CN105269836A - Method for manufacturing automobile part products through sheet molding compounds (SMC) - Google Patents
Method for manufacturing automobile part products through sheet molding compounds (SMC) Download PDFInfo
- Publication number
- CN105269836A CN105269836A CN201510808154.8A CN201510808154A CN105269836A CN 105269836 A CN105269836 A CN 105269836A CN 201510808154 A CN201510808154 A CN 201510808154A CN 105269836 A CN105269836 A CN 105269836A
- Authority
- CN
- China
- Prior art keywords
- smc
- grid
- goods
- auto
- laying
- 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.)
- Granted
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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
Abstract
The invention provides a method for manufacturing automobile part products through sheet molding compounds (SMC). The method includes the steps that dies are heated; the SMCs are weighed and cut; the SMCs are layered in a pyramid manner, wherein the gridding SMCs are laid at the bottommost layer of the lower die, and the disordered glass fiber SMCs are sequentially laid on the gridding SMCs from big to small; the upper die is assembled at a highest speed before making contact with materials, is assembled at the speed being 3-10 m/s after making contact with the materials, and performs die pressing under the pressure being 800-1400 T/m<2>; and the steps of pressure-maintaining molding and the like are conducted. By means of the method, the risk that automobile parts break off when suffering from external impacts is reduced, and the risk that the automobile parts break off and deform when suffering from external pressure is also reduced.
Description
Technical field
The present invention is specifically related to a kind of preparation method of SMC auto-parts goods.
Background technology
The SMC mainly unordered short glass fiber SMC of the production employing of current SMC (sheet molding compound) auto-parts goods, and the bending strength of existing unordered short glass fiber SMC, hot strength, impact strength all cannot meet the requirement of the high auto-parts of load
Summary of the invention
The technical problem to be solved in the present invention, is the preparation method providing a kind of SMC auto-parts goods.
The present invention is achieved in that a kind of preparation method of SMC auto-parts goods, comprises the following steps:
(1) mold heated: heating mould to patrix temperature 150 DEG C, counterdie temperature 145 DEG C, and mould everywhere the temperature difference be no more than 10 DEG C;
(2) weigh and cut out: the weight according to goods is weighed to glass fibers SMC and grid SMC, and by trimmed grid SMC to the 60%-100% of product size, wherein grid SMC is of a size of maximum;
(3) laying: carry out laying according to pyramid, is layed in the bottom of counterdie by grid SMC, glass fibers SMC according to the descending lay successively of size above grid SMC;
(4) matched moulds: at closure pressing speed: patrix with prestissimo matched moulds, starts with speed 3-10m/s matched moulds, then at pressure 800-1400T/m at contact material before contact material
2under carry out mold pressing;
(5) pressurize is shaping: according to dwell time/that goods main wall thick=60s/mm carries out pressurize is shaping, goods are taken out in last die sinking.
Preferably, the Gitterfasern kind in described grid SMC is glass fibre, carbon fiber or aramid fiber.
Preferably, in described step (3) laying, the laying number of plies of grid SMC is 1 ~ 2 layer.
Preferably, described grid SMC is of a size of the 60%-90% of product size.
The invention has the advantages that: reduce the risk that auto parts and components suffer to occur during external impact fracture; Reduce auto parts and components to suffer to rupture and the risk of being out of shape during external pressure.
Detailed description of the invention
A preparation method for SMC auto-parts goods, comprises the following steps:
(1) mold heated: heating mould to patrix temperature 150 DEG C, counterdie temperature 145 DEG C, and mould everywhere the temperature difference be no more than 10 DEG C;
(2) weigh and cut out: the weight according to goods is weighed to glass fibers SMC and grid SMC, and by trimmed grid SMC to the 60%-100% (wherein in embodiment 1,2,3,4, the size of grid SMC is cut to 60%, 80%, 90%, 100% of product size respectively) of product size, wherein grid SMC is of a size of maximum; Grid SMC is layered on the bottom of mould, and therefore size needs maximum, can carry out grid SMC cutting according to maximum area needed for mould laying.The size of described grid SMC is generally the 60%-90% of product size, requires that high region need reach 100% covering in certain strength.Gitterfasern kind in described grid SMC is glass fibre, carbon fiber or aramid fiber (can select according to the requirement of intensity).
(3) laying: carry out laying according to pyramid, is layed in the bottom of counterdie by grid SMC, glass fibers SMC according to the descending lay successively of size above grid SMC; During matched moulds, glass fibers SMC first touches patrix, and glass fibers SMC mobility is better, gas can be caught up with outside mould from mold center.The laying number of plies of grid SMC is 1 ~ 2 layer (wherein in embodiment 1,2,3,4, the number of plies of grid SMC is respectively 1 layer, 1 layer, 2 layers, 2 layers), but need to adopt at least 1 layer unorderedly shortly to cut SMC above grid SMC, reason is the good fluidity of unordered short glass fiber SMC, fillibility is good, easily gas is discharged mould, make products appearance face smooth, evenly, spray paint and reach A level surface requirements.
(4) matched moulds: at closure pressing speed: patrix with prestissimo matched moulds, starts with speed 3-10m/s matched moulds, then at pressure 800-1400T/m at contact material before contact material
2under carry out mold pressing; Wherein in embodiment 1,2,3,4, the closure pressing speed after contact material is respectively 3m/s, 5m/s, 7m/s, 9m/s, 10m/s, and molding pressure is respectively 800T/m
2, 1000T/m
2, 1200T/m
2, 1400T/m
2
Patrix is fast at leading portion closure pressing speed, is that when preventing closure pressing speed from crossing slow, resin solidifies on mold heat, forms dry spot at product surface; Back segment closure pressing speed is slow, resin is slowly promoted toward die edge, is beneficial to exhaust.
(5) pressurize is shaping: according to dwell time/that goods main wall thick=60s/mm carries out pressurize is shaping, makes resin have time enough, in mould, curing reaction occurs; Goods are taken out in last die sinking.
The property indices of the SMC auto-parts goods that the present invention obtains is as follows:
Grid glass SMC and complete unordered SMC product process and performance comparison
Note:
The unordered SMC of 30%GF is: the auto-parts goods (product of prior art) that 30% glass fibers SMC makes.
30%GF and 1 layer of grid SMC is: the auto-parts goods that 30% glass fibers and 1 layer of grid SMC make.
30%GF and 2 layer of grid SMC is: the auto-parts goods that 30% glass fibers and 2 layers of grid SMC make.
The present invention has the following advantages:
1. grid SMC lay is in product non-appearance face, does not affect the requirement on product A level surface;
2. the bending strength of SMC auto-parts goods is high, resists external force deformation ability strong;
3. the impact strength of SMC auto-parts goods is high, resists external impacts ability strong;
4. Gitterfasern is in article inner surface, can prevent SMC auto-parts goods generation outbreak-crash.
Claims (4)
1. a preparation method for SMC auto-parts goods, is characterized in that: comprise the following steps:
(1) mold heated: heating mould to patrix temperature 150 DEG C, counterdie temperature 145 DEG C, and mould everywhere the temperature difference be no more than 10 DEG C;
(2) weigh and cut out: the weight according to goods is weighed to glass fibers SMC and grid SMC, and by trimmed grid SMC to the 60%-100% of product size, wherein grid SMC is of a size of maximum;
(3) laying: carry out laying according to pyramid, is layed in the bottom of counterdie by grid SMC, glass fibers SMC according to the descending lay successively of size above grid SMC;
(4) matched moulds: at closure pressing speed: patrix with prestissimo matched moulds, starts with speed 3-10m/s matched moulds, then at pressure 800-1400T/m at contact material before contact material
2under carry out mold pressing;
(5) pressurize is shaping: according to dwell time/that goods main wall thick=60s/mm carries out pressurize is shaping, goods are taken out in last die sinking.
