Technical background
Popular along with automobile consumption in order to cut down the consumption of energy, requires to reduce as much as possible the total quality of automobile on the one hand; Riding on the other hand personnel pursue riding comfortableness, require inside gadget to have soft sense of touch and noise reduction effect.The thing followed is that automotive trim adopts foamed material to realize this two functions as liner more and more.Be to realize this purpose, a kind of method commonly used at present is first injection mo(u)lding thermoplastic resin skeleton, and spray glue or brush coating on skeleton then bond to polyurethane foam and surface fabric or leather on the thermoplastic resin skeleton again.There is following weak point in this method: 1) production stage is too much, or production line is long, causes the manufacturing cost height; 2) viscose glue is grown and the follow-up typing processing of needs hardening time; 3) bondingly may there be organic peculiar smell etc.And the another kind of manufacture method that may adopt is a low-pressure injection molding technology, and secondary compaction injection moulding or order pouring procedure, but the shortcoming of these two kinds of methods is, the temperature or the pressure that advance near the thermoplastic resin of glue point are still very high, and the low temperature PUR at the ornament materials back side is easy to be punctured by thermoplastic resin, forms local hard spot, particularly when containing low-density foam, after high heat thermoplastic resin is introduced into foam, form expendable collapsing on the surface, form waste product.
The utility model content
The utility model people is at existing problem in present goods and the technology, through overtesting, and molded goods with incrustation, manufacture method has surperficial high conformity, and it is short to have operation, and the advantage that efficient is high has proposed a kind of molded composite product.
The utility model purpose realizes being realized by following technical scheme:
Stratiform thing described in the utility model, structure comprises: but ground floor incrustation fabric or leather, second layer resilience foam material, the 3rd layer of nonwoven and the 4th layer of thermoplastic resin matrix who is made by thermoplastic resin material, connect for the 3rd layer, the 4th time according to the order of sequence ground floor, the second layer; Described the 4th layer of thermoplastic resin matrix's THICKNESS CONTROL is between 1.5mm-3mm; Described the 4th layer of thermoplastic resin matrix's core is a foaming structure, and core is that the cell diameter of foaming structure is accounting for 95% below 150 microns; But the thickness of described second layer resilience foam material is between 1 mm--5mm.
The utility model has the advantages that, by the selection of stratified material, and the organic assembling of pre-combination process of flame and molding process planning, make the product surface high conformity, have comfortable soft sense of touch and good anti-acoustic capability, manufacture method has the advantages that operation is short, efficient is high.
The specific embodiment
For illustrating in greater detail characteristics of the present utility model and advantage, the 1 pair of goods and manufacture method are described in detail in conjunction with the accompanying drawings.
As shown in drawings, label wherein: but 1--ground floor surface decoration, 2--second layer resilience foam material, 3--the 3rd layer of nonwoven, 4--thermoplastic resin matrix.
Embodiment 1
The cross section structure schematic diagram of the appearance surfaces part of automobile door plate middle part plug-in unit as shown in Figure 1, the outward appearance part in use can contact with human body.Ground floor is a surface decoration layer 1, according to the needs of decorated style, can select fabric for use, or the PVC leather, adopts the PVC leather in the present embodiment; But the second layer is a resilience foam material 2, can adopt polyurethane foamed material, perhaps cross-linked polyolefin foam, and crosslinked polyethylene foamed material for example, according to the needs of designer, select thickness at 1 mm to sense of touch--between 5 mm, density is at 30 kg/m
3--100 kg/m
3Between foamed material; Because this foamed material has suitable compressibility and good resilience, can make the goods after the moulding obtain soft feel, also make goods have better absorbing sound and lowering noise function; Adopt polyurethane foam material in the present embodiment, thickness is 4mm, and foam density is 55kg/m
3, the resilience index is less than 5% behind the pressurized; And the 3rd layer of nonwoven for making by thermoplastic resin, selecting grammes per square metre for use is every square metre 100 gram--the nonwoven of 200 grams, present embodiment adopts grammes per square metre to be about the poly-dioctyl phthalate second diester nonwoven of every square metre 170 gram, can with follow-up filling by melt bonds such as mineral or glass fibre filled polypropylene or acrylonitrile-butadiene-styrene (ABS) co-polymer (ABS) resins, also can stop the thermoplastic resin melt to enter into second layer sponge layer effectively.Material can directly obtain on commodity market in above-mentioned three; Before moulding, with the material selected by the broad-minded automotive fabrics in Changchun Co., Ltd with flame-treating process in advance with this first surface ornament materials 1(PVC leather), second layer sponge layer 2(polyurethane foam) and the 3rd strata dioctyl phthalate second diester nonwoven 3 compound in aggregates; Cut into needed shape then in advance, place then and be fixed in the mold cavity close die.To performance demands such as intensity, the 4th layer of thermoplastic resin matrix's material layer 4 chosen from comprise mineral or glass fibre filled polypropylene or acrylonitrile-butadiene-styrene (ABS) co-polymer resin according to goods, and thickness is between 1.5 mm-3 mm; Present embodiment adopts thick acrylonitrile-butadiene-phenylethylene copolymer (ABS) material of 2.3mm as the thermoplastic resin matrix; The ABS resin of plasticizing scheduled volume, press 0.3% of ABS resin plasticizing quality then--0.9% injects supercriticality nitrogen in molten resin, or 1%-3% injects the supercriticality carbon dioxide in molten resin; Inject 2% supercritical carbon dioxide in the present embodiment.Hybrid element by the screw rod rear portion fully mixes supercriticality carbon dioxide and ABS resin, forms homogeneous phase solution; Prepared homogeneous phase solution is expelled in the nonwoven of being made by thermoplastic resin and the die space between mold cavity or the core chamber; Cooling, die sinking, pickup obtains goods.
Embodiment 2
As embodiment 1, goods are identical automobile door plate middle part plug-in unit, and having than large tracts of land is appearance surfaces, and contacts with passenger or driver's hand.As different from Example 1, ground floor surface decoration layer 1 is a fabric; Be that second layer polyurethane foam material is identical with embodiment 1 below tissue layer 1; Be the 3rd strata dioctyl phthalate second diester (PET) nonwoven under polyurethane foam, identical with embodiment 1; And the 4th layer be 2.3 millimeters thick, 10% glass filled polypropylene matrixes, and be foaming structure at core, and wherein 95% cell diameter at 150 microns once.Ground floor tissue layer 1, second layer polyurethane foam 2,3-layer PET nonwoven 3 all obtain from commodity market, and are combined into one with flame in advance by the broad-minded automotive fabrics in Changchun Co., Ltd.Press on the goods and to decorate area and, after composite is cut in advance, put in the die cavity of mould and fix according to fixing needs; Plastify the acrylic resin that 10% glass is filled, press the overcritical nitrogen of adding in 0.4% the resin after fusing of resin quality, be mixed into homogeneous phase solution, this homogeneous phase solution is injected in the mould in the space between the nonwoven and die cavity; Cooling, the middle part plug-in unit is taken out in die sinking then.No matter embodiment 1 still is embodiment 2, and the decorative cover of the goods that obtain is full, softness, the hard thing of no local crowning.
Though below design and embodiment according to the utility model purpose have been done to elaborate with reference to accompanying drawing; but those of ordinary skills can recognize; under the precondition that does not break away from the claim limited range; still can make various improvement and conversion to the utility model, and this improvement and conversion still should belong to protection domain of the present utility model.