CN102001158B - Plastic injection manufacture mold for ignition coil housing and ignition coil housing - Google Patents
Plastic injection manufacture mold for ignition coil housing and ignition coil housing Download PDFInfo
- Publication number
- CN102001158B CN102001158B CN201010531728.9A CN201010531728A CN102001158B CN 102001158 B CN102001158 B CN 102001158B CN 201010531728 A CN201010531728 A CN 201010531728A CN 102001158 B CN102001158 B CN 102001158B
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- Prior art keywords
- ignition coil
- mold
- coil shell
- injection molding
- inner mold
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000002347 injection Methods 0.000 title abstract description 13
- 239000007924 injection Substances 0.000 title abstract description 13
- 229920003023 plastic Polymers 0.000 title abstract description 12
- 239000004033 plastic Substances 0.000 title abstract description 12
- 238000001746 injection moulding Methods 0.000 claims description 38
- 238000010112 shell-mould casting Methods 0.000 description 9
- 238000007493 shaping process Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
The invention discloses a plastic injection manufacture mold for an ignition coil housing, which comprises an internal mold and an external mold, wherein the internal mold comprises an internal-mold bottom and an internal-mold wall, and the external mold comprises an external-mold bottom and an external-mold wall; and the internal-mold bottom or the external-mold bottom is provided with an injection hole, and the bottom surface of the internal-mold bottom of the internal mold is provided with a guide groove. The invention also discloses the ignition coil housing, which comprises a bottom and a side wall, wherein the bottom comprises a high pressure tower, and the surface of an internal cavity at the bottom of the ignition coil housing is provided with a raised guide rib. The high pressure tower at the bottom of the ignition coil housing produced by using the plastic injection manufacture mold of the invention is not easy to have shrinkage cavities and air bubbles.
Description
Technical Field
The invention relates to the automobile electronic technology, in particular to an injection molding manufacturing mold of an ignition coil shell and the ignition coil shell.
Background
When the automobile engine works, the high voltage required by igniting the mixed gas is output from a high-voltage tower at the bottom of the ignition coil shell, and the high-voltage tower bears the high voltage of 15 KV-30 KV.
The ignition coil shell is generally manufactured by injection molding in a mold, and the injection molding manufacturing mold for the ignition coil shell comprises an inner mold and an outer mold, wherein the inner mold comprises an inner mold bottom and an inner mold wall, the outer mold comprises an outer mold bottom and an outer mold wall, and an injection molding hole is formed in the inner mold bottom or the outer mold bottom. When producing ignition coil casing, the centre form is arranged in at the bottom of the outer mould and the cavity that the outer mould wall formed, forms ignition coil casing shaping district between centre form and the external mould, then passes through the hole of moulding plastics pours into the melting plastic into with certain injection pressure to ignition coil casing shaping district, then obtains ignition coil casing through condensation, drawing of patterns, and ignition coil casing shaping district between the bottom surface at the bottom of the centre form and the top surface at the bottom of the external mould is used for the shaping bottom including the ignition coil casing of high-voltage tower, and the ignition coil casing shaping district between the inner mould wall and the external mould wall is used for the lateral wall of shaping ignition coil.
As shown in figure 1, the ignition coil shell comprises a bottom and a side wall, the bottom comprises a high-voltage tower 11, the wall thickness of the high-voltage tower 11 at the bottom of the ignition coil shell is uneven, and a high-voltage connecting pin is fixed in the high-voltage tower 11 in an injection molding mode and used for leading out high voltage generated by a secondary winding of the ignition coil arranged in the shell. As shown in fig. 2 and 3, the wall thickness of a high-voltage tower 11 located at the bottom of an ignition coil shell is not uniform, a high-voltage connecting pin 15 is fixed in the high-voltage tower 11 by injection molding, and an inner cavity surface 12 at the bottom of the ignition coil shell is a flat surface, that is, the bottom surface of an inner mold bottom of an inner mold of an injection molding manufacturing mold for producing the ignition coil shell is a flat surface.
