A PCL supercritical foaming device and foaming method

Abstract

The present invention discloses a PCL supercritical foaming device and foaming method, relating to the technical field of PCL foaming equipment. The device comprises a reactor, a feed pipe for adding raw materials installed on the reactor, a bottom plate provided at the bottom of the reactor, a vacuum pump installed on one side of the top of the reactor, an air pipe installed at the input end of the vacuum pump, a pressure relief valve installed on the side wall of the reactor, and a discharge mechanism and a liquid injection mechanism provided on the reactor. The discharge mechanism comprises: a first mounting groove, a movable plate, and a mounting hinge. The first mounting groove is provided at a position near the bottom of the side wall of the reactor, the movable plate is movably mounted within the first mounting groove, the mounting hinge is movably mounted between the movable plate and the reactor, the movable plate is movably mounted to the reactor via the mounting hinge, and the movable plate can be flipped with the mounting hinge as a base point. The present invention allows materials to be smoothly removed from the reactor, thereby achieving the effect of rapid discharge.

Description

Technical Field

[0001] The present invention relates to the technical field of PCL foaming equipment, and in particular to a PCL supercritical foaming device and a foaming method. Background Art

[0002] The PCL supercritical foaming device is a special equipment that uses supercritical fluid to physically foam PCL under high pressure and high temperature conditions. This technology can prepare high-performance PCL foam materials with controllable microporous structure without using chemical foaming agents.

[0003] When the existing PCL supercritical foaming device is in use, the PCL will adhere to the inner wall of the reaction device after foaming, making it difficult to unload the material during the unloading round after foaming is completed. This makes the entire unloading process after foaming more troublesome and requires manual auxiliary unloading, which consumes a lot of time. In order to speed up unloading, a release liquid can be applied to the inner wall of the device, but manual application also consumes a lot of time, further resulting in a low rate of the entire processing process and inconvenience in use. Summary of the Invention

[0004] The object of the present invention is to provide a PCL supercritical foaming device and foaming method to solve the problems raised in the above background technology.

[0005] The technical solution of the present invention is: a PCL supercritical foaming device, comprising a reactor, a feed pipe for adding raw materials is installed on the reactor, a bottom plate is provided at the bottom of the reactor, a vacuum pump is installed on one side of the top of the reactor, an air pipe is installed at the input end of the vacuum pump, a pressure relief valve is installed on the side wall of the reactor, and a feed mechanism and a liquid injection mechanism are provided on the reactor;

[0006] The blanking mechanism includes:

[0007] The first mounting groove, the movable plate and the mounting hinge are provided. The first mounting groove is provided at a position near the bottom of the side wall of the reactor. The movable plate is movably installed inside the first mounting groove. The mounting hinge is movably installed between the movable plate and the reactor. The movable plate is movably installed on the reactor through the mounting hinge. The movable plate can be turned over with the mounting hinge as a base point.

[0008] The second mounting groove and the pressing block are arranged in an annular shape on the side wall of the reactor. The second mounting groove is located directly above the first mounting groove. The pressing block is movably installed inside the second mounting groove.

[0009] The piston tube, piston rod and piston block, the piston tube is made of iron, the piston tube is fixedly mounted on the side wall of the pressure block, the piston rod is fixedly mounted on the side wall of the movable plate, one end of the piston rod passes through the side wall of the piston tube and is located inside the piston tube, the piston block is located inside the piston tube, the piston block is fixedly mounted on one end of the piston rod, and a driving mechanism is provided on the reactor.

[0010] Preferably, the injection mechanism includes multiple storage boxes, connecting hoses, one-way pressure valves, check valves, feed ports and spray ports. The storage box is installed on the reactor, and a connecting block is installed between the storage box and the reactor. The connecting hose is a tubular structure with a relatively soft material and can be stretched. The connecting hose is fixedly installed between the piston tube and the storage box. The connecting hose connects the storage box and the interior of the piston tube. The one-way pressure valve is installed on the piston tube near one end of the pressing block, and the check valve is installed on the end of the connecting hose located inside the storage box. The feed port is opened on the side wall of the pressing block, and the feed port connects the interior of the pressing block and the piston tube. The spray port is opened obliquely downward on the two side walls of the pressing block.

[0011] Preferably, the one-way pressure valve creates a one-way channel between the piston tube and the interior of the pressing block, the piston tube can enter the interior of the pressing block, but the pressing block cannot enter the interior of the piston tube, and the check valve creates a one-way channel between the piston tube and the storage box, the storage box can enter the interior of the piston tube, but the piston tube cannot enter the interior of the storage box.

