CN107244049A - A kind of preventing water leakage machine barrel and its preparation technology for double screw extruder - Google Patents
A kind of preventing water leakage machine barrel and its preparation technology for double screw extruder Download PDFInfo
- Publication number
- CN107244049A CN107244049A CN201710441598.1A CN201710441598A CN107244049A CN 107244049 A CN107244049 A CN 107244049A CN 201710441598 A CN201710441598 A CN 201710441598A CN 107244049 A CN107244049 A CN 107244049A
- Authority
- CN
- China
- Prior art keywords
- machine barrel
- water channel
- screw extruder
- double screw
- water leakage
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/58—Details
- B29C45/62—Barrels or cylinders
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/04—Electroplating with moving electrodes
- C25D5/06—Brush or pad plating
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of preventing water leakage machine barrel and its preparation technology for double screw extruder, the preventing water leakage machine barrel includes machine barrel body and water channel, and water channel inwall is coated with anti-corrosion layer, water channel provided with capping, and capping is welded in water channel by sealing；Preparation technology includes step：(1) machine barrel water channel is processed；(2) anti-corrosion layer is set in water channel inwall；(3) stainless steel capping is placed in water channel groove；(4) soldering and sealing welding is carried out to the water channel for putting stainless steel capping；(5) workpiece being welded is subjected to destressing processing, stove is cold.Present invention process is obtained to be used for the preventing water leakage machine barrel of double screw extruder, by in one layer of antirust corrosion resistant nickel coating of water channel inwall brush plating, effectively prevent machine barrel water channel corrosion, corrosion-damaged in use, it ensure that the service life of machine barrel, active demand of the market to product service life and quality is met, production cost is reduced.
Description
Technical field
The present invention relates to a kind of extruder barrel, more particularly to a kind of preventing water leakage machine barrel for double screw extruder and its
Preparation technology.
Background technology
In recent years, China has become plastics machinery big producer of the world, and its development speed is with creating major economic indicators
Come out at the top in 194 industries of mechanical industry.Along with the continuous expansion of plastics machinery application field in recent years, such as eat
The emerging application field such as product, medicine, wherein especially being risen with the yield of plastic extrusion machinery and sales volume very fast.At present, China
Double screw extruder is the visual plant of plastic blend processing, is widely used in waved plastic pipe production and processing.
The most material of machine barrel housing of dual-screw pelletizer currently on the market is carbon steel, and water channel uses ordinary carbon steel plug
Plus common welding manner soldering and sealing production.After welding weld seam easily produce be mingled with, the defect such as stomata, and in use due to water
The corrosion-damaged of rust often results in barrel end face leak in use for some time, and can not use or scrap and cause to stop production.
Routinely the machine barrel service life of technique productions is 0.5-1, water channel will leak after corrosion, or even scrap, have a strong impact on
The normal operation of enterprise's production.
Therefore, how the problem of being deposited for above-mentioned existing dual-screw pelletizer machine barrel, provide one kind and disclosure satisfy that machine barrel
Normal service condition sewer is water-tight and machine barrel of service life length, as those skilled in the art's technology urgently to be resolved hurrily
Problem.
The content of the invention
The technical problems to be solved by the invention are for twin-screw for drawbacks described above of the prior art there is provided one kind
The preventing water leakage machine barrel of extruder.
The present invention uses following technical scheme to solve above-mentioned technical problem：
One side of the invention provides a kind of preventing water leakage machine barrel for double screw extruder, including machine barrel body 1
With water channel 3, the inwall of water channel 3 is coated with anti-corrosion layer 6, the water channel 3 provided with capping 4, and the capping 4 is welded by sealing 5
It is connected in the water channel 3.
Further, in the described preventing water leakage machine barrel for double screw extruder, the anti-corrosion layer 6 plates for nickel
Layer, copper coating or nickel-phosphorus alloy coating.
Further, in the described preventing water leakage machine barrel for double screw extruder, the thickness of anti-corrosion layer 6 is
0.02-0.2mm。
It is further preferred that in the described preventing water leakage machine barrel for double screw extruder, the thickness of anti-corrosion layer 6
For 0.05-0.15mm.
