Method of filling elongated channels with polymeric foam

Details Method of filling elongated channels with polymeric foam Method of filling elongated channels with polymeric foam

1998-05-13

1999-08-24

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 401, 264 465, 264161, B29C 4406, B29C 4412

Patent

active

059421738

ABSTRACT:
A method of filling an elongated generally lineal channel with polymeric resin foam, preferably polyurethane foam, using an application gun having a laser sight for accurately aligning the application gun relative to the longitudinal axis of the channel to be filled. The method of this invention includes locating the application gun nozzle opposite the open end of the elongated generally lineal channel to be filled, directing and aligning the laser beam along an axis generally parallel to the longitudinal axis of the lineal channel to a predetermined point exterior of the channel spaced from the open end of the channel, thereby aligning the application gun nozzle generally coincident with the longitudinal axis of the channel, using the application gun to direct a thin elongated stream of liquid foamable polymeric resin into the channel open end along an axis generally coincident with the longitudinal axis of the channel, and allowing the liquid polymeric foam resin to foam and rise through the channel, substantially filling the channel with polymeric foam. In the preferred embodiment, the laser is fixed to the laser gun by a bracket which aligns the laser beam at a small acute angle to the axis of the nozzle of the application gun and the laser beam is then sighted to a point at or adjacent the opposed end of the channel accurately aligning the application gun with the channel to be filled in mass production applications.

REFERENCES:
patent: 4107248 (1978-08-01), Schlieckmann
patent: 4158535 (1979-06-01), Dever, Jr.
patent: 5129975 (1992-07-01), Easterle et al.
patent: 5173221 (1992-12-01), Payne

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