JPH06509990A - scraping stick - Google Patents

Abstract

A doctor bar, in particular for dosing coating slips on continuous webs of paper or cardboard or rubber coatings on cylinders, is characterized in that at least the superficial area which forms the doctoring or dosing surface is made of glass or carbon fiber or of plastic fiber(s) reinforced by glass or carbon fiber(s).

Description

[Detailed description of the invention] scraping offering The invention relates to a scraping bar according to the preamble of claim 1. Preferably metal, especially The scraping rods used today, made of steel, are very expensive, especially when colored. subject to wear and tear. This results in high operating costs. Therefore, many development ideas The trend is towards replacing the normally used metals with ceramics (and See, for example, German patent nos. 3839564A1 and 3841.494A1. Akira). Ceramic rods are of course virtually durable, but they are very expensive. , and also can not be manufactured into a good, smooth surface. Roughness that occurs during manufacturing The surface must be smoothed by appropriate reworking at great effort and expense. or when using a new rod, the opposite side, e.g. the product web or It is unavoidable that the metal of the opposite roll rubs against the metal of the opposite roll. This is particularly disadvantageous when working directly on the rubberized surface of the roll.

The challenge is to provide a highly polished material that is relatively cheaply manufactured and has as smooth a surface as possible. The purpose of the present invention is to provide a scraped zelkova with high resistance to damage and surface hardness.

This object is achieved according to the invention by the features of the characterizing part of claim 1.

In terms of strength, very high strength glasses can be manufactured today, and glass fiber The bar (light guide) is very flexible and the safety glass plate (bulletproof glass) is It must be considered that it will not break when it is damaged and that it will be resistant to impact. For example, scratch Sufficient abrasion strength is also possible, as seen in extremely strong watch glasses. glass is a good choice as long as a surface with very slight irregularities can be produced relatively easily. This is the case. Depending on the type of glass, theoretically infinitely long bars can be manufactured using the extruder method. can.

The present invention will be individually explained below with reference to the drawings.

FIG. 1 shows an axial section of a scraping rod according to the invention, FIG. 3 and 4, showing axial sections of other variants, show the scraping according to the invention. FIG. 5, which shows an example of the surface of a bar, shows yet another bar axis as a composite structure. FIG. 6, which is shown in a linear cross-section, shows a support bar with unevenness and a fiber mat. showing a variant having a covering, Figure 7 shows a textured support bar with glass or carbon fibers embedded in the groove. It shows.

One convenient method is to make the wick primarily from other materials such as glass, and then is to install a glass cover device with an original metering or scraping surface on the . One variant is illustrated in Figure 1, where a core made from carbon fiber 13 is shown. 6, which is optionally or for example made of epoxy resin. can be formed into a complex. This core 13 can be provided with a glass layer. Ru.

This figure also shows another circumferential cover made from very thin carbon fibers 14. Illustrated. A very thin glass layer 15 is applied thereon.

The fibers 14, however, are plastic composites made from carbon fibers or glass fibers. It may also be a bundle held in the body.

Instead of carbon fibers, the core can be provided with a metal support. on this metal support The glass is attached directly to the Acrylic glass can also be used as the glass.

Of course, the support 11 made of metal can be replaced with an outer material made of glass by a suitable method. It can also be joined to device 2 (see FIG. 2).

Preferably, adhesive is used in this case, but also an adjustable spring method. Alternatively, the sheath can be shrink-fitted onto the core. Then scrape off the core. When the rod is rotated, it receives torsional forces from the drive.

The peaks and valleys on the surface will be very small, less than 3 μm, preferably only 1 μm. It is m. As shown in Figure 1, if a coil around the core is provided, 1 to 50 Pitch covering can be installed.

The metal core is also made of sintered material, and the support core is also made of plastic. Can be manufactured.

In Figure 3, a cross-section of the surface of an axial scraping rod is shown, which has a corrugated shape. For example, it extends in a sine wave shape).

According to FIG. 4, this surface corrugation also consists of a series of circles with different diameters. It consists of arcs, in which the radius is chosen alternately small or large. These etc. The radius of is preferably between 0.05 mm and 2 mm.

