CN1289279C - Valve device of nozzle in injection moulding machine - Google Patents
Valve device of nozzle in injection moulding machine Download PDFInfo
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- CN1289279C CN1289279C CN 00130700 CN00130700A CN1289279C CN 1289279 C CN1289279 C CN 1289279C CN 00130700 CN00130700 CN 00130700 CN 00130700 A CN00130700 A CN 00130700A CN 1289279 C CN1289279 C CN 1289279C
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- valve pin
- nozzle
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Abstract
The present invention relates to a valve device of a nozzle in an injection moulding machine, which comprises a piston for determining vertical cylindrical space. The piston has a lower area and an upper area; in the lower area, molten resin is injected into a mould hollow cavity by the nozzle; in the upper area, the nozzle is connected to a cylinder body for supplying the molten resin by a connecting fitting. The piston also has a supporting area for vertically supporting a valve pin to make the valve pin vertically move. The supporting area for the valve pin crosses over the cylindrical space of the piston along the diametrical direction. The central area of the supporting area for the valve pin of the piston has a hole for supporting the head of the valve pin to make the valve pin stretch downwards along the vertical direction. In the valve device, an optimal piston stroke can be obtained, and the dimension of the valve device can be minimized. Therefore, the present invention is suitable for moulding resin products with small dimensions.
Description
Technical field
The present invention relates to a kind of valving, it is used for producing the injection molding machine of plastic resin product, especially relate to such valving, it comprises a piston of determining the vertical cylindrical space therein, piston has the compresses lower section that can partly hold nozzle, nozzle is applicable to molten resin is injected in the mold cavity, and the top section that can partly hold connector, connector is applicable to nozzle is connected to the cylinder body that is used to supply molten resin, piston also has a valve pin supporting area that makes the vertical support valve pin, makes valve pin to move both vertically.In this valving, not only may obtain best piston stroke, and can make the size of valving reduce to minimum.So valving is applicable to the undersized naval stores of molding.In addition, the structure of piston can prevent that heat (it is by being used to prevent that the heater that molten resin is cured from being produced when sending to) from the filler that is used to provide along piston surfaces externally and internally sealing function directly being provided, thereby prevents that filler is impaired.
Background technology
Usually, injection molding machine is used for the manufacturing of plastic resin product.In this injection molding machine, resin material to be packed in the cylinder body, cylinder body is the resin material that is loaded into of fusion again.The resin material of fusion is sent in the runner, and the nozzle by being communicated with runner injects in the cavity of the mold of being made up of upper and lower mold district then.In the mold cavity, after the filling molten resin material, carry out resin solidification.Behind the resin solidification, the upper and lower mold district of mold is separated from each other, to take out the product of molding.In this injection molding machine, owing to finished the filling of molten resin in cavity, runner and mold after separating, the resin residue that is called burr is present near in the part mold cavity of nozzle injection port.This burr should be removed by next process.In order to eliminate this shortcoming, a kind of valving has been proposed, it has can eliminate the structure that burr forms.For example, in the practical sample plane No. 96556 of the Korea S that is presented to the present patent application people, this valving has been described.In the valving of this practicality model machine explanation, the cylinder body with hydraulic pressure or Pneumatic pressure operated piston is arranged in the runner.A valve pin is connected with piston, thus it according on the piston/down motion, be used to open or close the injection port of nozzle.
In this valving, hydraulic pressure or air pressure cylinder body are set on the pipeline that is arranged in runner, thereby by pipeline the resin of fusion are injected the mold cavity and do not adopt any resin channels.This structure is applicable to such situation: need many this moment and be applicable to the inlet that molten resin is injected the mold cavity, with the large-sized naval stores of molding.But the problem that this valving exists is that it can not the undersized naval stores of molding, needs to adopt the mold with single inlet this moment.
