A full-automatic forming press production line for magnetic materials

Abstract

The application relates to the technical field of material forming presses, in particular to a full-automatic magnetic material forming press production line, which comprises a forming press, a machine base and a die arranged on a machine table, a material feeding device and a material collecting structure are arranged on the machine base, the material collecting structure is located above the die, a walking table is slidably arranged on the machine table below the die, a material shaking mechanism is arranged between the die and the outside of the material collecting structure, and a sealing assembly matched with the material shaking mechanism is further arranged on the top side of the die. The full-automatic magnetic material forming press production line is characterized in that the loading process is accompanied by high-frequency slight knocking, the reciprocating shaft and the guide plate are matched, the effect of the reset spring I is combined, the bridging phenomenon among powder particles is effectively destroyed, the powder is uniformly and densely filled into each corner of the die cavity, air is discharged at the same time, the forming part is prevented from having defects such as cavities, agglomerates and uneven density, and the product qualified rate is greatly improved.

Description

Technical Field

[0001] This application relates to the field of material forming press technology, and in particular to a fully automatic forming press production line for magnetic materials. Background Technology

[0002] Magnetic materials such as ferrites and neodymium iron boron are widely used in motors, sensors, consumer electronics, and new energy vehicles. Their molding process typically involves pressing magnetic powder into blanks of a specific shape and density using a press, followed by sintering or curing to obtain the final product. The molding press production line is the core equipment in magnetic material production; its automation level in loading, feeding, pressing, and demolding directly affects product quality and production efficiency. Currently, conventional magnetic material molding press production lines mostly adopt the following process: magnetic powder is fed into a hopper by a conveying device, the hopper descends above the mold, and the powder falls into the mold cavity by gravity, then is directly stamped by the upper pressure head. However, this traditional process has revealed the following shortcomings in actual production:

[0003] First, uneven powder filling affects product performance. Magnetic powder particles are small and have high surface energy, making them prone to bridging or cavitation due to static electricity and friction. This results in uneven powder distribution within the mold cavity and localized voids. After direct stamping, the large density differences in the blanks make them prone to cracking and deformation during sintering, ultimately leading to poor magnetic property consistency and a high scrap rate. Simultaneously, during free-falling, a large amount of air is trapped between powder particles. If venting is not performed before pressing, this air is trapped inside the blank during high-speed stamping, forming bubbles or delamination. In severe cases, this can cause the blank to burst, reducing yield and potentially damaging the mold.

[0004] To improve filling uniformity, some production lines add vibration devices. However, vibration can cause a large amount of powder to be ejected from the gap between the mold and the hopper. Magnetic powder is expensive, especially rare earth permanent magnet materials. Dust not only wastes materials but also pollutes the workshop environment, harms the health of operators, and increases the burden on subsequent dust removal equipment. Therefore, a fully automated magnetic material molding press production line is proposed to solve the problems mentioned above. Summary of the Invention

[0005] To address the shortcomings of existing technologies and avoid problems such as low material feeding accuracy, uneven powder filling, and poor sealing, this application provides a fully automatic magnetic material molding press production line, which has advantages such as uniform material loading, effective venting, and dustproof sealing, thus solving the problems mentioned above.

[0006] This application provides a fully automated molding press production line for magnetic materials, employing the following technical solution:

[0007] A fully automatic molding press production line for magnetic materials includes a molding press, a base, and a mold mounted on a machine platform. The base is equipped with a material conveying device and a material collecting structure. The material collecting structure is located above the mold, and a traveling platform is slidably mounted on the machine platform below the mold.

[0008] A material shaking mechanism is provided between the mold and the outside of the material collection structure, and a sealing component for use with the material shaking mechanism is also provided on the top side of the mold; the material shaking mechanism includes a guide rail, a material shaking component and a drive component, wherein the material shaking component includes a slip ring sleeved on the outer surface of the mold, a guide plate fixed on the inner side of the guide rail, a reciprocating shaft that moves through the inside of the slip ring and a ball rotatably mounted on the reciprocating shaft and abutting against the guide plate, a return spring is wound around the outer surface of the reciprocating shaft, the guide plate has a wavy shape on the side near the reciprocating shaft, and the drive component is located above the slip ring;

[0009] The drive assembly includes an electric telescopic rod, a connecting plate fixed to the output end of the electric telescopic rod, and a limiting seat disposed below the connecting plate. The output end of the connecting plate is fixed with a top rod that penetrates the interior of the limiting seat. The electric telescopic rod output drives the connecting plate to move downward, and the top rod drives the slip ring and the limiting seat to move downward.

