DCPD continuous reaction extrusion molding device and process for engineering machinery

Abstract

The application discloses a DCPD continuous reaction extrusion molding device and process for engineering machinery, belongs to the technical field of extrusion molding devices, and comprises a die, a base for supporting the die below the die, a core rod fixed at a middle position in the die, and a central cavity in the core rod. The application sets a transmission assembly composed of a first driven gear, a cylinder, a first motor, a driving shaft, a first main gear, a second main gear and a second driven gear between the transmission shaft at the end of the pump body and the end of the first screw rod, so that the supplement of the raw material in the die can be carried out at the same time when the cylindrical metal piece is horizontally pulled out and the pipe after molding is taken out, the pressure in the die is maintained, the intelligent system does not need to be controlled for monitoring, a pure mechanical transmission mode is adopted, the taking out of the molded pipe and the pressure maintaining of the raw material are ensured, the practicality is higher, and the molding quality is ensured.

Description

Technical Field

[0001] This invention relates to a molding apparatus, and more particularly to a DCPD continuous reactive extrusion molding apparatus for engineering machinery. This invention also relates to a molding process, and more particularly to the molding process of the DCPD continuous reactive extrusion molding apparatus for engineering machinery, belonging to the technical field of extrusion molding apparatus. Background Technology

[0002] In the prior art, such as the invention with publication number 202011596764.3, a continuous extrusion device and process for pipes used in the polymerization reaction of dicyclopentadiene (DCPD) are disclosed. Due to the extremely low viscosity of DCPD raw material, which is almost close to that of water, it is not easy to maintain its shape. Moreover, the polymerization process involves a chemical reaction and releases a large amount of heat. If the temperature is not well controlled, the product will have defects or even be scrapped. In order to solve the above-mentioned technical difficulties in the extrusion process, a continuous extrusion device was designed. A metal cylindrical ring and its control device were specially designed to assist the liquid DCPD in forming back pressure and maintaining the shape of the pipe. Based on the reaction injection molding principle, a three-stage temperature control was designed. The first stage heat insulation medium loop separates the reaction heat and external heat source from the front of the mold to prevent the DCPD from solidifying prematurely and clogging the die head. The heating medium loop and the cooling medium loop trigger the reaction and dissipate heat, respectively. By controlling the temperature to a stable and constant temperature, the quality of pipe forming is guaranteed. At the same time, the control curve law of traction force is proposed to ensure the continuity and density of the liquid phase, solid-liquid phase and solid phase of DCPD material, and to ensure the quality of pipe forming and the continuity of the forming process.

[0003] The above-mentioned applications still have shortcomings:

[0004] 1. During the process of pulling out the pipe, in order to ensure the quality of pipe forming, it is necessary to stably control the pressure of the raw material during forming. The pulling and pressure holding processes need to be controlled separately by the controller, and different control systems are required for monitoring. This makes it inconvenient to control the pulling of the pipe and the pressure holding during the forming of the raw material. In addition, after the pipe is pulled out, the metal cylindrical ring is an integral structure and is fixed inside the pipe, making it inconvenient to separate from the pipe.

[0005] 2. After the pipe is pulled out, if the pipe is long and lacks support at the bottom, the pipe will deform downwards. The unformed end will be affected by the traction of the pipe, which will affect the smooth transport of the pipe and cause pressure fluctuations during the forming of the raw material, thus affecting the forming effect.

[0006] To address these issues, a DCPD (Continuous Reactive Extrusion) molding device and process for engineering machinery were designed. Summary of the Invention

[0007] The main objective of this invention is to provide a DCPD continuous reactive extrusion molding apparatus and process for engineering machinery. By installing a transmission assembly consisting of a first driven gear, a cylinder, a first motor, a drive shaft, a first main gear, a second main gear, and a second driven gear between the drive shaft at the pump body end and the end of the first screw, a simultaneous replenishment of material inside the die and pressure maintenance of the die can be achieved during the horizontal pulling out of the cylindrical metal part and the removal of the formed tube. This eliminates the need for a control system to monitor the process, employing a purely mechanical transmission method. This ensures both the removal of the formed tube and the maintenance of material pressure, resulting in higher practicality and guaranteed molding quality. The first and second arc-shaped plates are also integrated into the assembly. The cylindrical metal part is formed, and a reset mechanism is set between the ends of the first arc plate. The second arc plate can be pulled out from between the first arc plate, so that after the formed tube is taken out using the cylindrical metal part, the cylindrical metal part can be quickly disassembled, and the cylindrical metal part can be separated from the tube, making disassembly more convenient. A lifting mechanism consisting of a rectangular frame plate, a limiting groove, a universal wheel, a cross bar, a cross telescopic bar, and a column is set at one end of the die near the end plate. The column is fixed on the base, and the rectangular frame plate at the end away from the column is fixed on the end plate. When the cylindrical metal part is controlled to pull out the formed tube, the rectangular frame plate can support the tube, ensuring horizontal conveying of the tube and making the conveying more stable.

