CN116083891B

CN116083891B - Silver plating method and silver plating system for water drill on plastic suction sheet

Info

Publication number: CN116083891B
Application number: CN202211717852.3A
Authority: CN
Inventors: 陈海峰
Original assignee: Hubei Mingyu Crystal Jewelry Co ltd
Current assignee: Hubei Mingyu Crystal Jewelry Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2024-10-18
Anticipated expiration: 2042-12-30
Also published as: CN116083891A

Abstract

The invention discloses a silver plating method and a silver plating system for a water drill on a plastic suction sheet, and belongs to the technical field of water drill silver plating. The method comprises the following steps: soaking the plastic sucking sheet in the first cleaning liquid for 8-15 min, and cleaning the plastic sucking sheet with the second cleaning liquid on a film developing machine; suspending 50-200 plastic sucking sheets side by side on a lifting appliance and soaking in deionized water for 20-45 minutes; sequentially carrying out ultrasonic cleaning, coarsening, primary acid cleaning, alkali cleaning, secondary acid cleaning, sensitization and activation treatment on the plastic sucking sheet on the lifting appliance, and cleaning by using deionized water after each treatment procedure; soaking the plastic suction sheet on the lifting appliance in silver plating solution for silver plating treatment, wherein the silver plating time is 5-7 minutes, and the silver plating temperature is 20-30 ℃; the silver plating solution comprises silver ion solution, reducing solution and deionized water; the silver ion solution comprises silver nitrate, ammonia water and deionized water, and the reducing solution comprises sodium hydroxide, ethanol, sucrose, citric acid, potassium sodium tartrate, iodine tincture, gelatin and deionized water.

Description

Silver plating method and silver plating system for water drill on plastic suction sheet

Technical Field

The invention belongs to the technical field of water drill silver plating, and particularly relates to a silver plating method and a silver plating system of a water drill on a plastic suction piece.

Background

The water drill is an accessory with wide application, and is mainly applied to the fields of ornaments, artware, clothes, shoes and the like. The current water drill manufacturing process mainly comprises two steps: the first part is the shape manufacture (semi-finished product) of the water drill, which is mainly realized by a water drill grinding and polishing machine; the second part refers to the subsequent processing of the semi-finished product, and the process mainly comprises the working procedures of cleaning, mold suction, inspection, re-cleaning, silver plating, paint spraying and the like.

For the silver plating process of the water drill, the patent with the application number of CN201210553293.7 discloses a chemical silver plating and pretreatment process of an artificial crystal diamond pavilion, which comprises the following steps:

(1) Wetting and rough washing: immersing the artificial crystal diamond after film absorption in 0.1% -3% detergent solution for 0.5-4 hours;

(2) Placing the artificial crystal diamond treated in the step (1) into ultrasonic waves of No. 1 degreasing liquid to be cleaned for 5-30 minutes;

(3) Brushing the artificial crystal diamond treated in the step (2) to remove No. 1 degreasing liquid and dirt attached to the surface of the artificial crystal diamond, and then washing the artificial crystal diamond with clear water;

(4) Placing the artificial crystal diamond treated in the step (3) into ultrasonic waves filled with No. 2 degreasing fluid to be cleaned for 5-30 minutes;

(5) Coarsening the artificial crystal diamond treated in the step (4) in ultrasonic waves filled with coarsening liquid for 2-10 minutes, and then flushing with clear water;

(6) Putting the artificial crystal diamond treated in the step (5) into ultrasonic waves filled with pure water for cleaning for 2-10 minutes, and then flushing with the pure water;

(7) Putting the artificial crystal diamond treated in the step (6) into a sensitization tank filled with alkaline sensitization liquid for sensitization for 2-10 minutes;

(8) And (3) performing chemical silver plating on the artificial crystal diamond treated in the step (7) in a spraying or dip plating mode.

In the step (8), the spraying mode is performed by adopting a No. 1 silver plating solution and a No. 1 reducing solution, and the solution composition of the No. 1 silver plating solution comprises: silver nitrate 1%, ammonia water 2% and sodium hydroxide 0.9%; the solution composition of the No. 1 reducing solution comprises: glucose 0.9%, potassium sodium tartrate 0.2%, formaldehyde 0.1%, iodine tincture 0.1%, alcohol 2%, polyethylene glycol 0.1%, gelatin 0.1%. In the step (8), the dip plating mode is performed by adopting a No. 2 silver plating solution and a No. 2 reducing solution, wherein the solution composition of the No. 2 silver plating solution comprises: 1% of silver nitrate and 6% of ammonia water; the solution composition of the No. 2 reducing solution comprises: glucose 0.9%, potassium sodium tartrate 0.2%, iodine tincture 0.1%, alcohol 2%, polyethylene glycol 0.1%, gelatin 0.1%, and sodium hydroxide 0.9%.

The traditional silver mirror production has the advantages that because the pollution such as greasy dirt and dust carried by the plate glass is less, the pretreatment process is simpler, the production process of the water drill is complex, and rosin, shellac, lime, mechanical lubricating oil, polishing powder and other substances can be contacted in the grinding and polishing process of the semi-finished product, the pretreatment cleaning process of the water drill is much more complex than the common silver mirror pretreatment process; the mirror is generally embedded in the mirror frame, so that the requirement on the adhesive force of the silver plating layer is not very high, the water drill is used as an accessory of the ornament, some fixing methods are that the water drill is directly adhered to the silver plating protective paint by glue, and the requirement on the adhesive force of the silver plating layer of the water drill is very high in order to prevent the water drill from falling off. In addition, the water drill is very important as an ornament, such as color, transmittance, stability and the like (silver baking is needed for subsequent painting of the water drill, and spot welding fixation may be needed after leaving a factory).

Therefore, the effect of the water drill silver plating needs to consider the cleaning effect, the binding force of the water drill and the silver plating layer and the effect (including color, transmittance, stability and the like) of the silver plating layer.

The applicant found the following problems when silvering a water drill using the aforementioned method:

(1) The cleaning time of the water drill is longer, and the production efficiency is affected;

(2) Silver ion concentration of silver plating solution is high, but most silver is not plated on the surface of the water drill, but is dissolved in the solution, so that the silver ion concentration in the wastewater is high and the treatment is not good;

(3) The consumption of ammonia water is high, so that the ammonia nitrogen content of the wastewater is high, and the wastewater is not well treated;

(4) The applicant found that when the water drill is used for silver plating, the glucose is used as the reducing agent, the reduction speed is too high, so that the silver plating effect is poor, the silver layer is thinner, the combination capability of the silver layer and the water drill is weak, and the silver layer is unstable (the silver layer is easy to yellow, black and dead white);

(5) In the prior art, the single sucker piece is used as a unit for treatment, so that the treatment speed is low, and the method is not suitable for industrial production.

