CN101143352A - 热空气喷嘴 - Google Patents

热空气喷嘴 Download PDF

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CN101143352A
CN101143352A CNA200710149381XA CN200710149381A CN101143352A CN 101143352 A CN101143352 A CN 101143352A CN A200710149381X A CNA200710149381X A CN A200710149381XA CN 200710149381 A CN200710149381 A CN 200710149381A CN 101143352 A CN101143352 A CN 101143352A
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L·吉斯勒
A·尼德伯格
M·卢斯滕伯格
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Leister Process Technologies
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Abstract

用于对于搭接设置的扁平的密封轨道、特别是沥青－密封轨道进行焊接的热空气焊接装置(1)的热空气焊接喷嘴(5)，具有一热空气接头(7)、构成一空气室(11)的一上热板和一下热板(9、10)、至少一个在上热板和下热板(9、10)之间对着热空气焊接装置(1)的运动方向的端面的反向出口孔(12)，其中，沿着热空气焊接装置(1)的运动方向设置至少一个前向出口孔(13)，并且至少在远离热空气接头(7)的内侧设置了在端侧伸出热板(9、10)的空气引导装置(14)。利用根据本发明所构成的热空气焊接喷嘴或者相应地构成的热空气焊接装置可以使密封轨道、特别是沥青－密封轨道通过较长的预加热区基本上快速地进行焊接。

