A paper dynamic friction test platform

Abstract

The utility model provides a kind of paper material dynamic friction test platform, it includes pedestal, setting in the first side of pedestal fixed clamp, setting in the second side of pedestal movable clamp and the tensioning mechanism being connected with movable clamp, pedestal has a test base surface, fixed clamp has the first chuck for applying pressure to test base surface, tensioning mechanism includes fixed block, movable block and spring, fixed block is fixedly connected with pedestal, movable block is elastically connected with fixed block by spring, movable block has a clamping surface parallel with test base surface, movable clamp is connected with movable block and has the second chuck for applying pressure to clamping surface, the arrangement direction of fixed clamp and movable clamp is parallel with the axial direction of spring.The utility model sets fixed clamp and movable clamp to fix the both sides of paper material, movable clamp can be moved to the direction away from fixed clamp by movable block and spring, so as to tension paper material, the paper material above test base surface always keeps flat during testing.

Description

Technical Field

[0001] This utility model relates to the field of friction coefficient detection technology, specifically to a paper dynamic friction testing platform. Background Technology

[0002] In the packaging industry, the coefficient of friction of paper has a critical impact on the processing and use of paper. Taking cigarette packaging as an example, the carton and box usually have a surface coating. A low coefficient of friction of the surface coating will cause the material to slip during the packaging and rolling process. A high coefficient of friction of the surface coating will reduce the scratch resistance of the coating and also affect the smoothness of the surface. Therefore, it is necessary to use appropriate equipment to measure the coefficient of friction of the carton and box.

[0003] In the process of determining the coefficient of friction of cigarette pack materials, it is necessary to cause the surfaces of the two test objects to rub against each other according to the actual usage conditions. For example, patent application CN202323582181.7 discloses a sampling and friction coefficient determination device for cigarette inner lining paper. This device has a friction coefficient testing platform, a slider, and a driving component. In use, the first type of paper to be tested is laid flat and fixed on the upper surface of the friction coefficient testing platform, and the second type of paper to be tested is fixed and wrapped around the lower side of the slider. The slider is placed on the friction coefficient testing platform, and the slider is slid by the driving component, thus realizing the mutual friction between the two types of paper. In existing methods, the paper on the testing platform is usually fixed by clamps or pressure blocks on one side, or by adhesive tape or glue. When using clamps or pressure blocks for fixation, it is suitable for relatively hard paper. When dealing with relatively soft paper, it is difficult for the paper to remain flat on the testing platform, and errors are easily generated during sliding friction. When using adhesive tape or glue for fixation, the problem of needing to flatten the paper is also faced, which is inconvenient to operate. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a paper dynamic friction testing platform that enables the paper to remain flat during testing, thereby reducing errors in the testing process.

[0005] To solve the above problems, the present invention adopts the following technical solution: A paper dynamic friction testing platform includes a base, a fixed clamp disposed on a first side of the base, a movable clamp disposed on a second side of the base, and a tensioning mechanism connected to the movable clamp. The base has a test base surface, the fixed clamp has a first chuck for applying pressure to the test base surface, and the tensioning mechanism includes a fixed block, a movable block, and a spring. The fixed block is fixedly connected to the base, the movable block is elastically connected to the fixed block through the spring, the movable block has a clamping surface parallel to the test base surface, the movable clamp is connected to the movable block and has a second chuck for applying pressure to the clamping surface, and the arrangement direction of the fixed clamp and the movable clamp is parallel to the axial direction of the spring.

[0006] Furthermore, a movable groove is formed between the fixed block and the edge of the base, and the movable block is disposed in the movable groove.

[0007] Furthermore, a support block with a height lower than the test base surface is provided in the movable groove. A support surface is formed on the upper side of the support block. The movable block has a mating surface that mates with the support surface. The mating surface movably overlaps with the upper part of the support surface.

[0008] Furthermore, the movable block has a first connecting portion that overlaps the upper side of the support block and a second connecting portion located between the support block and the fixed block. The movable clamp is connected to the first connecting portion, and the spring is connected to the second connecting portion.

[0009] Furthermore, the supporting surface is provided with a slide rail whose extension direction is coplanar with the axial direction of the spring, and the mating surface is provided with a slide groove that mates with the slide rail.

[0010] Furthermore, the slide groove is provided with a limiting portion to prevent the slide rail from disengaging from the slide groove in a direction perpendicular to the mating surface.

[0011] Furthermore, the supporting surface forms an angle with the test base surface, and in the direction close to the fixing block, the supporting surface extends in the downward direction of the test base surface.

