263 results about "Resin casting" patented technology

The invention provides a chemical regeneration method in the casting waste sand disposing process, relating to a process for performing surface chemical processing on various impurities which are attached on the surface of waste sand and are better not be reused in casting-form sand materials. During the chemical regeneration, chemical surface conditioning liquid I or/and chemical surface conditioning liquid II is or are used, and the disposing sand temperature is not more than 400 DEG C. The chemical regeneration method in the invention is carried out before or after the hot-method regeneration disposing or mechanical regeneration disposing of the casting waste sand disposing processing, and the chemical disposing technique is combined with the traditional hot-method regeneration and mechanical friction regeneration. The regeneration new sand formed in the method has better quality of the new sand, can better meet the application requirement on multi-form sand producing technique (hot core box, warm core box and cold core box) for recycling different casting waste sands (hot core box resin casting waste sand, warm core box resin casting waste sand, gas or/and organic fat hardening cold core box resin casting waste sand and profile damp die casting sand), and has better economical efficiency.

The invention provides a vacuum assistant resin casted protection coating, system and method of a permanent magnet motor rotor. The provided protection coating comprises an enhancing phase, demoulding cloth, and a flow guide net, wherein the enhancing phase, the demoulding cloth and the flow guide net are paved on the surfaces of the magnetic poles of a rotor in sequence. The end part of a resin injection pipeline and the end part of an air suction pipe are fixed on the exterior of the flow guide net. The rotor is hermetically connected to a vacuum isolation membrane, and the vacuum isolation membrane covers the enhancing phase, the demoulding cloth, the flow guide net, the end part of the resin injection pipeline, and the end part of the air suction pipe. Vacuum assistant resin casting and moulding equipment is applied to the magnetic pole protection of permanent magnet motor rotor so as to form a resin coating on the magnetic pole surfaces of a permanent magnet motor rotor; moreover the thickness of the resin coating is easily controlled, and mould sleeve tools are not required. The provided system and method can achieve a good casting effect, and thus the mechanical performance and anticorrosion grade of rotor magnetic poles can be enhanced.

The invention belongs to the technical field of material processing engineering, and in particular relates to a resin casting mould rapid manufacturing method. The resin casting mould rapid manufacturing method is characterized by comprising the following steps of: (1) drawing a three-dimensional CAD (Computer-Aided Design) model of a mould according to a casting process drawing of a casting, and preparing a resin prototype for manufacturing a resin casting mould by a rapid prototyping device; (2) rapidly obtaining a die cavity for manufacturing the resin casting mould through a rolling over of a room temperature vulcanized silicone rubber mould by utilizing the prepared resin prototype; (3) manufacturing the resin mould through a manual paste mode by utilizing the die cavity for manufacturing the resin casting mould; and (4) assembling the resin mould prepared by manual paste on a mouldboard to complete the manufacturing process of the mould. Compared with the prior art, the invention has the advantages of facilitating design and modification to the appearance of the casting, being capable of rapidly obtaining the die cavity for manufacturing the resin casting mould, manufacturing the mould with a few tenths of millimeter of dimensional accuracy and shortening the manufacturing cycle of the mould.

Replicas are molded by curing a photo-curable liquid silicone rubber composition to form a transparent mother mold having a cavity corresponding to the outer contour of a master model, casting a photo-curable liquid resin into the mold cavity, and irradiating light to the liquid resin through the mold wall. Replicas can be fabricated by simple steps and within a short time.

The invention provides a preparation process of a vacuum epoxy resin casting type mutual inductor. The preparation process comprises the following steps of (1) winding a primary winding and a secondary winding on a mutual inductor iron core; (2) fully drying a mutual inductor iron core winding and a part die; (3) mounting the dried mutual inductor part in a die, and after moving the die into a vacuum can, vacuumizing the die; (4) preheating an injection molding material, and casting the injection molding material into the die; (5) stopping and vibrating the vacuum can; (6) changing the vacuum state into a normal-pressure state; (7) taking the die out, and after performing a post curing process, opening the die. The preparation process has the beneficial effects that due to the fact that the injection molding material is preheated in advance, bubbles are prevented from being generated during product injection molding, and local discharging amount of a product is increased; due to the fact that the injection molding material in the vacuum can is vibrated by an electromagnetic vibrator, the infiltration filling property and the compaction degree of the injection molding material are greatly improved, and the electric appliance insulating property and the mechanical strength of the mutual inductor are greatly improved.

The invention provides a three-dimensional hollow-resin-poured luminous character structure and a manufacturing method thereof. The three-dimensional hollow-resin-poured luminous character structure comprises a shell, a luminous light source and a resin pouring layer, the shell is of an open structure formed by surrounding of an undersurface and side faces, the middle portion of the resin pouring layer is hollow, and the periphery of the resin pouring layer is fixedly connected with the periphery of an opening of the open structure in a sealed manner. A reverse-side pouring method is adopted, resin is directly poured on a horizontal glass tabletop, and after the resin is coagulated, the horizontal glass tabletop is fixedly connected with a luminous character shell, so that light can uniformly transmit, a luminous character is high in brightness and uniform in light emitting, the manufacturing method is simple, and the luminous character structure is simplified.

