CN201863352U - Injection mold - Google Patents
Injection mold Download PDFInfo
- Publication number
- CN201863352U CN201863352U CN2010206154208U CN201020615420U CN201863352U CN 201863352 U CN201863352 U CN 201863352U CN 2010206154208 U CN2010206154208 U CN 2010206154208U CN 201020615420 U CN201020615420 U CN 201020615420U CN 201863352 U CN201863352 U CN 201863352U
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- CN
- China
- Prior art keywords
- mold
- projection
- mould projection
- heave
- mould
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- 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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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model discloses an injection mold comprising a front mold and a rear mold, wherein the surface of a cavity of the front mold is provided with a front mold heave; the surface of a core of the rear mold is provided with a rear mold heave corresponding to the front mold heave; the front mold heave gradually diminishes from the bottom to the top; the rear mold heave gradually diminishes from the bottom to the top; and the rate of diminishing from the bottom to the top of the front mold heave is larger than that of diminishing from the bottom to the top of the rear mold heave. The injection mold has the benefits that as a through hole is formed by the front mold heave and the rear mold heave, the joint line of a formed element is kept inside so as to ensure that the two openings of the through hole are smooth; and as the length of the front mold heave is smaller than that of the rear mold heave, and the draft angle of the front mold heave is larger than that of the rear mold heave, the formed element is kept on the rear mold during mold unloading, and the formed element is prevented from being pulled and damaged by the front mold and the rear mold.
Description
Technical field
The utility model relates to mould applications, relates in particular to a kind of injection mold.
Background technology
At present, the shell type component of plastic cement material substantially all is to adopt Shooting Technique to make, and especially the louvre of working of plastics is general all by the mould straight forming.In the prior art, the spue line that produces during for fear of plastic piece shaping influences outward appearance, and the parting line of mould is fixed on back mould side, thereby spue line is stayed the inner surface of moulding device, and people can't be seen.
Make the mould of the louvre of prior art, all be on the surface of the die cavity of front mold, projection to be set, and then the louvre of moulding correspondence, so formed in mould shortcoming is: produce spue line on the product inner surface, pulled by front mold easily during the product depanning.
Summary of the invention
In the prior art, often come forming through hole, so then caused the rough of moulding device by the projection that is provided with on the front mold; Especially under the intensive situation of through hole, the projection forming through hole of the mold cavity surface by front mould causes moulding device and front mold adhesion easily or easily the moulding device is pulled.
In order to solve the problems of the technologies described above, the utility model provides a kind of injection mold:
A kind of injection mold comprises front mold and back mould, and the mold cavity surface of described front mold is provided with the front mould projection, and the whose surfaces of described back mould is provided with and the corresponding back of described front mould projection mould projection; To the top, the cross-sectional area of described front mould projection diminishes gradually from the bottom of described front mould projection; To the top, the cross-sectional area of described back mould projection diminishes gradually from the bottom of described back mould projection.
Owing to adopted front mould projection and back mould projection to come forming through hole, make the spue line of front mold and back mould stay in the through hole, thereby guaranteed two opening parts smooth of through hole; Because the front mould projection diminishes gradually from the bottom to the top, back mould projection diminishes gradually from the bottom to the top, makes that the demoulding of moulding device is easy, and front mold and afterwards mould can not pull and damage the moulding device.
The utility model also has following preferred embodiment:
The length of described front mould projection is less than the length of described back mould projection.
The rate of change that diminishes gradually of the cross-sectional area at the bottom of described front mould projection to top is greater than the rate of change that diminishes gradually of the cross-sectional area at bottom to the top of mould projection after described.
The cross-sectional area at the top of described front mould projection is less than the cross-sectional area at the top of described back mould projection.
The length of described back mould projection is the twice of the length of described front mould projection.
The depanning draft angle of described front mould projection is 8
To 10
The depanning draft angle of described back mould projection is 5
To 8
The beneficial effects of the utility model are: owing to form the through hole of moulding device by front mould projection and back mould projection, make spue line stay through hole inside, guaranteed two opening parts smooth of through hole and be more conducive to the demoulding of moulding device; The length of front mould projection is stayed when making the depanning of moulding device on the mould of back, and can not caused the moulding device to be pullled and damage by front mold and back mould less than the depanning draft angle of the length of back mould projection, the front mould projection depanning draft angle greater than back mould projection.
Description of drawings
Fig. 1 is the front mold structural representation of the injection mold of specific embodiment of the utility model;
Fig. 2 is the partial enlarged drawing of the die cavity of Fig. 1;
Fig. 3 is the back mould structure schematic diagram of the injection mold of specific embodiment of the utility model;
Fig. 4 is the partial enlarged drawing of the core of Fig. 2;
Fig. 5 is in the specific embodiment after the demoulding, the cutaway view of the partial view of the assembly drawing of front mold, moulding and back mould.
The specific embodiment
As shown in Figure 1 and Figure 4, injection mold comprises front mold 1 and back mould 2, be arranged on the front mould projection A on die cavity 8 surfaces on the front mold 1, be arranged on the back mould projection B on core 7 surfaces on the mould 2 of back, when making up with back mould 2, front mold 1 on the surface of the surface of relative front mold 1 and back mould 2, is equipped with reference column 6 and locating hole 9; As shown in Figure 5, the length h of front mould projection A is less than the length H of back mould projection B, from the bottom of front mould projection A to the top, the cross-sectional area of front mould projection A diminishes gradually, from the bottom of back mould projection B to the top, back mould projection B diminishes gradually, and the depanning draft angle η of front mould projection A is greater than the depanning draft angle θ of back mould projection B, and the area of the top end face of front mould projection A is less than the area of the top end face of back mould projection B.
