Aviation lamp glass lampshade and manufacturing method thereof

Abstract

The invention discloses an aviation lamp glass lampshade and a manufacturing method thereof. The aviation lamp glass lampshade is prepared from, by weight, 70%-80% of silicon dioxide, 3%-5% of sodium oxide, 0.1%-0.2% of potassium oxide, 0.1%-0.2% of lithium oxide, 15%-20% of boric oxide, 3%-5% of aluminum oxide, 0.5%-0.6% of zinc oxide and 0.3%-0.4% of antimony oxide, and the sum of the weight percentages is 100%. The method has the beneficial effect of reducing the cracking phenomenon of the glass lampshade of the aviation lamp in an environment with rapid temperature change (temperature impact).

Description

Technical Field

[0001] This invention relates to glass lampshades for aviation lights, and more particularly, to a glass lampshade for aviation lights and its manufacturing method. Background Technology

[0002] Aviation lights, installed on the aircraft fuselage, should not only provide illumination but also serve as collision avoidance, early warning, infrared, and formation navigation signal transmission functions. Currently, the glass covers used in aviation lights frequently crack or spontaneously shatter under harsh weather conditions, seriously affecting aircraft safety. Summary of the Invention

[0003] The purpose of this invention is to solve the problem that glass covers for aviation lights often crack or spontaneously explode under harsh climatic conditions, and to provide a new type of glass cover for aviation lights and its manufacturing method.

[0004] To achieve the above objectives, the present invention provides a technical solution: a glass lampshade for aviation lighting, the raw materials of which are composed of the following components by weight percentage: silicon dioxide 70-80%, sodium oxide 3-5%, potassium oxide 0.1-0.2%, lithium oxide 0.1-0.2%, boron oxide 15-20%, aluminum oxide 3-5%, zinc oxide 0.5-0.6%, antimony oxide 0.3-0.4%, with a total weight percentage of 100%. The beneficial effects are at least as follows: 1. Increasing the amount of boron oxide aims to reduce the cracking phenomenon of the glass lampshade for aviation lighting in environments with rapid temperature changes (temperature shock); 2. Reducing the amount of sodium oxide and potassium oxide aims to further reduce the cracking phenomenon of the glass lampshade for aviation lighting in environments with rapid temperature changes (temperature shock).

[0005] As a preferred option for glass lampshades for aviation lighting, the raw materials for their preparation consist of the following components in weight percentage: 75% silicon dioxide, 3% sodium oxide, 0.1% potassium oxide, 0.1% lithium oxide, 17% boron oxide, 4% aluminum oxide, 0.5% zinc oxide, and 0.3% antimony oxide.

[0006] Another technical solution provided by this invention: a method for manufacturing a glass lampshade for aviation lights, comprising: a melting step; a molding step; and an annealing step. The beneficial effect is at least that the tempering step is omitted in the manufacturing method, with the aim of reducing the risk of spontaneous breakage of the glass lampshade for aviation lights.

[0007] As a preferred method for manufacturing glass lampshades for aviation lights, in the melting step, the raw materials are placed in a melting furnace, the melting temperature is 1420±2℃, and the melting time is 12-14h.

[0008] As a preferred method for manufacturing glass lampshades for aviation lights, in the melting step, after the raw materials are completely melted, the melting temperature is adjusted to 1415±2℃.

[0009] As a preferred method for manufacturing glass lampshades for aviation lighting, in the melting step, the coefficient of thermal expansion of the molten raw materials is determined to be less than 33 × 10⁻⁶. -7 .

[0010] As a preferred method for manufacturing glass lampshades for aviation lights, the annealing step involves an annealing temperature of 510±10℃ and an annealing time of 2-3 hours.

[0011] A preferred method for manufacturing glass covers for aviation lights also includes a flame polishing step, which occurs between the injection molding and annealing steps. The beneficial effect is at least the elimination of cold lines on the surface of the glass cover.

[0012] A preferred method for manufacturing glass covers for aviation lights also includes a stress testing step following the annealing process. The beneficial effect is at least that it ensures the stress in the glass cover of the aviation light is eliminated or substantially eliminated.

[0013] A preferred method for manufacturing glass covers for aviation lights also includes a temperature stamping test screening step following the annealing process. The beneficial effect is at least in ensuring a high pass rate for the glass covers used in aviation lights. Attached Figure Description

[0014] Figure 1 This is a flowchart of a method according to an embodiment of the present invention.

