CN117140821B - Annular magnetic sheet forming device and forming method - Google Patents
Annular magnetic sheet forming device and forming method Download PDFInfo
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- CN117140821B CN117140821B CN202311432879.2A CN202311432879A CN117140821B CN 117140821 B CN117140821 B CN 117140821B CN 202311432879 A CN202311432879 A CN 202311432879A CN 117140821 B CN117140821 B CN 117140821B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 74
- 238000000465 moulding Methods 0.000 claims abstract description 61
- 238000002360 preparation method Methods 0.000 claims abstract description 56
- 238000007493 shaping process Methods 0.000 abstract description 8
- 238000010030 laminating Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/34—Feeding the material to the mould or the compression means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
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- Mechanical Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The present disclosure relates to an annular magnetic sheet molding device and molding method, the molding device including: the female die module is provided with a cavity for placing the magnetic stripe; and a punch module including two punches for extruding the magnetic strip within the cavity, wherein the cavity includes: the forming section is configured into a cylindrical inner cavity, and the inner diameter of the forming section is matched with the outer diameter of the punch; and the material preparation section is provided with a conical inner cavity, the conical inner cavity is gradually expanded from one end of the forming section towards a direction away from the forming section, and the punch module can generate relative motion with the female die module in the cavity so as to move the magnetic strip which is curled and compressed into a ring with a specified size in the material preparation section into the forming section through the relative motion and squeeze the magnetic strip through the punch module. The input of magnetic stripe can be from the section of prepareeing materials gradually to shaping section, guarantees that the magnetic stripe can be evenly with cylindrical inner chamber laminating for the magnetic sheet after the shaping is consistent in the circumferencial direction performance, avoids appearing the circumstances of local fracture.
Description
Technical Field
The disclosure relates to the technical field of magnetic sheet forming, in particular to an annular magnetic sheet forming device and an annular magnetic sheet forming method.
Background
The soft magnetic rubber magnetic ring is usually manufactured by pressing into a sheet and then punching the ring, in the mode, only the material of the ring part is utilized, and other parts have larger areas and are not used, so that the material is wasted. To solve the problem, the way to directly press the rubber magnetic strip into the ring is a new direction of development, and the way basically has no material waste.
In the related art, a magnetic strip is input into a straight barrel-shaped female die, and then is extruded into an annular magnetic sheet in the female die through an upper punch and a lower punch. Moreover, because the head end and the tail end of the magnetic strip have certain rigidity and lack of external force for bending the magnetic strip, gaps which are not completely closed and are caused by partial contact part fracture appear at the head end and the tail end, and the circumferential performance of the magnetic ring also has larger fluctuation after the magnetic strip is pressed. In addition, due to the softer material of the magnetic strip, dislocation rather than circular ring shape may occur when the magnetic strip is put into the female die, and in this case, extrusion of the magnetic strip may lead to non-uniform circumferential thickness of the molded magnetic strip.
Disclosure of Invention
An object of the present disclosure is to provide an annular magnetic sheet molding apparatus and molding method to at least partially solve the problems in the related art.
In order to achieve the above object, the present disclosure provides an annular magnetic sheet molding apparatus including: the female die module is provided with a cavity for placing the magnetic stripe; and a punch module comprising two punches for extruding the magnetic strip within the cavity, wherein the cavity comprises: a forming section configured as a cylindrical cavity with an inner diameter matching an outer diameter of the punch; and the material preparation section is provided with a conical inner cavity, the conical inner cavity is gradually expanded from one end of the forming section towards a direction away from the forming section, and the punch module can generate relative motion with the female die module in the cavity so as to move the magnetic strip coiled into a ring in the material preparation section into the forming section through the relative motion and squeeze the magnetic strip through the punch module.
Optionally, the annular magnetic sheet forming device comprises a core rod capable of being coaxially inserted into the cavity, the punch module is provided with a hollowed-out structure, and the inner diameter of the hollowed-out structure is matched with the outer diameter of the core rod so as to be matched and spliced with the core rod when the annular magnetic sheet forming device is inserted into the cavity.
Optionally, a cone tip is configured at one end of the mandrel near the stock section for receiving the pre-rolled magnetic strip.
Optionally, the annular magnetic sheet forming device comprises a rotating device, wherein the rotating device is used for coaxially extending into the material preparation section so as to curl the magnetic strips input into the material preparation section into a ring through rotating motion.
Optionally, the rotating device comprises a core rod capable of being coaxially inserted into the material preparation section and a motor for driving the core rod to rotate, wherein in the radial direction of the cavity, the interval between the core rod and the material preparation section is matched with the dimension of the magnetic strip along the radial direction of the cavity.
Optionally, the annular magnetic sheet forming device comprises a feeding channel leading to the material preparation section so as to input the magnetic strip to the material preparation section, and the extending direction of the feeding channel is the circumferential tangential direction of the material preparation section.
