A tension detection mechanism for degradable plastic bag production

Abstract

This utility model discloses a tension testing mechanism for the production of biodegradable plastic bags. It relates to the field of biodegradable plastic bag production equipment and includes: a testing machine housing; a base at the bottom of the housing; a side-mounted cylinder inside the housing; a shifting plate outside the cylinder; an upper clamp at the bottom of the shifting plate; a lower clamp at the center of the top of the base; a connecting rod between the base and the upper clamp; side clamps on both sides of the connecting rod; and an airbag inside the side clamp. This tension testing mechanism for biodegradable plastic bag production, by inflating the airbag and wrapping it around the side clamps, effectively prevents direct contact between the side clamps and the plastic bag when the upper and lower clamps clamp the plastic bag, avoiding physical damage such as scratching or squeezing during testing and ensuring the integrity of the tested sample.

Description

Technical Field

[0001] This utility model relates to the technical field of biodegradable plastic bag production equipment, specifically a tension detection mechanism for the production of biodegradable plastic bags. Background Technology

[0002] Plastic bag tension testing equipment is a key device in plastic processing and production used to test the mechanical properties of plastic bags, such as their tensile strength. It tests the tensile and tear resistance of plastic bags by applying varying degrees of tension, ensuring product quality. However, in practical applications, common plastic bag tension testing equipment often suffers from physical damage to the plastic bags during the testing process. For example, when the clamps tighten or the testing components move, the hard contact often scrapes or squeezes the plastic bag, affecting the accuracy of the test results and damaging the sample.

[0003] Announcement No. CN218349966U describes a tension testing mechanism for the production of biodegradable plastic bags. This mechanism employs a tension extension testing method, utilizing a drive motor, an extension shaft, and a actuator to test the tension from within the plastic bag. This internal testing approach aims to avoid direct damage to the plastic bag surface caused by traditional external clamps. Specifically, the drive motor rotates the extension shaft, and the actuator on the extension shaft acts on the inside of the plastic bag to achieve tension detection, thus changing the way external force is applied to some extent.

[0004] Although the internal detection structure of the above technology applies force from the inside during operation, it does not effectively protect the contact area between the plastic bag and the detection component. During the contact between the detection component and the inside of the plastic bag, damage to the inside of the plastic bag may still occur due to hard friction, excessive local pressure, etc., affecting the detection results. Furthermore, it cannot adapt to the diverse protection needs of biodegradable plastic bags of different thicknesses and materials.

[0005] Therefore, in order to address the shortcomings of the existing system, a tension testing mechanism for the production of biodegradable plastic bags was proposed. Utility Model Content

[0006] The purpose of this invention is to provide a tension testing mechanism for the production of biodegradable plastic bags, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a tension testing mechanism for the production of biodegradable plastic bags, comprising: a testing machine housing, a base at the bottom of the testing machine housing, a side-mounted cylinder on the inner side of the testing machine housing, a shifting plate on the outer side of the side-mounted cylinder, an upper clamp at the bottom of the shifting plate, and a lower clamp at the middle of the top of the base;

[0008] A connecting rod is provided at the middle of the base and the upper clamp, and side clamps are provided on both sides of the connecting rod. An airbag is provided on the inner side of the side clamp.

[0009] The lower part of the outer shell of the testing machine is provided with two protective shells. The inner part of the protective shell is provided with an internal piston cylinder. The inner side of the internal piston cylinder is vertically provided with a push plate. An air inlet pipe is provided on one side of the outer shell. The top of the push plate inside the protective shell at the upper front of the testing machine outer shell is provided with an upper push rod. The outside of the upper push rod is provided with a pressure plate. The bottom of the pressure plate is provided with a lower push rod. An air guide pipe is provided on the inner side of the protective shell near the outer shell of the testing machine.

[0010] Furthermore, a one-way valve is provided between the air duct and the airbag.

[0011] Furthermore, a one-way valve is provided at the connection between the air intake pipe and the built-in piston cylinder inside the protective shell.

[0012] Furthermore, the upper push rod and the push plate are fixedly connected, and the upper push rod can move up and down outside the side cylinder along with the shift plate.

[0013] Furthermore, the pressure plate is fixedly connected to the upper push rod and the lower push rod.

[0014] Furthermore, the upper push rod can drive the pressure plate to move up and down, and when the pressure plate moves, it can drive the lower push rod to move up and down.