[0012] Preferably, the driving mechanism includes multiple electric push rods, a driving ring, a movable block 1, a transmission block 1, a mounting block, a movable block 2 and a mounting shaft. The multiple electric push rods are all installed on the side wall of the reactor. The driving ring is arranged at a position corresponding to the movable plate on the side wall of the reactor. The mounting groove 3 is opened on the driving ring at a position corresponding to the electric push rod. The movable block 1 is movably installed inside the mounting groove 3. The movable block 1 is fixedly connected to the output end of the electric push rod. The transmission block 1 is fixedly installed on the side wall of the movable plate. The transmission block 1 and the driving ring fit together.

[0013] Preferably, the mounting block is fixedly mounted on the side wall of the reactor, the movable block 2 is fixedly mounted on the electric push rod, the movable block 2 is located inside the mounting block, the mounting shaft is movably mounted inside the mounting block, and the movable block 2 is movably sleeved on the mounting shaft.

[0014] Preferably, a sealing cover is movably installed on the feed pipe through a thread, a blanking plate is fixedly installed below the side wall of the reactor, a driving motor is installed on the blanking plate, a rotating shaft is installed on the output end of the driving motor, and the rotating shaft is fixedly connected to the bottom plate.

[0015] Preferably, the injection mechanism also includes a mounting ring, a spray head, a second spray port, a fourth mounting groove, a second transmission block, a transmission magnetic block and an electromagnetic block. The mounting ring is embedded in the inner wall of the reactor, and the spray head is embedded and movably installed on the side wall of the mounting ring. The spray head is also connected to the interior of the storage box through a connecting hose. The second spray port is opened below the side wall of the spray head, and the second spray port is connected to the interior of the spray head. The fourth mounting groove is opened at a position on the inner wall of the reactor corresponding to the mounting ring, and the fourth mounting groove extends to the interior of the first mounting groove and the mounting ring. The second transmission block is a triangular block. The second transmission block is fixedly installed at the bottom of the spray head. The transmission magnetic block is movably installed in the middle position inside the fourth mounting groove. The electromagnetic block is embedded in the top of the movable plate, and the poles of the transmission magnetic block and the electromagnetic block are the same pole.

[0016] Preferably, a mounting rod is installed on the spray head, the mounting rod passes through the mounting ring and the side wall of the reactor, and a return spring is sleeved on the mounting rod.

[0017] Preferably, a reset groove is provided on one side of the inner portion of the installation groove four, a reset block is movably installed at the lower inner portion of the reset groove, the reset block is fixedly connected to the transmission magnetic block, and a reset spring two is installed between the reset block and the reset groove.

[0018] The present invention also discloses a PCL supercritical foaming method, which is applied to the above-mentioned PCL supercritical foaming device and includes the following steps:

[0019] Step 1: Place the raw materials into the reactor through the feed pipe, then evacuate the interior of the reactor through a vacuum pump and air pipe. Then heat the reactor until the temperature of the raw materials reaches the foaming temperature, and then inject supercritical N2 / CO2 mixed gas. After maintaining the pressure for a certain period of time, quickly release the pressure inside the reactor through the pressure relief valve. Then, the bottom plate can be removed from the bottom of the reactor, and the materials can be discharged from the bottom of the reactor.

[0020] Step 2: When the raw material is foaming inside the reactor, the movable plate is located inside the mounting groove 1 and seals the mounting groove 1, so that the raw material can react normally inside the reactor. When the raw material foaming is completed and needs to be unloaded normally, the driving mechanism can drive the movable plate to flip upward;

[0021] Step 3: When the movable plate is reversed, the piston rod, piston tube and pressing block are driven to turn together. When the movable plate is turned upward, the pressing block is driven to turn toward the inside of the reactor. At this time, the pressing block turns downward and contacts the top of the foamed material.

[0022] Step 4: At the same time, when the movable plate is flipped, the contact area between the formed material and the inner wall of the reactor will become smaller. As the movable plate is flipped, the pressing block will continue to squeeze the material downward, so that the material can fall off smoothly from the inside of the reactor.