Optionally, the feeding channel is formed in the side wall of the female die module, or the feeding channel is arranged outside the female die module.
Optionally, the feeding channel is configured to: the inclination angle of the circumferential surface of the cavity body towards the first direction and the second direction is not more than 15 degrees, wherein the first direction is the expanding direction of the conical inner cavity, and the second direction is the contracting direction of the conical inner cavity.
Optionally, the feeding channel is configured to: an inclination angle with respect to a circumferential surface of the cavity in the first direction is not more than 5 degrees, and an inclination angle in the second direction is not more than 10 degrees.
Optionally, the magnetic sheet forming device comprises a strip pushing device for pushing the magnetic strip into the material preparation section along a preset direction in the material feeding channel.
Optionally, the stock section includes a feeding portion for inputting a magnetic strip and a looping portion engaged between the feeding portion and the shaping section, an inner cavity of the feeding portion is configured as a cylinder or a taper gradually expanding in a direction away from the looping portion, the looping portion is configured as the taper inner cavity, and the magnetic strip can be moved from the feeding portion to the looping portion to loop by the relative movement.
Optionally, the feeding portion and the looping portion are configured as an integral structure, or the feeding portion and the looping portion are configured as a split structure.
Optionally, the inner diameter D of the position where the feeding part is connected with the looping part 0 Is configured to: d+W>D 0 >D1, wherein D represents the outer diameter of the punch, W represents the width of the magnetic strip along the radial direction of the cavity, and D 1 Representing the inner diameter of the profiled section.
Optionally, the inner diameter D of the position where the feeding part is connected with the looping part 0 Is configured to: d+W>D 0 >D 1 +W/2。
Optionally, the material preparation section and the forming section are configured into a split structure, the magnetic sheet forming device comprises a feeding sleeve and a feeding pressure head, the feeding sleeve is used for being combined with the material preparation section, and the feeding pressure head is used for pushing the magnetic strip in the feeding sleeve into the material preparation section.
According to a second aspect of embodiments of the present disclosure, there is provided a method of forming an annular magnetic sheet, applied to an annular magnetic sheet forming apparatus provided by the present disclosure, the method including: inputting a magnetic stripe of a preset length into the stock section and causing the magnetic stripe to be rolled Qu Chenghuan within the stock section; moving at least one of the punch module and the die module such that the magnetic strip moves from the stock section to the forming section; and extruding the magnetic strip within the forming section.
Through above-mentioned technical scheme, set up the shaping section that has the material section and construct for cylindrical inner chamber of preparing of toper inner chamber at the inner chamber of female die module for the input of magnetic stripe can be gradually from the material section of preparing to the shaping section, guarantees that the magnetic stripe that enters into in the shaping section can be even with cylindrical inner chamber laminating and present regular ring shape, thereby makes the magnetic sheet after the shaping in the circumferencial direction performance unanimity, avoids appearing the circumstances of local fracture, guarantees product quality.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
FIG. 1 is a schematic cut-away view of a female mold module provided in an exemplary embodiment of the present disclosure;
fig. 2 is an enlarged view of a portion a in fig. 1;
FIG. 3 is a schematic cut-away view of a female mold module provided in accordance with another exemplary embodiment of the present disclosure;
FIG. 4 is a schematic illustration of a magnetic stripe input feed provided in an exemplary embodiment of the present disclosure;
FIG. 5 is a schematic illustration of a punch moving to both sides of a magnetic stripe provided in an exemplary embodiment of the present disclosure;
FIG. 6 is a schematic illustration of a magnetic stripe being moved to a looped portion provided by an exemplary embodiment of the present disclosure;
FIG. 7 is a schematic illustration of a magnetic stripe being moved to a forming section provided in accordance with an exemplary embodiment of the present disclosure;
FIG. 8 is a schematic illustration of a magnetic stripe being extruded into a magnetic sheet provided in accordance with an exemplary embodiment of the present disclosure;
FIG. 9 is a variation of a magnetic stripe becoming a magnetic sheet provided in an exemplary embodiment of the present disclosure;
FIG. 10 is a partial schematic view of FIG. 5;
FIG. 11 is a schematic cut-away view of a female mold module provided in an exemplary embodiment of the present disclosure;
FIG. 12 is a schematic view of a portion of a structure of a molding apparatus provided in an exemplary embodiment of the present disclosure;
FIG. 13 is a schematic illustration of a molding process provided by an exemplary embodiment of the present disclosure;
FIG. 14 is a partial schematic view of a molding apparatus provided in an exemplary embodiment of the present disclosure;
FIG. 15 is a partial schematic view of a molding apparatus provided in an exemplary embodiment of the present disclosure;
FIG. 16 is a flowchart of a magnetic sheet molding method according to an exemplary embodiment of the present disclosure;
fig. 17 is a flowchart of a magnetic sheet molding method according to an exemplary embodiment of the present disclosure.
