CN107834785B - Method for improving injection molding shaping quality of miniature motor stator - Google Patents
Method for improving injection molding shaping quality of miniature motor stator Download PDFInfo
- Publication number
- CN107834785B CN107834785B CN201711113202.7A CN201711113202A CN107834785B CN 107834785 B CN107834785 B CN 107834785B CN 201711113202 A CN201711113202 A CN 201711113202A CN 107834785 B CN107834785 B CN 107834785B
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- China
- Prior art keywords
- stator
- mold
- die
- trough
- injection molding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000007493 shaping process Methods 0.000 title claims description 9
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 239000007769 metal material Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 238000002844 melting Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 3
- 238000001125 extrusion Methods 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
Abstract
The invention is composed of an upper die, a material injection port, a guide sleeve, a lower die, a die core, a guide post, a die cavity, a trough and a cross trough, which improves the feeding environment of a narrow gap in a central area on the basis of the traditional stator injection molding process, and besides feeding along the peripheral trough of a stator, the die core trough is specially added for feeding, so that the filling environment of the narrow gap in the center is close to or better than the peripheral filling environment. The method solves the technical defects that the prior art depends on improving the melting temperature of the filling material and additionally increasing the injection molding force, which is easy to cause extrusion deformation of the stator blank, damage of coil insulation and the like, and the injection molding quality of the stator is reduced.
Description
Technical Field
The invention relates to a method for improving injection molding shaping quality of a stator of a miniature motor.
Background
The injection molding shaping is a common process in the production of the stator of the miniature motor, and because the space of the central position of the stator is not large and the air gap between the stator and the rotor is small, the stator after injection molding requires the protection and the sealing of the coil to be good, the insulating layer of the coil is not damaged, short-circuited and deformed, which does have certain difficulty, especially the filling of narrow gaps in the central area. In the traditional process, in order to enhance the fluidity of the filling material in the casting process, the melting temperature of the filling material is often properly increased, and meanwhile, the injection pressure is properly increased according to the injection filling condition, so that the filling material can smoothly fill the whole die cavity. However, this method has a disadvantage in that the coil is subjected to an increased force and is easily deformed by extrusion, so that insulation of the coil is damaged, resulting in a decrease in the yield of the injection-molded stator.
Disclosure of Invention
The invention improves the feeding environment of the narrow gap in the central area on the basis of the traditional stator injection molding process, and besides the feeding of the peripheral trough of the stator, the feeding of the trough of the mold core is specially added, so that the filling environment of the narrow gap in the center is close to or better than the peripheral filling environment. Through the improved die, the melting temperature of the filling material is not required to be increased and the injection molding force is not required to be additionally increased during injection molding, namely, the hidden danger of quality degradation during stator injection molding is thoroughly eliminated.
The invention comprises an upper die, a material injection port, a guide sleeve, a lower die, a die core, a guide post, a die cavity, a material groove and a cross material groove, wherein the upper die is made of metal materials, the appearance is rectangular, the guide sleeve is arranged at four corners, the parting surface is provided with the die cavity which is consistent with the shape of the upper half part of a stator and is consistent with the lower die, the material groove which is consistent with the lower die and has a semicircular arc cross section is arranged, the top surface is provided with the material injection port which is communicated with the parting surface material groove, and the material filling area of the die cavity is communicated with the material groove arranged in the die core of the lower die. The lower die is made of metal materials, the appearance is rectangular, guide posts matched with the guide sleeve are arranged at four corners, the parting surface is provided with a lower die cavity part which is consistent with the shape of the lower half part of the stator and is consistent with the upper part of the die cavity, a die core for positioning and guiding the stator blank is arranged in the die cavity, and a trough which is consistent with the upper die and has a semicircular cross section is arranged in the die cavity. The mold core is cylindrical, is firmly connected with the lower mold, is radially provided with a cross trough, and the cross trough cavity is slowly narrowed at the cylindrical surface of the mold core so as to facilitate the removal of an inner stub bar in the mold core, the diameter of the mold core is in clearance fit with the central hole of the stator, and the clearance between the central hole wall of the stator and the rotor after injection molding shaping is required to be reasonably selected to be small on the premise of no contact. The mold cavity is required to meet the requirements of mold manufacturing specifications such as demolding inclination, surface roughness and the like. During operation, the die is arranged on the injection molding machine, and the parting surfaces of the upper die and the lower die can be separated or folded through the guide post and the guide sleeve. Opening the parting surface, putting a stator blank, closing the parting surface, locking the mold, injection molding, opening the mold, taking out the stator injection molding piece with the outer stub bars and the inner stub bars, and then removing the inner stub bars and the outer stub bars.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a top view of the present invention.
