A kind of arrangements for automotive doors inside gadget uses the method for the adhesive surface composite leather containing modification infusorial earth
Technical field
The invention belongs to a kind of Manufacturing Technology for Automotive Parts field, specifically a kind of arrangements for automotive doors inside gadget uses the method for the adhesive surface composite leather containing modification infusorial earth.
Background technology
Have knit fabric or leather etc. in the decorative material on current arrangements for automotive doors surface, the moulding process of product is mould pressing process or low-pressure injection molding technology.During mold pressing, many employings first cut cloth, mold pressing bound edge again, cutting technologist uses maximum, the methods of everyone cutting are different, so the uniformity of product cannot ensure, the production efficiency of mould pressing process is low, and defect rate is high, use artificial quantity large, the whole production procedure from semi-finished product to finished product is complicated.And the high cost of low-pressure injection molding technology, equipment investment is large, requires high to the extension of leather.
Summary of the invention
The object of this invention is to provide a kind of method that arrangements for automotive doors inside gadget uses the adhesive surface composite leather containing modification infusorial earth.
Technical solution of the present invention is as follows:
Arrangements for automotive doors inside gadget uses a method for the adhesive surface composite leather containing modification infusorial earth, it is characterized in that: comprise the following steps:
(1), by diatomite concentration be that the hydrochloric acid solution of 10-12% soaked after 6-8 hour, then spend deionized water to neutral, dry;
Diatomite after drying is calcined 5-8 hour at 500-600 DEG C;
Add in diatomite after firing and be equivalent to the epoxy cotton seed oil acid butyl ester of its weight 1.8-2.2%, the a-cyanoacrylate of 1.5-2.3%, stir 30-40 minute under 3500-4500 rev/min after, oven dry grinds to form nanometer powder, obtains modification infusorial earth for subsequent use;
(2), by rice hull ash concentration be that the hydrogen peroxide solution of 13-15% soaked after 5-7 hour, then spend deionized water to neutral, dry;
Add in rice hull ash be after the drying equivalent to its weight 1-2% epoxidized soybean oil, 2-3% a-cyanoacrylate, stir 30-40 minute under 3500-4500 rev/min after, dry grind to form nanometer powder, obtain modification rice hull ash for subsequent use;
(3), kneader is preheated to wall temperature 190-205 DEG C;
Then add EVA, epoxy resin, C5 Petropols, dimethyl carbonate, silane coupler KH560, ferrocene, n-BMA, antioxidant 264 by weight, mediate 40-60min;
After add surplus stock by weight, at 160-180 DEG C, mediate 30-50min, take out and to cool and to obtain binding agent for subsequent use;
Described binding agent is obtained by the raw material of following weight parts:
EVA57-62, epoxy resin 8-12, C5 Petropols 12-16, microwax 3-5, WPP type polypropylene wax 0.5-1, dimethyl carbonate 1-2, Nano celestite powder 2-4, modification infusorial earth 7-10, modification rice hull ash 2-3, silane coupler KH5601.3-1.6, ferrocene 0.2-0.4, n-BMA 0.3-0.6, epoxidized soybean oil 0.4-0.6, antioxidant 264 0.4-0.6, antioxidant 6160.2-0.4; Antioxidant 3330.2-0.4;
(4), the inside gadget surface spraying binding agent of composite leather is being needed;
(5), by inside gadget to be positioned in counterdie on boss fixing, and to be provided with the annular cavity holding upper die-cutting rule outside counterdie boss around inside gadget;
(6), the leather of rolling be pulled to boss place and cover on inside gadget;
(7), patrix presses down, and applies pressure 20-25Mpa, and patrix die head lower surface coincide with inside gadget surface configuration, and leather compression is fitted in inside gadget surface, molding cycle 10-15 second, pressurize 10-15 second;
(8), employing is manual cuts the unnecessary leather of inside gadget periphery; Or in composite leather process, patrix die head periphery is provided with the cutting knife of elastic telescopic, cutting knife sinks, and extend in described annular cavity, the leather that excision inside gadget periphery is unnecessary;
(9), patrix resilience, take out be compounded with leather upholstery part, manually bound edge is carried out to unnecessary leather, to obtain final product.
Described arrangements for automotive doors inside gadget uses the method for the adhesive surface composite leather containing modification infusorial earth, it is characterized in that: described EVA is SUMITOMO CHEMICAL KA-31.
Beneficial effect of the present invention is: compared to the prior art, the present invention adopts mould pressing process, automatic trimming, efficiency is high, simultaneously, adopt particular adhesive, the raw materials of binding agent contains modification infusorial earth etc., and adhesion strength is high, is highly suitable for arrangements for automotive doors surface recombination leather, composite effect is smooth, and Long-Time Service can not bubble.
Accompanying drawing explanation
Fig. 1 is mould structure schematic diagram of the present invention.
Detailed description of the invention
See accompanying drawing, mould of the present invention includes patrix 6, counterdie 4, counterdie 4 has and places fixing boss 1 for inside gadget 3, inside gadget 5 is stained with leather, and on counterdie 4, boss 1 periphery is surrounded with the annular cavity 2 holding upper die-cutting rule 3; Upper die-cutting rule 3 is loop configuration, and slip cap is contained in patrix 6 die head periphery, by being arranged on the other driving mechanism on patrix 6, promotes the motion of patrix 6 cutting knife to realize cutting function.Above-mentioned upper die-cutting rule 3 structure also can not be established, and adopts artificial cutting edge.Mould of the present invention has left and right two boss, can carry out the composite leather of two different structure inside gadgets 5 simultaneously.
Arrangements for automotive doors inside gadget uses a method for the adhesive surface composite leather containing modification infusorial earth, comprises the following steps:
(1), by diatomite concentration be 12% hydrochloric acid solution soak 6 hours after, then spend deionized water to neutral, dry;
Diatomite after drying is calcined 5 hours at 500 DEG C;
Add in diatomite after firing and be equivalent to the epoxy cotton seed oil acid butyl ester of its weight 1.8%, the a-cyanoacrylate of 2.3%, stir after 30 minutes under 4500 revs/min, dry and grind to form nanometer powder, obtain modification infusorial earth for subsequent use;
(2), by rice hull ash concentration be 15% hydrogen peroxide solution soak 5 hours after, then spend deionized water to neutral, dry;
Add in rice hull ash be after the drying equivalent to its weight 2% epoxidized soybean oil, 3% a-cyanoacrylate, stir after 30 minutes under 4500 revs/min, dry and grind to form nanometer powder, obtain modification rice hull ash for subsequent use;
(3), kneader is preheated to wall temperature 205 DEG C;
Then add EVA, epoxy resin, C5 Petropols, dimethyl carbonate, silane coupler KH560, ferrocene, n-BMA, antioxidant 264 by weight, mediate 60min;
After add surplus stock by weight, at 180 DEG C, mediate 50min, take out and to cool and to obtain binding agent for subsequent use;
Described binding agent is obtained by the raw material of following weight parts (kg):
SUMITOMO CHEMICAL KA-31EVA57, epoxy resin E4412, C5 Petropols 16, microwax 5, WPP type polypropylene wax 1, dimethyl carbonate 2, Nano celestite powder 3.5, modification infusorial earth 10, modification rice hull ash 3, silane coupler KH5601.3, ferrocene 0.4, n-BMA 0.6, epoxidized soybean oil 0.6, antioxidant 264 00.6, antioxidant 6160.4; Antioxidant 3330.4;
(4), the inside gadget surface spraying binding agent of composite leather is being needed;
(5), by inside gadget to be positioned in counterdie on boss fixing, and to be provided with the annular cavity holding upper die-cutting rule outside counterdie boss around inside gadget;
(6), the leather of rolling be pulled to boss place and cover on inside gadget;
(7), patrix presses down, and applies pressure 25Mpa, and patrix die head lower surface coincide with inside gadget surface configuration, and leather compression is fitted in inside gadget surface, molding cycle 10 seconds, pressurize 14 seconds;
(8), employing is manual cuts the unnecessary leather of inside gadget periphery; Or in composite leather process, patrix die head periphery is provided with the cutting knife of elastic telescopic, cutting knife sinks, and extend in described annular cavity, the leather that excision inside gadget periphery is unnecessary;
(9), patrix resilience, take out be compounded with leather upholstery part, manually bound edge is carried out to unnecessary leather, to obtain final product.
Through actual verification, combined efficiency increases by 2 times, and single-piece reduces 3-4 manually, and economic benefit is obvious.
The apparent viscosity of the binding agent of the present embodiment is 4900MPa.s, peel strength 149N/2.5cm, and initial bonding strength reaches No. 5 steel balls, softening point 137 DEG C, open hour 36s, and within 24 hours, thermally-stabilised proterties is stablized.