CN221249695U - Hot runner anti-blocking injection molding nozzle - Google Patents
Hot runner anti-blocking injection molding nozzle Download PDFInfo
- Publication number
- CN221249695U CN221249695U CN202323185712.9U CN202323185712U CN221249695U CN 221249695 U CN221249695 U CN 221249695U CN 202323185712 U CN202323185712 U CN 202323185712U CN 221249695 U CN221249695 U CN 221249695U
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- cavity
- pipe body
- reflux
- main pipe
- fluid pump
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 40
- 238000010992 reflux Methods 0.000 claims abstract description 27
- 239000012530 fluid Substances 0.000 claims abstract description 23
- 238000002844 melting Methods 0.000 claims abstract description 23
- 230000008018 melting Effects 0.000 claims abstract description 23
- 238000002347 injection Methods 0.000 claims abstract description 16
- 239000007924 injection Substances 0.000 claims abstract description 16
- 239000007921 spray Substances 0.000 claims abstract description 14
- 238000004321 preservation Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000005485 electric heating Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims 1
- 239000012778 molding material Substances 0.000 abstract description 16
- 238000004140 cleaning Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 24
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 239000002994 raw material Substances 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000006052 feed supplement Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model relates to the technical field of injection nozzles, in particular to a hot runner anti-blocking injection nozzle which comprises a main pipe body and a spray head, wherein a cavity and a backflow cavity are arranged in the main pipe body; the device also comprises a plugging device, a melting tank, a fluid pump and a first three-way electromagnetic valve, wherein a return pipe and a discharge pipe are arranged on the side surface of the melting tank; the fluid pump is provided with an inlet end and an outlet end, the reflux joint and the discharge pipe are connected with the inlet end of the fluid pump, and the first three-way electromagnetic valve is provided with a main joint connected with the outlet end of the fluid pump and two branch joints respectively communicated with the reflux pipe and the feed joint; residual injection molding materials flow back into the melting tank through the return pipe, so that the injection molding materials in the cavity and the spray head are prevented from being solidified to be blocked, the blocking of injection molding nozzles is prevented, the time for replacing the nozzles and cleaning the nozzles is shortened, and the production efficiency is improved.
Description
Technical Field
The utility model relates to the technical field of injection nozzles, in particular to a hot runner anti-blocking injection nozzle.
Background
Injection molding is carried out by injecting molten plastic into a mold cavity through an injection nozzle arranged on an injection molding machine, and cooling and solidifying to obtain a molded product. The molten plastic has a fast solidification speed, and is easy to solidify after injection molding is stopped or in the process of suspending injection molding, so that the nozzle is blocked, the time is consumed for replacing the nozzle, cleaning the nozzle, and the production efficiency is reduced.
Disclosure of utility model
1. Technical problem to be solved
The utility model aims to provide a hot runner anti-blocking injection nozzle, which is used for backflow of injection molding raw materials after injection molding is stopped, so that the nozzle is prevented from being blocked.
2. Technical proposal
The utility model is realized by the following technical scheme:
The utility model provides a hot runner anti-blocking injection molding nozzle which comprises a main pipe body and a nozzle connected to the end part of the main pipe body, wherein a cavity communicated with the nozzle is arranged in the main pipe body, a feeding connector communicated with the cavity is arranged on the side surface of the main pipe body, a backflow cavity communicated with the cavity is also arranged in the main pipe body, and a backflow connector communicated with the backflow cavity is arranged on the side surface of the main pipe body; the device also comprises a plugging device, a melting tank, a fluid pump and a first three-way electromagnetic valve, wherein the plugging device is used for controlling whether the reflux cavity is communicated with the cavity or not; the fluid pump is provided with an inlet end and an outlet end, the backflow connector and the discharge pipe are connected with the inlet end of the fluid pump, and the first three-way electromagnetic valve is provided with a main connector connected with the outlet end of the fluid pump and two branch connectors respectively communicated with the backflow pipe and the feeding connector.
Further, the hydraulic control system also comprises a second three-way electromagnetic valve, wherein the second three-way electromagnetic valve is provided with a main joint connected with the inlet end of the fluid pump and two branch joints respectively communicated with the reflux joint and the discharge pipe.
