CN106536162B - 用于识别管道波纹器中的热膨胀的装置和方法 - Google Patents
用于识别管道波纹器中的热膨胀的装置和方法 Download PDFInfo
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Abstract
一种管道波纹器,具有形成移动模具通道的相对系列的被推动的模具块,该管道波纹器具有显著的热膨胀性,并设计有热膨胀间隙。本发明提供了一种用于测量该膨胀间隙的变化并且优选地在严重问题发生之前识别潜在热学问题的方法和装置。传感器设置成邻近模具块驱动部,该传感器优选地检测在领先模具块的后部和以热膨胀间隙与领先模具块分离的跟随模具块的前缘之间的持续时间。该持续时间与被推动的模具块的速度相组合,用于计算热膨胀间隙的尺寸。
Description
技术领域
本申请涉及一种具有形成模具通道的一系列移动模具块的成形设备。
背景技术
具有用于形成移动模具通道的第一和第二相对系列模具块的成形设备是众所周知的,并且与用于形成包括管道和波纹塑料管的细长塑料制品的塑料挤出机相关联地使用。第一系列模具块与相对的第二系列模具块协作以形成移动模具通道。模具块在模具块的入口和出口之间有效地循环,其中在该入口处模具块接合以形成模具通道,在该出口处模具块分开并且再循环到入口。第一和第二系列模具块通常作为并排模具块或作为上下模具块循环。
这种类型的成形装置可用于挤压管和其它细长结构,并且特别适用于挤压波纹管和具有固定在其上的内平滑壁和外波纹壁的双壁波纹管。可以使用且已知了其它横截面形状。
对小直径和大直径波纹管的需求继续增加,并且制造速度也增加。波纹器现在可以以超过每分钟50米的速度操作。这种速度的增加通常需要更长的模具通道和相应地增加模具块的数量。
通常在管道波纹器中,移动模块的一端由驱动装置推动而沿导轨移动,并且该驱动装置继续将模具块推回到该驱动装置。在驱动装置的返回路径上,在与驱动装置恰好接合的领先模具块与被推动至驱动装置的跟随模具块之间限定了热膨胀间隙。该热膨胀间隙分离模具块,并使模具块由于模具块的操作温度而引起热膨胀。热膨胀的量也是与每个系列模具块相关联的一个或多个冷却装置的冷却效率的函数。
将针对第一系列模具块和相关联的下部第二系列模具块(竖直布局)描述本发明,然而可以理解的是,这种类型的设备可以是水平或其他带有角度布置的相对系列模具块。
发明内容
根据本发明的管道波纹器具有被推动的第一系列模具块,该第一系列模具块与相对的、被推动的第二系列模具块合作并且抵接,从而在第一系列模具块和第二系列模具块的抵接模具块之间限定波纹模具通道。第一系列模具块和第二系列模具块在模具通道的出口处相互分离,并且沿着返回路径被推动,从而与邻近模具通道的入口的相对的模具块抵接。每一个系列的模具块包括可变速的模具块驱动部,该可变速的模具块驱动部与被推动至模具块驱动部的领先模具块接合并且使领先模具块与相邻的跟随返回模具块分离,以在所述领先模具块和跟随模具块之间产生热膨胀间隙。每一个系列的模具块包括:处理装置,该处理装置包含传感器,该传感器检测与可变速的模具块驱动部接合的领先模具块相对于将要与可变速的模具块驱动部接合并且以热膨胀间隙与领先模具块分离的跟随模具块的移动。提供用于检测被推动的模具块的速度的装置,并且基于检测速度评估热膨胀间隙的尺寸。
在本发明的一个方面,用于检测模具块的移动的传感器是边缘检测装置,其提供与边缘传感器检测跟随模具块的前缘所需的时间相对应的信息。
在本发明的一个优选的方面,提供了处理器,其使用时间信息和检测的速度以输出热膨胀间隙的距离计算结果。
根据本发明的一个方面,如果测量的热膨胀间隙小于预定最小值,处理器产生操作报警指示。另外,如果测量的热膨胀间隙超过预定最大值,处理器优选地产生操作报警指示。
在本发明的进一步方面,提供了用于模具块的可变冷却装置的控制器,并且如果测量的热膨胀间隙小于预定最小值,控制器从处理器接收信号以增加可变冷却装置。
