Reduced pressure mould production method

Details Reduced pressure mould production method Reduced pressure mould production method

1975-04-25

1976-06-01

Shore, Ronald J.

Metal founding

Process

Shaping a forming surface

164 40, 164171, B22D 704, B22D 902

Patent

active

039601986

ABSTRACT:
An improved method of producing a mould under a reduced pressure is described herein. In the improved method, after a main pattern (1) having a protrusion and a recess is inserted with an auxiliary pattern (8) having the same shape as said recess and having an air-tight film (9) tightly adhered on its outer peripheral surface into said recess, said main pattern (1) is fixedly placed on a surface plate (2) provided with evacuating means, and the surface of the main pattern (1) including the upper surface of said surface plate but excluding the upper surface of said auxiliary pattern (8) is covered with an air-tight film (3). Then, after said air-tight film (3) has been tightly adhered onto the surface of the main pattern (1) excluding the upper surface of said auxiliary pattern (8) and onto the upper surface of the surface plate (2) with the evacuating means of the surface plate (2), said auxiliay pattern (8) is extracted from the main pattern (1). Subsequently, after a casting frame (4) provided with pressure reducction means has been placed on the surface plate (2), solid particles (7) are filled in said casting frame (4). Still further, after the entire top surface of said casting frame (4) and the solid particles (7) has been covered with an air-tight film (10), said air-tight films (3) and (9) are adhered onto the side of the solid particles (7) by reducing the pressure within said casting frame (4) with said pressure reduction means and by recovering an atmospheric pressure within the surface plate (2), and then the main pattern (1) as well as the surface plate (2) are separated from the casting frame (4).

REFERENCES:
patent: 1804400 (1931-05-01), Davis
patent: 2757426 (1956-08-01), Brennan
patent: 2835004 (1958-05-01), Whitesell
patent: 3293703 (1966-12-01), Iaccone
patent: 3830279 (1974-08-01), Arbenz et al.
patent: 3887321 (1975-06-01), Hijikota et al.

Affiliated with

Also associated with

Rating

Reduced pressure mould production method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reduced pressure mould production method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reduced pressure mould production method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2399517