The scraping rod is conveniently manufactured from carbon fiber, but extruder methods are also possible. It is Noh. The glass rod is also preferably pressed substantially circumferentially into the plastic. Stick-like deafness, textured by grinding or milling (Fig. 3 and (See Figure 4). The covering made of glass fibers has a glass rod and a laser as a support. fused by the Zar rays.

Therefore, FIG. 5 shows a metal support rod 16, fixed or directly attached thereto. A glass outer device 7 and a glass fiber covering 20 are shown.

In FIG. 6 a support 22 is shown, which preferably has a circumferential surface similar to a screw. Glass with a groove and plastic embedded around it. Preferably, it is coated with a mat of fibers. The support rod is the support shown in Figure 7. Like the support body 24, it is preferably made of metal. In the case of this figure 7, A similar peripheral groove 25 is provided in which glass, carbon fibers are placed. or fiber bundles, or plastics reinforced with glass fibers or carbon fibers. has been established.

Continuation of front page (72) Inventor Ruhr Friedhelm Steinheim, Federal Republic of Germany D-89555 Ostalbstrasse, 1

Claims (18)

[Claims] 1. Especially on running webs or rubberized rolls of paper or carton products. A scraping rod for supplying a fixed quantity of paint to the scraping surface or a fixed quantity supply. At least in the surface area forming the surface, glass or carbon fiber; Characterized by being made of glass or carbon reinforced plastic fibers scraping stick. 2. 2. A scraping rod as claimed in claim 1, consisting entirely of glass. 3. Claim 1 or 2, consisting of acrylic glass, at least in the surface area. 2. The scraping stick described in 2. 4. Claim provided with a metal support (11) for the surface area (2) of the glass The scraping rod according to item 1 or 3. 5. A carbon fiber support (6) is provided on the glass or carbon fiber surface area (2). The scraping rod according to claim 1 or 3, wherein the scraping rod is scraped. 6. Containers with (external) windings made of glass or carbon fiber (14) in the circumferential direction The scraping rod according to claim 1, 3 or 5. 7. Windings made of glass or carbon fiber are mounted adjacent to each other. The scraping rod according to claim 6. 8. Claim 6 or 6, wherein a glass coating layer is provided on the carbon fiber winding. 7. The scraping stick described in 7. 9. Carbon fibers are bundled within an epoxy resin covering and adhesive; as a helical covering for such a bundle. is the scraping stick described in 6. 10. a metal support (11) and a sheath (12) made of glass, glass or carbon fiber; ) The scraping rod according to any one of claims 1 to 9. 11. A support, for example a metal support (11) and a glass casing (12), are attached to each other. The scraping rod according to claim 10, wherein the scraping rod is bonded. 12. The scraper according to any one of claims 1 to 11, which is formed in a cylindrical shape. rod. 13. up to 20 mm in diameter and made of elastic, flexible, bladed or flat held within a plastic bed (9) held on a plate-shaped support (10). A scraping rod according to any one of claims 1 to 12. 14. A glass rod-shaped elongated support (31, 31') and substantially the surrounding area. In this case, the covering (3) is made of glass fiber covering (32). 2) is fused with the support at the mutual contact area, for example by means of a laser beam. The scraping rod according to claim 1, wherein the scraping rod is combined with the scraping rod. 15. The rod-shaped support or the internal metal core (33) and the metal core (33) the outer hollow cylindrical glass casing (31') connected to the The scraping rod according to claim 14. 16. The glass rod is pressed, preferably plastic, in a substantially circumferential direction. 2. The material according to claim 1, wherein the surface is roughened by polishing or milling. scraping stick. 17. The fiber mat (23) preferably has a support textured by peripheral grooves. According to any one of claims 1, 4 or 5, the support rod is fixed on the holding rod (22). scraping stick. 18. The fibers or fiber bundles (26) are embedded in the grooves (25) around the support rod (24). The scraping rod according to any one of claims 1 to 6 and 8 to 16, wherein the scraping rod is embedded. .