Rebound resilience testers

The ZwickRoell 5109 Rebound Resilience Tester

The rebound resilience tester

For tests on elastomers and rubber to DIN 53512 (elastomers and rubber); ISO 4662 (rubber); BS 903 Part A8 Method B (rubber); ASTM D7121 Method B (Schob)
For tests on foam materials to DIN 13014 (polyether foam hospital mattresses).

Advantages & Features

Function description

The objective of tests on elastomers and foams is the straightforward and fast measurement of material elasticity. One material that is up to 100% elastic stores supplied energy and releases it at the moment the force is no longer applied. In contrast, material that is up to 100% plastic absorbs supplied energy completely. These characteristics are used to measure rebound resilience:

Advantages

Instrument equipment/details

Resolution 0.06 degrees.
Extremely low-maintenance - fully automatic sequence with geared motor as sole actuator.
Frictionless pendulum encoder.
Wear-free mechanism - ideal for continuous operation.
Dustproof keyboard.
Stand-by mode and LCD display for low power consumption.

Operation

Menu-guided operation.
Pendulum height is easily adjustable via an eccentric with the help of a setting program.
Included in the instrument are two test programs for determining oscillation time and friction.
The required standard can be selected or the sequence configured.
Multiple languages can be programmed (English, German plus one freely assignable language).
Connection to a PC and to ZwickRoell's testXpert testing software is possible. ZwickRoell testing software offers comprehensive data transfer options (from instrument to PC) plus evaluation, processing, documentation and storing of test results.
Integrated routine enables rapid error analysis.

Specimen tempering

The specimen plus interchangeable clamping fixture can be temperature-conditioned externally in a heated chamber.

The specimen clamping fixture is attached to the instrument base by means of a plug fastener, enabling rapid changes. This reduces temperature losses from the temperature-conditioned specimen during insertion into the tester.

A specimen holder with a temperature control unit for a temperature range of up to 100°C that can be electrically heated is available for tests at high temperatures.

PC connection

A PC can be connected via the integrated RS232 C interface for output and processing of test results.

The ZwickRoell testing software provides options for evaluation, documentation, storage and data transfer. It can also apply and process measured values from various devices (e.g. pendulum impact testers, thickness measuring instruments, balances etc.).

Technical Overview

Item No.	324802	324804
Description	Rebound resilience tester for testing elastomers and rubber	Rebound resilience tester for testing foam materials
Specimen dimensions
Specimen diameter	Ø 28 ... 50	-	mm
Length of specimen	28 ... 50	80	mm
Width of specimen	28 ... 50	80	mm
Thickness of specimen	0 ... 15	50	mm
Distance from specimen holder to striker	0 ... 60 (stepless adjustment)	0 ... 60 (stepless adjustment)	mm
Pendulum potential energy	0.5	0.2 (Pendulum 1), 0.196 (Pendulum 2)	J
Pendulum striker, hemispherical	Ø 15	- (Pendulum 1), Ø 30 (Pendulum 2)	mm
Rounded end	-	R_K= 40, Cyl. Ø = 40 (Pendulum 1)
Pendulum length	L_red = 200	L_red = 200	mm
Pendulum mass	0.252	-	kg
Apparent deformation energy density	426.5	-	kJ/m³
Angle of fall	90	90	°
Impact velocity	1.98	1.98	m/s
Display	2-line LCD	2-line LCD
Dimensions
Height	330	330	mm
Width	450	450	mm
Depth	230	230	mm
Approx. weight	51	51	kg

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An impact testing machine is used to determine the resistance of a material or component to a rapid load under varying temperature conditions. The ZwickRoell product line includes pendulum impact testers for metals and plastics and drop weight testers with an energy range of only a few joules up to 100,000 joules.

to Products for Impact Testing