CN103863720B - A kind of oil-less rust-proofing packing method of coil of strip - Google Patents
A kind of oil-less rust-proofing packing method of coil of strip Download PDFInfo
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- CN103863720B CN103863720B CN201410131590.1A CN201410131590A CN103863720B CN 103863720 B CN103863720 B CN 103863720B CN 201410131590 A CN201410131590 A CN 201410131590A CN 103863720 B CN103863720 B CN 103863720B
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Abstract
A kind of oil-less rust-proofing packing method of coil of strip, packaged coil of strip is in storage, transporting or adding inter process deposits in process, surface is not coated with anti-corrosion oil, it is characterized in that effects on surface is not coated with the coil of strip rustproof packaging material of anti-corrosion oil and protective packaging material is packed successively, each time packing draw in respectively at end face, all with cloth base adhesive tape, continuous sealing is carried out and reserved bleeding point to packing lap-joint, extraction equipment is adopted for twice to bleed process to each wrapper internal clearance, and in coil of strip, edge portion protective packaging layer external pasting has adhesive tape or the cloth base adhesive tape of cushion characteristic, finally use backplate, corner protector carries out external packing.The present invention is improved and increases safeguard function improved coil of strip rust prevention packaging effect and reliability by operations improvement, material improvement, manner of packing, decrease steel plate inunction process, for user saves oil removing cost and time, decrease petroleum resource consumption and sewage discharge, for contribution has been made in environmental protection.
Description
Technical field
The invention belongs to the oil-less rust-proofing packing method in the rust prevention packaging field, particularly coil of strip of product or commodity between intermetallic composite coating sequence.
Background technology
Current China metallurgy industry hot rolled steel plate and cold-rolling steel product for preventing corrosion, generally all at surface of steel plate coating anti-corrosion oil, and then carry out rust prevention packaging with rustproof packaging material in storage and transport process.Current main rust prevention packaging mode adopts volatile rust preventive paper, and few gas phase anti-tarnishing film that adopts is wrapped inside dress, then carries out external packing with protective packaging material.Increasing client wishes that surface of steel plate does not apply anti-corrosion oil now, thus reduces cleaning process, finally reduces manufacturing cost.Traditional anti-corrosion oil is reliable in conjunction with the manner of packing rust-proof effect of volatile rust preventive paper, and is required for the sheet material that surface is coated with plating without other.Because current the Rustproof Packaging Technology level limit, the very risky of corrosion is there is, although therefore terminal user proposes the requirement of coil of strip oil-less rust-proofing, due to adjoint larger corrosion risk after removing merely anti-corrosion oil, that in fact implements in packaging process is few, because lack feasible technical measures guarantee.Current comparatively general rust prevention packaging mode is: wrapped up by coil of strip with volatile rust preventive paper, lap-joint bonded with transparent plastic material adhesive tape, then wrap up with common plastics film.Outside endshield, all backplates, paper angle protector or Plastic protective corner, inside and outside steel corner protector carry out packing, tie is fixed.This manner of packing has the following disadvantages: 1, have certain clearance spaces between coil of strip and wrapper, and comparatively juicy can be wrapped in the inside when the ambient humidity of package handling is large, when variation of ambient temperature, surface of steel plate may produce condensation, thus causes corrosion.2, adhesive tape bonding effect is undesirable, easily come unglued by vibration influence in temperature, humidity and transportation and come off, cause leak tightness to decline, make the vapour phase inhibitor in rustproof packaging material accelerate to scatter and disappear, moisture simultaneously in environment enters inner packing space, reduces rust-proof effect.3, when pack environment high humidity, wet air is enclosed in coil of strip, increases the coil of strip corrosion probability after packaging.4, the object adopting common plastics film to carry out wrapping up prevents outside moisture from entering coil of strip, but common plastics film is polyethylene material substantially, and be much add reclaimed materials or filler to reduce costs, thus steam penetrating capacity is high, can not play good iris action when accumulating ambient humidity is large.5, damaged because shaking and clash into the rustproof packaging material easily making edge and end face in storage and transport process, and then produce water inlet, corrosion.Although adopt paper or Plastic protective corner to protect outward at anti-tarnish paper and packaging film at present; but this corner protector material is harder; undesirable to the protected effect of rustproof packaging material when colliding with coil of strip; thus at storage and transport process, especially still easily there is wrapper and film breakage time many in road length, sea-freight, handling link.
Summary of the invention
The object of this invention is to provide a kind of oil-less rust-proofing packing method of coil of strip, adopt existing packing, between two-layer packing, carry out twice vacuumizing and exhausting, improve rust prevention packaging effect, reduce steel plate inunction process, for user saves oil removing cost and time.
