Powder contact member and method for surface treatment of powder contact member

Abstract

A powder-contacting member that prevents adhesion of powder even when the powder coming into contact with a surface is not only in the form of a single particle but also in the form of a layer, and has high flowability, and a method for the surface treatment of a powder-contacting member. The powder-contacting member has a surface with which powder comes into contact and on which surface treatmentis performed. An arithmetic average peak curvature Spc (1 / mm) of the surface is 150 to 400, a peak density Spd (piece / mm2) of the surface is 10,000 to 180,000, a root mean square gradient Sdq of thesurface is 0.05 to 0.30, and an arithmetic average height Sa (microns) of the surface is 0.02 to 3.00.

Description

technical field [0001] The present invention relates to a surface treatment method of a powder contact member (for example, a hopper, etc.) and a powder contact member for use in a device or equipment for supplying, conveying or measuring a powder that comes into contact with a powder, and the powder The contact member has a surface in which powder adhesion is prevented and powder fluidity is improved by surface treatment. Background technique [0002] Powder often tends to adhere to and accumulate on surfaces of components that come into contact with the powder, causing various problems. For example, in the case of repeatedly supplying a predetermined amount of powder stored in a hopper, when the powder adheres to the surface of the hopper and accumulates, there is a problem that the flow rate of the powder becomes unstable and the predetermined amount cannot be repeatedly supplied of powder. [0003] In order to cope with the above-mentioned problems, various inventions ...

AI Technical Summary

Problems solved by technology

For example, in the case of repeatedly supplying a predetermined amount of powder stored in a hopper, when the powder adheres to the surface of the hopper and accumulates, there is a problem that the flow rate of the powder becomes unstable and the predetermined amount cannot be repeatedly supplied powder

[0016] However, as a result of exhaustive studies carried out by the inventors, it has been found that, at the location where the powder is actually handled, the powder flows on a hopper or chute in a state where the powder is not in the form of individual particles but in layers (granule layers), Therefore, the surface contact between the particle layer and the contact surface (flat surface) needs to be considered, and in the case of considering the surface contact, parameters such as the line roughness parameter (JISB0601) commonly used in existing papers and the above-mentioned related art 2D index (2D roughness parameter) is not appropriate

Images