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Browse Prior Art Database

Magnetic Core Transfer Technique

IP.com Disclosure Number: IPCOM000050096D
Original Publication Date: 1982-Sep-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Allis, GE: AUTHOR [+2]

Abstract

During the assembly process, magnetic cores can be more reliably transferred from a core plate to a transfer pad by maintaining a low vacuum during the application of the pad to the cores while in the core plate.

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Magnetic Core Transfer Technique

During the assembly process, magnetic cores can be more reliably transferred from a core plate to a transfer pad by maintaining a low vacuum during the application of the pad to the cores while in the core plate.

Referring to the figure, cores 1 are positioned within individual slots 2 by a vacuum applied through ducts 3 to attract and hold the cores in position during the vibration of plate 4. Vacuum is drawn within manifold 5 through an adjustable bleeder valve 6. The cores are removed from the loading plate by partially embedding them in an adhesive 7 coated on a flexible pad 8. As the pad and adhesive are lowered toward the cores, the vacuum is reduced by adjustment of the bleeder valve to a low level sufficient to maintain the cores in their respective slots in the loading plate. This vacuum is sufficient to overcome the attraction of static charge from the transfer pad or forces from the variation in air leakage paths as the pad and adhesive approach contact with the cores.

Thereafter, a weight 9 is applied to hold the adhesive pad in place while the vacuum is turned off. The loading plate is then moved onto a transfer fixture where the vacuum is reapplied, the weight removed, and the cores embedded to the desired depth with a stepped roller. The transfer pad with cores adhering thereto can be removed from the loading plate and cured for subsequent threading operations.

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