Mixing extrusion granulator applied to PVDF (Polyvinylidene Fluoride)
By setting up a flushing box and water-cooled flushing tube in the PVDF kneading and extrusion granulator, the problem of excessive temperature during the PVDF strip cutting process is solved, achieving more stable cutting and extending the equipment life.
Patent Information
- Application Number
- CN202421809227.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-29
AI Technical Summary
In the prior art, the PVDF strips are not sufficiently cooled during the cutting process, resulting in excessive temperatures, affecting cutting stability and equipment life.
A flushing box and a water-cooled flushing tube are installed at the bottom of the extruder main body. The water filter rate is accelerated by tilting the water filter mesh and telescopic components, and the PVDF strips and cutting parts are cooled using the water supply hose and water-cooled flushing tube.
It improves the stability of the cutting and granulation process, avoids overheating damage to the cutting knife, and extends the service life of the granulator.
Smart Images
Figure CN223058118U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of PVDF processing, and particularly relates to a kneading extrusion granulator applied to PVDF. Background Art
[0002] Polyvinylidene fluoride, abbreviated as PVDF, is a highly non-reactive thermoplastic fluoropolymer, soluble in strong polar solvents such as dimethylacetamide, with excellent properties such as anti-aging, chemical resistance, weather resistance, and ultraviolet radiation resistance. It can be used as an engineering plastic for making corrosion-resistant equipment for sealing rings, capacitors, and also as coating materials, insulating materials, and ion exchange membrane materials, etc. In the production and granulation process of PVDF, usually, the raw materials are first melted by an extruder and then extruded, and then the cooled extruded tubular or strip-shaped raw materials are cut into granules.
[0003] In the prior art, during the process of cutting the PVDF strips extruded from the extruder by a granulator, since the PVDF strips are not sufficiently cooled and the cutting knife and the PVDF strips are in long-term cutting friction and heat up, the temperature at the contact area between the PVDF strips and the cutting knife is too high, affecting the stability of cutting during the granulation process, resulting in uneven granulation and short service life of the equipment. Summary of the Utility Model
[0004] In view of the above problems, the embodiments of the present application provide a kneading extrusion granulator applied to PVDF, which can effectively reduce the temperature at the contact area between the PVDF strips and the cutting knife, improve the stability during the cutting and granulation process, and at the same time extend the service life of the granulator.
[0005] According to one aspect of the embodiments of the present application, a kneading extrusion granulator applied to PVDF is provided. The kneading extrusion granulator applied to PVDF includes an extruder main body, a plurality of discharge ports are provided at the end of the extruder main body, a cutting component is provided at the discharge ports, a flushing box is provided at the bottom of the extruder main body, a water filtering mesh plate is inclined in the flushing box, the bottom of the water filtering mesh plate is connected to the bottom wall of the flushing box through a plurality of telescopic components, a discharge hole is opened on one side of the bottom wall of the flushing box, a discharge pipe is communicated at the bottom of the discharge hole, the lower end of the water filtering mesh plate extends downward to the discharge hole, a plurality of water-cooled flushing pipes are provided in the flushing box, the tops of the plurality of water-cooled flushing pipes form a water outlet end, the water outlet end extends upward to the discharge port, and the bottom end of the water-cooled flushing pipe penetrates downward and extends to the bottom of the flushing box and is then communicated with a water supply hose.
[0006] In some embodiments, an installation groove is formed at the top of the flushing tank, the end of the extruder body is inserted into the installation groove, a water seal rubber ring is arranged between the inner side wall of the extruder body and the installation groove, and the installation groove and the extruder body are connected by a plurality of bolts.
[0007] In some embodiments, a plurality of hooks are symmetrically arranged at the bottom of the discharge pipe, and the plurality of hooks are jointly used for hanging an aggregate bag.
[0008] In some embodiments, the downward inclination amplitude of the lower end of the water filtering mesh plate gradually becomes smaller until the water filtering mesh plate is in a horizontal state when it extends to the discharge hole.
