BR102016005628B1 - CONFORMATION PROCESS OF POLYMERIC SOLE AND MIDDLE USING HIGH FREQUENCY - Google Patents

CONFORMATION PROCESS OF POLYMERIC SOLE AND MIDDLE USING HIGH FREQUENCY Download PDF

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BR102016005628B1
BR102016005628B1 BR102016005628-4A BR102016005628A BR102016005628B1 BR 102016005628 B1 BR102016005628 B1 BR 102016005628B1 BR 102016005628 A BR102016005628 A BR 102016005628A BR 102016005628 B1 BR102016005628 B1 BR 102016005628B1
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high frequency
eva
mold
midsoles
temperature
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BR102016005628-4A
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Portuguese (pt)
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BR102016005628A2 (en
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Jeferson Leandro Maus
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Orisol Do Brasil Indústria E Comércio De Máquinas Ltda
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Priority to BR102016005628-4A priority Critical patent/BR102016005628B1/en
Priority to PCT/BR2017/050019 priority patent/WO2017156604A1/en
Publication of BR102016005628A2 publication Critical patent/BR102016005628A2/en
Publication of BR102016005628B1 publication Critical patent/BR102016005628B1/en

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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B3/00—Footwear characterised by the shape or the use
    • A43B3/12—Sandals; Strap guides thereon
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/12—Soles with several layers of different materials
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B17/00—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B17/00—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
    • A43B17/02—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined wedge-like or resilient
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B17/00—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
    • A43B17/14—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined made of sponge, rubber, or plastic materials
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B9/00—Footwear characterised by the assembling of the individual parts
    • A43B9/16—Footwear with soles moulded on to uppers or welded on to uppers without adhesive
    • A43B9/18—Footwear with soles moulded on to uppers or welded on to uppers without adhesive moulded
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/12—Dielectric heating
    • 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
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • 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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00—Producing footwear
    • B29D35/12—Producing parts thereof, e.g. soles, heels, uppers, by a moulding technique
    • B29D35/14—Multilayered parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L31/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid; Compositions of derivatives of such polymers
    • C08L31/02—Homopolymers or copolymers of esters of monocarboxylic acids
    • C08L31/04—Homopolymers or copolymers of vinyl acetate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00—Producing footwear
    • B29D35/0054—Producing footwear by compression moulding, vulcanising or the like; Apparatus therefor

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

SISTEMA E PROCESSO DE CONFORMAÇÃO DE SOLAS E ENTRESSOLAS POLIMÉRICAS UTILIZANDO ALTA-FREQUÊNCIA. É descrito um sistema e um processo de conformação de solas e entressolas de EVA (Copolímero de Etileno-Acetato de Vinila) utilizando alta-frequência e uma pré-forma de EVA injetada ou vulcanizada na região interna de um molde convencional com paredes revestidas com material isolante, dito molde em compressão e aquecido à temperatura de 80°C a 120°C, durante 02 a 04 minutos, seguido do resfriamento do EVA mantido comprimido à temperatura entre 25°C e 35°C, garantindo a estabilidade dimensional e geométrica da peça de EVA.SYSTEM AND PROCESS FOR CONFORMING POLYMERIC SOLE AND MIDSOLES USING HIGH FREQUENCY. A system and a process for forming EVA soles and midsoles (Ethylene-Vinyl Acetate Copolymer) using high frequency and an injected or vulcanized EVA preform in the internal region of a conventional mold with walls coated with material is described. insulation, said compression mold and heated to a temperature of 80°C to 120°C, for 2 to 4 minutes, followed by cooling the EVA kept compressed at a temperature between 25°C and 35°C, ensuring the dimensional and geometric stability of the EVA part.

