CN109591336A - A kind of preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts - Google Patents
A kind of preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts Download PDFInfo
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- CN109591336A CN109591336A CN201811567289.XA CN201811567289A CN109591336A CN 109591336 A CN109591336 A CN 109591336A CN 201811567289 A CN201811567289 A CN 201811567289A CN 109591336 A CN109591336 A CN 109591336A
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- carbon fiber
- thermoplasticity carbon
- felt material
- automobile exterior
- exterior trimming
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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
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/82—Forcing wires, nets or the like partially or completely into the surface of an article, e.g. by cutting and pressing
-
- 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
- B29C70/12—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of short length, e.g. in the form of a mat
-
- 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
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Abstract
The present invention provides a kind of preparation methods based on thermoplasticity carbon fibre composite automobile exterior trimming parts, including step, prepare thermoplasticity carbon fiber composite felt material: by carbon fiber, thermoplastic fibre and interface cohesion material, which are uniformly mixed, forms a mixture, mixture is placed in opener and carries out shredding using opener, combing networking is carried out to the mixture after shredding using carding machine and generates monolayer net, by lapping machine by multiple monolayer net stack pavings, generate Multilayer Network, then needle thorn processing is carried out to Multilayer Network by acupuncture apparatus, generate thermoplasticity carbon fiber composite felt material, precompressed and heat treatment are carried out to thermoplasticity carbon fiber composite felt material, then compression molding operation is carried out, the semi-finished product of automobile exterior trimming parts after compression molding are taken out in demoulding, finally the semi-finished product of automobile exterior trimming parts are post-processed.Using the preparation method in the present invention, the preparation quality and production efficiency of automobile exterior trimming parts can be improved, guarantee the bonding strength between adjacent automobile exterior trimming parts.
Description
Technical field
The present invention relates to automobile exterior trimming parts fields, more particularly to one kind to be based on thermoplasticity carbon fibre composite automobile exterior
The preparation method of part.
Background technique
With the rapid development of auto industry, lightweight has become the trend of development of automobile, automotive light weight technology be exactly
Under the premise of the intensity and security performance that guarantee automobile, the kerb weight of automobile is reduced as far as possible, to improve the power of automobile
Property, fuel consumption is reduced, exhaust pollution is reduced.
Currently, thermoplastic carbon fibre composite is a kind of selection of automobile lightweight.As country is for automobile section
Can emission reduction index increasingly raising, thermoplastic carbon fibre composite automobile application also oneself become current Automobile Enterprises research
Important directions.The structure of many auto parts and components is complex, more difficult with the connection of surrounding components, especially automobile
Exterior trimming parts, existing automobile exterior trimming parts are prepared frequently with thermoplasticity carbon fibre composite, and existing thermoplasticity carbon fiber is multiple
The preparation method of condensation material has the disadvantage in that (1) prepares automobile exterior trimming parts using thermoplastic carbon fibre composite again when, due to
There is no interface cohesion materials between thermoplastic fibre and carbon fiber, and binding force is lower between thermoplastic fibre and carbon fiber, nothing
Method guarantees the structural strength of automobile exterior trimming parts after preparation；(2) connector between automobile exterior trimming parts is frequently in automobile exterior trimming parts
The mode of surface injection molding forms, and uses above-mentioned molding mode, not can guarantee the company between connector and automobile exterior trimming parts ontology
Intensity is connect, connector is easy to happen fracture in assembling process between adjacent exterior trimming parts；(3) automobile exterior trimming parts preparation efficiency is low, raw
Produce at high cost, while product quality not can guarantee.
Summary of the invention
In view of the foregoing, the present invention provides a kind of preparations based on thermoplasticity carbon fibre composite automobile exterior trimming parts
Method, the automobile exterior trimming parts after guaranteeing preparation have preferable structural strength.
