WO2017024747A1 - 具有菱形格子骨架中间层的复合管 / 膜及成型方法和装置 - Google Patents

具有菱形格子骨架中间层的复合管 / 膜及成型方法和装置 Download PDF

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Publication number
WO2017024747A1
WO2017024747A1 PCT/CN2015/100079 CN2015100079W WO2017024747A1 WO 2017024747 A1 WO2017024747 A1 WO 2017024747A1 CN 2015100079 W CN2015100079 W CN 2015100079W WO 2017024747 A1 WO2017024747 A1 WO 2017024747A1
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WIPO (PCT)
Prior art keywords
die
intermediate layer
parison
film
lattice skeleton
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PCT/CN2015/100079
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English (en)
French (fr)
Inventor
瞿金平
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华南理工大学
广州华新科实业有限公司
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Publication of WO2017024747A1 publication Critical patent/WO2017024747A1/zh

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Classifications

    • 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
    • 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
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
    • 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
    • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
    • 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
    • B29C48/131—Curved 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
    • B29C48/16—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
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/33—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles with parts rotatable relative to each other
    • 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
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only

Definitions

  • the present invention relates to the field of polymer continuous molding technology, and more particularly to a composite pipe/film having a diamond-shaped lattice skeleton intermediate layer and a molding method and apparatus.
  • Polymer materials have an important position in the field of squeezed pipe and blown film due to their excellent corrosion resistance, long-term stability, convenient installation and maintenance, etc., and are widely used in gas transportation, water supply, agricultural irrigation, etc. Rapid.
  • the outstanding advantage of this extrusion device is that the size of the die assembly component can be adjusted according to the actual production needs, and the bidirectional reinforced pipe with different calibers can be produced, and the traditional mandrel can be rotated into a core sleeve. Rotation, but the structure of the device is complicated, and the rotating core sleeve is inconvenient to assemble and disassemble.
  • Professor Wang Qi of Sichuan University developed a new type of rotary extrusion device.
  • the polyethylene (PE) tube was prepared by reverse rotation extrusion of the mandrel and the die. The results showed that the die and the mandrel were reversely rotated.
  • the inner and outer walls of the pipe are subjected to the circumferential stress applied by the rotation of the mandrel and the die, in addition to the axial stress, and the resultant force direction is no longer along the axial direction of the pipe but at a certain angle thereto.
  • the orientation direction of the molecular chain and the string crystal formed by the chain as the primary nucleation point deviate from the axial direction, which enhances the ability of the pipeline to resist crack growth.
  • the structure of the device is complicated, and the effect of the reverse rotation extrusion on the self-reinforcement of the pipe is not obvious.
  • the inner spiral tube is composed of a plurality of convex triangular ribs which are evenly spirally distributed along the inner wall, and the spiral line has a certain angle with the tube axis (theoretically, the spiral line maintains the angle with the tube axis, drainage
  • the tube has the best drainage capacity and ventilation effect).
  • the composite tube or the sandwich tube increases the self-weight of the polymer tube by adding a higher density material or setting a higher density core layer.
  • the object of the present invention is to overcome the deficiencies of the prior art and to provide a composite pipe/film having a diamond-shaped lattice skeleton intermediate layer which is light in weight of a polymer material and can realize self-reinforcing and noise-reducing effects.
  • Another object of the present invention is to provide a method of molding the above composite pipe/film having a rhombic lattice skeleton intermediate layer.
  • a composite pipe/film having a diamond-shaped lattice skeleton intermediate layer which comprises an outer layer, an intermediate layer and an inner layer which are sequentially disposed from the outside to the inside, and the intermediate layer is a diamond-shaped lattice skeleton.
  • the diamond-shaped lattice skeleton is formed by stacking a plurality of forward spiral reinforcing ribs and a plurality of reverse spiral reinforcing ribs, and a plurality of forward spiral reinforcing ribs are located on the inner side of the outer layer, and the plurality of reverse spirals are Ribs are located
  • the above-mentioned composite pipe/film having a rhombic lattice skeleton intermediate layer is formed by: forming a double-layered hollow parison having a ring-shaped cross-sectional shape by a rotary die, and having a plurality of forward spiral reinforcing ribs on the inner side of the outer layer parison;
  • the outer layer parison has a plurality of reverse spiral reinforcing ribs on the outer side, and inflates the layers of the double-layer hollow parison, and the inner layer parison is expanded outward by the internal and external pressure difference, and is fused with the outer
  • the above-mentioned composite pipe/film forming device having a diamond-shaped lattice skeleton intermediate layer comprising a core mold, a die base, an inner die, an outer die, a gear and an air inlet, and a core die and a die base constitute a die
  • the inner die and the outer die form a rotary die; the rotary die is disposed between the core die and the die base, the air inlet plug is disposed in the core die, the gear is disposed on the outer periphery of the rotary die, and the gear and the rotary die
  • a key connection is used between the outer side of the inner die and the inner side of the outer die.
  • the inner die and the outer die are concentrically arranged, and are nested in the extrusion direction of the parison from large to small according to the diameter.
  • the diameter of the outer die is greater than the diameter of the inner die.
  • the outer circumference of the inner die and the outer circumference of the outer die are respectively provided with corresponding gears, and the rotation direction of the inner die is opposite to the rotation direction of the outer die.
  • the outer side of the inner die is provided with a fence, and the inner layer parison having a plurality of reverse spiral reinforcing ribs on the outer side is formed by the rotation of the inner die;
  • the inner layer of the outer die is provided with a fence through the outer port Rotation of the mold, forming an outer layer parison having a plurality of forward spiral reinforcing ribs on the inner side;
  • the forward spiral reinforcing ribs and the reverse spiral reinforcing ribs are stacked on each other to form an intermediate layer having a diamond lattice skeleton, and the inner layer type
  • the side wall of the blank is used as an inner layer
  • the side wall of the outer layer parison is used as an outer layer.
  • the design of the fence structure allows the melt ring to be divided by the fence, and a plurality of spiral reinforcing ribs are formed on the parison and distributed on one side of the annular parison.
  • the cross-sectional shape, arrangement and quantity of the spiral reinforcing ribs are variable. By changing the shape and number of the fence and the rotational speed of the rotating die, the change can be made.
  • the inner nozzle mold and the core mold are respectively provided with gas flow passages, and the gas flow passages in the inner die are in communication with the gas flow passages in the core mold.
  • the gas flow path is inflated between the layers of the double-layer hollow parison, and the high-pressure gas can keep the groove in the diamond-shaped lattice skeleton firm, ensuring that the groove is intact and regular, and avoids deformation due to swelling of the melt outlet.
  • the molding device further includes a cooling air ring, along the extrusion direction of the parison, the cooling air ring is located at the rear side of the air inlet plug, the air inlet plug is disposed in the parison, and the cooling air ring is disposed outside the parison. An internal and external pressure difference is formed between the intake plug and the cooling air ring to radially expand the parison.
  • the rear side of the cooling air ring may also be provided with auxiliary devices such as a sizing device and a traction device in sequence to stretch, tow, and set the parison.
  • auxiliary devices such as a sizing device and a traction device in sequence to stretch, tow, and set the parison.
  • the diameter, etc. enables continuous preparation of the composite pipe/film.
  • the present invention has the following beneficial effects:
  • the composite pipe or the composite film having the diamond-shaped lattice skeleton intermediate layer prepared by the invention has a weight of the composite pipe or the composite film which is significantly lower than that of the conventional product due to the design of the intermediate layer structure, and the same Self-enhancement and noise reduction can also be achieved.
  • a composite pipe or a composite film having a low average density can be continuously formed, and the device has a simple structure and convenient maintenance, and can be applied to manufacture of products of various specifications.
  • the obtained product not only has a significant weight reduction, but also achieves two-way self-reinforcement of the polymer, and the axial strength is remarkably improved; since the composite pipe or the composite film is filled with compressed air, the noise can be reduced.
  • FIG. 1 is a schematic structural view of a diamond-shaped lattice skeleton of a composite pipe/film.
  • FIG. 2 is a schematic structural view of the molding apparatus.
  • FIG. 3 is a schematic view showing the structure of the apparatus for applying the molding apparatus to the extrusion process.
  • FIG. 4 is a schematic structural view of an apparatus for applying a molding apparatus to a blown film process.
  • a composite pipe/film forming device having a diamond-shaped lattice skeleton intermediate layer includes a core mold 2, a die base 1, an inner die 6, an outer die 7, and a gear 3.
  • the plug is disposed in the core mold, the gear is disposed on the outer circumference of the rotary die, and the gear and the rotary die are connected by a key; the outer side of the inner die and the inner side of the outer die are respectively provided with a fence 8; extrusion along the parison Direction, the cooling air ring is located at the rear side of the air inlet plug, the air inlet plug is disposed in the parison, the cooling air ring is disposed on the parison, and the inner and outer pressure difference is formed between the air inlet plug and the cooling air ring, thereby forming the inner and outer pressure difference Perform radial expansion.
  • the inner die and the outer die in the rotary die are concentrically arranged, and are nested along the extrusion direction of the parison according to the diameter of the diameter; the diameter of the outer die is larger than that of the inner die Diameter; the outer circumference of the inner die and the outer circumference of the outer die are respectively provided with corresponding gears, the rotation direction of the inner die is opposite to the rotation direction of the outer die, the inner die rotates in the same direction as the corresponding gear, and the outer die also has The corresponding gears rotate in the same direction.
  • the outer side of the inner die is provided with a fence, and the inner layer parison having a plurality of reverse spiral reinforcing ribs on the outer side is formed by the rotation of the inner die; the inner layer of the outer die is provided with a fence, and the outer die is rotated to form An outer layer parison having a plurality of forward spiral reinforcing ribs on the inner side; the forward spiral reinforcing ribs and the reverse spiral reinforcing ribs are stacked on each other to form an intermediate layer having a diamond-shaped lattice skeleton, and the side wall of the inner layer parison is The inner layer, the side wall of the outer layer parison as the outer layer. As shown in Fig.
  • the design of the fence structure allows the melt ring to be divided by the fence, and a plurality of spiral ribs 9 (including forward spiral ribs and reverse spiral ribs) are formed on the parison, and distributed.
  • spiral ribs 9 including forward spiral ribs and reverse spiral ribs
  • the cross-sectional shape, arrangement and number of the spiral ribs are variable, and can be changed by adjusting the shape and number of the fence and the rotational speed of the rotary die.
  • a gas flow passage is respectively disposed in the inner die and the core mold, and the gas flow passage in the inner die communicates with the gas flow passage in the core mold, and the interlayer of the double-layer hollow parison is inflated through the gas flow passage, and the high pressure
  • the gas keeps the groove in the diamond lattice skeleton firm, ensuring that the groove is intact and regular, and avoids deformation due to swelling of the melt outlet. All gas channels are buried in the inlet plug and the die, and there is no intersection, no contact, and no interference with the melt channel.
  • the flow of air in the gas channel 10 is as indicated by the arrow in FIG.
  • the melt when the rotary die is stationary, the melt is extruded in the axial direction, and a plurality of ribs are formed on the cylindrical surface of the parison, the ribs are linear, and a linear groove is formed between the rib and the rib; ⁇ , the melt is superimposed in a circular motion, the rib is spiral, and a spiral groove is formed between the rib and the rib (ie, a spiral rib is formed), and the spiral ribs are attached to each other, and the original groove is mutually Interlaced to form a plurality of diamond-shaped air pockets, regularly arranged between the inner and outer tube blanks, The diamond-shaped air pockets are stacked one on another, and finally an intermediate layer having a diamond-shaped lattice skeleton is formed, and the size of the lattice is adjusted by the rotational speed of the rotary die and the axial tensile rate.
  • the forming method of the composite pipe/film having the diamond-shaped lattice skeleton intermediate layer realized by the above device is: forming a double-layer hollow parison having a ring-shaped cross-section shape by a rotary die, and having a plurality of positive inner sides of the outer layer parison;
  • the spiral reinforcing rib has a plurality of reverse spiral reinforcing ribs on the outer side of the inner layer parison, and inflates the layers of the double-layer hollow parison, and the inner layer parison is expanded outward by the pressure difference between the inner and outer layers, and is hot-pressed with the outer layer parison Fusion, the forward spiral reinforcing ribs and the reverse spiral reinforcing ribs are stacked on each other to form an intermediate layer having a diamond-shaped lattice skeleton, thereby realizing continuous production of the composite pipe/film.
  • the formed composite pipe/film comprises an outer layer, an intermediate layer and an inner layer which are sequentially arranged from the outside to the inside.
  • the intermediate layer is a diamond-shaped lattice skeleton 11
  • the diamond-shaped lattice skeleton is composed of a plurality of positive directions.
  • the spiral rib and the plurality of reverse spiral ribs are stacked on each other, and the plurality of forward spiral ribs are located on the inner side of the outer layer, and the plurality of reverse spiral ribs are located on the outer side of the inner side.
  • the molding apparatus in Embodiment 1 is applied to a squeeze tube process, as shown in FIG. 3, the apparatus includes a plasticized transport unit, an extrusion unit, and a sizing unit sequentially connected thereto;
  • the plasticizing transport unit is a single-screw extruder 12
  • the extrusion unit is a forming device of a composite pipe/film having a diamond-shaped lattice skeleton intermediate layer
  • the sizing unit includes a sizing device 13 and a traction device 14, single-screw extrusion
  • the outlet, sizing device and traction device can all be equipped with the corresponding equipment in the traditional pipe extrusion process.
