A material extrusion device and production steps

Abstract

The present invention relates to the field of plastic processing technology, and proposes a material extrusion device, including an extrusion device, a cooling device and a granulation device arranged in sequence, the granulation device including a frame located on one side of the cooling device; a rotating member is arranged to rotate relative to the frame, and the rotating member has a guide groove and a notch; a cutter is swingably arranged at the notch, and is used to cut off the plastic strip passing through the guide groove after swinging. Through the above technical solution, the problem that the plastic strip is easily skewed during plastic granulation in the prior art, which leads to large differences in size and shape of the cut plastic pellets, is solved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic processing, and in particular to a material extrusion device and a production step. Background Art

[0002] Plastic granulation refers to the process of crushing, cleaning, draining, and granulating plastic materials to turn waste plastics into recyclable plastic granules. The production process of plastic granulation generally includes: raw material classification, cleaning and crushing, washing and dehydration, drying, granulation, screening and other steps.

[0003] In the granulation process, a pelletizer is generally used to granulate the extruded and cooled plastic strips. In the cutting process, only the upper and lower cutters are used to cut the plastic strips. The lack of guidance and limit for the plastic strips makes it easy for the plastic strips to be skewed, which leads to large differences in the size and shape of the cut plastic pellets, affecting product quality. In addition, after long-term use, the pelletizer cutter will adhere to some plastic chips, affecting cutting. If necessary, the machine needs to be stopped for cleaning, affecting processing efficiency. Therefore, improvements are made to solve the above problems. Summary of the invention

[0004] The present invention provides a material extrusion device and production steps, which solves the problem in the related art that plastic strips are easily skewed during plastic granulation, thereby causing large differences in size and shape of cut plastic granules.

[0005] The technical solution of the present invention is as follows:

[0006] A material extrusion device comprises an extrusion device, a cooling device and a granulation device arranged in sequence, wherein the granulation device comprises:

[0007] A rack located on one side of the cooling device;

[0008] A rotating member, rotatably arranged relative to the frame, the rotating member having a guide groove and a notch;

[0009] The first cutter is swingably arranged at the notch and is used to cut off the plastic strip passing through the guide groove after swinging.

[0010] As a further technical solution, the granulation device further comprises:

[0011] Cutter 2 is swingably arranged at the notch, spaced apart from cutter 1, and has a swing direction opposite to that of cutter 1;

[0012] An elastic member, one end of which acts on the first cutter and the other end of which acts on the second cutter, is used to provide a force to move the first cutter and the second cutter away from each other.

[0013] As a further technical solution, the notch includes an opening one and an opening two that are connected to each other, and the cutter one and the cutter two both have a connected cutter part and a swing arm part, the cutter part is located at the opening one, the swing arm part is located at the opening two, and the elastic member acts on the swing arm part.

[0014] As a further technical solution, it also includes two guide members 1, which are respectively arranged on both sides of the rotating member, and the guide member 1 includes:

[0015] A fixed shaft, located at one side of the rotating member;

[0016] The roller is rotatably arranged on the fixed shaft, the cutter portion has an inclined surface, and the roller is used to abut against the inclined surface so that the cutter 1 and the cutter 2 are close to each other.

[0017] As a further technical solution, the granulation device further comprises:

[0018] There are two baffles, which are respectively arranged on both sides of the rotating member and are used to block the swing arm part.

[0019] As a further technical solution, the granulation device further comprises:

[0020] A turntable, rotatably arranged on the frame, the rotating member rotatably arranged on the turntable, the rotating axis of the turntable is parallel to the rotating axis of the rotating member, and a plurality of rotating members are arranged on the turntable at intervals;

[0021] The bracket is arranged on the rotating disk, and the fixed shaft is arranged on the bracket.

[0022] As a further technical solution, the granulation device further comprises two guide members 2, which are respectively arranged at intervals on one side of the two guide members 1.

[0023] As a further technical solution, the rotating member is in a wheel shape.

[0024] As a further technical solution, the guide groove is arc-shaped.

[0025] A production process of material extrusion, using the material extrusion equipment, further comprising the following steps:

[0026] S1, the raw material is formed by an extrusion device;

[0027] S2, then cooled by a cooling device;

[0028] S3, then granulated by a granulating device;

[0029] S4, finally sent into the storage tank through the climbing vibrating screen.

[0030] The working principle and beneficial effects of the present invention are:

[0031] 1. In the present invention, the pelletizing structure is replaced, and a rotating part is used to achieve the traction and pelletizing of the plastic strips. Compared with the existing pelletizing method, the traction and guidance of the plastic strips are strengthened while the cutting is completed, thus avoiding the problem of the plastic strips being skewed and ultimately affecting the quality of the finished product.

