30results about How to "Uniform pressure transmission" patented technology

The invention relates to a forming tool and a method for preparing a rectangular hollow composite tubular member by using the forming tool. The forming tool comprises a body and an auxiliary piece. The body comprises a bottom plate, a left side baffle, a right side baffle and an upper baffle which are matched with one another to form a rectangular cavity. The upper ends of the left side baffle andthe right side baffle are both designed to be in a corner form extending inwards. The left side baffle and the right side baffle are detachably connected with the bottom plate, and the upper baffle is detachably connected with the left side baffle and the right side baffle. The auxiliary piece comprises a left auxiliary stop block, a right auxiliary stop block and an auxiliary flat plate. The left auxiliary stop block and the right auxiliary stop block are detachably connected with the upper end of the left side baffle and the upper end of the right side baffle respectively. The auxiliary flat plate serves as an independent piece to be placed in the rectangular cavity, and when the auxiliary flat plate translates to the upper side, the left side and the right side of the auxiliary flat plate can be clamped by the corners of the left side baffle and the right side baffle, and the length of the auxiliary flat plate is not smaller than that of the bottom plate. By means of the forming tool, the high-quality rectangular hollow tubular member can be obtained.

The invention relates to a forming tool and a method for preparing a rectangular hollow composite material tubular member by using it. The forming tooling includes a main body and auxiliary parts; the main body includes a bottom plate, a left side baffle, a right side baffle and an upper baffle, and the four cooperate with each other to form a rectangular cavity; the upper ends of the left side baffle and the right side baffle are designed as The corner form extending inward; the left side baffle and the right side baffle are detachably connected with the bottom plate, and the upper baffle is detachably connected with the left side baffle and the right side baffle; the auxiliary parts include left auxiliary block, right Side auxiliary block and auxiliary plate; the left auxiliary block and the right auxiliary block are detachably connected with the upper end of the left baffle and the upper end of the right baffle respectively; the auxiliary plate can be placed in a rectangular cavity as an independent piece and when When moving to the top, the left and right sides can be blocked by the corners of the left side baffle and the right side baffle, and the length is not less than the length of the bottom plate. The forming tool can obtain high-quality rectangular hollow tubular members.

The invention discloses a C-shaped beam composite material forming tool and a composite material C-shaped beam forming method. The forming tool comprises a male mould part and an auxiliary cover plate, wherein the two sides of the male mould part are inwards sunken to form sunken regions; the auxiliary cover plate covers the outer side of the male mould part; and the upper side end of the male mould part, the two inner sunken regions and the auxiliary cover plate define a cavity for placing a prepreg part. The forming method comprises the following steps of: coating a de-molding agent for composite material manufacturing on the male mould part; pre-soaking and automatically cutting according to a process expanded view; spreading prepreg on the male mould part in a layer-shaving and layingmode to form the prepreg part; placing a gas guide material on the outer side surface of the prepreg part; performing vacuum compaction treatment; covering the auxiliary cover plate at the peripheralside of the male mould part; and completing curing of a C-shaped beam through a vacuum bag pressing method. A manufactured C-shaped beam, an R angular ea, interior and surface quality, dimension precision and the like achieve the perfect requirements, and the auxiliary cover plate can be repeatedly utilized for many times, so that production efficiency is improved.

The invention discloses an automatic equipment for culvert pipe production, which belongs to the field of culvert pipe production equipment. The automatic equipment for culvert pipe production uses the heat of water vapor to increase the temperature of nitrogen in the expansion cavity in the link of water vapor curing, thereby increasing its temperature. Pressure and volume, use the expansion pad to press the attachment pad, and press the repair material block melted by the high temperature of water vapor, so that the repair material block penetrates into the groove on the inner wall surface of the main body of the cement culvert pipe, and then in the cooling process, on the inner wall of the main body of the cement culvert pipe A smooth protective layer is formed on the surface, and the formation of the protective layer is more uniform through the arrangement of elastic cavities, elastic balls and filling fiber clusters in the expansion pad, and the surface treatment of the inner wall of the culvert can be realized to make the surface of the culvert smooth and not easy Excessive wear is formed locally on the inner wall of the culvert, and it is not easy to cause the surface treatment layer to peel off from the inner wall of the culvert under the washing of running water, so as to ensure the normal service life of the culvert.

Hot-pressing tympan paper taking a pressing copper-clad plate as a cushion layer takes natural-color needlebush pulp, natural-color broadleaf wood pulp and kraft paper leftover materials as fiber rawmaterials; short fiber free pulping is adopted; the current of a pulping machine, the beating degree and the wet weight are controlled; finally, the quantity is 192+ / -4 g / m<2>, the thickness is 0.320+ / -0.02 mm, the tensile strength is more than or equal to 10 KN / m, the air permeability is more than or equal to 10 [mu]m / pa*s, the folding resistance is more than or equal to 10 times, the water-absorbing property is more than or equal to 100 mm / min, and the tightness is controlled to 550 to 600 kg / m<3>. Through cell cavity filling, on one hand, the fiber raw materials are reduced and the cost isgreatly saved; and on the other hand, fillers are added into the cell cavities, so the paper strength is not influenced. Therefore, the hot-pressing tympan paper has double advantages of improving theproperties of the tympan paper and reducing the cost.