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ProductTitle: Strap Retention Machine(Dynamic)
ProductModel: HT-6018-A
Category: 84 *
Email: hongtu@lab-tester.com
CompanyName: Dongguan Hongtu Instrument Co.,Ltd
Phone: +8613553813526
Fax: +86076987889150
Characteristic: Dynamic Retention system testing equipment /Helmet strap tensile strength testing machine

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Dynamic Retention system testing equipment /Helmet strap tensile strength testing machine 

 

 

Purpose 

With certain initial load apply on the helmet strap system for a certain length of time, then with a certain weight weights fall from certain height and make the impact force also applied on the strap system, thereby to judge strap system’s resistance tensile performance

 

 

The Main Technical Specifications

Product Name Dynamic Retention system testing equipment /Helmet strap tensile strength testing machine
Testing standard ECE R22.05, IS4151 etc testing standard
Function It's used for helmet strap tension strength testing
Rise device Pneumatic rise device
Initial load 15kg
Impact weight 10kg
Impact height 750mm
Displacement sensor High accuracy displacement sensor catch the data
Control software  HT-6018 special computer softeare conrol rise, down and data calculus
Report format Word , Excel, PDF,JPG etc format
Data display Computer with real time curve display
Electricity 220V 50HZ

The Main parts of helmet retension system testing machine
 

NO Parts Name
1 Fixed helmet support
2 Testing machine frame
3 Displacement recorder4
4 Drop release device
5 Falling weights
6 Guides
7 Anvil
8 Servo motor
9 Cylinder
10 Limit device
11 Computer and Control software

Testing Procedure

1. The helmet shall be positioned 

2.In this position the helmet shall be held  at a point traversed by the vertical axis passing through the centre of gravity of the headform is equipped with a load bearing device aligned with the vertical axis passing through the centre of gravity of the headform and with a device to measure the vertical displacment of the point of application of the force

3.A guide and arrest device for a falling mass shall then be attacheed below the headform, the mass of the headform so equipped in this ways shall be 15±0.5kg, this produces the preloading on the retention system for determiniing theh position form which the vertical displacment of the point of application of the force hall be measured

4.The falling mass of 10kg±0.1kg shall then be released and shall drop in a guided free fall from a height of 750mm±5mm

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