Sharpening unit and cutting machine comprising at least one blade and said sharpening unit

Inactive Publication Date: 2006-01-19
FABIO PERINI SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0017] The object of the present invention is to provide a sharpening unit, in particular although not exclusively for cu

Problems solved by technology

This means that there is often more pressure of the grinding wheels on the blade than necessary and consequently also excessive wear on the blade.
On the contrary, there may be insufficient sharpening pressure, caused by the blade and the grinding wheels not having been moved close enough together.
In th

Method used

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  • Sharpening unit and cutting machine comprising at least one blade and said sharpening unit
  • Sharpening unit and cutting machine comprising at least one blade and said sharpening unit
  • Sharpening unit and cutting machine comprising at least one blade and said sharpening unit

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Example

[0047] FIGS. 2 to 4 show a first embodiment of the sharpening unit 50. In this embodiment idle grinding wheels are used, which are drawn in rotation through the effect of the frictional force exerted during contact between each grinding wheel and the blade 19. The sharpening unit 50 has a pair of plates 55, 57 secured to the rotating unit 17 (or to another part of the cutting machine if this does not have a rotating unit, for example to the supporting frame of a band blade). Between the two plates 55, 57 bars 59 with a circular section extend to form sliding guides for the same number of bushings 61. The bushings are integral with a carriage indicated as a whole with 63.

[0048] The carriage 63 moves along the guides formed by the bars 59 according to the arrow f63 to move gradually against the axis B-B of the blade 19, in order to hold the grinding wheels in the operating position offsetting the decrease in dimension of the blade 19 due to wear caused by sharpening.

[0049] Movement ...

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Abstract

The sharpening unit (50) comprises a grinding wheel unit (80) with at least two grinding wheels (51, 53) opposed to act on two sides defining a cutting bevel of the blade (19). The grinding wheel unit is provided with at least a degree of freedom to center the grinding wheels (51, 53) in respect of a lying surface of the portion of the cutting bevel of the blade (19) on which said grinding wheels act.

Description

DESCRIPTION [0001] 1. Technical Field [0002] The present invention relates to a cutting machine for cutting elongated products, such as and in particular logs of web material for the production of small rolls destined for packaging and sale. [0003] More specifically, the invention relates to a cutting machine with at least a cutting blade and at least a sharpening unit associated with said cutting blade. [0004] The invention also relates to a sharpening unit for cutting machines or other machines provided with a blade that must be constantly or periodically sharpened. [0005] 2. State of the Art [0006] In the paper converting industry rolls or logs of substantial axial length are produced by winding a predetermined quantity of paper, for example tissue paper, to subsequently produce small rolls of toilet tissue, kitchen towels and the like. For this purpose the logs are cut orthogonal to their axis and divided into a plurality of small rolls of a suitable length, which are then packa...

Claims

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Application Information

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IPC IPC(8): B24D15/00B24B3/36B26D7/12
CPCB26D7/12B24B3/368
Inventor CHIOCCHETTI, MARIO GIONIGELLI, MAURORIDOLFI, QUIRINO FERNANDO
Owner FABIO PERINI SPA
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