CN105051430A - 一种无需炉后固化形成的弹性密封件以及形成弹性密封件的方法 - Google Patents

一种无需炉后固化形成的弹性密封件以及形成弹性密封件的方法 Download PDF

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CN105051430A
CN105051430A CN201480017493.8A CN201480017493A CN105051430A CN 105051430 A CN105051430 A CN 105051430A CN 201480017493 A CN201480017493 A CN 201480017493A CN 105051430 A CN105051430 A CN 105051430A
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elastomeric compounds
seal ring
elastomer
seal
forming unit
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CN105051430B (zh
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俊锋·边
罗杰·霍利迪
巴瓦尼·崔帕西
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Federal Mogul LLC
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    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/082—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising vinyl resins; comprising acrylic resins
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Abstract

一种弹性密封件(20)，例如用作汽车领域的轴密封，包括：化学结合至金属密封环(24)上的弹性化合物(22)，并且无需炉后固化步骤形成。该弹性密封件(20)提供与现有技术中采用炉后固化步骤形成的弹性密封件相似的优良的物理性能。该弹性密封件(20)具有6.0MPa～13.0MPa的弹性模量以及11.1MPa～14.8MPa的拉伸强度。该弹性化合物(22)包括52.0～68.0wt％的含氟弹性体，20.0～35.0wt％的硅酸钙，以及5.0～15.0wt％的硅藻土。该弹性化合物(22)在压塑或注射成型步骤中完全固化并化学结合至金属密封环(24)上而无需炉后固化步骤。本发明还涉及一种用于形成弹性密封件的方法。

Description

一种无需炉后固化形成的弹性密封件以及形成弹性密封件的方法
技术领域
本发明涉及一种弹性密封件，例如用于汽车领域的轴密封，以及形成该弹性密封件的方法。
背景技术
弹性密封件，例如用于汽车领域的轴密封，通常包括通过化学结合到金属密封环上的弹性化合物。该弹性化学物可包括各种弹性体，聚合物，以及填充剂，例如聚丙烯酸酯，乙烯丙烯酸，以及含氟弹性体。费德罗-莫格尔公司提供了多种这样的弹性密封件的实例。
现有技术中的弹性密封件通过将弹性化合物成型到金属密封环上，然后在成型步骤之后将该弹性密封件进行炉后固化至该弹性化合物被完全固化并化学结合到金属密封环上形成。该炉后固化步骤的条件根据弹性化合物的种类，以及弹性化合物的厚度和几何结构不同而变化。通常，该炉后固化步骤在炉体中最低温度170℃下进行1～24小时，或者更长。因此，该炉后固化步骤涉及大量的资本投入，人工成本，能量消耗，以及该弹性密封件制造商的其他负担。
发明内容
