CN202934097U - Die casting die of cast steel bucket teeth - Google Patents
Die casting die of cast steel bucket teeth Download PDFInfo
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- CN202934097U CN202934097U CN 201220631325 CN201220631325U CN202934097U CN 202934097 U CN202934097 U CN 202934097U CN 201220631325 CN201220631325 CN 201220631325 CN 201220631325 U CN201220631325 U CN 201220631325U CN 202934097 U CN202934097 U CN 202934097U
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Abstract
The utility model discloses a die casting die of cast steel bucket teeth. The die casting die of the cast steel bucket teeth comprises an upper die and a lower die, wherein an upper die cavity is arranged on the bottom face of the upper die, a lower die cavity is arranged on the top face of the lower die, and the upper die cavity and the lower die cavity which are formed after die assembly of the upper die and the lower die form a complete die cavity. The die casting die of the cast steel bucket teeth is characterized in that the rear end of the die cavity is an opening, a sand core which is matched with the opening end is arranged on the opening end, a check block is abutted against the rear end of the sand core, a part of die cavity at the front end of the sand core forms a bucket-tooth-shaped cavity of the die, a material cavity which penetrates through the top face and the bottom face of the lower die is arranged in the lower die, an ingate which is communicated with the bucket-tooth-shaped cavity is arranged on the top of the material cavity, a pressure head is assembled on the bottom of the material cavity, a pressure head sand core is placed on the top of the pressure head, and no sliding blocks or core-pulling mechanism is arranged. According to the die casting die of the cast steel bucket teeth, molding filling of liquid steel is complete, castings have no flaws or air holes, the problem of fusion welding between the liquid steel and the pressure head does not exist, and the phenomenon of separation between a material cavity and a mold cavity does not occur, so that the die casting die of the cast steel bucket teeth is especially suitable for the production of excavator bucket teeth.
Description
Technical field
The utility model relates to the preparation of excavation, loading operation mechanical part in engineering machinery and mining machinery, is specifically related to a kind of die casting of cast steel bucket tooth.
Background technology
Excavator is that a kind of commonly used being used for excavated, engineering machinery and the mining machinery of loading operation.Cast steel bucket tooth is the important component part of excavator.As everyone knows, the main production of existing cast steel bucket tooth is sand casting and model casting.Chinese patent ZL201010220968.7 discloses a kind of new bucket tooth manufacture method, and it utilizes all-metal mould and molten steel is pressurizeed fill type acquisition trolley sawtooth casting.Yet facts have proved, the success rate of all-metal mould is low, and main manifestations is imperfect for filling type, trolley sawtooth casting multiple cracks and pore, have in addition molten steel and pressure head melting welding, slide block and core-pulling mechanism can't proper motions because of thermal expansion, the material chamber with die cavity because of problems such as thermal deformation easily separate.
The utility model content
The purpose of this utility model is to provide a kind of die casting of cast steel bucket tooth, the yield rate of producing to improve bucket tooth.
the die casting of cast steel bucket tooth described in the utility model, comprise upper die and lower die, the bottom surface of patrix is provided with upper cavity, the end face of counterdie is provided with lower mode cavity, after patrix and counterdie matched moulds, described upper cavity and lower mode cavity are the die cavity of complete, the open rearward end of die cavity, openend is adaptive core, there is link stopper on the top, rear end of core, the described cavity section that is positioned at described core front end namely consists of the bucket tooth die cavity of mould, also be provided with the material chamber that connects counterdie end face and bottom surface on described counterdie, the top in material chamber is provided with the ingate that is communicated with described bucket tooth die cavity, the bottom in material chamber is equipped with pressure head, the top of pressure head is placed with the pressure head core.
The rear portion of described core is provided with the blind hole that is opened on the rear end of going deep into core inside, and described link stopper is provided with the steam vent that is communicated with these blind holes, so that exhaust.
Described material chamber is one, and described bucket tooth die cavity has with respect to symmetrical two in described material chamber, so that eject clout and trolley sawtooth casting in the material chamber, and enhance productivity.Certainly, the bucket tooth die cavity can be more according to bucket tooth size or the setting of press parameter, as 4～6 etc.
Described bucket tooth die cavity is symmetrical by the geometric center of die joint between described upper die and lower die, so that Mould Machining and matched moulds operation.
The diameter of described blind hole is 2～5mm, and the diameter of described steam vent is 5～10mm.Suitable aperture is conducive to guarantee the intensity of core and link stopper, plays simultaneously effective exhaust effect.
Fit clearance between described core and described die cavity is that the clearance is 0.1～0.7mm, is preferably 0.3～0.6mm.Reasonably the clearance is convenient to lay core on the one hand, is conducive on the other hand discharge the gas in the bucket tooth die cavity.
The core print length of described core is conducive to stablize core more than or equal to 40mm, secondly can also suppress molten steel ejection too much in cavity filling process.
