A blown film device for membrane production and processing

Abstract

This utility model belongs to the technical field of plastic film production equipment, specifically relating to a blown film device for film production and processing. It includes a base with two symmetrically arranged movable frames slidably connected to its top. Each movable frame has a sliding part with a convex vertical cross-section at its bottom end. Both sliding parts are slidably connected to a sliding groove at the top of the base, and the same bidirectional lead screw is threaded onto both sliding parts. In this blown film device, when the drive motor is started, the blown film produced is wound up. When the winding drum reaches a certain diameter, it presses down on the first and second inclined plates, causing the gears and toothed plates connected to the rotating shaft to move downwards via the movable inner rod. This causes the spring to be slowly compressed and deformed. Furthermore, the transmission columns move downwards in the transmission channel, and the design of the transmission channel ensures that the toothed plates, after moving downwards to a certain height, move horizontally away from the L-shaped buffer seat within the guide sleeve.

Description

Technical Field

[0001] This utility model belongs to the technical field of plastic film production equipment, specifically relating to a blown film device for film production and processing. Background Technology

[0002] As a key piece of equipment in plastic film production, the blown film machine works by heating and melting plastic particles, then extruding them through a die to form a tubular preform. This preform is then inflated by high-pressure air, cooled, and shaped to form the final film product. In the film production process, the winding process is a crucial step affecting production efficiency. While most blown film devices on the market can automatically wind up the film, significant technical deficiencies remain in the unloading stage.

[0003] Traditional blown film unloading equipment relies primarily on manual operation. When the film on the take-up roll reaches a certain diameter or weight, the operator must manually stop the equipment, cut the film, and then unload the take-up roll and replace it with an empty roll. This manual unloading method presents the following technical problems:

[0004] High labor intensity and low unloading efficiency: Since the film rolls after winding are usually quite heavy, manual handling and unloading require high physical strength from the operators, which not only increases labor intensity and reduces unloading efficiency, but also poses certain safety hazards.

[0005] To address the aforementioned issues, the existing technology has not yet provided a blown film device for membrane production and processing.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] The purpose of this invention is to provide a blown film device for film production and processing to solve the problems of the prior art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A blown film production and processing device includes a base, with two symmetrically arranged movable frames slidably connected to the top of the base. Each movable frame has a sliding part with a convex vertical cross-section at its bottom end. Both sliding parts are slidably connected to a sliding groove at the top of the base. A single bidirectional lead screw is threaded onto each sliding part, with both ends rotatably connected to the sliding groove. One end of the bidirectional lead screw extends to the outside of the base and is fixedly connected to a handwheel. Clamping discs are rotatably connected to each movable frame near its top end via a connecting shaft. A positioning block with a square vertical cross-section is fixedly connected to one opposite end of each clamping disc. Both positioning blocks are inserted into positioning grooves at both ends of a winding drum. The clamping discs are used to clamp the winding drum. One end of a connecting shaft, away from the clamping disc, extends to the outside of the movable frame and is connected to the output end of a drive motor. The drive motor is fixed to the outer wall of the movable frame. A buffer assembly is installed at one end of the base. A downward-pressing automatic tilting unloading assembly is installed at the top of the base.

[0010] Preferably, the pressure-type automatic tilting unloading assembly includes a first tilting plate movably disposed below the winding drum. The bottom end of the first tilting plate is fixedly connected to two symmetrically arranged connecting seats. A rotating shaft is rotatably connected to each of the two connecting seats. The same second tilting plate is fixedly connected to the outer side of the two rotating shafts. The second tilting plate and the first tilting plate are in a V-shape. The bottom end of the second tilting plate is provided with a groove that cooperates with the connecting seat.

[0011] Preferably, two symmetrically arranged movable inner rods are fixedly connected to the bottom inclined wall of the first inclined plate. The bottom ends of the movable inner rods are movably inserted into the movable channel opened inside the fixed outer rod. The bottom ends of the fixed outer rods are fixedly connected to the top of the base. A spring is fixed between the bottom ends of the movable inner rods and the inner bottom wall of the movable channel. The spring is made of carbon steel.

[0012] Preferably, the ends of the two rotating shafts that are far apart extend to the outside of the second inclined plate and are fixedly connected to gears. The gears are meshed with toothed plates below them. The outer sides of the toothed plates are movably fitted with guide sleeves, and one end of each guide sleeve is fixedly connected to the outer wall of the movable inner rod.

[0013] Preferably, a transmission column is fixedly connected to one end of each of the two gear plates away from the gear, and one end of each transmission column is movably connected to a transmission channel opened on the transmission plate. The transmission plate is fixed to the top of the base, and the vertical cross-section of the transmission channel is Z-shaped, with the inner width of the transmission channel being equal to the diameter of the transmission column.

[0014] Preferably, the buffer assembly includes an L-shaped buffer seat fixedly attached to one side wall of the base near the second inclined plate, a plurality of first speed bumps are fixedly attached to the horizontal inner bottom wall of the L-shaped buffer seat, and a plurality of second speed bumps are fixedly attached to the vertical inner bottom wall of the L-shaped buffer seat.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The blown film device for film production and processing of this utility model starts the drive motor and winds up the film produced during blown film production. When the film is wound up to a certain diameter with the winding drum, the first and second inclined plates are pressed down, so that the gears and toothed plates connected to the rotating shafts move down through the movable inner rods, and the springs are slowly compressed and deformed. In addition, the transmission columns move down in the transmission channel, and in accordance with the shape design of the transmission channel, the toothed plates move horizontally away from the L-shaped buffer seat in the guide sleeve after moving down a certain height, and drive the gears, so that the second inclined plate enters through the two rotating shafts. The first and second inclined plates are flipped so that their inclinations are the same. Then, the double-ended screw is rotated by the handwheel, which causes the positioning blocks, which are fixed to one end of the two clamping discs, to be pulled out of the positioning slots of the take-up drum. This causes the take-up drum to fall and roll along with the first and second inclined plates. Multiple first speed bumps slow down the fall of the take-up drum, and multiple second speed bumps prevent the take-up drum from colliding. This effectively protects the film on the take-up drum from damage and deformation, while also greatly improving the unloading efficiency of the blown film device and significantly reducing the labor intensity of manual unloading. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram of the overall planar unfolded structure of this utility model;

[0019] Figure 3 This is an enlarged structural diagram of point A of this utility model;

[0020] Figure 4 This is an enlarged structural diagram of point B of this utility model;

[0021] Explanation of key figure labels:

[0022] 1. Base; 11. Movable frame; 12. Bidirectional lead screw; 13. Clamping plate; 131. Positioning block; 14. Drive motor; 2. Rewind drum; 3. L-shaped buffer seat; 31. First speed reduction belt; 32. Second speed reduction belt; 4. Downward-pressing automatic tilting unloading assembly; 41. First tilting plate; 42. Movable inner rod; 43. Spring; 44. Fixed outer rod; 45. Connecting seat; 46. Rotating shaft; 47. Second tilting plate; 48. Groove; 49. Gear; 410. Tooth plate; 411. Guide sleeve; 412. Transmission column; 413. Transmission plate; 414. Transmission channel. Detailed Implementation

[0023] The technical solution of this utility model patent will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] High labor intensity and low unloading efficiency: Since the film rolls after winding are usually quite heavy, manual handling and unloading require high physical strength from the operators, which not only increases labor intensity and reduces unloading efficiency, but also poses certain safety hazards.

[0027] See attached document Figure 1-4A blown film production and processing device includes a base 1. Two symmetrically arranged movable frames 11 are slidably connected to the top of the base 1. Each movable frame 11 has a sliding part with a convex vertical cross-section at its bottom end. Both sliding parts are slidably connected to a sliding groove at the top of the base 1. The two sliding parts are threaded with the same bidirectional lead screw 12. Both ends of the bidirectional lead screw 12 are rotatably connected to the sliding groove, with one end extending to the outside of the base 1 and fixed with a handwheel. Clamping discs 13 are rotatably connected to the two movable frames 11 near their top ends via connecting shafts. Each of the two holding discs 13 has a vertically square-section positioning block 131 fixedly attached to one end of each of the opposite sides. Both positioning blocks 131 are inserted into the positioning slots opened at both ends of the take-up drum 2. The two clamping discs 13 are used to clamp the take-up drum 2. One end of the connecting shaft away from the clamping disc 13 extends to the outside of the moving frame 11 and is connected to the output end of the drive motor 14. The drive motor 14 is fixedly attached to the outer wall of the moving frame 11. A buffer assembly is installed at one end of the base 1. The pressure-type automatic tilting unloading assembly 4 is installed at the top of the base 1.

