WO2024021146A1 - 一种混沌单螺杆挤出注射装置 - Google Patents

一种混沌单螺杆挤出注射装置 Download PDF

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Publication number
WO2024021146A1
WO2024021146A1 PCT/CN2022/110036 CN2022110036W WO2024021146A1 WO 2024021146 A1 WO2024021146 A1 WO 2024021146A1 CN 2022110036 W CN2022110036 W CN 2022110036W WO 2024021146 A1 WO2024021146 A1 WO 2024021146A1
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Prior art keywords
screw
disturbing
chaotic
injection device
disturbing member
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PCT/CN2022/110036
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English (en)
French (fr)
Inventor
徐百平
邱康
喻慧文
肖书平
谈灵操
黄嘉荣
徐文华
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Wuyi University Fujian
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Wuyi University Fujian
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Priority to US18/994,408 priority Critical patent/US20260008213A1/en
Publication of WO2024021146A1 publication Critical patent/WO2024021146A1/zh
Anticipated expiration legal-status Critical
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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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/581—Devices for influencing the material flow, e.g. "torpedo constructions" or mixing devices
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/60—Screws

Definitions

  • Embodiments of the present application relate to, but are not limited to, the field of extrusion injection devices, and particularly relate to a chaotic single-screw extrusion injection device.
  • the single-screw mechanism has the advantages of simple structure, convenient operation and maintenance, and the ability to establish stable extrusion pressure. It is widely used in extrusion molding and injection molding processes.
  • the single-screw mechanism is mainly based on the friction drag mechanism. From the normal cross-section of the screw edge, the screw groove structure is symmetrical after unfolding and can be simplified into a square groove upper cover dragging physical model for solid transportation, melting, mixing and extrusion.
  • the pressure building and pressure building are all completed within such a physical model, and the transportation mechanism is mainly friction drag transportation. Due to the symmetry of the flow channel, the melting, plasticizing and mixing of the extrusion process are inefficient, and the energy consumption during the processing is huge.
  • the engineering community In order to improve the melting and plasticizing efficiency and improve the mixing effect, the engineering community currently generally adopts various forms such as separation screws, barrier screws, pin screws, etc., mainly by separating the solid bed and the molten pool to enhance heat transfer, and through the cutting of the fluid.
  • Split flow to strengthen mixing and mixing but the size of the strengthening components is limited and the effect is not significant enough.
  • the strengthening mechanism is still limited to the classic laminar flow mixing; these strengthening measures generally have weak processing elasticity, solid materials are easy to block the screw channel, and there is a dead zone in the flow channel. It is easy to accumulate defects such as material.
  • the embodiment of the present application provides a chaotic single-screw extrusion and injection device, which can generate a longitudinal extrusion and stretching flow field, superimpose the circulation effect of the cross-section of the screw groove, and induce the chaotic mixing and strengthening effect.
  • a chaotic single-screw extrusion injection device including:
  • the screw is arranged in the barrel, the outer surface of the screw is provided with a helical edge, a first disturbing part and a second disturbing part, the helical edge spirally extends along the axial direction of the screw, so One end of the first disturbing member is connected to the thrust surface of the helical edge, the other end of the first disturbing member extends toward the dragging surface of the helical edge, and one end of the second disturbing member is connected to the helical edge. The other end of the second disturbing member extends toward the thrust surface of the spiral edge.
  • first disturbing member and the second disturbing member are curved conical structures.
  • first disturbing member and the second disturbing member form a gap between the spiral edge and the inner wall of the barrel for producing a squeezing and stretching effect.
  • a spiral groove is formed between two adjacent spiral edges.
  • a baffle is provided in the spiral groove, and the baffle forms an extending direction of the spiral.
  • center line eccentric distance of the first disturbing member is less than or equal to the depth of the screw groove
  • center line eccentric distance of the second disturbing member is less than or equal to the depth of the screw groove
  • H is the depth of the screw groove, a is the weight parameter, and the value range of a is 0.01 to 1.
  • the range of the central angle corresponding to the first disturbing element is ⁇ /10 ⁇ 1 ⁇ 2 ⁇ , ⁇ 1 is the central angle corresponding to the first disturbing element; the range of the central angle corresponding to the second disturbing element is ⁇ /10 ⁇ 2 ⁇ 2 ⁇ , ⁇ 2 is the central angle corresponding to the second disturbing element.
