US2111688A

US2111688A - Wood molding, shaping, or uniting apparatus

Info

Publication number: US2111688A
Application number: US71814A
Authority: US
Inventors: Weir George David
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-04-21
Filing date: 1936-03-30
Publication date: 1938-03-22
Anticipated expiration: 1955-03-22
Also published as: GB456966A

Description

March 22, 1938. wE l 2,111,688

WOOD MOLDING, SHAPING, OR UNITING APPARATUS Orig inal Filed April 9, 1955 2 Shgets-Sheet l March 22, 1938. G. D. WEIR v 2,111,688

v WOOD MOLDING, SHAPING, 0R UNITING APPARATUS Original Filed April 9, 1955 2 Sheets-Sheet 2 Patented Mar. 22, 1938 woo'n MOLDING, SHAPING, on UNITING Q APPARATUS George David Weir, Caulfield, Australia Original application April 9, 1935, Serial No.

15,469. Divided and this application March 30, 1936, Serial No. 71,814. In Australia April 3 Claims. (Cl. 144-281) This invention has reference to improved apparatus for shaping, molding or uniting door sections, wooden veneer boards or the like, and has been devised to provide apparatus that will 5 effectively mold, shape or unite door sections or veneer board in an expeditious and emcient manner, the following specification being a division of application Serial No. 15,469, filed April 9, 1935.

The object of this invention is to provide apparatus for the pressing or molding of door sections, wooden molding veneer boards or the like, the members to be joined or united being placed together in an assembled condition on a perforated plate or table with adhesive or cementing substance applied to said door sections or veneer boards; vacuum is then applied to the perforated table which draws the resilient molding bag into engagement with the assembled sections, whereby said member conforms to shape of the said sections and exerts a uniform pressure on the entire surface thereof to effect the uniting of the glued or cemented sections in the desired shape.

If desired movable pressure members may be included in the apparatus to provide an additional mechanical pressure on the top and ends of the wooden sections during the molding operation of the resilient molding member.

In order that the invention may be more readily 30 understood, reference will be made to the accompanying drawings in which:-

Figure 1 is a front elevation of the apparatus showing the frame 51 and cover 6| in partially raised positions.

Figure 2 is a top plan view of the apparatus partly in section and showing the frame 51 and cover SI completely raised. v

Figure 2a is a partial transverse sectional view through .the apparatus showing the mounting of 40 the frame 51 and the cover 6| on the table.

Figure 3 is a section taken on line 33 on Figure 2.

Figure 4 is a perspective view of the base plate upon which the molding of the veneer or like boards is effected.

Figure 5 is a detail of the hinged top and heater.

Figures 6 and '7 are views of essential details.

5 According to this invention a perforated table 50 is disposed at a convenient working height for an operator and is provided on the underside with a casing 5| to form a vacuum chamber 5|, perforations 52 in the table 50 extending directly 5 into said chamber which has a valve control pipe compartment 5 l.

53 leading to a source of suction, such as a pump or a cylinder connected to a pump 1 l.

The perforated table 50 has'disposed thereon a ribbed or grooved base plate 54 upon which the article or wooden sections or veneer boards 5 are disposed. This ribbed or grooved base plate 54 is positioned centrally on the perforated table 50 and is of such dimensions as to provide a peripheral clearance between the edges of the said plate and table.

The ribs or grooves 55 on the base plate 54 are transversely and longitudinally arranged and extend to communicate with spaced grooves 55 on the edges of said base plate. The grooves 55 and 5Bform air grooves or paths for admitting suction over the entire surface thereof, whereby air is withdrawn from all parts of the upper surface of the base plate 54 through the perforations 52 in the table 50 into the main vacuum A frame 51 is hinged at 51 to the upper surface of the table 50 to support a resilient molding and pressure creating member 58. The underside of the perforated table 50 has formed thereon a plurality of vacuum storage containers 5!! each of which has a valve controlled pipe communicating with the main vacuum chamber 60.

The rear side of the perforated table 50 has fitted thereto a cover or top 6| hinged .at 6| adapted, when lowered, to seat on said table, while mounted on the underside of the hinged top or cover BI is a heater 62 such as-an electrical resistance element.

' When the apparatus is to be utilized for the molding of wooden sections, such as for doors 3 or like fittings, I provide a crosshead 63 having a pressure element 64 carried thereon to be lowered under the action of vacuum impelled pistons 65 carried in cylinders 66 mounted on each end of the perforated table 50, the cylinders 58' being connected with the vacuum source by valved pipes 56 To apply a mechanical pressure to the abutting ends of wooden sectionswhen molded together, two spaced cramps 61 are provided at each side of the perforated table to move inwardly towards each other to impart pressure on to the sides or abutting ends of the wooden sections which it is desired to mold together. The cramps-6'! are transversely disposed as illustrated and carried on arms 68 which connect the pistons 69 mounted in horizontal cylinders 10 disposed below the perforated table 50 whereby as vacuum is admitted through the valved pipes 10" to the inner ends of the cylinders 10 at the rear of the pistons 69 press 64.

