Auto parts die-casting machine

Abstract

The present invention belongs to the technical field of die-casting, and specifically is a die-casting machine for automobile parts, comprising a machine body, a push mechanism and a positioning mechanism, wherein the push mechanism comprises: a turntable rotatably arranged on a workbench, a lower template slidably arranged on the turntable; a push plate slidably arranged on the turntable; the positioning mechanism comprises two pressing plates slidably arranged on the workbench; by arranging the positioning mechanism, after the lower template moves up and seals the bottom end of the lower mold, the two pressing plates move inward at the same time, the positioning block is inserted into the positioning groove, and the top of the pressing plate is against the bottom of the top flange of the lower template, which can make the lower template fit closely with the lower mold, and can also prevent the lower template from moving downward and horizontally, thereby improving the matching stability during the die-casting process, and by arranging the push mechanism to cooperate with the positioning mechanism, it only needs to control the rotation of the driving shaft to automatically realize the positioning of the lower template during die-casting, the removal of the lower template during demoulding, the movement of the push plate and the push demoulding work, and the degree of automation is high.

Description

Technical Field

[0001] The invention belongs to the field of die casting, in particular to a die casting machine for automobile parts. Background Art

[0002] Auto parts include die-castings, which are usually made of alloy materials with high strength, wear resistance, high temperature resistance and other properties to meet the performance requirements of automotive parts in different working environments. Among them, cylindrical auto parts include engine parts, decorative columns, connecting rods and support columns, etc., which are mostly made of metal materials such as aluminum alloy or stainless steel and are die-cast on a die-casting machine.

[0003] A patent document with publication number CN117282938B discloses a die-casting mold for automotive parts, including a die-casting table, a support frame, and a mold assembly. The lower mold plate can be lifted and lowered under the cylindrical lower mold. The upper mold plate is close to the cylindrical lower mold for mold closing, and then die-casting can be performed. After the mold is opened, after the lower mold plate opens the bottom opening of the cylindrical lower mold, the lower mold plate is driven down by a second lifting drive mechanism to open the bottom opening of the cylindrical lower mold, and then the automotive parts are all or partially pushed upward out of the cavity by a pushing mechanism, so that the automotive parts are convenient to take out. It has the characteristics of easy operation and high degree of automation.

[0004] The above technical solution still has some problems. Since the lower mold used therein is provided with a bottom opening, during the die-casting process, it is necessary to ensure that the lower mold seals the bottom opening of the lower mold. During the die-casting process, the injection of metal material into the cavity and the subsequent pressure maintaining process both cause a large pressure on the lower mold. In the above technical solution, the lower mold is only driven to rise and fall by the cooperation of the driven gear and the rack, and the position of the lower mold is not further fixed. The stability of the lower mold during the die-casting process is limited, which may affect the die-casting effect.

[0005] To this end, the present invention provides a die-casting machine for automobile parts. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: the die-casting machine for automobile parts of the present invention comprises a machine body, a workbench, an upper die assembly and a lower die assembly are arranged on the machine body, the upper die assembly comprises an upper die core movably arranged on the machine body, the lower die assembly comprises a lower die and a lower die plate, the lower die is fixedly connected to the workbench, the bottom end of the lower die is open, the longitudinal section of the lower die plate is T-shaped, the lower die plate is used to seal the bottom end opening of the lower die, and also comprises a push mechanism and a positioning mechanism:

[0008] The push mechanism comprises: a rotating disk arranged on the workbench, on which the lower template is slidably arranged; and a push plate slidably arranged on the rotating disk;

[0009] The positioning mechanism comprises two pressing plates slidably arranged on the workbench, the two pressing plates are symmetrically distributed about the lower mold, and the pressing plates are provided with a slope for pushing the push plate upward.

[0010] Preferably, the outer diameter of the push plate is smaller than the inner diameter of the lower mold.

[0011] Preferably, the positioning mechanism further comprises: a positioning block provided at the end of the pressing plate; and a positioning groove corresponding to the positioning block and provided on the side wall of the lower template.

[0012] Preferably, the positioning mechanism further includes: two rotating shafts rotatably arranged on the workbench; telescopic rods arranged on the rotating shafts, the top ends of the two telescopic rods are respectively movably connected to the two pressure plates, and the telescopic rods are inclined; and an extension spring for pushing the telescopic rods to extend.

