Die-casting forming equipment for copper metal products

Abstract

The invention discloses copper metal product die-casting forming equipment, which relates to the technical field of copper product die-casting, and comprises a movable die, a fixed die and an ejection mechanism, the ejection mechanism comprises an ejection rod, a driving unit and an air blowing unit; a plurality of ejector rods are arranged in a circumferential array relative to the movable mold cavity; the ejector rod is connected with the movable mold in a sliding manner; the ejector rod is used for ejecting a bearing retainer casting, and the action point is a beam of the bearing retainer; the driving unit is used for driving the ejector rod to move; the air blowing unit is arranged at the end, close to the movable mold, of the ejector rod and can blow air into the movable mold cavity, and separation of the bearing retainer pocket and the movable mold cavity is facilitated; according to the invention, the strain and deformation of the pocket can be reduced, and the yield of the retainer is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of copper product die-casting, and particularly to a die-casting forming device for copper metal products. Background Art

[0002] Copper alloy solid cages are usually produced by die-casting process; as Figure 1 shown, the wall thickness of the pocket area y of the cage is thinner than that of the beam area connecting the pockets y; the thinner pocket area can reduce friction and ensure flexible rolling of the balls, while the thicker beam area can provide structural strength to resist deformation and fracture; due to the complex structure and thin wall thickness of the pocket area of the cage, the molten metal in the pocket area cools and solidifies faster and shrinks earlier, which causes the metal in the pocket area to tightly wrap around the mold cavity when shrinking, increasing the resistance during demolding, and easily causing pocket deformation when applying ejection force to the pocket area; therefore, in the die-casting mold of the cage, the ejection mechanism usually acts on the beam area with a thicker wall thickness. When the ejection mechanism applies an ejection force to the beam area, it is easy to cause scratches on the pockets, increasing the defective rate of the cages. Summary of the Invention

[0003] The purpose of the present invention is to provide a die-casting forming device for copper metal products to solve the problems proposed in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A die-casting forming device for copper metal products, including a moving mold, a fixed mold and an ejection mechanism; the ejection mechanism includes ejector rods, a driving unit and a blowing unit; the ejector rods are arranged in a circumferential array with respect to the cavity of the moving mold; the ejector rods are slidably connected to the moving mold; the ejector rods are used for ejecting the bearing cage castings, and the acting point is the beam of the bearing cage; the driving unit is used to drive the ejector rods to move; the blowing unit is arranged at one end of the ejector rod close to the moving mold and can blow air into the cavity of the moving mold, which helps the pockets of the bearing cage to disengage from the cavity of the moving mold.

[0005] As a further solution of the present invention, the blowing unit includes an air outlet pipe, a tee joint and an air inlet pipe; the air outlet pipes are arranged in two symmetrically; the tee joint is used to connect the two air outlet pipes and the air inlet pipe; the air inlet pipe is arranged inside the ejector rod and extends to the outside of the ejector rod at one end far from the tee joint.

[0006] As a further solution of the present invention, the air outlet pipe is set as a flexible pipe.

[0007] As a further solution of the present invention, a fixing block is fixedly connected to one end of the air outlet pipe far from the tee joint, a slider one is rotatably connected to the fixing block, and the slider one is slidably connected to the ejector rod; a torsion spring for its reset is sleeved on the rotating shaft of the fixing block; a driving part for driving the slider one to move is arranged inside the ejector rod.

[0008] As a further solution of the present invention, the driving part includes a sliding column, and the sliding column is elastically and slidably connected to the ejector rod; two symmetrically arranged connecting rods I are hinged to one side of the sliding column close to the slider I, and the two ends of the two connecting rods I away from the sliding column are respectively connected to the two sliders I; a towing rope is fixedly connected to the sliding column, and one end of the towing rope away from the sliding column passes through the inner wall of the ejector rod and is fixedly connected to a slider II; the slider II is slidably connected to the ejector rod; the slider II is hinged to a connecting rod II, one end of the connecting rod II away from the slider II is hinged to a connecting rod III, and one end of the connecting rod III away from the connecting rod II is rotatably connected to the ejector rod.