[0028] Furthermore, such as Figure 1-4 As shown, the downward-pressing automatic tilting unloading assembly 4 includes a first tilting plate 41 movably disposed below the winding drum 2. Two symmetrically arranged connecting seats 45 are fixedly connected to the bottom end of the first tilting plate 41. A rotating shaft 46 is rotatably connected to each of the two connecting seats 45. A second tilting plate 47 is fixedly connected to the outer side of each of the two rotating shafts 46. The second tilting plate 47 and the first tilting plate 41 are in a V-shape. A groove 48 that mates with the connecting seat 45 is provided at the bottom end of each of the second tilting plates 47. Two symmetrically arranged movable inner rods 42 are fixedly disposed on the inclined wall at the bottom end of the first tilting plate 41. The bottom ends of the movable inner rods 42 are movably inserted into the movable channels opened inside the fixed outer rods 44. The bottom ends of the fixed outer rods 44 are fixedly connected to the top end of the base 1. A spring 43 is fixedly connected to the inner bottom wall of the movable channel. The spring 43 is made of carbon steel. The ends of the two rotating shafts 46 that are far apart extend to the outer side of the second inclined plate 47 and are fixedly connected to gears 49. The gears 49 are meshed with toothed plates 410 below each gear. The outer side of each toothed plate 410 is movably fitted with a guide sleeve 411. One end of each guide sleeve 411 is fixedly connected to the outer side wall of the movable inner rod 42. The ends of the two toothed plates 410 that are far away from the gears 49 are fixedly connected to transmission columns 412. One end of each transmission column 412 is movably connected to the transmission channel 414 opened on the transmission plate 413. The transmission plate 413 is fixedly connected to the top of the base 1. The vertical section of the transmission channel 414 is Z-shaped. The inner width of the transmission channel 414 is equal to the diameter of the transmission column 412.

[0029] In the initial state, the first inclined plate 41 and the second inclined plate 47 have a V-shaped structure. When the winding drum 2 is wound to a certain diameter, it will slowly press against the first inclined plate 41 and the second inclined plate 47 and move downward. After being wound to a certain size, the second inclined plate 47 will change to the inclined state of the first inclined plate 41.

[0030] The inner width of the transmission channel 414 is equal to the diameter of the transmission column 412 in order to prevent the toothed plate 410 from moving back and forth within the guide sleeve 411.

[0031] The carbon steel spring 43 features good elastic stability and a long service life.

[0032] Furthermore, such as Figure 1-4 As shown, in order to cushion and protect the rolling take-up drum 2, a buffer assembly is provided, including an L-shaped buffer seat 3 fixedly attached to one side wall of the base 1 near the second inclined plate 47. Multiple first deceleration bands 31 are fixedly attached to the horizontal inner bottom wall of the L-shaped buffer seat 3 at equal intervals, and multiple second deceleration bands 32 are fixedly attached to the vertical inner bottom wall of the L-shaped buffer seat 3 at equal intervals.

[0033] Both the first speed bump 31 and the second speed bump 32 are made of rubber.

[0034] In actual use, when the drive motor 14 is started, the film produced during blown film production is wound up. When the winding drum 2 is wound to a certain diameter, the first inclined plate 41 and the second inclined plate 47 are pressed down. This causes the gear 49 and the toothed plate 410 connected to the rotating shaft 46 to move down through the movable inner rod 42, and the spring 43 is slowly compressed and deformed. In addition, the transmission column 412 moves down in the transmission channel 414. With the shape design of the transmission channel 414, the toothed plate 410 moves horizontally away from the L-shaped buffer seat 3 in the guide sleeve 411 after moving down a certain height, and drives the gear 49. This causes the second inclined plate 47 to move down through the two rotating shafts 411. 6. The device is flipped so that the second inclined plate 47 is inclined at the same degree as the first inclined plate 41. Then, the handwheel is used to rotate the bidirectional screw, so that the positioning blocks 131, which are fixed to one end of the two clamping discs 13, are pulled out from the positioning slots of the take-up drum 2. The take-up drum 2 will fall and roll with the first inclined plate 41 and the second inclined plate 47. Multiple first deceleration belts 31 can slow down the fall of the take-up drum 2, and multiple second deceleration belts 32 can prevent the take-up drum 2 from being damaged or deformed. This not only effectively protects the film on the take-up drum 2 from damage, but also greatly improves the unloading of the blown film device and greatly reduces the labor intensity of manual unloading.

