MX2023001887A - Dispositivos de moldeo y metodos para elaborar almohadillas elastomericas para usarse como uniones de riel. - Google Patents

Dispositivos de moldeo y metodos para elaborar almohadillas elastomericas para usarse como uniones de riel.

Info

Publication number
MX2023001887A
MX2023001887A MX2023001887A MX2023001887A MX2023001887A MX 2023001887 A MX2023001887 A MX 2023001887A MX 2023001887 A MX2023001887 A MX 2023001887A MX 2023001887 A MX2023001887 A MX 2023001887A MX 2023001887 A MX2023001887 A MX 2023001887A
Authority
MX
Mexico
Prior art keywords
molding
planar surface
substantially planar
elastomeric pad
microcellular foam
Prior art date
Application number
MX2023001887A
Other languages
English (en)
Inventor
Larry Dotson
Larry W Mobley
Yinglong Chen
Huang Wu
Jason A Reese
Kevin W Light
Maria-Jose Cotanda
Original Assignee
Dow Global Technologies Llc
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 Dow Global Technologies Llc filed Critical Dow Global Technologies Llc
Publication of MX2023001887A publication Critical patent/MX2023001887A/es

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B3/00—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails
    • E01B3/46—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from different materials
    • 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
    • B29C44/35—Component parts; Details or accessories
    • B29C44/351—Means for preventing foam to leak out from the foaming device during foaming
    • 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
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • 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
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/1271—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed parts being partially covered
    • 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
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, 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
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B29K2105/041—Microporous

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Railway Tracks (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

La presente invención proporciona artículos de capas múltiples para usarse como pies de unión de riel que comprenden, como la unión, un cuerpo rígido alargado que tiene una superficie sustancialmente plana, y sobre la superficie sustancialmente plana que comprende una almohadilla elastomérica de espuma microcelular, por ejemplo, de un poliuretano libre de solvente sustancialmente orgánico, en donde la superficie sustancialmente plana tiene un rellano periférico en el cual no hay almohadilla elastomérica y la almohadilla elastomérica tiene una densidad a granel (ASTM D3676) de 600 a 2000 Kg/m3 (0.6 a 2.0 g/cm3). Además, la presente invención proporciona métodos de moldeo en donde la almohadilla elastomérica de espuma microcelular se moldea directamente sobre la unión de riel para formar un pie durable, en donde la unión de riel forma el límite inferior de una cámara de moldeo durante el moldeo y el moldeo comprende formar los límites superior y lateral de la cámara de moldeo al inflar un sello neumático anular, posicionar el sello en la superficie sustancialmente plana del cuerpo rígido alargado y mantener los materiales formadores de espuma microcelular bajo presión durante el moldeo.
MX2023001887A 2020-09-01 2021-08-30 Dispositivos de moldeo y metodos para elaborar almohadillas elastomericas para usarse como uniones de riel. MX2023001887A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202063072987P 2020-09-01 2020-09-01
PCT/US2021/048170 WO2022051208A1 (en) 2020-09-01 2021-08-30 Molding devices and methods for making elastomeric pads for use as rail ties

Publications (1)

Publication Number Publication Date
MX2023001887A true MX2023001887A (es) 2023-03-10

Family

ID=78073995

Family Applications (1)

Application Number Title Priority Date Filing Date
MX2023001887A MX2023001887A (es) 2020-09-01 2021-08-30 Dispositivos de moldeo y metodos para elaborar almohadillas elastomericas para usarse como uniones de riel.

Country Status (4)

Country Link
US (1) US20230228040A1 (es)
CA (1) CA3191144A1 (es)
MX (1) MX2023001887A (es)
WO (1) WO2022051208A1 (es)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4302552A (en) * 1980-07-01 1981-11-24 Nisshin Spinning Co., Ltd. Microcellular polyurethane vibration isolator
FR2732046B1 (fr) * 1995-03-20 1997-06-20 Vagneux Traverses Beton Procede de fabrication d'un support de rail de chemin de fer, et support susceptible d'etre obtenu par la mise en oeuvre de ce procede.
KR100699548B1 (ko) * 2005-08-31 2007-03-23 한국철도기술연구원 철도 자갈궤도용 방진침목패드
DE102006015184A1 (de) * 2006-04-01 2007-10-11 Krauss-Maffei Kunststofftechnik Gmbh Aufblasbare Dichtvorrichtung für ein Formwerkzeug
WO2008101269A1 (de) 2007-02-22 2008-08-28 Ssl-Schwellenwerk Und Steuerungstechnik Linz Gmbh Verfahren zum herstellen einer schwellenbesohlung auf einem schwellenkörper sowie schwelle
AT510274B1 (de) * 2010-10-04 2012-03-15 Getzner Werkstoffe Holding Gmbh Verfahren zum anschäumen einer kunststoffschaumschicht
CN105401492B (zh) * 2015-12-22 2017-02-01 成都市新筑路桥机械股份有限公司 一种用于嵌入式轨道***的防水减振复合结构及施工方法
JP6674504B2 (ja) * 2018-06-07 2020-04-01 株式会社イノアックコーポレーション まくらぎ用パッド

Also Published As

Publication number Publication date
WO2022051208A1 (en) 2022-03-10
US20230228040A1 (en) 2023-07-20
CA3191144A1 (en) 2022-03-10

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