1685results about How to "Won't scratch" patented technology

The invention relates to an automatic feeding device with robots. The automatic feeding device is used for carrying workpieces to a specified station. The automatic feeding device comprises a frame table, a PLC system arranged on the frame table and a feeding system arranged on the frame table and connected with the PLC system. The feeding system comprises five parts including a feeding mechanism, a positioning conveying mechanism, a vision mechanism, a vacuum conveying mechanism and an empty-tray discharging mechanism. A tray fully loading the workpieces is conveyed to the positioning conveying mechanism to be fixed and locked through the feeding mechanism, the workpieces in the tray are all carried to the specified station through the vacuum conveying mechanism under the assisting of the vision mechanism, then the tray is conveyed to the empty-tray discharging mechanism through the positioning conveying mechanism, and the tray is conveyed out through the empty-tray discharging mechanism. Compared with the prior art, the automatic feeding device has the advantages of being high in adaptability, wide in universality, high in feeding speed, low in workpiece damaging risk and the like.

The invention discloses a method for fully automatically producing a bed core, which comprises: step 1, coiling steel wires into springs, and outputting the springs at equal intervals; step 2, adjusting the springs to upright conveying, then positioning the springs, arraying the springs into groups, and then automatically pushing the springs to a string spring position; and step 3, stringing the springs into the bed core by string spring steel wires. The invention also discloses a device for fully automatically producing the bed core, which comprises an automatic spring coiling machine, an automatic string spring assembling machine, an automatic feeding machine and a complete machine control device. The automatic spring coiling machine is provided with a step output mechanism. The automatic feeding machine is provided with a turnover mechanism, a transmission mechanism and a positioning push mechanism. The turnover mechanism is connected with the step output mechanism and simultaneously connected with the transmission mechanism. The positioning push mechanism comprises a position sensor, a plurality of positioning plates and a plurality of push plates. The automatic string spring assembling machine is placed on the transmission mechanism of the automatic feeding machine in parallel. The complete machine control device is connected with the position sensor. The method and the device can achieve full automatic production from the steel wires to the bed core, and have high efficiency.

The invention provides a pelleting emery paper which can sharpen self and has durable grinding property and a preparation method and applications thereof. The invention comprises compound grinding grains which are coated to the surface of a substrate through adhesive and show aggregate ball shape. The grinding powders in the compound grinding grains are dispersed in one or more metal oxide sol which is mixed with organic adhesives or inorganic adhesives. The grain diameter of the grinding powder is not more than 10 micron meters and the diameter of the compound grinding grain is 5-50 micron meters. The emery paper is applicable in the grinding and polishing of most work pieces including metal, metal alloy, ceramic, optical element, fiber connecter, hard disc and semiconductor, etc.

The invention relates to a polishing pad and a manufacturing method thereof. A liquid polymer material is directly formed on the surface of a substrate material and is solidified to form an even grinding layer, thereby the polishing pad has better integrative performance and better flatness, otherwise, the grinding layer has a long structure and is provided with a plurality of holes which have better inclusion ability for grinding particles in grinding liquid, moreover, the polishing pad has a higher compression ratio, and the polishing pad is in tight contact with an object to be polished and can not scuff the surface of the object to be polished, therefore, the grinding efficiency and the quality can be improved.

A non-asbestos friction disk for the brake of drilling machine, heavy machinery, etc is prepared from glass fibres, organic fibres, low-smelting-point metal powder and resin-rubber mixture. Its advantages are low hardness, high toughness, high friction coefficient, high mechanical strength, and low abrasion.

