A heat seal tester

Abstract

The application discloses a heat sealing tester, and relates to the technical field of packaging bag production, which comprises a tester main body, a lower heat sealing cutter fixedly connected to the top of the tester main body, lifting rods fixedly connected to the two sides of the top of the tester main body, an upper heat sealing cutter piece fixedly connected to the top end of the lifting rod, a sliding seat fixedly connected to the top of the upper heat sealing cutter piece, and the upper heat sealing cutter piece corresponding to the lower heat sealing cutter. After the fixing assembly fixes the material, the upper heat sealing cutter piece is pressed downward to drive the soothing piece to move, so that the soothing piece and the internal components of the pre-pressing piece are in contact with the thermoplastic material, the material is smoothed along with the downward movement of the upper heat sealing cutter piece, the wrinkles and warping of the material are eliminated, the possibility of the material being folded and overlapped during heat sealing is reduced, the heat sealing quality is improved, and the accuracy of the thermoplastic material test is improved.

Description

Technical Field

[0001] This application relates to the field of packaging bag production technology, and in particular to a heat-sealing tester. Background Technology

[0002] Packaging bags are indispensable practical tools in daily life and industrial production. They provide sealed protection for various items such as food, clothing, and electronic components, isolating them from external dust, moisture, and pollution. They also facilitate storage and transportation, and can convey product information and enhance brand recognition through printed patterns and text. From snack bags in supermarkets to express delivery bags in logistics, from household food storage bags to heavy-duty packaging bags used in industry, their shapes and materials vary depending on their uses, but their core functions always revolve around "protection, storage, and information transmission."

[0003] In the packaging bag production process, heat-sealing testing of thermoplastic materials is a crucial step in ensuring packaging quality, and the heat-sealing testing machine is the core equipment for achieving this goal. The heat-sealing performance of thermoplastic materials directly determines key indicators such as the sealing performance and impact resistance of packaging bags. Improper heat-sealing parameters may lead to problems such as incomplete sealing and leakage, or over-sealing causing material embrittlement and cracking, thereby affecting the product's shelf life and transportation safety. The heat-sealing testing machine can simulate the heat-sealing environment in actual production, accurately test the heat-sealing effect of materials under different combinations of temperature, pressure, and time, quickly find the optimal heat-sealing process parameters, avoid large-scale production waste due to parameter errors, and ensure that the produced packaging bags meet industry quality standards, laying a reliable foundation for subsequent testing of packaging strength, sealing performance, and other aspects.

[0004] When conducting heat-sealing tests on thermoplastic materials, the material needs to be manually placed on the heat-sealing blade. The material is then heated using two heat-sealing blades to melt and bond it for the heat-sealing test. However, before heat-sealing, the material often develops wrinkles due to improper handling or lack of adhesion between materials. If these wrinkles are not addressed, the heat-sealing blade will not be able to accurately seal the wrinkled areas, leading to inaccurate test results and making it impossible to determine the optimal process conditions. This could potentially affect the sealing reliability of the packaging bags in subsequent production. Utility Model Content

[0005] The purpose of this application is to address the problem in the prior art where, before heat sealing, materials often become wrinkled due to improper handling or lack of adhesion between materials. If this wrinkling is not addressed, the heat sealing knife will not accurately seal the wrinkled parts, resulting in inaccurate test results and an inability to precisely determine the optimal process conditions. This could potentially affect the sealing reliability of the packaging bags in subsequent production. This application provides a heat sealing tester.

[0006] To achieve the above objectives, this application specifically adopts the following technical solution: A heat sealing tester includes a tester body. A lower heat sealing blade is fixedly connected to the top of the tester body, and lifting rods are fixedly connected to both sides of the top of the tester body. An upper heat sealing blade is fixedly connected to the top of the lifting rod, and a sliding seat is fixedly connected to the top of the upper heat sealing blade. The upper heat sealing blade corresponds to the lower heat sealing blade. A fixing component is fixedly connected to one side of the top of the tester body, and a material guiding ramp is fixedly connected to the other side of the top of the tester body. A pressing component is slidably installed on the sliding seat, and a pre-pressing component is installed on the pressing component. The pressing component and the pre-pressing component are located above the material guiding ramp.

