CN113059761A - Mutually-stepped supercharging cylinder for hot runner system - Google Patents
Mutually-stepped supercharging cylinder for hot runner system Download PDFInfo
- Publication number
- CN113059761A CN113059761A CN202110506128.5A CN202110506128A CN113059761A CN 113059761 A CN113059761 A CN 113059761A CN 202110506128 A CN202110506128 A CN 202110506128A CN 113059761 A CN113059761 A CN 113059761A
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- piston rod
- cylinder body
- cylinder
- hot runner
- runner system
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- 238000007789 sealing Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000003754 machining Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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Classifications
-
- 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/28—Closure devices therefor
- B29C45/2806—Closure devices therefor consisting of needle valve systems
- B29C45/281—Drive means therefor
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
Abstract
The invention provides a mutual-pedaling type supercharging cylinder for a hot runner system, which comprises a first cylinder body, a second cylinder body, a first piston rod, a second piston rod and a cylinder body bottom cover, wherein the first cylinder body and the second cylinder body are arranged up and down; the second piston rod is positioned in the second cylinder body; the length of the first piston rod is greater than that of the second piston rod, the second piston rod is sleeved outside the first piston rod, and the first piston rod is connected with the second piston rod through an elastic component; one end of the first piston rod extends out from the first cylinder body through the cylinder body bottom cover; the first cylinder body is provided with a first air inlet; the second cylinder body is provided with a second air inlet. By adopting the technical scheme of the invention, the double-layer cylinder realizes stable pressure during production, simple structure, easy processing, convenient assembly and disassembly, high accuracy of the axial degree after assembly and greatly reduced assembly error.
Description
Technical Field
The invention relates to the technical field of cylinders, in particular to a mutual-pedal type supercharging cylinder for a hot runner system.
Background
The hot runner system is suitable for most plastic products, and particularly for engineering plastics with high viscosity and poor flowability, the hot runner system is adopted, so that the material loss is low, and the hot runner system is the best choice. The cylinder is one part of the hot runner system and forms the needle valve type hot runner system together with the needle valve type hot nozzle, the needle valve type flow distribution plate and the like. In operation, when the cylinder is used together with the time schedule controller, the front and back sequence of each glue inlet point can be controlled respectively so as to meet the molding requirement of plastic products. However, in the production injection molding process of the common cylinder, if the pressure is insufficient or unstable, the phenomena of needle clamping and the like are easily caused, so that the system is unstable during production, defective products are increased, and the production efficiency is reduced. The existing mutual-stepping type supercharging cylinder for the hot runner system has the defects that the cylinder sleeve is not easy to process, the positioning of a valve needle is not accurate, and the error is large.
Disclosure of Invention
Aiming at the technical problems, the invention discloses a mutual-pedal type supercharging cylinder for a hot runner system, which solves the problems of needle clamping, system instability and the like caused by insufficient pressure or unstable pressure in the production of a common cylinder, and has the advantages of convenient processing, high precision and small error.
In contrast, the technical scheme of the invention is as follows:
a mutual-pedaling type supercharging cylinder for a hot runner system comprises a first cylinder body, a second cylinder body, a first piston rod, a second piston rod and a cylinder body bottom cover, wherein the first cylinder body and the second cylinder body are arranged up and down;
the second piston rod is positioned in the second cylinder body; the length of the first piston rod is greater than that of the second piston rod, the second piston rod is sleeved outside the first piston rod, and the first piston rod is connected with the second piston rod through an elastic component; one end of the first piston rod extends out from the first cylinder body through the cylinder body bottom cover;
the first cylinder body is provided with a first air inlet; the second cylinder body is provided with a second air inlet.
According to the technical scheme, the two separated cylinder bodies are adopted, so that the machining precision is easier to control, the machining is convenient, and the installation and the disassembly are also convenient; and the auxiliary parts are reduced, so that the height control precision of the valve needle is greatly improved.
As a further improvement of the invention, the outer side wall of the second cylinder body is provided with a gasket groove, and the second air hole groove and the gasket groove are arranged along the axial direction.
As a further improvement of the invention, the gasket groove is positioned at one end close to the tail part of the second cylinder body.
As a further improvement of the invention, the cylinder bottom cover is provided with an air outlet hole.
As a further improvement of the invention, the number of the air outlet holes is not less than two, and the number of the first air inlet holes and the number of the second air inlet holes are not less than two.
As a further improvement of the invention, the outer side wall of the first cylinder body is provided with a first air inlet groove, and the first air inlet is positioned in the first air inlet groove; the lateral wall of second cylinder body is equipped with the second gas pocket groove, the second gas pocket is located the second gas pocket inslot.
As a further improvement of the present invention, the first cylinder and the second cylinder are provided with vent holes therein.
As a further improvement of the invention, the first piston rod is provided with a through hole from the top surface to the bottom surface.
As a further improvement of the invention, the elastic component is a clamp spring.
As a further improvement of the invention, the first piston rod is provided with a clamping groove, and the first piston rod is connected with the second piston rod through a clamping spring arranged in the clamping groove.
As a further improvement of the present invention, the sealing member is a gasket.
As a further improvement of the invention, the other end of the first piston rod is provided with a screw thread for connecting with the needle valve. The existing piston rod is connected with the needle valve through a gasket and a nut, the technical scheme adopts a thread structure, and the connection can be realized only by installing a headless screw. The mode error that the tradition adopted the gasket is great, influences the control accuracy to the needle valve, also can cause the height of gluing the mouth during production, and the thread structure of adopting this technical scheme, the precision is controlled more easily, simple to operate is swift moreover.
As a further improvement of the present invention, the first piston rod is provided with a first rubber ring groove, and the first piston rod is connected to the first cylinder body through a rubber ring arranged in the first rubber ring groove.
As a further improvement of the present invention, the second piston rod is provided with a second rubber ring groove, and the second piston rod is connected with the second cylinder body through a rubber ring arranged in the second rubber ring groove.
As a further improvement of the invention, the cylinder bottom cover is provided with a tooth hole.
As a further improvement of the invention, the inner wall of the cylinder bottom cover is provided with a groove, and a sealing ring is placed in the groove and is used for being connected with the first piston rod.
Compared with the prior art, the invention has the beneficial effects that:
by adopting the technical scheme of the invention, the double-layer air cylinder realizes stable pressure during production, ensures sufficient pressure, and has the advantages of simple structure, easy processing, convenient assembly and disassembly, high accuracy of the assembled shaft, greatly reduced assembly error, difficult damage of a sealing element and strong practicability.
Drawings
Fig. 1 is an exploded view of a mutually stepped supercharge cylinder for a hot runner system according to the present invention.
Fig. 2 is a schematic assembly structure of the mutually stepped supercharge cylinder for a hot runner system according to the present invention.
Fig. 3 is a schematic structural diagram of the first piston rod according to the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of the second piston rod according to the embodiment of the present invention.
Fig. 5 is a schematic structural view of a cylinder bottom cover according to an embodiment of the present invention.
The reference numerals include:
1-a first cylinder body, 2-a second cylinder body, 3-a first piston rod, 4-a second piston rod, 5-a cylinder body bottom cover, 6-a gasket, 7-a first air hole groove, 8-a first air inlet hole, 9-a second air hole groove, 10-a gasket groove, 11-a second air inlet hole, 12-a clamping groove, 13-a first rubber ring groove, 14-a second rubber ring groove, 15-a screw thread, 16-an air outlet hole, 17-a tooth hole and 18-a groove.
Detailed Description
Preferred embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 to 5, the mutually stepping type supercharging cylinder for the hot runner system comprises a first cylinder body 1, a second cylinder body 2, a first piston rod 3, a second piston rod 4 and a cylinder body bottom cover 5, wherein the first cylinder body 1 and the second cylinder body 2 are arranged up and down, a gasket 6 is arranged between the first cylinder body 1 and the second cylinder body 2 for sealing connection, and the cylinder body bottom cover 5 is connected with an end of the first cylinder body 1.
