CN1118628A - 二次涂层作业线 - Google Patents

二次涂层作业线 Download PDF

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CN1118628A
CN1118628A CN94191340A CN94191340A CN1118628A CN 1118628 A CN1118628 A CN 1118628A CN 94191340 A CN94191340 A CN 94191340A CN 94191340 A CN94191340 A CN 94191340A CN 1118628 A CN1118628 A CN 1118628A
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secondary coating
speed
fibre bundle
optical fiber
extruder
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CN1046806C (zh
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帕沃·维加诺
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Naiksetorom Holding S. A.
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    • B29D11/00—Producing optical elements, e.g. lenses or prisms
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Abstract

一种用来生产二次涂层光纤或光纤束(6)的二次涂层作业线，该作业线包括：一具有馈送辊(1)从而馈送光纤或光纤束(2)的馈送装置；一用来挤压套在光纤或光纤束(2)上的过大二次包敷套管的挤压机(3)；一用来冷却经挤压的二次包敷套管的冷却装置(4)，该挤压机(3)与该冷却装置开始冷却时所在位置之间的距离可调；以及一把二次涂层光纤或光纤束(6)成品卷绕到一接收盘(7)上的卷绕装置(5)。为了即使在作业线速度发生变动时也能保持最终产品的高质量，本发明二次涂层作业线还包括确定冷却装置(4)开始冷却时所在位置的装置(8)，确定二次涂层光纤或光纤束(6)成品的速度的装置(9)以及根据二次涂层光纤或光纤束(6)成品的速度调节冷却装置(4)开始冷却时的位置的装置(11、8)。

