CN102672923A - Closed type ejection rod used for external gas assisted injection molding - Google Patents
Closed type ejection rod used for external gas assisted injection molding Download PDFInfo
- Publication number
- CN102672923A CN102672923A CN2012101284529A CN201210128452A CN102672923A CN 102672923 A CN102672923 A CN 102672923A CN 2012101284529 A CN2012101284529 A CN 2012101284529A CN 201210128452 A CN201210128452 A CN 201210128452A CN 102672923 A CN102672923 A CN 102672923A
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- push rod
- ejects
- injection molding
- sealing ring
- closed type
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Abstract
The invention discloses a closed by ejection rod used for external gas assisted injection molding, which is characterized by comprising an ejection end of the ejection rod, a seal ring, a fixed end of the ejection rod and a bolt, wherein the ejection end and the fixed end of the ejection rod are fixedly connected with each other by the bolt, the seal ring is arranged at the side where the ejection end of the ejection rod is contact with a core, a groove which can prevent the seal ring from moving during the motion of the ejection rod is arranged at the side where the ejection end of the ejection rod is contacted with the seal ring, and the seal ring is fixedly connected with the ejection end of the ejection rod by the groove. The ejection rod has good seal property, the ejection rod moves smoothly, and the seal ring is not easy to get aged and is convenient to change.
Description
Technical field
The present invention relates to a kind of end closed type push rod that is used for extraneous gas assisted injection molding process.
Background technology
In injection moulding, the application of air-auxiliary injection forming (hereinafter to be referred as " gas auxilliary ") more and more widely, wherein extraneous gas assisted injection molding (hereinafter to be referred as " outer auxilliary ") is a kind of emerging technology.In the auxilliary outside process, because gas is in the plastic surface action, the sealing of die cavity is vital for the influence of gas action effect, and the push rod place then is that gas leaks one of the most serious place.
Leak gas for the push rod place; Common solution is on the inner push rod of push rod template, to overlap sealing ring; Though the method can guarantee the sealing of die cavity to a certain extent, this mode has but influenced the motion of push rod greatly, has also quickened the aging and wearing and tearing of sealing ring simultaneously.Because sealing ring is inner in template, after its ageing failure, replacing has become a great problem again.
Summary of the invention
The push rod place is poorly sealed in the existing outer assist mold, the push rod motion is not smooth and the aging problem of changing difficulty of sealing ring in order to overcome; The invention provides a kind of seal request that can either guarantee die cavity in the outer auxilliary process; Do not influence the proper motion in practical process again, change the closed type push rod that is used for the extraneous gas assisted injection molding easily simultaneously.
The technical scheme that the present invention adopts is:
A kind of closed type push rod that is used for the extraneous gas assisted injection molding; It is characterized in that: comprise that push rod ejects end, sealing ring, push rod stiff end and bolt; Said push rod ejects end and is connected through said bolt with stiff end and fixes, and said push rod ejects holds a side that contacts with core to be provided with said sealing ring.
Further, said push rod ejects holds a side that contacts with said sealing ring to be provided with the groove that prevents that sealing ring is moved in the push rod motion process, and said sealing ring ejects end through said groove and said push rod and is fixedly connected.
Further, be with a pad on the said bolt.
Further, said push rod ejects the end face size of the end face size of end greater than said stiff end, makes the said end that ejects with plastic bigger contact area arranged, and destroys plastic when preventing to eject.
Further, said push rod ejects and holds the side that contacts with core to be made as the difficult inclined-plane that interlocks with the core generation.
Further, said sealing ring is provided with the annular projection auxiliary seal.
Method for using of the present invention:
When the mould matched moulds, said push rod is strained in push pedal makes the sealing ring that ejects end compress core, reaches the effect of sealing; When the mould die sinking, the said end that ejects ejects plastic and gets final product.
Because mostly outer auxilliary plastic is thin plate class plastic,, the end face that ejects end that contacts with plastic want ambassador itself and plastic bigger contact area to be arranged, destruction plastic when preventing to eject so being made as than the end face of stiff end; Simultaneously in order to prevent because the staggered push rod that influences takes place with core in the distortion of push rod easily moves, contact a side with core and be designed to the inclined-plane so push rod ejects to hold.
For convenient for assembly, push rod is divided into push rod ejects end and push rod stiff end two parts, the middle bolt that adopts connects; Bolt hinders the push rod motion when preventing die sinking, needs during use stay counterbore in corresponding template.
Beneficial effect of the present invention is embodied in: push rod place good airproof performance, push rod move smooth and easy and sealing ring is difficult for aging and it is convenient to change.
Description of drawings
Fig. 1 is a push rod installation diagram of the present invention.
Fig. 2 is the push rod sketch map under the matched moulds state of the present invention.
Fig. 3 is the push rod sketch map under the die opening state of the present invention.
The specific embodiment
With reference to Fig. 1; A kind of closed type push rod that is used for the extraneous gas assisted injection molding; Characteristics are to comprise that push rod ejects end 1, sealing ring 2, push rod stiff end 4 and bolt 3; Said push rod ejects end 1 and is connected through said bolt 3 with stiff end 4 and fixes, and said push rod ejects holds 1 side that contacts with core 7 to be provided with said sealing ring 2.
Further, said push rod ejects end 1 side that contacts with said sealing ring 2 and is provided with the groove that prevents that sealing ring 2 is moved in the push rod motion process, and said sealing ring 2 ejects through said groove and said push rod holds 1 to be fixedly connected.
Further, be with a pad on the said bolt 3.
