CN108673904A - A kind of copper modeling composite antibacterial pipe production technology - Google Patents
A kind of copper modeling composite antibacterial pipe production technology Download PDFInfo
- Publication number
- CN108673904A CN108673904A CN201810298077.XA CN201810298077A CN108673904A CN 108673904 A CN108673904 A CN 108673904A CN 201810298077 A CN201810298077 A CN 201810298077A CN 108673904 A CN108673904 A CN 108673904A
- Authority
- CN
- China
- Prior art keywords
- copper
- pipe
- machine
- plastic
- molding
- 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
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 129
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 129
- 239000010949 copper Substances 0.000 title claims abstract description 129
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 35
- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 26
- 238000005516 engineering process Methods 0.000 title claims abstract description 22
- 239000004033 plastic Substances 0.000 claims abstract description 39
- 229920003023 plastic Polymers 0.000 claims abstract description 39
- 238000000465 moulding Methods 0.000 claims abstract description 27
- 239000010410 layer Substances 0.000 claims abstract description 22
- 238000005520 cutting process Methods 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 14
- 238000002360 preparation method Methods 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000012856 packing Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000009966 trimming Methods 0.000 claims abstract description 8
- 239000012790 adhesive layer Substances 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims abstract description 5
- 238000004806 packaging method and process Methods 0.000 claims abstract description 4
- 239000011230 binding agent Substances 0.000 claims abstract 2
- 238000005253 cladding Methods 0.000 claims abstract 2
- 239000011324 bead Substances 0.000 claims description 6
- 239000007767 bonding agent Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000003242 anti bacterial agent Substances 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 4
- 238000009413 insulation Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 241000208340 Araliaceae Species 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910001431 copper ion Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 206010023126 Jaundice Diseases 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/083—Supply, or operations combined with supply, of strip material
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
- B29C65/30—Electrical means
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of copper to mould composite antibacterial pipe production technology, and the copper modeling composite antibacterial pipe of preparation includes internal layer copper pipe, adhesive layer and plastic layer；The process of preparation mainly has：Copper strips puts band, copper strip trimming, copper pipe molding, welding, traction, heating, cladding binder, coating plastic, cooling, traction, coding, cutting and packaging；The equipment used when preparation mainly has：Copper strips puts band machine, copper strip trimming machine, molding machine, copper pipe welder, copper pipe dragger, baking oven, bonds coating machine, plastic overmold machine, cooler, ink jet numbering machine, pipe cutting machine and packing machine.The present invention uses relative low price, and the copper strips production copper pipe being readily transported, the pipe length of production not only can carry out custom-made according to the demand of market and client, batch can also be carried out into production, improve production efficiency, production cost is reduced, by adhesive layer in the outer bound plastic, thermal-insulation layer of copper pipe, solves the problems, such as that copper pipe rapid heat dissipation, heat insulating ability are bad.
Description
Technical field
The present invention relates to copper tube production process, especially a kind of copper moulds composite antibacterial pipe production technology.
Background technology
Copper pipe institutional framework is extremely fine and close, and there is impenetrability, the harmful substances such as bacterium, virus and parasite all cannot
Water quality is polluted across it.Biological study shows：Escherichia coli in water supply cannot be further continued for breeding in copper tube, and 99%
Bacterium is thoroughly killed after entering 5 hours of copper tube in above water.There is micro copper ion dissolution in water in copper tube
In, and copper ion has powerful sterilizing ability.Copper pipe quality is hard, not perishable, and high temperature resistant, high pressure resistant, non-aging,
It can be used in a variety of environment.In contrast, it is clear that such as passing by the galvanized steel being mostly used in house the shortcomings that other tubing
The problems such as pipe, easily corrosion, usage time will appear tap water jaundice not long, flow becomes smaller.
Existing copper pipe has the following problems when using and installing：1. pure copper tube is of high cost；2. the installation of pure copper tube
Construction is complicated, and there are leakage points, and welding procedure is complicated, and professional requirements is high, and clamp-press type has that mechanical seal is poor, easy reveals again
The problem of；3. rapid heat dissipation, pure copper tube thermal coefficient is high, when being warm, can generate lime set phenomenon in copper pipe surface, when being cold,
It can lead to fluid thermal loss.
