Sample holder for thermal deformation vicat softening temperature tester

Abstract

The invention discloses a sample holder for a thermal deformation vicat softening temperature determinator, and belongs to the technical field of thermal deformation vicat softening temperature determinator testing, the sample holder comprises a sample holder main body and a span-adjustable sample support, the sample holder main body comprises a sample holder upper plate and a sample holder lower plate, the sample holder upper plate and the sample holder lower plate are connected through two stand columns, a sample support base plate is installed on the upper surface of the sample holder lower plate, two sets of different sample support pieces are arranged on the sample support base plate, and sample blocking pieces are installed at the two ends of the sample support base plate. According to the invention, three groups of sample holders are combined together; when a conventional sample test is carried out, the sample is longitudinally placed, and when a large-span test needs to be carried out, the longitudinally placed sample can be transversely placed, so that the test requirement is met; according to the sample holder, the number of parts is reduced, meanwhile, the installation time is synchronously shortened, the problems that traditional equipment is limited in span, high in cost, tedious in operation and the like are solved, and the adaptability and practicability of a testing system are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of testing of heat distortion and Vicat softening temperature testers, and particularly relates to a specimen holder for a heat distortion and Vicat softening temperature tester. Background Art

[0002] A heat distortion and Vicat softening temperature tester is a key device for evaluating the heat resistance performance of polymer materials such as plastics, rubbers, and nylons. It mainly characterizes the performance of materials under heating and loading conditions by measuring the Vicat softening point temperature (VST) and heat distortion temperature (HDT);

[0003] A heat distortion and Vicat softening temperature tester mainly consists of a specimen holder, an oil tank, a heater, a stirrer, a temperature sensor, a displacement measuring device, and a controller, etc. During the test, the specimen is placed on the specimen holder. After applying a constant load, the specimen holder and the specimen are immersed in the oil together. Subsequently, the oil in the oil tank is heated at a constant heating rate. By measuring the deformation of the specimen, when the specimen reaches the specified deformation amount, the temperature value at this time is recorded as the test result;

[0004] When this instrument is in use, a specimen holder is required to apply a constant three-point bending load to the specimen under specific heating rate conditions. The standards GB1634.3 and ISO75-3 require an adjustable span holder with a load deformation temperature span of 60 mm to 210 mm for measuring high-strength thermosetting laminates. Currently on the market, a conventional specimen holder is an independent specimen holder for each test station, and the maximum span of the specimen holder is generally 100 mm, which cannot cope with any span between 60 mm and 210 mm required by the GB1634.3 and ISO75-3 standards. And because each specimen holder is independent, it has many components, resulting in a high cost and a long installation man-hour. Based on this, a specimen holder for a heat distortion and Vicat softening temperature tester is now proposed. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art, and a specimen holder for a heat distortion and Vicat softening temperature tester is proposed.

[0006] In order to achieve the above purpose, the present invention adopts the following technical scheme:

[0007] A specimen holder for a heat distortion and Vicat softening temperature tester includes a specimen holder main body and an adjustable span specimen support. The specimen holder main body includes a specimen holder upper plate and a specimen holder lower plate. The specimen holder upper plate and the specimen holder lower plate are connected by two columns. A specimen support base plate is installed on the upper surface of the specimen holder lower plate. Two different groups of specimen support members are provided on the specimen support base plate. Specimen stoppers are installed at both ends of the specimen support base plate;

[0008] The adjustable-span specimen support includes an adjustable-span support bottom plate, an adjustable-span support assembly, and an adjustment screw.

[0009] As a preferred solution, the specimen support member includes a first specimen support and a second specimen support.

[0010] As a preferred solution, three longitudinal grooves and one transverse groove are provided on the lower plate of the specimen holder;

[0011] The main function of the three longitudinal grooves is to install the bottom plates of the specimen supports of the three specimen holders;

[0012] The one transverse groove is used to install the adjustable-span specimen support.

