Granulation mold, granulation mold device and thermoplastic elastomer granulation system

Abstract

The utility model provides a granulation mold, a granulation mold device and a thermoplastic elastomer granulation system.The granulation mold is applied to the thermoplastic elastomer granulation system.The thermoplastic elastomer granulation system comprises a double-screw extruder and an underwater granulator, the granulation mold is assembled between the double-screw extruder and the underwater granulator, and the underwater granulator is arranged between the double-screw extruder and the underwater granulator. The granulation mold is characterized in that the granulation mold comprises a mold body and a plurality of mold holes, the mold holes penetrate through the surfaces of the two sides of the mold body, and at least two mold holes are different in shape. According to the present invention, the granulation mold comprises the plurality of mold holes, and the shapes of the at least two mold holes are different, such that the thermoplastic elastomer particles with different shapes can be directly produced, the production steps are simplified, and the production efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of polymer materials, and more specifically, relates to a granulation mold, a granulation mold device and a thermoplastic elastomer granulation system. Background Art

[0002] Thermoplastic elastomer is a polymer material that has the properties of both plastic and rubber. It shows the high elasticity of rubber at room temperature, and can be plasticized and formed at high temperature. This material has good properties such as good resilience and slip resistance. It can recover by itself and has a non-slip surface during use. It is a key material for the substrate of playgrounds. However, the production of playground substrates requires the use of irregular thermoplastic elastomer granules. At present, irregular thermoplastic elastomer granulation devices still have technical problems such as complex granulation steps and low efficiency. Therefore, how to improve the production efficiency of thermoplastic elastomer granules is a technical problem that needs to be solved urgently. Utility Model Content

[0003] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a granulation die, which is applied to a thermoplastic elastomer granulation system, wherein the thermoplastic elastomer granulation system comprises: a twin-screw extruder and an underwater granulator, wherein the granulation die is assembled between the extruder and the underwater granulator, and wherein the granulation die comprises: a die body, and

[0004] A plurality of mold holes are provided, wherein the plurality of mold holes penetrate through the two side surfaces of the mold body, and at least two mold holes have different shapes.

[0005] In a possible implementation, the size of the mold hole is 1 to 4 mm.

[0006] In a possible implementation, the shapes of the mold holes include: irregular triangles, quadrilaterals, pentagons, hexagons, closed curves, and curved polygons.

[0007] Please provide a second aspect of a granulation mold device, including the granulation mold, as well as a mold movable cover plate, a mold positioning plate and a mold positioning bolt, wherein the granulation mold, the mold movable cover plate and the mold positioning plate are fixedly connected in sequence by the mold positioning bolts.

[0008] In a possible implementation, the granulation mold device further includes: an upper mold heating plate and a lower mold heating plate, and the upper mold heating plate and the lower mold heating plate are respectively mounted on the upper and lower ends of the granulation mold.

[0009] In a possible implementation, the granulation mold device further includes: a temperature-sensing thermocouple, and the temperature-sensing thermocouple is assembled in the granulation mold and the mold movable cover plate.

[0010] A third aspect of the present application provides a thermoplastic elastomer granulation system, characterized in that it includes a twin-screw extruder, an underwater pelletizer and the granulation mold device as described above, wherein the granulation mold device is assembled between the extruder and the underwater pelletizer.

[0011] In a possible implementation, the underwater pelletizer includes: a driving device, an underwater cutting knife and a cooling water pipe, wherein the cooling water pipe is vertically connected to the underwater cutting connection flange and connected to an external water circulation system.

[0012] In a possible implementation, the temperature of water flowing through the cooling water pipe is 5-15°C.

[0013] In a possible implementation, the twin-screw extruder includes: a twin-screw extruder body, a melt pump, and a discharge valve, and the twin-screw extruder body, the melt pump, and the discharge valve are fixedly connected by bolts.

