CN220075426U - Driving cylinder of hot runner valve needle - Google Patents
Driving cylinder of hot runner valve needle Download PDFInfo
- Publication number
- CN220075426U CN220075426U CN202321538215.XU CN202321538215U CN220075426U CN 220075426 U CN220075426 U CN 220075426U CN 202321538215 U CN202321538215 U CN 202321538215U CN 220075426 U CN220075426 U CN 220075426U
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- cylinder
- piston
- valve needle
- piston rod
- cylinder body
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- 238000005192 partition Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 35
- 230000001360 synchronised effect Effects 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 22
- 229920003023 plastic Polymers 0.000 abstract description 12
- 239000004033 plastic Substances 0.000 abstract description 12
- 238000000034 method Methods 0.000 description 5
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 108091092889 HOTTIP Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Abstract
The utility model relates to the technical field of driving cylinders, in particular to a driving cylinder of a hot runner valve needle, which comprises a cover plate, a supporting plate, a cylinder sleeve, a piston assembly and a valve needle, wherein the cover plate, the cylinder sleeve and the supporting plate jointly form a cylinder body of the driving cylinder; the piston assembly is connected inside the cylinder body and can slide inside the cylinder body, so that the valve needle is driven to axially move along the cylinder body; a cylinder partition plate is arranged in the cylinder body, the space in the cylinder body is divided into a first cylinder and a second cylinder by the cylinder partition plate, a piston assembly is provided with a piston rod, and a valve needle is fixedly connected to the piston rod; the first cylinder and/or the second cylinder drive the piston rod to move in the cylinder body, so that the valve needle is driven to move along the axial direction of the cylinder body. Finally, the driving cylinder of the hot runner valve needle is provided, so that the driving force of the cylinder can be changed in a state of not changing the cylinder from new, the driving cylinder is suitable for producing more types of plastic products, the flow of changing the cylinder is simplified, and the production time and the production cost are saved.
Description
Technical Field
The utility model relates to the technical field of driving cylinders, in particular to a driving cylinder of a hot runner valve needle.
Background
A hot runner (Hot Runner Systems) is a heating assembly system used in injection molds to inject melted plastic particles into the cavity of the mold. The hot runner mold is a brand new structure in which runners and runners of a conventional mold or a three-plate mold are heated, and the runners and runners do not need to be taken out during each molding.
The hot runner valve pin system is mainly used in the form of a hot runner valve pin type gate, in which a valve pin closes the gate under the control of an oil cylinder or a gas cylinder after the pressure maintaining of a die is finished. When the valve needle opens the gate again through the control of the oil cylinder or the air cylinder, the plastic enters the product cavity from the runner through the gate under the action of pressure, and the filling process of the mold cavity is carried out. Compared with the open type glue feeding, the valve pin type pouring gate can shorten the forming period.
Such a system opens or closes the gate by mechanical movement of the valve needle at predetermined times under the influence of a valve needle control device. This type of hot runner system has many advantages that are not available with hot tip and runner systems. If the gate opening and closing time can be controlled manually, the gate is smooth and flat, and the application technical field of the hot runner technology can be expanded.
In the prior art, in the use process of the existing hot runner valve needle of the die, the valve needle moves under the driving of the air cylinder, because the specification of the air cylinder is determined, when different control forces are needed, the adjustable parameters of the valve needle are too few, and when plastics with different properties are encountered, the air cylinder can only be replaced from a new one, so that the production cost is increased and the production time is wasted.
Therefore, how to provide a driving cylinder of a hot runner valve needle, so that the driving force of the cylinder can be changed under the condition that the cylinder is not replaced, and the driving cylinder is suitable for producing more types of plastic products and is a technical problem to be solved.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a technical scheme capable of solving the problems.
The utility model provides a driving cylinder of a hot runner valve needle, which comprises a cover plate, a support plate, a cylinder sleeve, a piston assembly movably connected inside the cylinder sleeve and a valve needle fixedly connected to the piston assembly, wherein one end of the cylinder sleeve is fixedly connected to the cover plate, the other end of the cylinder sleeve is fixedly connected to the support plate, and the cover plate, the cylinder sleeve and the support plate jointly form a cylinder body of the driving cylinder; the piston assembly is movably connected inside the cylinder body and can slide inside the cylinder body, so that the valve needle is driven to move for a certain distance along the axial direction of the cylinder body; the cylinder body is internally provided with a cylinder partition board, the space inside the cylinder body is divided into a first cylinder and a second cylinder by the cylinder partition board, the piston assembly is provided with a piston rod, and the valve needle is fixedly connected to the piston rod; the first cylinder and/or the second cylinder drive the piston rod to move in the cylinder body, so that the valve needle is driven to move along the axial direction of the cylinder body.
As a further scheme of the utility model: the piston assembly is provided with a first piston, the first piston is fixedly connected to the piston rod, and the first piston is arranged in the first cylinder, so that the first cylinder drives the piston rod to move in a telescopic way in the cylinder body and drives the piston rod to move synchronously with the valve needle.
As a further scheme of the utility model: the piston assembly is provided with a second piston, the second piston is fixedly connected to the piston rod, and the second piston is arranged in a second cylinder, so that the second cylinder drives the piston rod to move in a telescopic way in the cylinder body and drives the piston rod to move synchronously with the valve needle.
As a further scheme of the utility model: the piston assembly is provided with a fastener, a through hole is formed in the piston rod, and the valve needle is fixedly connected in the through hole of the piston rod through the fastener so as to move along with the piston rod.
As a further scheme of the utility model: the piston assembly is provided with a tight spring and a machine rice screw, the tight spring is sleeved on the valve needle, one end of the tight spring is abutted on the piston rod, the other end of the tight spring is abutted on the fastening piece, and the machine rice screw and the tight spring are matched with each other to fixedly connect the fastening piece in the through hole of the piston rod.
As a further scheme of the utility model: the cylinder body is internally provided with a first sealing ring, and the first sealing ring is respectively arranged at the contact position of the cover plate, the support plate and the cylinder partition plate with the piston rod, so that sealing connection is formed between the piston rod and the cylinder body.
As a further scheme of the utility model: the cylinder body is internally provided with a second sealing ring which is arranged at the contact position of the first piston and the cylinder sleeve, so that sealing connection is formed between the first piston and the cylinder sleeve.
As a further scheme of the utility model: a third sealing ring is arranged in the cylinder body and is arranged at the contact part of the second piston and the piston rod, so that sealing connection is formed between the second piston and the piston rod; the cylinder body is internally provided with a second sealing ring which is arranged at the contact position of the second piston and the cylinder sleeve, so that sealing connection is formed between the second piston and the cylinder sleeve.
As a further scheme of the utility model: the cylinder body is internally provided with a limiting snap ring which is clamped on the sealing rod and used for fixedly connecting the second piston on the piston rod.
Compared with the prior art, the utility model has the beneficial effects that:
1. the cylinder partition plate is arranged in the cylinder sleeve of the cylinder, so that the driving cylinder is divided into two parts, and two corresponding pistons are arranged, so that the valve needle can be driven in various combination modes.
2. The first cylinder can be operated to drive the valve needle, the second cylinder can be operated to drive the valve needle, and the first cylinder and the second cylinder can be operated simultaneously, so that the valve needle can be driven simultaneously, and the production can be carried out by being matched with a plurality of different plastic products.
3. And sealing rings are arranged on multiple parts, so that the air tightness of the driving cylinder is enhanced, and the running performance of the driving cylinder is improved.
Therefore, after the improvement, the utility model can provide the driving cylinder of the hot runner valve needle, so that the driving force of the cylinder can be changed under the condition that the cylinder is not replaced, thereby being applicable to the production of more types of plastic products, simplifying the process of replacing the cylinder, and saving the production time and the production cost.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of the present utility model;
FIG. 2 is a schematic cross-sectional view of the valve needle of the present utility model moving downward;
FIG. 3 is a schematic view of the structure of the limit snap ring of the present utility model;
FIG. 4 is a schematic cross-sectional view of the valve needle of the present utility model;
FIG. 5 is a schematic view of the first and second pistons of the present utility model;
fig. 6 is a schematic structural view of the piston assembly of the present utility model.
