CN106239939A - The pultrusion equipment of a kind of thermoplastics composite material section bar and forming method thereof - Google Patents
The pultrusion equipment of a kind of thermoplastics composite material section bar and forming method thereof Download PDFInfo
- Publication number
- CN106239939A CN106239939A CN201610634186.5A CN201610634186A CN106239939A CN 106239939 A CN106239939 A CN 106239939A CN 201610634186 A CN201610634186 A CN 201610634186A CN 106239939 A CN106239939 A CN 106239939A
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- China
- Prior art keywords
- section bar
- composite material
- pultrusion
- shaping
- guider
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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
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/521—Pultrusion, i.e. forming and compressing by continuously pulling through a die and impregnating the reinforcement before the die
-
- 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
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
-
- 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
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
- B29C70/526—Pultrusion dies, e.g. dies with moving or rotating parts
-
- 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
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
- B29C70/528—Heating or cooling
Abstract
The present invention relates to pultrusion equipment and the forming method thereof of a kind of thermoplastics composite material section bar, it belongs to thermoplastic composite production and processing technical field.The present invention is with glass and chemical fiber blended fabrics as raw material, forming method comprises the following steps: first, glass and chemical fiber blended fabrics are drawn from identical tension creel, enter preheating oven through front guider to preheat, shaping mould is entered again through guider later, then the blend fabric of molding is sent into rolling cooling and shaping device, and the section bar after cooling and shaping enters cutting machine and cuts according to required size.The present invention discloses the complete set of equipments being made up of identical tension creel, guider, preheating oven, shaping mould, rolling cooling apparatus for shaping and cutting machine.The present invention solves the difficulty of thermoplastic pultrusion dipping, improves the dipping effect of thermoplastic composite；Solve the problem making longitude and latitude mechanical property requirement the most relatively high product in thermoplastic pultrusion simultaneously.
Description
Technical field
The present invention relates to a kind of former and forming method thereof, especially relate to a kind of thermoplastic composite type
The pultrusion equipment of material and forming method thereof, it belongs to thermoplastic composite production and processing technical field.
Background technology
Pultrusion is conventional method of forming materials, and existing thermoplastic composite moulding process exists following lacking
Fall into: thermoplastic pultrusion impregnation difficulties, dipping effect difference and cannot to make longitude and latitude mechanical property requirement the highest.
Publication date is December in 2010 15, in the Chinese patent of Publication No. 101913255A, discloses a kind of title
Patent of invention for " pultrusion method of the thermoplastic composite of continuous fiber and equipment ".This patent will be multiple by thermoplasticity
The continuous fiber that condensation material is made is drawn from creel and is sent into moisture separator after collection yarn plate, then the continuous fiber through drying send
Entering in macerator and impregnate, the heating-up temperature controlling mould obtains required section bar at 150 DEG C-300 DEG C；Make molding
After section bar enter cooling bath cooling after enter under the traction of traction machine synchronize in automatic gas cutting machine by required size cutting,
Pack.Although the method is simple, equipment cost is low, but make longitude and latitude mechanical property require the most relatively high product and
Pultrusion industrial problems, it is impossible to enough continuous batch production, therefore still there is drawbacks described above in it.
Publication date is on 02 08th, 2006, in the Chinese patent of Publication No. 1730270, discloses a kind of entitled
The patent of invention of " pultrusion method of a kind of thermoplastic composite and shaping mould thereof ".This patent uses fine to matrix online
Dimension mixes according to certain weight ratio with reinforcing fiber, the most again through preforming mould and shaping mould, heats in shaping mould
Melted matrix fiber is sufficiently impregnated with reinforcing fiber, finally i.e. prepares into after the shaping mould cooled sizing of section bar out
Product.But the method reinforcing fiber direction is single, it is impossible to make through the highest product of broadwise requirement of strength, therefore it still exists
Drawbacks described above.