[0015] Figure 2 This is a schematic diagram of the injection mold in an embodiment of the present invention. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. It should be noted that these descriptions of embodiments are intended to aid in understanding the invention and do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0017] See Figure 1 The figure shows a method for manufacturing a glass lampshade for an aviation light fixture. The manufacturing method includes:

[0018] Melting Step: The raw materials are placed in a melting furnace for melting. The raw materials consist of the following components by weight percentage: silicon dioxide 75%, sodium oxide 3%, potassium oxide 0.1%, lithium oxide 0.1%, boron oxide 17%, aluminum oxide 4%, zinc oxide 0.5%, and antimony oxide 0.3%. The melting temperature is 1420±2℃, and the melting time is 12-14 hours. Preferably, after the raw materials for preparing the glass lampshade of the aviation lamp are completely melted, the melting temperature is reduced to 1415±2℃ and maintained at a constant temperature. Measurement of the expansion coefficient of the molten raw materials: The expansion coefficient of the molten raw materials is measured using a thermal expansion meter. When the expansion coefficient value is lower than 33×10⁻⁶, the expansion coefficient is considered complete. -7 At that time, the raw materials reached a qualified state.

[0019] Injection molding steps: See Figure 2 The figure shows an injection mold. The injection mold consists of a lower mold 1 and an upper mold 2. A flame is used to continuously heat the injection mold. The lower mold 1 and the upper mold 2 together complete the molding of the glass lampshade 3 for the aviation lamp. Excess raw materials can be discharged through the overflow port 4.

[0020] Flame polishing step: Eliminate cold lines on the surface of glass lampshades for aviation lights.

[0021] Annealing steps: Annealing temperature: 510±10℃, time: 2.5h.

[0022] Stress testing procedure: The glass cover of the aviation lighting fixture is stress-checked using a polarizing stress meter. Since glass is an isotropic material with the same refractive index in all directions, the presence of stress will disrupt its isotropic properties, causing a change in refractive index and resulting in birefringence. This phenomenon is used to determine whether the stress has been relieved.

[0023] Temperature-controlled exposure screening procedure: Place the glass cover of the aviation light fixture in an oven at 130℃ for 4 hours, then immerse it in 20℃ cold water to create a 110℃ temperature-controlled exposure. After the test, if the glass cover of the aviation light fixture has no defects such as cracks, it is qualified for warehousing.

[0024] See the table below, which records the temperature surge test data for glass lampshades made of different materials. It is evident that Comparative Example 2 is superior to Comparative Example 1, and this embodiment is superior to Comparative Example 2. Increasing the amount of boron oxide aims to reduce cracking of the aviation lighting glass lampshade in environments with rapid temperature changes (temperature surge); reducing the amount of sodium oxide and potassium oxide aims to further reduce cracking of the aviation lighting glass lampshade in environments with rapid temperature changes (temperature surge).

[0025]

[0026] The above description merely illustrates embodiments of the present invention and is quite specific and detailed; however, it should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A glass lampshade for aviation lights, characterized in that, Its preparation raw materials consist of the following components in weight percentage Composition: 70-80% silicon dioxide, 3-5% sodium oxide, 0.1-0.2% potassium oxide, 0.1-0.2% lithium oxide, 15-20% boron oxide, 3-5% aluminum oxide, 0.5-0.6% zinc oxide, 0.3-0.4% antimony oxide, total weight percentage 100%.

2. The glass lampshade for aviation lights according to claim 1, characterized in that, The raw materials for its preparation consist of the following components in weight percentage: 75% silicon dioxide, 3% sodium oxide, 0.1% potassium oxide, 0.1% lithium oxide, 17% boron oxide, 4% aluminum oxide, 0.5% zinc oxide, and 0.3% antimony oxide.

3. A method for manufacturing a glass lampshade for an aviation lamp as described in claim 1 or 2, characterized in that, include: Melting step; Injection molding steps; And the annealing step.

4. The method for manufacturing the glass lampshade of an aviation light fixture according to claim 3, characterized in that, In the melting step, the raw materials are placed in a melting furnace at a melting temperature of 1420±2℃ for 12-14 hours.

5. The method for manufacturing the glass lampshade of an aviation light fixture according to claim 4, characterized in that, During the melting step, after the raw materials are completely melted, the melting temperature is adjusted to 1415±2℃.

6. The method for manufacturing the glass lampshade of an aviation light fixture according to claim 3, characterized in that, In the melting step, the coefficient of thermal expansion of the raw materials used for melting is determined to be less than 33 × 10⁻⁶. -7 .

7. The method for manufacturing the glass lampshade of an aviation lamp according to claim 3, characterized in that, In the annealing step, the annealing temperature is 510±10℃ and the annealing time is 2-3h.

8. The method for manufacturing the glass lampshade of an aviation lamp according to claim 3, characterized in that, Also includes: Flame polishing step, which falls between the injection molding step and the annealing step.

9. The method for manufacturing the glass lampshade of an aviation light fixture according to claim 3, characterized in that, Also includes: Stress testing steps following the annealing process.

10. The method for manufacturing the glass lampshade of an aviation light fixture according to claim 3, characterized in that, Also includes: The screening step is a warm stamping test following the annealing step.

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