A device for testing the hardness of thermoplastic materials

Abstract

This utility model discloses a hardness testing device for thermoplastic materials, including a testing body, an indenter at the top of the testing body, a placement seat at the bottom of the testing body, a retaining ring at the top of the placement seat, a protective pad in the middle of the placement seat, a through groove in the middle of the protective pad, a compression cover fitted around the indenter and the retaining ring, a protective adjustment member on the upper inner side of the compression cover, the indenter and the protective adjustment member penetrating longitudinally for circumferential protection of the material, a through groove at the lower end of the compression cover, and an entry groove on the placement seat inside the retaining ring, the entry groove penetrating the compression cover and the placement seat for stable fitting of the compression cover, the compression cover fitting between the retaining ring and the protective pad. This hardness testing device has a protective structure to prevent the tested material from shifting and splashing.

Description

Technical Field

[0001] This utility model relates to a hardness testing device, and more particularly to a hardness testing device for thermoplastic materials. Background Technology

[0002] Thermoplastic materials are a class of polymeric materials that exhibit reversible softening and hardening properties within a certain temperature range. Their molecular structure is primarily composed of linear or branched polymers. When heated, they soften and melt into a fluid state, allowing them to be molded into shapes; upon cooling, they harden and fix their shape, and can soften again upon reheating. This process can be repeated multiple times while the chemical structure remains essentially unchanged. During the production of thermoplastic materials, hardness testing devices are used to ensure the quality of the produced products, employing hydraulic or impact methods to test the material's hardness properties.

[0003] Currently, most material hardness testing devices use a grooved plate to hold the material. A hydraulic cylinder applies downward pressure, pressing an indenter against the material surface, and the hardness is determined based on the depth or area of ​​the indentation. However, when testing thermoplastic materials, this type of device can cause elastic and tough materials to be deflected by the hydraulic pressure, while brittle materials can splash outwards, posing a hazard to personnel. Therefore, it is necessary to design a hardness testing device with a protective structure to prevent material displacement and splashing. Utility Model Content

[0004] In view of the above-mentioned problems existing in the prior art, the purpose of this utility model is to provide a hardness testing device for thermoplastic materials, which realizes the protective treatment of materials by the hardness testing device to prevent the detection material from shifting and splashing.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A hardness testing device for thermoplastic materials includes a testing body, an indenter at the top of the testing body, a placement seat at the bottom of the testing body, a retaining ring at the top of the placement seat, a protective pad in the middle of the placement seat, an insertion groove in the middle of the protective pad, an extrusion cover fitted around the indenter and fitted with the retaining ring, a protective adjustment member on the upper inner side of the extrusion cover, and the indenter and the protective adjustment member penetrating longitudinally for protective treatment of the material's periphery.

[0007] Preferably, the lower end of the extrusion cover has a through groove, and the placement seat has an entry groove located inside the retaining ring. The entry groove is used to connect the extrusion cover and the placement seat for stable installation of the extrusion cover.

[0008] Preferably, the compression cover is fitted between the retaining ring and the protective pad.

[0009] Preferably, the protective pad is made of sponge material, and the upper opening of the insertion groove is larger than the lower opening.

[0010] Preferably, the protective adjustment component includes a drive structure disposed on the extrusion cover, the drive end of the drive structure is provided with a drive disk, the drive disk is rotatably disposed in the extrusion cover, a plurality of push rods are slidably disposed on the periphery of the drive disk, the lower end of the push rod is provided with a push seat, and the end of the push seat is vertically provided with a limit plate.

[0011] Preferably, the driving structure includes an electric push rod disposed on the outside of the extrusion shroud, the telescopic end of the electric push rod being rotatably connected to the driving disk, and the extrusion shroud having a driving groove through which the hinged seat passes.

[0012] Preferably, the drive disk has a sliding groove through which the push rod passes. The sliding groove has an arc-shaped groove structure, and multiple sliding grooves are distributed in a ring on the drive disk.

[0013] Preferably, the plurality of limiting plates are perpendicular to the drive disk, and an elastic sleeve is provided between adjacent limiting plates. The elastic sleeve is made of elastic material and is used for protection of the upper side of the material.

[0014] Compared with existing technologies, the thermoplastic material hardness testing device provided by this utility model has a protective structure to prevent the test material from shifting and splashing. Specifically, when the testing device presses down on the material for testing, the extrusion cover can be fitted into the retaining ring to create a sealed space outside the material. Then, the protective adjustment component is used to press against the protective pad 4 to reduce the ejection space of the splashed material, thus protecting the periphery of the material. The protective pad is also used for collection and noise reduction, increasing the safety of hardness testing of thermoplastic materials.

