FR2871090A1 - Procedure for making articles from recycled rubber consists of reducing rubber to powder which it put into mold and heating in two stages - Google Patents

Procedure for making articles from recycled rubber consists of reducing rubber to powder which it put into mold and heating in two stages Download PDF

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Publication number
FR2871090A1
FR2871090A1 FR0406091A FR0406091A FR2871090A1 FR 2871090 A1 FR2871090 A1 FR 2871090A1 FR 0406091 A FR0406091 A FR 0406091A FR 0406091 A FR0406091 A FR 0406091A FR 2871090 A1 FR2871090 A1 FR 2871090A1
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France
Prior art keywords
mold
rubber
powder
heating
stages
Prior art date
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Pending
Application number
FR0406091A
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French (fr)
Inventor
David Spenner
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to FR0406091A priority Critical patent/FR2871090A1/en
Publication of FR2871090A1 publication Critical patent/FR2871090A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0026—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting
    • B29B17/0042—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting for shaping parts, e.g. multilayered parts with at least one layer containing regenerated plastic
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/003—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor characterised by the choice of material
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/52—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/26—Scrap or recycled material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Abstract

The procedure, using rubber from used pneumatic tyres, consists of reducing the rubber to a powder with a grain size of 150-500 mu m, putting it into a mold and heating in two stages. In the first stage the temperature inside the mold is raised to 50-90 [deg]C. In a second stage the temperature inside the mold is raised to 90-170 [deg]C, and the pressure is maintained at an appropriate level.

Description

L'invention concerne la transformation du caoutchouc vulcanisé qui seThe invention relates to the processing of vulcanized rubber which

trouve sur les pneumatiques usagés, en pièces ou ustensile de consommation courante ou non courante, montée ou non montée ou assemblée sur un autre produit.  found on used tires, in parts or utensils of current or non-current consumption, mounted or not mounted or assembled on another product.

Le principe pour cela est de mouler par chauffage et compression de la poudre de caoutchouc. Les principales étapes du procédé sont les suivantes: -le caoutchouc est réduit en poudre, la granulométrie de la poudre de caoutchouc étant comprise entre 150 et 500 10 microns.  The principle for this is to mold by heating and compressing the rubber powder. The main steps of the process are as follows: the rubber is reduced to powder, the particle size of the rubber powder being between 150 and 500 microns.

-la poudre de caoutchouc est introduite dans un moule, -la poudre de caoutchouc est chauffée en deux étapes principales successives, une première étape où la température à l'intérieur du moule est comprise entre 50 c et 90 c, on entame alors la phase de compression qui pourra varier de 3 à 30 tonnes puis une deuxième étape où la température à l'intérieur du moule est comprise entre 90 c et 170 c, on maintien la pression nécessaire à la fabrication de la pièce jusqu'à ce que la température soit atteinte.  the rubber powder is introduced into a mold, the rubber powder is heated in two successive main stages, a first stage where the temperature inside the mold is between 50c and 90c, the phase is then started; compression which can vary from 3 to 30 tons then a second stage where the temperature inside the mold is between 90 c and 170 c, maintaining the pressure necessary for the manufacture of the piece until the temperature be reached.

On va décrire ci-dessous de façon plus détaillée le procédé selon l'invention.  The method according to the invention will be described in more detail below.

A. Découpe ou déchiquetage du caoutchouc vulcanisé sur une carcasse de pneumatique usagé afin d'en séparer les fibres textiles et les parties métalliques. On obtient alors du caoutchouc dit propre . on va pouvoir ensuite en faire des granulats. La taille des granulats, ou la granulométrie, dépend directement du type et de la taille de la pièce a fabriquer. La granulométrie doit être comprise entre 150 et 500 microns. Ce choix est très spécifique suivant la forme, le volume ou la géométrie que l'on veut donner à la pièce finie.  A. Cutting or shredding vulcanized rubber on a used tire carcass to separate textile fibers and metal parts. We then obtain the so-called clean rubber. we will then be able to make aggregates. The size of the aggregates, or the particle size, depends directly on the type and size of the part to be manufactured. The particle size should be between 150 and 500 microns. This choice is very specific according to the shape, the volume or the geometry that one wants to give to the finished piece.

