CN102784902A - Metal mold pressure regulating casting device - Google Patents
Metal mold pressure regulating casting device Download PDFInfo
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- CN102784902A CN102784902A CN2012102079517A CN201210207951A CN102784902A CN 102784902 A CN102784902 A CN 102784902A CN 2012102079517 A CN2012102079517 A CN 2012102079517A CN 201210207951 A CN201210207951 A CN 201210207951A CN 102784902 A CN102784902 A CN 102784902A
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Abstract
The invention discloses a metal mold pressure regulating casting device and belongs to the field of metal mold antigravity casting. Compared with a two-section type tank body of a traditional pressure regulating casting device, namely a main machine system structure with an upper tank body and a lower tank body, the metal mold pressure regulating casting device is additionally provided with a middle tank body for installing necessary mechanical structures of a metal mold and an open-close mold. The upper tank body, the middle tank body and the lower tank body of the metal mold pressure regulating casting device are locked through a mechanical clamping ring mechanism to ensure sealing effect. The metal mold pressure regulating casting device can achieve casting forming through pressure regulating casting technology based on the metal mold, can be applied to sand mold, investment casting shuttering and plaster mold pressure regulating casting forming of castings and simultaneously can be applied to metal mold, sand mold, investment casting shuttering and plaster mold counter-pressure casting and low-pressure casting forming of castings. Therefore, the metal mold pressure regulating casting device is wide in application, and achieves good combination between pressure regulating casting and the metal mold.
Description
Technical field
The present invention is applied to metal mold antigravity casting field, relates to metal mold adjustable pressure casting equipment, and this metal mold adjustable pressure casting equipment is furnished with metal mold folding type mechanical mechanism, can realize the adjustable pressure casting function to metal mold.
Background technology
As everyone knows, permanent mold casting is meant molten metal is poured into metal mold with the gravity-assist pouring method, to obtain a kind of casting method of foundry goods.The permanent mold casting foundry goods has that surface quality is good, dimensional accuracy is higher, dense internal organization, mechanical performance are good, production efficiency is than advantages such as height, so permanent mold casting is widely used in non-ferrous alloy casting productions such as aluminium alloy.
Although permanent mold casting possesses above-mentioned advantage, yet, adopt the gravity-assist pouring method to pour into the foundry goods that metal mold obtains, still there are some insoluble technical problems.For example, be unfavorable for the foundry goods of feeding for the contour structures complicacy, if adopt permanent mold casting, the design of its running gate system has just received the restriction of casting structure condition, is difficult to the final qualified foundry goods that obtains to meet specification requirement.Under this kind situation; Based on metal mold, carry out castable through Countergravity casting methods such as low pressure casting or counter-pressure castings, can effectively solve the shaping problem that a part is unfavorable for the foundry goods of feeding; In addition, Countergravity casting method can further improve the internal soundness of foundry goods.
But; Extremely complicacy and internal soundness require high foundry goods for structure; Like the housing class foundry goods of some aircraft engine fuel oil systems,, finally also be difficult to obtain to meet the qualified foundry goods of specification requirement even adopt low pressure casting or counter-pressure casting method; This just needs to use advanced more foundry engieering method, with shaping and the internal soundness problem that solves this type of foundry goods.
Adjustable pressure casting is the more advanced antigravity casting technology of a kind of more conventional low pressure casting and counter-pressure casting; The adjustable pressure casting technology is a kind of antigravity casting technology that on conventional counter-pressure casting technical foundation, grows up, and its main technique advantage comprises that vacuum melting and insulation, negative pressure fill type, positive differential pressure and solidify etc.The adjustable pressure casting technology is that production both at home and abroad is the non-ferrous alloy casting of representative with the aluminium alloy at present, particularly is directed against the state-of-the-art cast form technology of the intricate casting of Aero-Space industry high-quality requirement.
