A die-casting mold for automobile parts

Abstract

The present invention relates to the technical field of die casting molds, and in particular to a die casting mold for automobile parts, which includes a movable mold, a static mold, a first core and an air jet mechanism. The static mold is provided with a first cavity; the movable mold is stacked relative to the static mold in the vertical direction, the movable mold is located below the static mold, the movable mold is provided with a second cavity corresponding to the position of the first cavity, and the second cavity is connected with the first cavity to jointly constitute a casting cavity for forming a casting; the first core is provided in the static mold, and at least part of the structure of the first core is accommodated in the first cavity; the air jet mechanism is provided in the first core, and the first core is provided with an air channel, one end of the air channel is connected with the air jet mechanism, and the other end is connected with the first cavity, and the gas ejected by the air jet mechanism is sprayed toward the first cavity after passing through the air channel. When the mold is opened, the airflow ejected by the air jet mechanism impacts the surface of the casting, which is beneficial to reduce the bonding force between the casting and the first cavity and the first core, thereby helping to reduce the damage to the casting surface during the demoulding process.

Description

Technical Field

[0001] The invention relates to a die-casting die, in particular to a die-casting die for automobile parts. Background Art

[0002] Flange is abbreviated as flange, which usually refers to a disk-like metal body with several fixed connection holes around it to achieve the connection between different pipes. Flanges are widely used in the automotive field. As an important automotive part, they are usually manufactured by die casting.

[0003] At present, there is a problem when using die-casting molds to manufacture flanges: during the mold opening process, due to the stripping force between the casting and the core surface and the inner wall of the cavity (that is, the force that tends to stick between the casting and the core surface and the inner wall of the cavity), it is easy to cause scratches on the surface of the casting, thereby reducing the processing quality of the casting. Summary of the invention

[0004] Based on this, it is necessary to provide a die-casting mold for automobile parts to address the problem that the current die-casting mold is easy to scratch the surface of the casting when the mold is opened.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A die-casting mold for automobile parts, comprising: a movable mold, a static mold, a first core and an injection mechanism. The static mold is provided with a first cavity. The movable mold is stacked relative to the static mold in the vertical direction, and the movable mold is located below the static mold. The movable mold is provided with a second cavity corresponding to the position of the first cavity, and the second cavity is connected to the first cavity to jointly constitute a casting cavity for forming a casting. The first core is arranged in the static mold, and at least part of the structure of the first core is accommodated in the first cavity. The injection mechanism is arranged in the first core, and the first core is provided with an air channel, one end of the air channel is connected to the injection mechanism, and the other end is connected to the first cavity, and the gas injected by the injection mechanism is sprayed toward the first cavity after passing through the air channel.

[0007] In one embodiment, a first receiving groove is provided on the side of the first core away from the movable mold, a second receiving groove is provided on the side of the first core close to the movable mold, a partition plate is provided between the first receiving groove and the second receiving groove, and a cover plate is provided on the end of the first receiving groove away from the partition plate, and the cover plate covers the opening of the first receiving groove. The jet mechanism includes a movable cone, a connecting rod, an extrusion plate and a rotating ventilation assembly. The movable cone is movably arranged in the second receiving groove, the connecting rod is passed through the partition plate, one end of the connecting rod is connected to the movable cone, and the other end is connected to the rotating ventilation assembly, the extrusion plate is sleeved on the connecting rod and is located in the first receiving groove, the side wall of the extrusion plate is in contact with the inner side wall of the first receiving groove, the extrusion plate, the cover plate and the first receiving groove jointly define an air cavity, and a first one-way air valve is provided on the cover plate, and the first one-way air valve is conducted from the side of the cover plate away from the air cavity to the side close to the air cavity. The die-casting mold for automobile parts also includes a second core, which is arranged in the movable mold. At least part of the structure of the second core is accommodated in the second cavity. The second core is arranged opposite to the first core and abuts against the movable cone. The rotary vent assembly is arranged in the air cavity, and the rotary vent assembly is provided with a vent hole. The connecting rod is used to move in the vertical direction to drive the rotary vent assembly to rotate. When the connecting rod moves in a direction close to the cover plate, the rotary vent assembly rotates so that the vent hole can be misaligned with the opening of the airway, so that the air cavity is isolated from the airway; when the connecting rod moves in a direction away from the cover plate, the rotary vent assembly rotates so that the vent hole can be aligned with the opening of the airway, so that the air cavity is connected to the airway.

[0008] In one of the embodiments, the rotary ventilation assembly includes a swivel, a connecting ring, a friction ring and a middle rotating cylinder which are coaxially arranged in sequence from the outside to the inside; the swivel is rotatably arranged in the air cavity and fits with the inner wall of the air cavity, and the ventilation hole is arranged on the swivel; the connecting ring is spaced apart from the swivel and fixedly connected to the swivel; the inner wall of the connecting ring is provided with a first ring groove, and at least part of the structure of the friction ring is movably embedded in the first ring groove; the outer wall of the middle rotating cylinder is provided with a second ring groove, and at least part of the structure of the friction ring is fixedly embedded in the second ring groove; the inner wall of the middle rotating cylinder is provided with a spiral groove extending in the vertical direction, and the side wall of the connecting rod is provided with a protrusion, which is located in the spiral groove. When the connecting rod moves in the vertical direction, the protrusion can move along the spiral groove to drive the middle rotating cylinder to rotate; when the swivel is not subjected to external force, the middle rotating cylinder can drive the connecting ring and the swivel to rotate synchronously when it rotates.

