A mold for a dynamic shear rheometer cone and plate fixture

Abstract

The utility model relates to road engineering test tool field discloses a mould for dynamic shear rheometer cone plate clamp, including mould one and mould two, both are semicircular structure and section is L shape, the mould one and mould two splice after, the positioning hole for positioning sample to be measured is formed to the top, the annular structure that forms with the heating platform of cone plate clamp is adapted to the bottom, the axis of positioning hole coincides with the annular structure axis formed after splicing, to ensure that the sample to be measured is accurately centered and placed in the center of heating platform, through the top positioning hole formed by first mould and second mould splicing, the placement position of sample to be measured (such as pitch round piece) is forcedly restricted, ensures that the center point thereof is strictly aligned with the center of heating platform, fundamentally avoids the occurrence of experimental time extension, sample waste problem caused by manual placement deviation.

Description

Technical Field

[0001] This utility model relates to the field of road engineering testing equipment, and more specifically, to a mold for a cone plate clamp for a dynamic shear rheometer. Background Technology

[0002] In the road construction industry, dynamic shear rheometers are currently widely used for evaluating the viscoelastic properties of asphalt materials. Commonly used test fixtures include flat plates, conical plates, and circular barrels. Figure 1 The diagram shows a schematic of the existing cone-plate clamp for a dynamic shear rheometer, including a heating platform 11 mounted on the body 10 and an upper conical clamp 12 mounted on the body 10 to cooperate with the heating platform 11. Due to its conical structure and the soft texture of asphalt at room temperature, the cone-plate clamp cannot maintain its conical shape indefinitely. Therefore, it cannot be made into a conical shape during sample preparation. Generally, the sample to be tested is cast into a thin disc and then placed between the clamps for testing. If the sample quantity is large, it will lead to sample waste and difficulty in sample correction. If the sample quantity used in the testing process is minimized while meeting the testing requirements, new problems arise. That is, if the center point of the sample is placed slightly off-center, it is easy for the sample to not completely fill the gap between the upper conical clamp 12 and the heating platform 11, making it impossible to conduct the test.

[0003] In summary, the existing cone plate fixtures have the following defects in the testing process: incorrect placement of the test sample leads to the need to replace the sample, resulting in extended testing time and sample waste. Utility Model Content

[0004] The present invention aims to overcome at least one of the defects of the prior art and provide a mold for a cone plate clamp of a dynamic shear rheometer, which solves the technical problem of prolonged test time and sample waste caused by the incorrect placement of test samples.

[0005] The technical solution adopted by this utility model is a mold for a cone-plate fixture of a dynamic shear rheometer, including mold one and mold two, both of which are semi-circular structures with an L-shaped cross-section; after the mold one and mold two are spliced ​​together, a positioning hole for positioning the sample to be tested is formed at the top, and an annular structure adapted to the heating platform of the cone-plate fixture is formed at the bottom. The axis of the positioning hole coincides with the axis of the annular structure formed after splicing, so as to ensure that the sample to be tested is accurately centered in the center of the heating platform; a buckle assembly is provided at the joint of the mold one and mold two, and the mold one and mold two are fixedly connected by the buckle assembly.

[0006] The ring structure of the mold is directly fitted onto the heating platform, forming a physical limit. Operators only need to place the sample into the positioning hole to achieve precise positioning without repeated adjustments, significantly shortening sample preparation time. The top positioning hole formed by the splicing of the first and second molds forcibly constrains the placement of the sample to be tested (such as asphalt discs), ensuring that its center point is strictly aligned with the center of the heating platform. This fundamentally avoids the problem of prolonged experimental time and sample waste caused by manual placement deviations.

[0007] Furthermore, the buckle assembly includes a hook and a stop strip; two sets of buckle assemblies are symmetrically arranged at the joints on both sides, wherein the hook on one side is fixed to the outer circle of one end of the mold, and the stop strip is fixed to the outer circle of the other end of the mold; the hook on the other side is fixed to the outer circle of the other two ends of the mold, and the stop strip is fixed to the outer circle of one end of the mold.

[0008] Furthermore, the ends of mold one and mold two are respectively provided with clearance platforms, and after splicing, the clearance platforms on both sides form a receiving groove.

[0009] Furthermore, it also includes a first silicone sleeve fitted to the bottom of mold one and a second silicone sleeve fitted to the bottom of mold two; both the first silicone sleeve and the second silicone sleeve are semi-circular groove structures, and after being spliced, the inner side forms a smooth circumferential surface, and the side is accommodated in the receiving groove.

[0010] Furthermore, the inner edge height of the first and second silicone sleeves is greater than the outer edge height, and they are made of high-temperature resistant silicone material.

[0011] Furthermore, one end face of the mold is provided with an insertion hole, and the other end face of the mold is provided with an insertion post that matches the insertion hole; during assembly, the insertion post is inserted into the insertion hole to achieve end positioning.

