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Vacuum diaphragm device
| Details |
Inventors: Newsom, Cosby M.;
Assignee:
Primary Examiner: Robinson; Ellis P.
Assistant Examiner: Seidleck; James J.
Attorney, Agent or Firm: Cislo & Thomas
A bonding apparatus for vacuum bagging is disclosed comprising a base having a top surface provided with an outer peripheral vacuum manifold, a diaphragm having a top member and side walls adapted for placement on the base and in conjunction therewith defining a chamber encompassing a work piece; one or more evacuation ports formed in the base or the diaphragm adapted for connection to a vacuum source whereby the chamber may be evacuated of ambient atmosphere to form a vacuum therein; and an edge member associated with the side walls, including a solid, conformable seal adapted to seal the vacuum manifold and to provide at least a primary seal thereagainst. In one embodiment, intended for autoclaving applications, a seal providing both primary and secondary sealing is disclosed. The diaphragm, edge member and seal preferably comprise an elastomeric material. |
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawing wherein like numerals of reference represent like elements through-out, a bonding apparatus depicted generally at 10, is shown.
The bonding apparatus comprises a base 12 and a diaphragm 14.
As seen more clearly in FIG.
2, the base 12 has a top surface 16 provided with an outer peripheral vacuum manifold 18, defined by seal groove 19, an inner peripheral vacuum groove 20 and at least one vacuum port 22.
That is to say, the inner peripheral vacuum groove 20 surrounds the area intended for supporting a work piece (not shown) and in turn is surrounded by the outer peripheral vacuum manifold 18.
An evacuation port 30 is provided which communicates between the vacuum manifold 18 and a vacuum source (not shown).
The vacuum manifold 18 may be machined or electroformed into the base plate 12 or, as shown, may comprise a formed, welded-on channel.
The diaphragm 14 comprises a top member 24 and a downwardly depending side wall 26.
The downwardly depending side wall 26 completely skirts the perimeter of the top member 24.
The diaphragm 14 is adapted for placement on the base 12, and in conjunction therewith defines a chamber 28 which is suitable for encompassing the work piece.
The height of the side wall 26 is such that a sufficient volumetric capacity is formed so as to encompass the work piece.
An edge member 32 is associated with the side wall 26 of the diaphragm 14 and overlies the peripheral vacuum groove 20, thereby providing an inner peripheral seal.
At its termination, the edge member 32 includes a solid, contoured, V-shaped seal 34 which is adapted to seal the vacuum manifold 18, thereby providing an outer peripheral seal.
Although the invention is best suitably employed with a contoured vacuum bag (one which is curved to shape to fit over the work piece), a conformable vacuum bag (one which stretches over the work piece) may also be employed.
The entire contoured diaphragm 14, comprising top member 24, downwardly depending side wall 26, edge member 32 and V-shaped seal 34 is preferably of integral, one piece construction
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Optical Systems 