Publication date is on 08 31st, 1988, in the Chinese patent of Publication No. 88100835, discloses a kind of entitled
The patent of invention " manufacturing the method for thermoplastic polymeric's material, equipment and prepared product by pultrusion ".This patent is used
Pultrude process manufactures the method for continuous fiber reinforced thermoplastic polymer profiles.It is to impregnated of the rove of thermoplastic resin
Compress, to form grey cloth, fiber impregnates the thermoplastic resin of molten state, then by the heated flat mouth die head of rectangle,
So that compression rove, by force between melted resin infiltrated fiber, form grey cloth.But owing to thermoplastic resin viscosity is relatively big,
Operability difficulty in this method commercial production.
Summary of the invention
It is an object of the invention to overcome above-mentioned deficiency present in prior art, and provide a kind of and use with glass and change
Fine blend fabric is raw material, and the dipping effect of thermoplastic composite is good, can make through broadwise mechanical property in thermoplastic pultrusion simultaneously
Can require the most relatively high product, method is simple and convenient, and equipment is safe and reliable, it is possible to the thermoplastic composite of continuous batch production
The pultrusion equipment of section bar and forming method thereof.
The present invention solves the problems referred to above and be the technical scheme is that the pultrusion of this thermoplastics composite material section bar sets
It is standby, it is characterised in that: include identical tension creel, guider, preheating oven, shaping mould and the rolling cooling and shaping being sequentially connected
Device, shaping mould is arranged on the front of rolling cooling and shaping device；Equipment is safe and reliable, it is possible to serialization batch.
As preferably, guider of the present invention includes front guider and rear guider, and front guider is located at
The front end of preheating oven, the rear end of preheating oven is located at by rear guider.
As preferably, described shaping mould of the present invention is made up of preforming section and profiled section so that the product after molding
Quality is higher, meets and uses requirement.
As preferably, former of the present invention also includes cutting machine, and this cutting machine is arranged at rolling cooling and shaping dress
The rear put.
As preferably, cutting machine of the present invention uses and synchronizes automatic gas cutting machine；Make cutting efficiency higher.
The present invention also provides for the pultrusion method of a kind of thermoplastics composite material section bar, uses described in claim 1-5
The pultrusion equipment of thermoplastics composite material section bar, it is characterised in that: comprise the following steps:
1) glass and chemical fiber blended fabrics are placed on identical tension creel, according to product structure by multireel blend fabric from identical tension
Draw on creel, neatly stack through front guider, the weight summation of multilamellar blend fabric be controlled in 1000-5000 gram/flat
Side's rice；
2) baking oven preheating: the blend fabric feeding temperature that step one passes front guider is the preheating oven of 130-180 DEG C,
Blend fabric is finally made to go out temperature >=130 DEG C of baking oven.
3) blend fabric preheating completed passes rear guider, enters shaping mould and prepares section bar, and shaping mould is by preformation
Type section and profiled section composition, shaping mould preforming section temperature is controlled in 200 DEG C-250 DEG C, profiled section temperature be controlled in 210 DEG C-
260℃；
4) making the section bar after molding enter rolling cooling and shaping device, carry out cooling and shaping and prepare product, rolling is executed stressed
Pressure is 1-5MPa, and the chilling temperature of rolling cooling and shaping device is 40-130 DEG C, and during rolling, cylinder hauling speed is 0.2-5m/
min；Finally by synchronization cutting mechanism, product is cut according to required size.
As preferably, step 2 of the present invention) in, baking oven preheating temperature is 130 DEG C, 140 DEG C, 150 DEG C, 160 DEG C, 170
DEG C and 180 DEG C in one.
As preferably, in step 4) of the present invention, rolling execute stressed pressure be 1MPa, 1.5MPa, 2MPa,
One in 2.5MPa, 3MPa, 3.5MPa, 4MPa, 4.5MPa and 5MPa.
As preferably, in step 4) of the present invention, the chilling temperature of rolling cooling and shaping device is 40 DEG C, 50 DEG C, 60
DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 100 DEG C, 110 DEG C, one in 120 DEG C and 130 DEG C.
As preferably, in step 4) of the present invention, cylinder hauling speed is 0.2m/min, 0.3m/min, 0.4m/min,
0.5m/min, 0.6m/min, 0.7m/min, 0.8m/min, 0.9m/min, 1m/min, 2m/min, 3m/min, 4m/min and 5m/
One in min.
