22results about How to "Prevent the occurrence" patented technology

The invention discloses a low-cost ammonia-free waterproof emulsion as well as a preparation method and an application method thereof, and belongs to the technical field of cement coatings. Comprising the following steps: mixing and stirring an emulsifier, a monomer and deionized water to obtain a pre-emulsion; adding deionized water into the reaction kettle to obtain a kettle bottom material; adding 0.9% of the pre-emulsion and an initiator a into the kettle bottom material in a stirring state, dropwise adding the rest of the pre-emulsion and the initiator b at the same time after 15 minutes, controlling the pre-emulsion and the initiator b to be dropwise added at the same time, and keeping the temperature after dropwise adding is finished; adding an oxidizing agent and a reducing agent to eliminate residual monomers, then adding a neutralizing agent to adjust the pH value, and adding an auxiliary agent; wherein the emulsifier comprises an anionic emulsifier and a nonionic emulsifier in a mass ratio of (2-3): 1; the monomers comprise styrene, butyl acrylate and functional monomers, and the functional monomers are hydroxyethyl acrylate and beta-acryloyloxypropionic acid. The low-cost ammonia-free polymer cement waterproof coating prepared from the emulsion disclosed by the invention has the advantages of low cost, environmental friendliness, good constructability and excellent mechanical properties.

The utility model discloses a dust-free discharging device of a double-cone rotary vacuum reactor, which comprises a dust hood, the dust hood is arranged at the top end of a rigid communicating pipe, the rigid communicating pipe is arranged along the vertical direction, the bottom end of the rigid communicating pipe is connected with the top end of a flexible communicating pipe, and the bottom end of the flexible communicating pipe is fixedly arranged on a sealing cover at the top of a collecting hopper. The bottom of the collecting hopper is connected with the input end of the conveying spiral cylinder, and a material waiting bin is installed below the output end of the conveying spiral cylinder. The side part of the rigid communicating pipe is connected with a lifting assembly; the lifting assembly can be used for buckling the dust removal cover on the outlet end of a discharge valve at the bottom of the double-cone reactor; a conical hole is formed in the dust removal cover, an annular clamping cavity is formed in the periphery of the conical hole, the annular clamping cavity and the conical hole are communicated through a plurality of evenly-distributed air suction holes, and a negative pressure connector communicated with the annular clamping cavity is installed on the side portion of the annular clamping cavity. The discharging device provided by the utility model ensures that no dust and raised dust are generated during discharging, and meanwhile, material loss and contamination are reduced.

The application provides an aluminum pad structure and a manufacturing method thereof. The manufacturing method of the aluminum pad structure comprises the following steps: sequentially forming a first aluminum layer, a protective layer and a passivation layer on a substrate; performing dry etching on the passivation layer by using a plasma containing fluoride ions to form a passivation layer opening, wherein the passivation layer opening is located above a preset region of the first aluminum layer and the bottom surface of the passivation layer opening stays on the surface of the protective layer; then forming a second aluminum layer on the protective layer and removing the part of the second aluminum layer which is higher than the passivation layer, thereby obtaining a sandwich-type aluminum pad structure composed of the first aluminum layer, the protective layer and the second aluminum layer. The manufacturing method of the aluminum pad structure can avoid the direct contact of the etching process with the aluminum pad, thereby eliminating the generation of aluminum fluoride compound residues and fluoride ion residues on the surface of the aluminum pad from the root. The aluminum pad structure is in a sandwich type, has less aluminum fluoride compound residues and fluoride ion residues, is beneficial to improve the bonding and yield test results, and reduces fluorine precipitation.

The invention discloses a method for efficiently leaching platinum group metal in a waste automobile catalyst, and belongs to the field of rare and precious metal smelting. The method comprises the following steps: a leaching process: mixing the hulled waste automobile catalyst with a leaching agent, carrying out acid leaching in an acidic solution for a period of time, adding a complexing agent to complex platinum group metals, leaching for a period of time, and filtering to obtain a pregnant solution rich in the platinum group metals and carrier residues; wherein the leaching agent is a cerium-containing compound; a resin adsorption process: adsorbing the pregnant solution through an adsorption column filled with adsorption resin to obtain an adsorbed solution; and an elution process: washing the adsorbed adsorption resin with water and eluting the platinum group metal step by step, and regenerating the eluted adsorption resin for cyclic utilization. The method aims at avoiding generation of toxic and harmful substances (chlorine and NOx) and use of highly toxic cyanide in an existing wet process, environmental pollution and potential safety hazards are fundamentally eliminated, and meanwhile the leaching efficiency of the platinum group metal is remarkably improved.

