CN113210238A - Container preparation process and container - Google Patents
Container preparation process and container Download PDFInfo
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- CN113210238A CN113210238A CN202110676606.7A CN202110676606A CN113210238A CN 113210238 A CN113210238 A CN 113210238A CN 202110676606 A CN202110676606 A CN 202110676606A CN 113210238 A CN113210238 A CN 113210238A
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- container
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- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000003973 paint Substances 0.000 claims abstract description 95
- 229910001039 duplex stainless steel Inorganic materials 0.000 claims abstract description 66
- 238000005507 spraying Methods 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 35
- 239000002994 raw material Substances 0.000 claims abstract description 32
- 230000008569 process Effects 0.000 claims abstract description 28
- 229910001220 stainless steel Inorganic materials 0.000 claims description 28
- 239000010935 stainless steel Substances 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 21
- 238000004381 surface treatment Methods 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 239000010426 asphalt Substances 0.000 claims description 5
- 238000003754 machining Methods 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 abstract description 26
- 230000007797 corrosion Effects 0.000 abstract description 23
- 238000004519 manufacturing process Methods 0.000 abstract description 17
- 238000007591 painting process Methods 0.000 description 9
- 238000005422 blasting Methods 0.000 description 8
- 238000005488 sandblasting Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000033764 rhythmic process Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 206010033799 Paralysis Diseases 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000010422 painting Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000013585 weight reducing agent Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 2
- 229910000165 zinc phosphate Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
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- 229920002647 polyamide Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
- B05D7/227—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes of containers, cans or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
- B05D2202/15—Stainless steel
Abstract
The invention relates to a container preparation process and a container, wherein the method comprises the following steps: the method comprises the steps of pretreating duplex stainless steel raw materials, forming the pretreated duplex stainless steel raw materials into parts, assembling the parts into the container body, spraying paint on the surface of the container body, wherein the paint is inner paint and finish paint, the duplex stainless steel with better corrosion resistance is adopted, and when the paint is sprayed, only the inner paint and the finish paint need to be sprayed, so that the cost of a spraying process is reduced, and the production time is shortened.
Description
Technical Field
The invention relates to the field of containers, in particular to a container preparation process and a container.
Background
Containers have become the main carrier of goods transportation in the global scope due to the standardization and the set of established transportation systems, and the environment of the containers is usually corrosive, so the containers need to have certain corrosion resistance.
The main raw material used by the container in the prior art is carbon steel, the carbon steel can not meet the requirement of the corrosion resistance of the container, so the painting process needs to be carried out for strengthening protection, the painting process of the container is complicated, the painting process comprises the steps of firstly spraying the anticorrosive paint, drying, then spraying the intermediate paint, drying, and then spraying the finish paint, in the painting process, whether automatic painting or manual painting needs to meet the requirement of meeting the production rhythm, painting and drying are finished within the specified time (within 7-8 minutes), and if the painting process is overtime or careless, the production rhythm is slowed down or the whole line is paralyzed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a container preparation process and a container, and the specific scheme is as follows:
in a first aspect, a container preparation process is provided, comprising:
s1, pretreating the duplex stainless steel raw material;
s2, forming the pretreated duplex stainless steel raw material into parts;
s3, assembling the parts into a container body;
s4, spraying inner paint on the inner surface of the container body, and spraying finish paint on the outer surface of the container body.
In a preferred embodiment, the pre-treating of the duplex stainless steel raw material comprises:
uncoiling the duplex stainless steel raw material, carrying out primary surface treatment, shearing, machining and drying.
In a preferred embodiment, the forming the pretreated stainless steel raw material into the component part comprises:
and processing and forming the pretreated duplex stainless steel raw material into a post-forming part.
In a preferred embodiment, the assembling the components into a container body comprises:
and welding the parts once after assembly, performing final assembly after welding once, and then performing secondary welding to form the container body.
In a preferred embodiment, the duplex stainless steel raw material is S32001 duplex stainless steel.
In a preferred embodiment, before spraying the inner surface of the container body with the inner paint and spraying the outer surface with the finish paint, the container body is subjected to a second surface treatment.
In a preferred embodiment, the spraying of the inner surface of the container body with the inner paint and the spraying of the outer surface with the finish paint include:
and spraying inner paint on the internal standard of the container body after the second surface treatment, spraying outer paint on the outer surface of the container body, leveling and drying to finish paint spraying on the container body.
In a preferred embodiment, after the inner surface of the container body is coated with the inner paint and the outer surface is coated with the finish paint, asphalt is sprayed on the bottom of the container body, and then the container body is dried.