[0015] Furthermore, the inflated length of the airbag is equal to the length of the lateral clamp.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model uses an inflatable airbag to wrap around the outside of the side clamp. When the upper and lower clamps clamp the plastic bag, it can effectively prevent the side clamp from directly contacting the plastic bag, avoiding physical damage such as scratching and squeezing to the biodegradable plastic bag during the testing process, ensuring the integrity of the test sample, and making the test results more accurately reflect the tensile properties of the plastic bag itself.

[0018] 2. This utility model uses the linkage of components such as the shift plate, the upper push rod, and the push plate, and utilizes the power of the side-mounted cylinder to realize the process of introducing gas into the airbag. It eliminates the need for an additional power source to drive the airbag to inflate, simplifies the mechanism structure, improves the coordination efficiency of each component, and reduces equipment costs and maintenance difficulty. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the biodegradable plastic bag tension detection mechanism of this utility model;

[0020] Figure 2 for Figure 1 Enlarged view of part A of the tension detection mechanism of this utility model;

[0021] Figure 3 This is a side view of the testing mechanism of this utility model;

[0022] Figure 4 This is a top view of the testing mechanism of this utility model (showing the top and side layouts).

[0023] In the diagram: 1. Detector housing; 2. Shifting plate; 3. Internal piston cylinder; 4. Lower push rod; 5. Push plate; 6. Lower clamp; 7. Base; 8. Air inlet pipe; 9. Protective shell; 10. Pressure plate; 11. Side-mounted cylinder; 12. Upper push rod; 13. Upper clamp; 14. Air guide pipe; 15. Airbag; 16. Connecting rod; 17. Side clamp. Detailed Implementation

[0024] 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.

[0025] like Figures 1-4 As shown, a tension testing mechanism for the production of biodegradable plastic bags includes: a testing machine housing 1, a base 7 at the bottom of the testing machine housing 1, a side-mounted cylinder 11 on the inner side of the testing machine housing 1, a shifting plate 2 on the outer side of the side-mounted cylinder 11, an upper clamp 13 at the bottom of the shifting plate 2, and a lower clamp 6 at the middle of the top of the base 7.

[0026] A connecting rod 16 is provided at the middle of the base 7 and the upper clamp 13. Side clamps 17 are provided on both sides of the outside of the connecting rod 16. An airbag 15 is provided on the inner side of the side clamp 17.

[0027] Two protective shells 9 are provided at the lower end of the outer shell 1 of the testing machine. Inside the protective shell 9, there is an internal piston cylinder 3. A push plate 5 is vertically arranged inside the internal piston cylinder 3. An air inlet pipe 8 is provided on one side of the outer shell 9. An upper push rod 12 is provided on the top of the push plate 5 inside the protective shell 9 at the upper front of the testing machine shell 1. A pressure plate 10 is provided outside the upper push rod 12. A lower push rod 4 is provided at the bottom of the pressure plate 10. An air guide pipe 14 is provided on the inner side of the protective shell 9 near the inner side of the testing machine shell 1.

[0028] Example 1: Based on the original mechanism, the connection structure between the side-mounted cylinder 11 and the shift plate 2 is optimized. The piston rod of the side-mounted cylinder 11 and the shift plate 2 are connected by a flexible coupling with a buffer function. When the side-mounted cylinder 11 drives the shift plate 2 to move, the flexible coupling can absorb the vibration and impact force during the movement, making the shift plate 2 drive the upper push rod 12 to move more smoothly. At the joint between the push plate 5 and the built-in piston cylinder 3, a piston ring made of wear-resistant sealing material is used to improve gas sealing and reduce gas leakage. At the same time, a flow regulating valve is added to the air guide pipe 14, which can accurately control the gas flow rate introduced into the airbag 15 according to the thickness and material of the plastic bag, so that the inflation degree of the airbag 15 can adapt to the protection requirements of different sizes of plastic bags. In this way, the optimized mechanism can operate more stably and accurately when detecting different types of biodegradable plastic bags, improving the reliability and adaptability of tension detection. By optimizing the connection structure and sealing and regulating components, the synergistic effect of each structure is strengthened, ensuring a smooth detection process.