Description of the reference numerals
10-magnetic stripes, 20-magnetic sheets, 1-female die modules, 11-forming sections, 12-material preparation sections, 121-material feeding parts, 122-annular parts, 2-punch modules, 21-hollows, 3-core rods, 31-cone tips, 32-motors, 321-motor output shafts, 4-material feeding channels, 51-material feeding sleeves, 52-material feeding pressure heads, 53-driving cylinders and 54-driving rods.
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
In the present disclosure, unless otherwise stated, terms such as "upper and lower" are defined according to the usage habit of the magnetic sheet molding apparatus, and specifically refer to the directions of the drawing sheets of fig. 1 to 8, and "inner and outer" are defined according to the own contours of the respective parts. The terms "first," "second," and the like, as used in this disclosure, are used for distinguishing one element from another and not necessarily for the order or importance. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated.
The embodiment of the disclosure provides an annular magnetic sheet forming device, which can press a rubber magnetic strip into a magnetic sheet, such as a magnetic sheet which is formed by pressing a magnetic strip which surrounds an annular shape into an annular shape. Referring to fig. 4 to 8, the molding apparatus includes a female mold block 1 and a punch block 2, wherein the female mold block 1 is formed with a cavity for placing the magnetic stripe 10, the magnetic stripe 10 may be placed in the cavity by any means for one week, an annular structure is formed before molding, and the punch block 2 includes two punches for pressing the magnetic stripe 10 in the cavity to press the magnetic stripe 10 into the magnetic sheet 20.
Wherein, referring to fig. 1, the cavity comprises a molding section 11 and a material preparation section 12. The forming section 11 is configured as a cylindrical inner cavity, and the inner diameter is matched with the outer diameter of the punch, namely, the forming section and the punch can realize fit; the stock section 12 has a conical cavity which diverges from one end of the forming section 11 in a direction away from the forming section 11, i.e. in the direction of the drawing plane shown in fig. 1, the conical cavity diverges from bottom to top. The punch module 2 can move relatively to the die module 1 in the cavity, such as up and down along the drawing plane, so that the magnetic strips 10 curled into rings in the material preparation section 12 can be moved into the forming section 11 by the relative movement to be extruded by the punch module 2, and the process of fig. 5 to 7 is referred to. When the magnetic stripe 10 is input into the stock section 12, the magnetic stripe 10 may have a partial area sinking due to gravity, and may have a vertical dislocation after the magnetic stripe 10 is input into the stock section 12 due to its soft rubber material. Therefore, the magnetic strip 10 directly input into the preparation section 12 will not keep a regular circular shape, and, in order to reserve space for inputting the magnetic strip, the length of the magnetic strip 10 cannot be completely consistent with the perimeter of the inner cavity of the input position of the preparation section 12, so that gaps are left at the head and tail ends of the input magnetic strip 10, and since the preparation section 12 has a conical inner cavity connected with the forming section 11, the gaps at the head and tail ends of the magnetic strip 10 can be gradually eliminated and regular into a circular shape in the process that the magnetic strip 10 moves from top to bottom in the cavity, until the magnetic strip 10 is pushed into the forming section 11, the circular magnetic strip 10 which is matched with the forming section 11 and clings to the cylindrical inner cavity can be displayed, and thus, the circular magnetic strip 20 can be formed by extrusion of the punch module 2.
The magnetic strips of different types were processed and molded by the magnetic sheet molding apparatus provided in the examples of the present disclosure, to obtain magnetic sheet size data and magnetic sheet performance data as shown in table 1 below. The outer diameter of the molding section 11 of the magnetic sheet molding device is 54.65mm, the size of the magnetic strip is 169.1mm in linear length (namely, the perimeter after being input into the material preparation section 12), the width along the radial direction of the inner cavity is 1.4mm, and the height is 1.8mm. Example 1-example 3 magnetic strips of three different compositions were respectively selected as blanks and formed by the magnetic sheet forming device in the examples of the present disclosure, and comparative examples 1-3 were each formed by manually placing the same magnetic strips as in examples 1-3 into the magnetic strips by a straight-tube type magnetic sheet forming device in the prior art. The circumferentially 8 points in table 1 are randomly extracted 8 points.
Table 1:
it can be seen from table 1 above that the magnetic sheet formed by the magnetic sheet forming device provided by the embodiment of the present disclosure has a uniform thickness dimension on the circumference, and can realize uniform compression of the magnetic stripe on the circumference, so that the density distribution of the pressed magnetic sheet on the circumference is uniform, and the tensile strength is high.
