JPH08103811A - Method and device for removing foreign matter of bar stock - Google Patents

Abstract

PURPOSE: To remove various foreign matters stuck on the surface of bar stock by wiping both surfaces while the bar stock is clamped with rubber wiper and ejecting the air imparted with static electricity on both surfaces of a bar stock. CONSTITUTION: By arranging so that an upper roll 3 is laid right above a lower roll 2 through a bar stock 1, the bar stock 1 is held between the lower roll 2 with rubber wiper and upper roll 3 under weight of upper roll. The foreign matter of dust, litter, etc., stuck on both surfaces of bar stock 2 is intercepted in front of rubber wiper, foreign matter is removed and the bar stock passes through a foreign matter removing device. At the same time the air supplied through an air hose 6 and imparted with static electricity is ejected to three places between two rolls with rubber wiper from an air ejecting hole 7. By this method, the foreign matter piled in front of two foreign matter removing rolls with rubber wiper is removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strip foreign material removing method and a strip foreign material removing apparatus for removing foreign matters from the surface of a strip material, particularly a strip material which is a lead frame material.

[0002]

2. Description of the Related Art A metal strip formed by press working, particularly a strip made of metal to be used as a lead frame material, is manufactured by rolling, and then internal strain, curl and residual Processing such as passing through a leveler (straightening device) is performed in order to remove processing distortion such as distortion.

In order to prevent foreign matter such as dust and dirt from adhering to the surface of the strip during the processing such as rolling and distortion removal by a leveler, winding during and after the processing, various foreign matter is attached. Measures are taken to prevent this, but foreign matter such as dust or dirt adheres to the surface of the strip. If foreign matter such as dust or dust adheres to the surface of the strip material that will be the lead frame material, the strip material may be pressed or scratched when winding or rewinding the strip material. It may cause defective products.

Conventionally, in order to prevent foreign matter from adhering and to remove foreign matter, the strip material is passed through while blowing air from the top and bottom of the strip material, or the traveling strip material is a plate-shaped body around which cloth is wound. Measures have been taken to pinch strips. However, in the prior art, since processing such as air blowing and wiping with a cloth was performed independently, even though foreign matter could be prevented by air blowing, the foreign matter could not be completely removed. In that case, foreign matter is deposited on the cloth, and the foreign matter is caught between the strip and the cloth, which may cause scratches on the surface of the strip. The cloth itself becomes a new source of foreign matter.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a method for removing various foreign substances adhering to the surface of a strip and an apparatus used for the method.

[0006]

The above object can be achieved by providing a foreign matter removing method and a foreign matter removing apparatus for a strip according to the present invention.

That is, for the running strip (1)
At the same time wipe both sides by sandwiching the strip with rubber wiper (2)
A method of removing foreign matter from a strip characterized by blowing air with static electricity onto both sides of the strip, and a means of wiping both sides by sandwiching the strip with a rubber wiper, and a pair of static electricity above and below the strip. It is achieved by providing a foreign matter removing device for a strip material, which comprises:

As a rubber wiper for sandwiching the strip member from above and below, a rubber wiper composed of a rubber hose having a fold on the surface is suitable.

The gist of the present invention resides in that the strip is sandwiched between rubber wipers to wipe both sides, and at the same time, static electricity is applied to both sides of the strip. Further, it is preferable to alternately perform the foreign matter removing method of blowing static electricity on both sides of the strip and the foreign matter removing method of sandwiching them with a rubber wiper to wipe both sides.

[0010]

Embodiments of the present invention will be described with reference to FIGS. However, the description is for deepening the understanding of the present invention and does not limit the present invention.

FIG. 1 is a schematic side view of a strip foreign matter removing apparatus according to the present invention, and FIG. 2 is a schematic view showing a plane arrangement of an upper roll 3 with a rubber wiper and an air outlet 7.

In FIG. 1, two lower rolls 2 with rubber wipers are installed on the lower mount 4 of the foreign matter removing device, and two upper rolls 3 with rubber wipers are installed on the upper mount 5. The upper roll 3 is placed directly above the lower roll 2 via the material 1, and the strip 1 is sandwiched between the lower roll 2 and the upper roll 3 with a rubber wiper by the weight of the upper roll 3. In FIG. 1, a guide 8 is inserted into the upper mounting base 5 and guides the upper roll 3 mounted on the upper mounting base 5 so as to be placed right above the lower roll 2 via the strip 1.

By sandwiching the lower roll 2 and the upper roll 3, foreign substances such as dust and dust adhering to both sides of the strip 1 are blocked in front of the rubber wiper to remove the foreign substances, and the strip 1 Pass the foreign matter removing device.

At the same time as removing foreign matters with two rolls with rubber wipers, as shown in FIGS. 1 and 2, the rolls with two rubber wipers are placed in three places from above and below (that is, a total of six air gaps). The static electricity-provided air sent through the air hose 6 is blown to the air outlet from the air air outlet 7 to remove the foreign matter accumulated before the two foreign matter removing rolls with rubber wipers.

[0015]

EFFECTS OF THE INVENTION With the strip foreign matter removing device of the present invention, foreign matter such as dust or dust adhered to both sides of the strip 1 by the rubber wiper for removing the foreign matter by sandwiching the lower roll 2 and the upper roll 3 Is blocked in front of the rubber wiper, and the blocked foreign matter is removed by blowing air with static electricity. The foreign matter removal process can be continued stably.

[Brief description of drawings]

FIG. 1 is a schematic side view of a strip foreign matter removing device of the present invention.

FIG. 2 is a schematic view showing a planar arrangement of an upper roll with a rubber wiper and an air outlet of the present invention.

[Explanation of symbols]

 1 Article 2 Lower roll with rubber wiper 3 Upper roll with rubber wiper 4 Lower mount 5 Upper mount 6 Air hose 7 Air outlet 8 Guide

Claims (2)

[Claims] 1. A strip which is characterized in that (1) a strip is sandwiched between rubber strips and wiped on both sides of a running strip, and (2) air with static electricity is blown onto both sides of the strip. Foreign material removal method of material. 2. A strip provided with means for sandwiching the strip with rubber wipers to wipe both sides, and air blowing means for spraying a pair of statically imparted air above and below the strip. Foreign material removal device for materials.