The invention discloses an installation structure of a train roof jumper cable of the urban rail. A first high-voltage connector casing, a first high / low voltage connector, a second high / low voltage connector and a first low-voltage connector casing are positioned in the top of a first compartment; a second high-voltage connector casing, a third high / low voltage connector, a fourth high / low voltage connector and a second low-voltage connector casing are positioned in the top of a second compartment; the first high / low voltage connector on the first high-voltage connector casing is connected to the third high / low voltage connector on the second high-voltage connector casing via the jumper cable; and the second high / low voltage connector on the first low-voltage connector casing is connected with the fourth high / low voltage connector on the second low-voltage connector casing via the jumper cable. The installation structure has the advantages that the operation space is large, the installation environment is simple, and the structure is safer and more reliable; the service life is longer; the cable path is shorter, and the cost is reduced greatly; the sealing performance is higher; the whole installation structure can be dismounted rapidly, the occupation space is small, and the structure is beautiful and tidy; and it is not required to reconstruct end wall and channel structures, the workload is low, and the cost is lower.

The invention provides brake tongs with a vehicle brake, and belongs to the technical field of an automobile machine. The invention solves the problems that the prior brake tongs are difficult to be processed and assembled, and the closing ring fixing the spring seat tears the wall of the piston hole to cause leakage. The brake tongs having the vehicle brake comprises a tongs body, a rocking arm, a retaining piece and a piston which can push the retaining piece to brake. A multiple-threaded screw enclosed with a multiple-threaded sleeve is arranged between the rocking arm and the piston. One end face of the multiple-threaded sleeve leans against the piston; and a transmission mechanism is arranged between the other end and the rocking arm. The tongs body is of split structure, and consists of a main tong body and a secondary tong body permanently connected with the main tong body. The multiple-threaded screw is threaded in the main tong body and the secondary tong body. The piston is arranged in the main tong body. The rocking arm is arranged on one side of the secondary tong body. The multiple-threaded screw inside the secondary tong body is enclosed with a return spring with both ends acting on the main tongs body and the multiple-threaded screw, respectively. The brake tongs with the vehicle brake have the characteristics of automatic compensation for the clearance resulting from abrasion of the retaining piece, easy assembling and simple structure.

A digitalized guiding template for orthodontic bracket indirect bonding comprises a substrate; the substrate comprises a side surface body which is attached to a tongue-side or palate-side tooth surface of a patient dentition, and a top surface body which is adapted to a top surface of the patient dentition; guiding slots which can determine that the bracket is at the lip and cheek side of the tooth surface are disposed on the top surface body; the guiding slots correspond to the bracket one by one; each guiding slot corresponds to a hook-shaped guiding rod which can determine the position ofthe bracket on the tooth surface; a straight rod part of the hook-shaped guiding rod is inserted into the guiding slots; a bending part of the hook-shaped guiding rod is detachably connected with thebracket; the hook-shaped guiding rod guides the bracket through the guiding slots and presses the bracket on the predetermined tooth surface of the patient. The invention has the advantages of convenient and simple operation, high accuracy, no dentition extrusion, and convenient treatment of leaked glue during bracket bonding.

The invention discloses a multifunctional adjustable tablet personal computer vehicle-mounted support which comprises a support tray, a fixed seat and a tray connecting part. The support tray comprises a movable support and a fixed support which are relatively arranged, two lug seats are oppositely arranged on the outer side of the movable support and the outer side of the fixed support, the movable support is movably connected with the fixed support through an elastic mechanism, a slide mechanism is arranged at the upper end face of the fixed support, the tray connecting part is connected with the slide mechanism, the slide mechanism is arranged on the fixed support in a slidable mode, and a locking mechanism is further arranged on the fixed support. According to the embodiment of the multifunctional adjustable tablet personal computer vehicle-mounted support, the distance between the movable support and the fixed support can be adjusted when the elastic mechanism is drawn, and accordingly tablet personal computers of different sizes can be contained between the two lug seats which are oppositely arranged to be locked and fixed by a locking part of the movable support. When the slide mechanism does not need to slide, the locking mechanism can lock and fix the slide mechanism, namely the tray connecting part can be fixedly connected with the support tray. Thus, the multifunctional adjustable tablet personal computer vehicle-mounted support is excellent in performance and good in using effect.

