CN221136740U - Hot nozzle and injection molding system - Google Patents
Hot nozzle and injection molding system Download PDFInfo
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- CN221136740U CN221136740U CN202323079655.6U CN202323079655U CN221136740U CN 221136740 U CN221136740 U CN 221136740U CN 202323079655 U CN202323079655 U CN 202323079655U CN 221136740 U CN221136740 U CN 221136740U
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- hot nozzle
- hot
- nozzle
- sealing needle
- injection molding
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 42
- 238000007789 sealing Methods 0.000 claims abstract description 63
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 239000003292 glue Substances 0.000 claims description 61
- 239000004033 plastic Substances 0.000 claims description 47
- 229920003023 plastic Polymers 0.000 claims description 47
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 230000007423 decrease Effects 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 7
- 238000001125 extrusion Methods 0.000 description 9
- 238000000465 moulding Methods 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model belongs to the technical field of injection molds, and provides a hot nozzle and an injection molding system. After injection molding is completed, the injection molding machine is stopped, and the sealing needle can be pushed to return to the first working position from the second working position under the action of the elastic force of the elastic piece. Compared with the prior art that the sealing part is closed by the driving cylinder body, the hot nozzle provided by the utility model can save the space for arranging the driving cylinder body and can also save the production cost.
Description
Technical Field
The utility model relates to the technical field of injection molds, in particular to a hot nozzle and an injection molding system.
Background
The hot runner is widely applied to the production of injection molds, and the pin-point structure is widely applied to the injection molding of plastic mold products due to the characteristics of self-separation of the gate from the products, small gate mark, small stress near the gate position and the like.
The current needle point type is mainly that the valve needle is driven by the driving cylinder body to close the pouring gate, but the template needs to be heightened and thickened during manufacturing, and a clearance groove for installing the driving cylinder body is also required to be arranged on the template, so that the material consumption and the production and processing cost of the template need to be additionally increased. In addition, since the split plate is provided with the sealing guide sleeve matched with the valve needle, the plate thickness of the split plate is increased for the same type of hot runner main body. It is necessary to further increase the production cost of the form.
Therefore, the above-described problems are to be solved.
Disclosure of utility model
The utility model aims to provide a hot nozzle and an injection molding system, which not only can realize that a sealing needle can seal and open a glue outlet part, but also can reduce the space occupation area of a die core.
To achieve the purpose, the utility model adopts the following technical scheme:
a hot nozzle comprising a hot runner body, the hot nozzle further comprising:
The hot nozzle cover comprises a mounting part and a glue outlet part, wherein the mounting part is connected with the hot runner main body, the mounting part is provided with an inner cavity connected with the hot runner main body, and the glue outlet part is communicated with the inner cavity so that the glue outlet part receives plastic in a molten state and is injected into a molding cavity of a mold core through the glue outlet part;
The sealing needle is arranged in the hot nozzle cover in a sliding manner and is provided with a first working position and a second working position for plugging and opening the glue outlet part; and
An elastic member connected to the seal needle and configured to retain the seal needle in the first operating position; when the plastic flows to the glue outlet part, the injection pressure of the plastic can overcome the elasticity of the elastic piece, so that the glue sealing needle is positioned at the second working position.
Preferably, the hot nozzle further comprises:
The hot nozzle core is arranged in the hot nozzle cover, and a gap is arranged between the outer peripheral wall of the hot nozzle core and the inner peripheral wall of the hot nozzle cover; the elastic piece is arranged between the hot nozzle core and the sealing needle.
Preferably, a track groove is formed in the bottom of the hot nozzle core, the sealing needle is slidably arranged in the track groove, and the elastic piece can be arranged between the groove bottom of the track groove and the sealing needle in an extrusion mode.
Preferably, the outer side wall of the sealing needle is at least partially attached to the inner side wall of the track groove.
Preferably, the elastic member is a disc spring.
Preferably, a connecting part is arranged on the peripheral wall of the hot nozzle core, and the connecting part is connected with the inner wall of the hot nozzle cover; or (b)
A plurality of connecting parts are uniformly arranged on the peripheral wall of the hot nozzle core, and the connecting parts are connected with the inner wall of the hot nozzle cover.
Preferably, the diameter of the outer wall of the hot nozzle core is set to be variable along the circulation direction of the plastic.
Preferably, a flow port is arranged at the bottom of the glue outlet part, and the diameter of the glue outlet part gradually decreases along the circulation direction of the plastic.
Preferably, the diameter of the sealing needle is gradually reduced along the flowing direction of the plastic, and the maximum position of the diameter of the sealing needle is not smaller than the diameter of the flow port.
The injection molding system comprises an injection molding machine, a panel, a hot runner plate, a mold core and the hot nozzle, wherein the injection nozzle connected with the injection molding machine is arranged on the panel, an injection molding channel is arranged in the hot runner plate, and two ends of the injection molding channel are respectively connected with the injection nozzle and the hot runner main body.
The utility model has the beneficial effects that:
According to the hot nozzle and the injection molding system, the glue outlet part is arranged at the end part of the hot nozzle cover, when molten plastic flows to the glue outlet part, the plastic can generate acting force for enabling the glue sealing needle to be far away from the glue outlet part under the injection molding pressure provided by the injection molding machine, and the glue sealing needle can open the glue outlet part under the pushing action of the acting force, namely, under the acting force, the glue sealing needle can be transferred from the first working position to the second working position. After injection molding is completed, the injection molding machine is stopped, and the sealing needle can be pushed to return to the first working position from the second working position under the action of the elastic force of the elastic piece. Compared with the prior art, the sealing part is closed by driving the sealing part through the driving cylinder body, and the hot nozzle provided in the embodiment not only can save the space for arranging the driving cylinder body, but also can save the production cost.
Drawings
FIG. 1 is a schematic diagram of an injection molding system according to an embodiment of the present utility model;
Fig. 2 is a schematic structural view of a hot nozzle cover, a sealing needle and a hot nozzle core according to an embodiment of the present utility model.
In the figure:
100. A panel; 110. an injection nozzle; 200. a hot runner plate; 210. an injection molding channel; 300. a mold core; 400. a hot nozzle;
1. A hot runner body; 2. a hot nozzle cover; 21. a glue outlet part; 22. a mounting part; 3. a sealing needle; 4. a hot nozzle core; 41. a track groove; 42. a mounting groove; 43. a guide rod; 5. an elastic member.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", etc., azimuth or positional relationship are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description and simplification of operations, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
Referring to fig. 1 to 2, an injection molding system is provided in the present embodiment, and the injection molding system includes an injection molding machine (not shown), a panel 100, a hot runner plate 200, a mold insert 300 and a hot nozzle 400, wherein the panel 100 is provided with an injection nozzle 110 connected with the injection molding machine, an injection molding channel 210 is provided in the hot runner plate 200, and two ends of the injection molding channel 210 are respectively connected with the injection nozzle 110 and the hot runner main body 1. It will be appreciated that the injection molding machine is capable of providing injection molding pressure to the plastic and injecting the plastic in a molten state into the nozzle 110 by the injection molding machine, the plastic being circulated through the injection pipe to the hot nozzle 400, and the plastic being injected from the gate of the mold 300 into the molding cavity of the mold 300 under the guidance of the hot nozzle 400.
In some other possible embodiments, the injection molding channel 210 includes a plurality of branches, and the plurality of branches are respectively provided with the hot nozzle 400 correspondingly, so that plastics can be injected into different molding cavities, and thus the production efficiency of products can be improved.
Based on the above, the present embodiment further provides a hot nozzle 400, where the hot nozzle 400 includes a hot runner main body 1, a hot nozzle cover 2, an elastic member 5, and a sealing pin 3, the hot runner main body 1 is disposed on the mold core 300, and the hot runner main body 1 is disposed opposite to the gate; the hot nozzle cover 2 includes a mounting portion 22 and a glue outlet portion 21, the mounting portion 22 is connected with the hot runner main body 1, and the mounting portion 22 has an inner cavity connected with the hot runner main body 1, the glue outlet portion 21 is communicated with the inner cavity so that the glue outlet portion 21 receives molten plastic and is discharged through the glue outlet portion 21, the glue sealing needle 3 is slidably arranged inside the hot nozzle cover 2, and the glue sealing needle 3 has a first working position and a second working position for blocking and opening the glue outlet portion 21, the elastic piece 5 is connected with the glue sealing needle 3, and the elastic piece 5 is configured to keep the glue sealing needle 3 at the first working position; when the plastic flows to the glue outlet part 21, the injection pressure of the plastic can overcome the elastic force of the elastic piece 5, so that the glue sealing needle 3 is in the second working position.