As shown in Figure 5, moulding device 3 is injection molded by plastics ABS resin (acrylonitrile-styrene-butadiene copolymer), and the ratio of the length h of the length H of back mould projection B and front mould projection A is 2:1, and the depanning draft angle θ of back mould projection B is 5
To 8
, the depanning draft angle η of front mould projection A is 8
To 10
, in the through hole of moulding device 3, A is preceding nib 4 accordingly with the front mould projection, with the corresponding Kong Weihou nib 5 of back mould projection B.
When by this moulding device of injection mold injection mo(u)lding, the spue line of front mould projection A and back mould projection B is then in through hole, compare by the front mold forming through hole with in the prior art, the advantage of this programme is: two opening parts smooth that has guaranteed through hole, and the pressure that makes the protruding A of front mould be subjected to the moulding device is littler, be more conducive to the demoulding of moulding device, avoid the moulding device to be pullled and damage by front mold or back mould.
Because the length h of front mould projection A is less than the length H of back mould projection B, the depanning draft angle η of front mould projection A is greater than the depanning draft angle θ of back mould projection B, in the process in the demoulding after 3 moulding of moulding device, just more help moulding device 3 and stay on the mould 2 of back, also avoided the moulding device to be pullled and damage simultaneously by front mold or back mould.
The depanning draft angle θ of back mould projection B is 5
To 8
, the depanning draft angle η of front mould projection A is 8
To 10
, the length H of back mould projection B is 2:1 with the length h ratio of front mould projection A, is under the ABS resin situation in the material of moulding device, this scheme is a preferred plan, can guarantee fully the moulding device the smooth demoulding and can by front mold or afterwards mould not pull and damage.
Because the depanning draft angle of front mould projection A is greater than the depanning draft angle of the protruding B of back mould, and the area at the top of front mould projection A makes that less than the area at the top of back mould projection B the openings of sizes of preceding nib 4 and back nib 5 is close.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (7)
1. an injection mold comprises front mold and back mould, and it is characterized in that: the mold cavity surface of described front mold is provided with the front mould projection, and the whose surfaces of described back mould is provided with and the corresponding back of described front mould projection mould projection; To the top, the cross-sectional area of described front mould projection diminishes gradually from the bottom of described front mould projection; To the top, the cross-sectional area of described back mould projection diminishes gradually from the bottom of described back mould projection.
2. as claim 1 described injection mold, it is characterized in that: the length of described front mould projection is less than the length of described back mould projection.
3. as claim 1 described injection mold, it is characterized in that: the rate of change that diminishes gradually of the cross-sectional area at the bottom of described front mould projection to top, greater than the rate of change that diminishes gradually of the cross-sectional area at bottom to the top of mould projection after described.
4. as claim 1 described injection mold, it is characterized in that: the cross-sectional area at the top of described front mould projection is less than the cross-sectional area at the top of described back mould projection.
5. as claim 2 described injection molds, it is characterized in that: the length of described back mould projection is the twice of the length of described front mould projection.
6. as claim 3 described injection molds, it is characterized in that: the depanning draft angle of described front mould projection is 8
To 10
7. as claim 3 described injection molds, it is characterized in that: the depanning draft angle of described back mould projection is 5
To 8
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206154208U CN201863352U (en) | 2010-11-19 | 2010-11-19 | Injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206154208U CN201863352U (en) | 2010-11-19 | 2010-11-19 | Injection mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201863352U true CN201863352U (en) | 2011-06-15 |
Family
ID=44134518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206154208U Expired - Fee Related CN201863352U (en) | 2010-11-19 | 2010-11-19 | Injection mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201863352U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104220225A (en) * | 2012-02-13 | 2014-12-17 | 日本电气英富醍株式会社 | Resin molding mold, resin molding method and resin molding product |
| CN113619026A (en) * | 2020-05-08 | 2021-11-09 | 上海汽车集团股份有限公司 | Automobile map bag forming die, stamping equipment and manufacturing method |
-
2010
- 2010-11-19 CN CN2010206154208U patent/CN201863352U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104220225A (en) * | 2012-02-13 | 2014-12-17 | 日本电气英富醍株式会社 | Resin molding mold, resin molding method and resin molding product |
| CN104220225B (en) * | 2012-02-13 | 2015-12-02 | Nec平台株式会社 | Die for molding resin, resin molding method and synthetic resin |
| US9393726B2 (en) | 2012-02-13 | 2016-07-19 | Nec Platforms, Ltd. | Resin molding die, resin molding method and resin molded product |
| CN113619026A (en) * | 2020-05-08 | 2021-11-09 | 上海汽车集团股份有限公司 | Automobile map bag forming die, stamping equipment and manufacturing method |
| CN113619026B (en) * | 2020-05-08 | 2024-07-05 | 上海汽车集团股份有限公司 | Automobile map bag forming die, stamping equipment and manufacturing method |
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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: 20110615 Termination date: 20151119 |
|
| EXPY | Termination of patent right or utility model |