[0008] The objective of this invention can be achieved by adopting the following technical solution:

[0009] A DCPD continuous reaction extrusion molding device for engineering machinery includes a die, a base supporting the die below it, a mandrel fixed in the middle of the die's interior, a central cavity inside the mandrel, and a heat insulation medium loop, a heating medium loop, and a cooling medium loop arranged sequentially along the length of the die outside the die. A cylindrical metal part is slidably mounted on one end of the die, and a lifting mechanism is provided below the cylindrical metal part. An end plate is vertically mounted on the end of the cylindrical metal part away from the die. An internal helical tube is arranged on the top of the end plate near the die and parallel to the length of the die. A first screw is installed on the internal thread of the internal helical tube. A mixing chamber is provided at the top of the die away from the cylindrical metal part. A pump body is located below the mixing chamber. The input end of the pump body is connected to the interior of the mixing chamber, and the output end of the pump body is connected to the interior of the die. A protective shell is provided on the outside of the pump body. The end of the first screw is rotatably connected to the protective shell, and a transmission assembly is provided between the end of the first screw and the drive shaft of the pump body.

[0010] Preferably, the transmission assembly includes a first driven gear, a cylinder, a first motor, a drive shaft, a first main gear, a second main gear, and a first arc-shaped plate. The first driven gear is mounted on the drive shaft of the pump body. The cylinder is horizontally mounted on the die. The first motor is mounted on the output end of the cylinder. The drive shaft is horizontally mounted on the output end of the first motor. A first main gear that mates with the first driven gear is mounted on one end of the drive shaft. A second main gear is mounted on the end of the drive shaft away from the first motor. The second driven gear is fixedly mounted on the end of the first screw. The first main gear and the second main gear are the same size, and the distance between the first main gear and the second main gear is the same as the horizontal distance between the first driven gear and the second driven gear. The first driven gear and the second driven gear have the same thickness, and the thickness of the first driven gear is twice the thickness of the first main gear.

[0011] Preferably, the housing has a lubrication groove inside, and the first driven gear, the first main gear, the drive shaft and the second driven gear are all located inside the lubrication groove.

[0012] Preferably, the cylindrical metal part includes a first arc plate, a second arc plate, and a reset mechanism. The first arc plate is symmetrically attached to the inner side of the end plate. The outer side of the first arc plate away from the end plate has an arc groove along the circumference. The end plate is provided with a reset mechanism on the side of the end plate close to the first arc plate and located between the two sets of first arc plates. A second arc plate is provided between the sides of the two sets of first arc plates. The end of the second arc plate away from the end plate is flush with the end face of the first arc plate. The end of the second arc plate passes through the end plate and is slidably connected between the end plates. The end of the second arc plate away from the first arc plate is provided with a withdrawal mechanism.

[0013] Preferably, the reset mechanism includes a sleeve, a tension spring, and a slide rod. The sleeve is vertically fixed on the side of the end plate. Both ends of the sleeve are provided with tension springs, and slide rods are fixed between the ends of the tension springs and the inner side of the first arc-shaped plate.

[0014] Preferably, the extraction mechanism includes a mounting plate, a collar, a second motor, a second screw, and a threaded hole. The mounting plate is fixed to the ends of two sets of second arc-shaped plates. The collar is sleeved on the inner spiral tube and slides along the length of the inner spiral tube. The bottom of the collar is equipped with a second motor. The output end of the second motor is equipped with a second screw parallel to the inner spiral tube. The second screw passes through the end plate and is rotatably connected to the mounting plate. The end plate is provided with a threaded hole that mates with the second screw.

[0015] Preferably, the inner side of the collar is uniformly fitted with balls, and the balls are in contact with the outer side of the internal threaded tube.