Description

CAMPO DA INVENÇÃOFIELD OF THE INVENTION

[01] A presente invenção descreve um processo de conformação de solas e entressolas de EVA (Copolímero de Etileno-Acetato de Vinila) utilizando alta-frequência que provê estabilidade dimensional e geométrica, visto que o aquecimento da peça de EVA é realizada de “dentro para fora” pela ação da alta frequência no molde, e posterior estabilização pelo resfriamento com o molde fechado.[01] The present invention describes a process for forming EVA soles and midsoles (Ethylene-Vinyl Acetate Copolymer) using high frequency that provides dimensional and geometric stability, since the heating of the EVA piece is carried out “inside the out” by the action of high frequency in the mold, and subsequent stabilization by cooling with the mold closed.

ANTECEDENTES DA INVENÇÃOBACKGROUND OF THE INVENTION

[02] Os materiais poliméricos são utilizados na indústria calçadista geralmente em calçados esportivos, sapatos masculinos, femininos, entressolas dos tênis, calçados de segurança, palmilhas especiais, entre outros.[02] Polymeric materials are used in the footwear industry, usually in sports shoes, men's and women's shoes, tennis midsoles, safety shoes, special insoles, among others.

[03] A resina de EVA é material de custo relativamente baixo, utilizada em solados, sandálias, palmilhas e entressolas de calçados de menor preço final. Trata-se de um material esponjoso e elástico, com a aparência de borracha, possuindo alguma capacidade de voltar a sua forma original.[03] EVA resin is a relatively low cost material, used in soles, sandals, insoles and midsoles of shoes with a lower final price. It is a spongy and elastic material, with the appearance of rubber, having some ability to return to its original shape.

[04] A moderna tecnologia do EVA injetado apresenta altíssima resistência, durabilidade, resiliência, flexibilidade e leveza, sendo em média 40% mais leve que o poliuretano (PU) e entre 30 a 80% mais leve que a borracha.[04] The modern technology of injected EVA has very high strength, durability, resilience, flexibility and lightness, being on average 40% lighter than polyurethane (PU) and between 30 to 80% lighter than rubber.

[05] No processo de injeção direta de EVA para a conformação de entressolas e solados, as dificuldades dizem respeito ao ganho de produtividade em decorrência da limitação das injetoras, além dos altos custos de energia e outros problemas técnicos, tal como variações de molde devido as alterações de temperatura no canhão de injeção (queima de resistências, ajustes sequenciais), excesso de temperaturas e cisalhamento ao qual o composto é exposto no canhão de injeção, tempos de injeção diferenciados e variações de tamanho no artefato devido à má regulagem de caudal e velocidade de injeção; dificuldade na extração do ar pelos canais de vácuo e limitação na produção de cores, que permitem o máximo de duas cores por equipamento, ao mesmo tempo.[05] In the process of direct injection of EVA for the conformation of midsoles and soles, the difficulties relate to the productivity gain due to the limitation of the injectors, in addition to the high energy costs and other technical problems, such as mold variations due to temperature changes in the injection nozzle (burning resistors, sequential adjustments), excess temperatures and shear to which the compound is exposed in the injection nozzle, different injection times and size variations in the artifact due to poor flow regulation and injection speed; difficulty in extracting air through the vacuum channels and limitation in color production, which allow a maximum of two colors per equipment at the same time.

[06] Uma alternativa é o processo de EVA Derramado Direto na Matriz, que necessita de baixo investimento inicial em máquinas, equipamentos e matrizes, devido ao processo ser bem menos complexo que o de Injeção Direta.[06] An alternative is the EVA process directly poured into the die, which requires low initial investment in machines, equipment and dies, due to the process being much less complex than the direct injection process.

[07] No entanto, estes processos levam de 15 a 25 minutos, incluindo o aquecimento do EVA, a compressão e a introdução no molde. Para o aquecimento, é utilizado o calor gerado por resistências elétricas ou vapor e resfriamento com água ou utilizando fornos estabilizadores, impactando em custos elevados de energia e de água, que oneram o processo produtivo.[07] However, these processes take 15 to 25 minutes, including heating the EVA, compressing it and inserting it into the mold. For heating, the heat generated by electrical resistances or steam is used and cooling with water or using stabilizing ovens, impacting on high energy and water costs, which burden the production process.