[0035] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A blown film device for film production and processing, comprising a base (1), two symmetrically arranged movable frames (11) are slidably connected to the top of the base (1), and the bottom of each of the two movable frames (11) is provided with a sliding part with a convex vertical cross section. The two sliding parts are slidably connected to a sliding groove opened at the top of the base (1), and the same bidirectional screw (12) is threaded onto the two sliding parts. The two ends of the bidirectional screw (12) are rotatably connected to the sliding groove, and one end extends to the outside of the base (1) and is fixedly connected with a handwheel. The two movable frames (11) are positioned near the top. Each of the two clamping discs (13) is rotatably connected to a connecting shaft. A positioning block (131) with a vertical cross-section square structure is fixed to one end of each clamping disc (13). Both positioning blocks (131) are inserted into positioning slots at both ends of the take-up drum (2). The two clamping discs (13) are used to clamp the take-up drum (2). One end of the connecting shaft, away from the clamping disc (13), extends to the outside of the moving frame (11) and is connected to the output end of the drive motor (14). The drive motor (14) is fixed to the outer wall of the moving frame (11). The feature is that… A buffer assembly is installed at one end of the base (1); A pressure-type automatic tilting unloading assembly (4) is installed on the top of the base (1).

2. The film blowing device for film production and processing according to claim 1, characterized in that, The pressing-type automatic tilting unloading assembly (4) includes a first tilting plate (41) movably disposed below the winding drum (2). The bottom end of the first tilting plate (41) is fixedly connected to two symmetrically arranged connecting seats (45). A rotating shaft (46) is rotatably connected to each of the two connecting seats (45). The same second tilting plate (47) is fixedly connected to the outside of the two rotating shafts (46). The second tilting plate (47) and the first tilting plate (41) are in a V-shape. The bottom end of the second tilting plate (47) is provided with a groove (48) that cooperates with the connecting seat (45).

3. The film blowing device for film production and processing according to claim 2, characterized in that, Two symmetrically arranged movable inner rods (42) are fixedly connected to the bottom inclined wall of the first inclined plate (41). The bottom ends of the movable inner rods (42) are movably inserted into the movable channel opened inside the fixed outer rod (44). The bottom ends of the fixed outer rod (44) are fixedly connected to the top of the base (1). The bottom ends of the movable inner rods (42) are fixedly connected to the inner bottom wall of the movable channel with springs (43). The springs (43) are made of carbon steel.

4. The film blowing device for film production and processing according to claim 3, characterized in that, The two rotating shafts (46) extend to the outer side of the second inclined plate (47) at opposite ends and are fixedly connected to gears (49). Gear plates (410) are meshed and connected below the gears (49). Guide sleeves (411) are movably sleeved on the outer side of the gear plates (410). One end of the guide sleeves (411) is fixedly connected to the outer wall of the movable inner rod (42).

5. The film blowing device for film production and processing according to claim 4, characterized in that, A transmission column (412) is fixedly connected to one end of each of the two toothed plates (410) away from the gear (49). One end of each transmission column (412) is movably connected to a transmission channel (414) opened on the transmission plate (413). The transmission plate (413) is fixedly connected to the top of the base (1). The vertical cross section of the transmission channel (414) is Z-shaped. The inner width of the transmission channel (414) is equal to the diameter of the transmission column (412).

6. The film blowing device for film production and processing according to claim 2, characterized in that, The buffer assembly includes an L-shaped buffer seat (3) fixedly attached to one side wall of the base (1) near the second inclined plate (47). A plurality of first deceleration strips (31) are fixedly attached to the horizontal inner bottom wall of the L-shaped buffer seat (3), and a plurality of second deceleration strips (32) are fixedly attached to the vertical inner bottom wall of the L-shaped buffer seat (3).

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