CN104369285A - Melt impregnation equipment and method for continuous fiber enhanced thermoplastic resin - Google Patents
Melt impregnation equipment and method for continuous fiber enhanced thermoplastic resin Download PDFInfo
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- CN104369285A CN104369285A CN201410692330.1A CN201410692330A CN104369285A CN 104369285 A CN104369285 A CN 104369285A CN 201410692330 A CN201410692330 A CN 201410692330A CN 104369285 A CN104369285 A CN 104369285A
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- die head
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Abstract
The invention discloses melt impregnation equipment and a method for continuous fiber enhanced thermoplastic resin. The melt impregnation equipment for continuous fiber enhanced thermoplastic resin comprises a head and a distributor, wherein the head comprises a fixed die head and two movable die heads; a cavity for arranging and communicating the two movable die heads is formed in the fixed die head; the middle part of the cavity is 'X'-shaped; the outer end of each movable die head is square, the middle end of each movable die head is triangular, and the top end of each movable die head is arc-shaped; the middle upper part of the first movable die head of the two movable die heads and the fixed die head are provided with first impregnation runners; no clearance is formed between the middle lower part of the first movable die head and the fixed die head; no clearance is formed between the middle upper part of the second movable die head and the fixed die head, and the middle lower part of the second movable die head and the fixed die head are provided with second impregnation runners. According to the melt impregnation equipment, the technical problems of resolution to completely impregnate continuous fibers, balance of pressure and flow of a melt, uniform dispersion of the continuous fibers in the impregnation runners, control of the tension and secondary injury reduction of the fibers can be solved.
Description
Technical field
The present invention relates to a kind of thermoplastic resin molded technical field, particularly a kind of melt impregnation method and apparatus of continuous fiber reinforced thermoplastic resin.
Background technology
Continuous fiber reinforced thermoplastic resin is a kind of is matrix with thermoplastic resin, and fortifying fibre unidirectional array and continuous print, for the preparation of the intermediate of composite, have a wide range of applications in fields such as traffic, automobile, oil, natural gas or buildings.Especially in automotive field, continuous fiber reinforced thermoplastic resin can be passed through the mouth mode pulling of given shape, pelletizing obtains long fiber reinforcement pellet, long fiber reinforcement product is formed again through secondary injection molding, the various hardwares of extensive replacement automotive interior, as front-end module, seat support, instrument board framework and door-plate module etc., reach to mould Dai Gang, reduce discharging the object of environmental protection.But in actual production process, usually affect the dipping effect of continuous tow due to the unreasonable of melt impregnation device structure, the even frequent disconnected bar etc. that occurs produces abnormal phenomenon, greatly reduces the seed output and quality of product.
As: publication number is disclose a kind of long fiber reinforced plastics production fibre bundle fuse dipping die head in the patent application of CN101695873A, this equipment adopts has medium-altitude contact godet and noncontact godet pair, the radial expansion of reinforcing fiber tow and plastic melt are toward the Radial Flow of fibre bundle, and the friction reducing fibre single thread is lost.In the die cavity being full of melt, fibre bundle alternately walks around the circle drum body of contact godet under tension force traction, gap between noncontact godet pair is passed, and circle drum body impels and slips over the fibre bundle of its curved surface to both sides Quick Extended by traction, increases the contact surface of fibre bundle and plastic melt; Noncontact godet evokes melt eddy flow, presses to through godet to the fibre bundle between slit, promotes that plastic melt is toward fibre bundle Radial Flow, improves dipping effect.But in actual applications, the maximum problem of this equipment is that can not control resin melt enters die cavity equably, whole cavity pressure cannot be made to keep stable, and the increased risk that local pressure is too high, is therefore also difficult to reach desirable dipping effect.
Publication number is the former disclosing a kind of fiber reinforced thermoplastic resin in the patent application of CN102107536A, this equipment adopts the mode of fiber duct to pass into pending fiber, make often to restraint long fibre and along independently direction advance, the interference between fibre bundle can both be avoided; Adopt fluffy and pre-heating system in advance, and add the jockey pulley of special shape, ensure long stapled dipping effect, introduce resin melt runner in the downside of fibre bundle, and adopt resin melt feeding manner from the bottom up.But in the device, melt is emerged from long-fiber bundle is one-sided, melt is difficult to comprehensive coated wetting fibre bundle, and the Distribution system of flow channel that melt is ununified, be difficult to ensure that the melt pressure in whole die cavity is comparatively balanced with consistent, make continuous fiber bundle when by impregnating equipment, the fluctuation of disconnected bar or fiber content very easily occurs due to the fluctuation of resin melt flow.
