A kind of cable jacket manufacture method eliminating jacket surface defectTechnical field:
The present invention relates to a kind of electric wire manufacturing technology, particularly relate to a kind of cable jacket manufacture method eliminating jacket surface defect.
Background technology:
Thermoplastic is (as polyvinylchloride, polythene PE, low smoke and zero halogen etc.) because of it, to have electrical insulation properties excellent, and cryogenic property is good, and the better and proportion of chemical stability is less etc., and advantage is extensively used as insulation and the protective cover material of cable (electric wire).But thermoplastic is in extrusion molding process, also come with some shortcomings, if processing technology is improper, be easy to produce many blemish, cause cable being delivered for use or in transportation, because of cable outward appearance or electric property defective and cause scrapping of whole cable.The common blemish of cable has: jacket surface water wave-shaped is uneven; Cable surface is coarse, and brightness is poor; There is " water spot " of dense distribution in certain one side on surface; There is residual shear stress in extrusion, cause the sheath in cable later stage to ftracture; Plastics plasticizing is uneven, causes the low temperature brittleness performance degradation of plastics; In sheath, reticulate pattern is uneven, causes cable overall structure to loosen.
Summary of the invention:
The object of the invention is to overcome above-mentioned prior art Problems existing, propose a kind of manufacture method eliminating cable jacket blemish; Shear stress when adopting the method can eliminate plastic extrusion completely, produced cable has that product surface is bright and clean, cable low temperature brittleness performance is good, cable inner even structure, the advantages such as entirety is compacter.
In order to realize foregoing invention object, present invention employs following technical scheme:
Eliminate a cable jacket manufacture method for jacket surface defect, carry out successively according to following operation:
Unwrapping wire, sheathing, surface treatment, saponification, cooling, traction, take-up, packaging warehouse-in;
Initiatively paying out machine is have employed in described unwrapping wire operation;
Screw extruder is have employed in described sheathing operation;
Have employed frosting processor in described surface treatment procedure, the front-end configuration of the frosting processor duct type gas heater eliminated stress, the backend arrangement of frosting processor carries out the UV curing apparatus of photocuring process;
Described saponifying process is by filling in the tank of saponification liquor by the cable after surface treatment;
Described refrigerating work procedure is that the cable (do not cooled completely) after saponifying process is carried out cooling process through frozen water bosh.
Described traction operation adopts wheel type tractor or the cable of caterpillar tractor to forming at the uniform velocity to pull;
Described wire-drawing process is fitly wrapped on Wire winding shaft by ready-made cable.
The weight proportion of described saponification liquor is: 0.8-1.2% sodium n-alkylbenzenesulfonate, 0.8-1.2% lauryl sodium sulfate, 0.3-0.8% fatty alcohol, 0.3-0.8% alkene sulfonic acid sodium, 0.3-0.8% polyoxyalkylene ether sodium sulfate, 0.3-0.8% alkylolamides, 0.3-0.8% APG, 0.3-0.8% alkyl betaine, all the other are water.
Described duct type gas heater comprises gas storage pipeline and gas storage pipeline is provided to the heat blower of hot-air.
The ultraviolet wavelength that described UV curing apparatus sends is 300-400nm.
The recirculated water that described frozen water bosh adopts carries out cooling by ice machine and processes.
Compared with prior art, beneficial effect of the present invention shows the following aspects:
1, actinobacillus device of the present invention is initiatively paying out machine, uses active release Wiring technology can eliminate cable and puts in the process of protecting and fluctuate, form " laminar flow ", eliminate the water wave-shaped defect of jacket surface when avoiding sheath to be coated on cable semi-finished product.
2, the present invention increases by one process of surface treatment in the middle of screw extruder head to bosh process, eliminate the shear stress of plastic extrusion, plasticizing becomes even, and frosting molecule aggregation is recombinated, improve surface smoothness and case hardness, and avoid because of not shaping cable that to enter the inside and outside contraction that bosh causes prematurely inconsistent, cause the uneven and surface of interior reticulate pattern to produce the defect such as pit, weld mark.
