Die-casting forming die and die-casting forming method of magnetic blank

Abstract

The invention provides a die-casting forming die and a die-casting forming method of a magnetic blank. The die-casting forming die and the die-casting forming method are used for integrally punching and forming the magnetic blank. The magnetic blank comprises a base plate, a central column vertically arranged on the base plate and a shell arranged on the outer side of the central column in a surrounding mode. The die-casting forming die comprises an upper die assembly, a middle die assembly and a lower die assembly. The upper die assembly and the lower die assembly are arranged on the upper side and the lower side of the middle die assembly respectively and can move relative to the middle die assembly. The middle die assembly is provided with a vertically-through punching hole. The upper die assembly comprises an upper stamping part matched with the stamping hole, and the upper stamping part is configured to be capable of entering the stamping hole so as to form a base plate of the magnetic blank in a stamping mode; the lower die assembly comprises a first forming piece and a second forming piece which are matched with the stamping hole, and the first forming piece and the second forming piece are combined to enter the stamping hole to be used for stamping a center column and a shell of the magnetic blank. Compared with the prior art, the outer side of the magnetic blank center column is punched to form the shell, and it is guaranteed that the center column is not damaged in the forming and transporting process.

Description

Technical Field

[0001] The present invention relates to the field of mold technology, and in particular to a die-casting mold and a die-casting method for a magnetic embryo. Background Art

[0002] In the traditional mold process, T-shaped magnetic embryos are a common structural form and are widely used in the manufacture of various magnetic products. Its molding process is relatively mature and efficient. The design of the T-shaped magnetic embryo cleverly connects the head and the rod through the middle column below, which not only meets specific functional requirements, but also maintains good molding and stability during the manufacturing process. However, although the molding process of the T-shaped magnetic embryo is relatively simple, some problems that need to be solved are exposed in the subsequent transportation and storage links.

[0003] Specifically, after the T-shaped magnetic embryo is formed, due to the special structure, especially the slender shape of the lower middle column, the physical strength of the entire embryo has certain weak links. During transportation, due to the influence of various factors such as road conditions and handling methods, the T-shaped magnetic embryo is prone to collision or fall, and the middle column is often the first point of force. Once the middle column is subjected to excessive impact force, it is easy to break, which will not only cause the overall structure of the T-shaped magnetic embryo to become unstable, but also seriously affect its magnetic properties and subsequent processing quality, and ultimately lead to defective products.

[0004] In view of this, it is indeed necessary to provide a die-casting mold and a die-casting method for a magnetic embryo to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a die-casting mold, which can effectively protect the magnetic embryo and prevent the central column of the magnetic embryo from being broken and damaged during the molding and transportation of the magnetic embryo.

[0006] To achieve the above-mentioned purpose, the present invention provides a die-casting mold for integrally stamping a magnetic embryo, wherein the magnetic embryo includes a substrate, a center column erected on the substrate, and an outer shell surrounding the outside of the center column, and the die-casting mold includes: an upper mold assembly, a middle mold assembly, and a lower mold assembly, wherein the upper mold assembly and the lower mold assembly are respectively arranged on the upper and lower sides of the middle mold assembly and can move relative to the middle mold assembly; the middle mold assembly is provided with a stamping hole that passes through the upper and lower parts; the upper mold assembly includes an upper stamping part adapted to the stamping hole, and the upper stamping part is configured to be able to enter the stamping hole to stamp out the substrate of the magnetic embryo; the lower mold assembly includes a first molding part and a second molding part adapted to the stamping hole, and the first molding part and the second molding part are combined to enter the stamping hole to stamp out the center column and the outer shell of the magnetic embryo.

[0007] As a further improvement of the present invention, the first molded part includes a first inner molded part and a first outer molded part which is U-shaped and arranged outside the first inner molded part, and a gap is formed between the first inner molded part and the first outer molded part.

[0008] As a further improvement of the present invention, the first inner molded part is a square column, and the first outer molded part is arranged on the outer sides of three outer wall surfaces of the first inner molded part.

[0009] As a further improvement of the present invention, the second molded part includes a second outer molded part adapted to the first outer molded part, and a second inner molded part adapted to the first inner molded part, the second outer molded part is configured to be inserted into the gap between the first inner molded part and the first outer molded part to stamp out the outer shell, and the first inner molded part is configured to be inserted into the second inner molded part to stamp out the center column.

[0010] As a further improvement of the present invention, the second inner molded part is a through groove opened at the middle position of the second outer molded part for the first inner molded part to be inserted.