A kind of oil-less rust-proofing packing method of coil of strip, packaged coil of strip is storing, is transporting or add inter process and deposit in process, surface is not coated with anti-corrosion oil, it is characterized in that effects on surface is not coated with the coil of strip rustproof packaging material of anti-corrosion oil and protective packaging material is packed successively, each time packing draw in respectively at end face, be all, with cloth base adhesive tape, hermetically sealed and reserved bleeding point is carried out to packing lap-joint, adopt for twice extraction equipment to bleed process to each wrapper internal clearance; And there is at coil of strip inside and outside edge protective packaging layer external pasting adhesive tape or the cloth base adhesive tape of cushion characteristic, finally carry out external packing with backplate, corner protector.
Feature of the present invention and effect are: 1, carry out process of bleeding after the rustproof packaging material such as volatile rust preventive paper or gas phase anti-tarnishing film parcel, thus make the aggressive atmosphere in inner packing space, as acidic gas, the oxygen etc. such as moisture, hydrogen sulphide, sulphur dioxide, hydrogen chloride significantly reduce, greatly reduce the impact of the corrosion factor such as moisture in packaging space.2, adopt cloth base adhesive tape to substitute transparent plastic material adhesive tape, bonding, sealing effectiveness better, not easily tilt, more pliable and tougher, are particularly useful for the sealing at the pleating position of volatile rust preventive paper.3, rustproof packaging material places desiccant outward, the moisture in packaging space can be absorbed, reduce inner space relative humidity, improve rust-proof effect.Go back the moisture that Absorbable rod outside is infiltrated simultaneously, suppress it to enter inner space, reduce moisture to the impact of coil of strip corrosion.4, adopt the very low high-resistant diaphragm of steam penetrating capacity to do protective packaging, significantly can slow down the infiltration of outside moisture and oxygen, thus the impact of coil of strip by ambient humidity in storage and transport process is significantly reduced.5, by steel roll rim protective packaging material external pasting buffering adhesive tape or cloth base adhesive tape, make inner packing cracky position be subject to buffer protection, reduce the corrosion impact because the breakage of edge inner packing produces.6, by placing plastics or corrosion-free paper angle protector between steel roll rim and rustproof packaging material, reducing coil edges affects the breakage of packing, thus ensures leak tightness, reduces the corrosion because breakage causes.7, by placing padded coaming outward at protective packaging material, as expanded polyethylene foam, foam, corrugated board, calcium-plastic board etc., reduce steel roll rim curling uneven time breakage impact that antirust, protective packaging material are caused, also can alleviate because outside is collided with, to be clashed into and the volatile rust preventive paper paper hair that produces is bonded at the residue problem of steel roll rim simultaneously.The present invention from reduce inner packing space aggressive atmosphere, improve leak tightness and sealing reliability, raising packaging barrier, reduce damaged, moisture absorption angularly, improve and increase safeguard function improve coil of strip rust prevention packaging effect and reliability by operations improvement, material improvement, manner of packing.This is not only more effective to existing oiling coil of strip, the rust prevention packaging requirement not being coated with anti-corrosion oil coil of strip can also be met simultaneously, comprise its requirement in sea-freight, long-term storage and transport process, for coil of strip oil-less rust-proofing provides guarantee, meet the requirement of coil of strip terminal user, decrease the last handling processes such as cleaning, for reduction manufacturing cost, reduce petroleum resource consumption, reduce sewage discharge, reduce the aspect such as energy consumption and all have a significance.
Different according to coil of strip material, the accumulating Distance geometry resting period is different, and packing cost requires different, and above-mentioned measure can all adopt, and also can partly adopt.No matter adopt which measure, rust-proof effect is all significantly improved than current rust prevention packaging mode.
