52results about How to "Reduce contamination" patented technology

The invention relates to the field of stamping technology, and in particular to a stamping device for producing and processing aluminum cans, comprising a frame, a plurality of columns installed on the frame, a middle plate fixed on the columns, and a circulating oil supply component and a stamping component installed on the middle plate. The frame comprises a bottom plate, a top plate arranged above the bottom plate, and side frames fixed on both sides of the bottom plate and the top plate. A No. 1 aluminum strip transmission component and a No. 2 aluminum strip transmission component are respectively installed on the bottom plate and the top plate. When the stamping component is in progress, it is used for punching and stretching the aluminum strip on the No. 1 aluminum strip transmission component to form a can body; when the stamping component is in return, it is used for punching and stretching the aluminum strip on the No. 2 aluminum strip transmission component to form a can cover. The invention makes full use of the driving force and stroke change generated by the oil return shrinkage of the stamping equipment as a can cover stamping in another direction, and successively performs the stamping processing of the can body and the can cover, thereby greatly improving the processing efficiency and effectively reducing the processing cost.

The invention is suitable for the technical field of coal, and provides a high alkali metal coal slag adhering method, which comprises the following steps: step 1, analyzing the occurrence form and content of alkali metal: firstly, analyzing the occurrence form and content of alkali metal in coal, including four forms of water-soluble alkali metal, ammonium acetate solubility, diluted hydrochloric acid solubility and insoluble alkali metal, according to the invention, the slag adhering problem of the high alkali metal coal is reduced, the combustion efficiency and environmental protection property of the coal are improved, the combustion and gasification efficiency of the coal is improved, the environmental pollution is reduced, through reasonable coal blending, the utilization efficiency of coal resources is improved, the production cost is reduced, the low alkali coal can be effectively utilized to improve the combustion characteristics of the high alkali coal, and the slag-bonding and contamination problems of a boiler are reduced; meanwhile, safe and economical operation of the boiler is guaranteed, the components of the coal ash can be effectively regulated and controlled, the utilization value of the coal ash is improved, the environmental influence is reduced, cyclic utilization of resources is achieved, and the slag adhering phenomenon of the high alkali metal coal in the combustion and gasification process can be more accurately predicted and controlled, so that effective prevention and solution measures are taken.

The invention discloses a Micro-LED structure for improving pixel stability and a manufacturing method of the Micro-LED structure. The Micro-LED structure comprises a driving substrate and a Micro-LED tube core, wherein the driving substrate comprises an anode reflecting electrode, the Micro-LED tube core is located on the driving substrate, and the bottom of the Micro-LED tube core is connected with the top of the anode reflecting electrode; the Micro-LED tube core comprises a hole type conductive layer, an optimization layer, a light-emitting function layer, an electron type conductive layer, a passivation layer wrapping the side wall of the anode reflection electrode and the side wall of the Micro-LED tube core, and a cathode electrode located on the Micro-LED tube core, which are sequentially arranged from bottom to top; and the micro lens is positioned on the driving substrate and the cathode electrode and wraps the side wall of the passivation layer. According to the Micro-LED chip prepared by the method, the pixelating process is stable, the side wall quality of pixels is good, and the spatial uniformity of the pixels is high.

The invention relates to an ink-jet digital printer which comprises a base, an ink-jet part arranged on the base and a transmission roller rotationally connected to the base in a driven mode, the base is synchronously and slidably connected with oppositely-arranged moving seats in a driven mode, driving parts are arranged on the base and connected with lifting seats respectively, clamping plates are arranged on the sliding seats, and the driving parts are connected with the lifting seats respectively. The driving part comprises a lifting plate, moving blocks, a first connecting rod, a second connecting rod, a limiting block and a pushing rod, the first connecting rod is fixedly connected to one moving block, one end of the second connecting rod is fixedly connected to the other moving block, the second connecting rod is provided with a limiting groove for the limiting block to slide, the pushing rod is fixedly connected to the moving blocks, and the lifting plate is fixedly connected to the lifting plate. One end of the pushing rod is fixedly connected with the lifting seat, the lifting seat is driven to ascend and descend through the driving part, the fabric can be made to be close to or away from the ink jetting part, and then the situation that ink jetting of the fabric is not uniform due to the height difference between the fabric and the ink jetting part is reduced.

The utility model discloses mixing equipment for concrete preparation, and relates to the technical field of mixing equipment. A mixing device for concrete preparation comprises a barrel, a cover plate is mounted on the barrel, a first motor is fixed to the barrel, the output end of the first motor extends into the barrel to be fixedly connected with a first stirring rod, stirring blades are fixed to the first stirring rod and distributed in an array mode, a fixing block is fixed to the lower end of the barrel, a feeding pipe is fixed to the cover plate, and a discharging plate is mounted on one side of the lower end of the barrel. And a lifting mechanism is arranged between the cover plate and the fixed block. The stirring rod I can be conveniently moved out of the barrel body through the lifting mechanism, so that a worker can conveniently clean dead corners on the stirring rod I and the inner wall of the barrel body, the contamination of raw materials is reduced, and the influence on the mixing efficiency and the mixing quality of concrete is reduced.

This utility model relates to the field of glove box punching technology, specifically a glove box punching mold, including a first lower mold base. A limiting screw hole 1 is fixedly provided on the inner side of the top of the first lower mold base, and a first mold groove is fixedly provided on the inner side of the first lower mold base. The limiting screw hole 1, limiting screw hole 2, and limiting screw hole 3 of this utility model facilitate fixing the first lower mold base to the lower end of the second upper mold base. The first mold groove adopts a hollow design, and the second mold groove adopts a curved design in many places, which can not only effectively reduce the contamination of foreign objects, but also increase the aesthetics. After the mold punching is completed, the servo motor inside the fixing frame starts, drives the ball screw to rotate, so that the ball nut moves back and forth, and then drives the positioning frame to move back and forth. The motor starts, drives the blowing fan to rotate, and forms air, which can blow away foreign objects on the surface of the first lower mold base to prevent the glove box from having an indentation during the punching process.

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 present invention relates to a method for purifying a target protein in high yield. More specifically, the present invention relates to a method for purifying a membrane protein in high yield. The purification method according to the present invention optimizes crushing and elution conditions during processes of separation and purification of membrane proteins, and when using same to purify membrane proteins, the membrane proteins can be purified in a higher yield that is not less than 100 times than that when membrane proteins are purified by using a conventional homogenizer or sonic pulverization. In addition, when membrane proteins are purified by using the purification method of the present invention, nuclei, peroxisomes, and lysosomes are removed, thereby reducing DNA contamination and protein damage by proteases. Therefore, the present invention can be usefully used to purify membrane proteins.

The utility model relates to the technical field of attaching and assembling mechanisms, in particular to a CCD sheet double-feeding online attaching and assembling mechanism which comprises a workbench, a dust removal structure and a taking and placing structure, a supporting frame and a conveying structure are arranged on the end face of the workbench, the dust removal structure is connected to the supporting frame, and the dust removal structure comprises an air blowing assembly and an installation box. The mounting box is slidably connected to the supporting frame, the blowing assembly is connected to the mounting box, the taking and placing structure is in driving connection to the supporting frame, and the taking and placing structure has a sucking and placing stroke along the conveying structure and the material placing side of the workbench so as to transfer materials. According to the technical scheme, the quality of products in the production process is improved.

The utility model provides a material transfer device and a prepreg resin film production unit, the device comprises: a support column, the first end of which is vertically mounted on the ground; the rotating shaft is installed at the second end of the supporting column, and the axis of the rotating shaft is perpendicular to the axis of the supporting column; one end of the supporting arm is connected with the rotating shaft; the clamping assembly is installed at the end, away from the rotating shaft, of the supporting arm and used for clamping / loosening materials. When a resin film roll needs to be transferred, a supporting shaft of the resin film roll can be clamped through the clamping assembly, then the clamping assembly is driven by the supporting arm to rotate so that the resin film roll can be moved from one side of the supporting column to the other side of the supporting column, and in the process, the supporting column in the material transferring device is fixed to the ground; the resin film is not easy to move back and forth among a plurality of production workshops or a plurality of working places, so that the resin film is not easy to be contaminated by foreign matters, the situation that the resin film is judged as a defective product due to the fact that the foreign matters fall on the resin film is greatly reduced, and the product yield of overall production is improved.