  • the height of the baffle is less than or equal to the depth of the spiral groove.
  • the center line of the baffle is eccentrically arranged with the axis of the screw, and the eccentric distance of the baffle is less than or equal to the depth of the screw groove.
  • the above-mentioned chaotic single-screw extrusion and injection device has at least the following beneficial effects: during the injection molding process, the screw produces an axial forward and backward effect, and the chaotic single-screw extrusion and injection device can generate a longitudinal extrusion and stretching flow field, and the superimposed screw groove horizontal
  • the transverse circulation effect within the cross-section induces chaotic mixing and strengthening effects, which not only ensures the smooth flow path, but also effectively enhances the melting, plasticizing and mixing efficiency of the material; the first and second disturbing parts are located within the axial cross-section of the screw. It produces a wedge-shaped pressurizing and strengthening effect, forming a strengthened melting and mixing mechanism, and more effectively improves the melting and plasticizing efficiency of the screw.
  • Figure 1 is a structural diagram of a chaotic single-screw extrusion injection device provided by an embodiment of the present application
  • Figure 2 is a structural diagram of a screw provided by an embodiment of the present application.
  • Figure 3 is a structural diagram of the geometric configuration of the first disturbing member and the second disturbing member in the cross section of the screw;
  • Figure 4 is a structural diagram of the geometric configuration of the baffle in the cross section of the screw.
  • the embodiment of the present application provides a chaotic single-screw extrusion injection device, which includes a barrel and a screw.
  • the screw is arranged in the barrel.
  • the outer surface of the screw is provided with a spiral edge, a first disturbing member and a second disturbing member.
  • the rib extends spirally along the axial direction of the screw.
  • One end of the first disturbing member is connected to the thrust surface of the screw.
  • the other end of the first disturbing member extends toward the dragging surface of the screw.
  • One end of the second disturbing member is connected to the thrust surface of the screw.
  • the drag surface is connected, and the other end of the second disturbance element extends toward the thrust surface of the spiral; it can generate a longitudinal flow field, superimpose the transverse circulation effect in the cross section of the spiral groove, and induce chaotic mixing and strengthening effects, while ensuring a smooth flow path. , effectively enhancing the melting, plasticizing and mixing efficiency of the material; during the injection molding process, the screw produces an axial forward and backward effect, and the first and second disturbing parts produce a wedge-shaped pressurization and strengthening effect in the axial section of the screw. , forming a strengthened melting and mixing mechanism to more effectively improve the melting and plasticizing efficiency of the screw.
  • the chaotic single screw extrusion injection device includes a barrel 100 and a screw 200 .
  • the screw 200 is disposed in the barrel 100.
  • the outer surface of the screw 200 is provided with a helical edge 210, a first disturbing member 220 and a second disturbing member 230.
  • the helical edge 210 spirally extends along the axial direction of the screw 200.
  • the first disturbing member One end of the member 220 is connected to the thrust surface 201 of the helix 210, the other end of the first disturbance member 220 extends in the direction of the drag surface 202 of the helix 210, and one end of the second disturbance member 230 is connected to the drag surface 202 of the helix 210.
  • the other end of the second disturbing member 230 extends toward the thrust surface 201 of the spiral edge 210 .
  • the left and right side walls of the spiral edge 210 respectively form a drag surface 202 and a thrust surface 201 according to the stress of the conveyed material.
  • a material conveying channel 140 is formed between the outer surface of the screw 200 and the inner surface of the barrel 100 .
  • the upper side of one end of the barrel 100 is provided with a feed port 101, and the other end is provided with a discharge port 102.
  • the barrel 100 is sequentially provided with a conveying section 110, a melting section 120 and a metering section from the feed port 101 to the discharge port 102.
  • the metering section 130 includes a mixing section and a homogenizing section.
  • the screw 200 produces an axial forward and backward effect
  • the chaotic single-screw extrusion injection device can generate a longitudinal flow field, superimpose the transverse circulation effect in the cross section of the screw groove, and induce the chaotic mixing enhancement effect.
  • the melting, plasticizing and mixing efficiency of the material is effectively enhanced; the first disturbing member 220 and the second disturbing member 230 produce a wedge-shaped pressurizing and strengthening effect in the axial section of the screw 200, forming a strengthening effect.
  • the melting and mixing mechanism more effectively improves the melting and plasticizing efficiency of the screw 200.
  • the outermost edge of the helix 210 mates tangentially with the inner surface of the barrel 100 .
  • the first disturbing member 220 and the second disturbing member 230 are curved conical structures. This enables the chaotic single-screw extrusion and injection device to generate a zigzag longitudinal flow field, superimpose the transverse circulation effect in the cross-section of the screw groove, and induce chaotic mixing enhancement.
  • the first disturbing member 220 and the second disturbing member 230 form a gap between the spiral edge 210 and the inner wall of the barrel 100 for generating a squeezing and stretching effect.
  • the gap exerts a local squeezing and stretching effect on the material.
  • a spiral groove is formed between two adjacent spiral edges 210 .
  • the first disturbance member 220 and the second disturbance member 230 are periodically arranged starting from the compression section of the screw 200 .
  • the centerline eccentric distance of the first disturbing member 220 is less than or equal to the depth of the screw groove, and the centerline eccentric distance of the second disturbing member 230 is less than or equal to the depth of the screw groove. That is, the centerline eccentric distance of the first disturbing member 220 is e1, and the value range of e1 is 0 to H; the centerline eccentric distance of the second disturbing member 230 is e2, and the value range of e2 is 0 to H.
  • the range of the central angle corresponding to the first disturbing member 220 is ⁇ /10 ⁇ 1 ⁇ 2 ⁇ , ⁇ 1 is the central angle corresponding to the first disturbing member 220; the range of the central angle corresponding to the second disturbing member 230 It is ⁇ /10 ⁇ 2 ⁇ 2 ⁇ , and ⁇ 2 is the central angle corresponding to the second disturbing member 230.
  • one vertex of the conical bottom edge is connected to the center of the screw 200 to form an edge
  • the other vertex of the conical bottom edge is Another side is connected to the center of the circle of the screw 200, and the two sides form a central angle.
  • ⁇ AOB is the central angle ⁇ 1 corresponding to the first disturbing element 220 .
  • both the first perturbation element 220 and the second perturbation element 230 adopt a multi-leaf structure.
  • the number of leaves is N
  • the phase difference of the perturbation elements of the multi-leaf structure is less than or equal to 2 ⁇ /N.
  • the lead of the first disturbing element 220 and the lead of the second disturbing element 230 may be the same as the lead of the spiral edge 210 , or may be different from the lead of the spiral edge 210 .
  • a baffle 240 is provided in the screw channel, and the baffle 240 forms an extending direction of the spiral.
  • the baffle 240 has a protruding structure in the cross-section of the screw 200; preferably, the protruding structure is a rectangular or similar rectangular structure.
  • the baffle 240 can be single-leaf or multi-leaf.
  • the multi-leaf baffle 240 is arranged in a peak-valley staggered pattern to maximize the disturbance effect and enhance the melting and kneading effect.
  • the baffles 240 are arranged periodically starting from the compression section of the screw 200 .
  • the height of the baffle 240 is less than or equal to the depth of the channel.
  • the height of the i-th baffle 240 is hbi , and the value range of hbi is 0 to H.
  • the height hb 1 of the first baffle 240 and the height hb 2 of the second baffle 240 both satisfy the value range of 0 to H.
  • the center line of the baffle 240 is arranged eccentrically to the axis of the screw 200 , and the eccentric distance of the baffle 240 is less than or equal to the depth of the screw groove.
  • baffles 240 There are multiple baffles 240.
  • the eccentric distance of the i-th baffle 240 is ebi , and the value of ebi ranges from 0 to H.
  • the eccentric distance eb 1 of the first baffle 240 and the eccentric distance eb 2 of the second baffle 240 both satisfy the value range of 0 to H.
  • the lead of the baffle 240 may be the same as the lead of the helical edge 210 , or may be different from the lead of the helical edge 210 .
  • the lead of the baffle 240 is Lb
  • the structure of the baffle 240 extends in the screw groove at a certain helical angle with the helical edge 210 of the screw 200.
