Bag opening tool and bag opening device

Abstract

The application discloses a bag breaking cutter and a bag breaking device. The bag breaking cutter comprises a cutter seat and a cutter body. The cutter body is connected with the cutter seat. One side of the cutter body is provided with a notch. The cutter body is provided with at least three blade top portions protruding in a direction away from the cutter seat. The two ends of the cutter and the space between any two blade top portions are provided with blade bottom portions concave in a direction close to the cutter seat. The blade bottom portions and the adjacent blade top portions are provided with continuous blades. In the application, the bag breaking cutter has a part without blades. The opening of the bag after being poked has a part still connected with the bag, which will not fall into the material. The blade top portions of the bag breaking cutter are not less than three, which can be inserted into the bag and support the bag, so that the bag is not easy to deflect, the accumulation of materials caused by the deflection of the bag is prevented, the bag breaking and the material falling are facilitated, the wave arc line type blades are formed by the blade top portion structure and the blade bottom portion structure in turn, the continuous and gapless sawteeth are formed, and the bottom of the bag is not easy to be rough and generate foreign matters during the bag breaking.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automation equipment, in particular to a bag breaking cutter and a bag breaking device. BACKGROUND

[0002] Ton bag is a kind of flexible transport packaging container, which is generally made of polyester fibers such as polypropylene and polyethylene, and has the characteristics of simple structure, light weight, foldability, small space occupation after recycling, low price and the like. Ton bag has been widely used in the packaging and transportation of various powdery, granular and blocky materials such as chemical industry, building materials and plastic mineral products. With the crane or forklift, the unitized transportation can be realized.

[0003] At present, ton bag material is basically unloaded by mechanical bag breaking method, but most of the bag breaking mechanisms are complex, and the bag breaking device is easy to mix burrs or debris into the material during bag breaking, causing pollution and even waste of the material. SUMMARY

[0004] The main purpose of the present application is to provide a bag breaking cutter and a bag breaking device, which aims to solve the problem that the traditional bag breaking method is easy to mix burrs or debris into the material, causing pollution and even waste of the material.

[0005] To achieve the above purpose, the present application provides a bag breaking cutter assembly, which comprises a cutter seat and a cutter body; the cutter body is connected with the cutter seat, one side of the cutter body has a notch; the cutter body has at least three blade top parts protruding in the direction away from the cutter seat, the two ends of the cutter and the blade top parts have blade bottom parts recessed in the direction close to the cutter seat, and the blade bottom parts and the adjacent blade top parts have continuous cutting edges.

[0006] Optionally, the cutter body comprises a plurality of sequentially connected blade groups, each blade group comprises symmetrically arranged left and right blades, and the connection between the left and right blades in a blade group forms the blade top part; the connection between the left blade of a blade group and the right blade of an adjacent blade group forms the blade bottom part.

[0007] Optionally, air flow holes are formed in the cutter body.

[0008] Optionally, the cutter seat comprises a seat body and a support, the cutter body is connected with the seat body through the support at the positions corresponding to the blade bottom parts, and at least one of the positions of the cutter body corresponding to the blade top parts is connected with the seat body through the support.

[0009] Optionally, a through hole is formed on the seat body for communicating with an external air source; a channel is formed in the support member, and an air inlet and an air outlet are formed on the support member and communicate with the channel, the air inlet is connected with the through hole, and the air outlet is connected with the airflow hole.

[0010] Optionally, a limiting gap is formed on the top of the support member, the air outlet is formed on the side wall of the limiting gap, and the bottom wall of the limiting gap supports the cutter body.

[0011] Optionally, the top of the support member has two transition surfaces connected with each other, the two transition surfaces are arranged downwardly in a direction away from the limiting gap, and the connection position of the two transition surfaces is coplanar with the top of the blade or the bottom of the blade.

[0012] Optionally, the cutter body is projected on the cutter seat as an arc structure, and the central angle of the arc structure is 270° to 350°.

