Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
  • B27N1/00—Pretreatment of moulding material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
  • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
  • B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
  • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
  • B27N3/007—Manufacture of substantially flat articles, e.g. boards, from particles or fibres and at least partly composed of recycled material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
  • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
  • B27N3/08—Moulding or pressing
  • B27N3/28—Moulding or pressing characterised by using extrusion presses

Definitions

• the present invention concerns a process for the relization of plates, panels and similar consisting of exhausted olive husks of crushed olive stones and polypropylene, and derived products .
• the aim set forth is reached by the process according to the present invention, that determines a complete immersion into polypropylene of each single part of olive husks, of different granulometry, by means of the realization of a mixture at high temperature, that may be obtained with extrusion screws.
• the percentage of the exhausted olive husks in the constitution mixture is provided for in order of 50-80% in weight.
• the process according to the present invention comprises the following phases:
• the olive husks are poured onto a conveyor belt that feeds a crushing mill with rotating blades, that provides for a variable granulometry according to tne featuies ol the final product;
• the crushed material that flows out of the mill is extracted from the bottom by means of an Archimedean screw and led to the dryer, consisting of a steam burner that makes lower the moisture degree around a value of 5-6%;
• the dried olive husks material is led to a storage silos and from there, by means of pneumatic tubings, transported into the feedbox;
• the crushed olive stones play the role of filling, heat-resistant material (charge), while the polypropylene, that turns into plastic at a temperature about 230°C, has an amalgamating function;
• the crushed material passes through a central extruder, while the polypropylene is plasticized in a lateral extruder and the plastic material comes out from a plane head;
• the product obtained by means of the process according to the present invention is fed into a calender, where it is squeezed and brought to the desired thickness obtaining a plane plate that is now led onto a cooling down roll.
• Shears and a piling up device allow to perform automatic repeating cuts with the same length and to pile the plates up.
• three small blades are provided between the calender and the pulling device, for performing the cut of the lateral wastes, as well as the central cut, while the lateral bands are directly led into the mouth of each crushing and re-crushing mill and then prepared for the immediate use by means of an appropriate loading feedbox.
• the plates having a variable thicknes between 0 and 25 mm, obtained at the end of the extrusion and calendering process, may be used, according to the present invention, as elements in many finished products, as, e.g.:
• the plates With a feeding belt connected to said oven, the plates are placed onto the press bank in a number variable according to the final product to be obtained.
• the press acts onto the pre-heated plates with a constant and uniform pessure, variable according to the thickness, to the mould of the components and to the final destination of the product.
• the cooling phase takes place, during which the material returns to its final density.
• a further, parallel and/or successive working cycle may be coupled to the one already described, having for purpose the use of the exhausted olive husks of greater granulometry (5 to 8 mm), discarded in the extrusion process and which, together with other olive husks of smaller granulometry, may be mineralized so as t be used as inert in mixing processes with many binders, in particular with cement.
• the obtained conglomerate has a high resistance to compression, provided by the short fibre of the olive husks, and may therefore be used for the production of industrial modular elements, like bricks, and in particular for the production of hand-made vibro-compressed materials like the self-blocking blocks for external flooring which at present are realized with inert materials taken from quarries and/or rivers.
• the product obtained according to said variant is a valid alternative to the exploitation of the ground, with a further protection of the ambient.
• the plates or panels obtained with exhausted olive husks may be reinforced by using glass-fibre, polyester or carbon, in a coupling between the plate and the fibres (one-layer or multi-layer), as well as a component of the mixture, in the mixing and extruding phase of the plates.
• This treatment considerably improves the physical and mechanical features of the final product, in particular those that concern the elasticity module and the pulling resistance, thus opening the possibility of use in many uses difficult for the conventional panels like lofts, constructions with lamellar beams, etc.
• fibres allows to reduce, maitaining the known resistance, the thicknesses of the panels, with a further improvement of the efficiency for what concerns the weight, the transport, the assemblying, the working.
• a tridimensional aspect may be given to the plates and pannels obtained according to the present invention, by a simple printing operation. It is known that this shaping - that concerns the thickness of the panel and that may also concerns the aesthetic aspect (ashlar, edging, frames etc.) as well as the statical aspect (ribbings etc.) - may be obtained, in the conventional panels and in wood only by means of complex and delicate working cycles (panelgraphing) , as well as by means of coupling machine-shaped elements according to their thickness and final shape.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Wood Science & Technology (AREA)
• Forests & Forestry (AREA)
• Dry Formation Of Fiberboard And The Like (AREA)

Applications Claiming Priority (1)

Publications (1)

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ID=11332587

Family Applications (1)

Country Status (2)

Cited By (1)

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Family Cites Families (4)

• 1996
  • 1996-04-12 WO PCT/IT1996/000071 patent/WO1997038834A1/en not_active Application Discontinuation
  • 1996-04-12 EP EP96910174A patent/EP0833725A1/de not_active Ceased

Non-Patent Citations (1)

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