  • the structure is streamlined, and the height changes periodically.
  • the multi-leaf baffles 240 are arranged in a staggered peak-valley arrangement to achieve flow control of the fluid.
  • the cutting shunting effect and the introduction of homoclinic orbital perturbation in the screw channel trigger chaotic mixing, providing another chaotic mixing mechanism for the fluid in the screw channel, further enhancing the melting and mixing efficiency.
  • the streamlined first disturbing member 220 and the second disturbing member 230, as well as the streamlined baffle 240 without sudden changes, are formed by spiral sweep deviating from the axis of the main screw 200, thereby introducing a deviating asymmetric effect. , which can effectively reduce the stagnation effect of the fluid and improve the self-cleaning ability of the screw channel.
  • Certain embodiments of the present application provide a plasticizing and extruding method that uses the above chaotic single-screw extrusion and injection device.
  • the material enters the barrel 100 from the feed port 101, and the screw 200 rotates around its own axis; under the action of friction, the material moves along the screw groove in the material flow channel toward the discharge port 102 and is continuously compacted, passing through the conveying section 110, entering the melting section 120.
  • the material entering the melting section 120 continues to move forward along the screw channel under the rotation of the screw 200, and is further compacted to form a solid bed, which is partially melted under the action of external heating and frictional heat generation; the solid bed formed by the material moves longitudinally along the screw channel. It is continuously pushed forward, and the melting process is accelerated by the synergistic effect of the first disturbing member 220, the second disturbing member 230 and the baffle 240. Specifically, the advancing material is extruded and changed by the first disturbing member 220 and the second disturbing member 230, inducing chaotic mixing. At the same time, a wedge-shaped pressurizing effect is generated along the axial direction of the screw 200, which accelerates the migration of the melt film, effectively The melting efficiency is greatly improved.
  • the height of the baffles 240 changes periodically, and the multi-leaf baffles 240 are arranged in a staggered peak-valley arrangement to achieve cutting and shunting of the fluid.
  • homoclinic orbital perturbation is introduced in the screw channel to trigger chaotic mixing, providing Another chaotic mixing mechanism of the fluid in the screw groove provides a dispersion melting mechanism and further enhances the melting efficiency.
  • the molten material continues to be transported forward under the action of friction and enters the metering section 130.
  • the molten material entering the metering section 130 continues to move forward under the action of friction.
  • the melt is affected by the first disturbance member 220, the second disturbance member 230 and the baffle 240. On the one hand, it produces a local compression and stretching effect through the curved conical disturbance structure, and on the other hand, it produces a zigzag longitudinal flow field, superimposing the groove.
  • the transverse circulation in the cross-section induces chaotic mixing enhancement, which not only ensures the smooth flow path, but also effectively enhances the mixing efficiency of the material; on the other hand, the existence of the conical disturbance structure, when the injection molding process, the screw
  • a wedge-shaped pressurization and strengthening tensile field effect is generated in the axial section of the screw 200, forming another mechanism to strengthen melting and mixing, and more effectively improve the mixing and mixing efficiency of the screw 200.
  • the melting and plasticizing process of the material is further completed, and the molten and plasticized melt is continuously transported into the cavity formed between the screw 200 and the barrel 100 as the screw 200 moves backward.
  • Plasticizing injection is a cyclical process. When the injection action is completed, the above process can be repeated.