[0013] Preferably, the positioning mechanism also includes: a transmission gear arranged on the rotating shaft; a driving shaft rotatingly arranged in the body; two arc-shaped tooth plates fixedly connected to the driving shaft, the two arc-shaped tooth plates are respectively engaged with the two transmission gears for transmission, and after the driving shaft rotates, the two transmission gears are driven to rotate synchronously in the opposite direction through the two arc-shaped tooth plates.

[0014] Preferably, the drive shaft is coaxial with the turntable, and the drive shaft passes through the inside of the turntable.

[0015] Preferably, the arc-shaped tooth plate and the lower mold assembly are staggered, and the arc-shaped tooth plate and the transmission gear are located in the same vertical plane.

[0016] Preferably, the pushing mechanism also includes: a slip ring slidably arranged on the driving shaft; an assembly ring arranged on the slip ring close to the turntable; and an assembly groove corresponding to the assembly ring is provided on the turntable. During the rotation of the driving shaft, the slip ring moves and the assembly ring is inserted into the assembly groove, and the driving shaft drives the turntable to rotate through the cooperation between the assembly ring and the assembly groove.

[0017] Preferably, the pushing mechanism also includes: a return spring for pushing the slip ring away from the turntable, the two ends of the return spring being respectively connected to the slip ring and the drive shaft; a protrusion provided on the side of the slip ring away from the turntable, the side wall of the protrusion being provided with a slope; a vertical plate fixedly connected to the workbench, during the rotation of the slip ring, after the protrusion contacts the vertical plate, the vertical plate drives the slip ring closer to the turntable by pushing the protrusion.

[0018] Preferably, the pushing mechanism also includes: a first rack fixedly connected to the lower template; a second rack fixedly connected to the pushing plate; a first arc-shaped tooth segment and a second arc-shaped tooth segment provided on the slip ring, the first arc-shaped tooth segment and the second arc-shaped tooth segment being meshed and connected with the first rack and the second rack respectively.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The automotive parts die-casting machine described in the present invention has a positioning mechanism. After the lower template moves up and seals the bottom end of the lower mold, the two pressure plates move inward at the same time. After the pressure plates move inward, the positioning blocks are inserted into the positioning grooves, and the tops of the pressure plates are against the bottom of the top flange of the lower template. This can make the lower template fit tightly with the lower mold, improve the sealing performance after the lower template and the lower mold are matched, and prevent the lower template from moving downward and horizontally, thereby improving the matching stability of the lower template and the lower mold during the die-casting process.

[0021] 2. The automotive parts die-casting machine described in the present invention, by setting a push mechanism in cooperation with a positioning mechanism, can automatically realize the positioning of the lower template during die-casting, the removal of the lower template during demolding, the movement of the push plate and the push demolding work by only controlling the rotation of the drive shaft. It has a high degree of automation and, compared with the prior art, eliminates the trouble of setting up multiple drive systems, making it easy to use and maintain.

[0022] 3. In the die-casting machine for automobile parts described in the present invention, in the demolding process, in order to ensure that the die-casting is ejected smoothly, the push plate preferably generates a vertical upward force on the die-casting, which requires first removing the lower template from under the lower mold, and then moving the push plate to directly under the lower mold. In the prior art, there are too many operating steps and driving systems used. During the operation of the die-casting machine, the lower template and the push plate are both slidably arranged on the turntable. Only by rotating the turntable can the lower template be removed and the push plate be moved in synchronously, which makes the operation more convenient and the work efficiency higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 is a three-dimensional diagram of the first embodiment of the present invention;

[0025] Figure 2 It is a cross-sectional view of the internal structure of the workbench;

[0026] Figure 3 This is the front view of the matching structure of the ejection mechanism, the positioning mechanism and the lower mold;

[0027] Figure 4 It is the exploded view of the lower template, turntable, push plate and pressure plate;

[0028] Figure 5 This is the exploded view of the drive shaft, turntable, slip ring and pressure plate;

[0029] Figure 6 It is a back view of the matching structure of the ejection mechanism, the positioning mechanism and the lower mold;

[0030] Figure 7 This is the exploded view of the drive shaft, turntable and slip ring from the back;

[0031] In the figure: 1. machine body; 100. workbench; 200. upper mold core; 300. lower mold; 400. lower mold plate; 2. push mechanism; 21. turntable; 211. assembly groove; 22. push plate; 23. slip ring; 231. assembly ring; 232. bump; 24. return spring; 25. vertical plate; 26. first rack; 27. second rack; 28. first arc-shaped tooth segment; 29. ​​second arc-shaped tooth segment; 3. positioning mechanism; 31. pressure plate; 32. positioning block; 33. positioning groove; 34. rotating shaft; 35. telescopic rod; 36. extension spring; 37. transmission gear; 38. driving shaft; 39. arc-shaped tooth plate. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0033] Embodiment 1: Figure 1-4 As shown, an automobile parts die-casting molding machine according to an embodiment of the present invention comprises a machine body 1, on which a workbench 100, an upper die assembly and a lower die assembly are provided, the upper die assembly comprises an upper die core 200 movably provided on the machine body 1, the lower die assembly comprises a lower die 300 and a lower die plate 400, the lower die 300 is fixedly connected to the workbench 100, the bottom end of the lower die 300 is open, the longitudinal section of the lower die plate 400 is T-shaped, the lower die plate 400 is used to seal the bottom end opening of the lower die 300, and further comprises a push mechanism 2 and a positioning mechanism 3:

[0034] The pushing mechanism 2 includes: a turntable 21 rotatably disposed on the workbench 100, the lower template 400 slidably disposed on the turntable 21; and a pushing plate 22 slidably disposed on the turntable 21;

[0035] The positioning mechanism 3 includes two pressing plates 31 slidably disposed on the workbench 100 , the two pressing plates 31 are symmetrically distributed about the lower mold 300 , and a slope for pushing the push plate 22 upward is disposed on the pressing plates 31 .

[0036] Specifically, the workbench 100 is provided with a hydraulic system, a pressurizing system, a feeding system and a cooling system. The hydraulic system is used to drive the upper mold core 200 to move. The feeding system and the pressurizing system are used to inject molten metal raw materials into the cavity after the upper mold assembly and the lower mold assembly are molded to perform die-casting molding. The cooling system is used to cool the metal after die-casting. The lower mold 300 is detachably mounted on the workbench 100. The lower mold 300 is fixed to the workbench 100 by fastening bolts and other structures. The lower mold plate 400 is in a T shape. 00, the top flange size is larger than the bottom size, the lower template 400 and the push plate 22 move along the radial direction of the turntable 21 respectively, the lower template 400 and the push plate 22 are preferably but not limited to being distributed at 90° on the turntable 21, the pressing plate 31 can slide horizontally in the workbench 100, wherein the movement of the pressing plate 31 toward the center of the turntable 21 is inward movement, and vice versa is outward movement; initially, the lower template 400 is located above the turntable 21 and directly below the lower mold 300, the push plate 22 is located on the right side of the turntable 21, and the pressing plate 31 is away from the lower template 400.

[0037] When die-casting automobile accessories such as support columns or connecting rods, the lower template 400 is started to move upward to seal the bottom end of the lower mold 300, and then the pressing plate 31 is started to move inward. By setting a slope on the pressing plate 31, the pressing plate 31 can be moved more smoothly to the bottom of the top flange of the lower template 400. After the pressing plate 31 moves inward, its top is against the bottom of the top flange of the lower template 400, which can make the lower template 400 and the lower mold 300 fit closely, improve the sealing performance after the lower template 400 and the lower mold 300 are matched, and can also prevent the lower template 400 from moving downward, thereby improving the matching stability of the lower template 400 and the lower mold 300 during the die-casting process; the upper mold core 200 is started to move downward into the lower mold assembly for mold closing, and the molten metal raw material is injected into the cavity between the upper mold core 200 and the lower mold 300 for die-casting. After cooling, a molded die-casting part is formed in the cavity;

[0038] After the automobile parts are die-cast, the upper mold core 200 is moved upward to open the mold, and then the lower mold plate 400 is moved downward to separate the lower mold plate 400 from the lower mold 300, and the bottom end opening of the lower mold 300 is opened. Due to the extrusion friction between the die-casting part and the inner wall of the cavity during the die-casting process, the die-casting part will not slide down after the bottom end of the lower mold 300 is opened; the turntable 21 is rotated to move the push plate 22 to the bottom of the lower mold 300, and the push plate 22 is started to move upward, so as to eject the die-casting part from the lower mold 300 for demolding. In this way, the die-casting of automobile parts and the push demolding work are realized.

