Multi-layer mold for propeller sand casting

Abstract

The utility model relates to a multi-layer mold, in particular to a multi-layer mold for propeller sand casting. Comprising a bottom die shell, and a first square frame, a second square frame and a top die shell are sequentially arranged on the upper side of the bottom die shell from bottom to top. According to the multi-layer mold, when square frames in the bottom mold shell, the first square frame, the second square frame and the top mold shell are stacked up and down, relative movement between every two adjacent square frames is limited through the multiple rotating plates in the vertical state, the four square frames are aligned up and down, and therefore the quality of propellers cast by the multi-layer mold is guaranteed; when the bottom die shell, the first square frame, the second square frame and the top die shell in the idle state are independently stored, an operator rotates the multiple rotating plates to be in the horizontal state by operating the rotating assembly, and the rotating plates can be prevented from blocking the lower side wall of the square frame from making contact with the ground; and the storage stability of the bottom mold shell, the first square frame, the second square frame and the top mold shell is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of multi-layer molds, specifically, a kind of multi-layer mold for propeller sand casting. BACKGROUND

[0002] Multi-layer mold is a kind of mold, by stacking multiple cavities or cores on a mold to achieve efficient production, this mold design can save materials, reduce production costs, and improve production efficiency, multi-layer mold is widely used in rubber ring, tool parts coating, casting and many other fields, suitable for casting such as propeller and other complex shape, high-precision products.

[0003] Multi-layer mold is composed of several single-layer molds stacked up and down, and it is necessary to ensure that the several single-layer molds are aligned up and down during use, so that the cavities in the several single-layer molds are accurately matched, and the quality of the products cast in the cavities is ensured. In the prior art, several blocking bars are usually welded on the four sides of the single-layer mold. When the several single-layer molds are stacked up and down, the several blocking bars come into contact with the four sides of the single-layer mold located below to limit the relative movement between the two adjacent single-layer molds, ensuring that the several single-layer molds are aligned up and down. However, when the single-layer mold in idle state is stored alone, the blocking bar will hinder the lower side wall of the single-layer mold from touching the ground, and increase the occupied space of the single-layer mold, causing inconvenience in storing the single-layer mold. SUMMARY

[0004] The utility model aims at providing a kind of multi-layer mold for propeller sand casting to solve the problems raised in the above background.

[0005] To achieve the above-mentioned purpose, one of the purposes of the utility model is to provide a kind of multi-layer mold for propeller sand casting, which comprises a bottom mold shell. The upper side of the bottom mold shell is sequentially provided with a first square frame, a second square frame and a top mold shell from bottom to top. The bottom mold shell, the first square frame, the second square frame and the top mold shell all comprise a square frame composed of four square plates connected end to end. The bottom mold shell is composed of a square frame and a bottom plate fixed to the lower side wall of the square frame. The top mold shell is composed of a square frame, a cover plate fixed to the upper side wall of the square frame and a pouring bucket fixed to the upper side wall of the cover plate. The first square frame, the second square frame and the top mold shell are all provided with an alignment mechanism. The alignment mechanism comprises several rotating plates rotatably arranged around the square frame. The rotating plates and the square frame are rotatably connected at a position close to the bottom end of the square frame. A rotating assembly for driving the several rotating plates to rotate synchronously is arranged on the square frame. When the rotating plates are rotated to a vertical state, the lower end of the rotating plates comes into contact with the side wall of the adjacent square frame located below.

[0006] As a further improvement of the technical solution, the rotating assembly comprises four worm gears respectively arranged on four sides of the square frame, the ends of two adjacent worm gears are arranged close to each other, the worm gears are arranged on the upper side of the rotating plate, a worm wheel is fixedly arranged on the side of the rotating plate away from the square frame, the connecting part of the worm wheel and the rotating plate and the square frame is coaxially arranged, and a plurality of worm wheels are respectively engaged with the four worm gears.