3, the present invention has also set up one saponifying process, is avoided " water spot " defect of sheath by this operation.The weight proportion of described saponification liquor is: 0.8-1.2% sodium n-alkylbenzenesulfonate, 0.8-1.2% lauryl sodium sulfate, 0.3-0.8% fatty alcohol, 0.3-0.8% alkene sulfonic acid sodium, 0.3-0.8% polyoxyalkylene ether sodium sulfate, 0.3-0.8% alkylolamides, 0.3-0.8% APG, 0.3-0.8% alkyl betaine, all the other are % water.
Because the liquid level tension force of saponification liquor is comparatively large, not easily form water-drop sputtering, thus adopt saponification liquor can effectively avoid jacket surface to produce the defect of " water spot ".
4, frozen water bosh of the present invention, can make cable be cooled to normal temperature rapidly and the structure of cable is finally solidified, and improve production efficiency.
Accompanying drawing explanation
Fig. 1 is manufacturing process flow diagram of the present invention.
Fig. 2 is the structural representation of frosting processor.
Fig. 3 is the pipeline annexation schematic diagram (overlooking state) of frozen water bosh and cooling system.
Specific embodiments
Further illustrate below in conjunction with embodiment shown in the drawings.
The cable jacket manufacture method of elimination blemish provided by the invention, realizes according to following technological process: unwrapping wire, sheathing, surface treatment, saponification, cooling, traction, take-up, packaging warehouse-in.
Described unwrapping wire operation have employed initiatively paying out machine, is the paying out reel being wrapped cable half-finished I-beam wheel loading active paying out machine is carried out unwrapping wire; The object of utilization active unwrapping wire is that elimination cable is put in the process of protecting and fluctuates, when avoiding sheath to be coated on cable semi-finished product, (described " laminar flow " refers to there is motion mutually between protective cover material and semi-finished product to form " laminar flow ", and during because of sheathing, the state of protective cover material is molten, thus forms the surface being similar to water wave-shaped).
The multiple screw extruder that described sheathing operation adopts thermoplastic special, the temperature-controlled cooling system precision of extrusion equipment wants high, extrude processing temperature to commonly use temperature according to thermoplastic and control, extrusion die adopts extruding or crowded pipe mold, is specifically determined by sheath material.
Described surface treatment procedure refers to increases a process of surface treatment in the middle of cable is from cross-head to bosh process, its objective is the shear stress eliminating plastic extrusion, and frosting molecule aggregation is recombinated, improve surface smoothness, case hardness, and avoid causing the inside and outside contraction of sheath inconsistent because not shaping cable enters tank prematurely, cause interior reticulate pattern inequality and surface to produce pit, weld mark etc.Described process of surface treatment is achieved by means of the correlation function of frosting processor.Described frosting processor is made up of two parts: have the duct type gas heater of thermo-molecular stress elimination function and have the UV curing apparatus of photocuring processing capacity.Duct type gas heater (buyable acquisition) comprises gas storage pipeline and gas storage pipeline is provided to the heat blower of hot-air, and effect is the surface shearing stress eliminating sheath.As shown in Figure 2: gas storage pipeline is horizontally disposed, from the multiple screw extruder cable being coated with sheath out, enter the inner chamber of gas storage pipeline from one end level of gas storage pipeline, after standing the heat treatment of hot gas, then export (carrying out photocuring process subsequently) from one end of gas storage pipeline; Heat blower then adds hot-air by pipeline to the input of gas storage pipeline; Usually the temperature adding hot-air is 100-150 DEG C, specifically can select as required to determine.UV curing apparatus is the uviol lamp of configuration polycarbonate lampshade, and emission wavelength usually can be selected to be that (power is generally 2-5KW to the ultraviolet uviol lamp of 300-400nm.) visible in Fig. 2: the uviol lamps of upper and lower two configuration polycarbonate lampshades are arranged symmetrically with, and cable passes between two uviol lamps with certain speed; Cable is after Ultraviolet radiation, and the molecular structure of frosting carries out polymerization restructuring, thus can improve hardness and the fineness of jacket surface, substantially increases optics scuff resistance and the weather resistance of plastics, avoids sheath cracking during cable construction in later period.
