Development History and Brief Introduction of Machine Injection Equipment
One-way valve piston pump
In the first half of 2016, I also talked with Mr. Rutz, the quality director of German elephant, about the mortar machine. The world's first mortar machine is a two-cylinder one-way valve piston pump. The cylinder block and piston of this type have good wear resistance, but the one-way valve is easy to jam and cause serious internal leakage.
1. Large flow rate is more likely to cause more serious internal leakage, which limits the working capacity of one-way valve plunger pump.
2. Internal leakage also makes it difficult to achieve the ideal working pressure. When the pressure is high, internal leakage is more serious.
3. Internal leakage not only affects workflow and pressure, but also causes reciprocating oscillation of mortar during transportation, leading to bleeding segregation.
4. The internal leakage of mortar is more serious when its viscosity is high, and it is more difficult to deal with the viscosity of gypsum mortar.
As a result, the flow rate of the plunger mortar machine is relatively small, there are impulses, and it also breaks the conveying mortar. PM company invested a lot of energy to improve, but it was difficult to break through (Sany also spent a lot of energy to study one-way valve plunger pump, also declared failure), and then launched screw mortar machine.