CN211135407U

CN211135407U - Detachable engine cylinder body sand casting mould

Info

Publication number: CN211135407U
Application number: CN201922208006.9U
Authority: CN
Inventors: 黄波
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-07-31
Anticipated expiration: 2029-12-11

Abstract

The utility model discloses a detachable sand casting mould for an engine cylinder, which belongs to the field of sand casting moulds for engine cylinders and comprises an upper mould and a lower mould; the upper die and the lower die are combined, and a cavity is formed inside the upper die and the lower die; the upper die is provided with a plurality of sand shooting holes, and the sand shooting holes are used for injecting molding sand into the cavity; the lower surface of the upper die is fixedly provided with a plurality of hanging blocks, and the hanging blocks are used for molding sand; the hanging block is detachably connected with the upper die. The utility model discloses a detachable engine cylinder body sand type casting mould solves traditional mould and adds man-hour, and the terrace die interval is too little, and milling cutter advances not to go, and the mould can not all assemble into holistic defect, avoids the not enough problem of rigidity that the partial assembly mode brought.

Description

Detachable engine cylinder body sand casting mould

Technical Field

The utility model belongs to engine cylinder body sand mold casting mould field, specifically speaking relate to a detachable engine cylinder body sand mold casting mould.

Background

The production of the engine cylinder block castings belongs to the mass and specialized stream production property, the product structure is complex, the casting difficulty is high, the corresponding production procedures are multiple, the requirements of process equipment are high, and the complex inner cavity and appearance structure are realized, and the thin wall and high-precision blank size is also required.

The existing engine cylinder block type casting is cast by sand mold. Sand casting refers to a casting process that produces a casting in a sand mold. Steel, iron and most nonferrous metal castings can be obtained by sand casting. The molding material used for sand casting is cheap and easy to obtain, the casting mould is simple and convenient to manufacture, and the casting mould can adapt to single-piece production, batch production and mass production of castings, and is a basic process in casting production for a long time.

The method comprises the following steps that (1) a mould for manufacturing a sand mould is inevitably involved in sand mould casting, the mould comprises an upper mould and a lower mould, and various bulges and depressions are formed on the lower surface of the upper mould and the upper surface of the lower mould to mold molding sand; sometimes, due to structural requirements or saving of molding sand, the gap between the protrusions needs to be reduced to a certain degree, but the upper die or the lower die integrally formed by the structure is inconvenient for milling cutter machining, and the milling cutter cannot enter the gap; there is also a problem that the upper mold or the lower mold is divided into a plurality of parts in the same row, but cannot be assembled as a whole, resulting in insufficient rigidity.

SUMMERY OF THE UTILITY MODEL

The utility model aims at above-mentioned weak point provide a detachable engine cylinder body sand casting mould, the last mould of trying to solve current integrated into one piece or the lower mould milling cutter processing of being not convenient for, milling cutter can't get into the clearance, will go up mould or bed die and divide into a plurality of parts, nevertheless can't assemble into wholly, brings the not enough problem of rigidity. In order to achieve the above object, the utility model provides a following technical scheme:

a detachable sand casting mould for an engine cylinder block comprises an upper mould and a lower mould; the upper die and the lower die are combined, and a cavity is formed inside the upper die and the lower die; the upper die is provided with a plurality of sand shooting holes, and the sand shooting holes are used for injecting molding sand into the cavity; the lower surface of the upper die is fixedly provided with a plurality of hanging blocks, and the hanging blocks are used for molding sand; the hanging block is detachably connected with the upper die. According to the structure, the molding sand is injected into the cavity formed by the combined upper die and lower die through the sand shooting hole, and the molding sand forms a shape attached to the hanging block; the molding sand is filled in the gaps among the hanging blocks; because the existing bulge or convex die and the upper die are integrally formed, when the bulge or convex die requires a smaller distance in processing, the milling cutter cannot extend into the machining tool, the bulge or convex die is used as a detachable hanging block, and the hanging block is separately machined and then fixed on the lower surface of the upper die, so that the problem that the distance is small and the machining tool cannot be machined can be solved, and the integral rigidity of the die cannot be influenced; in addition, when the gaps among the hanging blocks are small, a large amount of molding sand is saved in batch production, and the cost is saved.

