Device and process for preparing hot-rolled non-woven fabric polypropylene staple fibers for vehicles

Abstract

The invention relates to the technical field of melt staple fiber spinning, in particular to a device and process for preparing hot-rolled non-woven fabric polypropylene staple fibers for vehicles. The device comprises a heating tank, a connecting disc is rotationally arranged at one end of an inclined section of the heating tank, a connecting cylinder is rotationally arranged at one end of the connecting disc, and a fiber drawing device is arranged in the heating tank; in the wire drawing and winding processes, the wire pressing and winding processes are both located in the cooling liquid, and due to the fact that one end of the driving shaft penetrates through the connecting disc and extends into the connecting cylinder, the driving shaft can transmit heat of the heating tank to the cooling liquid, so that the cooling liquid has a certain temperature; the cooling tank is arranged on the cooling pipe, so that the thick filaments cannot lose plasticity due to too low temperature while being cooled in the process of pressing the thick filaments into thin filaments, and meanwhile, airflow generated by rotation of the fan blades can be blown to the cooling pipe to reduce the temperature of cooling liquid in the cooling tank, so that the fibers can be gradually cured, and required physical properties are achieved.

Description

Technical Field

[0001] The present application relates to the field of melt staple spinning technology, and in particular to a device and process for preparing hot-rolled non-woven polypropylene staple fibers for automobiles. Background Art

[0002] Hot-rolled non-woven fabric is a non-woven fabric that is not made through traditional textile processes (such as weaving or knitting), but by bonding the fiber web directly together through a hot rolling process. The hot rolling process is to bond the fibers to each other under high temperature and pressure to form a non-woven fabric with a certain strength and density.

[0003] The hot-rolled non-woven polypropylene staple fiber for automobiles is a material used in the fields of automobile interior, sound insulation, heat insulation, etc. It is a non-woven fabric made of short fibers made of polypropylene through a hot-rolling process.

[0004] Among them, polypropylene is a thermoplastic plastic with good chemical stability, heat resistance, corrosion resistance, insulation and low density. Polypropylene staple fibers are obtained by melting polypropylene resin, extruding it into filaments through a spinneret, and then cutting them. These staple fibers have good physical properties, such as high strength, good wear resistance, chemical corrosion resistance, etc. For example, a polypropylene fiber staple spinning device with publication number CN113755956A relates to the field of melt staple textile technology. In the prior art, a screw extrusion piece is provided on the top of the machine body, and a feeding assembly is provided on the side of the screw extrusion piece facing away from the machine body. The feeding assembly is connected to the screw extrusion piece, including a combined spinning assembly, which is placed at the front of the machine body and connected to the screw extrusion piece. Spinning and cooling are used in parallel. Among them, compared with traditional air flow blowing cooling, the cooling piece innovatively contacts the silk thread and rubs the silk bundle slightly, so that the silk thread can fully contact the air flow caused by the cooling piece, and is more fully cooled.

[0005] However, the above-mentioned prior art still has some defects when preparing polypropylene fibers:

[0006] 1. In the above-mentioned prior art, the steam part is connected to the extrusion part, and the extrusion part is connected to the feeding assembly. Among them, the combined spinning assembly also includes a hose, one end of the hose is connected to the cooling part, and the other end of the hose is connected to a cooling pipe, one end of the cooling pipe is connected to the steam part, which is used to introduce air flow into the hose, and use the heat of the screw extrusion part to generate steam to achieve cooling treatment of the silk thread, but the steam will also take away the heat of the extrusion part, affecting the silk thread that has just been cooled, which may cause temperature fluctuations of the silk thread and affect the physical properties and quality of the silk thread.

[0007] 2. In the above-mentioned prior art, the cooling element of the combined spinning assembly periodically rubs the silk thread to ensure that the silk thread is in full contact with the airflow generated by the cooling element, thereby achieving efficient cooling. Compared with traditional cooling technology, this solution utilizes the heat generated by the screw extruder during operation and uses steam as a heat exchange medium to achieve efficient cooling of the silk thread. However, during this process, the cooling gas and steam may come into contact with the surface of the silk thread, resulting in the generation of harmful byproducts during the cooling process of the silk thread. These byproducts may contain harmful gases, which may pollute the environment if not properly handled and pose a potential risk to the health of operators.

[0008] Based on this, and in accordance with the above-mentioned viewpoints, there is still room for improvement in the existing technology for preparing polypropylene fibers. Summary of the invention

[0009] In order to solve the above technical problems, the present application provides a device and process for preparing hot-rolled non-woven polypropylene staple fibers for automobiles, adopting the following technical solutions:

[0010] In a first aspect, a preparation device for hot-rolled non-woven polypropylene staple fibers for automobiles comprises a heating tank, one end of the heating tank is provided with an inclined section, one end of the inclined section of the heating tank is rotatably provided with a connecting disk, one end of the connecting disk is rotatably provided with a connecting cylinder, and a wire drawing device is provided in the heating tank;

[0011] The wire drawer includes a driving shaft that is transmitted through the heating tank, the driving shaft is provided with a spiral blade located in the heating tank, one end of the driving shaft passes through a connecting disk and extends into a connecting tube, a plurality of wire outlet holes are opened on the connecting disk, and a plurality of wire drawing disks located in the connecting tube are provided on the driving shaft.

[0012] Preferably, the wire drawing device also includes a window, the wire drawing disk is provided with windows corresponding to the wire outlet holes one by one, support shafts are symmetrically arranged in the window, screw pressing rods are rotatably arranged on two of the support shafts, a wire pressing groove is provided on the screw pressing rod, and a wire pressing hole is formed between the two wire pressing grooves in the same window.

[0013] Preferably, the diameter of the wire pressing hole on the wire drawing disk gradually decreases along the conveying direction of the spiral blade.

[0014] Preferably, a wire winding member is provided in the connecting tube;

[0015] The wire winding member comprises a winding shaft rotatably passed through one end of a connecting tube, a winding hole is provided on the winding shaft, a winding frame is provided at one end of the winding shaft located in the connecting tube, a wire pressing sliding hole connected to the winding hole and located in the winding frame is symmetrically provided on the winding shaft, and sliders corresponding to the wire pressing sliding holes are symmetrically and slidably provided in the winding frame;

[0016] A wire pressing spring is arranged between the opposite sides of the two sliders and the winding frame, a wire pressing roller corresponding to the wire pressing sliding hole is rotatably arranged on the slider, a wire pressing groove is opened on the wire pressing roller, and a winding pressing hole is formed between the two wire pressing grooves.

[0017] Preferably, a cooling tank is rotatably provided at one end of the winding shaft, a discharge hole is opened at one end of the cooling tank, a water storage frame connected to the cooling tank is provided at one end of the cooling tank, and a guide shaft is symmetrically and rotatably provided inside the cooling tank.

[0018] Preferably, a temperature controller is provided at one end of the heating tank;

[0019] The temperature controller includes a circulation tank arranged on a connecting tube, a reciprocating screw rod rotatably penetrated through the circulation tank, a sealing plate threadably arranged in the circulation tank and threadably connected to the reciprocating screw rod, a plurality of one-way valves are arranged on the sealing plate, a connecting pipe communicating with the connecting tube is arranged at one end of the circulation tank through a check valve, and a connecting pipe communicating with the cooling tank is arranged at one end of the circulation tank through a check valve.

[0020] Preferably, a plurality of cooling tubes are provided between the connecting tube and the cooling tank, and a fan blade located between the connecting tube and the cooling tank is provided on the winding shaft.

[0021] Preferably, a filter is provided on the connecting pipe.

[0022] Preferably, a driving member is provided on the heating tank;

[0023] The driving member comprises a driving toothed disc arranged on the connecting disc, a driving motor connected to the reciprocating screw rod is arranged on the heating tank through a bracket, and a driving gear meshing with the driving toothed disc is arranged on the driving end of the driving motor;

[0024] The winding shaft and the reciprocating screw rod are connected by belt transmission.

[0025] In a second aspect, a process for preparing hot-rolled non-woven polypropylene staple fibers for automobiles, wherein the process for using the hot-rolled non-woven polypropylene staple fibers comprises the following steps:

[0026] S1: Melting and forming, the polypropylene granules and powder enter into the heating tank, and the heating tank melts the polypropylene granules and makes them molten to increase the flow rate of the molten material and ensure that the molten material flows smoothly from the heating tank to the connecting plate;

[0027] S2: Extrusion treatment, then the driving member drives the driving shaft to rotate, the rotating driving shaft drives the spiral blade, the spiral blade is located in the heating tank and conveys the molten polypropylene to the connecting disk through rotation. In this process, the molten material passes through the inclined section, and the flow rate of the molten material increases accordingly;

[0028] S3: multifilament winding, at this time, multiple filaments are formed, and these filaments are then wound by a winding piece arranged in a connecting tube, and finally merged into a fiber. The winding piece ensures that the multiple filaments are evenly merged to form a fiber with uniform diameter and good physical properties;

[0029] S4: During the cooling, forming, drawing and winding processes, the filament pressing and winding processes are all in the coolant. Since one end of the drive shaft passes through the connecting disk and extends into the connecting cylinder, the drive shaft transfers the heat of the heating tank to the coolant to ensure that the thick wire does not lose its plasticity due to too low temperature while cooling down during the process of pressing the thick wire into the thin wire.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. In the process of wire drawing and winding of the present invention, the process of thin filament pressing and winding are both located in the cooling liquid. Since one end of the driving shaft passes through the connecting disk and extends into the connecting cylinder, the driving shaft will transfer the heat of the heating tank to the cooling liquid, so that the cooling liquid has a certain temperature to ensure that the thick filaments will not lose their plasticity due to excessively low temperature while being cooled during the process of pressing the thick filaments into thin filaments. At the same time, the airflow generated by the rotation of the fan blades will blow on the cooling pipe to reduce the temperature of the coolant in the cooling tank, ensuring that the fibers can gradually solidify and achieve the required physical properties. By adjusting the temperature of the heating tank and the circulation speed of the coolant, the temperature of the coolant is controlled to ensure that the thick filaments maintain a certain plasticity while being cooled.

[0032] 2. The rotation of the drive shaft of the present invention will drive the connecting disk to rotate together. After the molten material passes through the inclined section, it will be squeezed out from a number of wire outlet holes on the connecting disk to form preliminary thick wires, and then enter the connecting tube. The thick wires will pass through a plurality of corresponding wire pressing holes in turn. The thick wires pass through the wire pressing holes on the drawing disk, are squeezed by the wire pressing rod, and are gradually stretched and reduced in diameter to form the required thin wires. These thin wires are then wound by a wire winding piece arranged in the connecting tube, and are finally merged into a fiber. The wire winding piece ensures that multiple thin wires can be evenly merged to form a fiber with uniform diameter and good physical properties, which not only improves the production efficiency, but also ensures the quality and consistency of the fiber.

[0033] 3. The present invention removes impurities through a filter, and in the production of polypropylene staple fibers, keeping the coolant clean can prevent the fibers from being contaminated during the molding process, thereby improving the quality of the fibers.

[0034] 4. The connecting cylinder of the present invention includes an upper connecting cylinder and a lower connecting cylinder, which are connected by a hinge, and the upper connecting cylinder and the lower connecting cylinder are connected to each other to form a sealed connecting cylinder, and the winder can be inspected and maintained by opening the upper connecting cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the present invention.

[0036] Figure 2 It is a cross-sectional view of the present invention.

[0037] Figure 3 It is a structural schematic diagram of the wire drawing device of the present invention.

[0038] Figure 4 It is a structural schematic diagram of the wire drawing disk of the present invention.

[0039] Figure 5 The present invention Figure 4 A partial enlarged view of point A in the middle.

[0040] Figure 6 It is a schematic structural diagram of the wire-winding suction element of the present invention.

[0041] Figure 7 It is a cross-sectional view of the wire winding member of the present invention.

[0042] Figure 8 It is a planar cross-sectional view of the wire winding member of the present invention.

[0043] Fig. 9 It is a structural schematic diagram of the temperature controller of the present invention.

[0044] Fig.10 It is a cross-sectional view of the thermostat of the present invention.

[0045] Fig.11 It is a cross-sectional view of the feeder of the present invention.

[0046] Fig.12 The present invention Fig.11 A partial enlarged view of point B in the middle.

[0047] Description of the reference numerals: 1. Heating tank; 11. Inclined section; 2. Connecting plate; 3. Connecting cylinder; 31. Connecting upper cylinder; 32. Connecting lower cylinder; 4. Wire drawing device; 41. Driving shaft; 42. Spiral blade; 43. Wire outlet hole; 44. Wire drawing plate; 45. Window; 46. Support shaft; 47. Wire pressing rod; 48. Wire pressing groove; 49. Wire pressing hole; 5. Wire winding member; 51. Winding shaft; 52. Winding hole; 53. Winding frame; 531. Wire pressing sliding hole; 54. Sliding block; 541. Wire pressing spring; 542. Wire pressing roller; 55. Wire pressing groove; 551. Winding pressing hole; 5 6. Cooling tank; 57. Discharge hole; 58. Water storage frame; 59. Guide shaft; 6. Temperature controller; 61. Circulation tank; 62. Reciprocating screw rod; 63. Sealing plate; 64. One-way valve; 65. Connecting pipe; 66. Connecting pipe; 67. Cooling pipe; 68. Fan blade; 69. Filter; 7. Driving part; 71. Driving gear plate; 72. Driving motor; 73. Driving gear; 8. Feeder; 81. Feed pipe; 82. Feed hopper; 83. Transmission disc; 84. Transmission shaft; 85. Threaded rolling rod; 86. Transmission gear; 87. Driven gear; 88. Transmission motor. DETAILED DESCRIPTION

[0048] The following is combined with Figures 1 to 12 This application is described in further detail.

