CN103707592B - A kind of car engine compartment insulation mat and preparation method - Google Patents
A kind of car engine compartment insulation mat and preparation method Download PDFInfo
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- CN103707592B CN103707592B CN201310736244.1A CN201310736244A CN103707592B CN 103707592 B CN103707592 B CN 103707592B CN 201310736244 A CN201310736244 A CN 201310736244A CN 103707592 B CN103707592 B CN 103707592B
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Abstract
A kind of car engine compartment insulation mat and preparation method, special feature is, described heat insulating mattress is made up of four structure sheafs being admittedly integrated, and four structure sheafs are followed successively by: aluminium foil layer, PU foaming layer, EVA layer and XPE layer.The inventive method includes noting aluminum moulding pressing processing aluminium foil layer, PU foaming layer spraying, molding the step such as EVA layer and bonding XPE layer.The main advantages of the present invention as follows: 1, product of the present invention sets up XPE bottom, well can fit with vehicle body sheet metal, it is to avoid the gap between product and vehicle body sheet metal occurs, make heat insulating mattress have excellent sound-absorbing, sound insulation, effect of heat insulation；2, the inventive method uses aluminium foil note aluminum moulding process, makes product aluminium foil top layer comply fully with product profile requirement, solves grand master pattern pressure processing and frequently results in the problem of top layer aluminium foil drawing crack in forming process, improves product quality；3, the technique using PU foaming layer to spray on aluminium foil layer, can improve stock utilization, reduces wastage of material.
Description
Technical field
The present invention relates to a kind of automotive interior part and preparation method, particularly car engine compartment insulation mat and preparation method.
Background technology
With the fast development of automotive engineering, consumer is more and more higher to the requirement of car load driving environment, and Ge great automobile main frame maker is also making great efforts lifting automobile entirety comfort level.For preventing heat and the incoming driving cabin of noise that electromotor produces, it will usually install car engine compartment insulation mat at the position, cabin of automobile engine, play heat insulation, shockproof, the effect of sound insulation.Conventional car engine compartment insulation mat is three-decker, and it is composited by mould heat pressure by surfaces of aluminum layers of foil, the foaming layer of intermediate urethane PU and the trilaminate material that bottom is non-woven fabrics.This common structure there is the problem that enging cabin heat insulating mattress can not well be fitted with vehicle body sheet metal with bottom after installing, and there is gap, engine noise and heat can pass to driver's cabin by gap, has influence on the noise reduction effect of heat insulation of heat insulating mattress.Additionally, the conventional production practices of enging cabin heat insulating mattress is that prefabricated each layer of sheet material is compound, again through cutting out formation heat insulating mattress product through molding.This traditional handicraft there is the problem that 1, aluminium foil layer is relatively thin and ductility is not enough, is carried out the mold pressing processing that profile is complicated, frequently results in aluminium foil layer drawing crack, thus affect the heat-proof quality of product in forming process；2, can produce many leftover pieces in the product compression molding course of processing, these leftover pieces process only as refuse, make waste of raw materials, add the cost of manufacture of product.
Summary of the invention
Present invention aims to the drawback of prior art, it is provided that a kind of sound-absorbing, heat insulation, the car engine compartment insulation mat of good damping effect；It is a further object of the present invention to provide the preparation method of described enging cabin heat insulating mattress.
Problem of the present invention realizes with following technical proposals:
A kind of car engine compartment insulation mat, it is Rotating fields, and special feature is: described heat insulating mattress is made up of four structure sheafs being admittedly integrated, and described four structure sheafs are followed successively by: aluminium foil layer, PU foaming layer, EVA layer and XPE layer.
Above-mentioned car engine compartment insulation mat, the thickness of described aluminium foil layer is 0.1-0.12mm, and the thickness of described PU foaming layer is 20-30mm, density is 17kg/m3, the thickness of described EVA layer is 2-3mm, density is 1.7g/cm3, described XPE layer thickness is 2-3mm, is 30 times of foaming.
