A clamping device for tensile strength detection of plastic products

Abstract

The utility model relates to a kind of clamping devices for the tensile strength detection of plastic products, it includes bottom plate, the upper surface of bottom plate is rotatably installed with stand, the two sides of stand outer surface are all set with first sliding slot along vertical direction, first sliding slot is slidably installed with first sliding block;The two sides of bottom plate outer surface are all provided with two clamping mechanisms, and the two clamping mechanisms located in the same side are oppositely arranged, and the two clamping mechanisms located in lower side are fixedly connected with stand, the two clamping mechanisms located in upside are fixedly connected with first sliding block, the upper surface of the two clamping mechanisms located in upside is all installed with hook rod;The surface of bottom plate is provided with positioning hole, the two sides of stand outer surface are all provided with the positioning mechanism that can be inserted with positioning hole Fixed, by the setting of two groups of clamping mechanisms, the strength detection and dismounting of plastic standard piece can be carried out simultaneously, so as to reduce the interruption time, improve the continuity of detection, can shorten detection cycle when large quantities of detection.

Description

Technical Field

[0001] This utility model relates to the field of strength testing technology, specifically a clamping device for testing the tensile strength of plastic products. Background Technology

[0002] In the field of materials science and engineering, plastic products, with their numerous excellent properties such as light weight, corrosion resistance, good insulation, and high plasticity, have been widely used in many industries, including automobile manufacturing, electronics, packaging, and construction. As various industries continue to raise their performance requirements for plastic products, accurately evaluating their mechanical properties, especially tensile strength, has become a crucial step in ensuring product quality, optimizing production processes, and promoting the research and development of new materials.

[0003] Chinese patent CN222733954U discloses a plastic product strength testing device. This testing device, through the setting of a cleaning and protection mechanism, avoids the need for testing personnel to manually clean the body of the stretching machine, reduces the labor intensity of testing personnel, facilitates the use of testing personnel, and improves the efficiency of testing the strength of plastic products.

[0004] When using the above-mentioned patent, the two ends of the plastic standard part are first clamped and fixed by a clamp. After the test is completed, the clamp needs to be released to remove the plastic standard part that has been tested. Then, the next plastic standard part to be tested is fixed and the tensile strength test is performed. All three steps take a certain amount of time to complete, and the test is interrupted during the operation, which reduces the continuity of the test. When conducting a large number of tests, more time will be consumed and the test cycle will be extended. Utility Model Content

[0005] The purpose of this invention is to provide a clamping device for testing the tensile strength of plastic products, which improves testing efficiency.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows.

[0007] A clamping device for testing the tensile strength of plastic products includes a base plate. A column is rotatably mounted on the upper surface of the base plate. First sliding grooves are vertically arranged on both sides of the outer surface of the column, and a first slider is slidably mounted inside the first sliding grooves. Two clamping mechanisms are provided on both sides of the outer surface of the base plate, with the two clamping mechanisms on the same side facing each other. The two clamping mechanisms on the lower side are fixedly connected to the column, and the two clamping mechanisms on the upper side are fixedly connected to the first sliders. Hook rods are mounted on the upper surfaces of the two clamping mechanisms on the upper side. Positioning holes are formed on the surface of the base plate, and positioning mechanisms that can be inserted and fixed into the positioning holes are provided on both sides of the outer surface of the column.

[0008] It is evident that by setting up two sets of clamping mechanisms, the strength testing and disassembly / removal of plastic standard parts can be carried out simultaneously, thus reducing interruption time, improving the continuity of testing, and shortening the testing cycle when conducting large-scale testing.

[0009] Furthermore, the clamping mechanism includes a connecting rod for connecting to the column or the first slider. A U-shaped plate is mounted at the end of the connecting rod, and a clamping plate is provided on the inner side of the U-shaped plate. A second groove is formed horizontally on the bottom wall of the inner side of the U-shaped plate. A second slider is slidably mounted inside the second groove, and the end of the second slider is connected to the lower surface of the clamping plate. A screw is rotatably mounted on the outer surface of the clamping plate, and the end of the screw extends through to the outer side of the U-shaped plate and is threaded to it. By turning the screw, the clamping plate can be moved horizontally, and it works in conjunction with the inner wall of the U-shaped plate to clamp the plastic standard part.

