Buffer material packaging impact testing machine

The packaging impact testing machine is the result of years of research and development. Based on the prototype product, it adopts an innovative internal pressure boosting brake slide table and adds product brittleness testing function. Having independent intellectual property rights. We have developedBuffer material packaging impact testing machine. And useVisual C++As a software development platform, a testing system for material buffering characteristics has been developed. After years of continuous improvement, it has become a testing system with stable functionality and performance. The product equipment has been applied to Beijing Institute of Materials Science and Technology, Xiamen Hexing Packaging Company, Zhuzhou Institute of Technology, Xi'an University of Technology, Wenzhou University, Wuhan University of Technology, Zhejiang University Ningbo Institute of Technology, Beijing Forestry University, Tianjin University of Science and Technology, Henan University of Science and Technology and other units.

System functions

according to ASTM D4168-95(2002) Standard Test Methods for Transmitted Shock Characteristics of Foam-in-Place Cushioning Materials Test the cushioning performance of cushioning materials in accordance with GB8167-87 "Dynamic Compression Test Method for Packaging Buffer Materials".

Device Configuration

(1) The body of the impact testing machine

（2）A set of weights

（3）Air compressor or nitrogen gas cylinder

（4）PCI or USB bus 12 bit data acquisition card (PCI2000)

（5）Charge amplifier YE5852A type

（6）Piezoelectric accelerometer CA-YD-103

（7）Test machine control box

（8）Data acquisition and processing software for impact testing of cushioning materials

（9）Data acquisition and processing software for product impact brittleness test

Main parameter indicators

（1）Large impact drop height: 1200mm.

（2）Drop weight: 1-50kg.

（3）Sample size: 200mm x 200mm.

（4）Braking device to prevent secondary drop: air source pressure ≤ 0.7MPa.

（5）Test waveform recording, playback function, and test guidance function.

（6）Automatically fit the high acceleration static stress curve and buffering coefficient curve based on experimental records.

main purpose

(1) Used for dynamic compression testing of packaging cushioning materials.

This testing machine is suitable for dynamic compression testing of cushioning materials for packaging such as block, sheet, or filamentous, granular, and molded parts loaded into compression boxes. According to the experimental method of GB8167-87, the impact acceleration time (G-t) curve can be obtained, and through a set of experiments, the maximum acceleration static stress (Gm - σ st) curve and buffering coefficient curve of the specimen at a given drop height can be obtained.

(2) Used for product brittleness testing.

This testing machine can be used for brittle value testing of small products (<10kg). According to the experimental method of GB8171-87, the impact test is carried out sequentially by changing the thickness of the buffer pad or changing the drop height, and the maximum acceleration value Gm and velocity change △ V of each impact are measured until the product is damaged, and the brittleness value of the product is obtained.

The above experimental process was conducted under the guidance of experimental software, which automatically processes the experimental data and completes the fitting of the required curve.

System features

(1) Using a self-developed speed detector, accurately measure the instantaneous velocity and equivalent drop height at the beginning of the impact.

Due to the inevitable resistance of the slide table during the falling process, there may be a significant error between the drop height and the equivalent drop height. For example, we want to test the cushioning performance of the cushioning material at a drop height of 80cm, but when we actually drop the slide table from 80cm, the instantaneous velocity when it contacts the sample may only be equivalent to the velocity when it falls from over 60cm. In such a situation, if the testing conditions change, the test results lose their significance. So a speed test must be conducted. Our speed testing system, when paired with it, can ensure the repeatability of the equivalent drop height within 1cm.

(2) Reliable collection of impact acceleration time signals can be achieved in any situation.

(3) Providing various FIR digital filters to filter acceleration signals ensures that the signals are not distorted, which is particularly important for studying the mechanical properties of buffer materials and developing new types of buffer materials.

(4) Display the curves of * large acceleration - static stress, buffering factor - * large stress, and dynamic stress-strain in a linear or logarithmic manner.

(5) Provide multiple curve fitting schemes: five point cubic fitting, segmented fitting, and manual fitting. The purpose of the experiment is to obtain the function curve. But fitting curves from some discrete points obtained from experiments is not an easy task. The commonly used five point three order fitting method has significant drawbacks, as the curve is prone to turning and it is difficult to achieve the desired effect. This system provides segmented fitting, greatly improving the fitting function. In addition, a manual fitting method has been specially developed, which is very convenient to use. As long as you point to the original point with the mouse and drag the mouse, the curve will move smoothly, thus obtaining the ideal fitting curve.

(6) Fully automatic file naming without human intervention.

(7) The one graph multi line tool allows you to place multiple curves on a single graph in linear or logarithmic coordinates, providing convenience for studying and comparing the mechanical and buffering properties of various materials under different conditions.

(8) Even if the experiment is interrupted for some reason, the data will be automatically saved, and subsequent experiments do not need to start from scratch.

(9) Press the test report button, and the experimental data will automatically enter the Word version of the test report.

System Application

(1) Design cushioning packaging using the tested * high acceleration static stress curve or buffering coefficient * high stress curve.

(2) When developing new cushioning materials, the impact acceleration time curve, dynamic stress-strain curve, high acceleration static stress curve or buffering coefficient high stress curve obtained from testing are used to study the mechanical properties, cushioning performance, and their relationships of the materials.

(3) The buffer material production factory provides customers with various grades and densities of buffer materials with high acceleration curves and buffer coefficient curves under various test conditions.

(4) Analysis and improvement of the cushioning performance of the original transportation packaging, design and improve cushioning packaging.

(5) The experiments designed for experimenters include: analog-to-digital conversion and data acquisition, dynamic compression performance of buffer materials, analog filtering and digital filtering, and curve fitting of discrete data.

New features

JR-2010-001Buffer material packaging impact testing machineAdded measurement and analysis functions such as initial velocity, velocity variation, and impact spectrum. The redesigned software further enhances data analysis and processing capabilities.

（1）A brand new experimental interface with a more user-friendly experimental orientation function.

（2）Hardware triggers data collection. Measurement of final velocity of impact table drop. Software analysis of displacement time curves, large deformations, and impact spectra during the dynamic compression process of buffer test materials.

（3）It can be upgraded to a 16 bit acquisition card according to user requirements.

More practical functions for impact measurement

（1）The length of impact data collection is continuously adjustable.

（2）The data acquisition filtering coefficient is continuously adjustable.

（3）Secondary filtering function, with continuously adjustable upper cutoff frequency.

（4）Waveform capture, original data recovery.

（5）Initial velocity correction of dynamic compression displacement curve.

（6）Shock spectrum analysis of the selected resonant oscillator's natural frequency.

（7）The curve fitting process with polynomial order and experimental data averaging method can be selected, and experimental data points can be displayed or not displayed as needed.