[0029] Example 2: The original airbag 15 is replaced with an elastic silicone pad structure. The elastic silicone pad is arc-shaped and pre-fixed to the inside of the side clamp 17. When protection is required, a micro air pump added to the inside of the outer shell 1 of the testing machine inflates the cavity between the elastic silicone pad and the side clamp 17 through the air guide tube 14, causing the elastic silicone pad to bulge and adhere to the plastic bag. Compared with the airbag 15, the elastic silicone pad itself has better elasticity and wear resistance, and can be reused more times. At the same time, by changing the driving method of the protective component, the inflation volume is precisely controlled by the micro air pump. It can flexibly adjust the degree of inflation of the silicone pad for different tension testing scenarios, such as high tension and low tension testing, to better adapt to the diverse testing needs of biodegradable plastic bags. Moreover, the silicone pad is fixed on the side clamp 17, making installation and replacement more convenient and reducing maintenance costs. By replacing the protective component and the driving method, the protective effect and usage flexibility of the mechanism on plastic bags are optimized.

[0030] Working principle: When using the tension testing mechanism for biodegradable plastic bag production, the biodegradable plastic bag to be tested is first placed between the upper clamp 13 and the lower clamp 6. The side-mounted cylinder 11 inside the outer shell 1 of the testing machine drives the shift plate 2 to move up and down. During the movement of the shift plate 2, the upper push rod 12 fixedly connected to it moves synchronously. The upper push rod 12 drives the push plate 5 to move up and down inside the built-in piston cylinder 3. Since a one-way valve is provided at the connection between the air inlet pipe 8 and the built-in piston cylinder 3 inside the protective shell 9, outside air can enter the built-in piston cylinder 3 through the air inlet pipe 8. When the pusher 5 moves, the gas in the built-in piston cylinder 3 is introduced into the airbag 15 through the air guide pipe 14 and the one-way valve between the air guide pipe 14 and the airbag 15. After the airbag 15 inflates, it is located outside the base 7. Then, the plastic bag is clamped by the upper clamp 13 and the lower clamp 6. The side clamp 17 cooperates. The airbag 15 can avoid damaging the plastic bag inside the base 7. At the same time, the side cylinder 11 continuously applies force to simulate the tension situation in production and use, thereby testing the tension performance of the plastic bag and completing the testing process.

[0031] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A tension testing mechanism for the production of biodegradable plastic bags, comprising: The outer casing (1) of the testing machine is characterized in that a base (7) is provided at the bottom of the outer casing (1), a side-mounted cylinder (11) is provided on the inner side of the outer casing (1), a shifting plate (2) is provided on the outer side of the side-mounted cylinder (11), an upper clamp (13) is provided at the bottom of the shifting plate (2), and a lower clamp (6) is provided at the middle of the top of the base (7). A connecting rod (16) is provided at the middle of the base (7) and the upper clamp (13). Side clamps (17) are provided on both sides of the connecting rod (16). An airbag (15) is provided on the inner side of the side clamp (17). Two protective shells (9) are provided at the lower end of the outer shell (1) of the testing machine. An internal piston cylinder (3) is provided inside the protective shell (9). A push plate (5) is vertically arranged on the inner side of the internal piston cylinder (3). An air inlet pipe (8) is provided on one side of the outer shell (9). An upper push rod (12) is provided at the top of the push plate (5) inside the upper protective shell (9) on the front of the testing machine (1). A pressure plate (10) is provided outside the upper push rod (12). A lower push rod (4) is provided at the bottom of the pressure plate (10). An air guide pipe (14) is provided on the inner side of the protective shell (9) near the outer shell (1) of the testing machine.

2. The tension detection mechanism for the production of biodegradable plastic bags according to claim 1, characterized in that, A one-way valve is provided between the air duct (14) and the airbag (15).

3. The tension detection mechanism for the production of biodegradable plastic bags according to claim 1, characterized in that, A one-way valve is provided at the connection between the air intake pipe (8) and the built-in piston cylinder (3) inside the protective shell (9).

4. The tension detection mechanism for the production of biodegradable plastic bags according to claim 1, characterized in that, The upper push rod (12) and the push plate (5) are fixedly connected. The upper push rod (12) can move up and down outside the side cylinder (11) along with the shift plate (2).

5. The tension detection mechanism for the production of biodegradable plastic bags according to claim 1, characterized in that, The pressure plate (10) is fixedly connected to the upper push rod (12) and the lower push rod (4).

6. The tension detection mechanism for the production of biodegradable plastic bags according to claim 1, characterized in that, The upper push rod (12) can drive the pressure plate (10) to move up and down, and when the pressure plate (10) moves, it can drive the lower push rod (4) to move up and down.

7. The tension detection mechanism for the production of biodegradable plastic bags according to claim 1, characterized in that, The inflated length of the airbag (15) is equal to the length of the lateral clamp (17).

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