Soft super-elastic polyester integrated production equipment and production method

Abstract

The application discloses a soft super-elastic polyester integrated production equipment capable of rapid forming and a production method thereof. The equipment comprises a bottom plate, a sleeve ring, a partition plate, a mixing tank and a polycondensation tank. The mixing tank is internally provided with an extension rod, one end of the extension rod is provided with a hollow rod, the other end of the extension rod is provided with a stirring blade, and the bottom plate is provided with a driving mechanism. The partition plate is internally provided with a threaded seat, is provided with a communication port on the partition plate, is internally provided with a placing groove and a hatch, and is internally provided with a hydraulic cavity. The hydraulic cavity is provided with a clamping column at one end and is provided with a sliding column at the other end. The mixing tank is provided with a feeding port, the hollow rod is provided with a circular ring, the polycondensation tank is provided with an exhaust port, the polycondensation tank is provided with a discharging port, and the discharging port is communicated with a spinning device. The hollow rod drives the extension rod to rotate in reverse, the extension rod rotates and reciprocally moves left and right in the mixing tank at the same time, and pure terephthalic acid in the mixing tank is uniformly mixed with 1,4-butanediol.

Description

Technical Field

[0001] This invention relates to the field of polyester production technology, specifically to an integrated production equipment and method for rapidly moldable soft ultra-elastic polyester. Background Technology

[0002] PBT is short for polybutylene terephthalate. PBT high-elasticity yarn possesses superior elastic recovery and stability, with elasticity exceeding that of nylon; its chemical resistance is better than spandex; it can be dyed at room temperature and pressure without a carrier, exhibiting high color fastness, good dimensional stability, anti-pilling, and antistatic properties, and its price is significantly lower than spandex. Therefore, PBT high-elasticity yarn has broad application prospects in hygiene materials, clothing, and other fields, making it a highly competitive new product in the future elastic fiber market.

[0003] The production of PBT high-elasticity yarn requires the initial preparation of PBT melt. PBT melt is synthesized from 1,4-butanediol (BDO) and terephthalic acid (TPA) or dimethyl terephthalate (DMT) via esterification or transesterification. When producing PBT melt via esterification, 1,4-butanediol and terephthalic acid must first be prepared into a slurry. However, 1,4-butanediol and terephthalic acid are prone to uneven mixing, and precipitation easily occurs within the slurry, leading to incomplete esterification and ultimately wasting raw materials. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides an integrated production equipment and method for rapidly forming soft, ultra-elastic polyester.

[0005] The technical solution of the present invention is: a flexible ultra-elastic polyester integrated production equipment that can be rapidly formed, including a horizontally arranged base plate, a collar arranged vertically above the base plate, a partition plate fixedly arranged inside the collar, and a mixing tank and a polycondensation tank respectively arranged at both ends of the partition plate and connected to the collar.

[0006] Both the mixing tank and the polycondensation tank are fitted with connecting rings, and the bottom plate is provided with connecting seats that are fixedly connected to the sleeve rings and connecting rings one by one.

[0007] A telescopic rod is provided horizontally inside the mixing tank. One end of the telescopic rod passes through the partition and is fitted with a hollow rod. The other end of the telescopic rod is fitted with a stirring blade. The hollow rod is splined to the telescopic rod. One end of the hollow rod passes through one end of the polycondensation tank, and the other end of the hollow rod is rotatably connected to the partition. A drive mechanism for driving the hollow rod to rotate is provided on the bottom plate.

[0008] A threaded seat is rotatably connected inside the partition, and a telescopic rod passes through the threaded seat and is threadedly connected to the threaded seat. The partition is provided with a communication port for connecting the mixing tank and the polycondensation tank. The partition is provided with a placement groove and a door that is slidably connected to the placement groove and is used to control the opening and closing of the communication port.

[0009] The bulkhead is equipped with a hydraulic chamber. One end of the hydraulic chamber is slidably sealed to a locking pin that uses a sliding limit threaded seat to rotate. The other end of the hydraulic chamber is slidably sealed to a sliding pin that extends into the placement slot and is fixedly connected to the hatch. A hydraulic pump is provided on the side wall of the collar. The hydraulic pump is connected to the hydraulic chamber through a liquid channel provided in the bulkhead.

[0010] The mixing tank has a feed inlet at one end, and both the mixing tank and the polycondensation tank are equipped with a vacuum pump, an electric heater and a temperature sensor. Multiple rings are fitted on a hollow rod inside the polycondensation tank, and each ring is fixedly connected to the hollow rod by multiple spokes. An exhaust port is provided on the upper side wall of the polycondensation tank, and a discharge port is provided on the lower side wall of the polycondensation tank. A feed pump is provided on the discharge port, and the discharge port is connected to a spinning device located on one side of the polycondensation tank.

