CN112009638A - Fender anti-impact device and manufacturing method thereof - Google Patents
Fender anti-impact device and manufacturing method thereof Download PDFInfo
- Publication number
- CN112009638A CN112009638A CN202010875408.9A CN202010875408A CN112009638A CN 112009638 A CN112009638 A CN 112009638A CN 202010875408 A CN202010875408 A CN 202010875408A CN 112009638 A CN112009638 A CN 112009638A
- Authority
- CN
- China
- Prior art keywords
- fender
- manufacturing
- plate
- workpiece
- impact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B59/00—Hull protection specially adapted for vessels; Cleaning devices specially adapted for vessels
- B63B59/02—Fenders integral with waterborne vessels or specially adapted therefor, e.g. fenders forming part of the hull or incorporated in the hull; Rubbing-strakes
-
- 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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/06—Applying particulate materials
-
- 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
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
-
- 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
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/007—After-treatment
-
- 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
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0272—After-treatment with ovens
-
- 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
- B05D7/24—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 for applying particular liquids or other fluent materials
-
- 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
- B05D7/24—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 for applying particular liquids or other fluent materials
- B05D7/26—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 for applying particular liquids or other fluent materials synthetic lacquers or varnishes
-
- 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
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
-
- 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
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/546—No clear coat specified each layer being cured, at least partially, separately
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
A fender impact prevention device comprises an impact prevention plate and a fender panel arranged on the impact prevention plate through a fastening bolt; the fender panel comprises a rubber plate and a steel plate embedded into the rubber plate and playing a skeleton role. A method for manufacturing the fender impact prevention device, comprising the following steps: (1) manufacturing the impingement plate: step 1: impingement plate main body manufacturing, process 2: pretreatment, step 3: electrostatic spraying, step 4: high-temperature curing, step 5: discharging and cooling, and step 6: spraying ultraviolet protective paint; (2) manufacturing of the fender panel: step 1: manufacturing the fender panel body, and step 2: spraying polyurethane on the surface, and (3) assembling a fender anti-impact device. The fender scour prevention device and the manufacturing method thereof have the advantages of advanced process, good corrosion resistance, good curing effect, safety, reliability and long service life, play a role in buffering the ship body and protect the paint surface of the ship body from being damaged. Can be widely applied to fender anti-impact equipment.
Description
Technical Field
The invention relates to a fender anti-impact device and a manufacturing method thereof, which can be widely applied to fender anti-impact equipment.
Background
The conventional fender impact prevention device comprises an impact prevention plate and a fender panel. The common impingement plate has the anticorrosion measure that epoxy zinc-rich antirust paint is sprayed on the surface of the steel plate. The treatment mode is mainstream in the industry, and due to poor anti-corrosion measures, the paint surface is worn by the fender in the parking process, the seawater corrosion is serious, the corrosion is serious after 5 years, the service life is short, and the safety of ship parking is seriously influenced. The common fender panel is made of high-molecular polyethylene plates, is hard in texture, is easy to damage the paint surface of a ship body in the ship berthing process, and increases the maintenance cost.
Disclosure of Invention
The invention aims to provide a fender scour prevention device which has the advantages of advanced process, good corrosion resistance, good curing effect, safety, reliability, long service life, buffering effect on a ship body and protection of a paint surface of the ship body from being damaged, and a manufacturing method thereof.
The fender impact prevention device comprises an impact prevention plate which is arranged on a rubber fender through a fastener and has an anti-corrosion effect, and a fender panel which is arranged on the impact prevention plate through a fastening bolt; the fender panel comprises a rubber plate and a steel plate embedded into the rubber plate and playing a skeleton role.