In order to address this problem, the another kind of valving that is suitable for molding small size naval stores has been proposed.For example, in the Korea S that is presented to the present patent application people practical sample plane No. 116226 (publication No. 97-6954), this valving has been described.But this valving also relates to various shortcomings.For example, this valving is compared with used nozzle, and volume is huger.This is owing to hydraulic pressure or air pressure cylinder body (it is included in and moves the valve pin that is applicable to the opening and closing nozzle in the valving) are arranged on a side of nozzle.In addition, by the guide link that is arranged on the nozzle valve pin is connected on the piston that is positioned at hydraulic pressure or air pressure cylinder body indirectly.Thus, valve pin can not move in the vertical direction.Valve pin may be made CONTACT WITH FRICTION with guide link, causes the wearing and tearing of guide link thus.This may cause molten resin along the guide link leakage that is worn and the inefficacy of valve pin.For this reason, need often to safeguard and repair.
Summary of the invention
So, according to the problems referred to above that in conventional valving, relate to the present invention has been proposed, the purpose of this invention is to provide a kind of valving that comprises a piston, piston has the structure that can access best stroke, to prevent the inefficacy of valve pin (valve pin is applicable to and opens and closes the injection port that is used for molten resin is injected the nozzle of mold), reduce the size of valving as far as possible, and prevent that heat (heat is by being used to prevent that the heater that molten resin is cured from being produced when sending to) from the filler that is used to provide along piston surfaces externally and internally sealing function directly being provided, thereby prevent that filler is impaired.
According to the present invention, a kind of valving is provided, be used for opening and closing selectively the cavity that is connected mold and the nozzle between the cylinder body, described cylinder body is by being connected and the connector that is connected with upper end of nozzle in its lower end with the cylinder body lower end in the top, be used for the molten resin material that will inject is sent into the cavity of mold, connector has a resin channels, be used for molten resin material is delivered to the vertical injection passage that is limited to nozzle from cylinder body, nozzle has an injection port, described injection port is formed on the lower end of injection passage and is connected with the cavity of mold, by being contained in the injection passage and being subjected to the valve pin of valving control to open and close injection port selectively, valving comprises: a vertically extending hollow cylinder shell, described shell has the top board and the base plate that is contained in the shell lower end that is contained in the shell upper end and is provided with upper shed, also comprise a guiding/anti-plate that expands, it upwards stretches into the cylindrical space of piston from the upper surface of base plate, described guiding/anti-expands plate and contacts with the compresses lower section of the cylindrical sector of piston at least, in cylinder blanket, be limited with a vertical cylindrical space that holds connector fully, make the connector upper end that is connected with cylinder body be positioned at upper shed place, held the top section of nozzle simultaneously at least; A cylindrical piston, it around connector and sealed nozzle be fitted in the shell, make piston be in vertical reciprocating motion along the shell between top board and the base plate, cylindrical piston has a vertical cylindrical section, this vertical cylindrical section is limited with the vertical cylindrical space within it, this vertical cylindrical space segment ground has held connector and nozzle, and described cylindrical piston has a circumferential piston district, this circumferential piston district selectively thereon, bear hydraulic pressure on the lower surface or air pressure makes reciprocating motion of the pistons; Wherein the valve pin supportive device comprises a bars that is integral with the piston work, makes it stride across cylindrical space along diametric(al) and extend that the central section of bars is provided with a hole, is used to support the head of valve pin, makes valve pin vertically stretch out downwards; Be used to wherein allow that the device that the valve pin supportive device vertically moves comprises a groove that is formed on the connector lower end, make it extend along diametric(al), groove has held bars, and has the degree of depth of the vertical stroke length of the bars of being not less than; The valve pin supportive device is applicable to when being supported by cylindrical piston and is supporting valve pin, makes it for vertical movement according to the up-and-down movement of piston, vertical thus mobile valve pin; And when the piston up-and-down movement, allow the device that the valve pin supportive device is for vertical movement.