Detailed description of the invention
Coil of strip of the present invention refers to that surface is without the hot rolled plate of anti-corrosion oil process, general cold drawing, galvanized plate, tin plate, silicon steel plate, and its surface can through aqueous protective fluids process.By the oil-less rust-proofing packing method of coil of strip of the present invention, it is characterized by oil-less rust-proofing packaging process: 1, the coil of strip surface that sheet rolling mill completes is not coated with anti-corrosion oil, direct handling is on-the-spot to packaging.2, packaging is initial, and edge portion in coil of strip being wrapped up with Plastic protective corner or corrosion-free paper angle protector and fix, corner protector should be adjacent to coil of strip.Or put into volatile rust preventive paper or the volatile rust prevention core paperboard of rustproof packaging material at coil of strip inner core, and make paper be attached to core surface.3, with the rustproof packaging material such as volatile rust preventive paper or gas phase anti-tarnishing film, coil of strip is wrapped up again, and steel coil end-face by the inside fan-folded of cylindrical pleating and flatten after be pressed into inner core.4, with the cloth base adhesive tape of 80-120mm width rustproof packaging material lap-joint carried out continuous sealing and compress, and at the end of sealing, leaving bleeding point, the reserved wide opening of 50-100mm.5, the aspirate tube of vacuum pump is stretched into opening to bleed, suction pressure is unsuitable excessive, suitably controls the speed of evacuation, during air suction process, pleating for paper place is flattened, be evacuated to volatile rust preventive paper wrinkling and be attached to coil of strip surface, extract extraction pipe out, opening cloth base adhesive tape is sealed.6, respectively put a sheet desiccant outward at coil of strip both ends of the surface gas-phase rustproof packaging material and fix.Drying agent chip answers ready access upon use, should not be exposed to anti-moisture absorption too early, and shape can be square or circular ring type, and area is according to site environment humidity and accumulating time, traffic condition and determining.Both ends of the surface between rustproof packaging material and protective packaging material can also place sheet desiccant, its thickness is at 1mm-3mm.7, coated protective packaging material outside rustproof packaging material again, protective packaging material adopts 60-100 micron high-isolating packaging film to carry out hermetically sealed packaging to coil of strip, lap-joint's cloth base adhesive tape carries out hermetically sealed, the wide opening of 50mm-100mm is reserved in inner core lap-joint, the aspirate tube of vacuum pump is stretched into opening bleed, suction pressure is unsuitable excessive, according to steel roll package situation, be evacuated to the rustproof packaging material surface that high-resistant diaphragm is attached to internal layer, take out extraction pipe, opening cloth base adhesive tape is sealed.8, paste continuously along the inside and outside edge of coil of strip with the wide foam tape of 40mm-60mm or cloth base adhesive tape, respectively put a loop buffer pad outward at coil of strip both ends of the surface high-resistant diaphragm again and fix, loop buffer spacer thickness 2mm-5mm, circular inside diameters should be greater than coil of strip internal diameter 2mm-5mm, external diameter is less than coil of strip external diameter 2mm-5mm, and material can be EPE pearl wool, foam, corrugated board or calcium-plastic board.9, also fix at the inside and outside edge placement paper angle protector of coil of strip or Plastic protective corner, place steel endshield at steel coil end-face, place steel inner casing at inner core, outside coil of strip, place steel week backplate, then angle steel, outboard angle in placing, finally carry out packing, fixing with steel tie.
Volatile rust preventive paper in the present invention should meet the national standard such as QB/T1319, and gas phase anti-tarnishing film should meet the national standard such as GB/T19532, and oxygen transit dose, the moisture-vapor transmission of high-resistant diaphragm should meet the standard-requireds such as BB/T0041.
Implement comparative example 1
Certain steel mill produces steel plate for battery case, originally surface coating anti-corrosion oil, then packs with volatile rust preventive paper, adopts transparent PP rubber belt sealing, outsourcing common polythene plastic film.Corrosion is had to occur when being dealt into southern customers' place.Coil of strip needs to clean after arriving customers' place, and just can carry out following process, client wishes that surface of steel plate is not coated with anti-corrosion oil for this reason, to reduce matting.But because coil of strip oil-less rust-proofing technical risk is large, never realize.Adopt the inventive method to carry out trying bag to part coil of strip, process is as follows: 1, surface of steel plate is not coated with anti-corrosion oil, directly packs with volatile rust preventive paper, and carries out continuously hermetically sealed with cloth base adhesive tape to paper lap-joint and volatile rust preventive paper and interior core paper lap-joint.2, reserve the wide opening of 50mm-80mm in inner core lap-joint, vacuum pump line is stretched into opening and bleeds, during operation, pleating for paper place is flattened, be evacuated to volatile rust preventive paper and be attached to coil of strip surface; Extract extraction pipe out, opening cloth base adhesive tape is sealed.3, respectively put a sheet desiccant outward at coil of strip both ends of the surface volatile rust preventive paper and fix.4,100 micron thickness high-resistant diaphragms are adopted to be wrapped in outside volatile rust preventive paper, lap-joint's cloth base adhesive tape carries out hermetically sealed, the wide opening of 50mm-80mm is reserved in inner core lap-joint, vacuum pump line is stretched into opening bleed, be evacuated to high-resistant diaphragm and be attached to coil of strip surface, take out extraction pipe, opening cloth base adhesive tape is sealed.5, paste continuously along the inside and outside edge of coil of strip by the wide foam tape of 50mm.6, respectively put an annular 2mm thickness E PE buffering spacer outward at steel coil end-face high-resistant diaphragm and fix.7, in coil of strip, edge portion is placed paper angle protector and is fixed, and at steel coil end-face placement steel endshield, places steel inner casing, places steel week backplate outside coil of strip, then place interior angle steel, outboard angle at inner core, finally carry out packing, fixing with steel tie.The battery coil of strip adopting this technique to pack is dealt into In Guangdong Province, finds the inside and outside all non-corrodings of steel plate, meet its operating needs after client Kai Bao.