[0011] As a further improvement of the present invention, the lower mold assembly includes a first lower mold base fixedly connected to the first molding part and a second lower mold base fixedly connected to the second molding part; wherein, the second lower mold base is provided with a plug-in portion adapted to the first molding part on one side facing the first molding part, so that the first molding part can be inserted into the second lower mold base and slide in the second lower mold base.

[0012] As a further improvement of the present invention, the inserting portion includes an insert hole that passes through the second lower mold base and a slot that is arranged around the outside of the insert hole, and the insert hole is adapted to the first inner molded part for the first inner molded part to pass through; the slot also passes through the second lower mold base and is adapted to the first outer molded part for the first outer molded part to pass through.

[0013] As a further improvement of the present invention, the middle mold assembly is provided with at least two punching holes.

[0014] Another object of the present invention is to provide a die-casting method for a magnetic blank applied to the above-mentioned die-casting mold.

[0015] To achieve the above object, the present invention provides a die-casting method for a magnetic embryo, which is applied to the above-mentioned die-casting mold and mainly includes the following steps:

[0016] Insert the first molded part into the second molded part, and press them upward from the punching hole into the middle mold assembly;

[0017] Align the upper punch of the upper die assembly with the punch hole and insert it downward from the punch hole into the middle die assembly;

[0018] Adjusting the relative height between the first molded part and the second molded part, and the depth of the upper punching part entering the punching hole;

[0019] The powder material is extruded in the middle mold assembly to form a center column and a shell surrounding the outside of the center column between the first molded part and the second molded part, and a base plate is formed between the upper mold assembly and the middle mold assembly. The base plate, the center column and the shell are stamped and formed as a whole to form a magnetic embryo.

[0020] As a further improvement of the present invention, after the magnetic embryo is stamped and formed, the lower mold assembly moves toward the upper mold assembly to remove the magnetic embryo from the middle mold assembly.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The die-casting mold of the present invention uses an upper punching part to enter the punching hole to punch out the substrate of the magnetic embryo, and uses a combination of a first forming part and a second forming part to enter the punching hole to punch out the center column and the shell of the magnetic embryo. The shell is arranged around the outside of the center column, which effectively protects the center column and prevents the center column from being broken and damaged during the forming and transportation of the magnetic embryo. At the same time, the present invention can punch out the magnetic embryo in one piece, and the substrate, center column and shell of the magnetic embryo are formed simultaneously in the mold without the need for subsequent splicing or assembly steps, which not only simplifies the production process, but also significantly enhances the overall structural strength of the magnetic embryo. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a die-casting mold according to an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 An exploded view of the die casting mold shown;

[0025] Figure 3 is a schematic diagram of the structure of a magnetic embryo according to an embodiment of the present invention;

[0026] Figure 4 yes Figure 1 A cross-sectional view of the die-casting mold shown;

[0027] Figure 5 is a structural schematic diagram of a first molding component and a first lower mold base;

[0028] Figure 6 is a structural schematic diagram of the second molding assembly and the second lower mold base;

[0029] Figure 7 yes Figure 6 Schematic diagram of the structure from another angle. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] It should be noted here that in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0032] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0033] like Figure 1 As shown in FIG. 1 , a die-casting mold 100 provided by the present invention is provided. The die-casting mold 100 in this embodiment is used for integrally stamping and forming a magnetic embryo 200. Figure 3 As shown, the magnetic embryo 200 includes a substrate 210, a central column 220 erected on the substrate 210, and a shell 230 surrounding the outer side of the central column 220. The die-casting mold 100 of the present invention forms the shell 230 by stamping the outer side of the central column 220, thereby forming an outer periphery protection for the central column 220 and ensuring that the central column 220 is not damaged during the molding and transportation process.

[0034] The base plate 210 , the center column 220 and the outer shell 230 are formed simultaneously in the die-casting mold 100 , without the need for subsequent splicing or assembly steps, which not only simplifies the production process but also significantly enhances the overall structural strength of the magnetic embryo 200 .

[0035] The die casting mold 100 includes an upper mold assembly 120, a middle mold assembly 110, and a lower mold assembly 130. The upper mold assembly 120 and the lower mold assembly 130 are respectively arranged on the upper and lower sides of the middle mold assembly 110 and can move relative to the middle mold assembly 110. In this embodiment, during the stamping process, the middle mold assembly 110 is fixed, and the upper mold assembly 120 and the lower mold assembly 130 move in the middle mold assembly 110 along the vertical direction to stamp the powder material.