According to the present invention, this purpose is reached, because a valving is provided, open and close the nozzle that between cavity and mold, connects selectively, and provide a cylinder body, by being connected and the connector that is connected with upper end of nozzle in its lower end with the cylinder body lower end in the top, be used for the molten resin material that will inject is sent into the mold cavity, connector has a resin channels, be used for molten resin material delivered to from cylinder body and determine the vertical injection passage of nozzle, nozzle has an injection port, it is formed on the lower end of injection passage and is connected with the mold cavity, by being contained in the injection passage and being subjected to the valve pin of valving control to open and close injection port selectively, valving comprises: a vertically extending hollow cylinder shell, shell has the top board and the base plate that is contained in the shell lower end that is contained in the shell upper end and is provided with upper shed, in cylinder blanket, determined a vertical cylindrical space that holds connector fully, make the connector upper end that is connected with cylinder body be positioned in the upper shed, held the top section of nozzle simultaneously at least; Cylindrical piston around connector and sealed nozzle be fitted in the shell, make piston be in vertical reciprocating motion along the shell between top board and the base plate, cylindrical piston has a vertical cylindrical district that determines the vertical cylindrical space, connector and nozzle have partly been held, and has a circumferential piston district,, bear hydraulic pressure on the lower surface or air pressure makes reciprocating motion of the pistons selectively thereon; A valve pin supportive device is applicable to when being supported by cylindrical piston is supporting valve pin, makes it for vertical movement according to the up-and-down movement of piston, vertical thus mobile valve pin; And one allowed the device that the valve pin supportive device is for vertical movement when the piston up-and-down movement.
The valve pin supportive device can comprise that one makes whole bars with piston, makes it stride across cylindrical space along diametric(al), is provided with a hole on the center of bars, is used to support the head of valve pin, makes valve pin vertically stretch out downwards.Allow that the device that the valve pin supportive device vertically moves can comprise a groove that forms in the connector lower end, make it extend along diametric(al), groove has held bars, and has the degree of depth that is not less than bars vertical stroke length.
Description of drawings
Describe from following embodiment with reference to accompanying drawing, other purpose of the present invention and characteristic will become clearly, wherein:
Fig. 1 is the decomposition diagram of expression valving of the present invention;
Fig. 2 is the cutaway view of valving, the pent state of expression nozzle; And
Fig. 3 is the cutaway view of valving, the state that the expression nozzle is opened.
The specific embodiment
With reference to Fig. 1 and 2, valving of the present invention has been described respectively.
As illustrated in fig. 1 and 2, be connected with a cylinder body (not shown) with the valving of the present invention of numbering 1 expression, cylinder body is used for the molten resin that will inject is sent in the cavity of mold.By being connected with the cylinder body lower end in the top and the connector 19 that is connected with nozzle 2 upper ends in its lower end, valving 1 is applicable to and opens and closes a nozzle 2 that is connected between cylinder body and the mold cavity (being designated by numeral 6) selectively.Connector 19 has a resin channels 17, is used for molten resin material is delivered to the vertical injection passage of determining at nozzle 2 from cylinder body.Nozzle has an injection port 5, and it is formed on the lower end of injection passage and is connected to the cavity 6 of mold.The valve pin 4 that is contained in the injection passage and controlled by valving opens and closes injection port selectively.
Valving 1 comprises a hollow cylinder blanket 9.Top board 10 and base plate 11 are contained in the upper and lower end of shell 9 respectively.Top board 10 is connected with cylinder body in the top.Shown in the situation, top board 10 has a hollow cylinder structure, it has comprised the cylindrical space with upper shed and under shed.The cylindrical space of top board 10 opening thereon is communicated with cylinder body, is communicated with determining the cylindrical space in shell 9 at its under shed.The under shed of top board 10 has and the identical diameter of shell 9 upper sheds, thus top board 10 have an inner surface continuously to shell 9 inner surface section of definite shell 9 upper sheds.Base plate 11 has a central opening, and columniform guiding/protection is stretched out plate 12 from the upper surface of base plate 11 upwards extend into cylindrical space around the shell 9 of central opening.Nozzle 2 is arranged to stationary state, makes its top section be directed to/protect to stretch out plate 12 to surround.
