CN114102997A - Injection molding machine nozzle of leak protection material - Google Patents
Injection molding machine nozzle of leak protection material Download PDFInfo
- Publication number
- CN114102997A CN114102997A CN202010905277.4A CN202010905277A CN114102997A CN 114102997 A CN114102997 A CN 114102997A CN 202010905277 A CN202010905277 A CN 202010905277A CN 114102997 A CN114102997 A CN 114102997A
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- China
- Prior art keywords
- plugging
- blocking
- needle
- injection molding
- circle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/20—Injection nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/20—Injection nozzles
- B29C45/23—Feed stopping equipment
- B29C45/231—Needle valve systems therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/20—Injection nozzles
- B29C2045/207—Preventing stringing of the moulding material
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a leakage-proof injection molding machine nozzle which comprises a nozzle main body and a blocking needle, wherein a sizing material flow passage communicated with a discharge port at the lower end and a blocking needle hole are arranged in the nozzle main body, the lower end of the blocking needle hole is communicated with the sizing material flow passage, the blocking needle is arranged in the blocking needle hole and can move up and down, a circle of first blocking surface and a circle of second blocking surface are arranged above the discharge port in the sizing material flow passage, the first blocking surface is positioned above the second blocking surface, a circle of third blocking surface and a circle of fourth blocking surface are arranged on the outer peripheral surface of the blocking needle, and the third blocking surface is positioned above the fourth blocking surface; when the plugging needle moves downwards, the first plugging surface and the third plugging surface are tightly attached to form a first plugging structure, and meanwhile, the second plugging surface and the fourth plugging surface are tightly attached to form a second plugging structure. According to the injection molding machine nozzle, the phenomenon of material leakage at the discharge port when injection molding is stopped can be effectively prevented through the two plugging structures, and the use quality of the nozzle is ensured.
Description
Technical Field
The invention relates to the field of injection molding and spraying, in particular to a leakage-proof injection molding machine nozzle.
Background
The nozzle of the injection molding machine is an intermediate structure for introducing molten plastic in a barrel into a mold, one end of which is in contact with an inlet of a main flow passage of the mold, and a molten material body in the barrel is injected into the mold through the nozzle under the action of pressure.
Referring to the attached drawings 1 to 4, in the existing nozzle of the injection molding machine, a discharge port 12 is arranged at the lower end of a nozzle body 1, a glue material flow channel 11 and a needle blocking hole 13 are arranged in the nozzle body 1, a pull rod 3 swings up and down to drive a needle blocking 2 to move up and down in the needle blocking hole 13, the lower end of the needle blocking hole 13 is communicated with the glue material flow channel 11, and the needle blocking 2 can descend to enter the glue material flow channel 11 and block the discharge port 12. During injection molding, the pull rod 3 drives the blocking needle 2 to ascend, injection molding glue flows downwards through the glue material runner 11 and is ejected out of the discharge port 12 to a mold, and after injection molding is completed, the pull rod 3 is pulled upwards to drive the blocking needle 2 to descend to block the discharge port 12 so as to prevent the glue material from overflowing from the discharge port 12.
The existing injection molding machine nozzle has the following problems: (1) the lower end of the blocking needle 2 and the rubber material runner 11 are only provided with a blocking structure at the discharge port 12, and as the service life of the nozzle of the injection molding machine is prolonged, the molten material wears the blocking structure, the blocking performance can be gradually reduced, the discharge port 12 of the nozzle cannot be effectively blocked, and material leakage is caused. (2) The needle 2 has clearance fit when moving up and down in the stifled pinhole 13, when moulding plastics, inner chamber pressure can make the sizing material spill over between stifled needle 2 and the pull rod 3 along the clearance between stifled needle 2 and the stifled pinhole 13, can cause stifled needle 2 unable up-and-down motion after piling up for a long time, the discharge gate 12 of nozzle can not be blockked up to stifled needle 2, will produce the nozzle and leak the material, the sizing material is persisted to the inner chamber and continuously spills, cause extravagant and pollution, or plug up the mould inner flow way, damage the mould.
Disclosure of Invention
In view of the above disadvantages of the prior art, the technical problem to be solved by the present invention is to provide a leakage-proof injection molding machine nozzle, which can effectively prevent the leakage phenomenon at the discharge port when the injection molding is stopped, and ensure the use quality of the nozzle.
In order to achieve the purpose, the invention provides a leakage-proof injection molding machine nozzle which comprises a nozzle main body and a blocking needle, wherein a sizing material flow passage communicated with a discharge port at the lower end and a blocking needle hole are arranged in the nozzle main body, the lower end of the blocking needle hole is communicated with the sizing material flow passage, the blocking needle is arranged in the blocking needle hole and can move up and down, a circle of first blocking surface and a circle of second blocking surface are arranged above the discharge port in the sizing material flow passage, the first blocking surface is positioned above the second blocking surface, a circle of third blocking surface and a circle of fourth blocking surface are arranged on the outer peripheral surface of the blocking needle, and the third blocking surface is positioned above the fourth blocking surface; when the plugging needle moves downwards, the first plugging surface and the third plugging surface are tightly attached to form a first plugging structure, and meanwhile, the second plugging surface and the fourth plugging surface are tightly attached to form a second plugging structure.
Further, the first plugging surface is a circle of vertical surface, and the third plugging surface is a circle of inclined surface.
Furthermore, the second plugging surface is a circle of inclined surface, the lower end of the second plugging surface is connected with the discharge hole, and the fourth plugging surface is also a circle of inclined surface, and the inclined angle of the fourth plugging surface is different from that of the second plugging surface.
Furthermore, a circle of fifth plugging surface is arranged at the lower end opening of the plugging needle hole of the nozzle main body along the circumferential direction of the plugging needle hole, a circle of sixth plugging surface surrounding the circumferential direction of the rod body is arranged in the middle of the plugging needle, and the fifth plugging surface is tightly contacted with the sixth plugging surface when the plugging needle rises to form an upper plugging structure.
Furthermore, the middle part of the plugging needle is provided with a conical platform part with a downward conical surface, and the sixth plugging surface is arranged at the upper end of the conical platform part.
Further, the fifth plugging surface and the sixth plugging surface are both annular.
Further, the nozzle body is provided with a ring of annular groove on the outer side of the fifth sealing surface, and the outer edge of the sixth sealing surface is positioned in the annular groove.
Furthermore, a pull rod capable of rotating up and down is arranged in the nozzle main body, and the pull rod is connected with the upper end of the blocking needle.
As described above, the injection molding machine nozzle according to the present invention has the following advantageous effects:
through the arrangement that the first sealing surface and the third sealing surface which are matched with each other and the second sealing surface and the fourth sealing surface which are matched with each other are tightly attached to each other, when the injection molding work is carried out, the sealing needle rises, the first sealing surface and the third sealing surface are separated, the second sealing surface and the fourth sealing surface are separated, and the molten rubber material flows into the discharge port from the rubber material flow passage and is sprayed out. After the injection molding is finished, the blocking needle moves downwards, the first blocking surface and the third blocking surface are tightly attached to form a first blocking structure, the molten rubber material is blocked, meanwhile, the second blocking surface and the fourth blocking surface are tightly attached to form a second blocking structure, and the molten rubber material is blocked again, so that the stored material is prevented from overflowing from the discharge port, and the molten rubber material is effectively separated from the injection mold. And if the second plugging structure is not tightly sealed due to abrasion, only a small amount of leakage occurs. According to the injection molding machine nozzle, the two plugging structures can effectively prevent the material leakage phenomenon at the discharge port when the injection molding is stopped, and the use quality of the nozzle is ensured.
Drawings
FIG. 1 is a schematic of the internal structure of an injection molding machine nozzle of prior art design.
Fig. 2 is a schematic view of the internal structure of an injection molding machine nozzle of the prior art, which is a half-sectional view at another angle.
