Feeding device of plastic extruder and plastic extruder
By introducing a conical buffer support and stirring blades into the feeding device, the problem of uneven and unstable feeding was solved, achieving stable feeding of the plastic extruder and improving product quality.
Patent Information
- Application Number
- CN202423135771.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-18
AI Technical Summary
The feeding device of existing plastic extruders has uneven and unstable material supply, resulting in poor production continuity and poor product quality. In particular, the feeding amount of high-flowability powder materials is unstable under the action of gravity, which can easily lead to problems such as material overflow or material shortage.
The feeding device is equipped with a conical buffer support and stirring blades. The conical buffer support buffers the falling material, and the stirring blades stir the material. Combined with the action of centrifugal force and gravity, the material is evenly dispersed, avoiding gravity compression and achieving uniform and stable feeding.
It achieves uniform and stable feeding, ensuring the continuity of the production process and product quality, avoiding the problem of material increase or decrease in a short period of time, and improving the stability of production and product consistency.
Smart Images
Figure CN223573770U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of plastic extruders, in particular to a feeding device of a plastic extruder and the plastic extruder. BACKGROUND
[0002] In the production and processing of modified polymer materials, a feeding device is needed to continuously and stably feed the screw to ensure smooth production process and uniform and stable production products. At present, the production and processing flow of the modified polymer materials of the company is as follows: mixing of materials on the second floor, feeding and extruding and granulating on the first floor. That is, the materials are uniformly mixed by a mixing machine on the second floor, and then the materials are put into a feeding hopper on the first floor through a pipeline. The feeding hopper is provided with stirring paddles to stir the materials to ensure that the materials are uniformly and stably conveyed to the extruding screw through the feeding screw for granulation production.
[0003] However, the mainstream feeding device of the plastic extruder has the problems of poor uniformity and stability of feeding, which affects the continuity of the production process and the quality of the products. The problems mainly manifest in the following two aspects:
[0004] (1) The uniformly mixed materials on the second floor are put into the feeding hopper on the first floor through a pipeline. Due to gravity, the materials put out from the second floor will impact the materials in the feeding hopper on the first floor, causing the feeding to suddenly increase in a short time, and in severe cases, the materials will overflow from the discharge port.
[0005] (2) For some high-ratio oil-filled powder materials with certain fluidity, the feeding amount will change with the filling degree of the materials in the feeding hopper. When the materials fill the feeding hopper, the materials at the bottom of the feeding hopper are subjected to a large pressure from the materials above, which will cause the feeding screw to discharge more materials. When the materials fill half or less of the feeding hopper, the materials at the bottom of the feeding hopper are subjected to a small pressure from the materials above, which will cause the feeding screw to discharge less materials. The unstable feeding amount will cause the production products to have uneven particle sizes, and in severe cases, the materials will overflow or the machine will stop due to lack of materials. SUMMARY
[0006] The purpose of the present application is to solve the above technical problems and provide a feeding device of a plastic extruder and the plastic extruder, which can realize uniform and stable feeding to ensure the continuity of the production process and the quality of the products.
[0007] To this end, the present application provides a feeding device of a plastic extruder. The feeding device comprises a feeding hopper and a stirring mechanism. The stirring mechanism is arranged in the feeding hopper. The stirring mechanism comprises a rotating shaft and stirring blades fixed to the rotating shaft. An output shaft of a first stirring motor is connected to the rotating shaft to drive the stirring mechanism to rotate. The stirring mechanism further comprises a conical buffer support. The conical buffer support is fixed to the rotating shaft, and the conical surface of the conical buffer support faces upward. The stirring blades are arranged below the conical buffer support.
[0008] Preferably, the stirring mechanism further comprises stirring paddles, the stirring paddles being connected at the edge of the bottom of the conical surface of the conical buffer support body and extending outward in the circumferential direction.
[0009] Preferably, the stirring paddles are rectangular paddles, and a plurality of the stirring paddles are fixedly installed at the edge of the bottom of the conical surface of the conical buffer support body.
[0010] Preferably, the distance between the edge of the bottom of the conical surface of the conical buffer support body and the inner wall of the feeding hopper is not less than 15 cm, and the distance between the distal end of the outer side of the stirring paddles and the inner wall of the feeding hopper is less than 1 cm.
[0011] Preferably, the stirring paddles are triangular frame stirring paddles.