FIG. 3 is a cross-sectional view of the C-C of FIG. 2 in accordance with the present invention.
Fig. 4 is a D-D cross-sectional view of fig. 3 in accordance with the present invention.
In the figure 1, an upper die; 1-1, a material injection port; 2. guide sleeve; 3. a lower die; 4. a mold core; 5. a guide post; 1. a mold cavity; 02. a trough; 03. a filler; 04. an outer stub bar; 05. an inner stub bar; 06. a stator blank; 07. cross trough.
Detailed Description
The upper die (1) is made of metal materials, the appearance is rectangular, guide sleeves (2) are arranged at four corners, a die cavity (01) which is consistent with the shape of the upper half part of the stator and is matched with the lower die (3) is arranged on the parting surface, a trough (02) which is semicircular in cross section and matched with the lower die (3) is arranged on the parting surface, a material injection port (1-1) communicated with the parting surface trough (02) is arranged on the top surface, and a material filling (03) area of the die cavity (01) is communicated with the trough (02) arranged in the die core (4) of the lower die (3). The lower die (3) is made of metal materials, the appearance is rectangular, guide posts (5) matched with the guide sleeve (2) are arranged at four corners, the parting surface is provided with the lower part of the die cavity (01) which is consistent with the shape of the lower half part of the stator and is consistent with the upper part of the die cavity (01), the die core (4) for positioning and guiding a stator blank (06) is arranged in the die cavity (01), and a semicircular groove (02) which is consistent with the upper die (1) is arranged. The mold core (4) is cylindrical and is firmly connected with the lower mold (3), the cross trough (07) is radially arranged, and the cavity of the cross trough (07) is slowly narrowed at the cylindrical surface of the mold core (4) so as to facilitate the cutting of an inner stub bar (05) in the mold core (4), the diameter of the mold core (4) is in clearance fit with a central hole of a stator, and the clearance between the central hole wall of the stator and a rotor after injection molding shaping is reasonably selected to be small on the premise of no contact. The mold cavity (01) is required to meet the requirements of mold manufacturing specifications such as demolding inclination, surface roughness and the like. When in operation, the die is arranged on the injection molding machine, and the parting surfaces of the upper die (1) and the lower die (3) can be separated or closed through the guide post (5) and the guide sleeve (2). Opening the parting plane, putting the stator blank (06), closing the parting plane, locking the mold, injection molding, opening the mold, taking out the stator injection molding piece with the outer stub bar (04) and the inner stub bar (05), and then removing the inner stub bar and the outer stub bar.
Claims (2)
1. The method for improving the injection molding shaping quality of the miniature motor stator is characterized by additionally arranging a mold core trough for feeding, improving the filling environment of narrow gaps in the central area of the miniature motor stator injection molding shaping mold, wherein the shaping mold consists of an upper mold, a material injection port, a guide sleeve, a lower mold, a mold core, a guide post, a mold cavity, a trough and a cross trough; the lower die is rectangular in shape, guide posts matched with the guide sleeve are arranged at four corners of the lower die, the parting surface is provided with a lower part of the die cavity which is consistent with the shape of the lower half part of the stator and is consistent with the upper part of the die cavity, a die core for positioning and guiding a stator blank is arranged in the die cavity, and a trough which is consistent with the upper die and has a semicircular cross section is arranged in the die cavity; the mold core is cylindrical, is firmly connected with the lower mold, is radially provided with a cross trough, the cross trough cavity is gradually narrowed at the cylindrical surface of the mold core, and the diameter of the mold core is in clearance fit with the central hole of the stator.
