Cylinder screw structure for extruder

Abstract

The utility model relates to the technical field of extruder screws, and discloses a machine barrel screw structure for an extruder, which comprises a first machine barrel, a second machine barrel and a third machine barrel are sequentially arranged on the left side of the first machine barrel, and screws are arranged in the first machine barrel, the second machine barrel and the third machine barrel. By arranging the large-outer-diameter feeding section and the outer-diameter transition section, the extruder can adapt to more types of materials, especially fluffy materials and plastic materials in different shapes, so that the feeding stability and plasticizing uniformity of the materials are improved; the outer diameter of the screw rod is gradually changed, so that materials are compressed and mixed in different sections of the screw rod to different degrees, the plasticizing and mixing effects of the materials are optimized, and the high quality of a final product is ensured; through the segmented design of the machine barrel, the later maintenance convenience is improved, the replacement and cleaning of the screw rod and the machine barrel part are simpler and more convenient, and meanwhile, the maintenance cost is effectively controlled through the segmented structure of the machine barrel.

Description

Technical Field

[0001] This utility model relates to the field of extruder screw technology, specifically to a barrel screw structure for an extruder. Background Technology

[0002] In traditional extruder screw structures, the screw design is mostly single-stage or a few-stage, and the processing effect on materials is relatively limited. In the existing technology, although the screw of the extruder can meet the processing needs of plastics to a certain extent, there are problems such as large production line footprint, excessively long production line length, and poor adaptability to different material shapes.

[0003] Because the material is not fully plasticized and mixed when it enters the feeding section, the processing effect is uneven and the plasticization is incomplete, which affects the quality of the final product. In addition, the traditional screw design has high maintenance costs and complex operation, which brings considerable inconvenience to production.

[0004] Therefore, there is an urgent need for a new screw design that can effectively solve these problems and improve the performance and production efficiency of extruders.

[0005] In view of this, we propose a barrel screw structure for extruders. Utility Model Content

[0006] The purpose of this invention is to provide a barrel and screw structure for an extruder to solve the problems existing in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An extruder barrel and screw structure includes a first barrel, a second barrel and a third barrel arranged sequentially on the left side of the first barrel, and a screw disposed inside the first barrel, the second barrel and the third barrel.

[0009] Preferably, the first barrel has a feed inlet, the first barrel and the second barrel are fixedly connected by a first screw, and the second barrel and the third barrel are fixedly connected by a second screw.

[0010] Preferably, the screw surface is provided with screw ridges, and the front section of the screw is configured as a large outer diameter feeding section, which is located below the feed inlet.

[0011] Preferably, the middle section of the screw is configured as a gradually changing outer diameter section, in which the screw gradually changes from a large outer diameter to a small outer diameter.

[0012] Preferably, the rear section of the screw is configured as a small outer diameter discharge section, and the screw grooves in the small outer diameter discharge section are quantitatively set.

[0013] Preferably, the screw in the large-diameter feed section has a large screw thread outer diameter and a deep screw thread groove.

[0014] Preferably, in the outer diameter gradient section, the outer diameter of the screw thread gradually changes from a large outer diameter to a small outer diameter, and the screw thread groove in the outer diameter gradient section changes from deep to shallow.

[0015] By employing the above technical solution, this utility model provides a barrel and screw structure for an extruder. It possesses at least the following beneficial effects:

[0016] (1) By setting a large outer diameter feeding section and an outer diameter gradual section, this utility model enables the extruder to adapt to more types of materials, especially fluffy materials and plastic materials of different shapes, thereby improving the feeding stability and plasticization uniformity of the materials.

[0017] (2) By gradually changing the outer diameter of the screw, the material is compressed and mixed to different degrees in different sections of the screw, which optimizes the plasticizing and mixing effect of the material and ensures the high quality of the final product.

[0018] (3) By designing the barrel in sections, this utility model improves the convenience of later maintenance, making the replacement and cleaning of screw and barrel components easier. At the same time, the sectioned structure of the barrel effectively controls maintenance costs.

[0019] (4) By optimizing the screw, this utility model can complete the material processing more efficiently, shorten the length of the production line, save the equipment floor space, and help reduce the production cost of enterprises. At the same time, the quantitative and stable discharge section and the reasonable outer diameter gradient design make the material extrusion more uniform and stable, and the production efficiency is significantly improved. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0021] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0022] Figure 2 This is an exploded view of the barrel structure in this utility model;

[0023] Figure 3 This is a plan view of the screw structure in this utility model.

[0024] In the diagram: 1. First barrel; 11. Feed inlet; 2. Second barrel; 3. Third barrel; 4. Screw; 41. Screw rib; 5. Large outer diameter feed section; 6. Outer diameter transition section; 7. Small outer diameter discharge section; 8. First screw; 9. Second screw. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-3 As shown, this utility model provides a barrel and screw structure for an extruder, comprising a first barrel 1, a second barrel 2 and a third barrel 3 arranged sequentially on the left side of the first barrel 1, and a screw 4 arranged inside the first barrel 1, the second barrel 2 and the third barrel 3;

[0027] The first barrel 1 is provided with a feed port 11. The first barrel 1 and the second barrel 2 are fixedly connected by the first screw 8. The second barrel 2 and the third barrel 3 are fixedly connected by the second screw 9.

[0028] The segmented design of the barrel improves the convenience of later maintenance, making the replacement and cleaning of screw and barrel components easier, while controlling the cost of barrel maintenance.

[0029] At the same time, the material enters the large outer diameter feed section 5 of the screw 4 through the feed port 11 of the first barrel 1.

