Filter for wire drawing machine and wire drawing machine

Abstract

The utility model discloses a filter for a wire drawing machine, which belongs to the field of plastic processing machinery, solves the problem of low working efficiency caused by high filter screen replacement frequency, and adopts the technical scheme that at least two screen replacement cavities are arranged, all the screen replacement cavities are communicated by a melt feeding runner, and filter screen cylinders are inserted into the screen replacement cavities one by one; a circulation gap is formed between the periphery of the filter screen cylinder and the inner wall of the screen changing cavity, the box body is provided with an installing hole communicated with one end of the screen changing cavity, the installing hole is used for installing the filter screen cylinder, the other end of the screen changing cavity is provided with a connecting through hole communicated with the melt discharging runner, one end of the filter screen cylinder is fixed to the box body, and the other end of the filter screen cylinder is open and is in butt joint with the connecting through hole. The filter is mainly used for prolonging the service life of the filter, reducing the replacement frequency of the filter screen, ensuring the working efficiency of the wire drawing machine and improving the use experience of a user. The utility model further discloses the wire drawing machine which adopts the filter for the wire drawing machine.

Description

Technical Field

[0001] This utility model relates to the field of plastic processing machinery, and in particular to a filter for a wire drawing machine and a wire drawing machine. Background Technology

[0002] In the plastic weaving industry, recycled plastics are commonly used to produce recycled materials to reduce production costs. These materials contain many impurities and therefore need to be filtered before being fed into the die for forming. Existing wire drawing machines use disc-shaped filters to initially filter the molten plastic extruded from the extruder, such as the plastic filter disclosed in existing technology CN210940386U. To ensure filtration efficiency, these filters are over one meter in diameter, large in size, and weigh around one ton. Each filter replacement requires a crane for lifting, which is inconvenient and prone to falling accidents, posing a safety risk. Furthermore, because the filter area is limited, it becomes clogged after a short period, requiring frequent replacement. Since machine shutdown is necessary for filter replacement, it affects the efficiency of the wire drawing machine and creates a poor user experience. Utility Model Content

[0003] The purpose of this invention is to provide a filter for wire drawing machines, which solves the problem of low working efficiency caused by high filter replacement frequency, extends the service life of the filter, reduces the filter replacement frequency, ensures the working efficiency of the wire drawing machine, and improves the user experience.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a filter for a wire drawing machine, comprising a housing and a filter cylinder. The housing is provided with a melt feed channel, a melt discharge channel, and a screen changing chamber. The inlet of the melt feed channel is connected to the discharge screw of the extruder. At least two screen changing chambers are provided. The melt feed channel connects all screen changing chambers. The filter cylinder is inserted into the screen changing chamber one by one. There is a flow gap between the outer periphery of the filter cylinder and the inner wall of the screen changing chamber. The housing is provided with an installation hole connected to one end of the screen changing chamber for installing the filter cylinder. The other end of the screen changing chamber is provided with a connecting through hole connected to the melt discharge channel. One end of the filter cylinder is fixed to the housing, and the other end is open and connected to the connecting through hole. The melt flows sequentially through the melt feed channel, the screen changing chamber, the filter cylinder, the connecting through hole, and the melt discharge channel.

[0005] After adopting the above technical solution, this utility model has the following advantages: Multiple screen changing chambers are set up. Since the melt feed channel connects all screen changing chambers, multiple filter cylinders can filter simultaneously, multiplying the filtration area. Debris is less likely to clog all filter cylinders, extending the filter's service life, reducing the frequency of filter cylinder replacement, decreasing the number of times the wire drawing machine stops, and ensuring the working efficiency of the wire drawing machine. Furthermore, each filter cylinder is lightweight, generally only about 20 kilograms, allowing one worker to easily operate and replace it, reducing the labor intensity of filter replacement and minimizing the risk of safety accidents. The filter cylinder occupies a small volume, and the number of filter cylinders can be increased as needed to improve filtration efficiency.

[0006] Furthermore, the filter cylinder includes a cylinder support and a filter screen. The filter screen is sleeved on the outer periphery of the cylinder support. The outer end of the cylinder support is fixedly connected to the housing. The inner end of the cylinder support is positioned at the other end of the screen changing cavity and is located on the outer periphery of the connecting through hole. The inner hole of the cylinder support communicates with the connecting through hole.