[0016] Preferably, the lifting mechanism includes a rectangular frame plate, a limiting groove, casters, a crossbar, a cross telescopic bar, and a column. The rectangular frame plate is vertically installed on the top of the base, and the rectangular frame plates are parallel to each other. The top of each rectangular frame plate has a limiting groove, and the bottom of each rectangular frame plate is equipped with a caster. A crossbar is installed between the two sides of the inner side of the rectangular frame plate. A cross telescopic bar is set between adjacent rectangular frame plates, and the crossbar is fixed to the limiting pin at the intersection of the cross telescopic bars. The column is fixed to the top of the base, and the inner side of the column is connected to one end of the cross telescopic bar. The inner side of the end plate is fixedly connected to the rectangular frame plate at the end away from the central cavity.

[0017] Preferably, a third motor is installed on the top of the mixing chamber, the output end of the third motor extends into the interior of the mixing chamber, and a stirring shaft is installed on the output end of the third motor.

[0018] This invention also provides a molding process for a DCPD continuous reactive extrusion molding apparatus for engineering machinery, comprising the following steps:

[0019] Steps: The raw materials first enter the pump body for mixing, and then the pump body is rotated independently using the transmission component to inject the mixed raw materials into the die. After the injection is completed, the die is kept under the set pressure.

[0020] Steps: A temperature-carrying fluid medium is circulated inside the central cavity of the mandrel, a heat-insulating medium is circulated inside the heat-insulating medium loop, a heating medium is circulated inside the heating medium loop, and a cooling medium is circulated inside the cooling medium loop to ensure the continuous reaction of the raw material and to form it inside the die.

[0021] Steps: Since the arc-shaped groove at the end of the cylindrical metal part is filled with raw material, the end of the pipe is connected to the cylindrical metal part after the raw material cools and forms. At this time, the transmission component controls the rotation of the first screw, which in turn drives the cylindrical metal part to pull the formed pipe out horizontally. While the cylindrical metal part moves horizontally, the transmission component controls the rotation of the pump body to automatically replenish the raw material and ensure that the die is under constant pressure.

[0022] Steps: After the cooled and formed pipe is pulled out from inside the mold, the bottom of the pipe is supported by the lifting mechanism. The pipe itself will not deform due to gravity. After the pipe is transported horizontally to a certain length, it is cut using a cutting device.

[0023] Steps: After the end of the pipe near the die is cut off, the cylindrical metal part is separated from the end of the pipe, and the extrusion molding of the single pipe is completed. Then, the rotation of the first screw is controlled by the transmission component to reset the cylindrical metal part and reinsert it into the die for further processing of the pipe.

[0024] The beneficial effects of this invention are as follows:

[0025] The DCPD continuous reactive extrusion molding device and process for engineering machinery provided by the present invention, by setting a transmission assembly consisting of a first driven gear, a cylinder, a first motor, a drive shaft, a first main gear, a second main gear, and a second driven gear between the transmission shaft at the end of the pump body and the end of the first screw, enables the simultaneous replenishment of raw material inside the die and pressure maintenance inside the die when horizontally pulling out the cylindrical metal part and controlling the removal of the formed tube. This eliminates the need for monitoring by an intelligent control system and adopts a purely mechanical transmission method, ensuring the removal of the formed tube and the pressure maintenance of the raw material, resulting in higher practicality and guaranteed molding quality.

[0026] The cylindrical metal part is composed of a first arc plate and a second arc plate, and a reset mechanism is provided between the ends of the first arc plate. The second arc plate can be pulled out from between the first arc plates, so that after the formed tube is taken out using the cylindrical metal part, the cylindrical metal part can be quickly disassembled, thereby separating the cylindrical metal part from the tube, making disassembly more convenient.

[0027] By setting a lifting mechanism consisting of a rectangular frame plate, a limiting groove, a caster wheel, a crossbar, a cross telescopic bar, and a column at one end of the die near the end plate, with the column fixed on the base and the rectangular frame plate at the other end fixed on the end plate, the rectangular frame plate can support the tube when the cylindrical metal part is pulled out, ensuring horizontal and stable conveying of the tube. Attached Figure Description

[0028] Figure 1 This is a front sectional view of a preferred embodiment of the DCPD continuous reactive extrusion molding apparatus and process for engineering machinery of the present invention;

[0029] Figure 2 This is a structural diagram of the transmission component of a preferred embodiment of the DCPD continuous reactive extrusion molding device and process for engineering machinery of the present invention;

[0030] Figure 3 This is a partial cross-sectional view of a metal cylindrical ring, representing a preferred embodiment of the DCPD continuous reactive extrusion molding apparatus and process for engineering machinery according to the present invention.