[0039] like Figure 3 As shown, the outer diameter of the push plate 22 is smaller than the inner diameter of the lower mold 300 .

[0040] Specifically, after the ejector plate 22 is raised, it can be inserted into the lower mold 300 so as to partially or completely eject the die casting from the lower mold 300 .

[0041] like Figure 2-4 As shown, the positioning mechanism 3 further includes: a positioning block 32 disposed at the end of the pressing plate 31 ; and a positioning groove 33 corresponding to the positioning block 32 and disposed on the side wall of the lower template 400 .

[0042] Specifically, after the pressing plate 31 moves inward, the positioning block 32 is inserted into the positioning groove 33 and abuts against the inner wall of the positioning groove 33, which can prevent the lower template 400 from shaking in the horizontal direction, further improving the matching stability of the lower template 400 and the lower mold 300 during the die-casting process.

[0043] like Figure 2-5 As shown, the positioning mechanism 3 also includes: two rotating shafts 34 rotatably arranged on the workbench 100; telescopic rods 35 arranged on the rotating shafts 34, the top ends of the two telescopic rods 35 are movably connected to the two pressure plates 31 respectively, and the telescopic rods 35 are inclined; and an extension spring 36 for pushing the telescopic rods 35 to extend.

[0044] Specifically, the telescopic rod 35 maintains a stable tilt under the push of the extension spring 36, so that the pressure plate 31 maintains a stable position after moving inward or outward.

[0045] like Figure 2-6 As shown, the positioning mechanism 3 also includes: a transmission gear 37 arranged on the rotating shaft 34; a driving shaft 38 rotatably arranged in the body 1; two arc-shaped tooth plates 39 fixedly connected to the driving shaft 38, and the two arc-shaped tooth plates 39 are respectively engaged with the two transmission gears 37 for transmission. After the driving shaft 38 rotates, the two transmission gears 37 are driven to rotate synchronously in the opposite direction through the two arc-shaped tooth plates 39.

[0046] Specifically, Figure 3 As shown, the arc-shaped tooth plate 39 on the left is located above the left transmission gear 37, and the arc-shaped tooth plate 39 on the right is located below the right transmission gear 37. After the drive shaft 38 is started to rotate by a motor or other device, the drive shaft 38 drives the two rotating shafts 34 to rotate synchronously in the opposite direction through the cooperation of the two sets of arc-shaped tooth plates 39 and the transmission gear 37, thereby driving the two telescopic rods 35 to deflect in the opposite direction. After the two telescopic rods 35 are deflected, the two pressure plates 31 are driven to approach or move away from the lower template 400 at the same time.

[0047] During the reciprocating rotation of the driving shaft 38 , the two arc-shaped plates can move to the left and right sides of the two transmission gears 37 , respectively. Initially, the arc-shaped toothed plate 39 is not in contact with the transmission gears 37 .

[0048] like Figure 2-3 As shown, the drive shaft 38 is coaxial with the turntable 21 , and the drive shaft 38 passes through the inside of the turntable 21 .

[0049] Specifically, a support for supporting the turntable 21 is provided in the workbench 100 . The inner diameter of the turntable 21 is larger than the outer diameter of the driving shaft 38 . Initially, the driving shaft 38 does not drive the turntable 21 to rotate after rotating.

[0050] like Figure 3-6 As shown, the arc-shaped tooth plate 39 and the lower mold assembly are staggered, and the arc-shaped tooth plate 39 and the transmission gear 37 are located in the same vertical plane.

[0051] Specifically, the movement of the arc-shaped tooth plate 39 and the movement of the lower mold plate 400 do not interfere with each other.