[0007] Using the aforementioned technical solution, the filter screen is fitted around the outer periphery of the cylinder support, which facilitates the reuse of the cylinder support after cleaning. At the same time, the cylinder support is used to support the filter screen, preventing the filter screen from deforming under the pressure of the melt and affecting the filtration effect. The structural strength of the cylinder support can also improve the stability of the filter screen cylinder after installation, ensuring that the melt can be fully filtered and preventing leakage or unfiltered material.

[0008] Furthermore, the outer end of the cylinder support is provided with a connecting flange, which is fixedly connected to the box body to fix the filter cylinder and close the mounting hole.

[0009] By adopting the aforementioned technical solution, the connecting flange is easy to install and fix, and ensures reliable strength after installation. It can also increase the contact area with the housing, improve the sealing performance, and prevent the molten material from overflowing from the mounting hole.

[0010] Furthermore, the cylindrical support is integrally formed or welded to the connecting flange; and / or, the connecting flange has a mating stop on the side facing the box, and the mating stop is inserted into the mounting hole for mating.

[0011] The aforementioned technical solution ensures the reliability of the connection between the cylinder support and the connecting flange, which is beneficial for long-term repeated use. By using a stop, the positioning accuracy of the connecting flange during installation is increased, which facilitates bolt installation and can also support and position the outer end of the cylinder support.

[0012] Furthermore, the other end of the screen changing chamber is provided with a positioning groove, the inner end of the cylinder support is inserted into the positioning groove to cooperate, the connecting through hole is provided on the bottom surface of the positioning groove, and the opening at the other end of the filter screen cylinder covers the connecting through hole.

[0013] By adopting the aforementioned technical solution, the positioning reliability of the cylinder support is further improved, and it is further ensured that the melt is filtered through the filter screen before flowing into the cylinder support.

[0014] Furthermore, the housing includes a base and a discharge plate. The melt feed channel and the screen changing chamber are located on the base, the connecting through hole and the melt discharge channel are located on the discharge plate, the screen changing chamber is arranged laterally, and the discharge plate is detachably fixed to one side of the base.

[0015] Using the aforementioned technical solution, the discharge plate is detachable from the substrate, which facilitates inspection and maintenance. The screen changing chamber is set horizontally, which helps the melt to disperse and flow to the outer periphery of the filter screen after entering the screen changing chamber, so that the filter screen is evenly stressed, improves the utilization rate of the filter screen, and helps to ensure filtration efficiency.

[0016] Furthermore, the substrate is provided with a heater to keep the melt in the melt feed channel in a molten state and a temperature sensor to monitor the heating temperature.

[0017] Using the aforementioned technical solution, the heater can ensure that the melt remains in a molten state and has sufficient fluidity, keeping the melt pressure in the melt feed channel at an appropriate level. The temperature sensor can assist in adjusting the heater's operating temperature to prevent the heater temperature from being too low or too high.

[0018] Furthermore, all screen changing cavities are arranged axially parallel, and the melt feed channel is connected to the middle of the screen changing cavity.

[0019] Using the aforementioned technical solution, all filter cylinders are disassembled in the same direction, which is convenient for workers to replace. The melt feed channel is connected to the middle of the screen changing chamber, allowing the melt to be quickly dispersed to the outer periphery of the entire filter cylinder after entering the screen changing chamber, reducing the influence of gravity on the melt flow. The pressure of the melt is adjusted by using the extrusion speed of the extruder, which improves controllability, promotes melt filtration, and improves filtration efficiency.

[0020] This utility model also provides a wire drawing machine, including an extruder and a filter. The filter adopts the wire drawing machine filter described in any of the above technical solutions, and the inlet of the melt feed channel is connected to the extruder discharge screw.

[0021] By adopting the aforementioned technical solution, multiple filter cylinders can filter simultaneously, which multiplies the filtration area. Debris is less likely to clog all filter cylinders, which can extend the service life of the filter, reduce the frequency of filter cylinder replacement, reduce the number of times the wire drawing machine is shut down, and ensure the working efficiency of the wire drawing machine.

[0022] Furthermore, a belt screen changer is connected downstream of the melt discharge channel, and a die head is connected downstream of the belt screen changer.

