CN104308162B - A kind of preparation method of metal deposit rod - Google Patents
A kind of preparation method of metal deposit rod Download PDFInfo
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- CN104308162B CN104308162B CN201410502139.6A CN201410502139A CN104308162B CN 104308162 B CN104308162 B CN 104308162B CN 201410502139 A CN201410502139 A CN 201410502139A CN 104308162 B CN104308162 B CN 104308162B
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Abstract
The present invention relates to the preparation method of a kind of metal deposit rod, belong to precision equipment preparing technical field.Preparation process of the present invention comprises the steps: the mould that step one, design match with film rod size, and the cavity surface of described mould is uniformly plated with layers of chrome, and described layers of chrome roughness Ra is in 0.1 0.2 μm；Step 2, by volume percentage ratio, metal dust 55 65%；Bonding agent 35 15%；Join and take metal dust and bonding agent mix homogeneously, obtain feeding；Step 3, feeding is heated to 150 180 DEG C, with the injection pressure of 80 120Mpa, feeding is expelled in mould, pressurize after feeding fills up mould, cooling, the demoulding, the material base that must be sized；Step 4, material base is carried out ungrease treatment, after obtaining defat material base, sinter under protective atmosphere, obtain metal deposit rod；The temperature of described sintering is 1,200 1400 DEG C.The present invention solves wire wrap spreading rod surface finer wire and easily gets loose disrumpent feelings, difficult cleaning of problem.Preparation technology of the present invention is simple, it is simple to commercial application, the prepared wet film that metal deposit rod energy coating thickness is 10 μm.
Description
Technical field
The present invention relates to the preparation method of a kind of metal deposit rod, belong to precision equipment preparing technical field.
Background technology
Film rod is applicable to the usual out-of-flatnesses in various flexible substrate surfaces such as paperboard, plastic tab, leather, textile or has part
The surface coating of protuberance.Substrate can be rolled smooth when coating device drags in substrate.The groove that on coating device, screw thread is formed is used
Produce the film of appointed thickness.Theoretical thickness is determined by thread pitch.Currently, traditional bar coating device is all in Steel Wire Surface
Being wound around what finer wire was coated, the finer wire on its surface easily gets loose disrumpent feelings, and steel wire easily fills in long-pending coating between carefully stitching,
Not easy cleaning, can not carry out the coating of ultrathin membrane.Its technology content is relatively low, product percent defective height, low precision, be easily imitated,
Homogeneity dog-eat-dog, added value is low.Still suffer from China's film rod industry that small scale, brand recognition be low, product shelves at present
Secondary low, the problems such as technology competition is indifferent.Its main cause is exactly that the film rod product of most domestic enterprise concentrates on low side
Market, between enterprise, product homogeneity is serious, and product development innovation ability is not enough, and product profit rate declines year by year, lacks international competing
Strive power.
Injection moulding is a kind of near-net-shape technology, but up to the present yet there are no the report utilizing near-net-shape technology to prepare film rod
Road, its possible cause is: rustless steel film rod the waviness curve of its concave-convex surface is required harsh (as to precision, lubricity,
Fluency all has strict requirements), cause near-net-shape technology to be difficult to prepare film rod.
Summary of the invention
The present invention is directed to the weak point that existing film rod exists, it is provided that in one, use Novel powder metallurgy near-net-shape technology to prepare
The method of metal deposit rod.
The preparation method of a kind of metal deposit of present invention rod, comprises the steps:
Step one
The mould that design matches with film rod size, the cavity surface of described mould is uniformly plated with layers of chrome, throws through fine grinding, essence
Light makes the roughness Ra of described layers of chrome in 0.05-0.2 μm；
Step 2
By volume percentage ratio,
Metal dust 55-65%, preferably 60-65%, more preferably 60%；
Bonding agent 35-45%, preferably 35-40%, more preferably 40%；
Join and take metal dust and bonding agent mix homogeneously, obtain feeding；
Step 3
Feeding is heated to 150-180 DEG C, with the injection pressure of 80-120Mpa, feeding is expelled in mould, when feeding is filled out
Pressurize after full mould, cooling, the demoulding, the material base that must be sized；
Step 4
Material base is carried out ungrease treatment, after obtaining defat material base, sinters under protective atmosphere, obtain metal deposit rod；Described burning
The temperature of knot is 1200-1400 DEG C, preferably 1300-1380 DEG C, more preferably 1320-1360 DEG C.