[0014] Technical Effects

[0015] The granulation die provided by the present application comprises a plurality of die holes, and at least two die holes have different shapes, so that thermoplastic elastomers of different shapes can be produced. When the granulation die provided by the present application is used in conjunction with a twin-screw extruder and an underwater pelletizer, the product extruded by the extruder can be plasticized to obtain extrudates of various shapes, and the extrudate can be cut and cooled in time in conjunction with the underwater pelletizer to obtain a granular thermoplastic elastomer. The use of the granulation die provided by the present application can reduce the use of a drawbar tractor, a cutting machine, a cooling water tank, and a crusher, reduce production costs, simplify production steps, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 A schematic diagram of the structure of a granulation mold provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the structure of a thermoplastic elastomer granulation system provided in an embodiment of the present application;

[0019] Figure 3 A schematic diagram of the installation structure of the granulation mold device provided in an embodiment of the present application;

[0020] Reference numerals in the figures:

[0021] Twin-screw extruder 1, underwater pelletizer 2, pelletizing mold device 3, pelletizing mold 4, discharge valve 5, melt pump 6, cooling water pipe 7, underwater cutting knife 8, drive device 9, connecting flange 10, mold movable cover 11, mold positioning plate -12, mold upper heating plate 13, mold positioning bolt 14, mold lower heating plate 15, temperature sensing thermocouple 16, mold hole 17. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] Thermoplastic elastomer is a polymer material that has the properties of both plastic and rubber. It shows the high elasticity of rubber at room temperature, and can be plasticized and formed at high temperature. This material has good properties such as good resilience and slip resistance, and can recover by itself and resist slipping on the surface during use. However, the current thermoplastic elastomer granulation device still has the technical problems of complex granulation steps and low efficiency. Therefore, how to improve the production efficiency of thermoplastic elastomer granules is a technical problem that needs to be solved urgently.

[0027] In order to solve the above problems, the present application provides a granulation die, comprising a plurality of die holes, and at least two die holes have different shapes, so that thermoplastic elastomers of different shapes can be produced. When the granulation die provided by the present application is used in conjunction with a twin-screw extruder and an underwater pelletizer, the product extruded by the extruder can be plasticized to obtain extrudates of various shapes, and the extrudate can be cut and cooled in time with the underwater pelletizer to obtain a granular thermoplastic elastomer. The use of the granulation die provided by the present application can reduce the use of a strip tractor, a cutter, and a crusher, reduce production costs, simplify production steps, and improve production efficiency.

[0028] In order to illustrate the technical solution of the present application, specific embodiments are provided below.

[0029] See also Figure 1 The structural schematic diagram of a granulation mold 4 is shown as an example but not a limitation, comprising: a mold body, and a plurality of mold holes 17, wherein the plurality of mold holes 17 penetrate through both side surfaces of the mold body, and at least two mold holes 17 have different shapes.

[0030] It should be noted that the granulation die 4 is applied to the thermoplastic elastomer granulation system, see Figure 2 The thermoplastic elastomer granulation system comprises: a twin-screw extruder 1 and an underwater granulator 2 , and the granulation die 4 is assembled between the twin-screw extruder 1 and the underwater granulator 2 .

[0031] The granulation die 4 in this scheme is designed based on the process requirements of the thermoplastic elastomer granulation system. After the thermoplastic elastomer is heated, mixed and extruded in the extruder, a continuous material flow is formed. Furthermore, when the material flow passes through the granulation die 4, it is constrained and shaped by the die hole 17, thereby forming an extrudate of a specific shape. Subsequently, these extrudates are cut into granules under the action of the underwater pelletizer 2 and cooled to form a solidified shape.

[0032] The following effects can be achieved by using the granulation mold provided by the present application.

[0033] First, the granulation die provided by the present application can realize the diversified production of thermoplastic elastomer particles. By setting the die holes 17 of different shapes on the same die, the granulation die can simultaneously produce thermoplastic elastomer particles of various shapes, meeting the market demand for particles of different shapes.