Further, the hanging block comprises a convex part and a mounting part; the lug boss and the mounting part are connected into a whole; the lower surface of the upper die is provided with a groove part matched with the mounting part; the mounting portion is inserted into the groove portion and fixed by a bolt. According to the structure, the installation part is inserted into the groove part and is fixed through the bolt, only the protruding part is exposed, and the molding sand modeling effect of the original integrally formed protrusion or male die is born.

Furthermore, four threaded blind holes are formed in the surface, matched with the groove part, of the mounting part; four through holes penetrating through the upper die are formed in the groove part; the four through holes correspond to the four threaded blind holes and are used for inserting bolts to fasten the hanging block and the upper die. According to the structure, the four bolts enable the hanging block and the upper die to be fastened more firmly, the threaded blind holes enable the bolts not to penetrate through the convex parts, and the completeness of the shape of the convex parts is guaranteed.

Further, the sand shooting hole is communicated with the cavity by avoiding the bulge. According to the structure, the gaps between the convex parts can be filled more easily, and the sand shooting holes are prevented from penetrating through the convex parts to influence the modeling.

Furthermore, the cross section of the mounting part is non-circular, so that rotation caused when the hanging block is fastened is avoided. According to the structure, the section of the mounting part is non-circular, and the groove part is also non-circular; the circular section is easy to rotate when fixed, and once the mounting part rotates, the lug boss rotates; the projections are generally irregularly shaped and slight deflections affect the shape of the sand pattern.

Further, heating holes are formed in the side faces of the upper die and the lower die; the heating hole is used for inserting a heating rod to heat the molding sand. According to the structure, the heating rod heats the molding sand and provides the temperature required by the process.

The utility model has the advantages that:

1. the utility model discloses a detachable sand casting mould for an engine cylinder, which comprises an upper mould and a lower mould; the upper die and the lower die are combined, and a cavity is formed inside the upper die and the lower die; the upper die is provided with a plurality of sand shooting holes, and the sand shooting holes are used for injecting molding sand into the cavity; the lower surface of the upper die is fixedly provided with a plurality of hanging blocks, and the hanging blocks are used for molding sand; the hanging block is detachably connected with the upper die. The utility model discloses a detachable engine cylinder body sand type casting mould solves traditional mould and adds man-hour, and the terrace die interval is too little, and milling cutter advances not to go, and the mould can not all assemble into holistic defect, avoids the not enough problem of rigidity that the partial assembly mode brought.

Drawings

FIG. 1 is a schematic structural view of the upper mold and the lower mold after the mold closing;

FIG. 2 is a schematic top view of the upper mold of the present invention;

FIG. 3 is a left side view schematic diagram of the upper mold of the present invention;

FIG. 4 is a schematic view of the three-dimensional structure of the bottom of the upper mold of the present invention;

FIG. 5 is a schematic structural view of the utility model with the upper mold removed, the hanging block and the lower mold;

in the drawings: 1-upper die, 2-lower die, 11-sand shooting hole, 12-groove part, 13-through hole, 14-heating hole, 3-hanging block, 31-bulge, 32-mounting part and 33-threaded blind hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.

The first embodiment is as follows:

see figures 1-5. A detachable sand casting mould for an engine cylinder block comprises an upper mould 1 and a lower mould 2; the upper die 1 and the lower die 2 are combined, and a cavity is formed inside the upper die and the lower die; the upper die 1 is provided with a plurality of sand shooting holes 11, and the sand shooting holes 11 are used for injecting molding sand into the cavity; a plurality of hanging blocks 3 are fixed on the lower surface of the upper die 1, and the hanging blocks 3 are used for molding sand; the hanging block 3 is detachably connected with the upper die 1. According to the structure, the molding sand is injected into the cavity formed by the upper die 1 and the lower die 2 after being combined through the sand injecting holes 11, and the molding sand forms a shape which is attached to the hanging block 3; the molding sand is filled in the gaps among the hanging blocks 3; because the existing bulge or convex die and the upper die 1 are integrally formed, when the bulge or convex die requires a smaller distance in processing, a milling cutter cannot extend into the machining tool, the bulge or convex die is used as a detachable hanging block 3, and the hanging block 3 is separately processed and then fixed on the lower surface of the upper die 1, so that the problem that the distance is small and the machining tool cannot be processed can be solved, and the integral rigidity of the die cannot be influenced; in addition, when the gaps among the hanging blocks 3 are small, a large amount of molding sand is saved in batch production, and the cost is saved.

