Apparatus for the production of thermoplastic elastomers

Abstract

The application discloses a kind of preparation equipment of thermoplastic elastomer, comprising: extrusion head installation cylinder, the output end of the extrusion head installation cylinder is equipped with extrusion head assembly, the output end of the extrusion head assembly is rotatably installed with cutting knife assembly, further comprising: the extrusion head assembly is made of multiple extrusion blocks, the middle part of each extrusion block is provided with elastic adjusting hole assembly;The elastic adjusting hole assembly includes elastic film cylinder and aperture positioning sheet around the outer ring of elastic film cylinder, the outer ring of the two end faces of the elastic film cylinder is respectively connected with the corresponding end face of extrusion block, and the outer ring of the aperture positioning sheet is provided with adjusting cylinder which moves along the axial direction of elastic film cylinder.The elastic adjusting hole assembly with elastically adjustable aperture is used to adjust the aperture of raw material passing through each extrusion block, so that the replacement operation of each extrusion block and the whole extrusion head assembly is avoided, and the process and cost are saved.

Description

Technical Field

[0001] This invention relates to the field of thermoplastic elastomer preparation technology, and in particular to a thermoplastic elastomer preparation apparatus. Background Technology

[0002] Styrene-based thermoplastic elastomers are a class of styrene-based thermoplastic elastomers obtained through living anionic polymerization of styrene and isoprene (or butadiene). They can be plasticized and molded at high temperatures, while exhibiting the elastic characteristics of vulcanized rubber at room temperature. Their high elasticity, ease of processing, ease of blending, and reusability of scrap materials have led to a wide range of applications and increasing demand, resulting in their widespread use in adhesives, coatings, and plastic modification.

[0003] In existing technologies, thermoplastic elastomers are produced using extrusion equipment. The molten mixed raw materials are discharged through an extruder head, and then the extruded strip-shaped raw materials are cut into granules of a specified size and weight by periodically rotating cutters. These granules are then collected for later use. The diameter of the raw materials is usually determined by the orifice of the extruder head. Therefore, when producing raw materials with different orifice diameters, it is necessary to replace the extruder head with a different discharge orifice diameter. This requires disassembling and assembling the extruder head components of the equipment, which is time-consuming. Furthermore, it requires multiple extruder head assemblies with different orifice diameters, which also increases production costs. Summary of the Invention

[0004] Therefore, it is necessary to provide a thermoplastic elastomer preparation device to address the above-mentioned technical problems. By adjusting the aperture of the raw material passing through each extrusion block through an elastically adjustable aperture assembly, the aperture size of the raw material particles can be adjusted, avoiding the need to replace each extrusion block and the entire extrusion head assembly, thus saving processes and costs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An apparatus for preparing thermoplastic elastomers includes: an extruder mounting cylinder, an extruder assembly mounted on the output end of the extruder mounting cylinder, and a cutter assembly rotatably mounted on the output end of the extruder assembly; and further includes: The extrusion head assembly consists of multiple extrusion blocks, and each extrusion block is provided with an elastic adjustment hole assembly in the middle. The elastic adjustment hole assembly includes an elastic membrane tube and an aperture positioning plate surrounding the outer ring of the elastic membrane tube. The extrusion block has a through-hole for mounting the elastic membrane tube and the aperture positioning plate. The outer rings of the two end faces of the elastic membrane tube are respectively connected to the corresponding end faces of the extrusion block. The outer ring of the aperture positioning plate is fitted with an adjustment cylinder that moves axially along the elastic membrane tube. The contact surface between the adjustment cylinder and the aperture positioning plate is an inclined surface.

[0006] In a preferred embodiment of the thermoplastic elastomer preparation apparatus provided by the present invention, the aperture positioning plate has an arc-shaped structure on the side near the elastic membrane cylinder, and multiple aperture positioning plates are provided and are installed around the outer ring of the elastic membrane cylinder.

[0007] In a preferred embodiment of the thermoplastic elastomer preparation device provided by the present invention, a wedge block is fixed on the outer ring of each aperture positioning piece, and the inner wall of the adjusting cylinder has an inclined structure corresponding to the wedge block.

[0008] In a preferred embodiment of the thermoplastic elastomer preparation equipment provided by the present invention, the outer ring of the adjusting cylinder is fixed with a wedge-shaped pusher that slides laterally along the elastic membrane cylinder, and the outer end of the wedge-shaped pusher extends to the outside of the extrusion block.

[0009] In a preferred embodiment of the thermoplastic elastomer preparation equipment provided by the present invention, a plurality of extrusion blocks are arranged in a ring to form an extrusion head assembly, and the side of each extrusion block near the cutting blade assembly is a planar structure.