Fig. 3 is an enlarged view of circle a in fig. 1.
Fig. 4 is a schematic view of a discharge port blocked by a blocking needle in the prior art.
Fig. 5 is a schematic view of the internal structure of the injection molding machine nozzle of the present invention in an injection-molding-in-progress state.
Fig. 6 is an enlarged view of circle B in fig. 5.
Fig. 7 is an enlarged view of circle C in fig. 5.
Fig. 8 is an internal structural view of the nozzle of the injection molding machine of the present invention in an injection stop state.
Fig. 9 is an enlarged view of circle D in fig. 8.
Fig. 10 is an enlarged view of circle E in fig. 8.
Fig. 11 is a schematic view showing the internal structure of the nozzle of the injection molding machine of the present invention, which is a half sectional view at another angle.
Description of the element reference numerals
1 nozzle body
11 sizing material runner
12 discharge hole
13 pinhole plugging
14 second plugging surface
15 first plugging surface
16 fifth plugging surface
17 annular groove
2 Block needle
21 fourth plugging surface
22 third plugging surface
23 sixth plugging surface
24 conical frustum part
3 draw bar
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be regarded as the scope of the present invention without substantial changes in the technical contents.
Referring to fig. 5 to 11, the invention provides a leakage-proof injection molding machine nozzle, which comprises a nozzle main body 1 and a blocking needle 2, wherein a rubber material flow passage 11 communicated with a lower end discharge port 12 and a blocking needle hole 13 are arranged in the nozzle main body 1, the lower end of the blocking needle hole 13 is communicated with the rubber material flow passage 11, the blocking needle 2 is arranged in the blocking needle hole 13 and can move up and down, the lower end of the blocking needle 2 can extend into the rubber material flow passage 11 and reach the discharge port 12 when moving downwards, a circle of first blocking surface 15 and a circle of second blocking surface 14 are arranged above the discharge port 12 in the rubber material flow passage 11, the first blocking surface 15 is positioned above the second blocking surface 14, a circle of third blocking surface 22 and a circle of fourth blocking surface 21 are arranged on the outer peripheral surface of the blocking needle 2, and the third blocking surface 22 is positioned above the fourth blocking surface 21; when the plugging needle 2 moves downwards, the first plugging surface 15 and the third plugging surface 22 are tightly attached to form a first plugging structure, and meanwhile, the second plugging surface 14 and the fourth plugging surface 21 are tightly attached to form a second plugging structure.
The main working principle of the injection molding machine nozzle is as follows: during the injection molding operation, referring to fig. 5 and 6, the blocking needle 2 rises, the first blocking surface 15 is separated from the third blocking surface 22, the second blocking surface 14 is separated from the fourth blocking surface 21, and the molten rubber flows into the rubber material flow passage 11, flows into the discharge port 12, is sprayed out, and is injected into the mold. After the injection molding is finished, referring to fig. 8 and 9, the pressure in the nozzle is eliminated, the blocking needle 2 moves downwards, the first blocking surface 15 and the third blocking surface 22 are tightly attached to form a first blocking structure to block molten rubber, meanwhile, the second blocking surface 14 and the fourth blocking surface 21 are tightly attached to form a second blocking structure, and the molten rubber is blocked again, so that the stored rubber is prevented from overflowing from the discharge port 12, and the molten rubber is effectively separated from the injection mold. And the molten rubber material remained between the first blocking structure and the second blocking structure loses pressure support, and if the second blocking structure is not tightly sealed due to abrasion, only a small amount of leakage occurs. According to the injection molding machine nozzle, the two plugging structures are arranged, so that the phenomenon of material leakage at the discharge port 12 when injection molding is stopped can be effectively prevented, and the use quality of the nozzle is ensured.
In the present application, the first sealing surface 15 and the third sealing surface 22, and the second sealing surface 14 and the fourth sealing surface 21 may be in surface contact or line contact, so as to ensure the sealing function.
