KR101822258B1 - Maunfacturing method for reinforcement - Google Patents

Maunfacturing method for reinforcement Download PDF

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Publication number
KR101822258B1
KR101822258B1 KR1020160026524A KR20160026524A KR101822258B1 KR 101822258 B1 KR101822258 B1 KR 101822258B1 KR 1020160026524 A KR1020160026524 A KR 1020160026524A KR 20160026524 A KR20160026524 A KR 20160026524A KR 101822258 B1 KR101822258 B1 KR 101822258B1
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KR
South Korea
Prior art keywords
mold
prepreg
resin
resin layer
injection step
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Application number
KR1020160026524A
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Korean (ko)
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KR20170104092A (en
Inventor
김창동
마동희
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현대자동차주식회사
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Priority to KR1020160026524A priority Critical patent/KR101822258B1/en
Publication of KR20170104092A publication Critical patent/KR20170104092A/en
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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
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • B29C65/782—Positioning the parts to be joined, e.g. aligning, indexing or centring by setting the gap between the parts to be joined
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core

Abstract

Disposing a prepreg made of reinforcing fibers and resin between the first mold and the second mold; A molding step of pressing and molding the prepreg through the first mold and the second mold; A first spacing step of forming a space between the first mold and the prepreg by spacing a first mold from the prepreg after forming the prepreg; A first injection step of injecting resin into a space formed between the first mold and the prepreg to form a first resin layer on one surface of the prepreg; A second spacing step of forming a space between the second mold and the prepreg by spacing a second mold from the prepreg after formation of the first resin layer; And a second injection step of injecting resin into a space formed between the second mold and the prepreg to form a second resin layer on the other surface of the prepreg.

Description

{MAUNFACTURING METHOD FOR REINFORCEMENT}

The present invention relates to a method of forming a stiffener which can be carried out in one mold for forming a shape (40) of a stiffener during injection molding and resin injection.

A reinforcing member is previously molded in accordance with the mold shape 40 by a method for integrally forming parts other than plastic such as a metal part, a cable, a circuit board magnet and the like on a stiffening material for securing rigidity of a conventional plastic product, And then injected resin into it to produce the product.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

10-2011-0056183 A

An object of the present invention is to provide a reinforcing material forming method capable of proceeding from a mold having a shape (40) and a resin injection of a reinforcing material (40) during injection molding.

According to another aspect of the present invention, there is provided a method of forming a stiffener, the method comprising: disposing a prepreg made of a reinforcing fiber and a resin between a first mold and a second mold; A molding step of pressing and molding the prepreg through the first mold and the second mold; A first spacing step of forming a space between the first mold and the prepreg by spacing a first mold from the prepreg after forming the prepreg; A first injection step of injecting resin into a space formed between the first mold and the prepreg to form a first resin layer on one surface of the prepreg; A second spacing step of forming a space between the second mold and the prepreg by spacing a second mold from the prepreg after formation of the first resin layer; And a second injection step of injecting resin into a space formed between the second mold and the prepreg to form a second resin layer on the other surface of the prepreg.

And a separation step of curing the resin, the first resin layer and the second resin layer of the prepreg after the second injection step, and then demolding the resin from the mold.

At least one of the first mold and the second mold may have a rib shape 40 formed at a negative angle and a rib may be formed in the first resin layer or the second resin layer in the first injection step or the second injection step.

Wherein at least one of the first mold and the second mold is formed with an engaging space in which the engaging tool is disposed at a negative angle and in the first injecting step or the second injecting step the engaging tool is inserted into the first resin layer or the second resin layer, .

In the first injection step and the second injection step, the same resin as the resin of the prepreg can be injected.

And a rotating step of rotating the entire mold so that the first mold positioned at the upper portion is located at the lower portion and the second mold positioned at the lower portion is positioned at the upper portion after the first injection step.

And a first fixing step of fixing a position of the prepreg in the mold by projecting a plurality of guide pins having the same length as the spaced distance from the first mold toward the prepreg after the first spacing step .

And a second fixing step of fixing a position of the prepreg in the mold by projecting a plurality of guide pins having the same length as the spaced distance from the second mold toward the prepreg after the second spacing step .

According to the method for forming a stiffener of the present invention as described above, it is possible to carry out the molding of the shape of the stiffener 40 and injection of resin into one mold at the time of injection molding. As a result, it is possible to reduce the cost of the product by reducing the mold cost and it is not necessary to form the prepreg twice, which makes it possible to reduce the number of steps in the manufacturing process.

