KR20170096667A - Impregnation die for preparing unidirectional prepreg of fiber-reinforced thermoplastic resin - Google Patents

Impregnation die for preparing unidirectional prepreg of fiber-reinforced thermoplastic resin Download PDF

Info

Publication number
KR20170096667A
KR20170096667A KR1020160018060A KR20160018060A KR20170096667A KR 20170096667 A KR20170096667 A KR 20170096667A KR 1020160018060 A KR1020160018060 A KR 1020160018060A KR 20160018060 A KR20160018060 A KR 20160018060A KR 20170096667 A KR20170096667 A KR 20170096667A
Authority
KR
South Korea
Prior art keywords
prepreg
fiber
impregnation die
thermoplastic resin
reinforced thermoplastic
Prior art date
Application number
KR1020160018060A
Other languages
Korean (ko)
Inventor
정석호
방윤혁
정재호
Original Assignee
주식회사 효성
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 주식회사 효성 filed Critical 주식회사 효성
Priority to KR1020160018060A priority Critical patent/KR20170096667A/en
Publication of KR20170096667A publication Critical patent/KR20170096667A/en

Links

Images

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
    • B29C70/506—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 and impregnating by melting a solid material, e.g. sheet, powder, fibres
    • 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
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
    • 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
    • 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
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

The present invention relates to an impregnation die for preparing unidirectional (UD) prepreg of a fiber-reinforced thermoplastic resin. When molding UD prepreg consisting of a thermoplastic resin having a reinforced fiber in a desired cross section form, an internal structure of an emission unit of the impregnation die for preparing prepreg is changed into a curved shape so the width of the fiber is increased and a split between fibers is prevented to maintain a sheet form of prepreg.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impregnation die for preparing a unidirectional (UD) prepreg of a fiber-reinforced thermoplastic resin,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impregnation die for producing a unidirectional (UD) prepreg of a fiber-reinforced thermoplastic resin, and more particularly, to a method of molding a unidirectional prepreg, To a novel impregnation die for forming a unidirectional prepreg which is capable of increasing the width of the fiber and preventing the splitting between fibers to maintain the sheet shape of the prepreg by deforming the internal structure of the impregnation die for production to a bent shape .

The fiber-reinforced thermoplastic resin is lightweight and has excellent strength and is used in various industrial fields such as automobiles and electronic devices.

Prepregs for using such a fiber-reinforced thermoplastic resin are prepared by film lamination, impregnation die, and in-situ polymerization.

Among these methods, a film laminating process or an impregnating die is used in the case of a unidirectional prepreg (UD-prepreg). In the case of film laminating, a film manufacturing process is further required. In the case of using an impregnating die, The width of the product is not wide.

Thermoplastic resins having a higher viscosity than thermosetting resins have been subjected to various methods for achieving uniform fiber impregnation properties that affect quality and appearance due to their high viscosity characteristics. In particular, the prepreg of a thermoplastic resin may be required as a requirement that the expansion in the width direction is required depending on the application field.

However, it is known that the thermoplastic resin is difficult to maintain the shape of the prepreg because of the problem of splitting when it expands in the width direction in the process of discharging through the outlet of the impregnation die due to the relatively high viscosity.

Japanese Laid-Open Patent Application No. 1995-205307 discloses a method for forming a prepreg in a desired cross-sectional shape while running while running a long prepreg made of a thermoplastic resin containing reinforcing fibers such as carbon fibers, Wherein the molding die is continuous from the prepreg inlet to the prepreg outlet while the prepreg traveling passage is wound around the heating portion and the inside of the cooling portion respectively.

However, also in such a case, there is a problem in that splitting between fibers can not be avoided in the process of expanding in the width direction in the process of being discharged to the outlet of the impregnation die.

Japanese Laid-Open Patent Application No. 1995-205307

In order to solve the problems of the prior art as described above, it is an object of the present invention to manufacture a prepreg expanded in the width direction while preventing the splits appearing at the time of manufacturing the prepreg using the impregnation die of the fiber-reinforced thermoplastic resin.

It is therefore an object of the present invention to provide a impregnation die of a new structure which prevents the split from occurring while increasing the opening width of the fiber during preparation of the prepreg of the fiber reinforced thermoplastic resin.

In order to solve the above problems, the present invention provides an impregnation die for preparing a prepreg of a fiber-reinforced thermoplastic resin, wherein a prepreg discharge portion of the impregnation die is formed so as to have a concave- Provided is an impregnation die structure for manufacturing a unidirectional (UD) prepreg.

According to the present invention, the inner surface of the prepreg discharge portion of the impregnation die for preparing the prepreg of the fiber-reinforced thermoplastic resin is formed into a concave-convex shape so that the lip portion of the impregnation die for preparing the prepreg of the fiber- It is possible to manufacture a prepreg having a wide fiber width discharged from the impregnation die through an increase in the number of fibers while preventing a splitting phenomenon of the fiber even with a simple shape change to the discharge port .

1 is a schematic diagram conceptually showing the structure of a general unidirectional prepreg-producing impregnation die.
FIG. 2 is a conceptual view showing a splitting structure of fibers when the fiber width is increased when the impregnated die prepreg is manufactured in a conventional shape.
FIG. 3A illustrates an embodiment of the shape of the prepreg discharge portion of the impregnation die having the concavo-convex curved surface according to the present invention. In the case of the fiber having passed through the impregnation die, the prepreg is manufactured to have a wide width without splitting It is a conceptual drawing.
FIG. 3B is a view illustrating another embodiment of the shape of the prepreg discharge portion of the impregnation die having the concavo-convex curved surface according to the present invention.
FIG. 4A is a view showing the structure of the discharging portion of the impregnation die applied in the comparative example according to the present invention.
4B-4D are views showing various forms of an improved discharge structure of an impregnation die applied in an embodiment according to the present invention.
5A is a photograph of the appearance of a prepreg produced according to a comparative example of the present invention.
Figure 5b is a photograph of the appearance of a prepreg produced in accordance with an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail as an embodiment.

In the impregnation die for producing a unidirectional prepreg of a fiber-reinforced thermoplastic resin, the prepreg discharge portion of the impregnation die has a protruding portion formed on the inner surface of the discharge portion, and the inner surface of the prepreg discharge portion is formed into a concave- ≪ / RTI >

Generally, an impregnation die is used to prepare a fiber-reinforced thermoplastic resin as a unidirectional prepreg. In this case, there is a disadvantage in that the fiber opening width of the fiber produced after passing through the resin outlet of the impregnation die is not wide. The reason for this is that the viscosity of the thermoplastic resin is high. For this purpose, impregnation dies of the type shown in Fig. 1 are used to ensure uniform impregnation properties affecting quality and appearance.

The impregnation die to which the present invention is applied has a fiber inlet 10 on one side and a resin injection section 20 on both sides of the fiber inlet 10 as shown in Fig. A fiber moving groove 30 in which the resin is mixed and moved and a prepreg discharging portion 30 which is positioned on the opposite side of the fiber inlet 20 with respect to the fiber moving groove 30 and is capable of adjusting a gap, (Lip) 40 may be used.

2, the prepreg 50 after passing through the prepreg discharging portion 40 of the impregnating die is divided into a plurality of split portions, A phenomenon occurs.

According to a preferred embodiment of the present invention, the inner surface 410 of the prepreg discharge portion 400 of the impregnation die, as shown in FIG. 3A, And is used as a structure.

As described in the present invention, when the impregnated die prepreg discharge portion 400 is formed with a structure having a curved path, the split phenomenon does not occur even when the opening width of the prepreg is expanded.

Figure 3a illustrates one embodiment of the shape of the discharge portion 400 of the impregnation die having a concavo-convex curved surface according to the present invention, wherein a protrusion 420 is formed on the inner surface 410 of the prepreg discharge portion 400 And has a concavo-convex structure. In this drawing, the fibers passing through the impregnation die having the structure of the discharge part 400 according to the present invention conceptually show that the prepreg 500 is manufactured to have a wide width without splitting.

The present invention is characterized in that a convex-and-concave structure is formed on the inner surface 410 of the discharge portion 400 in the prepreg discharge portion 400 of the impregnation die, as shown in FIG. 3A.