A disposable absorption object comprises an absorption body and an outer covering layer. The absorption body is provided with a liquid permeable surface layer, a liquid non-permeable bottom layer and an absorption core. The outer covering layer is two-layer non-woven cloth wrapping an elastic retractable part, is connected on one side, far away from the absorption core, of the bottom layer of the liquid non-permeable bottom layer of the absorption body, and is provided with a front waist area, a back waist area and a crotch area. The front waist area and the back waist area are connected in a sealing mode on opposite transverse side edges so as to form a side edge sealing part. Waist elastic retractable parts are respectively arranged along the front waist area and the back waist area. A hot melt adhesive joint layer does not exist in the two-layer non-woven cloth of the outer covering layer where the side edge sealing part is located. The elastic retractable parts are connected in the two-layer non-woven cloth, except the area where the side edge sealing part is located, of the outer covering layer in a stretched mode. The disposable absorption object has the advantages that the side edge sealing part is soft and is incapable of scratching skin of infants, and the waist area can be attached to waists of the infants more softly. Moreover, the disposable absorption object is comfortable and well-fitting when worn.

The invention discloses a power battery high-applicability nondestructive automatic clamping apparatus which comprises a fixed plate, movable guide posts, a press guide post, a movable plate, a supporting plate, a connecting rod and a clamping jaw guide frame, wherein the upper part of the movable plate is provided with the at least two movable guide posts; the movable guide posts respectively penetrate through holes arranged in the fixed plate, and the upper ends are connected through the connecting rod; the press guide post penetrates through the movable plate, the upper end is connected with the fixed plate, and the lower end is connected with the supporting plate; a press guide post spring is sheathed on the press guide post; the press guide post spring is positioned between the movable plate and the supporting plate; the clamping jaw guide frame is installed on the movable plate; the clamping jaw guide frame is connected with a clamping jaw; and the clamping jaw comprises two sections, and is movably connected to the supporting plate through a shaft position screw. The apparatus can be used for quickly and flexibly clamping the batteries without destructing the batteries, can reshape the batteries, and is suitable for different battery models.

The invention discloses a deburring machine tool which comprises an enclosure, a first working disk and a second working disk, wherein the first working disk and the second working disk are arranged inside the enclosure; the first working disk is arranged below the second working disk; the upper surface of the first working disk is provided with a plurality of workpiece clamping disks; the second working disk is driven to rotate by a driving device; and a plurality of rotatable brushes are also arranged below the second working disk. By the rotation of the brushes, burrs can be effectively removed and the adverse effects on the size, which are generated in the process of deburring by conventional mechanical methods such as a turning method and a milling method are avoided.

The invention discloses an access passage only enabling pigs to be fed separately, which comprises a passage and rails arranged at two sides of the passage, wherein the passage is provided with an entry and an exit; the entry end of the passage is provided with an automatic door which comprises two doors, a door lock and a control system; each door comprises a rotating shaft rod and a plurality of wheel rods with the same length; the free end of each wheel rod is provided with a plastic wheel of a rotating shaft in the vertical direction; the door lock is arranged between the two doors, and comprises two sets of oppositely arranged bayonet lock devices, a splint and a push-off pin; each set of bayonet lock device comprises a right trapezoid block, a support block and the rotating shaft; the control system comprises an eccentric wheel, a DC motor, a metal detector, an infrared sensor and a lever, and controls the automatic opening and closing of the door lock; and the door lock controls the opening and closing of the two doors. The access passage can prevent the pigs from fighting for feeder in the process of raising the pigs in groups on a large scale, and conveniently realize the feeding and management of an individual pig.