In addition, it is possible to form rigid complementary ribs which are difficult to apply in conventional RTM (Resin Transfer Molding) and PCM (Prepreg Compression Molding), and insert injection of fastening tools such as insert bolts and insert nuts.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows a layout step according to an embodiment of the invention.
Figure 2 shows a forming step according to an embodiment of the invention.
3 illustrates a first spacing step in accordance with an embodiment of the present invention.
4 illustrates a first fixation step in accordance with an embodiment of the present invention.
Figure 5 illustrates a first implant step in accordance with an embodiment of the present invention.
Figure 6 illustrates a rotation step according to an embodiment of the present invention.
Figure 7 illustrates a second spacing step according to one embodiment of the present invention.
8 illustrates a second securing step in accordance with an embodiment of the present invention.
9 illustrates a second implantation step in accordance with one embodiment of the present invention.
10 illustrates a demolded stiffener in accordance with an embodiment of the present invention.
11 is a view showing a rib shape of an engraved formed in a metal mold according to an embodiment of the present invention.
12 illustrates a stiffener having ribs formed therein according to an embodiment of the present invention.
13 is a view showing an arrangement space of a relief formed in a mold according to an embodiment of the present invention;
Figure 14 illustrates a stiffener in which a fastening tool is insert injected according to one embodiment of the present invention.
15 illustrates a flow diagram in accordance with an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

A method of forming a stiffener according to the present invention includes a placement step (S100) of arranging a prepreg composed of reinforcing fibers and a resin between a first mold (10) and a second mold (20); A forming step S200 of pressing the prepreg 100 through the first mold 10 and the second mold 20 to form the prepreg 100; A first separation step S300 of forming a space between the first mold 10 and the prepreg 100 by separating the first mold 10 from the prepreg 100 after the molding of the prepreg 100, ; A first injection step (S500) of injecting resin into a space formed between the first mold (10) and the prepreg (100) to form a first resin layer (200) on one surface of the prepreg (100); A second spacing step of forming a space between the second mold 20 and the prepreg 100 by leaving the second mold 20 at a predetermined distance from the prepreg 100 after the first resin layer 200 is formed S700); And a second injection step (S900) of injecting resin into a space formed between the second mold (20) and the prepreg (100) to form a second resin layer (300) on the other surface of the prepreg (100) .

After the second injection step S900, a separation step S1000 of curing the resin of the prepreg 100, the first resin layer 200 and the second resin layer 300 and then releasing the resin from the mold .

First, as shown in FIG. 1, a prepreg 100 is disposed between the first mold 10 and the second mold 20 in a placement step S100. At this time, the prepreg 100 may not be in a molded state but may be a prepreg 100 before molding. After forming the prepreg 100, the first mold 10 or the second mold 20 is moved to form the prepreg 100 as shown in FIG. 2, Pressure.

In the first separation step S300, the first mold 10 is separated from the prepreg 100 by a predetermined distance as shown in FIG. At this time, the molded prepreg 100 is held on the side of the second mold 20. The first mold 10 corresponds to the upper mold and the second mold 20 corresponds to the lower mold so that the first mold 10 as the upper mold is separated from the second mold 20, 100 may be in a state of being seated on the side of the second metal mold 20 which is the lower mold by its own weight.

After the first separation step S300, a first injection step S500 of injecting resin into the space formed between the first mold 10 and the prepreg 100 seated on the second mold 20, as shown in FIG. 5, Is performed. The first resin layer 200 is formed on one surface of the prepreg 100 by the injection of the resin and the thickness of the first resin layer 200 is set such that the thickness of the first resin layer 200 is less than the thickness of the prepreg 100, Legs 100 are spaced apart from one another.

Preferably, the first resin layer 200 formed on one surface of the prepreg 100 is cured after the first injection step S500. When the first resin layer 200 is cured, a second separation step S700 is performed in which the second mold 20 is separated from the prepreg 100 mounted on the first mold 10 by a predetermined distance as shown in FIG. 7 .

If the first mold 10 corresponds to the upper mold and the second mold 20 corresponds to the lower mold in the first separation step S300, the second separation step S700 may be performed in a state where the first resin layer 200 is a prepreg The second mold 20 must be separated downward in a state where the legs 100 are seated without dropping due to their own weight in the first mold 10 being the upper mold.