Through the technical scheme, the inner cavity of the female die module 1 is provided with the material preparation section 12 with the conical inner cavity and the forming section 11 with the cylindrical inner cavity, so that the input of the magnetic strip 10 can be gradually led into the forming section 11 from the material preparation section 12, the magnetic strip 10 entering into the forming section 11 can be uniformly attached to the cylindrical inner cavity to be in a regular circular shape, the formed magnetic sheet 20 is enabled to be consistent in performance in the circumferential direction, the situation of local fracture is avoided, and the product quality is ensured.
Referring to fig. 1 and 3, the stock section 12 may include a feeding portion 121 for feeding the magnetic stripe 10 and a looping portion 122 engaged between the feeding portion 121 and the forming section 11, and the looping portion 122 may be configured as a tapered lumen, the magnetic stripe 10 being capable of being moved from the feeding portion 121 to the looping portion 122 to loop by a relative motion. When the magnetic stripe 10 is input into the feeding portion 121, the shape of the input magnetic stripe 10 will not be a regular circular ring shape, but will be a shape shown in the first state in fig. 13, because the magnetic stripe 10 is soft and under the action of gravity. At this time, the magnetic stripe 10 can be gradually regulated into a circular ring shape shown in the second state of fig. 13 by the relative movement (for example, two punch movements of the punch module 2) between the punch module 2 and the die module 1, so that the magnetic stripe 10 can be conveniently extruded in a regulated shape, and the performance of the extruded magnetic stripe is ensured.
In the embodiment of the present disclosure, referring to fig. 2, since the loop forming portion 122 may be regular in magnetic stripe shape, the shape of the feeding portion 121 is not limited only, for example, the inner cavity of the feeding portion 121 may be configured in a cylindrical shape (the feeding portion 121 is shown by a dotted line in fig. 2) or a tapered shape (the feeding portion 121 is shown by a solid line in fig. 2) gradually expanding in a direction away from the loop forming portion 122. Where it is tapered, the tapered bevel may be coincident with the loop formation 122.
In one embodiment, as shown in fig. 1, the feeding portion 121 and the looping portion 122 may be configured as a unitary structure. Alternatively, in an embodiment, as shown in fig. 3, the feeding portion 121 and the looping portion 122 may be configured as a split structure, so that the feeding and looping processes may be implemented at different stations, thereby improving production efficiency.
In the disclosed embodiment, with reference to FIG. 10, the inner diameter D of the preparation segment 12 at a predetermined location 0 Can be configured to: d+W>D 0 >D 1 Where D denotes the outer diameter of the punch, W denotes the width of the magnetic stripe 10 in the radial direction of the cavity, and D 1 Showing the inner diameter of the profiled section 11. Within this size range, it is ensured that the punch can effectively contact the magnetic strip in the cavity, for example that the upper ram can press against the magnetic strip 10 in the stock section 12, ensuring that the magnetic strip can be pressed against the negative mould module 1 for a relative movement. The preset position of the stock section 12 may be a position where the feeding portion 121 is connected to the looping portion 122.
Further, an inner diameter D of the position where the feeding portion 121 meets the looping portion 122 0 Can be configured to: d+W>D 0 >D 1 +W/2. In the size range, the fit of all parts can be better ensured, and the interference between the punch module 2 and the inner wall of the material preparation section 12 is avoided.
In one embodiment, the stock section 12 may be configured as a split structure with the forming section 11. For example, when the stock section 12 includes the feeding portion 121 and the looping portion 122, the feeding portion 121 and the looping portion 122 may be of an integral structure, and the whole stock section 12 formed by the feeding portion 121 and the looping portion may be of a split structure with the molding section 11. Through split type structure's structure, can make the material preparation and shaping go on in different stations to improve production efficiency.
In the embodiment of the disclosure, when the female mold module 1 is configured as a split structure as the material preparation section 12 and the molding section 11, referring to fig. 14, the magnetic sheet molding apparatus may include a feeding sleeve 51 and a feeding ram 52, the feeding sleeve 51 is used to be engaged with the material preparation section 12 (when the material preparation section 12 includes a material inlet portion 121 and a loop forming portion 122, and the material inlet portion 121 and the loop forming portion 122 are in a split structure, the feeding sleeve 51 is used to be engaged with the material inlet portion 121 of the material preparation section 12), and the feeding ram 52 is used to push the magnetic stripe 10 in the feeding sleeve 51 into the material preparation section 12. The feed ram 52 may be driven by a drive cylinder 53 and a drive rod 54 to enable automated operation, although manual operation is also possible, as is the punch module 2 in the disclosed embodiment.