Solution to the problems described above is in technology at present, and copper modeling pipe only uses finished product copper pipe, the plastic material in copper pipe outside
Film.But produced using finished product copper pipe, due to the limitation of production equipment and traffic condition, the length of copper pipe is generally 4 meters or 6
Rice, then will be connected between copper pipe by clamp, realizes so-called continuous production, and the discontinuity of production can be caused, raw
It is only 5 ms/min to produce speed, and efficiency is low, and if the length of copper pipe is more than 6 meters, it is necessary to pipe fitting is used between tubing
Connection, it is possible to breakthrough can be caused, increase pipe fitting cost and construction cost.
Invention content
In order to overcome the defect of copper pipe production cost height, rapid heat dissipation in the prior art, it is compound that the present invention provides a kind of copper modeling
Antibacterial pipe production technology carries out tubular moulding, and online using the relatively cheap copper strips of price by dedicated molding die
It is welded into copper pipe, copper pipe and heat preservation antifungi plastics are linked together by bonding agent.
The present invention is for technical scheme applied to solve the technical problem：A kind of copper modeling composite antibacterial pipe production technology, institute
It includes internal layer copper pipe, adhesive layer and plastic layer to state copper modeling composite antibacterial pipe；
The process of preparation mainly has：Copper strips puts band, copper strip trimming, copper pipe and is molded, welding, traction, heating, coats bonding
Agent, coating plastic, cooling, traction, coding, cutting and packaging；
The equipment used when preparation mainly has：Copper strips puts band machine, copper strip trimming machine, molding machine, copper pipe welder, copper pipe
Dragger, bonds coating machine, plastic overmold machine, cooler, ink jet numbering machine, pipe cutting machine and packing machine at baking oven；
The key step of preparation is as follows：
Copper strips, which is put, to carry out coiled copper strips with machine to put band, and is delivered at bead cutter, and bead cutter is according to the ginseng set
Several to be cut to copper strips, copper strips is transported in the mold in molding machine after the completion of cutting, and welder is to copper strips after demoulding
Volume seam welded, be welded into copper pipe, while dragger draws molding copper pipe, then by after stretching at
Type copper pipe, which is put into baking oven, to be heated, and is put into cohesive coating machine after the completion of heating, in copper pipe surface extrusion bonding agent, then copper pipe
Into plastic overmold machine, insulating plastic pipe layer is coated in outermost layer, it is whole cold that progress in cooling device is put it into after being covered to complete
But, pipe tractor draws copper modeling pipe to ink jet numbering machine after the completion of cooling, ink jet numbering machine to the Copper-plastic Composite Pipe of composite molding into
Row coding, coding rear tubular member are sent to progress cutting of fixed quantity, the finished product after the completion of cutting at pipe cutting machine and are sent to packing machine
Place carries out being packaged into finished product.
Above-mentioned copper moulds composite antibacterial pipe production technology, and dedicated molding die is used in the molding procedure of copper pipe, will
Copper strips carries out tubular moulding, and is welded into copper pipe online.
Above-mentioned copper moulds composite antibacterial pipe production technology, and the plastic material is PVC, PE or PA plastics.
Above-mentioned copper moulds composite antibacterial pipe production technology, and organic antibacterial agent or natural is added in the outer layer insulating plastic pipe
Antiseptic.
Above-mentioned copper moulds composite antibacterial pipe production technology, and the cohesive coating machine and plastic overmold machine use electrical heating side
Formula.
Above-mentioned copper moulds composite antibacterial pipe production technology, and the ink jet numbering machine and packing machine are furnished with infrared sensor, infrared biography
Sensor is connect with computerized control system.