[0011] Note: The above-mentioned equipment drive mechanism can drive the telescopic rod to rotate forward and backward through the hollow rod, so that the telescopic rod can cooperate with the threaded seat to move back and forth in the mixing tank while rotating, so that the purified terephthalic acid and 1,4-butanediol in the mixing tank are evenly mixed. The hydraulic pump can control the clasp to shorten and separate from the threaded seat, so that the threaded seat can rotate with the telescopic rod and avoid damage to the telescopic rod when the hollow rod rotates continuously in one direction.

[0012] Furthermore, the threaded seat sidewall is provided with a plurality of baffles for engaging with the locking pin to restrict the rotation of the threaded seat.

[0013] Note: The baffle is designed to restrict the rotation of the threaded seat when the locking pin extends, preventing the threaded seat from slipping and rotating, thus improving the stability of the equipment.

[0014] Furthermore, the drive mechanism includes a motor mounted on the base plate, a first pulley sleeved on the output shaft of the motor, and a second pulley sleeved on one end of the hollow rod and connected to the first pulley via a transmission belt.

[0015] Explanation: The motor can drive the first pulley to rotate, which in turn drives the second pulley to rotate via the transmission belt.

[0016] Furthermore, the mixing tank is rotatably connected to the collar, and the mixing tank is rotatably connected to the corresponding connecting ring. A toothed ring is fixedly sleeved on the side wall of the mixing tank. The motor is located below the mixing tank, and a gear for meshing with the toothed ring is sleeved on the motor output shaft.

[0017] Note: When the motor rotates, it drives the gear, which in turn drives the mixing tank to rotate via the gear ring, further improving the mixing effect of purified terephthalic acid and 1,4-butanediol.

[0018] Furthermore, each of the rings has a notch on its outer side wall corresponding to one of the spoke positions, and a scraper is slidably provided in each notch. A spring rod that is slidably connected to each of the spokes corresponding to the scrapers is pressed by a telescopic rod. One end of each spring rod passes through the corresponding ring and is fixedly connected to the corresponding scraper, and the other end of each spring rod extends into the hollow rod.

[0019] Note: When it is necessary to clean the side wall of the polycondensation tank, the telescopic rod can be shortened to squeeze the spring rod, causing the spring rod to slide outward. The spring rod will drive the scraper to extend outward, so that the scraper can clean the side wall of the polycondensation tank when the ring rotates.

[0020] Furthermore, one end of the telescopic rod is chamfered, and the other ends of the plurality of spring rods are also chamfered.

[0021] Note: After the chamfering treatment of the telescopic rod and the spring rod, it is easier for the telescopic rod to push the spring rod outward, avoiding the spring rod getting stuck in the telescopic rod.

[0022] Furthermore, each of the multiple blades of the stirring blade is provided with air holes for purging the inner wall of the mixing tank. The telescopic rod is provided with a gas channel communicating with the multiple air holes. An air bladder is slidably provided inside the hollow rod. An air inlet pipe and an air outlet pipe are respectively provided at both ends of the air bladder. Both the air inlet pipe and the air outlet pipe are provided with a one-way valve. The air outlet pipe of the air bladder is fixedly connected to and communicates with the gas channel. The other end of the hollow rod is provided with a through hole corresponding to the position of the air inlet pipe of the air bladder. A sleeve that engages with the through hole is detachably connected to the air inlet pipe.

[0023] Instructions: When cleaning the inner wall of the mixing tank, the telescopic rod can be shortened. The telescopic rod will move the airbag, aligning the airbag's inlet pipe with the through hole. The sleeve is then installed on the airbag, locking it into place. At this point, the telescopic rod is moved back and forth, and the airbag no longer follows the telescopic rod. When the telescopic rod extends, the airbag will inhale and expand through the air inlet. As the telescopic rod shortens, the gas inside the airbag will enter the gas channel through the air outlet and be released from the air hole to purge the inner wall of the mixing tank when the telescopic rod rotates and shortens.

[0024] Furthermore, a power chamber is provided at the notch in the middle of the liquid channel. The power chamber is cylindrical and has an impeller rotating inside. A liquid inlet is provided on each side wall of the power chamber located on both sides of the impeller. The two liquid inlets are symmetrically arranged with respect to the center of the impeller. The two liquid inlets are connected to the two ends of the notch in the middle of the liquid channel.

