Tandem disc type extruder

Abstract

The utility model relates to the technical field of tandem disc screw extruders, and discloses a tandem disc extruder which comprises a driving component, a transmission component in transmission connection with the driving component, and a main body in transmission connection with the transmission component, the main body comprises a millstone structure; the millstone structure at least comprises a millstone assembly. The grinding disc assembly comprises a movable piece arranged on the mandrel in a sleeving mode, a first static piece fixed to the inner wall of the barrel and arranged outside the movable piece in a sleeving mode, a second static piece fixed to the inner wall of the barrel and arranged close to the first static piece, and a second screw arranged outside the mandrel in a sleeving mode and corresponding to the second static piece. Static piece grinding grooves are formed in the left side walls and the right side walls of the first static piece and the second static piece correspondingly, movable piece grinding grooves are formed in the left side wall and the right side wall of the movable piece correspondingly, and a spiral groove is formed in the circumferential face of the movable piece. According to the utility model, the millstone structure consisting of the movable sheet and the static sheet is arranged in the cylinder body, and the milling grooves on the movable sheet and the static sheet are matched with each other, so that materials are mixed, stirred and dispersed more uniformly.

Description

TECHNICAL FIELD

[0001] The utility model relates to series connection formula grinding disc screw extruder technical field, concretely relates to a series connection disc type extruder. BACKGROUND

[0002] The series connection disc type extrusion granulator is a composite equipment combining extrusion process and disc type granulation technology, and is mainly used for continuous production of high polymer materials, chemical fillers and organic fertilizers. The core design realizes the mixing, plasticizing, molding and granulation of materials through a multi-stage series connection structure, and has high efficiency and flexibility. The mixing process of the material is mainly dependent on the grinding disc part, but the grinding disc part of the existing series connection disc type extruder has a single structure and relies on the extrusion effect between the grinding discs to process the material. For example, the grinding disc structure of the Chinese utility model patent with the document number CN105729756A and the name of series connection formula grinding disc screw extruder. This grinding disc structure is not good enough for mixing, stretching, uniform dispersion and other effects, especially for the processing effect of nano-level superfine calcium powder, flaky molecular structure powder and flame-retardant aramid material. Therefore, a series connection disc type extruder is needed to mix and stir the material more uniformly. SUMMARY

[0003] The utility model discloses the purpose is: overcome the deficiency in the prior art, provide a series connection disc type extruder, through setting up the grinding disc structure that comprises the moving piece and the static piece in the cylinder, through the mutual cooperation of the grinding groove on the moving piece and the static piece, make the material mixing stirring, disperse more evenly.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a series connection disc type extruder, including drive component, with the transmission assembly of drive component transmission connection, with the main part of transmission assembly transmission connection;

[0005] The main part includes a cylinder, a core shaft transversely arranged in the cylinder, a material conveying structure, a grinding disc structure and a conveying output structure arranged in the cylinder from right to left in sequence;

[0006] The grinding disc structure includes at least three groups of grinding disc assemblies arranged on the core shaft in sequence;The grinding disc assembly includes a moving piece sleeved on the core shaft, a first static piece fixed on the inner wall of the cylinder and sleeved on the outside of the moving piece, a second static piece fixed on the inner wall of the cylinder and arranged close to the first static piece, and a second screw rod sleeved on the outside of the core shaft and corresponding to the second static piece;

[0007] The inner ring of the first static piece and the outer ring of the moving piece are provided with a spacing, and the moving piece and the side wall of the second static piece are left with a gap, and the second static piece and the second screw rod are left with a gap;

[0008] The left side wall and the right side wall of the first static sheet and the second static sheet are provided with static sheet grinding grooves, the left side wall and the right side wall of the dynamic sheet are provided with dynamic sheet grinding grooves, and the circumferential surface of the dynamic sheet is provided with a spiral groove.

[0009] Further, the driving component adopts a motor, and the motor, the transmission assembly and the main body are all mounted on the working frame.

[0010] Further, the thickness of the dynamic sheet is smaller than the thickness of the first static sheet, and the thickness of the second screw rod is greater than the thickness of the second static sheet.