[0010] Optionally: The forming press includes a frame fixed to the outer wall of the machine base and a stamping device fixed to the frame.

[0011] Optionally: The material collection structure includes a cone-shaped hopper, and a lifting slide block that is slidably connected to the machine base is fixed on the outer wall of the hopper.

[0012] Optionally, the traveling platform includes a mounting base slidably mounted on the top side of the machine base, a traveling motor fixed to the outer wall of the mounting base, a traveling gear fixed to the output shaft of the traveling motor, and a rack fixed to the machine base.

[0013] Optionally: the traveling gear meshes with the rack, the mold bolt is fixed to the upper surface of the mounting base, and a scraper block that contacts the rack is detachably installed on the inner side of the mounting base.

[0014] Optionally: The guide rail is fixed to the upper surface of the mounting base. The slip ring is hollow inside and has a telescopic hole that runs through both the inner and outer sides. The reciprocating shaft is slidably disposed inside the telescopic hole. The ball bearings abut against the wavy surface of the guide plate, and the deformation of the return spring is used to achieve intermittent striking of the mold.

[0015] Optionally: A mounting ring is fixed to the bottom outer surface of the mold, and several ring-shaped return springs are fixed between the bottom side of the slip ring and the mounting ring.

[0016] Optionally: The electric telescopic rod is fixed to the bottom side of the lifting slide, the bottom side of the limiting seat is fixed with a limiting shaft, the top side of the mold is provided with a limiting groove that matches the limiting shaft, the limiting seat is sleeved and installed on the bottom outer surface of the hopper, the lifting slide drives the hopper to move down, so that the discharge end of the hopper extends into the mold, and at the same time the limiting shaft is inserted into the limiting groove to limit the mold.

[0017] Optional: The top side of the mold is provided with a stepped groove, and the sealing assembly is disposed inside the stepped groove. The sealing assembly includes an L-shaped receiving plate and a sealing airbag. When the electric telescopic rod drives the push rod to move down, the bottom side of the push rod abuts against the slip ring to move it down. At the same time, the locking block on the outer wall of the push rod fits against the limiting seat and drives the limiting seat to move down, so that its bottom side squeezes the receiving plate, thereby causing the sealing airbag to expand and fit against the outside of the hopper.

[0018] Optionally: the sealing airbag is located between the inner side of the receiving plate and the bottom wall of the stepped groove, and a return spring is fixed between the bottom side of the receiving plate and the inner wall of the stepped groove.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] 1. This invention uses a lifting slide to drive the hopper into the mold, while the limiting shaft is inserted into the limiting groove to complete the positioning. This dual positioning method avoids mold offset and ensures that subsequent loading, shaking, and stamping actions accurately correspond to the mold cavity, thereby improving the dimensional accuracy and consistency of the molded parts.

[0021] 2. In this invention, high-frequency light tapping is performed simultaneously during the loading process. Through the cooperation of the reciprocating shaft and the guide plate, combined with the action of the return spring, the bridging phenomenon between powder particles is effectively broken, so that the powder fills all corners of the mold cavity evenly and densely. At the same time, the trapped air is discharged, avoiding defects such as voids, lumps, and uneven density in the molded parts, and greatly improving the product qualification rate.

[0022] 3. In this invention, the sealing components operate synchronously during material vibration. The limiting seat presses down on the receiving plate, causing the sealing airbag to expand and adhere to the outer wall of the hopper, forming a dynamic seal. This effectively prevents powder from being thrown out from the gap between the mold and the hopper during vibration, reducing the waste of magnetic material powder, avoiding powder pollution of equipment and the production environment, and lowering cleaning and maintenance costs.