[0010] Furthermore, the positioning mechanism includes a fixing block mounted on the outer surface of the column. A rod slides vertically through the interior of the fixing block. A shoulder is provided on the outer surface of the rod, located below the fixing block. A spring is fitted on the outer surface of the rod, with both ends of the spring abutting against the shoulder and the fixing block, respectively. By inserting the rod into the positioning hole, the column can be fixed.

[0011] Furthermore, ball bearings are installed at the bottom of the insertion rod. This reduces resistance, noise, and wear during column rotation, thus extending service life.

[0012] Furthermore, an end cap is installed at the end of the screw, and an extension rod slides through the interior of the end cap. This increases the rotational torque and improves the clamping effect on standard plastic parts.

[0013] Furthermore, anti-slip teeth are provided on the outer surface of the clamping plate and on the inner wall of the opposite side of the U-shaped plate. This further improves the clamping effect on the plastic standard parts and ensures the accuracy of tensile strength testing.

[0014] Furthermore, the outer surface of the base plate is provided with multiple fixing lugs. The detachable structural design facilitates replacement or maintenance.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0016] 1. This utility model, through the setting of two sets of clamping mechanisms, allows for the assembly and disassembly of plastic standard parts on the other set of clamping mechanisms while one set is used for tensile strength testing. After the test is completed, the column can be rotated to move the fixed plastic standard part to the bottom of the testing device. The tension fixing plate hooks the hook rod to drive the upper clamping mechanism to rise, thus achieving the purpose of testing. Since the strength testing and assembly / disassembly of the plastic standard part can be carried out simultaneously, the interruption time is reduced, the continuity of testing is improved, and the testing cycle can be shortened when testing large quantities.

[0017] 2. This utility model, through the interlocking of two sets of positioning mechanisms and positioning holes, can fix the column after rotating it 180 degrees each time, thereby avoiding the situation where the angle of the column deviates during the testing process and affects the testing accuracy. Attached Figure Description

[0018] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model; Figure 2 This is the second three-dimensional structural schematic diagram of the present invention; Figure 3 for Figure 2 Enlarged diagram of A in the middle; Figure 4 This is a schematic diagram of the clamping mechanism in this utility model; Figure 5 This is a schematic diagram of the insert rod in this utility model.

[0019] In the diagram: 01, tension fixing plate; 1, base plate; 101, positioning hole; 102, fixing lug; 2, column; 201, first slide groove; 202, first slider; 203, hook rod; 3, clamping mechanism; 301, connecting rod; 302, U-shaped plate; 303, clamping plate; 304, second slide groove; 305, second slider; 306, screw; 307, end; 308, extension rod; 4, positioning mechanism; 401, fixing block; 402, insertion rod; 403, shaft shoulder; 404, spring; 405, ball bearing. Detailed Implementation

[0020] 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.

[0021] like Figure 1-5As shown, a clamping device for testing the tensile strength of plastic products includes a base plate 1. A column 2 is rotatably mounted on the upper surface of the base plate 1. First grooves 201 are vertically arranged on both sides of the outer surface of the column 2, and a first slider 202 is slidably mounted inside the first grooves 201. Two clamping mechanisms 3 are provided on both sides of the outer surface of the base plate 1, with the two clamping mechanisms 3 on the same side facing each other. The two clamping mechanisms 3 on the lower side are fixedly connected to the column 2, and the two clamping mechanisms 3 on the upper side are fixedly connected to the first slider 202. Hook rods 203 are mounted on the upper surfaces of the two clamping mechanisms 3 on the upper side. Positioning holes 101 are formed on the surface of the base plate 1, and positioning mechanisms 4 that can be inserted and fixed into the positioning holes 101 are provided on both sides of the outer surface of the column 2.

