CN118385516A - Die casting device and die casting method for automobile part die casting - Google Patents
Die casting device and die casting method for automobile part die casting Download PDFInfo
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- CN118385516A CN118385516A CN202410472912.2A CN202410472912A CN118385516A CN 118385516 A CN118385516 A CN 118385516A CN 202410472912 A CN202410472912 A CN 202410472912A CN 118385516 A CN118385516 A CN 118385516A
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- die casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/0804—Cleaning containers having tubular shape, e.g. casks, barrels, drums
- B08B9/0808—Cleaning containers having tubular shape, e.g. casks, barrels, drums by methods involving the use of tools, e.g. by brushes, scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2236—Equipment for loosening or ejecting castings from dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/30—Accessories for supplying molten metal, e.g. in rations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The application discloses a die casting device and a die casting method of an automobile part die casting, and relates to the technical field of die casting. The application is provided with the auxiliary demoulding mechanism, so that the movable rod piece intermittently knocks the lower die holder in the reciprocating movement process, the inner wall of the lower die holder and the outer wall of the die casting are knocked loose, the demoulding difficulty is reduced, the ejector mechanism is arranged, the upward movement of the supporting rod is realized under the action of the driving component, the ejector rod jacks up the formed die casting when moving upward, the automatic demoulding of the die casting is realized, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of die casting, in particular to a die casting device and a die casting method of an automobile part die casting.
Background
With the rapid development of the global automobile industry, the continuous innovation and progress of automobile part manufacturing technology has put forward higher requirements on the aspects of improving production efficiency, reducing production cost, ensuring product quality, enhancing product competitiveness and the like. As an important metal forming method, the die casting technology is increasingly used in the field of automobile part manufacturing. In the production process of die castings, demolding is a key link, if the demolding process is improperly processed, defects such as air holes, shrinkage porosity and the like can be caused on the surface of the castings, so that the overall quality and the service performance of the castings are affected, and meanwhile, if the demolding operation is improperly performed, unnecessary abrasion and corrosion of the molds can be caused, so that the service life of the molds is shortened.
Traditional demolding modes often rely on manual or simple mechanical devices, which results in low efficiency of the demolding process and easy damage to die castings, and due to tight combination between the die castings and the molds and shrinkage characteristics after metal cooling, the demolding process often faces great difficulty, and improper demolding operation can also lead to damage to the surfaces of the castings, affecting the quality and performance of the castings. Therefore, how to realize automatic demolding of the die casting, reduce dependence of manual operation, reduce demolding difficulty and avoid damage of the casting in the demolding process is an important problem facing the die casting industry. The present device was invented by studying the above problems.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a die casting device and a die casting method for an automobile part die casting, which solve the problems in the prior art.
In order to achieve the above object, the present invention provides the following technical solutions: the utility model provides a die casting device of auto parts die casting, including upper die base and die holder, the upper die base bottom is provided with the movable core, the die holder top is provided with fixed core, upper die base top both sides all are provided with annotate material mechanism, the inside both sides of upper die base have all been seted up the snakelike runner, and the snakelike runner top passes the upper die base top surface, snakelike runner end passes the upper die base bottom surface, a plurality of shoulder holes have been seted up on the fixed core, be provided with the ejector rod in the shoulder hole, be provided with ejection mechanism on the die holder, the outside both sides of die holder all are provided with auxiliary demoulding mechanism.
Optionally, hydraulic cylinders are fixedly arranged at four corners of the lower die holder, and the tail ends of piston rods of the hydraulic cylinders at the four corners are fixedly connected with four corners of the bottom of the upper die holder respectively.
Optionally, annotate material mechanism and include the former storage bucket of fixed mounting at upper die base top, former storage bucket top is provided with the bung, and the intercommunication has the charging pipeline on the bung, and former storage bucket bottom intercommunication has the row material pipeline, and arranges the material pipeline and be connected with the top of the snakelike runner that the homonymy set up, and bung top intermediate position fixed mounting has a motor, and a motor output shaft has the rotary rod through the coupling joint, fixedly mounted has mixing vane on the rotary rod.
Optionally, the rotary rod is further provided with a wall scraping assembly, the wall scraping assembly comprises two connecting sleeves fixedly installed on the rotary rod, the two connecting sleeves are arranged in parallel, a spring is fixedly installed in each connecting sleeve, a connecting rod is connected in the connecting sleeve in a sliding mode, the connecting rod is connected with the spring, and scraping plates are fixedly installed at the outer ends of the two connecting rods.
Optionally, ejection mechanism is including rotating the bi-directional screw rod of installing on the die holder, and bi-directional screw rod is horizontal setting, fixed mounting has the guide bar on the die holder, and the equal threaded connection in bi-directional screw rod both sides has the removal seat, and the guide bar runs through both sides and removes the seat, and the inside removal backing plate that is provided with of die holder, many ejector rods all with remove backing plate fixed connection, remove the equal fixed mounting in backing plate bottom both sides and have the fixing base, locate movable mounting vaulting pole between the removal seat and the fixing base of homonymy.
Optionally, the ejection mechanism further comprises a driving component for driving the bidirectional screw rod to rotate, the driving component comprises a second motor arranged outside the lower die holder, an output shaft of the second motor is connected with a pinion, one end of the bidirectional screw rod is fixedly provided with a large gear, and the large gear is meshed with the pinion.
Optionally, the auxiliary demoulding mechanism comprises a mounting base plate fixedly mounted on the lower die holder, a motor No. three is fixedly mounted at the bottom of the mounting base plate, an output shaft of the motor No. three is connected with an eccentric rod through a coupling, a movable rod piece is arranged outside the eccentric rod, upright rods are fixedly mounted at four corners of the top of the mounting base plate, and idler wheels are rotatably mounted on the upright rods.
Optionally, a reinforcing frame is fixedly arranged between the lower die holder and the mounting base plate.
Optionally, a fan frame is fixedly installed at the rear of the lower die holder, and a plurality of cooling fans are arranged on the fan frame.
A die casting method of an automobile part die casting adopts a die casting device of the automobile part die casting, and comprises the following steps:
s1: opening a hydraulic cylinder between the upper die holder and the lower die holder to enable the bottom of the upper die holder to be attached to the top of the lower die holder, and generating a cavity between the movable core and the fixed core;
S2: pouring a metal solution into the raw material barrel through a feeding pipeline;
s3: starting a first motor, and stirring the metal solution in the raw material barrel by utilizing the rotation of the mixing blade to realize the full mixing of the raw materials;
s4: the stirred metal solution flows into a cavity along a serpentine runner for molding;
S5: starting a third motor to realize the reciprocating movement of the movable rod, intermittently knocking the lower die holder during the reciprocating movement of the movable rod, and knocking the inner wall of the lower die holder and the outer wall of the die casting loose;
s6: starting a second motor, realizing the opposite movement of the moving seats at two sides under the action of the driving assembly, realizing the upward movement of the stay bar, and jacking up the formed die casting;
s7: and starting the cooling fan to perform rapid cooling operation on the die casting.
Compared with the prior art, the invention has the beneficial effects that:
1. The auxiliary demoulding mechanism is arranged, so that the reciprocating movement of the movable rod piece is realized, the movable rod piece intermittently knocks the lower die holder in the reciprocating movement process, the inner wall of the lower die holder is knocked loose from the outer wall of the die casting, smooth separation of the die casting in the subsequent demoulding process is facilitated, the demoulding difficulty is reduced, the ejector mechanism is arranged, the opposite movement of the movable seats at the two sides is realized under the action of the driving assembly, the upward movement of the supporting rod is realized, and the formed die casting is ejected by the ejector rod in the upward movement process, so that the automatic demoulding of the die casting is realized, and the production efficiency is improved;
2. The invention is provided with the material injection mechanism, and the metal solution is stirred before flowing into the cavity, so that the mixture of the melt is promoted, more stable alloy components are obtained, the performance of the casting is improved, air bubbles in the melt are discharged, the formation of air holes is reduced, the dissolution reaction of alloy elements in the melt can be accelerated, the alloy elements are more uniformly distributed in the melt, the quality of the casting is further improved, and meanwhile, the addition of the scraping component effectively prevents the adhesion of raw materials on the inner wall of the raw material barrel, the utilization rate of the raw materials is improved, and the waste is reduced.
Drawings
For a clearer description of embodiments of the present application or technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a schematic view of the overall structure provided by the present invention;
FIG. 2 is a rear elevational view of the overall structure provided by the present invention;
FIG. 3 is a schematic view of the internal structure of the lower die holder according to the present invention;
FIG. 4 is an enlarged schematic view of area A of FIG. 3 in accordance with the present invention;
FIG. 5 is an enlarged schematic view of area B of FIG. 3 according to the present invention;
FIG. 6 is a schematic structural diagram of a material injecting mechanism according to the present invention;
FIG. 7 is a schematic view of an auxiliary demolding mechanism provided by the invention;
FIG. 8 is a schematic diagram of a lower die holder according to the present invention;
FIG. 9 is a schematic structural view of an upper die holder provided by the present invention;
fig. 10 is a cross-sectional view of an upper die holder provided by the invention.