[0015] Furthermore, the drive structure in the protective adjustment component can drive the drive disc to rotate, adjusting the distance between multiple limit plates. This allows materials of different sizes to enter the middle of the multiple limit plates, limiting the material position, preventing material deviation, and providing protection for the upper side of the material. By pressing the material with the extension and retraction of the pressure head, the hardness of the material can be accurately detected, improving the material's protective strength, increasing the safety of hardness testing, and providing favorable conditions for the stable use of the hardness testing device.

[0016] It should be understood that the general descriptions and details herein are exemplary and illustrative only and are not intended to limit this disclosure.

[0017] This application provides an overview of various implementations or exemplary embodiments of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the thermoplastic material hardness testing device of this utility model;

[0019] Figure 2 This is a partial structural diagram of the placement seat and retaining ring in the thermoplastic material hardness testing device of this utility model;

[0020] Figure 3 This is a partial structural diagram of the retaining ring, protective pad, and extrusion cover in the thermoplastic material hardness testing device of this utility model.

[0021] Figure 4 This is a schematic diagram of the indenter and protective adjustment component in the thermoplastic material hardness testing device of this utility model;

[0022] Figure 5 This is an exploded view of the indenter and protective adjustment components in the thermoplastic material hardness testing device of this utility model.

[0023] Key reference numerals:

[0024] 1. Detection body; 2. Placement seat; 3. Retaining ring; 4. Protective pad; 5. Insertion groove; 6. Extrusion cover; 7. Through groove; 8. Entry groove; 9. Protective adjustment component; 10. Drive structure; 11. Hinge seat; 12. Drive disc; 13. Sliding groove; 14. Push rod; 15. Push seat; 16. Limiting plate; 17. Elastic sleeve; 18. Pressure head; 19. Drive groove; 20. Electric push rod. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the embodiments of this disclosure will be described in more detail below with reference to the accompanying drawings. Note: The described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0026] As attached Figure 1 To be continued Figure 5As shown in the embodiment of this utility model, the thermoplastic material hardness testing device currently involves placing the material to be tested on the placement seat 2 during hardness testing. The hardness of the material is detected by the downward pressure of the pressure sensor in the pressure head 18 at the top of the testing body 1. To better protect the thermoplastic material being tested, a retaining ring 3 is first installed at the top of the placement seat 2, and a protective pad 4 is installed in the middle of the placement seat 2. Then, a through-hole, wider at the top and narrower at the bottom, is made in the middle of the protective pad 4. The material is placed in the groove 5, which facilitates the placement of the material and the pressing of the upper pressure head 18 into the protective pad 4. Then, a compression cover 6 is fitted over the outside of the pressure head 18. When the pressure head 18 is pressed down, the compression cover 6 can be fitted with the retaining ring 3. A protective adjustment component 9 is set on the upper side of the inside of the compression cover 6. The pressure head 18 is located in the middle of the protective adjustment component 9 and penetrates the protective adjustment component 9 longitudinally. The protective adjustment component 9 on the upper side of the inside of the compression cover 6 can limit the space of the material on the upper side (the pressure head 18 penetrates the middle of the protective adjustment component 9), prevent the material from deviating and enhance the protection strength.

[0027] It is worth noting that, in order to facilitate the sealing between the retaining ring 3 and the compression cover 6, such as Figure 3 As shown, in some embodiments, a through groove 7 can be opened at the lower end of the extrusion cover 6, and an entry groove 8 can be opened on the inner side of the retaining ring 3 on the placement seat 2. The entry groove 8 cooperates with the extrusion cover 6 to pass through the placement seat 2. When the pressure head 18 presses down to detect hardness, the extrusion cover 6 is sleeved between the retaining ring 3 and the protective pad 4. The part of the lower end of the extrusion cover 6 with the entry groove 8 can pass through the through groove 7, which increases the sleeve stability of the extrusion cover 6 and the retaining ring 3.

[0028] To protect the periphery of the material, such as Figure 2 As shown, the protective pad 4 can be used to block the material from the periphery. In some embodiments, the protective pad 4 can be made of sponge material. The upper opening of the groove 5 in the middle of the protective pad 4 is set to be larger than the lower opening to form a conical guide structure, which makes it easier for the pressure head 18 to align with the material and reduce the downward pressure resistance. When the pressure head 18 presses down, the protective adjustment member 9 enters the groove 5 and squeezes downward from the upper opening, which facilitates the downward pressure of the protective adjustment member 9, so that the protective pad 4 and the protective adjustment member 9 can protect the material at the same time.

[0029] It is worth noting that when limiting the movement of materials, such as Figure 4 and 5As shown, in some embodiments, the protective adjustment member 9 can use a telescopic drive device as the drive structure 10. The drive structure 10 can be set outside the extrusion cover 6. Then, a drive disk 12 is set at the drive end of the drive structure 10. The drive disk 12 is rotatably set in the extrusion cover 6. Through the telescopic drive of the drive structure 10, the drive disk 12 can be driven to rotate at an angle. In addition, multiple push rods 14 are slidably set on the periphery of the drive disk 12. The lower end of the push rod 14 is set with a push seat 15. When the drive disk 12 rotates, it drives the push rods 14 to slide, thereby driving the multiple push seats 15 to adjust inward or outward. Finally, a limiting plate 16 is vertically set at the end of the push seat 15. The limiting plate 16 can be used as a baffle structure to limit the upper side of the material and construct a protective space.