Piston 3 has columniform structure, and is fitted in the inside of shell 9 hermetically, makes it vertically to move back and forth between top board 10 and base plate 11 along shell 9.Piston 3 has the cylindrical plate 3a that stretches out that stretches out from piston 3 lower surfaces downwards downwards, and the cylindrical ejecting plate 3b that extends upwardly that protrudes upward from piston 3 upper surfaces.Stretch out guiding/protection that plate 3a is fitted in base plate 11 hermetically downwards and stretch out around the plate 12, make it stretch out plate 12 and vertically move back and forth along guiding/protection.Piston 3 is by downwards and extend upwardly ejecting plate 3a and 3b determines in vertical cylindrical space 13.Extend upwardly in the upper shed that ejecting plate 3b is fitted in shell 9 hermetically, make it vertically to move back and forth along the continuous inner surface that shell 9 upper sheds and top board 10 cylindrical spaces form.Piston 3 also has along the valve pin supporting area 16 of the strip of diametric(al) extension, and it has the supporting hole 14 of a center valve pin head.Valve pin 4 vertically extends through the vertical injection passage of determining in nozzle 2, and it matches with the center valve pin head supporting hole 14 of piston 3 at its head.In the drawings, the head of valve pin 4 is designated by numeral 15.When piston 3 up-and-down movements, valve pin 4 moves both vertically in the injection passage of nozzle 2, opens and closes the injection port 5 of nozzle 2 thus.
Also provide a pair of hydraulic pressure or pneumatic fluid chamber Ca and Cb that piston 3 is in vertical reciprocating motion.In the compresses lower section of shell 9, determined chamber Ca by the circumferential lower surface of the inner surface of shell 9, piston 3 and the outer surface that stretches out plate 3a downwards.In the top section of shell 9, determined chamber Cb by the circumferential upper surface of the inner surface of shell 9, piston 3 and the outer surface that extends upwardly ejecting plate 3b.For hydraulic pressure or pneumatic fluid are sent into chamber Ca and Cb, perhaps fluid is discharged chamber Ca and Cb, on shell 9, be provided with a pair of fluid passage a and b respectively.Each bar of fluid passage a and b all is connected between one of corresponding chamber Ca and Cb and hydraulic pressure or the baric systerm (not shown).
In the inside of top board 10, a connector 19 has been installed regularly, make its upper end be fixed to the upper end of top board 10.Expose by the opening of top board 10 upper end of connector 19, thereby it is connected with cylinder body.Connector 19 extend into downwards in the cylindrical space 13 of piston 3, thereby it has a lower end, extends beyond the strip valve pin supporting area 16 of piston 3 downwards.For this reason, be provided with the groove 18 that extends along diametric(al) on the lower surface of connector 19, this groove is applicable to the valve pin supporting area 16 that holds piston 3.The lower end of connector 19 is fixedly attached to the upper end of nozzle 2, and nozzle is contained in the cylindrical space 13 of piston 3 by base plate 11.Therefore, nozzle 2 is maintained fixed state.The degree of depth of the groove 18 of connector 19 is not less than the vertical stroke length of the valve pin supporting area 16 of piston 3.In illustrated situation, the groove 18 of connector 19 has and the corresponding degree of depth of valve pin supporting area 16 vertical stroke length.Also be provided with a resin channels 17 of between connector 19 upper and lower ends, extending on the connector 19.Resin channels 17 is communicated with the upper end of resin channels 7 in being formed on nozzle 2.The vertical injection passage of nozzle 2 is led in the lower end of resin channels 7.Therefore, can be by determining the resin channels 17 and 7 in connector 19 and nozzle 2 respectively, and the injection passage of nozzle 2, molten resin is delivered to the injection port 5 of nozzle 2 from cylinder body.
Adopt this set, can rely on according to piston 3 and move back and forth the vertical reciprocal valve pin 4 opening and closing injection ports 5 of work, selectively the molten resin of delivering to injection port 5 is injected in the cavity 6 of mold.
