CN100534755C - Needle valve type spray nozzle - Google Patents
Needle valve type spray nozzle Download PDFInfo
- Publication number
- CN100534755C CN100534755C CNB2005100714731A CN200510071473A CN100534755C CN 100534755 C CN100534755 C CN 100534755C CN B2005100714731 A CNB2005100714731 A CN B2005100714731A CN 200510071473 A CN200510071473 A CN 200510071473A CN 100534755 C CN100534755 C CN 100534755C
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- needle
- valve
- spring
- hole
- fairlead
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Abstract
A needle valve type nozzle with adjustable opening of needle valve and better thermal balance for injection moulding is composed of a nozzle body with hole, a nozzle head, a needle valve sleeved by a spiral spring to form a spiral flow channel and with an axial movement regulating structure at its front end, a heat conducting sleeve and a guide sleeve embedded in said hole of said nozzle body.
Description
Technical field
The present invention relates to the fluid tip structure, particularly the injection-moulding nozzle structure.
Background technology
Existing injection-moulding nozzle, as No. 3566627 disclosed types of Japan Patent, see also Fig. 1, comprise nozzle head 10, heat transfer jacket 30, spring 40, needle-valve, wherein nozzle head 10 is provided with jet hole 11, and the head 21 of needle-valve inserts wherein, leading section 31 and these head 21 adjacency of heat transfer jacket 30, the axial region 23 of needle-valve is provided with spring 40, and 41 pairs of needle-valves of Passscheiben use restraint; During injection moulding, the head 21 protruding jet holes 11 of needle-valve, the plastics that heat is melted just pass through the neck 22 of needle-valve from the space between needle-valve and the heat transfer jacket 30, ejection from jet hole 11 again; Also show nozzle body 12, projection 24, step 13.
There is following shortcoming in this structure:
1, this needle-valve is to make needle-valve 20 remain on a center by 2,3 support points, and injected plastics material shunting (2-3) layer converges the back and penetrates near jet hole, and the flow velocity difference on the jet hole circumference can produce the current mark phenomenon, influences the attractive in appearance of product.
2, the circumferential section of heat transfer jacket front end (near the jet hole place) is not homogeneous continuous (2,3 breach is arranged), and the thermal heat transfer capability of heat transfer jacket is descended and near the non-uniform temperature of jet hole, influences the heat endurance of jet hole.
3, the runner of nozzle is present in the ring section within spring endoporus and the needle-valve external diameter, or the ring section between the internal diameter of the external diameter of spring and heat transfer jacket, very big at spring wire through the viscous flow part of material around, cause the bad and material burning problem of colour changing, also can influence the aesthetic property of product.
4, generally, in the needs double end or when more bull spray valve uses simultaneously, position intensity in the junction (welding line, trace) that two-way or multi-way stream material converge mutually is relatively poor, uses the position (as the junction being moved to the position of reinforcement) of mobile junction to guarantee product quality usually; Because the scope that the plastics of the big nozzle of flow ejection cover is wide, the scope that the plastics of the nozzle ejection that flow is little cover is then little, so can residing position, control connection place (welding line, trace) by each road nozzle flow size of adjusting; But the disclosed type of above-mentioned patent, its needle-valve can not move axially and regulate, promptly can not regulate the size of flow of material, so in the needs double end or when more bull spray valve uses simultaneously, the residing position, junction (welding line, trace) that its very difficult control two-way or multi-way stream material converge mutually influences product structure intensity.
In addition, it is along the axis ejection that needle jet (as the cylinder needle jet) commonly used penetrates material, collides mold cavity usually and break-in, mobile poor.
Summary of the invention
The object of the present invention is to provide a kind of novel injection moulding needle jet, overcome the above-mentioned shortcoming of prior art.
For achieving the above object, solution of the present invention is: a kind of needle jet, comprise nozzle body, nozzle head, needle-valve, heat transfer jacket, also comprise a fairlead, this fairlead is embedded in the pilot hole of nozzle body, axially movable, which is provided with the inflow entrance and the needle-valve locating hole of liquid plastic, be arranged with spring on this needle-valve, tail end inserts in this locating hole.
