CN202293209U - Automatic glue seal device for valve needle - Google Patents
Automatic glue seal device for valve needle Download PDFInfo
- Publication number
- CN202293209U CN202293209U CN2011203828701U CN201120382870U CN202293209U CN 202293209 U CN202293209 U CN 202293209U CN 2011203828701 U CN2011203828701 U CN 2011203828701U CN 201120382870 U CN201120382870 U CN 201120382870U CN 202293209 U CN202293209 U CN 202293209U
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- CN
- China
- Prior art keywords
- needle
- valve needle
- diameter
- butterfly
- butterfly spring
- 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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Abstract
The utility model provides an automatic glue seal device for a valve needle, which includes a shunting plate, the valve needle and a valve needle sleeve. A butterfly-shaped spring glidingly sleeved on the valve needle is arranged under the lower end surface of the valve needle sleeve in a needle sleeve hole of the shunting plate; the internal diameter of the deformed butterfly-shaped spring is smaller than the diameter of the valve needle, and an inner hole is tightly contacted with a cylindrical surface of the valve needle; and the external diameter of the deformed butterfly-shaped spring is larger than or equal to the diameter of the needle sleeve hole of the shunting plate, and an excircle is tightly contacted with the needle sleeve hole of the shunting plate. The taper angle of the lower end surface of the valve needle sleeve is larger than or equal to that of the deformed butterfly-shaped spring. A step for preventing the butterfly-shaped spring from entering a runner hole is arranged at the joint of the needle sleeve hole of the shunting plate and a hot runner. The automatic glue seal device has the advantages that the automatic glue seal is realized by directly depending on the injection molding pressure during plastic injection molding, the glue seal of the whole structure is provided with double insurance, and the glue leakage possibility at the matched clearance between the valve needle and the valve needle sleeve is greatly lowered.
Description
Technical field
The utility model relates to the plastic mould technical field, relates in particular to the glue sealing structure of the needle cover of the TOP-TIP that is used for mould.
Background technology
Generally speaking, the needle valve TOP-TIP all is the cooperation of leaning between needle cover and the flow distribution plate in the sealing on the flow distribution plate, and the cooperation between needle cover and the needle realizes sealing.But, the accuracy of manufacture of needle cover endoporus and the accuracy of manufacture of needle profile, it is smooth and easy to guarantee that needle moves up and down in the needle cover, again can sealing.So just require the manufacturing tolerance of element very little, the difficult control of process.Therefore needle cover and needle poor fit phenomenon often occur, cooperate slightly then leakiness glue of pine, cooperate slightly tightly then to be prone to stuck needle.
The utility model content
The technical problem that the utility model will solve is: to the deficiency that above-mentioned prior art exists, and the automatic sealing system of the injection pressure when providing a kind of needle valve hot runner mould directly to rely on the plastic cement injection moulding.
The technical scheme that the utility model proposes to the problems referred to above is: the automatic sealing device of needle comprises flow distribution plate, needle and needle cover.The below of the internal valve needle guard lower surface, needle guard hole of flow distribution plate is provided with the butterfly spring that slides on the needle; The endoporus of the butterfly spring after the distortion closely contacts with the face of cylinder of needle, and the cylindrical of the butterfly spring after the distortion closely contacts with the needle guard hole of flow distribution plate.
Internal diameter before the butterfly spring distortion is greater than the diameter of needle, and the internal diameter after the distortion is less than the diameter of needle.External diameter before the butterfly spring distortion is equal to or less than the diameter in the needle guard hole of flow distribution plate, and the external diameter after the distortion is more than or equal to the diameter in the needle guard hole of flow distribution plate.Bevel angle after the bevel angle of needle cover lower surface is out of shape more than or equal to butterfly spring.The needle guard hole of flow distribution plate and the junction of hot flow path are provided with and prevent that butterfly spring from getting into the step in runner hole.
Compared with prior art; Adopt the advantage of the technical scheme of the utility model to be: the automatic sealing of the injection pressure when 1, directly relying on the plastic cement injection moulding; The sealing of whole system has had double insurance; Reduce the leakage glue probability of fit clearance between needle and the needle cover greatly, needle also can pass through the needle cover smoothly, the needle stuck phenomenon can not take place; 2, simple, the advantages of small volume, with low cost of glue sealing structure.
Description of drawings
Fig. 1 is the structural representation of the embodiment that on plastic mould, uses of the utility model.
Fig. 2 is the partial enlarged drawing of embodiment when the injection pressure state of the utility model.
Fig. 3 is the partial enlarged drawing of embodiment when the injection moulding completion status of the utility model.
The specific embodiment
In order to make those skilled in the art understand the technical scheme of the utility model better,, the utility model is done further to specify below in conjunction with accompanying drawing and embodiment.
The needle valve TOP-TIP of this automatic sealing formula is added with a special butterfly spring 4 in the cooperation place of flow distribution plate and needle cover, utilizes injection pressure to reach the needle valve TOP-TIP of sealing.
The structure of the automatic sealing device of needle is as shown in Figure 1, the flow distribution plate 1 of visible plastic mould TOP-TIP, needle 2, needle cover 3, butterfly spring 4 and runner hole 5 among the figure, and heat is chewed and cylinder.Needle cover 3 is installed in the needle guard hole of flow distribution plate 1, and butterfly spring 4 is positioned at the below of needle cover 3, slides on the needle 2.The needle guard hole of flow distribution plate 1 and the junction of hot flow path also are provided with and prevent that butterfly spring 4 from getting into the step in runner hole 5, and butterfly spring 4 is between the lower surface and this step of needle cover 3.
With reference to shown in Figure 2, when cylinder B mouth was ventilated, needle up moved, and cast gate is opened, and plastic cement begins injection moulding.At this moment,, butterfly spring 4 deforms, because of the diameter of the external diameter after the distortion, so the endoporus of butterfly spring 4 closely contacts with the face of cylinder of needle 2 less than needle 2 owing to receiving injection pressure; The external diameter of the butterfly spring 4 after the distortion is more than or equal to the diameter in the needle guard hole of flow distribution plate 1, thus the cylindrical of butterfly spring 4 closely contact with the needle guard hole of flow distribution plate, thereby reach the purpose of sealing.
With reference to shown in Figure 3, after injection moulding is accomplished, no injection pressure in the runner.This moment butterfly spring 4 restore nature states, because of the diameter of the internal diameter before butterfly spring 4 distortion, so gapped between the face of cylinder of the endoporus of butterfly spring 4 and needle 2 greater than needle 2; External diameter before the distortion is equal to or less than the diameter in the needle guard hole of flow distribution plate 1, and no matter whether gapped between the cylindrical of butterfly spring 4 and the needle guard hole, the step in the runner hole 5 is fixed and guarantees its position.The ventilation of cylinder A mouth, needle down moves, and cast gate is closed.
For guaranteeing that butterfly spring 4 has enough deflections under injection pressure, needle overlaps the bevel angle of 3 lower surfaces should be more than or equal to the bevel angle behind butterfly spring 4 maximum distortions.The bevel angle that this embodiment needle overlaps 3 lower surfaces is 145 °.
Foregoing is merely the preferred embodiment of the utility model, is not the utility model is carried out the scope restriction.Those skilled in the art can carry out corresponding flexible or modification very easily according to the main design and the spirit of the utility model.So the protection domain of the utility model should be as the criterion with the covering scope of claim.
Claims (5)
1. the automatic sealing device of needle comprises flow distribution plate (1), needle (2) and needle cover (3); It is characterized in that the below of needle guard hole internal valve needle guard (3) lower surface of flow distribution plate (1) is provided with the butterfly spring (4) that slides on the needle (2); The endoporus of the butterfly spring after the distortion (4) closely contacts with the face of cylinder of needle (2), and the cylindrical of the butterfly spring after the distortion (4) closely contacts with the needle guard hole of flow distribution plate (1).
2. according to the described sealing device of claim 1, it is characterized in that the internal diameter before said butterfly spring (4) distortion is greater than the diameter of needle (2), the internal diameter after the distortion is less than the diameter of needle (2).
3. according to the described sealing device of claim 2, it is characterized in that the external diameter before said butterfly spring (4) distortion is equal to or less than the diameter in the needle guard hole of flow distribution plate (1), the external diameter after the distortion is more than or equal to the diameter in the needle guard hole of flow distribution plate (1).
4. according to the described sealing device of claim 2, it is characterized in that the bevel angle after the bevel angle of said needle cover (3) lower surface is out of shape more than or equal to butterfly spring (4).
5. according to the described sealing device of claim 2, it is characterized in that the needle guard hole of said flow distribution plate (1) and the junction of hot flow path are provided with and prevent that butterfly spring (4) from getting into the step in runner hole (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203828701U CN202293209U (en) | 2011-10-08 | 2011-10-08 | Automatic glue seal device for valve needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203828701U CN202293209U (en) | 2011-10-08 | 2011-10-08 | Automatic glue seal device for valve needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202293209U true CN202293209U (en) | 2012-07-04 |
Family
ID=46362180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203828701U Expired - Fee Related CN202293209U (en) | 2011-10-08 | 2011-10-08 | Automatic glue seal device for valve needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202293209U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104842519A (en) * | 2015-04-22 | 2015-08-19 | 苏州好特斯模具有限公司 | Pilot-operated type valve needle glue sealing system |
| CN104972626A (en) * | 2015-06-01 | 2015-10-14 | 苏州乔布注塑工业有限公司 | Check valve for spiral injection molding machine |
-
2011
- 2011-10-08 CN CN2011203828701U patent/CN202293209U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104842519A (en) * | 2015-04-22 | 2015-08-19 | 苏州好特斯模具有限公司 | Pilot-operated type valve needle glue sealing system |
| CN104842519B (en) * | 2015-04-22 | 2017-07-28 | 苏州好特斯模具有限公司 | A kind of pilot-operated type needle sealing system |
| CN104972626A (en) * | 2015-06-01 | 2015-10-14 | 苏州乔布注塑工业有限公司 | Check valve for spiral injection molding machine |
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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: 20120704 Termination date: 20181008 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |