Puristusruisku

Puristusruisku, often translated as extrusion syringe or paste extruder, is a manual tool designed for precise dispensing of viscous materials. It typically consists of a barrel, a plunger, and a nozzle. The user loads a paste or gel-like substance into the barrel and then applies pressure to the plunger, forcing the material out through the nozzle. The nozzle can be of various sizes and shapes, allowing for fine control over the extrusion width and flow rate.

These devices are commonly used in applications requiring controlled application of adhesives, sealants, solder paste, lubricants, or cosmetic products. In electronics manufacturing, for example, puristusruiskut are used to apply solder paste to printed circuit boards with precision. In laboratories, they can dispense reagents or sample preparation materials. Hobbyists and artists also utilize them for applying glues, paints, or modeling compounds.

The operation of a puristusruisku is straightforward. The plunger is typically advanced manually by hand or sometimes with a lever mechanism to increase mechanical advantage. The viscosity of the material being dispensed, along with the plunger force and nozzle diameter, dictates the extrusion rate. Some puristusruiskut are designed for single-use, while others are reusable and can be cleaned for multiple applications. They offer a cost-effective and accessible method for precise dispensing compared to more automated machinery.