A double-sided cutting device for packaging bags

Abstract

The present invention discloses a double-sided cutting device for packaging bags, comprising a frame and a conveyor belt, the punching mechanism comprising a punching cylinder, a connecting plate and a punching head, the bottom of the punching head being formed with two punching pins; the slitting mechanism comprising two connecting blocks arranged in a herringbone shape and mounted on a support rod, with slitting blades symmetrically mounted on opposite sides of the two connecting blocks; the cutting mechanism comprising a cutting feed press and a cutting cylinder mounted on the cutting feed press, the pneumatic end of the cutting cylinder being fixedly connected to a knife holder, the bottom of the knife holder being fixedly connected to a cutting blade. The present invention ensures the stability of the packaging bag slitting and the consistency of the width of the packaging bag after slitting by using two slitting blades, and at the same time ensures the consistency of the length of the packaging bag by using a double cutting method, thereby ensuring the size consistency of the packaging bag after slitting and cutting, and avoiding the low yield rate caused by the traditional single slitting and single cutting.

Description

Technical Field

[0001] The invention belongs to the technical field of packaging bag printing equipment, and particularly relates to a double-sided cutting device for packaging bags. Background Art

[0002] At present, when slitting printed packaging bags, most of them use a single cutter to first cut the packaging bag longitudinally from the middle, and then use the cutting mechanism of the single cutter to cut it into individual packaging bags. Since the blade used for longitudinal cutting is relatively thin, it is easy to deviate during use, resulting in uneven cutting edges of the cut packaging bags, which eventually leads to scrapping. At the same time, it is not easy for a single cutter to cut off the easy-tear edges of both packaging bags during cutting, so the uncut easy-tear edges need to be handled by workers later, which is very troublesome. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art and provide a double-sided cutting device for packaging bags. It adopts double trimming and double cutting methods, which can effectively improve the stability of cutting and at the same time improve the consistency and integrity of each packaging bag after cutting.

[0004] The technical solution adopted by the present invention is: a double-sided cutting device for packaging bags, comprising a frame, a top of the frame having conveyor rollers evenly installed along the length direction thereof, a plurality of conveyor belts evenly arranged on the conveyor rollers along the length direction thereof, and a punching mechanism, a slitting mechanism, and a cutting mechanism sequentially distributed above the conveyor belts along the conveying direction;

[0005] The punching mechanism includes a punching cylinder, a connecting plate and a punching head. The punching cylinder is fixed above the conveyor belt through a fixed mounting plate. The pneumatic end of the punching cylinder passes through the fixed mounting plate and is connected to the center of the top surface of the connecting plate. The punching head is fixed to the center of the bottom surface of the connecting plate. Two punching pins are formed on the bottom of the punching head.

[0006] The slitting mechanism includes a support rod connected and fixed to the frame, and two connecting blocks arranged in a herringbone shape are mounted on the support rod, and slitting blades are symmetrically mounted on opposite sides of the two connecting blocks;

[0007] The cutting mechanism includes a cutting feed table, a support frame is installed on the top of the cutting feed table away from the slitting mechanism, a cutting cylinder is fixedly installed at the top center of the support frame, the pneumatic end of the cutting cylinder is fixedly connected to the knife holder, and the bottom of the knife holder is fixedly connected to the cutting knife.

[0008] Preferably, two punching mechanisms are provided, which are staggeredly installed on both sides of the conveyor belt, and the distance between the two punching mechanisms is the width of a packaging bag.

[0009] Preferably, the support rod is cylindrical, the connecting block is mounted on the support rod and can rotate around the support rod, and a threaded hole communicating with the support rod is provided on the side of the connecting block close to the support rod, and a locking bolt that cooperates with the thread is provided in the threaded hole.

[0010] Preferably, a horizontally arranged pressure gasket is formed at the bottom of the connecting block, and an avoidance groove is opened on the pressure gasket at a position corresponding to the slitting blade. After the slitting blade is fixed to the connecting block, the cutting edge of the slitting blade passes through the avoidance groove and extends out of the pressure gasket.