[0032] The specific working principle is: the extrusion device adopts the existing extruder, and the cooling device adopts the existing water trough and air-cooled conveyor belt. The plastic raw material is extruded and formed by the extruder, and then enters the water trough for water cooling, and then is conveyed to the air-cooled conveyor belt for air cooling. This part is the existing technology and will not be elaborated in detail. Then it enters the granulation device, and the cooled plastic strip is placed in the guide groove of the rotating part to pull and guide the plastic strip. Then the rotating part rotates. When the inclined surfaces of cutter one and cutter two contact the roller, they will gradually push cutter one and cutter two closer together, and finally cut off the plastic strip. A guide plate can be set below to guide the plastic pellets into the next process. After leaving the roller, under the action of the elastic member, cutter one and cutter two gradually move away from reset, and wait until the next time they rotate to the roller for cutting. The elastic member can be selected from springs, and the width of the pelletizing can be adjusted by adjusting the rotation speed and diameter of the rotating member.

[0033] 2. In the present invention, considering that the spacing between the cutters needs to be adjusted when granulating plastic strips of different sizes, multiple sets of rotating parts are preset on the turntable to facilitate switching for processing plastic strips of different sizes without stopping the machine.

[0034] In addition, two guide members 2 are arranged on the bracket. The structure of the guide member 2 is the same as that of the guide member 1. Its function is to make the blades of the cutter 1 and the cutter 2 overlap, thereby removing the plastic chips attached to each other. A brush driven by an electric push rod can also be arranged to drive the brush for cleaning when the cutter 1 and the cutter 2 pass through the guide member 2. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0036] Figure 1 It is a schematic diagram of the production steps of the present invention;

[0037] Figure 2 It is a schematic diagram of the structure of the granulation device according to the present invention from an angle;

[0038] Figure 3 It is a schematic structural diagram of another angle of the granulation device in the present invention;

[0039] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of the middle part A;

[0040] Figure 5 for Figure 3 The enlarged structural diagram of the middle part B;

[0041] In the figure: 1. extrusion device, 2. cooling device, 3. granulation device, 4. frame, 5. rotating part, 6. guide groove, 7. notch, 8. cutter one, 9. cutter two, 10. elastic part, 11. opening one, 12. opening two, 13. cutter part, 14. swing arm part, 15. fixed shaft, 16. roller, 17. inclined surface, 18. baffle, 19. turntable, 20. bracket, 21. guide part two, 22. climbing vibrating screen, 23. storage tank. DETAILED DESCRIPTION

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0043] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0044] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0046] Example 1

[0047] Reference Figure 1~Figure 4, which is the first embodiment of the present invention, proposes a material extrusion device, comprising an extrusion device 1, a cooling device 2 and a granulating device 3 arranged in sequence, the granulating device 3 comprising a frame 4 located on one side of the cooling device 2; a rotating member 5 is arranged to rotate relative to the frame 4, and the rotating member 5 has a guide groove 6 and a notch 7; a cutter 8 is swingably arranged at the notch 7, and is used to cut off the plastic strip passing through the guide groove 6 after swinging. Further, the granulating device 3 also includes a cutter 2 9 swingably arranged at the notch 7, which is spaced from the cutter 1 8 and is opposite to the swing direction of the cutter 1 8; one end of the elastic member 10 acts on the cutter 1 8, and the other end acts on the cutter 2 9, which is used to provide a force to move the cutter 1 8 and the cutter 2 9 away from each other. Further, the notch 7 includes an opening 11 and an opening 2 12 that are connected, and the cutter 1 8 and the cutter 2 9 both have a connected cutter part 13 and a swing arm part 14, the cutter part 13 is located at the opening 11, the swing arm part 14 is located at the opening 2 12, and the elastic member 10 acts on the swing arm part 14. Further, it also includes two guide members 1, which are respectively arranged on both sides of the rotating member 5. The guide member 1 includes a fixed shaft 15 located on one side of the rotating member 5; a roller 16 is rotatably arranged on the fixed shaft 15, and the cutter part 13 has an inclined surface 17. The roller 16 is used to abut the inclined surface 17 so that the cutter 1 8 and the cutter 2 9 are close to each other. Further, the granulating device 3 also includes two baffles 18 arranged on both sides of the rotating member 5, which are respectively used to block the swing arm part 14. Further, the rotating member 5 is wheel-shaped. Further, the guide groove 6 is arc-shaped.

[0048] In this embodiment, in order to solve the problem in the related art that plastic strips are easily skewed during plastic granulation, which leads to large differences in the size and shape of the cut plastic pellets, the pelletizing structure is replaced, and a rotating part 5 is used to achieve the traction and pelletizing of the plastic strips. Compared with the existing pelletizing method, the traction and guidance of the plastic strips are strengthened while completing the cutting, thereby avoiding the problem of the skew of the plastic strips ultimately affecting the quality of the finished product.

[0049] The specific working principle is as follows: the extrusion device 1 adopts the existing extruder, and the cooling device 2 adopts the existing water trough and air-cooled conveyor belt. The plastic raw material is extruded and formed by the extruder, and then enters the water trough for water cooling, and then is conveyed to the air-cooled conveyor belt for air cooling. This part is the prior art and will not be elaborated on in detail. Then it enters the granulation device 3, and the cooled plastic strip is placed in the guide groove 6 of the rotating member 5 to guide the plastic strip. Then the rotating member 5 rotates. When the inclined surface 17 of the cutter 1 8 and the cutter 2 9 contacts the roller 16, it will gradually push the cutter 1 8 and the cutter 2 9 to gradually approach, and finally cut off the plastic strip. A guide plate can be set below to guide the plastic pellets into the next process. After leaving the roller 16, under the action of the elastic member 10, the cutter 1 8 and the cutter 2 9 gradually move away from the reset, and wait until the next time they rotate to the roller 16 for cutting. The elastic member 10 can use a spring, and the width of the pelletizing can be adjusted by adjusting the rotation speed and diameter of the rotating member 5.