[0013] As a preferred solution, a groove is provided inside the adjustable-span support bottom plate, and digital scales are provided in the groove for adjusting the working span of the two end sliders. A threaded hole is provided every 10 mm in the chute for adapting sliders with different position spans.

[0014] As a preferred solution, the adjustable-span support assembly is installed inside the adjustable-span support bottom plate according to the actually required span, and the span can be adjusted by referring to the reference scale inside the adjustable-span support bottom plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The present invention is designed for the traditional specimen holder that cannot adjust the span arbitrarily from 60 mm to 210 mm. By combining three groups of specimen holders together; when performing conventional specimen tests, the specimens are placed longitudinally. When large-span tests are required, the longitudinally placed specimens can be placed transversely, so as to meet the test requirements; the specimen holder of the above solution reduces the number of parts and simultaneously reduces the installation man-hours.

[0017] 2. Expand the span adjustment range: An adjustable-span design is adopted, and the span can be adjusted steplessly between 60 mm and 210 mm, meeting the requirements of GB1634.3 and ISO75-3 standards for large-span tests of high-strength materials, covering test scenarios that cannot be achieved by traditional specimen holders (maximum 100 mm).

[0018] 3. Structural integration reduces costs: The traditional three independent specimen holder workstations are combined into an integrated main body, reducing the number of parts and redundant structures, and significantly reducing the material cost and maintenance cost.

[0019] 4. Improve the installation efficiency: Simplify the installation process. Through the detachable bottom plate and chute design (longitudinal / transverse grooves), rapid switching between the conventional test and large-span test modes is realized, and the installation man-hours are greatly shortened.

[0020] 5. Enhance compatibility and flexibility: Support vertical / horizontal specimen placement to adapt to various test requirements such as heat distortion temperature (HDT) and Vicat softening temperature (VST); The adjustable span support base plate is built-in with digital scales and threaded holes (positioning every 10 mm), ensuring accurate span adjustment and firm fixation, avoiding specimen drift, and improving test repeatability.

[0021] 6. Through innovative structure and modular design, this specimen holder achieves breakthroughs in functionality, economy, and efficiency, solves problems such as span limitations, high costs, and cumbersome operations of traditional equipment, and significantly improves the adaptability and practicality of the test system. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of a three-dimensional specimen holder for a heat distortion and Vicat softening temperature tester proposed by the present invention;

[0023] Figure 2 It is a schematic structural diagram of an adjustable span specimen support in the specimen holder for a heat distortion and Vicat softening temperature tester proposed by the present invention;

[0024] Figure 3 It is a schematic structural diagram of a specimen support base plate in the specimen holder for a heat distortion and Vicat softening temperature tester proposed by the present invention;

[0025] Figure 4 It is a schematic structural diagram of a lower plate of the specimen holder in the specimen holder for a heat distortion and Vicat softening temperature tester proposed by the present invention;

[0026] Figure 5 It is a schematic structural diagram of a specimen retainer and a specimen support in the specimen holder for a heat distortion and Vicat softening temperature tester proposed by the present invention;

[0027] Figure 6 It is a schematic structural diagram of the working state of the specimen holder for a heat distortion and Vicat softening temperature tester proposed by the present invention.

[0028] In the figure: 1. Upper plate of the specimen holder; 2. Specimen retainer; 3. First specimen support; 4. Second specimen support; 5. Lower plate of the specimen holder; 6. Adjustable span support assembly; 7. Base plate of the adjustable span support; 8. Adjusting screw; 9. Column; 10. Base plate of the specimen support. Detailed Embodiment

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example, refer to Figures 1 to 6 A specimen holder for a heat distortion Vicat softening temperature tester. This specimen holder is for a test system used to measure the Vicat softening temperature of thermoplastics and the heat distortion temperature (HDT) of fiber-reinforced and filled thermosetting plastics, as well as thermoplastics and hard rubbers. It includes a specimen holder main body and an adjustable span specimen support. The specimen holder main body includes a specimen holder upper plate 1 and a specimen holder lower plate 5. The specimen holder upper plate 1 and the specimen holder lower plate 5 are connected by two columns 9. A specimen support base plate 10 is installed on the upper surface of the specimen holder lower plate 5, and specimen stoppers 2 are installed at both ends of the specimen support base plate 10;

