CN110509573A - The forming method of bumper - Google Patents
The forming method of bumper Download PDFInfo
- Publication number
- CN110509573A CN110509573A CN201810495875.1A CN201810495875A CN110509573A CN 110509573 A CN110509573 A CN 110509573A CN 201810495875 A CN201810495875 A CN 201810495875A CN 110509573 A CN110509573 A CN 110509573A
- Authority
- CN
- China
- Prior art keywords
- release agent
- gel coat
- bumper
- prepreg
- gel
- 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
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
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
- B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
- B29C37/0032—In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied upon the mould surface before introducing the moulding compound, e.g. applying a gelcoat
-
- 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
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0067—Using separating agents during or after moulding; Applying separating agents on preforms or articles, e.g. to prevent sticking to each other
-
- 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
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2063/00—Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
-
- 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
- B29L2031/3044—Bumpers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
- Laminated Bodies (AREA)
Abstract
The invention belongs to mold field shaping techniques, are related to a kind of forming method of bumper, comprising the following steps: coating release agent: applying gel coat: after release agent solidification, applying gel coat on the surface of release agent and form gel coating resin；It spreads prepreg: after application gel coat immediately or after gel coat surface drying, carrying out the laying of multilayer prepreg on the surface of gel coating resin；Vacuum solidification: the mold of prepreg is completed with bag vacuum sealing, be heating and curing molding；Demoulding: it is to be solidified completely after, demoulding, bumper is made.The forming method of the bumper between prepreg and release agent by applying gel coat, because gel coat will not generate bubble, after gel coat is applied on release agent, one layer of smooth film can be formed in the contact surface of gel coat and release agent, after prepreg curing molding, it can be removed between gel coating resin and release agent, the smooth outer surface of bumper obtained is smooth, with good glossiness, to keep the outer surface of bumper more attractive.
Description
Technical field
The invention belongs to mold field shaping techniques, more particularly to a kind of forming method of bumper.
Background technique
Bumper is the important component of automobile, it is to absorb and slow down foreign impacts power and protection body of a motor car front and rear part
Safety device.It not only makes automobile beautiful and generous, moreover, can protect vehicle body, wing when automobile and other vehicles collide
The components such as plate, radiator, hood and lamps and lanterns, while the personal safety of passenger can be protected.The structure of bumper designs,
The safety of driver and passenger is not only influenced, but also influences the durability that product uses.As the relationship of automobile and the mankind are more next
Closer, whole design also from single protection automobile, turns to hommization and individualized development, the function and concept of bumper
Coordinate to body of a motor car aesthetics, Integral decoration, reduce air resistance coefficient and improve driving maneuver etc. development.
It is made currently, bumper generallys use injection molding method, using bumper made of this method, there are surfaces
It is easily cracked or the defects of rough surface, influences the appearance of bumper, be not easy to carry out subsequent processing.
Summary of the invention
The technical problems to be solved by the present invention are: there is technical issues that for existing bumper, mention
For a kind of forming method of bumper.
In order to solve the above technical problems, the embodiment of the invention provides a kind of forming method of bumper, including following step
It is rapid:
Coating release agent: in the surface coating release agent of mold, release agent solidification；
Apply gel coat: after release agent solidification, applying gel coat on the surface of release agent and form gel coating resin；
It spreads prepreg: after application gel coat immediately or after gel coat surface drying, carrying out multilayer prepreg on the surface of gel coating resin
Laying；
Vacuum solidification: the mold of prepreg is completed with bag vacuum sealing, be heating and curing molding；
Demoulding: it is to be solidified completely after, demoulding, bumper is made.
The forming method of bumper according to an embodiment of the present invention applies gel coat, because of glue between prepreg and release agent
Clothing will not generate bubble, after gel coat is applied on release agent, can the contact surface of gel coat and release agent formed one layer it is smooth
Film keeps the contact surface of gel coat and release agent smooth, can be complete between gel coating resin and release agent after prepreg curing molding
U.S. removing, the smooth outer surface of bumper obtained is smooth, has good glossiness, to keep the outer surface of bumper more beautiful
It sees.
Optionally, the release agent is fluorine system releasing agent, wax system release agent or silicon systems release agent.
Optionally, it is the surface glue spraying in release agent that the surface in release agent, which applies the method that gel coat forms gel coating resin,
Clothing forms gel coating resin, alternatively, the surface coating clothing in release agent forms gel coating resin.
Optionally, the gel coat is thermosetting property gel coat, and the thermosetting property gel coat is epoxy gel coat, phenolic aldehyde gel coat, polyurethane
Gel coat or vinyl gel coat.
Optionally, the gel coating resin with a thickness of 0.3-0.5mm.
Optionally, the resin in the prepreg is modified imidazole-epoxy-resin systems.
It optionally, further include paving auxiliary material after prepreg overlay, the paving auxiliary material is to spread demoulding on the surface of the prepreg
Cloth, then airfelt is spread on the surface of the release cloth, with bag vacuum sealed mold, be heating and curing molding.
Optionally, the release cloth is that glassine paper, mylar, polyvinyl chloride film, polyethylene film, polyimides are thin
Film or polytetrafluoroethylene film.
Optionally, after the mold for completing auxiliary material is is sealed by the method for the molding that is heating and curing with bag vacuum,
In 90 DEG C of heat preservation 55-65min, then in 115 DEG C of heat preservation 85-95min.
Optionally, further include scribing line trimming after demoulding, bumper is made after repairing polishing spray.
Specific embodiment
In order to which the technical problems, technical solutions and beneficial effects solved by the present invention is more clearly understood, below in conjunction with
Embodiment, the present invention is further described in detail.It should be appreciated that specific embodiment described herein is only used to solve
The present invention is released, is not intended to limit the present invention.
The forming method for the bumper that one embodiment of the invention provides, comprising the following steps:
Coating release agent: in the surface coating release agent of mold, release agent solidification；
Apply gel coat: after release agent solidification, applying gel coat on the surface of release agent and form gel coating resin；
It spreads prepreg: after application gel coat immediately or after gel coat surface drying, carrying out multilayer prepreg on the surface of gel coating resin
Laying；
Vacuum solidification: the mold of prepreg is completed with bag vacuum sealing, be heating and curing molding；
Demoulding: it is to be solidified completely after, demoulding, bumper is made.
The forming method of the bumper between prepreg and release agent by applying gel coat, because gel coat will not generate gas
Bubble after gel coat is applied on release agent, can form one layer of smooth film in the contact surface of gel coat and release agent, make gel coat and take off
The contact surface of mould agent is smooth, after prepreg curing molding, perfect can remove between gel coating resin and release agent, obtained
The smooth outer surface of bumper is smooth, has good glossiness, to keep the outer surface of bumper more attractive.
It is first with tool that the removing surface of mold is clean during applying release agent, guarantee the smooth nothing in the surface of mold
Then pollutant applies mould agent on the surface of mold, release agent facilitates the bumper being finally made and is completely exfoliated with mold, no
Leading to the problem of adhesion etc. influences the appearance of bumper outer surface.
In one embodiment, the release agent is fluorine system releasing agent, wax system release agent or silicon systems release agent.Fluorine system releasing agent
It can be polytetrafluoroethylene (PTFE), fluororesin powder or fluorine resin coating etc., fluorine system releasing agent is optimal release agent, it has isolation
The advantages that performance is good and small to the pollution of mold.Wax system release agent can be industrial vaseline, paraffin, sulfonated vegetable oil or print
Contaminate oil etc., it have many advantages, such as it is cheap, be deposited with that performance is good and easy mold release.Silicon systems release agent refers to silicone compounds, silicon
Oil or silicone resin, are a kind of preferable release agent of isolation, easy mold release small to mold fouling.Silicon systems release agent need to only apply one
It is secondary, 5-10 demoulding can be carried out.Silicon systems release agent can be metlyl branching silicone oil, methyl-silicone oil, emulsify methyl-silicone oil, is hydrogeneous
Methyl-silicone oil, organic siliconresin or silicon rubber etc..Silicon systems release agent is preferably dimethicone, with excellent high-low temperature resistant
Property, translucency, electrical property, hydrophobicity, moisture resistance and chemical stability.
During applying gel coat, after release agent solidification, then applies gel coat on the surface of release agent and form gel coating resin.Institute
Stating in the method that the surface of release agent applies gel coat formation gel coating resin is the surface glue spraying clothing formation gel coating resin in release agent, or
Person forms gel coating resin in the surface coating clothing of release agent.Gel coat have good mechanical performance, high bright property, chemical resistance and
Flexibility, gel coat, which is applied on bumper, can make the outer surface of bumper form one layer of smooth film, can increase bumper
Glossiness improves the presentation quality of bumper.
Before applying gel coat, it need to guarantee that the surface of mold does not have moisture, otherwise will lead to cannot between gel coat and release agent
It is completely exfoliated, influences the surface quality of gel coat.During applying gel coat, gel coat is mixed slowly and is avoided that and is mixed into bubble；
The temperature of gel coat and mold is held within the scope of 16-30 DEG C, and the temperature of mold is 2-3 DEG C higher than the temperature of gel coat, such energy
Make the gel coat surface more gloss after solidifying.When applying gel coat, uniformly apply very thin one layer every time, can apply repeatedly to be formed
The thickness of final gel coat, it is every when applying one layer to prevent generating bubble in gel coat, it need to be applied again after the abundant gel of preceding layer gel coat
Add next layer, to prevent the phenomenon that being layered between gel coat.Gel coat has good mechanical performance, high bright property, chemically-resistant
Gel coat, is applied on bumper the luster performance that can effectively improve the outer surface of bumper by property and flexibility.
In one embodiment, the gel coat can be thermosetting cement clothing, and the thermosetting property gel coat is epoxy gel coat, phenol glue
Clothing, polyurethane gel coat or vinyl gel coat.Epoxy gel coat has very strong cohesive force, and the binding force between prepreg is strong,
Cure shrinkage is small, so that the dimensional stability of manufactured bumper is high, meanwhile, electrical insulating property, chemical corrosion resistance and stability
Might as well, enable manufactured bumper long-term preservation.
During spreading prepreg, the laying that can carry out prepreg after gel coat immediately is applied, alternatively, to gel coat table
The laying of prepreg is carried out after dry again.Surface drying refers to that the surface of gel coat just starts to solidify, and also has certain viscosity.
It in one embodiment, further include paving auxiliary material after prepreg overlay, the paving auxiliary material is on the surface of the prepreg
Release cloth is spread, then spreads airfelt on the surface of the release cloth, with bag vacuum sealed mold, be heating and curing molding.In
It is laid with release cloth between the surface and vacuum bag of prepreg, in demoulding, can make to be completely exfoliated between prepreg and vacuum bag, and
The appearance of prepreg is not influenced.
After having spread auxiliary material, flow-guiding screen is set around mold, then is sealed with vacuum bag, be heating and curing molding.Flow-guiding screen
The residual air in vacuum bag can be excluded, facilitates the resin flowing in prepreg, makes the better quality of bumper obtained.Directly
It connects prepreg overlay on the surface of release agent, in vacuum diversion, the poor fluidity of the resin in prepreg makes in prepreg
The bubble that generates of resin in can remain a small amount of air so that the surface irregularity of prepreg, by prepreg and demoulding
One layer of gel coating resin is added between agent, can overcome the disadvantages that the defect of the surface irregularity of prepreg by gel coating resin, moreover, finally to make
At bumper smooth outer surface it is smooth, have glossiness.
In one embodiment, the gel coating resin with a thickness of 0.3-0.5mm.Preferably 0.4mm.On the one hand, gel coating resin energy
The surface irregularity for enough covering prepreg, so that the surface of prepreg is more smooth；On the other hand, gel coating resin is capable of providing
Give the surface of bumper certain protective capability.The thickness of gel coat is too thin to easily cause deficient solidification, the too thick easy sagging of the thickness of gel coat,
Cracking and pin hole.
In one embodiment, the release cloth is glassine paper, mylar, polyvinyl chloride film, polyethylene film, polyamides
Imines film or polytetrafluoroethylene film.The type of release cloth is not limited in the present invention, if can make prepreg and vacuum bag it
Between be completely exfoliated.Preferably, the release cloth is polyethylene film with holes, and the porosity on polyethylene film is
47%-54%, aperture 40-90nm, the polyethylene film with holes have the function of breathing freely, and facilitate flow-guiding screen for vacuum bag
In residual air exclude clean, make the surface more smooth of prepreg.
During vacuum solidification, after prepreg overlay, the mold of prepreg is completed with vacuum bag sealing, is heated and cured into
Type.Specifically, after prepreg overlay, auxiliary material is spread on the surface of prepreg, is sealed with sealant tape, the mold of auxiliary material will be completed
It is fitted into vacuum bag, vacuumizes after excluding the air in vacuum bag completely, vacuum bag is sealed, vacuum bag is placed in baking oven
Be heating and curing molding.
In one embodiment, the method for the molding that is heating and curing be will complete auxiliary material mold bag vacuum it is close
It is honored as a queen, in 90 DEG C of heat preservation 55-65min, then in 115 DEG C of heat preservation 85-95min.Ensure that gel coat and prepreg are fully cured.
During demoulding, vacuum bag is taken out from baking oven, is cooled, by bumper after molding from vacuum bag
In take out, make to remove between gel coating resin and release agent, that is, complete demoulding.
