A sampling knife for ring compression strength test

Abstract

The application discloses a sampling cutter for ring pressure strength test, and belongs to the technical field of paper sampling devices.The sampling cutter comprises a base plate, a fixing column, a fixing plate, a lifting frame and a pressing mechanism, the lower end of the base plate is fixedly provided with a guide slide frame, the guide slide frame is slidably connected with an inclined table, the base plate and the lifting frame are respectively fixedly provided with a lower mold table and an upper cutter table, the front end of the lower mold table is provided with a paper placing table, the front end of the paper placing table is fixedly provided with two supporting legs, the lifting frame is provided with a pressing frame, the lifting frame and the pressing frame are connected with a compression spring, the paper placing table is connected with a feeding mechanism close to the end of the lower mold table, the feeding mechanism comprises a connecting rod, a rotating arm and a rotating rod, the connecting rod is connected with the rotating arm, the connecting position is located below the middle end of the rotating arm, the upper end of the rotating arm is rotatably connected with a threaded rod, and the threaded rod is fixedly provided with a roller.The sampling cutter is convenient for users to recover the sampling paper for ring pressure test after sampling, prevents the left and right skew of the paper during movement, and indirectly improves the sampling efficiency of the sample.

Description

Technical Field

[0001] This application relates to the field of paper sampler technology, and more specifically, to a sampling knife for ring crush strength testing. Background Technology

[0002] The ring crush sampler, also known as a ring crush knife, is a special sampling knife for testing the ring crush strength of paper and paperboard. It is mainly used for sampling during the ring crush test of paper and paperboard and is an essential accessory for the compression strength tester, also known as the ring crush tester. In the paper sampling process, the fiber direction of the paper to be sampled must first be determined. This is usually done by tearing the paper by hand and observing it. Then, the paper is placed on the platform and aligned before sampling. During the operation, sampling needs to be performed at the synchronous position of the paper, so the paper needs to be pushed and moved repeatedly. However, the paper is prone to tilting during movement, which will cause the sample to have a deviation in the fiber direction of movement. In addition, the sample is prone to getting stuck at the discharge port of the platform after sampling. For platforms with low bases, the platform needs to be tilted, which poses a risk of movement.

[0003] Therefore, a sampling knife for ring crush strength testing is needed to solve the above problems. Utility Model Content

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] To address the technical problems mentioned in the background section, some embodiments of this application provide a sampling knife for ring crush strength testing, including a downward-opening chassis. Support frames are attached to both sides of the opening of the chassis. A fixed column is fixed to the upper end of the chassis, and a fixed plate is fixed to the upper end of the fixed column. A lifting frame that can slide up and down is provided on the outer periphery of the fixed column. A pushing mechanism is connected between the fixed plate and the lifting frame. A lower die platform and an upper knife platform are respectively installed on the chassis and the lifting frame. A paper-feeding platform is provided at the front end of the lower die platform. A threaded hole is provided between the lower die platform and the paper-feeding platform for connecting threaded components. A guide frame is fixed to the lower end of the chassis, and an inclined platform that can slide back and forth is connected to the guide frame.

[0006] Furthermore, an inner cylinder and an outer cylinder are respectively installed at the close ends of the chassis and the lifting frame. The inner cylinder and the outer cylinder are distributed on the outer periphery of the fixed column and are fitted together. The inner cylinder and the outer cylinder are provided with a return spring connecting the fixed column and the lifting frame. The lifting frame is provided with a pressure frame that can slide up and down. A compression spring is connected between the lifting frame and the pressure frame. The lower end of the upper cutter table is inserted into the pressure frame and does not exceed the lower end face of the pressure frame (when the compression spring is in a free state). The chassis is provided with a discharge port at the lower mold table. The discharge port is set to expand from top to bottom. The lower part of the inclined platform is set to tilt downward.

[0007] Furthermore, a receiving plate with the same inclination direction is fixed at the front end of the inclined platform, the lower end of the receiving plate is set on the same side as the lower end face of the paper feeding table support, the left and right width of the receiving plate is less than the distance between two right angles, and a limiting block is fixed at the rear end of the guide slide to block the inclined platform.

[0008] Furthermore, the feeding mechanism includes a connecting rod located at the lower end of the paper feeding platform. Rotating arms are fixed at both ends of the connecting rod, and rotating rods are fixed at both ends of the paper feeding platform. The rotating rods are rotatably engaged with the rotating arms. Threaded rods are rotatably connected to the upper ends of the two rotating arms. Rollers are fixed to the outer circumference of the two threaded rods. Threaded pressure blocks are threadedly connected to the outer circumference of the threaded rods. The threaded pressure blocks slide within the rollers to fix the counterweight. Synchronizing rods are inserted into the adjacent ends of the two threaded rods. The rotating rods are connected to the lower middle part of the rotating arms.