It will be appreciated that, when the molten plastic flows to the glue outlet 21, the plastic can generate a force to separate the sealing needle 3 from the glue outlet 21 under the injection pressure provided by the injection molding machine, and the sealing needle 3 can open the glue outlet under the pushing of the force, that is, the sealing needle 3 can be transferred from the first working position to the second working position under the force. After injection molding is completed, the injection molding machine is stopped, and the sealing needle 3 can be pushed to return to the first working position from the second working position under the action of the elastic force of the elastic piece 5. Compared with the prior art in which the sealing needle 3 is driven to close the glue outlet 21 by the driving cylinder, the thermal nozzle 400 provided in the embodiment not only can save the space for setting the driving cylinder, but also can save the production cost.
In particular, a flow port is arranged at the bottom of the glue outlet part 21, so that the plastic is conveniently discharged out of the glue outlet part 21 from the flow port, the arranged flow port is opposite to the pouring gate, and the diameter of the hot nozzle cover 2 is gradually reduced along the circulation direction of the plastic. It can be understood that the glue outlet portion 21 is bowl-shaped, when plastic flows into the glue outlet portion 21, the plastic itself can generate an upward extrusion force under the action of the side wall, and the sealing needle 3 can be further transferred from the first working position to the second working position under the action of the injection molding force and the extrusion force.
Further, the hot nozzle 400 further includes a hot nozzle core 4 and an elastic member 5, the hot nozzle core 4 is disposed inside the hot nozzle cover 2, and a gap is disposed between an outer peripheral wall of the hot nozzle core 4 and an inner peripheral wall of the hot nozzle cover 2, after the plastic flows out of the hot runner main body 1, the plastic flows to the flow port through the gap, and then flows to the gate of the mold core 300 through the flow port, and the setting of the gap can not only improve the flow rate of the product at the hot nozzle cover 2, but also can improve the extrusion force generated by the plastic at the glue outlet 21, thereby facilitating the sealing and opening of the glue outlet 21 by the glue sealing needle 3.
In this embodiment, the bottom of the hot nozzle core 4 is provided with a track groove 41, the sealing needle 3 can be slidably disposed in the track groove 41, and the elastic member 5 can be disposed between the bottom of the track groove 41 and the sealing needle 3. It will be appreciated that when the elastic member 5 is pressed between the bottom of the track groove 41 and the molding pin 3, the molding pin 3 can always receive the restoring force from the elastic member 5, and thus the molding pin 3 can be maintained in the first working position. When the injection molding machine starts to work, along with the increase of injection molding force and extrusion force of plastic, the force of the glue sealing needle 3 far away from the glue outlet part 21 is larger than the elastic force of the elastic piece 5, so that the glue sealing needle 3 can be transferred from a first working position to a second working position, and the glue outlet part 21 can be opened.
Specifically, a mounting groove 42 is formed at the bottom of the track groove 41, a guide rod 43 is slidably arranged in the mounting groove 42, the guide rod 43 is connected with the end of the sealing needle 3, the elastic piece 5 is sleeved outside the guide rod 43, and the guide rod 43 can prevent the spring from radial deformation and influence the sealing effect of the sealing needle 3 on the glue outlet portion 21.
It should be noted that the length of the guide rod 43 needs to be smaller than the depth of the mounting groove 42, and the specific length of the guide rod 43 may be determined according to practical needs, which is not particularly limited in this embodiment. Of course, an anti-falling structure may be provided on the guide bar 43, and the anti-falling structure can be used to prevent the guide bar 43 from falling off from the mounting groove 42, and the specific structure of the anti-falling structure is not particularly limited in this embodiment.
