EVA (Ethylene Vinyl Acetate) buffer tube for seamless laminating film products

Abstract

The utility model provides an EVA (Ethylene Vinyl Acetate) buffer tube for seamless laminated film products, which comprises a paper core and a buffer tube, the paper core is of a conventional hollow cylindrical structure, the buffer tube is wrapped on the outer surface of the paper core, a fixing belt and a limiting groove are arranged on the surface of the buffer tube, and two ends of the fixing belt are respectively connected with two ends of the buffer tube. The limiting groove is formed in the surface of the buffer pipe in an inwards-concave mode, the fixing belt is connected into the limiting groove in a clamped mode, the width and the thickness of the fixing belt are matched with the width and the depth of the limiting groove, and the length of the limiting groove is consistent with the length of the buffer pipe. The front end of the film product is flatly clamped and fixed, the situation that a conventional film product is wound around the buffer pipe to generate wrinkles is avoided, deformation of the film product due to the wrinkles is greatly reduced, and the overall quality of the film product is improved.

Description

Technical Field

[0001] The utility model relates to the field of film buffer tubes, in particular to an EVA buffer tube of a seamless laminated film product. Background Art

[0002] At present, film products are usually transported by wrapping them on the outside of paper tubes. When packaging film products, in order to prevent deformation of film products during transportation, buffer tubes are adhered to the outside of paper tubes to buffer deformation of film products. Among buffer tubes, EVA buffer tubes are the most widely used. However, in the initial process of wrapping conventional film products on buffer tubes, they are generally directly contracted on the buffer tubes. The front end of the film products wrapped in this way is prone to wrinkles on the buffer tube, resulting in deformation of the film products wrapped later, affecting product quality. Summary of the invention

[0003] In view of the above problems, the utility model provides an EVA buffer tube for seamless laminating film products.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an EVA buffer tube for seamless laminated film products, comprising a paper core and a buffer tube, wherein the paper core is a conventional hollow cylindrical structure, the buffer tube is wrapped around the outer surface of the paper core, a fixing belt and a limiting groove are provided on the surface of the buffer tube, the two ends of the fixing belt are respectively connected to the two ends of the buffer tube, the limiting groove is concavely provided on the surface of the buffer tube, the fixing belt is clamped in the limiting groove, the bandwidth and thickness of the fixing belt are adapted to the groove width and groove depth of the limiting groove, and the length of the limiting groove is consistent with the length of the buffer tube.

[0005] Preferably, both ends of the buffer tube are fixedly provided with hard and non-deformable clamping blocks, and the clamping blocks are provided with protruding clamping columns. The clamping column structure is an upper ball and lower column structure, that is, the clamping column is formed by a sphere and a cylinder fixedly connected up and down, and the diameter of the sphere above the clamping column is larger than the diameter of the cylinder below the clamping column. Clamping holes are provided at both ends of the fixing belt, and the inner diameter of the clamping hole is between the diameter of the sphere in the clamping column and the diameter of the cylinder, and the clamping hole is adaptively clamped to the outside of the clamping column.

[0006] Preferably, the bottom of the limiting groove is an inclined surface, which is inclined upward to the surface of the buffer tube. The bottom surface of the fixing belt is also an inclined surface. The bottom surface of the fixing belt has the same inclination angle as the bottom surface of the limiting groove, and the bottom surface of the fixing belt fits tightly against the bottom surface of the limiting groove.

[0007] Preferably, friction strips are evenly arranged on the groove bottom of the limiting groove and the bottom surface of the fixing strip, and the length of the friction strip is consistent with the length of the limiting groove.

[0008] Preferably, the length of the fixing belt is smaller than the distance between the clamping blocks at both ends of the buffer tube, and the difference between the length of the fixing belt and the distance between the clamping blocks is between 1-2 mm.

