Rebound testing device for polyurethane sponge

Abstract

The utility model relates to a polyurethane sponge rebound testing device in the technical field of sponge rebound detection. The polyurethane sponge rebound testing device comprises a sheet punching machine with a pressure column head and a base table, a bottom supporting plate is arranged on the upper table face of the base table, at least two sliding grooves extending from the middle of the bottom supporting plate to the edge of the bottom supporting plate are evenly and annularly formed in the upper plate face of the bottom supporting plate, and sliding blocks which can slide along the sliding grooves and are positioned through detachable positioning pieces are clamped in the sliding grooves. A side supporting piece is fixed to the upper surface of each sliding block, a cavity used for containing sponge is defined by all the side supporting pieces, a gap is reserved between every two adjacent side supporting pieces, the upper portion of the cavity is covered with a sheet, the position, corresponding to the gap, of the sheet extends outwards to form an indicating strip, and thickness scales are arranged on the outer walls, corresponding to the gap, of the side supporting pieces. A pressing plate piece corresponding to the cavity is detachably mounted at the lower end of the pressing column head; the springback testing device not only can conveniently obtain accurate detection data, but also can provide pressure detection in different states.

Description

Technical Field

[0001] The utility model relates to the technical field of sponge rebound detection, in particular to a polyurethane sponge rebound testing device. Background Art

[0002] As is well known, polyurethane sponge is a porous plastic material made from polyurethane compounds. It is lightweight, soft, and elastic, and is widely used in furniture, sound insulation, building insulation, cleaning tools, and other fields. Whether the polyurethane sponge meets the requirements, the rebound state is a relatively important test criterion. As shown in Chinese Utility Model Publication No. CN221426189U, the traditional standard sponge rebound tester is to let a steel ball of a given diameter and mass fall freely on a foam plastic sample from a specified height. The rebound rate is then calculated as the percentage of the maximum rebound height of the steel ball divided by the falling height, which is used to indicate the rebound performance of the foam plastic. However, in the actual market, customers often also require the rebound rate of polyurethane sponge under specific pressure and specific duration. Specialized testing equipment requires additional procurement costs and adaptive modification. Even if the test is submitted for external inspection, it must first be self-tested.

[0003] A punching machine is a conventional machine used for punching standard test pieces in every rubber or sponge factory. It can control the pressure column head to drive a cutter tool with a specific shape to press down, and cut the material placed on the base table into a fixed shape. Therefore, the factory currently generally performs self-inspection of the rebound of polyurethane sponge based on the continuous pressure provided by the punching machine; however, during self-inspection, a ruler is often used to manually measure the thickness of the sponge before and after rebound, which is inefficient. Moreover, the punching machine can only provide vertical pressure. When the pressure column head is lifted, the sponge may be pulled back due to adhesion, affecting the authenticity of the test data. Further modification is necessary. Utility Model Content

[0004] In order to overcome the deficiencies in the background technology and solve the existing technical problems, the utility model discloses a polyurethane sponge rebound testing device, which can not only conveniently obtain accurate test data, but also provide pressure detection in different states.

[0005] In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solutions:

[0006] A polyurethane sponge rebound testing device comprises a punching machine with a pressure column head and a base table; the upper table surface of the base table is provided with a bottom support plate, and the upper plate surface of the bottom support plate is evenly circumscribed with at least two slide grooves extending from the middle of the bottom support plate to the edge, and a slider that can slide along the slide groove and is positioned by a detachable positioning member is clamped in the slide groove; a side support member is fixed to the upper surface of each slider, and all side support members are surrounded to form a cavity for placing the sponge, and a gap is left between adjacent side support members, the upper part of the cavity is covered with a thin sheet, and the thin sheet extends outward at the gap corresponding to the gap to form an indicator strip, and the side support member is provided with a thickness scale on the outer wall corresponding to the gap; the lower end of the pressure column head is detachably mounted with a pressure plate member corresponding to the cavity.

[0007] Furthermore, four slide grooves are provided along the diagonal line of the bottom support plate.

[0008] Furthermore, the slide groove is configured as an inverted T-shaped groove to which the slider is adapted to be clamped.