根据本发明的一个方面，提供一种用于形成弹性密封件的方法。该方法包括将弹性化合物成型到密封环上。该弹性化合物包括，占该弹性化合物的重量百分比的，52.0～68.0wt％的含氟弹性体，并且该密封环包括金属材料。该方法还包括在成型步骤中将该弹性化合物化学结合到密封环上而无需在成型步骤之后进行炉后固化步骤。
根据本发明的另一方面，提供一种包括密封环和弹性化合物的弹性密封件。该密封环包括金属材料，并具有绕一中心轴延伸的多个表面，并且该弹性化合物被化学结合至所述表面中的至少一个。该弹性化合物包括，占所述弹性化合物的重量百分比的，52.0～68.0wt％的含氟弹性体。此外，该弹性密封件通过包括以下步骤的工艺制造：将弹性化合物成型到密封环上，并将弹性化合物化学结合到密封环上，其中，该化学结合步骤在成型步骤中进行而无需在成型步骤之后进行炉后固化步骤。
通过取消该炉后固化步骤，本发明避免了在炉后固化设备中的资本投入，执行炉后固化步骤的人工成本，以及在炉后固化步骤用于加热弹性密封件的能量消耗。该弹性密封件还提供了优良的物理性能，包括与现有技术中通过炉后固化步骤制造的弹性密封件相似的拉伸强度和弹性模量。
附图说明
结合附图以及参考以下详细说明，本发明的其他优点将更易于领会，以及更好地理解，其中：
图1是根据本发明的一个实施例的弹性密封件的俯视图；以及
图2是如图1所示的弹性密封件的仰视图。
具体实施方式
本发明的一个方面提供了一种形成弹性密封件20的方法，如图1和图2中所示的弹性密封件20，用于密封和保护汽车应用中的金属轴(未示出)免受油和杂物的污染。该弹性密封件20包括弹性化合物22，该弹性化合物22包括化学结合到金属密封环24上的含氟弹性体(FKM)。该用于形成弹性密封件20的方法包括：在一成型步骤中将弹性化合物22化学结合到金属密封环24上并无需炉后固化步骤。通过取消该炉后固化步骤，与现有技术中要求炉后固化步骤的弹性密封件的形成方法相比，其资本投入，人工成本，能量消耗均大幅降低。
该形成弹性密封件20而无需炉后固化步骤的方法首先包括提供弹性化合物22。在一优选实施例中，该弹性化合物22包括占弹性化合物22的52.0～68.0wt％的FKM。该弹性化合物包括至少52.0wt％的FKM，或不超过68.0wt％的FKM。该FKM是六氟丙烯和偏二氟乙烯的二聚体。该FKM可通过以下供应商获得：杜邦，苏威苏莱克斯，3M，大金，以及其他FKM供应商。
该弹性化合物22还包括允许该弹性密封件20被形成而无需炉后固化步骤的多种预定含量的其他化合物。在一个实施例中，该弹性化合物22包括20.0～35.0wt％的硅酸钙，或至少20.0wt％的硅酸钙，或不超过35.0wt％的硅酸钙。该弹性化合物22还包括5.0～15.0wt％的硅藻土，或至少5.0wt％的硅藻土，或不超过15.0wt％的硅藻土。在一个实施例中，该弹性化合物22包括1.0～5.0wt％的炭黑，或至少1.0wt％的炭黑，或不超过5.0wt％的炭黑。该弹性化合物22还典型地包括0.5～3.0wt％的双酚AF，其IUPAC命名为4-[1,1,1,3,3,3-六氟-2-(4-羟苯基)-2-丙基]苯酚。该弹性化合物22还典型地包括0.1～0.5wt％的催化剂。该催化剂是一种可提高化学反应速率的物质。优选的催化剂是一种鎓盐催化剂，例如1-氯-N,N-二乙基-1,1-二苯基-1-(苄基)磷胺，或苄基三苯基氯化膦。该弹性化合物22典型地是双酚固化的并且含有0.5～3.0wt％的双酚AF和0.1～0.5wt％的鎓盐催化剂。
该弹性化合物22还典型地包括允许该弹性密封件20被形成而无需炉后固化步骤的预定含量的金属氧化物。在一个实施例中，该弹性化合物22包括4.0～10.0wt％的金属氧化物，或至少4.0wt％的金属氧化物，或不超过10.0wt％的金属氧化物。例如，该弹性化合物22可包括氧化镁，氧化钙，以及氢氧化钙。在该实施例中，该弹性化合物22可包括3.0～5.0wt％的氧化镁，0.5～2.0wt％的氧化钙，以及0.3～3.0wt％的氢氧化钙。
