A rapid plasticity tester for rubber product samples

Abstract

This utility model discloses a rapid plasticity meter for rubber product samples, belonging to the technical field of rubber testing equipment. It includes a machine body, a lifting beam at the top of the machine body, a screw threadedly connected to the middle of the lifting beam, a pressing component fixedly connected to the bottom of the screw, a bearing plate fixed to the top of the machine body at the bottom of the pressing component, a tray at the top of the bearing plate, and a placement groove at the top of the tray. An automatic zeroing mechanism is provided on one side of the lifting beam, and a dial indicator is provided on one side of the automatic zeroing mechanism. A quick-release mechanism is provided between the automatic zeroing mechanism and the dial indicator. This utility model, by setting up an automatic zeroing mechanism and cooperating with a laser rangefinder, achieves high-precision fine-tuning of the dial indicator's testing head position, effectively solving the problem that existing manual zeroing cannot provide precise and detailed adjustment, improving zeroing accuracy, and thus ensuring the accuracy of plasticity testing, which is beneficial to improving the practicality of the device.

Description

Technical Field

[0001] This utility model relates to the technical field of rubber testing equipment, and more specifically to a rapid plasticity meter for rubber product samples. Background Technology

[0002] A rapid plasticity tester is a professional testing device that evaluates the quality of natural rubber and unvulcanized rubber by measuring the plastic deformation value of rubber samples under specific temperature, pressure and time conditions. Its principle is to rapidly compress a cylindrical sample between two parallel blocks to a fixed thickness, and the test thickness under constant pressure after the sample is held in a compressed state for a certain period of time is taken as the measure of plasticity.

[0003] In the market, rapid plasticity testers for rubber products typically use springs or levers to apply the required 100N force from bottom to top to the sample. Before testing the sample, the test head of the rapid plasticity tester needs to be manually zeroed to ensure the accuracy of the plasticity test. However, this manual zeroing method is not only time-consuming and laborious, but also makes it difficult to achieve precise and fine adjustments, affecting the test accuracy. In addition, the installation and disassembly of the dial indicator are cumbersome, and it is inconvenient to replace and maintain when different models or specifications of dial indicators are needed for testing. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the detection head of a rapid plasticity meter cannot be precisely adjusted by manual zeroing, and to provide a rapid plasticity meter for rubber product samples.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A rapid plasticity tester for rubber product samples includes a body, a lifting beam at the top of the body, a screw threadedly connected to the middle of the lifting beam, a pressing component fixedly connected to the bottom of the screw, a bearing plate fixed to the top of the body at the bottom of the pressing component, a tray at the top of the bearing plate, a placement groove at the top of the tray, an automatic zeroing mechanism on one side of the lifting beam, a dial indicator on one side of the automatic zeroing mechanism, and a quick-release mechanism between the automatic zeroing mechanism and the dial indicator.

[0006] As a further description of the above technical solution, the automatic zeroing mechanism includes a fixed plate fixed on the lifting beam, a through groove is provided on one side of the fixed plate, a drive motor is fixedly installed on the top of the fixed plate, a lead screw is fixedly connected to the output end of the drive motor, and a moving block is threadedly connected to one end of the lead screw located in the through groove.

[0007] As a further description of the above technical solution, the bottom end of the lead screw is connected to the bearing of the fixed plate, and a laser rangefinder is fixedly installed on the inner top wall of the lifting beam.

[0008] As a further description of the above technical solution, the quick-release mechanism includes a fixed block fixed to one side of the moving block and an insert block fixed to the back of the dial indicator. The fixed block has a slot on one side that matches the insert block. The top of the insert block has a sliding groove, and one side of the sliding groove has a sliding groove. A snap-fit ​​component is provided in the sliding groove.

[0009] As a further description of the above technical solution, the snap-fit ​​assembly includes a guide rod disposed in the slide groove, with sliders movably sleeved at both ends of the guide rod, and a spring sleeved on the guide rod and located between the two sliders. A sliding block that is slidably connected to the slide groove is fixedly connected to one side of the slider, and a locking rod is fixedly connected to one side of the sliding block.

[0010] As a further description of the above technical solution, the snap-fit ​​assembly also includes symmetrically opened locking holes on both sides of the slot that are adapted to the locking rod, and the outer end of the locking rod is rounded.