[0023] The present invention provides a PCL supercritical foaming device and foaming method through improvements, which have the following improvements and advantages compared with the prior art:

[0024] First, the present invention sets a feeding mechanism. When the raw material foams inside the reactor, the movable plate is located inside the mounting groove one and seals the mounting groove one, so that the raw material can be located inside the reactor for normal reaction. When the raw material foaming is completed and normal feeding is required, the movable plate can be driven to flip upward by the driving mechanism. A piston rod is installed on the movable plate. When the movable plate flips, the piston rod, piston tube and pressure block can be driven to flip together. When the movable plate flips upward, the pressure block will be driven to flip toward the inside of the reactor. At this time, the pressure block flips downward and will contact the top of the foamed material. At the same time, when the movable plate flips, the contact area between the formed material and the inner wall of the reactor will become smaller. As the movable plate flips, the pressure block will continue to squeeze the material downward, so that the material can fall off smoothly from the inside of the reactor, thereby achieving the effect of rapid feeding.

[0025] Secondly, the present invention provides a liquid injection mechanism, so that the material storage box can be filled with demoulding liquid, and the demoulding liquid inside the material storage box can enter the interior of the piston tube through the connecting hose. When the movable plate flips to make the pressing block contact with the material, due to the provision of a one-way pressure valve, when the material is squeezed and discharged through the pressing block, as the downward pressure increases, when the downward pressure is greater than the force of the one-way pressure valve, the one-way pressure valve will be opened, and the piston block will move inside the piston tube, so that the demoulding liquid inside the piston tube will be squeezed by the piston block through the feed port and enter the interior of the pressing block. Then it can be sprayed out through the spray ports on both sides of the pressing block. Since the spray ports are opened obliquely, the demoulding liquid will be sprayed onto the other inner walls of the reactor, and then flow downward to contact with the material, so that the material can be separated from the inner wall of the reactor more quickly, thereby further accelerating the demoulding speed. After the material is separated, the movable plate is reset through the driving mechanism. At this time, the piston block moves inside the piston tube reactor, and suction can be generated inside the piston tube. Under the action of suction, the demoulding liquid inside the storage box will be sucked into the inside of the piston tube, which is convenient for next use.

[0026] Thirdly, the present invention sets a liquid injection mechanism. When the movable plate is reset, the electromagnetic block on the movable plate is energized. At this time, the electromagnetic block will carry magnetic force, and the transmission magnetic block and the pole close to the electromagnetic block are the same pole. Under the action of repulsive force, the transmission magnetic block will move upward. When the transmission magnetic block moves upward, it will contact the inclined surface of the transmission block 2, and then the transmission block 2 will be squeezed by the transmission magnetic block, and then the spray head will move toward the inside of the reactor. At this time, the demoulding liquid inside the spray head will flow out through the spray port 2, and then the demoulding liquid will flow to the inner wall of the movable plate. When the movable plate is flipped over next time, the movable plate can be easily separated from the material, thereby achieving the effect of facilitating the separation of the movable plate and the material, thereby further improving the demoulding speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 Schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a cross-sectional view of the internal structure of the present invention;

[0030] Figure 3 It is a partial structural diagram of the blanking mechanism in the present invention;

[0031] Figure 4 For the present invention Figure 2 Enlarged view of point A in the middle;

[0032] Figure 5 For the present invention Figure 1 Enlarged view of point B in the middle;

[0033] Figure 6 For the present invention Figure 1 Enlarged view of point C in the middle;

[0034] Figure 7 For the present invention Figure 2 Enlarged view of point D in the middle.

[0035] Reference numerals:

[0036] 1. Reactor; 2. Feed pipe; 3. Bottom plate; 4. Vacuum pump; 5. Air pipe; 6. Sealing cover; 7. Mounting slot 1; 8. Movable plate; 9. Mounting hinge; 10. Mounting slot 2; 11. Pressure block; 12. Piston tube; 13. Piston rod; 14. Piston block; 15. Storage box; 16. Connecting hose; 17. One-way pressure valve; 18. Check valve; 19. Feed port; 20. Spray port 1; 21. Connecting block; 22. Pressure relief valve; 23. Electric push rod; 24. Drive Moving ring; 25. Mounting slot three; 26. Movable block one; 27. Transmission block one; 28. Mounting block; 29. Movable block two; 30. Mounting shaft; 31. Blanking plate; 32. Driving motor; 33. Rotating shaft; 34. Mounting ring; 35. Spray head; 36. Spray port two; 37. Mounting slot four; 38. Transmission block two; 39. Transmission magnet; 40. Electromagnetic block; 41. Mounting rod; 42. Reset spring one; 43. Reset slot; 44. Reset block; 45. Reset spring two. DETAILED DESCRIPTION

[0037] The present invention is described in detail below, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] The present invention provides a PCL supercritical foaming device and foaming method through improvement. The technical solution of the present invention is:

