CN110587915A - Magnetic steel insert injection molding device and injection molding method - Google Patents
Magnetic steel insert injection molding device and injection molding method Download PDFInfo
- Publication number
- CN110587915A CN110587915A CN201911016846.3A CN201911016846A CN110587915A CN 110587915 A CN110587915 A CN 110587915A CN 201911016846 A CN201911016846 A CN 201911016846A CN 110587915 A CN110587915 A CN 110587915A
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- Prior art keywords
- injection molding
- magnetic steel
- steel insert
- protection structure
- prefabricated protection
- Prior art date
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 149
- 239000010959 steel Substances 0.000 title claims abstract description 149
- 238000001746 injection moulding Methods 0.000 title claims abstract description 116
- 238000002347 injection Methods 0.000 claims abstract description 44
- 239000007924 injection Substances 0.000 claims abstract description 44
- 238000010030 laminating Methods 0.000 claims abstract description 7
- 238000000465 moulding Methods 0.000 claims abstract description 7
- 239000003292 glue Substances 0.000 claims description 24
- 239000003822 epoxy resin Substances 0.000 claims description 17
- 229920000647 polyepoxide Polymers 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 15
- 239000004519 grease Substances 0.000 claims description 7
- 239000002985 plastic film Substances 0.000 claims description 7
- 229920006255 plastic film Polymers 0.000 claims description 7
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 5
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 5
- 230000007547 defect Effects 0.000 abstract description 8
- 239000004033 plastic Substances 0.000 abstract description 5
- 229920003023 plastic Polymers 0.000 abstract description 5
- 238000001723 curing Methods 0.000 description 25
- 238000000034 method Methods 0.000 description 8
- 230000001681 protective effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000003848 UV Light-Curing Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C2045/1486—Details, accessories and auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of injection molding processes, and discloses an injection molding device and an injection molding method for a magnetic steel insert. The magnetic steel insert injection molding device comprises a first injection mold, a second injection mold and a prefabricated protection structure, wherein the second injection mold is buckled with the first injection mold to form an injection molding cavity, and parts to be subjected to integral injection molding and a magnetic steel insert are arranged in the injection molding cavity; prefabricated protection architecture sets up in the chamber of moulding plastics, and one side and the laminating of magnet steel inserts's surface of prefabricated protection architecture, the laminating of opposite side and first injection mold's inner wall. The magnetic steel insert injection molding method adopts the magnetic steel insert injection molding device for injection molding. According to the invention, the prefabricated protection structure is highly attached to the outer surface of the magnetic steel insert, external injection pressure can be applied to the prefabricated protection structure, the magnetic steel insert is not stressed, and the hidden crack defect caused by mismatching of the magnetic steel insert and a mold due to the outer diameter tolerance or the inner diameter tolerance of the magnetic steel insert is avoided.
Description
Technical Field
The invention relates to the technical field of injection molding processes, in particular to an injection molding device and an injection molding method for a magnetic steel insert.
Background
With the development of automobile technology, the demand for magnetic steel is more vigorous. The shape of the magnetic steel is not limited to some regular shapes, and more magnetic steels are required to be integrally molded as inserts of parts. Neodymium iron boron magnetic steel is a kind of magnetic steel commonly used in various industries, and is widely used due to its excellent magnetic properties.
However, the ndfeb magnet is a brittle material, and in the injection molding process, when the magnet is used as an insert for injection molding, the injection pressure is applied to the magnet insert, and the hidden crack defect is easily caused because the magnet insert is not matched with the injection mold due to the outer diameter tolerance of the magnet insert or the inner diameter tolerance of the injection mold. In the fields of automobile industry, aviation industry and the like with higher requirements on the strength of parts, the hidden crack defect of the magnetic steel insert can cause serious adverse effects.
Disclosure of Invention
Based on the problems, the invention aims to provide the magnetic steel insert injection molding device which is simple and convenient in injection molding process and can avoid the hidden crack defect of the magnetic steel insert.
The invention also aims to provide the magnetic steel insert injection molding method, the injection molding process is simple and convenient, and the hidden crack defect of the magnetic steel insert can be avoided.