[0010] In a preferred embodiment of the thermoplastic elastomer preparation equipment provided by the present invention, an adjusting ring is rotatably connected to the extrusion head mounting cylinder about its axis, and a wedge-shaped top block corresponding to the wedge-shaped push block is fixed on the adjusting ring, and the contact surface between the wedge-shaped push block and the wedge-shaped top block is an inclined surface.

[0011] In a preferred embodiment of the thermoplastic elastomer preparation equipment provided by the present invention, a driving mechanism is installed on the adjusting ring for driving the adjustment to rotate around the axis of the extrusion head mounting cylinder.

[0012] In a preferred embodiment of the thermoplastic elastomer preparation device provided by the present invention, the driving mechanism includes an adjusting toothed ring rotatably connected to the outer wall of the extrusion head mounting cylinder, a guide magnet block mounted on the adjusting toothed ring, and a positioning magnet block on the adjusting ring corresponding to the guide magnet block, wherein the magnetic properties of the opposite surfaces of the guide magnet block and the positioning magnet block are opposite.

[0013] In a preferred embodiment of the thermoplastic elastomer preparation apparatus provided by the present invention, repulsive magnet blocks are installed on both sides of the guide magnet block on the adjusting toothed ring, and the opposing surfaces of the repulsive magnet blocks and the positioning magnet blocks have the same magnetism.

[0014] In a preferred embodiment of the thermoplastic elastomer preparation device provided by the present invention, there is a gap between the adjusting ring and the adjusting toothed ring, and a driving member is engaged on the outer side of the adjusting toothed ring by teeth.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a thermoplastic elastomer preparation device in which molten raw material passes through one end of the extrusion head mounting cylinder, passes through the extrusion head assembly, and is cut by the rotating cutting blade assembly. The raw material is discharged through the elastic adjustment hole assembly on each extrusion block. The diameter of the hole through which the raw material passes on each extrusion block can be adjusted by the elastic adjustment hole assembly with adjustable hole diameter. This can adjust the hole size of the raw material particles, avoid the need to replace each extrusion block and the entire extrusion head assembly, save processes and reduce costs.

[0016] 2. The present invention provides a thermoplastic elastomer preparation device in which molten raw material is discharged through an elastic membrane tube on an extrusion block. The elastic membrane tube is made of high-temperature resistant, high-performance rubber. Multiple aperture positioning plates are installed on the outer ring of the elastic membrane tube, and the position of the adjusting cylinder is adjusted along the axis of the elastic membrane tube to move the multiple aperture positioning plates toward the center, thereby controlling the aperture of the elastic membrane tube to shrink. Alternatively, the adjusting cylinder can be moved so that its inner cavity is away from the inclined surface of the aperture positioning plate to adjust the outward expansion range of the aperture positioning plate. When the raw material passes through the center of the elastic membrane tube, the outer wall of the elastic membrane tube is squeezed to fit against the inner wall of the aperture positioning plate, thereby increasing the diameter of the raw material passing through the elastic membrane tube and facilitating flexible adjustment.

[0017] 3. The thermoplastic elastomer preparation equipment provided by the present invention drives the guide magnet block to move by adjusting the rotation of the toothed ring. The magnetic attraction between the opposite surfaces of the guide magnet block and the positioning magnet block drives the adjustment ring to rotate synchronously. Multiple guide magnet blocks and positioning magnet blocks can be set so that the toothed ring stably drives the adjustment ring to rotate synchronously. The rotating adjustment ring drives multiple wedge-shaped top blocks to move synchronously. The wedge-shaped top blocks push the wedge-shaped push block to move along the axis of the elastic membrane cylinder, thereby controlling the position of the adjustment cylinder. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the position structure of the extrusion head mounting cylinder and the extrusion block provided by the present invention; Figure 3 This is a front view provided for the present invention; Figure 4 A schematic diagram of the extrusion block, adjusting ring, and adjusting toothed ring provided by the present invention; Figure 5 A schematic diagram of the wedge-shaped top block and wedge-shaped push block structure provided by the present invention; Figure 6 This is a schematic diagram of the internal structure of the extruded block provided by the present invention; Figure 7 This is a schematic diagram of the aperture positioning plate and adjusting cylinder structure provided by the present invention; Figure 8 This is a schematic diagram of the drive mechanism structure provided by the present invention.

