65 results about "Surface plastic" patented technology

The invention provides a double-sided plastic package structure of a vertical routing lead PIN, which can lead out more functional signals, reduce the front-end design pressure and improve the package integration level. The present invention comprises: a substrate; a front chip assembly and a device assembly; a back surface FC chip; a front plastic package body; a back surface plastic package body; a plurality of vertical welding wires; and a plurality of bumps; the substrate is a double-sided substrate, a front chip assembly and a device assembly are respectively bonded on the front surface of the substrate and are packaged through a front plastic package body, the height of the front plastic package body completely covers the height of the front chip assembly and the height of the device assembly, a back FC chip is bonded on the back surface of the substrate, and the height of the back FC chip is larger than that of the front plastic package body. A vertical welding wire is welded to each PIN pad on the back face of the substrate, a protruding block is welded to the tail end of the lower portion of each vertical welding wire, the back face plastic package body is packaged on the back face of the substrate, and the protruding blocks protrude out of the lower surface of the back face plastic package body.

The utility model provides a high-precision metal separator for plastic processing. The high-precision metal separator comprises a separation box body and a supporting column, according to the high-precision metal separator for plastic processing, when metal particles mixed in plastic particles for plastic processing are separated, the plastic particles to be separated are poured into a feeding hopper, then a power source is started, an electromagnetic coil is powered on to generate magnetism, then a motor is started, and the metal particles are separated; an output shaft rotates to drive a conveying roller at the front end to rotate on the inner side of a round frame, plastic particles in a feeding hopper are conveyed into a separation box body through the rotating end of a feeding groove and slide down along the outer side of an adsorption plate, and meanwhile metal particles in the plastic particles are adsorbed to the surface of the adsorption plate through a magnetic electromagnetic coil; and the plastic particles directly fall down to the bottom end of the separation box body and then slide rightwards into the material receiving box in the connecting frame to be collected.

The present invention discloses an integrated device for sorting and recycling plastic waste on water surfaces. The device comprises a collection robot and a base station. The collection robot comprises a hull, a collection device, a sorting device, and a lifting device mounted on the hull. The base station is fixed in a fixed position and comprises a guide device, a grabbing and moving device, and a storage device. The surface plastic waste is collected by the collection device and sorted and stored by the sorting device. The draft of the collection robot is adjusted by the lifting device based on the amount of waste stored in the sorting device. When the collection robot reaches the upper limit, the guide device enters the base station, and the grabbing and moving device recovers the waste stored in the collection robot and stores it in the storage device. The present invention can identify, sort, collect, transport, and store surface plastic waste.

The invention belongs to the technical field of material performance evaluation, and provides a metal material cavitation erosion incubation period prediction method based on surface plastic deformation analysis. The method comprises the following steps: carrying out cavitation erosion test on a sample; measuring the surface profile length of the sample in the cavitation environment, and calculating the surface area increment rate of the sample; drawing a surface area increment rate-time change curve, and obtaining an incubation period demarcation point and an incubation period end point of the sample; predicting the incubation period of the actual equipment according to the incubation period demarcation point and the incubation period end point; by analyzing the surface area increment rate of the material exposed in the cavitation environment, the incubation period is divided into two stages dominated by hardness and strain hardening indexes, a quantitative relation with the material performance is established, and non-destructive life prediction is achieved.

A tool for manufacturing plastic products comprises a metallic tool body and a hard coating that covers at least part of the metallic tool body. The hard coating has a surface against which the plastic product is molded during its manufacture. The surface of the hard coating includes a structured zone, which has a structure incorporated into the hard coating that is transferred to the plastic product during molding.