Further, said push rod ejects the end face size of the end face size of end 1 greater than said stiff end 4, makes the said end 1 that ejects with plastic bigger contact area arranged, and destroys plastic when preventing to eject.
Further, said push rod ejects end 1 side that contact with core and is made as and is difficult for the inclined-plane that interlocks with core 7 generations.
Further, said sealing ring 2 is provided with the annular projection auxiliary seal.
With reference to Fig. 2 and Fig. 3, method for using of the present invention:
When mould 6 matched moulds, the said push rod of push pedal 5 tensions makes the sealing ring 2 that ejects end 1 compress core 7, reaches the effect of sealing; When mould 6 die sinkings, the said end 1 that ejects ejects plastic and gets final product.
Because mostly outer auxilliary plastic is thin plate class plastic, so want ambassador itself and plastic that the end face that ejects end that contacts with plastic is made as than stiff end end face have bigger contact area, destruction plastic when preventing to eject; Simultaneously in order to prevent because the staggered push rod that influences takes place with core in the distortion of push rod easily moves, contact a side with core and be designed to the inclined-plane so push rod ejects to hold.
For convenient for assembly, push rod is divided into push rod ejects end and push rod stiff end two parts, the middle bolt that adopts connects; Bolt hinders the push rod motion when preventing die sinking, needs during use stay counterbore 8 in corresponding template.
The described content of this specification embodiment only is enumerating the way of realization of inventive concept; Should not being regarded as of protection scope of the present invention only limits to the concrete form that embodiment states, protection scope of the present invention also reach in those skilled in the art conceive according to the present invention the equivalent technologies means that can expect.
Claims (6)
1. closed type push rod that is used for the extraneous gas assisted injection molding; It is characterized in that: comprise that push rod ejects end, sealing ring, push rod stiff end and bolt; Said push rod ejects end and is connected through said bolt with stiff end and fixes, and said push rod ejects holds a side that contacts with core to be provided with said sealing ring.
2. a kind of closed type push rod that is used for the extraneous gas assisted injection molding as claimed in claim 1; It is characterized in that: said push rod ejects holds a side that contacts with said sealing ring to be provided with the groove that prevents that sealing ring is moved in the push rod motion process, and said sealing ring ejects end through said groove and said push rod and is fixedly connected.
3. a kind of closed type push rod that is used for the extraneous gas assisted injection molding as claimed in claim 2 is characterized in that: be with a pad on the said bolt.
4. a kind of closed type push rod that is used for the extraneous gas assisted injection molding as claimed in claim 3; It is characterized in that: said push rod ejects the end face size of the end face size of end greater than said stiff end; Make the said end that ejects bigger contact area arranged, destroy plastic when preventing to eject with plastic.
5. a kind of closed type push rod that is used for the extraneous gas assisted injection molding as claimed in claim 4 is characterized in that: said push rod ejects holds the side that contacts with core to be made as the difficult inclined-plane that interlocks with the core generation.
6. like the described a kind of closed type push rod that is used for the extraneous gas assisted injection molding of one of claim 1～5, it is characterized in that: said sealing ring is provided with the annular projection auxiliary seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210128452.9A CN102672923B (en) | 2012-04-27 | 2012-04-27 | A kind of closed type push rod for extraneous gas assisted injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210128452.9A CN102672923B (en) | 2012-04-27 | 2012-04-27 | A kind of closed type push rod for extraneous gas assisted injection molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102672923A true CN102672923A (en) | 2012-09-19 |
| CN102672923B CN102672923B (en) | 2015-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210128452.9A Active CN102672923B (en) | 2012-04-27 | 2012-04-27 | A kind of closed type push rod for extraneous gas assisted injection molding |
Country Status (1)
| Country | Link |
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| CN (1) | CN102672923B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030224080A1 (en) * | 2000-04-21 | 2003-12-04 | Ronald Thomas | Automated pin for gas assisted injection molding |
| CN201201320Y (en) * | 2008-04-21 | 2009-03-04 | 中山市利群精密实业有限公司 | Plastic mould with ejecting structure |
| CN201283629Y (en) * | 2008-11-21 | 2009-08-05 | 宁波远东制模有限公司 | Automatic shedding apparatus for deep cylinder mould ejection |
| CN201579953U (en) * | 2009-12-01 | 2010-09-15 | 福州联鸿精密模具有限公司 | Car lamp deep-cavity mould with heat source controller pneumatic push-out structure |
| CN202592687U (en) * | 2012-04-27 | 2012-12-12 | 浙江工业大学 | Ejection rod used in external gas-assisted injection molding |
-
2012
- 2012-04-27 CN CN201210128452.9A patent/CN102672923B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030224080A1 (en) * | 2000-04-21 | 2003-12-04 | Ronald Thomas | Automated pin for gas assisted injection molding |
| CN201201320Y (en) * | 2008-04-21 | 2009-03-04 | 中山市利群精密实业有限公司 | Plastic mould with ejecting structure |
| CN201283629Y (en) * | 2008-11-21 | 2009-08-05 | 宁波远东制模有限公司 | Automatic shedding apparatus for deep cylinder mould ejection |
| CN201579953U (en) * | 2009-12-01 | 2010-09-15 | 福州联鸿精密模具有限公司 | Car lamp deep-cavity mould with heat source controller pneumatic push-out structure |
| CN202592687U (en) * | 2012-04-27 | 2012-12-12 | 浙江工业大学 | Ejection rod used in external gas-assisted injection molding |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102672923B (en) | 2015-08-05 |
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