Bag cutting device of bag making machine

Abstract

The utility model discloses a bag cutting device of a bag making machine. The bag cutting device comprises a machine table top, a mounting frame, a guide rod, an upper bag pressing seat plate, a lower bag pressing seat plate, a knife rest vertical rod and a driving air cylinder. The two ends of an upper bag pressing seat plate and the two ends of a lower bag pressing seat plate are connected to the two guide rods in a sleeving mode through linear bearings respectively, and an upper bag pressing head is arranged below the upper bag pressing seat plate; a lower bag pressing head is arranged above the lower bag pressing seat plate, and the lower portion of the lower bag pressing seat plate is connected with the machine table top through a spring. The upper bag pressing head and the lower bag pressing head are slotted and are communicated to form a cutter moving space groove; the two tool rest vertical rods are connected with a bag cutting tool in the tool moving space groove. The driving air cylinder drives the upper bag pressing base plate to abut against the lower bag pressing base plate and the compression spring so that the bag cutting tool can move relative to the tool moving space groove, cutting of a packaging bag film is achieved, the packaging bag film is pressed by the upper bag pressing head and the lower bag pressing head all the time in the cutting process, deviation is effectively prevented, stable operation of the bag making machine is maintained, and the production efficiency is improved. The influence on production efficiency and finished product yield is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of bag making machines, in particular to a bag cutting device of a bag making machine. Background Art

[0002] A bag-making machine is used to produce a variety of plastic or other packaging bags. It processes bags of various sizes, thicknesses, and specifications, with plastic packaging bags being the primary product. The bag-making machine's workflow primarily involves loading the film roll, sealing its edges, cutting, unloading, and folding the film to create the packaging bag.

[0003] As a crucial piece of equipment in the plastic packaging industry, the stability of the bag-making machine directly impacts product quality and production costs. The bag-cutting device, a key component that cuts the film for the bags, is crucial for successful bag-making. If the film is unstable and deflects during the cut, the cut will shift accordingly.

[0004] Especially when producing at high speeds or processing thin bags, slight displacement of the bag film during the cutting process often leads to incomplete cutting or uneven cutting edges, affecting the yield of finished products and reducing production efficiency. Therefore, it is necessary to effectively tighten the bag film to maintain its stability during the cutting process, and the bag cutting device of current bag making machines should be improved accordingly. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a bag cutting device for a bag making machine to solve the above problems.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0007] The utility model provides a bag cutting device for a bag making machine, which comprises a machine table, a mounting frame, a guide rod, an upper bag pressing seat plate, a lower bag pressing seat plate, a knife holder vertical rod and a driving cylinder.

[0008] The mounting frame is mounted on the machine table, and the mounting frame is provided with a mounting crossbeam plate parallel to the machine table; the guide rod is uprightly connected between the mounting crossbeam plate and the machine table, and the number of the guide rods is two, and the two guide rods are arranged side by side; the two ends of the upper pressure bag seat plate are respectively connected to the two guide rods through a first linear bearing, and an upper pressure bag head is provided below the upper pressure bag seat plate; the two ends of the lower pressure bag seat plate are respectively connected to the two guide rods through a second linear bearing, and are located below the upper pressure bag seat plate, a lower pressure bag head is provided above the lower pressure bag seat plate, and the lower part of the lower pressure bag seat plate is connected by a spring Machine table; slots are formed in the upper and lower bag pressing heads, and the slots of the upper bag pressing head can be connected with the slots of the lower bag pressing head to form a tool activity space slot; the two tool holder vertical rods extend upward from the machine table, respectively penetrate the lower bag pressing seat plate to the tool activity space slot, and a bag cutting tool accommodated in the tool activity space slot is connected between the two tool holder vertical rods; the driving cylinder is fixed below the mounting crossbeam plate, and the output shaft of the driving cylinder is connected to the upper bag pressing seat plate, which is used to drive the upper bag pressing seat plate to abut against the lower bag pressing seat plate, so that the lower bag pressing seat plate compresses the spring to make the bag cutting tool move relative to the tool activity space slot.

[0009] Preferably, the spring is sleeved on the guide rod, one end of the spring abuts against the machine table, and the other end is connected to the second linear bearing on the lower pressure bag seat plate.