The utility model provides a mine rock slope supporting structure which comprises fixing beams and plastic particles, and the multiple fixing beams form a latticed structure and are used for being arranged on the surface of a mine rock slope. The plastic particles are arranged in the latticed structure, the surface of the mine rock slope is filled with the light plastic particles with good water permeability, the additional load of the slope can be reduced, secondary slippage caused by self weight is avoided, seepage rainwater can be rapidly drained through the good water permeability of the plastic particles, and pore water pressure can be reduced; secondly, a sealing layer is further formed on the surface of the side slope, the sealing layer can form a surface layer anti-scouring shell, the plastic particles are sealed in a latticed structure, the plastic particles and an anchoring structure below are protected, the broken rock mass is sealed and solidified, and the anti-scouring performance of the surface layer is improved. Surface rock blocks are prevented from falling off due to vibration or weathering, and the risk of local collapse is reduced.

The utility model relates to the technical field of plastic stirring tanks, and discloses a plastic stirring tank body which comprises a plastic tank and a balance weight seat, a plurality of supporting rods are vertically supported at the bottom of the plastic tank, a supporting plate is fixed at the bottom of each supporting rod and is supported on the surface of the balance weight seat, an upper plate is transversely fixed above the plastic tank, a motor of a stirrer is mounted on the surface of the upper plate, and the balance weight seat is fixed on the upper plate. A stirring rod of the stirrer extends into the plastic tank, the length of the upper plate is larger than the diameter of the plastic tank, and two parallel vertical plates are fixed to the lower portions of the two sides of the upper plate correspondingly. According to the technical scheme, the plastic tank is supported above the balance weight base, then the locking connecting plate is connected between the upper portion of the balance weight base and the lower portion of the transverse plate, the connecting plate can achieve the purpose that the plastic tank is pressed downwards and locked above the balance weight base in cooperation with the upper plate, and the supporting acting force can be provided for the upper plate; the whole gravity center of the device is located below, so that the device can work stably, and the upper plate is supported to prevent the upper plate and the motor from exerting larger downward pressure on the plastic tank.

The invention relates to the technical field of plastic recycling, in particular to a separating device for recycling waste plastic of a plastic hook-and-loop fastener, and solves the problems that when a hook face of the plastic hook-and-loop fastener is separated from a base material, a traditional separating method is too complex, the separating efficiency is low, and the amount of recycled plastic is small. A hot air stripping structure is arranged at the top end of one conveying mechanism, and a pushing mechanism is arranged at the top end of the other conveying mechanism. An adhesive layer connected between the hook face plastic and the polyester base material is softened and hot-melted through hot air of the hot air stripping structure, so that the hook face plastic and the polyester base material are not close to each other, and when the hook face plastic and the polyester base material pass through the material distributing mechanism, the hook face plastic and the polyester base material are separated through the surface of the triangular table; therefore, the plastic on the hook surface falls into the plastic collecting box, and the polyester base material falls into the polyester collecting box, so that the waste plastic of the plastic magic tape is recycled and separated.

The invention relates to an ultrasonic sensor (1) having an improved structural dynamic for a motor vehicle (20). The ultrasonic sensor (1) comprises: a plastic housing (2), a membrane assembly (3) arranged in a housing opening (4) of the plastic housing (2), the membrane assembly having an ultrasonic membrane (8), and a decoupling element (6) which is arranged between an inner surface (5) of the plastic housing (2) and the membrane assembly (3). A plurality of ribs (7, 71, 72) are formed at the inner surface (5) of the plastic housing (2), on which the decoupling element (6) rests against, and the ribs (7, 71, 72) are designed in such a way that the decoupling element (6) does not rest against the entire inner surface (5) of the plastic housing (2).

The utility model discloses an efficient solidification device for guardrail surface plastic spraying, and relates to the technical field of guardrail processing, the efficient solidification device comprises a solidification box and a top plate, one side of the solidification box is provided with an opening, heating plates are symmetrically installed on the inner walls of the two sides of the solidification box, and the inner wall of the top of the solidification box is provided with a strip-shaped groove; guide grooves are symmetrically formed in the inner walls of the two sides of the strip-shaped groove, a convex block is arranged on the outer wall of the top of the top plate, and the top plate is connected with the strip-shaped groove and the guide grooves in an embedded mode through the convex block. The motor drives the gear to rotate, the top plate can be driven to move through the meshing connection relation of the gear and the rack, and therefore a guardrail hung on the top plate can be driven to automatically enter and exit from the curing box, the situation that after curing is completed, workers need to enter the curing box to take out the guardrail can be avoided, high-temperature operation of the workers is avoided, and the working efficiency is improved. The working comfort and health of workers are guaranteed, and meanwhile the overall working efficiency can be guaranteed.

