Melt extrusion equipment for PFA monofilament production and preparation

Abstract

The utility model discloses melt extrusion equipment for PFA monofilament production and preparation, which comprises a rack, an extruder body, a water cooling component and a telescopic driving mechanism, the extruder body comprises a feeding inlet arranged at the upper part of the extruder body and a discharging hole of a mold arranged at the end part of the extruder body; the water cooling assembly comprises a first cooling box and a second cooling box, and the first cooling box comprises a fixed barrel and a movable barrel; the fixed cylinder body is fixedly mounted on the rack, a water cooling chamber with a sealing structure is arranged in the fixed cylinder body, a feed port communicated with the water cooling chamber is formed outside the fixed cylinder body, the feed port is communicated with a discharge port of the extruder body, and the water cooling chamber is communicated with the discharge port of the extruder body. And a first water-cooling medium inlet and a first water-cooling medium outlet which are communicated with the water-cooling cavity are also formed in the outer wall of the fixed barrel. The PFA monofilament cooling device can improve the cooling efficiency and meet the cooling requirements of different specifications of PFA monofilaments.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of PFA monofilament production preparation uses melt extrusion equipment, belong to extrusion equipment technical field. BACKGROUND

[0002] At present, PFA monofilament is widely used in high-end filter material, cable and textile field due to its excellent high-temperature resistance, chemical corrosion resistance and good insulation performance. PFA monofilament after extrusion needs to be cooled quickly to maintain dimensional stability and performance consistency. The efficiency and uniformity of the cooling process directly affect the finished product quality and physical properties of PFA monofilament.

[0003] After searching the prior art, it is found that the patent with publication number CN215481445U discloses a kind of monofilament preparation uses extruder, and the patent uses fan to input the air supply box through air supply pipe with external cold air, and the monofilament in the box is blown and cooled. However, it is found in actual use that the blowing and cooling method is limited by the uniformity of air volume and air speed, and it is difficult to achieve all-round cooling of the monofilament, which can easily lead to poor cooling effect and is difficult to fully meet the efficient production requirements. SUMMARY

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art, and to provide a kind of PFA monofilament production preparation uses melt extrusion equipment, which can improve cooling efficiency and adapt to the cooling needs of PFA monofilament of different specifications.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows: a kind of PFA monofilament production preparation uses melt extrusion equipment, comprising:

[0006] A rack;

[0007] An extruder body, the extruder body includes a feeding inlet arranged at the upper part thereof, and a die outlet arranged at the end of the extruder body;

[0008] A water cooling assembly, the water cooling assembly includes a first cooling box and a second cooling box, wherein the first cooling box includes a fixed cylinder and a movable cylinder;

[0009] The fixed cylinder is fixedly installed on the rack, a water cooling chamber with sealing structure is arranged in the fixed cylinder, a feeding port communicating with the water cooling chamber is arranged outside the fixed cylinder, the feeding port communicates with the die outlet of the extruder body, and a first water cooling medium inlet and a first water cooling medium outlet communicating with the water cooling chamber are further arranged on the outer wall of the fixed cylinder.

[0010] The movable cylinder is sealed and slides on the inside of the fixed cylinder, the movable cylinder is provided with a center passage penetrating along the length direction, the center passage is in the same straight line with the feed inlet of the fixed cylinder and the center passage is communicated with the water cooling chamber of the fixed cylinder, the movable cylinder is provided with a movable cylinder feed inlet and a movable cylinder discharge outlet communicated with the center passage;

[0011] The second cooling box is provided with a second water cooling passage, a second water cooling medium inlet and a second water cooling medium outlet communicated with the second water cooling passage, the second cooling box is provided with a feed inlet and a discharge outlet communicated with the second water cooling passage, the second water cooling medium inlet is located on the outer wall of the second cooling box close to the feed inlet, and the second water cooling medium outlet is located on the outer wall of the second cooling box close to the discharge outlet;

[0012] The telescopic driving mechanism is fixedly installed on the rack, and the telescopic driving mechanism is provided with a sliding connection seat;

[0013] The second cooling box is fixedly connected with the sliding connection seat away from one side of the first cooling box, and the feed inlet of the second cooling box is communicated with the discharge end of the first cooling box through the through hole in the sliding connection seat.

