A die-casting mold with a hot and cold temperature control insert

Abstract

This invention relates to a die-casting mold with a hot and cold temperature control insert, comprising an upper mold, a lower mold, and a mold foot structure. The upper and lower molds are stacked vertically, with an upper mold core and a lower mold core installed between them. A mold cavity structure is provided between the upper and lower mold cores, which are also stacked vertically. A left core-pulling structure and a right core-pulling structure are respectively installed on the left and right sides between the upper and lower molds. The core-pulling ends of the left and right core-pulling structures are joined to enclose the mold cavity structure, making the mold cavity structure columnar. A mold foot structure is installed on the lower end of the lower mold. A double-layer temperature control insert, with its upper end passing through the lower mold and lower mold core, is installed on the lower end surface of the lower mold. The double-layer temperature control insert is inserted into the lower middle position of the mold cavity structure. This invention features mold thermal balance, reduced product shrinkage cavities, improved product quality, and convenient mold opening and part removal.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of die casting mould, in particular to a die casting mould with cold and hot temperature control inserts. BACKGROUND

[0002] When a conventional die casting mould produces a water-cooled motor shell inner sleeve, air shrinkage holes often appear in the product. The main reason for the air shrinkage holes is that the mould and the metal liquid are in contact during the production process, and the mould is cooled by water cooling after forming, which causes the problem of cold and hot inside the mould, so that the inner sleeve is prone to air shrinkage holes. In order to improve the quality of the product and ensure the heat balance inside the mould, the mould needs to be improved. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a die casting mould with cold and hot temperature control inserts, which has the characteristics of achieving mould heat balance, reducing product air shrinkage holes, improving product quality, facilitating mould opening and taking out parts, etc.

[0004] The technical scheme adopted by the present application to solve the technical problem is: a die casting mould with cold and hot temperature control inserts is provided, which comprises an upper mould, a lower mould and a mould foot structure, the upper mould and the lower mould are arranged in a stacked manner, and an upper mould core and a lower mould core are installed between the two, the upper mould core and the lower mould core are arranged in a stacked manner, and a mould cavity structure is arranged between the two, left and right core pulling structures are installed between the left and right sides of the upper mould and the lower mould, the core pulling end of the left and right core pulling structures is connected to and covers the mould cavity structure, so that the mould cavity structure is in a columnar shape, a mould foot structure is installed on the lower end of the lower mould, a double-layer temperature control insert is installed on the lower end surface of the lower mould, the upper end of the double-layer temperature control insert passes through the lower mould and the lower mould core, the double-layer temperature control insert is inserted into the middle position of the lower part of the mould cavity structure, so that the mould cavity structure is in a sleeve structure, the double-layer temperature control insert comprises a lower cooling insert core, a lower forming sleeve and an upper heat preservation sleeve, a circle of cooling flow channels extending from top to bottom is arranged on the outer circle of the lower cooling insert core, the lower forming sleeve is sleeved on the outer circle of the lower cooling insert core, a seal is formed between the lower end of the lower forming sleeve and the lower cooling insert core, the upper heat preservation sleeve is installed on the upper end of the lower forming sleeve, a heat preservation cavity is arranged in the upper heat preservation sleeve, a shunt insert mounting seat is arranged on the upper end of the upper heat preservation sleeve, a water inlet and outlet pipe is installed on the lower end of the lower cooling insert core and connected to the cooling flow channel, and a plurality of heat preservation oil inlet and outlet pipes are installed on the lower end of the lower forming sleeve and inserted into the heat preservation cavity.

[0005] The double-layer temperature control insert is installed to ensure the heat balance in the mold, the upper heat preservation sleeve and the lower forming sleeve are arranged to form a heat preservation cavity, the heat preservation oil inlet and outlet pipes are installed to facilitate continuous injection of heat preservation oil with temperature, the lower cooling insert core and the lower forming sleeve are arranged to form a cooling runner, and the cooling runner is used to facilitate cooling of the inside.