[0009] In some embodiments, a water baffle is arranged at one side of the bottom of the water filtering mesh plate near one end of the discharge hole, the length direction of the water baffle coincides with the width direction of the water filtering mesh plate, and the water baffle extends from one side of the water filtering mesh plate to the other side.
[0010] In some embodiments, a cooling and recycling system is included. The cooling and recycling system includes a circulating water tank, a heat exchanger is arranged in the circulating water tank, a water collecting tank is formed by the downward depression of the bottom of the flushing tank, the water collecting tank is communicated with the circulating water tank, a water pump is arranged at the circulating water tank, and the water pump is communicated with the water supply hose.
[0011] The beneficial effects in the present application are as follows: In the present application, by arranging a flushing tank at the bottom of the extruder body, a wrapping effect is achieved, avoiding the overflow of liquid water and the splashing of PVDF particles to the outside during the working process. By arranging the water filtering mesh plate obliquely and connecting a telescopic component at the bottom of the water filtering mesh plate, the water filtering rate of the PVDF particles is accelerated under the drive of the telescopic component, and the blockage phenomenon can be effectively avoided. On the other hand, by arranging components such as a water supply hose and a water-cooled flushing pipe in the present application, the external cooling water can be pumped into the flushing tank during the working process of the equipment, so as to cool the PVDF strip and the cutting component, making the PVDF strip easy to cut, improving the stability during the cutting and granulation process, and avoiding the overheating and damage of the cutting knife, thereby prolonging the overall service life of the granulator.
[0012] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically given below. Description of the Drawings
[0013] Various other advantages and benefits will become clear to those of ordinary skill in the art by reading the following detailed description of the preferred embodiments. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Also, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:
[0014] Figure 1 FIG. 4 is a schematic diagram of the overall structure of a kneading and extrusion granulator applied to PVDF according to an embodiment of the present application;
[0015] Figure 2 FIG. 5 is a schematic diagram of the structure at the end face of the extruder body according to an embodiment of the present application.
[0016] The reference numerals in the specific embodiments are as follows:
[0017] A kneading and extrusion granulator 100 applied to PVDF, an extruder body 110, a discharge port 111, a cutting member 112, a flushing tank 120, a discharge hole 121, a discharge pipe 122, a hook 122a, a water-cooled flushing pipe 123, a water outlet end 123a, a water supply hose 124, a mounting groove 125, a water seal rubber ring 126, a water collecting tank 127, a water filtering mesh plate 130, a water baffle 131, a telescopic assembly 140, a cooling and recycling system 150, a circulation water tank 151, a heat exchanger 152, a water pump 153. Specific Embodiments
[0018] The embodiments of the technical solution of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and cannot be used to limit the protection scope of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art belonging to the technical field of the present application; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion.
[0019] Specifically, please refer to Figure 1 and Figure 2 , Figure 1 FIG. 4 is a schematic diagram of the overall structure of a kneading and extrusion granulator applied to PVDF according to an embodiment of the present application, Figure 2This is a schematic structural diagram of the end face of the extruder body provided by the embodiments of the present application. The mixing and extrusion granulator 100 for PVDF includes an extruder body 110. A plurality of discharge ports 111 are provided at the end of the extruder body 110, and a cutting component 112 is provided at the discharge ports 111. In the embodiments of the present application, both the extruder body and the cutting component 112 can be arranged by using the prior art. Specifically, during the working process, the extruder body extrudes the molten PVDF into a long strip shape, and then the cutting component 112 rotates to cut and granulate the long strip-shaped PVDF. A flushing box 120 is provided at the bottom of the extruder body 110, and the flushing box 120 is in a semi-surrounding state and wraps the end of the extruder body 110. A water filtering mesh plate 130 is inclined in the flushing box 120. The PVDF particles formed after being cut by the cutting component 112 and the water flowing out of the water-cooling flushing pipe 123 will both fall onto the water filtering mesh plate 130. After the water passes through the water filtering mesh plate 130, it falls into the flushing box 120. The PVDF particles roll downward on the water