[0014] The movable cylinder is fixedly connected to the sliding connection seat, the telescopic driving mechanism is suitable for driving the movable cylinder to move relative to the fixed cylinder through the sliding connection seat, so as to adjust the cooling time and the cooling path length of the PFA monofilament in the first cooling box.

[0015] Further, the outer periphery of one end of the movable cylinder close to the feed end of the fixed cylinder is provided with an annular boss, the annular boss is in sliding sealing cooperation with the inner wall of the fixed cylinder, and a first sealing ring is arranged between the annular boss and the inner wall of the fixed cylinder.

[0016] The discharge end of the fixed cylinder extends inward to form an annular flange, the annular flange is in sliding sealing cooperation with the outer wall of the movable cylinder, and a second sealing ring is arranged between the annular flange and the outer wall of the movable cylinder.

[0017] Further, in order to facilitate conveying, the PFA monofilament production and preparation melt extrusion equipment further comprises at least one pair of conveying rollers, the conveying rollers are rotatably arranged in the center passage of the movable cylinder along the axial direction of the center passage.

[0018] Further, the bottom of the second cooling box is fixedly provided with at least one guide rail extending along the length direction of the second water cooling channel, and the rack is fixedly installed with a sliding block in sliding fit with the guide rail.

[0019] Further, a specific structure of the telescopic driving mechanism is provided, and the telescopic driving mechanism comprises:

[0020] at least one driving source fixedly installed on the rack, a driving wheel fixedly arranged on the output shaft of the driving source;

[0021] at least one screw rod rotationally installed on the rack, a driven wheel coaxially fixedly arranged at one end of the screw rod;

[0022] at least one transmission belt sleeved on the driving wheel and the driven wheel;

[0023] at least one linear guide rail fixedly installed on the rack;

[0024] a sliding block assembly slidably arranged at the bottom of the sliding connection seat and in sliding fit with the linear guide rail;

[0025] a connecting bracket fixedly arranged on the sliding connection seat and provided with a nut seat in threaded fit with the screw rod;

[0026] wherein the driving source is adapted to drive the screw rod to rotate through the transmission belt, so as to drive the sliding connection seat to reciprocatingly move along the linear guide rail.

[0027] Further, a specific type of the driving source is provided, and the driving source is an electric motor.

[0028] Further, the melt extrusion equipment for PFA monofilament production and preparation further comprises a temperature control assembly, and the temperature control assembly comprises:

[0029] temperature sensors arranged in the fixed cylinder of the first cooling box and the second water cooling channel of the second cooling box respectively, and adapted to detect the temperature in the fixed cylinder of the first cooling box and the second cooling box and send a temperature signal;

[0030] a signal display fixedly installed on the rack, electrically connected with the temperature sensors, and adapted to receive the temperature signal of the temperature sensors and display a corresponding temperature value.

[0031] By adopting the above technical scheme, the utility model has the following beneficial effects:

[0032] The utility model discloses a melt extrusion equipment for PFA monofilament production preparation, which belongs to the technical field of melt extrusion equipment.

[0033] Secondly, through the sliding sealing cooperation of the annular boss outside the movable cylinder and the first sealing ring and the sliding sealing cooperation of the annular flange at the discharge end of the fixed cylinder and the second sealing ring, the leakage of the cooling medium during operation is prevented, thereby improving the reliability of the equipment operation; at the same time, the conveying roller arranged in the central passage of the movable cylinder can effectively guide and stabilize the conveying of the extruded PFA monofilament, thereby improving the uniformity of cooling and the quality of finished products. In addition, the temperature control assembly can monitor the temperature change in the cooling box in real time through the temperature sensor and transmit the temperature signal to the signal display, so that the operator can monitor the cooling process in real time and adjust the parameters, thereby improving the operation convenience and cooling accuracy.

