CN107020732A - 一种生产塑料管的双向拉伸法 - Google Patents
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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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
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- 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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
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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
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- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
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- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2203/18—Applications used for pipes
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
本发明提供一种生产塑料管的双向拉伸法,是通过在挤出机管坯出口前方设置冷却箱,所述冷却箱中设有椭圆形气囊,所述椭圆形气囊正对所述挤出机的出口,并且所述椭圆形气囊的长直径与所述挤出机出口中心线重合,所述椭圆形气囊的长直径至少为所述冷却箱长度的2/3,所述椭圆形气囊的短直径大于所述挤出机的出口直径,所述冷却箱出口处设有牵引机实现;所述方法包括:在椭圆形气囊中通入气体,在冷却箱中通入冷却介质;从挤出机中挤出塑料管坯,并启动牵引机牵引;随着塑料管坯持续推入冷却箱中,椭圆形气囊对塑料管坯施加径向拉伸力,而牵引机对塑料管坯施加轴向牵引力,待塑料管坯达到指定长度后完成加工。
Description
技术领域
本发明属于塑料管材加工技术领域,具体涉及一种生产塑料管的双向拉伸法。
背景技术
塑料管材可广泛应用于输配水管网、承压排水管道、建筑、农田灌溉、电力、通讯保护等领域。现有生产塑料管材的生产技术大多比较复杂并且成本较高,核心工艺是取向加工工艺,该工艺是把挤出成型的管材经过预热后进行环向和轴向拉伸,使材料在取向方向上获得更加优异的力学性能,为了进一步拓展塑料管材的应用范围,有必要进一步开发可以适应塑料管径变化的生产工艺。
发明内容
本发明的目的是提供一种生产塑料管的双向拉伸法,所得到的塑料管强度高、韧性好、抗冲击、抗疲劳,可以进一步拓展塑料管材的应用范围。本发明的技术方案为:
一种生产塑料管的双向拉伸法,是通过在挤出机管坯出口前方设置冷却箱,所述冷却箱中设有椭圆形气囊,所述椭圆形气囊正对所述挤出机的出口,并且所述椭圆形气囊的长直径与所述挤出机出口中心线重合,所述椭圆形气囊的长直径至少为所述冷却箱长度的2/3,所述椭圆形气囊的短直径大于所述挤出机的出口直径,所述冷却箱出口处设有牵引机实现;所述方法包括以下步骤:在所述椭圆形气囊中通入气体,在所述冷却箱中通入冷却介质;从挤出机中挤出塑料管坯,并启动牵引机牵引;随着塑料管坯持续推入冷却箱中,椭圆形气囊对塑料管坯施加径向拉伸力,而牵引机对塑料管坯施加轴向牵引力,待塑料管坯达到指定长度后完成加工。
进一步地,所述塑料管包括PVC塑料管和PE塑料管。
进一步地,所述PVC塑料管由以下重量份的原料组成:PVC树脂95~105份,碳酸钙14~16份,ACR助剂1~3份,CPE助剂4~6份,PE蜡1~2份,稳定剂5~6份,着色剂0.4~0.6份。
进一步地,所述方法还包括在混合机内加入PVC树脂和碳酸钙混合均匀,控制搅拌速度为2000~3000r/min、温度为80~90℃加入剩余原料混合均匀,降至40~45℃出料并输送至挤出机。
进一步地,所述椭圆形气囊上设有气管,所述气管与外部充气装置相连。
进一步地,所述椭圆形气囊外壁涂覆有润滑剂。
进一步地,所述双向拉伸法得到的塑料管材的直径最长为初始管材直径的两倍。
本发明的有益效果为:采用本发明的加工方法可以出产大口径的塑料管材,并且所得到的塑料管强度高、韧性好、抗冲击、抗疲劳,可以进一步拓展塑料管材的应用范围;此外,本发明可大幅度节省设备投入,比传统加工方法生产出的塑料管材的硬度、韧性、抗压性、以及环刚度都有所提升,在同等性能指标下本发明的塑料管材的管壁更薄,大大节省了原材料。
附图说明
图1为本发明实施采用的冷却定形装置,其中1-挤出机,2-气管,3-管材,4-冷却箱,5-椭圆形气囊,6-牵引机。
具体实施方式
下面结合附图和具体的实施例对本发明做进一步详细说明,所述是对本发明的解释而不是限定。
实施例1