The preparation method of a kind of metal deposit of present invention rod, the thickness of layers of chrome described in step one is 0.1-0.25mm, is preferably
0.15-0.2mm, more preferably 0.2mm.
The preparation method of a kind of metal deposit of present invention rod, metal dust described in step 2 is 304L powder of stainless steel or 317L
Powder of stainless steel；Its granularity≤40um, preferably 10-40um, more preferably 20-40um.
The preparation method of a kind of metal deposit of present invention rod, bonding agent described in step 2 includes following component by percentage to the quality:
Paraffin (PW) 75-90%, preferably 75-85%, more preferably 78-82%；
Ethene-vinyl acetate copolymer (EVA) 0.1-15%, preferably 5-15%, more preferably 8-12%；
Polypropylene (PP) 0.1-20%, preferably 5-15%, more preferably 8-12%；
Stearic acid (SA) 0.1-3%, preferably 0.5-2%, more preferably 0.75-1.5%.
The preparation method of a kind of metal deposit of present invention rod, in step 2, it is by following that bonding agent is mixed homogeneously with metal dust
Step realizes:
Join by the binder formula of design after taking each raw material, after 80-150 DEG C of mix homogeneously, add it by joining the metal dust taken
In, it is mixed evenly at 155-175 DEG C, pelletizes, obtain the feeding that granularity is 0.5-2.5mm.
In actual mechanical process, joining after taking each raw material by the binder formula of design, at 80-150 DEG C, controlling mixing speed is
400-800r/min, mixes 1-3 hour, the bonding agent being uniformly mixed.
After the bonding agent being uniformly mixed, adding feed metal powder, in kneader, controlling mixing speed is
400-1000r/min, mediates stirring 2-4 hour, obtains the feeding that granularity is 0.5-2.5mm.
The preparation method of a kind of metal deposit of present invention rod, in step 3, during injection feeding, controlling injection speed is injection used
The 50-60% of machine system maximum injection speed.In injection process, the temperature controlling outer mold wall is 30-40 DEG C.
A kind of metal deposit of the present invention rod preparation method, in step 4, described ungrease treatment include successively solvent degreasing process and
Heating ungrease treatment；
Described solvent degreasing is processed as: at 20-50 DEG C, is immersed by material base in solvent after 2-4 hour, is dried, and obtains solvent and takes off
Material base after fat；When being dried, control temperature and be 20-40 DEG C；Described solvent selected from dichloromethane, chloroform, normal heptane,
At least one in trichloro ethylene；
Described thermal debinding is processed as: under protective atmosphere, puts in heating furnace by the material base after solvent degreasing, with 2-5 DEG C/min
Heating rate be first to heat to 180-220 DEG C, after being incubated 40-80 minute, then be warming up to the heating rate of 1-3 DEG C/min
360-415 DEG C, it is incubated 40-80min, is then warming up to 420-450 DEG C with the heating rate of 1-3 DEG C/min, be incubated 80-100min,
Then it is warming up to 580-650 DEG C with the heating rate of 1-3 DEG C/min, is incubated 80-100min, the intensification of last 1-3 DEG C/min
Ramp, to 850-950 DEG C, is incubated 1-2h, furnace cooling, obtains defat material base；Described protective atmosphere selected from hydrogen atmosphere,
One in nitrogen atmosphere, argon gas atmosphere.
The preparation method of a kind of metal deposit of present invention rod, in step 4, the atmosphere of described sintering is selected from hydrogen atmosphere, nitrogen gas
One in atmosphere, argon gas atmosphere；During sintering, control sintering time is 2-5h；After having sintered, cool to room temperature with the furnace,
To finished product.
The preparation method of a kind of metal deposit of present invention rod, prepared metal deposit rod energy coating thickness is only the wet film of 10 μm.
The preparation method of a kind of metal deposit of present invention rod, the live width of the prepared metal deposit wavy curve of rod concave-convex surface and ripple
Peak can adjust according to the actual requirements to the distance of trough.