[0034] In summary, the melt extrusion equipment for PFA monofilament production preparation can flexibly adjust the cooling path and cooling time according to the specifications of PFA monofilament, improve the cooling efficiency and applicability, significantly improve the operation reliability, cooling effect and operation convenience of the equipment, and has high practical value and promotion prospect. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a perspective structural schematic view of the melt extrusion equipment for PFA monofilament production preparation of the utility model.

[0036] Figure 2 It is a front view of the melt extrusion equipment for PFA monofilament production preparation of the utility model.

[0037] Figure 3 It is a cross-sectional view of the first cooling box of the melt extrusion equipment for PFA monofilament production preparation of the utility model. DETAILED DESCRIPTION

[0038] In order to make the content of the utility model more easily be clearly understood, the following according to specific embodiment and combining with the drawings, the utility model is further detailed.

[0039] As Figures 1-3 The utility model discloses a kind of PFA monofilament production preparation melt extrusion equipment, comprising:

[0040] Frame 1;

[0041] Extruder body 2, extruder body 2 including setting on its upper portion, and the die outlet of setting at the end of extruder body 2 is discharged from the inlet of material;

[0042] Water cooling assembly, water cooling assembly includes first cooling box and second cooling box 6, wherein first cooling box includes fixed cylinder 3 and movable cylinder 4;

[0043] Fixed cylinder 3 is fixedly installed on frame 1, water cooling chamber of sealed structure is equipped in fixed cylinder 3, inlet is equipped on the outer wall of fixed cylinder 3 with water cooling chamber being communicated, inlet is communicated with the outlet of material of extruder body 2, first water cooling medium inlet 33 and first water cooling medium outlet 34 being communicated with water cooling chamber are further equipped on the outer wall of fixed cylinder 3;

[0044] Movable cylinder 4 is sealed and slides in the inside of fixed cylinder 3, movable cylinder 4 is equipped with the central passage along length direction, central passage is on the same straight line with the inlet of fixed cylinder 3 and central passage is communicated with water cooling chamber of fixed cylinder 3, inlet of movable cylinder 4 and outlet of movable cylinder 4 being communicated with central passage are equipped on movable cylinder 4;

[0045] Second cooling box 6 is equipped with second water cooling passage and second water cooling medium inlet and second water cooling medium outlet being communicated with second water cooling passage, inlet and outlet being communicated with second water cooling passage are equipped on second cooling box 6, second water cooling medium inlet is located on the outer wall of second cooling box 6 close to the position of inlet, second water cooling medium outlet is located on the outer wall of second cooling box 6 close to the position of outlet;

[0046] Telescopic drive mechanism, telescopic drive mechanism is fixedly installed on frame 1, and telescopic drive mechanism is equipped with sliding connection seat 5;

[0047] Wherein, second cooling box 6 is slidably installed on frame 1, and is fixedly connected with the side of sliding connection seat 5 away from first cooling box, and the inlet of second cooling box 6 is communicated with the discharge end of first cooling box through the through hole on sliding connection seat 5;

[0048] The movable cylinder 4 is fixedly connected to the sliding connecting seat 5, and the telescopic driving mechanism is suitable for driving the movable cylinder 4 to move telescopically relative to the fixed cylinder 3 through the sliding connecting seat 5, so as to adjust the cooling time and the cooling path length of the PFA single wire in the first cooling box.

[0049] In the embodiment, as shown in Figure 1 and Figure 3 , first, the telescopic driving mechanism drives the movable cylinder 4 to move towards the fixed cylinder 3, so as to reduce the cooling path length of the PFA single wire to be cooled in the center passage. Then, the extruder body 2 is started, the material enters from the feeding inlet at the upper part of the extruder body 2, is discharged from the end part discharge port after being processed by the extruder body 2, and then enters the feeding port of the fixed cylinder 3. At the same time, the cooling water enters the fixed cylinder 3 through the water cooling medium inlet, and the PFA single wire entering the water cooling chamber of the fixed cylinder 3 is preliminarily cooled. When the PFA single wire reaches the second water cooling passage, the position of the movable cylinder 4 is adjusted through the telescopic driving mechanism, so as to change the cooling time and the cooling path length of the PFA single wire in the first cooling box, and adapt to the cooling requirements of different specifications of products. The PFA single wire preliminarily cooled in the first cooling box then passes through the through hole of the sliding connecting seat 5, enters the second water cooling passage of the second cooling box 6 from the discharge end of the first cooling box, and is secondarily cooled in the second water cooling passage of the second cooling box 6. The cooling water in the second water cooling passage of the second cooling box 6 first enters the second water cooling medium inlet close to the feeding port position of the second cooling box 6, and then is discharged from the second water cooling medium outlet close to the discharge port position, to complete the water cooling cycle.

