A longitudinal stretching machine

Abstract

The utility model discloses a longitudinal stretching machine relates to polytetrafluoroethylene microporous membrane processing technical field, including equipment shell, rotate and install preheating roller in equipment shell, one side of preheating roller rotatory mounting has the stretching roller, one side of stretching roller rotatory mounting has the cooling roller, install the guide mechanism in equipment shell, the guide mechanism includes the guide sprocket rotatory mounting in equipment shell, and the guide sprocket with preheating roller, stretching roller and cooling roller one to one correspondence, equipment shell bottom position rotatory mounting has the transmission sprocket and the tension pulley, the guide sprocket, transmission sprocket and the tension pulley are connected with the guide chain on, fixed mounting has the compaction mechanism on the guide chain, the inboard rotatory mounting of equipment shell has the drive shaft. This longitudinal stretching machine, through the cooperation of compaction mechanism and guide mechanism, can draw the film to pass through preheating roller, stretching roller and cooling roller in proper order, and quickly completes the film work of leading.

Description

Technical Field

[0001] This utility model relates to the field of polytetrafluoroethylene microporous membrane processing technology, specifically a longitudinal stretching machine. Background Technology

[0002] A longitudinal stretching machine is a specialized piece of equipment used for material processing. It achieves directional stretching of materials such as plastic films, metal foils, and fibers by applying controllable tensile force along the length of the material. Its core structure includes a preheating roller, a stretching unit (multi-roller differential speed or clamp track type), a heat setting zone, and a winding device.

[0003] In the prior art, patent announcement number CN214521930U discloses a longitudinal stretching machine for polyester optical films, relating to the field of polyester optical film technology. This utility model includes a machine body, with an inlet roller, multiple preheating rollers, multiple stretching rollers, a cooling roller, a tension roller, a flattening roller, and an outlet pressure roller sequentially rotatably fitted from one end to the other on the upper part of the machine body.

[0004] In the process of stretching polytetrafluoroethylene (PTFE) microporous membranes using a longitudinal stretching machine, the film must first be precisely guided through multiple preheating rollers, stretching rollers, and cooling rollers in sequence. Specifically, the film must pass through each set of preheating rollers in a specific order and path for initial heating, then enter the stretching roller area for longitudinal stretching, and finally pass through the cooling rollers for cooling and shaping. However, the longitudinal stretching machine has a complex structure with a large number of preheating rollers, stretching rollers, and cooling rollers, which significantly increases the difficulty of guiding the film smoothly and accurately through these rollers. Operators need to possess a high level of professional skill and meticulous operating techniques to guide the film through each roller. Therefore, a longitudinal stretching machine is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a longitudinal stretching machine to solve the problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a longitudinal stretching machine, comprising a housing, a preheating roller rotatably mounted inside the housing, a stretching roller rotatably mounted on one side of the preheating roller, a cooling roller rotatably mounted on one side of the stretching roller, a guide mechanism mounted inside the housing, the guide mechanism comprising a guide sprocket rotatably mounted inside the housing, and the guide sprocket corresponding one-to-one with the preheating roller, the stretching roller, and the cooling roller, a transmission sprocket and a tensioning roller rotatably mounted at the bottom of the housing, a guide chain connected to the guide sprocket, the transmission sprocket, and the tensioning roller, and a pressing mechanism fixedly mounted on the guide chain.

[0007] Preferably, a drive shaft is rotatably mounted inside the device housing, and a transmission sprocket is fixedly mounted on the drive shaft. A first motor is fixedly mounted on the outer wall of the device housing. A small gear is fixedly mounted at the output end of the first motor. One end of the drive shaft is fixedly mounted on a large gear, and the large gear and the small gear mesh together.

[0008] Preferably, a bearing is installed on the equipment housing, the drive shaft bearing is rotatably installed inside the equipment housing, and a cutting mechanism is fixedly installed at the end of the equipment housing. The cutting mechanism includes a mechanism housing fixedly installed at the end of the equipment housing, a second motor is fixedly installed at one end of the mechanism housing, a drive screw is fixedly installed at the output end of the second motor, a screw nut is threaded onto the drive screw, and a cutting blade is fixedly installed on the screw nut. A movable groove is provided on the side wall of the mechanism housing, and the cutting blade extends out of the mechanism housing through the movable groove.

[0009] Preferably, the transmission sprocket is rotatably mounted inside the equipment housing via a drive shaft, the guide chain is movably mounted inside the equipment housing via the cooperation of the guide sprocket, the transmission sprocket, and the tensioning wheel, and the pinion is rotatably mounted inside the equipment housing via a first motor.