[0010] Preferably, the two ends of the bag cutting tool are respectively fixed to the top ends of the two tool holder vertical rods by screws, and the driving cylinder is fixed to the mounting crossbeam plate by screws.

[0011] Preferably, the upper pressing bag seat plate and the lower pressing bag seat plate are both rectangular metal plates parallel to the machine table surface.

[0012] Preferably, when the spring is in its original length state, the bag cutting tool is located in the slot of the bag pressing head and is lower than the top surface of the bag pressing head.

[0013] Preferably, the bag making machine further comprises a winding mechanism for winding the packaging bag film passing between the upper bag pressing head and the lower bag pressing head.

[0014] Preferably, a scale ruler is provided on the edge of the upper pressure bag seat plate.

[0015] The technical effects achieved by the technical solution of this utility model mainly include:

[0016] The cutting tool is moved by the upper and lower bag pressing heads, and the cutting tool is cut by the upper and lower bag pressing heads. The upper and lower bag pressing heads are connected to form a tool movement space groove to accommodate the bag cutting tool. When the upper and lower bag pressing heads abut against the lower bag pressing heads, the packaging bag film between the two is pressed tightly. As the upper and lower bag pressing heads push the lower and lower bag pressing heads downward, the packaging bag film is driven to move relative to the bag cutting tool, and the packaging bag film is cut by the bag cutting tool. Since the packaging bag film is always pressed tightly by the upper and lower bag pressing heads on both sides of the cutting position when the bag making machine is used for cutting, the stability of the cutting process can be ensured, the deviation of the packaging bag film can be effectively prevented, and the stable operation of the bag making machine can be maintained, thereby ensuring production efficiency and the qualified rate of finished products.

[0017] The bag making machine has a simple principle, is easy to construct and requires low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the bag cutting device of the bag making machine provided by the present invention;

[0019] Figure 2 To correspond Figure 1 A partial enlarged view of the circular dotted box area A;

[0020] Figure 3 It is a side structural diagram of the bag cutting device;

[0021] Figure 4 It is a schematic diagram of the docking of the upper bag pressing head and the lower bag pressing head in the bag cutting device.

[0022] The reference numerals in the above drawings are:

[0023] Machine table 1;

[0024] Mounting frame 2, mounting crossbeam plate 21;

[0025] Guide rod 3;

[0026] Upper pressing bag seat plate 4, first linear bearing 41, upper pressing bag head 42, scale ruler 43;

[0027] The pressing bag seat plate 5, the tool movable space groove 50, the second linear bearing 51, the pressing bag head 52, and the spring 53;

[0028] Tool holder vertical rod 6, bag cutting tool 61;

[0029] Driving cylinder 7;

[0030] Winding mechanism 8. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the present invention more apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the present invention shown in and described with reference to the accompanying drawings are merely exemplary, and the present invention is not limited to these embodiments.

[0032] In order to avoid obscuring the present invention due to unnecessary details, the accompanying drawings only show structures and / or processing steps that are closely related to the solution according to the present invention, while omitting other details that are not relevant. Figure 2 The wavy lines in represent that other extension structures are omitted to clearly show other structures of the bag cutting device. Similarly, Figure 4 In order to clearly show the bag cutting tool 61 in the tool activity space slot 50 and its positional relationship relative to the upper bag pressing head 42 and the lower bag pressing head 52 described below, other structures that may block the above content or are unnecessary are hidden.

[0033] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a bag cutting device for a bag making machine, which includes a machine table 1, a mounting frame 2, a guide rod 3, an upper bag pressing seat plate 4, a lower bag pressing seat plate 5, a knife holder vertical rod 6 and a driving cylinder 7.

[0034] Combine Figure 3 As shown, the mounting frame 2 is mounted on the machine table 1, and a mounting crossbeam plate 21 parallel to the machine table 1 is provided on the mounting frame 2;

[0035] The guide rod 3 is vertically connected between the mounting crossbeam plate 21 and the machine table 1. There are two guide rods 3, and the two guide rods 3 are arranged side by side.