Furthermore, a conical cavity is arranged between the cavity and the backflow cavity, the conical cavity and the cavity are sequentially arranged along the axial direction of the main pipe body, the inner diameter of the conical cavity gradually increases from one end close to the backflow cavity to the other end, the plugging device at least comprises a conical plug and a control piece, the taper of the conical plug is the same as that of the conical cavity, and the plugging device can be driven by the control piece to axially move to a position where the outer wall of the conical plug is completely attached to the inner wall of the conical cavity along the axial direction of the main pipe body.
Furthermore, one side of the reflux cavity far away from the conical cavity is provided with a sliding hole coaxial with the reflux cavity and the conical cavity, the control piece comprises a cylinder, a connecting rod connected to the output end of the cylinder, a piston connected to the end part of the connecting rod and a thin rod connected to the other side of the piston, the other end of the thin rod is fixedly connected with the conical plug, and the piston is in sliding connection with the sliding hole.
Furthermore, the opening part of the sliding hole is provided with a limiting protrusion, the outer side wall of the connecting rod is provided with a baffle ring, and the baffle ring can move along with the connecting rod to be in contact with the limiting protrusion so as to limit the minimum retraction amount of the cylinder.
Furthermore, the outer wall surface of the spray head is provided with a groove in a spiral shape in a surrounding mode, an electric heating wire is embedded in the groove, and a heat preservation sleeve is sleeved outside the spray head.
Further, the device also comprises a bracket, and the melting tank, the fluid pump, the air cylinder and the main pipe body are fixedly connected to the bracket.
3. Advantageous effects
Compared with the prior art, the utility model has the following beneficial effects:
After injection molding is stopped, the first three-way electromagnetic valve is switched to be communicated with the liquid pump and the return pipe, the second three-way electromagnetic valve is switched to be communicated with the liquid pump and the return joint, and the cylinder stretches to drive the conical plug to axially move along the main pipe body so as to be communicated between the return cavity and the cavity; the liquid pump starts, pumps up the residual injection molding material in cavity, backward flow chamber, the shower nozzle to in the melting tank is refluxed through the back flow, thereby prevent cavity, the interior injection molding material solidification of shower nozzle and take place to block up, effectively prevent to appear moulding plastics the nozzle and stop up the condition appearance, shortened the time of changing the nozzle and cleaning the nozzle, improved production efficiency.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is an enlarged partial view of portion A of FIG. 1;
FIG. 3 is an enlarged partial view of portion B of FIG. 1;
FIG. 4 is a diagram of the connection of the various parts of the present utility model;
1. A main pipe body; 11. a cavity; 12. a reflow chamber; 13. a conical cavity; 14. a slide hole; 15. a feed joint; 16. a return joint; 17. a limit protrusion; 2. a spray head; 21. a groove; 22. heating wires; 23. a thermal insulation sleeve; 3. a plugging device; 31. a cone-shaped plug; 32. a control member; 321. a cylinder; 322. a connecting rod; 323. a piston; 324. a thin rod; 325. a baffle ring; 4. a melting tank; 41. a return pipe; 42. a discharge pipe; 43. a feed supplement port; 5. a fluid pump; 51. an inlet end; 52. an outlet end; 6. a first three-way electromagnetic valve; 7. a second three-way electromagnetic valve; 8. and (3) a bracket.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Example 1:
Referring to fig. 1-2, a hot runner anti-blocking injection molding nozzle comprises a main pipe body 1, a nozzle 2 is connected to the end part of the main pipe body 1, a groove 21 is formed on the outer wall surface of the nozzle 2 in a spiral surrounding mode, an electric heating wire 22 is embedded in the groove 21, a heat preservation sleeve 23 is sleeved outside the nozzle 2, the electric heating wire 22 can heat partial residual molten injection molding material of the nozzle 2, the nozzle 2 is prevented from being blocked due to solidification, and the heat preservation sleeve 23 plays a role in heat preservation.
A cavity 11 communicated with the spray head 2 is arranged in the pipe body, a reflux cavity 12 communicated with the cavity 11 is arranged in the pipe body, a feeding joint 15 communicated with the cavity 11 is arranged on the side surface of the main pipe body 1, and molten injection molding material is introduced into the cavity 11 at the position of the feeding joint 15; the main pipe body 1 is provided on the side with a return joint 16 communicating with the return chamber 12.
