CN205395087U - A double planetary screw extruder for degradable plastics - Google Patents
A double planetary screw extruder for degradable plastics Download PDFInfo
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- CN205395087U CN205395087U CN201620164281.9U CN201620164281U CN205395087U CN 205395087 U CN205395087 U CN 205395087U CN 201620164281 U CN201620164281 U CN 201620164281U CN 205395087 U CN205395087 U CN 205395087U
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- 229920006238 degradable plastic Polymers 0.000 title claims abstract description 18
- 238000001125 extrusion Methods 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 238000009826 distribution Methods 0.000 abstract description 3
- 230000014759 maintenance of location Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229920003023 plastic Polymers 0.000 abstract description 3
- 239000004033 plastic Substances 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000000739 chaotic effect Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000035553 feeding performance Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
技术领域 technical field
本实用新型涉及生产设备领域，更具体地涉及可降解塑料双行星螺杆挤出机。 The utility model relates to the field of production equipment, in particular to a double planetary screw extruder for degradable plastics.
背景技术 Background technique
在20世纪６０年代初，这种设备进一步发展为具有45°的螺旋角斜齿的可降解塑料双行星螺杆挤出机，具有密炼机优良的热交换性能和能在密闭系统中预定物料停留时间这两个优点。 In the early 1960s, this equipment was further developed into a degradable plastic double planetary screw extruder with helical teeth of 45°, which has excellent heat exchange performance of internal mixer and can predetermine material retention in a closed system. Time these two advantages.
现今，可降解塑料双行星螺杆挤出机除了用于ＰＶＣ造粒，压延机和层压机喂料，热固性塑料混炼以外，还大量用于通用塑料和工程塑料的混炼。但在实际应用生产中，可降解塑料双行星螺杆挤出机还存在以下问题：（1）螺杆挤出机的物料输送主要靠摩擦，使其加料性能受到限制，粉料、糊状料、玻璃纤维及无机填料等较难加入；(2)当机头压力较高时，逆流增加，使生产率降低；(3)单螺杆排气挤出机物料在排气区的表面更新作用小，因而排气效果较差。 Nowadays, in addition to PVC granulation, calender and laminator feeding, and thermosetting plastic mixing, degradable plastic twin planetary screw extruders are also widely used for mixing general-purpose plastics and engineering plastics. However, in practical production, the degradable plastic twin-planetary screw extruder still has the following problems: (1) The material transportation of the screw extruder mainly depends on friction, which limits the feeding performance. Powder, paste material, glass It is difficult to add fibers and inorganic fillers; (2) When the head pressure is high, the countercurrent increases, which reduces productivity; (3) The surface renewal effect of single-screw exhaust extruder materials in the exhaust area is small, so the discharge Gas effect is poor.
实用新型内容 Utility model content
为了解决上述问题，本实用新型的目的在于：提供一种可降解塑料双行星螺杆挤出机，通过对单螺杆螺槽内流体的数值模拟和实验,提出了一种将混沌流动引入到单螺杆挤出中来提高混合效果的方法,并研制出了一种嵌入式可降解塑料双行星螺杆挤出机，该机器构型容易引发混沌流动,从而提高物料分布及分散效果，以解决上述问题。 In order to solve the above problems, the purpose of this utility model is to provide a degradable plastic double planetary screw extruder, through the numerical simulation and experiment of the fluid in the single-screw groove, a method of introducing chaotic flow into the single-screw The method of improving the mixing effect in extrusion, and developed an embedded degradable plastic double planetary screw extruder, the machine configuration is easy to cause chaotic flow, so as to improve the material distribution and dispersion effect, in order to solve the above problems.
为了达到上述目的，本实用新型的技术方案为：一种可降解塑料双行星螺杆挤出机，包括加料装置、行星螺杆装置、排气装置和挤出装置，所述加料装置与所述行星螺杆装置连接，所述行星螺杆装置与所述排气装置连接，所述排气装置与所述挤出装置连接，所述行星螺杆装置由中心螺杆、行星螺杆和内有螺纹齿的外套机筒组成，所述挤出装置由内有螺纹齿的外套机筒和单螺杆组成。 In order to achieve the above purpose, the technical solution of the present invention is: a degradable plastic double planetary screw extruder, including a feeding device, a planetary screw device, an exhaust device and an extrusion device, the feeding device and the planetary screw The device is connected, the planetary screw device is connected with the exhaust device, the exhaust device is connected with the extrusion device, and the planetary screw device is composed of a central screw, a planetary screw and an outer casing with helical teeth inside , the extrusion device is composed of an outer sleeve with threaded teeth and a single screw.
