Standing: Technology and process features

Heating of stands and matrices can be carried out by: a) steam or water, which are passed through voids or pipes laid in the body of the matrix or stand; b) electricity – incandescent wires laid in the body of a matrix or stand; c) warm up with steel tires concrete at the working surface of the matrix or stand, with connecting to different phases. The current passes through the freshly laid concrete of parts with less electrical resistance than the concrete of the matrix, and releases heat into the concrete mixture. It is important to use reliable materials to observe safety.

Thermal processing of products is carried out mainly by sharp steam, for which wiring from perforated pipes and flexible hoses is arranged from the steam line. At the stand there are grooves and reception hatches for removing condensation water. Steam from the premises is removed by supply and exhaust ventilation, and the opening of the gate of the workshop is equipped with air heat curtains.

With a stand scheme, in all cases of molding of various kinds of hollow elements of their void can be used to start steam.

Elements with a thickness of not more than 150 mm are recommended to be heated only from below and cover with caps or tarpaulin, and massive elements are steamed with sharp steam in the chambers, while the floor heating is not required.

In winter conditions, elements should be simultaneously heated from below and steam.

When thermal processing of products, concrete cooling rate should not exceed 20-25 ° per hour. The removal of products from the stand and sending them to an open warehouse are allowed with the difference in the temperature of concrete and air not more than 35 °.