[0036] In other embodiments, the die-casting mold 100 may also be disposed horizontally, with the upper mold assembly 120 and the lower mold assembly 130 disposed on the left and right sides of the middle mold assembly 110 , respectively.

[0037] like Figure 2As shown, the middle die assembly 110 is provided with a punching hole 1101 that passes through from top to bottom. The middle die assembly 110 is fixed and provides a reference and positioning for the entire stamping process. The punching hole 1101 is used to accommodate powder materials and perform stamping. The punching hole 1101 that passes through from top to bottom enables the stamping actions of the upper die assembly 120 and the lower die assembly 130 to act on the powder materials at the same time, thereby achieving a more uniform stamping effect and higher forming accuracy.

[0038] Furthermore, at least two punching holes 1101 are provided on the middle mold assembly 110. In this way, multiple magnetic embryos 200 can be formed simultaneously in one punching process, which greatly improves production efficiency. In this embodiment, two punching holes 1101 are provided on the middle mold assembly 110 to form two magnetic embryos 200 simultaneously in one punching process. Of course, according to actual needs, the number of punching holes 1101 on the middle mold assembly 110 can be more or less.

[0039] The upper die assembly 120 includes an upper punch 1201 adapted to the punch hole 1101, and the upper punch 1201 is configured to be able to enter the punch hole 1101 to punch out the substrate 210 of the magnetic embryo 200. The upper punch 1201 can accurately enter the punch hole 1101, apply uniform pressure to the powder material, and thus punch out the substrate 210 with a uniform shape and size.

[0040] The lower mold assembly 130 includes a first molded part 1301 and a second molded part 1302 adapted to the punching hole 1101. The first molded part 1301 and the second molded part 1302 are combined to enter the punching hole 1101 to punch out the center column 220 and the shell 230 of the magnetic embryo 200. The precise adaptation of the first molded part 1301 and the second molded part 1302 to the punching hole 1101 ensures that the powder material can be accurately filled into the predetermined position of the mold during the punching process to form the center column 220 and the shell 230 of the magnetic embryo 200.

[0041] Furthermore, the die-casting mold 100 also includes a powder feeding device (not shown). When the first molding part 1301 and the second molding part 1302 are combined to enter the punching hole 1101 and arrive at a set position, the entire punching hole 1101 forms a semi-enclosed cavity. At this time, after the powder material is fed into the punching hole 1101 by the powder feeding device, the upper punching part 1201 enters the punching hole 1101 to punch and form the powder material.

[0042] It should be noted that the compression ratio of the powder material is between 1:2 and 1:2.5, that is, an appropriate amount of powder material should be fed into the punching hole 1101 according to the compression ratio based on the specific structural requirements of the magnetic embryo 200 .

[0043] like Figure 5As shown, the first molded part 1301 includes a first inner molded part 1311 and a first outer molded part 1312 which is U-shaped and arranged outside the first inner molded part 1311. A gap 1313 is formed between the first inner molded part 1311 and the first outer molded part 1312. The first inner molded part 1311 is used to form the central column 220 part of the magnetic embryo 200, and the first outer molded part 1312 is used to form the outer shell 230 part of the magnetic embryo 200.

[0044] Specifically, the first inner molded part 1311 is a square column, and the first outer molded part 1312 is arranged outside the three outer wall surfaces of the first inner molded part 1311. That is, on the outer shell 230 formed by stamping, the portion corresponding to one outer wall surface of the first inner molded part 1311 not surrounded by the first outer molded part 1312 is open, which is convenient for subsequent use or processing.

[0045] like Figure 6 As shown, the second molded part 1302 includes a second outer molded part 1322 matched with the first outer molded part 1312, and a second inner molded part 1321 matched with the first inner molded part 1311. The second inner molded part 1321 is used to form the central column 220 of the magnetic embryo 200, and the second outer molded part 1322 is used to form the outer shell 230 of the magnetic embryo 200.

[0046] Specifically, the second inner molded part 1321 is a through groove opened at the middle position of the second outer molded part 1322 for the first inner molded part 1311 to be inserted into, thereby ensuring the precise fit between the first inner molded part 1311 and the second inner molded part 1321 .

[0047] During the stamping process, the second outer molded part 1322 and the second inner molded part 1321 can cooperate with the first outer molded part 1312 and the first inner molded part 1311 respectively to form the outer shell 230 and the center column 220 of the magnetic embryo 200. The second outer molded part 1322 is accurately inserted into the gap 1313 between the first inner molded part 1311 and the first outer molded part 1312 to stamp out the outer shell 230, thereby ensuring the accuracy and consistency of the molding of the outer shell 230. The first inner molded part 1311 is inserted into the second inner molded part 1321 for stamping, thereby accurately forming the center column 220, thereby ensuring the accuracy of the shape, size and position of the center column 220.