Principle and advantage
The present invention passes through mould, feeding, injection moulding, defat, the synergism of sintering, has obtained the wavy curve of concave-convex surface
Uniformly, lubrication, continuous print metal deposit rod；Effectively solve finer wire on traditional bar film rod and easily get loose disrumpent feelings,
And steel wire easily fills in long-pending coating, not easy cleaning between carefully stitching, and can not carry out a difficult problem for the coating of ultrathin membrane.
The present invention is by the uniform chromium plating of cavity surface and control the Ra of layers of chrome between 0.05-0.2 μm, it is to avoid mucosa situation
Occur, ensure that uniform, lubrication, the continuous distribution of the concavo-convex wavy curve on material base surface to the full extent.
The present invention controls composition and the consumption of bonding agent, coordinates appropriate size and the metal dust of consumption, further ensure that material
Uniform, lubrication, the continuous distribution of the concavo-convex wavy curve on base surface.Selecting the composition of bonding agent and consumption, metal dust
When kind, size and consumption, it is also necessary to take into account that defat, sintering time, the concavo-convex wavy curve on material base surface uniform, lubrication,
Continuous distribution；Must avoid material base after sintering, finished surface occurs that the situation of hole occurs.The present invention uses paraffin (PW)
75-90%, preferably 75-85%, more preferably 78-82%；Ethene-vinyl acetate copolymer (EVA) 0.1-15%, preferably
For 5-15%, more preferably 8-12%；Polypropylene (PP) 0.1-20%, preferably 5-15%, more preferably 8-12%；
Stearic acid (SA) 0.1-3%, preferably 0.5-2%, more preferably 0.75-1.5% is as binding agent, when 55-65v% gold
After genus powder is mixed homogeneously with 35-45V% bonding agent, at 150-180 DEG C, with the injection pressure of 80-120Mpa, it is expelled to mould
In, now suitable due to pressure and temperature, the mobility of feeding is preferable, thus ensure that being uniformly distributed of feeding to the full extent,
The most only under the synergism of above-mentioned condition, just can obtain uniform, lubrication, the continuous distribution of the concavo-convex wavy curve on surface
Material base.
The present invention uses solvent degreasing and adds the mode that thermal debinding combines and carry out defat, by control solvent degreasing time and
The kind of solvent, it is ensured that the integrity of material base.Then, under protective atmosphere, the material base after solvent degreasing is put in heating furnace,
It is first to heat to 180-220 DEG C with the heating rate of 2-5 DEG C/min, after being incubated 40-80 minute, then the intensification with 1-3 DEG C/min
Ramp, to 360-415 DEG C, is incubated 40-80min, is then warming up to 420-450 DEG C with the heating rate of 1-3 DEG C/min,
Insulation 80-100min, is then warming up to 580-650 DEG C with the heating rate of 1-3 DEG C/min, is incubated 80-100min, finally
The heating rate of 1-3 DEG C/min is warming up to 850-950 DEG C, is incubated 1-2h, furnace cooling, obtains defat material base；Add thermal debinding
Early stage (first stage, second stage, the heating and thermal insulation of phase III), is to ensure that the lipid of remnants can be with rational speed
Remove from blank, and reduce the aperture of the caused hole of this process.Early stage segmentation insulation can also deviate from corresponding binding agent respectively
Composition.By the heating in later stage, it is achieved that the sealing of hole on material base surface, so that the concavo-convex wavy profiles uniform on material base surface is equal
Even, lubrication, the characteristic of continuous distribution.
In a word, the present invention uses precision die, utilizes injection molding technology to obtain the wavy profiles uniform of concave-convex surface, lubrication, continuously
Metal deposit rod；Gained metal deposit rod is without following process with without adding auxiliary equipment, and during coating, coating is the most smooth,
Efficiency is high, it is simple to clean.The present invention not only overcomes and uses wrapping wire to manufacture the defect that film rod is brought, the most also for using essence
Close mould, utilizes injection molding technology to prepare metal deposit rod and provides scientific basis.
Accompanying drawing explanation
Accompanying drawing 1 is the partial enlarged drawing of rustless steel film rod finished product prepared by embodiment 1；
Accompanying drawing 2 is the schematic diagram of rustless steel film rod concave-convex surface curve prepared by embodiment 1；
From Fig. 1, Fig. 2 it can be seen that the prepared rustless steel concavo-convex wavy curve of film rod finished surface has uniformly, lubricates,
Continuous print characteristic.
Detailed description of the invention
Embodiment one
The mould that the present embodiment is used is that to be coated with thickness in die cavity be 0.15mm layers of chrome, and the roughness Ra of its layers of chrome is
0.05-0.075um；
Its concrete preparation process is as follows:
(1) selecting metal dust is 304L powder of stainless steel, and its size is 20 μm, and volume fraction is 65%,
(2) binding agent is consisting of PW:80%, EVA:10%, PP:9%, SA:1%, and its volume fraction is 35%, and melting temperature is at 120 DEG C.
(3) being configured to binding agent in batch mixer according to binder formula, melting temperature is 135 DEG C, and the time is 2h.Then by former
Beginning powder and binding agent are by proper proportion, and mixing 3h in kneader, melting temperature is 160 DEG C.Be suitable to through granulation afterwards
The granular feeding (its granularity is 0.5mm) of injection；
(4) the uniform feeding of preparation is expelled to cooling forming after mold for heating at high temperature flowing；Wherein injection temperature is 150 DEG C, note
Injection pressure is 100MPa, and injection speed is the injector system maximum injection speed of 50%, and the dwell time is 10s, and mold temperature keeps
40℃。
(5) defat uses solvent degreasing+thermal debinding two step defat method.Solvent used by solvent degreasing is dichloromethane, and skimming temp is
36 DEG C, after solvent degreasing 4h, in drying at room temperature 2h.Carrying out thermal debinding the most again, program is as follows:
(6) sintering above-mentioned defat rustless steel film rod finished product (its enlarged drawing is shown in Fig. 1), sintering temperature, at 1340 DEG C, is incubated 3h,
Furnace cooling.
Embodiment two
The mould that the present embodiment is used is that to be coated with thickness in die cavity be 0.2mm layers of chrome, and the roughness Ra of its layers of chrome is
0.1-0.125um；
Its concrete preparation process is as follows:
1) select metal dust be its size of 317L powder of stainless steel be 25 μm, volume fraction is 60%.
(2) binding agent is consisting of PW:78%, EVA:12%, PP:8.5%, SA:1.5%, and its volume fraction is 40%, melting temperature
At 120 DEG C.
(3) being configured to binding agent in batch mixer according to binder formula, melting temperature is 135 DEG C, and the time is 2h.Then by original
Powder and binding agent are by proper proportion, and mixing 3h in kneader, melting temperature is 160 DEG C.Obtain being suitable to note through granulation afterwards
The granular feeding (its granularity is 1mm) penetrated；
(4) the uniform feeding of preparation is expelled to cooling forming after mold for heating at high temperature flowing；Wherein injection temperature is 160 DEG C；Note
Injection pressure is 80MPa, and injection speed is the injector system maximum injection speed of 55%, and the dwell time is 10s, and mold temperature keeps
40℃。
(5) defat uses solvent degreasing+thermal debinding two step defat method.Solvent used by solvent degreasing is chloroform, and skimming temp is
50 DEG C, after solvent degreasing 2h, at 40 DEG C of dry 2h.Carrying out thermal debinding the most again, program is as follows:
(6) sintering above-mentioned defat rustless steel film rod finished product, sintering temperature, at 1360 DEG C, is incubated 3h, furnace cooling.
Embodiment three
The mould that the present embodiment is used is that to be coated with thickness in die cavity be 0.5mm layers of chrome, and the roughness Ra of its layers of chrome is
0.05-0.075um；
Its concrete preparation process is as follows:
(1) select metal dust be 304L powder of stainless steel, its size be 30 μm, volume fraction is 60%.
(2) binding agent is consisting of PW:75%, EVA:15%, PP:9%, SA:1%, and its volume fraction is 40%, and melting temperature is at 120 DEG C.
(3) being configured to binding agent in batch mixer according to binder formula, melting temperature is 135 DEG C, and the time is 2h.Then by former
Beginning powder and binding agent are by proper proportion, and mixing 3h in kneader, melting temperature is 160 DEG C.Be suitable to through granulation afterwards
The granular feeding (its granularity is 1.5mm) of injection；
(4) the uniform feeding of preparation is expelled to cooling forming after mold for heating at high temperature flowing；Wherein injection temperature is 170 DEG C, note
Injection pressure is 100MPa, and injection speed is the injector system maximum injection speed of 55%, and the dwell time is 10s, and mold temperature is protected
Hold 40 DEG C.
(5) defat uses solvent degreasing+thermal debinding two step defat method.Solvent used by solvent degreasing is normal heptane, and skimming temp is 36 DEG C,
After solvent degreasing 4h, at 20 DEG C of dry 2h.Carrying out thermal debinding the most again, program is as follows:
(6) sintering above-mentioned defat rustless steel film rod finished product, sintering temperature, at 1200 DEG C, is incubated 5h, furnace cooling.
Embodiment four
The mould that the present embodiment is used is that to be coated with thickness in die cavity be 0.2mm layers of chrome, and the roughness Ra of its layers of chrome is
0.175-0.2um；
Its concrete preparation process is as follows:
(1) select metal dust be 304L powder of stainless steel, its size be 40 μm, volume fraction is 55%,
(2) binding agent is consisting of PW:90%, EVA:0.5%, PP:8.5%, SA:1%, and its volume fraction is 45%, and melting temperature exists
120℃。
(3) being configured to binding agent in batch mixer according to binder formula, melting temperature is 135 DEG C, and the time is 2h.Then by former
Beginning powder and binding agent are by proper proportion, and mixing 3h in kneader, melting temperature is 160 DEG C.Be suitable to through granulation afterwards
The granular feeding (its granularity is 2mm) of injection；
(4) the uniform feeding of preparation is expelled to cooling forming after mold for heating at high temperature flowing；Wherein injection temperature is 1160 DEG C of scopes
In；Injection pressure 80MPa, injection speed is the injector system maximum injection speed of 55%, and the dwell time is 10s, mold temperature
Keep 40 DEG C.
(5) defat uses solvent degreasing+thermal debinding two step defat method.Solvent used by solvent degreasing is trichloro ethylene, and skimming temp is
36 DEG C, after solvent degreasing 4h, drying at room temperature 2h.Carrying out thermal debinding the most again, program is as follows:
(6) sintering above-mentioned defat rustless steel film rod finished product, sintering temperature, at 1400 DEG C, is incubated 2h, furnace cooling.
Embodiment five
The mould that the present embodiment is used is that to be coated with thickness in die cavity be 0.2mm layers of chrome, and the roughness Ra of its layers of chrome is
0.05-0.075um；
Its concrete preparation process is as follows:
(1) select metal dust be its size of 317L powder of stainless steel be 25 μm, volume fraction is 60%.
(2) binding agent is consisting of PW:80%, EVA:10%, PP:9%, SA:1%, and its volume fraction is 40%, and melting temperature is at 120 DEG C.
(3) being configured to binding agent in batch mixer according to binder formula, melting temperature is 135 DEG C, and the time is 2h.Then by former
Beginning powder and binding agent are by proper proportion, and mixing 3h in kneader, melting temperature is 160 DEG C.Be suitable to through granulation afterwards
The granular feeding (its granularity is 2.5mm) of injection；
(4) the uniform feeding of preparation is expelled to cooling forming after mold for heating at high temperature flowing；Wherein injection temperature is 180 DEG C of scopes
In；Injection pressure 120MPa, injection speed is the injector system maximum injection speed of 60%, and the dwell time is 10s, mould temperature
Degree keeps 40 DEG C.
(5) defat uses solvent degreasing+thermal debinding two step defat method.Solvent used by solvent degreasing is dichloromethane, and skimming temp is
36 DEG C, after solvent degreasing 4h, drying at room temperature 2h.Carrying out thermal debinding the most again, program is as follows:
(6) sintering above-mentioned defat rustless steel film rod finished product, sintering temperature, at 1360 DEG C, is incubated 3h, furnace cooling.
Claims (8)
1. the preparation method of a metal deposit rod, it is characterised in that comprise the steps:
Step one
The mould that design matches with film rod size, the cavity surface of described mould is uniformly plated with layers of chrome, described
The roughness Ra of layers of chrome is 0.05-0.2 μm；
Step 2
By volume percentage ratio,
Metal dust 55-65%；
Bonding agent 35-45%；
Join and take metal dust and bonding agent mix homogeneously, obtain feeding；
Described bonding agent includes following component by percentage to the quality:
Paraffin 75-90%；
Ethene-vinyl acetate copolymer 0.1-15%；
Polypropylene 0.1-20%；
Stearic acid 0.1-3%；
Step 3
Feeding is heated to 150-180 DEG C, with the injection pressure of 80-120Mpa, feeding is expelled in mould,
Pressurize after feeding fills up mould, cooling, the demoulding, the material base that must be sized；
Step 4
Material base is carried out ungrease treatment, after obtaining defat material base, sinters under protective atmosphere, obtain metal deposit
Rod；The temperature of described sintering is 1200-1400 DEG C.
The preparation method of a kind of metal deposit the most according to claim 1 rod, it is characterised in that: step one
Described in the thickness of layers of chrome be 0.1-0.25mm.
The preparation method of a kind of metal deposit the most according to claim 1 rod, it is characterised in that: step
Metal dust described in two is 304L powder of stainless steel or 317L powder of stainless steel；Its granularity≤40um.
The preparation method of a kind of metal deposit the most according to claim 1 rod, it is characterised in that: step
Bonding agent described in two includes following component by percentage to the quality:
Paraffin 75-85%；
Ethene-vinyl acetate copolymer 5-15%；
Polypropylene 5-15%；
Stearic acid 0.5-2%.
The preparation method of a kind of metal deposit the most according to claim 4 rod, it is characterised in that: step
In two, bonding agent is mixed homogeneously with metal dust and is realized by following step:
Join by the binder formula of design after taking each raw material, after 80-150 DEG C of mix homogeneously, the metal taken will be joined
Powder is added thereto, and is mixed evenly at 155-175 DEG C, pelletizes, obtains the feeding that granularity is 0.5-2.5mm.
The preparation method of a kind of metal deposit the most according to claim 1 rod, it is characterised in that: step
In four, described ungrease treatment includes that solvent degreasing processes and heating ungrease treatment successively；
Described solvent degreasing is processed as: at 20-50 DEG C, is immersed by material base in solvent after 2-4 hour, is dried,
Obtain the material base after solvent degreasing；When being dried, control temperature and be 20-40 DEG C；Described solvent selected from dichloromethane,
At least one in chloroform, normal heptane, trichloro ethylene；
Described thermal debinding is processed as: under protective atmosphere, puts in heating furnace by the material base after solvent degreasing,
It is first to heat to 180-220 DEG C with the heating rate of 2-5 DEG C/min, after being incubated 40-80 minute, then with
The heating rate of 1-3 DEG C/min is warming up to 360-415 DEG C, is incubated 40-80min, then with 1-3 DEG C/min's
Heating rate is warming up to 420-450 DEG C, is incubated 80-100min, then with the heating rate liter of 1-3 DEG C/min
Temperature, to 580-650 DEG C, is incubated 80-100min, and the heating rate of last 1-3 DEG C/min is warming up to 850-950 DEG C,
Insulation 1-2h, furnace cooling, obtain defat material base；Described protective atmosphere selected from hydrogen atmosphere, nitrogen atmosphere,
One in argon gas atmosphere.
The preparation method of a kind of metal deposit the most according to claim 1 rod, it is characterised in that: step
In four, the atmosphere of described sintering one in hydrogen atmosphere, nitrogen atmosphere, argon gas atmosphere；During sintering,
Control sintering time is 2-5h；After having sintered, cool to room temperature with the furnace, obtain finished product.
The preparation method of a kind of metal deposit the most according to claim 1 rod, it is characterised in that: made
The standby wet film that metal deposit rod energy coating thickness is 10 μm.
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| CN106474937B (en) * | 2016-11-28 | 2019-07-19 | 南京工业大学 | Firing Process of Porous Stainless Steel Membrane |
| CN107127337A (en) * | 2017-06-23 | 2017-09-05 | 昆山卡德姆新材料科技有限公司 | A kind of two-part degreasing method of powder injection molding shaping |
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| CN101288907A (en) * | 2007-04-19 | 2008-10-22 | 湖南英捷高科技有限责任公司 | Processing method of endoscope living body forceps head |
| CN101700573A (en) * | 2009-11-09 | 2010-05-05 | 浙江汇锦梯尔镀层科技有限公司 | Mold for molding magnetic material powder with high hardness and high wear resistance and manufacturing method thereof |
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| WO2012008234A1 (en) * | 2010-07-13 | 2012-01-19 | 平井工業株式会社 | Die and method for manufacturing same |
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