该弹性化合物22还典型地包括允许该弹性密封件20被形成而无需炉后固化步骤的预定含量的加工助剂。在一个实施例中，该弹性化合物22包括0.2～2.0wt％的加工助剂，或至少0.2wt％的加工助剂，或不超过2.0wt％的加工助剂。在一个实施例中，该加工助剂包括蜡，脂肪酸衍生物，有机硅酮，含氟聚醚衍生物，以及十八烷基胺中的至少一种。
该提供具有如上所述组成的弹性化合物22的方法典型地包括将这些化合物在混合器中混合，例如密炼机，或开炼机，以形成该弹性化合物22。随后该弹性化合物22被碾压成片材并被制备用于成型到密封环24上。在一个实施例中，该弹性化合物22的片材被切割成环形预制件。在另一实施例中，该弹性体被切割成大量条状物。
该方法的另一预备步骤包括提供密封环24。该密封环24可包括多种不同构造，包括现有技术中的任意构造。该密封环24具有分别围绕中心轴A周向延伸的顶面和相对的底面。该密封环24还提供面向中心轴A的内径表面和相对的外径表面。该内径表面和外径表面可从密封环的顶面纵向延伸至底面。该密封环24典型地由金属材料形成，包括现有技术中的任意金属材料，例如钢。在一个实施例中，通过清洁该密封环24的表面，或通过施加粘合剂或胶水(未示出)到密封环24上，对该密封环24进行准备工作，以便于进行成型步骤。
该形成弹性密封件20的方法接下来还包括将该弹性化合物22成型到密封环24上。该步骤首先包括将弹性化合物22和密封环24放置于成型装置中，并将弹性化合物22放置于密封环24上。在一个实施例中，该成型步骤包括压塑成型。在本实施例中，该弹性化合物22提供为环形预制件。该环形在径向和轴向上的厚度根据应用的不同而变化，但是通常是在毫米量级。该环形预制件随后被放置于压塑模具中的密封环24上。在另一实施例中，该成型步骤包括注射成型，以及将弹性化合物22提供为多个条状物。该条状物在径向和轴向上的厚度也根据应用的不同而变化，但是通常是在毫米量级。该条状物可被注射到模具中并在模具中与密封环24接触。
如上所述，该形成弹性密封件20无需炉后固化步骤的方法包括在成型步骤中将弹性化合物22化学结合至密封环24的至少一个表面上。该化学结合步骤在成型步骤之后无需炉后固化步骤即可完成。这里描述的弹性化合物22的组成以及工艺步骤允许弹性密封件20无需炉后固化步骤形成，避免了在炉后固化设备中的大量资本投入，执行炉后固化步骤付出的人工成本，以及在炉后固化步骤中加热炉体至高温的能量消耗。
该弹性化合物22和密封环24在成型装置中的温度、压力以及固化时间根据弹性化合物22的几何结构和厚度的不同而变化。在一个实施例中，例如当弹性化合物22提供为环形预制件或条状物时，该方法包括将弹性化合物22加热到至少175℃下至少3分钟。该施加到弹性化合物22上的压力和温度将弹性化合物22化学结合至密封环24上，因此无需进行炉后固化步骤。换句话说，该弹性化合物22在成型步骤中在成型装置中完全固化。一旦弹性密封件20从成型装置中移出之后，无需炉后固化步骤。
该化学结合步骤在将弹性化合物22成型到密封环24上时进行，为弹性密封件20提供优良的物理性能，例如与那些通过现有技术包括炉后固化步骤的方法形成的其他弹性密封件可比的物理性能。该弹性化合物22典型地提供粘合失效，这是指在剥离实验中弹性化合物22与密封环24之间的结合在弹性化合物22处失效。因此，弹性化合物22与密封环24之间的结合强于弹性化合物22。
在该成型步骤中，该弹性化合物22可形成为围绕密封环24的多种不同的形状。在图1和图2所示的实施例中，弹性化合物22绕中心轴A周向延伸并覆盖密封环24的内径表面、外径表面以及顶面。该密封环24的顶面由弹性化合物22完全覆盖，而底面未被覆盖且暴露于周围环境中。该弹性密封件20被设计使得在汽车的运行中，沿着内径表面的弹性化合物22与车辆的轴(未示出)配合并保护轴免受油和杂物的污染。
一旦弹性密封件20在成型装置中化学结合至密封环24上，将该弹性密封件20从成型装置中移出。由于在成型步骤中已获得理想的物理性能，因此在成型步骤之后也无需进行炉后固化步骤。因此，在弹性密封件20从成型装置中移出之后，该方法包括将弹性密封件20维持在低于100℃的温度下，优选为低于40℃的温度下，最优选为室温下。
