KR900007941Y1 - Nip pressure control equipment of doctor blade for paper making machine - Google Patents

Abstract

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Description

Nip Pressure Spacing Device of Doctor Blade for Paper Machine

1 is a roll and doctor installation of the paper machine.

2 is a cross-sectional view showing a coupling structure of the first portion A portion.

3 is a partially separated perspective view of the device of the present invention applied to part A of FIG. 1.

4 is a plan view of the device of the present invention.

* Explanation of symbols for main parts of the drawings

1: Doctor body 3,3 ', 3 ": Small upper holder

5: Doctor blade 6,6 ', 6 ": Carding lower holder

7: Bolt 9,9 ': boundary

10: Adjustment screw

The present invention relates to a doctor blade for a roll constituting a paper conveying line, and more particularly, to a nip pressure gap adjusting device of a doctor holder supporting a doctor blade. to be.

As shown in FIG. 1, the roll R constituting the paper P conveying line of the paper machine is used with a well polished surface. Since the surface of this roll has a tendency to be contaminated by the stake and pitch etc. from the conveying paper P, the doctor blade B is installed in order to remove it.

Usually, the doctor blade B has a lower holder (B) at the holder TH at the end of the doctor body D such that its tip always contacts the surface of the roll R but is inclined approximately 20-30 ° with respect to the tangent passing through the contact part. In addition to BH), install it.

Thus, the doctor blade (B) is inherited as the upper and lower holders (TH) (BH) as if picked up with tongs. The conventional upper and lower holders have a single body length, that is, a wide plate shape. Due to the tolerances, their nip pressures have disadvantages that the overall length is not uniform and finely uncontrollable. For this reason, it is difficult to maintain the precise parallelism of the doctor blade (B) which relies on them, so that the tip is uneven, leaving grooves or scratches on the surface of the roll (R).

Since the upper and lower holders each have a single full length body, it is almost impossible to finely adjust the nip pressure intervals of the full length. It is also not easy to have them in the first place to have very precise dimensions and parallelism.

However, by splitting the plate-shaped upper and lower holders into several pieces, each of the nip pressure intervals can be finely adjusted and can be equally adjusted as a whole.

An object of the present invention is to provide a device capable of adjusting the fine nip pressure gap of the doctor blade to solve the problem that the tip of the doctor blade is uneven and leaves grooves or scratches on the surface of the roll.

Referring to the configuration of the device and its working effects in detail as follows.

The device of the present invention is applied to the normal doctor body and the doctor raid as it is. However, the upper and lower holders, which are fastened to the end of the doctor body to support the doctor blade, do not form a single body with respect to the battlefield, and are composed of pieces that are divided into several pieces.

3 and 4, the small piece upper holders 3, 3 ', 3 ", which are split into several pieces on the normal doctor body 1, the front end jaw 2, are arranged side by side with a plurality of bolts 4, respectively. The ordinary doctor blade 5 is also fastened with bolts 7 or 8 together with the small piece lower holders 6, 6 'and 6 "which are also divided into pieces. The upper holder and the lower holder, which are split into small pieces, are arranged such that their boundary portions 9, 9 ', 9 "are shifted from each other.

On the other hand, each of the small piece upper holder (3) (3 ') (3 ") is a combination of several sets of adjustment screw 10 is to be adjusted so as to adjust the parallelism of each other.

The characteristics of the device of the present invention is that the upper and lower holders buried in the rear of the usual doctor blade (5) is divided into a plurality of facet upper holder (3) (3 ') (3 ") and facet lower holder (6) (6 ') (6 "), the bolts (7) fastening them can be adjusted individually to partially adjust the nip pressure gap at the rear end of the doctor blade (5), so that even if a deformation or dimension error occurs, You can do it.

On the other hand, the remaining fine nip pressure adjustment can be adjusted more precisely by adjusting the parallelism with the other adjustment screws 10 coupled to the ends of the small piece upper holder (3) (3 ') (3 ").

Since the boundary portions 9 and 9 'of the upper and lower holders do not coincide with each other and are shifted from each other, the relative error is prevented during each minute nip pressure adjustment.

As described above, the device of the present invention enables the minute nip pressure interval of the doctor blade to be adjusted, unlike the conventional device, which only depends on the dimensional accuracy, so that the tip of the doctor blade contacting the roll surface can be uniformly contacted. Therefore, there is an effect that can solve the problem of grooves or scratching the surface of the roll by the doctor blade.

Claims (1)

In the conventional doctor blade mounting structure in which the doctor blade 5 is fastened together with the lower holder to the upper holder at the end of the doctor body 1 so as to contact at an angle to prevent contamination of the roll surface, the upper and lower holders are divided into several pieces. It consists of a true small piece upper holder (3) (3 ') (3 ″) and a small piece lower holder (6) (6') (6 ″), and their boundary portions (9) (9 ') are shifted from each other, and the small piece upper holder is (3) A nip pressure adjusting device of a doctor blade for a paper machine, characterized in that an adjustment screw (10) is respectively coupled to the ends of (3 ') and (3 ").