The second mold 20 is separated from the prepreg 100 placed on the first mold 10 by a predetermined distance in the second spacing step S700 and then the second mold 20 and the first mold 20 A second injection step (S900) of injecting resin into the space formed between the prepregs (100) placed on the mold (10) is performed. The second resin layer 300 is formed on the other surface of the prepreg 100 by the injection of the resin and the thickness of the second resin layer 300 is set such that the second mold 20 is seated on the first mold 10 And is spaced apart from the prepreg 100 by a distance.

The first resin layer 200 and the second resin layer 300 are cured and separated from the mold through the separation step S1000 to form a stiffener having a resin layer on the upper and lower surfaces of the prepreg 100 as shown in FIG. .

As the resin of the prepreg 100, the first resin layer 200, and the second resin layer 300, a thermoplastic resin and a thermosetting resin may be used. The reinforcing fibers of the prepreg 100 may be carbon fibers, glass fibers, and aramid fibers. However, the present invention is not limited thereto.

Preferably, in the first injection step (S500) and the second injection step (S900), the same resin as the resin of the prepreg (100) is injected so that the resin of the prepreg (100) The resin of the resin layer 300 is the same, so that it is possible to prevent the separation rigidity of the dissimilar material from being lowered.

A method in which a preform or a prepreg 100 including a conventional reinforcing fiber is firstly formed through a mold and a molded preform or prepreg 100 is put into a different mold again to inject the resin and then to form the mold again Alternatively, the method of forming a stiffener according to the present invention can reduce the cost of a product by making it possible to manufacture a product through a single mold, and it is not necessary to form the prepreg 100 twice, There are advantages.

At least one of the first mold 10 and the second mold 20 has a rib shape 40 formed at an obtuse angle so that in the first injection step S500 or the second injection step S900, The ribs 400 may be formed on the first resin layer 200 or the second resin layer 300.

As shown in FIG. 11, when a plurality of indentations are formed on the inner surfaces of the first mold 10 or the second mold 20 and the resin is injected in the first injection step S500 or the second injection step S900, 1 mold (10) or the second mold (20). As a result, as shown in FIG. 12, ribs 400 having the same shape as a depressed shape are formed in the first resin layer 200 or the second resin layer 300.

Similarly, at least one of the first mold 10 and the second mold 20 is formed with an arrangement space 50 in which the fastening tool 500 is disposed as shown in FIG. 13, so that the first injection step (S500) 2, the fastening tool 500 may be insert-injected into the first resin layer 200 or the second resin layer 300 in step S900.

Such as an insert bolt or insert nut or the like having a plurality of engraved surfaces formed on the inner surface of the first metal mold 10 or the second metal mold 20 and a size smaller than the arrangement space 50 in the arrangement space 50 due to the engraved shape, The resin is filled into the recessed portion between the placement space 50 and the fastening tool 500 when the resin is injected in the first injection step S500 or the second injection step S900. Accordingly, the fastening tool 500 can be insert-injected into the first resin layer 200 or the second resin layer 300 as shown in FIG.

In the method of forming a stiffener according to the present invention, after the first injection step S500, the first mold 10 located at the upper portion is positioned at the lower portion and the second mold 20 located at the lower portion is positioned at the upper portion (S600) in which the entire mold is rotated to rotate the mold.

As described above, when the first mold 10 corresponds to the upper mold and the second mold 20 corresponds to the lower mold, the first mold 10, which is the upper mold in the second separation step S700, 100) should not fall.

Therefore, after the first injection step (S500), the first mold (10) positioned at the upper portion is positioned at the lower portion by rotating the mold 180 ° as a whole through the rotation step (S600) before the second separation step (S700) And the second metal mold 20 located at the lower portion is positioned at the upper portion. Accordingly, even if the second mold 20 is separated from the prepreg 100, the prepreg 100 can be held in the first mold 10 positioned at the lower portion.

After the first separation step S300, a plurality of guide pins 30 having a length equal to the distance as shown in FIG. 4 are protruded from the first mold 10 toward the prepreg 100, A first fixing step S400 of fixing the position of the light source 100 may be performed.

The prepreg 100 is fixed so that the prepreg 100 is not moved in the second mold 20 due to the presence of the plurality of guide pins 30 and at the same time the first mold 10 is separated from the prepreg 100 The shape of the first resin layer 200 can be maintained.

The guide pin 30 is inserted into the mold and can be deployed toward the prepreg 100 when the first mold 10 is separated. At this time, it is preferable that the guide pin 30 is formed in the form of a thin rod so as not to damage the outer shape of the first resin layer 200. Alternatively, the guide pin 30 is formed of an elastic member, and when the first mold 10 is separated, the prepreg 100 can be fixed with a resilient restoring force.

