CN105489315A - Production technology of low-smoke, halogen-free and flame-retardant CAT5E network cable - Google Patents
Production technology of low-smoke, halogen-free and flame-retardant CAT5E network cable Download PDFInfo
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- CN105489315A CN105489315A CN201511014699.8A CN201511014699A CN105489315A CN 105489315 A CN105489315 A CN 105489315A CN 201511014699 A CN201511014699 A CN 201511014699A CN 105489315 A CN105489315 A CN 105489315A
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- retardant
- low
- flame
- production technology
- smoke
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
Abstract
The invention relates to a production technology of a low-smoke, halogen-free and flame-retardant CAT5E network cable. The production technology comprises the following steps: drawing a copper wire; preheating a conductor; extruding a polytetrafluoroethylene insulating layer from the preheated copper wire through a fluorine plastic extruder to prepare insulated core wires; cooling the insulated core wires and carrying out online performance test; twisting the insulated core wires into pairs; stranding the insulated core wires into a cable; extruding the cabled core wire, a nylon rope and a low-smoke flame-retardant polyolefin sheath material through a 65-type twin-screw extruder to form the network cable; and crossly winding the network cable into a circle for package. The preparation technology is easy to control and achieve; the operation is simple; the CAT5E network cable prepared by the production technology has excellent mechanical stretch resistance and low-voltage, halogen-free and flame-retardant properties and long service lifetime; and the electrical property parameters of the network cable conform to or even partially exceed the specified standards of the CAT5E network cable.
Description
Technical field
The present invention relates to a kind of production technology of grid line, specifically a kind of low-smoke non-halogen flame-retardant surpasses the production technology of five class grid lines.
Background technology
At present, along with the continuous growth of the network user, the use amount of commercial office building wiring is being on the increase, which results in ceiling or underfloor communication cable and get more and more, therefore, do five classes of communication cable for conventional and surpass the requirement that five class grid lines have low-smoke non-halogen flame-retardant.Relative to five class grid lines, there is better communication performance and advantage owing to surpassing five class grid lines, therefore surpass five class grid lines and there is the wide market space.In order to improve the fire protecting performance of structured wiring, in the standard of various countries, (CMP) Plenum rank all as or becoming the communication cable of the highest fire protecting performance rank.Plenum rank surpass five class grid lines due to the intensity of a fire can not at cable vertical spread, and cable jacket material must adopt high flame retardant, the material of low-smoke, the total amount of the compound therefore burnt is very limited, many ionic contaminations can not be produced, also can not damage digital electronic device, during burning, more can not discharge harmful gas.In order to meet the market demand grown to even greater heights surpassing five class grid lines of Plenum rank, be necessary to propose a kind of production technology being exclusively used in production low-smoke non-halogen flame-retardant and surpassing five class network circuits.
Summary of the invention
The object of the present invention is to provide a kind of production technology being exclusively used in production low-smoke non-halogen flame-retardant and surpassing five class grid lines, this production technology is easy to realize, easy to operate, can effectively ensure the basis that low-smoke non-halogen flame-retardant grid line possesses higher fire-protection rating also guarantees that grid line has good communication performance.
To achieve these goals, the technical solution used in the present invention is, a kind of low-smoke non-halogen flame-retardant surpasses the production technology of five class grid lines, and this production technology mainly comprises the following steps:
(1) adopt wire drawing machine to draw copper cash as the conductor of grid line, be 20-25% by the elongation control of copper cash during drawing, the copper cash drawn carries out the pre-heat treatment by being directly delivered in blast conductor preheater after copper wire diameter on-line computing model;
(2) polytetrafluoroethylene (PTFE) material is joined in the machine barrel of Fluoroplastic extruder and carry out plastifying fusion, and by the screw rod in machine barrel, PTFE melt is squeezed in extrusion die, adopt the copper core after active pay-off device pull-out preheating through the extrusion die of Fluoroplastic extruder, after extrusion die copper core by PTFE expect coated after become insulation core wire, insulation core wire to carry out marking after look control to adopt direct capacitance detector in water to carry out on-line monitoring water capacitance to insulation core wire after the movable warm water cooling bath of 40-60 DEG C and the cooling of cold water cooling revolution case through excess temperature successively through being arranged on the fluorine small-sized vitta extruder moulded on cross-head, insulation core wire adopts outer insulation diameter monitor and monitoring of eccentricity instrument to carry out the FEEDBACK CONTROL of outer insulation diameter to dried insulation core wire again after blowing-dryer drying,
(3) adopt active back-twist paying out machine to carry out back twist unwrapping wire to the insulation core wire that step 2 is made, back twist rate is 40-45%;
(4) twist making 4 pairs of lines all according to helical arrangement by the insulation core wire of pairing device to back twist unwrapping wire, in strand in process, twisting pitch controls at 15-20mm, and the speed of twisted wire is 50-60m/min;
(5) by two turn round formula cabler by strand to after insulation core wire carry out S to twisted synthesizing cable, and control at 130-150mm by laying up pitch, stranding speed is set to 40-50m/min;
(6) low-smoke flame-retardant polyolefin sheathed material is joined in the machine barrel of 65 type double screw extruders and carries out plastifying fusion after drying, and by the screw rod in machine barrel, melt is squeezed in extrusion die, adopt initiatively unwrapping wire and the actinobacillus device of Tension Adjustable carries out drawing jointly by the extrusion die of 65 type double screw extruders to becoming core and a nylon rope, low-smoke non-halogen flame-retardant grid line is become by low-smoke flame-retardant polyolefin sheathed material is coated again after becoming core first coated by nylon rope after extrusion die, this grid line is dry by blower fan again after movable temperature control cooling water groove and the cooling of fixing cold water cooling revolution case successively, eccentricity detecting instrument is adopted to carry out on-line checkingi to dried grid line,
(7) qualified after testing grid line carries out cross winding lopping packaging through storage line tension frame, take-up meter counter and cross network twin shaft coiler successively.
As a modification of the present invention, in order to ensure the constant of outer insulation diameter, described outer insulation diameter monitor adopts X-Y two-axis laser caliper, by each spot diameter of X-Y two-axis laser caliper rotation sweep insulation core wire circumference, after controller data process, FEEDBACK CONTROL insulation core wire extrudes external diameter.
As a modification of the present invention, the dielectric constant of described polytetrafluoroethylene (PTFE) material controls between 2.2-2.3.
As a modification of the present invention, described low-smoke flame-retardant polyolefin sheathed material adopts high density polyethylene (HDPE) (HDPE), ethylene-vinyl acetate copolymer (EVA) mixed system is base-material, with ethylene propylene diene rubber (EPDM), aluminium hydroxide and magnesium hydroxide for compound flame retardant, and by base-material and compound flame retardant admixed together add again conventional lubricant, antioxidant and processing aid first by extruder extruding pelletization and the 125 DEG C of crosslinkings with radiation accepting cobalt-60 γ radiation appliance after drying form.This low-smoke flame-retardant polyolefin sheathed material has higher oxygen index, excellent hot strength and elongation at break.
As a modification of the present invention, in process of production, the plasticization temperature of PTFE material is very important, temperature is too high, fluorine material easily decomposites fluorine gas, produces corrosiveness, and have impact to the useful life of extrusion equipment to the flame retardant coating of copper cash, therefore, found through experiments and the machine barrel on Fluoroplastic extruder is arranged scope to the temperature of extrusion die be 327-350 DEG C and be advisable.
As a modification of the present invention, described 65 type double screw extruders adopt centering extruder head, the mould that head is installed adopts half to squeeze tubular type, can ensure in extrusion like this, insulation core wire structure keeps its geometric position in whole grid line constant, thus effectively improve the concentricity of insulation core wire and sheath, guarantee that grid line entirety possesses good electric property.