[0009] Preferably, when the fixing belt is clamped in the limiting groove, the outer surface of the fixing belt and the outer surface of the buffer tube form a complete cylindrical surface.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: compared with the buffer tube wrapped with conventional film products, the utility model fixes the front end of the film product smoothly by means of the cooperation between the fixing belt and the limiting groove, thereby avoiding the wrinkles generated by the conventional film products wrapped with the buffer tube, greatly reducing the deformation of the film product caused by the wrinkles, and improving the overall quality of the film product. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of an EVA buffer tube of a seamless laminating film product of the utility model;

[0012] Figure 2 A schematic diagram of a fixing belt of an EVA buffer tube of a seamless laminating film product of the utility model;

[0013] Figure 3 This is a schematic diagram of the EVA buffer tube limit groove of a seamless laminating film product of the utility model;

[0014] Figure 4 It is a schematic diagram of the clamping connection between the EVA buffer tube limit groove and the fixing belt of a seamless laminating film product of the utility model. DETAILED DESCRIPTION

[0015] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0016] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4An EVA buffer tube of a seamless laminated film product according to an embodiment of the utility model comprises a paper core 1 and a buffer tube 2. The paper core 1 is a conventional hollow cylindrical structure. The buffer tube 2 is wrapped around the outer surface of the paper core 1. A fixing belt 3 and a limiting groove 4 are provided on the surface of the buffer tube 2. The two ends of the fixing belt 3 are respectively connected to the two ends of the buffer tube 2. The limiting groove 4 is concavely provided on the surface of the buffer tube 2. The fixing belt 3 is clamped in the limiting groove 4. The bandwidth and thickness of the fixing belt 3 are adapted to the width and depth of the limiting groove 4. The length of the limiting groove 4 is consistent with the length of the buffer tube 2.

[0017] The buffer tube 2 and the fixing belt 3 are both reshaped from EVA material, so both have a certain degree of elasticity. The elastic fixing belt 3 is clamped with the limiting groove 4. The fixing belt 3 and the limiting groove 4 are used to accommodate the front end of the film product. The front end of the film product is clamped between the fixing belt 3 and the limiting groove 4. After that, the paper core 1 is rotated to start rolling the film product, which effectively avoids the problem of wrinkles that are easy to form before conventional film products are rolled.

[0018] Preferably, both ends of the buffer tube 2 are fixedly provided with hard and non-deformable clamping blocks, and a protruding clamping column 5 is provided on the clamping block. The structure of the clamping column 5 is an upper ball and lower column structure, that is, the clamping column 5 is formed by a sphere and a cylinder fixedly connected up and down, and the diameter of the sphere above the clamping column 5 is larger than the diameter of the cylinder below the clamping column 5. Clamping holes 6 are provided at both ends of the fixing belt 3, and the inner diameter of the clamping hole 6 is between the diameter of the sphere in the clamping column 5 and the diameter of the cylinder, and the clamping hole 6 is adaptively clamped on the outside of the clamping column 5.

[0019] The clamp 5 and the clamp hole 6 are used to firmly clamp the fixing belt 3 into the limiting groove 4 on the surface of the buffer tube 2 to avoid a gap between the fixing belt 3 and the limiting groove 4 to affect the fixing effect.

[0020] Preferably, the bottom of the limiting groove 4 is an inclined surface, and the bottom of the limiting groove 4 is inclined upward to the surface of the buffer tube 2. The bottom surface of the fixing belt 3 is also an inclined surface. The bottom surface of the fixing belt 3 and the bottom surface of the limiting groove 4 have the same inclination angle, and the bottom surface of the fixing belt 3 fits tightly with the bottom surface of the limiting groove 4.

[0021] The limiting groove 4 with an inclined slope at the bottom can minimize the generation of wrinkles on the film product when it is squeezed by the fixing belt 3 and the limiting groove 4, and compared with the limiting groove 4 with a conventional vertical groove wall, the groove edge of the limiting groove 4 with an inclined slope has less impact on the rolling of the film product.

[0022] Preferably, friction belts are evenly arranged on the bottom of the limiting groove 4 and the bottom surface of the fixing belt 3. The length of the friction belt is consistent with the length of the limiting groove 4. The friction belt is used to increase the friction between the limiting groove 4, the fixing belt 3 and the film product, ensuring that the limiting groove 4 and the fixing belt 3 can better clamp the film product, and the front end of the film product will not fall off or loosen when rolling, thereby causing wrinkles.