  • the molding apparatus in Embodiment 1 is applied to a blown film process, as shown in FIG. 4, the apparatus includes a plasticized transport unit, an extrusion unit, and a sizing unit sequentially connected thereto;
  • the plasticizing transport unit is a single-screw extruder 12
  • the extruding unit is a forming device of a composite pipe/film having a diamond-shaped lattice skeleton intermediate layer
  • the sizing unit comprises a circular bubble blister 15, a bubble cage 16
  • the herringbone plate 17 and the winding device 18, the circular bubble blister and the bubble cage act as a sizing, the herringbone plate and the winding device act as a sling, and the plasticized transport unit and the sizing unit are both conventional.
  • the corresponding equipment in the blown film process can be used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

本发明公开一种具有菱形格子骨架中间层的复合管/膜及成型方法和装置，复合管/膜包括由外至内依次设置的外层、中间层和内层，中间层为菱形格子骨架。其成型方法是利用旋转口模成型截面形状为环形的双层中空型坯，外层型坯内侧和内层型坯外侧分别具有多根螺旋加强筋，内层型与外层型坯热压熔合后螺旋加强筋堆砌贴合，形成具有菱形格子骨架的中间层。其成型装置包括芯模、模头基体、内口模、外口模、齿轮和进气塞，内口模和外口模组成的旋转口模设于芯模与模头基体之间，进气塞设于芯模内，齿轮设于旋转口模外周，内口模外侧和外口模内侧分别设有栅栏。本发明制得的复合管/膜相比传统产品，其重量明显降低，同时还可实现自增强和降噪音的效果。

Description

具有菱形格子骨架中间层的复合管 /膜及成型方法和装置 技术领域
[0001] 本发明涉及聚合物连续成型技术领域， 特别涉及一种具有菱形格子骨架中间层 的复合管 /膜及成型方法和装置。
背景技术
[0002] 聚合物材料以其优异的耐腐蚀性、 长期稳定性、 安装维修方便等优点， 在挤管 、 吹膜领域中占有重要地位， 广泛应用于燃气输送、 供水、 农业灌溉等领域， 发展迅猛。
[0003] 聚合物管材是一类应用广泛的型材， 但传统管材周向强度较低， 在作为承压管 材吋， 为了满足使用要求， 需增厚管材壁， 这样既增加其重量， 又浪费材料， 也使得管材的冷却定型困难。
[0004] 针对该问题， 国内外已进行了大量研究， 如通过改进聚合方法， 合成高性能聚 合物管专用树脂， 或建立聚合物管加工新技术， 在加工过程中调控聚合物结构 实现其高性能化， 如口模拉伸、 振动挤出、 旋转挤出等。 到目前为止， 国内外 学者就管材的双向增强技术进行了广泛的研究， 四川大学申幵智教授课题组自 行设计了带有周向剪切元件和能产生轴向拉伸的复合应力场挤出口模， 制备出 双向自增强的聚烯烃管材， 这种挤出装置的突出优点是可以根据实际生产需要 ， 调整口模组合元件尺寸， 生产出不同口径的双向增强管材， 改传统的芯棒旋 转为芯套旋转， 但该装置结构复杂， 旋转芯套拆装不便。 四川大学王琪教授课 题组自行研制了新型旋转挤出装置， 通过芯棒与口模同吋反向旋转挤出制备聚 乙烯 （PE) 管， 结果表明， 在口模与芯棒反向旋转挤出过程中， 管道内外壁除 受到轴向应力作用外， 还受到芯棒和口模旋转所施加的环向应力， 其合力方向 不再是沿管道轴向而是与其有一定的角度， 因此， 分子链的取向方向和以此链 为初级成核点形成的串晶偏离轴向， 增强了管道抵抗裂纹增长的能力， 但该装 置结构复杂， 反向旋转挤出对管材自增强的效果并不明显。
