Foam defect detection device

Abstract

The utility model discloses a foam defect detection device, which belongs to the technical field of foam detection and comprises a detection box body, a plurality of upright posts are symmetrically and fixedly connected to the upper surface of the detection box body, a top plate is fixedly connected to the upper ends of the upright posts, elastic detection components are arranged on the outer surfaces of the upright posts, and strength detection components are arranged in inner cavities of the elastic detection components. A movable plate is driven to move downwards through a first hydraulic rod, pressure is applied to a foam body through a compression block, the foam body is compressed, the foam body rebounds freely after compression is completed, the height change of the foam body before and after compression is measured through a graduated scale, and therefore whether the elasticity of foam is qualified or not is detected. If the rebound height of the foam is close to or equal to the original height, the foam has good elasticity and rebound capability and has no obvious elasticity defect, and if the rebound height of the foam is far lower than the original height or the rebound is slow, the foam has the elasticity defect.

Description

Technical Field

[0001] The utility model relates to the technical field of foam detection, and more specifically to a foam defect detection device. Background Art

[0002] Foam is a porous material formed by expanding plastic particles through physical or chemical methods. This material is usually made of various types of polymers. Foam has good elasticity and can withstand compression and return to its original shape after the pressure is removed. Due to its porous structure, foam is much lighter than unfoamed plastic and can effectively absorb shock and vibration. Foam has a wide range of applications, covering almost all industries, from daily consumer products to professional uses in electronics.

[0003] Chinese Patent Authorization Publication No.: CN 212519816 U provides a microporous foam production and testing device, comprising a mechanism box, a refrigerator fixedly connected to the inner bottom wall of the mechanism box, a heat dissipation end of the refrigerator penetrating the mechanism box and extending below the mechanism box, a carrier plate provided inside the mechanism box, the left and right sides of the carrier plate fixedly connected to the inner side walls of the mechanism box, a discharge pipe fixedly connected to the output end of the refrigerator, the top end of the discharge pipe penetrating the carrier plate and extending above the carrier plate, a symmetrical operating unit fixedly connected to the upper surface of the carrier plate, and a symmetrical ventilation plate fixedly connected to the upper surface of the carrier plate. This microporous foam production and testing device accelerates the cooling rate inside the mechanism box in the testing device, avoids the problem of excessive heat causing heat damage to the operating unit and testing components inside the mechanism box, and improves the testing efficiency of the testing device, thereby enabling the testing device to better detect the impact resistance of the microporous foam.

[0004] In actual use of the existing technology, in addition to the impact resistance of foam, whether its elastic potential energy is qualified is also an important indicator for measuring the foam. Foam with insufficient elastic potential energy cannot effectively absorb and disperse energy when subjected to impact or vibration, thereby reducing the shock absorption effect and may cause damage to the protected items. Therefore, a foam defect detection device is proposed. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] In response to the problems existing in the prior art, the purpose of the present utility model is to provide a foam defect detection device, which drives the movable plate to move downward through a hydraulic rod, applies pressure to the foam body through a compression block, compresses it, and keeps the foam body in a compressed state for a certain period of time to simulate the continuous pressure that may be encountered in actual use. After the compression is completed, the foam body is allowed to rebound freely, and the height change of the foam body before and after compression is measured by a ruler to detect whether the elasticity of the foam is qualified. If the foam rebound height is close to or equal to its original height, it means that the foam has good elasticity and rebound ability and has no significant elastic defects. If the foam rebound height is much lower than its original height, or rebounds slowly, this indicates that the foam has elastic defects.

[0007] 2. Technical solution

[0008] In order to solve the above problems, the present invention adopts the following technical solutions.

