阅读说明：本技术 一种高频高速信号传输射频同轴电缆及其生产方法 (High-frequency high-speed signal transmission radio frequency coaxial cable and production method thereof ) 是由 汤晓楠 于 2020-04-16 设计创作，主要内容包括：本发明涉及的一种高频高速信号传输射频同轴电缆,其特征在于从内至外依次包含内导体层、绝缘层、粘性层、外导体层以及护套层,所述粘性层为胶水层。本发明一种高频高速信号传输射频同轴电缆及其生产方法具有保证生产效率,确保外导体层与绝缘层贴合紧密并且贴合平整均匀,保证传输速率的优点。(The invention relates to a high-frequency high-speed signal transmission radio frequency coaxial cable which is characterized by sequentially comprising an inner conductor layer, an insulating layer, a viscous layer, an outer conductor layer and a sheath layer from inside to outside, wherein the viscous layer is a glue layer. The high-frequency high-speed signal transmission radio frequency coaxial cable and the production method thereof have the advantages of ensuring the production efficiency, ensuring the tight and smooth and uniform fit of the outer conductor layer and the insulating layer and ensuring the transmission rate.)

1. The high-frequency high-speed signal transmission radio frequency coaxial cable is characterized by sequentially comprising an inner conductor layer, an insulating layer, a viscous layer, an outer conductor layer and a sheath layer from inside to outside, wherein the viscous layer is a glue layer.

2. A high frequency high speed signal transmission radio frequency coaxial cable according to claim 1, wherein the melting point of the adhesive layer is 80 to 180 ℃.

3. The high-frequency high-speed signal transmission radio-frequency coaxial cable according to claim 1, wherein the outer conductor layer is formed by winding, lapping or weaving, a small gap or a staggered height difference is formed when the outer conductor layer is formed by winding, lapping or weaving, and the adhesive layer partially fills the small gap or the staggered height difference of the outer conductor layer.

4. The high-frequency high-speed signal transmission radio-frequency coaxial cable according to claim 1, characterized in that a production method of the high-frequency high-speed signal transmission radio-frequency coaxial cable comprises:

the method comprises the steps of firstly extruding an insulating layer outside an inner conductor layer to form a first intermediate product, then dipping the first intermediate product in glue and cooling and drying the product, forming a viscous layer with an even surface on the outer surface of the insulating layer, then arranging an outer conductor layer on the surface of the viscous layer to form a second intermediate product, forming the outer conductor layer in a winding, wrapping or weaving mode, and finally extruding a sheath layer on the outer surface of the outer conductor layer.

5. The high-frequency high-speed signal transmission radio-frequency coaxial cable according to claim 4, wherein if the temperature of the sheath layer after heat is conducted to the viscous layer is not enough to melt the viscous layer when the sheath layer is extruded, a preheating step is added before the sheath layer is extruded, the second intermediate product passes through the oven, heat generated by the oven directly penetrates through the outer conductor layer, the viscous layer is melted, and the insulating layer and the outer conductor layer are firmly bonded by the viscous layer.

6. The high-frequency high-speed signal transmission radio-frequency coaxial cable according to claim 4, wherein the adhesive layer is EVA (ethylene vinyl acetate) with trademark of E180F;

and dipping the first intermediate product in glue, cooling and drying at the temperature of 25 ℃ for 15 seconds, wherein the material of the sheath layer is FEP, the temperature range of an extruder is 250-380 ℃, and the adhesive layer is sufficiently hot-melted when the sheath layer is extruded, so that the adhesive layer firmly bonds the insulating layer and the outer conductor layer.

7. The high-frequency high-speed signal transmission radio frequency coaxial cable according to claim 4, wherein the adhesive layer is EVA with a grade of L G EVA EA28400, and the melting point is 68 ℃;

first intermediate product gumming and cooling drying, cooling drying's temperature 20 degrees centigrade, the time is 18 seconds, the jacket layer material is PVC, extruder temperature range is 80-150 degrees centigrade, when extruding the jacket layer, the temperature is not enough to make the viscous layer hot melt behind the jacket layer heat conduction to the viscous layer, increase the preheating step before extruding the jacket layer, second intermediate product passes through the oven, the oven is set for the temperature to be 150 degrees centigrade, preheating time is 5 seconds, the heat that the oven produced directly sees through the outer conductor layer, make the viscous layer hot melt, the viscous layer bonds insulating layer and outer conductor layer firmly.

8. The high-frequency high-speed signal transmission radio-frequency coaxial cable according to claim 4, wherein the adhesive layer is PA, the PA being under the designation 8063;

and dipping the first intermediate product in glue, cooling and drying at the temperature of 25 ℃ for 15 seconds, wherein the material of the sheath layer is FEP, the temperature range of an extruder is 250-380 ℃, and the adhesive layer is sufficiently hot-melted when the sheath layer is extruded, so that the adhesive layer firmly bonds the insulating layer and the outer conductor layer.

