A screw separation type double barrier pin type mixing structure

Abstract

This utility model relates to the field of extruder screw technology and discloses a screw-separated double-barrier pin-type mixing structure, including a screw with screw ribs on its surface. The front section of the screw is configured as a feeding section, and the middle section of the screw ribs includes a main screw rib and a secondary screw rib. This utility model, through the separation-type double-screw rib design composed of the main and secondary screw ribs, allows the material to be fully tumbled to the B section after being heated and compressed in the A section. This process creates an effective separation effect, enhancing the plasticizing effect of the material and ensuring the uniformity of the molten material. By evenly arranging pins around the bottom diameter of the screw ribs, the material can be effectively stirred and mixed, further improving the mixing effect, especially when dealing with high-viscosity materials, improving the uniformity of mixing and ensuring the consistency of the final product quality.

Description

Technical Field

[0001] This utility model relates to the field of extruder screw technology, specifically a screw-separated double-barrier seed nail mixing structure. Background Technology

[0002] In the plastic extrusion molding process, the screw is a key component that determines the material processing quality and finished product performance. Traditional extruder screw design mainly relies on continuous spiral propulsion. However, when dealing with high-viscosity materials or special plastics, this design often suffers from problems such as insufficient plasticization, uneven mixing, and insufficient hot pressing of materials, which in turn affects product quality and production efficiency.

[0003] Most plastic extruder screws on the market are currently single-type spiral propulsion structures, lacking effective separation and mixing functions. Especially in cases of high viscosity and difficulty in mixing in the molten state, traditional screw designs cannot provide sufficient material stirring and heat conduction, resulting in incomplete plasticization and uneven mixing during the production process, which affects the physical properties and appearance of the final product.

[0004] In view of this, we propose a screw-separated double-barrier nail-type mixing structure. Utility Model Content

[0005] The purpose of this invention is to provide a screw-separated double-barrier nail-type mixing structure to solve the problems existing in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A screw-separated double-barrier nail-type mixing structure includes a screw, the surface of which is provided with screw ridges, the front section of which is configured as a feeding section, and the middle section of which includes a main screw ridge and a secondary screw ridge.

[0008] Preferably, the main thread has a main thread face milled bottom, and the secondary thread has a secondary thread face milled bottom, wherein the secondary thread face milled bottom is lower than the main thread face milled bottom.

[0009] Preferably, a B groove is provided between the screw edges in the middle section of the screw, and an A groove is provided between the main screw edge and the auxiliary screw edge in the middle section of the screw.

[0010] Preferably, the rear section of the screw is configured as a double-barrier section, and a first pin and a second pin are provided on the left and right sides of the double-barrier section.

[0011] Preferably, there are multiple first pins and second pins, and each first pin and second pin is evenly distributed along the circumference of the bottom diameter of the threaded groove.

[0012] By employing the above technical solution, this utility model provides a screw-separated double-barrier seed nail mixing structure. It possesses at least the following beneficial effects:

[0013] (1) This utility model adopts a separation-type double screw design composed of main screw and auxiliary screw. When the material is heated and compressed in the A tank, it can be fully turned to the B tank. In this process, an effective separation effect is formed, which enhances the plasticizing effect of the material and ensures the uniformity of the molten material.

[0014] (2) By arranging pins evenly around the bottom diameter of the screw groove, this utility model can effectively stir and mix materials, further improving the mixing effect of materials. Especially when dealing with high viscosity materials, it can improve the uniformity of mixing and ensure the consistency of the final product quality.

[0015] (3) While maintaining the multi-stage spiral propulsion effect, this utility model can effectively improve the material flowability and processing stability during plastic extrusion, making the production process more continuous and smooth, and reducing the possibility of interruption and shutdown. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0017] Figure 1 This is an overall front view of the present invention;

[0018] Figure 2 This is a partial schematic diagram of the present invention;

[0019] Figure 3 This is an overall side view of the present invention.

[0020] In the diagram: 1. Screw; 2. Feed section; 3. Screw edge; 4. Main screw edge; 5. Main screw edge milled to the bottom; 6. Secondary screw edge; 7. Secondary screw edge milled to the bottom; 8. B groove; 9. A groove; 10. First pin; 11. Double barrier section; 12. Second pin. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-3As shown, this utility model provides a screw-separated double-barrier nail-type mixing structure, including a screw 1, the surface of the screw 1 is provided with screw ribs 3, the front section of the screw 1 is set as a feeding section 2, and the middle section screw ribs 3 of the screw 1 includes a main screw rib 4 and a secondary screw rib 6;

[0023] The material first enters the feed section 2 of the screw 1. The screw 1 propels the material into the main-supplement separation type double screw ridge area, which consists of the main screw ridge 4 and the auxiliary screw ridge 6.

[0024] The main thread 4 is provided with a main thread face milled bottom 5, and the secondary thread 6 is provided with a secondary thread face milled bottom 7. The secondary thread face milled bottom 7 is lower than the main thread face milled bottom 5.

[0025] A groove B 8 is provided between the screw edges 3 in the middle section of the screw 1, and a groove A 9 is provided between the main screw edge 4 and the auxiliary screw edge 6 in the middle section of the screw 1.

[0026] After the material is propelled into the main-supplement separation double-screw zone by the screw 1, it undergoes initial compression and heating between the main screw 4 and the secondary screw 6. The bottom of the secondary screw 6 is lower than that of the main screw 4. As the material passes through the spiral progressive action of groove A 9, it is heated and compressed, and gradually melts. When the material passes through the bottom of the secondary screw 6, it is subjected to tumbling on the secondary screw surface, forming a strong separation effect, which greatly improves the thermal uniformity and plasticizing effect of the material.

[0027] The rear section of the screw 1 is configured as a double barrier section 11, and a first pin 10 and a second pin 12 are provided on the left and right sides of the double barrier section 11.

[0028] There are several first pins 10 and second pins 12, and each first pin 10 and second pin 12 is evenly distributed along the circumference of the bottom diameter of the screw groove 3.

[0029] The material molten in the middle section of screw 1 undergoes further plasticization through the double barrier section 11. In this stage, the material is subjected to higher pressure and temperature, thereby achieving a more uniform molten state and preparing for the subsequent molding process.

[0030] The first and second pins are evenly arranged around the bottom diameter of the screw groove to further improve the mixing effect. At this stage, the first and second pins accelerate the mixing of materials through mechanical stirring, making the various components in the material fully uniform and reducing problems caused by uneven heating or melting.

[0031] Especially when dealing with high-viscosity materials, the seed-type mixing design can significantly improve the mixing effect and ensure the stability of the final product quality.

[0032] Compared to existing plastic extrusion screw components on the market, it has the same multi-stage spiral propulsion function, which can effectively improve the continuity of plastic extrusion. The flexible design of separation type, double barrier section and post-seedling mixing makes it easy to maintain, low cost and suitable for more plastic extrusion molded products.

[0033] In the use of this screw-separated double-barrier nail-type mixing structure, the material first enters the feeding section 2 of the screw 1. The screw 1 propels the material into the main-secondary separation double-screw zone, which consists of the main screw 4 and the secondary screw 6. After entering the main-secondary separation double-screw zone, the material undergoes initial compression and heating between the main screw 4 and the secondary screw 6. Through the spiral progression of groove A 9, the heated and compressed molten material is tumbled into groove B 8 through the milled bottom 7 of the secondary screw ridge, forming a separation effect. Finally, the material enters the double-barrier section 11 for further plasticization. The material is stirred and mixed by the pins evenly distributed around the bottom diameter of the screw ridge 3 groove in the rear section of the screw 1. Finally, the material is fully plasticized and mixed, and then pushed by the screw to the outlet of the extruder for molding.

[0034] 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.

[0035] 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 screw-separated double-barrier seed nail type mixing structure, comprising a screw (1), characterized in that: The screw (1) has a screw rib (3) on its surface. The front section of the screw (1) is set as the feeding section (2). The middle section screw rib (3) of the screw (1) includes a main screw rib (4) and a secondary screw rib (6).

2. The screw-separated double-barrier seed nail type mixing structure according to claim 1, characterized in that: The main threaded edge (4) is provided with a main threaded surface milled bottom (5), and the secondary threaded edge (6) is provided with a secondary threaded surface milled bottom (7). The secondary threaded surface milled bottom (7) is lower than the main threaded surface milled bottom (5).

3. The screw-separated double-barrier seed nail type mixing structure according to claim 1, characterized in that: A B groove (8) is provided between the screw ribs (3) in the middle section of the screw (1), and an A groove (9) is provided between the main screw rib (4) and the secondary screw rib (6) in the middle section of the screw (1).

4. The screw-separated double-barrier seed nail type mixing structure according to claim 1, characterized in that: The rear section of the screw (1) is configured as a double barrier section (11), and a first pin (10) and a second pin (12) are provided on the left and right sides of the double barrier section (11).

5. The screw-separated double-barrier seed nail type mixing structure according to claim 4, characterized in that: There are several first pins (10) and second pins (12), and each first pin (10) and second pin (12) is evenly distributed along the circumference of the bottom diameter of the screw groove (3).

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