[0012] Furthermore, a positioning member is provided on the upper side of the fixed block. The positioning member includes a movable arm that is movably hinged to the fixed block and a locking head disposed at the end of the movable arm. When the movable arm rotates to a side close to the movable block, the locking head engages between the fixed block and the movable block.

[0013] Furthermore, when the clamping head is inserted between the fixed block and the movable block, the clamping surface is coplanar with the test base surface.

[0014] Furthermore, the corners of the movable block and the base that are close to each other are provided with rounded corner transition structures, and the corners of the movable block and the fixed block that are close to each other are provided with rounded corner transition structures.

[0015] The following beneficial effects can be achieved by applying this utility model: 1. This utility model sets up a fixed clamp and a movable clamp to fix the two sides of the paper. The movable clamp can move away from the fixed clamp through the movable block and spring, thereby tensioning the paper and keeping the paper above the test base flat during the test.

[0016] 2. In some embodiments of this utility model, the movable block slides on the inclined support surface. When the movable block moves away from the fixed clamp, the clamping surface moves to the lower side of the test base, thereby applying an inclined downward force to the paper material to ensure that the paper material always adheres to the test base and does not float.

[0017] 3. In some embodiments of this utility model, a positioning element is provided on the upper side of the fixed block. The locking head of the positioning element can be inserted between the fixed block and the movable block so that the clamping surface is coplanar with the test base surface, which facilitates the placement and fixing of the paper. After the paper is placed and fixed, the locking head can be removed to tighten the paper. Attached Figure Description

[0018] Figure 1 This is a front view of an embodiment of the present invention in a first state; Figure 2 for Figure 1 The illustrated embodiment is a top view in its first state; Figure 3 This is a schematic diagram of the active block in the embodiment; Figure 4 for Figure 1 The illustrated embodiment is a partial structural diagram in the second state; In the figure, 1-base, 11-test base surface, 2-fixed clamp, 21-first chuck, 3-moving clamp, 31-second chuck, 32-end, 4-moving groove, 5-fixed block, 6-moving block, 61-clamping surface, 62-mating surface, 63-slide groove, 7-spring, 8-support block, 81-supporting surface, 82-slide rail, 9-positioning component, 91-moving arm, 92-clamp head. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model. Example

[0020] Reference Figures 1-3 One embodiment of this utility model provides a paper dynamic friction testing platform, which includes a base 1, a fixed clamp 2 disposed on a first side of the base, a movable clamp 3 disposed on a second side of the base, and a tensioning mechanism connected to the movable clamp. A test base surface 11 for placing the paper to be tested is formed on the upper side of the base 1. The fixed clamp 2 has a first clamp 21 for applying pressure to the test base surface 11 and fixing the paper located on the test base surface 11. The tensioning mechanism includes a fixed block 5, a movable block 6, and a spring 7. The fixed block 5 is disposed on the outer side of the horizontal edge of the base 1. The bottom of the fixed block 5 is fixedly connected to the base 1. There is a gap between the fixed block and the base 1 to form a movable groove 4. The movable block 6 is set in the movable groove 4 and is elastically connected to the fixed block 5 through the spring 7. The movable block 6 has a clamping surface 61 parallel to the test base surface 11. The movable clamp 3 is connected to the clamping surface 61, and the movable clamp 3 has a second clamp 31 for applying pressure to the clamping surface 61 and fixing the paper material located on the clamping surface. When the movable block 6 reaches the maximum distance away from the fixed block 5, the clamping surface 61 and the test base surface 11 are aligned and coplanar.

[0021] The working principle of this embodiment is as follows: When conducting a dynamic friction test between two types of paper, one type of paper is laid flat on the test base 11, with the movable block 6 away from the fixed block 5. The spring 7 is stretched, and the fixed clamp 2 and the movable clamp 3 are manipulated to fix both sides of the paper, releasing the positional restriction on the movable block 6. The spring retracts and applies a pulling force to the movable block 6 towards the fixed block 5, thereby applying a pulling force to the paper through the movable clamp 3, making the paper taut. In this embodiment, when fixing the paper, the movable block is in a position away from the fixed block, allowing the spring to store energy. This step can be manually controlled; the tester manually moves the movable block to a position away from the fixed block and clamps and fixes the paper using the movable clamp. After fixing, the movable block is released. Alternatively, this can be achieved through some mechanical structure, for example, in one embodiment, refer to... Figure 1 and Figure 4A positioning element 9 is provided on the upper side of the fixed block 5. The positioning element 9 includes a movable arm 91 that is movably hinged to the fixed block 5 and a locking head 92 located at the end of the movable arm. When the movable arm rotates to the side close to the movable block 6, the locking head engages between the fixed block 5 and the movable block 6, and the clamping surface 61 is aligned with the test base surface 11. After the paper is clamped and fixed by the movable clamp, the paper can be tensioned by removing the locking head 92. To facilitate the removal of the locking head, the movable arm can be provided with a protrusion located on the back side of the locking head to facilitate the operator's rotation of the movable arm. The position and shape of the protrusion should be designed to facilitate the operator's finger application of force. To facilitate the engagement of the locking head 92, the corners of the movable block and the fixed block on the side close to each other are provided with a rounded transition structure.

