CN110615909B - 介质材料及介质材料生产方法 - Google Patents

介质材料及介质材料生产方法 Download PDF

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CN110615909B
CN110615909B CN201910867980.8A CN201910867980A CN110615909B CN 110615909 B CN110615909 B CN 110615909B CN 201910867980 A CN201910867980 A CN 201910867980A CN 110615909 B CN110615909 B CN 110615909B
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dielectric material
body structure
pipe body
pipe
extruding machine
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CN110615909A (zh
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郑洪振
芦永超
李伟
尚春辉
孙耀志
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Guangdong Fushun Tianji Communication Co., Ltd
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Priority to PCT/CN2019/116967 priority patent/WO2021051524A1/zh
Priority to US17/638,342 priority patent/US11890799B2/en
Priority to EP19945734.2A priority patent/EP4020713A4/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract

本发明提供一种介质材料，用来解决现时介质材料生产效率较低、生产成本较高的问题。介质材料，是一管体结构，管体结构的管壁是发泡材料发泡后形成的；还包括若干金属线段，所述金属线段沿管体结构的纵向布置，互不接触且均匀地分布在管体结构的管壁之内。这样结构的介质材料具有结构简单，介电常数可准确控制，单位体积重量轻，易于高效生产、技术指标稳定等优点。本发明还提供一种可用于生产所述介质材料的生产方法。

Description

介质材料及介质材料生产方法
技术领域
本发明涉及介质材料制造领域，更具体地说，涉及可用于制作龙伯透镜的介质材料及该介质材料的生产方法。
背景技术
名为“AN ARTIFICIAL DIELECTRIC MATERIAL AND A METHOD OF MANUFACTURINGTHE SAME”，公开号为WO2009078807，公开日为2009年6月25日的专利文献公开了一种人造介电材料及其制造方法,这种人造介电材料可以用于制造龙伯透镜。其技术方案主要是将平行布置的长的导电纤维放入到上下两片发泡材料之间，在粘合固定后再将这样的三文治结构的片切割成颗粒，所得的颗粒中即带有短的互相不接触的导电纤维，将这些颗粒随机混合并用粘合剂固定在一起即制得介电常数受控的介电材料。
然而该公开文献所描述的产品及制造方法在实际上是存在缺陷的：由于颗粒的尺寸很小，通常只有几毫米见方，因此在将该三文治结构的片切割成颗粒时，所采用的刀法基本上就是经向加纬向的切法，这就导致后期的裁切工作量比较大，裁切的精度要求也比较高，最终都会导致生产成本的增加。
于是需要对现有的介电材料的结构以及制造方法进行改进。
发明内容
本发明提供一种介质材料，用来解决现时介质材料生产效率较低、生产成本较高的问题。
介质材料，特别地，是一管体结构，管体结构的管壁是发泡材料发泡后形成的；还包括若干金属线段，所述金属线段沿管体结构的纵向布置，互不接触且均匀地分布在管体结构的管壁之内。
所述发泡材料优选是EPE珍珠棉或EPS或EVA等材料。
所述金属线段的数量优选在2至8根。金属线段的直径优选在0.01～0.5mm范围内。
所述管体结构的横截面的外周轮廓形状可以是圆形或者正多边形等。
所述管体结构的横截面的内周轮廓形状也可以是圆形或者正多边形等。
所述管体结构的横截面的外周轮廓形状一般不超出半径为20mm的圆范围。
所述管体结构的长度一般不超过20mm。
所述管体结构的横截面的外周轮廓形状和内周轮廓形状都是圆形的时候，外周的直径优选在4至12mm，内周的直径选为外周的直径的0.3至0.7倍。
这样结构的介质材料具有结构简单，介电常数可准确控制，单位体积重量轻，易于高效生产、技术指标稳定等优点。将这样的材料用于生产龙伯透镜的话，则可显著降低龙伯透镜的生产成本和重量，对龙伯透镜在通信天线上的使用和推广起到了非常积极的作用。
应当说明的是，介质材料的重要指标是介电常数，管体结构的管壁所用的发泡材料应该选用介电常数尽可能低的材料。而金属线段的数量、材料和直径都是可以用来提升介电常数的，且这些材料和/或参数是可以人为控制的，于是通过人为设定这些材料和/或参数就可以令所生产出来的介质材料的介电常数最终符合目标。
本发明还提供一种介质材料生产方法，用于高效、低成本地生产单位体积重量较轻的介质材料。采用以下技术方案：
介质材料生产方法，包括以下步骤：
1)将若干根金属线穿入到挤棒机的挤压腔内并从挤棒机的挤出口穿出；在挤棒机挤出管形的材料的同时，同步地牵引各金属线，且确保各根金属线互不接触且均匀地分布在管壁之内，此时得到夹丝管；
2)后续将夹丝管截断成所需的长度即得到介质材料；
所述的挤棒机是发泡材料挤棒机。
通过这样的技术方案，即可简单高效地制得内部夹有金属线段的管体结构的介质材料，而不需要进行经向和纬向的裁切。并且由于这样的介质材料主要是发泡后的结构，管体结构即表明它是中空的，因此其单位体积的重量非常轻。而通过选定金属线的数量、材料和直径等就可以控制最终的介质材料的平均介电常数。
本生产方法的挤棒机所用的材料优选为EPE珍珠棉或EPS或EVA等材料。
所述夹丝管的横截面的外轮廓形状可以是圆形或者正多边形或者其他形状。
所述夹丝管的横截面的内轮廓形状可以是圆形或者正多边形或者其他形状。
另外，在将夹丝管进行截断之前，最好先给予时间夹丝管充分膨胀和降温以令其形状变得稳定。
将夹丝管进行截断时，其每段的长度一般不超过20mm。
本发明的介电材料生产方法具有生产效率高、成本低、重量轻、容易控制介电特性等优点，所制得的介质材料可用于龙伯透镜的制作。
附图说明：
图1是实施例1的介质材料的主视结构示意图；
图2是图1的A-A向剖视结构示意图；
图3是实施例2的介质材料的主视结构示意图；
图4是图3的B-B向剖视结构示意图；
图5是实施例3的介质材料的主视结构示意图；
图6是实施例4的介质材料的主视结构示意图。
附图标记说明：1-介质材料；11-金属线段；2-介质材料；21-金属线段；3-介质材料；31-金属线段；4-介质材料；41-金属线段。
具体实施方式
下面结合实施例对本发明内容作进一步说明。
实施例1
本实施例是本发明介质材料结构的说明例。
如图1、图2所示，本实施例的介质材料1是一管体结构，管体结构的管壁是发泡材料发泡后形成的。还包括4根金属线段11，金属线段11沿管体结构的纵向布置，互不接触且均匀地分布在管体结构的管壁之内。
本实施例的介质材料1其管体结构的横截面的外周轮廓为圆形，直径D1为6mm，其管体结构的横截面的内周轮廓也为圆形，直径D2为直径D1的0.5倍，即直径D2为3mm；管体结构的高度H是6mm。而金属线段11的直径为0.2mm，金属线段11的长度是与管体结构的高度H相同。
本实施例的管体结构的管壁为EPE珍珠棉，即聚乙烯发泡棉。
这样结构的介质材料具有易于批量生产以及单位体积重量轻等优点。
实施例2
本实施例是本发明介质材料结构的另一说明例。
如图3、图4所示，本实施例与实施例1的不同之处在于：管体结构的横截面的内周轮廓为正方形，正方形的外接圆的直径D3为3mm。
实施例3
本实施例是本发明介质材料结构的另一说明例。
如图5所示，本实施例与实施例1的不同之处在于：金属线段31的数量为6根，金属线段31以另一种排列方式实现均匀地分布在管体结构的管壁之内。
实施例4
本实施例是本发明介质材料结构的另一说明例。
如图6所示，本实施例与实施例1的不同之处在于：金属线段41的数量为8根，金属线段41以另一种排列方式实现均匀地分布在管体结构的管壁之内。
实施例5
本实施例是本发明介质材料生产方法的说明例。
1)将4根金属线穿入到挤棒机的挤压腔内并从挤棒机的挤出口穿出。这4根金属线是各自绕成线盘，在生产时再进行放卷的。挤棒机是发泡材料挤棒机，本实施例所用的材料为EPE珍珠棉原料。在挤棒机挤出材料形成管体结构的同时，同步地牵引各金属线，通过对挤出口的形状进行相应的设计，则可确保各根金属线互不接触且均匀地分布在管壁之内，此时得到夹丝管；本实施例的夹丝管的直径为6mm；
2)后续通过定长裁切机将夹丝管截断成高度为6mm的管体结构，即制得实施例1所述结构的介质材料。
应当说明的是，在步骤1)中所得到的夹丝管可以被定长裁断为相同的长度后再进入到步骤2)，也可以是先整体绕成线盘再进入到步骤2)。
本说明书列举的仅为本发明的较佳实施方式，凡在本发明的工作原理和思路下所做的等同技术变换，均视为本发明的保护范围。