In order to facilitate limiting the position of the magnetic strip 10 in the female die block 1, referring to fig. 4, the magnetic strip forming device may include a core rod 3 coaxially inserted into the cavity, and when the magnetic strip 10 is input, the magnetic strip 10 may be input into a space between the core rod 3 and the female die block 1, so as to avoid unnecessary deformation of the magnetic strip 10. The punch module 2 may be provided with a hollowed structure 21, the inside diameter of the hollowed structure 21 is matched with the outside diameter of the core rod 3 so as to be matched and inserted with the core rod 3 when being inserted into the cavity, interference between the hollowed structure and the core rod is avoided, and the size range of the pressed magnetic sheet 20 can be limited by the limitation of the core rod 3 when the magnetic strip 10 is extruded, and the method can be particularly seen with reference to fig. 8.
As shown in fig. 4, the end of the mandrel 3 adjacent to the stock section 12 may be configured with a tapered tip 31 for receiving a pre-rolled magnetic strip. For example, the linear magnetic stripe can be pre-rolled into a spiral shape through a spiral device, then the pre-rolled magnetic stripe is moved to the upper end of the conical tip part 31 to be placed down through a sucker manipulator, and the spiral magnetic stripe slides into the material preparation section 12 in the inner cavity of the female die module 1 after being guided by the inclination of the conical tip part 31, so that the next operation is performed.
In some embodiments, the forming device may include a rotating device for coaxially extending into the stock section 12, and crimping the magnetic stripe inputted therein into a ring in the stock section 12 by a force generated by a rotating motion of the rotating device, and then moving the looped magnetic stripe 10 into the forming section 11 by the punch module 2 for ring-shaped magnetic sheets. The magnetic strips are rolled into the ring shape through the rotating device, so that the magnetic strips can move in the conical inner cavity in the ring shape, and the situation that the ring shape is uneven due to dislocation of the magnetic strips is further avoided.
Referring to fig. 15, the rotating device may include the above-described core rod 3 and a motor 32 for driving the core rod 3 to rotate, and the motor 32 may be connected to the core rod 3 through a motor output shaft 321. In the radial direction of the cavity, the interval between the core rod 3 and the material preparation section 12 is matched with the radial dimension of the magnetic strip 10 along the cavity, so that the magnetic strip 10 can be just stuck between the inner wall of the material preparation section 12 and the outer wall of the core rod 3, and the magnetic strip 10 can be driven to curl into a ring shape around the periphery when the core rod 3 rotates, so that the magnetic strip is used for subsequent procedures.
In the embodiments of the present disclosure, the feeding manner is not limited to the above manner, and in some embodiments, the magnetic sheet forming apparatus may include the feeding channel 4 leading to the stock section 12, so as to input the magnetic stripe 10 into the stock section 12, that is, directly input the linear magnetic stripe into the stock section 12, without pre-winding. The extending direction of the feeding channel 4 is the circumferential tangential direction of the material preparation section 12, so that the linear magnetic strips do not prop against the cavity wall of the female die module 1 or the core rod 3 to cause deformation or obstruction when entering the material preparation section 12. In the case of the above-described construction of the mandrel 3, the input radius thereof may be limited such that the circumferential edge thereof is located at the gap between the mandrel 3 and the stock section 12.
As shown by way of example in fig. 11, the feed channel 4 can be provided in the side wall of the female mould block 1, and a linear magnetic strip 10 can be fed from the outside of the female mould block 1 via the feed channel 4, which strip, after entering the feed section 12, can be curled under the limitation of its circumferential shape.
In some embodiments, as shown in fig. 12, the feed channel 4 may be arranged outside the female mould block 1. For example, the magnetic strip is gradually pushed in close proximity to the inner wall of the stock section 12, causing it to curl along the inner wall of the stock section 12.
In order to ensure that the input position of the magnetic stripe is suitable, the falling down of too many is inconvenient to loop and the entering of the magnetic stripe blocking the subsequent magnetic stripe is avoided, the feeding channel 4 can be configured as: the inclination angle a with respect to the circumferential surface of the cavity (i.e., the horizontal direction of the drawing in fig. 11) is not more than 15 degrees in both a first direction (the bottom-to-top direction in the drawing in fig. 11) which is the expansion direction of the tapered inner cavity and a second direction (the top-to-bottom direction in the drawing in fig. 11) which is the contraction direction of the tapered inner cavity.
Further, the feed channel 4 may be configured to: the inclination angle of the circumferential surface of the cavity towards the first direction is not more than 5 degrees, so that the magnetic strip 10 is prevented from falling too much to influence a subsequent looping path because the magnetic strip is prevented from being blocked at the position of the feeding channel 4 after being input by gravity, and the inclination angle of the cavity towards the second direction is not more than 10 degrees.
