Propeller casting mold

Abstract

The utility model relates to the technical field of propeller production, in particular to a propeller casting mold. Comprising a lower mold plate and an upper mold plate arranged above the lower mold plate, and paddle shaft casting molds are coaxially fixed to the sides, close to each other, of the upper mold plate and the lower mold plate. According to the utility model, after the two paddle shaft casting dies are assembled up and down and the plurality of paddle casting dies are assembled up and down, a worker rotates the plurality of first nuts in sequence to enable the first nuts to move downwards along the axis direction of the vertical rod, so that the upper die plate and the lower die plate are close to each other, and the upper die plate and the lower die plate respectively drive the corresponding paddle casting dies to move; a plurality of second nuts are rotated by a worker in sequence, so that the second nuts are matched with end caps to push an upper baffle and a lower baffle to be close to each other, the gap between the two blade casting molds after mold closing is further reduced, and the sealing performance of a propeller forming cavity is enhanced; and the possibility that molten metal leaks from the interior of the forming cavity is reduced.

Description

Technical Field

[0001] This utility model relates to the field of propeller manufacturing technology, specifically to a propeller casting mold. Background Technology

[0002] Large marine propellers are typically produced using mold casting. After the upper and lower molds used for casting the propeller are closed, the interior of the closed upper and lower molds forms a complete propeller forming cavity. Workers pour molten metal into the inside of the propeller forming cavity and wait for the molten metal to solidify inside the propeller forming cavity. Then, hoisting equipment is used to lift the upper mold from above the lower mold, and the solidified propeller can be taken out from the inside of the propeller forming cavity, completing the casting of the propeller.

[0003] In existing technologies, the upper and lower molds are usually welded together to prevent the molten metal from creating a gap between them after the molds are closed. When the worker pours the molten metal into the propeller forming cavity, the pressure inside the cavity increases. The molten metal exerts an outward pushing force on the upper and lower molds, causing them to move away from each other and creating a gap between them after the molds are closed. During the process of creating a gap between the upper and lower molds, the connecting parts that were previously welded to the molds may detach due to the force between them. The connecting parts may fly off during detachment, which increases the danger to the workers. At the same time, when a gap appears between the upper and lower molds, the high-temperature molten metal leaks out of the gap to the outside of the propeller forming cavity and solidifies. The solidified metal is unusable and needs to be removed later, reducing the casting quality of the propeller.

[0004] Meanwhile, after the upper and lower molds are closed, workers need to weld the connecting parts one by one onto the upper and lower molds. After the propeller solidifies and forms inside the molding cavity, workers need to spend a lot of time desoldering the connecting parts in order to demold the upper and lower molds and remove the propeller. The operation is troublesome and reduces the casting efficiency of the propeller. Utility Model Content

[0005] The purpose of this invention is to provide a propeller casting mold to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides a propeller casting mold, including a lower template and an upper template disposed above the lower template. A propeller shaft casting mold is coaxially fixed to one side of both the upper and lower templates, and the two propeller shaft casting molds are joined together. Several first locking mechanisms are provided between the lower and upper templates, pressing the upper template closer to the lower template. Several lower baffles are fixed in a circular array on the circumferential sidewall of the lower propeller shaft casting mold, and an upper baffle is fixed to the circumferential sidewall of the upper propeller shaft casting mold at a position corresponding to each lower baffle. A blade casting mold is fixed to one side of both the upper and lower baffles, and the blade casting molds on the lower baffles and the corresponding upper baffles are joined together to form a propeller blade model space. Several second locking mechanisms are provided between the upper baffles and the corresponding lower baffles, pressing the upper baffle closer to the corresponding lower baffle.

[0007] As a further improvement to this technical solution, several through slots are provided on the upper template near the edge. The first locking mechanism includes a vertical rod fixed to the upper side wall of the lower template near the edge. The upper end of the rod passes through one of the through slots and extends to the top of the upper template.

[0008] As a further improvement to this technical solution, the first locking mechanism also includes a square frame disposed on the upper side wall of the upper template and a lifting column disposed on the upper side wall of the square frame. The upper end of the upright rod slides through the through groove, the square frame and the lifting column in sequence and is threadedly connected to a first nut. When the first nut is tightened, it presses the square frame and the lifting column towards the upper template.

[0009] As a further improvement to this technical solution, the second locking mechanism includes an end cap located near the edge of the lower sidewall of the lower baffle. A rod is coaxially fixed to the upper sidewall of the end cap. The upper end of the rod slides through the lower baffle and the upper baffle and is threadedly connected to a second nut. The lower sidewall of the second nut contacts the upper sidewall of the upper baffle.