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

Abstract

一种混沌单螺杆挤出注射装置，包括机筒（100）和螺杆（200），螺杆（200）设置于机筒（100）内，螺杆（200）的外表面设有螺棱（210）、第一扰动件（220）和第二扰动件（230），螺棱（210）沿螺杆（200）的轴向方向螺旋延伸，第一扰动件（220）的一端与螺棱（210）的推力面（201）连接，第一扰动件（220）的另一端向螺棱（210）的拖曳面（202）方向延伸，第二扰动件（230）的一端与螺棱（210）的拖曳面（202）连接，第二扰动件（230）的另一端向螺棱（210）的推力面（201）方向延伸；能够产生纵向挤压拉伸流场，叠加螺槽横截面内横向环流作用，诱发混沌混合强化作用，在保证了流道顺畅的同时，有效强化了物料的熔融塑化和混合混炼效率；第一扰动件（220）和第二扰动件（230）在螺杆（200）轴向截面内产生楔形增压强化作用，形成强化熔融混炼机制，更加有效地提升螺杆（200）的熔融塑化效率。

Description

一种混沌单螺杆挤出注射装置 技术领域
本申请实施例涉及但不限于挤出注射装置领域，尤其涉及一种混沌单螺杆挤出注射装置。
背景技术
单螺杆机构具有结构简单、操作维护方便、能够建立稳定的挤出压力的优点，被广泛应用于挤出成型和注射成型过程。单螺杆机构以摩擦拖曳机理为主，从螺棱法向截面来看，螺槽结构在展开后具有对称性，可以简化成方槽上盖拖动物理模型，固体输送、熔融、混炼及挤出建压均在这样的物理模型内完成，输送机理主要是摩擦拖曳输送。由于流道具有对称性，导致控制挤出过程的熔融塑化、混合混炼的效率低下，加工过程能耗巨大。为提高熔融塑化效率、提升混合混炼效果，目前工程界普遍采用分离型螺杆、屏障型螺杆、销钉螺杆等多种形式，主要通过分离固体床和熔池来强化传热，通过流体的切割分流来强化混合混炼，但强化元件尺度有限，作用不够显著，强化的机理仍局限在经典的层流混合；这些强化措施普遍存在加工弹性弱、固体物料容易阻塞螺槽、存在流道死区容易积料等缺陷。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本申请实施例提供了一种混沌单螺杆挤出注射装置，能够产生纵向挤压拉伸流场，叠加螺槽横截面环流作用，诱发混沌混合强化作用。
本发明解决其问题所采用的技术方案是：
一种混沌单螺杆挤出注射装置，包括：
机筒；
螺杆，所述螺杆设置于所述机筒内，所述螺杆的外表面设有螺棱、第一扰动件和第二扰动件，所述螺棱沿所述螺杆的轴向方向螺旋延伸，所述第一扰动件的一端与所述螺棱的推力面连接，所述第一扰动件的另一端向所述螺棱的拖曳面方向延伸，所述第二扰动件的一端与所述螺棱的拖曳面连接，所述第二扰动件的另一端向所述螺棱的推力面方向延伸。
进一步，所述第一扰动件和所述第二扰动件为曲面锥形结构。
进一步，所述第一扰动件和所述第二扰动件在所述螺棱和所述机筒的内壁之间形成用于产 生挤压拉伸作用的间隙。
进一步，相邻的两条所述螺棱之间形成螺槽。
进一步，所述螺槽内设有折流板，所述折流板形成螺旋线的延伸走向。
进一步，所述第一扰动件的中心线偏心距离小于或等于所述螺槽的深度，所述第二扰动件的中心线偏心距离小于或等于所述螺槽的深度。
进一步，所述第一扰动件的高度满足以下式子：h1＝aH，h1为第一扰动件的高度；所述第二扰动件的高度满足以下式子：h2＝aH，h2为第二扰动件的高度；H为所述螺槽的深度，a为权值参数，a的取值范围为0.01至1。
进一步，所述第一扰动件对应的圆心角的范围为π/10≤α1≤2π，α1为第一扰动件对应的圆心角；所述第二扰动件对应的圆心角的范围为π/10≤α2≤2π，α2为第二扰动件对应的圆心角。
进一步，所述折流板的高度小于或等于所述螺槽的深度。
进一步，所述折流板的中心线与所述螺杆的轴线呈偏心布置，所述折流板的偏心距离小于或等于所述螺槽的深度。
上述混沌单螺杆挤出注射装置至少具有以下的有益效果：在注射成型过程中，螺杆产生轴向前进后退作用，混沌单螺杆挤出注射装置能够产生纵向挤压拉伸流场，叠加螺槽横截面内横向环流作用，诱发混沌混合强化作用，在保证了流道顺畅的同时，有效强化了物料的熔融塑化和混合混炼效率；第一扰动件和第二扰动件在螺杆轴向截面内产生楔形增压强化作用，形成强化熔融混炼机制，更加有效地提升螺杆的熔融塑化效率。
附图说明
附图用来提供对本申请技术方案的进一步理解，并且构成说明书的一部分，与本申请的实施例一起用于解释本申请的技术方案，并不构成对本申请技术方案的限制。
图1是本申请实施例所提供的一种混沌单螺杆挤出注射装置的结构图；
图2是本申请实施例所提供的螺杆的结构图；
图3是第一扰动件和第二扰动件在螺杆横截面内几何构型的结构图；
图4是折流板在螺杆横截面内几何构型的结构图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申 请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
需要说明的是，虽然在装置示意图中进行了功能模块划分，在流程图中示出了逻辑顺序，但是在某些情况下，可以以不同于装置中的模块划分，或流程图中的顺序执行所示出或描述的步骤。说明书、权利要求书或上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
本申请的实施例提供了一种混沌单螺杆挤出注射装置，包括机筒和螺杆，螺杆设置于机筒内，螺杆的外表面设有螺棱、第一扰动件和第二扰动件，螺棱沿螺杆的轴向方向螺旋延伸，第一扰动件的一端与螺棱的推力面连接，第一扰动件的另一端向螺棱的拖曳面方向延伸，第二扰动件的一端与螺棱的拖曳面连接，第二扰动件的另一端向螺棱的推力面方向延伸；能够产生纵向流场，叠加螺槽横截面内横向环流作用，诱发混沌混合强化作用，在保证了流道顺畅的同时，有效强化了物料的熔融塑化和混合混炼效率；在注射成型过程中，螺杆产生轴向前进后退作用，第一扰动件和第二扰动件在螺杆轴向截面内产生楔形增压强化作用，形成强化熔融混炼机制，更加有效地提升螺杆的熔融塑化效率。
下面结合附图，对本申请实施例作进一步阐述。
参照图1和图2，本申请的实施例提供了一种混沌单螺杆挤出注射装置。混沌单螺杆挤出注射装置包括机筒100和螺杆200。
其中，螺杆200设置于机筒100内，螺杆200的外表面设有螺棱210、第一扰动件220和第二扰动件230，螺棱210沿螺杆200的轴向方向螺旋延伸，第一扰动件220的一端与螺棱210的推力面201连接，第一扰动件220的另一端向螺棱210的拖曳面202方向延伸，第二扰动件230的一端与螺棱210的拖曳面202连接，第二扰动件230的另一端向螺棱210的推力面201方向延伸。
螺棱210的左右两侧壁根据输送物料受力情况分别形成拖曳面202和推力面201。
螺杆200的外表面与机筒100的内表面之间形成物料输送通道140。
机筒100的一端的上侧设有进料口101，另一端设有出料口102，机筒100从进料口101至出料口102方向依次设置有输送段110、熔融段120和计量段130。计量段130包括混炼段及均化段。
在该实施例中，在注射成型过程中，螺杆200产生轴向前进后退作用，混沌单螺杆挤出注射装置能够产生纵向流场，叠加螺槽横截面内横向环流作用，诱发混沌混合强化作用，在保证了流道顺畅的同时，有效强化了物料的熔融塑化和混合混炼效率；第一扰动件220和第 二扰动件230在螺杆200轴向截面内产生楔形增压强化作用，形成强化熔融混炼机制，更加有效地提升螺杆200的熔融塑化效率。
在某些实施例中，螺棱210的最外侧与机筒100的内表面相切配合。
在某些实施例中，第一扰动件220和第二扰动件230为曲面锥形结构。这使得混沌单螺杆挤出注射装置能够产生之字形纵向流场，叠加螺槽横截面内横向环流作用，诱发混沌混合强化作用。
在某些实施例中，第一扰动件220和第二扰动件230在螺棱210和机筒100的内壁之间形成用于产生挤压拉伸作用的间隙。当物料经过的时候，间隙对物料产生局部挤压拉伸作用。