[0009] In one embodiment, the die-casting mold for automobile parts also includes a limiting mechanism, which is arranged between the inner wall of the air cavity and the rotating ventilation assembly. The limiting mechanism is used to limit the rotation angle of the rotating ventilation assembly so that the ventilation hole can be selectively aligned or misaligned with the opening of the airway.

[0010] In one of the embodiments, the limiting mechanism includes a limiting groove and a limiting slider; the limiting groove is arranged on the inner wall of the air cavity, the limiting groove extends along the circumference of the swivel, the limiting slider is arranged on the outer wall of the swivel, and the limiting slider is movably embedded in the limiting groove; a first limiting surface and a second limiting surface are respectively arranged at both ends of the limiting groove, and when the limiting slider is in contact with the first limiting surface, the vent hole is aligned with the opening of the air duct to connect the air duct with the air cavity; when the limiting slider is in contact with the second limiting surface, the vent hole and the opening of the air duct are misaligned to disconnect the air duct from the air cavity.

[0011] In one embodiment, the die-casting mold for automobile parts also includes a guide and limiting mechanism, which is arranged between the inner wall of the first accommodating groove and the extrusion plate; the guide and limiting mechanism is used to guide the extrusion plate to move in the vertical direction, and the guide and limiting mechanism is also used to limit the rotation of the extrusion plate.

[0012] In one embodiment, the guide limit mechanism includes a guide limit groove and a guide limit block; the guide limit groove is arranged on the inner side wall of the first accommodating groove along the vertical direction, the guide limit block is arranged on the side wall of the extrusion plate, and the guide limit block can be movably embedded in the guide limit groove.

[0013] In one embodiment, a second one-way air valve is provided in the vent hole, and the second one-way air valve is connected from the air cavity to the airway.

[0014] In one embodiment, one end of the air channel is connected to the air cavity, and the other end is connected to the second receiving groove; a plurality of air channels are provided, and the plurality of air channels are distributed at intervals along the circumference of the first receiving groove.

[0015] In one of the embodiments, the die-casting mold for automobile parts also includes a static mold base and a dynamic mold base relatively stacked in the vertical direction, the dynamic mold base is located below the static mold base; the static mold is embedded in the surface of the static mold base facing the dynamic mold base, and the dynamic mold is embedded in the surface of the dynamic mold base facing the static mold base; the static mold base is provided with an air guide channel, the air guide channel connects the air cavity with the outside, so that the outside air can enter the air cavity through the first one-way air valve.

[0016] The beneficial effects of the present invention are:

[0017] The present invention provides a die-casting mold for automobile parts, which is provided with an injection mechanism and an air channel arranged on a first core. Since one end of the air channel is connected to the injection mechanism and the other end is connected to a first cavity, during the mold opening process, the gas injected by the injection mechanism can be blown toward the first cavity along the air channel, thereby generating an impact on the casting in the first cavity, so as to reduce the stripping force between the casting and the inner wall of the first cavity and between the casting and the outer surface of the first core, thereby reducing the scratches on the casting surface caused by the stripping effect of the mold on the casting during the mold opening process, thereby protecting the casting and improving the processing quality of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a die-casting mold for automobile parts in one embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of a die-casting mold for an automobile part shown in another perspective;

[0020] Figure 3 for Figure 2 The cross-sectional view of the die-casting mold of the automobile part shown in the AA direction;

[0021] Figure 4 for Figure 3 A magnified view of part A;

[0022] Figure 5 for Figure 4 A cross-sectional view of the rotary vent assembly shown;

[0023] Figure 6 for Figure 4 Structural exploded diagram of the jet mechanism shown.

[0024] in:

[0025] 100. Die-casting mold for automobile parts; 10. Static mold; 101. First cavity; 102. Plug slot; 11. Moving mold; 201. Second cavity; 12. First core; 121. Airway; 122. First receiving groove; 1221. First hole section; 1222. Second hole section; 1223. Step surface; 123. Second receiving groove; 124. Partition plate; 125. Cover plate; 13. Second core; 14. Jet mechanism; 141. Moving cone; 142. Connecting rod; 143. Extrusion plate; 144. Rotating ventilation assembly; 1441. Swivel; 1442. Connecting ring; 14 43. Friction ring; 1444. Rotating cylinder; 1445. Air vent; 1446. First annular groove; 1447. Second annular groove; 1448. Spiral groove; 1449. Bump; 145. Air cavity; 146. First one-way air valve; 147. Second one-way air valve; 15. Casting cavity; 16. Limiting mechanism; 161. Limiting slide groove; 1611. First limiting surface; 1612. Second limiting surface; 162. Limiting slider; 17. Guide limiting mechanism; 171. Guide limiting groove; 172. Guide limiting block; 18. Stationary mold seat; 181. Air guide channel; 19. Moving mold seat. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0028] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] See also Figure 1 , Figure 2 and Figure 3 The present embodiment provides a die-casting mold 100 for automobile parts, which is used for die-casting automobile parts. For example, the automobile parts can be any metal parts such as flanges, engine housings, etc.

[0030] See also Figure 3 and Figure 4 The die-casting mold 100 of the automobile part includes a static mold 10 , a dynamic mold 11 , a first core 12 and an air injection mechanism 14 .

