CN110154419A - A kind of production technology preparing bonnet using prepreg cloth - Google Patents
A kind of production technology preparing bonnet using prepreg cloth Download PDFInfo
- Publication number
- CN110154419A CN110154419A CN201810158667.2A CN201810158667A CN110154419A CN 110154419 A CN110154419 A CN 110154419A CN 201810158667 A CN201810158667 A CN 201810158667A CN 110154419 A CN110154419 A CN 110154419A
- Authority
- CN
- China
- Prior art keywords
- bonnet
- prepreg cloth
- production technology
- mold
- preparing
- 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
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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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
-
- 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
- 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
Abstract
The invention discloses a kind of production technologies that bonnet is prepared using prepreg cloth, the following steps are included: (1) prepares prepreg cloth: by a certain proportion of modified epoxy with glass fabric according to pre- laying is made after being impregnated, being dried after mixing, pre- laying is prepreg cloth；(2) mold preheats: rear to carry out mold preheating by preprepared bonnet mold cleaning；(3) it is pressed and molded: preimpregnation being arranged in warmed-up mold and is pressed and molded, vacuumized, is demoulded after molding；(4) test package: product is packed after deburring, inspection after demoulding.A kind of production technology preparing bonnet using prepreg cloth provided by the invention, high production efficiency, short molding cycle can be with mass production.
Description
Technical field
The present invention relates to auto parts and components processing technique field, especially a kind of production that bonnet is prepared using prepreg cloth
Technique.
Background technique
Existing composite material for vehicle bonnet moulding process has several, the relatively rapid moldings such as RTM, hand paste, priming by vacuum
For molding,
Existing moulding process molding cycle is longer, seriously affects production efficiency.And with new-energy automobile market
It continues to develop, strict requirements is proposed to the odd-numbered day production capacity of the manufacturer of composite material bonnet.
Existing small lot production composite material engine cover process is mainly hand paste and priming by vacuum, due to used tree
Resin system is that normal temperature cure system and post-production processing shaggy time are longer, and single split run is covered in 2-3, medium-sized batches
Die closing RTM technique can be used, used resin system can take intermediate temperature setting, due to solidifying after needing preparatory laying and injection
Time is longer, and single split run yield is at 10 sets or so, therefore above two moulding process is not able to satisfy high-volume purchase requirement (list
100 sets of day or more).
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of production technology for preparing bonnet using prepreg cloth, production
High-efficient, short molding cycle can be with mass production.
The technical solution of the present invention is as follows: a kind of production technology that bonnet is prepared using prepreg cloth, is included the following steps,
(1) prepreg cloth is prepared: by a certain proportion of modified epoxy and glass fabric according to being impregnated, dried after mixing
Pre- laying is made after dry, pre- laying is prepreg cloth；
(2) mold preheats: rear to carry out mold preheating by preprepared bonnet mold cleaning；
(3) it is pressed and molded: preimpregnation being arranged in warmed-up mold and is pressed and molded, vacuumized, is demoulded after molding；
(4) test package: product is packed after deburring, inspection after demoulding.
Preferably, in the step (1) modified epoxy be through it is phenolic resin modified, can reach rapid curing effect
Epoxy resin.
Preferably, the weight ratio of modified epoxy and glass fabric is 35: 65 in the step (1).
Preferably, dipping uses cement dipping machine impregnation in the step (1), and fiberglass cloth tape is after steeping vat, through double
Beaming roller is dried after squeezing out extra glue by curing oven, stand-by after winding.
Preferably, drying temperature is 80 DEG C in the step (1), and drying time is 30min ± 2min.
Preferably, the temperature that mold preheats in the step (2) is 150 DEG C ± 1 DEG C.
Preferably, it according to setting thickness carries out that limit is taken to handle when molding in the step (3), pressure maintaining solidifies 10min
± 1min, High temperature release.
Compared with prior art, the invention has the following beneficial effects: provided by the invention a kind of using prepreg cloth preparation
Fast-curing resin system can be used using prepreg compression molding in the production technology of bonnet, by adopting after production prepreg
Take high temperature is die-filling, High temperature release molding cycle can be reduced to greatest extent it is most short, to improve production efficiency, single split run production capacity
It can be achieved 50 sets or more, high production efficiency, short molding cycle can be with mass production；Since this composite material has compared to gold
The designability for belonging to lower density, quite even higher intensity, while material is strong, having high security, (highly anti-fatigue is strong
Degree, low notch sensitivity) the advantages that, meet the lightweight requirements of new-energy automobile.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
With reference to the accompanying drawing and specific embodiment, the present invention will be further described.
As shown in Figure 1, a kind of production technology that bonnet is prepared using prepreg cloth, is included the following steps,
(1) prepreg cloth is prepared: by a certain proportion of modified epoxy and glass fabric according to being impregnated, dried after mixing
Pre- laying is made after dry, pre- laying is prepreg cloth；
In this step, modified epoxy is through epoxy resin that is phenolic resin modified, can reach rapid curing effect；Change
Property epoxy resin and glass fabric weight ratio be 35: 65；And impregnate, dry using cement dipping machine impregnation, strap passes through impregnation
After slot, after twin shaft roller squeezes out extra glue by curing oven drying (drying temperature is 80 DEG C, drying time be 30min ±
2min), stand-by after winding.
(2) mold preheats: rear to carry out mold preheating by preprepared bonnet mold cleaning；
The temperature that mold preheats in this step is 150 DEG C ± 1 DEG C.