[0023] Preferably, the length of the fixing belt 3 is smaller than the distance between the clamping blocks at both ends of the buffer tube 2, and the difference between the length of the fixing belt 3 and the distance between the clamping blocks is between 1-2 mm.

[0024] Preferably, when the fixing belt 3 is clamped in the limiting groove 4, the outer surface of the fixing belt 3 and the outer surface of the buffer tube 2 form a complete cylindrical surface, ensuring that when the film product is rolled in the first circle, there will be no gap between the film product and the buffer tube 2 due to the incomplete surface between the fixing belt 3 and the buffer tube 2, resulting in the formation of wrinkles.

[0025] As described above, when the utility model is actually used, the front end of the film product is clamped in the limiting groove 4, so that the front end of the film product is against the vertical groove wall of the limiting groove 4. At this time, the film product and the groove bottom of the limiting groove 4 are flatly fitted, and no wrinkles are generated. The clamping hole 6 on the fixing belt 3 and the clamping 5 on the clamping block are mutually clamped, so that the fixing belt 3 is tightly fitted on the top of the film product. Thus, the fixing belt 3 and the limiting groove 4 cooperate to achieve the effect of clamping the front end of the film product, thereby avoiding the wrinkles caused by conventional winding that affect the quality of the film product.

[0026] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, any changes and modifications made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. An EVA buffer tube for seamless laminating film products, characterized in that: The invention comprises a paper core (1) and a buffer tube (2), wherein the paper core (1) is a conventional hollow cylindrical structure, the buffer tube (2) is wrapped around the outer surface of the paper core (1), the surface of the buffer tube (2) is provided with a fixing belt (3) and a limiting groove (4), the two ends of the fixing belt (3) are respectively connected to the two ends of the buffer tube (2), the limiting groove (4) is concavely arranged on the surface of the buffer tube (2), the fixing belt (3) is clamped in the limiting groove (4), the width and thickness of the fixing belt (3) are adapted to the groove width and groove depth of the limiting groove (4), and the length of the limiting groove (4) is consistent with the length of the buffer tube (2).

2. The EVA buffer tube of the seamless laminating film product according to claim 1, characterized in that: Both ends of the buffer tube (2) are fixedly provided with hard and non-deformable clamping blocks, and the clamping blocks are provided with protruding clamping columns (5). The clamping columns (5) are of an upper ball and lower column structure, that is, the clamping columns (5) are formed by a sphere and a cylinder fixedly connected up and down, and the diameter of the sphere above the clamping column (5) is greater than the diameter of the cylinder below the clamping column (5). Both ends of the fixing belt (3) are provided with clamping holes (6), and the inner diameter of the clamping holes (6) is between the diameter of the sphere in the clamping column (5) and the diameter of the cylinder, and the clamping holes (6) are adaptively clamped to the outside of the clamping column (5).

3. The EVA buffer tube of the seamless laminating film product according to claim 1, characterized in that: The bottom of the limiting groove (4) is an inclined surface, and the bottom of the limiting groove (4) is inclined upward to the surface of the buffer tube (2). The bottom surface of the fixing belt (3) is also an inclined surface, and the bottom surface of the fixing belt (3) and the bottom surface of the limiting groove (4) have the same inclination angle, and the bottom surface of the fixing belt (3) is tightly fitted with the bottom surface of the limiting groove (4).

4. The EVA buffer tube of the seamless laminating film product according to claim 1, characterized in that: Friction belts are evenly arranged on the groove bottom of the limiting groove (4) and the bottom surface of the fixing belt (3), and the length of the friction belt is consistent with the length of the limiting groove (4).

5. The EVA buffer tube of the seamless laminating film product according to claim 1, characterized in that: The length of the fixing belt (3) is smaller than the distance between the clamping blocks at both ends of the buffer tube (2), and the difference between the length of the fixing belt (3) and the distance between the clamping blocks is between 1 and 2 mm.

6. The EVA buffer tube of the seamless laminating film product according to claim 1, characterized in that: When the fixing belt (3) is clamped in the limiting groove (4), the outer surface of the fixing belt (3) and the outer surface of the buffer tube (2) form a complete cylindrical surface.

Images