Flow cabinet system for cleaning at least one object

• US 10,639,686 B2
• Filed: 05/20/2015
• Issued: 05/05/2020
• Est. Priority Date: 05/21/2014
• Status: Active Grant

• Current Assignee: Digital Metal AB (H. Intressenter AB)
• Original Assignee: Digital Metal AB (H. Intressenter AB)
• Inventors: Burgemeister, Magnus, Andersson, Bo-Goran
• Primary Examiner(s): Carlson, Marc
• Application Number:
  US15/313,094
• Publication Number:
  US 20170182528A1
• Time in Patent Office: 1,812 Days
• CPC Class Codes: B08B 1/12 Brushes
• CPC Class Codes: B08B 15/026 Boxes for removal of dirt, e.g. for cleaning brakes, glove- boxes
• CPC Class Codes: B08B 2215/003 with the assistance of blowing nozzles
• CPC Class Codes: B08B 5/02 Cleaning by the force of jets, e.g. blowing-out cavities airguns or nozzles per se B05B1/005
• CPC Class Codes: B22F 2003/247 Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
• CPC Class Codes: B22F 3/24 After-treatment of workpieces or articles B22F3/1146 takes precedence
• CPC Class Codes: B33Y 40/20 Post-treatment, e.g. curing, coating or polishing

Abstract

The invention relates to a flow cabinet system for cleaning at least one object, the system comprising:

• • a cabinet having walls enclosing a volume;
  • tubing for the supply of compressed gas as well as a plurality of handheld cleaning tools within the volume for removing, by means of the supplied compressed gas, powder from the at least one object; and
  • an extraction unit comprising tubing for extracting powder-laden gas from the volume through a gas outlet located near one of the left and right side walls and the back wall.
    The cabinet further comprises a gas inlet in the back wall near the other of the left and right side walls and the back wall so as to define an overall flow that is substantially horizontal and transverse to the operator.

Claims

1. A flow cabinet system for non-destructive cleaning of at least one object, the system comprising:

a cabinet having a bottom wall for supporting the at least one object to be cleaned, a top wall, a left side wall, a right side wall, a front wall and a back wall, the walls enclosing a volume;

a valve terminal within the volume for supplying, via tubing, compressed gas without blasting material to a plurality of handheld cleaning tools and tubing within the volume for removing, by means of the supplied compressed gas, powder from the at least one object; and

an extraction unit comprising tubing for extracting powder-laden gas from the volume through a gas outlet located near the back wall and one of the left and right side walls;

the cabinet further comprising a gas inlet to the volume in the back wall near the other of the left and right side walls to provide a horizontal gas flow from the gas inlet to the gas outlet, a viewing window, a left glove port near the left side wall and the front wall and a right glove port near the right side wall and the front wall, the two glove ports being constructed and arranged for an operator to manually operate at least one of the plurality of cleaning tools inside the cabinet, the gas inlet extending through the back wall;

the extraction unit being constructed and arranged to extract a minimum volume of powder-laden gas per unit of time larger than the maximum volume of the supplied compressed gas per the unit of time.

2. The flow cabinet system according to claim 1, wherein the extraction unit is constructed and arranged to extract a minimum volume of powder-laden gas per unit of time which is at least twenty times the maximum volume of the supplied compressed gas per the unit of time.

3. The flow cabinet system according to claim 1, wherein the extraction unit is constructed and arranged to extract between 50 Nm3/hour and 250 Nm3/hour, of powder-laden gas, and the combination of tubing for the supply of compressed gas with each of the plurality of handheld cleaning tools being constructed and arranged to supply compressed gas at a pressure within the range from 2 to 4 bar gauge, and at a volumetric flow rate within the range from 2.0 to 5.5 Nm3/hour.

4. The flow cabinet system according to claim 1, wherein the extraction unit comprises at least one of (a) an internal silencer positioned inside the cabinet and (b) an external silencer positioned outside the cabinet, the external silencer being positioned for it to be adjacent the bottom wall of the cabinet, and the gas outlet coinciding with the inlet of the external silencer and the outlet of the external silencer being in the form of a tubing connector.

5. The flow cabinet system according to claim 4, wherein the walls of the cabinet comprise four tubing connectors, each permitting the connection of tubing inside and outside of the cabinet.

6. The flow cabinet system according to claim 1, wherein all the tubing within the volume is anti-static.

7. The flow cabinet system according to claim 1, wherein all the electrically conductive components of the cabinet system are on the same electric potential and wherein the cabinet system is grounded.

8. The flow cabinet system according to claim 1, wherein the valve terminal is for selecting one of the cleaning tools connected thereto, the valve terminal being positioned near the top wall of the cabinet.

9. The flow cabinet system according to claim 1, further comprising a plurality of hooks near or on the top wall of the cabinet which are constructed and arranged to temporarily hold the tubing for the supply of compressed gas and the tubing of the extraction unit.

10. The flow cabinet system according to claim 1, wherein the extraction unit comprises a cyclone separator constructed and arranged to receive the powder-laden gas extracted from the volume and to separate powder particles from the gas.

11. The flow cabinet system according to claim 1, wherein the extraction unit comprises a removable container for collecting powder particles separated from the gas.

12. The flow cabinet system according to claim 1, wherein the extraction unit is provided with a filter for filtering the gas discharged to the atmosphere.

13. The flow cabinet system according to claim 1, wherein the gas inlet is provided with a filter for filtering the gas entering the volume.

14. The flow cabinet system according to claim 13, wherein the extraction unit is provided with a filter for filtering the gas discharged to the atmosphere, and wherein the filter of the extraction unit is identical to the filter of the gas inlet.

15. The flow cabinet system according claim 1, wherein each of the two glove ports has a glove connected thereto in a gas-impermeable manner, each glove being made of a gas-permeable material.