CN204955269U - There is not shrink trace injection moulding end cover part structure - Google Patents
There is not shrink trace injection moulding end cover part structure Download PDFInfo
- Publication number
- CN204955269U CN204955269U CN201520730799.XU CN201520730799U CN204955269U CN 204955269 U CN204955269 U CN 204955269U CN 201520730799 U CN201520730799 U CN 201520730799U CN 204955269 U CN204955269 U CN 204955269U
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- CN
- China
- Prior art keywords
- hollow cylinder
- end cover
- cover part
- injection moulding
- end cap
- 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 - Fee Related
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
For solving the easy problem that produces the shrink trace in surface that prior art injection moulding end cover part exists, the utility model provides a there is not shrink trace injection moulding end cover part structure, this structure includes circular chassis and hollow cylinder inserts, circular chassis outward flange is two bellied concentric rings, rings in the excircle ring sum promptly, the ring outside is provided with the circular arc fixed block of taking connect the via hole outside including, is provided with the strengthening rib between ring and the hollow cylinder inserts, the hollow cylinder inserts is before the end cover part injection moulding fashioned hollow cylinder in advance, inlay when end cover part injection moulding in the relevant position of forming die's die cavity and with other parts injection moulding together, circular chassis and hollow cylinder's material is the same. The utility model discloses there is not shrink trace injection moulding end cover part structure's useful technological effect is that the surface of end cover part does not have the shrink trace, inside bubble -free, and outward appearance elegant appearance not only, but also have higher intensity and rigidity.
Description
Technical field
The utility model relates to plastic part injection molding technology, particularly a kind of ungauged regions trace injection molding end cap design of part.
Background technology
End cap part generally includes chassis and hollow cylinder two parts, is mainly used in protection or the support of instrument body end face.
End cap part belongs to typical super thick moulding.In injection mo(u)lding, the wall thickness of plastics is generally 1 ~ 4mm, and the moulding usually wall thickness being greater than 6mm is heavy section casting.Client is because of demands such as product-forming, performance, using function, and there will be the even solid superthick moulding of some heavy walls, these heavy section castings easily produce the defect such as indenture and contraction.Chassis thickness general control is at below 6mm, and hollow cylinder axial width is greater than 6mm, even reaches about 50mm.Because axial width between the two exists larger difference, when injection mo(u)lding, hollow cylindrical axial shrinkage wants neighbour near position more serious.Because the axial width of hollow cylinder is comparatively large, the differing greatly of surface temperature and core layer temperature during cooling, surface easily first cools, and internal cooling comparatively slowly, namely cools slower part and will produce depression on surface.Usually, the depression that this outer surface caused because cooling velocity is different is formed is referred to as to shrink trace.The generation of shrinking trace has had a strong impact on the shaping of plastic part, and the especially appearance requirement of plastic part surface, as the case surface etc. of instrument and meter.At present, the method reducing plastic surface contraction trace mainly contains two kinds, one adopts material modification (increasing glass fibre or other materials), by increasing the technological parameters such as stuffing pressure, dwell pressure and dwell time, after part is filled substantially, there is higher density, in pressure maintaining period, still have seldom amount material to continue to be filled in die cavity, this method can improve contraction trace, but can not well eliminate contraction trace.The another kind of method of shrinking trace that reduces is amendment mould structure, and namely at the local surcharge cast gate that plastic part thickness is thick, the method can improve contraction trace, but still can not well eliminate contraction trace.Visible, prior art injection-molded plastic part also exists surface and easily produces the problem of shrinking trace.
Summary of the invention
The surface existed for solving prior art injection mo(u)lding end cap part easily produces the problem of shrinking trace, the utility model proposes a kind of ungauged regions trace injection molding end cap design of part.
The utility model ungauged regions trace injection molding end cap design of part comprises circular base plate and hollow cylinder inserts; Described circular base plate outward flange is two protruding donuts, i.e. outer toroid and interior annulus; There is the circular arc fixed block of band connecting through hole in outer toroid arranged outside, between interior annulus and hollow cylinder inserts, be provided with reinforcement; Described hollow cylinder inserts is hollow cylinder shaping in advance before the injection mo(u)lding of end cap part, is embedded in the relevant position of the die cavity of mould and injection mo(u)lding together with other parts when the injection mo(u)lding of end cap part.
Further, described circular base plate is identical with the material of hollow cylinder.
Further, the junction of described hollow cylinder and circular base plate is provided with and inlays notch.
The Advantageous Effects of the utility model ungauged regions trace injection molding end cap design of part is the surperficial ungauged regions trace of end cap part, and leaving no air bubbles inside, not only appearance looks elegant is generous, but also has higher intensity and rigidity.
Accompanying drawing explanation
Accompanying drawing 1 is the schematic perspective view of the utility model ungauged regions trace injection molding end cap design of part.
Accompanying drawing 2 is the upward view of the utility model ungauged regions trace injection molding end cap design of part.
Accompanying drawing 3 is the a-a face sectional view of accompanying drawing 2.
Accompanying drawing 4 is the A portion enlarged drawing of accompanying drawing 3.
Below in conjunction with the drawings and specific embodiments, the utility model ungauged regions trace injection molding end cap design of part is described further.