[0052] Embodiment 2: Figure 2-7 As shown in Comparative Example 1, another embodiment of the present invention is:

[0053] The pushing mechanism 2 also includes: a slip ring 23 slidably arranged on the driving shaft 38; an assembly ring 231 arranged on the slip ring 23 close to the turntable 21; and an assembly groove 211 corresponding to the assembly ring 231 is provided on the turntable 21. During the rotation of the driving shaft 38, the slip ring 23 moves and the assembly ring 231 is inserted into the assembly groove 211. Then, the driving shaft 38 drives the turntable 21 to rotate through the cooperation between the assembly ring 231 and the assembly groove 211.

[0054] Specifically, the slip ring 23 can move along the axial direction of the drive shaft 38, and the assembly ring 231 and the assembly groove 211 can be friction-fitted. It should be noted that other structures that can satisfy the requirement that the drive shaft 38 can drive the turntable 21 to rotate after the assembly ring 231 contacts the assembly groove 211 are also suitable for the manufacture of the assembly ring 231 and the assembly groove 211.

[0055] Initially, the assembly ring 231 is separated from the assembly groove 211. At this time, the rotation of the drive shaft 38 does not drive the turntable 21 to rotate, and the turntable 21 remains stationary. After the sliding ring 23 is moved so that the assembly ring 231 is inserted into the assembly groove 211, the rotating drive shaft 38 rotates and drives the turntable 21 to rotate together.

[0056] like Figure 2-7 As shown, the pushing mechanism 2 also includes: a reset spring 24 for pushing the slip ring 23 away from the turntable 21, and the two ends of the reset spring 24 are respectively connected to the slip ring 23 and the driving shaft 38; a protrusion 232 is arranged on the side of the slip ring 23 away from the turntable 21, and the side wall of the protrusion 232 is provided with a slope; a vertical plate 25 fixedly connected to the workbench 100, during the rotation of the slip ring 23, after the protrusion 232 contacts the vertical plate 25, the vertical plate 25 drives the slip ring 23 to approach the turntable 21 by pushing the protrusion 232.

[0057] Specifically, slopes are provided on both sides of the protrusion 232. After the driving shaft 38 rotates, the slip ring 23 rotates accordingly. When the slope on the protrusion 232 contacts the vertical plate 25, the slip ring 23 is squeezed by the vertical plate 25 and moves toward the direction close to the turntable 21, so that the assembly ring 231 is inserted into the assembly groove 211; when the protrusion 232 is separated from the vertical plate 25, the slip ring 23 automatically moves back under the action of the reset spring 24, and the assembly ring 231 is separated from the turntable 21.

[0058] like Figure 3-7 As shown, the pushing mechanism 2 also includes: a first rack 26 fixedly connected to the lower template 400; a second rack 27 fixedly connected to the pushing plate 22; a first arc-shaped tooth segment 28 and a second arc-shaped tooth segment 29 provided on the slip ring 23, and the first arc-shaped tooth segment 28 and the second arc-shaped tooth segment 29 are respectively meshed and connected with the first rack 26 and the second rack 27.

[0059] Specifically, when the drive shaft 38 rotates and the turntable 21 is stationary, the reciprocating drive shaft 38 drives the lower template 400 to move back and forth through the cooperation of the first arc-shaped tooth segment 28 and the first rack 26 , and drives the push plate 22 to move back and forth through the cooperation of the second arc-shaped tooth segment 29 and the second rack 27 .

[0060] It should be noted that the distribution range of the first arc-shaped tooth segment 28 and the second arc-shaped tooth segment 29 can be selected according to specific circumstances.

[0061] Working principle: Take the example that two pressing plates 31 are provided, and the lower mold plate 400 and the push plate 22 are distributed at 90 degrees. Initially, the lower mold plate 400 is located above the turntable 21 and directly below the lower mold 300, the push plate 22 is located on the right side of the turntable 21, the pressing plate 31 is away from the lower mold plate 400, the assembly ring 231 is separated from the assembly groove 211, and the arc-shaped tooth plate 39 is not in contact with the transmission gear 37;