[0023] By adopting the aforementioned technical solution, after coarse filtration using a filter cylinder, fine filtration is then performed using a belt screen changer, which can improve the filtration quality. At the same time, after the filter cylinder filters out large particulate impurities, it can extend the service life of the belt screen changer and reduce the frequency of screen replacement. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of a filter for a wire drawing machine according to the present invention;

[0026] Figure 2 for Figure 1 A schematic diagram of the cross-section at point AA;

[0027] Figure 3 This is a cross-sectional view (a) of a filter for a wire drawing machine according to the present invention;

[0028] Figure 4 for Figure 3 A schematic diagram of the cross-section at point BB;

[0029] Figure 5 for Figure 3 A schematic diagram of the cross-section at point CC;

[0030] Figure 6 This is a cross-sectional view (II) of a filter for a wire drawing machine according to the present invention;

[0031] Figure 7 This is a partial schematic diagram (upstream of the die head) of a wire drawing machine according to this utility model.

[0032] Figure 8 for Figure 7 The main view. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0034] The terms "first," "second," etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects, not to describe a specific order or sequence. Even if "second" is used before a technical feature for distinction, it does not necessarily imply the presence of "first." It should be understood that in this utility model, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, and Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Containing X, Y, and Z," "Containing X, Y, and Z" means that all three X, Y, and Z are included; "Containing X, Y, or Z" means that one of X, Y, and Z is included; "Containing X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are included.

[0035] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0036] Example 1:

[0037] like Figures 1 to 5 As shown, this utility model provides a filter for a wire drawing machine, including a housing 100 and filter cylinders 200. The housing 100 is provided with a melt feed channel 101, a melt discharge channel 102, and a screen changing chamber 103. The inlet of the melt feed channel 101 is connected to the discharge screw of the extruder. There are four screen changing chambers 103, and the melt feed channel 101 connects all the screen changing chambers 103. The filter cylinders 200 are inserted into the screen changing chambers 103 one by one, and there is a flow channel between the outer periphery of the filter cylinder 200 and the inner wall of the screen changing chamber 103. The gap is 104. The housing 100 has a mounting hole 105 that communicates with one end of the screen changing chamber 103. The mounting hole 105 is for installing the filter cylinder 200. The other end of the screen changing chamber 103 has a connecting through hole 106 that communicates with the melt discharge channel 102. One end of the filter cylinder 200 is fixed to the housing 100, and the other end is open and connected to the connecting through hole 106. The melt flows sequentially through the melt feed channel 101, the screen changing chamber 103, the filter cylinder 200, the connecting through hole 106, and the melt discharge channel 102. (Refer to...) Figure 2 As indicated by the arrow in the diagram. The number of screen changing chambers 103 can be adjusted according to actual needs, and can be designed from 2 to 8. In some large wire drawing machines, the number of screen changing chambers 103 can be increased.

[0038] This invention features multiple screen changing chambers 103. Since the melt feed channel 101 connects all screen changing chambers 103, multiple filter cylinders 200 can filter simultaneously, significantly increasing the filtration area. Debris is less likely to clog all filter cylinders 200, extending the filter's service life, reducing the frequency of filter cylinder replacement, minimizing downtime of the wire drawing machine, and ensuring its working efficiency. Furthermore, each filter cylinder 200 is lightweight, typically only about 20 kilograms, allowing for easy operation and replacement by a single worker. This reduces the labor intensity of filter replacement and minimizes the risk of accidents. The filter cylinders 200 also occupy a small volume, allowing for increased filtration efficiency by adding more cylinders as needed.

[0039] In one embodiment, the filter cylinder 200 includes a cylinder support 21 and a filter screen 22. The filter screen 22 is fitted around the outer periphery of the cylinder support 21. The outer end of the cylinder support 21 is fixedly connected to the housing 100, and the inner end of the cylinder support 21 is positioned at the other end of the screen changing chamber 103 and located around the connecting through hole 106. The inner hole 210 of the cylinder support 21 communicates with the connecting through hole 106. The filter screen 22 fitting around the outer periphery of the cylinder support 21 facilitates the reuse of the cylinder support 21 after cleaning. Simultaneously, the cylinder support 21 supports the filter screen 22, preventing deformation of the filter screen 22 under melt pressure and thus avoiding filtration. The structural strength of the cylinder support 21 also improves the stability of the filter cylinder 200 after installation, ensuring that the melt is fully filtered and preventing leakage. To ensure filtration efficiency, at least 300 small holes 213 can be provided on the cylinder support 21, and the small holes 213 communicate with the inner hole 210 of the cylinder support 21. To ensure filtration efficiency, the outer circumferential area of ​​a single filter screen 22 shall not be less than 0.5㎡. The filter screen 22 may be fitted with only one layer around the outer circumference of the cylindrical support 21, or multiple layers may be fitted as needed to improve the filtration effect.