[0049] The embodiment of the present application discloses a preparation device and process for hot-rolled non-woven polypropylene staple fibers for automobiles. The raw materials are heated and melted, and then the molten material is extruded to make it flow smoothly out of a heating tank to form filaments. Then, multiple filaments are evenly merged to form a fiber with uniform diameter and good physical properties. This not only improves production efficiency, but also ensures the quality and consistency of the fibers.

[0050] Embodiment 1:

[0051] Reference Figure 1 and Figure 2 A preparation device for hot-rolled non-woven polypropylene staple fibers for automobiles comprises a heating tank 1. When preparing polypropylene fibers, polypropylene particles are first placed in the heating tank 1 to melt the polypropylene particles and make them molten. An inclined section 11 is provided at one end of the heating tank 1 to increase the flow speed of the molten material and ensure that the molten material can smoothly flow from the heating tank 1 to a connecting disk 2 rotatably arranged at one end of the inclined section 11, and then enter into a connecting cylinder 3 rotatably arranged at one end of the connecting disk 2. Then, a driving member 7 provided on the heating tank 1 drives the connecting disk 2 to drive a wire drawer 4 provided in the heating tank 1 to draw the molten polypropylene into filaments.

[0052] At the same time, the driving member 7 will drive the thermostat 6 set at one end of the connecting disk 2 heating tank 1. The thermostat 6 is used to control the temperature during the wire drawing process, so that the temperature of the filaments gradually decreases, and then stretches and shapes them to ensure that the filaments have the required physical properties and dimensional accuracy.

[0053] The filaments are wound into a ball through the existing winding technology to guide the wire drawing movement. The winder has sufficient tension control to ensure that the filaments will not break or over-stretch during the winding process. The winding speed of the filaments is controlled by adjusting the speed of the winder. The winding speed is matched with the wire drawing speed to ensure that the filaments can be evenly wound on the ball. During the winding process, a quality inspection system is set up to monitor the diameter, density and appearance of the ball in real time to ensure that the ball meets the quality standards.

[0054] Reference Figures 3 to 5 Specifically, the wire drawer 4 includes a driving shaft 41 that is rotatably arranged in the heating tank 1. After the polypropylene particles are placed in the heating tank 1, the heating tank 1 will heat and melt the polypropylene particles to make them molten, and then the driving member 7 will drive the connecting disk 2 to drive the driving shaft 41 to rotate. The rotating driving shaft 41 will drive the spiral blades 42 set on the driving shaft 41. The spiral blades 42 are located in the heating tank 1 and transport the molten polypropylene to the connecting disk 2 by rotation. In this process, the molten material will pass through the inclined section 11. Due to the gradual reduction of the circulation space, the flow rate of the molten material remains unchanged, and the flow rate of the molten material will increase accordingly, thereby realizing efficient and uniform transportation of the material and improving production efficiency.

[0055] The rotation of the driving shaft 41 will drive the connecting disk 2 to rotate together. After the molten material passes through the inclined section 11, it will be squeezed out from a number of wire outlet holes 43 opened on the connecting disk 2 to form preliminary thick wires, and then enter the connecting tube 3. One end of the driving shaft 41 passes through the connecting disk 2 and extends into the connecting tube 3. A plurality of drawing disks 44 located in the connecting tube 3 are arranged on the driving shaft 41. The driving shaft 41 will drive the drawing disks 44 to rotate synchronously with the connecting disk 2.

[0056] The wire drawing disk 44 is provided with windows 45 corresponding to the wire outlet holes 43 , and support shafts 46 are symmetrically arranged in the windows 45 . Screw pressing rods 47 are rotatably arranged on the two support shafts 46 , and the screw pressing rods 47 are provided with wire pressing grooves 48 , and a wire pressing hole 49 is formed between the two wire pressing grooves 48 in the same window 45 .