The present invention compared with prior art, has the following advantages and effect: 1, mixed fiber fabric is the most just base
Body fiber mixes with reinforcing fiber, just solves flooding problems before pultrusion, is better than powder infusion method, solution dipping method and melts
Melt infusion process, good product performance；2, section bar shows and equalizes mechanical property through broadwise, solves in thermoplastic pultrusion and makes through broadwise
The problem of mechanical property requirements the most relatively high product；3, the inventive method is simple and convenient, and equipment is safe and reliable, fundamentally solves
Thermoplastic composite pultrusion industrial problems, it is possible to continuous batch production.
Accompanying drawing explanation
Fig. 1 is the process device structure schematic diagram of the embodiment of the present invention.
Fig. 2 is the product structure schematic diagram of the step 3 of embodiment of the present invention forming method.
Fig. 3 is the shaping mould entrance shape structural representation of the step 3 of embodiment of the present invention forming method.
Fig. 4 is the shaping mould outlet shapes structural representation of the step 3 of embodiment of the present invention forming method.
In figure: guider D, identical tension creel 1, front guider 2, preheating oven 3, rear guider 4, shaping mould 5,
Rolling cooling and shaping device 6, cutting machine 7.
Detailed description of the invention
The present invention is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following example are to this
Bright explanation and the invention is not limited in following example.
See Fig. 1-Fig. 4, the pultrusion equipment of the present embodiment thermoplastics composite material section bar, it is characterised in that: include
Identical tension creel 1, guider, preheating oven 3, shaping mould 5, rolling cooling and shaping device 6 and the cutting machine 7 being sequentially connected,
Shaping mould 5 is arranged on the front of rolling cooling and shaping device 6.
The present embodiment guider includes that preheating oven 3 is located at by front guider 2 and rear guider 4, front guider 2
Front end, the rear end of preheating oven 3 is located at by rear guider 4；Shaping mould 5 is made up of preforming section and profiled section.
Cutting machine 7 in the present embodiment is arranged at the rear of rolling cooling and shaping device 6, and cutting machine 7 uses and synchronizes automatically
Cutting machine 7.
The pultrusion method of a kind of thermoplastics composite material section bar of the present embodiment, comprises the following steps:
1) glass and chemical fiber blended fabrics are placed on identical tension creel 1, according to product structure, multireel blend fabric are opened from perseverance
Drawing on power creel 1, neatly stack through front guider 2, the weight summation of multilamellar blend fabric is controlled in 1000-5000
Gram/m, depending on concrete weight summation is according to made profile structure；According to blend fabric specification list in existing market one by one
Volume blend fabric grammes per square metre scope is 500-1500 gram/m；According to required blend fabric weight summation, select blend fabric type
During number with volume number, ensure volume number is minimum, model is single as far as possible.The most required blend fabric weight summation is 4500 grams/m,
Then selecting single volume blend fabric weight is 1500 grams/m, selects volume three.
In the present embodiment, required blend fabric weight summation is 1000 grams/m, 1500 grams/m, 2000 grams/
Square metre, 2500 grams/m, 3000 grams/m, 3600 grams/m, 4200 grams/m, 4500 grams/m,
One in 5000 grams/m.
2) baking oven preheating: the blend fabric feeding temperature that step one passes front guider 2 is the preheating of 130-180 DEG C
Baking oven 3, finally makes blend fabric go out temperature >=130 DEG C of baking oven.
In the present embodiment, baking oven preheating temperature is in 130 DEG C, 140 DEG C, 150 DEG C, 160 DEG C, 170 DEG C and 180 DEG C
Kind.
3) blend fabric preheating completed passes rear guider 4, enters shaping mould 5 and prepares section bar, and shaping mould 5 is by advance
Profiled section and profiled section composition, shaping mould 5 preforming section temperature is controlled in 200 DEG C-250 DEG C, and profiled section temperature is controlled in 210
℃-260℃；Depending on actual temp value is according to thermoplastic characteristic；Preforming section die is gradually crossfaded into required product by flat mouth
Product cross sectional shape, depending on profiled section mould structure is by product cross section shape, from preforming section entrance to profiled section outlet gap by
The least, cross section reduces therewith, and shaping mould 5 entrance is fillet, as shown in Figure 2 product structure, as Figure 3-Figure 4, mould
90 degree of rectangular shaped will be gradually become by flat mouth；Reinforcing fiber can fully be soaked by the chemical fibre melted through the pressure of shaping mould 5
Stain, obtains closely knit section bar.
