CN212288534U

CN212288534U - Hot nozzle assembly and hot runner system

Info

Publication number: CN212288534U
Application number: CN202021612960.0U
Authority: CN
Inventors: 李象烈
Original assignee: Yudo Suzhou Hot Runner Systems Co Ltd
Current assignee: Yudo Suzhou Hot Runner Systems Co Ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2021-01-05
Anticipated expiration: 2030-08-06

Abstract

The utility model discloses a hot mouth subassembly for mould, hot mouth subassembly includes the hot mouth that extends along the longitudinal axis, is located go into of hot mouth inboard glue mouth, play glue mouth and intercommunication go into glue mouth with go out the runner of glue mouth, the runner includes that runner and periphery are greater than go up the lower runner of runner, hot mouth subassembly is still including connecting in activity core in the runner down, activity core have towards go into the upper end of glue mouth, activity core can be adjusted ground upwards or move down on the extending direction of longitudinal axis, in order to adjust the upper end with clearance between the hot mouth. The utility model provides a hot mouth subassembly and hot runner system not only can conveniently adjust the flow of plastic, and simple structure, cost are lower.

Description

Hot nozzle assembly and hot runner system

Technical Field

The utility model relates to a hot runner mold field especially relates to a hot mouth subassembly and hot runner system.

Background

At present, the injection mold generally adopted in the injection molding industry is a hot runner injection mold, and compared with a common mold, the quality of a plastic product injected by a hot runner system is higher, and the hot runner system has the advantages of saving raw materials, improving the production efficiency, improving the automation degree and the like.

The hot nozzle component comprises a nozzle tip, a valve needle is movably arranged on the nozzle tip through piston driving, the valve needle moves in the direction of a longitudinal axis through the piston driving to open or close the pouring gate, the effective control on the plastic flow cannot be realized, and the structure is complex and the cost is high. In addition, the valve needle extends very long in the lengthwise direction, and after the long-term use of the slender valve needle, because of thermal expansion and plastic pressure, the slender valve needle is often deviated from the ideal position of the center, so when the valve needle is closed, the valve needle can impact the sprue bush or the die core, the sprue bush or the die core is damaged, and the service life is greatly reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hot mouth subassembly and hot runner system not only can conveniently adjust the flow of plastic, and simple structure, cost are lower.

In order to achieve one of the above objects of the present invention, one embodiment of the present invention provides a hot nozzle assembly for a mold, the hot nozzle assembly including a hot nozzle extending along a longitudinal axis, a glue inlet, a glue outlet and a flow passage communicating the glue inlet and the glue outlet, wherein,

the runner includes runner and the periphery is greater than runner down of runner, hot mouth subassembly still includes to be connected in runner down the activity core, the activity core has the face enter the upper end of jiao kou, the activity core can be adjusted upwards or move downwards in the extending direction of longitudinal axis, in order to adjust the upper end with the clearance between the hot mouth.

As an embodiment of the utility model is further improved, activity core threaded connection in the hot mouth, be equipped with two at least subchannels on the activity core, the subchannel with go up the runner and go out gluey mouthful homogeneous phase intercommunication.

As a further improvement of an embodiment of the present invention, the at least two sub-runners are uniformly distributed in the movable core with respect to the longitudinal axis.

As a further improvement of an embodiment of the present invention, the hot nozzle has an inclined portion connecting the upper flow path and the lower flow path, the branch flow path has an upper inlet facing the inclined portion and a lower outlet facing the glue outlet.

As a further improvement of an embodiment of the present invention, the upper end portion has an inclined surface parallel to the inclined portion, and the upper inlet is located on the inclined surface.

As a further improvement of an embodiment of the present invention, the movable core has a lower end opposite to the upper end, the branch channel has an upper branch channel and a lower branch channel that is angled and linked to the upper branch channel.

As a further improvement of an embodiment of the present invention, the lower runner is parallel to the extending direction of the lower runner.

As a further improvement of an embodiment of the present invention, the extending direction of the upper runner and the extending direction of the lower runner form an obtuse angle.