The utility model provides a plastic bag iron wire clothes hanger, which relates to the field of clothes hangers, and comprises an airing part on which clothes are hung and spread for airing; the hooking part is installed at the upper end of the airing part through an adjusting component, the hooking part can rotate at the upper end of the airing part to adjust the hooking direction, the airing part is of an obtuse-angle isosceles triangle structure with the vertex on the upper portion, and the airing part is formed by bending an iron wire with the surface wrapped with plastic. And the head and tail ends of the iron wires are twisted and wound and then the winding parts are wrapped with plastics. According to the clothes hanger, when low-weight clothes such as underwear or towels need to be quickly dried, the clothes needing to be aired can be hung on the airing part, then the whole clothes can be hung for airing through the hooking part, and due to the fact that the hooking part and the airing part are designed in a split mode and connected through the adjusting component, the clothes hanger is convenient to use. When the edge of an indoor cupboard needs to be hooked and aired, the hooking part can be rotated to enable the vertical airing part to be hung on the edge of the cupboard.

The invention belongs to the technical field of floor leather for public buses, and discloses an arrangement structure and a construction method of bus floor leather, the arrangement structure comprises an overall wide bottom floor leather which is laid on a floor without a wheel cover and a chassis; the facade floor leather is laid on the facades of the wheel cover and the side wall; an internal corner connecting node is arranged at the internal corner of the floor and the side wall or the wheel cover, and the floor leather on the bottom surface of the internal corner connecting node is integrally turned upwards by a set height; a fillet filler strip is mounted at the bottom of the internal corner, and the fillet filler strip is provided with two mounting surfaces perpendicular to each other and a concave arc transition surface; the bottom surface plastic flooring is adhered to the floor, the side wall or the wheel cover and the arc transition surface; arc-shaped grooves are formed in the connecting positions of the front vertical face, the rear vertical face and the side vertical faces of the wheel cover, and a plurality of V-shaped grooves are further formed in the front vertical face, the rear vertical face and the side vertical faces of the wheel cover. Butt seams are prevented from being generated at the bottom of the internal corner, and then water inlet points and bumps are prevented from being generated at the bottom of the internal corner; the service life of the public bus is ensured and the maintenance cost is reduced.

The utility model discloses a desktop molding press which comprises a machine body, a jig used for fixing a product to be subjected to film pressing, a first moving mechanism used for controlling the jig to move in the horizontal direction and a film pressing mechanism used for pressing a film on the product to be subjected to film pressing are arranged in the machine body, and the jig comprises a supporting seat and a limiting block arranged on the edge of the supporting seat. The limiting blocks located on the front side or / and the rear side of the supporting base and the supporting base are adjusted and positioned in the front-back direction, and the limiting blocks located on the left side or / and the right side of the supporting base and the supporting base are adjusted and positioned in the left-right direction. The film pressing mechanism comprises a roller, a rotating mechanism for controlling the roller, a lifting mechanism, a Y-axis moving mechanism and an X-axis moving mechanism. According to the film pressing device, film pressing treatment is carried out on a product subjected to manual film pasting, pressing treatment is carried out on the periphery of a plastic film on the surface of the product, the film pressing device can be suitable for film pressing of products of different models or sizes, manual operation is simplified, and efficiency is improved.