[0050] Specifically, as shown in Figure 1 and Figure 3 , the outer periphery of one end of the movable cylinder 4 close to the feeding end of the fixed cylinder 3 is provided with an annular boss 41, the annular boss 41 and the inner wall of the fixed cylinder 3 form a sliding sealing fit, and a first sealing ring 42 is arranged between the annular boss 41 and the inner wall of the fixed cylinder 3.

[0051] The end face of the discharge end of the fixed cylinder 3 extends inward to form an annular flange 31, the annular flange 31 and the outer wall of the movable cylinder 4 form a sliding sealing fit, and a second sealing ring 32 is arranged between the annular flange 31 and the outer wall of the movable cylinder 4.

[0052] In the embodiment, as shown in Figure 1 and Figure 3 , a sealing element mounting ring groove is arranged on the outer wall of the annular boss 41 and the inner wall of the annular flange 31, and the sealing element mounting ring groove is used for mounting the first sealing ring 42 and the second sealing ring 32.

[0053] Specifically, as shown in Figure 3 , the melt extrusion equipment for PFA single wire production and preparation further comprises a pair of conveying rollers 7, which are arranged in the center passage of the movable cylinder 4 in the axial direction of the center passage.

[0054] In this embodiment, as Figure 3 As shown, a conveying roller 7 is also provided on the feed inlet of the fixed cylinder 3.

[0055] Specifically, such as Figures 1-2 As shown, a guide rail is fixedly installed at the bottom of the second cooling box 6. The guide rail extends along the length of the second water cooling channel, and a slider 9 that slides with the guide rail is fixedly installed on the frame 1.

[0056] Specifically, such as Figures 1-2 As shown, the telescopic drive mechanism includes:

[0057] Two drive sources 10 are fixedly mounted on the frame 1, and a drive wheel is fixedly mounted on the output shaft of the drive source 10.

[0058] Two lead screws 12 are rotatably mounted on the frame 1, and a driven wheel 13 is coaxially fixed at one end of the lead screw 12.

[0059] Two drive belts 14 are fitted onto the driving pulley and the driven pulley 13;

[0060] Two linear guide rails 15 are fixedly mounted on the frame 1;

[0061] The bottom of the sliding connecting seat 5 is provided with a slider assembly 16 that slides in cooperation with the linear guide rail 15;

[0062] The connecting bracket 17 is fixed on the sliding connecting seat 5, and the connecting bracket 17 is provided with a nut seat that is threaded with the lead screw 12;

[0063] The drive source 10 is adapted to drive the lead screw 12 to rotate via the transmission belt 14, thereby driving the sliding connecting seat 5 to reciprocate linear motion along the linear guide rail 15.

[0064] Specifically, such as Figure 2 As shown, drive source 10 is a motor.

[0065] In this embodiment, as Figures 1-2 As shown, the sliding connecting seat 5 is mounted on the slider assembly 16 via a mounting bracket. Two drive sources 10 drive two lead screws 12 to rotate synchronously via a transmission belt 14, thereby achieving precise control of the sliding connecting seat 5. The driving wheel on the motor output shaft and the driven wheel 13 at the end of the lead screw 12 are driven by the transmission belt 14.

