Fixed packaging wrapping film tester

Abstract

The utility model discloses a fixed packing packaging wrapping film tester, including the portal frame and L type frame of fixed on the test platform, and L type frame has two oblique poles respectively located in the oblique plate and deviates L type frame one side front and rear through the articulated seat swing articulates, and the upper end fixed support of oblique pole is supported in the support rod of L type frame one side, and the surface of two oblique poles all slide sleeve joint has the sliding sleeve, and all fixed have fixed sleeve on two sliding sleeves, and all movable link have movable link in two fixed sleeves, and the lower end of two movable links is rotatoryly connected with the both ends of compression roller, and the compression roller can press in the surface of the film of waiting for measuring, and the surface of movable link is installed between the compression spring of fixed sleeve and compression roller, and the upper end of two movable links is fixedly connected with handle. The utility model discloses a handle along oblique pole up and down push and pull compression roller, and through the oblique pole limit compression spring compression distance, and through compression spring and compression roller to the film of waiting for measuring and bottom film and exert pressure, and do not adopt artificial pressure, reduce artificial operation interference, and improve the test result accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of stretch film quality inspection equipment, specifically a tester for fixed packaging stretch film. Background Technology

[0002] Stretch film, also known as packaging stretch film, is a plastic film made primarily of linear low-density polyethylene (LLDPE). It possesses high tensile strength and retraction force, and is widely used for securing and packaging goods and wrapping pallets. Stretch film offers high-strength protection, with excellent puncture and tear resistance, effectively preventing damage to goods during transportation. It also boasts superior tensile strength, with a typical stretch ratio of 300%-500%, and special films reaching over 600%, significantly reducing film costs. It has excellent self-adhesion, being single- or double-sided, eliminating the need for tape or heat sealing, making it convenient to use. Its high transparency facilitates goods identification and enhances the packaging's perceived quality. Furthermore, it is environmentally friendly and recyclable, meeting environmental requirements and capable of being recycled.

[0003] Wrap films can be categorized by usage method, including manual wrapping film, machine wrapping film, and pre-stretch wrapping film; by material, including polyethylene, polyvinyl chloride, and ethylene-vinyl acetate films, with polyethylene wrapping film being the mainstream; and by film structure, including single-layer wrapping film and multi-layer wrapping film, typically single-sided adhesive. They have diverse applications, widely used in logistics and warehousing, food and beverage, electronics, building materials and chemicals, industrial manufacturing, and e-commerce express delivery.

[0004] To ensure effective protection during use, packaging stretch film undergoes quality testing during both research and development and production. The primary test is adhesion testing, typically conducted using a tensile testing machine, a tension sensor, and computer software. During testing, a piece of stretch film is used as the base film and fixed to an obtuse-angled plate on the tensile testing machine. A strip of the same material is then used as the test film, with one end self-adhesively attached to the base film. A separate roller is used to press the test film firmly against the base film. The other end of the test film is secured with clamps on the tensile testing machine. Tension is applied, and the tension sensor monitors changes in tension as the test film is torn off, thus completing the adhesion test.

[0005] However, in the existing packaging stretch film adhesion test using a tensile testing machine, the pressure applied by the roller during the bonding and fixing of the test film and the base film is affected by the operator's human factors. Different operators or the same operator at different times will apply different pressures, which directly affects the adhesion between the test film and the base film, leading to errors in the test results and thus having shortcomings. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a fixed packaging stretch film tester, which solves the problem that the adhesion between the test film and the base film is easily affected by the pressure applied by the tester when the stretch film is tested by a tensile testing machine, resulting in errors in the test results.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] A fixed packaging stretch film tester includes a gantry frame fixed on a test table, a lifting beam movably connected to the gantry frame, a tension sensor installed below the lifting beam, a fixing clamp installed below the tension sensor for fixing the upper end of the film to be tested, an L-shaped frame fixed to the test table via a connecting seat, an inclined plate for fixing the bottom film placed at an angle inside the L-shaped frame, a knob bolt movably inserted into one side of the L-shaped frame, and a fixing tube fixed to one side of the inclined plate and threadedly connected to the knob bolt. The upper and lower ends of the bottom film pass around the upper and lower edges of the inclined plate respectively and are clamped between the inclined plate and the L-shaped frame. The film to be tested is directly pasted on the surface of the bottom film.