[0022] The base plate 1 is fixed on the body of the stretching machine (not shown in the figure), and when the column 2 is fixed by the clamping mechanism 3, one set of clamping mechanisms 3 faces the stretching fixing plate 01, and the other set of clamping mechanisms 3 faces the operator. Then the operator clamps and fixes the two ends of the plastic standard part by the two clamping mechanisms 3 on the same side. Then the column 2 is rotated 180 degrees and the angle is fixed by the clamping mechanism 3. At this time, the hook 203 is hooked above the stretching fixing plate 01. When the body of the stretching machine drives the stretching fixing plate 01 to rise, the upper clamping mechanism 3 can be driven to rise through the hook 203, thereby achieving the purpose of strength testing.

[0023] While one set of clamping mechanisms is used for tensile strength testing, the operator can assemble and disassemble the plastic standard parts on another set of clamping mechanisms 3. After the test is completed, the column 2 can be rotated to move the fixed plastic standard parts to the bottom of the testing device for testing. Since the strength test and assembly / disassembly of the plastic standard parts can be carried out simultaneously, the interruption time is reduced, the continuity of the test is improved, and the testing cycle can be shortened when testing a large number of products.

[0024] Preferably, the clamping mechanism 3 includes a connecting rod 301 for connecting to the column 2 or the first slider 202. A U-shaped plate 302 is mounted on the end of the connecting rod 301, and a clamping plate 303 is provided on the inner side of the U-shaped plate 302. A second sliding groove 304 is formed horizontally on the bottom wall of the inner side of the U-shaped plate 302. A second slider 305 is slidably mounted inside the second sliding groove 304, and the end of the second slider 305 is connected to the lower surface of the clamping plate 303. A screw 306 is rotatably mounted on the outer surface of the clamping plate 303, and the end of the screw 306 extends to the outer side of the U-shaped plate 302 and is threadedly connected to it.

[0025] After inserting one end of the plastic standard part between the clamping plate 303 and the inner wall of the U-shaped plate 302, the screw 306 is turned. Since the clamping plate 303 is limited by the second sliding groove 304 and the second slider 305, it can be pushed to move horizontally under the action of the threaded connection, and cooperate with the inner wall of the U-shaped plate 302 to achieve the clamping effect on the plastic standard part.

[0026] Since the second groove 304 and the second slider 305 limit the clamping plate 303, compared with the limiting method using a guide rod in the comparative patent, the finger can be prevented from hitting the guide rod during the rotation of the screw 306, thus improving the operating experience.

[0027] Preferably, the positioning mechanism 4 includes a fixing block 401 installed on the outer surface of the column 2, a rod 402 that slides vertically through the inside of the fixing block 401, a shoulder 403 provided on the outer surface of the rod 402 and below the fixing block 401, and a spring 404 sleeved on the outer surface of the rod 402, with the two ends of the spring 404 abutting against the shoulder 403 and the fixing block 401 respectively.

[0028] Pull the insertion rod 402 upward so that its end is pulled out of the positioning hole 101. At this time, the fixation of the column 2 can be released, and it can be rotated on the base plate 1. During the rotation, the end of the insertion rod 402 is pushed against the surface of the base plate 1 by the elastic force of the spring 404. When the insertion rod 402 is aligned with the positioning hole 101 after rotating 180 degrees, the compressed spring 404 releases its elastic force, thus pushing the insertion rod 402 into the positioning hole 101 for fixation.

[0029] Preferably, a ball bearing 405 is provided at the bottom of the insertion rod 402.

[0030] When the end of the insertion rod 402 slides against the surface of the base plate 1, the ball 405 rolls due to friction, thereby converting contact friction into rolling friction, which greatly reduces the resistance, noise and wear when the column 2 rotates, and improves its service life.

[0031] Preferably, the end of the screw 306 is provided with an end head 307, and an extension rod 308 slides through the interior of the end head 307.

