CN118107121A - Rubber injection opening and closing nozzle capable of variable speed injection - Google Patents
Rubber injection opening and closing nozzle capable of variable speed injection Download PDFInfo
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- CN118107121A CN118107121A CN202410278723.1A CN202410278723A CN118107121A CN 118107121 A CN118107121 A CN 118107121A CN 202410278723 A CN202410278723 A CN 202410278723A CN 118107121 A CN118107121 A CN 118107121A
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- nozzle
- control rod
- speed control
- head
- speed
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- 238000002347 injection Methods 0.000 title claims abstract description 42
- 239000007924 injection Substances 0.000 title claims abstract description 42
- 239000003292 glue Substances 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000004513 sizing Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000010008 shearing Methods 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 3
- 239000004636 vulcanized rubber Substances 0.000 abstract description 2
- 238000001746 injection moulding Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
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Abstract
The invention discloses a variable-speed injection opening and closing nozzle, which comprises a nozzle charging barrel, wherein a linear stepping motor is fixedly arranged at the top end of the nozzle charging barrel, a built-in temperature control pipeline is arranged in the middle parts of the nozzle charging barrel and a charging barrel shell, the built-in temperature control pipeline is communicated with an oil inlet and an oil outlet at the upper part of the nozzle charging barrel, a glue flowing channel is arranged in the nozzle charging barrel and communicated with a glue inlet, a speed control rod is arranged in the glue flowing channel, and the lower part of the nozzle charging barrel is connected with a nozzle head. The tail of the speed control rod is connected with a linear stepping motor nut and can move back and forth precisely along with the rotation of the motor, the speed control rod head is provided with a conical part, a variable gap channel is formed by the speed control rod head and a conical runner in the nozzle head, the top end of the speed control rod head is a flat head, and vulcanized rubber and sealed melt rubber can be ejected. The nozzle head is provided with an opening and closing part, the nozzle head is closed through a sealing ring on the connecting body during operation, the sealing ring is screwed up when the sizing material is blocked, and the nozzle head is opened and taken out. The invention changes the injection speed by moving the speed control rod, realizes stepless speed change and solves the problem of unstable injection speed.
Description
Technical Field
The invention belongs to the technical field of injection molding devices, and particularly relates to a rubber injection opening and closing nozzle capable of variable-speed injection.
Background
The injection molding is a process of obtaining products by cooling rubber melted by an injection molding machine under the action of the thrust of a speed control rod or a screw, and the molding method is widely applied to various fields of national defense industry, aviation, traffic, electric, mechanical, building, agriculture, religion, sanitation, daily necessities and the like. Among these, injection nozzles are key components in injection molding machines that function to inject a rubber melt into a mold cavity.
Chinese patent CN200920102619.8 relates to a rubber injection molding machine, which is suitable for pressing rubber products of various types of rubber materials, and belongs to the technical field of plastic extrusion and molding equipment; the structure comprises a frame, an injection device is arranged on the frame, and the structure is characterized in that: the injection device is fixed on an injection sliding table capable of moving along the longitudinal direction of the frame, a mold clamping device is arranged in front of an injection nozzle of the injection device, the mold clamping device comprises a front template fixed relative to the frame, and a feed inlet capable of being tightly sealed with the injection nozzle of the injection device is formed in the front template; the utility model has simple structure, accurate injection quantity, precise matching of the screw and the machine barrel, no need of accumulating sizing material at the front end of the screw during working, plasticizing and injecting the sizing material into the mold cavity, and simultaneously realizing automatic control of the vulcanizing temperature and the residence time of the sizing material in the mold cavity, thereby not only having small equipment investment and low energy consumption, but also greatly improving the production efficiency, ensuring stable product quality and high yield, and being suitable for the production of sizing material products with different viscosities. However, the existing injection nozzle still has defects in self structure and use performance, so that the injection speed is unstable, and the quality of a formed product is further affected; the disadvantage is that for a single nozzle, the viscous shear of the rubber generates heat during the flow in the nozzle, the temperature increases, and thus the viscosity decreases, and the injection speed becomes fast; for multiple nozzles, even with perfectly symmetrical flow paths, there may be a difference in the velocity of the gum material outlet from nozzle to nozzle. Meanwhile, when the vulcanization is finished, the boundary point of the vulcanized rubber and the unvulcanized rubber is arranged in a nozzle runner, the nozzle runner consists of a cylindrical section and a conical section, and when the rubber in the cylindrical section is in a vulcanized state, if the rubber in the conical section is vulcanized, the material head is difficult to pull out, and the nozzle is required to be disassembled to be dredged.
