Plastic melting point tester

Abstract

The utility model relates to the technical field of melting point testers, in particular to a plastic melting point tester which comprises a melting point tester, and an oil bath cup, a clamping block and a magnifying glass are arranged at the top of the melting point tester; the clamping mechanism comprises through holes which are annularly distributed and formed in the top ends of the clamping blocks, two silica gel blocks are arranged on the inner walls of the through holes, springs and elastic sleeves are fixedly connected to the ends of the silica gel blocks, the surfaces of the springs are located in the elastic sleeves, and circular holes which are annularly distributed are formed in the inner walls of the clamping blocks; according to the device, through the spring and the elastic sleeve, the two silica gel blocks are close to each other, abut against the surface of the capillary tube and position the capillary tube, then the capillary tube is rapidly positioned in the clamping block, and compared with an existing mode that the clamping force for the capillary tubes is not uniform, the clamping force for the capillary tubes is uniform, and the clamping efficiency is improved. And therefore, the clamping blocks can stably clamp a plurality of capillary tubes.

Description

Technical Field

[0001] This utility model relates to the field of melting point measuring instruments, and in particular to a plastic melting point measuring instrument. Background Technology

[0002] A plastic melting point apparatus is a specialized instrument used to determine the melting point of plastic materials. It applies heat to the plastic sample through a heating system, gradually increasing the sample's temperature, while simultaneously recording and displaying the temperature change curve using an observation system. The melting point of the plastic is determined by monitoring this temperature change.

[0003] According to the search, the Chinese patent "A melting point measuring device" authorized announcement number "CN220626250U" allows multiple capillary tubes to be installed during the measurement experiment through the insertion holes set on the soft pad, enabling multiple groups to be sampled simultaneously. Furthermore, the capillary tubes can be clamped and fixed by moving the clamping block by rotating the adjusting bolt.

[0004] In the aforementioned application, because the clamping block abuts against one side of the surface of the clamping pad, the capillary clamping force is greater near the clamping block and less far from the clamping block, which in turn affects the clamping effect of the pad on the capillary.

[0005] Therefore, a plastic melting point tester is proposed to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a plastic melting point tester to solve the above-mentioned problems and improve the problem of uneven clamping force on multiple capillary tubes.

[0007] This utility model achieves the above-mentioned objective through the following technical solution: a plastic melting point tester, comprising: a melting point tester, the top of which is provided with an oil bath cup, a clamping block, and a magnifying glass; a clamping mechanism, the clamping mechanism including annularly distributed through holes at the top of the clamping block, two silicone blocks being provided on the inner wall of the through holes, a spring and an elastic sleeve being fixedly connected to the end of each silicone block, the surface of the spring being located inside the elastic sleeve, and annularly distributed circular holes being provided on the inner wall of the clamping block, the circular holes communicating with the through holes, and the other ends of the spring and the elastic sleeve being fixedly connected to the inner wall of the circular holes. Through the spring and the elastic sleeve, the two silicone blocks are brought close together and pressed against the surface of the capillary tubes for positioning, ensuring the uniformity of the clamping force on multiple capillary tubes, thereby ensuring the stable clamping of multiple capillary tubes by the clamping block.

[0008] Preferably, a driven block is fixedly connected to the surface of the silicone block, and both the surfaces of the silicone block and the driven block are slidably connected to the inner wall of the circular hole. The driven block allows the two silicone blocks to move away from the capillary tube, simplifying the release of the capillary tube from its clamping position.

[0009] Preferably, a ring-shaped limiting block is fixedly connected to the top of the clamping block, and a slider is slidably connected to the upper surface of the driven block. The limiting block and the slider limit the movement of the driven block, thereby limiting the position of the silicone block.

[0010] Preferably, the surface of the silicone block is curved in an arc shape.

[0011] Preferably, a sliding rod is fixedly connected to the bottom end of the magnifying glass, and a fixing frame is fixedly connected to the top of the melting point tester, with the surface of the sliding rod slidably connected to the inner wall of the fixing frame.

[0012] Preferably, the slide rod has evenly spaced anti-slip holes on its surface, and an anti-slip rod is slidably connected to the inner wall of the fixing frame. The surface of the anti-slip rod is engaged with the inner wall of one of the anti-slip holes. The fixing frame and slide rod allow for adjustment of the magnifying glass height, while the anti-slip rod and anti-slip holes lock the slide rod in place, ensuring stability of the magnifying glass after adjustment.

[0013] Preferably, a stop is fixedly connected to the bottom end of the slide rod, and the diameter of the slide rod is smaller than the diameter of the stop. The stop limits the movement range of the slide rod, preventing the magnifying glass from dislodging from the mounting bracket during upward movement.