[0048] like Figure 2As shown, the lower die assembly 130 includes a first lower die base 1303 fixedly connected to the first molded part 1301 and a second lower die base 1304 fixedly connected to the second molded part 1302. The first molded part 1301 and the second molded part 1302 can be stably mounted on the lower die assembly 130 to ensure the smooth progress of the stamping process. The first lower die base 1303 and the second lower die base 1304 are respectively used to stably support the first molded part 1301 and the second molded part 1302 to ensure their position accuracy during the stamping process.

[0049] like Figure 7 As shown, a plug-in portion 1340 adapted to the first molded part 1301 is provided on one side of the second lower mold base 1304 facing the first molded part 1301, so that the first molded part 1301 can be inserted into the second lower mold base 1304 and can slide in the second lower mold base 1304. The design of the plug-in portion 1340 enables the first molded part 1301 to be adjusted in height relative to the second molded part 1302, thereby meeting the stamping requirements of magnetic embryos 200 of different sizes.

[0050] Specifically, the insertion portion 1340 includes an insertion hole 1341 that penetrates the second lower die base 1304 and a slot 1342 that is arranged around the outside of the insertion hole 1341. The insertion hole 1341 is adapted to the first inner molded part 1311, and the first inner molded part 1311 passes through it, so as to ensure the position stability of the first inner molded part 1311 during the stamping process. The slot 1342 also penetrates the second lower die base 1304 and is adapted to the first outer molded part 1312, and the first outer molded part 1312 passes through it, further ensuring that the first molded part 1301 can be stably inserted into the second lower die base 1304 and maintain the correct position during the stamping process.

[0051] Next, the die-casting method of the magnetic embryo 200 in this embodiment is described in detail with reference to the accompanying drawings.

[0052] like Figure 4 As shown, the die-casting method of the magnetic embryo 200 mainly includes the following steps:

[0053] Step S1: Insert the first molded part 1301 into the second molded part 1302 to form a tightly combined molded assembly. This combination is pressed upward from the punching hole 1101 into the middle mold assembly 110 to ensure that the first molded part 1301, the second molded part 1302 and other parts of the die-casting mold 100 are accurately aligned. In this step, the first molded part 1301 and the second molded part 1302 are combined to form a cavity that matches the shape of the magnetic embryo 200.

[0054] When the first molded part 1301 and the second molded part 1302 are combined and enter the punching hole 1101 and arrive at a set position, the powder material is fed into the punching hole 1101 by the powder feeding device.

[0055] Step S2: Align the upper punch 1201 of the upper die assembly 120 with the punch hole 1101 and move downward from the punch hole 1101 into the middle die assembly 110. In this step, the upper punch 1201, the first molding part 1301 and the second molding part 1302 form a closed cavity together to prepare for subsequent stamping.

[0056] Step S3: Adjust the relative height between the first molded part 1301 and the second molded part 1302, and the depth of the upper punch 1201 entering the punch hole 1101. In this embodiment, since the first molded part 1301 can slide in the insertion portion 1340 of the second lower mold base 1304, the relative height between the first molded part 1301 and the second molded part 1302 can be changed by adjusting the sliding position of the first molded part 1301. At the same time, the depth of the upper punch 1201 entering the punch hole 1101 is changed by adjusting the position of the upper mold assembly 120 relative to the middle mold assembly 110. This step can be adjusted according to the actual required size of the magnetic embryo 200 to ensure that the magnetic embryo 200 formed by stamping has the required size and shape.

[0057] Step S4: In the middle mold assembly 110, the filled powder material is efficiently extruded. During the extrusion process, the powder material is subjected to pressure from the first molded part 1301, the second molded part 1302 and the upper punch 1201, and gradually forms a central column 220 and a shell 230 surrounding the outside of the central column 220 between the first molded part 1301 and the second molded part 1302, and forms a base plate 210 between the upper mold assembly 120 and the middle mold assembly 110. The base plate 210, the central column 220 and the shell 230 are tightly combined during the extrusion process to form an integrated magnetic embryo 200, thereby improving the structural strength and stability of the magnetic embryo 200. In this step, the powder material is compacted and filled into the cavity by applying sufficient pressure, thereby forming a magnetic embryo 200 with a desired shape.

[0058] At this point, the die-casting process of the magnetic embryo 200 is completed.