[0066] Specifically, such as Figure 1 As shown, the melt extrusion equipment for PFA monofilament production also includes a temperature control component, which includes:

[0067] Temperature sensors, the temperature sensors are respectively arranged in the fixed cylinder body 3 of the first cooling box and the second water cooling channel of the second cooling box 6, and the temperature sensors are suitable for detecting the temperature in the fixed cylinder body 3 of the first cooling box and the second cooling box 6 and emitting temperature signals;

[0068] A signal display 82 is fixedly installed on the rack 1, the signal display 82 is electrically connected with the temperature sensors, and the signal display 82 is suitable for receiving the temperature signals of the temperature sensors and displaying corresponding temperature values.

[0069] In the embodiment, the melt extrusion equipment for PFA monofilament production further comprises a water circulation mechanism (not shown in the figure) and the water circulation mechanism comprises: a circulating water tank for storing the water cooling medium, a liquid storage inlet and a liquid storage outlet are arranged on the side wall of the circulating water tank; a circulating pump, the water inlet end of the circulating pump is communicated with the liquid storage outlet through a first pipeline, and the water outlet end of the circulating pump is communicated with the first water cooling medium inlet through a second pipeline; a plate heat exchanger, the plate heat exchanger is arranged on the second pipeline and comprises a first heat exchange channel and a second heat exchange channel, the first heat exchange channel is connected in series on the second pipeline, and the second heat exchange channel is communicated with a refrigerant circulation loop of a refrigeration system; the refrigeration system comprises a compressor, a condenser and an expansion valve, the compressor, the condenser, the second heat exchange channel of the plate heat exchanger and the expansion valve are sequentially communicated through pipelines to form the refrigerant circulation loop; the condenser is a wind-cooled condenser and is provided with a condensing fan; a return pipeline, one end of the return pipeline is communicated with the first water cooling medium outlet, and the other end is communicated with the liquid storage inlet, and the return pipeline is used for conveying the water cooling medium passing through the water cooling chamber back to the circulating water tank; in addition, an overflow port is arranged at the top of the circulating water tank, the overflow port prevents the water cooling medium in the circulating water tank from being higher than a preset liquid level; a flow regulating valve is arranged on the second pipeline, and is used for adjusting the flow of the water cooling medium entering the water cooling chamber; a temperature sensor is arranged on the return pipeline, and is used for detecting the temperature of the return water cooling medium; the refrigeration system further comprises a controller, the controller is electrically connected with the compressor, the condensing fan, the circulating pump and the temperature sensor, and the controller is used for controlling the corresponding components to work according to the detection result of the temperature sensor. The first cooling box is provided with a water circulation mechanism which is basically the same as the water circulation mechanism and is connected with the second water cooling medium inlet and the second water cooling medium outlet, respectively.

[0070] The above-described specific embodiments further specifically describe the technical problems, technical solutions and beneficial effects solved by the utility model, and it should be understood that the above-described specific embodiments are only specific embodiments of the utility model and are not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A melt extrusion apparatus for producing a PFA monofilament, characterized by, The utility model relates to a PFA monofilament production preparation use melt extrusion equipment, including: Frame (1); Extruder body (2), the extruder body (2) includes the upper material inlet of setting on its upper portion, and the material outlet of the die of setting in the end of extruder body (2); Water cooling assembly, the water cooling assembly includes first cooling box and second cooling box (6), wherein the first cooling box includes fixed cylinder (3) and movable cylinder (4); The fixed cylinder (3) is fixedly installed on the frame (1), a water cooling chamber with sealing structure is arranged in the fixed cylinder (3), a feeding port in communication with the water cooling chamber is arranged on the outer wall of the fixed cylinder (3), the feeding port is in communication with the material outlet of the extruder body (2), and a first water cooling medium inlet (33) and a first water cooling medium outlet (34) in communication with the water cooling chamber are further arranged on the outer wall of the fixed cylinder (3); The movable cylinder (4) is sealingly slid on the inner side of the fixed cylinder (3), the movable cylinder (4) is provided with a central passage penetrating along the length direction, the central passage is in the same straight line with the feeding port of the fixed cylinder (3) and is in communication with the water cooling chamber of the fixed cylinder (3), and the movable cylinder (4) is provided with a feeding port and a material outlet in communication with the central passage; The second cooling box (6) is provided with a second water cooling channel, a second water cooling medium inlet and a second water cooling medium outlet in communication with the second water cooling channel, a feeding port and a material outlet in communication with the second water cooling channel are arranged on the second cooling box (6), the second water cooling medium inlet is located on the outer wall of the second cooling box (6) close to the feeding port, and the second water cooling medium outlet is located on the outer wall of the second cooling box (6) close to the material outlet; The telescopic driving mechanism is fixedly installed on the frame (1), and the telescopic driving mechanism is provided with a sliding connection seat (5); The second cooling box (6) is slidably installed on the frame (1) and is fixedly connected with the side of the sliding connection seat (5) away from the first cooling box, and the feeding port of the second cooling box (6) is in communication with the material outlet end of the first cooling box through the through hole of the sliding connection seat (5); The movable cylinder (4) is fixedly connected to the sliding connection seat (5), and the telescopic driving mechanism is suitable for driving the movable cylinder (4) to move telescopically relative to the fixed cylinder (3) through the sliding connection seat (5), so as to adjust the cooling time and the cooling path length of the PFA monofilament in the first cooling box.