In addition, the injection nozzle also comprises a plugging device 3, a melting tank 4, a fluid pump 5 and a first three-way electromagnetic valve 6; still include support 8, melting tank 4, fluid pump 5, cylinder 321, main pipe body 1 all fixed connection is on support 8.
Wherein, the melting tank 4 is a container with a built-in heating device, the injection molding raw material is melted in the melting tank 4, a return pipe 41 and a discharge pipe 42 are arranged on the side surface of the melting tank 4, the return pipe 41 is used for guiding the molten injection molding material back into the melting tank 4, the discharge pipe 42 is used for conveying the molten injection molding material to the outside of the melting tank 4, and a feed supplement port 43 is also arranged on the side surface of the melting tank 4 and used for supplementing the injection molding raw material into the melting tank 4;
The plugging device 3 controls whether the reflux cavity 12 is communicated with the cavity 11 or not, the fluid pump 5 is used for pumping molten injection molding raw materials, the first three-way electromagnetic valve 6 is connected with the PLC, the circulation guide of the first three-way electromagnetic valve 6 is controlled through an electric signal, and the first three-way electromagnetic valve 6 is provided with a main joint and two branch joints;
The fluid pump 5 has an inlet end 51 and an outlet end 52, both the return connection 16 and the discharge pipe 42 are connected to the inlet end 51 of the fluid pump 5, the main connection of the first three-way solenoid valve 6 is connected to the outlet end 52 of the fluid pump 5, and the two branch connections of the first three-way solenoid valve 6 are respectively connected to the return pipe 41 and the feed connection 15.
A conical cavity 13 is arranged between the cavity 11 and the reflux cavity 12, the conical cavity 13 and the cavity 11 are sequentially arranged along the axial direction of the main pipe body 1, the inner diameter of the conical cavity 13 gradually increases from one end close to the reflux cavity 12 to the other end, and the plugging device 3 at least comprises a conical plug 31 and a control piece 32. The sliding hole 14 coaxial with the reflux cavity 12 and the conical cavity 13 is formed in one side, far away from the conical cavity 13, of the reflux cavity 12, and the control piece 32 comprises an air cylinder 321, a connecting rod 322 connected to the output end of the air cylinder 321, a piston 323 connected to the end part of the connecting rod 322, and a thin rod 324 connected to the other side of the piston 323, wherein the other end of the thin rod 324 is fixedly connected with the conical plug 31, and the piston 323 is in sliding connection with the sliding hole 14. The cylinder 321 stretches and contracts to drive the connecting rod 322, the piston 323, the slender rod 324 and the conical plug 31 to slide along the axial direction of the main pipe body 1, and the conical plug 31 can control whether the reflux cavity 12 is communicated with the cavity 11 or not along with the stretching and contracting of the cylinder 321.
In this embodiment, the taper of the tapered plug 31 is the same as that of the tapered cavity 13, and the tapered plug 31 can be driven by the control member 32 to move to a position where its outer wall is completely attached to the inner wall of the tapered cavity 13, so as to completely block the communication between the reflow cavity 12 and the cavity 11.
In addition, in this embodiment, referring to fig. 3, a limiting protrusion 17 is disposed at the mouth of the sliding hole 14, a retaining ring 325 is disposed on the outer side wall of the connecting rod 322, when the cylinder 321 drives the tapered plug 31 to retract to seal, the retaining ring 325 moves along with the connecting rod 322 to a position contacting the limiting protrusion 17, at this time, the limiting protrusion 17 limits the minimum retraction amount of the cylinder 321, so as to prevent the tapered plug 31 from being excessively clamped in the tapered cavity 13 and being difficult to loosen, and also limit the piston 323 to slide in the sliding hole 14 only, so as to prevent the liquid in the backflow cavity 12 from exuding from the sliding hole 14.
