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Browse Prior Art Database

Laminated Steel Mold

IP.com Disclosure Number: IPCOM000115486D
Original Publication Date: 1995-May-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Clark, WD: AUTHOR [+2]

Abstract

Disclosed is a process for making injection molds by the use of laminated sheets of steel.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Laminated Steel Mold

      Disclosed is a process for making injection molds by the use of
laminated sheets of steel.

      The Laminated Steel Mold (LSM), as shown in Fig. 1, utilizes
CAD/CAM to manufacture prototype molds.  The geometry of the object
to be modeled is drawn using a three dimensional modeling system such
as CATIA.  This solid model is then sliced into .015" slices, each
slice represents a cross section of the modeled part.  These slices
or cross sections are then laid out on a .015" thick sheet of
stainless steel utilizing a photoresist exposed by a Laser Image
Generator (LIG) as shown in Fig. 2.

      This steel panel is developed then chemically machined to
create the steel layers that make the mold cavity.  Each steel layer
looks like a sheet of paper with the cross section of the part cut
out of the middle.  These steel layers are stacked together to build
a Laminated Steel Mold.  This chemical machining is similar to the
process used to make printbands and printed circuit boards.  More
complex part designs may utilize standard mold components such as
core pins, bushings, guide pins, and mold bases.  The combination of
the Laminated Steel Mold and the standard mold components combine to
make a rapid cost effective prototype mold that can be used with a
wide variety of injection molding resins and compression or transfer
molded elastomers to make prototype parts (Fig. 3).