112results about How to "Reduce the difficulty of demoulding" patented technology

The invention discloses an existing tunnel lining reinforcement structure and a reinforcement method. The reinforcement structure is characterized in that arch lining steel frames serve as main supporting structures and are adopted for supporting formwork to form supporting units, a distance between the inner side of each supporting unit and an existing tunnel lining is smaller than 37.5cm to guarantee catenary safety and construction safety, concrete is poured to the inner side of the supporting formwork repeatedly, and the lining steel frames and the formwork are demounted after pouring is finished. According to the reinforcement method, the existing tunnel is equally segmented, segments are sequentially numbered, the supporting units are erected at intervals on odd segments, width of the supporting units is determined according to the segmenting conditions and stress conditions in a concrete pouring process, each supporting unit forms an independent concrete pouring cavity, concreteend faces of odd segments serve as end moulds of the even segments, and only inner side formwork supporting is needed; by segmented pouring, the lining steel frames can be demounted conveniently, influences on concrete service life due to pouring of the lining steel frames in concrete are avoided, and operating efficiency is greatly improved.

The invention provides a closed type centrifugal impeller casting device which comprises a bottom mould part, a top mould part, a plurality of carbonyl cores and an ejection part, wherein the top mould part is detachably buckled on the bottom mould part, and a cavity is formed between the bottom mould part and the top mould part; a plurality of the carbonyl cores are arranged in the cavity at intervals along the peripheral direction of the bottom mould part; and the ejection part is movably arranged on the bottom mould part, and one side, which faces the top mould part, of the ejection end of the ejection part extends to act or retracts into the bottom mould part. Because the ejection part is arranged, after the casting is completed, one side, which faces the top mould part, of the ejection end of the ejection part extends to act to eject a completely cast closed type centrifugal impeller from the bottom mould part so that the closed type centrifugal impeller is completely removed from the bottom mould part, so that the demoulding difficulty is reduced, the qualification rate of finished products is increased, and the problem of finished product damage caused by difficult demoulding is prevented.

The invention provides a lens group, which comprises a first lens and a second lens, wherein both the first lens and the second lens comprise an optical part positioned in the center of a lens and a fixed part which is positioned on the circumference of the lens and is used for fixing the lens; the circumference of the first lens is provided with a bench, and the bench is provided with a first propping surface vertical to an optical axis of the first lens; and the circumference of the second lens is provided with a lug boss which is matched and clamped with the bench, and the lug boss is provided with a second propping surface which is far from the fixed part of the second lens, is vertical to an optical axis of the second lens, and is used for propping against the first propping surface.

The invention relates to a combined mould used for bulged bar prefabricated part forming. The combined mould comprises a first molding board and a second molding board, wherein slots perpendicular tothe length direction of the first molding board are formed in the first molding board; the slots communicate with the bottom side of the first molding board; baffle strips which are staggered with theslots are arranged on the second molding board; two notches for placing reinforcing steel bars are formed in one side of each baffle strip; the first molding board is combined with the second moldingboard to form an integrated molding board; and a first bar penetrating hole and a second bar penetrating hole for allowing the reinforcing steel bars to pass through are formed between each slot andthe corresponding baffle strip. After being combined, the mould is good in sealing property, and the holes for just allowing the reinforcing steel bars to pass through are formed in the formed integrated molding board, so that occurrence of leaked slurry is greatly reduced in comparison with waist-shaped holes in the prior art, building materials are favorably saved, and a prefabricated componentwith uniform components is obtained; molding and de-molding are convenient, de-molding difficulty is reduced, and de-molding efficiency is greatly improved; acting force on each molding board is relatively small in a molding process and a de-molding process; and moreover, structural strength of the molding boards is high, so that the molding boards are not liable to damage, and using and maintaining cost of the mould is reduced.

