A raw tape stretching machine

Abstract

The present invention relates to a raw tape stretching machine, comprising a feeding mechanism, a heating mechanism, a stretching mechanism and a winding mechanism which are arranged in sequence, the feeding mechanism comprising a mounting frame and a discharge shaft for placing a barrel, the discharge shaft being rotatably arranged on the mounting frame, the mounting frame being further provided with a clutch brake, the output end of the clutch brake being provided with a brake gear, the discharge shaft being provided with a transmission gear matched with the brake gear, the mounting frame being further provided with a first guide roller, the first guide roller being rotatably arranged on the mounting frame, the mounting frame being further provided with a rocking arm which can swing in a vertical plane, one end of the rocking arm being hinged on the mounting frame, the other end being hinged with a pressure roller, the pressure roller being arranged below the first guide roller, the mounting frame being provided with a sensor for sensing the swing position of the rocking arm, the sensor being arranged in cooperation with the clutch brake. The present invention can improve the stretching quality of the raw tape and improve the processing efficiency.

Description

Technical Field

[0001] The invention relates to a raw tape stretching machine. Background Art

[0002] Raw tape is commonly used in the field of plumbing. Using raw tape at the joints of pipe fittings can improve the sealing performance of pipe fittings. Raw tape is processed from polytetrafluoroethylene into a thin strip-shaped film. After being processed by a stretching machine, it forms a raw tape whose chemical properties meet the requirements. Traditional raw tape stretching machines generally include a feeding mechanism, a heating mechanism, a stretching mechanism, and a receiving mechanism. For example, in the Chinese invention patent with authorization announcement number CN 103434129B, entitled "A stretching machine and stretching method for polytetrafluoroethylene raw tape", a raw tape stretching machine is disclosed, including a feeding device, a heating device, a stretching device, and a winding device arranged in sequence; the feeding device includes a frame, and a reel shaft for placing polytetrafluoroethylene film is provided on the frame.

[0003] In the feeding device of the traditional raw tape stretching machine, the film is wound on the feeding reel, and the film is pulled by the traction device of the subsequent process, thereby driving the feeding reel to rotate for unloading. As the feeding reel rotates, the film gradually becomes less, and the outer diameter of the film gradually becomes smaller. Since the feeding reel will generate a certain rotational inertia when rotating, the excess film will be released. In the case of different film amounts in the feeding reel, the amount of film released may also be different, causing the film to be in a certain state of relaxation at the feeding device. When the relaxation amount is large, it needs to be adjusted, affecting production efficiency. In addition, if the feeding reel does not rotate smoothly and evenly on the frame, it may also cause uneven film feeding, causing film relaxation, affecting the subsequent film stretching quality.

[0004] In addition, the traditional raw tape stretching machine has the following problems: 1. In the feeding device and the winding device, the barrel is sleeved in the winding shaft, and the barrel is locked or clamped on the winding shaft through two end covers. The raw tape is wound on the drum, and the barrel rotates with the winding shaft to reel in and release the material. In this traditional raw tape stretching machine, the barrel needs to be locked or disassembled when disassembling and assembling, which is troublesome to operate and affects production efficiency. 2. The stretching roller in the heating chamber has uneven heat, which affects the stretching efficiency of the film, and the heat will be transmitted to the power device through the rotating shaft. When the temperature of the power device is too high, it will affect the service life of the power device.

[0005] In view of this, the inventor conducted in-depth research on the above-mentioned issues, and thus the present case was produced. Summary of the invention

[0006] The object of the present invention is to provide a raw tape stretching machine which can improve the stretching quality of the raw tape and enhance the processing efficiency.

[0007] In order to achieve the above object, the present invention adopts such technical solution:

[0008] A raw tape stretching machine comprises a feeding mechanism, a heating mechanism, a stretching mechanism and a winding mechanism which are arranged in sequence. The feeding mechanism comprises a mounting frame and a discharge shaft for placing a material barrel. The discharge shaft is rotatably arranged on the mounting frame. A clutch brake is also provided on the mounting frame. A brake gear is provided at the output end of the clutch brake. A transmission gear matching the brake gear is provided on the discharge shaft. A first material guide roller is also provided on the mounting frame. The first material guide roller is rotatably arranged on the mounting frame. A rocking arm which can swing in a vertical plane is also provided on the mounting frame. One end of the rocking arm is hinged on the mounting frame, and the other end is hinged with a pressure roller. The pressure roller is arranged below the first material guide roller. A sensing device for sensing the swing position of the rocking arm is provided on the mounting frame. The sensing device is arranged in conjunction with the clutch brake.

[0009] As a preferred embodiment of the present invention, the brake clutch is a magnetic powder brake, the magnetic powder brake has a main rotor and a slave rotor, and the brake gear is installed on the shaft of the main rotor.

[0010] As a preferred embodiment of the present invention, it also includes a second material guide roller rotatably arranged on the mounting frame, the second material guide roller is arranged between the discharge shaft and the first material guide roller, and the discharge shaft, the first material guide roller, the second material guide roller and the pressure roller are all arranged in the horizontal direction.

[0011] As a preferred embodiment of the present invention, a rotatable support shaft is provided on the mounting frame, there are two rocking arms, which are respectively mounted on two ends of the support shaft, and two ends of the pressure roller are respectively mounted on the two rocking arms, a first bearing and a second bearing are mounted on the mounting frame, a first support position for supporting one end of the discharge shaft is formed between the first bearing and the second bearing, a third bearing and a fourth bearing are mounted on the mounting frame, a second support position for supporting the other end of the discharge shaft is formed between the third bearing and the fourth bearing, and the sensing device includes a sensor arranged on the mounting frame and a sensing wheel cooperating with the sensor, the wheel surface of the sensing wheel is arranged corresponding to the sensor, the sensing wheel is mounted on the support shaft, and the sensing wheel is an eccentric wheel or a cam.

[0012] As a preferred embodiment of the present invention, the winding mechanism includes a winding shaft and a motor for driving the winding shaft to rotate, a connecting rod is passed through the winding shaft, and a supporting barrel section for placing a barrel is provided on the winding shaft, one end of the connecting rod is a driving end passing through the winding shaft, and the other end of the connecting rod is a tightening end extending into the supporting barrel section, and a first axially movable cone block, a first limit block and a second limit block for limiting the stroke of the first cone block are sleeved in the tightening end, a space for the first cone block to move is formed between the first limit block and the second limit block, a first guide hole is opened on the barrel wall of the supporting barrel section, the first guide hole passes through the outer wall of the supporting barrel section to the inner wall, a first tightening block which can move radially when the first cone block moves axially is provided in the first guide hole, and the first tightening block is abutted against the cone surface of the first cone block.

[0013] As a preferred embodiment of the present invention, there are multiple first guide holes, and the multiple first guide holes are arranged along the circumference of the support tube section. There are multiple first tightening blocks, and the first tightening blocks are provided with a first clamping groove. The multiple first tightening blocks are connected together by a first elastic clamp, and the first elastic clamp is sleeved in the first clamping groove. A first top pressure spring is also provided between the first cone block and the second limit block, and an axially movable second cone block, a third limit block and a fourth limit block for limiting the stroke of the second cone block are also sleeved in the tightening end, and a space for the second cone block to move is formed between the third limit block and the fourth limit block, and a second guide block is provided on the cylinder wall of the support tube section. The first guide hole and the second guide hole are arranged along the axial direction of the support tube section, the second guide hole passes through the outer wall of the support tube section to the inner wall, the second guide hole is provided with a second expansion block which can move radially and extend out of the second guide hole when the second cone block moves axially, the second expansion block is arranged on the conical surface of the second cone block, there are multiple second guide holes, multiple second guide holes are arranged along the circumferential direction of the support tube section, there are multiple second expansion blocks, a second clamping groove is provided on the second expansion block, multiple second expansion blocks are connected together by a second elastic clamp, the second elastic clamp is sleeved in the second clamping groove, and a second top pressure spring is provided between the second cone block and the fourth limit block.

[0014] As a preferred embodiment of the present invention, a driving gear is also provided on the driving end, and the driving gear is transmission-connected to the motor. The driving end is connected to a linear driving mechanism for driving the connecting rod to move axially. The linear driving mechanism is an electric push rod, and the telescopic end of the electric push rod is connected to the connecting rod. A reset spring is provided between the retractable shaft and the telescopic end of the electric push rod, and the reset spring is sleeved on the connecting rod.

[0015] As a preferred embodiment of the present invention, the heating mechanism comprises a heating chamber, wherein the heating chamber comprises a rotating shaft rotatably arranged in the heating chamber, one end of the rotating shaft is a mounting portion located in the heating chamber, and the other end is a power portion located outside the heating chamber, a roller is mounted on the mounting portion, and the rotating shaft comprises a hollow section between the roller and the power portion, and a plurality of heat dissipation holes are arranged on the hollow section, and the heat dissipation holes penetrate from the inner wall to the outer wall of the hollow section.

[0016] As a preferred embodiment of the present invention, an axial hole is provided on the cavity wall of the heating chamber, the diameter of the axial hole is larger than the outer diameter of the hollow section, the mounting part and the power part are both solid shafts, and the two ends of the hollow section are respectively connected to the mounting part and the power part by welding.

[0017] As a preferred embodiment of the present invention, the roller includes a cylinder body with openings at both ends, a first cover plate and a second cover plate, the first cover plate and the second cover plate are respectively arranged at both ends of the cylinder body, the mounting portion is penetrated through the first cover plate and the second cover plate and locked on the second cover plate, a plurality of first air flow holes are provided on the first cover plate, and the plurality of first air flow holes are arranged around the mounting portion, a plurality of second air flow holes are provided on the second cover plate, and the plurality of second air flow holes are arranged around the mounting plate, a support frame is provided on the outer wall of the heating chamber, a limiting cylinder is provided on the support frame, the power section is installed in the limiting cylinder through a guide bearing, the power section extends out of the limiting cylinder and is installed with a transmission sprocket.