[0007] By adopting the above technical solution, after the fixing component fixes the material, the pressing component can be moved by the downward pressure of the upper heat sealing blade, so that the internal components of the pressing component and the pre-pressing component come into contact with the thermoplastic material. With the downward movement of the upper heat sealing blade, the material is smoothed, eliminating wrinkles and warping, reducing the possibility of material wrinkling and overlapping during heat sealing, improving heat sealing quality, and thus improving the accuracy of thermoplastic material testing.

[0008] Furthermore, the upper heat sealing blade includes a connecting plate fixedly connected to the top of the lifting rod, and an upper heat sealing blade is fixedly connected to the bottom of the connecting plate. A heating tube is provided inside the upper heat sealing blade, and the upper heat sealing blade corresponds to the lower heat sealing blade.

[0009] By adopting the above technical solution, the upper heat sealing knife is heated by the heating tube, and the contact part is melted by the heating of the upper heat sealing knife, so that the upper and lower materials are partially melted.

[0010] Furthermore, both the upper and lower heat-sealing blades are provided with a heat-conducting layer on their surfaces.

[0011] By adopting the above technical solution, the heat-conducting layer is heat-conducting paper, and the heat-conducting paper is bonded to the outer surfaces of the upper heat-sealing knife and the lower heat-sealing knife respectively by adhesive tape.

[0012] Furthermore, the fixing assembly includes a lower clamping plate fixedly connected to one side of the top of the testing instrument body, a servo motor fixedly connected inside the testing instrument body, a lead screw fixedly connected to the output end of the servo motor, an upper clamping plate threaded onto the lead screw, a guide rod fixedly connected to one side of the top of the testing instrument body, the guide rod being connected through one end to the upper clamping plate, and a limit plate fixedly connected to the top ends of both the lead screw and the guide rod, with the lower clamping plate and the upper clamping plate corresponding to each other.

[0013] By adopting the above technical solution, one end of the material can be clamped and fixed by the upper and lower clamps, thus achieving the restriction and fixation of the material.

[0014] Furthermore, a groove is provided on the top of the lower clamping plate, and an anti-slip layer is coated on the inner side of the groove.

[0015] By adopting the above technical solution, the inner dimensions of the groove in the lower clamping plate are adapted to the bottom end of the upper clamping plate. By embedding the upper clamping plate into the groove, the material can be fixed.

[0016] Furthermore, a sliding groove is provided on the sliding seat, and a telescopic guide rod is fixedly connected to one side of the inner side of the sliding groove. A spring is sleeved on the outer side of the telescopic guide rod.

[0017] By adopting the above technical solution, the pressing component can be reset under the elastic action of the spring.

[0018] Furthermore, the smoothing component includes a slider slidably connected inside the groove, a movable plate fixedly connected to the bottom of the slider, and one side of the slider fixedly connected to a telescopic guide rod. Spring telescopic rods are fixedly connected to both sides of the bottom of the movable plate, and a smoothing rod is fixedly connected to the bottom end of the spring telescopic rod.

[0019] By adopting the above technical solution, the material can be flattened by using a smoothing rod.

[0020] Furthermore, the pre-compression component includes a swing rod symmetrically rotatably connected to one side of the smoothing rod, a pre-compression roller rotatably connected between the two swing rods, a tension spring fixedly connected to one side of the swing rod, and the end of the tension spring away from the swing rod fixedly connected to the smoothing rod.

[0021] By adopting the above technical solution, the material can be initially smoothed by the pre-compression roller.

[0022] In summary, this application includes at least one of the following beneficial effects; 1. In this application, when performing heat sealing tests on thermoplastic materials, one end of the double-layer thermoplastic material can be placed on a fixing component. Then, under the operation of the fixing component, its internal components move, thereby clamping and fixing one end of the thermoplastic material. This restricts and fixes it, preventing positional displacement caused by material shrinkage during heating, improving heat sealing quality, and thus improving the accuracy of thermoplastic material testing.

[0023] 2. In this application, after the fixing component fixes the material, the pressing component can be moved by the downward pressure of the upper heat sealing blade, so that the internal components of the pressing component and the pre-pressing component come into contact with the thermoplastic material. With the downward movement of the upper heat sealing blade, the material is smoothed, eliminating wrinkles and warping of the material, reducing the possibility of material wrinkling and overlapping during heat sealing, improving the heat sealing quality, and thus improving the accuracy of thermoplastic material testing. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the structure of this application; Figure 2 This is a partial structural diagram of this application; Figure 3 This is a schematic diagram of the structure of the upper heat-sealing blade in this application; Figure 4 This is a schematic diagram of the structure of the fixing component in this application; Figure 5 This is a schematic diagram of the sliding seat and the pressing component in this application; Figure 6 This is a structural schematic diagram of the pre-compression component in this application.

