CN102554177A - Pressure casting process for needle frame - Google Patents
Pressure casting process for needle frame Download PDFInfo
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- CN102554177A CN102554177A CN2010105581614A CN201010558161A CN102554177A CN 102554177 A CN102554177 A CN 102554177A CN 2010105581614 A CN2010105581614 A CN 2010105581614A CN 201010558161 A CN201010558161 A CN 201010558161A CN 102554177 A CN102554177 A CN 102554177A
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- mould
- injection
- pressure
- foundry goods
- casting
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Abstract
The invention discloses a pressure casting process for a needle frame, which includes the steps: mounting, preheating and cleaning a mould; spraying coatings on the mould; placing the mould on a mould closing device for closing the mould; selecting injection pressure and filling speed; filling liquid metal into a cavity and leading the cavity to be filled; continuing injection under the action of an injection plunger until the liquid metal filled to a flow gate of the cavity is completely solidified; opening the cavity to take out a casting after holding pressure; and cleaning the casting. The pressure casting process has the advantages that fine product quality is ensured, precision, strength and hardness are high, machining amount is small, a large quantity of machining equipment and working hours are decreased, metal utilization rate is increased, both assembly time and metal are saved, production efficiency is high, and mechanization and automation are easily realized.
Description
Technical field:
The present invention relates to a kind of punch block pressure casting process.
Background technology:
Punch block compression casting is one of state-of-the-art metal forming process, is to realize few smear metal, and the effective way of chipless is used very extensively, develops very fast.Diecasting alloys no longer are confined to zinc, aluminium, magnesium and the copper of non-ferrous metal at present; And enlarge gradually and be used for die casting cast iron and steel-casting, and the pressure casting method of traditional punch block has certain shortcoming: poor product quality, and precision, intensity, hardness are low; Processing capacity is big; Increased a large amount of process equipments and man-hour, production efficiency is low, is difficult for realizing mechanization and automation.
Summary of the invention:
The objective of the invention is provides a kind of assurance good product quality in order to overcome above deficiency, and production efficiency is high, the punch block pressure casting process that economic effect is good.
The object of the invention is realized through following technical scheme: a kind of punch block pressure casting process may further comprise the steps:
A, installation mold;
B, preheated mold, preheat temperature are 300-350 ℃;
C, cleaning mould;
D, on mould stenciling coating;
E, mould is placed on carries out matched moulds on the mold closing mechanism;
F, selection injection ratio pressure and filling velocity are opened liquid metal the injection die cavity and are full of die cavity, and the selection of injection ratio pressure should be confirmed according to different-alloy and casting structure characteristic.To the selection of filling velocity, the foundry goods of generally having relatively high expectations for heavy wall or internal soundness should be selected lower filling velocity and high boost pressure; For thin-walled or demanding foundry goods of surface quality and complicated foundry goods, should select higher ratio to go through and high filling velocity.The process of molten metal from the holding furnace spoon to the pressure chamber, pony ladle, pressure chamber, the hot temperature of giving of injection punch head has direct influence together to pouring temperature, and the temperature of holding furnace inner metal liquid generally has direct influence than actual pouring temperature, and cast casting temperature is made as 700-730 ℃;
G, continuation injection under the injection punch head effect are solidified to ingate until liquid metal filling die cavity fully, and mould remaining time is 250-300s;
H, hold and press the back open form to take out foundry goods, ejection cycle is 1-2s;
I, cleaning foundry goods.
The present invention compared with prior art has the following advantages:
1, guarantees good product quality, precision, intensity, hardness height;
2, processing capacity is little, has reduced a large amount of process equipments and man-hour, improves using rate of metal, when not only having saved the assembler but also save metal;
3, production efficiency is high, is prone to realize mechanization and automation.
The specific embodiment:
In order to deepen to understanding of the present invention, will combine embodiment that the present invention is made further detailed description below, this embodiment only is used to explain the present invention, does not constitute the qualification to protection domain of the present invention.
A kind of specific embodiment of pressure casting process of the present invention may further comprise the steps:
A, installation mold;
B, preheated mold, preheat temperature are 300-350 ℃;
C, cleaning mould;
D, on mould stenciling coating;
E, mould is placed on carries out matched moulds on the mold closing mechanism;
F, selection injection ratio pressure and filling velocity are opened liquid metal the injection die cavity and are full of die cavity, and the selection of injection ratio pressure should be confirmed according to different-alloy and casting structure characteristic.To the selection of filling velocity, the foundry goods of generally having relatively high expectations for heavy wall or internal soundness should be selected lower filling velocity and high boost pressure; For thin-walled or demanding foundry goods of surface quality and complicated foundry goods, should select higher ratio to go through and high filling velocity.The process of molten metal from the holding furnace spoon to the pressure chamber, pony ladle, pressure chamber, the hot temperature of giving of injection punch head has direct influence together to pouring temperature, and the temperature of holding furnace inner metal liquid generally has direct influence than actual pouring temperature, and cast casting temperature is made as 700-730 ℃;
G, continuation injection under the injection punch head effect are solidified to ingate until liquid metal filling die cavity fully;
The length of holding the pressure time depends on the material and the wall thickness of foundry goods.
H, hold and press the back open form to take out foundry goods;
The open form time is answered precise control.The open form time is too short, because alloy strength is still low, possibly ejects and when die-casting die falls, causes distortion at foundry goods; But the open form time is oversize, and then casting temperature is low excessively, shrink big, to loosing core and to eject the resistance of foundry goods also big.The general open form time presses 1 millimeter need of casting section thickness and calculates for 3 seconds, adjusts through trial then.
I, cleaning foundry goods.
The cleaning of foundry goods is very hard work, 10～15 times of its workload die casting workload often.Therefore with the raising of die casting machine productivity ratio, the increase of output, casting cleaning work realize that mechanization and automation are very important, need excision cast gate and overlap, surface treatment and finishing.
The present invention has the assurance good product quality, and precision, intensity, hardness are high, and processing capacity is little, has reduced a large amount of process equipments and man-hour, improves using rate of metal, and when not only having saved the assembler but also save metal, production efficiency is high, is prone to realize the advantage of mechanization and automation.
Claims (1)
1. punch block pressure casting process is characterized in that: may further comprise the steps:
A, installation mold;
B, preheated mold, preheat temperature are 300-350 ℃;
C, cleaning mould;
D, on mould stenciling coating;
E, mould is placed on carries out matched moulds on the mold closing mechanism;
F, selection injection ratio pressure and filling velocity are opened liquid metal the injection die cavity and are full of die cavity, and the selection of injection ratio pressure should be confirmed according to different-alloy and casting structure characteristic.To the selection of filling velocity, the foundry goods of generally having relatively high expectations for heavy wall or internal soundness should be selected lower filling velocity and high boost pressure; For thin-walled or demanding foundry goods of surface quality and complicated foundry goods, should select higher ratio to go through and high filling velocity.The process of molten metal from the holding furnace spoon to the pressure chamber, pony ladle, pressure chamber, the hot temperature of giving of injection punch head has direct influence together to pouring temperature, and the temperature of holding furnace inner metal liquid generally has direct influence than actual pouring temperature, and cast casting temperature is made as 700-730 ℃;
G, continuation injection under the injection punch head effect are solidified to ingate until liquid metal filling die cavity fully, and mould remaining time is 250-300s;
H, hold and press the back open form to take out foundry goods, ejection cycle is 1-2s;
I, cleaning foundry goods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105581614A CN102554177A (en) | 2010-11-24 | 2010-11-24 | Pressure casting process for needle frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105581614A CN102554177A (en) | 2010-11-24 | 2010-11-24 | Pressure casting process for needle frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102554177A true CN102554177A (en) | 2012-07-11 |
Family
ID=46401543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105581614A Pending CN102554177A (en) | 2010-11-24 | 2010-11-24 | Pressure casting process for needle frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102554177A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103909245A (en) * | 2014-04-04 | 2014-07-09 | 安徽省辉煌机械制造有限公司 | Gear chamber cover manufacturing process |
| CN103909244A (en) * | 2014-04-04 | 2014-07-09 | 安徽省辉煌机械制造有限公司 | Process for manufacturing shells of speed reducers |
| CN109022889A (en) * | 2018-09-03 | 2018-12-18 | 北京有色金属与稀土应用研究所 | A kind of high intensity gold-base alloy material and its preparation method and application |
| CN112404389A (en) * | 2020-11-18 | 2021-02-26 | 无锡市斌悦机械科技有限公司 | Die casting process of main body die |
-
2010
- 2010-11-24 CN CN2010105581614A patent/CN102554177A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103909245A (en) * | 2014-04-04 | 2014-07-09 | 安徽省辉煌机械制造有限公司 | Gear chamber cover manufacturing process |
| CN103909244A (en) * | 2014-04-04 | 2014-07-09 | 安徽省辉煌机械制造有限公司 | Process for manufacturing shells of speed reducers |
| CN109022889A (en) * | 2018-09-03 | 2018-12-18 | 北京有色金属与稀土应用研究所 | A kind of high intensity gold-base alloy material and its preparation method and application |
| CN112404389A (en) * | 2020-11-18 | 2021-02-26 | 无锡市斌悦机械科技有限公司 | Die casting process of main body die |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120711 |