CN103260843A - Process for producing surface-finished lightweight components with high natural fibre content and integrated fastening elements - Google Patents
Process for producing surface-finished lightweight components with high natural fibre content and integrated fastening elements Download PDFInfo
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- CN103260843A CN103260843A CN201180058357XA CN201180058357A CN103260843A CN 103260843 A CN103260843 A CN 103260843A CN 201180058357X A CN201180058357X A CN 201180058357XA CN 201180058357 A CN201180058357 A CN 201180058357A CN 103260843 A CN103260843 A CN 103260843A
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- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1671—Making multilayered or multicoloured articles with an insert
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- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
- B29C2045/14286—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure means for heating the insert
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- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
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- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
- B29C45/14786—Fibrous material or fibre containing material, e.g. fibre mats or fibre reinforced material
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- 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
- B29K2311/00—Use of natural products or their composites, not provided for in groups B29K2201/00 - B29K2309/00, as reinforcement
- B29K2311/10—Natural fibres, e.g. wool or cotton
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
A process is described for producing a lightweight component comprising natural fibres (FRP component), which has a visible side and a fastening side. In order to manufacture a lightweight FRP component with a high degree of design freedom, any desired type of surface, and substantially reduced cost for downstream operations, the following production steps are proposed according to the invention: a) insertion of a semifinished natural fibre product into an injection mould, b) a pressing and/or forming process, and also consolidation of the semifinished natural fibre product, to give a moulding in the injection mould, c) injection to add functional elements, in particular fastening elements, and/or reinforcing structures, onto the moulding on the fastening side of the lightweight component, into unoccupied spaces in the injection mould, the functional elements, in particular the fastening elements and/or the reinforcing structures being injected only onto a portion of the area of the fastening side, and d) applying the surface component in a prescribed region of the visible side of the moulding.
Description
Technical field
The present invention proposes a kind of method for the manufacture of light member, and described light member has high natural fiber share and the surface that machines.In addition, also introduce a kind of device for the described method of enforcement.Such member is preferably applied in the middle of the automobile making.
Background technology
The natural fiber reinforced plastics member (hereinafter being also referred to as the NFK-member) of automotive trim is to be that mainly make with pressing on the basis with planar semi-finished product mostly.Can obtain percentage by weight at this is the natural fiber share more than 80%, low density of material and high structural property value.Compare with injection moulding, the moulding free degree of press members considers the partial structurtes rigidity and is subjected to severely restricts, for example because the enforcement of reinforcement and retaining element, as keeping body (Retainer).In addition, the conversion of soft-surface generates and need carry out follow-up member coating processing.Though injection molding technology can be realized almost not having the moulded parts geometry of limitation and realize the surface coating processing by one-stage process, but, for the processing of natural fiber reinforced plastics, clearly restriction is but arranged aspect the odor dispersion that natural fiber share, height dynamic structure characteristic and temperature conditions determine can reaching.In addition, density of material is also apparently higher than the NFK-press members.
DE10327725A1 has introduced a kind of method, in the method, applies mobile plastics materials by the member side at decorative layer and makes a composite component, and described plastics materials is loaded with expandable gas.Plastics materials is introduced in the die cavity and reduces to cause by pressure and makes gas begin to expand and make original single-phase plastics materials expand into the plastic foam of porous, and this plastic foam is full of die cavity fully.
DE10341855A1 discloses a kind of method for manufacturing component, and it is 70% fiber, particularly natural fiber up to percentage by weight that this member can contain share.Described member is made of plastic foam simultaneously, and this plastic foam is covered with decorating film.Manufacture process is as follows: use a kind of ventilative decorative layer, and plastics are got at decorating film back foaming in mould.Unnecessary gas can pass decorating film and discharge process chamber valuably.Preferably by realize this foaming of plastics based on the chemical blowing of the reaction that produces gas.
Introduced a kind of decoration or liner plate spare for vehicle interior compartment in DE202007007498U1, this decoration or liner plate spare have a ductile laying.In order to make, decorative layer and ductile laying are added into a mould, and the middle cavity between decorative layer and the ductile layer is filled with plastics.Ductile layer preferably should by weaving or preimpregnation material form.
DE102004054228A1 discloses a kind of method and apparatus for the manufacture of composite component, wherein, produce moulded parts by the blank that contains natural fiber by the extruding to described blank, and functor is by being integrally formed on the described moulded parts on the side that plastic melt is injected at moulded parts.Functor is used at the fixing loudspeaker of a side of moulded parts.Attached loudspeaker grid is installed on the opposite side of moulded parts.
The prior art of quoting shows: in auto industry, reduced weight by foaming chemistry or physics in the scope of liner plate spare, and some function element can get in injection moulding.Yet bubble generation member has the higher technical process control of expense and can cause lower impact flexibility under most of situation.
Summary of the invention
So the objective of the invention is, providing a kind of for the efficient method of making light member, this method can be made surface and the obvious light-duty NFK-member that reduces of finished machined cost that has the very high moulding free degree, has the arbitrary characteristics performance.
According to the present invention, above-mentioned purpose is achieved by the method for claim 1.The useful design of this method is set forth in returning the dependent claims that draws.
By the process combination, the present invention has utilized the advantage of compact technique, injection molding technology and coating technology.At this, each process is combined in the process.Useful especially is, both can also can realize processing operation with standard device with standard semi-finished product (natural fiber semi-finished product), for example with having heavy limit mould (Tauchkantenwerkzeug), have turntable, have the feeding workbench or having the injection (mo(u)lding) machine of rotating disk.
For this reason, this method regulation has the following step:
A) natural fiber semi-finished product (semi-finished product) are inserted in the injecting molding die,
B) in injecting molding die with the extruding of natural fiber semi-finished product and/or shaping and fixed and become moulded parts,
C) in the free space in injecting molding die, function element, particularly retaining element and/or reinforcement structure are expelled on the moulded parts in the fixation side of light member, wherein, described function element, particularly retaining element and/or strengthen on the part on surface that structure only is injected at fixation side
D) in the presumptive area of the viewable side of moulded parts or light member, apply (coating) surface component.
We can say according to step b) and to have produced the moulded parts that has two sides.A side constitutes fixation side, and the another side then constitutes viewable side.Step c) relates to fixation side, and step d) relates to the viewable side of moulded parts.Like this, surface component is applied on the side that deviates from function element of moulded parts.Finish the light member that (surface finish) handled on the surface eventually, the surface that this light member has function element and has completion in another side a side so as a result of just produced.There is no need to carry out again finished machined or follow-up surface treatment.
Hereinafter, be generally cushion structure, the natural fiber share preferably percentage by weight be between 30% and 100%, be that textile material between 40% and 90% is called as the natural fiber semi-finished product particularly preferably in percentage by weight.Remaining share of percentagewising is made of packing material such as particle or staple fibre and melting fiber.Preferred especially two kinds of semi-finished product flexible programs that propose here:
-have thermoplasticity parent (melting fiber) and percentage by weight and be a semi-finished product structural form of the expansion of 50% natural fiber share;
-have percentage by weight and be a semi-finished product flexible program of 100% natural fiber share, wherein Fan Ying matrix resin (thermosetting plastic) before being about to be shaped just coated (spraying) to the base pad.
This method preferably in injection (mo(u)lding) machine, particularly preferably in implementing in the turntable type injection (mo(u)lding) machine.Can certainly use the injection (mo(u)lding) machine that has the feeding workbench or have rotating disk.
According to the present invention, process natural fiber semi-finished product pretreated, that be also referred to as component 1 are placed in the mould (injecting molding die) and by blocking force (mold clamping force) and are extruded and/or shaping and the fixed moulded parts that becomes.The moulded parts of Gou Chenging has formed light structures grade component holder high, compacting like this.
Next partly injection moulding function element, particularly retaining element are such as keeping body and/or strengthening structure example such as rib (being also referred to as component 2).One preferred embodiment in, the injection with the compacting carry out simultaneously or after certain extruding retention time, just begin in mould, to carry out.So the compacting of moulded parts is carried out simultaneously or is partly carried out simultaneously with injection.
In next step, coating surface component on the viewable side of composite component (being also referred to as component 3), this surface component on viewable side by the corresponding preparation of the die surface that is shaped being handled and can being obtained predetermined arbitrarily texture structure (for example leather outward appearance) and can give the desired feel of component surface (for example flexible touch effect) and/or very high scratch resistance intensity.
Therefore produced valuably a kind of three-dimensional, finish surface composite component that handle, that natural stress is very little and shape stability is high eventually.Therefore this composite component need not further procedure of processing just can be for further using.This composite component can be directly installed on one for this reason on the set member.