[0010] As a further improvement to this technical solution, the second locking mechanism also includes a convex ring coaxially fixed on the insert rod near the middle position. The convex ring is disposed on one side of the blade casting mold and is located between the lower baffle and the upper baffle.

[0011] As a further improvement to this technical solution, the second locking mechanism includes a locking groove formed on the end cap, a locking rod slidably disposed inside the locking groove, one end of the locking rod extending to the outside of the locking groove and fixed with a handle, a guide sleeve fixed to the lower side wall of the lower baffle is slidably sleeved on the locking rod, the guide sleeve is disposed between the handle and the end cap, and a limit plate is fixed to the lower side wall of the lower baffle, the limit plate being located on the side of the handle away from the locking rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. In this propeller casting mold, after the two propeller shaft casting molds and several blade casting molds are closed, the worker rotates several first nuts in sequence, causing the first nuts to move downwards along the axis of the upright, which brings the upper and lower molds closer together. The upper and lower molds then drive the corresponding blade casting molds to move, thereby reducing the gap between the two blade casting molds after they are closed. Then, the worker rotates several second nuts in sequence, causing the second nuts and end caps to cooperate in pushing the upper and lower baffles closer together, thereby further reducing the gap between the two blade casting molds after they are closed, enhancing the sealing of the propeller forming cavity, and reducing the possibility of molten metal leaking from the inside of the forming cavity. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the first locking mechanism of this utility model;

[0016] Figure 3 This is an exploded view of the first locking mechanism of this utility model;

[0017] Figure 4 This is a cross-sectional view of the overall structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the second locking mechanism of this utility model;

[0019] Figure 6 This is an exploded view of the second locking mechanism of this utility model.

[0020] The meanings of the labels in the diagram are as follows:

[0021] 1. Download the template;

[0022] 2. Upper template; 21. Through groove;

[0023] 3. First locking mechanism; 31. Upright pole; 32. Square frame; 33. Lifting column; 34. First nut;

[0024] 4. Paddle shaft casting mold; 41. Lower baffle; 42. Upper baffle;

[0025] 5. Paddle casting mold;

[0026] 6. Second locking mechanism; 61. End cap; 611. Lock groove; 62. Insert rod; 63. Second nut; 64. Protruding ring; 65. Locking rod; 66. Guide sleeve; 67. Handle head; 68. Limiting plate;

[0027] 7. Support rod. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1

[0030] Please see Figure 1As shown, one of the objectives of this embodiment is to provide a propeller casting mold, including a lower mold plate 1 and an upper mold plate 2 disposed above the lower mold plate 1. The lower mold plate 1 and the upper mold plate 2 are discs with the same outer diameter. A propeller shaft casting mold 4 is coaxially fixed on the side of the upper mold plate 2 and the lower mold plate 1 that are close to each other. The two propeller shaft casting molds 4 are closed to form a model space for the propeller shaft. Several lower baffles 41 are fixed in a ring array on the circumferential side wall of the lower propeller shaft casting mold 4. An upper baffle 42 is fixed on the circumferential side wall of the upper propeller shaft casting mold 4 at a position corresponding to each lower baffle 41. Both the lower baffles 41 and the upper baffles 42 are fan-shaped, and the upper baffles 42 and the lower baffles 41 are close to each other. One side of each mold has a blade casting mold 5 fixed to it. The upper blade casting mold 5 is connected to the upper propeller shaft casting mold 4, and the lower blade casting mold 5 is connected to the lower propeller shaft casting mold 4. The blade casting mold 5 on the lower baffle 41 and the corresponding blade casting mold 5 on the upper baffle 42 are closed to form a propeller blade model space. Several support rods 7 are provided between the upper baffle 42 and the upper template 2, and between the lower baffle 41 and the lower template 1. The two ends of the lower support rod 7 are welded and fixed to the lower template 1 and the lower baffle 41, respectively. The lower support rod 7 provides support for the lower baffle 41, thereby improving the structural strength of the lower baffle 41 and the lower blade casting mold 5. For stability, the two ends of the upper support rod 7 are movably connected to the upper template 2 and the upper baffle 42, respectively. After several blade casting molds 5 are closed, the worker inserts the upper support rod 7 vertically between the upper baffle 42 and the upper template 2, so that the two ends of the upper support rod 7 are in close contact with the upper side wall of the upper baffle 42 and the lower side wall of the upper template 2, respectively. This causes the upper support rod 7 to press the upper baffle 42 downward, causing the upper baffle 42 to move the upper blade casting mold 5 closer to the lower blade casting mold 5, thereby reducing the gap between the several blade casting molds 5 after mold closing and ensuring a tight connection between the two blade casting molds 5. The two blades are cast after mold closing. The internal space of mold 4 and several blade casting molds 5 forms a complete propeller forming cavity. At the same time, a casting port is opened on the upper mold plate 2, which is connected to the inside of the propeller shaft casting mold 4 located above. When the worker continuously pours molten metal into the inside of the propeller shaft casting mold 4 through the casting port, the molten metal will fill the inside of the propeller forming cavity under the action of gravity. After the molten metal solidifies inside the propeller forming cavity, the worker uses a hoisting device to lift the upper mold plate 2 upward, so that the propeller shaft casting mold 4 and blade casting mold 5 located above are separated from the propeller shaft casting mold 4 and blade casting mold 5 located below. The worker can then take out the solidified propeller from the inside of the propeller forming cavity, completing the casting of the propeller.