现有技术中弹性密封件的炉后固化典型地包括将弹性密封件放置于炉内，随后将该弹性密封件加热到至少170℃维持1～24小时，或者更长。在现有技术的方法中，该炉后固化步骤在将弹性化合物从成型装置中移出之后进行，并且对于将弹性化合物化学结合至密封环上是必要的。该现有技术中的炉后固化步骤对于弹性化合物的完全固化从而使该弹性化合物获得理想的物理性能也是必要的，例如预定的拉伸强度和弹性模量。如上所述，形成弹性密封件20而无需炉后固化步骤相对于现有技术中包括炉后固化步骤的方法减少了设备和人工成本，以及能量消耗。由于无需炉后固化步骤，该弹性密封件20可在成型和修剪步骤之后立即打包进行运输和销售。无需使用后固化炉，并且无需人力将弹性密封件20移入或移出炉体。
本发明的另一方面还提供了一种根据上述工艺而无需炉后固化步骤形成的弹性密封件20。弹性密封件20成品的弹性化合物22是化学结合到金属密封环24上的，并且包括52.0～68.0wt％的FKM，20.0～35.0wt％的硅酸钙，5.0～15.0wt％的硅藻土，1.0～5.0wt％的炭黑，3.0～5.0wt％的氧化镁，0.5～2.0wt％的氧化钙，0.3～3.0wt％的氢氧化钙，0.5～3.0wt％的双酚AF，0.1～0.5wt％的催化剂，以及0.2～2.0wt％的加工助剂，其中，加工助剂包括蜡，脂肪酸衍生物，有机硅酮，含氟聚醚衍生物，以及十八烷基胺中的至少一种。
该弹性密封件20成品的弹性化合物22还具有足够将该弹性密封件20用作汽车领域的轴密封所需的模量，例如用作密封曲轴或凸轮轴。在一个实施例中，根据ASTMD412测量时，该弹性化合物22具有6.0MPa～13MPa，优选至少7.5MPa的弹性模量。此外，根据ASTMD412测量时，该弹性化合物22的拉伸强度为11.1MPa～14.8MPa。在将弹性密封件20作为典型汽车应用中的轴密封使用时，一部分弹性化合物22被压紧抵靠于轴并防止油和杂物对轴的污染以提高汽车性能。
显然，根据以上教导，本发明的许多修正和变型是可能的，并且在后所附权利要求的范围内，本发明可不同于上述具体描述通过其他方式实施。这些在先的描述应该被理解为覆盖了本发明的新颖性、创造性以及实用性的任意组合。此外，权利要求中的附图标记仅为了示出方便而不应以任意方式解读为限制。

Claims (21)

1.一种用于形成弹性密封件(20)的方法，其特征在于，包括以下步骤：
将弹性化合物(22)成型到密封环(24)上，其中该弹性化合物(22)包括：占所述弹性化合物(22)的重量百分比的，52.0～68.0wt％的含氟弹性体，并且其中密封环(24)包括金属材料；以及
在成型步骤中将该弹性化合物(22)化学结合到密封环(24)上而无需在该成型步骤之后进行炉后固化步骤。
2.根据权利要求1所述的方法，其特征在于，所述弹性化合物(22)具有至少6.0MPa的弹性模量。
3.根据权利要求1所述的方法，其特征在于，所述弹性化合物(22)具有11.1MPa～14.8MPa的拉伸强度。
4.根据权利要求1所述的方法，其特征在于，在成型步骤之前将弹性化合物(22)提供为环形，并且其中该成型步骤包括将弹性化合物(22)加热到至少175℃下至少3分钟。
5.根据权利要求1所述的方法，其特征在于，在成型步骤之前将弹性化合物(22)提供为多个条状物，并且其中该成型步骤包括将弹性化合物(22)加热到至少175℃下至少3分钟。
6.根据权利要求1所述的方法，其特征在于，所述成型步骤包括将弹性化合物(22)和密封环(24)放置于成型装置中，并且还包括在成型步骤之后将弹性化合物(22)从成型装置中移出，以及在成型步骤之后将该弹性化合物(22)维持于低于100℃的温度下的步骤。
7.根据权利要求6所述的方法，其特征在于，所述方法不包括在将弹性密封件(20)从成型装置中移出之后将该弹性化合物(22)加热到至少170℃下至少一小时。
8.根据权利要求1所述的方法，其特征在于，所述炉后固化步骤包括将弹性化合物(22)加热到至少170℃下至少一小时。