[0057] The thick wire will pass through multiple corresponding wire pressing holes 49 in sequence, and at the same time, the thick wire will collide with two wire pressing grooves 48, causing the wire pressing rod 47 to rotate, and the diameter of the wire pressing hole 49 on the wire drawing disk 44 gradually decreases along the conveying direction of the spiral blade 42. The thick wire passes through the wire pressing hole 49 on the wire drawing disk 44, is squeezed by the wire pressing rod 47, and is gradually stretched and reduced in diameter to form the required thin wire. During the entire wire drawing process, the quality of thin wire forming and production efficiency are ensured through the precise control of the temperature controller 6 and the wire pressing rod 47.

[0058] At this time, multiple filaments will be formed, which are then wound through the winding piece 5 set in the connecting tube 3 and finally merged into a fiber. The winding piece 5 ensures that the multiple filaments can be evenly merged to form a fiber with uniform diameter and good physical properties, which not only improves the production efficiency, but also ensures the quality and consistency of the fiber.

[0059] Reference Figures 6 to 8 The wire winding member 5 includes a winding shaft 51 which is rotatably passed through one end of the connecting tube 3, a winding hole 52 is provided on the winding shaft 51, a winding frame 53 is provided at one end of the winding shaft 51 located in the connecting tube 3, a wire pressing sliding hole 531 which is connected to the winding hole 52 and located in the winding frame 53 is symmetrically provided on the winding shaft 51, and sliders 54 which correspond to the wire pressing sliding holes 531 in a one-to-one manner are symmetrically and slidably provided in the winding frame 53.

[0060] A wire pressing spring 541 is arranged between the opposite sides of the two sliders 54 and the winding frame 53. A wire pressing roller 542 corresponding to the wire pressing sliding hole 531 is rotatably arranged on the slider 54. A wire pressing groove 55 is opened on the wire pressing roller 542. Multiple filaments will pass through the two wire pressing grooves 55 to form a winding pressing hole 551.

[0061] Since the rotation of the connecting disk 2 will drive the driving shaft 41 to rotate together, while the winding frame 53 will not rotate, the filament is wound into a fiber under the rotation, and the slider 54 will drive the wire pressing roller 542 to slide into the wire pressing slide hole 531 under the action of the wire pressing spring 541 to press the filament. At the same time, the wire pressing roller 542 will rotate under the friction of the fiber to further press and fix the filament.

[0062] The fiber then passes through the winding hole 52 and enters a cooling tank 56 rotatably arranged at one end of the winding shaft 51, then passes under a guide shaft 59 symmetrically and rotatably arranged in the cooling tank 56, passes through a discharge hole 57 opened at one end of the cooling tank 56 and is connected to the existing winder; and the cooling tank 56 is injected with coolant, and the wound fiber will pass under the guide shaft 59 and fully contact with the coolant. The coolant quickly reduces the temperature of the fiber through heat exchange, and as the temperature decreases, the fiber will gradually solidify to achieve the desired physical properties.

[0063] At the same time, the driving member 7 drives the winding shaft 51 and the driving shaft 41 to rotate in opposite directions, and the rotating winding shaft 51 drives the winding frame 53 to rotate together, thereby ensuring the correct winding of the fiber.

[0064] The fibers will bring out the cooling liquid when passing through the discharge hole 57. The water storage frame 58 provided at one end of the cooling tank 56 receives the cooling liquid brought out by the fibers. The cooling tanks 56 are connected to each other to guide the received cooling liquid back into the cooling tanks 56.

[0065] Reference Fig. 9 and Fig.10 Specifically, the temperature controller 6 includes a circulation tank 61 provided on the connecting tube 3, and a reciprocating screw 62 is rotatably penetrated on the circulation tank 61. The driving member 7 drives the reciprocating screw 62 to rotate, and the rotating reciprocating screw 62 drives the sealing plate 63 slidingly provided in the circulation tank 61 through a threaded connection, so that the sealing plate 63 reciprocates in the circulation tank 61. During the movement of the sealing plate 63, one end of the circulation tank 61 is connected to the cooling tank 56 through a connecting pipe 66 provided with a check valve, which will flow the coolant in the cooling tank 56 into the circulation tank 61, and then the reciprocating motion of the sealing plate 63 driven by the reciprocating screw 62 pushes the coolant to flow in the circulation tank 61, and the check valve on the connecting pipe 66 prevents the coolant from flowing back.

[0066] Then, the coolant will pass through the multiple one-way valves 64 set on the sealing plate 63, and then flow into the connecting tube 3 from one end of the circulation tank 61 through the connecting pipe 65 connected to the connecting tube 3 set by the check valve, ensuring that the coolant can only flow in one direction to prevent backflow.