[0036] The two ends of the upper pressing bag seat plate 4 are respectively sleeved on the two guide rods 3 through the first linear bearings 41, and an upper pressing bag head 42 is provided below the upper pressing bag seat plate 4;

[0037] The two ends of the lower pressure bag seat plate 5 are respectively sleeved on the two guide rods 3 through the second linear bearing 51, and are located below the upper pressure bag seat plate 4. A lower pressure bag head 52 is provided above the lower pressure bag seat plate 5, and the lower part of the lower pressure bag seat plate 5 is connected to the machine table 1 through a spring 53. Slots are formed in the upper pressure bag head 42 and the lower pressure bag head 52. The slot of the upper pressure bag head 42 can be connected with the slot of the lower pressure bag head 52 to form a tool activity space slot 50;

[0038] The two tool holder vertical rods 6 extend upward from the machine table 1, respectively penetrate the lower pressure bag seat plate 5 to the side of the tool activity space groove 50, and are combined with the tool holder vertical rods 6 to ... Figure 4As shown, a bag cutting tool 61 accommodated in the tool activity space slot 50 is connected between the two tool holder vertical rods 6;

[0039] The driving cylinder 7 is fixed below the mounting crossbeam plate 21, and the output shaft of the driving cylinder 7 is connected to the upper bag pressing seat plate 4, which is used to drive the upper bag pressing seat plate 4 to abut against the lower bag pressing seat plate 5, so that the lower bag pressing seat plate 5 compresses the spring 53, so that the bag cutting tool 61 moves relative to the tool active space groove 50.

[0040] The bag cutting device of the bag making machine provided by the embodiment of the present invention is that the packaging bag film passes through the space between the upper bag pressing head 42 and the lower bag pressing head 52 before the bag is not connected. When the driving cylinder 7 drives the upper bag pressing seat plate 4 to descend until its upper bag pressing head 42 abuts against the lower bag pressing head 52 of the lower bag pressing seat plate 5, the packaging bag film is pressed tightly by the upper bag pressing head 42 and the lower bag pressing head 52, and the packaging bag film is fixed on both sides of the tool activity space groove 50 before being cut. As the driving cylinder 7 continues to drive the upper bag pressing seat plate 4 to descend together with the lower bag pressing seat plate 5, the lower bag pressing seat plate 5 is compressed against the machine table. 1, as the upper bag pressing seat plate 4 and the lower bag pressing seat plate 5 are lowered, and the bag cutting tool 61 located in the tool activity space groove 50 is connected to the fixed tool holder vertical rod 6, the bag cutting tool 61 and the tool activity space groove 50 and the compressed packaging bag film move relative to each other, so that the packaging bag film can be cut in a stable state at all times, effectively preventing the packaging bag film from deflecting during the cutting process, ensuring the normal cutting operation of the packaging bag film, maintaining the stable operation of the bag making machine, and avoiding affecting the production efficiency and the qualified rate of the finished product.

[0041] After the packaging bag film is cut, the driving cylinder 7 retracts its driving rod and drives the upper bag pressing seat plate 4 to rise and return to its initial position, and the lower bag pressing seat plate 5 will also rise and return to its initial position under the elastic force of the spring 53 to restore its original length. The packaging bag film can pass smoothly through the space between the upper bag pressing head 42 and the lower bag pressing head 52 again. The output shaft of the driving cylinder 7 can complete the stable cutting of the packaging bag through one back and forth stroke, which is simple to operate and fast.

[0042] Specifically, the spring 53 is sleeved on the guide rod 3, with one end abutting against the machine table 1 and the other end connected to the second linear bearing 51 on the lower pressure bag seat plate 5. Therefore, the expansion and contraction path of the spring 53 coincides with the movement path of the second linear bearing 51 of the lower pressure bag seat plate 5 along the guide rod 3, which is conducive to the stability of the lower pressure bag seat plate 5 during its lifting and lowering movement.

[0043] The two ends of the bag cutting tool 61 are respectively fixed to the top ends of the two tool holder vertical rods 6 by screws, and the driving cylinder 7 is fixed to the mounting crossbeam plate 21 by screws. The structure is evenly distributed in force, easy to build, and has low production cost.

[0044] The upper pressing bag seat plate 4 and the lower pressing bag seat plate 5 are both rectangular metal plates parallel to the machine table 1. The rectangular metal plates are easy to produce and process, are stable enough as a bearing structure, and remain parallel to each other to ensure coordination of lifting movements.