Other prepreg discharging units constructed by the method similar to that of FIG. 3A of the present invention may be configured as shown in FIG. 3B. The structure of FIG. 3B can be used in a more advanced structure as a preferred embodiment of the present invention.

The concavo-convex structure of the inner surface 410 of the prepreg discharge portion of the impregnation die according to the present invention can be manufactured with a structure in which 2 to 10 protrusions 420 are formed. The concavo-convex structure of the discharge port inner surface is such that the movement path of the resin-impregnated fiber passing through the prepreg discharge portion passes through a curved path instead of a straight line.

As a result, it is surprising that there is a remarkable effect that the opening width of the prepreg is kept wide and splits do not occur between the fibers.

According to a preferred embodiment of the present invention, the uneven surface may have a structure in which 2 to 6, more preferably 2 to 4, projections are formed in a zigzag shape on the inner surface of the discharge portion. These protrusions are more preferably formed at regular intervals.

The impregnation die structure according to the present invention exhibits a very good effect while simply changing the conventional impregnation die structure.

That is, according to the present invention, when the impregnation die is applied, the resin can be impregnated into the fiber more easily by simply changing the internal surface structure of the discharge portion in which the resin is impregnated into the fiber, The fiber width reduction phenomenon of the prepreg can be prevented.

In the preparation of a prepreg using a known impregnation die having a known structure, the input fiber has a reduced opening width due to the pressure and viscosity of the resin to be injected, and a split occurs between the fibers and the fibers. Further, when the number of fibers is increased to expand the width of the single prepreg, it is difficult to maintain the sheet form of the prepreg.

According to the present invention, by using the existing impregnation die as it is and by newly constructing the internal structure of the pregreg discharge portion (Lip) of the impregnation die, the opening width of each fiber is increased while expanding the width through additional opening after resin impregnation It is possible to prevent split between fibers and to maintain the shape of the prepreg sheet.

Hereinafter, the present invention will be described by way of examples, but the present invention is not limited by the examples.

Comparative Example, Examples 1 to 3

4 (a) and 4 (d), the impregnation die having a basic structure having a shape as shown in Fig. 1 is used, For the case of four protrusions, prepreg sheets were produced under the same conditions by using three types of discharge port structures (Examples 1 to 3) having different height and protrusion shapes.

The preparation of such a prepreg is a fiber-reinforced thermoplastic composite material containing carbon fibers, and a polycarbonate resin is impregnated with a prepreg sheet (width: 300 mm) using an impregnation die (size: 540 mm in width, Or more).

As a result, in comparison between the case of using the impregnating die having the structure of FIG. 4A and the case of using the impregnating die of the structure of FIG. 4B to FIG. 4D, the prepregs of FIGS. 4B to 4D (Examples 1 to 3) All of the prepregs were produced without splitting, and the appearance was improved. In the case of FIG. 4A (comparative example), however, splitting occurred.

In order to compare the results, the comparison results of the photographs of the prepregs prepared according to the comparative example and the example 1 are shown in FIGS. 5A and 5B, respectively.

10 - Fiber inlet
20 - resin inlet
30 - Fiber Groove Groove
40, 400 - prepreg discharge portion
410 - Inner side of outlet
420 - protrusion
50, 500 - prepreg

Claims (4)

(UD) prepreg of a fiber-reinforced thermoplastic resin, characterized in that the prepreg discharge portion of the impregnation die is formed so as to have a concave-convex curved path on the inner surface of the discharge portion thereof, Impregnation die for leg manufacture. [Claim 2] The impregnation die of claim 1, wherein the impregnation die has a fiber inlet for one side and a fiber inlet groove for introducing the resin and the resin to be injected through the fiber inlet groove, (UD) prepreg for fabricating a fiber-reinforced thermoplastic resin, characterized in that the impregnation die has a prepreg discharging portion (Lip) positioned on the opposite side of the fiber inlet from the moving groove and capable of adjusting a gap. [Claim 2] The fiber according to claim 1, wherein the inner surface of the prepreg discharge portion has 2 to 10 protrusions, so that the movement path of the resin-impregnated fiber passing through the prepreg discharge portion passes through a curved path, Impregnation die for the preparation of unidirectional (UD) prepregs of reinforced thermoplastic resins. 4. The impregnation die for producing a unidirectional (UD) prepreg of a fiber-reinforced thermoplastic resin according to claim 3, wherein the protrusions are formed at equal regular intervals in a zigzag position.
KR1020160018060A 2016-02-16 2016-02-16 Impregnation die for preparing unidirectional prepreg of fiber-reinforced thermoplastic resin KR20170096667A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160018060A KR20170096667A (en) 2016-02-16 2016-02-16 Impregnation die for preparing unidirectional prepreg of fiber-reinforced thermoplastic resin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160018060A KR20170096667A (en) 2016-02-16 2016-02-16 Impregnation die for preparing unidirectional prepreg of fiber-reinforced thermoplastic resin