[0009] As a further solution of the present invention, a sliding rod is elastically and slidably connected to the inner side of the slider I, and one end of the connecting rod I away from the sliding column is hinged to the sliding rod; a plug rod is fixedly connected to the sliding rod, and a jack capable of being inserted with the plug rod is opened on the fixed block.

[0010] As a further solution of the present invention, a sealing ring is installed at the top end of the ejector rod.

[0011] As a further solution of the present invention, the driving unit includes a sliding plate and a cylinder; the sliding plate is used for fixedly connecting a plurality of ejector rods; the cylinder is used for driving the sliding plate to move horizontally.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the arrangement of the air blowing unit, the air blowing unit can blow high-pressure gas into the cavity for pocket forming in the moving mold, break the adsorption force of the cage pocket area on the moving mold, help the pocket area to separate from the moving mold cavity, reduce pocket strain and deformation, and improve the yield rate of the cage. Description of the Drawings

[0013] Figure 1 It is a structural diagram of a bearing cage; Figure 2 It is a general structural schematic diagram of the present invention; Figure 3 It is a right view schematic diagram of the installation position of the ejector rod on the moving mold of the present invention; Figure 4 It is a sectional schematic diagram of the ejector rod structure of the present invention; Figure 5 For Figure 4 The partial enlarged view at A in Figure 6 It is a schematic diagram of the structure of the fixed block, slider I and torsion spring of the present invention; Figure 7 It is a sectional schematic diagram of the plug rod and the jack structure of the present invention; Figure 8 It is a schematic diagram of the working state of the plug rod and the jack of the present invention; Figure 9Schematic diagram of the first working state of the air outlet pipe of the present invention; Figure 10 is Figure 9 partial enlarged view at position B in Figure 11 Schematic diagram of the second working state of the air outlet pipe of the present invention; Figure 12 is Figure 11 partial enlarged view at position C in

[0014] The reference numerals are as follows: 1 - moving die, 2 - fixed die, 3 - ejector rod, 4 - air outlet pipe, 5 - tee, 6 - inlet pipe, 7 - fixing block, 8 - slider one, 9 - sliding column, 10 - connecting rod one, 11 - sliding rod, 12 - towing rope, 13 - slider two, 14 - connecting rod two, 15 - connecting rod three, 16 - torsion spring, 17 - inserting rod, 18 - inserting hole, 19 - sliding plate, 20 - air cylinder. Detailed implementation manners

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0016] Please refer to Figures 1 - 12 , in the attached drawings, x represents the cage beam area, y represents the cage pocket area, z represents the pocket forming area in the inner cavity of the moving die 1, and p represents the beam forming area in the inner cavity of the moving die 1; the present invention provides a technical solution: a die-casting forming device for copper metal products, including a moving die 1, a fixed die 2 and an ejection mechanism; the ejection mechanism includes an ejector rod 3, a driving unit and a blowing unit; the ejector rod 3 is arranged as a plurality of circumferentially arrayed about the cavity of the moving die 1; the ejector rod 3 is slidably connected to the moving die 1; the ejector rod 3 is used for the ejection work of the bearing cage casting, and the acting point is the beam of the bearing cage; the driving unit is used to drive the ejector rod 3 to move; the blowing unit is arranged at one end of the ejector rod 3 close to the moving die 1 and can blow air into the cavity of the moving die 1, which helps the pocket of the bearing cage to disengage from the cavity of the moving die 1.

[0017] Refer to Figure 1, after the moving mold 1 and the stationary mold 2 are clamped, the molten metal is injected into the cavities of the moving mold 1 and the stationary mold 2 from the gating system on the side of the stationary mold 2; the gating system on the side of the stationary mold 2, the injection process of the molten metal, and the pressure holding process of the mold are all mature existing technologies and will not be elaborated here, nor are they shown in the figure; after the copper alloy cage is cooled and formed, while the moving mold 1 moves to the left to open the mold, the ejection mechanism starts to work; the driving unit drives the ejector rod 3 to move to the right, and the ejector rod 3 acts on the upper beam area of the cage; after the ejector rod 3 moves a short distance to the right, the blowing unit inside the ejector rod 3 moves into the cavity area of the moving mold 1; the blowing unit blows high-pressure gas towards the cavity in the moving mold 1 for forming the pocket holes, breaking the adsorption force of the cage pocket hole area on the moving mold 1, helping the pocket hole area to disengage from the cavity of the moving mold 1, reducing pocket hole scratches and deformation, and improving the yield rate of the cage.