The preparation method of above-mentioned car engine compartment insulation mat, it carries out as steps described below:
A, note aluminum moulding pressing processing aluminium foil layer: this step is for noting enforcement on the moulding press of aluminum, for noting the moulding press of aluminum, there are upper die and lower die, cavity after upper die and lower die are involutory complies fully with product piece profile, after upper and lower mould matched moulds, liquid aluminium enters lower mold from the material hole being positioned in the middle part of lower mold under pressure, i.e. obtains aluminium foil layer after cooling；
B, PU foaming layer sprays: the lower mold being loaded with aluminium foil layer is transported to spraying area, and the aluminium foil layer in lower mold sprays PU foaming layer；
C, mold pressing EVA layer: after PU foaming layer has sprayed, the lower mold being loaded with aluminium foil layer and PU foaming layer is carried and is used for being combined in the moulding press of EVA layer, the upper mold of this moulding press has adsorption function, in advance by EVA layer sheet material to upper mold, the lower mold of aluminium foil layer to be loaded with and PU foaming layer carries the rear mold press matched moulds that puts in place, has molded the compound of EVA layer；
The semi-finished articles bonding station of entrance after d, bonding XPE layer: EVA have molded uses polyolefin hot-melt to carry out the bonding of XPE layer of sheet material；
E, Water Cutting: the cleaved molding of semi-finished articles that four structure sheafs are complex as a whole, form product piece.
Above-mentioned car engine compartment insulation mat preparation method, it is characterised in that in described a step, aluminum liquid material feeding temperature is 730 DEG C ± 20 DEG C, and material feeding pressure is 0.06-0.15 MPa；Upper mold temperature is 180 DEG C ± 10 DEG C, and lower mold temperature is 210 DEG C ± 20 DEG C；Pressurize 300-330S after aluminum liquid material feeding, die sinking natural cooling, it is down to 40 DEG C at a temperature of making aluminium foil surface.
Above-mentioned car engine compartment insulation mat preparation method, in described b step, the PU foaming layer of spraying uses the spraying of Regular low density perforate PU foam, and quantity for spray controls in the 20g-80g/ second, and spray time controlled in the 1-5 second.
Above-mentioned car engine compartment insulation mat preparation method, described step a, b, c, d complete on three moulding presss, two spraying areas, two bonding stations, described three moulding presss are referred to as a moulding press, No. two moulding presss, No. three moulding presss, wherein, No. two moulding presss are for noting the mold pressing for EVA layer of aluminum, a moulding press and No. three moulding presss, and three moulding presss share two structure lower molds identical, that be provided with material hole；No. two moulding presss are provided with liquid aluminium storage device, and liquid aluminium storage device is communicated with the air pipe line of air compression plant；The upper mold of a number moulding press and No. three moulding presss is equipped with the negative-pressure adsorption hole connecting negative pressure device；Described each spraying area is provided with spray paint robot.
Above-mentioned car engine compartment insulation mat preparation method, step a, b, c, d carry out according to following flow process:
1., by EVA layer sheet material to a machine upper mold and No. three machine upper molds；
2., No. two moulding presss note aluminum, after No. two moulding press matched moulds, compressed air is in air pipe line enters into liquid aluminium storage device, and aluminum liquid is slowly injected into No. two machine lower molds by material hole under pressure, and cooled, aluminium foil layer forms；
3., No. two machine lower molds forming aluminium foil layer are transplanted on the first spraying area, spray robot spray PU foaming layer to the aluminium foil layer of No. two machine lower molds；
4., PU foaming layer has sprayed in rear No. two machine lower molds move to No. three moulding presss by track and has carried out EVA sheet mold pressing；Meanwhile machine lower mold enters into No. two moulding presss by track and carries out noting aluminum；
5., after EVA has molded in No. three moulding presss, semi-finished product enter the second bonding adnexa station, and to carry out XPE layer bonding, thus completes the making of first car engine compartment insulation mat semi-finished product；
6., a machine lower mold aluminium foil layer is transplanted on the second spraying area by track after forming, by spray robot to a machine lower mold aluminium foil layer spraying PU foaming layer；
7., PU foaming layer has sprayed in a rear machine lower mold moves to a moulding press by track and has carried out EVA sheet mold pressing；Meanwhile No. two machine lower molds are sent to No. two moulding presss and carry out noting aluminum；
8., after the EVA of a moulding press molded, semi-finished product enter the first bonding station, and to carry out XPE layer bonding, thus completes the making of second car engine compartment insulation mat semi-finished product；
Said process circulation is carried out.
