Journey For Hope

Selection of injection molding In this paper we consider the following equipment which may be required during the manufacture by injection molding Step 1: To start you need to determine the type of desired product, choose the right material on the various parameters and properties. Develop a design, as well as design and technical documentation for the product, taking into account manufacturability, ask gnezdnost molds and so on. After the initial phase is finished, you can move on. Step 2: Selection of injection molding. First, you need to know how many injection molding machines required. To do this, simply need to know that this production – is manufacturing smooth type that can work round the clock, only occasionally interrupted for maintenance.

Number of equipment are defined as follows as follows: the annual / monthly plan output, as well as range of our products. Products can be produced at different injection molding machines, and you can just change the mold for one. Thermoplastics are choosing to the following parameters: 1) locking force is calculated by the formula: F = P * S * N, where F-locking force injection molding machine, P-specific pressure of the melt inside the mold, S-area projection products, N-number of nests of the mold . 2) The mass or volume determined by the mass injection of tpa product form a mass of runners, the type of material, screw diameter. Direct dependence of the diameter of the screw on the volume of injection and the theoretical mass. 2) The distance between the columns by information provided, you can easily pick up molding themselves..

Engineering staff required extensive knowledge of the theory, design and research methods of exploiting these mechanisms and systems. The widespread introduction of the hydraulic actuator in deck machinery led to the following Classification: First group – pumps, hydraulic drives and fans, the second – deck machinery. The first group provides the effect of different purpose ship's systems, including the main power plants. The second group is steering gears, anchor, mooring and lifting devices. Marine steering gears – the most important mechanisms for control of the vessel. The importance of appointing servo makes special requirements to their reliability. Steering gears on smaller vessels carry a hand-driven, in large marine vessels primarily with electro. Ship's anchor and anchor-mooring arrangements ensure the formulation and removal of the vessel with anchors and mooring of a vessel to the pier.

This ship's equipment performed manually operated on smaller vessels, with steam, electric and hydraulic, on larger vessels. Ship lifting devices divided into cargo winches and cranes. Their purpose is to provide cargo operations at loading and unloading of marine vessels for general purposes. Ship cranes are more convenient and productive for processing of general cargo. Ship's winches can also raise the heavyweights in the presence of heavy arrows and the corresponding rigging. Also establish special winches, for example, for raising and lowering ship's boats and bridges. By lifting mechanisms include container ships and cranes, lifts, elevators and conveyors for loading and unloading of bulk cargoes.

Represent a special group of towing winches, flexible in relation ship with a tugboat. Marine Equipment lifting can have a steam, electric, hydraulic and manual transmission. classification of pumps for an operates on the principle of pumps are divided into: 1) a volume, 2) hydrodynamic action, and 3) jet. By displacement pumps primarily include piston pumps, in which the reciprocating motion of the piston provides flow of fluid in the discharge line. Rotary gear, vane pumps and many other works on the principle of the piston. To the pump hydrodynamic action include hydraulic pumps, having as the main body of the rotating impeller equipped with blades. The blades are putting pressure on the fluid transfer her energy, direct current. These pumps are in the direction of fluid flow are divided into the centrifugal bias-centrifugal and axial. To this group belong and vortex pumps have received in recent years a significant share of sea transport vessels. In jet pumps energy is supplied along with the flow Working water or steam. In such pumps the potential energy of the flow of seawater (messages in any pressurized pump) or a pair of potential energy is converted into kinetic energy in the nozzle. Therefore, the workflow enters the suction chamber device with high-speed carries (drain) water or gas from this chamber, and the mixed flow through a diffuser enjoys outside the unit in discharge line. For marine pumps in according to their purpose, must meet certain requirements Register of Russia, concerning both the design of pumps and their drives and their parameters, flow and pressure.