B.La température est également un facteur très important dans la transformation du caoutchouc. La température à l'intérieur du moule ou de l'empreinte doit être cohérente avec l'épaisseur de la pièce 30 10 15 20 25 30 finie. Cette température est pré-définie suivant plusieurs critères: - l'épaisseur ou le volume de la pièce finie. - L'aspect ou l'état de surface de la pièce (lisse ou granuleuse) - Le temps de fabrication et de démoulage de la pièce, en prenant en compte le chargement des granulats dans le moule.  B.Temperature is also a very important factor in rubber processing. The temperature inside the mold or cavity must be consistent with the thickness of the finished part. This temperature is pre-defined according to several criteria: - the thickness or volume of the finished part. - The appearance or surface condition of the part (smooth or granular) - The manufacturing and demolding time of the part, taking into account the loading of the aggregates in the mold.

Pour le résultat recherché, la température doit être comprise entre 50 C et 90 C pour une première étape ( l'étape de compression) et entre 90 C et 170 C dans un deuxième temps. Le moule est chauffé par des résistances électriques qui sont placées de façon régulière autour de l'empreinte dans le moule. On obtiendra ainsi une température homogène de la poudre de caoutchouc à l'intérieure.  For the desired result, the temperature must be between 50 C and 90 C for a first step (the compression step) and between 90 C and 170 C in a second step. The mold is heated by electrical resistances that are placed evenly around the cavity in the mold. This will give a homogeneous temperature of the rubber powder inside.

C. La phase de compression, commune en partie avec la phase de chauffe. Cette compression peut être obtenue de différente manières: par exemple à l'aide d'une presse hydraulique, d'un système vis sans fin etc... le tonnage varie lui aussi en fonction de la pièce à obtenir. La valeur est alors comprise entre 3 et 30 tonne ce qui donne un pression comprise entre 171.5 et 238 Kpa en fonction de la taille de la pièce à fabriquer.  C. The compression phase, partly in common with the heating phase. This compression can be obtained in different ways: for example using a hydraulic press, a worm system etc ... the tonnage also varies depending on the piece to get. The value is then between 3 and 30 ton which gives a pressure between 171.5 and 238 Kpa depending on the size of the part to be manufactured.

D. La quantité de granulats ou plutôt de poudre est un facteur très important pour la fabrication des pièces. Pour obtenir et optimiser le produit, nous avons établi un ratio ou plutôt une masse volumique idéale qui pourra varié en fonction des efforts de compression soit 1.105 à 1. 510 g/cm3.  D. The quantity of aggregates, or rather powder, is a very important factor in the production of parts. To obtain and optimize the product, we have established an ideal ratio or rather an ideal density which can vary according to the compressive forces of 1.105 to 1. 510 g / cm3.

Le poids de la pièce obtenue par rapport à son volume, dépend donc de la quantité de poudre mise dans le moule pour un volume de pièce donné et la force de compression exercée sur le moule.  The weight of the piece obtained with respect to its volume, therefore depends on the amount of powder placed in the mold for a given piece volume and the compressive force exerted on the mold.

Nous pouvons alors dire que quatre étapes sont indispensables et indissociables pour pouvoir mouler une pièces avec comme matière première de la poudre obtenue du caoutchouc récupéré sur les pneumatiques usagés. Ces quatre étapes sont les suivantes: 1) Choix de la granulométrie de la poudre.  We can then say that four steps are indispensable and indissociable to be able to mold a piece with as raw material of the powder obtained rubber recovered on the used tires. These four steps are as follows: 1) Choice of the particle size of the powder.

2) Choix du poids de poudre pour un volume de pièce finie donné.  2) Choice of powder weight for a given finished piece volume.

3) Mise en température du moule.3) Heating the mold.

4) Choix de la valeur du tonnage de compression.  4) Choice of the value of the compression tonnage.

Le moule est conçu pour reproduire la forme exacte de la pièce à obtenir. Il sera équipé de plusieurs évents qui permettront à l'air chaud de s'échapper pour laisser la place à la matière et ainsi la répartition de poudre sera uniforme.  The mold is designed to reproduce the exact shape of the piece to be obtained. It will be equipped with several vents that will allow the hot air to escape to give way to the material and thus the powder distribution will be uniform.

