Bag making machine and plastic bag

Abstract

The utility model relates to the technical field of plastic bag manufacturing equipment, and discloses a bag making machine and a plastic bag, the bag making machine comprises a feeding roller, a feeding roller, a feeding roller, a feeding roller and a discharging roller, the feeding roller can be used for installing a raw material roll film for producing the plastic bag; the traction rollers can be used for flattening and conveying the raw material roll film to one side far away from the discharging roller; the transverse heat sealing cutter is used for transversely sealing the raw material roll film; the longitudinal heat-sealing cutter is used for longitudinally sealing the raw material roll film; the transverse heat sealing cutter comprises a straight wall, a first inclined side wall and a second inclined side wall, wherein the first inclined side wall and the second inclined side wall are arranged on the two sides of the straight wall. The included angle between the first inclined side wall and the straight wall and the included angle between the second inclined side wall and the straight wall are obtuse angles. And the cutting knife is used for cutting the sealed raw material roll film to obtain the plastic bag. The bag making machine has the advantages that a plastic bag made by the bag making machine is large in bag body and small in bag openings at the two ends, a client can conveniently load and unload a medicine bag, and the bag making machine is simple in overall structure.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic bag manufacturing equipment, in particular to a bag making machine and a plastic bag. Background Art

[0002] Low-density polyethylene plastic bags are common film packaging bags used in the turnover of raw materials in pharmaceutical companies. They can be mass-produced through film blowing machines and bag making machines.

[0003] The bag making machine is generally composed of a transmission mechanism, a heat sealing knife and a cutting knife mechanism. During the manufacturing process, the transmission mechanism transports the blown polyethylene film roll, the hot air knife seals the film, and the cutting knife mechanism cuts the finished plastic bag. The existing bag making machine is suitable for producing plastic bags with the same size of the bag opening and the bag body at both ends. However, when the plastic bags with this structure are used in pharmaceutical factories for loading and placing medicine, on the one hand, it is not convenient to tie the opening when loading the medicine, and on the other hand, the bag opening is too large to be convenient for pouring the medicine into the medicine bottle. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a bag making machine and a plastic bag which can make it convenient for customers to load and place medicines.

[0005] The utility model solves the technical problem by adopting a technical solution of providing a bag making machine for making plastic bags, wherein the plastic bag comprises a bag body, a first bag opening and a second bag opening, wherein the first bag opening and the second bag opening are respectively arranged at two ends of the bag body and are connected to the bag body; when the plastic bag is opened for use, the cross-sectional area of ​​the first bag opening and the cross-sectional area of ​​the second bag opening are both smaller than the cross-sectional area of ​​the bag body; the bag making machine comprises:

[0006] A feeding roller, on which a raw material roll film for producing the plastic bag can be installed;

[0007] A plurality of traction rollers, wherein one end of the raw material roll film away from the unwinding roller can pass through the plurality of traction rollers in sequence, and the traction roller can flatten and transport the raw material roll film to a side away from the unwinding roller;

[0008] A transverse heat-sealing knife and a longitudinal heat-sealing knife are arranged between the plurality of traction rollers, the transverse heat-sealing knife is used to perform transverse sealing on the raw material roll film; the longitudinal heat-sealing knife is used to perform longitudinal sealing on the raw material roll film; wherein the transverse heat-sealing knife comprises a straight wall and a first inclined side wall and a second inclined side wall symmetrically arranged on both sides of the straight wall, and the angle between the first inclined side wall and the straight wall and the angle between the second inclined side wall and the straight wall are both obtuse angles;

[0009] The cutting knife is located on one side of the plurality of traction rollers, and the cutting knife is located on the other side of the plurality of traction rollers; the cutting knife is used to cut the sealed raw material roll film to obtain the plastic bag.

[0010] Furthermore, two transverse heat-sealing knives are provided, and the two transverse heat-sealing knives are spaced apart and symmetrically arranged, and the distance between the two transverse heat-sealing knives is smaller than the width of the raw material roll film.

[0011] Furthermore, an included angle between the first inclined wall and the straight wall, and an included angle between the second inclined wall and the straight wall are greater than or equal to 120 degrees.

[0012] Further, the plurality of traction rollers include a first traction roller, a second traction roller, a third traction roller and a fourth traction roller which are arranged in sequence;

[0013] The transverse heat sealing knife is located between the first traction roller and the second traction roller, and the longitudinal heat sealing knife is located between the third traction roller and the fourth traction roller.

[0014] Furthermore, it also includes a tensioning roller, which is arranged between the second traction roller and the third traction roller. The flattened raw material roll film passes through the tensioning roller, and the tensioning roller is used to tension the flattened raw material roll film.

