CN201399890Y - 应用于超高分子量聚乙烯管挤出的超声波震动模头 - Google Patents

应用于超高分子量聚乙烯管挤出的超声波震动模头 Download PDF

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Publication number
CN201399890Y
CN201399890Y CN2008201849400U CN200820184940U CN201399890Y CN 201399890 Y CN201399890 Y CN 201399890Y CN 2008201849400 U CN2008201849400 U CN 2008201849400U CN 200820184940 U CN200820184940 U CN 200820184940U CN 201399890 Y CN201399890 Y CN 201399890Y
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China
Prior art keywords
die head
molecular weight
high molecular
weight polyethylene
ultra
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Expired - Fee Related
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CN2008201849400U
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English (en)
Inventor
林涛
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Jiangsu Xingxin Pipeline Project Co., Ltd.
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ZHENJIANG DAYANG XINGXIN PIPELINE CO Ltd
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Priority to CN2008201849400U priority Critical patent/CN201399890Y/zh
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/30Extrusion nozzles or dies
    • B29C48/32Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion 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
    • B29C48/09Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/14Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration
    • B29C48/146Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration in the die
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2791/00Shaping characteristics in general
    • B29C2791/004Shaping under special conditions
    • B29C2791/008Using vibrations during moulding

Abstract

本实用新型为一种应用于超高分子量聚乙烯管挤出的超声波震动模头,其包括挤出机和一个模头,特征是:在紧贴模头的上、下方,各垂直设置有超声波发生器。本实用新型使挤出生产过程变成连续性,改变了以往断断续续挤出的现象。由于在超高分子量聚乙烯挤出加工的模头部分加设了超声波发生器,在主剪切流方向上增加了一个附加交变应力,强化了超高分子量聚乙烯的物理和化学变动过程,从而增加了超高分子量聚合物熔体的流动性,同时,由于超声波周期性的剪切震动,能产生很多热量,使模头内熔体的粘度变小,因此使挤出流率增大,消耗功率就减少,且模头出口处的挤出膨胀变小,并能提高成型制品的物理和机械性能。

Description

应用于超高分子量聚乙烯管挤出的超声波震动模头
技术领域
本实用新型涉及一种聚乙烯管挤出模头,尤其是专应用于超高分子量聚乙烯管挤出的超声波震动模头。
背景技术
超高分子量聚乙烯是指平均相对分子量在150万以上的线性结构聚乙烯,由于其分子量极高,因而具有优异的综合性能。超高分子量聚乙烯管的突出优点是:摩擦系数低,且带有自润滑特性,具有的耐磨性能为碳钢和不锈钢的7-10倍,耐冲击性、耐低温性、耐化学性和耐环境应力开裂性等都非常优异。但是,由于超高分子量聚乙烯的熔融粘度极高,流动性极差,因而不能用常规的热塑性塑料加工的方法进行直接挤出或注射成型,对其成型加工比较困难。
目前,国内生产超高分子量聚乙烯管的方法主要采用:(1)柱塞推压管材成型工艺。该方法只能一段接一段地成型,而不能连续生产,速度很慢;(2)在挤出生产过程中掺进其他成份,采用共混改性的方法,以改善超高分子量聚乙烯的流动性能。此方法比较麻烦,也降低了材料的性能。
发明内容
本实用新型所要解决的技术问题:是要提供一种能提高超高分子量聚乙烯流动性并利于挤出的应用于超高分子量聚乙烯管挤出的超声波震动模头。
为解决以上技术问题所采用的技术方案是这样的:本实用新型包括挤出机和一个模头,其特征是:在紧贴模头的上、下方,各垂直设置有超声波发生器。
由于采用以上技术,其效果是显而易见的:
1、由于在超高分子量聚乙烯挤出加工的模头部分加设了超声波发生器,故而主剪切流方向上增加了一个附加交变应力,强化了超高分子量聚乙烯的物理变化过程,从而增加了超高分子量聚合物熔体的流动性。同时,由于超声波周期性的剪切震动能产生很多热量,这些热量使模头内熔体的粘度变小,因此使挤出流率增大,挤出过程中所消耗的功率就减少,而且模头出口处的挤出膨胀变小,并能提高成型制品的物理和机械性能。
2、使挤出生产过程变成连续性,改变了以往断断续续挤出的现象。
3、结构特别简单。
附图说明
图1为本实用新型结构图。
图中:1、超声波发生器 2、模头 3、挤出机
具体实施方式
参照图1,本实用新型在实施时,在已有技术的基础上,即在挤出机3一侧并紧贴模头2的上、下方,各垂直设置超声波发生器1。
挤出机3开机后,由于上下超声波的震动,便对模头内的超高分子量聚乙烯熔体产生了作用,使熔体介质获得了周期性的震荡剪切和体积应变,同时,超声波在熔体介质中引起搅动和空化作用以及机械作用。这些综合作用,使得模头内部压力降低,出口膨胀减小。在相同挤出流率的前提下,超声波频率越高,模头内的压力就越小,震幅越大,模头内的压力也就越小。周期性的剪切震动还产生大量的热量,使熔体的粘度变小,增加了流动性,所以挤出流率就增大,挤出功率就降低,使模头出口处的挤出膨胀大为减小,并能提高成型制品的物理和机械性能,同时使挤出生产过程变成连续性,改变了以往断断续续挤出的现象。

