CN209869327U - SCF flow controller - Google Patents
SCF flow controller Download PDFInfo
- Publication number
- CN209869327U CN209869327U CN201920664834.0U CN201920664834U CN209869327U CN 209869327 U CN209869327 U CN 209869327U CN 201920664834 U CN201920664834 U CN 201920664834U CN 209869327 U CN209869327 U CN 209869327U
- Authority
- CN
- China
- Prior art keywords
- gear
- flow controller
- driven gear
- working cavity
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a SCF flow controller, which comprises a controller main body, wherein the controller main body is provided with a working chamber, and the side wall of the working chamber is connected with an air inlet electromagnetic valve and an air outlet electromagnetic valve; the piston head is movably arranged in the working cavity, the piston head is acted by the driving mechanism so that the space volume of the working cavity can be changed, and one end of the working cavity is provided with the air pressure sensor. The utility model provides a SCF flow controller, which has simple structure and low manufacturing cost; more accurate metering and control can be achieved.
Description
Technical Field
The utility model relates to a SCF flow controller.
Background
The micro-foaming injection molding process is an innovative precise injection molding technology, breaks through a plurality of limitations of the traditional injection molding, can obviously reduce the weight of a finished piece, shortens the molding period, and greatly improves the buckling deformation and the dimensional stability of the finished piece. The micro-foaming injection molding process has great advantages in producing precision products with high quality requirements. In the field of injection molding, the MuCell microcellular foam molding process of Trexel company is particularly prominent, and is one of the most rapidly developed and widely applied molding technologies in the precision molding technology.
In the micro-foaming injection molding process, a certain amount of supercritical fluid needs to be injected. In the prior art, the injection of supercritical fluid is realized by controlling a quantitative pump or a mass flow meter.
However, the conventional fixed displacement pump has a complicated structure, which results in an excessively high manufacturing cost. And, because of the complicated structure, the precision and the control ability are also lowered.
SUMMERY OF THE UTILITY MODEL
The utility model provides a SCF flow controller, aiming at the defects in the prior art, and having simple structure and low manufacturing cost; more accurate metering and control can be achieved.
In order to solve the technical problem, the utility model discloses a following technical scheme can solve: a SCF flow controller comprises a controller main body, wherein the controller main body is provided with a working cavity, and the side wall of the working cavity is connected with an air inlet electromagnetic valve and an air outlet electromagnetic valve; the piston head is movably arranged in the working cavity, the piston head is acted by the driving mechanism so that the space volume of the working cavity can be changed, and one end of the working cavity is provided with the air pressure sensor.
In the above technical solution, preferably, the driving mechanism includes a stepping motor, a driving gear is disposed at an end of the stepping motor, the driving gear is engaged with a driven gear, and the driving gear and the driven gear are restricted from linear displacement; the axis of the driven gear is in threaded connection with a piston rod, and the end of the piston rod is provided with the piston head; after the stepping motor works, the driven gear is driven to rotate by driving the driving gear, and the driven gear drives the piston rod to do linear motion.
Among the above-mentioned technical scheme, preferably, controller main part front end is provided with the end cover, the end cover with be provided with the gear chamber between the controller main part, gear chamber internal gearing is provided with drive gear with driven gear, just drive gear with vertical range from top to bottom of driven gear.
In the above technical solution, preferably, a clamping seat for fixedly mounting the stepping motor is arranged at the top of the controller main body.
In the above technical solution, preferably, the side wall of the piston head is provided with a plurality of sealing rings.
In the above technical solution, preferably, the end cover is provided with a through hole, and the through hole can be passed through by the piston rod.
The utility model provides a SCF flow controller, which has simple structure and low manufacturing cost; more accurate metering and control can be achieved.
Drawings
Fig. 1 is a front view of the structure of the present invention.
Fig. 2 is a schematic sectional view of the structure of the present invention.
Detailed Description
The invention will be described in further detail with reference to the following detailed description and accompanying drawings: as shown in fig. 1 to 2, a SCF flow controller comprises a controller body 4, wherein the controller body 4 is provided with a working chamber 41, and a side wall of the working chamber 41 is connected with an air inlet solenoid valve 1 and an air outlet solenoid valve 2; a piston head 51 is movably arranged in the working chamber 41, the piston head 51 is acted by a driving mechanism so as to change the space volume of the working chamber 41, and an air pressure sensor 42 is arranged at one end of the working chamber 41.
