CN108749041A - A kind of impregnation mold - Google Patents
A kind of impregnation mold Download PDFInfo
- Publication number
- CN108749041A CN108749041A CN201810707875.3A CN201810707875A CN108749041A CN 108749041 A CN108749041 A CN 108749041A CN 201810707875 A CN201810707875 A CN 201810707875A CN 108749041 A CN108749041 A CN 108749041A
- Authority
- CN
- China
- Prior art keywords
- needle
- preformed member
- mold
- recess portion
- mould
- 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
- 238000005470 impregnation Methods 0.000 title claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 26
- 239000011347 resin Substances 0.000 claims abstract description 26
- 238000002347 injection Methods 0.000 claims abstract description 23
- 239000007924 injection Substances 0.000 claims abstract description 23
- 239000004744 fabric Substances 0.000 claims abstract description 17
- 238000009954 braiding Methods 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 description 10
- 238000007598 dipping method Methods 0.000 description 9
- 230000007547 defect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 238000009745 resin transfer moulding Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
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
- B29C70/42—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
- B29C70/48—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 and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
-
- 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
-
- 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
- B29C70/541—Positioning reinforcements in a mould, e.g. using clamping means for the reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
- B29L2031/082—Blades, e.g. for helicopters
- B29L2031/085—Wind turbine blades
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of impregnation molds, the mold has the first and second parts, first and second part is equipped with respective recess portion, the recess portion, which defines, can receive preformed member, at least one injection device of wherein mold allows to inject resin to impregnate the preformed member, wherein described at least one injection device has multiple tubular needles, and the multiple tubular needle can extend from least one of first recess portion and second recess portion allows injecting resin at least to penetrate the braided fabric of the preformed member.The injection needle of the present invention can penetrate the braided fabric of preformed member, in order to which resin to be injected into the braiding center of preformed member.
Description
Technical field
The present invention relates to injection molding technology fields, and in particular to a kind of impregnation mold.
Background technology
Resin transfer moulding (RTM) technique is a kind of manufacturing process, it is well known in the prior art, it is wrapped
It includes in the seal chamber being placed on the fiber preform body at least one dry fabric outer wall in the mold that shape is recess portion,
It is used in combination dipping object to fill the cavity, typically epoxy resin.The outer wall of preform or entire preform, are typically to pass through
The fiber of such as carbon fiber etc is woven to produce.For example, in the context of the manufacture preformed member made of fiber completely
In, basic three-dimensional braid is generated, the shape for the preform to be obtained then is cut to, then places it in
In impregnation mold.Impregnation mold usually has lower part, has the cavity for the part for limiting recess portion, and may be affixed to down
Portion limits another part of recess portion with the top of closed mould.During mold is closed, the lower part and top of the mold
It is abutted at engaging zones.Once preform is placed in the cavity of the lower part of impregnation mold, and the top of mold
It has been closed on the lower part, in injection manipulation, the impregnated resin of preform, wherein liquid resin are noted
Enter into IMPR mold.In the injection manipulation, partial vacuum is generated in a mold, and thermosetting resin is injected into
In impregnation mold, to impregnate entire preformed member.When it is propagated in a groove, the shape of recess portion is presented in resin.Then will
Preformed member and resin heating are to polymerize simultaneously therefore hardening resin.The resin polymerizeing in this way generates final rigid portion
Point, the shape of shape and recess portion matches.Then impregnation mold is opened, final component is then taken out.The preform in recess portion
The arrangement of part can generate the preferred path of resin flowing.For example, these paths are located at along die edge or preformed member edge
The lower part of impregnation mold and the joint on top.By the resin of these flow paths than its remaining part of dipping preform
The resin divided is propagated faster.As a result, the non-homogeneous dipping of preform, this may cause porous zone to appear in resin
Spread insufficient position.It generally can not predict the position of these porous zones, therefore can not possibly specially arrange to be intended to overcome this
The injection areas of defect.Depending on the space freely discharged by these preferred paths, porosity defects may more or less be shown
It writes.However, porosity defects are typically only capable to just be noted after injecting and taking out from mold in part.If porosity
It is too high, that is to say, that usually more than 3%, then part must be scrapped, because repair procedure can not possibly be carried out.
