minecraft crash after 30s of me being on a server

so this is whats happening i launch the game all nice and fine join a server get in to a game and 30seconds latter it freezes so i do ctrl alt delete and the go back my screen is black and the as soon a i click it gos white and pops up java(tm) platform se binary is not responding. and give me the option to close the program or to wait for the program to respond. have tried waiting but never works so i close it then the launcher pops back up and with the message game crash and so on. i looking in to where its ment to show and keep your crash records but i have bin doing this all day and it has never poped up in the records to day is 7/6/2017 6:31 pm and i was up at about 9:00 am doing this and this has never happened tell now if you guys need to talk more my gmail is [e-mail address removed for security] or just leave a comment