171 results about "Chrome plating" patented technology

The invention discloses a weaving machine metal part with a low-friction coating and a manufacturing method of the weaving machine metal part, and belongs to the technical field of textile machinery. A body is subjected to heat treatment, magnetic flow grinding, alkaline degreasing, acid activation, ultrasonic cleaning and plasma activation, then a chromium electroplating transition layer or a chemical plating Ni-P transition layer is applied, suspension liquid spraying or powder spraying or dipping is used, sintering curing is cooperated, a PTFE self-lubricating layer is applied, and the self-lubricating composite material is obtained. And finally, the compact Ni / Cr-PTFE-based composite coating is formed on the metal part of the weaving machine. The PTFE self-lubricating layer provides an extremely low friction coefficient, and yarn abrasion and part temperature rise are remarkably reduced; and the Ni / Cr transition layer greatly enhances the bonding strength of the PTFE layer and the steel substrate, and effectively prevents stripping and micro-cracking of the coating in high-speed weaving, so that effective protection of high-performance fibers is synchronously realized, and the service life of parts is remarkably prolonged.

The invention relates to an intelligent roller grinding method for producing high-surface-grade strip steel. The intelligent roller grinding method comprises the steps that S1, the surface of a roller is plated with chromium; s2, a model approximator of the relation between the roller surface roughness and the grinding process state parameters is established; wherein the grinding process state parameters comprise the roller speed, the grinding depth and the grinding wheel speed; and intelligent roughness identification is achieved by optimizing state parameters in the grinding process. According to the method, the surface roughness of the roller is predicted online by establishing the roughness and grinding process state parameters, so that high-quality and high-efficiency production of cold-rolled high-grade surface products is supported, and it is guaranteed that a unit operates stably and the product quality meets the requirement.

The invention belongs to the technical field of metal surface treatment, and discloses an electroplating additive suitable for a steel and alloy surface bright wear-resistant corrosion-resistant hexavalent chromium coating, which is characterized by comprising an organic compound, an inorganic acid, a metal inorganic compound and water, the organic compound comprises a mixture of a fluorine-free compound and a fluorine-containing compound. The method can be widely applied to decorative chromium plating and functional hard chromium plating, the electroplating temperature is 40-70 DEG C, the electroplating time of the decorative chromium plating is 1-10 min, the electroplating time of the hard chromium plating is 20 min or above, the hardness can reach 900 HV or above, the glossiness of the surface of a workpiece can be kept through the decorative plating and the hard chromium plating, the current efficiency can reach about 23%, and the service life of the workpiece is prolonged. The current use requirements of high efficiency, stability and environmental protection are met, and the market prospect is good.

A cooktop according to one embodiment of the present disclosure may include a cooktop body, a ceramic glass disposed on the upper part of the cooktop body and having a through-hole formed in a part thereof, a bracket disposed on the through-hole, a glass member coupled to the bracket so as to be disposed within the through-hole, and a display device disposed on the lower side of the glass member. The bracket may include a metal member and a chrome coating layer coated on the metal member.

The invention relates to the technical field of plasma injection, and discloses a plasma beam injection system in a chromium plating machine, which comprises an electroplating bin, a bin door matched with the electroplating bin is arranged on one side of the surface of the electroplating bin, and a workpiece clamping mechanism is arranged in the electroplating bin and is used for clamping and fixing a workpiece and driving the workpiece to rotate while revolving. Plasma beam emitting mechanisms are arranged on the two sides of the inner wall of the electroplating bin and used for emitting plasma beams. According to the plasma spraying device, the plasma beam can cover the surface of the workpiece without dead angles, the problems of spraying leakage and stacked spraying caused by single movement are effectively avoided, a bidirectional spraying pattern can be formed, the coating uniformity and the coating bonding strength are improved, and therefore the spraying requirement of the workpiece can be better met.