Relative to prior art, advantage of the present invention is as follows, production technology adopts wire drawing-insulation tandem production, pair twist, stranding successively, extrudes the technological process of sheath and lopping packaging, and each independent operation is easy to control and realize, and cost is low and to produce the quality of grid line product of gained secure, by direct capacitance detector in water in production technology, X-Y two-axis laser caliper, monitoring of eccentricity instrument and high-precision controller are to the change of copper conductor diameter, the water capacitance of insulation core wire, the outer insulation diameter of insulation core wire, the concentricity of the concentricity and insulation core wire and sheath of extruding insulation core wire carries out accurate feedback control, and by setting-up eccentricity display instrument, electric induction is utilized to pop one's head at insulation core wire surface High Rotation Speed, the insulation thickness of scanning circumference surrounding changes and is shown on a display screen by eccentric degree, thus automated quality control is carried out to the whole production process of grid line, guarantee that grid line possesses high-quality performance, wherein, brass wire diameter change can be controlled in
+0.002mm, the outer insulation diameter change of insulation core wire can be controlled in
+within 0.003mm, the concentricity extruding insulation core wire can ensure more than 95%, grid line adopt PTFE material as copper conductor insulating barrier make heart yearn there is high temperature resistant, anticorrosion and anti-adhesion performance, thus grid line in use produces fire phenomenon due to self-heating can be effectively prevent, effectively enhance the fire retardancy of grid line, also be provided with one deck nylon rope between the insulation core wire of the grid line of this explained hereafter and outer sheath layer, its shielding properties can be strengthened, external jacket adopts with HDPE, EVA mixed system as base-material mixes with EPDM, aluminium hydroxide and magnesium hydroxide for the Flame-retardant low-smoke fire retardant polyolefin Insulation Material that compound flame retardant co-extrusion is standby has good low-smoke and flame retardant performance, oxygen index is higher, and flame retardant rating can reach FV-0 level, whole technique, by the accurate control to grid line extrusion technological parameter, can make the five class grid lines that surpass prepared have the electric transmission performance more excellent than common net winding thread, mechanical tensile property and stronger fire-retardant and refractory ability.
Embodiment
In order to deepen the understanding of the present invention and understanding, below in conjunction with embodiment, the invention will be further described and introduce.
Low-smoke non-halogen flame-retardant surpasses a production technology for five class grid lines, and this production technology mainly comprises the following steps:
(1) adopt wire drawing machine to draw copper cash as the conductor of grid line, be 20-25% by the elongation control of copper cash during drawing, the copper cash drawn carries out the pre-heat treatment by being directly delivered in blast conductor preheater after copper wire diameter on-line computing model;
(2) PTFE material of dielectric constant between 2.2-2.3 is joined in the machine barrel of Fluoroplastic extruder carry out plastifying fusion, and by the screw rod in machine barrel, PTFE melt is squeezed in extrusion die, adopt the copper core after active pay-off device pull-out preheating through the extrusion die of Fluoroplastic extruder, after extrusion die copper core by PTFE expect coated after become insulation core wire, insulation core wire to carry out marking after look control to adopt direct capacitance detector in water to carry out on-line monitoring water capacitance to insulation core wire after the movable warm water cooling bath of 40-60 DEG C and the cooling of cold water cooling revolution case through excess temperature successively through being arranged on the fluorine small-sized vitta extruder moulded on cross-head, insulation core wire adopts X-Y two-axis laser caliper and monitoring of eccentricity instrument to carry out the FEEDBACK CONTROL of outer insulation diameter to dried insulation core wire again after blowing-dryer drying,
(3) adopt active back-twist paying out machine to carry out back twist unwrapping wire to the insulation core wire that step 2 is made, back twist rate is 40-45%;
(4) twist making 4 pairs of lines all according to helical arrangement by the insulation core wire of pairing device to back twist unwrapping wire, in strand in process, twisting pitch controls at 15-20mm, and the speed of twisted wire is 50-60m/min;
(5) by two turn round formula cabler by strand to after insulation core wire carry out S to twisted synthesizing cable, and control at 130-150mm by laying up pitch, stranding speed is set to 40-50m/min;
(6) low-smoke flame-retardant polyolefin sheathed material is joined in the machine barrel of 65 type double screw extruders and carries out plastifying fusion after drying, and by the screw rod in machine barrel, melt is squeezed in extrusion die, adopt initiatively unwrapping wire and the actinobacillus device of Tension Adjustable carries out drawing jointly by the extrusion die of 65 type double screw extruders to becoming core and a nylon rope, low-smoke non-halogen flame-retardant grid line is become by low-smoke flame-retardant polyolefin sheathed material is coated again after becoming core first coated by nylon rope after extrusion die, this grid line is dry by blower fan again after movable temperature control cooling water groove and the cooling of fixing cold water cooling revolution case successively, eccentricity detecting instrument is adopted to carry out on-line checkingi to dried grid line,
(7) qualified after testing grid line carries out cross winding lopping packaging through storage line tension frame, take-up meter counter and cross network twin shaft coiler successively.