As the natural fiber in the natural fiber semi-finished product, the preferred use as wood fibre, hemp, flax fiber, coir fibre, sisal fiber etc. material or the mixture of natural fiber in addition.The natural fiber semi-finished product preferably have a kind of definite melting fiber share.This melting fiber share preferably is in 30% to 50% the scope in percentage by weight is 10% to 70% scope and particularly preferably in percentage by weight.At this, melting fiber preferably has polypropylene as the fusing component.One preferred embodiment in, semi-finished product were handled through temperature adjustment before inserting mould.The preferred use contacts heating or heat radiator device for this reason.In this temperature that adopts with depend on the half-finished constituent of natural fiber heat time heating time and particularly depend on simultaneously kind and the share that melts component.The purpose that temperature adjustment is handled is the fusing component is changed into fluid or semi-fluid condition from solid state.This fusing component is evenly distributed in the composite construction and with reinforcing fibre under the extruding force effect and surrounds and cling.After fixed by the cooling realization, this fusing component just becomes the parent of composite.
One preferred embodiment in, the natural fiber semi-finished product were made the specification that (being divided into) needs in batches before inserting.Preferably implementing this by stamping-out or shearing cuts apart/separates.Another preferred embodiment in, mould combines with a blanking apparatus, thereby the half-finished blank cutting of natural fiber is integrated in the pressing process.
Another preferred embodiment in, use the natural fiber semi-finished product of thermosetting adhesive to carry out processing and manufacturing.For this reason, the natural fiber semi-finished product sprayed with reacting resin (matrix resin) (being preferably polyurethane) before inserting mould or flood (for example padding in the technical process) with hardenable matrix resin (polyacrylate resin) in the infiltration ponds.
Along with closing of mould and applying of blocking force, the natural fiber semi-finished product are formed and push.Described mould preferably has additional Thermal Control Element, and this process is accelerated.In order to process the heat adhesiveness compound parent, this Thermal Control Element is constructed to heating element heater.And using by the PP(polypropylene) or the material of other deliquescing in molten state or a kind of situation that the melting fiber that fixed surface component (TPE) constitutes takes place by cooling under, then should set the Thermal Control Element form of cooling effect.
Shorten the necessary press time in this way valuably and shortened net cycle time thus.
Function element, particularly retaining element (maintenance body) and/or reinforcement structure are injected moulding in the following way: the material of these function element is injected the free space in the mould or its free space in mould is expanded.In this case, the free space in the mould is filled.Therefore unlike the prior art be that the natural fiber semi-finished product are injected on whole surface behind, thereby make required blocking force be able to obvious reduction valuably.One preferred embodiment in, the free space in the mould is shaped and just exists during extruding at the natural fiber semi-finished product.In this way, retaining element and/or strengthen the semi-finished product zone that structure should be fixed thereon and avoid the extruding force effect valuably, thereby, the half-finished surface of natural fiber be open wide micropore and keep coarse valuably.In addition, in these zones, the natural fiber semi-finished product are not subjected to so strong cooling or keep the warm of long period.The material and half-finished firm connection of natural fiber that have guaranteed to keep the material of body so valuably and/or strengthened structure.By injection pressure/pushing tow pressure (Nachdruck), the natural fiber semi-finished product also are compressed in these positions.By injected plastic during natural fiber semi-finished product consolidation process, optimum engagement and small member torsional deformation have been realized.In principle, Cai the free space in the mould can also keep closed state temporarily earlier and be vacated (opening) in order to carry out injection moulding when shaping and extruding, for example pass through to use suitable sliding component.Though abandoned the above-mentioned advantage such as unlimited micropore thus, realized extruding and fixed more uniformly but then thus.
Another preferred embodiment in, by making the mobile interior free space of mould that produces of corresponding each mould part (for example mold halves or sliding component).If keep the body material and/or strengthen structural material identical with the material of melting fiber share in the natural fiber semi-finished product or can realize being connected very closely with this material, then realized maintenance body and/or reinforcement structure and half-finished exceptionally close connection of natural fiber at this.
According to specific requirement, preferably use thermoplastic, elastomer, thermoplastic elastomer (TPE) (TPE) or also have thermosetting plastic as the material that keeps body and/or reinforcement structure.