[0009] A foam defect detection device comprises a detection box, wherein a plurality of columns are symmetrically fixedly connected to the upper surface of the detection box, the upper ends of the columns are fixedly connected to the top plate, the outer surfaces of the columns are provided with elastic detection components, the inner cavity of the elastic detection components is provided with a strength detection component, and the inner cavity of the detection box is provided with an ejection component; the elastic detection component comprises a hydraulic rod 1 fixedly connected to the inner cavity of the top plate, the outer surface of the column is slidably connected to a movable plate, the middle part of the lower surface of the movable plate is fixedly connected to a compression block, and the middle part of the upper surface of the detection box is fixedly connected to a detection frame; the strength detection component comprises a hydraulic rod 2 fixedly connected to the inner cavity of the movable plate, the lower end of the hydraulic rod 2 is fixedly connected to a detection head; the ejection component comprises an electric telescopic rod fixedly connected to the top of the inner cavity of the detection box, the lower end of the electric telescopic rod is fixedly connected to the ejection plate, and four ejection rods are symmetrically fixedly connected to the upper surface of the ejection plate.

[0010] Furthermore, a door is hinged on the front surface of the detection box, and a lower end of the hydraulic rod is fixedly connected to the upper surface of the movable plate.

[0011] Furthermore, the detection frame is made of a transparent material, a scale is fixedly connected to the middle of one side of the detection frame, and the scale is made of a transparent material and scale values are set on its outer surface.

[0012] Furthermore, the inner cavity of the detection frame is movably connected to a foam body, and the compression block moves in the detection frame.

[0013] Furthermore, both the movable plate and the inner cavity of the compression block are provided with limit grooves, and the detection head moves in the limit grooves.

[0014] Furthermore, the detection head includes a mounting block, and the upper surface of the mounting block is fixedly connected to the second hydraulic rod.

[0015] Furthermore, the inner cavity of the lower surface of the mounting block is provided with threads, and the inner cavity of the mounting block is connected to a screw rod via the threads.

[0016] Furthermore, a flat impact head, a hemispherical impact head and a conical impact head are fixedly connected to the lower end of the screw respectively, and the lower surface of the flat impact head is flat and is located on the same horizontal line as the lower surface of the compression block.

[0017] Furthermore, the lower surface of the hemispherical impact head is semicircular, and the lower surface of the conical impact head is evenly provided with a plurality of conical protrusions.

[0018] Furthermore, the ejector plate is I-shaped, the four ejector rods are located at the four corners of the ejector plate, the outer surface of the ejector rod is movably connected to the inner cavity of the detection box, and the upper end of the ejector rod is on the same horizontal line as the upper surface of the detection box.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] (1) This solution uses a hydraulic rod to drive the movable plate to move downward, and applies pressure to the foam body through the compression block to compress it, and keeps the foam body in a compressed state for a certain period of time to simulate the continuous pressure that may be encountered in actual use. After the compression is completed, the foam body is allowed to rebound freely, and the height change of the foam body before and after compression is measured by a ruler to detect whether the elasticity of the foam is qualified. If the foam rebound height is close to or equal to its original height, it means that the foam has good elasticity and rebound ability and has no significant elasticity defects. If the foam rebound height is much lower than its original height, or rebounds slowly, it indicates that the foam has elasticity defects.

[0022] (2) This solution uses a hydraulic rod to drive the detection head downward to impact the outer surface of the foam body. After the impact is completed, observe whether there are cracks, breaks, depressions or other forms of deformation at the impact point of the foam body. If the foam shows obvious damage or cracks under a slight impact, this may indicate that there are defects in the strength or structure of the foam. If the foam can withstand multiple or strong impacts without obvious damage, then it may have higher local strength and impact resistance. The detection head includes impact heads of different shapes such as flat impact heads, hemispherical impact heads and conical impact heads, which are used to simulate different types of impacts and test the local strength and impact resistance of the foam.

[0023] (3) This solution uses an electric telescopic rod to drive the ejection plate and the ejection rod to move upward to eject the four corners of the compressed foam body from the detection frame, making it easier for operators to take samples and preventing the foam body from being squeezed and adhering to the surface of the detection box, making it difficult to remove. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 This is a half-section schematic diagram of the internal structure of the utility model;

[0026] Figure 3 It is a schematic diagram of the local structure of the utility model;

[0027] Figure 4 This is a schematic diagram of the partial structure of the utility model;

[0028] Figure 5 For this utility model Figure 2 -A is an enlarged structural diagram.