[0011] Further, the inner ring of the first static sheet and the second static sheet is sequentially provided with a second grinding groove in the circumferential direction; one end of the static sheet grinding groove protrudes to the inside of the first static sheet and the second static sheet, and one end of the dynamic sheet grinding groove protrudes to the outside of the dynamic sheet.

[0012] Further, the material conveying structure comprises a material conveying screw rod fixedly sleeved outside the mandrel; the mandrel is sleeved with a third screw rod located at the left end of the grinding disc structure; and the conveying output structure comprises a small screw rod fixedly sleeved outside the mandrel.

[0013] Further, the material conveying structure further comprises a feeding port formed on the barrel body and corresponding to the material conveying screw rod, and a feeding pipe fixedly and communicatively connected with the feeding port is mounted on the outside of the barrel body.

[0014] Further, the barrel body is provided with an exhaust barrel corresponding to the third screw rod; the right end of the main body is provided with a connecting portion connected with the transmission assembly; and the barrel body further comprises a machine head located at the left end of the mandrel, a die head is fixedly mounted at the left end of the machine head, and a heating assembly is arranged on the outside of the barrel body.

[0015] The beneficial effects of the utility model are as follows: the grinding disc structure composed of the dynamic sheet and the static sheet is arranged in the barrel body, the dynamic sheet and the static sheet are matched with each other through the grinding grooves, the material is extruded, reversed, turbulent and stretched between the dynamic sheet and the static sheet, the material is mixed and stirred, and the dispersion is more uniform. Especially for the nanometer ultra-fine calcium powder and the powder with a flaky molecular structure, the series disc type extruding granulator designed for the flame-retardant aramid material can take into account the advantages of the traditional internal mixer and the double-screw extruder, the material is extruded, reversed, turbulent and stretched between the three or more dynamic and static discs, the material is mixed and stirred, and the dispersion is more uniform, the water channel is designed in the static disc, the granulation temperature can be accurately controlled, the material is not denatured, the overall length of the extruder is very short, and the total machine power is small. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a main body sectional structure schematic view;

[0017] Figure 2 It is an overall structure schematic view;

[0018] Figure 3 This is a schematic diagram of the static plate structure;

[0019] Figure 4 This is a schematic diagram of the moving piece structure.

[0020] In the diagram: 1. Working frame; 2. Motor; 3. Transmission assembly; 4. Main body; 5. Feed pipe; 6. Feed inlet; 7. Connecting part; 8. Cylinder; 9. Heating assembly; 10. Mandrel; 11. Feeding screw; 12. First stationary plate; 1201. Stationary plate grinding groove; 13. Second stationary plate; 14. Moving plate; 1401. Moving plate grinding groove; 1402. Spiral groove; 15. Second screw; 16. Third screw; 17. Small screw; 18. Exhaust pipe; 19. Machine head; 20. Die; 21. Cooling water pipe. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings and specific 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model, and are not intended to limit this utility model.

[0023] Example:

[0024] like Figures 1-4 As shown, a tandem disc extruder includes a drive component, a transmission assembly 3 that is driven by the drive component, and a main body 4 that is driven by the transmission assembly 3.

[0025] The main body 4 includes a cylinder 8, a spindle 10 arranged horizontally inside the cylinder 8, and a material conveying structure, a grinding disc structure, and a conveying output structure arranged sequentially from right to left inside the cylinder 8.

[0026] The grinding disc structure includes a movable plate 14 sleeved on the spindle 10, a first stationary plate 12 fixed to the inner wall of the cylinder 8 and sleeved outside the movable plate 14, and a second stationary plate 13 fixed to the inner wall of the cylinder 8 and disposed close to the first stationary plate 12.

[0027] The second static sheet 13 is provided with a second screw rod 15 outside the fixed sleeve of the core shaft 10; the inner ring of the first static sheet 12 and the outer ring of the dynamic sheet 14 are provided with a spacing, the dynamic sheet 14 and the side wall of the second static sheet 13 are provided with a gap, and the second static sheet 13 and the second screw rod 15 are provided with a gap; the inner ring diameter of the second static sheet 13 is smaller than the outer ring diameter of the dynamic sheet 14; one first static sheet 12, one dynamic sheet 14, one second static sheet 13 and one second screw rod 15 arranged in sequence from right to left are a group of mill disc assemblies, and the mill disc structure comprises at least three groups of mill disc assemblies arranged in sequence on the core shaft 10; the dynamic sheet 14 corresponds to the first static sheet 12, and the second static sheet 13 corresponds to the second screw rod 15;