[0050] Example 2

[0051] Reference Figure 4~Figure 5 Compared with the embodiment 1, the granulating device 3 further comprises a turntable 19 rotatably arranged on the frame 4, the rotating member 5 is rotatably arranged on the turntable 19, the rotation axis of the turntable 19 is parallel to the rotation axis of the rotating member 5, and a plurality of rotating members 5 are arranged at intervals on the turntable 19; the bracket 20 is arranged on the turntable 19, and the fixed shaft 15 is arranged on the bracket 20. Further, the granulating device 3 further comprises two guide members 21, which are respectively arranged at intervals on one side of the two guide members 1.

[0052] In this embodiment, considering that the spacing between the cutters needs to be adjusted when granulating plastic strips of different sizes, multiple groups of rotating parts 5 are preset on the turntable 19 to facilitate switching when processing plastic strips of different sizes without stopping the machine.

[0053] In addition, two guide members 21 are provided on the bracket 20. The structure of the guide member 21 is the same as that of the guide member 1. Its function is to make the blades of the cutter 1 8 and the cutter 2 9 overlap, thereby removing the plastic chips attached to each other. A brush driven by an electric push rod can also be provided. When the cutter 1 8 and the cutter 2 9 pass through the guide member 21, the brush is driven to clean them.

[0054] Example 3

[0055] Compared with Example 1, further, a production step of material extrusion is proposed, using a material extrusion device, and further comprising the following steps:

[0056] S1, the raw material is formed by extrusion device 1;

[0057] S2, then cooled by cooling device 2;

[0058] S3, then granulated by granulating device 3;

[0059] S4, finally sent into the storage tank 23 through the climbing vibrating screen 22.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A material extrusion device, comprising an extrusion device (1), a cooling device (2) and a granulation device (3) arranged in sequence, characterized in that: The granulation device (3) comprises: A rack (4) located on one side of the cooling device (2); A rotating member (5) is rotatably arranged relative to the frame (4), and the rotating member (5) has a guide groove (6) and a notch (7); A cutter (8) is swingably disposed at the notch (7) and is used to cut off the plastic strip passing through the guide groove (6) after swinging; Cutter No. 2 (9) is swingably arranged at the notch (7), spaced apart from cutter No. 1 (8), and swinging in the opposite direction to cutter No. 1 (8); an elastic member (10), one end of which acts on the first cutter (8) and the other end of which acts on the second cutter (9), and is used to provide a force to move the first cutter (8) and the second cutter (9) away from each other; The notch (7) comprises an opening 1 (11) and an opening 2 (12) which are in communication with each other; the cutter 1 (8) and the cutter 2 (9) both have a cutter portion (13) and a swing arm portion (14) which are connected with each other; the cutter portion (13) is located at the opening 1 (11); the swing arm portion (14) is located at the opening 2 (12); and the elastic member (10) acts on the swing arm portion (14); Two guide members 1 are respectively arranged on both sides of the rotating member (5), and the guide members 1 include: A fixed shaft (15) located on one side of the rotating member (5); a roller (16) rotatably disposed on the fixed shaft (15); the cutter portion (13) has an inclined surface (17); the roller (16) is used to abut against the inclined surface (17) so that the first cutter (8) and the second cutter (9) are brought closer to each other; a rotating disk (19) rotatably mounted on the frame (4); the rotating member (5) rotatably mounted on the rotating disk (19); the rotating axis of the rotating disk (19) is parallel to the rotating axis of the rotating member (5); and a plurality of rotating members (5) are spaced apart on the rotating disk (19); The bracket (20) is arranged on the rotating disk (19), and the fixed shaft (15) is arranged on the bracket (20).

2. A material extrusion device according to claim 1, characterized in that: The granulation device (3) further comprises: There are two baffles (18), which are respectively arranged on both sides of the rotating member (5) and are used to block the swing arm portion (14).

3. A material extrusion device according to claim 1, characterized in that: The granulation device (3) further comprises two guide members 2 (21), which are arranged at intervals on one side of the two guide members 1.

4. A material extrusion device according to claim 1, characterized in that: The rotating member (5) is in the shape of a wheel.

5. A material extrusion device according to claim 1, characterized in that: The guide groove (6) is arc-shaped.

6. A production method for material extrusion, using a material extrusion device according to claim 1, characterized in that: The following steps are also included: S1, the raw material is formed by the extrusion device (1); S2, then cooling by cooling device (2); S3, then granulated by a granulating device (3); S4. Finally, the material is sent to the storage tank (23) through the climbing vibration screen (22).

Images