CN110997271A - Insert molded article - Google Patents
Insert molded article Download PDFInfo
- Publication number
- CN110997271A CN110997271A CN201880053686.7A CN201880053686A CN110997271A CN 110997271 A CN110997271 A CN 110997271A CN 201880053686 A CN201880053686 A CN 201880053686A CN 110997271 A CN110997271 A CN 110997271A
- Authority
- CN
- China
- Prior art keywords
- nut
- bus bar
- fastening member
- molded article
- positioning pin
- 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.)
- Granted
Links
- 239000011347 resin Substances 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 3
- 230000002093 peripheral effect Effects 0.000 description 11
- 238000000465 moulding Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Images
Classifications
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/12—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels
-
- 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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting 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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/24—Feeding the material into the mould
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
An insert molded article (10) disclosed in the present specification is molded by a mold (50) provided with positioning pins (54) protruding from a lower mold (52) toward an upper mold (51), and the insert molded article (10) is provided with: a metal fastening member (a nut (30), a bus bar (20)) provided with a counter-boring section (a lower opening section (33), a through-hole section (23)) into which a positioning pin (54) is inserted, the counter-boring section opening downward; and a resin housing (40) integrally molded with the outer surface of the fastening member, wherein the fastening member includes a female screw portion (34) provided so as to be connected upward from the upper end of the spot-facing portion, and the positioning pin (54) has a vertical dimension equal to or smaller than the vertical dimension of the spot-facing portion.
Description
Technical Field
The technology disclosed by the present specification relates to an insert molded article.
Background
Conventionally, as a structure in which insert molding is performed in a state in which an insert nut is fitted to a positioning pin, a positioning structure described in japanese unexamined patent application publication No. 2-82506 (patent document 1 below) is known. Positioning pins are provided in the recesses engraved in the lower die, and insert nuts can be fitted to the positioning pins. A female thread is provided inside the insert nut.
Documents of the prior art
Patent document
Patent document 1: japanese Kokai publication Hei-2-82506
Disclosure of Invention
Problems to be solved by the invention
However, in the above-described structure, when the insert nut is fitted to the positioning pin, the female screw interferes with the positioning pin, and the female screw may be damaged.
Means for solving the problems
The insert molded article disclosed by the present specification is configured as follows: the insert molded article is formed by a mold provided with a positioning pin protruding from a lower mold toward an upper mold, and comprises: a metal fastening member provided with a spot facing portion into which the positioning pin is inserted so as to open downward; and a resin housing integrally molded with an outer surface of the fastening member, wherein the fastening member includes a female screw portion provided continuously upward from an upper end of the spot facing portion, and a vertical dimension of the dowel is set to be equal to or smaller than a vertical dimension of the spot facing portion.
According to this configuration, when the fastening member is assembled to the lower die, the positioning pin enters the spot-facing portion from below, but the positioning pin does not enter the female screw portion, so that interference between the inner peripheral wall constituting the female screw portion and the positioning pin can be avoided. Therefore, the positioning of the fastening member can be performed by the positioning pin, and the inner peripheral wall constituting the female screw portion can be prevented from being damaged by the positioning pin.
The insert molded article disclosed in the present specification may have the following configuration.
The fastening member may include a nut provided with the female screw portion and a bus bar on which a lower end portion of the nut is placed, and the counter-boring portion may include a lower opening portion of the nut and a through-hole portion provided to penetrate the bus bar in a vertical direction.
According to this configuration, since the counter-sunk portion is provided by the nut and the bus bar, the nut and the bus bar can be simultaneously positioned by the positioning pin.
The nut may be a pocket nut having a closed upper end portion on the opposite side to the bus bar, and an upper end portion of the nut may be exposed to the outside from the case.
According to this configuration, the bus bar and the nut are assembled to the lower die, and the upper die is brought into contact with the upper end portion of the nut from above, whereby the nut and the bus bar can be sandwiched between the upper die and the lower die. Therefore, the resin can be reliably prevented from entering between the lower end portion of the nut and the upper surface of the bus bar.