[0033] Two groups of different specimen support members are provided on the specimen support base plate 10. The specimen support members include a first specimen support 3 and a second specimen support 4;

[0034] When using a large-span support, it is necessary to ensure that the span is infinitely adjustable and that the specimen can be prevented from drifting off the specimen holder;

[0035] The adjustable-span specimen support includes an adjustable-span support base plate 7, an adjustable-span support assembly 6, and an adjustment screw 8. The adjustable-span support base plate 7 is internally provided with a groove, and a digital scale is arranged in the groove for adjusting the working span of the sliders at both ends. A threaded hole is provided every 10 mm in the chute for adapting sliders with different position spans. The adjustable-span support assembly 6 is installed in the adjustable-span support base plate 7 according to the actually required span, and the span can be adjusted with reference to the reference scale inside the adjustable-span support base plate 7.

[0036] Three longitudinal grooves and one transverse groove are provided on the lower plate 5 of the specimen holder; the main function of the three longitudinal grooves is to install three specimen holder specimen support base plates 10; the one transverse groove is used to install the adjustable-span specimen support.

[0037] At this time, ordinary heat distortion or Vicat tests can be carried out; when large-span tests required by GB1634.3 and ISO75-3 standards need to be carried out, the three specimen support base plates can be removed, and the adjustable-span support base plate can be installed in the transverse groove of the specimen holder; then the adjustable-span support assembly 6 is installed in the adjustable-span support base plate according to the actually required span, and the span can be adjusted with reference to the internal scale of the adjustable-span support base plate.

[0038] The present invention combines three groups of specimen holders together. When carrying out conventional specimen tests, the specimens are placed longitudinally. When large-span tests are required, the longitudinally placed specimens can be placed transversely to meet the test requirements; the specimen holder of the above solution reduces the number of parts while simultaneously reducing the installation man-hours.

[0039] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A specimen holder for a heat distortion and Vicat softening temperature tester, comprising a specimen holder main body and an adjustable span specimen support, characterized in that, The main body of the specimen holder includes an upper specimen holder plate (1) and a lower specimen holder plate (5). The upper specimen holder plate (1) and the lower specimen holder plate (5) are connected by two columns (9). A specimen support base plate (10) is installed on the upper surface of the lower specimen holder plate (5). Two different sets of specimen support members are provided on the specimen support base plate (10). Specimen stoppers (2) are installed at both ends of the specimen support base plate (10). The adjustable-span specimen support includes an adjustable-span support base plate (7), an adjustable-span support assembly (6), and an adjustment screw (8).

2. The specimen holder for a heat distortion and Vicat softening temperature tester according to claim 1, wherein The specimen support members include a first specimen support (3) and a second specimen support (4).

3. The specimen holder for a heat distortion and Vicat softening temperature tester according to claim 1, characterized in that, Three longitudinal grooves and one transverse groove are provided on the lower specimen holder plate (5). The main function of the three longitudinal grooves is to install three specimen holder specimen support base plates (10). The one transverse groove is used to install the adjustable-span specimen support.

4. The specimen holder for a heat distortion and Vicat softening temperature tester according to claim 1, characterized in that, A groove is formed inside the adjustable-span support base plate (7). Digital scales are provided in the groove for adjusting the working span of the sliders at both ends. A threaded hole is provided every 10 mm in the chute for adapting sliders with different position spans.

5. The specimen holder for a heat distortion and Vicat softening temperature tester according to claim 4, characterized in that, The adjustable-span support assembly (6) is installed inside the adjustable-span support base plate (7) according to the required span. The span can be adjusted with reference to the reference scale inside the adjustable-span support base plate (7).

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