Film tearing method

Abstract

The invention relates to the technical field of material unsealing, in particular to a film tearing method, which comprises the following steps of: cutting a plastic film on the surface of a film bag in a gap by using a cutter according to a certain cutting path in the gap by utilizing the gap between bottle openings of a bottle array in the film bag, dividing the plastic film into at least two parts, and then separating each part of the plastic film from a bottle, according to the film tearing method, the outer wall of the bottle cannot be scratched in the operation process, and the working efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of material unsealing, and in particular to a film tearing method. Background Art

[0002] One of the existing packaging methods for vials is to use heat-shrinkable plastic film to package a certain number of bottles in an array, and use the plastic film to completely wrap the bottle array. The plastic film shrinks when heated to make the bottles in close contact, forming a film package with a regular shape.

[0003] Before the bottles are filled, the plastic film of the film package needs to be peeled off, and then the bottles are sent to the filling line. Due to the lack of film stripping equipment for pure plastic film packaging in the industry, the current common stripping method is to manually use tools such as blades to cut the plastic film of the film package to complete the relevant operation. This process is easy to damage the outer wall of the bottle body and the work efficiency is not high. This problem needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the above-mentioned background technology and provide a film tearing method to complete the film tearing work of the film package of a vial or the like.

[0005] The technical solution adopted by the present invention is as follows: A film tearing method, wherein there are gaps between the bottle mouths of the bottle array inside the film package, a cutter cuts the plastic film on the surface of the film package along a certain cutting path in the gap to divide it into at least two parts, and then separates each part of the plastic film from the bottle to realize film tearing of the film package.

[0006] In a further embodiment, the cutting path includes a longitudinal path extending along the longitudinal gap and a transverse path extending along the transverse gap, the transverse path intersecting the longitudinal path, the number of the longitudinal path and the transverse path is at least one, and the number of the other is at least two, thereby cutting out a first portion of the plastic film within the range of the cutting path, and the first portion is completely or partially disconnected from the rest of the plastic film.

[0007] In a further embodiment, the longitudinal path extends along the gaps between the bottle openings of two longitudinally adjacent rows of bottles to form a straight line, a triangular wave curve, an S-shaped wave curve or a trapezoidal wave curve.

[0008] In a further embodiment, the transverse path extends along the gaps between the bottle openings of two transversely adjacent rows of bottles to form a triangular wave curve, an S-shaped wave curve or a trapezoidal wave curve.

[0009] In a further embodiment, the tool has at least two longitudinal knives and at least one transverse knife, the cutting edge shape of the longitudinal knives is the same as the longitudinal path, and the cutting edge shape of the transverse knife is the same as the transverse path.

[0010] In a further embodiment, the cutting edge of at least one of the longitudinal knife and the transverse knife is serrated.

[0011] In a further solution, when the knife cuts the plastic film, the moving direction of the knife cutting edge is perpendicular to the plane where the plastic film is located.

[0012] In a further solution, when the cutter cuts the plastic film, pressure is applied from all sides of the film package to closely arrange the bottles in the film package.

[0013] In a further solution, a suction cup, a robot or a human being is used to grab the corresponding portion of the plastic film and displace it relative to the bottle array, so that each portion of the plastic film is separated from the bottle.

[0014] In a further solution, after grabbing the portion of the plastic film outside the cutting path, the portion of the plastic film is shaken a certain number of times.

[0015] The beneficial effects of the present invention are as follows: the present invention utilizes the gaps between the bottle mouths of the bottles in a row to cut the plastic film on the bottle mouth side of the film package longitudinally and transversely, the plastic film in the cutting path is completely separated from the rest of the plastic films or partially connected, and then each part of the plastic film is separated from the bottle array, the outer wall of the bottle will not be scratched during the operation, the saw teeth of the cutting blade of the tool can quickly complete the cutting action, and the working efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the cutting path of a cutter on a membrane package in an embodiment of the present invention.

[0017] Figure 2 Schematic diagram of the gap at the bottle mouth in an embodiment of the present invention.

[0018] Figure 3 This is a schematic structural diagram of one implementation of a tool in an embodiment of the present invention.

[0019] Figure 4 This is a structural schematic diagram of a second implementation mode of a tool in an embodiment of the present invention.

[0020] Figure 5 This is one of the schematic diagrams of the cutting edge structure of the tool in the embodiment of the present invention.

[0021] Figure 6 This is the second schematic diagram of the cutting edge structure of the tool in the embodiment of the present invention.

[0022] Figure 7 This is one of the schematic diagrams of the structure after the plastic film is cut in an embodiment of the present invention.