[0039] Example 1:

[0040] like Figures 1 to 7 As shown, this embodiment provides a PCL supercritical foaming device, including a reactor 1, a feed pipe 2 for adding raw materials is installed on the reactor 1, the feed pipe 2 is connected to the interior of the reactor 1, a bottom plate 3 is provided at the bottom of the reactor 1, the bottom plate 3 seals the bottom of the reactor 1, a vacuum pump 4 is installed on one side of the top of the reactor 1, an air pipe 5 is installed at the input end of the vacuum pump 4, the air pipe 5 is a tubular structure, the bottom of the air pipe 5 is connected to the interior of the reactor 1, a pressure relief valve 22 is installed on the side wall of the reactor 1, and the feed pipe 22 is connected to the interior of the reactor 1. The raw materials are placed into the interior of the reactor 1 through the pipe 2, and then the interior of the reactor 1 is vacuumed through the vacuum pump 4 and the air pipe 5. The reactor 1 is then heated to make the temperature of the raw materials reach the foaming temperature, and then supercritical N2 / CO2 mixed gas is injected. After maintaining the pressure for a certain period of time, the interior of the reactor 1 is quickly depressurized through the pressure relief valve 22, and then the bottom plate 3 can be removed from the bottom of the reactor 1. At this time, the material can be unloaded from the bottom of the reactor 1. The reactor 1 is provided with a unloading mechanism and a liquid injection mechanism;

[0041] The unloading mechanism includes a plurality of mounting grooves 7, a movable plate 8, a mounting hinge 9, a mounting groove 2 10, a pressure block 11, a piston tube 12, a piston rod 13 and a piston block 14. The mounting groove 7 is a groove of a rectangular structure. A plurality of mounting grooves 7 are evenly distributed and opened near the bottom of the side wall of the reactor 1. The movable plate 8 is a rectangular plate adapted to the mounting groove 7. The movable plate 8 is movably installed in the interior of the mounting groove 7. The mounting hinge 9 is movably installed between the movable plate 8 and the reactor 1. The movable plate 8 is movably installed on the reactor 1 through the mounting hinge 9. The movable plate 8 can be based on the mounting hinge 9. Turn over, the mounting groove 2 10 is a groove of rectangular structure, and multiple mounting grooves 2 10 are distributed in an annular manner and opened on the side wall of the reactor 1. The mounting groove 2 10 is located directly above the mounting groove 1 7. The pressing block 11 is a hollow rectangular block adapted to the mounting groove 2 10. The pressing block 11 is movably installed inside the mounting groove 2 10. The piston tube 12 is an arc-shaped tube, and the piston tube 12 is made of iron. The piston tube 12 is fixedly installed on the side wall of the pressing block 11. The piston rod 13 is an arc-shaped cylindrical rod. The piston rod 13 is fixedly installed on the side wall of the movable plate 8. One end of the piston rod 13 passes through the side wall of the piston tube 12 and is located at the piston tube 1 2, the piston block 14 is located inside the piston tube 12, and the piston block 14 is fixedly installed on one end of the piston rod 13. The reactor 1 is provided with a driving mechanism, which can make the movable plate 8 flip over on the reactor 1 with the installation hinge 9 as the base point. Through the setting of the unloading mechanism, when the raw material is foamed inside the reactor 1, the movable plate 8 is located inside the installation groove 7 and seals the installation groove 7, so that the raw material can be located inside the reactor 1 for normal reaction. When the raw material foaming is completed and normal unloading is required, the movable plate 8 can be driven by the driving mechanism to flip upward, and the movable plate 8 is installed on the movable plate 8. It is equipped with a piston rod 13. When the movable plate 8 is flipped, the piston rod 13, the piston tube 12 and the pressure block 11 can be driven to flip together. When the movable plate 8 is flipped upward, the pressure block 11 will be driven to flip toward the inside of the reactor 1. At this time, the pressure block 11 flips downward and contacts the top of the foamed material. At the same time, when the movable plate 8 is flipped, the contact area between the molded material and the inner wall of the reactor 1 will become smaller. As the movable plate 8 is flipped, the pressure block 11 will continue to squeeze the material downward, so that the material can fall off smoothly from the inside of the reactor 1, thereby achieving the effect of rapid material discharge.