Claims (1)

1、一种应用于超高分子量聚乙烯管挤出的超声波震动模头,其包括挤出机(3)和模头(2),特征是:在紧贴模头(2)的上、下方,各垂直设置有超声波发生器(1)。
CN2008201849400U 2008-09-02 2008-09-02 应用于超高分子量聚乙烯管挤出的超声波震动模头 Expired - Fee Related CN201399890Y (zh)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102794896A (zh) * 2012-09-04 2012-11-28 贵州省复合改性聚合物材料工程技术研究中心 聚合物超声熔融双阶挤出的方法及装置
CN111409293A (zh) * 2020-03-31 2020-07-14 华南理工大学 超声增强长纤维增强聚合物复合材料的浸渍方法及超声增强长纤维增强聚合物复合材料
WO2021196851A1 (zh) * 2020-04-02 2021-10-07 苏州美梦机器有限公司 物料输送系统和方法
CN115339099A (zh) * 2022-08-23 2022-11-15 西安交通大学 一种基于双超声振子共振的高粘度材料挤出装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102794896A (zh) * 2012-09-04 2012-11-28 贵州省复合改性聚合物材料工程技术研究中心 聚合物超声熔融双阶挤出的方法及装置
CN102794896B (zh) * 2012-09-04 2015-10-07 贵州省复合改性聚合物材料工程技术研究中心 聚合物超声熔融双阶挤出的方法及装置
CN111409293A (zh) * 2020-03-31 2020-07-14 华南理工大学 超声增强长纤维增强聚合物复合材料的浸渍方法及超声增强长纤维增强聚合物复合材料
WO2021196851A1 (zh) * 2020-04-02 2021-10-07 苏州美梦机器有限公司 物料输送系统和方法
CN115339099A (zh) * 2022-08-23 2022-11-15 西安交通大学 一种基于双超声振子共振的高粘度材料挤出装置

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ASS Succession or assignment of patent right

Owner name: JIANGSU XINGXIN ENGINEERING PIPING CO., LTD.

Free format text: FORMER OWNER: DAYANGXINGXIN ENGINEERING PIPELINE CO., LTD., ZHENJIANG

Effective date: 20120613

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Address after: 212215 the west side of the prosperous bridge, prosperous town, Jiangsu, Yangzhong

Patentee after: Jiangsu Xingxin Pipeline Project Co., Ltd.

Address before: 212215 prosperous industrial zone, Yangzhong, Jiangsu

Patentee before: Zhenjiang Dayang Xingxin Pipeline Co., Ltd.

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Granted publication date: 20100210

Termination date: 20130902