Filter element of extruding machine

Abstract

The utility model discloses an extruder filter element which is installed in a fluid channel of an extruder and used for filtering solid impurities in master batch molten fluid, the extruder is provided with an installation groove used for installing the filter element, and the installation groove is communicated with the fluid channel. The filter element comprises a base and a filter head, the base is installed in the installation groove, the filter head is fixed to the base, the filter head penetrates through the installation groove to be located in the fluid channel, and fluid flows in from the inflow end of the fluid channel and flows out from the outflow end of the fluid channel after being filtered by the filter head. According to the utility model, solid impurities in a melt can be filtered, so that the extruder is prevented from being influenced by non-molten solid impurities, and the production quality, efficiency and operation safety are improved.

Description

Technical Field

[0001] This utility model relates to solvent filtration technology for masterbatch in spinning extruders, specifically an extruder filter element. Background Technology

[0002] When a spinning extruder is working, the plastic masterbatch needs to be completely melted into a solvent before being passed through the fluid channels within the extruder and finally ejected as filaments through the spinneret. During this process, due to the open space, workers may accidentally drop non-melting metals such as small keychains or screws into the melt. These non-melting solids can, at best, disrupt production, and at worst, damage the extruder or even threaten the safety of the workers. Therefore, a filtration device installed in the spinning extruder is needed to filter out the non-melting solids from the melt. Utility Model Content

[0003] The purpose of this invention is to provide an extruder filter element that can filter solid impurities in the melt, prevent the extruder from being affected by non-meltable solid impurities, and improve production quality, efficiency, and operational safety.

[0004] To achieve the above-mentioned objectives, the present invention employs the following technical solution: an extruder filter element, installed in the fluid channel of an extruder, for filtering solid impurities in the molten masterbatch fluid. The extruder is provided with an installation groove for installing the filter element, and the installation groove is connected to the fluid channel. The filter element includes a base and a filter head. The base is installed in the installation groove, and the filter head is fixed on the base. The filter head passes through the installation groove and is located in the fluid channel. The fluid flows in from the inflow end of the fluid channel, is filtered by the filter head, and flows out from the outflow end of the fluid channel.

[0005] Compared with existing technologies, the extruder filter element adopting the above technical solution has the following beneficial effects:

[0006] I. The extruder filter element of this utility model can filter out solid impurities in the melt through the filter head in the fluid channel, thus preventing damage to the extruder.

[0007] 2. The filter head can be detachably installed on the extruder via the base and mounting slot, facilitating the overall removal and replacement of the filter element.

[0008] Preferably, the outer wall of the filter head is in close contact with the inner wall of the fluid channel, the filter head has a cavity inside, one end of the filter head is fixed to the base, the other end of the filter head has an opening that communicates with the cavity, the inflow end of the fluid channel is connected to the opening, and the fluid flows into the cavity from the opening.

[0009] Preferably, the outer wall of the filter head is provided with an annular fluid groove, and a sealed space is formed between the bottom of the fluid groove and the inner wall of the fluid channel. The bottom of the fluid groove is provided with a plurality of filter holes, which are perforated and connect the fluid groove and the cavity. The outlet end of the fluid channel is connected to the fluid groove. The fluid flows from the cavity through the filter holes into the fluid groove and finally flows out from the outlet end of the fluid channel.

[0010] After the fluid flows into the cavity through the opening, it can be filtered through the filter holes on the inner wall of the cavity. Compared to the traditional planar filter plates placed in the fluid channel, the cavity and the filter holes on the inner wall of the cavity increase the filtration area of ​​the fluid and reduce the impact of the filter head on the fluid flow rate.

[0011] Preferably, the distance between the bottom of the fluid tank and the inner wall of the fluid channel is the flow distance of the fluid, which is a non-fixed value, and the connection between the outlet end of the fluid channel and the fluid tank is the maximum value of the flow distance.

[0012] Preferably, the inner wall shape of the fluid channel and the bottom shape of the fluid tank are both circular, and the center of the circle containing the fluid channel and the center of the circle containing the fluid tank do not coincide.

