A plastic woven bag printing unwinding mechanism

Abstract

The application provides a plastic woven bag printing unwinding mechanism and relates to the woven bag production and processing technical field.The plastic woven bag printing unwinding mechanism comprises an operation table, a fixed support is fixedly installed on the top of the operation table, a limiting assembly, a supporting assembly and an unwinding assembly are sequentially arranged in the fixed support, and the unwinding assembly comprises a mounting seat fixedly connected to the top of the fixed support.The plastic woven bag printing unwinding mechanism supports the material roll through the supporting assembly, the material roll is mounted on the unwinding mechanism by making the two mounting sleeves approach the shafts at the two ends of the material roll, the mounting sleeves are sleeved on the shafts, the initial compression amount of the first baffle is adjusted by rotating the adjusting screw, the woven bag always keeps a taut state in the conveying process, the printing and processing quality is improved, and other tension adjusting mechanisms are not needed to be additionally installed, and the occupied space is reduced.

Description

Technical Field

[0001] This invention relates to the field of woven bag production and processing technology, specifically to an unwinding mechanism for printing on plastic woven bags. Background Technology

[0002] Plastic woven bags are widely used in the packaging of bulk commodities such as chemical raw materials, grains, fertilizers, and building materials due to their low cost, high strength, and good corrosion resistance. With increasing market demands for packaging aesthetics and brand recognition, printing on the surface of woven bags has become an indispensable part of the production process. On the printing production line, the unwinding mechanism, as the core equipment for conveying woven bag rolls, directly determines the registration accuracy, clarity, and overall production efficiency of the printed patterns.

[0003] Chinese Patent Publication No. CN223397162U discloses a printing device for woven bag production, which relates to the field of woven bag processing technology. In the existing printing device for woven bag production, the traction force acting on the woven bag changes when the woven bag is rolled up due to the mechanical structure of the device and human operation. When the traction force is large, it will cause the woven bag to deform or even break.

[0004] The aforementioned device presents a challenge in feeding materials due to the weight of the rolls. Furthermore, in the past, a complex tension control system was required to ensure the tension of the woven bags, which occupied a large amount of factory space and resulted in high maintenance costs. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides an unwinding mechanism for printing on plastic woven bags. This solves the problem of difficulty in unwinding the material roll due to its heavy weight, and also addresses the previous need for a complex tension control system to ensure the tension of the woven bags, which occupies a large factory space and incurs high maintenance costs.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: an unwinding mechanism for printing on plastic woven bags, comprising an operating table, a fixed bracket fixedly mounted on the top of the operating table, a limiting component, a support component, and an unwinding component sequentially arranged inside the fixed bracket, the unwinding component including a mounting seat fixedly connected to the top of the fixed bracket, a rotating sleeve rotatably connected inside the mounting seat via a bearing, an installation sleeve slidably connected inside the rotating sleeve, one end of the installation sleeve having a slot adapted to the material roll shaft, and a torque assembly on the mounting seat for controlling the rotational torque of the rotating sleeve. The torque assembly includes a mounting bracket fixedly connected to a mounting base, a connecting slide rod slidably connected to the mounting base, a rotating sleeve having an inclined groove on its outer surface inside the mounting base, one end of the connecting slide rod being located inside the mounting base, a first inclined insertion rod being fixedly connected to one end of the connecting slide rod, and one end of the first inclined insertion rod being inserted into the inclined groove, a first baffle plate being fixedly connected to the connecting slide rod, a first spring being connected to the top of the first baffle plate, an adjusting screw being threadedly connected to the mounting bracket, an inner sliding groove being formed at the bottom of the adjusting screw, and one end of the connecting slide rod sliding inside the inner sliding groove.

[0009] Preferably, the first spring is disposed between the first baffle and the adjusting screw, and the maximum diameter of the first spring is smaller than the maximum diameter of the adjusting screw and the first baffle. The first spring is sleeved on the outer surface of the connecting slide rod.

[0010] Preferably, the mounting sleeve is fixedly connected to a limiting strip, the limiting strip slides inside the rotating sleeve, and the rotating sleeve is provided with a fixing component to limit the sliding of the mounting sleeve. Under the action of the limiting strip, the mounting sleeve is driven to rotate together with the rotating sleeve during the rotation of the rotating sleeve.