[0012] Preferably, the triangular frame stirring paddles are a plurality of triangular frame stirring paddles, and the plurality of triangular frame stirring paddles are fixedly installed on the rotating shaft.
[0013] Preferably, a cover plate is installed at the top opening of the feeding hopper, a first stirring motor is installed on the cover plate, the output shaft of the first stirring motor penetrates through the cover plate and is connected with the stirring mechanism, and the downcomer penetrates through the cover plate in the downward direction, and the downcomer outlet faces the conical surface of the conical buffer support body.
[0014] Preferably, the feeding device further comprises a feeding screw assembly, and the stirring cavity of the feeding screw assembly is in communication with the bottom opening of the feeding hopper.
[0015] Preferably, the feeding device further comprises a blowing device, and the blowing device is provided with a blowing pipe in sealed communication with the stirring cavity.
[0016] The utility model further provides a plastic extruder which comprises the feeding device of the plastic extruder according to any one of the above.
[0017] The utility model discloses a feeding device of plastic extruder and plastic extruder, be equipped with the conical buffer support that can rotate with the stirring vane in the feeding hopper, after material enters the feeding hopper from high through the downcomer, first impact on the conical surface of conical buffer support, and the conical buffer support plays the buffering action to the material falling, fundamentally avoids the problem that the material suddenly increases in short time caused by the material directly impacting the material in the feeding hopper, then under the joint action of self -gravity and centrifugal force generated by the rotation of conical buffer support, the material on the conical buffer support continues spiral trajectory and slides down along the conical surface, enters from the gap between the bottom edge of the conical surface of conical buffer support and the inner wall of the feeding hopper, evenly disperses and fills the bottom of the feeding hopper, and the stirring vane stirs the material at the bottom of the feeding hopper, in the stirring process, the material at the bottom of the feeding hopper continuously discharges after stirring, and the material on the conical buffer support continuously enters the bottom of the feeding hopper through the gap between the bottom edge of the conical surface and the inner wall of the feeding hopper, in this process, the conical buffer support plays the supporting action to the material not entering the bottom of the feeding hopper, avoids the gravity extrusion to the material at the bottom of the feeding hopper, and the material at the bottom of the feeding hopper is always in the dynamic balance state of feeding and discharging, realizes the uniform stability of supply, and ensures the continuity of production process and product quality. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, without creative labor, other drawings can also be obtained from these drawings.
[0019] Figure 1 It is the structure schematic diagram of the partial section view of the utility model plastic extruder;
[0020] Figure 2 It is the structure schematic diagram of the partial section view of the feeding device in the utility model;
[0021] Figure 3 It is Figure 2 The structure schematic diagram of the enlarged view of A part in the utility model;
[0022] Figure 4 It is the structure schematic diagram of the plan view of the conical buffer support of the utility model in the feeding hopper that is installed with stirring paddle.
[0023] The figure is marked: 1. feeding hopper; 2. stirring mechanism; 3. first stirring motor; 4. cover plate; 5. discharging pipe; 6. feeding screw assembly; 7. blowing device; 8. extruder, 21. rotating shaft; 22. stirring blade; 23. conical buffer support; 24. stirring paddle; 61. stirring cavity; 62. second stirring motor; 63. feeding channel; 71. blowing pipe;
[0024] L1 is the distance between the bottom edge of the conical surface of the conical buffer support 23 and the inner wall of the feeding hopper 1;
[0025] L2 is the distance between the outer distal end of the stirring paddle 24 and the inner wall of the feeding hopper 1. DETAILED DESCRIPTION
[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved in the present application more clear and obvious, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application. The methods used in the present application are conventional methods unless otherwise specified; the raw materials and devices used are conventional commercially available products unless otherwise specified.
[0027] As shown in Figure 1 , Figure 2 The present application provides a feeding device of a plastic extruder, which comprises a feeding hopper 1 and a stirring mechanism 2. The stirring mechanism 2 is arranged in the feeding hopper 1. The stirring mechanism 2 comprises a rotating shaft 21 and a stirring blade 22 fixed on the rotating shaft 21. The output shaft of a first stirring motor 3 is connected with the rotating shaft 21 to drive the stirring mechanism 2 to rotate. The stirring mechanism 2 further comprises a conical buffer support 23 fixed on the rotating shaft 21. The conical surface of the conical buffer support 23 faces upward. The stirring blade 22 is arranged below the conical buffer support 23.