[0040] In one embodiment, the outer end of the cylinder support 21 is provided with a connecting flange 211. The connecting flange 211 is fixedly connected to the housing 100 to fix the filter cylinder 200 and close the mounting hole 105. The connecting flange 211 facilitates installation and fixation, ensures reliable strength after installation, and also increases the contact area with the housing 100, improving sealing and preventing molten material from overflowing from the mounting hole 105. The connecting flange 211 can be fixedly connected to the housing 100 by bolts 212.

[0041] The cylinder support 21 and the connecting flange 211 are integrally formed, or they can be fixed by welding or other common connection methods. Ensuring the reliable connection between the cylinder support 21 and the connecting flange 211 is beneficial for long-term repeated use. The cylinder support 21 can be replaced individually via the connecting flange 211, or multiple filter cylinders 200 can be replaced simultaneously via a single connecting flange 211, meaning multiple filter cylinders 200 are fixed together with one connecting flange 211.

[0042] refer to Figure 6 In one embodiment, the connecting flange 211 has a mating stop 214 on the side facing the housing 100. The mating stop 214 is inserted into the mounting hole 105 to engage. The mating stop 214 increases the positioning accuracy of the connecting flange 211 during installation, facilitates the installation of bolts 212, improves assembly efficiency, and supports the outer end of the positioning cylinder bracket 21, thereby improving the stability of the filter cylinder 200 during operation.

[0043] To improve the stability of the filter cylinder 200 within the screen changing chamber 103, a positioning groove 107 can be provided at the other end of the screen changing chamber 103. The inner end of the cylinder support 21 is inserted into the positioning groove 107 for engagement. A connecting through hole 106 is located on the bottom surface of the positioning groove 107, and the opening at the other end of the filter cylinder 200 covers the connecting through hole 106. This further improves the positioning reliability of the cylinder support 21 and further ensures that the melt is filtered by the filter screen 22 before flowing into the cylinder support 21.

[0044] The housing 100 includes a base 11 and a discharge plate 12. A melt feed channel 101 and a screen changing chamber 103 are disposed on the base 11, and a connecting through hole 106 and a melt discharge channel 102 are disposed on the discharge plate 12. The screen changing chamber 103 is arranged laterally, and the discharge plate 12 is detachably fixed to one side of the base 11. The discharge plate 12 is detachable from the base 11, which facilitates inspection and maintenance. The laterally arranged screen changing chamber 103 is conducive to the dispersion and flow of melt into the outer peripheral side of the filter screen 22 after entering the screen changing chamber 103, so that the filter screen 22 is evenly stressed, improving the utilization rate of the filter screen 22 and ensuring filtration efficiency.

[0045] refer to Figure 6 The substrate 11 is equipped with a heater 111 to keep the melt in the melt feed channel 101 in a molten state and a temperature sensor 112 to monitor the heating temperature. The heater 111 ensures that the melt remains in a molten state and has sufficient fluidity, keeping the melt pressure in the melt feed channel 101 at an appropriate level. The temperature sensor 112 helps to regulate the operating temperature of the heater, preventing the heater 111 from being too low or too high. The heater 111 can be an electric heating element.

[0046] All screen changing chambers 103 are arranged axially parallel, with the melt feed channel 101 connected to the middle of each chamber. All filter cylinders 200 are disassembled in the same direction for easy replacement by workers. The melt feed channel 101, connected to the middle of each chamber, allows the melt to be quickly dispersed to the outer periphery of the entire filter cylinder 200 after entering the chamber, reducing the influence of gravity on melt flow. The pressure of the melt is adjusted using the extrusion speed of the extruder, improving controllability and promoting melt filtration, thus increasing filtration efficiency. To make replacing the filter cylinder 200 easier for workers, lugs or handles can be installed on the outside of the connecting flange 211, allowing the filter cylinder 200 to be pulled out laterally using a hydraulic press or motor.

[0047] Example 2:

[0048] refer to Figure 7 and Figure 8 This utility model also provides a wire drawing machine, including an extruder and a filter. The filter adopts the wire drawing machine filter described in any of the above embodiments. The inlet of the melt feed channel 101 is connected to the discharge screw 300 of the extruder. Multiple filter cylinders 200 can filter simultaneously, which multiplies the filtration area. Debris is less likely to clog all filter cylinders 200, which can extend the service life of the filter, reduce the replacement frequency of the filter cylinders 200, reduce the number of downtimes of the wire drawing machine, and ensure the working efficiency of the wire drawing machine.

