Bag making device

Abstract

The present invention discloses a bag making device, wherein during the bag making process, a first mold and a second mold are fitted together. A first welding groove and a second welding groove form a welding cavity and weld the edges of a soft bag together. A cutter in a slit can cut between the soft bags. The welding groove group can complete the welding of a plurality of soft bags at one time, a corner cutter in a second slit will cut the rounded corners of the soft bags at the edge of the welding groove group, and a side cutter in a first slit will cut two groups of soft bags. Only one side cutter is used to cut between the two groups of soft bags, so there is no need to reserve a cutting margin, thereby avoiding waste edges during the bag making process.

Description

Technical Field

[0001] The present invention relates to the technical field of bag making equipment, in particular to a bag making device. Background Art

[0002] The non-PVC soft bag is formed by welding two layers of non-PVC film and a mouth tube through a bag-making mold under a certain pressure, time and temperature. The mouth tube connects the inside and outside of the soft bag between the two layers of non-PVC film. The bag-making mold also completes the cutting of the soft bag. The shape of the mold welding area is the shape of the bag body. The cutter is set on the periphery of the mold welding area and cuts the bag body along the shape of the welding area. In order to ensure that the edge of the soft bag is fully welded, the existing bag-making equipment needs to leave a cutting margin. The cutting margin will form waste edges, resulting in a reduced utilization rate of the non-PVC film and an increase in the production cost of the enterprise.

[0003] Therefore, how to avoid the generation of waste edges in the bag making process is a technical problem that technicians in this field need to solve urgently. Summary of the invention

[0004] The object of the present invention is to provide a bag making device, in which only one trimming knife is arranged in the cutting seams on both sides of the first welding groove group, so there is no need to reserve cutting margin, thus avoiding the generation of waste edges in the bag making process.

[0005] To achieve the above-mentioned purpose, the present invention provides a bag making device, including a first mold and a second mold, the first mold is provided with a first welding groove, the second mold is provided with a second welding groove, the positions of the first welding groove and the second welding groove correspond to each other, and the two can be assembled to form a welding cavity, the left and right sides of the first welding groove are slits corresponding to the left and right sides of the soft bag respectively, the first welding grooves in the first mold are arranged side by side to form a welding groove group, the welding groove group is close to the slits on both sides of the first mold respectively The first slit is provided with a side cutting knife corresponding to the side edge of the soft bag and a corner cutting knife corresponding to the rounded corner of the soft bag, the second slit is provided with the corner cutting knife, and the corner cutting knives of the first slit and the second slit correspond to the first welding groove where they are located respectively.

[0006] Preferably, the welding groove group includes at least two of the first welding grooves, the slit between two adjacent first welding grooves is a third slit, and the third slit is provided with the edge cutting knife and the corner cutting knife corresponding to the two adjacent first welding grooves.

[0007] Preferably, the first cutting seam is provided with one edge cutting knife and two corner cutting knives respectively located at both ends of the edge cutting knife, the two corner cutting knives respectively correspond to the rounded corners of the upper and lower parts of the soft bag, and the edge cutting knife and the two corner cutting knives form an integrally formed first cutting knife.

[0008] Preferably, the third cutting seam is provided with one edge cutting knife and four corner cutting knives, wherein two of the corner cutting knives are connected to one end of the edge cutting knife and respectively correspond to the rounded corners of the upper part of the soft bags on both sides, and the other two corner cutting knives are connected to the other end of the edge cutting knife and respectively correspond to the rounded corners of the lower part of the soft bags on both sides, and the edge cutting knife and the four corner cutting knives form an integrally formed third cutting knife.

[0009] Preferably, the second cutting slit is further provided with a margin knife connected to the corner cutting knife and extending toward the side edge of the first welding groove close to the side where the second cutting slit is located.

[0010] Preferably, the spacing distance between the theoretical dividing lines between the front end soft bags of the excess knife is not greater than a preset distance.

[0011] The above technical solution has the following beneficial effects:

[0012] During the bag making process of the bag making device, the first mold and the second mold are fitted. The first welding groove and the second welding groove form a welding cavity and weld the edges of the soft bag together. The cutter in the slit can cut between the soft bags. The welding groove group can complete the welding of several soft bags at one time, the corner cutter in the second slit will cut the rounded corners of the soft bags at the edge of the welding groove group, and the edge cutter in the first slit will cut the two groups of soft bags. Only one edge cutter is used to cut between the two groups of soft bags, so there is no need to reserve a cutting margin, avoiding the generation of waste edges during the bag making process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of the first mold in the bag making device;

[0015] Figure 2 It is a schematic diagram of the structure of the second mold in the bag making device;

[0016] Figure 3 is a schematic diagram of the structure of the first cutter;

[0017] Figure 4 is a schematic diagram of the structure of the second cutter;

[0018] Figure 5 It is a schematic diagram of the structure of the third cutter.

