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XJL塑料拉伸冲击强度试验机
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XJL塑料拉伸冲击强度试验机 
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XJL塑料拉伸冲击强度试验机                       
   指针式控制,直观易于读数,液晶屏显示,自动计算冲击结果。
一 拉伸冲击试验机产品介绍

拉伸冲击试验机主要用于在规定的拉伸冲击速度下,测定塑料试样断裂所需能量的测试。 用于测定塑料等非金属材料的脆性、韧性。
二 拉伸冲击试验机符合标准:

GB/T13525《塑料拉伸冲击性能试验方法》

ASTM D1822《使塑料及电绝缘材料断裂所需的拉伸冲击能量的测试方法》

ISO 8256《塑料-拉伸-冲击强度的测定》

三 拉伸冲击试验机技术参数:

技术参数:

1)冲击速度:3.8m/s 
2)冲击能量:15J 、25J任选
3)摆锤力矩:pd15J=8.03848Nm pd25J=13.39746Nm
4)摆锤预扬角:150°
5)打击中心距:395mm
6)使用温度:(10~35)℃
7)试样尺寸:长度80±2mm 宽度15±0.5mm 厚度<4mm
夹具间的自由长度:30±2mm

2)电源: 220VAC-15%~220VAC 10% 50HZ (单相三线制)




Tensile impact strength tester for XJL plastic

Pointer control, intuitive and easy to read, LCD display, automatic calculation of impact results.

Introduction of tensile impact testing machine

Tensile impact testing machine is mainly used for testing the energy required for fracture of plastic samples under the specified tensile impact speed. It is used to determine brittleness and toughness of nonmetallic materials such as plastics.

Two the tensile impact testing machine meets the standards:

GB/T13525 "test method for tensile impact properties of plastics"

ASTM D1822-2006 "test method for tensile impact energy required for fracture of plastics and electrical insulating materials"

ISO 8256-2004 "plastics tensile determination of impact strength"

Three tensile impact testing machine technical parameters:

Technical parameters:

1) impact speed: 3.8m/s

2) impact energy: 15J, 25J optional

3) pendulum torque: pd15J=8.03848Nm pd25J=13.39746Nm

4) pendulum preheating angle: 150 degrees.

5) strike center distance: 395mm

6) use temperature: (10~35) C

7) sample size: length 80 + 2mm width 15 + 0.5mm thickness <4mm

Free length of fixture: 30 + 2mm

2) power supply: 220VAC-15% to 220VAC 10% 50HZ (single phase three wire system)

Terminology: Tensile Impact Strength: The ratio of the impact energy consumed by tensile impact failure of the specimen to the minimum cross-section of the specimen before testing, KJ/m2

Permanent elongation at break: the rate of change (%) of the gauge measured by splicing the fractured parts with respect to the original gauge at 1 minute after fracture

Working Principle: One end of the specimen is fixed on the jig of the pendulum impact testing machine, the other end is fixed on the T-shaped head. The energy is provided by the one-way swing of the pendulum, and the T-shaped head is impacted. The specimen is destroyed at a higher tensile deformation rate. The T-shaped head is thrown out together with a part of the specimen, and the energy consumed by the pendulum and the specimen are measured. The tensile impact strength and the permanent elongation at break of the specimens were calculated after calibration. The test results of different types or sizes of samples can not be compared.

Test device:

1. The pendulum of the testing machine must be a rigid pendulum. When impacting a specimen 2 mm thick, the physical impact center of the pendulum must coincide with the thickness center of the specimen.

2. The clamp of the testing machine must not cause the sample to be clamped to break and slide during the test. The clamp claw may have a file-like tooth, and the tooth size may vary according to the sample.

3, the T-shaped head should be made of light and very low elastic material, and plastic deformation will not occur when subjected to impact.

Sample: the sample is made by injection or mechanical processing. Thin film or sheet sample can be cut by punching knife. The phenomenon of overheating of samples is not allowed during sample preparation. If coolant is used in mechanical processing, the performance of the sample shall not be affected. The specimen should be free from damage, with no defects and uniform thickness. The marking of specimen gauge should not affect the performance of the sample. Hard material specimens shall not be twisted. If the tested materials show different tensile impact properties in all directions, they should be sampled in different directions.

Sample size and shape: 1mm is preferred for specimen thickness. The sample cut from the product should be kept at the original thickness; the specimen with a thickness greater than 4mm should be machined to 4mm. For thin films, multi-layer specimens can be used but should overlap well.

Sample size: at least 5 samples or according to product standards.

Select the appropriate pendulum to make the impact energy reading in the effective range of the tester.

(try to choose a small T-shaped head on the premise of clamping the sample).

Impact energy of pendulum J

T-head quality G

Fifteen

Twenty-five

30 + 1 or 60 + 1

60 + 1 or 120 + 1

Calculation and expression of the test results:

1. Calculation of tensile impact strength:

Type 1

W

E= * 1000

D x H

Type: E - tensile impact strength, KJ/m2

W - corrected energy consumption of sample destruction, J

D - the thickness of the specimen is millimeter (mm).

H - the width of the specimen is millimeter (mm).

The test results were expressed by the arithmetic mean of tensile impact strength of each group, and 3 effective figures were obtained.

2. Energy correction

Since the energy Ws consumed by the pendulum impact specimen includes the energy consumed by the T-shaped head flying out, the energy must be corrected to calculate the energy consumed by the specimen failure.

The energy consumed by the corrected specimen is calculated according to formula 2: W.

Type 2

W 'W "

W=

Two

Medium: W - corrected energy consumption of sample destruction, J

W '- the energy consumed by specimen destruction during elastic collision, J

W "- energy consumed by specimen failure during inelastic collision.