[0034] Second, the granulation mold provided by the present application can reduce production costs. The traditional granulation process generally requires strip pulling, and uses a strip pulling machine, a cutting machine, and a crusher. Multiple machines are used in combination to produce thermoplastic elastomer particles of various shapes. The equipment is complex and the maintenance cost is high. The granulation mold in this solution can achieve rapid production of thermoplastic elastomer particles of different shapes on one device, reducing equipment costs.

[0035] Third, the granulation mold provided by the present application can simplify the production steps and improve production efficiency. The traditional thermoplastic elastomer granulation process may require the cooperation of multiple equipment such as a strip tractor, a cutter, and a crusher, and the production steps are complicated. The combination of the granulation mold and the underwater pelletizer in this solution simplifies the production steps and makes the production process more continuous and efficient.

[0036] In summary, the present application realizes diversified production of thermoplastic elastomer particles, reduces production costs, improves production efficiency, and simplifies production steps by designing a granulation mold 4 with multiple mold holes 17 of different shapes.

[0037] In a possible implementation, the size of the mold hole 17 is 1 to 4 mm.

[0038] It should be noted that the die hole 17 should not be too large or too small. A too small die hole 17 may make it difficult for the material to pass through, affecting production efficiency; while an overly large die hole 17 may lead to insufficient compaction of the particles, and an overly large die hole 17 will make the diameter of the extrudate larger, and the subsequent cooling effect may be poor, which will lead to the inability to solidify the particle shape. Under appropriate process conditions, by setting the size of the die hole 17, the size of the produced particles can be accurately controlled and the material can be extruded smoothly.

[0039] In a possible implementation, the shapes of the mold holes 17 include irregular triangles, quadrilaterals, pentagons, hexagons, and curved polygons.

[0040] See also Figure 1 In this embodiment, the mold holes include triangular mold holes, quadrilateral mold holes, pentagonal mold holes, hexagonal mold holes and curved polygonal mold holes.

[0041] It should be noted that the diverse shapes of die holes can produce particles of different shapes. The contact between particles of different shapes is no longer a simple point-to-point contact, but a more complex and diverse contact form. These contact points may include point-to-surface contact, surface-to-surface contact, and multi-point contact, thereby increasing the contact stability between particles and the strength of the overall structure. In addition, die holes of various shapes can be flexibly adjusted according to different product requirements and process conditions, making the mold design more targeted and practical.

[0042] The embodiment of the present application also provides a granulation mold device 3, including the granulation mold 4 as described above, as well as a mold movable cover plate 11, a mold positioning plate 12 and a mold positioning bolt 14, wherein the granulation mold 4, the mold movable cover plate 11, and the mold positioning plate 12 are fixedly connected in sequence by the mold positioning bolts 14.

[0043] It should be noted that by designing the granulation mold 4, the mold movable cover plate 11, and the mold positioning plate 12 as detachable modules and using the mold positioning bolts 14 for fixed connection, the entire device can maintain a stable structure during operation.

[0044] Furthermore, since each component is detachably connected, the device can be easily adjusted or optimized when necessary. For example, the mold holes 17 of different shapes can be replaced according to different production requirements. This modular design not only improves production efficiency, but also facilitates maintenance and replacement of the equipment.

[0045] At the same time, the combination of the mold positioning plate 12 and the mold positioning bolts 14 ensures the precise positioning of each component during the assembly process. This precise positioning helps to reduce errors, improve the working accuracy of the granulation mold, and thus ensure the molding quality and size consistency of the particles.

[0046] In one possible implementation, see Figure 3 The granulation mold device 3 also includes: an upper mold heating plate 13 and a lower mold heating plate 15, and the upper mold heating plate 13 and the lower mold heating plate 15 are respectively assembled at the upper and lower ends of the granulation mold 4.

[0047] It should be noted that the heating plate can effectively control the temperature inside the granulation mold 4 to reach the optimal temperature range for material molding, which is crucial for ensuring the melting state and fluidity of the material and the final particle molding quality.

[0048] In a possible implementation, the granulation mold device 3 further includes: a temperature-sensing thermocouple 16 , and the temperature-sensing thermocouple 16 is assembled in the granulation mold 4 and the mold movable cover plate 11 .