Claims (6)

1.介质材料，其特征是：是一管体结构，管体结构的管壁是发泡材料发泡后形成的；还包括若干金属线段，所述金属线段沿管体结构的纵向布置，互不接触且均匀地分布在管体结构的管壁之内；所述管体结构的横截面的外周轮廓形状和内周轮廓形状都是圆形，外周的直径在4至12mm，内周的直径为外周的直径的0.3至0.7倍；所述管体结构的长度不超过20mm。
2.如权利要求1所述的介质材料，其特征是：所述发泡材料是EPE珍珠棉或EPS或EVA材料。
3.如权利要求1所述的介质材料，其特征是：所述金属线段的数量在2至8根。
4.如权利要求1所述的介质材料，其特征是：金属线段的直径在0.01～0.5mm范围内。
5.一种权利要求1所述介质材料的生产方法，其特征是：包括以下步骤：
1）将若干根金属线穿入到挤棒机的挤压腔内并从挤棒机的挤出口穿出；在挤棒机挤出管形的材料的同时，同步地牵引各金属线，且确保各根金属线互不接触且均匀地分布在管壁之内，此时得到夹丝管；所述夹丝管的横截面的外轮廓形状是圆形；所述夹丝管的横截面的内轮廓形状是圆形；
2）后续将夹丝管截断成所需的长度即得到介质材料；
所述的挤棒机是发泡材料挤棒机。
6.如权利要求5所述的介质材料生产方法，其特征是：挤棒机所用的材料为EPE珍珠棉或EPS或EVA材料。
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