Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1989-05-26
1992-07-14
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
G05B 1910
Patent
active
051306301
ABSTRACT:
A control circuit (10) for an extrusion die (13) is operatively arranged to supply a command signal (e.sub.c) to an actuator (24,25) for controlling the movement of a mandrel (11) relative to a die head (12) as plasticized material is extruded through an orifice (14) to form a parison (15). The controller includes a memory (28) for receiving and storing a plurality of initial set points supplied from a keypad (29). A recalculation circuit (42) is operatively arranged to recalculate the magnitude of each set point according to the equation S.sub.n(r) =(S.sub.n(i) -G.sub.1)B+G.sub.2, where S.sub.n(r) is the recalculated value a particular set point, G.sub.1 is a first reference die gap, G.sub.2 is a second reference die gap, B is a scaling factor, and S.sub.n(i) is the corresponding initial set point stored in memory. The recalculation circuit is operatively arranged to supply each recalculated set point to the memory to replace the initial set point stored therein. The recalculated set points are supplied to the actuator, via an interpolator (30) for controlling movement of the mandrel during an extrusion cycle.
REFERENCES:
patent: 4011493 (1977-03-01), Fukase et al.
patent: 4159293 (1979-06-01), Fukase et al.
patent: 4224560 (1980-09-01), Uekusa
patent: 4396975 (1983-08-01), Kurakake
"Signals and Systems", Alan V. Oppenheim and Alan S. Willsky, Prentice Hall Int. 1983; p. 421.
Barthel et al., "Automatisieren bei Kunststoffblasformmaschinen", Kunststoffe 76 (1986) p. 485 et seq.
Hess et al., "Mikroprozessortechnik im Blasformbetrieb", Kunststoffe (1985).
"Systemtechnik fur Blasformmaschinen", Moog GmbH (1983).
Bergmann Saul M.
Moog GmbH
Shoop Jr. William M.
LandOfFree
Mandrel-moving control circuit, and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mandrel-moving control circuit, and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mandrel-moving control circuit, and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-337261