[08] O estado da técnica descreve processos de conformação de partes de calçados utilizando alta-frequência como fonte geradora de calor para a moldagem.[08] The state of the art describes processes for forming parts of footwear using high frequency as a source of heat for molding.

[09] A anterioridade ES2069464 descreve um processo de obtenção de sandálias e/ou chinelo que inclui uma lâmina inferior de material sintético, uma lâmina superior de recobrimento da base do pé, e entre elas uma cunha de um material granular de borracha e cortiça para vulcanização mediante alta frequência em um molde.[09] Priority ES2069464 describes a process for obtaining sandals and/or flip-flops that includes a lower sheet of synthetic material, an upper sheet of covering the base of the foot, and between them a wedge of a granular material of rubber and cork to high frequency vulcanization in a mold.

[010] A anterioridade JPH01126906 descreve uma matriz onde são colocadas folhas de copolímero de acetato de vinila de uma forma especificada e a matriz é aquecida por um método de aquecimento de alta frequência, ultrassônico ou outro, sendo soldadas a matriz superior e as peças. Todo o corpo da sola interna soldada é irradiado por raios radiais e o copolímero de vinil é reticulado com ácido etileno-acético. Após a radiação dos raios radiais, uma quantidade especificada de água é preenchida e, em seguida, uma parte não soldada é soldada.[010] Priority JPH01126906 describes a matrix where vinyl acetate copolymer sheets are placed in a specified way and the matrix is heated by a high frequency, ultrasonic or other heating method, and the upper matrix and parts are welded. The entire body of the welded insole is irradiated by radial rays and the vinyl copolymer is cross-linked with ethylene-acetic acid. After the radiation of radial rays, a specified amount of water is filled, and then an unsoldered part is welded.

[011] A anterioridade ES2027609 descreve um processo aplicável à obtenção de calçados que incluem uma cunha, uma folha inferior de espessura uniforme que constitui a sola, uma folha superior muito fina de couro ou semelhante que constitui a superfície de suporte do pé e a parte superior correspondente, de maneira que essas peças devem ser fixadas juntas, e a cunha, formada preferencialmente de borracha e cortiça, deve ser vulcanizada em um molde no qual é colocada, por sua vez, a folha de couro para que possa ser fixada à peça que constitui a cunha. O processo de acordo com a invenção consiste em vulcanização de alta frequência, durante a qual o molde correspondente contendo a mistura granular de borracha e cortiça para formar a cunha, a folha de couro, a parte superior e a folha que forma a sola são colocados dentro a máquina de alta frequência para a vulcanização da borracha e, além disso, a fixação das referidas peças e a obtenção de calçados totalmente acabados que saem após uma única etapa operacional.[011] Priority ES2027609 describes a process applicable to obtaining footwear that includes a wedge, a lower sheet of uniform thickness that constitutes the sole, a very thin upper sheet of leather or similar that constitutes the support surface of the foot and the corresponding top, so that these pieces must be fixed together, and the wedge, preferably made of rubber and cork, must be vulcanized in a mold in which the leather sheet is placed, in turn, so that it can be fixed to the piece. which constitutes the wedge. The process according to the invention consists of high frequency vulcanization, during which the corresponding mold containing the granular mixture of rubber and cork to form the wedge, the leather sheet, the upper part and the sheet forming the sole are placed. inside the high-frequency machine for the vulcanization of the rubber and, in addition, the fixing of said parts and obtaining fully finished shoes that come out after a single operational step.

