FOAMED DIELECTRIC MATERIAL AND PRODUCTION METHOD THEREOF

Abstract

The present disclosure discloses a foamed dielectric material, which is used to solve the problems of low production efficiency and high production cost of foamed dielectric materials at present. The foamed dielectric material is a cylinder structure or a tube structure formed by a foamed material after foaming; a plurality of gaps are cut on the surface of the cylinder structure or the tube structure, and the gap has a metal wire segment inside; and the metal wire segment in different gaps is not in contact with each other. The foamed dielectric material with such structure has the advantages such as a simple structure, an accurately controllable dielectric constant, light weight per unit volume, easy to efficiently product and stable technical index. The present disclosure further discloses a production method which may be used for producing the foamed dielectric material. In the production method, firstly a foamed rod-shaped part or a tubular part is passed through a slitting device, and passed through a buried wire device, and then truncated into a required length. The production method has the advantages such as high production efficiency, low cost, light weight and easy to control the dielectric characteristic.

Claims

1. A foamed dielectric material, wherein the foamed dielectric material is a cylinder structure or a tube structure formed by a foamed material after foaming; a plurality of gaps are cut on an outer surface of the cylinder structure or the tube structure, and each gap has a metal wire segment inside; and the metal wire segments in different gaps are not in contact with each other.

2. The foamed dielectric material of claim 1, wherein the foamed material is selected from the group consisting of EPE pearl cotton, EPS, and EVA.

3. The foamed dielectric material of claim 1, wherein a moving direction of at least one of the metal wire segment is along a longitudinal direction of the cylinder structure or the tube structure or spiraling around the cylinder structure or the tube structure.

4. The foamed dielectric material of claim 1, wherein the metal wire segment-arg regularly and evenly distributed.

5. The foamed dielectric material of claim 1, wherein the number of the metal wire segment is in a range of 2 to 8, and the diameter of at least one metal wire segment is in a range of 0.01-0.5 mm.

6. The foamed dielectric material of claim 1, wherein a peripheral contour shape of a cross section of the cylinder structure or the tube structure is circular or regular polygonal.

7. The foamed dielectric material of claim 1, wherein a peripheral contour shape of a cross section of the cylinder structure or the tube structure does not exceed a range of a circle radius of 20 mm.

8. A method for producing the foamed dielectric material, comprising: 1) passing a foamed rod-shaped part or a tubular part through a slitting device, and as the rod-shaped part or the tubular part is passing through the slitting device, using the slitting device to cut a plurality of gaps on an outer surface of the rod-shaped part or the tubular part to obtain a rod-shaped part or a tubular part with a cut gap; 2) passing the rod-shaped part or the tubular part with a gap through a buried wire device, and as the rod-shaped part or the tubular part with a gap is passing through the buried wire device, using the buried wire device to embed a metal wire into the gap to obtain a buried wire rod or a buried wire tube; and 3) subsequently, truncating the buried wire rod or the buried wire tube to a required length to obtain the foamed dielectric material.

9. The production method of claim 8, wherein after step 2), a surface coating or surface hot melting step is added to fix the metal wire to the rod-shaped part or the tubular part together.

10. The production method of claim 8, wherein the buried wire rod or the buried wire tube is truncated into a same length at a fixed-length before step 3), or is integrally wound into a wire coil before step 3).

11. The foamed dielectric material of claim 3, wherein the metal wire segments are regularly and evenly distributed.

12. The foamed dielectric material of claim 5, wherein a peripheral contour shape of a cross section of the cylinder structure or the tube structure is circular or regular polygonal

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG. 1 is a schematic diagram of the front view structure of the foamed dielectric material in Example 1.

[0030] FIG. 2 is a schematic diagram of the A-A section view structure of FIG. 1.

[0031] FIG. 3 is a schematic diagram of the front view structure of the foamed dielectric material in Example 2.

[0032] FIG. 4 is a schematic diagram of the B-B section view structure of FIG. 3.

[0033] FIG. 5 is a schematic diagram of the front view structure of the slitting device in Example 3.

[0034] FIG. 6 is a schematic diagram of the C-C section view structure of FIG. 5.

[0035] FIG. 7 is a schematic diagram of the front view structure of the buried wire device in Example 3.

[0036] FIG. 8 is a schematic diagram of the D-D section view structure of FIG. 7.

[0037] FIG. 9 is a working schematic diagram of the buried wire device in Example 3.

[0038] The description of the reference numbers. 1—foamed dielectric material; 11—gap; 12—metal wire segment; 2—foamed dielectric material; 21—gap; 22—metal wire segment; 23—square hole; 3—slitting device; 31—knife rest; 32—through hole; 33—blade; 4—buried wire device; 41—lead arm fixing frame; 42—feeding hole; 43—lead arm; 44—pressing wire end; 45—lead wire hole; 46—metal wire.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The the present disclosure will be further illustrated below with reference to the examples.

Example 1

[0040] This example is an illustration of the structure of the foamed dielectric material according to the present disclosure.