[0031] The static mold 10 is provided with a first cavity 101, and the specific shape of the first cavity 101 is determined by the automobile part to be manufactured. The movable mold 11 is stacked relative to the static mold 10 in the vertical direction, and the movable mold 11 is located below the static mold 10. The movable mold 11 is provided with a second cavity 201 corresponding to the position of the first cavity 101, and the specific shape of the second cavity 201 is determined by the automobile part to be manufactured. When the static mold 10 and the movable mold 11 are in a state of being fitted, the second cavity 201 is connected to the first cavity 101 to jointly constitute a casting cavity 15 for forming a casting. When the static mold 10 and the movable mold 11 are separated, the first cavity 101 and the second cavity 201 are separated from each other so that the casting can be removed from the casting cavity 15.

[0032] The first core 12 is disposed in the static mold 10, and at least part of the structure of the first core 12 is accommodated in the first cavity 101. As a specific example, in this embodiment, the first core 12 is substantially cylindrical, and the axial direction of the first core 12 is arranged along the vertical direction. In other embodiments, the first core 12 can also be in any shape such as a cube or a rectangular parallelepiped, and the specific shape and setting position of the first core 12 are determined by the automotive parts to be manufactured.

[0033] The jet mechanism 14 is disposed on the first core 12. The first core 12 is provided with an air channel 121, one end of the air channel 121 is connected to the jet mechanism 14, and the other end is connected to the first cavity 101. The gas jetted by the jet mechanism 14 passes through the air channel 121 and then sprays toward the first cavity 101. As a specific example, in this embodiment, the air channel 121 is a channel directly opened on the first core 12. In other embodiments, the air channel 121 can also be a channel of an air pipe penetrating the first core 12.

[0034] Through the above arrangement, when the die-casting mold 100 of the above-mentioned automobile parts is used to manufacture automobile parts, it is necessary to place the die-casting mold on a horizontal processing plane, and then connect the movable mold 11 to the driving system, and the driving system is used to drive the movable mold 11 to move in the vertical direction, so that the movable mold 11 can fit or separate with the static mold 10. During processing, the driving system first drives the movable mold 11 to fit with the static mold 10, so that the first cavity 101 and the second cavity 201 are combined to form a casting cavity 15, and then molten metal is injected into the casting cavity 15 through a high-speed pressure system. After the molten metal in the casting cavity 15 is cooled and solidified, a casting, that is, the automobile part to be manufactured, can be obtained. Then the driving system drives the movable mold 11 to move away from the static mold 10. In the above process, the jet mechanism 14 can spray gas into the air channel 121, and the gas is blown into the first cavity 101 through the air channel 121, thereby generating an impact force on the surface of the casting close to the first cavity 101 and the surface of the casting close to the first core 12. The above impact force is beneficial to reduce the demolding force between the casting and the inner wall of the first cavity 101, and the outer surface of the casting and the first core 12, which is beneficial to separate the casting from the inner wall of the first cavity 101, and the outer surface of the casting and the first core 12. Therefore, the above setting can reduce the scratches on the surface of the casting caused by the demolding effect of the mold on the casting during the mold opening process, thereby protecting the casting and improving the processing quality of the casting.

[0035] See also Figure 1 , Figure 2 and Figure 3 In some embodiments, the die-casting mold 100 for automobile parts further includes a static mold seat 18 and a dynamic mold seat 19 relatively stacked in the vertical direction. Both the static mold seat 18 and the dynamic mold seat 19 are roughly rectangular. The dynamic mold seat 19 is located below the static mold seat 18. The dynamic mold seat 19 can move in the vertical direction to fit with or separate from the static mold seat 18. The static mold 10 is embedded in the surface of the static mold seat 18 facing the dynamic mold seat 19, and the dynamic mold 11 is embedded in the surface of the dynamic mold seat 19 facing the static mold seat 18. When the static mold seat 18 fits with the dynamic mold seat 19, the static mold 10 fits with the dynamic mold 11, and when the static mold seat 18 separates from the dynamic mold seat 19, the static mold 10 separates from the dynamic mold 11.

[0036] See also Figure 3 , Figure 4 and Figure 5In some embodiments, a first receiving groove 122 is provided on the side of the first core 12 facing away from the movable mold 11, and a second receiving groove 123 is provided on the side of the first core 12 close to the movable mold 11. As a specific example, the first receiving groove 122 is roughly cylindrical, and the first receiving groove 122 extends in the vertical direction, and the second receiving groove 123 is roughly truncated cone-shaped. A partition plate 124 is provided between the first receiving groove 122 and the second receiving groove 123, and the partition plate 124 separates the first receiving groove 122 from the second receiving groove 123. A cover plate 125 is provided at one end of the first receiving groove 122 away from the partition plate 124, and the cover plate 125 covers the opening of the first receiving groove 122.

[0037] The jet mechanism 14 includes a moving cone 141, a connecting rod 142, a pressing plate 143 and a rotating ventilation assembly 144. The moving cone 141 is substantially truncated cone-shaped, and the shape of the moving cone 141 matches the shape of the second receiving groove 123. The moving cone 141 is movably disposed in the second receiving groove 123.

[0038] The connecting rod 142 is in the shape of a round rod. The connecting rod 142 is vertically arranged. The connecting rod 142 passes through the partition plate 124 . One end of the connecting rod 142 is connected to the moving cone 141 , and the other end is connected to the rotating ventilation component 144 .

[0039] The extrusion plate 143 is in the shape of a circular plate. The extrusion plate 143 is sleeved on the connecting rod 142 and is located in the first receiving groove 122 . The side wall of the extrusion plate 143 is in contact with the inner wall of the first receiving groove 122 .