In order to achieve the purpose, the invention adopts the following technical scheme:
a magnetic steel insert injection molding device, comprising:
a first injection mold;
the second injection mold is buckled with the first injection mold to form an injection molding cavity, and the parts to be integrally injected and the magnetic steel insert are arranged in the injection molding cavity;
and the prefabricated protection structure is arranged in the injection molding cavity, one side of the prefabricated protection structure is attached to the outer surface of the magnetic steel insert, and the other side of the prefabricated protection structure is attached to the inner wall of the first injection mold.
As the preferred scheme of the magnetic steel insert injection molding device, the prefabricated protection structure is formed by epoxy resin glue pouring, low-pressure injection molding or curing glue curing.
As a preferred scheme of the magnetic steel insert injection molding device, the prefabricated protection structure is made of a hard material.
As a preferable scheme of the magnetic steel insert injection molding device, the magnetic steel insert injection molding device further comprises a stripping layer, and the stripping layer is clamped between the prefabricated protection structure and the magnetic steel insert.
As the preferable scheme of the magnetic steel insert injection molding device, the stripping layer is a plastic film.
As a preferable scheme of the magnetic steel insert injection molding device, the stripping layer is prepared from grease.
As a preferred scheme of the magnetic steel insert injection molding device, an injection molding groove is formed in the first injection mold, and the prefabricated protection structure is attached to the inner wall of the injection molding groove.
As a preferred scheme of the magnetic steel insert injection molding device of the present invention, a faying surface of the prefabricated protection structure and the magnetic steel insert is an arc surface.
As the preferable scheme of the magnetic steel insert injection molding device, the magnetic steel insert is prepared from neodymium iron boron.
A magnetic steel insert injection molding method uses the magnetic steel insert injection molding device, and comprises the following steps:
s1, in the first injection mold, obtaining a prefabricated protection structure by epoxy resin glue pouring, low-pressure injection molding or curing glue curing, wherein the prefabricated protection structure is wrapped on the outer surface of the magnetic steel insert;
s2, integrally molding the magnetic steel insert and the parts;
and S3, stripping the prefabricated protection structure from the magnetic steel insert after injection molding.
The invention has the beneficial effects that:
in the magnetic steel insert injection molding device provided by the invention, the second injection mold is buckled with the first injection mold to form an injection molding cavity, parts to be integrally molded and the magnetic steel insert are arranged in the injection molding cavity, the prefabricated protection structure is arranged in the injection molding cavity, the shape of the prefabricated protection structure is matched with that of the magnetic steel insert, one side of the prefabricated protection structure is attached to the outer surface of the magnetic steel insert, the other side of the prefabricated protection structure is attached to the inner wall of the first injection mold, by the high fit of the prefabricated protection structure and the outer surface of the magnetic steel insert, the external injection pressure can be applied to the prefabricated protection structure which is made of hard material, therefore, the condition that the magnetic steel insert is stressed can not be caused, the bad condition that the magnetic steel insert is hidden and cracked after injection molding is guaranteed, and the hidden crack defect caused by mismatching of the magnetic steel insert and a mold due to the outer diameter tolerance or the inner diameter tolerance of the magnetic steel insert is avoided.
According to the magnetic steel insert injection molding method provided by the invention, in a first injection mold, an epoxy resin pouring, low-pressure injection molding or curing adhesive curing is adopted to obtain a prefabricated protection structure, the prefabricated protection structure is wrapped on the outer surface of the magnetic steel insert, the process modes of epoxy resin pouring, low-pressure injection molding or curing adhesive curing do not have external pressure and high temperature, the magnetic steel insert can be stored perfectly, and the outer surface of each magnetic steel insert with different shapes is ensured to be wrapped with a prefabricated protection structure which is completely matched with the shape of the magnetic steel insert, so that the influence of product tolerance is avoided; when the magnetic steel insert and the part are subjected to integral injection molding simultaneously, external injection molding pressure is applied to the prefabricated protection structure, and the prefabricated protection structure is made of a hard material, so that the magnetic steel insert cannot be stressed, and the magnetic steel insert cannot be subjected to hidden cracking after injection molding; in the process of obtaining the prefabricated protection structure by adopting epoxy resin glue pouring, low-pressure injection molding or curing glue curing, grease can be coated or a plastic film can be laid on the joint of the magnetic steel insert and the prefabricated protection structure, so that the magnetic steel insert is smoothly stripped from the prefabricated protection structure after the injection molding is finished.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a magnetic steel insert injection molding apparatus according to an embodiment of the present invention;
FIG. 2 is an isometric view of a magnetic steel insert and a preformed protective structure provided by an embodiment of the present invention;
FIG. 3 is a schematic structural view of a magnetic steel insert, a preformed protective structure and a release layer according to an embodiment of the present invention;
fig. 4 is a flowchart of a magnetic steel insert injection molding method according to an embodiment of the present invention.