[0031] Figure 4 This is a front view of a metal cylindrical ring, representing a preferred embodiment of the DCPD continuous reactive extrusion molding apparatus and process for engineering machinery according to the present invention.

[0032] Figure 5 This is a preferred embodiment of the DCPD continuous reactive extrusion molding apparatus and process for engineering machinery of the present invention. Figure 3 Enlarged view of point A in the middle;

[0033] Figure 6This is a diagram of the lifting mechanism of a preferred embodiment of the DCPD continuous reactive extrusion molding device and process for engineering machinery of the present invention;

[0034] Figure 7 This is a side view of a rectangular frame plate of a preferred embodiment of the DCPD continuous reactive extrusion molding apparatus and process for engineering machinery of the present invention;

[0035] Figure 8 This is an internal view of the mixing chamber of a preferred embodiment of the DCPD continuous reactive extrusion molding apparatus and process for engineering machinery of the present invention.

[0036] In the diagram: 1. Base; 2. Die; 3. Mandrel; 4. Central cavity; 5. Insulation medium loop; 6. Heating medium loop; 7. Cooling medium loop; 8. Cylindrical metal part; 9. End plate; 10. Internal helical tube; 11. First screw; 12. Mixing chamber; 13. Pump body; 14. Transmission assembly; 15. Protective shell; 16. Lifting mechanism; 17. First driven gear; 18. Cylinder; 19. First motor; 20. Drive shaft; 21. First main gear; 22. Second main gear; 23. Second driven gear; 24. First arc plate; 25. Second arc plate; 26. Reset mechanism; 27. Sleeve; 28. Tension spring; 29. ​​Slide rod; 30. Mounting plate; 31. Collar; 32. Second motor; 33. Second screw; 34. Threaded hole; 35. Rectangular frame plate; 36. Limiting groove; 37. Caster wheel; 38. Crossbar; 39. Cross telescopic rod; 40. Column; 41. Third motor; 42. Stirring shaft. Detailed Implementation

[0037] To enable those skilled in the art to more clearly understand the technical solution of the present invention, the present invention will be further described in detail below with reference to embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0038] like Figures 1-8As shown, this embodiment provides a DCPD continuous reactive extrusion molding apparatus for engineering machinery, including a die 2, a base 1 located below the die 2 to support it, a mandrel 3 fixed at the middle position inside the die 2, a central cavity 4 located inside the mandrel 3, a heat insulation medium loop 5, a heating medium loop 6, and a cooling medium loop 7 arranged sequentially along the length of the die 2 on the outside of the die 2, a cylindrical metal part 8 slidably disposed at one end of the die 2, a lifting mechanism 16 provided below the cylindrical metal part 8, and an end plate 9 vertically disposed at the end of the cylindrical metal part 8 away from the die 2. An internal threaded tube 10 is provided on the top of the end plate 9 near the die 2 and parallel to the length direction of the die 2. A first screw 11 is installed on the internal thread of the internal threaded tube 10. A mixing chamber 12 is provided at the top of the die 2 away from the cylindrical metal part 8. A pump body 13 is provided below the mixing chamber 12. The input end of the pump body 13 is connected to the interior of the mixing chamber 12, and the output end of the pump body 13 is connected to the interior of the die 2. A protective shell 15 is provided on the outside of the pump body 13. The end of the first screw 11 is rotatably connected to the protective shell 15. A transmission assembly 14 is provided between the end of the first screw 11 and the transmission shaft of the pump body 13.

[0039] By setting a transmission assembly 14 consisting of a first driven gear 17, a cylinder 18, a first motor 19, a drive shaft 20, a first main gear 21, a second main gear 22, and a second driven gear 23 between the drive shaft at the end of the pump body 13 and the end of the first screw 11, the cylindrical metal part 8 can be horizontally pulled out and the tube after forming can be removed simultaneously. This allows for the replenishment of raw material inside the die 2 and pressure maintenance inside the die 2. No intelligent system monitoring is required; the purely mechanical transmission method ensures the removal of the formed tube and the maintenance of raw material pressure, resulting in higher practicality and guaranteed forming quality. The cylindrical metal part 8 is composed of a first arc plate 24 and a second arc plate 25, with the ends of the first arc plate 24... The reset mechanism 26, and the second arc plate 25 can be pulled out from between the first arc plate 24, so that after the cylindrical metal part 8 is removed after forming, the cylindrical metal part 8 can be quickly disassembled, and the cylindrical metal part 8 can be separated from the pipe, making disassembly more convenient. By setting a lifting mechanism 16 consisting of a rectangular frame plate 35, a limiting groove 36, a universal wheel 37, a cross bar 38, a cross telescopic bar 39, and a column 40 at one end of the die 2 near the end plate 9, the column 40 is fixed on the base 1, and the rectangular frame plate 35 at the end away from the column 40 is fixed on the end plate 9, so that when the cylindrical metal part 8 drives the formed pipe to be pulled out, the rectangular frame plate 35 can support the pipe, ensuring that the pipe is transported horizontally and the transport is more stable.

