The principle and structure of a hot melt adhesive melt pump
The hot melt adhesive pump is mainly composed of two gears, pump body, and side cover plate, which together form the feeding area, feeding area, and discharging area of the pump. When the gear rotates in the specified direction, the melt will be sucked into the middle of the grooves of the two gears and enter the feeding area. As the gear further rotates, the melt is brought into the feeding area and moves forward along the pump body under the push of the gear. When the gears mesh again, the molten material in the grooves is squeezed into the discharge area and sent out through the outlet pipeline. This working principle allows the gears to continuously transport molten material to the outlet as long as the pump shaft continues to rotate. Therefore, the outlet of the hot melt adhesive pump can achieve high pressure, while the requirements for inlet flow rate and pressure are relatively low.
The structure of the hot melt adhesive pump mainly includes the following parts:
Pump body: The pump body is the main body of a hot melt pump, usually made of corrosion-resistant materials to ensure that it does not rust or be damaged during long-term use. There are specific channels inside the pump body for the flow of molten metal.
Gear: Gear is the core component of a hot melt adhesive pump, usually composed of two gears that are interlocked with each other. When gears rotate in the specified direction, the space between them changes, enabling the suction, transportation, and discharge of molten metal.
Side cover plate: The side cover plate, together with the pump body, forms the working space of the gear, ensuring that the melt can flow along the predetermined path.
Shaft sleeve: The shaft sleeve is used to support and protect the driving and driven shafts, ensuring their stable rotation.
Sealing device: The hot melt adhesive pump is also equipped with sealing devices such as spiral seals to prevent molten metal from leaking inside and outside the pump body.
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