[0011] Preferably, the fixing component includes a fixing support fixedly connected to the rotating sleeve, a second oblique insertion rod slidably connected inside the fixing support, a fixing slot is provided on the mounting sleeve, one end of the second oblique insertion rod is inserted into the inside of the fixing slot, and inserting one end of the second oblique insertion rod into the inside of the fixing slot restricts the horizontal sliding of the mounting sleeve inside the rotating sleeve.

[0012] Preferably, a second baffle is fixedly connected to the fixed support, and a second spring is fixedly connected to the second baffle. The second spring is sleeved on the outer surface of the second inclined insertion rod. Through the provided second spring, one end of the second inclined insertion rod is stably inserted into the inside of the fixed slot.

[0013] Preferably, the support assembly includes a lifting frame, with sliding blocks fixedly connected to both ends of the lifting frame. The two sliding blocks slide in the grooves on both sides of the fixed bracket, and two support rollers are rotatably connected inside the lifting frame to support the material roll.

[0014] Preferably, a lifting screw is rotatably connected in the side groove of the fixed bracket, and the sliding block is threadedly connected to the lifting screw. The sliding block is moved up and down in the groove by rotating the lifting screw.

[0015] Preferably, a base box is fixedly connected to the bottom of the operating platform, one end of the lifting screw extends into the interior of the base box, and a rotating rod is rotatably connected inside the base box. The rotating rod and the lifting screw are connected through a gear assembly. A motor for driving the rotating rod to rotate is fixedly connected to the base box. The rotating rod is driven to rotate by starting the motor, and the two lifting screws rotate synchronously and at the same speed under the action of the gear assembly.

[0016] Preferably, the limiting component includes a fixed seat fixedly connected to the bottom wall of the fixed bracket. Two movable rods are slidably connected inside the fixed seat. One end of each movable rod is fixedly connected to a limiting rod. A bidirectional screw is rotatably connected inside the fixed seat. Both limiting rods are threaded onto the bidirectional screw. The distance between the two limiting rods is adjusted by rotating the bidirectional screw.

[0017] (III) Beneficial Effects

[0018] This invention provides an unwinding mechanism for printing on plastic woven bags. It has the following advantages:

[0019] 1. This unwinding mechanism for printing on plastic woven bags supports the material roll via a support assembly. By pushing the slots at one end of the two mounting sleeves toward the rotating shafts at both ends of the material roll, the mounting sleeves are fitted onto the rotating shafts, thus mounting the material roll onto the unwinding mechanism. The woven bag is unwound by pulling it. As the rotating sleeve rotates, the inclined groove compresses the connecting slide rod, causing it to slide upwards. Under the action of the first spring force, the torque during the rotation of the rotating sleeve is increased. The initial compression of the first baffle is adjusted by rotating the adjusting screw, ensuring that the woven bag remains taut during transport. This improves the quality of the printing process and eliminates the need for additional tension adjustment mechanisms, reducing the footprint.

[0020] 2. The unwinding mechanism for printing plastic woven bags supports the material roll with a support roller. By controlling the two mounting sleeves to slide closer to each other and restricting them to move further apart under the action of the fixing component, the ease of unwinding the material roll is greatly improved. The output woven bags are also limited by the action of two limit rods to prevent deviation. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2This is a perspective view of the mounting base of the present invention;

[0023] Figure 3 This is a schematic diagram of the mounting base structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the fixed support structure of the present invention;

[0025] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0026] Figure 6 This is a schematic diagram of the bottom box structure of the present invention.

