CN108774739A - High rigidity high life chrome-plated mould and its mould making process - Google Patents
High rigidity high life chrome-plated mould and its mould making process Download PDFInfo
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- CN108774739A CN108774739A CN201810925958.XA CN201810925958A CN108774739A CN 108774739 A CN108774739 A CN 108774739A CN 201810925958 A CN201810925958 A CN 201810925958A CN 108774739 A CN108774739 A CN 108774739A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/10—Electroplating with more than one layer of the same or of different metals
- C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
- C25D5/14—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium two or more layers being of nickel or chromium, e.g. duplex or triplex layers
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/38—Chromatising
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
- C25D3/08—Deposition of black chromium, e.g. hexavalent chromium, CrVI
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
Abstract
A kind of high rigidity high life chrome-plated mould and its mould making process of the present invention, it includes spindle nose, base tube, bottom nickel, layers of copper, nickel layer, layers of chrome, passivation layer and glue layer, step 1：Preparation：Annular knurl is carried out after mold polish, then high temperature deoils；Step 2：Copper facing：1, it cleans, 2, plating bottom nickle, 3, copper facing, 4, multiple plating cleaning；Step 3：Chromium plating：1, cleaning treatment, 2, electric shock cleaning, 3, plating bottom nickle, 4, chromium plating, step 4：Passivation, step 5：Gluing.The present invention is used in die surface chrome-plated process, so that the wearability and anti-destructive of mold greatly improve, to further substantially increase the service life of mold, by long-term use, cost can not only be greatlyd save, moreover it is possible to improve the physical property and finish of plating piece.
Description
Technical field
The present invention relates to net technical field of mold processed more particularly to a kind of high rigidity high life chrome-plated mould and its moulders
Skill.
Background technology
It is all plating nickel on surface to make the mold of nickel screen now, but since the case hardness of nickel coating is only in 120HV-
180HV easily makes plating nickel on surface layer be damaged for various reasons in network process processed, even only one of small stroke
The nickel layer on warp that trace can also make net mold processed small fall off and can not normal net processed, to leverage the use of mold
Service life also increases production cost.
And since the case hardness of chrome layer is up to 500HV-1800HV, if mould can be made using die surface chrome-plated process
Have case hardness and increase by ten times so that the wearability and anti-destructive of mold greatly improve, so as to greatly improve making for mold
Use the service life.
But many trials replace the those skilled in the art of nickel plating with chromium plating, can encounter various problems, such as chromium plating rear mold table
Face is smooth, the problems such as can not carrying out glue process, so chrome-plated mould has not been used in the industry.
Invention content
The purpose of the present invention is to overcome the above shortcomings and to provide a kind of high rigidity high life chrome-plated mould and its moulders
Skill, it is cost-effective, improve the percent opening of nickel screen.
The object of the present invention is achieved like this：
A kind of high rigidity high life chrome-plated mould, it includes spindle nose, base tube, bottom nickel, layers of copper, nickel layer, layers of chrome, passivation layer and glue
Layer.
A kind of high rigidity high life chrome-plated mould, the spindle nose have two pieces, are installed on the both ends of base tube respectively；Bottom nickel is compound
In base tube outer surface, layers of copper is compound in bottom nickel outer surface, and nickel layer is compound in 4 outer surface of layers of copper, and layers of chrome is compound in nickel layer outer surface,
Passivation layer is compound in layers of chrome outer surface, and glue layer is compound in passivation layer outer surface.
A kind of mould making process of high rigidity high life chrome-plated mould, it includes the following steps：
Step 1：Preparation：Annular knurl is carried out after mold polish, then high temperature deoils；
Step 2：Copper facing：Then mold is put into copper plating groove and carries out copper facing by plating bottom nickle after die surface cleaning, finally multiple plating is clear
It washes；
Step 3：Chromium plating：First cleaning treatment, then electric shock cleaning, then plating bottom nickle, then carries out chromium plating, chrome-plating bath tank liquor temperature
Degree reaches and is maintained at 50-60 degree, and tank liquor is evacuated to work nest by mold into preceding from heating tank, and mold cannot start after hanging in
Electric current, allows mold prerotation 1 minute in chromium plating liquid, electric current is raised to 4500A or more in 5-15 seconds after 1 minute, when every sun
When pole generates bubble with chromium plating liquid contact position, electric current can be adjusted to 1900-2000A after waiting for 2-3 minutes and keep current stabilization
Run 2000 numbers of words；
Operation expires after stopping, closing chrome liquor circulating pump, and chrome liquor to be plated is washed down after lowering into secondary slot with water, hangs in deactivation slot；
Step 4：Passivation：
For passivating solution temperature between 45-50 degree, mold enters preceding closing circulating pump in deactivation slot, and mold dallies 1 minute after entering,
Electricity is risen after 1 minute, current value 850-900A, electric current is down to 300A when die surface occurs becoming color, then waits for 2-3 minutes,
Until entire mold at when coffee color close power supply passivation terminate, after rinsed with water purification；
Step 5：Gluing, glue.
