CN104795184A

CN104795184A - Cable production technology

Info

Publication number: CN104795184A
Application number: CN201510167733.9A
Authority: CN
Inventors: 李丽娟; 王建武
Original assignee: ZHONGSHAN HONGCHENG RESEARCH TECHNICAL SERVICES Co Ltd
Current assignee: ZHONGSHAN HONGCHENG RESEARCH TECHNICAL SERVICES Co Ltd
Priority date: 2015-04-10
Filing date: 2015-04-10
Publication date: 2015-07-22

Abstract

The invention discloses a cable production technology. The cable production technology includes the following steps of 1), monofilament drawing; 2), monofilament annealing; 3), stranding; 4), cabling; 5), wrapping. The cable production technology is reasonable and concise, cables are corrosion resistant, antioxidant, long in service life and applicable to various severe environments, electric leakage never occurs, and safety performance is high.

Description

A kind of cable manufacturing process

Technical field

The present invention relates to cable production art, particularly a kind of cable manufacturing process.

Background technology

The production technology of the insulating barrier of cable and oversheath routine adopts insulation extrusion molding/wrapped and sheath to extrude technique, and its production technology is comparatively complicated, and production process is restive, spillage of material and the defect such as equipment investment is larger.Production technology comparatively complexity and its reason restive is, technique under conventional is that exotic material such as the polytetrafluoroethylene that insulation and sheath extrude needs high temperature extrusion production line, complex manufacturing is wayward, and produce more difficult for larger-diameter cable, the large diameter cable pliability of extrusion molding production is simultaneously poor.

In addition, China Patent No. is: 201010168058.9 disclose this one can be used for video monitoring circuit, broadcast singal controls, public TV antenna, radio communication, transmission system and the unidirectional novel radio-frequency coaxial cable of control distribution and the patent of invention of production method thereof, it comprises copper core conductor, polyethylene layer is coated with successively outside described copper core conductor, aluminium foil wheat draws layer, naked copper braid and polyvinyl chloride coating, the invention has the beneficial effects as follows: by conventional radio frequency coaxial outer pvc sheath formula and and carry out improving and optimize to its extrusion process, enhance the wear-resisting lubricating ability of cable thus reduce to intert and connect up, electric wire interspersed pull-out difficulty during intensive wiring, the problem that cable cover(ing) is impaired.But its complex manufacturing, production process is wayward, and product cost is too high.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of cable manufacturing process, to solve the above-mentioned multinomial defect caused in prior art.

For achieving the above object, the invention provides following technical scheme: a kind of cable manufacturing process, is characterized in that: comprise the following steps:

1) monofilament draws, and under the condition of 40--55 DEG C, utilizes wire drawing machine, stretched mould, and stretched by copper pole stock, the diameter of wire drawing is 0.5-1mm;

2) monofilament annealing, is annealed by annealing furnace, annealing temperature 650-680 DEG C, and annealing time 40-60 minute, makes monofilament;

3) strand system, uses 5 monofilament to carry out multiple strand with one heart and forms conductor wire core, adopt compacting machine to press wire;

4) 4 conductor wire cores employings are carried out strand system without back twist mode and are made cable, carry out colligation to the cable after stranding by stranding;

5) coated, coated insulation layer outside cable, thickness of insulating layer is 1-2mm.

Preferably, in described step 1), draw temperature is 38 DEG C.

Preferably, described step 2) in, annealing temperature is 635 DEG C, and annealing time is 52 minutes.

Preferably, in described step 5), the inner side of insulating barrier is provided with sheath, and sheath comprises and extrudes sheath and wrapped sheath.

Preferably, in described step 5), the outside of insulating barrier is provided with oversheath, and oversheath is directly extruded by plastic extruding machine and forms.

Preferably, in described step 5), while coated between wire and insulating barrier fill material, this material is polypropylene tape or nonwoven fabrics.

The beneficial effect of above technical scheme is adopted to be: copper pole stock at normal temperatures, wire drawing machine is utilized to pass through together or the nib of several drawing die, make the reduction of its cross section, length increases, intensity improves, the first working procedure of wire drawing Shi Ge electric wire company, the main technologic parameters of wire drawing joins mould technology; Annealing operation key is the oxidation of stopping copper wire, and copper monofilament is being heated at certain temperature, improves the toughness of monofilament in the mode of recrystallization, reduces the intensity of monofilament, to meet the requirement of electric wire to conductor wire core; In order to improve the pliability of electric wire, so that laying installation, conductor wire core is taked multifilament stranded and becomes the area occupied reducing wire, the physical dimension reducing cable, adopt while stranded conductor and press form, make typical circular make a variation as semicircle, fan-shaped, watt shape and the circle of pressing; For the cable of multicore in order to ensure forming degree, reduce the profile of cable, generally all need it stranded for circular.Stranded mechanism and conductor twist to be made similar, and because strand pitch diameter processed is comparatively large, employing is without back twist mode mostly, the technical requirement of stranding: stop allotype insulation core and stand up and cause the twist and warping of cable; Prevent insulating barrier to be scratched, most of cable completing with two other operation while stranding: one is fill, after guarantee stranding, the rounding of cable is with stable; One is colligation, ensures that cable core is not loose; Sheath is not scratched to protect insulated wire cores, need to carry out suitable protection to insulating barrier, sheath divides: extrude sheath (separation sleeve) and wrapped sheath (bed course), and wrapped bed course replaces binding strap and cabling procedure synchronously to carry out; Oversheath is the structure division that the insulating barrier of protection electric wire prevents environmental factor from corroding; the Main Function of oversheath is the ability such as mechanical strength, the protection against the tide of anti-chemical burn into, waterproof people, prevention cable fire improving electric wire, requires to utilize plastic extruding machine directly to extrude plastic protective according to the difference of cable.