Reference numerals and names in the drawings are as follows:
a 10-cylinder; 11 cover plates; a 12 support plate; 13 a first port; 14 a second port; 15 a third port; 16 fourth gas ports; 20 cylinder sleeves; a 21 cylinder separator; 22 first cylinders; 23 a second cylinder; a 30 piston assembly; 31 piston rod; 32 through holes; 33 fasteners; 34 machine meter screws; 35 abutting against a spring; a first piston 36; a second piston 37; 41 a first sealing ring; 42 a second seal ring; 43 a third seal ring; 44 limit snap rings; 50 valve needle.
Detailed Description
The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 6, in an embodiment of the present utility model, a driving cylinder for a hot runner valve needle includes a cover plate 11, a support plate 12, a cylinder liner 20, a piston assembly 30 movably connected inside the cylinder liner 20, and a valve needle 50 fixedly connected to the piston assembly 30, wherein one end of the cylinder liner 20 is fixedly connected to the cover plate 11, the other end of the cylinder liner 20 is fixedly connected to the support plate 12, and the cover plate 11, the cylinder liner 20 and the support plate 12 together form a cylinder body 10 of the driving cylinder; the piston assembly 30 is movably connected inside the cylinder 10 and can slide inside the cylinder 10, so as to drive the valve needle 50 to move for a certain distance along the axial direction of the cylinder 10; a cylinder partition plate 21 is arranged in the cylinder body 10, the cylinder partition plate 21 divides the space inside the cylinder body 10 into a first cylinder 22 and a second cylinder 23, a piston assembly 30 is provided with a piston rod 31, and the valve needle 50 is fixedly connected to the piston rod 31; the first cylinder 22 and/or the second cylinder 23 drive the piston rod 31 to move in the cylinder 10, so as to drive the valve needle 50 to move along the axial direction of the cylinder 10.
In particular, in general, a hot runner valve pin system may be configured with only one mold, but more often with multiple molds, and may be configured to newly manufacture new molds as desired. But also in new production, there is a need to use different plastics for production injection moulding. The different plastics have different opening and closing pressures on the needle 50 during injection, and thus sometimes need to be adjusted from a new replacement cylinder. The replacement of the cylinder from the new cylinder is relatively troublesome, the production of the production line is also influenced, and the production progress is delayed. Therefore, the present utility model is provided with a new cylinder partition 21 on the basis of the driving cylinder of the conventional hot runner valve needle, thereby dividing the space in the cylinder body 10 into the first cylinder 22 and the second cylinder 23, and thus the first piston 36 and the second piston 37 can be provided, so that the driving force of the driving cylinder to the valve needle 50 can be more adjusted. For example, the first cylinder 22 can be operated to drive the valve needle 50, the second cylinder 23 can be operated to drive the valve needle 50, and the first cylinder 22 and the second cylinder 23 can be operated simultaneously to drive the valve needle 50 simultaneously, so that the plastic product can be produced by matching with a plurality of different plastic products. The method improves the expandability of production, simplifies the process of replacing the air cylinder, saves the production time and the production cost, and improves the production efficiency. Moreover, by arranging the first cylinder 22 and the second cylinder 23, the overall cylinder driving force of the driving cylinder is larger, so that a cylinder with a smaller relative diameter can be used for replacing a large cylinder to drive the valve needle of the hot runner, and the first cylinder 22 and the second cylinder 23 can be used for simultaneously driving the valve needle 50, thereby avoiding the valve needle 50 from being blocked; the pushing force can be further increased, and meanwhile, the size of the die blank can be reduced.
As shown in fig. 3 and 5, the piston assembly 30 is preferably provided with a first piston 36, the first piston 36 is fixedly connected to the piston rod 31, and the first piston 36 is disposed in the first cylinder 22, so that the first cylinder 22 drives the piston rod 31 to perform telescopic movement in the cylinder 10 and synchronously move with the valve needle 50. The piston assembly 30 is provided with a second piston 37, the second piston 37 is fixedly connected to the piston rod 31, and the second piston 37 is arranged in the second cylinder 23, so that the second cylinder 23 drives the piston rod 31 and the valve needle 50 to move synchronously and telescopically in the cylinder body 10.
Specifically, by providing the corresponding first piston 36 and second piston 37 in the first cylinder 22 and second cylinder 23, respectively, the first cylinder 22 and second cylinder 23 can each perform a driving action on the valve needle 50. The piston rod 31 can also be driven simultaneously to drive the valve needle 50 to move.
