Cushion Material Test by Dynamic Compression Tester

You also need to know about the charactaristic data of cushion material, when you design the package.
This data is often given from cushion material company, but if there are no data, you can obtain it by cushion tester.

This test is held in order to perform dymamic compression to blockish cushion materials.
In concrete terms, we can measure the acceleration and displacement of the weight by dropping the test weight to the top surface of the material.
Then so, from these test parameters, we can find the cushion material charactaristics as "Cushion curve" from these tested parameter.

If the cushin curve and product fragirity as critical acceleration is recognized beforehand, cushion effect of designed package freight will be optimized.

K.Kawaguchi

Shock Fragility Test by Shock Machine

This test has been carried out to identify the shock fragility charactaristics by the shock machie.

It is very important to know the fragility of packged products to realize the appropriate package design.

If the product has a enough strength shock resistance, fewer cushion materials will be required to design package.

Here, the strength of product is represented as "Damege Boundary Curve" that is constructed by critical acceleration and critical velocity change.

These values are decided by shock fragility test.

"Critical velocity change" represent the resistance to free fall.

"Critical acceleration" value is used to cushioning package design.
All the packages are designed under this value when the drop test is performed.

K.Kawaguchi

Distribution Data Recorder (1)

This time, it's about the importance of the distribution data recorder.

These test intensity, -Drop height and cycle of the drop test, PSD and duration of random vibration condition- is often based on the test regulation like ISO4180, ASTM-D4169 or JIS-Z0200.

However, the intensity on the regulation is not nessesarily equivalent to the actual disribution environment.
If regulation intensity is over the distribution feild, the designed package will be over-packaged since it takes too expensive cost by many cushion materials.

Distribution data recorder has been used to identify the distribution environment to derive the optimal test condition.
It means to realize the opitimal package design.

As you see, to realize the optimal package design is very important and to meet the demand, we have been providing the data recorder, model DER-1000.

K.Kawaguchi

Step of optimal package design for distribution

In distribution, the freight is always encountered various hazards, like a shock event of man-handling, vibration on track board or the static compression in the warehouse.

One of the function of package is to protect the inside goods from various hazards in the distriburion environment.
So, package test has been carried out to evaluate the protectively of package design with some test equipments, such as the drop tester, vibration tester, etc.

Here, the protective package technique is widely known as the way to realized optimal package design.
Concrete steps are as follows,

1)Measurement of the distribution
 To difine the optimal test intensity from distribution hazard data with the distribution data recorder
2)Fragility test of the procuts
 To difine the critical acceleration when the product is broken with shock machine
3)Cushion material test
 To realize the cushion characteristics, such as peak accleration and max displacement of cushion material with the cushion tester
4)Evalutation test for package design toward distribution hazards
 The evaluation of the shock absorb charactarictics by drop tester, confirmation of the vibration resonance using the ocillator and the compression strength of the freight box using the compression machine, etc.

K.Kawaguchi

Introduction

I am Kazuaki Kawaguchi, Shinyei Technology corp. in Japan.

Shinyei Technology, brand name is Yoshida Seiki, produces some test equipments for package freight such as drop tester, shock machine, distribution recorder and acceleration mesurement system.

So, it is very important for us to learn the feild of distribution package.
In this blog, I will write about techniques of distribution package using our equipments.

K.Kawaguchi