Component a glue is inhaled and increased to high pressure, component B glue is inhaled and sent to the proportional pump for pressurization, and the relative flow of components a and B is adjusted from
The ratio mechanism is determined, and then it is sent to the mixer at the same time. After full mixing, it finally reaches the glue gun and applies glue to the places to be sealed.
A relief valve is set at the outlet of the proportional pump for pressure relief during glue flushing (the component B relief valve shall be opened).
The mixer is equipped with a one-way valve to prevent the glue of components a and B from connecting with each other and blocking the channel; The mixer and its check valve shall be cleaned once in about seven days.
3.2 pneumatic working principle of syt-4 two-component glue applicator
Syt-4 two-component gluer is powered by compressed air. Compressed air has two functions here: one is to drive the pneumatic motor of pumps a and B and the ratio adjustment mechanism (driven by pump a); The second is to control the lifting and unloading of component A and B pumps.
The whole machine is equipped with a main switch (G3 / 4 copper ball valve); A. Each pump B has a switch; A. Pump B elevator is controlled by respective manual rotary valve (i.e. the rising and falling valve on the control box panel), which has three stations of "rising", "stopping" and "falling"; There is a manual air inlet valve and a vent switch (G1 / 4 copper ball valve) on the pressure plate.
3. Working principle of 3A pump and B pump (see Fig. 4 and Fig. 5)
Both pump a and pump B are double acting pneumatic hydraulic booster pumps. Pump a is a mechanical reversing mechanism. Its working principle is as follows: after the pneumatic motor enters compressed air from the top, when the cylinder piston moves up or down close to the end of the cylinder, the piston rod connected with the gas piston compresses the reversing spring, the spring accumulates energy, the piston continues to move forward to a certain position, and the reversing mechanism instantaneously pushes the reversing device of gas distribution under the action of the spring, Thus, the piston in the pneumatic motor cylinder makes a stable and continuous reciprocating motion. The force of the cylinder piston acts on the plunger in the hydraulic pump. Since the area of the cylinder piston is larger than that of the hydraulic pump, the inhaled rubber is pressurized, and the pressurized rubber is output through the joint of the pump base.
Pump B is a differential pressure mechanical reversing mechanism. Its working principle is: the pneumatic motor enters the compressed air from the top. If it enters the lower chamber of the cylinder, the upper chamber is connected with the atmosphere. The force of the compressed air acting on the piston (half of the cylinder area, because the area of the plunger rod accounting for half of the cylinder area should be removed) causes the piston to drive the piston rod and plunger in the hydraulic pump upward, When the cylinder piston moves to the cylinder near the end, the plunger rod connected with the gas piston compresses the reversing spring, the spring accumulates energy, and the piston continues to move forward to a certain position. Under the action of the spring, the reversing mechanism instantaneously promotes the reversing of the gas distribution reversing device, so that the compressed air enters the upper and lower cavities of the cylinder at the same time.
Since the effective area of the upper chamber is twice that of the lower chamber, the force of compressed air on the upper end of the piston is greater than that on the lower end, the piston drives the piston rod and plunger in the hydraulic pump to move downward. When the cylinder piston moves to the lower end of the cylinder, the plunger rod connected with the gas piston compresses the reversing spring, the spring accumulates energy, and the piston continues to move forward to a certain position, Under the action of the spring, the reversing mechanism instantaneously pushes the valve reversing device to reverse. In this way, the reciprocating motion of the piston is realized.
The function of pump B is to deliver the glue required for upward suction to the proportional pump. Therefore, when the proportional pump sucks in, pump B moves; When the proportional pump is pressed out, pump B cannot move. Therefore, when the two-component glue applicator works normally, pump B moves intermittently (not continuously).