CN110303702A - Resin material production method based on the stretching method that hangs down vertically again - Google Patents
Resin material production method based on the stretching method that hangs down vertically again Download PDFInfo
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- CN110303702A CN110303702A CN201910465048.2A CN201910465048A CN110303702A CN 110303702 A CN110303702 A CN 110303702A CN 201910465048 A CN201910465048 A CN 201910465048A CN 110303702 A CN110303702 A CN 110303702A
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- tubing
- hangs down
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- felt
- down vertically
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Classifications
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- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/56—Tensioning reinforcements before or during shaping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D22/00—Producing hollow articles
Abstract
The present invention provides a kind of resin material production methods based on the stretching method that hangs down vertically again, first sequentially arrange each equipment of production of resins line from top to bottom by production sequence, open up coaxial processing channel at each machining area center；Then it is drawn past the raw material of prestressed stretch-draw using traction device, so that its processing channel along the vertical direction is passed sequentially through each process equipment, obtains sold resin tubing.The present invention thoroughly solves the problems, such as that epoxy immerses insufficient and interlayer bubble by the Design of Production Line of vertical structure, guarantees the completion of cure of epoxy resin tubing, improves pipe workpiece quality.
Description
Technical field
The present invention relates to production of resins technical field, specifically a kind of resin material production based on the stretching method that hangs down vertically again
Method.
Background technique
It is well known that product made of glass fiber reinforced epoxy resin (or unsaturated polyester (UP)) is also known as epoxy resin
Tubing, high temperature resistant corrosion-resistant with its, radiation hardness and density is small, rigidity is good, intensity is high are widely used in national defence, industrial and agricultural production
In people's daily life, as guided missile shell case and satellite fairing, the heat insulation material of spaceship, aircraft and naval vessel shell
Body, fin and propeller etc., glass fiber reinforced epoxy resin (or unsaturated polyester (UP)) product are mainly used in civilian industry
In pressure vessels and pipes, anticorrosion container, automobile instrument panel, bumper, electrical insulation, yacht etc., glass fiber reinforcement epoxy
When tree (or unsaturated polyester (UP)) product is mainly used for various pipelines, production technology is mainly included on glass fibre and coats
Epoxy resin (perhaps unsaturated polyester (UP)) will be coated with the glass of epoxy resin (or unsaturated polyester (UP)) by pressure roller and winding axis
Glass fiber is wound layer by layer, after thickness to be wound reaches the requirement of tube wall, glass fiber reinforced epoxy resin (or insatiable hunger
And polyester) shell i.e. produce, then carry out hot setting, final production tube can be obtained.But in production process
In, during the most common problem is wound around, since air exists, and bubble or cavity is formed in interlayer, seriously affect production
Quality and performance cause product qualification rate not high, and production cost increases.And glass fibre after carrying out sizing step away from
From winding roller, there are also a distances, in this section in transmission process, often will appear the phenomenon that glue is aggregated, cause in the later period
Glue is unevenly distributed in the overshoot of winding, will appear small gas chamber in tube wall after carrying out drying and processing, these are all serious
Influence the product quality and service life of production tube
Another is common for pulling pultrusion technique, and the reinforcing materials such as felt, cloth, continuous zero twisted yarn are mainly passed through infiltration tree
Rouge then by pipe mold, then is pulled through dragger, to continuously produce the unrestricted epoxy resin of length
The products such as tubing.
The mechanical strength of epoxy resin is mainly to be determined by fiber, and the main function of matrix resin is that each bundle fiber is glued
Knot together, carries out the transmitting of ess-strain.If bonding bad between resin and fiber, will result in stress cannot be effective
It transmits between the fibers, it is difficult to play the effect that fiber undertakes Main Load.
Below by taking the application of epoxy resin in insulating pole tower and petrochemical pipe as an example:
One, insulating pole tower:
In recent years, due to the expansion of glass fiber compound material application field, with it is its it is light-weight, intensity is high, anti-gas
Wait the excellent characteristics such as aging, corrosion resistance be strong, power communication field of power transmission have glass fiber compound material is used for it is defeated
In the products such as electric pole, tower, the insulating properties of route can be increased substantially, greatly improves the resistance to pollution flashover of route, ice sudden strain of a muscle, wind-deviation, resistance to
Thunder is horizontal.The performance of composite material transmission tower and use are gradually by the attention of power domain.
And be mostly at present single rod type by the shaft tower of composite Materials Design, conveying voltage class is confined to 35KV or less.
Higher voltage grade can not be still applicable in, and the particular/special requirement of high pressure level is not achieved in bearing capacity, thus makes composite material pole tower
Development is restricted.
Two, petrochemical pipe:
The more steel pipeline anti-corrision layer of domestic application has asphalt, PE jacket and PE foam jacket, epoxide coal bituminous, coal tar
Oily enamel paint, epoxy powder and three-layer composite structure etc., promoting and applying two kinds of most wide pipeline corrosion protection modes at present is three-decker
Polyolefin erosion resistant coating and single layer powder epoxy.
(1) asphalt coating, the erosion resistant coating are to utilize glass fabric after pitch immersion treatment, are placed on defeated
The outer wall of oil-piping plays antisepsis.The technical matters comparative maturity, the prices of raw materials needed are cheap, at the same material and
The source of ingredient is easy, extensively.But the material heat-resisting quantity is lower, has high-hydroscopicity, due to having sucked more moisture, meeting
The antiseptic property of material is reduced, due also to the influence of the factors such as surrounding enviroment, will also result in the decline of anti-corrosion effect straight line.And labor
Dynamic condition is poor, and quality is difficult to ensure, environmental pollution is serious.
(2) epoxide coal bituminous, it is easy to operate, but coating curing time is long, and it is affected by environment big, it is unsuitable for field work
Industry, 10 DEG C or less are difficult to construct.
(3) clinkery epoxy powder corrosion-inhibiting coating, since clinkery epoxy powder corrosion-inhibiting coating is strong, resistance to steel tube surface cohesion
Chemical mediator erosion performance, heat resistance etc. are all relatively good, corrosion resistance, the fissility of resistance to cathode, resistance to ag(e)ing, the stress of resistance to soil
Etc. performances it is also fine, the wide of use temperature range but coating is relatively thin, anti-sharp object impact force is poor, easily by impact failure.
(4) epoxy powder anti-corrosion, using electrostatic spraying mode, good with same material corrosion-resistant tube body clinkering, bonding force is strong,
But epoxy powder waterproofness is poor, and (water absorption rate is higher, reaches 0.83%), certain difficulty is brought to cathodic Protection Design.Scene
Utensil requires height, and operation difficulty is big, and quality is not easy to control.
(5) polyolefin erosion resistant coating is divided to double-layer structure and two kinds of three-decker.The bottom of double-layer structure is adhesive, outer layer
For polyethylene;The bottom of three-decker is epoxy coating, and middle layer is adhesive, and surface layer is polyethylene.In three-decker
Epoxy coating can be liquid epoxy coating, be also possible to epoxide powder coating.
The major advantage of two-layer structure polyolefin erosion resistant coating is that insulation resistance is high, anti-stray current is good, easy for construction,
Major defect is that spiral shape overlapping the slot is long, easily coheres failure in lap-joint's generation and forms corrosive medium and penetrate into.
Layer polyethylene system erosion resistant coating, pipeline corrosion protection leakproofness is strong, and high mechanical strength, waterproofness is strong, and quality is stablized, and applies
Work is convenient, and applicability is good, free from environmental pollution.PE water absorption rate is low (being lower than 0.01%), is provided simultaneously with epoxy intensity height, PE water imbibition
Low and hot melt adhesive flexibility is good etc., there is very high anti-corrosion reliability, the disadvantage is that: cost height, complex process.
Currently, epoxy resin producing line is semi-automatic growth line both at home and abroad, production method is that horizontal life is horizontal, due to sky
Gas exists, and forms bubble or cavity in interlayer；The gravity generated due to terrestrial gravitation, the resin meeting of mold upper layer infiltration
Automatically it flows downward and causes upper layer resin few, to easily cause tubing upper and lower level wall thickness inconsistent, cause bias, so that
Tubing intensity is affected.
Summary of the invention
The present invention in order to solve problems in the prior art, it is raw to provide a kind of resin material based on the stretching method that hangs down vertically again
Production method thoroughly solves the problems, such as that epoxy immerses insufficient and interlayer bubble by the stretching method that hangs down vertically again, guarantees epoxy resin pipe
The completion of cure of material improves pipe workpiece quality.
The present invention is first sequentially arranged each equipment of production of resins line by production sequence from top to bottom, at each machining area center
Open up coaxial processing channel；Then it is drawn past the raw material of prestressed stretch-draw using traction device, makes it along the vertical direction
Processing channel pass sequentially through each process equipment, obtain sold resin tubing.
Detailed process the following steps are included:
1) by band tensioning cloth holder, band tensioning creel, band tensioning felt frame, prestressed stretch-draw is carried out to cloth, yarn, felt.
