Custom Hypodermic Needle

Manufacturing process

Welding

There are two ways to produce steel pipes, namely welded pipes or seamless pipes. However, welded pipe has advantages over seamless pipe because of its low cost. Raw steel is the main material used to produce pipes here. Pipes are produced by bending cold-rolled sheets or strips produced in coils. It is then rolled into a circle with the help of a plate rolling machine, and then passed under the welding head that melts the edge.

Contemporary manufacturers use filler materials, but do not use filler materials or flux materials here, so that the main composition is always maintained. A weld bend is formed on the I.D and O.D surfaces. The weld area is invisible to the naked eye and can only be seen through microscopic inspection. The weld zone crystallizes in a shorter time and becomes the same as the base metal. It has the same:

1. Appearance and performance

2. Scalability and malleability

3. The same mechanical properties

There are several advantages of welding and drawing pipes:

1. It is easy to identify surface defects before welding

2. Strip steel can be rolled to precise thickness

3. Maintain uniform wall thickness after welding

4. Compared with seamless pipes, welded pipes are cost-effective

Cold drawn

It is a working process that uses tension to stretch metal to the desired shape and thickness. It uses a mold that pulls the pipe through a die with a diameter smaller than the outside diameter of the pipe. When passing through the mold, the inner diameter is controlled by the tool on the inner surface.

Cold drawing reduces the ductility of the alloy and is repeated until the desired size is reached. The pipe is annealed between stretching operations to prevent brittleness and increase ductility.

Bright annealing.

They help to improve the finish of the tube surface. Distortion is minimized and the tube does not require further finishing. In OST, the tube is bright annealed to relieve stress by inputting heat energy. During this process, the material will not scale or oxidize. Any loss of chromium is checked by the bright surface produced by the inert atmosphere in the furnace, without changing the corrosion characteristics.

If you have any questions, please contact us. Our company can produce various customized needles, medical needles, puncture needles, hypodermic needles, biopsy needles, vaccine needles, injection needles, syringe needles, veterinary needles, pencil point needle, ovum pick up needles, spinal needles, etc. If you need customized needle products, please contact us. We look forward to your inquiry! The quality of the products manufactured in our factory will surely satisfy you!

Please contact us if you need: zhang@sz-manners.com