[0031] When workers pour molten metal into the propeller forming cavity through the casting gate, the high temperature of the molten metal increases the internal pressure. This increased pressure exerts an upward thrust on the upper blade casting mold 5, creating a gap between the two molded blades 5 after they are closed. If the high-temperature molten metal leaks through this gap to the outside of the propeller forming cavity, it poses a safety hazard and reduces the casting quality of the propeller. Current technology typically uses several connectors to weld the two molded blades 5 together to prevent the molten metal from creating a gap. However, the strength of these connectors depends on the worker's welding skills. If the welding quality between the two molded blades 5 is substandard, the connectors are prone to detachment. Furthermore, welding these connectors is time-consuming, and after the propeller solidifies inside the forming cavity, workers still need to spend considerable time detaching the connectors. This cumbersome process reduces the propeller's casting efficiency.

[0032] To solve the above problems, several through slots 21 are provided on the upper template 2 near the edge. Several first locking mechanisms 3 are provided between the lower template 1 and the upper template 2. The first locking mechanisms 3 press the upper template 2 towards the lower template 1. The structure of the first locking mechanism 3 is detailed below, refer to Figures 1-3 The first locking mechanism 3 includes a vertically fixed pole 31 near the edge of the upper side wall of the lower template 1. The upper end of the pole 31 passes through one of the through slots 21 and extends above the upper template 2. The first locking mechanism 3 also includes a square frame 32 set on the upper side wall of the upper template 2 and a lifting tube 33 set on the upper side wall of the square frame 32. The upper end of the pole 31 slides through the through slot 21, the square frame 32 and the lifting tube 33 in sequence and is threadedly connected to a first nut 34. When the first nut 34 is tightened, it presses the square frame 32 and the lifting tube 33 towards the upper template 2. When the worker rotates several first nuts 34 in sequence, the locking mechanism is completed by the first nut 34. The threaded connection between the first nut 34 and the upright 31 causes the first nut 34 to move downward along the axis of the upright 31. The downward movement of the first nut 34 presses the lifting column 33 and the square frame 32 downward, causing a slight relative movement between the square frame 32 and the upright 31. The square frame 32 presses the upper template 2 closer to the lower template 1, thereby bringing the upper template 2 and the lower template 1 closer to each other. The upper template 2 and the lower template 1 respectively drive the corresponding blade casting mold 5 to move through the propeller shaft casting mold 4, thereby reducing the gap between the two blade casting molds 5 after mold closing, enhancing the sealing of the propeller forming cavity, and reducing the possibility of molten metal leaking from the inside of the forming cavity.

[0033] Meanwhile, several second locking mechanisms 6 are provided between the upper baffle 42 and the corresponding lower baffle 41. The second locking mechanisms 6 press the upper baffle 42 toward the corresponding lower baffle 41. The structure of the second locking mechanism 6 is described in detail below, referring to... Figures 4-6 The second locking mechanism 6 includes an end cap 61 located near the edge of the lower side wall of the lower baffle 41. A rod 62 is coaxially fixed to the upper side wall of the end cap 61. The upper end of the rod 62 slides through the lower baffle 41 and the upper baffle 42 and is threadedly connected to a second nut 63. The lower side wall of the second nut 63 contacts the upper side wall of the upper baffle 42. When the worker rotates several second nuts 63 in sequence, the second nuts 63 rotate relative to the rod 62. Through the threaded connection between the second nuts 63 and the rod 62, the second nuts 63 move closer to the end cap 61 along the axis of the rod 62. The second nuts 63 and the end cap 61 cooperate to push the upper baffle 42 and the lower baffle 41 closer to each other. The upper baffle 42 pushes the upper blade casting mold 5 closer to the lower blade casting mold 5, and the lower baffle 41 pushes the lower blade casting mold 5 closer to the upper blade casting mold 5, thereby further reducing the gap between the two blade casting molds 5 after mold closing.