在本发明的一个方面,提供了用于管道波纹器的自动长度调节装置的控制器。如果测量的热膨胀间隙小于预定最小值,控制器接收来自处理器的信号以增加管道波纹器的长度。
根据本发明的一个方面,提供了用于调节管道波纹器的长度的自动长度调节装置和控制器,并且控制器将热膨胀间隙保持在指定范围内。
在本发明的一个方面,控制器与处理器进行通信,并且如果测量的热膨胀间隙大于预定最大值,处理器产生信号并且将该信号传送至控制器以减少管道波纹器的长度。
本发明还包括一种用在管道波纹器中的方法,该管道波纹器具有抵接的循环模具块,循环模具块通过驱动装置沿着驱动路径被推动并且返回到驱动装置,以限定位于驱动装置的两个相邻模具块之间的热膨胀间隙。两个相邻模具块中的领先模具块与驱动装置接合,跟随模具块以热膨胀间隙与领先模具块分离。该方法包括:检测模具块沿着驱动路径被推动时的速度;检测跟随模具块移动通过热膨胀间隙并与驱动装置接合的持续时间;并且基于检测的速度和检测的持续时间确定热膨胀间隙的尺寸;并且提供确定的热膨胀间隙的尺寸的至少一个操作者指示显示。
在本发明的一个方面,该方法包括:如果确定的热膨胀间隙的尺寸小于预定最小值,提供报警信号。
优选地,如果确定的热膨胀间隙的尺寸大于预定最大值,也提供报警信号。
在本发明的又一方面中,管道波纹器包括用于从模具块移除热量的可变冷却装置,并且该方法进一步包括:如果确定的热膨胀间隙的尺寸低于预定最小值,根据确定的热膨胀间隙的尺寸改变可变冷却装置,以从模具块移除热量。
在本发明的一个方面,管道波纹器包括用于增加或减少波纹器的长度从而改变热膨胀间隙的可变调节装置。该方法进一步包括:如果确定的热膨胀间隙的尺寸低于预定最小值,根据确定的热膨胀间隙的尺寸自动改变可变调节装置,以增加管道波纹器的长度。优选地,该方法还包括:如果确定的热膨胀间隙的尺寸超过预定最大值,根据确定的热膨胀间隙的尺寸自动改变可变调节装置,以减少管道波纹器的长度。
附图说明
附图中示出本发明的优选实施例,其中:
图1是形成移动模具通道的第一系列模具块和相关的相对的第二系列模具块的竖直视图;以及
图2是模具块和作为成形装置的操作参数的一部分进行测量的热膨胀间隙的局部立体图。
具体实施方式
管道波纹器成形装置2包括由驱动装置20独立驱动的第一系列循环模具块4。还具有位于第一系列下方的第二系列循环模具块6,其与第一系列合作并形成具有入口10和出口12的移动模具通道8。移动模具通道8由第一和第二系列的抵接模具块形成,并且抵接的模具块与挤出产品一起移动,直到其充分冷却。模具块在模具通道的出口12处分开,并且在该点处塑料已经充分冷却以保持模制形状。显示了细长挤压产品16,并且通常细长挤压产品16是管、波纹管或各种特殊波纹型产品。
相对于第一系列模块4的驱动装置20推动模具块通过模具通道以与产品一起前进并继续将模具块推回驱动装置20。惰轮22沿通道7与模具块接合并使模具块返回到驱动装置20。
领先模具块40已经与驱动装置20接合并且与被推动的跟随模具块42前进和分离。如图1所示,领先模具块40和跟随模具块42之间存在热膨胀间隙30。第二系列模具块中存在类似的装置。
模具块边缘传感器50用于提供关于热膨胀间隙的尺寸的信息。模具块边缘传感器50检测领先模具块的后缘,并随后检测跟随模具块的前缘。这些检测之间的持续时间与驱动装置或被推动的模具块的检测速度相组合,允许评估或计算热膨胀间隙30的尺寸。
热膨胀间隙30将根据波纹器的操作温度,特别是根据模具块的操作温度而改变。这些模具块经过热膨胀,并且需要膨胀间隙以提供安全缓冲。随着波纹器的尺寸(长度)和模具块的数量增加,热膨胀间隙可以快速关闭。发明人已经认识到,需要检测或监测热膨胀间隙并且确认模具块的热膨胀尚未消除该缓冲区域。消除此缓冲区域将束缚或者锁定波纹器。这种情况可能导致设备的本质损坏,生产时间损失,产品损失或报废以及可能的人员危险。