In order to ensure the stable input process of the magnetic stripe 10, the magnetic stripe forming device may include a stripe pushing device for pushing the magnetic stripe 10 into the stock preparation section 12 along a preset direction in the feeding channel 4, and the stripe pushing device may be a rod, or may be other magnetic stripes, etc. The implementation manner along the preset direction may be that a guiding structure with the same angle is arranged in the extending direction of the feeding channel 4, and the pushing strip may be arranged on the guiding structure to push the magnetic stripe into the feeding channel 4.
In a second aspect of the embodiments of the present disclosure, there is provided a magnetic sheet molding method, applied to the above magnetic sheet molding apparatus, referring to fig. 16, the method including:
in step 101, inputting a magnetic stripe 10 with a preset length into the stock section 12, and making the magnetic stripe 10 curl into a loop in the stock section 12, for example, curl into a loop shape with a loose connection or a reserved gap at the end-to-end, the preset length can be preset according to the circumference of the magnetic stripe to be manufactured, and the length is not greater than the circumference inner diameter of the stock section 12 for inputting the preset length, so that the gap is reserved at the end-to-end, the reserved gap can reserve space for the subsequent looping process with the end-to-end tight connection of the magnetic stripe and reserve a matching gap for the magnetic stripe 10 to be input into the feeding part 121;
at step 102, at least one of the punch module 2 and the die module 1 is moved, for example, the punch module 2 is kept at two sides of the magnetic strip 10, only the die module 1 is moved, or vice versa, or the punch module 2 and the die module 1 are also moved simultaneously, so that the magnetic strip 10 can be moved from the material preparation section 12 to the forming section 11, during the moving process, the magnetic strip 10 can gradually form a ring shape with the two ends tightly connected under the action of the conical inner cavity of the material preparation section 12, after being formed into a ring, the magnetic strip 10 is pushed into the cylindrical inner cavity of the forming section 11, at this time, the gap between the head and the tail of the magnetic strip 10 is eliminated, and the head and the tail are just jointed without overlapping; and
in step 103, the magnetic strip 10 is pressed in the forming section 11, for example by moving both the upper and lower punches simultaneously or by moving one of the two punches. After the extrusion is completed, the upper punch can be removed, and the relative position of the lower punch and the female die module 1 is moved, so that the lower punch leaks upwards out of the female die module 1, the magnetic sheet 20 is pushed out from the upper end, and the output and the transfer of the magnetic sheet 20 are facilitated.
Wherein, in the process of moving the magnetic stripe 10 from the material preparation section 12 to the forming section 11, the method comprises the following steps: the distance between the two punches at two sides of the magnetic stripe 10 is set to be not smaller than the height of the magnetic stripe 10 and not larger than twice the height of the magnetic stripe 10, so that unexpected deformation of the magnetic stripe 10 caused by the fact that the punches squeeze the magnetic stripe 10 in the material preparation section 12 can be avoided, and the situation that the magnetic stripes are staggered up and down to cross in the moving process due to the fact that the reserved distance between the punches is too large can be avoided.
When the feeding portion 121 of the stock section 12 is separated from the molding section 11 and the annular portion 122 is formed integrally with the molding section 11, or when the whole stock section 12 is formed integrally with the molding section 11, the molding method includes, with reference to fig. 17, in the case where such a separated structure exists:
in step 1011, the magnetic stripe 10 with the preset length is sent to the part of the material preparation section 12 separated from the forming section 11 at the first station, specifically, the material preparation section 12 may be docked with the material preparation sleeve 51 by providing a material feeding device as shown in fig. 14 at the first station, for example, including the material feeding sleeve 51 and the material feeding ram 52, and the magnetic stripe 10 in the material feeding sleeve 51 is pushed by the material feeding ram 52 to be pushed into the material preparation section 12, where the material feeding manner of the magnetic stripe 10 in the material feeding sleeve 51 may be achieved by the material feeding manner described above, and not repeated herein; when the feeding portion 121 of the material preparation section 12 is separated from the forming section 11 and the annular portion 122 and the forming section 11 are in an integral structure, the portion of the material preparation section 12 separated from the forming section 11 refers to the feeding portion 121; when the whole material preparation section 12 and the forming section 11 are all configured as a split structure, the part of the material preparation section 12 separated from the forming section 11 refers to the whole material preparation section 12, and the material preparation section 12 at least comprises a ring forming part 122 configured as a conical inner cavity, and can further comprise a feeding part 121 on the basis; and
at step 1021, the separated portion of the stock section 12 and the forming section 11 is moved to a second station, as shown in fig. 3, where the stock section 12 is docked with the forming section 11, such as directly or through a loop 122 formed above the forming section 11, and where the magnetic stripe 10 is fed into the forming section 11; and then extrusion is performed through step 103 described above.
