WO2002062561A1 - Equipement et procede correspondant pour la production de mousses souples de polyurethanne - Google Patents

Equipement et procede correspondant pour la production de mousses souples de polyurethanne Download PDF

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Publication number
WO2002062561A1
WO2002062561A1 PCT/BR2002/000021 BR0200021W WO02062561A1 WO 2002062561 A1 WO2002062561 A1 WO 2002062561A1 BR 0200021 W BR0200021 W BR 0200021W WO 02062561 A1 WO02062561 A1 WO 02062561A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaker
reactor
equipment
production
flexible polyurethane
Prior art date
Application number
PCT/BR2002/000021
Other languages
English (en)
Inventor
Augusto Victório SCHMUZIGER
Original Assignee
Schmuziger Industria E Comercio De Maquinas Ltda
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schmuziger Industria E Comercio De Maquinas Ltda filed Critical Schmuziger Industria E Comercio De Maquinas Ltda
Priority to EP02711665A priority Critical patent/EP1444089A1/fr
Publication of WO2002062561A1 publication Critical patent/WO2002062561A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
    • B29C44/428—Mould constructions; Mould supporting equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3442—Mixing, kneading or conveying the foamable material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2110/00—Foam properties
    • C08G2110/0008—Foam properties flexible

Definitions

  • This Invention Patent is concerned to an equipment and respective process for production of flexible polyurethane foams with different densities through the application of positive and negative pressures, which were conceived focusing to supply the demand, both at national and international level, of "ecologically correct" products, that is, not aggressive to the environment and which, at the same time, enhances the quality of the produced flexible foams.
  • the equipment has been developed with all basic components comprised in the foam formulation, weighted/dosed in the reactor/shaker, as well as three dye lines.
  • the new drawer system practically does not require maintenance as in the conventional system, since it is much easy to disassembly it and assemble it, with efficient sealing.
  • the pressure box system is very efficient in the foam production process and, at the same time, the new system, in comparison with the conventional one (even when provided with efficient external exhaustion system), eliminates the natural Mélubrity of all foam industries, since the polyurethane reaction and expansion happens in closed system provided with gas exhauster, thus eliminating the carbon dioxide and other remaining gases.
  • the foam production process with positive or negative pressure fully changes its its physical and mechanical features.
  • the pressurization chamber has dimensions sufficient to allow the mold entry.
  • the mold was developed with larger sides, with horizontal displacement, for easier removal of the foam blocks from the molds and with the front side displacing in circular direction, with all movements being pneumatically driven, with a pneumatically-driven guillotine valve-type upper input for the reactor entry.
  • the set is dimensioned so as that the time elapsed for the start of reaction (TDI mix), discharge, reactor removal, closing of the guillotine valve and pressurization is the smallest possible focusing the foam quality.
  • the equipment production capacity is of approximately 12 (twelve) blocks per hour with only 5 (five) workmen, that is, 96 (ninety-six) blocks are produced per day on an 8 (eight)-hour shift, with a high quality foam that would not be possible in a conventional equipment, in view that, in order to reach a foam with such physical and mechanical characteristics, it would be required the change of the formulation and of all chemical components.
  • the equipment drives, as well as all of their safety devices, are controlled by a computer that operates interlinked to a PLC, allowing the operator to see the foam growth in the video display, since such information is fundamental for him/her. Such information facilitate to the operator to make corrections when required, since they are already recorded in the memory.
  • the formulations may be filed in the computer memory and, in case corrections are required, the only thing to do is to search them in the video screen and make the changes.
  • - lower is the foam density gradient among the top, middle and bottom;
  • - lower is the density gradient among the top, middle and bottom of the foam
  • Foams made under pressure show to be advantageous for those who require foams with high load support (hardness, ILD) and foams made under vacuum are for those who search for flexible foams where the mechanical properties are not required and, for some reason, do not intend to use chemical expansion agents harmful to the nature.
  • ILD hardness
  • FIGURE 1 represents the front view of the equipment.
  • FIGURE 2 represents the side view of said equipment.
  • the equipment proposed herein for production of flexible polyurethane foams with different densities through application of positive and negative pressures is characterized essentially by being comprised of a solid and resistant supporting structure of the whole set (1), having the reactor/shaker (2) assembled on it, in which the pre-mix of some of the chemical components required to the production of foams (polyol, copolymer, amine, water, silicone, tin), which are introduced through injectors (4) installed close to said reactor/shaker (2) is made through motor-driven shaker (3). It is also assembled a reservoir (5) for dosing of the other chemical component (TDI), before the reactor/shaker (6) of final mix. The pre-mixed components of the reactor/shaker and of the dosing reservoir are transferred to the final mix (6) reactor/shaker, where the chemical reaction will be made in a very quick manner.
  • TDI chemical component
  • the shaker of the final mix (6) reactor/shaker is driven by the transmission shaft (7) driven by the motor (8).
  • Such reactor/shaker (6) is provided with drawer that is opened and closed through pneumatic cylinder (9).
  • the final mix (6) reactor/shaker is integrated to the mobile supporting structure (10), which moves in the vertical direction through sliding rollers (11) along guide rails (12), such set being supported by cable (14) guided by a set of pulleys (13), which is driven by the motor-reducer set (22).
  • a pressure accumulator tank or lung tank (18) is connected to the pressure box or pressurization chamber (17) for accumulation of positive or negative pressure with oil-free vane-type pump, operating at the maximum pressure of +0.400 kgf/cm 2 , minimum pressure of -0.300 kgf/cm 2 rel., with pressurization time from 10 to 30 seconds.
  • That pressure box or pressurization chamber (17) has dimensions sufficient only to the mold entry, having a pneumatically-driven guillotine valve-type upper input, for entry of the final mix (6) reactor/shaker.
  • the pressure box or pressurization chamber (17) is provided with a gas exhaustion system (19) located inside it, to remove the carbon dioxide and other remaining gases.
  • the mold consists of a box (20) assembled on rollers (21) made of carbon steel plate and profiles, which has been developed with larger sides displacing in the horizontal direction for easier removal of the foam blocks and the front side displacing in circular direction, with all movements being pneumatically driven.
  • the chemical components polyol, copolymer, amine, water, silicone and tin are pre- mixed in the reactor/shaker (2) by the variable speed shaker electrically controlled by the command panel and frequency inverter, while TDI is weighted/dosed in the weighting reservoir (5), after which the mix is placed in the final mix (6) reactor/shaker, starting the reaction.
  • the reagent is poured in the mold, where it is submitted to positive or negative pressure (vacuum) made by the lung tank (18) and controlled by the vacuum meter, thus obtaining the flexible polyurethane foam blocks with different densities according to the applied pressure (positive/negative).
  • this equipment and respective process for production of flexible polyurethane foams fully complies with the proposed objectives, performing the functions for which it has been designed and developed on a practical and effective manner, providing a series of technical, practical, ecological and healthy advantages in the work environment, as well as functional and economic advantages, being provided with its own and innovative features, with the fundamental requirements of novelty.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