[0030] First, in some embodiments, the drive structure 10 can use an electric push rod 20 as the drive structure 10. The electric push rod 20 is set on the outside of the extrusion cover 6. Then, a hinge seat 11 is rotatably set at the telescopic end of the electric push rod 20. The hinge seat 11 is then rotatably connected to the drive disk 12. In order to facilitate the electric push rod 20 to push the drive disk 12, a drive groove 19 is opened on the extrusion cover 6 for the hinge seat 11 to pass through. The telescopic movement of the electric push rod 20 can drive the drive disk 12 to rotate within a certain range of angles, thereby causing the multiple push seats 15 and the limiting plate 16 to retract inward or expand outward, adjusting the protection range of the protective adjustment member 9 on the upper side of the material, and increasing the flexibility of material protection.

[0031] And, as Figure 5 As shown, a sliding groove 13 is provided on the drive disk 12 for the push rod 14 to pass through. The sliding groove 13 has an arc-shaped groove structure. Multiple sliding grooves 13 are distributed in a ring on the drive disk 12. When the drive disk 12 rotates, it can drive multiple push rods 14 in the sliding groove 13 to slide in the same direction, which facilitates the extension or expansion of multiple limiting plates 16.

[0032] Furthermore, in some embodiments, multiple limiting plates 16 are vertically arranged on the drive disk 12, and elastic sleeves 17 are provided between adjacent limiting plates 16. The elastic sleeves 17 are made of elastic material and have a certain toughness and elasticity. They adapt to the expansion and contraction of the limiting plates 16 through elastic deformation, while sealing the protective space to prevent material debris from splashing and providing comprehensive protection for the upper side of the material.

[0033] Of course, the above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A hardness testing device of thermoplastic material, comprising a detection main body (1), the top of the detection main body (1) is provided with a pressure head (18), and the bottom of the detection main body (1) is provided with a placing seat (2), characterized in that: The top of the placement seat (2) is provided with a retaining ring (3), the middle of the placement seat (2) is provided with a protective pad (4), the middle of the protective pad (4) is provided with an insertion groove (5), the outside of the pressure head (18) is provided with a compression cover (6) that fits with the retaining ring (3); the upper inside of the compression cover (6) is provided with a protective adjustment component (9), the pressure head (18) and the protective adjustment component (9) penetrate longitudinally, and are used for the protection treatment of the material periphery.

2. The durometer testing apparatus for thermoplastic materials of claim 1, wherein, The lower end of the extrusion cover (6) is provided with a through groove (7), and the placement seat (2) is provided with an entry groove (8) located inside the retaining ring (3). The entry groove (8) is used to connect the extrusion cover (6) and the placement seat (2) for the stable installation of the extrusion cover (6).

3. The durometer testing apparatus for thermoplastic materials of claim 1, wherein, The compression cover (6) is fitted between the retaining ring (3) and the protective pad (4).

4. The durometer testing apparatus for thermoplastic materials of claim 1, wherein, The protective pad (4) is made of sponge material, and the upper opening of the insertion groove (5) is larger than the lower opening.

5. The durometer testing apparatus for thermoplastic materials of claim 1, wherein, The protective adjustment component (9) includes a drive structure (10) disposed on the extrusion cover (6). The drive end of the drive structure (10) is provided with a drive disk (12). The drive disk (12) is rotatably disposed in the extrusion cover (6). Multiple push rods (14) are slidably disposed on the periphery of the drive disk (12). A push seat (15) is disposed at the lower end of the push rod (14). A limit plate (16) is vertically disposed at the end of the push seat (15).

6. The durometer testing apparatus for thermoplastic materials of claim 5, wherein, The drive structure (10) includes an electric push rod (20) disposed outside the extrusion cover (6). The telescopic end of the electric push rod (20) is rotatably provided with a hinge seat (11) rotatably connected to the drive disk (12). The extrusion cover (6) is provided with a drive groove (19) through which the hinge seat (11) passes.

7. The durometer testing apparatus for thermoplastic materials of claim 6, wherein, The drive disk (12) has a sliding groove (13) through which the push rod (14) passes. The sliding groove (13) has an arc-shaped groove structure, and multiple sliding grooves (13) are distributed in a ring on the drive disk (12).

8. The hardness testing device for thermoplastic materials as described in claim 7, characterized in that, Multiple limiting plates (16) are perpendicular to the drive disk (12), and an elastic sleeve (17) is provided between adjacent limiting plates (16). The elastic sleeve (17) is made of elastic material and is used for protection of the upper side of the material.

Images