Compared to the prior art, the beneficial effects of the invention are as follows：
Copper modeling composite antibacterial pipe production technology of the present invention uses relative low price, and the copper strips production copper being readily transported
Pipe, the pipe length of production can reach 2000 meters or more, avoid the unnecessary connection between tubing, reduce breakthrough,
Security performance is improved, speed of production is fast, can reach 20 ms/min, and length can be according to the requirement in market and client
It is customized, can also carry out batch into production, production efficiency be improved, to reduce production cost, in addition, existing by adhesive layer
The outer bound plastic, thermal-insulation layer of copper pipe, solves the problems, such as that copper pipe rapid heat dissipation, heat insulating ability are bad.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is present invention process flow diagram；
Fig. 2 is that copper moulds composite antibacterial pipe schematic diagram；
Fig. 3 is that copper moulds composite antibacterial tube section figure.
1. internal layer copper pipe in figure, 2. adhesive layers, 3. plastic layers.
Specific implementation mode
The content of present invention is illustrated with reference to figure, but following embodiment is merely to illustrate the present invention, is not used to
It limits the scope of the invention.
【Embodiment 1】
A kind of copper modeling composite antibacterial pipe production technology, the copper modeling composite antibacterial pipe includes internal layer copper pipe 1,2 and of adhesive layer
Plastic layer 3；
The process of preparation mainly has：Copper strips puts band, copper strip trimming, copper pipe and is molded, welding, traction, heating, coats bonding
Agent, coating plastic, cooling, traction, coding, cutting and packaging；
The equipment used when preparation mainly has：Copper strips puts band machine, copper strip trimming machine, molding machine, copper pipe welder, copper pipe
Dragger, bonds coating machine, plastic overmold machine, cooler, ink jet numbering machine, pipe cutting machine and packing machine at baking oven；
The key step of preparation is as follows：
Copper strips, which is put, to carry out coiled copper strips with machine to put band, and is delivered at bead cutter, and bead cutter is according to the ginseng set
Several to be cut to copper strips, copper strips is transported in the mold in molding machine after the completion of cutting, and welder is to copper strips after demoulding
Volume seam welded, be welded into copper pipe, while dragger draws molding copper pipe, then by after stretching at
Type copper pipe, which is put into baking oven, to be heated, and is put into cohesive coating machine after the completion of heating, in copper pipe surface extrusion bonding agent, is then squeezed again
Go out plastics and coat insulating plastic pipe layer in outermost layer, is put it into after being covered to complete in cooling device and carry out whole cooling, cooled down
Copper modeling pipe is drawn to ink jet numbering machine at rear pipe tractor, ink jet numbering machine carries out coding, spray to the Copper-plastic Composite Pipe of composite molding
Code rear tubular member is sent to progress cutting of fixed quantity, the finished product after the completion of cutting at pipe cutting machine and is sent at packing machine and is packed
At finished product.
Further, dedicated molding die is used in the molding procedure of copper pipe, and copper strips is subjected to tubular moulding, and
Wire bonding is connected into copper pipe.
Further, the plastic material is PVC plastic.
Further, organic antibacterial agent is added in the outer layer insulating plastic pipe.
Further, the cohesive coating machine and plastic overmold machine use Electric heating.
Further, the ink jet numbering machine and packing machine are furnished with infrared sensor, and infrared sensor connects with computerized control system
It connects.
【Embodiment 2】
In the present embodiment, what is used when the main preparation section of copper modeling composite antibacterial pipe production technology, preparation mainly sets
Key step that is standby and preparing is in the same manner as in Example 1, the difference is that：
Further, the plastic material is PE plastics.
Further, natural antibacterial agent is added in the outer layer insulating plastic pipe.
Above example is only exemplary embodiment of the present invention, is not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can within the spirit and scope of the present invention make respectively the present invention
Kind modification or equivalent replacement, this modification or equivalent replacement also should be regarded as being within the scope of the present invention.