[0034] Before demolding the upper and lower propeller casting molds 5, the worker needs to unscrew the second nut 63 from the corresponding insert rod 62, disengaging the insert rod 62 from the upper baffle 42 and releasing the second locking mechanism 6 from locking the upper baffle 42. When the insert rod 62 and the second nut 63 are disengaged and the worker releases the insert rod 62, it will fall downwards under gravity, separating it from the lower baffle 41. When the worker subsequently uses this mold to cast propellers, the insert rod 62 needs to be reinserted into the corresponding through holes on the lower and upper baffles 41, which is inconvenient. To solve this problem, the second locking mechanism 6 also includes... A convex ring 64 is coaxially fixed to the insert rod 62 near the middle position. The convex ring 64 is located on one side of the propeller casting mold 5, between the lower baffle 41 and the upper baffle 42. As the insert rod 62 falls downward under the action of gravity, the convex ring 64 will contact the upper side wall of the lower baffle 41. At this time, the convex ring 64 will prevent the insert rod 62 from moving downward, keeping the insert rod 62 in contact with the lower baffle 41. This makes it convenient for the worker to pass the insert rod 62 through the upper baffle 42 again, so that the lower baffle 41 and the upper baffle 42 are tightly connected. This allows the second locking mechanism 6 to fix the position between the lower baffle 41 and the upper baffle 42, improving the sealing of the propeller forming cavity.

[0035] When the worker rotates the second nut 63, it is necessary to ensure that the insertion rod 62 does not rotate synchronously with the second nut 63. To achieve this, the second locking mechanism 6 includes a locking groove 611 formed on the end cap 61. A locking rod 65 is slidably disposed inside the locking groove 611. One end of the locking rod 65 extends to the outside of the locking groove 611 and is fixed with a handle 67. The worker can easily move the locking rod 65 by holding the handle 67. A guide sleeve 66 fixed to the lower side wall of the lower baffle 41 is slidably sleeved on the locking rod 65. The guide sleeve 66 is disposed between the handle 67 and the end cap 61. The guide sleeve 66 restricts the movement direction of the locking rod 65, so that the locking rod 65 and the locking groove 611 cooperate to prevent the insertion rod 62 from rotating with the second nut 63. At the same time, when the locking rod 65 is pulled out from inside the locking groove 611, the guide sleeve 66 restricts the movement direction of the locking rod 65, so that the locking rod 65 can only move along the axis of the locking rod 65, thereby facilitating the subsequent locking of the locking rod 65. One end is inserted into the lock groove 611 again, and a limiting plate 68 is fixed on the lower side wall of the lower baffle 41. The limiting plate 68 is located on the side of the handle 67 away from the locking rod 65, and the axis of the locking rod 65 passes through the limiting plate 68. When the handle 67 contacts the limiting plate 68, the limiting plate 68 blocks the handle 67, preventing the handle 67 from moving further away from the end cap 61. At this time, the distance between the handle 67 and the guide sleeve 66 reaches its maximum. By blocking the handle 67 with the limiting plate 68, the locking rod 65 and the guide sleeve 66 will not separate. At this time, the locking rod 65 is still slidably set inside the guide sleeve 66, thereby avoiding the risk of the locking rod 65 being lost. After the second nut 63 is removed from the insert rod 62, the worker can pull the insert rod 62 downward by pulling the locking rod 65 out of the lock groove 611, so that the insert rod 62 and the upper baffle 42 are disengaged, thereby releasing the second locking mechanism 6 from locking the upper baffle 42.