The utility model provides a liquid expansion mandrel fixing device for processing a hard chromium plated ball, which belongs to the technical field of hard chromium plated ball processing, and comprises a mandrel main body, and the inner part of the mandrel main body is divided into cavities and is used for realizing uniform expansion; a filling hole is formed in one side of the core shaft main body and is used for filling a hydraulic medium into the core shaft main body; a sealing screw is arranged at an opening of the filling hole; an expansion chamber and a compression chamber are arranged in an inner cavity of the mandrel body, the compression chamber is arranged on one side of a center shaft of the mandrel body, and a linkage structure is arranged in the compression chamber and used for clamping a ball. The utility model provides a liquid expansion mandrel fixing device for processing a hard chromium plated ball, which can solve the problems that the clamping force is concentrated on a local area and a plating layer is easy to crush due to the single-cavity design of the existing liquid expansion mandrel.

The present invention relates to the use of a trivalent chrome plating bath composition for the electrodeposition of a hard chrome layer with a thickness of 1 µm or more, the composition comprising (A) trivalent chromium ions in an amount of 5-40 g / l, (B) at least one anion selected from sulfate, chloride, bromide and methanesulfonate, (C) at least one carboxylate ion selected from formate and acetate, (D) at least one buffer substance selected from ammonia, boric acid, carboxylic acids with 2 to 8 carbon atoms other than component (C) and salts thereof, and aluminium salts, and (E) 0.01 to 100 g / l of at least one specific compound which comprises a sulfonate group and a sulfide or disulfide group. Other aspects of the invention relate to a hard chrome plating process, a hard chrome plating layer and a hard chrome plated article.

The invention discloses a method for preparing a hydrophobic coating on an electroplated chromium surface, which comprises the following steps: adding dispersion liquid of nano particles into chromium plating liquid to obtain composite chromium plating liquid, and electroplating a workpiece by using the composite chromium plating liquid to obtain a chromium plating layer, the nano particles are at least one of silicon dioxide, silicon carbide or silicon nitride, silica sol and silicon-fluorine-containing resin are sequentially applied to the chromium plating layer, and the hydrophobic coating is obtained after drying. According to the invention, the nano particles are doped with the electroplated chromium, the chromium plating layer contains Si, so that Si-OH bonds are formed on the surface of the electroplated chromium, silica sol is used as a silicon transition layer, the lower part of the silica sol can form Si-O-Si chemical bonds with Si-OH in the chromium plating layer, and the upper part of the silica sol can form Si-O-Si chemical bonds with Si-OH bonds in silicon-containing fluorine resin; and the binding force of the hydrophobic coating and the chromium plating layer is greatly improved.

METHOD AND PROCESS FOR VACUUM PLATING FOR BONDING PLASTICS The invention provides a method and process for vacuum plating for bonding plastics. By uniformly applying a semi-transparent primer to the back of the plastic substrate, the invention improves adhesion and cohesion between the vacuum plating and the substrate, preventing the plating from detaching or puckering during prolonged use. By using an opaque black paint as a chrome- or aluminized-type vacuum plating, the invention effectively prevents light leakage. The interposition of the semi-transparent primer between the plastic substrate and the vacuum plating enhances adhesion and cohesion, as well as resistance to hot and humid environments.Adding a protective varnish to the back increases the reliability of the bond while eliminating traces of the glue layer. Figure to be published with the abbreviation: Figure 1.

A light guide enabled lamp includes a light guide. A light source positioned at an edge of the light guide directs light generated by energizing the light source throughout a length of the light guide reflective layer disposed on the light guide. A reflective layer is disposed on the light guide. A graphics pattern is formed on the light guide defining nano-scale optic patterns by a surface etching of the light guide. A polymeric material coating is applied over the light source, the light guide and the reflective layer. A coating is applied over the polymeric material coating using one of a wet coating process, a dry coating process, an in-mold injection-compression or lamination film application, and a post molding process.

