CN104976440A - 一种抗划痕聚乙烯管及生产方法 - Google Patents

一种抗划痕聚乙烯管及生产方法 Download PDF

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CN104976440A
CN104976440A CN201510384146.5A CN201510384146A CN104976440A CN 104976440 A CN104976440 A CN 104976440A CN 201510384146 A CN201510384146 A CN 201510384146A CN 104976440 A CN104976440 A CN 104976440A
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districts
layer
scratching
polyethylene pipe
pipe
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王紫清
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SICHUAN QINGCHUAN PININGS Co Ltd
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    • 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
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F16L9/133—Rigid pipes of plastics with or without reinforcement the walls consisting of two layers
    • 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
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C48/355—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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
    • B29C48/916—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means using vacuum
    • 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
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92904—Die; Nozzle zone
    • 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
    • B29C48/911—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

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Abstract

本发明提供了一种抗划痕聚乙烯管及生产方法，其中抗划痕聚乙烯管由内层的抗压层与外层的抗划层组成，抗划层厚度为5mm以上。本发明采用复合双层模外共挤方式生产，过程为：先将塑料粒进行4小时85℃的干燥，然后开始挤出，并将挤塑机的主机筒温度、共挤机的机筒温度、挤塑机的模头温度按分区精细设置，主机挤出量445公斤/小时，共挤机挤出量55公斤/小时。塑胶管牵引速度1.286米/分钟。真空冷却箱内的真空度为-0.064兆帕，水温30度。本发明具备常规聚乙烯管材应有的抗压性能，外层设置抗划层，具有耐开裂性能，能够应对苛刻的环境，并在外壁有划痕以及点载荷的作用下，仍然能够达到l00年的设计使用寿命。