[0009] The beneficial effects of this application are as follows:

[0010] 1. By setting the opening at the chassis to be flared downwards at the discharge port, the sampling paper is prevented from getting stuck at the discharge port and being unable to fall. A guide frame fixed at the lower end of the chassis is used to slide a ramp on the guide frame, so that the receiving plate integrated with the ramp abuts against the lower end surface. The ramp is tilted to facilitate the sliding of the sampling paper. By shortening the distance between the left and right ends of the receiving plate, the receiving plate can slide forward from the support feet at the paper feeding platform, which makes it convenient for users to collect the sampling paper for ring crush testing after sampling.

[0011] 2. By connecting the rollers to the rotating arms, the rotating arms are positioned on both sides of the paper feeding table under the rotation of the rotating rod. The rollers on both sides naturally abut against the paper on the paper feeding table, preventing the rollers from excessively squeezing the paper and causing it to bend during the movement. Under the connection of the synchronizing rod, the rotation of the two rollers is controlled synchronously, thereby preventing the paper from tilting to the left or right during the movement. This prevents the paper from tilting and causing changes in the direction of the paper fibers during sampling, thus indirectly improving the sampling efficiency. Attached Figure Description

[0012] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0013] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0014] In the attached diagram:

[0015] Figure 1 This is a schematic diagram of the overall structure according to one embodiment of this application;

[0016] Figure 2 yes Figure 1 A schematic diagram of the front view structure in the embodiment;

[0017] Figure 3 yes Figure 1 Cross-sectional view of the embodiment;

[0018] Figure 4 yes Figure 1 A schematic diagram of the structure from below in the embodiment;

[0019] Figure 5 yes Figure 1 A partially enlarged schematic diagram of the feeding mechanism in the embodiment;

[0020] Figure 6 yes Figure 1 A partially enlarged schematic diagram of point A in the embodiment.

[0021] Figure label:

[0022] 10. Chassis; 11. Support frame; 12. Fixed column; 13. Fixed plate; 14. Lifting frame; 15. Pushing mechanism; 16. Upper knife table; 17. Lower die table; 18. Paper feeding table; 19. Feeding mechanism; 20. Guide slide; 21. Inclined platform; 22. Inner cylinder; 23. Outer cylinder; 24. Return spring; 25. Discharge port; 26. Receiving plate; 27. Set bolt; 28. Compression spring; 29. ​​Pressure frame; 30. Connecting rod; 31. Rotating arm; 32. Rotating rod; 33. Threaded rod; 34. Roller; 35. Threaded pressure block; 36. Synchronizing rod. Detailed Implementation

[0023] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0024] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0025] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0026] It should be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] It should be noted that, in this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0029] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Reference Figure 1-2A sampling knife for ring crush strength testing includes: a base 10 with an opening facing downwards; support frames 11 are attached to both sides of the opening of the base 10; the base 10 and the support frames 11 are fixedly connected by threaded parts; two left-right distributed fixing posts 12 are fixedly mounted on the upper end of the base 10; a fixing plate 13 is fixedly mounted on the upper end of the fixing posts 12; a lifting frame 14 that can slide up and down is provided on the outer periphery of the fixing posts 12; the fixing posts 12 and the fixing plate 13 are fixedly connected by nuts; a pushing mechanism 15 is connected to the upper end of the fixing plate 13; the lower end of the pushing mechanism 15 is connected to the lifting frame 14; an upper knife table 16 is inserted and fitted into the lower end of the lifting frame 14; a set bolt 27 is fixedly mounted between the lifting frame 14 and the upper knife table 16; the set bolt 27 is located on the lifting frame 14. The lower die platform 17 is fixedly installed on the upper surface of the chassis 10 and directly below the upper die holder 16, with the lower die platform 17 being fixedly connected by four lower modules. The lower modules include two located in the middle and two located in the front and back. The lower modules are fixedly connected to the chassis 10 by threaded parts. The front end of the lower die platform 17 abuts against the paper feeding platform 18. A threaded hole is provided between the lower die platform 17 and the paper feeding platform 18 for connecting the threaded parts. The paper feeding platform 18 extends forward beyond the front end of the chassis 10. The front end of the paper feeding platform 18 is fixedly provided with two support legs that are downward and on the same plane as the lower end of the support frame 11. The lower end of the chassis 10 is fixedly provided with two guide rails 20 that are distributed in the left and right. The two guide rails 20 are connected to inclined platforms 21 that can slide back and forth.