Implement comparative example 2
Certain steel mill's hot rolling acid-cleaning plate adopted surface to be coated with anti-corrosion oil in the past, then transport by the mode of volatile rust prevention paper wrapper, its manner of packing is: wrap up with volatile rust preventive paper, with PP adhesive tape, paper lap-joint is sealed, then pack with endshield, inside and outside backplate and inside and outside angle steel, dispatch from the factory after tie is fixing.Customer requirement hot rolling acid-cleaning plate surface was not coated with anti-corrosion oil afterwards.For realizing oil-less rust-proofing packaging, adopt the technology of the present invention, consider cost requirement, and be mail to domestic, the accumulating time is not long, and therefore packaging operation improves as follows: 1, surface of steel plate is not coated with anti-corrosion oil, places Plastic protective corner and fix in inside and outside edge, then pack with volatile rust preventive paper, and carry out continuously hermetically sealed with cloth base adhesive tape to paper lap-joint and volatile rust preventive paper and interior core paper lap-joint.2, reserve the wide opening of 50mm-80mm in inner core lap-joint, vacuum pump line is stretched into opening and bleeds, pleating for paper place flattens by period, is evacuated to volatile rust preventive paper and is attached to coil of strip surface, extracts extraction pipe out, is sealed by opening cloth base adhesive tape.3,100 micron thickness high-resistant diaphragms are adopted to be wrapped in outside volatile rust preventive paper, lap-joint's cloth base adhesive tape carries out hermetically sealed, the wide opening of 50mm-80mm is reserved in inner core lap-joint, vacuum pump line is stretched into opening bleed, be evacuated to high-resistant diaphragm and be attached to coil of strip surface, take out extraction pipe, opening cloth base adhesive tape is sealed.4, paste continuously along the inside and outside edge of coil of strip on high-resistant diaphragm with the wide cloth base adhesive tape of 50mm.5, place paper angle protector in the inside and outside edge of coil of strip and fix, at steel coil end-face placement steel endshield, placing steel inner casing at inner core, outside coil of strip, place steel week backplate, then place interior angle steel, outboard angle, finally carry out packing, fixing with steel tie.The hot rolling acid-cleaning coil of strip adopting this technique to pack is dealt into customers' place, finds the inside and outside all non-corrodings of steel plate, meet its operating needs after opening bag.
Claims (6)
1. the oil-less rust-proofing packing method of a coil of strip, packaged coil of strip is deposited in process at storage, transport or inter process, surface is not coated with anti-corrosion oil, it is characterized in that effects on surface is not coated with the coil of strip rustproof packaging material of anti-corrosion oil and protective packaging material is packed successively, each time packing draw in respectively at end face, all with cloth base adhesive tape, hermetically sealed and reserved bleeding point is carried out to packing lap-joint, adopt for twice extraction equipment to bleed process to each wrapper internal clearance; And there is at coil of strip inside and outside edge protective packaging layer external pasting the adhesive tape of cushion characteristic, finally carry out external packing with backplate, corner protector.
2. the oil-less rust-proofing packing method of coil of strip according to claim 1, it is characterized in that volatile rust preventive paper or the volatile rust prevention core paperboard of putting into rustproof packaging material at coil of strip inner core, and make paper be attached to core surface, coil of strip is wrapped up again with rustproof packaging material, and at steel coil end-face by the inside fan-folded of cylindrical, pressing, then with described adhesive tape by rustproof packaging material lap-joint continuous sealing, and at the end of sealing, leave bleeding point, the reserved wide 50-100mm of opening; Adopt extraction equipment to be extracted out by the air in packaging, then with adhesive tape, bleeding point is sealed completely; Then with protective packaging material, the coil of strip wrapping up rustproof packaging material is packed again again, then to be fixed with described adhesive tape and by lap-joint's continuous sealing, bleeding point is left at the end of sealing, again adopt extraction equipment to be extracted out by the air between rustproof packaging material and protective packaging material, then implement to seal completely to bleeding point with described adhesive tape.