Consult Fig. 1, existing adjustable pressure casting equipment is generally two sections tank body formula structures being made up of upper tank body 1 and lower tank 3, separates and locking through binding ring between two sections tank bodies; The sand mold or the investment casting formwork that are positioned on the median septum 4 are arranged in the upper tank body 1; Insulation crucible 9 is arranged in the lower tank 3, and stalk 8 one ends insert in the liquid of insulation crucible 9, the sand mold of the other end and upper tank body 1 or investment casting formwork internal communication.During work,, realize adjustable pressure casting through controlling upper tank body 1 and lower tank 3 cavity pressures respectively.But the said equipment can't be provided with the necessary folding type of permanent mold casting mechanical mechanism, only can use and the sand mold, investment casting formwork that do not need folding type mechanical mechanism etc., thereby can't realize the application that combines of adjustable pressure casting technology and metal mold.So, have now and should use the blank that the technological equipment of producing foundry goods of adjustable pressure casting still belongs to this technical field in metal mold.
Summary of the invention
The objective of the invention is; In order to solve the deficiency that combines that prior art can't realize adjustable pressure casting technology and metal mold; The present invention provides a kind of metal mold adjustable pressure casting equipment, and this equipment has can be to the mechanical mechanism of metal mold folding type, can realize metal mold and adjustable pressure casting technology combine use; And then realize using the adjustable pressure casting technology based on metal mold, produce contour structures extremely complicacy and the high foundry goods of internal soundness requirement.
Technical scheme of the present invention is: consult Fig. 2; A kind of metal mold adjustable pressure casting equipment; Comprise upper tank body 1, middle tank body 2 and lower tank 3 successively, realize locking through upper locking ring 14 and following binding ring 15 respectively between upper tank body 1 and the middle tank body 2, between middle tank body 2 and the lower tank 3 and separate; Median septum 4 is arranged at tank body 2 bottoms in said, and said median septum 4 is divided into two cavitys with middle tank body 2 with lower tank 3; The metal mold formwork places on the median septum 4 and its upper end flushes with tank body 2 upper ends; Metal type dies 7 is connected with horizontal folding type mechanism 5; Tank body 2 sidewalls during said horizontal folding type mechanism 5 runs through; In the insulation crucible 9 in the lower tank 3 is molten metal; Stalk 8 is communicated with through the cast gate of the through hole on the median septum 4 with molten metal and metal mold formwork; The air pressure control of last canister incoming gas valve 11 and last jar of air bleeding valve 10 realization upper tank bodies 1; The air pressure control of following canister incoming gas valve 13 and following jar air bleeding valve 12 realization lower tanks 3.
Described metal mold adjustable pressure casting equipment, when loosing core in the needs top, the vertical folding type mechanism 6 that is connected with metal type dies 7 tops in addition; Upper tank body 1 top is run through in said vertical folding type mechanism 6.
Three sections tank bodies in the above-mentioned metal mold adjustable pressure casting equipment, i.e. the manufacturing of upper tank body 1, middle tank body 2 and lower tank 3 is installed all and is carried out according to the pressure vessel technology standard, and physical dimension can be confirmed as required, to be used to realize the technical process of adjustable pressure casting.
The invention has the beneficial effects as follows: metal mold adjustable pressure casting equipment provided by the invention; For realizing the folding type of metal mold, the mechanical mechanism that is used for metal mold folding type has been installed on middle tank body, this mechanical mechanism is characterised in that; Can realize the folding type of horizontal direction and the folding type of vertical direction; Folding type action drives by the hydraulic jack of hydraulic system, tank body middle part during wherein horizontal folding type mechanism is linked at, and vertical folding type mechanism is linked at the upper tank body top.The hydraulic cylinder that is used to drive folding type mechanism is fixed on outside the tank body, through the casting mold of movable sealing connecting rod link tank interior connecting plate is installed.The prior art that solves this metal mold adjustable pressure casting equipment can't realize the deficiency that combines of adjustable pressure casting technology and metal mold; Can realize metal mold and adjustable pressure casting technology combine use; And then realize using the adjustable pressure casting technology based on metal mold, produce contour structures extremely complicacy and the high foundry goods of internal soundness requirement.
Description of drawings
Fig. 1 is the sketch map of the existing upper and lower two-part tank body of the adjustable pressure casting equipment host computer system structure of expression;
Fig. 2 is the sketch map that each system of expression metal mold adjustable pressure casting equipment of the present invention forms.
