Paint spray guns for making veneer stones

Abstract

The invention discloses a blackwash sprayer used for manufacturing a patch stone. The blackwash sprayer used for manufacturing the patch stone comprises a gun body and storage tank connected with the upper portion of the gun body in a threaded mode. The gun body comprises a front gun body, a rear gun body and a lower gun body. A front cavity used for containing coating is arranged in the front gun body. The front cavity is communicated with the interior of the storage tank. The front end of the front cavity is connected with a nozzle in a threaded mode. A rear cavity is arranged in the rear cavity. A needle plug is arranged in the rear cavity. A piston capable of sliding in the rear cavity is arranged at the rear end of the needle plug. The front end of the needle plug penetrates through the rear cavity and the front cavity in sequence and then plugs a spraying opening of the nozzle. A center blind hole is formed in the front end of the needle plug in a coaxial mode. A through hole which is used for enabling the center blind hole to be connected with the rear cavity is formed in the rear end of the needle plug. An air hole is formed in the lower gun body, wherein the air hole comprises two air outlet holes. One of the air outlet hole is communicated with the rear cavity and the other air outlet hole is communicated with the upper portion of the storage through a straight-through pipe. According to the blackwash sprayer used for manufacturing the patch stone, spraying points of the coating which is sprayed out are enabled to be clear, gas pressure needed is small, discharging is rapid, and working efficiency is improved.

Description

technical field [0001] The invention relates to a spraying equipment, in particular to a paint spray gun used for making patch stones. Background technique [0002] The patch stone includes a thermal insulation board, the thermal insulation board has a first surface and a second surface opposite to each other, the first surface is coated with the first interface layer and the texture coating in sequence, and the second surface is coated with the second interface layer in sequence layer, an elastic coating, a stone-like layer and a protective layer, wherein the stone-like layer is sprayed on the outside of the elastic coating by a spray gun, the existing spray gun includes a gun body and a storage tank, the storage tank is arranged on the ground, and the paint Under the air pressure, it is input into the paint holding space of the gun body through the pipe. When spraying, pull the wrench to make the needle plug on the nozzle move backward, and the paint is sprayed from the no...

AI Technical Summary

Problems solved by technology

[0002] The patch stone includes a thermal insulation board, the thermal insulation board has a first surface and a second surface opposite to each other, the first surface is coated with the first interface layer and the texture coating in sequence, and the second surface is coated with the second interface layer in sequence layer, an elastic coating, a stone-like layer and a protective layer, wherein the stone-like layer is sprayed on the outside of the elastic coating by a spray gun, the existing spray gun includes a gun body and a storage tank, the storage tank is arranged on the ground, and the paint Under the air pressure, it is input into the paint holding space of the gun body through the pipe. When spraying, pull the wrench to make the needle plug on the nozzle move backward, and the paint is sprayed from the nozzle. There are two disadvantages when spraying in this way: 1) The storage tank is placed on the ground, and it needs to rely on air pressure to transport the paint to the nozzle port, which requires a high air pump; 2) The paint is transported to the gun body through the pipe, which will easily squeeze the paint and cause spraying. Unclear and uneven

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