[0059] After the magnetic embryo 200 is stamped, the lower mold assembly 130 moves toward the upper mold assembly 120 to remove the magnetic embryo 200 from the middle mold assembly 110. Then, the magnetic embryo 200 can be taken out of the mold for subsequent treatment or processing. The demolding process needs to be smooth and rapid to avoid any damage to the magnetic embryo 200.

[0060] In summary, through the die-casting mold 100 and the die-casting method of the magnetic embryo 200 of the present invention, the magnetic embryo 200 having the substrate 210, the central column 220 and the shell 230 can be integrally die-casted. The shell 230 is arranged around the outside of the central column 220, which effectively protects the central column 220 and prevents the central column 220 from being broken and damaged during the molding and transportation of the magnetic embryo 200. At the same time, by adjusting the relative height between the first molded part 1301 and the second molded part 1302 and the depth of the upper stamping part 1201 entering the stamping hole 1101, the stamping requirements of magnetic embryos 200 of different sizes can be met, which has high practicality and flexibility.

[0061] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A die-casting mold for integrally stamping a magnetic embryo, the magnetic embryo comprising a substrate, a central column erected on the substrate, and a shell surrounding the outer side of the central column, characterized in that: The die-casting mold includes: an upper mold assembly, a middle mold assembly and a lower mold assembly, wherein the upper mold assembly and the lower mold assembly are respectively arranged on the upper and lower sides of the middle mold assembly and can move relative to the middle mold assembly; the middle mold assembly is provided with a punching hole which passes through from top to bottom; the upper mold assembly includes an upper punching piece adapted to the punching hole, wherein the upper punching piece is configured to be able to enter the punching hole to punch out the substrate of the magnetic embryo; the lower mold assembly includes a first molding piece and a second molding piece adapted to the punching hole, wherein the first molding piece and the second molding piece are combined to enter the punching hole to punch out the center column and the outer shell of the magnetic embryo.

2. The die casting mold according to claim 1, characterized in that: The first molded part includes a first inner molded part and a first outer molded part which is U-shaped and arranged outside the first inner molded part, and a gap is formed between the first inner molded part and the first outer molded part.

3. The die casting mold according to claim 2, characterized in that: The first inner molded part is a square column, and the first outer molded part is arranged on the outer sides of three outer wall surfaces of the first inner molded part.

4. The die-casting mold according to claim 2, characterized in that: The second molded part includes a second outer molded part adapted to the first outer molded part, and a second inner molded part adapted to the first inner molded part, the second outer molded part is configured to be inserted into a gap between the first inner molded part and the first outer molded part to stamp out the outer shell, and the first inner molded part is configured to be inserted into the second inner molded part to stamp out the center column.

5. The die casting mold according to claim 4, characterized in that: The second inner molded part is a through groove opened at the middle position of the second outer molded part for the first inner molded part to be inserted.

6. The die casting mold according to claim 2, characterized in that: The lower mold assembly includes a first lower mold base fixedly connected to the first molding part and a second lower mold base fixedly connected to the second molding part; wherein, the second lower mold base is provided with a plug-in portion adapted to the first molding part on one side facing the first molding part, so that the first molding part can be inserted into the second lower mold base and slide in the second lower mold base.

7. The die-casting mold according to claim 6, characterized in that: The inserting portion includes an insert hole that passes through the second lower mold base and a slot that is surrounded by the outside of the insert hole. The insert hole is adapted to the first inner molded part for the first inner molded part to pass through. The slot also passes through the second lower mold base and is adapted to the first outer molded part for the first outer molded part to pass through.

8. The die casting mold according to claim 1, characterized in that: The middle die assembly is provided with at least two punching holes.

9. A die-casting method for a magnetic embryo, applied to the die-casting mold according to any one of claims 1 to 8, characterized in that: The main steps include: Insert the first molded part into the second molded part, and press them upward from the punching hole into the middle mold assembly; Align the upper punch of the upper die assembly with the punch hole and insert it downward from the punch hole into the middle die assembly; Adjusting the relative height between the first molded part and the second molded part, and the depth of the upper punching part entering the punching hole; The powder material is extruded in the middle mold assembly to form a center column and a shell surrounding the outside of the center column between the first molded part and the second molded part, and a base plate is formed between the upper mold assembly and the middle mold assembly. The base plate, the center column and the shell are stamped and formed as a whole to form a magnetic embryo.

10. The die-casting method of magnetic embryo according to claim 9, characterized in that: After the magnetic embryo is stamped and formed, the lower die assembly moves toward the upper die assembly to remove the magnetic embryo from the middle die assembly.

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