Stock material or miscellaneous articles – Structurally defined web or sheet – Fold at edge
Patent
1980-06-17
1982-09-28
Dixon, Jr., William R.
Stock material or miscellaneous articles
Structurally defined web or sheet
Fold at edge
428156, 428164, 428170, 428218, 428422, 264314, 26433114, 264500, 264510, B32B 304, B32B 2700, B29C 1706, B29D 904
Patent
active
043518699
ABSTRACT:
This invention is concerned with high density compacted and sintered polymer articles which previously could not be made entirely non-porous to liquid. It was inevitable, in an article with different parts, that frictional considerations in pressing one part would materially differ from those of another with the practical result that uniformity of density, throughout the article, could never be achieved. Fortuitously, for purposes of making various different parts of an article void free, the density values for each part need not be substantially all the same, but instead need only be raised above a predetermined threshold value.
An object of this invention is the preparation of physically dense objects of sintered polymer with multiple parts, such as with abruptly varying cross section, which are uniformly void-free throughout, and of everywhere "theoretical" (reguline) density.
Present application discloses simultaneous fluid pressing and sintering of sinterable polymer into high density shapes with multiple parts, recessed sections, and/or varied cross section(s), or attaching and/or adhering the polymer to various rigid materials and/or surfaces. By constraining heated fluid to deform thin sheet in contact with sintering polymer pieces, masses, or assembly, it has been found that the sintered polymer can be formed in multiple parts, of difficult and distributed shapes, recessed and varied cross section, etc., or adhered and/or interlocked to rigid material or surface(s) in faultless and void-free quality, everywhere of highest density.
Composites with glossy and distributed surface, and undulating in polymer shape, are consolidated with rigid material the void-free combination benefitting from their respective and distinct individual properties and contours. Formed thin sheet or recessed section moldings per above may be combined integrally with the composites while still retaining void-free quality etc. throughout.
Apparatus for producing the moldings and composites consists of one or several sheets of thin material sealed inside a split container composed of corresponding container sections and possible additional ones. Various combinations of single and multiple-diaphragm sets can be assembled for simultaneous fabrication of moldings or composites.
REFERENCES:
patent: 2644198 (1953-07-01), Crawford
patent: 2689380 (1954-09-01), Tait
patent: 2691814 (1954-10-01), Tait
patent: 2745139 (1956-05-01), Burton
patent: 2851725 (1958-09-01), Bauer
patent: 2929109 (1960-03-01), Cresap
patent: 2936301 (1960-05-01), Thomas et al.
patent: 2955973 (1960-10-01), Smith
patent: 2972784 (1961-02-01), Shonka et al.
patent: 2976093 (1961-03-01), Reiling
patent: 3008601 (1961-11-01), Cahne
patent: 3010950 (1961-11-01), Thomas
patent: 3015855 (1962-01-01), Merkel
patent: 3021567 (1962-02-01), Ranalli
patent: 3048537 (1962-08-01), Pall et al.
patent: 3060517 (1962-10-01), Fields
patent: 3068513 (1962-12-01), Chaffin
patent: 3126311 (1964-03-01), Harris
patent: 3215908 (1966-05-01), Wilenius et al.
patent: 3235637 (1966-02-01), Hoffman et al.
patent: 3262834 (1966-07-01), Abell et al.
patent: 3391221 (1968-07-01), Gore et al.
patent: 3421972 (1969-01-01), Cromwell et al.
patent: 3431160 (1969-03-01), Usui et al.
patent: 3444021 (1969-05-01), Bilbe
patent: 3459213 (1969-08-01), Schenck, Jr. et al.
patent: 3574805 (1971-04-01), Hatch et al.
patent: 3582451 (1971-06-01), Stolki et al.
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