Magnetic material compression molding die

Abstract

The utility model discloses a magnetic material compression molding die, which comprises an outer die and an inner die, the outer die is provided with a slot with an opening at the upper end, the inner die is arranged in the slot in a vertical sliding manner, the inner die is of a hollow structure with an opening at the upper end, the inner die comprises a bottom block and a plurality of vertical blocks, and the plurality of vertical blocks are circumferentially distributed at the edge of the bottom block at equal intervals. The adjacent vertical blocks are attached to each other, the bottom ends of the vertical blocks are hinged to the bottom blocks, and the vertical blocks are arranged on the bottom blocks in an up-down rotating mode. The vertical block is separated from the blank by rotating the vertical block, so that the blank is basically not scratched with the vertical block, the probability that corners of the blank are damaged is reduced, and the appearance quality and the forming quality of the blank are improved.

Description

Technical Field

[0001] This utility model relates to the field of magnetic material production, specifically to a magnetic material pressing mold. Background Technology

[0002] In the production and processing of magnetic materials, compression molding is one of the key technological steps. After the magnetic material blank is compressed in the mold, it needs to be demolded. During demolding, the blank is usually lifted upwards to detach from the mold. However, during this lifting process, the edges and corners of the blank may scrape against the inner wall of the mold or other parts. Because the blank itself has a certain degree of brittleness after compression, the edges and corners are easily damaged, chipped, or cracked when subjected to the scraping force of the mold. This damage not only affects the appearance quality of the blank but also reduces the molding quality of the magnetic material blank, leading to the production of defective products, increasing production costs, and reducing production efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a magnetic material pressing mold. This mold separates the vertical block from the blank by rotating the vertical block, so that the blank will not scrape against the vertical block, thereby reducing the probability of damage to the edges and corners of the blank and improving the appearance quality and molding quality of the blank.

[0004] The technical solution adopted by this utility model to solve the above problems is:

[0005] A magnetic material pressing mold includes an outer mold and an inner mold. The outer mold is provided with a slot with an opening at the top. The inner mold is slidably disposed in the slot. The inner mold has a hollow structure with an opening at the top. The inner mold includes a bottom block and several vertical blocks. The vertical blocks are distributed at equal intervals around the edge of the bottom block. Adjacent vertical blocks fit together. The bottom end of the vertical blocks is hinged to the bottom block. The vertical blocks are rotatably disposed on the bottom block.

[0006] In the above technical solution, preferably, the bottom end of the slot is provided with a through hole, and a push rod is slidably disposed in the through hole, the top end of the push rod being threadedly connected to the lower side of the inner mold.

[0007] In the above technical solution, preferably, an elastic sheet is provided between the vertical block and the bottom block to drive the vertical block to rotate and unfold.

[0008] In the above technical solution, preferably, the slot includes a vertical section and a flared section. The vertical section is located at the bottom of the slot and the inner side of the vertical section fits against the outer side of the inner mold. The flared section is located above the vertical section and the flared section is flared in an upwardly gradually expanding shape. The inner side of the flared section is arc-shaped.

[0009] In the above technical solution, preferably, the bottom end of the slot has a plurality of holes evenly spaced around its circumference, and the vertical cross-section of the holes is funnel-shaped.

[0010] Compared with the prior art, this utility model has the following advantages and effects:

[0011] This invention involves inserting an inner mold into a slot in an outer mold. The inner wall of the slot abuts against the vertical blocks of the inner mold, ensuring the vertical blocks remain vertical and adjacent blocks are in close contact. Powder is injected into the cavity of the inner mold through an opening at the top. A press is then used to shape the powder. Finally, the inner mold is removed from the slot, and rotating the vertical blocks unfolds the inner mold, allowing the formed blank to be removed. Because the vertical blocks separate from the blank when it is removed from the inner mold, the blank is unlikely to scrape against the blocks, thus reducing the probability of edge damage. This improves the appearance and forming quality of the blank, increases the yield rate, reduces production costs, and increases production efficiency. Attached Figure Description

[0012] Figure 1 This is a cross-sectional schematic diagram of the magnetic material pressing mold according to an embodiment of this utility model.

[0013] Figure 2 yes Figure 1 Enlarged view of the connection position between the middle vertical block and the bottom block.

[0014] Figure 3 yes Figure 1 A three-dimensional view of the unfolded state of the inner mold.

[0015] The components include: outer mold 1, slot 11, through hole 12, vertical section 13, flared section 14, drain hole 15, inner mold 2, bottom block 21, vertical block 22, top rod 3, and elastic sheet 4. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0017] See Figures 1-3 This embodiment provides a magnetic material pressing mold, including an outer mold 1 and an inner mold 2. The outer mold 1 is provided with a slot 11 with an opening at the top. The inner mold 2 is slidably disposed in the slot 11. The inner mold 2 has a hollow structure with an opening at the top. The inner mold 2 includes a bottom block 21 and several vertical blocks 22. The several vertical blocks 22 are distributed at equal intervals around the edge of the bottom block 21. Adjacent vertical blocks 22 fit together. The bottom end of the vertical block 22 is hinged to the bottom block 21. The vertical blocks 22 are rotatably disposed on the bottom block 21.

[0018] This invention involves inserting an inner mold 2 into a slot 11 of an outer mold 1. The inner wall of the slot 11 abuts against the vertical blocks 22 of the inner mold 2, ensuring the vertical blocks 22 remain vertical and adjacent blocks 22 are in close contact. Powder is injected into the cavity of the inner mold 2 through the upper opening, and then a press is used to press the powder into shape. Finally, the inner mold 2 is removed from the slot 11, and the vertical blocks 22 are rotated to unfold the inner mold 2, allowing the formed blank to be removed. Since the vertical blocks 22 are separated from the blank when it is removed from the inner mold 2, the blank will not scrape against the vertical blocks 22, thus reducing the probability of edge damage to the blank, improving the appearance quality and forming quality of the blank, increasing the yield rate, thereby reducing production costs and improving production efficiency.

[0019] See Figure 1 The bottom end of the slot 11 is provided with a through hole 12, and a push rod 3 is slidably disposed in the through hole 12. The top end of the push rod 3 is threadedly connected to the lower side of the inner mold 2.

[0020] By using a driving device (such as a cylinder, hydraulic cylinder, or electric push rod) to move the ejector rod 3 upwards, the inner mold 2 moves upwards and is removed from the slot 11, improving the convenience of blank demolding. Furthermore, by driving the ejector rod 3 downwards, the inner mold 2 is reset, facilitating the continuation of powder pressing and molding, thus improving production continuity and efficiency. The threaded connection between the inner mold 2 and the ejector rod 3 allows for easy replacement of the inner mold 2, thereby meeting the pressing and molding requirements of blanks with different shapes and specifications.

[0021] See Figure 2 , Figure 3 An elastic sheet 4 is provided between the vertical block 22 and the bottom block 21 to drive the vertical block 22 to rotate and unfold.

[0022] When the inner mold 2 is moved out of the slot 11 under the action of the ejector rod 3, the vertical block 22 can automatically rotate and unfold under the action of the elastic sheet 4, so as to facilitate the removal of the blank.

[0023] See Figure 1 The slot 11 includes a vertical section 13 and a flared section 14. The vertical section 13 is located at the bottom of the slot 11 and the inner side of the vertical section 13 fits against the outer side of the inner mold 2. The flared section 14 is located above the vertical section 13 and the flared section 14 is flared in a gradually expanding upward shape. The inner side of the flared section 14 is arc-shaped.

[0024] When the bottom end of the inner mold 2 is located within the vertical section 13, the vertical block 22 remains closed along the limiting line of the vertical section 13, thus preventing powder leakage from the inner mold 2 and ensuring the normal implementation of powder pressing and molding. When the inner mold 2 moves upward under the action of the push rod 3, causing the bottom end of the inner mold 2 to move into the flared section 14, the vertical block 22 gradually rotates and unfolds under the action of the elastic plate 4 and the arc-shaped inner surface. The arc-shaped inner surface acts as a buffer for the unfolding of the vertical block 22, avoiding the probability of damage to the inner mold 2 due to the rapid unfolding of the vertical block 22 under the action of the elastic plate 4. At the same time, when the push block drives the inner mold 2 downward to be inserted back into the slot 11, the arc-shaped inner surface can guide the vertical block 22, allowing the vertical block 22 to automatically rotate and reset without manual rotation and reset, reducing the amount of manual work required during the operation of this utility model and improving production efficiency.

[0025] See Figure 1 The bottom end of the slot 11 has a plurality of holes 15 that are equally spaced around the circumference, and the vertical cross-section of the holes 15 is funnel-shaped.

[0026] When powder is injected into the inner mold 2, there is a possibility that the powder may fall from the flared section 14 into the slot 11. Also, when the inner mold 2 is unfolded, some unpressed powder may fall from the inner mold 2 into the slot 11. Therefore, in order to reduce the impact of the powder falling into the bottom of the slot 11 on the insertion of the inner mold 2 into the slot 11, the fallen powder is removed from the slot 11 through the drain hole 15 to ensure that the slot 11 is clean and free of debris.

[0027] In this invention, an air outlet device can be installed diagonally above the inner mold 2 (for example, using a fan connected to a pipe so that the air outlet is located diagonally above the inner mold 2 and aligned with the inner mold 2). After the inner mold 2 is unfolded and the blank is removed, the air outlet device outputs airflow to the unfolded inner mold 2 to blow away the residual powder on the inner mold 2. This reduces the risk that powder will be trapped between the vertical block 22 and the bottom block 21 or between adjacent vertical blocks 22, causing the adjacent vertical blocks 22 to not fit tightly or even be unable to be inserted into the slot 11 after the inner mold 2 is closed. This ensures the normal operation of this invention.

[0028] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.

Claims

1. A magnetic material pressing mold, characterized in that: It includes an outer mold and an inner mold. The outer mold is provided with a slot with an opening at the top. The inner mold is slidably disposed in the slot. The inner mold has a hollow structure with an opening at the top. The inner mold includes a bottom block and several vertical blocks. The vertical blocks are distributed at equal intervals around the edge of the bottom block. Adjacent vertical blocks fit together. The bottom end of the vertical blocks is hinged to the bottom block. The vertical blocks are rotatably disposed on the bottom block.

2. The magnetic material pressing mold according to claim 1, characterized in that: The slot has a through hole at its bottom, and a push rod is slidably installed inside the through hole. The top of the push rod is threadedly connected to the lower side of the inner mold.

3. The magnetic material pressing mold according to claim 1, characterized in that: An elastic sheet is provided between the vertical block and the bottom block to drive the vertical block to rotate and unfold.

4. The magnetic material pressing mold according to claim 1, characterized in that: The slot includes a vertical section and a flared section. The vertical section is located at the bottom of the slot and its inner side fits against the outer side of the inner mold. The flared section is located above the vertical section and its flared section gradually widens upwards. The inner side of the flared section is arc-shaped.

5. The magnetic material pressing mold according to claim 1, characterized in that: The bottom of the slot has several equally spaced perforated holes, and the vertical cross-section of the perforations is funnel-shaped.

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