In fact, RTM injection techniques another disadvantage is that the difficulty that is encountered in thorough impregnation strand and being located at portion
Part weaves the space between stock.The defect of space dipping between strand and/or stock also leads to the gas hole defect in part
Occur.In addition, the dipping and progress of polymerisation are the non-homogeneous phenomenons influenced by accessory size and/or its difference in thickness.?
The difference of dipping and/or polymerization between two regions of component may lead to the internal stress generated in moulding process, this is interior
Portion's stress has no significant effect to its service life and from the deformation after mold removal.For other purposes, it is also proposed that by having pottery
The other kinds of composite component of prefabricated component made of the composite material of porcelain basal body, this material are permeated by gas and hardened.
This technical solution also has other shortcomings, in particular, the material penetrated into gaseous form penetrate into first it is pre-
The surface layer of formed body, to make its sealing.From that time, the substance of infiltration cannot penetrate the inside of precast body again.Therefore,
Before any new dipping of preform inner, it is necessary to by machined portions remove the material on surface layer.Final component
Manufacture need final component acquisition before material and dipping continuous cycle.
Technical solution
The invention mainly solves the technical problem of providing a kind of impregnation molds, for manufacturing made of composite material
Turbine engine components, the turbine engine components are obtained by the preformed member formed by fibrous braid, the mold
With the first mould part, the first recess of the first mould part substantially with the first surface of preformed member and its second
For the second partial recess portion substantially with the complementation of the second surface of preformed member, first and second part can be in the mould
Tool is attached to each other when being closed so that at least one injection device that the first and second recess portions limit the wherein described mold allows to note
Resin is penetrated to impregnate the preformed member, wherein at least one injection device has multiple tubular needles, the injection
Needle can be substantially opposite the first surface and institute from the first groove of at least one of described injection needle and the second groove
At least one of second surface surface is stated, and is configured at least penetrate the braided fabric of the preformed member, to allow in institute
It states after mold is closed and is injected while the resin is at least transported to the center of the braided fabric.
Optionally, wherein needle is retractable at least one of the first mould part and the second mould part, and in institute
It states between the extended position of needle relative at least one of first and/or second recess portion in the part to performing member
Movement penetrates fabric and retracted position, wherein the needle is withdrawn from from preform.
Optionally, wherein each in first and second mould part is respectively provided with a needle and second more than first
Multiple needles, a needle more than described first and second are able to relative to first and second surface of the first and second recess portions, with
Just the braiding on the first and second surfaces is at least penetrated.
Optionally, wherein the needle of a needle more than described first is not arranged to the needle in face of second needle.
Optionally, wherein more than described first or each needle of second multiple needle respectively at least one first piece or
Second piece of rigid connection, described first piece or second piece of needle are substantially parallel to each other, and the first or second block is logical
It is parallelly slided to preformed member in the direction for crossing the associated actuators and needle in corresponding first or second mould part.
Optionally, wherein each first or second mould part receives at least two the one or two second piece respectively, it
Be slidably fitted in first or second mould part along different strokes, the stroke of each first or second block
It is arranged to that syringe needle is allowed at least to penetrate the preform corresponding to scheduled thickness respectively relative to the corresponding first or second
The texture area on surface.
The beneficial effects of the invention are as follows：
The present invention proposes a kind of impregnation mold with injection needle, which can penetrate the braiding of preformed member
Object, in order to which resin to be injected into the braiding center of preformed member.
Description of the drawings
Fig. 1-3 is the schematic diagram of longitudinal cross-section, shows the dipping former of first embodiment method for closing according to the present invention
Tool.
Fig. 4-5 is the beginning and end stage for the injecting step that the schematic diagram of longitudinal cross-section is the method for first embodiment.
