CN102700078A - Structure for valve needle fixing plug in piston for hot runner system - Google Patents
Structure for valve needle fixing plug in piston for hot runner system Download PDFInfo
- Publication number
- CN102700078A CN102700078A CN2012101323311A CN201210132331A CN102700078A CN 102700078 A CN102700078 A CN 102700078A CN 2012101323311 A CN2012101323311 A CN 2012101323311A CN 201210132331 A CN201210132331 A CN 201210132331A CN 102700078 A CN102700078 A CN 102700078A
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- Prior art keywords
- piston
- fixing plug
- needle
- valve needle
- annular groove
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Abstract
A structure for a valve needle fixing plug in a piston for a hot runner system comprises a piston, and a valve core arranged in a central hole of the piston in a penetrating manner, wherein a fixing plug for fixing the valve core is arranged at the top of the valve core, at least two annular grooves are axially arranged in parallel on the outer side surface where the valve needle fixing plug and the inner wall of the central hole of the piston are contacted, and sealing rings are embedded in the annular grooves. According to the scheme, the problems that a valve needle works unstably as only one sealing ring is arranged between the conventional valve fixing plug and the contact surface of the piston and leakage to cause air leakage are solved.
Description
Technical field
The invention belongs to the TOP-TIP field, relate to a kind of TOP-TIP with the fixing plug structure of piston inner valve needle.
Background technology
In the hot flow path technical application, needle valve system (valve gating) is one of TOP-TIP very general in the hot flow path technical application.This system is through adopting needle (valve pin) under the effect of needle control device, and the mode with mechanical movement opens or closes cast gate in the given time.Above-mentioned control device mainly is made up of cylinder, piston, needle and needle cover.Wherein, as shown in Figure 1, said piston 1 is the cylindrical structural of hollow, and said needle 6 is arranged in the centre bore 2 of said piston 1, and the bottom of stretching out piston 1, and the top of needle is provided with the fixedly plug 3 that is fixed.Offer on contacted of centre bore 2 inwalls of the fixing plug 3 of this needle and piston 1 and offer an annular groove on the lateral surface, be embedded with a sealing ring 4 in this groove,, thereby guarantee the job stability of needle in case leak-stopping gas phenomenon takes place.Though this structure is being used always, also come with some shortcomings, mainly be this fixing plug with the contact-making surface of piston center hole inwall on a sealing ring only is set; Sealing effectiveness is relatively poor; And after long-time the use, the sealing circle follows the string, as can not in time changing; Then be prone to cause gas leakage, thereby influence the stability of needle work.
Therefore, how addressing the above problem, is the content that the present invention will study.
Summary of the invention
The present invention provides a kind of TOP-TIP with the fixing plug structure of piston inner valve needle, and its purpose mainly is to solve between the fixing plug of existing needle and the piston contact-making surface to have only a sealing ring, leaks gas easily, causes the problem of needle job insecurity.
For achieving the above object; The technical scheme that the present invention adopts is: a kind of TOP-TIP is with the fixing plug structure of piston inner valve needle; Comprise piston, be arranged in the spool in the centre bore of said piston, the top of this spool is provided with the fixedly plug that is fixed, on the contacted lateral surface of center bore inner wall of the fixing plug of this needle and piston; Offer at least two annular groove vertically side by side, be embedded with sealing ring in the said annular groove.
Related content in the technique scheme is explained as follows:
1, in the such scheme, on the contacted lateral surface of center bore inner wall of fixing plug of said needle and piston, offers two annular groove vertically side by side.
2, in the such scheme, said sealing ring is the O RunddichtringO.
Because the utilization of present technique scheme, the present invention compared with prior art has advantage:
1, because the present invention fixes on the contacted lateral surface of center bore inner wall of plug and piston at needle; Offer at least two annular groove vertically side by side; In annular groove, be embedded sealing ring, make and effectively improve the gas leakage problem by good sealing effect; And prolonged the service life of the fixing plug of needle, guaranteed the stability of needle work simultaneously.
2, the present invention is simple in structure, practical.
Description of drawings
Accompanying drawing 1 is the prior art structural representation;
Accompanying drawing 2 structural representations of the present invention.
In the above accompanying drawing: 1, piston; 2, centre bore; 3, the fixing plug of needle; 4, sealing ring; 5, annular groove; 6, needle.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Embodiment:
As shown in Figure 2; A kind of TOP-TIP is with the fixing plug structure of piston inner valve needle; Comprise piston 1, be arranged in the spool in the centre bore 2 of said piston 1, the top of this spool is provided with the fixedly plug 3 that is fixed, on the contacted lateral surface of centre bore 2 inwalls of the fixing plug 3 of this needle and piston 1; Offer at least two annular groove 5 vertically side by side, be embedded with sealing ring 4 in the said annular groove 5.
On the contacted lateral surface of centre bore 2 inwalls of fixing plug 3 of said needle and piston 1, offer two annular groove 5 vertically side by side.
Said sealing ring 4 is the O RunddichtringO.
On the contacted lateral surface of center bore inner wall of fixing plug of needle and piston; Offer at least two annular groove vertically side by side; In annular groove, be embedded sealing ring, make and effectively improve the gas leakage problem by good sealing effect; And prolonged the service life of the fixing plug of needle, guaranteed the stability of needle work simultaneously.
The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to let the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (3)
1. a TOP-TIP is with the fixing plug structure of piston inner valve needle; Comprise piston (1), be arranged in the spool in the centre bore (2) of said piston (1); The top of this spool is provided with the fixedly plug (3) that is fixed; It is characterized in that: on the contacted lateral surface of centre bore (2) inwall of fixing plug of this needle (3) and piston (1), offer at least two annular groove (5) vertically side by side, be embedded with sealing ring (4) in the said annular groove (5).
2. TOP-TIP according to claim 1 is with the fixing plug structure of piston inner valve needle; It is characterized in that: on the contacted lateral surface of centre bore (2) inwall of fixing plug of said needle (3) and piston (1), offer two annular groove (5) vertically side by side.
3. TOP-TIP according to claim 1 is with the fixing plug structure of piston inner valve needle, and it is characterized in that: said sealing ring (4) is the O RunddichtringO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101323311A CN102700078A (en) | 2012-04-29 | 2012-04-29 | Structure for valve needle fixing plug in piston for hot runner system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101323311A CN102700078A (en) | 2012-04-29 | 2012-04-29 | Structure for valve needle fixing plug in piston for hot runner system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102700078A true CN102700078A (en) | 2012-10-03 |
Family
ID=46893283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101323311A Pending CN102700078A (en) | 2012-04-29 | 2012-04-29 | Structure for valve needle fixing plug in piston for hot runner system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102700078A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103507234A (en) * | 2013-09-18 | 2014-01-15 | 苏州好特斯模具有限公司 | Adjustable valve-needle piston component |
-
2012
- 2012-04-29 CN CN2012101323311A patent/CN102700078A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103507234A (en) * | 2013-09-18 | 2014-01-15 | 苏州好特斯模具有限公司 | Adjustable valve-needle piston component |
| CN103507234B (en) * | 2013-09-18 | 2018-05-08 | 苏州好特斯模具有限公司 | Adjustable valve-needle piston component |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121003 |