[0010] Preferably, the clamping mechanism includes a clamping seat fixedly mounted on the guide sprocket, the clamping seat having a threaded hole, a threaded rod being threadedly installed in the threaded hole, a pressure block being movably installed inside the clamping seat, a rotary connector being installed on the pressure block, and the threaded rod being connected to the rotary connector, and anti-slip pads being installed on both the pressure block and the clamping seat.

[0011] Preferably, the anti-slip mat is coated with adhesive, and the anti-slip mat is fixed to the pressure block and the clamping seat respectively by the adhesive.

[0012] Preferably, the threaded rod is connected to the clamping seat through a threaded hole, the lower end of the threaded rod is rotatably mounted on the pressure block through a rotary connector, and the pressure block is movably mounted in the clamping seat through the threaded rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In this application, one end of the film can be placed inside the pressure seat. After one end of the film is placed inside the pressure seat, the threaded rod can be rotated downwards. After rotating the threaded rod downwards, it will drive the pressure block to move downwards. After the pressure block moves downwards, it will fix one end of the film inside the pressure seat, thereby positioning one end of the film on the guide chain to facilitate guiding the film through each roller.

[0015] 2. In this application, after the first motor starts, it drives the small gear to rotate. The rotation of the small gear then drives the large gear to rotate. The rotation of the large gear drives the drive shaft to rotate. The rotation of the drive shaft causes the transmission sprocket to rotate. The rotation of the transmission sprocket causes the guide chain to start running. The operation of the guide chain drives the pressing mechanism to move around the preheating roller, stretching roller and cooling roller in sequence, thereby pulling the film through the preheating roller, stretching roller and cooling roller in sequence to quickly realize the film pulling operation.

[0016] 3. In this application, after the film has passed smoothly through each roller, the second motor can be started. After the second motor is started, it will drive the drive screw to rotate. The rotation of the drive screw will drive the screw nut to move forward. The forward movement of the screw nut will cause the cutting blade to move forward. The cutting blade will cut the film while it is moving forward, so as to remove the end of the film and facilitate the winding of the film. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a partial structural schematic diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the guiding mechanism of this utility model;

[0020] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is a schematic diagram of the clamping mechanism of this utility model;

[0022] Figure 6 This is a schematic diagram of the cutting mechanism of this utility model.

[0023] The diagram shows the following markings: 1. Equipment housing; 2. Preheating roller; 3. Stretching roller; 4. Cooling roller; 5. Guide mechanism; 501. Guide sprocket; 502. Guide chain; 503. Drive shaft; 504. Transmission sprocket; 505. Large gear; 506. First motor; 507. Small gear; 508. Tensioning wheel; 6. Pressing mechanism; 601. Pressing seat; 602. Threaded rod; 603. Threaded hole; 604. Rotary connector; 605. Pressure block; 606. Anti-slip pad; 7. Chain slide groove; 8. Cutting mechanism; 801. Mechanism housing; 802. Movable slide groove; 803. Cutting blade; 804. Drive screw; 805. Screw nut; 806. Second motor. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1 and Figure 2 As shown, this utility model provides a technical solution for a longitudinal stretching machine, including a housing 1, a preheating roller 2 rotatably mounted inside the housing 1, a stretching roller 3 rotatably mounted on one side of the preheating roller 2, a cooling roller 4 rotatably mounted on one side of the stretching roller 3, a guiding mechanism 5 installed inside the housing 1, a pressing mechanism 6 fixedly mounted on the guide chain 502, and a chain groove 7 fixedly mounted on the inner wall of the housing 1. The chain groove 7 can restrict the lateral movement of the guide chain 502, so that the guide chain 502 and the guide sprocket 501 are stably connected. Through the cooperation of the pressing mechanism 6 and the guiding mechanism 5, the film can be pulled sequentially through the preheating roller 2, the stretching roller 3 and the cooling roller 4 to quickly complete the film pulling work.

[0026] like Figure 2 and Figure 3 As shown, the guiding mechanism 5 includes a guide sprocket 501 rotatably mounted inside the equipment housing 1, and the guide sprocket 501 corresponds one-to-one with the preheating roller 2, the stretching roller 3, and the cooling roller 4. A transmission sprocket 504 and a tensioning roller 508 are rotatably mounted at the bottom of the equipment housing 1. A guide chain 502 is connected to the guide sprocket 501, the transmission sprocket 504, and the tensioning roller 508. A drive shaft 503 is rotatably mounted inside the equipment housing 1, and the transmission sprocket 504 is fixedly mounted on the drive shaft 503. A first motor 506 is fixedly mounted on the outer wall of the equipment housing 1. A pinion 507 is fixedly mounted at the output end of the first motor 506. One end of the drive shaft 503 is fixedly mounted on a large gear 505, and the large gear 505 and the pinion 507 mesh together. A bearing is mounted on the equipment housing 1, and the bearing of the drive shaft 503 is rotatably mounted inside the equipment housing 1.