Fit clearance between described material chamber and described pressure head is 0.3～1.0mm, is preferably 0.5～0.7mm.The gap is too small, and pressure head is easy to locking, excesssive gap, easily bleed-out liquid with the material chamber.
Described core and pressure head core are resin sand core or sodium silicate sand core etc., and external coating has alcohol zircon flour coating.
The thickness of described pressure head core is 5～20mm, is preferably 10～15mm.Reasonably thickness can play the isolation molten steel, prevent the effect of molten steel melting welding pressure head, resists simultaneously the erosion of molten steel and is unlikely defeated and dispersed.
The utility model compared with prior art is some key technologies that the utility model adopts: adopting core is a key technology.Core is compared with metal-cored on the one hand, the absorption heat is few and heat absorption is slow, and getting angry of core can be discharged smoothly by steam vent, the bucket tooth type cavity gas also can be discharged smoothly in the clearance simultaneously, these all are conducive to molten steel forming, facts have proved, even under cold mould state, the bucket tooth die cavity fills type and does not also have problems, the trolley sawtooth casting pore-free.In addition, the dry strength of core is low, and the deflation resistance of trolley sawtooth casting is little, has avoided the crackle that produces because of metal-cored.Another key technology is with pressure head core isolation pressure head and molten steel, has thoroughly eliminated the problem of molten steel melting welding pressure head.
This shows, the utility model in terms of existing technologies, without slide block and core-pulling mechanism, molten steel forming is complete, there is not the problem of molten steel and pressure head melting welding in foundry goods flawless and gas hole defect, and because adopting material chamber and die cavity integral structure to eliminate the phenomenon that separate with the bucket tooth die cavity in the material chamber.
Description of drawings
Fig. 1 is the front view of the utility model embodiment die casting matched moulds state;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the B-B cutaway view of Fig. 2;
Fig. 4 is the C-C cutaway view of Fig. 2;
Fig. 5 is the cutaway view after Fig. 3 removes core and link stopper.
The specific embodiment
The utility model is described in further detail below to reach in conjunction with the drawings embodiment.
as shown in Fig. 1～5, the die casting of the present embodiment cast steel bucket tooth comprises patrix 1 and counterdie 2, the bottom surface of patrix 1 is provided with upper cavity 101, the end face of counterdie 2 is provided with lower mode cavity 201, after patrix 1 and counterdie 2 matched moulds, described upper cavity 101 is the die cavity of complete with lower mode cavity 201, the open rearward end of die cavity, openend is adaptive core 3, in the present embodiment, the core print length of core 3 is 50mm, there is link stopper 4 on the top, rear end of core 3, the described cavity section that is positioned at core 3 front ends namely consists of the bucket tooth die cavity 9 of mould, also be provided with the material chamber 7 that connects counterdie end face and bottom surface on counterdie 2, the top in material chamber 7 is provided with the ingate 8 that is communicated with bucket tooth die cavity 9, the bottom in material chamber 7 is equipped with pressure head 5, the top of pressure head 5 is placed with pressure head core 6, the thickness of pressure head core 6 is 10～15mm.Core 3 and pressure head core 6 are resin sand core, and external coating has alcohol zircon flour coating.
The rear portion of core 3 is provided with several blind holes that is opened on the rear end 301 of going deep into core 3 inside, and link stopper 4 is provided with the steam vent 401 that is communicated with these blind holes 301, and blind hole 301 diameters are 2～5mm, and the diameter of steam vent 401 is 5～10mm.
Described material chamber 7 is one, and described bucket tooth die cavity 9 has with respect to material symmetrical two in chamber 7, and these two bucket tooth die cavities 9 are all symmetrical by the geometric center of die joint between described patrix 1 and counterdie 2.
Clearance between core 3 and die cavity is 0.3～0.6mm.Fit clearance between material chamber 7 and pressure head 5 is 0.5～0.7mm.
The course of work of the utility model die casting is:
(1) counterdie 2 and patrix 1 are fixed by lower table and the upper table of bolt and forcing press, and patrix 1 can along with upper table moves up and down, be realized compression and lock out operation with counterdie 2;
(2) pressure head 5 adopts spiral marking connection with the piston of lower oil cylinder, and lower oil cylinder piston band dynamic head 5 moves up and down;
(3) under counterdie 2 and patrix 1 released state, core 3 correctly is placed in the die cavity position;
(4) lower oil cylinder piston moves up to upper limit, and pressure head 5 stretches out counterdie 2, and pressure head core 6 is placed on the plane on pressure head 5, then moves downward to the lower position with piston;
(5) molten steel is watered pan feeding chamber 7, patrix 1 moves downward rapidly, and compresses counterdie 2, descend oil cylinder piston band dynamic head 5 upwards to push molten steel subsequently, and molten steel is through the squeezed bucket tooth die cavity 9 formation bucket tooths of compressing into of ingate 8;
(6) after the dwell time arrived, patrix 1 separated with counterdie 2, and lower oil cylinder piston moves upward, and band dynamic head 5 moves upward, and ejected clout and trolley sawtooth casting in material chamber 7.