Publication number is disclose the shaping melt impregnation head of a kind of continuous fiber reinforced thermoplastic resin in the patent application of CN102848489A, head inside is provided with melt and distributes runner and dipping runner, each discharging opening that melt distributes runner is connected with dipping runner by discharge roller, the two ends of dipping runner arrange access road and the exit passageway of fibre bundle turnover respectively, between access road and discharge roller, between exit passageway and discharge roller, at least one group of jockey pulley is all set, wherein, discharge roller distributes runner and dipping runner for connecting melt, plays a transition role.Melt impregnation equipment before this equipment is relative has larger improvement, but still comes with some shortcomings.First, resin melt is emerge on the downside of discharge roller equally, is difficult to comprehensive coated wetting fibre bundle, and each root fiber exists and one-sidedly first to infiltrate, the inhomogeneities infiltrated after opposite side; Secondly, to meet the place infiltrated as fiber and resin in the summit of discharge roller by this equipment, because the summit of discharge roller is crest place, tension force is maximum, although can fortifying fibre dipping effect, adds the risk of fibrous fracture, and easily generation is broken the phenomenon of bar; Again, resin melt outlet is divided into two by this equipment, allows long-fiber bundle successively twice infiltration occur, and the melt resistance of two runners is different, the inhomogeneities of melt feeding may be caused, cause larger dipping difference, finally affect fiber content and product appearance.
Summary of the invention
The object of this invention is to provide a kind of melt impregnation equipment of continuous fiber reinforced thermoplastic resin, solve and how to make that continuous fiber floods completely, melt pressure and flow equalization, continuous fiber is dispersed in dipping runner, tension force obtains the technical problem controlling, reduce fiber secondary damage.
Another object of the present invention is a kind of melt impregnation method providing continuous fiber reinforced thermoplastic resin, solve and how to make that continuous fiber floods completely, melt pressure and flow equalization, continuous fiber is dispersed in dipping runner, tension force obtains the technical problem controlling, reduce fiber secondary damage.
The melt impregnation equipment of continuous fiber reinforced thermoplastic resin, comprises head and distributor; Head comprises a fixing die head and two movable die heads; Fixing die internal has the cavity placing and be communicated with above-mentioned two movable die heads, becomes " X " shape in the middle of this cavity; The outer end squarely of each movable die head, intermediate ends triangularity, top are arc; Above-mentioned two movable die heads wherein first movable die head middle and upper part and fixing die head have the first dipping runner, middle and lower part and fixing die head gapless; Second movable die head middle and upper part and fixing die head gapless, middle and lower part and fixing die head have the second dipping runner; First movable die internal has the first melt and distributes runner, and the hot melt spout of distributor is aimed at above-mentioned first melt and distributed runner.
In the middle of described first movable die head and second movable die head, all there is a hole.
The height on the top that described first melt distributes on the left of runner is less than the height formation gap structure on the top on right side.
Also have a second melt distribution runner above the outer end of described first movable die head and intermediate ends intersection, this second melt distributes the opposite side that runner is in the first dipping runner; Distribute runner at this second melt and be equally also provided with a distributor.
The melt impregnation method of continuous fiber reinforced thermoplastic resin, comprises the steps:
A, continuous fiber flood runner by first between first movable die head and fixing die head and enter, and then through fixing die head middle cavity position, finally flood runner from second between second movable die head and fixing die head and flow out;
B, thermoplastic melt go out in above-mentioned two dipping flow passage through the branch flow passage at different levels of two distributors, and dipping runner forms airtight cavity, and thermoplastic melt carries out two-sided dipping to continuous fiber;
C, flood runner through the continuous fiber of melt impregnation from second between second movable die head and fixing die head and flow out.
The invention has the beneficial effects as follows: each discharging opening that melt distributes runner is connected with dipping runner, and controlled like this discharge pressure processed makes to obtain safe dipping by the continuous fiber of preimpregnation; Dipping runner forms airtight cavity after populated hot-melt resin, thus minimizing contacts with air, and the corrugated centre-to-centre spacing of S that the arc of the movable die head the inner of adjustable two is formed or Wave crest and wave trough regulate the tension force of continuous fiber in process of production, so just can solve and how make that continuous fiber floods completely, melt pressure and flow equalization, continuous fiber be uniformly dispersed flooding in runner, tension force is controlled.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the melt impregnation equipment of continuous fiber reinforced thermoplastic resin, wherein eliminates the movable die head on the right;
Fig. 2 is the schematic diagram of two movable die heads;
Fig. 3 is distributor and the schematic diagram flooding runner;
Fig. 4 is the A place partial enlarged drawing in Fig. 3;
Fig. 5 is the schematic diagram of distributor;
Fig. 6 is the left side schematic diagram of distributor;
In figure, 1. heads, 11. fixing die heads, 111. cavitys, 12. movable die heads, 121. outer ends, 122. intermediate ends, 123. tops, 124. first dipping runners, 125. second dipping runners, 126. first melts distribute runner, 127. second melts distribution runners, 128. first movable die heads, 129. second movable die heads, 2. distributor, 3. continuous fiber, 4. extruder.
Detailed description of the invention
Please refer to Fig. 1 to Fig. 6, the melt impregnation equipment of the continuous fiber reinforced thermoplastic resin in figure, comprise a head 1 and two distributors 2.Head 1 is mainly used for the dipping providing internal cavities for continuous fiber, and distributor 2 makes continuous fiber be flooded for spraying molten resin.Head 1 and distributor 2 are integral type structure, make the melt impregnation processing integration of continuous fiber 3, disposal molding.
Head 1 comprises a fixing die head 11 and two movable die heads 12.Fixing die head 11 in use remains motionless, and it is mainly used for installation activity die head 12.In order to install movable die head 12, this fixing die head 11 inside is processed with the cavity placing and be communicated with above-mentioned two movable die heads 12, becomes " X " shape in the middle of this cavity.Outer end 121 squarely of each movable die head 12, intermediate ends 122 triangularity, top 123 are arc; Square structure is mainly used in the level run of continuous fiber 3 and facilitates thermoplastic melt to flood continuous fiber 3; Intermediate ends 122 triangularity and top 123 camber are mainly used in regulating the tension force at continuous fiber 3, so just can solve and how make that continuous fiber 3 floods completely, melt pressure and flow equalization, continuous fiber 3 be uniformly dispersed flooding in runner, tension force is controlled.Above-mentioned two movable die heads 12 wherein first movable die head 128 middle and upper part and fixing die head 11 have the first dipping runner 124, middle and lower part and fixing die head 11 gapless; Second movable die head 129 middle and upper part and fixing die head 11 gapless, middle and lower part and fixing die head 11 have the second dipping runner 125; First movable die head 128 inside has the first melt and distributes runner 126, the hot melt spout of distributor 2 is aimed at above-mentioned first melt and is distributed runner 126, such first dipping runner 124 forms airtight cavity after populated hot-melt resin, thus minimizing contacts with air.Adjustment activity die head 12 conveniently, in the position of fixing die head 11 inside, processes a hole especially, carries out so as required moving outwardly or inwardly in the middle of first movable die head 128 and second movable die head 129.In order to cushion continuous fiber 3 and the dipping process of heatmeltable resin, the height on the top on the left of the first melt distribution runner 126 is made to be less than the height formation gap structure on the top on right side especially.Above-mentionedly just carry out single-side impregnated to continuous fiber 3, in order to carry out two-sided dipping to continuous fiber 3, above the outer end 121 of first movable die head 128 and intermediate ends 122 intersection, be also provided with second melt especially distribute runner 127, this second melt distributes the opposite side that runner 127 is in the first dipping runner 124; Distribute runner 127 at this second melt and be equally also provided with a distributor 2.
The structure of distributor 2 is prior art, and it has multiple branch flow passage, and its structure can be the patent of CN102848489A with reference to publication number.Molten resin in distributor adopts extruder 4 to extrude.
To the process that continuous fiber floods, the said equipment comprises the steps: that first continuous fiber 3 floods runner 124 by first between first movable die head 128 and fixing die head 11 and enters, then through fixing die head 11 middle cavity 111 position, finally flood runner 125 from second between second movable die head 129 and fixing die head 11 and flow out; Then thermoplastic melt goes out in above-mentioned two dipping flow passage through the branch flow passage at different levels of two distributors 2, and dipping runner forms airtight cavity, and thermoplastic melt carries out two-sided dipping to continuous fiber 3; The continuous fiber 3 eventually passing melt impregnation floods runner 125 from second between second movable die head 129 and fixing die head 11 and flows out.
Claims (5)
1. the melt impregnation equipment of continuous fiber reinforced thermoplastic resin, is characterized in that: comprise head and distributor; Head comprises a fixing die head and two movable die heads; Fixing die internal has the cavity placing and be communicated with above-mentioned two movable die heads, becomes " X " shape in the middle of this cavity; The outer end squarely of each movable die head, intermediate ends triangularity, top are arc; Above-mentioned two movable die heads wherein first movable die head middle and upper part and fixing die head have the first dipping runner, middle and lower part and fixing die head gapless; Second movable die head middle and upper part and fixing die head gapless, middle and lower part and fixing die head have the second dipping runner; First movable die internal has the first melt and distributes runner, and the hot melt spout of distributor is aimed at above-mentioned first melt and distributed runner.
2. according to the melt impregnation equipment of the continuous fiber reinforced thermoplastic resin described in claim 1, it is characterized in that: in the middle of described first movable die head and second movable die head, all there is a hole.