Further, this needle-valve front portion is provided with horn shape continuous on the circumference; The neck of this needle-valve front end and the circular hole of heat transfer jacket are jointly in the anterior structure that forms circular runner of nozzle; This spring is to make the structure that forms spiral flow channel in the nozzle.
This needle-valve locating hole is a screwed hole, and the needle-valve that inserts this screwed hole is provided with the screw thread that is mated; The front end of this needle-valve is provided with can regulate the axially movable structure of this needle-valve; This can regulate the axially movable structure of this needle-valve can be the type that can cooperate common hand tools to use; The type can be that the needle-valve front end face is provided with " one " font or " ten " font or equilateral groove.The front end of this spring is fixed on the heat transfer jacket, and the tail end of this spring is fixed on the fairlead; For example, front end is connected on the heat transfer jacket, and tail end is connected on the fairlead.
The tail end of this spring and front end spatially are that the central point about spring is centrosymmetric and arranges.
An end of the pilot hole of this nozzle body be provided with to an end of this fairlead carry out the axial constraint limited step, and be provided with the groove that prevents this fairlead rotation in the position of this limited step.The end face of heat transfer jacket carries out axial constraint to the fairlead other end.Fairlead can move axially in the pilot hole of nozzle body.
This spring is to make the structure that forms spiral flow channel in the nozzle; The pitch of this spring is greater than the jet hole diameter.
Owing to adopted such scheme, the present invention that following advantage is arranged:
The nozzle needle front portion is provided with horn shape continuous on the circumference, and it is along axis ejection collision mold cavity that the guide effect of its convection cell can avoid penetrating material, improves liquidity.The strong point and supporting surface are not established in the nozzle needle front portion, and the neck of this needle-valve front end circular hole cylindrical and thermal conductivity good heat transfer cover makes the circular runner of the anterior formation of nozzle extend to jet hole.Can solve near the non-uniform temperature of jet hole and the problem of the material flow velocity difference on the jet hole circumference.Adopt the coarse pitch spring, the space between the pitch of spring wire footpath forms the spirality stream, can significantly reduce the viscous flow part of material, and its mixed effect helps the homogenizing material.The needle-valve rear end is connected with fairlead by screw thread, when needle-valve produces rotation relatively to fairlead, can change the axial location of needle-valve with respect to jet hole, can be provided with " one " font at the needle-valve front end face, " ten " font or equilateral groove, but be used under the state of injection molded, arbitrarily the open size in control valve doorway.Needle-valve can move axially and regulate, can regulate the size of flow of material, so in the needs double end or when more bull spray valve uses simultaneously, can control the residing position, junction (welding line, trace) that two-way or multi-way stream material converge mutually, guarantee that product structure intensity adheres to specification.Can solve the current mark problem of moulding, improve the effect of the colour changing of reloading, reduce internal stress, effectively improve the moulding performance.
Description of drawings
Fig. 1 is existing nozzle arrangements schematic diagram;
Fig. 2 is that an embodiment of the present invention stereochemical structure is cutd open and shown schematic diagram;
Fig. 3 is that schematic diagram (needle-valve is in open mode) is shown in embodiment illustrated in fig. 2 cuing open;
Fig. 4 is that schematic diagram (needle-valve is in closed condition) is shown in embodiment illustrated in fig. 2 cuing open.
The specific embodiment
See also accompanying drawing 2-4, a kind of injection moulding needle jet comprises nozzle body 1, nozzle head 4, needle-valve 6, heat transfer jacket 5, also comprises a fairlead 2, and fairlead 2 has makes needle-valve 6 remain on the center and with the effect of needle-valve 6 in axial location.2 are provided with spring on the fairlead, this fairlead 2 is embedded in the pilot hole 116 of nozzle body, which is provided with the inflow entrance 117 of liquid plastic, needle-valve locating hole 9 and the alignment pin 10 that is used for fixing spring, be arranged with spring 3 on the needle-valve 6, tail end inserts in this needle-valve locating hole 9.Can the limited step 110 that one end of this fairlead 2 is carried out axial constraint be set at pilot hole 116 1 ends of this nozzle body, and be provided with the groove 8 that prevents this fairlead rotation in the position of this limited step.For the type that the jet hole diameter is 4 millimeters, these groove 8 width can be 1.6 millimeters.The end face of heat transfer jacket 5 carries out axial constraint to fairlead 2 other ends.Fairlead 2 can move axially in the pilot hole 116 of nozzle body.