Further, the outer side wall of the seal pin 3 is at least partially attached to the inner side wall of the rail groove 41. The lateral wall of seal gum needle 3 laminates with track groove 41, can prevent on the one hand that the removal orbit of seal gum needle 3 from appearing the deviation, on the other hand can prevent that the plastic from entering into the mounting groove 42 from the clearance between seal gum needle 3 and the track groove 41 and contacting with elastic component 5, and then can avoid the influence of plastic to elastic component 5.
The elastic element 5 is preferably a disc spring, and in some other possible embodiments, the elastic element 5 may also be another element with a return capability. It should be noted that, because of the high temperature of the molten plastic, the elastic member 5 is preferably made of a high temperature resistant and corrosion resistant material.
In this embodiment, a connecting portion is disposed on a peripheral wall of the thermal nozzle core 4, and the connecting portion is connected with an inner wall of the thermal nozzle cover 2, or a plurality of connecting portions are uniformly disposed on the peripheral wall of the thermal nozzle core 4, and the plurality of connecting portions are all connected with the inner wall of the thermal nozzle cover 2. It can be understood that the connecting portion, the outer side wall of the hot nozzle core 4 and the inner wall of the hot nozzle cover 2 enclose together to form a flow channel, and when the plastic flows through the flow channel, the plastic can not only improve the flow velocity of the product at the hot nozzle cover 2, but also improve the extrusion force of the plastic to the glue sealing needle 3 at the glue outlet portion 21, so that the glue sealing needle 3 is subjected to the increase of the acting force away from the pouring gate, and the sealing needle 3 is further facilitated to seal and open the glue outlet portion 21.
Specifically, the connecting portion is provided with three to three connecting portions separate the clearance into three runners, and when flowing through the runners, molten plastic becomes three from original one under the condition that the volume of plastic is unchangeable, and the cross-sectional area of each strand reduces, not only can improve the velocity of flow of product in hot nozzle cover 2 department, but also can improve the extrusion force of product to seal gum needle 3 in play gluey portion 21 department.
Along the circulation direction of plastic, the diameter of the outer wall of the hot nozzle core 4 is in a reducing arrangement, and the reducing arrangement can further reduce the cross-sectional area of the flow channel, so that the flow velocity of the plastic improved product at the hot nozzle cover 2 is further improved, and the extrusion force of the plastic to the sealing needle 3 at the glue outlet part 21 can be further improved.
Specifically, the hot nozzle core 4 is divided into an upper core and a lower core, the cross section of the flow passage between the upper core and the hot nozzle cover 2 is gradually reduced, and the cross section of the flow passage between the lower core and the hot nozzle cover 2 is gradually increased. That is, the diameter of the outer wall of the hot nozzle core 4 is increased and then reduced, and the arrangement that the diameter is increased and then reduced can further improve the extrusion force of the product on the sealing needle 3 at the glue outlet portion 21.
It should be noted that, along the flowing direction of the plastic, the diameter of the sealing needle 3 gradually decreases, and the maximum diameter of the sealing needle 3 is not smaller than the diameter of the flow port. When the injection molding machine is stopped, the sealing needle 3 can descend and seal the flow port.
Specifically, the seal pin 3 includes a sliding portion and a blocking portion connected up and down, the sliding portion is slidably connected in the track groove 41, the blocking portion is used for blocking a flow port, the diameter of the sliding portion is larger than that of the blocking portion, and a fillet is provided at the connection of the sliding portion and the connecting portion, and the provided fillet is conducive to discharging plastic from the glue portion 21.
In this embodiment, the diameter of the sliding portion is about 2 times that of the plugging portion, and in some other possible embodiments, the sliding portion may be determined according to practical needs, and the present embodiment is not particularly limited.
When the seal needle 3 is manufactured, the diameter tolerance of the sliding part is-0.002 to +0.005, and correspondingly, when the track groove 41 is machined, the diameter tolerance of the track groove 41 is +0.005 to +0.008, and the set diameter tolerance can prevent plastic from being poured into the track groove 41 or the matched and too tightly-matched sliding part from moving when the sliding part and the track groove 41 are not matched in place.