Description

二次涂层作业线
本发明涉及生产二次涂层光导纤维或光导纤维束的二次涂层作业线，该作业线包括：一馈送装置，它有一馈送光导纤维或光导纤维束的馈送辊；一挤压机，用来挤压套在光导纤维或纤维束外的过大的二次包敷套管；一冷却装置，用来冷却经挤压的二次包敷套管，该挤压机与冷却装置开始冷却时所在位置之间的距离可调节；以及一卷绕装置，它把经二次涂层的光导纤维或纤维束成品卷绕到一接收盘上。
具有上述基本构造的现有二次涂层作业线是已知的，例如可参见芬兰专利75,939或相应的英国专利申请2,141,557。通常，这类二次涂层作业线虽然受到控制，但在作业线起动和加速时生成的产品并不符合质量要求。原因是作业线速度变动时所生成的二次涂层的特性也变动，二次涂层在达到正常运行速度后才会达到所要求的值。从而大量昂贵的光导纤维被浪费。
另外，光导纤维要在达到生产速度后才穿入二次包敷套管提供的管子中。从而造成塑料的浪费，并且生产速度必须调慢，以便在该慢速下把光导纤维穿入二次包敷套管。
当以比正常运转速度慢的速度把光导纤维穿入二次包敷套管时，产品质量就变差，其主要原因是，冷却装置与挤压机之间的距离不适合于该慢速。实际上，压头的塑料熔料的出口在压头之后形成一锥形部，二次包敷套管在该锥形部中被拉制成最终尺寸。若冷却装置中进行的水冷却开始于该锥形部，所得的管子就呈脆性，即管子在拉伸试验中的拉伸强度很小。另一方面，若压头与水冷却之间距离太长，热塑料的流动会引起形状疵点和直径不均。随着作业线速度的提高，压头后的拉伸锥体变大；只要适当调节作业线速度，就可使二次包敷套管的尺寸符合质量要求。
在二次涂层中，还必须考虑用来生产二次包敷套管的塑料种类。由于不同种类的塑料有不同的特性，因此它们在挤压机中的行为不同并从而塑料熔料的行为也不同，为了使它达到所要求的尺寸，作业线的速度必须合适。
本发明的目的是提供一种新型二次涂层作业线，不管所使用的塑料是什么种类，不管作业线的速度或在生产过程中受控作业线的速度可能发生的变动，它都能获得高质量的二次涂层光导纤维或纤维束。这是用本发明的二次涂层作业线实现的，其特征在于，它包括确定冷却装置开始冷却时所在位置的装置、确定经二次涂层的光导纤维或纤维束成品的速度的装置以及根据这一速度调节冷却装置开始冷却时所在位置的装置。
因此本发明的基本想法是，若冷却开始时的位置根据作业线速度予以调节，则最终产品总能满足质量要求，而与作业线速度无关。最好，调节冷却装置开始冷却时所在位置的装置包括第一存储装置，用来存储产品特有二次包敷套管关于在经二次涂层的光纤或光纤束成品的各种速度下冷却装置开始冷却操作时应取位置的数据。根据试运行所获得的信息，就可确定获得具有所要求特性的产品的条件，这些条件取决于所使用的塑料种类和最终产品的应有尺寸。因此，根据产品说明书，就可在已知作业线速度时确定冷却开始时的位置。
为了控制影响产品质量的所有可能因素；本发明二次涂层作业线还有利地包括：第二存储装置，用来存储产品特有的二次包敷套筒的关于挤压机在挤压机的挤压螺杆的不同转速下的流量的数据。以及调节挤压机挤压螺杆转速以便在经二次涂层的光导纤维或纤维束成品的各种速度下产生所需流量的装置。这就可以计及挤压机运行的任何非线性并消除其影响。
按照上述内容，本发明二次涂层作业线可提高或降低作业线速度而不损害产品质量。为最佳使用这一特征，本作业线还包括确定经二次涂层的光纤或光纤束成品卷绕在接收盘上的长度的装置以及卷完所需长度时把次涂层光纤或光纤束成品的速度降低到接收盘更换速度并且在更换完接收盘后加速到正常速度的装置。
下面结合附图详述本发明二次涂层作业线，该附图简示出本发明二次涂层作业线。
该图示出本发明二次涂层作业线，但为了简明起见，图中只示出二次涂层作业线中的重要操作部件，为简明起见，未示出二次涂层作业线中下述普遍部件，诸如把所需拉力加到二次包敷套管上的拉伸装置、与挤压机相连而把油脂通过挤压机送入二次包敷套管中使油脂充满二次包敷套管的装置或种种测量装置，例如测量产品直径的装置。这类普通组件已公开在比方说上述芬兰专利75,939和相应的英国专利申请2,141,557中。
附图所示本发明二次涂层作业线基本上包括一具有一馈送辊1用来馈送光纤或光纤束2的馈送装置、一挤压光纤或光纤束2上的过大二次涂层的挤压机3、一冷却经挤压二次包敷套管的冷却装置4以及一把经二次涂层光纤或光纤束成品6卷绕到一接收盘7上的卷绕装置5。如图所示，本发明二次涂层作业线还包括一控制计算机10，它包括执行不同任务的各存储区和处理器。控制计算机10包括一存储区11，冷却装置4在各种作业线速度下开始冷却的位置即存储其中。控制计算机10的一程序块15取得表示作业线速度的数据，作业线速度比方说可以与卷绕装置5连接的一轮9取得。当然也可使用任何现有的测量作业线速度的装置。根据测得的作业线速度以及存储区15中的“工作程序特有的”数据，控制计算机10的启动器8控制与冷却装置4相连并且具有比方说套筒式结构的冷却流料槽17，从而使冷却流料槽17与挤压机3之间的距离符合要求。这样就可保持二次包敷套管的冷却条件不变，而与经挤压的二次包敷套管的拉伸锥部的长度无关，而该长度转而又决定于最终产品的所需尺寸、二次包敷套管的材料以及作业线速度。
为了控制冷却流料槽的包敷套筒部17的位置，控制计算机10自然还需要关于包敷套筒部当前位置、也即冷却开始的位置的信息。控制计算机10使用与启动器8相连的普通传感器取得这一信息，根据冷却开始的位置以及作业线速度，并使用存储在存储区11中有关二次包敷套管的冷却装置在各种作业速度下须开始冷却操作的产品特有位置的数据，控制计算机10即能向启动器8发出一信号而使包敷套筒部17按要求方向移动。由于启动器8不断进行传感操作，因此控制计算机不断获取有关包敷套筒部位置的信息，因此控制计算机能不断根据作业线速度修正包敷套筒部的位置。由于修正进行得极其迅速，因此可以低速起动作业线并且即使在此低速下也能满足给产品设定的质量要求，并进一步加速作业线直到它达到所需速度而不损害产品质量。
在本发明次涂层作业线中，还可考虑到挤压机的运行可以是非线性的。因此，控制计算机10包括第二存储区或存储装置12，用来存储产品特有的二次涂层的关于挤压机在挤压机挤压螺杆的不同转速下的流量的数据。为了使挤压机3的流量与变动的作业线速度相符，控制计算机10包括合适的软件，它在收到关于作业线速度的数据后，向调节挤压机挤压螺杆转速的启动器13发出一控制信号，从而按产品要求把该挤压螺杆的转速设定成符合不同作业线速度的所需值。对挤压机可能发生非线性的这一矫正还提高了作业线特别是在其速度变动范围很大时的运行性。
本发明二次涂层作业线的特征—即作业线能与作业线速度无关地生产满足质量要求的最终产品—还有利于连续操作：与现有双卷绕机不同，本发明作业线可使用便宜得多的单卷绕机，因为无需停下作业线就能更换接收盘。因此，上述作业线的卷绕装置5有一启动器14，它一般为独立生产线启动器，用来测量卷绕在接收盘7上的二次涂作业线的最终产品的长度。表示该卷绕长度的数据送往控制计算机的程序块16，使用该程序块中的一程序并使用计算机10的其它存储区和处理器便可在绕完所要求长度后把二次涂层作业线的速度降到接收盘更换速度并在更换完接受盘后加速回正常速度。按照本发明，当卷绕在接收盘上的产品长度达到该定值时，计算机10的程序块16需要时可把作业线速度降到在即使没有收集器的单个卷绕机中也能更换接收盘7的速度。当更换完接收盘后，程序块16又通过控制而把作业线速度加速回正常速度；因此既不中断生产过程，又不因更换接收盘或改变速度而丝毫损害产品质量。
上面用一示例性例子说明了本发明二次涂层作业线，但应指出，只要不背离后附权利要求的范围，可按需要进行各种改动和增添其它部件。