在某些实施例中，相邻的两条螺棱210之间形成螺槽。
在某些实施例中，第一扰动件220和第二扰动件230从螺杆200的压缩段开始呈周期性布置。
参照图3，在某些实施例中，第一扰动件220的中心线偏心距离小于或等于螺槽的深度，第二扰动件230的中心线偏心距离小于或等于螺槽的深度。即第一扰动件220的中心线偏心距离为e1，e1的取值范围为0至H；第二扰动件230的中心线偏心距离为e2，e2的取值范围为0至H。
在某些实施例中，第一扰动件220的高度满足以下式子：h1＝aH，h1为第一扰动件220的高度；第二扰动件230的高度满足以下式子：h2＝aH，h2为第二扰动件230的高度；H为螺槽的深度，a为权值参数，a的取值范围为0.01至1。
在某些实施例中，第一扰动件220对应的圆心角的范围为π/10≤α1≤2π，α1为第一扰动件220对应的圆心角；第二扰动件230对应的圆心角的范围为π/10≤α2≤2π，α2为第二扰动件230对应的圆心角。
例如，可以理解的是，对于曲面锥形结构的第一扰乱件和第二扰乱件，锥形的底边的一个顶点与螺杆200的圆心连成一条边，锥形的底边的另一个顶点与螺杆200的圆心连成另一条边，两条边形成圆心角。∠AOB为第一扰动件220对应的圆心角α1。
在某些实施例中，第一扰动件220和第二扰动件230均采用多叶结构，当叶数为N，多叶结构的扰动件的相位差小于等于2π/N。
第一扰动件220的导程和第二扰动件230的导程均可以与螺棱210的导程相同，也可以与螺棱210的导程不同。
参照图4，在某些实施例中，螺槽内设有折流板240，折流板240形成螺旋线的延伸走向。
在某些实施例中，折流板240在螺杆200横截面内呈突出结构；优选地，突出结构为矩 形或者类似矩形结构。
在某些实施例中，折流板240可以单叶，也可以多叶，多叶折流板240采用峰谷交错模式布置，最大幅度提升扰动作用，强化熔融混炼效果。
在某些实施例中，折流板240从螺杆200的压缩段开始呈周期性布置。
在某些实施例中，折流板240的高度小于或等于螺槽的深度。
第i个折流板240的高度为hb i，则hb i的取值范围为0至H。例如第一个折流板240的高度hb 1和第二个折流板240的高度hb 2均满足取值范围为0至H。
在某些实施例中，折流板240的中心线与螺杆200的轴线呈偏心布置，折流板240的偏心距离小于或等于螺槽的深度。
折流板240有多个，第i个折流板240的偏心距离为eb i，则eb i的取值范围为0至H。例如第一个折流板240的偏心距离eb 1和第二个折流板240的偏心距离eb 2均满足取值范围为0至H。
折流板240的导程可以与螺棱210的导程相同，也可以与螺棱210的导程不同。例如，折流板240的导程为Lb，折流板240的导程与螺棱210的导程相等，即有Lb＝L。又例如，折流板240第一叶导程为Lb1＝0.8L，折流板240第二叶导程为Lb2＝1.2L。
折流板240结构与螺杆200螺棱210成一定螺旋角度在螺槽内延伸，结构呈现流线型，且高度呈现周期性变化，多叶折流板240之间呈现峰谷交错布置，实现对流体的切割分流作用，同时在螺槽内引入同宿轨道扰动方式触发混沌混合，提供了螺槽内流体另外一种混沌混合机制，进一步强化了熔融和混炼效率。
在该实施例中，流线型的第一扰动件220和第二扰动件230，以及流线型无突变的折流板240，通过与主螺杆200轴线偏性设置螺旋扫略成型，引入偏性非对称作用，能有效降低了流体的滞止效应，提高了螺槽的自洁能力。
本申请的某些实施例，提供了一种塑化挤出方法，该塑化挤出方法应用如上的混沌单螺杆挤出注射装置。
物料从进料口101进入至机筒100，螺杆200绕自身轴线旋转；受摩擦力的作用下，物料在物料流动通道中沿螺槽向出料口102运动并不断被压实，通过输送段110，进入熔融段120。
