北京海綿落球回彈試驗機廠家  主要配置：

1、試驗主機一臺（含微型打印功能）
   2、智能液晶控制操作系統一臺
   3、鋼球釋放機構1套
   4、鋼球捕捉機構(精密光電傳感器)一套
   5、高度調節機構一組
   6、鋼球2個
北京海綿落球回彈試驗機廠家   適用范圍及功能：
適用于測定軟質聚氨酯泡沫塑料的落球式回彈性能.海綿泡沫塑料落球回彈測試儀通過標準規定直徑和質量的鋼球在規定高度上自由落在海綿泡沫塑料試樣上，自動計算鋼球回彈的zui大高度與鋼球落下高度比值的百分率（既回彈率），以回彈率表示泡沫塑料的回彈性能。海綿泡沫塑料落球回彈測試儀采用微處理器進行控制，液晶屏顯示中文操作，具有使用操作方便，性能可靠，測量精度高等特點，并可打印試驗數據。

Main configuration:

1, a test host (including micro-printing function)

2, a smart LCD control operating system

3. 1 set of steel ball release mechanism

4. A set of steel ball capturing mechanism (precision photoelectric sensor)

5, a set of height adjustment mechanism

6. Two steel balls
實驗步驟

將調節后的試樣水平置于回彈儀的測試位置上，通過調節使鋼球底部從固定位置到泡沫塑料表面的落下高度為460mm。在釋放裝置上固定鋼球，然后使鋼球自由落下。對每一個試樣做三次回彈，取三次回彈中的最大值。每次回彈鋼球應落在試樣表面的同一位置上，并且兩次回彈的時間間隔應控制在20s之內。如果鋼球在回彈過程中碰到或彈出測量裝置，所得數據無效，需重新補做。

下列術語和定義適用于本標準。

2.1開孔軟質泡沫材料：封閉的泡孔體積小于25%的軟質泡沫材料。

2.2閉孔軟質泡沫塑料：封閉的泡孔體積大于25%的軟質泡沫材料。

原理：具有一定質量和直徑的鋼球，從固定高度下落到試樣表面，測量鋼球彈起的高度，計算鋼球彈起高度與下落高度比值的百分率。

方法A，測試儀器和主要參數：

海綿落球回彈性能測試儀，包括一根內徑30mm～60mm的透明管子，一個直徑16mm?0.5mm的鋼球，質量為16.8g?1.5g，由磁鐵或其他裝置釋放。下落過程中沒有旋轉，一直處于中心位置。下落高度為500mm?0.5mm。球頂部距離試樣表面應為516mm。因此，零回彈得原點為試樣表面上方鋼球的直徑距離。

如果管子不垂直可能會引起測量誤差，鋼球在下落或回彈過程中接觸管子內壁，測量結果無效。用水平儀或類似裝置校準硬基準面以保證水平，并將透明管及架垂直安放。

試驗步驟及結果表示：

1.預壓狀態調節：開孔軟質泡沫材料在試驗前應先進行預壓狀態調節。方法是在0.4mm/s～6mm/s速度下，將試樣壓縮到原始厚度的75%～80%，預壓2次來對試樣進行預應力狀態調節，然后允許試樣有一個10min?5min的恢復期。

注：預應力狀態調節不適用于3.2中提到的閉孔軟質泡沫材料。

試驗方法A：

1.按照第8章中規定的條件，狀態調節后立即開始試驗。

2.將試樣放在基準面，調節管子的高度，使零回彈為試樣表面上方16mm?0.5mm處。固定管子以確定管子和試樣間有輕接觸，不引起任何可視的壓力。

3.將鋼球放在釋放裝置上，然后釋放鋼球，記錄回彈最大高度整數值。球下落過程中或回彈過程中，如果碰到管子內壁，試驗結果無效。發生這種情況，主要是由于管子不垂直或試樣表面不均勻。為了減小視覺誤差，試驗員的視線應與管子上的回彈讀數刻度線成水平直線。為了證明視覺水平的準確性，試測是必要的。

4.三個試樣分別要在1min內至少得到3個有效的回彈值。

5.結果表示每個試樣測得3個結果。如果有一個值超過中值的20%（五分之一），再多試驗兩次，確定5個值中的中值。從3個樣品的中值中，再取中值為樣品的回彈率。

自動測量裝置顯示的結果有效位數取整數。

試驗方法B

1.按照第8章中規定的條件，狀態調節后立即開始試驗。

2.將試樣水平置于回彈儀位置上，通過調節使鋼球底部從固定位置到試樣表面的落下高度為460mm。

3.將鋼球放在釋放裝置上，然后釋放鋼球，記錄回彈最大高度整數值。球下落過程中或回彈過程中，如果碰到管子內壁，試驗結果無效。發生這種情況，主要是由于管子不垂直或試樣表面不均勻。為了減小視覺誤差，試驗員的視線應與管子上的回彈讀數刻度線成水平直線。為了證明視覺水平的準確性，試測是必要的。

4.三個試樣分別要在1min內至少得到3個有效的回彈值。

5.結果表示每個試樣測得3個結果，從3個結果中取最大值。再計算3個最大值的平均值作為樣品的回彈率。

技術參數：
　1、鋼球回落高度：        460mm（國標） 
                           500mm（美標）
　2、鋼球直徑：       ￠16mm
　3、落球回彈率精度： <1%
　4、被測試樣尺寸：    長*寬*高=100 mm?100 mm?100（50）mm
 5、自動計算平均回彈高度
 6、自動計算平均回彈率

7、適用于測定軟質聚氨酯泡沫塑料的落球式回彈性能。

8、滿足08標準A法和B法試驗方法。主要是測試塑料泡沫材料及海綿材料的回彈性能。

9、落球回彈測量精度高采用微處理器進行控制，中文顯示，并可打印試驗數據。

10、落球回彈是通過給定直徑和質量的鋼球在規定高度上自由落在泡沫塑料試樣上，計算鋼球回彈的最大高度與鋼球落下高度比值的百分率既回彈率，以回彈率表示泡沫塑料的回彈性能。

制造標準：

(GB/T6670-2008 ISO8307 ASTM D3574 ISO8307)軟質泡沫聚合材料落球法回彈性能的測定

海綿泡沫塑料落球回彈測試儀通過標準規定直徑和質量的鋼球在規定高度上自由落在海綿泡沫塑料試樣上，自動計算鋼球回彈的最大高度與鋼球落下高度比值的百分率（既回彈率），以回彈率表示泡沫塑料的回彈性能。

海綿泡沫塑料落球回彈測試儀采用微處理器進行控制，液晶屏顯示中文操作，具有使用操作方便，性能可靠，測量精度高等特點，并可打印試驗數據。

人工讀值設備：

在管子背面有序的按百分比劃上刻度線，每5%（25mm）一個大刻度和每1%（5mm）一個小刻度，角度為120?弧線。這個完整的圓周劃線是儀器不可缺少的重要部分，它可以排除視差錯誤。Manual reading equipment:

Mark marks on the back of the pipe in an orderly percentage, with a large scale every 5% (25mm) and a small scale every 1% (5mm), at an Angle of 120?arc. This complete circumference marking is an indispensable part of the instrument, which can eliminate parallax errors.

Automatic reading device:

A device that electronically displays the rebound height of a steel ball has proved to be the same as a manual reading. The height of the rebound can be calculated by the speed of the ball rebound or the time interval between the first and second contact of the ball with the foam surface. The installed electronic device shall display an accuracy of?1% (5mm) of the height. The pipe of such a device does not need to be marked.

Method B, test instrument and main parameters:

The same equipment as method A foam falling ball resilience tester, manual reading value equipment also has automatic reading equipment. The accuracy of the instrument is less than 1.5%, the main parameters of the steel ball diameter are the same as that of method A, and the steel ball mass is 16.3g (0.5g lighter than the 5.1 steel ball). The important different parameters are: the drop height of the steel ball is 460mm?0.5mm. Therefore, the rebound values measured by method A and method B cannot be directly converted.

自動讀值設備：

一種能通過電子方式顯示出鋼球回彈高度的儀器，它已被證實和人工讀出的結果是一樣的。通過鋼球回彈的速度或鋼球第一次到第二次接觸泡沫表面的時間間隔可以計算出回彈的高度，安裝的電子設備應顯示出高度的?1%（5mm）精度，這種裝置的管子不需要劃刻度。

方法B，測試儀器和主要參數：

與方法A相同設備泡沫落球回彈性能測定儀，有人工讀值設備也有自動讀值設備。數字顯示落球回彈儀，儀器精度為相對誤差小于1.5%，主要參數鋼球直徑與方法A相同，鋼球質量16.3g（比5.1的鋼球輕0.5g）。重要的不同參數是：鋼球的下落高度為460mm?0.5mm。使得方法A和方法B測出的回彈值不能直接換算。

Application scope and functions:

It is suitable for determining the falling ball resilience of soft polyurethane foams. Sponge foam falling ball rebound tester through the standard diameter and quality of the steel ball at the specified height of free fall on the sponge foam sample, automatically calculate the maximum height of the steel ball rebound and the percentage of the steel ball falling height (that is, the rebound rate), the rebound rate indicates the resilience of the foam. Sponge foam falling ball rebound tester is controlled by microprocessor, LCD screen displays Chinese operation, has the characteristics of easy operation, reliable performance, high measurement accuracy, and can print test data.

Experimental procedure

The adjusted sample is placed horizontally on the test position of the rebound instrument, and the falling height from the fixed position of the bottom of the steel ball to the foam surface is 460mm by adjustment. Secure the ball on the release device, and then let the ball fall freely. Do three bounces for each sample and take the maximum value of the three bounces. Each rebound ball should fall on the same position on the surface of the sample, and the time interval between the two rebounds should be controlled within 20s. If the steel ball hits or pops out of the measuring device during the rebound process, the data obtained is invalid and needs to be made up again.

The following terms and definitions apply to this standard.

2.1 Open cell soft foam materials: soft foam materials with closed cell volume less than 25%.

2.2 Closed cell soft foam: soft foam material with closed cell volume greater than 25%.

Principle: A steel ball with a certain mass and diameter falls from a fixed height to the surface of the sample, measures the height of the ball bouncing, and calculates the percentage of the ratio between the height of the ball bouncing and the height of the falling.

Method A, test instrument and main parameters:

The sponge falling ball resilience tester comprises a transparent tube with an inner diameter of 30mm ~ 60mm, a steel ball with a diameter of 16mm?0.5mm and a mass of 16.8g?1.5g, which is released by a magnet or other device. It doesn't rotate as it falls, it stays centered. The drop height is 500mm?0.5mm. The top of the ball should be 516mm away from the specimen surface. Therefore, the zero rebound origin is the diameter distance of the steel ball above the specimen surface.

If the pipe is not vertical, the measurement error may be caused, and the steel ball will contact the inner wall of the pipe during the fall or rebound process, and the measurement result will be invalid. Calibrate the hard datum with a level or similar device to ensure level, and place the transparent tube and frame vertically.

Test procedures and results are shown as follows:

1. Pre-pressure state adjustment: The open-cell soft foam material should be pre-pressure state adjustment before the test. The method is to compress the sample to 75% to 80% of the original thickness at a speed of 0.4mm/s ~ 6mm/s, prepress the sample twice to adjust the prestressed state, and then allow the sample to have a recovery period of 10min?5min.

Note: Prestressed state regulation does not apply to closed cell soft foam materials mentioned in 3.2.

Test Method A:

1. Start the test immediately after state adjustment in accordance with the conditions specified in Chapter 8.

2. Place the sample on the datum surface and adjust the height of the pipe so that the zero rebound is 16mm?0.5mm above the surface of the sample. Secure the tube to ensure that there is light contact between the tube and the specimen without causing any visible pressure.

3. Put the steel ball on the release device, then release the steel ball, and record the maximum rebound height integer value. If the ball hits the inner wall of the pipe during the fall or rebound process, the test result is invalid. This happens mainly because the tube is not vertical or the specimen surface is not uniform. In order to reduce visual errors, the tester's line of sight should be horizontal with the rebound reading scale line on the tube. In order to prove the accuracy of the visual level, a test is necessary.

4. The three samples shall obtain at least 3 effective rebound values within 1min respectively.

5. Results indicate that 3 results are measured for each sample. If one value exceeds 20% (one-fifth) of the median value, try it twice more to determine the median of the five values. From the median value of the 3 samples, the median value is the rebound rate of the sample.

The significant digit of the result displayed by the automatic measuring device is integer.

Test method B

1. Start the test immediately after state adjustment in accordance with the conditions specified in Chapter 8.

2. Place the sample horizontally on the position of the rebound meter, and adjust the falling height of the bottom of the steel ball from the fixed position to the surface of the sample to 460mm.

3. Put the steel ball on the release device, then release the steel ball, and record the maximum rebound height integer value. If the ball hits the inner wall of the pipe during the fall or rebound process, the test result is invalid. This happens mainly because the tube is not vertical or the specimen surface is not uniform. In order to reduce visual errors, the tester's line of sight should be horizontal with the rebound reading scale line on the tube. In order to prove the accuracy of the visual level, a test is necessary.

4. The three samples shall obtain at least 3 effective rebound values within 1min respectively.

5. The result indicates that each sample has 3 results, and the maximum value is taken from the 3 results. The average value of the three maximum values is calculated as the rebound rate of the sample.

Technical parameters:

1, steel ball fall height: 460mm (national standard)

500mm (US standard)

2, steel ball diameter:￠16mm

3, drop ball rebound rate accuracy: <1%

4, the test sample size: length * width * height =100 mm?100 mm?100 (50) mm

5, automatically calculate the average rebound height

6, automatically calculate the average rebound rate

7, suitable for the determination of soft polyurethane foam falling ball resilience.

8, meet the 08 standard A method and B method test methods. Mainly to test the resilience of plastic foam materials and sponge materials.

9, high accuracy of falling ball rebound measurement using microprocessor control, Chinese display, and can print test data.

10, falling ball rebound is through the given diameter and quality of the steel ball at the specified height of the free fall on the foam sample, calculate the maximum height of the steel ball rebound and the steel ball falling height ratio of the percentage of the rebound rate, the rebound rate represents the resilience of the foam.

Manufacturing standard:

(GB/T6670-2008 ISO8307 ASTM D3574 ISO8307) Determination of resilience of soft foam polymeric materials by falling ball method

Sponge foam falling ball rebound tester through the standard diameter and quality of the steel ball at the specified height of the free fall on the sponge foam sample, automatically calculate the maximum height of the steel ball rebound and the steel ball falling height ratio of the percentage (i.e., the rebound rate), with the rebound rate to indicate the resilience of foam.

Sponge foam falling ball rebound tester is controlled by microprocessor, LCD screen displays Chinese operation, has the characteristics of easy operation, reliable performance, high measurement accuracy, and can print test data.