[0014] The beneficial effects of this utility model are:

[0015] 1. By using a spring and an elastic sleeve, two silicone blocks are brought close to each other and pressed against the surface of the capillary to position it, thereby enabling the capillary to be quickly positioned in the clamping block. Compared with the existing method that results in uneven clamping force on multiple capillary tubes, this method ensures the uniformity of clamping force on multiple capillary tubes, thereby ensuring the stable clamping of multiple capillary tubes by the clamping block.

[0016] 2. By using the driven block, the two silicone blocks are moved away from each other from the capillary tube, making the operation of releasing the capillary tube simple. By using the limiting block and the slider, the movement of the driven block is limited, thereby limiting the position of the silicone block. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the clamping mechanism of this utility model;

[0019] Figure 3 This is a cross-sectional view of the clamping block of this utility model;

[0020] Figure 4 for Figure 3 A magnified view of A in the middle.

[0021] In the diagram: 1. Melting point tester; 2. Oil bath cup; 3. Clamping block; 4. Magnifying glass; 5. Clamping mechanism; 51. Through hole; 52. Silicone block; 53. Round hole; 54. Spring; 55. Elastic sleeve; 56. Driven block; 57. Slider; 58. Limiting block; 59. Slide rod; 510. Fixing frame; 511. Anti-slip hole; 512. Anti-slip rod; 513. Stop block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In practical implementation: such as Figure 1-4 As shown, a plastic melting point tester includes: a melting point tester 1, with an oil bath cup 2, a clamping block 3, and a magnifying glass 4 on the top of the melting point tester 1; a clamping mechanism 5, which includes through holes 51 arranged in an annular pattern at the top of the clamping block 3, two silicone blocks 52 arranged on the inner wall of the through holes 51, and a spring 54 and an elastic sleeve 55 fixedly connected to the end of the silicone blocks 52. The surface of the spring 54 is located inside the elastic sleeve 55. The inner wall of the clamping block 3 has annularly arranged circular holes 53 that communicate with the through holes 51. The other ends of the spring 54 and the elastic sleeve 55 are fixedly connected to the inner wall of the circular holes 53. The surface of the silicone blocks 52 is curved into an arc shape.

[0024] The melting point tester 1 includes a measuring instrument, a fixed rod, and a heating base. The bottom ends of the heating base and the fixed rod are both fixedly connected to the top of the measuring instrument. The inner walls of the oil bath cup 2 and the clamping block 3 are both fixedly connected to the surface of the fixed rod. The measuring instrument and the heating base are all devices with relatively mature existing technology. Specific models can be selected according to actual needs, and will not be elaborated here.

[0025] When determining the melting point of plastic, equal amounts of plastic material are placed in multiple capillary tubes. The capillary tubes are then inserted into the oil bath cup 2 through the through-hole 51. At this point, the restriction on the silicone block 52 is released. The elastic force of the spring 54 and the elastic sleeve 55 pushes the silicone block 52, whose surface is curved into an arc shape, to move. This causes the two silicone blocks 52 to move closer together and evenly clamp the capillary tubes. Through the above operation, several other capillary tubes are sequentially placed into the through-hole 51 and clamped, so that multiple capillary tubes are stably installed in the oil bath cup 2. At this time, the power switch on the measuring instrument is turned on, and the numerical control on the measuring instrument is operated. The screen allows the heating base to heat the plastic material inside the capillary. The oil bath cup 2 and the magnifying glass 4 observe the reaction of the plastic material inside the capillary. The measuring instrument gradually increases the temperature of the plastic material. At this time, the observation system on the measuring instrument records and displays the temperature change curve of the plastic material. When the plastic material begins to melt, the measuring instrument records the temperature at this time as the initial melting point. As the temperature continues to rise, the temperature at which the plastic material completely melts is recorded as the final melting point. Based on the data recorded by the measuring instrument, the average melting point of the plastic material is calculated for the testing personnel to observe and record.

[0026] like Figure 4 As shown, a driven block 56 is fixedly connected to the surface of the silicone block 52. The surfaces of both the silicone block 52 and the driven block 56 are slidably connected to the inner wall of the circular hole 53. A ring-shaped limiting block 58 is fixedly connected to the top of the clamping block 3. A slider 57 is slidably connected to the upper surface of the driven block 56. The spring 54 is a cobalt-based alloy component, and the elastic sleeve 55 and the silicone block 52 are both high-temperature resistant silicone components.