[0027] Specifically, after the first motor 506 is started, it drives the pinion 507 to rotate. During rotation, the pinion 507 transmits power to the large gear 505 through gear meshing. The large gear 505, due to its larger number of teeth, rotates at a relatively slower speed but has a larger torque; its rotation drives the connected drive shaft 503 to rotate as well. The rotational motion of the drive shaft 503 is further transmitted to the transmission sprocket 504. During rotation, the transmission sprocket 504, through the transmission of the chain, drives the guide chain 502 to start running. During operation, the guide chain 502 drives one side of the pressing mechanism 6 to move along a preset track around the preheating roller 2, the stretching roller 3, and the cooling roller 4. During its movement, the pressing mechanism 6 pulls the film through the preheating roller 2, stretching roller 3 and cooling roller 4 in sequence, thereby completing the entire film pulling process quickly and efficiently. A tensioning device is installed on the tensioning wheel 508. The main function of this device is to provide stable and moderate tension so that the guide chain 502 can be firmly tightened, thereby ensuring that it maintains a tight fit with the guide sprocket 501.

[0028] like Figure 4 and Figure 5 As shown, the clamping mechanism 6 includes a clamping seat 601 fixedly mounted on the guide sprocket 501. The clamping seat 601 has a threaded hole 603, and a threaded rod 602 is threadedly installed in the threaded hole 603. A pressure block 605 is movably installed in the clamping seat 601. A rotary connector 604 is installed on the pressure block 605, and the threaded rod 602 is connected to the rotary connector 604. Anti-slip pads 606 are installed on both the pressure block 605 and the clamping seat 601. The anti-slip pads 606 are coated with glue and are fixed to the pressure block 605 and the clamping seat 601 respectively by glue. The threaded rod 602 is connected to the clamping seat 601 through the threaded hole 603, and the lower end of the threaded rod 602 is rotatably mounted on the pressure block 605 through the rotary connector 604.

[0029] Specifically, one end of the film can be placed inside the pressing seat 601. Once the film end is successfully positioned, the threaded rod 602 can be manually rotated downwards. During this downward rotation, the threaded rod 602, through its threaded structure connected to the pressure block 605, causes the pressure block 605 to move downwards as well. As the pressure block 605 moves downwards, it gradually applies pressure to one end of the film, ultimately securing it firmly inside the pressing seat 601. This ensures that one end of the film is precisely positioned on the guide chain 502, facilitating subsequent processes and allowing the film to smoothly pass through the rollers, ensuring the smooth operation of the entire production process.

[0030] like Figure 2 and Figure 6As shown, a cutting mechanism 8 is fixedly installed at the end of the equipment housing 1. The cutting mechanism 8 includes a mechanism housing 801 fixedly installed at the end of the equipment housing 1. A second motor 806 is fixedly installed at one end of the mechanism housing 801. A drive screw 804 is fixedly installed at the output end of the second motor 806. A screw nut 805 is threaded on the drive screw 804. A cutting blade 803 is fixedly installed on the screw nut 805. A movable slide groove 802 is provided on the side wall of the mechanism housing 801, and the cutting blade 803 extends out of the mechanism housing 801 through the movable slide groove 802.

[0031] Specifically, once the film has smoothly passed through the rollers, the second motor 806 can be activated. Once activated, the second motor 806 quickly enters its working state, driving the connected drive screw 804 to rotate. During rotation, the drive screw 804, through the engagement of its threads, gradually pushes the screw nut 805 forward. As the screw nut 805 moves forward, the connected cutting blade 803 also moves forward. Upon reaching the predetermined position, the forward-moving cutting blade 803 precisely cuts the film, allowing the operator to easily remove the end portion of the film. After cutting and removing the film end, subsequent winding processing of the film becomes easier.