Disclosure of Invention
In order to overcome the above-mentioned drawbacks, an object of the present invention is to provide an injection opening and closing nozzle structure capable of controlling a flow rate of a rubber fluid in real time.
The invention is realized by adopting the following technical scheme:
a variable speed injection rubber injection on-off nozzle comprising:
The shell 21 of the feed cylinder is provided with a glue inlet 27, an oil inlet 24 and an oil outlet 25, and the inner wall of the shell body 212 and the outer wall of the nozzle feed cylinder 22 form a temperature control pipeline 26. The speed control rod 31 is positioned in the glue flowing channel 28 of the nozzle charging barrel 22, the upper part of the speed control rod is connected with the linear stepping motor 11 through the motor nut 13, and the glue sealing pressing block 23 is used for fixing the positions of the charging barrel shell 21 and the nozzle charging barrel 22 and preventing glue from flowing backwards.
The nozzle 41 is divided into a nozzle fixing portion 411 and a nozzle opening and closing portion 412, and a connector 51 for detachably connecting the entire nozzle 41 to the end of the cartridge housing 21, so that the speed control rod 31 of the nozzle cartridge 22 is engaged with the nozzle 41 in a relative position, the upper portion thereof is screwed with the inner wall of the cartridge housing 21, and the lower portion thereof is screwed with the seal ring 52 for positive pressure of the nozzle pressing ring 415.
The technical scheme of the invention has at least the following advantages and beneficial effects:
(1) The internal speed control rod is controlled by the motor to axially move, a gap with changeable size is formed between the top end of the internal speed control rod and the inner cavity of the nozzle, the gap is reduced, the speed is increased, and the injection speed is changed by moving the speed control rod, so that stepless speed change is realized.
(2) The position of the speed control rod in the invention is different, and the volume of the nozzle is changed. For an asymmetric flow channel, the flow channel thickness is generally changed to ensure that the outlet speeds are the same, and the invention can ensure that different outlet speeds are the same by changing the volume of the nozzle.
(3) The invention has a temperature control pipeline in the middle section of the nozzle, and ensures the temperature stability of rubber. The nozzle head can be opened and closed to prevent the blockage of the sizing material.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
Fig. 2 is an enlarged view of the upper and lower structures of the present invention;
fig. 2 (a) is an upper structure, and fig. 2 (b) is a lower structure;
FIG. 3 is a left side view of the cartridge housing of the present invention and a different oil routing pattern;
FIG. 3 (a) is a left side view of the cartridge housing, and FIG. 3 (b) is a different oil routing pattern;
FIG. 4 is a schematic drawing of a vertical temperature control circuit of the present invention;
FIG. 5 is an extraction diagram of a spiral temperature control circuit of the present invention;
FIG. 6 is a schematic view of a nozzle configuration of the present invention;
FIG. 7 is a schematic illustration of the process of operation of the present invention;
wherein, the spare part names that the reference numerals correspond to are as follows:
In the figure, 11. A linear stepper motor; 12. a motor lead screw; 13. a motor nut; 21. a cartridge housing; 211. a housing case; 212. a housing cylinder; 22. a nozzle cartridge; 23. sealing and briquetting; 24. an oil inlet; 25. an oil outlet; 26. a temperature control pipeline; 261. a vertical temperature control pipeline; 262. a spiral temperature control pipeline; 27. a glue inlet; 28. a glue flow channel; 31. a speed control rod; 311; a speed control rod head; 312; a speed control lever cone; a 41 nozzle; 411. a nozzle fixing portion; 412. a nozzle opening and closing part; 413. a nozzle opening; 414 nozzle cone; 415. a nozzle press ring; 51. a connecting body; 52. sealing rings; 61a glue inlet port; 62. an oil inlet channel interface; 63 outlet channel interface.
Detailed Description
The invention is described below with reference to the drawings and specific embodiments.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It will be apparent that the described embodiments are some, but not all, embodiments of the invention.