In the figure:
1-a first injection mould; 2-a second injection mold; 3-magnetic steel insert; 4-prefabricating a protection structure; 5-a peeling layer; 6-parts.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to fig. 3, the present embodiment provides a magnetic steel insert injection molding device, which can be used in a process of integrally injecting magnetic steel as an insert of a component 6. The magnetic steel insert injection molding device comprises a first injection mold 1, a second injection mold 2 and a prefabricated protection structure 4. In this embodiment, the magnetic steel insert 3 is made of neodymium iron boron, which is exemplified by neodymium iron boron magnetic steel.
Specifically, the second injection mold 2 and the first injection mold 1 are buckled to form an injection molding cavity, and the part 6 to be integrally injection molded and the magnetic steel insert 3 are arranged in the injection molding cavity; prefabricated protection architecture 4 sets up in the chamber of moulding plastics, and prefabricated protection architecture 4's shape and magnet steel insert 3 looks adaptation, and one side of prefabricated protection architecture 4 and the laminating of the surface of magnet steel insert 3, the laminating of opposite side and first injection mold 1's inner wall. Through the high laminating of surface of prefabricated protection architecture 4 and magnet steel insert 3, outside injection pressure will be exerted in prefabricated protection architecture 4, because prefabricated protection architecture 4 is hard material, so can not lead to the condition that the atress appears in magnet steel insert 3 to guarantee that magnet steel insert 3 can not produce the latent bad condition of splitting after moulding plastics, avoided because magnet steel insert 3's the external diameter tolerance or the mould internal diameter tolerance of magnet steel insert 3 lead to the latent defect of splitting that magnet steel insert 3 and mould mismatch caused.
Optionally, the prefabricated protective structure 4 is formed by epoxy resin potting, low-pressure injection molding or curing glue. In this embodiment, in first injection mold 1, can adopt the epoxy resin encapsulating to obtain prefabricated protection architecture 4, prefabricated protection architecture 4 parcel is at magnet steel insert 3's surface, there is not outside pressure in the technological mode of epoxy resin encapsulating, does not have the condition of high temperature yet, can preserve magnet steel insert 3 intact to guarantee that the surface of the different magnet steel insert 3 of each shape all wraps up one and has prefabricated protection architecture 4 that the shape matches completely with it, do not receive the influence of product tolerance. Of course, in other embodiments, the prefabricated protection structure 4 may also be obtained by using low-pressure injection molding, UV curing glue or light curing, and the same function and effect can be achieved, which is not limited herein. It should be noted that the adopted curing glue can be various curing glues, and is not limited herein.
In order to ensure the quality of the subsequent process, the prefabricated protective structure 4 is optionally made of a hard material. The use of soft or elastic materials should be avoided for the prefabricated protective structure 4. When the magnetic steel insert 3 and the part 6 are subjected to integral injection molding simultaneously, the external injection molding pressure is applied to the prefabricated protection structure 4, and the prefabricated protection structure 4 is made of a hard material, so that the stress condition of the magnetic steel cannot be caused, and the poor condition that the magnetic steel insert 3 is hidden and cracked after injection molding is ensured.
In order to peel off the prefabricated protection structure 4 from the magnetic steel insert 3, optionally, the magnetic steel insert injection molding device further includes a peeling layer 5, and the peeling layer 5 is sandwiched between the prefabricated protection structure 4 and the magnetic steel insert 3. The stripping layer 5 can be made of any material which can be easily stripped from the magnetic steel insert 3 and the prefabricated protection structure 4. In order to reduce the injection molding cost, the peeling layer 5 is optionally a plastic film. To facilitate the peeling of the prefabricated protective structure 4 from the magnetic steel insert 3, the peel layer 5 is optionally made of grease. In the process of obtaining the prefabricated protection structure 4 by adopting epoxy resin glue filling, low-pressure injection molding or curing glue curing, grease can be coated or a plastic film can be laid at the joint of the magnetic steel insert 3 and the prefabricated protection structure 4, so that the magnetic steel insert 3 is smoothly stripped from the prefabricated protection structure 4 after the injection molding is finished. Of course, in other embodiments, a material with a weaker strength is used as the material of the preformed protective structure 4, which is bonded to the material of the magnetic steel insert 3, so that the preformed protective structure can be easily peeled off after injection molding.
