About us
We provide one of the best-suplied instruments in United States of America, European Union, and Latin America. Our Company Al-Nisa Instruments maintains is a complete inventory of all the instruments in the line, by managing its stock electrOrcially, this permits the shipment of all order witnn days of receipt, while the emergency orders are shipped on the same day of the receipt. Execution of order within 2 weeks if not Ex stock. Our customer service representatives are ready to work with our customers on expediting rush morcMIs.I’, product demonstrations, and consultation. As customer satisfaction is our top priority, we aim to make your experience hassle-free and treat you as our only one.
Manufacturing Process
Most of the surgical instruments go through 28 or more steps before they are hand-inspected, packaged and shipped to our customers. Al-Nisa international has several fully mechanized units capable of producing large volume of Al-Nisa Instruments . Following is brief introduction to some of the major steps in manufacturing instruments .
Al-Nisa Instruments
1) Forging? Stamping This is the first and one of the most crucial steps in the production of surgical instruments. First, pre-cut / fabricated lengths of Stainless Steel Sheet or stock bars are heated in specialized furnaces. When they reach specified temperature. They are instead in forgoing presses where they are hammered in the shape, size, and geometry of the instrument to be produced. The mold/die used in hammer forging is made from high strength die-steel and is a critical component in maintaining tight tolerances in the final products. Once forged, Stainless Steel hardens as it is allowed to cool down quickly at ambient temperature.
2) Annealing Forged pieces of Stainless Steel Are next annealed in vacuum furnaces. These furnaces are typically batch-furnaces where batches of forged instruments are annealed under vacuum to prevent corrosion. Annealing is a process which makes Stainless Steel soft machining This is a slow process where forged pieces are heated to a pre-determined temperature and later allowed to cool down very slowly over a period of time. The cool down stage sometimes take more than 10 hours based on the type of material etc. When annealed properly, the grain structure of Stainless Steel grows to a larger size which allows for easy matching and makes it ductile for forming, shaping , and size in the later stages.
3) Milling / Machining Next the annealed products are machined and milled based on the requirements of the final design. Specialty high-speed cutters are used for introducing teeth, serrations, ratchets, box-joints, etc. Milling machines are equipped with pneumatic clamps which hold the products in place as they are being milled and machined.
4) Grinding / Sizing / Setting Once the products are milled and machined, they are next grinded using high speed medium coarse grinding wheels and belts. This process is used to removes any excess material left in the forging process and also to size the instruments as pre the required tolerances. Once raw shape of the instruments is defined by coarse grinding, highly skilled technicians take the adjoining pieces of instruments and set them together. At this stage, the final shape of the instruments immerses and is bound together using screw or rivets in case forceps and scissors. The serrations, ratchets, and teeth are also aligned and straightened in this step to from the perfect fit. This is one of the most important aspects of hand craftsmanship as it requires years of training before technicians are allowed to work independently.
5) Heat Treatment Instruments when sized and set for perfect fit are next heat treated in highly sophisticated furnaces. Heat-Treatment Furnaces can either be Continuous (belt operated) or batch depending on the volume and size of the instruments. Typically this process is carried in an inert environment (Nitrogen or Argon gas filled to avoid oxidation and corrosion of final product. This is used to harden the annealed instruments to break in operation and lower than permitted hardness prohibits proper operation / cutting of instruments. Typically this process is carried in an inert environment (Nitrogen or Argon gas filled to avoid oxidation and corrosion of final product. This process is used to harden the annealed instruments as per the final requirements. This is also an important step as the hardness of the instruments must be within a few degrees. Excessive hardening causes the instruments to break in operation and lower than permitted hardness prohibits proper operation / cutting of instruments. After annealing as well as hert- treatment, the instruments are tested using Diamond-Tipped Rockwell hardness test fixtures to ensure proper hardness at any given stage of process.
6) Finishing / Polishing Hardened instruments are next grinded (using fine and extra fine wheels and belts) to remove deep scratches from the medium-coarse in the previous stages. This step is also used to size the product as per the requirements. Typical tolerances of # 2 millimeters are achieved at this stage of processing.
Next Instruments are polished as per the final requirements either to a Stain finish (aka Matt / dull finish) or Mirror (shiny) finish.