9.根据权利要求1所述的方法，其特征在于，包括提供弹性化合物(22)，其中该弹性化合物(22)还包括20.0～35.0wt％的硅酸钙，5.0～15.0wt％的硅藻土，1.0～5.0wt％的炭黑，4.0～10.0wt％的金属氧化物，0.5～3.0wt％的双酚AF，0.1～0.5wt％的催化剂，以及0.2～2.0wt％的加工助剂。
10.一种用于形成弹性密封件(20)的方法，包括以下步骤：
提供一种弹性化合物(22)；
该提供弹性化合物(22)的步骤包括混合各组分，其中该组分包括，占各组分总混合物的重量百分比的，52.0～68.0wt％的FKM，20.0～35.0wt％的硅酸钙，5.0～15.0wt％的硅藻土，1.0～5.0wt％的炭黑，4.0～10.0wt％的金属氧化物，0.5～3.0wt％的双酚AF，0.1～0.5wt％的催化剂，以及0.2～2.0wt％的加工助剂；
提供一密封环(24)，包括绕中心轴(A)周向延伸的多个表面；
清洁该密封环(24)的表面；
将该弹性化合物(22)放置于密封环(24)上；
将该弹性化合物(22)和密封环(24)放置于成型装置中，其中，该成型装置是注塑模具或压塑模具；
在该成型装置中将弹性化合物(22)成型到密封环(24)上；
该成型步骤包括将弹性化合物(22)化学结合到该密封环(24)的至少一个表面上；
该成型步骤包括在该弹性化合物(22)放置于成型装置中时将该弹性化合物(22)加热至175℃并且向该弹性化合物(22)施加压力至少3分钟；
在该成型步骤中将该弹性化合物(22)化学结合到密封环(24)上；
该化学结合步骤包括提供具有根据ASTM412测量下11.1MPa～14.8MPa的拉伸强度的该弹性化合物(22)；
该化学结合步骤包括提供具有根据ASTM412测量下6.0MPa～10.0MPa的弹性模量的该弹性化合物(22)；
在该成型步骤之后将该弹性密封件(20)从成型装置中移出；
在将该弹性密封件(20)从成型装置中移出之后将弹性密封件(20)维持在室温下；以及
在将该弹性密封件(20)从成型装置中移出之后进行该化学结合步骤而无需炉后固化步骤，其中该炉后固化步骤意欲包括将弹性密封件(20)从成型装置中移出之后在炉内将弹性密封件(20)加热到至少170℃的温度下至少一小时。
11.一种弹性密封件(20)，包括：
密封环(24)，包括金属材料并且具有绕一中心轴(A)延伸的多个表面；
化学结合至所述密封环(24)的所述表面中的至少一个上的弹性化合物(22)；
所述弹性化合物(22)包括，占该弹性化合物的重量百分比的，52.0～68.0wt％的FKM；以及
其特征在于，所述弹性密封件(20)通过以下工艺制造，包括以下步骤：将所述弹性化合物(22)成型到所述密封环(24)上；将所述弹性化合物(22)化学结合到所述密封环(24)上；以及该化学结合步骤在成型步骤中进行而无需在成型步骤之后进行炉后固化步骤。
12.根据权利要求11所述的弹性密封件(20)，其特征在于，所述弹性化合物(22)在粘合剥离实验之后发生粘合失效。
13.根据权利要求11所述的弹性密封件(20)，其特征在于，所述弹性化合物(22)具有至少为6.0MPa的弹性模量。
14.根据权利要求11所述的弹性密封件(20)，其特征在于，所述弹性化合物(22)具有至少为6.0MPa的拉伸强度。
15.根据权利要求11所述的弹性密封件(20)，其特征在于，所述成型步骤包括：将所述弹性化合物(22)和所述密封环(24)放置于成型装置中；将所述弹性化合物(22)加热到至少175℃下至少3分钟；并向所述弹性化合物(22)施加压力至少3分钟。
16.根据权利要求15所述的弹性密封件(20)，其特征在于，该形成所述弹性密封件(20)的工艺还包括：在成型步骤之后将所述弹性密封件(20)从该成型装置中移出，并在该成型步骤之后将所述弹性化合物(22)维持在低于100℃的温度下。
17.根据权利要求11所述的弹性密封件(20)，其特征在于，所述炉后固化步骤意欲包括将所述弹性化合物(22)加热到至少170℃的温度下至少一小时。
18.根据权利要求11所述的弹性密封件(20)，其特征在于，所述弹性化合物(22)还包括20.0～35.0wt％的硅酸钙和5.0～15.0wt％的硅藻土。