The invention discloses a magneto-electric induction type cattle left displaced abomasum repositor. The magneto-electric induction type cattle left displaced abomasum repositor comprises a repositor needle transmitting device and a repositor needle with a thread binding hole, wherein the outer edge of the repositor needle transmitting device is round and smooth and comprises a transmitting tube, a catapulting part and a magneto-electric induction device, the repositor needle is a straight needle, the rear end of the repositor needle is arranged in the catapulting part, the rest of the repositor needle is arranged in the transmitting tube, the catapulting part comprises a hitting head provided with a position clamping shoulder, the repositor needle transmitting device is further provided with a limiting device capable of being clamped to the position clamping shoulder, the magneto-electric device comprises an electromagnet which is arranged in a sliding mode, and the electromagnet is in linkage match with the limiting device. Due to the magneto-electric induction type cattle left displaced abomasum repositor, an operation can be simplified, an opening is only formed in one side, the survival rate of a serious-disease cattle is improved, the repositor needle can be conveyed to a target position conveniently and effectively protected, the accident that the viscera is punctured by the repositor needle is reduced, magneto-electric induction automatic positioning is achieved, an assistant does not need to give assistance from the right side, and one person can complete the cattle left displaced abomasum operation.

The invention discloses a box-type cable reel device which comprises a winding box. A rotatable reel rotation rod is mounted in the vertical middle of the winding box, the upper end of the reel rotation rod extends out of the upper side wall of the winding box and then is connected to a positive and reverse rotation motor through a speed change mechanism, the upper end and the lower end of the reel rotation rod close to the side wall of the winding box are respectively provided with a rotating side plate, and a cable storage area is formed between the two rotating side plates. A winding device of a traditional cable reel device is improved, the reel rotation rod can be driven to slowly rotate in an inner cavity under the action of the speed change mechanism comprising a gear motor and an anti-slip conveying belt after the positive and reverse rotation motor is started in practical use, reeled cables are winded in the area by the vertically arranged rotating side plates, and the box-type cable reel device is simple in structure, convenient to reel and electric in operation, and time and labor are saved.

The invention discloses an end effector for a fruit picking robot, and relates to the technical field of mechanical automation. The end effector comprises a sleeve unit and an airbag unit, wherein the sleeve unit has a tubular structure with open front and back ends; and the airbag unit is arranged in the sleeve unit, and fruits are picked by using the inflating and deflating process of the airbag unit. The end effector for the fruit picking robot mainly comprises the sleeve unit and the airbag unit, is simple in structure and low in cost, cannot scratch the fruits or be scratched by fruit trees in the using process, can safely and reliably pick the fruits and has a wide application prospect.

The invention discloses a special washing machine for low-noise and high-strength roller bearings. The special washing machine comprises a framework, a conveying mechanism, a spray-wash system and an electric control system. The spray-wash system comprises a liquid storage tank, a ball nozzle and a liquid delivery pipe, the liquid storage tank is arranged below a machine body, the ball nozzle is arranged above a conical apex, the liquid delivery pipe is connected with the liquid storage tank and the ball nozzle, a washing pump is arranged at the liquid delivery pipe, a conical compression cover is further arranged at the ball nozzle, the conveying mechanism comprises a worktable cylinder, the worktable cylinder is horizontally arranged on the framework, the tail end of a piston rod of the worktable cylinder is fixedly connected with a worktable, and the worktable can horizontally move under the control of the worktable cylinder. The special washing machine has the advantages that the ball nozzle can be directly aligned with the insides of the bearings, so that the bearings can be washed while rotating, grooves in collars can be washed, dirt between rollers and retainers also can be thoroughly washed, the cleanliness of the bearings can be improved, and requirements of the bearings on low noise and vibration can be met.

The invention discloses an automatic precision grinding device for the outer surfaces of shaft type workpieces and relates to the technical field of magnetic grinding. The device comprises a baseplate, a heel block, a driving wheel, a driven wheel, a transmission belt, a main shaft end cover, a first transmission box, a positioning seat, a flange plate, a three-jaws self-centering chuck, a grinding device, a connecting block, a grinding support base, a workpiece positioning base, a tailstock, a second motor, a coupling, a screw positioning seat, a screw, a supporting plate, a nut, a sensor positioning seat, a limit sensor, a slide way, the nut and a sliding block. A punched hole is formed in the top and / or the side of the grinding support base, a cylindrical cam is arranged on a connecting rod, the cylindrical cam is provided with a rotating rod, the grinding support base is provided with an arc block, a rotary knob is installed on the arc block, and the rotating rod is sleeved with the rotary knob. The automatic precision grinding device for the outer surface of shaft type workpieces has the beneficial effects that the device is simple in operation, low in cost, capable of adapting to shaft type workpieces of different specifications , capable of improving the machining efficiency and capable of improving the precision and quality of the outer surface of the shaft workpieces.

