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

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 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 an engine cylinder block water channel sand core and a preparation process thereof, and belongs to the technical field of engine part casting. The engine cylinder block water channel sand core is prepared from the following components in parts by weight: 70-80 parts of quartz sand, 20-30 parts of chromite sand, 0.5-1 part of iron oxide powder, 0.75-0.85 part of a rein component I, and 0.75-0.85 part of a rein component II. The engine cylinder block water channel sand core has the following advantages that (1) the sand penetration and veining preventing capacity is high,the molten iron pouring amount of a casting is 350 KG, the pouring temperature is 1380-1400 DEG C, an inner cavity of a water channel is free of the sand penetration and veining defects, collapsibility is good, clearing is easy, and the cleanliness of the inner cavity is good; and (2) the core manufacturing efficiency of a cold-box preparation process is high, a triethylamine catalytic curing process is used, the core manufacturing efficiency is high, and the engine cylinder block water channel sand core is suitable for large-scale production.

The present invention relates to an upward ejection core rod, particularly to an upward ejection core rod for a cold core box mold, wherein the upward ejection core rod has a characteristic of easy replacement. The upward ejection core rod comprises a rod body, wherein both sides of the rod body are processed with external threads, the left end of the rod body and a screw cap form a threaded connection, a string washer is arranged between the screw cap and the rod body, and the right end of the rod body and a nylon rod form a threaded connection. According to the upward ejection core rod, both ends of the upward ejection core rod are additionally provided with the screw cap and the nylon rod, the nylon rod is placed in a easy-wear position, and threaded connection fastening is adopted, such that a fault rate of the upward ejection core rod is substantially reduced, a service life of the core box is prolonged, replacement operation is simple after the nylon rod wears, and a time is saved; and the screw cap is adopted to arrange the upward ejection core rod on the upward ejection core plate so as to solve the problem of easy falling of the upward ejection core rod, such that core box damage caused by the upward ejection core rod due to easy falling can be effectively prevented, a service life of the mold can be prolonged, and core preparation efficiency can be effectively increased.

The invention discloses a cold core or inorganic core manufacturing method and a cold core or inorganic core manufacturing machine. In the cold core or inorganic core manufacturing method, the initial position and the stop position of an upper core box is are the middle position below a core ejection rod of an air blowing / core ejection mechanism; one scheme is as follows: with a lifting type machine, a lower moving trolley drives a lower core box to a lower mold opening position, an upper moving trolley synchronously drives a sand ejection mechanism to a sand ejection position and drives the air blowing / core ejection mechanism to an air blowing / core ejection transit position; when the air blowing / core ejection mechanism ejects a core, a lifting work platform synchronously drives the lower core box to move downwards to the lower mold opening position, and a lifting mechanism delays to synchronously drive the upper core box to move downwards to the middle position; in a cold core or inorganic core manufacturing machine, a middle position space and a mold opening position are formed from top to bottom between the lower end of the core ejection rod of the air blowing / core ejection mechanism and the upper end surface of the lower core box, so that the idle loop time is saved, the equipment waste is reduced and the core manufacturing efficiency is improved.

The invention discloses an ultra-large type manual core box mold of a v-type engine cylinder body, belongs to the technical field of sand mold casting, and solves the problem that an existing manual core box mold is not easy to demold. The core box mold comprises a bottom mold and a side mold assembly, wherein the side mold assembly comprises a first side mold, a second side mold, a third side mold and a fourth side mold which are split, the second side mold is arranged on one side of the bottom mold, the fourth side mold is arranged on the other side of the bottom mold, the first side mold and the third side mold are clamped between the two sides of the second side mold and the fourth side mold correspondingly, a pattern area is arranged in an area surrounded by the first side mold, the second side mold, the third side mold and the fourth side mold, and a plurality of split-type patterns are arranged in the pattern area. According to the core box mold, the sand core quality and precision can be effectively improved. The invention further discloses a core making method. The method is used for core making, so that the on-site operation convenience can be ensured.

The invention relates to the technical field of casting, in particular to molding sand suitable for a wet core during malleable iron pipe fitting casting. The molding sand is prepared from the following components of, in percentage by mass, 45%-55% of old sand, 35%-45% of fresh sand, 5%-8% of bentonite, 0.1%-0.4% of starch, 0.1%-0.4% of coal powder and 1%-3% of water. The fresh sand and the old sand are sequentially added into a sand mixer according to a ratio, then the coal powder and the bentonite are added, then the starch is added, finally the water is added, stirring is carried out in thesame direction, and after all the components are uniformly stirred, the molding sand is obtained. The molding sand can be used for core producing for the wet core, and the prepared wet core is high in reusability and strong in binding force. The wet core prepared by the molding sand is high in wet pressure strength, and good in collapsibility and good in air permeability after casting. The use ofthe core iron is cancelled, the waste of the core iron material is avoided, a sorting core iron working procedure is not needed, and the core making efficiency is further improved.