In the injection molding process, molten plastic flows from an injection molding hole to an ignition coil shell molding area between an inner mold bottom and an outer mold bottom and an ignition coil shell molding area between an inner mold wall and an outer mold wall in sequence under certain injection pressure, because the bottom surface of the inner mold bottom of an inner mold of an injection molding manufacturing mold for producing the ignition coil shell is a flat surface, the injection flow passage area is not large enough, the injection speed of the molten plastic is not high under the same injection pressure, so that the plastic material cannot well fill the ignition coil shell molding area between the inner mold bottom and the outer mold bottom to form a high-pressure tower at the bottom of the ignition coil shell with uneven wall thickness, the high-pressure tower can generate shrinkage holes and bubbles to reduce the insulation performance, the leakage after the ignition high-pressure tower is punctured can cause unstable ignition or incapable ignition of mixed gas, and the engine shakes, fires and, Accelerating weakness and the like.
Disclosure of Invention
The technical problem to be solved by the invention is that a high-voltage tower at the bottom of an ignition coil shell is not easy to have shrinkage cavities and bubbles.
In order to solve the technical problem, the invention provides an injection molding manufacturing mold for an ignition coil shell, which comprises an inner mold and an outer mold, wherein the inner mold comprises an inner mold bottom and an inner mold wall, the outer mold comprises an outer mold bottom and an outer mold wall, an injection molding hole is formed in the inner mold bottom or the outer mold bottom, and a flow guide groove is formed in the bottom surface of the inner mold bottom of the inner mold of the injection molding manufacturing mold for the ignition coil shell.
The edge of the bottom surface of the inner mould bottom can be provided with an injection molding hole communicated with the flow guide groove.
The flow guide groove may be straight.
One end of the straight diversion groove is close to the high-pressure tower forming area, and the other end of the straight diversion groove is positioned at the edge of the bottom surface of the inner mold bottom.
The diversion groove can be annular and surrounds the high-pressure tower forming area.
The inner edge of the annular diversion groove is communicated with a plurality of grooves leading to the high-pressure tower forming area in a tooth shape.
In order to solve the technical problem, the invention also provides an ignition coil shell which comprises a bottom and a side wall, wherein the bottom comprises a high-voltage tower, and the inner cavity surface of the bottom of the ignition coil shell is provided with a raised flow guide rib.
The water conservancy diversion muscle can be straight shape, and straight shape water conservancy diversion muscle one end is close to the high-voltage tower of ignition coil casing bottom, and the other end is close to ignition coil casing bottom edge.
The diversion rib can be annular, and annular diversion rib encircles in the high-pressure column.
The inner edge of the annular flow guide rib is connected with a plurality of convex ribs leading to the high-pressure tower in a tooth shape.
When the ignition coil shell injection molding manufacturing mold is adopted to produce the ignition coil shell, in the injection molding process, molten plastic flows to an ignition coil shell molding area between an inner mold bottom and an outer mold bottom and an ignition coil shell molding area between the inner mold wall and the outer mold wall from an injection molding hole in sequence under certain injection pressure, as the bottom surface of the inner mold bottom of the inner mold of the ignition coil shell injection molding manufacturing mold is provided with the flow guide groove, the injection molding hole is communicated with the flow guide groove, the area of a flow passage is increased, the molten plastic can be better filled into the ignition coil shell molding area between the inner mold bottom and the outer mold bottom under the condition of keeping certain injection pressure, so as to form a high-pressure tower with uneven wall thickness at the bottom of the ignition coil shell, the defects of shrinkage holes, bubbles and the like in the high-pressure tower of the produced ignition coil shell can be ensured, and the high-pressure tower, the ignition high pressure is ensured not to leak from the high pressure tower, so that the ignition of the mixed gas is more stable and reliable, and the engine always works in the best state.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a perspective view of an ignition coil casing;
FIG. 2 is a longitudinal cross-sectional view of a typical ignition coil casing;
FIG. 3 is a top view of a common ignition coil casing;
FIG. 4 is a top plan view of a first embodiment of the ignition coil housing of the present invention;
FIG. 5 is a longitudinal cross-sectional view of a first embodiment of the ignition coil housing of the present invention;
fig. 6 is a top view of a second embodiment of the ignition coil casing of the present invention.