[0023] 4. This invention, by adjusting the downward speed and striking frequency of the electric telescopic rod, can adapt to magnetic material powders with different flowability and caking tendency, and is especially suitable for powders with poor flowability and caking tendency, thus expanding the applicability of the production line. Attached Figure Description

[0024] Figure 1 This is a three-dimensional view of the overall structure of this application;

[0025] Figure 2 This is a schematic diagram of the aggregate structure of this application;

[0026] Figure 3 This is a schematic diagram of the structure of the walking platform of this application;

[0027] Figure 4 This is a cross-sectional view of the material-distributing mechanism of this application;

[0028] Figure 5 This is a cross-sectional view of the mold structure in this application;

[0029] Figure 6 This application Figure 5 A magnified structural diagram of structure A is shown below;

[0030] Figure 7 This is a cross-sectional view of the material shaking component in this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Machine base; 2. Forming press; 21. Machine frame; 22. Stamping equipment; 3. Machine base; 4. Material conveying equipment; 5. Material collection structure; 51. Hopper; 52. Lifting slide; 6. Walking platform; 61. Mounting base; 62. Walking motor; 63. Rack; 64. Walking gear; 65. Scraper; 7. Mold; 71. Step groove; 8. Shaking mechanism; 81. Guide rail; 82. Shaking assembly; 821. Slip ring; 822. Guide plate; 823. Reciprocating shaft; 824. Ball bearing; 825. Return spring one; 826. Telescopic hole; 83. Return spring two; 84. Electric telescopic rod; 85. Connecting plate; 86. Top rod; 87. Limit seat; 88. Limit shaft; 89. Limit groove; 9. Sealing assembly; 91. Receiving plate; 92. Sealing airbag; 93. Return spring three. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0034] This application discloses a fully automatic molding press production line for magnetic materials, including a molding press 2, a base 3, and a mold 7 mounted on a machine base 1. Specifically, the molding press 2 includes a frame 21 fixed to the outer wall of the machine base 1 and a stamping device 22 fixed to the frame 21. It should be noted that the stamping equipment 22 is compatible with the mold cavity of the mold 7; the machine base 3 is respectively equipped with a material conveying device 4 and a material collecting structure 5, wherein the material collecting structure 5 is located above the mold 7, and a traveling platform 6 is slidably installed on the machine base 1 below the mold 7; in use, the mold 7 is set on the traveling platform 6, and the mold 7 can be switched between the material collecting position and the stamping position by moving the traveling platform 6, thereby improving the automation continuity of the production line; the traveling platform 6 is slidably installed on the machine base 1, and its purpose is to drive the mold 7 to move flexibly, so as to solve the problem that the material collecting and stamping processes cannot be carried out continuously when the mold 7 is fixed, and at the same time, it facilitates the material collecting operation of subsequent molded parts, thereby improving production efficiency; the material collecting structure 5 is located above the mold 7, and its purpose is to accurately guide the magnetic material powder conveyed by the material conveying device 4 into the mold cavity of the mold 7, so as to avoid powder spillage and reduce material waste.

[0035] In this embodiment, the material collection structure 5 includes a conical hopper 51, and a lifting slide 52 that is slidably connected to the machine base 3 is fixed on the outer wall of the hopper 51. It should be noted that the conical structure prevents powder from accumulating and clumping in the hopper 51, ensuring smooth feeding, and allowing the powder to be accurately introduced into the mold cavity of the mold 7, reducing powder spillage. The lifting slide 52 is fixed to the outer wall of the hopper 51 and slidably connected to the machine base 3. Its function is to drive the hopper 51 to move up and down. The purpose of this setting is to adjust the position of the hopper 51 according to the height of the mold 7, so that the discharge end of the hopper 51 can extend into the mold 7, further improving the feeding accuracy, and at the same time adapting to molds 7 of different heights, expanding the applicability of the production line.

[0036] The traveling platform 6 includes a mounting base 61 slidably mounted on the top side of the machine base 1, a traveling motor 62 fixed to the outer wall of the mounting base 61, a traveling gear 64 fixed to the output shaft of the traveling motor 62, and a rack 63 fixed to the machine base 1; it can provide a stable mounting platform for the mold 7 and drive the mold 7 to slide along the machine base 1. The traveling gear 64 meshes with the rack 63, the mold 7 is bolted to the upper surface of the mounting base 61, and a scraper 65 that contacts the rack 63 is detachably mounted on the inner side of the mounting base 61.