[0040] The extrusion plate 143, the cover plate 125 and the first receiving groove 122 together define an air cavity 145. It should be noted that the air cavity 145 is a part of the cavity formed by the first receiving groove 122 and the cover plate 125. The air cavity 145 can be understood as the cavity in the area between the extrusion plate 143 and the cover plate 125 in the first receiving groove 122. When the extrusion plate 143 moves along the first receiving groove 122, the volume of the air cavity 145 also changes accordingly. Specifically, when the extrusion plate 143 moves in a direction away from the cover plate 125, the volume of the air cavity 145 increases, and when the extrusion plate 143 moves in a direction close to the cover plate 125, the volume of the air cavity 145 decreases.

[0041] The cover plate 125 is provided with a first one-way air valve 146, which is connected from the side of the cover plate 125 away from the air cavity 145 to the side close to the air cavity 145. That is, the outside air can enter the air cavity 145 through the first one-way air valve 146 (i.e., along the Figure 4 The air in the air cavity 145 is directed in the direction indicated by the arrow b in the middle), but the air in the air cavity 145 cannot be discharged from the air cavity 145 through the first one-way air valve 146. The first one-way air valve 146 is used to allow external air to enter the air cavity 145 when the volume of the air cavity 145 increases.

[0042] The die-casting mold 100 for automobile parts also includes a second core 13, which is arranged in the movable mold 11, and at least part of the structure of the second core 13 is accommodated in the second cavity 201. The second core 13 is arranged relative to the first core 12 and abuts against the moving cone 141. As a specific example, in this embodiment, the second core 13 is roughly cylindrical, and the axial direction of the second core 13 is arranged along the vertical direction. In other embodiments, the second core 13 can also be any shape such as a cube or a rectangular parallelepiped. The specific shape and setting position of the second core 13 are determined by the automobile parts to be manufactured.

[0043] The rotating vent assembly 144 is disposed in the air cavity 145, and is provided with a vent hole 1445. The connecting rod 142 is used to move in the vertical direction to drive the rotating vent assembly 144 to rotate. When the connecting rod 142 moves in a direction close to the cover plate 125, the rotating vent assembly 144 rotates so that the vent hole 1445 can be misaligned with the opening of the air passage 121, so that the air cavity 145 is isolated from the air passage 121. When the connecting rod 142 moves in a direction away from the cover plate 125, the rotating vent assembly 144 rotates so that the vent hole 1445 can be aligned with the opening of the air passage 121, so that the air cavity 145 is connected to the air passage 121.

[0044] Through the above arrangement, during the mold closing process, when the movable mold 11 moves toward the direction close to the static mold 10, the second core 13 can push the movable cone 141 to move toward the direction close to the cover plate 125, that is, the second core 13 can push the movable cone 141 to move vertically upward, and in the above process, the connecting rod 142 and the extrusion plate 143 will move synchronously with the movable cone 141. Since the connecting rod 142 moves toward the direction close to the cover plate 125 (that is, moves vertically upward), it will drive the rotating ventilation component 144 to rotate, so that the vent hole 1445 is misaligned with the opening of the air channel 121, so that the air cavity 145 is isolated from the air channel 121, and since the extrusion plate 143 moves toward the direction close to the cover plate 125 (that is, moves vertically upward), the volume of the air cavity 145 will be reduced, so in the above process, the air in the air cavity 145 will be compressed to a high-pressure state, so when the static mold 10 and the movable mold 11 are fitted, the air cavity 145 is isolated from the air channel 121, and high-pressure gas exists in the air cavity 145. During the mold opening process, when the movable mold 11 moves away from the static mold 10, the second core 13 moves away from the movable cone 141, so the second core 13 loses its support effect on the movable cone 141. The high-pressure gas in the air cavity 145 will push the extrusion plate 143 to move away from the cover plate 125 (i.e., move vertically downward). In the above process, due to the increase in the volume of the air cavity 145, the outside air will enter the air cavity 145 through the first one-way air valve 146, and the connecting rod 142 and the movable cone 141 will move synchronously with the extrusion plate 143, and the movable cone 141 will gradually move out of the second receiving groove 123. As the connecting rod 142 moves away from the cover plate 125 (i.e., moves vertically downward), it drives the rotating ventilation assembly 144 to rotate, thereby aligning the vent hole 1445 with the opening of the air duct 121, so that the air cavity 145 is connected to the air duct 121. Therefore, the high-pressure gas in the air cavity 145 can be sprayed into the air duct 121 and then blown into the first cavity 101, so as to reduce the demolding force between the casting and the inner wall of the first cavity 101 and the outer surface of the casting and the first core 12, which is beneficial to the separation of the casting from the inner wall of the first cavity 101 and the casting from the first core 12, and reduces the abrasion suffered by the casting during the mold opening process.

[0045] See also Figure 4 , Figure 5 and Figure 6 In some embodiments, the rotary ventilation assembly 144 includes a rotating ring 1441, a connecting ring 1442, a friction ring 1443 and a middle rotating cylinder 1444 which are coaxially arranged in sequence from the outside to the inside.

[0046] The swivel 1441 is roughly annular and is rotatably disposed in the air cavity 145 and fits against the inner wall of the air cavity 145 . The vent hole 1445 is disposed in the swivel 1441 , and the axial direction of the vent hole 1445 is disposed along the radial direction of the swivel 1441 .