[0012] Furthermore, when the mold is assembled onto the heating platform, its inner top surface is in close contact with the top surface of the heating platform, and its inner height is less than the height of the heating platform.

[0013] Furthermore, mold one and mold two are integrally molded from a rigid, high-temperature resistant silicone material.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: the ring structure of the mold is directly fitted onto the heating platform to form a physical limit. The operator only needs to put the sample into the positioning hole to achieve precise positioning without repeated adjustment of the position, which significantly shortens the sample preparation time. The top positioning hole formed by splicing the first mold and the second mold forcibly constrains the placement position of the sample to be tested (such as asphalt disc), ensuring that its center point is strictly aligned with the center of the heating platform, which fundamentally avoids the problem of prolonged experimental time and sample waste caused by manual placement deviation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the existing conical clamp.

[0016] Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0017] Figure 3 This is an exploded view of Embodiment 1 of this utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the receiving groove in Embodiment 1 of this utility model.

[0019] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model.

[0020] In the diagram: 1. Mold 1; 2. Mold 2; 3. Silicone sleeve 2; 4. Silicone sleeve 1; 5. Buckle assembly; 51. Hook; 52. Stop bar; 6. Insertion hole; 7. Insertion post; 8. Clearance platform; 9. Receiving groove; 10. Machine body; 11. Heating platform; 12. Upper conical clamp; 13. Positioning hole. Detailed Implementation

[0021] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this invention. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0022] Example 1 like Figure 1-4 As shown, this solution discloses a mold for a cone plate clamp for a dynamic shear rheometer, including mold 1, mold 2, silicone sleeve 4, and silicone sleeve 3; silicone sleeve 4 is fitted onto the bottom of mold 1, and silicone sleeve 3 is fitted onto the bottom of mold 2.

[0023] Both mold 1 and mold 2 are semi-circular structures with an L-shaped cross-section. After the mold 1 and mold 2 are spliced ​​together, a positioning hole 13 is formed at the top for positioning the sample to be tested. A buckle assembly 5 is provided at the joint where the mold 1 and mold 2 are spliced. That is, there are two buckle assemblies 5 on both sides of the joint, and the mold 1 and mold 2 are fixed together by the two buckle assemblies 5.

[0024] The snap-fit ​​assembly 5 includes a snap hook 51 and a stop strip 52. At one side of the joint, the snap hook 51 of one snap-fit ​​assembly 5 is fixed to the outer circle of the end of mold 1, and the stop strip 52 is fixed to the outer circle of the end of mold 2. When mold 1 and mold 2 are spliced, the snap hook 51 is just engaged with the stop strip 52. At the other side of the joint, the snap hook 51 and the stop strip 52 of another snap-fit ​​assembly 5 are arranged oppositely on the mold, that is, the snap hook 51 is arranged at the end of mold 2, and the stop strip 52 is arranged at the end of mold 1.

[0025] The ends of mold 1 and mold 2 are respectively provided with clearance platforms 8. When mold 1 and mold 2 are spliced ​​together, the clearance platforms 8 on mold 1 and mold 2 form a receiving groove 9 to accommodate the sides of silicone sleeve 4 and silicone sleeve 3. That is, the width of the receiving groove 9 is equal to the thickness of the side of mold 1 plus the thickness of the side of mold 2. The aforementioned structure is provided in the same way at the joints on both sides.

[0026] Both silicone sleeve 4 and silicone sleeve 3 are semi-circular groove structures, with the height of the inner edge greater than the height of the outer edge. This is mainly to reduce the friction between the outer edge of silicone sleeve 4 and the outer wall of mold 1, facilitating assembly and disassembly, saving materials, and reducing manufacturing costs. After assembly, when mold 1 and mold 2 are spliced ​​together, silicone sleeve 4 and silicone sleeve 3 are joined together, forming a smooth circumferential surface on the inner side. Silicone sleeve 4 and silicone sleeve 3 are made of high-temperature resistant silicone, such as fluorosilicone rubber (e.g., LS-63) or phenyl silicone rubber (e.g., SE4710). After assembling silicone sleeve 1 (4) and silicone sleeve 2 (3), the inner height of mold 1 (1) and the inner height of mold 2 (2) are both less than the height of heating platform 11, ensuring that when assembled onto heating platform 11, the inner top surfaces of mold 1 (1) and mold 2 (2) can be tightly attached to the top surface of heating platform 11. Silicone sleeve 1 (4) and silicone sleeve 2 (3) are used to insulate against the high temperature of heating platform 11, and at the same time have a certain degree of elasticity, which allows mold 1 (1) and mold 2 (2) to be tightly bound onto heating platform 11, ensuring the stability and accuracy of installation.

