A shoe consists of sole, insole, outsole, midsole, heel, and vamp (upper). They are the basic parts of a shoe that are mostly included in all types off shoes. Other parts of a shoe are lining, tongue, quarter, welt and backstay. These parts are included as per the design of the shoes.
Sole: The exterior bottom part of a shoe is the sole.
Insole: The interior bottom of a shoe, which sits directly beneath the foot, is its insole. They can be removable and replaceable too. In some of the shoes, extra insoles are often added for comfort, health or other reasons, such as to control the shape, moisture, or smell of the shoe.
Outsole: It is that layer of the shoe that is in direct contact with the ground. These can be made of various materials like leather, natural or synthetic rubber etc. Often the heel of the sole is made from rubber for durability and traction and the front is made of leather for style. Special purpose shoes often have refined modifications, for example, athletic cleats have spikes embedded in the outsole to grip the ground,dance shoes have much softer or harder soles.
Midsole: The layer that lies between the outsole and the insole for shock absorption, is the midsole. Some special shoes, like running shoes have other materials for shock absorption, that usually lie beneath the heel where one puts the most pressure down. Materials used for midsoles depend on the shoe manufacturers. Some shoes can be made even without a midsole.
Heel: The rear part at the bottom of a shoe is the heel. It supports the heels of the feet. Heels of a shoe are often made from the same material as the sole of the shoe. It can be high for fashion purpose or for making a person look taller. They are also flat for comfort and practical use.
Vamp, or upper: The upper part of a shoe that helps in holding the shoe onto the foot is the vamp or simply called the upper. This part is often embellished or given different styles to make shoes attractive.
Shoe Making Process
A footwear company has mainly four departments in which a progressive route is followed for producing finished shoes. These are- Clicking or Cutting Department, Closing or Machining Department, Lasting & Making Department, Finishing Department and the Shoe Room.
Clicking or Cutting Department
In this department, the top part of the shoe or the "upper" is made. The clicking operative is given skins of leather, mostly cow leather but not restricted to this type of leather. Using metal strip knives, the worker cuts out pieces of various shapes that will take the form of "uppers". This operation needs a high level of skill as the expensive leather has to be wasted at the minimum level possible. Leather may also have various defects on the surface such as barbed wire scratches which needs to be avoided, so that they are not used for the uppers.
Closing or Machining Department
Here the component pieces are sewn together by highly skilled machinists so as to produce the completed upper. The work is divided in stages. In early stages, the pieces are sewn together on the flat machine. In the later stages, when the upper is no longer flat and has become three-dimensional, the machine called post machine is used. The sewing surface of the machine is elevated on a post to enable the operative to sew the three dimensional upper. Various edge treatments are also done onto the leather for giving an attractive look to the finished upper. At this stage only, the eyelets are also inserted in order to accommodate the laces in the finished shoes.
Lasting & Making Department
The completed uppers are molded into a shape of foot with the help of a "Last". Last is a plastic shape that simulates the foot shape. It is later removed from the finished shoe to be used further in making other shoes. Firstly, an insole to the bottom of the last is attached. It is only a temporary attachment. Sometimes, mostly when welted shoes are manufactured, the insole has a rib attached to its under edge. The upper is stretched and molded over the last and attached to the insole rib. After the procedure completes, a "lasted shoe" is obtained. Now, the welt- a strip of leather or plastic- is sewn onto the shoe through the rib. The upper and all the surplus material is trimmed off the seam. The sole is then attached to the welt and both are stitched together. The heel is then attached which completes the "making" of the shoe.
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