[0067] During the wire drawing and winding process, the filament pressing and winding process are both in the coolant. Since one end of the drive shaft 41 passes through the connecting disk 2 and extends into the connecting tube 3, the drive shaft 41 transfers the heat of the heating tank 1 to the coolant, so that the coolant has a certain temperature to ensure that when the thick wire is pressed into thin wire, the thick wire will not lose its plasticity due to excessively low temperature while cooling down.

[0068] As the coolant continuously enters the connecting tube 3, the heated coolant will enter the cooling tank 56 through the multiple cooling tubes 67 provided between the connecting tube 3 and the cooling tank 56. During this process, the rotation of the winding shaft 51 will drive the fan blades 68 provided thereon and located between the connecting tube 3 and the cooling tank 56, so that the fan blades 68 rotate synchronously. The fan blades 68 are located between the cooling tubes 67. The airflow generated by the rotation of the fan blades 68 will blow on the cooling tubes 67 to reduce the temperature of the coolant in the cooling tank 56 and ensure that the fiber can gradually solidify to achieve the required physical properties.

[0069] By adjusting the temperature of the heating tank 1 and the circulation speed of the coolant, the temperature of the coolant is controlled to ensure that the thick wire maintains a certain plasticity while being cooled.

[0070] A filter 69 is provided on the connecting pipe 66, and impurities are removed through the filter 69. For the production of polypropylene staple fibers, keeping the coolant clean can prevent the fibers from being contaminated during the molding process, thereby improving the quality of the fibers.

[0071] Among them, the connecting cylinder 3 includes an upper connecting cylinder 31 and a lower connecting cylinder 32, the upper connecting cylinder 31 and the lower connecting cylinder 32 are connected by a hinge, and the upper connecting cylinder 31 and the lower connecting cylinder 32 are connected to each other to form a sealed connecting cylinder 3, and the winder can be inspected and maintained by opening the upper connecting cylinder 31.

[0072] Specifically, the driving member 7 includes a driving gear plate 71 arranged on the connecting plate 2, and a driving motor 72 is arranged on the heating tank 1 through a bracket. When the driving motor 72 is started, the driving motor 72 will drive the reciprocating screw 62 connected to it to rotate, thereby driving the sealing plate 63 to move in the circulation tank 61; the winding shaft 51 and the reciprocating screw 62 are connected by a belt drive, and the rotating reciprocating screw 62 will drive the winding shaft 51 to rotate together through the belt drive.

[0073] At the same time, the driving motor 72 drives the driving gear 73 provided on its driving end. The driving gear 73 drives the connecting disk 2 to rotate by meshing with the driving gear disk 71. The rotating connecting disk 2 drives the driving shaft 41 to rotate synchronously.

[0074] Embodiment 2:

[0075] Reference Fig.11 and Fig.12 On the basis of the first embodiment, a feeder 8 is provided on the heating tank 1, and the feeder 8 includes a feed pipe 81 which is obliquely arranged on the heating tank 1 and connected to the heating tank 1, a feed funnel 82 which is connected to the feed pipe 81 is provided on the feed pipe 81, and a transmission disk 83 is provided inside the feed pipe 81.

[0076] A transmission shaft 84 rotatably penetrates the transmission disc 83 and is rotatably connected to the feed pipe 81 . A plurality of threaded rolling rods 85 are rotatably arranged on the transmission disc 83 circumferentially and uniformly. The plurality of threaded rolling rods 85 are threadably matched with each other.

[0077] A transmission gear 86 is rotatably provided on the transmission shaft 84, and one end of the threaded rolling rod 85 passes through and is provided with a driven gear 87 meshing with the production gear.

[0078] When preparing polypropylene fiber, first start the transmission motor 88 (at Figure 1 ), the transmission motor 88 drives the transmission shaft 84 connected thereto to rotate, and the rotating transmission shaft 84 drives the transmission gear 86 to rotate together, and the transmission gear 86 drives the threaded rolling rod 85 to rotate by engaging with the driven gear 87.

[0079] The polypropylene particles are then placed into the feed hopper 82 , and enter the feed pipe 81 along the feed funnel 82 , and are then crushed into powder by the threaded crushing rod 85 , and are then supplied to the heating tank 1 through the feed pipe 81 , in preparation for the subsequent melting and drawing processes.

