CN104001870B - Sand molding method penetrated by alnico magnet - Google Patents
Sand molding method penetrated by alnico magnet Download PDFInfo
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- CN104001870B CN104001870B CN201410128496.0A CN201410128496A CN104001870B CN 104001870 B CN104001870 B CN 104001870B CN 201410128496 A CN201410128496 A CN 201410128496A CN 104001870 B CN104001870 B CN 104001870B
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Abstract
The present invention relates to a kind of alnico magnet, especially relate to a kind of alnico magnet and penetrate sand molding method.It is relatively big that it mainly solves the labor intensity of operation when carrying out moulding of the pouring technology existing for prior art, the technical problem of the relatively low grade of production efficiency.The present invention selects purity quartzite, and powdered phenol-formaldehyde resin is adhesive, and hexamethylenamine is firming agent, mix homogeneously after purity quartzite, phenolic resin, hexamethylenamine are heated to 120-150 DEG C, forms precoated sand；Heating rod is installed in the heating arrangements of moulding mould, connects with the mains, heat up；After matched moulds, penetrate in the sand inlet that the sand-shooting head of sand machine enters into moulding mould, undertaken precoated sand penetrating the sand 3-10 second, sand-shooting head exits the sand inlet of moulding mould, then carrying out solidifying 1-5 minute, die sinking plunger tip, its step is automatically performed in order through computer programming, circulation performs, and finally produces alnico magnet casting sand mold.
Description
Technical field
The present invention relates to a kind of alnico magnet, especially relate to a kind of alnico magnet and penetrate sand molding method.
Background technology
Permanent magnet material has the highest Curie temperature (1133K) and low-down remanent magnetism reversible temperature coefficient (be better than one 0.02%/DEG C) among permanent magnet material, its operating temperature can arrive more than 873K, having very excellent temperature stability just because of it, in some accurate magnetic devices, (high-precision meter such as gyroscope and accelerometer, microwave tube, travelling-wave tube in inertial navigation system) is widely used.Chinese patent discloses a kind of aluminum one nickel one and bores permanent-magnet alloy vacuum-assist pouring Processes and apparatus (publication number: CN1107398A), it is using the parallel close-packed arrays of isometric porcelain tube as model, between pipe, gap molding sand bonding is enriched, put the porcelain tube assembled into vacuum pouring sandbox, surrounding molding sand tamps, put in preheating furnace and preheat, preheat temperature according to alloying component difference and control at 100-1000 DEG C, it is incubated 2-8 hour, take out sandbox and be connected in vacuum system, vacuum is made to reach 3 × 10-3 × 10 hour, molten alloy is poured into a mould from gate, gate is 70-100mm；A kind of alnico vacuum-assist pouring equipment, is mainly a vacuum pouring sandbox, and by gate, sand box cover, sandbox body, molding sand, bunchy porcelain tube, vacuum road, vacuum pipe, valve, vacuum meter is constituted；Funnelform sprue gate is arranged at gate top, sandbox is made up of case lid and casing, salable therebetween, box cavity right-hand member connects gate, and box cavity left end connects vacuum road, above connects vacuum system, it is equipped with valve and vacuum meter therebetween, assembling bundles of porcelain tube and be placed in the middle of sandbox, the molding sand of filling around, porcelain tube two terminates vacuum road and gate.But this pouring technology labor intensity of operation when carrying out moulding is relatively big, and production efficiency is relatively low.
Summary of the invention
The present invention is to provide a kind of alnico magnet and penetrates sand molding method, and it is relatively big that it mainly solves the labor intensity of operation when carrying out moulding of the pouring technology existing for prior art, the technical problem of the relatively low grade of production efficiency.
The above-mentioned technical problem of the present invention is addressed mainly by following technical proposals:
Sand molding method penetrated by a kind of alnico magnet of the present invention, it is characterised in that described method includes:
A. purity quartzite is selected, powdered phenol-formaldehyde resin is binding agent, hexamethylenamine is firming agent, mix homogeneously after purity quartzite, phenolic resin, hexamethylenamine are heated to 120-150 DEG C, form precoated sand, wherein phenolic resin weight accounts for the 4%-6% of purity quartzite weight, and the weight of hexamethylenamine accounts for the 20-30% into phenolic resin weight；
B. handle modeling mould is installed to and penetrates adjustment good position on sand machine, and the sand inlet alignment on mould frame penetrates the sand jet outlet on sand machine；
C. heating rod is installed in the heating arrangements of moulding mould, connects with the mains, heat up, mould temperature rise to 250-300 DEG C；
D. after matched moulds, penetrating in the sand inlet that the sand-shooting head of sand machine enters into moulding mould, undertaken precoated sand penetrating the sand 3-10 second, sand-shooting head exits the sand inlet of moulding mould, then carries out solidifying 1-5 minute, die sinking plunger tip, takes sand mold.Its step is automatically performed in order through computer programming, and circulation performs, and starts the cycle over from matched moulds, to only taking sand mold, has once circulated and has once produced, be i.e. cyclic production.Produce alnico magnet casting sand mold.
The formative technology of original Casting Al-Ni-Co Magnet is to adopt hand moulding.Namely 70-140 order quartz sand, furane resins, amine-oxides aqueous solution of urea are adopted, after three's ammonium ratio is at room temperature mixed, it is put in cold mold and pats consolidation with hands, be put on lifting platform in upset and shake the demoulding, after the demoulding, the sand mold not solidified is entered back into the baking kiln drying solidification of 180-250 degree Celsius.Not only labor intensity is big.Productivity ratio is low.And uncured with regard to molding, it is easy to causing mold cavity deformation, cause that casting dimension accuracy is low, sand mold intensity is low again, results in multiple casting flaw such as sand holes, pore etc..
The phenomenons such as the present invention crushes after encountering the demoulding difficulty sand mold demoulding in development process.In order to solve this problem, we adopt increase model and running gate system pattern draft, improve mould fineness with abrasive polishing process, to reduce ejection resistance.Play remarkable result.
As preferably, purity quartzite is 70-140 order, fine size, good fluidity, it is easy to molding sand filling, and the spray fineness after melting is good.SiO in purity quartzite2Content more than 99%, SiO2The more high molding sand refractoriness of content is more high, it is prevented that rough casting produces scab defect.
As preferably, adopting horizontal sandblasting when penetrating sand, the upper and lower molding single-station of horizontal direction is adopted to penetrate sand machine.Adopt horizontal sandblasting to be more beneficial for molding sand filling relative to vertical sandblasting, dead angle does not occur.The mould being more complicated also can put in place in filling.Play the effect of key in the present invention.
As preferably, described moulding mould includes frame, frame is provided with sand inlet, the product model of alnico magnet it is provided with in frame, product model top is provided with decking, product model is communicated with running gate system, running gate system connection sprue, sprue is positioned at the middle part of moulding mould, product model place is provided with heating arrangements, decking is connected to post rod mechanism, core ejection mechanism and return mechanism, and post rod mechanism, core ejection mechanism, return mechanism have numerical control device by connection, and numerical control device penetrates sand machine by connection.Can be automatically controlled by numerical control device and penetrate sand machine, push rod, return mechanism, so can so that core-shooting process be all automatically finished, Automatic Cycle.
As preferably, the power of described heating rod is 1.5KW.
Therefore, the present invention adopts automation mechanized operation flow process, improves the product quality of alnico magnet, improves work efficiency.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of structural representation of moulding mould of the present invention；
Accompanying drawing 2 is the cross-sectional view of Fig. 1.
Parts, position and numbering in figure: frame 1, sand inlet 2, product model 3, decking 4, running gate system 5, sprue 6, heating arrangements 7, post rod mechanism 8, core ejection mechanism 9, return mechanism 10.
Detailed description of the invention
By the examples below, and in conjunction with accompanying drawing, technical scheme is described in further detail.
Embodiment 1: sand molding method penetrated by a kind of alnico magnet of this example, the steps include:
A. the purity quartzite of 70-140 order, the SiO in purity quartzite are selected2Content is more than 99%, powdered phenol-formaldehyde resin is binding agent, hexamethylenamine is firming agent, mix homogeneously after purity quartzite, phenolic resin, hexamethylenamine are heated to 130 DEG C, form precoated sand, wherein purity quartzite weight is 100kg, and phenolic resin weight is 4kg, and hexamethylenamine weight is 0.8kg；
B. handle modeling mould is installed to and penetrates adjustment good position on sand machine, and the sand inlet alignment on mould frame penetrates the sand jet outlet on sand machine；
C. 1.5KW heating rod is installed in the heating arrangements of moulding mould, connect with the mains, heat up, mould temperature rise to 260 DEG C, wherein moulding mould such as Fig. 1, Fig. 2, include frame 1, frame is provided with sand inlet 2, the product model 3 of alnico magnet it is provided with in frame, product model top is provided with decking 4, product model is communicated with running gate system 5, running gate system connection sprue 6, sprue is positioned at the middle part of moulding mould, product model place is provided with heating arrangements 7, decking is connected to post rod mechanism 8, core ejection mechanism 9 and return mechanism 10, post rod mechanism, core ejection mechanism, return mechanism has numerical control device by connection, numerical control device penetrates sand machine by connection；
D., after matched moulds, the sand-shooting head that the upper and lower molding single-station of horizontal direction penetrates sand machine enters in the sand inlet of moulding mould, is undertaken penetrating sand by precoated sand, 5 seconds, penetrating sand and adopt horizontal sandblasting, sand-shooting head exits the sand inlet of moulding mould, then solidifies, 2 minutes, die sinking plunger tip, take sand mold.Its step is automatically performed in order through computer programming, and circulation performs, and starts the cycle over from matched moulds, to only taking sand mold.Once circulate and once produced, be i.e. cyclic production, finally produced alnico magnet casting sand mold.
Embodiment 2: sand molding method penetrated by a kind of alnico magnet of this example, the steps include:
A. the purity quartzite of 70-140 order, the SiO in purity quartzite are selected2Content is more than 99%, and powdered phenol-formaldehyde resin is binding agent, and hexamethylenamine is firming agent, mix homogeneously after purity quartzite, phenolic resin, hexamethylenamine are heated to 140 DEG C, forms precoated sand, and wherein purity quartzite weight is 100kg, phenolic resin weight is 5kg, and hexamethylenamine weight is 1kg；
B. handle modeling mould is installed to and penetrates adjustment good position on sand machine, and the sand inlet alignment on mould frame penetrates the sand jet outlet on sand machine；
C. 1.5KW heating rod is installed in the heating arrangements of moulding mould, connect with the mains, heat up, mould temperature rise to 280 DEG C, wherein moulding mould such as Fig. 1, Fig. 2, include frame 1, frame is provided with sand inlet 2, the product model 3 of alnico magnet it is provided with in frame, product model top is provided with decking 4, product model is communicated with running gate system 5, running gate system connection sprue 6, sprue is positioned at the middle part of moulding mould, product model place is provided with heating arrangements 7, decking is connected to post rod mechanism 8, core ejection mechanism 9 and return mechanism 10, post rod mechanism, core ejection mechanism, return mechanism has numerical control device by connection, numerical control device penetrates sand machine by connection；
D., after matched moulds, the sand-shooting head that the upper and lower molding single-station of horizontal direction penetrates sand machine enters in the sand inlet of moulding mould, is undertaken penetrating sand 6 seconds by precoated sand, penetrating sand and adopt horizontal sandblasting, sand-shooting head exits the sand inlet of moulding mould, then carries out solidifying 3 minutes, die sinking plunger tip, takes sand mold.Its step is automatically performed in order through computer programming, and circulation performs, and starts the cycle over from matched moulds, to only taking sand mold, has once circulated and has once produced, be i.e. cyclic production, finally produced alnico magnet casting sand mold.
Embodiment 3: sand molding method penetrated by a kind of alnico magnet of this example, the steps include:
A. the purity quartzite of 70-140 order, the SiO in purity quartzite are selected2Content is more than 99%, powdered phenol-formaldehyde resin is binding agent, hexamethylenamine is firming agent, mix homogeneously after purity quartzite, phenolic resin, hexamethylenamine are heated to 150 DEG C, form precoated sand, wherein purity quartzite weight is 100kg, and phenolic resin weight is 6kg, and hexamethylenamine weight is 1.8kg；
B. handle modeling mould is installed to and penetrates adjustment good position on sand machine, and the sand inlet alignment on mould frame penetrates the sand jet outlet on sand machine；
C. 1.5KW heating rod is installed in the heating arrangements of moulding mould, connect with the mains, heat up, mould temperature rise to 290 DEG C, wherein moulding mould such as Fig. 1, Fig. 2, include frame 1, frame is provided with sand inlet 2, the product model 3 of alnico magnet it is provided with in frame, product model top is provided with decking 4, product model is communicated with running gate system 5, running gate system connection sprue 6, sprue is positioned at the middle part of moulding mould, product model place is provided with heating arrangements 7, decking is connected to post rod mechanism 8, core ejection mechanism 9 and return mechanism 10, post rod mechanism, core ejection mechanism, return mechanism has numerical control device by connection, numerical control device penetrates sand machine by connection；
D., after matched moulds, the sand-shooting head that the upper and lower molding single-station of horizontal direction penetrates sand machine enters in the sand inlet of moulding mould, is undertaken penetrating sand 8 seconds by precoated sand, penetrating sand and adopt horizontal sandblasting, sand-shooting head exits the sand inlet of moulding mould, then carries out solidifying 4 minutes, die sinking plunger tip, takes sand mold.Its step is automatically performed in order through computer programming, and circulation performs, and starts the cycle over from matched moulds, to only taking sand mold.Once circulate and once produced, be i.e. cyclic production, finally produced alnico magnet casting sand mold.
The foregoing is only specific embodiments of the invention, but the architectural feature of the present invention is not limited thereto, any those skilled in the art is in the field of the invention, and change or the modification made all are encompassed among the scope of the claims of the present invention.
Claims (1)
1. sand molding method penetrated by an alnico magnet, it is characterised in that described method includes:
A. purity quartzite is selected, powdered phenol-formaldehyde resin is binding agent, hexamethylenamine is firming agent, mix homogeneously after purity quartzite, phenolic resin, hexamethylenamine are heated to 120-150 DEG C, forming precoated sand, wherein phenolic resin weight accounts for the 4%-6% of purity quartzite weight, and the weight of hexamethylenamine accounts for the 20-30% into phenolic resin weight, purity quartzite is 70-140 order, the SiO in purity quartzite2Content is more than 99%；
B. handle modeling mould is installed to and penetrates adjustment good position on sand machine, and the sand inlet alignment on mould frame penetrates the sand jet outlet on sand machine；
C. heating rod being installed in the heating arrangements of moulding mould, the power of heating rod is 1.5KW, connects with the mains, and heats up, mould temperature rise to 250-300 DEG C；
D. after matched moulds, penetrate in the sand inlet that the sand-shooting head of sand machine enters into moulding mould, moulding mould includes frame (1), frame is provided with sand inlet (2), the product model (3) of alnico magnet it is provided with in frame, product model top is provided with decking (4), product model is communicated with running gate system (5), running gate system connection sprue (6), sprue is positioned at the middle part of moulding mould, product model place is provided with heating arrangements (7), decking is connected to post rod mechanism (8), core ejection mechanism (9) and return mechanism (10), post rod mechanism, core ejection mechanism, return mechanism has numerical control device by connection, numerical control device penetrates sand machine by connection, undertaken precoated sand penetrating the sand 3-10 second, horizontal sandblasting is adopted when penetrating sand, the upper and lower molding single-station of horizontal direction is adopted to penetrate sand machine, sand-shooting head exits the sand inlet of moulding mould, then carry out solidifying 1-5 minute, die sinking plunger tip, take sand mold, its step is automatically performed in order through computer programming, start the cycle over from matched moulds, to only taking sand mold, once circulate and once produced, i.e. cyclic production, finally produce alnico magnet casting sand mold.
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| CN201410128496.0A CN104001870B (en) | 2014-04-02 | 2014-04-02 | Sand molding method penetrated by alnico magnet |
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| CN104399900A (en) * | 2014-11-25 | 2015-03-11 | 宁波工程学院 | Sand core fixing method, method for assembling sand core with mould, and preparation method for casting piece with special-shaped cavity and special-shaped hole |
| CN105506468B (en) * | 2015-12-21 | 2017-07-25 | 宁波金汇精密铸造有限公司 | The preparation method of buffer |
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| GB658544A (en) * | 1948-12-09 | 1951-10-10 | Fischer Ag Georg | Improved sand-moulding machines |
| CN1519069A (en) * | 2003-09-01 | 2004-08-11 | 董立春 | Method for manufacturing cast-iron radiator without sand inside cavity |
| CN101249547A (en) * | 2008-03-24 | 2008-08-27 | 山东时风（集团）有限责任公司 | Tooth form part foundry technique method |
| CN102699280A (en) * | 2012-06-30 | 2012-10-03 | 南车戚墅堰机车车辆工艺研究所有限公司 | Sand mould of precoated sand for casting single piston ring and manufacturing method of sand mould |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102107261A (en) * | 2009-12-23 | 2011-06-29 | 天津市盛兴祥机械制造有限公司 | Production technology for casting brake disk air channel with pre-coated sand core method |
| CN203076538U (en) * | 2012-12-26 | 2013-07-24 | 重庆市卓航再生资源回收有限公司 | Core shooter |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB658544A (en) * | 1948-12-09 | 1951-10-10 | Fischer Ag Georg | Improved sand-moulding machines |
| CN1519069A (en) * | 2003-09-01 | 2004-08-11 | 董立春 | Method for manufacturing cast-iron radiator without sand inside cavity |
| CN101249547A (en) * | 2008-03-24 | 2008-08-27 | 山东时风（集团）有限责任公司 | Tooth form part foundry technique method |
| CN102699280A (en) * | 2012-06-30 | 2012-10-03 | 南车戚墅堰机车车辆工艺研究所有限公司 | Sand mould of precoated sand for casting single piston ring and manufacturing method of sand mould |
Non-Patent Citations (1)
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| 热(冷)芯盒结构的优化设计;刘文川等;《铸造》;20050822;第54卷(第8期);第811-814页 * |
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Address after: Lin Pu Zhen Meng Village Xiaoshan District of Hangzhou City, Zhejiang province 311215 Patentee after: Hangzhou Zhijiang Magnetic Industry Co., Ltd. Address before: A branch of Hangzhou city in Zhejiang province 311215 Xiaoshan Qianjiang farm 73021 troops on the west side Patentee before: Hangzhou Xiaoshan Zhijiang Magnet Co., Ltd. |