The invention relates to the field of airplane metal envelope manufacturing, in particular to a stretch forming die with a composite structure and a manufacturing method of the stretch forming die. The stretch forming die comprises an upper die assembly and a lower die assembly, the upper die assembly is connected with the lower die assembly through a guiding positioning device assembly, the upper die assembly is located above the lower die assembly, a hole making device assembly of an envelope part positioning hole is arranged on the upper surface of the lower die assembly, and at least two earring-shaped hooks are arranged on the side face of the lower die assembly. The stretch forming die is provided with a lower die and an upper die , and the upper die and the lower die have the composite structural characteristic, a base body of the stretch forming die adopts a cast aluminum material and is provided with lightening grooves and reinforced ribs so that the total weight of the stretch forming die can be lightened obviously. Dovetail grooves which are distributed in a latticed mode on the molded surface of the cast aluminum base body can firmly hold machinable resin, and effectively prevent a machinable resin layer from cracking and falling down, and the service life of the stretch forming die is prolonged.

The invention provides a drilling fixture for a plastic pipe. The drilling fixture comprises a base and a clamping mechanism which are in sliding connection with each other through cooperation of guide rails and sliding blocks, wherein a straight-line motion mechanism is arranged between the base and the clamping mechanism, and comprises a lead screw nut pair of which the axis is parallel to the sliding direction of the sliding blocks; the top of a nut on the lead screw nut pair is fixedly connected with the bottom of the clamping mechanism; a support is fixed on the base; a drilling die is arranged on the support; a first through hole capable of accommodating the drilling die is formed in the support; the clamping mechanism comprises a baseplate and brackets; a V-shaped groove is formed in the cross section of each bracket; and a flexible steel belt is connected with the two sides of each bracket through locking bolts. The drilling fixture provided by the invention has the advantages that through the regulation of pipe diameters and drilling positions, relatively-high-precision drilling on plastic pipes of different specifications on a common drilling machine can be achieved; the structure is simple; and the operation is easy.

The invention discloses a container comprising a chassis, a front-end wall, two side plates, a top plate and a door, wherein the chassis is used for bearing goods, the front-end wall is positioned on the front end of the chassis, two side plates are positioned on two sides of the chassis, and the top plate is positioned on the top of the chassis, and the door is positioned on the rear end of the chassis; the chassis comprises two side beams positioned on two sides thereof, a plurality of beams fixedly connected between two side beams and a wood floor laid on the upper surface of the chassis; the upper surface of the chassis is horizontally provided with at least one V-shaped or inverse trapezium groove; the chassis is also provided with a longitudinal stiffening beam which is fixedly connected with the beams, and the upper surface of the stiffening beam is higher than that of the wood floor. When a cover plate covers the groove, the container of the invention is used as a common goods container; when the cover plate is opened, the container is used for transporting rolling goods; in the loading and unloading processes of the rolling goods, the wood floor of the container can not be damaged.

