Diffusion Bonding：
Diffusion connection refers to the surface of the material in contact with each other, heated to the temperature below the melting point of the base metal in a vacuum or protective atmosphere, and the pressure applied to the alignment makes the two connection surfaces locally plastically deformed, and the atoms diffuse each other, forming a new diffusion layer at the interface, so as to achieve a reliable connection. Diffusion connections are divided into solid-phase diffusion and liquid-phase diffusion. In recent years, with the development of material science, new materials continue to emerge, and in production applications, new materials themselves or connection problems with other materials are often encountered. Such as ceramics, metal compounds, amorphous materials and single crystal alloys, etc., it is difficult to achieve reliable connection with traditional methods, and the purpose of diffusion connection can be achieved by using hot isostatic pressing technology.
Application areas
Threaded elements:
The separation screw is an additional thread or screw groove in the molten section, which can only be integrated with the original screw; The barrier screw and shunt screw are mostly added in the homogenization section or the molten section to add various sections in the non-threaded form, which are called screw elements. The screw element can be integrated with the screw, or it can be added to the screw body by connection. According to the different functions of these sections, they are called conveying elements, compression elements, shearing elements, mixing elements, homogenization elements, etc.
The conveying element is mainly a threaded structure, and its function is to transport materials, give the materials a certain thrust, so that the materials can overcome the resistance encountered in the flow channel. The compression element mainly makes the volume of the material smaller and plays the role of compression and strengthening. The mixing and mixing elements mainly make the material subject to a certain shear of the diversion, and further plasticize the material and homogenize the material.
Injection molding machine screw:
During the working process of the injection molding machine, it is done by rotating the screw in the barrel. When the screw rotates, the plastic will cause friction and mutual movement on the inner wall of the barrel, the bottom surface of the screw groove, the screw propulsion surface, and the plastic and plastic. The forward movement of the plastic is the result of this combination of motion, and the heat generated by friction is also absorbed to increase the temperature of the plastic and melt the plastic, and the design structure of the screw will directly affect the degree of these effects.
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