进入熔融段120的物料在螺杆200的旋转作用下沿螺槽不断前行，并进一步被压实形成固体床，在外加热和摩擦生热的作用下发生部分熔融；物料形成的固体床沿螺槽纵向不断被向前推进，受到第一扰动件220、第二扰动件230和折流板240的协同作用而加速了熔融过 程。具体表现在：前行的物料受到第一扰动件220和第二扰动件230挤压变向作用，诱导混沌混合，同时沿着螺杆200轴向产生楔形增压作用，加速了熔膜迁移，有效地提升了熔融效率。此外，折流板240高度呈现周期性变化，多叶折流板240之间呈现峰谷交错布置，实现对流体的切割分流作用，同时在螺槽内引入同宿轨道扰动方式触发混沌混合，提供了螺槽内流体另外一种混沌混合机制，提供了分散熔融机理，进一步强化了熔融效率。熔融的物料在摩擦力的作用下继续向前输送，进入计量段130。
进入计量段130的熔融的物料在摩擦力作用下继续前行。熔体受到第一扰动件220、第二扰动件230和折流板240的作用，一方面通过曲面锥形扰动结构产生局部压缩拉伸作用，另一方面产生之字形纵向流场，叠加螺槽横截面内横向环流作用，诱发混沌混合强化作用，在保证了流道顺畅的同时，有效强化了物料的混合混炼效率；另一方面，锥形扰动结构的存在，当注射成型过程中，螺杆200产生轴向前进后退作用时，在螺杆200轴向截面内产生楔形增压强化拉伸场作用，形成另外一种强化熔融混炼的机制，更加有效地提升螺杆200的混合混炼效率。并进一步完成了物料的熔融和塑化过程，熔融塑化的熔体随着螺杆200的后退运动不断被输送到螺杆200和机筒100之间形成的空腔中。
当螺杆200到达后退的极限位置后，在外加轴向推力的作用下沿机筒100轴线向前运动，推动螺杆200前方的塑化好的熔体从出料口102射出，实现注射运动，完成塑化注射一个周期。塑化注射属于周期性过程，当注射动作完成后，可以重复上述过程。

Claims (10)

  1. 一种混沌单螺杆挤出注射装置，其特征在于，包括：
    机筒；
    螺杆，所述螺杆设置于所述机筒内，所述螺杆的外表面设有螺棱、第一扰动件和第二扰动件，所述螺棱沿所述螺杆的轴向方向螺旋延伸，所述第一扰动件的一端与所述螺棱的推力面连接，所述第一扰动件的另一端向所述螺棱的拖曳面方向延伸，所述第二扰动件的一端与所述螺棱的拖曳面连接，所述第二扰动件的另一端向所述螺棱的推力面方向延伸。
  2. 根据权利要求1所述的一种混沌单螺杆挤出注射装置，其特征在于，所述第一扰动件和所述第二扰动件为曲面锥形结构。
  3. 根据权利要求1所述的一种混沌单螺杆挤出注射装置，其特征在于，所述第一扰动件和所述第二扰动件在所述螺棱和所述机筒的内壁之间形成用于产生挤压拉伸作用的间隙。
  4. 根据权利要求1所述的一种混沌单螺杆挤出注射装置，其特征在于，相邻的两条所述螺棱之间形成螺槽。
  5. 根据权利要求4所述的一种混沌单螺杆挤出注射装置，其特征在于，所述螺槽内设有折流板，所述折流板形成螺旋线的延伸走向。
  6. 根据权利要求4所述的一种混沌单螺杆挤出注射装置，其特征在于，所述第一扰动件的中心线偏心距离小于或等于所述螺槽的深度，所述第二扰动件的中心线偏心距离小于或等于所述螺槽的深度。
  7. 根据权利要求4所述的一种混沌单螺杆挤出注射装置，其特征在于，所述第一扰动件的高度满足以下式子：h1＝aH，h1为所述第一扰动件的高度；所述第二扰动件的高度满足以下式子：h2＝aH，h2为所述第二扰动件的高度；H为所述螺槽的深度，a为权值参数。
  8. 根据权利要求1所述的一种混沌单螺杆挤出注射装置，其特征在于，所述第一扰动件对应的圆心角的范围为π/10≤α1≤2π，α1为所述第一扰动件对应的圆心角；所述第二扰动件对应的圆心角的范围为π/10≤α2≤2π，α2为所述第二扰动件对应的圆心角。
  9. 根据权利要求5所述的一种混沌单螺杆挤出注射装置，其特征在于，所述折流板的高度小于或等于所述螺槽的深度。
  10. 根据权利要求5所述的一种混沌单螺杆挤出注射装置，其特征在于，所述折流板的中心线与所述螺杆的轴线呈偏心布置，所述折流板的偏心距离小于或等于所述螺槽的深度。
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