Description

热空气喷嘴
技术领域
本发明涉及一种用于对于搭接设置的扁平的密封轨道、特别是沥青-密封轨道进行焊接的热空气焊接装置的热空气焊接喷嘴，该热空气焊接喷嘴具有一热空气接头、构成一空气室的一上热板和下热板、至少一个在所述上热板和下热板之间对着热空气焊接装置的运动方向的端面的反向出口孔。
背景技术
为热空气焊接装置公开了一些这种类型的热空气喷嘴。这些焊接装置在一可移动的底架上具有一可绕一水平轴摆动的热空气装置，这样，在焊接过程时设置在热空气装置的一端部的热空气焊接喷嘴侧边地移动到平面搭接设置的密封轨道之间。当热空气焊接装置沿着密封轨道的边缘运动时在上侧面的下密封轨道和在下侧面的上密封轨道被通过在喷嘴的上侧面和下侧面出来的热空气加热。然后在热空气焊接装置的压紧辊滚压密封轨道之前通过在喷嘴的反向出口孔放出的热空气进行强烈的加热。为了保证通过热空气焊接喷嘴对密封轨道进行良好的导向，已公开的热空气焊接喷嘴具有一其截面为如此的楔形的形状、即比较的端部位于远离热空气接头的那一侧。此外，加热板的上侧面和下侧面上的出口孔设置在面对着反向出口孔的那个端部，为的是在此对密封轨道进行预热。然而实践表明使用如此设计的热空气焊接喷嘴不能以令人满意的速度完成焊接过程。
发明内容
因此本发明的任务是建议一种可行方案，采用这种方案可以以更快的速度对密封轨道、特别是沥青-密封轨道进行焊接。
根据本发明这个任务是通过一种具有独立权利要求特征的热空气焊接喷嘴以及一种具有这样的热空气焊接喷嘴的热空气焊接装置来完成的。由从属权利要求中可得到其它有利的方案。
根据本发明，所述热空气焊接喷嘴具有至少一个沿热空气焊接装置运动方向的前向出口孔。通过这一措施实现大大地扩大整个有效的加热区域，在该加热区域中对密封轨道进行预加热，并且紧接着为焊接过程将其塑化。密封轨道已经被预热地到达热板。在该热板上优选地出口孔均匀地分布在整个平面上，然后在热板之后到达反向出口孔之前，在这里密封轨道已为紧接着的焊接过程被足够地塑化。无论是反向出口孔还是前向出口孔都可以设计为缝形的一孔，或者有中断地设计成多个孔。这些孔以已公开的方式在喷嘴的整个宽度上延伸。此外，为了阻止从反向和前向出口孔出来的热空气不在密封轨道之间到达下面的薄膜的边缘，并且在那里破坏设置在它下面的绝缘层，还在热空气焊接喷嘴上至少在远离热空气接头的内侧设置在端部超出热板的空气引导装置。这些空气引导装置阻止热空气运动到不希望的区域中，并且负责将热空气恰好保留在对于焊接来说重要的区域中。
根据本发明的另一方案上热板和下热板基本彼此平行设置。这样，无论是在反向出口孔还是在前向出口孔优选地在热空气焊接喷嘴的整个宽度产生一均匀的空气出口区域，通过这一措施达到比已公开的三角形的出口孔更加均匀的空气分布。此外，这些热板具有空气出口孔，这些空气出口孔优选地均匀分布，并且通过这一措施在上热板和上密封轨道之间产生热气垫。上密封轨道因此部分地接触上热板，并且另一方面从空气出口喷嘴出来的热空气起作用。除了热板的热表面以外出来的热空气也对密封轨道起加热作用。
有利地空气引导装置设计成侧边设置的导向板。该导向板朝自由端方向缩小。除了设置的空气引导装置以外通过这种设计还达到密封轨道，特别是厚的沥青-密封轨道无弯折连续地抬起到热板区域中的喷嘴的最大厚度。这样就保证上密封轨道的下侧面和上热板的上表面的良好接近。
根据本发明的另一特别的设计在前向出口孔区域中设置一当喷嘴位于热空气焊接装置中的静止位置时可摆动到从这个喷嘴中出来的热气流中的空气制动器。通常在静止位置时设置在热空气焊接装置上的热空气装置绕一水平轴摆动，这样，热空气焊接喷嘴离密封轨道尽可能地远，以使密封轨道非无意地被加热。为了防止从前向出口孔出来的热空气，特别是密封轨道也加热热空气焊接装置的另一些部件，设置了这个可摆动的空气制动器。有利地如此地设计这个空气制动器，即从前向出口孔出来的热空气基本又朝热板方向偏转。这合适地通过一种由两个纵向壁形成的槽式的空气偏转装置实现。
为了使这个空气制动器可靠地发挥作用，并且在静止位置时一在此位置时热空气装置仍在运行一刹住或者偏转出来的热气流，该空气制动器通过一杠杆臂可摆动地用一挡块支承，这样该空气偏转装置通过重力进入到所希望的位置。优选地该空气制动器具有一工作轮，当将喷嘴放置到密封轨道之一上时它使空气偏转装置从热气流中摆出，沿着密封轨道在其上运行，并且使空气偏转装置脱离热气流。
使用根据本发明设计的热空气焊接喷嘴或者相应设计的热空气焊接装置，现在通过较长的预热区域可快得多地焊接密封轨道、特别是沥青-密封轨道。
附图说明
从下述对一种实施例的说明、并联系权利要求和附图得到本发明的其它特征和优点。这些单个的特征可单独地或者多个地在本发明的实施方式中实现。这些附图是：
图1：具有一热空气装置、且位于工作位置中的热空气自动焊接机；
图2：处于静止位置中的、且热空气装置向上翻起的按照图1的热空气自动焊接机；
图3：处于工作位置的热空气焊接喷嘴的不同平面图，其中，图3a为透视图，图3c为空气制动器的支承装置的侧面图，图3b为空气引导装置的侧面图，图3d为后视图，图3e为俯视图，图3f为沿A-A线的空气室和空气偏转装置的截面图；
图4：处于静止位置中的热空气焊接喷嘴的不同平面图，其中图4a为透视图，图4b为空气引导装置的侧面图，图4c为空气制动器的支承装置的侧面图，图4d为后视图，图4e为俯视图，图4f为沿线B-B的空气室和空气偏转装置的截面图。
具体实施方式
图1示出一热空气自动焊接机1。该焊接机在它的底座4上具有一通过一水平轴3可摆动支承的热空气装置2。在此图中该热空气装置处于工作位置中，这样，设置在端部处的热空气焊接喷嘴5以已公开的方式在两个未示出的密封轨道之间基本上与压紧辊6对齐地设置。这个喷嘴以已公开的方式用热空气焊接喷嘴5的下侧面贴靠在未示出的下密封轨道的上侧面上，而上密封轨道通过热空气焊接喷嘴5的上侧面被导向。
图2示出具有位于静止位置中的热空气装置的热空气自动焊接机1。在这个静止位置中通过热空气装置2围绕转动轴3的转动使热空气焊接喷嘴5离开密封轨道，并且从压紧辊6的区域中摆动出来。这种方式方法在这种类型的热空气自动焊接机中已普遍公开与常用。
图3和图4以不同的平面图(图3a-3f，和图4a-4f)表示相当于工作位置(图3)和静止位置(图4)中的图1和图2中的热空气焊接喷嘴5。图3a和4a的透视图表示热空气焊接喷嘴5的热空气输入装置7，以及与之相连接的、且具有均匀分布的空气出口孔15的上热板9。相应的空气出口孔15位于下热板10上。上热板9和下热板10形成一空气室11(图3f)，该空气室具有端面的反向出口孔12和前向出口孔13。在侧面分别设置一引导板形状的空气引导装置14。这些空气引导装置使得由上热板9和下热板10形成的(预热)加热区8在端面伸出出口孔12、13，并且负责使从出口孔12、13出来的热空气不能到达空气引导装置14的另一侧。这些引导装置14在它们的上侧的端部处有倾斜，这样直到加热区8的高度出现一连续的过渡部分(图3b)。
在热空气焊接喷嘴5上设置一空气制动器16。它通过一水平的轴20铰接，并且具有一杠杆臂19。该杠杆臂支承一空气偏转装置17和一工作轮18。如从图3b和3c可以看出，空气偏转装置17位于杠杆臂19的拐角区域中，并且在工作位置时离开前向出口孔13。工作轮18位于空气引导装置14的高度上，并且因此在未示出的下密封轨道上滚动。从截面图3d和截面图3f可看到空气偏转装置17相对于前向出口孔13的立体位置图。空气偏转装置17主要由一锥形的、纵长的、其端面封闭的、且具有在本实施例中彼此垂直设置的纵向壁21的槽构成。从图3a、3d和3c中可以看出，热板9和10彼此平行设置。
图4示出同图3一样的平面图，其中，热空气焊接喷嘴5和热空气装置4位于图2中所示的静止位置中。在这个位置中，空气制动器16通过重力、并且受到挡块22(图4c)的限制地向下偏转，这样，空气偏转装置17正好到达前向出口孔13的前方，并且将出来的空气沿着热板和上下热板9、10的方向导回(图4f)。
使用根据本发明设计的喷嘴可如上所述地以更快的焊接速度来焊接沥青-密封轨道、还有其它的密封轨道。

