40results about How to "Improve core making efficiency" patented technology

The invention relates to a manufacturing device of a knock-off core and a manufacturing method thereof. One side above a stand is provided with a sand ejecting cylinder, the sand ejecting cylinder is connected with a sand ejecting tube, the middle part above the stand is provided with a resetting cylinder controlled by a 14-station rotating mould, a rotating shaft is arranged below the resetting cylinder, the other side above the rack is provided with a positioning cylinder, a working platform is arranged below the positioning cylinder, and the front end part above the stand is provided with a pusher-type cylinder. By adopting the special 14-station knock-off core manufacturing device which has simple operation, low manufacturing cost and stable operation and can realize continuous automatic production in the invention, the production requirements can be met, the core production efficiency is improved, the production speed of the knock-off core is improved to one piece per six secondsfrom one piece per two minutes, the working efficiency is improved by nearly 20 times, the electricity consumption is saved by 1 / 3, the quality of the knock-off core is ensured, and the labour intensity of workers is reduced.

The invention relates to a silicate inorganic binder for casting and a method for preparing the silicate inorganic binder for casting. The silicate inorganic binder for casting consists of crystalline water-contained sodium metasilicate, boric acid, sodium tripolyhosphate and an organic modifier. The silicate inorganic binder for casting is high in binding property, long in storage time, nontoxic and harmless and low in cost; the inorganic binder prepared by the method is high in wettability and binding property; and the molding sand made by the silicate inorganic binder is high in flowability, low in gas forming property, long in storage time and high in applicability, and the old sand can be recycled.

The invention discloses a ventilation cooling sand core for casting a cylinder jacket of a diesel engine. The ventilation cooling sand core comprises a core shell, a core bar and a ventilation rope, wherein the core bar comprises a sleeved inner steel pipe and a longer outer steel pipe; the upper ends of the inner steel pipe and the outer steel pipe are fixed together with a first ring-shaped steel plate; multiple upper vent holes are arranged at the upper end of the inner steel pipe; the lower end of the inner steel pipe is fixed together with the upper surface of a second ring-shaped steel plate; the inner opening of the second ring-shaped steel plate is downward connected with a hopper-shaped conical steel pipe and provided with multiple lower vent holes; a bottom sealing plate is fixed at the lower end of the outer steel pipe; a cold air cavity is formed among the outer steel pipe, the bottom sealing plate and the hopper-shaped conical steel pipe; the central inner ring of the first ring-shaped steel plate is upward fixedly provided with a first steel pipe; the first steel pipe, the inner steel pipe and the hopper-shaped conical steel pipe form an insertion channel of a cooling ventilation pipe; and the space among the lower vent holes, the inner steel pipe and the outer steel pipe and an upper air outlet form a hot air channel. According to the invention, the core manufacturing efficiency is improved, the qualification rate of the cylinder jacket is increased, the quality of the cylinder jacket is stabilized, and the production cost is lowered.

The invention relates to a method for producing resin, and particularly relates to a method for producing casting cold-box resin. The method comprises the following steps: adding dissolved industrial phenol to a reaction kettle; starting an agitator; adding solid paraformaldehyde, a regulator and 0.08-0.12% of metal ion catalyst; opening a steam valve, slowly heating up, and heating up to 105 DEG C within 40-50 minutes; keeping constant temperature at 105-108 DEG C for 30 minutes; heating up to 112 DEG C within 10-20 minutes, and keeping constant temperature at 112-115 DEG C for 50 minutes; continuing to heat up and dewatering under normal pressure after heat preservation is finished; timing constant temperature when the temperature inside the kettle ascends to 120 DEG C, and keeping constant temperature at 120-123 DEG C for 30 minutes; after constant temperature is finished, vacuumizing and continuing to dewater; stopping dewatering when the total dewatering amount achieves 60% of formaldehyde amount; adding a polar dibasic acid ester, nonpolar high-boiling point solvent oil and a modifier; agitating for 60 minutes; adding an enhancer when cooling to below 40 DEG C; evenly agitating, detecting and packaging. The casting cold-box resin which is low in viscosity, and high in casting sand strength, can be used for a long period of time, and meets core-making production in batches is provided by the invention.

The invention discloses a vertical and horizontal composite core box for simultaneously preparing a water jacket core and an oil duct core. The vertical and horizontal composite core box comprises a vertical and horizontal composite a jacket core mold, an oil duct core mold, a sand shooting mechanism and a core ejection mechanism, wherein the water jacket core mold comprises a lower core box, an upper core box which is arranged above the lower core box and forms a core box cavity with the lower core box, and a first core ejection hole which is formed in the bottom of the lower core box and communicated with the core box cavity; the oil duct core mold comprises a static mold arranged on the outer side of the lower core box and / or the upper core box, a movable mold which is arranged on the outer side of the static mold and forms a mold cavity with the static mold, and a second core ejection port which is arranged on the inner side of the static mold and is communicated with the mold cavity. The number of the prepared molds is reduced, the cost of the mold, the production time and labor force are saved, and the core preparation efficiency is greatly improved. Moreover, the surface quality of the oil duct core is improved, and the ramming degree of the oil duct core is improved.

