JP2006192415A - Foreign-substance removing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact and energy-saving apparatus using a coulomb force, wherein the apparatus requires conventionally a large installation and a high power, nonmatching to an energy-saving time as the apparatus generates a static electricity by spraying air on a seat and causes the seat to be charged even if a foreign substance can be removed according to circumstances, resulting in attracting the foreign substance in a following step. <P>SOLUTION: The apparatus has an air nozzle 2, an ionizer 3, a brush 6 for causing a conductor 5 to be charged in contact in a polarity opposite to the foreign substance while the foreign substance 9 blew off from the seat 1 is charged to keep a plurality of conductors 5 separated and arranged on a rotatable and nonconductive role 4, and a blade 7 of the conductor carrying an earth function, wherein the foreign substance scraped down from the conductor is dust collected together with air as a solid-gas mixture. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an apparatus for removing foreign matter during sheet manufacturing.

  In the corrugated board manufacturing process, there is a process of cutting the base paper into a required width and length after slitting with a blade after cutting the base paper into a corrugated cardboard sheet or punching it into a box, but at that time paper dust and paper fragments are generated To do. This is inevitable in the current method and does not occur if the cutting of the blade is good, but a piece of paper called whiskers that occur during cutting is rather likely to occur when the cutting is good. These paper dusts and paper pieces are foreign matters in the production of the sheet, and these cause damage to the surface of the sheet or cause deterioration in printing quality.

  Currently, equipment for removing foreign matter such as paper dust and paper pieces is not so effective and is not equipped in most cases, but even if equipped, it can only be sucked, blow air with an air nozzle, or rotate from a sheet surface with a rotating brush. Forcibly sucking and collecting dust after forcibly lifting paper dust and a piece of paper. However, corrugated sheets are wide and produced at high speed, and the paper width is frequently changed.It is difficult to collect dust efficiently, and it is left to such a case when it adheres to the sheet due to static electricity such as coulomb force. This method is not appropriate, the facilities are large, and the required power is large and not reasonable.

  The conventional method of blowing off foreign matter on the sheet with air and sucking it with a higher capacity is considered to be static electricity by blowing air onto the sheet, considering that the air is in a position with a strong positive polarity in the charge train. In some cases, the foreign matter is removed, but the sheet is charged, and the foreign matter is attracted again in a later process, which is a problem. The removal method has not changed since several decades, the equipment is large, the required power is large, and it does not match the age of energy saving.

The basic principle is the same as that of the electrostatic precipitator. As shown in FIG. 1, an air nozzle 2 for floating foreign matter 9 such as paper dust and paper pieces on the sheet 1 from the sheet surface with air and a space charging ionizer 3 for allowing the foreign matter to be adsorbed by Coulomb force are provided. , A plurality of metal-like conductors 5 are separated and arranged on a rotatable non-conductive roll 4, and static electricity is charged by contact charging in order to charge the conductor to a polarity opposite to that of the foreign matter in order to attach the charged foreign matter. A brush 6 for generating is provided, and after the roll is rotated slightly, a grounding function is provided for discharging the conductor, and at the same time, a conductor blade 7 for scraping off the adhered foreign matter is provided, and a conductor is connected by a dust collector (not shown). The foreign matter scraped off from the dust is collected together with air as a solid-gas mixture.
Although the same air nozzle and dust collecting device as in the prior art are provided, the amount of air and the suction capacity are small.

  Using electrostatic force coulomb force, foreign matter blown into the air with an air nozzle is charged with ions generated by an ionizer, and attracted onto a rotating roll that is separated from the surface by multiple brushes and charged with opposite polarity. Then, the blade is scraped off at the same time as the ground, and the solid-gas mixture is collected and air is released into the atmosphere as in the conventional case. Since the foreign matter is adsorbed by Coulomb force, the apparatus is compact, energy saving and efficient.

BEST MODE FOR CARRYING OUT THE INVENTION

Since corrugated sheets are often wide, roll, conductor, and bar type ionizers can handle the entire width of the sheet.

  In the conceptual diagram of FIG. 1, the sheet 1 flows from right to left, and foreign matters 9 such as paper dust and paper pieces are on the surface of the sheet sent from the upstream. The periphery of a non-conductive roll 4 such as a resin is covered with a cover 8 for preventing the scattering of foreign matters and collecting the foreign matters, and positive ions are generated and charged by the ionizer 3 as shown in FIG. When foreign matter is blown away in the space by the air nozzle 2, positive ions are attached to the foreign matter and charged to the positive electrode. The roll 4 for transporting the foreign material to the blade 7 is rotated by a variable speed motor, but the conductor 5 such as metal is not in contact with the surface of the non-conductive roll so as to be charged with a negative polarity opposite to the foreign material and adsorbed. 4 sheets are separated. A resin brush 6 is provided to contact and charge the conductor, and the brush is charged to a positive polarity opposite to that of the conductor. The positively charged foreign matter is charged with the opposite negative polarity and attracted to and attached to the rotating conductor 5 by Coulomb force. When the conductor comes into contact with the grounded blade 7 as it rotates, the charge is instantaneously removed and the adhesion force is increased. And is scraped off by the blade 7. Thereafter, the foreign matter is separated after sucking the solid-gas mixture of air and foreign matter with a small-scale dust collection system which is a conventional type not shown. In the figure, four conductors are provided, and the above is repeated by rotation. The polarity can be changed by changing the material of the ionizer and the brush, and the adhesive force can be changed by changing the output of the ionizer, the material and amount of the brush, the rotational speed of the roll, and the like.

  The equipment is not too big, compact and not very expensive, and the running cost can be reduced compared to the conventional one. There are many corrugated cardboard factories, and foreign matter such as paper dust and paper pieces are generated throughout the corrugated boxing line, so the possibility of use is considered to be extremely high.

  It is a conceptual diagram of this invention.

Explanation of symbols

1 Sheet 2 Air nozzle 3 Ionizer 4 Roll 5 Conductor 6 Brush 7 Blade 8 Cover 9 Foreign object

Claims (1)

  An air nozzle (2) for floating the foreign matter (9) on the sheet (1) from the sheet surface with air and a space charging ionizer (3) for allowing the foreign matter to be adsorbed by Coulomb force can be provided and rotated. A plurality of conductors (5) are separated and arranged on a non-conductive roll (4), and a brush (6) is provided on the conductor for contact charging with a polarity opposite to that of a foreign substance. And a foreign matter removing device on the sheet for collecting the foreign matter scraped off from the conductor together with air as a solid-gas mixture.

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