CN208869677U - High rigidity high life chrome-plated mould - Google Patents

Abstract

The utility model relates to 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, and the spindle nose has two pieces, is installed on the both ends of base tube respectively；Bottom nickel is compound in base tube outer surface, and 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, and passivation layer is compound in layers of chrome outer surface, and glue layer is compound in passivation layer outer surface.The utility model 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

High rigidity high life chrome-plated mould

Technical field

The utility model relates to net technical field of mold processed more particularly to a kind of high rigidity high life chrome-plated moulds.

Background technique

The mold of production nickel screen is all plating nickel on surface now, but since the surface 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 surface hardness of chrome layer is up to 500HV-1800HV, if mould can be made using die surface chrome-plated process Have surface 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 The problems such as face is smooth, can not carry out glue process, so chrome-plated mould has not been used in the industry.

Utility model content

Purpose of the utility model is to overcome the above-mentioned shortcomings and provide a kind of high rigidity high life chrome-plated mould, save at This, improves the percent opening of nickel screen.

Purpose of the utility model is realized as follows:

A kind of high rigidity high life chrome-plated mould, it include 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 high rigidity high life chrome-plated mould, the passivation layer include passivating solution, and the detailed proportion of the 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.

Compared with prior art, the utility model has the beneficial effects that

The utility model is used in die surface chrome-plated process, so that the wearability and anti-destructive of mold greatly improve, Service life to further substantially increase mold can not only greatly save cost by long-term use, moreover it is possible to improve and The physical property and finish of plating piece are improved, the percent opening of high mesh number nickel screen is improved.

Detailed description of the invention

Fig. 1 is the diagrammatic cross-section of the utility model high rigidity high life chrome-plated mould.

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 embodiment

The utility model relates to a kind of high rigidity high life chrome-plated mould, 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, and each one of left and right is 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.

The utility model relates to a kind of high rigidity high life chrome-plated mould mould making process, 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, The utility model can 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,

Step 1: iron stamen mould first use 120 mesh iron sand skins to die surface processing after, then with 400 mesh iron sand skins processing；

Step 2: being cleaned with absolute alcohol to mold, must be rinsed well with tap water after scouring；

Step 3: adding cleanser to clean mold progress oil removing with washing powder and being washed down with tap water；

Step 4: mold is put into motor slot, it is powered after preheating 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 finished inspection die surface, phenomena such as if any sand holes, then The mold is regarded as scrapping；

Die surface is washed step 5: being poured with 50% dilute hydrochloric acid, pouring mold when washing preferably must be held in rotary state, pour after washing again Rotation is washed down after 1 minute with tap water；

Step 6: being repeated once operation again with 25% dilute hydrochloric acid with the 5th step；

2, plating bottom nickle,

Step 7: mold must be moved rapidly into nickel bath to and be rotated immediately mold after completing the 6th step, preheat 1 minute Electricity is slowly risen afterwards to 250A, plates 310 words (70 words are about a thickness)；

Step 8: 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 hydrochloric acid pours die surface and washes, and pouring needs to be washed down after keeping rotation 1 minute with water after washing；

Step 9: with 25% dilute hydrochloric acid again mold pour wash after wash down；

3, copper facing,

Step 10: die surface pour with 50% sulfuric acid wash after be put into copper plating groove；

Step 11: mold enters after copper plating groove rises electricity to 50A immediately, 300A(is risen to again after waiting 2-3 minutes and is manually seen Thickness, general 5 thread/hour of copper plating rate are examined, plating copper process completion about needs 7 working days)；

Step 12: copper facing terminates with lathe turning, and breaking down is carried out to copper base compacting with 40 mesh formpistons, vehicle again after compacting It cuts to outer diameter needed for multiple plating；

4, multiple plating cleaning,

Step 13: carrying out surface clean to mold with washing powder cleanser；

Step 14: 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；

It is multiple to plate end with lathe process to rolling an institute with 72 hours of 300A electric current copper facing step 15: be put into copper plating groove Outer diameter is needed, into polishing, water sand, rolls a process；

Step 3: chromium plating.

1, cleaning treatment,

Step 1: mold must keep drying, mold residual greasy dirt in lathe process is carefully cleaned with dehydrated alcohol；

Step 2: adding water purification to clean repeatedly 3 times after ethyl alcohol cleans, then with cleanser；

Step 3: check roll a warp situation, with 1500 mesh waterproof abrasive papers carries out craft sand it is whole, such as roll and put, manual sand is whole It can exempt from, be directly entered the next step；

Step 4: being scraped again with alumina powder to die surface, mold revolving speed is adjusted to 15 revs/min when scraping, place Warp can be flattened after reason；

Step 5: cleaned with giant to mold, left and right directions is each in angle of 45 degrees with mold for muzzle when cleaning It washes once, mold and hydraulic giant degree in a vertical angle can for the last time cleaned, in entire cleaning process, mold revolving speed be must not exceed 50 revs/min；

Step 6: used metabisulfite solution (must be matched with water purification: 150g/L*3L, temperature are greater than 70 degrees Celsius) is right again Die surface carries out positive and negative, each once pour of rotating forward and washes, and pours wash one liter every time, and kept for mold rotation half a minute；

Step 7: pour wash after washed down with fountain head with water purification, wash down rear mold and preferably must be held in moisture state and rapidly enter Shock by electricity rinse bath；

2, electric shock cleaning,

Step 8: after mold enters electric shock tank, it is necessary to carry out 1-2 minutes idle warm-ups, electric shock tank liquor temperature must be kept Between 30-50 degree, after preheating, discharged 7 minutes using 300A electric current from anode (copper bar) to cathode (mold), then again Change after current direction is run 1 minute and slings mold, rinsed well with water purification (points for attention: must not rise electricity before mold preheating, Otherwise electric shock print can be generated to mold)；

3, plating bottom nickle,

Step 9: electric shock is hung to rinse bath after completing cleaning immediately, poured again with dilute sulfuric acid after being rinsed one time with water purification after washing Plating bottom nickle is carried out, electric current is started with 50A when plating bottom nickle, is gradually added to 200-250A, plates 60-70A/H；

Step 10: hanging rinse bath again after the completion of plating bottom nickle, being rinsed with water purification and hanging in chrome-plating bath immediately；

4, chromium plating,

Step 11: chrome-plating bath requires work nest tank liquor temperature that must reach and is maintained at 58 degree, mold needed before entering by Tank liquor is evacuated to work nest from heating tank, and mold is unable to starting current after hanging in, it is necessary to mold prerotation 1 in chromium plating liquid be allowed to divide Clock, electric current must be quickly raised to 4500A or more after 1 minute within the shortest time, and (this work needs two people cooperation, and a people is negative Duty observes anode reaction in chrome-plating bath, and one quickly flows up simultaneously), when every anode and chromium plating liquid contact position generation bubble, Electric current can be adjusted to 1900-2000A after waiting 2-3 minute and keep 2000 numbers of words of current stabilization operation (this numerical value be by What the surface area of 640* length 2000MM calculated, it, need to be synchronous by the increased multiple of surface area institute if circumference or length are varied Increase chromium plating electricity number of words)；

Step 12: operation expires after stopping, chrome liquor circulating pump is closed, chrome liquor to be plated is rushed after lowering into secondary slot with water Only, deactivation slot is hung in.

Step 4: passivation.

Step 1: passivating solution temperature must be 50 degree or so (between 45-50 degree) in deactivation slot, before mold enters, it is necessary to close Circulating pump, after mold enters, it is necessary to electricity is risen after dallying 1 minute, 1 minute, it is 640 data that current value, which is 850-900A(this numerical value, 914 be 600-550A), (becoming coffee-like by yellow) when die surfaces being waited to occur becoming color, electric current is down to 300A, then waits 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 it must be noted that Water flow must not be too anxious, should gently mitigate flushing, in case too urgent water flow damage die surface is passivated particle；

Step 2: mold can enter gluing finishing operations after the completion of passivation procedure.

Step 5: gluing.

Step 1: baking oven first must be preheated to 50-100 degree and kept；

Step 2: the mold after passivated should hang in baking oven in the shortest time；

Step 3: after mold enters baking oven, it is necessary to surface clean is carried out to surface with the net warm water of 30-50 degree, after cleaning is tied Start to be heated up between 95-108 degree, heating time is 2 hours；

Step 4: heating terminates to measure mold surface temperature to mold natural cooling with temperature measurer and drop to 70 degree of left sides When right, glued with 3M glue；

Step 5: being heated again after first-class 3M glue, for heating temperature between 180-200 degree, warm-up time is 2 small When；Heating terminates that mold is made to naturally cool to natural temperature progress water sand；

Step 6: it is clear by two end glue sand of mold manually to use the waterproof abrasive paper of 800-1000 mesh when water sand, then with planker to mould It is clear (noting: the not handy hand sanding in mold middle section) to have intermediate rubber water sand；

Step 7: being polished after mold glue water sand is clear, polishing requirement must reach die surface and print without broken profit, secret note, Polishing time is about 3 hours；

Step 8: polishing end is once purged to carry out glue again, and repeat the 5th step to the 6th step program 2 times Mold is handed over into system net workshop net.

Chromium plating liquid in step 3 uses HEEF25 hard chrome electroplate liquid, matches in detail are as follows: chromic acid 225-275 grams per liter, it is proposed that Measure 250 grams per liters；Bright sulfur acid (density=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 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.Every 1000 peace times hour of consumption need to supplement 150 grams of supplement salt, model HEEF25RS.

The detailed proportion 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 above is only the specific application examples of the utility model, do not constitute any limit to the protection scope of the utility model System.Any technical scheme formed by adopting equivalent transformation or equivalent replacement, all fall within the utility model rights protection scope it It is interior.

Claims (1)

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)；The spindle nose (1) has two pieces, is installed on base tube (2) respectively Both ends；Bottom nickel (3) is compound in base tube (2) outer surface, and layers of copper (4) is compound in bottom nickel (3) outer surface, and nickel layer (5) is compound in copper Layer (4) outer surface, layers of chrome (6) are compound in nickel layer outer surface, and passivation layer (7) is compound in layers of chrome (6) outer surface, and glue layer (8) is multiple Together in passivation layer (7) outer surface.