filtering mesh plate 130, thereby completing the separation of water and PVDF particles. The bottom of the water filtering mesh plate 130 is connected to the bottom wall of the flushing box 120 through a plurality of telescopic components 140. During the working process, the telescopic components 140 continuously reciprocate to achieve elongation and retraction, so as to drive the water filtering mesh plate 130 to vibrate. On the one hand, the water filtering effect is increased, and on the other hand, it is avoided that PVDF particles stay on the top of the water filtering mesh plate 130 and cause blockage. An outlet hole 121 is opened on one side of the bottom wall of the flushing box 120, and a discharge pipe 122 is connected to the bottom of the outlet hole 121. The lower end of the water filtering mesh plate 130 extends downward to the outlet hole 121. The PVDF particles on the top of the water filtering mesh plate 130 will fall into the outlet hole 121 and finally be discharged to the outside of the main body of the equipment through the discharge pipe 122 for bagging. A plurality of water-cooling flushing pipes 123 are arranged in the flushing box 120. The tops of the plurality of water-cooling flushing pipes 123 form a water outlet end 123a, and the water outlet end 123a extends upward to the discharge port 111. The bottom end of the water-cooling flushing pipe 123 penetrates downward and extends to the bottom of the flushing box 120 and is then connected to a water supply hose 124. The water supply hose 124 sends the external low-temperature water pump 153 into the water-cooling flushing pipe 123. Then, the water-cooling flushing pipe 123 sprays the low-temperature water upward to the contact part between the PVDF strip and the cutting component 112. On the one hand, the PVDF strip is cooled so that the PVDF strip is easy to cut. On the other hand, the cutting component 112 is cooled, and the overheating phenomenon caused by long-term friction of the cutting knife is reduced. Further, the stability during the cutting and granulation process will be improved, and at the same time, the service life of the granulator will be extended.
[0020] As can be seen from the above, in the embodiments of the present application, by arranging the flushing tank 120 at the bottom of the extruder main body 110, it plays a wrapping role to prevent the liquid water from overflowing and the PVDF particles from splashing to the outside during the working process. By arranging the water filtering mesh plate 130 in an inclined manner and connecting the telescopic assembly 140 at the bottom of the water filtering mesh plate 130, the water filtering rate of the PVDF particles is accelerated under the drive of the telescopic assembly 140, and the blockage phenomenon can be effectively avoided at the same time. On the other hand, in the present application, by arranging components such as the water supply hose 124 and the water-cooled flushing pipe 123, the external cooling water pump 153 can be sent into the flushing tank 120 during the working process of the equipment, so as to cool the PVDF strip and the cutting component 112, making the PVDF strip easy to cut, improving the stability during the cutting and granulation process, and avoiding the overheating and damage of the cutting knife while prolonging the overall service life of the granulator.
[0021] In some embodiments, an installation groove 125 is formed at the top of the flushing tank 120, and the end of the extruder main body 110 is inserted into the installation groove 125. A water seal rubber ring 126 is arranged between the inner side wall of the extruder main body and the installation groove 125, and the installation groove 125 and the extruder main body 110 are connected by a plurality of bolts. In the embodiments of the present application, through the above arrangement, the flushing tank 120 and the extruder main body 110 are detachably connected, and only need to be screwed to facilitate disassembly. On the other hand, the arrangement of the water seal rubber ring 126 effectively improves the sealing performance at the connection between the extruder main body 110 and the flushing tank 120, avoiding the water leakage phenomenon.
[0022] In some embodiments, a plurality of hooks 122a are symmetrically arranged at the bottom of the discharge pipe 122, and the plurality of hooks 122a are jointly used for hanging an aggregate bag. In the embodiments of the present application, by arranging the hooks 122a, it is convenient to hang the collection bag at the discharge pipe 122.
[0023] In some embodiments, the downward inclination amplitude of the lower end of the water filtering mesh plate 130 gradually becomes smaller until the water filtering mesh plate 130 is in a horizontal state when it extends to the discharge hole 121. In the embodiments of the present application, through the above arrangement, the inclined water filtering mesh plate 130 can accelerate the falling speed of the PVDF particles, and setting the end of the water filtering mesh plate 130 in a horizontal state is beneficial to preventing excessive moisture from sliding along the edge of the water filtering mesh plate 130 to the outside.