[0007] As a further improvement of the technical solution, the rotating assembly further comprises bevel gears coaxially fixedly arranged at the two ends of the worm gears, two adjacent bevel gears are engaged, one end of one of the worm gears is coaxially fixedly arranged with an extension rod, and a knob is coaxially fixedly arranged on the extension rod.

[0008] As a further improvement of the technical solution, when the rotating assembly drives the rotating plate to rotate to a horizontal state, the rotating plate is located on the upper side of the lower side wall of the corresponding square frame.

[0009] As a further improvement of the technical solution, two lifting rods are symmetrically fixedly arranged on the opposite sides of the bottom mold shell, the first square frame, the second square frame and the top mold shell, and the lifting rods are located on the upper side of the worm gears.

[0010] Compared with the prior art, the utility model has the advantages of:

[0011] The multilayer mold for propeller sand casting is stacked on the square frames of the bottom mold shell, the first square frame, the second square frame and the top mold shell, the relative movement between two adjacent square frames is limited by the rotating plates in the vertical state, the four square frames are aligned, the quality of the propeller cast by the multilayer mold is ensured, when the bottom mold shell, the first square frame, the second square frame and the top mold shell in the idle state are stored separately, the operator can rotate the rotating plates to the horizontal state by operating the rotating assembly, the lower side wall of the square frame can avoid being hindered by the rotating plate, the stability of the bottom mold shell, the first square frame, the second square frame and the top mold shell during storage is ensured, the occupied space of the bottom mold shell, the first square frame, the second square frame and the top mold shell is reduced, and the bottom mold shell, the first square frame, the second square frame and the top mold shell are convenient to store. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is an exploded view of the overall structure of the utility model;

[0014] Figure 3 It is a schematic diagram of part of the structure of the utility model;

[0015] Figure 4 It is a schematic diagram of part of the structure of the utility model;Figure 3 Structure enlarged view at A in the middle.

[0016] The meaning of each reference numeral in the drawing is as follows:

[0017] 1, bottom mold shell; 2, first square frame; 3, second square frame; 4, top mold shell;

[0018] 5, aligning mechanism; 51, rotating plate; 52, worm gear; 53, worm; 54, bevel gear; 55, extension rod;

[0019] 6, hoisting rod. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] Embodiment 1

[0022] Please refer to Figures 1-4The purpose of the embodiment is to provide a multi-layer mold for propeller sand casting. The multi-layer mold comprises a bottom mold shell 1, the upper side of the bottom mold shell 1 is sequentially provided with a first square frame 2, a second square frame 3 and a top mold shell 4 from bottom to top, two lifting rods 6 are symmetrically and fixedly arranged on the opposite sides of the bottom mold shell 1, the first square frame 2, the second square frame 3 and the top mold shell 4, the hooks of hoisting equipment are connected to the lifting rods 6, the hoisting equipment is used by the operator to hoist and transfer the bottom mold shell 1, the first square frame 2, the second square frame 3 and the top mold shell 4, the bottom mold shell 1, the first square frame 2, the second square frame 3 and the top mold shell 4 all comprise a square frame composed of four square plates connected end to end, the bottom mold shell 1 is composed of the square frame and a bottom plate fixed to the lower side wall of the square frame, the top mold shell 4 is composed of the square frame, a cover plate fixed to the upper side wall of the square frame and a pouring ladle fixed to the upper side wall of the cover plate, the mold is used to fill the sand in the bottom mold shell 1, the first square frame 2, the second square frame 3 and the top mold shell 4, the sand in the bottom mold shell 1 and the first square frame 2 is provided with corresponding partial propeller forming cavity structures, the sand in the second square frame 3 and the top mold shell 4 is provided with corresponding partial pouring gate structures, the bottom mold shell 1, the first square frame 2, the second square frame 3 and the top mold shell 4 are stacked together from bottom to top by using the hoisting equipment, the bottom mold shell 1, the first square frame 2, the second square frame 3 and the top mold shell 4 form a cuboid box, the sand in the bottom mold shell 1, the first square frame 2, the second square frame 3 and the top mold shell 4 is stacked together, the partial propeller forming cavity structures in the two lower sands form a complete propeller forming cavity, the partial pouring gate structures in the two upper sands form a complete pouring gate, one end of the pouring gate is connected to the inside of the propeller forming cavity, the pouring ladle on the top mold shell 4 is connected to the other end of the pouring gate, the molten material is poured into the propeller forming cavity from the pouring ladle and the pouring gate, the molten material is solidified in the propeller forming cavity to form a propeller, the casting of the propeller is completed, the multi-layer mold composed of the bottom mold shell 1, the first square frame 2, the second square frame 3 and the top mold shell 4 is used to cast the propeller, the multi-layer mold can be divided into independent bottom mold shell 1, first square frame 2, second square frame 3 and top mold shell 4 when the multi-layer mold is idle, the bottom mold shell 1, the first square frame 2, the second square frame 3 and the top mold shell 4 are stored separately to save the storage space of the production workshop.