[0023] Figure 8This is the second structural schematic diagram of the plastic film after cutting in the embodiment of the present invention.

[0024] The figure includes: film package 100, bottle array 101, gap 101.1, plastic film 102, first part 102.1, second part 102.2, tool 200, longitudinal knife 201, transverse knife 202, branch 203, large saw teeth 204.1, small saw teeth 204.2, and cutting path 300. DETAILED DESCRIPTION

[0025] In order to enable ordinary technicians in the field to more clearly understand the objectives, technical solutions and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the following embodiments.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] The film tearing method provided in the embodiment of the present invention is mainly used to tear off the outer packaging film of the vial film package 100, and can obviously also be used for film tearing operations similar to the film package 100. Since the vials are arranged in rows and columns in the film package 100, the shape of the vial film package 100 is relatively regular. For the sake of distinction, in the following description, the side where the vial mouth is located is referred to as the front side of the film package 100.

[0028] like Figure 2 As shown, since the diameter of the mouth of the vial is smaller than the diameter of the bottle body, when two bottles are closely arranged, there will be a gap 101.1 between the bottle mouths, which provides favorable conditions for the cutter 200 to cut the plastic film 102.

[0029] In this embodiment, the cutter 200 is used to cut the plastic film 102 on the front side of the film package 100 along a certain cutting path 300 in the gap 101 . 1 to divide it into at least two parts, and each part of the plastic film 102 is separated from the bottle array 101 to achieve film tearing of the film package 100 .

[0030] like Figure 1As shown, in one embodiment, the cutting path 300 includes two longitudinal paths extending along the longitudinal gap 101.1 and two transverse paths extending along the transverse gap 101.1. The two transverse paths intersect with the two longitudinal paths to form an approximately rectangular cutting path 300. The first part 102.1 of the plastic film 102 is cut within the cutting path 300, and the rest is the second part 102.2 of the plastic film 102. Figure 7 As shown, the first portion 102.1 is completely disconnected from the second portion 102.2.

[0031] In another embodiment, the cutting path 300 includes two longitudinal paths extending along the longitudinal gap 101.1 and a transverse path extending along the transverse gap 101.1, the transverse path intersecting the longitudinal path, and the first part 102.1 of the plastic film 102 is cut within the range of the cutting path 300, and the rest is the second part 102.2 of the plastic film 102, such as Figure 8 As shown, the first part 102.1 and the second part 102.2 are partially disconnected, and one side is still connected together.

[0032] In another embodiment, the cutting path includes a longitudinal path extending along the longitudinal gap and two transverse paths extending along the transverse gap, the transverse paths intersecting with the longitudinal paths, and the first part of the plastic film can also be cut within the cutting path, and the rest is the second part of the plastic film, the first part and the second part are partially disconnected, and one side is still connected together.

[0033] In other embodiments, there may be three or more longitudinal paths and transverse paths, dividing the plastic film 102 into three or more parts.

[0034] like Figure 1 , Figure 3 , Figure 4 As shown, the longitudinal path extends along the gap 101.1 between the bottle openings of two adjacent rows of bottles in the longitudinal direction, and should avoid the outer wall of the bottle opening as much as possible during the extension. The extension can be made in a straight line, a triangular wave curve, an S-shaped wave curve or a trapezoidal wave curve. Figure 1 As shown, the transverse path extends along the gaps 101.1 between the bottle openings of two transversely adjacent rows of bottles, and may extend in a triangular wave curve, an S-shaped wave curve, or a trapezoidal wave curve.

[0035] In this embodiment, the longitudinal path can be within the gap 101.1 between the bottle mouths of any two rows of bottles, and it is recommended to be as close as possible to the gap 101.1 at the edge of the film package 100, that is, the gap 101.1 between the outermost row and the second outermost row of bottles. The transverse path is similar, so that the area of ​​the first part 102.1 of the plastic film 102 that is easily removed within the cutting range can be expanded as much as possible. After the longitudinal path and the transverse path intersect, they continue to extend outward to form branches 203 at the corners of the film package 100, which is convenient for cutting the corners of the film package 100 for subsequent film tearing operations.

[0036] In this embodiment, the tool 200 has two longitudinal blades 201 and two transverse blades 202. The longitudinal blades 201 and the transverse blades 202 intersect each other. The longitudinal blades 201 and the transverse blades 202 can be connected as one or separated. The contour of the tool 200 (the projection of the tool 200 on the front of the plastic film 102) determines the contour of the cutting path 300. In this embodiment, the shape of the cutting edge of the longitudinal blade 201 is the same as the longitudinal path, and the shape of the cutting edge of the transverse blade 202 is the same as the transverse path. In order to cut the plastic film 102 more quickly, the cutting edge of at least one of the longitudinal blades 201 and the transverse blades 202 is serrated, which can be as follows: Figure 5 The serration 204.1 shown in the figure or the Figure 6 The shape of the small saw teeth 204.2 is shown.