The utility model provides a winding and welding all-in-one machine which is characterized by comprising a machine frame, a winding mechanism and a welding mechanism, the rotating disc module comprises a rotating disc rotatably arranged on the rack along the vertical axis and a fixed disc which is arranged on the rack in a non-rotatable mode and located over the rotating disc, and a winding station, a peeling station and a welding station are sequentially arranged in the rotating direction of the rotating disc; the winding module is arranged at a winding station on the rack and is used for winding a coil; the laser module is arranged at a peeling station on the rack and is used for removing surface plastics at partial positions on two wire ends of the coil; and the welding module is arranged at the welding station on the rack and used for welding the part, where the surface plastic is removed, of the wire end of the coil to the material belt.

The utility model discloses a surface plastic -spraying equipment is used in safety door production, including work table, the upper end fixed mounting of work table has the fixed frame, the left and right two ends of fixed frame all are established with a sliding slot, the inside activity of left side sliding slot is inserted and connected with the screw rod, the lower fixed mounting of screw rod has first motor, and first motor is fixed at the bottom of work table, the outer surface screw thread connection of screw rod has the sliding block, aims at solving the problem of low -efficiency plastic -spraying. Its technical scheme main points are: a surface plastic -spraying equipment is used in safety door production. The utility model second motor drives the rotation of the pivot, thereby drives the rotation of the safety door on the placement turntable, and the cooperation positioning pressboard always plays good down -pressing positioning when the safety door is machined or rotates, can conveniently adjust the position of safety door, need not manual overturn and reposition, greatly improves the plastic -spraying efficiency, satisfies market demand.

The present invention relates to the field of cloth technology, and specifically discloses a cloth-plastic composite material and a preparation method thereof. The cloth-plastic composite material comprises a cloth layer and a plastic coating, wherein the plastic coating is applied to the surface of the cloth layer; the plastic coating is made of a composite plastic coating, and the composite plastic coating comprises the following components in parts by weight: 1000 parts of a solvent; 95-105 parts of a PVC resin; 36-38 parts of a modified alumina powder; 1-2 parts of an antioxidant; 3-5 parts of a composite oil-soluble plant extract; the composite oil-soluble plant extract is a compound of rosemary extract, white thorn seed oil, and hibiscus oil; the modified alumina powder is modified by the following method: adding the alumina powder to a modifying liquid, mixing uniformly, filtering, and drying to obtain the modified alumina powder; the modifying liquid is a compound of deionized water, a silane coupling agent, and a nonionic surfactant. The present invention has the advantages of making the production process of tent cloth more convenient and the process difficulty relatively simple.

The invention belongs to the technical field of packaging integrated chips, and relates to a six-surface packaging method for a 3D integrated chip. The method comprises the following steps: mounting a plurality of 3D integrated chips on a first wafer substrate; carrying out five-surface plastic package on the plurality of 3D integrated chips, thinning the plastic package of one side, far away from the first wafer substrate, of the plastic package wafer, and exposing the chips; etching a micro-channel and manifold channel structure on the back surface of the exposed chip; bonding a second wafer substrate on one side of the exposed chip of the plastic package wafer; performing pressed film encapsulation on one side of the plastic package wafer, which is provided with the external interconnection structure, and partially removing encapsulation on the external interconnection structure by adopting an ultrafast laser technology to expose the external interconnection structure; a heat dissipation cover plate is bonded and sealed on one side, provided with the micro-channel and manifold channel structure, of the chip; and preparing a solder ball connected with the external interconnection structure on the plastic package wafer. The external interconnection structure of the integrated chip is simplified, and the packaging process efficiency and reliability are improved.