[0025] Explanation of reference numerals in the attached figures: 1. Main body of the testing instrument; 2. Lower heat sealing knife; 3. Lifting rod; 4. Upper heat sealing knife; 5. Fixing assembly; 6. Sliding seat; 7. Pressing component; 8. Pre-pressing component; 9. Guide ramp; 41. Connecting plate; 42. Upper heat sealing knife; 43. Heating tube; 51. Lower clamping plate; 52. Servo motor; 53. Lead screw; 54. Upper clamping plate; 55. Limiting plate; 56. Guide rod; 61. Slide groove; 62. Telescopic guide rod; 63. Spring; 71. Moving plate; 72. Slider; 73. Spring telescopic rod; 74. Smoothing rod; 81. Swinging rod; 82. Pre-pressing roller; 83. Tension spring. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 —6 provides further detailed description of this application.

[0027] This application discloses a heat sealing tester.

[0028] Reference Figures 1 to 3A heat sealing tester includes a tester body 1. A lower heat sealing blade 2 is fixedly connected to the top of the tester body 1, and lifting rods 3 are fixedly connected to both sides of the top of the tester body 1. An upper heat sealing blade 4 is fixedly connected to the top of the lifting rods 3, and a sliding seat 6 is fixedly connected to the top of the upper heat sealing blade 4. The upper heat sealing blade 4 corresponds to the lower heat sealing blade 2. A fixing component 5 is fixedly connected to one side of the top of the tester body 1, and a material guiding slope 9 is fixedly connected to the other side of the top of the tester body 1. A pressing component 7 is slidably installed on the sliding seat 6, and a pre-pressing component 8 is installed on the pressing component 7. The pressing component 7 and the pre-pressing component 8 are located above the material guiding slope 9. The upper heat sealing blade 4 includes a fixed... A connecting plate 41 is fixedly connected to the top of the lifting rod 3. An upper heat sealing knife 42 is fixedly connected to the bottom of the connecting plate 41. A heating tube 43 is provided inside the upper heat sealing knife 42. The upper heat sealing knife 42 and the lower heat sealing knife 2 correspond to each other. A heat-conducting layer is provided on the surface of both the upper heat sealing knife 42 and the lower heat sealing knife 2. Here, the heat-conducting layer is heat-conducting paper, and the heat-conducting paper is glued to the outer surface of the upper heat sealing knife 42 and the lower heat sealing knife 2 respectively by tape. The inclination height of the material guiding slope 9 and the placement height of the fixing component 5 are both lower than the height of the lower heat sealing knife 2. The contact end height of the pre-pressing component 8 is lower than the contact end height of the pressing component 7, and the contact end height of the pressing component 7 is lower than the contact end height of the upper heat sealing knife 42.

[0029] When testing thermoplastic materials, one end of the double-layer material can be placed on the fixing component 5. Then, under the operation of the fixing component 5, its internal components will compress and fix one end of the double-layer material, thus restricting and fixing the double-layer material. By operating the main body 1 of the testing instrument, the heating tube 43 can be adjusted so that the heating tube 43 heats the upper heat sealing knife 42, thereby heating the upper heat sealing knife 42 to the set temperature. After heating, the lifting rod 3 drives the connecting plate 41 to move downward, thereby driving the upper heat sealing knife 42 towards the lower heat sealing knife 2. When the connecting plate 41 moves downward, it can drive the sliding seat 6 to move downward, which in turn drives the pressing component 7 and the pre-pressing component 8 to move, so that the pre-pressing component 8 and the pressing component 7 press down and smooth the material on the guide slope 9, and then cooperate with the fixing component 5 to flatten the material. Then, the material is squeezed by the upper heat sealing knife 42 and the lower heat sealing knife 2, and the contact part is melted by the heating of the upper heat sealing knife 42, so that the upper and lower materials partially melt and stick together, thereby achieving a seal. This simulates the actual packaging sealing process. Through repeated experiments, the optimal heat sealing parameters are obtained.