[0018] After adopting the technical solution of the present invention, when in use, the film on the barrel is wound around the pressure roller and the first guide roller, and a storage area is formed between the first guide roller and the barrel. The pressure roller presses on the film, which can make the film in a tensioned state. The swing position of the rocker arm is sensed by the sensing device, thereby controlling the brake clutch to achieve braking or discharge, so that the amount of film in the storage area is controlled within a certain range, reducing the maintenance time required due to film relaxation, and providing a relatively stable tension for the subsequent stretching machine to improve the stretching quality. Furthermore, in the unloading shaft of the feeding mechanism or the rewinding shaft of the rewinding mechanism (the unloading shaft and the rewinding shaft are collectively referred to as the unloading shaft) in the present application, a quick barrel changing mechanism is adopted, the barrel is sleeved on the expansion end, the connecting rod is pulled by the driving end, the first cone block is driven to move axially through the second limit block, the first cone block pushes the first expansion block to extend out of the first guide hole, the first expansion block presses against the inner wall of the barrel to expand the barrel, so that the barrel and the rewinding shaft can move synchronously, and the connecting rod is driven by the driving end to move in another direction, so that the first expansion block can be retracted into the first guide hole, the barrel is released, and the barrel is disassembled. The present invention has the advantage of convenient disassembly and assembly of the barrel, thereby improving the processing efficiency of the raw tape. Furthermore, in the heating chamber of the present invention, the heating chamber has a rotating shaft rotatably arranged in the heating chamber. By arranging heat dissipation holes in the hollow section and cooperating with the rotation of the rotating shaft, the heat in the hollow section can be dissipated, thereby reducing the heat transfer to the power part of the rotating shaft. In addition, arranging the power part of the rotating shaft outside the heating chamber also contributes to the heat dissipation of the power part, reduces the heat transfer to the power device, and increases the service life of the power device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the feeding mechanism in the present invention.

[0021] Figure 3 It is a structural schematic diagram of the feeding mechanism in the present invention from another angle.

[0022] Figure 4 It is a schematic diagram of the structure of the heating chamber in the present invention.

[0023] Figure 5 for Figure 4 AA section view.

[0024] Figure 6 for Figure 4 Middle BB section view.

[0025] Figure 7 It is a structural schematic diagram of the transmission mechanism of the present invention.

[0026] Figure 8 It is a structural schematic diagram of the rotating shaft of the present invention.

[0027] Fig. 9 It is a structural schematic diagram of the heating mechanism in the present invention.

[0028] Fig.10 It is a structural schematic diagram of the first terminal in the present invention.

[0029] Fig.11 It is a structural schematic diagram of the quick barrel changing mechanism in the present invention.

[0030] Fig.12 It is a structural schematic diagram of another use state of the quick barrel changing mechanism in the present invention.

[0031] Fig.13 It is a schematic structural diagram of the support cylinder section of the present invention.

[0032] Fig.14 It is a schematic structural diagram of the first expansion block of the present invention.

[0033] Fig.15 Another structural schematic diagram of the present invention.

[0034] In the figure:

[0035] Feeding mechanism 10

[0036] Mounting frame 101 Unloading shaft 102

[0037] First guide roller 103 Second guide roller 104

[0038] Pressing roller 105 Rocking arm 106

[0039] Support shaft 107 Counterweight rod 108

[0040] First bearing 109 Second bearing 110

[0041] The third bearing 111 The fourth bearing 112

[0042] Transmission gear 113 Braking clutch 114

[0043] Braking gear 115 Sensor 116

[0044] Induction wheel 117 Discharging barrel 118

[0045] Heating chamber 20

[0046] Preheating heating chamber 21 Stretching heating chamber 22

[0047] Molding heating chamber 23 Heat dissipation channel 24

[0048] Mounting plate 251 First terminal 252

[0049] Second connection terminal 253 Infrared heating tube 254

[0050] First Handle 255 Second Handle 256

[0051] First conductive pillar 257 First supporting block 258

[0052] First pressing block 259 Preheating roller 211

[0053] Heating plate 212 Forming roller 231

[0054] First handle 255 Second handle 256

[0055] First conductive column 257 First upper support block 2581

[0056] The first lower support block 2582 The first upper pressing block 2591

[0057] The first pressing block 2592 The first wire 260

[0058] Second conductive column 262 Second upper support block 2621

[0059] Second lower support block 2622 Second upper pressing block 2631

[0060] The second pressing block 2632 The second wire 264

[0061] Stretching mechanism 30

[0062] Cylinder 301 First cover plate 302

[0063] First air flow hole 303 Second cover plate 304

[0064] Second air flow hole 305 Rotating shaft 306

[0065] Limiting cylinder 307 Guide bearing 308

[0066] Support frame 309 Preheating roller 211

[0067] Power unit 3601 Installation unit 3602

[0068] Hollow section 3603 Heat dissipation hole 3604

[0069] Winding mechanism 40

[0070] Receiving shaft 401 Supporting cylinder section 402

[0071] Connecting rod 403 First cone block 404

[0072] The first expansion block 405 The first limit block 406

[0073] Second limit block 407 First pressing spring 408

[0074] Second cone block 409 Second expansion block 410

[0075] The third limiting block 411 and the fourth limiting block 412

[0076] Second pressing spring 413 Linear drive mechanism 414

[0077] Return spring 415 Driving gear 416

[0078] First guide hole 417 Second guide hole 418

[0079] The first winding groove 419 and the second winding groove 420

[0080] First card slot 421 Correction device 422

[0081] Slitting device 423

[0082] First motor 51 First driving sprocket 52

[0083] First driven sprocket 53 Second motor 54

[0084] Second driven sprocket 55 Second driving sprocket 56

[0085] First chain 57 Second chain 58 DETAILED DESCRIPTION

[0086] In order to further explain the technical solution of the present invention, it is described in detail below with reference to the accompanying drawings.

[0087] Reference Figures 1 to 15 The present invention proposes a raw tape stretching machine, comprising a feeding mechanism 10, a heating mechanism, a stretching mechanism 30 and a winding mechanism 40 which are arranged in sequence. The outlet end of the feeding mechanism 10 is arranged corresponding to the inlet end of the heating mechanism, the stretching mechanism 30 is arranged in the heating chamber 20 of the heating mechanism, and the outlet end of the heating chamber 20 is arranged corresponding to the winding mechanism 40. The winding mechanism 40 can also be provided with a deviation correction device 422 and a slitting device 423. The deviation correction device 422 is used to adjust the conveying direction of the raw tape so that the raw material can be evenly wound on the barrel. The slitting device 423 can cut the raw tape into strips and then collect the material.

[0088] The feeding mechanism 10 of the raw tape stretching machine includes a mounting frame 101 and a discharge shaft 102 for placing a barrel (i.e., a discharge barrel 118). The discharge shaft 102 is rotatably arranged on the mounting frame 101. A clutch brake is also arranged on the mounting frame 101. A brake gear 115 is arranged at the output end of the clutch brake. A transmission gear 113 cooperating with the brake gear 115 is arranged on the discharge shaft 102. The brake gear 115 can be used to brake the transmission gear 113, thereby stopping the rotation of the barrel and the discharge shaft 102. The mounting frame 101 is also provided with a first material guide roller 103, which is rotatably arranged on the mounting frame 101. The mounting frame 101 is also provided with a rocking arm 106 that can swing in a vertical plane. One end of the rocking arm 106 is hinged to the mounting frame 101, and the other end is hinged with a pressure roller 105, which is arranged below the first material guide roller 103. In the embodiment, two material discharge shafts 102, two pressure rollers 105 and two first material guide rollers 103 are shown. Each material discharge shaft 102 can place a material discharge barrel 11, and the feeding mechanism can simultaneously load two material discharge barrels 118 for material discharge, thereby improving work efficiency. A sensing device for sensing the swing position of the rocking arm 106 is provided on the mounting frame 101, and the sensing device is arranged in conjunction with a clutch brake. Specifically, a controller is provided in the stretching machine of the present invention, and both the sensor and the clutch brake are connected to the controller, and the coordination of the sensing device and the clutch brake is achieved through the controller. As a preferred embodiment of the present invention, the braking clutch 114 is a magnetic powder brake, which has a main rotor and a slave rotor. The braking gear 115 is installed on the shaft of the main rotor. When the retractable shaft is unloading, the main rotor is idling, and the braking gear 115 rotates simultaneously with the transmission gear 113; when the main rotor and the slave rotor are combined, braking is achieved, so that the transmission gear 113 stops rotating.

[0089] As a preferred embodiment of the present invention, it also includes a second guide roller 104 rotatably arranged on the mounting frame 101, the second guide roller 104 is arranged between the discharge shaft 102 and the first guide roller 103, and the discharge shaft 102, the first guide roller, the second guide roller 104 and the pressure roller 105 are all arranged in the horizontal direction.

[0090] As a preferred embodiment of the present invention, a rotatable support shaft 107 is provided on the mounting frame 101, and the support shaft 107 is arranged in the horizontal direction. There are two rocking arms 106, and the two rocking arms 106 are arranged perpendicular to the support shaft 107. The two rocking arms 106 are respectively installed at both ends of the support shaft 107 and rotate with the support shaft 107. The two ends of the pressure roller 105 are respectively rotatably installed on the two rocking arms 106. In order to realize the tensioning effect of the pressure roller 105 on the film, a counterweight rod 108 can also be set on the two rocking arms 106 to increase the pressure of the pressure roller 105.

[0091] As a preferred embodiment of the present invention, the sensing device includes a sensor 116 arranged on a mounting frame 101 and a sensing wheel 117 cooperating with the sensor 116. The wheel surface of the sensing wheel 117 is arranged corresponding to the sensor 116. In an embodiment, the sensor 116 is arranged above the sensing wheel 117. The sensing wheel 117 is mounted on a support shaft 107. The sensing wheel 117 is an eccentric wheel or a cam, and rotates with the support shaft 107. When the sensing wheel 117 rotates to different positions, the sensor 116 can obtain different signals, which are sent to a controller, and the controller can control the braking degree of the magnetic powder clutch. As a preferred embodiment of the present invention, the mounting frame 101 is provided with a first bearing 109 and a second bearing 110, which are both rotatably mounted on the mounting frame 101, and the axes of the first bearing 109 and the second bearing 110 are arranged in parallel in the horizontal direction, and a first support position for supporting one end of the discharge shaft 102 is formed between the first bearing 109 and the second bearing 110, and a third bearing 111 and a fourth bearing 112 are installed on the mounting frame 101, and a second support position for supporting the other end of the discharge shaft 102 is formed between the third bearing 111 and the fourth bearing 112. With this structure, when loading, it is only necessary to respectively set the two ends of the discharge shaft 102 equipped with the barrel between the first bearing 109 and the second bearing 110 and between the third bearing 111 and the fourth bearing 112, and make the transmission gear 113 mesh with the brake gear 115, which has the advantage of convenient loading and unloading.

[0092] The present invention further proposes a quick barrel changing mechanism, which can be used for a feeding mechanism 10 or a winding mechanism 40, comprising a winding shaft 401 (embodied as a discharge shaft 102 in the feeding mechanism 10 and as a winding shaft 401 in the winding mechanism 40), wherein a connecting rod 403 is passed through the winding shaft 401, and the connecting rod 403 is coaxially arranged with the winding shaft 401, and a supporting barrel section 402 for placing a barrel is provided on the winding shaft 401, and the supporting barrel section 402 is a barrel body 301 structure with openings at both ends, one end of the connecting rod 403 is a driving end passing through the winding shaft 401, and the other end of the connecting rod 403 is a tightening end extending into the supporting barrel section 402, and a first cone block 404 which can move axially is sleeved in the tightening end, and a first cone block 404 for limiting the first cone block 404 is provided. The first limit block 406 and the second limit block 407 of the stroke are fixed on the connecting rod 403, and a space for the first cone block 404 to move is formed between the first limit block 406 and the second limit block 407. A first guide hole 417 is opened on the wall of the support cylinder section 402, and the first guide hole 417 penetrates from the outer wall to the inner wall of the support cylinder section 402. The first guide hole 417 is strip-shaped and extends along the length direction of the support cylinder section 402. A first tightening block 405 is provided in the first guide hole 417, which can move radially and extend out of the first guide hole 417 when the first cone block 404 moves axially. The first tightening block 405 is abutted against the conical surface of the first cone block 404 (the first tightening block 405 is provided with an inclined surface matching the conical surface).

[0093] As a preferred embodiment of the present invention, there are multiple first guide holes 417, and the multiple first guide holes 417 are arranged along the circumference of the support tube section 402. There are multiple first tightening blocks 405, specifically three or four. The first tightening block 405 is provided with a first clamping groove 421. The multiple first tightening blocks 405 are connected together by a first elastic clamp (not shown in the figure). The first elastic clamp can be, for example, an elastic rope, and the first elastic clamp is sleeved in the first clamping groove 421. In the embodiment, the first tightening block 405 is in a flat block shape, and a first winding groove 419 for the elastic clamp to be wound is provided on the first tightening block 405. The first winding groove 419 is provided on the support tube section 402 corresponding to the first clamping groove 421, and the first winding groove 419 is arranged along the circumference of the support tube section 402. The function of the elastic clamp of the present invention is to prevent the first tightening block 405 from automatically sliding out of the first guide hole 417, and can be contracted and expanded accordingly with the expansion and contraction of the first tightening block 405.

[0094] As a preferred embodiment of the present invention, a first pressure spring 408 is further provided between the first cone block 404 and the second limit block 407. The second limit block 407 transmits force to the first cone block 404 through the first pressure spring 408, so that the second limit block 407 can smoothly push the first cone block 404 to move. In the present invention, the diameter of the first cone block 404 is slightly smaller than the inner diameter of the supporting cylinder section 402.

[0095] As a preferred embodiment of the present invention, the expansion end is also provided with an axially movable second cone block 409, a third limit block 411 and a fourth limit block 412 for limiting the stroke of the second cone block 409, a space for the second cone block 409 to move is formed between the third limit block 411 and the fourth limit block 412, a second guide hole 418 is opened on the wall of the support cylinder section 402, the first guide hole 417 and the second guide hole 418 are arranged along the axial direction of the support cylinder section 402, the second guide hole 418 penetrates from the outer wall to the inner wall of the support cylinder section 402, a second expansion block 410 is provided in the second guide hole 418, which can move radially and extend out of the second guide hole 418 when the second cone block 409 moves axially, the second expansion block 410 is against the conical surface of the second cone block 409, and a second pressure spring 413 is provided between the second cone block 409 and the fourth limit block 412. The structure and installation method of the second expansion block 410 are the same as those of the first expansion block 405 , and the structures of the first cone block 404 and the second cone block 409 are the same.

[0096] As a preferred embodiment of the present invention, there are multiple second guide holes 418, which are arranged along the circumference of the support barrel section 402. There are multiple second tightening blocks 410, which are provided with second clamping grooves. Multiple second tightening blocks 410 are connected together by second elastic clamps, which are sleeved in the second clamping grooves. By providing the first tightening block 405 and the second tightening block 410 to support the barrel at multiple points, the barrel can be more stably matched on the support barrel section 402.

[0097] As a preferred embodiment of the present invention, the driving end is further provided with a driving gear 416, and the driving gear 416 is drivingly connected to the motor. As a preferred embodiment of the present invention, the driving end is connected with a linear driving mechanism 414 for driving the connecting rod 403 to move axially.