[0028] The utility model discloses before using, first feed pipe 5 is inserted into feeding hopper 1, and the feed outlet of feed pipe 5 is set in the direct top of the taper of conical buffer support 23, open first stirring motor 3, under the power output of first stirring motor 3, conical buffer support 23 and stirring vane 22 rotate around pivot 21 together. After material enters feeding hopper 1 from high place through feed pipe 5, first impact on the taper of conical buffer support 23, and conical buffer support 23 plays the buffering effect to the material falling, fundamentally avoids the problem that feeding suddenly increases for a short time caused by the direct impact of material on the material in feeding hopper 1, then under the joint action of self gravity and centrifugal force generated by the rotation of conical buffer support 23, the material on conical buffer support 23 continues spiral trajectory and slides down along the taper, enters from the gap between the bottom edge of the taper of conical buffer support 23 and the inner wall of feeding hopper 1, evenly disperses and fills the bottom of feeding hopper 1, and stirring vane 22 stirs the material in the bottom of feeding hopper 1, and in the stirring process, the material in the bottom of feeding hopper 1 continuously discharges after stirring, and the material on conical buffer support 23 continuously enters the bottom of feeding hopper 1 through the gap between the bottom edge of the taper of conical buffer support 23 and the inner wall of feeding hopper 1, and in this process, conical buffer support 23 plays the supporting effect to the material not entering the bottom of feeding hopper 1, avoids the gravity extrusion to the material in the bottom of feeding hopper 1, and the material in the bottom of feeding hopper 1 is always in the dynamic balance state of feeding and discharging, realizes the uniform stability of feeding, and ensures the continuity of production process and product quality.
[0029] In some embodiments, preferably, by Figures 2 to 4 As shown in the figure, the stirring mechanism 2 further comprises stirring paddles 24, and the bottom edge of the taper of the conical buffer support 23 is connected with the stirring paddles 24, and the stirring paddles 24 extend outward in the circumferential direction. The conical buffer support 23 rotates at the same time, driving the stirring paddles 24 to rotate, improving the smoothness of the material in the gap between the conical buffer support 23 and the feeding hopper 1, avoiding the accumulation and bridging of sticky materials, ensuring the stability of feeding.
[0030] In some embodiments, preferably, by Figure 2 、 Figure 4 As shown in the figure, the stirring paddles 24 are rectangular paddles, and a plurality of stirring paddles 24 are arranged, and the stirring paddles 24 are fixedly installed at the bottom edge of the taper of the conical buffer support 23, further improving the smoothness of the material in the gap between the conical buffer support 23 and the feeding hopper 1, and ensuring the stability of feeding.
[0031] In some embodiments, preferably, by Figure 4As shown, the distance L1 between the bottom edge of the conical surface of the conical buffer support 23 and the inner wall of the feeding hopper 1 is not less than 15cm to avoid the material being discharged too slowly due to the small distance; the distance L2 between the outer far end of the stirring blade 24 and the inner wall of the feeding hopper 1 is less than 1cm to ensure that the material in the gap between the conical buffer support 23 and the feeding hopper 1 is discharged smoothly.
[0032] In some embodiments, preferably, by Figure 2 As shown, the stirring blade 22 is a triangular frame-shaped stirring paddle, which further prevents material accumulation and bridging at the bottom of the conical buffer support 23 during the stirring process.
[0033] In some embodiments, preferably, by Figure 2 , Figure 4 As shown, there are multiple triangular frame-shaped stirring paddles, which are fixedly installed on the rotating shaft 21 in a ring around each other to further improve the material stirring effect and avoid material accumulation and bridging at the bottom of the conical buffer support 23.
[0034] In some embodiments, preferably, by Figure 2 As shown, a cover plate 4 is installed at the top opening of the feeding hopper 1. A first stirring motor 3 is installed on the cover plate 4. The output shaft of the first stirring motor 3 passes through the cover plate 4 and is connected to the stirring mechanism 2. The discharge pipe 5 passes downward through the cover plate 4, and the discharge port of the discharge pipe 5 faces the conical surface of the conical buffer support 23. The cover plate 4 is added to prevent materials falling from a height onto the conical buffer support 23 from splashing.