2) under the traction of traction device, by inner core die, resin liquid will be passed through by the yarn, cloth, felt of prestressed stretch-draw
Pond is immersed, the second layer is downwardly into.
3) pass through three sets of winding traffic cycles outside internal model and repeatedly wind cloth and add felt, after immersing pond again by resin liquid
Into in external mold mold, interior external mold is heating and curing molding simultaneously, then passes through baking oven heating and carry out solidifying and setting.
4) tubing after solidifying and setting is polished and is cleaned, dust is carried out by dust gathering arrester in polishing and cleaning process
Processing.
5) tubing after cleaning is molded, cooling cutting, obtains finished product tubing after injection molding.
It is further improved, the yarn, felt, cloth are basalt polymer fiber material, and the epoxy resin immerses
Immersion fluid is AG80 epoxy resin in pond.
The beneficial effects of the invention are that:
1, it thoroughly solves the problems, such as that epoxy immerses insufficient and interlayer bubble by the stretching method that hangs down vertically again, guarantees epoxy resin tubing
Completion of cure, improve pipe workpiece quality.
2, the production line can be used for producing ordinary epoxy resin tubing simultaneously, the case where slightly improving production cost
Under, increase exponentially the performance of tubing.
3, the production that epoxy resin tubing is carried out using the mating AG80 epoxy resin of basalt macromolecular fibre, insulate,
High temperature resistant, the good, intensity of rigidity is big, anti-corrosion, acidproof, anti-aging, has excellent performance.
4, prestressed stretch-draw is first carried out to yarn, cloth, felt etc. before production, improves rigidity of tubing itself, reduces vibration and bullet
Property deformation do so the elastic strength that can be obviously improved tension module, keep the resistance of script stronger.
5, the New insulated pipe applications field produced is extensive, can be in electric system for high-intensitive ultralight insulation work
Utensil, insulating pole tower, insulation arm；Various pipelines can be used in petrochemical industry；It can be used for civilian pressure vessel, anti-corrosion is held
Device, automobile instrument panel and bumper etc..
6, the development of full-automatic basalt macromolecule composite resin material production line is pioneering for the whole world, fills up related
The blank in field is world lead level.
Detailed description of the invention
Fig. 1 is the specific device structure schematic diagram that the present invention uses.
Fig. 2 is inner membrance shaping area and external mold shaping area structural schematic diagram.
Fig. 3 is surface treatment plot structure schematic diagram.
Fig. 4 is towing area structural schematic diagram.
Fig. 5 is injection molding cooling zone and cutting area structural schematic diagram.
Fig. 6 is finished product laydown area structural schematic diagram.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
It is produced using technique of the invention, a kind of specific equipment used is as shown in Figure 1, include being distributed vertically
The 12 layers of machining area separated by floor face 17, machining area center are provided with coaxial processing channel, and traction device is vertically led
Draw the processing channel completion processing that raw material pass sequentially through each machining area.The machining area successively includes interior from top to bottom
Film shaping area, external mold shaping area, solidifying and setting area, surface treatment area, towing area, injection molding cooling zone, cutting area and finished product are stacked
Area.Whole height is 67m, and equipment bottom configures 30 meters of deep-wells.
The inner membrance shaping area of first layer and the second layer is with external mold molding plot structure as shown in Fig. 2, machining area top is set
It is equipped with waste gas treatment equipment 1.It is provided with sliding rail hanging beam 2 at the top of inner membrance shaping area, bottom is provided with epoxy resin and immerses pond 7, sliding
It is equipped on rail hanging beam across the liftable heart mould 6 coaxial with processing channel；If 6 surrounding of liftable heart mould is distributed with
Band tensioning cloth holder 3 is done, with tensioning creel 5 and with tensioning felt frame 4, with tensioning cloth holder, with tensioning creel and on tensioning felt frame
Yarn, felt, cloth are downwardly into external mold shaping area across the formation internal model 9 of pond 7 is immersed by inner core die.The external mold shaping area packet
It includes winding traffic cycle 8, the epoxy resin being sequentially distributed from top to bottom around processing channel and immerses pond 7 and outer mold 10, it is described to twine
Several band tensioning cloth holders 3 are distributed with around 8 surrounding of traffic cycle and with tensioning felt frame 4.
Tubing 18 is pulled out from outer mold 10, into solidifying and setting area (third layer and the 4th floor be baking oven) solidifying and setting.
Enter layer 5 surface Sanding Area after solidifying and setting, is polished by sander 12 its surface.Enter the after the completion of polishing
Six layer surface clear areas, clean tube surfaces by cleaning device 13.Layer 5 and layer 6, which are configured with, to be covered in tubing
The dust gathering arrester 11 of outer rim.As shown in Figure 3.
