CN110689994B - 电磁介质颗粒及电磁介质颗粒生产方法 - Google Patents

电磁介质颗粒及电磁介质颗粒生产方法 Download PDF

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CN110689994B
CN110689994B CN201910845984.6A CN201910845984A CN110689994B CN 110689994 B CN110689994 B CN 110689994B CN 201910845984 A CN201910845984 A CN 201910845984A CN 110689994 B CN110689994 B CN 110689994B
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rod
electromagnetic medium
extruding machine
foaming layer
layer
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CN110689994A (zh
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郑洪振
芦永超
李伟
尚春辉
孙耀志
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Foshan Eahison Communication Co Ltd
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Foshan Eahison Communication Co Ltd
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Priority to CN201910845984.6A priority Critical patent/CN110689994B/zh
Priority to PCT/CN2019/116939 priority patent/WO2021047006A1/zh
Priority to EP19945277.2A priority patent/EP4020500A4/en
Priority to US17/638,623 priority patent/US20220342120A1/en
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    • G02B1/041—Lenses
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Abstract

本发明提供一种电磁介质颗粒，用来解决现时电磁介质颗粒生产效率较低、生产成本较高的问题。电磁介质颗粒，是一柱体结构，在柱体结构的横截面上从内到外依次为内芯、第一发泡层和第二发泡层；所述第一发泡层和第二发泡层是发泡材料发泡后形成的层；还包括若干金属线段，所述金属线段沿柱体结构的纵向布置，互不接触且均匀地分布在第一发泡层的外周。这样结构的电磁介质颗粒具有结构简单，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电磁介质颗粒的生产方法。

Description

电磁介质颗粒及电磁介质颗粒生产方法
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
本发明提供一种电磁介质颗粒，用来解决现时电磁介质颗粒生产效率较低、生产成本较高的问题。
电磁介质颗粒，特别地，是一柱体结构，在柱体结构的横截面上从内到外依次为内芯、第一发泡层和第二发泡层；还包括若干金属线段，所述金属线段沿柱体结构的纵向布置，互不接触且均匀地分布在第一发泡层的外周。
所述第一发泡层和第二发泡层是发泡材料发泡后形成的层，优选是EPE珍珠棉或EPS或EVA等材料。然而第一发泡层的材料也可以不同于第二发泡层的材料。
所述内芯的材料可以是非金属材料，也可以是金属材料。
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。
所述第一发泡层的横截面的轮廓形状可以是圆形或者正多边形。
所述第二发泡层的横截面的轮廓形状也可以是圆形或者正多边形。
所述第一发泡层和第二发泡层的横截面的轮廓形状都是圆形的时候，所述第二发泡层的直径优选在4至12mm；所述第一发泡层的直径优选为第二发泡层的0.3至0.7倍。
这样结构的电磁介质颗粒具有结构简单，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，电磁介质颗粒的重要指标是介电常数，第一发泡层和第二发泡层所用的发泡材料应该选用介电常数尽可能低的材料。而内芯的材料和直径，以及金属线段的数量、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电磁介质颗粒的介电常数最终符合目标。
本发明还提供一种电磁介质颗粒生产方法，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：
电磁介质颗粒生产方法，包括以下步骤：
1)用一线芯穿入到第一挤棒机的挤压腔内并从挤出口穿出；在第一挤棒机挤出材料的同时，同步地牵引所述线芯，令材料包覆住所述线芯，且确保线芯是处在材料的中央的，此时得到线芯棒；
2)将线芯棒穿入到第二挤棒机的挤压腔内并从第二挤棒机的挤出口穿出，同时还将若干根金属线也穿入到第二挤棒机的挤压腔内并从第二挤棒机的挤出口穿出；在第二挤棒机挤出材料的同时，同步地牵引所述线芯棒及各金属线，一方面确保各根金属线互不接触且均匀地分布在线芯棒的外周，另一方面确保第二挤棒机挤出的材料包覆住所述线芯棒和各金属丝，此时得到双层棒；
3)后续将双层棒截断成所需的长度即得到电磁介质颗粒；
所述的第一挤棒机和第二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带有导体线段的颗粒状的电磁介质颗粒，而不需要进行经向和纬向的裁切，并且由于这样的电磁介质颗粒主要是发泡后的结构，因此其单位体积的重量也非常轻。而且通过选定线芯的材料和直径，以及金属线的数量、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。
本生产方法的第一挤棒机和第二挤棒机所用的材料优选为EPE珍珠棉或EPS或EVA等材料。然而第一挤棒机所用的材料也可以不同于第二挤棒机所用的材料。
所述线芯棒的横截面的轮廓形状可以是圆形或者正多边形。
所述双层棒的横截面的轮廓形状也可以是圆形或者正多边形。
另外，在线芯棒穿入到第二挤棒机的挤压腔之前，最好先给予时间线芯棒充分膨胀和降温以令其形状变得稳定。
本发明的电磁介质颗粒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，所制得的介电材料可用于龙伯透镜的制作。
附图说明：
图1是实施例1的电磁介质颗粒的主视结构示意图；
图2是图1的A-A向剖视结构示意图；
图3是实施例2的电磁介质颗粒的主视结构示意图；
图4是图3的B-B向剖视结构示意图。
附图标记说明：1-电磁介质颗粒；11-内芯；12-第一发泡层；13-第二发泡层；14-金属线段；2-电磁介质颗粒；21-内芯；22-第一发泡层；23-第二发泡层；24-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
本实施例是本发明电磁介质颗粒结构的说明例。
如图1、图2所示，本实施例的电磁介质颗粒1是一圆柱体结构，在圆柱体结构的横截面上从内到外依次为内芯11、第一发泡层12和第二发泡层13。内芯11为PE材料。
如图1、图2所示，还包括有4根金属线段14。4根金属线段14是沿圆柱体结构的纵向布置的，互不接触且均匀地分布在第一发泡层12的外周。
本实施例的电磁介质颗粒1的圆柱体结构的底面直径为5mm，高度也是5mm。由于圆柱体结构的底面直径也就是第二发泡层13的直径，于是第二发泡层13的直径就是5mm。而第一发泡层14的直径是第二发泡层13直径的0.6倍，即第一发泡层12的直径是3mm。
本实施例的第一发泡层12的材料和第二发泡层13的材料均为EPE珍珠棉，即聚乙烯发泡棉。
实施例2
本实施例是本发明电磁介质颗粒结构的另一说明例。
如图3、图4所示，本实施例与实施例1的不同之处在于：电磁介质颗粒2的圆柱体结构的底面直径为8mm，高度是6mm；第一发泡层22的横截面的轮廓形状是正方形，该正方形的外接圆的直径是第二发泡层23的直径的0.625倍，即5mm；金属线段24只有2根，对应地紧贴在正方形的对称边上。
实施例3
本实施例是本发明电磁介质颗粒生产方法的说明例。
1)用一直径为0.5mm的PE材质的绕成线盘的线芯，将其一头穿入到第一挤棒机的挤压腔内并从第一挤棒机的挤出口穿出。线芯是在生产时再进行放卷。第一挤棒机是发泡材料挤棒机，所用的材料为EPE珍珠棉原料。启动第一挤棒机，在第一挤棒机挤出材料的同时，同步地牵引所述线芯，该同步是指牵引线芯的速度与第一挤棒机的挤出速度相同或大致相同，令发泡后的材料包覆住所述线芯，且确保线芯是处在材料的中央的，此时得到线芯棒；本实施例的线芯棒直径为3mm；
2)将线芯棒穿入到第二挤棒机的挤压腔内并从第二挤棒机的挤出口穿出。第二挤棒机是发泡材料挤棒机，所用的材料为EPE珍珠棉原料。同时还将4根金属线也穿入到第二挤棒机的挤压腔内并从第二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。在第二挤棒机挤出材料的同时，同步地牵引所述线芯棒及各金属线，通过对挤出口的形状进行相应的设计，则一方面可确保各根金属线互不接触且均匀地分布在线芯棒的外周，另一方面可确保第二挤棒机挤出的材料包覆住线芯棒和各金属丝，此时得到双层棒；本实施例的双层帮的直径为5mm；
3)后续通过定长裁切机将双层棒截断成高度为5mm的圆柱体结构，即制得实施例1所述结构的电磁介质颗粒。
应当说明的是，在步骤1)中所得到的线芯棒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)。
同样地，在步骤2)中所得到的双层棒可以被定长裁断为相同的长度后再进入到步骤3)，也可以是先整体绕成线盘再进入到步骤3)。
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 (10)