In order to achieve the purpose, the invention provides a manufacturing method of a fender impact prevention device, which comprises the following steps:
(1) impingement baffle manufacture
Step 1: impingement baffle body manufacturing
Manufacturing the impingement plate main body by a steel plate welding process;
and a step 2: pretreatment
The pretreatment process sequentially comprises the following steps: removing oil, rust, phosphorization and passivation, removing oil stain, dust and rust on the surface of the impingement plate workpiece, and generating a layer of phosphorization layer which is corrosion resistant and can increase the adhesive force of the sprayed coating on the surface of the impingement plate workpiece;
step 3: electrostatic spraying
The method comprises the following steps of uniformly spraying plastic powder coating on the surface of a fender workpiece by adopting an electrostatic spraying machine and utilizing an electrostatic adsorption principle under the action of an electric field, wherein powder can be uniformly adsorbed on the surface of the fender workpiece to form a powder coating;
and step 4: high temperature curing
Pushing the sprayed impingement plate workpiece into a curing furnace, heating to a preset temperature of 180-190 ℃, preserving heat for 13-17 minutes, and baking the powder coating at a high temperature to be leveled and cured to be melted into a compact protective coating which is firmly attached to the surface of the workpiece;
step 5: cooling after discharging
The discharging cooling is a process of cooling the result of the plastic spraying process to return the impingement plate workpiece to a normal temperature;
step 6: ultraviolet protective paint spraying
Finally, ultraviolet protective paint is sprayed on the surface of the impingement plate workpiece to prevent the paint surface from aging and discoloring due to ultraviolet irradiation and protect the paint surface from being corroded;
(2) fender panel manufacturing
Step 1: fender panel body fabrication
Embedding an internal steel plate into a rubber vulcanized material by adopting a flat vulcanizing machine forming device, and performing pressure forming to prepare a fender panel main body;
and a step 2: surface sprayed polyurethane
Spraying a polyurethane coating with a protective effect on the surface of the fender panel main body;
(3) fender scour protection device assembly
And (3) fastening the fender and the fender panel together through a fastening bolt, and finishing the manufacture of the fender finished product.
The invention relates to a fender erosion prevention device and a manufacturing method thereof, wherein the working principle of electrostatic spraying of an erosion prevention plate workpiece is as follows: charging plastic powder through high-voltage electrostatic equipment, spraying the coating on the surface of a workpiece under the action of an electric field, and uniformly adsorbing the powder on the surface of the impingement plate workpiece to form a powdery coating; the powdery coating is leveled and solidified after being baked at high temperature, and plastic particles can be melted into a layer of compact final protective coating with different effects, so that the protective coating is firmly attached to the surface of a workpiece, and the solidification effect is good.
The fender scour protection device and the manufacturing method thereof have the advantages that the fender workpiece adopts a perfect plastic spraying surface treatment method, and compared with the common paint spraying surface treatment, the technology has advanced process, good corrosion resistance, safety and reliability. The surface of the impingement plate subjected to plastic spraying treatment is smooth and glossy, the anti-corrosion effect is obviously improved, the anti-corrosion life can reach 20 years, and the service life is long.
According to the fender impact prevention device and the manufacturing method thereof, the fender panel is made of the rubber plate, polyurethane is sprayed on the surface of the fender panel, a high-molecular polyethylene plate in the traditional technology is replaced, the hardness of the fender panel is reduced, a buffering effect is achieved on a ship body, the paint surface of the ship body is protected from being damaged, and the ship body is long in service life.
According to the fender scour prevention device and the manufacturing method thereof, oil stain, dust and rust on the surface of a workpiece of the fender are removed, a uniform and rough phosphate coating which is not easy to rust is generated, and not only can rust and corrosion be prevented, but also the adhesive force of a plastic spraying layer can be increased.
The invention relates to a fender impact-proof device and a manufacturing method thereof.A layer of powder coating is uniformly sprayed on the surface of an impact-proof plate workpiece by utilizing the electrostatic adsorption principle; the fallen powder is recovered by a recovery system and can be reused after being screened.
The invention relates to a fender scour prevention device and a manufacturing method thereof.A curing furnace consists of a heating and control system and a heat preservation box body, wherein the heating and control system comprises various heating modes of electric heating, fuel oil, fuel gas and coal.
In conclusion, the fender impact prevention device and the manufacturing method thereof have the advantages of advanced process, good corrosion resistance, good curing effect, safety, reliability and long service life, play a role in buffering the ship body, and protect the paint surface of the ship body from being damaged.
Drawings
The invention will be further described with reference to the accompanying drawings and examples thereof.
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
In fig. 1, the fender impact-proof device of the invention comprises an impact-proof plate 1 which is arranged on a rubber fender 4 through a fastener and has an anti-corrosion effect, and a fender panel which is arranged on the impact-proof plate through a fastening bolt; the fender panel comprises a rubber plate 2 and a steel plate 3 which is embedded into the rubber plate and plays a skeleton role.
In fig. 1, a quay 5.
