CN107708957B - 基板一体型密封垫的制造方法 - Google Patents

基板一体型密封垫的制造方法 Download PDF

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CN107708957B
CN107708957B CN201680027645.1A CN201680027645A CN107708957B CN 107708957 B CN107708957 B CN 107708957B CN 201680027645 A CN201680027645 A CN 201680027645A CN 107708957 B CN107708957 B CN 107708957B
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substrate
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真坂武史
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    • F16J15/00—Sealings
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    • 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
    • B32B2581/00—Seals; Sealing equipment; Gaskets
    • 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
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Abstract

本发明提供基板一体型密封垫的制造方法，无需在模具上设置从型腔延伸的气孔，因此，也无需将形成在气孔内的毛刺切除的后续工序，该制造方法由下述工序构成：按照与想要成型的密封垫的延长形状对应的规定图案，在基板(1)的表面涂覆粘合剂的涂覆工序；以及将基板(1)设置在模具内进行合模，向基板(1)与模具(10)的内面之间所形成的型腔(40)中填充未固化的成型材料并固化的工序，在涂覆工序中，形成沿型腔(40)的延长方向延伸的粘合剂的主涂覆区域(31)、在型腔(40)的外侧能够与模具(10)密接的粘合剂的局部涂覆区域(32)、以及从型腔(40)的外侧位置到达型腔(40)的内侧位置的粘合剂的非涂覆区域(33)。

