CN216860415U - Nozzle melting-increasing valve core - Google Patents

Abstract

The utility model discloses a nozzle melting-increasing valve core, which comprises at least one melting-increasing valve core, wherein the melting-increasing valve core is of a cylindrical structure, at least one group of mixing flow channels are formed in the periphery of the melting-increasing valve core along the axial direction, and the mixing flow channels are formed by connecting a plurality of grooves with different depths. The nozzle melting-increasing valve core adopts a cylindrical structure, and a plurality of grooves with different depths are formed in the periphery of the nozzle melting-increasing valve core, so that plastics can be better melted and mixed when being overturned, and the injection molding quality is greatly improved; and the structure design is simple and novel, the defects of poor plasticization, poor color mixing, unstable sol time, difficult cleaning after color changing, black spots and black lines and the like of the existing screw are effectively overcome, the production efficiency is improved, and the production cost of enterprises is reduced.

Description

Nozzle melting-increasing valve core

Technical Field

The utility model belongs to the technical field of injection molding, relates to a mixing injection nozzle, and particularly relates to an injection nozzle melten-increasing valve core.

Background

At present, the types of plastics in the injection molding industry are continuously updated, the performance is continuously improved, the market competition is very fierce, the profits of processing enterprises are lower and lower, and the injection molding industry is fierce. Three of the most critical factors in the injection molding industry are well known: raw materials, machines, moulds. The raw materials are the most critical factors in the injection molding industry, the types of the raw materials are continuously increased at present, more and more modified plastics are produced, the additives, the toner and the color master are more and more complex, the original standard screw design problem is gradually revealed, and the problems of poor plasticization, poor color mixing, unstable sol time, difficult cleaning after color changing, black spots and black lines and the like are more and more produced. The cost for replacing the screw material pipe is too high, and a lot of economic burden can be added to enterprises.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel injection nozzle melt-enhancing valve core which is arranged at the front end of a material pipe of an injection molding machine and is used for improving and compensating the condition of insufficient mixing or poor mixing effect of a screw.

In order to realize the purpose, the utility model adopts the following technical scheme:

the utility model provides a nozzle melting-increasing valve core, which comprises at least one melting-increasing valve core, wherein the melting-increasing valve core is of a cylindrical structure, at least one group of mixing flow channels are formed in the periphery of the melting-increasing valve core along the axial direction, and the mixing flow channels are formed by connecting a plurality of grooves with different depths.

Furthermore, on the jet nozzle melting-increasing valve core, a plurality of mixing flow channels are arranged at intervals along the circumference of the melting-increasing valve core, and a feed inlet and a discharge outlet are respectively arranged at two ends of the mixing flow channels.

Further, on the nozzle melten-up valve core, the mixing flow channel comprises at least one first groove and at least one second groove connected with the first groove, and the depth of the first groove is greater than or less than that of the second groove.

Further preferably, on the nozzle melten-up spool, the first groove and/or the first groove are linear, curved or dog-leg shaped.

Further preferably, on the nozzle melten-up spool, the first groove is arranged on at least one side of the second groove and is communicated with the side wall of the second groove.

Further preferably, on the nozzle melten-up valve core, the mixing flow channel further comprises a third groove, and the third groove is arranged between the first groove and/or the second groove.

More preferably, in the nozzle melten-up spool, the third groove is provided on at least one side of the first groove and/or the second groove and communicates with a side wall of the first groove and/or the second groove.

Furthermore, on the nozzle melt-adding valve core, the number of the mixing flow channels is 1-20, and the number of the grooves is 2-100.

Furthermore, on the nozzle melting-increasing valve core, two ends of the melting-increasing valve core are in a conical structure, and the conical angle is 5-120 degrees.

Furthermore, on the nozzle melting-increasing valve core, the length of the melting-increasing valve core is 10-500mm, and the outer diameter is 10-100 mm.

Furthermore, on the injection nozzle melting-increasing valve core, a protective coating is coated on the surface of the melting-increasing valve core, and the protective coating adopts chromium nitride, titanium nitride vacuum coating, electroplating and other modes.

By adopting the technical scheme, compared with the prior art, the utility model has the following technical effects:

(1) the melting valve core is of a cylindrical structure, and a plurality of grooves with different depths are formed in the periphery of the melting valve core, so that plastics can be better melted and mixed, and the injection molding quality is greatly improved;

(2) the melting-increasing valve core is assembled in an assembly cavity between the sub-nozzle and the flange connector, so that the assembly and disassembly are convenient and quick, and the cleaning is very easy;

(3) the protective coating is added outside the melting-increasing valve core, so that the wear resistance, corrosion resistance and lubricating property of the surface of the melting-increasing valve core are improved, and black spots and black lines are not easy to generate due to dead corners;

(4) the nozzle melt-enhancing valve core is simple and novel in structural design, effectively overcomes the defects that the existing screw is poor in plasticization, poor in color mixing, unstable in sol time, not easy to clean after color changing, black spots and black lines and the like, is high in production efficiency, and reduces the production cost of enterprises.