Embodiment
The preferred embodiments of the present invention will be described in detail below, so that advantages and features of the invention can be easier to
It is readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Fig. 1-Fig. 5 shows the performing member 15 for being used to form turbine engine blade, but it is to be understood that the expression
Do not limit the present invention, and for example, component 16 can be another element made of composite material, such as blower-casting element.
In known manner, mold 18 have the first mould part 30, wherein the first recess portion 32 substantially with preformed member 15 first
Surface 34 is complementary.Mold 18 also have the second mould part 36, wherein the second recess portion 38 substantially with preformed member 15 second
Surface 40 is complementary.The first mould part 30 is top in the figure, and the second mould part 36 is lower part.It should be understood that this
Configuration does not limit the present invention, and the first mould part and the second mould part 30,36 can be arranged vertically or with another
Direction is arranged.As shown in Figure 1, 2, the first and second parts 30,36 can be connected to each other during mold 18 is closed, so as to close
Feud limits the cavity with the substantially comparable size of the component to be obtained.In the cavity, at least one injection device 42,
44 allow to inject resin to impregnate preform 15.Traditionally, this injection device is formed by the conduit for leading to inside grooves
's.There may be multiple injection apparatus with the mold of mold same type.It has been noticed, however, that conventional injection device is not
Allow the fiber homogeneous impregnation of preform 15, this leads to gas hole defect occur in the part of completion.In order to overcome this to lack
Point, the present invention propose at least one injection device 42,44, with multiple end of tubular needle 46,48, for penetrating preformed member
15 braided fabric simultaneously conveys resin wherein.First mould part 30 and the second mould part 36 are respectively provided with injection device 42,
44, with multiple needles 46 and 48.Particularly, a needle 46 more than first and second multiple needle 48 can be respectively from the first recess portions
32 and second recess portion 38 be substantially opposite the first and second surfaces 34,40 of performing member 15 and extend to penetrate braided fabric.
Resin is after the closing of mold 18 by the way that resin transfer to be at least injected into the center of the braided fabric in the braiding
The heart.Advantageously, a needle 46 more than first and the second spininess 48 are arranged in the whole surface towards the first and second surfaces 34,40,
To actually pierce through the entire texture of performing member 15.The size of needle depends on different parameters.First, their length
It is configured to permit them to penetrate the thickness of the fiber of preform to being enough to make fiber integrally impregnated depth.Next, by
In syringe needle be tubulose, so their diameter be require to be large enough to allow resin in the diameter and enough of inside cycle
Compromise between small diameter as a result, to avoid damage prefabricated component any risk.Needle draws between the fiber of preformed member
Entering, for example, it is suitably sized that needle diameter, which is 1 millimeter, it is also to be noted that the end of needle is preferably taper,
In order to which needle permeates between the fiber stock of preform.In the structure shown in Fig. 1,2, as shown, performing member can be with
It is the performing member made of three-dimensional fiber braiding, or the preform being made of at least one layer of fiber braiding layer of insertion piece 28
Part, in both cases, multiple needles 46,48 are configured as only penetrating fabric, it should be appreciated that, this arrangement is simultaneously unlimited
The system present invention.
Multiple needles 46,48 are configured as penetrating the braided fabric of preform 15 and be removed from thereon before resin polymerization.
Although in fact, the present invention improves injection by allowing needle to penetrate the fabric of preformed member 15, but still needing poly- in resin
Multiple needles 46,48 are removed before conjunction and before needle is no longer sewn from fabric.Therefore, the important spy of another of the invention
Sign is, needle can retract the first and second mould parts 30,36, and the first or second being respectively relative in the part
Recess portion 32,38 can be moved into preformed member 15.Multiple needles 46,48 are retracted into the contracting of the first and second mould parts 30 at them
Return moves between setting, that is to say, that they are not from the position that first or second recess portion 32,38 stretches out.In syringe needle in the first He
In the retracted position of second mould part 30,36, before needle passes through fabric, it should be appreciated that needle is not from the part
Specific first or second recess portion 32,38 protrudes, and therefore, does not interfere preformed member 15 in the first mould part and the second mold
Divide the positioning in 30,36.