In the embodiment of the disclosure, the material preparation section 12 of the female die module 1 is partially or wholly separated from the molding section 11, so that feeding and molding can be divided into two stations, the work of the two stations is not interfered with each other, the input step of the magnetic stripe 10 is performed at the first station, the molding step of the magnetic stripe 10 is performed at the second station, and the two stations are parallel, thereby effectively improving molding efficiency.
The molding process of the magnetic sheet molding apparatus in the embodiment of the present disclosure will be described below with reference to the above-described structure and fig. 4 to 9 and 13. First, referring to fig. 4, the magnetic stripe 10 is input into the preparation section 12 of the cavity, specifically, the feeding portion 121 of the preparation section 12, where the magnetic stripe 10 may be in an up-down staggered state as shown in the first state diagram in fig. 13, and the feeding manner may be a manner of pre-winding into a spiral shape by a spiral device or pre-winding into a ring shape by a rotation device as described above. In a second step, referring to fig. 5, the upper and lower punches of the punch module 2 are moved to both sides of the magnet strip 10, wherein the lower punches may be extended into the cavity of the die module 1 before the magnet strip 10 is fed in. Third, referring to the second state diagram in fig. 6 and 13, the punch module 2 or the die module 1 is moved so that the magnetic stripe 10 enters the looping portion 122 (shown in fig. 1) of the stock material section 12 to be rounded into a loop shape suitable for molding. Fourth, with reference to the third state diagram in fig. 7 and 13, the punch module 2 or the die module 1 is moved further so that the magnetic strip 10 enters the forming section 11. Fifth, referring to the fourth state diagram of fig. 8 and 13, at least one of the two punches is moved to press the magnetic stripe 10, thereby forming the magnetic sheet 20. Fifth, referring to the fifth state diagram of fig. 13, the upper punch is removed after molding, and the female die block 1 is moved downward or the upper punch is moved upward, so that the magnetic sheet 20 leaks out to be easily removed. In the embodiment of the present disclosure, the operation of moving either the die block 1 or the punch block 2 may be configured to move the die block 1 in a manual or automatic manner. It should be noted that the molding process is only an exemplary illustration described for one embodiment of the present disclosure, and is not intended to limit the present disclosure, and the molding process may be adaptively adjusted according to the specific configuration of the molding apparatus described above, which is not described here.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (15)
1. An annular magnetic sheet molding device, characterized by comprising:
the female die module is provided with a cavity for placing the magnetic stripe; and
a punch module comprising two punches for extruding the magnetic strips in the cavity,
wherein, the cavity includes:
a forming section configured as a cylindrical cavity with an inner diameter matching an outer diameter of the punch; and
a stock section having a tapered inner cavity which diverges from one end of the molding section in a direction away from the molding section, the stock section including a feed portion for feeding a magnetic stripe and a looping portion joined between the feed portion and the molding section, the inner cavity of the feed portion being configured in a cylindrical shape or a tapered shape which diverges in a direction away from the looping portion, the looping portion being configured as the tapered inner cavity, the magnetic stripe being movable from the feed portion to the looping portion by a relative motion,
the punch module can generate relative motion with the female die module in the cavity, so that the magnetic strips coiled into rings in the material preparation section can be moved into the forming section through the relative motion to be extruded through the punch module.
2. The annular magnetic sheet molding device according to claim 1, wherein the annular magnetic sheet molding device comprises a core rod coaxially insertable into the cavity, and the punch module is provided with a hollowed-out structure having an inner diameter matching an outer diameter of the core rod so as to be fittingly inserted with the core rod when inserted into the cavity.
3. The annular magnetic sheet molding apparatus as claimed in claim 2, wherein an end of the core rod adjacent to the stock section is configured with a tapering portion for receiving a pre-rolled magnetic strip.
4. The annular magnetic-sheet molding apparatus according to claim 1, wherein the annular magnetic-sheet molding apparatus includes a rotating device for coaxially extending into the stock section to curl a magnetic strip input into the stock section into a loop by a rotational movement.
5. The annular magnetic sheet molding apparatus as defined in claim 4, wherein the rotating means includes a core rod coaxially insertable into the stock section and a motor for driving the core rod to rotate, wherein a space between the core rod and the stock section in a radial direction of the cavity matches a dimension of the magnetic stripe in a radial direction of the cavity.
6. The annular magnetic sheet molding device according to claim 1, wherein the annular magnetic sheet molding device includes a feed passage leading to the stock section to feed a magnetic stripe to the stock section, the feed passage extending in a circumferential tangential direction of the stock section.
7. The annular magnetic sheet molding device according to claim 6, wherein the feed passage is provided in a side wall of the female mold block, or the feed passage is provided outside the female mold block.
8. The annular magnetic sheet molding apparatus according to claim 6, wherein the feed passage is configured to: the inclination angle of the circumferential surface of the cavity body towards the first direction and the second direction is not more than 15 degrees, wherein the first direction is the expanding direction of the conical inner cavity, and the second direction is the contracting direction of the conical inner cavity.