Reference numerals illustrate:
1. An upper die holder; 2. a lower die holder; 3. a moving core; 4. fixing the core; 5. a material injection mechanism; 501. a raw material barrel; 502. a barrel cover; 503. a motor I; 504. a rotating rod; 505. mixing blades; 506. a feed pipe; 507. a discharge pipe; 508. a wall scraping assembly; 5081. a connecting sleeve; 5082. a spring; 5083. a connecting rod; 5084. a scraper; 6. serpentine flow channels; 7. a stepped hole; 8. an ejector rod; 9. an ejection mechanism; 901. a bidirectional screw; 902. a guide rod; 903. a movable seat; 904. moving the backing plate; 905. a fixing seat; 906. a brace rod; 907. a drive assembly; 9071. a motor II; 9072. a pinion gear; 9073. a large gear; 10. an auxiliary demoulding mechanism; 1001. installing a backing plate; 1002. a third motor; 1003. an eccentric rod; 1004. a vertical rod; 1005. a roller; 1006. moving the rod member; 11. a hydraulic cylinder; 12. a fan frame; 13. a heat radiation fan; 14. and a reinforcing frame.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The present application will be further described in detail below with reference to the drawings and detailed description for the purpose of enabling those skilled in the art to better understand the aspects of the present application.
Example 1:
Referring to fig. 1, 2 and 8-10, a die casting device for a die casting of an automobile part according to this embodiment includes an upper die holder 1 and a lower die holder 2, wherein a movable core 3 is provided at the bottom of the upper die holder 1, a fixed core 4 is provided at the top of the lower die holder 2, and when the bottom of the upper die holder 1 is attached to the top of the lower die holder 2, a cavity is formed between the movable core 3 and the fixed core 4, so as to provide a molding space for the die casting, and the die casting is molded. The snakelike runner 6 has all been seted up to the inside both sides of upper die base 1, and snakelike runner 6 top passes upper die base 1 top surface, and snakelike runner 6 end passes upper die base 1 bottom surface, through seting up snakelike runner 6, helps cooling fast after the metal solution shaping, guarantees foundry goods quality. The four corners of the lower die holder 2 are fixedly provided with hydraulic cylinders 11, and the tail ends of piston rods of the hydraulic cylinders 11 at the four corners are fixedly connected with the four corners of the bottom of the upper die holder 1 respectively.
Referring to fig. 1 and 6, the injection mechanism 5 is provided on both sides above the upper die holder 1, the injection mechanism 5 includes the raw materials bucket 501 of fixed mounting at the upper die holder 1 top, the raw materials bucket 501 is used for storing the metal solution, the raw materials bucket 501 top is provided with bung 502, the intercommunication has charging pipeline 506 on bung 502, through charging pipeline 506, the staff adds the metal solution to the raw materials bucket 501 in, raw materials bucket 501 bottom intercommunication has row material pipeline 507, and row material pipeline 507 is connected with the top of serpentine runner 6 that the homonymy set up, be provided with the valve on the row material pipeline 507, bung 502 top intermediate position fixed mounting has motor 503, motor 503 output shaft is connected with rotary rod 504 through the shaft coupling, fixed mounting has mixed blade 505 on the rotary rod 504, the staff opens motor 503 when using, motor 503 drives rotary rod 504 and mixed blade 505 and rotates, the metal solution in the raw materials bucket 501 stirs, realize the intensive mixing of raw materials.
The metal solution is stirred before the die casting operation, so that the mixing of the melt is promoted, more stable alloy components are obtained, the performance of the casting is improved, air bubbles in the melt are discharged, the formation of air holes is reduced, the dissolution reaction of alloy elements in the melt can be accelerated, the alloy elements are more uniformly distributed in the melt, and the quality of the casting is further improved.
Referring to fig. 6, the rotating rod 504 is further provided with a wall scraping assembly 508, and the wall scraping assembly 508 rotates synchronously with the rotating rod 504, so that the adhesion of raw materials on the inner wall of the raw material barrel 501 is effectively prevented by the wall scraping assembly 508, the utilization rate of the raw materials is improved, and the waste is reduced. The scraping wall assembly 508 comprises two connecting sleeves 5081 fixedly mounted on the rotating rod 504, the two connecting sleeves 5081 are arranged side by side, a spring 5082 is fixedly mounted in the connecting sleeve 5081, a connecting rod 5083 is slidably connected in the connecting sleeve 5081, the connecting rod 5083 is connected with the spring 5082, scraping plates 5084 are fixedly mounted at the outer ends of the two connecting rods 5083, the shape of the scraping plates 5084 can be self-adaptive to the shape of the raw material barrel 501 through the design of the spring 5082 and the connecting rod 5083, the scraping wall effect is improved, and meanwhile the scraping wall assembly 508 can be applied to the raw material barrels 501 with various specifications and is wider in application range.