[0032] Working principle: Before stretching the film, one end of the film is first placed in the pressure seat 601. After the film end is placed in the pressure seat 601, the threaded rod 602 can be rotated downward. After the threaded rod 602 is rotated downward, it will drive the pressure block 605 to move downward. After the pressure block 605 moves downward, it will fix one end of the film in the pressure seat 601, thereby positioning one end of the film on the guide chain 502, which facilitates guiding the film through each roller. After one end of the film is positioned on the guide chain 502, the first motor 506 can be started. After the first motor 506 is started, it will drive the pinion 507 to rotate. After the pinion 507 rotates, it will drive the large gear 505 to rotate. After the large gear 505 rotates, it will drive the drive shaft 503 to rotate. After the drive shaft 503 rotates, it will drive the transmission sprocket 504 to rotate. After the transmission sprocket 504 rotates, it will drive the guide chain 502 to rotate. After the guide chain 502 rotates, it will drive the pressing mechanism 6 to move around the preheating roller 2, stretching roller 3 and cooling roller 4, thereby pulling the film through the preheating roller 2, stretching roller 3 and cooling roller 4 in sequence, and quickly completing the film pulling work.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A longitudinal stretching machine, comprising a housing (1), wherein a preheating roller (2) is rotatably mounted inside the housing (1), a stretching roller (3) is rotatably mounted on one side of the preheating roller (2), a cooling roller (4) is rotatably mounted on one side of the stretching roller (3), and a chain groove (7) is fixedly mounted on the inner wall of the housing (1), characterized in that: A guide mechanism (5) is installed inside the equipment housing (1). The guide mechanism (5) includes a guide sprocket (501) rotatably installed inside the equipment housing (1). The guide sprocket (501) corresponds one-to-one with the preheating roller (2), the stretching roller (3), and the cooling roller (4). A transmission sprocket (504) and a tensioning roller (508) are rotatably installed at the bottom of the equipment housing (1). A guide chain (502) is connected to the guide sprocket (501), the transmission sprocket (504), and the tensioning roller (508). A pressing mechanism (6) is fixedly installed on the guide chain (502).

2. The longitudinal stretching machine according to claim 1, characterized in that: A drive shaft (503) is rotatably mounted on the inner side of the equipment housing (1), and a transmission sprocket (504) is fixedly mounted on the drive shaft (503). A first motor (506) is fixedly mounted on the outer wall of the equipment housing (1). A small gear (507) is fixedly mounted on the output end of the first motor (506). One end of the drive shaft (503) is fixedly mounted on a large gear (505), and the large gear (505) meshes with the small gear (507).

3. A longitudinal stretching machine according to claim 2, characterized in that: The equipment housing (1) is equipped with a bearing, and the drive shaft (503) is rotatably mounted on the inner side of the equipment housing (1). A cutting mechanism (8) is fixedly mounted at the end of the equipment housing (1). The cutting mechanism (8) includes a mechanism housing (801) fixedly mounted at the end of the equipment housing (1). A second motor (806) is fixedly mounted at one end of the mechanism housing (801). A drive screw (804) is fixedly mounted at the output end of the second motor (806). A screw nut (805) is threaded onto the drive screw (804). A cutting blade (803) is fixedly mounted on the screw nut (805). A movable slide groove (802) is provided on the side wall of the mechanism housing (801), and the cutting blade (803) extends out of the mechanism housing (801) through the movable slide groove (802).

4. A longitudinal stretching machine according to claim 3, characterized in that: The transmission sprocket (504) is rotatably mounted inside the equipment housing (1) via the drive shaft (503). The guide chain (502) is movably mounted inside the equipment housing (1) through the cooperation of the guide sprocket (501), the transmission sprocket (504) and the tension wheel (508). The pinion (507) is rotatably mounted inside the equipment housing (1) via the first motor (506).

5. A longitudinal stretching machine according to claim 4, characterized in that: The clamping mechanism (6) includes a clamping seat (601) fixedly installed on the guide sprocket (501). The clamping seat (601) has a threaded hole (603). A threaded rod (602) is threadedly installed in the threaded hole (603). A pressure block (605) is movably installed in the clamping seat (601). A rotary connector (604) is installed on the pressure block (605), and the threaded rod (602) is connected to the rotary connector (604). Anti-slip pads (606) are installed on both the pressure block (605) and the clamping seat (601).

6. A longitudinal stretching machine according to claim 5, characterized in that: The anti-slip pad (606) is coated with glue, and the anti-slip pad (606) is fixed to the pressure block (605) and the pressing seat (601) respectively by the glue.

7. A longitudinal stretching machine according to claim 6, characterized in that: The threaded rod (602) is connected to the clamping seat (601) through the threaded hole (603). The lower end of the threaded rod (602) is rotatably mounted on the pressure block (605) through the rotary connector (604). The pressure block (605) is movably mounted in the clamping seat (601) through the threaded rod (602).

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