The company provides hydraulic accumulator solution and replacement for prominent die casting companies.
Hydraulic fluid is compressed with high pressure into a pressure vessel filled with gas (usually nitrogen). The hydraulic fluid compresses the gas and is available as “stored energy” at a later point in time. Gas and hydraulic fluid are usually separated from each other by a separating element like a diaphragm or piston. This is to avoid that gas from combining with the fluid and also that gas escapes when the hydraulic system is depressurised. Pressure accumulators provide high volume flow in the hydraulic control systems for a short while. Pump volume flow can be kept low because only the average volume flow required is supplied. Accordingly, the capacity of the drive unit can also be kept at a low level thus allowing for increased overall efficiency.
Application in Die Casting
Die casting machines mostly use pressure accumulators for driving the plunger and/or charging the casting metal with pressure. By opening the shot valve, the drive piston of the casting unit is charged with pressure moving the casting piston in the shot chamber. After the die casting mold has been opened, the drive piston is retracted by reverse charging of pressure, and the initial pressure is built up in the pressure accumulator. Many die casting machines are equipped with a so-called intensifier, an additional pressure accumulator which multiplies the pressure at the end of the casting process by means of a larger piston.
Thus, an adequately high end pressure or additional compression can be provided. Pressure accumulators in die casting machines are used for the casting drive, and in particular for the high acceleration of the casting piston from slow forward mode to quick mold filling. On the one hand, drive energy is permanently available, on the other hand, the stored energy can be immediately provided by connecting a pressure accumulator. The pressure gas presses the hydraulic fluid into the drive cylinder of the casting unit and expands in this process. In order to avoid that this volume increase causes significant pressure losses, one or more pressure gas bottles are usually added downstream of the pressure accumulator so that the total available pressure gas volume is relatively high.
The Solution
We at Neotech provide replacement and new solution for die casting industries’ requirement for hydraulic accumulator through our principal PARKER – OLAER, (USA). We provide cost effective solutions based upon our customer’s needs. Olaer utilises comprehensive tools and resources including an applications database, CAD, finite element analysis, reliability studies and simulation software which enable us to optimize design and performance. All this theory is backed up by physical testing, such as fatigue testing of the pressure envelope and wear tests on our sealing systems with a variety of fluids and at extreme temperatures. Our solutions range from 0.075 litres capacity to 160 litres. Capacity accumulators available in diaphragm, bladder and piston type construction with max pressure ratings up till 550 kg/cm2 (bar). We are providing regular replacement to Zitai make die casting machine to prominent die casting companies across the country.
Neotech Equipments Pvt Ltd is situated in New Delhi and we deal in all types of hydraulic accumulators, bladders and accessories; filteration, separation and chip management systems; hydraulic job clamping solutions; manual clamping solutions; high pressure hydraulic tools and accessories; maintenance tools for rotary components; vibration reduction solutions; precision inspection and metrology equipments; and material handling and storage solutions.
(Communication provided by the management of the company)