The sequencing of above example is only for ease of description, can not represent the quality of embodiment.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：It is still
Can be with technical scheme described in the above embodiments is modified, or which part technical characteristic is equally replaced
It changes；And these modifications or replacements, the essence for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution
God and range.
Claims (6)
1. a kind of impregnation mold, for manufacturing the turbine engine components made of composite material, it is characterised in that：The turbine
Engine components are obtained by the preformed member formed by fibrous braid, and the mold has the first mould part, the first mould
Have part first recess substantially with the second recess portion of the first surface of preformed member and its second part substantially in advance
The second surface of molded part is complementary, and first and second part can be attached to each other when the mold is closed so that first
At least one injection device of the wherein described mold is limited with the second recess portion allows injecting resin to impregnate the preformed member,
Described at least one injection device have multiple tubular needles, the injection needle can be from least one in the injection needle
A first groove and the second groove are substantially opposite at least one of the first surface and the second surface surface, and
And be configured at least penetrate the braided fabric of the preformed member, it is after mold closure that the resin is at least defeated to allow
It is injected while being sent to the center of the braided fabric.
2. a kind of impregnation mold according to claim 1, it is characterised in that：Wherein needle be retractable into the first mould part and
At least one of second mould part, and between the extended position of the needle relative in the part first and/
Or second at least one of recess portion to performing member movement penetrate fabric and retracted position, wherein the needle is removed from preform
Go out.
3. a kind of impregnation mold according to claim 1, it is characterised in that：Wherein, first and second mould part
In each be respectively provided with a needle more than first and more than second a needles, a needle is able to relative to institute more than described first and second
First and second the first and second surfaces of recess portion are stated, at least to penetrate the braiding on the first and second surfaces.
4. a kind of impregnation mold according to claim 3, it is characterised in that：Wherein, the needle of a needle more than described first not by
It is arranged to the needle in face of second needle.
5. a kind of impregnation mold according to claim 2, it is characterised in that：Wherein described more than first or second multiple
Each needle of needle is rigidly connected at least one first piece or second piece respectively, described first piece or second piece of needle substantially that
This is parallel, and the first or second block passes through associated actuators in corresponding first or second mould part and needle
It is parallelly slided to preformed member in direction.
6. a kind of impregnation mold according to claim 5, it is characterised in that：Wherein each first or second mould part point
Jie Shou not be at least two the one or two second piece, they are slidably fitted to first or second mould along different strokes
Have in part, the stroke of each first or second block is arranged to that syringe needle is allowed at least to be penetrated respectively corresponding to scheduled thickness
Texture area of the preform relative to corresponding first or second surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810707875.3A CN108749041A (en) | 2018-07-02 | 2018-07-02 | A kind of impregnation mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810707875.3A CN108749041A (en) | 2018-07-02 | 2018-07-02 | A kind of impregnation mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108749041A true CN108749041A (en) | 2018-11-06 |
Family
ID=63975536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810707875.3A Pending CN108749041A (en) | 2018-07-02 | 2018-07-02 | A kind of impregnation mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108749041A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180162076A1 (en) * | 2016-12-14 | 2018-06-14 | Safran Aircraft Engines | Impregnation mould having needles for producing a part from a woven preform |
| CN208930772U (en) * | 2018-07-02 | 2019-06-04 | 江阴澄云机械有限公司 | A kind of impregnation mold |
-
2018
- 2018-07-02 CN CN201810707875.3A patent/CN108749041A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180162076A1 (en) * | 2016-12-14 | 2018-06-14 | Safran Aircraft Engines | Impregnation mould having needles for producing a part from a woven preform |
| CN208930772U (en) * | 2018-07-02 | 2019-06-04 | 江阴澄云机械有限公司 | A kind of impregnation mold |
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Application publication date: 20181106 |