[0047] The connecting ring 1442 is roughly annular, and is spaced apart from the rotating ring 1441 and fixedly connected to the rotating ring 1441. For example, the connecting ring 1442 can be fixedly connected to the rotating ring 1441 through a connecting piece in any form such as a block or a rod. The connecting ring 1442 can rotate synchronously with the rotating ring 1441.

[0048] The inner wall of the connecting ring 1442 is provided with a first annular groove 1446. The friction ring 1443 is substantially annular, and at least part of the friction ring 1443 is movably embedded in the first annular groove 1446. The friction ring 1443 can rotate synchronously with the connecting ring 1442, or can rotate independently relative to the connecting ring 1442.

[0049] The rotating cylinder 1444 is roughly cylindrical, and the outer wall of the rotating cylinder 1444 is provided with a second annular groove 1447. At least part of the structure of the friction ring 1443 is fixedly embedded in the second annular groove 1447. The rotating cylinder 1444 fits the inner wall of the connecting ring 1442 to achieve the connection between the rotating cylinder 1444 and the connecting ring 1442. The friction ring 1443 and the rotating cylinder 1444 rotate synchronously.

[0050] The inner side wall of the middle rotating cylinder 1444 is provided with a spiral groove 1448 extending in the vertical direction, and the side wall of the connecting rod 142 is provided with a protrusion 1449, and the protrusion 1449 is located in the spiral groove 1448. When the connecting rod 142 moves in the vertical direction, the protrusion 1449 can move along the spiral groove 1448 to drive the middle rotating cylinder 1444 to rotate. When the rotating ring 1441 is not subjected to external force, the middle rotating cylinder 1444 can drive the connecting ring 1442 and the rotating ring 1441 to rotate synchronously. It should be noted that the above-mentioned "the rotating ring 1441 is not subjected to external force" means that the rotating ring 1441 is not subjected to external force that hinders the rotation of the rotating ring 1441, that is, the rotation of the rotating ring 1441 is not hindered.

[0051] Through the above arrangement, when the connecting rod 142 moves in the vertical direction, the protrusion 1449 moves along the spiral groove 1448 to drive the middle rotating cylinder 1444 to rotate, and the friction ring 1443 rotates synchronously with the middle rotating cylinder 1444. When the rotating ring 1441 is not subjected to an external force that hinders its own rotation, the friction ring 1443 will drive the connecting ring 1442 and the rotating ring 1441 to rotate synchronously, thereby changing the relative arrangement relationship between the vent hole 1445 and the opening of the airway 121. When the rotating ring 1441 is subjected to an external force that hinders its own rotation, the rotating ring 1441 and the connecting ring 1442 cannot be driven to rotate by the friction ring 1443, and at this time, only the middle rotating cylinder 1444 and the friction ring 1443 rotate synchronously. By controlling the moving direction of the connecting rod 142, the rotation direction of the middle rotating cylinder 1444 can be changed, thereby realizing the adjustment of the rotation direction of the rotating ring 1441. In summary, the above arrangement can utilize the vertical movement of the connecting rod 142 to drive the swivel 1441 to rotate, thereby adjusting the positional relationship between the vent hole 1445 and the opening of the air duct 121, and further achieving alignment and misalignment adjustment of the vent hole 1445 and the opening of the air duct 121.

[0052] In some embodiments, the die-casting mold 100 for automobile parts further includes a limiting mechanism 16. The limiting mechanism 16 is disposed between the inner side wall of the air cavity 145 and the rotating vent assembly 144, and the limiting mechanism 16 is used to limit the rotation angle of the rotating vent assembly 144 so that the vent hole 1445 can selectively be aligned with or misaligned with the opening of the airway 121. The above-mentioned "the vent hole 1445 can selectively be aligned with or misaligned with the opening of the airway 121" can be understood as that, under the limiting action of the limiting mechanism 16, the vent hole 1445 can be aligned with the opening of the airway 121, and the vent hole 1445 can also be misaligned with the opening of the airway 121. Specifically, through the above-mentioned arrangement, during the mold closing process, the limiting mechanism 16 keeps the vent hole 1445 and the opening of the air duct 121 misaligned. At this time, the air cavity 145 is isolated from the air duct 121, and the extrusion plate 143 can compress the air in the air cavity 145 to form high-pressure gas in the air cavity 145; during the mold opening process, the limiting mechanism 16 keeps the vent hole 1445 and the opening of the air duct 121 aligned. At this time, the air cavity 145 is connected to the air duct 121, and the high-pressure gas in the air cavity 145 is blown toward the first cavity 101 along the air duct 121 to reduce the demolding force between the casting and the first cavity 101 and the inner wall and between the casting and the outer surface of the first core 12, thereby reducing the abrasions on the casting surface caused by the demolding action during the mold opening process.

[0053] In some embodiments, the limiting mechanism 16 includes a limiting slide 161 and a limiting slider 162. The limiting slide 161 is arranged on the inner side wall of the air cavity 145, and the limiting slide 161 extends along the circumference of the rotating ring 1441. The limiting slider 162 is arranged on the outer side wall of the rotating ring 1441, and the limiting slider 162 is movably embedded in the limiting slide 161. The two ends of the limiting slide 161 are respectively provided with a first limiting surface 1611 and a second limiting surface 1612. Among them, the first limiting surface 1611 and the second limiting surface 1612 can be two end surfaces of the limiting slide 161. When the limiting slider 162 is in contact with the first limiting surface 1611, the vent 1445 is aligned with the opening of the airway 121 so that the airway 121 is connected with the air cavity 145. When the limiting slide block 162 is in contact with the second limiting surface 1612, the vent hole 1445 is misaligned with the opening of the air passage 121 to disconnect the air passage 121 from the air cavity 145. In other embodiments, the limiting slide groove 161 may be disposed on the outer side wall of the rotating ring 1441, and the limiting slide block 162 may be disposed on the inner side wall of the air cavity 145.