[0042] The injection mechanism includes a plurality of storage boxes 15, a connecting hose 16, a one-way pressure valve 17, a check valve 18, a feed port 19 and a spray port 20. The storage box 15 is a hollow structure. The storage box 15 is installed on the reactor 1. A connecting block 21 is installed between the storage box 15 and the reactor 1. The connecting hose 16 is a tubular structure with a relatively soft material and can be stretched. The connecting hose 16 is fixedly installed between the piston tube 12 and the storage box 15. The connecting hose 16 communicates with the interior of the storage box 15 and the piston tube 12. The one-way pressure valve 17 is installed on the piston tube 12 at one end near the pressing block 11. The check valve 18 is installed At one end of the connecting hose 16 located inside the storage box 15, a feed port 19 is provided on the side wall of the pressing block 11, the feed port 19 communicates with the interior of the pressing block 11 and the piston tube 12, a spray port 20 is provided obliquely downward on both side walls of the pressing block 11, a one-way pressure valve 17 makes a one-way passage between the piston tube 12 and the interior of the pressing block 11, the piston tube 12 can enter the interior of the pressing block 11, and the pressing block 11 cannot enter the interior of the piston tube 12, a check valve 18 makes a one-way passage between the piston tube 12 and the storage box 15, the storage box 15 can enter the interior of the piston tube 12, and the piston tube 12 cannot enter the storage box 1 5, the storage box 15 can be filled with demoulding liquid through the setting of the liquid injection mechanism, and the demoulding liquid inside the storage box 15 can enter the interior of the piston tube 12 through the connecting hose 16. When the movable plate 8 is flipped to make the pressing block 11 contact with the material, due to the provision of a one-way pressure valve 17, when the material is squeezed and discharged through the pressing block 11, as the downward pressure increases, when the downward pressure is greater than the force of the one-way pressure valve 17, the one-way pressure valve 17 will be opened, and the demoulding liquid inside the piston tube 12 will be squeezed by the piston block 14 through the feed port 19 into the interior of the pressing block 11, and then can be discharged through the pressure The ejection port 20 on both sides of the block 11 is sprayed out. Since the ejection port 20 is opened obliquely, the demoulding liquid will be sprayed onto the other inner walls of the reactor 1, and then will flow downward to contact with the material, so that the material can be separated from the inner wall of the reactor 1 more quickly, thereby further accelerating the demoulding speed. After the material is separated, the movable plate 8 is reset through the driving mechanism. At this time, the piston block 14 moves inside the piston tube 12 reactor 1, and suction can be generated inside the piston tube 12. Under the action of the suction, the demoulding liquid inside the storage box 15 will be sucked into the inside of the piston tube 12, which is convenient for next use.

[0043] The driving mechanism includes multiple electric push rods 23, a driving ring 24, a movable block 1 26, a transmission block 1 27, a mounting block 28, a movable block 29 and a mounting shaft 30. Multiple electric push rods 23 are installed on the side wall of the reactor 1. The driving ring 24 is a circular ring structure. The driving ring 24 is arranged on the side wall of the reactor 1 at a position corresponding to the movable plate 8. The mounting groove 3 25 is a rectangular groove. The mounting groove 3 25 is opened on the driving ring 24 at a position corresponding to the electric push rod 23. The movable block 1 26 is a rectangular block. The movable block 1 26 is movably mounted inside the mounting groove 3 25. The movable block 1 26 is fixedly connected to the output end of the electric push rod 23. The transmission block 1 27 is a rectangular block. The transmission block 1 27 is fixedly mounted on the side wall of the movable plate 8. The transmission block 1 27 and the driving ring 24 fit together. The mounting block 28 is a block with a hollow structure. The mounting block 28 is fixedly mounted on the side wall of the reactor 1. The movable block 29 is fixedly mounted on the electric push rod 23. The movable block 29 is located inside the mounting block 28. The mounting shaft 30 is a cylindrical structure. The mounting shaft 30 is movably mounted inside the mounting block 28. The movable block 29 is movably sleeved on the mounting shaft 30. The electric push rod 23 is movably mounted on the reactor 1 through the mounting block 28, the movable block 29 and the mounting shaft 30. When unloading is required, the electric push rod 23 is started. The electric push rod 23 drives the movable block 1 26 to move upward, and the movable block 1 26 can then drive the drive ring 24 to move upward. When the drive ring 24 moves upward, it will squeeze the transmission block 1 27. After the transmission block 1 27 is squeezed, it can drive the movable plate 8 to flip upward, so that the unloading operation can be performed.