[0006] In the beginning of production, the heat preservation oil is first filled into the heat preservation cavity, so that the mold cavity structure has certain problems, and then the metal liquid is injected into the mold cavity structure. Since the heat preservation oil is injected in advance, the mold itself also has a certain temperature, and after the metal liquid flows in, it will not be too low in temperature to produce instant heating phenomenon, avoiding the production of air shrinkage hole of the product, and then the cooling liquid is injected into the cooling runner to reduce the temperature of the mold and the product. At this time, the heat preservation oil is still being input, so that the temperature can be gradually reduced to avoid instant cooling phenomenon, ensuring that the heat balance in the mold can be achieved during production to improve product quality.

[0007] As a supplement to the technical scheme, the bottom of the heat preservation cavity is provided with a temperature isolation piece which is in contact with the upper end of the lower forming sleeve. In the technical scheme, the heat conduction can be extended to the mold cavity direction by arranging the temperature isolation piece, so as to facilitate rapid increase of the temperature of the upper end of the mold cavity structure, and avoid instant heating phenomenon after contacting with the metal liquid.

[0008] As a supplement to the technical scheme, the inlet and outlet water pipes are two, which are respectively communicated with the starting end and the end of the cooling runner. The inlet and outlet water pipes are arranged to realize the circulation of cooling water.

[0009] As a supplement to the technical scheme, the upper end surface of the upper die is embedded with a gate structure, the lower die below the gate structure is embedded with a flow cone structure, the lower end surface of the lower die core is provided with a flow channel groove structure extending from the rear side of the flow cone structure, the rear end of the flow channel groove structure extends to the core pulling end of the left and right core pulling structures, and forms an annular injection groove, and the annular injection groove corresponds to the mold cavity structure.

[0010] In the technical scheme, the flow channel groove structure is installed to facilitate the concentrated injection of the metal liquid, and the annular injection groove is arranged to facilitate the rapid injection of the metal liquid into the mold cavity structure, thereby improving the filling speed of the metal liquid.

[0011] As a supplement to the technical scheme, the upper side of the core pulling end abutting portion of the left and right core pulling structures is provided with an arc surface boss structure which is convex upward in the middle. The arc surface boss structure is arranged to raise the height of the metal liquid, so as to facilitate the accumulation of potential energy of the metal liquid and improve the injection speed of the metal liquid.

[0012] As a supplement to the technical solution, the shunt insert mounting seat is mounted with a shunt insert, the shunt insert is communicated with the annular injection groove and the mold cavity structure, and the shunt insert is arranged to facilitate the full filling of the molten metal into the mold cavity structure.

[0013] As a supplement to the technical solution, the outer circle of the shunt insert is uniformly provided with a plurality of downward extending spiral injection channels, and the lower end of the spiral injection channel is offset in the counterclockwise direction.

[0014] In the technical solution, the spiral injection channel is arranged to improve the flow speed of the molten metal. When the spiral injection channel is used, a turbine rotating conveying structure is formed, and the flow speed of the molten metal is further improved.

[0015] As a supplement to the technical solution, the lower end of the shunt insert is provided with a circle of outwardly protruding step portions, the upper end face of the step portion is provided with an injection shallow groove corresponding to the lower end of the spiral injection channel, the injection shallow groove facilitates the flow of the molten metal into the mold cavity structure, a sheet-shaped connecting portion is formed in the injection shallow groove, and the connecting portion can be quickly broken when the mold is opened, facilitating the removal of the shunt insert.

[0016] As a supplement to the technical solution, the upper end edge of the upper heat preservation sleeve is uniformly provided with a circle of radial rib grooves, and the radial rib grooves are arranged to facilitate the formation of internal reinforcing ribs of the product.

[0017] As a supplement to the technical solution, the mold foot structure is mounted with an up-and-down moving ejector plate, and the ejector plate is mounted with a circle of ejector pins corresponding to the lower end of the mold cavity structure.

