CN108312576A - Multiple tracks wave forming device and carbon fibre material forming method - Google Patents
Multiple tracks wave forming device and carbon fibre material forming method Download PDFInfo
- Publication number
- CN108312576A CN108312576A CN201711376521.7A CN201711376521A CN108312576A CN 108312576 A CN108312576 A CN 108312576A CN 201711376521 A CN201711376521 A CN 201711376521A CN 108312576 A CN108312576 A CN 108312576A
- Authority
- CN
- China
- Prior art keywords
- wave roller
- wave
- roller
- multiple tracks
- tooth post
- 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
- 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]
- B29C70/504—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] using rollers or pressure bands
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Reinforced Plastic Materials (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a kind of multiple tracks wave forming devices, the wave roller being correspondingly arranged including two groups, respectively upper wave roller and lower wave roller, wherein, the upper wave roller is column construction with the lower wave roller, the tooth post of protrusion is evenly provided on the peripheral side of the upper wave roller and the lower wave roller respectively, is recessed portion between adjacent tooth post, the shape of the tooth post is identical as the shape of the recessed portion；The tooth post of the upper wave roller and the tooth post of the recessed portion of the lower wave roller, the recessed portion of the upper wave roller and the lower wave roller are arranged in a one-to-one correspondence respectively.By carbon fiber prepreg after the extruding of wave roller, so that forming close waveform in the material for sprawling shape originally, internal carbon fibers silk is limited in inside the resin of undulate, it can not be subjected to displacement, so that when again passing by extrusion forming, internal carbon fibers silk can be uniformly distributed, and be concentrated according to certain guiding, keep product fiber regular, uniform intensity distribution.
Description
Technical field
The present invention relates to technical field of textile machine, and in particular to carbon fibre material molding machine and forming method.
Background technology
By materials such as carbon fiber yarn, epoxy resin, release papers, by film, hot pressing, cooling, overlay film, the techniques such as batches and add
Composite material made of work is known as carbon fiber prepreg, when carrying out carbon fibre material processing, is especially by extrusion forming
When specific shape, material internal carbon fiber wire direction is chaotic under extruding force, and random arrangement causes product strength uneven, produces
Product shape cannot reach design requirement etc. and cause the qualification rate of product low, low production efficiency.
In view of defect existing for above-mentioned existing carbon fibre material molding machine, the present inventor is based on being engaged in such product
Manufacture and design abundant for many years practical experience and professional knowledge, and coordinate the utilization of scientific principle, is actively subject to research and innovation, to create
If a kind of multiple tracks wave forming device and carbon fibre material forming method, it is made to have more practicability.By constantly studying, setting
Meter, and after studying sample repeatedly and improving, the present invention having practical value is created finally.
Invention content
It is a primary object of the present invention to, overcome defect existing for existing carbon fibre material molding machine, and provide one
Kind multiple tracks wave forming device and carbon fibre material forming method so that carbon fibre material internal fiber arranged regular, intensity point
Cloth is uniform, thus more suitable for practicality, and with the utility value in industry.
The object of the invention to solve the technical problems is realized using following technical scheme.
Multiple tracks wave forming device, including two groups of wave rollers being correspondingly arranged, respectively upper wave roller and lower wave roller,
In,
The upper wave roller and the lower wave roller are column construction, on the peripheral side of the upper wave roller and the lower wave roller
It is evenly provided with the tooth post of protrusion respectively, is recessed portion, the shape of the tooth post and the recessed portion between adjacent tooth post
Shape it is identical；
The tooth post of the upper wave roller and the recessed portion of the lower wave roller, the recessed portion of the upper wave roller and the lower wave
The tooth post of roller is arranged in a one-to-one correspondence respectively；
Further include driving device, for providing the opposite or mobile power that is close to the upper wave roller and/or lower wave roller.
As a kind of perferred technical scheme, the tooth post is arc-shaped.
As a kind of perferred technical scheme, the wave roller includes central shaft and the set that is set on the central shaft
Cylinder, wherein the tooth post and the recessed portion are separately positioned on the peripheral side of the sleeve.
As a kind of perferred technical scheme, the central shaft is hollow shaft.
As a kind of perferred technical scheme, it is provided in the hollow shaft of the upper wave roller and the lower wave roller
Preheating device, for providing heat to the upper wave roller and the lower wave roller.
As a kind of perferred technical scheme, the hollow shaft is made of stainless steel, and the sleeve is gathered by super high molecular weight
Ethylene is made, and wherein ultra-high molecular weight polyethylene is unbranched linear polyethylene of the molecular weight 1,500,000 or more.
As a kind of perferred technical scheme, the preheating device is infrared heater.Preheating device edge respectively
The length direction of the upper wave roller and the lower wave roller is arranged, and is arranged in the upper wave roller and the lower wave roller
Center, so that casing side heat is more uniform.
As a kind of perferred technical scheme, the driving device is cylinder, and between the cylinder and the wave roller
It is fixed by the bracket connection, wherein the holder is connect with the both ends of the wave roller, and the wave roller can be around described
Center axis rotation.
A kind of carbon fibre material forming method, includes the following steps:
Step 1 squeezes carbon fiber prepreg using multiple tracks wave forming device as described above so that the flat carbon fiber
Prepreg is tieed up to arrange according to certain guiding in internal carbon fibers silk；
Step 2 will form required carbon fiber after step 1 handles obtained carbon fibre material by the extruding of extrusion molding dies
Tie up material.
Using above-mentioned technical proposal, following technique effect can be realized：
By carbon fiber prepreg after the extruding of wave roller so that close waveform is formed in the material for sprawling shape originally,
Internal carbon fibers silk is limited in inside the resin of undulate, can not be subjected to displacement, so that when again passing by extrusion forming,
Internal carbon fibers silk can be uniformly distributed, and be concentrated according to certain guiding, keep product fiber regular, intensity distribution is equal
It is even.
Description of the drawings
Fig. 1 is multiple tracks wave forming device of the present invention（Non- squeezed state）Structural schematic diagram；
Fig. 2 is multiple tracks wave forming device of the present invention（Squeezed state）Structural schematic diagram；
Fig. 3 is multiple tracks wave forming device side view of the present invention；
Fig. 4 is existing carbon fiber prepreg forming process internal structure schematic diagram；
Fig. 5 is by multiple tracks wave forming device treated carbon fiber prepreg forming process internal structure schematic diagram；
Wherein：
The upper wave rollers of 1-, wave roller under 2-, 3- tooth posts, 4- recessed portions, 5- central shafts, 6- sleeves, 7- preheating devices, 8- cylinders,
9- carbon fiber prepregs, 10- bearings, 11- holders.
Specific implementation mode
Further to illustrate the present invention to reach the technological means and effect that predetermined goal of the invention is taken, to foundation
Multiple tracks wave forming device and carbon fibre material forming method proposed by the present invention its specific implementation mode, feature and its effect,
It is described in detail as after.
As shown in Figs. 1-3, the invention discloses a kind of multiple tracks wave forming devices, including two groups of waves being correspondingly arranged
Roller, respectively upper wave roller 1 and lower wave roller 2, wherein
Upper wave roller 1 and lower wave roller 2 are column construction, are uniformly set respectively on the peripheral side of upper wave roller 1 and lower wave roller 2
It is equipped with the tooth post 3 of protrusion, is recessed portion 4 between adjacent tooth post 3, the shape of tooth post 3 is identical as the shape of recessed portion 4, to
So that the tooth post 3 of the wave roller of upper and lower corresponding setting is inserted into corresponding recessed portion 4, to be clipped in wave roller 1 under
Carbon fiber prepreg 9 between wave roller 2 squeezes waviness；
The tooth post 3 of the tooth post 3 of upper wave roller 1 and the recessed portion 4 of lower wave roller 2, the recessed portion 4 and lower wave roller 2 of upper wave roller 1
It is arranged in a one-to-one correspondence respectively；
Further include driving device, for providing the opposite or mobile power that is close, tool to upper wave roller 1 and/or lower wave roller 2
Body, it can only fix wave roller 1 or only fixed lower 2 or upper wave roller 1 of wave roller as shown in Figure 1, lower wave roller 2 be not solid
It is fixed, it can realize that wave roller 1 and lower wave roller 2 move towards or are close movement.
As a kind of perferred technical scheme, tooth post 3 is arc-shaped, and arc, which is arranged, makes 9 surface of carbon fiber prepreg
Stress is opposite to be reduced, and crack conditions are not susceptible to.
As a kind of perferred technical scheme, wave roller includes central shaft 5 and the sleeve 6 that is set on central shaft 5,
In, tooth post 3 and recessed portion 4 are separately positioned on the peripheral side of sleeve 6, and the wave roller of combined type setting is conveniently replaceable easy to wear
Sleeve 6.In addition, being additionally provided with bearing 10 on central shaft 5.
As a kind of perferred technical scheme, central shaft 5 is hollow shaft.
As a kind of perferred technical scheme, it is provided with preheating device 7 in the hollow shaft of upper wave roller 1 and lower wave roller 2,
For giving upper wave roller 1 and lower wave roller 2 to provide heat.The setting of preheating device 7 is more easy to convenient for softening carbon fiber prepreg 9
In squeezing waviness, easy to process, the surface of the carbon fiber prepreg 9 after in addition heating, which is squeezed, to be not easy to form stress concentration
It is broken afterwards.
As a kind of perferred technical scheme, hollow shaft is made of stainless steel, sleeve by ultrahigh molecular weight polyethylene at,
Hollow shaft made of stainless steel has enough intensity, and corrosion-resistant, and ultra-high molecular weight polyethylene is a kind of linear structure
Thermoplastic engineering plastic with Good All-around Property has superpower wearability, self lubricity, and intensity is relatively high, chemically
Matter is stable, anti-aging property is strong.
As a kind of perferred technical scheme, preheating device 7 is infrared heater.Preheating device 7 is respectively along upper wave
The length direction of roller 1 and lower wave roller 2 is arranged, and is arranged in the center of upper wave roller 1 and lower wave roller 2, so that
6 side heat of casing is more uniform.So that the side of the wave roller of rotatable movement is heated evenly, it is pre- to fiber without influencing
The heating of leaching material 9.
As a kind of perferred technical scheme, driving device is cylinder 8, and passes through holder 11 between cylinder 8 and wave roller
It is fixedly connected, wherein holder 11 is fixedly connected with the both ends of wave roller, specifically, the both ends of holder 11 are separately connected wave
The middle part at roller both ends, holder 11 is fixedly connected with cylinder 8, and the wave being fixedly connected with holder 11 is realized by the promotion of cylinder 8
The movement of unrestrained roller, in addition holder is rotatably connected with the both ends of wave roller, therefore wave roller can be rotated around central shaft 5, work as fibre
When tieing up prepreg 9 between upper wave roller 1 and lower wave roller 2, after fiber prepreg material 9 travels forward, it is pre- that fiber is clamped in drive
The upper wave roller 1 and lower wave roller 2 of leaching material 9 are rotated along 9 direction of advance of fiber prepreg material, can not only reduce wave roller and fiber
Frictional force between prepreg 9, does not easily cause the fracture of fiber prepreg material 9, and surface, the resin that has certain viscosity will not
It is deposited in due to frictional force on wave roller.
The invention also discloses a kind of carbon fibre material forming methods, include the following steps:
Step 1 squeezes carbon fiber prepreg 9 using multiple tracks wave forming device as above so that flat carbon fibre initial rinse
Material 9 is arranged in internal carbon fibers silk according to certain guiding；
Step 2 will form required carbon fiber after step 1 handles obtained carbon fibre material by the extruding of extrusion molding dies
Material is tieed up,
As shown in figure 4, existing carbon fiber prepreg 9 is when being squeezed into the material of triangle section type, due to being squeezed mold
Extruding inside filament be in random arrangement, carbon fiber wire, which is squeezed to material internal, to be gathered, and outside is mostly resinae
Material, therefore surface strength is low, easy fracture or deformation, yield rate is low, and as shown in figure 5, by multiple tracks wave pre-shaping device
Wavy carbon fiber prepreg 9 is squeezed into during the extrusion operation of later stage extrusion die, since carbon fiber wire has been formed
The arrangement shape of rule, therefore the distribution uniform of the inside and outside carbon fiber wire of the material of finally formed triangle section type, therefore
Its uniform intensity distribution has preferable performance.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, as long as being the content without departing from technical solution of the present invention, according to the technical essence of the invention
To any simple modification, equivalent change and modification made by above example, in the range of still falling within technical solution of the present invention.
