Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

The brick of manual molding differs from the usual technical parameters, as well as unusual coloring and texture. Such products are mainly used for restoration and internal works (facing of furnaces and fireplaces, recovery of old buildings).

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

Production Features and Molding Methods

Production of clay blocks has its secrets. Work on the formation may seem simple, but it is a long and time-consuming process, requiring an exact observance of all stages of work.

For the manufacture use fine clay, well purified from extraneous impurities. It is mined from special deposits, has different colors (white, blue, gray, red). When mixing them in different proportions, manufacturers can achieve any shades. The variety of clay, which no additional additives are required, is considered to be the most suitable for brick production.

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

Brick manual molding need to be made under a canopy or indoors. The sifted clay is diluted with water to the state of a soft tight mass that keeps the form well.

Even before the process of laying in the form master manually begins the formation. Prepared mass on the table with wires cut into pieces. Each piece must have a size corresponding to the form to fully fill it.

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

Brick form is a box with a smooth inner surface. Such boxes are performed from a tree with dense texture, so in the process they are not distorted and do not swell.

Before filling out the shape, the inner part falls asleep with small sand to facilitate the extraction process. Also, the sand helps to achieve the effect of aged brick. After burning, the brick is thrown from about a meter height so that small cracks and grooves appear on the surface, which further enhance the imitation of “antiquity”.

Sliced ​​clay experts recommend with strength to prepared form. So the form will be completely filled, and the quality of the finished product will increase. Do not add the clay mass into the form if it turned out not enough. This will reduce the quality of the brick. When the form is filled, excess clay is cut off with a knife or wire.

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

Then the raw block is carefully removed from the mold and goes on drying. To form the next brick, the form is cleared from clay residues and sprinkled with sand again.Next Stage of Manufacture – Drying. This process is required to remove excess moisture and preparation for burning. Raw blocks after drying should contain no more than 10% moisture. In the drying room it is necessary to maintain a constant temperature, it should be well ventilated. Raw blocks are dried from one to three weeks, it all depends on external conditions (temperature, humidity, etc. D. ). Excess moisture can also be removed by blowing blocks with warm air.

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

The final stage – the firing in a special oven. The calcination occurs in several steps at different temperatures. First, at a temperature of 2000 ° C, heating and removal of moisture residues occur. The temperature is then increased to 8000 ° C, the process of sintering and the formation of a holistic unit begins. After that, the temperature gradually decreases. On the whole process leaves more than 6 hours.

Hand molding brick: Features, Manufacture, Selection Rules

In industry there are two main forming methods:

  • plastic;
  • semi-dry.

With a plastic method, raw blocks are dried before firing for several weeks. If the unit is not enough, then in the furnace it can be redeemned. If this does not happen, the quality of the finished product will still deteriorate significantly.

Many manufacturers accelerate the drying process, trying to avoid cracking the finished products by adding impurities to clay (slate, sawdust, coal). However, a brick made with violations of technology has dark spots on the surface. Such products are poor-quality and short-lived.

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

Semi-dry method began to be used much later. It is considered more economical both in time and in investments. Special drums are used for clay drying. Then from the clay powder knee-lever presses form bricks that can be immediately sent to the firing. This method allows not only to save time, but also to get better products.

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

With manual molding, bricks are made by small batches. The process does not require an impressive investment. In addition, the production technology in small scales is best complied, so blocks are characterized by high strength and durability.

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

Difference from clinker

For the manufacture of bricks manually use special clay grade – Cambrian. For clinker, another variety is suitable, more plastic and fire-resistant. This clay contains little chemically bound water, in comparison with other varieties.

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

Clinker is molded under high pressure and calcined at a temperature of reaching 20000 ° C. The clinker has lime and salt, which ensures strength and prevents the appearance of. Firing at high temperature allows you to get a dense block without cracks and pores, with a smooth and smooth surface.

Walls from clinker well tolerate humidity and sharp temperature differences. Brick, made by hand, can collapse at temperature differences, so it is practically not used in the construction of houses. In this case, due to its operational and mechanical properties, the clinker is considered the most appropriate material.

