A device for detecting the hardness of a plastic product

Abstract

The utility model relates to a kind of for plastic product hardness detection device, it includes machine body, the surface of machine body is provided with U-shaped groove, the bottom wall of U-shaped groove is installed with bearing seat by lifting column, the upper surface of bearing seat is provided with rectangular frame, and the inside of rectangular frame is installed with pressing plate by clamping mechanism;The surface of bearing seat is evenly distributed with positioning hole, the lower surface of rectangular frame is provided with multiple positioning pins, and multiple positioning pins can be inserted in different positioning hole simultaneously.By clamping mechanism pushing pressing plate, plastic product is clamped in bearing seat, then the positioning pin at the bottom of bearing seat is inserted in positioning hole, using the limiting effect of positioning pin in the inner wall of positioning hole, the positioning of rectangular frame is realized, it can ensure that the edge of plastic product is detected to avoid the situation of warping, so that it can avoid the distortion of detection result, improve the reliability of data.

Description

Technical Field

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

[0002] Plastic products are widely used in the automotive, electronics, packaging, and construction industries due to their lightweight, corrosion resistance, and ease of processing. With advancements in materials science, the performance requirements for plastic products are constantly increasing. Hardness, as a key indicator for measuring wear resistance, impact resistance, and structural stability, directly affects the product's lifespan and application scenarios.

[0003] Currently, plastic hardness testing mainly relies on Shore hardness testers, which convert the depth of the indenter into the material surface under standard load into a hardness value. They have advantages such as simple operation and low cost.

[0004] Chinese patent CN213239804U discloses a hardness testing device for plastic products. The length of the connecting sleeve used to place the object to be tested on the testing device can be adjusted. By stretching the telescopic plate from the inside to the outside of the connecting sleeve, the length of the connecting sleeve is extended, which can effectively place some test objects with irregular centers of gravity on the telescopic plate. Moreover, the position of the telescopic plate can be easily adjusted, and the position adjustment of the telescopic plate inside the connecting sleeve is very convenient.

[0005] When testing the hardness of plastic products, multiple tests are required at the center and edges of the product's surface. The average value is then taken to obtain a relatively accurate hardness value. However, due to the lightweight nature of plastic products, when testing the edges with an indenter, the edges are prone to warping, leading to deviations in the indentation depth and distorted test results, thus reducing data reliability. While holding the plastic product in place can prevent warping, smaller plastic products pose a safety hazard as they could injure the hand. Utility Model Content

[0006] The purpose of this invention is to provide a device for testing the hardness of plastic products that prevents edge warping.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows.

[0008] A device for testing the hardness of plastic products includes a body with a U-shaped groove on its surface. A support seat is mounted on the bottom wall of the U-shaped groove via a lifting column. A rectangular frame is provided on the upper surface of the support seat, and a pressure plate is mounted inside the rectangular frame via a clamping mechanism. Positioning holes are evenly distributed on the surface of the support seat, and multiple positioning pins are provided on the lower surface of the rectangular frame, with the multiple positioning pins capable of being inserted into different positioning holes simultaneously.

[0009] Therefore, by using a clamping mechanism to push the pressure plate to clamp the plastic product into the carrier, and then inserting the positioning pin at the bottom of the carrier into the positioning hole, the positioning of the rectangular frame is achieved by using the limiting effect of the positioning pin on the inner wall of the positioning hole. This ensures that the edge of the plastic product is not warped when it is inspected, thereby avoiding the distortion of the inspection results and improving the reliability of the data.

[0010] Furthermore, the clamping mechanism includes a screw hole formed on the rectangular frame, with a screw threaded inside the screw hole. One end of the screw is rotatably connected to the outer surface of the pressure plate, and a knob is installed at the other end of the screw. When the screw rotates, the pressure plate can move back and forth under the action of the threaded connection to clamp and position the plastic product.

[0011] Furthermore, the top wall of the U-shaped groove is equipped with pressure needles, and the outer surface of the machine body is equipped with a touch screen. The pressure needles apply downward pressure to the plastic product to be tested, achieving the purpose of hardness testing. The test results are displayed on the touch screen for a more intuitive display.