[0028] The left side wall and the right side wall of the first static sheet 12 and the second static sheet 13 are provided with static sheet grinding grooves 1201, the left side wall and the right side wall of the dynamic sheet 14 are provided with dynamic sheet grinding grooves 1401, the circumferential surface of the dynamic sheet 14 is provided with a spiral groove 1402, the spiral groove 1402 corresponds to the inner ring of the first static sheet 12, the dynamic sheet grinding groove 1401 corresponds to the static sheet grinding groove 1201; the size and depth of the static sheet grinding groove 1201 and the dynamic sheet grinding groove 1401 are different to correspond to different grinding particle requirements; the combination of the dynamic sheet and the static sheet and the mutual cooperation of the static sheet grinding groove 1201 and the dynamic sheet grinding groove 1401 can achieve good mixing, stirring and dispersion effects of the material; the left and right directions in the application are relative to the Figure 1

[0029] The driving component adopts a motor 2, the motor 2, the transmission assembly 3 and the main body 4 are all installed on the working frame 1.

[0030] The thickness of the dynamic sheet 14 is smaller than the thickness of the first static sheet 12, and the thickness of the second screw rod 15 is greater than the thickness of the second static sheet 13.

[0031] The inner rings of the first static sheet 12 and the second static sheet 13 are sequentially provided with second grinding grooves in the circumferential direction; one end of the static sheet grinding groove 1201 protrudes into the inner ring of the first static sheet 12 and the second static sheet 13, and the end is in an open shape; one end of the dynamic sheet grinding groove 1401 protrudes to the outside of the outer ring of the dynamic sheet 14, and the end is in an open shape. That is, the static sheet grinding groove 1201 is arranged from the inside of the first static sheet 12 and the second static sheet 13 to the outer ring direction, and the dynamic sheet grinding groove 1401 is arranged from the outer ring to the inner ring direction. Most of the open ends of the dynamic sheet grinding groove 1401 are communicated with the spiral groove 1402; the three side surfaces of the static sheet grinding groove 1201 are all arc surfaces and are smoothly connected with the bottom surface; the side surface of the other end of the dynamic sheet groove 1401 is an arc cross section, which is generally semicircular.

[0032] The material conveying structure comprises a material conveying screw rod 11 fixedly sleeved outside the core shaft 10; the core shaft 10 is externally sleeved with a third screw rod 16 located at the left end of the mill disc structure; the conveying output structure comprises a small screw rod 17 fixedly sleeved outside the core shaft 10.

[0033] ​The feeding structure further comprises a feeding port 6 formed on the barrel 8 corresponding to the feeding screw 11, and a feeding pipe 5 fixedly connected with the feeding port 6 is arranged outside the barrel 8.

[0034] The barrel 8 is provided with an exhaust cylinder 18 corresponding to the third screw 16; the right end of the main body 4 is provided with a connecting portion 7 connected with the transmission assembly 3; the barrel 8 further comprises a head 19 arranged at the left end of the mandrel 10, and a die 20 is fixedly arranged at the left end of the head 19; a heating assembly 9 is arranged outside the barrel 8, and the heating assembly 9 adopts electromagnetic induction heating; a cooling water pipe 21 is fixedly arranged on the barrel 8 and is in communication with an internal water channel, and is used for heat exchange and cooling of the static sheet; a common cooling means is arranged at the output, and the water channel can adopt a conventional copper pipe in contact with the static sheet.

[0035] By arranging the grinding disc structure composed of the moving sheet and the static sheet in the barrel, the material is extruded, reversed, turbulent, stretched and the like between the moving sheet and the static sheet through the mutual cooperation of the grinding grooves on the moving sheet and the static sheet, so that the material is mixed and stirred and is more uniformly dispersed. Especially for the nanoscale ultrafine calcium powder and the powder with a flaky molecular structure, the series disc type extrusion granulator designed for the flame-retardant aramid material can take into account the advantages of the traditional internal mixer and the double-screw extruder, the material is extruded, reversed, turbulent and stretched between the three or more moving and static discs, so that the material is mixed and stirred and is more uniformly dispersed, the water channel is designed in the static disc, the granulation temperature can be accurately controlled, the material is not denatured, the overall length of the extruder is very short, and the total machine power is small.