[0018] Specifically, as Figure 4 and Figure 5 shown, the blowing unit includes an air outlet pipe 4, a tee 5, and an air inlet pipe 6; the air outlet pipes 4 are arranged in two symmetrically; the tee 5 is used to connect the two air outlet pipes 4 and the air inlet pipe 6; the air inlet pipe 6 is arranged inside the ejector rod 3 and the end far from the tee 5 extends to the outside of the ejector rod 3.

[0019] Referring to Figure 2 , Figure 9 and Figure 10 , after the driving unit drives the ejector rod 3 to move a short distance to the right, the air outlet pipe 4 moves to the inside of the beam forming area p of the inner cavity of the moving mold 1; since at this time, although the beam area x of the cage casting has moved a short distance to the outside (right side) but has not completely disengaged from the beam forming area p of the inner cavity of the moving mold 1; therefore, under the action of the cage casting, the cavity of the moving mold 1 (especially the channel between the beam forming area P and the pocket hole forming area) is still in a relatively closed state; the compressor (not shown in the figure) injects high-pressure air from the air inlet pipe 6 through the tee 5 into the air outlet pipe 4, and the high-pressure air is discharged from the port of the air outlet pipe 4, enters the pocket hole forming area of the inner cavity of the moving mold 1 through the beam forming area p of the inner cavity of the moving mold 1, and blows towards the innermost side of the cage pocket hole area y. Under the action of the air flow, the adsorption force of the cage pocket hole area y on the moving mold 1 is greatly reduced, helping the cage pocket hole area to disengage from the cavity of the moving mold 1 and reducing pocket hole scratches and deformation; after the cage is disengaged from the moving mold 1, the high-pressure air flow can also blow out the debris such as flash and burrs remaining in the cavity of the moving mold 1, helping to keep the mold clean.

[0020] Specifically, as Figures 4 - 8 , Figure 11 and Figure 12 shown, the air outlet pipe 4 is set as a flexible pipe; the end of the air outlet pipe 4 far from the tee 5 is fixedly connected with a fixing block 7, the fixing block 7 is rotatably connected with a slider 8, and the slider 8 is slidably connected with the ejector rod 3; a torsion spring 16 for its reset is sleeved on the rotating shaft of the fixing block 7; a driving part for driving the slider 8 to move is arranged inside the ejector rod 3.

[0021] Considering that the hardness of the copper cage is relatively low, during the process of separating and contacting the ejector rod 3 after leaving the cavity of the moving die 1, the friction generated between the two is likely to cause scratches on the cage; to solve the above problems, in this embodiment, the air outlet pipe 4 is set as a flexible pipe, enabling it to be easily twisted and deformed; in Figure 6 and Figure 7 the state shown, the torsion spring 16 is in a torsion energy storage state (pre-tightening state). At this time, the fixed block 7 is located in the chute inside the ejector rod 3. Under the limiting effect of the chute, the fixed block 7 cannot rotate, so the torsion spring 16 maintains its torsion state; in Figure 8 the state shown, after the fixed block 7 moves out to the outside of the ejector rod 3, the fixed block 7 rotates under the elastic force of the torsion spring 16, and the torsion spring 16 releases energy and returns to the relaxed state accordingly; after the cage pocket area is separated from the cavity of the moving die 1 under the action of the air flow, the ejector rod 3 continues to move to the right to eject the cage; at this time, the driving part drives the two first sliders 8 to move away from each other, and the first slider 8 drives the fixed block 7 to move to the outside of the ejector rod 3; after the fixed block 7 moves out to the outside of the ejector rod 3, the elastic force of the torsion spring 16 drives the fixed block 7 to flip by a certain angle, reaching the state shown in Figure 11 and Figure 12 ; the air outlet pipe 4 flips synchronously with the fixed block 7. At this time, the high-pressure gas blown out from the outer end of the air outlet pipe 4 provides a thrust to the outside (right side) for the cage casting, causing the cage to have a tendency to separate from the contact with the ejector rod 3. When the cage then moves out of the cavity of the moving die 1 and drops downward, under the action of this thrust, the friction force between the ejector rod 3 and the cage is greatly reduced, and the probability of the ejector rod 3 scratching the cage is also greatly reduced.