[0011] Preferably, the cutting mechanism also includes an adjusting groove, the top of the adjusting groove is connected to the pneumatic end of the cutting cylinder, an adjusting cylinder is fixedly installed on one side of the adjusting groove, the pneumatic end of the adjusting cylinder extends into the adjusting groove and is connected to an adjusting block, and the bottom of the adjusting block is fixedly connected to the top of the tool holder.

[0012] Preferably, a plurality of evenly distributed guide rods are installed in the adjustment groove along its length direction, and the adjustment block is sleeved on the guide rods.

[0013] Preferably, the cutting and feeding table includes a supporting platform and a pressing platform respectively connected to the frame, a gap is left between the supporting platform and the pressing platform, and the top surface of the supporting platform is flush with the surface of the conveyor belt, and a pressing cylinder is installed on the top of the pressing platform, and the pneumatic end of the pressing cylinder passes through the pressing platform and is connected to the pressing seat.

[0014] Preferably, a material receiving trough is provided on the side of the support away from the conveyor belt, a suction hopper is installed between the material receiving trough and the support, and a suction fan is connected to the bottom of the suction hopper through a material pipe.

[0015] Preferably, pressure rollers are respectively installed between the punching mechanism, the slitting mechanism and the cutting mechanism on the conveyor belt.

[0016] The beneficial effects of the present invention are:

[0017] (1) Two punching pins are formed on the punching head. When punching the easy-tear openings of two adjacent packaging bags, the easy-tear openings of the two packaging bags are separated from each other, which facilitates subsequent uniform cutting and ensures the effectiveness of the easy-tear openings after cutting;

[0018] (2) Punching mechanisms are staggered on both sides of the conveyor belt, which reduces the width of the conveyor belt while ensuring that two rows of packaging bags are punched;

[0019] (3) The slitting mechanism uses two herringbone-shaped slitting blades, which can effectively ensure that the two rows of packaging bags are cut apart and the consistency of the two rows of packaging bags is guaranteed after cutting;

[0020] (4) A pressure pad is provided at the slitting blade, which is beneficial to maintaining the flatness of the packaging bag during slitting. It can also limit the slitting blade to prevent the slitting blade from swinging;

[0021] (5) A cutting feed table is provided to press the two rows of packaging bags delivered by the conveyor belt after slitting, making it easier for the cutting knife to cut;

[0022] (6) An adjustment slot is provided, and a double cutting action can be achieved by adjusting the cylinder, that is, the first cutting is performed along the easy-tear edge of the packaging bag extending out of the cutting feed table. After the cylinder adjusts the position of the cutting knife, the cutting knife cuts along the easy-tear edge of the packaging bag pressed against the cutting feed table for the second time, completing the double cutting;

[0023] (7) The waste strips produced by double cutting fall between the receiving trough and the supporting platform, and the waste strips are sucked away by setting a suction hopper for centralized processing.

[0024] The present invention ensures the stability of packaging bag slitting and the consistency of packaging bag width after slitting by two slitting blades. At the same time, the double cutting method ensures the consistency of packaging bag length, thereby making the size of packaging bags consistent after slitting and cutting, avoiding the low yield rate caused by traditional single slitting and single cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 It is a partial schematic diagram of the cutting mechanism of the present invention.

[0027] In the figure: 1. Frame; 2. Conveyor roller; 3. Conveyor belt; 4. Punching mechanism; 5. Slitting mechanism; 6. Cutting mechanism; 7. Receiving trough; 8. Suction hopper; 9. Pressing roller; 41. Punching cylinder; 42. Connecting plate; 43. Punching head; 44. Punching nail; 51. Support rod; 52. Connecting block; 53. Slitting blade; 54. Locking bolt; 55. Pressing gasket; 61. Cutting feed table; 62. Cutting cylinder; 63. Knife holder; 64. Cutting knife; 65. Adjusting slot; 66. Adjusting cylinder; 67. Adjusting block; 68. Guide rod; 611. Support platform; 612. Pressing platform; 613. Pressing cylinder; 614. Pressing seat. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Example

[0030] like Figure 1 and Figure 2As shown, the double-sided cutting device for packaging bags provided in this embodiment includes a frame 1, on the top of the frame 1, there are evenly installed conveyor rollers 2 along the length direction of the frame 1, and a plurality of conveyor belts 3 are evenly arranged along the length direction of the conveyor rollers 2. A pressing roller 9 is installed above the head end of the conveyor belt 3 to ensure that the incoming packaging bags are flat; above the conveyor belt 3, there are sequentially distributed a punching mechanism 4, a slitting mechanism 5, and a cutting mechanism 6 along the conveying direction;

[0031] The punching mechanism 4 is provided with two along the conveyor belt 3. The two punching mechanisms 4 are provided on both sides of the conveyor belt 3, and the interval between the two punching mechanisms 4 on the conveyor belt 3 is the width of a packaging bag, that is, when the packaging bag stops, the front punching mechanism 4 punches holes on one side of the side-by-side packaging bags, and the rear punching mechanism 4 punches holes on the other side of the side-by-side packaging bags. The two punching mechanisms 4 arranged in an interlaced manner effectively reduce the width of the conveying production line compared to the two punching mechanisms 4 arranged side by side. The punching mechanism 4 includes a punching cylinder 41, a connecting plate 42 and a punching head 43; A fixed mounting plate is fixedly connected to the frame 1 so that the fixed mounting plate is placed above one side of the conveyor belt 3. A punching cylinder 41 is fixedly connected to the fixed mounting plate. The pneumatic end of the punching cylinder 41 passes downward through the fixed mounting plate and is connected to the top center of the connecting plate 42. A punching head 43 is connected to the bottom center of the connecting plate 42. Two punching nails 44 are formed on the bottom of the punching head 43. A gap is left between the two punching nails 44 to ensure that after the easy-tear openings of two adjacent packaging bags are punched, the two easy-tear openings are separated, so as to facilitate the subsequent double-cutting operation.

[0032] A pressing roller 9 is also installed between the punching mechanism 4 and the slitting mechanism 5 to ensure that the entire packaging bag is flat during the conveying process;

[0033] The slitting mechanism 5 includes a support rod 51 connected and fixed to the frame 1. The support rod 51 is a cylindrical rod. Two connecting blocks 52 are set in the middle of the support rod 51. The two connecting blocks 52 are rectangular blocks. A connecting hole is opened at one corner to connect to the support rod 51. The two connecting blocks 52 are set in a herringbone shape. A threaded hole is also opened on the side of the connecting block 52 close to the support rod 51. The threaded hole is connected to the connecting hole connecting the support rod 51. The threaded hole is provided with a locking bolt 54 that matches its thread. The bottom end of the locking bolt 54 is covered with a rubber sleeve so that after the locking bolt 54 is tightened, its bottom abuts against the surface of the support rod 51, thereby preventing the connecting block 52 from rotating; slitting blades 53 are symmetrically installed on the opposite sides of the two connecting blocks 52, and a horizontal pressure gasket 55 is connected to the bottom of each connecting block 52. The slitting blade 53 is provided with an avoidance groove at the corresponding position of the pressure pad 55 and the slitting blade 53. The slitting blade 53 is located in the avoidance groove, and its top is fixedly connected to the side wall of the connecting block 52, and its bottom cutting edge extends out of the bottom of the pressure pad 55. The packaging bags on the conveyor belt 3 are kept flat during slitting by the pressure pad 55, thereby improving the slitting effect. At the same time, the avoidance groove of the pressure pad 55 limits the slitting blade 53, avoiding the thinner slitting blade 53 from shaking under force during slitting. The extended slitting blade 53 contacts the packaging bags on the conveyor belt 3, so that the slitting blade 53 cuts the packaging bags when the conveyor belt 3 is transported. The two connecting blocks 52 are both located in the middle of the conveyor belt 3. After adjusting the angle of the connecting block 52 by the locking bolt 54, the two slitting blades 53 cut the middle of the side-by-side packaging bags respectively, so that the width of each row of packaging bags is consistent after slitting.

