Categorization of filling and packaging machinery:
Filling machinery due to different forms of packaging containers, packaging materials and filling process, there are many ways to categorize. More common:
According to the measurement method: material level filling machine, quantitative filling machine, weighing filling machine;
According to the filling method: atmospheric pressure filling machine, negative pressure filling machine, isobaric pressure filling machine, pressure filling machine;
According to the form of container transfer classification: linear filling machine, back to the transformation of the filling machine.
Which:
A, atmospheric pressure filling machine
At atmospheric pressure to fill the liquid material into the packaging container machine. It is only suitable for filling low viscosity liquid materials without gas, such as milk, soy sauce and daily chemical products. Can be adapted to packaging containers made of various materials, such as glass bottles, plastic bottles, metal cans, plastic bags and metal drums. Volume quantitative, filling by gravity, material loss is small. Atmospheric filling only requires an unsealed reservoir, for containers and filling valve does not contact the atmospheric pressure filling machine can be used electronic weighing filling machine; for containers and filling valve contact and sealing the atmospheric pressure filling machine is often used to control the level of the level of the exhaust level filling machine or dosing cups, pistons and other quantitative filling machine.
Two, negative pressure filling machine
Negative pressure filling machine is the first packaging container pumping to form a negative pressure, and then fill the liquid into the packaging container machine. According to different filling methods, negative pressure filling machine is divided into differential pressure negative pressure filling machine and gravity negative pressure filling machine.
Negative pressure filling vacuum adjustment should be appropriate, because the vacuum is too high may cause deformation of soft packaging (such as plastic bottles); vacuum is too low, the filling valve mouth and exhaust pipe wall of the liquid and air bubbles can not be sucked back, resulting in liquid dripping. Negative pressure filling machine filling speed is high, can reduce the liquid and the container residual air contact and role, is conducive to extend the shelf life of certain liquid products, suitable for good fluidity of non-gas-containing liquid filling, drinks containing vitamins, toxic pesticides and chemical reagents.
(A) differential pressure negative pressure filling machine
Differential pressure negative pressure filling machine is a liquid storage tank at atmospheric pressure, only the packaging container pumping to make the formation of negative pressure, relying on the pressure difference between the liquid storage tank and the packaging container will be filled into the packaging container liquid filling machine. The machine must make the liquid storage tank and vacuum gas chamber separate, there are mainly double chamber (a liquid storage tank, a vacuum gas chamber) and three chambers (a liquid storage tank, two vacuum gas chamber) differential pressure negative pressure filling machine.
(B) gravity negative pressure filling machine
Gravity negative pressure filling machine refers to the liquid storage tank and packaging containers are pumped to make the formation of negative pressure, the liquid rely on self-propelled filling to the packaging containers within the machine. This type of machine can not set up another vacuum chamber, with a vacuum pump directly to the liquid tank pumping.
Three, isobaric filling machine
Isobaric filling machine is the first to the packaging container inflatable, its internal gas pressure and the gas pressure in the reservoir cylinder is equal, and then fill the liquid into the packaging container machine.
Four, pressure filling machine
Pressure filling the most commonly used form is the product is pressurized, and the overflow tank is connected to the atmosphere. The machine does not need a bottle holder, the use of card bottles pre-positioned filling, there is no need for liquid storage tanks, just in the filling turntable there is a dispenser, one end of the dispenser is connected to the pump installed in the liquid storage tank, the other end of the hose is connected to the various filling valves. There is a ring-shaped positioning ring installed on the filling turntable, the positioning ring has an equal number of curved positioning slots with the filling valves, the center line of the positioning slots and the center line of the valves coincide with the center line. When the PET bottle is transported to the filling turntable, the bottle is dial to the bottle neck pre-positioned to the arc positioning slot, hanging in the filling turntable on the ring positioning circle, at this time the center of the bottle that is the center of the filling valve with the center of the filling valve coincide. Filling valve in the rotary with the filling turntable along the cam down, sealed with the mouth of the filling container and then open the top of the filling valve, began to feed liquid. The pump in the reservoir through the dispenser on the filling machine to supply liquid to the container, filling until the container is full; the gas in the bottle as well as the residual liquid after filling the full mouth will be returned to the reservoir by the return gas (liquid) pipe. The liquid level in the filling container is adjustable, determined by the volume of the valve tube extending into the bottle mouth.
Pressure filling machine is mainly used for non-gas beverages (such as mineral water and pure water), spices, pesticides and some low viscosity liquid plastic bottle packaging. Mainly full mouth filling method, that is, by reaching into the bottle mouth of the valve tube volume to control the liquid level, its liquid level accuracy is higher; the infusion bottle, bottle punching, filling and sealing are used to card bottle neck operation, not subject to the size or shape of the container container limitations, that is, the quality of the bottle (especially the thin and thick wall of the bottle) does not require high and fast filling speed, so it is very suitable for large-scale water beverages production.