[0025] One end of the impeller is fixedly provided with a shaft, and one end of the shaft passes through the power chamber and is fitted with a transmission sleeve;

[0026] The transmission sleeve is rotatably connected to the partition plate, and one end of the transmission sleeve passes through the partition plate and is fixedly fitted with a cam. The inner wall of the transmission sleeve is provided with ratchet teeth, and one end of the shaft is provided with a pawl for cooperating with the ratchet teeth to perform unidirectional transmission. The partition plate is provided with a liquid bladder for cooperating with the cam to release the catalyst into the polycondensation tank.

[0027] Explanation: When hydraulic oil is injected into the hydraulic chamber, the hydraulic oil can drive the impeller to rotate, which in turn drives the cam to rotate, thereby squeezing the liquid bladder to release the catalyst into the condensation tank. At the same time, the ratchet and pawl can ensure that the impeller drives the cam in one direction, thus preventing the liquid bladder from being compressed when the hydraulic oil in the hydraulic chamber is extracted.

[0028] On the other hand, the present invention provides a production method for producing ultra-high elastic polyester using the above-mentioned equipment, comprising the following steps:

[0029] S1. In the initial state, the hatch is closed and the threaded seat is restricted by the locking post and cannot rotate. Purified terephthalic acid and 1,4-butanediol are added into the mixing tank through the feed port. The drive mechanism is started to make the hollow rod rotate in both directions. The hollow rod will drive the telescopic rod to rotate in both directions. Since the threaded seat is fixed, the telescopic rod will slide back and forth along the hollow rod while rotating, so that the stirring blade can move back and forth in the mixing tank, so that the purified terephthalic acid and 1,4-butanediol are evenly mixed into a slurry.

[0030] S2. Add tetrabutyl titanate to the slurry and turn on the electric heater in the mixing tank to esterify the slurry in the mixing tank at 240℃~260℃. After esterification, the esterified material is obtained.

[0031] S3. Turn on the vacuum pump in the mixing tank and turn on the drive mechanism to stir the esterified material with the telescopic rod, so that the esterified material is pre-polymerized at 220-250°C. After the pre-polymerization is completed, the pre-polymerized material is obtained.

[0032] S4. The hydraulic oil in the hydraulic chamber is extracted by the hydraulic pump, causing the hatch to slide upward to open the connecting port. At the same time, the locking pin slides downward, and the threaded seat can rotate. The pre-polymerized material enters the polycondensation tank through the connecting port, causing the drive mechanism to drive the hollow rod to rotate in the forward direction. At this time, the threaded seat will rotate with the telescopic rod. The telescopic rod cannot move left or right. The hollow rod will drive the ring to rotate. When the ring rotates, it will carry the pre-polymerized material to form a liquid film, so that the pre-polymerized material will undergo polycondensation under vacuum. After the polycondensation is completed, a melt is obtained.

[0033] S5. The melt is sequentially transported to the spinning device via a feed pump, and the melt is spun by the spinning device to obtain soft ultra-elastic polyester.

[0034] Explanation: The above production method uses a hollow rod to drive a telescopic rod to rotate in both directions, so that the telescopic rod can move back and forth in the mixing tank while rotating, so that purified terephthalic acid and 1,4-butanediol are mixed evenly, improving the utilization rate of raw materials, and the soft ultra-elastic polyester has excellent elastic recovery performance and elastic stability.

[0035] Furthermore, the molar mass ratio of purified terephthalic acid to 1,4-butanediol is 1:1.5 to 2.

[0036] Note: The purified terephthalic acid in the above ratio reacts fully with 1,4-butanediol, resulting in high raw material utilization and reduced waste.

[0037] The beneficial effects of this invention are:

[0038] (1) The drive mechanism of the device of the present invention can drive the telescopic rod to rotate in both directions through the hollow rod, so that the telescopic rod can cooperate with the threaded seat and move back and forth in the mixing tank while rotating, so that the purified terephthalic acid and 1,4-butanediol in the mixing tank are evenly mixed. Furthermore, the clamp can be shortened and separated from the threaded seat by the hydraulic pump, so that the threaded seat can rotate with the telescopic rod, thus avoiding damage to the telescopic rod when the hollow rod rotates continuously in one direction.

[0039] (2) When the equipment of the present invention needs to clean the side wall of the polycondensation tank, the telescopic rod can be controlled to shorten the compression spring rod, so that the spring rod slides outward and the spring rod will drive the scraper to extend outward, so that the scraper can clean the side wall of the polycondensation tank when the ring rotates.