[0044] A sealing cover 6 is movably installed on the feed pipe 2 through a thread, and the sealing cover 6 can seal the feed pipe 2. A blanking plate 31 is fixedly installed under the side wall of the reactor 1, and a driving motor 32 is installed on the blanking plate 31. A rotating shaft 33 is installed on the output end of the driving motor 32. The rotating shaft 33 is fixedly connected to the bottom plate 3. When unloading is required, the driving motor 32 is started, and the driving motor 32 drives the rotating shaft 33 to rotate, and the rotating shaft 33 then drives the bottom plate 3 to move. At this time, the bottom plate 3 will be separated from the bottom of the reactor 1, and unloading can be carried out.

[0045] The injection mechanism also includes a mounting ring 34, a spray head 35, a second spray port 36, a fourth mounting groove 37, a second transmission block 38, a transmission magnetic block 39 and an electromagnetic block 40. The mounting ring 34 is a circular ring structure and is embedded in the inner wall of the reactor 1. The spray head 35 is a hollow rectangular block and is embedded and movably installed on the side wall of the mounting ring 34. The spray head 35 is also connected to the inside of the storage box 15 through the connecting hose 16. The second spray port 36 is a rectangular structure. The second injection port 36 is provided below the side wall of the injection head 35, and the second injection port 36 is connected to the interior of the injection head 35. The mounting groove 4 37 is a rectangular groove. The mounting groove 4 37 is provided on the inner wall of the reactor 1 at a position corresponding to the mounting ring 34. The mounting groove 4 37 extends to the interior of the mounting groove 1 7 and the mounting ring 34. The transmission block 2 38 is a triangular block. The transmission block 2 38 is fixedly mounted at the bottom of the injection head 35. The transmission magnetic block 39 is a rectangular block. The transmission magnetic block 39 is movably mounted. In the middle position inside the mounting groove four 37, the electromagnetic block 40 is embedded and installed on the top of the movable plate 8, and the transmission magnetic block 39 is close to the pole of the electromagnetic block 40 with the same pole. Through the setting of the liquid injection mechanism, when the movable plate 8 is reset, the electromagnetic block 40 on the movable plate 8 is energized. At this time, the electromagnetic block 40 will have a magnetic force, and the transmission magnetic block 39 is close to the pole of the electromagnetic block 40 with the same pole. Under the action of the repulsive force, the transmission magnetic block 39 will move upward. When the transmission magnetic block 39 moves upward, it will contact the inclined surface of the transmission block 2 38, and then the transmission block 2 38 will be squeezed by the transmission magnetic block 39, and then the spray head 35 will move toward the inside of the reactor 1. At this time, the demoulding liquid inside the spray head 35 will flow out through the spray port 2 36, and then the demoulding liquid will flow to the inner wall of the movable plate 8. When the movable plate 8 is flipped over next time, the movable plate 8 can be easily separated from the material, thereby achieving the effect of facilitating the separation of the movable plate 8 from the material, thereby further improving the demoulding speed.

[0046] A mounting rod 41 is installed on the spray head 35. The mounting rod 41 is a cylindrical structure. The mounting rod 41 passes through the mounting ring 34 and the side wall of the reactor 1. A return spring 42 is sleeved on the mounting rod 41. When the spray head 35 moves, the return spring 42 is squeezed. When foaming is performed, the electromagnetic block 40 can be powered off. At this time, the spray head 35 will be reset under the action of the return spring 42. A return groove 43 is provided on one side of the interior of the mounting groove 47. The return groove 43 is a rectangular groove. A return block 44 is movably installed at the lower part of the interior of the return groove 43. The return block 44 is fixedly connected to the transmission magnetic block 39. A return spring 2 45 is installed between the return block 44 and the return groove 43. When the transmission magnetic block 39 moves, the return spring 2 45 is squeezed. When the electromagnetic block 40 is powered off, the transmission magnetic block 39 will be reset under the action of the return spring 2 45.

[0047] Example 2:

[0048] This embodiment discloses a PCL supercritical foaming method, which is applied to the above-mentioned PCL supercritical foaming device, including the following steps:

[0049] Step 1: The raw materials are placed into the interior of the reactor 1 through the feed pipe 2, and then the interior of the reactor 1 is vacuumed through the vacuum pump 4 and the air pipe 5. The reactor 1 is then heated to make the temperature of the raw materials reach the foaming temperature, and then a supercritical N2 / CO2 mixed gas is injected. After maintaining the pressure for a certain period of time, the interior of the reactor 1 is quickly depressurized through the pressure relief valve 22, and then the bottom plate 3 can be removed from the bottom of the reactor 1. At this time, the material can be discharged from the bottom of the reactor 1;

[0050] Step 2: When the raw material is foaming inside the reactor 1, the movable plate 8 is located inside the mounting groove 1 7 and seals the mounting groove 1 7, so that the raw material can react normally inside the reactor 1. When the raw material foaming is completed and needs to be discharged normally, the driving mechanism can drive the movable plate 8 to flip upward;

[0051] Step 3: When the movable plate 8 is reversed, the piston rod 13, the piston tube 12 and the pressing block 11 are driven to turn together. When the movable plate 8 is turned upward, the pressing block 11 is driven to turn toward the inside of the reactor 1. At this time, the pressing block 11 turns downward and contacts the top of the foamed material.