Example two:

The hanging block 3 comprises a convex part 31 and a mounting part 32; the boss 31 and the mounting portion 32 are connected into a whole; the lower surface of the upper die 1 is provided with a groove part 12 matched with the mounting part 32; the mounting portion 32 is inserted into the groove portion 12 and fixed by a bolt. With the above structure, the mounting portion 32 is inserted into the recessed portion 12 and fixed by the bolt, and only the protruding portion 31 is exposed to play a role of molding sand of the original integrally molded protrusion or punch.

Example three:

Four threaded blind holes 33 are arranged on the surface of the mounting part 32 matched with the groove part 12; four through holes 13 penetrating through the upper die 1 are formed in the groove part 12; the four through holes 13 correspond to the four blind threaded holes 33, and are used for inserting bolts to fasten the hanging block 3 and the upper die 1. According to the structure, the hanging block 3 and the upper die 1 are firmly fastened by the four bolts, the bolts cannot penetrate through the convex part 31 due to the threaded blind holes 33, and the integrity of the shape of the convex part 31 is guaranteed.

The sand shooting hole 11 opens into the cavity avoiding the boss 31. With the above configuration, the gap between the protrusions 31 can be filled more easily, and the sand shooting hole 11 can be prevented from penetrating the protrusions 31 to affect the molding.

The mounting portion 32 is non-circular in cross-section to avoid rotation when the hanger block 3 is tightened. As can be seen from the above structure, the cross section of the mounting portion 32 is non-circular, and the recessed groove portion 12 is also non-circular; the circular cross-section is fixed and easy to rotate, causing the boss 31 to rotate once the mounting portion 32 rotates; the projections 31 are generally irregular in shape and slight deflections affect the shape of the sand pattern.

Heating holes 14 are formed in the side faces of the upper die 1 and the lower die 2; the heating holes 14 are used for inserting heating rods to heat the molding sand. According to the structure, the heating rod heats the molding sand and provides the temperature required by the process.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.

Claims

1. The utility model provides a detachable engine cylinder block sand casting mould which characterized in that: comprises an upper die (1) and a lower die (2); the upper die (1) and the lower die (2) are combined, and a cavity is formed inside the upper die and the lower die; the upper die (1) is provided with a plurality of sand shooting holes (11), and the sand shooting holes (11) are used for injecting molding sand into the cavity; the lower surface of the upper die (1) is fixedly provided with a plurality of hanging blocks (3), and the hanging blocks (3) are used for molding sand; the hanging block (3) is detachably connected with the upper die (1).

2. A demountable engine block sand casting mold according to claim 1, wherein: the hanging block (3) comprises a convex part (31) and a mounting part (32); the lug boss (31) and the mounting part (32) are connected into a whole; the lower surface of the upper die (1) is provided with a groove part (12) matched with the mounting part (32); the mounting portion (32) is inserted into the groove portion (12) and fixed by a bolt.

3. A demountable engine block sand casting mold according to claim 2, wherein: four threaded blind holes (33) are formed in the surface, matched with the groove part (12), of the mounting part (32); four through holes (13) penetrating through the upper die (1) are formed in the groove part (12); the four through holes (13) correspond to the four threaded blind holes (33) and are used for inserting bolts to fasten the hanging block (3) and the upper die (1).

4. A demountable engine block sand casting mold according to claim 2, wherein: the sand shooting hole (11) avoids the bulge (31) and is communicated with the cavity.

5. A demountable engine block sand casting mold according to claim 2, wherein: the section of the mounting part (32) is non-circular, so that rotation caused when the hanging block (3) is fastened is avoided.

6. A demountable engine block sand casting mold according to any one of claims 1 to 5, wherein: heating holes (14) are formed in the side faces of the upper die (1) and the lower die (2); the heating holes (14) are used for inserting heating rods to heat the molding sand.