CN107914357A - A kind of preparation method of bumper - Google Patents
A kind of preparation method of bumper Download PDFInfo
- Publication number
- CN107914357A CN107914357A CN201711144364.7A CN201711144364A CN107914357A CN 107914357 A CN107914357 A CN 107914357A CN 201711144364 A CN201711144364 A CN 201711144364A CN 107914357 A CN107914357 A CN 107914357A
- Authority
- CN
- China
- Prior art keywords
- preparation
- bumper
- polyurea elastomer
- crossbeam
- urethane composition
- 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
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 229920002396 Polyurea Polymers 0.000 claims abstract description 21
- 229920001971 elastomer Polymers 0.000 claims abstract description 21
- 239000000806 elastomer Substances 0.000 claims abstract description 21
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 239000007921 spray Substances 0.000 claims abstract description 5
- 239000004814 polyurethane Substances 0.000 claims description 22
- 238000005187 foaming Methods 0.000 claims description 20
- 229920002635 polyurethane Polymers 0.000 claims description 13
- 239000006260 foam Substances 0.000 claims description 8
- 239000004088 foaming agent Substances 0.000 claims description 5
- 229920000570 polyether Polymers 0.000 claims description 5
- 229920005862 polyol Polymers 0.000 claims description 5
- 229920001228 polyisocyanate Polymers 0.000 claims description 4
- 239000005056 polyisocyanate Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 239000003381 stabilizer Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 3
- -1 ester polyol Chemical class 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 239000000945 filler Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000003139 buffering effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 14
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 229920005830 Polyurethane Foam Polymers 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- 239000011496 polyurethane foam Substances 0.000 description 3
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 150000003077 polyols Chemical class 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 235000007926 Craterellus fallax Nutrition 0.000 description 1
- 240000007175 Datura inoxia Species 0.000 description 1
- 206010000269 abscess Diseases 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002789 length control Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/128—Internally reinforcing constructional elements, e.g. beams
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2101/00—Manufacture of cellular products
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The application belongs to auto parts and components field, and in particular to a kind of preparation method of bumper.The preparation method of bumper provided by the present invention, comprises the following steps：A) in mold cavity surfaces Spray Polyurea Elastomer, cure；B) metallic framework is placed in mould, is then injected into urethane composition, the urethane composition is foamed in dies cavity curing, the demoulding, obtains the bumper.The preparation method process saving, shortens the production time, improves production efficiency, also significantly reduces primary coat loss.The bumper surface compact smooth and beautiful appearance obtained by the above method, tensile strength is high, has good elastic characteristic, good buffering effect can be played when colliding.
Description
Technical field
The invention belongs to auto parts and components field, and in particular to a kind of preparation method of bumper.
Background technology
The main material of orthodox car bumper is polyurethane, by polyether polyol (- OH) and polyisocyanates (- NCO)
Chemical polymerization forms, and when reaction needs the foaming agents such as different auxiliary agents and water to participate in jointly.Production when by polyether polyol, urge
The raw materials such as agent, foam stabiliser and foaming agent are mixed to get " white material ", and when use is high with the thick MDI of another component (being commonly called as black material)
Fast uniformly mixing, is then injected into mould and reacts solidification foaming and be cured into foamed plastic, thus polyurethane plastics product
The normal porosity and looseness in surface, compactness are low.In order to realize the surface film of later stage bumper can reach highlight effect, it is necessary to
A large amount of repairings are carried out to product surface makes its surfacing smooth.Specifically, existing bumper preparation process is subdivided into
Following process：Parting agent special, material feeding are sprayed on mould, demoulds, wash wax (removal parting agent special), primary coat processing
(stomata for removing PU product surfaces) knead dough applies effect paint.Therefore above-mentioned technique greatly and is produced there are tedious process, primary coat loss
The problem of efficiency is low.
The content of the invention
In order to solve the above-mentioned technical problem, it is an object of the invention to provide a kind of preparation method of bumper.
The concrete technical scheme of the present invention is as follows：
A kind of preparation method of bumper, comprises the following steps：
A) in mold cavity surfaces Spray Polyurea Elastomer, cure；
B) metallic framework is placed in mould, is then injected into urethane composition, makes the urethane composition in mould
Foam and cure in inner cavity, the demoulding, obtains the bumper.
Preferably, the preparation method further includes：After demoulding, finishing coat is coated with to the outer surface of the bumper.
Preferably, the thickness of polyurea elastomer described in step a) is 1~2mm；
The hardening time is 5~20s.
Preferably, foam described in step b) time of curing is 10~20min.
Preferably, urethane composition described in step b) includes component A and B component；
The component A is：Polyethers/ester polyol, foaming agent, catalyst, foam stabiliser and water；
The B component is：Polyisocyanates.
Preferably, the raw material of the step a) polyurea elastomer contains color filters.
Preferably, the bumper includes：Polyurethane foaming layer, the interior metal bone arranged on the polyurethane foaming layer
Frame, is coated on the polyurea elastomer of the polyurethane foaming layer outer surface.
It is furthermore preferred that the bumper further includes：Colored strata, the colored strata are coated in the polyureas
Elastomer deviates from the outside of the polyurethane foaming layer.
Preferably, the bumper is mainly made of two crossbeams and two curved booms；
Described two curved booms are separately positioned on the both ends of the crossbeam so that the crossbeam and curved boom surround one jointly
Area of space.
It is furthermore preferred that one of crossbeam, which is equipped with, is used for the mounting portion that is connected with body of a motor car, on another crossbeam
Equipped with bulge-structure.
Compared with traditional bumper preparation process, the present invention has the following advantages：
A) Spray Polyurea Elastomer (SPUA) has closed pore performance good, and porous character will not be formed on surface after curing, with
And with dies cavity without chemical reaction easily the demoulding the advantages that, the present invention passes through in one layer of polyurethane foam material layer surface spraying
Polyurea elastomer, while eliminate in traditional handicraft and spray parting agent special on mould, wash the multiple tracks work such as wax and primary coat processing
Sequence, not only shortens the production time, improves production efficiency, also significantly reduces primary coat loss；
B) outer surface of the bumper obtained by the above method is polyurea elastomer, with inner urethane foaming material
Material (PU expanded materials) is tightly combined, its surface compact smooth and beautiful appearance, and tensile strength is high；Inside uses polyurethane foam material,
Recycling is easy, environmentally protective；
C) outer surface of bumper prepared by the present invention is polyurea elastomer, and inside is PU expanded materials, both of which
For the elastomer with favorable elasticity characteristic, good buffering effect can be played when colliding, so as to protect vehicle and row
People；Meanwhile metallic framework is installed with PU expanded materials, the rigidity of bumper is greatly strengthen, structure is fixed, and is met
The primary demand of bumper.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the cross section of bumper prepared by embodiment 1；
Fig. 2 is the agent structure schematic diagram of bumper prepared by embodiment 1；
Fig. 3 is left view profiles of the Fig. 2 along F-F；
Fig. 4 is the agent structure schematic diagram of the metallic framework of embodiment 1；
Fig. 5 is the left view of Fig. 4.
Reference numeral：Polyurea elastomer 1, polyurethane foaming layer 2, metallic framework 3, colored strata 4, crossbeam 5, curved boom 6,
Mounting portion 51, bulge-structure 52.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
Embodiment 1
The preparation method of the bumper of the present embodiment, specifically includes following steps：
1st, the burr on die surface is removed, spilehole is repaired, cleans the dust on die surface.
2nd, in the SUPA aromatic polyureas elastomers of mold cavity surfaces spraying 1~2mm thickness, treat that aromatic polyureas cures about
Metallic framework is placed after 20s, then carries out material feeding again.
3rd, material feeding
According to the requirement of the requirement of client or product in itself, the density and dosage of PU are determined；Then PU is combined in proportion
The component A and B component of thing, which are input in high pressure foaming machine, carries out high pressure mixing, then injects the mixture into cleaned mould
In tool, injection length control is completed in 10s.Wherein, component A is：Polyethers/ester polyol, foaming agent (HCFC141b, gasification
Source as bubble afterwards, and remove reaction thermal cross-linking agent), catalyst (catalysis foaming and gel reaction), foam stabiliser (carry
The mechanical performance of high foam, makes foam stabilization, and controls the size and structure of abscess) and water.B component is：Polyisocyanates is (thick
MDI)。
4th, closed die after injecting, PU carry out foaming curing in mould, this process needs 10~20min.For
The foaming curing completely in a mold of guarantee PU expanded materials, can be appropriately extended the time.
5th, product is taken out in die sinking, and there are carry out sand the defects of flaw-piece to repair to reach the standard of product to product.
6th, special PU finishing coats are sprayed on the top layer of product so that the appearance color of the product more horn of plenty.
As shown in Figure 1, bumper manufactured in the present embodiment includes：Polyurethane foaming layer 2, it is interior to be arranged on polyurethane foam
The metallic framework 3 of layer 2, is coated on the polyurea elastomer 1 of 2 outer surface of polyurethane foaming layer, coated in polyurea elastomer 1 away from poly-
The colored strata 4 of 2 side of urethane foaming layer.As shown in Figures 2 to 5, the bumper of the present embodiment includes two crossbeams 5
With two curved booms 6；Two curved booms 6 are separately positioned on the both ends of crossbeam 5 so that crossbeam 5 and curved boom 6 surround a space jointly
Region；One of crossbeam 5 is equipped with the mounting portion 51 for being used for being connected with body of a motor car, another crossbeam 5 is equipped with protrusion
Structure 52.