[012] A anterioridade CN101239491 descreve um molde de resina e o respectivo método de fabricação, sendo o molde aplicável a processos por injeção, prensagem a quente, prensagem a frio, fundição, etc., especialmente adequada para TPR, TR, PU, TPU, EVA, RB, alta frequência, entre outros.[012] Priority CN101239491 describes a resin mold and its manufacturing method, the mold being applicable to injection processes, hot pressing, cold pressing, casting, etc., especially suitable for TPR, TR, PU, TPU , EVA, RB, high frequency, among others.

[013] Em que pese as anterioridades anteciparem a disposição de um artigo de material elastomérico e/ou EVA na região interna de um molde para se fundir por meio de alta frequência, se conformando à forma final do molde, nenhuma das anterioridades propõe uma pré-forma injetada de EVA que aquece conjuntamente com o molde, através de alta frequência, adquirindo a geometria do molde, contornando as dificuldades e/ou desvantagens dos convencionais processos de injeção direta ou derramamento direto na matriz, e obtendo um processo de menor custo e mais rápido (cerca de 60% menor que no processo tradicional) e um produto final com características similares à borracha, de altíssima resistência, durabilidade, resiliência, mais leve que o poliuretano e a borracha e com estabilidade dimensional. SUMÁRIO[013] In spite of the prior art anticipating the disposition of an article of elastomeric material and/or EVA in the internal region of a mold to be melted by means of high frequency, conforming to the final shape of the mold, none of the prior art proposes a pre -injected form of EVA that heats together with the mold, through high frequency, acquiring the geometry of the mold, bypassing the difficulties and/or disadvantages of the conventional processes of direct injection or direct pouring in the matrix, and obtaining a process of lower cost and faster (about 60% smaller than in the traditional process) and a final product with characteristics similar to rubber, of very high resistance, durability, resilience, lighter than polyurethane and rubber and with dimensional stability. SUMMARY

[014] A invenção descreve um processo de conformação de solas e entressolas poliméricas utilizando alta-frequência que diminui o tempo de produção em 60%, levando entre 4 a 6 minutos para a conformação do bloco.[014] The invention describes a process for shaping polymer soles and midsoles using high frequency that reduces production time by 60%, taking between 4 to 6 minutes for the shaping of the block.

[015] A invenção descreve um processo de conformação de solas e entressolas poliméricas utilizando alta-frequência que diminui o consumo de energia em 30%.[015] The invention describes a process for shaping polymer soles and midsoles using high frequency that reduces energy consumption by 30%.

[016] A invenção descreve um processo de conformação de solas e entressolas poliméricas utilizando alta-frequência que provê estabilidade dimensional e geométrica, visto que o aquecimento do solado é realizado de “dentro para fora” pela ação da alta frequência e posterior estabilização pelo resfriamento com o molde fechado, ao passo que no processo de injeção convencional a estabilização ocorre após a retirada da sola ou entressola do molde.[016] The invention describes a process of shaping polymeric soles and midsoles using high frequency that provides dimensional and geometric stability, since the heating of the sole is carried out from the "inside out" by the action of high frequency and subsequent stabilization by cooling. with the mold closed, whereas in the conventional injection process, stabilization occurs after the sole or midsole is removed from the mold.

[017] A invenção descreve um processo de conformação de solas e entressolas poliméricas utilizando alta-frequência com menor custo de moldes, pois, com o ciclo do processo diminuído, não se faz necessário um grande número de moldes.[017] The invention describes a process for shaping polymer soles and midsoles using high frequency with lower mold costs, because, with the process cycle reduced, a large number of molds is not necessary.

DESCRIÇÃO DETALHADA DA INVENÇÃODETAILED DESCRIPTION OF THE INVENTION

[018] O processo de conformação de solas e entressolas poliméricas utilizando alta-frequência, objeto da presente invenção, inclui a utilização de um molde convencional com paredes revestidas com material isolante para direcionar a energia de alta frequência para o material em EVA que está sendo conformado e sensores para monitorar temperatura do EVA e promover a retirada de gases.[018] The process of forming polymeric soles and midsoles using high frequency, object of the present invention, includes the use of a conventional mold with walls coated with insulating material to direct high frequency energy to the EVA material being conformation and sensors to monitor the EVA temperature and promote the removal of gases.