1.电磁介质颗粒，用于制作龙伯透镜，其特征是：是一柱体结构，在柱体结构的横截面上从内到外依次为内芯、第一发泡层和第二发泡层；所述第一发泡层和第二发泡层是发泡材料发泡后形成的层；还包括若干金属线段，所述金属线段沿柱体结构的纵向布置，互不接触且均匀地分布在第一发泡层的外周。
2.如权利要求1所述的电磁介质颗粒，其特征是：所述第一发泡层和第二发泡层是EPE珍珠棉或EPS或EVA材料。
3.如权利要求1所述的电磁介质颗粒，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或3所述的电磁介质颗粒，其特征是：金属线段的直径在0.01～0.5mm范围内。
5.如权利要求1所述的电磁介质颗粒，其特征是：所述第一发泡层的横截面的轮廓形状是圆形或者正多边形。
6.如权利要求1或5所述的电磁介质颗粒，其特征是：所述第二发泡层的横截面的轮廓形状是圆形或者正多边形。
7.如权利要求1所述的电磁介质颗粒，其特征是：所述第一发泡层和第二发泡层的横截面的轮廓形状都是圆形的时候，所述第二发泡层的直径在4至12mm；所述第一发泡层的直径为第二发泡层的0.3至0.7倍。
8.电磁介质颗粒生产方法，用于生产权利要求1的电磁介质颗粒，其特征是：包括以下步骤：
1)用一线芯穿入到第一挤棒机的挤压腔内并从挤出口穿出；在第一挤棒机挤出材料的同时，同步地牵引所述线芯，令材料包覆住所述线芯，且确保线芯是处在材料的中央的，此时得到线芯棒；
2)将线芯棒穿入到第二挤棒机的挤压腔内并从第二挤棒机的挤出口穿出，同时还将若干根金属线也穿入到第二挤棒机的挤压腔内并从第二挤棒机的挤出口穿出；在第二挤棒机挤出材料的同时，同步地牵引所述线芯棒及各金属线，一方面确保各根金属线互不接触且均匀地分布在线芯棒的外周，另一方面确保第二挤棒机挤出的材料包覆住所述线芯棒和各金属丝，此时得到双层棒；
3)后续将双层棒截断成所需的长度即得到电磁介质颗粒；
所述的第一挤棒机和第二挤棒机是发泡材料挤棒机。
9.如权利要求8所述的电磁介质颗粒生产方法，其特征是：第一挤棒机和第二挤棒机所用的材料为EPE珍珠棉或EPS或EVA材料。
10.如权利要求8所述的电磁介质颗粒生产方法，其特征是：所述线芯棒的横截面的轮廓形状是圆形或者正多边形；所述双层棒的横截面的轮廓形状是圆形或者正多边形。
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