The invention discloses a manufacturing method of a fender impact prevention device, which comprises the following steps:
(1) impingement baffle manufacture
Step 1: impingement baffle body manufacturing
Manufacturing the impingement plate main body by a steel plate welding process;
and a step 2: pretreatment
The pretreatment process sequentially comprises the following steps: removing oil, rust, phosphorization and passivation, removing oil stain, dust and rust on the surface of the impingement plate workpiece, and generating a layer of phosphorization layer which is corrosion resistant and can increase the adhesive force of the sprayed coating on the surface of the impingement plate workpiece;
step 3: electrostatic spraying
The method comprises the following steps of uniformly spraying plastic powder coating on the surface of a fender workpiece by adopting an electrostatic spraying machine and utilizing an electrostatic adsorption principle under the action of an electric field, wherein powder can be uniformly adsorbed on the surface of the fender workpiece to form a powder coating;
and step 4: high temperature curing
Pushing the sprayed impingement plate workpiece into a curing furnace, heating to a preset temperature of 180-190 ℃, preserving heat for 13-17 minutes, and baking the powder coating at a high temperature to be leveled and cured to be melted into a compact protective coating which is firmly attached to the surface of the workpiece;
step 5: cooling after discharging
The discharging cooling is a process of cooling the result of the plastic spraying process to return the impingement plate workpiece to a normal temperature;
step 6: ultraviolet protective paint spraying
Finally, ultraviolet protective paint is sprayed on the surface of the impingement plate workpiece to prevent the paint surface from aging and discoloring due to ultraviolet irradiation and protect the paint surface from being corroded;
(2) fender panel manufacturing
Step 1: fender panel body fabrication
Embedding an internal steel plate into a rubber vulcanized material by adopting a flat vulcanizing machine forming device, and performing pressure forming to prepare a fender panel main body;
and a step 2: surface sprayed polyurethane
Spraying a polyurethane coating with a protective effect on the surface of the fender panel main body;
(3) fender scour protection device assembly
And (3) fastening the fender and the fender panel together through a fastening bolt, and finishing the manufacture of the fender finished product.
In view of the foregoing, while the preferred embodiments of the present invention have been described, it is to be understood that the invention is not limited to the precise embodiments described above, and that equipment and structures not described in detail are understood to be practiced in a manner that is conventional in the art; any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention by those skilled in the art can be made without departing from the technical scope of the present invention, and still fall within the protection scope of the technical solution of the present invention.
Claims (2)
1. A fender impact-proof device is characterized by comprising an impact-proof plate which is arranged on a rubber fender through a fastener and has an anti-corrosion effect, and a fender panel which is arranged on the impact-proof plate through a fastening bolt; the fender panel comprises a rubber plate and a steel plate embedded into the rubber plate and playing a skeleton role.
2. A method for manufacturing the fender of claim 1, comprising the steps of:
(1) impingement baffle manufacture
Step 1: impingement baffle body manufacturing
Manufacturing the impingement plate main body by a steel plate welding process;
and a step 2: pretreatment
The pretreatment process sequentially comprises the following steps: removing oil, rust, phosphorization and passivation, removing oil stain, dust and rust on the surface of the impingement plate workpiece, and generating a layer of phosphorization layer which is corrosion resistant and can increase the adhesive force of the sprayed coating on the surface of the impingement plate workpiece;
step 3: electrostatic spraying
The method comprises the following steps of uniformly spraying plastic powder coating on the surface of a fender workpiece by adopting an electrostatic spraying machine and utilizing an electrostatic adsorption principle under the action of an electric field, wherein powder can be uniformly adsorbed on the surface of the fender workpiece to form a powder coating;
and step 4: high temperature curing
Pushing the sprayed impingement plate workpiece into a curing furnace, heating to a preset temperature of 180-190 ℃, preserving heat for 13-17 minutes, and baking the powder coating at a high temperature to be leveled and cured to be melted into a compact protective coating which is firmly attached to the surface of the workpiece;
step 5: cooling after discharging
The discharging cooling is a process of cooling the result of the plastic spraying process to return the impingement plate workpiece to a normal temperature;
step 6: ultraviolet protective paint spraying
Finally, ultraviolet protective paint is sprayed on the surface of the impingement plate workpiece to prevent the paint surface from aging and discoloring due to ultraviolet irradiation and protect the paint surface from being corroded;