[0027] In the initial state, the side of slider 57 abuts against the side of limiting block 58, causing the two silicone blocks 52 to move away from each other. Sliding slider 57 is pulled to move laterally within driven block 56, causing the side of slider 57 to move away from the side of limiting block 58, thereby releasing the restriction on spring 54 and elastic sleeve 55. At this time, the elastic force of spring 54 and elastic sleeve 55 pushes silicone block 52 to move, causing the two silicone blocks 52 to approach each other and abut against the capillary surface.

[0028] like Figure 2 As shown, a slide rod 59 is fixedly connected to the bottom of the magnifying glass 4, and a fixing frame 510 is fixedly connected to the top of the melting point tester 1. The surface of the slide rod 59 is slidably connected to the inner wall of the fixing frame 510. Anti-shifting holes 511 are evenly distributed on the surface of the slide rod 59. An anti-shifting rod 512 is slidably connected to the inner wall of the fixing frame 510. The surface of the anti-shifting rod 512 is engaged with the inner wall of one of the anti-shifting holes 511. A stop block 513 is fixedly connected to the bottom of the slide rod 59. The diameter of the slide rod 59 is smaller than the diameter of the stop block 513.

[0029] When the observation height of the magnifying glass 4 needs to be adjusted, pull the anti-shift rod 512 away from the corresponding anti-shift hole 511, thereby releasing the lock on the slide rod 59. At this time, push the stop block 513 to move it up to a suitable height. After the stop block 513 moves up to a suitable height, it will cause the slide rod 59 and the magnifying glass 4 to move up to a suitable height. Then push the anti-shift rod 512 to move it within the fixing frame 510 and engage it with the corresponding anti-shift hole 511, thus locking the slide rod 59 within the fixing frame 510.

[0030] In use, the capillary tube is inserted into the oil bath cup 2 through the through hole 51. The slider 57 is pulled to move laterally within the driven block 56, so that the side of the slider 57 moves away from the side of the limiting block 58, thereby releasing the restriction on the spring 54 and the elastic sleeve 55. At this time, the elastic force of the spring 54 and the elastic sleeve 55 pushes the silicone block 52 to move, so that the two silicone blocks 52 move closer to each other and evenly clamp the capillary tube. Through the above operation, several other capillary tubes are placed into the through hole 51 and clamped, so that multiple capillary tubes are stably installed in the oil bath cup 2.

[0031] It should be noted that the melting point tester 1, oil bath cup 2, clamp block 3 and magnifying glass 4 mentioned above are all devices with relatively mature existing technology. The specific models can be selected according to actual needs. At the same time, the melting point tester 1 can be powered by the built-in power supply or by the mains power. The specific power supply method can be selected according to the situation, which will not be elaborated here.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A plastic melting point tester, characterized in that, include: Melting point tester (1), the top of the melting point tester (1) is provided with an oil bath cup (2), a clamping block (3) and a magnifying glass (4); The clamping mechanism (5) includes a through hole (51) arranged in an annular pattern at the top of the clamping block (3). The inner wall of the through hole (51) is provided with two silicone blocks (52). The ends of the silicone blocks (52) are fixedly connected to a spring (54) and an elastic sleeve (55). The surface of the spring (54) is located inside the elastic sleeve (55). The inner wall of the clamping block (3) is provided with an annularly arranged circular hole (53). The circular hole (53) is connected to the through hole (51). The other ends of the spring (54) and the elastic sleeve (55) are fixedly connected to the inner wall of the circular hole (53).

2. The plastic melting point tester according to claim 1, characterized in that: A driven block (56) is fixedly connected to the surface of the silicone block (52), and the surfaces of the silicone block (52) and the driven block (56) are slidably connected to the inner wall of the circular hole (53).

3. The plastic melting point tester according to claim 2, characterized in that: The top of the clamping block (3) is fixedly connected to a ring-shaped limiting block (58), and the upper surface of the driven block (56) is slidably connected to a slider (57).

4. The plastic melting point tester according to claim 1, characterized in that: The surface of the silicone block (52) is curved into an arc shape.

5. A plastic melting point tester according to claim 1, characterized in that: The bottom end of the magnifying glass (4) is fixedly connected to a slide rod (59), and the top of the melting point tester (1) is fixedly connected to a fixing frame (510). The surface of the slide rod (59) is slidably connected to the inner wall of the fixing frame (510).

6. A plastic melting point tester according to claim 5, characterized in that: The slide bar (59) has anti-slip holes (511) evenly distributed on its surface, and the inner wall of the fixing frame (510) is slidably connected to an anti-slip rod (512), the surface of which is engaged with the inner wall of one of the anti-slip holes (511).

7. A plastic melting point tester according to claim 5, characterized in that: The bottom end of the slide rod (59) is fixedly connected to a stop block (513), and the diameter of the slide rod (59) is smaller than the diameter of the stop block (513).

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