[0080] Finally, the present invention also provides a preparation process of hot-rolled non-woven polypropylene staple fibers for automobiles, and the use method thereof comprises the following steps:

[0081] S1: Raw material crushing. First, start the transmission motor 88 set on the feed pipe 81. The transmission motor 88 will drive the transmission shaft 84 connected to it to rotate. The rotating transmission shaft 84 will drive the transmission gear 86 to rotate together. The transmission gear 86 drives the threaded rolling rod 85 to rotate by engaging with the driven gear 87. Then, put the polypropylene particles into the feed funnel 82. The polypropylene particles will enter the feed pipe 81 along the feed funnel 82, and then be crushed into powder by the threaded rolling rod 85, and then supplied to the heating tank 1 through the feed pipe 81 to prepare for the subsequent melting and drawing process.

[0082] S2: After melting and forming, the polypropylene particle powder enters into the heating tank 1, which melts the polypropylene particle powder and makes it molten. An inclined section 11 is provided at one end of the heating tank 1 to increase the flow speed of the molten material and ensure that the molten material can smoothly flow from the heating tank 1 to the connecting disk 2 which is rotatably provided at one end of the inclined section 11.

[0083] S3: traction winding, the filament is wound into a ball through the existing winding machine technology to guide the wire drawing movement. The winding machine has sufficient tension control to ensure that the filament will not break or over-stretch during the winding process. The winding speed of the filament is controlled by adjusting the speed of the winding machine. The winding speed matches the wire drawing speed to ensure that the filament can be evenly wound on the ball;

[0084] S4: Extrusion treatment, then the driving member 7 drives the driving shaft 41 to rotate, the rotating driving shaft 41 drives the spiral blade 42 set on the driving shaft 41, and the spiral blade 42 is located in the heating tank 1 and conveys the molten polypropylene to the connecting disk 2 by rotation; in this process, the melted material will pass through the inclined section 11. Due to the gradual reduction of the circulation space, the flow rate of the molten material remains unchanged, and the flow rate of the molten material will increase accordingly, thereby realizing efficient and uniform transportation of the material and improving production efficiency.

[0085] S5: Multifilament winding, at this time, multiple filaments will be formed, and these filaments are then wound through the winding piece 5 set in the connecting tube 3, and finally merged into a fiber. The winding piece 5 ensures that the multiple filaments can be evenly merged to form a fiber with uniform diameter and good physical properties, which not only improves the production efficiency, but also ensures the quality and consistency of the fiber.

[0086] S6: During the cooling, forming, wire drawing and winding processes, the filament pressing and winding processes are all in the coolant. Since one end of the drive shaft 41 passes through the connecting disk 2 and extends into the connecting tube 3, the drive shaft 41 transfers the heat of the heating tank 1 to the coolant, so that the coolant has a certain temperature to ensure that the thick wire will not lose its plasticity due to too low temperature while cooling down during the process of pressing the thick wire into thin wire.

[0087] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for preparing hot-rolled non-woven polypropylene staple fibers for automobiles, comprising a heating tank (1), characterized in that: One end of the heating tank (1) is provided with an inclined section (11), one end of the inclined section (11) of the heating tank (1) is rotatably provided with a connecting disk (2), one end of the connecting disk (2) is rotatably provided with a connecting cylinder (3), and a wire drawing device (4) is provided inside the heating tank (1); The wire drawing device (4) comprises a driving shaft (41) which is driven and passed through the heating tank (1); the driving shaft (41) is provided with a spiral blade (42) which is located in the heating tank (1); one end of the driving shaft (41) passes through the connecting disk (2) and extends into the connecting tube (3); a plurality of wire outlet holes (43) are provided on the connecting disk (2); and a plurality of wire drawing disks (44) which are located in the connecting tube (3) are provided on the driving shaft (41).

2. The device for preparing hot-rolled non-woven polypropylene staple fibers for vehicles according to claim 1, characterized in that: The wire drawing device (4) also includes a window (45), and the wire drawing disk (44) is provided with windows (45) corresponding to the wire outlet holes (43) one by one. Support shafts (46) are symmetrically arranged in the windows (45), and screw pressing rods (47) are rotatably arranged on the two support shafts (46). The screw pressing rods (47) are provided with a wire pressing groove (48), and a wire pressing hole (49) is formed between the two wire pressing grooves (48) in the same window (45).

3. The device for preparing hot-rolled non-woven polypropylene staple fibers for vehicles according to claim 2, characterized in that: The diameter of the wire pressing hole (49) on the wire drawing disk (44) gradually decreases along the conveying direction of the spiral blade (42).