The straw decay promoting and deep returning mechanical equipment comprises a vehicle head, a traction frame, a deep ploughing assembly and a surface cleaning assembly, the traction frame is connected to the rear end of the vehicle head in a traction mode, the deep ploughing assembly and the surface cleaning assembly are fixedly installed below the traction frame, and an upper fixing frame and a lower fixing frame of the surface cleaning assembly are fixedly connected with a front U-shaped sliding way and a rear U-shaped sliding way respectively. A plurality of fixing plates are transversely fixed in a gap area between the front U-shaped slide way and the rear U-shaped slide way, a net layer is fixed on the fixing plates, a V-shaped shovel plate is fixedly connected to the front end of the front U-shaped slide way, a V-shaped blade part is arranged at the front end of the V-shaped shovel plate, a guide hopper is arranged at the tail end of the rear U-shaped slide way, and an outlet of the guide hopper is located on the side of a deep groove. The deep ploughing assembly and the surface cleaning assembly are installed in parallel and integrally move forwards along with the traction frame, through the design, ploughing and straw cleaning work can be conducted at the same time, the deep ploughing assembly performs ploughing to form a deep ditch, the surface cleaning assembly cleans straw and pushes the straw into the deep ditch, and deep burying treatment of the straw is achieved.

The invention discloses metal product nondestructive testing intelligent equipment which comprises a fixing table, handles are fixedly connected to the two sides of the fixing table respectively, a plurality of universal locking wheels are fixedly installed at the bottom of the fixing table, a first motor is fixedly installed in one side of the fixing table, a rotating rod is fixedly connected to a rotating shaft of the first motor, and a first gear is fixedly connected to the outer surface of the rotating rod. The outer surface of the rotating rod is fixedly connected with a first bevel gear, and one side of the first bevel gear is in engaged connection with a second bevel gear. Through structural transmission, meshing of a first gear, a second gear and a second rack and meshing of a third gear, a fourth gear and a first rack, a clamping assembly, a supporting frame, a connecting block, a moving assembly and the like can be driven to move downwards, a closed structure is formed, the occupied space is reduced, nondestructive testing equipment can be stored and protected, and the practicability is high. The protection performance on nondestructive testing equipment is improved, dust contamination is reduced, and the device is convenient to move and transport.

The utility model relates to the technical field of charging piles, in particular to a noise reduction and heat dissipation charging pile which comprises a charging pile body, a display screen is arranged at the front end of the charging pile body, a blocking frame is rotationally connected to the upper end of the charging pile body, an LED lamp is arranged on the inner side of the blocking frame, and side plates are arranged on the two sides of the blocking frame. Fixing assemblies used for fixing the side plates are arranged on the two sides of the charging pile body, a shielding assembly used for shielding the upper end of the display screen is arranged at the rear end of the charging pile body, the display screen can be shielded through the blocking frame, dust contamination of the display screen is reduced, illumination can be achieved through the LED lamp, and use at night is facilitated.

The utility model discloses a tooth surface cleaning device, belongs to the technical field of tooth cleaning, and aims to solve the problems that a brush head part of a toothbrush in the prior art is in an exposed state, particularly in the carrying process, the brush head part is easily in contact with foreign objects, bacterial contamination is caused, and the cleaning quality is influenced. Comprising a grab handle, a driving mechanism, a sealing cover and a brush head, the grab handle is of a circular-tube-shaped structure and is hollow, the sealing cover is arranged at one end of the grab handle, the driving mechanism is installed at the end, away from the sealing cover, of the grab handle, and the driving mechanism slides into the grab handle along the end of the grab handle; a brush head is installed at the end, facing the sealing cover, of the driving mechanism, a holding part is arranged on the outer wall of the grab handle, and an anti-sliding block is arranged on the holding part in a protruding mode. According to the tooth surface cleaning device, through the arrangement of the slidable brush head, when the tooth surface cleaning device is used outdoors, the brush head does not make contact with foreign objects, bacterial contamination is reduced, the cleanliness of the brush head is improved, meanwhile, the brush head is protected, and tooth cleaning hygiene is higher.

This utility model discloses a smart watch case with a snap-fit ​​structure, including a watch case base. A bottom shell is fixedly installed at the bottom of the watch case base. Fastening bolts are slidably connected to the four sides of the inner side of the bottom shell. Buttons are fixedly installed at the four corners of the watch case base. A transparent screen is fixedly installed in the center of the top of the watch case base. A locking block is snapped at the four corners of the top of the watch case base. A protective film is fixedly connected to the top of the four locking blocks. Through the locking blocks and the protective film, a protective film can be applied to the transparent screen, which can build a practical protective barrier for the transparent screen. It can effectively resist the scratches, bumps and wear that are unavoidable in daily use, prevent the transparent screen from leaving marks due to friction from hard objects such as keys and tabletops, and maintain the original smooth texture of the transparent screen. At the same time, the protective film can isolate the direct corrosion of stains such as sweat, oil, and dust, and reduce the oxidation, discoloration or staining of the transparent screen that is difficult to clean.

