After drying the rough edges of the dried articles are removed and this process is called towing. Special dust hoods are used for this operation where in rotating wheels are provided. The operator places the article on the wheel and rotates by holding a pad of nylon which removes the seams or unwanted sharp […]

In ceramic manufacturing, drying operation plays a very major and important role. Inadequate drying can lead to substantial losses and hence good drying facilities are of the greatest importance in the manufacturing of ceramic clay wares. The invention of new modern machinery has made faster rates of production and greatly improved outputs possible .
The present […]

Throwing and Turning is a special production technique used for making special articles. In this method the articles are made by throwing the plastic body on a potter’s wheel and subsequently finished in leather hard condition in a lathe by turning. This process is also used for making some cups where a ‘foot’ can not be […]

In the next stage the mould along with cast moves on the conveyor for required time so that the cast get hardened and contracted sufficiently to enable it to be removed from the mould by hand and put into a dryer. The empty mould is then moved back through the conveyor via a dryer for […]

Thickened slip besides being difficult to pour and flow in the intricate parts of the mould can trap air bubbles giving pinholes in the cast. The casting time or slip holding time for earthenware body varies from 20 minutes to 40 minutes. The slip is poured into the mould left for casting to happen to […]

The filter pressed body cake is mixed with required quantity of water approximately 35%. Small addition of deflocculants like sodium silicate and sodium carbonate is added to from a fluid slip which can be easily poured into the moulds. The casting process involving removal of the slip should be maintained very high without compromising on […]

Where the shapes are intricate and difficult to make by jiggering and jolleying, slip casting process is the best solution available. Depending on the size and shape the casting moulds are made into different parts to form the final shape. The mould making for these processes are a special technique and consist of various stages. […]

Now a days fully automatic machines are available where in plastic body is spread by a heated electric die over the mould and then finished off by rotating under a profile while being sprayed with water. In the roller machine the roller spreads the clay on the mould to the required shape using an electrically […]

The following methods are followed in shaping of tableware in earthenware industry.
1. Jolleying and jiggering
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In the next stage the cakes are transferred to a de-airing pug mill attached with vacuum chamber. The cakes are fed into the pug mill through a hopper, get pugged, simultaneously the entrapped air from the cakes is also removed by vacuum process. This improves the plasticity and workability of the final plastic body. It […]