[0098] As a preferred embodiment of the present invention, the linear drive mechanism 414 is an electric push rod, the telescopic end of the electric push rod is connected to the connecting rod 403, a return spring 415 is provided between the retractable shaft 401 and the telescopic end of the electric push rod, and the return spring 415 is sleeved on the connecting rod 403. When in use, the connecting rod 403 is driven by the electric push rod to move axially, thereby driving the first cone block 404 and the second cone block 409 to move in the support cylinder section 402.

[0099] The present invention also proposes a roller installation mechanism for a raw tape stretching machine, including a rotating shaft 306 rotatably arranged in a heating chamber 20, the rotating shaft 306 is arranged in a horizontal direction, one end of the rotating shaft 306 is a mounting portion 3602 located in the heating chamber 20, and the other end is a power portion 3601 located outside the heating chamber 20, the power portion 3601 is connected to a power source to drive the rotating shaft 306 to rotate, a roller is installed on the mounting portion 3602, the rotating shaft 306 has a hollow section 3603 between the roller and the power portion 3601, and a plurality of heat dissipation holes 3604 are provided on the hollow section 3603, and the heat dissipation holes 3604 penetrate from the inner wall of the hollow section 3603 to the outer wall.

[0100] As a preferred embodiment of the present invention, an axial hole is provided on the cavity wall of the heating chamber 20, and the diameter of the axial hole is larger than the outer diameter of the hollow section 3603. In the embodiment, the hollow section 3603 does not contact the axial hole, and a heat dissipation channel 24 is formed between the hollow section 3603 and the axial hole. When the hollow section 3603 rotates, the heat in the hollow section 3603 can be dissipated from the heat dissipation channel 24.

[0101] As a preferred embodiment of the present invention, the mounting portion 3602 and the power portion 3601 are both solid shafts, and both ends of the hollow section 3603 are respectively connected to the mounting portion 3602 and the power portion 3601 by welding.

[0102] As a preferred embodiment of the present invention, the drum includes a cylinder 301 with openings at both ends, a first cover plate 302 and a second cover plate 304. The first cover plate 302 and the second cover plate 304 are respectively arranged at both ends of the cylinder 301, specifically, they are arranged at both ends of the cylinder 301 by welding. The mounting portion 3602 is penetrated through the first cover plate 302 and the second cover plate 304 and locked on the second cover plate 304.

[0103] As a preferred embodiment of the present invention, the first cover plate 302 is provided with a plurality of first airflow holes 303, which are arranged around the mounting portion 3602, and the second cover plate 304 is provided with a plurality of second airflow holes 305, which are arranged around the mounting portion 3602. By providing the first airflow holes 303 and the second airflow holes 305, the exchange of airflow inside and outside the cylinder 301 can be achieved, so that the temperature of the cylinder wall of the cylinder 301 is more uniform, and the stretching quality of the film is improved.

[0104] As a preferred embodiment of the present invention, a support frame 309 is provided on the outer wall of the heating chamber 20, a limiting cylinder 307 is provided on the support frame 309, the limiting cylinder 307 is locked on the support frame 309, and the power section is installed in the limiting cylinder 307 through a guide bearing 308. As a preferred embodiment of the present invention, the power section extends out of the limiting cylinder 307 and is installed with a transmission sprocket (specifically, the second driven sprocket 55), and the transmission sprocket is connected to the motor.

[0105] The present invention also proposes a transmission mechanism of a raw tape stretching machine, including a heating chamber 20, which is divided into a preheating heating chamber 21, a stretching heating chamber 22 and a shaping heating chamber 23 according to the film conveying direction. In the embodiment, the preheating heating chamber 21 is arranged above the stretching heating chamber 22, and the shaping heating chamber 23 is arranged on the right side of the preheating heating chamber 21 and the stretching heating chamber 22. A plurality of rotatable preheating rollers 211 are arranged in the preheating heating chamber 21, a plurality of rotatable stretching rollers are arranged in the stretching heating chamber 22, and a plurality of rotatable shaping rollers 231 are arranged in the shaping heating chamber 23. Each preheating roller 211 is driven by a first motor 51, and each stretching roller is driven by a second motor 54. The first motor 51 and the second motor 54 are both arranged outside the heating chamber 20. In the present invention, the preheating roller 211, the stretching roller and the shaping roller 231 are all arranged in the horizontal direction, and each stretching roller is driven by a second motor 54. The rotation speed of the stretching roller can be accurately adjusted by each second motor 54 to achieve accurate adjustment of the stretching ratio. In the present invention, the preheating roller 211 may be heated by a heating plate 212 disposed inside the preheating roller 211 .

[0106] As a preferred embodiment of the present invention, a first driving sprocket 52 is provided on the output shaft of the first motor 51, a first driven sprocket 53 is provided on the shaft of the preheating roller 211, and also includes a first chain 57 diffracted on the first driving sprocket 52 and the first driven sprocket 53.

[0107] As a preferred embodiment of the present invention, a second driving sprocket 56 is provided on the output shaft of one of the second motors 54, a second driven sprocket 55 is provided on the shaft of one of the stretching rollers, a second driven sprocket 55 is provided on the shaft of each of the shaping rollers 231, and each second driven sprocket 55 is connected to the second driving sprocket 56 via a second chain 58.

