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In most aluminum, wood and pvc windows use windows. Glazing – consists of two or more glasses, tightly connected to each other by means of remote frame, as well as internal and external sealants, which form a closed cavity filled with dried air or inert gases. Manufacture of insulating glass consists of several operations: Originally produced glass cutting, for it is used snc automatic tables, large manufacturing firms or simple tables (for businesses with a small amount of production, they cut the glass manually. At the second stage, washing windows, to do this with the help of vacuum suction glass is placed on the feed compartment of a washing machine and the output control compartment obtain clean dried glass. At another location production cut spacer, with a special saw and fill it vlagopoglatitelem (molecular sieve). Learn more at: Rogers Holdings. Vlagopoglatitel dehydrate the air trapped inside the glass, and eliminates the possibility of condensation between the glass panes. Next on the circuit formed spacer applied butyl sealant (primary pressurization), using an extruder butyl or paste butyl tape, cord, where the firm is expensive to buy an extruder.

Further, the frame with sealant placed between the glass, and construction is glued and pressed by a panel press for large industries or manual crimping press for a small production. In the next stage is applied external sealant (secondary sealing), usually with the help of the extruder. Exterior Sealant is a flexible two-or polysulfide sealants or single-Hotmelt sealants. The so-called "bottleneck" glass – it's marginal zone (Contour contiguity of glasses to a remote frame). Due to non-compliance with technology in the marginal zone can first be formed cracks or chips, which are hidden in the finished glazing sealant, but they both wedges are break the glass, breaking it. The second reason for the destruction of glass, which starts from the edge, is the local temperature tensile stress and pressure drops. To compensate for the stresses in the marginal zone required sealant with high modulus, which is well perceived tensile forces. Consequently, the application of sealant on the basis of a two-component putty is preferable, because significant disadvantage one-component sealants should be considered to soften when heated under the influence of solar radiation.

An important factor in the quality of produced glass is glass. In accordance with the properties of glass and area of its application window is divided into groups – the brand. First, you must understand that different brands of glass goes from one line. At the output is controlled, and if the glass meets the quality mark M1, it is put into box labeled M1, if – M2, then in a box labeled M2, etc. Eight grades. The lower figure in the brand of glass – the higher its quality, fewer defects per unit area, the better and more responsible design it can be osteklyat better its physical and optical properties. The highest quality glazed glass constructions made usually of polished glass window 2,0 – 6,0 mm mark M1.

Plastic molding is an operation in which the molten polymer material is poured into a special mold, where it hardens and takes the required form. Plastic molding is performed using special equipment – injection molding machines. They heat the workpiece, the material is poured into a preset shape and cooled finished product. Construction equipment used in injection molding, has a close relationship with the properties of polymers used. Injection molding capabilities to meet the indicators such substance used as the temperature of its processing, the transition to a plastic condition, viscosity of the solution, particularly freezing. In injection molding is extremely important to consider all these features, as well as other parameters characterizing the polymer. For example, the range of melting temperatures should be such that to ensure uniform melting and casting quality plastic, but it does not have a devastating effect on the structure of matter.

In addition, molding plastics should consider how the transition occurs in liquid state. For example, polystyrene is characterized by a smooth transition, and polyamide and polypropylene, by contrast, change their properties dramatically, abruptly. One of the items of equipment, construction of which depends on the properties of a substance used in injection molding – a screw. He is responsible for plasticizing the polymer and provides the starting material in the form below. For the correct casting plastic is necessary that its design is taken into account nature of the transition of matter in the fluid state, its thermal stability, sensitivity to shear stresses.

Knowing the temperature at which the molding of plastic, it is necessary to calculate the level of heating cylinder. It is important to note that what is already a range of melting temperatures, the more accurate should be calculated, because in this case, even a slight deviation from the established regime violates molding plastics. On features transition in a plastic condition depends on the depth of the channel metering, particularly the nozzle and the tip of the screw. Many of the design parameters are determined by thermal stability of the polymer used in molding plastics.

How to correctly select a voltage regulator? What is needed voltage – single phase or three phase? Do I need to put some voltage to different consumers, or better put one at all? What power is required voltage? The answer to these and many other questions can be found in our article! The main characteristic is a voltage stabilizer of the connected load. It is based on This option will select a particular model. Please keep in mind that the power of the stabilizer should be equal to or slightly more power to the instrument for the protection of which it is intended. Thus, calculating the capacity of all devices that need protection to ensure that we can easily determine which model is the voltage regulator is needed in this case. You can, of course, without going into lengthy calculations, purchase stabilizer maximum power. However, such a model would be costly, and whether it makes sense to install this stabilizer, whose power will be used only by 15-20%.

It is very important to remember that some appliances are starting currents, several times higher than the nominal currents. It is typical for devices with asynchronous motors in the circuit, such as refrigerators, pumps, and therefore the stabilizer for such devices must choose from two – three-time power reserve. How to protect a large number of appliances simultaneously, such as in your office? Must take into account several factors: first, as organized layout voltage in the building, ie how it will be convenient to embed a common single-phase or three phase voltage or more separate stabilizers to the already existing Electricity and secondly, as a rule, one big regulator, equal in power to several individuals, is cheaper.