[0027] The components include: 1. Operating table; 2. Fixed bracket; 3. Mounting base; 4. Rotating sleeve; 41. Inclined groove; 5. Mounting sleeve; 51. Fixed slot; 6. Mounting frame; 61. Connecting slide rod; 62. First inclined insertion rod; 63. First baffle; 64. First spring; 65. Adjusting screw; 66. Inner slide groove; 7. Lifting frame; 71. Support roller; 72. Sliding block; 73. Lifting screw; 74. Base box; 75. Rotating rod; 76. Motor; 8. Fixed base; 81. Moving rod; 82. Limiting rod; 83. Bidirectional screw; 9. Fixed support; 91. Second inclined insertion rod; 92. Second baffle; 93. Second spring. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1:

[0030] This invention provides an unwinding mechanism for printing on plastic woven bags, such as... Figure 1-6 As shown, the system includes an operating table 1, with a fixed bracket 2 fixedly mounted on the top of the operating table 1. Inside the fixed bracket 2, a limiting component, a support component, and an unwinding component are arranged in sequence. The unwinding component includes a mounting base 3 fixedly connected to the top of the fixed bracket 2. Inside the mounting base 3, a rotating sleeve 4 is rotatably connected via a bearing. Inside the rotating sleeve 4, an installation sleeve 5 is slidably connected. One end of the installation sleeve 5 has a slot adapted to the material roll shaft. The slot is a circle with a groove. By inserting the material roll shaft into the slot, the protrusion on the material roll shaft is inserted into the groove, causing the rotating sleeve 4 to rotate together during the unwinding process. By sliding the two installation sleeves 5 closer to each other, the material roll roller is quickly installed in the middle of the unwinding mechanism.

[0031] Please refer to it again. Figure 1 , Figure 2 and Figure 3 The mounting base 3 is equipped with a torque assembly for controlling the rotation torque of the rotating sleeve 4. The torque assembly includes a mounting bracket 6 fixedly connected to the mounting base 3. A connecting slide rod 61 is slidably connected to the mounting base 3. The rotating sleeve 4 is located on the outer surface inside the mounting base 3 and has an inclined groove 41. One end of the connecting slide rod 61 is located inside the mounting base 3 and a first inclined insertion rod 62 is fixedly connected to the other end of the connecting slide rod 61. One end of the first inclined insertion rod 62 is inserted into the inclined groove 41. A first baffle 63 is fixedly connected to the connecting slide rod 61. A first spring 64 is connected to the top of the first baffle 63. The inclined surface at the bottom of the first inclined insertion rod 62 is parallel to the inclined surface of the inclined groove 41. When the rotating sleeve 4 rotates, it pushes the first inclined insertion rod 62 to rise, thereby compressing the first spring 64. Under the action of the elastic force of the first spring 64, the torque during the rotation of the rotating sleeve 4 is increased, keeping the woven bag taut during the feeding process and preventing excessive feeding.

[0032] Please refer to it again. Figure 1 , Figure 2 and Figure 3 An adjusting screw 65 is threaded onto the mounting bracket 6. The bottom of the adjusting screw 65 has an inner groove 66, and one end of the connecting slide rod 61 slides inside the inner groove 66. A first spring 64 is located between the first baffle 63 and the adjusting screw 65, and the maximum diameter of the first spring 64 is smaller than the maximum diameter of the adjusting screw 65 and the first baffle 63. The first spring 64 is sleeved on the outer surface of the connecting slide rod 61. The adjusting screw 65 blocks the other end of the first spring 64. By rotating the adjusting screw 65, the distance between the adjusting screw 65 and the first baffle 63 is adjusted, thereby adjusting the initial compression of the first spring 64. The adjustment is made according to the different toughness of the woven bags.

[0033] Example 2:

[0034] Please refer to it again. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The mounting sleeve 5 is fixedly connected to a limiting strip, which slides inside the rotating sleeve 4. Under the action of the limiting strip, the mounting sleeve 5 rotates, causing the rotating sleeve 4 to rotate together inside the mounting base 3. The rotating sleeve 4 is provided with a fixing component to limit the sliding of the mounting sleeve 5. The fixing component includes a fixing support 9 fixedly connected to the rotating sleeve 4. A second inclined insertion rod 91 is slidably connected inside the fixing support 9. The mounting sleeve 5 is provided with a fixing slot 51. One end of the second inclined insertion rod 91 is inserted into the fixing slot 51. When the mounting sleeve 5 slides closer to the center of the fixing bracket 2, the fixing slot 51 presses the inclined surface of the second inclined insertion rod 91 to push the second inclined insertion rod 91 to slide upward, thereby pushing the two mounting sleeves 5 closer to each other. The reverse sliding of the mounting sleeve 5 is limited when the plane of the second inclined insertion rod 91 abuts against the inner wall of the fixing slot 51.