The invention discloses a method for producing circuit board thin plates. The technical scheme is characterized in that the method comprises the following steps that: conducting plating though holes; conducting outer layer circuit pattern transfer; conducting graph electric plating and etching; penetrating a string through locating holes of the circuit board thin plates, utilizing string beads to separate the circuit board thin plates, and plating the circuit board thin plates though the holes, after plating the circuit board thin plates through the holes, washing liquid medicine on the surfaces of the circuit board thin plates away by horizontally drawing the circuit board thin plates through a thick plate; conducting electric test; conducting routing; utilizing a plastic package tray to package a finished-product unit plate subjected to routing. From the procedure of layer circuit pattern transferring to the procedure of routing, the circuit board thin plates are compressed through pressing grooves by the adoption of a pig cage frame device to be transferred between the procedures. The method for producing the circuit board thin plate solves the problems that the circuit board thin plates are prone to plate adhesion, plate curving, plate clamping and plate fracture due to the fact that the circuit board thin plates are small in size. The method for producing circuit board thin plates is simple in process and stable in product quality.

The invention discloses a left abomasal displacement operative reduction apparatus for cattle. The left abomasal displacement operative reduction apparatus is applied to the field of animal medicine and is an operative instrument for treating left abomasal displacement for the cattle. The operative reduction apparatus comprises a reduction needle transmitting device and reduction needles with line binding holes. The reduction needle transmitting device comprises three transmitting tubes and a sensing positioning device. The left abomasal displacement operative reduction apparatus has the advantages that abomasal fixing lines can be accurately, efficiently and stably conveyed to target positions on the right sides of abomasal walls of the ill cattle without opening the right sides of the abomasal walls of the cattle; the probability of injury to the cattle due to reduction needle conveying errors can be eliminated; the conveying distances of the reduction needles can be increased owing to a retractable handle, so that the abomasa of the cattle with different body sizes can be assuredly reduced to perfect positions; potential risks caused after the reduction needles penetrate the abomasal wall of the cattle and fly out can be prevented; only one operative person is required for performing left abomasal displacement on the cattle by the aid of the operative reduction apparatus and can independently complete operation without assistants.

The invention discloses a safe lithium ion battery with a good cyclic performance. The safe lithium ion battery comprises a positive pole piece, a negative pole piece, and a diaphragm and electrolyte arranged between the positive pole piece and the negative pole piece; polymer carrier coatings are coated on the surfaces of the positive pole piece and the negative pole piece; a negative pole is made of a carbon and tin nano fiber composite thin film material. According to the safe lithium ion battery with good cyclic performance, the pulverization, the cracking and the reunion of pole materials are inhibited greatly so that the cyclic performance of pole materials can be improved and the stability of the poles can be kept; the negative pole material with good reversible specific capacity and cyclic performance is obtained; the separation is generated by the polymer carrier coatings so as to prevent a positive pole and the negative pole from being contacted to cause short circuit.

The invention discloses a translation type paperboard conveyer, and relates to the technical field of paperboard conveyance. The translation type paperboard conveyer comprises a rack, wherein a paper supporting unit, a paper feeding unit, a paper delivery unit and a bridge unit are sequentially arranged on the rack and along the forward direction of paperboards; the paper feeding unit comprises a first slide track; the extension direction of the first slide track is consistent to the forward direction of the paperboards; the first slide track is slidably provided with a main negative pressure box; the paper feeding unit also comprises an electromagnetic valve for controlling change of pressure in the main negative pressure box; the main negative pressure box comprises a paper supporting plate positioned on the upper portion of the main negative pressure box; the paper supporting plate is provided with a plurality of negative pressure air extracting holes by which the paperboards are adsorbed to the paper supporting plate; a front paper stopping plate is vertically arranged between the first slide track and the paper delivering unit; and an adjustable gap through which single pieces of paper can pass is formed between the lower end of the front paper stopping plate and the paper supporting plate. By the translation type paperboard conveyer, a pile of stacked paperboards can be stably conveyed and the single pieces of the paperboards are not scratched on the premise that integrity of printed images and texts of the paperboards is guaranteed and the quality of printed products is not reduced.

