Classifications

• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
  • D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
  • D21J3/12—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of sheets; of diaphragms
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
  • D21J1/00—Fibreboard
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
  • D21J1/00—Fibreboard
  • D21J1/16—Special fibreboard
  • D21J1/20—Insulating board

Definitions

• the present invention relates to insulating panels made from recycled raw materials or in a noble state made up of cellulose fiber and agglomerated plant waste and more particularly of paper and paper. in bulk or in bales from selective crops.
• the object of the invention is to provide the process as described above with new characteristics improving the various stages of the process and allowing as long as a self-supporting, dry, non-cas ⁇ ing, felted, non-deformed material resisting a compressive force of 160 N / m2 with, a maximum deformation of 10%.
• the process for manufacturing insulating panels according to the invention is characterized in that:
• the homogenized dough coming from a dispenser is fed into the preforming machine (1) on an endless forming cloth (3), of the foamed papermaking type, serving successively for the support and the draining the dough during pressing and preforming and handling means of the preformed panel for its evacuation from the preforming machine (1);
• the preformed panel is introduced into a tunnel oven (5) with double-sided percussion.
• the hot air being blown on both sides of the panel to be dried in a forced and very uniform manner at a temperature between 185 ° C and 200 ° C.
• the panel dried and automatically calibrated, covered on each face with adhesive and a layer of cardboard, is introduced into a heating press which, subsequently, hardens the adhesive and produces a knockout on the perimeter of the sign.
• Figures 1A and 1B in elevation, the main phases of the operating diagram, and Figure 2 a partial view on a larger scale of the heating press.
• a panel according to the invention is produced from, for example, the following materials: straw, loose or bale paper, mains water and draining water, recycled chips from calibration and machining.
• the pulp is prepared in a pulper, homogenized and then sent to a doser feeding a preformer 1, the movable plate 2 of which overcomes an endless forming fabric 3, of the stationery forming fabric type.
• the mobi le 3 plate actuated by jacks, slides downwards until the required pressure, of the order of 1.1 kg / cm2 to 4 kg / cm2, is reached.
• the canvas 3 is used for supporting the dough and for draining it during pressing and preforming and also as a means of handling the preformed panel to evacuate it from the preforming machine and quickly transfer it to a conveyor 4 to two speeds via a 4 'elevator-descender.
• the fabric 3 is driven by cylinders 1 'per- tant by an appropriate means to adjust its running and centering. These cylinders 1 'are provided with a cleaning system by scraping and spraying water. In order to distribute the compression stresses on the forming fabric 3, an intermediate perforated sheet 3 ′ is fixed to the added mesh of the preformer 1 and said fabric 3 slides over it.
• the two-braided conveyor 4 slowly introduces the preformed panel into the tunnel oven 5, equipped with several stage conveyors allowing production on several parallel levels 6.
• the drying in the oven is carried out under very precise repetitive conditions aimed at eliminating a well-defined percentage of water in the preformed panel of the order of 65% to 75% relative to the total weight of the cake .
• This water after drying, leaves a quantity of air cavities giving the panel its thermal and acoustic qualities as well as its felted rigidity.
• the continuous oven operates at a temperature between 185 ° C and 200 ° C and the hot air is distributed on both sides of the panel in a forced and very uniform manner at a speed between 13 m / sec and 18 m / sec.
• the drying time will depend on the thickness of the panel.
• the conditions required for drying make it possible to obtain optimal treatment of the material and to preserve its qualities throughout the manufacture.
• the dry panels are unloaded from a two-speed conveyor 7 (elevator-descender 7 ') automatically on pallets, or they are introduced directly by a belt conveyor 8 into a double-sided caliper 9, where the panel is calibrated and sanded automatically.
• the calibrated panel is then sent to a pallet, or else to the gluing 10 and to the covering 11 by a layer of cardboard on each face before being introduced into a heating press 12, which hardens the glue. Simultaneously, a knockout on the perimeter of the panel is carried out in this heating press 12.
• the edges are thinned by compression in the form of a chamfer with a width of 4 cm to 6cm and a depth of 2 mm to 4 mm on The four sides of the panel. This allows the user to join the joints of the panels always in a tight and solid way using a strip of fiberglass glued in the hollow created by the chamfers of two juxtaposed panels.
• the finishing is then done perfectly using filling and finishing plaster.
• FIG. 2 The embodiment of the chamfer in the heating press 12 intended to bond the final coating of the panel is shown in FIG. 2 showing the fixed heating plate 13 with a shim 14, the mobile heating plate 15 mounted on hydraulic cylinders 16 and provided with a counterform 17 for the chamfer, the panel 18 with the adhesive 19 and the coating 20.
• the thinning of the edges of the panel and the polymerization of the adhesive for bonding the coating are carried out in a single pressing operation hot.
• the panel On leaving the heating press, the panel is sawn square on all four sides, put on a pallet and stored.
• cellulose and plant waste have been mentioned in the preamble.
• cellulose is meant either cellulose from old paper mixed from selective crops, defibrated with water in a conventional pulper to form a pulp, or cellulose produced from vegetable crops such as papyrus, bagasse sugar cane, wood, banana leaves and all fibrous plants of the same type, defibrated to form a paste.
• vegetable waste plant materials considered as manufacturing residues, such as coffee parch, bran, rice husk and all other grain husks, grain and rice flakes, sawdust and wood shavings.

Landscapes

• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Paper (AREA)
• Dry Formation Of Fiberboard And The Like (AREA)
• Building Environments (AREA)
• Refrigerator Housings (AREA)

Priority Applications (8)

Applications Claiming Priority (1)

Publications (1)

Family

ID=3883184

Family Applications (1)

Country Status (8)

Cited By (2)

Families Citing this family (1)

Citations (6)

• 1988
  • 1988-04-29 AU AU18065/88A patent/AU615452B2/en not_active Ceased
  • 1988-04-29 DE DE8888904450T patent/DE3872522T2/de not_active Expired - Fee Related
  • 1988-04-29 EP EP88904450A patent/EP0367770B1/fr not_active Expired - Lifetime
  • 1988-04-29 WO PCT/BE1988/000013 patent/WO1989010449A1/fr active IP Right Grant
  • 1988-04-29 JP JP63504422A patent/JPH03500552A/ja active Pending
  • 1988-04-29 AT AT88904450T patent/ATE77859T1/de not_active IP Right Cessation
• 1989
  • 1989-10-24 PT PT92083A patent/PT92083A/pt not_active Application Discontinuation
  • 1989-12-28 RU SU894742912A patent/RU2015237C1/ru active

Patent Citations (6)

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