Dear Sir,
You can send and no permission is required.
But in that case invoice which will be prepared by your supplier mention your name as a buyer and job worker’s name as consignee. The Hon’ble CESTAT clarified this issue in the matter of Inder Poly Fabs (P) Ltd. Vs. Commissioner of C. Ex., Chandigarh [1998 (99) E.L.T. 420 (Tribunal)].
So, you can send your inputs directly from your supplier to job worker’s place for Job work and you are required to pay central excise duty at a time of clearance of goods from your premises after receipt of the finished goods after job work.