[0035] In some embodiments, preferably, by Figure 2 As shown, the feeding device also includes a feeding screw assembly 6, the mixing chamber 61 of which is connected to the bottom opening of the feeding hopper 1. The feeding screw assembly 6 is prior art, comprising a second stirring motor 62, a mixing chamber 61, and a feeding screw penetrating the mixing chamber 61. The second stirring motor 62 is connected to and drives the feeding screw to rotate. In use, the material at the bottom of the feeding hopper 1 is stirred and falls into the mixing chamber 61. The feeding screw then rotates and extrudes the material through the feeding channel 63 into the barrel of the extruder 8.
[0036] In some embodiments, preferably, by Figure 2 As shown, the feeding device also includes an air blowing device 7, which has an air blowing pipe 71 that is sealed and connected to the mixing chamber 61. The air output of the air blowing pipe 71 can be controlled by an external valve. In conjunction with the mixing blades 22, it can break up sticky and bridging materials near the bottom opening of the hopper, ensuring the stability of the feeding process. This solves the technical problems of manual breaking up materials with a mixing rod, which is time-consuming and labor-intensive and seriously affects production efficiency and stability.
[0037] Depend onFigure 1 The utility model also provides a plastic extruder, it includes the plastic extruder's feeding device as any one of above embodiment.
[0038] In the description of the utility model, it is understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "intermediate" indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a specific orientation, a specific orientation and operation, therefore, it cannot be understood as a limitation on the utility model. It should be noted that in the above embodiment, "first", "second" do not represent the absolute division relationship of structure and / or function, nor represent the execution order, but only for the convenience of description.
[0039] The above is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims
1. A feeding device of a plastic extruder, the feeding device comprising a feeding hopper (1) and a stirring mechanism (2) arranged in the feeding hopper (1), the stirring mechanism (2) comprising a rotating shaft (21) and stirring blades (22) fixed to the rotating shaft (21), an output shaft of a first stirring motor (3) being connected to the rotating shaft (21) to drive the stirring mechanism (2) to rotate, characterized in that, The stirring mechanism (2) further comprises a conical buffer support body (23) fixed on the rotating shaft (21), and the conical surface of the conical buffer support body (23) faces upward, and the stirring blades (22) are arranged below the conical buffer support body (23).
2. A feeding device for a plastic extruder according to claim 1, characterized in that The stirring mechanism (2) further comprises stirring paddles (24) connected at the bottom edge of the conical surface of the conical buffer support body (23), and the stirring paddles (24) are arranged in a circumferential direction outward.
3. A feeding device for a plastic extruder according to claim 2, characterized in that The stirring paddles (24) are rectangular paddles, and a plurality of the stirring paddles (24) are fixedly installed at the bottom edge of the conical surface of the conical buffer support body (23) in a circumferential direction.
4. A feeding device for a plastic extruder as claimed in claim 2, characterized in that The spacing L1 between the bottom edge of the conical surface of the conical buffer support body (23) and the inner wall of the feeding hopper (1) is not less than 15 cm, and the spacing L2 between the distal end of the outer side of the stirring paddles (24) and the inner wall of the feeding hopper (1) is less than 1 cm.
5. A feeding device for a plastic extruder as defined in claim 1, characterized in that The stirring blades (22) are triangular frame type stirring paddles.
6. A feeding device for a plastic extruder according to claim 5, characterized in that The triangular frame type stirring paddles are a plurality of stirring paddles fixedly installed on the rotating shaft (21) in a circumferential direction.
7. A feeding device for a plastic extruder as defined in claim 1, characterized in that A cover plate (4) is installed at the top opening of the feeding hopper (1), the first stirring motor (3) is installed on the cover plate (4), the output shaft of the first stirring motor (3) penetrates the cover plate (4) and is connected with the stirring mechanism (2), and a discharge pipe (5) penetrates the cover plate (4) downward, and the discharge port of the discharge pipe (5) faces the conical surface of the conical buffer support body (23).
8. A feeding device for a plastic extruder according to any one of claims 1-7, characterized in that The feeding device further comprises a feeding screw assembly (6), and the stirring cavity (61) of the feeding screw assembly (6) is in communication with the bottom opening of the feeding hopper (1).
9. A feeding device for a plastic extruder according to claim 8, characterized in that The feeding device further comprises a blowing device (7) provided with a blowing pipe (71) in sealed communication with the stirring cavity (61).
10. A plastic extruder characterized by, The feeding device comprises the plastic extruder feeding device according to any one of claims 1-9. The feeding device comprises the plastic extruder feeding device according to any one of claims 1-9.