Embodiment

The following detailed description of the preferred embodiment of the present invention.

embodiment 1:a kind of cable manufacturing process, is characterized in that: comprise the following steps:

1) monofilament draws, and under the condition of 38 DEG C, utilizes wire drawing machine, stretched mould, and stretched by copper pole stock, the diameter of wire drawing is 0.5mm;

2) monofilament annealing, is annealed by annealing furnace, annealing temperature 675 DEG C, and annealing time 52 minutes, makes monofilament;

5) coated, coated insulation layer outside cable, thickness of insulating layer is 1mm, the inner side of insulating barrier is provided with sheath, sheath comprises and extrudes sheath and wrapped sheath, and the outside of insulating barrier is provided with oversheath, and oversheath is directly extruded by plastic extruding machine and forms, while coated between wire and insulating barrier fill material, this material is polypropylene tape or nonwoven fabrics.

embodiment 2:all the other are identical with embodiment 1, and difference is, in step 1), the temperature that monofilament draws is 40 degrees Celsius, and the diameter of wire drawing is 0.7mm, step 2) in, annealing temperature is 650 DEG C, and annealing time is 40 minutes, in step 5), and the thickness of insulating barrier is 1.5mm.

embodiment 3:all the other are identical with embodiment 1, and difference is, in step 1), the temperature that monofilament draws is 55 degrees Celsius, and the diameter of wire drawing is 1mm, step 2) in, annealing temperature is 680 DEG C, and annealing time is 60 minutes, in step 5), and the thickness of insulating barrier is 2mm.

After above processing step, take out cable sample, performance is as follows after testing:

In above-mentioned three embodiments, under room temperature condition, this cable work 1h, line temperature is 20 DEG C, and after 10h, line temperature is 25 DEG C, generic coaxial cable work 1h, and line temperature is 35 DEG C, and after 10h, line temperature is 55 DEG C, and this coaxial cable radiating effect is better; Carry out curling experiment to coaxial cable, this coaxial cable bending angle is respectively 15 °, 40 °, 20 °, and generic coaxial cable bend angle >55 °, the curling oversheath that occurs afterwards for 20 times is damaged; With sparking machine burning coaxial cable, burn after this coaxial cable 3min, namely generic coaxial cable 1min catches fire.

Above-described is only the preferred embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, and without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.

Claims

1. a cable manufacturing process, is characterized in that: comprise the following steps:

Monofilament draws, and under the condition of 40--55 DEG C, utilizes wire drawing machine, stretched mould, and stretched by copper pole stock, the diameter of wire drawing is 0.5-1mm;

Monofilament is annealed, and is annealed by annealing furnace, annealing temperature 650-680 DEG C, and annealing time 40-60 minute, makes monofilament;

Strand system, uses 5 monofilament to carry out multiple strand with one heart and forms conductor wire core, adopt compacting machine to press wire;

4 conductor wire cores employings are carried out strand system without back twist mode and are made cable, carry out colligation to the cable after stranding by stranding;

Coated, coated insulation layer outside cable, thickness of insulating layer is 1-2mm.

2. cable manufacturing process according to claim 1, is characterized in that: in described step 1), and draw temperature is 38 DEG C.

3. cable manufacturing process according to claim 1, is characterized in that: described step 2) in, annealing temperature is 535 DEG C, and annealing time is 52 minutes.

4. cable manufacturing process according to claim 1, is characterized in that: in described step 5), and the inner side of insulating barrier is provided with sheath, and sheath comprises and extrudes sheath and wrapped sheath.

5. cable manufacturing process according to claim 1, is characterized in that: in described step 5), and the outside of insulating barrier is provided with oversheath, and oversheath is directly extruded by plastic extruding machine and forms.

6. cable manufacturing process according to claim 1, is characterized in that: in described step 5), while coated between wire and insulating barrier fill material, this material is polypropylene tape or nonwoven fabrics.