72 results about "Resin casting" patented technology

The utility model relates to the technical field of composite material casting, and discloses a high-temperature curing thermosetting resin casting body forming device which comprises a supporting assembly, a mold assembly and a temperature control assembly. The supporting assembly is used for clamping and supporting the mold assembly. The mold assembly comprises a left heating plate, a right heating plate, a left mold plate, a right mold plate, a bow-shaped clamp, a plug piece and a U-shaped frame, a temperature measuring hole is formed in the top of the left mold plate or the right mold plate, the U-shaped frame is clamped by the left mold plate and the right mold plate through fastening bolts, the left mold plate and the right mold plate are clamped by the left heating plate and the right heating plate on the left side and the right side, and the plug piece is plugged into the left side, the right side and the bottom of the U-shaped frame. The temperature control assembly comprises a thermocouple and a temperature controller which are arranged in the temperature measuring hole. According to the utility model, the structure is simple, no special equipment is needed for curing in the curing process, the curing process at the outlet of the U-shaped frame can be conveniently observed through naked eyes, the curing process is immediately adjusted, bubbles in a casting body are reduced as much as possible, and the quality of the casting body is improved.

The invention belongs to the field of transformer wire outlet structures, and particularly discloses an integrated transformer for a power distribution area, which comprises an oil tank, a three-phase coil arranged in the oil tank, a low-voltage bushing group and a high-voltage bushing group arranged outside the oil tank, and a wire outlet assembly connected with the three-phase coil, the high-voltage bushing comprises an A-phase bushing, a B-phase bushing and a C-phase bushing which are arranged on the oil tank cover, and the structures and the arrangement modes of the A-phase bushing, the B-phase bushing and the C-phase bushing are the same; and a pressure plate is arranged between the A-phase sleeve and the tank cover of the oil tank, the pressure plate is a circular fixing piece with an opening, and the opening of the pressure plate is arranged downwards. According to the invention, the high-voltage outgoing line adopts the plug-in type one-way sleeve, the low-voltage outgoing line adopts the resin casting type dry sleeve, the all-insulation and all-shielding effects are realized, the influence of external pollution conditions is avoided, and the probability of flashover discharge of the line is reduced; risks of personal injury caused by man-made electric shock and faults are reduced, and power supply reliability and operation safety are improved.

The utility model relates to a current transformer which comprises a coil assembly, an epoxy resin casting body, a P1 wiring copper bar and a P2 wiring copper bar, the coil assembly comprises an annular iron core, a coil winding arranged on the annular iron core and a hoisting support, one end of the hoisting support is provided with a supporting piece, the supporting piece is fixed on the coil winding through a ribbon, and the annular iron core is arranged on the annular iron core. One end of the hoisting support is provided with a coil winding, the other end of the hoisting support is provided with a hoisting plate connected with a pouring mold, two hoisting holes are symmetrically formed in the hoisting plate, two copper inserts connected with the pouring mold are arranged at the positions, corresponding to the two hoisting holes, of the hoisting plate, and the coil winding is connected with the P1 wiring copper bar and the P2 wiring copper bar through two primary leads. The coil winding, the annular iron core and the hoisting support are poured into a whole through epoxy resin to form the epoxy resin pouring body. The utility model has the advantages of compact structure, stable and reliable performance, good insulating property, low partial discharge and high production efficiency.

The invention relates to the technical field of pouring materials, in particular to an epoxy resin pouring material and a preparation method and application thereof. The component A is prepared from the following raw materials in parts by mass: 30 to 50 parts of matrix resin, 1 to 5 parts of diluent, 0.3 to 1.5 parts of first aid, 2 to 10 parts of first flexibilizer and 20 to 75 parts of first filler; the component B is prepared from the following raw materials in parts by mass: 25 to 50 parts of curing agent, 0.2 to 1 part of second aid, 5 to 20 parts of second toughening agent, 20 to 85 parts of second filler and 0.1 to 1 part of accelerant. The prepared epoxy resin castable has good settling resistance and flowability, and the problems of material shortage and difficulty in permeation in the pouring process are solved; in addition, Tg, bending performance and tensile performance all meet the target, and the vacuum pouring device is suitable for vacuum pouring scenes of dry-type transformer coils and mutual inductors.