[0040] (3) The method of the present invention uses a hollow rod to drive the telescopic rod to rotate in both directions, so that the telescopic rod can move back and forth in the mixing tank while rotating, so that purified terephthalic acid and 1,4-butanediol are mixed evenly, improving the utilization rate of raw materials, and the prepared soft ultra-elastic polyester has excellent elastic recovery performance and elastic stability. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0042] Figure 2 This is a cross-sectional view of Embodiment 1 of the present invention;

[0043] Figure 3 This is a schematic diagram of the internal structure of the mixing tank in Embodiment 1 of the present invention;

[0044] Figure 4 This is a schematic diagram of the internal structure of the partition in Embodiment 1 of the present invention;

[0045] Figure 5 This is a schematic diagram of the threaded seat structure in Embodiment 1 of the present invention;

[0046] Figure 6This is a schematic diagram of the ring structure in Embodiment 4 of the present invention;

[0047] Figure 7 This is a sectional view of the annulus in Embodiment 4 of the present invention;

[0048] Figure 8 This is a cross-sectional view of the hollow rod in Embodiment 4 of the present invention;

[0049] Figure 9 This is a cross-sectional view of the hollow rod in Embodiment 5 of the present invention;

[0050] Figure 10 This is a schematic diagram of the stirring blade structure in Embodiment 5 of the present invention;

[0051] Figure 11 This is a schematic diagram of the internal structure of the partition in Embodiment 6 of the present invention;

[0052] Figure 12 This is a schematic diagram of the power cavity structure in Embodiment 6 of the present invention;

[0053] Figure 13 This is a schematic diagram of the impeller structure in Embodiment 6 of the present invention;

[0054] Figure 14 This is a schematic diagram of the cam structure in Embodiment 6 of the present invention;

[0055] Among them, 1-base plate, 11-connecting seat, 12-motor, 13-first pulley, 14-gear, 2-ring, 21-partition plate, 211-impeller, 212-shaft, 213-transmission sleeve, 214-cam, 215-liquid inlet, 216-liquid bladder, 22-threaded seat, 221-baffle, 23-door, 24-hydraulic chamber, 25-clamping column, 26-sliding column, 27-hydraulic... Pump, 3-mixing tank, 31-feed inlet, 32-toothed ring, 4-condensation tank, 41-hollow rod, 411-second pulley, 412-through hole, 42-telescopic rod, 421-air bladder, 422-gas passage, 43-stirring blade, 431-air hole, 44-ring, 441-spoke, 442-spring rod, 45-scraper, 46-exhaust port, 47-discharge port, 5-spinning device. Detailed Implementation

[0056] The present invention will now be described in more detail with reference to specific embodiments, so as to better demonstrate the advantages of the present invention.

[0057] Example 1

[0058] like Figure 1As shown, the integrated production equipment for quick-forming soft ultra-elastic polyester includes a horizontally arranged base plate 1, a collar 2 vertically arranged above the base plate 1, a partition 21 fixedly arranged inside the collar 2, and a mixing tank 3 and a polycondensation tank 4 respectively arranged at the left and right ends of the partition 21 and connected to the collar 2.

[0059] Both the mixing tank 3 and the polycondensation tank 4 are fitted with connecting rings, and the bottom plate 1 is provided with connecting seats 11 that are fixedly connected to the sleeve ring 2 and the connecting ring in a one-to-one correspondence.

[0060] like Figure 2 As shown, a telescopic rod 42 is provided horizontally inside the mixing tank 3. The right end of the telescopic rod 42 passes through the partition 21 and is fitted with a hollow rod 41. The left end of the telescopic rod 42 is fitted with a stirring blade 43. The hollow rod 41 is splined to the telescopic rod 42, and the right end of the hollow rod 41 passes through the right end of the polycondensation tank 4. The left end of the hollow rod 41 is rotatably connected to the partition 21. A drive mechanism for driving the hollow rod 41 to rotate is provided on the bottom plate 1.

[0061] The drive mechanism includes a motor 12 mounted on the base plate 1, the motor 12 being a commercially available motor, a first pulley 13 mounted on the output shaft of the motor 12, and a second pulley 411 mounted on the right end of the hollow rod 41 and connected to the first pulley 13 via a transmission belt.

[0062] The mixing tank 3 is rotatably connected to the collar 2, and the mixing tank 3 is rotatably connected to the corresponding connecting ring. A toothed ring 32 is fixedly sleeved on the side wall of the mixing tank 3. The motor 12 is located below the mixing tank 3, and a gear 14 for meshing with the toothed ring 32 is sleeved on the output shaft of the motor 12.

[0063] like Figure 3 As shown, a threaded seat 22 is rotatably connected inside the partition 21, and a telescopic rod 42 passes through the threaded seat 22 and is threadedly connected to the threaded seat 22. The partition 21 is provided with a communication port for connecting the mixing tank 3 and the polycondensation tank 4. The partition 21 is provided with a placement groove and a door 23 that is slidably connected to the placement groove and is used to control the opening and closing of the communication port.