[0005] 同吋， 针对聚合物管材密度较小， 容易受到震动而产生噪声的缺点， 一些企业 通过加入特殊材料来调整管材的密度和微观结构， 幵发出了新型的降低噪声的 排水管， 即利用了通过降低排水吋引发的管材的振动， 同吋密度较高的芯层具 有更好的隔声性能的原理， 从而降低了噪声的原理。 目前常见的主要有螺旋管 、 复合管、 夹芯管以及上述降噪方式进行复合制备的管材等。 内螺旋管由若干 条凸起三角形肋条， 沿内壁均匀地呈螺旋线分布， 螺旋线与管轴线呈一定的夹 角 （理论上可推导出， 螺旋线与管轴线保持这种夹角吋， 排水管具有最佳的排 水能力和通气效果） 。 水流进入立管后， 在螺旋肋的导流作用下， 沿内壁形成 较为稳定而密实的水流膜旋流， 旋转下落。 由于水流紧贴管壁， 避免了横向水 流进入立管后， 对立管壁的反复冲撞， 由此大大减小了水流对排水立管的撞击 噪声。 同吋由于水流沿立管壁旋转下落， 管中形成了一个畅通的漩涡空气柱， 减少了管道内的压力波动， 避免了横向水流被冲撞后散乱落下与空气相遇形成 的管道噪声和混杂夹带气泡产生的噪声。 但螺旋管加工工艺复杂， 实际生产与 理论推导相差甚远。 另外， 复合管、 夹芯管通过添加密度较高的材料， 或设置 密度较高的芯层， 这本身就增加了聚合物管材的自重。
技术问题
[0006] 本发明的目的在于克服现有技术的不足， 提供一种聚合物材料轻化， 可实现自 增强、 降噪音效果的具有菱形格子骨架中间层的复合管 /膜。
[0007] 本发明的另一目的在于提供一种成型上述具有菱形格子骨架中间层的复合管 / 膜的方法。
[0008] 本发明的又一目的在于提供一种成型上述具有菱形格子骨架中间层的复合管 / 膜的装置。
问题的解决方案
技术解决方案
[0009] 本发明的技术方案为： 一种具有菱形格子骨架中间层的复合管 /膜， 包括由外 至内依次设置的外层、 中间层和内层， 中间层为菱形格子骨架。
[0010] 其中， 所述菱形格子骨架由多根正向螺旋加强筋和多根反向螺旋加强筋彼此堆 砌贴合形成， 多根正向螺旋加强筋位于外层的内侧， 多根反向螺旋加强筋位于 [0011] 上述具有菱形格子骨架中间层的复合管 /膜的成型方法为： 利用旋转口模成型 截面形状为环形的双层中空型坯， 外层型坯内侧具有多根正向螺旋加强筋， 内 层型坯外侧具有多根反向螺旋加强筋， 并向双层中空型坯的层间充气， 内层型 坯受到内外压差而往外扩胀， 与外层型坯热压熔合， 正向螺旋加强筋和反向螺 旋加强筋彼此堆砌贴合， 最终形成具有菱形格子骨架的中间层， 实现复合管 /膜 的连续式生产。
[0012] 上述具有菱形格子骨架中间层的复合管 /膜的成型装置， 包括芯模、 模头基体 、 内口模、 外口模、 齿轮和进气塞， 芯模和模头基体组成模头， 内口模和外口 模组成旋转口模； 旋转口模设于芯模与模头基体之间， 进气塞设于芯模内， 齿 轮设于旋转口模外周， 且齿轮与旋转口模之间采用键连接； 内口模的外侧和外 口模的内侧分别设有栅栏。
[0013] 所述旋转口模中， 内口模和外口模同心设置， 且按照直径尺寸由大到小沿型坯 的挤出方向套叠。
[0014] 所述外口模的直径大于内口模的直径。
[0015] 所述内口模的外周和外口模的外周分别设置对应的齿轮， 内口模的旋转方向与 外口模的旋转方向相反。
[0016] 其中， 内口模的外侧设有栅栏， 通过内口模的旋转， 成型外侧具有多根反向螺 旋加强筋的内层型坯； 外口模的内层设有栅栏， 通过外口模的旋转， 成型内侧 具有多根正向螺旋加强筋的外层型坯； 正向螺旋加强筋和反向螺旋加强筋彼此 堆砌贴合后， 形成具有菱形格子骨架的中间层， 而内层型坯的侧壁作为内层， 外层型坯的侧壁作为外层。 栅栏结构的设计， 使熔体环流经栅栏后被分割， 在 型坯上形成多条螺旋加强筋， 并分布在环形型坯一侧， 螺旋加强筋的截面形状 、 排列方式和数量是可变的， 通过调整栅栏的形状、 数量以及旋转口模的旋转 速度， 即可进行改变。