The second piston rod 4 is positioned in the second cylinder body 2; the length of the first piston rod 3 is greater than that of the second piston rod 4, the second piston rod 4 is sleeved outside the first piston rod 3, and the first piston rod 3 is connected with the second piston rod 4 through a clamp spring; one end of the first piston rod 3 extends out from the first cylinder body 1 through the cylinder body bottom cover 5; the first cylinder body 1 is provided with a first air inlet 8 communicated with the interior of the first cylinder body 1; the second cylinder body 2 is provided with a second air inlet hole 11 communicated with the inside of the second cylinder body 2. The cylinder body bottom cover 5 is provided with an air outlet 16. The outer side wall of the first cylinder body 1 is provided with a first air inlet groove 7, and the first air inlet 8 is positioned in the first air inlet groove 7; the outer side wall of the second cylinder body 2 is provided with a second air hole groove 9 and a gasket groove 10, and the second air inlet hole 11 is positioned in the second air hole groove 9. The second air hole groove 9 and the gasket groove 10 are arranged along the axial direction. The gasket 6 is arranged in the gasket groove 10, so that the good air sealing effect is achieved, and air pressure instability, production instability and the like caused by air blow-by of an air cylinder are prevented. The gasket groove 10 is located at one end close to the tail of the second cylinder body 2.
The first piston rod 3 is provided with a clamping groove 12, the clamping spring is arranged in the clamping groove 12, and the first piston rod 3 is connected with the second piston rod 4 through the clamping spring arranged in the clamping groove 12.
The first piston rod 3 is provided with a first rubber ring groove 13, and the first piston rod 3 is connected with the first cylinder body 1 through a rubber ring arranged in the first rubber ring groove 13. The second piston rod 4 is provided with a second rubber ring groove 14, and the second piston rod 4 is connected with the second cylinder body 2 through a rubber ring arranged in the second rubber ring groove 14. One end of the first piston rod 3 is provided with a thread 15 for connecting with a needle valve.
Preferably, the number of the air outlet holes 16 is not less than two, and the number of the first air inlet holes 8 and the number of the second air inlet holes 11 are not less than two.
Preferably, the first cylinder 1 and the second cylinder 2 are provided with vent holes therein. The first piston rod 3 is provided with a through hole from the top surface to the bottom surface.
Preferably, the cylinder bottom cover 5 is provided with a tooth hole 17, so that the cylinder bottom cover can be simply and conveniently taken out of the mold.
Preferably, the inner wall of the cylinder bottom cover 5 is provided with a groove 18, and a sealing ring is placed in the groove 18 and is used for being connected with the first piston rod 3.
By adopting the supercharging cylinder of the embodiment, the piston rod can freely move in the cylinder body. The following description is made with reference to specific examples.
The pressure of 6kg enters the air hole of the mold through the electromagnetic valve, and then enters the two air inlet holes (simultaneously air inlet) above the first cylinder body 1 and the second cylinder body 2 to push the first piston rod 3 to move downwards to drive the valve needle to the mold sealing opening, and meanwhile, the air below the front end of the cylinder body is discharged out of the cylinder through the cylinder body bottom cover 5 and the air below the middle end of the cylinder body together, and then is discharged through the mold air outlet 16. In the process, the area of the common cylinder when the thrust advances is 10.6 cm2The area when returning is: 20.2cm, forward thrust: 63.3, return force: 68.6 kgf. The area of the cylinder of the present embodiment when the thrust advances is: 19.3 cm2The area at return is: 20.2cm, forward thrust: 118.3, return force: 123.7 kgf. The data thus enable a double layer, mutually treaded cylinder to be twice as powerful as a conventional cylinder.
In addition, the two separated cylinder bodies are adopted in the embodiment, the machining precision is easier to control, the machining is convenient, and the installation and the disassembly are also convenient; and the auxiliary parts are reduced, so that the height control precision of the valve needle is greatly improved. Through comparison, the height error of the valve needle can be reduced to 3-5 threads from the original 10-15 threads, the precision is improved by three times, and the valve needle is more accurately positioned.
The above-mentioned embodiments are preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and the equivalent changes in shape and structure according to the present invention are within the protection scope of the present invention.
Claims (10)
1. A mutually step on formula supercharge cylinder for hot runner system which characterized in that: the piston type hydraulic cylinder comprises a first cylinder body, a second cylinder body, a first piston rod, a second piston rod and a cylinder body bottom cover, wherein the first cylinder body and the second cylinder body are arranged up and down;
the second piston rod is positioned in the second cylinder body; the length of the first piston rod is greater than that of the second piston rod, the second piston rod is sleeved outside the first piston rod, and the first piston rod is connected with the second piston rod through an elastic component; one end of the first piston rod extends out from the first cylinder body through the cylinder body bottom cover;
the first cylinder body is provided with a first air inlet; the second cylinder body is provided with a second air inlet.