本实用新型的有益效果在于：通过在单阶行星螺杆挤出机之后增加排气装置和一个排料单螺杆挤出机（及二阶）就形成了双阶行星螺杆挤出机，双阶行星螺杆挤出机的两阶分别采用单独的驱动装置，因此各项操作，及输送、混炼、排气和压缩都可能独立地进行控制，为优化加工创造了良好的条件。 The beneficial effect of the utility model is that a double-stage planetary screw extruder is formed by adding an exhaust device and a discharge single-screw extruder (and a second stage) after the single-stage planetary screw extruder, and the double-stage planetary screw extruder The two stages of the screw extruder use separate drive devices, so each operation, as well as conveying, mixing, exhaust and compression, can be controlled independently, creating good conditions for optimized processing.
作为本实用新型的进一步改进，还包括有喂料装置，设置于所述加料装置和所述行星螺杆装置之间。普通单螺杆挤出机的加料装置由于压力很低，很长一截只是部分充满物料。增加喂料装置能加强加料效率。 As a further improvement of the utility model, a feeding device is also included, which is arranged between the feeding device and the planetary screw device. Due to the low pressure of the feeding device of ordinary single-screw extruder, a long section is only partially filled with materials. Adding feeding devices can enhance feeding efficiency.
作为本实用新型的进一步改进，所述单螺杆为三段式螺杆。采用普通三段式螺杆，主要作用不是混炼而是输送。 As a further improvement of the utility model, the single screw is a three-section screw. Using ordinary three-stage screw, the main function is not mixing but conveying.
作为本实用新型的进一步改进，所述排气装置为与所述行星螺杆装置和所述挤出装置连接的密闭金属构件。 As a further improvement of the present utility model, the exhaust device is a closed metal component connected with the planetary screw device and the extrusion device.
作为本实用新型的进一步改进，所述行星螺杆与所述机筒内齿之间的间隙为0.2~0.4mm。其中，0.3mm为最佳。 As a further improvement of the utility model, the gap between the planetary screw and the inner teeth of the barrel is 0.2-0.4 mm. Among them, 0.3mm is the best.
作为本实用新型的进一步改进，所述行星螺杆的根数为6~18条。采用12条时达到最佳效果。 As a further improvement of the utility model, the number of the planetary screws is 6-18. Best results are achieved with 12 strips.
附图说明 Description of drawings
图1为本实用新型的结构示意图。 Fig. 1 is the structural representation of the utility model.
图2为本实用新型的行星螺杆装置的剖视图。 Fig. 2 is a sectional view of the planetary screw device of the present invention.
具体实施方式 detailed description
为了使本实用新型的目的，技术方案及优点更加清晰明了，对其进一步详细说明，参照图1至图2。 In order to make the object, technical solution and advantages of the present utility model clearer, for further detailed description, refer to Fig. 1 to Fig. 2 .
一种可降解塑料双行星螺杆挤出机，包括加料装置1、行星螺杆装置2、排气装置3和挤出装置4，加料装置1与行星螺杆装置2连接，行星螺杆装置2与排气装置3连接，排气装置3与挤出装置4连接，行星螺杆装置2由中心螺杆21、行星螺杆22和内有螺纹齿的外套机筒23组成，挤出装置4由内有螺纹齿的外套机筒和单螺杆组成。 A double planetary screw extruder for degradable plastics, comprising a feeding device 1, a planetary screw device 2, an exhaust device 3 and an extrusion device 4, the feeding device 1 is connected to the planetary screw device 2, and the planetary screw device 2 is connected to the exhaust device 3 connection, the exhaust device 3 is connected with the extrusion device 4, the planetary screw device 2 is composed of a central screw 21, a planetary screw 22 and an outer casing barrel 23 with thread teeth inside, and the extrusion device 4 is composed of an outer casing machine with thread teeth inside Composed of barrel and single screw.
通过在单阶行星螺杆挤出机之后增加排气装置3和一个排料单螺杆挤出机（及二阶）就形成了双阶行星螺杆挤出机，双阶行星螺杆挤出机的两阶分别采用单独的驱动装置，因此各项操作，及输送、混炼、排气和压缩都可能独立地进行控制，为优化加工创造了良好的条件，并具有以下优点：1.流道无死角，呈线性，具有良好的自洁作用；2.塑料温度可以由调整热油温度来达到精准控制；3.热交换面积大；4.啮合螺杆的总啮合次数非常高，进而能达到更好的塑化效果；5.物料停留时间短，停留时间分布范围窄；6.排气功能良好，比能耗低，产量高，经济效益好。 By adding an exhaust device 3 and a discharge single-screw extruder (and second stage) after the single-stage planetary screw extruder, a two-stage planetary screw extruder is formed, and the two stages of the two-stage planetary screw extruder Separate drive devices are used, so each operation, as well as conveying, mixing, exhaust and compression can be controlled independently, creating good conditions for optimized processing, and has the following advantages: 1. There is no dead angle in the flow channel, It is linear and has a good self-cleaning effect; 2. The temperature of the plastic can be precisely controlled by adjusting the temperature of the hot oil; 3. The heat exchange area is large; 4. The total number of meshing times of the meshing screw is very high, which can achieve better plasticity 5. The residence time of the material is short and the distribution range of the residence time is narrow; 6. The exhaust function is good, the specific energy consumption is low, the output is high, and the economic benefit is good.