After the completion of polishing cleaning, into towing area, hydraulic haulage equipment 19 pulls tubing, is pulled into the 9th layer downwards.
(layer 7 and the 8th layer, as shown in Figure 4).9th layer is equipped with PE injection molding machine 14 and corresponding cooling bay 15.Outside insulated pipes used
Layer injection molding high intensity PE.After the completion of outer injection, into the tenth layer of full-automatic cutting equipment 16(), fixed length cutting, such as Fig. 5 are carried out
Shown in.
It is further improved, the laydown area bottom is provided with 30m deep-well hole.It is fallen into deep-well after the completion of tubing cutting,
Rear other side is hung out in undermost laydown area 20, as shown in Figure 6.
It is further improved, the yarn, felt, cloth are basalt polymer fiber material, and the epoxy resin immerses
Immersion fluid is AG80 epoxy resin in pond.Epoxy resin tubing is carried out using the mating AG80 epoxy resin of basalt macromolecular fibre
Production, insulation, high temperature resistant, the good, intensity of rigidity is big, anti-corrosion, acidproof, anti-aging, has excellent performance.
Add offense's method as follows using the device:
1) by band tensioning cloth holder, band tensioning creel, band tensioning felt frame, prestressed stretch-draw is carried out to cloth, yarn, felt.
2) under the traction of traction device, by inner core die, resin liquid will be passed through by the yarn, cloth, felt of prestressed stretch-draw
Pond is immersed, the second layer is downwardly into.
3) pass through three sets of winding traffic cycles outside internal model and repeatedly wind cloth and add felt, after immersing pond again by resin liquid
Into in external mold mold, interior external mold is heating and curing molding simultaneously, then passes through baking oven heating and carry out solidifying and setting.
4) tubing after solidifying and setting is polished and is cleaned, dust is carried out by dust gathering arrester in polishing and cleaning process
Processing.
5) tubing after cleaning is molded, cooling cutting, obtains finished product tubing after injection molding.
The novel high-strength basalt macromolecule composite pipe produced in this way, outer injection PE thoroughly solve asphalt mixtures modified by epoxy resin
Rouge tubing durability, anti-aging problem；The novel one vertical stretching method that hangs down again, thoroughly there are tubing bias for the horizontal stretching method of solution
Problem；The use of basalt macromolecular fibre and AG80 Formulaion of epoxy resin improves the electric property and mechanical performance of tubing.
It is able to satisfy the demand of power transformation intelligent things Web robot's insulation arm material completely.
The novel high-strength insulating materials market produced by full-automatic basalt macromolecule composite resin material production line
It is widely used, such as electric system and petrochemical industry.
One, electric system:
In electric system, master is to be used the following aspects:
1. insulating pole tower
The strength and stiffness of electric power line pole tower substantial amounts, novel basalt epoxy resin tubing are entirely capable of more than 45# steel
Performance indicator.Insulating pole tower can be made with it completely, due to its own insulation, the matched fitting of shaft tower, insulator are significantly
It reduces；The production of basalt epoxy resin tubing can be used in the cross-arm of Large Steel tower, can greatly reduce cross-arm up and down in this way
Between safety clearance distance, to reduce the height of whole shaft tower.By taking the steel tube tower of 220kV as an example, by using insulator crossarm,
Can 8 meters of smaller safety clearance distance, total height can decline 8 meters, and ground, steel etc. greatly reduce, while without insulation
Son, purchase cost substantially reduce.
Shaft tower in all parts of the country is countless, after insulating pole tower or insulator crossarm, substantially reduces its purchase cost, simultaneously
Reduce insulator, fitting etc., it is corrosion-resistant, high-quality, insulation is non-conductive, substantially reduce its maintenance cost.The market prospects
It is wide.
2. live line tool
Service without power-off is the inexorable trend of power network development at present, and live line tool is service without power-off requirement.It is novel profound
Military rock epoxy resin tubing, can with high temperature resistant, mechanical strength is big, rigidity is good, electric insulation is excellent, meeting livewire work safety
In the case where it is required that, weight is a quarter of current epoxy resin tubing, substantially increases the operability of tool, can mention
High operating efficiency.
3. insulation arm
At present the country used in aerial lift device with insulated arm be mostly import, even if having part bucket arm vehicle be it is domestic, insulation arm is also state
Outer import.A set of insulation arm price is differed with voltage class difference, price 50,000 to 300,000, and each power supply company, county is according to need
To match at least 4 aerial lift device with insulated arm.Insulation arm made by the novel high-strength insulating materials of company's research is guaranteeing performance
Meanwhile price only needs the half of import price, market is more huge.National 2000 counties Duo Ge, with 10 just in case set is calculated,
Estimated amount is 1,000,000,000.
