Double-screw extruder structure

Abstract

The utility model provides a double-screw extruder structure which comprises a rack, a machine shell is arranged at the upper end of the rack, a cavity is formed in the machine shell, a pair of extrusion screws meshed with each other are arranged in the cavity, a motor for driving the extrusion screws to rotate is connected to the tails of the extrusion screws, an extrusion die is arranged at the other ends of the extrusion screws, and the machine shell comprises an upper shell body and a lower shell body. One side of the upper shell and one side of the lower shell are each provided with a hinge, the upper shell and the lower shell are hinged through the hinges, the lower shell is fixedly arranged on the rack, the other side of the upper shell and the other side of the lower shell are each provided with a fixing plate, and the two fixing plates are fixed through a fastener after being attached to each other. The upper shell and the lower shell are hinged, so that when the screws are overhauled, the two screws do not need to be dismantled and then checked, the overhauling precision is improved, meanwhile, the abrasion condition of the screws is conveniently observed, and the screws are convenient to dismantle, install and overhaul.

Description

TECHNICAL FIELD

[0001] The utility model relates to an extruder especially relates to a double screw extruder structure. BACKGROUND

[0002] At present, the Chinese patent with the announcement number CN216466084U discloses a double screw extruder, which comprises a bottom plate and a shell located above the bottom plate, two cavities in communication with each other are arranged inside the shell, mutually matched screw rods are arranged in the cavities, a motor is arranged on one side of the screw rod to drive the rotation of the screw rod, a connecting sleeve is arranged at the other end, and a plurality of push plates are arranged in an annular array on the connecting sleeve, the push plates are used to solve the problem of material accumulation at the discharge port.

[0003] The above-mentioned patent still has some shortcomings, the screw rod will be worn after the extruder is used for a period of time, especially in the raw material feeding area and the auxiliary material feeding area, the solid particles will cause abrasive wear after rubbing against the metal surface, the liquid auxiliary material entering from the auxiliary material area is prone to corrosion and wear of the metal surface, therefore, the screw rod needs to be repaired or replaced after the extruder is used for a period of time, and the above-mentioned extruder needs to separate the shell from the screw rod when the screw rod is overhauled, which is relatively troublesome during installation and disassembly. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims to provide a double screw extruder structure which has the advantages of convenient overhauling of the screw rod.

[0005] In order to solve the above-mentioned technical problems, the technical scheme of the utility model is as follows: a double screw extruder structure, which comprises a rack, a shell is arranged at the upper end of the rack, a cavity is formed in the shell, a pair of intermeshing extrusion screw rods are arranged in the cavity, a motor is connected to the tail of the extrusion screw rod to drive the rotation of the extrusion screw rod, an extrusion die is arranged at the other end of the extrusion screw rod, the shell comprises an upper shell and a lower shell, a hinge is arranged on one side of the upper shell and the lower shell, the upper shell and the lower shell are hinged through the hinge, the lower shell is fixedly arranged on the rack, a fixing plate is arranged on the other side of the upper shell and the lower shell, and the two fixing plates are fixed through fasteners after being attached.

[0006] Through the above technical means, the upper shell and the lower shell are separately manufactured and hinged, so that the two screw rods do not need to be disassembled for inspection when the screw rod is overhauled, the overhauling accuracy is improved, and the wear condition of the screw rod is convenient to observe, which is relatively convenient during disassembly, installation and overhauling of the screw rod.

[0007] Preferably, the extrusion screw rod is composed of a raw material screw rod, an auxiliary material screw rod and an extrusion screw rod which are connected in sequence, and the raw material screw rod, the auxiliary material screw rod and the extrusion screw rod are detachably connected.

[0008] Through the technical means, the detachable connection between the raw material screw, the auxiliary material screw and the extruding screw makes the whole screw not need to be replaced when the easy-wearing part of the screw is worn, thereby reducing the maintenance cost.

[0009] Preferably, one end of the raw material screw is fixed with the motor, and the other end is provided with a connecting head one; both ends of the auxiliary material screw are provided with connecting heads two; one end of the extruding screw is provided with a connecting head three, and the other end abuts against the extruding die; the connecting head one and the connecting head two on one side are fixed through screws; and the connecting head three and the connecting head two on the other side are fixed through screws.

[0010] Through the technical means, the cooperation between the connecting head one, the connecting head two and the connecting head three realizes the quick disassembly and installation of the screw, and increases the maintenance efficiency.

[0011] Preferably, the raw material screw is further provided with a crushing cutter head, and the crushing cutter heads on the two raw material screws crush the raw materials; the auxiliary material screw is provided with a booster thread and a stirring rod; the stirring rod is used for stirring and fusing the raw materials and the auxiliary materials; and the booster thread is used for sending the mixed raw materials into the extruding screw.