[0030] Reference Figure 4The fixing component 5 includes a lower clamping plate 51 fixedly connected to one side of the top of the main body 1 of the testing instrument. A servo motor 52 is fixedly connected inside the main body 1 of the testing instrument. A lead screw 53 is fixedly connected to the output end of the servo motor 52. An upper clamping plate 54 is threaded onto the lead screw 53. A guide rod 56 is fixedly connected to one side of the top of the main body 1 of the testing instrument. One end of the guide rod 56 is connected through the upper clamping plate 54. Limiting plates 55 are fixedly connected to the top ends of both the lead screw 53 and the guide rod 56. The lower clamping plate 51 and the upper clamping plate 54 correspond to each other. A groove is provided on the top of the lower clamping plate 51. An anti-slip layer is coated on the inner side of the groove.

[0031] One end of the double-layer material is placed on the lower clamping plate 51. Under the operation of the servo motor 52, the lead screw 53 is driven to rotate. The rotating lead screw 53 drives the upper clamping plate 54, causing the upper clamping plate 54 to move towards the lower clamping plate 51. The upper clamping plate 54 and the lower clamping plate 51 can clamp and fix one end of the material, thereby restricting and fixing the material and preventing positional displacement caused by material shrinkage during heating, thus improving the heat sealing quality. The limiting plate 55 can limit the upper clamping plate 54 to prevent it from falling off the lead screw 53. The inner dimension of the groove in the lower clamping plate 51 is adapted to the bottom end of the upper clamping plate 54. By embedding the upper clamping plate 54 into the groove, the material can be fixed. The anti-slip layer is made of rubber, which can increase the friction between the material and the lower clamping plate 51, thereby improving the fixing strength.

[0032] Reference Figure 5 and Figure 6 The sliding seat 6 has a groove 61. A telescopic guide rod 62 is fixedly connected to one side of the inner side of the groove 61. A spring 63 is sleeved on the outer side of the telescopic guide rod 62. The pressing component 7 includes a slider 72 that is slidably connected inside the groove 61. A moving plate 71 is fixedly connected to the bottom of the slider 72. One side of the slider 72 is fixedly connected to the telescopic guide rod 62. Spring telescopic rods 73 are fixedly connected to both sides of the bottom of the moving plate 71. A smoothing rod 74 is fixedly connected to the bottom end of the spring telescopic rod 73. The pre-pressing component 8 includes a swing rod 81 that is symmetrically rotatably connected to one side of the smoothing rod 74. A pre-pressing roller 82 is rotatably connected between the two swing rods 81. A tension spring 83 is fixedly connected to one side of the swing rod 81. The end of the tension spring 83 away from the swing rod 81 is fixedly connected to the smoothing rod 74.

[0033] When the connecting plate 41 moves downward, it drives the sliding seat 6 to move, causing the sliding seat 6 to drive the pressing component 7 and the pre-pressing component 8 to move downward. This allows the pre-pressing roller 82 to contact the material first. As the connecting plate 41 moves downward, the pre-pressing roller 82 moves along the inclined direction of the guide slope 9 and initially smooths the material. Then, the smoothing rod 74 contacts the material. As the connecting plate 41 moves downward, the smoothing rod 74 is subjected to a reaction force, causing the slider 72 to slide inside the groove 61. This, in turn, drives the moving plate 71 to move, causing the smoothing rod 74 to move along the inclined direction of the guide slope 9. This, in conjunction with the fixing component 5, further smooths the material. During this process, the elasticity of the spring telescopic rod 73 buffers the contact force of the smoothing rod 74, preventing the material from being torn due to excessive contact force.

[0034] When the connecting plate 41 is raised, the elastic action of the tension spring 83 can pull the swing rod 81, thereby driving the pre-pressure roller 82 to reset. The elastic action of the spring 63 can push the slider 72 to the top, thereby resetting the smoothing rod 74.

