3results about How to "Good centering effect" patented technology

This invention discloses an integrated multi-nozzle air-assisted 3D printing nozzle, comprising an upper horizontal plate, a lower horizontal plate, m material feed cylinders, and a heating element, where m is 3-100. The upper horizontal plate is located above the lower horizontal plate, and the two together form an air chamber. An air inlet is provided on the air chamber. The top wall of the air chamber has m material feed cylinder channels, and the bottom wall has m gas channels. The m material feed cylinder channels and m gas channels are all vertically arranged and simultaneously connected to the air chamber. The m material feed cylinders are vertically arranged, and each material feed cylinder has a discharge port at its lower end. The m material feed cylinder channels, m gas channels, and m material feed cylinders correspond one-to-one. The top of the i-th material feed cylinder is located within and sealed to the i-th material feed cylinder channel, and its bottom is located within the i-th gas channel, with a gap between them for gas passage, i = 1, 2, ..., m. This invention has a simple structure and effectively solves the problems of existing technologies that cannot achieve multi-nozzle printing and simultaneous air-assisted 3D printing of multiple materials and colors.

The application discloses a casing centralizer for controllable reaming well and a related method. The casing centralizer comprises a centralizer body, a binding rope and a locking device. The centralizer body comprises a first hoop ring, a second hoop ring, a first bow piece and a plurality of second bow pieces. The first bow piece and the plurality of second bow pieces are uniformly distributed between the first hoop ring and the second hoop ring in a circumferential direction. The middle part of the first bow piece and the second bow piece is inwardly bent to form a bent part. The locking device is fixed to the inner side of the first bow piece. The binding rope passes through the locking device. The middle part of the first bow piece is provided with a through hole. The binding rope passes through the through hole from the inner side of the first bow piece and is bound to the bent part of the first bow piece and the plurality of second bow pieces. The locking device can be unlocked to release the binding rope. The casing centralizer improves the centering effect of the casing in the reaming section and the cementing quality, solves the problem of difficult pipe string running in, has a simple structure, low processing cost, is convenient for large-scale popularization and application, and is favorable for improving economic benefits.

The invention discloses packaging equipment capable of rapidly replacing a roll film, and relates to the technical field of packaging equipment, the packaging equipment comprises a film releasing device, a V-shaped shaping device and a packaging host, a driving motor drives rotating rings on the two sides to rotate oppositely through a bevel gear and a transmission thread, so that driving side pressing rollers on the two sides are synchronously folded towards the middle and are matched with the upper contour of a transition section; inconsistency caused by respective left and right adjustment is reduced, and the centering and adjusting efficiency of the bending surface is improved. And the upper partial pressure roller and the lower partial pressure roller vertically clamp and roll a triangular surface and form rolling support, so that a film is stressed more uniformly at a transition section, feeding is more stable, and deviation and broken line drift caused by local tension fluctuation are reduced. The driving side pressing roller is attached to the inner side of the bent face, the driven side pressing roller is attached to the outer side of the bent face, symmetrical rolling limiting and rolling clamping are formed on the bent faces on the two sides, springback, wrinkling and edge warping of the bent faces are restrained, and the convergence trend and forming consistency of the bent faces are enhanced.