CN101653815A - Nonferrous metal lost foam casting process and device - Google Patents
Nonferrous metal lost foam casting process and device Download PDFInfo
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- CN101653815A CN101653815A CN200910182706A CN200910182706A CN101653815A CN 101653815 A CN101653815 A CN 101653815A CN 200910182706 A CN200910182706 A CN 200910182706A CN 200910182706 A CN200910182706 A CN 200910182706A CN 101653815 A CN101653815 A CN 101653815A
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Abstract
The invention relates to the casting field, in particular to nonferrous metal lost foam casting process and device by a pipeline suction method. The process comprises the following steps: a. accordingto a conventional lost foam casting process, carrying out sand filling and connecting a die cavity to a negative pressure system for vacuumization; b. communicating one end as an injection end of a suction-injection pipe with a sprue gate of a gating system, and sealing the other end as a suction end of the suction-injection pipe, and continuously vacuumizing the die cavity and the suction-injection pipe; c. embedding the suction end of the suction-injection pipe in pouring liquid, and unsealing the suction end to enable a nonferrous metal solution to be sucked into the die cavity; d. and cooling and moulding casting products, thereby completing the casting. The device is provided with a negative pressure casting box, a die arranged in the negative pressure casting box, and a vacuum extractor communicated to the negative pressure casting box, wherein the sprue gate of the negative pressure casting box is hermetically connected with one end of the pipeline, and the other end of the pipeline is embedded in the pouring liquid. The invention prevents molten metal from being oxidized, so that the surface of finished casting is smooth and has no air holes, thereby improving the mechanical behaviour of the casting.
Description
Technical field
The present invention relates to casting field, especially nonferrous metal lost foam casting process and the device of pouring into a mould by the pipeline inhalation.
Background technology
Lost foam casting is that paraffin similar to the casting dimension shape or bubbles model bonding are combined into model cluster, after brushing fireproof coating and oven dry, be embedded in vibration molding in the dried quartz sand, under negative pressure, pour into a mould, make the model gasification, liquid metals occupies modal position, solidifies the novel casting method that the cooling back forms foundry goods.
At present, what the lost foam casting non-ferrous metal used is to utilize cup to pour into a mould, there are many defectives in the coloured cup structure of existing lost foam casting, cup and casting ladle need keep certain space distance and certain poring rate during cast, liquation contacts can cause with air with air in this distance and contacts, make the liquation oxidation, and operating personnel can not accurately hold the speed of cast and the degree of accuracy of cast.Also because can not accurately the holding of cast distance and speed, make that molten metal can not be cup " shutting " fully, the cast subnormal ambient suffers to destroy to be infiltrated air and makes the liquation oxidation, influences the mechanical performance of foundry goods.
Summary of the invention
The technical problem to be solved in the present invention is: shortcoming and deficiency in order to solve above-mentioned existence, a kind of nonferrous metal lost foam casting process and device are provided, and in the foundry goods that has prevented to cause pore is arranged owing to the cast entrained air, improved the performance of foundry goods.
The technical solution adopted for the present invention to solve the technical problems is: a kind of nonferrous metal lost foam casting process has following processing step
A, lost foam casting process routinely carry out back-up sand, die cavity connects negative pressure system and vacuumizes;
B, an end of suction pipe is communicated with the sprue gate of running gate system as injection end, the suction pipe other end seals the suction side of suction pipe as the suction side, and continues die cavity and suction pipe are vacuumized;
C, the suction side of suction pipe is imbedded in the potting syrup, removed the sealing of suction side, make non-ferrous metal solution be inhaled into die cavity;
D, cast product cooling forming are finished cast.
Further, the suction side of suction pipe is sealed be to use and in the suction pipe, become under the negative pressure state absorption naturally to be closed in the suction side of suction pipe with the sheet metal of non-ferrous metal solution material of the same race.