19.根据权利要求11所述的弹性密封件(20)，其特征在于，所述弹性化合物(22)还包括：20.0～35.0wt％的硅酸钙，5.0～15.0wt％的硅藻土，1.0～5.0wt％的炭黑，4.0～10.0wt％的金属氧化物，0.5～3.0wt％的双酚AF，0.1～0.5wt％的催化剂，以及0.2～2.0wt％的加工助剂。
20.根据权利要求19所述的弹性密封件(20)，其特征在于，所述金属氧化物包括，占所述弹性化合物(22)的重量百分比的，3.0～5.0wt％的氧化镁，0.5～2.0wt％的氧化钙，以及0.3～3.0wt％的氢氧化钙。
21.一种用于接触汽车的金属轴的弹性密封件(20)，包括：
密封环(24)，该密封环具有绕一中心轴(A)周向延伸的顶面和相对的底面；
所述密封环(24)具有面向所述中心轴(A)用于接触该金属轴的内径表面和相对的外径表面；
所述外径表面和所述内径表面绕所述中心轴(A)周向延伸；
所述密封环(24)由金属材料形成；
所述金属材料为钢；
放置并化学结合至所述密封环(24)上的弹性化合物(22)；
所述弹性化合物(22)沿所述密封环(24)的至少一个所述表面延伸；
所述弹性化合物(22)包括，占所述弹性化合物(22)的重量百分百的，52.0～68.0wt％的FKM；20.0～35.0wt％的硅酸钙；5.0～15.0wt％的硅藻土；1.0～5.0wt％的炭黑；4.0～10.0wt％的金属氧化物；所述金属氧化物包括，占所述弹性化合物(22)的重量百分百的，3.0～5.0wt％的氧化镁，0.5～2.0wt％的氧化钙，以及0.3～3.0wt％的氢氧化钙；0.5～3.0wt％的双酚AF；0.1～0.5wt％的催化剂；以及0.2～2.0wt％的加工助剂；所述加工助剂包括：蜡，脂肪酸衍生物，有机硅酮，含氟聚醚衍生物，以及十八烷基胺中的至少一种；
通过不包括炉后固化步骤的工艺制造所述弹性密封件(20)；
该形成所述弹性密封件(20)的工艺包括以下步骤：
提供所述弹性化合物(22)；
提供所述弹性化合物(22)的步骤包括：将各组分混合，其中该组分包括，占所述组分的总混合物的重量百分比的，52.0～68.0wt％的FKM，20.0～35.0wt％的硅酸钙，5.0～15.0wt％的硅藻土，1.0～5.0wt％的炭黑，4.0～10.0wt％的金属氧化物，0.5～3.0wt％的双酚AF，0.1～0.5wt％的催化剂，以及0.2～2.0wt％的加工助剂；
提供所述密封环(24)，包括绕所述中心轴(A)周向延伸的多个表面；
清洁所述密封环(24)的所述表面；
将所述弹性化合物(22)放置于所述密封环(24)上；
将所述弹性化合物(22)和所述密封环(24)放置于成型装置中，其中，该成型装置是注射模具或压塑模具；
在该成型装置中将所述弹性化合物(22)成型到所述密封环(24)上；
该成型步骤包括将所述弹性化合物(22)化学结合至所述密封环(24)的至少一个表面上；
该成型步骤包括当所述弹性化合物(22)被放置于成型装置中时向所述弹性化合物(22)施加压力至少3分钟；
该成型步骤包括当所述弹性化合物(22)被放置于成型装置中时将所述弹性化合物(22)加热至175℃至少3分钟；
在该成型步骤中将所述弹性化合物(22)化学结合至所述密封环(24)；
该化学结合步骤包括：提供具有根据ASTMD412测量时6.0MPa～13.0MPa的弹性模量的该弹性化合物(22)；
该化学结合步骤包括：提供具有11.1MPa～14.8MPa的拉伸强度的该弹性化合物(22)；
在成型步骤之后将所述弹性密封件(20)从成型装置中移出；
在将所述弹性密封件(20)从成型装置中移出之后将所述弹性密封件(20)维持在室温；以及
在将该弹性密封件(20)从成型装置中移出之后进行该化学结合步骤而无需炉后固化步骤，其中该炉后固化步骤意欲包括将弹性密封件(20)从成型装置中移出之后在炉内将弹性密封件(20)加热到至少170℃的温度下至少一小时。
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