[0012] Furthermore, a ring-shaped lamp holder is installed on the top wall of the U-shaped groove with the pressure needle as the center, and multiple laser beads are arranged coaxially and at equal angles on the lower surface of the ring-shaped lamp holder. This enables precise positioning of the monitoring point and reduces human error.

[0013] Furthermore, two guide posts are symmetrically mounted on the outer surface of the pressure plate, and two through holes are symmetrically opened on the rectangular frame, with the guide posts slidably positioned inside the through holes. This allows the pressure plate to overcome its own rotation and move horizontally, clamping and fixing the plastic product.

[0014] Furthermore, the bottom of the locating pin has a constricted section, allowing it to be inserted more easily into the locating hole.

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

[0016] 1. This utility model uses a clamping mechanism to push a pressure plate to clamp the plastic product into the carrier. Then, the positioning pin at the bottom of the carrier is inserted into the positioning hole. The positioning pin is positioned by the limiting effect of the inner wall of the positioning hole. This ensures that the edge of the plastic product is not warped when it is inspected, thereby avoiding the distortion of the test results and improving the reliability of the data. Moreover, only the plastic product needs to be fixed once. Subsequently, the positioning pin can be inserted into different positioning holes to position the plastic product in different positions. The operation is simple and the use is flexible.

[0017] 2. This utility model uses multiple laser beads to emit infrared lasers that are vertically projected onto the surface of plastic products. The multiple projection points are distributed in a circle, and the center of the circle is the test point of the pressure needle, which can accurately locate the monitoring point and reduce human error. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the bearing seat in this utility model; Figure 3 This is a schematic diagram of the rectangular frame in this utility model; Figure 4 This is a partial structural diagram of the body in this utility model.

[0019] In the diagram: 1. Body; 101. Pressure pin; 102. Touch screen; 103. U-shaped groove; 104. Annular lamp holder; 105. Laser lamp bead; 2. Lifting column; 201. Bearing seat; 202. Rectangular frame; 203. Pressure plate; 204. Positioning hole; 205. Positioning pin; 2051. Narrowing part; 3. Clamping mechanism; 301. Screw hole; 302. Screw; 303. Knob; 4. Guide post; 401. Through hole. 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 1-4 As shown, a device for testing the hardness of plastic products includes a body 1. A U-shaped groove 103 is provided on the surface of the body 1. A support seat 201 is mounted on the bottom wall of the U-shaped groove 103 via a lifting column 2. A rectangular frame 202 is provided on the upper surface of the support seat 201. A pressure plate 203 is mounted inside the rectangular frame 202 via a clamping mechanism 3. Positioning holes 204 are evenly distributed on the surface of the support seat 201. Multiple positioning pins 205 are provided on the lower surface of the rectangular frame 202, and these positioning pins 205 can be simultaneously inserted into different positioning holes 204.

[0022] The plastic product to be tested is placed inside the rectangular frame 202. Then, the clamping mechanism 3 drives the pressure plate 203 to move, so that it cooperates with the inner wall of the other side of the rectangular frame 202 to clamp the plastic product and fix it inside the rectangular frame 202. Next, multiple positioning pins 205 at the bottom of the rectangular frame 202 are inserted into different positioning holes 204. There can be four positioning pins 205, which are distributed at the four corners of the bottom of the rectangular frame 202. The positioning pins 205 are positioned by the limiting effect of the inner wall of the positioning hole 204, so as to achieve the positioning of the rectangular frame 202 and ensure the stability of the plastic product during the testing process. Moreover, by simply inserting the positioning pins 205 into different positioning holes 204, the plastic product can be positioned at different positions on the surface of the support 201. The operation is simple and flexible. It ensures that when testing the edges, the edges will not warp due to local stress, thereby avoiding the distortion of the test results and improving the reliability of the data.

[0023] Preferably, the clamping mechanism 3 includes a screw hole 301 formed on the rectangular frame 202, a screw 302 is installed in the internal thread of the screw hole 301, one end of the screw 302 is rotatably connected to the outer surface of the pressure plate 203, and a knob 303 is installed at the other end of the screw 302.