As shown in fig. 2 and 3, preferably, the piston assembly 30 is provided with a fastener 33, the piston rod 31 is provided with a through hole 32 therein, and the needle 50 is fixedly connected in the through hole 32 of the piston rod 31 by the fastener 33 so as to follow the movement of the piston rod 31. The piston assembly 30 is provided with a propping spring 35 and a machine meter screw 34, the propping spring 35 is sleeved on the valve needle 50, one end of the propping spring 35 is propped against the piston rod 31, the other end of the propping spring 35 is propped against the fastening piece 33, and the machine meter screw 34 and the propping spring 35 are matched with each other to fixedly connect the fastening piece 33 in the through hole 32 of the piston rod 31.
In particular, in order to better secure the valve needle 50 on the piston rod 31, respective fasteners 33, abutment springs 35 and machine screws 34 are provided. The abutment spring can better lock the fastener 33 in the piston rod 31, and is locked with a certain tension.
As shown in fig. 4, it is preferable that a first seal ring 41 is provided in the cylinder 10, and the first seal ring 41 is provided at a position where the cover plate 11, the support plate 12, and the cylinder partition 21 are in contact with the piston rod 31, respectively, so as to form a sealing connection to the contact between the piston rod 31 and the cylinder 10. A second sealing ring 42 is also arranged in the cylinder 10, said second sealing ring 42 being arranged at a position where the first piston 36 and the second piston 37 are in contact with the cylinder liner 20, respectively, so as to form a sealing connection for the contact between the pistons and the cylinder liner 20. A third sealing ring 43 is further arranged in the cylinder 10, and the third sealing ring 43 is arranged at a contact position of the second piston 37 and the piston rod 31, so that a sealing connection is formed between the second piston 37 and the piston rod 31.
Specifically, the sealing rings are all airtight sealing rings in the prior art, so that good air tightness is formed between the fixed part and the movable part in the driving cylinder, and the driving cylinder can operate better.
As shown in fig. 2 and 3, preferably, a limiting snap ring 44 is further disposed in the cylinder 10, and the limiting snap ring 44 is clamped on the sealing rod, so as to fixedly connect the second piston 37 to the piston rod 31.
Specifically, the snap ring is mainly used for facilitating the fixed connection of the second piston 37 to the piston rod 31, and for facilitating the assembly, the first piston 36 and the second piston 37 cannot be directly and fixedly connected to the piston rod 31, so that the second piston 37 is specifically configured to cooperate with a bump (not shown in the drawings) on the piston rod 31 through the limiting snap ring 44, thereby fixing the second piston 37.
When in use, the corresponding mould is firstly manufactured according to the production requirement, and then the hot runner valve needle and the driving cylinder are installed in the corresponding mould together.
Then, the air pipes (not shown) are respectively connected to the air charging port and the air discharging port on the cylinder body 10, specifically, the air pipes are respectively connected to the first air port 13, the second air port 14, the third air port 15 and the fourth air port 16. The air pipes are then connected to respective air pumps (not shown) which are also controlled by valve needle control means (not shown) to effect control of the drive cylinders, the first piston 36 and the second piston 37 being driven by high pressure air to drive the piston rod 31, while the valve needle 50 moves with the piston rod 31.
Therefore, after the improvement, the utility model can provide the driving cylinder of the hot runner valve needle, so that the driving force of the cylinder can be changed under the condition that the cylinder is not replaced, thereby being applicable to the production of more types of plastic products, simplifying the process of replacing the cylinder, and saving the production time and the production cost.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (9)
1. The utility model provides a drive cylinder of hot runner needle, includes apron (11), backup pad (12), cylinder liner (20), swing joint in the inside piston subassembly (30) of cylinder liner (20), and needle (50) of fixed connection on piston subassembly (30), the one end fixed connection of cylinder liner (20) is on apron (11), and the other end fixed connection of cylinder liner (20) is on backup pad (12), and apron (11), cylinder liner (20) and backup pad (12) constitute cylinder body (10) of drive cylinder jointly; the piston assembly (30) is movably connected inside the cylinder body (10) and can slide inside the cylinder body (10), so that the valve needle (50) is driven to move for a certain distance along the axial direction of the cylinder body (10); the cylinder is characterized in that a cylinder partition plate (21) is arranged in the cylinder body (10), the space inside the cylinder body (10) is divided into a first cylinder (22) and a second cylinder (23) by the cylinder partition plate (21), a piston assembly (30) is provided with a piston rod (31), and the valve needle (50) is fixedly connected to the piston rod (31); the first air cylinder (22) and/or the second air cylinder (23) drive the piston rod (31) to move in the cylinder body (10), so that the valve needle (50) is driven to move along the axial direction of the cylinder body (10).