Further more preferably, in the described preventing water leakage machine barrel for double screw extruder, the anti-corrosion layer 6
Thickness is 0.08-0.12mm.
Further, in the described preventing water leakage machine barrel for double screw extruder, the capping 4 is stainless steel
Matter, its thickness is 3-5mm.
It is further preferred that in the described preventing water leakage machine barrel for double screw extruder, the capping 4 is stainless steel
Material, its thickness is 3.5-4.5mm.
Further, in the described preventing water leakage machine barrel for double screw extruder, the sealing 5 is stainless steel
Matter, its thickness is 3-5mm.
It is further preferred that in the described preventing water leakage machine barrel for double screw extruder, the sealing 5 is stainless steel
Material, its thickness is 3.2-3.8mm.
Further, in the described preventing water leakage machine barrel for double screw extruder, 4 outer faces of the capping are provided with
Groove 7, the sealing 5 is embedded in the groove 7.
The second aspect of the invention provides a kind of preparation technology of preventing water leakage machine barrel for double screw extruder, tool
Body comprises the following steps：
(1) machine barrel water channel is processed, and water channel is heated to 220-250 DEG C, 1-3 hours are incubated, dehydration is deoiled；
(2) anti-corrosion layer, anti-corrosion layer thickness 0.02-0.1mm are set in water channel inwall；
(3) stainless steel capping is placed in the water channel groove with anti-corrosion layer, and it is fixed；
(4) using the mechanical hand of automatic welding and stainless steel electrode, soldering and sealing welding is carried out to the water channel for putting stainless steel capping,
Form sealing；
(5) workpiece being welded is put into incubator and carries out weld seam tempering destressing processing, holding temperature 220-250,
Time 2 h, stove is cold.
Further, in the described preparation technology for the preventing water leakage machine barrel of double screw extruder, the step (2)
In in water channel inwall set anti-corrosion layer mode be Brush Plating, electrophoresis or electro-deposition.
Further, in the described preparation technology for the preventing water leakage machine barrel of double screw extruder, the step (2)
Middle anti-corrosion layer is nickel coating, copper coating or nickel-phosphorus alloy coating.
Further, in the described preparation technology for the preventing water leakage machine barrel of double screw extruder, the step (2)
Middle anti-corrosion layer is, with decay resistance stronger ni base alloy coating or Co-based alloy coating, to set resistance in water channel inwall
The mode of corrosion layer is detonation flame spraying or curtain coating coating.
Further, it is described corrosion-resistant in the described preparation technology for the preventing water leakage machine barrel of double screw extruder
Thickness degree is 0.05-0.08mm.
Further, in the described preparation technology for the preventing water leakage machine barrel of double screw extruder, the step (5)
Middle incubator temperature is 500-650 DEG C.
The present invention uses above technical scheme, compared with prior art, has the following technical effect that：
The present invention is used for the preventing water leakage machine barrel of double screw extruder, by the way that in the anti-corrosion layer of water channel inwall brush plating one, this is resistance to
Corrosion layer has that bond strength is high, covering is uniform, coating compactness is good, along with the antirust corrosion resistant feature of anti-corrosion layer, prevents
Machine barrel water channel corrosion, corrosion-damaged in use, it is ensured that the service life of machine barrel；The preventing water leakage machine barrel is normally used
In the case of 2-3 be not in water leakage situation；Therefore, the preventing water leakage machine barrel service life is greatly improved, and meets market to production
The active demand that product service life and quality are improved constantly, reduces the use cost of client and shuts down cost.
Brief description of the drawings
Overall structure figures of the Fig. 1 for the present invention for the preventing water leakage machine barrel of double screw extruder；
Closure construction figures of the Fig. 2 for the present invention for the preventing water leakage machine barrel of double screw extruder；
Sealed structure charts of the Fig. 3 for the present invention for water channel in the preventing water leakage machine barrel of double screw extruder；
Closure construction figures of the Fig. 4 for the present invention for a kind of preferred embodiment in the preventing water leakage machine barrel of double screw extruder；
Water channel sealing structures of the Fig. 5 for the present invention for a kind of preferred embodiment in the preventing water leakage machine barrel of double screw extruder
Figure；
Wherein, 1- machine barrels body, 2- bushings, 3- water channels, 4- cappings, 5- soldering and sealing, 6- anti-corrosion layers, 7- grooves.
Embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings.
As Figure 1-3, the embodiments of the invention provide a kind of preventing water leakage machine barrel for double screw extruder, including machine
Cylinder body 1, the bushing 2 and water channel 3 that are arranged in machine barrel body 1, the inwall of water channel 3 are coated with anti-corrosion layer 6, antirust corrosion resistant nickel plating
Layer 6 has provided with capping 4 in the features such as bond strength is high, covering is uniform, coating compactness is good, water channel 3, and capping 4 passes through sealing 5
It is welded in water channel 3, by one layer of antirust corrosion resistant nickel coating of water channel inwall brush plating, effectively reducing machine barrel water in use
It is road corrosion, corrosion-damaged, it is ensured that the service life of machine barrel.
As an optimal technical scheme of embodiment, it is used for the preventing water leakage machine barrel of double screw extruder, corrosion resistant at this
It is nickel coating, copper coating or nickel-phosphorus alloy coating to lose layer 6, and nickel coating, copper coating or nickel-phosphorus alloy coating have antirust corrosion resistant special
Point；Preferably, the thickness of anti-corrosion layer 6 is 0.02-0.2mm；More preferably, the thickness of anti-corrosion layer 6 is 0.05-0.15mm；More
For preferably, the thickness of anti-corrosion layer 6 is 0.08-0.12mm, further effectively prevent machine barrel in use water channel corrosion,
It is corrosion-damaged, it is ensured that the service life of machine barrel.
As an optimal technical scheme of embodiment, it is used for the preventing water leakage machine barrel of double screw extruder, capping 4 at this
For stainless steel, its thickness is 3-5mm；Preferably, the thickness of capping 4 is 3.5-4.5mm；More preferably, the thickness of capping 4
Spend for 3.8-4.2mm.In addition, sealing 5 is similarly stainless steel, its thickness is 3-5mm；Preferably, the thickness of sealing 5 is
3.2-3.8mm；More preferably, the thickness of sealing 5 is 3.4-3.5mm.The weldering of stainless steel is used on the outer face of capping 4
Bar carries out sealing-in and forms sealing 5, it is ensured that the controllability of welding process and the quality of sealing.Because capping 4 and sealing 5 are used
Stainless steel material, was welded into the generation in the absence of oxide inclusion, substantially increased the reliability of the internal soundness of sealing 5 and steady
It is qualitative.
As illustrated in figures 4-5, as a preferred embodiment of the present invention, on the basis of above-mentioned technical proposal, the leakproof
The outer face of capping 4 of water dispenser cylinder is provided with groove 7, and sealing 5 is embedded in groove 7 so that sealing 5 is closely connected with capping 4
It is integrated, it is ensured that the reliability of cylinder in use.The preventing water leakage machine barrel of the present embodiment also will not in use
Cause weld seam to damage leak because of corrosion, it is ensured that the reliability of cylinder in use, and substantially increase cylinder
Service life reduces the cylinder use cost and shutdown loss of client, has filled up dual-screw pelletizer machine barrel and has manufactured work
A defect in skill.
In addition, present invention also offers a kind of preparation technology of the preventing water leakage machine barrel for double screw extruder, specific bag
Include step：(1) water channel 3 of machine barrel body 1 is processed in place by drawing by design drawing requirement and is heated to 220-
250 dehydrations of insulation 1-3 hours are deoiled；(2) preservative treatment, sets anti-corrosion layer, anti-corrosion layer thickness 0.02- in water channel inwall
0.1mm, the anti-corrosion layer is made by nickel coating or by nickel-bass alloy material or Co-base alloy material；(3) according to different size
Size is required to cover diel on design water channel 3 and customized；(4) require to seal using diel according to different specification size
The punch forming of lid 4；(5) stamping forming capping 4 is positioned in the water channel groove with anti-corrosion layer processed, and it is fixed；
(6) tail end of water channel 3 that will put the machine barrel body 1 of capping 4 well carries out soldering and sealing weldering using the mechanical hand of automatic welding and stainless steel electrode
Connect, form sealing 5；(7) workpiece being welded is put into incubator and carries out weld seam tempering destressing processing, holding temperature 220-
250, time 2 h, stove is cold, produces the preventing water leakage machine barrel for double screw extruder.