[0013] Optionally, a plurality of material falling gaps are formed between the cutter body and the cutter seat.

[0014] In addition, the application also provides a bag breaking device, which comprises the bag breaking cutter.

[0015] In the technical scheme, the bag breaking cutter is applied to the bag breaking device. In actual application, the bag breaking cutter is moved by a mechanical structure or is carried by a mechanical structure to above the ton bag and falls to the bag breaking cutter under the gravity of the ton bag. The bag breaking cutter is inserted into the ton bag from the bottom of the ton bag. Since one side of the cutter body has a gap, that is, the cutter has a part without a blade, a C-shaped mechanism is formed. The punched hole of the ton bag is still connected with the ton bag in part and will not fall into the material mixture. In addition, the top of the blade of the bag breaking cutter is not less than 3 points, 3 points support a plane, the top of the blade is inserted into the ton bag and supports the ton bag, so that the ton bag is not easy to deflect, the ton bag is prevented from deflecting to form a material accumulation dead zone, and the bag breaking and material falling are facilitated. The wave arc line type blade is formed by the top of the blade structure and the bottom of the blade structure in sequence, and the continuous non-gap serration is formed. The bottom of the ton bag is not easy to be roughened and generate foreign matters during bag breaking. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of the drawings shown.

[0017] Figure 1A structure schematic view of the bag breaking cutter from one perspective in an embodiment of the present application;

[0018] Figure 2 A structure schematic view of the bag breaking cutter from another perspective in an embodiment of the present application;

[0019] Figure 3 A sectional view of the bag breaking cutter in an embodiment of the present application;

[0020] Figure 4 A structure schematic view of the supporting member in an embodiment of the present application;

[0021] Figure 5 A sectional view of the supporting member in an embodiment of the present application;

[0022] Figure 6 A structure schematic view of the bag breaking device in an embodiment of the present application;

[0023] Figure 7 A sectional view of the bag breaking device in an embodiment of the present application;

[0024] Figure 8 A sectional view of the bag breaking cutter in another embodiment of the present application.

[0025] BRIEF DESCRIPTION OF THE DRAWINGS

[0026]

[0027]

[0028] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work under the premise of the present application are within the protection scope of the present application.

[0030] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directionality indications also change accordingly.

[0031] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description and cannot be understood as indicating or implying the relative importance of the technical features indicated or implying the number of technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0032] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood broadly, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0034] Ton bag is a kind of flexible transport packaging container, which is generally made of polyester fiber such as polypropylene and polyethylene, and has the characteristics of simple structure, light weight, foldability, small space occupation after recycling, low price and the like. Ton bag has been widely used in the packaging and transportation of various powdery, granular and blocky materials such as chemical industry, building materials and plastic mineral products. With the crane or forklift, the unitized transportation can be realized.

[0035] At present, ton bag material is basically unloaded by mechanical bag breaking method, but most of the bag breaking mechanisms are complex, and the bag breaking device is easy to produce burrs or debris mixed into the material during bag breaking, causing pollution and even waste of the material.

[0036] The present application provides a bag breaking cutter and a bag breaking device, which aims to solve the problem that the traditional bag breaking method is easy to produce burrs or debris mixed into the material, causing pollution and even waste of the material.

[0037] In an embodiment of the present application, as Figures 1 to 3As shown, the bag-breaking knife 2 includes a knife holder 21 and a knife body 22; the knife body 22 is connected to the knife holder 21, and one side of the knife body 22 has a notch 221. The knife body 22 has at least three protruding blade tops 222 in a direction away from the knife holder 21. Both ends of the knife and between any two blade tops 222 have inwardly concave blade bottoms 223 in a direction close to the knife holder 21. There is a continuous blade 224 between the blade bottoms 223 and the adjacent blade tops 222.