The driving mechanism comprises a stepping motor 31, a driving gear 32 is arranged at the end part of the stepping motor 31, a driven gear 33 is connected with the driving gear 32 in a meshing way, and the driving gear 32 and the driven gear 33 are limited in linear displacement; a piston rod 5 is connected to the axis of the driven gear 33 through a thread, and the piston head 51 is arranged at the end part of the piston rod 5; after the stepping motor 31 works, the driving gear 32 is driven to rotate to drive the driven gear 33 to rotate, and the driven gear 33 drives the piston rod 5 to do linear motion.
The front end of the controller body 4 is provided with an end cover 3, the end cover 3 and a gear cavity is arranged between the controller body 4, the gear cavity is internally meshed with the driving gear 32 and the driven gear 33, and the driving gear 32 and the driven gear 33 are vertically arranged from top to bottom.
The top of the controller body 4 is provided with a clamping seat for fixedly mounting the stepping motor 31.
The side wall of the piston head 51 is provided with a plurality of sealing rings.
The end cover 3 is provided with a through hole, and the through hole can be penetrated by the piston rod 5.
The utility model utilizes the compressible characteristic of the supercritical fluid. Under isothermal conditions, the volume is constant and the pressure and supercritical fluid density are linear. When the density and the volume are known, the supercritical fluid is injected into the cavity of the controller, and the discharge mass of the supercritical fluid from the controller can be calculated by measuring the pressure after inflation and the pressure after deflation. The SCF flow controller can greatly simplify the structure, reduce the manufacturing cost and realize more accurate metering and control.
The device also comprises a PLC module which can control the work of the air inlet electromagnetic valve 1 and the air outlet electromagnetic valve 2 and can receive and process signals transmitted by the air pressure sensor. The SCF flow controller cooperates with the PLC to complete the whole action process.
When the device is in an initial state, the supercritical fluid is connected into the air inlet electromagnetic valve, the controller and the electric system are in a working state, and the air inflation quantity is set.
The inflation process of the device is as follows: according to the operation program of the micro-foaming injection molding device, when supercritical fluid needs to be injected, the controller opens the air inlet electromagnetic valve, the supercritical fluid enters the cavity of the controller, meanwhile, the pressure sensor measures the injection pressure, the PLC selects and records the maximum value, and then the air inlet electromagnetic valve is closed.
The inflation process of the device is as follows: after the air inlet electromagnetic valve is closed, the exhaust electromagnetic valve is opened, the supercritical fluid in the cavity of the controller is injected into the micro-foaming injection molding device, and meanwhile, the pressure sensor measures the pressure in the cavity of the controller. And when the pressure of the cavity of the controller is balanced with the pressure in the micro-foaming injection molding device, the PLC records the pressure value at the moment.
The feedback process of the device is as follows: and the PLC calculates the actual injection amount of the supercritical fluid according to the pressure difference before and after the air exhaust of the controller. Comparing the set values and giving the injection quantity deviation. The adjustable piston rod is adjusted through the stepping motor, and the volume of the inner cavity of the controller is changed until the actual injection amount is matched with the set injection amount.
After working, the stepping motor of the device drives the driving gear 32 to rotate, thereby driving the driven gear 33 to rotate. The driven gear 33 is restricted in its displacement so that, after its rotation, the piston rod 5 is driven in a linear movement due to the threaded engagement.
Besides thread engagement, the connection relationship between the driven gear 33 and the piston rod 5 has other modes, and the connection relationship is within the protection scope of the scheme as long as the connection relationship can satisfy the requirement that the driven gear 33 rotates to drive the piston rod 5 to do linear motion. These are all simple replacement schemes based on the present scheme.
The utility model provides a SCF flow controller, which has simple structure and low manufacturing cost; more accurate metering and control can be achieved.
Claims (6)
1. A SCF flow controller, characterized by: the controller comprises a controller main body (4), wherein the controller main body (4) is provided with a working cavity (41), and the side wall of the working cavity (41) is connected with an air inlet electromagnetic valve (1) and an air outlet electromagnetic valve (2); a piston head (51) is movably arranged in the working cavity (41), the piston head (51) is acted by a driving mechanism so as to change the space volume of the working cavity (41), and an air pressure sensor (42) is arranged at one end of the working cavity (41).
