Manufacturing Process Of Refrigerator
The outer cabinet is formed through a process of folding and sealing sheet metal. Once the correct shape has been made, the edges are either welded or clinched. Clinching involves crimping the two pieces together. Welded joints can be ground to make the joins disappear, so that the final cabinet has the appearance of being formed from a single, continuous piece.
The outer cabinet and door, made of sheet metal, are either welded or clinched together. While some manufacturers also use sheet metal for the inner cabinet, some manufacturers and some models use plastic for inner liners. The plastic liners are made by vacuum forming. In this process, a thick piece of plastic slightly larger than the finished part has its outer edges clamped and is then heated. The hot plastic is next pulled by vacuum into a mold and cooled. After trimming, the resulting part is ready for assembly.
In some models, the inner cabinet may be made of sheet metal in the same fashion as the outer cabinet, however the majority of refrigerators now have plastic interiors. The inner door, for example, is almost always formed from plastic. The plastic interior of a refrigerator is made using a process called vacuum forming. Large sheets of plastic are heated until soft, then pulled into a mould using a vacuum. Once cooled, the components are trimmed and fitted. Vacuum forming allow the interior to be formed as a single component with no joints, making it a very hygienic solution.
Once the cabinet is complete, the refrigeration components – that is, the compressor, evaporator, condenser and other components – are installed. These are typically fitted with the use of screws and clips. Copper tubing is used to connect the cooling system together.
Seals & Handles
Finally, the door seals and handles are fitted. The door seal or ‘gasket’ is typically formed with magnets inside to allow the door to seal fully when closed. The gaskets are screwed into place or fixed with a strong adhesive. The handles and hinges, which may be made of plastic or metal, are then screwed to the door and final calibration takes place to ensure smooth operation
An important part of the manufacturing process is leak testing. This is usually first conducted using the relatively safe gas Nitrogen to ensure that the system is completely sealed. If no leakage is detected, testing will then take place with the final refrigerant.
Production manufacturing estimate cost of Refrigerator
Product cost = Direct material cost + Direct labour cost + Manufacturing cost
Product cost = 2000 + 1250 + 2800
Product cost = 6050 ₹