The utility model discloses a cable surface plastic layer processing device, which comprises a shaping cabin, a water cooling cabin and an air cooling cabin, the shaping cabin and the air cooling cabin are respectively arranged at two ends of the water cooling cabin through flange plates, spiral distribution pipes are uniformly arranged on the inner side of the water cooling cabin, a cooling water tank is arranged at the bottom of the water cooling cabin, and the spiral distribution pipes are connected with the cooling water tank. A circulating water pump is installed in the cooling water tank, the output end of the circulating water pump is fixedly connected with the input end of a spiral distribution pipe through a guide pipe, and spraying heads are evenly arranged on the inner wall of the spiral distribution pipe. According to the utility model, the coated cable enters the water cooling cabin immediately, and the spiral distribution pipes uniformly arranged on the inner side of the water cooling cabin are provided with the spray heads, so that the plastic layer can be cooled and cured quickly under the action of cooling water. Therefore, the surface of the plastic layer is quickly cured, and the problem of deformation caused by non-uniform cooling is avoided, so that the surface quality and the production efficiency of the cable are improved.

The invention relates to the technical field of plastic spraying equipment, in particular to an automatic stamping part surface plastic spraying assembly line which comprises a gun body and a spray head, a gas transmission main channel, a gas transmission branch channel and a coating channel are arranged in the gun body, and the spray head is in threaded connection to the front end of the gun body and provided with a paint spraying opening and a plurality of gas spraying openings. The air nozzle is communicated with the air transmission main channel through the air transmission branch channel; according to the device, the shearing wheel and the stirring wheel which rotate oppositely are arranged, the shearing gap is formed between the shearing wheel and the stirring wheel, particles, larger than the shearing gap in size, in a coating can stay in the shearing gap, and the stirring wheel and the shearing wheel can generate a shearing effect on the particles staying in the shearing gap; after the shearing action of the shearing wheel and the stirring wheel, the size of the sheared particles is smaller than the diameter of the paint spraying opening, and the sheared particles can be discharged from the paint spraying opening; and particles in the coating are prevented from blocking the paint spraying opening, and the discharging uniformity during spraying is guaranteed.

The present application relates to the technical field of chemical detection, and particularly relates to a method for measuring the quality and content of plastic-wrapped gold products, comprising the following steps: S1, placing the plastic-wrapped gold product to be detected into DMF, heating to above 150 DEG C, heating for 10-15 min, taking out, tearing off the surface plastic wrapping, and obtaining a gold product containing gum; S2, performing oxidation cupellation treatment on the gold product containing gum to remove the surface gum part, and obtaining a treated gold product; S3, weighing the gold mass in the treated gold product, and detecting the gold content in the treated gold product by using fire assaying method. The present application can effectively remove various types of plastic wrapping materials and gum through the combined application of DMF preliminary treatment, composite sol agent pretreatment, multi-stage oxidation cupellation and fire assaying method, while maximizing the protection of the gold product itself, and significantly improving the efficiency and precision of the quality and content measurement of the plastic-wrapped gold product.

This invention relates to the field of profile surface treatment technology, specifically to a pre-treatment device and process for powder coating molding of outdoor product profiles that requires no cleaning. The device includes a treatment mechanism, an air collection mechanism, and a negative pressure mechanism. The treatment mechanism includes a through-type polishing machine. In this invention, during startup of the through-type polishing machine, its output end drives the chuck to rotate. Then, the crank, through a push-pull plate and a transmission plate, influences the piston rod to reciprocate up and down. Under the constraint of the air outlet, air inlet, and two one-way valves, the air cylinder continuously creates a negative pressure environment within air tanks one and two, preparing for the subsequent suction of impurities from the profile surface. When the polished profile approaches a photoelectric sensor, the sensor detects the incoming material and transmits the incoming material signal to an external PLC. The external PLC opens solenoid valves one and two, causing air tanks one and two to instantly suction away impurities from the profile surface through air pipes, thereby completing the cleaning purpose.

1. Name of the design product: Two-dimensional code protection glass cover (I). 2. Use of the design product: used to cover the surface of two-dimensional code, plastic shell embedded glass and silica gel pad, used for waterproof. 3. Design points of the design product: in shape. 4. Picture or photo that best shows the design points: perspective view.