[0020] The markings in the diagram are explained as follows: 1. Extruder mounting cylinder; 2. Extruder assembly; 3. Cutting blade assembly; 4. Extrusion block; 5. Elastic adjustment hole assembly; 6. Adjusting toothed ring; 7. Elastic membrane cylinder; 8. Aperture positioning plate; 9. Wedge block; 10. Adjusting cylinder; 11. Wedge push block; 12. Adjusting ring; 13. Wedge top block; 14. Mounting cavity; 15. Repulsion magnet block; 16. Guide magnet block; 17. Positioning magnet block. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0022] As described in the background art, when producing raw materials with different aperture sizes, it is necessary to replace the extruder head with different discharge aperture sizes. This requires disassembling and assembling the extruder head components of the equipment, which is time-consuming. In addition, it is necessary to equip multiple extruder head assemblies with different aperture sizes, which will also increase the production cost.

[0023] For details, please refer to Figures 1 to 8 An apparatus for preparing thermoplastic elastomers includes: an extruder mounting cylinder 1, an extruder assembly 2 mounted on the output end of the extruder mounting cylinder 1, and a cutter assembly 3 rotatably mounted on the output end of the extruder assembly 2; and further includes: The extrusion head assembly 2 is composed of multiple extrusion blocks 4, and each extrusion block 4 is provided with an elastic adjustment hole assembly 5 in the middle. The elastic adjustment hole assembly 5 includes an elastic membrane cylinder 7 and an aperture positioning piece 8 surrounding the outer ring of the elastic membrane cylinder 7. The extrusion block 4 has a through-hole for mounting the elastic membrane cylinder 7 and the aperture positioning piece 8. The outer rings of the two end faces of the elastic membrane cylinder 7 are respectively connected to the corresponding end faces of the extrusion block 4. The outer ring of the aperture positioning piece 8 is fitted with an adjustment cylinder 10 that moves axially along the elastic membrane cylinder 7. The contact surface between the adjustment cylinder 10 and the aperture positioning piece 8 is an inclined surface.

[0024] The present invention provides a thermoplastic elastomer preparation device. Molten raw material passes through one end of the extruder mounting cylinder 1, through the extruder assembly 2, and is cut by the rotating cutter assembly 3. The raw material is discharged through the elastic adjustment hole assembly 5 on each extruder block 4. The diameter of the hole through which the raw material passes on each extruder block 4 can be adjusted by the elastic adjustment hole assembly 5, which has an adjustable diameter. This can adjust the size of the pores of the raw material particles, avoid the need to replace each extruder block 4 and the entire extruder assembly 2, save processes and reduce costs.

[0025] The molten raw material is discharged through the elastic membrane cylinder 7 on the extrusion block 4. The elastic membrane cylinder 7 is made of high-temperature resistant high-performance rubber. Multiple aperture positioning plates 8 are installed on the outer ring of the elastic membrane cylinder 7. By adjusting the position of the adjusting cylinder 10 along the axis of the elastic membrane cylinder 7, the multiple aperture positioning plates 8 are moved towards the center, thereby controlling the aperture of the elastic membrane cylinder 7 to shrink. The adjusting cylinder 10 can also be moved so that its inner cavity is away from the inclined surface of the aperture positioning plate 8, adjusting the outward expansion range of the aperture positioning plate 8. When the raw material passes through the center of the elastic membrane cylinder 7, the outer wall of the elastic membrane cylinder 7 is squeezed to fit against the inner wall of the aperture positioning plate 8, thereby increasing the diameter of the raw material passing through the elastic membrane cylinder 7, which facilitates flexible adjustment.

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0027] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Example

[0029] Please refer to Figures 1 to 3An apparatus for preparing thermoplastic elastomers includes an extrusion head assembly 2 mounted on the output end of an extrusion head mounting cylinder 1, a cutter assembly 3 rotatably mounted on the output end of the extrusion head assembly 2, and further includes: the extrusion head assembly 2 is composed of multiple extrusion blocks 4, each extrusion block 4 having an elastic adjustment hole assembly 5 in its center, the raw material being discharged through the elastic adjustment hole assembly 5 on each extrusion block 4, and the aperture through which the raw material passes on each extrusion block 4 can be adjusted by the elastic adjustment hole assembly 5 with adjustable aperture, thereby adjusting the aperture size of the raw material particles, avoiding the need to replace each extrusion block 4 and the entire extrusion head assembly 2, saving processes and costs.