[0034] The cutting mechanism 6 includes a cutting feed platform 61 located at the end of the conveyor belt 3, and the cutting feed platform 61 includes a support platform 611 and a pressing platform 612 respectively connected to the frame 1. The surface of the support platform 611 is flush with the surface of the conveyor belt 3. The pressing platform 612 is located above the support platform 611. A pressing cylinder 613 is installed on the top of the pressing platform 612. The pneumatic end of the pressing cylinder 613 passes through the pressing platform 612 and is connected to a pressing seat 614. The packaging bags transported and cut by the conveyor belt 3 pass through the support platform 611. Before cutting, the packaging bags on the support platform 611 are pressed tightly by the pressing seat 614, and then the cutting work is performed;

[0035] A support frame is installed on the top of the pressing platform 612 away from the slitting mechanism 5, and a cutting cylinder 62 is fixedly installed at the center of the top of the support frame. The pneumatic end of the cutting cylinder 62 is fixedly connected to an adjusting slot 65, and several evenly distributed guide rods 68 are installed on the adjusting slot 65. An adjusting block 67 that slides with the guide rod 68 is connected to the guide rod 68. An adjusting cylinder 66 is fixedly installed on one side of the adjusting slot 65, and the pneumatic end of the adjusting cylinder 66 extends into the adjusting slot 65 and is connected to the adjusting block 67; by providing the guide rod 68 to support the adjusting block 67, it is easier for the adjusting cylinder 66 to drive the adjusting block 67 to move, thereby improving the stability of the equipment operation. The bottom of the adjusting block 67 is fixedly connected to the top of the knife holder 63, and the bottom of the knife holder 63 is fixedly connected to the cutting knife 64;

[0036] A material receiving trough 7 is provided on the side of the support platform 611 away from the conveyor belt 3 , and a suction hopper 8 is installed between the material receiving trough 7 and the support platform 611 , and a suction fan is connected to the bottom of the suction hopper 8 through a material pipe.

[0037] During use, the printed packaging bags are fed onto the conveyor belt 3, which is controlled by a stepper motor. When the conveyor belt 3 stops, the packaging bags are respectively positioned below the two punching devices, and the pressing seat 614 of the cutting mechanism 6 presses the packaging bags below. The extended packaging bags are complete packaging bags. The cutting knife 64 is now located on the side of the adjusting slot 65 away from the slitting mechanism 5, that is, above the side of the extended packaging bag that needs to be cut, and just above the edge of the processed easy-tear opening. The cutting knife 64 cuts, and the packaging bag falls down after being cut and is discharged from the receiving slot 7. At this time, the cutting knife 64 is controlled by the adjusting cylinder 66 to control the displacement, and the adjusting block 67 moves to the side of the adjusting slot 65 close to the slitting mechanism 5. At this time, the cutting knife 64 is located above the outer side of the packaging bag pressed by the pressing seat 614, and is aligned with the edge of the easy-to-tear edge on the outer side of the pressed packaging bag. The cutting knife 64 cuts again to complete the double cutting action, and the cut packaging bag waste falls from the gap between the receiving trough 7 and the supporting platform 611, and is sucked away by the suction force generated by the suction hopper 8 below to the waste box for centralized processing; after completing a double cut, the conveyor belt 3 is displaced again by the distance of a packaging bag, and the above-mentioned punching device punching and cutting mechanism 6 double cutting actions are repeated; during the operation of the conveyor belt 3, the middle part of the displaced packaging bag is cut by the fixed slitting blade 53 to complete the cutting work, and the cut packaging bag enters the cutting feed table 61 of the cutting mechanism 6 when the conveyor belt 3 is displaced again.

[0038] The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any modification and replacement based on the technical solution and inventive concept provided by the present invention should be covered by the protection scope of the present invention.

