Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1995-05-05
1997-02-04
Timm, Catherine
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
264572, 425130, 425135, B29C 4576
Patent
active
055994873
ABSTRACT:
The invention relates to a method for fabricating hollow plastic objects of thermoplastic material, comprising the following steps: 1) injecting melt into the tool cavity (1,2); b) Simultaneously and/or subsequently introducing a pressurized fluid into the melt, so that the melt which has been introduced into the molding tool (1, 2) is distributed in the cavity and is pressed against the walls of the molding tool (1, 2), the pressurized fluid being conducted from a pressurized container (5) into the melt, and the pressurized container (5) being supplied with fluid by a compressor (7) which contains a drive element (6); c) allowing the molded part (8) to cool; and d) relieving the cavity of the pressure of the pressurized fluid. According to the invention, the drive element (6) of the compressor (7) is maintained at a temporally constant power level (P) at least over the production of a large number of plastic objects. This power level is advantageously calculated from the ratio of the work (W) which must be done by the drive element (6) in order to furnish an amount of pressurized fluid that is needed for a certain number of plastic objects over an associated total cycle time (T), relative to this cycle time (T). As a result, the drive element (6) operates continuously, which results in favorable energy conditions and lower wear.
REFERENCES:
patent: 4211523 (1980-07-01), Hunerberg
patent: 5047183 (1991-09-01), Eckardt et al.
patent: 5056997 (1991-10-01), Hayashi et al.
patent: 5112563 (1992-05-01), Baxi
patent: 5246646 (1993-09-01), Baxi
"Sandwich Moulding--Competitor or Complement to Conventional Injection Moulding?-Specific Product Quality Demands New Production Processes-AirMould-MultiFoam," Injection Moulding Sets Course for the Nineties-Improved Quality-Reduced Costs Through New Processes and Flexible Solutions, Battenfeld, pp. 6/1-6/9, 6a-6g (Oct. 1987).
Eckardt Helmut
Gosdin Michael
Battenfeld Holding GmbH
Timm Catherine
LandOfFree
Method and device for fabricating plastic objects from thermopla does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and device for fabricating plastic objects from thermopla, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for fabricating plastic objects from thermopla will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-675635