Fig. 3 is the sketch map of the syllogic tank body host computer system structure of expression metal mold adjustable pressure casting equipment of the present invention;
The practical implementation instance
Below, with reference to several kind specific embodiment of description of drawings according to metal mold adjustable pressure casting equipment of the present invention.
Embodiment one
Consult Fig. 2, present embodiment provides a kind of application example that metal mold adjustable pressure casting equipment provided by the invention carries out the metal mold adjustable pressure casting of using.
Metal mold adjustable pressure casting equipment in the present embodiment comprises upper tank body 1, middle tank body 2 and lower tank 3 successively, realizes locking through upper locking ring 14 and following binding ring 15 respectively between upper tank body 1 and the middle tank body 2, between middle tank body 2 and the lower tank 3 and separates; Median septum 4 is arranged at tank body 2 bottoms in said, and said median septum 4 is divided into two cavitys with middle tank body 2 with lower tank 3; The metal mold formwork places on the median septum 4 and its upper end flushes with tank body 2 upper ends; Metal type dies 7 is connected with horizontal folding type mechanism 5; Tank body 2 sidewalls during said horizontal folding type mechanism 5 runs through; Because present embodiment needs the top to loose core, therefore the vertical folding type mechanism 6 that is connected with metal type dies 7 tops is arranged simultaneously; Upper tank body 1 top is run through in said vertical folding type mechanism 6; In the insulation crucible 9 in the lower tank 3 is the aluminium liquid as founding materials in the present embodiment; Stalk 8 is communicated with through the cast gate of the through hole on the median septum 4 with aluminium liquid and metal mold formwork; The air pressure control of last canister incoming gas valve 11 and last jar of air bleeding valve 10 realization upper tank bodies 1; The air pressure control of following canister incoming gas valve 13 and following jar air bleeding valve 12 realization lower tanks 3.
When the metal mold adjustable pressure casting equipment in the use present embodiment carries out the metal mold adjustable pressure casting, can carry out according to following technological process:
At first melted aluminium liquid is poured in the insulation crucible 9, stalk 8 backs of packing into are incubated aluminium liquid.At this moment, middle tank body 2 is aimed at the back through behind following binding ring 15 lock sealings with lower tank 3, open this folding type mechanism, begin to carry out metal type dies 7 and install according to the open form direction of horizontal folding type mechanism 5.When metal type dies 7 is installed, cast gate and the stalk 8 of metal type dies 7 aligned, subsequently metal type dies 7 and horizontal folding type mechanism 5 are coupled together, simultaneously metal type dies 7 is coupled together with vertical folding type mechanism 6.Treat metal type dies 7 and horizontal folding type mechanism 5 be connected with vertical folding type mechanism 6 finish after, mould assembly puts in place.Upper tank body 1 is aimed at locking with middle tank body 2; Mechanical snap ring mechanism locking through upper locking ring 14; Accomplish that upper tank body 1, middle tank body 2 and 3 three sections tank bodies of lower tank are intact closes sealing, this moment, upper tank body 1 was communicated with middle tank body 2 fully, between middle tank body 2 and the lower tank 3 by median septum 4 separations.
After tank body is closed sealing, open simultaneously and go up jar air bleeding valve 11 and following jar air bleeding valve 13, the top of median septum 4 separations; Be upper tank body 1 and middle tank body 2; With the bottom, promptly lower tank 3 is evacuated to the negative pressure value of technological requirement synchronously through vacuum system, closes vacuum system subsequently.Delay time after 3 ~ 5 seconds, open canister incoming gas valve 10 and following canister incoming gas valve 13, ventilate to lower tank, produce the positive differential pressure between median septum 4 upper and lower two parts with this through air-channel system according to technological requirement.At this moment, stalk 8 is full of metal type dies 7 to aluminium liquid in positive differential pressure effect lower edge in the insulation crucible 9, gets into the adjustable pressure casting crust stage; Continue to open canister incoming gas valve 10 and following canister incoming gas valve 13 simultaneously; Keep pressure reduction stable, thereby make median septum 4 tops, be i.e. upper tank body 1 and middle tank body 2, bottom; Be lower tank 3 quick air inlets, the beginning casting solidification process.After solidifying end; After jar air bleeding valve 11 is accomplished the tank body pressure release with following jar air bleeding valve 13 in the unlatching, open the upper locking ring 14 between upper tank body 1 and the middle tank body 2, behind the upper tank body 1 of slinging; Open the horizontal folding type mechanism 5 that connects metal type dies 7 and vertical folding type mechanism 6; Take out foundry goods, promptly accomplish an operation cycle, next operation cycle process can be carried out according to said process in cleaning metal type dies 7 backs.