Drawings

FIG. 1 is a schematic view of the overall structure of a nozzle melt-enhancing valve core according to the present invention;

FIG. 2 is a schematic cross-sectional view of a fuse-adding valve core in a nozzle fuse-adding valve core according to the present invention;

FIG. 3 is a schematic longitudinal sectional view of a fuse-adding valve core in the nozzle fuse-adding valve core according to the present invention;

FIG. 4 is a schematic cross-sectional view of the rear end of a melt-up spool in a melt-up spool of an injection nozzle according to the present invention;

FIG. 5 is a schematic view of a surface unfolding structure of a melt-up valve core in the jet nozzle melt-up valve core according to the present invention;

wherein the reference symbols are:

10-sub nozzle; 20-a flange connection; 30-a melting-increasing valve core, 31-a mixing flow channel, 32-a first groove, 33-a second groove and 34-a third groove.

Detailed Description

The present invention will be described in detail and specifically with reference to the following examples to facilitate better understanding of the present invention, but the following examples do not limit the scope of the present invention.

In some embodiments, as shown in fig. 1, a nozzle melt-up spool installed at the front end of a feed pipe of an injection molding machine for improving and compensating insufficient mixing of a screw or poor mixing effect is provided, the nozzle melt-up spool mainly comprises a sub-nozzle 10, a flange connector 20 and at least one melt-up spool 30, the melt-up spool 30 is arranged in an assembly cavity formed by the flange connector 20 and the sub-nozzle 10, and as required, the melt-up spools 30 can be multiple, the multiple melt-up spools 30 are sequentially connected in an abutting manner, so that the whole assembly and disassembly are convenient and rapid, and the cleaning is very easy.

In some embodiments, as shown in fig. 1, fig. 2 and fig. 3, in order to improve and compensate for the situation of insufficient mixing or poor mixing effect of the screw, the nozzle melt-adding spool adopts a melt-adding spool 30 with a special structural design, the melt-adding spool 30 is a cylindrical structure, at least one set of mixing flow channel 31 is axially arranged on the periphery of the cylindrical structure, and the mixing flow channel 31 is formed by connecting a plurality of grooves with different depths in series, so that the mixing flow channel 31 forms a mixing channel with a variable cross section. Through set up a plurality of depth grooves that differ at 30 weeks physically of the increase melting case, make plastics turn over to melt the mixture better, effectively solved current screw rod plastify bad, colour mixture bad, the sol time unstable, be difficult for wasing after the color change, defect such as black dot black line, improved the quality of moulding plastics greatly, and its production efficiency is high, has reduced enterprise manufacturing cost.

In some embodiments, as shown in fig. 2, fig. 3, fig. 4 and fig. 5, a plurality of mixing runners 31 are arranged at intervals along the circumference of the melten-increasing valve core 30, and both ends of each mixing runner 31 are respectively provided with a feeding port and a discharging port to communicate the nozzle port of the front sub-nozzle 10 and the feeding port of the rear flange connector 20, so as to form at least one complete injection passage outside the melten-increasing valve core 30. In one preferred embodiment, the mixing channels 31 are equally spaced around the circumference of the melt-adding valve core 30.

In some embodiments, as shown in fig. 2, 3, 4 and 5, the mixing channel 31 is formed by at least one first groove 32 and at least one second groove 33 connected to the first groove 32, and the depth of the first groove 32 is greater than or less than the depth of the second groove 33. It is clear from this that different groove depths will inevitably form mixing nodes at the junction of the first groove 32 and the second groove 33, which transition from high to low or from low to high. In order to greatly improve the mixing effect to the maximum extent, the plurality of first grooves 32 and the plurality of second grooves 33 are alternately connected to form the maximum number of mixing nodes.

In some embodiments, each of the first grooves 32 and/or the first grooves 32 on the fuse-adding valve core 30 may be linear, curved or dog-leg according to actual production requirements and mixing requirements.

As one preferred embodiment, as shown in fig. 2, 3 and 5, the first groove 32 and/or the first groove 32 is a straight groove which is arranged along the length direction of the fusible spool 30.