L'invention concerne un équipement comprenant un réacteur/mélangeur (2), un réservoir de pesée/dosage (5), un réacteur/mélangeur pour mélange final (6), une chambre de pressurisation (17) renfermant un système d'évacuation de gaz et combinée à un réservoir d'accumulation de pression (18) pour l'accumulation de pression positive ou négative. Cet équipement comporte également un moule (20), monté sur roulettes (21), qui présente des faces plus longues se déplaçant dans le sens horizontal, de manière à faciliter l'extraction des blocs de mousse, et une face avant se déplaçant en sens circulaire, tous ces mouvements étant entraînés par un système pneumatique. Le procédé correspondant est mis en oeuvre à partir du mélange préalable des composants chimiques polyol, copolymère, amine, eau, silicone et étain, dans le réacteur/mélangeur (2), puis par la pesée/le dosage du composant TDI dans le réservoir (5). Ces mélanges sont ensuite transférés au réacteur/mélangeur pour mélange final (6), où la réaction chimique est réalisée. Le réactif est versé dans le moule, où il est soumis à la pression positive ou négative (dépression) générée par le réservoir d'accumulation de pression (18), de manière à permettre l'obtention de blocs de mousse souple de polyuréthanne de densités différentes, en fonction de la pression appliquée.
PCT/BR2002/000021 2001-02-07 2002-02-07 Equipement et procede correspondant pour la production de mousses souples de polyurethanne WO2002062561A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02711665A EP1444089A1 (fr) 2001-02-07 2002-02-07 Equipement et procede correspondant pour la production de mousses souples de polyurethanne

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRPI0100512-0A BR0100512B1 (pt) 2001-02-07 2001-02-07 "equipamento e respectivo processo para produção de espumas flexìveis de poliuretano".
BR0100512-0 2001-02-07

Publications (1)

Publication Number Publication Date
WO2002062561A1 true WO2002062561A1 (fr) 2002-08-15

Family

ID=3946694

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2002/000021 WO2002062561A1 (fr) 2001-02-07 2002-02-07 Equipement et procede correspondant pour la production de mousses souples de polyurethanne

Country Status (3)

Country Link
EP (1) EP1444089A1 (fr)
BR (1) BR0100512B1 (fr)
WO (1) WO2002062561A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3184419A (en) * 1958-02-06 1965-05-18 Dunlop Rubber Co Method for the production of polyurethane foamed material
DE2022147A1 (de) * 1970-05-06 1971-11-18 Mirabed Ag Vorrichtung und Verfahren zur Herstellung von Formteilen aus geschaeumtem Kunststoff
DE2543302A1 (de) * 1975-09-27 1977-04-07 5090 Leverkusen Verfahren und vorrichtung zum herstellen von reaktionsgemischen aus fluessigen reaktionskomponenten, insbesondere fuer die herstellung von polyurethanschaumstoffen
US5182313A (en) * 1992-01-09 1993-01-26 Scott Carson Method and apparatus for forming articles made of polyurethane

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3184419A (en) * 1958-02-06 1965-05-18 Dunlop Rubber Co Method for the production of polyurethane foamed material
DE2022147A1 (de) * 1970-05-06 1971-11-18 Mirabed Ag Vorrichtung und Verfahren zur Herstellung von Formteilen aus geschaeumtem Kunststoff
DE2543302A1 (de) * 1975-09-27 1977-04-07 5090 Leverkusen Verfahren und vorrichtung zum herstellen von reaktionsgemischen aus fluessigen reaktionskomponenten, insbesondere fuer die herstellung von polyurethanschaumstoffen
US5182313A (en) * 1992-01-09 1993-01-26 Scott Carson Method and apparatus for forming articles made of polyurethane

Also Published As

Publication number Publication date
EP1444089A1 (fr) 2004-08-11
BR0100512B1 (pt) 2011-05-03
BR0100512A (pt) 2002-10-22

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