Dotted line knife structure for cutting tearing opening of packaging body

Abstract

The utility model discloses a dotted line knife structure for cutting a tearing opening of a packaging body, which comprises a plurality of columnar working parts, a conical cutting part is arranged at the top end of each columnar working part, and a gap is reserved between every two adjacent columnar working parts. The conical cutting part is used for cutting a wrapping film, the working part is used for controlling the virtual cutting ratio, and the problems that when an existing sawtooth-shaped tearing knife is adjusted, a knife point is inserted too deep or too shallow, a tearing opening on a packaging material is exploded or cannot be completely torn and broken due to the fact that the virtual cutting ratio is imbalanced, and stability is poor are solved; the ratio of the dotted lines obtained through cutting can be reflected on the packing material according to the designed ratio, the tearing smoothness of the tearing opening is guaranteed, the quality requirement is met, and the satisfaction degree of consumers is improved; and the cutting device is suitable for coating materials with various thicknesses, and is suitable for cutting under the condition of high elongation of the coating.

Description

Technical Field

[0001] The utility model relates to packaging processing equipment, in particular to a dotted line knife structure for cutting a tearing opening of a packaging body. Background Art

[0002] At present, most of the packaging bodies with tearable extraction ports are flexible packaging bodies formed by plastic films or plastic bags. The extraction ports of Kosla are mainly divided into three types: single-line opening, pure double-line opening, and opening with PVC adhesive and double-line setting. When the packaging material is a composite material product, the single-pack machine dotted line knife is Figure 1 The picture shows a serrated tearing knife. The annular tear-opening packaging body produced by the dotted line knife of a single packaging machine has the problem that the tear strip breaks in the middle or cannot be torn, which brings a bad product experience to consumers and users. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to provide a dotted line knife structure with a stable virtual cutting ratio for cutting the tearing mouth of a packaging body.

[0004] Technical solution: The dotted line knife structure for cutting the tearing opening of the packaging body of the utility model includes a plurality of columnar working parts, each of which is provided with a conical cutting part at the top, and there is a gap between two adjacent columnar working parts. The conical cutting part is used to cut the film, and the working part is used to control the virtual cutting ratio.

[0005] Furthermore, the columnar working part is a cylinder, a square column or a prism.

[0006] Furthermore, the top angle of the conical cutting portion is 30-60°, preferably 50°.

[0007] Furthermore, the height of the tapered cutting portion is 0.2-1.5 mm.

[0008] Furthermore, the gap between two adjacent columnar working parts is 0.25-0.6 mm, preferably 0.5 mm.

[0009] Furthermore, the height of the columnar working part is 10-35 mm, preferably 10 mm.

[0010] Preferably, the dotted line knife structure for cutting the tearing opening of the packaging body further comprises a base, and the columnar working part is mounted on the base to facilitate the installation of the dotted line knife.

[0011] Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. The utility model solves the problem that the tip of the existing serrated tear knife is inserted too deeply or too shallowly during adjustment, resulting in the tearing of the packaging material bursting or not being completely torn apart and poor stability after the virtual cutting ratio is unbalanced; 2. The virtual-real ratio of the dotted line obtained by cutting with the utility model can be reflected on the packaging material according to the designed ratio, ensuring the smoothness of the tearing of the tearing mouth and meeting the quality requirements, thereby improving consumer satisfaction; 3. The utility model is suitable for packaging materials of various thicknesses of film, and is suitable for cutting under high elongation conditions of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of a serrated tearing knife;

[0013] Figure 2 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0014] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0015] The dotted line knife structure for cutting the tearing opening of the packaging body described in the utility model comprises a base 1 and 8 columnar working parts 2, each columnar working part is provided with a conical cutting part 3 at the top, and there is a gap between two adjacent columnar working parts, and the gap is 0.5mm. In this embodiment, the columnar working part can be selected from at least one of a cylinder, a square column or a prism, preferably a square column, and the height of the columnar working part is 10mm. Furthermore, the height of the conical cutting part is 0.2-1.5mm, and the top angle is 50°.

[0016] When the cutter of the utility model is operating on the packaging material, the conical cutting part is used to cut the packaging film, the working part is used to control the virtual cutting ratio, and the working surface stays on the columnar working part. The serrated tearing knife in the prior art stays on the triangular surface of the vertebral body. Compared with the prior art, the utility model ensures that the virtual and real ratios of the tearing opening on the packaging material are consistent, thereby achieving stable quality requirements.

Claims

1. A dotted line knife structure for cutting a tearing opening of a packaging body, characterized in that: It comprises a plurality of columnar working parts (2), each columnar working part is provided with a conical cutting part (3) at the top end, there is a gap between two adjacent columnar working parts (2), and the gap between two adjacent columnar working parts (2) is 0.25-0.6 mm.

2. The dotted line knife structure for cutting the tearing opening of a packaging body according to claim 1, characterized in that: The columnar working part (2) is a cylinder, a square column or a prism.

3. The dotted line knife structure for cutting the tearing opening of a packaging body according to claim 1, characterized in that: The top angle of the conical cutting portion (3) is 30-60°.

4. The dotted line knife structure for cutting the tearing opening of a packaging body according to claim 1, characterized in that: The height of the conical cutting portion (3) is 0.2-1.5 mm.

5. The dotted line knife structure for cutting the tearing opening of a packaging body according to any one of claims 1 to 4, characterized in that: The height of the columnar working part (2) is 10-35 mm.

6. The dotted line knife structure for cutting the tearing opening of a packaging body according to claim 1, characterized in that: It also comprises a base (1), on which the columnar working part (2) is mounted.

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