9. The high-frequency high-speed signal transmission radio-frequency coaxial cable according to claim 4, wherein the adhesive layer is PA, and the PA brand is PA 61T-130;

the first intermediate product is subjected to gum dipping and cooling drying, the temperature of the cooling drying is 25 ℃, the time is 15 seconds, the material of the sheath layer is PVC, the temperature range of an extruder is 100-160 ℃, the temperature after the heat of the sheath layer is conducted to the viscous layer is not high enough to enable the viscous layer to be hot-melted when the sheath layer is extruded, a preheating step is added before the sheath layer is extruded, the second intermediate product passes through an oven, the set temperature of the oven is 200 ℃, the preheating time is 5 seconds, the heat generated by the oven directly penetrates through the outer conductor layer, the viscous layer is hot-melted, and the insulating layer and the outer conductor layer are firmly bonded by the viscous layer.

Technical Field

The invention relates to a high-frequency high-speed signal transmission radio frequency coaxial cable and a production method thereof.

Background

Radio frequency coaxial cable is a generic term for cables that transmit signals or capabilities in the radio frequency range. The antenna feeder is mainly used for antenna feeders of radio transmitting or receiving equipment and various communication and internal connection lines or interconnection lines of electronic equipment. A conventional coaxial line is composed of an inner conductor layer, an insulating layer, a shielding layer, and a sheath layer. Wherein the shielding layer is a wound metal wire. Because the winding is finished after the insulation extrusion, mutual sliding exists between the winding and the insulation layer, the structural stability of the wire is influenced, and reflection attenuation during high-frequency and high-speed signal transmission is caused. Meanwhile, due to the unstable structure, before the wire rod is connected with the connector in the wire rod processing process, the sheath layer needs to be peeled off, which can cause the outer conductor structure of the peeling section to be damaged, and cause the characteristic impedance deviation of the wire rod, and cause the section to generate larger reflection attenuation. For this reason, it is important to find a coaxial cable more suitable for high-frequency and high-speed signal transmission.

A high-frequency high-speed signal transmission radio frequency coaxial cable with patent number 201920218030.8, which comprises an inner conductor layer, an insulating layer, a viscous layer, an outer conductor layer and a sheath layer from inside to outside in sequence; the adhesive layer is adhesive Mylar with an adhesive surface facing the outer conductor layer, and the outer conductor layer is a wound metal wire layer. Wherein the outer conductor wire is formed into a more stable structure by the viscosity of the viscous mylar. However, such a high-frequency and high-speed signal transmission radio-frequency coaxial cable has two disadvantages due to the need of wrapping adhesive mylar:

firstly, the production efficiency of wrapping operation is low;

secondly, partial lamination can be formed on the surface of the Mylar in the wrapping process, so that the surface is uneven, the outer conductor layer and the insulating layer are adhered unevenly, and the product quality is influenced;

third, the PET mylar layer can reduce transmission rates due to its thickness.

Therefore, it is important to find a high-frequency high-speed signal transmission radio frequency coaxial cable and a production method thereof which ensure production efficiency, ensure that the outer conductor layer and the insulating layer are tightly attached and are smoothly and uniformly attached, and ensure transmission rate.

Disclosure of Invention

The invention aims to overcome the defects and provide a high-frequency high-speed signal transmission radio frequency coaxial cable and a production method thereof, wherein the production efficiency is ensured, the outer conductor layer and the insulating layer are tightly and flatly and uniformly attached, and the transmission rate is ensured.

The purpose of the invention is realized as follows:

the high-frequency high-speed signal transmission radio frequency coaxial cable is characterized by sequentially comprising an inner conductor layer, an insulating layer, a viscous layer, an outer conductor layer and a sheath layer from inside to outside, wherein the viscous layer is a glue layer.

Preferably, the melting point of the adhesive layer is 80-180 degrees Celsius.

Preferably, the outer conductor layer is formed by winding, wrapping or weaving, a minute gap or a staggered height difference is formed when the outer conductor layer is formed by winding, wrapping or weaving, and the adhesive layer partially fills the minute gap or the staggered height difference of the outer conductor layer.

Preferably, the production method of the high-frequency high-speed signal transmission radio-frequency coaxial cable comprises the following steps:

the method comprises the steps of firstly extruding an insulating layer outside an inner conductor layer to form a first intermediate product, then dipping the first intermediate product in glue and cooling and drying the product, forming a viscous layer with an even surface on the outer surface of the insulating layer, then arranging an outer conductor layer on the surface of the viscous layer to form a second intermediate product, forming the outer conductor layer in a winding, wrapping or weaving mode, and finally extruding a sheath layer on the outer surface of the outer conductor layer.

As a preference, if the temperature is not enough to make the viscous layer hot melt after the sheath layer heat is conducted to the viscous layer when extruding the sheath layer, then increase the preheating step before extruding the sheath layer, the second intermediate product passes through the oven, and the heat that the oven produced directly sees through the outer conductor layer for the viscous layer hot melt, the viscous layer is with insulating layer and outer conductor layer bonding firm.

Preferably, the adhesive layer is EVA, and EVA is trade mark E180F, samsung, korea;

the first intermediate product is subjected to gum dipping and cooling drying, the temperature of the cooling drying is 25 ℃, the time is 15 seconds, the material of the sheath layer is FEP, the temperature range of an extruder is 250-380 ℃, and when the sheath layer is extruded, the viscous layer is sufficiently hot-melted, so that the viscous layer firmly bonds the insulating layer and the outer conductor layer;

preferably, the adhesive layer is EVA, the EVA grade is L G EVA EA28400, and the melting point is 68 ℃;

first intermediate product gumming and cooling drying, cooling drying's temperature 20 degrees centigrade, the time is 18 seconds, the jacket layer material is PVC, extruder temperature range is 80-150 degrees centigrade, when extruding the jacket layer, the temperature is not enough to make the viscous layer hot melt behind the jacket layer heat conduction to the viscous layer, increase the preheating step before extruding the jacket layer, second intermediate product passes through the oven, the oven is set for the temperature to be 150 degrees centigrade, preheating time is 5 seconds, the heat that the oven produced directly sees through the outer conductor layer, make the viscous layer hot melt, the viscous layer bonds insulating layer and outer conductor layer firmly.

Preferably, the adhesive layer is PA, which is available under the designation 8063;

the first intermediate product is subjected to gum dipping and cooling drying, the temperature of the cooling drying is 25 ℃, the time is 15 seconds, the material of the sheath layer is FEP, the temperature range of an extruder is 250-380 ℃, and when the sheath layer is extruded, the viscous layer is sufficiently hot-melted, so that the viscous layer firmly bonds the insulating layer and the outer conductor layer;

preferably, the adhesive layer is PA, and the PA is PA 61T-130;

the first intermediate product is subjected to gum dipping and cooling drying, the temperature of the cooling drying is 25 ℃, the time is 15 seconds, the material of the sheath layer is PVC, the temperature range of an extruder is 100-160 ℃, the temperature after the heat of the sheath layer is conducted to the viscous layer is not high enough to enable the viscous layer to be hot-melted when the sheath layer is extruded, a preheating step is added before the sheath layer is extruded, the second intermediate product passes through an oven, the set temperature of the oven is 200 ℃, the preheating time is 5 seconds, the heat generated by the oven directly penetrates through the outer conductor layer, the viscous layer is hot-melted, and the insulating layer and the outer conductor layer are firmly bonded by the viscous layer.

Compared with the prior art, the invention has the beneficial effects that:

the high-frequency high-speed signal transmission radio frequency coaxial cable and the production method thereof have the advantages of ensuring the production efficiency, ensuring the tight and smooth and uniform fit of the outer conductor layer and the insulating layer and ensuring the transmission rate.

Drawings

Fig. 1 is a schematic structural diagram of a high-frequency high-speed signal transmission radio frequency coaxial cable.

Wherein:

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the high-frequency high-speed signal transmission radio frequency coaxial cable according to the present invention sequentially includes, from inside to outside, an inner conductor layer 1, an insulating layer 2, an adhesive layer 3, an outer conductor layer 4, and a sheath layer 5, where the adhesive layer is a glue layer. The melting point of the adhesive layer is 80-180 ℃.

A production method of a high-frequency high-speed signal transmission radio frequency coaxial cable comprises the following steps:

the method comprises the steps of firstly extruding an insulating layer outside an inner conductor layer to form a first intermediate product, then dipping the first intermediate product in glue and cooling and drying the product, forming a viscous layer with an even surface on the outer surface of the insulating layer, then arranging an outer conductor layer on the surface of the viscous layer to form a second intermediate product, forming the outer conductor layer in a winding, wrapping or weaving mode, and finally extruding a sheath layer on the outer surface of the outer conductor layer. When the outer conductor layer is formed in a winding, lapping or weaving mode, a tiny gap is formed or a staggered height drop exists.

When extruding the restrictive coating, because the heat that restrictive coating self carried is higher, if the heat conduction is higher than the melting point of viscous layer to viscous layer after temperature, then with viscous layer hot melt, the viscous layer is firm with insulating layer and outer conductor layer bonding this moment. The adhesive layer is filled in the tiny gaps of the outer conductor layer or the staggered height difference after hot melting, so that the integrity is stronger.

If when extruding the restrictive coating, the temperature is not enough to make the viscous layer hot melt behind the restrictive coating heat conduction to the viscous layer, increases the preheating step before extruding the restrictive coating so, and article in the middle of the second pass through the oven, and the heat that the oven produced directly sees through the outer conductor layer for the viscous layer hot melt, the viscous layer is firm with insulating layer and outer conductor layer bonding.