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| vacuum packaging machine |
The time relay on the vacuum packaging machine usually uses two, one to control the vacuum time, usually 30S or 60S; the other is to control the heat sealing time, usually 5S or 6S. There are three common types, one is JS14A-y type external type, the body is installed on the electric circuit board, and the adjustment knob is installed on the operation panel; the other is the turntable type, the body is installed on the operation panel, and the body has a large Turntable; In addition, there is a digital display, installed on the operation panel, 0-99S for vacuum, 0-9.9S for heat sealing.
Two transformers are usually used, the smaller one is used to control the transformer, input 380V, output 220V to provide control loop working power supply, output 6.3V to provide indicator light power supply. Larger ones are heat-sealed transformers, generally 400W for 400 packaging machines, 600W for 500 packaging machines, 380V input (220V for a small number of single-phase power packaging machines), and generally 20-36V divided into five gears, one gear 20V The heat sealing current is the smallest, and the five-speed 36V heat sealing current is the largest.
There are usually two AC contactors, one controls the operation of the vacuum pump and the other controls the operation of the heat-sealed transformer. The general working voltage is 220V and the working current is 10A. Because the working voltage of the control loop is 220V, the working voltage of the coils such as time relay, vacuum solenoid valve, AC contactor and counter are all 220V.
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Vacuum packaging machines, including food vacuum packaging machines, are composed of a vacuum system, an air-filling sealing system, a hot-press sealing system, and an electrical control system. The external vacuum packaging machine automatically seals the packaging bag after it has been evacuated to a low vacuum. Due to the high vacuum in the bag, there is very little residual air, which inhibits the proliferation of bacteria and other microorganisms and avoids the oxidation, mildew and corruption of the items. At the same time, for some soft items, after being packaged by the automatic vacuum packaging machine, the packaging volume can be reduced, which is convenient for transportation and storage. The principle of the desktop vacuum packaging machine is to use plastic composite film or plastic aluminum foil composite film as packaging material. It is suitable for solid, liquid, powder, paste food, food, food, fruit, pickles, preserved fruits, chemicals, electronic originals, precision instruments, Rare metals, etc. are vacuum packed or vacuum packed.
