Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Mold motion or position control
Patent
1983-05-11
1984-09-11
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Mold motion or position control
425183, 425185, 425186, 425193, 264 405, B29C 306
Patent
active
044707878
ABSTRACT:
A press system that provides rapid advance of one platen on a movable crosshead through the use of programmed hydraulic controls and is specifically adapted for use with sheet molding compound (SMC) presses. Rapid locking or latching of the crosshead and the platen it carries is achieved through the use of hydraulically operated clamping and release cylinders. The lower platen is supported on hydrostatic bearings permitting the platen to move and at the same time parallelism of the mold halves is maintained by swiveling molding power cylinders. Separate push-back cylinders are used to separate the mold through a short load path so that when the mold "breaks away" there is very little springback to minimize any part breakage during mold stripping.
The lower platen also includes a mounting arrangement that provides the advantages of a rolling bolster or lower platen with a minimum of mounting structure. The control permits accurate rapid molding of plastic sheet parts in particular, which require high controlled force, closely controlled mold movement and operation at elevated temperatures.
REFERENCES:
patent: 2383736 (1945-08-01), Rembert
patent: 2722174 (1955-11-01), Albers
patent: 2905032 (1959-09-01), Fuchs
patent: 2980013 (1961-04-01), Swick et al.
patent: 3531830 (1970-10-01), Gelin
patent: 3543344 (1970-12-01), Hunt
patent: 3543346 (1970-12-01), Breher
patent: 3800588 (1974-04-01), Larson et al.
patent: 3802818 (1974-04-01), Watanabe et al.
patent: 3825386 (1974-07-01), Bello et al.
patent: 3908429 (1975-09-01), Gram
patent: 3918298 (1975-11-01), Petersen et al.
patent: 3921286 (1975-11-01), Petersen
patent: 3992978 (1976-11-01), Petersen
patent: 3994540 (1976-11-01), Petersen
patent: 4053276 (1977-10-01), Ahrweller et al.
patent: 4063453 (1977-12-01), Gram
patent: 4076780 (1978-02-01), Ditto
patent: 4206699 (1980-06-01), Hemmelgarm
patent: 4304540 (1981-12-01), Hammon
McBrayer Tinker R.
MTS Systems Corporation
Woo Jay H.
LandOfFree
Hydraulic press does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic press, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic press will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1193024