CN1119227C - 用于制造塑料管的装置 - Google Patents

用于制造塑料管的装置 Download PDF

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CN1119227C
CN1119227C CN99811201A CN99811201A CN1119227C CN 1119227 C CN1119227 C CN 1119227C CN 99811201 A CN99811201 A CN 99811201A CN 99811201 A CN99811201 A CN 99811201A CN 1119227 C CN1119227 C CN 1119227C
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乌尔里希·哈伯特
约阿西姆·维尔纳
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Egeplast Werner Strumann GmbH and Co KG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
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    • B29C48/355—Conveyors for extruded articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
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    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
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    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
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    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
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    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular films
    • B29C48/913—Cooling of hollow articles of tubular films externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material

Abstract

本发明涉及用于制造塑料管的装置，其具有一挤塑机、一朝生产方向连接在挤塑机上的管头部和一定径站(3)，其中在生产期间管尺寸可在定径站(3)内校准。

Description

用于制造塑料管的装置
技术领域
本发明涉及一种用于制造塑料管的装置。
背景技术
在塑料管的制造装置中存在的问题是，不同外径的管必须同时以不同的壁厚来制造。在现有技术中为此要求必须按照管的外径和要求的、通常根据外径规定的管的壁厚更换相应的工具。这导致机器的停产、工具更换的高劳动消耗和塑料的材料损失，直到可以重新拉制出新管为止。为了在现有的外径下能够制造较小壁厚的管，为此一次相应的拉制是不可能的，因为塑料的分子链被拉伸并由此定向，从而其使管的强度受到不利的影响，而要求收缩成形和折叠成形。
由构成同一类的DE 24 12 818已知一种用于从挤管机排出的热塑性塑料管的定径装置，其中在这种已知装置中朝管的生产方向相互接连地设置多个定径叶片。每一定径叶片具有一定径通口，其对所有的定径叶片都是相同的并且是不能改变的。每一定径叶片同一个可以向上取出的叶片扇形件相配合，叶片扇形件在生产的开始阶段可以取去，以便易于将离开挤塑机或管头部的管插入定径通口中。其中在生产过程中改变管直径是不可能的而且没有建议那样做。
由DE 35 21 321已知，多个金属波纹管设置在一定径站，通过伸展或压缩可以改变该金属波纹管的内径。借此可以使其符合于在冷却时出现的塑料材料的收缩而改变的外径，以便借此在冷却阶段和在一定情况下缩小的管外径时也能够将管满意地输送至定径站。
最后，由WO95/27601已知，在不是同一类的制造塑料管的方法中成形工具设置在待成形的管之内部，该成形工具由多个辊构成，其中通过由成形工具决定的圆周的外径之或多或少的扩张可以改变管直径。但其中管可以借助一薄板来形成，该薄板环绕这个成形工具，其中薄板的两端边缘可以相互焊接在一起。特别的压辊对两薄板连接时产生的焊缝施加压力，使在外面应该不再能看出这个焊缝。
发明内容
本发明的目的在于，提供一种装置，以便在管的生产期间不中断生产运行就可在连续的挤塑过程中达到在多个塑料管尺寸之间的完全自动控制的转换，其中外径和管壁厚按照顾客要求或标准一起校准。
为实现上述目的，按本发明提供了这样一种用于制造塑料管的装置，其具有一挤塑机、一朝生产方向连接的管头部和一定径站，定径站具有定径工具，其贴紧管的外壁，其特征在于，作为定径工具设置沿待校准的管的圆周接连地以彼此间隔一定距离布置的许多叶片，并且这些叶片是径向可调的，从而使得定径工具可调节在不同的管径位置上，其中同样朝管的生产方向设置许多这样的叶片环，其各个叶片设置成使其对前面的叶片环的叶片具有间隙。
在必要时已预定尺寸的物料管线可以按照本发明进入定径站，其中可以校准不同的管尺寸。虽然由WO96/36457已知，在定径站中借助于楔效应可以对各个敞开的定径环的直径作微小的改变来进行微小的定径校准，但是利用这样的装置不能达到管外径的改变，而只能防止其收缩行为。
按照本发明设置的定径站优选通过许多叶片构成，它们沿圆周布置在待校准的管的外面并且设置成总是相互间隔一定距离而形成一叶片环。其中朝管的生产方向在定径站内设置许多这样的叶片环，各个叶片环的各个叶片彼此间具有间隙，以便使每个环的各个叶片相对于后面的环或前面的环能够进行顺利地调整。
叶片的调整通过机动或手动来实现，其中通过单独的手操纵装置可以同时调整所有的叶片环。
叶片贴紧在管的外面的圆弧可以满足通过的最大管直径。当通过较小的管直径时，所处理的管不是理想的圆形而是由较小的相互相接的圆弧形构成，它们接着在定径浴池内得到弥补。
代替上述的叶片也可以设置调整扇形件，其构成一个朝管的纵向方向的管形体，其中构成该管形件的各个扇形狭条相互嵌接，以便当向较大直径调整时该扇形件的部分也总是贴紧在管上。
定径工具通过贴紧在管的外面的辊来制作也是可能的，各辊借助受控的弹簧或杠杆确定一管外圆周，其符合要求的管尺寸。
附图说明
本发明的一个实施例以下借助于附图加以说明。附图中：
图1制造装置的总图；
图2朝生产方向通过定径头部截取的剖面；
图3在沿图2中线3-3截取的剖面内接连地设置的叶片环，以及
图4一个改变的实施形式。
具体实施方式
图1中可见一可调整的管头部，其朝生产方向连接在一图中未示出的挤塑机上。在可调整的管头部1上连接一真空抽吸罩2，其配备有真空连接管5，并且其中设置了测量装置，其根据要求的管外径校准抽吸罩中控制的真空度，以便借此使管形熔化物流校准到、即吸收到要求的外径，其中在真空抽吸罩2中已经可以实现熔化管线的预冷。在真空抽吸罩2中可以与可调整的管头部相结合校准一精确的管壁厚，其中可以根据管外径改变管壁厚。
在真空抽吸罩2上连接一定径站3。其中通过机械式集中调整实现熔化管线的和已经部分硬化的管的外径之精确校准，在该定径站中对所有的可能选用的塑料都可使用。在该定径站中也可以用不同的壁覆盖层来校准多个尺寸。
在朝生产方向连接在定径站3上的真空定径浴池4随后通过喷水实现塑料管的冷却和硬化，其中在图1中可见一水入口6和一水出口7。此外，一真空连接管8连接在真空定径浴池4上并且位于真空定径浴池4中的管10沿各支承辊11移动，各支承辊11也可视为定径辊并且可以校准到要求的管直径。管10的外表面较硬并且管10穿过真空密封件9离开真空定径浴池4，真空密封件9或独立校准到管直径或根据在定径站3和/或在真空定径浴池4中校准过的管尺寸来校准。在真空密封件9中可以设置多个成形辊，其通过液压或机械弹簧操作，其中在管通过的同时可以输入用于润滑和密封的水。
图2和3示出通过定径站3的一个实施形式的剖面。可看出在定径站的外壁44内设置了许多叶片40，其沿管10的圆周布置并贴紧在管10的管外壁上。每个叶片40的贴紧的边缘41具有圆弧形，其符合管10可能的最大外径。由图2和图3可知许多叶片环42和43朝管的生产方向接连地设置。在图3的图中设置了45个叶片环并且按照图2每个叶片环42或43由六个叶片构成，但本发明对此决无限制。
在按照图2的实施形式中设置了许多伺服电机45，其共同操作而导致所有的叶片环的共同调整，其中在这里伺服电机45的调整也可以与抽吸罩2中的相应控制和定径浴池4一起实现集中控制。
图4示出一个实施形式，其中许多单辊50贴紧在待制造的管的外壁上，各辊由各杠杆51支承，各杠杆51借助于调节装置是可动的，以便借此可以校准要求的辊圆周形成的内径。调节装置52和杠杆51设置在一调节轮53上，使通过一机动装置可以使之旋转。

