4results about How to "Reduce density unevenness" patented technology

The invention relates to the technical field of fuel cells, and particularly discloses a preparation method of a fuel cell graphite composite plate and the graphite composite plate prepared by the preparation method. The preparation method of the fuel cell graphite composite plate comprises the following steps: S1, raw material granulation: weighing 201 + / -10 parts of graphite composite powder, uniformly spreading the graphite composite powder on a flat plate, drying at 90-150 DEG C for 10-30 minutes, cooling, and crushing to prepare composite powder particles with the particle size of 200 + / -100 meshes; and S2, uniformly spreading the prepared composite powder particles in a mold, carrying out low-pressure prepressing during mold pressing, carrying out secondary material distribution on a gas flow field side, and finally carrying out hot press molding to prepare the fuel cell composite graphite plate. The graphite composite plate for the fuel cell can be used for preparing the fuel cell, and has the advantages of low contact resistance with carbon paper and high conductivity; in addition, the preparation method has the advantages that material distribution is convenient, and the adverse effect of contact resistance of the composite plate and the membrane electrode on the performance of the fuel cell is reduced.

This application relates to a feeding device for a polystyrene foam molding machine, belonging to the technical field of plastic processing. It includes a storage cylinder positioned above the foam molding machine body, a collecting hopper below the storage cylinder, a distributing cone installed inside the collecting hopper, and multiple guide pipes fixedly connected around the distributing cone. The openings of the guide pipes are equidistantly arranged around the axis of the distributing cone. The ends of the guide pipes away from the collecting hopper are positioned above the foam molding machine body and spaced apart along the length of the foam molding machine body. Multiple distributing plates are positioned above the foam molding machine body, arranged along the length of the foam molding machine body, and each distributing plate corresponds to and is fixedly connected to one of the guide pipes. A driving assembly is provided on the foam molding machine body to move the distributing plates on the foam molding machine body. This application has the effect of improving the uniformity of raw material distribution within the foam molding machine.

The application relates to the technical field of textile printing and dyeing, and discloses a waterless printing and dyeing process intelligent control method and system.The method comprises the following steps: collecting dye dispersion and fabric fiber density data in a waterless medium, and generating an initial concentration distribution map; inputting a convolutional neural network to identify concentration instability regions and local deviation values; if the deviation exceeds a preset threshold, iteratively optimizing dye injection parameters to obtain an optimized concentration distribution map; segmenting the regions and extracting dye penetration path vectors of high fiber density regions; determining regional adsorption adjustment coefficients through a support vector machine; updating the parameters to obtain a dynamic concentration regulation sequence; iteratively optimizing the final uniform coloring distribution through coloring simulation; and extracting quality indicators to optimize process parameters and determine a production compatibility scheme.The application solves the problem of uneven dye dispersion through multi-dimensional data fusion and intelligent algorithm regulation, and improves coloring uniformity, process stability and production compatibility.

The utility model discloses a multichannel distributor for reagent testing, which relates to the technical field of reagent testing distribution and comprises a fixing frame, the upper side of the fixing frame is fixedly connected with a distribution barrel, a distribution pipe is arranged below the distribution barrel in a penetrating manner, and the top side of the distribution barrel is fixedly connected with a fixing plate. According to the multi-channel distributor for reagent testing, the motor is started, the motor drives the rotating disc to rotate, in the rotating process of the rotating disc, the fixing column can be synchronously driven to rotate, the rotating disc is driven to rotate, the rotating disc is driven to rotate, the rotating disc is driven to rotate, and the rotating disc is driven to rotate. At the moment, a fixed column slides along the interior of a movable frame and pushes the movable frame in an abutting manner, so that the movable frame pushes a push plate to move through a push rod, and at the moment, the push plate can drive a stirring rod to move, so that the liquid reagent in the distribution barrel is stirred; and the possibility of nonuniform concentration of the distributed reagent due to precipitation of the liquid reagent is reduced.