Described saponifying process refers to by the cable after surface treatment by filling in the tank of saponification liquor, and object is to avoid sheath to produce " water spot " defect.Saponification liquor proportioning is: 0.8-1.2% sodium n-alkylbenzenesulfonate, 0.8-1.2% lauryl sodium sulfate, 0.3-0.8% fatty alcohol, 0.3-0.8% alkene sulfonic acid sodium, 0.3-0.8% polyoxyalkylene ether sodium sulfate, 0.3-0.8% alkylolamides, 0.3-0.8% APG, 0.3-0.8% alkyl betaine, all the other are % water.Saponification liquor optimum ratio is: 1% sodium n-alkylbenzenesulfonate, 1% lauryl sodium sulfate, 0.5% fatty alcohol, 0.5% alkene sulfonic acid sodium, 0.5% polyoxyalkylene ether sodium sulfate, 0.5% alkylolamides, 0.5% APG, 0.5% alkyl betaine, 95% water.Because the liquid level tension force of saponification liquor is comparatively large, not easily form water-drop sputtering, so can effectively avoid sheath to produce " water spot ".
Described refrigerating work procedure refers to that the cable A do not cooled completely is through the cooling process of frozen water bosh, makes cable be cooled to normal temperature rapidly and the structure of cable is finally solidified.Described refrigerating work procedure has the effect of two aspects: the contour structures 1, solidifying cable; 2, enhance productivity.Show in Fig. 3: in cooling system (preferred ice machine) cooling fluid, be laid with heat-absorbing water pipe, the recirculated water with uniform temperature exported by frozen water bosh one end, extract by being removed a part of heat after water inlet pipe input heat-absorbing water pipe by pump, flowed into the other end of frozen water bosh again by return pipe, make the recirculated water in frozen water bosh remain on certain temperature (normally 0-10 DEG C).Conventional bosh can be adopted, then configure cooling system cooling processing is carried out to the recirculated water in bosh.
Described traction operation refers to uses wheel type tractor or the cable of caterpillar tractor to forming at the uniform velocity to pull, and ensures the uniformity of cable diameter.Wheel type tractor or caterpillar tractor can directly obtain in outsourcing.
Described wire-drawing process to refer to ready-made cable fitly around on Wire winding shaft, facilitates the later stage to check and client's use.
Whole manufacturing process is as follows:
According to the related accessories that technological requirement gets out put the semi-finished product cable before protecting, protective cover material and puts needed for sheath.Semi-finished product cable is installed on active paying out machine (see Fig. 1), regulate suitable payingoff speed, after the temperature of sheathing machine reaches design temperature, assemble suitable mould according to technological requirement, reach until mold temperature production of can starting shooting after design temperature.Need before production to carry out following work: (1), the heat blower regulating frosting processor and UV curing apparatus, the temperature of heat blower is to be advisable lower than sheathing machine head extruded stock (protective cover material) temperature 10-20 DEG C, and the wavelength control of UV curing apparatus middle-ultraviolet lamp is advisable at 300-400nm.(2), configure saponification liquor, and stir, form numerous little foam with saponification liquor surface and be advisable.(3), the cooling system of frozen water bosh needs to open in advance, and guarantees that water temperature controls to be advisable at 0-10 DEG C.After all preparation all completes, start sheathing machine switch, discharge eccentric, the linked switch starting traction and take-up normally can make line.Use this process, the sheath smooth appearance of the cable finished product produced is smooth; The weatherability of product, low temperature brittleness performance all obtains optimization; The shear stress of sheathing is eliminated, and environmental cracking phenomenon obtains to be avoided; The internal structure of cable obtains homogenizing, and cable entirety is compacter.The electric wire product using the method to manufacture, has paved road for entering international market.