Thus, the following detailed description of the embodiments of the invention is not intended to limit the scope of the invention, as claimed, but is merely representative of some embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "back", and the like indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which the product of the present invention is conventionally placed when used. Such terminology is used for convenience in describing the invention and is not to be taken as an indication or suggestion that the device or element in question must have a particular orientation, be constructed and operated in a particular orientation and therefore should not be construed as limiting the invention.
It should also be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
As shown in fig. 1-7, the specific embodiments of the present invention are:
As a preferred embodiment of the present invention, as shown in fig. 1, a variable speed injection opening and closing nozzle structure of an injection molding machine of the present embodiment, namely a variable speed injection rubber injection opening and closing nozzle, includes:
The speed control rod 31 is positioned in the glue flowing channel 28, the upper part of the speed control rod is connected with the linear stepping motor 11 through the motor nut 13, and the motor screw 12 rotates to enable the motor nut 12 to axially move so as to drive the speed control rod 31 to move. The inside of the nozzle cone 414 is an lengthened conical surface, and the lower speed control rod cone 312 of the speed control rod 31 is in a conical shape to form a variable gap with the nozzle cone 414.
The speed control rod head 311 is flat head, can play the role of needle valve, prevents the glue outflow at the nozzle 413 before the injection begins, controls the speed control rod 31 to move upwards to enable the glue to flow out during the injection, and controls the speed control rod 3 to move up and down through the linear stepping motor 1 during the injection to realize the glue injection stepless speed change.
Further, the shell 21 of the feed cylinder is provided with a glue inlet 27, an oil inlet 24 and an oil outlet 25, and the inner wall of the shell cylinder 212 and the outer wall of the feed cylinder 22 of the nozzle form a temperature control pipeline 26 for controlling the temperature of the inner cavity of the nozzle by using a temperature-adaptive fluid;
there are two implementations, one is a vertical pipe 261 and one is a helical pipe 262.
As a preferred embodiment of the present invention, a sealing pressure block 23 is used to fix the position of the cartridge housing 21 and nozzle cartridge 22 and prevent backflow of the gum material.
The shell box 211 is externally connected with an oil inlet interface 62, an oil outlet interface 63 and a glue inlet interface 61; hot oil enters from the oil inlet 24 and flows out from the oil outlet 25 through the temperature control pipeline 26.
The oil inlet 24 and the oil outlet 25 are positioned on the same side as the glue inlet 27 and are connected with the oil path of the runner plate to form a common oil path, and the oil inlet 24 and the oil outlet 25 are positioned on the outer side or the opposite side of the glue inlet 27 and can be externally connected with an independent oil path.
Further, the connector 51 is used for detachably connecting the whole nozzle 41 to the end of the barrel housing 21, so that the speed control rod 31 of the nozzle barrel 22 is matched with the nozzle 41 relatively, the upper part of the connector is in threaded connection with the inner wall of the barrel housing 21, the nozzle pressing ring 415 is pressed tightly, and the lower part of the connector is in threaded connection with the seal ring 52.
The nozzle 41 comprises a nozzle fixing part 411 and a nozzle opening and closing part 412, and the sealing ring 52 is screwed up and opened for taking out when the sizing material is blocked.
Further, a temperature control pipeline 26 is arranged between the inner wall of the shell cylinder 212 and the outer wall of the nozzle cylinder 22, and is communicated with hot oil or water, so that the temperature of the sizing material is ensured, the hot oil or water flows in from the oil inlet 24 and flows out from the oil outlet 25, and the circulation is completed.
The nozzle 41 is composed of a nozzle fixing portion 411, a nozzle opening and closing portion 412, a nozzle opening 413, a nozzle cone 414, and a nozzle pressing ring 415.
As a preferred embodiment of the invention, the invention works as follows:
When the speed of the nozzle opening 413 is monitored to be lower than a set value, the speed control rod 31 is driven by the linear stepping motor 11 to move downwards, the gap of the glue flowing channel 28 is reduced, the pressure is increased, the shearing is enhanced, the temperature is increased, the viscosity is reduced, and the flowing speed of the glue is increased.
As another preferred embodiment of the present invention, the present invention works as follows:
The plurality of nozzles on the runner work, and the sizing material gets into the runner 28 through the glue inlet 27 with certain speed, guarantees temperature stability by control by temperature-sensing pipeline 26, and the position of speed control pole 31 is controlled by linear stepping motor 11, when monitoring nozzle opening 413 speed is faster than other export, through linear stepping motor 11 drive speed control pole 31 downwardly moving, runner 28 clearance reduces, nozzle opening 413 pressure increases, and the speed reduces, other export speeds increase.