[0022] Specifically, as shown in Figure 4 and Figure 5 , the driving part includes a sliding column 9, and the sliding column 9 is elastically and slidably connected to the ejector rod 3; the sliding direction of the sliding column 9 is along the axial direction of the ejector rod 3; two symmetrically arranged first connecting rods 10 are hinged to one side of the sliding column 9 close to the first slider 8, and the two ends of the two first connecting rods 10 away from the sliding column 9 are respectively connected to the two first sliders 8; a traction rope 12 is fixedly connected to the sliding column 9, and the end of the traction rope 12 away from the sliding column 9 passes through the inner wall of the ejector rod 3 and is fixedly connected to a second slider 13; the second slider 13 is slidably connected to the ejector rod 3; the sliding direction of the second slider 13 is along the axial direction of the ejector rod 3; the second slider 13 is hinged to a second connecting rod 14, and the end of the second connecting rod 14 away from the second slider 13 is hinged to a third connecting rod 15, and the end of the third connecting rod 15 away from the second connecting rod 14 is rotatably connected to the ejector rod 3.

[0023] Refer to Figure 4, when the ejector rod 3 moves to the right, it drives the fixed block 7, the first slider 8, the third connecting rod 15 and the second connecting rod 14 to move synchronously. When the fixed block 7 moves into the cavity of the moving mold 1, the third connecting rod 15 moves to contact the outer wall of the moving mold 1; the ejector rod 3 continues to move, and the third connecting rod 15 rotates around its hinge point in the direction v1 under the action of the outer wall of the moving mold 1. The third connecting rod 15 drives the second slider 13 to move in the direction v2 through the second connecting rod 14; refer to Figure 5 , the second slider 13 drives the sliding column 9 to move towards the first slider 8 through the traction rope 12. The sliding column 9 drives the first slider 8 to move outward of the ejector rod 3 through the first connecting rod 10, and the first slider 8 drives the fixed block 7 to move outward synchronously; when the third connecting rod 15 is received inside the ejector rod 3, the fixed block 7 has moved out to the outside of the ejector rod 3 and rotates. At this time, the position of the third connecting rod 15 is fixed, and the fixed block 7 can also maintain a stable state.

[0024] Specifically, as Figure 7 and Figure 8 shown, a sliding rod 11 is elastically and slidably connected to the inside of the first slider 8, and one end of the first connecting rod 10 away from the sliding column 9 is hinged to the sliding rod 11; a plug rod 17 is fixedly connected to the sliding rod 11, and a jack 18 capable of being inserted with the plug rod 17 is provided on the fixed block 7.

[0025] When the sliding column 9 moves towards the first slider 8, the first connecting rod 10 drives the sliding rod 11 to move outward; a spring for its reset is connected to one side of the sliding rod 11; at this time, the sliding rod 11 drives the first slider 8 and the fixed block 7 to move outward synchronously through the spring. When the fixed block 7 moves out to the outside of the ejector rod 3, the fixed block 7 rotates to Figure 8 the state shown, and the first slider 8 moves to the farthest position outward. At this time, the first slider 8 no longer moves outward; refer to Figure 8 , when the sliding column 9 continues to move upward, the first connecting rod 10 drives the sliding rod 11 to move towards the inside of the first slider 8, and the sliding rod 11 drives the plug rod 17 to insert into the jack 18. The plug rod 17 cooperates with the jack 18 to limit the fixed block 7, avoiding the shaking of the fixed block 7 under the action of the air flow, and the air outlet pipe 4 stably provides a thrust to the cage.

[0026] Specifically, a sealing ring is installed at the top of the ejector rod 3; the sealing ring is used to seal the gap between the ejector rod 3 and the moving mold 1 due to machining errors, and the sealing ring is heat-resistant; through the setting of the sealing ring, the leakage of molten metal is reduced.

[0027] Specifically, as Figure 2 shown, the driving unit includes a sliding plate 19 and a cylinder 20; the sliding plate 19 is used to fixedly connect a plurality of ejector rods 3; the cylinder 20 is used to drive the sliding plate 19 to move horizontally; through the expansion and contraction of the cylinder 20, the sliding plate 19 can be driven to drive the ejector rod 3 to move left and right.

[0028] As mentioned above, the elastic sliding connection (installation) refers to a structure in which a part can automatically reset after sliding, including the spring structure shown in the figure, but not limited to the spring structure.

[0029] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A die-casting forming device for copper metal products, comprising a movable mold (1), a fixed mold (2) and an ejection mechanism; characterized in that: The ejection mechanism includes ejector rods (3), a driving unit, and a blowing unit; the ejector rods (3) are arranged in a circumferential array with respect to the cavity of the moving mold (1); the ejector rods (3) are slidably connected to the moving mold (1); the ejector rods (3) are used for ejecting the bearing cage casting, and the acting point is the beam of the bearing cage; the driving unit is used to drive the ejector rods (3) to move; the blowing unit is arranged at one end of the ejector rod (3) close to the moving mold (1) and can blow air into the cavity of the moving mold (1), which helps the pockets of the bearing cage to disengage from the cavity of the moving mold (1).

2. A die-casting forming device for a copper metal product according to claim 1, characterized in that: The blowing unit includes an air outlet pipe (4), a tee joint (5), and an air inlet pipe (6); the air outlet pipes (4) are arranged in two symmetrically; the tee joint (5) is used to connect the two air outlet pipes (4) and the air inlet pipe (6); the air inlet pipe (6) is arranged inside the ejector rod (3), and one end far from the tee joint (5) extends to the outside of the ejector rod (3).

3. A die-casting forming device for copper metal products according to claim 2, characterized in that: The air outlet pipe (4) is arranged as a flexible pipe.

4. A die-casting forming device for copper metal products according to claim 3, characterized in that: One end of the air outlet pipe (4) far from the tee joint (5) is fixedly connected with a fixed block (7), the fixed block (7) is rotatably connected with a first slider (8), and the first slider (8) is slidably connected with the ejector rod (3); a torsion spring (16) for resetting is sleeved on the rotating shaft of the fixed block (7); a driving part for driving the first slider (8) to move is arranged inside the ejector rod (3).

5. A die-casting forming device for copper metal products according to claim 4, characterized in that: The driving part includes a sliding column (9), the sliding column (9) is elastically slidably connected with the ejector rod (3); two symmetrically arranged first connecting rods (10) are hinged to one side of the sliding column (9) close to the first slider (8), and one ends of the two first connecting rods (10) far from the sliding column (9) are respectively connected with the two first sliders (8); a traction rope (12) is fixedly connected to the sliding column (9), one end of the traction rope (12) far from the sliding column (9) passes through the inner wall of the ejector rod (3) and is fixedly connected with a second slider (13); the second slider (13) is slidably connected with the ejector rod (3); the second slider (13) is hinged to a second connecting rod (14), one end of the second connecting rod (14) far from the second slider (13) is hinged to a third connecting rod (15), and one end of the third connecting rod (15) far from the second connecting rod (14) is rotatably connected with the ejector rod (3).

6. A die-casting forming device for copper metal products according to claim 5, characterized in that: A sliding rod (11) is elastically slidably connected to the inside of the first slider (8), and one end of the first connecting rod (10) far from the sliding column (9) is hinged to the sliding rod (11); a plug rod (17) is fixedly connected to the sliding rod (11), and a jack (18) capable of being inserted with the plug rod (17) is opened on the fixed block (7).

7. A die-casting forming device for copper metal products according to claim 5, characterized in that: A sealing ring is installed at the top end of the ejector rod (3).

8. A die-casting forming device for a copper metal product according to claim 1, characterized in that: The driving unit includes a slide plate (19) and a cylinder (20); the slide plate (19) is used to fixedly connect a plurality of ejector rods (3); the cylinder (20) is used to drive the slide plate (19) to move horizontally.

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