9. The annular magnetic sheet molding apparatus according to claim 8, wherein the feed passage is configured to: an inclination angle with respect to a circumferential surface of the cavity in the first direction is not more than 5 degrees, and an inclination angle in the second direction is not more than 10 degrees.
10. The annular magnetic sheet molding device of claim 6, wherein the magnetic sheet molding device includes a pusher for pushing the magnetic strip in a predetermined direction into the stock section within the feed channel.
11. The annular magnetic sheet molding device according to claim 1, wherein the feed portion and the annular portion are constructed as an integral structure, or the feed portion and the annular portion are constructed as a separate structure.
12. The apparatus for forming an annular magnetic sheet according to claim 1, wherein an inner diameter D of a position where the feed portion meets the annular portion 0 Is configured to: d+W>D 0 >D 1 Wherein D represents the outer diameter of the punch, W represents the width of the magnetic strip along the radial direction of the cavity, and D 1 Representing the inner diameter of the profiled section.
13. The apparatus for forming an annular magnetic sheet according to claim 12, wherein an inner diameter D of a portion where the feed portion meets the annular portion 0 Is configured to: d+W>D 0 >D 1 +W/2。
14. The annular magnetic sheet molding device of claim 1, wherein the stock section and the molding section are configured as a split structure, the magnetic sheet molding device comprising a feed sleeve for engaging the stock section and a feed ram for pushing a magnetic strip in the feed sleeve into the stock section.
15. A method of forming an annular magnetic sheet, characterized by being applied to the annular magnetic sheet forming apparatus according to any one of claims 1 to 14, the method comprising:
inputting a magnetic stripe of a preset length into the stock section and causing the magnetic stripe to be rolled Qu Chenghuan within the stock section;
moving at least one of the punch module and the die module such that the magnetic strip moves from the stock section to the forming section; and
the magnetic strip is extruded in the molding section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311432879.2A CN117140821B (en) | 2023-10-31 | 2023-10-31 | Annular magnetic sheet forming device and forming method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311432879.2A CN117140821B (en) | 2023-10-31 | 2023-10-31 | Annular magnetic sheet forming device and forming method |
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| CN117140821A CN117140821A (en) | 2023-12-01 |
| CN117140821B true CN117140821B (en) | 2024-02-23 |
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| US3109198A (en) * | 1959-01-27 | 1963-11-05 | Cie Financiere Pour Le Dev Ind | Method and apparatus for forming containers |
| JPH0546985A (en) * | 1991-08-16 | 1993-02-26 | Fuji Photo Film Co Ltd | Manufacture of recording disk |
| JP2000025059A (en) * | 1998-07-13 | 2000-01-25 | Fuji Kasei Kogyo Kk | Method and apparatus for producing panel by using magnetic tape piece shrunk into curled shape |
| JP2001138351A (en) * | 1999-11-15 | 2001-05-22 | Uchiyama Mfg Corp | Method of molding cylindrical magnet rubber |
| JP2008210860A (en) * | 2007-02-23 | 2008-09-11 | Yonezawa Densen Kk | Magnetic shield sheet and manufacturing method thereof, and coil having magnetic shield sheet |
| CN111390163A (en) * | 2020-04-26 | 2020-07-10 | 浙江凯文磁业有限公司 | Forming die and method for preparing high-performance radial neodymium ring magnet |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7325434B2 (en) * | 2004-09-01 | 2008-02-05 | Daido Tokushuko Kabushiki Kaisha | Method for manufacturing ring-shaped magnet material and manufacturing apparatus used therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3109198A (en) * | 1959-01-27 | 1963-11-05 | Cie Financiere Pour Le Dev Ind | Method and apparatus for forming containers |
| JPH0546985A (en) * | 1991-08-16 | 1993-02-26 | Fuji Photo Film Co Ltd | Manufacture of recording disk |
| JP2000025059A (en) * | 1998-07-13 | 2000-01-25 | Fuji Kasei Kogyo Kk | Method and apparatus for producing panel by using magnetic tape piece shrunk into curled shape |
| JP2001138351A (en) * | 1999-11-15 | 2001-05-22 | Uchiyama Mfg Corp | Method of molding cylindrical magnet rubber |
| JP2008210860A (en) * | 2007-02-23 | 2008-09-11 | Yonezawa Densen Kk | Magnetic shield sheet and manufacturing method thereof, and coil having magnetic shield sheet |
| CN111390163A (en) * | 2020-04-26 | 2020-07-10 | 浙江凯文磁业有限公司 | Forming die and method for preparing high-performance radial neodymium ring magnet |
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| CN117140821A (en) | 2023-12-01 |
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