The present invention is directed to improve enging cabin heat insulating mattress noise reduction heat-proof quality and eliminate course of processing aluminium foil and rupture etc. and to ask and improved, its major advantage is as follows: 1, product of the present invention is four-layer structure, set up XPE bottom, bottom abscess is thin, tensile strength is high for this, good springiness, well can fit with vehicle body sheet metal, the installation quality of the product that improve, it is to avoid the gap between product and vehicle body sheet metal occur, makes heat insulating mattress have excellent sound-absorbing, sound insulation, effect of heat insulation；2, the inventive method uses aluminium foil note aluminum moulding process, makes product aluminium foil layer comply fully with product profile requirement, solves grand master pattern pressure processing and frequently results in the problem of top layer aluminium foil drawing crack in forming process, improves product quality；3, the technique using PU foaming layer to spray on aluminium foil layer, improves stock utilization, reduces wastage of material；4, utilize three molds alternately to work, improve work efficiency, it is achieved utilization rate of equipment and installations maximizes.
Accompanying drawing explanation
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the process chart of the inventive method；
Fig. 2 is the structural representation of product of the present invention.
In figure, each list of reference numerals is: 1 a, moulding press, 1-1, a machine upper mold, 1-2, a machine lower mold, 2, No. two moulding presss, 2-1, No. two machine upper molds, 2-2, No. two machine lower molds, 3, No. three moulding presss, 3-1, No. three machine upper molds, 4, negative pressure device, 5, liquid aluminium storage device, 5-1, air pipe line, 5-2, material hole, 6, track, the 7, first spraying area, the 8, second spraying area, 9, the first bonding station, 10, the second bonding station, 11, aluminium foil layer, 12, PU foaming layer, 13, EVA layer, 14, XPE layer.
Detailed description of the invention
Referring to Fig. 2, product car engine compartment insulation mat of the present invention is Rotating fields, and it is made up of four structure sheafs, and these four structure sheafs are followed successively by from top to bottom, aluminium foil layer 11, PU foaming layer 12, EVA layer 13 and XPE layer 14.By these four structure sheafs car engine compartment insulation mat formed that is admittedly integrated, there is good heat insulation, sound insulation, cushioning effect.The surface of described heat insulating mattress is aluminium foil layer, and the thickness of aluminium foil layer is 0.1-0.12mm, the heat that aluminium foil layer distributes when can effectively reflect electromotor work.The second layer is PU foaming layer (also known as polyurethane PU foaming layer), and PU foaming layer polyurethane density is 17kg/ m3, thickness is 20-30mm, and this layer mainly reduces noise during electromotor work, is cut down the transmission of sound wave by the perforate bubble within PU.Third layer is EVA layer (ethylene-vinyl acetate copolymer material layer), and density is 1.7g/cm3, thickness is 2-3mm, and this layer of Main Function is the effect that the noise to enging cabin plays isolation.4th layer is XPE layer (processes for chemically crosslinked polyethylene foamed material layer), XPE layer thickness is 2-3mm, is 30 times of foaming, the problem solving common heat insulating mattress EVA layer and vehicle body sheet metal fit clearance after setting up this layer well, make product piece preferably fit with plates of automobile, reach the purpose of seamless cooperation.