[0013] The non-coincident design of the flow channels allows for both maximum and minimum flow distances between the bottom of the flow tank and the inner wall of the fluid channel. For the same volume of fluid, the flow velocity is faster in spaces with shorter flow distances. By changing the fluid velocity, the time it takes for the fluid to travel from the filter orifice to the outlet can be controlled, thereby controlling the temperature difference between the melt flowing from different positions of the filter head.

[0014] Preferably, the surface of the opening that contacts the fluid in the fluid channel is a convection surface, which is an inclined surface that facilitates the flow of the fluid from the fluid channel into the cavity.

[0015] The inclined convection surface ensures that the fluid is not blocked by the filter head when flowing into the cavity, thereby increasing the flow velocity and preventing the melt from accumulating at the end of the filter head.

[0016] Preferably, a filter screen is provided inside the cavity, and the filter screen is attached to the inner wall of the cavity. The fluid flows into the filter hole after passing through the filter screen.

[0017] The filter screen allows for more precise filtration of the melt, improving the quality of the filtration.

[0018] Preferably, the surface of the base inside the cavity is a flow-facing surface, which is positioned opposite to the inflow end of the fluid channel, and the middle of the flow-facing surface protrudes towards the opening of the filter head.

[0019] The prominently designed front surface acts as a guide, directing the fluid flowing into the cavity toward the inner wall of the cavity.

[0020] Preferably, the base is provided with an inspection hole that penetrates the base. One end of the inspection hole is connected to the outside, and the other end of the inspection hole is connected to the cavity. The inspection hole is provided with threads and a detachable first bolt is provided inside the inspection hole.

[0021] Preferably, the base is provided with fixing holes around its perimeter, the mounting groove is provided with threaded holes corresponding to the fixing holes, a second bolt is provided in the fixing holes, and the filter element is fixed in the mounting groove by the second bolt.

[0022] The inclusion of inspection and fixing holes facilitates the installation, removal, and maintenance of the filter element. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of an embodiment of the extruder filter element of this utility model.

[0024] Figure 2 This is a cross-sectional view of the filter element installed in the fluid channel of the extruder in the embodiment.

[0025] Figure 3 This is a cross-sectional view of the filter element installed in the fluid channel of the extruder in the embodiment, taken from another angle.

[0026] Reference numerals: 1. Extruder; 11. Fluid channel; 111. Inlet end; 112. Outlet end; 12. Mounting groove; 13. Threaded hole; 2. Base; 21. Inspection hole; 22. Fixing hole; 23. Flow-facing surface; 3. Filter head; 30. Cavity; 31. Opening; 311. Convection surface; 32. Fluid tank; 33. Filter hole; 4. Filter screen. Detailed Implementation

[0027] The present invention will now be further described with reference to the accompanying drawings.

[0028] like Figures 1 to 3The filter element of the extruder 1 shown is installed in the fluid channel 11 of the extruder 1 and is used to filter solid impurities in the molten masterbatch fluid.

[0029] The extruder 1 is provided with an installation groove 12 for installing a filter element. The installation groove 12 is connected to the fluid channel 11. The filter element includes a base 2 and a filter head 3. The base 2 is installed in the installation groove 12, and the filter head 3 is fixed on the base 2. The filter head 3 passes through the installation groove 12 and is located in the fluid channel 11.

[0030] like Figure 1 and Figure 2 As shown, the base 2 has fixing holes 22 around its perimeter, and the mounting groove 12 has threaded holes 13 corresponding to the fixing holes 22. A second bolt (not shown in the figure) is installed in the fixing hole 22, and the filter element is fixed in the mounting groove 12 by the second bolt. In actual production and installation, multiple fixing holes 22 and threaded holes 13 can be used to fix the base 2 and the extruder 1 according to the size of the filter element and the requirements of the sealing strength, so as to achieve a better fixing effect.