[0041] As shown in FIG. 1 and FIG. 2, the foamed dielectric material 1 in this example has a cylindrical structure. There are four gaps 11 along the longitudinal direction of the cylindrical structure cut on the side surface of the cylindrical structure. Each gap 11 has a metal wire segment 12 inside, and the metal wire segment 12 in different gaps 11 is not in contact with each other. In this example, the four gaps 11 are evenly distributed on the side surface of the cylinder structure. Because the moving direction of the gaps 11 is along the longitudinal direction of the cylinder structure and does not cross with each other, the moving direction of the metal wire segment 12 in the gap 11 is also in the longitudinal direction of the cylinder structure and does not in contact with each other.

[0042] In this example, the diameter D1 of the bottom surface of the cylindrical structure of the foamed dielectric material 1 is 5 mm, and the height H1 of the cylindrical structure of the foamed dielectric material 1 is also 5 mm.

[0043] The material of the cylinder structure in this example is EPE pearl cotton, that is, polyethylene foamed cotton.

Example 2

[0044] The example is another illustration of the structure of the foamed dielectric material according to the present disclosure.

[0045] As shown in FIG. 3 and FIG. 4, the foamed dielectric material 2 in this example has a tube structure. There are four gaps 21 along the longitudinal direction of the tube structure cut on the side surface of the tube structure. Each gap 21 has a metal wire segment 22 inside, and the metal wire segments 22 in different gaps 21 is not in contact with each other. In this example, the four gaps 21 are evenly distributed on the side surface of the tube structure. Because the moving direction of the gaps 21 is along the longitudinal direction of the tube structure and does not cross each other, the moving direction of the metal wire segment 22 in the gap 21 is also in the longitudinal direction of the tube structure and does not in contact with each other.

[0046] In this example, the outer diameter D2 of the bottom surface of the tube structure of the foamed dielectric material 2 is 8 mm, and the height H2 of the tube structure is 6 mm. The inner hole is a square hole 23, and the diameter D3 of the circumscribed circle of the bottom surface of the square hole 23 is 0.625 times the outer diameter D2 of the bottom surface, that is, 5 mm. The four metal wire segments 22 each correspond to the four bottom edges of the square hole 23, and directly opposite the middle of these bottom edges.

[0047] The material of the tube structure in this example is EPE pearl cotton, that is, polyethylene foamed cotton.

Example 3

[0048] This example is an illustration of the production method of the foamed dielectric material according to the present disclosure.

[0049] 1) A foamed rod-shaped part with a diameter of 5 mm was passed through a slitting device 3. As shown in FIG. 5, the slitting device 3 in this example comprises a knife rest 31, wherein a through hole 32 is formed on the knife rest 31, and four blades 33 are fixed on the knife rest 31, and they are 900 to each other on a circumference. The cutting edges of the blades 33 are extended into the through hole 32. As the rod-shaped part passed through the slitting device 3 via the through holes 32, the slitting device 3 correspondingly cut four gaps on the surface of the rod-shaped part. Because the rod-shaped part only moved linearly along its own central axis, the moving direction of the four gaps cut on its surface naturally along the longitudinal direction of the rod-shaped part.

[0050] 2) The rod-shaped part with a gap was passed through a buried wire device 4. As shown in FIG. 6, the buried wire device 4 in this example comprises a lead arm fixing frame 41, and the lead arm fixing frame 41 is provided with a feeding hole 42, and four lead arms 43 are fixed on the lead arm fixing frame 41, and they are 90° to each other on a circumference. The pressing wire end 44 of the lead arms 43 are extended into the feeding hole 42. The lead arm fixing frame 41 is further provided with a plurality of lead holes 45 for limiting the position of a metal wire 46 and guiding the direction of the metal wire 46. Each lead hole 45 is correspondingly located near one lead arm 43. As the rod-shaped part passed through the buried wire device 4 via the feeding hole 42, each gap of the rod-shaped part had to be temporarily opened by the pressing wire end 44 of the corresponding lead arm 43, while being buried in the metal wire 46 at the same time, and then naturally closed, obtaining the buried wire rod. The metal wire 46 of this example was put roll by four wire coils at the same time.

[0051] 3) Subsequently, the buried wire rod was truncated into a cylindrical structure with a height of 5 mm with a fixed-length cutting machine, obtaining the foamed dielectric material with the structure described in example 1.

[0052] It should be noted that the rod-shaped part may have a short length, for example, with a length of 6 meters, before step 1), or may be integrally wound into a wire coil before step 1).

[0053] Similarly, if the rod-shaped part was integrally wound into a wire coil before step 1), the rod-shaped part with a gap obtained after step 1) may be truncated into a shorter length with a fixed-length cutting machine, for example, with a length of 6 meters, and then go to step 2), or directly go to step 2).

Example 4

[0054] This example is another illustration of the production method of the foamed dielectric material according to the present disclosure.

[0055] The difference between this example and example 3 is that after obtaining the buried wire rod, a surface coating treatment or a surface hot melting treatment is also carried out to prevent the metal wire from falling off by itself from the gap.

[0056] The above examples in the specification are merely the description of the preferred embodiments of the present disclosure. Without departing from the working principle and idea of the present disclosure, the equivalent technical transformation should be regarded as the protection scope of the present disclosure.