CN203739128U - Pressure-prevention positioning mold core seat for planar carbon commutator injection molding - Google Patents
Pressure-prevention positioning mold core seat for planar carbon commutator injection molding Download PDFInfo
- Publication number
- CN203739128U CN203739128U CN201420060032.6U CN201420060032U CN203739128U CN 203739128 U CN203739128 U CN 203739128U CN 201420060032 U CN201420060032 U CN 201420060032U CN 203739128 U CN203739128 U CN 203739128U
- Authority
- CN
- China
- Prior art keywords
- hole
- commutator
- pressure
- injection molding
- mold core
- 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.)
- Expired - Lifetime
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 30
- 238000001746 injection moulding Methods 0.000 title claims abstract description 27
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 10
- 238000005336 cracking Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Motor Or Generator Current Collectors (AREA)
Abstract
The utility model discloses a pressure-prevention positioning mold core seat for planar carbon commutator injection molding. The pressure-prevention positioning mold core seat for planar carbon commutator injection molding comprises a seat body, a central hole and a sunken part, wherein the central hole is used for holding a mandrel; the sunken part is used for holding a commutator, and is positioned at one end of the seat body; the central hole is positioned at the center of the sunken part and runs through the whole seat body; the central hole comprises an upper half hole and a lower half hole which are connected in a through mode; and the diameter of the upper half hole is greater than that of the lower half hole. The pressure-prevention positioning mold core seat for planar carbon commutator injection molding, which is provided by the utility model, solves the problem of carbon plate cracking and falling of the carbon commutator in injection molding, reduces the production cost, and eradicates the quality hazard and product potential risk.
Description
Technical field
The utility model relates to a kind of injection moulding core rod seat, is specifically related to positioning module core print seat against pressure for a kind of flat carbon commutator injection moulding.
Background technology
Existing electric-spraying fuel pump will seal injection moulding and protect armature after armature winding welding hook.Along with improving constantly of automobile fuel pump life requirements, copper commutator originally is progressively replaced by carbon commutator.But the intensity restriction due to material with carbon element itself, in original sealing injection moulding process, there is the contingencies that carbon plate cracking comes off after carbon commutator injection moulding, occurrence probability is in 1% left and right, especially after carbon plate pressure break, but not yet come off, this situation is difficult to be detected, and this has not only increased production cost but also has had serious hidden danger of quality and potential risk.
Core rod seat axle in existing electric-spraying fuel pump flat carbon commutator armature injection mold adopts through hole to fix, and injection pressure is acted directly on carbon commutator surface, and commutator has been subject to axial pressure.Simultaneously, on existing core rod, carbon commutator adopts straight hole location, when injection moulding, owing to there is the situation of injection moulding initial stage discharging opening pressure imbalance, makes the possibility of commutator run-off the straight, the sidewall of commutator and surface are pushed with core rod seat, and commutator is subject to radial and axial pressure.After above reason all easily causes carbon commutator injection moulding, carbon plate cracking comes off.
Utility model content
Goal of the invention: for the deficiencies in the prior art, the purpose of this utility model is to provide positioning module core print seat against pressure for a kind of flat carbon commutator injection moulding, has solved carbon plate cracking that carbon commutator occurs when the injection moulding problem that comes off.
Technical scheme: in order to realize foregoing invention object, the technical solution adopted in the utility model is as follows:
Positioning module core print seat against pressure for a kind of flat carbon commutator injection moulding, comprise pedestal, for placing the centre bore of mandrel and for placing the depression of commutator, depression is positioned at pedestal one end, centre bore is positioned at Depression Centers and runs through whole pedestal, described centre bore comprises first hole and second hole that connects connection, and the diameter in first described hole is greater than second hole.
First described hole and second junction, hole are provided with chamfering, allow commutator face and core rod seat keep 0.2-0.3mm gap, and injection pressure is acted in axle, have eliminated the axial pressure that commutator may be subject to.
