Device and method for cleaning, activating or pre-treating workpieces by blasting carbon dioxide snow

A dry ice frost and pretreatment technology, applied in chemical instruments and methods, explosion generating devices, manufacturing tools, etc., can solve the problems of high investment and operating costs, damage to the surface of the substrate, etc., and achieve improved cleaning effects, less logic costs, and improved The effect of cleaning quality

Active Publication Date: 2008-02-13
CRYOSNOW GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conversely, using CO 2 Excessively large particle diameters can damage the treated substrate surface during particle blasting
In addition, investment and operating costs are too high from an economical application point of view

Method used

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  • Device and method for cleaning, activating or pre-treating workpieces by blasting carbon dioxide snow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 2

[0048] In order to increase the vortex mixing in the third area 12 of the mixing chamber 1 and even improve the injection efficiency, a mechanical installation fitting 18 is provided on the inner circumference of the gas delivery pipe 3 and / or the pipe 4 extending into the mixing chamber 1, which makes the gas flow 2 is in a helical rotation / vortex state, and even stabilizes the airflow.

Embodiment approach 3

[0050] In order to increase the temperature of the gas flow 2 and thus the spraying efficiency and to reduce liquid condensation on the workpiece surface 17 , a heating device 19 is integrated with a temperature sensor in the gas delivery line 3 upstream of the pipe 4 extending into the mixing chamber 1 .

[0051] Implementation mode 4 / 5:

[0052] In order to increase the spraying efficiency and / or to achieve certain properties of the surface after cleaning, pretreatment and / or actuation, the propellant metering system 20 is metered in the gas delivery pipe 3 before the pipe 4 which projects into the mixing chamber 1 The fixed propellant particles and / or water droplets metered by the liquid metering system 21 and / or the corrosion inhibitor are preferably phosphates.

Embodiment approach 6

[0054] In order to increase blasting efficiency and / or to achieve certain properties of the surface after cleaning, pre-treatment and / or actuation, water droplets and / or corrosion inhibitor, preferably phosphate and / or immobilized blasting agent particles, are directly passed through delivery system 22 Introduction into the mixing chamber, preferably into the first region 10 or the second region 11 of the mixing chamber 1 .

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PUM

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Abstract

The invention relates to a device and method for cleaning, activating or pre-treating workpieces by blasting a carbon dioxide snow which is produced from pressurised CO2-containing fluids and at least one type of carrying compressed gas and is accelerated by means of a discharge nozzle (14), wherein a two-phase carbon dioxide mixture of a carbon dioxide gas and carbon dioxide particles is produced in an agglomeration chamber (8) by agglomerating and compressing carbon dioxide snow crystals which are radially added to the carrying gas in a multistage mixing chamber (10, 11, 12) comprising a central jet pipe (4), around which the carbon dioxide mixture circulates and which is used for supplying said carrying gas in such a manner that a high-energy turbulent gas flow for processing a workpiece is obtainable.

Description

technical field [0001] The invention relates to a device and a method for cleaning, actuating or pretreating workpieces by means of dry ice jets, which are produced by pressurized CO 2 A fluid and at least one carrier compressed gas are generated and accelerated through the discharge nozzle, wherein a two-phase carbon dioxide mixture consisting of carbon dioxide gas and carbon dioxide particles is generated in a coalescing chamber by coalescing and compressing dry ice crystals and mixed with the carrier gas. Background technique [0002] Spraying methods and spraying devices for cleaning, actuating and pre-treating surfaces have been known in the prior art for many years. However, due to the expansion of environmental protection laws and fierce competition, in recent years, in the industrial cleaning of tools, molds, machines, equipment and components, new, environmentally friendly and inexpensive cleaning technologies have been sought. Surface treatments using different fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24C1/00C01B32/55
CPCB24C5/04B24C1/003
Inventor 埃尔宾·费利克斯罗特施泰因·拉斐尔克纳克施泰特·马克
Owner CRYOSNOW GMBH
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