Detailed Description
The injection molding manufacturing mold for the ignition coil shell comprises an inner mold and an outer mold, wherein the inner mold comprises an inner mold bottom and an inner mold wall, the outer mold comprises an outer mold bottom and an outer mold wall, an injection molding hole is formed in the inner mold bottom or the outer mold bottom, a flow guide groove is formed in the bottom surface of the inner mold bottom of the inner mold of the injection molding manufacturing mold for the ignition coil shell, and the shape and the size of the flow guide groove can be designed adaptively according to structures of different ignition coil shells. When the ignition coil shell is produced, the inner mold is arranged in a cavity formed by the outer mold bottom and the outer mold wall, an ignition coil shell forming area is formed between the inner mold and the outer mold, the ignition coil shell forming area between the inner mold bottom and the outer mold bottom is used for forming the bottom of a high-voltage tower with uneven wall thickness of the ignition coil shell, and the ignition coil shell forming area between the inner mold wall and the outer mold wall is used for forming the side wall of the ignition coil shell.
In a first preferred embodiment, the diversion groove is straight, one end of the straight diversion groove is close to the high-pressure tower forming area, the other end of the straight diversion groove is located at the edge of the bottom surface of the inner mold bottom, and the edge of the bottom surface of the inner mold bottom is provided with an injection molding hole communicated with the straight diversion groove.
In a second preferred embodiment, the diversion groove is annular, the annular diversion groove surrounds the high-pressure tower forming area, the inner edge of the annular diversion groove is communicated with a plurality of grooves leading to the high-pressure tower forming area in a tooth shape, and the edge of the bottom surface of the inner mold bottom is provided with an injection molding hole communicated with the annular diversion groove.
When the ignition coil shell injection molding manufacturing mold of the embodiment is adopted to produce the ignition coil shell, in the injection molding process, molten plastic flows from an injection molding hole to an ignition coil shell molding area between an inner mold bottom and an outer mold bottom and an ignition coil shell molding area between the inner mold wall and the outer mold wall in sequence under certain injection pressure, as the bottom surface of the inner mold bottom of the inner mold of the ignition coil shell injection molding manufacturing mold is provided with the flow guide groove, the injection molding hole is communicated with the flow guide groove, the area of a flow passage is increased, the molten plastic can be better filled into the ignition coil shell molding area between the inner mold bottom and the outer mold bottom under the condition of keeping certain injection pressure, so as to form a high-pressure tower with uneven wall thickness at the bottom of the ignition coil shell, the defects of shrinkage holes, bubbles and the like in the high-pressure tower of the produced ignition coil shell can be ensured, and, the ignition high pressure is ensured not to leak from the high pressure tower, so that the ignition of the mixed gas is more stable and reliable, and the engine always works in the best state.
The ignition coil shell produced by the injection molding manufacturing mold for the ignition coil shell of the first embodiment is characterized in that a top view is shown in fig. 4, a longitudinal section view is shown in fig. 5, the ignition coil shell comprises a bottom, a side wall and a high-voltage connecting pin 15, the bottom comprises a high-voltage tower 11, the high-voltage connecting pin 15 is fixed in the high-voltage tower 11 in an injection molding mode, a raised straight diversion rib 13 is arranged on an inner cavity surface 12 at the bottom of the ignition coil shell, one end of the straight diversion rib 13 is close to the high-voltage tower 11 at the bottom of the ignition coil shell, and.
The ignition coil shell produced by the injection molding manufacturing mold for the ignition coil shell according to the second embodiment is characterized in that a top view is shown in fig. 6, the ignition coil shell comprises a bottom, a side wall and a high-voltage connecting pin 15, the bottom comprises a high-voltage tower 11, the high-voltage connecting pin 15 is fixed in the high-voltage tower 11 in an injection molding mode, a raised annular flow guiding rib 13 is arranged on an inner cavity surface 12 at the bottom of the ignition coil shell, the annular flow guiding rib 13 surrounds the high-voltage tower 11 at the bottom of the ignition coil shell, the inner edge of the annular flow guiding rib 13 is connected with a plurality of raised ribs leading to the high-voltage tower 11 at the bottom of the ignition coil.