Two, petrochemical industry:
China will create 20,000 kilometers of all kinds of conveyance conduits every year on average, and oil pipeline construction will welcome new climax.This is new
The pipeline that type ring oxygen resin tubing is made, intensity is high, it is corrosion-resistant, non-maintaining, heavy caliber can be made, petroleum can be met completely
Chemical pipeline demand.Compared with the pipeline on existing market, in the case where same price, intensity, it is corrosion-resistant far superior to
Existing glass reinforced plastic, steel pipe etc., the product have huge market prospects.
There are many concrete application approach of the present invention, the above is only a preferred embodiment of the present invention, it is noted that for
For those skilled in the art, without departing from the principle of the present invention, it can also make several improvements, this
A little improve also should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of resin material production method based on the stretching method that hangs down vertically again, it is characterised in that including following procedure: first will tree
Each equipment of rouge production line is sequentially arranged from top to bottom by production sequence, opens up coaxial processing channel at each machining area center；
Then it is drawn past the raw material of prestressed stretch-draw using traction device, passes sequentially through its processing channel along the vertical direction respectively
Process equipment obtains sold resin tubing.
2. a kind of resin material production method based on the stretching method that hangs down vertically again, it is characterised in that the distraction procedure is specifically wrapped
Include following steps:
1) by band tensioning cloth holder, band tensioning creel, band tensioning felt frame, prestressed stretch-draw is carried out to cloth, yarn, felt；
2) it under the traction of traction device, by inner core die, will be immersed across resin liquid by the yarn, cloth, felt of prestressed stretch-draw
Pond is downwardly into the second layer；
3) pass through three sets of winding traffic cycles outside internal model and repeatedly wind cloth and add felt, enter after immersing pond again by resin liquid
In external mold mold, interior external mold is heating and curing molding simultaneously, then passes through baking oven heating and carry out solidifying and setting；
4) tubing after solidifying and setting is polished and is cleaned；
5) tubing after cleaning is molded, cooling cutting, obtains finished product tubing after injection molding.
3. the resin material production method according to claim 2 based on the stretching method that hangs down vertically again, it is characterised in that: described
Yarn, felt, cloth be basalt polymer fiber material, it is AG80 asphalt mixtures modified by epoxy resin that the epoxy resin, which immerses immersion fluid in pond,
Rouge.
4. the resin material production method according to claim 1 or 2 based on the stretching method that hangs down vertically again, it is characterised in that:
The machining area top is provided with waste gas treatment equipment.
5. the resin material production method according to claim 2 based on the stretching method that hangs down vertically again, it is characterised in that: step
4) dust processing is carried out by dust gathering arrester in the polishing and cleaning process described in.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910465048.2A CN110303702A (en) | 2019-05-30 | 2019-05-30 | Resin material production method based on the stretching method that hangs down vertically again |
| PCT/CN2019/104977 WO2020237900A1 (en) | 2019-05-30 | 2019-09-09 | Composite material production line and production method based on vertical gravity tension method |
| CA3141580A CA3141580A1 (en) | 2019-05-30 | 2019-09-09 | Composite material production line and production method based on vertical gravity tensioning method |
| ZA2021/09191A ZA202109191B (en) | 2019-05-30 | 2021-11-17 | Composite material production line and production method based on vertical gravity tensioning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910465048.2A CN110303702A (en) | 2019-05-30 | 2019-05-30 | Resin material production method based on the stretching method that hangs down vertically again |
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| CN110303702A true CN110303702A (en) | 2019-10-08 |
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| CN201910465048.2A Pending CN110303702A (en) | 2019-05-30 | 2019-05-30 | Resin material production method based on the stretching method that hangs down vertically again |
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| CN114311735A (en) * | 2021-07-23 | 2022-04-12 | 江苏芯安新材料科技有限公司 | Production method of conical electric wire tower production line |
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| CN111604974B (en) * | 2020-03-31 | 2021-12-31 | 蒋文君 | Sinking and floating material breaking method for insulating tower production line based on vertical heavy vertical tension method |
| CN114311735A (en) * | 2021-07-23 | 2022-04-12 | 江苏芯安新材料科技有限公司 | Production method of conical electric wire tower production line |
| CN114311735B (en) * | 2021-07-23 | 2023-08-18 | 江苏芯安新材料科技有限公司 | Production method of conical wire pole tower production line |
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