3. the oil-less rust-proofing packing method of coil of strip according to claim 1, it is characterized in that placing sheet desiccant between the both ends of the surface and the both ends of the surface of protective packaging material of rustproof packaging material, its thickness is at 1mm-3mm.
4. the oil-less rust-proofing packing method of coil of strip according to claim 1, it is characterized in that when initial package, with Plastic protective corner or corrosion-free paper angle protector edge portion in coil of strip wrapped up and fix, corner protector should be adjacent to coil of strip, simultaneously or select the steel coil end-face outside protective packaging material to place padded coaming.
5. the oil-less rust-proofing packing method of coil of strip according to claim 1, is characterized in that packing the rustproof packaging material adopted, refers to volatile rust preventive paper or gas phase anti-tarnishing film; Protective packaging material used is high-resistant diaphragm, and refer to plastic sheeting or the complex film aqueous vapor and oxygen to extremely low permeability, high-resistant diaphragm thickness is at 60-100 micron.
6. the oil-less rust-proofing packing method of coil of strip according to claim 2, is characterized in that air suction process: be pumped to rustproof packaging material wrinkling and be close to coil of strip surface, protective packaging material is wrinkling and be close to the rustproof packaging material of internal layer.
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| CN201410131590.1A CN103863720B (en) | 2014-04-02 | 2014-04-02 | A kind of oil-less rust-proofing packing method of coil of strip |
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| CN201410131590.1A CN103863720B (en) | 2014-04-02 | 2014-04-02 | A kind of oil-less rust-proofing packing method of coil of strip |
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| CN103863720B true CN103863720B (en) | 2015-09-09 |
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| CN107731505A (en) * | 2017-10-17 | 2018-02-23 | 上海中浦电磁科技有限公司 | A kind of knuckle processing, performance detection and packing method unshakable in one's determination |
| CN108146743B (en) * | 2017-11-14 | 2020-06-09 | 武汉船用机械有限责任公司 | Packing method for shafting |
| CN109398961A (en) * | 2018-08-28 | 2019-03-01 | 天津炬坤金属科技有限公司 | The oil-less rust-proofing technique and rust prevention packaging of the cold rolling black plate of long rust-proof life |
| CN111532514A (en) * | 2020-05-07 | 2020-08-14 | 哈尔滨电机厂有限责任公司 | Oil-free rust-proof packaging method for large hydraulic generator magnetic yoke punching sheet |
| CN111806888A (en) * | 2020-07-09 | 2020-10-23 | 沈阳防锈包装材料有限责任公司 | Antirust packaging method for nuclear power metal parts or equipment |
| CN113351644A (en) * | 2021-05-31 | 2021-09-07 | 北京首钢股份有限公司 | Method for reducing occurrence rate of corrosion on surface of pickled plate |
| CN113562344B (en) * | 2021-07-30 | 2022-07-08 | 北京科技大学 | Steel coil rust-proof vacuum packaging method |
| CN114086222B (en) * | 2021-11-09 | 2023-11-10 | 江苏沙钢集团有限公司 | Control method for tin plate painting shrinkage defect |
| CN114654645A (en) * | 2022-04-11 | 2022-06-24 | 沈阳丰禾包装有限公司 | Preparation method of PE regenerated guard plate |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3434712A1 (en) * | 1984-09-21 | 1986-04-10 | Maschinenfabrik Goebel Gmbh, 6100 Darmstadt | Packaging material |
| JPH0648460A (en) * | 1992-07-20 | 1994-02-22 | Toyota Motor Corp | Rust preventive package paperboard |
| CN2331610Y (en) * | 1998-07-30 | 1999-08-04 | 武钢北湖农场包装材料厂 | Air-cushion board for steels packing |
| CN1167586C (en) * | 2002-05-24 | 2004-09-22 | 金荣范 | Packaging material for roll material and its packaging method |
| CN2587633Y (en) * | 2002-12-13 | 2003-11-26 | 沈阳防锈包装材料有限责任公司 | Composite high-barrier air-phase antirust film |
| CN101070102B (en) * | 2006-05-12 | 2010-05-12 | 安徽马钢和菱包装材料有限公司 | Plastic, film semic-enclosing package method for steel roll |
| CN2934124Y (en) * | 2006-08-17 | 2007-08-15 | 梁军 | Cold rolled sheet nitrogen rust-preventive packaging |
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