[0035] Please refer to it again. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A second baffle 92 is fixedly connected to the fixed support 9, and a second spring 93 is fixedly connected to the second baffle 92. The second spring 93 is sleeved on the outer surface of the second oblique insertion rod 91. Under the action of the elastic force of the second spring 93, one end of the second oblique insertion rod 91 is stably inserted into the inside of the fixed slot 51, and when the installation sleeve 5 rotates, the centrifugal force will not cause one end of the second oblique insertion rod 91 to be pulled out from the inside of the fixed slot 51.

[0036] Example 3:

[0037] Please refer to it again. Figure 1 and Figure 6 The support assembly includes a lifting frame 7, with sliding blocks 72 fixedly connected to both ends of the lifting frame 7. The two sliding blocks 72 slide in the grooves on both sides of the fixed bracket 2. Two support rollers 71 are rotatably connected inside the lifting frame 7. A lifting screw 73 is rotatably connected in the groove on the side of the fixed bracket 2. The sliding blocks 72 are threaded onto the lifting screw 73. By placing the material roll on the support rollers 71, it is supported by the support rollers 71, which improves the convenience of installing and disassembling the material roll. The lifting frame 7 is adjusted by rotating the lifting screw 73.

[0038] Please refer to it again. Figure 1 and Figure 6A base box 74 is fixedly connected to the bottom of the operating platform 1. One end of the lifting screw 73 extends into the interior of the base box 74. A rotating rod 75 is rotatably connected inside the base box 74. The rotating rod 75 is connected to the lifting screw 73 through a gear assembly. A motor 76 that drives the rotating rod 75 to rotate is fixedly connected to the base box 74. The gear assembly includes a first bevel gear fixed on the base box 74 and a second bevel gear fixed at the bottom of the lifting screw 73. The first bevel gear and the second bevel gear mesh. The rotating rod 75 is driven to rotate by starting the motor 76. Under the action of the gear assembly, the two lifting screws 73 rotate synchronously and at the same speed.

[0039] Please refer to it again. Figure 1 and Figure 6 The limiting component includes a fixed seat 8 fixedly connected to the bottom wall of the fixed bracket 2. Two movable rods 81 are slidably connected inside the fixed seat 8. One end of each movable rod 81 is fixedly connected to a limiting rod 82. A bidirectional screw 83 is rotatably connected inside the fixed seat 8. Both limiting rods 82 are threadedly connected to the bidirectional screw 83. A first rotating rod is rotatably connected to the back of the fixed seat 8. The first rotating rod and the bidirectional screw 83 are meshed by gears to drive the bidirectional screw 83 to rotate inside the fixed seat 8. Alternatively, a motor-driven method can be used. The two limiting rods 82 are used to limit the woven bag. The bidirectional screw 83 is a screw with two external threads in opposite directions. By rotating the bidirectional screw 83, the two movable rods 81 are moved closer or further apart to adjust the distance between the two limiting rods 82.

[0040] Working principle:

[0041] The device is placed in a suitable position. The woven bag roll is placed on the support roller 71. The motor 76 is started to drive the rotating rod 75 to rotate. Under the action of the gear assembly, the two lifting screws 73 are driven to rotate together, which drives the lifting frame 7 to adjust the height. After the roll is raised to a suitable position, the mounting sleeve 5 is pushed towards the shaft of the roll and installed on the shaft. Under the action of the fixing component, the roll is installed in the middle of the unwinding component. The woven bag is unwound by pulling it. During the unwinding process, the mounting sleeve 5 is driven to rotate, thereby driving the rotating sleeve 4 to rotate. When the rotating sleeve 4 rotates, it squeezes the connecting slide rod 61 to slide upward through the inclined groove 41. Under the action of the first spring 64, the torque of the rotating sleeve 4 during rotation is increased. The initial compression of the first baffle 63 is adjusted by rotating the adjusting screw 65, so that the woven bag is always kept taut during the conveying process, which improves the processing quality of the woven bag.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An unwinding mechanism for printing on plastic woven bags, comprising an operating table (1), characterized in that: The top of the operating table (1) is fixedly installed with a fixed bracket (2). The fixed bracket (2) is sequentially provided with a limiting component, a support component and an unwinding component. The unwinding component includes a mounting seat (3) fixedly connected to the top of the fixed bracket (2). The mounting seat (3) is rotatably connected to a rotating sleeve (4) through a bearing. The rotating sleeve (4) is slidably connected to an installation sleeve (5). One end of the installation sleeve (5) is provided with a slot that is compatible with the material roll shaft. The mounting base (3) is provided with a torque assembly for controlling the rotation torque of the rotating sleeve (4). The torque assembly includes a mounting bracket (6) fixedly connected to the mounting base (3). A connecting slide rod (61) is slidably connected to the mounting base (3). An inclined groove (41) is opened on the outer surface of the rotating sleeve (4) inside the mounting base (3). One end of the connecting slide rod (61) is located inside the mounting base (3). A first inclined insertion rod (62) is fixedly connected to one end of the connecting slide rod (61), and one end of the first inclined insertion rod (62) is inserted into the inclined groove (41). A first baffle (63) is fixedly connected to the connecting slide rod (61). A first spring (64) is connected to the top of the first baffle (63). An adjusting screw (65) is threadedly connected to the mounting bracket (6). An inner sliding groove (66) is opened at the bottom of the adjusting screw (65), and one end of the connecting slide rod (61) slides inside the inner sliding groove (66).

2. The unwinding mechanism for printing on plastic woven bags according to claim 1, characterized in that: The first spring (64) is located between the first baffle (63) and the adjusting screw (65), and the maximum diameter of the first spring (64) is smaller than the maximum diameter of the adjusting screw (65) and the first baffle (63). The first spring (64) is sleeved on the outer surface of the connecting slide rod (61).

3. The unwinding mechanism for printing on plastic woven bags according to claim 1, characterized in that: The mounting sleeve (5) is fixedly connected to a limiting strip, which slides inside the rotating sleeve (4), and the rotating sleeve (4) is provided with a fixing component that restricts the sliding of the mounting sleeve (5).

4. The unwinding mechanism for printing on plastic woven bags according to claim 3, characterized in that: The fixing component includes a fixing support (9) fixedly connected to the rotating sleeve (4), and a second oblique insertion rod (91) is slidably connected inside the fixing support (9). A fixing slot (51) is provided on the mounting sleeve (5), and one end of the second oblique insertion rod (91) is inserted into the inside of the fixing slot (51).

5. The unwinding mechanism for printing on plastic woven bags according to claim 4, characterized in that: A second baffle (92) is fixedly connected to the fixed support (9), and a second spring (93) is fixedly connected to the second baffle (92). The second spring (93) is sleeved on the outer surface of the second oblique insert (91).

6. The unwinding mechanism for printing on plastic woven bags according to claim 1, characterized in that: The support assembly includes a lifting frame (7), and two sliding blocks (72) are fixedly connected to both ends of the lifting frame (7). The two sliding blocks (72) slide in the grooves on both sides of the fixed bracket (2). Two support rollers (71) are rotatably connected inside the lifting frame (7).

7. The unwinding mechanism for printing on plastic woven bags according to claim 6, characterized in that: The fixed bracket (2) has a lifting screw (73) rotatably connected in the side groove, and the sliding block (72) is threadedly connected to the lifting screw (73).

8. The unwinding mechanism for printing on plastic woven bags according to claim 7, characterized in that: The bottom of the operating platform (1) is fixedly connected to a base box (74). One end of the lifting screw (73) extends into the interior of the base box (74). A rotating rod (75) is rotatably connected inside the base box (74). The rotating rod (75) and the lifting screw (73) are connected by a gear assembly. A motor (76) that drives the rotating rod (75) to rotate is fixedly connected to the base box (74).

9. The unwinding mechanism for printing on plastic woven bags according to claim 1, characterized in that: The limiting component includes a fixed seat (8) fixedly connected to the inner bottom wall of the fixed bracket (2). The fixed seat (8) has two sliding rods (81) slidably connected inside. One end of each of the sliding rods (81) is fixedly connected to a limiting rod (82). The fixed seat (8) has a bidirectional screw (83) rotatably connected inside. Both limiting rods (82) are threaded onto the bidirectional screw (83).

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