[0049] In the granulation mold device 3, the temperature sensing thermocouple 16 is installed in the granulation mold 4 and the mold movable cover 11 to monitor the temperature in the granulation mold 4 and the mold movable cover 11 in real time, ensuring that the material is kept within a suitable temperature range during the processing. This is particularly important for the processing of heat-sensitive materials such as plastics, and helps prevent material quality degradation or processing failure due to excessively high or low temperatures.

[0050] In a possible implementation, by using in conjunction with the heating plate, the temperature sensing thermocouple 16 can accurately adjust the heating power of the heating plate according to the temperature data monitored in real time, ensuring that the temperature of each part in the mold is evenly distributed, optimizing the heating effect, and improving product quality. At the same time, accurate temperature control can reduce unnecessary energy waste, reduce production costs, and also help reduce environmental pollution caused by the decomposition of plastics due to high temperatures to produce small molecular harmful gases.

[0051] The present application also provides a thermoplastic elastomer granulation system, see Figure 2 , comprising a twin-screw extruder 1, an underwater pelletizer 2 and the pelletizing die device 3 as described above, wherein the pelletizing die device 3 is assembled between the twin-screw extruder 1 and the underwater pelletizer 2.

[0052] It should be noted that the thermoplastic elastomer granulation system is composed of a twin-screw extruder 1, an underwater pelletizer 2 and a pelletizing die device 3. When in use, the thermoplastic elastomer is heated, mixed and extruded in the extruder to form a continuous material flow. Further, when the material flow passes through the pelletizing die 4, it will be constrained and shaped by the die hole 17 to form an extrudate of a specific shape. Subsequently, these extrudates are cut into granules under the action of the underwater pelletizer 2 and cooled to form a solidified shape.

[0053] The thermoplastic elastomer granulation system provided in the present application can simultaneously produce thermoplastic elastomer particles of various shapes to meet the market demand for particles of different shapes.

[0054] Compared with the complex traditional granulation process, the thermoplastic elastomer granulation system in this scheme only needs to use a twin-screw extruder 1, an underwater pelletizer 2 and a pelletizing mold device 3 to achieve the production of thermoplastic elastomer particles of different shapes, reducing equipment costs, simplifying production steps, and improving production efficiency.

[0055] In a possible implementation, the underwater pelletizer 2 includes: a driving device 9, an underwater cutting knife 8 and a cooling water pipe 7. The cooling water pipe 7 is vertically connected to a connecting flange 10 and connected to an external water circulation system.

[0056] The twin-screw extruder 1 is the front end of the whole system, which is responsible for heating and melting the thermoplastic elastomer raw material and forming a continuous material flow through a strong extrusion force. When the material flow passes through the granulation die 4, it is constrained and shaped by the die hole 17, thereby forming an extrudate of a specific shape.

[0057] Next, these preliminarily formed extrudates are sent to the underwater pelletizer 2 for cutting and cooling. The underwater pelletizer 2 includes a drive device 9, an underwater cutter 8, and a cooling water pipe 7. The drive device 9 provides power to the underwater cutter 8 to ensure a stable and efficient cutting process; the underwater cutter 8 is responsible for cutting the pellets into more uniform and smaller sizes; the cooling water pipe 7 sprays cooling water into the cutting area to quickly reduce the temperature of the pellets to prevent them from deforming or sticking due to overheating.

[0058] It should be noted that the underwater pelletizer 2 not only ensures the shaping and uniformity of the pellets, but also effectively removes the debris generated during the cutting process through the flushing effect of the water flow, thereby ensuring the quality of the pellets. At the same time, the use of cooling water also greatly improves the production efficiency, so that the pellets have a good cooling effect when leaving the pelletizer, reducing the time and cost of subsequent processing.

[0059] In a possible implementation, the temperature of water flowing through the cooling water pipe 7 is 5-15°C.