Claims (9)
1. multiple tracks wave forming device, which is characterized in that the wave roller being correspondingly arranged including two groups, respectively upper wave roller（1）
With lower wave roller（2）, wherein
The upper wave roller（1）With the lower wave roller（2）For column construction, the upper wave roller（1）With the lower wave roller
（2）Peripheral side on be evenly provided with respectively protrusion tooth post（3）, adjacent tooth post（3）Between be recessed portion（4）, described
Tooth post（3）Shape and the recessed portion（4）Shape it is identical；
The upper wave roller（1）Tooth post（3）With the lower wave roller（2）Recessed portion（4）, the upper wave roller（1）It is recessed
Concave portion（4）With the lower wave roller（2）Tooth post（3）It is arranged in a one-to-one correspondence respectively；
Further include driving device, for the upper wave roller（1）And/or lower wave roller（2）The opposite or movement that is close is provided
Power.
2. multiple tracks wave forming device according to claim 1, which is characterized in that the tooth post（3）It is arc-shaped.
3. multiple tracks wave forming device according to claim 1, which is characterized in that the wave roller includes central shaft（5）
Be set in the central shaft（5）On sleeve（6）, wherein the tooth post（3）With the recessed portion（4）It is separately positioned on institute
State sleeve（6）Peripheral side on.
4. multiple tracks wave forming device according to claim 3, which is characterized in that the central shaft（5）For hollow shaft.
5. multiple tracks wave forming device according to claim 4, which is characterized in that the upper wave roller（1）Under described
Wave roller（2）The hollow shaft in be provided with preheating device（7）, for the upper wave roller（1）With the lower wave roller
（2）Heat is provided.
6. multiple tracks wave forming device according to claim 5, which is characterized in that the hollow shaft is made of stainless steel,
The sleeve（6）By ultrahigh molecular weight polyethylene at.
7. multiple tracks wave forming device according to claim 5, which is characterized in that the preheating device（7）For infrared ray
Heater.
8. multiple tracks wave forming device according to claim 1, which is characterized in that the driving device is cylinder（8）, and
The cylinder（8）Pass through holder between the wave roller（11）It is fixedly connected.
9. a kind of carbon fibre material forming method, which is characterized in that include the following steps:
Step 1 squeezes carbon fiber prepreg using multiple tracks wave forming device as described in claim 1（9）So that tabular
The carbon fiber prepreg（9）It arranges according to certain guiding in internal carbon fibers silk；
Step 2 will form required carbon fiber after step 1 handles obtained carbon fibre material by the extruding of extrusion molding dies
Tie up material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711376521.7A CN108312576A (en) | 2017-12-19 | 2017-12-19 | Multiple tracks wave forming device and carbon fibre material forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711376521.7A CN108312576A (en) | 2017-12-19 | 2017-12-19 | Multiple tracks wave forming device and carbon fibre material forming method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108312576A true CN108312576A (en) | 2018-07-24 |
Family
ID=62892079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711376521.7A Pending CN108312576A (en) | 2017-12-19 | 2017-12-19 | Multiple tracks wave forming device and carbon fibre material forming method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108312576A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115787310A (en) * | 2022-12-09 | 2023-03-14 | 毕彦鹏 | Hydrophobic non-woven fabric and preparation method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0768638A (en) * | 1993-08-31 | 1995-03-14 | Showa Aircraft Ind Co Ltd | Corrugation molding machine |
| JPH08323900A (en) * | 1995-05-30 | 1996-12-10 | Showa Aircraft Ind Co Ltd | Manufacture of honeycomb core made of fiber-reinforced plastic |
| US20050023728A1 (en) * | 2003-08-01 | 2005-02-03 | Benson Vernon M. | Apparatus and methods for forming composite stiffeners and reinforcing structures |
| JP2006175757A (en) * | 2004-12-24 | 2006-07-06 | Sumitomo Bakelite Co Ltd | Embossed prepreg, its production method, and panel |
| US20120040134A1 (en) * | 2005-01-07 | 2012-02-16 | Ole-Bendt Rasmussen | Laminate of thermoplastic film materials exhibiting throughgoing porosity |
| CN105624874A (en) * | 2016-03-23 | 2016-06-01 | 江苏澳盛复合材料科技有限公司 | Carbon fiber widening equipment and process |