For the convenience of injection molding, optionally, an injection molding groove is formed in the first injection mold 1, and the prefabricated protection structure 4 is attached to the inner wall of the injection molding groove. In order to improve the injection molding quality, optionally, the joint surface of the prefabricated protection structure 4 and the magnetic steel insert 3 is a circular arc surface.
In the magnetic steel insert injection molding device provided by the embodiment, the second injection mold 2 is buckled with the first injection mold 1 to form an injection molding cavity, the part 6 to be integrally injected and the magnetic steel insert 3 are arranged in the injection molding cavity, the prefabricated protection structure 4 is arranged in the injection molding cavity, the shape of the prefabricated protection structure 4 is matched with that of the magnetic steel insert 3, one side of the prefabricated protection structure 4 is jointed with the outer surface of the magnetic steel insert 3, the other side is jointed with the inner wall of the first injection mold 1, by means of the high fit between the prefabricated protection structure 4 and the outer surface of the magnetic steel insert 3, the external injection pressure will be applied to the prefabricated protection structure 4, and since the prefabricated protection structure 4 is made of hard material, therefore, the condition that the magnetic steel is stressed can not be caused, the bad condition that the magnetic steel insert 3 is hidden and cracked after injection molding is ensured, and the hidden crack defect caused by mismatching of the magnetic steel insert 3 and a mold due to the outer diameter tolerance or the inner diameter tolerance of the magnetic steel insert 3 is avoided.
The embodiment provides a magnetic steel insert injection molding method, as shown in fig. 4, the magnetic steel insert injection molding method using the magnetic steel insert injection molding device includes the following steps:
s1, in the first injection mold 1, obtaining a prefabricated protection structure 4 by epoxy resin glue pouring, low-pressure injection molding or curing glue curing, wherein the prefabricated protection structure 4 is wrapped on the outer surface of the magnetic steel insert 3.
Specifically, in first injection mold 1, can adopt the epoxy resin encapsulating to obtain prefabricated protection architecture 4, prefabricated protection architecture 4 wraps up at magnet steel insert 3's surface, and there is not outside pressure in the technological mode of epoxy resin encapsulating, does not have the condition of high temperature yet, can preserve magnet steel insert 3 intact to guarantee that the surface of the different magnet steel inserts 3 of each shape all wraps up one and has prefabricated protection architecture 4 that the shape matches completely with it, do not receive the influence of product tolerance. Of course, in other embodiments, the prefabricated protection structure 4 may also be obtained by using low-pressure injection molding, UV curing glue or light curing, and the same function and effect can be achieved, which is not limited herein.
S2, carrying out integral injection molding on the magnetic steel insert 3 and the part 6 to obtain the magnetic steel insert 3.
Specifically, when magnet steel insert 3 and spare part 6 were moulded plastics integratively simultaneously, outside pressure of moulding plastics will be exerted in prefabricated protection architecture 4, because prefabricated protection architecture 4 is hard material, so can not lead to the condition that the atress appears in magnet steel insert 3 to guarantee that magnet steel insert 3 can not produce the hidden bad condition of splitting after moulding plastics.
And S3, peeling the prefabricated protection structure 4 from the magnetic steel insert 3 after injection molding.
Specifically, in the process of obtaining the prefabricated protection structure 4 by epoxy resin pouring, low-pressure injection molding or curing glue curing, grease can be applied or a plastic film can be laid at the joint of the magnetic steel insert 3 and the prefabricated protection structure 4, so that the magnetic steel insert 3 is smoothly peeled from the prefabricated protection structure 4 after the injection molding is completed.