[0108] As a preferred embodiment of the present invention, there are five preheating rollers 211, three of which are arranged below two of them; there are five stretching rollers, three of which are arranged below two of them, and among the five stretching rollers, four stretching rollers are driven by four second motors 54 through gear transmission. With this structure, the raw tape film can be stretched five times, and the five stretching ratios can be controlled separately. Different stretching ratios can be set according to different materials, which is flexible and convenient, and effectively improves the stretching effect. There are seven shaping rollers 231, three of which are arranged above four of them.

[0109] The present invention also proposes a heating mechanism of a raw tape stretching machine, comprising a heating chamber 20 and a heating device arranged at the bottom of the heating chamber 20, wherein the heating device comprises a power supply, a mounting plate 251, and a plurality of infrared heating tubes 254 mounted on the mounting plate 251, and the power supply can be external mains electricity. The mounting plate 251 is arranged in a horizontal direction, and a first terminal 252 and a second terminal 253 are arranged on the upper surface of the mounting plate 251 corresponding to each infrared heating tube 254, and the first terminal 252 and the second terminal 253 are both electrically connected to the power supply, and the infrared heating tube 254 has a first mounting end and a second mounting end, and the first terminal 252 is arranged corresponding to the first mounting end, and the second terminal 253 is arranged corresponding to the second mounting end.

[0110] As a preferred embodiment of the present invention, the first terminal 252 includes a first upper support block 2581, a first lower support block 2582, a first conductive column 257, a first upper pressure block 2591 and a first lower pressure block 2592. The first upper support block 2581, the first lower support block 2582, the first upper pressure block 2591 and the first lower pressure block 2592 are all screwed on the first conductive column 257. The first upper support block 2581 and the first upper pressure block 2591 are arranged on one side of the mounting plate 251, and the first lower support block 2582 and the first lower pressure block 2592 are arranged on the other side of the mounting plate 251. The first mounting end is connected between the first upper support block 2581 and the first upper pressure block 2591 through a first wire 260.

[0111] As a preferred embodiment of the present invention, the second terminal 253 includes a second upper support block 2621, a second lower support block 2622, a second conductive column 261, a second upper pressure block 2631 and a second lower pressure block 2632. The second upper support block 2621, the second lower support block 2622, the second upper pressure block 2631 and the second lower pressure block 2632 are all screwed on the second conductive column 261. The second upper support block 2621 and the second upper pressure block 2631 are arranged on one side of the mounting plate 251, and the second lower support block 2622 and the second lower pressure block 2632 are arranged on the other side of the mounting plate 251. The second mounting end is connected between the second upper support block 2621 and the second upper pressure block 2631 through a second wire 264.

[0112] As a preferred embodiment of the present invention, the first terminal 252 and the second terminal 253 are respectively arranged at both ends of the mounting plate 251 along the width direction, the first terminal 252 is multiple, and the multiple first terminal 252 is arranged along the length direction of the mounting plate 251, the second terminal 253 is multiple, and the multiple second terminal 253 is arranged along the length direction of the mounting plate 251, and the multiple infrared heating tubes 254 are arranged along the width direction of the mounting plate 251.

[0113] As a preferred embodiment of the present invention, the upper surface of the mounting plate 251 is provided with a first handle 255 and a second handle 256 for assisting in lifting and placing the mounting plate 251 , and the entire mounting plate 251 can be lifted or lowered by the first handle 255 and the second handle 256 .

[0114] The product form of the present invention is not limited to the illustrations and embodiments of this case. Any appropriate changes or modifications made by anyone with similar ideas should be deemed to be within the patent scope of the present invention.