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

Pros and cons

The main advantage of hand mold brick – high strength. For several decades, he retains its properties and appearance.

Other pluses of brick manual molding:

  • does not miss moisture, leaves the room dry;
  • It has frost resistance, suitable for use in all climatic zones;
  • not exposed to strain and cracking;
  • possesses good sound and thermal insulation properties;
  • It is environmentally friendly.

The minus is its high price, which is associated with the complexity of the process and low productivity (in comparison with factory automated production).

Application options

The brick of manual molding is suitable for facing the pedestals of monuments, facades of buildings. It is used for exclusive design of the premises, finishes of fireplaces, chimney pipes and other interior designs that are heated. It can be put in the door or window opening, you can post them a fence, column, arch, arch, gazebo or bench.

The brick of manual molding at cost significantly exceeds the usual. But at the expense of excellent performance properties, high strength, rich color scheme and unusual texture, he justifies its price. Especially such a brick will appreciate lovers of luxury designs “Under the Starin”.

Hand molding brick: Features, Manufacture, Selection Rules

Criterias of choice

When choosing, you need to consider the following points:

  • sizes must be selected optimally to reduce the amount of waste;
  • It is important to definitely decline in advance;
  • The strength of the blocks should be chosen taking into account the requirements of the project (recommended moisture absorption – up to 10%, the class of frost resistance – F50).

Choosing bricks of a foreign manufacturer, you need to take into account the characteristics inhibited by the manufacturer, as well as climatic conditions in which products can be used.Dutch manufacturers produce bricks of all standard sizes that are suitable for different works – from the construction of houses to facades. In terms of cost, they exceed the analogues, but the parameters speak for themselves: the strength of M100-M300, frost resistance is higher than F100, moisture absorption – from 8 to 10%.

For the terms of our climate, the products of the German company MUHR will suit, which is characterized by high quality.

The advantages of the German brand:

  • a large selection of shades, textures;
  • high class of frost resistance;
  • preservation of properties with high humidity and under the action of direct sunlight;
  • the absence of the risk of embrittlement in the process of use;
  • The presence of only harmless materials.

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

Among Russian manufacturers are “Don Dawns”. For quality, products are most like analogues of foreign manufacturers. The cost of bricks of this brand is lower than the prices of imported products due to the use of domestic raw materials. Products complies with QBicks quality standards.

According to the production standards, the facial ceramic must have the following characteristics:

  • Emptiness – not higher than 48%;
  • compression strength – no less than M75;
  • Frost resistance – no less than F50;
  • moisture absorption – no less than 6%, but not more than 28%

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

Manufacturers

The Russian market consists mainly of imported products:

  • Wienerbeger (Austria) – one of the leading companies, half of the products manufactured in Russia;
  • Nelissen (Belgium) – it differs in that it produces bricks of rare colors, many of which are not from other companies;
  • Lode (Latvia) – Products have a large selection of colors and textures;
  • CRH (Ireland) – a company that first created a brick, which changes the color depending on the lighting (to achieve this effect, not chemical additives are used, and the method of special firing);
  • Klinkerwerke Muhr (Germany) used mainly for restoration works.

Plant “Kerambrac” (Ukraine) one of their first established mass production and began to produce handmade material under the brand of “Ekaterinoslavsky Brick”. Each instance is unique in its own way, since the entire manufacturing process by masters is performed manually.

Trading house “Petrovsky Brick” (Russia) relatively recently began to produce handmade bricks (since 2015). Brick blocks are manufactured in European format, in accordance with all the requirements. The company is constantly expanding its range, manufacturing products according to individual parameters, has a steadily operating dealer network. She has already entered the markets of near abroad.

Hand molding brick: Features, Manufacture, Selection Rules

Hand molding brick: Features, Manufacture, Selection Rules

Read more about manual forming bricks See in the video below.

IN

Rate article
( No ratings yet )
Share to friends
Rebuildhom.info - construction and repair, dacha plot, apartment and country house, useful tips and photos
Add a comment