Effects of the invention
According to the insert molded article disclosed in the present specification, the fastening member can be positioned by the positioning pin, and the inner peripheral wall constituting the female screw portion can be prevented from being damaged by the positioning pin.
Drawings
Fig. 1 is a bottom view of the insert molded article.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a sectional view showing the lower die.
Fig. 4 is a sectional view showing a state where the bus bar is mounted to the lower mold.
Fig. 5 is a sectional view showing a state where the nut is assembled to the lower die.
Fig. 6 is a sectional view showing a state where a nut and a bus bar are sandwiched between an upper die and a lower die and then resin is injected into a molding cavity.
Detailed Description
< embodiment >
Embodiments are described with reference to the drawings of fig. 1 to 6. As shown in fig. 1, the insert molded article 10 of the present embodiment includes a plurality of bus bars 20 and a resin case 40 integrally molded with the bus bars 20. As shown in fig. 6, the insert molded article 10 is formed by insert molding using a mold 50. The mold 50 is composed of an upper mold 51 and a lower mold 52, and the housing 40 is formed by injecting molten resin into a molding cavity 53 formed between the upper mold 51 and the lower mold 52 in a clamped state. A positioning pin 54 is provided on the bottom surface of the lower die 52 so as to protrude upward toward the upper die 51. The positioning pin 54 has a cylindrical shape.
The bus bar 20 is formed of a conductive metal material, has a plate shape as a whole, and includes a horizontal portion 21 attached along a bottom surface of the lower mold 52. A through hole 23 is provided in a substantially central portion of the horizontal portion 21 so as to penetrate in the plate thickness direction (vertical direction), and a positioning pin 54 of the lower die 52 is inserted into the through hole 23 from below the through hole 23. The inner diameter of the through hole 23 is set to be substantially the same as or slightly larger than the diameter of the positioning pin 54. In addition, a positioning recess 55 recessed downward is provided on the bottom surface of the lower die 52 so as to match the outer shape of the horizontal portion 21 of the bus bar 20. The horizontal portion 21 of the bus bar 20 is positioned by inserting the positioning pin 54 through the through hole portion 23 and fitting into the positioning concave portion 55.
The nut 30 is formed of a conductive metal material, is bag-shaped as a whole, and includes: a cylindrical portion 31 having a cylindrical shape and opened downward; and an upper end portion 32 located on the opposite side of the lower opening portion 33 of the cylindrical portion 31, and closing the upper end opening portion of the cylindrical portion 31. A female screw portion 34 is formed in the inner space of the cylindrical portion 31 above the lower opening portion 33. The diameter of the lower opening 33 is set to be substantially the same as or slightly larger than the diameter of the positioning pin 54. The inner diameter of the female screw portion 34 is set to be slightly smaller than the diameter of the positioning pin 54.
The lower opening 33 and the female screw portion 34 are both circular hole-shaped spaces extending in the vertical direction, and the female screw portion 34 is provided so as to be connected to the upper side of the lower opening 33. The vertical dimension of the female screw portion 34 is set larger than the vertical dimension of the lower opening 33. The female screw portion 34 is disposed coaxially with the lower opening 33, and the inner diameter of the female screw portion 34 is set smaller than the inner diameter of the lower opening 33. A female screw is formed on the inner peripheral wall constituting the female screw portion 34, while no female screw is formed on the inner peripheral wall constituting the lower opening portion 33. The inner peripheral wall forming the lower opening 33 and the inner peripheral wall forming the female screw portion 34 are connected by a mortar-shaped tapered portion 35, and the upper end of the positioning pin 54 is positioned at the lower end of the tapered portion 35.
To assemble the bus bar 20 and the nut 30 to the lower mold 52, as shown in fig. 5, first, the bus bar 20 is placed on the bottom surface of the lower mold 52, and the horizontal portion 21 of the bus bar 20 is positioned at a predetermined position by the positioning pin 54 and the positioning recess 55. Specifically, the positioning pin 54 is fitted into the through hole 23, and the horizontal portion 21 is fitted into the positioning recess 55, thereby positioning the bus bar 20 in the horizontal direction. Next, the lower end portion of the nut 30 is placed on the upper surface of the bus bar 20. In this state, the positioning pin 54 is fitted into the lower opening 33, thereby positioning the nut 30 in the horizontal direction.
The positioning pin 54 is inserted through a counter-bored portion formed by the through-hole portion 23 of the bus bar 20 and the lower opening 33 of the nut 30, but is positioned below the female screw portion 34. That is, since the vertical dimension of the positioning pin 54 is equal to or less than the vertical dimension of the counter-boring portion (the space formed by the through-hole 23 and the lower opening 33), the thread of the female screw portion 34 is not damaged by the positioning pin 54. In this case, the through hole 23 and the lower opening 33 are coaxially arranged, and the inner peripheral wall constituting the through hole 23 and the inner peripheral wall constituting the lower opening 33 are arranged so as to be flush with each other and connected in the vertical direction.
Next, when the upper die 51 and the lower die 52 are closed, the top surface of the upper die 51 contacts the upper end portion 32 of the nut 30 from above, and the bus bar 20 and the nut 30 are sandwiched between the upper die 51 and the lower die 52 in the vertical direction. Thereby, a molding cavity 53 is formed between the top surface of the upper mold 51 and the bottom surface of the lower mold 52. Then, as shown in fig. 6, a molten resin is injected into the molding cavity 53, and the molten resin is cooled and solidified, thereby forming the case 40. Then, the upper mold 51 and the lower mold 52 are opened, and the insert molded article 10 is taken out.
However, the case 40 is integrally molded with the outer surfaces of the bus bar 20 and the nut 30, and is disposed so as to cover the boundary portion between the bus bar 20 and the nut 30. Therefore, there is a possibility that the molten resin enters from the boundary portion between the bus bar 20 and the nut 30 at the time of insert molding. However, since the upper surface of the bus bar 20 and the lower end portion of the nut 30 are firmly brought into contact with each other by the upper die 51 and the lower die 52, the molten resin does not enter the boundary portion between the bus bar 20 and the nut 30, and the snap-off can be reliably performed.
As described above, in the present embodiment, when the fastening member (the bus bar 20, the nut 30) is assembled to the lower die 52, the dowel pin 54 enters the counter-bored portion from below the counter-bored portion (the through-hole portion 23, the lower opening portion 33), but the dowel pin 54 does not enter the female screw portion 34, and therefore interference between the inner peripheral wall constituting the female screw portion 34 and the dowel pin 54 can be avoided. Therefore, the positioning pin 54 can be used to position the fastening member, and the inner peripheral wall constituting the female screw portion 34 can be prevented from being damaged by the positioning pin 54.
The following configuration may be adopted: the fastening member includes a nut 30 provided with a female screw portion 34, and a bus bar 20 placed on a lower end portion of the nut 30, and the spot-facing portion includes a lower opening 33 of the nut 30 and a through hole portion 23 provided to penetrate the bus bar 20 in the vertical direction.
According to this configuration, since the nut 30 and the bus bar 20 are provided with the spot facing portions, the nut 30 and the bus bar 20 can be simultaneously positioned by the positioning pins 54.
The following configuration may be adopted: the nut 30 is formed as a pocket nut in which an upper end portion 32 on the opposite side to the bus bar 20 is closed, and the upper end portion 32 of the nut 30 is exposed to the outside from the case 40.
According to such a configuration, by fitting the bus bar 20 and the nut 30 to the lower die 52, the upper die 51 is touched from above on the upper end portion 32 of the nut 30, and the nut 30 and the bus bar 20 can be sandwiched between the upper die 51 and the lower die 52. Therefore, the resin can be reliably prevented from entering between the lower end portion of the nut 30 and the upper surface of the bus bar 20.
