A foam resiliometer

Abstract

The utility model discloses a kind of foam rebound tester, including base, the top of rear portion of base is equipped with mounting plate;The front end of mounting plate is equipped with protruding tongue plate forward, and the impact opening of being passed is opened in tongue plate, and the impact opening below of tongue plate is equipped with sample stage, and sample stage is set on base;The outside of impact opening of tongue plate is equipped with fixed ring seat, and fixed ring seat is coaxially arranged with sample stage, and vertical testing cylinder is equipped on fixed ring seat, and mounting plate is equipped with the vertical column type support frame corresponding with testing cylinder matching;Screw rod is equipped in vertical column type support frame, and screw rod is arranged in parallel with testing cylinder, and the side of testing cylinder towards screw rod is equipped with the second stroke guide slot corresponding with screw rod matching, parallel;Lifting screw seat is sleeved on vertical column type support frame, and screw rod is arranged in lifting screw seat, and lifting screw seat is threadedly connected with screw rod;The side of lifting screw seat towards testing cylinder is equipped with hanging rod that is inserted into testing cylinder. The present application realizes test full-process automation, and improves test repeatability and stability.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically to a testing device for measuring the resilience of foam materials (such as polyurethane foam, sponge, foam, soft foam materials, etc.). Background Technology

[0002] Foam materials are widely used due to their excellent cushioning, comfort, and lightweight properties. One of the key performance indicators of foam is "resilience," which characterizes the material's ability to return to its original shape after being impacted by an external force. It is measured through a drop ball rebound test. High resilience means that the material has good energy absorption and release capabilities, which directly affects the comfort, durability, and safety of the product.

[0003] Existing foam rebound testing equipment mostly adopts manual or semi-automatic operation. The operation process typically includes: manually placing the sample, manually releasing the steel ball, and visually observing or using a ruler to read the rebound height. Existing tests have the following shortcomings: because they rely on visual observation or mechanical rulers to read the rebound height, they are prone to visual delays or misjudgments, easily introducing human error; each test requires manual sample placement, steel ball release, and mechanism reset, affecting the accuracy of the test results. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a foam rebound tester with a high degree of automation, strong repeatability, and improved testing efficiency and accuracy.

[0005] To achieve the above objectives, this utility model provides a foam resilience tester, which adopts the following technical solution: A foam rebound tester includes a base, with a mounting plate located on the upper rear of the base; a tongue plate protruding forward is located at the front end of the mounting plate, with a through impact hole on the tongue plate, and a sample stage located below the impact hole of the tongue plate, the sample stage being mounted on the base. A fixing ring seat is provided on the outside of the impact port of the tongue plate. The fixing ring seat is coaxially arranged with the sample stage. A vertically upward test cylinder is provided on the fixing ring seat. A column-type support frame matching the test cylinder is provided on the mounting plate. A screw is provided in the column-type support frame. The screw is arranged parallel to the test cylinder. A second stroke guide groove matching and parallel to the screw is opened on the side of the test cylinder facing the screw. A lifting screw seat is fitted on the column-type support frame, and a screw rod passes through the lifting screw seat. The lifting screw seat and the screw rod are threaded together. A hanging rod that extends into the test cylinder is provided on the side of the lifting screw seat facing the test cylinder. The end of the hanging rod away from the lifting screw seat passes through the second stroke guide groove and extends into the test cylinder. The end of the hanging rod that extends into the test cylinder is equipped with a release mechanism, which is located inside the test cylinder. A steel ball is located below the release mechanism.

[0006] Several support columns are provided between the mounting plate and the base. The sample stage and the impact port are arranged coaxially in the longitudinal direction. An adjustment seat is provided between the sample stage and the base. The sample is placed on the sample stage and is positioned between the sample stage and the tongue plate.

[0007] Furthermore, in one embodiment, a sensor is provided on the fixed ring seat; The test cylinder has a second-stroke guide groove to accommodate the insertion of the hanging rod.

[0008] Furthermore, in one embodiment, the bottom end of the screw is disposed on the mounting plate and passes under the mounting plate. The bottom end of the screw is provided with a transmission gear, which is connected to the output end of the motor via a belt. The motor is disposed on the mounting plate.

