CN-224222710-U - Integrated semi-solid magnesium alloy high-pressure casting die for new energy automobile

Abstract

The utility model belongs to the technical field of casting molds of automobile parts, and provides an integrated semi-solid magnesium alloy high-pressure casting mold for a new energy automobile, which comprises a movable mold assembly, a fixed mold assembly, a sliding block mechanism, a sealing assembly, an exhaust assembly and a pouring system, wherein the movable mold assembly is connected with the fixed mold assembly; the sealing assembly is arranged between the movable die assembly and the fixed die assembly, a sealing cavity is formed between the movable die assembly and the fixed die assembly, a product cavity is further formed between the movable die assembly and the fixed die assembly, the product cavity comprises three cavities for forming a first main body part, a second main body part and a third main body part respectively, the sliding block mechanism is arranged on the movable die assembly, the exhaust assembly comprises an exhaust piece, and the pouring system comprises a pouring gate. Compared with the prior art, the pouring gate is asymmetrically distributed along the product cavity, so that the semisolid magnesium alloy slurry can be guided to be filled in a stable laminar state, the gas rolling, turbulence and impact are reduced, the defect of cold insulation and shrinkage porosity of the product is reduced, and the molding precision and mechanical property of the integrated vehicle-mounted decorative plate are improved.

Inventors

• LI JINBU
• FENG PING

Assignees

• 宁波赛维达技术股份有限公司

Dates

Publication Date

20260512

Application Date

20260407

Claims (10)

1. 1. The integrated semi-solid magnesium alloy high-pressure casting die for the new energy automobile is used for forming a vehicle-mounted decorative plate, and the vehicle-mounted decorative plate comprises a first main body part, a second main body part and a third main body part which are sequentially arranged, and is characterized by comprising a movable die assembly, a fixed die assembly, a sliding block mechanism, a sealing assembly, an exhaust assembly and a pouring system; The sealing assembly is arranged between the movable die assembly and the fixed die assembly, a sealing cavity is formed between the movable die assembly and the fixed die assembly, a product cavity positioned in the sealing cavity is also formed between the movable die assembly and the fixed die assembly, and the product cavity comprises three cavities which are communicated in sequence and are respectively used for forming the first main body part, the second main body part and the third main body part; the sliding block mechanism is arranged on the movable die assembly and is positioned at one side of the cavity corresponding to the first main body part; the exhaust assembly comprises exhaust pieces corresponding to the three chambers and the sliding block mechanism; the pouring system comprises pouring gates corresponding to the three chambers, wherein, The pouring system comprises a sealing cavity, a pouring system, a sealing cavity, a semi-solid magnesium alloy slurry filling device, at least one pouring gate, at least one gas discharging part, a sealing cavity and at least one gas discharging part, wherein the gas discharging parts are positioned in the sealing cavity, the chambers are respectively provided with at least one pouring gate and at least one gas discharging part, the pouring gates of the pouring system are asymmetrically distributed along the product cavity and are used for guiding the semi-solid magnesium alloy slurry to be filled in a laminar flow mode, and the gas discharging parts corresponding to the chambers at least correspond to the last arrival position of feeding of the chambers.
2. 2. The integrated semi-solid magnesium alloy high-pressure casting mold for the new energy automobile of claim 1, wherein the casting system comprises two first gates arranged corresponding to the cavity corresponding to the second main body part, one second gate arranged corresponding to the cavity corresponding to the first main body part and one third gate arranged corresponding to the cavity corresponding to the third main body part, and the two first gates are respectively close to one side of the cavity corresponding to the first main body part and one side of the cavity corresponding to the third main body part to form an asymmetric feeding layout.
3. 3. The integrated semi-solid magnesium alloy high-pressure casting mold for a new energy automobile according to claim 2, wherein the cross-sectional areas of the two first gates are different, and the cross-sectional area of the first gate near the corresponding chamber of the first main body is 1.2-1.5 times of the cross-sectional area of the first gate near the corresponding chamber of the third main body.
4. 4. The integrated semi-solid magnesium alloy high-pressure casting mold for the new energy automobile according to claim 1, wherein the central connecting line of each gate does not pass through the geometric center of the product cavity, and the difference of the corresponding gate intervals of two adjacent cavities is 10% -20% of the transverse total length of the vehicle-mounted decorative plate.
5. 5. The integrated semi-solid magnesium alloy high-pressure casting die for the new energy automobile according to claim 1, wherein the exhaust piece is exhaust areas which are respectively arranged on the movable die assembly and the fixed die assembly and correspond to each other, a plurality of protruding blocks are distributed on each exhaust area at intervals, and the protruding blocks on the movable die assembly and the protruding blocks on the fixed die assembly are arranged in a crossing mode so as to form a blocking type exhaust structure.
6. 6. The integrated semi-solid magnesium alloy high-pressure casting mold for a new energy automobile according to claim 1, wherein the exhaust assembly further comprises a vacuum valve arranged outside the fixed mold assembly or the movable mold assembly, and the vacuum valve is communicated with the exhaust piece through an exhaust passage.
7. 7. The integrated semi-solid magnesium alloy high-pressure casting die for a new energy automobile of claim 1, wherein the sealing assembly comprises an annular sealing groove arranged on a parting surface of the movable die assembly or the fixed die assembly, the annular sealing groove penetrates through a coverage area of the sliding block mechanism, a sealing ring is arranged in the annular sealing groove, and when the movable die assembly and the fixed die assembly are abutted, the sealing ring is compressed and fills the annular sealing groove.
8. 8. The integrated semi-solid magnesium alloy high-pressure casting mold for new energy automobiles according to claim 1, wherein the position of the exhaust piece is set according to the last arrival position of the feeding corresponding to the cavity, and the distance between the center of the exhaust piece and the center of the nearest gate is 30% -50% of the longitudinal length of the cavity.
9. 9. The integrated semi-solid magnesium alloy high-pressure casting die for the new energy automobile as claimed in claim 7, wherein the sealing ring is made of high-temperature resistant fluororubber, the cross section of the sealing ring is rectangular, the side length of the sealing ring is 0.2-0.5mm greater than the depth of the annular sealing groove, and the sealing ring ensures effective sealing when the movable die assembly is abutted against the fixed die assembly.
10. 10. The integrated semisolid magnesium alloy high-pressure casting mold for the new energy automobile according to claim 1, wherein the sliding block mechanism comprises a sliding block body and an oil cylinder, wherein a profiling boss is arranged on one side, which is attached to a cavity corresponding to the first main body, of the sliding block body, and the oil cylinder is connected with the sliding block body and used for driving the sliding block body to slide along the movable mold assembly.