In a preferred embodiment, after the container body is coated with the inner paint on the inner surface and the finish paint on the outer surface, the container body sealing, the watertight test and the container discharging test are further included.
In a second aspect, a container is provided, made as described above.
According to the container preparation process, the duplex stainless steel raw material is pretreated, the pretreated duplex stainless steel raw material is molded into parts, the parts are assembled into the container body, paint is sprayed on the surface of the container body, so that the inner paint and the finish paint are adopted, the duplex stainless steel with better corrosion resistance is adopted, and the inner paint and the finish paint only need to be sprayed when the paint is sprayed, so that the cost of the spraying process is reduced, the container production time is shortened, the slow production rhythm or whole line paralysis caused by overtime work or careless leakage caused by multiple spraying is avoided, and the purposes of cost reduction and efficiency improvement are achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a container manufacturing process of the present invention;
fig. 2 is a graph comparing mechanical properties of conventional stainless steel and duplex stainless steel.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the present invention provides a container preparation process, comprising:
and S1, pretreating the duplex stainless steel raw material.
The containers of the invention comprise common standard containers, bulk containers, heat-insulating containers, platform containers and the like, and the types of the containers comprise dry containers, frozen containers, open-top containers and the like.
In step S1, duplex stainless steel is used as the raw material, wherein the duplex stainless steel material may be selected from the duplex stainless steels of QN1803 and S32001, which are merely examples, and the present invention is not limited to these duplex stainless steels, and the compositions of QN1803 and S32001 are shown in table 1:
TABLE 1
In table 1, 304 is a conventional stainless steel, and it can be seen from table 1 that the composition of the duplex stainless steel is greatly different from that of the conventional stainless steel, the contents of Mo, Cu, N, and Ni in the duplex stainless steel are obviously different from that of the conventional stainless steel, and the composition of different types of duplex stainless steel materials is different, QN1803 and S32001 are obviously different from that of C, Ni, and Cu, but the mechanical properties of the duplex stainless steel material as a whole, and the requirements of yield strength/tensile strength/elongation are 463-465(Mpa)/693-700 (Mpa)/35.4-36.1%, respectively, which are superior to those of the conventional steel material 350(Mpa)/490 (Mpa)/22%, therefore, the container body prepared by using the duplex stainless steel material has better overall quality.
The duplex stainless steel raw material is subjected to a pretreatment, such as a process of unwinding, shearing, and surface treatment, before being formed into a component.
And S2, forming the pretreated duplex stainless steel raw material into parts.
And S3, assembling the parts into a container body.
The container generally has components such as a top plate, a left side plate, a right side plate, a front door frame, a rear door frame, a bottom frame, and a top frame, and thus, after pretreating duplex stainless steel raw materials, step S2 is performed, the pretreated duplex stainless steel raw materials are molded into parts, the parts may be components of the container body, step S3 is performed again, the parts are assembled into the container body, different parts are assembled, portions to be connected are welded, and the whole container body is assembled.
S4, spraying inner paint on the inner surface of the container body, and spraying finish paint on the outer surface of the container body.
The duplex stainless steel of the invention is far superior to the conventional steel in the aspect of mechanical property, and has better corrosion resistance, as shown in table 2:
TABLE 2
As can be seen from Table 2, the corrosion resistance data of the duplex stainless steel is greatly different from that of the conventional stainless steel under the condition of the same thickness, the pitting potential and the pitting rate of the duplex stainless steel are lower than those of the conventional stainless steel, and the data of 5% sulfuric acid and the data of the crystal corrosion D method are obviously lower than those of the conventional stainless steel, so that the overall corrosion resistance of the duplex stainless steel is obviously better than that of the conventional stainless steel.
When the container is prepared by the conventional stainless steel, the paint spraying treatment process comprises spraying anticorrosive paint on the outer surface, then spraying intermediate paint, then spraying finish paint, and spraying inner paint on the inner surface, according to the comparison of the data of the manufactured products, the paint spraying in the paint spraying treatment process in the production process of the duplex stainless steel container can change the multi-time spraying of the outer surface of the container into one-time spraying, so that the finish paint can be directly sprayed on the outer surface of the molded container body in the step S4 without spraying the anticorrosive paint and the intermediate paint, thereby greatly saving the production cost, as shown in Table 3:
TABLE 3
Taking a container with the specification of 20GP as an example, the paint cost accounts for 7.1%, and when a conventional steel material is adopted to produce the container, the container needs to be subjected to primary zinc powder spraying, secondary zinc powder spraying, intermediate paint spraying, inner paint spraying and outer paint spraying, and by adopting the method disclosed by the invention, only primary zinc powder, inner paint and outer finish paint need to be subjected to during the process of producing the container by adopting a duplex stainless steel material, so that the cost of a painting process is saved by about 46.19% (the specification of 20 GP), and similarly, for a container with the specification of 40HC, by adopting the method disclosed by the invention, the cost of the painting process can be saved by about 47.74% (the specification of 40 HC). Furthermore, when the paint is sprayed, only the inner paint and the finish paint need to be sprayed, so that after the paint spraying treatment process is improved, the antiseptic treatment steps in the paint spraying treatment process are reduced, the problem that the production rhythm is slowed down or the whole line is paralyzed due to overtime work or careless mistakes during the spraying of the middle layer paint and the finish paint on the paint spraying station of the production line is solved, the efficiency is improved, the cost is reduced, and the purposes of reducing cost and improving efficiency are achieved.
