Progressive mold for preparing pressed powder box

Abstract

The invention relates to the technical field of pressed powder box production, in particular to a progressive die for pressed powder box preparation, which comprises an upper die and a lower die, a conveying channel is arranged at the top of the lower mold; the lower die is provided with a feeding groove at the conveying channel; the feeding groove is provided with a feeding device; the feeding device comprises a mounting base fixedly arranged on the feeding groove, a lifting base movably arranged on the mounting base in a lifting mode and a rotating base rotationally arranged on the lifting base. The lifting seat is designed to be of a lifting movable structure, and the rotating seat and the shifting block on the positioning block are driven to synchronously achieve height adjustment; the contact height of the shifting block and the material belt conveying trough can be changed before feeding each time, so that the contact positions of the shifting block are distributed in a dispersed mode, the situation that a single position bears concentrated stress and friction for a long time is avoided, the abrasion, deformation and corner chipping risks of the shifting block are effectively relieved, and the service life of the shifting block is effectively prolonged.

Description

Technical Field

[0001] This invention relates to the field of powder compact manufacturing technology, and more specifically to a progressive die for the preparation of powder compacts. Background Technology

[0002] In the mass production of compact powder cases, progressive dies have become one of the core pieces of equipment in the forming and processing of compact powder cases due to their advantages of continuous stamping and high production efficiency. Stable conveying of the feed strip is a key aspect of the normal operation of progressive dies, and its conveying accuracy directly affects the forming quality, dimensional consistency, and production continuity of the compact powder cases.

[0003] Currently, the conveyor mechanism of progressive dies used in the production of traditional powder compacts commonly employs a transmission method where a toggle block engages with a conveyor groove on the edge of the conveyor belt. The specific working process is as follows: the toggle block is connected to the power output end of the die, achieving periodic rotation through intermittent drive of the die. During rotation, one end of the toggle block engages in the conveyor groove of the conveyor belt, using friction or mechanical clamping force to move the conveyor belt forward in a set direction, completing a single feeding action. Subsequently, the toggle block resets with the power mechanism, preparing for the next feeding.

[0004] However, existing actuating blocks are typically fixed structures with non-adjustable installation height and contact position, meaning they cannot achieve lifting or lowering. This structural defect results in the contact point between the actuating block and the conveyor trough remaining fixed in the same position during each conveyor belt transfer. Due to unavoidable minor vibrations during conveyor belt transfer, machining errors in the conveyor trough, and slight wear after long-term use, the fixed contact point of the actuating block continuously experiences concentrated stress and friction. On the one hand, concentrated friction causes the wear rate at this contact point to be much higher than in other areas, gradually leading to deformation, wear, and even chipping at the contact end of the actuating block. On the other hand, long-term concentrated stress can cause fatigue damage to the actuating block material, further exacerbating its risk of failure.

[0005] When the actuating block is damaged, its engagement precision with the conveyor chute decreases significantly, easily leading to problems such as conveyor belt misalignment, jamming, insufficient or excessive feeding. This not only causes quality issues like dimensional deviations and edge defects in the powder box molded parts, but may also cause mold jamming and machine downtime for maintenance. Furthermore, frequent replacement of damaged actuating blocks increases production consumable costs, while downtime for maintenance interrupts the production process, severely impacting production efficiency and causing unnecessary economic losses for the company. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned shortcomings in the prior art by providing a progressive mold for the preparation of powder compacts.

[0007] The objective of this invention is achieved through the following technical solution: a progressive mold for preparing powder compacts, comprising an upper mold and a lower mold; the top of the lower mold is provided with a conveying channel; the lower mold is provided with a feeding trough at the conveying channel; the feeding trough is provided with a feeding device; The feeding device includes a mounting base fixedly mounted on the feeding trough, a lifting seat movably mounted on the mounting base, and a rotating seat rotatably mounted on the lifting seat. The lifting seat includes a lifting part and a pushing part located at the top of the lifting part; the rotating seat has a rotating cavity in the middle; the rotating cavity is rotatably sleeved outside the pushing part; the outer wall of the rotating seat has a plurality of positioning blocks; a toggle block is movably disposed inside the positioning block; one end of the toggle block is movably disposed in the positioning block; the other end of the toggle block is movably disposed in the rotating cavity; the outer wall of the pushing part has a pushing protrusion for abutting against the other end of the toggle block.

