Browse Prior Art Database

Wave Solder Panel Support ASM

IP.com Disclosure Number: IPCOM000109922D
Original Publication Date: 1992-Sep-01
Included in the Prior Art Database: 2005-Mar-24
Document File: 1 page(s) / 48K

Publishing Venue

IBM

Related People

Garcia, J: AUTHOR [+2]

Abstract

When very large circuit boards run through a wave solder machine, the heat of the solder can cause the boards to sag in the middle. As the cards come out of the solder wave and cool, the cards will have a serious deflection. Some cards can be supported in the center with a support that holds the card, but these can damage lands and mark the card. These supports also limit how high an air knife can be raised to improve the solder process. These supports also require that a clear horizontal path through the components be provided in the design.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 78% of the total text.

Wave Solder Panel Support ASM

      When very large circuit boards run through a wave solder
machine, the heat of the solder can cause the boards to sag in the
middle.  As the cards come out of the solder wave and cool, the cards
will have a serious deflection.  Some cards can be supported in the
center with a support that holds the card, but these can damage lands
and mark the card.  These supports also limit how high an air knife
can be raised to improve the solder process.  These supports also
require that a clear horizontal path through the components be
provided in the design.

      This design proposal is to support the card with a beam that
attaches on top side of the card.  All cards have existing tooling
holes that can be utilized for attaching this beam.  Tooling holes
are generally standardized on the larger cards.  In this design,
there are three locking pins involved.  The two exterior pins lock
the beam to the card.  The interior pin is adjustable and passes thru
a tooling hole somewhere close to the center of the card, and
supports the card to prevent deflection.  One or two of these beams
can be used per card.  One of the exterior pins is rotated with a
knob, and a CAM action then locks the three pins in a rigid flat
plane to support the card as it passes through the molten solder.
These support assemblies are mounted at the front of the wave solder
machine and removed after they exit the washer.

      This assembly will help cards m...