一种生产PVC塑料管的双向拉伸法,是通过在挤出机管坯出口前方设置冷却箱,所述冷却箱中设有椭圆形气囊,所述椭圆形气囊上设有气管,所述气管与外部充气装置相连,所述椭圆形气囊外壁涂覆有液体石蜡润滑剂,所述椭圆形气囊正对所述挤出机的出口,并且所述椭圆形气囊的长直径与所述挤出机出口中心线重合,所述椭圆形气囊的长直径为所述冷却箱长度的2/3,所述椭圆形气囊的短直径为挤出机的出口直径的1.2倍,所述冷却箱出口处设有牵引机实现,结构如图1所示,所述方法包括以下步骤:按照以下重量份的原料:PVC树脂100份,碳酸钙15份,ACR助剂2份,CPE助剂5份,PE蜡1份,稳定剂5.5份,着色剂0.5份,先在混合机内加入PVC树脂和碳酸钙混合均匀,控制搅拌速度为3000r/min、温度为80~85℃加入剩余原料混合均匀,降至40~45℃出料并输送至挤出机;在椭圆形气囊中通入气体,在冷却箱中通入冷却介质;从挤出机中挤出PVC塑料管坯,并启动牵引机牵引;随着PVC塑料管坯继续推入冷却箱中,椭圆形气囊对PVC塑料管坯施加径向拉伸力,而牵引机对PVC塑料管坯施加轴向牵引力,待PVC塑料管坯达到指定长度后完成加工,得到直径增大0.2倍的PVC塑料管材。
实施例2
一种PVC塑料变径管材的加工方法,是通过在挤出机管坯出口前方设置冷却箱,所述冷却箱中设有椭圆形气囊,所述椭圆形气囊上设有气管,所述气管与外部充气装置相连,所述椭圆形气囊外壁涂覆有液体石蜡润滑剂,所述椭圆形气囊正对所述挤出机的出口,并且所述椭圆形气囊的长直径与所述挤出机出口中心线重合,所述椭圆形气囊的长直径为所述冷却箱长度的2/3,所述椭圆形气囊的短直径为挤出机的出口直径的2倍,所述冷却箱出口处设有牵引机实现,结构如图1所示,所述方法包括以下步骤:按照以下重量份的原料:PVC树脂100份,碳酸钙15份,ACR助剂2份,CPE助剂5份,PE蜡1份,稳定剂5.5份,着色剂0.5份,先在混合机内加入PVC树脂和碳酸钙混合均匀,控制搅拌速度为3000r/min、温度为80~85℃加入剩余原料混合均匀,降至40~45℃出料并输送至挤出机;在椭圆形气囊中通入气体,在冷却箱中通入冷却介质;从挤出机中挤出PVC塑料管坯,并启动牵引机牵引;随着PVC塑料管坯继续推入冷却箱中,椭圆形气囊对PVC塑料管坯施加径向拉伸力,而牵引机对PVC塑料管坯施加轴向牵引力,待PVC塑料管坯达到指定长度后完成加工,得到直径增大1倍的PVC塑料管材。
实施例1和实施例2所制备的PVC塑料管材在产品质量监督检验院的质检结果如下:
以上实施例仅用于说明本发明的技术方案,并不用于限制本发明,在本发明精神和原则范围内所做的任何修改、替换和改进,均应包含在本发明的保护范围之内。
Claims (7)
1.一种生产塑料管的双向拉伸法,其特征在于所述双向拉伸法是通过在挤出机管坯出口前方设置冷却箱,所述冷却箱中设有椭圆形气囊,所述椭圆形气囊正对所述挤出机的出口,并且所述椭圆形气囊的长直径与所述挤出机出口中心线重合,所述椭圆形气囊的长直径至少为所述冷却箱长度的2/3,所述椭圆形气囊的短直径大于所述挤出机的出口直径,所述冷却箱出口处设有牵引机实现;所述方法包括以下步骤:在所述椭圆形气囊中通入气体,在所述冷却箱中通入冷却介质;从挤出机中挤出塑料管坯,并启动牵引机牵引;随着塑料管坯持续推入冷却箱中,椭圆形气囊对塑料管坯施加径向拉伸力,而牵引机对塑料管坯施加轴向牵引力,待塑料管坯达到指定长度后完成加工。
2.根据权利要求1所述的一种生产塑料管的双向拉伸法,其特征在于所述塑料管包括PVC塑料管和PE塑料管。
3.根据权利要求2所述的一种生产塑料管的双向拉伸法,其特征在于所述PVC塑料管由以下重量份的原料组成:PVC树脂95~105份,碳酸钙14~16份,ACR助剂1~3份,CPE助剂4~6份,PE蜡1~2份,稳定剂5~6份,着色剂0.4~0.6份。
4.根据权利要求3所述的一种生产塑料管的双向拉伸法,其特征在于所述方法还包括在混合机内加入PVC树脂和碳酸钙混合均匀,控制搅拌速度为2000~3000r/min、温度为80~90℃加入ACR助剂、CPE助剂、PE蜡、稳定剂、着色剂,混合均匀,降至40~45℃出料并输送至挤出机。
5.根据权利要求1所述的一种生产塑料管的双向拉伸法,其特征在于所述椭圆形气囊上设有气管,所述气管与外部充气装置相连。
6.根据权利要求1所述的一种生产塑料管的双向拉伸法,其特征在于所述椭圆形气囊外壁涂覆有润滑剂。
7.根据权利要求1所述的一种生产塑料管的双向拉伸法,其特征在于所述双向拉伸法得到的PVC塑料管材的直径最长为初始管材直径的两倍。
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CN102773985A (zh) * | 2012-07-26 | 2012-11-14 | 浙江永达实业集团有限公司 | 一种pe薄壁管气囊法生产设备 |
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CN205097515U (zh) * | 2015-10-09 | 2016-03-23 | 沈阳市通用塑料厂 | 一种pvc管材冷却定形装置 |
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CN1798646A (zh) * | 2003-04-08 | 2006-07-05 | 温尼德斯有限公司 | 用于控制塑料管定向过程的方法和装置 |
CN101486820A (zh) * | 2009-02-16 | 2009-07-22 | 黄山琦源塑管阀门有限公司 | 一种pvc材料及其制备方法 |
CN102773985A (zh) * | 2012-07-26 | 2012-11-14 | 浙江永达实业集团有限公司 | 一种pe薄壁管气囊法生产设备 |
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