DE2247798B2 - SQUEEGEE - Google Patents

Description

The invention relates to a squeegee roller with a nonwoven-based jacket.

Roller bodies for squeezing units usually consist of solid rubber, with the roller body made of rubber is attached to a steel core. Solid rubber roller bodies are mechanical only little stressable. A high level of wear must be expected. It is therefore already have been proposed to produce roller bodies from nonwoven fabric, with nonwoven fabric disks axially on the Steel core are pressed on. Such nonwoven rolls can usually be subjected to high mechanical loads take up. However, the only disadvantage is the low elasticity of the roller body. Roller bodies that both high mechanical stresses and the z. B. for squeezing works in the Nonwoven fabric production having desired elasticity have not become known up to now.

In the case of a squeegee roller with a jacket based on nonwovens, it is now proposed according to the invention that that the jacket consists of a rubber and / or plastic-reinforced fleece, which is inclined in strips is wound on the steel core in such a way that the individual layers cross each other, the surface is smoothed.

The nonwoven strips expediently consist of rubber-friendly synthetic fibers which are longitudinally oriented according to a preferred embodiment.

In the manufacture of the roller body (winding roller) a nonwoven web z. B. made of fully synthetic fibers by dipping in a bath with dissolved gum paste or with a suitable rubber-friendly Soaked in plastic. Both sides of the nonwoven web prepared in this way are made with the help of a multi-roll calender pressed with unvulcanized rubber layers or coated with plastic. This penetrates the unvulcanized Rubber or the uncrosslinked plastic completely pores the fleece web, so that later after Cross-linking creates a fiber-reinforced rubber or plastic band. The one that is still unvulcanized rubber-reinforced or non-crosslinked plastic-reinforced fleece web is in the form of narrow strips at an angle from Wrapped layer to layer on a steel core. The roller body constructed in this way made of rubber and / or plastic armored Nonwoven web strips are then vulcanized or crosslinked. Then it is made to measure. Centricity and smooth surface turned or ground.

The figure shows a perspective view of the winding roller according to the invention.

The roller body 2 is attached to a Siahl core 1 and consists of crossed layers of rubber and / or plastic-reinforced nonwoven web tires 3

example 1

A 140 g / m ² longitudinally oriented fully synthetic fiber fleece, e.g. B. made of polyester fiber 3.3 to 17 dtex, length 60 or 80 mm, soaked in a padder with a mixture of polyurethane dispersion (/. R PU latex KA 8065 VP from Fr. Bayer. Leverkusen), dried at 15O ⁰ C, 3 condensed 18G min./ ° C, final weight of 200 g / m ^2, fiber: binder = 70: 30. The web thus produced is cut into webs for example 100 mm and edge to edge at an angle of z. B. 50 wound with seam overlap in 2 layers on the roller body, at the same time a polyurethane impregnation takes place, that is, the freshly set adduct (polyester / Desmodur / Desmophen) is applied with a crosslinker (e.g. glycol) at 120 ° C on the fleece. Ratio = fleece: PU = 1: 3.

This roller is then ^{crosslinked at 110 °} C. for 48 hours. Then the roller body is made to measure. Centricity and, depending on the intended use, the surface is designed by turning or grinding.

Example 2

A 100 g / m ² longitudinally oriented fully synthetic fiber fleece (e.g. nylon 6.6 to 20 dtex, length 60 or 80 mm) is placed over a card, in a padder with a latex dispersion (e.g. Bunatex VP = butadiene / styrene / vinylpyridine latex combined with Vulkadur T = resorcinol resin - 80/20 from Bayer, Leverkusen) impregnated, dried at 150 ⁰ C, condensed rViin./180°C 3, final weight of 167 g / m ^2, fiber: binder = 60th : 40.

The fleece is then made into a paste in a rubber solution and / or ^{rubberized with rubber sheets with a m 2} weight of 800 to 1000 g on a multi-roll calender. The vulcanized rubber penetrates the pores of the nonwoven web in a completely homogeneous manner. The fleece thus produced, reinforced with unvulcanized rubber, is then cut into, for example, 10mm strips and placed end to end at an angle of z. B. 40 ° wound layer by layer on the steel core. The resulting roller body is then vulcanized in an autoclave for 4 hours at 143 ° C. Then the roller body is designed to size, centricity and, depending on the intended use, the surface by turning or grinding. The rubber mixture for acid- and chemical-resistant media must be set accordingly.

Example 3

A 300 g / m ² randomly laid metal fiber fleece, e.g. B. brass-plated steel fiber 150 μ, 50 or 60 mm length laid ^{, solidified in a flat belt dryer at 240 0} C, due to the addition of binder fibers. (Steel fiber: polyamide binding fiber 70:30). The fleece is then made into a paste in a rubber solution and / or gummed with Guinmi films with a m ² weight of 100 to 1500 g on a multi-roll calender. The unvulcanized rubber penetrates the pores in a completely homoic manner

the metal fleece web. The so produced, with tm-vulcanized Rubber-reinforced steel fleece is then used in /. B. 20 mm tracks cut and butt to butt at an angle from Z. B. 60 ° layer by layer wound on the steel core. The resulting whale core is then vulcanized in an autoclave for 4 hours at 143 ° C. After that, will the roller body made to measure, centricity; and ever nutn Intended use The surface is designed by turning or grinding.

1 sheet of drawings

Claims (3)

Patent claims: 1. Squeegee roller with a jacket based on nonwovens, characterized in that the jacket consists of a rubber and / or plastic-reinforced fleece, which is slanted in strips the steel core is wound in such a way that the individual layers cross each other, the surface is smoothed. 2. squeegee roller according to claim 1, characterized in that the nonwoven fabric strips rubber-friendly synthetic staple or continuous fibers are constructed. 3. squeegee roller according to claim 1 or 2, characterized in that the fibers in the Nonwoven strips are essentially longitudinally oriented.