Working principle:
During injection molding, the first three-way electromagnetic valve 6 is switched to a liquid pump to be communicated with the feeding connector 15, and the cylinder 321 is contracted to drive the conical plug 31 to be blocked in the conical cavity 13 and prevent the reflux cavity 12 from being communicated with the cavity 11; the liquid pump is started, and the molten injection molding material is sequentially discharged from the nozzle 2 for injection molding through the melting tank 4, the discharging pipe 42, the inlet end 51 of the liquid pump, the outlet end 52 of the liquid pump, the first three-way electromagnetic valve 6, the feeding connector 15 and the cavity 11.
When injection molding is stopped, the first three-way electromagnetic valve 6 is switched to the liquid pump to be communicated with the return pipe 41, and the cylinder 321 stretches to drive the conical plug 31 to axially move along the main pipe body 1 so as to be communicated between the return cavity 12 and the cavity 11; the liquid pump is started to pump the residual injection molding materials in the cavity 11, the backflow cavity 12 and the spray head 2, and the residual injection molding materials flow back into the melting tank 4 through the backflow pipe 41, so that the injection molding materials in the cavity 11 and the spray head 2 are prevented from being solidified to be blocked.
Example 2:
The difference from embodiment 1 is that the present embodiment further includes a second three-way electromagnetic valve 7, the second three-way electromagnetic valve 7 also has a main joint and two branch joints, the main joint of the second three-way electromagnetic valve 7 is connected with the inlet end 51 of the flow pump, and the two joints are respectively communicated with the return joint 16 and the discharge pipe 42.
Referring to fig. 4, during injection molding, the first three-way electromagnetic valve 6 is switched to a liquid pump to be communicated with the feed connector 15, the second three-way electromagnetic valve 7 is switched to a liquid pump to be communicated with the discharge pipe 42, and the cylinder 321 is contracted to drive the cone-shaped plug 31 to be blocked in the cone-shaped cavity 13 and prevent the reflux cavity 12 from being communicated with the cavity 11; the liquid pump is started, and the molten injection molding material is sequentially discharged from the nozzle 2 for injection molding through the melting tank 4, the discharging pipe 42, the inlet end 51 of the liquid pump, the outlet end 52 of the liquid pump, the first three-way electromagnetic valve 6, the feeding connector 15 and the cavity 11.
When injection molding is stopped, the first three-way electromagnetic valve 6 is switched to be communicated with the liquid pump and the return pipe 41, the second three-way electromagnetic valve 7 is switched to be communicated with the liquid pump and the return joint 16, and the cylinder 321 stretches to drive the conical plug 31 to axially move along the main pipe body 1 so as to be communicated between the return cavity 12 and the cavity 11; the liquid pump is started to pump the residual injection molding materials in the cavity 11, the backflow cavity 12 and the spray head 2, and the residual injection molding materials flow back into the melting tank 4 through the backflow pipe 41, so that the injection molding materials in the cavity 11 and the spray head 2 are prevented from being solidified to be blocked.
In addition, in the retarding injection molding, the first three-way electromagnetic valve 6 is switched to the liquid pump to be communicated with the feeding connector 15, the second three-way electromagnetic valve 7 is switched to the liquid pump to be communicated with the reflux connector 16, the cylinder 321 stretches to drive the conical plug 31 to axially move along the main pipe body 1, so that the reflux cavity 12 and the cavity 11 are communicated, liquid is pumped at a low speed by the liquid pump, part of molten injection plastic in the reflux cavity 12 and the cavity 11 is sprayed out from the nozzle 2, and part of molten injection plastic circulates through the reflux connector 16, the liquid pump, the feeding connector 15 and the cavity 11 to prevent solidification; after a certain time, the second three-way electromagnetic valve 7 is switched to the liquid pump to be communicated with the discharging pipe 42, the molten plastic injection material is supplemented into the cavity 11, and the switching passage of the second three-way electromagnetic valve 7 is automatically controlled to ensure continuous feeding.
The above examples are merely illustrative of the preferred embodiments of the present utility model and are not intended to limit the spirit and scope of the present utility model. Various modifications and improvements of the technical scheme of the present utility model will fall within the protection scope of the present utility model without departing from the design concept of the present utility model, and the technical content of the present utility model is fully described in the claims.