[0024] In some embodiments, a water baffle 131 is provided at one end of the bottom side of the water filtering mesh plate 130 near the discharge hole 121. The length direction of the water baffle 131 coincides with the width direction of the water filtering mesh plate 130, and the water baffle 131 extends from one side of the water filtering mesh plate 130 to the other side. In the embodiments of the present application, by providing the water baffle 131 to block the bottom of the water filtering mesh plate 130, when the liquid water slides along the bottom of the water filtering mesh plate 130 and is blocked by the water baffle 131, it will fall along the water baffle 131 and finally converge into liquid water droplets at the lower end of the water baffle 131 and then drop into the flushing tank 120.
[0025] In some embodiments, it includes a cooling and recycling system 150. The cooling and recycling system 150 includes a circulation water tank 151. A heat exchanger 152 is arranged in the circulation water tank 151. The bottom of the flushing tank 120 is recessed downward to form a water collecting tank 127. The water collecting tank 127 is communicated with the circulation water tank 151. A water pump 153 is arranged at the circulation water tank 151, and the water pump 153 is communicated with a water supply hose 124. In the embodiments of the present application, by providing the cooling and recycling system 150, the liquid water can be cooled, and the water after cooling has a better cooling effect. Moreover, the setting of the water collecting tank 127 is convenient for collecting the water seal for recycling, thereby reducing the waste of water resources.
[0026] Finally, it should be noted that: the above embodiments 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 foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.
Claims
1. A mixing and extrusion granulator applied to PVDF, characterized in that, It includes an extruder body, at the end of the extruder body, there are multiple discharge ports, at the discharge ports, there are cutting components, and at the bottom of the extruder body, there is a flushing box; In the flushing box, a water filtering mesh plate is inclinedly arranged, the bottom of the water filtering mesh plate is connected to the bottom wall of the flushing box through multiple telescopic components, on one side of the bottom wall of the flushing box, there is a discharge hole, at the bottom of the discharge hole, there is a discharge pipe connected, and the lower end of the water filtering mesh plate extends downward to the position of the discharge hole; In the flushing box, there are multiple water-cooled flushing pipes, the tops of the multiple water-cooled flushing pipes form a water outlet end, the water outlet end extends upward to the position of the discharge port, and the bottom end of the water-cooled flushing pipe penetrates downward and extends to the bottom of the flushing box and then is connected to a water supply hose.
2. The melt extrusion granulator applied to PVDF according to claim 1, wherein On the top of the flushing box, there is an installation groove, the end of the extruder body is inserted into the installation groove, a water seal rubber ring is arranged between the inner side wall of the extruder body and the installation groove, and the installation groove and the extruder body are connected by multiple bolts.
3. The melt extrusion granulator applied to PVDF according to claim 1, characterized in that, At the bottom of the discharge pipe, there are multiple hooks symmetrically arranged, and the multiple hooks are jointly used for hanging an aggregate bag.
4. The melt extrusion granulator applied to PVDF according to claim 1, wherein The downward inclination amplitude of the lower end of the water filtering mesh plate gradually becomes smaller until the water filtering mesh plate is in a horizontal state when it extends to the position of the discharge hole.
5. The melt extrusion granulator applied to PVDF according to claim 4, wherein On one side of the bottom of the water filtering mesh plate, near one end of the discharge hole, there is a water baffle, the length direction of the water baffle coincides with the width direction of the water filtering mesh plate, and the water baffle extends from one side of the water filtering mesh plate to the other side.
6. The melt extrusion granulator applied to PVDF according to claim 5, characterized in that, It includes a cooling recycling system, the cooling recycling system includes a circulation water tank, in the circulation water tank, there is a heat exchanger, the bottom of the flushing box is recessed downward to form a water collecting tank, the water collecting tank is communicated with the circulation water tank, at the circulation water tank, there is a water pump, and the water pump is communicated with the water supply hose.