[0023] When the propeller is cast by using the multi-layer mold composed of the bottom mold shell 1, the first square frame 2, the second square frame 3 and the top mold shell 4, the bottom mold shell 1, the first square frame 2, the second square frame 3 and the top mold shell 4 need to be aligned up and down, so that the part propeller forming cavity structure in the two sand located below forms a complete propeller forming cavity, and the part pouring gate structure in the two sand located above forms a complete pouring gate, thereby ensuring the casting quality of the propeller. In order to ensure that the bottom mold shell 1, the first square frame 2, the second square frame 3 and the top mold shell 4 are aligned up and down, the alignment mechanism 5 is arranged on the first square frame 2, the second square frame 3 and the top mold shell 4. The alignment mechanism 5 includes a plurality of rotating plates 51 rotatably arranged around the square frame. The rotating plate 51 and the square frame are rotatably connected at a position close to the bottom end of the square frame. A rotating assembly for driving the plurality of rotating plates 51 to rotate synchronously is arranged on the square frame. When the rotating plate 51 is rotated to a vertical state, the lower end of the rotating plate 51 is in contact with the adjacent square frame sidewall located below. At this time, the plurality of rotating plates 51 restrict the relative movement between the adjacent two square frames, thereby ensuring that the bottom mold shell 1, the first square frame 2, the second square frame 3 and the top mold shell 4 are aligned up and down, and the casting quality of the propeller is ensured.

[0024] The structure of the rotating assembly is refined as follows: Figure 3 and Figure 4 The rotating assembly includes four worms 53 rotatably arranged on the four sides of the square frame. The worm 53 is located on the upper side of the rotating plate 51. The side of the rotating plate 51 away from the square frame is fixedly provided with a worm wheel 52. The connection between the worm wheel 52 and the rotating plate 51 and the square frame is coaxially arranged. The plurality of worm wheels 52 are respectively engaged with the four worms 53. The rotating assembly further includes bevel gears 54 coaxially fixedly arranged at both ends of the worm 53. The end portions of the adjacent two worms 53 are arranged close to each other. The adjacent two bevel gears 54 are engaged. One end of one of the worms 53 is coaxially fixedly provided with an extension rod 55. The extension rod 55 is coaxially fixedly provided with a knob. When the operator holds the knob and twists the extension rod 55, the extension rod 55 drives one of the worms 53 to rotate. The two bevel gears 54 on the worm 53 rotate synchronously. Through the engagement transmission of the adjacent two bevel gears 54, the corresponding bevel gear 54 drives the remaining three worms 53 to rotate synchronously, so that the four worms 53 rotate synchronously. Through the engagement transmission of the worm 53 and the worm wheel 52, the plurality of worm wheels 52 drive the corresponding rotating plates 51 to rotate synchronously. The lifting rod 6 is located on the upper side of the worm 53 to avoid the lifting rod 6 hindering the rotation of the rotating plate 51. When the plurality of rotating plates 51 are rotated to the vertical state, the lower end of the rotating plate 51 is in contact with the adjacent square frame sidewall located below. At this time, the plurality of rotating plates 51 restrict the relative movement between the adjacent two square frames, thereby ensuring the casting quality of the propeller. Figure 1

[0025] ​When the multi-layer mold is in an idle state, the operator first drives a plurality of rotating plates 51 to rotate to a horizontal state by rotating the assembly, so that the rotating plates 51 are located on the upper side of the lower side wall of the corresponding square frame, and then uses hoisting equipment to hoist and separate the bottom mold shell 1, the first square frame 2, the second square frame 3 and the top mold shell 4 and then transfer them to a predetermined storage space, and the bottom mold shell 1, the first square frame 2, the second square frame 3 and the top mold shell 4 in the storage space are placed with the lower side wall touching the ground, and the rotating plates 51 are prevented from touching the ground by rotating the rotating plates 51 to the horizontal state, so that the rotating plates 51 will not bear the pressure of the single-layer mold, prolonging the service life of the rotating plates 51 and ensuring the stable storage of the bottom mold shell 1, the first square frame 2, the second square frame 3 and the top mold shell 4.

[0026] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the utility model and are not intended to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-layer mold for propeller sand casting comprising a bottom mold shell (1), characterized in that: The upper side of the bottom mold shell (1) is sequentially provided with a first square frame (2), a second square frame (3) and a top mold shell (4) from bottom to top, the bottom mold shell (1), the first square frame (2), the second square frame (3) and the top mold shell (4) all comprise a square frame composed of four square plates connected end to end, and the bottom mold shell (1) is composed of the square frame and a bottom plate fixed to the lower side wall of the square frame, the top mold shell (4) is composed of the square frame, a cover plate fixed to the upper side wall of the square frame and a casting bucket fixed to the upper side wall of the cover plate, the first square frame (2), the second square frame (3) and the top mold shell (4) are all provided with an alignment mechanism (5), the alignment mechanism (5) comprises a plurality of rotating plates (51) rotatably arranged around the square frame, the position at which the rotating plate (51) and the square frame are rotatably connected is close to the bottom end of the square frame, and the square frame is provided with a rotating assembly for driving the plurality of rotating plates (51) to rotate synchronously, when the rotating plate (51) is rotated to a vertical state, the lower end of the rotating plate (51) is in contact with the adjacent square frame side wall located below.

2. The multi-layer mold for propeller sand casting according to claim 1, characterized in that: The rotating assembly comprises four worms (53) rotatably arranged on four side faces of the square frame respectively, the end portions of the two adjacent worms (53) are arranged close to each other, the worm (53) is located on the upper side of the rotating plate (51), the side of the rotating plate (51) away from the square frame is fixedly provided with a worm wheel (52), the connection position of the worm wheel (52) with the rotating plate (51) and the square frame is coaxially arranged, and the plurality of worm wheels (52) are engaged with the four worms (53) respectively.

3. The multi-layer mold for propeller sand casting according to claim 2, characterized in that: The rotating assembly further comprises bevel gears (54) coaxially fixed at both ends of the worm (53), the two adjacent bevel gears (54) are engaged, and one end of the worm (53) is coaxially fixedly provided with an extension rod (55), and the extension rod (55) is coaxially fixedly provided with a knob.

4. The multi-layer mold for propeller sand casting according to claim 1, characterized in that: When the rotating assembly drives the rotating plate (51) to rotate to a horizontal state, the rotating plate (51) is located on the upper side of the corresponding square frame lower side wall.

5. The multi-layer mold for sand casting of propellers according to claim 2, characterized in that: Two lifting rods (6) are symmetrically and fixedly arranged on the opposite sides of the bottom mold shell (1), the first square frame (2), the second square frame (3) and the top mold shell (4), and the lifting rod (6) is located on the upper side of the worm (53).

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