Car pneumatic flow guide exterior trimming plate injection molding method
A technology of injection molding and exterior decorative panels, which is applied in the direction of household components, household appliances, and other household appliances. It can solve the problems of unstable mold temperature, enterprise loss, large size of deflector, and inability to guarantee accuracy, etc., to achieve Improve product appearance, improve yield rate, improve flame retardancy and light aging resistance
Inactive Publication Date: 2019-01-15
TAICANG QIUJING PLASTIC MOLD
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Problems solved by technology
[0005] Auto deflectors have large dimensions and have high requirements on product appearance. The current production method of automobile deflectors often has defects: non-needle valve hot runner system is used for pouring, and it is difficult for this system to completely eliminate weld marks. ; Using experience to estimate the holding time and cooling time, the accuracy cannot be guaranteed, and the production efficiency is low; the injection molded parts are easily deformed due to the change of the mold temperature, and the defective products caused by the instability of the mold temperature bring huge losses to the enterprise
Method used
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preparation example Construction
[0038] Described melting glue preparation method comprises the following steps:
[0039] 1) Put carbon fiber, glass fiber, UP resin, polycarbonate, EVA resin, and polyetheretherketone into a pulverizer to pulverize the mixture for later use;
[0040] 2) Put polyurethane, graphite powder, nano-calcium carbonate, and talcum powder of formula quantity into the dryer to obtain mixture two for subsequent use;
[0041] 3) Put mixture 1 of step 1) and mixture 2 of step 2) into a blender and mix uniformly to obtain mixture 3 for later use;
[0042] 4) The mixture three is heated to a molten state to form a melt.
Embodiment 1
[0044] The speed of the pulverizer in the step 1) is 5000r / min, and the pulverization time is 20min.
[0045]In the step 2), the temperature of the pulverizer dryer is 100° C., and the drying time is 2 hours.
[0046] The melting temperature in the step 3) is 240°C.
Embodiment 2
[0048] The speed of the pulverizer in the step 1) is 6000r / min, and the pulverization time is 25min.
[0049] In the step 2), the temperature of the pulverizer dryer is 105° C., and the drying time is 3 hours.
[0050] The melting temperature in the step 3) is 280°C.
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The invention provides a car pneumatic flow guide exterior trimming plate injection molding method. According to the car pneumatic flow guide exterior trimming plate injection molding method, a needlevalve type hot runner is controlled through a sequence valve, the aim of adjusting and removing weld marks is achieved, and the product yield is improved; through arrangement of a joint line, the flowing manner of melt glue is changed, gas in a mold cavity is smoothly discharged, the mold cavity is filled with melt glue, the product appearance is improved, and the product yield is improved; polycarbonate which is high in strength, resistant to fatigue, and good in size stability is adopted, unsaturated polyester (UP resin), carbon fibers, glass fibers and polyether-ether-ketone with high glass transition temperature are assisted, meanwhile, other filling materials like EVA resin are added, the structure wear resistance is improved, graphite powder can improve material fire resistance andlight aging prevention, through optimized combination of components, synergistic interaction is achieved, material stability is ensured, the structural strength is high, and the service life is long.
Description
technical field [0001] The invention relates to the technical field of processing methods for automobile deflectors, in particular to an injection molding method for automobile aerodynamic deflector exterior trims. Background technique [0002] With the improvement of living standards and the acceleration of the pace of life, automobiles have become an indispensable means of transportation in life. When automobiles are widely popularized, people have put forward higher requirements on the performance of automobiles, especially in terms of safety performance. [0003] In aerodynamics, the French physicist Bernouyi proved that the speed of air flow is inversely proportional to the pressure. That is to say, the faster the air velocity, the lower the pressure; the slower the air velocity, the greater the pressure. For example, the upper part of the wing of an airplane is a positive parabola, and the airflow is faster; Pressure creates lift. [0004] In the field of automobile ...
Claims
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IPC IPC(8): B29C45/00B29C45/28B29C45/78B29L31/30
CPCB29C45/0005B29C45/0025B29C45/2806B29C45/78B29C2945/76531B29L2031/3005
Inventor 仇军成
Owner TAICANG QIUJING PLASTIC MOLD