[0036] Compared with the ordinary double-screw extruder, the filling ratio of the series disc type extruder for nanoscale ultrafine calcium powder and polyethylene mixing can reach 87%, and the maximum filling ratio of the ordinary double-screw extruder is 81%.

[0037] The particles extruded by the two kinds of extruders are subjected to a film blowing experiment, the particles extruded by the series disc type extruder are blown into the stone paper with more uniform light transmission and no obvious patches; and the particles extruded by the ordinary double-screw extruder often have irregular patches caused by the inconsistent light shielding rate due to the uneven dispersion of calcium powder.

[0038] The above merely serves to illustrate the technical scheme of the utility model and is not limited thereto, and other modifications or equivalent replacements to the technical scheme of the utility model made by those skilled in the art shall be encompassed in the scope of the claims of the utility model.

Claims

1. A tandem disc extruder characterized by: The drive component is connected with a transmission assembly (3), and the transmission assembly (3) is connected with a main body (4); The main body (4) comprises a barrel (8) and a mandrel (10) arranged transversely in the barrel (8), and a material conveying structure, a grinding disc structure and a conveying output structure are sequentially arranged from right to left in the barrel (8); The grinding disc structure comprises at least three groups of grinding disc assemblies sequentially arranged on the mandrel (10); each grinding disc assembly comprises a moving sheet (14) sleeved on the mandrel (10), a first static sheet (12) fixed on the inner wall of the barrel (8) and sleeved on the outside of the moving sheet (14), a second static sheet (13) fixed on the inner wall of the barrel (8) and arranged close to the first static sheet (12), and a second screw rod (15) sleeved on the outside of the mandrel (10) and corresponding to the second static sheet (13); A gap is left between the moving sheet (14) and the side wall of the second static sheet (13), and a gap is left between the second static sheet (13) and the second screw rod (15); The left and right side walls of the first static sheet (12) and the second static sheet (13) are provided with static sheet grinding grooves (1201), the left and right side walls of the moving sheet (14) are provided with moving sheet grinding grooves (1401), and a helical groove (1402) is formed on the circumferential surface of the moving sheet (14).

2. A tandem disc extruder as claimed in claim 1, wherein: The drive component is a motor (2), and the motor (2), the transmission assembly (3) and the main body (4) are all mounted on a working frame (1).

3. A tandem disc extruder as claimed in claim 1, wherein: The thickness of the moving sheet (14) is less than the thickness of the first static sheet (12), and the thickness of the second screw rod (15) is greater than the thickness of the second static sheet (13).

4. A tandem-disc extruder as defined in claim 1, wherein: The inner circles of the first static sheet (12) and the second static sheet (13) are sequentially provided with second grinding grooves in the circumferential direction; one end of the static sheet grinding groove (1201) protrudes into the first static sheet (12) and the second static sheet (13), and one end of the moving sheet grinding groove (1401) protrudes out of the moving sheet (14).

5. A tandem-disc extruder as defined in claim 1, wherein: The material conveying structure comprises a material conveying screw rod (11) fixedly sleeved on the outside of the mandrel (10); the outside of the mandrel (10) is sleeved with a third screw rod (16) located at the left end of the grinding disc structure; and the conveying output structure comprises a small screw rod (17) fixedly sleeved on the outside of the mandrel (10).

6. A tandem-disc extruder according to claim 5, characterized in that: The material conveying structure further comprises a feeding port (6) formed on the barrel (8) and corresponding to the material conveying screw rod (11), and a feeding pipe (5) fixedly installed on the outside of the barrel (8) and fixedly communicated with the feeding port (6).

7. A tandem-disc extruder as defined in claim 1, wherein: The barrel (8) is provided with an exhaust barrel (18) corresponding to the third screw rod (16), the right end of the main body (4) is provided with a connecting portion (7) connected with the transmission assembly (3), the barrel (8) further comprises a machine head (19) located at the left end of the mandrel (10), a die (20) is fixedly installed at the left end of the machine head (19), and a heating assembly (9) is arranged on the outside of the barrel (8).

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