The drop test machine has the following categories and characteristics: First, the single-arm drop test machine: the drop test machine uses a brake motor to drive the drop arm through the chain, and the drop height uses the amount of height ruler. small. This machine is suitable for various manufacturers and quality inspection departments. Second, the zero drop test machine: This test stand is mainly used to assess the degree of impact of the packaging package during actual transportation and loading and unloading, to assess the impact strength of the package during the handling process and the rationality of the packaging design. The zero drop test machine is mainly used for large package drop test. The zero drop test machine consists of an "E" type fork that can move down quickly as a test piece bracket. The tested goods are in accordance with the test requirements (face, edge, angle test) Place the balance. During the test, the pallet moved downwards at a high speed and separated from the test piece. The "E" type fork fell to the bottom plate rubber under the packaged goods of the test. The test can be used for the drop test from the zero height range. The drop height can be set digitally according to the test requirements, and the drop test can be automatically executed according to the set height. The large package goods and test pieces can be dropped. Applicable standards: GB / T1019-2008 Third, the dual-arm drop test machine: The dual-arm series drop test machine mainly meets the ability of the product packaging to withstand transportation conditions, thereby improving and perfecting the packaging design. The dual-arm series drop test machine adopts double-column track direction, spring buffer, and height scale indication. The work is stable and reliable. It can achieve rib, surface, and angle drop. Drop test machines are divided into these three sub-categories, they all have different and same characteristics. Therefore, when choosing a drop test machine, you must know which drop test machine your product is suitable for. Article link: Gongkong (100 stations) http: //Company_news/Detail/73462.html A French press, also known as a cafetière, Ñafetière à piston, Cafeteria, press pot, coffee press, or coffee plunger, is a coffee brewing device patented by Italian designer Attilio Calimani in 1929. Coffee And Tea Press,Stainless Steel French Press,Glass French Press,Borosilicate Glass Coffee Press HOMEARTS INDUSTRIAL CO.,LTD , http://www.homeartschina.com
A French press works best with coffee of a coarser grind than does a drip brew coffee filter, about the consistency of kosher salt. Finer grounds, when immersed in water, have lower permeability, requiring an excessive amount of force to be applied by hand to lower the plunger and are more likely to seep through or around the perimeter of the press filter and into the coffee. Additionally, finer grounds will tend to over-extract and cause the coffee to taste bitter. Coffee is brewed by placing the ground coffee in the empty beaker and adding hot-between 93–96 °C (199–205 °F)-water, in proportions of about 30 g (1.1 oz) of coffee grounds to 500 ml (17 US fl oz) of water, more or less to taste. The brewing time is about two to four minutes. The plunger is pressed to separate the grounds and hold them at the bottom of the beaker. The mesh piston normally does not compress the coffee grounds, as most designs leave a generous space-about 30 mm (1.2 in)-below the piston in its lowest position. If the brewed coffee is allowed to remain in the beaker with the used grounds, the coffee may become astringent and bitter, though this is an effect that some users of the French press consider desirable. It is believed that the optimum time for brewing the coffee is around four minutes, and some consider the coffee spoiled after about 20 minutes. Other approaches, such as cold-brewing, require several hours of contact between the water and the grounds to achieve the desired extraction.