Method and device for dosing and packaging polysilicon chunks and dosing and packaging unit

US8938936B2 · kind B2 · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Matthias VIETZ · Mattighofen, AT
• Rainer Hoelzlwimmer · Vilshofen an der Donau, DE
• Bruno Lichtenegger · Emmerting, DE

Key dates

• Filing date: Jan 25, 2012
• Grant date: Jan 27, 2015
• Expiry date: Aug 18, 2033

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65B9/20
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

Disclosed is a method for dosing and packaging polysilicon chunks, wherein a product flow of polysilicon chunks is transported via a feed channel, separated by at least one screen into coarse and fine chunks, weighed and dosed to a target weight by a dosing balance, discharged via a discharge channel and transported to a packaging unit where a first plastic bag is filled with the polysilicon chunks and sealed, the plastic bag containing polysilicon chunks being packaged with a further plastic bag which is formed by a shaper and subsequently welded, wherein the at least one screen and the dosing balance at least partially include a hard metal on their surfaces and the shaper for forming the plastic bag includes a wear-resistant coating. Also disclosed are a dosing unit, a packaging unit and a device for dosing and packaging polysilicon chunks, which contains a dosing unit and a packaging unit.