To achieve the above object, the invention discloses a kind of systems based on thermoplasticity carbon fibre composite automobile exterior trimming parts
Preparation Method, comprising the following steps:
It prepares thermoplasticity carbon fiber composite felt material: carbon fiber, thermoplastic fibre and interface cohesion material is uniformly mixed shape
At a mixture, the mixture is placed in opener and carries out shredding using opener, using carding machine to shredding after
Mixture carry out combing networking, generate the monolayer net of even density, by lapping machine by multiple monolayer net stack pavings,
Multilayer Network is generated, needle thorn processing, the thermoplastic for generating thickness uniformly and being interweaved are carried out to the Multilayer Network by acupuncture apparatus
Property carbon fiber composite felt material；
Precompressed processing is carried out to the thermoplasticity carbon fiber composite felt material, so that thermoplasticity carbon fiber composite felt material after precompressed
Thickness reduction be original thickness 1/2 to 3/4, then the thermoplasticity carbon fiber composite felt material is heated, so that institute
The softening of thermoplasticity carbon fiber composite felt material is stated, heating temperature is 180 DEG C -260 DEG C, heating time 20s-60s；
It carries out compression molding operation: compression molding device and moulding being provided, the moulding is placed in the molding
On cover half in molding equipment, the moulding is toasted, so that the adhesive surface of the moulding is baked to molten condition,
Then the thermoplasticity carbon fiber composite felt material after softening is layed on the cover half, so that the thermoplasticity carbon fiber composite felt
The lower surface of material fits in the adhesive surface, drives the compression molding device to the thermoplasticity carbon fiber composite felt material and institute
It states moulding to be molded, preparation generates automobile exterior trimming parts semi-finished product；
The semi-finished product of automobile exterior trimming parts after compression molding are taken out in demoulding；
The automobile exterior trimming parts semi-finished product are post-processed, automobile exterior trimming parts finished product is obtained；
Wherein, the Multilayer Network is successively carried out in needle thorn procedure of processing, including pre-needling and secondary needle pierce, pre-needling is close
Degree is 60-65 needle/cm3, for depth of needling in 50-80mm, secondary needling density is 50-55 needle/cm3, secondary depth of needling is in 20-
50mm。
The beneficial effects of the present invention are:
(1) carbon fiber, thermoplastic fibre and interface cohesion material are uniformly mixed in thermoplasticity carbon fiber composite felt material, simultaneously
The degree of adhesion after being pressed and molded between carbon fiber and thermoplastic fibre can be improved by adding interface cohesion material, to guarantee vapour
The structural strength of vehicle exterior trimming parts entirety.
(2) by the way that moulding adhesive surface is baked to molten condition, then using compression molding device realize moulding and
Bonding between thermoplasticity carbon fiber composite felt material, molding formed needed for automobile exterior trimming parts, and in the prior art in outside automobile
The injection molding of gadget body surfaces generates moulding (connector) and compares, and simplifies preparation section, improves production efficiency, guarantee simultaneously
Bonding strength with higher between moulding and thermoplasticity carbon fiber composite felt material.
A kind of further improvement of the preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts of the present invention exists
In further including contact heating pressure apparatus, the contact heating pressure apparatus includes upper heating plate, lower heating plate and use
In the hydraulic cylinder for driving the upper heating plate and the lower heating plate relative motion, in the thermoplasticity carbon fiber composite felt material
Carry out in precompressed processing step, thermoplasticity carbon fiber composite felt material is placed in the lower heating plate, is connect by described
Touch heated pressing device carries out precompressed and heat treatment to the thermoplasticity carbon fiber composite felt material.Thermoplasticity carbon fiber is answered
Air discharge reserved in felt material is closed, reserved air, which is pressurized, when avoiding being pressed and molded is discharged and automobile exterior trimming parts surface is caused to occur
Pit leads to waste product.
A kind of further improvement of the preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts of the present invention
It is, is layed on the cover half in by the thermoplasticity carbon fiber composite felt material after softening, so that the thermoplasticity carbon fiber is multiple
The lower surface for closing felt material, which fits in, to be further comprised the steps of: in the adhesive surface step in the upper of the thermoplasticity carbon fiber composite felt material
Surface is laid with topcoat, then drives the compression molding device to the thermoplasticity carbon fiber composite felt for being equipped with the topcoat
Material is molded, and preparation generates automobile exterior trimming parts semi-finished product.Pass through the upper surface paved surface in thermoplasticity carbon fiber composite felt material
Layer is adornd, to improve the aesthetics on automobile exterior trimming parts surface.
A kind of further improvement of the preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts of the present invention exists
In the dynamic model in the compression molding device includes hold-down mechanism, and the hold-down mechanism includes in alignment with the cover half side
Pressing plate and for driving the pressing plate to be pressed against the cylinder of the cover half side, the cylinder is installed on the compression molding and sets
On standby body, mould is carried out to the thermoplasticity carbon fiber composite felt material and the moulding in the driving compression molding device
It presses in step, drives the pressing plate to compress the thermoplasticity carbon fiber composite felt material being laid on the solid plate by the cylinder
Side.The side of thermoplasticity carbon fiber composite felt material is molded using pressing plate realization, guarantees automobile exterior trimming parts side
Forming Quality.
A kind of further improvement of the preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts of the present invention exists
In, in carrying out in compression molding job step, molding pressure 1MPa-1.8MPa, dwell time 30s-60s.Guarantee molding
The Forming Quality of automobile exterior trimming parts afterwards.
A kind of further improvement of the preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts of the present invention exists
In before driving the compression molding device to carry out molding process to the thermoplasticity carbon fiber composite felt material and the moulding
Further include step, smears release agent on the dynamic model in Yu Suoshu compression molding device.Convenient for demoulding, the system of automobile exterior trimming parts is improved
Standby efficiency.
A kind of further improvement of the preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts of the present invention exists
In the mixture includes 20-50 parts of carbon fiber, 40-70 parts of thermoplastic fibre and 10-15 parts of interface cohesion material
Material.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts of the present invention.
Specific embodiment
For the benefit of to understanding of the invention, it is illustrated with reference to the accompanying drawings and embodiments.
Refering to fig. 1 it is found that the invention discloses a kind of preparations based on thermoplasticity carbon fibre composite automobile exterior trimming parts
Method, comprising the following steps:
Step 101: preparation thermoplasticity carbon fiber composite felt material: carbon fiber, thermoplastic fibre and interface cohesion material being mixed
Conjunction is formed uniformly a mixture, and mixture is placed in opener and carries out shredding using opener, split using carding machine
Mixture after pine carries out combing networking, generates the monolayer net of even density, by lapping machine by multiple monolayer net stack pavings,
Multilayer Network is generated, needle thorn processing, the thermoplasticity carbon for generating thickness uniformly and being interweaved are carried out to Multilayer Network by acupuncture apparatus
Fiber composite felt material；
Step 102: precompressed processing being carried out to thermoplasticity carbon fiber composite felt material, so that thermoplasticity carbon fiber is compound after precompressed
The thickness reduction of felt material is the 1/2 to 3/4 of original thickness, is then heated to thermoplasticity carbon fiber composite felt material, so that hot
The softening of plasticity carbon fiber composite felt material, heating temperature are 180 DEG C -260 DEG C, heating time 20s-60s；
Step 103: carrying out compression molding operation: compression molding device and moulding being provided, moulding is placed in molding
On cover half in molding equipment, moulding is toasted, so that the adhesive surface of moulding is baked to molten condition, it then will be soft
Thermoplasticity carbon fiber composite felt material after change is layed on cover half, so that the lower surface of thermoplasticity carbon fiber composite felt material fits in
Adhesive surface, driving compression molding device are molded thermoplasticity carbon fiber composite felt material and moulding, and preparation generates outside automobile
Gadget semi-finished product；
Step 104: the semi-finished product of automobile exterior trimming parts after compression molding are taken out in demoulding；
Step 105: automobile exterior trimming parts semi-finished product being post-processed, automobile exterior trimming parts finished product is obtained；
Wherein, Multilayer Network is successively carried out in needle thorn procedure of processing, including pre-needling and secondary needle thorn, pre-needling density are
60-65 needle/cm3, for depth of needling in 50-80mm, secondary needling density is 50-55 needle/cm3, secondary depth of needling is in 20-50mm.