The invention relates to a novel transition tank for pouring low-viscosity epoxy resin, and belongs to the technical field of production and processing of insulating parts, the novel transition tank comprises a support and a tank body mounted on the support, the tank body is a transparent tank, an injection port is formed in the middle of the top end of the tank body, and a vacuumizing pipe is further arranged at the top of the tank body; a heater, a degassing barrel, degassing rings and a degassing umbrella are respectively arranged in the tank body, the heater is arranged in the middle of the degassing barrel, and a plurality of degassing rings are arranged in the degassing barrel. The tank body is made of organic glass or high borosilicate glass, the U-shaped heating pipe is arranged in the middle of the degassing barrel, and heat is diffused from inside to outside. The heat conductivity coefficient of the tank body made of organic glass or high borosilicate glass is 50 times lower than that of the tank body made of a metal shell in the prior art, the heat preservation effect is greatly improved, and the heat efficiency is improved.

A platform or staircase comprising a plurality of platform or staircase panels, characterized in that each panel comprises a composite material comprising: a plate-shaped main body made of natural stone with a thickness of 7 mm to 9 mm; a fabric arranged on the rear surface of the main body made of, in particular overlapping, glass fibers with a mass per unit area of ​​approximately 500 g / m 2 , a casting of epoxy resin filling the pores of the fabric and adjacent spaces, whereby natural stone, fabric and epoxy resin form a closed layer composite, wherein the composite panel is bonded to the landing or staircase via its back by means of a two-component polyurethane adhesive which expands by at least 100% of its applied volume after application and contains a reaction retarder with a delay time of 0.5 min to 5 min.

The utility model belongs to the technical field of steel rope tools, and particularly relates to a mold for a resin casting steel rope tool, which comprises a support plate, a fixing mechanism is arranged at the top end of the inner side of the supporting plate, a limiting mechanism is arranged on the bottom side of the fixing mechanism, a conveying mechanism is arranged at the bottom end of the inner side of the supporting plate, the fixing mechanism comprises a sliding rod, a cavity is formed in the inner side of a clamping plate, electrical bars are evenly fixed to the inner side of the cavity, and a cable joint body is fixedly clamped to the inner side of the clamping plate. A threaded rod is rotationally installed at the end, away from the sliding rod, of the inner side of the supporting plate, a servo motor is fixed to one corner of the side face of the supporting plate, the cable joint body is arranged on the inner sides of the clamping plates, the servo motor is controlled, the clamping plates on the two sides are pushed to slide inwards at the same time in the direction of the sliding rod, and the cable joint body is clamped and fixed through the clamping plates; the resin in the molten state is cast to the inner side of the rope joint body, so that the resin can be rapidly solidified, and the problems that an existing steel rope sling is poor in casting quality and low in efficiency are solved.

The present invention relates to the technical field of coatings, and discloses an environmentally friendly coating for green building exterior walls and a preparation method thereof. In the present invention, toluene-2,4-diisocyanate and hydroxypropionate phthalimide alkylamide are reacted, then reacted with epoxy resin, and neutralized; finally, water, emulsifier, defoamer, dispersant, pigment and filler are added to obtain the environmentally friendly coating for green building exterior walls. The water-based coating is clear and transparent, does not delaminate, has good dispersibility and excellent storage stability. And grafting flexible alkyl long chains into the epoxy resin can play a good toughening role, which is beneficial to improving the bending strength and impact strength of the epoxy resin casting body. Grafting the high-temperature resistant phenylimide ring group into the epoxy resin molecular chain can increase its initial thermal decomposition temperature, and has broad application prospects in the fields of high-performance heat-resistant, anti-ultraviolet and weather-resistant coatings, building exterior walls, etc.