[0009] The L-shaped frame is movably hinged to two inclined rods located in front of and behind the inclined plate on the side away from the L-shaped frame, respectively, via a hinge seat. The upper end of each inclined rod is fixed with a support rod supported on one side of the L-shaped frame. Sliding sleeves are slidably fitted onto the surfaces of both inclined rods. Fixed sleeves are fixed onto each of the two sliding sleeves. Movable rods are movably inserted into each of the two fixed sleeves. The lower ends of the two movable rods are rotatably connected to the two ends of the pressure roller, and the pressure roller can press on the surface of the film to be tested.

[0010] The surface of the movable rod is fitted with a compression spring located between the fixed sleeve and the pressure roller, and the upper ends of the two movable rods are fixedly connected to the handle.

[0011] Preferably, the inclined rod and the inclined plate are parallel to each other.

[0012] Preferably, the two inclined rods are arranged symmetrically back and forth with the inclined plate as the center.

[0013] Preferably, the support rod is L-shaped and is an integral structure with the diagonal rod, and the vertical part of the support rod can be supported on the side of the L-shaped frame.

[0014] Preferably, the pressure roller and the handle are parallel to each other, and the pressure roller is perpendicular to the inclined rod.

[0015] Preferably, the compression springs on the surfaces of the two movable rods have the same shape and specifications.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention features a reversible inclined bar on an L-shaped frame. After the test film and the base film are initially bonded, the push bar is flipped upwards to ensure the support rod is supported on the side of the L-shaped frame. The pressure roller is pushed and pulled up and down along the inclined bar by the handle. The inclined bar limits the compression distance of the pressure spring. Pressure is applied to the test film and the base film by the pressure spring and the pressure roller, without the need for manual pressure application. This reduces human interference and improves the accuracy of test results. It solves the problem that the adhesion between the test film and the base film is easily affected by the pressure applied by the human when the adhesion of the packaging wrapping film is tested by a tensile testing machine, which leads to errors in the test results. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the fixing clamp and tension sensor of this utility model;

[0020] Figure 3 This is a schematic diagram of the corresponding position structure of the L-shaped frame of this utility model;

[0021] Figure 4 This is a partial structural diagram of the pressure roller of this utility model at the corresponding position;

[0022] Figure 5 This is a side view of the L-shaped frame structure at the corresponding position of this utility model;

[0023] Figure 6 This is a partial side view of the structure of the compression spring of this utility model.

[0024] In the diagram: 1. Test bench; 2. Gantry frame; 3. Lifting beam; 4. Tension sensor; 5. Membrane to be tested; 6. Fixing clamp; 7. L-shaped frame; 8. Bottom membrane; 9. Inclined plate; 10. Knob bolt; 11. Fixing tube; 12. Inclined rod; 13. Support rod; 14. Sliding sleeve; 15. Fixing sleeve; 16. Movable rod; 17. Pressure roller; 18. Compression spring; 19. Handle. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1-6As shown, this utility model provides a technical solution: a fixed packaging wrapping film tester, including a gantry frame 2 fixed on a test table 1, a lifting beam 3 movably connected to the gantry frame 2, a tension sensor 4 installed below the lifting beam 3, a fixing clamp 6 installed below the tension sensor 4 for fixing the upper end of the film to be tested 5, an L-shaped frame 7 fixed on the test table 1 via a connecting seat, an inclined plate 9 for fixing the bottom film 8 placed at an angle inside the L-shaped frame 7, a knob bolt 10 movably inserted into one side of the L-shaped frame 7, and a fixing tube 11 fixed to one side of the inclined plate 9 and threadedly connected to the knob bolt 10. The upper and lower ends of the bottom film 8 pass around the upper and lower edges of the inclined plate 9 respectively and are clamped between the inclined plate 9 and the L-shaped frame 7. The film to be tested 5 is directly pasted on the surface of the bottom film 8.

[0027] The L-shaped frame 7 is movably hinged to two diagonal rods 12 located in front of and behind the diagonal plate 9 on the side away from the L-shaped frame 7, respectively. The diagonal rods 12 and the diagonal plate 9 are parallel to each other. The two diagonal rods 12 are symmetrically arranged with the diagonal plate 9 as the center. The upper end of the diagonal rod 12 is fixed with a support rod 13 supporting one side of the L-shaped frame 7. The support rod 13 is L-shaped and is an integral structure with the diagonal rod 12. The vertical part of the support rod 13 can support the side of the L-shaped frame 7.