Preferably the butt by heavy limit mould moves or is provided at by interchangeable mold halves or interchangeable mold insert and is the required free space of coating surface component (component 3) in the mould cavity.This free space is so big, namely can form the coating of desired thickness in the presumptive area in the viewable side of member.Therefore this point depend on setting material layer thickness and for the thin coat of paint, be preferably value between 0.1mm and 1mm, be preferably 0.4mm to 0.6mm especially.For thicker layer, preferably be set to 1mm to 20mm, be preferably about 2-10mm especially.Heavy limit mould generally is a kind ofly can change the mould of cavity size by half module relatively moving to each other.Particularly, heavy limit mould can be a kind of mould that has so-called heavy limit (Tauchkante), by this heavy limit, and immigrations that be nested mutually of formpiston and former, mould is just by around sealing, and the while can also be realized the depth adjustment to cavity.
Another preferred embodiment in, by open mould and member is transferred in another cavity or by the half module that is equipped with member and another half module are gathered be formed for component 3, namely be used for the free space of surface component.For example adopt so-called turntable technology or so-called feeding workbench technology or so-called rotating disk technology for this reason.The injection (mo(u)lding) machine that comprises turntable technology, feeding workbench technology and rotating disk technology is known to those skilled in the art, does not therefore repeat them here.
Preferred adopt mobile material as component 3, this material or when cooling or the crosslinked dimensionally stable that becomes by reactive component.Component 3 is preferably layer of polyurethane or the PU-coat of paint with flexible touch effect.Wherein, this flowable materials also can be rarer aqueous, for example watery reaction japanning system (Reaktiv-Lacksystem).The adding of surface component has realized possessing a kind of predetermined outward appearance and feel after sclerosis.
As component 3, also preferably inject the TPE(thermoplastic elastomer (TPE) in addition) or as possibility adding polyurethane or materials similar, as expandable polypropylene.The reaction time of surface component is depended on employed surface component material, for the PU-system preferably between about 40 and 180 seconds.
Surface component coated (applying) is in the presumptive area of the viewable side of moulded parts.This presumptive area can be whole viewable side or also can only be one or more part in the whole viewable side.
When adding surface component, can shorten net cycle time valuably by additional heating element heater.
Cancelled finished machined or only need to remove gate system and realized member near final profile, this can be considered as an important advantage of the inventive method.
Another preferred embodiment in, after the coating surface component, namely after for example using the TPE/PU coating and thus outside employed injecting molding die for this reason, just the member that comprises the natural fiber semi-finished product is carried out cutting.
This method another preferred embodiment in, in the surface of member visible surface, add a decorating film and in pressing process, couple together with the base pad in that natural fiber is half-finished.In constituting the processing step of surface component, in the steps d of method according to claim 1, pour into polyurethane-japanning system valuably.Therefore, that be provided with decorating film and thereby can be described as " being covered with film " member and soak the filling colored varnish with being attached.In this way, can realize a kind of corresponding outward appearance at the composite component of completion.For example, can carry out coating to decorating film or the coverlay that is printed as tree knot outward appearance (Wurzelholzoptik) with anti-stroke of lacquer.
Another is preferred embodiment stipulated: use the component more than three and for example after sclerosis surface component is carried out stamp or sketches the contours profile.Preferably in the process of steps d, constitute a plurality of stacked layer of surface component.
The device that is used for enforcement this method has first mold halves and second mold halves, and these mold halves constitute the cavity of lockings and pre-determined the shape of the light member of pursuing.First mold halves has free space, the material that these free spaces are suitable for holding retaining element and/or strengthen structure.Free space can link to each other with one or more material hold-up vessel that is used for the material of retaining element and/or reinforcement structure, and wherein, this material can be injected under pressure.One preferred embodiment in, but in the mold halves one or two are temperature adjustments.Preferably use a kind of resistive heating device that is integrated in the mold halves for this reason.One preferred embodiment in, the part of first mold halves is movably, thereby during pressing process or just form free space afterwards.Under the situation of heavy limit mould, its whole relative first mold halves of second mold halves and the semi-finished product that are placed into are removable, perhaps under the situation of rotary mold, feeding workbench mould or rotating disk mould, can change, in order to produce a free space, the whole viewable side of the open moulded parts in this free space degree like this ground, that is, make the amount of necessity of surface component can be added in this free space.The preferred turntable type injection (mo(u)lding) machine that uses, its mould has the grasping element for clamping natural fiber semi-finished product base pad.Therefore this method preferably is implemented on the so-called horizontal injection make-up machine, that is to say that semi-finished product are between the half module of opening that is placed into injecting molding die under the vertical basically location status.Particularly in the situation of using the turntable type injection (mo(u)lding) machine, can on the both sides of turntable, carry out forming process simultaneously.