The invention discloses a rapid core-making mechanism. The rapid core-making mechanism comprises a core box device, a sand-shooting device and a blowing / core-ejecting device, wherein sand-shooting holes and blowing / core-ejecting holes are arranged in the top wall of the core box; the sand-shooting holes and the blowing / core-ejecting holes are arranged in a staggered manner; the sand-shooting device is arranged above the top wall of the core box in a vertically moving manner and a sand-shooting plate is provided with sand-shooting nozzles; the blowing / core-ejecting device is fixedly arranged above the top wall of the core box and a blowing plate is provided with avoidance holes; blowing / core-ejecting rods penetrating through the blowing / core-ejecting holes are arranged on the lower side surface of the blowing plate; and the sand-shooting nozzles are located above the avoidance holes or sequentially penetrate through the avoidance holes and the sand-shooting holes. Through simultaneous arrangement for the sand-shooting holes and the blowing / core-ejecting holes in the top wall of the core box, and fixed arrangement for the blowing plate above the core box device, the blowing / core-ejecting device has no need to transversally move and vertically move, and the sand-shooting mechanism has no need to transversally move, thus the time of idle loops is reduced, the core-making efficiency is improved, and core-making equipment is omitted. The invention further provides a rapid core-making method.

The invention discloses an inserting-type sand blasting nozzle used for hot box flexible installation. The inserting-type sand blasting nozzle comprises a hot box sand blasting nozzle installation welding block (6), a sand blasting plate (1) which is welded with the welding block, a sand blasting nozzle cap (3), a sealing ring (4) and a sand stopping block (5). The inserting-type sand blasting nozzle is characterized in that the upper portion of a sand blasting nozzle body (2) is provided with a flange plate or an unthreaded rod, and the lower portion of the hot box sand blasting nozzle installation welding block (6) is provided with a groove matched with the flange plate or the unthreaded rod on the upper portion of the sand blasting nozzle body; the inner diameter of the groove is larger than that of the flange plate or the unthreaded rod by 1-2mm; and the sand blasting nozzle body, the welding block and the sand blasting plate are fixedly connected into a whole at the outer side of the groove through a screw (7) and a sand blasting nozzle limiting ring (8). By means of the inserting-type sand blasting nozzle used for hot box flexible installation, core-making efficiency of a hot box is improved, and by the adoption of a standard component connecting mode, the structure is simple and deflection is small; on one hand, the problems that an inserting-type sand blasting nozzle is prone to deformation and short in service life are solved; and on the other hand, the defects that the existing inserting-type sand blasting nozzle is large in using quantity of materials, high in installation structure manufacturing difficulty and low in efficiency are overcome.

The invention relates to a universal sand shooting plate. The universal sand shooting plate is characterized in that the universal sand shooting plate sequentially comprises a limiting baffle (1), a support (2) and a sand shooting plate main board (3) from top to bottom; a gap exists between the limiting baffle (1) and the support (2); a gap exists between the support (2) and the sand shooting plate main board (3); a circle of connection bolt holes (7) are formed in the edge of the sand shooting plate main board (3) which is provided with a plurality of sand shooting holes (8) arranged in an array manner; the support (2) is provided with screw holes with the positions corresponding to those of the sand shooting holes in the sand shooting plate main board (3); closing screwed plugs (9) are rotationally arranged in the sand shooting holes (8); and adjusting screwed plugs (10) are formed in the screw holes of the support (2). The universal sand shooting plate has the beneficial effects the sand shooting pressure can be adjusted, the core manufacturing quality and the production efficiency are improved, the mold opening time is saved, and cost is saved.

The invention discloses a sand core mould of an air cooler sand core in a large diesel engine. The sand core mould comprises an upper core box, a lower core box and a plurality of side surface loose pieces, wherein the upper core box is provided with an upper cavity of the air cooler sand core; a lower cavity of the air cooler sand core, which is matched with the upper cavity of the upper core box and is provided with a plurality of yielding loose piece-shaped surfaces, is formed in the lower core box; the side surface loose pieces are arranged in the yielding loose piece-shaped surfaces of the lower core box. According to the mould, the structure is simple and reasonable, each core box is made of a cast iron material, the shape of the periphery of the core box is designed to be matched with the sand core, and the total weight of the mould can be reduced and the manufacturing cost can be saved while the strength of the core box is guaranteed and the deformation is prevented; the local part of the core box adopts a loose piece structure, so that the problem that the sand core cannot be smoothly demoulded is effectively solved, the operation is convenient and flexible, and the core-making efficiency is high; moreover, the made sand core is small in deformation and good in sizing precision.