[0022] In some embodiments of this utility model, reference is made to Figure 3 and Figure 4 A support block 8, lower than the test base 11, is provided in the movable slot 4. A support surface 81 is formed on the upper side of the support block 8. A slide rail 82, extending in the same direction as the spring axis, is provided on the support surface 81. The movable block 6 has a first connecting part overlapping the upper side of the support block 8 and a second connecting part located between the support block and the fixed block. The movable clamp 3 is connected to the first connecting part, and the spring 7 is connected to the second connecting part. The lower side of the first connecting part has a mating surface 62 that mates with the support surface 81. The mating surface has a groove 63 corresponding to the shape of the slide rail 82. The mating surface 62 movably overlaps the upper part of the support surface 81, causing the groove 63 and the slide rail 82 to mate. In a further embodiment, the support surface 81 forms an angle with the test base 11. Near the fixed block 5, the support surface 81 extends downwards towards the test base 11, thereby applying a downward force to the paper material, ensuring that the paper material always adheres to the test base surface and does not float. To prevent the paper from being damaged by the edges and corners, the edges and corners of the movable block and the base that are close to each other are provided with rounded corner transition structures.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A paper dynamic friction testing platform, characterized in that: The device includes a base, a fixed clamp disposed on a first side of the base, a movable clamp disposed on a second side of the base, and a tensioning mechanism connected to the movable clamp. The base has a test base surface. The fixed clamp has a first chuck for applying pressure to the test base surface. The tensioning mechanism includes a fixed block, a movable block, and a spring. The fixed block is fixedly connected to the base. The movable block is elastically connected to the fixed block via the spring. The movable block has a clamping surface parallel to the test base surface. The movable clamp is connected to the movable block and has a second chuck for applying pressure to the clamping surface. The arrangement direction of the fixed clamp and the movable clamp is parallel to the axial direction of the spring.

2. The paper dynamic friction testing platform according to claim 1, characterized in that: A movable groove is formed between the fixed block and the edge of the base, and the movable block is disposed in the movable groove.

3. The paper dynamic friction testing platform according to claim 2, characterized in that: The movable slot is provided with a support block whose height is lower than the test base surface. The upper side of the support block forms a support surface. The movable block has a mating surface that mates with the support surface. The mating surface movably overlaps the support surface.

4. The paper dynamic friction testing platform according to claim 3, characterized in that: The movable block has a first connecting part that overlaps the upper side of the support block and a second connecting part located between the support block and the fixed block. The movable clamp is connected to the first connecting part, and the spring is connected to the second connecting part.

5. The paper dynamic friction testing platform according to claim 3, characterized in that: The supporting surface is provided with a slide rail whose extension direction is coplanar with the axis of the spring, and the mating surface is provided with a slide groove that mates with the slide rail.

6. The paper dynamic friction testing platform according to claim 5, characterized in that: The slide groove is provided with a limiting part to prevent the slide rail from disengaging from the slide groove in a direction perpendicular to the mating surface.

7. The paper dynamic friction testing platform according to claim 3, characterized in that: The supporting surface forms an angle with the test base surface, and in the direction close to the fixing block, the supporting surface extends downward toward the test base surface.

8. The paper dynamic friction testing platform according to claim 1, characterized in that: A positioning element is provided on the upper side of the fixed block. The positioning element includes a movable arm that is movably hinged to the fixed block and a locking head provided at the end of the movable arm. When the movable arm rotates to a side close to the movable block, the locking head engages between the fixed block and the movable block.

9. A paper dynamic friction testing platform according to claim 8, characterized in that: When the clamping head is inserted between the fixed block and the movable block, the clamping surface is coplanar with the test base surface.

10. A paper dynamic friction testing platform according to claim 2, characterized in that: The corners of the movable block and the base that are close to each other are provided with rounded corner transition structures, and the corners of the movable block and the fixed block that are close to each other are provided with rounded corner transition structures.

Images