The operation of the apparatus illustrated in Figures 1 to 6 is as follows:

The wooden sections, veneer boards or the like are disposed on the ribbed or grooved base plate 54 with the glue or adhesive applied thereto, the resilient molding member 58 is moved to .the operative position about its hinges whereby said member or bag completely covers the wooden sections or boards.

The storage compartments 59, having been previously evacuated, are brought into communication with the main vacuum chamber 5| which causes the resilient molding member to immediately close over and conform to the exact shape of the wooden sections or veneer boards.

The pump H is then set in operation to impart vacuum continuously to the main chamber 5| whereby all air is withdrawn from around the wooden sections or boards and between the resilient bag or molding member 58 which is being achieved by means of the perforations 52 in the table and the grooves or channels and 56 in the base plate 54 on which the boards or sections are disposed. The continued action of the pump causes the resilient molding member 58 to forcibly engage with and exert pressure on to the entire surface and ends of the boards or wooden sections whereby the same having been glued or cemented are positively attached to each other. The action of the resilient molding member 58 is clearly illustrated in Figure 6 wherein two wooden sections are depicted as being molded and united by the pressure of the molding member 58 which, it will be noted, conforms to the shape of the wooden sections to effect the operation specified.

During this operation the cover BI is closed and the resistance heating element 62 therein maintains the Wooden boards or sections in a heated condition whereby the glue or cement material is maintained in a workable condition. The resilient bag or molding member 58 in conforming to the shape and outline of the veneer boards thereby imparts an intense inward pressure which, after predetermined treatment, unites the wooden sections together or produces a board having a plurality of plies to the veneer desired.

In breaking the vacuum in the main chamber 5| the resilient molding member 58 may be instantly released and folded back after the removal of the hinged top or cover 5! to facilitate removal of the molded wooden sections or boards. When using the mechanical press 64 and the side cramps 61 the hinged top or cover 8i would be dispensed with and as the resilient molding member 58 conforms to the shape of the wooden sections being molded the mechanical press and end cramps could be brought into operation to impinge on the surface of the rubber and thereby increase the pressure to be exerted on the wooden sections being molded together.

In molding one board to the shape of another board the resilient molding member 58 will exert suflicient pressure on a substantially straight or rectangular wooden section to make it conform to the peculiar or desired shape of the other wooden section to producea unitary wooden section or board as illustrated in Figure 7.

What I claim as my invention and desire to secure by Letters Patent is:

1. Apparatus for shaping, molding or uniting door sections or veneer boards comprising a casing having a vacuum chamber therein, a perforated table, a resilient pressure creating and molding member adjustably mounted on said table to close under vacuum and forcibly engage with wooden sections or veneer boards positioned on said table, means for imparting mechanical pressure on to the top of said wooden sections or veneer boards and means for imparting mechanical pressure to the sides or abutting ends of said wooden sections or veneer boards to effect the molding or shaping thereof.

2. Apparatus for shaping, molding or uniting door sections or veneer boards comprising a casing having a vacuum chamber therein, valve controlled pipes leading from said chamber to a source of suction, a perforated table formed on said casing, a ribbed or grooved base plate on said table to receivewooden sections or veneer boards in a condition to be molded or united, a resilient pressure creating molding member disposed on said table adapted under vacuum to conform to and forcibly engage with the wooden sections or veneer boards, a vacuum operated 'press adapted to descend on to the top of said molding member to impart mechanical pressure to said Wooden sections or veneer boards, and spaced coacting cramps mounted on each side of the perforated table to move thereacross under the action of vacuum to impart pressure to the sides or abutting ends of the wooden sections or veneer boards.

3. Apparatus for shaping, molding or uniting door sections or veneer boards comprising a vacuum chamber having a perforated table, a ribbed or grooved base plate disposed on said table to receive wooden sections or veneer boards, spaced l compartments formed below the perforated table around the vacuum compartment and having a valve controlled connection with a source of suction, a resilient pressure-creating and molding element hinged to the top of said table, and valve controlled communication between said compartments and the vacuum chamber to withdraw air from under said resilient molding member to cause same to'conform to the shape of, and forcibly engage with the wooden sections or veneer boards, substantially as and for the purposes specified.

GEORGE DAVID WEIR.