A kind of mould making process of high rigidity high life chrome-plated mould, cleaning treatment includes the following steps in step 3：
Mold keeps drying, and clean mold with absolute ethyl alcohol remains greasy dirt in lathe process；
Water purification is added to clean repeatedly 3 times after ethyl alcohol cleans, then with cleanser；
A warp situation is rolled in inspection, and it is whole to carry out manual sand with 1500 mesh waterproof abrasive papers, such as rolls and puts, and manual sand is whole to exempt from, directly into
Enter the next step；
Die surface is scraped with alumina powder again, mold rotating speed is adjusted to 15 revs/min when scraping, and warp can be flattened after processing
Line；
Mold is cleaned with giant, muzzle with mold respectively wash once, finally in angle of 45 degrees by left and right directions when cleaning
Primary that mold is made to be cleaned with hydraulic giant degree in a vertical angle, in entire cleaning process, mold rotating speed must not exceed 50 revs/min；
Used metabisulfite solution is positive and negative to die surface progress again, rotates forward each primary pour washes, and pours wash one liter every time, and keep mould
Tool rotation half a minute；
It pours and is washed down with water after washing, wash down rear mold and be maintained at moisture state and immediately enter electric shock rinse bath.
A kind of mould making process of high rigidity high life chrome-plated mould, in step 3 electric shock cleaning include the following steps：
After mold enters electric shock tank, 1-2 minutes idle warm-ups are first carried out, electric shock tank liquor temperature is maintained between 30-50 degree, preheats
After, using 300A electric currents from anode to cathodic discharge 7 minutes, then change mold again after current direction is run 1 minute
It slings, is then washed down with water.
A kind of mould making process of high rigidity high life chrome-plated mould, plating bottom nickle includes the following steps in step 3：
Electric shock is hung to rinse bath immediately after completing cleaning, is poured again with dilute sulfuric acid after being rinsed one time with water purification and carries out plating bottom nickle after washing,
Electric current starts to be added to 200-250A with 50A when plating bottom nickle, plates 60-70A/H；After the completion of plating bottom nickle, rinse bath is hung again, with net
Water rinses and hangs in chrome-plating bath immediately.
A kind of mould making process of high rigidity high life chrome-plated mould, the chromium plating liquid in step 3 are electroplated using HEEF25 hard chromes
Liquid, in detail proportioning are：Chromic acid 225-275 grams per liters, it is proposed that 250 grams per liters of amount；Bright sulfur 1.84 grams per milliliters of acid, it is proposed that 3 grams per liters of amount；
Three rank chromium 1-3 grams per liters；Temperature 50-65 degree, it is proposed that 60 degree；30-70A/ square decimeters of cathode-current density, it is proposed that 60A；Anode
15-35A/ square decimeters of current density, it is proposed that 30A；1000 peace times hour of often consumption need to supplement 150 grams of supplement salt, model
HEEF25RS。
The detailed proportioning of a kind of mould making process of high rigidity high life chrome-plated mould, the passivating solution in step 4 is that chromic anhydride is blunt
Change 95 grams per liter of liquid, 275 mg/litre of hydrochloric acid, 2 grams/300 milliliters of barium chloride.
A kind of mould making process of high rigidity high life chrome-plated mould, the sodium peroxydisulfate that cleaning treatment process uses in step 3
Solution is matched with water purification：150g/L*3L, temperature are more than 70 degrees Celsius.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention is used in die surface chrome-plated process so that the wearability and anti-destructive of mold greatly improve, thus into one
The service life that step substantially increases mold can not only greatly save cost, moreover it is possible to improve plating piece by long-term use
Physical property and finish, improve high mesh number nickel screen percent opening.
Description of the drawings
Fig. 1 is the diagrammatic cross-section of high rigidity high life chrome-plated mould of the present invention.
Wherein：
Spindle nose 1, base tube 2, bottom nickel 3, layers of copper 4, nickel layer 5, layers of chrome 6, passivation layer 7, glue layer 8.
Specific implementation mode
A kind of high rigidity high life chrome-plated mould of the present invention, it includes spindle nose 1, base tube 2, bottom nickel 3, layers of copper 4, nickel
Layer 5, layers of chrome 6, passivation layer 7 and glue layer 8.
The spindle nose 1 has two pieces, each one of left and right to be installed on the both ends of base tube 2 respectively；Bottom nickel 3 is compound in 2 appearance of base tube
Face, layers of copper 4 are compound in 3 outer surface of bottom nickel, and nickel layer 5 is compound in 4 outer surface of layers of copper, and layers of chrome 6 is compound in nickel layer outer surface, passivation layer
7 are compound in 6 outer surface of layers of chrome, and glue layer 8 is compound in 7 outer surface of passivation layer.
A kind of mould making process of high rigidity high life chrome-plated mould of the present invention, it is comprised the steps of：
Step 1：Preparation.
1, mold polish,
2, annular knurl is carried out to mold according to the mesh number of customer requirement, this step when nickel molds is originally used to need gluing, this hair
It is bright to omit gluing,
3, high temperature deoils, and mold is put into 300 DEG C of high temperature steam box, makes the oil evaporation of die surface.
Step 2：Copper facing.
1, it cleans,
The first step：Iron stamen mould first with 120 mesh iron sand skins to die surface processing after, then with 400 mesh iron sand skins processing；
Second step：Mold is cleaned with absolute alcohol, must be rinsed well with tap water after scouring；
Third walks：Mold progress oil removing is cleaned with washing powder plus cleanser and is washed down with tap water；
4th step：Mold is put into motor slot, preheating is powered after one minute and carries out electric shock cleaning, design parameter and method：Electric current
300A, cathodic discharge 7 minutes, then anode discharge 1 minute, cleaning finish inspection die surface, phenomena such as if any sand holes, then the mould
Tool is regarded as scrapping；
5th step：It is poured with 50% dilute hydrochloric acid and washes die surface, poured mold when washing and preferably must be held in rotary state, pour and be rotated further by 1 after washing
It is washed down with tap water after minute；
6th step：Operation is repeated once with the 5th step again with 25% dilute hydrochloric acid；
2, plating bottom nickle,
7th step：Mold must be moved rapidly into nickel bath to and be rotated immediately mold after completing the 6th step, preheating is delayed after 1 minute
The slow electricity that rises plates 310 words to 250A（70 words are about a thickness）；
8th step：After the completion of plating bottom nickle, with 400 mesh waterproof abrasive papers on water sand machine with planker sand 3-4 back and forth, then with 50% dilute salt
Acid pours die surface and washes, and pouring needs to be washed down with water after keeping rotation 1 minute after washing；
9th step：With 25% dilute hydrochloric acid again mold pour wash after wash down；
3, copper facing,
Tenth step：Die surface pour with 50% sulfuric acid wash after be put into copper plating groove；
11st step：Mold enters after copper plating groove rises electricity to 50A immediately, and 300A is risen to again after waiting for 2-3 minutes（Artificial observation is thick
Degree, general 5 thread/hour of copper plating rate, plating copper process completion about need 7 working days）；
12nd step：Copper facing terminates to use lathe turning, be used in combination 40 mesh formpistons to carry out breaking down to copper base compacting, turning is extremely again after compacting
Outer diameter needed for multiple plating；
4, multiple plating cleaning,
13rd step：Surface clean is carried out to mold with washing powder cleanser；
14th step：With 800 mesh waterproof abrasive papers to 2 to 3, die surface sand back and forth after poured wash with 50% sulfuric acid again, and keep mold
Rotation 1 minute；
15th step：It is put into copper plating groove, with 72 hours of 300A electric currents copper facing, multiple plating end is a little required outer to rolling with lathe process
Diameter into polishing, water sand, rolls a process；
Step 3：Chromium plating.
1, cleaning treatment,
The first step：Mold must keep drying, and mold is carefully cleaned with absolute ethyl alcohol and remains greasy dirt in lathe process；
Second step：Water purification is added to clean repeatedly 3 times after ethyl alcohol cleans, then with cleanser；
Third walks：A warp situation is rolled in inspection, and it is whole to carry out manual sand with 1500 mesh waterproof abrasive papers, such as rolls and puts, and manual sand is whole to exempt from,
It is directly entered the next step；
4th step：Die surface is scraped with alumina powder again, mold rotating speed is adjusted to 15 revs/min, after processing when scraping
Warp can be flattened；
5th step：Mold is cleaned with giant, left and right directions respectively washes one to muzzle in angle of 45 degrees with mold when cleaning
It is secondary, mold can for the last time cleaned with hydraulic giant degree in a vertical angle, in entire cleaning process, mold rotating speed must not exceed 50
Rev/min；
6th step：Used metabisulfite solution again（It must be matched with water purification：150g/L*3L, temperature are more than 70 degrees Celsius）To mold
Surface carries out positive and negative, each primary pour of rotating forward and washes, and pours wash one liter every time, and kept for mold rotation half a minute；
7th step：It pours and is washed down with water purification with fountain head after washing, wash down rear mold and preferably must be held in moisture state and rapidly enter electric shock
Rinse bath；
2, electric shock cleaning,
8th step：After mold enters electric shock tank, it is necessary to carry out 1-2 minutes idle warm-ups, electric shock tank liquor temperature preferably must be held in 30-
Between 50 degree, after preheating, using 300A electric currents from anode（Copper bar）To cathode（Mold）Electric discharge 7 minutes, then changes again
Current direction slings mold after running 1 minute, is rinsed well with water purification（Points for attention：Electricity must not be risen before mold preheating, otherwise
Electric shock print can be generated to mold）；
3, plating bottom nickle,
9th step：Electric shock is hung to rinse bath immediately after completing cleaning, is poured with dilute sulfuric acid after being rinsed one time with water purification and is carried out after washing again
Plating bottom nickle, electric current is started with 50A when plating bottom nickle, is gradually added to 200-250A, plates 60-70A/H；
Tenth step：After the completion of plating bottom nickle, rinse bath is hung again, is rinsed with water purification and hangs in chrome-plating bath immediately；
4, chromium plating,
11st step：Chrome-plating bath requires work nest tank liquor temperature that must reach and is maintained at 58 degree, and mold needs before entering by tank liquor
Work nest is evacuated to from heating tank, mold is unable to starting current after hanging in, it is necessary to allow mold prerotation 1 minute in chromium plating liquid, 1 point
Electric current must be quickly raised to 4500A or more within the shortest time after clock（This work needs two people cooperation, a people to be responsible for observation
Anode reaction in chrome-plating bath, one quickly flows up simultaneously）, when every anode and chromium plating liquid contact position generation bubble, wait for 2-3
Minute after electric current can be adjusted to 1900-2000A and keep current stabilization run 2000 numbers of words (this numerical value is by 640* length
What the surface area of 2000MM calculated, if circumference or length are varied from, it need to be synchronized by the increased multiple of surface area institute and increase chromium plating
Electricity number of words)；
12nd step：Operation expires after stopping, closing chrome liquor circulating pump, and chrome liquor to be plated is washed down with water after lowering into secondary slot, hung
Enter deactivation slot.
Step 4：Passivation.
The first step：Passivating solution temperature must be 50 degree or so in deactivation slot（Between 45-50 degree）, before mold enters, it is necessary to close
Circulating pump, after mold enters, it is necessary to electricity, current value 850-900A are risen after dallying 1 minute, 1 minute（This numerical value is 640 data,
914 be 600-550A）, when die surfaces being waited to occur becoming color（Become coffee-like by yellow）Electric current is down to 300A, then waits for 2-3 points
Clock, until entire mold terminates at power supply passivation is closed when coffee color, after need to be rinsed with water purification, when flushing, must be noted that：
Flow must not be too anxious, should gently mitigate flushing, in case too urgent flow damage die surface is passivated particle；
Second step：After the completion of passivation procedure, mold can enter gluing finishing operations.
Step 5：Gluing.
The first step：Must baking oven be first preheated to 50-100 degree and kept；
Second step：Mold after passivated should hang in baking oven in the shortest time；
Third walks：After mold enters baking oven, it is necessary to carry out surface clean to surface with the net warm water of 30-50 degree, start after cleaning knot
It is heated up between 95-108 degree, heating time is 2 hours；
4th step：Heating terminates to wait for mold natural cooling, when measuring mold surface temperature with temperature measurer and dropping to 70 degree or so,
It is glued with 3M glue；
5th step：It is heated again after first-class 3M glue, for heating temperature between 180-200 degree, warm-up time is 2 hours；Add
Temperature terminates that mold is made to naturally cool to natural temperature progress water sand；
6th step：Manually use the waterproof abrasive paper of 800-1000 mesh that two end glue sand of mold is clear when water sand, then with planker in mold
Between glue sand it is clear（Pay attention to：The not handy hand sanding in mold middle section）；
7th step：It is polished after mold glue water sand is clear, polishing requirement must reach die surface without broken profit, secret note print, polishing
Time is about 3 hours；
8th step：Polishing end is once purged to carry out glue again, and repeats the 5th step to the 6th step program 2 times, you can by mould
Tool hands over system net workshop net.
Using HEEF25 hard chrome electroplate liquids, proportioning in detail is chromium plating liquid in step 3：Chromic acid 225-275 grams per liters, it is proposed that
Measure 250 grams per liters；Bright sulfur acid（The grams per milliliter of density=1.84）, it is proposed that 3 grams per liters of amount；Three rank chromium 1-3 grams per liters；Temperature 50-65 degree,
It is recommended that 60 degree；30-70A/ square decimeters of cathode-current density, it is proposed that 60A；15-35A/ square decimeters of anodic current density, it is proposed that
30A.1000 peace times hour of often consumption need to supplement 150 grams of supplement salt, model HEEF25RS.
The detailed proportioning of passivating solution in step 4：95 grams per liter of chromic anhydride passivating solution, 275 mg/litre of hydrochloric acid, barium chloride 2
Gram/300 milliliters.
The specific application example that the above is only the present invention, is not limited in any way protection scope of the present invention.All uses
Equivalent transformation or equivalent replacement and the technical solution formed, all fall within rights protection scope of the present invention.
Claims (9)
1. a kind of high rigidity high life chrome-plated mould, it is characterised in that：It includes spindle nose（1）, base tube（2）, bottom nickel（3）, layers of copper
（4）, nickel layer（5）, layers of chrome（6）, passivation layer（7）And glue layer（8）.
2. high rigidity high life chrome-plated mould according to claim 1, it is characterised in that：The spindle nose（1）There is two pieces, point
Base tube is not installed on it（2）Both ends；Bottom nickel（3）It is compound in base tube（2）Outer surface, layers of copper（4）It is compound in bottom nickel（3）Outer surface,
Nickel layer（5）It is compound in layers of copper（4）Outer surface, layers of chrome（6）It is compound in nickel layer outer surface, passivation layer（7）It is compound in layers of chrome（6）Appearance
Face, glue layer（8）It is compound in passivation layer（7）Outer surface.
3. a kind of mould making process of high rigidity high life chrome-plated mould, which is characterized in that it includes the following steps：
Step 1：Preparation：Annular knurl is carried out after mold polish, then high temperature deoils；
Step 2：Copper facing：Then mold is put into copper plating groove and carries out copper facing by plating bottom nickle after die surface cleaning, finally multiple plating is clear
It washes；
Step 3：Chromium plating：First cleaning treatment, then electric shock cleaning, then plating bottom nickle, then carries out chromium plating, chrome-plating bath tank liquor temperature
Degree reaches and is maintained at 50-60 degree, and tank liquor is evacuated to work nest by mold into preceding from heating tank, and mold cannot start after hanging in
Electric current, allows mold prerotation 1 minute in chromium plating liquid, electric current is raised to 4500A or more in 5-15 seconds after 1 minute, when every sun
When pole generates bubble with chromium plating liquid contact position, electric current can be adjusted to 1900-2000A after waiting for 2-3 minutes and keep current stabilization
Run 2000 numbers of words；
Operation expires after stopping, closing chrome liquor circulating pump, and chrome liquor to be plated is washed down after lowering into secondary slot with water, hangs in deactivation slot；
Step 4：Passivation：
For passivating solution temperature between 45-50 degree, mold enters preceding closing circulating pump in deactivation slot, and mold dallies 1 minute after entering,
Electricity is risen after 1 minute, current value 850-900A, electric current is down to 300A when die surface occurs becoming color, then waits for 2-3 minutes,
Until entire mold at when coffee color close power supply passivation terminate, after rinsed with water purification；
Step 5：Gluing, glue.
4. the mould making process of high rigidity high life chrome-plated mould according to claim 3, it is characterised in that：It is clear in step 3
Processing is washed to include the following steps：
Mold keeps drying, and clean mold with absolute ethyl alcohol remains greasy dirt in lathe process；
Water purification is added to clean repeatedly 3 times after ethyl alcohol cleans, then with cleanser；
A warp situation is rolled in inspection, and it is whole to carry out manual sand with 1500 mesh waterproof abrasive papers, such as rolls and puts, and manual sand is whole to exempt from, directly into
Enter the next step；
Die surface is scraped with alumina powder again, mold rotating speed is adjusted to 15 revs/min when scraping, and warp can be flattened after processing
Line；
Mold is cleaned with giant, muzzle with mold respectively wash once, finally in angle of 45 degrees by left and right directions when cleaning
Primary that mold is made to be cleaned with hydraulic giant degree in a vertical angle, in entire cleaning process, mold rotating speed must not exceed 50 revs/min；
Used metabisulfite solution is positive and negative to die surface progress again, rotates forward each primary pour washes, and pours wash one liter every time, and keep mould
Tool rotation half a minute；
It pours and is washed down with water after washing, wash down rear mold and be maintained at moisture state and immediately enter electric shock rinse bath.
5. the mould making process of high rigidity high life chrome-plated mould according to claim 3, it is characterised in that：It is electric in step 3
Cleaning is hit to include the following steps：
After mold enters electric shock tank, 1-2 minutes idle warm-ups are first carried out, electric shock tank liquor temperature is maintained between 30-50 degree, preheats
After, using 300A electric currents from anode to cathodic discharge 7 minutes, then change mold again after current direction is run 1 minute
It slings, is then washed down with water.
6. the mould making process of high rigidity high life chrome-plated mould according to claim 3, it is characterised in that：It is plated in step 3
Bottom nickel includes the following steps：
Electric shock is hung to rinse bath immediately after completing cleaning, is poured again with dilute sulfuric acid after being rinsed one time with water purification and carries out plating bottom nickle after washing,
Electric current starts to be added to 200-250A with 50A when plating bottom nickle, plates 60-70A/H；After the completion of plating bottom nickle, rinse bath is hung again, with net
Water rinses and hangs in chrome-plating bath immediately.
7. the mould making process of high rigidity high life chrome-plated mould according to claim 3, it is characterised in that：In step 3
Chromium plating liquid use HEEF25 hard chrome electroplate liquids, in detail proportioning be：Chromic acid 225-275 grams per liters, it is proposed that 250 grams per liters of amount；Bright sulfur acid
1.84 grams per milliliters, it is proposed that 3 grams per liters of amount；Three rank chromium 1-3 grams per liters；Temperature 50-65 degree, it is proposed that 60 degree；Cathode-current density 30-
70A/ square decimeters, it is proposed that 60A；15-35A/ square decimeters of anodic current density, it is proposed that 30A；1000 peace times hour of often consumption needs
150 grams of supplement salt of supplement, model HEEF25RS.
8. the mould making process of high rigidity high life chrome-plated mould according to claim 3, it is characterised in that：In step 4
The detailed proportioning of passivating solution is 95 grams per liter of chromic anhydride passivating solution, 275 mg/litre of hydrochloric acid, 2 grams/300 milliliters of barium chloride.
9. the mould making process of high rigidity high life chrome-plated mould according to claim 4, it is characterised in that：It is clear in step 3
The sodium peroxydisulfate solution that treatment process uses is washed to be matched with water purification：150g/L*3L, temperature are more than 70 degrees Celsius.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113373487A (en) * | 2021-05-26 | 2021-09-10 | 上海恩耀机电有限公司 | Metal plating process for mold erosion |
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