[0054] With the above arrangement, when the rotating ring 1441 drives the limiting slider 162 to rotate until the limiting slider 162 is in contact with the first limiting surface 1611, the rotating ring 1441 cannot continue to rotate due to the first limiting surface 1611 blocking the limiting slider 162. At this time, the vent hole 1445 is aligned with the opening of the airway 121 so that the airway 121 is connected to the air cavity 145. When the rotating ring 1441 drives the limiting slider 162 to rotate in another direction until the limiting slider 162 is in contact with the second limiting surface 1612, the rotating ring 1441 cannot continue to rotate due to the second limiting surface 1612 blocking the limiting slider 162. At this time, the vent hole 1445 is misaligned with the opening of the airway 121 so that the airway 121 is isolated from the air cavity 145.

[0055] Specifically, through the above arrangement, during the mold closing process, the swivel 1441 drives the limiting slider 162 to rotate until the limiting slider 162 is in contact with the second limiting surface 1612, so that the vent hole 1445 and the opening of the air channel 121 remain misaligned. At this time, the air cavity 145 is isolated from the air channel 121, and the extrusion plate 143 can compress the air in the air cavity 145 to form high-pressure gas in the air cavity 145; during the mold opening process, the swivel 1441 drives the limiting slider 1 62 is rotated until the limit slider 162 is in contact with the first limit surface 1611, so that the vent hole 1445 is aligned with the opening of the air channel 121. At this time, the air cavity 145 is connected with the air channel 121, and the high-pressure gas in the air cavity 145 is blown toward the first cavity 101 along the air channel 121 to reduce the demolding force between the casting and the first cavity 101 and the inner wall, and between the casting and the outer surface of the first core 12, thereby reducing the scratches on the casting surface caused by the demolding effect during the mold opening process.

[0056] In some embodiments, the first receiving groove 122 includes a first hole section 1221 and a second hole section 1222 connected in series, the first hole section 1221 and the second hole section 1222 are coaxially arranged circular holes, and the first hole section 1221 is located on the side of the second hole section 1222 away from the second receiving groove 123. The aperture of the first hole section 1221 is larger than the aperture of the second hole section 1222, so a circular step surface 1223 is formed at the junction of the first hole section 1221 and the second hole section 1222. The swivel 1441 is arranged in the first hole section 1221, the side wall of the swivel 1441 is in contact with the inner wall of the first hole section 1221, and the bottom surface of the swivel 1441 is in contact with the step surface 1223. Through the above arrangement, the step surface 1223 can play a role in supporting the swivel 1441, thereby improving the stability of the installation of the swivel 1441 and facilitating the stable rotation of the swivel 1441.

[0057] In some embodiments, the die-casting mold 100 for automobile parts further includes a guide and limit mechanism 17, which is disposed between the inner side wall of the first receiving groove 122 and the extrusion plate 143. The guide and limit mechanism 17 is used to guide the extrusion plate 143 to move in the vertical direction, and the guide and limit mechanism 17 is also used to limit the rotation of the extrusion plate 143. Through the above arrangement, the guide and limit mechanism 17 can guide the movement of the extrusion plate 143, the connecting rod 142 and the moving cone 141 in the vertical direction and limit the rotation.

[0058] In some embodiments, the guide limiting mechanism 17 includes a guide limiting groove 171 and a guide limiting block 172. The guide limiting groove 171 is vertically arranged on the inner side wall of the first receiving groove 122, and the guide limiting block 172 is arranged on the side wall of the extrusion plate 143, and the guide limiting block 172 is movably embedded in the guide limiting groove 171.

[0059] Through the above arrangement, since the guide limit block 172 is embedded in the guide limit groove 171, and the guide limit groove 171 is arranged along the vertical direction, the guide limit block 172 can only move along the vertical direction and cannot rotate, so the extrusion plate 143, the connecting rod 142 and the moving cone 141 can only move along the vertical direction and cannot rotate.

[0060] In some other embodiments, the guide limit mechanism 17 includes a guide limit strip and a guide slot. The guide limit strip is vertically arranged on the inner wall of the first accommodating slot 122. The guide slot is opened on the side wall of the extrusion plate 143. The guide limit strip is clipped into the guide slot.

[0061] In some embodiments, a second one-way valve 147 is disposed in the vent hole 1445, and the second one-way valve 147 is connected from the air cavity 145 to the airway 121 (i.e., along the Figure 4The second one-way air valve 147 is used to prevent the outside air from entering the air cavity 145 from the air passage 121, so as to limit the injection direction of the gas in the air cavity 145.

[0062] In some embodiments, one end of the air channel 121 is connected to the air cavity 145, and the other end is connected to the second receiving groove 123. A plurality of air channels 121 are provided, and the plurality of air channels 121 are distributed at intervals along the circumference of the first receiving groove 122. Through the above arrangement, since the air channel 121 is connected to the second receiving groove 123, and the second receiving groove 123 is connected to the first cavity 101, the connection between the air channel 121 and the first cavity 101 is achieved. Since a plurality of air channels 121 are provided, the gas in the air cavity 145 can be ejected from a plurality of different positions along the plurality of air channels 121, thereby achieving jetting to a plurality of different positions of the casting, so as to further reduce the stripping force between the casting and the mold part, and improve the protection effect on the casting.

