclined block 10 and the bottom of the casting port 2 form a straight line. The raw material in the casting cavity 1 can easily flow into the casting port 2 without obstruction. When the top of the inclined block 10 is parallel to the horizontal plane, the raw material inside can flow out completely when it is rotated again. It should be noted that this application connects it to the outside world through the mounting plate 3. The side of the ejection mechanism 5 away from the tilting mechanism 4 should also be connected and fixed to the outside world. Connecting is a conventional technical means in this field, and this application does not specifically limit it.

[0032] Reference Figure 3 and Figure 4 The ejection mechanism 5 includes a cylinder 501 that provides power. A sleeve 502 is fixedly connected to the side of the cylinder 501. A limit rod 504 is movably connected to the inner side of the sleeve 502. A gasket 505 is fixedly connected to the side of the limit rod 504 away from the sleeve 502. A top plate 507 is fixedly connected to the other side of the gasket 505. The side of the sleeve 502 is provided with the limit rod 504. An ejection spring 503 is provided on the side of the sleeve 502 and the side of the limit rod 504. An inclined support mechanism 506 is fixedly connected to the side of the top plate 507 away from the limit rod 504. The inclined support mechanism 506 is located away from the gasket. A connecting rod 401 is movably connected to the side of the plate 505. A limiting strip 403 is fixedly connected to the other side of the connecting rod 401. A sliding groove adapted to the limiting strip 403 is opened on the side of the casting cavity 1. An inclined plate 402 is fixedly connected to the top of the connecting rod 401. The side of the inclined plate 402 is movably connected to the side of the fixing ring 8. The diameter of the gasket 505 is one centimeter larger than the diameter of the limiting rod 504. A limiting ring is provided on the side of the sleeve 502 away from the limiting rod 504. The ejector spring 503 is located inside the limiting ring of the sleeve 502 and the gasket 505 and is in contact with both.

[0033] Through the above technical solution, when the casting cavity 1 needs to be tilted, the sleeve 502 is pushed out by the cylinder 501. When the sleeve 502 is pushed out, it will push out the ejector spring 503. The two sides of the ejector spring 503 are restricted by the gasket 505, the limiting ring of the sleeve 502, the sleeve 502, and the cylinder 501. Therefore, while the ejector spring 503 pushes out the inclined support mechanism 506, the ejector spring 503 itself will be compressed. Affected by the total amount of raw material in the casting cavity 1, when there is more raw material, the ejector spring 503 is compressed more. At this time, the inclined support... The forward movement of the support mechanism 506 is small, and the tilt angle of the connecting rod 401 is small. Therefore, the tilt angle of the casting cavity 1 is small, and the casting speed of the casting cavity 1 is reduced. However, when there is more raw material in the casting cavity 1, the compression of the ejector spring 503 is small, and the tilt angle of the casting cavity 1 is larger, thereby accelerating the casting speed. Therefore, regardless of whether there is more or less raw material, the casting speed of the casting cavity 1 remains constant. The three limiting strips 403 on the side of the connecting rod 401 slide on the side of the casting cavity 1, which can ensure the stability of the casting cavity 1 when it rotates.

[0034] Reference Figure 4 A slider 5061 is fixedly connected to the bottom end of the cylinder 501 away from the side of the gasket 505. Connecting plates 5062 are fixedly connected to both sides of the slider 5061. A connecting shaft 5063 is fixedly connected to the inner side of the two connecting plates 5062 away from the slider 5061. A rotating plate 5064 is movably sleeved on the side of the connecting shaft 5063. A pad 5065 is fixedly connected to the side of the rotating plate 5064. An arc-shaped rod 5066 is fixedly connected to the other side of the pad 5065. An arc-shaped cylinder 5067 is movably sleeved on the side away from the pad 5065. The bottom end of the arc-shaped cylinder 5067 is fixedly connected to the top end of the slider 5061. An arc-shaped spring 5068 is provided on the side of the arc-shaped rod 5066 and the arc-shaped cylinder 5067. The slider 5061 has a clearance groove adapted to the arc-shaped rod 5066 inside. When the arc-shaped rod 5066 is located inside the clearance groove of the slider 5061, the top end of the arc-shaped rod 5066 and the top end of the arc-shaped cylinder 5067 are on the same plane.

[0035] In this embodiment, the side of the rotating plate 5064 away from the pad 5065 is movably connected to the connecting rod 401. Therefore, when the connecting rod 401 drives the casting cavity 1 to rotate, the rotating plate 5064 will rotate around the connecting shaft 5063 due to the pressure from the side of the casting cavity 1. When the rotating plate 5064 rotates, it will drive the pad 5065 and the arc rod 5066 to rotate. When the pad 5065 rotates, it will compress the arc spring 5068, thereby providing support force for the connecting rod 401. The arc rod 5066 moves inside the arc cylinder 5067 to ensure the stability of the equipment during operation. The slider 5061 has a clearance groove inside, so it can fit all the arc rods 5066 in cooperation with the arc cylinder 5067. Therefore, when it rotates to the maximum value, the arc cylinder 5067 can support the rotating plate 5064 to prevent it from being damaged.

[0036] Reference Figure 6 The limiting block 6 has an internal clearance groove that matches the output plate 703. A first gear 704 is fixedly connected to the other side of the output plate 703. A second gear 706 is movably meshed with the side of the first gear 704 away from the output plate 703. A scraping plate 707 is fixedly connected to the bottom end of the second gear 706. The bottom end of the scraping plate 707 contacts the bottom end inside the casting port 2. Gear shafts 705 are fixedly connected inside both the first gear 704 and the second gear 706. Support plates 708 are movably connected to both sides of the gear shafts 705. A support plate 702 is fixedly connected to the side of the support plate 708. A fixing rod 701 is fixedly connected to the other side of the support plate 702. The side of the fixing rod 701 away from the support plate 702 is fixedly connected to the side of the mounting plate 3. The fixing rod 701 is located 50 centimeters above the casting cavity 1. The diameter of the first gear 704 is twice the diameter of the second gear 706.

[0037] In this embodiment, when the casting cavity 1 starts to rotate, it drives the output plate 703 to rotate. The limiting block 6 ensures that the output plate 703 does not swing arbitrarily when rotating. After the output plate 703 rotates through the first gear 704 and the gear shaft 705, the scraping plate 707 rotates upward. The upward rotation of the scraping plate 707 does not affect the flow of raw materials in the casting cavity 1. After casting is completed, the casting cavity 1 is reset. When the casting cavity 1 is reset, the output plate 703 rotates in the opposite direction, thereby causing the scraping plate 707 to rotate upward. When the scraping plate 707 rotates in the reverse direction, it scrapes the residual material at the bottom of the casting port 2 into the casting cavity 1, thereby preventing residue. The diameter of the first gear 704 is twice the diameter of the second gear 706, which ensures that the scraping plate 707 can rotate a sufficient distance for cleaning. The fixing rod 701 is located above the casting cavity 1, so when the casting cavity 1 rotates to the highest point, it will contact the fixing rod 701 to prevent it from over-transmission and overturning, thus ensuring safety.

[0038] Working principle of the invention:

[0039] This invention solves the problems of tilting of the casting cavity 1 and material residue in the casting port 2 during casting.

[0040] Regarding the tilting issue of casting cavity 1, when casting cavity 1 needs to be tilted, cylinder 501 pushes out sleeve 502. After sleeve 502 is pushed out, it drives ejector spring 503 to move forward. Ejector spring 503 drives limit rod 504 and shim 505 to move forward. Shim 505 drives top plate 507 to move forward. When top plate 507 drives slider 5061 to move forward, rotating plate 5064, which is movably connected to slider 5061, contacts the side of casting cavity 1. At this time, the entire casting cavity 1 rotates around the fixed axis. 9. When the casting cavity 1 rotates, the rotating plate 5064 rotates. When the rotating plate 5064 rotates, it drives the arc rod 5066 to move in the arc cylinder 5067 through the pad 5065 and compress the arc spring 5068. When there is more raw material in the casting cavity 1, the compression of the ejector spring 503 is larger. At this time, the tilt angle of the casting cavity 1 is smaller. When there is less raw material in the casting cavity 1, the compression of the ejector spring 503 is smaller. At this time, the tilt angle of the casting cavity 1 is larger. The angle of rotation of the casting cavity 1 is automatically adjusted.

[0041] To address the issue of cleaning residual material inside the casting port 2, when the casting cavity 1 starts to rotate, it drives the output plate 703 to rotate. The rotation of the output plate 703 is transmitted through the first gear 704 and the gear shaft 705, causing the scraper plate 707 to rotate upward. The upward rotation of the scraper plate 707 does not affect the outflow of material from the casting cavity 1. After casting is completed, the casting cavity 1 resets. When the casting cavity 1 resets, the output plate 703 rotates in the opposite direction, which in turn causes the scraper plate 707 to rotate in the opposite direction. When the scraper plate 707 rotates in the opposite direction, it scrapes the residual material at the bottom of the casting port 2 into the casting cavity 1, thereby preventing residue.

[0042] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0043] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures that are relevant to the implementation of this disclosure. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0044] In conclusion, the above description is merely an 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 principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A casting system for a gear pump, comprising a casting cavity (1), characterized in that: A casting port (2) is fixedly connected to the side of the casting cavity (1). A tilting mechanism (4) is movably connected to the bottom end of the side of the casting cavity (1) where the casting port (2) is located. An ejection mechanism (5) is movably connected to the other side of the tilting mechanism (4). A limit block (6) is fixedly connected to the side of the casting cavity (1) away from the casting port (2). Fixed rings (8) are fixedly connected to both ends of the middle part of the side of the casting cavity (1). Fixed shafts (9) are movably connected to the sides of the two fixed rings (8) away from the casting cavity (1). Mounting plates (3) are fixedly connected to the sides of the fixed shafts (9) away from the fixed rings (8). A scraping mechanism (7) is fixedly connected to the top of the inner side of the two mounting plates (3). The ejection mechanism (5) includes a cylinder (501) that provides power. A sleeve (502) is fixedly connected to the side of the cylinder (501). A limit rod (504) is movably connected to the inner side of the sleeve (502). A gasket (505) is fixedly connected to the side of the limit rod (504) away from the sleeve (502). A top plate (507) is fixedly connected to the other side of the gasket (505). The side of the sleeve (502) is provided with the limit rod (504). An inclined support mechanism (506) is fixedly connected to the side of the top plate (507) away from the limit rod (504). The diameter of the gasket (505) is one centimeter larger than the diameter of the limiting rod (504). The sleeve (502) and the side of the limiting rod (504) are provided with ejector springs (503). The side of the sleeve (502) away from the limiting rod (504) is provided with a limiting ring. The ejector spring (503) is located inside the limiting ring of the sleeve (502) and the gasket (505) and is in contact with both. A slider (5061) is fixedly connected to the bottom end of the cylinder (501) away from the side of the gasket (505). Connecting plates (5062) are fixedly connected to both sides of the slider (5061). A connecting shaft (5063) is fixedly connected to the inner side of the two connecting plates (5062) away from the slider (5061). A rotating plate (5064) is movably sleeved on the side of the connecting shaft (5063). A pad (5065) is fixedly connected to the side of the rotating plate (5064). An arc rod (5066) is fixedly connected to the other side of the pad (5065). An arc cylinder (5067) is movably sleeved on the side of the arc rod (5066) away from the pad (5065). The bottom end of the arc cylinder (5067) is fixedly connected to the top end of the slider (5061). An arc spring (5068) is provided on the side of the arc rod (5066) and the arc cylinder (5067). The limiting block (6) has an internal clearance groove that is compatible with the output plate (703). A first gear (704) is fixedly connected to the other side of the output plate (703). A second gear (706) is movably meshed with the side of the first gear (704) away from the output plate (703). A scraping plate (707) is fixedly connected to the bottom end of the second gear (706). The bottom end of the scraping plate (707) is in contact with the bottom end inside the casting port (2).

2. The casting system for a gear pump according to claim 1, characterized in that: An inclined block (10) is fixedly connected to the bottom end of the casting cavity (1) near the inside of the casting port (2). The top end of the inclined block (10) is in the same straight line position as the bottom end inside the casting port (2).

3. The casting system for a gear pump according to claim 1, characterized in that: The inclined support mechanism (506) is movably connected to a connecting rod (401) on the side away from the gasket (505). A limiting strip (403) is fixedly connected to the other side of the connecting rod (401). A sliding groove adapted to the limiting strip (403) is opened on the side of the casting cavity (1).

4. The casting system for a gear pump according to claim 3, characterized in that: An inclined plate (402) is fixedly connected to the top of the connecting rod (401), and the side of the inclined plate (402) is movably connected to the side of the fixing ring (8).

5. The casting system for a gear pump according to claim 1, characterized in that: The slider (5061) has an internal clearance groove that is adapted to the arc rod (5066). When the arc rod (5066) is located inside the clearance groove of the slider (5061), the top end of the arc rod (5066) and the top end of the arc cylinder (5067) are on the same plane.

6. The casting system for a gear pump according to claim 1, characterized in that: The first gear (704) and the second gear (706) are both fixedly connected to a gear shaft (705). A support plate (708) is movably connected to both sides of the gear shaft (705). A support plate (702) is fixedly connected to the side of the support plate (708). A fixing rod (701) is fixedly connected to the other side of the support plate (702).

7. The casting system for a gear pump according to claim 6, characterized in that: The fixing rod (701) is fixedly connected to the side of the mounting plate (3) away from the support plate (702). The fixing rod (701) is located 50 centimeters above the casting cavity (1). The diameter of the first gear (704) is twice the diameter of the second gear (706).

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