[0032] By using the extension rod 308, the rotational torque can be increased through the lever principle, thereby improving the clamping effect on the plastic standard parts and preventing them from coming loose during tensile strength testing.

[0033] Preferably, anti-slip teeth are provided on the outer surface of the clamping plate 303 and the inner wall of the opposite side of the U-shaped plate 302.

[0034] The anti-slip teeth enhance the friction between the inner walls of the clamping plate 303 and the U-shaped plate 302 and the plastic standard parts, further improving the clamping effect on the plastic standard parts and ensuring the accuracy of tensile strength testing.

[0035] Preferably, the outer surface of the base plate 1 is provided with a plurality of fixing lugs 102.

[0036] The base plate 1 is fixedly installed on the body of the stretching machine by bolts to ensure its stability during use, and the detachable structural design facilitates replacement or maintenance.

[0037] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0038] The above is a detailed description of the present invention in conjunction with specific embodiments, and it should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, any equivalent substitutions or obvious modifications made without departing from the concept of the present invention, and which have the same performance or use, should be considered as falling within the patent protection scope defined by the submitted claims.

Claims

1. A clamping device for testing the tensile strength of plastic products, comprising a base plate (1), characterized in that: A column (2) is rotatably mounted on the upper surface of the base plate (1). A first sliding groove (201) is provided on both sides of the outer surface of the column (2) along the vertical direction. A first slider (202) is slidably mounted inside the first sliding groove (201). Two clamping mechanisms (3) are provided on both sides of the outer surface of the base plate (1), and the two clamping mechanisms (3) on the same side are arranged opposite to each other. The two clamping mechanisms (3) on the lower side are fixedly connected to the column (2), and the two clamping mechanisms (3) on the upper side are fixedly connected to the first slider (202). The upper surface of the two clamping mechanisms (3) on the upper side is equipped with hook rods (203). The base plate (1) has a positioning hole (101) on its surface, and the two sides of the outer surface of the column (2) are provided with positioning mechanisms (4) that can be inserted and fixed with the positioning hole (101).

2. The clamping device for testing the tensile strength of plastic products according to claim 1, characterized in that: The clamping mechanism (3) includes a connecting rod (301) for connecting to the column (2) or the first slider (202), and a U-shaped plate (302) is installed at the end of the connecting rod (301), and a clamping plate (303) is provided on the inner side of the U-shaped plate (302). The bottom wall of the inner side of the U-shaped plate (302) is provided with a second sliding groove (304) in the horizontal direction. A second slider (305) is slidably installed inside the second sliding groove (304), and the end of the second slider (305) is connected to the lower surface of the clamping plate (303). A screw (306) is rotatably mounted on the outer surface of the clamping plate (303), and the end of the screw (306) extends through to the outside of the U-shaped plate (302) and is threadedly connected to it.

3. The clamping device for testing the tensile strength of plastic products according to claim 1, characterized in that: The positioning mechanism (4) includes a fixing block (401) installed on the outer surface of the column (2). A rod (402) slides vertically through the inside of the fixing block (401). A shoulder (403) is provided on the outer surface of the rod (402) and below the fixing block (401). A spring (404) is sleeved on the outer surface of the rod (402). The two ends of the spring (404) abut against the shoulder (403) and the fixing block (401) respectively.

4. The clamping device for testing the tensile strength of plastic products according to claim 3, characterized in that: The bottom of the insert (402) is provided with a ball bearing (405).

5. A clamping device for testing the tensile strength of plastic products according to claim 2, characterized in that: The end of the screw (306) is equipped with an end cap (307), and an extension rod (308) slides through the interior of the end cap (307).

6. A clamping device for testing the tensile strength of plastic products according to claim 2, characterized in that: Anti-slip teeth are provided on the outer surface of the clamping plate (303) and on the inner wall of the opposite side of the U-shaped plate (302).

7. A clamping device for testing the tensile strength of plastic products according to claim 1, characterized in that: The outer surface of the base plate (1) is provided with a plurality of fixing lugs (102).

Images