[0028] Sliding sleeves 14 are slidably sleeved on the surfaces of the two inclined rods 12. Fixed sleeves 15 are fixed on the two sliding sleeves 14. Movable rods 16 are movably inserted into the two fixed sleeves 15. The lower ends of the two movable rods 16 are rotatably connected to the two ends of the pressure roller 17. The pressure roller 17 and the handle 19 are parallel to each other. The pressure roller 17 is perpendicular to the inclined rods 12. The pressure roller 17 can press on the surface of the film 5 to be tested.

[0029] A compression spring 18 is installed on the surface of the movable rod 16 between the fixed sleeve 15 and the pressure roller 17. The compression springs 18 on the surfaces of the two movable rods 16 are identical in shape and specifications. The upper ends of the two movable rods 16 are fixedly connected to the handle 19.

[0030] Working principle:

[0031] Take a piece of stretch film as the base film 8. The base film 8 is pasted along the inclined plate 9, with its upper and lower ends bypassing the upper and lower edges of the inclined plate 9, respectively. Tighten the knob bolt 10 to clamp the base film 8 through the inclined plate 9 and the L-shaped frame 7. Then take another piece of stretch film of the same material as the test film 5. The upper end is fixed by the fixing clip 6, and the lower end is pasted on the base film 8 through self-adhesion along the surface of the base film 8. After the test film 5 and the base film 8 are initially pasted, flip the push rod upward to ensure that the support rod 13 is supported on the side of the L-shaped frame 7. The compression distance of the pressure spring 18 is limited by the inclined rod 12. Push and pull the pressure roller 17 up and down three times along the inclined rod 12 by the handle 19. The pressure spring 18 and the pressure roller 17 apply pressure to the test film 5 and the base film 8 without manual pressure, reducing human operation interference. Then flip the inclined rod 12 downward to avoid the pressure roller 17 from obstructing the test. The lifting beam 3 of the tester drives the tension sensor 4 and the fixing clip 6 to pull the test film 5 upward to perform the adhesion test.

[0032] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixed packaging stretch film tester, comprising a gantry frame (2) fixed on a test table (1), a lifting beam (3) movably connected to the gantry frame (2), a tension sensor (4) installed below the lifting beam (3), a fixing clamp (6) installed below the tension sensor (4) for fixing the upper end of the film to be tested (5), an L-shaped frame (7) fixed on the test table (1) via a connecting seat, an inclined plate (9) for fixing the bottom film (8) placed at an angle inside the L-shaped frame (7), a knob bolt (10) movably inserted into one side of the L-shaped frame (7), and a fixing tube (11) fixed to one side of the inclined plate (9) and threadedly connected to the knob bolt (10), characterized in that: The upper and lower ends of the bottom membrane (8) pass over the upper and lower edges of the inclined plate (9) respectively and are clamped between the inclined plate (9) and the L-shaped frame (7). The membrane to be tested (5) is directly pasted on the surface of the bottom membrane (8). The L-shaped frame (7) is movably hinged to two inclined rods (12) located in front of and behind the side of the inclined plate (9) away from the L-shaped frame (7) via a hinge seat. The upper end of the inclined rod (12) is fixed with a support rod (13) supporting one side of the L-shaped frame (7). Sliding sleeves (14) are slidably sleeved on the surfaces of the two inclined rods (12). Fixed sleeves (15) are fixed on the two sliding sleeves (14). Movable rods (16) are movably inserted into the two fixed sleeves (15). The lower ends of the two movable rods (16) are rotatably connected to the two ends of the pressure roller (17). The pressure roller (17) can press on the surface of the membrane (5) to be tested. The surface of the movable rod (16) is fitted with a compression spring (18) located between the fixed sleeve (15) and the pressure roller (17), and the upper ends of the two movable rods (16) are fixedly connected to the handle (19).

2. The fixed packaging stretch film tester according to claim 1, characterized in that: The inclined rod (12) and the inclined plate (9) are parallel to each other.

3. The fixed packaging stretch film tester according to claim 1, characterized in that: The two inclined rods (12) are symmetrically arranged with the inclined plate (9) as the center.

4. The fixed packaging stretch film tester according to claim 1, characterized in that: The support rod (13) is L-shaped and is an integral structure with the diagonal rod (12). The vertical part of the support rod (13) can be supported on the side of the L-shaped frame (7).

5. The fixed packaging stretch film tester according to claim 1, characterized in that: The pressure roller (17) and the handle (19) are parallel to each other, and the pressure roller (17) is perpendicular to the inclined bar (12).

6. The fixed packaging stretch film tester according to claim 1, characterized in that: The compression springs (18) on the surfaces of the two movable rods (16) are identical in shape and specifications.

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