[0063] In some embodiments, the static mold base 18 is provided with an insertion groove 102, and at least a part of the structure of the first core 12 is inserted into the insertion groove 102. The static mold base 18 is provided with an air guide channel 181, which is connected to the insertion groove 102, so that the air guide channel 181 connects the air cavity 145 with the outside, so that the outside air can enter the air cavity 145 through the first one-way air valve 146.

[0064] In summary, this embodiment provides a die-casting mold 100 for automobile parts, and its working process is as follows:

[0065] During the mold closing process, when the movable mold 11 moves toward the direction close to the static mold 10, the second core 13 can push the movable cone 141 to move toward the direction close to the cover plate 125 (i.e., move vertically upward). In the above process, the connecting rod 142 and the extrusion plate 143 will move synchronously with the movable cone 141. The movement of the connecting rod 142 toward the direction close to the cover plate 125 will drive the middle rotating cylinder 1444 to rotate, thereby causing the friction ring 1443, the connecting ring 1442 and the rotating ring 1441 to rotate synchronously, so that the vent hole 1445 is misaligned with the opening of the airway 121. When the rotating ring 1441 rotates until the protrusion 1449 fits the second limiting surface 1612, the rotating ring 1441 and the connecting ring 1442 stop rotating. At this time, the connecting rod 142 can also drive the middle rotating cylinder 1444 to drive the friction ring 1443 to rotate synchronously. Since the vent hole 1445 is misaligned with the opening of the air channel 121, the air channel 121 is isolated from the air cavity 145, and since the extrusion plate 143 moves toward the direction close to the cover plate 125, the volume of the air cavity 145 is reduced, thereby forming high-pressure gas in the air cavity 145. Therefore, when the static mold 10 and the dynamic mold 11 are attached, the vent hole 1445 is misaligned with the opening of the air channel 121, and high-pressure gas exists in the air cavity 145.

[0066] During the mold opening process, when the movable mold 11 moves away from the static mold 10, since the second core 13 moves away from the movable cone 141, the second core 13 loses its support effect on the movable cone 141. The high-pressure gas in the air cavity 145 will push the extrusion plate 143 to move away from the cover plate 125. In the above process, as the volume of the air cavity 145 increases, the outside air will enter the air cavity 145 through the first one-way air valve 146, and the connecting rod 142 and the movable cone 141 will move synchronously with the extrusion plate 143, and the movable cone 141 will gradually move out of the second receiving groove 123. As the connecting rod 142 moves away from the cover plate 125, it will drive the middle rotating cylinder 1444 to rotate in the opposite direction, thereby causing the friction ring 1443, the connecting ring 1442 and the rotating ring 1441 to rotate in the opposite direction synchronously. When the rotating ring 1441 rotates until the protrusion 1449 is in contact with the first limiting surface 1611, the vent hole 1445 is aligned with the opening of the airway 121, and then the rotating ring 1441 and the connecting ring 1442 stop rotating. The connecting rod 142 can also drive the middle rotating cylinder 1444 to drive the friction ring 1443 to rotate synchronously. Since the vent hole 1445 is aligned with the opening of the air duct 121, the air cavity 145 is connected to the air duct 121. Therefore, the high-pressure gas in the air cavity 145 can be sprayed into the air duct 121 and then blown into the first cavity 101, so as to reduce the demolding force between the casting and the inner wall of the first cavity 101 and the outer surface of the casting and the first core 12, which is beneficial to the separation of the casting from the inner wall of the first cavity 101 and the casting from the first core 12, and reduces the abrasions suffered by the casting during the mold opening process.

[0067] In summary, the die-casting mold 100 for automobile parts provided in this embodiment forms a high-pressure jet using its own structure without the aid of other jet equipment by setting up a jet mechanism 14, and blows the high-pressure airflow toward the surface of the casting to reduce the demolding force between the casting and the mold, thereby reducing the scratches on the casting surface caused by the mold during mold opening and subsequent demolding, thereby protecting the casting and improving the casting processing quality.

[0068] Furthermore, the die-casting mold 100 for the above-mentioned automobile parts can also determine the initial intake amount of gas in the air cavity 145 according to the degree of adhesion between the casting and the mold each time the mold is opened, thereby making the discharge amount of gas in the air cavity 145 different when the mold is opened next time, which can effectively alleviate the scratches on the surface of the casting and avoid the energy waste caused by taking too much gas each time.