(3) it is pressed and molded: preimpregnation being arranged in warmed-up mold and is pressed and molded, vacuumized, is demoulded after molding；
It according to setting thickness carries out that limit is taken to handle when being molded in this step, pressure maintaining solidifies 10min ± 1min, and high temperature is de-
Mould.
(4) test package: product is packed after deburring, inspection after demoulding.
The principle of the present invention are as follows: after prepreg cloth is made using modified epoxy impregnated glass fiber grid cloth in the present invention,
By preforming, by the mold of prepreg cloth laying to preheating, the molded product of side mode is vacuumized by side at a certain temperature；
Since modified epoxy has excellent mechanical performance, by modified curing rate can be obtained greatly improve, it can be achieved that
High temperature release high temperature fill film, by it is pre-soaked semi-finished product prepreg cloth is made after be molded, while molding when keep die cavity in bear
Pressure, with the defect for guaranteeing product surface and being made of bubble, this technique can shorten at double in mold curing times, guarantee to produce
Production efficiency is improved under the premise of quality to greatest extent.
It is noted that the bonnet is to be sandwiched between polyurethane foam sandwich structure by upper layer and lower layer covering, three layers
By being molded integrally formed " sandwich " structure.
The above embodiments are merely a preferred embodiment of the present invention, and cannot limit interest field of the invention with this, because
This is still within the scope of the present invention according to modification, equivalent variations, improvement etc. made by scope of the present invention patent.
Claims (7)
1. a kind of production technology for preparing bonnet using prepreg cloth, it is characterised in that: include the following steps,
(1) prepare prepreg cloth: by a certain proportion of modified epoxy and glass fabric according to being impregnated, being dried after mixing after
Pre- laying is made, pre- laying is prepreg cloth；
(2) mold preheats: rear to carry out mold preheating by preprepared bonnet mold cleaning；
(3) it is pressed and molded: preimpregnation being arranged in warmed-up mold and is pressed and molded, vacuumized, is demoulded after molding；
(4) test package: product is packed after deburring, inspection after demoulding.
2. a kind of production technology for preparing bonnet using prepreg cloth according to claim 1, it is characterised in that: the step
Suddenly modified epoxy is through epoxy resin that is phenolic resin modified, can reach rapid curing effect in (1).
3. a kind of production technology for preparing bonnet using prepreg cloth according to claim 1, it is characterised in that: the step
Suddenly the weight ratio of modified epoxy and glass fabric is 35: 65 in (1).
4. a kind of production technology for preparing bonnet using prepreg cloth according to claim 1, it is characterised in that: the step
Suddenly dipping uses cement dipping machine impregnation in (1), fiberglass cloth tape after steeping vat, after twin shaft roller squeezes out extra glue by
Curing oven drying, it is stand-by after winding.
5. a kind of production technology for preparing bonnet using prepreg cloth according to claim 1, it is characterised in that: the step
Suddenly drying temperature is 80 DEG C in (1), and drying time is 30min ± 2min.
6. a kind of production technology for preparing bonnet using prepreg cloth according to claim 1, it is characterised in that: the step
Suddenly the temperature that mold preheats in (2) is 150 DEG C ± 1 DEG C.
7. a kind of production technology for preparing bonnet using prepreg cloth according to claim 1, it is characterised in that: the step
Suddenly it according to setting thickness carries out that limit is taken to handle when molding in (3), pressure maintaining solidifies 10min ± 1min, High temperature release.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810158667.2A CN110154419A (en) | 2018-02-26 | 2018-02-26 | A kind of production technology preparing bonnet using prepreg cloth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810158667.2A CN110154419A (en) | 2018-02-26 | 2018-02-26 | A kind of production technology preparing bonnet using prepreg cloth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110154419A true CN110154419A (en) | 2019-08-23 |
Family
ID=67635661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810158667.2A Pending CN110154419A (en) | 2018-02-26 | 2018-02-26 | A kind of production technology preparing bonnet using prepreg cloth |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105216342A (en) * | 2015-11-09 | 2016-01-06 | 吉林大学 | Automobile-used carbon fibre composite shape for hat beam preparation method and mould |
| CN107187078A (en) * | 2017-06-28 | 2017-09-22 | 江苏兆鋆新材料股份有限公司 | A kind of quick die press technology for forming of carbon fiber prepreg |
| CN107214975A (en) * | 2017-06-28 | 2017-09-29 | 江苏兆鋆新材料股份有限公司 | One kind simulation coating rapid shaping wet method mould pressing process |
| JP2018187939A (en) * | 2016-07-22 | 2018-11-29 | 住友ベークライト株式会社 | Method for manufacturing sandwich panel |
-
2018
- 2018-02-26 CN CN201810158667.2A patent/CN110154419A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105216342A (en) * | 2015-11-09 | 2016-01-06 | 吉林大学 | Automobile-used carbon fibre composite shape for hat beam preparation method and mould |
| JP2018187939A (en) * | 2016-07-22 | 2018-11-29 | 住友ベークライト株式会社 | Method for manufacturing sandwich panel |
| CN107187078A (en) * | 2017-06-28 | 2017-09-22 | 江苏兆鋆新材料股份有限公司 | A kind of quick die press technology for forming of carbon fiber prepreg |
| CN107214975A (en) * | 2017-06-28 | 2017-09-29 | 江苏兆鋆新材料股份有限公司 | One kind simulation coating rapid shaping wet method mould pressing process |
Non-Patent Citations (2)
| Title |
|---|
| 张耀明等: "《玻璃纤维与矿物棉全书》", 31 March 2001, 化学工业出版社 * |
| 瞿金平等: "《塑料工业手册 注塑、模压工艺与设备》", 31 October 2001, 化学工业出版社 * |
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Application publication date: 20190823 |