In order to achieve one of the above objects, an embodiment of the present invention further provides a hot runner system, comprising a mold and a hot nozzle assembly disposed on the mold, the hot nozzle assembly comprising a hot nozzle extending along a longitudinal axis, the hot nozzle having a glue inlet, a glue outlet, and a flow passage communicating the glue inlet and the glue outlet, wherein,

the runner includes runner and the periphery is greater than runner down of runner, hot mouth subassembly still includes connect in runner down the activity core, the activity core has the face runner up's upper end, the activity core can be adjusted upwards or move downwards in the extending direction of longitudinal axis, in order to adjust the upper end with the clearance between the hot mouth.

Compared with the prior art, the beneficial effects of the utility model reside in that: when the plastic flow needs to be adjusted, the movable core is adjusted to move upwards or downwards in the extending direction of the longitudinal axis, so that the gap between the upper end part and the hot nozzle is reduced or increased, and the plastic flow is adjusted. And the activity core has the upper end towards going into the jiao kou, that is to say, the activity core is kept away from and is gone into the jiao kou, and consequently the length of activity core on the extending direction of longitudinal axis is less, and the activity core need not set up actuating mechanism, therefore simple structure, cost are very low, and also very conveniently adjust the flow of plastic.

Drawings

FIG. 1 is a schematic longitudinal sectional view of a hot runner system according to an embodiment of the present invention;

FIG. 2 is a schematic longitudinal cross-sectional view of the hot tip assembly of the hot runner system of FIG. 1 with the movable core adjusted to a lower position for greater plastic flow;

FIG. 3 is an enlarged partial schematic view at A of FIG. 1;

FIG. 4 is a schematic longitudinal cross-sectional view of the hot nozzle assembly of FIG. 2, with the movable core adjusted upward and the plastic flow reduced relative to FIG. 2;

FIG. 5 is a schematic longitudinal cross-sectional view of the hot nozzle assembly of FIG. 4, with the movable core further adjusted upward and with a minimum plastic flow relative to FIG. 4.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art based on these embodiments are all included in the scope of the present invention.

In the various illustrations of the present application, certain dimensions of structures or portions may be exaggerated relative to other structures or portions for ease of illustration and, thus, are provided to illustrate only the basic structure of the subject matter of the present application.

Terms such as "upper," "above," "lower," "below," and the like, used herein to denote relative spatial positions, are used for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 5, the embodiment of the present invention provides a hot runner system, which includes a mold, a hot nozzle assembly 10 disposed on the mold, a temperature control box and a hot runner formed in the hot nozzle assembly 10 at least, and through means of heating and temperature control for injecting glue material, plastic in a molten state is poured into a cavity of the mold after passing through the hot nozzle assembly 10 in sequence, so as to avoid the formation of solidified material of the pouring system.

The mold includes an upper cover plate 14, a diverter plate 16 and a cavity plate 17, the hot tip assembly 10 is partially disposed on the diverter plate 16, and the hot tip assembly 10 is partially disposed on the cavity plate 17. The hot nozzle 20 system includes a plurality of hot nozzle assemblies 10 provided to the mold, and in the preferred embodiment, the hot runner system includes two hot nozzle assemblies 10 provided to the mold. Of course, more than two hot nozzle assemblies 10 may be provided according to specific requirements, and the flow distribution plate 16 is provided with flow distribution plate flow passages 18 communicated with the two hot nozzle assemblies 10.

Specifically, the hot nozzle assembly 10 includes a hot nozzle 20 extending along the longitudinal axis X, a glue inlet 22 located inside the hot nozzle 20, a glue outlet 24, and a flow channel communicating the glue inlet 22 and the glue outlet 24, in the preferred embodiment, the glue inlet 22 and the glue outlet 24 are both disposed on the hot nozzle 20, and the glue inlet 22 is communicated with the flow dividing plate flow channel 18 for flowing molten plastic. The glue outlet 24 is adjacent the underside of the cavity plate 17 to allow the plastic to be poured into the cavity of the mold.