这些波纹器包括用于调节波纹器的长度的各种装置,并且以这种方式,操作者可以在最初将热膨胀间隙设置为期望值,并且如果成形装置达到操作温度,则必要时可以调节波纹器的长度。以附图标记26示出一个这样的调节机构,其中波纹器的长度通过调节惰轮22的位置来调节。其他调节机构是公知的并且可以使用。
这些成形装置还包括一个或多个冷却装置,其使冷却流体循环通过模具块,优选地,使冷却空气循环通过模具块。通常使用与模具块的返回路径相关的补充冷却。如果为了降低模具块的操作温度和降低模具块的热膨胀(这减少了热膨胀间隙的尺寸)而使热膨胀间隙变得太小,则也可以调节对模具块的冷却。
对于较小的波纹器,膨胀间隙和间隙中的动态变化较不明显。通常可以设置间隙,并且在操作期间不需要进行频繁调节。对于较大的波纹器和较高速度的波纹器则不存在这样的情况。
虽然模具块边缘传感器50检测第一模具块的后缘和跟随模具块的前缘,但也期望接收模具块的速度以确定热膨胀间隙的实际尺寸。已知各种不同装置可用于跟踪动力驱动装置的速度以及模具块在前进时的速度。可以使用用于确定模具块在被推动通过移动模具通道时的速度的其他装置。
图2示出了一些附加细节,其中领先模具块40已经与动力驱动装置20接合并且与跟随模具块42分离。这样产生了热膨胀间隙,其以附图标记30示出。达到动力驱动装置20下侧的模具块均被推动以形成模具通道,类似地,与跟随模具块42接触的模具块也通过驱动装置20抵接并被推动。图2示出了控制单元60,其经由模具块边缘传感器50接收关于动力驱动装置20的速度以及模具块的检测边缘的信号。模具块的速度与模具块的检测边缘之间的时间相组合,确定热膨胀间隙30的实际尺寸。该间隙由操作者监测并且可以通过改变波纹器的长度以确保存在最小热膨胀间隙和/或通过调节模具块的冷却来调节该间隙。
对于较高速度的成形装置,模具块边缘传感器50检测到领先模具块的后缘和跟随模具块的前缘之间的持续时间可能非常短。这样可能导致检测热膨胀间隙发生显著变化。为了克服这种可能的测量误差,在模具块基部80处改变模具块,以在模具块的后缘上包括检测凹部82。利用该布置,模具块边缘传感器50将首先检测领先模具块的模具块边缘84和跟随模具块42的前缘86。检测凹部82为检测模具块边缘84和前缘86之间提供更多的时间。凹部82的长度是已知的,因此控制单元60可以准确地评估热膨胀间隙30。
已经针对多个系列模具块中的热膨胀间隙描述了本系统,并且通常将向操作者提供信号或数字,使得操作者知道该间隙。还可以使用该信号来自动调节成形装置的长度以保持期望的热膨胀间隙。该信号与波纹器的变长或变短组合,可用于保持期望的操作参数。也可以在该装置检测到热膨胀间隙减少时增加模具块冷却功能,从而降低模具块的热度,因此使热膨胀间隙返回到更加可以接受的水平。
虽然热膨胀间隙的检测可以用于波纹器的自动调节,但是也可以使用该信号来产生指示热膨胀间隙变得太小和/或可能变得太大的一个或多个报警指示。
对于挤出产品,模具块需要随着该产品挤出而继续移动。模具块使产品成形并降低挤出材料的温度,以在模具块分离之前设置塑料。
可以理解的是,可以使用该系统的许多不同的变型,所有这些变型均利用热膨胀间隙的检测及其使用时的优势,以确保成形装置以期望的方式操作,并且在期望的操作配置中。
尽管在此已经详细描述了本发明的各种优选实施例,但是本领域技术人员应当理解,在不脱离所要求保护的本发明的情况下,可以对其进行变化。
Claims (15)
1.一种管道波纹器,具有被推动的第一系列模具块,所述第一系列模具块与相对的、被推动的第二系列模具块合作并且抵接,从而在所述第一系列模具块和所述第二系列模具块的抵接模具块之间限定波纹模具通道;其特征在于,
所述第一系列模具块和所述第二系列模具块在所述模具通道的出口处相互分离,并且沿着返回路径被推动,从而与邻近所述模具通道的入口的相对的模具块抵接;
每一个系列的模具块包括可变速的模具块驱动部,所述可变速的模具块驱动部与被推动至所述模具块驱动部的领先模具块接合,并且使所述领先模具块与相邻的跟随返回模具块分离,以在所述领先模具块和所述跟随模具块之间产生热膨胀间隙;并且