2. A mutually stepped supercharge cylinder for a hot runner system according to claim 1, wherein: the outer side wall of the second cylinder body is provided with a gasket groove, and the second air hole groove and the gasket groove are axially arranged.
3. A mutually stepped supercharge cylinder for a hot runner system according to claim 2, wherein: the gasket groove is positioned at one end close to the tail part of the second cylinder body.
4. A mutually stepped supercharge cylinder for a hot runner system according to claim 2, wherein: the cylinder body bottom cover is provided with an air outlet.
5. A mutually stepped supercharge cylinder for a hot runner system according to claim 2, wherein: the number of the air outlets is not less than two, and the number of the first air inlets and the number of the second air inlets are not less than two.
6. A mutually stepped supercharge cylinder for a hot runner system according to claim 5, wherein: the outer side wall of the first cylinder body is provided with a first air inlet groove, and the first air inlet is positioned in the first air inlet groove; and a second air hole groove is formed in the outer side wall of the second cylinder body, and the second air inlet hole is positioned in the second air hole groove.
7. A mutually stepped supercharge cylinder for a hot runner system according to claim 2, wherein: the elastic component is a clamp spring.
8. A mutually stepped supercharge cylinder for a hot runner system according to claim 7, wherein: the first piston rod is provided with a clamping groove and is connected with the second piston rod through a clamping spring arranged in the clamping groove.
9. The mutually stepped supercharge cylinder for a hot runner system according to any one of claims 1 to 8, wherein: the sealing member is a gasket.
10. A mutually stepped supercharge cylinder for a hot runner system according to claim 9, wherein: the first piston rod is provided with screw teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110506128.5A CN113059761A (en) | 2021-05-10 | 2021-05-10 | Mutually-stepped supercharging cylinder for hot runner system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110506128.5A CN113059761A (en) | 2021-05-10 | 2021-05-10 | Mutually-stepped supercharging cylinder for hot runner system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113059761A true CN113059761A (en) | 2021-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110506128.5A Pending CN113059761A (en) | 2021-05-10 | 2021-05-10 | Mutually-stepped supercharging cylinder for hot runner system |
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| Country | Link |
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| CN (1) | CN113059761A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203317693U (en) * | 2013-07-08 | 2013-12-04 | 深圳市志成金科技有限公司 | Mutually-pedaled pressurization air cylinder of hot runner system |
| CN109162982A (en) * | 2018-10-21 | 2019-01-08 | 佛山市工芯精密机械有限公司 | A kind of double acting cylinder body device of no piston |
| CN209483720U (en) * | 2019-01-18 | 2019-10-11 | 宁波市爱托普气动液压有限公司 | A kind of multipoint mode thin pressurizing cylinder |
| CN210889548U (en) * | 2019-11-29 | 2020-06-30 | 江苏凯捷机械制造有限公司 | Conveniently dismantle pin-connected panel hydro-cylinder that overhauls |
-
2021
- 2021-05-10 CN CN202110506128.5A patent/CN113059761A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203317693U (en) * | 2013-07-08 | 2013-12-04 | 深圳市志成金科技有限公司 | Mutually-pedaled pressurization air cylinder of hot runner system |
| CN109162982A (en) * | 2018-10-21 | 2019-01-08 | 佛山市工芯精密机械有限公司 | A kind of double acting cylinder body device of no piston |
| CN209483720U (en) * | 2019-01-18 | 2019-10-11 | 宁波市爱托普气动液压有限公司 | A kind of multipoint mode thin pressurizing cylinder |
| CN210889548U (en) * | 2019-11-29 | 2020-06-30 | 江苏凯捷机械制造有限公司 | Conveniently dismantle pin-connected panel hydro-cylinder that overhauls |
Non-Patent Citations (1)
| Title |
|---|
| 郭鸿震: "《真空系统设计与计算》", 30 November 1986, 冶金工业出版社 * |
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