On the inwall of described depression, establishing angle and be outer the moving back of 1 ~ 10 ° pulls out, even if there is the situation of injection moulding initial stage discharging opening pressure imbalance when injection moulding, after commutator run-off the straight, the sidewall of commutator and surface yet can not collided and push with core rod seat, have eliminated the radial and axial pressure that commutator may be subject to.
Beneficial effect: compared with prior art, advantage of the present utility model comprises: the centre bore of this core rod seat adopts stepped hole design, and injection pressure is acted on mandrel, has eliminated the axial pressure that commutator may be subject to.On core rod seat, at depression inwall, having appended angle is that outer the moving back of 1 ~ 10 ° pulled out, and has eliminated the radial and axial pressure that commutator may be subject to.Thereby solved the problem that carbon plate cracking that carbon commutator occurs when injection moulding comes off, reduced production cost, stopped hidden danger of quality and product potential risk.
Accompanying drawing explanation
Fig. 1 is the structural representation of positioning module core print seat against pressure for flat carbon commutator injection moulding;
Fig. 2 is the generalized section of positioning module core print seat against pressure for flat carbon commutator injection moulding;
Fig. 3 is core rod seat partial structurtes enlarged diagrams;
Fig. 4 is core rod seat working state structure schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
Positioning module core print seat against pressure for flat carbon commutator injection moulding as depicted in figs. 1 and 2, comprise pedestal 1, for placing the centre bore 2 of mandrel and for placing the depression 3 of commutator, depression 3 is positioned at pedestal 1 one end, centre bore 2 is positioned at depression 3 centers and runs through whole pedestal 1, described centre bore 2 comprises first hole 21 and second hole 22 that connects connection, and the diameter in first described hole 21 is greater than second hole 22.
As shown in Figure 4, first hole 21 is provided with chamfering 23 with second 22 junctions, hole, and mandrel 4 is fixed by stepped hole, allows commutator face and core rod seat keep 0.2-0.3mm gap, injection pressure is acted in axle, eliminated the axial pressure that commutator may be subject to.
As shown in Figure 3, Figure 4, it is that outer the moving back of 5 ° pulls out 31 that depression 3 has been appended angle at inwall, even if there is the situation of injection moulding initial stage discharging opening pressure imbalance when injection moulding, after commutator run-off the straight, the sidewall of commutator and surface yet can not collided and push with core rod seat, have eliminated the radial and axial pressure that commutator may be subject to.
The utility model has solved the problem that carbon plate cracking that carbon commutator occurs when injection moulding comes off, and has reduced production cost, has stopped hidden danger of quality and product potential risk.
Claims (1)
1. a positioning module core print seat against pressure for flat carbon commutator injection moulding, it is characterized in that: comprise pedestal (1), for placing the centre bore (2) of mandrel and for placing the depression (3) of commutator, depression (3) is positioned at pedestal (1) one end, centre bore (2) is positioned at depression (3) center and runs through whole pedestal (1), described centre bore (2) comprises first hole (21) and second hole (22) that connect connection, and the diameter in described first hole (21) is greater than second hole (22); Described first hole (21) is provided with chamfering (23) with junction, second hole (22); On the inwall of described depression (3), establish angle and be outer the moving back of 1 ~ 10 ° and pull out (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420060032.6U CN203739128U (en) | 2014-02-10 | 2014-02-10 | Pressure-prevention positioning mold core seat for planar carbon commutator injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420060032.6U CN203739128U (en) | 2014-02-10 | 2014-02-10 | Pressure-prevention positioning mold core seat for planar carbon commutator injection molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203739128U true CN203739128U (en) | 2014-07-30 |
Family
ID=51338988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420060032.6U Expired - Lifetime CN203739128U (en) | 2014-02-10 | 2014-02-10 | Pressure-prevention positioning mold core seat for planar carbon commutator injection molding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203739128U (en) |
-
2014
- 2014-02-10 CN CN201420060032.6U patent/CN203739128U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140730 |
|
| CX01 | Expiry of patent term |