[0012] Through the technical means, the crushing cutter head reduces the size of the raw material particles, increases the melting efficiency of the particles, thereby increasing the extruding speed; the stirring rod makes the fusion between the raw materials and the auxiliary materials more uniform; and the booster thread prolongs the residence time of the materials, ensures the sufficient mixing of the materials, improves the pushing capacity, and increases the extruding quality.

[0013] Preferably, the bottom of the shell is further provided with a temperature control system; the upper shell and the lower shell are composed of inner rings and outer rings; a plurality of heating nets are arranged between the inner rings and the outer rings; and the temperature control system is used for supplying power to the heating nets.

[0014] Through the technical means, the plurality of heating nets are arranged, and the temperature control system provides different currents to different heating nets, so that the temperatures at multiple positions in the cavity can be adjusted.

[0015] Preferably, the bottom of the shell is further provided with a temperature control system; the upper shell and the lower shell are composed of a plurality of flow channel blocks and mounting racks; the flow channel blocks are mounted on the mounting racks; flow channel grooves are formed on the two sides of the flow channel blocks; the flow channel grooves form heating flow channels after the two flow channel blocks are combined; and the temperature control system is used for inputting hot fluids into the heating flow channels.

[0016] Through the technical means, the temperature control system controls the hot fluids to flow through the heating flow channels, so that the temperatures at multiple positions in the cavity can be adjusted, and the influence of voltage on the temperature is avoided.

[0017] Compared with the prior art, the utility model has the advantages of

[0018] 1, through the upper shell and lower shell hinge, and through the raw material screw rod, auxiliary material screw rod and extruding screw rod between the detachable connection, so that the equipment in overhaul replacement difficulty reduces at the same time, reduces the replacement cost;

[0019] 2, through the flow channel groove is established in the flow channel block both sides, and through the hot fluid to flow channel block heating, thereby realizing the temperature adjustment of different positions in the cavity, increase extrusion quality. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is structural schematic diagram of example one;

[0021] Figure 2 It is sectional view schematic diagram of example one;

[0022] Figure 3 It is Figure 2 A part schematic diagram of example one;

[0023] Figure 4 It is local schematic diagram of example one;

[0024] Figure 5 It is sectional view schematic diagram of example two.

[0025] Reference signs: 1, rack;2, casing;3, cavity;4, raw material hopper;5, auxiliary material hopper;6, extrusion screw;7, extrusion die;8, upper shell;9, lower shell;10, hinge hinge;11, raw material screw rod;12, auxiliary material screw rod;13, extruding screw;14, connector one;15, connector two;16, connector three;17, countersunk via;18, screw hole;19, positioning hole;20, broken cutter head;21, booster thread;22, stirring rod;23, inner ring;24, outer ring;25, heating net;26, flow channel block;27, mounting frame;28, flow channel groove;29, fixed plate. DETAILED DESCRIPTION

[0026] The specific embodiment of the utility model is further described in detail below in combination with the drawings, so that the technical scheme of the utility model is more easy to understand and master. Example one:

[0027] The utility model provides a kind of double screw extruder structure, including frame 1, frame 1 upper end is provided with casing 2, cavity 3 is opened in casing 2 inside, casing 2 upper end is detachably provided with raw material hopper 4 and auxiliary material hopper 5, raw material hopper 4 and auxiliary material hopper 5 are communicated with cavity 3, a pair of mutually meshing extrusion screw 6 is arranged in cavity 3, relatively fit between screw and cavity 3 inner wall, extrusion screw 6 tail is connected with motor that it rotates, head is provided with extrusion die 7, casing 2 includes upper shell 8 and lower shell 9, upper shell 8 and lower shell 9 one side are provided with hinge hinge 10, upper shell 8 and lower shell 9 are hinged by hinge hinge 10, lower shell 9 is fixedly arranged on frame 1, upper shell 8 and lower shell 9 other side are provided with fixed plate 29, two fixed plates 29 are fit and fixed by screw after being fit and the upper shell 8 and lower shell 9 are locked.

[0028] Extrusion screw 6 is composed of raw material screw 11, auxiliary material screw 12 and extruding screw 13 connected in sequence, raw material screw 11, auxiliary material screw 12, extruding screw 13 are detachably connected, one end of raw material screw 11 is fixed with motor, the other end is provided with connecting head one 14, both ends of auxiliary material screw 12 are provided with connecting head two 15, one end of extruding screw 13 is provided with connecting head three 16, the other end is against extrusion die 7, connecting head one 14, connecting head two 15 and connecting head three 16 are all semicircular, the threaded hole 18 is opened in connecting head two 15, connecting head one 14 and the connecting head two 15 on one side are fixed by screw, connecting head three 16 and the connecting head two 15 on the other side are fixed by screw, the positioning hole 19 is opened in connecting head one 14, connecting head two 15 and connecting head three 16, when installing connecting head one 14, connecting head two 15 and connecting head three 16, first, the position of connecting head is determined through positioning hole 19, then fixed by screw, so that the quick disassembly and installation of screw are realized, and the maintenance efficiency is increased.