[0029] Description of the numbers in the figure:

[0030] 1. Detection box; 101. Column; 102. Top plate; 2. Elasticity detection assembly; 201. Hydraulic rod 1; 202. Moving plate; 203. Compression block; 204. Detection frame; 205. Foam body; 206. Scale; 3. Strength detection assembly; 301. Hydraulic rod 2; 302. Limiting groove; 303. Detection head; 3031. Mounting block; 3032. Screw; 3033. Flat impact head; 3034. Hemispherical impact head; 3035. Conical impact head; 4. Ejector assembly; 401. Ejector plate; 402. Electric telescopic rod; 403. Ejector rod. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0034] Example 1:

[0035] See also Figure 1 、 Figure 2 and Figure 5 , including a detection box 1, a plurality of columns 101 are symmetrically fixedly connected to the upper surface of the detection box 1, the upper ends of the columns 101 are fixedly connected to the top plate 102, an elastic detection component 2 is provided on the outer surface of the column 101, the elastic detection component 2 includes a hydraulic rod 201 fixedly connected to the inner cavity of the top plate 102, a movable plate 202 is slidably connected to the outer surface of the column 101, a compression block 203 is fixedly connected to the middle of the lower surface of the movable plate 202, and a detection frame 204 is fixedly connected to the middle of the upper surface of the detection box 1.

[0036] Specifically, the front surface of the detection box 1 is hinged with a box door, the lower end of the hydraulic rod 201 is fixedly connected to the upper surface of the movable plate 202, the detection frame 204 is made of a transparent material, and a scale 206 is fixedly connected to the middle position of one side of the detection frame 204. The scale 206 is made of a transparent material and its outer surface is provided with scale values. The inner cavity of the detection frame 204 is movably connected to the foam body 205, and the compression block 203 moves in the detection frame 204.

[0037] Furthermore, the foam body 205 to be inspected for defects is placed in the inspection frame 204, and then the hydraulic rod 201 is started to drive the movable plate 202 to move downward. The compression block 203 applies pressure to the foam body 205 to compress it to a predetermined ratio, for example, to 50% of its original thickness. The inspection frame 204 will fix the foam body 205 to ensure that the foam body 205 does not move during the test, and keep the foam body 205 in a compressed state for a certain period of time to simulate the continuous pressure that may be encountered in actual use. After the compression is completed, the foam body 205 is allowed to rebound freely, and the height change of the foam body 205 before and after compression is measured by the scale 206 to detect whether the elasticity of the foam is qualified. If the foam rebound height is close to or equal to its original height, it means that the foam has good elasticity and rebound ability and has no significant elastic defects. If the foam rebound height is much lower than its original height, or the rebound is slow, this may indicate that the foam has elastic defects.

[0038] Example 2:

[0039] See also Figure 1 、 Figure 2 、 Figure 4 and Figure 5 This embodiment is based on the previous embodiment. The inner cavity of the elasticity detection component 2 is provided with a strength detection component 3. The strength detection component 3 includes a hydraulic rod 2 301 fixedly connected to the inner cavity of the movable plate 202. The lower end of the hydraulic rod 2 301 is fixedly connected to a detection head 303.

[0040] Specifically, the inner cavities of the movable plate 202 and the compression block 203 are both provided with a limiting groove 302, and the detection head 303 moves in the limiting groove 302. The detection head 303 includes a mounting block 3031, the upper surface of the mounting block 3031 is fixedly connected to the hydraulic rod 2 301, and the inner cavity of the lower surface of the mounting block 3031 is provided with a thread, and the inner cavity of the mounting block 3031 is connected to a screw 3032 through a thread, and the lower end of the screw 3032 is fixedly connected to a flat impact head 3033, a hemispherical impact head 3034 and a conical impact head 3035, respectively. The lower surface of the flat impact head 3033 is flat and is located on the same horizontal line as the lower surface of the compression block 203, the lower surface of the hemispherical impact head 3034 is semicircular, and the lower surface of the conical impact head 3035 is evenly provided with multiple conical protrusions.