[0036] When using this mold, workers use hoisting equipment to lift the upper template 2 above the lower template 1, and then close the two propeller shaft casting molds 4 and the several propeller blade casting molds 5. During this process, the upper ends of several uprights 31 will extend through several through slots 21 to the top of the upper template 2. Then, the workers will perform the following operations on each upright 31 in sequence: first, put the square frame 32 on the upright 31 and make the square frame 32 contact the upper side wall of the upper template 2; then, put the lifting tube 33 on the upright 31 and make the lifting tube 33 contact the upper side wall of the square frame 32; then, tighten the first nut 34 onto the upright 31 and make the first nut 34 contact the lifting tube 33. By contacting the upper sidewall, the sealing of the propeller forming cavity can be enhanced by the first locking mechanism 3. The worker then performs the following operations on several second locking mechanisms 6: First, push the end cap 61 upward to the position of contacting the lower sidewall of the lower baffle 41, so that the upper end of the insert rod 62 passes through the corresponding hole on the upper baffle 42 and extends above the upper baffle 42. Then, insert one end of the locking rod 65 into the inside of the locking groove 611 to restrict the rotation of the end cap 61. Then, screw the second nut 63 onto the insert rod 62 and make the second nut 63 contact the upper sidewall of the upper baffle 42. The sealing of the propeller forming cavity can be enhanced by the second locking mechanism 6, reducing the possibility of molten metal leaking from the inside of the forming cavity.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A propeller casting mold, comprising a lower mold plate (1) and an upper mold plate (2) disposed above the lower mold plate (1), wherein a propeller shaft casting mold (4) is coaxially fixed on one side of the upper mold plate (2) and the lower mold plate (1) that are close to each other, and the two propeller shaft casting molds (4) are closed together, characterized in that: A plurality of first locking mechanisms (3) are provided between the lower template (1) and the upper template (2). The first locking mechanisms (3) press the upper template (2) toward the lower template (1). A plurality of lower baffles (41) are fixed in a ring array on the circumferential sidewall of the propeller shaft casting mold (4) located below. An upper baffle (42) is fixed at a position corresponding to each lower baffle (41) on the circumferential sidewall of the propeller shaft casting mold (4) located above. A propeller blade casting mold (5) is fixed on the side of the upper baffle (42) and the lower baffle (41) that are close to each other. The propeller blade casting mold (5) on the lower baffle (41) and the corresponding propeller blade casting mold (5) on the upper baffle (42) are closed to form a model space for the propeller blade. A plurality of second locking mechanisms (6) are provided between the upper baffle (42) and the corresponding lower baffle (41). The second locking mechanisms (6) press the upper baffle (42) toward the corresponding lower baffle (41).

2. The propeller casting mold according to claim 1, characterized in that: The upper template (2) has several through slots (21) near the edge. The first locking mechanism (3) includes a vertical rod (31) fixed to the upper side wall of the lower template (1) near the edge. The upper end of the rod (31) passes through one of the through slots (21) and extends to the top of the upper template (2).

3. The propeller casting mold according to claim 2, characterized in that: The first locking mechanism (3) further includes a square frame (32) set on the upper side wall of the upper template (2) and a lifting column (33) set on the upper side wall of the square frame (32). The upper end of the upright (31) slides through the through groove (21), the square frame (32) and the lifting column (33) in sequence and is threadedly connected to a first nut (34). When the first nut (34) is tightened, it presses the square frame (32) and the lifting column (33) towards the upper template (2).

4. The propeller casting mold according to claim 1, characterized in that: The second locking mechanism (6) includes an end cap (61) located near the edge of the lower side wall of the lower baffle (41). A rod (62) is coaxially fixed to the upper side wall of the end cap (61). The upper end of the rod (62) slides through the lower baffle (41) and the upper baffle (42) and is threadedly connected to a second nut (63). The lower side wall of the second nut (63) contacts the upper side wall of the upper baffle (42).

5. The propeller casting mold according to claim 4, characterized in that: The second locking mechanism (6) also includes a convex ring (64) coaxially fixed on the insert rod (62) near the middle position. The convex ring (64) is disposed on one side of the blade casting mold (5) and is located between the lower baffle (41) and the upper baffle (42).

6. The propeller casting mold according to claim 4, characterized in that: The second locking mechanism (6) further includes a locking groove (611) opened on the end cap (61). A locking rod (65) is slidably arranged inside the locking groove (611). One end of the locking rod (65) extends to the outside of the locking groove (611) and is fixed with a handle (67). A guide sleeve (66) fixed to the lower side wall of the lower baffle (41) is slidably sleeved on the locking rod (65). The guide sleeve (66) is arranged between the handle (67) and the end cap (61). A limit plate (68) is fixed to the lower side wall of the lower baffle (41). The limit plate (68) is located on the side of the handle (67) away from the locking rod (65).

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