[0064] like Figure 4 As shown, a hydraulic chamber 24 is provided inside the partition 21. The upper end of the hydraulic chamber 24 is slidably sealed to a locking pin 25 that rotates by means of a sliding limiting threaded seat 22. The lower end of the hydraulic chamber 24 is slidably sealed to a sliding pin 26. The sliding pin 26 extends into the placement groove and is fixedly connected to the hatch 23. A hydraulic pump 27 is provided on the side wall of the collar 2. The hydraulic pump 27 is connected to the hydraulic chamber 24 through a liquid channel provided inside the partition 21. The hydraulic pump 27 adopts existing technology products.

[0065] The mixing tank 3 is provided with a feed inlet 31 at the left end. Both the mixing tank 3 and the polycondensation tank 4 are equipped with a vacuum pump, an electric heater and a temperature sensor. The vacuum pump, electric heater and temperature sensor are all existing technology products. Ten rings 44 are fitted on the hollow rod 41 located in the polycondensation tank 4. Each ring 44 is fixedly connected to the hollow rod 41 through three spokes 441. An exhaust port 46 is provided on the upper side wall of the polycondensation tank 4. An outlet 47 is provided on the lower side wall of the polycondensation tank 4. A feed pump is provided on the outlet 47. The feed pump is an existing technology product. The outlet 47 is connected to the spinning device 5 located on the right side of the polycondensation tank 4. The spinning device 5 is an existing technology product.

[0066] like Figure 5 As shown, the threaded seat 22 has four baffles 221 on its side wall for cooperating with the locking pin 25 to restrict the rotation of the threaded seat 22;

[0067] The production method for producing ultra-high elastic polyester using the above-mentioned equipment includes the following steps:

[0068] S1. In the initial state, the hatch 23 is closed, and the threaded seat 22 is restricted by the locking post 25 and cannot rotate. Purified terephthalic acid and 1,4-butanediol are added into the mixing tank 3 through the feed port 31. The drive mechanism is started to make the hollow rod 41 rotate in both directions. The hollow rod 41 will drive the telescopic rod 42 to rotate in both directions. Since the threaded seat 22 is fixed, the telescopic rod 42 will slide back and forth along the hollow rod 41 while rotating, so that the stirring blade 43 can move back and forth in the mixing tank 3, so that the purified terephthalic acid and 1,4-butanediol are uniformly mixed into a slurry; wherein, the molar mass ratio of purified terephthalic acid to 1,4-butanediol is 1:1.8.

[0069] S2. Add tetrabutyl titanate to the slurry and turn on the electric heater in the mixing tank 3 to esterify the slurry in the mixing tank 3 at 250°C. After esterification, the esterified material is obtained.

[0070] S3. Turn on the vacuum pump in the mixing tank 3 and turn on the drive mechanism to make the telescopic rod 42 stir the esterified material, so that the esterified material is pre-condensed at 240°C. After the pre-condensation is completed, the pre-condensed material is obtained.

[0071] S4. The hydraulic oil in the hydraulic chamber 24 is extracted by the hydraulic pump 27, causing the hatch 23 to slide upward to open the communication port. At the same time, the locking pin 25 slides downward. At this time, the threaded seat 22 can rotate. The pre-polymerized material enters the polymerization tank 4 through the communication port, causing the drive mechanism to drive the hollow rod 41 to rotate in the forward direction. At this time, the threaded seat 22 will rotate with the telescopic rod 42. The telescopic rod 42 cannot move left or right. The hollow rod 41 will drive the ring 44 to rotate. When the ring 44 rotates, it will carry the pre-polymerized material to form a liquid film, so that the pre-polymerized material will be polymerized in a vacuum state. After the polymerization is completed, a melt is obtained.

[0072] S5. The melt is sequentially transported to the spinning device via a feed pump, and the melt is spun by the spinning device to obtain soft ultra-elastic polyester.

[0073] Example 2

[0074] This embodiment is basically the same as Embodiment 1, except that the molar mass ratio of purified terephthalic acid to 1,4-butanediol is 1:1.5; the slurry in mixing tank 3 is esterified at 240°C; and the esterified material is prepolymerized at 220°C.

[0075] Example 3

[0076] This embodiment is basically the same as Embodiment 1, except that the molar mass ratio of purified terephthalic acid to 1,4-butanediol is 1:2; the slurry in mixing tank 3 is esterified at 260°C; and the esterified material is prepolymerized at 250°C.