In one embodiment, further include scribing line trimming after demoulding, bumper is made after repairing polishing spray.After demoulding, press
The final shape scribing line trimming of bumper, repairing polishing, other by bumper do not apply the surface lacquer of gel coat, that is, complete
The production of bumper.During bumper is made, the outer surface that bumper is completed by applying gel coat is handled, only need to be
The production of bumper can be completed except the other surfaces spraying applied at gel coat for bumper, saves spray time in this way, improves
The production efficiency of bumper.
In one embodiment, the resin in the prepreg is modified imidazole-epoxy-resin systems.Use this kind of resin
Prepreg is low-temperature fast-curing prepreg, and the time being heating and curing can be substantially reduced using this kind of prepreg, can be 120
DEG C heating 30min, that is, curing molding, save curing time, improve the production efficiency of bumper.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of forming method of bumper, which comprises the following steps:
Coating release agent: in the surface coating release agent of mold, release agent solidification；
Apply gel coat: after release agent solidification, applying gel coat on the surface of release agent and form gel coating resin；
It spreads prepreg: after application gel coat immediately or after gel coat surface drying, carrying out the laying of multilayer prepreg on the surface of gel coating resin；
Vacuum solidification: the mold of prepreg is completed with bag vacuum sealing, be heating and curing molding；
Demoulding: it is to be solidified completely after, demoulding, bumper is made.
2. the forming method of bumper according to claim 1, which is characterized in that the release agent be fluorine system releasing agent,
Wax system release agent or silicon systems release agent.
3. the forming method of bumper according to claim 1, which is characterized in that the surface in release agent applies glue
The method that clothing forms gel coating resin is the surface glue spraying clothing formation gel coating resin in release agent, alternatively, in the surface coating clothing of release agent
Form gel coating resin.
4. the forming method of bumper according to claim 1, which is characterized in that the gel coat is thermosetting property gel coat, institute
Stating thermosetting property gel coat is epoxy gel coat, phenolic aldehyde gel coat, polyurethane gel coat or vinyl gel coat.
5. the forming method of bumper according to claim 1, which is characterized in that the gel coating resin with a thickness of 0.3-
0.5mm。
6. the forming method of bumper according to claim 1, which is characterized in that the resin in the prepreg is to be modified
Imidazoles-epoxy-resin systems.
7. the forming method of bumper according to claim 1, which is characterized in that further include that paving is auxiliary after prepreg overlay
Material, the paving auxiliary material are to spread release cloth on the surface of the prepreg, then spread airfelt on the surface of the release cloth, use vacuum
Bag vacuumizes sealed mold, and be heating and curing molding.
8. the forming method of bumper according to claim 7, which is characterized in that the release cloth is glassine paper, terylene
Film, polyvinyl chloride film, polyethylene film, Kapton or polytetrafluoroethylene film.
9. the forming method of bumper according to claim 1, which is characterized in that the method for the molding that is heating and curing is
After the mold for completing auxiliary material is sealed with bag vacuum, in 90 DEG C of heat preservation 55-65min, then in 115 DEG C of heat preservation 85-
95min。
10. the forming method of bumper according to claim 1, which is characterized in that further include scribing line trimming after demoulding, repair
Bumper is made after mending polishing spray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810495875.1A CN110509573A (en) | 2018-05-22 | 2018-05-22 | The forming method of bumper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810495875.1A CN110509573A (en) | 2018-05-22 | 2018-05-22 | The forming method of bumper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110509573A true CN110509573A (en) | 2019-11-29 |
Family
ID=68622240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810495875.1A Pending CN110509573A (en) | 2018-05-22 | 2018-05-22 | The forming method of bumper |
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| CN (1) | CN110509573A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032233A (en) * | 2020-08-17 | 2020-12-04 | 西安交通大学 | High-specific energy-absorbing bionic composite material structure and manufacturing method thereof |
| EP3928961A1 (en) * | 2020-06-22 | 2021-12-29 | Embraer S.A. | Process for in-mold coating of composite aircraft components |
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| CN106313585A (en) * | 2016-11-10 | 2017-01-11 | 无锡市明盛强力风机有限公司 | Bumper resin transfer molding process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3928961A1 (en) * | 2020-06-22 | 2021-12-29 | Embraer S.A. | Process for in-mold coating of composite aircraft components |
| CN112032233A (en) * | 2020-08-17 | 2020-12-04 | 西安交通大学 | High-specific energy-absorbing bionic composite material structure and manufacturing method thereof |
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Application publication date: 20191129 |