In a preferred embodiment, the pre-treatment of the duplex stainless steel raw material comprises:
uncoiling a duplex stainless steel raw material, carrying out primary surface treatment, shearing, machining and then drying.
In the embodiment, in the process of pretreating the duplex stainless steel raw material, a duplex stainless steel raw material coil is firstly uncoiled, the duplex stainless steel raw material coil is pressed into a plate material through a material pressing roller, then the plate material is led out, the plate material is sent to a leveling machine to be leveled, and after the leveling machine is used, the surface treatment is carried out.
The sand blasting is a surface strengthening process, sand blasting is carried out on the surface of a plate, compressed air is used as power to form a high-speed spray beam, and the spray material (shot blasting glass beads, steel shots, steel grits, quartz grits, carborundum, iron grits and sea grits) is sprayed on the surface of the plate at a high speed, so that the mechanical property of the outer surface of the plate is changed, impurities, variegated colors and an oxide layer on the surface are removed, the shot blasting is a mechanical surface treatment process, the principle is that small steel shots or small iron shots are thrown out by an impeller rotating at a high speed to clean the surface of a part, the purpose of improving the appearance quality is achieved, the workpiece is attractive, meanwhile, the welding tensile stress of the workpiece is changed into compressive stress, the service life of the workpiece is prolonged, and the diameter of common shots (including cast shots, cut shots, stainless steel shots and the like) is 0.2-3.0. The surface treatment in the invention can comprise one or two of sand blasting and shot blasting, namely, sand blasting treatment can be carried out on the plate, shot blasting treatment can also be carried out on the plate, and shot blasting can be carried out after the plate is subjected to sand blasting treatment, shot blasting treatment can also be carried out, and sand blasting can be carried out firstly and then the shot blasting can be carried out.
After surface treatment, the plate is sent into a cutting device, cut into different lengths, then sent into a machining device, machined and formed into a plate with a preset shape, and dried after machining.
In a preferred embodiment, forming the pre-treated stainless steel stock material into a component part comprises:
and processing and molding the pretreated duplex stainless steel raw material into a post-molding part.
In the present embodiment, the pretreated duplex stainless steel material is processed and molded into parts, and the parts of the container body include, but are not limited to, side intermediate plates, door panels, roof panels, side edge plates, front plates, door horizontal beams, lintel plates, roof plates, fork pocket roof plates, front lintel plates, front lower beams, door upper beams, fork pocket cross beams, bottom cross beams, rear corner posts, doorsills, bottom side beams, front and rear corner posts, side roof square tubes, and door vertical beams.
In a preferred embodiment, the assembly of the components into a container body comprises:
and (3) welding the parts once after the parts are assembled, performing final assembly after the parts are welded once, and then performing secondary welding to form the container body.
As shown in fig. 2, the mechanical property data of the conventional stainless steel and the duplex stainless steel material in the present invention includes that the yield strength of the conventional stainless steel 304 is 310MPa, the yield strength of the duplex stainless steel QN1803 is 420MPa, the tensile strength of S32001 is 491MPa, the tensile strength of the conventional stainless steel 304 is 670MPa, the yield strength of the duplex stainless steel QN1803 is 730MPa, the tensile strength of S32001 is 713MPa, the elongation of the conventional stainless steel 304 is 58%, the elongation of the duplex stainless steel QN1803 is 51%, the tensile strength of S32001 is 40%, the Hardness (HRB) of the conventional stainless steel 304 is 84.5, the elongation of the duplex stainless steel QN1803 is 93.3, and the tensile strength of S32001 is 95.4.