[0040] In this embodiment, the transmission assembly 14 includes a first driven gear 17, a cylinder 18, a first motor 19, a drive shaft 20, a first main gear 21, a second main gear 22, and a first arc-shaped plate 24. The first driven gear 17 is mounted on the drive shaft of the pump body 13. The cylinder 18 is horizontally mounted on the die 2. The first motor 19 is mounted on the output end of the cylinder 18. The drive shaft 20 is horizontally mounted on the output end of the first motor 19. The first main gear 21, which cooperates with the first driven gear 17, is mounted on one end of the drive shaft 20. The second main gear 22 is mounted on the end of the drive shaft 20 away from the first motor 19. The second driven gear 23 is fixedly mounted on the end of the first screw 11. The first main gear 21 and the second main gear 22 are the same size, and the distance between the first main gear 21 and the second main gear 22 is the same as the horizontal distance between the first driven gear 17 and the second driven gear 23. The first driven gear 17 and the second driven gear 23 have the same thickness, and the thickness of the first driven gear 17 is twice the thickness of the first main gear 21.

[0041] Partial working principle: When the pump body 13 is rotated independently, the starting cylinder 18 controls the drive shaft 20 at the output end of the first motor 19 to move horizontally. At this time, the drive shaft 20 is located at the leftmost end, and only the first driven gear 17 meshes with the first main gear 21. When the pump body 13 and the first screw 11 are rotated simultaneously, the cylinder 18 controls the drive shaft 20 to be located in the middle position, and the first driven gear 17 meshes with the first main gear 21, and the second driven gear 23 meshes with the second main gear 22. When the first screw 11 is controlled independently, the cylinder 18 controls the drive shaft 20 to be located at the rightmost end, and at this time only the second driven gear 23 meshes with the second main gear 22.

[0042] In this embodiment, a lubrication groove is provided inside the protective shell 15, and the first driven gear 17, the first main gear 21, the drive shaft 20 and the second driven gear 23 are all located inside the lubrication groove.

[0043] Local working principle: During gear transmission, the presence of lubrication grooves can lubricate the gears and reduce the friction between them.

[0044] In this embodiment, the cylindrical metal part 8 includes a first arc plate 24, a second arc plate 25, and a reset mechanism 26. The first arc plate 24 is symmetrically attached to the inner side of the end plate 9. The outer side of the first arc plate 24 away from the end plate 9 is provided with an arc groove along the circumference. The end plate 9 is provided with a reset mechanism 26 on the side close to the first arc plate 24 and between the two sets of first arc plates 24. The second arc plate 25 is provided between the sides of the two sets of first arc plates 24. The end of the second arc plate 25 away from the end plate 9 is flush with the end face of the first arc plate 24. The end of the second arc plate 25 passes through the end plate 9 and is slidably connected between the end plates 9. The end of the second arc plate 25 away from the first arc plate 24 is provided with a withdrawal mechanism.

[0045] Local working principle: When separating the cylindrical metal part 8 from the pipe, the extraction mechanism controls the horizontal movement of two sets of second arc plates 25. The second arc plates 25 are pulled out from between the first arc plates 24. Under the force of the reset mechanism 26, the two sets of first arc plates 24 are put into contact with each other. At this time, the first arc plates 24 are separated from the pipe, and the horizontal length of the first arc plates 24 is less than the inner diameter of the pipe. Therefore, the first arc plates 24 can be removed, completing the separation between the cylindrical metal part 8 and the pipe.

[0046] In this embodiment, the reset mechanism 26 includes a sleeve 27, a tension spring 28, and a slide rod 29. The sleeve 27 is vertically fixed on the side of the end plate 9. Both ends of the sleeve 27 are provided with tension springs 28. The ends of the tension springs 28 are fixed with slide rods 29 between them and the inner side of the first arc-shaped plate 24.