The nozzle needle front portion is provided with horn shape continuous on the circumference 113, the strong point and supporting surface are not established in the nozzle needle front portion, and the neck of this needle-valve front end circular hole cylindrical and thermal conductivity good heat transfer cover makes the circular runner 114 of the anterior formation of nozzle extend to jet hole 111.Circular runner 114 should have certain length, generally be to be not less than jet hole 111 diameters, this spring 3 adopts and can make the structure that forms spiral flow channel 115 in the nozzle, can adopt bigger pitch, generally be pitch greater than jet hole 111 diameters, can guarantee that so enough spaces are passed through liquid plastic; This needle-valve locating hole 9 can be a screwed hole, inserts on this section needle-valve of this screwed hole and can be provided with the screw thread that is mated.
The front end of this needle-valve is provided with can regulate the axially movable structure of this needle-valve; For example, be to cooperate the normal screws cutter to use the structure of regulating, for example, can be provided with " one " font at the needle-valve front end face, the groove 7 of " ten " font or hexagon or other equilateral endoporus can cooperate the normal screws cutter to use and regulate, and needle-valve 6 is moved axially, but be used under the state of injection molded, arbitrarily control valve doorway 112 open sizes.
The front end of this spring 3 is connected on the heat transfer jacket 5, and tail end is connected on the fairlead 2, and fairlead 2 is provided with alignment pin 10, is fixed on the fairlead by the tail end of alignment pin with spring.The selection fixing, the butt position of the tail end of this spring and front end will make that spring balancing is stressed, for example these two location points spatially are that central point about spring is centrosymmetric and arranges, do not influence on the one hand the structure that forms above-mentioned spiral flow channel, guaranteed the uniformity of the axis of the axis of needle-valve 6 and nozzle body 1 on the other hand yet.
During injection moulding, act on injection pressure on the needle-valve 6 and then begin the spring compression when enough big, before needle-valve 6 is pushed to, jet hole 111 is opened, as shown in Figure 3.After injection mo(u)lding was finished, injection pressure descended, and the elastic force of spring is return needle-valve 6, and jet hole 111 is closed, as shown in Figure 4.
The nozzle needle front portion is provided with horn shape continuous on the circumference, and it is along axis ejection collision mold cavity that the guide effect of its convection cell can avoid penetrating material, improves liquidity.The strong point and supporting surface are not established in the nozzle needle front portion, and the neck of this needle-valve front end circular hole cylindrical and thermal conductivity good heat transfer cover makes the circular runner of the anterior formation of nozzle extend to jet hole 111.Can solve near the non-uniform temperature of jet hole and the problem of the material flow velocity difference on the jet hole circumference.Adopt the coarse pitch spring, the space between the pitch of spring wire footpath forms the spirality stream, can significantly reduce the viscous flow part of material, and its mixed effect helps the homogenizing material.The needle-valve rear end is connected with fairlead 2 by screw thread, when needle-valve produces rotation relatively to fairlead, can change the axial location of needle-valve with respect to jet hole.
The open adjustable size of needle-valve mouth of the present invention, jet hole thermal balance is good, can solve the current mark problem of moulding, improves the effect of the colour changing of reloading.The plastic solution plasticizing, density is even, reduces the goods internal stress, effectively improves the moulding performance.