The above embodiments are merely for illustrating the technical scheme of the present invention and not for limiting the same. Any modification or partial replacement without departing from the spirit of the invention shall be covered by the scope of the claims of the present invention.
Claims (5)
1. A variable speed injection rubber injection opening and closing nozzle, characterized in that:
Comprises a charging barrel shell (21), a glue inlet (27), an oil inlet (24) and an oil outlet (25) are arranged on the charging barrel shell, and a temperature control pipeline (26) is formed by the inner wall of a shell barrel (212) and the outer wall of a nozzle charging barrel (22);
The speed control rod (31) is positioned in the glue flowing channel (28) of the nozzle charging barrel (22), the upper part of the speed control rod is connected with the linear stepping motor (11) through the motor nut (13), and the glue sealing pressing block (23) is used for fixing the positions of the charging barrel shell (21) and the nozzle charging barrel (22) and preventing glue from flowing reversely;
the motor screw rod (12) rotates to enable the motor nut (12) to axially move and drive the speed control rod (31) to move; the inside of the nozzle cone (414) is an lengthened conical surface, and the lower speed control rod cone (312) of the speed control rod (31) is in a conical shape and forms a variable gap with the nozzle cone (414);
The nozzle (41) is divided into a nozzle fixing part (411) and a nozzle opening and closing part (412), a connector (51) is used for detachably connecting the whole nozzle (41) to the tail end of the feed cylinder shell (21) so that a speed control rod (31) of the nozzle feed cylinder (22) is matched with the nozzle (41) relatively, the upper part of the speed control rod is in threaded connection with the inner wall of the feed cylinder shell (21), and the lower part of the speed control rod is in threaded connection with the seal ring (52) for positive pressure of the nozzle pressing ring (415).
2. A variable speed injection rubber injection on-off nozzle as defined in claim 1, wherein:
The head of the speed control rod (31) is conical, the inner cavity of the head of the nozzle (41) is conical, the angle of the head of the nozzle is larger than that of the head of the speed control rod (31), and the speed control rod (31) can move up and down in the glue flowing channel (28) through the control of the linear stepping motor (1);
the speed control rod head (311) is flat head, can play the role of a needle valve, and the speed control rod head (311) prevents the glue from flowing out at the nozzle opening (413) before the injection starts, and controls the speed control rod (31) to move upwards to enable the glue to flow out.
3. A variable speed injection rubber injection on-off nozzle as defined in claim 2, wherein:
The temperature control pipeline (26) is arranged between the inner wall of the shell cylinder (212) and the outer wall of the nozzle cylinder (22), hot oil or water is introduced to ensure the temperature of the sizing material, and the hot oil or water flows in from the oil inlet (24) and flows out from the oil outlet (25) to complete the circulation.
4. A variable speed injection rubber injection on-off nozzle as defined in claim 3, wherein:
The nozzle (41) comprises a nozzle fixing part (411) and a nozzle opening and closing part (412), and the common nozzle function is realized by pressurizing the sealing ring (52) and the mould during normal injection, and the sealing ring (52) is screwed upwards when the sizing material is blocked, and the blocked sizing material is taken out after opening.
5. The application method of the screw plasticizing device with the non-return pressure maintaining device is characterized by comprising the following steps of:
When the speed of the nozzle opening (413) is monitored to be lower than a set value, the speed control rod (31) is driven to move downwards by the linear stepping motor (11), the gap of the glue flowing channel (28) is reduced, the pressure of the nozzle opening (413) is increased, the shearing is enhanced, the temperature is increased, the viscosity is reduced, and the flowing speed of the glue is accelerated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410278723.1A CN118107121A (en) | 2024-03-12 | 2024-03-12 | Rubber injection opening and closing nozzle capable of variable speed injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410278723.1A CN118107121A (en) | 2024-03-12 | 2024-03-12 | Rubber injection opening and closing nozzle capable of variable speed injection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118107121A true CN118107121A (en) | 2024-05-31 |
Family
ID=91216787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410278723.1A Pending CN118107121A (en) | 2024-03-12 | 2024-03-12 | Rubber injection opening and closing nozzle capable of variable speed injection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118107121A (en) |
-
2024
- 2024-03-12 CN CN202410278723.1A patent/CN118107121A/en active Pending
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