In the present embodiment, (1) to separate simultaneously between carbon fiber, thermoplastic fibre and interface cohesion material by opener
It is further sufficiently mixed, the mixed material after shredding is combed through carding machine, form carbon fiber, thermoplastic fibre and interface cohesion
The equally distributed monolayer net of density of material, acupuncture apparatus carries out needle thorn processing to Multilayer Network, so that the carbon in different layers monolayer net
Fiber and thermoplastic fibre are interweaved entanglement, when effect and carbon fiber and thermoplastic fibre upper and lower displacement due to frictional force
Certain extruding is generated, so that Multilayer Network is compressed, being formed has the thermoplasticity carbon fiber of certain thickness and certain strength compound
Felt material, while there is preferable stability and elasticity；(2) mixture is fed in acupuncture apparatus after shredding, combing and lapping, warp
Clot after needle thorn entanglement is reinforced, then the fibre web debatching through pre-needling feed in acupuncture apparatus again, carry out secondary needle thorn；(3)
The purpose for carrying out precompressed to thermoplasticity carbon fiber composite felt material is, air remaining in thermoplasticity carbon fiber composite felt material is arranged
Out, it avoids in heating process, the pattern on damage thermoplasticity carbon fiber composite felt material surface is gone out in air heats expansion, influences the later period
The Forming Quality on automobile exterior trimming parts surface is the purpose of the processing of thermoplasticity carbon fiber composite felt material heating, softens thermoplastic
Property carbon fiber composite felt material, be convenient for subsequent compression molding process；(4) before being molded, to moulding carry out baking and it is right
The purpose that thermoplasticity carbon fiber composite felt material is softened is, guarantees thermoplasticity carbon fiber composite felt material and moulding when molding
Between be firmly bonded, improve bonding strength between the two, then avoid being molded in assembling process between adjacent automobile exterior trimming parts
The connecting portion of part and automobile exterior trimming parts ontology is broken, and generates injection molding with being molded in the prior art on exterior trimming parts surface
Part is compared, and preparation section is simple, the bonding strength between thermoplasticity carbon fiber composite felt material (exterior trimming parts) and moulding is higher；
(5) without carrying out pre-preg operation to thermoplasticity carbon fiber composite felt material, preparation section is simplified, automobile exterior trimming parts are improved
Preparation efficiency；(6) weight of monolayer net is 20g-50g, and the weight of Multilayer Network is 300g/m2-500g/m2, moulding is specially to press
Together in the connecting elements on thermoplasticity carbon fiber composite felt material surface, convenient for the company between adjacent automobile exterior trimming parts in actual use
It connects；(7) carding machine selects double Cylinder Carding machines or double cylinder and double doffer carding machine, carries out baking work to moulding using electric heater
Industry.
It further, further include contact heating pressure apparatus, contact heating pressure apparatus includes upper heating plate, adds down
Hot plate and hydraulic cylinder for driving upper heating plate and lower heating plate relative motion, in thermoplasticity carbon fiber composite felt material into
Row thermoplasticity carbon fiber composite felt material is placed in lower heating plate, passes through contact heating pressure in precompressed processing step
Power device carries out precompressed and heat treatment to thermoplasticity carbon fiber composite felt material.In the present embodiment, pass through contact heating pressure
Upper heating plate and lower heating plate in device respectively to thermoplasticity carbon fiber composite felt material upper and lower surfaces carry out precompressed and
Heat treatment for air remaining in thermoplasticity carbon fiber composite felt material to be discharged, and guarantees that thermoplasticity carbon fiber is compound
Felt material stress and is heated evenly everywhere.
Further, it is layed on cover half in by the thermoplasticity carbon fiber composite felt material after softening, so that thermoplasticity carbon fiber
The lower surface of dimension composite felt material, which fits in, to be further comprised the steps of: in adhesive surface step in the upper surface of thermoplasticity carbon fiber composite felt material
It is laid with topcoat, then compression molding device is driven to be molded the thermoplasticity carbon fiber composite felt material for being equipped with topcoat,
Preparation generates automobile exterior trimming parts semi-finished product.In the present embodiment, topcoat is laid on the thermoplasticity carbon fiber composite felt after softening
Material surface makes topcoat in high resiliency elastomeric state, convenient for being molded into using the temperature on thermoplasticity carbon fiber composite felt material surface
During type, topcoat is bonded completely with thermoplasticity carbon fiber composite felt material surface, is guaranteed the quality of compression molding, is then passed through
It is laid with topcoat, improves the decorative effect of automobile exterior trimming parts entirety after compression molding.
Further, the dynamic model in compression molding device includes hold-down mechanism, and hold-down mechanism includes in alignment with cover half side
Pressing plate and for driving pressing plate to be pressed against the cylinder of cover half side, cylinder is installed on the body of compression molding device, in
Compression molding device is driven to carry out driving pressing plate by cylinder in molding process to thermoplasticity carbon fiber composite felt material and moulding
Compress the side for the thermoplasticity carbon fiber composite felt material being laid on solid plate.In the present embodiment, realized by pressing plate to molding
The side of thermoplasticity carbon fiber composite felt material is pressed in the process, so guarantee compression molding after automobile exterior trimming parts side at
Type quality avoids automobile exterior trimming parts side from warping.
Further, in carrying out in compression molding job step, molding pressure 1MPa-1.8MPa, the dwell time is
30s-60s.In the present embodiment, using above-mentioned molding parameter, it is ensured that the automobile exterior trimming parts after compression molding have preferable
Structural strength and Forming Quality.
Further, molding process is carried out to thermoplasticity carbon fiber composite felt material and moulding in driving compression molding device
Before further include step, smear release agent on the dynamic model in compression molding device.It is de- by being smeared on dynamic model in the present embodiment
Mould agent, convenient for demoulding, the automobile exterior trimming parts after avoiding compression molding are bonded on dynamic model.Further, it is also smeared on cover half
There is release agent.
Further, it further comprises the steps of: before carrying out precompressed processing step to thermoplasticity carbon fiber composite felt material by thermoplastic
Property carbon fiber composite felt material is impregnated in dipping solution 10min-30min, so that the dipping solution uniformly penetrating is in thermoplasticity carbon
Fiber composite felt material, dipping solution include polyurethane resin, dimethylformamide, polyester polyol, polyether polyol, macromolecular
Organosiloxane and povidon iodine；By the way that thermoplasticity carbon fiber composite felt material is impregnated in dipping solution, (1)
It further increases the bonding strength between carbon fiber and thermoplastic fibre；(2) guarantee that exterior trimming parts after molding has preferably
Wearability and soil resistance.Specifically, including 80-90 part polyurethane resin, 15-20 parts of dimethylformamides, 20-30 parts gather
Ester polyol, 10-20 parts of polyether polyol, 5-10 parts of macromolecular organosiloxane and 3-5 parts of polyvinylpyrrolidone
Iodine.
In the present invention, mixture includes 20-50 parts of carbon fiber, 40-70 parts of thermoplastic fibre and 10-15 parts of boundary
Face bond material.In the present embodiment, by using above-mentioned share match, it is ensured that after compression molding automobile exterior trimming parts have compared with
High structural strength.
In the present invention, viscose fibre is can be selected in interface cohesion material, and specific is polypropylene fibre, composite fibre or the tree of low melting point
Rouge；Thermoplastic fibre selects one of polypropylene fibre, polyester fiber and Fypro or a variety of.
In the present invention, compared with traditional carbon fibres composite felt material, the improving uniformity of thermoplasticity carbon fiber composite felt material
10%, intensity improves 15%, and vertically and horizontally specific thrust reduces 15%, effectively increases the matter of thermoplasticity carbon fiber composite felt material
Amount and performance then guarantee the Forming Quality of automobile exterior trimming parts.It is compound for the carbon fiber of matrix with conventionally employed thermosetting resin
The preparation method of material is compared, the mould in the present invention in the preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts
Pressure pressure and molding temperature are lower, reduce production cost.
In the present invention, the effect of moulding is to realize the connection between adjacent automobile exterior trimming parts in actual use, plays company
The effect of fitting, common moulding are snap features.
Signified automobile exterior trimming parts ontology corresponds to the structure after the molding of thermoplastic carbon fiber composite felt material in the present invention.
A kind of beneficial effect of the preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts of the present invention includes:
1. binding force between thermoplastic fibre and carbon fiber can be improved, then guarantee by increasing interface cohesion material
The structural strength of automobile exterior trimming parts entirety after compression molding.
2. using die press technology for forming between thermoplasticity carbon fiber composite felt material and moulding, moulding and vapour is effectively ensured
Bonding strength between vehicle exterior trimming parts ontology, moulding is connected with automobile exterior trimming parts ontology when adjacent automobile exterior trimming parts being avoided to assemble
Position is broken, and extends the service life of automobile exterior trimming parts.
3. ensure that the quality of automobile exterior trimming parts compression molding, preparation section is simplified, production cost is reduced.
The above is only presently preferred embodiments of the present invention, not do limitation in any form to the present invention, although this
Invention has been disclosed in a preferred embodiment above, and however, it is not intended to limit the invention, any person skilled in the art,
In the range of not departing from technical solution of the present invention, when the technology contents using the disclosure above make a little change or are modified to
With the equivalent embodiment of variation, but anything that does not depart from the technical scheme of the invention content, according to the technical essence of the invention to
Any simple modification, equivalent change and modification made by upper embodiment, all of which are still within the scope of the technical scheme of the invention.
It should be noted that this specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to cooperate
The bright revealed content of book is not intended to limit the invention enforceable limit so that those skilled in the art understands and reads
Fixed condition, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size, not
It influences still fall in disclosed technology contents under the effect of present invention can be generated and the purpose that can reach
In the range of capable of covering.
Claims (7)
1. a kind of preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts, which is characterized in that including following step
It is rapid:
Preparation thermoplasticity carbon fiber composite felt material: carbon fiber, thermoplastic fibre and interface cohesion material are uniformly mixed and form one
The mixture is placed in opener and carries out shredding using opener, using carding machine to mixed after shredding by mixture
It closes object and carries out combing networking, generate the monolayer net of even density, by lapping machine by multiple monolayer net stack pavings, generate
Multilayer Network carries out needle thorn processing, the thermoplasticity carbon for generating thickness uniformly and being interweaved to the Multilayer Network by acupuncture apparatus
Fiber composite felt material；
To the thermoplasticity carbon fiber composite felt material carry out precompressed processing so that after precompressed thermoplasticity carbon fiber composite felt material thickness
The 1/2 to 3/4 of the original thickness of boil down to is spent, then the thermoplasticity carbon fiber composite felt material is heated, so that the heat
The softening of plasticity carbon fiber composite felt material, heating temperature are 180 DEG C -260 DEG C, heating time 20s-60s；
It carries out compression molding operation: compression molding device and moulding being provided, the moulding is placed in the compression molding
On cover half in equipment, the moulding is toasted, so that the adhesive surface of the moulding is baked to molten condition, then
Thermoplasticity carbon fiber composite felt material after softening is layed on the cover half, so that the thermoplasticity carbon fiber composite felt material
Lower surface fits in the adhesive surface, drives the compression molding device to the thermoplasticity carbon fiber composite felt material and the note
Plastic is molded, and preparation generates automobile exterior trimming parts semi-finished product；
The semi-finished product of automobile exterior trimming parts after compression molding are taken out in demoulding；
The automobile exterior trimming parts semi-finished product are post-processed, automobile exterior trimming parts finished product is obtained；
Wherein, the Multilayer Network is successively carried out in needle thorn procedure of processing, including pre-needling and secondary needle thorn, pre-needling density are
60-65 needle/cm3, for depth of needling in 50-80mm, secondary needling density is 50-55 needle/cm3, secondary depth of needling is in 20-50mm.
