Shell mold

Abstract

The utility model relates to the field of die-casting forming, in particular to a shell die. The shell mold comprises a fixed mold body and a movable mold body corresponding to the fixed mold body, a casting block corresponding to the casting hole is arranged on the movable mold body, a forming cavity I is formed in the fixed mold body, a protruding block I corresponding to the forming cavity I is arranged on the movable mold body, and two communicated feeding cavities are formed in the movable mold body and the casting block. A forming groove is formed in the middle of the protruding block I, two forming rods II are connected to the protruding block I in a sliding mode, a pair of guide blocks are arranged on the movable mold, corresponding sliding ways are arranged on the two guide blocks, inclined movable blocks pushing the forming rods II to move are connected into the two sliding ways in a sliding mode, and a cinder ladle cavity communicated with the forming cavity I is formed in the movable mold. The die-cast fluid raw materials can flow into the cavity of the forming shell from the two positions to conduct one-time forming of the shell with the rib plates in the middle.

Description

Technical Field

[0001] This utility model relates to the field of die casting molding, and more specifically to a shell mold. Background Technology

[0002] The core characteristics of die casting are high pressure and high speed. This allows liquid or semi-liquid metal to quickly fill the mold cavity and cool and solidify under high pressure, thus ensuring the density and surface finish of the parts. Die casting can produce parts with thin walls and complex shapes, such as automobile engine blocks and instrument housings. However, when die casting a shell, the fluid material is generally injected into the mold through a single filling hole and a single flow path. It is not possible to flow the die casting fluid material into the cavity of the shell from two positions to form a shell with ribs in the middle in one step. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a shell mold in which the fluid raw material for die casting can flow into the cavity of the molded shell from two positions to form a shell with ribs in the middle in one step.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A shell mold includes a fixed mold with a casting hole at its lower part and a movable mold corresponding to the fixed mold. The movable mold has a casting block corresponding to the casting hole. The fixed mold has a forming cavity I. The movable mold has a protrusion I corresponding to the forming cavity I. The movable mold and the casting block have two communicating feeding cavities. The protrusion I has a forming groove in its middle. Two forming rods II are slidably connected to the protrusion I. The movable mold has a pair of guide blocks. The two guide blocks have corresponding slides. An inclined moving block that pushes the forming rods II is slidably connected in the two slides. The movable mold has a slag-filled cavity communicating with the forming cavity I.

[0006] Preferably, the fixed mold is provided with an inclined cavity, and the inclined moving block is provided with an inclined block coupled to the inclined cavity.

[0007] Preferably, the fixed mold is provided with a slanted rod, and the slanted moving block is provided with a slanted hole coupled to the slanted rod.

[0008] Preferably, the fixed mold is provided with multiple rectangular slots, and the inclined moving block is provided with a rectangular block coupled to the multiple rectangular slots.

[0009] Preferably, the fixed mold is provided with multiple positioning rods at the four corners, and the moving mold is provided with positioning holes that are coupled to the multiple positioning rods.

[0010] Preferably, the fixed mold is provided with a plurality of forming rods I located in the forming cavity I, and the moving mold is provided with forming rods IV coupled to the plurality of forming rods I.

[0011] Preferably, the end faces of the fixed mold and the moving mold that are coupled together are both stepped surfaces.

[0012] Preferably, the axes of the two forming rods II are at an acute angle to the coupling end face of the moving mold.

[0013] Preferably, when the fixed mold and the moving mold are coupled, the end faces of the two forming rods II are in contact with the fixed mold.

[0014] Preferably, the fixed mold is provided with a forming rod III that is coupled to the two forming rods II into a cylindrical shape.

[0015] The beneficial effects of this shell mold are as follows: the fluid raw material for die casting can flow into the cavity of the shell from two positions to form a shell with ribs in the middle in one step; it can avoid uneven distribution of fluid raw material during shell forming, which would lead to different cooling temperatures and cooling times and affect the forming quality of the shell; it can also form two through holes with axes at an angle to the coupling surface of the mold by two sliding cylinders with acute angles to the coupling surface of the mold; and it can also enhance the accuracy of mold coupling and increase the precision of the formed shell by the mutual coupling of multiple sets of positioning structures. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0017] Figure 1 This is a schematic diagram of the outer shell and multiple through holes I;

[0018] Figure 2 This is a structural diagram of the outer shell and ribs;

[0019] Figure 3 This is a schematic diagram of the outer shell and through hole II;

[0020] Figure 4 This is a schematic diagram of the shell forming mold;

[0021] Figure 5 This is a side view of the shell forming mold;

[0022] Figure 6 This is a schematic diagram of the mold structure;

[0023] Figure 7 A structural diagram of the cavity for forming the shell using a fixed mold;

[0024] Figure 8 A front view of the cavity of the molded housing;

[0025] Figure 9 A schematic diagram of the moving mold;

[0026] Figure 10 A schematic diagram of the cavity structure for the moving mold forming shell;

[0027] Figure 11 This is a front view of the cavity of the moving mold forming the shell;

[0028] Figure 12 This is a structural schematic diagram of the shell and the moving mold;

[0029] Figure 13 This is a schematic diagram showing the position of forming rod II.

[0030] Attached diagram: Outer shell 01, through hole I 02, rib plate 03, through hole II 04, fixed mold 11, casting hole 12, positioning rod 13, forming cavity I 14, inclined cavity 15, inclined rod 16, rectangular groove 17, forming rod I 18, moving mold 21, casting block 22, positioning hole 23, protrusion I 24, inclined block 25, inclined hole 26, rectangular block 27, forming rod IV 28, forming rod II 29, guide block 31, inclined moving block 32, slide 33, feeding cavity 41, forming groove 42, slag bag cavity 43. Detailed Implementation

[0031] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0032] Example 1: See details Figures 1 to 13 This describes the process of forming the shell.

[0033] A housing includes an outer shell 01, with through holes I 02 formed in one piece at each of the four corners of the outer shell 01, and a rib 03 formed in one piece at the middle of the outer shell 01. The other end of the outer shell 01 away from the multiple through holes I 02 is a curved surface, on which two through holes II 04 are formed in one piece. The aluminum casting of the housing is performed using a housing mold, which includes a fixed mold 11 with casting holes 12 at its lower part and a movable mold 21 corresponding to the fixed mold 11. The movable mold 21 is provided with casting blocks 22 corresponding to the casting holes 12, and the fixed mold 11 is provided with forming blocks. Cavity I14, the moving mold 21 is provided with a protrusion I24 corresponding to the forming cavity I14, the moving mold 21 and the casting block 22 are provided with two connected feeding cavities 41, the protrusion I24 is provided with a forming groove 42 in the middle, and two forming rods II29 are slidably connected to the protrusion I24, the moving mold 21 is provided with a pair of guide blocks 31, the two guide blocks 31 are provided with corresponding slides 33, and the two slides 33 are slidably connected with inclined moving blocks 32 that push the forming rods II29 to move, and the moving mold 21 is provided with a slag-filled cavity 43 that communicates with the forming cavity I14. The fixed mold 11 is provided with multiple forming rods I18 located in the forming cavity I14, and the moving mold 21 is provided with forming rods IV28 coupled to the multiple forming rods I18.

[0034] When casting the aluminum shell, the moving mold 21 is first driven by a power source to slide linearly and couple with the fixed mold 11. The moving mold 21 drives the casting block 22 to move and insert into the casting hole 12. The casting block 22 is a rod-shaped piece with a variable diameter, which can add molten casting material through the casting hole 12. The fluid material is pushed from the casting hole 12 into the forming cavity I 14 by rapid pushing. The cavity between the forming cavity I 14 and the protrusion I 24 is used to form the shell 01, and the forming groove 42 is used to form the rib 03, which enhances the strength of the shell 01.

[0035] Fluid raw material flows through casting hole 12 and two feeding chambers 41 into molding chamber I14 to form the shell. The fluid raw material required at one end of the multiple through holes I02 on the shell 01 is much greater than that at the other end. The setting of two feeding chambers 41 can ensure that when the fluid raw material enters the molding chamber I14 and couples with the protrusion I24 to form the cavity of the shell, the fluid raw material is quickly supplied to one end of the multiple through holes I02. Then the fluid raw material is supplied from the bottom up and flows synchronously from both sides to the molding groove 42 until the molding groove 42 is filled and the rib 03 is formed. This prevents the rib 03 from being incompletely formed due to uneven or slow fluid raw material supply, which would result in the shell not meeting the standards and requirements.

[0036] The two feeding chambers 41 ensure that the fluid material fills the cavity of the forming cavity I14 and the protrusion I24 after coupling, and is used to form the shell. This ensures that the fluid material cools and solidifies as synchronously as possible, reducing the large temperature difference in different parts of the formed shell caused by slow fluid material supply, which would affect the forming quality of the shell. When the moving mold 21 slides linearly and couples with the fixed mold 11, the two forming rods II29 fit into the forming cavity I14 on the fixed mold 11. The two forming rods II29 are used to form two through holes II04, which can be formed in one step with higher precision. This eliminates the need for subsequent drilling of the shell and speeds up the shell processing.

[0037] When the moving mold 21 slides linearly and couples with the fixed mold 11, the two guide blocks 31 slide on the slide rail 33 to push the two forming rods II 29, ensuring that the two forming rods II 29 fit with the forming cavity I 14. After the forming is completed, when the shell is pushed out, the two guide blocks 31 can be reset under the drive of external force, preparing for the next forming process.

[0038] When the moving mold 21 linearly slides and couples with the fixed mold 11, multiple forming rods I 18 and multiple forming rods IV 28 are coupled to form multiple through holes I 02, thereby forming the outer shell 01, its multiple through holes I 02, the internal rib plate 03, and two through holes II 04 in one step. This process forms a complex shell, speeds up the shell processing, and enables high-precision, high-speed shell production. Multiple slag cavities 43 are used to hold slag ladles, which filter impurities and oxides and can discharge gases generated during the aluminum melt flow, reducing defects such as porosity.

[0039] Example 2: See details Figures 7 to 9 This describes the process by which the driving guide block 31 slides on the slide rail 33 to push the two forming rods II29 to fit into the forming cavity I14 to form the forming through hole II04 when the moving mold 21 is coupled with the fixed mold 11.

[0040] The fixed mold 11 is provided with an inclined cavity 15, and the inclined block 32 is provided with an inclined block 25 coupled to the inclined cavity 15. The fixed mold 11 is provided with an inclined rod 16, and the inclined block 32 is provided with an inclined hole 26 coupled to the inclined rod 16. When the moving mold 21 slides linearly and couples with the fixed mold 11, the inclined block 25 slides into the inclined cavity 15. During the linear sliding of the moving mold 21, the inclined cavity 15 guides the inclined block 25 and limits the sliding direction of the inclined block 25. The inclined rod 16 is inserted into the inclined hole 26, and the inclined rod 16 limits the sliding direction of the inclined block 32, so that the movement of the inclined block 32 and the inclined block 25 are consistent. This ensures that when the moving mold 21 slides linearly and couples with the fixed mold 11, the inclined block 32 and the inclined block 25 move along a predetermined trajectory to push the two forming rods II 29 so that the two forming rods II 29 fit into the forming cavity I 14, preparing for the forming of the two through holes II 04.

[0041] Example 3: See details Figure 4 and 7 Section 9 explains the process of increasing positioning accuracy when the moving mold 21 slides linearly and couples with the fixed mold 11;

[0042] The fixed mold 11 is provided with multiple rectangular slots 17, and the inclined moving block 32 is provided with rectangular blocks 27 coupled to the multiple rectangular slots 17. When the moving mold 21 slides linearly and couples with the fixed mold 11, the coupling is achieved by inserting the multiple rectangular blocks 27 into the multiple rectangular slots 17, thereby ensuring the accuracy of the coupling between the molding cavity I14 and the protrusion I24 and improving the accuracy of the molding process.

[0043] Example 4: See details Figures 4 to 9 This explains the process of increasing positioning accuracy when the moving mold 21 slides linearly and couples with the fixed mold 11;

[0044] The fixed mold 11 is provided with multiple positioning rods 13 at its four corners, and the moving mold 21 is provided with positioning holes 23 that are coupled to the multiple positioning rods 13.

[0045] Thus, when the moving mold 21 slides linearly, multiple positioning rods 13 are first inserted into multiple positioning holes 23 for initial positioning. Then, as the moving mold 21 continues to slide linearly, multiple rectangular blocks 27 are inserted into multiple rectangular slots 17 to achieve coupling and further positioning. The multiple positioning rods 13 can be set to a gradually changing shape with the end diameter smaller than the root diameter. As the moving mold 21 slides linearly, the multiple positioning holes 23 gradually fit onto the root of the multiple positioning rods 13, gradually increasing the positioning accuracy and ensuring the precision of the formed shell.

[0046] Example 5: See details Figures 4 to 9 This explains the process of increasing positioning accuracy when the moving mold 21 slides linearly and couples with the fixed mold 11;

[0047] The end faces of the fixed mold 11 and the moving mold 21 that are coupled together are both stepped surfaces.

[0048] This ensures that after the moving mold 21 slides linearly to the point where multiple positioning rods 13 and multiple positioning holes 23 are coupled, the stepped surface of the fixed mold 11 is coupled with the stepped surface of the moving mold 21. This enhances the accuracy of the coupling between the forming cavity I 14 and the protrusion I 24. At the same time, the coupling of the stepped surface relative to the plane can play a similar role to clamping, ensuring the accuracy of the coupling between the fixed mold 11 and the moving mold 21, thereby ensuring the accuracy of the coupling between the forming cavity I 14 and the protrusion I 24 and improving the precision of the formed shell.

[0049] Example 6: See details Figures 9 to 13 This describes the process by which two forming rods II29 form two through holes II04 on the curved surface of the outer shell 01, away from the other end of the multiple through holes I02;

[0050] The axes of the two forming rods II29 are both at an acute angle to the coupling end face of the moving mold 21, so that the axes of the two forming rods II29 are at an angle to the axes of multiple through holes I02, thus forming multiple through holes I02 with axes perpendicular to the coupling surface of the moving mold 21, and two through holes II04 with axes not perpendicular to the coupling surface of the moving mold 21 in one step.

[0051] Example 7: See details Figure 7 , 8 13, which describes the process of forming two through holes II04;

[0052] The fixed mold 11 is provided with a forming rod Ⅲ that is coupled to the two forming rods Ⅱ29 into a cylindrical shape. Thus, when the fixed mold 11 and the moving mold 21 are coupled, the two forming rods Ⅱ29 and the two forming rods Ⅲ are coupled into a complete cylindrical shape. The two through holes Ⅱ04 are formed through the coupled cylindrical shape. Alternatively, a circular groove coupled to the two forming rods Ⅱ29 can be provided on the fixed mold 11. The ends of the two forming rods Ⅱ29 are inserted into the circular groove so that the complete cylindrical part is used to form the two through holes Ⅱ04.

[0053] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A housing mold comprising a fixed mold (11) provided with a casting hole (12) at a lower portion, and a movable mold (21) provided corresponding to the fixed mold (11), the movable mold (21) being provided with a casting block (22) corresponding to the casting hole (12), characterized in that: The fixed mold (11) is provided with a forming cavity I (14), the movable mold (21) is provided with a protrusion I (24) corresponding to the forming cavity I (14), the movable mold (21) and the casting block (22) are provided with two communicating feeding cavities (41), the middle part of the protrusion I (24) is provided with a forming groove (42), the protrusion I (24) is slidably connected with two forming rods II (29), the movable mold (21) is provided with a pair of guide blocks (31), the two guide blocks (31) are provided with corresponding slides (33), the two slides (33) are slidably connected with inclined blocks (32) for driving the forming rods II (29) to move, and the movable mold (21) is provided with a ladle cavity (43) communicating with the forming cavity I (14).

2. A shell mold according to claim 1, wherein: The fixed mold (11) is provided with an inclined cavity (15), and the inclined block (32) is provided with an inclined block (25) coupled with the inclined cavity (15).

3. A shell mold according to claim 1, wherein: The fixed mold (11) is provided with an inclined rod (16), and the inclined block (32) is provided with an inclined hole (26) coupled with the inclined rod (16).

4. A shell mold according to claim 1, wherein: The fixed mold (11) is provided with a plurality of rectangular grooves (17), and the inclined block (32) is provided with a rectangular block (27) coupled with the plurality of rectangular grooves (17).

5. A shell mold according to claim 1, wherein: The fixed mold (11) is provided with a plurality of positioning rods (13) at four corners, and the movable mold (21) is provided with positioning holes (23) coupled with the plurality of positioning rods (13).

6. A shell mold according to claim 1, wherein: The fixed mold (11) is provided with a plurality of forming rods I (18) in the forming cavity I (14), and the movable mold (21) is provided with forming rods IV (28) coupled with the plurality of forming rods I (18).

7. A shell mold according to claim 1, wherein: The end faces of the fixed mold (11) and the movable mold (21) are both stepped faces.

8. A shell mold according to claim 1, wherein: The axes of the two forming rods II (29) form an acute angle with the coupling end face of the movable mold (21).

9. A shell mold according to claim 1, wherein: When the fixed mold (11) and the movable mold (21) are coupled, the end faces of the two forming rods II (29) are in contact with the fixed mold (11).

10. A shell mold according to claim 1, wherein: The fixed mold (11) is provided with forming rods III coupled with the two forming rods II (29) to form a cylindrical shape.

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