CN1383936A - Continuous production process and apparatus for painting galvanized pipe - Google Patents
Continuous production process and apparatus for painting galvanized pipe Download PDFInfo
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- CN1383936A CN1383936A CN 01115705 CN01115705A CN1383936A CN 1383936 A CN1383936 A CN 1383936A CN 01115705 CN01115705 CN 01115705 CN 01115705 A CN01115705 A CN 01115705A CN 1383936 A CN1383936 A CN 1383936A
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- air
- air knife
- galvanized pipe
- cleaning
- high capacity
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Abstract
The continuous production process of painting galvanized pipe includes the steps of: purification, clearing, stoving and preheating at the curing temperature of paint, painting and curing. The continuous producting apparatus includes well-known apparatus and one stoving and preheating oven added before dip coating trough. The present invention has high production efficiency and high product quality.
Description
The present invention relates to a kind of continuous painting galvanized pipe production technology and equipment thereof.
To the galvanized part surface dye, the technology of application protective organic film has been very ripe, but this stable process can not get effective application on the continuous galvanized pipe of dish load, therefore, can not carry out the japanning production of continuous galvanized pipe in enormous quantities.Its reason is, when continuous galvanized pipe immerses in the dip tank, the surface of galvanized pipe is subjected to hot soaking of coating and covers, the galvanized pipe surface is heated, and causes table, the internal layer of the galvanized pipe inequality of being heated, after coming out from dip tank, the coated feed liquid that is coated with is again less than quick curing on the galvanized pipe surface, therefore the lip-deep coating meeting of galvanized pipe bubble plays tangerine peel, and quality can not get guaranteeing.
The purpose of this invention is to provide a kind of continuous painting galvanized pipe production technology and equipment thereof, adopt technology of the present invention and equipment can not only carry out the japanning production of continuous galvanized pipe in large quantity, and can also guarantee the japanning quality of galvanized pipe, tangerine peel is not played on bubble, surface, and enhances productivity.
For achieving the above object, the present invention takes following technical scheme: a kind of continuous painting galvanized pipe production technology, and this technology comprises the steps: passivation step, cleaning step; The japanning step; Curing schedule is characterized in that: be provided with oven dry before the step in japanning and give hot step, and oven dry is given hot temperature and is the solidification temperature of coating ± 20 outward ℃.Production technology of the present invention is that the chemically treated galvanized pipe of process is heated to a proper temperature through giving hot stove, make body surface rapid draing on the one hand, make the body temperature higher owing to give heat on the other hand, can accelerate face coat when solidifying solidifies, make follow-up high temperature rapid curing not produce bubble and surperficial tangerine peel phenomenon, lay a solid foundation for improving work efficiency.The mode of heating that gives hot stove that the present invention adopts can be resistance heated or Frequency Induction Heating mode.
In production technology of the present invention, be provided with blanching step, cleaning step and staining procedure, cleaning step after passivation step, the cleaning step.If follow-up color is darker, can cancel blanching step, cleaning step.
The continuous employed equipment of painting galvanized pipe production technology of the present invention includes: discharge mechanism, rescue feed mechanism, deactivation slot, spray Cleaning for High Capacity groove, dip tank, curing oven, spray cooling bath, and, it is characterized in that: before dip tank, be provided with oven dry and give hot stove by the arrangement of above-mentioned front and back order linear.
In equipment of the present invention, be provided with bleaching cistern, spray Cleaning for High Capacity groove and staining trough, spray Cleaning for High Capacity groove after described deactivation slot, the spray Cleaning for High Capacity groove.
In equipment of the present invention, be provided with the homogenizing Air knife mechanism after the described dip tank, described homogenizing Air knife mechanism is made up of air knife body and seal, on the air knife body, be provided with several air inlets, the front portion of air knife body is a conical surface shape, uniform several and the corresponding air reservoir of air inlet on the conical surface, and each air reservoir all communicates with several strip air slots that are positioned at conical surface front portion respectively, the seal cover cap is on the air knife body, and the center venthole of seal communicates with each air slot of air knife body.Adopt can the blow off unnecessary coating of galvanized pipe coating surface of homogenizing air knife, can obtain surface coating uniformly.
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is technological process of production figure of the present invention
Fig. 2 is a production process equipment schematic diagram of the present invention (I)
Fig. 3 is a production process equipment schematic diagram of the present invention (II)
Fig. 4 is the front view of air knife body
Fig. 5 is the side view of air knife body
Fig. 6 is homogenizing Air knife mechanism figure
Production process of the present invention as shown in Figure 1, the plate-like material is drawn by the blowing basket, behind aligning, make it become straight line tubing, by the permanent tension force that forms between feeder and the hauling machine, make tubing give heat, japanning, each procedure of curing curing oven by passivation, spray Cleaning for High Capacity, bleaching, spray Cleaning for High Capacity, dyeing, spray Cleaning for High Capacity, oven dry stably.Guarantee that stretcher strain does not take place tubing, then by material collecting device harvest plate-like material.
