CN1496806A - Machanism for open and close spray mouthpiece of injection mould - Google Patents
Machanism for open and close spray mouthpiece of injection mould Download PDFInfo
- Publication number
- CN1496806A CN1496806A CNA2003101015896A CN200310101589A CN1496806A CN 1496806 A CN1496806 A CN 1496806A CN A2003101015896 A CNA2003101015896 A CN A2003101015896A CN 200310101589 A CN200310101589 A CN 200310101589A CN 1496806 A CN1496806 A CN 1496806A
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- Prior art keywords
- needle
- plate
- seal
- piston plate
- cavity volume
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- 238000002347 injection Methods 0.000 title claims abstract description 14
- 239000007924 injection Substances 0.000 title claims abstract description 14
- 239000007921 spray Substances 0.000 title 1
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000001746 injection moulding Methods 0.000 claims abstract description 5
- 230000007246 mechanism Effects 0.000 claims description 36
- 230000000295 complement effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims description 2
- 238000002955 isolation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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Abstract
A device for opening and closing injection nozzles in an injection moulding tool. The injection nozzle comprises a nozzle member, the nozzle opening of which can be opened and closed with a needle. The needle is stationarily arranged on a piston plate that is supported in a receptacle such that it can be moved in both axial directions similar to a double-action cylinder. A first work chamber is formed on the side of the piston plate which faces away from the needle and a second work chamber that can be acted upon with a fluid in order to actuate the needle is formed on the opposite side of the piston plate. The needle extends outward from the second work chamber through a recess in an end element that lies opposite of the piston plate. In this case, the second work chamber is sealed in an essentially fluid-tight fashion by means of a first sealing element that is arranged between the inner wall of the receptacle and the piston plate and a second sealing element that is arranged between the wall of the recess and the needle and comes in direct contact with the needle.
Description
Technical field
The present invention relates to a kind of mechanism of injection nozzles of the opening and closing injection molding according to claim 1 preamble, wherein injection nozzles comprises nozzle, and the spout of nozzle can open and close with needle.
Background technology
For example, such mechanism can be used for, but is not specifically designed to, so-called hot runner mould, and the molding mass that wherein carries out processing and forming is expelled in the die cavity with passage, valve and the needle of timing mode by heating.In this case, injection nozzle generally has the form of needle valve or needle nozzle, and wherein syringe needle can be pressed onto the bearing of nozzle, the shape of bearing and needle and having complementary functions, but valve nozzles and leave described cavity volume to open nozzle.
In a kind of known mechanism, needle is arranged on the piston plate that is supported in the cavity volume regularly, making needle can be similar to the double-acting cylinder moves on axially at two, wherein first working chamber forms in the face of the side outside the needle at piston plate, second working chamber forms at the opposite side of piston plate, wherein second working chamber can be actuated needle with the fluid effect, and wherein needle stretches out from the recess that second working chamber passes the part of end, and the end part is with respect to piston plate.A shortcoming of this known mechanisms is that piston plate has bigger quality.If a plurality of needles are set, its structural design will require that bigger space is arranged between the needle or between the injection nozzle.
At the problem that prior art exists, the objective of the invention is to develop the mechanism of introducing type above a kind of, it has less moving mass, and can realize that less space is arranged between the needle adjacent on the surface cell and between a plurality of injection nozzles.
Summary of the invention
Purpose of the present invention is accomplished by a kind of mechanism of the feature with claim 1.
The preferred embodiments of the present invention have constituted the content of appended claims.
The mechanism that is used to open and close the injection nozzle of injection molding according to the present invention comprises needle, can open and close the spout of injection nozzle.In this case, needle is arranged on the piston plate regularly, and piston plate is supported in the cavity volume, can be similar to the double-acting cylinder and move axially at two.Wherein first working chamber piston plate in the face of the outer side of needle forms, second working chamber is in the opposite side formation of piston plate, second working chamber can, as pneumatically or the ground that surges, actuate needle with the fluid effect.Wherein needle stretches out from the recess that second working chamber passes the part of end, and the end part is with respect to described piston plate.
Mechanism according to the present invention is different with the known devices of prior art, second working chamber seals by first seal and second seal in the mode of basic fluid sealing, first seal is arranged between chamber wall and the piston plate, and second seal is arranged between recess and the needle and with needle and directly contacts.In the mechanism of prior art, second working chamber seals fully by the seal that is arranged between cavity volume or recess and the piston plate.In mechanism of the present invention, second working chamber directly seals recess by relative needle and carries out external seal.So not only can reduce the quality of piston plate, closely adjacent a plurality of needles can also be set on piston plate mutually.So just produced mechanism lighter, littler and that cost is lower, can make the space of injection nozzle very compact, and realize compact die cavity.