[0019] in, Figures 1 to 5 The reference numerals in the drawings are:

[0020] The first mold 1 , the second mold 2 , the first cutting knife 3 , the second cutting knife 4 , the third cutting knife 5 , the first welding groove 11 , the second welding groove 21 , the edge cutting knife 101 , the corner cutting knife 102 , and the excess knife 103 . DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Please refer to Figures 1 to 5 , Figure 1 It is a structural schematic diagram of the first mold in the bag making device; Figure 2 It is a schematic diagram of the structure of the second mold in the bag making device; Figure 3 is a schematic diagram of the structure of the first cutter; Figure 4 is a schematic diagram of the structure of the second cutter; Figure 5 It is a schematic diagram of the structure of the third cutter.

[0024] The bag making device provided by the present invention comprises a first mold 1 and a second mold 2. The structures of the first mold 1 and the second mold 2 are respectively as follows: Figure 1 and Figure 2 As shown, the first mold 1 is provided with a first welding groove 11, and the second mold 2 is provided with a second welding groove 21. The positions of the first welding groove 11 and the second welding groove 21 correspond to each other, and the two can be assembled to form a welding cavity. The welding areas of the first welding groove 11 and the second welding groove 21 are both provided with heating rods, and the welding areas form a soft bag by extruding and heating the film material. The film material moves along a fixed direction into between the first mold 1 and the second mold 2, so that the bag-making device can continuously weld and generate a soft bag. Cutting along the theoretical dividing line between two adjacent soft bags can separate the two adjacent soft bags, so the left and right sides of the first welding groove 11 are slits corresponding to the left and right sides of the soft bag respectively, and a cutter that can cut the film material is provided in the slit. In addition, in order to improve the durability of the soft bag, the four corners of the soft bag adopt a rounded structure, so the upper and lower ends of the theoretical dividing line are connected to the rounded cutting line to form the theoretical contour line of the soft bag. The cutter includes a trimming knife 101 corresponding to the theoretical dividing line and a corner cutting knife 102 corresponding to the rounded cutting line. The edge cutting knife 101 and the corner cutting knife 102 can cut the side edges and rounded corners of the soft bag respectively.

[0025] The first welding grooves 11 in the first mold 1 are arranged side by side to form a welding groove group. It should be noted that the welding groove group may include more than two first welding grooves 11, or may include only one first welding groove 11. Of course, the number of second welding grooves 21 in the second mold 2 is equal to the first welding groove 11 and the position corresponds. Therefore, a welding cavity group is formed between the first mold 1 and the second mold 2, and the number of welding cavities in the welding cavity group determines the number of soft bags formed in one processing. The first mold 1 and the second mold 2 can complete the processing of at least one group of soft bags by welding at one time. This application is explained by taking the example that a row of welding groove groups is provided in the first mold 1, and the welding groove group includes 4 first welding grooves 11. Of course, the user can set the number of welding groove groups and the number of first welding grooves 11 in each welding groove group according to needs, and there is no limitation here.

[0026] like Figure 1 As shown, the rightmost slit in the welding slot group is the first slit, the leftmost slit is the second slit, and the third slit is between two adjacent first welding slots 11 in the welding slot group. A side trimming knife 101 and two corner trimming knives 102 are provided in the first slit. The two corner trimming knives 102 are both located on the left side of the side trimming knife 101, corresponding to the shape of the first welding slot 11 on the right, and are respectively connected to the two ends of the side trimming knife 101. The side trimming knife 101 and the two corner trimming knives 102 together form an integrally formed first cutter 3. Two corner trimming knives 102 are provided in the second slit. The two corner trimming knives 102 are both located at the two ends of the leftmost theoretical dividing line, corresponding to the rounded cutting line of the rightmost first welding slot 11. Of course, the first slit and the second slit can also be located at the leftmost and rightmost sides of the welding slot group, respectively. The above setting method is only a specific implementation method, and is not a limitation on the positions of the first slit and the second slit.