The utility model provides an insulating framework, a motor stator assembly and a motor, and the insulating framework comprises a first insulating baffle plate and a second insulating baffle plate which are respectively disposed on the end surfaces of two opposite sides of a stator iron core, and a plurality of insulating support plates disposed between the first insulating baffle plate and the second insulating baffle plate. The first insulation baffle is provided with first tooth portion blocking pieces corresponding to the end face positions of all stator teeth of the stator core, the second insulation baffle is provided with second tooth portion blocking pieces corresponding to the end face positions of all the stator teeth of the stator core, and an insulation supporting plate is supported between at least part of the first tooth portion blocking pieces and the second tooth portion blocking pieces. And the non-deformability of the insulating support plate is higher than that of the first insulating baffle plate and the second insulating baffle plate. According to the utility model, the generation of iron core tooth part stress and the reduction of tooth part sheet layer spacing caused by winding of the winding are avoided, the insulation performance between the tooth part sheet layers is ensured, and the magnetic performance after the stator winding is wound on the stator iron core is ensured to be at a better level.

The invention belongs to the technical field of food processing, and particularly relates to a method for preparing a zero-hydrogenation low-sugar solid beverage through spray drying. The method comprises the following steps: firstly, adding modified lecithin and modified Arabic gum into a feed liquid according to a specific proportion, and homogenizing to obtain a mixed feed liquid; then, a pressure spray dryer is used for cyclic agglomeration drying, and separated fine particles are returned to an atomization area to serve as crystal nucleuses and are bonded with wet fog drops to grow into large particles. Through compounding of the modified additive and a cyclic agglomeration technology, the problems that a traditional product is small in particle size, poor in reconstituability and prone to adhering to the wall are effectively solved, and the solid beverage uniform in particle size and good in instant solubility is prepared. The product adopts refined vegetable oil to replace hydrogenated oil, so that zero trans-fatty acid is realized; polydextrose and erythritol are used as main sweet sources, and the total sugar content is less than or equal to 15%. The process is simple and controllable, high in raw material utilization rate, suitable for industrial production and capable of meeting the requirements of healthy sugar-controlled people.

The present application relates to the technical field of film processing, and particularly relates to a temperature control strong attachment flow line for car film production and a composite process thereof. The present application aims to provide a temperature control strong attachment flow line for car film production and a composite process thereof, which integrates electrostatic auxiliary lamination, gradient heat pressing and gradient cooling, effectively eliminates bubbles, reduces internal stress, and realizes high-quality composite between film layers. The temperature control strong attachment flow line for car film production comprises a feeding device for synchronously releasing at least two film substrates to be laminated; a pre-lamination device arranged downstream of the feeding device and used for preliminarily laminating the at least two film substrates; and the pre-lamination device comprises an electrostatic auxiliary lamination unit and a mechanical extrusion lamination unit. The present application achieves the effect of integrating electrostatic auxiliary lamination, gradient heat pressing and gradient cooling, effectively eliminating bubbles, reducing internal stress, and realizing high-quality composite between film layers.

This invention discloses a precision stamping die, a forming process, and the resulting metal part, relating to the field of precision stamping technology for metal parts. The key technical points are: it includes a lower die base, a support base, a force transmission block, and an upper die assembly. The support base is fixed to the lower die base and has a gradually expanding opening slot. Rotating slots are provided on both sides of the bottom of the opening slot. Two rotary forming parts are symmetrically arranged within the opening slot, with their bottom rotating parts rotatably connected to the rotating slots. A first elastic element is located within the support base, allowing the top of the rotary forming parts to open naturally. The force transmission block slides longitudinally on the lower die base, with a metal blank placed on its top and its bottom connected to the lower die base via a second elastic element. The upper die assembly includes a first pressing rod, which, when descending, presses against the blank, driving the force transmission block downwards. The force transmission block drives the two rotary forming parts to rotate in opposite directions, thereby forming the sidewall of the metal blank in a forward direction, effectively avoiding the problems of metal wires and product defects caused by traditional lateral friction forming methods.

