1、 Product Introduction

This machine is used to check the brittleness characteristics of plastic shells and vulcanized rubber of wires during low-temperature testing. Soak the sample fixed on the testing device in a low-temperature medium for 5 minutes, then use a punch head to impact the test piece at a dry speed of 2 ± 0.2m/s, and finally check whether the test piece has cracks, fissures, small holes, and whether it has completely separated into fragments at the lowest temperature.

Adopting a two-stage compressor for rapid cooling and refrigeration, the minimum temperature can reach -70 ° C (if the temperature needs to be lower than -70 ° C, liquid nitrogen can be connected to the backup heat exchanger interface, and the minimum temperature can reach -120 ° C). High temperature controllability, the liquid heat transfer medium in the low-temperature tank can be stirred by a motor to achieve better temperature uniformity. Each test can test 4 sets of samples, and the automatic rotating positioning fixture performs impact testing on each set of samples to check the lowest temperature at which brittle failure occurs.

2、 Technical parameters

Product specifications: GB/T 15256-2014、ISO 812-2017、GB/T 5470-2008、ISO 974-2000、ASTM D746-2014、ASTM D2137-11(2018)、JIS K6261-2006、BS 903 A25-1992