[0031] In this embodiment, the base 2 is provided with an inspection hole 21, which penetrates the base 2. One end of the inspection hole 21 is connected to the outside, and the other end of the inspection hole 21 is connected to the cavity 30. The inspection hole 21 is provided with threads, and a detachable first bolt (not shown in the figure) is provided in the inspection hole 21. The first bolt and the inspection hole 21 are sealed together to ensure that the fluid in the cavity 30 will not flow out from the inspection hole 21.

[0032] In this embodiment, the filter head 3 has a circular cross-section, and the fluid channel 11 also has a circular cross-section. The outer wall of the filter head 3 inside the extruder 1 is tightly fitted with the inner wall of the fluid channel 11. The filter head 3 has a cavity 30 inside. One end of the filter head 3 is fixed to the base 2, and the other end of the filter head 3 has an opening 31 that connects to the cavity 30. The inflow end 111 of the fluid channel 11 is connected to the opening 31. The outer wall of the filter head 3 has an annular fluid groove 32. The bottom of the fluid groove 32 forms a sealed space with the inner wall of the fluid channel 11. The bottom of the fluid groove 32 has several filter holes 33. The filter holes 33 are perforated and connect the fluid groove 32 and the cavity 30. The outflow end 112 of the fluid channel 11 is connected to the fluid groove 32.

[0033] In addition, to enhance the filtration effect, a filter screen 4 is provided inside the cavity 30. The filter screen 4 is attached to the inner wall of the cavity 30, and the fluid flows into the filter hole 33 after passing through the filter screen 4.

[0034] Combination Figure 2As indicated by the arrow, fluid flows into the cavity 30 from the opening 31, passes through the filter screen 4 and filter holes 33 on the inner wall of the cavity 30, and then flows into the fluid tank 32, finally exiting from the outlet 112 of the fluid channel 11. The surface in contact between the opening 31 and the fluid in the fluid channel 11 is the convection surface 311, which is an inclined surface designed to facilitate the flow of fluid from the fluid channel 11 into the cavity 30. The inclined convection surface 311 ensures that the fluid is not obstructed by the filter head 3 when flowing into the cavity 30, increasing the flow velocity while preventing the accumulation of melt at the end of the filter head 3.

[0035] Furthermore, the surface of the base 2 within the cavity 30 is the flow-facing surface 23, which is positioned opposite to the inflow end 111 of the fluid channel 11. The center of the flow-facing surface 23 protrudes towards the opening 31 of the filter head 3. More specifically, the flow-facing surface 23 is an arc-shaped surface, with its center point being the most prominent point. This protruding flow-facing surface 23 serves to guide the fluid flowing into the cavity 30 towards the inner wall of the cavity 30.

[0036] In this embodiment, the fluid channel 11 formed by the inflow end 111 and the outflow end 112 is a right-angled channel, and the mounting groove 12 is located at a right angle. When the spinning extruder 1 is operating, it is necessary to maintain the fluid within the fluid channel 11 within a certain temperature range. For example... Figure 2 As shown, when the flow distance of the fluid tank 32 is the same, the temperature of the solution falling from above to the outlet 112 will be higher than the temperature of the solution flowing directly from the filter hole 33 at the bottom of the filter head 3, resulting in a large temperature difference when the solutions merge. Therefore, in order to ensure that the temperature of the solution flowing through the outlet 112 after filtration remains basically consistent, it is necessary to control the flow rate of the solution by changing the flow distance.

[0037] Therefore, the distance between the bottom of the fluid tank 32 and the inner wall of the fluid channel 11 is the fluid flow distance, which is a non-fixed value. The connection between the outlet end 112 of the fluid channel 11 and the fluid tank 32 is the location of the maximum flow distance. In this embodiment, as... Figure 3 As shown, the bottom of the fluid tank 32 is circular. The center of the circle where the fluid channel 11 is located does not coincide with the center of the circle where the fluid tank 32 is located, and the center of the filter head 3 is slightly higher.

[0038] The non-coincident design of the fluid centers creates a maximum and minimum flow distance between the bottom of the fluid tank 32 and the inner wall of the fluid channel 11. For the same volume of fluid, the flow speed is faster in a space with a shorter flow distance. The faster flow rate means the time it takes for the fluid to flow from the filter hole 33 into the outlet end 112 is shorter, resulting in slower heat dissipation. This effectively reduces the temperature difference between the molten fluid flowing from the upper and lower parts of the filter head 3.