Referring to fig. 3 to 11, the present invention will be further described with reference to a specific embodiment.
Referring to fig. 6 and 9, in the present embodiment, the first blocking surface 15 is a circle of vertical surface, the third blocking surface 22 is a circle of inclined surface, and the second blocking surface 14 and the first blocking surface 15 can form a linear contact, and under a certain pressure, the second blocking surface 14 and the first blocking surface are in a more tight contact, and of course, the first blocking surface may also be a circle of inclined surface. Similarly, the second plugging surface 14 is a circle of inclined surface, the lower end of which is connected with the discharge port 12, and the fourth plugging surface 21 is also a circle of inclined surface, and the inclined angle of which is different from that of the second plugging surface 14, so that line contact is formed between the second plugging surface 14 and the fourth plugging surface 21, and the plugging effect is ensured. Of course, in the present application, the first blocking surface 15 and the third blocking surface 22, and the second blocking surface 14 and the fourth blocking surface 21 are not limited to the above specific structural forms, and other reasonable structures may be adopted, so that the above functions can be realized without affecting the flow of the sizing material.
In the present embodiment, as a preferable design, referring to fig. 7 and 10, the nozzle body 1 is provided with a circle of fifth blocking surface 16 at the lower port of the needle blocking hole 13 along the circumferential direction of the needle blocking hole 13, the middle part of the needle blocking 2 is provided with a circle of sixth blocking surface 23 around the circumferential direction of the rod body, and the fifth blocking surface 16 and the sixth blocking surface 23 closely contact to form an upper blocking structure when the needle blocking 2 ascends. During injection molding, the blocking needle 2 rises, the rubber material flows into the discharge port 12 from the rubber material flow passage 11 and then is sprayed out to the mold, the sixth blocking surface 23 is tightly attached to the fifth blocking surface 16 at the moment and is matched with the fifth blocking surface to form a sealing surface, so that the rubber material in the rubber material flow passage 11 cannot enter the blocking needle hole 13, the phenomenon that the rubber material overflows into the blocking needle hole 13 when injection molding is performed is effectively prevented, and the phenomenon that the discharge port 12 cannot be smoothly plugged by the blocking needle 13 is avoided.
As a preferable design, referring to fig. 5, 7 and 10, in this embodiment, the middle part of the plugging needle 2 has a conical platform part 24 with a downward conical surface, the middle part of the plugging needle 2 is stepped, and the sixth plugging surface 23 is arranged at the upper end of the conical platform part 24, so that during injection molding, the pressure of the nozzle cavity acts on the conical surface of the conical platform part 24, so that the sixth plugging surface 23 and the fifth plugging surface 16 can be further close to each other, and the sealing effect is ensured.
In the present embodiment, referring to fig. 5 and 10, the fifth blocking surface 16 and the sixth blocking surface 23 are both circular, and referring to fig. 4 and 5, a circle of annular groove 17 is provided outside the fifth blocking surface 16, and the outer edge of the sixth blocking surface 23 is located in the annular groove 17, so that the contact area between the fifth blocking surface 16 and the sixth blocking surface 23 can be reduced as much as possible by the annular groove 17, and under the condition of a certain pressure applied on the blocking needle 2, the pressure between the fifth blocking surface 16 and the sixth blocking surface 23 is higher, the contact is tighter, and the sealing effect is better.
In this embodiment, referring to fig. 6, a pull rod 3 capable of rotating up and down is arranged in the nozzle body 1, the pull rod 3 is connected with the upper end of the blocking needle 2, and the blocking needle 2 is controlled to move up and down by shifting the pull rod 3 up and down.
By last knowing, the injection molding machine nozzle in this embodiment, through first block structure and second block structure, make stifled needle 2 realize the shutoff to discharge gate 12 effectively, the material leakage phenomenon appears in the discharge gate when preventing to mould plastics and stop, and simultaneously, through last block structure, overflow when preventing effectively to mould plastics to the phenomenon in stifled pinhole 13, thereby avoid causing stifled needle 13 can't plug up the phenomenon of discharge gate 12 down smoothly, the problem of material leakage appears easily in the nozzle in having solved current design from two aspects, guarantee nozzle use quality, and simple structure, job stabilization is reliable.