[0047] Local working principle: When the support force between the inner sides of the two sets of first arc plates 24 is lost, the tension spring 28 will apply a tension force to the first arc plates 24, causing the first arc plates 24 to move towards each other and fit together.

[0048] In this embodiment, the extraction mechanism includes a mounting plate 30, a collar 31, a second motor 32, a second screw 33, and a threaded hole 34. The mounting plate 30 is fixed to the ends of two sets of second arc-shaped plates 25. The collar 31 is sleeved on the inner threaded tube 10 and slides along the length of the inner threaded tube 10. The bottom of the collar 31 is equipped with the second motor 32. The output end of the second motor 32 is equipped with a second screw 33 that is parallel to the inner threaded tube 10. The second screw 33 passes through the end plate 9 and is rotatably connected to the mounting plate 30. The end plate 9 is provided with a threaded hole 34 that mates with the second screw 33.

[0049] Local working principle: When the second arc plate 25 is pulled out horizontally, the second motor 32 is started to drive the rotation of the second screw 33. Since the second screw 33 is threadedly connected to the end plate 9, the second screw 33 moves horizontally toward the end plate 9. The movement of the second screw 33 controls the two sets of second arc plates 25 on the mounting plate 30 to be pulled out. The movement of the second screw 33 drives the second motor 32 to move along the length of the inner spiral tube 10.

[0050] In this embodiment, a ball bearing is uniformly mounted on the inner side of the collar 31, and the ball bearing contacts the outer side of the inner threaded tube 10.

[0051] Local working principle: When the collar 31 moves along the length of the internal threaded tube 10, the friction between it and the internal threaded tube 10 is reduced.

[0052] In this embodiment, the lifting mechanism 16 includes a rectangular frame plate 35, a limiting groove 36, casters 37, a crossbar 38, a cross telescopic rod 39, and a column 40. The rectangular frame plate 35 is vertically arranged on the top of the base 1 and is parallel to each other. The top of each rectangular frame plate 35 is provided with a limiting groove 36, and the bottom of each rectangular frame plate 35 is equipped with a caster 37. A crossbar 38 is installed between the two sides of the inner side of the rectangular frame plate 35. A cross telescopic rod 39 is provided between adjacent rectangular frame plates 35, and the crossbar 38 is fixed to the limiting pin at the intersection of the cross telescopic rods 39. The column 40 is fixed to the top of the base 1, and the inner side of the column 40 is connected to one end of the cross telescopic rod 39. The inner side of the end plate 9 is fixedly connected to the rectangular frame plate 35 at the end away from the central cavity 4.

[0053] Local working principle: When the end plate 9 moves horizontally, it will drive a group of rectangular frame plates 35 to slide simultaneously. There are cross telescopic rods 39 between the rectangular frame plates 35. Therefore, multiple groups of rectangular frame plates 35 move at the same time, supporting the pipe at the bottom. The spacing between the rectangular frame plates 35 is the same, which improves the support effect.

[0054] In this embodiment, a third motor 41 is installed on the top of the mixing chamber 12, the output end of the third motor 41 extends into the interior of the mixing chamber 12, and a stirring shaft 42 is installed on the output end of the third motor 41.

[0055] Local working principle: After the raw materials enter the mixing chamber 12, the third motor 41 is started to drive the stirring shaft 42 to quickly mix and stir the raw materials.

[0056] like Figures 1-8 As shown in the figure, the molding process of the DCPD continuous reactive extrusion molding device for engineering machinery provided in this embodiment is as follows:

[0057] Step 1: The raw materials first enter the pump body 13 for mixing, and then the rotation of the pump body 13 is controlled by the transmission component 14 to inject the mixed raw materials into the die 2. After the injection is completed, the die 2 is kept under the set pressure.

[0058] Step 2: A temperature-carrying fluid medium is circulated inside the central cavity 4 inside the mandrel 3, a heat insulation medium is circulated inside the heat insulation medium loop 5, a heating medium is circulated inside the heating medium loop 6, and a cooling medium is circulated inside the cooling medium loop 7 to ensure the continuous reaction of the raw material and to form it inside the die 2.