3. according to the melt impregnation equipment of the continuous fiber reinforced thermoplastic resin described in claim 1, it is characterized in that: the height on the top that described first melt distributes on the left of runner is less than the height formation gap structure on the top on right side.
4. according to the melt impregnation equipment of the continuous fiber reinforced thermoplastic resin described in claim 1, it is characterized in that: also have a second melt distribution runner above the outer end of described first movable die head and intermediate ends intersection, this second melt distributes the opposite side that runner is in the first dipping runner; Distribute runner at this second melt and be equally also provided with a distributor.
5. the melt impregnation method of continuous fiber reinforced thermoplastic resin, comprises the steps: it is characterized in that:
A, continuous fiber flood runner by first between first movable die head and fixing die head and enter, and then through fixing die head middle cavity position, finally flood runner from second between second movable die head and fixing die head and flow out;
B, thermoplastic melt go out in above-mentioned two dipping flow passage through the branch flow passage at different levels of two distributors, and dipping runner forms airtight cavity, and thermoplastic melt carries out two-sided dipping to continuous fiber;
C, flood runner through the continuous fiber of melt impregnation from second between second movable die head and fixing die head and flow out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410692330.1A CN104369285B (en) | 2014-11-27 | 2014-11-27 | The melt impregnation Apparatus and method for of continuous fiber reinforced thermoplastic resin |
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| CN201410692330.1A CN104369285B (en) | 2014-11-27 | 2014-11-27 | The melt impregnation Apparatus and method for of continuous fiber reinforced thermoplastic resin |
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| CN104369285A true CN104369285A (en) | 2015-02-25 |
| CN104369285B CN104369285B (en) | 2016-08-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111844521A (en) * | 2020-06-19 | 2020-10-30 | 哈尔滨工业大学 | Melt impregnation device and preparation method of continuous fiber reinforced thermoplastic prepreg tape |
| WO2021036045A1 (en) * | 2019-08-26 | 2021-03-04 | 山东格瑞德集团有限公司 | Specialized pressurizing pre-impregnation die head for fiber-reinforced plastic sheet extruder |
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| EP0513927A1 (en) * | 1991-05-16 | 1992-11-19 | Shell Internationale Researchmaatschappij B.V. | Resin-impregnation of fibers |
| CN102639774A (en) * | 2009-12-09 | 2012-08-15 | 东丽株式会社 | Method for producing long fiber nonwoven fabric |
| CN102848489A (en) * | 2012-09-26 | 2013-01-02 | 金发科技股份有限公司 | Continuous melting dipping machine head and method for forming long fiber reinforced thermoplastic resin |
| CN204249147U (en) * | 2014-11-27 | 2015-04-08 | 陶小弟 | The melt impregnation equipment of continuous fiber reinforced thermoplastic resin |
-
2014
- 2014-11-27 CN CN201410692330.1A patent/CN104369285B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0513927A1 (en) * | 1991-05-16 | 1992-11-19 | Shell Internationale Researchmaatschappij B.V. | Resin-impregnation of fibers |
| CN102639774A (en) * | 2009-12-09 | 2012-08-15 | 东丽株式会社 | Method for producing long fiber nonwoven fabric |
| CN102848489A (en) * | 2012-09-26 | 2013-01-02 | 金发科技股份有限公司 | Continuous melting dipping machine head and method for forming long fiber reinforced thermoplastic resin |
| CN204249147U (en) * | 2014-11-27 | 2015-04-08 | 陶小弟 | The melt impregnation equipment of continuous fiber reinforced thermoplastic resin |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021036045A1 (en) * | 2019-08-26 | 2021-03-04 | 山东格瑞德集团有限公司 | Specialized pressurizing pre-impregnation die head for fiber-reinforced plastic sheet extruder |
| US11780119B2 (en) | 2019-08-26 | 2023-10-10 | Shandong Grad Group Co., Ltd. | Pressurizing pre-impregnating die head special for fiber reinforced plastic sheet machine |
| CN111844521A (en) * | 2020-06-19 | 2020-10-30 | 哈尔滨工业大学 | Melt impregnation device and preparation method of continuous fiber reinforced thermoplastic prepreg tape |
| CN111844521B (en) * | 2020-06-19 | 2022-07-08 | 哈尔滨工业大学 | Melt impregnation device and preparation method of continuous fiber reinforced thermoplastic prepreg tape |
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| CN104369285B (en) | 2016-08-24 |
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Effective date of registration: 20190808 Address after: 318000 Huajing Mingyuan Building, Jiaojiang District, Taizhou City, Zhejiang Province, Room 1603, Unit 1 Patentee after: Huang Fuhe Address before: 215427 No. 2-191, West Ring Road, Huangjing Town, Taicang City, Suzhou City, Jiangsu Province Co-patentee before: Li Panpan Patentee before: Tao Xiaodi |