Referring to fig. 3-5 and 8, a plurality of stepped holes 7 are formed in the fixed core 4, the stepped holes 7 are of a structure with wide upper part and narrow lower part, ejector rods 8 are arranged in the stepped holes 7, the top diameter of each ejector rod 8 is larger than the bottom diameter of each ejector rod 8, so that the ejector rods 8 are limited, an ejector mechanism 9 is arranged on the lower die holder 2, and the ejector mechanism 9 is matched with the movable base 903, the supporting rods 906 and the movable base 904 through bidirectional screws 901, so that synchronous movement of the plurality of ejector rods 8 is realized, and a die casting piece is effectively ejected from the die.
Referring to fig. 4, the ejector mechanism 9 includes a bidirectional screw 901 rotatably mounted on the lower die holder 2, and the bidirectional screw 901 is transversely disposed, guide rods 902 are fixedly mounted on the lower die holder 2, specifically, two guide rods 902 are provided, and the two guide rods 902 are separately disposed on two sides of the bidirectional screw 901, two sides of the bidirectional screw 901 are respectively in threaded connection with a movable seat 903, and the guide rods 902 penetrate through the movable seats 903 on two sides, so that limiting of the movable seats 903 on two sides is achieved, the movable seats 903 on two sides can move in opposite directions or move in opposite directions in the process of rotating the bidirectional screw 901, a movable base 904 is disposed in the lower die holder 2, a plurality of ejector rods 8 are fixedly connected with the movable base 904, fixing seats 905 are fixedly mounted on two sides of the bottom of the movable base 904, supporting rods 906 are movably mounted between the movable seats 903 and the fixing seats 905 on the same side, when the movable seats 903 on two sides move in opposite directions, under the connection effect of the supporting rods 906 on two sides, the ejector rods 8 move downward under the connection effect of the supporting rods 906 on two sides.
Referring to fig. 5, the ejection mechanism 9 further includes a driving component 907 for driving the bidirectional screw 901 to rotate, and the driving component 907 is configured to automate the ejection process, thereby improving production efficiency. The driving component 907 comprises a second motor 9071 arranged outside the lower die holder 2, a pinion 9072 is connected to an output shaft of the second motor 9071, a large gear 9073 is fixedly arranged at one end of the bidirectional screw 901, the large gear 9073 is meshed with the pinion 9072, an operator starts the second motor 9071 when in use, the second motor 9071 drives the small gear 9072 to rotate, and the small gear 9072 is meshed with the large gear 9073, so that the large gear 9073 synchronously rotates, the rotation of the bidirectional screw 901 is realized, the small gear 9072 is used as a driving piece to drive the large gear 9073 to rotate, and the rotation speed of the bidirectional screw 901 is reduced.
Referring to fig. 1 and 7, the auxiliary demoulding mechanism 10 is arranged on two external sides of the lower die holder 2, the auxiliary demoulding mechanism 10 comprises a mounting base plate 1001 fixedly mounted on the lower die holder 2, a third motor 1002 is fixedly mounted at the bottom of the mounting base plate 1001, an output shaft of the third motor 1002 is connected with an eccentric rod 1003 through a coupling, an operator starts the third motor 1002 when in use, the third motor 1002 drives the eccentric rod 1003 to rotate, a movable rod 1006 is arranged outside the eccentric rod 1003, the movable rod 1006 is of a cross-shaped structure, a through groove is formed in the middle position of the movable rod 1006, the top of the eccentric rod 1003 is arranged in the through groove, upright rods 1004 are fixedly mounted at four corners of the top of the mounting base plate 1001, rollers 1005 are rotatably mounted on the upright rods 1004, two sides of the movable rod 1006 are respectively arranged between the two rollers 1005 on the same side, friction of the movable rod 1006 in the moving process is reduced, the service life is prolonged, and one end, close to the lower die holder 2, of the movable rod 1006 is made of rubber materials.