After the second spacing step S700, a plurality of guide pins 30 having the same length as the spaced distance as shown in FIG. 8 are projected from the second mold 20 toward the prepreg 100, A second fixing step S800 for fixing the position of the prepreg 100 may be performed.

The prepreg 100 is fixed so that the prepreg 100 is not moved in the first mold 10 due to the presence of the plurality of guide pins 30 and at the same time the second mold 20 is separated from the prepreg 100 The shape of the first resin layer 200 can be maintained.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

10: first mold 20: second mold
30: guide pin 50: positioning space
100: prepreg 200: first resin layer
300: second resin layer 400: rib
500: fastening tool S100: placement step
S200: Forming step S300: First separation step
S400: first fixing step S500: first injection step
S600: rotation step S700: second separation step
S800: second fixing step S900: second injection step
S1000: Separation step

Claims (8)

Disposing a prepreg made of reinforcing fibers and resin between the first mold and the second mold;
A molding step of pressing and molding the prepreg through the first mold and the second mold;
A first spacing step of forming a space between the first mold and the prepreg by spacing a first mold from the prepreg after forming the prepreg;
A first fixing step of fixing a position of the prepreg in the mold by projecting a plurality of guide pins made of an elastic material so as to have the same length as the distance from the first mold toward the prepreg;
A first injection step of injecting resin into a space formed between the first mold and the prepreg to form a first resin layer on one surface of the prepreg;
A second spacing step of forming a space between the second mold and the prepreg by spacing a second mold from the prepreg after formation of the first resin layer;
A second fixing step of fixing a position of the prepreg in the mold by projecting a plurality of guide pins made of an elastic material so as to have the same length as the distance from the second mold toward the prepreg; And
And a second injection step of injecting resin into a space formed between the second mold and the prepreg to form a second resin layer on the other surface of the prepreg. The method according to claim 1,
After the second implantation step,
And separating the prepreg resin, the first resin layer, and the second resin layer from each other after curing the resin. The method according to claim 1,
Wherein at least one of the first mold and the second mold has a rib shape formed at an obtuse angle,
Wherein a rib is formed in the first resin layer or the second resin layer in the first injection step or the second injection step. The method according to claim 1,
Wherein at least one of the first mold and the second mold is formed with an engaging space in which engaging tools are disposed at an obtuse angle,
Wherein the fastening tool is insert-injected into the first resin layer or the second resin layer in the first injection step or the second injection step. The method according to claim 1,
In the first injection step and the second injection step,
And the same resin as the resin of the prepreg is injected. The method according to claim 1,
After the first implantation step,
Further comprising a rotating step of rotating the entire mold so that the first mold positioned at the upper portion is positioned at the lower portion and the second mold positioned at the lower portion is positioned at the upper portion. delete delete
KR1020160026524A 2016-03-04 2016-03-04 Maunfacturing method for reinforcement KR101822258B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102148852B1 (en) * 2019-04-16 2020-08-27 사단법인 캠틱종합기술원 Method for manufacturing hollow-formed structure using prepreg insert objects supplied in multiple stages

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
CN108327314A (en) * 2017-01-20 2018-07-27 合肥杰事杰新材料股份有限公司 A kind of injection molding method of sandwich type fiber reinforced thermolplastic composite material
KR102067247B1 (en) * 2018-05-04 2020-01-17 최영진 Method for manufacturing Kitchen Utensils with Steel Core
KR102218081B1 (en) * 2019-03-19 2021-02-24 (주)네프 Manufacturing method of rubber composites with carbon fiber for connection device of Photovoltaic Unit Module in Water Solar Power Generation and rubber composite with carbon fiber connection device

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JP2006007492A (en) 2004-06-23 2006-01-12 Toyota Motor Corp Manufacturing method of preform made of frp
JP2008080523A (en) 2006-09-26 2008-04-10 Toyota Boshoku Corp Method for producing foamed resin molding

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
JP2006007492A (en) 2004-06-23 2006-01-12 Toyota Motor Corp Manufacturing method of preform made of frp
JP2008080523A (en) 2006-09-26 2008-04-10 Toyota Boshoku Corp Method for producing foamed resin molding

Cited By (1)

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Publication number Priority date Publication date Assignee Title
KR102148852B1 (en) * 2019-04-16 2020-08-27 사단법인 캠틱종합기술원 Method for manufacturing hollow-formed structure using prepreg insert objects supplied in multiple stages

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