Claims (7)
1. The hot runner anti-blocking injection molding nozzle comprises a main pipe body (1) and a spray head (2) connected to the end part of the main pipe body (1), wherein a cavity (11) communicated with the spray head (2) is formed in the main pipe body (1), and a feeding connector (15) communicated with the cavity (11) is arranged on the side surface of the main pipe body (1), and the hot runner anti-blocking injection molding nozzle is characterized in that a backflow cavity (12) communicated with the cavity (11) is further formed in the main pipe body (1), and a backflow connector (16) communicated with the backflow cavity (12) is arranged on the side surface of the main pipe body (1); the device further comprises a plugging device (3), a melting tank (4), a fluid pump (5) and a first three-way electromagnetic valve (6) which are used for controlling whether the reflux cavity (12) is communicated with the cavity (11), wherein a reflux pipe (41) and a discharge pipe (42) are arranged on the side surface of the melting tank (4); the fluid pump (5) has an inlet end (51) and an outlet end (52), the return line (16), the discharge line (42) are connected to the inlet end (51) of the fluid pump (5), and the first three-way solenoid valve (6) has a main connection to the outlet end (52) of the fluid pump (5) and two branch connections which communicate with the return line (41) and the feed connection (15), respectively.
2. The hot runner block-resistant injection nozzle of claim 1, wherein: the device also comprises a second three-way electromagnetic valve (7), wherein the second three-way electromagnetic valve (7) is provided with a main joint connected with the inlet end (51) of the fluid pump (5) and two branch joints respectively communicated with the reflux joint (16) and the discharging pipe (42).
3. A hot runner block-resistant injection nozzle as claimed in claim 1 or claim 2 wherein: the utility model discloses a main pipe body, including cavity (11) and reflux chamber (12), be provided with toper chamber (13) between cavity (11) and the reflux chamber (12), toper chamber (13), cavity (11) set gradually along the axial of main pipe body (1), the internal diameter in toper chamber (13) is by being close to reflux chamber (12) one end to the other end grow gradually, plugging device (3) include taper end cap (31) and control piece (32) at least, the taper of taper end cap (31) is the same with the taper of toper chamber (13) to can control piece (32) drive and follow main pipe body (1) axial displacement to its outer wall and the position that the toper chamber (13) inner wall is laminated completely.
4. A hot runner block-resistant injection nozzle as claimed in claim 3, wherein: one side of the reflux cavity (12) far away from the conical cavity (13) is provided with a slide hole (14) coaxial with the reflux cavity (12) and the conical cavity (13), the control piece (32) comprises a cylinder (321), a connecting rod (322) connected to the output end of the cylinder (321), a piston (323) connected to the end part of the connecting rod (322) and a slender rod (324) connected to the other side of the piston (323), the other end of the slender rod (324) is fixedly connected with the conical plug (31), and the piston (323) is in sliding connection with the slide hole (14).
5. The hot runner block-resistant injection nozzle of claim 4, wherein: the mouth of the sliding hole (14) is provided with a limiting protrusion (17), the outer side wall of the connecting rod (322) is provided with a baffle ring (325), and the baffle ring (325) can move along with the connecting rod (322) to be in contact with the limiting protrusion (17) so as to limit the minimum retraction amount of the air cylinder (321).
6. The hot runner block-resistant injection nozzle of claim 1, wherein: the outer wall surface of the spray head (2) is provided with a groove (21) in a spiral surrounding mode, an electric heating wire (22) is embedded in the groove (21), and a heat preservation sleeve (23) is sleeved outside the spray head (2).
7. The hot runner block-resistant injection nozzle of claim 1, wherein: still include support (8), melting case (4), fluid pump (5), cylinder (321), be responsible for body (1) all fixed connection on support (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323185712.9U CN221249695U (en) | 2023-11-24 | 2023-11-24 | Hot runner anti-blocking injection molding nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323185712.9U CN221249695U (en) | 2023-11-24 | 2023-11-24 | Hot runner anti-blocking injection molding nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221249695U true CN221249695U (en) | 2024-07-02 |
Family
ID=91660556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323185712.9U Active CN221249695U (en) | 2023-11-24 | 2023-11-24 | Hot runner anti-blocking injection molding nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221249695U (en) |
-
2023
- 2023-11-24 CN CN202323185712.9U patent/CN221249695U/en active Active
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| Date | Code | Title | Description |
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