[0018] Beneficial effects: The present application relates to a die casting mold with cold and hot temperature control inserts, which is provided with double-layer temperature control inserts to ensure the heat balance in the mold. The upper heat preservation sleeve and the lower forming sleeve are arranged to form a heat preservation cavity, the heat preservation oil inlet and outlet pipes are arranged to facilitate the continuous injection of heat preservation oil with temperature, and the lower cooling insert core and the lower forming sleeve are arranged to form a cooling flow channel, which is used to facilitate the cooling of the inside. The die casting mold has the characteristics of achieving heat balance, reducing product shrinkage holes, improving product quality, facilitating mold opening and taking out, etc. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the front view of the present application;

[0020] Figure 2 is the top view of the present application;

[0021] Figure 3 is the structure view of the present application;

[0022] Figure 4 is the structure view of the present application Figure 1 is the sectional view of the present application in A-A direction;

[0023] Figure 5 is the structure view of the present application after removing the upper die and the upper die core;

[0024] Figure 6 is the structure view of the double-layer temperature control insert of the present application with products;

[0025] Figure 7 is the structure view of the present application Figure 6 is the sectional view of the present application in B-B direction;

[0026] Figure 8 is the structure view of the double-layer temperature control insert of the present application;

[0027] Figure 9 is the sectional view of the present application in C-C direction; Figure 8

[0028] Figure 10 is the structure view of the flow distribution insert of the present application.

[0029] Fig. 1, upper die, 2, lower die, 3, die foot structure, 4, ejector plate, 5, left core-pulling structure, 6, right core-pulling structure, 7, gate structure, 8, upper die core, 9, lower die core, 10, double-layer temperature control insert, 11, ejector structure, 12, step portion, 13, cavity structure, 14, runner groove structure, 15, flow distribution cone structure, 16, cambered boss structure, 17, annular injection groove, 18, exhaust structure, 19, lower cooling insert core, 20, water inlet and outlet pipeline, 21, heat preservation oil inlet and outlet pipeline, 22, lower forming sleeve, 23, cooling runner, 24, flow distribution insert mounting seat, 25, heat preservation cavity, 26, flow distribution insert, 27, upper heat preservation sleeve, 28, temperature isolation piece, 29, helical injection channel, 30, injection shallow groove, 31, radial rib groove. DETAILED DESCRIPTION

[0030] The present application will be further described with reference to the following specific examples. It should be understood that these examples are intended to illustrate the present application and are not intended to limit the scope of the present application. Furthermore, it should be understood that various modifications and changes can be made to the present application by those skilled in the art upon reading the contents of the present application, and such equivalent forms are also within the scope of the appended claims.

[0031] Embodiments of the present application relate to a die casting mold with cold and hot temperature control inserts, such as Figure 1 — Figure 4 ​As shown, including the upper die 1, lower die 2 and die foot structure 3, the upper die 1 and lower die 2 are arranged in a stack, between which the upper die core 8 and lower die core 9 are mounted, the upper die core 8 and lower die core 9 are arranged in a stack, between which the cavity structure 13 is provided, the left and right sides between the upper die 1 and lower die 2 are respectively provided with left core-pulling structure 5 and right core-pulling structure 6, the core-pulling end of the left core-pulling structure 5 and the right core-pulling structure 6 is butted to cover the cavity structure 13, so that the cavity structure 13 is columnar, the lower end of the lower die 2 is provided with the die foot structure 3, the lower end surface of the lower die 2 is provided with the double-layer temperature control insert 10 which passes through the lower die 2 and the lower die core 9, the double-layer temperature control insert 10 is inserted into the middle position of the lower part of the cavity structure 13, so that the cavity structure 13 is a sleeve structure, the double-layer temperature control insert 10 includes a lower cooling insert core 19, a lower forming sleeve 22 and an upper heat preservation sleeve 27, a circle of cooling flow channels 23 extending spirally from top to bottom is provided on the outer circle of the lower cooling insert core 19, the lower forming sleeve 22 is sleeved on the outer circle of the lower cooling insert core 19, a seal is formed between the lower end of the lower forming sleeve 22 and the lower cooling insert core 19, the upper end of the lower forming sleeve 22 is provided with the upper heat preservation sleeve 27, a heat preservation cavity 25 is arranged in the upper heat preservation sleeve 27, a shunt insert mounting seat 24 is arranged on the upper end of the upper heat preservation sleeve 27, a water inlet and outlet pipe 20 which is connected with the cooling flow channel 23 is arranged on the lower end of the lower cooling insert core 19, a plurality of heat preservation oil inlet and outlet pipes 21 which pass through the lower forming sleeve 22 and are inserted into the heat preservation cavity 25 are arranged on the lower end of the lower forming sleeve 22.

