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Insertion Head for Multi Size Square Modules

IP.com Disclosure Number: IPCOM000050777D
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Leung, TL: AUTHOR

Abstract

The problem with a pickup and insertion vacuum head is that the modules are of different sizes and must fit into a brickwall situation of components on a printed circuit board. Brickwalling refers to a situation where the components, such as modules, are packed tightly edge to edge on the printed circuit board. The placing of the modules into the openings on the printed circuit board must be done without damaging the modules and still maintain a fast cycle time.

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Insertion Head for Multi Size Square Modules

The problem with a pickup and insertion vacuum head is that the modules are of different sizes and must fit into a brickwall situation of components on a printed circuit board. Brickwalling refers to a situation where the components, such as modules, are packed tightly edge to edge on the printed circuit board. The placing of the modules into the openings on the printed circuit board must be done without damaging the modules and still maintain a fast cycle time.

Since the module sizes range from small to Large squares, the vacuum head cannot be bigger than the size of the smallest module to be inserted due to the component brickwall situation on the printed circuit board. It is very questionable whether the same small head can generate enough vacuum surface area to pick up a large module or, if it can pick it up, not lose it while traveling at high speed. The small head used with a large module tends to dent the center of the module, especially during the pin clinching operation.

To avoid the above problems, a coaxial vacuum head 10 is provided having the inner head 12 the same size as the smallest module and the outer head 14 the same size as a medium size module. For example, both heads 12, 14 are in the down position when picking up a medium or large size module as shown in Fig. 1. When picking up a small module, step 16, located adjacent the small module pick-up area, automatically pushes the outer head 14 upward u...