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    • 4. 发明申请
    • METHOD FOR PRODUCING A COATING LAYER MADE OF EXPANDABLE AND CROSS-LINKABLE MATERIAL IN A CABLE
    • 用于生产电缆中可扩展和可交联材料的涂层的方法
    • WO2004057626A1
    • 2004-07-08
    • PCT/IT2002/000824
    • 2002-12-23
    • PIRELLI & C. S.P.A.BALCONI, LucaBAREGGI, AlbertoBELLI, Sergio
    • BALCONI, LucaBAREGGI, AlbertoBELLI, Sergio
    • H01B13/14
    • H01B13/145B29C47/0004B29C47/0016B29C47/025B29C47/8805B29K2301/10H01B9/027
    • A method is described for producing a cable (1, 101) including: at least one transmissive element (2), such as for example an element transmitting electrical energy or optionally optical signals as well; and an expanded and cross-linked coating layer (5) in a radially outer position with respect to said at least one transmissive element (2), said coating layer (5) comprising a composition including an expandable and cross-linkable polymeric material. The method comprises the following steps of: a) extruding the composition; b) forming a coating layer made of expandable and cross-linkable polymeric material with the composition thus extruded; c) expanding the coating layer made of expandable and cross-linkable polymeric material; and d) cross-linking the above-mentioned coating layer made of expandable and cross-linkable polymeric material. The method of the invention provides that the above-mentioned expanding and cross-linking steps c) and d) are carried out by heating the coating layer made of expandable and cross-linkable polymeric material at atmospheric pressure by means of a suitable heating fluid. The method of the invention allows to attain a saving in production time and costs with respect to the prior art methods.
    • 描述了一种用于产生电缆(1,101)的方法,包括:至少一个透射元件(2),例如传输电能或可选地光信号的元件; 以及相对于所述至少一个透射元件(2)在径向外部位置的膨胀和交联的涂层(5),所述涂层(5)包括包含可膨胀和可交联的聚合材料的组合物。 该方法包括以下步骤:a)挤出组合物; b)形成由可膨胀和可交联的聚合物材料制成的涂层,由此挤出组合物; c)使可膨胀和可交联聚合材料制成的涂层膨胀; 和d)交联上述由可膨胀和可交联的聚合物材料制成的涂层。 本发明的方法提供了上述膨胀和交联步骤c)和d)通过借助于合适的加热流体在大气压下加热由可膨胀和可交联的聚合物材料制成的涂层来进行。 本发明的方法允许在现有技术方法中节省生产时间和成本。
    • 6. 发明申请
    • METHOD AND EXTRUSION HEAD FOR EXTRUDING A POLYMERIC MATERIAL
    • 挤出聚合材料的方法和挤出头
    • WO2003061944A1
    • 2003-07-31
    • PCT/IT2001/000653
    • 2001-12-21
    • PIRELLI S.p.A.CASTIGLIONI, ValterRIELLA, AngeloBELLI, SergioBALCONI, Luca
    • CASTIGLIONI, ValterRIELLA, AngeloBELLI, SergioBALCONI, Luca
    • B29C47/28
    • B29C47/28B29C47/0016B29C47/0808
    • An extrusion method and head (1) for depositing by extrusion a polymeric material intended, in particular, for the production of cables including a core and a coating layer arranged at a radially outer position with respect of the core, are described. The method of the invention comprises the steps of feeding the polymeric material in a feeding duct (10) of the extrusion head (1) and of conveying a part of the polymeric material towards an undercut (17) extending in the extrusion head (1) in proximity of an end of said feeding duct (10). Said a method provides that a sealing force between a head body (2) and a conveyor element (3) of the extrusion head (1) is exerted by means of the pushing action exerted by the polymeric material in said undercut (17) in a direction substantially perpendicular to the longitudinal axis of the head body (2).
    • 描述了一种用于通过挤出沉积聚合物材料的挤出方法和头部(1),特别是用于生产包括相对于芯部的径向外部位置处的芯和涂层的电缆。 本发明的方法包括以下步骤:将聚合物材料供给到挤出头(1)的进料管道(10)中,并将聚合物材料的一部分朝着在挤出头(1)中延伸的底切(17)输送, 在所述进料管道(10)的端部附近。 所述方法规定,头体(2)和挤出头(1)的输送元件(3)之间的密封力通过由所述底切(17)中的聚合物材料施加的推动作用 大致垂直于头体(2)的纵向轴线的方向。