The invention discloses a piston rod manufacturing technology, and aims to provide a piston rod for a shock absorber of a refitted vehicle and a manufacturing method of the piston rod, the main points of the technical scheme are as follows: the piston rod comprises a rod body structure: a hollow piston rod main body made of 40Cr alloy steel material is adopted, the surface of the piston rod main body is subjected to high-frequency quenching treatment to form a hardening layer, the depth of the hardening layer is 0.5-0.9 mm, and the thickness of the hardening layer is 0.5-0.9 mm; the hardness is 50 to 57 HRC; a microcrack chromium plating layer is further arranged on the surface of the piston rod main body, the thickness of the plating layer is 0.02 + / -0.005 mm, the hardness is 800-1200 HV, and the microcrack density is larger than or equal to 500 strips / cm; the circulating oil liquid adjusting mechanism is a circulating oil liquid adjusting control mechanism integrated in the piston rod body and comprises an adjusting rod valve element coaxial with the piston rod body and an O-shaped sealing ring matched with the adjusting rod valve element, the adjusting rod valve element accurately controls the flow and pressure of oil liquid through axial displacement, and continuous adjustment of damping is achieved; adjusting the input assembly; an additional circulation channel; the invention is suitable for the technical field of piston rod manufacturing.

The invention belongs to the technical field of metal material surface treatment, and discloses a production process of a weldable electroplated chromium plate. According to the process, cluster-shaped peak morphology is transferred on the surface of a cold-rolled steel coil through a laser texturing roller, and staged double-layer chromium electroplating is combined, specifically, a discontinuous chromium layer is formed on the top of a micro convex peak through first-time high-current pulse electroplating, and local iron leakage points are reserved; the second low current direct current plating covers an ultrathin continuous chromium film to maintain macro passivation. According to the invention, a composite functional structure with both macroscopic passivation integrity and microcosmic conductive selectivity is constructed on the surface of chromium-plated iron by accurately controlling the microstructure of the surface of a base material and double-layer chromium plating process parameters, so that the technical bottleneck of the chromium-plated plate in resistance welding application is effectively solved, collaborative optimization of weldability and corrosion resistance is realized, and the application range of the chromium-plated plate in resistance welding is widened. And a reliable technical path is provided for comprehensive replacement of chromium-plated iron in the field of metal packaging.

The invention discloses a water electroplating process for a PC / ABS (polycarbonate / acrylonitrile-butadiene-styrene) material thin decorative part. The water electroplating process comprises the following treatment steps: pretreatment; activating treatment: after the surface of the thin decorative part made of the PC / ABS material is roughened, the rough surface of the thin decorative part made of the PC / ABS material is activated, so that the rough surface of the thin decorative part made of the PC / ABS material can accept deposition of plating metal; chemical plating treatment: carrying out chemical nickel plating treatment on the to-be-plated surface of the PC / ABS material thin decorative part; electroplating treatment: carrying out copper plating treatment, nickel plating treatment and chromium plating treatment on the chemical nickel surface of the PC / ABS material thin decorative part; wherein the thickness range of the plated copper is 24-28 [mu] m, the thickness range of the plated nickel is 1-3 [mu] m, and the thickness range of the plated chromium is 0.01-0.04 [mu] m; and post-treatment: carrying out cleaning treatment and drying treatment on the electroplated PC / ABS material thin decorative part to obtain the PC / ABS material thin decorative part. By means of the water electroplating process, the problem that the strength of the PC / ABS material decorating part is poor after water electroplating can be solved.

The invention discloses a chromium coating crack repairing method and device based on high-pressure water repellent filling, and the method comprises the steps: selecting high-pressure gas according to the working or testing pressure of a part, and extruding a water repellent into a crack gap of a chromium coating by using the selected high-pressure gas; in the extrusion process of the water repellent, the water repellent is driven to reciprocate on the surface of the chromium layer of the part, and dynamic infiltration is achieved; after the crack gap is filled with the water repellent, curing of the water repellent on the surface layer and the root is accelerated in a heating mode, the water repellent is prevented from flowing out, and blocking of the crack gap is achieved; and honing the surface of the chromium layer by using a honing device, removing the water repellent on the surface, and improving the surface roughness. Therefore, the water repellent can permeate into the air hole or the root of the crack to fill the whole crack, so that the compactness of the chromium layer and the qualified rate of the air tightness test of the chromium layer are effectively improved.

A method for manufacturing a plated member according to the present invention comprises: a plating step in which a hard chromium plating film is formed on the surface of a plated member using a plating solution containing trivalent chromium as the main component; and a polishing step or a grinding step in which, after the plating step, abrasive grains crushed under a pressing load of 580 + / -80 mN in a crushing test using the nanoindentation method (ISO 14577) are used to perform the polishing step or the grinding step.

The invention discloses a full-automatic chromium plating system, and relates to the technical field of chromium plating, the full-automatic chromium plating system comprises a system frame, a control panel end and a chromium plating process module, the chromium plating process module is formed by arranging a plurality of process grooves, a crane mechanism is installed on the system frame, the control panel end controls the moving track of the crane mechanism, and the control panel end controls the moving track of the crane mechanism. And through integrated design and programmed control, the quality leap of the chromium plating process is realized. The device has the core beneficial effects that the full-automatic traveling mechanism and the accurate positioning and connecting assembly are taken as the core, so that absolute accuracy and stability of workpiece transmission among multiple complex procedures are ensured, manual operation errors are eliminated fundamentally, and extremely high quality consistency and reproducibility of products are ensured; through an original'bottom chromium-transition chromium-surface chromium 'triple dynamic thickness distribution process, the thickness ratio of each functional layer is intelligently optimized, the binding force, the internal stress and the surface performance can be perfectly balanced under any total thickness requirement, and a top-level coating which is firm in combination and resistant to abrasion and corrosion is produced.

This invention provides a functional cyanide-free silver plating method and coating structure, belonging to the field of metal surface treatment technology. This invention adds a trivalent chromium plating layer between the cyanide-free copper plating layer and the cyanide-free silver plating layer prepared by existing technology. The trivalent chromium plating layer provides electrochemical protection to the underlying copper plating layer, and the resulting coating structure effectively prevents corrosive media from eroding towards the substrate. The trivalent chromium plating layer has excellent corrosion resistance, effectively resisting corrosion from corrosive media, overcoming the defect of copper rust easily appearing on the surface of parts plated directly on copper plating layers. Simultaneously, by controlling the composition of the plating solution and adding lanthanum chloride heptahydrate and praseodymium chloride heptahydrate, the two have a synergistic effect, further improving the corrosion resistance of the plated parts.

The invention provides a production method of a novel environment-friendly micro-carved pattern glass paperboard, which comprises the following steps: selecting a film as a base material, printing a red cursor on the film, and coating UV gloss oil; selecting an ivory board as backing paper, utilizing UV gloss oil as an adhesive, and compounding the transfer film with the ivory board, so that the red cursor is transferred to the ivory board; fine lines are engraved on the surface of the roller base material through the laser engraving technology, the surface of the roller is subjected to chromium plating treatment after engraving is completed, and the micro-engraved grain gravure roller is manufactured; feeding the compounded paper into embossing equipment, and carrying out embossing treatment by utilizing a micro-carving pattern gravure cylinder, so that micro-carving patterns are transferred to the surface of the paper; the embossed paper is fed into a UV curing device, the curing power is adjusted to cure the UV coating layer, the film on the surface of the paper is stripped after curing is completed, and the glass paperboard with the miniature carving pattern is obtained.

This invention discloses a process and coating structure for rare earth modified trivalent chromium pearl chromium plating on zinc alloys. The process includes sequentially preparing a cyanide-free copper plating layer, a cyanide-free copper-zinc alloy plating layer, a high-corrosion-resistant nickel-phosphorus alloy plating layer, a bright nickel-cobalt alloy plating layer, a pearl nickel plating layer, a rare earth modified trivalent chromium pearl chromium plating layer, and an anti-discoloration protective film on a zinc alloy substrate. The rare earth modified trivalent chromium pearl chromium plating process is as follows: chromium chloride hexahydrate 90-130 g / L, potassium chloride 90-160 g / L, ammonium chloride 90-160 g / L, ammonium bromide 18-28 g / L, ammonium formate 40-60 g / L, boric acid 45-65 g / L, rare earth additives 8-12 mL / L, leveling agent 2-4 mL / L, accelerator 1-3 mL / L, plating bath pH 2.5-3.2, plating bath temperature 25-35℃, and cathode current density 8-16 A / dm². The rare earth additives have a synergistic effect on improving the performance of trivalent chromium plating solution. No rust was observed on the surface of the plated parts after undergoing a neutral salt spray test for 132 hours according to GB / T 10125–2021 standard.

This invention relates to the field of electroplating technology, specifically to a multi-channel, two-layer hard chrome plating production equipment. The invention includes an automatic feeding mechanism, a pre-plating treatment mechanism, an electroplating tank, a plating conductive mechanism, and an automatic unloading mechanism. Multiple sets of electroplating tanks and plating conductive mechanisms are provided, and these sets are staggered. The pre-plating treatment mechanism includes a cleaning mechanism and a pre-plating conductive mechanism. By setting up a double-layer electroplating tank and separating the two plating pools with partitions, and installing an anode ring corresponding to the inlet in the electroplating tank, along with a duckbill valve, the workpiece can pass through easily, and plating solution loss can be reduced. This allows the electroplating tank to electroplat workpieces in two layers through multiple channels, improving resource utilization efficiency. Combined with a spiral infusion pipe and infusion seat arranged in a circumferential array, plating solution is continuously replenished to the two plating pools, forming a spiral water flow that can remove air bubbles from the workpiece surface, effectively improving electroplating quality.

The utility model discloses an injection-molded part chromium plating device, which relates to the technical field of injection-molded part chromium plating and comprises a box body, a chromium plating groove is arranged on the box body, a support is arranged on the outer wall of the top of the box body, an electric lifting rod is mounted on the support, and the extension end of the electric lifting rod penetrates through the support and is fixedly connected with a connecting frame. A placing frame is fixedly connected to the outer wall of the bottom of the connecting frame, an adsorption cover is arranged on the connecting frame, a filter box and an induced draft fan are arranged on the side wall and the outer wall of the top of the support correspondingly, and a first ventilation groove, a second ventilation groove and a connecting groove are formed in the filter box correspondingly; connecting holes are formed between the connecting grooves and the first ventilation grooves and between the connecting grooves and the second ventilation grooves. When the filter plate is replaced, shutdown operation is not needed, and toxic gas is filtered and purified by the filter plate all the time, so that the device can continuously carry out chromium plating treatment on an injection molding part, and the chromium plating efficiency can be effectively improved.

The utility model discloses a kind of glass slits, which are divided into light-transmitting area (2) and non-light-transmitting area (1). The width of the light-transmitting area (2) is 15 or 30, and the light-transmitting area (2) is coated with an anti-reflection film with a transmittance of more than 96%. The non-light-transmitting area (1) is coated with an absorbing film with an absorption rate of more than 96%. The preparation method of the glass slit involves substrate processing, gluing, film coating, and peeling, etc. The light-transmitting area (2) of the glass slit has a transmittance of more than 96%, ensuring the luminous flux of the optical system. The non-light-transmitting area (1) uses an absorbing film, avoiding stray light introduced by multiple reflections of traditional chrome plating on optical lenses. The preparation method avoids the large size error of traditional laser cutting and the burr phenomenon of the slit, improving the production qualification rate of the slit and reducing the cost.

This invention relates to a Ni-W-SiC electroplating solution, a composite coating, its preparation method, and its application. The Ni-W-SiC electroplating solution provided by this invention includes a pre-plating solution and a composite plating solution. The pre-plating solution includes NiSO4·6H2O, a buffer, and a conductive salt. The composite plating solution includes NiSO4·6H2O, Na2WO4·H2O, Na3C6H5O7·2H2O, NH4Cl, SiC nanoparticles, and a dispersant. The composite coating is formed on the surface of a metal substrate by electroplating. After vacuum heat treatment, its Vickers hardness is 650HV~780HV, and its bonding strength is 45MPa~58MPa. This invention solves the problems of low hardness, high brittleness, and insufficient bonding strength of Ni-SiC coatings, and overcomes the defects of heavy pollution and high energy consumption associated with hard chrome plating. The resulting coating has high hardness, high bonding strength, wear resistance, and is environmentally friendly, making it suitable for surface strengthening of industrial rolls.

The invention relates to the field of blade coating, and provides a blade chromium spraying coating machine and a method thereof. The chromium plating machine comprises a rack, a driving mechanism, a blade reversing turnover mechanism, a blade fixing mechanism, a limiting mechanism, a moving mechanism and a chromium plating spray head, the driving mechanism is arranged in the center of the rack, the blade reversing turnover mechanism is arranged on the driving mechanism, the blade fixing mechanism is arranged on the blade reversing turnover mechanism, and the limiting mechanism is arranged on the blade reversing turnover mechanism. The blade reversing and overturning mechanism is arranged on the rack, the limiting mechanism is arranged on the blade reversing and overturning mechanism, the limiting mechanism is in contact fit with the blade fixing mechanism, the moving mechanism is arranged on one side of the rack, and the chromium plating nozzle is arranged on the moving mechanism.

The utility model relates to a through type position lamp and a vehicle. The through type position lamp comprises a lampshade and a lamp shell. The lampshade comprises a light-transmitting cover and a light shielding cover fully covering the outer surface of the light-transmitting cover. The outer surface of the light shield is provided with a chromium plating layer, and the front side face of the light shield is provided with a narrow-strip-shaped hollowed-out hole extending in the length direction, so that a narrow-strip-shaped light-transmitting area is formed in the hollowed-out hole of the light-transmitting cover. An inserting groove is formed in the side, facing the lampshade, of the lamp shell, the light-transmitting cover extends backwards to be provided with an inserting-connecting extending part exceeding the coverage range of the light-transmitting cover, and the inserting-connecting extending part is embedded into the inserting groove. According to the scheme, the chromium plating layer and the hollowed-out holes are arranged on the light shield, so that the lampshade integrates functions and appearance decoration, the lampshade can serve as an outer part when not turned on and serve as a functional part when turned on, and the delicacy of the whole vehicle and the competitiveness of the product are synchronously improved on the premise of meeting functional requirements.

This application relates to the field of contact terminal coating, and more specifically, to a vacuum deposition method for a gradient composite coating on contact terminals. The coating is prepared by the following steps: S1, cleaning and activation: The contact terminal blank is cleaned and activated with an activating cleaning agent to obtain blank A; S2, spray coating and pre-curing: A silane-oxygen-containing conductive liquid is sprayed onto the surface of the activated blank and pre-cured to obtain blank B; S3, PVD chromium plating: A chromium target is used to vacuum deposit a coating on the surface of blank B to form blank C; S4, shaping: Blank C is sintered to obtain a contact terminal containing a composite coating. By sequentially performing cleaning and activation, spray coating and pre-curing, PVD chromium plating, and shaping, a gradient composite layer is formed, giving the contact terminal excellent corrosion resistance and anti-detachment properties.

The utility model discloses a shock absorber working cylinder which comprises a working cylinder body, the inner surface of the working cylinder body sequentially comprises a uniform rough surface layer formed through preliminary honing, a hard chromium plating layer covering the uniform rough surface layer and a fine honing chromium plating layer located on the surface of the hard chromium plating layer, and the hardness of the fine honing chromium plating layer is larger than or equal to 800 HV. The surface roughness Ra is 0.1-0.4 micrometer, the roundness tolerance is smaller than or equal to 0.01 mm, and the straightness tolerance is smaller than or equal to 0.015 mm / 100 mm. Through the multi-layer structural design, the hardness, the surface smoothness and the geometric accuracy of the inner wall of the working cylinder are remarkably improved, friction force and abrasion are reduced, the service life is prolonged, and the durability of the working cylinder of the shock absorber is improved.

The utility model relates to the field of electroplating equipment, in particular to a chromium plating hanger for a grinding disc, which comprises a conducting rod, two clamping blocks are arranged on the conducting rod, an auxiliary anode is clamped between the two clamping blocks, and an elbow part for bearing the grinding disc to be electroplated is arranged at the bottom end of the conducting rod. The hanging tool has the advantages that the auxiliary anode is arranged, the titanium electric lead is arranged, so that current directly flows to the surface of the grinding disc to be electroplated, the current transmission path is shortened, the overall size specification of the hanging tool is reduced, the current loss is reduced, and the electroplating efficiency of the hanging tool is effectively improved under the same condition.

A structure and method for chrome plating plastic parts aimed at reducing the variation in metal thickness across all areas of the part during chrome plating. This is achieved through the use of a specially designed support device that allows for the reduction of excess metal in chrome-plated plastic parts.