[0069] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A die-casting mold for automobile parts, characterized in that: include: A static mold is provided with a first cavity; The movable mold is stacked opposite to the static mold in the vertical direction, and the movable mold is located below the static mold; the movable mold is provided with a second cavity corresponding to the position of the first cavity, and the second cavity is connected with the first cavity to jointly form a casting cavity for forming a casting; A first core is disposed in the static mold, and at least a portion of the structure of the first core is accommodated in the first cavity; The jet mechanism is arranged on the first core; the first core is provided with an air passage, one end of the air passage is connected with the jet mechanism, and the other end of the air passage is connected with the first cavity, and the gas jetted by the jet mechanism is sprayed toward the first cavity after passing through the air passage; A first receiving groove is provided on a side of the first core away from the movable mold, a second receiving groove is provided on a side of the first core close to the movable mold, a partition plate is provided between the first receiving groove and the second receiving groove, and a cover plate is provided at one end of the first receiving groove away from the partition plate, and the cover plate covers the opening of the first receiving groove; The jet mechanism comprises a movable cone, a connecting rod, an extrusion plate and a rotating ventilation assembly; the movable cone is movably arranged in the second receiving groove, the connecting rod is penetrated in the partition plate, one end of the connecting rod is connected to the movable cone, and the other end is connected to the rotating ventilation assembly, the extrusion plate is sleeved on the connecting rod and is located in the first receiving groove, the side wall of the extrusion plate is in contact with the inner side wall of the first receiving groove, the extrusion plate, the cover plate and the first receiving groove jointly define an air cavity, the cover plate is provided with a first one-way air valve, the first one-way air valve is conducted from the side of the cover plate away from the air cavity to the side close to the air cavity, and the outside air enters the air cavity through the first one-way air valve; The die-casting mold for automobile parts also includes a second core, which is arranged in the movable mold, at least part of the structure of the second core is accommodated in the second cavity, and the second core is arranged opposite to the first core and abuts against the movable cone; The rotary ventilator assembly is arranged in the air cavity, and the rotary ventilator assembly is provided with a vent hole. The connecting rod is used to move in the vertical direction to drive the rotary ventilator assembly to rotate; when the connecting rod moves in the direction close to the cover plate, the rotary ventilator assembly rotates so that the vent hole can be misaligned with the opening of the airway, so that the air cavity is isolated from the airway; When the connecting rod moves in a direction away from the cover plate, the rotating vent assembly rotates so that the vent hole can be aligned with the opening of the air channel, so that the air cavity is connected with the air channel, and the high-pressure gas in the air cavity is ejected into the air channel, thereby blowing toward the first cavity; The rotary ventilation assembly includes a swivel, a connecting ring, a friction ring and a middle rotating cylinder which are coaxially arranged in sequence from the outside to the inside; the swivel is rotatably arranged in the air cavity and fits with the inner wall of the air cavity, and the ventilation hole is arranged on the swivel; the connecting ring is spaced apart from the swivel and fixedly connected to the swivel; the inner wall of the connecting ring is provided with a first ring groove, and at least part of the structure of the friction ring is movably embedded in the first ring groove; the outer wall of the middle rotating cylinder is provided with a second ring groove, and at least part of the structure of the friction ring is fixedly embedded in the second ring groove; the inner wall of the middle rotating cylinder is provided with a spiral groove extending in the vertical direction, and the side wall of the connecting rod is provided with a protrusion, which is located in the spiral groove. When the connecting rod moves in the vertical direction, the protrusion can move along the spiral groove to drive the middle rotating cylinder to rotate; when the swivel is not subjected to external force, the middle rotating cylinder can drive the connecting ring and the swivel to rotate synchronously when it rotates.

2. The die-casting mold for automobile parts according to claim 1, characterized in that: The die-casting mold for automobile parts also includes a limiting mechanism, which is arranged between the inner wall of the air cavity and the rotating ventilation component. The limiting mechanism is used to limit the rotation angle of the rotating ventilation component so that the ventilation hole can be selectively aligned or misaligned with the opening of the airway.

3. The die-casting mold for automobile parts according to claim 2, characterized in that: The limiting mechanism includes a limiting groove and a limiting slider; the limiting groove is arranged on the inner wall of the air cavity, the limiting groove extends along the circumference of the swivel, the limiting slider is arranged on the outer wall of the swivel, and the limiting slider can be movably embedded in the limiting groove; the two ends of the limiting groove are respectively provided with a first limiting surface and a second limiting surface, when the limiting slider is in contact with the first limiting surface, the vent hole is aligned with the opening of the air duct to connect the air duct with the air cavity; when the limiting slider is in contact with the second limiting surface, the vent hole and the opening of the air duct are misaligned to disconnect the air duct from the air cavity.

4. The die-casting mold for automobile parts according to claim 1, characterized in that: The die-casting mold for automobile parts also includes a guide and limit mechanism, which is arranged between the inner side wall of the first accommodating groove and the extrusion plate; the guide and limit mechanism is used to guide the extrusion plate to move in the vertical direction, and the guide and limit mechanism is also used to limit the rotation of the extrusion plate.

5. The die-casting mold for automobile parts according to claim 4, characterized in that: The guide limit mechanism comprises a guide limit groove and a guide limit block; the guide limit groove is arranged on the inner side wall of the first accommodating groove along the vertical direction, the guide limit block is arranged on the side wall of the extrusion plate, and the guide limit block can be movably embedded in the guide limit groove.

6. The die-casting mold for automobile parts according to claim 1, characterized in that: A second one-way air valve is arranged in the vent hole, and the second one-way air valve is connected from the air cavity to the airway.

7. The die-casting mold for automobile parts according to claim 1, characterized in that: One end of the air channel is communicated with the air cavity, and the other end is communicated with the second containing groove; a plurality of air channels are provided, and the plurality of air channels are distributed at intervals along the circumference of the first containing groove.

8. The die-casting mold for automobile parts according to any one of claims 1 to 7, characterized in that: The die-casting mold for automobile parts also includes a static mold base and a dynamic mold base which are relatively stacked in the vertical direction, and the dynamic mold base is located below the static mold base; the static mold is embedded in the surface of the static mold base facing the dynamic mold base, and the dynamic mold is embedded in the surface of the dynamic mold base facing the static mold base; the static mold base is provided with an air guide channel, and the air guide channel connects the air cavity with the outside so that the outside air can enter the air cavity through the first one-way air valve.

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