According to one embodiment of present invention, mechanism comprises base plate, end plate and be arranged on base plate and end plate between the cylinder plate, wherein the cavity volume of piston plate is arranged in the cylinder plate, according to different requirements, the closely adjacent a plurality of cavity volumes that are used for a plurality of piston plates can be set in the cylinder plate.Base plate seals described cavity volume, and promptly the inside of cylinder forms first working chamber, and wherein term " cylinder " not only refers to the cylinder or the rotational symmetric geometry of rule.The end plate closes cavity volume, i.e. the inside of cylinder, and form second working chamber.Can have simple according to mechanism of the present invention like this and the low-cost configuration design.
Because foozle, the connection between base plate and the cylinder plate can not realize sufficiently high sealing effectiveness usually.Basic closed lip ring, as have the form of O type circle, preferably be arranged between base plate and the cylinder plate around cavity volume.When being threaded onto a time-out, base plate and cylinder plate be compressed.
Basic closed lip ring is arranged between cylinder plate and the end plate around cavity volume.
According to another embodiment, the pipeline that is used for fluid inflow and outflow extends to cavity volume from base plate, or directly extends to first working chamber.
Similarly, the pipeline that is used for fluid inflow and outflow extends to cavity volume from end plate, or directly extends to second working chamber.
Piston plate preferably has discoid, complementary with it cavity basically and has the cylindric of standard.
In order to realize reliable fluid isolation between two working chambers, piston plate is provided with the annular groove of basic closure usually on outer circumference surface, and described first seal is arranged in the described groove.First seal preferably has the form of O type circle or ring-type lippacking.
Can select arbitrarily in principle at the recess of end plate and second seal between the needle, as long as sufficiently high sealing effectiveness can be provided.Second seal preferably has the form of O type circle or ring-type lippacking.
In order when using thin or bigger piston plate, to prevent and/or guarantee the reliable radial location of long needle, in another embodiment of the present invention, except that described second seal, the guiding piece of guiding needle is arranged in the recess that the end part is an end plate.This guiding piece for example, can have the form of radial ball bearing.Yet guiding piece preferably has the form of sleeve-like bush(ing) bearing.
In order to prevent that second seal or guiding piece from getting loose unintentionally, in another embodiment of the present invention, be provided with fixture, wherein fixture can be fixed second seal and/or described guiding piece, particularly the mode by prestress.Owing to can pass through the prestress that the seal of compressing O type cast formula is realized, guarantee or improved at least sealing effectiveness.
Fixture for example, can be made of Xi Shi circle folder or locating snap ring simply.But fixture preferably has the form of column bolt, can be threaded onto the internal thread of recess, and wherein fixture comprises and contains axially continuous recess, and needle can extend by recess with slight at least end-play.This form only need simply be installed.
Advantage of the present invention particularly, is less moving mass, and is accomplished by the piston plate that a needle is only arranged in principle.But, two or more needles preferably are set on the piston plate at least.
Description of drawings
Below by with reference to the embodiment that shows in the accompanying drawings, the present invention to be introduced in more detail, accompanying drawing comprises:
Fig. 1 is the diagrammatic vertical sectional view of the mechanism of prior art;
Fig. 2 is first embodiment according to mechanism of the present invention, has the version corresponding with Fig. 1;
Fig. 3 is second embodiment according to mechanism of the present invention, also has the form of schematic cross-sectional structure; With
Fig. 4 is the enlarged drawing of details x among Fig. 3.
The specific embodiment
Fig. 1 has shown the mechanism of prior art.This known mechanism comprises base plate 1, wherein is provided with cylindrical cavity volume 2.The end face of cavity volume 2 is sealed by plate 3.Piston plate 4 is arranged in the cavity volume 2, can axially move in cavity volume 2.Needle 5 is arranged in the piston plate 4, and its end is fixed in the recess of piston plate.Piston plate comprises shoulder 6, and guiding enters the recess 7 of base plate.Second working chamber in Fig. 1 is in minimum position, and it seals by seal 8 that is positioned at the top and the seal 9 that is positioned at the bottom.Because the existence of shoulder 6, piston plate has bigger quality, and in addition, the space between the needle of a plurality of adjacent settings is bigger.
Fig. 2 has shown first embodiment according to mechanism of the present invention, and it comprises cylinder plate 11, wherein is provided with continuous cylindric cavity volume 12.Base plate 13 be arranged on cylinder plate 11 above, and fix on it by the screw that does not show.Seal 14 with O type cast formula is arranged between base plate 13 and the cylinder plate 11, and wherein said seal is around extending continuously in the face of the open circumferential in cavity volume 12 end faces of base plate 13.Be compressed when base plate 13 and cylinder plate 11 are threaded onto a time-out O type circle, two plates are sealed relatively, cavity volume 12 is realized external seals.
