The characteristics of the solvent-free compound machine can be summarized in one sentence, namely: compact structure, less space, equipment installation and maintenance costs are low, less energy consumption. The manufacturers of solvent-free composite machine structure is basically similar to the principle, is to Italy Nordmecanica solvent-free composite machine as an example for a specific introduction.

This compound machine mainly consists of two unwinding devices, glue device and crimping device. The whole structure is simple, the total length of 4-5 meters. As the key part of the solvent-free compound machine is the glue part, therefore, here on the plastic parts for a specific introduction. For other parts as long as the adjustment of tension (or pressure) can be.

The coating device consists of 5 rollers.

The first two rollers a and b are chrome-plated steel rolls whose surfaces are hard and quite smooth and the two rollers are in the form of a reservoir. Roller groove on both sides of the plastic block material, it can be used according to the width of the composite material to adjust the length of the slot. There is also a narrow gap between the two rollers, the gap is 80μm (gap adjustable, different equipment, the work gap is different), the slit mainly from the amount of plastic metering effect. As the first roller fixed, therefore, when it can play a scraping effect, we call the scraping roller, the second is called the rubber roller or measuring roller.

The third roller c is a rubber roller whose surface is rubber and the roll base is steel. It is mainly to make the rubber on the upper rubber roll and transfer it to the next roll. Therefore, we call it a rubber roller or transfer Roll. Its length determines the composite width of the composite material, for different width of the composite material, to choose the width of the corresponding composite material shorter than about 2-75px rubber roller, so the workshop to reserve a variety of specifications (length) of the Rubber roller.

The fourth roller d is chrome-plated steel, its role is to transfer the glue on the roll to the composite material, which we call the coating roller.

The fifth roll e is a rubber roller, which is made of silicone rubber material.

The composite material through the d, e two rollers, through the roll e on the roller d pressure, the adhesive will be transferred to the composite material. Through the gas control device to control the roller c and roll e and roller b, d between the clutch, so that both easy to replace the rubber roller, but also conducive to the operation of workers cleaning the roller. The pressure of the rubber roller e against the steel roll d can also be adjusted. The roller b is driven by a special low-power motor, which is driven by the main motor. In the course of the work, the rollers b, c, d between the three rollers have a certain speed ratio, Nordmecanica's complex machine is Vd: Vc = 5: 2, Vc: Vb = 10: 1, so when the composite speed of 300m / Min, Vd = 300 m / min, Vc = 120 m / min, and Vb = 12 m / min.

On the glue 5 roll not only have a certain speed ratio, but also accurate calculation of the mutual angle, in order to ensure the amount of glue on the precise and constant.

Two layers of composite material in the roll f and g were pressed, and then by the volume, the whole work is completed. The roller f is also driven by the main motor, the rollers g and the rollers e are made of the same material and the control principle is exactly the same.

In the glue device and the composite device are equipped with a special heating device, respectively, the chrome roll, galvanized steel heating, it is through the steel roller circulating water temperature control to control the roller table temperature, the general maximum temperature is not More than 100 ℃.

The glue is generally divided into two kinds:

1, hand plus glue. For single-component adhesives, as long as the glue can be poured directly into (before the need to go through a period of time to warm up); for two-component, the first weighing ratio, playing even before pouring.

2, the machine automatically into the plastic. One-component adhesives should be driven by a dedicated pump; two-component adhesives will have to set the proportion of the components on the device and then enter.As the composite material in the machine wear film length is short, and the adhesive initial viscosity is low, so in the compound process to precisely control the material tension and winding tension is particularly important, otherwise the compound out of the product easy to produce tunnel phenomenon, especially Is in the start and brake two stages, this phenomenon is more likely to occur.

For glue such as a single component, the glue temperature is higher (about 90 ℃), the glue process is easy to produce "mist" phenomenon, these "mist" will not only stick to some clean areas of equipment, and volatile to the air In the body of the workers are also harmful. Therefore, an air filter (shown in Fig. 1) is provided on the upper side of the upper roller b and the upper roller c. The sponge on the suction port of the device should be replaced in time. Otherwise, over time, the whole sponge pores will be clogged by glue and affect the air filter function, thus affecting the composite quality.

For each roller, with particular attention to their cleanliness, if the hard plastic point on the roller, must not use steel knife scraping, and the application of wood or bamboo scraping. After cleaning the rollers, if the oil on the steel roll on a little oil, can bring convenience for the next cleaning.

Compared with solvent-based compound machine, solvent-free composite machine has the following advantages:

1, solvent-free composite machine compact structure, short body, take up small space, equipment installation and maintenance costs less, so less investment.

2, fewer operators, only an operator and a helper can be a normal boot, so the low cost of personnel.

3, solvent-free composite machine production efficiency, its speed can reach 400m / min, and solvent-based compound machine due to solvent residue constraints, the production rate was significantly lower than the solvent-free compound machine.

4, no drying oven, the whole power is low, so the energy consumption is much lower than the solvent-based complex machine.

The above four points, the cost of solvent-free composite products is lower than that of solvent-based compounds.