2. A driving cylinder for a hot runner valve needle according to claim 1, characterized in that the piston assembly (30) is provided with a first piston (36), the first piston (36) being fixedly connected to the piston rod (31), the first piston (36) being arranged in the first cylinder (22) so as to be driven by the first cylinder (22) for telescopic movement in the cylinder (10) and for driving the piston rod (31) for synchronous movement with the valve needle (50).
3. A driving cylinder for a hot runner valve needle according to claim 1, characterized in that the piston assembly (30) is provided with a second piston (37), the second piston (37) being fixedly connected to the piston rod (31), the second piston (37) being arranged in the second cylinder (23) so as to be driven by the second cylinder (23) for telescopic movement in the cylinder body (10) and for driving the piston rod (31) for synchronous movement with the valve needle (50).
4. A driving cylinder for a hot runner valve needle according to claim 1, characterized in that the piston assembly (30) is provided with a fastener (33), a through hole (32) is provided in the piston rod (31), and the valve needle (50) is fixedly connected in the through hole (32) of the piston rod (31) by the fastener (33) so as to follow the movement of the piston rod (31).
5. The driving cylinder of a hot runner valve needle according to claim 4, wherein the piston assembly (30) is provided with a propping spring (35) and a machine screw (34), the propping spring (35) is sleeved on the valve needle (50), one end of the propping spring (35) is propped against the piston rod (31), the other end of the propping spring (35) is propped against the fastening piece (33), and the machine screw (34) and the propping spring (35) are matched with each other to fixedly connect the fastening piece (33) in the through hole (32) of the piston rod (31).
6. A driving cylinder for a hot runner valve needle according to claim 1, characterized in that a first sealing ring (41) is provided in the cylinder body (10), said first sealing ring (41) being provided at the position where the cover plate (11), the support plate (12) and the cylinder partition (21) are in contact with the piston rod (31), respectively, so that a sealing connection is formed for the contact between the piston rod (31) and the cylinder body (10).
7. A driving cylinder for a hot runner valve needle according to claim 2, characterized in that a second sealing ring (42) is further provided in the cylinder body (10), said second sealing ring (42) being arranged at a position where the first piston (36) is in contact with the cylinder liner (20), so that a sealing connection is formed for the contact between the first piston (36) and the cylinder liner (20).
8. A driving cylinder for a hot runner valve needle according to claim 3, characterized in that a third sealing ring (43) is further provided in the cylinder body (10), said third sealing ring (43) being provided at a location where the second piston (37) contacts the piston rod (31), so as to form a sealing connection for the contact between the second piston (37) and the piston rod (31); the cylinder body (10) is also internally provided with a second sealing ring (42), and the second sealing ring (42) is arranged at the contact position of the second piston (37) and the cylinder sleeve (20), so that sealing connection is formed between the second piston (37) and the cylinder sleeve (20).
9. A driving cylinder for a hot runner valve needle according to claim 3, characterized in that a limit snap ring (44) is further provided in the cylinder body (10), said limit snap ring (44) being clamped to the sealing rod for fixedly connecting the second piston (37) to the piston rod (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321538215.XU CN220075426U (en) | 2023-06-16 | 2023-06-16 | Driving cylinder of hot runner valve needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321538215.XU CN220075426U (en) | 2023-06-16 | 2023-06-16 | Driving cylinder of hot runner valve needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220075426U true CN220075426U (en) | 2023-11-24 |
Family
ID=88828626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321538215.XU Active CN220075426U (en) | 2023-06-16 | 2023-06-16 | Driving cylinder of hot runner valve needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220075426U (en) |
-
2023
- 2023-06-16 CN CN202321538215.XU patent/CN220075426U/en active Active
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