It should be noted that the heat-insulating coating is arranged outside the sealing needle 3, so that the surface of the sealing needle 3 is smooth, the friction resistance is small, and the service life of the sealing needle 3 is prolonged under the action of the heat-insulating coating.
It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.
Claims (10)
1. A hot nozzle comprising a hot runner body (1), characterized in that the hot nozzle (400) further comprises:
A hot nozzle cover (2), wherein the hot nozzle cover (2) comprises a mounting part (22) and a glue outlet part (21), the mounting part (22) is connected with the hot runner main body (1), the mounting part (22) is provided with an inner cavity connected with the hot runner main body (1), and the glue outlet part (21) is communicated with the inner cavity so that the glue outlet part (21) receives plastic in a molten state and is injected into a forming cavity of a die core (300) through the glue outlet part (21);
The sealing needle (3) is arranged in the hot nozzle cover (2) in a sliding manner, and the sealing needle (3) is provided with a first working position and a second working position for plugging and opening the glue outlet part (21); and
-An elastic element (5), said elastic element (5) being connected to said sealing needle (3) and said elastic element (5) being configured to keep said sealing needle (3) in said first working position; when the plastic flows to the glue outlet part (21), the injection pressure of the plastic can overcome the elasticity of the elastic piece (5) to enable the glue sealing needle (3) to be in the second working position.
2. The thermal nozzle of claim 1, wherein the thermal nozzle (400) further comprises:
The hot nozzle core (4) is arranged in the hot nozzle cover (2), and a gap is formed between the outer peripheral wall of the hot nozzle core (4) and the inner peripheral wall of the hot nozzle cover (2); the elastic piece (5) is arranged between the hot nozzle core (4) and the sealing needle (3).
3. The hot nozzle according to claim 2, characterized in that a track groove (41) is provided at the bottom of the hot nozzle core (4), the sealing needle (3) is slidably disposed in the track groove (41), and the elastic member (5) is capable of being disposed between the groove bottom of the track groove (41) and the sealing needle (3) in a pressing manner.
4. A nozzle according to claim 3, wherein the outer side wall of the sealing needle (3) is at least partially in abutment with the inner side wall of the track groove (41).
5. A hot nozzle according to claim 3, characterized in that the elastic element (5) is a disc spring.
6. A hot nozzle according to claim 2, characterized in that the peripheral wall of the hot nozzle core (4) is provided with a connecting portion, which is connected with the inner wall of the hot nozzle cover (2); or (b)
A plurality of connecting parts are uniformly arranged on the peripheral wall of the hot nozzle core (4), and the connecting parts are connected with the inner wall of the hot nozzle cover (2).
7. A nozzle according to claim 2, characterized in that the diameter of the outer wall of the nozzle core (4) is arranged in a variable diameter in the flow direction of the plastic.
8. A nozzle according to claim 1, characterized in that the bottom of the glue outlet (21) is provided with a flow opening, the diameter of the glue outlet (21) gradually decreasing in the direction of the plastic flow.
9. A nozzle according to claim 8, characterized in that the diameter of the sealing needle (3) decreases gradually in the direction of the plastic flow and the maximum of the diameter of the sealing needle (3) is not smaller than the diameter of the flow opening.
10. An injection molding system, comprising an injection molding machine, a panel (100), a hot runner plate (200), a mold core (300) and a hot nozzle (400) according to any one of claims 1-9, wherein the panel (100) is provided with an injection nozzle (110) connected with the injection molding machine, an injection molding channel (210) is arranged inside the hot runner plate (200), and two ends of the injection molding channel (210) are respectively connected with the injection nozzle (110) and the hot runner main body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323079655.6U CN221136740U (en) | 2023-11-15 | 2023-11-15 | Hot nozzle and injection molding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323079655.6U CN221136740U (en) | 2023-11-15 | 2023-11-15 | Hot nozzle and injection molding system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221136740U true CN221136740U (en) | 2024-06-14 |
Family
ID=91419756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323079655.6U Active CN221136740U (en) | 2023-11-15 | 2023-11-15 | Hot nozzle and injection molding system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221136740U (en) |
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2023
- 2023-11-15 CN CN202323079655.6U patent/CN221136740U/en active Active
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