Claims (5)

1.用于制造塑料管的装置，其具有一挤塑机、一朝生产方向连接的管头部(1)和一定径站(3)，定径站(3)具有定径工具(40)，其贴紧管(10)的外壁，其特征在于，作为定径工具设置沿待校准的管(10)的圆周接连地以彼此间隔一定距离布置的许多叶片(40)，并且这些叶片是径向可调的，从而使得定径工具可调节在不同的管径位置上，其中同样朝管(10)的生产方向设置许多这样的叶片环(42、43)，其各个叶片(40)设置成使其对前面的叶片环的叶片(40)具有间隙。
2.按照权利要求1所述的装置，其特征在于，叶片(40)的调整通过机动实现。
3.按照权利要求1所述的装置，其特征在于，叶片的调整由手动实现。
4.按照权利要求1所述的装置，其特征在于，叶片构成为调整扇形件，其构成一朝管的纵向方向的环形体，其中构成该环形体的各个扇形狭条相互嵌接。
5.按照权利要求1前序部分的装置，其特征在于，定径工具由多个辊构成，其贴紧在管的外面并且通过利用上述多个辊的径向调节而使这些辊形成的理想上的直径来调节。
CN99811201A 1998-09-22 1999-08-24 用于制造塑料管的装置 Expired - Fee Related CN1119227C (zh)

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EP1249331B1 (de) 2006-05-31
DE19843340C2 (de) 2001-11-22
CN1473699A (zh) 2004-02-11
US7335010B2 (en) 2008-02-26
EP1115550B1 (de) 2003-04-16
CN1319045A (zh) 2001-10-24
EP1249331A2 (de) 2002-10-16
US20060034965A1 (en) 2006-02-16
ATE327880T1 (de) 2006-06-15
DE19843340A1 (de) 2000-04-06
EP1249331A3 (de) 2002-11-13
ES2266353T3 (es) 2007-03-01
WO2000016962A1 (de) 2000-03-30
DK1115550T3 (da) 2003-07-07
CN1272160C (zh) 2006-08-30
DK1249331T3 (da) 2006-10-02
EP1115550A1 (de) 2001-07-18
ATE237457T1 (de) 2003-05-15
PT1249331E (pt) 2006-10-31
DE59905099D1 (de) 2003-05-22
ES2192102T3 (es) 2003-09-16
DE59913496D1 (de) 2006-07-06
PT1115550E (pt) 2003-08-29

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