Embodiment two
Consult Fig. 2, present embodiment provides a kind of application example that metal mold adjustable pressure casting equipment provided by the invention carries out the metal mold counter-pressure casting of using.
Metal mold adjustable pressure casting equipment in the present embodiment comprises upper tank body 1, middle tank body 2 and lower tank 3 successively, realizes locking through upper locking ring 14 and following binding ring 15 respectively between upper tank body 1 and the middle tank body 2, between middle tank body 2 and the lower tank 3 and separates; Median septum 4 is arranged at tank body 2 bottoms in said, and said median septum 4 is divided into two cavitys with middle tank body 2 with lower tank 3; The metal mold formwork places on the median septum 4 and its upper end flushes with tank body 2 upper ends; Metal type dies 7 is connected with horizontal folding type mechanism 5; Tank body 2 sidewalls during said horizontal folding type mechanism 5 runs through; Because present embodiment needs the top to loose core, therefore the vertical folding type mechanism 6 that is connected with metal type dies 7 tops is arranged simultaneously; Upper tank body 1 top is run through in said vertical folding type mechanism 6; In the insulation crucible 9 in the lower tank 3 is the aluminium liquid as founding materials in the present embodiment; Stalk 8 is communicated with through the cast gate of the through hole on the median septum 4 with aluminium liquid and metal mold formwork; The air pressure control of last canister incoming gas valve 11 and last jar of air bleeding valve 10 realization upper tank bodies 1; The air pressure control of following canister incoming gas valve 13 and following jar air bleeding valve 12 realization lower tanks 3.
When the metal mold adjustable pressure casting equipment in the use present embodiment carries out the metal mold counter-pressure casting, can carry out according to following technological process:
At first melted aluminium liquid is poured in the insulation crucible 9, stalk 8 backs of packing into are incubated aluminium liquid.At this moment, middle tank body 2 is aimed at the back through behind following binding ring 15 lock sealings with lower tank 3, open this folding type mechanism, begin to carry out metal type dies 7 and install according to the open form direction of horizontal folding type mechanism 5.When metal type dies 7 is installed, cast gate and the stalk 8 of metal type dies 7 aligned, subsequently metal type dies 7 and horizontal folding type mechanism 5 are coupled together, simultaneously metal type dies 7 is coupled together with vertical folding type mechanism 6.Treat metal type dies 7 and horizontal folding type mechanism 5 be connected with vertical folding type mechanism 6 finish after, mould assembly puts in place.Upper tank body 1 is aimed at locking with middle tank body 2; Mechanical snap ring mechanism locking through upper locking ring 14; Accomplish that upper tank body 1, middle tank body 2 and 3 three sections tank bodies of lower tank are intact closes sealing, this moment, upper tank body 1 was communicated with middle tank body 2 fully, between middle tank body 2 and the lower tank 3 by median septum 4 separations.