The utility model belongs to the field of atomizers, particularly relates to a novel atomizer, and aims to solve the problems that an existing atomizer generally needs to be held by a patient or other people to be used and is inconvenient to use, and when the atomizer is not used, bacteria and foreign matters are easily attached to a mask of the atomizer, and the patient using the atomizer next time is easily injured. The nebulizer comprises a nebulizer body, a connector convenient for a patient to use is arranged on the outer side of the nebulizer body, a mask for the patient to use is arranged on the connector, a cylinder and a sealing ring which are matched with the connector are arranged on one side of the mask, and the cylinder is in threaded connection with the connector. An elastic connecting belt convenient to fix is fixedly arranged on the outer side of the mask, a patient can conveniently use the atomizer body, the atomizer body does not need to be held by hands, a bedridden patient can conveniently use the atomizer, and when the atomizer body is not used, the mask can be shielded and protected, contamination of foreign matter is reduced, and the safety of the patient is guaranteed.

The invention belongs to the technical field of sensor calibration equipment, and particularly relates to a purging device for relieving powder contamination of a vertical pipeline and a calibration system and method. The purging device comprises a plurality of four-way nozzles, a gas distributor and a controller. And each four-way nozzle is arranged on the pipe wall of the vertical pipeline. The gas distribution instrument comprises a gas source, a main control valve, a manifold block, a plurality of branch control valves and a plurality of gas pipes. The main control valve is connected to an outlet of the air source, and an outlet of the main control valve is communicated with an inlet of the manifold block; and each outlet of the manifold block is communicated with each four-way spray head through an independent air pipe branch control valve. The controller is electrically connected with the main control valve and the branch control valves; and in the dustproof mode, airflow sprayed by the four-way nozzles forms an air curtain capable of preventing dust contamination on the inner wall of the vertical pipeline. And in the cleaning mode, all the four-way nozzles are alternately opened according to a preset sequence to complete pipeline cleaning. The problem that the inner wall of the vertical pipeline is easily contaminated with dust in the calibration process of the dust concentration sensor is solved.

The invention relates to the technical field of electric wire and cable processing, in particular to automatic processing equipment for electric wire and cable production and manufacturing and a processing technology. A first material injection guide pipe, a second material injection guide pipe and a third material injection guide pipe are arranged on the two sides of the end, close to the feeding rotating frame, of the extrusion shell correspondingly, a cooling sleeve set is arranged between the extrusion shell and the material receiving rotating frame, and a layered pre-extrusion system is arranged in the extrusion shell. And then cooling the outer layer of the multi-layer wrapping material, softening the inner layer of the multi-layer wrapping material at the same time, then extruding the combination of the multi-layer wrapping material, and finally thoroughly cooling the cable output by the extruded shell through the cooling sleeve group, so as to achieve the effects of pre-extrusion and pre-cooling, and simultaneously cooling the surface of the multi-layer wrapping material, thereby shortening the production cycle of the cable and improving the production efficiency. And the overall production efficiency is greatly improved.

The present invention belongs to the technical field of waste plastic recycling, and in particular, is a waste plastic bottle recycling, cleaning and processing device and method. Aiming at the problem that the traditional waste plastic bottle recycling, cleaning and processing device cannot effectively clean the inner wall of the waste plastic bottle, the following scheme is proposed, including a water storage tank, a bottom column 1 is evenly welded on the upper surface of the bottom end of the water storage tank near one side, and the top of the bottom column 1 is fixed with the same cleaning box by bolts, the circumferential outer wall of the cleaning box is plugged and fixed with a bottle inlet pipe near the top, and a grille is fixed with bolts on the top of the cleaning box, and a power mechanism is installed on the top of the grille. The present invention decomposes the waste plastic bottle into multiple independent individuals by setting a cutting knife 1 and a cutting knife 2, so that it is convenient to clean the inner wall of the plastic bottle, ensure that all parts of the plastic bottle can be cleaned, improve the cleaning effect, and ensure the recycling quality.

Provided are a HEK293T cell strain having high dispersibility and a screening method therefor. Specifically, the present application relates to a method for screening a HEK293T cell strain suitable for serum-free suspension culture, a cell strain screened by using the method, and a method for producing a viral vector by using the cell strain.

The application relates to the field of semiconductor wafer polishing, in particular to an interactive device for polishing silicon wafers, which comprises a fixing base, a carrier mechanism and a polishing head mechanism; a partition mechanism, which comprises a baffle plate, the baffle plate is located in a containing space, and the baffle plate is slidably connected to the fixing base along a first direction; when the polishing head is in a first state, the baffle plate is arranged on the side of the polishing head; when the polishing head is in a second state, the baffle plate is arranged directly below or on the side of the polishing head; and a cleaning mechanism, which is located on the side of the containing space, and the cleaning mechanism has at least a first mode and a second mode; in the first mode, the baffle plate is arranged between the polishing head and the carrier, the cleaning mechanism enters between the polishing head and the baffle plate and cleans the polishing head; and in the second mode, the cleaning mechanism is not in action. The technical problem that the silicon wafers are easily contaminated during the interaction process is solved, and the technical effect of reducing the contamination of the silicon wafers during the interaction is achieved.

The invention relates to the technical field of electroplating product cleaning equipment, in particular to an electroplating cleaning pool which comprises a machine box, a conveying device is installed on the machine box, a cleaning basket for containing electroplating products is connected to the conveying device, and an oil removing assembly, a spraying assembly, a neutralizing assembly and a cleaning assembly are installed on the machine box. A collecting device for collecting residual liquid on the cleaning basket is installed on the machine box, the collecting device comprises a second sliding table, the second sliding table is installed on the machine box, a carrying plate is connected to the second sliding table, a collecting plate is rotatably installed on the carrying plate, a mounting groove is formed in the collecting plate, and the mounting groove is communicated with the second sliding table. A water absorption sponge is installed on the collecting plate, and a water outlet pipe is connected to the collecting plate. The electroplating cleaning pool has the effect of improving the convenience of the electroplating cleaning pool in the operation process.

The utility model provides a displayer with a protective adjusting support, which belongs to the technical field of displayers and comprises a circular base, four supporting legs are mounted on the outer wall of the circular base, an adjusting pipe is fixed on the circular base, a moving rod is slidably connected in the adjusting pipe, a plurality of limiting grooves are formed in the moving rod, and the protective adjusting support is arranged in the limiting grooves. A cross rod is fixedly connected to the upper end of the adjusting pipe, and a locking mechanism for locking different positions of the moving rod is mounted on the adjusting pipe; the display assembly with the protection adjustment function comprises a first connecting rod embedded in the transverse rod. The height of the display can be flexibly adjusted according to the height difference of users, eyestrain and discomfort caused by mismatching of the height of the display and the optimal visual field of the users are avoided, the display can be prevented from being directly stained with dirt through the protective cover, and if the surface of the protective cover is stained with dirt, cleaning is needed. And the semispherical rubber strip is matched with the arc-shaped groove, so that the protective cover is convenient to disassemble and assemble.

The invention discloses a shaping and trimming device, and relates to the technical field of trimming. A shaping and trimming device comprises a plate body, a fixing frame is fixed to the plate body, two symmetrical first electric sliding rails are installed on the fixing frame, a sliding frame is installed on the first electric sliding rails, a rotating motor is fixed to the lower end of the sliding frame, the output end of the rotating motor penetrates through the sliding frame to be fixedly provided with a containing plate, and a plastic plate is placed on the containing plate. An abutting assembly is arranged between the sliding frame and the plastic plate, a driving motor is installed at one end of the fixing frame, a milling cutter is fixed to the output end of the driving motor, the motor is obliquely arranged, the milling cutter makes contact with the edge of the plastic plate, a second electric sliding rail is fixed to the supporting plate, and a limiting assembly is arranged between the cleaning plate and the fixing frame. And through the cleaning mechanism, chippings entering the electric sliding rail are cleaned, the influence on operation of the electric sliding rail is reduced, abrasion of the chippings to the electric sliding rail is reduced, and the situations that the precision of the electric sliding rail is reduced and the electric sliding rail is damaged are reduced.

This application provides a zebra crossing marking device for application, relating to the field of zebra crossing construction. This application involves setting a second hollow hexagonal plate and an internally threaded tube on a hollow cotton rope. After the hollow cotton rope is wound up, the internally threaded tube is connected to a first externally threaded tube to seal the first externally threaded tube, thereby preventing powder from seeping out of the first externally threaded tube, reducing powder waste, lowering construction costs, and protecting other tools from contamination by successfully preventing powder seepage, thus reducing maintenance and replacement costs caused by tool contamination.

The utility model relates to the technical field of building decoration cabinets, and discloses an assembly type building decoration and storage integrated cabinet structure which comprises a cabinet body, a cooking bench is arranged at the top of the cabinet body, a cleaning pool is arranged at the top of the cabinet body, and an antifouling mechanism is arranged at the top of the cabinet body. According to the assembly type building decoration and storage integrated cabinet structure, by arranging the anti-fouling mechanism, when the cabinet body is installed, the surrounding plates are installed on the periphery of the top of the cabinet body, oil stains on the top of the cabinet can be prevented from leaking into wall seams or dripping into a cabinet door of the cabinet body, and by arranging an oleophobic plate and an oleophobic hole, the oil stains on the top of the cabinet can be prevented from leaking into the wall seams or dripping into the cabinet door of the cabinet body; oil stains are injected into the collecting box through the oil drainage holes by using cleaning cloth, the collecting box is taken away and cleaned when garbage is cleaned, the cabinet can be prevented from being directly contaminated by oil stains on the cabinet surface when the cabinet is used by arranging a high antifouling plate, and the antifouling mechanism can be provided with an oil baffle plate, so that the situation that the oil stains contaminate clothes is reduced, and the oil stains are easy to clean.

The utility model belongs to the field of physiotherapy pads, particularly relates to a physiotherapy pad with a far infrared heating function, and aims to solve the problems that although the conventional physiotherapy pad can be heated by a heating layer to generate far infrared rays to promote metabolism and blood circulation of a human body, the human body is perspired after being heated by the physiotherapy pad in the use process, and the physiotherapy pad is inconvenient to use. In order to solve the problems that in the prior art, sweat can be adsorbed on a physical therapy pad, bacteria breeding is easily caused during use, antibiosis cannot be achieved, and body health is damaged, the following scheme is provided: the physical therapy pad comprises a physical therapy pad main body, the physical therapy pad main body is composed of two non-woven fabric layers, two cotton cloth layers and a heating layer, and the rolled physical therapy pad main body can be fixed through a fixing mechanism; the surface of the physical therapy pad body can be protected through the protection mechanism, dust on the surface of the physical therapy pad body is reduced, and meanwhile, the physical therapy pad is antibacterial and beneficial to body health.

The utility model discloses a U-shaped handle-free cabinet door installation piece which comprises a plurality of handle-free door plates, an installation assembly is arranged on one side of each handle-free door plate, an auxiliary assembly is installed on each installation assembly, an anti-skid assembly is installed on one side of each handle-free door plate, and a limiting assembly is installed on each handle-free door plate. The U-shaped handle-free cabinet door has the advantages that the U-shaped handle-free cabinet door is provided with the handle-free door plate, oil stains on the U-shaped handle-free cabinet door mounting part can be conveniently shielded in an auxiliary manner, taken clothes are prevented from being stained by the oil stains on the U-shaped handle-free cabinet door mounting part, meanwhile, the anti-slip component arranged on the handle-free door plate can reduce the condition that dust attached to the U-shaped handle-free position of the U-shaped handle-free cabinet door is slippery, and the U-shaped handle-free cabinet door is convenient and meanwhile, the limiting assembly arranged on the handle-free door plate not only can buffer and limit the U-shaped handle-free cabinet door when the U-shaped handle-free cabinet door is closed, but also can perform auxiliary sealing treatment on the U-shaped handle-free cabinet door.

This utility model discloses a teething toy, relating to the field of maternal and infant product technology. The teething toy includes a baffle, a mouthpiece, a protective cover, a stopper, and a handle. The baffle is petal-shaped, which can catch food juices and saliva flowing from the mouthpiece, preventing liquid from flowing onto the hands to ensure hand hygiene and reduce the cleaning burden on parents. It also forms a natural limit against the outside of the mouth to prevent the mouthpiece from inserting too deeply. The mouthpiece is integrally formed at the narrow end of the baffle and communicates with its interior. The protective cover is detachably connected between the baffle and the mouthpiece and can cover the mouthpiece. The stopper is integrally formed with the handle and can pass through the inside of the baffle and be detachably connected to the mouthpiece.

The invention discloses a synthesis process of an indium phosphide semiconductor material, belonging to the technical field of semiconductor material preparation. High-purity indium and high-purity phosphorus are respectively placed at two ends of a closed quartz tube, the temperature is raised to make phosphorus vapor react with indium metal melt to generate indium phosphide, a phosphated-oxidized indium composite film is formed on the surface of the indium quartz boat, and a quartz partition is arranged between an indium metal area and a red phosphorus area in the quartz tube, so that the diffusion of phosphorus vapor is improved and silicon contamination is also reduced.