[0017] 所述内口模和芯模中分别设有气体流道， 且内口模中的气体流道与芯模中的气 体流道相连通。 通过气体流道向双层中空型坯的层间充气， 高压气体可使菱形 格子骨架中的沟槽保持坚挺， 保证沟槽完好而规整， 避免因熔体出口胀大而挤 压变形。 [0018] 所述成型装置还包括冷却风环， 沿型坯的挤出方向， 冷却风环位于进气塞的后 侧， 进气塞设于型坯内， 冷却风环设于型坯外， 进气塞和冷却风环之间形成内 外压力差， 从而对型坯进行径向扩张。
[0019] 根据实际生产的需要， 沿型坯的挤出方向， 所述冷却风环的后侧还可依次设有 定径装置和牵引装置等辅助装置， 对型坯进行拉伸、 牵引、 定径等， 实现连续 制备复合管 /膜。
发明的有益效果
有益效果
[0020] 本发明相对于现有技术， 具有以下有益效果：
[0021] 1、 本发明制得的具有菱形格子骨架中间层的复合管或复合膜， 由于中间层结 构的设计， 使成型后复合管或复合膜相比传统产品， 其重量明显降低， 同吋还 可实现自增强和降噪音的效果。
[0022] 2、 利用本发明的成型方法及装置， 可连续成型平均密度较低的复合管或复合 膜， 其装置结构简单， 维护方便， 可适用多种规格产品的制造。 所制得的产品 不仅重量明显降低， 还可实现聚合物双向自增强， 轴向强度显著提升； 由于采 用压缩空气填充复合管或复合膜， 因此可以起到减小噪音的效果。
对附图的简要说明
附图说明
[0023] 图 1为本复合管 /膜的菱形格子骨架的结构示意图。
[0024] 图 2为本成型装置的结构示意图。
[0025] 图 3为本成型装置应用于挤管工艺吋的设备结构示意图。
[0026] 图 4为本成型装置应用于吹膜工艺吋的设备结构示意图。
实施该发明的最佳实施例
本发明的最佳实施方式
[0027] 下面结合实施例， 对本发明作进一步的详细说明， 但本发明的实施方式不限于 此。
[0028] 实施例 1 [0029] 本实施例一种具有菱形格子骨架中间层的复合管 /膜的成型装置， 如图 2所示， 包括芯模 2、 模头基体 1、 内口模 6、 外口模 7、 齿轮 3、 进气塞 4和冷却风环 5， 芯 模和模头基体组成模头， 内口模和外口模组成旋转口模； 旋转口模设于芯模与 模头基体之间， 进气塞设于芯模内， 齿轮设于旋转口模外周， 且齿轮与旋转口 模之间采用键连接； 内口模的外侧和外口模的内侧分别设有栅栏 8; 沿型坯的挤 出方向， 冷却风环位于进气塞的后侧， 进气塞设于型坯内， 冷却风环设于型坯 夕卜， 进气塞和冷却风环之间形成内外压力差， 从而对型坯进行径向扩张。
[0030] 上述结构中， 旋转口模中的内口模和外口模同心设置， 且按照直径尺寸由大到 小沿型坯的挤出方向套叠； 外口模的直径大于内口模的直径； 内口模的外周和 外口模的外周分别设置对应的齿轮， 内口模的旋转方向与外口模的旋转方向相 反， 内口模与其对应的齿轮同向旋转， 外口模也与其对应的齿轮同向旋转。 内 口模的外侧设有栅栏， 通过内口模的旋转， 成型外侧具有多根反向螺旋加强筋 的内层型坯； 外口模的内层设有栅栏， 通过外口模的旋转， 成型内侧具有多根 正向螺旋加强筋的外层型坯； 正向螺旋加强筋和反向螺旋加强筋彼此堆砌贴合 后， 形成具有菱形格子骨架的中间层， 而内层型坯的侧壁作为内层， 外层型坯 的侧壁作为外层。 如图 1所示， 栅栏结构的设计， 使熔体环流经栅栏后被分割， 在型坯上形成多条螺旋加强筋 9 (即包括正向螺旋加强筋和反向螺旋加强筋） ， 并分布在环形型坯一侧， 螺旋加强筋的截面形状、 排列方式和数量是可变的， 通过调整栅栏的形状、 数量以及旋转口模的旋转速度， 即可进行改变。 内口模 和芯模中分别设有气体流道， 且内口模中的气体流道与芯模中的气体流道相连 通， 通过气体流道向双层中空型坯的层间充气， 高压气体可使菱形格子骨架中 的沟槽保持坚挺， 保证沟槽完好而规整， 避免因熔体出口胀大而挤压变形。 将 所有的气体流道埋覆在进气塞和模头内， 与熔体流道无交叉、 无接触， 互不干 扰， 气体流道 10中空气的流向如图 2中的箭头所示。 其中， 当旋转口模静止吋， 熔体沿轴向挤出， 在型坯的圆柱面上形成多条筋， 筋呈直线型， 筋与筋之间形 成直线型沟槽； 当旋转口模旋转吋， 熔体迭加环向旋转运动， 筋呈螺旋线型， 筋与筋之间形成螺旋线型沟槽 （即形成螺旋加强筋） ， 螺旋加强筋彼此贴合， 原来完整的沟槽， 相互交错形成若干菱形气穴， 规则排布在内外层管坯之间， 菱形气穴相互堆砌， 最终形成具有菱形格子骨架的中间层， 格子的大小通过旋 转口模的转速和轴向拉伸速率来调整。