[0060] It should be noted that cooling water can effectively reduce the temperature of the thermoplastic elastomer particles extruded from the granulation die device 3. Since the thermoplastic elastomer needs to undergo a high-temperature molten state during processing, the high-temperature particles are prone to deformation or adhesion when in contact with each other, so low-temperature cooling water is needed to quickly reduce the particle temperature to below the threshold of deformation and adhesion, thereby ensuring the integrity and independence of the particles. In addition, the appropriate cooling water temperature can quickly take away the heat on the surface of the particles, so that the particles can meet the cooling requirements in a shorter time, shorten the cooling time, and improve the production efficiency of the entire granulation system.

[0061] In a possible implementation, the twin-screw extruder 1 includes: a twin-screw extruder body, a melt pump 6 and a discharge valve 5, and the twin-screw extruder body, the melt pump 6 and the discharge valve 5 are fixedly connected by bolts.

[0062] It should be noted that the twin-screw extruder has two intermeshing screws, which can provide more powerful material conveying and mixing capabilities. This design allows the material to be sheared and mixed more evenly during the extrusion process, thereby improving the plasticization effect of the material and the quality of the product.

[0063] At the same time, the setting of the melt pump 6 can ensure that the material maintains a stable pressure and flow rate during the extrusion process, which helps to reduce extrusion instability caused by pressure fluctuations and improve the dimensional accuracy and consistency of the product.

[0064] Moreover, the use of the melt pump 6 and the discharge valve 5 can make the entire extrusion process more controllable. By adjusting the speed of the melt pump 6 and the opening of the discharge valve 5, the extrusion speed and output can be accurately controlled to meet different production requirements.

[0065] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the division of the above-mentioned functional units is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units in the embodiment can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0066] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0067] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0068] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A granulation die, applied to a thermoplastic elastomer granulation system, the thermoplastic elastomer granulation system comprising: A twin-screw extruder and an underwater pelletizer, wherein the pelletizing mold is installed between the twin-screw extruder and the underwater pelletizer, and is characterized in that the pelletizing mold comprises: a mold body, and a plurality of mold holes, wherein the plurality of mold holes penetrate the two side surfaces of the mold body, and at least two mold holes have different shapes.

2. The granulation mold according to claim 1, characterized in that The size of the die hole is 1 to 4 mm.

3. The granulation mold according to claim 1, characterized in that: The shapes of the mold holes include irregular quadrilaterals, pentagons, hexagons, triangles and curved polygons.

4. A granulation mold device, comprising the granulation mold according to claim 1, and a mold movable cover plate, a mold positioning plate and a mold positioning bolt, wherein: The granulating mold, the mold movable cover plate and the mold positioning plate are fixedly connected in sequence through the mold positioning bolts.

5. The granulation mold device according to claim 4, characterized in that: The granulation mold device further comprises: an upper mold heating plate and a lower mold heating plate, wherein the upper mold heating plate and the lower mold heating plate are respectively mounted on the upper and lower ends of the granulation mold.

6. The granulation mold device according to claim 4 or 5, characterized in that: The granulation mold device also includes: a temperature-sensing thermocouple, and the temperature-sensing thermocouple is assembled in the granulation mold and the mold movable cover plate.

7. A thermoplastic elastomer granulation system, characterized in that: It comprises a twin-screw extruder, an underwater pelletizer and a pelletizing die device as claimed in any one of claims 4 to 6, wherein the pelletizing die device is assembled between the extruder and the underwater pelletizer.

8. The thermoplastic elastomer granulation system according to claim 7, characterized in that: The underwater pelletizer comprises: a cooling water pipe, an underwater cutting knife, a driving device and a connecting flange.

9. The thermoplastic elastomer granulation system according to claim 8, characterized in that: The temperature of the water flowing through the cooling water pipe is 5-15°C.

10. The thermoplastic elastomer granulation system according to any one of claims 7 to 9, characterized in that: The twin-screw extruder comprises: a twin-screw extruder body, a melt pump and a discharge valve, and the twin-screw extruder body, the melt pump and the discharge valve are fixedly connected by bolts.

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