Disclosure of Invention

In order to solve the problems, the embodiment of the invention provides a method and a system for plating silver on a plastic suction sheet, which adopt a new cleaning flow and a silver plating pretreatment flow, save time, basically adopt machinery for treatment, and have large treatment capacity and high efficiency; the special silver plating solution (matched with the cleaning process and the silver plating pretreatment process) is adopted, and the method has the advantages of good silver plating effect, high silver utilization rate, low silver plating solution concentration, easiness in wastewater treatment and the like. The technical scheme is as follows:

on one hand, the embodiment of the invention provides a silver plating method of a water drill on a plastic suction sheet, which comprises the following steps:

(1) Cleaning: soaking the plastic sucking sheet 8 adhered with the water drill in a first cleaning solution for 8-15 minutes, and then cleaning the plastic sucking sheet by using a second cleaning solution on a film washer;

(2) Hanging piece and soaking: suspending 50-200 plastic sucking sheets 8 side by side on a lifting appliance 2 and soaking in deionized water for 20-45 minutes;

(3) Pretreatment before plating: sequentially carrying out ultrasonic cleaning, coarsening, primary acid cleaning, alkaline cleaning, secondary acid cleaning, sensitization and activation treatment on the plastic sucking sheets 8 on each lifting appliance 2, and cleaning by using deionized water after each treatment procedure;

(4) Silver plating: soaking the plastic suction sheet 8 on the lifting appliance 2 in silver plating liquid for silver plating treatment, wherein the silver plating time is 5-7 minutes, and the silver plating temperature is 20-30 ℃; the silver plating solution comprises the following components in parts by weight: 1 part of silver ion solution, 1 part of reducing solution and 200-300 parts of deionized water; the silver ion solution comprises the following components in percentage by mass: 1.0-3.5% of silver nitrate, 3-7% of ammonia water and the balance of deionized water, wherein the reducing solution comprises the following components in percentage by mass: 1.0 to 3.5 percent of sodium hydroxide, 0.4 to 0.7 percent of ethanol, 0.8 to 3.0 percent of sucrose, 0.1 to 0.3 percent of citric acid, 0.4 to 0.7 percent of potassium sodium tartrate, 0.0004 to 0.0008 percent of iodine tincture, 0.0004 to 0.0010 percent of gelatin and the balance of deionized water.

Wherein in the step (1), the composition of the first cleaning solution comprises, in parts by weight: 1-4 parts of metal cleaning agent, 1-4 parts of emulsifier, 1-4 parts of molten glass and 5000 parts of tap water; the second cleaning liquid comprises the following components in parts by weight: 1-5 parts of metal cleaning agent, 1-5 parts of emulsifier, 1-5 parts of sodium hydroxide, 1-5 parts of sodium silicate and 5000 parts of deionized water.

Wherein, in the step (3), each treatment process is carried out on a circulating lifting cleaner; the circulating lifting cleaning machine comprises a frame 3, an annular lifting structure 4 which is arranged along the front and back directions and can vertically move on the frame 3, a lifting structure 5 which is used for driving the annular lifting structure 4 to vertically move, and a plurality of water tanks 6 which are arranged right below the annular lifting structure 4 and are arranged front and back side by side, wherein a plurality of lifting pieces 7 which are used for hanging lifting pieces 2 and can longitudinally move are annularly distributed on the annular lifting structure 4, the distances between two adjacent water tanks 6 are equal and the distances between the two adjacent lifting pieces 7 are equal, and the lifting pieces 2 on each lifting piece 7 can sequentially stay above each water tank 6 and vertically move so that a plastic sucking piece 8 is immersed in a treatment liquid in the water tank 6; the water tanks 6 are sequentially divided into an ultrasonic cleaning area, a roughening area, a primary acid washing area, an alkaline washing area, a secondary acid washing area, a sensitization area and an activation area from front to back; the ultrasonic cleaning zone comprises 2-4 water tanks 6 containing third cleaning liquid and provided with an ultrasonic generator and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back, the roughening zone comprises 1 water tank 6 containing roughening liquid and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back, the primary pickling zone comprises 1 water tank 6 containing primary pickling liquid and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back, the alkaline cleaning zone comprises 1 water tank 6 containing alkaline washing liquid and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back, the secondary pickling zone comprises 1 water tank 6 containing secondary pickling liquid and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back, the sensitization zone comprises 1 water tank 6 containing sensitization liquid and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back, and the activation zone comprises 1 water tank 6 containing activation liquid and 4-8 deionized water tanks 6; the residence time of the spreader 2 at each trough 6 is 75-120s.

Wherein the third cleaning liquid comprises the following components in parts by weight: 3-6 parts of glass water and 1000 parts of deionized water; the roughening liquid comprises the following components in parts by weight: 2-5 parts of sulfuric acid, 2-5 parts of nitric acid, 1-3 parts of hydrochloric acid and 1000 parts of deionized water; the primary pickling solution comprises the following components in parts by weight: 10-20 parts of concentrated sulfuric acid and 1000 parts of deionized water; the alkali washing liquid comprises the following components in parts by weight: 7-12 parts of sodium hydroxide and 1000 parts of deionized water; the secondary pickling solution comprises the following components in parts by weight: 7-12 parts of nitric acid and 1000 parts of deionized water; the sensitization liquid comprises the following components in parts by weight: 1.0-2.5 parts of stannous chloride and 1000 parts of deionized water; the activating solution comprises the following components in parts by weight: 0.5-1.2 parts of stannous chloride, 0.05-0.3 parts of palladium chloride, 3-10 parts of HCl and 1000 parts of deionized water.

Specifically, the ultrasonic cleaning zone in the embodiment of the invention comprises 3 tanks 6 containing third cleaning liquid and provided with an ultrasonic generator and 6 tanks 6 containing deionized water, which are sequentially arranged from front to back, the roughening zone comprises 1 tank 6 containing roughening liquid and 6 tanks 6 containing deionized water, which are sequentially arranged from front to back, the primary pickling zone comprises 1 tank 6 containing primary pickling liquid and 6 tanks 6 containing deionized water, which are sequentially arranged from front to back, the alkaline cleaning zone comprises 1 tank 6 containing alkaline washing liquid and 6 tanks 6 containing deionized water, which are sequentially arranged from front to back, the secondary pickling zone comprises 1 tank 6 containing secondary pickling liquid and 6 tanks 6 containing deionized water, which are sequentially arranged from front to back, the sensitization zone comprises 1 tank 6 containing sensitization liquid and 6 tanks 6 containing deionized water, which are sequentially arranged from front to back, the activation zone comprises 1 tank 6 containing activation liquid and 6 tanks 6 containing deionized water; the volume of the treatment fluid in the water tanks 6 is 200-350 liters, 100 plastic sucking sheets 8 are hung on each lifting appliance 2, and the residence time of each lifting appliance 2 in each water tank 6 is 90s.

Wherein, in the step (4), silver plating is carried out on a silver plating machine; the silver plating machine can enable one lifting appliance 2 to swing back and forth in the horizontal direction and/or the vertical direction, and the volume of silver plating liquid in the silver plating tank is 250-350L.

Preferably, the composition of the silver ion solution in the embodiment of the invention comprises the following components in percentage by mass: 2.5% of silver nitrate, 5% of ammonia water and the balance of deionized water, wherein the reducing solution comprises the following components in percentage by mass: 2.5% of sodium hydroxide, 0.6% of ethanol, 2.0% of sucrose, 0.25% of citric acid, 0.6% of potassium sodium tartrate, 0.0005% of iodine tincture, 0.0005% of gelatin and the balance of deionized water.

On the other hand, the embodiment of the invention also provides a silver plating system of the water drill on the plastic sucking sheet, which comprises a plurality of soaking tanks, a film developing machine, a plurality of clean water tanks 1, a circulating lifting cleaner and a silver plating device which are sequentially arranged; the film developing machine comprises a circulating spraying structure and a plurality of pairs of brush roller pairs which are arranged side by side along the conveying direction of the plastic sucking sheet 8, wherein the circulating spraying structure can spray second cleaning liquid to the front surface and the back surface of the plastic sucking sheet 8, and the plastic sucking sheet 8 passes through the positions between the pairs of brush roller pairs; when the plastic sucking sheets 8 are soaked in the clear water tank 1, 50-200 plastic sucking sheets 8 are hung on one lifting appliance 2 side by side, and two ends of the lifting appliance 2 are hung on the tops of two opposite tank edges of the clear water tank 1; the circulating lifting cleaning machine comprises a frame 3, an annular lifting structure 4 which is arranged along the front and back directions and can vertically move on the frame 3, a lifting structure 5 which is used for driving the annular lifting structure 4 to vertically move, and a plurality of water tanks 6 which are arranged right below the annular lifting structure 4 and are arranged front and back side by side, wherein a plurality of lifting pieces 7 which are used for hanging lifting pieces 2 and can longitudinally move are annularly distributed on the annular lifting structure 4, the distances between two adjacent water tanks 6 are equal and the distances between the two adjacent lifting pieces 7 are equal, and the lifting pieces 2 on each lifting piece 7 can sequentially stay above each water tank 6 and vertically move so that a plastic sucking piece 8 is immersed in a treatment liquid in the water tank 6; the water tanks 6 are sequentially divided into an ultrasonic cleaning area, a roughening area, a primary acid washing area, an alkaline washing area, a secondary acid washing area, a sensitization area and an activation area from front to back; the ultrasonic cleaning zone comprises 2-4 water tanks 6 containing third cleaning liquid and provided with an ultrasonic generator and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back, the roughening zone comprises 1 water tank 6 containing roughening liquid and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back, the primary pickling zone comprises 1 water tank 6 containing primary pickling liquid and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back, the alkaline cleaning zone comprises 1 water tank 6 containing alkaline washing liquid and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back, the secondary pickling zone comprises 1 water tank 6 containing secondary pickling liquid and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back, the sensitization zone comprises 1 water tank 6 containing sensitization liquid and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back, and the activation zone comprises 1 water tank 6 containing activation liquid and 4-8 deionized water tanks 6; the residence time of the spreader 2 at each trough 6 is 75-120s.

The lifting appliance 2 in the embodiment of the invention comprises a hanging rod, a hanging plate at the lower side of the hanging rod and a plurality of hooks at the lower side of the hanging plate, wherein the hanging plate is vertically arranged, two ends of the hanging rod extend outwards relative to the corresponding side of the hanging plate, the distance between two adjacent hooks is 6-9mm, and the number of the hooks is 50-200; when the plastic sucking sheet 8 is hung on the lifting appliance 2, the top edge of the plastic sucking sheet 8 is hung on a hook and is vertical to the hanging rod; when the plastic sucking sheet 8 is soaked in the clear water tank 1, two ends of the hanging rod are hung at the tops of two opposite tank edges of the clear water tank 1; the annular lifting structure 4 comprises a lifting frame arranged in the front-back direction, two conveying chains arranged on the left side and the right side of the lifting frame in the front-back direction and a plurality of lifting pieces 7 which are arranged on the conveying chains at intervals in the front-back direction and can lift the lifting appliance 2, the lifting frame can vertically move on the frame 3, a lifting structure 5 for driving the lifting frame to vertically move is arranged between the lifting frame and the frame 3, the two conveying chains are arranged side by side and synchronously driven, the lifting pieces 7 comprise two lifting arms arranged side by side, a connecting rod between the two lifting arms and two lifting hooks arranged on the connecting rod side by side, the lifting arms are vertically arranged, and the connecting rod is arranged in the left-right direction; the upper ends of the two suspension arms are respectively and fixedly connected with the lower sides of the two conveying chains, and the lower ends of the two suspension arms are respectively and fixedly connected with the two ends of the connecting rod; when the lifting appliance 2 is lifted by the lifting piece 7, the hanging rod is arranged in the left-right direction, and the left end and the right end of the hanging rod are respectively hung on the two lifting hooks of the lifting piece 7.

Preferably, the ultrasonic cleaning zone in the embodiment of the invention comprises 3 tanks 6 containing third cleaning liquid and provided with an ultrasonic generator and 6 tanks 6 containing deionized water, which are sequentially arranged from front to back, the roughening zone comprises 1 tank 6 containing roughening liquid and 6 tanks 6 containing deionized water, which are sequentially arranged from front to back, the primary pickling zone comprises 1 tank 6 containing primary pickling liquid and 6 tanks 6 containing deionized water, which are sequentially arranged from front to back, the alkaline cleaning zone comprises 1 tank 6 containing alkaline washing liquid and 6 tanks 6 containing deionized water, which are sequentially arranged from front to back, the secondary pickling zone comprises 1 tank 6 containing secondary pickling liquid and 6 tanks 6 containing deionized water, which are sequentially arranged from front to back, the sensitization zone comprises 1 tank 6 containing sensitization liquid and 6 tanks 6 containing deionized water, which are sequentially arranged from front to back, the activation zone comprises 1 tank 6 containing activation liquid and 6 tanks 6 containing deionized water; the volume of the treatment fluid in the water tanks 6 is 200-350 liters, 100 plastic sucking sheets 8 are hung on each lifting appliance 2, and the residence time of each lifting appliance 2 in each water tank 6 is 90s; the silver plating device comprises 6 silver plating machines which are arranged in parallel front and back, one lifting appliance 2 can swing back and forth in the horizontal direction and/or the vertical direction, the volume of silver plating liquid in a silver plating groove of the silver plating machine is 250-350L, and the treatment time of the plastic sucking sheet 8 in the silver plating machines is 6min; and 6 adjacent lifting appliances 2 output by the circulating lifting cleaning machine are respectively sent into 6 silver plating machines in sequence for treatment, and the 6 silver plating machines are sequentially discharged in sequence.