[0008] The present invention is further configured such that the feeding device includes a limiting seat; the limiting seat is rotatably mounted on the mounting base; the limiting seat has a limiting cavity; the limiting cavity is rotatably sleeved outside the lifting part; the outer wall of the lifting part is provided with a limiting pin; the inner wall of the limiting cavity is provided with a limiting groove; the limiting pin is movably mounted in the limiting groove; and a limiting spring is provided between the outer wall of the lifting part and the limiting pin.

[0009] The present invention is further configured such that the limiting groove includes a plurality of limiting vertical grooves arranged circumferentially along the inner wall of the limiting cavity and a limiting spiral groove disposed between two adjacent limiting vertical grooves; the bottom of the limiting vertical groove is connected to the bottom of an adjacent limiting spiral groove, the top of the limiting vertical groove is connected to the top of another adjacent limiting spiral groove, the depth of the top of the limiting vertical groove is greater than the depth of the top of the other adjacent limiting spiral groove, and the depth of the bottom of the limiting vertical groove is the same as the depth of the bottom of the adjacent limiting spiral groove; The height of each limiting vertical groove is different.

[0010] The present invention is further configured such that a reset spring is provided between the lifting part and the limiting cavity.

[0011] The present invention is further configured such that the feeding device includes a linkage seat rotatably disposed at the bottom of the mounting base; the linkage seat is provided with a guide column; the rotating seat is provided with a guide rod; and the guide rod is movably and vertically disposed on the guide column.

[0012] The invention is further configured such that the mounting base is rotatably provided with a one-way gear; the linkage seat is provided with a pawl that cooperates with the one-way gear; and a coil spring is provided between the one-way gear and the mounting base.

[0013] The present invention is further configured such that the one-way gear is fixedly connected to a connecting column; the connecting column is rotatably disposed within the mounting base; a driving seat is rotatably disposed on the top of the mounting base; and the driving seat is fixedly connected to the connecting column. The drive base has a drive cavity; the inner wall of the drive cavity has a drive groove; the bottom of the upper mold has a drive rod; the drive rod has a drive pin; the drive pin is movably disposed in the drive groove.

[0014] The present invention is further configured such that the driving groove includes a driving vertical entry groove, a driving vertical exit groove, and a driving spiral groove; the top of the driving spiral groove is connected to the bottom of the driving vertical entry groove; and the bottom of the driving spiral groove is connected to the bottom of the driving vertical exit groove.

[0015] The present invention is further configured such that a driving channel is provided in the middle of the pushing part; and the driving seat is provided at the bottom of the driving channel.

[0016] The present invention is further configured such that the outer wall of the rotating seat is provided with an anti-rotation surface; and the bottom of the upper mold is provided with an anti-rotation arm that abuts against the anti-rotation surface.

[0017] The beneficial effects of the present invention are as follows: The present invention designs the lifting seat as a movable structure that can be raised and lowered, so that the rotating seat and the actuating block on the positioning block can be adjusted in height simultaneously; before each feeding, the contact height between the actuating block and the material conveyor trough can be changed, so that the contact position of the actuating block is distributed in a dispersed manner, avoiding the long-term concentrated stress and friction of a single position, effectively reducing the risk of wear, deformation and chipping of the actuating block, and effectively extending its service life. Attached Figure Description

