CN203004232U - Plastic leakage-preventing coordination structure of valve needle and valve needle sleeve of injection mold - Google Patents
Plastic leakage-preventing coordination structure of valve needle and valve needle sleeve of injection mold Download PDFInfo
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- CN203004232U CN203004232U CN 201220728206 CN201220728206U CN203004232U CN 203004232 U CN203004232 U CN 203004232U CN 201220728206 CN201220728206 CN 201220728206 CN 201220728206 U CN201220728206 U CN 201220728206U CN 203004232 U CN203004232 U CN 203004232U
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- valve needle
- conical surface
- needle
- circular hole
- outer conical
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Abstract
The utility model discloses a plastic leakage-preventing coordination structure of a valve needle and a valve needle sleeve of an injection mold. The plastic leakage-preventing coordination structure comprises a valve needle and a valve needle sleeve matched with the valve needle through a circular hole, and is characterized in that the top of the valve needle is expanded in diameter to form an outer circular conical surface, and simultaneously, at least one inverter outer circular conical surface is formed under the outer circular conical surface and used for bearing injection pressure so as to closely press the outer circular conical surface of the valve needle to the lower outlet of the circular hole of the valve needle sleeve. The plastic leakage-preventing coordination structure is capable of bearing the injection pressure as the inverted outer circular conical surface is designed on the valve needle; and the outer circular conical surface on the valve needle is closely pressed to the lower outlet of the circular hole of the valve needle sleeve under squeezing of the injection pressure so that the valve needle is ensured to be always in close fit with the lower outlet of the circular hole on the valve needle sleeve; as a result, plastic leaking gap influence caused by attrition is eliminated and plastic leakage is effectively prevented; therefore, the injection effect is improved and the production cost is saved.
Description
Technical field
The utility model belongs to needle valve type injection-moulding device technical field, is specifically related to a kind of needle and valve needle cover glue-leakage-resistant fit structure of injection mold.
Background technology
Needle in existing needle valve type injection-moulding device and valve needle cover are all that simple circular hole coordinates usually, needle and exit, circular hole lower end inevitably can produce wearing and tearing, especially when needle bears unbalanced injection pressure in injection moulding process, this wearing and tearing will be more violent, the result that causes after the circular hole wearing and tearing is leaked glue exactly, affect the injection moulding effect, and the waste material.
Summary of the invention
The utility model purpose is: needle and valve needle cover glue-leakage-resistant fit structure that a kind of injection mold is provided, this structure can make the exit, circular hole lower end on needle and valve needle cover fit tightly all the time by injection pressure, the leakage glue gap affects that elimination causes because of wearing and tearing, effectively preventing from cementing leakage.
The technical solution of the utility model is: a kind of needle of injection mold and valve needle cover glue-leakage-resistant fit structure, comprise needle and the valve needle cover that coordinates by circular hole with needle, it is characterized in that on described needle that hole enlargement forms an outer conical surface, also form at least one outer conical surface of falling simultaneously and be used for bearing injection pressure and hold out against exit, circular hole lower end to valve needle cover with the aforementioned outer conical surface with needle below described outer conical surface.
The internal conical surface further preferred, that exit, the circular hole lower end inwall hole enlargement formation one described in the utility model on valve needle cover coordinates with the outer conical surface on described needle.
Further preferred, the outer conical surface bottom of needle described in the utility model connects one section face of cylinder, the bottom on the described face of cylinder with fall the top of outer conical surface and be connected.
The utility model has the advantages that:
During actual injection moulding, the utility model is owing to being designed with down outer conical surface on needle, therefore can bear injection pressure, and the outer conical surface on needle is held out against exit, circular hole lower end at valve needle cover under the extruding of injection pressure, guarantee that the exit, circular hole lower end on needle and valve needle cover fits tightly all the time, eliminate the leakage glue gap affects that causes because of wearing and tearing, effectively preventing from cementing leakage, thereby help to improve the injection moulding effect, save production cost.
Description of drawings
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is the first structural representation of the present utility model (non-injection moulding state);
Fig. 2 is the second structural representation of the present utility model (injection moulding state);
Wherein: 1, needle; 1a, outer conical surface; 1b, the outer conical surface of falling; 1c, the face of cylinder; 2, valve needle cover; 3, circular hole; 3a, internal conical surface; F, injection pressure.
The specific embodiment
Embodiment: in conjunction with Fig. 1, shown in Figure 2, the needle of this injection mold that the present embodiment provides and valve needle cover glue-leakage-resistant fit structure, its formation is the same with routine techniques, the valve needle cover 2 that has needle 1 and coordinate by circular hole 3 with needle 1, improvement is: on described needle 1, hole enlargement forms an outer conical surface 1a, and circular hole 3 exit, the lower end inwall hole enlargements on described valve needle cover 2 form an internal conical surface 3a who coordinates with outer conical surface 1a on described needle 1.Also form a 1b of falling the outer conical surface on described needle 1 below described outer conical surface 1a simultaneously.
One section face of cylinder 1c of outer conical surface 1a bottom connection of needle described in the present embodiment 1, the bottom of described face of cylinder 1c is connected with the top of the 1b of falling the outer conical surface.
In conjunction with shown in Figure 2, during actual injection moulding, the present embodiment is owing to being designed with the 1b of falling the outer conical surface on needle 1, therefore can bear injection pressure F, and in circular hole 3 exits, lower end that under the extruding of injection pressure F, the outer conical surface 1a on needle 1 held out against at valve needle cover 2, the internal conical surface 3a that guarantees outer conical surface 1a and valve needle cover 2 circular hole 3 exits, lower end fits tightly all the time, the leakage glue gap affects that elimination causes because of wearing and tearing, effective preventing from cementing leakage, thereby help to improve the injection moulding effect, save production cost.
Certainly above-described embodiment only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalent transformation or modifications of doing according to the Spirit Essence of the utility model main technical schemes are within all should being encompassed in protection domain of the present utility model.
Claims (3)
1. the needle of an injection mold and valve needle cover glue-leakage-resistant fit structure, comprise needle (1) and the valve needle cover (2) that coordinates by circular hole (3) with needle (1), it is characterized in that the upper hole enlargement of described needle (1) forms an outer conical surface (1a), also form simultaneously at least one outer conical surface (1b) of falling in described outer conical surface (1a) below and be used for bearing injection pressure (F) and hold out against circular hole (3) exit, lower end to valve needle cover (2) with the aforementioned outer conical surface (1a) with needle (1).
2. the needle of injection mold according to claim 1 and valve needle cover glue-leakage-resistant fit structure is characterized in that circular hole (3) exit, lower end inwall hole enlargement on described valve needle cover (2) forms an internal conical surface (3a) that coordinates with outer conical surface (1a) on described needle (1).
3. the needle of injection mold according to claim 1 and 2 and valve needle cover glue-leakage-resistant fit structure, outer conical surface (1a) bottom that it is characterized in that described needle (1) connects one section face of cylinder (1c), and the bottom of the described face of cylinder (1c) is connected with the top of outer conical surface (1b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220728206 CN203004232U (en) | 2012-12-26 | 2012-12-26 | Plastic leakage-preventing coordination structure of valve needle and valve needle sleeve of injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220728206 CN203004232U (en) | 2012-12-26 | 2012-12-26 | Plastic leakage-preventing coordination structure of valve needle and valve needle sleeve of injection mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203004232U true CN203004232U (en) | 2013-06-19 |
Family
ID=48595861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220728206 Expired - Fee Related CN203004232U (en) | 2012-12-26 | 2012-12-26 | Plastic leakage-preventing coordination structure of valve needle and valve needle sleeve of injection mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203004232U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112827751A (en) * | 2020-12-31 | 2021-05-25 | 南京理工大学 | Pure-mechanism sealed glue injection device and method |
-
2012
- 2012-12-26 CN CN 201220728206 patent/CN203004232U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112827751A (en) * | 2020-12-31 | 2021-05-25 | 南京理工大学 | Pure-mechanism sealed glue injection device and 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20201226 |