2. the preparation method of a kind of SMC auto-parts goods as claimed in claim 1, is characterized in that: the Gitterfasern kind in described grid SMC is glass fibre, carbon fiber or aramid fiber.
3. the preparation method of a kind of SMC auto-parts goods as claimed in claim 1, is characterized in that: in described step (3) laying, and the laying number of plies of grid SMC is 1 ~ 2 layer.
4. the preparation method of a kind of SMC auto-parts goods as claimed in claim 1, is characterized in that: described grid SMC is of a size of the 60%-90% of product size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510808154.8A CN105269836B (en) | 2015-11-20 | 2015-11-20 | A kind of preparation method of SMC auto-parts product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510808154.8A CN105269836B (en) | 2015-11-20 | 2015-11-20 | A kind of preparation method of SMC auto-parts product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105269836A true CN105269836A (en) | 2016-01-27 |
| CN105269836B CN105269836B (en) | 2017-07-07 |
Family
ID=55140088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510808154.8A Active CN105269836B (en) | 2015-11-20 | 2015-11-20 | A kind of preparation method of SMC auto-parts product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105269836B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109624177A (en) * | 2018-12-28 | 2019-04-16 | 赛史品威奥（唐山）结构复合材料有限公司 | A kind of picard cargo box back bucket once through moulding technology |
| CN112248485A (en) * | 2020-09-15 | 2021-01-22 | 广州汽车集团股份有限公司 | Manufacturing method of fender |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1954989A (en) * | 2005-10-26 | 2007-05-02 | 原桂才 | Process for manufacturing table tennis table top by resin-base glass fibre reinforced fibre plate |
| CN1995125A (en) * | 2006-12-21 | 2007-07-11 | 江苏双良复合材料有限公司 | Glass fiber felt reinforced polyproplene composite material and its product rubber seasaw |
| CN103213231A (en) * | 2013-03-20 | 2013-07-24 | 成都顺美国际贸易有限公司 | Mold pressing method for unidirectional high strength SMC molded product |
| CN103465423A (en) * | 2013-09-06 | 2013-12-25 | 陕西华特新材料股份有限公司 | Method for manufacturing glass steel signal box body |
| CN103978614A (en) * | 2014-05-07 | 2014-08-13 | 福建海源新材料科技有限公司 | SMC compression molding process for interior and exterior corner templates of building |
| CN104029445A (en) * | 2014-06-24 | 2014-09-10 | 浙江杉盛模塑科技有限公司 | Smc product and preparation method thereof |
-
2015
- 2015-11-20 CN CN201510808154.8A patent/CN105269836B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1954989A (en) * | 2005-10-26 | 2007-05-02 | 原桂才 | Process for manufacturing table tennis table top by resin-base glass fibre reinforced fibre plate |
| CN1995125A (en) * | 2006-12-21 | 2007-07-11 | 江苏双良复合材料有限公司 | Glass fiber felt reinforced polyproplene composite material and its product rubber seasaw |
| CN103213231A (en) * | 2013-03-20 | 2013-07-24 | 成都顺美国际贸易有限公司 | Mold pressing method for unidirectional high strength SMC molded product |
| CN103465423A (en) * | 2013-09-06 | 2013-12-25 | 陕西华特新材料股份有限公司 | Method for manufacturing glass steel signal box body |
| CN103978614A (en) * | 2014-05-07 | 2014-08-13 | 福建海源新材料科技有限公司 | SMC compression molding process for interior and exterior corner templates of building |
| CN104029445A (en) * | 2014-06-24 | 2014-09-10 | 浙江杉盛模塑科技有限公司 | Smc product and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109624177A (en) * | 2018-12-28 | 2019-04-16 | 赛史品威奥（唐山）结构复合材料有限公司 | A kind of picard cargo box back bucket once through moulding technology |
| CN112248485A (en) * | 2020-09-15 | 2021-01-22 | 广州汽车集团股份有限公司 | Manufacturing method of fender |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105269836B (en) | 2017-07-07 |
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