[0015] Furthermore, the unloading roller is located on a side close to the first traction roller, and the cutting knife is located on a side close to the fourth traction roller.

[0016] Furthermore, the transverse heat sealing knife and the longitudinal heat sealing knife seal the raw material roll film to form the first bag opening and the second bag opening.

[0017] Furthermore, the longitudinal heat sealing knife is a flat knife.

[0018] Furthermore, the length of the second bag opening is greater than the length of the first bag opening.

[0019] The utility model solves the technical problem by adopting a technical solution, and also proposes a plastic bag, which is manufactured by the above-mentioned bag making machine, and the plastic bag comprises:

[0020] A bag body, a first bag opening and a second bag opening, wherein the first bag opening and the second bag opening are respectively arranged at two ends of the bag body and communicated with the bag body;

[0021] When the plastic bag is opened for use, the cross-sectional areas of the first bag opening and the second bag opening are both smaller than the cross-sectional area of ​​the bag body; and one of the first bag opening and the second bag opening can be used to load the medicine bag, and the other of the two can release the loaded medicine bag.

[0022] Compared with the prior art, the utility model has at least the following beneficial effects:

[0023] In the utility model, the bag making machine mainly includes a feeding roller, a plurality of traction rollers, a transverse heat sealing knife, a longitudinal heat sealing knife and a cutting knife. After the raw material roll film is installed on the feeding roller, the raw material roll film is flattened and conveyed by the plurality of traction rollers, and the transverse heat sealing knife and the longitudinal heat sealing knife seal the flattened raw material roll film to obtain the first bag opening and the second bag opening of the plastic bag, and finally the plastic bag is cut by the cutting knife to obtain the plastic bag. The structure of the whole bag making machine is simple. In addition, the transverse heat sealing knife includes a straight wall and a first inclined side wall and a second inclined side wall respectively inclinedly arranged on both sides of the straight wall, so as to ensure that the size of the first bag opening and the second bag opening sealed by the transverse heat sealing knife is smaller than the size of the bag body. During use, the small size of the first bag opening and the second bag opening is convenient for customers to put in and release the medicine bag, and the large size of the bag body is convenient for customers to accommodate more medicine bags. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the plastic bag of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the bag making machine of the utility model;

[0026] Figure 3 is a schematic cross-sectional view of a transverse heat sealing knife;

[0027] Figure 4 This is a schematic diagram of cutting the raw material roll film after sealing.

[0028] In the figure:

[0029] 1. Plastic bag; 10. Bag body; 11. First bag opening; 12. Second bag opening; 100. Raw material roll film;

[0030] 2. Unwinding roller;

[0031] 31. first traction roller; 32. second traction roller; 33. third traction roller; 34. fourth traction roller;

[0032] 4. Horizontal heat sealing knife; 40. Straight wall; 41. First inclined side wall; 42. Second inclined side wall;

[0033] 5. Longitudinal heat sealing knife;

[0034] 6. Cutting knife;

[0035] 7. Tensioning roller. DETAILED DESCRIPTION

[0036] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0037] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] Embodiment 1:

[0042] like Figure 1As shown, a plastic bag 1 of the present embodiment is manufactured by a bag making machine, and the plastic bag 1 comprises: a bag body 10, a first bag opening 11 and a second bag opening 12, wherein the first bag opening 11 and the second bag opening 12 are respectively arranged at the two ends of the bag body 10 and are connected to the bag body 10. When the plastic bag 1 is opened for use, the cross-sectional area of ​​the first bag opening 11 and the cross-sectional area of ​​the second bag opening 12 are both smaller than the cross-sectional area of ​​the bag body 10; and one of the first bag opening 11 and the second bag opening 12 can be used to load a medicine bag, and the other of the two can release the loaded medicine bag. Preferably, when loading the medicine bag into the plastic bag 1, the plastic bag 1 is hung on the pharmaceutical machine, and in the present embodiment, the length of the second bag opening 12 is set to be greater than the length of the first bag opening 11, and the longer second bag opening 12 is convenient for hanging the plastic bag 1 on the pharmaceutical machine, and the small-sized bag opening is convenient for closing.

[0043] The plastic bag 1 of this embodiment is mainly used for turnover of medicine capsules, that is, the medicine capsules produced by the pharmaceutical machine are put into the plastic bag 1, and then the plastic bag 1 containing the medicine capsules is transported to the packaging factory, and the packaging factory fills the medicine capsules in the plastic bag 1 into medicine bottles. When the customer uses the plastic bag 1, the small-sized first bag opening 11 and the second bag opening 12 are convenient for the customer to put in and release the medicine capsules, and it is convenient to tie the bag opening, and the large-sized bag body 10 is convenient for the customer to accommodate more medicine capsules.