Therefore, in the duplex stainless steel container body of the present invention, on the one hand, the thickness of the plate material is reduced compared to the container in the conventional art: compared with the container in the prior art, under the condition of achieving the same performance, the thickness of the new duplex stainless steel material is thinner, so that the weight of the finished stainless steel container is reduced, taking 20GP and 40HC standard containers as examples, the thickness of the main plates, including side middle plates, side plates, door plates, top plates and front plates, is reduced from 1.6-2.0mm to 1.5mm, more containers can be stacked in the process of shipping, and the purpose of increasing the shipping capacity is achieved; and the high-temperature-resistant and high-temperature-resistant composite material has good bearing capacity, and has equivalent impact resistance, high temperature resistance and low temperature resistance.
On the other hand, the container preparation process achieves the purpose of weight reduction, so that the weight of the finished container is reduced as shown in Table 4, for a 20GP box type container, the average weight is 2020KG by adopting conventional stainless steel, while the average weight is 1950KG by adopting duplex stainless steel, the weight reduction is 70KG, for a 40HC box type container, the average weight is 3500KG by adopting conventional stainless steel, while the average weight is 3410KG by adopting duplex stainless steel, and the weight reduction is 90KG, therefore, the weight of the container can be reduced by 60 KG-100 KG.
In a preferred embodiment, the duplex stainless steel raw material is S32001 duplex stainless steel.
In the present embodiment, the type S32001 duplex stainless steel, S32001, is preferred as the duplex stainless steel material, and has the following composition characteristics: low carbon, high chromium with nitrogen for nickel, high PREN value; the performance characteristics are as follows: high strength, high elongation and high corrosion resistance.
As can be seen from Table 3, the pitting potential of S32001 is higher than that of QN1803, the pitting corrosion rate is lower than that of QN1803, the data of 5% sulfuric acid and the crystal corrosion D method are obviously lower than that of 304 and QN1803, and the stress corrosion crack initiation and the stress corrosion crack penetration time are obviously longer than that of QN1803, so that S32001 has more excellent corrosion resistance.
When the S32001 is used as the material of the side middle plate, the side edge plate, the door plate, the top plate and the front plate of the 40HC box type, the plate thickness is thinned to 1.42mm from 1.5mm, and the thinning purpose is further achieved.
Furthermore, the coating quality and scratch in the using process of the existing container directly influence the corrosion resistance and service life of the container, and in the invention, the corrosion resistance of the container is mainly embodied by the S32001 duplex stainless steel, and even if the coating is scratched in the using process, the corrosion resistance of the container is not greatly influenced, so that the service life of the container is prolonged, the service life of the container can be prolonged to 50-100 years (the service life of the container in the traditional technology is 10-15 years on average), the production cost of the stainless steel container is reduced, and the economic benefits of the stainless steel container production and application units are improved.
In a preferred embodiment, the container body is subjected to a second surface treatment before the inner surface of the container body is coated with the inner paint and the outer surface of the container body is coated with the finish paint.
In this embodiment, after the container body is assembled, the second surface treatment is performed, and the second surface treatment is performed by sand blasting or shot blasting, so that the paint spraying effect on the container can be better through the second surface treatment.
In a preferred embodiment, the step of applying an inner finish to the interior surface of the container body and applying a finish to the exterior surface comprises:
and spraying inner paint on the inner surface of the container body after the second surface treatment, spraying finish paint on the outer surface, leveling and drying to finish paint spraying on the container body.
In the embodiment, after the second surface treatment is carried out on the container body, the inner paint and the finish paint are respectively sprayed on the inner surface and the outer surface of the container body, and the spraying of the anti-corrosion paint such as zinc powder and the like and the intermediate paint is not needed, so that the cost of the painting process is saved, and only the spraying of the inner paint and the finish paint is needed in the invention, so that the anti-corrosion treatment steps in the painting process are reduced after the painting treatment process is improved, in the aspect of container anti-corrosion, the container mainly depends on the duplex stainless steel material and does not mainly depend on the paint, therefore, even if the paint falls off due to any scratch or other damage in the production and use processes of the container body, the service life of the container body is not greatly influenced, therefore, the container produced by the container body production process has longer service life, the damage resistance is stronger.
Epoxy polyamide zinc phosphate paint and vinyl resin zinc phosphate paint can be used as the inner box paint and the outer box middle layer. The paint outside the box can be modified chlorinated rubber paint or modified vinyl resin paint, and can be thick paste type.
In a preferred embodiment, after the inner surface of the container body is coated with the inner paint and the outer surface is coated with the finish paint, asphalt is sprayed on the bottom of the container body and then the container body is dried.
In the embodiment, the box bottom usually has higher corrosion resistance requirements, and in order to further improve the corrosion resistance of the box bottom, the box bottom is usually provided with asphalt corrosion-resistant paint, and the box bottom needs to be dried after being sprayed with asphalt.