Technology of the present invention is to have increased oven dry to give hot step on known technology basis, to guarantee the quality of japanning.Whether whether bleaching in addition,, spray Cleaning for High Capacity, dyeing, spray Cleaning for High Capacity step can promptly need dyeing, and be provided with according to the requirement of product.
Equipment of the present invention such as Fig. 2, shown in Figure 3, used equipment is conventional equipment except that the homogenizing Air knife mechanism, respectively following 4 parts.
1, drag part: feed mechanism 2, hydraulic pressure perseverance tension force haulage gear 13 by discharge mechanism 1, adjustable speed form permanent tension force and drag, and are used for determining the processing time of each procedure.Solve the unsettled problem of steadily passing through curing oven 11 of 18 meters long flexible pipes simultaneously.
2, chemical treatment part: form by deactivation slot 3, bleaching cistern 5, staining trough 7 and 3 spray Cleaning for High Capacity rinse baths 4,6,8.The chemical treatment time of several grooves cooperatively interacts, and makes it to become organic whole.Spray Cleaning for High Capacity groove of the present invention cleans according to flowing water and is provided with.Also can adopt the equipment of other circulating water cleaning way.
3, dip-coating part: form by drying and forewarm stove 9, dip tank 10, homogenizing Air knife mechanism 15, curing oven 11, spray cooling body 12.
4, rewinding part: utilize the crooked receiving mechanism 14 of three rods the production tube dish to be become to adapt to the plate-like material of rewinding basket size.
Wherein, bleaching cistern 5, spray Cleaning for High Capacity groove 6, staining trough 7, spray Cleaning for High Capacity groove 8 are according to having or not staining procedure set.As shown in Figure 3, be provided with the said equipment,, can cancel bleaching cistern 5, spray Cleaning for High Capacity groove 6 if color is darker.
The part that drags of the present invention has realized permanent tension force control owing to having utilized the permanent tension force haulage gear 13 of hydraulic pressure.No matter how the tubing speed of service changes, and it follows speed and steadily, has realized that tubing comes out through 18 meters long unsettled curing, the even running of cooling procedure from the dip-coating paint bath, for air knife after the dip-coating provides assurance to effective homogenizing of tube surfaces.The locked rotor characteristic of random time can be provided simultaneously.
Chemical treatment of the present invention partly is that deactivation slot 3, bleaching cistern 5, staining trough 7 are realized thermostatic control, to cooperate the infiltrating time of each cell body inner liquid medicine to tubing.Can realize continuous and automatic processing, be because in deactivation slot, added a kind of fast activating agent, in order to improve passivation reaction speed, in surface passivation and activation process, make galvanizing surface produce strong adsorption activity, and make the surface spread all over electric particle, strengthened dye layer and coating layer adhesive force greatly to body.
Homogenizing Air knife mechanism 15 is to be installed on the outlet slot outer wall of dip tank 10, and homogenizing Air knife mechanism 15 is made up of several groups of different air knives of pressure, and every group of air knife comprises that all the different strip air slot of some directions forms.
As Fig. 4, Fig. 5, shown in Figure 6, described homogenizing Air knife mechanism is made up of air knife body 38 and seal 39, on air knife body 38, be provided with several air inlets 43, the front portion of air knife body 38 is a conical surface shape, uniform several and air inlet 43 corresponding air reservoirs 42 on the conical surface, each air reservoir 42 all communicates with several strip air slots 44 that are positioned at conical surface front portion respectively, on air knife body 38, the center venthole 45 of seal 39 communicates with each air slot 44 of air knife body 38 seal 39 by bolt 41 cover caps.Each air inlet 43, constitute one group of air knife with pairing air reservoir 42 and several strip air slots 44 of being communicated.The homogenizing Air knife mechanism is made up of the air knife that several groups of pressure vary in size.The present invention adopts three groups of air knives that pressure varies in size.The one group of air knife that is positioned at the bottom blows out high pressure air, and pressure is 0.5-0.6mPa, is positioned at the two groups of air knives in top and blows out sub-high pressure compressed air, and pressure is 0.3-0.4mpa.Air admission hole 43 is connected with each self-corresponding compressed air delivery side of pump by the air pressure adjustment controlling organization respectively.Each layout of organizing air knife also is to fully take into account after tubing draws from dip tank, and coating is still uncured, under the gravity effect, must flow from top to bottom, thereby make a large amount of pilings in the tubing bottom, influences the uniformity of tubing coating.According to the relevant theory of hydrodynamics and gravity effect, and the actual conditions of technology.Several groups of air knives are divided into different several sections.The air knife of bottom is in high pressure conditions during work, and the air knife that the top left-right symmetry distributes is in the sub-high pressure state.Each several part blows out the compressed air of different pressures.Three parts are combined, and are derived by the center venthole 45 of the seal 39 of relative tubing.Produce spiral wind in the tubing treatment surface, under this combined helical wind action, the coating of tube surfaces ot-yet-hardened is coated in tube surfaces equably, and cooling knot layer obtains high-quality face coat simultaneously, and the coating that is blown off falls in the feeder.