[0059] Step 3: Since the arc-shaped groove at the end of the cylindrical metal part 8 is filled with raw material, the end of the pipe is connected to the cylindrical metal part 8 after the raw material is cooled and formed. At this time, the transmission component 14 controls the rotation of the first screw 11, thereby driving the cylindrical metal part 8 to pull the formed pipe out horizontally. While the cylindrical metal part 8 moves horizontally, the transmission component 14 controls the rotation of the pump body 13 to automatically replenish the raw material and ensure that the die 2 is in a constant pressure state.

[0060] Step 4: After the cooled and formed pipe is pulled out from inside the die 2, the bottom of the pipe is supported by the lifting mechanism 16. The pipe itself will not deform due to gravity. After the pipe is transported horizontally to a certain length, it is cut using a cutting device.

[0061] Step 5: After the end of the pipe near the die 2 is cut off, the cylindrical metal part 8 is separated from the end of the pipe, and the extrusion molding of the single pipe is completed. Then, the first screw 11 is rotated independently by the transmission component 14 to reset the cylindrical metal part 8 and re-insert it into the inside of the die 2 for further processing of the pipe.

[0062] The above description is merely a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A DCPD continuous reactive extrusion molding apparatus for engineering machinery, comprising a die (2), a base (1) supporting the die (2) below the die (2), a mandrel (3) fixed at the middle position inside the die (2), a central cavity (4) inside the mandrel (3), and a heat insulation medium loop (5), a heating medium loop (6), and a cooling medium loop (7) arranged sequentially outside the die (2) along its length, characterized in that: A cylindrical metal part (8) is slidably provided at one end of the die (2). A lifting mechanism (16) is provided below the cylindrical metal part (8). An end plate (9) is vertically provided at the end of the cylindrical metal part (8) away from the die (2). An internal thread tube (10) is provided on the top of the end plate (9) near the die (2) and parallel to the length direction of the die (2). A first screw (11) is installed on the internal thread of the internal thread tube (10). The top of the die (2) is away from the cylindrical metal part (8). 8) has a mixing chamber (12) at one end, a pump body (13) below the mixing chamber (12), the input end of the pump body (13) is connected to the inside of the mixing chamber (12), the output end of the pump body (13) is connected to the inside of the die (2), a protective shell (15) is provided on the outside of the pump body (13), the end of the first screw (11) is rotatably connected to the protective shell (15), and a transmission assembly (14) is provided between the end of the first screw (11) and the transmission shaft of the pump body (13). The transmission assembly (14) includes a first driven gear (17), a cylinder (18), a first motor (19), a drive shaft (20), a first main gear (21), a second main gear (22), and a first arc plate (24). The first driven gear (17) is mounted on the drive shaft of the pump body (13). The cylinder (18) is horizontally mounted on the die (2). The first motor (19) is mounted on the output end of the cylinder (18). The drive shaft (20) is horizontally mounted on the output end of the first motor (19). The first main gear (22) that mates with the first driven gear (17) is mounted on one end of the drive shaft (20). 1) A second main gear (22) is installed at the end of the drive shaft (20) away from the first motor (19). A second driven gear (23) is fixedly installed at the end of the first screw (11). The first main gear (21) and the second main gear (22) are the same size, and the distance between the first main gear (21) and the second main gear (22) is the same as the horizontal distance between the first driven gear (17) and the second driven gear (23). The first driven gear (17) and the second driven gear (23) are the same thickness, and the thickness of the first driven gear (17) is twice the thickness of the first main gear (21). The cylindrical metal part (8) includes a first arc plate (24), a second arc plate (25), and a reset mechanism (26). The first arc plate (24) is symmetrically attached to the inner side of the end plate (9). The outer side of the first arc plate (24) away from the end plate (9) is provided with an arc groove along the circumference. The end plate (9) is provided with a reset mechanism (26) on the side close to the first arc plate (24) and between the two sets of first arc plates (24). The second arc plate (25) is provided between the sides of the two sets of first arc plates (24). The end of the second arc plate (25) away from the end plate (9) is flush with the end face of the first arc plate (24). The end of the second arc plate (25) passes through the end plate (9) and is slidably connected between the end plates (9). The end of the second arc plate (25) away from the first arc plate (24) is provided with a pull-out mechanism. The lifting mechanism (16) includes a rectangular frame plate (35), a limiting groove (36), a caster wheel (37), a cross bar (38), a cross telescopic bar (39), and a column (40). The rectangular frame plate (35) is vertically set on the top of the base (1). The rectangular frame plates (35) are parallel to each other. The top of each rectangular frame plate (35) is provided with a limiting groove (36). The bottom of each rectangular frame plate (35) is equipped with a caster wheel (37). A cross bar (38) is installed between the two sides inside the rectangular frame plate (35). A cross telescopic bar (39) is provided between adjacent rectangular frame plates (35). The cross bar (38) is fixed on the limiting pin at the intersection of the cross telescopic bars (39). The column (40) is fixed on the top of the base (1). The inner side of the column (40) is connected to one end of the cross telescopic bar (39). The inner side of the end plate (9) is fixedly connected to the rectangular frame plate (35) at the end away from the central cavity (4).