[0011] As a further description of the above technical solution, the slider is slidably connected to the inner wall of the groove, and a pressing block is fixedly connected to each side of the two sliders that are far apart from each other. Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, by setting up an automatic zeroing mechanism, facilitates the up-and-down movement and adjustment of the dial indicator, and can stably and reliably drive the dial indicator's detection head to adjust its position, ensuring the stability of the zeroing process. With the cooperation of a laser rangefinder, precise distance adjustment is achieved, realizing high-precision fine-tuning of the dial indicator's detection head position. This effectively solves the problem that existing manual zeroing cannot achieve precise and fine adjustment, improves zeroing accuracy, and thus ensures the accuracy of plasticity testing, which is conducive to improving the practicality of the device.

[0012] 2. This utility model, through its quick-release mechanism, allows operators to quickly install and disassemble the dial indicator without using complex tools, reducing operational difficulty and facilitating the maintenance and replacement of the dial indicator. When different models or specifications of dial indicators are required for testing, quick disassembly and assembly are possible, improving the applicability and flexibility of the rapid plasticity meter under different testing requirements. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a rapid plasticity tester for rubber product samples.

[0014] Figure 2 This is a partially enlarged schematic diagram of a rapid plasticity tester for rubber product samples.

[0015] Figure 3 This is a schematic diagram of the automatic zeroing mechanism of a rapid plasticity tester for rubber product samples.

[0016] Figure 4 This is a schematic diagram of the quick-release mechanism of a rapid plasticity tester for rubber product samples.

[0017] Reference numerals: 1. Body; 2. Lifting beam; 3. Automatic zeroing mechanism; 31. Fixing plate; 32. Through groove; 33. Drive motor; 34. Lead screw; 35. Moving block; 4. Dial indicator; 5. Quick release mechanism; 51. Fixing block; 52. Insert block; 53. Slot; 54. Slide groove; 55. Sliding groove; 56. Guide rod; 57. Spring; 58. Slider; 59. Pressing block; 510. Sliding block; 511. Locking rod; 512. Locking hole; 6. Screw; 7. Lowering component; 8. Tray; 9. Bearing plate; 10. Placement groove; 11. Laser rangefinder. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0019] This utility model provides a rapid plasticity tester for rubber product samples. Please refer to [reference needed]. Figures 1-4 As shown, the device includes a body 1, a lifting beam 2 on the top of the body 1, a screw 6 threadedly connected to the middle of the lifting beam 2, a pressing component 7 fixedly connected to the bottom of the screw 6, a bearing plate 9 fixed to the top of the body 1 at the bottom of the pressing component 7, a tray 8 on the top of the bearing plate 9, a placement groove 10 on the top of the tray 8, an automatic zeroing mechanism 3 on one side of the lifting beam 2, a dial indicator 4 on one side of the automatic zeroing mechanism 3, and a quick-release mechanism 5 between the automatic zeroing mechanism 3 and the dial indicator 4.

[0020] In this embodiment, before sample testing, the drive motor 33 is started to rotate the lead screw 34. The lead screw 34 then drives the moving block 35 to slide up and down along the through groove 32, thereby moving the dial indicator 4 up and down for adjustment. Automatic calibration is performed until the dial indicator 4 reads a whole 100 when no sample is present. With the assistance of the laser rangefinder 11, the distance between the dial indicator 4 and the carrier plate 9 is detected in real time, achieving precise adjustment until the dial indicator 4's probe contacts the carrier plate 9 and reaches zero. This enables high-precision fine-tuning of the dial indicator 4's probe position, improving zeroing accuracy. Precision is ensured, thus guaranteeing the accuracy of plasticity testing. Adjustment is achieved by rotating screw 6, which moves the lower pressure component 7 up and down, facilitating manual zeroing. After zeroing, the rubber sample is placed in the placement groove 10, and the lifting beam 2 begins operation. The lifting beam 2 includes a U-shaped frame with mounting cylinders at both ends of its bottom. Cylinders are installed inside the mounting cylinders, and the cylinder piston rods are fixedly connected to the U-shaped frame. The cylinders move the U-shaped frame downwards, thereby moving the lower pressure component 7 downwards. After the sample is compressed, the reading of the dial gauge 4 is recorded. Subtracting the reading from one hundred gives the plasticity value. This method facilitates testing and calibration, making testing convenient.