[0031] Two support frames 11 are respectively abutted against the two sides of the chassis 10, and threaded parts are installed on the upper end of the chassis 10 to fix the support frames 11. The support frames 11 increase the distance between the chassis 10 and the lower end surface, which facilitates the recycling of the sample paper. The fixing plate 13 is fixedly installed on the upper end of the chassis 10 by the fixing column 12. The lifting frame 14 is slidably arranged on the outer periphery of the fixing column 12 and located at the lower end of the fixing plate 13. The paper is placed flat on the upper end of the paper feeding table 18, and the feeding mechanism 19 is abutted against the paper. Above, the paper is pushed to the lower die table 17 for sampling. When in use, the pressing mechanism 15 is pushed down, so that the connecting part of the pressing mechanism 15 pushes the lifting frame 14 down, so that the lifting frame 14 moves down along the fixed column 12, thereby moving the upper knife table 16 fixed on the lifting frame 14 down to the lower die table 17 for paper sampling. The upper knife table 16 can be replaced at the lifting frame 14 by removing and installing the set bolt 27. The set bolt 27 is designed on the front side for easy disassembly by the user.

[0032] Reference Figure 2-3The chassis 10 and the lifting frame 14 are respectively equipped with an inner cylinder 22 and an outer cylinder 23 at their close ends. The inner cylinder 22 and the outer cylinder 23 are distributed on the outer periphery of the two fixed columns 12. The inner cylinder 22 and the outer cylinder 23 are fitted together. The inner cylinder 22 and the outer cylinder 23 are provided with a return spring 24 connecting the fixed column 12 and the lifting frame 14. The lifting frame 14 is provided with a pressure frame 29 that can slide up and down. A compression spring 28 is connected between the lifting frame 14 and the pressure frame 29. The lower end of the upper blade table 16 is inserted into the pressure frame 29 and does not exceed the lower end face of the pressure frame 29. The chassis 10 is provided with a discharge port 25 at the lower mold table 17. The discharge port 25 is set to expand from top to bottom. The opening of the lower mold table 17 is consistent with the discharge port 25 and is located directly below the upper blade table 16 (shear type fit). The lower part of the inclined table 21 is set to tilt downward.

[0033] The pressure frame 29 is used to first contact the paper during the downward pressing process, and press the paper with the reaction force of the pressure spring 28 to prevent the paper from sliding. Then, during the downward movement of the upper blade table 16, it cooperates with the lower die table 17 to cut the paper up and down to complete the sampling. The paper is pushed by the upper blade table 16 to the discharge port 25, and slides down through the discharge port 25 to the inclined table 21. By moving the inclined table 21 forward, the sampled paper on the inclined table 21 is retrieved. After the end, it is reset by the return spring 24 and the pressure spring 28.

[0034] Reference Figure 2 and Figure 4 The front end of the inclined platform 21 is fixed with a receiving plate 26 with the same inclination direction. The lower end of the receiving plate 26 is set on the same side as the lower end of the paper table 18 support. The left and right width of the receiving plate 26 is less than the distance between two right angles. The rear end of the guide slide 20 is fixed with a limiting block to block the inclined platform 21.

[0035] The width of the receiving plate 26 at the front end is reduced so that the receiving plate 26 can move forward smoothly by passing the obstruction at the two legs of the paper feeding table 18. This allows the receiving plate 26 to move forward to a more position, making it easier for the user to collect the sample paper on the receiving plate 26. After collection, the inclined table 21 is pushed to reset, and the inclined table 21 stops after abutting against the limit block.