The homogenizing Air knife mechanism is to be contained on the air cut moving device, air cut moving device can make air knife move forward and backward along the tubing traffic direction, regulate tubing and from dip tank, draw the back to carrying out the time that air knife is handled, so that increase the scope of application of air knife as much as possible, obtain best coating layer thickness and surface quality.The used compressed air of air knife must carry out water outlet and go out oil processing, prevents profit enters influences coating in the coatings tank quality.
Dip-coating part of the present invention, be after being heated to a suitable temperature through chemically treated zinc-plated tubing drying preheating furnace, enter within the dip tank again, 0.1 to 0.2 second time of dip-coating in coating, a large amount of coating is just adhered on the body surface, utilizes air knife that homogenizing is carried out on its surface about 1 second, through the homogenizing air knife blow off the surface unnecessary coating, obtain surface coating uniformly, reach the smooth purpose of its surfacing.
Drying and forewarm stove of the present invention adopts resistance heated or Frequency Induction Heating mode to be heated to a proper temperature, is to determine according to the solidification process of paint film.Main purpose is that coating is solidified fast by the endosexine, shortens the hardening time in curing oven.Realize cooperating with parameter in the chemical treating process.Drying and forewarm temperature=paint solidification temperature ± 20 ℃
Curing oven temperature of the present invention is to adopt the hot setting method, accelerates curing rate, enhances productivity.The solidification temperature of curing oven temperature=coating * (1.2-1.8).Improve work efficiency two, thirtyfold owing to adopt above process to make minute shorten to present 50 ± 10 seconds (about 1 minute) by original twenty or thirty hardening time hardening time.
Because the tubing antiseptic property that the present invention produced is extremely superior, quality is good, and tangerine peel, not bubble are not played in the surface.And with low cost, the efficient height is that at present a lot of accurate tubulation enterprise improves the quality of products, and increases the best method of product variety.
Embodiment 1:
The brake pipe of sedan limousine, petroleum pipeline are that again through method passivation plastic-coated of the present invention, appearance is olive-green through zinc-plated (electroplating or hot dip) by double coiled welded tube.Its production process is as follows: as shown in Figure 2,
Because outer coating paint self is an olive-green, therefore do not need bleaching and painted.Its technological parameter is as follows:
1, speed of service 15m/min
2, the Passivation Treatment prescription is percetage by weight
Sulfuric acid 2.5%
Hydrochloric acid 2.5%
Phosphatase 24 %
Water surplus
30 ℃ of temperature
Time 10S
3, drying and forewarm temperature 160--170 ℃
4, coating Kynoar coating or other fluoro plastic coatings, paint solidification temperature: 160-170 ℃
5, curing oven technological temperature 280--300 ℃ (far infrared)
Hardening time 50--60s
The tubing of producing thus meets Volkswagen's pipe standards after testing fully.
Embodiment 2: simulating golden colour outward appearance tubing production method, technical process is as follows: see Fig. 3.
Adopt double coiled welded tube through zinc-plated (electroplating or hot dip).
1, speed of service 15m/min
2, Passivation Treatment prescription
Chromic anhydride 200-250 grams per liter
Sulfuric acid 10-15 milliliter/liter
Nitric acid 10-30 milliliter/liter
Water surplus
Temperature 10-30 ℃
Time 10-20 second
3, sodium hydrate aqueous solution is adopted in bleaching
Naoh concentration is the 10-30 grams per liter
Time 10-20 second
Temperature 10-40 ℃
4, dyeing
Gold orange II0.4% surplus is a water, is percetage by weight
60 ℃ of temperature
Time 10s
5, bake out temperature is 60 ℃
6, dip-coating clear dope
(nitrocellulose varnish for woodwork)
7, the curing oven technological temperature is 100 ℃
In sum, technology of the present invention and equipment can carry out the japanning production of continuous galvanized pipe in large quantity, and exquisite appearance, and best in quality, tangerine peel is not played on the surface, bubble not, and the work efficiency height, various performances are splendid.