[0009] Furthermore, in one embodiment, the outer side of the column-type support frame is provided with a cover covering it. The cover is mounted on the mounting plate and has a first stroke guide groove that matches the second stroke guide groove of the test cylinder.

[0010] This application employs an automatic steel ball release mechanism to ensure the steel ball is released at zero initial velocity, eliminating human error and improving test accuracy. The sensor identifies the highest rebound point based on time series and velocity analysis. The release mechanism supports the replacement of steel balls of different specifications or adaptable fixtures to meet the testing requirements of different samples. This application achieves full automation of the entire process from "sample placement → start-up lifting → steel ball release → data acquisition → data display," requiring no manual intervention and improving test repeatability and stability. Attached Figure Description

[0011] Figure 1 The image shown is a schematic diagram of the appearance of an embodiment of this utility model; Figure 2 The figure shown is a perspective view of an embodiment of the present utility model; Figure 3 The diagram shown is a structural schematic of an embodiment of this utility model; Figure 4 The diagram shown is a structural schematic of the mounting plate portion of an embodiment of this utility model; Figure 5 The diagram shown is a structural schematic of the lifting screw seat part in an embodiment of this utility model.

[0012] Explanation of symbols for key components in the diagram: Base 11, mounting plate 12, motor 13, screw 14, column support frame 15, tongue plate 16, test cylinder 17, lifting screw seat 18, fixing ring seat 19, sample stage 21, adjusting seat 22, machine cover 23, first stroke guide groove 24, hanging rod 25, sensor 26, second stroke guide groove 27, support column 28, transmission gear 29, release mechanism 31, steel ball 32, impact port 33, sample 39. Detailed Implementation

[0013] To further understand the features, technical means, specific objectives and functions of this utility model, and to analyze its advantages and spirit, a detailed description of this utility model is provided below in conjunction with the accompanying drawings and specific embodiments.

[0014] Referring to the attached drawings, this utility model includes a base 11, with a mounting plate 12 located above the rear of the base 11. Several vertically arranged support columns 28 are positioned between the mounting plate 12 and the base 11. A forward-protruding tongue plate 16 is located at the front end of the mounting plate 12, and a through impact port 33 (impact hole) is formed on the tongue plate 16. A horizontal sample stage 21 is located below the impact port 33 of the tongue plate 16, and the sample stage 21 is longitudinally coaxial with the impact port 33. The sample stage 21 is mounted on the base 11. Furthermore, an adjustment seat 22 is provided between the sample stage 21 and the base 11. A sample 39 is mounted on the sample stage 21, positioned between the sample stage 21 and the tongue plate 16. The sample stage 21 is used to fix the foam sample to be tested. The height of the sample stage 21 can be adjusted via the adjustment seat 22 to accommodate foam samples of different thicknesses, ensuring a constant initial drop height.

[0015] Furthermore, in some embodiments, a fixing ring seat 19 is provided on the outside of the impact port 33 of the tongue plate 16. The fixing ring seat 19 is coaxially arranged with the sample stage 21. A vertically upward test cylinder 17 is provided on the fixing ring seat 19. After the release mechanism 31 releases the steel ball 32 at the top of the column support frame 15, the test cylinder 17 is used to guide the steel ball 32 to fall freely in the vertical direction.

[0016] The release mechanism 31 adopts an electromagnetic holding structure or a pneumatic clamping structure to stably hold the steel ball 32 and release it instantly after the command is triggered.

[0017] The mounting plate 12 is equipped with a column-type support frame 15 that matches the test cylinder 17. A screw 14 is installed in the column-type support frame 15, and the screw 14 is arranged parallel to the test cylinder 17. A second stroke guide groove 27, matching and parallel to the screw 14, is opened on the side of the test cylinder 17 facing the screw 14. A sensor 26 is installed on the fixing ring seat 19. The sensor 26 is used to monitor the speed of the steel ball 32 during its fall and the rebound time interval. Based on the mass of the steel ball 32, the highest rebound point value of the steel ball 32 is obtained through data processing.

[0018] Furthermore, in some embodiments, a lifting screw seat 18 is fitted on the column support frame 15, and a screw 14 passes through the lifting screw seat 18, with the lifting screw seat 18 and the screw 14 threadedly connected; a hanging rod 25 extending into the test cylinder 17 is provided on the side of the lifting screw seat 18 facing the test cylinder 17, and a second stroke guide groove 27 is provided on the test cylinder 17 to accommodate the hanging rod 25 extending into it; one end of the hanging rod 25 away from the lifting screw seat 18 passes through the second stroke guide groove 27 and extends into the test cylinder 17, and a release mechanism 31 is provided at the end of the hanging rod 25 extending into the test cylinder 17, the release mechanism 31 is provided inside the test cylinder 17, and a steel ball 32 is provided below the release mechanism 31.

[0019] The bottom end of the screw 14 is mounted on the mounting plate 12 and passes under the mounting plate 12. The bottom end of the screw 14 is provided with a transmission gear 29, which is connected to the output end of the motor 13 via a belt. The motor 13 is mounted on the mounting plate 12.

[0020] The outer side of the column support frame 15 is provided with a cover 23, which is mounted on the mounting plate 12. The cover 23 is provided with a first stroke guide groove 24 that matches the second stroke guide groove 27 of the test cylinder 17.

[0021] The above embodiments only illustrate several preferred implementations of this utility model, and their descriptions are relatively specific and detailed. It should be understood that this utility model is not limited to the forms disclosed herein and should not be considered as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or related field techniques or knowledge. This should not be construed as a limitation on the scope of this utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model. Such modifications and changes do not depart from the spirit and scope of this utility model, and all fall within the protection scope of the appended claims. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A foam resilience tester, comprising: A base (11) is provided with an mounting plate (12) above the rear part of the base (11); characterized in that the front end of the mounting plate (12) is provided with a tongue plate (16) protruding forward, and the tongue plate (16) is provided with a through impact hole (33), and a sample stage (21) is provided below the impact hole (33) of the tongue plate (16), and the sample stage (21) is set on the base (11). A fixing ring seat (19) is provided on the outside of the impact port (33) of the tongue plate (16). The fixing ring seat (19) is coaxially arranged with the sample stage (21). A vertically upward test cylinder (17) is provided on the fixing ring seat (19). A column-type support frame (15) matching the test cylinder (17) is provided on the mounting plate (12). A screw (14) is provided in the column-type support frame (15). The screw (14) is arranged parallel to the test cylinder (17). A second stroke guide groove (27) matching and parallel to the screw (14) is opened on the side of the test cylinder (17) facing the screw (14). A lifting screw seat (18) is fitted on the column support frame (15), and a screw (14) passes through the lifting screw seat (18). The lifting screw seat (18) and the screw (14) are threadedly connected. The side of the lifting screw seat (18) facing the test cylinder (17) is provided with a hanging rod (25) that extends into the test cylinder (17). The end of the hanging rod (25) away from the lifting screw seat (18) passes through the second stroke guide groove (27) and extends into the test cylinder (17). The end of the hanging rod (25) that extends into the test cylinder (17) is provided with a release mechanism (31). The release mechanism (31) is set inside the test cylinder (17), and a steel ball (32) is provided below the release mechanism (31).

2. The foam resilience tester according to claim 1, characterized in that, The mounting plate (12) and the base (11) are provided with a number of support columns (28). The sample stage (21) and the impact port (33) are arranged longitudinally and coaxially. An adjustment seat (22) is provided between the sample stage (21) and the base (11). The sample (39) is provided on the sample stage (21). The sample (39) is set between the sample stage (21) and the tongue plate (16).

3. The foam resilience tester according to claim 1, characterized in that, The fixed ring seat (19) is equipped with a sensor (26); The test cylinder (17) has a second stroke guide groove (27) for accommodating the insertion of the hanging rod (25).

4. The foam resilience tester according to claim 1, characterized in that, The bottom end of the screw (14) is set on the mounting plate (12), and the bottom end of the screw (14) passes under the mounting plate (12). The bottom end of the screw (14) is provided with a transmission gear (29), and the transmission gear (29) is connected to the output end of the motor (13) through a belt. The motor (13) is set on the mounting plate (12).

5. The foam resilience tester according to claim 1, characterized in that, The outer side of the column support frame (15) is provided with a cover (23) covering it. The cover (23) is set on the mounting plate (12). The cover (23) is provided with a first stroke guide groove (24) that matches the second stroke guide groove (27) of the test cylinder (17).

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