Publications (1)

Publication Number Publication Date
KR20170096667A true KR20170096667A (en) 2017-08-25

Family

ID=59761521

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160018060A KR20170096667A (en) 2016-02-16 2016-02-16 Impregnation die for preparing unidirectional prepreg of fiber-reinforced thermoplastic resin

Country Status (1)

Country Link
KR (1) KR20170096667A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190115146A (en) * 2018-03-30 2019-10-11 주식회사 이지컴퍼지트 Apparatus for manufacturing tow prepreg and method for the same
KR20230071982A (en) 2021-11-17 2023-05-24 (주)엘엑스하우시스 Width adjustment guide device, apparatus and method of manufacturing continuous fiber composite having the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190115146A (en) * 2018-03-30 2019-10-11 주식회사 이지컴퍼지트 Apparatus for manufacturing tow prepreg and method for the same
KR20230071982A (en) 2021-11-17 2023-05-24 (주)엘엑스하우시스 Width adjustment guide device, apparatus and method of manufacturing continuous fiber composite having the same

Similar Documents

Publication Publication Date Title
US8663519B2 (en) Method and device for producing fiber-reinforced plastic profile parts
JP6821922B2 (en) A device for impregnating reinforcing fibers with resin and a method for impregnating reinforcing fibers with resin.
EP3028852B1 (en) Continuous fiber reinforced resin composite material and molded article thereof
WO2016031005A1 (en) Composite material comprising unidirectional continuous fibers and thermoplastic resin
US6033510A (en) Method for fabricating composite structures using pultrusion processing
EP3256300B1 (en) Pultrusion apparatus and method
RU2513425C2 (en) Method to manufacture hybrid indefinite shape of high stiffness and also hybrid continuous shape of high stiffness
US20140186600A1 (en) Low pressure thermoplastic molding materials for fiber-reinforced composite structures
CN106273554B (en) Device and method for producing a composite reinforcing component
KR20170096667A (en) Impregnation die for preparing unidirectional prepreg of fiber-reinforced thermoplastic resin
JP2013132890A (en) Method for manufacturing fiber-reinforced plastic tape, and manufacturing apparatus used therefor
EP2527130B1 (en) Laying-up method for non-planar composite material components
CN202115036U (en) Multi-axial yarn bundle reinforced thermoplastic preconsolidation sheet
WO2009080735A2 (en) Piece made of composite material with areas of different thickness
JP2007269034A (en) Fiber-reinforced composite material
DE3542217A1 (en) METHOD FOR PRODUCING COMPONENTS FROM FIBER REINFORCED THERMOPLASTICS
KR20180029350A (en) Manufacturing method of continuous carbon fiber-reinforced composite materials and manufacturing method of composite formed article
KR101446624B1 (en) Manufacturing method of fiber-oriented composite material and its products manufactured thereby
KR101108893B1 (en) Antenna cover manufacturing apparatus and its manufacturing method
GB2098123A (en) Moulding curved reinforced plastics objects
WO1995003933A1 (en) Process for producing a moulded part made of thermoplastic material
WO2013122207A1 (en) Method for manufacturing fiber-reinforced resin
KR102142700B1 (en) Nozzle for 3D Printer Comprising Eccentric Outlet and 3D printer Comprising the Nozzle
KR20190014677A (en) Plastic resin extrudate for air hole prevention and method of manufacturing the same
DE102018105762B3 (en) Process for producing a fiber laminate and a fiber composite component