Claims

1. A raw tape stretching machine, comprising a feeding mechanism, a heating mechanism, a stretching mechanism and a winding mechanism arranged in sequence, the feeding mechanism comprising a mounting frame and a discharge shaft for placing a barrel, the discharge shaft being rotatably arranged on the mounting frame, characterized in that: The mounting frame is also provided with a brake clutch, the output end of the brake clutch is provided with a brake gear, the unloading shaft is provided with a transmission gear matched with the brake gear, the mounting frame is also provided with a first material guide roller, the first material guide roller is rotatably arranged on the mounting frame, the mounting frame is also provided with a rocking arm that can swing in a vertical plane, one end of the rocking arm is hinged to the mounting frame, and the other end is hinged with a pressure roller, the pressure roller is arranged below the first material guide roller, and a sensing device for sensing the swing position of the rocking arm is provided on the mounting frame, and the sensing device is arranged in conjunction with the brake clutch; The reeling mechanism comprises a reeling shaft and a motor for driving the reeling shaft to rotate, the reeling shaft is penetrated by a connecting rod, a supporting barrel section for placing a barrel is provided on the reeling shaft, one end of the connecting rod is a driving end passing through the reeling shaft, and the other end of the connecting rod is a tightening end extending into the supporting barrel section, a first cone block which can be axially moved, a first limit block and a second limit block for limiting the stroke of the first cone block are sleeved in the tightening end, a space for the first cone block to move is formed between the first limit block and the second limit block, a first guide hole is opened on the barrel wall of the supporting barrel section, the first guide hole passes through the outer wall of the supporting barrel section to the inner wall, a first tightening block which can be radially movable when the first cone block moves axially is provided in the first guide hole, and the first tightening block is abutted against the conical surface of the first cone block; There are a plurality of first guide holes, and the plurality of first guide holes are arranged along the circumference of the support tube section; there are a plurality of first tightening blocks, and a first clamping groove is provided on the first tightening block. The plurality of first tightening blocks are connected together by a first elastic clamp, and the first elastic clamp is sleeved in the first clamping groove; a first top pressure spring is also provided between the first cone block and the second limit block; a second cone block that can move axially, a third limit block and a fourth limit block for limiting the stroke of the second cone block are also sleeved in the tightening end; a space for the second cone block to move is formed between the third limit block and the fourth limit block; a second guide hole is opened on the cylinder wall of the support tube section, and the first A guide hole and a second guide hole are arranged along the axial direction of the support tube section, and the second guide hole penetrates from the outer wall to the inner wall of the support tube section. A second expansion block is provided in the second guide hole, which can move radially and extend out of the second guide hole when the second cone block moves axially. The second expansion block is abutted against the conical surface of the second cone block. There are multiple second guide holes, and multiple second guide holes are arranged along the circumference of the support tube section. There are multiple second expansion blocks, and a second clamping groove is provided on the second expansion block. Multiple second expansion blocks are connected together by a second elastic clamp, and the second elastic clamp is sleeved in the second clamping groove. A second top pressure spring is provided between the second cone block and the fourth limit block.

2. A raw tape stretching machine as claimed in claim 1, characterized in that: The brake clutch is a magnetic powder brake, which has a main rotor and a slave rotor, and the brake gear is installed on the shaft of the main rotor.

3. A raw tape stretching machine as claimed in claim 2, characterized in that: It also includes a second material guide roller rotatably arranged on the mounting frame, the second material guide roller is arranged between the discharge shaft and the first material guide roller, and the discharge shaft, the first material guide roller, the second material guide roller and the pressure roller are all arranged in the horizontal direction.

4. A raw tape stretching machine as claimed in claim 3, characterized in that: The mounting frame is provided with a rotatable supporting shaft, there are two rocking arms, which are respectively mounted at two ends of the supporting shaft, and two ends of the pressure roller are respectively mounted on the two rocking arms, the mounting frame is provided with a first bearing and a second bearing, a first supporting position for supporting one end of the discharge shaft is formed between the first bearing and the second bearing, the mounting frame is provided with a third bearing and a fourth bearing, a second supporting position for supporting the other end of the discharge shaft is formed between the third bearing and the fourth bearing, the sensing device comprises a sensor arranged on the mounting frame and a sensing wheel matched with the sensor, the wheel surface of the sensing wheel is arranged corresponding to the sensor, the sensing wheel is mounted on the supporting shaft, and the sensing wheel is an eccentric wheel or a cam.

5. A raw tape stretching machine as claimed in claim 4, characterized in that: The driving end is also provided with a driving gear, which is transmission-connected to the motor. The driving end is connected with a linear driving mechanism for driving the connecting rod to move axially. The linear driving mechanism is an electric push rod. The telescopic end of the electric push rod is connected to the connecting rod. A return spring is provided between the retractable shaft and the telescopic end of the electric push rod. The return spring is sleeved on the connecting rod.

6. A raw tape stretching machine as claimed in claim 5, characterized in that: The heating mechanism comprises a heating chamber, wherein the heating chamber comprises a rotating shaft rotatably arranged in the heating chamber, one end of the rotating shaft is a mounting portion located in the heating chamber, and the other end is a power portion located outside the heating chamber, a roller is mounted on the mounting portion, and the rotating shaft comprises a hollow section between the roller and the power portion, and a plurality of heat dissipation holes are arranged on the hollow section, and the heat dissipation holes penetrate from the inner wall to the outer wall of the hollow section.

7. A raw tape stretching machine as claimed in claim 6, characterized in that: An axial hole is provided on the cavity wall of the heating chamber, the diameter of the axial hole is larger than the outer diameter of the hollow section, the mounting part and the power part are both solid shafts, and the two ends of the hollow section are respectively connected to the mounting part and the power part by welding.

8. A raw tape stretching machine as claimed in claim 7, characterized in that: The roller includes a cylinder body with openings at both ends, a first cover plate and a second cover plate, the first cover plate and the second cover plate are respectively arranged at both ends of the cylinder body, the mounting portion is penetrated through the first cover plate and the second cover plate and locked on the second cover plate, a plurality of first air flow holes are arranged on the first cover plate, and the plurality of first air flow holes are arranged around the mounting portion, a plurality of second air flow holes are arranged on the second cover plate, and the plurality of second air flow holes are arranged around the mounting portion, a support frame is provided on the outer wall of the heating chamber, a limiting cylinder is provided on the support frame, the power unit is installed in the limiting cylinder through a guide bearing, the power unit extends out of the limiting cylinder and is installed with a transmission sprocket.

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