An optimal technical scheme as the present invention for the preparation technology of the preventing water leakage machine barrel of double screw extruder, institute
It is to be set in water channel inwall in nickel coating, copper coating or nickel-phosphorus alloy coating, the step (2) to state in step (2) anti-corrosion layer
The mode of anti-corrosion layer is put for Brush Plating, electrophoresis or electro-deposition, or other any water channel inwalls that may be implemented in set anti-corrosion layer
Mode.Or in the step (2) anti-corrosion layer for have in the prior art the stronger ni base alloy coating of decay resistance or
Co-based alloy coating, it is detonation flame spraying or curtain coating coating that the mode of anti-corrosion layer is set in water channel inwall.The anti-corrosion layer
Thickness is 0.05-0.08mm, and preferably nickel coating.And incubator temperature is 500-650 DEG C in the step (5), is entered
After the tempering destressing processing of row weld seam, then at 220-250 DEG C of soaking time 2 hours, stove was cold.
Compared to routinely technique productions machine barrel using 0.5-1 or so water channels will leak after corrosion, even scrap
2-3 is not in water leakage situation under defect, the normal service condition of machine barrel of the invention, with longer service life；This is prevented
Leak machine barrel greatly improves machine barrel service life, is met market and use the longevity to product using unique machining process
The active demand that life and quality are improved constantly, reduces the use cost of client and shuts down cost.
The specific embodiment of the present invention is described in detail above, but it is only used as example, and the present invention is not intended to limit
In particular embodiments described above.To those skilled in the art, it is any to the practicality carry out equivalent modifications and replace
In generation, is also all among scope of the invention.Therefore, the equalization made without departing from the spirit and scope of the invention is converted and repaiied
Change, all should be contained within the scope of the invention.
Claims (10)
1. a kind of preventing water leakage machine barrel for double screw extruder, including machine barrel body (1) and water channel (3), it is characterised in that institute
State water channel (3) inwall to be coated with anti-corrosion layer (6), the water channel (3) provided with capping (4), the capping (4) passes through sealing (5)
It is welded in the water channel (3).
2. the preventing water leakage machine barrel according to claim 1 for double screw extruder, it is characterised in that the anti-corrosion layer
(6) it is nickel coating, copper coating or nickel-phosphorus alloy coating.
3. the preventing water leakage machine barrel according to claim 1 for double screw extruder, it is characterised in that the anti-corrosion layer
(6) thickness is 0.02-0.2mm.
4. the preventing water leakage machine barrel according to claim 1 for double screw extruder, it is characterised in that the capping (4)
For stainless steel, its thickness is 3-5mm.
5. the preventing water leakage machine barrel according to claim 1 for double screw extruder, it is characterised in that the sealing (5)
For stainless steel, its thickness is 3-5mm.
6. the preventing water leakage machine barrel according to claim 1 for double screw extruder, it is characterised in that the capping (4)
Outer face is provided with groove (7), and the sealing (5) is embedded in the groove (7).
7. a kind of preparation technology for the preventing water leakage machine barrel for being used for double screw extruder as described in claim any one of 1-6, it is special
Levy and be, comprise the following steps：
(1) machine barrel water channel is processed, and water channel is heated to 220-250 DEG C, 1-3 hours are incubated, dehydration is deoiled；
(2) anti-corrosion layer, anti-corrosion layer thickness 0.02-0.2mm are set in water channel inwall；
(3) stainless steel capping is placed in the water channel groove with anti-corrosion layer, and it is fixed；
(4) using the mechanical hand of automatic welding and stainless steel electrode, soldering and sealing welding is carried out to the water channel for putting stainless steel capping, formed
Sealing；
(5) workpiece being welded is put into incubator and carries out weld seam tempering destressing processing, holding temperature 220-250, time 2
Hour, stove is cold.