[0037] In this embodiment, when the cutter 200 cuts the plastic film 102, the moving direction of the cutting edge of the cutter 200 is perpendicular to the front of the film package 100, that is, parallel to the axis of the bottle, and the power for the cutter 200 to move can be provided by manual, mechanical hand or linear reciprocating mechanism. When the cutter 200 cuts the plastic film 102, pressure can be applied to the film package 100 from all sides, so that the bottles in the film package 100 are closely arranged, and the phenomenon of interference with the cutter 200 due to bottle misalignment is reduced.

[0038] In this embodiment, after the cutter 200 completes the cutting, the first part 102.1 and the second part 102.2 of the plastic film 102 are grabbed by a suction cup, a robot or a human being, and then the grabbed plastic film 102 is moved by the suction cup, a robot or a human being for a certain distance to separate the two parts of the plastic film 102 from the bottle. Before the plastic film 102 is moved, since the second part 102.2 of the plastic film 102 still has four sides surrounding the bottle array 101, after grabbing the second part 102.2 of the plastic film 102 outside the range of the cutting path 300, the suction cup, a robot or a human being grabs the second part 102.2 of the plastic film 102 and shakes it a certain number of times to loosen the plastic film 102 for removal. When the cut plastic film 102 is three or more parts, the operation is similar.

[0039] In this embodiment, the cutter 200 moves toward the front of the film package 100, and the cutting edge of the cutter 200 pierces the plastic film 102 from the gap at the bottle mouth. The plastic film 102 can be cut in a single pass, and the outer wall of the bottle can be avoided without damaging the bottle body.

[0040] The above is only a preferred embodiment of the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A film tearing method, characterized in that: There are gaps (101.1) between the bottle mouths of the bottle array (101) inside the film package (100), and the cutter (200) cuts the plastic film (102) on the surface of the film package (100) along a certain cutting path (300) in the gap (101.1) to separate the plastic film (102) into at least two parts, and then separates each part of the plastic film (102) from the bottle, thereby achieving film tearing of the film package (100).

2. The film peeling method according to claim 1, characterized in that: The cutting path (300) comprises a longitudinal path extending along the longitudinal gap (101.1) and a transverse path extending along the transverse gap (101.1), the transverse path intersecting the longitudinal path, the number of one of the longitudinal path and the transverse path being at least one, and the number of the other being at least two, so that a first portion (102.1) of the plastic film (102) is cut within the range of the cutting path (300), and the first portion (102.1) is completely or partially disconnected from the rest of the plastic film (102).

3. The film peeling method according to claim 2, characterized in that: The longitudinal path extends along the gaps (101.1) between the bottle mouths of two longitudinally adjacent rows of bottles, forming a straight line, a triangular wave curve, an S-shaped wave curve or a trapezoidal wave curve.

4. The film peeling method according to claim 2, characterized in that: The transverse path extends along the gaps (101.1) between the bottle mouths of two transversely adjacent rows of bottles, forming a triangular wave curve, an S-shaped wave curve or a trapezoidal wave curve.

5. The film tearing method according to any one of claims 2 to 4, characterized in that: The tool (200) has at least two longitudinal knives (201) and at least one transverse knife (202), the cutting edge shape of the longitudinal knife (201) being the same as the longitudinal path, and the cutting edge shape of the transverse knife (202) being the same as the transverse path.

6. The film peeling method according to claim 5, characterized in that: The cutting edge of at least one of the longitudinal knife (201) and the transverse knife (202) is serrated.

7. The film peeling method according to claim 5, characterized in that: When the knife (200) cuts the plastic film (102), the moving direction of the cutting edge of the knife (200) is perpendicular to the plane where the plastic film (102) is located.

8. The film tearing method according to any one of claims 1 to 4, characterized in that: When the cutter (200) cuts the plastic film (102), pressure is applied from all sides of the film package (100) so that the bottles in the film package (100) are closely arranged.

9. The film tearing method according to any one of claims 1 to 4, characterized in that: A suction cup, a robot arm or a human hand is used to grab the corresponding portion of the plastic film (102) and displace it relative to the bottle array (101), so that each portion of the plastic film (102) is separated from the bottle.

10. The film peeling method according to claim 9, characterized in that: After grabbing a portion of the plastic film (102) outside the range of the cutting path (300), the portion of the plastic film (102) is shaken a certain number of times.

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