[0044] Embodiment 2:

[0045] like Figure 2-Figure 4 As shown, a bag making machine of this embodiment is used to make the plastic bag 1 in the first embodiment, that is, the plastic bag 1 includes a bag body 10, a first bag opening 11 and a second bag opening 12. When the plastic bag 1 is opened for use, the cross-sectional area of ​​the first bag opening 11 and the cross-sectional area of ​​the second bag opening 12 are both smaller than the cross-sectional area of ​​the bag body 10. The bag making machine mainly includes: a discharge roller 2, a plurality of traction rollers, a tensioning roller 7, a transverse heat sealing knife 4, a longitudinal heat sealing knife 5 and a cutting knife 6, wherein the plurality of traction rollers include a first traction roller 31, a second traction roller 32, a third traction roller 33 and a fourth traction roller 34. Moreover, whether the discharge roller 2, the traction roller or the tensioning roller 7 are rotatable cylinders, the discharge roller 2 is located on the side close to the first traction roller 31, and the cutting knife 6 is located on the side close to the fourth traction roller 34. The cutting knife 6 is used to cut the sealed raw material roll film 100 to obtain the plastic bag 1.

[0046] Specifically, the unwinding roller 2 can be provided with a raw material roll film 100 for producing plastic bags 1 . The raw material roll film 100 is blow-molded and can be purchased in rolls. One roll of raw material roll film 100 can produce multiple plastic bags 1 .

[0047] Among the multiple traction rollers, the end of the raw material roll film 100 away from the unwinding roller 2 can pass through the multiple traction rollers in sequence, and the traction rollers can flatten and transport the raw material roll film 100 to the side away from the unwinding roller 2. After the raw material roll film 100 is flattened, it is convenient for the transverse heat sealing knife 4 and the longitudinal heat sealing knife 5 to seal, and convenient for the cutting knife 6 to cut the prepared plastic bag 1. Among them, the multiple traction rollers include a first traction roller 31, a second traction roller 32, a third traction roller 33 and a fourth traction roller 34 that are sequentially arranged at intervals.

[0048] The transverse heat sealing knife 4 is arranged between the first traction roller 31 and the second traction roller 32, the longitudinal heat sealing knife 5 is arranged between the third traction roller 33 and the fourth traction roller 34, and the tensioning roller 7 is arranged between the second traction roller 32 and the third traction roller 33. The flattened raw material roll film 100 passes through the tensioning roller 7, and the tensioning roller 7 is used to tension the flattened raw material roll film 100. The tensioning roller 7 can ensure that the flattened raw material roll film 100 is in a taut state, which is convenient for heat sealing and cutting. Among them, the transverse heat sealing knife 4 is used to perform transverse sealing on the raw material roll film 100, and the longitudinal heat sealing knife 5 is used to perform longitudinal sealing on the raw material roll film 100. The longitudinal heat sealing knife 5 is a flat knife. In the actual manufacturing process, the raw material roll film 100 enters the transverse heat sealing knife 4 through the first traction roller 31, enters the tensioning roller 7 through the second traction roller 32, enters the longitudinal heat sealing knife 5 through the third traction roller 33, and is cut by the cutting knife 6 after passing through the fourth traction roller 34.

[0049] More specifically, if Figure 3 As shown, the transverse heat sealing knife 4 of this embodiment includes a straight wall 40 and a first inclined side wall 41 and a second inclined side wall 42 symmetrically arranged on both sides of the straight wall 40, and the angle between the first inclined side wall 41 and the straight wall 40 and the angle between the second inclined side wall 42 and the straight wall 40 are both obtuse angles. The specific value of the obtuse angle is optimally greater than or equal to 120 degrees. Preferably, the transverse heat sealing knife 4 of this embodiment can be set to two, and the two transverse heat sealing knives 4 are spaced and symmetrically arranged, and the spacing between the two transverse heat sealing knives 4 is less than the width of the raw material roll film 100. In actual use, the transverse heat sealing knife 4 and the longitudinal heat sealing knife 5 seal the raw material roll film 100 to form the first bag opening 11 and the second bag opening 12. In the manufacturing process of a plastic bag 1, the transverse heat sealing knife 4 needs to perform two sealings, one near the first bag opening 11 and one near the second bag opening 12.

[0050] In actual use, the bag making machine mainly includes a discharge roller 2, multiple traction rollers, a transverse heat sealing knife 4, a longitudinal heat sealing knife 5 and a cutting knife 6. After the raw material roll film 100 is installed on the discharge roller 2, the raw material roll film 100 is flattened and transported by multiple traction rollers, and the transverse heat sealing knife 4 and the longitudinal heat sealing knife 5 seal the flattened raw material roll film 100 to obtain the first bag opening 11 and the second bag opening 12 of the plastic bag 1, and finally it is cut by the cutting knife 6 to obtain the plastic bag 1. The structure of the entire bag making machine is simple. In addition, the transverse heat sealing knife 4 includes a straight wall 40 and a first inclined side wall 41 and a second inclined side wall 42 respectively inclinedly arranged on both sides of the straight wall 40, so as to ensure that the size of the first bag opening 11 and the second bag opening 12 sealed by the transverse heat sealing knife 4 is smaller than the size of the bag body 10.

[0051] In this solution, the plastic bag 1 produced by the bag making machine has a large bag body 10 and small first bag openings 11 and second bag openings 12 at both ends, which is convenient for customers to put in and release medicine bags, and the overall structure of the bag making machine is simple.

Claims

1. A bag making machine for making plastic bags, the plastic bag comprising a bag body, a first bag opening and a second bag opening, the first bag opening and the second bag opening being respectively arranged at two ends of the bag body and communicating with the bag body; when the plastic bag is opened for use, the cross-sectional area of ​​the first bag opening and the cross-sectional area of ​​the second bag opening are both smaller than the cross-sectional area of ​​the bag body; characterized in that: The bag making machine comprises: A feeding roller, on which a raw material roll film for producing the plastic bag can be installed; A plurality of traction rollers, wherein one end of the raw material roll film away from the unwinding roller can pass through the plurality of traction rollers in sequence, and the traction roller can flatten and transport the raw material roll film to a side away from the unwinding roller; A transverse heat-sealing knife and a longitudinal heat-sealing knife are arranged between the plurality of traction rollers, the transverse heat-sealing knife is used to perform transverse sealing on the raw material roll film; the longitudinal heat-sealing knife is used to perform longitudinal sealing on the raw material roll film; wherein the transverse heat-sealing knife comprises a straight wall and a first inclined side wall and a second inclined side wall symmetrically arranged on both sides of the straight wall, and the angle between the first inclined side wall and the straight wall and the angle between the second inclined side wall and the straight wall are both obtuse angles; The cutting knife is located on one side of the plurality of traction rollers, and the cutting knife is located on the other side of the plurality of traction rollers; the cutting knife is used to cut the sealed raw material roll film to obtain the plastic bag.

2. The bag making machine according to claim 1, characterized in that: There are two transverse heat-sealing knives, and the two transverse heat-sealing knives are spaced apart and symmetrically arranged, and the distance between the two transverse heat-sealing knives is smaller than the width of the raw material roll film.

3. The bag making machine according to claim 1, characterized in that: An included angle between the first inclined wall and the straight wall, and an included angle between the second inclined wall and the straight wall are greater than or equal to 120 degrees.

4. The bag making machine according to claim 1, characterized in that: The plurality of traction rollers include a first traction roller, a second traction roller, a third traction roller and a fourth traction roller which are arranged in sequence; The transverse heat sealing knife is located between the first traction roller and the second traction roller, and the longitudinal heat sealing knife is located between the third traction roller and the fourth traction roller.

5. The bag making machine according to claim 4, characterized in that: It also includes a tensioning roller, which is arranged between the second traction roller and the third traction roller. The flattened raw material roll film passes through the tensioning roller, and the tensioning roller is used to tension the flattened raw material roll film.

6. The bag making machine according to claim 4, characterized in that: The unwinding roller is located on a side close to the first traction roller, and the cutting knife is located on a side close to the fourth traction roller.

7. The bag making machine according to claim 1, characterized in that: The transverse heat sealing knife and the longitudinal heat sealing knife seal the raw material roll film to form the first bag opening and the second bag opening.

8. The bag making machine according to claim 1, characterized in that: The longitudinal heat sealing knife is a flat knife.

9. The bag making machine according to claim 1, characterized in that: The length of the second pocket opening is greater than the length of the first pocket opening.

10. A plastic bag manufactured by the bag making machine according to any one of claims 1 to 9, characterized in that: The plastic bag comprises: A bag body, a first bag opening and a second bag opening, wherein the first bag opening and the second bag opening are respectively arranged at two ends of the bag body and communicated with the bag body; When the plastic bag is opened for use, the cross-sectional areas of the first bag opening and the second bag opening are both smaller than the cross-sectional area of ​​the bag body; and one of the first bag opening and the second bag opening can be used to load the medicine bag, and the other of the two can release the loaded medicine bag.

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