Description

Integrated semi-solid magnesium alloy high-pressure casting die for new energy automobile Technical Field The utility model belongs to the technical field of casting molds of automobile parts, and particularly relates to an integrated semi-solid magnesium alloy high-pressure casting mold for a new energy automobile. Background Most of the vehicle-mounted decorative plates of the new energy automobiles are of an integrated strip-shaped structure, and generally comprise a plurality of sections of main body parts which are sequentially arranged, so that the whole energy automobile has large size span and high structural continuity requirement, and at present, the problems of large weight, insufficient strength, low forming precision and the like exist due to the fact that aluminum alloy die casting or common injection molding is adopted. The semi-solid magnesium alloy has the advantages of low density, high specific strength, good molding fluidity and the like, meets the light weight requirement of a new energy automobile, but has obvious defects when being used for the die casting of integrated long-strip vehicle-mounted decorative plates, namely, the conventional high-pressure casting die has the defects that the casting system is mainly symmetrically distributed, the flow rate of semi-solid slurry is uneven, the defects of gas coiling, cold insulation, shrinkage porosity and the like are easy to occur, the product density and the mechanical property are difficult to meet the assembly requirement of the vehicle-mounted decorative plates, the exhaust of the corresponding areas of the cavity sections are not matched, the gas at the tail ends of the slurry filling cannot be discharged in time to form pores and surface flaws, the sealing effect of the parting surface is poor, the internal quality of the product is difficult to be stably established by vacuum auxiliary molding, and the joint position of the main body parts of the multi-section is easy to have filling lag and size deviation, and the flash and strain are easy to occur in the molding area of the sliding block. In addition, the prior mold has unreasonable gate section and interval design, slurry is difficult to maintain in a laminar flow filling state, internal defects of products are aggravated, an exhaust structure is mostly in a straight-through type, molten metal splashing cannot be effectively prevented, an exhaust channel is blocked, the rejection rate of the products is increased, the high temperature resistance and the compression amount of a sealing element are insufficient, the sealing element is invalid after long-term use, and the vacuum degree is reduced. In summary, the existing mold structure is difficult to adapt to the high-pressure casting requirement of the integrated semi-solid magnesium alloy vehicle-mounted decorative plate, and still has a large improvement space. Therefore, it is necessary to provide an integrated semi-solid magnesium alloy high-pressure casting mold for new energy automobiles to solve the above technical problems. Disclosure of utility model The utility model aims to provide an integrated semisolid magnesium alloy high-pressure casting die for a new energy automobile, which aims to solve the problems that in the die casting process of an integrated semisolid magnesium alloy vehicle-mounted decorative plate of the existing die, slurry filling is uneven, air exhaust is not smooth, sealing effect is poor, vacuum degree is unstable, and defects such as air holes, cold insulation, shrinkage porosity and dimensional deviation are caused in a product, so that the requirements of light weight and high precision assembly of the new energy automobile cannot be met. The technical scheme includes that the integrated semi-solid magnesium alloy high-pressure casting die for the new energy automobile comprises a first main body part, a second main body part and a third main body part which are sequentially arranged, wherein the die comprises a movable die assembly, a fixed die assembly, a sliding block mechanism, a sealing assembly, an exhaust assembly and a pouring system; The sealing assembly is arranged between the movable die assembly and the fixed die assembly, a sealing cavity is formed between the movable die assembly and the fixed die assembly, a product cavity positioned in the sealing cavity is also formed between the movable die assembly and the fixed die assembly, and the product cavity comprises three cavities which are communicated in sequence and are respectively used for forming the first main body part, the second main body part and the third main body part; the sliding block mechanism is arranged on the movable die assembly and is positioned at one side of the cavity corresponding to the first main body part; the exhaust assembly comprises exhaust pieces corresponding to the three chambers and the sliding block mechanism; the pouring system comprises pouring gates corresponding to the three chambers, where