Lors de la phase de démoulage, il faudra prévoir une opération d'ébavurage sur la pièce pour éliminer les traces laissées par les évents. Mais aussi un soufflage dans les évents pour éliminer les traces éventuelles de poudre. 30  During the demolding phase, it will be necessary to provide a deburring operation on the part to eliminate the traces left by the vents. But also a blow in the vents to eliminate any traces of powder. 30

Claims (3)

REVENDICATIONS 1) Procédé pour fabriquer par moulage des objets en caoutchouc à partir de caoutchouc de récupération provenant de carcasses de pneumatiques usagés caractérisé en ce que: -le caoutchouc est réduit en poudre, la granulométrie de la poudre de caoutchouc étant comprise entre 150 et 500 microns, -la poudre de caoutchouc est introduite dans un moule, -la poudre de caoutchouc est chauffée en deux étapes principales successives, une première étape où la température à l'intérieur du moule est comprise entre 50 c et 90 c, on entame alors la phase de compression puis une deuxième étape où la température à l'intérieur du moule est comprise entre 90 c et 170 c, on maintien la pression nécessaire à la fabrication de la pièce jusqu'à ce que la température soit atteinte.  1) A method for manufacturing rubber articles from rubber recovered from used tire carcasses by molding, characterized in that: the rubber is reduced to powder, the particle size of the rubber powder being between 150 and 500 microns the rubber powder is introduced into a mold, the rubber powder is heated in two successive main stages, a first stage where the temperature inside the mold is between 50c and 90c; compression phase and a second stage where the temperature inside the mold is between 90 c and 170 c, maintaining the pressure necessary for the manufacture of the room until the temperature is reached. 2) Procédé selon la revendication précédente, caractérisé en ce que la valeur de compression pour la fabrication est comprise entre 171.5 et 238 Kpa selon le type de pièce à réaliser.  2) Method according to the preceding claim, characterized in that the compression value for manufacture is between 171.5 and 238 Kpa depending on the type of part to be produced. 3) Procédé selon la revendication 1 ou 2 caractérisé en ce que 25 la masse volumique idéale de la poudre pourra varié en fonction des efforts de compression soit de 1.105 à 1.510 g/cm3. 35  3) A method according to claim 1 or 2 characterized in that the ideal density of the powder may vary depending on the compression forces of 1.105 to 1.510 g / cm3. 35
FR0406091A 2004-06-07 2004-06-07 Procedure for making articles from recycled rubber consists of reducing rubber to powder which it put into mold and heating in two stages Pending FR2871090A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0406091A FR2871090A1 (en) 2004-06-07 2004-06-07 Procedure for making articles from recycled rubber consists of reducing rubber to powder which it put into mold and heating in two stages

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FR0406091A FR2871090A1 (en) 2004-06-07 2004-06-07 Procedure for making articles from recycled rubber consists of reducing rubber to powder which it put into mold and heating in two stages

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2327271A1 (en) * 1973-05-29 1975-01-02 Lab Himmelheber Gmbh & Co Kg Moulding material formed by grinding used vehicle tyres - to fine powder in which the rubber and textile particles are indistinguishable to the eye
JPS53134080A (en) * 1977-04-28 1978-11-22 Toyoda Gosei Kk Method for making rubber sheet
DE9403465U1 (en) * 1994-03-02 1994-05-19 Ludwig Georg Compacts from shredded waste products
WO1999028105A1 (en) * 1997-12-04 1999-06-10 Illinois Institute Of Technology Process for recycling of rubber materials
EP1195237A2 (en) * 1994-10-14 2002-04-10 Biomet, Inc. Method for processing thermoplastics, thermosets and elastomers
WO2003037732A1 (en) * 2001-10-26 2003-05-08 Radke Dan R Jr Molding material and products made from recycled scrap tires

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2327271A1 (en) * 1973-05-29 1975-01-02 Lab Himmelheber Gmbh & Co Kg Moulding material formed by grinding used vehicle tyres - to fine powder in which the rubber and textile particles are indistinguishable to the eye
JPS53134080A (en) * 1977-04-28 1978-11-22 Toyoda Gosei Kk Method for making rubber sheet
DE9403465U1 (en) * 1994-03-02 1994-05-19 Ludwig Georg Compacts from shredded waste products
EP1195237A2 (en) * 1994-10-14 2002-04-10 Biomet, Inc. Method for processing thermoplastics, thermosets and elastomers
WO1999028105A1 (en) * 1997-12-04 1999-06-10 Illinois Institute Of Technology Process for recycling of rubber materials
WO2003037732A1 (en) * 2001-10-26 2003-05-08 Radke Dan R Jr Molding material and products made from recycled scrap tires

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