As one preferred embodiment, as shown in fig. 2, 3 and 5, the first groove 32 is disposed on at least one side of the second groove 33 and communicates with the sidewall of the second groove 33, so that the cross-sectional area of a single mixing node is increased as much as possible, thereby improving the single mixing effect. Specifically, during the operation of the fuse valve core 30, the plastic in the first groove 32 is extruded into the second groove 33 on one side from the side wall through the mixing node, and one mixing is completed. The plastic is mixed for many times in a mixing runner 31 through mixing nodes formed by a plurality of grooves with different depths, so that the plastic can be better melted and mixed.

In addition, as another embodiment, the first groove 32 is provided at the front end or the rear end of the second groove 33, in this case, the cross-sectional area of a mixing node formed at the connection between the first groove 32 and the second groove 33 is the cross-sectional area of the groove, and the single mixing effect of the plastic passing through the mixing node is poor. In this case, the number of the first grooves 32 and the second grooves 33 is increased, and the lengths of the first grooves 32 and the second grooves 33 are shortened, so that a large number of kneading nodes are constructed in the kneading flow path 31 having a constant length, thereby improving the kneading efficiency of the plastic.

In other embodiments, as shown in fig. 2, fig. 3 and fig. 5, the mixing channel 31 further includes a third groove 34, which is formed by connecting the first groove 32, the second groove 33 and the third groove 34 according to a certain rule, and as is clear from the figure, the third groove 34 is disposed between the first groove 32 and/or the second groove 33, the ends of the first groove 32 and the second groove 33 are provided with material inlets and material outlets, and the end of the third groove 34 is not provided with material inlets and material outlets.

As an example, as shown in fig. 2, 3, 4 and 5, the third groove 34 is disposed on at least one side of the first groove 32 and/or the second groove 33, and is communicated with a sidewall of the first groove 32 and/or the second groove 33, that is, the third groove 34 is communicated with the first groove 32 and/or the second groove 33 through the sidewall.

As one preferred embodiment, as shown in fig. 2, 3, 4 and 5, 4 sets of mixing channels 31 are provided at intervals on the circumference of the fuse-adding valve core 30, the left and right ends of the mixing channels 31 respectively extend to the front and rear end faces of the fuse-adding valve core 30 to form corresponding feed inlets and discharge outlets, and as shown in the expanded schematic view of fig. 5, the mixing channels 31 are centrally symmetrical as a whole.

Specifically, each group of the mixing flow channel 31 is composed of two first grooves 32, two second grooves 33 and a third groove 34, the depth of the first groove 32 is greater than that of the second groove 33, and the depth of the first groove 32 is equal to that of the third groove 34; the first grooves 32 are arranged at two ends of the mixing flow channel 31 in a staggered mode, feed and discharge ports are formed in the end portions of the first grooves, two ends of the third groove 34 are closed and are arranged between the two first grooves 32 at intervals along the axial direction, side walls of two ends of the third groove 34 are communicated with side walls of the first grooves 32 through the second grooves 33 respectively, and therefore mixing nodes are formed at the connecting positions of two side walls of the second grooves 33. In the using process, plastics are extruded and discharged from the first groove 32 at the other end into an inlet nozzle through the second groove 33, the third groove 34 and the second groove 33 with different depths from the first groove 32 at one end in sequence, and multiple rolling mixing in one mixing flow channel 31 is realized.

In some embodiments, as shown in fig. 4 and 5, the number of the mixing channels 31 is 1 to 20, and the number of the grooves is 2 to 100. Preferably, the number of the mixing flow channels 31 is 2-18, and the number of the grooves is 5-80. More preferably, the number of the mixing runners 31 is 4-15, and the number of the grooves is 10-70. More preferably, the number of the mixing runners 31 is 5-10, and the number of the grooves is 20-60.

In some embodiments, as shown in fig. 3, two ends of the meltdown valve core 30 are in a conical structure, an outer peripheral body at the front end of the meltdown valve core 30 is in fit connection with an inner hole of the sub-injector 10, and an outer peripheral body at the rear end is in fit connection with an inner hole of the flange connector 20. The angle of taper a at both ends of the fuse core 30 is 5-120, preferably 30-90, more preferably 45-75, and even more preferably 60.

In some embodiments, the fuse-adding spool 30 has a length of 10-500mm and an outer diameter of 10-100 mm. Preferably, the length of the fuse-adding valve core 30 is 30-450mm, and the outer diameter is 12-80 mm. More preferably, the length of the fuse-adding valve core 30 is 50-360mm, and the outer diameter is 15-70 mm. More preferably, the length of the fuse-adding valve core 30 is 100-280mm, and the outer diameter is 18-50 mm. Still more preferably, the length of the fuse-adding valve core 30 is 140-160mm, and the outer diameter is 23-35 mm.

In some embodiments, the first grooves 32 and the second grooves 33 have a depth of 1 to 10mm, the second grooves 33 have a depth of 0.1 to 2.5mm, and the third grooves 34 have a depth of 1 to 10 mm. Preferably, the depth of the first grooves 32 and the depth of the second grooves 33 are 1.5 to 8mm, the depth of the second grooves 33 are 0.2 to 2mm, and the depth of the third grooves 34 are 1.5 to 8 mm. Preferably, the depth of the first grooves 32 and the depth of the second grooves 33 are 2-8mm, the depth of the second grooves 33 are 0.3-1.2mm, and the depth of the third grooves 34 are 2-8 mm. More preferably, the depth of the first grooves 32 and the depth of the second grooves 33 are 3 to 6mm, the depth of the second grooves 33 are 0.4 to 0.6mm, and the depth of the third grooves 34 are 3 to 6 mm.

In addition, the surface of the melting-up valve core 30 is coated with a protective coating, and the protective coating adopts chromium nitride, titanium nitride vacuum coating, electroplating and other modes, so that the wear resistance, corrosion resistance and lubricating performance of the surface of the melting-up valve core are improved, and black spots and black stripes are not easy to generate due to dead corners.

As shown in figure 1, the flange connector 20 of the nozzle melting-increasing valve core of the utility model is arranged on a material pipe of an injection molding machine and is tightened, and then a proper heating ring and a temperature sensing line are arranged to realize heating production.

During the working process, before injection molding is started, the injection platform of the injection molding machine moves forward, the R spherical surface at the front end of the sub injection nozzle 10 is in contact with and pressed against the R spherical surface at the glue inlet of the mold, melted plastics are pushed by a screw to flow into the mixing channel 31 of the melting-increasing valve core, the melted plastics are pushed to the second channel 33, the third channel 34 and the like from the first channels 32 with different depths under the extrusion of the injection pressure of the machine respectively, after being mixed by a plurality of mixing nodes, the melting-increasing valve core 30 combines the plastics of the mixing channels 31 with a plurality of branches on the melting-increasing valve core into a path and gathers the path in the inner hole cavity of the sub injection nozzle 10, and then the paths are injected into the mold from the injection nozzle opening of the sub injection nozzle 10. In the process, the plastic which is not melted or completely plasticized can be extruded and mixed for a plurality of times by narrow gaps again, so that the real melting and mixing effect is achieved.

In addition, a heating ring and a temperature sensing line are arranged outside the injection nozzle melting-increasing valve core, the temperature of the plastic entering the mold can be adjusted and corrected in a computer, and the plastic is not easy to deteriorate and decompose under the condition of better plasticizing and fusing.

The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.

Claims (9)

1. The nozzle melt-enhancing valve core comprises at least one melt-enhancing valve core and is characterized in that the melt-enhancing valve core is of a cylindrical structure, at least one group of mixing flow channels are axially arranged on the periphery of the melt-enhancing valve core, and the mixing flow channels are formed by connecting a plurality of grooves with different depths; the mixing runners are arranged at intervals along the circumference of the melting-increasing valve core, and a feeding hole and a discharging hole are respectively formed in two ends of the mixing runners.

2. The nozzle meltenf iotaning cartridge of claim 1, wherein the mixing channel comprises at least one first groove and at least one second groove connected to the first groove, and the depth of the first groove is greater than or less than the depth of the second groove.

3. The nozzle meltup spool according to claim 2, wherein the first groove and/or the first groove is linear, curvilinear, or dog-leg shaped.

4. The nozzle meltup spool according to claim 2, wherein the first groove is provided on at least one side of the second groove and communicates with a side wall of the second groove.

5. The nozzle meltup spool according to claim 2, characterized in that the mixing channel further comprises a third groove disposed between the first groove and/or the second groove.

6. The nozzle meltup spool according to claim 5, wherein the third groove is provided on at least one side of the first groove and/or the second groove and communicates with a side wall of the first groove and/or the second groove.

7. The nozzle meltup spool according to claim 1, characterized in that the number of the mixing channels is 1 to 20 and the number of the grooves is 2 to 100.

8. The nozzle fuse-adding spool according to claim 1, wherein both ends of the fuse-adding spool are tapered structures with a taper angle of 5-120 °.

9. The nozzle fuse-adding spool according to claim 1, characterized in that the fuse-adding spool has a length of 10-500mm and an outer diameter of 10-100 mm.

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