< other embodiment >
The technology disclosed in the present specification is not limited to the embodiments described above and illustrated in the drawings, and includes, for example, the following various embodiments.
(1) In the above embodiment, the fastening member is constituted by the bus bar 20 and the nut 30, but may be a fastening member provided with only the nut 30. The nut 30 does not have to be a pocket nut, but may be a nut having a penetrating shape.
(2) In the above embodiment, the bus bar 20 is positioned by both the positioning pin 54 and the positioning recess 55, but the bus bar 20 may be positioned only by the positioning recess 55. In this case, the diameter of the through hole of the bus bar 20 may be set larger than the diameter of the lower opening 33 of the nut 30.
(3) In the above embodiment, the upper end portion 32 of the nut 30 is exposed to the outside from the case 40, but may be in a form in which the upper end portion of the nut is embedded in the case 40.
Description of the reference numerals
10: insert molded article
20: bus bar
23: through hole part
30: nut
33: lower side opening part
34: female screw part
40: shell body
50: die set
51: upper die
52: lower die
54: locating pin
Claims (3)
1. An insert molded article is molded by a mold in which a positioning pin is provided so as to protrude from a lower mold toward an upper mold, and the insert molded article includes:
a metal fastening member provided with a spot facing portion into which the positioning pin is inserted so as to open downward; and
a resin case integrally molded with an outer surface of the fastening member,
the fastening member includes a female screw portion provided continuously upward from an upper end of the countersink, and the vertical dimension of the dowel is equal to or smaller than the vertical dimension of the countersink.
2. The insert molded article according to claim 1,
the fastening member is configured to include a nut provided with the female screw portion and a bus bar on which a lower end portion of the nut is placed,
the spot facing portion includes a lower opening portion of the nut and a through hole portion provided in the bus bar so as to penetrate in the vertical direction.
3. The insert molded article according to claim 2,
the nut is a pocket nut having a closed upper end portion on a side opposite to the bus bar, and an upper end portion of the nut is exposed to the outside from the case.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-159126 | 2017-08-22 | ||
| JP2017159126 | 2017-08-22 | ||
| PCT/JP2018/030485 WO2019039395A1 (en) | 2017-08-22 | 2018-08-17 | Insert molded article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110997271A true CN110997271A (en) | 2020-04-10 |
| CN110997271B CN110997271B (en) | 2021-11-23 |
Family
ID=65438723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880053686.7A Active CN110997271B (en) | 2017-08-22 | 2018-08-17 | Insert molded article |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6819914B2 (en) |
| CN (1) | CN110997271B (en) |
| WO (1) | WO2019039395A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7532960B2 (en) | 2020-02-06 | 2024-08-14 | 東ソー株式会社 | Busbar parts |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04366089A (en) * | 1991-06-13 | 1992-12-17 | Kurimoto Ltd | Manufacture of union socket for plastic pipe |
| JPH05220780A (en) * | 1992-02-07 | 1993-08-31 | Sharp Corp | Mold |
| JPH11204955A (en) * | 1998-01-09 | 1999-07-30 | Yazaki Corp | Structure for fastening wire harness to electrical joint box |
| JP2000156922A (en) * | 1998-11-17 | 2000-06-06 | Yazaki Corp | Bus bar wiring structure in box |