[0062] When die-casting automobile parts such as support columns or connecting rods, the driving shaft 38 is started to rotate in the forward direction. After the driving shaft 38 rotates in the forward direction, the first arc-shaped tooth segment 28 and the first rack 26 cooperate to drive the lower mold plate 400 to move upward, and the lower mold plate 400 moves upward to seal the bottom end of the lower mold 300;

[0063] Then, the two sets of arc-shaped tooth plates 39 rotate to contact with the two transmission gears 37, and drive the two rotating shafts 34 to rotate synchronously in the opposite direction, thereby driving the two telescopic rods 35 to deflect in the opposite direction. After the two telescopic rods 35 deflect, the two pressing plates 31 are driven to move inward at the same time. After the pressing plates 31 move inward, the positioning blocks 32 are inserted into the positioning grooves 33, and the top of the pressing plates 31 abuts against the bottom of the top flange of the lower template 400, which can make the lower template 400 fit closely with the lower mold 300, improve the sealing performance of the lower template 400 after matching with the lower mold 300, and prevent the lower template 400 from moving downward and horizontally, thereby improving the matching stability of the lower template 400 and the lower mold 300 during the die-casting process;

[0064] The upper mold core 200 is started to move downward into the lower mold 300 for mold closing, and the molten metal raw material is injected into the cavity between the upper mold core 200 and the lower mold 300 for die casting. After cooling, a die casting part is formed in the cavity.

[0065] After the automobile parts are die-cast, the upper mold core 200 is moved upward to open the mold;

[0066] The driving shaft 38 is started to rotate in the reverse direction. After the driving shaft 38 rotates, the two sets of arc-shaped toothed plates 39 rotate to contact the two transmission gears 37, and drive the two rotating shafts 34 to rotate in the reverse direction synchronously, thereby driving the two telescopic rods 35 to deflect in the reverse direction. After the two telescopic rods 35 deflect, the two pressing plates 31 are driven to move outward at the same time to separate from the positioning grooves 33, thereby releasing the positioning state of the lower template 400;

[0067] The driving shaft 38 continues to rotate in the reverse direction, and the first arc-shaped tooth segment 28 contacts the first rack 26. The first arc-shaped tooth segment 28 and the first rack 26 cooperate to drive the lower mold plate 400 to move downward, so that the lower mold plate 400 is separated from the lower mold 300, and the bottom end opening of the lower mold 300 is opened;

[0068] The driving shaft 38 continues to rotate in the reverse direction. After the protrusion 232 on the slip ring 23 contacts the vertical plate 25, the protrusion 232 is squeezed by the vertical plate 25, and the slip ring 23 moves toward the direction close to the turntable 21, so that the assembly ring 231 is inserted into the assembly groove 211. The driving shaft 38 drives the turntable 21 to rotate together. The turntable 21 rotates 90 degrees, and the push plate 22 moves to the bottom of the lower mold 300.

[0069] The driving shaft 38 continues to rotate in the reverse direction, and the second arc-shaped tooth segment 29 contacts the second rack 27. The push plate 22 is driven upward by the cooperation of the second arc-shaped tooth segment 29 and the second rack 27, and the die-casting part is ejected from the lower mold 300 to perform demoulding. In this way, the die-casting molding and push-out demoulding of the automobile parts are realized.

[0070] Starting the drive shaft 38 to rotate forward can restore the entire device to its initial state. During the demolding process, in order to ensure that the die-casting is ejected smoothly, the push plate 22 preferably exerts a vertical upward force on the die-casting, which requires first removing the lower template 400 from under the lower mold 300, and then moving the push plate 22 to directly under the lower mold 300. In the prior art, there are too many operating steps and driving systems used. During use, the molding machine only needs to control the rotation of the drive shaft 38 to automatically realize the positioning of the lower template 400, the removal of the lower template 400, the movement of the push plate 22, and the ejection demolding work. The molding machine has a high degree of automation. Compared with the prior art, it eliminates the trouble of setting up multiple drive systems. The removal of the lower template 400 and the movement of the push plate 22 can be performed simultaneously, which is more convenient to operate and more efficient.