The present application relates to the field of foundry, especially to a kind of organic resin foundry waste sand recycling equipment, including mounting frame, cylinder, limiting frame and drive unit etc.;Mounting frame is connected with drive unit. Drive unit is connected with cylinder. Drive unit is connected with limiting frame, and drive unit is used to drive cylinder to lift and rotate, and also used to drive limiting frame to move. Cylinder is installed with annular knife. Mounting frame is fixedly connected with sieve plate. Sieve plate is fixedly connected with fixing ring for positioning sand box. Mounting frame is fixedly connected with collecting hopper, and collecting hopper is located below sieve plate. Cylinder is connected with cleaning unit for cleaning casting wheel. The equipment breaks waste sand by rotating and applying downward pressure, makes it loose and falls down, after waste sand passes through sieve plate, it falls into lower collecting container through collecting hopper, at the same time, when brush plate one contacts with the upper surface of casting wheel, it can brush the upper surface and the upper surface of rib to clean and remove attached waste sand.

The present invention discloses an oscillating filling structure for casting a busbar, which is applied in the technical field of busbar casting. The present invention starts a double-headed servo motor to drive a crank connecting rod to rotate at high speed, and continuously stores and releases energy through a spring sheet, so that the transmission connecting rod can drive an oscillating connecting plate to vibrate left and right at high frequency. At the same time, the oscillating connecting plate continuously vibrates left and right at high frequency, and the vibration spring can be continuously compressed by a sliding rod and then rebounded, so that the vibration spring can also drive the sliding rod to slide up and down at high frequency inside a fixed cylinder, so that the casting mold can be set to vibrate at high frequency in the up and down and left and right directions, and realizes the setting of multi-directional oscillation and even shaking of the resin casting material of the busbar, so that the material is evenly filled into the busbar surface, reducing the defects on the surface of the busbar trough casting structure, and avoiding the occurrence of large bubbles inside the solidified resin material, and reducing the occurrence of small bubbles, thereby improving the quality of the busbar trough casting structure.

The invention discloses an epoxy resin casting winding demoulding device, comprising an operating table structure, a mounting platform movably arranged at a mounting groove of the operating table structure, two limit rods movably arranged at the mounting groove parallel to the mounting platform, and a driving structure arranged at the mounting groove and respectively connected to the mounting platform and the casting winding. The inner film is fixedly arranged on the mounting platform, and the driving structure drives the casting winding to move up to a preset height relative to the mounting platform, and then the two limit rods are moved and inserted into the bottom of the casting winding, and the casting winding is supported by the two limit rods. Finally, the mounting platform is driven to move down a certain distance relative to the casting winding to realize the demoulding operation of the casting winding and the inner film. The demoulding device greatly reduces the demoulding time and saves the use of a workshop crane, which not only improves the safety factor of the demoulding operation, but also ensures the product quality. It is easy to operate and use, and improves the demoulding work efficiency.

The invention provides a cleaning method for an epoxy resin pouring mold, and belongs to the technical field of high polymer material processing.The cleaning method for the epoxy resin pouring mold comprises the following steps that a mold with epoxy resin residues is placed in a closed freezing cabin; a liquid nitrogen refrigerating system is started; starting a medium injection system, and performing multi-angle injection on the mold cavity by using the pre-cooled non-metal medium; in the spraying process, the local temperature gradient is monitored in real time through a micro thermocouple array pre-buried in the mold body, and liquid nitrogen spraying in the corresponding area is reduced or suspended; after spraying is finished, the mold sinks to enter a warm area in the cabin, the surface temperature of stripped chippings is increased to be higher than the glass-transition temperature Tg of the chippings to be softened and lose viscosity, and then the chippings rise to a cold area again; the stripped chippings and the medium mixture are separated through a three-stage online classifier at the cabin bottom; the problems that in the cleaning process of the epoxy resin pouring mold, the mold precision is damaged, the cleaning efficiency and reliability are insufficient, the operation cost is high, and the environmental protection property is poor can be solved.

The invention discloses equipment for preparing an epoxy impregnated paper sample, the equipment comprises a mold, an epoxy resin casting material and a vacuum oven, the mold comprises two groups of symmetrically arranged mold main bodies, and the two groups of mold main bodies are fixed by fasteners; pouring cavities are formed in the opposite sides of the mold main bodies, tightened crepe paper is clamped between the two mold main bodies, two sample electrodes are symmetrically arranged in the two pouring cavities, and pouring intervals are formed between the opposite ends of the two sample electrodes and the crepe paper; the epoxy resin pouring material is vacuumized in the vacuum oven and then poured into the pouring cavity; and the mold poured with the epoxy resin pouring material is vacuumized in a vacuum oven. By utilizing the equipment disclosed by the invention, the stretching state of the crepe paper can be effectively controlled, the introduction of bubbles is reduced, a test sample with equivalent insulation characteristics with an actual epoxy impregnated paper sleeve is prepared, and a technical support is provided for accurately evaluating the related performance of an epoxy impregnated paper insulating material.