[0030] It is worth mentioning that, such as Figures 4 to 7 As shown, the elastic adjustment orifice assembly 5 includes an elastic membrane cylinder 7 and an aperture positioning plate 8 surrounding the outer ring of the elastic membrane cylinder 7. The aperture positioning plate 8 has an arc-shaped structure on the side near the elastic membrane cylinder 7. Multiple aperture positioning plates 8 are provided and are installed around the outer ring of the elastic membrane cylinder 7. By providing multiple arc-shaped aperture positioning plates 8 around the outer ring of the elastic membrane cylinder 7, it is convenient to control the diameter of the elastic membrane cylinder 7 by controlling the multiple aperture positioning plates 8 to move towards the center or outward. The extrusion block 4 has a through-hole for installing the elastic membrane cylinder 7 and the aperture positioning plate 8, which facilitates the installation of the elastic membrane cylinder 7 and the aperture positioning plate 8 in the installation cavity 14 and facilitates the adjustment of the position of the aperture positioning plate 8. The outer rings of the two end faces of the elastic membrane cylinder 7 are respectively connected to the corresponding end faces of the extrusion block 4, so that after the raw material flows to the extrusion block 4, it can enter one end of the elastic membrane cylinder 7 and flow out through the other end.

[0031] In addition, such as Figure 6 and Figure 7 As shown, the outer ring of the aperture positioning piece 8 is fitted with an adjusting cylinder 10 that moves axially along the elastic membrane cylinder 7. The contact surface between the adjusting cylinder 10 and the aperture positioning piece 8 is an inclined surface, which facilitates the adjustment of the aperture positioning piece 8 to shrink towards the center or expand outward by controlling the movement of the adjusting cylinder 10 along the axis of the elastic membrane cylinder 7. Each aperture positioning piece 8 has a wedge block 9 fixed on its outer ring. The inner wall of the adjusting cylinder 10 has an inclined structure corresponding to the wedge block 9, which can push the wedge block 9 and the aperture positioning piece 8 to move radially along the elastic membrane cylinder 7 by moving the adjusting cylinder 10.

[0032] In this embodiment, as Figure 6 and Figure 7 As shown, a wedge-shaped pusher 11 that slides laterally along the elastic membrane cylinder 7 is fixed on the outer ring of the adjusting cylinder 10. The wedge-shaped pusher 11 extends to the outside of the extrusion block 4. The position of the adjusting cylinder 10 in the middle of the extrusion block 4 can be adjusted by moving the wedge-shaped pusher 11, which facilitates control.

[0033] And, as Figure 4 and Figure 5As shown, multiple extrusion blocks 4 are arranged in a ring to form an extrusion head assembly 2. Each extrusion block 4 has a planar structure on the side near the cutting blade assembly 3, which facilitates the cutting of the raw material discharged from the ring-arranged extrusion blocks 4 by the cutting blade on the outside of the rotating cutting blade assembly 3. An adjusting ring 12 is rotatably connected to the extrusion head mounting cylinder 1 around its axis. A wedge-shaped top block 13 corresponding to the wedge-shaped push block 11 is fixed on the adjusting ring 12. The contact surface between the wedge-shaped push block 11 and the wedge-shaped top block 13 is an inclined surface. By rotating the adjusting ring 12, multiple wedge-shaped top blocks 13 are driven to move synchronously, and the wedge-shaped push block 11 is pushed along the axis of the elastic membrane cylinder 7 by the wedge-shaped top block 13, thereby controlling the position of the adjusting cylinder 10. Example

[0034] The equipment for preparing a thermoplastic elastomer provided in Example 1 has been further optimized, specifically, as follows: Figure 4 and Figure 8 As shown, a driving mechanism is installed on the adjusting ring 12 to drive the adjusting ring 12 to rotate around the axis of the extrusion head mounting cylinder 1. The driving mechanism includes an adjusting toothed ring 6 rotatably connected to the outer wall of the extrusion head mounting cylinder 1, a guide magnet block 16 installed on the adjusting toothed ring 6, and a positioning magnet block 17 on the adjusting ring 12 corresponding to the guide magnet block 16. The opposing surfaces of the guide magnet block 16 and the positioning magnet block 17 have opposite magnetic properties. The rotation of the adjusting toothed ring 6 drives the guide magnet block 16 to move. The magnetic attraction between the opposing surfaces of the guide magnet block 16 and the positioning magnet block 17 synchronously drives the adjusting ring 12 to rotate. Multiple guide magnet blocks 16 and positioning magnet blocks 17 can be set to ensure that the adjusting toothed ring 6 stably drives the adjusting ring 12 to rotate synchronously.

