Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Agglomeration or accretion
Patent
1991-12-16
1993-09-14
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Agglomeration or accretion
2643282, 26432816, 26432818, 264335, 264DIG49, 264DIG69, 4251748E, 425547, 425437, 425812, 425DIG46, B29C 3512, B29C 4543
Patent
active
052446085
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a method of manufacturing moulded bodies based on wood dust, for example, smoking pipe heads.
BACKGROUND OF THE INVENTION
FR-547,636 proposes manufacturing pipe heads by a moulding process by which preferred pipe wood, for example bruyere, can be used in dust form in the moulding mixture holding various binding and curing agents.
In the conventional manufacturing of pipes of pure bruyere wood there is a considerable amount of waste and the wood can be utilized much better if the wood is initially used in a dust form as a significant constituent of suitable moulding material for the production of pipe heads. However, in the technical approach proposed in FR-547,636, the moulding substance contains less than 50% of wood, while the remaining components are not environmentally suitable.
Additionally, in U.S. Pat. No. 2,352,201, a moulding of pipe heads is proposed utilizing bruyere dust; however, the product is mainly a plaster product and is unattractive.
SUMMARY OF THE INVENTION
The aim underlying the present invention essentially resides in providing a method by which it is possible to produce moulded bodies such as pipe heads having a very high content of wood dust and being economically producible with a brief processing time of, for example, thirty seconds, as compared with, for example, FR-547,636 requiring a curing time of some sixty hours.
However, the invention goes a step further in proposing a moulding of many other smaller objects of wood other than pipe heads or, for that matter, moulding of larger objects. More particularly, the present invention is based upon the consideration that in the wood laminating technique there has been a considerable remarkable development by which it is possible, by special binding agents and curing methods, to obtain a very effective bonding between thin wooden plates in sandwich products, and, according to the invention, it is possible to achieve a correspondingly effecting binding together of wood particles in a moulding compound which is prepared with an absolute predominance of wood dust and only with the required minimum of binding and curing agents and being subjected to a similar curing treatment.
It is essential that it is possible to hereby produce the moulded bodies with a very high content of wood dust, such that the bodies will get the full character of real wooden products, which, by way of example, can be painted in quite the same manner as adjacent wooden parts, e.g. in case of moulded furniture handles. The same cheap wooden elements, when made by moulding, may even exhibit increased durability, as in the products there will be no weakening veins or stratifications.
The modern binding agents as developed for binding together the plate elements in laminated wood products are both effective and environmentally compatible, and, when it is pertinent in the present connection to bind together tiny wood particles in the form of wood flour or small chips, it may be sufficient to use only a few percent of binding agent, such that the products may consist of, for example, 96% wood, that is, the products will be practically purely wooden products.
With the use of wooden chips the moulding will result in objects having a structured surface, which will not, of course, be similar to a natural wood surface with veins, but when unpainted it will still be more `living` than, for example, a moulded plastic surface.
The very brief processing time which can be exploited with the invention is based on the use of high frequency heating. The modern, harmless binding agents are water based and are therefore easily heatable for curing by the influence of a high frequency field, which will be true not only when joining wooden plate elements, but also when joining wooden particles in a moulding. For this reason, in connection with the invention, it is possible to operate with such a brief production time that it will be highly economical to produce `wooden members` by moulding rather than by conventional shaping t
REFERENCES:
patent: 2352201 (1944-06-01), Jacob
patent: 2407833 (1946-09-01), Jablonsky
patent: 2697254 (1954-12-01), Gordon
patent: 3668286 (1972-06-01), Brooks et al.
patent: 3956541 (1976-05-01), Pringle
patent: 4672006 (1987-06-01), McGraw
patent: 5069835 (1991-12-01), Oriez et al.
Mix-Wood ApS
Thurlow Jeffery
Vargot Mathieu
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