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 discloses a lifting and returning device of a lower ejecting core plate. The lifting and returning device comprises lifting rods, lifting rod locking nuts and returning springs, wherein each lifting rod comprises a bolt head and a screw rod and can penetrate through the lower ejecting core plate in a sliding manner, the bolt head stops at the bottom surface of the lower ejecting core plate, and the screw rod is fixedly arranged in a lower core box in a penetrating manner; the lifting rod locking nut is adaptively screwed with one end of the screw rod, extending out of the lower core box; the returning spring is arranged on the screw rod of the lifting rod in a penetrating manner; the upper end of the returning spring is butted with the bottom surface of the lower core box and the lower end of the returning spring is butted with the top surface of the lower ejecting core plate. The lifting and returning device disclosed by the invention has the advantages that the structure is simple and reasonable; the returning device is arranged between the lower core box and the lower ejecting core plate, and the lower ejecting core plate can be automatically returned in time, so that the operation of a core box mold is stable, the core manufacturing efficiency is high, the core manufacturing quality is good and the service life of the mold is long.

The invention relates to a positioning and taking-out device for movable types in a die cavity. The positioning and taking-out device comprises a die, the movable types, positioning grooves, positioning magnets and a strong magnetism handle. The positioning groove is formed in the die cavity. The positioning magnets are arranged at the bottoms of the movable types, the movable types are arranged in the positioning grooves, and the strong magnetism handle is used for taking the movable types arranged in the positioning grooves out. According to the provided positioning and taking-out device for the movable types in the die cavity, the ordinary magnets are used for positioning the movable types, it can be guaranteed that the movable types are not brought out by a sand core in the normal core manufacturing process, the complex procedures that when core manufacturing and drawing are conducted every time, the movable types are brought out, and installation needs to be conducted again are reduced, the powerful magnets are used for taking out the movable types, flexible replacement of the movable types in the die cavity is achieved, field operation is convenient, and the core manufacturing efficiency is improved.

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 mould of a high-temperature cooler sand core in a large diesel engine. The mould comprises a core box outer frame, a core box wear-resistant piece and a plurality of side surface loose pieces, wherein the core box outer frame comprises a bottom plate and a side wall extending upwards along the periphery of the bottom plate, the bottom plate and the side wall define a cavity of the high-temperature cooler sand core, and a plurality of yielding loose piece-shaped surfaces are arranged at the periphery of the cavity; the core box wear-resistant piece is designed to be matched with the top end of the side wall of the core box outer frame in shape and is fixedly arranged at the top end of the side wall of the core box outer frame; the side surface loose pieces are arranged in the yielding loose piece-shaped surfaces of the core box outer frame, and the inner side surfaces of the side surface loose pieces define a cavity side wall of the core box outer frame. According to the mould, the total weight of the mould can be reduced, the manufacturing cost can be saved, and the labor intensity can be lowered; a core box adopts a full-fall type loose piece structure, so that the mould can be released from a plurality of angles, the problem that the sand core cannot be smoothly demoulded is effectively solved, the operation is convenient and flexible, complete demoulding can be achieved, and the core-making efficiency is high; moreover, the made sand core is small in deformation and good in sizing precision.

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.

A stick type casting sand core box comprises a positioning bottom plate, a positioning top plate and a spliced type positioning side wall. The upper surface of the positioning bottom plate is provided with a lower positioning groove, the lower surface of the positioning top plate is provided with an upper positioning groove, and the spliced type positioning side wall is a hollow cylinder. The top of the spliced type positioning side wall is embedded into the upper positioning groove of the positioning top plate, and the bottom of the spliced type positioning side wall is embedded into the lower positioning groove of the positioning bottom plate. The spliced type positioning side wall comprises a plurality of pieces of core iron, the core iron is provided with an arc-shaped body, the core iron is arrayed in the circumferential direction to form the spliced type positioning side wall, and the adjacent core iron does not make contact so that receding gaps can be formed. According to the core box, by manufacturing the blocky and independent core iron, the core box structure is simplified, placement of a large number of chilling blocks in the core manufacturing process is avoided, and the core manufacturing efficiency is improved. The core iron has the effect of the chilling blocks and forms the side wall of the core box, and a double beneficial effect is achieved.

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.