2. The method for improving the injection molding quality of a stator of a miniature motor of claim 1, wherein the upper mold and the lower mold are made of metal materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711113202.7A CN107834785B (en) | 2017-11-02 | 2017-11-02 | Method for improving injection molding shaping quality of miniature motor stator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711113202.7A CN107834785B (en) | 2017-11-02 | 2017-11-02 | Method for improving injection molding shaping quality of miniature motor stator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107834785A CN107834785A (en) | 2018-03-23 |
| CN107834785B true CN107834785B (en) | 2024-03-15 |
Family
ID=61654153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711113202.7A Active CN107834785B (en) | 2017-11-02 | 2017-11-02 | Method for improving injection molding shaping quality of miniature motor stator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107834785B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111384796A (en) * | 2018-12-29 | 2020-07-07 | 上海微创心力医疗科技有限公司 | Motor stator, die and method for manufacturing motor stator, motor and catheter pump |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1340873A (en) * | 1962-08-24 | 1963-10-25 | Sev Marchal | Alternator stator isolation method |
| JPS60210142A (en) * | 1984-04-02 | 1985-10-22 | Matsushita Electric Ind Co Ltd | Stator of molded motor |
| JP2003324913A (en) * | 2002-05-08 | 2003-11-14 | Aisin Aw Co Ltd | Method of manufacturing core equipped with insulating material, and core manufactured thereby |
| JP2009137103A (en) * | 2007-12-05 | 2009-06-25 | Toyota Motor Corp | Mold forming method of stator and apparatus therefor |
| JP2015073406A (en) * | 2013-10-04 | 2015-04-16 | 日産自動車株式会社 | Mold forming method and mold forming device for stator |
| CN105082456A (en) * | 2015-09-14 | 2015-11-25 | 广东威灵电机制造有限公司 | Mold core for stator injection mold and stator injection mold with same |
| CN207388188U (en) * | 2017-11-02 | 2018-05-22 | 浙江恒森实业集团有限公司 | A kind of micromachine stator injection setting mould |
-
2017
- 2017-11-02 CN CN201711113202.7A patent/CN107834785B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1340873A (en) * | 1962-08-24 | 1963-10-25 | Sev Marchal | Alternator stator isolation method |
| JPS60210142A (en) * | 1984-04-02 | 1985-10-22 | Matsushita Electric Ind Co Ltd | Stator of molded motor |
| JP2003324913A (en) * | 2002-05-08 | 2003-11-14 | Aisin Aw Co Ltd | Method of manufacturing core equipped with insulating material, and core manufactured thereby |
| JP2009137103A (en) * | 2007-12-05 | 2009-06-25 | Toyota Motor Corp | Mold forming method of stator and apparatus therefor |
| JP2015073406A (en) * | 2013-10-04 | 2015-04-16 | 日産自動車株式会社 | Mold forming method and mold forming device for stator |
| CN105082456A (en) * | 2015-09-14 | 2015-11-25 | 广东威灵电机制造有限公司 | Mold core for stator injection mold and stator injection mold with same |
| CN207388188U (en) * | 2017-11-02 | 2018-05-22 | 浙江恒森实业集团有限公司 | A kind of micromachine stator injection setting mould |
Non-Patent Citations (1)
| Title |
|---|
| BMC 材料塑封电机模具的设计;区迎;电机电器技术;19971220(第04期) * |
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|---|---|
| CN107834785A (en) | 2018-03-23 |
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