This invention discloses a green and harmless treatment process for rare earth calcium slag, belonging to the field of rare earth metal extraction and waste treatment technology. This process aims to solve the problems of heavy environmental pollution, high energy consumption, and poor selectivity in existing technologies. Its core lies in: providing a bifunctional complexing agent containing ion-capturing and ion-affinity ends (e.g.); dissolving it in supercritical carbon dioxide fluid to form an extraction medium; contacting this medium with pretreated rare earth calcium slag at 40-100°C and 10-30 MPa to selectively extract rare earth elements and form rare earth-complexes; finally, separating the rare earth-complexes by depressurization and recycling carbon dioxide and the complexing agent. This process achieves a rare earth recovery rate >92%, product purity >99%, complexing agent and single-cycle utilization rate >98%, and the fluoride leaching concentration in the treated residue is lower than the national standard limit, achieving harmlessness. It has significant advantages such as a green and environmentally friendly process, low energy consumption, high selectivity, and simplified process.

This application relates to a novel six-sided beautification device for the outer transparent paper of cigarette cartons, including a cigarette carton accelerating separation mechanism. This mechanism is connected to the outlet of a cigarette carton outer transparent paper packaging machine to separate the bonded cigarette cartons. A belt conveyor channel is connected to the side of the accelerating separation mechanism away from the packaging machine. A cigarette carton pushing mechanism is located on the side of the belt conveyor channel away from the accelerating separation mechanism. A finishing face beautification mechanism, a large face beautification mechanism, a long side beautification mechanism, and a cigarette carton ejection mechanism are sequentially arranged on the side of the pushing mechanism to convey the cigarette cartons and iron and beautify the transparent paper on each side of the cartons. This application provides further six-sided shaping and beautification of the transparent paper wrapped by the outer transparent paper packaging machine, allowing the packaged transparent paper to shrink and tighten upon heating, resulting in a smoother and brighter appearance. It also ensures that even when the upstream equipment malfunctions and stops, the beautification of the outer transparent paper of the cigarette cartons can still be completed, and the cartons in the beautification channel can still be emptied.

The invention provides an electrolytic bath and a sodium hypochlorite generator, the electrolytic bath comprises a reaction unit, the reaction unit comprises an air cathode and an anode which are in a sheet shape and are arranged at an interval, the air cathode and the anode are sealed through a sealing spacer and form a liquid chamber, an air chamber is formed on one side, far away from the anode, of the air cathode, and the air chamber is communicated with the liquid chamber. The air cathode is used for reducing oxygen into hydroxyl ions; and the sealing spacers are arranged in the electrolytic bath in a criss-cross manner, so that a liquid chamber and a gas chamber which are isolated from each other are formed. The oxygen reduction reaction is adopted to replace the traditional cathode hydrogen evolution reaction, the structure is simple, the sealing spacers in the device are arranged in a criss-cross mode, it is guaranteed that oxygen makes full contact with an air cathode catalyst layer, and the problems of electrolyte disturbance, reaction efficiency reduction and the like caused by mixing of air and saline water are solved.

This invention relates to a method for separating magnesium and lithium in salt lake brine and its application, relating to the field of efficient and clean utilization of salt lake resources and modern salt chemical technology. This separation method constructs a precise selective magnesium precipitation window, allowing magnesium to precipitate deeply in the form of carbonates, while lithium remains largely in solution, thereby achieving the separation and removal of magnesium from high-magnesium brine. The magnesium precipitate obtained through online solid-liquid separation has a consistently low Mg / Li mass ratio below 1.0 × 10⁻⁶. ‑2 Subsequently, the filtrate is efficiently crystallized and recovered from lithium carbonate via co-ion effect or concentrated pyrolysis at higher temperatures (T2 = 85–100 °C) and lower pCO2. This invention achieves a highly efficient closed-loop cycle of NH3 and CO2, and has the advantages of strong universality, high selectivity, low cost, and environmental friendliness.