In the accompanying drawings, numbering 20 and 21 has been represented respectively the heater that is provided with around connector 19 and nozzle 2.Heater 20 and 21 is used for preventing being cured sending to by the molten resin of cylinder body supply.
The operation of the valving with the invention described above structure is described now.
If wish to adopt valving of the present invention that the molten resin material of cylinder body supply is injected mold, then at first the injection port 5 of nozzle 2 be connected with the cavity 6 of mold.At this moment, valving is in its original state, and wherein piston 3 remains on the lower position of closing injection port 5.Under this state, by determining the resin channels 17 and 7 in connector 19 and nozzle 2 respectively, and the injection passage of nozzle 2, molten resin material 8 is delivered to the injection port 5 of nozzle 2 from cylinder body.But molten resin material 8 can not inject in the cavity 6 of mold, because injection port 5 is closed by valve pin 4.Under this state, then, come the pressure fluid of self-hydraulic or baric systerm (not shown) to be fed in the Ca of chamber by fluid passage a.Introduce of the lower surface pressurization of the pressure fluid of chamber Ca, piston 3 is moved up piston 3.At this moment, the fluid that may exist among the Cb of chamber is discharged to hydraulic pressure or the baric systerm from chamber Cb.When piston 3 moved up, the valve pin 4 that is contained on the valve pin supporting area 16 of piston 3 also moved up.Thereby the injection port 5 of nozzle 2 is opened.Therefore, molten resin material 8 is injected in the cavity 6 of mold.After molten resin material 8 injection molds are finished, the pressure fluid that comes self-hydraulic or baric systerm (not shown) is fed in the Cb of chamber by fluid passage b.Introduce of the upper surface pressurization of the pressure fluid of chamber Cb, piston 3 is moved down piston 3.At this moment, the fluid that may exist among the Ca of chamber is discharged to hydraulic pressure or the baric systerm from chamber Ca.When piston 3 moved down, valve pin 4 moved down.Closed the injection port 5 of nozzle 2 thus.Therefore, molten resin material 8 does not reinject in the cavity 6 of mold.
Moving both vertically of piston 3 made make its last end in contact that extends upwardly ejecting plate 3b and shell 9, its plate 3a that stretches out downwards stretches out plate 12 with the guiding/protection of base plate 11 and contacts.Therefore, produce by heater 20 and 21, be used to prevent that the heat that molten resin 8 is cured from can directly not pass to the filler that is used to provide along piston 3 surfaces externally and internally sealing functions when sending to.So, can prevent that filler is impaired.
Because valve pin 4 is become it can vertically be moved by valve pin supporting area 16 vertical support of piston 3, thereby the stroke of piston 3 directly is transformed on the valve pin 4.Particularly, nozzle 2 partly is contained in the cylindrical space 13 of piston 3.Therefore, might make the stroke of piston 3 best or minimum.Also may make the size of valving reduce to minimum.
Clearly find out from foregoing description, the invention provides a valving, it comprises a piston of determining the vertical cylindrical space therein, piston has the compresses lower section that can partly hold nozzle, nozzle is applicable to molten resin is injected in the mold cavity, and having the top section that can partly hold connector, connector is applicable to nozzle is connected to the cylinder body that is used to supply molten resin.Piston also has a valve pin supporting area that makes the vertical support valve pin, makes valve pin to move both vertically.Therefore, it not only may obtain best piston stroke, and can make the size of valving reduce to minimum.So valving of the present invention is suitable for the undersized naval stores of molding.In addition, the extending upwardly on ejecting plate place and the shell end in contact and stretch out plate place and the guiding/protection of base plate downwards at it when stretching out plate and contacting of piston, piston is in vertical reciprocating motion.Therefore, the filler that is used to provide along piston surfaces externally and internally sealing function directly is not provided heat (it is by being used to prevent that the heater that molten resin is cured from being produced when sending to).So, can prevent that filler is impaired.