The utility model discloses an epoxy resin pouring dry-type phase-shifting transformer mould, which comprises a pouring outer mould, a pouring inner mould, a pouring outer mould, a pouring inner mould and a pouring outer mould, and is characterized in that the pouring outer mould comprises a first inclined part, an arc part and a second inclined part; the wire outlet sealing plate is connected with the first inclined part and the second inclined part; the mold defined by the pouring outer mold and the outgoing line sealing plate is arranged on the secondary winding of the phase-shifting transformer in a sleeving mode, the outgoing line sealing plate is connected with the arc part through the first inclined part and the second inclined part, and compared with a traditional mode that the outgoing line sealing plate is directly located in the tangential direction of an arc structure, the space between the outer surface of the secondary winding and the outgoing line sealing plate can be enlarged; and lead arrangement during die filling is facilitated.

The invention provides a method for preparing a continuous-length fluororesin casting film, which comprises the following steps of: arranging a plurality of dipping tanks which are arranged in sequence and are filled with fluororesin emulsion, enabling a continuously moving metal mold belt to pass through the dipping tanks in sequence for dipping, and coating the fluororesin emulsion on the surface of the metal mold belt after dipping each time; after the coated metal mold belt leaves each dipping tank, drying treatment and roasting treatment are carried out on the metal mold belt; the dipping, drying treatment and roasting treatment processes are repeated until the metal mold belt is dipped in the last dipping tank and subjected to drying treatment and roasting treatment, the continuous-length fluororesin film is obtained, and before the metal mold belt is dipped for the first time, texturing treatment is conducted on the edge areas of the two sides of the metal mold belt through laser. The method can be used for producing the fluororesin film with the thickness of more than 50 microns, is high in automation degree, low in labor intensity and suitable for industrial production, avoids the generation of waste residues and scraps through laser treatment, and simplifies the process and equipment.

The utility model discloses a cable joint of a water immersion prevention low-voltage cabinet, which relates to the technical field of low-voltage cabinets and comprises a first resin casting sleeve which is formed on a shell of the water immersion prevention low-voltage cabinet in a casting manner, a wiring busbar is embedded in the first resin casting sleeve, and two ends of the wiring busbar protrude out of the first resin casting sleeve; the wiring terminal is provided with a busbar connecting end and a cable connecting end, the busbar connecting end is fixedly connected with one end of the wiring busbar, and the cable connecting end is fixedly connected with a cable outside the cabinet; and the second resin casting sleeve and the first resin casting sleeve are connected into a whole, and the second resin casting sleeve wraps one end, connected with the wiring terminal, of the wiring busbar, the wiring terminal and part of the cable outside the cabinet. According to the utility model, the waterproof connection of the cable outside the cabinet can be realized without plugging a waterproof connector, and the connection cost of the cable outside the cabinet can be reduced.

The application discloses a method for preparing an epoxy resin casting body by using a roll pressing-laminating method, utilizes a double roll mill to dynamically adjust the opening temperature, roll speed and interval of the double roll, and presses the epoxy resin blank with a single layer thickness; the single layer epoxy resin is laminated and pre-compacted by using a handheld roller; the laminated epoxy resin is placed on a hot press to perform a multi-stage hot pressing procedure of low-temperature medium-pressure, temperature rising and pressure releasing and high-temperature high-pressure; the compacted epoxy resin sheet is scribed to the target casting body shape, and is placed in a casting body mold after being cut; the program curing in the oven is performed; and the sample is obtained after being polished after demolding. The three-stage degassing is performed by roll pressing-laminating-pre-compacting-hot pressing, the bubble residue is reduced from the source, the apparent defects are few, and the dispersion coefficient of the mechanical test of the casting body is greatly reduced.

