Hydraulic presses are devices which use hydraulic cylinders for the purpose of generating force. The output of hydraulic presses is equivalent to that of mechanical levers. The hydraulic press concept is derived from Pascal’s theory. The theory holds that upon application of pressure against fluids in a system that is enclosed, pressure generated in the entire system is always constant i.e. pressure remains unchanged throughout. This simply means that hydraulic presses are machines that apply pressure employed against fluids in the crushing of materials. Hydraulic press was invented by Joseph Bramah. This is why it is often referred to as Bramah Press.
Functional qualities of Hydraulic presses
Bearing in mind that Pascal’s law is the principle behind hydraulic presses, the functions of this machine are comparable to those in a hydraulic system. Hydraulic presses contain basic components typical of any hydraulic system. The components include hydraulic pipes, pistons, and cylinders etcetera. The press functional qualities are simplistic. Hydraulic presses contain 2 cylinders. A fluid which often is oil is put inside the cylinder with a smaller diameter. This cylinder is referred to as ‘slave cylinder.’
This cylinder has a piston which is pushed in order to compress fluid contained inside. The fluid moves through pipes connecting this cylinder to a larger cylinder. This bigger cylinder is referred to as ‘Master cylinder.’ Pressure exerted on larger cylinder alongside the attached piston causes the fluid to travel back into slave cylinder.
The force exerted on slave cylinder produces an even bigger force when exerted against master cylinder. Hydraulic pressure generated in the process is often useful in industrial application where large amounts of pressure are needed for functions such as metal compression. Hydraulic presses used for industrial applications utilize material that required to be pressed alongside press plates which punch or crush materials into smaller sheets.
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Hydraulic presses types
Different hydraulic presses are used for different purposes. Here are some.
Laminating Presses-These types of presses use manual labor to operate unlike other hydraulic presses. They do not use much pressure to produce the desired output. They have 2 opening referred to as plates. Both have different functions, one for heating and the other for cooling. Laminating presses can quickly laminate polymers against metal or paper surfaces. Plates are often heated using electricity or oil.
Arbor Presses: They are often used to execute duties that are not heavy in nature. These hydraulic presses do not employ much pressure for desired output in comparison to industrial hydraulic presses. They often are used for making holes on metals, flattening metals, marking inscriptions and stamping.
Pneumatic presses: Relative to other hydraulic presses, these are a basic type for industrial purposes. They often use air to generate pressure for movement. They are advantageous in that they perform operations much faster although they cannot generate high pressure like other hydraulic presses would. They are used in aircraft and car braking systems. Some of their industrial use includes punching, drawing and assembling.
Assembly presses: These use extreme pressure from hydraulic fluids in the maintenance and assembly of parts.
Power Presses: They are applied in big industries requiring heavy equipment and machinery. Power presses can be of two distinct types. There is the part and the full revolution power presses. Due to the magnitude of operation involved power presses are quite dangerous. Safety precautions have to be taken while operating them.
Other types: H-Frame and C-Frame Hydraulic presses etcetera.
Processing cocoa beans: Chocolate liquor is extracted from coca beans through squeezing. Hydraulic presses are used for this purpose. The liquid is processes further to make cocoa powder.
Crushing of cars-Car crushing system is often hydraulic driven. Large pressure is applied against vehicles.
Sword making: The objective of using hydraulic presses during sword making is to flatten raw metal for a perfect sword.