Extruder screw with high extrusion efficiency

Abstract

The utility model relates to the technical field of extruder screws, in particular to an extruder screw with high extrusion efficiency, which comprises a feeding section, a compression section and a metering section, a power connecting end is arranged on one side of the feeding section, a sealing connecting section is arranged between the feeding section and the power connecting end, the compression section is coaxially arranged on one side, far away from the power connecting end, of the feeding section, and the metering section is coaxially arranged on the other side of the feeding section. The two ends of the compression section are coaxially and fixedly connected with a first dispersion section and a second dispersion section respectively, the metering section is coaxially and fixedly connected with the second dispersion section, and a material groove from deep to shallow is formed in the metering section from one end in contact with the second dispersion section to one end in contact with the extrusion section; when materials enter the trough of the metering section and then are conveyed forwards, the gap between the trough and the barrel wall of the extruder endows the materials with gradually-increased high shear force, after a material solid bed is broken, residual material solids or material polymers are lengthened, the surface area exposed in adjacent melts is increased, and the material solids or the material polymers are separated from each other. And the plastic particles in the melt are fully heated and melted.

Description

Technical Field

[0001] The present application relates to the field of extruder screws, and in particular to an extruder screw with high extrusion efficiency. Background Art

[0002] At present, extrusion molding equipment mainly includes two parts: the main machine and the auxiliary machine. The main machine is called the extruder, which is composed of the extrusion system screw, barrel, feeding device, etc. The screw, as the heart of the extruder, has a very important influence on the quality and output of the extruder product. The main function of the screw is to convey materials, transfer heat to plasticize materials, and mix and homogenize materials. It rotates in the barrel of the extruder. Its main function is to transport, compact, melt and plasticize solid plastic particles or plastic powder into a molten state.

[0003] Referring to the Chinese patent application with publication number CN214239478U, a screw with high extrusion efficiency is disclosed, wherein a connecting section, a first homogenizing section, a second homogenizing section, and a mixing head are sequentially arranged on the screw body from right to left; the left side of the mixing head is a conical head, and the left end of the conical head is hemispherical. Thus, by arranging the first thread, the second thread and the conical head of the mixing head on the screw body, the screw can discharge materials faster and more smoothly when used; and the mixing head is provided with a refining screw groove to improve the homogenizing effect of the screw on the material, thereby improving the quality of the finished product;

[0004] However, in the prior art, the material in the metering section of the extruder needs to maintain the plasticizing temperature and accurately and quantitatively convey the molten material. The plastic particles in the melt adhere to each other after being melted by heat, and the plastic particles in the middle of the melt are difficult to mix evenly. In order to ensure the high-quality discharge of the melt, a relatively high temperature needs to be maintained, resulting in unnecessary energy waste. For this reason, we have designed an extruder screw with high extrusion efficiency. Utility Model Content

[0005] An extruder screw with high extrusion efficiency provided in an embodiment of the present application can impart a higher shear force to the material in the gap from deep to shallow between the material trough and the barrel wall on the metering section. After the solid bed of the material is broken, the remaining material solids or material polymers are elongated, increasing the surface area exposed to the adjacent material melt. The supply temperature can be appropriately lowered while ensuring high-quality discharge of the melt, thereby achieving a technical solution of saving energy.

[0006] The embodiment of the present application provides an extruder screw with high extrusion efficiency, comprising a feed section, a compression section and a metering section, wherein a power connection end is provided on one side of the feed section, and a mixing head is provided on the other side, a sealing connection section is provided between the feed section and the power connection end, the compression section is coaxially arranged on a side of the feed section away from the power connection end, a first dispersion section and a second dispersion section are coaxially fixedly connected at both ends of the compression section, respectively, the metering section is coaxially fixedly connected to the second dispersion section, an extrusion section is provided at one end of the metering section away from the second dispersion section, and a material trough from deep to shallow is provided in the metering section from one end in contact with the second dispersion section to one end in contact with the extrusion section;

[0007] The pressure and shear force generated by the rotation of the screw can fully plasticize and evenly mix the material. When the material enters the trough of the metering section and is transported forward, the depth of the trough is gradually shallowed. At this time, the gap between the trough with a gradually shallower depth and the wall of the extruder barrel gives the material a gradually increasing high shear force. After the solid bed of the material is broken, the remaining solid material or material polymer is elongated, increasing the surface area exposed to the adjacent melt, ensuring that the plastic particles in the melt are fully heated and melted, and finally formed through the die.

[0008] The above technical solutions in the embodiments of the present application have at least the following technical effects:

[0009] 1. In the present application, when the material enters the trough of the metering section and is transported forward, the gap between the trough and the wall of the extruder barrel, which is gradually shallower in depth, gives the material a gradually increasing high shear force. After the solid bed of the material is broken, the remaining solid material or material polymer is elongated, increasing the surface area exposed to the adjacent melt, ensuring that the plastic particles in the melt are fully heated and melted. While ensuring the high-quality discharge of the melt, the supply temperature can be appropriately reduced, thereby saving energy.

[0010] 2. The present application provides a second dispersion section between the metering section and the compression section to facilitate sufficient dispersion and uniform mixing of the materials entering the metering section trough, thereby ensuring the quality of the materials after melt extrusion molding. A buffer trough is provided between the second dispersion section and the metering section to facilitate buffering after the remaining material solids or material polymers are stretched, thereby preventing the metering section trough wall from being subjected to greater pressure and improving the service life of the screw metering section.

[0011] In some embodiments, a plurality of first dispersing tools and a plurality of second dispersing tools are respectively disposed on the first dispersing section and the second dispersing section, and an arrangement density of the plurality of first dispersing tools is less than an arrangement density of the plurality of second dispersing tools.

[0012] In some embodiments, a feed trough is provided on the feed section, and a compression feeding trough is provided on the compression section. The width of the feed trough is greater than the width of the compression feeding trough, and the width of the compression feeding trough is greater than the width of the feed trough.

[0013] In some embodiments, a buffer tank is provided between the second dispersion section and the metering section.

[0014] In some embodiments, a plurality of mixing screw grooves are provided on the extrusion section, and the mixing head is arranged in a conical shape.

[0015] In some embodiments, a mounting socket is provided on the power connection end.

[0016] In some embodiments, a sealed bearing is coaxially provided on the sealed connection section. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of an extruder screw with high extrusion efficiency provided in an embodiment of the present application;

[0019] Figure 2 A left and right isometric schematic diagram of an extruder screw with high extrusion efficiency provided in an embodiment of the present application;

[0020] Figure 3 A front view of an extruder screw with high extrusion efficiency provided in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of a trough structure of an extruder screw with high extrusion efficiency provided in an embodiment of the present application.

[0022] Among them, the reference numerals in the figure are:

[0023] 1. Feeding section; 2. Compression section; 3. Metering section; 4. Power connection end; 5. Mounting socket; 6. Sealing connection section; 7. First dispersion section; 8. Second dispersion section; 9. Buffer tank; 10. Material tank; 11. Extrusion section; 12. Refining screw groove; 13. Mixing head. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0027] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In this application, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0030] It should be noted that, in the present application, words such as "in the present embodiment", "exemplarily", "for example", etc. are used to indicate examples, illustrations or explanations. Any embodiment or design described in the present application as "in the present embodiment", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in the present embodiment", "exemplarily", "for example", etc. is intended to present related concepts in a concrete way, meaning that specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the above words in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] As the heart of the extruder, the screw has a very important influence on the quality and output of the extruder products. The main functions of the screw are to convey materials, transfer heat to plasticize materials, and mix and homogenize materials. It rotates in the barrel of the extruder. Its main function is to transport, compact, melt and plasticize solid plastic particles or plastic powder into a molten state.

[0032] A screw with high extrusion efficiency in the related technology has a connecting section, a first homogenizing section, a second homogenizing section, and a mixing head arranged on the screw body from right to left in sequence; the left side of the mixing head is a conical head, and the left end of the conical head is hemispherical. In this way, by arranging the first thread, the second thread and the conical head of the mixing head on the screw body, the screw can discharge materials faster and smoothly when used; and the refining screw groove is arranged on the mixing head to improve the homogenization effect of the screw on the material and improve the quality of the finished product.

[0033] Based on this, in order to improve the problem in the related art that plastic particles in the melt stick to each other after being heated and melted, the plastic particles in the middle of the melt are difficult to mix evenly, and in order to ensure high-quality discharge of the melt, a higher temperature needs to be maintained, resulting in unnecessary energy waste. The embodiments of the present application provide the following solution.

[0034] See also Figures 1 to 4 , an extruder screw with high extrusion efficiency comprises a feed section 1, a compression section 2 and a metering section 3, a power connection end 4 is provided on one side of the feed section 1, and a mixing head 13 is provided on the other side, a sealing connection section 6 is provided between the feed section 1 and the power connection end 4, the compression section 2 is coaxially arranged on the side of the feed section 1 away from the power connection end 4, the two ends of the compression section 2 are respectively coaxially fixedly connected with a first dispersion section 7 and a second dispersion section 8, the metering section 3 is coaxially fixedly connected with the second dispersion section 8, an extrusion section 11 is provided at one end of the metering section 3 away from the second dispersion section 8, and a material trough 10 from deep to shallow is opened in the metering section 3 from the end in contact with the second dispersion section 8 to the end in contact with the extrusion section 11;

[0035] The effect of such arrangement is that by providing a second dispersion section 8 between the metering section 3 and the compression section 2, the material entering the material trough 10 of the metering section 3 can be fully dispersed and mixed evenly, thereby ensuring the quality of the material after melt extrusion molding, and a buffer trough 9 is provided between the second dispersion section 8 and the metering section 3, so that the remaining material solids or material polymers can be stretched and play a buffering role, thereby preventing the wall of the material trough 10 of the metering section 3 from being subjected to greater pressure, thereby increasing the service life of the screw metering section 3.

[0036] See also Figure 1 and Figure 2 , a plurality of first dispersing tools and a plurality of second dispersing tools are respectively provided on the first dispersing section 7 and the second dispersing section 8, and the arrangement density of the plurality of first dispersing tools is less than the arrangement density of the plurality of second dispersing tools;

[0037] The effect of such arrangement is that the materials are facilitated to be fully dispersed and mixed evenly through the multiple first dispersing cutters and multiple second dispersing cutters on the first dispersing section 7 and the second dispersing section 8 in sequence, so as to ensure the quality of the extruded product.

[0038] See also Figure 1 and Figure 2 , a feed trough is provided on the feed section 1, a compression feed trough is provided on the compression section 2, the width of the feed trough is greater than the width of the compression feed trough, and the width of the compression feed trough is greater than the width of the feed trough 10;

[0039] The effect of such arrangement is to facilitate the materials to pass through the feed trough, the compression feeding trough and the material trough 10 in sequence, so as to facilitate the materials to be processed one by one in the extruder, thereby ensuring the full extrusion molding of the materials.

[0040] See also Figure 1 and Figure 4 , a buffer tank 9 is provided between the second dispersing section 8 and the metering section 3;

[0041] The effect of such arrangement is that a buffer groove 9 is provided between the second dispersion section 8 and the metering section 3, so that the remaining material solids or material polymers can be stretched to play a buffering role, thereby preventing the wall of the material groove 10 of the metering section 3 from being subjected to greater pressure, thereby increasing the service life of the screw metering section 3.

[0042] See also Figure 1 and Figure 2 The power connection end 4 is provided with a mounting socket 5, the sealing connection section 6 is coaxially provided with a sealing bearing, the extrusion section 11 is provided with a plurality of refining screw grooves 12, and the mixing head 13 is arranged in a conical shape;

[0043] The effect of such a setting is that by fixedly connecting the output end of the external drive mechanism with the power connection end 4 through the mounting socket 5, it is convenient to drive the screw to rotate in the extruder. By relying on the pressure and shear force generated by the rotation of the screw, the material can be fully plasticized and evenly mixed, and the mixing head 13 plays a role in mixing and homogenizing the raw materials.

[0044] From the above, we can see that the working principle of this application is as follows:

[0045] When the material enters the trough 10 of the metering section 3 and is transported forward, the depth of the trough 10 is gradually shallowed. At this time, the gap between the trough 10 with a gradually shallower depth and the wall of the extruder barrel gives the material a gradually increasing high shear force. After the material solid bed is broken, the remaining material solid or material polymer is elongated, increasing the surface area exposed to the adjacent melt, ensuring that the plastic particles in the melt are fully heated and melted;

[0046] By providing a second dispersion section 8 between the metering section 3 and the compression section 2, the material entering the material trough 10 of the metering section 3 can be fully dispersed and mixed evenly to ensure the quality of the material after melt extrusion molding. A buffer trough 9 is provided between the second dispersion section 8 and the metering section 3 to play a buffering role after the remaining material solids or material polymers are stretched, thereby preventing the wall of the material trough 10 of the metering section 3 from being subjected to a large pressure and improving the service life of the screw metering section 3.

[0047] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An extruder screw with high extrusion efficiency, characterized in that: include: A feeding section (1), wherein one side of the feeding section (1) is provided with a power connection end (4), and the other side is provided with a mixing head (13), and a sealing connection section (6) is provided between the feeding section (1) and the power connection end (4); A compression section (2), wherein the compression section (2) is coaxially arranged on a side of the feed section (1) away from the power connection end (4), and the two ends of the compression section (2) are coaxially fixedly connected to a first dispersion section (7) and a second dispersion section (8); A metering section (3) is coaxially fixedly connected to the second dispersion section (8), an extrusion section (11) is provided at one end of the metering section (3) away from the second dispersion section (8), and a material trough (10) extending from deep to shallow is provided on the metering section (3) from the end in contact with the second dispersion section (8) to the end in contact with the extrusion section (11).

2. The extruder screw with high extrusion efficiency according to claim 1, characterized in that: The first dispersing section (7) and the second dispersing section (8) are respectively provided with a plurality of first dispersing cutters and a plurality of second dispersing cutters, and the arrangement density of the plurality of first dispersing cutters is less than the arrangement density of the plurality of second dispersing cutters.

3. The extruder screw with high extrusion efficiency according to claim 1, characterized in that: The feed section (1) is provided with a feed trough, and the compression section (2) is provided with a compression feeding trough. The width of the feed trough is greater than the width of the compression feeding trough, and the width of the compression feeding trough is greater than the width of the feed trough (10).

4. The extruder screw with high extrusion efficiency according to claim 1, characterized in that: A buffer tank (9) is provided between the second dispersing section (8) and the metering section (3).

5. The extruder screw with high extrusion efficiency according to claim 1, characterized in that: The extrusion section (11) is provided with a plurality of mixing screw grooves (12), and the mixing head (13) is arranged in a conical shape.

6. The extruder screw with high extrusion efficiency according to claim 1, characterized in that: The power connection end (4) is provided with a mounting socket (5).

7. The extruder screw with high extrusion efficiency according to claim 1, characterized in that: A sealing bearing is coaxially arranged on the sealing connection section (6).

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