[0038] Bag-breaking knife 2 is used in applications such as Figure 6 and Figure 7 In the bag-breaking device 100 shown in this embodiment, the bag-breaking knife 2 is moved by a mechanical structure or the ton bag is transported to the bag-breaking knife 2 by a mechanical structure and falls onto the bag-breaking knife 2 under the weight of the ton bag. The bag-breaking knife 2 is inserted into the ton bag from the bottom. Since one side of the knife body 22 has a notch 221, that is, part of the knife does not have a blade 224, forming a C-shaped structure, part of the punctured ton bag opening is still connected to the ton bag and will not fall in and mix with the material. In addition, the top edge 222 of the bag-breaking knife 2 has no less than 3 points, and the 3 points support a plane. The top edge 222 is inserted into the ton bag and provides support, making it less likely for the ton bag to deflect, preventing the ton bag from deflecting and forming a dead zone for material accumulation, which facilitates bag breaking and material dropping. The wavy arc-shaped blade 224 is formed by the alternating top edge 222 structure and the bottom edge 223 structure, with continuous and uninterrupted serrations, so that the bottom of the ton bag is less likely to fray or generate foreign objects when breaking the bag.

[0039] Understandably, since the two ends of the entire blade body 22 are the blade bottoms 223, the number of blade tops 222 is N, and the number of blade bottoms 223 is N+1. In actual use, the number of blade tops 222 and blade bottoms 223 can be more, for example, 4, 5, 6, etc. When the volume of the ton bag is large, increasing the number of blade tops 222 can make it easier to break the bag and support it. This application does not limit the number of blade bottoms 223.

[0040] Specifically, the cutter body 22 comprises a plurality of sequentially connected blade groups 225, each blade group 225 comprising symmetrically arranged left and right blades 2251 and 2252, and the connection between the left and right blades 2251 and 2252 of a blade group 225 forms a blade top 222; the connection between the left blade 2251 of a blade group 225 and the right blade 2252 of an adjacent blade group 225 forms a blade bottom 223. That is, the cutter body 22 is formed by sequentially arranging a plurality of identical units (blade groups 225), and the two blades (left and right blades 2251 and 2252) of the same unit are symmetrically arranged, so that when the bag breaking cutter 2 acts on the ton bag, the stress of each blade bottom 223 tends to be consistent, further ensuring that the action of each blade on the ton bag tends to be consistent, while maintaining the cutting effect of the blade bottom 223, ensuring the success rate of bag breaking, and making the entire bag breaking process start from the blade top 222, along the blade edge 224 to the blade bottom 223 to cut the ton bag, thereby ensuring the smoothness of the entire ton bag breaking operation and the stability and consistency of the bag breaking effect.

[0041] Further, the cutter body 22 is projected on the cutter seat 21 as an arc-shaped structure, and the central angle of the arc-shaped structure is 270° to 350°. That is, the cutter body 22 is a whole C-shaped cutter, which is formed by integral rolling, forms a nearly circular opening on the ton bag, and retains a certain connecting part to avoid falling into the material. And the nearly circular opening does not have a top corner structure, avoiding the tearing of the ton bag caused by the stress at the top corner, ensuring the stability of the opening structure on the ton bag, thereby having a clear material falling position.

[0042] In other embodiments, the cutter body 22 can also be formed by splicing a plurality of single structures; or the cutter body 22 is formed by splicing a plurality of blade segments. The present application does not limit whether the cutter body 22 is a whole or spliced.

[0043] Specifically, please see Figures 3 to 5 , the cutter seat 21 comprises a seat body 211 and a support 212, and the cutter body 22 is connected to the seat body 211 through the support 212 at positions corresponding to the blade bottoms 223, and at least one of the positions corresponding to the blade tops 222 is connected to the seat body 211 through the support 212. By providing the support 212, the connection position between the cutter body 22 and the cutter seat 21 is increased, thereby increasing the connection strength. And the blade bottom 223 and the seat body 211 of the cutter seat 21 have a certain distance, so that the entire cutter body 22 can extend into the ton bag, thereby ensuring the fluidization effect of the airflow hole 226 on the material on the cutter body 22.