[0045] In order to allow the packaging bag film to pass smoothly through the space between the upper bag pressing head 42 and the lower bag pressing head 52 at nodes other than the cutting process, when the spring 53 is in its original length state, the bag cutting tool 61 is in the groove of the lower bag pressing head 52 and is lower than the top surface of the lower bag pressing head 52.

[0046] Furthermore, in the embodiment of the present invention, the bag making machine further includes a winding mechanism 8 for winding the packaging bag film passing through the upper bag pressing head 42 and the lower bag pressing head 52 .

[0047] In this embodiment, a scale ruler 43 is provided on the edge of the upper pressing bag seat plate 4. The scale ruler 43 extends along the length direction of the upper pressing bag seat plate 4. The width of the packaging bag film passing through the space between the upper pressing bag head 42 and the lower pressing bag head 52 can be measured, which is convenient for confirmation during operation.

[0048] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0049] The above is only a specific implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A bag cutting device for a bag making machine, characterized in that: include: Machine table (1); A mounting frame (2), the mounting frame (2) being mounted on the machine table (1), and the mounting frame (2) being provided with a mounting crossbeam plate (21) parallel to the machine table (1); A guide rod (3), wherein the guide rod (3) is vertically connected between the mounting crossbeam plate (21) and the machine table (1), and the number of the guide rods (3) is two, and the two guide rods (3) are arranged side by side; An upper pressing bag seat plate (4), both ends of which are sleeved on two guide rods (3) via first linear bearings (41), and an upper pressing bag head (42) is provided below the upper pressing bag seat plate (4); A lower pressure bag seat plate (5), the two ends of which are respectively sleeved on two guide rods (3) through second linear bearings (51), and are located below the upper pressure bag seat plate (4); a lower pressure bag head (52) is provided above the lower pressure bag seat plate (5); the lower part of the lower pressure bag seat plate (5) is connected to the machine table (1) through a spring (53); slots are formed in the upper pressure bag head (42) and the lower pressure bag head (52); the slots of the upper pressure bag head (42) can be connected to the slots of the lower pressure bag head (52), and are connected to form a tool activity space slot (50); A tool holder vertical rod (6), wherein two of the tool holder vertical rods (6) extend upward from the machine table (1), respectively penetrate the lower bag pressing seat plate (5) to the side of the tool activity space groove (50), and a bag cutting tool (61) accommodated in the tool activity space groove (50) is connected between the two tool holder vertical rods (6); A driving cylinder (7) is fixed below the mounting crossbeam plate (21), and an output shaft of the driving cylinder (7) is connected to the upper bag pressing seat plate (4) for driving the upper bag pressing seat plate (4) to abut against the lower bag pressing seat plate (5), so that the lower bag pressing seat plate (5) compresses the spring (53) to move the bag cutting tool (61) relative to the tool activity space groove (50).

2. The bag cutting device of the bag making machine according to claim 1, characterized in that: The spring (53) is sleeved on the guide rod (3), one end of which abuts against the machine table (1), and the other end of which is connected to the second linear bearing (51) on the lower pressure bag seat plate (5).

3. The bag cutting device of the bag making machine according to claim 1, characterized in that: The two ends of the bag cutting tool (61) are respectively fixed to the top ends of the two tool holder vertical rods (6) by screws, and the driving cylinder (7) is fixed to the mounting crossbeam plate (21) by screws.

4. The bag cutting device of the bag making machine according to claim 1, characterized in that: The upper pressing bag seat plate (4) and the lower pressing bag seat plate (5) are both rectangular metal plates parallel to the machine table (1).

5. The bag cutting device of the bag making machine according to claim 1, characterized in that: When the spring (53) is in its original length, the bag cutting tool (61) is located in the slot of the bag pressing head (52) and is lower than the top surface of the bag pressing head (52).

6. The bag cutting device of the bag making machine according to claim 1, characterized in that: The bag making machine further comprises a rolling mechanism (8) for rolling up the packaging bag film passing between the upper bag pressing head (42) and the lower bag pressing head (52).

7. The bag cutting device of the bag making machine according to claim 1, characterized in that: A scale ruler (43) is provided on the edge of the upper pressure bag seat plate (4).

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