[0052] Step 4: At the same time, when the movable plate 8 is flipped, the contact area between the formed material and the inner wall of the reactor 1 will become smaller. As the movable plate 8 is flipped, the pressing block 11 will continue to squeeze the material downward, so that the material can fall off smoothly from the inside of the reactor 1.

[0053] The above description is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A PCL supercritical foaming device, comprising a reactor (1), a feed pipe (2) for adding raw materials installed on the reactor (1), and a bottom plate (3) provided at the bottom of the reactor (1), characterized in that: A vacuum pump (4) is installed on one side of the top of the reactor (1), an air pipe (5) is installed on the input end of the vacuum pump (4), a pressure relief valve (22) is installed on the side wall of the reactor (1), and a material discharge mechanism and a liquid injection mechanism are provided on the reactor (1); The blanking mechanism includes: A mounting groove (7), a movable plate (8) and a mounting hinge (9), wherein the mounting groove (7) is provided at a position near the bottom of the side wall of the reactor (1), the movable plate (8) is movably mounted inside the mounting groove (7), the mounting hinge (9) is movably mounted between the movable plate (8) and the reactor (1), the movable plate (8) is movably mounted on the reactor (1) via the mounting hinge (9), and the movable plate (8) can be turned over with the mounting hinge (9) as a base point; The second mounting groove (10) and the pressing block (11) are arranged in an annular shape on the side wall of the reactor (1). The second mounting groove (10) is located directly above the first mounting groove (7). The pressing block (11) is movably installed inside the second mounting groove (10); The piston tube (12), the piston rod (13) and the piston block (14) are made of iron. The piston tube (12) is fixedly mounted on the side wall of the pressure block (11). The piston rod (13) is fixedly mounted on the side wall of the movable plate (8). One end of the piston rod (13) passes through the side wall of the piston tube (12) and is located inside the piston tube (12). The piston block (14) is located inside the piston tube (12). The piston block (14) is fixedly mounted on one end of the piston rod (13). A driving mechanism is provided on the reactor (1).

2. A PCL supercritical foaming device according to claim 1, characterized in that: The injection mechanism includes a plurality of storage boxes (15), a connecting hose (16), a one-way pressure valve (17), a check valve (18), a feed port (19) and a spray port (20). The storage box (15) is installed on the reactor (1). A connecting block (21) is installed between the storage box (15) and the reactor (1). The connecting hose (16) is a tubular structure with a relatively soft material and can be stretched. The connecting hose (16) is fixedly installed between the piston tube (12) and the storage box (15). The hose (16) is connected to the interior of the material storage box (15) and the piston tube (12), the one-way pressure valve (17) is installed on the piston tube (12) at one end close to the pressing block (11), the check valve (18) is installed on the connecting hose (16) at one end inside the material storage box (15), the feed port (19) is opened on the side wall of the pressing block (11), the feed port (19) is connected to the interior of the pressing block (11) and the piston tube (12), and the spray port (20) is opened obliquely downward on the two side walls of the pressing block (11).

3. A PCL supercritical foaming device according to claim 2, characterized in that: The one-way pressure valve (17) forms a one-way passage between the piston tube (12) and the interior of the pressing block (11), so that the piston tube (12) can enter the interior of the pressing block (11), while the pressing block (11) cannot enter the interior of the piston tube (12). The check valve (18) forms a one-way passage between the piston tube (12) and the storage box (15), so that the storage box (15) can enter the interior of the piston tube (12), while the piston tube (12) cannot enter the interior of the storage box (15).

4. A PCL supercritical foaming device according to claim 1, characterized in that: The driving mechanism includes a plurality of electric push rods (23), a driving ring (24), a movable block 1 (26), a transmission block 1 (27), a mounting block (28), a movable block 2 (29) and a mounting shaft (30). The plurality of electric push rods (23) are mounted on the side wall of the reactor (1). The driving ring (24) is arranged at a position corresponding to the movable plate (8) on the side wall of the reactor (1). The mounting groove 3 (25) is opened on the driving ring (24) at a position corresponding to the electric push rod (23). The movable block 1 (26) is movably mounted inside the mounting groove 3 (25). The movable block 1 (26) is fixedly connected to the output end of the electric push rod (23). The transmission block 1 (27) is fixedly mounted on the side wall of the movable plate (8). The transmission block 1 (27) and the driving ring (24) are in contact with each other.