[0031] 通过上述装置实现的具有菱形格子骨架中间层的复合管 /膜的成型方法为： 利 用旋转口模成型截面形状为环形的双层中空型坯， 外层型坯内侧具有多根正向 螺旋加强筋， 内层型坯外侧具有多根反向螺旋加强筋， 并向双层中空型坯的层 间充气， 内层型坯受到内外压差而往外扩胀， 与外层型坯热压熔合， 正向螺旋 加强筋和反向螺旋加强筋彼此堆砌贴合， 最终形成具有菱形格子骨架的中间层 ， 实现复合管 /膜的连续式生产。
[0032] 成型后的复合管 /膜， 包括由外至内依次设置的外层、 中间层和内层， 如图 1所 示， 中间层为菱形格子骨架 11， 菱形格子骨架由多根正向螺旋加强筋和多根反 向螺旋加强筋彼此堆砌贴合形成， 多根正向螺旋加强筋位于外层的内侧， 多根 反向螺旋加强筋位于内侧的外侧。
[0033] 实施例 2
[0034] 本实施例是将实施例 1中的成型装置应用于挤管工艺， 如图 3所示， 其设备包括 依次连接的塑化输运单元、 挤出单元和定径牵引单元； 其中， 塑化输运单元为 单螺杆挤出机 12， 挤出单元为本具有菱形格子骨架中间层的复合管 /膜的成型装 置， 定径牵引单元包括定径装置 13和牵引装置 14， 单螺杆挤出机、 定径装置和 牵引装置均采用传统挤管工艺中相应的设备即可。
[0035] 实施例 3
[0036] 本实施例是将实施例 1中的成型装置应用于吹膜工艺， 如图 4所示， 其设备包括 依次连接的塑化输运单元、 挤出单元和定径牵引单元； 其中， 塑化输运单元为 单螺杆挤出机 12， 挤出单元为本具有菱形格子骨架中间层的复合管 /膜的成型装 置， 定径牵引单元包括圆形膜泡罩 15、 膜泡笼 16、 人字板 17和收卷装置 18， 圆 形膜泡罩和膜泡笼起定径作用， 人字板和收卷装置起牵弓 I作用， 塑化输运单元 和定径牵引单元均采用传统吹膜工艺中相应的设备即可。
[0037] 如上所述， 便可较好地实现本发明， 上述实施例仅为本发明的较佳实施例， 并 非用来限定本发明的实施范围； 即凡依本发明内容所作的均等变化与修饰， 都 为本发明权利要求所要求保护的范围所涵盖。

Claims

权利要求书
[权利要求 1] 具有菱形格子骨架中间层的复合管 /膜， 其特征在于， 包括由外至内 依次设置的外层、 中间层和内层， 中间层为菱形格子骨架。
[权利要求 2] 根据权利要求 1所述具有菱形格子骨架中间层的复合管 /膜， 其特征在 于， 所述菱形格子骨架由多根正向螺旋加强筋和多根反向螺旋加强筋 彼此堆砌贴合形成， 多根正向螺旋加强筋位于外层的内侧， 多根反向 螺旋加强筋位于内侧的外侧。
[权利要求 3] 具有菱形格子骨架中间层的复合管 /膜的成型方法， 其特征在于， 利 用旋转口模成型截面形状为环形的双层中空型坯， 外层型坯内侧具有 多根正向螺旋加强筋， 内层型坯外侧具有多根反向螺旋加强筋， 并向 双层中空型坯的层间充气， 内层型坯受到内外压差而往外扩胀， 与外 层型坯热压熔合， 正向螺旋加强筋和反向螺旋加强筋彼此堆砌贴合， 最终形成具有菱形格子骨架的中间层， 实现复合管 /膜的连续式生产
[权利要求 4] 具有菱形格子骨架中间层的复合管 /膜的成型装置， 其特征在于， 包 括芯模、 模头基体、 内口模、 外口模、 齿轮和进气塞， 芯模和模头基 体组成模头， 内口模和外口模组成旋转口模； 旋转口模设于芯模与模 头基体之间， 进气塞设于芯模内， 齿轮设于旋转口模外周， 且齿轮与 旋转口模之间采用键连接； 内口模的外侧和外口模的内侧分别设有栅 栏。
[权利要求 5] 根据权利要求 4所述具有菱形格子骨架中间层的复合管 /膜的成型装置
， 其特征在于， 所述旋转口模中， 内口模和外口模同心设置， 且按照 直径尺寸由大到小沿型坯的挤出方向套叠。
[权利要求 6] 根据权利要求 5所述具有菱形格子骨架中间层的复合管 /膜的成型装置
， 其特征在于， 所述外口模的直径大于内口模的直径。
[权利要求 7] 根据权利要求 5所述具有菱形格子骨架中间层的复合管 /膜的成型装置
， 其特征在于， 所述内口模的外周和外口模的外周分别设置对应的齿 轮， 内口模的旋转方向与外口模的旋转方向相反。
[权利要求 8] 根据权利要求 4所述具有菱形格子骨架中间层的复合管 /膜的成型装置