[0030] The screw 4 has a screw rib 41 on its surface. The front section of the screw 4 is configured as a large outer diameter feeding section 5, which is located below the feed inlet 1. The screw rib 41 of the screw 4 in the large outer diameter feeding section 5 has a large outer diameter and a deep groove.

[0031] In the large outer diameter feeding section 5, the material enters the barrel through the feed port 11 of the first barrel 1 and is fed by the spiral propulsion of the screw 4. In the large outer diameter feeding section 5, the screw rib 41 groove of the screw 4 is deepened for better feeding and the material conveying stroke is shortened, ensuring that the material can pass smoothly through the feed port 11 and be effectively gripped by the screw 4 when entering the extruder. Through this design, the extruder can adapt to processing loose and irregularly shaped materials, ensuring stable material feeding.

[0032] The middle section of the screw 4 is set as an outer diameter gradient section 6, in which the screw 4 gradually changes from a large outer diameter to a small outer diameter; the outer diameter of the screw rib 41 of the screw 4 in the outer diameter gradient section 6 changes from a large outer diameter to a small outer diameter as the screw 4 gradually changes from a large outer diameter to a small outer diameter, and the groove of the screw rib 41 of the screw 4 in the outer diameter gradient section 6 changes from deep to shallow.

[0033] The outer diameter gradient section 6 is connected to the large outer diameter feeding section 5. The screw 4 in the outer diameter gradient section 6 gradually changes from a large outer diameter to a small outer diameter. At the same time, the tooth grooves on the screw 4 change from deep to shallow as the screw 4 changes diameter, forming a high compression gradual plasticization.

[0034] The outer diameter gradually changing section 6 compresses the material at this stage, promoting effective plasticization of the material under high pressure, effectively optimizing the material's flowability and plasticization effect, and ensuring the material's uniformity and quality.

[0035] The rear section of the screw 4 is configured as a small outer diameter discharge section 7, and the screw ribs 41 grooves of the screw 4 in the small outer diameter discharge section 7 are quantitatively set;

[0036] The small outer diameter discharge section 7 is connected to the outer diameter gradient section 6. In the small outer diameter discharge section 7, the screw rib 41 groove on the screw 4 is quantitatively and pressure-stabilized for extrusion molding. At the same time, various mixing units can be added to the end of the small outer diameter screw to stir and mix the materials and enhance the quality of the finished product.

[0037] The small outer diameter discharge section 7, through its quantitative screw rib 41 groove structure, ensures stable material discharge and quantitative output. The material undergoes final compression in this section and is discharged through a precise quantitative control system, ensuring the uniformity and consistency of the finished product.

[0038] The inner diameter of the three-section barrel changes in the same way as the outer diameter of the screw, and the precision clearance fits various materials for forming and processing.

[0039] Compared to existing plastic extrusion screw components on the market, it has the same multi-segment spiral propulsion function, which can effectively improve the continuity of plastic extrusion, adapt to more material shapes with different diameters, shorten the production line length and save floor space, facilitate maintenance in the later stage due to the segmented barrel design, reduce costs, and be suitable for more plastic extrusion molding products.

[0040] In use, the extruder barrel and screw structure of this utility model is assembled by first screw 8 and second screw 9 to fix the first barrel 1, second barrel 2 and third barrel 3. The material enters the barrel through the feed port 11 on the first barrel 1. The screw 4 in the large outer diameter feed section 5 of the barrel grabs the material and feeds it through the spiral propulsion of the screw 4. The material is pushed into the outer diameter transition section 6 by the screw 4, where the outer diameter of the screw 4 gradually changes from large to small. At the same time, the grooves on the screw 4 change from deep to shallow as the diameter of the screw 4 changes. The material is compressed in the outer diameter transition section 6, which promotes the effective plasticization of the material under high pressure. The plasticized material is pushed into the small outer diameter discharge section 7 by the screw 4. The screw ribs 41 groove structure on the screw 4 in the small outer diameter discharge section 7 are quantitatively set to ensure stable material discharge and quantitative output, so that the material completes the final compression in this section.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A barrel screw structure for an extruder comprising a first barrel (1), characterized in that: A second barrel (2) and a third barrel (3) are arranged sequentially on the left side of the first barrel (1), and a screw (4) is arranged inside the first barrel (1), the second barrel (2) and the third barrel (3).

2. A barrel screw structure for an extruder according to claim 1, characterized in that: The first barrel (1) has a feed inlet (11), the first barrel (1) and the second barrel (2) are fixedly connected by the first screw (8), and the second barrel (2) and the third barrel (3) are fixedly connected by the second screw (9).

3. A barrel screw structure for an extruder according to claim 1, characterized in that: The screw (4) has a screw ridge (41) on its surface, and the front section of the screw (4) is configured as a large outer diameter feeding section (5), which is located below the feed inlet (11).

4. The barrel screw structure for an extruder according to claim 1, wherein: The middle section of the screw (4) is set as an outer diameter gradient section (6), in which the screw (4) gradually changes from a large outer diameter to a small outer diameter.

5. The barrel screw structure for an extruder according to claim 1, wherein: The rear section of the screw (4) is set as a small outer diameter discharge section (7), and the screw rib (41) groove of the screw (4) in the small outer diameter discharge section (7) is quantitatively set.

6. A barrel screw structure for an extruder according to claim 3, wherein: The screw (4) in the large outer diameter feeding section (5) has a large outer diameter screw rib (41) and a deep screw rib (41) groove.

7. A barrel screw structure for an extruder according to claim 4, wherein: In the outer diameter gradient section (6), the outer diameter of the screw edge (41) of the screw (4) gradually changes from a large outer diameter to a small outer diameter as the screw (4) changes, and the groove of the screw edge (41) of the screw (4) in the outer diameter gradient section (6) changes from deep to shallow.

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