[0021] Furthermore, the automatic zeroing mechanism 3 includes a fixed plate 31 fixed on the lifting beam 2. A through groove 32 is provided on one side of the fixed plate 31. A drive motor 33 is fixedly installed on the top of the fixed plate 31. A lead screw 34 is fixedly connected to the output end of the drive motor 33. The bottom end of the lead screw 34 is connected to the bearing of the fixed plate 31. A moving block 35 is threadedly connected to one end of the lead screw 34 located in the through groove 32. A laser rangefinder 11 is fixedly installed on the inner top wall of the lifting beam 2.

[0022] In operation, the drive motor 33 is started to rotate the lead screw 34, which in turn drives the moving block 35 to slide up and down along the through groove 32. This causes the dial indicator 4 to move up and down for adjustment, thereby adjusting the distance and automatically correcting it until the reading of the dial indicator 4 when pressed down is a whole 100. With the cooperation of the laser rangefinder 11, the distance information between the dial indicator 4 and the carrier plate 9 is detected in real time to achieve precise distance adjustment until the detection head of the dial indicator 4 contacts the carrier plate 9 and reaches the zero position. This enables high-precision fine adjustment of the position of the detection head of the dial indicator 4 and improves the zeroing accuracy.

[0023] Furthermore, the quick-release mechanism 5 includes a fixed block 51 fixed to one side of the movable block 35 and an insert block 52 fixed to the back of the dial indicator 4. The fixed block 51 has a slot 53 on one side that is compatible with the insert block 52. The top of the insert block 52 has a sliding groove 54. The side of the sliding groove 54 has a sliding groove 55. A snap-fit ​​component is provided in the sliding groove 54. The snap-fit ​​assembly includes a guide rod 56 disposed in the slide groove 54. Both ends of the guide rod 56 are movably sleeved with sliders 58. The sliders 58 are slidably connected to the inner wall of the slide groove 54. Pressing blocks 59 are fixedly connected to the sides of the two sliders 58 that are far apart from each other. A spring 57 is sleeved on the guide rod 56 and located between the two sliders 58. A sliding block 510 that is slidably connected to the slide groove 55 is fixedly connected to one side of the slider 58. A locking rod 511 is fixedly connected to one side of the sliding block 510. The snap-fit ​​assembly also includes locking holes 512 that are symmetrically opened on both sides of the slot 53 and are adapted to the locking rod 511. The outer end of the locking rod 511 is rounded.

[0024] In use, when the dial indicator 4 needs to be replaced, first press the pressing block 59. The pressing block 59 drives the slider 58 to move along the slide groove 54 towards the center, which in turn drives the locking rod 511 to move towards the center and disengage from the locking hole 512, thus releasing the lock on the insert 52. Then, simply pull the dial indicator 4 outward to disengage the insert 52 from the slot 53, and it can be removed. During installation, simply align the insert 52 with the slot 53 and insert it. Then release the pressing block 59. Under the rebound force of the spring 57, the two sliders 58 will move along the slide groove 54 towards the center. The dial indicator 4 slides relative to each other on the sliding groove 54, thereby driving the two sliding blocks 510 to move relative to each other on the sliding groove 55, which in turn drives the two locking rods 511 to move relative to each other on the sliding groove 55 and insert them into the locking holes 512, thus completing the installation. The operation is convenient and does not require the use of complicated tools. The installation and removal of the dial indicator 4 can be completed quickly, reducing the difficulty of operation and facilitating the maintenance and replacement of the dial indicator 4. When different models or specifications of dial indicators 4 need to be used for testing, they can be quickly disassembled and assembled, improving the applicability and flexibility of the rapid plasticity meter under different testing needs.

