Needle blow method

The needle blow method Is also used for squeezed canister handles. A separated blast chamber Is necessary so that no filling material can sediment (environmental protection). It Is therefore Important that the area where the needle enters Is less and regularly stretched to ensure clean, reproducible production. 

A manufacturing method predominately used by the thermoplastic industry for the manufacture of hollow components, also used for thermosetting rubber. The polymer is forced against the inside of the mould surface by gas pressure applied either by a hollow needle or by the decomposition of a blowing agent. 

In the intratracheal administration a polyethylene tube previously filled with DDT powder was inserted through a large needle directly into the trachea. The powder was expelled by blowing air through the tube with a large syringe. The other methods of administration were an oil solution in a capsule direct into the rumen, an oil solution direct into the jugular vein, or pelleted alfalfa hay which was exposed before harvest. 

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