Piston plate 17 is arranged in the cavity volume 12 of cylinder plate 11, and it can be moved axially.Piston plate 17 is divided into first working chamber 18 and second working chamber 19 with cavity volume 12.On the outer circumference surface 20 of piston plate 17, be provided with circumferential groove 21, first seal 22 with closed annular O type cast formula wherein is set.Can guarantee freely moving axially of piston plate like this, and the fluid seal isolation of two working chambers 18 and 19.
In addition, pipeline 23 and 24 is separately positioned on base plate 13 and end plate 15, and wherein said pipeline is used to actuate fluid, as compressed air or hydraulic oil, flows to and flows out working chamber 18 and 19.Can be similar to the double-acting cylinder in cavity volume 12 before and after or move up and down piston plate 17.
The continuous recess that the bar 27 of needle 25 also passes end plate 15 extends with very little radial clearance.Second seal 32 with O type cast formula inserts the step-like shoulder of recess 31, and it is fixing wherein with the hold-down screw 33 of prestressed mode by being similar to the post screw, wherein hold-down screw has axially continuous recess, and the whole bar 27 of needle 25 passes recess and extends.This means directly contact needle 25 of seal 32,, can guarantee that needle 25 axially moves freely simultaneously with form external seal second working chamber 19 of fluid sealing.
Embodiment shown in Figure 3 has identical structural design in principle, and it comprises base plate 13, cylinder plate 11 and end plate 15.Compare with the embodiment of Fig. 2, be provided with four adjoining needles 25 on piston plate 17, piston plate 17 axially movable modes move in cavity volume 12.
Piston plate in the present embodiment comprises two parts, i.e. base plate 34 and fixed head 35, on the base plate by being provided with needle 25 with the identical mode of the embodiment that introduces previously.In this embodiment, needle 25 is fixing still by fixed head 35, and fixed head 35 is fixed to base plate 34 by screw 36.
In this case, piston plate seals and realizes the fluid seal isolation by annular lip seals 37 between two working chambers 18 and 19, and annular lip seals is arranged in the groove on the periphery of fixed head 35.
The needle 25 that passes the end plate in the present embodiment hermetically shows in Fig. 4, has shown the enlarged drawing of the details x of Fig. 3.
Claims (15)
1. mechanism that opens and closes the injection nozzles of injection molding, wherein injection nozzles comprises nozzle, the spout of described nozzle adopts needle to open and close.Wherein said needle is arranged on the piston plate that is supported in the cavity volume regularly, can be similar to the double-acting cylinder moves on axially at two, wherein first working chamber forms in a side of facing outside the described needle of described piston plate, can actuate of the opposite side formation of second working chamber of described needle with the fluid effect at described piston plate, wherein said needle stretches out from the recess that second working chamber passes the part of end, described end part is characterized in that with respect to described piston plate
Described second working chamber (19) passes through first seal (22 in the mode of basic fluid sealing, 37) and second seal (32) seal, described first seal is arranged on the inwall and the described piston plate (17 of described cavity volume (12), 34,35) between, described second seal is arranged between the wall and described needle (25) of recess (31), and directly contacts with described needle (25).
2. mechanism according to claim 1, it is characterized in that, described mechanism comprise base plate (13), end plate (15) and be arranged on described base plate (13) and described end plate (15) between cylinder plate (11), wherein said piston plate (17,34,35) described cavity volume is arranged in the described cylinder plate (11), and wherein said base plate seals described cavity volume (12) and forms first working chamber (18), and described end plate (15) seals described cavity volume (12) and forms described second working chamber (19).
3. mechanism according to claim 2 is characterized in that, basic closed lip ring (22,37) is arranged between described base plate (13) and the described cylinder plate (11) around described cavity volume (12).
4. according to claim 2 or 3 described mechanisms, it is characterized in that described base plate (13) comprises the pipeline (23) that leads to described cavity volume (12), be used for fluid inflow and outflow.
5. according to each described mechanism in the claim 2 to 4, it is characterized in that basic closed lip ring (32) is arranged between described cylinder plate (11) and the described end plate (15) around described cavity volume (12).
6. according to each described mechanism in the claim 2 to 5, it is characterized in that described end plate (15) comprises the pipeline (24) that leads to described cavity volume (12), is used for the inflow and the outflow of fluid.
7. according to each described mechanism in the claim 1 to 6, it is characterized in that described piston plate (17,34,35) is essentially discoid, the recess complementary with it (12) has the cylindric of standard.
