Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under...
Patent
1987-05-12
1988-04-26
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
264513, 264572, 425557, 425559, 425562, 425573, B29C 4500
Patent
active
047401508
ABSTRACT:
Apparatus for producing an injection moulding of plastics material comprises means for introducing a supply of plastics material, passage means for communicating the supply means to a mould space, and means for introducing a pressurized gas into the plastics material filling the mould space whereby the gas creates a gas containing cavity in the plastics material and for thereafter relieving the gas pressure within the gas containing cavity before the mould is opened. The gas supply/pressure relieving means comprise valve means including a valve port opening directly into the mould space, for opening the gas filled cavity to the atmosphere, a valve member for closing the port, and means to supply pressurized gas to the mould while the valve member is in the port closing position to create the cavity and to maintain the valve port open to the cavity whereby, after a moulding operation has been finished, the supply of pressurized gas can be terminated and pressurized gas in the cavity in the moulding can be vented to atmosphere by opening the valve member.
REFERENCES:
patent: 4129635 (1978-12-01), Yasuike et al.
patent: 4136220 (1979-01-01), Olabisi
patent: 4247515 (1981-01-01), Olabisi
patent: 4397806 (1983-08-01), Hettinga
patent: 4474717 (1984-10-01), Hendry
patent: 4555225 (1985-11-01), Hendry
"Gas Injection Relieves Moulding Stress"; Eureka Transfers Technology, Jun. 1985, p. 31.
"Moulding System with Body Appeal" (undated).
"Gas-Cored Injection Techniques Go into Production"; Plastics Machinery and Equipment, Nov. 1985.
Cinpress Brochures, "Controlled Internal Pressure Process" & Cost Savings with Cinpress, presented at Plastics Show, England-Sep. 1985.
"Process Molds Rigid, Smooth Parts That Are `Strees Free`"; Modern Plastics, Nov. 1985, p. 26.
"Advanced Injection Moulding Process"; European Plastics News, Jun. 1985.
"Plastics After Deal Clinched"; John Baker (undated).
"Plastics Moulding Process Gives More Design Freedom"; Oem Design, Jun. 1985.
"Swirl-Free Foam Parts"; Plastics Technology, May 1976, pp. 33-36.
"Through-the-Nozzle Gas Injection Produces Class-A Foam Parts"; Modern Plastics, Mar. 1980, pp. 22-24.
"The Best of Two Worlds in Plastics Processing"; Machine Design, Dec. 9, 1982, pp. 99-102.
"New Automotive PP, HDPE Applications Tested in Europe"; Plastics Technology, Nov. 1985, p. 106.
Heitbrink Timothy W.
Peerless Cinpres Limited
Woo Jay H.
LandOfFree
Injection moulding apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Injection moulding apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Injection moulding apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-817247