The present invention relates to the technical field of resin matrix composite material forming, and particularly relates to a resin casting body preparation device and a preparation method thereof. The device includes a mold, a pressure diaphragm, a pneumatic pipeline, a gas source device, an electro-pneumatic proportional valve and a controller. The mold has a forming cavity and a side mold pressure cavity, and the mold has a resin injection pipeline interface hole for injecting resin into the forming cavity from the resin injection pipeline interface hole; the pressure diaphragm is used to isolate the forming cavity and the side mold pressure cavity and deform under a certain pressure; the pneumatic pipeline guides gas to flow into or out of the side mold pressure cavity; the gas source device is connected to the pneumatic pipeline and is used to input gas into the pneumatic pipeline; the electro-pneumatic proportional valve is arranged on the pneumatic pipeline and is used to control the pressure of the side mold pressure cavity according to an electrical signal; the controller controls the opening degree of the electro-pneumatic proportional valve in the pneumatic pipeline; the purpose is to solve the safety problems in the current resin casting body preparation process and reduce the internal pores of the prepared resin casting body.

The utility model discloses an anti-cracking epoxy pouring coil structure of a dry-type transformer, which can improve the internal stress distribution of resin and a conductor and enhance the mechanical strength of a pouring coil. Specifically, a framework formed by the glass fiber grids inside and outside the coil can effectively prevent resin on the surface of the transformer coil from cracking during production and operation of the cast coil, the grids are filled with the air channel ribs, and the glass fiber tubes outside the air channel are filled with the air channel ribs, so that the stress effect generated by expansion caused by heat and contraction caused by cold during operation of the coil can be borne; the air passage ribs are prevented from cracking; the coefficient of expansion caused by heat and contraction caused by cold of the resin filled with the glass fiber grid is closer to that of the conductor, so that gaps between the resin and the conductor during operation are avoided. The resin casting coil adopting the structure can reliably operate in a normal-temperature region, can be stored for a long time in a low-temperature region, and can rapidly operate in a full load without cracking at a lower temperature.

The application discloses a rock-like test piece with pre-embedded seepage channels and / or water gushing cavities and a preparation method thereof, and aims to solve the technical problem that the existing simulation test piece cannot truly simulate and clearly and visually observe the influence of water seepage in seepage channels and / or water gushing in water-rich cavities on surrounding rock and lining structure inside rock mass. The application uses high brittleness and transparency resin casting to simulate engineering rock mass, and embeds a tunnel and a model with pre-embedded seepage channels and water gushing cavities in the engineering rock mass based on an engineering site. The obtained rock-like test piece has the characteristics of transparency, easy observation, realization of various working condition combinations, high brittleness of rock, etc., can clearly observe the evolution law of seepage and water gushing under the action of load, and can be used for the research on the seepage mechanism of original seepage channels and the water gushing mechanism of water-rich cavities.

The utility model relates to the technical field of epoxy resin castable production, and discloses a powder adding device for epoxy resin castable production, which comprises a material tank, a mixing mechanism is arranged on the surface of the material tank, a quantitative feeding mechanism is arranged at the top of the material tank, and a supporting seat is fixedly connected to the bottom end of the surface of the material tank. Bottom feet are fixedly connected to the bottom of the supporting seat, a discharging valve is fixedly connected to the bottom of the material tank, a discharging pipe is fixedly connected to the bottom of the discharging valve, the mixing mechanism comprises a motor frame, after all raw materials are added into the material tank, the mixing mechanism is started, an output shaft is driven by a motor to rotate, and the raw materials are mixed and processed through a stirring plate; in the mixing process, cakes are crushed through crushing frame strips, the cakes are prevented from influencing the mixing efficiency, meanwhile, a scraping plate is tightly attached to the inner wall of the material tank through the acting force of a telescopic column and a spring, raw materials on the inner wall of the material tank are scraped, uneven mixing caused by attachment is prevented, and the mixing efficiency of the device is improved.