[019] Na região interna do molde de EVA é posicionada uma pré-forma de EVA injetada ou vulcanizada, dita pré-forma dimensionada conforme o molde em que será inserida.[019] In the inner region of the EVA mold, an injected or vulcanized EVA preform is positioned, said preform dimensioned according to the mold in which it will be inserted.

[020] O processo de conformação de solas e entressolas poliméricas utilizando alta-frequência compreende o aquecimento do molde conjuntamente com a pré-forma de EVA mediante o uso de alta- frequência à temperatura de 80oC a 120oC, durante 02 a 04 minutos, sendo mantido em compressão. Nessa etapa, a pré-forma de EVA sofre amolecimento e adquire a geometria do molde no qual dita pré-forma está posicionada.[020] The process of shaping polymeric soles and midsoles using high frequency comprises heating the mold together with the EVA preform using high frequency at a temperature of 80oC to 120oC, for 02 to 04 minutes, being held in compression. In this step, the EVA preform undergoes softening and acquires the geometry of the mold in which said preform is positioned.

[021] O EVA é mantido comprimido e resfriado à temperatura entre 25°C e 35°C para estabilização geométrica e dimensional, seguindo para desmoldagem.[021] The EVA is kept compressed and cooled at a temperature between 25°C and 35°C for geometric and dimensional stabilization, followed by demolding.

Claims (1)

1. PROCESSO DE CONFORMAÇÃO DE SOLAS E ENTRESSOLAS POLIMÉRICAS UTILIZANDO ALTA-FREQUÊNCIA caracterizado por compreender as etapas de:a) posicionamento de uma pré-forma de EVA injetada ou vulcanizada em um molde com paredes revestidas com material isolante;b) aquecimento do molde conjuntamente com a pré-forma de EVA mediante o uso de alta-frequência à temperatura de 80oC a 120oC, durante 02 a 04 minutos, sendo mantido em compressão;c) resfriamento do molde mantido comprimido à temperatura entre 25°C e 35°C;d) desmoldagem.1. CONFORMATION PROCESS OF POLYMERIC SOLE AND MIDSOLES USING HIGH FREQUENCY characterized by comprising the steps of: a) positioning an injected or vulcanized EVA preform in a mold with walls coated with insulating material; b) heating the mold together with the EVA preform using high frequency at a temperature of 80oC to 120oC, for 2 to 4 minutes, being kept in compression; c) cooling of the mold kept compressed at a temperature between 25°C and 35°C; d) demoulding.
BR102016005628-4A 2016-03-15 2016-03-15 CONFORMATION PROCESS OF POLYMERIC SOLE AND MIDDLE USING HIGH FREQUENCY BR102016005628B1 (en)

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PCT/BR2017/050019 WO2017156604A1 (en) 2016-03-15 2017-02-03 System and method using high frequency for shaping polymeric soles and midsoles

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JPH01126906A (en) * 1987-11-11 1989-05-19 Nippon Health Supply:Kk Insole
FR2655656B1 (en) * 1989-12-07 1992-03-06 Socaplast Sa FILMS BASED ON POLYETHYLENE RESIN AND E.V.A. LOADED, WELDABLE AT HIGH FREQUENCY, AND PRODUCTS OBTAINED BY THE USE OF THESE FILMS.
ES2027609A6 (en) * 1991-01-25 1992-06-01 Catala Molina Juan Jose Process for making footwear
ES2069464B1 (en) * 1993-04-05 1996-03-01 Molina Juan Jose Catala PROCEDURE FOR THE CONFECTION OF FOOTWEAR.
KR960013055B1 (en) * 1993-04-08 1996-09-30 임성조 Shoes
JPH11113607A (en) * 1997-10-16 1999-04-27 Techno Star:Kk Novel shoe sole
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