[0032] In the technical solution, the double-layer temperature control insert 10 is installed to ensure the heat balance inside the mold, the upper heat preservation sleeve 27 and the lower forming sleeve 22 are provided to form the heat preservation cavity 25, the heat preservation oil inlet and outlet pipes 21 are installed to facilitate continuous injection of heat preservation oil with temperature, the lower cooling insert core 19 and the lower forming sleeve 22 are provided to form the cooling flow channel 23, which facilitates cooling of the inside.

[0033] In the technical solution, when starting production, the heat preservation oil is first filled into the heat preservation cavity 25, so that the cavity structure has a certain problem, then the metal liquid is injected into the cavity structure 13, because the heat preservation oil is injected in advance, the mold itself also has a certain temperature, after the metal liquid flows in, it will not be too low in temperature to produce instant heating phenomenon, avoiding the product from producing air shrinkage hole, then the cooling liquid is injected into the cooling flow channel 23 after the product is formed, so that the cooling liquid can reduce the temperature of the mold and the product, at this time the heat preservation oil is still continuously input, so that the temperature can be gradually reduced, avoiding instant cooling phenomenon, ensuring that the heat balance inside the mold can be realized during production, improving the product quality.

[0034] As a supplement to the technical solution, the bottom of the heat preservation cavity 25 is provided with a temperature isolation piece 28 which is in contact with the upper end of the lower forming sleeve 22. In the technical solution, the heat conduction is extended to the mold cavity direction by setting the temperature isolation piece 28, so that the temperature of the upper end of the mold cavity structure 13 is quickly increased, and the instant heating phenomenon after contacting with the metal liquid is avoided.

[0035] As a supplement to the technical solution, the water inlet and outlet pipeline 20 is provided with two pipes which are respectively communicated with the starting end and the end of the cooling flow channel 23, and the circulation of the cooling water is realized by setting the water inlet and outlet pipeline 20.

[0036] As a supplement to the technical solution, the upper end face of the upper die 1 is embedded with a gate structure 7, the lower die 2 below the gate structure 7 is embedded with a flow cone structure 15, the lower end face of the lower die core 9 is provided with a flow channel groove structure 14 which extends from the rear side of the flow cone structure 15 to the rear, the rear end of the flow channel groove structure 14 extends to the core pulling end of the left core pulling structure 5 and the right core pulling structure 6, and forms an annular injection groove 17 which corresponds to the mold cavity structure 13.

[0037] In the technical solution, the flow channel groove structure 14 is installed to facilitate the concentrated injection of the metal liquid, and the annular injection groove 17 is provided to facilitate the rapid injection of the metal liquid into the mold cavity structure 13, thereby improving the filling speed of the metal liquid.

[0038] As shown in Figure 5 As a supplement to the technical solution, the upper side of the core pulling end abutting portion of the left core pulling structure 5 and the right core pulling structure 6 is provided with an arc surface boss structure 16 which is upwardly convex in the middle, the arc surface boss structure 16 is provided to raise the height of the metal liquid, facilitate the accumulation of potential energy of the metal liquid, and facilitate the increase of the injection speed of the metal liquid.

[0039] As shown in Figure 10 As a supplement to the technical solution, the flow splitting insert mounting seat 24 is provided with a flow splitting insert 26, the flow splitting insert 26 is communicated with the annular injection groove 17 and the mold cavity structure 13, and the flow splitting insert 26 is provided to facilitate the full filling of the metal liquid into the mold cavity structure 13.

[0040] As a supplement to the technical solution, the outer circle of the flow splitting insert 26 is uniformly provided with a plurality of downwardly extending spiral injection channels 29, and the lower end of the spiral injection channel 29 is offset in the counterclockwise direction.

[0041] In the technical solution, the spiral injection channel 29 is provided to improve the flow speed of the metal liquid, and when in use, the spiral injection channel 29 can form a turbine rotating conveying structure to further improve the flow speed of the metal liquid.

[0042] As a supplement to the technical scheme, the lower end of the flow distribution insert 26 is provided with a step portion 12 protruding outward, the upper end surface of the step portion 12 is arranged with injection shallow grooves 30 corresponding to the lower end of the spiral injection channel 29, the metal liquid flows into the mold cavity structure 13 through the injection shallow grooves 30, the injection shallow grooves 30 guide the formation of a sheet-shaped connecting portion, which can be quickly broken when the mold is opened, facilitating the removal of the flow distribution insert 26.

[0043] As a supplement to the technical scheme, the upper end edge of the upper heat preservation sleeve 27 is uniformly arranged with a circle of radial rib grooves 31, which are used to facilitate the formation of internal reinforcing ribs of the product.

[0044] As a supplement to the technical scheme, the mold foot structure 3 is installed with a top pin plate 4 moving up and down, the top pin plate 4 is installed with a circle of top pin structures 11 corresponding to the lower end of the mold cavity structure 13.

[0045] The upper mold 1 and the lower mold 2 are installed with exhaust structures 18 at the front and rear parts, and there are four exhaust structures 18, which are symmetrically arranged in pairs.

[0046] When using the present mold to produce, first the mold is closed by the mold closing machine, then the heat preservation oil is injected from the heat preservation oil inlet and outlet pipe 21, the heat preservation oil enters the heat preservation cavity, the heat preservation oil warms the mold cavity structure 13, so that the temperature in the mold cavity structure 13 can be maintained between 200 degrees Celsius to 350 degrees Celsius, then the metal liquid flows from the gate structure 7, the metal liquid flows along the runner groove structure 14 to the annular injection groove 17, the annular injection groove 17 injects the metal liquid onto the flow distribution insert 26, the metal liquid is quickly injected into the mold cavity structure 13 through the spiral injection channel 29, since the mold cavity structure 13 itself has a certain temperature, so there is no instant heating phenomenon at this place, so there will be no excessive shrinkage porosity in the product, when the mold cavity structure 13 is filled, cooling water is injected through the inlet and outlet water pipe 20 to cool the product, while cooling, the heat preservation oil is still being continuously input, so the temperature of the mold cavity structure 13 can slowly and continuously decrease, there is no instant cooling phenomenon, further improving the quality of the product, while waiting for the overall cooling, stop the injection of heat preservation oil, finally wait for the mold to completely cool down, open the mold and take out the product, first open the upper mold 1 and the upper mold core 8, then start the left core pulling structure 5 and the right core pulling structure 6, the left core pulling structure 5 and the right core pulling structure 6 complete the core pulling action, then the product and the handle and the flow distribution insert 26 are completely taken out by the mechanical hand, finally a new flow distribution insert 26 is put into the flow distribution insert mounting seat 24, and the mold is closed again, the product taken out, the handle shaped in the shallow groove 30 part is very thin, the thin handle and the product can be quickly separated, then the handle at the spiral injection channel 29 is manually peeled off by the worker, to ensure the secondary use of the flow distribution insert 26.

Claims

1. A die-casting die with cold and hot temperature control inserts, comprising an upper die (1), a lower die (2) and a die cavity structure (13), the upper die (1) and the lower die (2) being arranged in a stacked manner, an upper die core (8) and a lower die core (9) being arranged between the upper die (1) and the lower die (2), the upper die core (8) and the lower die core (9) being provided with the die cavity structure (13) therebetween, characterized in that: The lower end face of the lower mold (2) is provided with a double-layer temperature control insert (10) penetrating the lower mold (2) and the lower mold core (9), the double-layer temperature control insert (10) is inserted into the middle position of the lower part of the mold cavity structure (13), so that the mold cavity structure (13) is in a sleeve structure, the double-layer temperature control insert (10) comprises a lower cooling insert core (19), a lower forming sleeve (22) and an upper heat preservation sleeve (27), a circle of cooling flow channels (23) extending spirally from top to bottom is arranged on the outer circle of the lower cooling insert core (19), the lower forming sleeve (22) is sleeved on the outer circle of the lower cooling insert core (19), the upper heat preservation sleeve (27) is installed on the upper end of the lower forming sleeve (22), the upper heat preservation sleeve (27) is provided with a heat preservation cavity (25) inside, and the upper end of the upper heat preservation sleeve (27) is provided with a shunt insert mounting seat (24).

2. The die-casting mold with cold and hot temperature control inserts according to claim 1, characterized in that: The bottom of the heat preservation cavity (25) is provided with a temperature isolation piece (28) which is in abutment with the upper end of the lower forming sleeve (22).

3. The die-casting mold with cold and hot temperature control inserts according to claim 1, characterized in that: The lower end of the lower cooling insert core (19) is provided with inlet and outlet water pipes (20) which are in abutment with the cooling flow channels (23), and the inlet and outlet water pipes (20) are two in number and are in communication with the starting end and the terminal end of the cooling flow channels (23) respectively.

4. The die-casting mold with cold and hot temperature control inserts according to claim 1, characterized in that: The front part of the upper end face of the upper mold (1) is embedded with a gate structure (7), the lower mold (2) below the gate structure (7) is embedded with a shunt cone structure (15), the lower end face of the lower mold core (9) is provided with a flow channel groove structure (14) extending rearward from the rear side of the shunt cone structure (15), the rear end of the flow channel groove structure (14) extends to the core pulling end of the left core pulling structure (5) and the right core pulling structure (6) and forms an annular injection groove (17), and the annular injection groove (17) corresponds to the mold cavity structure (13).

5. The die casting mold with cold and hot temperature control inserts according to claim 4, characterized in that: The upper side of the abutment position of the core pulling end of the left core pulling structure (5) and the right core pulling structure (6) is provided with an arc surface boss structure (16) which is convex upward in the middle.

6. The die-casting mold with cold and hot temperature control inserts according to claim 4, characterized in that: The shunt insert mounting seat (24) is provided with a shunt insert (26), the shunt insert (26) is in communication with the annular injection groove (17) and the mold cavity structure (13).

7. The die-casting mold with cold and hot temperature control inserts according to claim 6, characterized in that: A plurality of downward extending spiral injection channels (29) are uniformly arranged on the outer circle of the shunt insert (26), and the lower end of the spiral injection channel (29) is offset in the counterclockwise direction.

8. The die casting mold with cold and hot temperature control inserts according to claim 7, characterized in that: The lower end of the shunt insert (26) is provided with a circle of outward convex step portions (12), and the upper end face of the step portion (12) is provided with injection shallow grooves (30) corresponding to the lower end of the spiral injection channel (29) one by one.

9. The cold / hot temperature controlled insert of claim 1, wherein: A circle of radial rib grooves (31) are uniformly arranged at the upper end edge of the upper heat preservation sleeve (27).

10. The die casting mold with cold and hot temperature control inserts of claim 1, wherein: The lower end of the lower mold (2) is provided with a mold foot structure (3), the mold foot structure (3) is provided with a top pin plate (4) moving up and down, and the top pin plate (4) is provided with a circle of top pin structures (11) corresponding to the lower end of the mold cavity structure (13).

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