2. A SCF flow controller according to claim 1, wherein: the driving mechanism comprises a stepping motor (31), a driving gear (32) is arranged at the end part of the stepping motor (31), a driven gear (33) is connected to the driving gear (32) in a meshing manner, and the driving gear (32) and the driven gear (33) are limited in linear displacement; a piston rod (5) is connected to the axis of the driven gear (33) in a threaded manner, and the end of the piston rod (5) is provided with the piston head (51); after the stepping motor (31) works, the driven gear (33) is driven to rotate by driving the driving gear (32), and the driven gear (33) drives the piston rod (5) to do linear motion.
3. A SCF flow controller according to claim 2, wherein: controller main part (4) front end is provided with end cover (3), end cover (3) with be provided with the gear chamber between controller main part (4), gear intracavity meshing is provided with drive gear (32) with driven gear (33), just drive gear (32) with vertical range about driven gear (33).
4. A SCF flow controller according to claim 3, wherein: the top of the controller main body (4) is provided with a clamping seat for fixedly mounting the stepping motor (31).
5. A SCF flow controller according to claim 1, wherein: the side wall of the piston head (51) is provided with a plurality of sealing rings.
6. A SCF flow controller according to claim 3, wherein: the end cover (3) is provided with a through hole, and the through hole can be penetrated by the piston rod (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920664834.0U CN209869327U (en) | 2019-05-10 | 2019-05-10 | SCF flow controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920664834.0U CN209869327U (en) | 2019-05-10 | 2019-05-10 | SCF flow controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209869327U true CN209869327U (en) | 2019-12-31 |
Family
ID=68964598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920664834.0U Active CN209869327U (en) | 2019-05-10 | 2019-05-10 | SCF flow controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209869327U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110001018A (en) * | 2019-05-10 | 2019-07-12 | 宁波佰氏微泡注塑科技有限公司 | A kind of SCF flow controller and control method |
-
2019
- 2019-05-10 CN CN201920664834.0U patent/CN209869327U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110001018A (en) * | 2019-05-10 | 2019-07-12 | 宁波佰氏微泡注塑科技有限公司 | A kind of SCF flow controller and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209869327U (en) | SCF flow controller | |
| CN106734493A (en) | A kind of middle-size and small-size internal high-pressure forming machine of bulging pressure fluctuation loading | |
| CN101870160B (en) | Pump-valve compound control hydraulic system for injection molding machine and control method thereof | |
| CN209164210U (en) | A kind of pressurized fuel tank device | |
| KR101744370B1 (en) | Clearance pocket for reciprocating compressor | |
| US6276911B1 (en) | Screw compressor | |
| CN202707394U (en) | Single connecting rod linkage double-cavity metering pump | |
| CN212131323U (en) | Electromagnetic valve | |
| CN101503998A (en) | Electrohydraulic integrating dual-displacement variable power control system | |
| CN201645777U (en) | Pump-valve composite control hydraulic system for injection molding machine | |
| CN114101621A (en) | Pressurization closed-loop control system of die casting machine | |
| CN103362878A (en) | Capacity-adjustable diaphragm-type pulsation absorbing energy accumulator | |
| CN110001018A (en) | A kind of SCF flow controller and control method | |
| CN201757051U (en) | Reciprocating type plunger accurate variable device | |
| CN211599384U (en) | Shock absorber with vehicle body height adjusting function | |
| CN207288526U (en) | A kind of more siphunculus formation systems | |
| CN111005971B (en) | Shock absorber with vehicle body height adjusting function and control method thereof | |
| CN201386711Y (en) | Flexible feedback digital liquid cylinder | |
| CN112963337A (en) | Output metering control method of motor-driven reciprocating pump | |
| CN202780390U (en) | Uniflow locking machine | |
| CN210396992U (en) | Non-pulsation metering pump | |
| CN110157877B (en) | Double-drive hole wall machining system and method | |
| CN114162368A (en) | Metering mechanism and metering method for cream filling | |
| CN219129195U (en) | Quantitative high-level dropwise adding tank | |
| CN217873145U (en) | Piston stroke control mechanism and variable pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |