Metal founding – Means to shape metallic material – Pressure shaping means
Patent
1999-06-03
2000-05-09
Lin, Kuang Y.
Metal founding
Means to shape metallic material
Pressure shaping means
164900, 425205, 366 78, 366 79, B22D 1700
Patent
active
060590122
ABSTRACT:
An apparatus for processing feed stock into a thixotropic state. The apparatus includes a barrel with first, second and nozzle sections. The first, second and nozzle sections are connected together and include surfaces that cooperatively defining a central passageway through the barrel. The first section is constructed of a first material, the second end section is constructed of a second material and the nozzle is constructed of a third material. The first material exhibits a greater resistance to thermal fatigue and thermal shock than the second material while the nozzle section includes a bushing which inhibits heat transfer to the die, precluding excessive molding pressures and cycle times. The apparatus also includes a preheater for preheating the feed stock before entry into the barrel, a thermal gradient monitoring system, a novel robust nozzle construction, and a two-stage embodiment of the apparatus.
REFERENCES:
patent: 5040589 (1991-08-01), Bradley et al.
patent: 5501266 (1996-03-01), Wang et al.
Carnahan Robert D.
Decker Raymond F.
Kilbert Robert
Newman Rich
VanSchilt Charles
Lin Kuang Y.
Thixomat, Inc.
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