After tank body is closed sealing; Open to go up jar air bleeding valve 11 and following jar air bleeding valve 13 simultaneously, to the top of median septum 4 separations, i.e. upper tank body 1 and middle tank body 2 and bottom; Be lower tank 3 is evacuated to technological requirement synchronously through vacuum system negative pressure value, close vacuum system subsequently.Delay time after 3 ~ 5 seconds, open canister incoming gas valve 10 and following canister incoming gas valve 13, to lower tank 3 ventilations, produce the positive differential pressure between median septum 4 upper and lower two parts with this through air-channel system according to technological requirement.At this moment, stalk 8 is full of metal type dies 7 and accomplishes and fill type the aluminium liquid in the insulation crucible 9 in positive differential pressure effect lower edge, keeps filling that the type positive differential pressure is constant to be solidified aluminium liquid pressurize in metal type dies 7 die cavities this moment; After waiting to solidify end; After jar air bleeding valve 11 is accomplished the tank body pressure release with following jar air bleeding valve 13 in the unlatching, open the upper locking ring 14 between upper tank body 1 and the middle tank body 2, behind the upper tank body 9 of slinging; Open the horizontal folding type mechanism 5 that connects metal type dies 7 and vertical folding type mechanism 6; Take out foundry goods, promptly accomplish an operation cycle, next operation cycle process can be carried out according to said process in cleaning metal type dies 7 backs.
Different with metal mold adjustable pressure casting process among the embodiment 1 is; Metal mold counter-pressure casting process is after positive differential pressure condition lower charging type finishes; Do not need to continue simultaneously again to open canister incoming gas valve 10 and keep pressure reduction stably aluminium liquid in metal type dies 7 die cavities to be carried out pressure regulation with following canister incoming gas valve 13 solidifying, aluminium liquid in the die cavity is carried out pressurize solidify and get final product and only continue the original pressure reduction of maintenance.
Embodiment three
Consult Fig. 3, present embodiment provides a kind of application example that metal mold adjustable pressure casting equipment provided by the invention carries out metal-mold low-pressure casting of using.
Metal mold adjustable pressure casting equipment in the present embodiment comprises middle tank body 2 and lower tank 3 successively, passes through binding ring 15 realizations down between middle tank body 2 and the lower tank 3 and locks and separate; Median septum 4 is arranged at tank body 2 bottoms in said, and said median septum 4 is divided into two cavitys with middle tank body 2 with lower tank 3; The metal mold formwork places on the median septum 4 and its upper end flushes with tank body 2 upper ends; Metal type dies 7 is connected with horizontal folding type mechanism 5; Tank body 2 sidewalls during said horizontal folding type mechanism 5 runs through; Because present embodiment do not need the top to loose core, therefore do not need vertical folding type mechanism 6; In the insulation crucible 9 in the lower tank 3 is the aluminium liquid as founding materials in the present embodiment; Stalk 8 is communicated with through the cast gate of the through hole on the median septum 4 with aluminium liquid and metal mold formwork; The air pressure control of following canister incoming gas valve 13 and following jar air bleeding valve 12 realization lower tanks 3.
When the metal mold adjustable pressure casting equipment in the use present embodiment carries out metal-mold low-pressure casting, can carry out according to following technological process:
At first melted aluminium liquid is poured in the insulation crucible 9, stalk 8 backs of packing into are incubated aluminium liquid.At this moment, middle tank body 2 is aimed at the back through behind following binding ring 15 lock sealings with lower tank 3, open this folding type mechanism, begin to carry out metal type dies 7 and install according to the open form direction of horizontal folding type mechanism 5.When metal type dies 7 is installed, cast gate and the stalk 8 of metal type dies 7 aligned, subsequently metal type dies 7 and horizontal folding type mechanism 5 are coupled together.Treat metal type dies 7 be connected with horizontal folding type mechanism 5 finish after, mould assembly puts in place and prepares to pour into a mould, solidify.During low-pressure casting; After tank body is closed sealing; Canister incoming gas valve 13 charges into aluminium liquid and realizes cavity filling process in the metal type dies 7 under opening under the low pressure effect; Fill the type back that finishes and regulate down canister incoming gas valve 13 and crust and solidify, the crust continued that finishes is regulated down canister incoming gas valve 13 and is carried out supercharging and solidify, until solidifying completion.After solidifying end, close down canister incoming gas valve (13), open the horizontal folding type mechanism 5 that connects metal type dies 7, take out foundry goods, promptly accomplish an operation cycle, next operation cycle process can be carried out according to said process in cleaning metal type dies 7 backs.
Different with metal mold counter-pressure casting process among metal mold adjustable pressure casting, the embodiment two among the embodiment one is; Metal-mold low-pressure casting process in the present embodiment is only accomplished foundry goods and is filled type, solidifies under lower tank 3 inlet air conditions, need not set up the upper and lower two-part pressure reduction of tank body.
Embodiment four
Consult Fig. 2, present embodiment provides a kind of application example that metal mold adjustable pressure casting equipment provided by the invention carries out sand mold, investment casting formwork pressure regulation, differential pressure and low pressure casting of using.
Metal mold adjustable pressure casting equipment in the present embodiment comprises upper tank body 1, middle tank body 2 and lower tank 3 successively, realizes locking through upper locking ring 14 and following binding ring 15 respectively between upper tank body 1 and the middle tank body 2, between middle tank body 2 and the lower tank 3 and separates; Median septum 4 is arranged at tank body 2 bottoms in said, and said median septum 4 is divided into two cavitys with middle tank body 2 with lower tank 3; The metal mold formwork places on the median septum 4 and its upper end flushes with tank body 2 upper ends; Sand mold, investment casting formwork are connected with horizontal folding type mechanism 5; Tank body 2 sidewalls during said horizontal folding type mechanism 5 runs through; Because present embodiment needs the top to loose core, therefore the vertical folding type mechanism 6 that is connected with sand mold, investment casting formwork top is arranged simultaneously; Upper tank body 1 top is run through in said vertical folding type mechanism 6; In the insulation crucible 9 in the lower tank 3 is the aluminium liquid as founding materials in the present embodiment; Stalk 8 is communicated with through the cast gate of the through hole on the median septum 4 with aluminium liquid and metal mold formwork; The air pressure control of last canister incoming gas valve 11 and last jar of air bleeding valve 10 realization upper tank bodies 1; The air pressure control of following canister incoming gas valve 13 and following jar air bleeding valve 12 realization lower tanks 3.
When (one) the metal mold adjustable pressure casting equipment in the use present embodiment carries out sand mold, investment casting formwork adjustable pressure casting, can carry out according to following technological process:
At first melted aluminium liquid is poured in the insulation crucible 9, stalk 8 backs of packing into are incubated aluminium liquid.At this moment; Middle tank body 2 is aimed at back through behind following binding ring 15 lock sealings with lower tank 3; Open this folding type mechanism to maximum open location according to the open form direction of horizontal folding type mechanism 5, with sand mold, investment casting formwork cast gate directly aim at stalk 8 mouths of pipe and fixing after, upper tank body 1 is aimed at locking with middle tank body 2; Mechanical snap ring mechanism locking through upper locking ring 14; Accomplish that upper tank body 1, middle tank body 2 and 3 three sections tank bodies of lower tank are intact closes sealing, this moment, upper tank body 1 was communicated with middle tank body 2 fully, between middle tank body 2 and the lower tank 3 by median septum 4 separations.
After tank body is closed sealing; Open to go up jar air bleeding valve 11 and following jar air bleeding valve 13 simultaneously) to the top of median septum 4 separations, i.e. upper tank body 1 and middle tank body 2 are with the bottom; Be lower tank 3 is evacuated to technological requirement synchronously through vacuum system negative pressure value, close vacuum system subsequently.Delay time after 3 ~ 5 seconds, open canister incoming gas valve 10 and following canister incoming gas valve 13, ventilate to lower tank, produce the positive differential pressure between median septum 4 upper and lower two parts with this through air-channel system according to technological requirement.At this moment, stalk 8 is full of sand mold, investment casting formwork to alloy liquid in positive differential pressure effect lower edge in the holding furnace, gets into the adjustable pressure casting crust stage; Continue to open canister incoming gas valve 10 and following canister incoming gas valve 13 simultaneously; Keep pressure reduction stable, thereby make median septum top, be i.e. upper tank body 1 and middle tank body 2, bottom; Be lower tank 3 quick air inlets, the beginning casting solidification process.After solidifying end, after jar air bleeding valve 11 and the following jar air bleeding valve 13 completion tank body pressure releases, open the upper locking ring 14 between upper tank body 1 and the middle tank body 2 in the unlatching, behind the upper tank body 1 of slinging, directly take out sand mold, investment casting formwork after, promptly accomplish an operation cycle.
When (two) the metal mold adjustable pressure casting equipment in the use present embodiment carries out sand mold, investment casting formwork counter-pressure casting, can carry out according to following technological process:
At first melted aluminium liquid is poured in the insulation crucible 9, stalk 8 backs of packing into are incubated aluminium liquid.At this moment; Middle tank body 2 is aimed at back through behind following binding ring 15 lock sealings with lower tank 3; Open this folding type mechanism to maximum open location according to the open form direction of horizontal folding type mechanism 5, with sand mold, investment casting formwork cast gate directly aim at stalk 8 mouths of pipe and fixing after, upper tank body 1 is aimed at locking with middle tank body 2; Mechanical snap ring mechanism locking through upper locking ring 14; Accomplish that upper tank body 1, middle tank body 2 and 3 three sections tank bodies of lower tank are intact closes sealing, this moment, upper tank body 1 was communicated with middle tank body 2 fully, between middle tank body 2 and the lower tank 3 by median septum 4 separations.
After tank body is closed sealing, open simultaneously and go up jar air bleeding valve 11 and following jar air bleeding valve 13, the top of median septum 4 separations; Be upper tank body 1 and middle tank body 2; With the bottom, promptly lower tank 3 is evacuated to the negative pressure value of technological requirement synchronously through vacuum system, closes vacuum system subsequently.Delay time after 3 ~ 5 seconds, open canister incoming gas valve 10 and following canister incoming gas valve 13, ventilate to lower tank, produce the positive differential pressure between median septum 4 upper and lower two parts with this through air-channel system according to technological requirement.At this moment; Stalk is full of sand mold to alloy liquid in positive differential pressure effect lower edge, investment casting formwork is accomplished and filled type in the holding furnace, keeps filling that the type positive differential pressure is constant to be solidified aluminium liquid pressurize in sand mold, the investment casting formwork die cavity this moment, after waiting to solidify end; After jar air bleeding valve 11 is accomplished the tank body pressure release with following jar air bleeding valve 13 in the unlatching; Open the upper locking ring 14 between upper tank body 1 and the middle tank body 2, behind the upper tank body 1 of slinging, take out casting mold; Promptly accomplish an operation cycle, can carry out next operation cycle process according to said process behind cleaning sand mold, the investment casting formwork.
When (two) the metal mold adjustable pressure casting equipment in the use present embodiment carries out sand mold, investment casting formwork low pressure casting, can carry out according to following technological process:
At first melted aluminium liquid is poured in the insulation crucible 9, stalk 8 backs of packing into are incubated aluminium liquid.At this moment; Middle tank body 2 is aimed at back through behind following binding ring 15 lock sealings with lower tank 3; Open this folding type mechanism to maximum open location according to the open form direction of horizontal folding type mechanism 5; With sand mold, investment casting formwork cast gate directly aim at stalk 8 mouths of pipe and fixing after, prepare to carry out low-pressure casting, process of setting.During low-pressure casting; After tank body is closed sealing; Canister incoming gas valve 13 charges into aluminium liquid and realizes cavity filling process in sand mold, the investment casting formwork under opening under the low pressure effect; Fill the type back that finishes and regulate down canister incoming gas valve 13 and crust and solidify, the crust continued that finishes is regulated down canister incoming gas valve 13 and is carried out supercharging and solidify, until solidifying completion.After solidifying end, close down canister incoming gas valve 13, take out casting mold, promptly accomplish an operation cycle, can carry out next operation cycle process according to said process behind cleaning sand mold, the investment casting formwork.
Can know by above four embodiment; The metal mold adjustable pressure casting equipment that the present invention proposes can be realized based on metal mold foundry goods being passed through the cast form of adjustable pressure casting technology; And can be applied to the adjustable pressure casting shaping that sand mold, investment casting formwork and gypsum mould etc. carry out foundry goods, also can be used in counter-pressure casting and low pressure casting shaping that metal mold, sand mold, investment casting formwork and gypsum mould etc. carry out foundry goods simultaneously.Therefore, use very extensively, realized the good combination between adjustable pressure casting and the metal mold.
Claims (2)
1. metal mold adjustable pressure casting equipment; It is characterized in that: comprise upper tank body (1), middle tank body (2) and lower tank (3) successively, realize locking and separating through upper locking ring (14) and following binding ring (15) respectively between upper tank body (1) and the middle tank body (2), between middle tank body (2) and the lower tank (3); Median septum (4) is arranged at tank body (2) bottom in said, and said median septum (4) is divided into two cavitys with middle tank body (2) and lower tank (3); The metal mold formwork places median septum (4) to go up and its upper end flushes with tank body (2) upper end; Metal type dies (7) is connected with horizontal folding type mechanism (5); Middle tank body (2) sidewall is run through in said horizontal folding type mechanism (5); In the insulation crucible (9) in the lower tank (3) is molten metal; Stalk (8) is communicated with through the cast gate of the through hole on the median septum (4) with molten metal and metal mold formwork; Last canister incoming gas valve (11) and last jar of air bleeding valve (10) are realized the air pressure control of upper tank body (1); Following canister incoming gas valve (13) and following jar air bleeding valve (12) are realized the air pressure control of lower tank (3).
2. a metal mold adjustable pressure casting equipment as claimed in claim 1 is characterized in that: the vertical folding type mechanism (6) that is connected with metal type dies (7) top in addition; Upper tank body (1) top is run through in said vertical folding type mechanism (6).
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| CN105665680A (en) * | 2016-04-06 | 2016-06-15 | 杨卫东 | Resistance furnace and control method |
| CN106563786A (en) * | 2016-10-30 | 2017-04-19 | 山西汾西重工有限责任公司 | Differential pressure pouring casting method of particle reinforced aluminum-based composite material |
| CN107866546A (en) * | 2017-12-18 | 2018-04-03 | 广东鸿泰科技股份有限公司 | A kind of hollow Vehicle Frame Design and counter-pressure casting method |
| CN108453240A (en) * | 2018-02-08 | 2018-08-28 | 中国兵器科学研究院宁波分院 | A kind of counter-pressure casting method of armored vehicle water propeller Al-alloy casing |
| CN109550899A (en) * | 2018-11-27 | 2019-04-02 | 上海航天精密机械研究所 | Fusible pattern and counter-pressure casting combined shaping method |
| CN109865818A (en) * | 2018-03-01 | 2019-06-11 | 北京航大新材科技有限公司 | A kind of locking device of counter-pressure casting machine |
| CN115319068A (en) * | 2022-08-31 | 2022-11-11 | 中国兵器装备集团西南技术工程研究所 | Well tank structure and casting machine major structure |
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| CN105665680A (en) * | 2016-04-06 | 2016-06-15 | 杨卫东 | Resistance furnace and control method |
| CN106563786A (en) * | 2016-10-30 | 2017-04-19 | 山西汾西重工有限责任公司 | Differential pressure pouring casting method of particle reinforced aluminum-based composite material |
| CN107866546A (en) * | 2017-12-18 | 2018-04-03 | 广东鸿泰科技股份有限公司 | A kind of hollow Vehicle Frame Design and counter-pressure casting method |
| CN108453240A (en) * | 2018-02-08 | 2018-08-28 | 中国兵器科学研究院宁波分院 | A kind of counter-pressure casting method of armored vehicle water propeller Al-alloy casing |
| CN108453240B (en) * | 2018-02-08 | 2020-04-17 | 中国兵器科学研究院宁波分院 | Differential pressure casting method of aluminum alloy shell for waterborne propulsion device of armored vehicle |
| CN109865818A (en) * | 2018-03-01 | 2019-06-11 | 北京航大新材科技有限公司 | A kind of locking device of counter-pressure casting machine |
| CN109865818B (en) * | 2018-03-01 | 2023-11-03 | 诸城航大新材料技术有限公司 | Locking device of differential pressure casting machine |
| CN109550899A (en) * | 2018-11-27 | 2019-04-02 | 上海航天精密机械研究所 | Fusible pattern and counter-pressure casting combined shaping method |
| CN115319068A (en) * | 2022-08-31 | 2022-11-11 | 中国兵器装备集团西南技术工程研究所 | Well tank structure and casting machine major structure |
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