Even Postless CBD & THC vape devices still suffer from oil leakage. The root causes can be summarized into four professional dimensions.
First, an unreasonable airway layout and pressure balance design.
Without a central support post, the structure fully relies on side air channels. If the air hole position, aperture size, and layout are not precisely engineered, internal and external air pressure cannot maintain dynamic balance. Under temperature fluctuation, inhalation suction, and logistics vibration, oil is easily squeezed out and leaks.
Second, a defective oil chamber sealing structure.
Postless designs depend entirely on upper and lower shell fitting & sealing. Unreasonable sealing step structure, insufficient interference fit, or missing anti-leak grooves will form tiny assembly gaps. Low-viscosity distillate and runny live resin can easily penetrate through micro clearances.
Third, mismatched oil feeding and atomization speed.
When the ceramic coil feeds oil faster than the atomization consumption, redundant oil accumulates around the coil. This leads to coil flooding, spit-back, and oil escaping along the airway. Material formula incompatibility also worsens oil control problems.
Fourth, mold tolerance, material & assembly flaws.
Loose mold tolerance creates fitting gaps. Low-grade silicone will swell, harden, or degrade after prolonged terpene exposure, thereby losing sealing stability. Uneven pressing and part misalignment during assembly cause latent leakage, which only occurs after transportation vibration.
Without strict high-low temperature cycling, negative pressure, vibration, and drop reliability testing, hidden structural defects pass inspection and cause batch after-sales leakage.
