The Bell, known in Sanskrit as the Ghanta/Ghanti is used in all poojas for invoking the Gods. The ringing of the bell produces what is regarded as an auspicious sound. It produces the sound Om, the universal name of the Lord. There should be auspiciousness within and without, to gain the vision of the Lord who is all-auspiciousness.
Another significance of ringing the bell is that they help drown any inauspicious or irrelevant noises and comments that might disturb or distract the worshippers in their devotional ardor (dedication), concentration and inner peace.
Agamaarthamtu devaanaam Gamanaarthamtu rakshasaam
Kurve ghantaaravam tatra Devataahvaahna lakshanam Means:
I ring this bell indicating the invocation of divinity, So that virtuous and noble forces enter (my home and heart); And the demonic and evil forces from within and without, depart.
During Naivedhya or deparadhana, archakas rang the bell to converge all the devotees to the particular shrine. Also, to avoid any unwanted discussions. It is not that only that time, you have to ring the bells. But the purpose they do by that time is to announce everyone inside the temple that pooja is over. Also, when the swami is veiled with curtain, normally we people will start talking or simply chatting, or sometimes they may even went off thinking that the shrine is closed. To avoid all these things, bells are ringing at that time. Even in the entrance doors of shrines, bells will be there. We can ring that too while entering.
So, ringing bells in temples is not a wrong thing I think. But it may sometimes disturb the people doing some meditation or reciting some slokas there. Ringing bells itself is a worship in buddhism. So, nothing wrong in ringing the bell sir. Ofcourse, the purpose is for it only. Ringing the bell gives you sparsha pleasure for hands, seeing its beauty, hearing its om kara thwani (ears). Three-in-one.
Pranams