[0035] Working principle: When testing thermoplastic materials, one end of the double-layer material is first placed on the lower clamping plate 51. Then, under the operation of the servo motor 52, the lead screw 53 is driven to rotate. The rotating lead screw 53 drives the upper clamping plate 54, causing the upper clamping plate 54 to move towards the lower clamping plate 51. The upper clamping plate 54 and the lower clamping plate 51 can clamp and fix one end of the material, thus achieving material restriction and fixation. By operating the main body 1 of the testing instrument, the heating tube 43 can be adjusted to heat the upper heat sealing knife 42, thereby heating the upper heat sealing knife 42 to the set temperature. After heating, the lifting rod... 3. The connecting plate 41 is moved downward, which in turn moves the upper heat sealing knife 42 toward the lower heat sealing knife 2. When the connecting plate 41 moves downward, it can move the sliding seat 6 downward, which in turn moves the pressing component 7 and the pre-pressing component 8. This allows the pre-pressing component 8 and the pressing component 7 to press down and smooth the material on the guide slope 9. Then, in conjunction with the fixing component 5, the material is flattened. After that, the material is squeezed by the upper heat sealing knife 42 and the lower heat sealing knife 2. The upper heat sealing knife 42 heats and melts the contact part, causing the upper and lower materials to partially melt and stick together, thereby achieving a seal. This simulates the actual packaging sealing process. Through repeated experiments, the optimal heat sealing parameters are obtained.

Claims

1. A heat sealing tester, comprising a tester body (1), characterized in that: The top of the main body (1) of the test instrument is fixedly connected to a lower heat sealing knife (2), and both sides of the top of the main body (1) of the test instrument are fixedly connected to lifting rods (3). The top of the lifting rods (3) is fixedly connected to an upper heat sealing knife (4). The top of the upper heat sealing knife (4) is fixedly connected to a sliding seat (6), and the upper heat sealing knife (4) corresponds to the lower heat sealing knife (2). A fixing component (5) is fixedly connected to one side of the top of the main body (1) of the test instrument, and a guide slope (9) is fixedly connected to the other side of the top of the main body (1). A pressing component (7) is slidably installed on the sliding seat (6), and a pre-pressing component (8) is installed on the pressing component (7). The pressing component (7) and the pre-pressing component (8) are located above the guide slope (9).

2. The heat sealing tester according to claim 1, characterized in that: The upper heat sealing knife (4) includes a connecting plate (41) fixedly connected to the top of the lifting rod (3). The bottom of the connecting plate (41) is fixedly connected to the upper heat sealing knife (42). The upper heat sealing knife (42) is provided with a heating tube (43) inside. The upper heat sealing knife (42) corresponds to the lower heat sealing knife (2).

3. A heat-sealing tester according to claim 2, characterized in that: Both the upper heat sealing blade (42) and the lower heat sealing blade (2) have a heat-conducting layer on their surfaces.

4. A heat sealing tester according to claim 1, characterized in that: The fixing component (5) includes a lower clamping plate (51) fixedly connected to one side of the top of the test instrument body (1). A servo motor (52) is fixedly connected inside the test instrument body (1). A lead screw (53) is fixedly connected to the output end of the servo motor (52). An upper clamping plate (54) is threaded onto the lead screw (53). A guide rod (56) is fixedly connected to one side of the top of the test instrument body (1). One end of the guide rod (56) is connected through the upper clamping plate (54). Limiting plates (55) are fixedly connected to the top ends of both the lead screw (53) and the guide rod (56). The lower clamping plate (51) and the upper clamping plate (54) correspond to each other.

5. A heat-sealing tester according to claim 4, characterized in that: The top of the lower clamping plate (51) is provided with a groove, and the inner side of the groove is coated with an anti-slip layer.

6. A heat sealing tester according to claim 1, characterized in that: The sliding seat (6) has a groove (61), and a telescopic guide rod (62) is fixedly connected to one side of the inner side of the groove (61). A spring (63) is sleeved on the outer side of the telescopic guide rod (62).

7. A heat-sealing tester according to claim 6, characterized in that: The smoothing component (7) includes a slider (72) slidably connected inside the slide groove (61). A movable plate (71) is fixedly connected to the bottom of the slider (72), and one side of the slider (72) is fixedly connected to the telescopic guide rod (62). Spring telescopic rods (73) are fixedly connected to both sides of the bottom of the movable plate (71), and a smoothing rod (74) is fixedly connected to the bottom end of the spring telescopic rod (73).

8. A heat sealing tester according to claim 7, characterized in that: The pre-compression component (8) includes a swing rod (81) symmetrically rotatably connected to one side of the smoothing rod (74), a pre-compression roller (82) rotatably connected between the two swing rods (81), and a tension spring (83) fixedly connected to one side of the swing rod (81). The end of the tension spring (83) away from the swing rod (81) is fixedly connected to the smoothing rod (74).

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