Foam tool

Abstract

The invention discloses a foam tool, which comprises a gun body, a liquid inlet valve, a liquid outlet valve, a liquid outlet channel and a switching device, wherein the switching device can open or close the liquid outlet valve; and the liquid outlet valve comprises a liquid outlet nozzle with an outlet, a valve plug and a reset spring. The foam tool is characterized in that: threads, a concave part or a convex part is arranged on the head of the valve plug; the foam tool also comprises a sealing ring which is connected with the threads, the concave part or the convex part on the head of the valve plug into a whole and is sealed with the liquid outlet nozzle so as to effectively prevent and avoid the leakage and / or curing of foam caulking agent in the foam tool; the danger of the leakage, burning or explosion of the foam caulking agent or gas is effectively prevented and avoided; the abrasion performance, airtightness and stability of the sealing ring are improved; the leakage of the foam caulking agent caused by abrasion, looseness, deformation, fracture, peeling off or corrosion of the foam filler or cleaning agent of the sealing ring is avoided; the blockage of the channel or the outlet in the foam tool is effectively prevented and avoided; and the leakage of the foam caulking agent or gas caused by the deformation or fracture of the liquid outlet nozzle is effectively prevented. The foam tool has a simple and reasonable structure, greatly improves the foaming quantity and quality of foam caulking agent, saves energy, has safe and cleaning use, prolongs the service life, has low cost, and is suitable for mass production.

Description

technical field [0001] The present invention relates to a foaming tool for spraying foam caulk. Background technique [0002] About the anti-seepage installation, caulking or leak repair of doors, windows, walls, coatings, concrete, wood and plastic surfaces in buildings and houses, insulation of air-conditioning installations, leak-proof layers, installation of various pipes, vents And the hole filling of the wire outlet, the switch socket and the installation that require insulation, etc., generally use foam sealants as raw materials, for example: foam sealants can use gas and chemical materials with their own air pressure, such as using Butane gas mixed with polyurethane, etc., expand after spraying to form a foam, and then naturally solidify. When in use, the foam sealant is released through a foaming tool to achieve installation, caulking, leak repair, heat preservation, insulation or bonding. For purposes such as foam caulking agent (foam filling agent), the channel i...

AI Technical Summary

Problems solved by technology

[0003] The valve core and liquid outlet nozzle in the foaming tool of the prior art are generally directly hard-sealed, although the foaming (expansion) effect of the foamed caulking agent sprayed out is better, but when loading with the foam filler After filling or intermittent work or when there is foam caulk left in the channel, it is difficult to be sealed because of its high air pressure, that is to say, the normal or stable sealing requirements cannot be achieved between them, and foam caulking The agent is easy to leak outward, which can easily cause the foam sealant in the gun body to solidify and cause the entire channel to be blocked, and even cause the danger of burning or explosion. In addition, during construction, the liquid nozzle is easy to wear and cause Leakage phenomenon

[0004] There is also a sealing ring arranged in the liquid outlet, and a fixing member is used to fix the sealing ring with a large area. It has been found that when the foam caulking agent is sprayed from the liquid outlet, the sealing ring and / or the fixing member will not affect the foam filling. The flow rate of the caulking agent has a great obstacle, which reduces the foaming amount and quality of the foam caulking agent, and increases the cost; due to the strong viscous force of the foam caulking agent, the continuous movement of the valve core during construction or Twisting, it is easy to pull (stick) the sealing ring in the liquid nozzle, causing the sealing ring to wear or loosen or deform or fall off. In addition, the valve core is constantly moving back and forth during construction, and the head of the valve core is easy to poke The inner hole of the sealing ring is set on the liquid nozzle, which causes damage to the key sealing part of the sealing ring. Therefore, there is still leakage of foam caulking agent or gas or the solidification of foam filler, and even combustion or explosion may occur. Danger, shortened service life of foaming tools

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