According to the magnetic steel insert injection molding method provided by the embodiment, the prefabricated protection structure 4 is wrapped on the outer surface of the magnetic steel insert 3, external pressure and high temperature do not exist in the process modes of epoxy resin glue pouring, low-pressure injection molding or curing glue curing, the magnetic steel insert 3 can be stored perfectly, and the outer surface of each magnetic steel insert 3 with different shapes is wrapped with the prefabricated protection structure 4 which is completely matched with the outer surface of the magnetic steel insert 3 in shape and is not influenced by product tolerance; when the magnetic steel insert 3 and the part 6 are subjected to integral injection molding simultaneously, external injection molding pressure is applied to the prefabricated protection structure 4, and the prefabricated protection structure 4 is made of a hard material, so that the magnetic steel insert 3 cannot be stressed, and the magnetic steel insert 3 cannot be subjected to hidden cracking after injection molding; in the process of obtaining the prefabricated protection structure 4 by adopting epoxy resin glue filling, low-pressure injection molding or curing glue curing, grease can be coated or a plastic film can be laid at the joint of the magnetic steel insert 3 and the prefabricated protection structure 4, so that the magnetic steel insert 3 is smoothly stripped from the prefabricated protection structure 4 after the injection molding is finished.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The utility model provides a magnet steel insert injection molding device which characterized in that includes:
a first injection mold (1);
the second injection mold (2) is buckled with the first injection mold (1) to form an injection molding cavity, and a part (6) to be integrally injected and the magnetic steel insert (3) are arranged in the injection molding cavity;
prefabricated protection architecture (4), set up in the injection molding cavity, one side of prefabricated protection architecture (4) with the surface laminating of magnet steel inserts (3), the opposite side with the inner wall laminating of first injection mold (1).
2. A magnetic steel insert injection molding device according to claim 1, wherein the prefabricated protection structure (4) is formed by epoxy resin glue filling, low pressure injection molding or curing glue curing.
3. A magnetic steel insert injection molding device according to claim 1, characterized in that the preformed protection structure (4) is made of a hard material.
4. A magnetic steel insert injection molding device according to claim 1, further comprising a peeling layer (5), wherein the peeling layer (5) is sandwiched between the prefabricated protection structure (4) and the magnetic steel insert (3).
5. A magnetic steel insert injection molding device according to claim 4, characterized in that the peeling layer (5) is a plastic film.
6. A magnetic steel insert injection molding device according to claim 4, characterized in that the peeling layer (5) is made of grease.
7. A magnetic steel insert injection molding device according to claim 1, wherein an injection molding groove is provided on the first injection mold (1), and the prefabricated protection structure (4) is attached to an inner wall of the injection molding groove.
8. A magnetic steel insert injection molding device according to claim 1, wherein the joint surface of the prefabricated protection structure (4) and the magnetic steel insert (3) is a circular arc surface.
9. A magnetic steel insert injection molding device according to claim 1, characterized in that the magnetic steel insert (3) is made of neodymium iron boron.
10. A magnetic steel insert injection molding method, characterized in that the magnetic steel insert injection molding device according to any one of claims 1 to 9 is used, and comprises the following steps:
s1, in the first injection mold (1), obtaining a prefabricated protection structure (4) by epoxy resin glue pouring, low-pressure injection molding or curing glue curing, wherein the prefabricated protection structure (4) is wrapped on the outer surface of the magnetic steel insert (3);
s2, integrally molding the magnetic steel insert (3) and the part (6) by injection;
s3, peeling the prefabricated protection structure (4) from the magnetic steel insert (3) after injection molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911016846.3A CN110587915A (en) | 2019-10-24 | 2019-10-24 | Magnetic steel insert injection molding device and injection molding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911016846.3A CN110587915A (en) | 2019-10-24 | 2019-10-24 | Magnetic steel insert injection molding device and injection molding method |
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| CN110587915A true CN110587915A (en) | 2019-12-20 |
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| CN201911016846.3A Pending CN110587915A (en) | 2019-10-24 | 2019-10-24 | Magnetic steel insert injection molding device and injection molding method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111844609A (en) * | 2020-06-28 | 2020-10-30 | 歌尔光学科技有限公司 | Injection molding method |
| CN112787471A (en) * | 2021-01-05 | 2021-05-11 | 常州机电职业技术学院 | Automatic magnetic steel sheet pasting device for permanent magnet synchronous motor |
| CN113942172A (en) * | 2021-09-30 | 2022-01-18 | 歌尔股份有限公司 | Injection molding method of composite material |
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