The silver plating method and silver plating system for the water drill on the plastic suction sheet provided by the invention have the following advantages:

(1) The cleaning is carried out by adopting a soaking and machine cleaning mode, and the special cleaning agent is combined, so that the cleaning time is reduced while the labor is saved, and the cleaning effect is good.

(2) During silver plating pretreatment and silver plating, 50-200 plastic sucking sheets on one lifting appliance are used as a treatment unit for treatment, so that the treatment is convenient and the treatment capacity is large.

(3) The water drill on the plastic sucking sheet is pretreated by adopting the circulating lifting cleaner, so that the treatment effect is good, the automation degree is high, the treatment speed is high, and the control is convenient.

(4) The novel silver plating solution takes sucrose as a reducing agent and adopts a special formula, and has the advantages of small silver nitrate consumption, moderate reaction speed, increased silver plating layer thickness, increased silver layer adsorption force, increased silver layer permeability, bright silver layer, increased silver layer stability, increased silver layer oxidation resistance and the like.

(5) The silver concentration in the silver plating solution is low, the use amount of ammonia water is small, the cost can be reduced, and the treatment difficulty of wastewater is reduced; compared with the conventional process, the method has the advantages that the concentration of silver ions in the silver plating solution is low, and after silver plating, the concentration of silver ions in the silver plating solution is lower than that in the conventional process, namely, the utilization rate of silver ions is higher.

(6) And the assembly line production is adopted, the working procedures are smoothly connected, the speed is matched, and the production efficiency can be improved.

Drawings

FIG. 1 is a schematic view of a circulation lift washer in accordance with an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the combination of the cleaning tank, the hanger and the plastic suction sheet;

Fig. 3 is a flowchart of a method for plating silver on a blister pack with a water drill according to an embodiment of the present invention;

FIG. 4 is a detailed schematic block diagram of a method for plating silver on a blister pack with a water drill according to an embodiment of the present invention;

FIG. 5 is a photograph of the silver plated blister sheet;

fig. 6 is a photograph of a blister sheet when silver baked.

In the figure: 1 a clean water tank, 2a lifting appliance, 3a frame, 4 an annular lifting structure, 5a lifting structure, 6 a water tank, 7 lifting pieces and 8 plastic sucking sheets.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent.

Example 1

Embodiment 1 provides a silver plating system of a water drill on a plastic suction sheet, which comprises a plurality of soaking tanks, a film developing machine, a plurality of water cleaning tanks 1, a circulating lifting cleaner, a silver plating device and the like which are sequentially arranged. The soaking tank is filled with a first cleaning liquid. The film developing machine comprises a circulating spraying structure (second cleaning liquid circulating spraying) and a plurality of pairs of brush roller pairs which are arranged side by side along the conveying direction of the plastic sucking sheets 8, wherein the number of the brush roller pairs is more than 80 pairs. Specifically, a plurality of developing machines produced by the mechanical company of the Yiwujin of China can be connected in series, and the circulating spraying structure can spray the second cleaning liquid to the front surface and the back surface of the plastic sucking sheet 8, so that the plastic sucking sheet 8 passes through the gap between the brush roller pairs.

When the plastic sucking sheets 8 are soaked in the clear water tank 1 (the deionized water is contained in the plastic sucking sheets), 50-200 plastic sucking sheets 8 are hung on one lifting appliance 2 side by side, and two ends of the lifting appliance 2 are hung on the tops of two opposite tank edges of the clear water tank 1.

Referring to fig. 1, the circulation lift washer includes a frame 3, an annular lifting structure 4 disposed in a front-rear direction and capable of vertically moving on the frame 3, a lifting structure 5 for driving the annular lifting structure 4 to vertically move, and a plurality of water tanks 6 disposed directly under the annular lifting structure 4 and side by side front-rear, etc., and may be referred to the description (no rotation driving structure and drum) of application No. CN 201920190983.8. The annular lifting structure 4 is provided with a plurality of lifting pieces 7 which are used for hanging the lifting appliance 2 and can move forwards and backwards, the distance between two adjacent water tanks 6 is equal to the distance between the two adjacent lifting pieces 7, and the lifting appliance 2 on each lifting piece 7 can stay above each water tank 6 in sequence and move vertically so that the plastic suction sheet 8 is immersed in the treatment liquid in the water tank 6.

Wherein, the water tanks 6 are sequentially divided into an ultrasonic cleaning area, a roughening area, a primary acid washing area, an alkaline washing area, a secondary acid washing area, a sensitization area and an activation area from front to back. The ultrasonic cleaning area comprises 2-4 water tanks 6 which are sequentially arranged from front to back and contain third cleaning liquid and are provided with ultrasonic generators, and 4-8 water tanks 6 which are used for containing deionized water. The roughening zone comprises 1 water tank 6 containing roughening liquid and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back. The primary pickling area comprises 1 water tank 6 containing primary pickling solution and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back. The alkaline washing zone comprises 1 water tank 6 containing alkaline washing liquid and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back. The secondary pickling area comprises 1 water tank 6 containing secondary pickling solution and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back. The sensitization zone comprises 1 water tank 6 containing sensitization liquid and 4-8 water tanks 6 containing deionized water which are sequentially arranged from front to back. The activation zone comprises 1 water tank 6 containing activation liquid and 4-8 water tanks 6 containing deionized water which are sequentially arranged from front to back. The residence time of the spreader 2 at each trough 6 is 75-120s.

Referring to fig. 2, the lifting appliance 2 in the embodiment of the invention includes a hanging rod (specifically, a round rod), a hanging plate (specifically, formed by two rectangular stainless steel plates side by side) at the lower side of the hanging rod, and a plurality of hooks arranged side by side at the lower side of the hanging plate, wherein the hanging plate is vertically arranged, two ends of the hanging rod extend outwards relative to the corresponding side of the hanging plate, the distance between two adjacent hooks is 6-9mm, and the number of hooks is 50-200. When the plastic sucking sheet 8 is hung on the lifting appliance 2, the top edge of the plastic sucking sheet 8 is hung on a hook and is perpendicular to the hanging rod. When the plastic sucking sheet 8 is soaked in the clear water tank 1, the two ends of the hanging rod are hung at the tops of the two opposite tank edges of the clear water tank 1. When the lifting appliance 2 is lifted by the lifting element 7, the hanging rod is arranged along the left and right directions, and the left and right ends of the hanging rod are respectively hung on the two lifting hooks of the lifting element 7.

The annular lifting structure 4 comprises a lifting frame arranged in the front-back direction, two conveying chains arranged on the left side and the right side of the lifting frame in the front-back direction, a plurality of lifting pieces 7 (the quantity of which is equal to or slightly more than 2 times of the quantity of the water tanks 6) which are arranged on the conveying chains at intervals in the front-back direction and can lift the lifting device 2, and the lifting frame can vertically move on the frame 3, a lifting structure 5 for driving the lifting frame to vertically move is arranged between the lifting frame and the frame 3, and the two conveying chains are arranged side by side and synchronously driven. The hoisting piece 7 comprises two suspension arms which are arranged side by side left and right, a connecting rod between the two suspension arms, two lifting hooks (positioned on the inner sides of the suspension arms on the corresponding sides) which are arranged side by side left and right, and the like, wherein the suspension arms are vertically arranged, and the connecting rod is arranged along the left and right direction; the upper ends of the two suspension arms (taking the lifting piece 7 at the lower side of the annular lifting structure 4 as an example) are respectively and fixedly connected with the lower sides of the two conveying chains, and the lower ends of the two suspension arms are respectively and fixedly connected with the two ends of the connecting rod.

Preferably, the ultrasonic cleaning area in the embodiment of the invention comprises 3 tanks 6 containing third cleaning liquid and provided with an ultrasonic generator and 6 tanks 6 containing deionized water, which are sequentially arranged from front to back. The roughening zone comprises 1 water tank 6 containing roughening liquid and 6 water tanks 6 containing deionized water, which are sequentially arranged from front to back. The primary pickling area comprises 1 water tank 6 containing primary pickling solution and 6 water tanks 6 containing deionized water, which are sequentially arranged from front to back. The alkaline washing zone comprises 1 water tank 6 containing alkaline washing liquid and 6 water tanks 6 containing deionized water, which are sequentially arranged from front to back. The secondary pickling area comprises 1 water tank 6 containing secondary pickling solution and 6 water tanks 6 containing deionized water, which are sequentially arranged from front to back. The sensitization zone comprises 1 water tank 6 containing sensitization liquid and 6 water tanks 6 containing deionized water which are sequentially arranged from front to back. The activation zone comprises 1 water tank 6 containing activation liquid and 6 water tanks 6 containing deionized water which are sequentially arranged from front to back. The volume of the treatment fluid in the water tanks 6 is 200-350 liters, 100 plastic sucking sheets 8 are hung on each lifting appliance 2, and the residence time of the lifting appliance 2 at each water tank 6 is 90s. The silver plating apparatus includes 6 silver plating machines arranged side by side in tandem, see the description of the patents CN201620254710.1 and CN 201720893170.6. The silver plating machine can enable one lifting appliance 2 to swing back and forth in the horizontal direction and/or the vertical direction, the volume of silver plating liquid in the silver plating groove is 250-350L, and the treatment time of the plastic sucking sheet 8 in the silver plating machine is 6min. The adjacent 6 lifting appliances 2 output by the circulating lifting cleaning machine are respectively sent into 6 silver plating machines in sequence for treatment, and the 6 silver plating machines are sequentially discharged in sequence. The structure ensures that the processing speed of the circulating lifting cleaner and the silver plating device is adapted, and the working efficiency is improved.

Example 2

Referring to fig. 3 and 4, example 2 provides a method for plating silver on a blister sheet with a water drill, comprising the steps of:

(1) Cleaning: the plastic sucking sheet 8 adhered with the water drill is soaked in the first cleaning solution for 8-15 minutes, so that oil molecules, metal ions, polishing powder and the like on the plastic sucking sheet can be well and fully dissolved, and the effect is more obvious than that of a method using only detergent in the traditional process. And then the second cleaning liquid is used for cleaning on the film washer, so that the oxidized substances, polishing residues and oil molecules on the surface of the water drill can be better cleaned, and the clean and bright water drill can be obtained after cleaning.

(2) Hanging piece and soaking: 50-200 plastic sucking sheets 8 are hung on a lifting appliance 2 side by side and soaked in deionized water for 20-45 minutes. Specifically, the hanger 2 is made of stainless steel. The hanger 2 is used for fixing the plastic sucking sheets 8, so that the plastic sucking sheets 8 are distributed more uniformly and have moderate intervals; silver is more beneficial to deposit on the surface of the water drill.

(3) Pretreatment before plating: sequentially carrying out ultrasonic cleaning, roughening, primary acid cleaning, alkaline cleaning, secondary acid cleaning, sensitization, activation and the like on the plastic sucking sheets 8 on each lifting appliance 2, and cleaning by using deionized water after each treatment process; this step is realized through circulation lift cleaning machine, need not artifical the participation (only need hang hoist 2 at hoist and mount piece 7 or take off from hoist and mount piece 7), and degree of automation is high, and the effect is stable.

(4) Silver plating: the plastic suction sheet 8 on the lifting appliance 2 is soaked in silver plating liquid for silver plating treatment, the silver plating time is 5-7 minutes, and the silver plating temperature is 20-30 ℃. Wherein, the silver plating solution comprises the following components in parts by weight: 1 part of silver ion solution, 1 part of reducing solution and 200-300 parts of deionized water. Wherein the composition of the silver ion solution comprises the following components in percentage by mass: 1.0 to 3.5 percent of silver nitrate, 3 to 7 percent of ammonia water (the commercial concentration can be 25 to 28 weight percent specifically) and the balance of deionized water. Wherein the composition of the reducing solution comprises the following components in percentage by mass: 1.0 to 3.5 percent of sodium hydroxide, 0.4 to 0.7 percent of ethanol, 0.8 to 3.0 percent of sucrose, 0.1 to 0.3 percent of citric acid, 0.4 to 0.7 percent of potassium sodium tartrate, 0.0004 to 0.0008 percent of iodine tincture, 0.0004 to 0.0010 percent of gelatin and the balance of deionized water. This patent uses sucrose as the reductant, other raw materials adaptability adjustment, and silver ion (plating the water brill of same quantity, silver's quantity reduces to below half of conventional art) utilization efficiency is higher, deposition effect is better, and the quantity of ammonia (plating the water brill of same quantity, the quantity of ammonia reduces to below 1/3 of conventional art) use amount is less.