Description

基板一体型密封垫的制造方法
技术领域
本发明涉及使用模具来制造与基板一体的密封垫的方法。
背景技术
例如，在燃料电池中，作为用于密封燃料气体、氧化气体等的手段，如图6所示设置有基板一体型密封垫，其中，在作为燃料电池单元的构成部件的隔板等基板1上一体粘合由橡胶弹性体(橡胶材料或者具有橡胶态弹性的合成树脂材料)构成的密封垫2。并且，已知有作为这种基板一体型密封垫，密封垫2经由粘合剂层3与基板1一体粘合。
图7表示这种基板一体型密封垫的制造方法的典型现有技术，即，在该制造方法中，首先，将通过涂覆粘合剂在表面形成有粘合剂层3的基板1定位固定在模具101、102之间，向该基板1的表面的粘合剂层3与一个模具101的内面之间所形成的密封垫成型用型腔103内通过LIM(Liquid Injection Molding)等方法射出液态橡胶，通过热反应进行交联固化，在成型密封垫的同时经由粘合剂层3与基板1一体粘合(例如参照下面的专利文献1)
现有技术文献
专利文献
专利文献1：日本特开2008-168448号公报
但是，根据现有的基板一体型密封垫的制造方法，在图7所示的合模时，由于是模具101的型腔103的周围的模压面101a与基板1的表面的粘合剂层3密接的状态，因此，为了防止残留在型腔103内的空气等导致成型不良，需要在模具101上设置从型腔103延伸的所需数量的气孔(未图示)，由此，在完成成型后，需要将流入气孔内的液态橡胶的固化物所形成的毛刺切除的后续工序。
发明内容
本发明鉴于上述问题点而作出，其技术课题在于提供一种基板一体型密封垫的制造方法，无需在模具上设置从型腔延伸的气孔，因此，也无需将形成在气孔内的毛刺切除的后续工序。
本发明为了解决上述技术课题，采用以下手段。
即，本发明所涉及的基板一体型密封垫的制造方法由下述工序构成：按照与想要成型的密封垫的延长形状对应的规定图案，在基板的表面涂覆粘合剂的涂覆工序；以及将所述基板设置在模具内进行合模，向所述基板与所述模具的内面之间所形成的型腔中填充未固化的成型材料并固化，在所述涂覆工序中，形成沿型腔的延长方向延伸的所述粘合剂的主涂覆区域、在所述型腔的外侧能够与所述模具密接的所述粘合剂的局部涂覆区域、以及从所述型腔的外侧位置到达所述型腔的内侧位置的所述粘合剂的非涂覆区域。
根据上述方法，填充到合模所形成的型腔中的成型材料固化从而成型为对应型腔形状的密封垫，并且经由粘合剂层与基板一体粘合。并且，在合模时，在型腔的外侧彼此相对的模具与基板之间，夹有在基板的表面的粘合剂层中的位于型腔外侧形成的局部涂覆区域，而从型腔的外侧位置到达所述型腔的内侧位置的非涂覆区域形成微小间隙，该微小间隙在填充成型材料的过程中可作为型腔内的空气、气体的排出路径。另外，该微小间隙易于通过空气、气体，相反，可以抑制成型材料流出。
根据本发明所涉及的基板一体型密封垫的制造方法，在向型腔填充成型材料的过程中，型腔内残存的空气等通过型腔外侧的粘合剂的非涂覆区域所形成的微小间隙而易于排出，因此，能够防止成型不良，因此，无需在模具上设置气孔，也无需将气孔内产生的毛刺切除的后续工序。
附图说明
图1是表示本发明所涉及的基板一体型密封垫的制造方法的优选实施方式中的合模状态的局部截面立体图。
图2是表示本发明所涉及的基板一体型密封垫的制造方法的优选实施方式中的基板上的粘合剂层与模具的关系的局部俯视图。
图3是表示本发明所涉及的基板一体型密封垫的制造方法的优选实施方式中的合模状态的截面图，图3(A)是沿图2的A-A’线的截面图，图3(B)是沿B-B’线的截面图。
图4是表示本发明所涉及的基板一体型密封垫的制造方法的优选实施方式中的开模状态的局部的截面立体图。
图5是表示本发明所涉及的基板一体型密封垫的制造方法的其他优选实施方式中的基板上的粘合剂层与模具的关系的局部俯视图。
图6是表示基板一体型密封垫的一个例子的局部截面图。
图7是表示现有技术所涉及的基板一体型密封垫的制造方法的局部截面图。
符号说明
1 基板
2 密封垫
10 上模(模具)
12 模压面
20 下模(模具)
30 粘合剂层
31 主涂覆区域
32 局部涂覆区域
33 非涂覆区域
40 型腔
δ 间隙
具体实施方式
下面，参照附图，在适用于制造图4所示的基板一体型密封垫的优选实施方式中对本发明所涉及的基板一体型密封垫的制造方法进行说明。
首先，在图1所示的合模状态下，附图标记10是LIM成型用模具装置的上模，附图标记20是LIM成型用模具装置的下模，附图标记1是一体成型密封垫的基板。
在下模20的上面定位设置基板1，在配置于下模20的上侧的上模10的下面形成有在图示的合模状态下在下模20上的基板1之间用于形成密封垫成型用型腔40的槽状凹部11、在型腔40(槽状凹部11)的周围用于将基板1夹持在下模20之间的模压面12、以及用于将多种液态成型材料混合而成的液态橡胶向型腔40射入的未图示的浇口。
作为型腔40的槽状凹部11按照与想要成型的密封垫(图4所示的密封垫2)的延长形状对应的规定图案沿平面方向以无端状延伸，另外，与想要成型的密封垫(图4所示的密封垫2)的截面形状相对应地由基板1侧的扁平的基座成型部11a以及位于其上侧的密封唇成型部11b构成。
在基板1的表面，按照与想要成型的密封垫(图4所示密封垫2)的延长形状或者称为型腔40的延长形状对应的规定图案，预先形成粘合剂层30。详细而言，在基板1的表面涂覆粘合剂来形成粘合剂层30的工序中，如图2以及图3所示，形成粘合剂的主涂覆区域31、粘合剂的局部涂覆区域32以及非涂覆区域33，其中，粘合剂的主涂覆区域31沿与作为型腔40的槽状凹部11相对的面延伸，粘合剂的局部涂覆区域32从该主涂覆区域31在其延长方向上隔开规定间隔向宽度方向外侧呈带状伸出，在合模时在型腔40的外侧能够与上模10的模压面12密接，非涂覆区域33位于相邻的局部涂覆区域32、32之间。非涂覆区域33以从型腔40的外侧位置到达型腔40内即到达比槽状凹部11的宽度方向的端部11c更靠近内侧的位置的方式延伸。
作为在基板1的表面涂覆粘合剂来形成具有这种区域31～33的呈平面形状的粘合剂层30的方法，可以使用下述方法：在基板1的表面敷设对应非涂覆区域33形状的掩模，在其上面通过喷涂装置涂覆粘合剂；使用具有对应非涂覆区域33形状的掩模的丝网通过丝网印刷进行涂覆；通过预先读入存储的涂覆图案数据来进行无掩模涂覆的喷墨涂覆方法等。
然后，将形成有这种粘合剂层30的基板1按照图示的方式设置在模具装置内进行合模时，如图1以及图3所示，在基板1与上模10的模压面12之间夹有粘合剂的局部涂覆区域32，在非涂覆区域33通过与局部涂覆区域32的微小台阶形成间隙δ。
因此，在将多种液态成型材料混合而成的液态橡胶通过上模10的未图示的浇口向型腔40射入的情况下，在将该液态橡胶填充到型腔40的过程中，能够型腔40内的残存空气、液态橡胶的挥发气体等通过基板1与上模10的模压面12之间的由粘合剂的非涂覆区域33在型腔40的延长方向上以规定间隔形成的间隙δ而压出，并向外部排出。
另外，间隙δ是微小的间隙，因此，空气、挥发气体等易于通过，相反，与空气、挥发气体相比粘性明显较大的液态橡胶则难以通过。并且，能够有效抑制填充到型腔40的液态橡胶从间隙δ流出而形成毛刺。
在完成液态橡胶射入型腔40的填充后，该液态橡胶通过加热等方法交联固化，从而如图4所示，成型具备扁平带状的基座2a以及从其上面隆起为截面呈V字型的山形的密封唇2b的橡胶弹性体(橡胶材料或者具有橡胶态弹性的合成树脂材料)制的密封垫2，并且，该密封垫2的基座2a经由粘合剂层30与基板1一体粘合，因此，通过将上模10与基板1分离进行离模就能够取出在基板1上一体接合有密封垫2的构造的基板一体型密封垫。
并且，根据上述实施方式，在将液态橡胶填充到型腔40的过程中，型腔40内残存的空气、挥发气体等通过粘合剂的非涂覆区域33在基板1与上模10的模压面12之间形成的微小间隙δ而易于排出，因此，能够防止残存气体、挥发气体等导致的成型不良，并且，无需在上模10上另行设置用于从型腔40排出空气、挥发气体的气孔等，因此，不会产生液态橡胶从气孔流出而形成的毛刺，无需毛刺切除工序。
此外，在上述实施方式中，说明了在基板1的表面涂覆粘合剂而形成的粘合剂层30在主涂覆区域31的延长方向上以规定间隔交替具有带状的局部涂覆区域32以及非涂覆区域33的情况，但是，只要通过合模局部涂覆区域32夹于基板1与上模10的模压面12之间、在非涂覆区域33通过与局部涂覆区域32的微小台阶形成间隙δ，则不特别限定局部涂覆区域32与非涂覆区域33的形成图案。
例如，如图5的本发明所涉及的基板一体型密封垫的制造方法的其他实施方式所示，从型腔40的外侧位置向型腔40内侧位置分散设置有呈六角格子状或者正方格子状等的多个局部涂覆区域32，非涂覆区域33在这些局部涂覆区域32之间连续延伸。

Claims (1)

1.一种基板一体型密封垫的制造方法，其特征在于，由下述工序构成：
按照与想要成型的密封垫的延长形状对应的规定图案，在基板的表面涂覆粘合剂的涂覆工序；以及
将所述基板设置在模具内进行合模，向所述基板与所述模具的内面之间所形成的型腔中填充未固化的成型材料并固化而成型所述密封垫的工序，
在所述涂覆工序中，形成沿与所述密封垫的延长形状一致的型腔的延长方向延伸的所述粘合剂的主涂覆区域、在所述型腔的外侧能够与所述模具密接的所述粘合剂的局部涂覆区域、以及从所述型腔的外侧位置到达所述型腔的内侧位置的所述粘合剂的非涂覆区域。
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