The invention relates to a method for manufacturing a resin casting die used for modeling sodium silicate self-hardening sand. The method is characterized by comprising the following steps of: (1) preparing a resin prototype by rapid modeling equipment according to a three-dimensional CAD (Computer-Aided Design) model; (2) rapidly obtaining a die cavity for manufacturing a resin casting die by utilizing the made resin prototype through the rollover of a room-temperature silicified rubber die; (3) manufacturing the resin casting die by utilizing the die cavity through a manual pasting mode; and (4) making the inner cavity of the resin casting die into a hollow structure mode, leaving an air inlet at the bottom of the resin casting die and alternately drilling a plurality of air outlets along the surface of the resin casting die. The invention has the advantages of (1) being convenient to design and modify the casting appearance; (2) improving the size accuracy of the die and the surface smoothness of the die and shortening the processing cycle of the die; (3) rapidly hardening the sodium silicate self-hardening sand on the die surface to facilitate a subsequent die-drawing process; and (4) improving the surface quality of the casting and lightening the labor intensity of workers.

The invention relates to a 1-1 type piezoelectric ceramic fibrous composite material. The composite material is formed by cutting an alternative lamination of a piezoelectric ceramic sheet and a high molecular material polymer. The invention also provides a method for preparing the 1-1 type piezoelectric ceramic fibrous composite material, comprising the following steps: sintering by using a ceramic powder tape-casting method to obtain piezoelectric ceramic sheets; vertically arranging a certain amount of the piezoelectric ceramic sheets in parallel, and inserting PE (Polyethylene) thin film between every two piezoelectric ceramic sheets to form a piezoelectric ceramic stack; injecting epoxy resin casting liquid to a gap of the piezoelectric ceramic stack, finally, pressurizing, raising the temperature and demoulding to obtain 2-2 type piezoelectric ceramic composite lamination, and cropping and preparing the 1-1 type piezoelectric ceramic fibrous composite material with required size. The 1-1 type piezoelectric ceramic fibrous composite material obtained by using the method can be used as a driver applied to the fields such as structure control, vibration abatement, structure health monitoring and the like after being polarized by an interdigital electrode and has a wide application prospect.

A resin casting mold used for manufacturing a casting product including a cured resin produced by curing a fluid resin filling a cavity includes: a block providing the bottom surface of the cavity; and a driver mechanism for applying a force to the block to move the block in a direction that lies along the bottom surface. The driver mechanism moves the block when the cured resin has been formed to separate the cured resin from the bottom surface. This arrangement allows a thinner casting product with a larger major surface to be properly separated from the cavity surface without damaging the casting product and with high driving efficiencies and without equipment including a resin casting mold with a complicated structure or a large size.

The invention relates to an epoxy resin casting insulating material. The epoxy resin casting insulating material comprises the following raw materials in parts by mass: 7-13 parts of epoxy resin, 5-11parts of a curing agent, 20-30 parts of modified silicon dioxide powder and 2-8 parts of mica powder. The epoxy resin casting insulating material has an excellent formation processing property, is suitable for an APG technology and a vacuum casting technology, and suitable for manual casting moulding. An insulating component prepared by the material has a good insulating property and excellent arc resistance, and is capable of solving a technical problem that the arc resistance of an epoxy casting material is poor, wherein the arc resistance of the material can reach more than 210 s. The material has a lower curing shrinkage rate which is 0.1%-0.05% only. An overlarge stress is prevented from being generated between a metal insert and an insulator through the smaller curing shrinkage rate, and a problem that a product is cracked in a place of the metal insert is prevented from happening. The insulating component formed and prepared by using the insulating material has higher strengthand toughness, and is good in secondary machining property.

The invention discloses a phenolic resin casting plate preparation method, and belongs to the technical field of material molding. The method comprises the following three steps: a vacuum pumping step, a phenolic resin solidification step, and a demoulding step. The preparation method can prepare a smooth, bubble-free, easily-molded phenolic resin casting.

The present invention is production process of silicon rubber mutual inductor with the advantages of both epoxy resin and silicon rubber. The production process includes two steps, one vacuum epoxy resin casting step to form epoxy resin layer on the windings of mutual inductor and one silicon rubber casting step to form silicon rubber layer in all the non-winding parts of the mutual inductor. The silicon rubber casting includes pre-treatment of the mutual inductor and casting inside a vacuum casting apparatus.