本实用新型还包括有喂料装置5，设置于加料装置1和行星螺杆装置2之间。普通单螺杆挤出机的加料装置1由于压力很低，很长一截只是部分充满物料。增加喂料装置5能加强加料效率。 The utility model also includes a feeding device 5 arranged between the feeding device 1 and the planetary screw device 2 . The feeding device 1 of a common single-screw extruder is only partially filled with material for a long section because the pressure is very low. Increasing feeding device 5 can enhance feeding efficiency.
单螺杆为三段式螺杆。采用普通三段式螺杆，主要作用不是混炼而是输送。 The single screw is a three-stage screw. Using ordinary three-stage screw, the main function is not mixing but conveying.
排气装置3为与行星螺杆装置2和挤出装置4连接的密闭金属构件。 The exhaust device 3 is an airtight metal component connected with the planetary screw device 2 and the extrusion device 4 .
行星螺杆22与机筒内齿23之间的间隙为0.2~0.4mm。其中，0.3mm为最佳。 The gap between the planetary screw 22 and the inner teeth 23 of the barrel is 0.2-0.4mm. Among them, 0.3mm is the best.
行星螺杆22的根数为6~18条。采用12条时达到最佳效果。 The number of planetary screws 22 is 6-18. Best results are achieved with 12 strips.
工作原理：被加料装置1的螺纹推到行星螺杆装置2的原料，在其后部螺杆进料的连续强力推动下，向螺杆前方机头挤出处移动，从中心螺杆21和机筒23间的内螺纹齿间和与其啮合的行星螺杆22齿间通过；由于行星螺杆22中各螺杆不断转动，使原料在相互啮合转动的螺纹齿间隙中受到强烈的挤压、辗伸和剪切等多种力作用，使原料在此段不断地被翻动、混合，最后成熔融状态，被均匀塑化，逐渐被推向螺杆前段，从机头挤出。 Working principle: The raw material pushed to the planetary screw device 2 by the screw thread of the feeding device 1, under the continuous strong push of the rear screw feeding, moves to the extruding position of the front of the screw, from the center screw 21 and barrel 23 The teeth of the internal thread of the planetary screw and the teeth of the planetary screw 22 meshing with it pass through; due to the continuous rotation of the screws in the planetary screw 22, the raw materials are strongly squeezed, rolled and sheared in the intermeshing and rotating thread gaps. Under the action of force, the raw materials are continuously turned and mixed in this section, and finally become a molten state, uniformly plasticized, gradually pushed to the front section of the screw, and extruded from the machine head.
根据上述说明书的揭示和教导，本实用新型所属领域的技术人员还可以对上述实施方式进行适当的变更和修改。因此，本实用新型并不局限于上面揭示和描述的具体实施方式，对本实用新型的一些修改和变更也应当落入本实用新型的权利要求的保护范围内。此外，尽管本说明书中使用了一些特定的术语，但这些术语只是为了方便说明，并不对本实用新型构成任何限制。 According to the disclosure and teaching of the above specification, those skilled in the art to which the present utility model belongs can also make appropriate changes and modifications to the above embodiment. Therefore, the utility model is not limited to the specific implementation manners disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620164281.9U CN205395087U (en) | 2016-03-04 | 2016-03-04 | A double planetary screw extruder for degradable plastics |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620164281.9U CN205395087U (en) | 2016-03-04 | 2016-03-04 | A double planetary screw extruder for degradable plastics |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107160582A (en) * | 2017-07-17 | 2017-09-15 | 浙江晴天木塑科技有限公司 | Multigroup number control granulation unit of natural fiber based high molecular polymer composites |
| CN107685436A (en) * | 2017-11-03 | 2018-02-13 | 许梦艳 | A kind of ultra-high molecular weight polyethylene plasticized screw extruder |
-
2016
- 2016-03-04 CN CN201620164281.9U patent/CN205395087U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107160582A (en) * | 2017-07-17 | 2017-09-15 | 浙江晴天木塑科技有限公司 | Multigroup number control granulation unit of natural fiber based high molecular polymer composites |
| CN107160582B (en) * | 2017-07-17 | 2023-11-24 | 浙江晴天木塑科技有限公司 | Multi-group controlled granulator set for natural fiber-based high polymer composite material |
| CN107685436A (en) * | 2017-11-03 | 2018-02-13 | 许梦艳 | A kind of ultra-high molecular weight polyethylene plasticized screw extruder |
| CN107685436B (en) * | 2017-11-03 | 2019-09-10 | 许梦艳 | A kind of ultra-high molecular weight polyethylene plasticized screw extruder |
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