How can glass candle holder improve its heat resistance stability through structural design?

To improve the heat resistance stability of glass candle holders, structural design is one of the key factors. Although the thermal properties of glass itself determine its basic heat resistance, reasonable structural design can largely alleviate the stress concentration caused by local heating, rapid temperature changes or uneven heat distribution, thereby significantly improving its crack resistance and explosion resistance.
The following are several specific methods and in-depth analysis to improve the heat resistance stability of glass candle holders through structural design optimization:
1. Control wall thickness and thickness transition method
Glass expands when heated. If one part expands faster than another, internal stress will be generated. Therefore, the wall thickness of the candle holder should be as uniform as possible to avoid areas with "thickness mutation".
Recommended practices:
The overall wall thickness of the candle holder should be kept above 3mm;
At the bottom, edges and other parts that are prone to heat accumulation or stress, use a gradual thickening design instead of sudden thickening;
Avoid sharp edges or sharp turns, and use arcs or gentle slopes to reduce stress concentration.
2. Optimize the bottom and support structure
The flame is usually located near the bottom of the candlestick, and the heat is first concentrated in this area. If the bottom design is unreasonable, it is easy to cause local overheating, which will cause cracking.
Design strategy:
Increase the air circulation space at the bottom, such as using a recessed base or a bracket with feet, so that heat is not easy to accumulate;
The bottom can be provided with heat dissipation holes or ventilation slots to help heat diffusion;
If it is an embedded candlestick (such as for placing columnar candles), an air insulation layer can be reserved at the bottom to prevent heat from being directly transferred to the bottom of the glass.
3. Introduce air insulation layer
Adding air isolation space inside or outside the glass can effectively slow down the speed of heat transfer and reduce the temperature difference on the glass surface.
Specific application:

Design a double-layer glass structure with an air layer in the middle, similar to the principle of a "vacuum insulation cup";
For tall candlesticks, a hollow metal or ceramic connector can be added in the middle section as a buffer for heat conduction;
If it is an LED candle usage scenario, a thinner inner glass layer can be designed with an outer heat insulation cover.
4. Reasonable design of opening and top structure
When the flame burns, it will generate rising hot air flow. If the opening design of the top of the candlestick is not reasonable, it may cause heat accumulation inside.
Optimization direction:
The opening should not be too small to facilitate air flow and heat discharge;
A guide groove or inclined structure can be designed on the top edge to guide the hot air to discharge upward;
If it is a closed candlestick (such as a lantern type), consider leaving a proper amount of exhaust holes on the top to avoid the internal pressure rising and causing the glass to break.
5. Use layered or modular structure
Splitting a complete glass candlestick into multiple relatively independent components helps to disperse heat and reduce the risk of uneven heating overall.
Implementation method:
The upper and lower parts are separable, and the middle is separated by non-thermal conductive materials (such as stainless steel, ceramic);
Multiple small glass tubes are combined into an integral candlestick, leaving gaps between each other to form a natural heat dissipation channel;
This structure also facilitates the replacement of damaged parts and extends the product life.
6. Combine external materials for thermal buffer design
Glass itself has poor thermal conductivity and is fragile, but if it can be used with other materials, it can effectively alleviate thermal shock.
Mixed material design:
Wrap a layer of heat-insulating silicone sleeve or metal grid around the glass to play a buffering role;
Use a ceramic base + glass cover combination to take advantage of the heat resistance of ceramics and the light transmittance of glass;
For candlesticks used outdoors, a wind shield can be installed on the outside of the glass to protect the flame and avoid the sudden cooling effect caused by wind cooling.
Improving the heat resistance and stability of glass candlesticks through structural design is not a problem that can be solved simply by "making the glass thicker", but requires comprehensive consideration of multiple factors such as heat conduction path, stress distribution, air flow, and material matching.