The invention relates to an impact-resistant epoxy vinyl ester resin and its preparation method and use. The impact-resistant epoxy vinyl ester resin comprises, by mass, A, 40-50% of epoxy resin, B, 5-25% of unsaturated monocarboxylic acid, C, 0.03-0.1% of a polymerization inhibitor, D, 0.2-0.5% of a catalyst and E, 30-40% of a crosslinking monomer. The epoxy resin is one of bisphenol F epoxy resin, hydrogenated bisphenol A epoxy resin, and dimer acid-modified epoxy resin. The preparation method utilizes a ring-opening esterification reaction of the flexible epoxy resin and organic unsaturated monocarboxylic acid, utilizes an appropriate raw material ratio, greatly improves resin toughness, realizes resin casting impact strength of 20-30KJ/m<2>, utilizes less types of the raw materials, has simple synthesis processes, is environmentally friendly, and does not produce three wastes. The impact-resistant epoxy vinyl ester resin has good stability.

The invention discloses a noise-reducing demagnetizing electric reactor which comprises an iron core post body and a coil, wherein the iron core post body is arranged in an insulating tube, the coil is wound around the iron core post body, the iron core post body is wrapped by a noise-reducing layer, the noise-reducing layer is wrapped by a tensile layer, and a shielding layer made of permeability magnetic materials is attached to the inner wall of the insulating tube. According to the noise-reducing demagnetizing electric reactor disclosed by the invention, through arranging a resin casting layer on the outside of the iron core post body, the noise and vibration generated by the electric reactor are greatly reduced; because the resin casting layer is wrapped by a tensile layer, a situation that the resin casting layer is cracked due to thermal expansion can be prevented; and because the shielding layer made of permeability magnetic materials is attached to the inner wall of the insulating tube, the electric reactor has a good shielding effect, good iron core saturation resistance and a low magnetic conductivity, thereby ensuring the quality of the electric reactor.

The invention discloses an epoxy casting mold with the adjustable casting height and an easy-to-disengage inner mold body. The epoxy casting mold comprises a bottom plate, the inner mold body, an outer mold body, an upper end cover and a pressing part. The inner mold body and the outer mold body are installed on the bottom plate, the upper end cover is located between the inner mold body and the outer mold body, and the pressing part is located above the outer mold body. The tops of long threaded rods installed on the bottom plate are inserted into first through holes of the pressing part, and upper nuts and lower nuts for clamping the pressing part are screwed to the long threaded rods. The tops of short threaded rods screwed to the upper end cover are inserted into second through holes of the pressing part, and upper nuts and lower nuts for clamping the pressing part are screwed to the short threaded rods. Lifting of the long threaded rods for the pressing part and the short threaded rods are matched to adjust the height of the upper end cover, the position of the upper end cover is adjusted at will within a certain range accordingly, and then the epoxy resin casting height of various transformers is met. The inner mold body is formed by coiling a board in a barrel shape, and a certain gap is formed between the two ends of the board. After casting is completed, a worker can conveniently dismount the short threaded rods so as to remove attachments on the short threaded rods, and the inner mold body and a finished product can be conveniently disengaged.

The invention relates to a thermosetting shape-memory resin capable of memorizing multiple shapes, and a preparation method thereof. The method comprises the following steps: bismaleimide and polyether amine are mixed and dissolved in tetrahydrofuran; a reaction is allowed for 24h under a temperature of 65 DEG C; when the solution has an amber color, bisphenol A type cyanate is added; the mixture is fully and uniformly mixed; and resin casting body or shape-memory composite material preparation is carried out according to required process parameters. Polyether amine can be subjected to a reaction with bismaleimide resin monomer, such that a linear molecular framework can be formed, and can be adopted as a resin deformation and recovery reversible phase. Resin shape memory effect can be realized, and resin mechanical performance can be improved. With the existences of various cross-linked structures, the resin has a relatively wide glass transition temperature range, such that the function of resin system of memorizing different shapes under different temperatures can be realized. Also, high mechanical performance and temperature resistance level can be maintained.

The invention discloses a total solid insulating ring network cabinet comprising a cabinet body, wherein a solid-sealed polar pole is arranged in the cabinet body; the solid-sealed polar pole comprises an epoxy resin casting block, a vacuum arc extinguish chamber and a vacuum isolation switch; the vacuum arc extinguish chamber and the vacuum isolation switch are arranged in the epoxy resin casting block; the static contact of the vacuum arc extinguish chamber is connected with a first line inlet and outlet casing pipe which is positioned at the side of the epoxy resin casting block; the dynamic contact of the vacuum arc extinguish chamber is linked with a first pull rod; the static end of the vacuum isolation switch is connected with a second line inlet and outlet casing pipe; the second line inlet and outlet casing pipe is positioned at the side of the epoxy resin casting block; the dynamic end of the vacuum isolation switch is linked with a second pull rod; the dynamic end of the vacuum isolation switch is connected with the dynamic contact of the vacuum arc extinguish chamber through soft connection; the upper ends of the first pull rod and the second pull rod extend out of the epoxy resin casting block; and the first pull rod and the second pull rod are connected with an operation mechanism. The total solid ring network cabinet can be used for enhancing the insulating capability and effectively eliminating potential safety hazard, and has a higher protection level.