Wherein, described low-smoke flame-retardant polyolefin sheathed material adopts high density polyethylene (HDPE) (HDPE), ethylene-vinyl acetate copolymer (EVA) mixed system is base-material, with ethylene propylene diene rubber (EPDM), aluminium hydroxide and magnesium hydroxide for compound flame retardant, and by base-material and compound flame retardant admixed together add again conventional lubricant, antioxidant and processing aid first by extruder extruding pelletization and the 125 DEG C of crosslinkings with radiation accepting cobalt-60 γ radiation appliance after drying form.This low-smoke flame-retardant polyolefin sheathed material has higher oxygen index, excellent hot strength and elongation at break.
Described 65 type double screw extruders adopt centering extruder head, the mould that head is installed adopts half to squeeze tubular type, can ensure in extrusion like this, insulation core wire structure keeps its geometric position in whole grid line constant, thus effectively improve the concentricity of insulation core wire and sheath, guarantee that grid line entirety possesses good electric property.
In process of production, the plasticization temperature of PTFE material is very important, temperature is too high, fluorine material easily decomposites fluorine gas, corrosiveness is produced to the flame retardant coating of copper cash, and have impact to the useful life of extrusion equipment, therefore, found through experiments and the machine barrel on Fluoroplastic extruder is arranged scope to the temperature of extrusion die be 327-350 DEG C and be advisable.
It should be noted that above-mentioned execution mode, be not used for limiting protection scope of the present invention, equivalents done on the basis of technique scheme or the alternative scope all falling into the claims in the present invention and protect.In the claims, word " comprises " and does not get rid of existence and do not arrange element in the claims or step.
Claims (6)
1. low-smoke non-halogen flame-retardant surpasses a production technology for five class grid lines, it is characterized in that: this production technology comprises the following steps:
(1) adopt wire drawing machine to draw copper cash as the conductor of grid line, be 20-25% by the elongation control of copper cash during drawing, the copper cash drawn carries out the pre-heat treatment by being directly delivered in blast conductor preheater after copper wire diameter on-line computing model;
(2) PTFE material is joined in the machine barrel of Fluoroplastic extruder and carry out plastifying fusion, and by the screw rod in machine barrel, PTFE melt is squeezed in extrusion die, adopt the copper core after active pay-off device pull-out preheating through the extrusion die of Fluoroplastic extruder, after extrusion die copper core by PTFE expect coated after become insulation core wire, insulation core wire to carry out marking after look control to adopt direct capacitance detector in water to carry out on-line monitoring water capacitance to insulation core wire after the movable warm water cooling bath of 40-60 DEG C and the cooling of cold water cooling revolution case through excess temperature successively through being arranged on the fluorine small-sized vitta extruder moulded on cross-head, insulation core wire adopts outer insulation diameter monitor and monitoring of eccentricity instrument to carry out the FEEDBACK CONTROL of outer insulation diameter to dried insulation core wire again after blowing-dryer drying,
(3) adopt active back-twist paying out machine to carry out back twist unwrapping wire to the insulation core wire that step 2 is made, back twist rate is 40-45%;
(4) twist making 4 pairs of lines all according to helical arrangement by the insulation core wire of pairing device to back twist unwrapping wire, in strand in process, twisting pitch controls at 15-20mm, and the speed of twisted wire is 50-60m/min;
(5) by two turn round formula cabler by strand to after insulation core wire carry out S to twisted synthesizing cable, and control at 130-150mm by laying up pitch, stranding speed is set to 40-50m/min;
(6) low-smoke flame-retardant polyolefin sheathed material is joined in the machine barrel of 65 type double screw extruders and carries out plastifying fusion after drying, and by the screw rod in machine barrel, melt is squeezed in extrusion die, adopt initiatively unwrapping wire and the actinobacillus device of Tension Adjustable carries out drawing jointly by the extrusion die of 65 type double screw extruders to becoming core and a nylon rope, low-smoke non-halogen flame-retardant grid line is become by low-smoke flame-retardant polyolefin sheathed material is coated again after becoming core first coated by nylon rope after extrusion die, this grid line is dry by blower fan again after movable temperature control cooling water groove and the cooling of fixing cold water cooling revolution case successively, eccentricity detecting instrument is adopted to carry out on-line checkingi to dried grid line,
(7) qualified after testing grid line carries out cross winding lopping packaging through storage line tension frame, take-up meter counter and cross network twin shaft coiler successively.