每一个系列的模具块包括:处理装置,所述处理装置包含传感器,所述传感器用于检测与所述可变速的模具块驱动部接合的领先模具块相对于将要与所述可变速的模具块驱动部接合并且以所述热膨胀间隙与所述领先模具块分离的跟随模具块的移动;部件,所述部件用于检测被推动的模具块的速度,并且基于所述检测速度评估所述热膨胀间隙的尺寸,并且提供反映测量的所述热膨胀间隙的操作者输出信号。
2.如权利要求1所述的管道波纹器,其特征在于,用于检测所述模具块的移动的所述传感器是边缘检测装置,所述边缘检测装置提供与所述边缘传感器检测所述跟随模具块的前缘所需的时间相对应的信息。
3.如权利要求2所述的管道波纹器,其特征在于,包括处理器,所述处理器使用所述时间信息和检测的速度,以输出所述热膨胀间隙的距离计算结果。
4.如权利要求3所述的管道波纹器,其特征在于,如果测量的热膨胀间隙小于预定最小值,所述处理器产生操作报警指示。
5.如权利要求4所述的管道波纹器,其特征在于,如果测量的热膨胀间隙超过预定最大值,所述处理器产生操作报警指示。
6.如权利要求4所述的管道波纹器,其特征在于,包括用于所述模具块的可变冷却装置的控制器;并且如果测量的热膨胀间隙小于所述预定最小值,所述控制器从所述处理器接收信号以增加所述可变冷却装置。
7.如权利要求4所述的管道波纹器,其特征在于,包括用于所述管道波纹器的自动长度调节装置的控制器;并且如果所述测量的热膨胀间隙小于所述预定最小值,所述控制器接收来自所述处理器的信号,以增加所述管道波纹器的长度。
8.如权利要求3所述的管道波纹器,其特征在于,包括用于调节所述管道波纹器的长度的自动长度调节装置和控制器;并且如果测量的热膨胀间隙小于预定最小值,所述控制器接收来自所述处理器的信号,以增加所述管道波纹器的所述长度。
9.如权利要求8所述的管道波纹器,其特征在于,所述控制器与所述处理器进行通信;并且如果测量的热膨胀间隙大于预定最大值,所述处理器产生信号并且将所述信号传送至所述控制器,以减少所述管道波纹器的所述长度。
10.一种用在管道波纹器中的方法,所述管道波纹器具有抵接的循环模具块,所述循环模具块通过驱动装置沿着驱动路径被推动并且返回到所述驱动装置,以限定位于所述驱动装置的两个相邻循环模具块之间的热膨胀间隙,所述两个相邻循环模具块中的领先模具块与所述驱动装置接合,并且跟随模具块以所述热膨胀间隙与所述领先模具块分离;所述方法包含:
检测所述循环模具块沿着所述驱动路径被推动时的速度;
检测所述跟随模具块移动通过所述热膨胀间隙并与所述驱动装置接合的持续时间;
基于检测的速度和检测的持续时间确定所述热膨胀间隙的尺寸;并且
提供确定的所述热膨胀间隙的尺寸的至少一个操作者指示显示。
11.如权利要求10所述的方法,其特征在于,包括:
如果确定的所述热膨胀间隙的尺寸小于预定最小值,提供报警信号。
12.如权利要求11所述的方法,其特征在于,包括:
如果确定的所述热膨胀间隙的尺寸大于预定最大值,提供报警信号。
13.如权利要求10、11或12所述的方法,其特征在于,所述管道波纹器包括用于从所述循环模具块移除热量的可变冷却装置;所述方法进一步包括:
如果确定的所述热膨胀间隙的尺寸低于预定最小值,根据确定的所述热膨胀间隙的尺寸改变所述可变冷却装置,以从所述循环模具块移除热量。
14.如权利要求10、11或12所述的方法,其特征在于,所述管道波纹器包括用于增加或减少所述波纹器的长度从而改变所述热膨胀间隙的可变调节装置;所述方法进一步包括:
如果确定的所述热膨胀间隙的尺寸低于预定最小值,根据确定的所述热膨胀间隙的尺寸自动改变所述可变调节装置,以增加所述管道波纹器的所述长度。
15.如权利要求14所述的方法,其特征在于,如果确定的所述热膨胀间隙的尺寸超过预定最大值,所述方法根据确定的所述热膨胀间隙的尺寸自动改变所述可变调节装置,以减少所述管道波纹器的所述长度。
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