[0077] Example 4

[0078] like Figure 6 As shown, this embodiment is basically the same as embodiment 1, except that each of the rings 44 has a notch on its outer side wall corresponding to the position of one of the spokes 441, and a scraper 45 is slidably disposed in each notch, as shown. Figure 7 As shown, each of the ten scraper blades 45 has a spring rod 442 slidably connected within its spoke 441, which slides by being pressed by a telescopic rod 42. The spring rods 442 are existing technology products. The lower ends of all ten spring rods 442 pass through the corresponding rings 44 and are fixedly connected to the corresponding scraper blades 45. The upper ends of all ten spring rods 442 extend into the hollow rod 41. Figure 8 As shown, the right end of the telescopic rod 42 is chamfered, and the upper ends of all ten spring rods 442 are also chamfered.

[0079] The working principle of the above-mentioned ring 44 is as follows: when it is necessary to clean the inner wall of the polycondensation tank 4, the telescopic rod 42 is controlled to move to the right and shorten. When the telescopic rod 42 moves to the right, it will squeeze the upper end of the spring rod 442, causing the spring rod 442 to push the scraper 45 outward. At this time, as the ring 44 rotates, the scraper 45 will clean the inner wall of the polycondensation tank 4.

[0080] Example 5

[0081] like Figure 9 , 10 As shown, this embodiment is basically the same as embodiment 1, except that each of the three blades of the stirring blade 43 is provided with an air hole 431 for purging the inner wall of the mixing tank 3. The telescopic rod 42 is provided with a gas channel 422 communicating with the three air holes 431. An air bladder 421 is slidably provided inside the hollow rod 41. An air outlet pipe and an air inlet pipe are respectively provided at the left and right ends of the air bladder 421, and a one-way valve is provided in both the air inlet pipe and the air outlet pipe. The one-way valve adopts the existing technology. The air intake pipe has a one-way valve that connects to the airbag 421 from the outside, and a one-way valve that connects to the outside from the airbag 421. The airbag 421's air outlet pipe is fixedly connected to and connected to the gas channel 422. The right end of the hollow rod 41 has a through hole 412 corresponding to the position of the air intake pipe of the airbag 421. The length of the air intake pipe is 5cm longer than the through hole 412, and a sleeve for engaging with the through hole 412 is detachably connected to the air intake pipe. The sleeve and the air intake pipe are connected by threads.

[0082] The working principle of the hollow rod 41 is as follows: In the initial state, the sleeve is not connected to the air inlet pipe. When the telescopic rod 42 moves normally left and right, the air bag 421 will move with the telescopic rod 42. When it is necessary to clean the inner wall of the mixing tank 3, first control the telescopic rod 42 to move to the right to shorten it. When the air bag 421 moves to the right with the telescopic rod 42, the air inlet pipe will connect with the through hole 412, so that the air inlet pipe extends out of the through hole. At this time, the sleeve is connected to the air inlet pipe to fix the air inlet pipe. Control the telescopic rod 42 to move back and forth left and right. When the telescopic rod 42 moves to the left, the air bag 421 no longer moves. At this time, the air bag 421 is inflated through the air inlet pipe. When the telescopic rod 42 moves to the right, the air bag 421 is compressed, and the gas in the air bag 421 is released from the air hole through the gas channel to purge the inner wall of the mixing tank 3.

[0083] Example 6

[0084] like Figure 11 As shown, this embodiment is basically the same as embodiment 1, except that a power chamber is provided at the notch in the middle of the liquid channel, as... Figure 12As shown, the power chamber is cylindrical and has an impeller 211 rotating inside. Each side wall of the power chamber on both sides of the impeller 211 is provided with a liquid inlet 215. The two liquid inlets 215 are symmetrically arranged with respect to the center of the impeller 211. The two liquid inlets 215 are connected to the two ends of the notch in the middle of the liquid channel.

[0085] like Figure 13 As shown, the right end of the impeller 211 is fixedly provided with a shaft 212, and the right end of the shaft 212 passes through the power chamber and is fitted with a transmission sleeve 213;

[0086] like Figure 14 As shown, the transmission sleeve 213 is rotatably connected to the partition plate 21, and the front end of the transmission sleeve 213 passes through the partition plate 21 and is fixedly fitted with a cam 214. The inner wall of the transmission sleeve 213 is provided with ratchet teeth, and the front end of the shaft 212 is provided with a pawl for cooperating with the ratchet teeth for one-way transmission. The pawl is rotatably connected to a rotating shaft on the shaft 212, and a torsion spring is fitted on the rotating shaft. The partition plate 21 is provided with a liquid bladder 216 for rotatably cooperating with the cam 214 to release the catalyst into the polycondensation tank 4. The upper end of the liquid bladder 216 is provided with an air intake, and a one-way valve is provided at the air intake. The one-way valve adopts a prior art product, and the one-way valve is unidirectionally connected from the outside to the liquid bladder 216. The catalyst is tetrabutyl titanate.