In the present embodiment, preforming section temperature is 200 DEG C, 210 DEG C, 220 DEG C, 230 DEG C, 240 DEG C, one in 250 DEG C.
In the present embodiment, profiled section temperature is 210 DEG C, 220 DEG C, 220 DEG C, 230 DEG C, 240 DEG C, 250 DEG C, in 260 DEG C
A kind of.
4) making the section bar after molding enter rolling cooling and shaping device 6, carry out cooling and shaping and prepare product, rolling applies pressure
The pressure of power is 1-5MPa, and the chilling temperature of rolling cooling and shaping device 6 is 40-130 DEG C, and during rolling, cylinder hauling speed is
0.2-5m/min；Finally by synchronization cutting mechanism 7, product is cut according to required size.
In the present embodiment, rolling execute stressed pressure be 1MPa, 1.5MPa, 2MPa, 2.5MPa, 3MPa, 3.5MPa,
One in 4MPa, 4.5MPa and 5MPa.
In the present embodiment, the chilling temperature of rolling cooling and shaping device 6 is 40 DEG C, 50 DEG C, 60 DEG C, 70 DEG C, 80 DEG C, 90
DEG C, 100 DEG C, 110 DEG C, one in 120 DEG C and 130 DEG C.
The present embodiment, cylinder hauling speed is 0.2m/min, 0.3m/min, 0.4m/min, 0.5m/min, 0.6m/min,
One in 0.7m/min, 0.8m/min, 0.9m/min, 1m/min, 2m/min, 3m/min, 4m/min and 5m/min.
Depending in the present embodiment, the concrete weight summation in step 1) is according to made profile structure, concrete in step 3)
Depending on temperature value is according to thermoplastic characteristic.
By above-mentioned elaboration, those skilled in the art can implement.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, its be named title etc. can be different,
Above content described in this specification is only to present configuration example explanation.All according to patent structure of the present invention
The equivalence that structure, feature and principle described in think of is done changes or simple change, is all included in the protection model of patent of the present invention
In enclosing.Described specific embodiment can be made various amendment or benefit by those skilled in the art
Fill or use similar mode to substitute, without departing from the structure of the present invention or surmount model defined in the claims
Enclose, protection scope of the present invention all should be belonged to.
Claims (10)
1. the pultrusion equipment of a thermoplastics composite material section bar, it is characterised in that: include the identical tension yarn being sequentially connected
Frame, guider, preheating oven, shaping mould and rolling cooling and shaping device, shaping mould is arranged on rolling cooling and shaping device
Front.
The pultrusion equipment of thermoplastics composite material section bar the most according to claim 1, it is characterised in that: described guiding
Device includes front guider and rear guider, and the front end of preheating oven is located at by front guider, and rear guider is located at pre-
The rear end of oven heat.
The pultrusion equipment of thermoplastics composite material section bar the most according to claim 1, it is characterised in that: described molding
Mould is made up of preforming section and profiled section.
The pultrusion equipment of thermoplastics composite material section bar the most according to claim 1, it is characterised in that: described molding
Equipment also includes cutting machine, and this cutting machine is arranged at the rear of rolling cooling and shaping device.
The pultrusion equipment of thermoplastics composite material section bar the most according to claim 4, it is characterised in that: described cutting
Machine uses and synchronizes automatic gas cutting machine.
6. a pultrusion method for thermoplastics composite material section bar, uses the thermoplastic composite material described in claim 1-5
The pultrusion equipment of material section bar, it is characterised in that: comprise the following steps:
1) glass and chemical fiber blended fabrics are placed on identical tension creel, according to product structure by multireel blend fabric from identical tension
Draw on creel, neatly stack through front guider, the weight summation of multilamellar blend fabric be controlled in 1000-5000 gram/flat
Side's rice；
2) baking oven preheating: the blend fabric feeding temperature that step one passes front guider is the preheating oven of 130-180 DEG C,
Blend fabric is finally made to go out temperature >=130 DEG C of baking oven.
