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Plastic Molding Under Pressure

Plastic molding pressure is softening plastic to a plastic condition in the heating cylinder cars and the subsequent injection under the applied external pressure, hot melt chilled form. After this injection molding to the next stage, in which the material acquires the desired configuration and the material hardens, and the fixed shape of the product. Plastic molding under pressure necessarily require temperature control cylinder shape, which vary depending on the properties of recyclable plastics and plastic injection mode, which provides products with small operating characteristics. Plastic molding takes place at specialized machines, which consist of the following main components: injection, extrusion, drive and control. Casting plastic on this machine as follows. Plastic granular or powder from the hopper enters the boot part of the heating cylinder, a rotating screw is captured and transported over the cylinder in its transverse part. Further, in molding plastics mother, softened by heat from the external heaters and the heat that is released during its deformation in the coils of a screw. Accumulated in front of the cylinder of the melt during casting plastic screw pushes back – there is pressure in injection molding.

Under pressure that develops in the cylinder closure, movable plate extrusion site moves forward and semiform close. Then plastic molding occurs at a force which develops hydraulic cylinder injection, the screw moves forward and becomes the casting of plastic form. Plastic molding at the stage of finding the form be kept for certain period of time under external pressure. At the end of exposure injection molding pressure nozzle is removed from the form.

Delivery Products

Hydrometer ADB-1 is designed to measure the density of drilling and any other solutions, as well as liquids and slurries, neutral to polyethylene. Hydrometer – in physics is the name of the device, which is used to determine the density and hence, the specific weight of bodies. The device is a hydrometer is based on the hydrostatic law (Archimedean law), in which each body is floating in the liquid so deeply immersed that the weight of the displaced fluid is equal to weight of the floating body. Hydrometer looks like the "float glass", a widening at the bottom and filled with steel shot or a special heavy weight (ballast). Devices that measure the density of large, have great ballast. Besides the usual, there are special hydrometers. They are designed for certain types of liquids: alcohol, sugar solution, etc. In such a hydrometer scale is scaled to the weight or volume percentage is determined product.

To determine the relative weight of the liquid, pour it into a glass vessel (cylinder), and gently lowered back hydrometer. Once the hydrometer will take the correct position, counting is carried out by testimony scale. Speaking candidly Newcastle University told us the story. For the amount of weight takes a value against which to set the level of the liquid, assuming that the top or bottom edge of the meniscus, depending on the performance of a hydrometer. The device consists of a hydrometer and a bucket with a lid. Bucket serves as a reservoir for the working of water into which the hydrometer is immersed with the solution. The cover is designed for sampling the test solution. In the hydrometer includes measuring cup, float, consisting of cover and the bottom, rod deposited on its core (from 0,8 to 2,6) and the correction (from 0.2 to -1) scales, and a removable cargo. Beaker has two cavities: for the measured sample solution and the compensation chamber.

In the compensation chamber is placed a metal ballast needed for the stability of the submerged device. Ballast is isolated from the environment plastic flap. Click Dean Ornish M.D to learn more. Provides buoyancy float hydrometer. Bottom of a float designed to delete the excess grout from the measuring cup up to the calculated volume. The rod is made of standard tube and attached to a float. Specifications: Measuring range of density, g / cm – with a calibrated weight: 0,8-1,7 – without calibrated load: 1,7-2,6 Scale hydrometer (main and correction), g / cm 0,01 Operating environment – the water density from 0.96 to 1.039 g / cm at 5 to 50 C Capacity of cup hydrometer, cm 78,5 0,3 Absolute error in temperature of test solution, the environment and water (20 2) C, g / cm 0,01 Delivery Products: hydrometer ADB-1, carrying case, manual.