Manufacturing process of car lamp reflector

A manufacturing process and reflector technology, applied in the direction of coating, etc., can solve the problems of poor heat resistance, arc resistance, poor electrical performance, and low specific strength, and achieve excellent arc resistance, excellent electrical properties, and good thermal expansion Effect

Inactive Publication Date: 2016-03-02
刘平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Today's cars at home and abroad generally use parabolic special-shaped headlights and free-form headlight reflectors. The traditional steel stamping process cannot process lighting distribution lines and light-dark cut-off lines on reflectors, and has low specific strength, poor electrical properties, and durability. Thermal arc resistance is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The invention discloses a manufacturing process of a car lamp reflector, which is characterized in that the material is a bulk molding compound (BMC), and the manufacturing process is as follows:

[0025] (1) Use a high-shear mixer to prepare resin slurry consisting of resins, initiators, pigments, release agents and fillers. The fillers in the above components should be added later, and other components should be added first and stirred evenly, and then slowly Add filler to make it evenly dispersed, and the mixing time is 10min-15min;

[0026] (2) Pour the stirred slurry into a Z-shape reamer mixer or a planetary mixer, and add short glass fiber filaments, and then stir and mix to discharge the material, and the dough is further kneaded into a dough with a kneader State material.

[0027] Preferably, the reflector is made in an injection molding machine by BMC material, and its specific steps are:

[0028] (1) Locking the mold: quickly approach the upper module to th...

Embodiment 2

[0038] The rest is the same as that of Example 1, except that the injection molding in the step (3) of claim 2 adopts three stages of pressure, and the pressure of the first stage is 9×10 6 , the pressure of the second stage is 2×10 6 , the pressure of the third section is 3×10 6 The speeds of the three-stage injection molding are respectively, the first stage is 0.09m / s, the second stage is 0.07m / s, and the third stage is 0.05m / s; the cavity heating temperature in step (4) is controlled at 160°C, The pressure of the barrel is kept at 3×10 6 Pa; the screw speed in step (5) is 50r / min, and the back pressure is 5×10 5 Pa; the stirring and mixing time in the step (2) of claim 1 is 12 minutes, and the composition and mass ratio of the special UV coating are: main resin 40, auxiliary resin 8%, reactive diluent 10%, photoinitiator 1 %, additives 1%, solvent 40%;

Embodiment 3

High temperature resistance tensile strength Example 1 240℃ 310MPa Example 2 300℃ 400MPa Example 3 260℃ 350MPa

[0041] Through the above three embodiments, it can be seen from the three sets of data in the above table that the setting parameters of embodiment 2 are better, and the produced reflector has the highest temperature resistance and the highest tensile strength, which is more conducive to the production of high-quality reflectors. Production.

[0042] The reflector manufacturing process provided by the invention is made of a bulk molding compound (BMC), which is an advanced composite material and an excellent optical reflector material. BMC material injection molding parts have excellent performance, and their tensile strength can reach 4.5×10 7 Pa, the bending strength can reach 9.5×10 7 Pa, can be used at 200°C for a long time without significant performance degradation, excellent electrical properties, especially excellent arc res...

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Abstract

The invention discloses a manufacturing process of a car lamp reflector. The manufacturing process is characterized in that a bulk molding compound (BMC) is adopted as a material, and the reflector is manufactured in an injection molding machine through the BMC. The manufacturing process comprises the specific steps of 1, mold closing, wherein an upper mold block fast approaches a lower mold block, and after it is determined that no foreign matter exists, a system is converted into high pressure, and a mold plate is closed; 2, in-place forward movement of an injection table; 3, injection molding, wherein a screw is set at the three-section speed, pressure and stroke, and a melting material at the front end of a barrel is injected into a mold cavity; 4, heating and pressure maintaining, wherein the mold cavity is heated, meanwhile, the pressure of the barrel is kept, and finally the mold cavity is cooled and formed; 5, heating and glue melting; 6, retreating of the injection table, wherein the injection table retreats to the designated spot after glue melting is finished; and 7, ejection, wherein a product is ejected out by an ejector pin. The indexes of characteristics of the BMC and the forming condition in the injection molding machine are strictly controlled, so that the injection molding product is stable in stability, high in surface flatness and size precision and good in stability, and an excellent multi-curved-surface special-shaped reflector material is achieved.

Description

technical field [0001] The invention relates to the manufacture of automobile lamps, more specifically to a manufacturing process of reflectors for automobile lamps. Background technique [0002] The current rapid development of the automobile industry puts forward higher and higher requirements for automobile lighting. The quality of automotive lighting is very important to driving safety, so the laws and regulations of various countries in the world have strict requirements on automotive lighting. The design of lamps must not only meet the safety requirements such as light shape distribution, but also have some other requirements, such as the appearance is integrated with the appearance of the entire car, beautiful and practical. Therefore, the design technology of car lights is also changing with each passing day with the development of the automobile industry. Car headlights are generally composed of a light source, a reflector and a light distribution mirror. The qual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/00B29C45/77B29C45/76
Inventor 刘平
Owner 刘平
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