JPH0440789Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a liquid draining roll that can effectively absorb and remove droplets adhering to the surface of a continuously running long object.

(Prior art) For example, when processing a long flexible film alone or in a laminate that is continuously run, or when automatically filling a long flexible film with a viscous substance, it is necessary to It is often necessary to dip a flexible film in a processing solution, but if the dipped film is fed to the next process as it is, problems will occur due to droplets adhering to the film surface. .

Therefore, it is necessary to remove droplets adhering to the surface of the film after the dipping treatment before supplying it to the next process. A so-called liquid removal roll is widely known as a device for removing attached liquid droplets. This liquid draining roll is equipped with a porous liquid absorbing layer around its axis, and a long object is sandwiched between the pair of rolls, and while the long object is rotated in synchronization with the running of the long object, the surface of the The liquid droplets adhering to the liquid are removed by being absorbed by the porous liquid absorption layer, and the liquid absorbed by the liquid removal roll is
The porous liquid-absorbing layer is squeezed out by compressing it between the roll axis of the liquid draining roll and a hard roll placed close to the roll axis.

(Problem to be solved by the invention) However, with the conventional liquid draining roll, the liquid absorbed in the porous liquid absorption layer cannot be sufficiently squeezed out by the pressure contact between the liquid draining roll and the hard roll. Normally, only the excess liquid after the liquid absorbed into the porous liquid absorption layer brings the entire porous liquid absorption layer into a state close to saturation due to capillarity. Since the liquid is simply squeezed out, there remains a problem in that it is not possible to satisfactorily remove liquid from long objects.

The purpose of this invention is to advantageously solve the above-mentioned problems, and to propose a drain roll with a novel structure that can always achieve effective draining of long objects.

(Means for Solving the Problems) In other words, this invention provides a thick porous liquid-absorbing layer around the roll axis, and replaces the porous liquid-absorbing layer with a non-permeable material extending in the roll axis direction. This is a liquid draining roll that is divided into a plurality of parts in the roll circumferential direction by a membrane.

(Function) In this liquid draining roll, when compressing the porous liquid absorption layer with a hard roll and squeezing out the liquid absorbed in the porous liquid absorption layer, the capillary action of the squeezed liquid The non-permeable flexible membrane effectively prevents movement in the circumferential direction due to
The liquid that has reached the flexible membrane is almost completely squeezed out, so that excellent liquid drainage is always achieved.

(Example) This idea will be explained in detail below.

Fig. 1 shows a cross section of a preferred example of a liquid draining roll according to this invention, in which number 1 is the roll shaft, 2 is a porous liquid absorbing layer attached around it, and 3 is an impermeable flexible layer. The membrane is preferably an elastic membrane made of rubber, synthetic resin material, or the like. This elastic membrane 3
In this example, two sheets are disposed in the roll axis direction at positions separated by 180 degrees in the circumferential direction, and the porous liquid absorbent layer is divided into two in the roll circumferential direction.

By using a roll having such a structure, effective liquid removal can be achieved as described below.

That is, as shown in FIG. 2, a normal liquid draining device has a pair of liquid draining rolls 4 arranged facing each other, and a hard roll 5 is pressed against the liquid draining roll 4 below each of these rolls 4. Although it is said that the liquid draining roll according to this invention is used, the liquid in the porous liquid absorption layer squeezed by the roll shaft 1 of the liquid draining roll 4 and the hard roll 5 can be further hardened. Since the liquid is squeezed between the roll 5 and the elastic membrane 3, the liquid can be effectively discharged from each divided area.

In this regard, conventional liquid draining rolls do not have an elastic membrane that divides the porous liquid absorbent layer in the circumferential direction, and the liquid squeezed between the roll shaft and the hard roll is distributed throughout the liquid absorbent layer by capillary action. Effective drainage of the liquid was virtually impossible because of the permeation.

In this invention, the porous liquid absorbing layer 2 is made of a foam material, especially urethane foam, and open-cell urethane foam is used as the hard roll, a metal roll or a rubber roll is used as the hard roll, and a rubber film is used as the elastic film 3. are advantageously suited to each.

In addition, in the above example, the case where the porous liquid absorption layer is divided into two was mainly explained, but this invention is not limited to this, and as shown in Figure 3 a, b and c, it is divided into three or four parts. However, it goes without saying that a multi-division structure, even 6 divisions, can be made as necessary.

Below, we will discuss the results of an investigation into the actual liquid draining effect using the liquid draining roll according to this invention and the conventional liquid draining roll, respectively.

As the liquid draining device, the device shown in FIG. 2 above was used.

Further, as the object to be treated, a long package containing a small amount of seasoning before being cut was used. Since the seasonings contained in such packages are supplied at a relatively high temperature, they require cooling immediately after being sealed.

When draining liquid for a long time using each of the above rolls, we found that when using the liquid draining roll according to this invention, the liquid draining effect did not deteriorate at all even after 10 hours of use, whereas when using the conventional roll. When used, the liquid draining effect decreased after only 3 minutes of use, when the porous liquid absorbing layer was almost saturated, and effective liquid draining could not be performed thereafter.

(Effects of the invention) Thus, according to this invention, droplets adhering to the surface of a long object can be effectively removed without deterioration of the liquid removal effect even during long-term use.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a preferred liquid draining roll according to this invention, Figure 2 is a schematic diagram of a liquid draining device incorporating the preferred liquid removing roll of this invention, and Figure 3 is a porous liquid absorbent according to this invention. FIG. 3 is a cross-sectional view of a preferred embodiment of the layer. 1... Roll shaft, 2... Porous liquid absorption layer, 3...
Elastic membrane, 4...Liquid draining roll, 5...Hard roll.

Claims (1)

[Scope of utility model registration request] A thick porous liquid-absorbing layer is provided around the roll axis, and the porous liquid-absorbing layer is divided into a plurality of parts in the roll circumferential direction by an impermeable flexible membrane extending in the roll axis direction. A liquid draining roll featuring the following.