After the die casting is formed, an operator starts a motor No. three 1002, the motor No. three 1002 drives an eccentric rod 1003 to rotate, and under the action of the eccentric rod 1003 and idler wheels 1005 at four corners, the movable rod 1006 moves reciprocally and transversely, namely, the reciprocally knocks the lower die holder 2, so that the inner wall of the lower die holder 2 and the outer wall of the die casting are knocked loose, and the realization of a subsequent ejection process is facilitated.
Referring to fig. 2, a reinforcing frame 14 is fixedly installed between the lower die holder 2 and the mounting pad 1001, and the reinforcing frame 14 enhances the connection strength between the lower die holder 2 and the mounting pad 1001, thereby improving the stability of the whole die casting apparatus.
Referring to fig. 1 and 2, a fan frame 12 is fixedly installed at the rear of the lower die holder 2, a plurality of cooling fans 13 are arranged on the fan frame 12, when the die casting is ejected, an operator starts the cooling fans 13, and the fans generate air flow to cool the formed die casting, so that the cooling efficiency of the die casting is improved.
Example 2:
A die casting method of an automobile part die casting adopts a die casting device of the automobile part die casting, and comprises the following steps:
s1: the hydraulic cylinder 11 between the upper die holder 1 and the lower die holder 2 is opened, so that the bottom of the upper die holder 1 is attached to the top of the lower die holder 2, a cavity is formed between the movable die core 3 and the fixed die core 4, and a foundation is provided for the subsequent die casting process;
S2: pouring a metal solution into the raw material barrel 501 through a charging pipe 506;
S3: the first motor 503 is started, and the metal solution in the raw material barrel 501 is stirred by utilizing the rotation of the mixing blade 505, so that the raw materials are fully mixed, and the quality problem of castings caused by uneven components is avoided;
S4: the stirred metal solution flows into the cavity along the serpentine flow channel 6 for molding, and the design of the serpentine flow channel 6 is beneficial to uniform distribution and rapid cooling of the metal solution, so that the quality of castings is further improved;
S5: starting a third motor 1002 to realize the reciprocating movement of a movable rod 1006, intermittently knocking the lower die holder 2 in the reciprocating movement process of the movable rod 1006, and knocking the inner wall of the lower die holder 2 and the outer wall of the die casting loose, so that the step is beneficial to the smooth separation of the die casting in the subsequent demolding process, and the demolding difficulty is reduced;
S6: the second motor 9071 is started, opposite movement of the two side moving seats 903 is realized under the action of the driving component 907, upward movement of the supporting rod 906 is realized, the formed die casting is jacked up, automatic demolding of the die casting is realized, and production efficiency is improved;
s7: the cooling fan 13 is turned on to perform a rapid cooling operation on the die casting.
Finally: the foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410472912.2A CN118385516A (en) | 2024-04-19 | 2024-04-19 | Die casting device and die casting method for automobile part die casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410472912.2A CN118385516A (en) | 2024-04-19 | 2024-04-19 | Die casting device and die casting method for automobile part die casting |
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| CN118385516A true CN118385516A (en) | 2024-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410472912.2A Pending CN118385516A (en) | 2024-04-19 | 2024-04-19 | Die casting device and die casting method for automobile part die casting |
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| CN118543820A (en) * | 2024-07-30 | 2024-08-27 | 江苏绿阳温室设备有限公司 | Connecting piece casting equipment for warmhouse booth |
| CN118905163A (en) * | 2024-10-10 | 2024-11-08 | 泰州市大明不锈钢有限公司 | Stainless steel part casting forming machine |
| CN120170046A (en) * | 2025-04-01 | 2025-06-20 | 苏州嘉都机械科技有限公司 | Die casting mold for automobile steering motor end cover processing |
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|---|---|---|---|---|
| CN118543820A (en) * | 2024-07-30 | 2024-08-27 | 江苏绿阳温室设备有限公司 | Connecting piece casting equipment for warmhouse booth |
| CN118543820B (en) * | 2024-07-30 | 2024-10-11 | 江苏绿阳温室设备有限公司 | Connecting piece casting equipment for warmhouse booth |
| CN118905163A (en) * | 2024-10-10 | 2024-11-08 | 泰州市大明不锈钢有限公司 | Stainless steel part casting forming machine |
| CN118905163B (en) * | 2024-10-10 | 2024-12-13 | 泰州市大明不锈钢有限公司 | Stainless steel part casting forming machine |
| CN120170046A (en) * | 2025-04-01 | 2025-06-20 | 苏州嘉都机械科技有限公司 | Die casting mold for automobile steering motor end cover processing |
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