| JP2005177898A (en) * | 2003-12-17 | 2005-07-07 | Ngk Spark Plug Co Ltd | Cutting tool body and cutting tool |
| CN1676300A (en) * | 2004-03-31 | 2005-10-05 | 住友电装株式会社 | Method for producing an insert-molded article and a mold assembly therefor |
| CN101112784A (en) * | 2007-07-12 | 2008-01-30 | 惠州市格林塑胶电子有限公司 | Plastic component having inside screw inserts |
| WO2008099614A1 (en) * | 2007-02-16 | 2008-08-21 | Panasonic Corporation | Capacitor unit and its manufacturing method |
| CN102015473A (en) * | 2008-02-27 | 2011-04-13 | Apc产品有限公司 | Closures for plastic containers adapted for automated insert molding |
| CN102756453A (en) * | 2011-04-28 | 2012-10-31 | 爱三工业株式会社 | Method for making built-in finished product, built-in nut, and built-in finished product |
| JP2013035208A (en) * | 2011-08-08 | 2013-02-21 | Yazaki Corp | Mold and insert resin molding method |
| JP5433366B2 (en) * | 2009-10-05 | 2014-03-05 | 三菱航空機株式会社 | Lightning-resistant fastener, aircraft assembly, and lightning-fastener fastening method |
| CN105143690A (en) * | 2012-10-10 | 2015-12-09 | 伯尔霍夫连接技术有限公司 | Component with sealing plug and method for the insert moulding of a component insert |
| CN205929245U (en) * | 2016-07-29 | 2017-02-08 | 维沃移动通信有限公司 | Inserts and injection mold mould plastics |
-
2018
- 2018-08-17 WO PCT/JP2018/030485 patent/WO2019039395A1/en active Application Filing
- 2018-08-17 JP JP2019537599A patent/JP6819914B2/en active Active
- 2018-08-17 CN CN201880053686.7A patent/CN110997271B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04366089A (en) * | 1991-06-13 | 1992-12-17 | Kurimoto Ltd | Manufacture of union socket for plastic pipe |
| JPH05220780A (en) * | 1992-02-07 | 1993-08-31 | Sharp Corp | Mold |
| JPH11204955A (en) * | 1998-01-09 | 1999-07-30 | Yazaki Corp | Structure for fastening wire harness to electrical joint box |
| JP2000156922A (en) * | 1998-11-17 | 2000-06-06 | Yazaki Corp | Bus bar wiring structure in box |
| JP2005177898A (en) * | 2003-12-17 | 2005-07-07 | Ngk Spark Plug Co Ltd | Cutting tool body and cutting tool |
| CN1676300A (en) * | 2004-03-31 | 2005-10-05 | 住友电装株式会社 | Method for producing an insert-molded article and a mold assembly therefor |
| WO2008099614A1 (en) * | 2007-02-16 | 2008-08-21 | Panasonic Corporation | Capacitor unit and its manufacturing method |
| CN101112784A (en) * | 2007-07-12 | 2008-01-30 | 惠州市格林塑胶电子有限公司 | Plastic component having inside screw inserts |
| CN102015473A (en) * | 2008-02-27 | 2011-04-13 | Apc产品有限公司 | Closures for plastic containers adapted for automated insert molding |
| JP5433366B2 (en) * | 2009-10-05 | 2014-03-05 | 三菱航空機株式会社 | Lightning-resistant fastener, aircraft assembly, and lightning-fastener fastening method |
| CN102756453A (en) * | 2011-04-28 | 2012-10-31 | 爱三工业株式会社 | Method for making built-in finished product, built-in nut, and built-in finished product |
| JP2012232430A (en) * | 2011-04-28 | 2012-11-29 | Aisan Industry Co Ltd | Method of producing insert molding, insert nut, and insert molding |
| JP2013035208A (en) * | 2011-08-08 | 2013-02-21 | Yazaki Corp | Mold and insert resin molding method |
| CN105143690A (en) * | 2012-10-10 | 2015-12-09 | 伯尔霍夫连接技术有限公司 | Component with sealing plug and method for the insert moulding of a component insert |
| CN205929245U (en) * | 2016-07-29 | 2017-02-08 | 维沃移动通信有限公司 | Inserts and injection mold mould plastics |
Non-Patent Citations (1)
| Title |
|---|
| 李耀辉；殷兵: "注塑模具嵌件成型技术研究与应用", 《制造技术与机床》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110997271B (en) | 2021-11-23 |
| JPWO2019039395A1 (en) | 2020-02-27 |
| JP6819914B2 (en) | 2021-01-27 |
| WO2019039395A1 (en) | 2019-02-28 |
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