The invention discloses a multi-layer circuit board via hole non-stub preparation device, and relates to the field of multi-layer circuit board preparation, the multi-layer circuit board via hole non-stub preparation device comprises a multi-layer circuit board and a processing groove used for processing the surface of the multi-layer circuit board, the multi-layer circuit board is provided with a plurality of through holes, and the processing groove is fixedly connected with a moving track. A vertical moving assembly is fixedly connected to the moving end of the moving rail and used for driving the vertical moving assembly to move in the length direction of the processing groove. Local plugging of the through hole is achieved through the plugging assembly, the through hole is divided into a copper-plating-free area and a target copper-plating area through the two silicon rubber cases on the plug, only electroplating liquid is allowed to enter the target copper-plating area through the open hole in the connecting pipe, and generation of redundant copper columns is eradicated fundamentally; meanwhile, the check ring precisely limits the insertion depth of the plug, it is ensured that the copper plating area is precisely positioned, interference of the stub on high-speed signal transmission is effectively avoided, the signal integrity and reliability of the multi-layer circuit board are improved, and the use requirements of high-end electronic equipment are met.

The utility model relates to a kind of anti black line silica gel line extrusion forming device, including equipment main body, the outside of equipment main body is provided with optimization structure, the optimization structure includes feed structure, the top of equipment main body is provided with feed structure, the left side of feed structure is provided with pressure-reducing type head, the outside of pressure-reducing type head is provided with flange, the inside of feed structure is provided with screw cylinder, the inside rotation of screw cylinder is connected with screw rod, the outside of feed structure is provided with feed inlet.The anti black line silica gel line extrusion forming device, by optimizing feed structure, precise control screw rod and screw cylinder gap, optimization flange contact surface machining precision, realize overall cooling and design pressure-reducing type head, solve the defect of traditional device from multiple dimensions, can completely eliminate the generation of black line in platinum silica gel line extrusion process, substantially reduce product failure rate, reduce the waste of rubber in production process, improve resource utilization.

A sealed electrostatic precipitator includes: a precipitator body; a precipitator end plate connected to the end of the precipitator body, having an inwardly recessed cavity within which a precipitator control board is housed; a precipitator cover plate connected to the side of the precipitator end plate, also having an inwardly recessed cavity; a low-voltage DC input point located on the outer side of the precipitator cover plate; a high-voltage power supply located within the cavity of the precipitator cover plate, with a low-voltage DC input terminal and a high-voltage DC output terminal; the low-voltage DC input terminal connecting to the low-voltage DC input point of the precipitator cover plate, and the high-voltage DC output terminal connecting to the power input terminal of the precipitator control board; and a potting compound covering the high-voltage connection section between the high-voltage DC output terminal of the high-voltage power supply and the power input terminal of the precipitator control board, forming an integrally sealed structure without exposed joints. This invention increases the creepage distance on the precipitator surface and improves product safety, preventing the precipitator cover plate from burning out even in harsh environments.

The present application relates to the technical field of high polymer material silicone rubber, and particularly relates to a kind of flame-retardant antistatic high-temperature resistant vulcanized pipe and a preparation method thereof.The present application effectively solves the poor compatibility and performance conflict problem often occurred when realizing high flame-retardant and antistatic function of traditional silicone rubber pipe material by constructing a unique "microscopic island structure".In the preparation process, vinyl MQ silicone resin as a key "interface bridging" component can be preferentially adsorbed on the interface of different polar rubbers and wrapped modified flame retardant to form a "core-shell" micro area, which not only prevents the interference of high-filled flame retardant on the conductive network, but also significantly enhances the interfacial adhesion between methyl silicone rubber and phenyl silicone rubber two phases;At the same time, the assistant crosslinking agent triallyl isocyanurate participates in grafting reaction during vulcanization process, and establishes a stable chemical bond bridge between different rubber phases, which fundamentally avoids the delamination phenomenon of the blending system.

The utility model discloses a multi-step expanding and reaming integrated composite cutter which comprises a handle portion, a reamer section and an expanding cutter section are sequentially arranged at the working end of the handle portion, the longitudinal section of a cutting edge of the expanding cutter section is in a step shape, the diameter of each layer of cutting edge is gradually increased from top to bottom, and the handle portion, the reamer section and the expanding cutter section jointly form an expanding cutter body. An end part cutting edge is arranged at the end part of the working end of the expanding reamer body, and a chip groove is formed in the working end of the outer wall of the expanding reamer body. The problem that long-strip-shaped and large-sheet-shaped metal chippings are generated during metal machining of an inner cavity of an existing part is solved.