[0027] The theoretical dividing lines of the first welding grooves 11 on both sides of the third slit coincide, so the third cutter 5 in the third slit includes one edge cutter 101 and four corner cutters 102. Two of the corner cutters 102 are connected to one end of the edge cutter 101, and correspond to the rounded corners of the upper part of the soft bags on both sides. The other two corner cutters 102 are connected to the other end of the edge cutter 101, and correspond to the rounded corners of the lower part of the soft bags on both sides. The third cutter 5 is also an integrated structure. Of course, the user can also set the edge cutter 101 and the corner cutter 102 in the third slit as a split third cutter as needed, which is not limited here.

[0028] Optionally, in order to ensure that the first cutter 3 can cut the soft bag groups, the second cut is further provided with a margin knife 103, which can make the cutting range slightly exceed the theoretical dividing line, making it easier for the first cutter 3 to cut. Figure 4 As shown, the excess knife 103 is connected to the corner cutting knife 102 and extends to the left. The corner cutting knife 102 and the excess knife 103 in the second slit form a split second cutting knife 4.

[0029] Optionally, there may be a preset angle α between the margin knife 103 and the theoretical dividing line, and the margin knife 103 extends to the left along the preset angle α from the intersection of the angle cutting knife 102 and the theoretical dividing line, and the distance between the front end of the margin knife 103 and the theoretical dividing line is not greater than the preset distance, which is usually 1 mm. Of course, the user can also set it as needed. The smaller the preset angle α, the longer the margin knife 103 can be set. In a specific embodiment of the present application, the preset angle α is 20°. Of course, the user can also set the size of the preset angle α as needed, which is not limited here.

[0030] In this embodiment, the second slit is not provided with a trimming knife 101, so there is no need to reserve a cutting margin between the two groups of soft bags, thus avoiding the generation of waste edges during the bag making process and improving the utilization efficiency of the film material. In addition, a margin knife 103 is provided in the second slit, and the margin knife 103 makes the cutting range slightly exceed the theoretical dividing line, which facilitates the cutting of the first cutter 3 and ensures that the first cutter 3 can cut between the soft bag groups.

[0031] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0032] The bag making device provided by the present invention is introduced in detail above. The principle and implementation mode of the present invention are explained in this article by using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A bag making device, characterized in that: The invention comprises a first mould (1) and a second mould (2), wherein the first mould (1) is provided with a first welding groove (11), and the second mould (2) is provided with a second welding groove (21), the positions of the first welding groove (11) and the second welding groove (21) correspond to each other, and the two can be assembled to form a welding cavity, the left and right sides of the first welding groove (11) are respectively slits corresponding to the left and right sides of a soft bag, the first welding grooves (11) in the first mould (1) are arranged side by side to form a welding groove group, the slits of the welding groove group close to the two sides of the first mould (1) are respectively a first slit and a second slit, the first slit is provided with a side cutting knife (101) corresponding to the side edge of the soft bag and a corner cutting knife (102) corresponding to the rounded corner of the soft bag, the second slit is provided with only the corner cutting knife (102), and the corner cutting knives (102) of the first slit and the second slit respectively correspond to the first welding groove (11) where they are located; The welding groove group comprises more than two of the first welding grooves (11), the slit between two adjacent first welding grooves (11) is a third slit, and the third slit is provided with the edge cutting knife (101) and the corner cutting knife (102) corresponding to the two adjacent first welding grooves (11); The first cutting slit is provided with one edge cutting knife (101) and two corner cutting knives (102) respectively located at the two ends of the edge cutting knife (101), the two corner cutting knives (102) respectively corresponding to the rounded corners of the upper part and the lower part of the soft bag, and the edge cutting knife (101) and the two corner cutting knives (102) form an integrally formed first cutting knife (3); The second cutting seam is also provided with a margin knife (103) connected to the corner cutting knife (102) and capable of causing the cutting range to slightly exceed the theoretical dividing line between two adjacent soft bags.

2. The bag making device according to claim 1, characterized in that: The third cutting seam is provided with one edge cutting knife (101) and four corner cutting knives (102), wherein two of the corner cutting knives (102) are connected to one end of the edge cutting knife (101) and correspond to the rounded corners of the upper part of the soft bags on both sides respectively, and the other two corner cutting knives (102) are connected to the other end of the edge cutting knife (101) and correspond to the rounded corners of the lower part of the soft bags on both sides respectively. The edge cutting knife (101) and the four corner cutting knives (102) form an integrally formed third cutting knife (5).

3. The bag making device according to claim 1 or 2, characterized in that: The distance between the front end of the excess knife (103) and the theoretical dividing line of the soft bag is no greater than a preset distance.

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