Detailed description of the invention
Accompanying drawing 1 is the schematic perspective view of the utility model ungauged regions trace injection molding end cap design of part, accompanying drawing 2 is the top view of the utility model ungauged regions trace injection molding end cap design of part, and accompanying drawing 3 is the a-a face sectional view of accompanying drawing 2, and accompanying drawing 4 is the A portion enlarged drawing of accompanying drawing 3, in figure, 1 is circular base plate, and 2 is hollow cylinder inserts, and 3 is outer toroid, 4 is interior annulus, 5 is connecting through hole, and 6 is circular arc fixed block, and 7 is reinforcement.As seen from the figure, the utility model ungauged regions trace injection molding end cap design of part comprises circular base plate 1 and hollow cylinder inserts 2; Described circular base plate 1 outward flange is two protruding donuts, i.e. outer toroid 3 and interior annulus 4; There is the circular arc fixed block 6 of band connecting through hole 5 in outer toroid 3 arranged outside, between interior annulus 4 and hollow cylinder inserts 2, be provided with reinforcement 7; Described hollow cylinder inserts 2 is hollow cylinder shaping in advance before the injection mo(u)lding of end cap part, is embedded in the relevant position of the die cavity of mould and injection mo(u)lding together with other parts when the injection mo(u)lding of end cap part.Because the hollow cylinder inserts of the utility model ungauged regions trace injection molding end cap design of part is shaping in advance before the injection mo(u)lding of end cap part, the relevant position of the die cavity of mould is embedded in and injection mo(u)lding together with the other parts of end cap part when the injection mo(u)lding of end cap part, although the axial width of hollow cylinder is larger, but because it is shaping in advance, there is not the problem of cooling meat, can not with the other parts (as: circular base plate of end cap part, interior annulus, the part such as outer toroid and reinforcement) produce and the contraction trace that cause inconsistent due to its cooling velocity.In addition, for increasing the bonding strength of hollow cylinder and circular base plate, can be provided with in the junction of hollow cylinder and circular base plate and inlay notch (as shown in Figure 4), make hollow cylinder inserts and other parts after injection moulding, form the structure of mutually inlaying, be firmly connected to each other.Obviously, hollow cylinder inserts is chosen for the ad hoc structure of the present embodiment, can according to the concrete structure feature intending injection molded parts, partial resolution larger for thickness is out formed independently parts, after it is shaping in advance, the relevant position of the die cavity of mould is embedded in and injection mo(u)lding together with the other parts of one-piece parts when one-piece parts is shaping, make the cooling velocity of one-piece parts each several part when cooling unanimous on the whole, thus reduce the possibility of bubble and the generation of contraction trace.For ensureing the serviceability of injection mo(u)lding end cap part, described circular base plate is identical with the material of hollow cylinder, makes the end cap part after injection mo(u)lding have identical material.
Obviously, the Advantageous Effects of the utility model ungauged regions trace injection molding end cap design of part is the surperficial ungauged regions trace of end cap part, and leaving no air bubbles inside, not only appearance looks elegant is generous, but also has higher intensity and rigidity.
The foregoing is only preferred embodiment of the present utility model; be not limited to the utility model; for a person skilled in the art; all within spirit of the present utility model and principle; any amendment of doing, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (3)
1. ungauged regions trace injection molding end cap design of part, comprises circular base plate and hollow cylinder inserts; Described circular base plate outward flange is two protruding donuts, i.e. outer toroid and interior annulus; There is the circular arc fixed block of band connecting through hole in outer toroid arranged outside, between interior annulus and hollow cylinder inserts, be provided with reinforcement; Described hollow cylinder inserts is hollow cylinder shaping in advance before the injection mo(u)lding of end cap part, is embedded in the relevant position of the die cavity of mould and injection mo(u)lding together with other parts when the injection mo(u)lding of end cap part.
2. ungauged regions trace injection molding end cap design of part according to claim 1, it is characterized in that, described circular base plate is identical with the material of hollow cylinder.
3. ungauged regions trace injection molding end cap design of part according to claim 1, it is characterized in that, the junction of described hollow cylinder and circular base plate is provided with inlays notch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520730799.XU CN204955269U (en) | 2015-09-21 | 2015-09-21 | There is not shrink trace injection moulding end cover part structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520730799.XU CN204955269U (en) | 2015-09-21 | 2015-09-21 | There is not shrink trace injection moulding end cover part structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204955269U true CN204955269U (en) | 2016-01-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520730799.XU Expired - Fee Related CN204955269U (en) | 2015-09-21 | 2015-09-21 | There is not shrink trace injection moulding end cover part structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204955269U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105619699A (en) * | 2016-03-23 | 2016-06-01 | 上海东杰高分子材料有限公司 | Embedding method for embedded part inside product |
| CN109648780A (en) * | 2018-10-22 | 2019-04-19 | 惠州市华阳光电技术有限公司 | A method of prevent LED light shell plastic cement products from shrinking |
-
2015
- 2015-09-21 CN CN201520730799.XU patent/CN204955269U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105619699A (en) * | 2016-03-23 | 2016-06-01 | 上海东杰高分子材料有限公司 | Embedding method for embedded part inside product |
| CN109648780A (en) * | 2018-10-22 | 2019-04-19 | 惠州市华阳光电技术有限公司 | A method of prevent LED light shell plastic cement products from shrinking |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160113 Termination date: 20170921 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |