Fish and shrimp feed production granulator flat die

Abstract

The utility model provides a flat die of a fish and shrimp feed production granulator. The flat die effectively solves the problems that an existing integrally-manufactured flat die is prone to local deformation or cracking during extrusion, and the rejection rate is high. According to the technical scheme, the flat die comprises a main body of the flat die, and the main body is of a disc structure formed by splicing and assembling a plurality of sector plates; annular protrusions are arranged on the upper end face and the lower end face of the middle of the body, the outer circle faces of the annular protrusions are conical faces, a center shaft is arranged below the body, a conical pit is formed in the upper end of the center shaft, a plurality of vertical screws are arranged in the pit, a cap is arranged on the upper side of the body and buckled on the annular protrusions on the upper side, the upper ends of the screws penetrate through the cap, and compression nuts are screwed at the upper ends of the screws. The split type flat die is ingenious in structure, through the split type design, stress concentration can be prevented in the extrusion process of the flat die, local deformation is effectively prevented, even if local defects occur, rapid maintenance can be achieved by replacing assemblies, the resource utilization rate is increased, and resource waste is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fish and shrimp feed production and granulation, in particular to a flat die for a fish and shrimp feed production granulator. Background Art

[0002] During the production of feed, an extrusion die is required to extrude the fish and shrimp feed into shape. While most existing extrusion dies are well-developed, due to the high pressure of biomass pellet molding and the considerable die pressure, ordinary alloy dies are prone to cracking during operation. For example, the fish and shrimp feed extrusion die disclosed in patent document CN218489188U generally uses an integrated flat die. This generates a large amount of heat during extrusion, which can easily cause stress concentration in the flat die. Microscopic cracks can develop into macroscopic cracks and rapidly expand to fracture. Once a flat die has a defect, it essentially needs to be replaced as a whole, resulting in a waste of resources. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the existing technology, the utility model provides a flat die for a fish and shrimp feed production pellet machine, which effectively solves the problem that the existing one-piece flat die is prone to local deformation or cracking during extrusion and has a high scrap rate.

[0004] The technical solution is to include a main body of a flat mold, which is a disc structure assembled by splicing multiple fan-shaped plates; there are annular protrusions on the upper and lower end surfaces of the middle part of the main body, and the outer cylindrical surface of the annular protrusion is a conical surface. There is a central axis coaxial with it below the main body, and a conical pit corresponding to the annular protrusion at the upper end of the central axis. There are multiple vertical screws in the pit, and a cap is provided on the upper side of the main body, which is buckled on the annular protrusion on the upper side, and the upper end of the screw passes through the cap, and a locking nut is screwed on the upper end of the screw.

[0005] Furthermore, the end portion and the outer side wall of the annular protrusion are covered with a high temperature resistant cushion layer.

[0006] Furthermore, the inner side wall of the cap is tapered.

[0007] Furthermore, key slots are provided on the side walls of the recess, the outer side walls of the annular protrusion and the inner side walls of the cap, and the main body, the cap and the recess are all connected by keys.

[0008] Furthermore, a plurality of nuts are screwed on the upper end of each screw.

[0009] The utility model has an ingenious structure. Through the split design, the flat die can prevent stress concentration during the extrusion process and effectively prevent local deformation. Even if local defects occur, they can be quickly repaired by replacing components, thereby improving resource utilization and reducing resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is the front view of the utility model.

[0011] Figure 2 It is the three-dimensional integral schematic view of the utility model.

[0012] Figure 3 It is the three-dimensional explosion view of the utility model. DETAILED DESCRIPTION

[0013] The specific embodiments of the utility model are further explained in detail below in combination with the drawings.

[0014] By Figures 1 to 3 The utility model discloses a flat die, which comprises a main body 1, the main body 1 is a disc structure assembled by a plurality of sector plates, and annular protrusions 2 are arranged on the upper and lower end faces of the middle part of the main body 1; the outer circumferential surface of the annular protrusion 2 is a conical surface, a central shaft 3 coaxial with the main body 1 is arranged below the main body 1, a conical pit 4 corresponding to the annular protrusion 2 is arranged on the upper end of the central shaft 3, a plurality of vertical screw rods 5 are arranged in the pit 4, a cap 6 is arranged on the upper side of the main body 1, the cap 6 is buckled on the upper annular protrusion 2, the upper ends of the screw rods 5 penetrate through the cap 6, and compression nuts 7 are screwed on the upper ends of the screw rods 5.

[0015] In order to prevent the central shaft 3 from slipping with the main body 1, a high-temperature-resistant pad layer is covered on the end and the outer side wall of the annular protrusion 2.

[0016] The inner side wall of the cap 6 is conical.

[0017] In order to further prevent the main body 1 from slipping with the rotating shaft, key grooves are arranged on the side wall of the pit 4, the outer side wall of the annular protrusion 2 and the inner side wall of the cap 6, and the main body 1 is connected with the cap 6 and the pit 4 in a key connection mode.

[0018] In order to prevent the nuts 7 from loosening, a plurality of nuts 7 are screwed on the upper end of each screw rod 5.

[0019] It is worth noting that the main body 1 is divided into a plurality of sector plates in the scheme, so that the heat dissipation efficiency can be greatly improved, and stress concentration can be reduced.

[0020] In addition to the key connection, many anti-slip modes can be adopted in the linking mode of the annular protrusion 2, the cap 6 and the pit 4, for example, the outer circumferential surface of the annular protrusion 2 is arranged in the form of a bevel gear, and the inner side wall of the cap 6 and the pit 4 is arranged in the form of tooth engagement with the bevel gear, so that the transmission reliability between the main body 1 and the central shaft 3 can be improved.

[0021] In use, the central shaft 3 in the device is connected with a power shaft of a granulator, the power shaft drives the structure to rotate through the central shaft 3, and in the rotation, the material is extruded downwards and then cut to form particles; when a part of the main body 1 is damaged, the device is disassembled, then the compression nut 7 is screwed and the cap 6 is disassembled, at this time, the damaged sector plate is replaced with a new sector plate, and all components are restored to the original state, at this time, the maintenance is completed, and the feed granules can continue to be processed.

[0022] The utility model discloses a clever structure, through split type design, make the flat die in extrusion process can prevent stress concentration, effectively prevent local deformation, even if local appearance defect also can realize quick maintenance through replacement component, improve resource utilization, reduce resource waste.

Claims

1. A flat die for a pellet machine for producing fish and shrimp feed, characterized in that: The main body (1) comprises a flat die, wherein the main body (1) is a disc structure formed by splicing and assembling a plurality of fan-shaped plates; annular protrusions (2) are provided on the upper and lower end surfaces of the middle portion of the main body (1); the outer cylindrical surface of the annular protrusion (2) is a conical surface; a central axis (3) coaxial with the main body (1) is provided below the main body (1); a conical pit (4) corresponding to the annular protrusion (2) is provided at the upper end of the central axis (3); a plurality of vertical screws (5) are provided in the pit (4); a cap (6) is provided on the upper side of the main body (1); the cap (6) is buckled on the annular protrusion (2) on the upper side; the upper end of the screw (5) passes through the cap (6); and a compression nut (7) is screwed on the upper end of the screw (5).

2. The flat die of a pellet machine for producing fish and shrimp feed according to claim 1, characterized in that: The end portion and the outer side wall of the annular protrusion (2) are covered with a high-temperature resistant cushion layer.

3. The flat die of a pellet machine for producing fish and shrimp feed according to claim 1, characterized in that: The inner side wall of the cap (6) is conical.

4. A flat die for producing pellet machine for fish and shrimp feed according to claim 2 or 3, characterized in that: Keyways are provided on the side walls of the recess (4), the outer side walls of the annular protrusion (2), and the inner side walls of the cover cap (6), and the main body (1), the cover cap (6), and the recess (4) are all connected by keys.

5. A flat die for producing pellet machine for fish and shrimp feed according to claim 2 or 3, characterized in that: A plurality of nuts (7) are screwed onto the upper end of each screw rod (5).

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