The invention discloses a preparation method of a deep-eutectic solvent / epoxy resin composite self-repairing anticorrosive coating, and belongs to the technical field of functional coatings, the preparation method comprises the following steps: uniformly stirring and mixing a hydrogen bond donor and a hydrogen bond acceptor to obtain a hydrophobic deep-eutectic solvent; uniformly stirring and mixing a siloxane modified epoxy resin monomer and a curing agent to obtain a siloxane modified epoxy resin casting film solution; adding a hydrophobic eutectic solvent into the siloxane modified epoxy resin membrane casting solution, stirring and mixing to obtain a hydrophobic eutectic solvent / siloxane modified epoxy resin coating membrane casting solution, and carrying out vacuum degassing treatment; and coating a protected substrate with the casting film solution while the casting film solution is hot, curing, taking out and cooling to obtain the coating. The method of modifying epoxy resin by means of a hydrophobic siloxane chain segment and introducing a hydrophobic deep-eutectic solvent is adopted, so that the oriented regulation and control of the hydrophobic effect of the host and guest components of the coating are realized, and the underwater stability of the coating is improved.

The utility model relates to a lower isolation fully-sealed circuit breaker switch, which comprises a mechanism frame, a circuit breaker assembly and an isolation switch assembly, and the circuit breaker assembly comprises three epoxy resin casting bodies, three vacuum arc extinguish chambers, three fixing seats, a main shaft and three groups of cam assemblies. The isolation switch assembly comprises an isolation shaft, three support sheets, three isolation knives which are respectively and rotatably arranged on the three support sheets and are in linkage cooperation with the isolation shaft, and three static contacts which are respectively arranged on the three epoxy resin casting bodies and are electrically connected with the three vacuum arc-extinguishing chambers. The lower cross beam is respectively provided with isolation convex rings which are arranged among the three supporting sheets in a separated mode, and the epoxy resin pouring body is respectively provided with three insulation cover bodies which cover one sides of the three static contacts. The utility model has the advantages of simple structure, compact structure, high expansibility, stable and reliable performance, good insulation performance and high assembly efficiency.

The utility model relates to the technical field of epoxy resin casting body preparation, and discloses an epoxy resin casting body flat plate preparation device which comprises a preparation cylinder, a plurality of fixing blocks are fixedly installed on the inner wall of the preparation cylinder respectively, and first transparent glass and second transparent glass are placed in the preparation cylinder respectively. A thread groove is formed in the outer side wall of the preparation cylinder, an internal thread lantern ring is installed in the thread groove in a threaded mode, and a balance weight mechanism used for second transparent glass is arranged on the top side of the internal thread lantern ring. The first transparent glass, the epoxy resin flat plate and the second transparent glass are ejected out of the preparation cylinder by lifting the circular ring and moving the top ends of the two demolding columns on the multiple side plates upwards to abut against the bottom side of the first transparent glass, then demolding of the epoxy resin flat plate after casting forming is achieved, and operation is easy, convenient and rapid.

The utility model relates to a short-time gel thermosetting resin casting device which comprises a reaction kettle, a control valve, a telescopic flow guide pipe and a casting mechanism, a servo motor is arranged in the center of the top of the reaction kettle, a reaction pot is arranged in the reaction kettle, and a cavity between the inner wall of the reaction kettle and the reaction pot is a reaction furnace; a feeding hole is formed in the left side of the top center of the reaction kettle. The device is reasonable in structural arrangement and convenient to use, needed resin is prepared through the reaction kettle, the resin flows to the casting mechanism through the control valve and the telescopic flow guide pipe, then the resin flows to the mold at a constant speed through the speed control valve, stable casting is achieved, and the problems that an existing device cannot control the temperature and gelation of the resin in the process from preparation to casting, and the production cost is low are solved. Pollution is eliminated from the source, the heat and humidity resistance of the product is remarkably improved, and meanwhile the technical problems of operation risks, poor process repeatability, large product performance fluctuation and the like existing in traditional manual casting are solved.

