CN110014131A - A kind of semi-solid magnesium alloy high pressure injection molding - Google Patents
A kind of semi-solid magnesium alloy high pressure injection molding Download PDFInfo
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- CN110014131A CN110014131A CN201910384307.9A CN201910384307A CN110014131A CN 110014131 A CN110014131 A CN 110014131A CN 201910384307 A CN201910384307 A CN 201910384307A CN 110014131 A CN110014131 A CN 110014131A
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- Prior art keywords
- magnesium alloy
- semi
- high pressure
- barrel
- solid magnesium
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/007—Semi-solid pressure die casting
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention belongs to materials processing technology fields, are related to a kind of semi-solid magnesium alloy high pressure injection molding.The moulding process, comprising: 1. molds heating；2. being sent into material；3. barrel heats；4. melting materialss；5. ejection formation；6. retracting cooling；7. cyclic process.The moulding process, technical process is fastidious, accurate, and can make that molding product size is more acurrate, surface is more smooth, quality is more stable, also processable more complicated magnesium alloy workpiece.
Description
Technical field
The invention belongs to materials processing technology fields, are related to a kind of semi-solid magnesium alloy high pressure injection molding.
Background technique
Magnesium alloy is the alloy material that a kind of density is small, intensity is high, rapid heat dissipation, elasticity modulus are big, while also being had good
Absorb shock resistance, alkali resistance, impact resistance；Magnesium alloy mainly based on magnesium metal, add other alloying elements (such as aluminium,
Zinc, manganese, cerium, thorium and a small amount of zirconium or cadmium etc.) it is process；Existing magnesium alloy product is widely used in communications and transportation, aviation boat
It, the fields such as military product, daily necessity.
Traditional magnesium alloy molded modes are die cast, however the molding mode there are shaping speeds slow, processing efficiency
It is low, be also easy to produce the defects of hole.For such situation, now also there is the process principle based on injection-moulding plastic and being directed to for researching and developing
The injection molding of magnesium alloy, however to still have poor dimensional precision, surface flatness low for the product of the technique machine-shaping
And many defects such as can not process complex part, limit the popularization and application and continuous development of magnesium alloy product.
Summary of the invention
The purpose of the present invention is to provide a kind of semi-solid magnesium alloy high pressure injection moldings, and technical process is fastidious, at
The product size of type is more stable, surface is more smooth.
The technical solution of present invention solution above-mentioned technical problem are as follows:
A kind of semi-solid magnesium alloy high pressure injection molding, includes the following steps:
(1) mold heats: mold used in product to be formed is heated；Wherein, the temperature of mold heating is 345
DEG C~355 DEG C；Mold is heated by the heating device being arranged in mold, the heating method of heating device adds for high temperature oil
Heat.
(2) it is sent into material: will be sent into barrel by the solid Magnesium Alloy of metering weighing by feeding port.
(3) barrel heats: being heated barrel by the heating device being wrapped in outside barrel；Wherein, the temperature of barrel heating
It is 345 DEG C~355 DEG C, the heating method of used heating device is that electromagnetic induction heating, resistance heating or heat carrier add
Heat.
(4) melting materialss: solid Magnesium Alloy pushes under the rotation for the screw rod being located in barrel to nozzle direction, and constantly
It cut, melted, until being molten into semi-solid magnesium alloy when reaching at nozzle.
(5) ejection formation: screw rod is pushed to nozzle direction by high pressure ejecting device, semi-solid magnesium alloy is made to pass through spray
Mouth is projected to the die cavity of mold, is opened, takes out, is cooled down again after molding, and magnesium alloy product is obtained；Wherein, semi-solid magnesium alloy
The speed of injection nozzle is 5m/s~7m/s.
(6) cooling is retracted: by cooling device that barrel is cooling during screw retreats to initial position；Wherein,
Cooling device is wrapped in the outside of the heating device outside barrel, and the type of cooling of cooling device is circulating water；Pass through
Cooling device makes barrel temperature after cooling lower than 200 DEG C.
(7) cyclic process: repeat the operation of step (2) to step (6), process next magnesium alloy product.
Using having the beneficial effect that for semi-solid magnesium alloy high pressure injection molding of the present invention, semi-solid magnesium alloy is selected to add
The optimum temperature of work be barrel temperature, and by first by mold be heated to the consistent mode of barrel temperature so that injection nozzle
The temperature of semi-solid magnesium alloy be at optimal processing temperature and between mold substantially without the temperature difference, and then avoid
Since shaped article surface is not smooth enough or phenomena such as edge size is unstable caused by magnesium alloy temperature decrease；Due to
Magnesium alloy during heating can heat release made thus during screw rod is retracted by cooling down processing to barrel
It is down to 200 DEG C hereinafter, effectively prevent next batch materials during push due to magnesium alloy temperature it is excessively high caused by produce
Quality is unstable；By high pressure ejecting device, so that the speed of magnesium alloy injection nozzle is much higher than existing issuing velocity, into
The quality of one step guarantee shaped article；Using the moulding process, technical process is fastidious, accurate, and can make molding product size
It is more acurrate, surface is more smooth, quality is more stable, it may also be used for the more complicated workpiece of processing, is suitable in magnesium alloy manufacture field
It is inside widely popularized and applies.
Specific embodiment
A kind of semi-solid magnesium alloy high pressure injection molding, includes the following steps:
(1) mold heats: mold used in product to be formed being passed through the heating device being set in the mold and is added
Heat makes the temperature of mold reach 350 DEG C, when subsequent magnesium alloy being avoided to be injected in die cavity, due to product ruler caused by the temperature difference
Phenomena such as very little unstable；Wherein, the heating method of heating device is high temperature oil heating, guarantees that mold can be heated to specified temperature
Spend and can be stable be kept at this temperature.
(2) feeding material: measuring and the quality for magnesium alloy needed for single product of weighing, then will be by metering by feeding port
The solid Magnesium Alloy of weighing, i.e. magnesium alloy particles or magnesium alloy fragment are sent into barrel.
(3) barrel heats: barrel being heated to 350 DEG C by the heating device being wrapped in outside barrel, which is magnesium conjunction
The optimum temperature of golden processing and forming；Wherein, the heating method of used heating device is electromagnetic induction heating, the heating method
Heating speed it is fast, low energy consumption, energy saving.
(4) melting materialss: solid Magnesium Alloy pushes under the rotation for the screw rod being located in barrel to nozzle direction, and constantly
It cut, melted, until being molten into semi-solid magnesium alloy when reaching at nozzle.
(5) ejection formation: quickly being pushed screw rod to nozzle direction by high pressure ejecting device, make semi-solid magnesium alloy by
It is projected by nozzle at high speeds to the die cavity of mold according to the speed of 6m/s, is different from existing low-speed jet speed, injection speed
The each corner that can guarantee that semi-solid magnesium alloy quickly fills with die cavity is spent, is opened again after formed product, takes out moulded products simultaneously
It is cooled at room temperature, and then obtains magnesium alloy product.
(6) retract cooling: after completing the process a magnesium alloy product, screw rod can be retracted into initial position；After screw rod
It is by cooling device that barrel is cooling during retreating to initial position, make the temperature of barrel lower than 200 DEG C, preferably 200
DEG C, and then avoid next group semi-solid magnesium alloy during push, since magnesium alloy heat release and barrel temperature are excessively high and lead
The heat of cause is superimposed, and is unfavorable for the molding of product；In such a way that barrel is cooling, next group magnesium alloy can be made to push at nozzle
When, temperature can be right up to 350 DEG C of required optimal process temperature；Wherein, cooling device is wrapped in adding outside barrel
The outside of thermal, and the type of cooling of the cooling device is circulating water.
(7) cyclic process: again by way of repeating step (2) to step (6), next magnesium alloy system is processed
Product.
By above-mentioned semi-solid magnesium alloy high pressure injection molding, can make molding product size is more acurrate, surface more
It is smooth, quality is more stable, it may also be used for the more complicated workpiece of processing, is suitable for being widely popularized and answering in magnesium alloy manufacture field
With.
Claims (9)
1. a kind of semi-solid magnesium alloy high pressure injection molding, which comprises the steps of:
(1) mold heats: mold used in product to be formed is heated；
(2) it is sent into material: will be sent into barrel by the solid Magnesium Alloy of metering weighing by feeding port；
(3) barrel heats: being heated barrel by the heating device being wrapped in outside barrel；
(4) melting materialss: solid Magnesium Alloy pushes under the rotation for the screw rod being located in barrel to nozzle direction, and is constantly cut
It cuts, melt, until being molten into semi-solid magnesium alloy when reaching at nozzle；
(5) ejection formation: screw rod is pushed to nozzle direction by high pressure ejecting device, penetrates semi-solid magnesium alloy by nozzle
It out in the die cavity of mold, is opened, takes out, cools down again after molding, obtain magnesium alloy product；
(6) cooling is retracted: by cooling device that barrel is cooling during screw retreats to initial position；
(7) cyclic process: repeat the operation of step (2) to step (6), process next magnesium alloy product.
2. semi-solid magnesium alloy high pressure injection molding as described in claim 1, which is characterized in that in step (1), mold
The temperature of heating is 345 DEG C~355 DEG C.
3. semi-solid magnesium alloy high pressure injection molding as described in claim 1, which is characterized in that in step (3), barrel
The temperature of heating is 345 DEG C~355 DEG C.
4. semi-solid magnesium alloy high pressure injection molding as described in claim 1, which is characterized in that in step (6), barrel
Cooling temperature is lower than 200 DEG C.
5. semi-solid magnesium alloy high pressure injection molding as described in claim 1, which is characterized in that in step (5), half is solid
The speed of state magnesium alloy injection nozzle is 5m/s~7m/s.
6. semi-solid magnesium alloy high pressure injection molding as described in claim 1, which is characterized in that in step (1), to mould
The heating method of tool is high temperature oil heating.
7. semi-solid magnesium alloy high pressure injection molding as described in claim 1, which is characterized in that in step (3), barrel
The heating method of the heating device of outer setting is electromagnetic induction heating, resistance heating or heat carrier heating.
8. semi-solid magnesium alloy high pressure injection molding as described in claim 1, which is characterized in that cooling in step (6)
Device is wrapped in the outside of the heating device outside barrel.
9. semi-solid magnesium alloy high pressure injection molding as claimed in claim 1 or 8, which is characterized in that in step (6),
The type of cooling of cooling device is circulating water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910384307.9A CN110014131A (en) | 2019-05-09 | 2019-05-09 | A kind of semi-solid magnesium alloy high pressure injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910384307.9A CN110014131A (en) | 2019-05-09 | 2019-05-09 | A kind of semi-solid magnesium alloy high pressure injection molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110014131A true CN110014131A (en) | 2019-07-16 |
Family
ID=67193407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910384307.9A Pending CN110014131A (en) | 2019-05-09 | 2019-05-09 | A kind of semi-solid magnesium alloy high pressure injection molding |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07155918A (en) * | 1993-12-06 | 1995-06-20 | Honda Motor Co Ltd | Metal injection forming method and device therefor |
| US5711366A (en) * | 1996-05-31 | 1998-01-27 | Thixomat, Inc. | Apparatus for processing corrosive molten metals |
| EP0905266A1 (en) * | 1997-09-29 | 1999-03-31 | Mazda Motor Corporation | Process for shaping semi-solid light metal alloy material and products obtained by using this process |
| EP1081243A1 (en) * | 1999-09-06 | 2001-03-07 | Mazda Motor Corporation | Member formed from magnesium alloy |
| CN2475483Y (en) * | 2001-04-24 | 2002-02-06 | 北京有色金属研究总院 | Thixotropic squeezing device |
| JP2002144000A (en) * | 2000-11-10 | 2002-05-21 | Kobe Steel Ltd | Method for injection-forming light alloy and its device |
| CN103014381A (en) * | 2012-10-12 | 2013-04-03 | 长春工业大学 | High-strength high-toughness magnesium alloy produced by semi-solid injection molding method |
| CN107790668A (en) * | 2017-09-01 | 2018-03-13 | 东风精密铸造安徽有限公司 | A kind of semi-solid-state metal thixo-injection molding equipment |
-
2019
- 2019-05-09 CN CN201910384307.9A patent/CN110014131A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07155918A (en) * | 1993-12-06 | 1995-06-20 | Honda Motor Co Ltd | Metal injection forming method and device therefor |
| US5711366A (en) * | 1996-05-31 | 1998-01-27 | Thixomat, Inc. | Apparatus for processing corrosive molten metals |
| EP0905266A1 (en) * | 1997-09-29 | 1999-03-31 | Mazda Motor Corporation | Process for shaping semi-solid light metal alloy material and products obtained by using this process |
| EP1081243A1 (en) * | 1999-09-06 | 2001-03-07 | Mazda Motor Corporation | Member formed from magnesium alloy |
| JP2002144000A (en) * | 2000-11-10 | 2002-05-21 | Kobe Steel Ltd | Method for injection-forming light alloy and its device |
| CN2475483Y (en) * | 2001-04-24 | 2002-02-06 | 北京有色金属研究总院 | Thixotropic squeezing device |
| CN103014381A (en) * | 2012-10-12 | 2013-04-03 | 长春工业大学 | High-strength high-toughness magnesium alloy produced by semi-solid injection molding method |
| CN107790668A (en) * | 2017-09-01 | 2018-03-13 | 东风精密铸造安徽有限公司 | A kind of semi-solid-state metal thixo-injection molding equipment |
Non-Patent Citations (2)
| Title |
|---|
| 尹超林: "《压铸成型技术及模具-设计与实践》", 31 January 2017 * |
| 特种铸造手册编写组: "《特种铸造手册下册》", 30 August 1978 * |
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Application publication date: 20190716 |