The above-mentioned description to embodiment is can understand and use the present invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (7)
1, a kind of needle jet comprises nozzle body, nozzle head, needle-valve, heat transfer jacket, it is characterized in that: also comprise a fairlead, this fairlead is embedded in the pilot hole of nozzle body, which is provided with the needle-valve locating hole, be arranged with spring on this needle-valve, tail end inserts in this locating hole;
The circular hole of the neck of continuous horn shape and this needle-valve front end and heat transfer jacket is jointly in the anterior structure that forms circular runner of nozzle on the anterior circumference that is provided with of this needle-valve;
This needle-valve locating hole is a screwed hole, and the needle-valve that inserts this screwed hole is provided with the screw thread that is mated;
The front end of this needle-valve is provided with can regulate the axially movable structure of this needle-valve.
2, needle jet according to claim 1 is characterized in that: this can regulate the axially movable structure of this needle-valve is the type that can cooperate common hand tools to use.
3, needle jet according to claim 2 is characterized in that: the type is that the needle-valve front end face is provided with " one " font or " ten " font or equilateral groove.
4, needle jet according to claim 1 is characterized in that: the front end of this spring is fixed on the heat transfer jacket, and the tail end of this spring is fixed on the fairlead.
5, needle jet according to claim 1 is characterized in that: the tail end of this spring and front end spatially are that the central point about spring is centrosymmetric and arranges.
6, needle jet according to claim 1 is characterized in that: pilot hole one end at this nozzle body is provided with the limited step that an end of this fairlead is carried out axial constraint, and is provided with the groove that prevents this fairlead rotation in the position of this limited step.
7, needle jet according to claim 1 is characterized in that: this spring is to make the structure that forms spiral flow channel in the nozzle; The pitch of this spring is greater than the jet hole diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100714731A CN100534755C (en) | 2005-05-13 | 2005-05-13 | Needle valve type spray nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100714731A CN100534755C (en) | 2005-05-13 | 2005-05-13 | Needle valve type spray nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1861363A CN1861363A (en) | 2006-11-15 |
| CN100534755C true CN100534755C (en) | 2009-09-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100714731A Expired - Fee Related CN100534755C (en) | 2005-05-13 | 2005-05-13 | Needle valve type spray nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100534755C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069552B (en) * | 2010-11-22 | 2012-12-12 | 北京化工大学 | Spring nozzle for differential injection molding |
| CN102705539B (en) * | 2012-06-21 | 2013-06-26 | 镇江市博林光电科技有限公司 | Constant-pressure needle valve |
| CN104890239B (en) * | 2015-05-22 | 2017-03-01 | 浙江大学 | A kind of plastics mould-free forming device |
| CN108798531B (en) * | 2018-09-04 | 2024-02-20 | 中石化石油工程技术服务有限公司 | Variable drill bit nozzle |
| CN110587947A (en) * | 2019-09-24 | 2019-12-20 | 苏州斯塔克机械制造科技有限公司 | Color paste nozzle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3777990A (en) * | 1971-04-20 | 1973-12-11 | K Herzog | Valved nozzle for an injection molding machine |
| CN1043901A (en) * | 1989-01-03 | 1990-07-18 | 乔布斯特·乌尔里克·盖勒特 | The injection molding apparatus of the valve pin biasing mechanism of biasing is housed |
| CN2106706U (en) * | 1991-11-16 | 1992-06-10 | 常州第二电子仪器厂 | Valve-type sprueless nozzle of injection moulding machine |
| JP3566627B2 (en) * | 2000-06-19 | 2004-09-15 | フィーサ株式会社 | Valve nozzle |
-
2005
- 2005-05-13 CN CNB2005100714731A patent/CN100534755C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3777990A (en) * | 1971-04-20 | 1973-12-11 | K Herzog | Valved nozzle for an injection molding machine |
| CN1043901A (en) * | 1989-01-03 | 1990-07-18 | 乔布斯特·乌尔里克·盖勒特 | The injection molding apparatus of the valve pin biasing mechanism of biasing is housed |
| CN2106706U (en) * | 1991-11-16 | 1992-06-10 | 常州第二电子仪器厂 | Valve-type sprueless nozzle of injection moulding machine |
| JP3566627B2 (en) * | 2000-06-19 | 2004-09-15 | フィーサ株式会社 | Valve nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1861363A (en) | 2006-11-15 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090902 Termination date: 20140513 |