The utility model discloses a resin casting stabilizing device and a coating casting head, and relates to the technical field of film manufacturing, the resin casting stabilizing device comprises: a cross beam support having a first end and a second end opposite to each other along the lengthwise extension direction; the ventilation pipe is arranged on the cross beam support, the ventilation pipe comprises a ventilation main pipe, a first ventilation branch pipe and a second ventilation branch pipe, the first ventilation branch pipe and the second ventilation branch pipe are communicated with the ventilation main pipe and are bendable hoses, and the first ventilation branch pipe and the second ventilation branch pipe are arranged close to the first end and the second end respectively; the air blowing pipe is provided with a head end and a tail end which are opposite in the lengthwise extending direction of the air blowing pipe, the head end and the tail end are both closed ends, the positions, close to the head end and the tail end, of the air blowing pipe are provided with a first connector and a second connector respectively, the first connector is communicated with the free end of the first ventilation branch pipe, and the second connector is communicated with the free end of the second ventilation branch pipe. And an air outlet is formed in the air blowing pipe. The purpose of stabilizing resin casting can be achieved by controlling the blowing angle of gas at the lip.

The invention discloses a socket mold and a manufacturing method of a socket, and aims to solve the problem that a finished product is not provided with a proper feeding hole, the upper conical surface of the product can be firstly designed into a cylinder, a necessary sprue size is reserved, meanwhile, exhaust is facilitated, and the product is secondarily processed into a conical surface after being molded by casting. According to the injection system, the mold structure is simplified, operation is easy and convenient, and production efficiency is improved. In addition, a reasonable sealing structure is designed for solving the problems that in the epoxy resin pouring process, glue leakage possibly occurs, and mold stripping is difficult due to the fact that flashes are too thick. By means of the mold structure, the problem that a glue injection opening of a product is difficult to design is solved, the mold structure is simplified, operation is easier and more convenient, and the production efficiency is greatly improved.

This invention discloses a multi-stage sealed storage device for rock core storage and its usage method, applied in the field of rock core storage container technology. The invention features a hot melt adhesive injection pipe connected to an insert plate groove via a second injection hole, and an inert gas injection pipe connected to the interior of the upper and lower sealing caps via a first injection hole. Hot melt adhesive is then injected into the hot melt adhesive injection pipe, and after solidification, it completely seals the upper and lower sealing caps. When the rock core needs to be removed, the hot melt adhesive is simply heated, avoiding direct damage to the stored rock core. Furthermore, by injecting inert gas into the inert gas injection pipe, the interior of the upper and lower sealing caps is made to resemble the high-pressure environment of the Earth's core, allowing for longer storage of the rock core while preserving its internal structure. This allows for effective preservation of the rock core without the need for resin casting.

The invention belongs to the technical field of high polymer materials, and relates to a flame-retardant epoxy resin casting material and a preparation method thereof. The invention provides a preparation method of a flame-retardant epoxy resin casting material, which comprises the following steps: dissolving dimethyl polysiloxane in a lipophilic solvent, then dropwise adding onto aluminum oxide powder while stirring, and heating in a nitrogen atmosphere to obtain PDMS (Polydimethylsiloxane) modified aluminum oxide; mixing epoxy resin and silica powder in vacuum to obtain a resin mixture; mixing silane coupling agent modified DOPO, the PDMS modified aluminum oxide and an anhydride curing agent in vacuum to prepare a curing agent mixture; and performing vacuum mixing on the resin mixture and the curing agent mixture to obtain the castable. The PDMS modified aluminum oxide and the silane coupling agent modified DOPO are adopted, so that the electrical performance and the mechanical performance of the flame-retardant epoxy resin casting material are synergistically improved.

The utility model relates to a three-proofing electromagnetic coil. Comprising a supporting bottom plate, an E-shaped iron core assembly is fixedly installed in the middle of the supporting bottom plate, the back of the iron core assembly is fixedly connected with the supporting bottom plate, and a framework and a winding are installed on the iron core assembly. The framework and the winding are positioned in an epoxy resin casting ladle which is integrally cast and molded, and the epoxy resin casting ladle and the iron core assembly are combined into a whole; the framework and the winding comprise a framework sleeve, a framework top plate is mounted at the top of the framework sleeve, a framework bottom plate is mounted at the bottom of the framework sleeve, the winding is wound on the framework sleeve, and the framework sleeve sleeves a middle body of the iron core assembly; and the cable is connected with the framework and the winding. The three-proofing electromagnetic coil provided by the utility model is strong in structural integrity and has good moisture-proof, mildew-proof and salt mist-proof capabilities, the service life is prolonged, and the failure rate is reduced.