8. the preventing water leakage machine barrel according to claim 7 for double screw extruder, it is characterised in that the step (2)
In in water channel inwall set anti-corrosion layer mode be Brush Plating, electrophoresis or electro-deposition.
9. the preventing water leakage machine barrel according to claim 7 for double screw extruder, it is characterised in that the step (2)
Middle anti-corrosion layer is nickel coating, copper coating or nickel-phosphorus alloy coating.
10. the preventing water leakage machine barrel according to claim 7 for double screw extruder, it is characterised in that the step (5)
Middle incubator temperature is 500-650 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710441598.1A CN107244049A (en) | 2017-06-13 | 2017-06-13 | A kind of preventing water leakage machine barrel and its preparation technology for double screw extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710441598.1A CN107244049A (en) | 2017-06-13 | 2017-06-13 | A kind of preventing water leakage machine barrel and its preparation technology for double screw extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107244049A true CN107244049A (en) | 2017-10-13 |
Family
ID=60018014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710441598.1A Pending CN107244049A (en) | 2017-06-13 | 2017-06-13 | A kind of preventing water leakage machine barrel and its preparation technology for double screw extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107244049A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108247285A (en) * | 2017-12-12 | 2018-07-06 | 武汉重工铸锻有限责任公司 | A kind of pressure test cylinder sealing surface anticorrosion treatment technology |
| CN111496483A (en) * | 2020-05-18 | 2020-08-07 | 上海红重机械装备有限公司 | Manufacturing method of multifunctional steel structure |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0316713A (en) * | 1989-06-14 | 1991-01-24 | Kobe Steel Ltd | Multiple-spindle cylinder provided with water cooling jacket for kneading/extruding molding device and its manufacture |
| JPH11198215A (en) * | 1997-11-17 | 1999-07-27 | Toshiba Mach Co Ltd | Barrel, and its manufacture |
| CN201269372Y (en) * | 2008-10-09 | 2009-07-08 | 杭州市特种设备检测院 | Soldering connection structure of aluminum and aluminum alloy pipe |
| CN201597175U (en) * | 2010-01-27 | 2010-10-06 | 浙江巨化股份有限公司 | High-temperature resistant corrosion-resistant twin-screw extruder barrel body |
| CN104329560A (en) * | 2014-09-03 | 2015-02-04 | 钢铁研究总院 | Corrosion-resistant composite section bar and preparation method thereof |
| CN104493330A (en) * | 2014-11-11 | 2015-04-08 | 中国石油天然气集团公司 | Circumferential weld butt welding method of double-metal composite pipe |
| CN204547029U (en) * | 2015-04-07 | 2015-08-12 | 浙江精宏机械有限公司 | A kind of novel short flat diplopore bimetal cylinder |
| CN205202086U (en) * | 2015-12-28 | 2016-05-04 | 桂林橡胶设计院有限公司 | Straight antithetical couplet supplies to glue extruder |
| CN105599273A (en) * | 2015-08-05 | 2016-05-25 | 四川中旺科技有限公司 | Water pipe pre-embedded extruder barrel and extruder |
| CN105922539A (en) * | 2016-06-27 | 2016-09-07 | 天津镁制螺杆机电科技有限公司 | Sealed single-end spiral double screw |
| CN206825854U (en) * | 2017-06-13 | 2018-01-02 | 苏州艾盾合金材料有限公司 | A kind of preventing water leakage machine barrel for double screw extruder |
-
2017
- 2017-06-13 CN CN201710441598.1A patent/CN107244049A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0316713A (en) * | 1989-06-14 | 1991-01-24 | Kobe Steel Ltd | Multiple-spindle cylinder provided with water cooling jacket for kneading/extruding molding device and its manufacture |
| JPH11198215A (en) * | 1997-11-17 | 1999-07-27 | Toshiba Mach Co Ltd | Barrel, and its manufacture |
| CN201269372Y (en) * | 2008-10-09 | 2009-07-08 | 杭州市特种设备检测院 | Soldering connection structure of aluminum and aluminum alloy pipe |
| CN201597175U (en) * | 2010-01-27 | 2010-10-06 | 浙江巨化股份有限公司 | High-temperature resistant corrosion-resistant twin-screw extruder barrel body |