[0071] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A die-casting machine for automobile parts, comprising a machine body (1), wherein a workbench (100), an upper die assembly and a lower die assembly are provided on the machine body (1), wherein the upper die assembly comprises an upper die core (200) movably arranged on the machine body (1), and the lower die assembly comprises a lower die (300) and a lower die plate (400), wherein: The lower mold (300) is fixedly connected to the workbench (100); the bottom end of the lower mold (300) is open; the longitudinal section of the lower mold plate (400) is T-shaped; the lower mold plate (400) is used to seal the bottom opening of the lower mold (300), and further comprises a pushing mechanism (2) and a positioning mechanism (3): The pushing mechanism (2) comprises: Rotating a turntable (21) disposed on the workbench (100), wherein the lower template (400) is slidably disposed on the turntable (21); A push plate (22) slidably disposed on the rotating disk (21); The positioning mechanism (3) comprises two pressing plates (31) slidably arranged on the workbench (100), the two pressing plates (31) being symmetrically distributed with respect to the lower mold (300), and the pressing plates (31) being provided with a slope for pushing the push plate (22) upward; The outer diameter of the push plate (22) is smaller than the inner diameter of the lower mold (300); The positioning mechanism (3) further comprises: A positioning block (32) provided at the end of the pressing plate (31); A positioning groove (33) corresponding to the positioning block (32) is provided on the side wall of the lower template (400); The positioning mechanism (3) further comprises: Two rotating shafts (34) rotatably arranged on the workbench (100); A telescopic rod (35) is arranged on the rotating shaft (34), the top ends of the two telescopic rods (35) are movably connected to the two pressing plates (31) respectively, and the telescopic rods (35) are inclined; An extension spring (36) for pushing the telescopic rod (35) to extend; The positioning mechanism (3) further comprises: a transmission gear (37) disposed on the rotating shaft (34); Rotating a drive shaft (38) disposed in the machine body (1); Two arc-shaped toothed plates (39) are fixedly connected to the driving shaft (38), and the two arc-shaped toothed plates (39) are respectively meshed with the two transmission gears (37) for transmission. After the driving shaft (38) rotates, the two arc-shaped toothed plates (39) drive the two transmission gears (37) to rotate synchronously in the opposite direction.

2. The die-casting machine for automobile parts according to claim 1, characterized in that: The drive shaft (38) is coaxial with the turntable (21), and the drive shaft (38) passes through the inside of the turntable (21).

3. The die-casting machine for automobile parts according to claim 2, characterized in that: The arc-shaped tooth plate (39) and the lower die assembly are staggered in distribution, and the arc-shaped tooth plate (39) and the transmission gear (37) are located in the same vertical plane.

4. The die-casting machine for automobile parts according to claim 3, characterized in that: The pushing mechanism (2) further comprises: A slip ring (23) slidably arranged on the drive shaft (38); An assembly ring (231) provided on the slip ring (23) at a side close to the rotating disk (21); An assembly groove (211) corresponding to the assembly ring (231) is provided on the rotating disk (21); during the rotation of the driving shaft (38), after the slip ring (23) moves and the assembly ring (231) is inserted into the assembly groove (211), the driving shaft (38) drives the rotating disk (21) to rotate through the cooperation between the assembly ring (231) and the assembly groove (211).

5. The die-casting machine for automobile parts according to claim 4, characterized in that: The pushing mechanism (2) further comprises: a return spring (24) for pushing the slip ring (23) away from the rotating disk (21), wherein two ends of the return spring (24) are respectively connected to the slip ring (23) and the drive shaft (38); A protrusion (232) is provided on the side of the slip ring (23) away from the rotating disk (21), and a side wall of the protrusion (232) is provided with a slope; A vertical plate (25) is fixedly connected to the workbench (100). During the rotation of the slip ring (23), after the protrusion (232) contacts the vertical plate (25), the vertical plate (25) drives the slip ring (23) to approach the turntable (21) by pushing the protrusion (232).

6. The die-casting machine for automobile parts according to claim 5, characterized in that: The pushing mechanism (2) further comprises: A first rack (26) fixedly connected to the lower template (400); A second rack (27) fixedly connected to the push plate (22); A first arc-shaped tooth segment (28) and a second arc-shaped tooth segment (29) are provided on the slip ring (23), and the first arc-shaped tooth segment (28) and the second arc-shaped tooth segment (29) are meshingly connected with the first rack (26) and the second rack (27) respectively.

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