Description

一种抗划痕聚乙烯管及生产方法
技术领域
本发明涉及到一种抗划痕的聚乙烯管及该种聚乙烯管的生产方法。
背景技术
聚乙烯管大量用于市政燃气和给水领域。
在市政燃气和给水领域，聚乙烯管主要通过开挖地面，然后将管道放入开挖槽后，再进行填土的方式安装。这种传统安装方式的流程很完善并久经考验，但安装过程中需开挖土方，费时费工，开挖沟槽对周围出行者和车辆交通也造成很大不便。另外，对于基础设施工程项目而言，还会出现间接成本(无法量化的成本)延迟的现象，典型的例子是管道安装几年后，由于土层结构逐步沉降，导致道路或路面下降。
而如果采用非开挖技术，就可以避免这种问题出现，并且可以减少社会效应成本(如减少碳排放以及减少扰民等)。
为了解决这一问题，出现了更好的非开挖施工管道安装方法，如犁入法、定向钻法、无沙床填埋、衬管法、u型衬管法、爆管法等，与标准的开挖沟槽沙床安装法(假设费用为100％)相比，非传统管道安装技术由于无沙床可节约20％的费用，对于先进的非开挖技术，甚至可节约50％。其中考虑到的直接费用包括：原材料(HDPE管材)费用、管材运输到工地现场的费用、安装费用、土方工程费用、沙子运输和填埋费用、路面恢复费用。此外，还能减少施工时间，节省运输成本和能源。
但这些非传统管道安装施工中，PE管道不可避免地会受到外壁划伤(尤其是衬入旧的金属管道中、定向钻施工)，局部石头顶住管材外壁形成的点载荷会在管材内壁形成应力集中，这些应力集中部位就是管材的薄弱点。管道外表面出现划痕导致壁厚减薄，同时划痕处的出现管壁应力集中效应、慢速裂纹扩展出现，导致壁厚进一步减薄，带来的管材使用寿命隐患。所以，我们需要一种能在非传统的管道安装过程中，能有效抵抗管道表面划伤的管材。
现有的塑胶管其不利于使用，其原因在于，一方面，其塑胶管挤出的用料选料不当，造成挤出的塑胶管无法达到使用要求。另一方面，塑胶管的挤出工艺存在较大的缺点，使挤出的塑胶管无论如何也达不到应用要求。因此，我们也需要一种在现在生产设备的条件下，能有效提高挤出塑胶管质的工艺流程。
发明内容
为了解决上述问题，本发明提供了一种抗划痕聚乙烯管及该种抗划痕聚乙烯管的生产方法。
本发明的抗划痕聚乙烯管由内层的抗压层与外层的抗划层组成。所述的内层抗压层采用PE100原材料，外层抗划层采用PE100-RC原材料，所述的外层抗划层厚度为5mm以上。
本发明提供的一种抗划痕聚乙烯管的生产方法，具体为，采用复合双层模外共挤方式生产。
如上所述的一种抗划痕聚乙烯管的生产方法，更一步地具体说明为，按如下过程生产：
（1）.先将塑料粒置入干燥机进行4～4.5的干燥，干燥环境设置为85℃。
（2）.将塑料粒加入挤塑机开始塑胶管挤出。在挤塑过程中，将挤塑机的主机筒温度按如下方式设置：1区60℃，2区190℃，3区195℃，4区200℃，5区205℃，6区210℃。
将挤塑机的共挤机的机筒温度按如下方式设置：1区60℃，2区195℃，3区200℃，4区205℃，5区210℃。
将挤塑机的模头温度按如下设置：1区210℃，2区210℃，3区210℃，4区210℃，5区210℃，6区210℃，7区225℃，8区225℃，9区230℃，10区230℃。
设置主机挤出量：445公斤/小时，共挤机挤出量：55公斤/小时。
（3）.挤出的塑胶管进入真空冷却箱进行冷却，塑胶管在冷却过程中，其牵引速度：1.286米/分钟。
所述的真空冷却箱内的真空度为-0.064兆帕，冷却水温度30摄氏度。
如上所述的一种抗划痕聚乙烯管的生产方法，更一步地具体说明为，所述的塑料粒为PE100与PE100-RC。
本发明的有益效果在于，因管材采用两层结构设置，内层为抗压层，具备常规聚乙烯管材应有的抗压性能，外层设置抗划层，具有更优异的耐开裂性能，从而具有更高的安全裕度。能够应对苛刻的环境，并在外壁有划痕以及点载荷的作用下，仍然能够达到l00 年的设计使用寿命。
本发明选用的挤出材料为PE100与PE100-RC，其材质经加工后，具备很好的抗划与耐开裂性能。
本发明的工艺为挤塑工作长期的参数分析与总结，达到了合理利用挤塑机的各段温度，使材料在经历各区逐渐的加温过程中，充分发挥材料分子特性，使挤出的塑胶管达到内韧外坚的效果。
说明书附图
图1为本发明结构示意图。
具体实施方式
实施例一：
本实施例在具体的生产过程中，采用塑胶管挤出机进行加工生产，一体成型。
在挤出过程中，内层抗压层采用PE100原材料，外层抗划层采用PE100-RC原材料。其中，外层抗划层厚度为5mm。
本实施例采用复合双层模外共挤方式生产。具体过程如下：
（1）.先将塑料粒置入干燥机进行4的干燥，干燥环境设置为85℃。
（2）.将塑料粒塑料粒（PE100与PE100-RC）加入挤塑机开始塑胶管挤出。在挤塑过程中，将挤塑机的主机筒温度按如下方式设置：1区60℃，2区190℃，3区195℃，4区200℃，5区205℃，6区210℃。
将挤塑机的共挤机的机筒温度按如下方式设置：1区60℃，2区195℃，3区200℃，4区205℃，5区210℃。
将挤塑机的模头温度按如下设置：1区210℃，2区210℃，3区210℃，4区210℃，5区210℃，6区210℃，7区225℃，8区225℃，9区230℃，10区230℃。
设置主机挤出量：445公斤/小时，共挤机挤出量：55公斤/小时。
（3）.挤出的塑胶管进入真空冷却箱进行冷却，塑胶管在冷却过程中，其牵引速度：1.286米/分钟。
真空冷却箱内的真空度为-0.064兆帕，冷却水温度30摄氏度。
   本实施例的聚乙烯管可用于犁入法的管道铺设，在犁入法铺设过程中，用铰车或拖拉机带动犁沟刀，刀上装有掘进机，犁出孔道，塑料管随之在掘进机后部被拖带前进。拖入长度可超过300米，视聚乙烯管的尺寸、类型及土质而定。
本实施例的聚乙烯管采用犁入埋管法时，宜在平坦、地势变化缓慢、无岩石块的较坚实土壤中使用。也能应对较复杂土壤情况。本实施例的聚乙烯管能够达到l00 年的设计使用寿命。
以上所述，仅是本发明的较佳实施例而已，并非对本发明的技术范围作任何限制，故凡是依据本发明的技术实质对以上实施例所作的任何细微修改、等同变化与修饰，均仍属于本发明技术方案的范围内。

Claims (4)

1.一种抗划痕聚乙烯管，其特征在于，由内层的抗压层与外层的抗划层组成；所述的内层抗压层采用PE100原材料，外层抗划层采用PE100-RC原材料，所述的外层抗划层厚度为5mm以上。
2.一种抗划痕聚乙烯管的生产方法，其特征在于，采用复合双层模外共挤方式生产。
3.如权利要求2所述的一种抗划痕聚乙烯管的生产方法，其特征在于，具体按如下过程生产：
（1）.先将塑料粒置入干燥机进行4～4.5的干燥，干燥环境设置为85℃；
（2）.将塑料粒加入挤塑机开始塑胶管挤出；在挤塑过程中，将挤塑机的主机筒温度按如下方式设置：1区60℃，2区190℃，3区195℃，4区200℃，5区205℃，6区210℃；
将挤塑机的共挤机的机筒温度按如下方式设置：1区60℃，2区195℃，3区200℃，4区205℃，5区210℃；
将挤塑机的模头温度按如下设置：1区210℃，2区210℃，3区210℃，4区210℃，5区210℃，6区210℃，7区225℃，8区225℃，9区230℃，10区230℃；
设置主机挤出量：445公斤/小时，共挤机挤出量：55公斤/小时；
（3）挤出的塑胶管进入真空冷却箱进行冷却，塑胶管在冷却过程中，其牵引速度：1.286米/分钟；
所述的真空冷却箱内的真空度为-0.064兆帕，冷却水温度30摄氏度。
4.如权利要求3所述的一种抗划痕聚乙烯管的生产方法，其特征在于，所述的塑料粒为PE100与PE100-RC。
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