[0018] The invention will be further illustrated with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the invention. For those skilled in the art, other drawings can be obtained based on the following drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 yes Figure 2 A magnified view of part A in the middle; Figure 4 This is a schematic diagram of the structure of the mold of the present invention; Figure 5 This is a schematic diagram of the structure of the mold of the present invention; Figure 6 This is a schematic diagram of the feeding device of the present invention; Figure 7 This is a cross-sectional view of the feeding device of the present invention; Figure 8 This is a perspective view of the drive unit of the present invention; Figure 9 This is a perspective view of the limiting seat of the present invention; Figure 10 This is a schematic diagram of the structure of the linkage seat, one-way gear and drive seat of the present invention. The components are: 1. Material strip; 11. Material conveyor trough; 2. Upper mold; 21. Drive rod; 22. Drive pin; 23. Anti-rotation arm; 3. Lower mold; 31. Conveying channel; 32. Feed trough; 4. Mounting base; 41. One-way gear; 42. Coil spring; 43. Connecting column; 5. Lifting base; 51. Lifting part; 52. Limit pin; 53. Limit spring; 54. Pushing part; 55. Pushing protrusion; 56. Drive channel; 6. Rotating seat; 61. Rotating cavity; 62. Positioning block; 63. Actuating block; 64. Guide rod; 65. Anti-rotation surface; 7. Limiting seat; 71. Limiting cavity; 72. Limiting vertical groove; 73. Limiting spiral groove; 74. Return spring; 8. Linkage seat; 81. Guide post; 82. Pawl; 9. Drive seat; 91. Drive cavity; 92. Driveing ​​vertical entry groove; 93. Driveing ​​vertical exit groove; 94. Driveing ​​spiral groove. Detailed Implementation

[0020] The present invention will be further described in conjunction with the following embodiments.

[0021] Depend on Figures 1 to 9 As can be seen, the progressive mold for preparing a powder compact box described in this embodiment includes an upper mold 2 and a lower mold 3; the top of the lower mold 3 is provided with a conveying channel 31; the lower mold 3 is provided with a feeding trough 32 at the conveying channel 31; the feeding trough 32 is provided with a feeding device; The feeding device includes a mounting base 4 fixedly mounted on the feeding trough 32, a lifting seat 5 movably mounted on the mounting base 4, and a rotating seat 6 rotatably mounted on the lifting seat 5. The lifting seat 5 includes a lifting part 51 and a pushing part 54 disposed on the top of the lifting part 51; the rotating seat 6 has a rotating cavity 61 in the middle; the rotating cavity 61 is rotatably sleeved outside the pushing part 54; the outer wall of the rotating seat 6 is provided with a plurality of positioning blocks 62; a toggle block 63 is movably disposed inside the positioning block 62; one end of the toggle block 63 is movably disposed in the positioning block 62; the other end of the toggle block 63 is movably disposed in the rotating cavity 61; the outer wall of the pushing part 54 is provided with a pushing protrusion 55 for abutting against the other end of the toggle block 63.

[0022] Specifically, in the progressive mold for preparing powder compact boxes described in this embodiment, when in use, the material strip 1 is first placed in the conveying channel 31 of the lower mold 3. When it is necessary to drive the material strip 1 to move one station, the rotating seat 6 is rotated by a predetermined angle. During the rotation of the rotating seat 6, when the actuating block 63 passes the pushing protrusion 55, the pushing protrusion 55 pushes the actuating block 63 to extend outward toward the positioning block 62, so that the actuating block 63 is engaged in the conveying groove 11 of the material strip 1, and the material strip 1 is moved to the station as the rotating seat 6 rotates.

[0023] In this embodiment, by setting up a lifting seat 5, which is movably mounted on the mounting seat 4, and the rotating seat 6 also moves up and down with the lifting seat 5, the actuating block 63 can change its height position. Thus, the actuating block 63 can contact the material conveying trough 11 of the material belt 1 at different height positions, avoiding the same position of the actuating block 63 contacting the material conveying trough 11 of the material belt 1, and effectively increasing the service life of the actuating block 63.

[0024] The progressive mold for preparing powder compact boxes described in this embodiment includes a feeding device that further includes a limiting seat 7; the limiting seat 7 is rotatably mounted on the mounting base 4; the limiting seat 7 has a limiting cavity 71; the limiting cavity 71 is rotatably sleeved on the lifting part 51; the outer wall of the lifting part 51 is provided with a limiting pin 52; the inner wall of the limiting cavity 71 is provided with a limiting groove; the limiting pin 52 is movably mounted in the limiting groove; and a limiting spring 53 is provided between the outer wall of the lifting part 51 and the limiting pin 52.

[0025] Specifically, this embodiment can limit the height position of the lifting seat 5, the height position of the rotating seat 6, and the height position of the toggle block 63 through the above settings.