[0087] The working principle of the liquid bladder 216 is as follows: When the hydraulic pump 27 injects hydraulic oil into the hydraulic chamber 24 and closes the hatch 23, the hydraulic oil enters the power chamber and drives the impeller 211 to rotate, causing the impeller 211 to drive the shaft 212 to rotate clockwise. At this time, the pawl engages the ratchet teeth, causing the shaft 212 to drive the cam 214 to rotate. During the rotation of the cam 214, the liquid bladder 216 will be squeezed, causing the liquid bladder 216 to release tetrabutyl titanate into the polycondensation tank 4. Since tetrabutyl titanate will be hydrolyzed in the mixing tank 3, adding tetrabutyl titanate to the polycondensation tank 4 can avoid insufficient tetrabutyl titanate during the polycondensation reaction.

Claims

1. A rapid prototyping integrated production equipment for soft, ultra-elastic polyester, characterized in that: It includes a horizontally arranged base plate (1), a vertically arranged collar (2) above the base plate (1), a partition plate (21) fixedly arranged inside the collar (2), and a mixing tank (3) and a polycondensation tank (4) respectively arranged at both ends of the partition plate (21) and connected to the collar (2). Both the mixing tank (3) and the polycondensation tank (4) are fitted with connecting rings, and the bottom plate (1) is provided with connecting seats (11) that are fixedly connected to the sleeve ring (2) and the connecting ring in a one-to-one correspondence. A telescopic rod (42) is provided horizontally inside the mixing tank (3). One end of the telescopic rod (42) passes through the partition (21) and is fitted with a hollow rod (41). The other end of the telescopic rod (42) is fitted with a stirring blade (43). The hollow rod (41) is splined to the telescopic rod (42). One end of the hollow rod (41) passes through one end of the polycondensation tank (4), and the other end of the hollow rod (41) is rotatably connected to the partition (21). A driving mechanism for driving the hollow rod (41) to rotate is provided on the bottom plate (1). A threaded seat (22) is rotatably connected inside the partition (21). A telescopic rod (42) passes through the threaded seat (22) and is threadedly connected to the threaded seat (22). The partition (21) is provided with a communication port for connecting the mixing tank (3) and the polycondensation tank (4). The partition (21) is provided with a placement groove and a hatch (23) that is slidably connected to the placement groove and is used to control the opening and closing of the communication port. A hydraulic chamber (24) is provided inside the partition (21). One end of the hydraulic chamber (24) is slidably sealed to a locking pin (25) that rotates by means of a sliding limiting threaded seat (22). The other end of the hydraulic chamber (24) is slidably sealed to a sliding pin (26). The sliding pin (26) extends into the placement slot and is fixedly connected to the hatch (23). A hydraulic pump (27) is provided on the side wall of the collar (2). The hydraulic pump (27) is connected to the hydraulic chamber (24) through a liquid channel provided inside the partition (21). A feed inlet (31) is provided at one end of the mixing tank (3), and a vacuum pump, an electric heater and a temperature sensor are provided in both the mixing tank (3) and the polycondensation tank (4). Multiple rings (44) are fitted on the hollow rod (41) located in the polycondensation tank (4). Each ring (44) is fixedly connected to the hollow rod (41) through multiple spokes (441). An exhaust port (46) is provided on the upper side wall of the polycondensation tank (4), and a discharge port (47) is provided on the lower side wall of the polycondensation tank (4). A feed pump is provided on the discharge port (47), and the discharge port (47) is connected to a spinning device (5) located on one side of the polycondensation tank (4).

2. The integrated production equipment for rapidly prototyping soft ultra-elastic polyester according to claim 1, characterized in that, The threaded seat (22) has a plurality of baffles (221) on its side wall for cooperating with the locking pin (25) to restrict the rotation of the threaded seat (22).

3. The integrated production equipment for rapidly prototyping soft ultra-elastic polyester according to claim 1, characterized in that, The drive mechanism includes a motor (12) mounted on a base plate (1), a first pulley (13) mounted on the output shaft of the motor (12), and a second pulley (411) mounted on one end of a hollow rod (41) and connected to the first pulley (13) via a transmission belt.

4. The integrated production equipment for rapidly prototyping soft ultra-elastic polyester according to claim 3, characterized in that, The mixing tank (3) is rotatably connected to the collar (2), and the mixing tank (3) is rotatably connected to the corresponding connecting ring. A toothed ring (32) is fixedly sleeved on the side wall of the mixing tank (3). The motor (12) is located below the mixing tank (3), and a gear (14) for meshing with the toothed ring (32) is sleeved on the output shaft of the motor (12).