| US20160319088A1 (en) * | 2014-03-20 | 2016-11-03 | Teijin Limited | Fiber-Reinforced Plastic Shaped Product |
| CN106142703A (en) * | 2016-07-11 | 2016-11-23 | 深圳市飞博超强新材料有限公司 | A kind of composite plate with ripple sandwich structure and preparation method thereof |
| CN207617147U (en) * | 2017-12-19 | 2018-07-17 | 常州新创航空科技有限公司 | Multiple tracks wave forming device |
-
2017
- 2017-12-19 CN CN201711376521.7A patent/CN108312576A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0768638A (en) * | 1993-08-31 | 1995-03-14 | Showa Aircraft Ind Co Ltd | Corrugation molding machine |
| JPH08323900A (en) * | 1995-05-30 | 1996-12-10 | Showa Aircraft Ind Co Ltd | Manufacture of honeycomb core made of fiber-reinforced plastic |
| US20050023728A1 (en) * | 2003-08-01 | 2005-02-03 | Benson Vernon M. | Apparatus and methods for forming composite stiffeners and reinforcing structures |
| JP2006175757A (en) * | 2004-12-24 | 2006-07-06 | Sumitomo Bakelite Co Ltd | Embossed prepreg, its production method, and panel |
| US20120040134A1 (en) * | 2005-01-07 | 2012-02-16 | Ole-Bendt Rasmussen | Laminate of thermoplastic film materials exhibiting throughgoing porosity |
| US20160319088A1 (en) * | 2014-03-20 | 2016-11-03 | Teijin Limited | Fiber-Reinforced Plastic Shaped Product |
| CN105624874A (en) * | 2016-03-23 | 2016-06-01 | 江苏澳盛复合材料科技有限公司 | Carbon fiber widening equipment and process |
| CN106142703A (en) * | 2016-07-11 | 2016-11-23 | 深圳市飞博超强新材料有限公司 | A kind of composite plate with ripple sandwich structure and preparation method thereof |
| CN207617147U (en) * | 2017-12-19 | 2018-07-17 | 常州新创航空科技有限公司 | Multiple tracks wave forming device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115787310A (en) * | 2022-12-09 | 2023-03-14 | 毕彦鹏 | Hydrophobic non-woven fabric and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109176962A (en) | A kind of pre-dispersed and surface treatment continuous fiber reinforced thermoplastic resin base impregnates the moulding integrated device of band and its forming method | |
| CN111775366B (en) | Preparation method and equipment of unidirectional continuous fiber reinforced thermoplastic composite material | |
| CN106903906B (en) | A kind of continuous fiber reinforced thermoplastic resin melt impregnation device and preparation method | |
| CN207617147U (en) | Multiple tracks wave forming device | |
| TWI698562B (en) | Manufacturing device and manufacturing method of chopped fiber bundle | |
| JP6462115B2 (en) | Apparatus and method for unidirectionally arranging nanofibers in a porous medium | |
| CN88102218A (en) | The method and apparatus of the thermoplastic resin section bar that production strengthens with continuous fiber | |
| EP0569460A1 (en) | A method for continuously forming a fiber reinforced resin composite. | |
| CN107097436A (en) | The production method and process units of a kind of fibre reinforced thermoplastic composite | |
| CN203559250U (en) | Carbon fiber sizing device for thermoplastic resin | |
| CN108312576A (en) | Multiple tracks wave forming device and carbon fibre material forming method | |
| CN102990923B (en) | A kind of preparation method of continuous fiber reinforced thermoplastic compound prepreg tape tubing | |
| CN104827686B (en) | A kind of string immersion system and method | |
| CN203004331U (en) | Device for producing continuous fiber reinforcement thermoplastic composite | |
| CN106381592A (en) | Carbon nanometer tube flat filament, preparation method and preparation device thereof | |
| US3053717A (en) | Reinforced continuous sheeting and the method and apparatus for making same | |
| CN104328610B (en) | The surface modification treatment device of polyparaphenylene's benzo dioxazole fiber and using method | |
| CN113122942B (en) | Large-scale preparation method of low-shrinkage polytetrafluoroethylene filaments | |
| CN105538538B (en) | A kind of long-fiber bundle melt impregnation system | |
| CN204727327U (en) | A kind of fiber feeding shutoff device | |
| CN109930275A (en) | The expansion slivers processing method of carbon fiber wire | |
| CN207088268U (en) | A kind of immersion system of Long-fiber-reinforced thermoplastics | |
| CN207044682U (en) | Thermoplastic composite corrugated plating production system | |
| CN111826771A (en) | Regenerated ES fiber tension heat setting machine and heat setting method | |
| CN105887221A (en) | Multi-roller drafting device for manufacturing PTFE sewing thread |
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 |