[0039] The above are preferred embodiments of this utility model. For those skilled in the art, several modifications and improvements can be made without departing from the principle of this utility model, and these should also be considered within the protection scope of this utility model.

Claims

1. An extruder filter element, installed in the fluid channel (11) of an extruder (1), for filtering solid impurities in the molten masterbatch fluid, characterized in that: The extruder (1) is provided with an installation groove (12) for installing a filter element. The installation groove (12) is connected to the fluid channel (11). The filter element includes a base (2) and a filter head (3). The base (2) is installed in the installation groove (12). The filter head (3) is fixed on the base (2). The filter head (3) passes through the installation groove (12) and is located in the fluid channel (11). The fluid flows in from the inflow end (111) of the fluid channel (11) and flows out from the outflow end (112) of the fluid channel (11) after being filtered by the filter head (3).

2. The extruder filter element according to claim 1, characterized in that: The outer wall of the filter head (3) is tightly fitted to the inner wall of the fluid channel (11). The filter head (3) has a cavity (30) inside. One end of the filter head (3) is fixed on the base (2). The other end of the filter head (3) has an opening (31) that connects to the cavity (30). The inflow end (111) of the fluid channel (11) is connected to the opening (31). The fluid flows into the cavity (30) from the opening (31).

3. The extruder filter element according to claim 2, characterized in that: The outer wall of the filter head (3) is provided with an annular fluid groove (32). The bottom of the fluid groove (32) and the inner wall of the fluid channel (11) form a sealed space. The bottom of the fluid groove (32) is provided with a plurality of filter holes (33). The filter holes (33) are perforated. The filter holes (33) connect the fluid groove (32) and the cavity (30). The outlet end (112) of the fluid channel (11) is connected to the fluid groove (32). The fluid flows from the cavity (30) through the filter holes (33) into the fluid groove (32) and finally flows out from the outlet end (112) of the fluid channel (11).

4. The extruder filter element according to claim 3, characterized in that: The distance between the bottom of the fluid tank (32) and the inner wall of the fluid channel (11) is the flow distance of the fluid. The flow distance is a non-fixed value. The connection between the outlet end (112) of the fluid channel (11) and the fluid tank (32) is the maximum value of the flow distance.

5. The extruder filter element according to claim 4, characterized in that: The inner wall shape of the fluid channel (11) and the bottom shape of the fluid tank (32) are both circular. The center of the circle containing the fluid channel (11) and the center of the circle containing the fluid tank (32) do not coincide.

6. The extruder filter element according to claim 4 or 5, characterized in that: The surface of the opening (31) that contacts the fluid in the fluid channel (11) is the convection surface (311), which is an inclined surface that facilitates the flow of the fluid from the fluid channel (11) into the cavity (30).

7. The extruder filter element according to claim 6, characterized in that: The cavity (30) is provided with a filter screen (4), which is attached to the inner wall of the cavity (30). The fluid flows through the filter screen (4) and then into the filter hole (33).

8. The extruder filter element according to claim 6, characterized in that: The base (2) inside the cavity (30) has a flow-facing surface (23), which is opposite to the inflow end (111) of the fluid channel (11). The middle of the flow-facing surface (23) protrudes towards the opening (31) of the filter head (3).

9. The extruder filter element according to claim 7, characterized in that: The base (2) is provided with an inspection hole (21), which penetrates the base (2). One end of the inspection hole (21) is connected to the outside, and the other end of the inspection hole (21) is connected to the cavity (30). The inspection hole (21) is provided with a thread, and a first bolt that can be detached is provided in the inspection hole (21).

10. The extruder filter element according to claim 3, characterized in that: The base (2) is provided with fixing holes (22) around its perimeter. The mounting groove (12) is provided with threaded holes (13) corresponding to the fixing holes (22). A second bolt is provided in the fixing holes (22). The filter element is fixed in the mounting groove (12) by the second bolt.

Images