[0026] This embodiment describes a progressive mold for manufacturing powder compacts. The limiting groove includes multiple vertical limiting grooves 72 arranged circumferentially along the inner wall of a limiting cavity 71, and a limiting spiral groove 73 located between adjacent vertical limiting grooves 72. The bottom of each vertical limiting groove 72 communicates with the bottom of an adjacent spiral limiting groove 73, and the top of each vertical limiting groove 72 communicates with the top of an adjacent spiral limiting groove 73. The depth of the top of each vertical limiting groove 72 is greater than the depth of the top of the adjacent spiral limiting groove 73, and the depth of the bottom of each vertical limiting groove 72 is the same as the depth of the bottom of the adjacent spiral limiting groove 73. The height of each vertical limiting groove 72 is different. In this embodiment, a return spring 74 is provided between the lifting part 51 and the limiting cavity 71.

[0027] Specifically, in the progressive mold for preparing powder compacts described in this embodiment, when idle, under the action of the return spring 74, the limiting pin 52 is locked at the top of one of the limiting vertical grooves 72. At this time, the height position of the lifting seat 5, the height position of the rotating seat 6, and the height of the toggle block 63 are determined by the position of the top of the limiting vertical groove 72.

[0028] When it is necessary to change the height position of the toggle block 63, the lifting seat 5 is pressed down. During the downward movement of the lifting seat 5, the limiting pin 52 first moves down along the limiting vertical groove 72, and then moves to the bottom of the adjacent limiting vertical groove 72 through the limiting spiral groove 73. Then the lifting seat 5 is released, and under the action of the return spring 74, the limiting pin 52 is stuck at the top of the limiting vertical groove 72. At this time, the height position of the lifting seat 5, the height position of the rotating seat 6, and the height of the toggle block 63 are determined by the position of the top of the limiting vertical groove 72.

[0029] Since the height of each limiting vertical groove 72 is different, the height position of the lifting seat 5, the height position of the rotating seat 6, and the height of the toggle block 63 in the idle state can be changed by pressing the lifting seat 5 each time.

[0030] This embodiment describes a progressive die for preparing powder compacts. The feeding device further includes a linkage seat 8 rotatably mounted at the bottom of the mounting base 4; the linkage seat 8 is provided with a guide post 81; the rotating base 6 is provided with a guide rod 64; the guide rod 64 is movably mounted on the guide post 81. Through the above-described configuration of the rotating base 6 and the lifting base 5, stable lifting and lowering movements are achieved.

[0031] This embodiment describes a progressive die for preparing a powder compact. The mounting base 4 is rotatably equipped with a one-way gear 41; the linkage seat 8 is equipped with a pawl 82 that engages with the one-way gear 41; a coil spring 42 is provided between the one-way gear 41 and the mounting base 4. In this embodiment, the one-way gear 41 is fixedly connected to a connecting column 43; the connecting column 43 is rotatably disposed within the mounting base 4; a drive seat 9 is rotatably disposed on the top of the mounting base 4; the drive seat 9 is fixedly connected to the connecting column 43; a drive cavity 91 is provided within the drive seat 9; a drive groove is provided on the inner wall of the drive cavity 91; a drive rod 21 is provided at the bottom of the upper die 2; the drive rod 21 is equipped with a drive pin 22; the drive pin 22 is movably disposed within the drive groove. This embodiment describes a progressive die for making a powder compact. The driving groove includes a driving vertical entry groove 92, a driving vertical exit groove 93, and a driving spiral groove 94. The top of the driving spiral groove 94 communicates with the bottom of the driving vertical entry groove 92, and the bottom of the driving spiral groove 94 communicates with the bottom of the driving vertical exit groove 93. In this embodiment, the driving part 54 has a driving channel 56 in its middle; the driving seat 9 is located at the bottom of the driving channel 56. In this embodiment, the rotating seat 6 has an anti-rotation surface 65 on its outer wall; the bottom of the upper die 2 has an anti-rotation arm 23 that abuts against the anti-rotation surface 65.