8. according to each described mechanism in the claim 1 to 7, it is characterized in that the outer circumference surface of described piston plate (17,34,35) is provided with the annular groove (21) of basic closure, described first seal (22,37) is arranged in the described groove.
9. according to each described mechanism in the claim 1 to 8, it is characterized in that described first seal (22,37) can have the form of O type circle or ring-type lippacking.
10. according to each described mechanism in the claim 1 to 19, it is characterized in that described second seal (32) can have the form of O type circle or ring-type lippacking.
11. according to each described mechanism in the claim 1 to 10, it is characterized in that, except that described second seal (32), guide the guiding piece (38) of described needle (25) also to be arranged in the recess (31) that described end part is end plate (15).
12. mechanism according to claim 11 is characterized in that, described guiding piece (38) has the form of sleeve-like bush(ing) bearing.
13. according to each described mechanism in the claim 1 to 12, it is characterized in that, be provided with fixture (33) with fixing described second seal (32) and/or described guiding piece (38) by prestress.
14. mechanism according to claim 13, it is characterized in that, described fixture (33) can be similar to column bolt and be threaded onto described recess (31), described fixture contains axially continuous recess, and described needle (25) extends by described recess with slight end-play at least.
15., it is characterized in that described piston plate (17,34,35) can be provided with two needles (25) at least according to each described mechanism in the claim 1 to 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101015896A CN1496806A (en) | 2002-10-18 | 2003-10-17 | Machanism for open and close spray mouthpiece of injection mould |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20216125.0 | 2002-10-18 | ||
| CNA2003101015896A CN1496806A (en) | 2002-10-18 | 2003-10-17 | Machanism for open and close spray mouthpiece of injection mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1496806A true CN1496806A (en) | 2004-05-19 |
Family
ID=34256600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101015896A Pending CN1496806A (en) | 2002-10-18 | 2003-10-17 | Machanism for open and close spray mouthpiece of injection mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1496806A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101239498B (en) * | 2006-06-19 | 2012-05-30 | 马斯特模具（2007）有限公司 | Valve pin actuating apparatus for hot runner apparatus |
| CN101815603B (en) * | 2007-10-18 | 2013-06-05 | 克劳斯玛菲科技有限公司 | Mould comprising an integrated injector |
| CN103498917A (en) * | 2013-09-02 | 2014-01-08 | 严杰 | Piston special for hot runner system |
| CN103507225A (en) * | 2013-09-30 | 2014-01-15 | 苏州好特斯模具有限公司 | Cylinder fixing component for hot runners |
| CN103547419A (en) * | 2011-02-17 | 2014-01-29 | 赫斯基注塑系统有限公司 | Mold tool system including a runner assembly configured to provide access access to allow access to the assembly |
| CN101941270B (en) * | 2008-08-21 | 2015-06-03 | 马斯特模具（2007）有限公司 | Injection molding apparatus having a nozzle tip component for taking a nozzle out of service |
| CN105479684A (en) * | 2014-09-18 | 2016-04-13 | 柳道万和(苏州)热流道系统有限公司 | Signal oil cylinder for hot runner system |
-
2003
- 2003-10-17 CN CNA2003101015896A patent/CN1496806A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101239498B (en) * | 2006-06-19 | 2012-05-30 | 马斯特模具（2007）有限公司 | Valve pin actuating apparatus for hot runner apparatus |
| CN101815603B (en) * | 2007-10-18 | 2013-06-05 | 克劳斯玛菲科技有限公司 | Mould comprising an integrated injector |
| CN101941270B (en) * | 2008-08-21 | 2015-06-03 | 马斯特模具（2007）有限公司 | Injection molding apparatus having a nozzle tip component for taking a nozzle out of service |
| CN103547419A (en) * | 2011-02-17 | 2014-01-29 | 赫斯基注塑系统有限公司 | Mold tool system including a runner assembly configured to provide access access to allow access to the assembly |
| CN103547419B (en) * | 2011-02-17 | 2015-11-25 | 赫斯基注塑系统有限公司 | Comprise and be configured to provide close to entrance to allow the mold-tool system close to the flow channel component of assembly |
| CN103498917A (en) * | 2013-09-02 | 2014-01-08 | 严杰 | Piston special for hot runner system |
| CN103507225A (en) * | 2013-09-30 | 2014-01-15 | 苏州好特斯模具有限公司 | Cylinder fixing component for hot runners |
| CN105479684A (en) * | 2014-09-18 | 2016-04-13 | 柳道万和(苏州)热流道系统有限公司 | Signal oil cylinder for hot runner system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |