Pouring mold for machining cylinder head casting for excavator

Abstract

The utility model relates to a pouring mold for machining a cylinder head casting for an excavator, and belongs to the technical field of casting, the pouring mold comprises an upper pressing mold, a lower pressing mold and a mold core assembly, the mold core assembly comprises a mold core, a pouring channel and a dead head, and the mold core comprises a center column and a forming section which are integrally formed; the forming section comprises an end face positioning forming block, a cylindrical section, a bent transition section and a top forming block. The internal structural layout of the mold is reasonable, the mold core structure is simple and tidy, modeling is convenient, the positioning groove and the placing groove matched with the mold core are formed in the lower pressing mold, a worker can place the mold core conveniently, the production efficiency is greatly improved, meanwhile, molten metal gradually overflows the whole molding cavity upwards from the bottom of the molding cavity, and the production efficiency is greatly improved. And shrinkage cavities generated during shrinkage of the casting are transferred into the risers through the risers, so that it can be ensured that the surface of the formed casting does not have large cracks and air holes, and the quality of produced products is good.

Description

Technical Field

[0001] The present application relates to the technical field of casting, and in particular to a casting mold for processing a cylinder head casting for an excavator. Background Art

[0002] Currently, for Figure 1 The cylinder head casting 6 for the excavator shown is generally cast by a casting process during production.

[0003] Casting molding has particularly high requirements for mold research and development. The current casting mold has an unreasonable structural layout, and there will be large cracks and pores on the surface of the molded product. Therefore, our company has redesigned the current mold to improve the molding quality of the product. Utility Model Content

[0004] The purpose of the present application is to provide a casting mold for processing a cylinder head casting for an excavator, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the present application provides a casting mold for processing a cylinder head casting for an excavator, which adopts the following technical solution:

[0006] A casting mold for processing a cylinder head casting for an excavator, comprising an upper die, a lower die and a core assembly, the core assembly comprising a core, a casting channel and a riser, the core comprising an integrally formed central column and a molding section, the molding section comprising an end face positioning molding block, a cylindrical section, a curved gradient section and a top molding block, the top molding block being connected to the top of the central column, and the bottom end surface of the top molding block and the upper surface of the central column being in the same plane, the riser being fixed to the side position of the top end surface of the central column, an annular protrusion being fixed to the position of the central column near the bottom end, and the casting channel comprising a sprue, a runner and an ingate connected in sequence;

[0007] The upper surface of the lower die is provided with a lower die cavity used in conjunction with the core, the lower die cavity comprises a positioning groove, a lower molding groove and a placement groove which are connected in sequence, the positioning groove is adapted to the positioning molding block, the placement groove is adapted to the annular protrusion, the upper surface of the lower die is also provided with a groove for placing the inner runner and a bottom clearance groove for placing the horizontal runner, the groove is connected to the lower molding groove;

[0008] The lower surface of the upper die is provided with an upper cavity used in conjunction with the core, the upper cavity includes a top molding groove and a riser groove that are connected, the inner wall of the top molding groove is also provided with a stuffy groove that is compatible with the top molding block, and the lower surface of the upper die is also provided with a top giveway groove for placing a cross runner and a through hole for placing a straight runner.

[0009] Preferably, a square filter sheet can filter out large particles of impurities in the casting liquid, and a square filter sheet is placed between the straight runner and the cross runner.

[0010] The surface of the lower forming groove is also provided with a plurality of evenly distributed circular pancake-shaped forming holes.

[0011] Preferably, in order to facilitate pouring of molten metal, a pouring cup is connected to the upper die, and the pouring cup is connected to the through hole.

[0012] The straight runner is vertically connected to the middle of the horizontal runner, and the number of the ingates is four, and the four ingates are symmetrically connected to the two sides of the horizontal runner.

[0013] To sum up, the present application includes at least one of the following beneficial technical effects: the internal structure layout of the casting mold for processing the cylinder head casting for the excavator is relatively reasonable, the core structure is simple and neat, and it is easy to shape. The lower die is provided with a positioning groove and a placement groove matching the core, which is beneficial for the staff to place the core, greatly improving the production efficiency. At the same time, the molten metal gradually overflows the entire molding cavity from the bottom of the molding cavity, and transfers the shrinkage holes generated when the casting shrinks to the riser through the riser, which can ensure that there will be no large cracks and pores on the surface of the casting after molding, and the quality of the products produced is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram used to reflect the cylinder head casting in the prior art.

[0015] Figure 2 It is a schematic diagram of the overall structure explosion of an embodiment of the present application.

[0016] Figure 3 It is a schematic diagram of the structure of the lower die in the embodiment of the present application.

[0017] Figure 4 It is a schematic diagram of the structure of the core in the embodiment of the present application.

[0018] Figure 5 It is a schematic diagram of the structure of the upper die in the embodiment of the present application.

[0019] Figure 6 It is a schematic diagram of the structure used to reflect the upper die in the open mold state in the embodiment of the present application.

[0020] Explanation of the reference numerals: 1. upper die; 11. top molding groove; 111. stuffing groove; 12. riser groove; 13. top clearance groove; 14. through hole; 2. lower die; 21. positioning groove; 22. lower molding groove; 221. pancake-shaped molding stuffing hole; 23. placement groove; 24. groove; 25. bottom clearance groove; 31. core; 311. center column; 3111. annular protrusion; 312. end face positioning molding block; 313. cylindrical section; 314. curved gradient section; 315. top molding block; 32. riser; 41. sprue; 42. runner; 43. ingent; 5. pouring cup. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-6 This application is described in further detail.

[0022] The present application embodiment discloses a casting mold for processing a cylinder head casting for an excavator, referring to Figure 1-6 , including an upper die 1, a lower die 2 and a core 31 assembly, the core 31 assembly including a core 31, a pouring channel and a riser 32, the core 31 includes an integrally formed central column 311 and a forming section, the forming section includes an end surface positioning forming block 312, a cylindrical section 313, a curved gradient section 314 and a top forming block 315, the top forming block 315 is connected to the top of the central column 311, and the bottom end surface of the top forming block 315 is in the same plane as the upper surface of the central column 311, and the riser 32 is fixed to the top end surface of the central column 311 The side position of the central column 311 is fixed with an annular protrusion 3111 near the bottom end. The pouring channel includes a straight runner 41, a horizontal runner 42 and an ingode 43 which are connected in sequence. The straight runner 41 is vertically connected to the middle of the horizontal runner 42. There are four ingodes 43, which are symmetrically connected to the two sides of the horizontal runner 42. A square filter (not shown in the figure) is placed between the straight runner 41 and the horizontal runner 42. The square filter can filter large particles of impurities in the casting liquid to improve the quality of the casting.

[0023] Reference Figure 3 The upper surface of the lower die 2 is provided with a lower cavity used in conjunction with the core 31, and the lower cavity includes a positioning groove 21, a lower molding groove 22 and a placement groove 23 which are connected in sequence, the positioning groove 21 is adapted to the positioning molding block, and the placement groove 23 is adapted to the annular protrusion 3111, and the upper surface of the lower die 2 is also provided with a groove 24 for placing the inner runner 43 and a bottom clearance groove 25 for placing the horizontal runner 42, the groove 24 is connected to the lower molding groove 22, and the surface of the lower molding groove 22 is also provided with a plurality of annularly evenly distributed pancake-shaped molding holes 221;

[0024] Reference Figure 4The lower surface of the upper die 1 is provided with an upper cavity used in conjunction with the core 31, and the upper cavity includes a top molding groove 11 and a riser groove 12 that are connected to each other. The inner wall of the top molding groove 11 is also provided with a stuffy groove 111 that is compatible with the top molding block 315. The lower surface of the upper die 1 is also provided with a top giveway groove 13 for placing the cross runner 42 and a through hole 14 for placing the straight runner 41.

[0025] Reference Figure 2 In order to facilitate pouring of molten metal, a pouring cup 5 is connected to the upper die 1 , and the pouring cup 5 is connected to the through hole 14 .

[0026] The implementation principle of a pouring mold for processing a cylinder head casting for an excavator in the embodiment of the present application is as follows:

[0027] The staff puts the pressed core 31 into the lower cavity. Specifically, the end face positioning molding block 312 is placed in the positioning groove 21, and the center column 311 is placed in the placement groove 23. Then the pouring channel is placed in the groove 24 and the bottom clearance groove 25 in the lower die 2. Finally, the upper die 1 and the lower die 2 are molded together, and a molding cavity is formed between the upper die 1, the lower die 2 and the core 31. After the mold is closed, the molten metal enters the ingrowth 43 from the straight runner 41 and the cross runner 42, and enters the molding cavity through the ingrowth 43. The molten metal gradually overflows the entire molding cavity from the bottom of the molding cavity, and transfers the shrinkage cavity generated when the casting shrinks to the riser 32 through the riser 32, thereby ensuring that there will be no large cracks and pores on the surface of the casting after molding.

[0028] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A casting mold for processing a cylinder head casting for an excavator, characterized in that: The invention comprises an upper die (1), a lower die (2) and a core (31) component, wherein the core (31) component comprises a core (31), a pouring channel and a riser (32), wherein the core (31) comprises an integrally formed central column (311) and a forming section, wherein the forming section comprises an end face positioning forming block (312), a cylindrical section (313), a curved gradient section (314) and a top forming block (315), wherein the top forming block (315) is connected to the top of the central column (311), and the bottom end surface of the top forming block (315) and the upper surface of the central column (311) are in the same plane, wherein the riser (32) is fixed to the side position of the top end surface of the central column (311), and an annular protrusion (3111) is fixed to the position near the bottom end of the central column (311), and the pouring channel comprises a sprue (41), a runner (42) and an inner runner (43) which are connected in sequence, The upper surface of the lower die (2) is provided with a lower cavity for use with the core (31), the lower cavity comprising a positioning groove (21), a lower molding groove (22) and a placement groove (23) which are connected in sequence, the positioning groove (21) is adapted to the positioning molding block, the placement groove (23) is adapted to the annular protrusion (3111), the upper surface of the lower die (2) is also provided with a groove (24) for placing the inner runner (43) and a bottom clearance groove (25) for placing the horizontal runner (42), the groove (24) is connected to the lower molding groove (22), The lower surface of the upper die (1) is provided with an upper cavity for use with the core (31), the upper cavity comprising a top molding groove (11) and a riser groove (12) which are connected to each other, the inner wall of the top molding groove (11) is also provided with a stuffing groove (111) which is compatible with the top molding block (315), and the lower surface of the upper die (1) is also provided with a top clearance groove (13) for placing a horizontal runner (42) and a through hole (14) for placing a straight runner (41).

2. The pouring mold for processing the cylinder head casting for an excavator according to claim 1, characterized in that: A square filter sheet is placed between the sprue (41) and the cross runner (42).

3. The pouring mold for processing the cylinder head casting for an excavator according to claim 1, characterized in that: The surface of the lower forming groove (22) is also provided with a plurality of evenly distributed circular pancake-shaped forming holes (221).

4. The pouring mold for processing the cylinder head casting for an excavator according to claim 1, characterized in that: The upper die (1) is also connected to a pouring cup (5), and the pouring cup (5) is in communication with the through hole (14).

5. The pouring mold for processing the cylinder head casting for an excavator according to claim 1, characterized in that: The sprue (41) is vertically connected to the middle of the runner (42), and the number of the ingates (43) is four, and the four ingates (43) are symmetrically connected to the two sides of the runner (42).

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