[0029] Raw material screw 11 is further provided with crushing cutter head 20, the crushing cutter head 20 on two raw material screws 11 grinds raw materials in cooperation, the crushing cutter head 20 is similar to shredder cutter head, and raw materials are ground by engagement, auxiliary material screw 12 is provided with booster thread 21 and stirring rod 22, the stirring rod 22 is used for stirring and fusing raw materials and auxiliary materials, the booster thread 21 is used for feeding raw materials after mixing into extruding screw 13, by setting booster thread 21, the residence time of materials in this place is prolonged, to ensure that materials are mixed fully, while improving pushing capacity, and increasing extrusion quality.

[0030] The bottom of the shell 2 is further provided with a temperature control system, which is a power supply box, the upper shell 8 and the lower shell 9 are both composed of an inner ring 23 and an outer ring 24, a plurality of heating nets 25 are arranged between the inner ring 23 and the outer ring 24, and the temperature control system is used for supplying power to the heating nets 25, so as to adjust the temperature of the heating nets 25 through electronic equipment such as a current regulator. Embodiment two:

[0031] The difference between embodiment two and embodiment one lies in the temperature control system, the upper shell 8 and the lower shell 9 are both composed of a plurality of flow channel blocks 26 and mounting racks 27, sealing rings are arranged between the flow channel blocks 26, the flow channel blocks 26 are all mounted on the mounting racks 27, flow channel grooves 28 are formed on both sides of the flow channel blocks 26, the flow channel grooves 28 form heating flow channels after the combination of the two flow channel blocks 26, and the temperature control system comprises a plurality of water pumps and heaters, the water pumps are used for inputting heated fluid into the heating flow channels, so as to realize the adjustment of the temperature at multiple positions in the cavity 3 and avoid the influence of voltage on the temperature.

[0032] Of course, the above is only a typical example of the present application, in addition to this, the present application can have other various specific implementation manners, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.

Claims

1. A twin-screw extruder structure, comprising a frame (1), a housing (2) disposed at the upper end of the frame (1), a cavity (3) being provided inside the housing (2), a pair of meshing extrusion screws (6) being disposed inside the cavity (3), a motor for driving the extrusion screws (6) being connected to the tail end of the extrusion screws (6), and an extrusion die (7) being disposed at the other end, characterized in that: The shell (2) comprises an upper shell (8) and a lower shell (9), the upper shell (8) and the lower shell (9) are provided with a hinge (10) on one side, the upper shell (8) and the lower shell (9) are hinged through the hinge (10), the lower shell (9) is fixedly arranged on the rack (1), and the upper shell (8) and the lower shell (9) are provided with a fixed plate (29) on the other side.

2. A twin-screw extruder structure according to claim 1, characterized in that: The extrusion screw (6) is composed of a raw material screw (11), an auxiliary material screw (12) and an extrusion screw (13) connected in sequence, and the raw material screw (11), the auxiliary material screw (12) and the extrusion screw (13) are detachably connected.

3. A twin-screw extruder according to claim 2, characterized in that: One end of the raw material screw (11) is fixed with a motor, and the other end is provided with a connecting head one (14), both ends of the auxiliary material screw (12) are provided with a connecting head two (15), one end of the extrusion screw (13) is provided with a connecting head three (16), and the other end abuts against an extrusion die (7), the connecting head one (14) and the connecting head two (15) on one side are fixed through screws, and the connecting head three (16) and the connecting head two (15) on the other side are fixed through screws.

4. A twin-screw extruder according to claim 3, characterized in that: The raw material screw (11) is further provided with a crushing cutter head (20), the crushing cutter heads (20) on the two raw material screws (11) cooperate to crush the raw materials, the auxiliary material screw (12) is provided with a booster thread (21) and a stirring rod (22), the stirring rod (22) is used for stirring and fusing the raw materials and auxiliary materials, and the booster thread (21) is used for feeding the mixed raw materials into the extrusion screw (13).

5. A twin-screw extruder according to claim 1, characterized in that: The bottom of the shell (2) is further provided with a temperature control system, the upper shell (8) and the lower shell (9) are composed of an inner ring (23) and an outer ring (24), a plurality of heating nets (25) are arranged between the inner ring (23) and the outer ring (24), and the temperature control system is used for power supply of the heating net (25).

6. A twin-screw extruder according to claim 1, characterized in that: The bottom of the shell (2) is further provided with a temperature control system, the upper shell (8) and the lower shell (9) are composed of a plurality of flow channel blocks (26) and mounting frames (27), the flow channel blocks (26) are mounted on the mounting frames (27), flow channel grooves (28) are formed on the two sides of the flow channel blocks (26), and the flow channel grooves (28) form heating flow channels after the two flow channel blocks (26) are combined, and the temperature control system is used for inputting hot fluid into the heating flow channels.

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