(2) fender panel manufacturing
Step 1: embedding an internal steel plate into a rubber vulcanized material by adopting a flat vulcanizing machine forming device, and performing pressure forming to prepare a fender panel main body;
and a step 2: spraying a polyurethane coating with a protective effect on the surface of the fender panel main body;
(3) fender scour protection device assembly
And (3) fastening the fender and the fender panel together through a fastening bolt, and finishing the manufacture of the fender finished product.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010875408.9A CN112009638A (en) | 2020-08-27 | 2020-08-27 | Fender anti-impact device and manufacturing method thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010875408.9A CN112009638A (en) | 2020-08-27 | 2020-08-27 | Fender anti-impact device and manufacturing method thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
CN112009638A true CN112009638A (en) | 2020-12-01 |
Family
ID=73503620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202010875408.9A Pending CN112009638A (en) | 2020-08-27 | 2020-08-27 | Fender anti-impact device and manufacturing method thereof |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN112009638A (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6187420B1 (en) * | 1997-07-23 | 2001-02-13 | Sumitomo Rubber Industries, Ltd. | Fender |
EP2309061A2 (en) * | 2009-10-09 | 2011-04-13 | V.M. S.p.a. | Pier or dock fender |
CN202559298U (en) * | 2012-01-17 | 2012-11-28 | 大连巅峰橡胶机带有限公司 | Arch-shaped rubber fender device with embedded steel plates |
CN202787188U (en) * | 2012-08-23 | 2013-03-13 | 上海宝松重型机械工程(集团)有限公司 | Fender board |
KR101302461B1 (en) * | 2013-05-16 | 2013-09-02 | (주) 화승엑스윌 | Manufacturing method for cone type fender |
CN204139126U (en) * | 2014-09-15 | 2015-02-04 | 广州海宁橡胶有限公司 | A kind of Novel tapered rubber fender structure |
CN205381372U (en) * | 2016-01-12 | 2016-07-13 | 欧伦(大连)船业有限公司 | D type fender |
-
2020
- 2020-08-27 CN CN202010875408.9A patent/CN112009638A/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6187420B1 (en) * | 1997-07-23 | 2001-02-13 | Sumitomo Rubber Industries, Ltd. | Fender |
EP2309061A2 (en) * | 2009-10-09 | 2011-04-13 | V.M. S.p.a. | Pier or dock fender |
CN202559298U (en) * | 2012-01-17 | 2012-11-28 | 大连巅峰橡胶机带有限公司 | Arch-shaped rubber fender device with embedded steel plates |
CN202787188U (en) * | 2012-08-23 | 2013-03-13 | 上海宝松重型机械工程(集团)有限公司 | Fender board |
KR101302461B1 (en) * | 2013-05-16 | 2013-09-02 | (주) 화승엑스윌 | Manufacturing method for cone type fender |
CN204139126U (en) * | 2014-09-15 | 2015-02-04 | 广州海宁橡胶有限公司 | A kind of Novel tapered rubber fender structure |
CN205381372U (en) * | 2016-01-12 | 2016-07-13 | 欧伦(大连)船业有限公司 | D type fender |
Non-Patent Citations (1)
Title |
---|
吴清一,靳伟: "《中国托盘手册 第2版》", 30 November 2014 * |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6444232B2 (en) | Maintenance painting method for steel structure and circulating blasting device | |
CN100564572C (en) | Metal parts surface defects is repaired and antiseptic method | |
EP1679388A1 (en) | Method of thermal spraying | |
JP2002303272A (en) | Compressor having protective coating and compressor coating method | |
CN103124802A (en) | Process for conditioning the surface of hardened sheet-steel components which are protected against corrosion | |
CN106634643A (en) | Surface treatment method capable of increasing bonding performance of metal and silicone rubber | |
CN105542660A (en) | Hot-melt type protective wax composition | |
CN112009638A (en) | Fender anti-impact device and manufacturing method thereof | |
CN101153398A (en) | Corrosion-resistant break-resistant steel rail or steel wheel of train | |
CN106436500A (en) | Guide rail for magnetic suspension and preparation method thereof | |
WO2017141823A1 (en) | Preventive maintenance construction method for steel structure, and circulation-type blasting device used in said method | |
US7682667B2 (en) | Method of thermal spraying | |
CN105463442A (en) | Method for repairing part size through supersonic NiCrAlY coating spraying | |
CN105483560B (en) | Coal mine hydraulic supporting column bore area stainless steel protective coating and coating processes | |
Khorasanizadeh | The effects of shot and grit blasting process parameters on steel pipes coating adhesion | |
JP6924480B2 (en) | Steel bridge maintenance method | |
JP6501718B2 (en) | Preventive maintenance method of existing steel bridge | |
US12037691B2 (en) | Method of compacting an anti-corrosive paint of a turbine engine part | |
CN104227356A (en) | Manufacture method of rigidity seal ball valve | |
CN110144538B (en) | Composite thermal spraying repair method for surface of hydraulic support upright post | |
CN103882365A (en) | Preparation method of surface compound coating for guide rail of large measuring machine | |
CN107858075B (en) | Adhesive liquid and paint spraying method for applying adhesive liquid to surface of LED backboard | |
JPH09268503A (en) | Corrosion-resistant rail and manufacture thereof | |
EP1598444B1 (en) | Process to adjust the electric conductivity of a coating on a machine component by dry ice blasting, the electric conductivity being variable by pressure | |
CN113696103B (en) | Long-service-life steel rail treatment method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201201 |
|
RJ01 | Rejection of invention patent application after publication |