A plastic package tearing mechanism

Abstract

The utility model provides a kind of plastic packaging bag tearing mechanism, including hopper, mounting bracket, distance adjusting mechanism, multiple blades and turnover mechanism, wherein, mounting bracket is installed on the upper portion of hopper;Distance adjusting mechanism is set on mounting bracket, and distance adjusting mechanism includes transmission part, multiple connecting plates and driving part, wherein, transmission part is set in mounting bracket interior;Multiple connecting plates are connected with transmission part respectively, and every connecting plate front end is all provided with clamping groove;Driving part is installed in one side of mounting bracket exterior;Multiple blades are respectively set in corresponding clamping groove interior;Turnover mechanism is set between mounting bracket and connecting plate and blade.The plastic packaging bag tearing mechanism of the utility model embodiment, by the cutting array of multiple groups of blades can simultaneously draw multiple, large-area opening in the bottom of packaging bag, greatly increase the outflow area of material, improve material flow rate, significantly improve discharging efficiency.

Description

Technical Field

[0001] This utility model relates to the field of unpacking machine technology, and in particular to a plastic packaging bag tearing mechanism. Background Technology

[0002] Robots are commonly used on automated production lines in industries such as food, chemicals, and pharmaceuticals to automatically unpack and feed bagged powdery and granular materials.

[0003] Currently, the mainstream automated unpacking method involves a robotic arm grabbing the packaging bag and moving it above a fixed hopper. A sharp object (such as a blade) fixed to the hopper is used to cut the bottom of the packaging bag, allowing the material to fall into the hopper under gravity, thus completing the unpacking and unloading. However, existing devices typically only have a single blade above the hopper. The limited size of the single blade results in a narrow material flow channel and slow discharge speed, which seriously affects the overall production efficiency of the line. In addition, in order to effectively cut the packaging bag, the blade must be kept sharp and usually installed facing upwards. This exposed sharp structure constitutes a continuous safety risk, making it very easy for workers to be cut when cleaning up the material spilled above the hopper and above the blade mounting bracket (or mounting plate). Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the above-mentioned technologies.

[0005] Therefore, one objective of this utility model is to propose a plastic packaging bag tearing mechanism, which can simultaneously cut multiple large-area openings at the bottom of the packaging bag through a cutting array composed of multiple sets of blades, greatly increasing the material outflow area, improving the material flow rate, and significantly improving the discharge efficiency. At the same time, the setting of the spacing adjustment mechanism can flexibly and conveniently adjust the relative spacing between multiple blades according to the specific size of different packaging bags.

[0006] To achieve the above objectives, the first aspect of this utility model provides a plastic packaging bag-tearing mechanism, comprising: a feeding hopper, a mounting frame, an adjusting mechanism, multiple blades, and a flipping mechanism, wherein the mounting frame is mounted on the upper part of the feeding hopper; the adjusting mechanism is disposed on the mounting frame, and the adjusting mechanism includes a transmission part, multiple connecting plates, and a driving component, wherein the transmission part is disposed inside the mounting frame; the multiple connecting plates are respectively connected to the transmission part, and each connecting plate has a slot at its front end; the driving component is mounted on the outer side of the mounting frame; the multiple blades are respectively disposed inside the corresponding slots; and the flipping mechanism is disposed between the mounting frame and the connecting plates and the blades.

[0007] In addition, the plastic packaging tearing mechanism proposed above according to this utility model may also have the following additional technical features: Specifically, the connecting plate is provided with a first through hole, two second through holes and a third through hole.

[0008] Specifically, the transmission unit includes a bidirectional lead screw, two guide rods, two sliding sleeves, and a scissor lift bracket. The bidirectional lead screw passes through the first through hole and is rotatably connected to the mounting bracket. The two guide rods pass through corresponding second through holes and are connected to the mounting bracket. The two sliding sleeves are respectively disposed in the two first through holes near the side wall of the mounting bracket and are threadedly connected to the bidirectional lead screw. The scissor lift bracket is rotatably connected to the upper middle part of each of the connecting plates.

[0009] Specifically, the flipping mechanism includes a rotating rod, two protruding plates, two knobs, and two positioning pins. The rotating rod passes through the third through hole and has a cross-shaped cross section. The blade has a cross groove corresponding to the rotating rod, and the rotating rod passes through the cross groove. The two protruding plates are respectively disposed at both ends of the front side of the mounting bracket. The two knobs are rotatably connected to the protruding plates and connected to the corresponding ends of the rotating rod. Each of the two knobs has a positioning hole. The two positioning pins pass through the protruding plates and are inserted into the corresponding positioning holes.

[0010] Specifically, the output end of the drive unit is connected to one end of the bidirectional lead screw.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The plastic packaging tearing mechanism of the present invention can simultaneously cut multiple large-area openings at the bottom of the packaging bag through a cutting array composed of multiple sets of blades, which greatly increases the material outflow area, improves the material flow rate, and significantly improves the discharge efficiency. At the same time, the adjustable spacing mechanism can flexibly and conveniently adjust the relative spacing between multiple blades according to the specific size of different packaging bags. In addition, the flipping mechanism allows the operator to control the blade set to flip downwards when not in operation, so that the blades are stored under the mounting frame, thus preventing the operator from being scratched when cleaning up materials spilled above the mounting frame, thereby improving safety.

[0012] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0013] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic diagram of a plastic packaging bag tearing mechanism according to an embodiment of the present invention. Figure 1 ; Figure 2This is a schematic diagram of a plastic packaging bag tearing mechanism according to an embodiment of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the adjustable distance mechanism of a plastic packaging bag tearing mechanism according to an embodiment of the present invention; Figure 4 This is a schematic diagram of a connecting plate structure for a plastic packaging bag-tearing mechanism according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the flipping mechanism of a plastic packaging bag tearing mechanism according to an embodiment of the present invention.

[0014] Reference numerals: 1. Hopper; 2. Mounting bracket; 3. Adjustment mechanism; 301. Transmission unit; 3011. Two-way lead screw; 3012. Guide rod; 3013. Sliding sleeve; 3014. Scissor lifter; 302. Connecting plate; 3021. Slot; 303. Drive component; 4. Blade; 5. Tilting mechanism; 501. Rotating rod; 502. Protruding plate; 503. Knob; 504. Positioning pin. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0016] A plastic packaging bag tearing mechanism according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0017] like Figures 1-5 As shown, a plastic packaging bag tearing mechanism according to an embodiment of the present invention may include: a feeding hopper 1, a mounting frame 2, an adjusting mechanism 3, multiple blades 4, and a flipping mechanism 5.

[0018] The mounting frame 2 is installed on the upper part of the feeding hopper 1.

[0019] It should be noted that the feeding hopper 1 is placed vertically to the ground by means of support legs. The feeding hopper 1 is arranged in a cone shape. A collection bucket or conveying device can be placed below the feeding hopper 1 to collect the unpacked material.

[0020] Mounting bracket 2 is installed on the upper part of the feeding hopper 1.

[0021] It should be noted that the mounting bracket 2 is fixedly connected to the upper rear end of the hopper 1 by bolts.

[0022] The adjusting mechanism 3 is mounted on the mounting frame 2. The adjusting mechanism 3 includes a transmission part 301, multiple connecting plates 302 and a driving component 303.

[0023] The transmission part 301 is located inside the mounting frame 2, and multiple connecting plates 302 are connected to the transmission part 301 respectively. Each connecting plate 302 has a slot 3021 at its front end, and the driving component 303 is installed on the outside side of the mounting frame 2.

[0024] It should be noted that the connecting plate 302 extends to the front side of the mounting bracket 2, so that the slot 3021 is not obstructed by the mounting bracket 2.

[0025] It is understandable that the spacing between two adjacent connecting plates 302 is the same. The driving component 303 is a drive motor that can rotate in both directions. It is fixedly installed on the mounting bracket 2 by bolts, and the drive motor has a self-locking function. By controlling the operation of the transmission part 301 through the driving component 303, the variable pitch adjustment function between the connecting plates 302 can be realized, thereby adapting to different specifications of plastic packaging.

[0026] Multiple blades 4 are respectively set inside the corresponding slots 3021.

[0027] It should be noted that, in this embodiment, the blade 4 is positioned with its blade tip facing the mounting bracket 2 and is inclined, with the blade tip extending to the upper part of the mounting bracket 2, so that the blade 4 can quickly cut through the plastic packaging and reduce resistance.

[0028] In addition, it is understandable that the multiple sets of blades 4 form a cutting array. By simultaneously cutting multiple large-area openings at the bottom of the packaging bag, the outflow area and flow rate of the material are greatly increased, significantly improving the discharge efficiency. The multiple cuts are distributed at different positions at the bottom of the bag, which can ensure that the material (especially the easily residual powdery material) is completely emptied from all corners with basically no residue, reducing material loss.

[0029] The flipping mechanism 5 is located between the mounting bracket 2, the connecting plate 302, and the blade 4.

[0030] Understandably, the flipping mechanism 5 can drive the blade 4 to flip 180 degrees synchronously, so that the blade tip faces downward and is completely away from the operating area, eliminating the risk of accidental injury to personnel. When work is required, the blade 4 can be flipped back to the upward working position, which is safe and reliable.

[0031] Specifically, when producing plastics in a plastics factory, this device is used in conjunction with a robotic arm to disassemble the plastic packaging of bulk purchased granular raw materials such as polyethylene (PE), polypropylene (PP), and ABS, and to collect the materials in a unified manner.

[0032] First, a conveying device or a collection bucket is placed at the bottom of the hopper 1. The drive unit 303 is activated to work with the transmission unit 301 and the connecting plate 302 to adjust the distance between two adjacent blades 4, so that the overall length that the blade assembly can cover is slightly less than the length of the plastic package.

[0033] Next, the staff operated the flipping mechanism 5 to make the blade 4 rotate 180 degrees synchronously, so that the blade tip was facing upward.

[0034] Then, a robotic arm grabs a bag of raw materials and moves it to the upper part of the mounting frame 2, so that the bottom end of the packaging bag contacts the upper part of the mounting frame 2. After that, the robotic arm drives the packaging bag to move to the center of the lower hopper 1. During the movement, the blade 4 cuts into the packaging bag from one end and gradually cuts open the bottom of the bag along a straight line, forming multiple large openings. The granular raw materials flow into the lower hopper 1 from each opening and fall into the collection bucket or conveyor device for the next process.

[0035] Repeating this operation allows for the rapid dismantling of plastic packaging for batches of granular raw materials, greatly improving work efficiency.

[0036] After all the raw materials have been unpacked, the staff manually operate the flipping mechanism 5 again to flip the blade 4 and store it in the lower part of the mounting frame 2, so as to avoid accidental cuts to the staff when they are debugging, maintaining or cleaning the equipment.

[0037] In one embodiment of this utility model, such as Figure 4 As shown, the connecting plate 302 has a first through hole, two second through holes and a third through hole.

[0038] It should be noted that, in this embodiment, the first through hole is located in the middle of the connecting plate 302, the two second through holes are located on the front and rear sides of the first through hole, and the third through hole penetrates the slot 3021.

[0039] In one embodiment of this utility model, such as Figure 3 and Figure 4 As shown, the transmission unit 301 includes a two-way lead screw 3011, two guide rods 3012, two sliding sleeves 3013, and a scissor lift 3014.

[0040] The bidirectional lead screw 3011 passes through the first through hole and is rotatably connected to the mounting bracket 2. The two guide rods 3012 pass through the corresponding second through holes and are connected to the mounting bracket 2. The two sliding sleeves 3013 are respectively set in the two first through holes near the side wall of the mounting bracket 2 and are threadedly connected to the bidirectional lead screw 3011. The scissor lift 3014 is rotatably connected to the upper middle part of each connecting plate 302.

[0041] The output end of the drive unit 303 is connected to one end of the bidirectional lead screw 3011.

[0042] It should be noted that the diameter of the first through hole described in this embodiment is larger than the diameter of the bidirectional lead screw 3011, so that the bidirectional lead screw 3011 will not contact the connecting plate 302 when rotating, and the multiple intermediate hinge points of the scissor lift 3014 are rotatably connected to each of the connecting plates 302 respectively.

[0043] Specifically, when adjusting the spacing between adjacent blades 4, the bidirectional lead screw 3011 is rotated by the drive component 303. In conjunction with the sliding sleeve 3013, the two connecting plates 302 on the outermost sides can move synchronously, moving closer or further apart from each other. At the same time, the scissor lift 3014 is adjusted accordingly, and the scissor lift 3014 will drive the other connecting plates 302 to move synchronously, thereby precisely controlling the spacing between the two adjacent blades 4.

[0044] In one embodiment of this utility model, such as Figure 3 As shown, the flipping mechanism 5 includes a rotating rod 501, two protruding plates 502, two knobs 503, and two positioning pins 504.

[0045] The rotating rod 501 passes through the third through hole. The cross section of the rotating rod 501 is cross-shaped. The blade 4 has a cross groove corresponding to the rotating rod 501. The rotating rod 501 passes through the cross groove. Two protruding plates 502 are respectively set at the two ends of the front side of the mounting bracket 2. Two knobs 503 are rotatably connected to the protruding plates 502 and connected to the corresponding end of the rotating rod 501. Both knobs 503 have positioning holes. Two positioning pins 504 pass through the protruding plates 502 and are inserted into the corresponding positioning holes.

[0046] It should be noted that the third through hole and the cross groove described in this example are positioned to correspond to each other, so that when adjusting the blade distance, the connecting plate 302 and the blade 4 can slide laterally along the rotating rod 501 through the third through hole and the cross groove respectively. The cross-shaped cross section of the rotating rod 501, combined with the cross groove, can keep the blade 4 stable and prevent the blade 4 from rotating during cutting.

[0047] Additionally, it should be noted that the knob 503 and the rotating rod 501 are connected by a detachable key connection, which facilitates the replacement of the blade 4. The upper end of the positioning pin 504 is provided with a limit block, which allows the positioning pin 504 to be locked in the upper end of the protrusion 502, and also makes it easy to pull out the positioning pin 504. The positioning pin 504 is inserted into the positioning hole and cooperates with the protrusion 502 to keep the knob 503 and the rotating rod 501 stable.

[0048] Specifically, after unpacking the plastic packaging, the staff can manually pull out the positioning pin 504 to release the positioning of the knob 503 and the rotating rod 501, then rotate the knob 503 180 degrees until the tip of the blade 4 is vertically downward, and then insert the positioning pin 504 back into the positioning hole to complete the storage of the blade 4.

[0049] In summary, this utility model's plastic packaging tearing mechanism, through a cutting array composed of multiple sets of blades, can simultaneously create multiple large-area openings at the bottom of the packaging bag, greatly increasing the material outflow area, improving material flow rate, and significantly enhancing discharge efficiency. Simultaneously, the adjustable spacing mechanism allows for flexible and convenient adjustment of the relative spacing between the multiple blades according to the specific dimensions of different packaging bags. Furthermore, the flipping mechanism allows workers to control the blade assembly to flip downwards when not in operation, retracting the blades below the mounting frame. This prevents workers from being scratched when cleaning up spilled materials above the mounting frame, improving safety.

[0050] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A plastic packaging bag tearing mechanism, characterized in that, include: The components include a hopper, mounting frame, spacing adjustment mechanism, multiple blades, and a tilting mechanism. The mounting bracket is installed on the upper part of the hopper; The adjusting mechanism is mounted on the mounting frame, and includes a transmission part, multiple connecting plates, and a driving component. The transmission unit is disposed inside the mounting frame; The multiple connecting plates are respectively connected to the transmission part, and each connecting plate has a slot at its front end; The drive component is mounted on the outer side of the mounting bracket; Multiple blades are respectively disposed inside the corresponding slots; The flipping mechanism is disposed between the mounting bracket, the connecting plate, and the blade.

2. The plastic packaging bag tearing mechanism according to claim 1, characterized in that, The connecting plate is provided with a first through hole, two second through holes and a third through hole.

3. A plastic packaging bag tearing mechanism according to claim 2, characterized in that, The transmission unit includes a two-way lead screw, two guide rods, two sliding sleeves, and a scissor lift, wherein... The bidirectional lead screw passes through the first through hole and is rotatably connected to the mounting bracket. The two guide rods respectively pass through the corresponding second through holes and are connected to the mounting bracket; The two sliding sleeves are respectively disposed in the two first through holes near the side wall of the mounting bracket and are threadedly connected to the bidirectional lead screw. The scissor lift is rotatably connected to the upper middle part of each of the connecting plates.

4. A plastic packaging bag tearing mechanism according to claim 2, characterized in that, The flipping mechanism includes a rotating rod, two protruding plates, two knobs, and two positioning pins, wherein... The rotating rod passes through the third through hole, the rotating rod has a cross-shaped cross section, and the blade has a cross groove corresponding to the rotating rod, through which the rotating rod passes. The two protruding plates are respectively disposed at both ends of the front side of the mounting bracket; The two knobs are respectively rotatably connected to the convex plate and connected to the corresponding end of the rotating rod; Both knobs are provided with positioning holes; The two positioning pins pass through the protruding plate and are inserted into the corresponding positioning holes.

5. A plastic packaging bag tearing mechanism according to claim 3, characterized in that, The output end of the drive component is connected to one end of the bidirectional lead screw.

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