Claims

1. A double-sided cutting device for packaging bags, comprising a frame (1), a top of the frame (1) being uniformly provided with conveying rollers (2) along its length, and a plurality of conveying belts (3) being uniformly provided on the conveying rollers (2) along the length of the conveying rollers (2), characterized in that: A punching mechanism (4), a slitting mechanism (5) and a cutting mechanism (6) are sequentially distributed above the conveyor belt (3) along the conveying direction; The punching mechanism (4) includes a punching cylinder (41), a connecting plate (42) and a punching head (43). The punching cylinder (41) is fixed above the conveyor belt (3) through a fixed mounting plate. The pneumatic end of the punching cylinder (41) passes through the fixed mounting plate and is connected to the center of the top surface of the connecting plate (42). The punching head (43) is fixed to the center of the bottom surface of the connecting plate (42). Two punching pins (44) are formed on the bottom of the punching head (43). The slitting mechanism (5) comprises a support rod (51) connected and fixed to the frame (1); two connecting blocks (52) arranged in a herringbone shape are mounted on the support rod (51); and slitting blades (53) are symmetrically mounted on opposite sides of the two connecting blocks (52); The cutting mechanism (6) comprises a cutting feed table (61), a support frame is installed on the top of the cutting feed table (61) away from the slitting mechanism (5), a cutting cylinder (62) is fixedly installed at the center of the top of the support frame, the pneumatic end of the cutting cylinder (62) is fixedly connected to the knife holder (63), and the bottom of the knife holder (63) is fixedly connected to the cutting knife (64); the cutting mechanism (6) also comprises an adjusting groove (65), the top of the adjusting groove (65) is connected to the pneumatic end of the cutting cylinder (62), an adjusting cylinder (66) is fixedly installed on one side of the adjusting groove (65), the pneumatic end of the adjusting cylinder (66) extends into the adjusting groove (65) and is connected to an adjusting block (67), and the bottom of the adjusting block (67) is fixedly connected to the top of the knife holder (63).

2. The double-sided cutting device for packaging bags according to claim 1, characterized in that: There are two punching mechanisms (4) which are staggeredly installed on both sides of the conveyor belt (3), and the distance between the two punching mechanisms (4) is the width of a packaging bag.

3. The double-sided cutting device for packaging bags according to claim 1, characterized in that: The support rod (51) is cylindrical, and the connecting block (52) is mounted on the support rod (51) and can rotate around the support rod (51). A threaded hole communicating with the support rod (51) is formed on the side of the connecting block (52) mounted on the support rod (51) close to the support rod (51), and a locking bolt (54) is provided in the threaded hole and matched with the thread.

4. A double-sided cutting device for packaging bags according to claim 1 or 3, characterized in that: A horizontally arranged pressure pad (55) is formed at the bottom of the connecting block (52), and an avoidance groove is provided on the pressure pad (55) at a position corresponding to the slitting blade (53). After the slitting blade (53) is fixed to the connecting block (52), the cutting edge of the slitting blade (53) passes through the avoidance groove and extends out of the pressure pad (55).

5. The double-sided cutting device for packaging bags according to claim 1, characterized in that: Several evenly distributed guide rods (68) are installed in the adjusting groove (65) along its length direction, and the adjusting block (67) is sleeved on the guide rods (68).

6. A double-sided cutting device for packaging bags according to claim 1 or 5, characterized in that: The cutting feed platform (61) comprises a support platform (611) and a pressing platform (612) respectively connected to the frame (1), a gap is left between the support platform (611) and the pressing platform (612), and the top surface of the support platform (611) is flush with the surface of the conveyor belt (3), and a pressing cylinder (613) is installed on the top of the pressing platform (612), and the pneumatic end of the pressing cylinder (613) passes through the pressing platform (612) and is connected to a pressing seat (614).

7. The double-sided cutting device for packaging bags according to claim 6, characterized in that: A material receiving trough (7) is further provided on the side of the support platform (611) away from the conveyor belt (3), and a material suction hopper (8) is installed between the material receiving trough (7) and the support platform (611), and a suction fan is connected to the bottom of the material suction hopper (8) through a material pipe.

8. The double-sided cutting device for packaging bags according to claim 1, characterized in that: Pressing rollers (9) are respectively installed between the punching mechanism (4), the slitting mechanism (5) and the cutting mechanism (6) on the conveyor belt (3).

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