2. a kind of low-smoke non-halogen flame-retardant as claimed in claim 1 surpasses the production technology of five class grid lines, it is characterized in that, described outer insulation diameter monitor adopts X-Y two-axis laser caliper.
3. a kind of low-smoke non-halogen flame-retardant as claimed in claim 2 surpasses the production technology of five class grid lines, it is characterized in that, the dielectric constant of described poly-PTFE material controls between 2.2-2.3.
4. a kind of low-smoke non-halogen flame-retardant as claimed in claim 3 surpasses the production technology of five class grid lines, it is characterized in that, described low-smoke flame-retardant polyolefin sheathed material adopts high density polyethylene (HDPE), ethylene-vinyl acetate copolymer mixed system is base-material, with ethylene propylene diene rubber, aluminium hydroxide and magnesium hydroxide for compound flame retardant, and by base-material and compound flame retardant admixed together add again conventional lubricant, antioxidant and processing aid first by extruder extruding pelletization and the 125 DEG C of crosslinkings with radiation accepting cobalt-60 γ radiation appliance after drying form.
5. a kind of low-smoke non-halogen flame-retardant as claimed in claim 4 surpasses the production technology of five class grid lines, it is characterized in that, it is 327-350 DEG C that the machine barrel on described Fluoroplastic extruder arranges scope to the temperature of extrusion die.
6. a kind of low-smoke non-halogen flame-retardant as claimed in claim 5 surpasses the production technology of five class grid lines, it is characterized in that, described 65 type double screw extruders adopt centering extruder head, and the mould that head is installed adopts half to squeeze tubular type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511014699.8A CN105489315A (en) | 2015-12-31 | 2015-12-31 | Production technology of low-smoke, halogen-free and flame-retardant CAT5E network cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511014699.8A CN105489315A (en) | 2015-12-31 | 2015-12-31 | Production technology of low-smoke, halogen-free and flame-retardant CAT5E network cable |
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| CN105489315A true CN105489315A (en) | 2016-04-13 |
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| CN201511014699.8A Pending CN105489315A (en) | 2015-12-31 | 2015-12-31 | Production technology of low-smoke, halogen-free and flame-retardant CAT5E network cable |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1749303A (en) * | 2004-09-15 | 2006-03-22 | 上海高分子功能材料研究所 | Infrared irridiation crosslinked polyethylene plastic for pipe, wire and cable and its preparing method |
| CN101546625A (en) * | 2009-05-07 | 2009-09-30 | 无锡江南电缆有限公司 | Recognizable cable, extrusion die and manufacture method thereof |
| CN102157249A (en) * | 2011-04-13 | 2011-08-17 | 广东昌宝通讯电缆电线有限公司 | Production process of low-smoke high-fireproof performance network wire |
| JP2012007139A (en) * | 2010-06-28 | 2012-01-12 | Kazunori Nishikawa | Production method for antistatic resin and antistatic resin |
| CN104538118A (en) * | 2014-12-17 | 2015-04-22 | 东莞市庆丰电工机械有限公司 | Micro data line physical foaming production device |
-
2015
- 2015-12-31 CN CN201511014699.8A patent/CN105489315A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1749303A (en) * | 2004-09-15 | 2006-03-22 | 上海高分子功能材料研究所 | Infrared irridiation crosslinked polyethylene plastic for pipe, wire and cable and its preparing method |
| CN101546625A (en) * | 2009-05-07 | 2009-09-30 | 无锡江南电缆有限公司 | Recognizable cable, extrusion die and manufacture method thereof |
| JP2012007139A (en) * | 2010-06-28 | 2012-01-12 | Kazunori Nishikawa | Production method for antistatic resin and antistatic resin |
| CN102157249A (en) * | 2011-04-13 | 2011-08-17 | 广东昌宝通讯电缆电线有限公司 | Production process of low-smoke high-fireproof performance network wire |
| CN104538118A (en) * | 2014-12-17 | 2015-04-22 | 东莞市庆丰电工机械有限公司 | Micro data line physical foaming production device |
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Application publication date: 20160413 |