[0024] By turning the knob 303, the screw 302 is rotated. Under the action of the threaded connection, the screw 302 can extend and retract back and forth. Since the screw 302 and the pressure plate 203 are rotatably connected, the pressure plate 203 can be prevented from rotating synchronously. Therefore, the purpose of clamping and positioning plastic products can be achieved by moving the pressure plate 203 back and forth.

[0025] Preferably, the top wall of the U-shaped groove 103 is provided with a pressure needle 101, and the outer surface of the body 1 is provided with a touch screen 102.

[0026] The machine body 1 is equipped with a drive device that can drive the pressure needle 101 to move vertically up and down to apply downward pressure to the plastic product to be tested, so as to achieve the purpose of hardness testing. The test value is displayed on the touch screen 102, which makes the display more intuitive.

[0027] The above is the existing technology. The instrument 1 is a table hardness testing instrument with model number ydj-01 produced by Times Test Metal (Shandong) Scientific Instruments Co., Ltd., so it will not be described in detail here.

[0028] Preferably, an annular lamp holder 104 is installed on the top wall of the U-shaped groove 103 with the pressure pin 101 as the center, and multiple laser lamp beads 105 are arranged coaxially and at equal angles on the lower surface of the annular lamp holder 104.

[0029] Infrared lasers emitted by multiple laser beads 105 are projected vertically onto the surface of the plastic product. The multiple projection points are distributed in a circle, and the test point of the pressure needle 101 is located at the center of the circle, which can accurately locate the monitoring point and reduce human error.

[0030] Preferably, two guide posts 4 are symmetrically installed on the outer surface of the pressure plate 203, and two through holes 401 are symmetrically opened on the rectangular frame 202, with the guide posts 4 slidably disposed inside the through holes 401.

[0031] By setting the guide post 4, the pressure plate 203 is limited, so that when the screw 302 rotates, the pressure plate 203 can overcome its own rotation and move horizontally to clamp and fix the plastic product.

[0032] Preferably, the bottom of the positioning pin 205 is provided with a constricted portion 2051.

[0033] The diameter of the bottom of the positioning pin 205 has been shortened, allowing it to be better inserted into the positioning hole 204 to provide positioning for the rectangular frame 202.

[0034] 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.

[0035] 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 device for testing the hardness of plastic products, comprising a body (1), characterized in that: The surface of the body (1) is provided with a U-shaped groove (103), and the bottom wall of the U-shaped groove (103) is provided with a support seat (201) by a lifting column (2). The upper surface of the support seat (201) is provided with a rectangular frame (202), and the inside of the rectangular frame (202) is provided with a pressure plate (203) by a clamping mechanism (3). The surface of the support base (201) is evenly distributed with positioning holes (204), and the lower surface of the rectangular frame (202) is provided with multiple positioning pins (205), and the multiple positioning pins (205) can be inserted into different positioning holes (204) at the same time.

2. The device for testing the hardness of plastic products according to claim 1, characterized in that: The clamping mechanism (3) includes a screw hole (301) opened on the rectangular frame (202), a screw (302) is installed in the internal thread of the screw hole (301), and one end of the screw (302) is rotatably connected to the outer surface of the pressure plate (203), and a knob (303) is installed at the other end of the screw (302).

3. The device for testing the hardness of plastic products according to claim 2, characterized in that: The top wall of the U-shaped groove (103) is provided with a pressure needle (101), and the outer surface of the body (1) is provided with a touch screen (102).

4. The device for testing the hardness of plastic products according to claim 3, characterized in that: The top wall of the U-shaped groove (103) is equipped with an annular lamp holder (104) with the pressure needle (101) as the center. Multiple laser lamp beads (105) are arranged coaxially and at equal angles on the lower surface of the annular lamp holder (104).

5. The device for testing the hardness of plastic products according to claim 2, characterized in that: Two guide posts (4) are symmetrically installed on the outer surface of the pressure plate (203). Two through holes (401) are symmetrically opened on the rectangular frame (202), and the guide posts (4) are slidably disposed inside the through holes (401).

6. The device for testing the hardness of plastic products according to claim 1, characterized in that: The bottom of the positioning pin (205) is provided with a constricted portion (2051).

Images