Claims (10)

1.用于对于搭接设置的扁平的密封轨道、特别是沥青-密封轨道进行焊接的热空气焊接装置(1)的热空气焊接喷嘴(5)，具有一热空气接头(7)、构成一空气室(11)的一上热板和一下热板(9、10)、至少一个在上热板和下热板(9、10)之间对着热空气焊接装置(1)的运动方向的端面的反向出口孔(12)，其特征在于，沿着热空气焊接装置(1)的运动方向设置至少一个前向出口孔(13)，并且至少在远离热空气接头(7)的内侧设置了在端侧伸出热板(9、10)的空气引导装置(14)。
2.按照权利要求1所述的热空气焊接喷嘴，其特征在于，所述至少一个前向出口孔(13)具有一空气出口区域，该空气出口区域是在通过上热板和下热板(9、10)形成的热区(8)的整个宽度上产生的。
3.按照权利要求1或2所述的热空气焊接喷嘴，其特征在于，所述上热板和下热板(9、10)基本彼此平行地设置。
4.按照前述权利要求中任一项所述热空气焊接喷嘴，其特征在于，所述上热板和下热板(9、10)具有优选地均匀分布的空气出口孔(15)。
5.按照前述权利要求中任一项所述的热空气焊接喷嘴，其特征在于，空气引导装置(14)构成为侧边设置的导向板，它们朝自由端方向缩小。
6.按照前述权利要求中任一项所述的热空气焊接喷嘴，其特征在于，在前向出口孔(13)的区域中设置一空气制动器(16)，该空气制动器当热空气焊接喷嘴(5)在热空气焊接装置(1)中的静止位置中时在从这个喷嘴中出来的热气流中可进行摆动。
7.按照权利要求6所述的热空气焊接喷嘴，其特征在于，空气制动器(16)将从前向出口孔(13)出来的热空气基本又向上热板和下热板(9、10)的方向进行偏转。
8.按照权利要求7所述的热空气焊接喷嘴，其特征在于，空气制动器(16)具有一由两个纵向壁(21)形成的、槽式的空气偏转装置(17)。
9.按照前述权利要求6至8中任一项所述的热空气焊接喷嘴，其特征在于，空气制动器(16)具有一工作轮(18)，当热空气焊接喷嘴(5)放置到所述密封轨道之一上时该工作轮使空气偏转装置(17)从热空气流中摆动出来，并且一起在密封轨道上滚动，并且使空气偏转装置(17)脱离热空气流。
10.用于对于搭接设置的扁平的密封轨道、特别是沥青-密封轨道进行焊接的热空气焊接装置(1)，其特征在于具有按照前述权利要求1至9中任一项所述特征的热空气焊接喷嘴(5)。
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