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Browse Prior Art Database

Load Magazine Dispensing Mechanism for Sensitive or Oddly Shaped Components

IP.com Disclosure Number: IPCOM000107309D
Original Publication Date: 1992-Feb-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 5 page(s) / 192K

Publishing Venue

IBM

Related People

Frank, V: AUTHOR [+2]

Abstract

An automated manufacturing tool is described for bond and assembly of multi-layer ceramic modules now currently handled on manual tools. The initial step of this tool's operation is to load the caps or heatsinks being processed from a large volume input buffer onto conveyor pallet nests for entry into the conveyor flow. The input buffer is manually loaded by an operator periodically, and there are a wide variety of caps and heatsinks that must be handled to accommodate all product types. The input buffer must be a vertical stack arrangement due to space constraints.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 51% of the total text.

Load Magazine Dispensing Mechanism for Sensitive or Oddly Shaped Components

       An automated manufacturing tool is described for bond and
assembly of multi-layer ceramic modules now currently handled on
manual tools.  The initial step of this tool's operation is to load
the caps or heatsinks being processed from a large volume input
buffer onto conveyor pallet nests for entry into the conveyor flow.
The input buffer is manually loaded by an operator periodically, and
there are a wide variety of caps and heatsinks that must be handled
to accommodate all product types.  The input buffer must be a
vertical stack arrangement due to space constraints.

      Often board layout and/or heat dissipation requirements
necessitate that these heatsinks be of an odd shape, and the surfaces
that will be joined to the substrates are usually very intolerant of
scratches, abrasions, and debris to ensure a good seal.  These
factors present a problem in picking out a method of dispensing the
heatsinks one at a time from a buffer and presenting them for pick-up
by a handling robot that will place them on the conveyor pallet
nests.

      There are many prior art methods for dispensing parts. However,
but all of the techniques that could have been possible for this size
and type of application had to be ruled out for one of two reasons:
either they introduce too much possibility of part damage, or they
provided insufficient positioning accuracy.  For instance, often with
vertical stacks, the part directly above the one to be released is
clamped, holding the rest above in place while the bottom one drops
free.  Sometimes the bottom part is pushed out to the side through a
bottom opening in one of the sides of the containment structure.
These and other similar techniques involve rubbing of parts against
each other or the tool mechanisms, causing scratches, abrasions, and
shavings.  Also, with the rubbing and abrasion, it is difficult to
handle oddly shaped components in a controlled manner.  More
elaborate schemes are available to eliminate the damage factor, such
as individualized compartments, spacers between the parts, or more
sophisticated hardware, but these all involve more expense, space,
complexity, or handling.

      One solution is illustrated in the figures.  By developing a
vertical positioning system that has high repeatability and accuracy
at each of three distinct levels and uses compact and reliable
components, the required hardware was integrated into the overall
load magazine and can handle all of the required product types in the
space available.  Each chute has a pneumatic cylinder mounted
vertically beneath it to lift and lower the chute.  All of the
cylinders mate with a horizontal control bar that passes through all
their pistons j...