Claims (5)
1, a kind of continuous painting galvanized pipe production technology, this technology comprises the steps: passivation step, cleaning step; The japanning step; Curing schedule is characterized in that: be provided with oven dry before the step in japanning and give hot step, and oven dry is given hot temperature and is the solidification temperature of coating ± 20 outward ℃.
2, continuous painting galvanized pipe production technology according to claim 1 is characterized in that: be provided with blanching step, cleaning step and staining procedure, cleaning step after described passivation step, cleaning step.
3, the described continuous employed equipment of painting galvanized pipe production technology of claim 1, this equipment includes: discharge mechanism, rescue feed mechanism, deactivation slot, spray Cleaning for High Capacity groove, dip tank, curing oven, spray cooling bath, and, it is characterized in that: before dip tank, be provided with oven dry and give hot stove by the arrangement of above-mentioned front and back order linear.
4, equipment according to claim 3 is characterized in that: be provided with bleaching cistern, spray Cleaning for High Capacity groove and staining trough, spray Cleaning for High Capacity groove after described deactivation slot, the spray Cleaning for High Capacity groove.
5, according to claim 3 or 4 described equipment, it is characterized in that: be provided with the homogenizing Air knife mechanism after the described dip tank, described homogenizing Air knife mechanism is made up of air knife body and seal, on the air knife body, be provided with several air inlets, the front portion of air knife body is a conical surface shape, uniform several and the corresponding air reservoir of air inlet on the conical surface, each air reservoir all communicates with several strip air slots that are positioned at conical surface front portion respectively, the seal cover cap is on the air knife body, and the center venthole of seal communicates with each air slot of air knife body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01115705 CN1257020C (en) | 2001-04-29 | 2001-04-29 | Continuous production process and apparatus for painting galvanized pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01115705 CN1257020C (en) | 2001-04-29 | 2001-04-29 | Continuous production process and apparatus for painting galvanized pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1383936A true CN1383936A (en) | 2002-12-11 |
| CN1257020C CN1257020C (en) | 2006-05-24 |
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ID=4662167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01115705 Expired - Fee Related CN1257020C (en) | 2001-04-29 | 2001-04-29 | Continuous production process and apparatus for painting galvanized pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1257020C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480545A (en) * | 2013-09-06 | 2014-01-01 | 浙江巨龙涂装设备有限公司 | Continuous production equipment for simultaneously coating inner and outer walls of multiple pipes |
| CN103480547A (en) * | 2013-09-06 | 2014-01-01 | 浙江巨龙涂装设备有限公司 | Multi-pipe inner-outer-wall simultaneous-plastic-coating continuous-type production process |
| CN111446048A (en) * | 2020-04-07 | 2020-07-24 | 安徽恒明工程技术有限公司 | Enameled wire paint film curing method |
| CN112024337A (en) * | 2020-08-03 | 2020-12-04 | 荆大（荆州）汽车配件有限公司 | Process for coating epoxy resin on surface of galvanized pipe |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950862B (en) * | 2010-09-16 | 2012-01-25 | 上海昕亦电工设备有限公司 | Production method of ground net grounding body protected by hot-dip galvanizing and coating in coordinating manner |
-
2001
- 2001-04-29 CN CN 01115705 patent/CN1257020C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480545A (en) * | 2013-09-06 | 2014-01-01 | 浙江巨龙涂装设备有限公司 | Continuous production equipment for simultaneously coating inner and outer walls of multiple pipes |
| CN103480547A (en) * | 2013-09-06 | 2014-01-01 | 浙江巨龙涂装设备有限公司 | Multi-pipe inner-outer-wall simultaneous-plastic-coating continuous-type production process |
| CN103480547B (en) * | 2013-09-06 | 2016-06-08 | 浙江巨龙涂装设备有限公司 | A kind of multitube inside and outside wall plastic-coated continuous way production technology simultaneously |
| CN103480545B (en) * | 2013-09-06 | 2017-01-25 | 浙江巨龙涂装设备有限公司 | Continuous production equipment for simultaneously coating inner and outer walls of multiple pipes |
| CN111446048A (en) * | 2020-04-07 | 2020-07-24 | 安徽恒明工程技术有限公司 | Enameled wire paint film curing method |
| CN112024337A (en) * | 2020-08-03 | 2020-12-04 | 荆大（荆州）汽车配件有限公司 | Process for coating epoxy resin on surface of galvanized pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1257020C (en) | 2006-05-24 |
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Granted publication date: 20060524 Termination date: 20130429 |