5. The integrated production equipment for rapidly prototyping soft ultra-elastic polyester according to claim 1, characterized in that, Each of the rings (44) has a notch on its outer side wall corresponding to the position of one of the spokes (441). A scraper (45) is slidably provided in each notch. A spring rod (442) is slidably connected in the spokes (441) corresponding to the scrapers (45) by being squeezed by a telescopic rod (42). One end of the spring rod (442) passes through the corresponding ring (44) and is fixedly connected to the corresponding scraper (45). The other end of the spring rod (442) extends into the hollow rod (41).

6. The integrated production equipment for rapidly prototyping soft ultra-elastic polyester according to claim 5, characterized in that, One end of the telescopic rod (42) is chamfered, and the other end of the multiple spring rods (442) is also chamfered.

7. The integrated production equipment for rapidly prototyping soft ultra-elastic polyester according to claim 1, characterized in that, The stirring blade (43) has multiple blades with air holes (431) for blowing the inner wall of the mixing tank (3). The telescopic rod (42) has a gas channel (422) that communicates with the multiple air holes (431). The hollow rod (41) has an air bladder (421) that slides inside. The air bladder (421) has an inlet pipe and an outlet pipe at both ends, and both the inlet pipe and the outlet pipe have a one-way valve. The outlet pipe of the air bladder (421) is fixedly connected to and communicates with the gas channel (422). The other end of the hollow rod (41) has a through hole (412) that corresponds to the position of the inlet pipe of the air bladder (421), and the inlet pipe has a sleeve that is detachably connected to it for engaging with the through hole (412).

8. The integrated production equipment for rapidly prototyping soft ultra-elastic polyester according to claim 1, characterized in that, A power chamber is provided at the gap in the middle of the liquid channel. The power chamber is cylindrical and has an impeller (211) rotating inside. A liquid inlet (215) is provided on each side wall of the power chamber on both sides of the impeller (211). The two liquid inlets (215) are symmetrically arranged with respect to the center of the impeller (211). The two liquid inlets (215) are connected to the two ends of the gap in the middle of the liquid channel. One end of the impeller (211) is fixedly provided with a shaft (212), and one end of the shaft (212) passes through the power chamber and is fitted with a transmission sleeve (213). The transmission sleeve (213) is rotatably connected to the partition (21), and one end of the transmission sleeve (213) passes through the partition (21) and is fixedly fitted with a cam (214). The inner wall of the transmission sleeve (213) is provided with ratchet teeth, and one end of the shaft (212) is provided with a pawl for cooperating with the ratchet teeth to perform unidirectional transmission. The partition (21) is provided with a liquid bladder (216) for cooperating with the cam (214) to release the catalyst into the polycondensation tank (4).

9. A method for producing soft, ultra-elastic polyester, characterized in that, The production method using the integrated production equipment according to any one of claims 1 to 8 includes the following steps: S1. In the initial state, the hatch (23) is closed and the threaded seat (22) is restricted by the locking post (25) and cannot rotate. Purified terephthalic acid and 1,4-butanediol are added into the mixing tank (3) through the feed port (31). The drive mechanism is started to make the hollow rod (41) rotate in the forward and reverse directions. The hollow rod (41) drives the telescopic rod (42) to rotate in the forward and reverse directions. Since the threaded seat (22) is fixed, the telescopic rod (42) slides back and forth along the hollow rod (41) while rotating, so that the stirring blade (43) can move back and forth in the mixing tank (3) to make the purified terephthalic acid and 1,4-butanediol evenly mixed into a slurry. S2. Add tetrabutyl titanate to the slurry and turn on the electric heater in the mixing tank (3) to esterify the slurry in the mixing tank (3) at 240℃~260℃. After esterification, the esterified material is obtained. S3. Turn on the vacuum pump in the mixing tank (3) and turn on the drive mechanism to make the telescopic rod (42) stir the esterified material, so that the esterified material is pre-condensed at 220~250℃, and the pre-condensed material is obtained after the pre-condensation is completed. S4. The hydraulic oil in the hydraulic chamber (24) is extracted by the hydraulic pump (27), so that the hatch (23) slides upward to open the connecting port. At the same time, the locking pin (25) slides downward. At this time, the threaded seat (22) can rotate. The pre-condensed material enters the condensation tank (4) through the connecting port, so that the drive mechanism drives the hollow rod (41) to rotate in the forward direction. At this time, the threaded seat (22) rotates with the telescopic rod (42). The telescopic rod (42) cannot move left or right. The hollow rod (41) drives the ring (44) to rotate. When the ring (44) rotates, it carries the pre-condensed material to form a liquid film, so that the pre-condensed material is condensed in a vacuum state. After the condensation is completed, the melt is obtained. S5. The melt is sequentially transported to the spinning device via a feed pump, and the melt is spun by the spinning device to obtain soft ultra-elastic polyester.

Images