This utility model discloses a chip testing device, relating to the field of electronic chip testing technology. The chip testing device includes a first pressing mechanism and a second pressing mechanism. The second pressing mechanism includes a cover assembly, a pipe connector disposed on the cover assembly, and multiple first test pieces. The cover assembly is detachably disposed on a base to open or close the slot of the positioning groove. The first test pieces are used for electrical connection with the chip. The cover assembly has a flow cavity, and multiple first test pieces are spaced apart within the flow cavity to form multiple gas supply channels. One end of the pipe connector is used to connect to a nitrogen gas source, and the other end is connected to the multiple gas supply channels. The technical solution provided by this utility model achieves the effect of eliminating electric arc generation through the interaction of nitrogen input and the first test pieces as testing structures, thereby improving the overall safety of the testing device.

The present application belongs to the technical field of packaging equipment, and particularly relates to a full-automatic mask packaging machine specially used for producing masks, which solves the technical problem of the mask packaging machine that the mask bag is prone to empty bag and poor production quality, and provides a full-automatic mask packaging machine, which comprises a folding device, a bag making device and a bag conveying device, the folding device comprises a folding mechanism, the folding mechanism comprises a folding support, a mask cloth conveying belt and a mask cloth folding assembly with a film loading insert plate, the bag making device is connected with the film loading insert plate, the bag making device comprises a main support, a side sealing mechanism arranged on the main support and used for sealing the side of the bag film to be packaged, and a cutting mechanism used for cutting the bag film to be packaged into a single mask bag, and the bag conveying device is used for providing power for the movement of the bag film to be packaged and the mask bag. The full-automatic mask packaging machine has the advantages of eliminating empty bags and good production quality.

This utility model discloses an automatic hot pressing and cooling device for elastic modules, including a worktable with a hot pressing zone and a cooling zone arranged side by side. The hot pressing zone has a lifting pressure seat for hot pressing elastic grinding blocks. The cooling zone has a cooling system with a cooling chamber and a water-cooled spray mechanism connected to the cooling chamber. The cooling chamber is located within the worktable in the cooling zone and is used for heat conduction cooling of the hot-pressed elastic grinding blocks. The water-cooled spray mechanism is mounted on the lifting pressure seat, with its spray outlets located directly above the cooling zone for spraying water to cool the hot-pressed elastic grinding blocks. Through the synergistic effect of heat conduction cooling and water-cooled spraying, the cooling time of the elastic grinding blocks can be significantly shortened, the cooling quality improved, the hardness consistency of the elastic grinding blocks enhanced, and the product yield guaranteed.

The application discloses a kind of grinding controller and control method thereof, including control unit and electric power detection probe, control unit is connected with grinding machine control system and carries out data communication, grinding machine control system drives abrasive stone to rotate by motor, and abrasive stone is controlled to move to the workpiece to be ground at a certain speed, electric power detection probe detects the electric power value of the motor and is transmitted to control unit, control unit is judged according to the received signal and forms the signal of control abrasive stone approaching speed and grinding process.By setting electric power detection probe, the contact point of abrasive stone and the workpiece to be ground is judged by detecting the electric power value of the motor, whether it will cause product defects is judged, and alarm information is made in time, on the one hand, the workpiece to be ground is approached at a higher speed, and an alarm is given and a retreat is made when the abrasive stone is damaged, the production efficiency is improved.On the other hand, the quality of the workpiece to be ground is guaranteed, and the production of defective products is eliminated.

The invention discloses a bonding type UV viscosity-reducing adhesive tape as well as a preparation method and application thereof in wafer cutting, and the preparation method specifically comprises the following steps: (1) adding a thermal initiator into a photoinitiator monomer and an acrylate monomer, and carrying out free radical copolymerization reaction to obtain a matrix adhesive solution; (2) adding a photoactive monomer and an active tin reagent into the matrix glue solution, and carrying out grafting reaction to obtain a UV peelable glue solution; (3) coating the UV peelable glue solution on the surface of a base material layer to form a UV peelable glue layer; and (4) covering a release film on the surface of the UV peelable adhesive layer to obtain the bonding type UV viscosity-reducing adhesive tape. The bonding type UV viscosity-reducing adhesive tape prepared by the invention has the following characteristics: the initial peel strength is high, and a protected material can be firmly fixed; after UV irradiation, the peeling strength is obviously reduced, and the material is easy to peel off from the surface of the material; and the whole process is simple, and has the remarkable advantages of no pollution, no adhesive residue and the like.