[0044] In an embodiment, the cutter body 22 is provided with air flow holes 226. The air flow holes 226 are in communication with an external air source. When the bag breaking cutter 2 is inserted into the ton bag, the air flow holes 226 can continuously supply air inward, so as to fluidize the material and improve the discharge efficiency.

[0045] In other embodiments, the seat body 211 can be provided with air flow holes 226, and the support 212 can also be provided with detachable air flow holes 226. In this way, the number of air flow holes 226 is increased, and the fluidization efficiency of the material in the ton bag is further improved. Through the air flow holes 226 arranged on the cutter body 22, the support 212 and the seat body 211, air is supplied into the ton bag, so that the residual material in the ton bag can all fall into the discharge hopper 1.

[0046] Further, the seat body 211 is provided with a through hole 2111 for communication with an external air source. The support 212 is formed with a channel 2121, and the support 212 is also provided with an air inlet 2122 and an air outlet 2123 in communication with the channel 2121. The air inlet is connected to the through hole 2111, and the air outlet 2123 is connected to the air flow hole 226. That is, the support 212 also functions as a communication pipeline, avoiding the need to set a complex pipeline structure inside the bag breaking device 100, and ensuring the smoothness of the material flow after the bag breaking device 100 is opened on the ton bag.

[0047] Further, the top of the support 212 is provided with a limiting notch 2124, and the air outlet 2123 is formed on the side wall of the limiting notch 2124. The bottom wall of the limiting notch 2124 of the support 212 cooperates with the support cutter body 22, and the cutter body 22 is in contact with the side wall of each limiting notch 2124. The limiting notch 2124 functions as a limiting part when the cutter body 22 is installed, and the limiting notches 2124 on the plurality of supports 212 cooperate to basically fix the installation position of the cutter body 22, so as to facilitate subsequent welding to fix the cutter body 22 on the support 212. In this way, the cutter body 22 can be positioned before welding and fixing, so as to ensure that the air outlet 2123 can be connected to the air flow hole 226 after welding. Moreover, the welding connection can ensure the sealing of the connection between the two ends of the support 212.

[0048] In an embodiment, the top of the support 212 has two transition surfaces 2125 connected to each other. The two transition surfaces 2125 are arranged downwardly inclined in a direction away from the limiting notch 2124, and the connection between the two transition surfaces 2125 is coplanar with the blade top 222 or the blade bottom 223. That is, the top of the support 212 does not have a sharp corner structure, so as to avoid damaging the ton bag. Moreover, the top surface of the support 212 is arranged inclined, so that the material can slide down along the transition surface 2125 when the material flows out, and the material will not be accumulated.

[0049] In an embodiment, a plurality of material falling gaps are formed between the cutter body 22 and the seat 21. The support 212 divides the gap between the cutter body 22 and the seat body 211 into a plurality of second material falling gaps 232, and the seat body 211 is an annular structure, and the hollow part of the seat body 211 forms a first material falling gap 231. That is, after the ton bag is opened by the bag breaking cutter 2, the material in the ton bag can directly fall from the first material falling gap 231, or can first pass through the second material falling gap 232 and then fall into the first material falling gap 231, thereby improving the material falling efficiency.

[0050] In other embodiments, as shown in Figure 8 , the seat body 211 and the cutter body 22 both have notches, that is, the seat body 211 is in a C shape. When the ton bag is opened, the material in the ton bag gradually decreases, and the seat body 211 and the material in the ton bag at the opening connection do not form a step-like shape, thereby avoiding the accumulation of material at the step. The present embodiment solves the problem of material accumulation by setting the seat body 211 to also have notches.

[0051] In addition, as shown in Figure 6 and Figure 7 , the present application also provides a bag breaking device 100, which comprises the bag breaking cutter 2 as described above. Since the bag breaking device 100 comprises the bag breaking cutter 2 as described above, the bag breaking device 100 has all the beneficial effects of the bag breaking cutter 2 described above, and will not be described again.

[0052] Specifically, the bag breaking device 100 comprises a discharge hopper 1, which has a discharge bin 11, and a material inlet 12 and a material outlet 13 which are in communication with the discharge bin 11 and are oppositely arranged. The cutter is arranged in the discharge bin 11, and the cutting edge 224 of the cutter is arranged towards the material inlet 12. The ton bag is carried to above the material inlet 12 by an external carrying mechanism, and the external carrying mechanism continues to move the ton bag downward until the ton bag is broken by the bag breaking cutter 2. The material is discharged from the material outlet 13 and subjected to subsequent processing.

[0053] The discharge bin 11 comprises a dust removal section 111 and a material falling section 112 which are arranged in sequence from the material inlet 12 to the material outlet 13, and the material falling section 112 is tapered in the direction close to the material outlet 13; the sidewall of the dust removal section 111 is provided with a dust removal port 14, and the dust removal port 14 is used to communicate with an external air source to form a negative pressure at the dust removal port 14; that is, the size of the material inlet 12 is much larger than that of the material outlet 13, and the material falling section 112 is tapered in the direction close to the material outlet 13, thereby playing a role of collecting and guiding the material, facilitating the sliding of the material box from the material outlet 13. During the discharging process, dust is easily generated, and the dust removal port 14 plays a role of dust removal, reducing the dust overflow from the material inlet 12. The dust removal port 14 can be in communication with a material recycling system to collect the dust adsorbed from the dust removal port 14 and reuse it, thereby improving the utilization rate of the material.

[0054] The above merely describes preferred embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structural changes made under the inventive concept of the present application, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present application.

Claims

1. A bag-opening knife characterized by comprising: The bag breaking cutter comprises: a cutter seat; a cutter body connected with the cutter seat, one side of the cutter body having a notch; the cutter body having at least three blade top portions protruding in a direction away from the cutter seat, both ends of the cutter body and between any two blade top portions having blade bottom portions concave in a direction close to the cutter seat, the blade bottom portions having continuous cutting edges with adjacent blade top portions; the cutter body being provided with airflow holes, the cutter seat comprising a seat body and a support, the seat body being provided with a through hole for communicating with an external air source; the support being formed with a channel, the support being further provided with an air inlet and an air outlet communicating with the channel, the air inlet being in butt joint with the through hole, and the air outlet being in butt joint with the airflow holes; the top of the support being provided with a limiting notch, the air outlet being formed in a side wall of the limiting notch, the bottom wall of the limiting notch of the support supporting the cutter body, and the cutter body being in contact with the side wall of each limiting notch.

2. The bag opener of claim 1 wherein, the cutter body comprising a plurality of sequentially connected blade groups, each blade group comprising symmetrically arranged left and right blades, the connection between the left and right blades in one blade group forming the blade top portion, and the connection between the left blade of one blade group and the right blade of an adjacent blade group forming the blade bottom portion.

3. The bag opener of claim 1 wherein, the cutter body corresponding to the positions of the blade bottom portions being connected with the seat body through the support, and at least one of the positions of the cutter body corresponding to the blade top portions being connected with the seat body through the support.

4. The bag opener of claim 1 wherein, the top of the support having two connected transition surfaces, the two transition surfaces being inclined downward in a direction away from the limiting notch, and the connection between the two transition surfaces being coplanar with the blade top portion or the blade bottom portion.

5. The bag opener of any one of claims 1 to 4, wherein, the cutter body being projected on the cutter seat as an arc-shaped structure, the arc-shaped structure having a central angle of 270° to 350°.

6. The bag opener of any one of claims 1 to 4, wherein, a plurality of material falling gaps being formed between the cutter body and the cutter seat.

7. A bag breaking device characterized by comprising: The bag breaking device comprises the bag breaking cutter according to any one of claims 1 to 6.

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