[0032] Specifically, in the progressive mold for preparing powder compact boxes described in this embodiment, when in use, the material strip 1 is first placed in the conveying channel 31 of the lower mold 3. At this time, under the action of the return spring 74, the limiting pin 52 is stuck at the top of one of the limiting vertical grooves 72, and the driving pin 22 is aligned with the top of the driving vertical entry groove 92. When the mold is closed, the upper mold 2 descends. First, the anti-rotation arm 23 abuts against the anti-rotation surface 65 on the outer wall of the rotating seat 6 to prevent the rotating seat 6 from rotating. Then, the drive rod 21 enters the drive channel 56 until the top of the upper mold 2 abuts against the top of the rotating seat 6 and the top of the push part 54. Then, the upper mold 2 continues to descend, driving the rotating seat 6 and the lifting seat 5 to descend. During the descent of the lifting seat 5, the limiting pin 52 first moves downward along the limiting vertical groove 72. When the limiting pin 52 enters the limiting spiral groove 73, the limiting seat 7 begins to rotate. Then, the limiting pin 52 moves through the limiting spiral groove 73 to the bottom of the adjacent limiting vertical groove 72. During this process, since the height of the driving seat 9 remains unchanged, during the descent of the upper mold 2, the driving pin 22 enters the top of the driving vertical entry groove 92 and falls into the driving spiral groove 94. As the driving pin 22 moves along the driving spiral groove 94, it drives the driving seat 9 to rotate. The driving seat 9 drives the one-way gear 41 to rotate through the connecting column 43. The coil spring 42 gradually stores energy. However, due to the ratchet 82, the one-way gear 41 cannot drive the linkage seat 8 and the rotating seat 6 to rotate until the driving pin 22 moves through the driving spiral groove 94 to the bottom of the driving vertical exit groove 93.

[0033] After the mold is closed, it needs to be opened. During the mold opening process, the drive pin 22 exits from the top of the drive vertical exit groove 93 until the anti-rotation arm 23 separates from the anti-rotation surface 65. Under the action of the return spring 74, the limit pin 52 is stuck at the top of the adjacent limit vertical groove 72. At this time, the height position of the lifting seat 5, the height position of the rotating seat 6, and the height of the toggle block 63 are determined by the position of the top of the limit vertical groove 72. At the same time, under the action of the coil spring 42, the drive seat 9 rotates in the opposite direction to reset. During the rotation of the drive seat 9, the connecting column 43 drives the one-way gear 41 to rotate. The rotation of the one-way gear 41 drives the linkage seat 8 to rotate through the pawl 82. The linkage seat 8 drives the rotating seat 6 to rotate synchronously, thereby driving the material belt 1 to move one station through the toggle block 63.

[0034] This embodiment directly utilizes the reciprocating motion of mold closing and opening in conventional progressive die production as the sole power source, eliminating the need for additional dedicated drive components. During mold closing, the descent of the upper die 2, through the cooperation of the drive rod 21, drive pin 22, and drive groove, converts linear motion into rotational motion of the drive seat 9, thereby driving the one-way gear 41 to rotate and causing the coil spring 42 to complete energy storage. During mold opening, the ascent of the upper die 2 releases the limit of the anti-rotation arm 23 on the rotating seat 6, and the coil spring 42 releases its stored energy to drive the drive seat 9 to reverse reset. Then, through the linkage transmission of the one-way gear 41, pawl 82, and linkage seat 8, the rotating seat 6 is driven to rotate, realizing the feeding of the material strip 1. The entire power transmission process relies entirely on the working cycle of the die itself, saving the procurement, installation, and debugging costs of additional drive components. At the same time, it reduces the complexity of the pipelines and wiring connections of the drive system, making the overall die structure more compact and integrated, and reducing the equipment failure rate.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A progressive die for manufacturing powder compacts, characterized in that: It includes an upper mold (2) and a lower mold (3); the top of the lower mold (3) is provided with a conveying channel (31); the lower mold (3) is provided with a feeding trough (32) at the conveying channel (31); the feeding trough (32) is provided with a feeding device; The feeding device includes a mounting base (4) fixedly mounted on the feeding trough (32), a lifting seat (5) movably mounted on the mounting base (4), and a rotating seat (6) rotatably mounted on the lifting seat (5); The lifting seat (5) includes a lifting part (51) and a pushing part (54) located at the top of the lifting part (51); the rotating seat (6) has a rotating cavity (61) in the middle; the rotating cavity (61) is rotatably sleeved outside the pushing part (54); the outer wall of the rotating seat (6) is provided with a plurality of positioning blocks (62); a toggle block (63) is movably provided inside the positioning block (62); one end of the toggle block (63) is movably and telescopically located in the positioning block (62); the other end of the toggle block (63) is movably and telescopically located in the rotating cavity (61); the outer wall of the pushing part (54) is provided with a pushing protrusion (55) for abutting against the other end of the toggle block (63).