[0041] Furthermore, the hydraulic rod 2 301 is started to drive the detection head 303 to move downward to impact the outer surface of the foam body 205. The limit groove 302 is used to guide the vertical movement of the detection head 303 to ensure that the impact direction is correct. After the impact is completed, observe whether there are cracks, fractures, depressions or other forms of deformation at the impact point of the foam body 205. The number, position and interval time of each impact are the same.

[0042] If the foam shows obvious damage or cracks under slight impact, it may indicate that there are defects in the strength or structure of the foam. If the foam can withstand multiple or strong impacts without obvious damage, then it may have higher local strength and impact resistance.

[0043] The test head 303 includes impact heads of different shapes, such as a flat impact head 3033, a hemispherical impact head 3034, and a conical impact head 3035, which are used to simulate different types of impacts. The flat impact head 3033 provides a uniform force distribution, which is suitable for testing the planar strength of the material or evaluating the behavior of the material under large-area pressure. They can be used to simulate the scenario of heavy objects being placed flat.

[0044] The hemispherical impact tip 3034 creates a wider contact area when contacting foam, making it suitable for testing the surface hardness and elasticity of materials. Hemispherical impact tips are often used to evaluate the indentation hardness of a material or its compression behavior at a certain depth.

[0045] The conical impact tip 3035 creates a smaller contact area when in contact, allowing it to penetrate deeper into the material to test the material's penetration resistance or local hardness.

[0046] The flat impact head 3033, the hemispherical impact head 3034 and the conical impact head 3035 are connected to the mounting block 3031 via a screw 3032 and can be flexibly replaced to meet different testing needs and improve the diversity of testing. During testing, the foam can be tested for strength defects separately. At the same time, the strength test can also be performed while the foam is squeezed, and the strength of the foam in the normal state and the strength in the compressed state can be tested respectively.

[0047] Example 3:

[0048] See also Figure 1 、 Figure 2 and Figure 3 This embodiment is based on the previous embodiment. The inner cavity of the detection box 1 is provided with an ejection assembly 4, including an electric telescopic rod 402 fixedly connected to the top of the inner cavity of the detection box 1, the lower end of the electric telescopic rod 402 is fixedly connected to the ejection plate 401, and four ejection rods 403 are symmetrically fixedly connected to the upper surface of the ejection plate 401.

[0049] Specifically, the ejector plate 401 is I-shaped, and four ejector rods 403 are located at the four corners of the ejector plate 401. The outer surface of the ejector rod 403 is movably connected to the inner cavity of the detection box 1, and the upper end of the ejector rod 403 is on the same horizontal line as the upper surface of the detection box 1.

[0050] Furthermore, the electric telescopic rod 402 drives the ejection plate 401 and the ejection rod 403 to move upward to eject the four corners of the compressed foam body 205 in the detection frame 204 from the detection frame, making it easier for the operator to take samples and avoiding the foam body 205 from being squeezed and adhering to the surface of the detection box 1, making it difficult to remove.

[0051] Working principle: During the use of the device, the operator places the foam body 205 that needs to be inspected for defects in the inspection frame 204, and then starts the hydraulic rod 1 201 to drive the movable plate 202 to move downward, and applies pressure to the foam body 205 through the compression block 203 to compress it. The inspection frame 204 will fix the foam body 205 to ensure that the foam body 205 does not move during the test, and keeps the foam body 205 in a compressed state for a certain period of time to simulate the continuous pressure that may be encountered in actual use. After the compression is completed, the foam body 205 is allowed to rebound freely, and the height change of the foam body 205 before and after compression is measured by the scale 206 to detect whether the elasticity of the foam is qualified, and then the hydraulic rod 2 301 is started to drive the inspection head 303 to move downward to impact the outer surface of the foam body 205. The limit groove 302 is used to guide the vertical movement of the inspection head 303. Move to ensure that the impact direction is correct. After the impact is completed, observe whether there are cracks, fractures, dents or other forms of deformation at the impact point of the foam body 205. The detection head 303 includes impact heads of different shapes such as a flat impact head 3033, a hemispherical impact head 3034 and a conical impact head 3035, which are used to simulate different types of impacts and test the local strength and impact resistance of the foam. The flat impact head 3033, the hemispherical impact head 3034 and the conical impact head 3035 are connected to the mounting block 3031 through a screw 3032 and can be flexibly replaced. After the test is completed, start the electric telescopic rod 402 to drive the ejection plate 401 and the ejection rod 403 to move upward to eject the four corners of the compressed foam body 205 in the detection frame 204 from the detection frame, so as to facilitate the operator to take samples and avoid the foam body 205 from being squeezed and adhering to the surface of the detection box 1, which makes it difficult to remove.

[0052] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed in the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A foam defect detection device, comprising a detection box (1), characterized in that: A plurality of columns (101) are symmetrically fixedly connected to the upper surface of the detection box (1), a top plate (102) is fixedly connected to the upper ends of the columns (101), an elasticity detection component (2) is provided on the outer surface of the columns (101), a strength detection component (3) is provided in the inner cavity of the elasticity detection component (2), and an ejection component (4) is provided in the inner cavity of the detection box (1); The elasticity detection assembly (2) comprises a hydraulic rod (201) fixedly connected to the inner cavity of the top plate (102); a movable plate (202) is slidably connected to the outer surface of the column (101); a compression block (203) is fixedly connected to the middle of the lower surface of the movable plate (202); and a detection frame (204) is fixedly connected to the middle of the upper surface of the detection box (1); The strength detection assembly (3) comprises a second hydraulic rod (301) fixedly connected to the inner cavity of the movable plate (202), wherein the lower end of the second hydraulic rod (301) is fixedly connected to a detection head (303); The ejection assembly (4) comprises an electric telescopic rod (402) fixedly connected to the top of the inner cavity of the detection box (1), the lower end of the electric telescopic rod (402) is fixedly connected to an ejection plate (401), and the upper surface of the ejection plate (401) is symmetrically fixedly connected to four ejection rods (403).

2. The foam defect detection device according to claim 1, characterized in that: The front surface of the detection box body (1) is hinged with a box door, and the lower end of the hydraulic rod (201) is fixedly connected to the upper surface of the movable plate (202).

3. The foam defect detection device according to claim 1, characterized in that: The detection frame (204) is made of a transparent material, and a scale (206) is fixedly connected to the middle position of one side of the detection frame (204). The scale (206) is made of a transparent material and has scale values set on its outer surface.

4. The foam defect detection device according to claim 1, characterized in that: The inner cavity of the detection frame (204) is movably connected to a foam body (205), and the compression block (203) moves within the detection frame (204).

5. The foam defect detection device according to claim 1, characterized in that: The inner cavities of the movable plate (202) and the compression block (203) are both provided with limiting grooves (302), and the detection head (303) moves in the limiting grooves (302).

6. The foam defect detection device according to claim 1, characterized in that: The detection head (303) comprises a mounting block (3031), the upper surface of which is fixedly connected to the second hydraulic rod (301).

7. The foam defect detection device according to claim 6, characterized in that: The inner cavity of the lower surface of the mounting block (3031) is provided with a thread, and the inner cavity of the mounting block (3031) is connected to a screw rod (3032) via the thread.

8. The foam defect detection device according to claim 7, characterized in that: The lower ends of the screw rod (3032) are respectively fixedly connected with a flat impact head (3033), a hemispherical impact head (3034) and a conical impact head (3035); the lower surface of the flat impact head (3033) is flat and is located on the same horizontal line as the lower surface of the compression block (203).

9. The foam defect detection device according to claim 8, characterized in that: The lower surface of the hemispherical impact head (3034) is semicircular, and the lower surface of the conical impact head (3035) is evenly provided with a plurality of conical protrusions.

10. The foam defect detection device according to claim 1, characterized in that: The ejector plate (401) is I-shaped, and the four ejector rods (403) are located at the four corners of the ejector plate (401). The outer surfaces of the ejector rods (403) are movably connected to the inner cavity of the detection box (1), and the upper ends of the ejector rods (403) are located on the same horizontal line as the upper surface of the detection box (1).

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