Foam tool

Abstract

The invention discloses a foam tool, which comprises a gun body, a liquid inlet valve, a liquid outlet valve 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, a valve plug and a reset spring. The foam tool is characterized in that: a concave part is arranged on the valve plug; a sealing ring is arranged in the concave part and is sealed with the liquid outlet nozzle; at least part of the head of the valve plug is exposed out of the sealing ring 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; and the leakage of the foam caulking agent caused by abrasion, looseness, deformation or peeling off is avoided. 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 foam 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 outlet of the wire, the switch socket and the installation that require insulation, etc., generally use the foam sealant as the raw material. When in use, the foam sealant is released through the foaming tool to achieve installation, caulking, and leakage repair. For the purpose of heat preservation, insulation or bonding, etc., the channel of the foam sealant in the foaming tool is generally in a liquid state with air pressure or higher air pressure. When the liquid nozzle is opened through the switch device in the foaming tool, the spray The foamed sealant is cured aft...

AI Technical Summary

Problems solved by technology

[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 outlet of the wire, the switch socket and the installation that require insulation, etc., generally use the foam sealant as the raw material. When in use, the foam sealant is released through the foaming tool to achieve installation, caulking, and leakage repair. For the purpose of heat preservation, insulation or bonding, etc., the channel of the foam sealant in the foaming tool is generally in a liquid state with air pressure or higher air pressure. When the liquid nozzle is opened through the switch device in the foaming tool, the spray The foamed sealant is cured after foaming and bonded to the required place. Therefore, in the process of construction with foaming tools, the sealing performance of foaming tools must be high, especially in foaming tools. The sealing stability of the outlet valve is more important. When the filling valve is installed on the inlet valve of the foaming tool, if the sealing degree of the outlet valve is not up to the standard or there is a slight leakage, the foaming tool will The foam sealant will solidify or overflow or spray out endlessly at any time, causing the foaming tools to be easily scrapped, and it is difficult to clean without damaging the hands or clothes. serious consequence

[0003] In the prior art, the valve core and the liquid nozzle of the foaming tool are generally directly hard-sealed. Although the foaming (expansion) effect of the sprayed foam sealant is better, there is foam left in the intermittent work or in the channel. The caulking agent is difficult to be sealed due to its high air pressure, that is to say, the normal sealing requirements cannot be met between them, and the foam caulking agent is easy to leak outward, which can easily cause the foam filling in the gun body. The joint agent will solidify and cause the entire channel to be blocked, and even there will be a danger of burning or explosion. In addition, during construction, the liquid nozzle is easy to wear and cause leakage.

[0004] There is also a sealing ring in the liquid outlet. In this structure, generally, a fixing piece can be used to fix a large-area sealing ring. It has been found that when the foam sealant is sprayed from the liquid outlet, the sealing ring and the / or the fixing parts have greatly hindered the flow rate of the foam sealant, reducing the foaming amount and quality of the foam sealant, and increasing the cost. In addition, due to the strong viscosity of the foam sealant, the The continuous back and forth movement of the spool during construction can easily pull (stick) the sealing ring and cause the sealing ring to loosen or deform or fall off, and it is also easy to wear the sealing ring. Therefore, there is still the phenomenon of leaking foam sealant, which shortens the Service life of foaming tools

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