Referring to Fig. 1, preparing the capital equipment that product of the present invention used is: a moulding press 1, No. two moulding presss 2, No. three moulding presss 3, is respectively equipped with the first spraying area 7 of spray paint robot, the second spraying area 8 and first bonding station the 9, second bonding station 10.Three moulding presss share the lower mold that two structures are identical, be provided with material hole.No. two moulding presss prepare aluminium foil layer by the way of matched moulds note aluminum, and No. two moulding presss are provided with liquid aluminium storage device 5, and liquid aluminium storage device is communicated with the air pipe line 5-1 of air compression plant.A number moulding press and No. three moulding presss are for the mold pressing of EVA layer, and machine upper mold 1-1 and No. three machine upper molds 3-1 are provided with the negative-pressure adsorption hole connecting negative pressure device 4.First spraying area the 7, second spraying area 8 is used for spraying PU foaming layer.First bonding station the 9, second bonding station 10 is for bonding XPE layer.
Referring still to Fig. 1, the inventive method is carried out as steps described below:
A, note aluminum processing and forming aluminium foil layer: this step is being implemented on No. two moulding presss of aluminum for noting, No. two moulding presss there is matched moulds after No. two machine upper molds 2-1 complying fully with product piece profile of cavity and No. two machine lower molds 2-2.After matched moulds, liquid aluminium, under the compressed-air actuated effect being passed through liquid aluminium storage device, enters lower mold from the material hole 5-2 being positioned in the middle part of lower mold, i.e. obtains aluminium foil layer after cooling.In this step, aluminum liquid material feeding temperature 730 DEG C ± 20 DEG C, pressure controls at 0.06-0.15MPa according to the aluminium foil layer grammes per square metre of product requirement.During note aluminum, the temperature of No. two machine upper molds 2-1 is 180 DEG C ± 10 DEG C, and the temperature of No. two machine lower molds 2-2 is 210 DEG C ± 20 DEG C.Mould uses the mode of heating plate to heat, and thinks and prevents aluminum liquid from solidifying rapidly after entering mould.Pressurize 330s after aluminum liquid material feeding, die sinking natural cooling is down to 40 DEG C at a temperature of making aluminium foil surface；
B, PU foaming layer sprays: the lower mold being loaded with aluminium foil layer is transported to the first or second spraying area, by spraying PU foaming layer on the aluminium foil layer of spray paint robot PU in lower mold, PU foaming layer uses the spraying of Regular low density perforate PU foam, quantity for spray controls in the 20g-80g/ second, and spray time controlled in the 1-5 second；
C, mold pressing EVA layer: after PU foaming layer has sprayed, the lower mold being loaded with aluminium foil layer and PU foaming layer is carried in the moulding press or No. three moulding presss that are used for being combined EVA layer, the upper mold of above-mentioned two moulding presss is equipped with the negative-pressure adsorption connecting negative pressure device 4, they are in advance by EVA layer sheet material to upper mold, matched moulds after the lower mold being loaded with aluminium foil layer and PU foaming layer is delivered to moulding press, has molded the compound of EVA layer；
D, bonding XPE layer: EVA have molded rear semi-finished articles and have entered the first bonding bonding station of station 9 or the second 10, use polyolefin hot-melt to carry out the bonding of XPE layer of sheet material；
E, the cleaved molding of semi-finished articles that four structure sheafs are complex as a whole.
In above-mentioned steps, step a and step b are the committed steps that the present invention improves.Step a makes aluminium foil layer according to the geometric profile of car engine compartment insulation mat profile in the way of note aluminum, fundamentally overcome aluminium foil sheet material in commonsense method and cause the drawback of aluminium foil layer drawing crack through mold pressing machine-shaping, thus eliminate because aluminium foil layer ruptures the hidden danger of the heat-proof quality affecting product piece, improve the quality of product piece.Step b uses the method spraying PU foaming layer on the aluminium foil layer of molding, compare the conventional method directly using PU foaming layer sheet material to mold, one of its advantage is to make PU foaming layer preferably fit with aluminium foil layer, the two of advantage are not produce leftover pieces, improve stock utilization, reduce wastage of material.