2. The progressive die for preparing a powder compact box according to claim 1, characterized in that: The feeding device also includes a limiting seat (7); the limiting seat (7) is rotatably mounted on the mounting base (4); the limiting seat (7) is provided with a limiting cavity (71); the limiting cavity (71) is rotatably sleeved outside the lifting part (51); the outer wall of the lifting part (51) is provided with a limiting pin (52) that can be extended and retracted; the inner wall of the limiting cavity (71) is provided with a limiting groove; the limiting pin (52) is movably mounted in the limiting groove; a limiting spring (53) is provided between the outer wall of the lifting part (51) and the limiting pin (52).

3. The progressive die for preparing a powder compact box according to claim 2, characterized in that: The limiting groove includes a plurality of limiting vertical grooves (72) arranged circumferentially along the inner wall of the limiting cavity (71) and a limiting spiral groove (73) disposed between two adjacent limiting vertical grooves (72); the bottom of the limiting vertical groove (72) is connected to the bottom of an adjacent limiting spiral groove (73), the top of the limiting vertical groove (72) is connected to the top of another adjacent limiting spiral groove (73), the depth of the top of the limiting vertical groove (72) is greater than the depth of the top of the other adjacent limiting spiral groove (73), and the depth of the bottom of the limiting vertical groove (72) is the same as the depth of the bottom of the adjacent limiting spiral groove (73); The height of each limiting vertical groove (72) is different.

4. A progressive die for preparing a powder compact box according to claim 3, characterized in that: A return spring (74) is provided between the lifting part (51) and the limiting cavity (71).

5. A progressive die for preparing a powder compact box according to claim 2, characterized in that: The feeding device also includes a linkage seat (8) rotatably disposed at the bottom of the mounting base (4); the linkage seat (8) is provided with a guide column (81); the rotating base (6) is provided with a guide rod (64); the guide rod (64) is movably disposed on the guide column (81).

6. A progressive die for preparing a powder compact box according to claim 5, characterized in that: The mounting base (4) is rotatably provided with a one-way gear (41); the linkage base (8) is provided with a pawl (82) that cooperates with the one-way gear (41); a coil spring (42) is provided between the one-way gear (41) and the mounting base (4).

7. A progressive die for preparing a powder compact box according to claim 6, characterized in that: The one-way gear (41) is fixedly connected to a connecting column (43); the connecting column (43) is rotatably disposed in the mounting base (4); the top of the mounting base (4) is rotatably provided with a drive seat (9); the drive seat (9) is fixedly connected to the connecting column (43); The drive seat (9) is provided with a drive cavity (91); the inner wall of the drive cavity (91) is provided with a drive groove; the bottom of the upper mold (2) is provided with a drive rod (21); the drive rod (21) is provided with a drive pin (22); the drive pin (22) is movably disposed in the drive groove.

8. A progressive die for preparing a powder compact box according to claim 7, characterized in that: The drive groove includes a drive vertical entry groove (92), a drive vertical exit groove (93), and a drive spiral groove (94); the top of the drive spiral groove (94) is connected to the bottom of the drive vertical entry groove (92); the bottom of the drive spiral groove (94) is connected to the bottom of the drive vertical exit groove (93).

9. A progressive die for preparing a powder compact box according to claim 8, characterized in that: The middle part of the push part (54) is provided with a drive channel (56); the drive seat (9) is located at the bottom of the drive channel (56).

10. A progressive die for preparing a powder compact box according to claim 8, characterized in that: The outer wall of the rotating seat (6) is provided with an anti-rotation surface (65); the bottom of the upper mold (2) is provided with an anti-rotation arm (23) that abuts against the anti-rotation surface (65).

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