The flow channel includes an upper flow channel 26 and a lower flow channel 28 having a larger circumference than the upper flow channel 26, the hot nozzle assembly 10 further includes a movable core 30 connected in the lower flow channel 28, the movable core 30 has an upper end portion 32 facing the glue inlet 22, and the movable core 30 is adjustably movable upward or downward in the extending direction of the longitudinal axis X to adjust a gap between the upper end portion 32 and the hot nozzle 20.

When the plastic flow rate needs to be adjusted, the movable core 30 is moved upward or downward in the extending direction of the longitudinal axis X by adjusting the movable core 30, so that the gap between the upper end portion 32 and the hot nozzle 20 is reduced or increased to adjust the plastic flow rate. The movable core 30 has an upper end 32 facing the glue inlet 22, that is, the movable core 30 is far away from the glue inlet 22, so that the length of the movable core 30 in the extending direction of the longitudinal axis X is small, and the movable core 30 does not need to be provided with a driving mechanism, so that the structure is simple, the cost is very low, and the flow of the plastic is very convenient to adjust.

The movable core 30 is connected in the hot nozzle 20 in a threaded manner, at least two sub-runners 34 are arranged on the movable core 30, and the sub-runners 34 are communicated with the upper runner 26 and the glue outlet 24. Specifically, an internal thread portion is provided on a part of the inner wall of the lower flow passage 28, and an external thread portion adapted to the internal thread portion is provided on the outer periphery of the movable core 30. When the movable core 30 is adjusted, the movable core 30 is completely away from the upper flow passage 26 or is partially located in the upper flow passage 26. When the movable core 30 is rotated to move in a direction gradually away from the glue inlet 22, the flow rate of the plastic gradually increases as the gap between the upper end portion 32 and the hot nozzle 20 gradually increases, until the flow rate of the plastic is maximum, the movable core 30 completely moves away from the upper flow channel 26; when the movable core 30 is rotated to move toward the direction gradually approaching the glue inlet 22, the flow rate of the plastic gradually decreases as the gap between the upper end portion 32 and the hot nozzle 20 gradually decreases, so that when the flow rate of the plastic is minimum or completely zero, a small portion of the movable core 30 is located in the upper flow passage 26. And when the flow rate of the plastic is maximized, the movable core 30 still does not protrude out of the hot nozzle 20. The length of the movable core 30 is very small and it is not necessary to additionally provide a driving mechanism for driving the movable core 30.

In addition, in the preferred embodiment, the movable core 30 is always rigidly connected to the hot nozzle 20, which prevents deformation and deflection of the movable core 30, resulting in a more stable and reliable hot nozzle assembly 10 with a longer service life.

At least two sub-runners 34 are evenly distributed about the longitudinal axis X on the movable core 30. Hot nozzle 20 has a sloped portion 36 connecting upper flow path 26 and lower flow path 28, and sub-flow path 34 has an upper inlet 38 facing sloped portion 36 and a lower outlet 40 facing glue outlet 24. When the movable core 30 is adjusted upward or downward, the gap between the upper end portion 32 and the inclined portion 36 becomes smaller or larger, thereby adjusting the flow rate of the plastic. The inclined portion 36 is a tapered surface, and an included angle formed between the inclined portion 36 and the inner wall of the upper flow path 26 is an obtuse angle. Preferably, the angle formed by the inclined portion 36 and the inner wall of the upper flow path 26 is 145 degrees.

The movable core 30 has a lower end 42 opposite the upper end 32, the lower end 42 facing the glue outlet 24, and the lower outlet 40 being provided on the lower end 42. Further, the lower end portion 42 is provided with an adjusting portion 44 that is engaged with or disengaged from an externally-connected adjusting tool (not shown). When it is desired to adjust the movable core 30 upward or downward along the extension direction of the longitudinal axis X, an externally-connected adjusting tool is engaged with the adjusting portion 44, thereby rotating the movable core 30 upward or downward. When the adjustment is completed, the adjustment tool is disengaged from the adjustment portion 44 and removed.

Preferably, the adjustment portion 44 is provided as an inner hexagonal. Of course, the adjusting portion 44 can be configured as an outer hexagon or other structures, so long as it can be adapted to an adjusting tool to rotate the movable core 30. In the preferred embodiment, the adjusting portion 44 is a hexagon socket, so that the movable core 30 can be adjusted by using a common hexagon wrench, and the adjusting portion 44 is disposed on the lower end portion 42, so that the adjusting portion 44 is closer to the glue outlet 24, and the movable core 30 can be adjusted more conveniently.

The lower end 42 has a spherical surface on which the lower outlet 40 is located, so that the outlet area of the lower outlet 40 can be increased.

Further, the upper end portion 32 has a slope 46 parallel to the inclined portion 36, and the upper inlet 38 is located at the slope 46. Preferably, the upper inlet 38 is disposed closer to the inner wall of the lower flow channel 28 so that no plastic builds up between the inclined surface 46 of the movable core 30 and the hot nozzle 20. When the movable core 30 is adjusted to the point where the inclined portion 36 engages the inclined surface 46, the flow of plastic is zero, i.e., the glue is completely shut off. The inclined portion 36 is in surface contact with the inclined surface 46, so that the plastic closing effect is better.

Sub-runners 34 have upper sub-runners 48 and lower sub-runners 50 angled and communicating with upper sub-runners 48. Preferably, the upper sub-runners 48 are angled at an angle of 130 to 140 degrees from the lower sub-runners 50. Specifically, in the present embodiment, the included angle between the upper runner 48 and the lower runner 50 is 135 degrees.

In addition, the lower runners 50 are parallel to the direction of extension of the lower runners 28. That is to say, the lower runners 50 are parallel to the extension of the longitudinal axis X. The extension direction of the upper runners 48 is at an obtuse angle to the extension direction of the lower runners 50. The upper run-off channels 48 extend obliquely upwards from their connection with the lower run-off channels 50 in a direction gradually away from the longitudinal axis X.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A hot nozzle assembly for a mold, the hot nozzle assembly comprising a hot nozzle extending along a longitudinal axis, a glue inlet, a glue outlet and a flow passage communicating the glue inlet and the glue outlet, the hot nozzle assembly being positioned inside the hot nozzle,

2. The hot nozzle assembly of claim 1, wherein said movable core is threaded into said hot nozzle, said movable core having at least two sub-runners, said sub-runners communicating with said upper runner and said glue outlet.

3. The hot nozzle assembly of claim 2, wherein said at least two sub-runners are evenly distributed about said longitudinal axis on said movable core.

4. A hot nozzle assembly as claimed in claim 2, wherein said hot nozzle has a beveled portion connecting said upper flow passage and said lower flow passage, said sub-flow passage having an upper inlet facing said beveled portion and a lower outlet facing said glue outlet.

5. The hot nozzle assembly of claim 4, wherein the upper end portion has a beveled surface parallel to the beveled portion, the upper inlet being located on the beveled surface.

6. The hot nozzle assembly of claim 2, wherein said movable core has a lower end opposite said upper end, said sub-runners having an upper sub-runner and a lower sub-runner angled and communicating with said upper runner.

7. The hot nozzle assembly of claim 6, wherein the lower runner is parallel to a direction of extension of the lower runner.

8. The hot nozzle assembly of claim 7, wherein the extension direction of the upper runner is at an obtuse angle to the extension direction of the lower runner.

9. A hot runner system comprising a mold and a hot nozzle assembly disposed on the mold, the hot nozzle assembly comprising a hot nozzle extending along a longitudinal axis, the hot nozzle having a glue inlet, a glue outlet, and a flow passage communicating the glue inlet and the glue outlet,

10. The hot-runner system according to claim 9, wherein the movable core is threaded into the hot nozzle, and the movable core is provided with at least two sub-runners, and the sub-runners are communicated with the upper runner and the glue outlet.