For improving production efficiency, it is achieved utilization rate of equipment and installations maximizes, described step a, b, c, d are carried out according to following flow process:
1., by EVA layer sheet material to machine upper mold 1-1 and No. three machine upper molds 3-1；
2., No. two moulding press 2 note aluminum, after No. two moulding press matched moulds, compressed air is in air pipe line 5-1 enters into liquid aluminium storage device 5, owing to the pressure in liquid aluminium storage device increases, aluminum liquid is slowly injected into No. two machine lower molds 2-2 by material hole 5-2 under pressure, by the cooling of mould, form the aluminium foil layer mated with described heat insulating mattress profile；
3., No. two machine lower molds 2-2 forming aluminium foil layer are transplanted on the first spraying area 7, spray robot spray PU foaming layer to the aluminium foil layer of No. two machine lower molds 2-2；
4., PU foaming layer has sprayed in rear No. two machine lower molds 2-2 move to No. three moulding presss 3 by track 6 and has carried out EVA sheet mold pressing；Meanwhile machine lower mold 1-2 enters into No. two moulding presss by track 6 and carries out noting aluminum；
5., after EVA layer has molded in No. three moulding presss, semi-finished articles enters the second bonding adnexa station 10, and to carry out XPE layer bonding, thus completes the making of first car engine compartment insulation mat semi-finished product；
6., a machine lower mold 1-2 aluminium foil layer is transplanted on the second spraying area 8 by track 6 after forming, by spray robot to a machine lower mold 1-2 aluminium foil layer spraying PU foaming layer；
7., PU foaming layer has sprayed in rear machine lower mold 1-2 moves to a moulding press 1 by track 6 and has carried out EVA sheet mold pressing；Meanwhile No. two machine lower molds 2-2 are sent to No. two moulding presss and carry out noting aluminum；
8., after EVA has molded in a moulding press 1, semi-finished product enter the first bonding station 9, and to carry out XPE layer bonding, thus completes the making of second car engine compartment insulation mat semi-finished product；
Said process circulation is carried out.
Claims (5)
1. the preparation method of a car engine compartment insulation mat, it is characterised in that described car engine compartment insulation mat is Rotating fields, is made up of four structure sheafs being admittedly integrated, and four structure sheafs are followed successively by: aluminium foil layer, PU foaming layer, EVA layer and XPE layer；The thickness of described aluminium foil layer is 0.1-0.12mm, and the thickness of described PU foaming layer is 20-30mm, density is 17kg/m3, the thickness of described EVA layer is 2-3mm, density is 1.7g/cm3, the thickness of described XPE layer is 2-3mm, is 30 times of foaming；The preparation method of described car engine compartment insulation mat is carried out as steps described below:
A, note aluminum moulding pressing processing aluminium foil layer: this step is for noting enforcement on the moulding press of aluminum, for noting the moulding press of aluminum, there is lower mold and upper mold, lower mold and upper mold involutory after cavity comply fully with product piece profile, after upper and lower mould matched moulds, liquid aluminium enters lower mold from the material hole being positioned in the middle part of lower mold under pressure, i.e. obtains aluminium foil layer after cooling；
B, PU foaming layer sprays: the lower mold being loaded with aluminium foil layer is transported to spraying area, and the aluminium foil layer in lower mold sprays PU foaming layer；
C, mold pressing EVA layer: after PU foaming layer has sprayed, the lower mold being loaded with aluminium foil layer and PU foaming layer is transported in the moulding press for being combined EVA layer, the upper mold of this moulding press has adsorption function, in advance by EVA layer sheet material to upper mold, the lower mold of aluminium foil layer to be loaded with and PU foaming layer carries the rear mold press matched moulds that puts in place, has molded the compound of EVA layer；
D, bonding XPE layer: the semi-finished articles bonding station of entrance after EVA layer has molded uses polyolefin hot-melt to carry out the bonding of XPE layer of sheet material；
E, Water Cutting: the cleaved molding of semi-finished articles that four structure sheafs are complex as a whole, form product piece.