Two mold halves can be utilized pressure to be nested mutually and be pressed into, wherein produce pressure by the unit according to prior art.For example use the hydraulic drive mechanism of injection (mo(u)lding) machine for this reason.
Description of drawings
Hereinafter will elaborate the present invention by embodiment and with reference to Fig. 1 and 2.In the accompanying drawing:
Fig. 1 is to utilizing heavy limit mould or utilization to have the explanation of method of the mould of replaceable half module;
Fig. 2 is the explanation to the method for utilizing the turntable type injection (mo(u)lding) machine.
The specific embodiment
Shown in Figure 1 is general process schematic flow sheet, as described in the claim 1.Step 1 shows the preparation of the semi-finished product (1) between second mold halves (5) on first mold halves (4) in semi-finished product left side and semi-finished product right side.In step 2 the natural fiber semi-finished product (1) in (comprising first and second mold halves) injecting molding die are implemented extruding, wherein, two half modules, two mold halves in other words move relative to each other.Step 3 comprises carries out behind as the natural fiber semifinished material that particularly keeps body and/or strengthen the position of structure and injects being provided with function element.Function element, the plastic material (2) that particularly keeps body and/or strengthen structure are filled the cavity of first mold halves.Since in the zone of the cavity that is used for component (2) natural fiber semi-finished product (1) do not suffer the extruding force effect and thereby the there also not fixed fully, therefore in injection process, can reach a kind of extraordinary connection by the material joint; The plastic material (2) of injection can enter in the fiber semi-finished product in these zones.In step 4, in order to provide free space for surface component (3) in presumptive area, second mold halves (5) returns slightly and removes-as in the situation of heavy limit mould-or be replaced by another and have the mold halves of mating cavity.Surface component (3) is added in this free space then.
Intend the technological process of turntable type injection (mo(u)lding) machine is set forth by Fig. 2.
By pre-temperature adjustment to about 200-230 ℃ natural fiber semi-finished product base pad (for example flax fiber/polypropylene 50/50) by manipulator (11) from heating station (12) (herein being hot press) in taking-up and the mould that suspends (14).Then by the attached mould closed pair semi-finished product on mould (14) and the turntable (16) are pushed.After the delay time of determining in for example 10 seconds, the natural fiber semi-finished product base pad of shaping by injection unit (15) by injection of plastic material (for example polypropylene) behind partly.Preferably carry out behind injection as follows, that is, make plastic material pass semi-finished product or by turning part, a melt canal be injected in the mould on the turntable (16) in the cavity of turntable side.Be in one between the mould of semi-finished product and turntable (16) in the formed cavity so be injected function element that moulding gets on simultaneously as keeping body and/or strengthening structure.The viewable side of moulded parts deviates from turntable (16).Meanwhile, by manipulator (11) next semi-finished product are inserted in the heating station (12) from semi-finished product stacking (13).After the reaction time of having experienced surface component (even also will follow this reaction time in the equipment initial launch step (Einfahrschritt) of Cun Zaiing here, because just will be on the opposite side of turntable in next continuous process surface component be added), mould (14) be opened and turntable (16) together with through the press members Rotate 180 of injection behind °.In next step, manipulator (19) adds releasing agent in the mold halves (17) and manipulator (11) will be through the semi-finished product base pad of temperature adjustment in the heating station (12) in taking-up and the mold halves that suspends (14) simultaneously.After the mould closure, in mold halves (17), utilize polyurethane-system to soak the filling press members, described polyurethane-system constitutes surface component (3) by a mixing head (18), and (the PU-system is here: Elalstolit R8919/100/WE35, Iso134/7), and simultaneously in mold halves (14), semi-finished product base pad is suppressed and injection behind.Meanwhile, next semi-finished product are placed in the heating station (12).After having experienced for example 45 reaction time in second of employed polyurethane-system, mould is opened and the member that machines is taken away by manipulator (19).Then, Rotate 180 ° and releasing agent are added in the mold halves (17) turntable (16) again.This process repeats arbitrarily repeatedly.
