US 5,589,129 A · Method of manufacturing a molding using a filler or an additive concentrated on an arbitrary portion or distributed at a gradient concentration

Abstract

A liquid resin composition prepared by mixing an ionic material and/or a chargeable material into a thermosetting or thermoplastic resin is injected into a mold having a predetermined inner shape, and a DC voltage is applied to the liquid resin composition to concentrate the ionic material and/or chargeable material on a desired portion or to distribute the ionic material and/or chargeable material continuously. Thereafter, the resin composition is thermally cured when the resin composition contains the thermosetting resin, or the resin composition is hardened by cooling when the resin composition contains the thermoplastic resin, thereby obtaining a molding having a predetermined shape.

Claims18

Dependent claims

A method of manufacturing a molding, which comprises the steps of:

injecting a liquid resin composition containing at least one of an ionic material and a chargeable material into a mold;
applying a DC voltage to the liquid resin composition to make said at least one of the ionic material and the chargeable material migrate, thereby forming a concentration gradation of said at least one of the ionic material and chargeable material in the liquid resin composition, the liquid resin composition being in a liquid state while the DC voltage is being applied;
and
solidifying the liquid resin composition.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

08/491,687Filed 19 Jun 1995 · continuation

Priority

JP 5-03016119 Feb 1993

Granted

31 Dec 1996

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

B29C 70/681
By incorporating or moulding on preformed parts, e.g. inserts or layers , e.g. foam blocks: component parts, details or accessories; Auxiliary…
B29C 70/62
Comprising fillers only , e.g. particles, powder, beads, flakes, spheres: the filler being oriented during moulding
B29K 2105/002
Containing compounding ingredients: agents changing electric characteristics
B29L 2031/3406
Electrical apparatus, e.g. sparking plugs or parts thereof: components, e.g. resistors

Method of manufacturing a molding using a filler or an additive concentrated on an arbitrary portion or distributed at a gradient concentration

Life of this patent

Method of manufacturing a molding using a filler or an additive concentrated on an arbitrary portion or distributed at a gradient concentration

Life of this patent

Abstract

Claims18