2. The DCPD continuous reactive extrusion molding apparatus for engineering machinery according to claim 1, characterized in that: The protective shell (15) has a lubrication groove inside, and the first driven gear (17), the first main gear (21), the drive shaft (20) and the second driven gear (23) are all located inside the lubrication groove.

3. The DCPD continuous reactive extrusion molding apparatus for engineering machinery according to claim 2, characterized in that: The reset mechanism (26) includes a sleeve (27), a tension spring (28) and a slide rod (29). The sleeve (27) is vertically fixed on the side of the end plate (9). Both ends of the sleeve (27) are provided with tension springs (28). The ends of the tension springs (28) are fixed with slide rods (29) between the end of the tension springs (28) and the inner side of the first arc plate (24).

4. The DCPD continuous reactive extrusion molding apparatus for engineering machinery according to claim 3, characterized in that: The extraction mechanism includes a mounting plate (30), a collar (31), a second motor (32), a second screw (33), and a threaded hole (34). The mounting plate (30) is fixed to the ends of two sets of second arc plates (25). The collar (31) is sleeved on the inner threaded tube (10) and slides along the length of the inner threaded tube (10). The bottom of the collar (31) is equipped with a second motor (32). The output end of the second motor (32) is equipped with a second screw (33) that is parallel to the inner threaded tube (10). The second screw (33) passes through the end plate (9) and is rotatably connected to the mounting plate (30). The end plate (9) is provided with a threaded hole (34) that mates with the second screw (33).

5. The DCPD continuous reactive extrusion molding apparatus for engineering machinery according to claim 4, characterized in that: The inner side of the collar (31) is uniformly fitted with balls, and the balls are in contact with the outer side of the inner threaded tube (10).

6. The DCPD continuous reactive extrusion molding apparatus for engineering machinery according to claim 1, characterized in that: A third motor (41) is installed on the top of the mixing chamber (12), the output end of the third motor (41) extends into the interior of the mixing chamber (12), and a stirring shaft (42) is installed on the output end of the third motor (41).

7. The molding process of the DCPD continuous reactive extrusion molding apparatus for engineering machinery according to any one of claims 1-6, characterized in that, Includes the following steps: Step 1: The raw material first enters the pump body (13) for mixing, and then the transmission component (14) is used to control the rotation of the pump body (13) to inject the mixed raw material into the die (2). After the injection is completed, the die (2) is kept under a set pressure. Step 2: A heat-carrying fluid medium is circulated inside the central cavity (4) inside the mandrel (3), a heat-insulating medium is circulated inside the heat-insulating medium loop (5), a heating medium is circulated inside the heating medium loop (6), and a cooling medium is circulated inside the cooling medium loop (7) to ensure the continuous reaction of the raw materials and to form them inside the die (2). Step 3: Since the arc groove at the end of the cylindrical metal part (8) is filled with raw material, the end of the pipe is connected to the cylindrical metal part (8) after the raw material is cooled and formed. At this time, the transmission component (14) controls the rotation of the first screw (11), thereby driving the cylindrical metal part (8) to pull the formed pipe out horizontally. While the cylindrical metal part (8) moves horizontally, the transmission component (14) controls the rotation of the pump body (13) to automatically replenish the raw material and ensure that the die (2) is in a constant pressure state. Step 4: After the cooled and formed pipe is pulled out from the inside of the die (2), the bottom of the pipe is supported by the lifting mechanism (16). The pipe itself will not deform due to gravity. After the pipe is transported horizontally to a certain length, it is cut using a cutting device. Step 5: After the end of the pipe near the die (2) is cut off, the cylindrical metal part (8) is separated from the end of the pipe, and the extrusion molding of the single pipe is completed. Then, the first screw (11) is rotated separately by the transmission assembly (14) to reset the cylindrical metal part (8) and re-insert it into the inside of the die (2) for further processing of the pipe.

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