[0025] The working principle of this utility model is as follows: Before sample testing, the drive motor 33 is started to drive the lead screw 34 to rotate, thereby the lead screw 34 drives the moving block 35 to slide up and down along the through groove 32, thereby driving the dial indicator 4 to move up and down for adjustment, thus adjusting the distance and automatically correcting it. The correction is performed until the reading of the dial indicator 4 when there is no sample is pressed down is a whole 100. With the cooperation of the laser rangefinder 11, the distance information between the laser rangefinder 11 and the carrier plate 9 is detected in real time to achieve precise distance adjustment until the detection head of the dial indicator 4 contacts the carrier plate 9 and reaches the zero position. This enables high-precision fine adjustment of the position of the detection head of the dial indicator 4, improving the zeroing accuracy. After zeroing, the rubber sample is placed in the placement groove 10, and the lifting beam 2 starts to work, driving the pressing part 7 to move down and squeeze the sample. At this time, the reading of the dial indicator 4 is recorded. Then, the plasticity value is obtained by subtracting the reading from 100. The detection and correction are convenient and easy to detect. When the dial indicator 4 needs to be replaced, first press the pressing block 59. The pressing block 59 drives the slider 58 to move along the slide groove 54 towards the center, which in turn drives the locking rod 511 to move towards the center and disengage from the locking hole 512, thus releasing the lock on the insert 52 and making it easy to remove. During installation, simply align the insert 52 with the slot 53 and insert it, then release the pressing block 59. Under the rebound force of the spring 57, the two sliders 58 will be pushed to slide relative to each other along the slide groove 54, thereby driving the two sliding blocks 510 to move relative to each other along the slide groove 55, which in turn drives the two locking rods 511 to move relative to each other and insert into the locking hole 512, thus completing the installation. The operation is convenient and facilitates the maintenance and replacement of the dial indicator 4.

[0026] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A rapid plastometre for a test specimen of a rubber article, characterized by: The device includes a body (1), a lifting beam (2) is provided on the top of the body (1), a screw (6) is threadedly connected to the middle of the lifting beam (2), a pressing component (7) is fixedly connected to the bottom of the screw (6), a bearing plate (9) fixed to the top of the body (1) is provided at the bottom of the pressing component (7), a tray (8) is provided on the top of the bearing plate (9), a placement groove (10) is provided on the top of the tray (8), an automatic zeroing mechanism (3) is provided on one side of the lifting beam (2), a dial indicator (4) is provided on one side of the automatic zeroing mechanism (3), and a quick-release mechanism (5) is provided between the automatic zeroing mechanism (3) and the dial indicator (4).

2. A rapid plastometre for testing rubber articles according to claim 1, characterised in that: The automatic zeroing mechanism (3) includes a fixed plate (31) fixed on the lifting beam (2). A through groove (32) is provided on one side of the fixed plate (31). A drive motor (33) is fixedly installed on the top of the fixed plate (31). A lead screw (34) is fixedly connected to the output end of the drive motor (33). A moving block (35) is threadedly connected to one end of the lead screw (34) located in the through groove (32).

3. A rapid plastometre for testing rubber articles according to claim 2, characterised in that: The bottom end of the lead screw (34) is connected to the bearing of the fixed plate (31), and a laser rangefinder (11) is fixedly installed on the inner top wall of the lifting beam (2).

4. A rapid plastometer for testing a sample of a rubber article according to claim 2, characterized in that: The quick-release mechanism (5) includes a fixed block (51) fixed on one side of the movable block (35) and an insert block (52) fixed on the back of the dial indicator (4). The fixed block (51) has a slot (53) on one side that is compatible with the insert block (52). The top of the insert block (52) has a sliding groove (54). The sliding groove (54) has a sliding groove (55) on one side. A snap-fit ​​component is provided in the sliding groove (54).

5. A rapid plastometre for testing rubber articles according to claim 4, characterised in that: The snap-fit ​​assembly includes a guide rod (56) disposed in the slide groove (54), with sliders (58) movably sleeved at both ends of the guide rod (56), and a spring (57) sleeved on the guide rod (56) and located between the two sliders (58). A sliding block (510) is fixedly connected to one side of the slider (58) and slidably connected to the slide groove (55), and a locking rod (511) is fixedly connected to one side of the sliding block (510).

6. A rapid plastometer for testing a sample of a rubber article according to claim 5, characterized in that: The snap-fit ​​assembly also includes lock holes (512) symmetrically opened on both sides of the slot (53) to match the lock rod (511), and the outer end of the lock rod (511) is rounded.

7. A rapid plastometer for testing a sample of a rubber article as defined in claim 5, characterized in that: The slider (58) is slidably connected to the inner wall of the groove (54), and a pressing block (59) is fixedly connected to the side of the two sliders (58) that are far apart from each other.

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