[0037] In this embodiment, a shaking mechanism 8 is provided between the mold 7 and the outside of the material collection structure 5, and a sealing component 9 for use with the shaking mechanism 8 is also provided on the top side of the mold 7. The shaking mechanism 8 includes a guide rail 81, a shaking component 82 and a drive component. The shaking component 82 includes a slip ring 821 sleeved on the outer surface of the mold 7, a guide plate 822 fixed on the inner side of the guide rail 81, a reciprocating shaft 823 that moves through the inside of the slip ring 821, and a ball bearing 824 that is rotatably mounted on the reciprocating shaft 823 and abuts against the guide plate 822. A return spring 825 is wound around the outer surface of the reciprocating shaft 823, which can realize the automatic return of the reciprocating shaft 823. The purpose of this setting is to drive the reciprocating shaft 823 to quickly return when the ball bearing 824 disengages from the protruding part of the wavy surface of the guide plate 822, so as to ensure the continuity and high frequency of the striking action.

[0038] It should be noted that the guide plate 822 has a wavy shape on the side near the reciprocating shaft 823, and the drive component is located above the slip ring 821. In use, the shaking mechanism 8 is set between the mold 7 and the outside of the material collection structure 5. It can intermittently tap the mold 7 during the feeding process to make the magnetic material powder in the mold cavity evenly distributed. The purpose of setting it is to solve the problems of magnetic material powder being prone to clumping, uneven filling, and air entrainment, and to ensure the density uniformity and quality stability of the molded parts. The sealing component 9 is set on the top side of the mold 7 and works with the shaking mechanism 8. Its function is to seal the connection between the mold 7 and the material collection structure 5 during the shaking process, which can prevent the powder from being thrown out from the gap during vibration, reduce material waste and keep the production environment clean.

[0039] In this embodiment, the driving assembly includes an electric telescopic rod 84, a connecting plate 85 fixed to the output end of the electric telescopic rod 84, and a limiting seat 87 disposed below the connecting plate 85. A push rod 86, penetrating the interior of the limiting seat 87, is fixed to the output end of the connecting plate 85. The electric telescopic rod 84 drives the connecting plate 85 to move downwards, and the push rod 86 drives the slip ring 821 and the limiting seat 87 to move downwards. Specifically, the guide rail 81 is fixed to the upper surface of the mounting base 61. The slip ring 821 is hollow inside, and its interior has telescopic holes 826 penetrating both the inner and outer sides. The reciprocating shaft 823 is slidably disposed inside the telescopic holes 826. Through the ball bearing 824 abutting against the wavy surface of the guide plate 822, and in conjunction with the deformation of the return spring 825, intermittent striking of the mold 7 is achieved. It should be noted that a retaining ring capable of displacing the limiting seat 87 is installed on the outer surface of the push rod 86.

[0040] In this embodiment, an installation ring is fixed on the bottom outer surface of the mold 7, and several ring-shaped return springs 83 are fixed between the bottom side of the slip ring 821 and the installation ring; this enables the slip ring 821 to be quickly reset, ensuring the continuity of the shaking action, while buffering the downward impact force of the slip ring 821.

[0041] In this embodiment, the electric telescopic rod 84 is fixed to the bottom side of the lifting slide 52, and the bottom side of the limiting seat 87 is fixed with a limiting shaft 88. The top side of the mold 7 is provided with a limiting groove 89 that matches the limiting shaft 88. The limiting seat 87 is sleeved and installed on the bottom outer surface of the hopper 51. The lifting slide 52 drives the hopper 51 to move downward, so that the discharge end of the hopper 51 extends into the mold 7. At the same time, the limiting shaft 88 is inserted into the limiting groove 89 to limit the mold 7. It should be noted that a limiting ring is installed on the outer surface of the hopper 51, so that the limiting seat 87 can only move downward. Therefore, when the hopper 51 moves downward, the limiting seat 87 will not move due to the limitation of the limiting ring, thereby inserting the limiting shaft 88 into the limiting groove 89 to limit the mold 7 and prevent the limiting seat 87 from shifting, thus ensuring the compression sealing effect of the sealing assembly 9.

[0042] To improve the material conveying environment, a stepped groove 71 is provided on the top side of the mold 7. The sealing component 9 is set inside the stepped groove 71. The sealing component 9 includes an L-shaped receiving plate 91 and a sealing airbag 92. When the electric telescopic rod 84 drives the push rod 86 to move down, the bottom side of the push rod 86 abuts against the slip ring 821 to make it move down. At the same time, the locking block on the outer wall of the push rod 86 fits against the limiting seat 87, causing the limiting seat 87 to move down, so that its bottom side squeezes the receiving plate 91, thereby causing the sealing airbag 92 to expand and fit against the outside of the hopper 51.

[0043] It should be noted that the sealing airbag 92 is located between the inner side of the receiving plate 91 and the bottom wall of the stepped groove 71, and the sealing component 9 is set inside the stepped groove 71. Its function is to achieve a seal at the connection between the mold 7 and the hopper 51. The purpose of this design is to prevent powder from being thrown out of the gap during material shaking, reduce material waste, and keep the production environment clean. The receiving plate 91 is L-shaped. Its function is to receive the extrusion force of the limiting seat 87 and transmit it to the sealing airbag 92. The purpose of this design is to ensure that the sealing airbag 92 can expand evenly under force through the force transmission of the L-shaped structure, ensuring that the sealing airbag 92 fits tightly against the outside of the hopper 51. At the same time, the L-shaped structure can prevent the receiving plate 91 from deforming during the extrusion process. A return spring 93 is fixed between the bottom side of the receiving plate 91 and the inner wall of the stepped groove 71. This enables the receiving plate 91 to automatically reset. The purpose of this setting is to drive the receiving plate 91 to reset upward when the limiting seat 87 moves upward and the compressive force is released, thereby causing the sealing airbag 92 to contract and reset. This prevents the sealing airbag 92 from being in an inflated state for a long time, which could lead to aging and damage. At the same time, the return spring 93 can also buffer the compressive force of the limiting seat 87, preventing the receiving plate 91 and the sealing airbag 92 from being damaged due to excessive pressure.

[0044] Combined with appendix Figures 1-7 The working principle of the above embodiments is as follows:

[0045] Magnetic material powder is placed in the conveying device 4, and the powder is accurately conveyed to the collecting structure 5 through the conveying device 4. The hopper 51 of the collecting structure 5 is driven down by the lifting slide 52, so that its bottom outlet extends into the interior of the mold 7. At the same time, the limiting shaft 88 is inserted into the limiting groove 89 on the top side of the mold 7 to complete the positioning of the mold 7.

[0046] Subsequently, the material is fed into the mold cavity of the mold 7 through the hopper 51. During the loading process, the electric telescopic rod 84 in the drive assembly drives the connecting plate 85 and the ejector rod 86 to move downward. The ejector rod 86 pushes the slip ring 821 to slide downward along the outer wall of the mold 7. When the slip ring 821 moves downward, its internal reciprocating shaft 823 abuts against the wavy surface of the guide plate 822 through the ball bearing 824. Since the guide plate 822 is fixed and the slip ring 821 continues to move downward, the wavy surface forces the reciprocating shaft 823 to make repeated radial extension and retraction movements in the telescopic hole 826, which is coordinated with the return spring 825. The force is applied to achieve intermittent, high-frequency, slight tapping on the outer wall of the mold 7; the tapping vibration is transmitted to the powder material inside the mold 7, which can effectively break the bridging phenomenon between powder particles, so that the powder is filled more evenly and densely in all corners of the mold 7, and at the same time, the air trapped between the powder particles is discharged. During the shaking process, the sealing component 9 moves synchronously, the push rod 86 drives the limit seat 87 to press down, squeeze the receiving plate 91, so that the sealing airbag 92 expands and fits tightly against the outer wall of the hopper 51 to form a dynamic seal, preventing the powder from being thrown out from the gap between the mold 7 and the hopper 51 during shaking.

[0047] After feeding is completed, the hopper 51 is withdrawn, and the walking motor 62 of the walking platform 6 is started, driving the walking gear 64 to rotate along the rack 63, thereby driving the mounting base 61 and the mold 7 fixed on the mounting base 61 to slide directly below the forming press 2. The stamping equipment 22 of the forming press 2, supported by the frame 21, stamps the magnetic material powder in the mold 7 downwards.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fully automatic molding press production line for magnetic materials, comprising a molding press (2), a machine base (3), and a mold (7) mounted on a machine base (1), characterized in that: The base (3) is provided with a material conveying device (4) and a material collection structure (5), wherein the material collection structure (5) is located above the mold (7), and a walking platform (6) is slidably installed on the machine base (1) below the mold (7). A shaking mechanism (8) is provided between the mold (7) and the outside of the material collection structure (5), and a sealing component (9) is also provided on the top side of the mold (7) to cooperate with the shaking mechanism (8); the shaking mechanism (8) includes a guide rail (81), a shaking component (82) and a driving component, wherein the shaking component (82) includes a slip ring (821) sleeved on the outer surface of the mold (7), a guide plate (822) fixed on the inner side of the guide rail (81), a reciprocating shaft (823) that moves through the inside of the slip ring (821) and a ball (824) that is rotatably installed on the reciprocating shaft (823) and abuts against the guide plate (822), a return spring (825) is wound around the outer surface of the reciprocating shaft (823), and the side of the guide plate (822) near the reciprocating shaft (823) has a wavy shape, and the driving component is located above the slip ring (821); The drive assembly includes an electric telescopic rod (84), a connecting plate (85) fixed to the output end of the electric telescopic rod (84), and a limiting seat (87) disposed below the connecting plate (85). The output end of the connecting plate (85) is fixed with a top rod (86) that penetrates the interior of the limiting seat (87). The output of the electric telescopic rod (84) drives the connecting plate (85) to move downward, and the top rod (86) drives the slip ring (821) and the limiting seat (87) to move downward.

2. The fully automatic molding press production line for magnetic materials according to claim 1, characterized in that: The forming press (2) includes a frame (21) fixed to the outer wall of the machine base (1) and a stamping device (22) fixed to the frame (21).

3. The fully automatic molding press production line for magnetic materials according to claim 1, characterized in that: The material collection structure (5) includes a cone-shaped hopper (51), and a lifting slide (52) that is slidably connected to the base (3) is fixed on the outer wall of the hopper (51).

4. The fully automatic molding press production line for magnetic materials according to claim 1, characterized in that: The walking platform (6) includes a mounting base (61) slidably mounted on the top side of the machine base (1), a walking motor (62) fixed on the outer wall of the mounting base (61), a walking gear (64) fixed on the output shaft of the walking motor (62), and a rack (63) fixed on the machine base (1).

5. The fully automatic molding press production line for magnetic materials according to claim 4, characterized in that: The traveling gear (64) meshes with the rack (63), the mold (7) is bolted to the upper surface of the mounting base (61), and a scraper (65) that contacts the rack (63) is detachably installed on the inner side of the mounting base (61).

6. The fully automatic molding press production line for magnetic materials according to claim 4, characterized in that: The guide rail (81) is fixed to the upper surface of the mounting base (61). The slip ring (821) is hollow inside. The slip ring (821) has a telescopic hole (826) that runs through both the inner and outer sides. The reciprocating shaft (823) is slidably disposed inside the telescopic hole (826). The ball bearing (824) abuts against the wave surface of the guide plate (822), and the deformation of the return spring (825) is coordinated to achieve intermittent knocking on the mold (7).

7. The fully automatic molding press production line for magnetic materials according to claim 1, characterized in that: The bottom outer surface of the mold (7) is fixed with an installation ring, and a number of ring-shaped return springs (83) are fixed between the bottom side of the slip ring (821) and the installation ring.

8. The fully automatic molding press production line for magnetic materials according to claim 3, characterized in that: The electric telescopic rod (84) is fixed to the bottom side of the lifting slide (52), and the bottom side of the limiting seat (87) is fixed with a limiting shaft (88). The top side of the mold (7) is provided with a limiting groove (89) that is compatible with the limiting shaft (88). The limiting seat (87) is sleeved and installed on the bottom outer surface of the hopper (51). The lifting slide (52) drives the hopper (51) to move down, so that the discharge end of the hopper (51) extends into the mold (7). At the same time, the limiting shaft (88) is inserted into the limiting groove (89) to limit the mold (7).

9. The fully automatic molding press production line for magnetic materials according to claim 3, characterized in that: The mold (7) has a stepped groove (71) on its top side. The sealing component (9) is located inside the stepped groove (71). The sealing component (9) includes an L-shaped receiving plate (91) and a sealing airbag (92). When the electric telescopic rod (84) drives the push rod (86) to move down, the bottom side of the push rod (86) abuts against the slip ring (821) to move down. At the same time, the locking block on the outer wall of the push rod (86) fits against the limiting seat (87) and drives the limiting seat (87) to move down, so that its bottom side squeezes the receiving plate (91), thereby causing the sealing airbag (92) to expand and fit against the outside of the hopper (51).

10. The fully automatic molding press production line for magnetic materials according to claim 9, characterized in that: The sealing airbag (92) is located between the inner side of the receiving plate (91) and the bottom wall of the stepped groove (71), and a return spring (93) is fixed between the bottom side of the receiving plate (91) and the inner wall of the stepped groove (71).

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