5. A PCL supercritical foaming device according to claim 4, characterized in that: The mounting block (28) is fixedly mounted on the side wall of the reactor (1), the movable block (29) is fixedly mounted on the electric push rod (23), the movable block (29) is located inside the mounting block (28), the mounting shaft (30) is movably mounted inside the mounting block (28), and the movable block (29) is movably sleeved on the mounting shaft (30).

6. A PCL supercritical foaming device according to claim 1, characterized in that: A sealing cover (6) is movably mounted on the feed pipe (2) through a thread, a blanking plate (31) is fixedly mounted below the side wall of the reactor (1), a driving motor (32) is mounted on the blanking plate (31), a rotating shaft (33) is mounted on the output end of the driving motor (32), and the rotating shaft (33) is fixedly connected to the bottom plate (3).

7. The PCL supercritical foaming device according to claim 1, characterized in that: The injection mechanism also includes a mounting ring (34), a spray head (35), a second spray port (36), a fourth mounting groove (37), a second transmission block (38), a transmission magnetic block (39) and an electromagnetic block (40). The mounting ring (34) is mounted on the inner wall of the reactor (1), and the spray head (35) is mounted on the side wall of the mounting ring (34). The spray head (35) is also connected to the inside of the storage box (15) through a connecting hose (16). The second spray port (36) is opened below the side wall of the spray head (35). The second spray port (36) is connected to the spray head (35). Inside the material head (35), the mounting groove four (37) is opened on the inner wall of the reactor (1) at a position corresponding to the mounting ring (34), and the mounting groove four (37) extends to the inside of the mounting groove one (7) and the mounting ring (34). The transmission block two (38) is a triangular block, and the transmission block two (38) is fixedly installed at the bottom of the spray head (35). The transmission magnetic block (39) is movably installed in the middle position inside the mounting groove four (37). The electromagnetic block (40) is embedded and installed on the top of the movable plate (8). The transmission magnetic block (39) and the electromagnetic block (40) have the same pole.

8. A PCL supercritical foaming device according to claim 7, characterized in that: The spray head (35) is provided with a mounting rod (41), which passes through the mounting ring (34) and the side wall of the reactor (1), and a return spring (42) is sleeved on the mounting rod (41).

9. The PCL supercritical foaming device according to claim 7, characterized in that: A reset groove (43) is provided on one side of the interior of the mounting groove (37), a reset block (44) is movably installed below the interior of the reset groove (43), the reset block (44) is fixedly connected to the transmission magnetic block (39), and a reset spring (45) is installed between the reset block (44) and the reset groove (43).

10. A PCL supercritical foaming method, applied to a PCL supercritical foaming device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: The raw materials are placed into the interior of the reactor (1) through the feed pipe (2), and then the interior of the reactor (1) is vacuumed through the vacuum pump (4) and the air pipe (5). The reactor (1) is then heated so that the temperature of the raw materials reaches the foaming temperature, and then a supercritical N2 / CO2 mixed gas is injected. After maintaining the pressure for a certain period of time, the interior of the reactor (1) is quickly depressurized through the pressure relief valve (22), and then the bottom plate (3) can be removed from the bottom of the reactor (1), and the material can be discharged from the bottom of the reactor (1); Step 2: When the raw material is foaming inside the reactor (1), the movable plate (8) is located inside the mounting groove (7) and seals the mounting groove (7), so that the raw material can react normally inside the reactor (1). When the raw material foaming is completed and needs to be discharged normally, the movable plate (8) can be driven by the driving mechanism to flip upward; Step 3: When the movable plate (8) is reversed, the piston rod (13), the piston tube (12) and the pressing block (11) are driven to turn together. When the movable plate (8) turns upward, the pressing block (11) is driven to turn toward the inside of the reactor (1). At this time, the pressing block (11) turns downward and contacts the top of the foamed material. Step 4: When the movable plate (8) is turned over, the contact area between the formed material and the inner wall of the reactor (1) will become smaller. As the movable plate (8) is turned over, the pressing block (11) will continue to press the material downward, so that the material can fall off smoothly from the inside of the reactor (1).

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