Embodiment 2
The present embodiment and embodiment 1 difference lies in：The raw material of the SUPA aromatic polyureas elastomers sprayed in process 2 contains
Color filters, for adjusting the appearance color of bumper；Without process 6.
Remaining place and embodiment 1 are essentially identical, no longer repeat one by one herein.
Claims (10)
1. a kind of preparation method of bumper, it is characterised in that comprise the following steps：
A) in mold cavity surfaces Spray Polyurea Elastomer, cure；
B) metallic framework is placed in mould, is then injected into urethane composition, makes the urethane composition in dies cavity
Middle foaming curing, the demoulding, obtains the bumper.
2. preparation method according to claim 1, it is characterised in that further include：After demoulding, to the bumper
Outer surface coating finishing coat.
3. preparation method according to claim 1, it is characterised in that the thickness of polyurea elastomer described in step a) is 1
~2mm；
The hardening time is 5~20s.
4. preparation method according to claim 1, it is characterised in that the time for curing of foaming described in step b) for 10~
20min。
5. preparation method according to claim 1, it is characterised in that urethane composition described in step b) includes A groups
Point and B component；
The component A is：Polyethers/ester polyol, foaming agent, catalyst, foam stabiliser and water；
The B component is：Polyisocyanates.
6. preparation method according to claim 1, it is characterised in that the raw material of the step a) polyurea elastomer contains color
Filler.
7. preparation method according to claim 1, it is characterised in that the bumper includes：Polyurethane foaming layer,
The interior metallic framework arranged on the polyurethane foaming layer, is coated on the polyurea elastomer of the polyurethane foaming layer outer surface.
8. preparation method according to claim 7, it is characterised in that the bumper further includes：Colored strata,
The colored strata deviates from the outside of the polyurethane foaming layer coated in the polyurea elastomer.
9. preparation method according to claim 7, it is characterised in that the bumper is mainly by two crossbeams and two
A curved boom composition；
Described two curved booms are separately positioned on the both ends of the crossbeam so that the crossbeam and curved boom surround a space jointly
Region.
10. preparation method according to claim 9, it is characterised in that one of crossbeam, which is equipped with, to be used for and Automobile
The mounting portion that body is connected, another crossbeam are equipped with bulge-structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711144364.7A CN107914357A (en) | 2017-11-17 | 2017-11-17 | A kind of preparation method of bumper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711144364.7A CN107914357A (en) | 2017-11-17 | 2017-11-17 | A kind of preparation method of bumper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107914357A true CN107914357A (en) | 2018-04-17 |
Family
ID=61896616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711144364.7A Pending CN107914357A (en) | 2017-11-17 | 2017-11-17 | A kind of preparation method of bumper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107914357A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110154295A (en) * | 2019-05-31 | 2019-08-23 | 株洲市华丰复合材料有限公司 | A production molding process of polyurea products |
| CN118459702A (en) * | 2024-07-09 | 2024-08-09 | 齐鲁师范学院 | Fiber-reinforced polyurethane foam material for sculpture and construction process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1754914A (en) * | 2004-09-28 | 2006-04-05 | 拜耳（中国）有限公司 | Polyurethane composite material, its preparation method and use |
| JP2006241465A (en) * | 2000-09-22 | 2006-09-14 | Ppg Ind Ohio Inc | Curable polyurethane, coating prepared using the same, and preparation method of the coating |
| CN102371683A (en) * | 2010-08-19 | 2012-03-14 | 李启文 | Polyurethane composite material and preparation method thereof |
| CN104946108A (en) * | 2015-06-26 | 2015-09-30 | 广东元星工业新材料有限公司 | Polyurea-elastomer-sprayed mold and preparation method thereof |
-
2017
- 2017-11-17 CN CN201711144364.7A patent/CN107914357A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006241465A (en) * | 2000-09-22 | 2006-09-14 | Ppg Ind Ohio Inc | Curable polyurethane, coating prepared using the same, and preparation method of the coating |
| CN1754914A (en) * | 2004-09-28 | 2006-04-05 | 拜耳（中国）有限公司 | Polyurethane composite material, its preparation method and use |
| CN102371683A (en) * | 2010-08-19 | 2012-03-14 | 李启文 | Polyurethane composite material and preparation method thereof |
| CN104946108A (en) * | 2015-06-26 | 2015-09-30 | 广东元星工业新材料有限公司 | Polyurea-elastomer-sprayed mold and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110154295A (en) * | 2019-05-31 | 2019-08-23 | 株洲市华丰复合材料有限公司 | A production molding process of polyurea products |
| CN118459702A (en) * | 2024-07-09 | 2024-08-09 | 齐鲁师范学院 | Fiber-reinforced polyurethane foam material for sculpture and construction process |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180417 |