Claims (3)
1. An ignition coil shell injection molding manufacturing mold comprises an inner mold and an outer mold, wherein the inner mold comprises an inner mold bottom and an inner mold wall, the outer mold comprises an outer mold bottom and an outer mold wall, and an injection molding hole is formed in the inner mold bottom or the outer mold bottom;
the flow guide groove is straight, one end of the straight flow guide groove is close to the high-pressure tower forming area, and the other end of the straight flow guide groove is positioned at the edge of the bottom surface of the inner mold bottom; or,
the flow guide groove is annular, the annular flow guide groove surrounds the high-pressure tower forming area, and the inner edge of the annular flow guide groove is communicated with a plurality of grooves leading to the high-pressure tower forming area in a tooth shape.
2. The injection molding mold for the ignition coil casing according to claim 1, wherein the bottom surface edge of the inner mold bottom is provided with an injection molding hole communicating with the flow guiding groove.
3. An ignition coil shell comprises a bottom and a side wall, wherein the bottom comprises a high-voltage tower, and is characterized in that a raised flow guide rib is arranged on the inner cavity surface of the bottom of the ignition coil shell;
the flow guiding ribs are straight, one end of each straight flow guiding rib is close to a high-voltage tower at the bottom of the ignition coil shell, and the other end of each straight flow guiding rib is close to the edge of the bottom of the ignition coil shell; or,
the annular diversion rib surrounds the high-pressure tower, and the inner edge of the annular diversion rib is connected with a plurality of raised ribs leading to the high-pressure tower in a toothed shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010531728.9A CN102001158B (en) | 2010-11-04 | 2010-11-04 | Plastic injection manufacture mold for ignition coil housing and ignition coil housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010531728.9A CN102001158B (en) | 2010-11-04 | 2010-11-04 | Plastic injection manufacture mold for ignition coil housing and ignition coil housing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102001158A CN102001158A (en) | 2011-04-06 |
| CN102001158B true CN102001158B (en) | 2014-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010531728.9A Active CN102001158B (en) | 2010-11-04 | 2010-11-04 | Plastic injection manufacture mold for ignition coil housing and ignition coil housing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102001158B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2347246Y (en) * | 1996-06-25 | 1999-11-03 | 罗伯特-博希股份公司 | Ignition coil group |
| CN2704910Y (en) * | 2004-06-08 | 2005-06-15 | 哈尔滨志阳汽车电气股份有限公司 | Igniting coil with controllable module |
| CN201092925Y (en) * | 2007-08-17 | 2008-07-30 | 联合汽车电子有限公司 | Ignition coil |
| CN201872300U (en) * | 2010-11-04 | 2011-06-22 | 联合汽车电子有限公司 | Ignition coil housing and injection molding mould therefor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3640992A1 (en) * | 1986-06-19 | 1987-12-23 | Bosch Gmbh Robert | IGNITION COIL FOR IGNITION SYSTEMS FOR INTERNAL COMBUSTION ENGINES |
-
2010
- 2010-11-04 CN CN201010531728.9A patent/CN102001158B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2347246Y (en) * | 1996-06-25 | 1999-11-03 | 罗伯特-博希股份公司 | Ignition coil group |
| CN2704910Y (en) * | 2004-06-08 | 2005-06-15 | 哈尔滨志阳汽车电气股份有限公司 | Igniting coil with controllable module |
| CN201092925Y (en) * | 2007-08-17 | 2008-07-30 | 联合汽车电子有限公司 | Ignition coil |
| CN201872300U (en) * | 2010-11-04 | 2011-06-22 | 联合汽车电子有限公司 | Ignition coil housing and injection molding mould therefor |
Non-Patent Citations (1)
| Title |
|---|
| JP昭63-503582A 1988.12.22 |
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| Publication number | Publication date |
|---|---|
| CN102001158A (en) | 2011-04-06 |
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