In conclusion, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. The utility model provides an injection molding machine nozzle of leak protection material, includes nozzle main part (1) and stifled needle (2), be equipped with in nozzle main part (1) and put through sizing material runner (11) of lower extreme discharge gate (12) and stifled pinhole (13), stifled pinhole (13) lower extreme and sizing material runner (11) intercommunication, stifled needle (2) are established in stifled pinhole (13) and can reciprocate its characterized in that: a circle of first plugging surface (15) and a circle of second plugging surface (14) are arranged above the discharge port (12) in the sizing material flow passage (11), the first plugging surface (15) is positioned above the second plugging surface (14), a circle of third plugging surface (22) and a circle of fourth plugging surface (21) are arranged on the outer peripheral surface of the plugging needle (2), and the third plugging surface (22) is positioned above the fourth plugging surface (21); when the plugging needle (2) moves downwards, the first plugging surface (15) is tightly attached to the third plugging surface (22) to form a first plugging structure, and meanwhile, the second plugging surface (14) is tightly attached to the fourth plugging surface (21) to form a second plugging structure.
2. The injection molding machine nozzle of claim 1, wherein: the first plugging surface (15) is a circle of vertical surface, and the third plugging surface (22) is a circle of inclined surface.
3. The injection molding machine nozzle of claim 1, wherein: the second plugging surface (14) is a circle of inclined surface, the lower end of the second plugging surface is connected with the discharge hole (12), and the fourth plugging surface (21) is also a circle of inclined surface, and the inclined angle of the fourth plugging surface is different from that of the second plugging surface (14).
4. The injection molding machine nozzle of claim 1, wherein: nozzle main part (1) is equipped with round fifth shutoff face (16) along stifled pinhole (13) circumference in stifled pinhole (13) lower port department, stifled needle (2) middle part has sixth shutoff face (23) around shank circumference round, fifth shutoff face (16) and sixth shutoff face (23) closely contact, constitute plugging structure when stifled needle (2) rise.
5. The injection molding machine nozzle of claim 4, wherein: the middle part of the plugging needle (2) is provided with a conical table part (24) with a downward conical surface, and the sixth plugging surface (23) is arranged at the upper end of the conical table part (24).
6. The injection molding machine nozzle of claim 1, wherein: the fifth sealing surface (16) and the sixth sealing surface (23) are both annular.
7. An injection molding machine nozzle as claimed in claim 4 or 6, wherein: the nozzle body (1) is provided with a ring of annular groove (17) on the outer side of a fifth plugging surface (16), and the outer edge of a sixth plugging surface (23) is positioned in the annular groove (17).
8. The injection molding machine nozzle of claim 1, wherein: the nozzle body (1) is internally provided with a pull rod (3) which can rotate up and down, and the pull rod (3) is connected with the upper end of the blocking needle (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010905277.4A CN114102997A (en) | 2020-09-01 | 2020-09-01 | Injection molding machine nozzle of leak protection material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010905277.4A CN114102997A (en) | 2020-09-01 | 2020-09-01 | Injection molding machine nozzle of leak protection material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114102997A true CN114102997A (en) | 2022-03-01 |
Family
ID=80360412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010905277.4A Pending CN114102997A (en) | 2020-09-01 | 2020-09-01 | Injection molding machine nozzle of leak protection material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114102997A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4338924A1 (en) * | 2022-09-14 | 2024-03-20 | The Japan Steel Works, Ltd. | Shut-off nozzle, injection device, and injection molding machine |
-
2020
- 2020-09-01 CN CN202010905277.4A patent/CN114102997A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4338924A1 (en) * | 2022-09-14 | 2024-03-20 | The Japan Steel Works, Ltd. | Shut-off nozzle, injection device, and injection molding machine |
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