Wherein, in the step (1), the composition of the first cleaning liquid comprises, in parts by weight: 1-4 parts of metal cleaning agent, 1-4 parts of emulsifier, 1-4 parts of glass water and 5000 parts of tap water. The second cleaning liquid comprises the following components in parts by weight: 1-5 parts of metal cleaning agent, 1-5 parts of emulsifier, 1-5 parts of sodium hydroxide, 1-5 parts of sodium silicate and 5000 parts of deionized water.

In the step (3), each treatment step is performed on a circulating lift cleaner. The circulating lifting cleaning machine comprises a frame 3, an annular lifting structure 4 which is arranged along the front and back directions and can vertically move on the frame 3, a lifting structure 5 for driving the annular lifting structure 4 to vertically move, a plurality of water tanks 6 which are arranged below the annular lifting structure 4 and front and back side by side, and the like. The water tank 6 is made of plastic, and other structures are made of stainless steel as much as possible. The annular lifting structure 4 is provided with a plurality of lifting pieces 7 which are used for hanging the lifting appliance 2 and can move forwards and backwards, the distance between two adjacent water tanks 6 is equal to the distance between the two adjacent lifting pieces 7, and the lifting appliance 2 on each lifting piece 7 can stay above each water tank 6 in sequence and move vertically so that the plastic suction sheet 8 is immersed in the treatment liquid in the water tank 6. The water tanks 6 are sequentially divided into an ultrasonic cleaning area, a roughening area, a primary acid washing area, an alkaline washing area, a secondary acid washing area, a sensitization area and an activation area from front to back.

The ultrasonic cleaning area comprises 2-4 water tanks 6 which are sequentially arranged from front to back and contain third cleaning liquid and are provided with ultrasonic generators, and 4-8 water tanks 6 which are used for containing deionized water. The roughening zone comprises 1 water tank 6 containing roughening liquid and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back. The primary pickling area comprises 1 water tank 6 containing primary pickling solution and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back. The alkaline washing zone comprises 1 water tank 6 containing alkaline washing liquid and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back. The secondary pickling area comprises 1 water tank 6 containing secondary pickling solution and 4-8 water tanks 6 containing deionized water, which are sequentially arranged from front to back. The sensitization zone comprises 1 water tank 6 containing sensitization liquid and 4-8 water tanks 6 containing deionized water which are sequentially arranged from front to back. The activation zone comprises 1 water tank 6 containing activation liquid and 4-8 water tanks 6 containing deionized water which are sequentially arranged from front to back. The residence time of the spreader 2 at each trough 6 is 75-120s.

Wherein the third cleaning liquid comprises the following components in parts by weight: 3-6 parts of glass water and 1000 parts of deionized water. The roughening liquid comprises the following components in parts by weight: 2-5 parts of sulfuric acid, 2-5 parts of nitric acid, 1-3 parts of hydrochloric acid and 1000 parts of deionized water. The primary pickling solution comprises the following components in parts by weight: 10-20 parts of concentrated sulfuric acid (with the concentration of 98 wt%) and 1000 parts of deionized water. The alkali washing liquid comprises the following components in parts by weight: 7-12 parts of sodium hydroxide and 1000 parts of deionized water. The secondary pickling solution comprises the following components in parts by weight: 7-12 parts of nitric acid and 1000 parts of deionized water. The sensitization liquid comprises the following components in parts by weight: 1.0-2.5 parts of stannous chloride and 1000 parts of deionized water. The composition of the activating solution comprises the following components in parts by weight: 0.5-1.2 parts of stannous chloride, 0.05-0.3 parts of palladium chloride, 3-10 parts of HCl and 1000 parts of deionized water.

Specifically, the ultrasonic cleaning area in the embodiment of the invention comprises 3 water tanks 6 which are sequentially arranged from front to back and contain third cleaning liquid and are provided with ultrasonic generators, and 6 water tanks 6 which are filled with deionized water. The roughening zone comprises 1 water tank 6 containing roughening liquid and 6 water tanks 6 containing deionized water, which are sequentially arranged from front to back. The primary pickling area comprises 1 water tank 6 containing primary pickling solution and 6 water tanks 6 containing deionized water, which are sequentially arranged from front to back. The alkaline washing zone comprises 1 water tank 6 containing alkaline washing liquid and 6 water tanks 6 containing deionized water, which are sequentially arranged from front to back. The secondary pickling area comprises 1 water tank 6 containing secondary pickling solution and 6 water tanks 6 containing deionized water, which are sequentially arranged from front to back. The sensitization zone comprises 1 water tank 6 containing sensitization liquid and 6 water tanks 6 containing deionized water which are sequentially arranged from front to back. The activation zone comprises 1 water tank 6 containing activation liquid and 6 water tanks 6 containing deionized water which are sequentially arranged from front to back. The volume of the treatment fluid in the water tanks 6 is 200-350 liters, 100 plastic sucking sheets 8 are hung on each lifting appliance 2, and the residence time of the lifting appliance 2 at each water tank 6 is 90s.

Wherein, in the step (4), silver plating is carried out on a silver plating machine. The silver plating machine can enable one lifting appliance 2 to swing back and forth in the horizontal direction and/or the vertical direction, and the volume of silver plating liquid in the silver plating tank is 250-350L. The silver plating machine can see the description of the patents CN201620254710.1 and CN201720893170.6, the two ends of the hanging rod of the lifting appliance 2 are respectively hung on the two hanging box rods, and the plastic sucking sheet 8 is immersed in silver plating liquid in a silver plating groove. The silver plating solution in the silver plating tank is used as a disposable treatment solution and is only used for treating the plastic sucking sheets 8 hung on one lifting appliance 2; and (5) replacing after treatment.

Preferably, the composition of the silver ion solution in the embodiment of the invention comprises the following components in percentage by mass: silver nitrate 2.5%, ammonia water 5%, and deionized water in balance. The composition of the reducing solution comprises the following components in percentage by mass: 2.5% of sodium hydroxide, 0.6% of ethanol, 2.0% of sucrose, 0.25% of citric acid, 0.6% of potassium sodium tartrate, 0.0005% of iodine tincture, 0.0005% of gelatin and the balance of deionized water.

And verifying the water drill treated by the method:

taking a plastic sucking sheet after silver plating and before silver baking, as shown in fig. 5 and 6; it can be seen that: the silver layer is uniform, shiny, good in transmittance, free of dead white, yellowing and blackening.

The surface of the water drill is treated by hand rubbing and strong adhesive tape respectively, and no silver layer is removed. In the prior art, a part of the water drills can be used for enabling the paint layer to fall off only by rubbing the water drills with hands, and most of the water drills can be used for enabling the silver layer to fall off by adopting a strong adhesive tape to adhere the silver layer. The silver plating method of the invention is adopted, so that the combination of the silver layer and the water drill is tighter.

Taking a plurality of water drills after paint spraying, and adopting spot welding (the temperature is about 400 ℃) to treat the surfaces of the water drills; with the water drill treated by the method, only less than 1% of the surface of the water drill is obviously blackened; whereas with prior art plated silver layers, over 7% of the surface of the bur became significantly blackened. The silver layer has better stability and oxidation resistance by adopting the silver plating method.

The "first", "second" and "third" in this embodiment are only used for distinguishing, and have no other special meaning.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

1. The method for plating silver on the water drill on the plastic sucking sheet is characterized by comprising the following steps:

(1) Cleaning: soaking the plastic sucking sheet (8) adhered with the water drill in a first cleaning solution for 8-15 minutes, and then cleaning the plastic sucking sheet by using a second cleaning solution on a film developing machine;

(2) Hanging piece and soaking: suspending 50-200 plastic sucking sheets (8) side by side on a lifting appliance (2) and soaking in deionized water for 20-45 minutes;

(3) Pretreatment before plating: sequentially carrying out ultrasonic cleaning, coarsening, primary acid cleaning, alkali cleaning, secondary acid cleaning, sensitization and activation treatment on the plastic sucking sheet (8) on each lifting appliance (2), and cleaning by using deionized water after each treatment procedure;

(4) Silver plating: soaking a plastic suction sheet (8) on a lifting appliance (2) in silver plating liquid for silver plating treatment, wherein the silver plating time is 5-7 minutes, and the silver plating temperature is 20-30 ℃; the silver plating solution comprises the following components in parts by weight: 1 part of silver ion solution, 1 part of reducing solution and 200-300 parts of deionized water; the silver ion solution comprises the following components in percentage by mass: 1.0-3.5% of silver nitrate, 3-7% of ammonia water and the balance of deionized water, wherein the reducing solution comprises the following components in percentage by mass: 1.0 to 3.5 percent of sodium hydroxide, 0.4 to 0.7 percent of ethanol, 0.8 to 3.0 percent of sucrose, 0.1 to 0.3 percent of citric acid, 0.4 to 0.7 percent of potassium sodium tartrate, 0.0004 to 0.0008 percent of iodine tincture, 0.0004 to 0.0010 percent of gelatin and the balance of deionized water;

In the step (1), the first cleaning solution comprises the following components in parts by weight: 1-4 parts of metal cleaning agent, 1-4 parts of emulsifier, 1-4 parts of molten glass and 5000 parts of tap water; the second cleaning liquid comprises the following components in parts by weight: 1-5 parts of metal cleaning agent, 1-5 parts of emulsifier, 1-5 parts of sodium hydroxide, 1-5 parts of sodium silicate and 5000 parts of deionized water;

In the step (3), each treatment process is carried out on a circulating lifting cleaner; the circulating lifting cleaning machine comprises a frame (3), an annular lifting structure (4) which is arranged along the front and back directions and can vertically move on the frame (3), a lifting structure (5) which is used for driving the annular lifting structure (4) to vertically move, and a plurality of water tanks (6) which are arranged below the annular lifting structure (4) and are arranged side by side front and back, wherein a plurality of lifting pieces (7) which are used for hanging lifting pieces (2) and can move forwards and backwards are annularly distributed on the annular lifting structure (4), the distance between two adjacent water tanks (6) is equal and the distance between the two adjacent lifting pieces (7) is equal, and the lifting pieces (2) on each lifting piece (7) can sequentially stay above each water tank (6) and vertically move so as to enable a plastic sucking piece (8) to be immersed in treatment liquid in the water tanks (6);

The water tanks (6) are sequentially divided into an ultrasonic cleaning area, a roughening area, a primary acid washing area, an alkaline washing area, a secondary acid washing area, a sensitization area and an activation area from front to back; the ultrasonic cleaning zone comprises 2-4 tanks (6) containing third cleaning liquid and provided with an ultrasonic generator and 4-8 tanks (6) containing deionized water, which are sequentially arranged from front to back, the roughening zone comprises 1 tank (6) containing roughening liquid and 4-8 tanks (6) containing deionized water, which are sequentially arranged from front to back, the primary pickling zone comprises 1 tank (6) containing primary pickling liquid and 4-8 tanks (6) containing deionized water, which are sequentially arranged from front to back, the alkaline washing zone comprises 1 tank (6) containing alkaline pickling liquid and 4-8 tanks (6) containing deionized water, which are sequentially arranged from front to back, the secondary pickling zone comprises 1 tank (6) containing secondary pickling liquid and 4-8 tanks (6) containing deionized water, which are sequentially arranged from front to back, the sensitization zone comprises 1 tank (6) containing sensitization liquid and 4-8 tanks (6) containing deionized water, which are sequentially arranged from front to back, and the alkaline washing zone comprises 1 tank (6) containing activation water and 4-8 tanks (6) containing deionized water, which are sequentially arranged from front to back; the residence time of the lifting appliance (2) at each water tank (6) is 75-120s;

The third cleaning liquid comprises the following components in parts by weight: 3-6 parts of glass water and 1000 parts of deionized water; the roughening liquid comprises the following components in parts by weight: 2-5 parts of sulfuric acid, 2-5 parts of nitric acid, 1-3 parts of hydrochloric acid and 1000 parts of deionized water; the primary pickling solution comprises the following components in parts by weight: 10-20 parts of concentrated sulfuric acid and 1000 parts of deionized water; the alkali washing liquid comprises the following components in parts by weight: 7-12 parts of sodium hydroxide and 1000 parts of deionized water; the secondary pickling solution comprises the following components in parts by weight: 7-12 parts of nitric acid and 1000 parts of deionized water; the sensitization liquid comprises the following components in parts by weight: 1.0-2.5 parts of stannous chloride and 1000 parts of deionized water; the activating solution comprises the following components in parts by weight: 0.5-1.2 parts of stannous chloride, 0.05-0.3 parts of palladium chloride, 3-10 parts of HCl and 1000 parts of deionized water.

2. The method for plating silver on a plastic suction sheet according to claim 1, wherein the ultrasonic cleaning zone comprises 3 tanks (6) containing third cleaning liquid and provided with an ultrasonic generator and 6 tanks (6) containing deionized water, which are sequentially arranged from front to back, the roughening zone comprises 1 tank (6) containing roughening liquid and 6 tanks (6) containing deionized water, which are sequentially arranged from front to back, the primary pickling zone comprises 1 tank (6) containing primary pickling liquid and 6 tanks (6) containing deionized water, which are sequentially arranged from front to back, the alkaline washing zone comprises 1 tank (6) containing alkaline washing liquid and 6 tanks (6) containing deionized water, which are sequentially arranged from front to back, the secondary pickling zone comprises 1 tank (6) containing secondary pickling liquid and 6 tanks (6) containing deionized water, which are sequentially arranged from front to back, the sensitization zone comprises 1 tank (6) containing sensitization liquid and 6) containing deionized water, which are sequentially arranged from front to back, and the activation zone comprises 1 tank (6) containing deionized water and 6) containing activation liquid; the volume of the treatment fluid in the water tanks (6) is 200-350 liters, 100 plastic sucking sheets (8) are hung on each lifting appliance (2), and the residence time of each lifting appliance (2) at each water tank (6) is 90s.

3. The method of plating silver on a blister pack according to claim 1, wherein in step (4), silver plating is performed on a silver plating machine; the silver plating machine can enable a lifting appliance (2) to swing back and forth in the horizontal direction and/or the vertical direction, and the volume of silver plating liquid in the silver plating tank is 250-350L.

4. The method of silver plating on a blister piece using a water drill according to claim 1, wherein the composition of the silver ion solution comprises, in mass percent: 2.5% of silver nitrate, 5% of ammonia water and the balance of deionized water, wherein the reducing solution comprises the following components in percentage by mass: 2.5% of sodium hydroxide, 0.6% of ethanol, 2.0% of sucrose, 0.25% of citric acid, 0.6% of potassium sodium tartrate, 0.0005% of iodine tincture, 0.0005% of gelatin and the balance of deionized water.

5. The system for plating silver on the water drill on the plastic suction sheet is characterized by comprising a plurality of soaking tanks, a film developing machine, a plurality of clean water tanks (1), a circulating lifting cleaner and a silver plating device which are sequentially arranged;

the film developing machine comprises a circulating spraying structure and a plurality of pairs of brush roller pairs which are arranged side by side along the conveying direction of the plastic sucking sheet (8), wherein the circulating spraying structure can spray second cleaning liquid to the front surface and the back surface of the plastic sucking sheet (8), and the plastic sucking sheet (8) passes through the positions between the brush roller pairs; when the plastic sucking sheets (8) are soaked in the clear water tank (1), 50-200 plastic sucking sheets (8) are hung on a lifting appliance (2) side by side, and two ends of the lifting appliance (2) are hung on the tops of two opposite tank edges of the clear water tank (1);

The circulating lifting cleaning machine comprises a frame (3), an annular lifting structure (4) which is arranged along the front and back directions and can vertically move on the frame (3), a lifting structure (5) which is used for driving the annular lifting structure (4) to vertically move, and a plurality of water tanks (6) which are arranged below the annular lifting structure (4) and are arranged side by side front and back, wherein a plurality of lifting pieces (7) which are used for hanging lifting pieces (2) and can move forwards and backwards are annularly distributed on the annular lifting structure (4), the distance between two adjacent water tanks (6) is equal and the distance between the two adjacent lifting pieces (7) is equal, and the lifting pieces (2) on each lifting piece (7) can sequentially stay above each water tank (6) and vertically move so as to enable a plastic sucking piece (8) to be immersed in treatment liquid in the water tanks (6);

The lifting appliance (2) comprises a hanging rod, a hanging plate at the lower side of the hanging rod and a plurality of hooks at the lower side of the hanging plate, wherein the hanging plate is vertically arranged, two ends of the hanging rod extend outwards relative to the corresponding side of the hanging plate, the distance between two adjacent hooks is 6-9mm, and the number of the hooks is 50-200; when the plastic sucking sheet (8) is hung on the lifting appliance (2), the top edge of the plastic sucking sheet (8) is hung on a hook and is vertical to the hanging rod;

When the plastic sucking sheet (8) is soaked in the clear water tank (1), two ends of the hanging rod are hung at the tops of two opposite tank edges of the clear water tank (1).

6. The silver plating system according to claim 5, wherein the annular lifting structure (4) comprises a lifting frame arranged along the front-back direction, two conveying chains arranged on the left side and the right side of the lifting frame along the front-back direction, and a plurality of lifting pieces (7) which are arranged on the conveying chains at intervals front and back and can lift the lifting appliance (2), the lifting frame can vertically move on the frame (3), a lifting structure (5) for driving the lifting frame to vertically move is arranged between the lifting frame and the frame (3), the two conveying chains are arranged side by side and synchronously driven, the lifting pieces (7) comprise two lifting arms arranged side by side, a connecting rod between the two lifting arms and two lifting hooks arranged on the connecting rod side by side, the lifting arms are vertically arranged, and the connecting rod is arranged along the left-right direction; the upper ends of the two suspension arms are respectively and fixedly connected with the lower sides of the two conveying chains, and the lower ends of the two suspension arms are respectively and fixedly connected with the two ends of the connecting rod; when the lifting device (2) is lifted by the lifting piece (7), the hanging rod is arranged along the left and right directions, and the left and right ends of the hanging rod are respectively hung on the two lifting hooks of the lifting piece (7).

7. The silver plating system according to claim 5, wherein the ultrasonic cleaning zone comprises 3 tanks (6) containing a third cleaning solution and provided with an ultrasonic generator and 6 tanks (6) containing deionized water, which are sequentially arranged from front to back, the roughening zone comprises 1 tank (6) containing a roughening solution and 6 tanks (6) containing deionized water, which are sequentially arranged from front to back, the primary pickling zone comprises 1 tank (6) containing a primary pickling solution and 6 tanks (6) containing deionized water, which are sequentially arranged from front to back, the alkaline cleaning zone comprises 1 tank (6) containing an alkaline cleaning solution and 6 tanks (6) containing deionized water, which are sequentially arranged from front to back, the secondary pickling zone comprises 1 tank (6) containing a secondary pickling solution and 6 tanks (6) containing deionized water, which are sequentially arranged from front to back, the sensitization zone comprises 1 tank (6) containing a sensitization solution and 6 tanks (6) containing deionized water, which are sequentially arranged from front to back, and the sensitization zone comprises 1 tank (6) containing an activation solution and 6 tanks (6) containing deionized water, which are sequentially arranged from front to back; the volume of the treatment fluid in the water tanks (6) is 200-350 liters, 100 plastic sucking sheets (8) are hung on each lifting appliance (2), and the residence time of each lifting appliance (2) at each water tank (6) is 90s; the silver plating device comprises 6 silver plating machines which are arranged in parallel front and back, one lifting appliance (2) can swing back and forth in the horizontal direction and/or the vertical direction, the volume of silver plating liquid in a silver plating groove of the silver plating machine is 250-350L, and the processing time of the plastic sucking sheet (8) in the silver plating machines is 6min; and 6 adjacent lifting appliances (2) output by the circulating lifting cleaning machine are respectively sent into 6 silver plating machines in sequence for treatment, and the 6 silver plating machines are sequentially discharged in sequence.