3) blend fabric preheating completed passes rear guider, enters shaping mould and prepares section bar, and shaping mould is by preforming section
Forming with profiled section, shaping mould preforming section temperature is controlled in 200 DEG C-250 DEG C, and profiled section temperature is controlled in 210 DEG C-260 DEG C；
4) making the section bar after molding enter rolling cooling and shaping device, carry out cooling and shaping and prepare product, rolling is executed stressed
Pressure is 1-5MPa, and the chilling temperature of rolling cooling and shaping device is 40-130 DEG C, and during rolling, cylinder hauling speed is 0.2-5m/
min；Finally by synchronization cutting mechanism, product is cut according to required size.
The pultrusion method of thermoplastics composite material section bar the most according to claim 6, it is characterised in that: described step
2), in, baking oven preheating temperature is the one in 130 DEG C, 140 DEG C, 150 DEG C, 160 DEG C, 170 DEG C and 180 DEG C.
The pultrusion method of thermoplastics composite material section bar the most according to claim 6, it is characterised in that: described step
4) in, rolling execute stressed pressure be 1MPa, 1.5MPa, 2MPa, 2.5MPa, 3MPa, 3.5MPa, 4MPa, 4.5MPa and
One in 5MPa.
The pultrusion method of thermoplastics composite material section bar the most according to claim 6, it is characterised in that: described step
4), in, the chilling temperature of rolling cooling and shaping device is 40 DEG C, 50 DEG C, 60 DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 100 DEG C, 110 DEG C,
One in 120 DEG C and 130 DEG C.
The pultrusion method of thermoplastics composite material section bar the most according to claim 6, it is characterised in that: described step
Rapid 4), in, cylinder hauling speed is 0.2m/min, 0.3m/min, 0.4m/min, 0.5m/min, 0.6m/min, 0.7m/min,
One in 0.8m/min, 0.9m/min, 1m/min, 2m/min, 3m/min, 4m/min and 5m/min.
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| CN201610634186.5A CN106239939A (en) | 2016-08-05 | 2016-08-05 | The pultrusion equipment of a kind of thermoplastics composite material section bar and forming method thereof |
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| CN201610634186.5A CN106239939A (en) | 2016-08-05 | 2016-08-05 | The pultrusion equipment of a kind of thermoplastics composite material section bar and forming method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106626447A (en) * | 2017-03-17 | 2017-05-10 | 远东电缆有限公司 | Pultrusion device and pultrusion process for thermoplastic substrate layer production |
| CN108790220A (en) * | 2017-04-26 | 2018-11-13 | 波音公司 | Apply longitudinal curvature to the pultrusion system of composite material component |
| CN112497788A (en) * | 2020-11-11 | 2021-03-16 | 振石集团华智研究院(浙江)有限公司 | Carbon glass composite FRP optical cable reinforced core and production method thereof |
| CN115122677A (en) * | 2022-06-30 | 2022-09-30 | 重庆泛锐科技有限公司 | Pultrusion equipment for thermoplastic composite material section bar |
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| CN104552988A (en) * | 2014-12-30 | 2015-04-29 | 天津高盛钢丝绳有限公司 | Preparation method and preparation system for ultralight composite traction belt |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106626447A (en) * | 2017-03-17 | 2017-05-10 | 远东电缆有限公司 | Pultrusion device and pultrusion process for thermoplastic substrate layer production |
| CN108790220A (en) * | 2017-04-26 | 2018-11-13 | 波音公司 | Apply longitudinal curvature to the pultrusion system of composite material component |
| CN108790220B (en) * | 2017-04-26 | 2022-04-19 | 波音公司 | Pultrusion system for imparting longitudinal curvature to composite material parts |
| CN112497788A (en) * | 2020-11-11 | 2021-03-16 | 振石集团华智研究院(浙江)有限公司 | Carbon glass composite FRP optical cable reinforced core and production method thereof |
| CN112497788B (en) * | 2020-11-11 | 2022-11-22 | 振石集团华智研究院(浙江)有限公司 | Carbon glass composite FRP optical cable reinforced core and production method thereof |
| CN115122677A (en) * | 2022-06-30 | 2022-09-30 | 重庆泛锐科技有限公司 | Pultrusion equipment for thermoplastic composite material section bar |
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