Sampling a groove for a mortise door lock. Drawing, description

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Sampling a groove for a mortise door lock. home workshop

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The proposed mechanism is designed to select a groove for a mortise door lock.

The device is actually a small milling or, more precisely, tenoning machine, assembled on the basis of an electric drill. Like a milling machine, it has a feed mechanism - a gear rack with a gear and a handle, as well as a sled. There is also a horizontal feed mechanism - two cylindrical rods and a plate with two holes.

An electric drill is fixed on the plate. The device is rigidly fixed with a regular clamp on the door (for this there is a clamp - a section of the channel with two clamping screws), the drill engine is turned on, and the cutting tool is brought to the place chosen for the lock. Further, the tool is deepened into the wood to the desired size and a groove is milled by the vertical feed mechanism.

(click to enlarge)

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Synthesized a new form of carbon 18.01.2023

Carbon can take on a wide variety of forms. The most famous of them are diamond and graphite. Scientists are able to synthesize other types, for example, two-dimensional graphene and fullerene. Now another one has been added to the list.

Specialists from South Korea and China have created a new kind of carbon by heating fullerene with lithium nitride. The new type of carbon is similar to Schwarzite, but still different.

The so-called "schwarzite" or sp2-hybrid carbon with negative curvature was theoretically envisaged as early as the XNUMXth century. He, as the study says, was and remains the dream of scientists in the field of carbon materials, but there were problems with obtaining it. Although this kind of carbon can be synthesized in the pores of zeolites, the crystalline forms of silicon dioxide, this method is not ideal because some of the pores are simply too small.

The new material is based on C60 fullerene powder mixed with lithium nitride and then heated to moderate temperatures under a pressure of one atmosphere. Lithium nitride catalyzes the breaking of carbon bonds in C60. New CC bonds are formed with neighboring C60 molecules. The process of electron transfer triggers the formation of a new type of carbon, which the scientists have called long range ordered porous carbon (LOPC).

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Scientists are figuring out the properties of the new material and cannot yet name the areas in which it can be applied, but it can be, for example, the collection, conversion and storage of energy, since LOPC is electrically conductive. Scientists note that the new material is characterized by good scalability - the synthesis can be increased to kilograms.

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