Can also stipulate in the Variant Design of above-mentioned technical process: the viewable side of moulded parts is positioned on the side of rotary mold and the used plastics materials of function element is injected at half-finished on that side of mould (14) or injection unit (15).Then, after turntable (16) rotation, in rotary mold, itself should produce a cavity that is used for polyurethane-system, for example by suitable sliding component etc.In this case, polyurethane-system supplies with by mould (17), but supplies with by the half module that is positioned on the turntable (16).For this reason, the device that makes mixing head (18) and this half module dock and be lifted away from can be set in a suitable manner.
Reference numerals list
1 natural fiber semi-finished product
2 keep the material of body, and/or strengthen structure
3 surface components
4 first mold halves
5 second mold halves
11 manipulators-people operates machine
12 heating stations
13 natural fiber semi-finished product stackings
14 first mold halves
15 injection units
16 turntables
17 second mold halves
18 mixing heads
19 manipulators-people operates machine
Claims (14)
1. for the manufacture of the method for light member, this light member has viewable side and fixation side, it is characterized in that comprising following manufacturing step:
A) the natural fiber semi-finished product are inserted in the injecting molding die,
B) in injecting molding die with the extruding of natural fiber semi-finished product and/or shaping and fixed and become moulded parts,
C) in the free space in injecting molding die, function element, particularly retaining element and/or reinforcement structure are expelled on the moulded parts in the fixation side of light member, wherein, described function element, particularly retaining element and/or strengthen on the part on surface that structure only is injected at fixation side
D) in the presumptive area inside coated surface component of the viewable side of moulded parts.
2. each described method of claim as described above is characterized in that described natural fiber semi-finished product have definite melting fiber share.
3. method as claimed in claim 1 or 2 is characterized in that, if contain the situation of melting fiber share at semi-finished product, then particularly utilizes contact heating or heat radiator to carry out pre-temperature adjustment before inserting to the natural fiber semi-finished product among the step a.
4. the method for claim 1 is characterized in that, if the natural fiber semi-finished product do not have melting fiber, then these natural fiber semi-finished product are flooding with matrix resin in the infiltration pond before the step a or having matrix resin by spraying.
5. the method for claim 1 is characterized in that, described natural fiber semi-finished product are thermosetting adhesives.
6. each described method of claim as described above is characterized in that step b and c carry out simultaneously or partly carry out simultaneously.
7. each described method of claim as described above is characterized in that, step b is accelerated by additional heating or by cooling according to the half-finished constituent of natural fiber.
8. each described method of claim as described above is characterized in that, step b is with separation process, particularly the stamping-out process combines.
9. each described method of claim as described above is characterized in that, constitutes free space by following manner in step c in injecting molding die: the each several part of mobile injecting molding die and vacate free space thus after step b.
10. each described method of claim as described above is characterized in that: in order to carry out steps d light member is moved in second cavity.
11. as each described method of claim 1 to 9, it is characterized in that: the part of mobile injecting molding die in order to carry out steps d, and vacate a free space in the viewable side of light member thus, surface component can be added in this free space.
12. the described method of each of claim as described above is characterized in that: steps d is accelerated by additional heating or by cooling according to the constituent of surface component.
13. the described method of each of claim as described above, it is characterized in that: described natural fiber semi-finished product are provided with the decorating film towards the viewable side of light member, and the surface component in steps d is the japanning system.
14. the described method of each of claim as described above, it is characterized in that: described natural fiber semi-finished product are provided with the same or different surface component of multilayer in viewable side.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010063751A DE102010063751A1 (en) | 2010-12-21 | 2010-12-21 | Process for the production of surface-processed lightweight components with high natural fiber content and integrated fasteners |
| DE102010063751.3 | 2010-12-21 | ||
| PCT/EP2011/073568 WO2012085070A1 (en) | 2010-12-21 | 2011-12-21 | Process for producing surface-finished lightweight components with high natural fibre content and integrated fastening elements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103260843A true CN103260843A (en) | 2013-08-21 |
Family
ID=45463579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180058357XA Pending CN103260843A (en) | 2010-12-21 | 2011-12-21 | Process for producing surface-finished lightweight components with high natural fibre content and integrated fastening elements |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2655035A1 (en) |
| CN (1) | CN103260843A (en) |
| DE (1) | DE102010063751A1 (en) |
| WO (1) | WO2012085070A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2012085070A1 (en) | 2012-06-28 |
| EP2655035A1 (en) | 2013-10-30 |
| DE102010063751A1 (en) | 2012-06-21 |
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Application publication date: 20130821 |