The invention provides an autoclave die for forming parts with reinforcing ribs. The autoclave die comprises a die main body, a border and a boss group, wherein the die main body is provided with an annular groove and a rectangular groove; the border is embedded in the annular groove; the border and the boss group are provided with die release bolt holes, and further provided with fastening bolt holes; die release bolts are arranged in the die release bolt holes, and fastening bolts are arranged in the fastening bolt holes; the boss group is embedded in the rectangular groove, and comprises more than two bosses; and each boss is provided with an upper die release corner above the upper surface of the die main body, and provided with a lower die release corner below the upper surface of the die main body. According to the autoclave die, the boss group and the die main body are of a separated structure and can be independently detached, and during die release, the parts can be separated from the die main body with the boss group, thus die release difficulty for the parts with reinforcing ribs is greatly reduced; and the boss group is capable of controlling the dimensional accuracy of the holes, and the border is capable of controlling the overall dimensions of the parts, so that after-treatment is not required for the formed parts.

The invention provides a spiral pulling-out type demolding tool for composite products and a demolding process thereof. The demolding tool comprises a spiral pulling-out assembly, a positioning assembly and a fixed part assembly, wherein the spiral pulling-out assembly is used for drawing a metal baffle, the positioning assembly is used for fixing the current position of the metal baffle, and the fixed part assembly is used for fixing a composite product, and the three assemblies are sequentially respectively fixed on a metal substrate. According to the demolding process based on the demolding tool, a stable tensile force is provided by using a screw rotating device, a stable vertical pulling-out force is applied to the metal baffle in the product, and finally, the metal baffle clamped in the composite product is perfectly taken out.

The invention provides a mold of a worm with gears. The mold of a worm with gears comprises an upper mold with a thread injection molding cavity and a lower mold with a gear injection molding cavity; the upper mold is internally provided with a first insert; the thread injection molding cavity is arranged in the first insert; the first insert is rotatably arranged in the upper mold; the thread injection molding cavity is arranged in a rotatable first insert; when in demoulding, the first insert in the rotatable mold can be rotated to enable a screw part of a worm with gears to be demoulded smoothly, so that a thread injection molding product can be demoulded directly for the mold depending on the structure of the mold, and the demoulding difficulty is lowered; a push plate is arranged between the upper mold and the lower mold; the push plate is provided with a connecting part containing cavity for connecting the thread injection molding cavity and the gear injection molding cavity; the end part of the worm with gears is of a gear structure, therefore, a push plate structure is arranged in demoulding, and demoulding push force is applied to gear parts of the push plate structure in demoulding, so that products can be demoulded easily.

The invention discloses a plastic well injection molding device with a wall thickness adjusting function, and relates to the technical field of plastic well injection molding, the plastic well injection molding device comprises a feeding assembly, an outer mold, an inner mold, a thickness adjusting assembly, a cooling assembly, a lower rack and a discharging assembly, the feeding assembly, the outer mold and the lower rack are in fastening connection, and the inner mold and the outer mold are in fastening connection; one end of the thickness adjusting assembly is arranged on the inner surface of the outer mold, the other end of the thickness adjusting assembly is arranged on the outer surface of the inner mold, one end of the cooling assembly is fixedly connected with the lower rack, and the other end of the cooling assembly is embedded into the outer mold and the inner mold. According to the feeding assembly, temperature difference energy is converted into continuous vibration energy, the uniform heating effect of injection molding materials is promoted, the heating speed is increased, and energy loss is reduced. The wall thickness of the plastic well can be intelligently adjusted through the thickness adjusting assembly, and products of various specifications can be produced through one forming device.

The invention relate to a tool and production method for producing a variable cross-section type I-shaped composite part. According to the technical scheme, the tool is composed of an upper male die, a lower male die, a middle spacer plate and composite even pressing plates on the two sides. The production method comprises the steps that firstly, the composite even pressing plates are made; then, carbon fiber prepregs cut into fixed sizes are laid on a forming tool; finally all parts of the carbon fiber prepregs laid well are transferred from the forming tool to an assembly solidification tool for integral assembly, and packaged in a vacuum bag; the fully sealed prepreg blank is subjected to solidification forming under the conditions of 120-180 DEG C and 0.3-0.8 mpa for 1-3 hours; and after cooling, the composite even pressing plates, the middle spacer plate, the upper male die and the lower male die are detached to obtain the variable cross-section type I-shaped composite part. According to the production process, the pressure transmission efficiency of the part in the solidification process can be improved; generation of the structure defect of the part is reduced; the shape and the internal quality of the part are ensured.