Though purpose has illustrated the preferred embodiments of the present invention as an example, person skilled in the art person it will be appreciated that, can make various modifications, replenishes and substitute, and do not deviate from the scope of the invention and the spirit that illustrates in claims.
Claims (1)
1. valving, be used for opening and closing selectively the cavity that is connected mold and the nozzle between the cylinder body, described cylinder body is by being connected and the connector that is connected with upper end of nozzle in its lower end with the cylinder body lower end in the top, be used for the molten resin material that will inject is sent into the cavity of mold, connector has a resin channels, be used for molten resin material is delivered to the vertical injection passage that is limited to nozzle from cylinder body, nozzle has an injection port, described injection port is formed on the lower end of injection passage and is connected with the cavity of mold, by being contained in the injection passage and being subjected to the valve pin of valving control to open and close injection port selectively, valving comprises:
A vertically extending hollow cylinder shell, described shell has the top board and the base plate that is contained in the shell lower end that is contained in the shell upper end and is provided with upper shed, also comprise a guiding/anti-plate that expands, it upwards stretches into the cylindrical space of piston from the upper surface of base plate, described guiding/anti-expands plate and contacts with the compresses lower section of the cylindrical sector of piston at least, in cylinder blanket, be limited with a vertical cylindrical space that holds connector fully, make the connector upper end that is connected with cylinder body be positioned at upper shed place, held the top section of nozzle simultaneously at least;
A cylindrical piston, it around connector and sealed nozzle be fitted in the shell, make piston be in vertical reciprocating motion along the shell between top board and the base plate, cylindrical piston has a vertical cylindrical section, this vertical cylindrical section is limited with the vertical cylindrical space within it, this vertical cylindrical space segment ground has held connector and nozzle, and described cylindrical piston has a circumferential piston district, this circumferential piston district selectively thereon, bear hydraulic pressure on the lower surface or air pressure makes reciprocating motion of the pistons;
Wherein the valve pin supportive device comprises a bars that is integral with the piston work, makes it stride across cylindrical space along diametric(al) and extend that the central section of bars is provided with a hole, is used to support the head of valve pin, makes valve pin vertically stretch out downwards;
Be used to wherein allow that the device that the valve pin supportive device vertically moves comprises a groove that is formed on the connector lower end, make it extend along diametric(al), groove has held bars, and has the degree of depth of the vertical stroke length of the bars of being not less than;
The valve pin supportive device is applicable to when being supported by cylindrical piston and is supporting valve pin, makes it for vertical movement according to the up-and-down movement of piston, vertical thus mobile valve pin; And
When the piston up-and-down movement, allow the device that the valve pin supportive device is for vertical movement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00130700 CN1289279C (en) | 2000-10-20 | 2000-10-20 | Valve device of nozzle in injection moulding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00130700 CN1289279C (en) | 2000-10-20 | 2000-10-20 | Valve device of nozzle in injection moulding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1349880A CN1349880A (en) | 2002-05-22 |
| CN1289279C true CN1289279C (en) | 2006-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00130700 Expired - Fee Related CN1289279C (en) | 2000-10-20 | 2000-10-20 | Valve device of nozzle in injection moulding machine |
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| Country | Link |
|---|---|
| CN (1) | CN1289279C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109382972A (en) * | 2018-12-03 | 2019-02-26 | 和卓喷嘴阀门系统（宁波）有限公司 | A kind of forming method of shut-off nozzles and the shut-off nozzles |
| CN110549563A (en) * | 2019-10-18 | 2019-12-10 | 浙江恒道科技有限公司 | Single-point needle valve hot runner system |
| CN114379029A (en) * | 2022-01-17 | 2022-04-22 | 浙江恒道科技有限公司 | Hot runner nozzle heating system |
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2000
- 2000-10-20 CN CN 00130700 patent/CN1289279C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1349880A (en) | 2002-05-22 |
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Granted publication date: 20061213 Termination date: 20171020 |
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