Device and method for conditioning the flow surface of the headbox of a fiber web machine

A fiber web machine and headbox technology, which is applied in the paper machine, wet end of paper machine, textile and paper making, etc., can solve the problem that the small grinding wheel cannot meet the smoothness and other problems

Inactive Publication Date: 2014-03-05
VALMET TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Small grinding wheels cannot meet the smoothness requirements

Method used

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  • Device and method for conditioning the flow surface of the headbox of a fiber web machine
  • Device and method for conditioning the flow surface of the headbox of a fiber web machine
  • Device and method for conditioning the flow surface of the headbox of a fiber web machine

Examples

Experimental program
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Embodiment Construction

[0024] figure 1 A part of a conventional headbox of a fiber web machine is shown. Fiber web machines include, for example, paper, board and pulp machines. The fiber suspension used in the production process is fed into the slice channel 11 via a turbulence generator 10 as is known. The purpose of the turbulence generator is to separate the fibers from each other and to guide these fibers in as uncertain a manner as possible relative to each other. Here, the turbulence generator 10 consists of a plurality of tubes 12 which are supported at both ends to solid plates 13 and 14 . Holes 15 are machined in the plate delimiting the slice channel 11 and the tubes 12 have been placed in the holes 15 . exist figure 1 , there are 7 rows of tubes 12 on top of each other, and each row extends across the entire width of the headbox. The tubes 12 are placed at an angle relative to each other so that fluid discharged from different rows of tubes is brought together in the slice opening 1...

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PUM

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Abstract

The invention relates to a device for the conditioning of the flow surface in the headbox of a fiber web machine. The device comprises a frame structure (23) and a conditioning element (24) arranged in the frame structure (23) for the conditioning of the flow surface (25) of the slice channel (11) of a headbox. The height dimension s of the conditioning element (24) is equal to or less than 60 mm. An actuator (26) is also arranged in the frame structure (23) for operating the conditioning element (24). The conditioning element (24) is a grinding disc (36). The invention also relates to a method for the conditioning of the flow surface in the headbox of a fiber web machine.

Description

technical field [0001] The invention relates to a device for finishing a flow surface in a headbox of a fiber web machine, wherein the device comprises: [0002] -Framework, [0003] - a trimming element arranged in a frame structure for trimming the flow surface of the slice channel of the headbox, wherein the height dimension s of the trimming element is equal to or less than 60 mm, and [0004] - An actuator arranged in the frame structure for operating the dressing element. [0005] The invention also relates to a method for finishing a flow surface in a headbox of a fiber web machine. Background technique [0006] In a fiber web machine such as a paper machine, the headbox plays a key role in the continuous web formation. In the headbox, strong turbulence is also created in the fiber suspension by means of a turbulence generator. In the headbox, the vortex generators are followed by a slice channel bounded by a lower lip and a top slice. The dimensions, and especia...

Claims

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Application Information

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IPC IPC(8): D21F1/02B24B1/00
CPCD21F7/00D21F1/028
Inventor 塞波·罗莫
Owner VALMET TECH OY
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