The preparation method of car engine compartment insulation mat the most according to claim 1, it is characterised in that in described a step, aluminum liquid material feeding temperature is 710 DEG C-750 DEG C, and material feeding pressure is 0.06-0.15MPa；Upper mold temperature is 170 DEG C-190 DEG C, and lower mold temperature is 190 DEG C-230 DEG C；Pressurize 300-330s after aluminum liquid material feeding, die sinking natural cooling, it is down to 40 DEG C at a temperature of making aluminium foil surface.
The preparation method of car engine compartment insulation mat the most according to claim 2, it is characterised in that in described b step, quantity for spray controls in the 20g-80g/ second, and spray time controlled in the 1-5 second.
The preparation method of car engine compartment insulation mat the most according to claim 3, it is characterised in that described step a, b, c, d complete on three moulding presss, two spraying areas, two bonding stations；Described three moulding presss are referred to as a moulding press, No. two moulding presss, No. three moulding presss, wherein, No. two moulding presss are for noting the mold pressing for EVA layer of aluminum, a moulding press and No. three moulding presss, and three moulding presss share two structure lower molds identical, that be provided with material hole；No. two moulding presss are provided with liquid aluminium storage device, and liquid aluminium storage device is communicated with the air pipe line of air compression plant；The upper mold of a number moulding press and No. three moulding presss is equipped with the negative-pressure adsorption hole connecting negative pressure device；Described each spraying area is provided with spray robot.
The preparation method of car engine compartment insulation mat the most according to claim 4, it is characterised in that described step a, b, c, d are carried out according to following flow process:
1., by EVA layer sheet material to a moulding press upper mold and No. three moulding press upper molds；
2., No. two moulding presss note aluminum, after No. two moulding press matched moulds, compressed air is in air pipe line enters into liquid aluminium storage device, and aluminum liquid is slowly injected into No. two moulding press lower molds by material hole under pressure, and cooled, aluminium foil layer forms；
3., No. two moulding press lower molds forming aluminium foil layer are transplanted on the first spraying area, spray robot spray PU foaming layer to the aluminium foil layer of No. two moulding press lower molds；
4., PU foaming layer has sprayed in rear No. two moulding press lower molds move to No. three moulding presss by track the mold pressing carrying out EVA layer sheet material；Meanwhile moulding press lower mold enters into No. two moulding presss by track and carries out noting aluminum；
5., after EVA layer has molded in No. three moulding presss, semi-finished product enter the second bonding station, and to carry out XPE layer bonding, thus completes the making of first car engine compartment insulation mat semi-finished product；
6., a moulding press lower mold aluminium foil layer is transplanted on the second spraying area by track after forming, by spray robot to a moulding press lower mold aluminium foil layer spraying PU foaming layer；
7., PU foaming layer has sprayed in a rear moulding press lower mold moves to a moulding press by track and has carried out EVA sheet mold pressing；Meanwhile No. two moulding press lower molds are sent to No. two moulding presss and carry out noting aluminum；
8., after EVA has molded in a moulding press, semi-finished product enter the first bonding station, and to carry out XPE layer bonding, thus completes the making of second car engine compartment insulation mat semi-finished product；
Said process circulation is carried out.
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| CN104163019A (en) * | 2014-07-31 | 2014-11-26 | 天津博信汽车零部件有限公司 | Novel automobile thermal insulating cushion and manufacturing technique thereof |
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| CN106273746B (en) * | 2016-08-10 | 2018-09-21 | 广德天运新技术股份有限公司 | A kind of automobile engine sound insulating pad with shockproof effect |
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| CN106335256B (en) * | 2016-08-25 | 2018-09-21 | 广德天运新技术股份有限公司 | A kind of front cover for vehicle silencing pad with heat sinking function |
| CN106335253A (en) * | 2016-08-25 | 2017-01-18 | 广德天运新技术股份有限公司 | Vehicle engine thermal-insulation pad |
| CN107054234A (en) * | 2016-12-22 | 2017-08-18 | 江苏泛亚微透科技股份有限公司 | A kind of lightweight car door waterproof membrane part and its preparation technology with heat preservation and soundproof noise reduction capability |
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