CN103882362B - A kind of master mold for low-melting-point metal electric arc spraying mould is prepared and release method - Google Patents
A kind of master mold for low-melting-point metal electric arc spraying mould is prepared and release method Download PDFInfo
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- CN103882362B CN103882362B CN201410102752.9A CN201410102752A CN103882362B CN 103882362 B CN103882362 B CN 103882362B CN 201410102752 A CN201410102752 A CN 201410102752A CN 103882362 B CN103882362 B CN 103882362B
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Abstract
The invention discloses a kind of master mold for low-melting-point metal electric arc spraying mould to prepare and release method, including: by heating paraffin to molten state, add stearic acid or polyethylene and staple glass silk to it, stir, obtain modified paraffin；Modified paraffin is poured in die size peripheral frame, remove peripheral frame after cured, obtain modified paraffin master mold；Modified paraffin master mold is carried out machining, obtains required spraying profile；The modified paraffin master tool surface with spraying profile is carried out roughening treatment, obtains mould mother plate substrate；Mould mother plate substrate is sprayed, the mould mother plate substrate heating after having sprayed is poured out to modified paraffin molten condition, it is achieved the demoulding between master mold and spraying shell.Spraying master mold machinability prepared by the present invention is good, and convenient manufacturing process is simple, the mode of heating can be adopted to be disengaged by the spraying shell after itself and spraying rapidly, do not injure spraying shell surface simultaneously, saved the demoulding time, reduced demoulding difficulty.
Description
[technical field]
The present invention relates to low-melting-point metal electric arc spraying Rapid Tooling Manufacturing Technology, prepare and release method particularly to a kind of master mold for low-melting-point metal electric arc spraying mould.
[background technology]
Along with the further integration of global economy, manufacturing industry competition seems fierce all the more.How to shorten the production cycle and reduce cost, the problem of Cheng Liao manufacturer overriding concern.The progressively arriving in multi-varieties and small-batch epoch makes enterprise requirements Making mold can guarantee that new product quickly dominates the market, exploitation rapid economic die increasingly causes the attention of people, such as with epoxy, polyester or the quick soft mode being wherein mixed into the reinforcing material making such as metal, pottery, glass, can be used for up to a hundred injection moldeds and automobile panel trial-production.It is mainly characterized by, and manufacturing process is simple, with short production cycle, low price.But owing to heat conductivity and the mechanical performance of material are not high, this mould is difficult to use in high-frequency batch injection molded and metal drawn component batch shapes.Occurring in that the new technology of a kind of quickly manufacturing mould in recent years, it is different from over the low-cost die carried, but a kind of brand-new method.Rapid Tooling Manufacturing Technology (RapidTooling is called for short RT) refers to, by quick shaping process and corresponding following process, carry out quickly making mould.Rapid Tooling Manufacturing Technology can be generally divided into direct Rapid tooling and the indirect big class of Rapid tooling two.Namely electric arc spraying fast mould belongs to the one of indirect fast mould.
Plasma spray technology (ThermalSprayingTechnology) was invented by Mr. M.U.Shoop of Switzerland in 1909, was the important component part of Surface Technics.One as heat spraying method, arc spraying technology is exactly as self-extinguishing electrode using two one metal wire materials, the electric arc that two one metal wire end short circuits produce is utilized to make a material fusing, use compression gas that molten metal is atomized into micro-molten drop simultaneously, and make it accelerate, with significantly high deposition rate to matrix surface thus forming a kind of technique of coating.Other heat spraying method relatively, arc spraying technology has the advantages such as spraying coating process is flexible, heat utilization rate is high, life-span length, efficiency high, can prepare pseudo alloy coating easily, safety is good.Its application is mainly reflected in long-effective corrosion, maintenance and the aspect such as surface modification, rapid die-manufacturing.
Metal arc spraying rapid die-manufacturing technology is a kind of mold making technology based on " duplication ", it is using a mock-up (or being called prototype) as master mold, by the method for electric arc spraying at the certain thickness compact metal coating of master tool surface formation of deposits, i.e. mould shell.The mould shell exact copies shape of prototype, it is thus achieved that required mold cavity, after completing the aftertreatment technologys such as reinforcement, the demoulding, polishing, can complete the quick manufacture of mould.From product drawing to production, centre includes the links such as mould structure design, manufacture, detection, assembling, die trial.Electric arc spraying fast mould mould making process idiographic flow is: obtain die structure dwg by mould structure design, from die structure dwg, die face figure is proposed, need adding technology to supplement face according to spraying coating process and process structure obtains pattern diagram, matrix master mold surface treatment is prepared according to pattern diagram, certain thickness mould shell is deposited at matrix surface by the method for electric arc spraying, shell accurately replicates matrix profile, add window frame structure at the shell back side and fill back lining materials, after back lining materials solidifies, remove master mold and clear up die face, simple and fast mould can be obtained after post processing, after assembling with steel construction assembling, get final product die trial.Compared with traditional steel mold manufacture, metal spraying by electric arc mold making technology has the advantages such as fast, with short production cycle, the low cost of manufacture of molding speed, also has certain die life simultaneously, becomes the important channel of new product development and small lot batch manufacture.
Depending entirely on master mold due to the cavity dimension of electric arc spraying fast mould, geometric accuracy etc., the quality of sprayed coating and master mold also have close relationship.Ideally, spraying mold will have same shape and precision with master mold, and master mold is prone to cleaning and removes, it is preferred to can reach the environment protecting that repetitive cycling utilizes.Therefore, master mold is produced in electric arc spraying technology for quickly manufacturing models process has consequence and effect, is premise and the basis of molding.
For low-melting-point metal Arc Spraying Tooling technology, as sprayed aluminum, zinc, allumen etc., adoptable master mold material category is more, currently mainly there are rapid prototyping resin piece, gypsum material and medium-density plate etc., but resin piece is yielding, need to carrying out extra support reinforcing, technique is more complicated, relatively costly；Gypsum material and medium-density plate are less costly, obtain last profile by machining, but lathe metal is had corrosivity, the service life of serious threat lathe by Gypsum Fibrosum；Simultaneously as die face is complicated, the cure shrinkage of spraying shell makes this three classes material at present all there is the problem of demoulding difficulty, and belongs to the destructive demoulding, and master mold material can not reuse.Artificial removal's master mold is wasted time and energy, also easily injure profile during misoperation, therefore, study the master mold preparation being suitable for the low-melting-point metal convenient demoulding of electric arc spraying fast mould and release method is to improve metal arc spraying rapid die-manufacturing efficiency, reduce cost, it is achieved the problem that the feature of environmental protection need solve.
[summary of the invention]
It is an object of the invention to provide a kind of master mold for low-melting-point metal electric arc spraying mould to prepare and release method, the method can realize the convenient demoulding of low-melting-point metal electric arc spraying mould, and its environmental protection reusable edible.
For reaching above-mentioned purpose, the present invention adopts the following technical scheme that and is achieved:
A kind of master mold for low-melting-point metal electric arc spraying mould is prepared and release method, comprises the steps:
1) it is stearic acid or the polyethylene of 0.5～20% by mass percentage, is not more than the staple glass silk of 2% and all the other are for middle fire stons wax, weigh stearic acid or polyethylene, staple glass silk and middle fire stons wax respectively, standby, wherein, the length of staple glass silk is 3～5mm；
2) by heating paraffin to molten state, add stearic acid or polyethylene and staple glass silk to it, stir, obtain modified paraffin；
3) by step 2) in the modified paraffin that configured pour in die size peripheral frame, remove peripheral frame after cured, obtain modified paraffin master mold, wherein, master mold blank leaves the allowance being not more than 10mm；
4) modified paraffin master mold is carried out machining, obtain required spraying profile；
5) the modified paraffin master tool surface with spraying profile is carried out roughening treatment, obtain mould mother plate substrate；
6) mould mother plate substrate is carried out low-melting-point metal electric arc spraying, the mould mother plate substrate heating after having sprayed is poured out to modified paraffin molten condition, it is achieved the demoulding between master mold and spraying shell.
The present invention further improvement is that: middle temperature melting point of paraffin wax is be more than or equal to 70 degree.
The present invention further improvement is that: step 2) in, add in paraffin after stearic acid or polyethylene are added heat fusing.
The present invention further improvement is that: in step 3), follows closely molding jig size peripheral frame with wooden frame according to die needed size, and it is in order to obtain overall master mold blank.
The present invention further improvement is that: in step 4), and modified paraffin master mold is carried out machining, obtains required spraying profile.
The present invention further improvement is that: in step 5), includes using coarse sand cloth polishing surface to the method for modified paraffin master tool surface roughening treatment, or adopts cutting modified paraffin master tool surface.
The present invention further improvement is that: in step 5), and after modified paraffin master tool surface roughening treatment, its surface roughness is Ra5～Ra15.
The present invention further improvement is that: in step 6), first the modified paraffin of the middle part of mould mother plate substrate is carried out destruction and roots out, then the heating of all the other modified paraffins is poured out to its molten condition.
The present invention further improvement is that: adopts hot water or heater to make modified paraffin melt.
The present invention further improvement is that: after the spraying shell sprayed is added backing, the mould mother plate substrate heating after having sprayed is poured out to modified paraffin molten condition, it is achieved the demoulding between master mold and spraying shell.
Modified paraffin materials application in low-melting-point metal electric arc spraying technology for quickly manufacturing models, compared with the mother plate substrate such as existing rapid prototype component, Gypsum Fibrosum and medium-density plate, is used the mother plate substrate that the present invention makes to have the advantage that by the present invention
1, the modified paraffin of the present invention can add thermocoagulation repeatedly, and recycling, relative cost is low, environment friendly and pollution-free；
2, available boiling water heating makes modified paraffin melt, and cold curing, energy consumption is little, and manufacturing process is simple, easy to operate, and the manufacturing cycle is short；
3, mould mother plate substrate easily departs from spraying shell, people is freed from the demoulding work wasted time and energy, and does not injure spraying Surface Quality of Mould Shell；
4, raw material sources of the present invention are extensive, easily obtain.
[accompanying drawing explanation]
Fig. 1 to Fig. 4 is metal arc spraying rapid die-manufacturing technological process, and wherein, Fig. 1 is prepared by master mold；Fig. 2 is metal spraying Shell Preparation process；Fig. 3 is interpolation backing after the metal shell sprayed；Master mold is removed to form final metal spraying by electric arc mould by Fig. 4.
Wherein: 1 is master mold, 2 is spray gun, and 3 is metal spraying shell, and 4 is peripheral frame, and 5 is backing.
[detailed description of the invention]
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
Referring to Fig. 1 to Fig. 4, for metal arc spraying rapid die-manufacturing technological process, wherein, Fig. 1 is prepared by master mold 1, prepares including master mold blank and processes and surface coarsening；Fig. 2 is metal spraying shell 3 preparation process, mainly with spray gun 2, the metal spraying after atomization to treated master mold 1 surface is formed metal spraying shell 3；Fig. 3 is interpolation backing 5 after the metal shell sprayed, to realize the enhancing of its mechanical property；Master mold 1 is removed to form final metal spraying by electric arc mould by Fig. 4, and in Fig. 3 and 4, sequence number 4 represents peripheral frame.Present invention is generally directed to the master mold in whole metal spraying by electric arc mould making process flow process and prepare (as shown in Figure 1) and master mold demoulding part (as shown in Figure 4).
A kind of master mold for low-melting-point metal electric arc spraying mould of the present invention is prepared and release method, comprises the steps:
1) it is stearic acid or the polyethylene of 0.5～20% by mass percentage, is not more than the staple glass silk of 2% and all the other are for middle fire stons wax, weigh stearic acid or polyethylene, staple glass silk and middle fire stons wax respectively, standby, wherein, middle temperature melting point of paraffin wax is be more than or equal to 70 degree, and the length of staple glass silk is 3～5mm；
2) by heating paraffin to molten state, add stearic acid or polyethylene and staple glass silk to it, stir, obtain modified paraffin, wherein, add in paraffin after stearic acid or polyethylene are added heat fusing；
3) by step 2) in the modified paraffin that configured pour in die size peripheral frame, remove peripheral frame after cured, obtain modified paraffin master mold, wherein, master mold blank leaves the allowance being not more than 10mm, adopts wooden frame to follow closely molding jig size peripheral frame according to die needed size；
4) modified paraffin master mold is carried out machining, obtain required spraying profile；
5) the modified paraffin master tool surface with spraying profile is carried out roughening treatment, obtain mould mother plate substrate；
6) mould mother plate substrate is carried out low-melting-point metal electric arc spraying; after the spraying shell sprayed is added backing; pour out after melted for the mould mother plate substrate heating after having sprayed to modified paraffin; realize the demoulding between master mold and spraying shell; wherein, include using coarse sand cloth polishing surface to the method for modified paraffin master tool surface roughening treatment, or adopt cutting modified paraffin master tool surface; after modified paraffin master tool surface roughening treatment, its surface roughness is Ra5～Ra15.
Above-mentioned steps 6) in, it is also possible to first the modified paraffin of the middle part of mould mother plate substrate is carried out destruction and roots out, then to the heating of all the other modified paraffins to its melted after pour out, wherein, hot water can be adopted to make modified paraffin melt.
Embodiment 1:
Make certain vehicle cladding element punch mould master mold, be of a size of: 800mm × 600mm × 150mm.
Comprise the following steps that
1) paraffin modification: with middle fire stons wax 162 for raw material base material, is material modified with stearic acid and length for 3mm staple glass silk, each use raw material mass percent be: stearic acid 10%, length is 3mm staple glass silk 1%, and all the other are middle fire stons wax 162；
2) stir: first middle fire stons wax 162 firing equipment is heated to 90 degree of fusings, be added thereto to stearic acid and the staple glass silk of fusing, stir, observe few bubble-free and glass fiber distribution uniform, obtain modified paraffin；
3) follow closely peripheral frame processed: master mold size will be needed somewhat to amplify, in order to leave enough processing and spraying surplus, follow closely system 820 × 620 × 155mm peripheral frame according to die size, and under peripheral frame, place lifting with supporting support；
4) modified paraffin configured is poured in this peripheral frame, after cold curing, remove peripheral frame；
5) modified paraffin master mold is carried out machining, obtain required spraying profile；
6) adopt coarse sand cloth or crude steel brush that master tool surface is carried out roughening treatment, obtain being suitable for the surface roughness requirements of spraying；
7) obtain mould mother plate substrate, send into and carry out low-melting-point metal electric arc spraying between spraying；
8) increasing having sprayed with steel plate around the master mold after adding backing, pour out and be placed in special container, deposit after solidification after melting with boiling water, when waiting need to make new master mold next time, re-melting uses.
Embodiment 2:
Make certain vehicle cladding element punch mould master mold, be of a size of: 1000mm × 800mm × 200mm.
Comprise the following steps that
1) paraffin modification: with middle fire stons wax 162 for raw material base material, is material modified with polyethylene and length for 3mm staple glass silk, each use raw material mass percent be: polyethylene 10%, length is 3mm staple glass silk 1%, and all the other are middle fire stons wax 162；
2) stir: first middle fire stons wax 162 firing equipment is heated to 90 degree of fusings, be added thereto to polyethylene and the staple glass silk of fusing, stir, observe few bubble-free and glass fiber distribution uniform, obtain modified paraffin；
3) follow closely peripheral frame processed: master mold size will be needed somewhat to amplify, in order to leave enough processing and spraying surplus, follow closely system 1020 × 820 × 205mm peripheral frame according to die size, and under peripheral frame, place lifting with supporting support；
4) modified paraffin configured is poured in this peripheral frame, after cold curing, remove peripheral frame；
5) modified paraffin master mold is carried out machining, obtain required spraying profile；
7) adopt coarse sand cloth or crude steel brush that master tool surface is carried out roughening treatment, obtain being suitable for the surface roughness requirements of spraying；
8) obtain mould mother plate substrate, send into and carry out low-melting-point metal electric arc spraying between spraying；
9) increase having sprayed with steel plate around the master mold after adding backing, be placed in baking oven, when heating is to 90 degree, modified paraffin is in melting shape, pours out and is placed in special container, deposit after solidification from baking oven after taking out, when needing to make new master mold Deng next time, re-melting uses.
In sum, principles of the invention is to utilize low-melting-point metal spraying atomizing particle to arrive temperature relatively low feature time on mother plate substrate, adopts simple fusible material, it is achieved fast demoulding efficient, laborsaving.The paraffin modification material adopted, improve the intensity of paraffin, the spray pressure in spraying process can be born and deform the pulling force caused, and in spraying process, surface can tolerate the temperature of sprayed particle, namely fusible under boiling water state, at room temperature curable again, and then iterative cycles utilizes, there is environment friendly and pollution-free characteristic.Therefore, the present invention promotes a kind of breakthrough method of low-melting-point metal electric arc spraying fast mould application, take into account efficient, economy and the feature of environmental protection, and ensure that spraying shell does not have the surface quality problems being likely to be caused by misoperation in knockout course.
Above content is further description the inventive method made in conjunction with concrete preferred implementation; it cannot be assumed that the detailed description of the invention of the inventive method is only limitted to this; for the inventive method person of an ordinary skill in the technical field; under the premise conceived without departing from the inventive method; some simple deduction or replace can also be made, all should be considered as belonging to the inventive method and be determined scope of patent protection by submitted claims.
Claims (8)
1. the master mold preparation for low-melting-point metal electric arc spraying mould and release method, it is characterised in that comprise the steps:
1) it is stearic acid or the polyethylene of 0.5～20% by mass percentage, is not more than the staple glass silk of 2% and all the other are for middle fire stons wax, weigh stearic acid or polyethylene, staple glass silk and middle fire stons wax respectively, standby, wherein, the length of staple glass silk is 3～5mm, and middle temperature melting point of paraffin wax is be more than or equal to 70 degree；
2) by heating paraffin to molten state, add stearic acid or polyethylene and staple glass silk to it, stir, obtain modified paraffin；
3) by step 2) in the modified paraffin that configured pour in die size peripheral frame, remove peripheral frame after cured, obtain modified paraffin master mold, wherein, master mold blank leaves the allowance being not more than 10mm；
4) modified paraffin master mold is carried out machining, obtain required spraying profile；
5) the modified paraffin master tool surface with spraying profile being carried out roughening treatment, obtain mould mother plate substrate, wherein, after modified paraffin master tool surface roughening treatment, its surface roughness is Ra5～Ra15；
6) mould mother plate substrate is carried out low-melting-point metal electric arc spraying, the mould mother plate substrate heating after having sprayed is poured out to modified paraffin molten condition, it is achieved the demoulding between master mold and spraying shell.
2. a kind of master mold for low-melting-point metal electric arc spraying mould according to claim 1 is prepared and release method, it is characterised in that: step 2) in, add in paraffin after stearic acid or polyethylene are added heat fusing.
3. a kind of master mold for low-melting-point metal electric arc spraying mould according to claim 1 is prepared and release method, it is characterised in that: step 3) in, follow closely molding jig size peripheral frame with wooden frame according to die needed size, it is in order to obtain overall master mold blank.
4. a kind of master mold for low-melting-point metal electric arc spraying mould according to claim 1 is prepared and release method, it is characterised in that: step 4) in, modified paraffin master mold is carried out machining, obtains required spraying profile.
5. a kind of master mold for low-melting-point metal electric arc spraying mould according to claim 1 is prepared and release method, it is characterized in that: step 5) in, include using coarse sand cloth polishing surface to the method for modified paraffin master tool surface roughening treatment, or adopt cutting modified paraffin master tool surface.
6. a kind of master mold for low-melting-point metal electric arc spraying mould according to claim 1 is prepared and release method; it is characterized in that: step 6) in; first the modified paraffin of the middle part of mould mother plate substrate is carried out destruction to root out, then the heating of all the other modified paraffins is poured out to its molten condition.
7. a kind of master mold for low-melting-point metal electric arc spraying mould according to claim 1 or 6 is prepared and release method, it is characterised in that: adopt hot water or heater to make modified paraffin melt.
8. a kind of master mold for low-melting-point metal electric arc spraying mould according to claim 1 is prepared and release method; it is characterized in that: step 6) in; after the spraying shell sprayed is added backing; mould mother plate substrate heating after having sprayed is poured out to modified paraffin molten condition, it is achieved the demoulding between master mold and spraying shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102752.9A CN103882362B (en) | 2014-03-19 | 2014-03-19 | A kind of master mold for low-melting-point metal electric arc spraying mould is prepared and release method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102752.9A CN103882362B (en) | 2014-03-19 | 2014-03-19 | A kind of master mold for low-melting-point metal electric arc spraying mould is prepared and release method |
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| CN103882362A CN103882362A (en) | 2014-06-25 |
| CN103882362B true CN103882362B (en) | 2016-07-06 |
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| CN108607996B (en) * | 2018-07-27 | 2021-01-05 | 共享智能铸造产业创新中心有限公司 | Arc spraying equipment applied to 3D printing technology |
| CN114032491A (en) * | 2021-10-27 | 2022-02-11 | 湖南绿生永固新材料有限公司 | Demoulding oil-free mould frame surface metal spraying method |
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| CN1554524A (en) * | 2003-12-26 | 2004-12-15 | 四川东方绝缘材料股份有限公司 | Method for preparing demolding agent for roducing epoxy glass fibre reinforced plastic composite material |
| CN101787511A (en) * | 2010-04-02 | 2010-07-28 | 沈阳工业大学 | Quick method for producing rotational moulding moulds by adoption of thermal spray technology |
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2014
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1554524A (en) * | 2003-12-26 | 2004-12-15 | 四川东方绝缘材料股份有限公司 | Method for preparing demolding agent for roducing epoxy glass fibre reinforced plastic composite material |
| CN101787511A (en) * | 2010-04-02 | 2010-07-28 | 沈阳工业大学 | Quick method for producing rotational moulding moulds by adoption of thermal spray technology |
Non-Patent Citations (2)
| Title |
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| 基于电弧喷涂和电刷镀的快速制模技术;何仲赟;《模具工业》;20031231;第43页右栏第1段至第44页右栏最后一段 * |
| 塑料加工中的简单模具;常尾;《塑料时代》;19850830;第21页左栏第3段至第24页左栏第2段 * |
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