Claims (6)
1. a kind of copper moulds composite antibacterial pipe production technology, it is characterised in that：The copper modeling composite antibacterial pipe includes internal layer copper pipe
(1), adhesive layer (2) and plastic layer (3)；
The process of preparation mainly has：Copper strips puts band, copper strip trimming, copper pipe molding, welding, traction, heating, cladding binder, packet
Cover plastics, cooling, traction, coding, cutting and packaging；
The equipment used when preparation mainly has：Copper strips puts band machine, copper strip trimming machine, molding machine, copper pipe welder, copper pipe traction
Machine, bonds coating machine, plastic overmold machine, cooler, ink jet numbering machine, pipe cutting machine and packing machine at baking oven；
The key step of preparation is as follows：
Copper strips, which is put, to carry out coiled copper strips with machine to put band, and is delivered at bead cutter, and bead cutter is according to the parameter pair set
Copper strips is cut, and copper strips is transported in the mold in molding machine after the completion of cutting, volume of the welder to copper strips after demoulding
Seam is welded, and copper pipe is welded into, while dragger draws molding copper pipe, then by the molding copper after stretching
Pipe is put into baking oven and heats, and is put into cohesive coating machine after the completion of heating, in copper pipe surface extrusion bonding agent, then squeezes out modeling again
Material coats insulating plastic pipe layer in outermost layer, is put it into after being covered to complete in cooling device and carries out whole cooling, after the completion of cooling
Pipe tractor draws copper modeling pipe to ink jet numbering machine, and ink jet numbering machine carries out coding to the Copper-plastic Composite Pipe of composite molding, after coding
Pipe fitting is sent to progress cutting of fixed quantity, the finished product after the completion of cutting at pipe cutting machine and is sent at packing machine and is packaged into
Product.
2. copper according to claim 1 moulds composite antibacterial pipe production technology, which is characterized in that in the molding procedure of copper pipe
Using dedicated molding die, copper strips is subjected to tubular moulding, and be welded into copper pipe online.
3. copper according to claim 1 moulds composite antibacterial pipe production technology, which is characterized in that the plastic material be PVC,
PE or PA plastics.
4. copper according to claim 1 moulds composite antibacterial pipe production technology, which is characterized in that in the outer layer insulating plastic pipe
Add organic antibacterial agent or natural antibacterial agent.
5. copper according to claim 1 moulds composite antibacterial pipe production technology, which is characterized in that the cohesive coating machine and modeling
Expect that coating machine uses Electric heating.
6. copper according to claim 1 moulds composite antibacterial pipe production technology, which is characterized in that the ink jet numbering machine and packing machine
Equipped with infrared sensor, infrared sensor is connect with computerized control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810298077.XA CN108673904A (en) | 2018-04-04 | 2018-04-04 | A kind of copper modeling composite antibacterial pipe production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810298077.XA CN108673904A (en) | 2018-04-04 | 2018-04-04 | A kind of copper modeling composite antibacterial pipe production technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108673904A true CN108673904A (en) | 2018-10-19 |
Family
ID=63800744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810298077.XA Pending CN108673904A (en) | 2018-04-04 | 2018-04-04 | A kind of copper modeling composite antibacterial pipe production technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108673904A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1264003A (en) * | 2000-02-01 | 2000-08-23 | 青岛化工学院高分子工程材料研究所 | Apparatus for shaping composite steel-plastics tube |
| CN2447601Y (en) * | 2000-11-10 | 2001-09-12 | 王斌 | Metal and plastic compound tube |
| CN201827532U (en) * | 2010-01-22 | 2011-05-11 | 李志雄 | Oxygen blocking metal composite pipe production equipment |
-
2018
- 2018-04-04 CN CN201810298077.XA patent/CN108673904A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1264003A (en) * | 2000-02-01 | 2000-08-23 | 青岛化工学院高分子工程材料研究所 | Apparatus for shaping composite steel-plastics tube |
| CN2447601Y (en) * | 2000-11-10 | 2001-09-12 | 王斌 | Metal and plastic compound tube |
| CN201827532U (en) * | 2010-01-22 | 2011-05-11 | 李志雄 | Oxygen blocking metal composite pipe production equipment |
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|---|---|---|---|
| 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: 20181019 |
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| RJ01 | Rejection of invention patent application after publication |