[0036] Reference Figure 5-6The feeding mechanism 19 includes a connecting rod 30 located at the lower end of the paper feeding platform 18. Rotating arms 31 are fixed to both ends of the connecting rod 30. Rotating rods 32 are fixed to both the left and right ends of the paper feeding platform 18. The rotating rods 32 rotatably engage with the rotating arms 31. Threaded rods 33 are rotatably connected to the upper ends of both rotating arms 31. Rollers 34 are fixed to the outer circumference of both threaded rods 33. The rollers 34 are hollow and have brackets for fixing at the ends where they are fixedly connected to the threaded rods 33. Threaded pressure blocks 35 are threadedly connected to the outer circumference of the threaded rods 33, sliding within the rollers 34 to fix the counterweight. Synchronizing rods 36 are inserted into the adjacent ends of the two threaded rods 33. Threaded components are used to fix the threaded rods 33 and the synchronous rods 36. The rotating rods 32 are connected to the lower middle part of the rotating arms 31. Anti-slip textures are provided on the outer circumference of the rollers 34. Pulling the connecting rod 30 forward causes the rotating arms 31 to swing about the rotating rods 32 as a rotation axis, thereby disengaging the rollers 34. When the paper is placed on the paper feeding platform 18, it can be pushed to the lower die platform 17. In the subsequent process, by pushing the roller 34 to rotate, the paper placed on the paper feeding platform 18 is pushed backward to prevent the paper from sliding left and right. The synchronous rotation of the two rollers 34 is achieved by connecting the synchronous rod 36. The rotating rod 32 is located in the lower middle part of the rotating arm 31, so that the roller 34 is in contact with the paper feeding platform 18 under normal conditions, and is in contact with the paper when it is placed. The anti-slip texture on the outer circumference of the roller 34 prevents the paper from moving, and the stability is improved by changing the weight at the roller 34. After removing the synchronous rod 36 on the two threaded pressure blocks 35 and unscrewing the threaded pressure blocks 35 from the threaded rod 33, the counterweights of different weights are inserted into the roller 34 through the threaded rod 33. The threaded pressure blocks 35 are then screwed into the counterweights through the threaded connection at the threaded rod 33 to abut against the counterweights. The stability is improved by increasing the weight.

[0037] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A sampling knife for ring crush strength testing, comprising a base (10), a fixed column (12), a fixed plate (13), a lifting frame (14), and a pushing mechanism (15), characterized in that: A guide frame (20) is fixedly provided at the lower end of the chassis (10). A ramp (21) is slidably connected to the guide frame (20). A lower die table (17) and an upper knife table (16) are fixedly provided between the chassis (10) and the lifting frame (14). The upper knife table (16) and the lower die table (17) are in a shearing fit. The front end of the lower die table (17) abuts against a paper feeding table (18). Two support legs are fixedly provided at the front end of the paper feeding table (18). A pressure frame (29) that can slide up and down is provided on the lifting frame (14). A compression spring (28) is connected between the lifting frame (14) and the pressure frame (29). The upper knife table (16) is inserted into the pressure frame (29), and the lower end face of the upper knife table (16) does not exceed the lower end face of the pressure frame (29). A feeding mechanism (1) is connected to the end of the paper feeding table (18) near the lower die table (17). 9) The feeding mechanism (19) includes a connecting rod (30) located below the paper feeding platform (18). Both ends of the connecting rod (30) are fixed with rotating arms (31). Both ends of the paper feeding platform (18) are fixed with rotating rods (32) that are rotatably connected to the rotating arms (31). The connection between the rotating rods (32) and the rotating arms (31) is located slightly below the middle of the rotating arms (31). The upper end of the rotating arms (31) is rotatably connected with a threaded rod (33). A roller (34) is fixed on the threaded rod (33). The distance between the two rollers (34) is less than the left and right length of the upper knife table (16). An inner cylinder (22) and an outer cylinder (23) are respectively provided between the chassis (10) and the lifting frame (14). The inner cylinder (22) and the outer cylinder (23) are inserted and fitted together, and a return spring (24) is connected inside.

2. The sampling knife for ring crush strength testing according to claim 1, characterized in that: The chassis (10) is provided with a discharge port (25) that is open at the top and bottom, and the discharge port (25) is set downward in a wide-mouth shape.

3. A sampling knife for ring crush strength testing according to claim 1, characterized in that: The feeding mechanism (19) also includes a threaded pressure block (35) threadedly connected to the outer periphery of the threaded rod (33). Synchronizing rods (36) are inserted into the adjacent ends of the two threaded rods (33). Threaded parts are used to fix the threaded rods (33) and the synchronizing rods (36).

4. A sampling knife for ring crush strength testing according to claim 1, characterized in that: The lifting frame (14) and the upper knife table (16) are connected and fixed with a set bolt (27). The set bolt (27) is located on the front side of the lifting frame (14) and is distributed on the left and right sides.

5. A sampling knife for ring crush strength testing according to claim 1, characterized in that: The lower end of the inclined platform (21) is inclined downward, and the rear end of the guide slide (20) is fixed with a limiting block that abuts against the rear end face of the inclined platform (21). The front end of the inclined platform (21) is provided with a receiving plate (26), and the left and right width of the receiving plate (26) is smaller than the distance between the two legs of the paper feeding table (18).

6. A sampling knife for ring crush strength testing according to claim 3, characterized in that: The chassis (10) has an opening facing downwards, and support frames (11) are attached to both the left and right sides of the lower end of the chassis (10). The two legs on the paper feeding platform (18) are flush with the lower end of the support frame (11).

Images