[0035] Preferred, such as Figure 8 As shown, repulsive magnet blocks 15 are installed on both sides of the guide magnet block 16 on the adjusting gear ring 6. The opposing surfaces of the repulsive magnet blocks 15 and the positioning magnet blocks 17 have the same magnetism. In order to achieve precise control of the movement of the adjusting ring 12, the repulsive magnet blocks 15 on both sides repel the positioning magnet blocks 17, so that the positioning magnet blocks 17 are always facing the guide magnet blocks 16 on the adjusting gear ring 6, and the adjusting ring 12 is driven to move precisely through the adjusting gear ring 6.

[0036] Furthermore, there is a gap between the adjusting ring 12 and the adjusting toothed ring 6. The outer side of the adjusting toothed ring 6 is engaged with a driving component through teeth. The adjusting toothed ring 6 is embedded in the outer ring of the extruder mounting cylinder 1 and is installed without contact with the adjusting ring 12, ensuring the airtightness of the cavity in the extruder mounting cylinder 1.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the scope of the patent. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this invention.

Claims

1. An apparatus for preparing thermoplastic elastomers, comprising: An extruder mounting cylinder (1), wherein an extruder assembly (2) is mounted on the output end of the extruder mounting cylinder (1), and a cutter assembly (3) is rotatably mounted on the output end of the extruder assembly (2), characterized in that it further comprises: The extrusion head assembly (2) consists of multiple extrusion blocks (4), and each extrusion block (4) is provided with an elastic adjustment hole assembly (5) in the middle. The elastic adjustment hole assembly (5) includes an elastic membrane cylinder (7) and an aperture positioning piece (8) surrounding the outer ring of the elastic membrane cylinder (7). The extrusion block (4) has a through-hole for mounting the elastic membrane cylinder (7) and the aperture positioning piece (8). The outer rings of the two end faces of the elastic membrane cylinder (7) are respectively connected to the corresponding end faces of the extrusion block (4). The outer ring of the aperture positioning piece (8) is fitted with an adjustment cylinder (10) that moves along the axial direction of the elastic membrane cylinder (7). The contact surface between the adjustment cylinder (10) and the aperture positioning piece (8) is an inclined surface. An adjusting ring (12) is rotatably connected to the extrusion head mounting cylinder (1) around its axis. A wedge-shaped top block (13) corresponding to the wedge-shaped push block (11) is fixed on the adjusting ring (12). The contact surface between the wedge-shaped push block (11) and the wedge-shaped top block (13) is an inclined surface. The adjusting ring (12) is equipped with a driving mechanism for driving the adjusting ring (12) to rotate around the axis of the extrusion head mounting cylinder (1); The driving mechanism includes an adjusting toothed ring (6) rotatably connected to the outer wall of the extrusion head mounting cylinder (1), a guide magnet block (16) mounted on the adjusting toothed ring (6), and a positioning magnet block (17) on the adjusting ring (12) corresponding to the guide magnet block (16), and the opposite magnetic surfaces of the guide magnet block (16) and the positioning magnet block (17) are opposite.

2. The apparatus for preparing thermoplastic elastomers according to claim 1, characterized in that, The aperture positioning piece (8) has an arc-shaped structure on the side near the elastic membrane cylinder (7). Multiple aperture positioning pieces (8) are provided and are installed around the outer ring of the elastic membrane cylinder (7).

3. The apparatus for preparing thermoplastic elastomers according to claim 2, characterized in that, Each aperture positioning piece (8) has a wedge block (9) fixed on its outer ring, and the inner wall of the adjusting cylinder (10) has an inclined structure corresponding to the wedge block (9).

4. The apparatus for preparing a thermoplastic elastomer according to claim 3, characterized in that, The outer ring of the adjusting cylinder (10) is fixed with a wedge-shaped pusher (11) that slides laterally along the elastic membrane cylinder (7), and the outer end of the wedge-shaped pusher (11) extends to the outside of the extrusion block (4).

5. The apparatus for preparing a thermoplastic elastomer according to claim 4, characterized in that, Multiple extrusion blocks (4) are arranged in a ring to form an extrusion head assembly (2), and each extrusion block (4) has a planar structure on the side near the cutter assembly (3).

6. The apparatus for preparing thermoplastic elastomers according to claim 1, characterized in that, On the adjusting toothed ring (6), repulsive magnet blocks (15) are installed on both sides of the guide magnet block (16), and the opposing surfaces of the repulsive magnet block (15) and the positioning magnet block (17) have the same magnetism.

7. The apparatus for preparing a thermoplastic elastomer according to claim 6, characterized in that, There is a gap between the adjusting ring (12) and the adjusting toothed ring (6), and the outer side of the adjusting toothed ring (6) is engaged with a driving member by teeth.

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