In a preferred embodiment, after the container body is coated with the inner paint and the outer paint, the container body is subjected to sealing, watertight test and container-out inspection.
In the invention, after paint spraying is finished, in order to ensure that the container can be normally used, the container needs to be sealed, a watertight test is carried out after sealing is finished, for a common container, the container is mainly weathertight, and a rubber strip is arranged around a container door to keep watertight, so that water cannot enter the container when raining, an air window is respectively arranged at the upper end parts of the left side plate and the right side plate of the container to allow air in the container to flow through, water cannot enter the container only when raining is kept, good airtight sealing is needed for a refrigerated container, two rubber strips are arranged around the door to keep airtight, and water cannot enter the container when the container is soaked in water.
The inspection for leaving the container is that the commodity inspection organization carries the container cargo, the identification of the container of the exported container cargo and the identification of the unpacking of the imported container cargo, and also comprises the identification of container renting, the identification of container refunding, the identification of the damage of the container cargo and the identification of the cleaning, sealing and refrigerating efficiency of the individually accepted container.
According to the container preparation process, the duplex stainless steel with good corrosion resistance is adopted, and only the inner paint and the finish paint need to be sprayed when the paint is sprayed, so that the cost of the spraying process is reduced, the time is shortened, and the phenomenon that the production rhythm is slowed down or the whole line is paralyzed due to overtime work or careless mistakes caused by multiple spraying is avoided.
Example 2
The embodiment also provides a container prepared by the process in the embodiment 1.
The container in this embodiment is prepared by the process in embodiment 1, on one hand, the container is made of duplex stainless steel, which has good mechanical properties, so that the container has thinner thickness and lighter weight compared with the conventional container made of stainless steel under the same performance, thereby achieving the purpose of thinning and reducing weight, on the other hand, the container is made of duplex stainless steel as a raw material, which has good corrosion resistance, and the corrosion resistance of the container is mainly embodied by duplex stainless steel, thereby the service life of the container is longer, the service life of the container is prolonged, the good performance of the duplex stainless steel is capable of prolonging the service life of the container to 50-100 years (the service life of the container in the conventional technology is 10-15 years on average), and the production cost of the stainless steel container is reduced, the economic efficiency of stainless steel container production and application unit is promoted.
All the above optional technical solutions can be combined arbitrarily to form optional embodiments of the present invention, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A container preparation process is characterized by comprising the following steps:
s1, pretreating the duplex stainless steel raw material;
s2, forming the pretreated duplex stainless steel raw material into parts;
s3, assembling the parts into a container body;
s4, spraying inner paint on the inner surface of the container body, and spraying finish paint on the outer surface of the container body.
2. The process according to claim 1, wherein the pre-treating of duplex stainless steel raw material comprises:
uncoiling the duplex stainless steel raw material, carrying out primary surface treatment, shearing, machining and drying.
3. The process of claim 2, wherein the forming the pre-treated stainless steel stock material into a component part comprises:
and processing and forming the pretreated duplex stainless steel raw material into a post-forming part.
4. The process of claim 3, wherein said assembling the parts into a container body comprises:
and welding the parts once after assembly, performing final assembly after welding once, and then performing secondary welding to form the container body.
5. The process according to any one of claims 1 to 4, the duplex stainless steel raw material being S32001 duplex stainless steel.
6. The process of claim 5, wherein the step of applying the finish to the inner surface of the container body comprises applying a second surface treatment to the container body before applying the finish to the outer surface of the container body.
7. The process of claim 1 or 2, wherein the step of spraying the inner surface of the container body with the inner paint and the outer surface with the finish paint comprises the following steps:
and spraying inner paint on the internal standard of the container body after the second surface treatment, spraying outer paint on the outer surface of the container body, leveling and drying to finish paint spraying on the container body.
8. The process of claim 7, wherein after the inner surface of the container body is coated with the inner paint and the outer surface of the container body is coated with the finish paint, the process further comprises spraying asphalt on the bottom of the container body and drying the container body.
9. The process of claim 8, further comprising sealing the container body, performing a water-tight test, and performing a box-out test after spraying the inner surface and the outer surface of the container body with the inner paint and the outer surface with the finish paint.
10. A container, prepared by the method of any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110676606.7A CN113210238A (en) | 2021-06-16 | 2021-06-16 | Container preparation process and container |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110676606.7A CN113210238A (en) | 2021-06-16 | 2021-06-16 | Container preparation process and container |
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| CN113210238A true CN113210238A (en) | 2021-08-06 |
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