The nonferrous metal lost foam casting device, have negative-pressure flask, place the mould of negative-pressure flask and be communicated to the vacuum extractor of negative-pressure flask, be connected with the suction device of circulation potting syrup on the negative-pressure flask, the suction device comprises the infusion port that is communicated with sprue gate on the negative-pressure flask and imbeds liquid sucting port in the potting syrup of casting ladle, before carrying out, cast now integral body is vacuumized, pour into a mould then, because the suction device directly is communicated with potting syrup, can not contact when making cast, improve the performance of foundry goods with air.
Further, for make the suction device simple in structure, realize that the circulation of potting syrup, suction device comprise that an end connects negative-pressure flask sprue gate and the other end and imbeds the pipeline in the potting syrup and be arranged on switching device on the pipeline easily.
For simplified structure, cast properties is provided, switching device is the air baffler, the air baffler is fixed on the pipe end at liquid sucting port place.
In order to prevent the easy oxidation of solution, the square plate of air baffler for making with the potting syrup same material, when the air baffler stretched in the potting syrup, because the air baffler the during high temperature of potting syrup melts, dissolving the back potting syrup can pour into a mould by flow ipe.
For potting syrup circulation control easily, the check valve that switching device flows to the negative-pressure flask sprue gate for the control potting syrup.
For the protection of environment, the easy formation of foundry goods, vacuum extractor comprises the Purge gas jar that is connected by pipe fitting with negative-pressure flask, the negative-pressure cup that is communicated with the Purge gas jar, the vavuum pump that is communicated with negative-pressure cup and the pond that is communicated with vavuum pump.
Be under the subnormal ambient in the nonferrous metal lost foam casting device busy, because negative-pressure flask has certain relative permeability, so the inside of the suction device that is communicated with negative-pressure flask is negative pressure, switching device is opened, negative pressure in the pipeline sucks liquation, make potting syrup flow into the mould place, mould is heated and melts evaporation, finishes the cast requirement.
The invention has the beneficial effects as follows, nonferrous metal lost foam casting process of the present invention and device can be reused the reduction consumables cost, have prevented molten metal from being oxidized, promote casting quality, make the smooth surface of finished product cast not have pore, improve the mechanical performance of foundry goods.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of Fig. 1 partial structurtes negative-pressure flask cast.
Among the figure 1, negative-pressure flask, 2, mould, 3, the suction device, 3-1, pipeline, 3-2, air baffler, 4-1, Purge gas jar, 4-2, negative-pressure cup, 4-3, vavuum pump, 4-4, pond.
The specific embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
Nonferrous metal lost foam casting process has following processing step
A, lost foam casting process routinely carry out back-up sand, die cavity connects negative pressure system and vacuumizes;
B, an end of suction pipe is communicated with the sprue gate of running gate system as injection end, the suction pipe other end seals the suction side of suction pipe as the suction side, and continues die cavity and suction pipe are vacuumized;
C, the suction side of suction pipe is imbedded in the potting syrup, removed the sealing of suction side, make non-ferrous metal solution be inhaled into die cavity;
D, cast product cooling forming are finished cast.
Described suction side with the suction pipe is sealed and is to use with the sheet metal of non-ferrous metal solution material of the same race to become to adsorb the suction side that is closed in the suction pipe under the negative pressure state naturally in the suction pipe.
The nonferrous metal lost foam casting device of preferred forms as shown in Figure 1 and Figure 2, have negative-pressure flask 1, place the mould 2 of negative-pressure flask 1 and be communicated to the vacuum extractor of negative-pressure flask 1, be connected with the suction device 3 of circulation potting syrup on the negative-pressure flask 1, suction device 3 comprises the infusion port that is communicated with sprue gate on the negative-pressure flask 1 and imbeds liquid sucting port in the potting syrup of casting ladle.
Suction device 3 comprises that an end connects negative-pressure flask 1 sprue gate and the other end and imbeds the pipeline 3-1 in the potting syrup and be arranged on switching device on the pipeline 3-1.Switching device is air baffler 3-2, and air baffler 3-2 is fixed on the pipeline 3-1 port at liquid sucting port place.Air baffler 3-2 is the square plate made from the potting syrup same material.Vacuum extractor comprises Purge gas jar 4-1, the negative-pressure cup 4-2 that is communicated with Purge gas jar 4-1, vavuum pump 4-3 that is communicated with negative-pressure cup 4-2 that is connected by pipe fitting with negative-pressure flask 1 and the pond 4-4 that is communicated with vavuum pump 4-3.
The present invention puts into negative-pressure flask 1 with mould 2 earlier; sand is tamped; then pipeline 3-1 one end of suction device 3 is linked to each other with running gate system in the negative-pressure flask 1; the fixedly shutoff of air baffler 3-2 of making of the other end of pipeline 3-1 with the potting syrup same material; make the pipeline 3-1 and the external world be separated by; by vacuum extractor negative-pressure flask 1 and suction device 3 integral body are vacuumized then; owing to have pore on the madial wall of the interior case of sandbox; make that gas flows out from the pore on the inner box side face when vacuumizing; make the sand in the case can not flow out and be attached with grid on the madial wall of interior case from pore; the pipeline 3-1 mouth that will be fixed with dividing plate one end is then imbedded in the potting syrup; because the high temperature of potting syrup makes dividing plate melt; then potting syrup is because the effect of negative pressure; flow into mould 2 die cavities of negative-pressure flask 1 by pipeline 3-1; because the high temp effect of potting syrup; make mould 2 melt and evaporate; at this moment the vavuum pump 4-3 by vacuum extractor sucks Purge gas jar 4-1 with vaporized gas and carries out pernicious gas and evolve; gas then enters negative-pressure cup 4-2 by Purge gas jar 4-1; be discharged in the water in the 4-4 of pond by vavuum pump 4-3; the cast of foundry goods is finished in the harm of having protected pernicious gas to enter air.
Another embodiment of the present invention is: described air baffler 3-2 is a plastic sheeting, and in the time of in imbedding potting syrup, because action of high temperature makes it dissolve evaporation, gas is detached.
Another embodiment of the present invention is: described air baffler 3-2 is that the material that is insoluble to potting syrup is made, and on the dividing plate handle is set, and by handle dividing plate is detached when it is embedded in the potting syrup, can pour into a mould.
With above-mentioned foundation desirable embodiment of the present invention is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.The technical scope of this invention is not limited to the content on the specification, must determine its technical scope according to the claim scope.
Claims (8)
1. a nonferrous metal lost foam casting process is characterized in that: have following processing step
A, lost foam casting process routinely carry out back-up sand, die cavity connects negative pressure system and vacuumizes;
B, an end of suction pipe is communicated with the sprue gate of running gate system as injection end, the suction pipe other end seals the suction side of suction pipe as the suction side, and continues die cavity and suction pipe are vacuumized;
C, the suction side of suction pipe is imbedded in the potting syrup, removed the sealing of suction side, make non-ferrous metal solution be inhaled into die cavity;
D, cast product cooling forming are finished cast.
2. nonferrous metal lost foam casting process according to claim 1 is characterized in that: described suction side with the suction pipe is sealed and is to use with the sheet metal of non-ferrous metal solution material of the same race to become to adsorb the suction side that is closed in the suction pipe under the negative pressure state naturally in the suction pipe.
3. preparation is as the casting device of claim 1 technology, have negative-pressure flask (1), place the mould (2) of negative-pressure flask (1) and be communicated to the vacuum extractor of negative-pressure flask (1), it is characterized in that: be connected with the suction device (3) of circulation potting syrup on the negative-pressure flask (1), suction device (3) comprises the infusion port that is communicated with sprue gate on the negative-pressure flask (1) and imbeds liquid sucting port in the potting syrup of casting ladle.
4. nonferrous metal lost foam casting device according to claim 3 is characterized in that: described suction device (3) comprises that an end connects negative-pressure flask (1) sprue gate and the other end and imbeds the pipeline (3-1) in the potting syrup and be arranged on switching device on the pipeline (3-1).
5. nonferrous metal lost foam casting device according to claim 4 is characterized in that: described switching device is air baffler (3-2), and air baffler (3-2) is fixed on the pipe end at liquid sucting port place.
6. nonferrous metal lost foam casting device according to claim 5 is characterized in that: described air baffler (3-2) is the square plate made from the potting syrup same material.
7. nonferrous metal lost foam casting device according to claim 4 is characterized in that: the check valve that described switching device flows to the negative-pressure flask sprue gate for the control potting syrup.
8. nonferrous metal lost foam casting device according to claim 3 is characterized in that: described vacuum extractor comprises the Purge gas jar (4-1) that is connected by pipe fitting with negative-pressure flask (1), the negative-pressure cup (4-2) that is communicated with Purge gas jar (4-1), the vavuum pump (4-3) that is communicated with negative-pressure cup (4-2) and the pond (4-4) that is communicated with vavuum pump (4-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910182706A CN101653815A (en) | 2009-09-03 | 2009-09-03 | Nonferrous metal lost foam casting process and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910182706A CN101653815A (en) | 2009-09-03 | 2009-09-03 | Nonferrous metal lost foam casting process and device |
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| Publication Number | Publication Date |
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| CN101653815A true CN101653815A (en) | 2010-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910182706A Pending CN101653815A (en) | 2009-09-03 | 2009-09-03 | Nonferrous metal lost foam casting process and device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102218507A (en) * | 2011-06-14 | 2011-10-19 | 安徽全柴天和机械有限公司 | Lost foam casting technology leading sands to be compacter |
| CN102825215A (en) * | 2012-10-09 | 2012-12-19 | 嘉禾巨人机床有限公司 | Lost foam casting method for heavy casting |
| CN102831809A (en) * | 2011-06-14 | 2012-12-19 | 天津市医学堂科技有限公司 | Method for making model |
| CN103008542A (en) * | 2011-09-23 | 2013-04-03 | 淅川金戈利冶金铸造有限公司 | Lost foam casting weight pressure-casting device |
| CN110227796A (en) * | 2019-05-31 | 2019-09-13 | 台州巨东精密铸造有限公司 | A kind of resin sand casting mould and its manufacture craft |
| CN110935844A (en) * | 2019-12-06 | 2020-03-31 | 福建省神悦铸造股份有限公司 | Improved generation lost foam casting production line |
-
2009
- 2009-09-03 CN CN200910182706A patent/CN101653815A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102218507A (en) * | 2011-06-14 | 2011-10-19 | 安徽全柴天和机械有限公司 | Lost foam casting technology leading sands to be compacter |
| CN102831809A (en) * | 2011-06-14 | 2012-12-19 | 天津市医学堂科技有限公司 | Method for making model |
| CN103008542A (en) * | 2011-09-23 | 2013-04-03 | 淅川金戈利冶金铸造有限公司 | Lost foam casting weight pressure-casting device |
| CN103008542B (en) * | 2011-09-23 | 2015-07-29 | 淅川金戈利冶金铸造有限公司 | Pressure pouring device for lost foam casting weight |
| CN102825215A (en) * | 2012-10-09 | 2012-12-19 | 嘉禾巨人机床有限公司 | Lost foam casting method for heavy casting |
| CN102825215B (en) * | 2012-10-09 | 2013-12-04 | 嘉禾巨人机床有限公司 | Lost foam casting method for heavy casting |
| CN110227796A (en) * | 2019-05-31 | 2019-09-13 | 台州巨东精密铸造有限公司 | A kind of resin sand casting mould and its manufacture craft |
| CN110227796B (en) * | 2019-05-31 | 2020-12-18 | 台州巨东精密铸造有限公司 | Resin sand casting mold and manufacturing process thereof |
| CN110935844A (en) * | 2019-12-06 | 2020-03-31 | 福建省神悦铸造股份有限公司 | Improved generation lost foam casting production line |
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Application publication date: 20100224 |