[0027] Mold 1 has two end faces with insertion holes 6, and mold 2 has two end faces with insertion posts 7. The position and number of insertion posts 7 correspond to the insertion holes 6. At least one set of insertion holes 6 and insertion posts 7 is provided. When mold 1 and mold 2 are assembled, the insertion posts 7 are inserted into the corresponding insertion holes 6. The insertion posts 7 and insertion holes 6 are mainly used for positioning so that the ends of mold 1 and mold 2 are joined together tightly to ensure that the inner circumferential surface formed after mold 1 and mold 2 are joined is flat.

[0028] In use, attach silicone sleeve 4 to mold 1 and silicone sleeve 3 to mold 2. After they are in place, place one half of the mold on one side of the heating platform 11 and the other half on the other side. Move the two halves of the mold towards each other, insert the insertion post 7 into the insertion hole 6, and then snap the buckle components 5 on both sides together. Mold 1 and mold 2 are then joined together, as are silicone sleeve 4 and silicone sleeve 3, forming a cylinder on the heating platform 11. The inner top surface is in close contact with the top surface of the heating platform 11. Place the prepared circular sample to be tested into the positioning hole 13 formed by the joining of mold 1 and mold 2. Open the buckle and remove the mold to ensure that the sample to be tested is placed in the center of the heating platform 11. Be careful not to touch the sample to be tested during disassembly. After placing the sample, perform subsequent operations and tests using the dynamic shear rheometer.

[0029] Example 2 The difference between this embodiment and embodiment one is that silicone sleeve one 4 and silicone sleeve two 3 are removed in this embodiment. Correspondingly, the ends of mold one 1 and mold two 2 are not provided with clearance platform 8. At the same time, mold one 1 and mold two 2 are made of hard high temperature resistant silicone material, which can also achieve the effects of high temperature resistance, anti-adhesion of asphalt and precise installation. Compared with embodiment two, embodiment one can extend the service life of the mold by replacing silicone sleeve one 4 and silicone sleeve two 3.

[0030] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the technical solution of this utility model, and are not intended to limit the specific implementation of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A mold for a cone-plate clamping fixture in a dynamic shear rheometer, characterized in that: It includes mold one (1) and mold two (2), both of which are semi-circular structures with L-shaped cross sections; after the mold one (1) and mold two (2) are spliced ​​together, a positioning hole (13) for positioning the sample to be tested is formed at the top, and an annular structure adapted to the heating platform (11) of the cone plate clamp is formed at the bottom. The axis of the positioning hole (13) coincides with the axis of the annular structure formed after splicing; a buckle assembly (5) is provided at the joint of the mold one (1) and mold two (2), and the mold one (1) and mold two (2) are fixedly connected by the buckle assembly.

2. The mold for the cone plate clamp of a dynamic shear rheometer according to claim 1, characterized in that: The buckle assembly (5) includes a hook (51) and a stop strip (52); two sets of buckle assemblies (5) are symmetrically arranged at the joints on both sides, wherein the hook (51) on one side is fixed to the outer circle of the end of mold one (1), and the stop strip (52) is fixed to the outer circle of the end of mold two (2); the hook (51) on the other side is fixed to the outer circle of the end of mold two (2), and the stop strip (52) is fixed to the outer circle of the end of mold one (1).

3. The mold for the cone plate clamp of a dynamic shear rheometer according to claim 1, characterized in that: The ends of mold one (1) and mold two (2) are respectively provided with clearance platforms (8), and after splicing, the clearance platforms (8) on both sides form a receiving groove (9).

4. The mold for the cone plate fixture of a dynamic shear rheometer according to claim 3, characterized in that: It also includes a first silicone sleeve (4) fitted to the bottom of mold one (1) and a second silicone sleeve (3) fitted to the bottom of mold two (2); the first silicone sleeve (4) and the second silicone sleeve (3) are both semi-circular groove structures, and after splicing, the inner side forms a smooth circumferential surface, and the side is accommodated in the receiving groove (9).

5. The mold for the cone plate fixture of a dynamic shear rheometer according to claim 4, characterized in that: The height of the inner side edge of the first silicone sleeve (4) and the second silicone sleeve (3) is greater than the height of the outer side edge, and they are made of high temperature resistant silicone material.

6. The mold for the cone plate clamp of a dynamic shear rheometer according to claim 1, characterized in that: The mold one (1) has a plug hole (6) on its end face, and the mold two (2) has a plug post (7) that is compatible with the plug hole (6) on its end face; when splicing, the plug post (7) is inserted into the plug hole (6) to achieve end positioning.

7. The mold for a cone-plate clamping fixture for a dynamic shear rheometer according to any one of claims 1-6, characterized in that: When the mold is assembled onto the heating platform (11), its inner top surface is in close contact with the top surface of the heating platform (11), and its inner height is less than the height of the heating platform (11).

8. The mold for the cone plate clamp of a dynamic shear rheometer according to claim 1, characterized in that: The mold one (1) and mold two (2) are integrally molded from hard, high-temperature resistant silicone material.

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