The invention provides a cylinder head cleaning machine which comprises a machine frame. A working table is arranged at the front of the machine frame and supported by a rotating mechanism, the rotating mechanism drives the working table to rotate, the upper portion of the working table is provided with a spray assembly and a wind cutting assembly, the lower portion of the working table is also provided with a spray assembly and a wind cutting assembly, the spray assembly and the wind cutting assembly which are located on the upper portion are arranged in a lifting mechanism and driven to move upwards and downwards through the lifting mechanism, the spray assemblies are connected with a liquid storage tank, a water receiving tank is further arranged below the working table and connected with the liquid storage tank, the wind cutting assemblies are connected with an air storage tank, and the liquid storage tank is connected with the spray assemblies through a bag filter and a spray cleaning pump or a spray rinsing pump. The cylinder head cleaning machine further comprises a main control cabinet arranged on the rear portion of the machine frame and an operation panel arranged above the working table.

The invention relates to an under-glaze colored decoration method of bone china. The method includes an under-glaze colored decoration firing process and a pigment preparation technology, which includes transferring figures through pigment paint or labels for porcelain to a biscuit after lower temperature biscuit firing at a temperature of 700-800 DEG C, covering a protective layer, buckling a decorated ware on a profiling kiln furniture, performing firing at a temperature of 1250-1290 DEG C, wherein figure surfaces cannot be bruised, performing polishing on figure bases after firing, spraying fritted glaze slip, and performing glaze firing at a temperature of 1170-1200 DEG C. The figure surfaces are arranged under a glaze layer completely, and the method is a novel color decoration different from bone china over-glaze color figure for in-glaze decoration. Blanks are performed biscuit firing at a low temperature, the figure bases are fired through oxidizing flames at a high temperature (1250-1290 DEG C), and vitreous enamels are fired through oxidizing flames at an intermediate temperature (1170-1200 DEG C). Compared with once-firing of under-glaze color figure through reducing flames at a high temperature, the method is a firing method in which the temperature and the flame property are completely different. Bottoms of high range gift porcelain products are glazed through lowtemperature glazes, and smooth and non-discoloring forever after firing at a temperature of about 800-850 DEG C.

The invention discloses a sealing device for a minimally invasive disposable puncture device, and relates to the sealing device matched with the minimally invasive disposable puncture device for use. The sealing device is a surgical instrument which is matched with minimally invasive endoscopy and suitable for laparoscopy and establishment of abdominal cavity operation working channels in the surgery process. The sealing device comprises a locking and fixing cover, an elastic sealing ring assembly, a compaction ring and a positioning guide cover; the upper end of the locking and fixing cover is provided with an installation platform which is provided with a plurality of positioning pillars; the elastic sealing ring assembly comprises an elastic sealing ring, elastic cloth, an upper fixing ring and a lower fixing ring; the elastic cloth is adhered to two sides of the elastic sealing ring; the upper fixing ring is fixed with lower fixing ring installation holes; the lower fixing ring is provided with sealing ring positioning protruded pillars; the upper fixing ring and the lower fixing ring are arranged on two sides of the elastic sealing ring to which the elastic cloth is adhered respectively; the elastic sealing ring assembly is arranged on the installation platform at the upper end of the locking and fixing cover; and the positioning guide cover is fixed on the upper part of the compaction ring through welding.

The invention relates to a method for preparing a laser rainbow code identifier, which mainly comprises the following steps of: 1, laser holographic plate making; 2, positioning die pressing; 3, positioning gravure; 4, positioning printing; 5, multilayer fine aluminum treatment; 6, coating compounding; 7, positioning printing of squeegee ink; and 8, forming. The method has the advantages that: 1, the production cost is low, raw materials used in the method can be purchased in a printing market without being imported, the process is controllable, the operation process is simple, and after a user scrapes the squeegee ink, a variable numerical code cannot be damaged, simultaneously is kept complete and clear and is favorable for the user to inquire information and truth or falsity of goods; 2, after multilayer aluminum treatment is carried out, data is completely displayed, the yield of the laser rainbow code identifier is consistent with that of the common laser holographic digital product and cannot be reduced; and 3, the laser rainbow code identifier prepared by the method has high anti-counterfeiting performance, the numerical code is difficult to damage and the product has higher individuation.