[0049] In one embodiment, a belt screen changer 400 is connected downstream of the melt discharge channel 102, and a die head 600 is connected downstream of the belt screen changer 400. After coarse filtration using the filter cylinder 200, fine filtration is performed using the belt screen changer 400, which improves the filtration quality. Simultaneously, by filtering out large particulate impurities, the filter cylinder 200 extends the service life of the belt screen changer 400 and reduces its screen-changing frequency. The belt screen changer 400 can be based on existing technology and will not be described in detail here.

[0050] To achieve automatic adjustment of melt pressure, a metering pump 500 can be connected downstream of the belt screen changer 400 and then connected to the die head 600. At the same time, a pressure sensor 301 is installed on the discharge screw of the extruder. If the melt pressure rises, it can be detected by the pressure sensor 301 and the metering pump 500, and the extrusion speed of the extruder can be reduced, thereby reducing the melt pressure. Conversely, the extrusion speed of the extruder can be increased, thereby increasing the melt pressure, thus achieving dynamic balance of melt pressure.

[0051] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. A filter for a wire drawing machine, comprising a housing and a filter screen cylinder, the housing having a melt feed channel, a melt discharge channel, and a screen changing chamber, the inlet of the melt feed channel being connected to the discharge screw of an extruder, characterized in that, The screen changing chamber is provided with at least two, and the melt feed channel connects all the screen changing chambers. The filter cylinders are inserted into the screen changing chambers one by one. There is a flow gap between the outer periphery of the filter cylinder and the inner wall of the screen changing chamber. The box body is provided with an installation hole that communicates with one end of the screen changing chamber for the installation of the filter cylinder. The other end of the screen changing chamber is provided with a connecting through hole that communicates with the melt discharge channel. One end of the filter cylinder is fixed to the box body, and the other end is open and connected to the connecting through hole. The melt flows sequentially through the melt feed channel, screen changing chamber, filter cylinder, connecting through hole, and melt discharge channel.

2. The filter for a wire drawing machine according to claim 1, characterized in that, The filter cylinder includes a cylinder support and a filter screen. The filter screen is sleeved on the outer periphery of the cylinder support. The outer end of the cylinder support is fixedly connected to the housing. The inner end of the cylinder support is positioned at the other end of the screen changing chamber and is located on the outer periphery of the connecting through hole. The inner hole of the cylinder support communicates with the connecting through hole.

3. The filter for a wire drawing machine according to claim 2, characterized in that, The outer end of the cylinder support is provided with a connecting flange, which is fixedly connected to the box body to fix the filter cylinder and close the mounting hole.

4. The filter for a wire drawing machine according to claim 3, characterized in that, The cylindrical support is integrally formed or welded to the connecting flange; and / or, the side of the connecting flange facing the box body is provided with a mating stop, which is inserted into the mounting hole for mating.

5. The filter for a wire drawing machine according to claim 2, characterized in that, The other end of the screen changing chamber is provided with a positioning groove, the inner end of the cylinder support is inserted into the positioning groove to cooperate, the connecting through hole is provided on the bottom surface of the positioning groove, and the opening at the other end of the filter cylinder covers the connecting through hole.

6. The filter for a wire drawing machine according to claim 1, characterized in that, The housing includes a base and a discharge plate. The melt feed channel and the screen changing chamber are located on the base, and the connecting through hole and the melt discharge channel are located on the discharge plate. The screen changing chamber is arranged horizontally, and the discharge plate is detachably fixed to one side of the base.

7. The filter for a wire drawing machine according to claim 6, characterized in that, The substrate is equipped with a heater to keep the melt in the melt feed channel in a molten state and a temperature sensor to monitor the heating temperature.

8. The filter for a wire drawing machine according to claim 1, characterized in that, All screen changing chambers are arranged axially parallel, and the melt feed channel is connected to the middle of the screen changing chamber.

9. A wire drawing machine, comprising an extruder and a filter, characterized in that, The filter is a wire drawing machine filter as described in any one of claims 1 to 8, and the inlet of the melt feed channel is connected to the discharge screw of the extruder.

10. The wire drawing machine according to claim 9, characterized in that, A belt screen changer is connected downstream of the melt discharge channel, and a die head is connected downstream of the belt screen changer.

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