2. a kind of preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts according to claim 1,
It is characterized in that, further includes contact heating pressure apparatus, the contact heating pressure apparatus includes upper heating plate, lower heating plate
And the hydraulic cylinder for driving the upper heating plate and the lower heating plate relative motion, in multiple to the thermoplasticity carbon fiber
It closes felt material carry out in precompressed processing step, thermoplasticity carbon fiber composite felt material is placed in the lower heating plate, is passed through
The contact heating pressure apparatus carries out precompressed and heat treatment to the thermoplasticity carbon fiber composite felt material.
3. a kind of preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts according to claim 1,
It is characterized in that, is layed on the cover half in by the thermoplasticity carbon fiber composite felt material after softening, so that the thermoplasticity carbon fiber
The lower surface of dimension composite felt material, which fits in the adhesive surface step, to be further comprised the steps of: in the thermoplasticity carbon fiber composite felt material
Upper surface be laid with topcoat, then drive the compression molding device multiple to the thermoplasticity carbon fiber for being equipped with the topcoat
It closes felt material to be molded, preparation generates automobile exterior trimming parts semi-finished product.
4. a kind of preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts according to claim 1,
Be characterized in that: the dynamic model in the compression molding device includes hold-down mechanism, and the hold-down mechanism includes in alignment with the cover half
The pressing plate of side and for driving the pressing plate to be pressed against the cylinder of the cover half side, the cylinder is installed on the molding
On the body of molding equipment, in the driving compression molding device to the thermoplasticity carbon fiber composite felt material and the moulding
It carries out in molding process, drives the pressing plate to compress the thermoplasticity carbon fiber being laid on the solid plate by the cylinder multiple
Close the side of felt material.
5. a kind of preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts according to claim 1,
It is characterized in that: in carrying out in compression molding job step, molding pressure 1MPa-1.8MPa, dwell time 30s-60s.
6. a kind of preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts according to claim 1,
It is characterized in that: the thermoplasticity carbon fiber composite felt material and the moulding being molded in the driving compression molding device
Further include step before step, smears release agent on the dynamic model in Yu Suoshu compression molding device.
7. a kind of preparation method based on thermoplasticity carbon fibre composite automobile exterior trimming parts according to claim 1,
Be characterized in that: the mixture includes 20-50 parts of carbon fiber, 40-70 parts of thermoplastic fibre and 10-15 parts of interface knot
Condensation material.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113510946A (en) * | 2021-04-20 | 2021-10-19 | 济南大学 | Carbon fiber composite material molding press |
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| CN102689487A (en) * | 2012-06-18 | 2012-09-26 | 长春博超汽车零部件股份有限公司 | Preparing method for automobile interior trim plate |
| CN104603351A (en) * | 2012-09-06 | 2015-05-06 | 三菱丽阳株式会社 | Carbon fiber bundle for resin reinforcement purposes and method for producing same, and carbon-fiber-reinforced thermoplastic resin composition and molded product thereof |
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