China mug suppliers : Manufacturing technology of round and square ceramic mugs

 From Xinxiang Ceramic Mug Manufacturers,The most common ceramic mug is round inside and outside, but there are many ceramic mugs with inner circle and outer side or ceramic cup with inner circle and inner side. Is the molding process different between the inner and outer ceramic mugs?

All ceramic mugs, as long as they are inner circle, can be made by machine pressing, and as long as they are inner square, they must be made by grouting technology.

The conventional custom ceramic coffee mugs with inner circle conforms to the basic structure of rolling head to press the product, so it can be made by mechanical pressing. The molding rate of press products is high, it is not easy to change and the production efficiency is high.

For the inner products, the machine pressing process can not suppress the square structure in the cup, so it can only be made by grouting process. But the grouting process is a pure manual production line, so the production efficiency is very low, and the product variant is higher than the machine press molding process.china ceramic mug suppliers

Therefore, the products of inner side are more expensive than those of inner circle products. The high price lies in the labor cost and the loss of defective products.

China ceramic mug manufacturers : Various raw materials for ceramic coffee mugs (2)

 From Xinxiang Ceramic Mug Manufacturers,Porcelain clay is metamorphosed by mica and feldspar, in which sodium, potassium, calcium, iron, etc. are lost, combined with the change of water, which is called "Chinalization" or "KAOLINIZATION". Although there is no definite conclusion on the cause of the porcelain vitrification in the academic circles, it can be roughly considered that the feldspar was metamorphosed by the action of hot springs or water containing carbonic acid gas and the gas produced by the decaying plants in the marshland. This may be the reason why porcelain clay usually occurs near hot springs or lime beds. The melting point of porcelain clay is about 1780 degrees. In fact, the melting point of porcelain clay is slightly lower because it contains impure substances.

Pure porcelain mugs custom clay (kaolin) stock is not much, and the so-called pure porcelain clay, is not as strong as clay viscosity. Generally speaking, if the porcelain clay is observed under a microscope, most of it has a white silk like luster and glittering silver. It is a very small crystal. This is the so-called pure porcelain clay. In addition, it also contains the fragments of unmodified feldspar, quartz, iron ore and other rocks as the source of porcelain clay.

The composition of pure porcelain clay is SiO2 46.51%, Al2O3 39.54%, H2O 13.95%, and the fusibility is 1780 degrees.

The most advanced of custom ceramic mugs is porcelain. Which rock is the best for porcelain? Because porcelain must be white. As a result, we have to try our best to avoid the iron content which can make the ceramic coloring. The rocks with less iron content but mainly composed of silica and alumina are granite, granite porphyry, quartz porphyry, quartz trachyte and the hydraulic rocks formed by the disintegration of these rocks.

The granite and even quartz trachyte mentioned here (that is to say, in igneous rocks, it also contains more silica and alumina, but less iron molecules). They are mainly quartz and feldspar, and contain some mica and black green or black brown minerals rich in iron (iron oxide). If you look at the rocks carefully, you can see many transparent grains like glass and bright white or reddish grains like porcelain. The former is quartz and the latter is feldspar. Although the chemical compositions of the four rocks are the same, different rocks are formed because of the different sizes of feldspar and quartz. The granite is composed of relatively large grains (1 ~ 7 mm in diameter). Quartz trachyte is a kind of small grains of quartz and feldspar in the compact plain where no particles can be seen. Granite porphyry and quartz porphyry are between the two. They contain large grains of quartz in a compact plain. The difference in the structure of these rocks is mainly due to the length of time from molten magma to cold setting, in which granite is the longest, quartz trachyte is the shortest, while granite porphyry and quartz porphyry are cold solidified in the time between the two. The main reason is that ceramic raw materials are not completely melted at high temperature like rocks, and the required cold setting time is shorter, which is the biggest difference between natural rocks and artificial rocks, namely ceramics. Sometimes things with the same composition as quartz trachyte flow to the ground in a molten state and then suddenly freeze, so as to form glass without quartz, feldspar and other particles visible to the naked eye like the above-mentioned rocks, but form all the same glass, namely obsidian and barite. It can be seen that the essence of rocks and custom disney ceramic cups is the same, only the difference between natural and artificial.

In granite, there are many kinds of silica, such as semi granite and pegmatite granite. The grains of feldspar and quartz in the former are fine, while those in the latter are formed by extra large grains of feldspar and quartz. Some of them concentrate the same material in some parts and become pure quartz vein, or pure feldspar vein, and some are transformed into semi granite (in some places, the original semi granite is used as ceramic raw material).