Then, use compressed air to blow floating sand, enter next circulation.Often complete a circulation, expect the basic coating cooling material of water spray chamber, chamber, dope layer can play isolation molten steel and the effect of expecting the chamber wall simultaneously, and coating is also wanted can lubricate.The bucket tooth die cavity sprays water based paint after reaching 300 ℃ through a plurality of circulations and mould temperature.
Claims (10)
1. the die casting of a cast steel bucket tooth, comprise upper die and lower die, the bottom surface of patrix is provided with upper cavity, the end face of counterdie is provided with lower mode cavity, after patrix and counterdie matched moulds, described upper cavity and lower mode cavity are the die cavity of complete, the open rearward end that it is characterized in that described die cavity, openend is adaptive core, there is link stopper on the top, rear end of core, the described cavity section that is positioned at described core front end namely consists of the bucket tooth die cavity of mould, also be provided with the material chamber that connects counterdie end face and bottom surface on described counterdie, the top in material chamber is provided with the ingate that is communicated with described bucket tooth die cavity, the bottom in material chamber is equipped with pressure head, the top of pressure head is placed with the pressure head core.
2. die casting according to claim 1, is characterized in that the rear portion of described core is provided with the blind hole that is opened on the rear end of going deep into core inside, and described link stopper is provided with the steam vent that is communicated with these blind holes.
3. die casting according to claim 2, the diameter that it is characterized in that described blind hole is 2～5mm.
4. die casting according to claim 2, the diameter that it is characterized in that described steam vent is 5～10mm.
5. the described die casting of arbitrary claim according to claim 1 to 4, is characterized in that the clearance between described core and described die cavity is 0.1～0.7mm.
6. the described die casting of arbitrary claim according to claim 1 to 4, is characterized in that the core print length of described core is more than or equal to 40mm.
7. die casting according to claim 5, is characterized in that the clearance between described core and described die cavity is 0.3～0.6mm.
8. the described die casting of arbitrary claim according to claim 1 to 4, is characterized in that the fit clearance between described material chamber and described pressure head is 0.3～1.0mm.
9. die casting according to claim 8, is characterized in that the fit clearance between described material chamber and described pressure head is 0.5～0.7mm.
10. the described die casting of arbitrary claim according to claim 1 to 4, the thickness that it is characterized in that described pressure head core is 5～20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220631325 CN202934097U (en) | 2012-11-23 | 2012-11-23 | Die casting die of cast steel bucket teeth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220631325 CN202934097U (en) | 2012-11-23 | 2012-11-23 | Die casting die of cast steel bucket teeth |
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| Publication Number | Publication Date |
|---|---|
| CN202934097U true CN202934097U (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220631325 Expired - Lifetime CN202934097U (en) | 2012-11-23 | 2012-11-23 | Die casting die of cast steel bucket teeth |
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| CN (1) | CN202934097U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128585A (en) * | 2014-08-22 | 2014-11-05 | 重庆长安汽车股份有限公司 | Core exhaust device of low-pressure casting die for cylinder head |
| CN104399933A (en) * | 2014-10-31 | 2015-03-11 | 区健信 | Production process of metal lamp arm filled with sand cores |
| CN104785751A (en) * | 2015-05-15 | 2015-07-22 | 内蒙古宏达压铸有限责任公司 | Die-casting die |
| CN106424638A (en) * | 2015-08-05 | 2017-02-22 | 天津卡斯特机械有限公司 | Die-casting die of cast steel bucket teeth |
| CN108176834A (en) * | 2018-03-01 | 2018-06-19 | 溧阳市联华机械制造有限公司 | A kind of special chill sand core and preparation method thereof |
-
2012
- 2012-11-23 CN CN 201220631325 patent/CN202934097U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128585A (en) * | 2014-08-22 | 2014-11-05 | 重庆长安汽车股份有限公司 | Core exhaust device of low-pressure casting die for cylinder head |
| CN104128585B (en) * | 2014-08-22 | 2016-02-03 | 重庆长安汽车股份有限公司 | A kind of core exhaust apparatus of cylinder head low pressure casting die |
| CN104399933A (en) * | 2014-10-31 | 2015-03-11 | 区健信 | Production process of metal lamp arm filled with sand cores |
| CN104399933B (en) * | 2014-10-31 | 2017-01-25 | 区健信 | Production process of metal lamp arm filled with sand cores |
| CN104785751A (en) * | 2015-05-15 | 2015-07-22 | 内蒙古宏达压铸有限责任公司 | Die-casting die |
| CN106424638A (en) * | 2015-08-05 | 2017-02-22 | 天津卡斯特机械有限公司 | Die-casting die of cast steel bucket teeth |
| CN108176834A (en) * | 2018-03-01 | 2018-06-19 | 溧阳市联华机械制造有限公司 | A kind of special chill sand core and preparation method thereof |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130515 |