| CN104329560A (en) * | 2014-09-03 | 2015-02-04 | 钢铁研究总院 | Corrosion-resistant composite section bar and preparation method thereof |
| CN104493330A (en) * | 2014-11-11 | 2015-04-08 | 中国石油天然气集团公司 | Circumferential weld butt welding method of double-metal composite pipe |
| CN204547029U (en) * | 2015-04-07 | 2015-08-12 | 浙江精宏机械有限公司 | A kind of novel short flat diplopore bimetal cylinder |
| CN105599273A (en) * | 2015-08-05 | 2016-05-25 | 四川中旺科技有限公司 | Water pipe pre-embedded extruder barrel and extruder |
| CN205202086U (en) * | 2015-12-28 | 2016-05-04 | 桂林橡胶设计院有限公司 | Straight antithetical couplet supplies to glue extruder |
| CN105922539A (en) * | 2016-06-27 | 2016-09-07 | 天津镁制螺杆机电科技有限公司 | Sealed single-end spiral double screw |
| CN206825854U (en) * | 2017-06-13 | 2018-01-02 | 苏州艾盾合金材料有限公司 | A kind of preventing water leakage machine barrel for double screw extruder |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108247285A (en) * | 2017-12-12 | 2018-07-06 | 武汉重工铸锻有限责任公司 | A kind of pressure test cylinder sealing surface anticorrosion treatment technology |
| CN108247285B (en) * | 2017-12-12 | 2019-09-17 | 武汉重工铸锻有限责任公司 | A kind of pressure test cylinder sealing surface anticorrosion treatment technology |
| CN111496483A (en) * | 2020-05-18 | 2020-08-07 | 上海红重机械装备有限公司 | Manufacturing method of multifunctional steel structure |
| CN111496483B (en) * | 2020-05-18 | 2022-07-08 | 上海红重机械装备有限公司 | Manufacturing method of multifunctional steel structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102873466A (en) | Flux-cored wire, production method and application of flux-cored wire | |
| CN107244049A (en) | A kind of preventing water leakage machine barrel and its preparation technology for double screw extruder | |
| CN104384859A (en) | Production method for nickel base alloy N06625 composite seamless steel pipe | |
| CN101642843A (en) | Flange resurfacing welding method | |
| CN206825854U (en) | A kind of preventing water leakage machine barrel for double screw extruder | |
| CN105171345A (en) | Preparation method for high-wear-resistance and repairable conical double cylinders | |
| CN112077537A (en) | Preparation method of large-caliber stainless steel JCOE welded pipe | |
| CN203875461U (en) | Bi-metal metallurgical composite pipe obtained through four welding processes | |
| CN212666870U (en) | Long service life's steel for building structure | |
| CN207961759U (en) | A kind of three layers of metallurgical composite pipe | |
| CN202901596U (en) | Air conditioner connecting pipe | |
| CN201875295U (en) | Steel-plastic composite hot water pipe | |
| CN210484952U (en) | Externally-coated steel-plastic composite wear-resistant elbow | |
| CN206185346U (en) | Self -protected flux -cored wire | |
| CN105909818B (en) | A kind of corrosion resistant ball valve and preparation method thereof | |
| CN212080379U (en) | End face and port double-enhanced double-sealing device of metal plastic composite pipe | |
| CN201597175U (en) | High-temperature resistant corrosion-resistant twin-screw extruder barrel body | |
| CN202348834U (en) | Stainless steel-coated stroke detection piston rod and hydraulic cylinder with same | |
| CN110657288A (en) | Metal-plastic composite pipe system and manufacturing method thereof | |
| CN204062190U (en) | A kind of dual-metal clad steel pipe | |
| CN205877554U (en) | Reinforce type elbow | |
| CN109759778A (en) | A kind of corrosion resistant alloy composite three-way pipe fitting production method | |
| CN201310684Y (en) | Tungsten-plating alloy seamless-tube mandrel | |
| CN206465461U (en) | A kind of new FDM formulas 3D printer material leak-proof nozzle | |
| CN212107237U (en) | High-strength steel pipe |
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 | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Peng Gangjun Inventor after: Wang Xingui Inventor before: Wang Xingui |
|
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171013 |