Claims (4)

1.一种用来生产二次涂层光纤或光纤束(6)的二次涂层作业线，该作业线包括：
一具有馈送辊(1)从而馈送光纤或光纤束(2)的馈送装置；
一挤压机3，用来挤压套在光纤或光纤束(2)上的一过大二次包敷套管；
一冷却装置(4)，用来冷却经挤压的二次包敷套管，挤压机(3)与该冷却装置开始冷却时的所在位置之间的距离可调；以及
一卷绕装置(5)，把经二次涂层的光纤或光纤束(6)成品卷绕到一接收盘(7)上，其特征在于，还包括：
确定冷却装置(4)开始冷却时的位置的装置(8)；
确定经二次涂层的光纤或光纤束(6)成品的速度的装置(9)；以及
按照经二次涂层光纤或光纤束(6)的成品的速度调节冷却装置(4)开始冷却位置的装置(11、8)。
2.按权利要求1所述的二次涂层作业线，其特征在于，调节冷却装置开始冷却位置的装置包括：
第一存储装置(11)，用来存储产品特有的二次包敷套管关于冷却装置(4)在经二次涂层的光纤或光纤束(6)成品的不同速度下开始冷却操作所应取位置的数据。
3.按权利要求1或2所述的二次涂层作业线，其特征在于，还包括：
第二存储装置(12)，存储产品特有的二次包敷套管关于挤压机(3)在挤压机挤压螺杆的不同转速下的流量的数据；以及
调节挤压机挤压螺杆的转速从而按照经二次涂层的光纤或光纤束(6)成品的不同转速产生应有流量的装置(12、13)。
4.按权利要求1至3中任一项所述的二次涂层作业线，其特征在于，还包括：
确定卷绕在一接收盘上的经二次涂层的光纤或光纤束(6)的成品的长度的装置(14)；以及
当绕完预定长度后把经二次涂层的光纤或光纤束(6)成品的速度降低到接收盘更换速度并在更换完接收盘后把该速度加速回正常速度的装置(16、9)。
CN94191340A 1993-12-31 1994-12-30 二次涂层作业线 Expired - Fee Related CN1046806C (zh)

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JPH08507621A (ja) 1996-08-13
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DE69413522D1 (de) 1998-10-29
ATE171548T1 (de) 1998-10-15
AU1319195A (en) 1995-07-17
BR9406425A (pt) 1996-01-09
FI935955A0 (fi) 1993-12-31
EP0687365B1 (en) 1998-09-23
DE69413522T2 (de) 1999-04-22
FI94989C (fi) 1995-11-27
KR100342463B1 (ko) 2002-11-08
ES2122524T3 (es) 1998-12-16

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