4. The device for preparing hot-rolled non-woven polypropylene staple fibers for vehicles according to claim 2, characterized in that: A wire winding member (5) is arranged inside the connecting tube (3); The wire winding member (5) comprises a winding shaft (51) rotatably inserted into one end of the connecting tube (3), a winding hole (52) being provided on the winding shaft (51), a winding frame (53) being provided at one end of the winding shaft (51) located in the connecting tube (3), a wire pressing sliding hole (531) being symmetrically provided on the winding shaft (51) and being communicated with the winding hole (52) and being located in the winding frame (53), and sliding blocks (54) being symmetrically and slidably provided in the winding frame (53) and corresponding to the wire pressing sliding holes (531) one by one; A wire pressing spring (541) is arranged between the opposite sides of the two sliders (54) and the winding frame (53); a wire pressing roller (542) corresponding to the wire pressing sliding hole (531) is rotatably arranged on the slider (54); a wire pressing groove (55) is formed on the wire pressing roller (542); and a winding pressing hole (551) is formed between the two wire pressing grooves (55).

5. The device for preparing hot-rolled non-woven polypropylene staple fibers for vehicles according to claim 4, characterized in that: A cooling tank (56) is rotatably provided at one end of the winding shaft (51), a discharge hole (57) is provided at one end of the cooling tank (56), a water storage frame (58) connected to the cooling tank (56) is provided at one end of the cooling tank (56), and a guide shaft (59) is symmetrically and rotatably provided inside the cooling tank (56).

6. The device for preparing hot-rolled non-woven polypropylene staple fibers for vehicles according to claim 5, characterized in that: A temperature controller (6) is provided at one end of the heating tank (1); The temperature controller (6) comprises a circulation tank (61) provided on a connecting tube (3), a reciprocating screw rod (62) rotatably passing through the circulation tank (61), a sealing plate (63) threadably connected to the reciprocating screw rod (62) being slidably provided in the circulation tank (61), a plurality of one-way valves (64) being provided on the sealing plate (63), a connecting pipe (65) communicating with the connecting tube (3) via a check valve being provided at one end of the circulation tank (61), and a connecting pipe (66) communicating with a cooling tank (56) being provided at one end of the circulation tank (61) via a check valve.

7. The device for preparing hot-rolled non-woven polypropylene staple fibers for vehicles according to claim 6, characterized in that: A plurality of cooling pipes (67) are arranged between the connecting tube (3) and the cooling tank (56), and a fan blade (68) located between the connecting tube (3) and the cooling tank (56) is arranged on the winding shaft (51).

8. The device for preparing hot-rolled non-woven polypropylene staple fibers for vehicles according to claim 6, characterized in that: The connecting pipe (66) is provided with a filter (69).

9. The device for preparing hot-rolled non-woven polypropylene staple fibers for vehicles according to claim 7, characterized in that: The heating tank (1) is provided with a driving member (7); The driving member (7) comprises a driving toothed disc (71) arranged on the connecting disc (2); a driving motor (72) connected to the reciprocating screw rod (62) is arranged on the heating tank (1) via a bracket; a driving gear (73) meshing with the driving toothed disc (71) is arranged on the driving end of the driving motor (72); The winding shaft (51) and the reciprocating screw rod (62) are connected via a belt drive.

10. A process for preparing hot-rolled non-woven polypropylene staple fibers for automobiles, comprising a device for preparing hot-rolled non-woven polypropylene staple fibers for automobiles as claimed in any one of claims 1 to 9, characterized in that: The use process includes the following steps: S1: melting and forming, the polypropylene granule powder enters into the heating tank (1), and the heating tank (1) melts the polypropylene granule powder to make the polypropylene granules molten, so as to increase the flow rate of the molten material and ensure that the molten material flows smoothly from the heating tank (1) to the connecting plate (2); S2: extrusion treatment, then the driving member (7) drives the driving shaft (41) to rotate, the rotating driving shaft (41) drives the spiral blade (42), the spiral blade (42) is located in the heating tank (1) and conveys the molten polypropylene to the connecting plate (2) through rotation. In this process, the molten material passes through the inclined section (11), and the flow rate of the molten material increases accordingly; S3: multifilament winding, at which point a plurality of filaments are formed, which are then wound by a winding member (5) disposed in the connecting tube (3) and finally merged into a fiber. The winding member (5) ensures that the plurality of filaments are evenly merged to form a fiber with a uniform diameter and good physical properties; S4: During the cooling, forming, wire drawing and winding processes, the filament pressing and winding processes are all in the cooling liquid. Since one end of the driving shaft (41) passes through the connecting disk (2) and extends into the connecting tube (3), the driving shaft (41) transfers the heat of the heating tank (1) to the cooling liquid to ensure that the thick filaments are cooled down during the process of being pressed into thin filaments, and do not lose plasticity due to too low a temperature.

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