， 其特征在于， 所述内口模和芯模中分别设有气体流道， 且内口模中 的气体流道与芯模中的气体流道相连通。
[权利要求 9] 根据权利要求 4所述具有菱形格子骨架中间层的复合管 /膜的成型装置
， 其特征在于， 所述成型装置还包括冷却风环， 沿型坯的挤出方向， 冷却风环位于进气塞的后侧， 进气塞设于型坯内， 冷却风环设于型坯 夕卜， 进气塞和冷却风环之间形成内外压力差， 从而对型坯进行径向扩 张。
[权利要求 10] 根据权利要求 8所述具有菱形格子骨架中间层的复合管 /膜的成型装置 ， 其特征在于， 沿型坯的挤出方向， 所述冷却风环的后侧还依次设有 定径装置和牵引装置。
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CN105082550B (zh) * 2015-08-12 2017-10-20 华南理工大学 具有菱形格子骨架中间层的复合管/膜及成型方法和装置
CN106493965B (zh) * 2016-10-21 2018-08-03 北京化工大学 一种连续拉伸增强复合塑料管材的装置及方法
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2442835Y (zh) * 2000-08-15 2001-08-15 张守彬 多层高分子防水卷材
CN201014070Y (zh) * 2007-02-02 2008-01-30 叶建伟 嵌夹金属层的塑胶复合管
CN101539223A (zh) * 2008-11-28 2009-09-23 潍坊中云科研有限公司 双壁塑料管道、双壁塑料管道的制造方法及挤出模具
JP4440086B2 (ja) * 2004-11-26 2010-03-24 東海旅客鉄道株式会社 外装部材、外表面冷却構造、及び外表面冷却方法
CN102829255A (zh) * 2011-06-15 2012-12-19 朱伟全 菱形网状夹层热水管
CN105082550A (zh) * 2015-08-12 2015-11-25 华南理工大学 具有菱形格子骨架中间层的复合管/膜及成型方法和装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5926451B2 (ja) * 1976-06-04 1984-06-27 文雄 相田 力骨付プラスチックフイルムの製造方法および同フイルム製造用ダイ
JP3647594B2 (ja) * 1997-03-26 2005-05-11 大倉工業株式会社 補強用繊状部を有するフィルム、又は、通気性フィルムの製造方法
CN1220579C (zh) * 2002-10-04 2005-09-28 青岛绿华塑料机械有限公司 双平壁螺旋中空结构壁管及其一次挤出生产线
CN102189662A (zh) * 2010-03-20 2011-09-21 永高股份有限公司 中空消音螺旋管挤出模具
CN103568263A (zh) * 2012-08-11 2014-02-12 宁波康润机械科技有限公司 双平壁螺旋中空结构壁管的制造装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2442835Y (zh) * 2000-08-15 2001-08-15 张守彬 多层高分子防水卷材
JP4440086B2 (ja) * 2004-11-26 2010-03-24 東海旅客鉄道株式会社 外装部材、外表面冷却構造、及び外表面冷却方法
CN201014070Y (zh) * 2007-02-02 2008-01-30 叶建伟 嵌夹金属层的塑胶复合管
CN101539223A (zh) * 2008-11-28 2009-09-23 潍坊中云科研有限公司 双壁塑料管道、双壁塑料管道的制造方法及挤出模具
CN102829255A (zh) * 2011-06-15 2012-12-19 朱伟全 菱形网状夹层热水管
CN105082550A (zh) * 2015-08-12 2015-11-25 华南理工大学 具有菱形格子骨架中间层的复合管/膜及成型方法和装置

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