Continuous or semi-continuous process for forming reconsolidated

Details Continuous or semi-continuous process for forming reconsolidated Continuous or semi-continuous process for forming reconsolidated

1985-07-23

1987-09-22

Spruill, Robert L.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

144362, B32B 3100

Patent

active

046953450

DESCRIPTION:

BRIEF SUMMARY
This invention relates to a process for forming a reconsolidated wood product, apparatus for forming a reconsolidated wood product, and a reconsolidated wood product formed by the process.
Australian Patent Specification No. 510,845 describes a reconsolidated wood product formed from at least one flexible open lattice work web of naturally interconnected wood strands generally aligned along a common grain direction, a substantial proportion of said strands being substantially discrete but incompletely separated from each other; said web having been consolidated by compression whilst substantially maintaining the wood strands aligned along same common grain direction and said strands being bonded together to hold them in juxtapositions assumed pursuant to said consolidation.
That patent specification also describes a process for forming a reconsolidated wood product from a flexible open lattice work web of naturally interconnected wood strands, said web being formed by partially rending natural wood so that said strands are generally aligned along a common grain direction, a substantial proportion of said strands being substantially discrete but incompletely separated from each other, said process comprising compressing the web to consolidate the strands whilst maintaining them such as to substantially extend in said original grain direction and bonding said splinters or strands together to hold them in juxtapositions assumed pursuant to said consolidation.
An object of this invention is to provide a process and apparatus capable of producing a continuous product, thereby to improve production efficiency and reduce losses occurring in finishing discrete product lengths.
In one aspect of the present invention, there is provided a process for forming a reconsolidated wood product as described above, said web comprising one of a plurality of webs; said process further comprising applying bonding agent to said webs, for effecting said bonding, and successively passing them through a compression device to effect said compression and consolidation, said webs being fed into the device in such a fashion that the webs make an angle to the direction of extent of the product and so that adjacent webs overlap each other in the direction of passing of the webs through said compression device.
The passing through of the webs may be effected by engagement and movement of the reconsolidated wood product emerging from the device.
The process of the invention may be carried out in a semi-continuous fashion, with the said compression device comprising two compression elements which are moved towards each other to effect said compression and consolidation, the engagement and movement of the reconsolidated product emerging from the device being effected by gripping the product with gripping means and moving the gripping means to effect the engagement and movement of the product.
The invention further provides, in another aspect, apparatus for carrying out the process of the invention, the apparatus comprising a compression device having a space extending therethrough for passage of said webs, after application of bonding agent, through the compression device, said compression device being effective to compress and consolidate said webs as they pass therethrough; and engagement means operable to engage the reconsolidated wood product as it emerges from said space, or said webs before passage into said space, to effect said passing through of the webs. Preferably, the compression device includes a pair of members movable towards and away from each other whereby to present, at two extreme positions of such movement respective greater and lesser magnitudes of said space therebetween and means for cyclically moving the elements between said extreme positions, said engagement means being effective to move said product intermittently and at times when the said members do not present said lesser magnitude of said space. Preferably, the members are arranged so that said space is convergent in the direction from an input to an output end

REFERENCES:
patent: 2758630 (1956-08-01), Hodge
patent: 3674219 (1972-07-01), Harvey
patent: 4232067 (1980-11-01), Coleman
patent: 4343667 (1982-08-01), Hollis
patent: 4390384 (1983-06-01), Turner
patent: 4507162 (1985-03-01), Iwamoto
patent: 4508772 (1985-04-01), Churchland et al.

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