[0009] Furthermore, a threaded through hole is provided on the upper surface of the slider, and a positioning screw is screwed into the threaded through hole.

[0010] Furthermore, the side support member is configured to be L-shaped or arc-shaped surrounding the cavity.

[0011] Furthermore, the thin sheet is made of transparent plastic material.

[0012] Furthermore, a groove adapted to insert a pressure column head is provided in the middle of the upper plate surface of the pressure plate.

[0013] Furthermore, the punching machine is configured as a manual punching machine capable of controlling the pressing column head to be pressed down toward the substrate table for positioning by screwing.

[0014] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0015] The rebound testing device for polyurethane sponge disclosed by the utility model can place the sponge in the mold cavity, and the pressure column head drives the pressure plate to press down to a certain height to carry out a timed and constant pressure pressure test. After the test, the pressure plate is lifted, and the thickness data of the sponge before and after the test can be quickly read by the indicator bar pointing to the thickness scale. The thin sheet can also isolate the pressure plate and the sponge to prevent the sponge from being directly lifted up by being stuck to the pressure plate, which not only facilitates measurement but also ensures the authenticity of the measurement. More importantly, if the test only requires vertical pressure, the side support members do not need to be positioned on the bottom support plate, but can automatically expand and move outward as the sponge is compressed and expanded. If the test requires side pressure to detect the recovery state of the sponge plug when used, it can be achieved by fixing and positioning the side support members, thereby achieving the effect of adapting to different testing needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the implementation structure of the utility model;

[0017] Figure 2 1. It is a schematic top view of the installation of the bottom support plate and the side support members;

[0018] Figure 3 1 is a partial schematic diagram of the cross section of the chute.

[0019] In the figure: 1, pressure column head; 2, pressure plate; 3, bottom support plate; 301, slide groove; 4, base platform; 5, thickness scale; 6, side support member; 7, thin sheet; 701, indicator strip; 8, slider; 9, positioning screw. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" and the like indicating directions or positional relationships, these are merely corresponding to the drawings of the present invention and are for the convenience of describing the present invention. They do not indicate or imply that the devices or components referred to must have a specific direction.

[0021] Combined with attachment Figure 1-3 The polyurethane sponge rebound test device includes a punching machine having a pressing column head 1 and a base table 4. As needed, the punching machine is configured as a manual punching machine capable of controlling the pressing column head 1 to press down and position toward the base table 4 by screwing, which is convenient for manual operation using local materials. The punching machine is conventional equipment, and its specific structure and operation will not be described in detail here.

[0022] The top surface of the base table 4 is provided with a bottom support plate 3, and the bottom support plate 3 can be placed or fixed on the base table 4. The upper surface of the bottom support plate 3 is evenly ringed with at least two slide grooves 301 extending from the middle of the bottom support plate 3 to the edge. The specific number of slide grooves 301 corresponds to the number of side support members 6; according to needs, four slide grooves 301 are provided along the diagonal lines of the bottom support plate 3 to facilitate the processing of the slide grooves 301; a slider 8 that can slide along the slide groove 301 and is positioned by a detachable positioning member is mounted in the slide groove 301, that is, the slider 8 can slide freely as needed, or be positioned and fixed at a certain position of the slide groove 301 by the positioning member as needed; according to needs, the slide groove 301 is set as an inverted T-shaped groove that the slider 8 is adapted to be mounted on, so as to prevent the slider 8 from moving and tilting; in addition, a threaded through hole is provided on the upper surface of the slider 8, and a positioning screw 9 is screwed in the threaded through hole. By tightening the positioning screw 9, the slider 8 can be stuck in the slide groove 301 and fixed;

[0023] The upper surface of each slider 8 is fixed with a side support member 6, and all the side support members 6 are surrounded to form a cavity for placing the sponge, and a gap is left between the adjacent side support members 6 to ensure that the side support members 6 can move and position with the slider 8; according to needs, the side support members 6 are set to be L-shaped or arc-shaped to surround the cavity, depending on the shape of the sponge to be tested; the upper part of the cavity is covered with a thin sheet 7, and the thin sheet 7 is made of transparent plastic material. The primary purpose is lightness to prevent its own weight from affecting the rebound test, and at the same time it plays the role of isolating the pressure plate member 2 from contacting and adhering to the sponge. The thin sheet 7 extends outward at the corresponding gap to form an indicator bar 701, and the side support member 6 is provided with a thickness scale 5 on the outer wall corresponding to the gap. The thin sheet 7 is placed above the sponge and indicates the real-time thickness of the sponge as the sponge is pressed down and rebounded; the lower end of the pressure column head 1 is detachably installed with a pressure plate member 2 corresponding to the cavity, and specifically, a groove for inserting the pressure column head 1 is provided in the middle of the upper plate surface of the pressure plate member 2, which is convenient for disassembly and replacement.

[0024] To implement the rebound test device for the polyurethane sponge described in the present invention, it is only necessary to loosen or remove the positioning screw 9 when detecting the rebound change of the sponge under vertical pressure, and then adjust the side support 6 by sliding so that the center of the formed cavity is opposite to the pressure column head 1, and then put the polyurethane sponge into the cavity. After the indicator bar 701 corresponds to the gap, the thin sheet 7 is placed on the upper surface of the polyurethane sponge, and the thickness data of the sponge before the test is read first. Then, the pressure column head 1 can be controlled to press down to the set height and maintain it for the set time. After the time is completed, the pressure column head 1 is lifted, and the sponge automatically rebounds to a stop, and then the thickness data of the sponge after the test is read. If the side support 6 is pushed outward too far during the test, it can also be manually pushed back to its position so that it is close to the indicator bar 701 for reading; if the sponge is plugged into a specific container with lateral limit when used, then it is necessary to detect the rebound change caused by vertical pressure when the side is restricted according to actual conditions. The basic steps of the detection are the same as above. It is only necessary to tighten the positioning screw 9 and position the side support 6 on the bottom support plate before inserting the sponge.

[0025] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. A polyurethane sponge rebound test device, comprising a punching machine having a pressing column head (1) and a base table (4), characterized in that: The upper surface of the base table (4) is provided with a bottom support plate (3), and the upper surface of the bottom support plate (3) is evenly provided with at least two slide grooves (301) extending from the middle of the bottom support plate (3) to the edge, and a slider (8) that can slide along the slide groove (301) and is positioned by a detachable positioning member is clamped in the slide groove (301); a side support member (6) is fixed on the upper surface of each slider (8), and all side support members (6) are surrounded to form a cavity for placing the sponge, and a gap is left between adjacent side support members (6), and the upper part of the cavity is covered with a thin sheet (7), and the thin sheet (7) extends outward at the gap corresponding to the gap to form an indicator strip (701), and the outer wall of the side support member (6) corresponding to the gap is provided with a thickness scale (5); the lower end of the pressure column head (1) is detachably installed with a pressure plate member (2) corresponding to the cavity.

2. The polyurethane sponge rebound testing device according to claim 1, characterized in that: Four sliding grooves (301) are provided along the diagonal line of the bottom support plate (3).

3. The polyurethane sponge rebound testing device according to claim 1, characterized in that: The sliding groove (301) is configured as an inverted T-shaped groove adapted for snap-fitting the slider (8).

4. The polyurethane sponge rebound testing device according to claim 3, characterized in that: A threaded through hole is provided on the upper surface of the slider (8), and a positioning screw (9) is screwed into the threaded through hole.

5. The polyurethane sponge rebound testing device according to claim 1, characterized in that: The side support member (6) is configured to be L-shaped or arc-shaped surrounding the cavity.

6. The polyurethane sponge rebound testing device according to claim 1, characterized in that: The thin sheet (7) is made of transparent plastic material.

7. The polyurethane sponge rebound testing device according to claim 1, characterized in that: A groove adapted to insert and insert the pressure column head (1) is provided in the middle of the upper plate surface of the pressure plate member (2).

8. The polyurethane sponge rebound testing device according to claim 1, characterized in that: The sheet punching machine is configured as a manual sheet punching machine capable of pressing the pressing column head (1) downward toward the substrate table (4) by screwing and controlling the pressing column head (1).

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