2. The PFA monofilament production preparation use melt extrusion equipment according to claim 1, wherein an annular boss (41) is arranged on the outer periphery of one end of the movable cylinder (4) close to the feeding end of the fixed cylinder (3), the annular boss (41) is in sliding sealing cooperation with the inner wall of the fixed cylinder (3), and a first sealing ring (42) is arranged between the annular boss (41) and the inner wall of the fixed cylinder (3). ​ The outlet end face of the fixed cylinder (3) extends inwardly to form an annular flange (31), which forms a sliding sealing fit with the outer wall of the movable cylinder (4), and a second sealing ring (32) is arranged between the annular flange (31) and the outer wall of the movable cylinder (4).

3. The PFA monofilament production preparation melt extrusion equipment according to claim 1, characterized in that, Further comprising at least one pair of conveying rollers (7) rotatably arranged in the central channel of the movable cylinder (4) in the axial direction of the central channel.

4. The PFA monofilament production preparation melt extrusion equipment according to claim 1, characterized in that, The bottom of the second cooling box (6) is fixedly provided with at least one guide rail extending in the length direction of the second water cooling channel, and the rack (1) is fixedly installed with a sliding block (9) in sliding fit with the guide rail.

5. The PFA monofilament production preparation melt extrusion equipment according to claim 1, characterized in that, The telescopic driving mechanism comprises: at least one driving source (10) fixedly installed on the rack (1), a driving wheel fixedly arranged on the output shaft of the driving source (10); at least one lead screw (12) rotatably installed on the rack (1), a driven wheel (13) coaxially fixedly arranged at one end of the lead screw (12); at least one transmission belt (14) sleeved on the driving wheel and the driven wheel (13); at least one linear guide rail (15) fixedly installed on the rack (1); the bottom of the sliding connection seat (5) is provided with a sliding block assembly (16) in sliding fit with the linear guide rail (15); a connecting bracket (17) fixed on the sliding connection seat (5), the connecting bracket (17) being provided with a nut seat in threaded fit with the lead screw (12); wherein the driving source (10) is adapted to drive the lead screw (12) to rotate through the transmission belt (14), and in turn drive the sliding connection seat (5) to reciprocatingly move linearly along the linear guide rail (15).

6. The PFA monofilament production preparation melt extrusion equipment according to claim 5, characterized in that, the driving source (10) is a motor.

7. The PFA monofilament production preparation melt extrusion equipment according to claim 1, characterized in that, Further comprising a temperature control assembly comprising: temperature sensors respectively arranged in the fixed cylinder (3) of the first cooling box and the second water cooling channel of the second cooling box (6), the temperature sensors being adapted to detect the temperature in the fixed cylinder (3) of the first cooling box and the second cooling box (6) and emit temperature signals; A signal display (82) is fixedly installed on the rack (1), the signal display (82) is electrically connected with the temperature sensor, the signal display (82) is suitable for receiving the temperature signal of the temperature sensor and displaying the corresponding temperature value.

Images