The invention discloses a curved-surface plastic panel and a processing method and device thereof, and the processing method comprises the steps: firstly forming a hard layer, an optical function layer and a printing layer on a planar plastic substrate, cutting the planar plastic substrate into a preset shape, and then carrying out curved-surface hot-pressing processing on the planar plastic substrate through a curved-surface hot-pressing device, so that the planar plastic substrate becomes a plastic substrate with a curved surface. Due to the fact that the hard layer, the optical function layer, the printing layer and CNC cutting are all carried out on the plane plastic substrate, the yield is high. The curved surface hot pressing device can synchronously carry out hot pressing forming in the heating process, has the functions of monitoring the local temperature and the local curvature forming state in real time, and then feeds back the local temperature and the local curvature forming state to a heating local mechanism for adjustment, so that the production yield is improved. Through a high polymer material formula, a coating formula design and a precise coating technology, the extensibility of the high polymer surface can be improved to the level of hot bending processing, and the original optical and physical characteristics can be maintained after various weather resistance tests.

The invention relates to a lithium battery protection plate structure with double-sided device layout and double-sided plastic package and a manufacturing method thereof. The lithium battery protection plate structure comprises a rigid PCB (Printed Circuit Board) substrate, a front plastic package layer and a back plastic package layer, a battery protection chip and a precision resistor are mounted on the front surface of the rigid PCB substrate, and an MOS switch chip and a solder ball array are mounted on the back surface of the rigid PCB substrate; a front surface plastic package layer covering the front surface protects the battery protection chip and the precision resistor; the back plastic package layer covering the back wraps the MOS switch chip and exposes the solder ball array; wherein the welding height of the welding ball array is higher than the surface of the MOS switch chip. According to the lithium battery protection plate structure provided by the invention, through reasonable layout and plastic package design, the space of a circuit board is utilized to the maximum extent, the overall size of the protection plate is reduced, and the protection performance and the welding reliability are improved. The invention further provides a manufacturing method of the protection plate, double-sided processing conflicts can be avoided, the production yield is improved, the influence of thermal stress on the sensitive device is reduced, and the method is suitable for large-scale efficient production.

The invention discloses a high-density ultrathin lead frame packaging process and packaging structure, and belongs to the technical field of semiconductor packaging. The process comprises the following steps of: manufacturing a lead frame (photoetching and etching the front surface of a copper foil to form a superfine circuit less than or equal to 30 microns, and plating silver on the back surface), mounting and welding components, performing plastic packaging and curing on the front surface, etching a circuit on the back surface, performing insulation protection on the back surface, and manufacturing an electrode metal protection layer, wherein an ultrathin substrate less than or equal to 40 microns is adopted. The cost is reduced through a single-side etching film-free design, an ultrathin structure is realized through back etching after plastic packaging, the flexibility is improved through a suspension circuit design, and the packaging structure is compatible with various packaging forms such as LGA and PGA. The prepared lead frame has the characteristics of high density and ultra-thinness, can solve the problems of low density, large thickness and high cost of a traditional process, is suitable for miniaturized and highly integrated electronic equipment, and has remarkable economic benefits and application values.

The invention discloses a post-treatment method for additive manufacturing austenitic stainless steel and the additive manufacturing high-strength and high-plasticity austenitic stainless steel. The post-treatment method is combined with surface plastic deformation treatment and low-temperature heat treatment to excite the interior of the austenitic stainless steel to form a high-density nano-twin crystal structure, and comprises the following steps: carrying out surface plastic deformation treatment on an austenitic stainless steel base material subjected to additive manufacturing; and the austenitic stainless steel subjected to surface plastic deformation treatment is subjected to low-temperature annealing treatment, the annealing temperature ranges from 150 DEG C to 400 DEG C, the annealing treatment heat preservation time ranges from 1 h to 10 h, and the austenitic stainless steel of the high-density nano-twin crystal structure is prepared. The austenitic stainless steel obtained through treatment has high strength and high plasticity at the same time, the yield strength ranges from 710 MPa to 840 MPa, and the elongation at break ranges from 58% to 96%.

The utility model provides a multi-touch sensing seat back plate which comprises a polyurethane foaming layer and an epidermal layer, the epidermal layer comprises a fabric layer, a composite cotton layer and a plastic film layer which are sequentially arranged from outside to inside, the epidermal layer is laid on the inner surface of a lower mold cavity of the seat back plate, the plastic film layer is in contact with the polyurethane foaming layer, and the polyurethane foaming layer is in contact with the composite cotton layer. The seat back plate further comprises a gesture grabbing inductive switch, and the polyurethane foaming layer is formed in the seat back plate upper mold cavity and the seat back plate lower mold cavity in a pouring mode through sectional density foaming. The segmented density foaming polyurethane foaming layer serves as a main body of the seat back plate, multiple soft touch of the seat back plate is guaranteed, customization of different hardness of the seat back plate can be conducted according to the requirements of a user, and the use experience of the user is improved; the surface layer is arranged, so that the basic performances of the seat back plate, such as wear resistance, shock absorption, ventilation and waterproofness, are ensured; a gesture grabbing inductive switch is arranged on the rear side, when nobody sits on the front seat, a passenger on the rear seat can conveniently adjust the position of the seat, a larger space is obtained, and use is convenient.

The present invention relates to the technical field of titanium alloy surface treatment, and specifically to a titanium alloy wear-resistant and ablation-resistant composite strengthening layer and a preparation method thereof. The surface of a titanium alloy substrate is ground and then ultrasonically cleaned; a mechanical shot peening method is used to perform surface plastic deformation pretreatment on the cleaned titanium alloy to form a diffusion channel; plasma nitriding is performed on the titanium alloy after surface plastic deformation to obtain a titanium alloy with a surface composite strengthening. Based on the poor wear resistance and ablation resistance of traditional titanium alloys, the present invention uses a spraying composite technology that combines mechanical shot peening and plasma nitriding to prepare a wear-resistant nanocrystalline structure compound layer, an ablation-resistant aluminum-rich layer and an anti-fatigue diffusion layer on the surface of the titanium alloy. The composite strengthening layer has good wear resistance and ablation resistance, can effectively improve the wear and ablation characteristics of the titanium alloy hot end components, and improve the service reliability and safety of the titanium alloy hot end components.

The utility model relates to a bolt for connecting plates, the bolt comprises a bolt head, a bolt body and a hole part, the bolt head, the bolt body and the hole part are sequentially connected, the cross section of the hole part is quadrangle with arc transition corner, the side of the hole part has certain radian R, the cross section quadrangle of the hole part gradually expands from the tip to the bolt body end, the bolt head comprises a driving part and a flange part, the flange part is connected with the bolt body, the connecting place of the flange part with the bolt body is provided with annular recess for accommodating the slag generated in the plate connecting process. The application adopts the hole part of four sides, the side has certain radian R, the quadrangle with radian R shape is more helpful to the bolt assembly process, makes the connecting plate surface plastic flow faster, the assembly torque is smaller, makes the clamping force of the bolt to the plate larger.

The utility model relates to the technical field of guardrail processing, in particular to a guardrail surface plastic spraying device, which comprises a box body, two side plates, a driving component and a fixing mechanism, the two side plates are respectively arranged on two sides of the box body, the driving component is arranged between the two side plates, the fixing mechanism is arranged inside the box body, and the fixing mechanism is arranged on the box body. The fixing mechanism comprises a sliding plate, a first motor, a rotating ring, a rotating plate, a first hook and two limiting assemblies, the first motor is fixedly connected with the sliding plate, the rotating plate is fixedly connected with the output end of the first motor, the first hook is fixedly connected with the rotating plate, one end of the rotating ring is fixedly connected with the rotating plate, and the other end of the rotating ring is rotationally connected with the sliding plate; through the arrangement of the structure, the problems that in the prior art, after one side of a guardrail is sprayed, the guardrail needs to be manually rotated, the other side of the guardrail is sprayed, operation is very tedious, and the spraying efficiency is affected are solved.