CN203438534U - Sheet extrusion machine provided with melt pressure control system - Google Patents
Sheet extrusion machine provided with melt pressure control system Download PDFInfo
- Publication number
- CN203438534U CN203438534U CN201320489363.7U CN201320489363U CN203438534U CN 203438534 U CN203438534 U CN 203438534U CN 201320489363 U CN201320489363 U CN 201320489363U CN 203438534 U CN203438534 U CN 203438534U
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- CN
- China
- Prior art keywords
- pressure
- melt pressure
- control system
- speed
- melt
- 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.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92019—Pressure
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92323—Location or phase of measurement
- B29C2948/92361—Extrusion unit
- B29C2948/9238—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/924—Barrel or housing
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92514—Pressure
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A sheet extrusion machine provided with a melt pressure control system comprises a machine body, a main machine, a metering pump, a filter screen and the melt pressure control system, wherein the main machine, the metering pump, the filter screen and the melt pressure control system are installed on the machine body respectively. The sheet extrusion machine is characterized in that the melt pressure control system comprises a pressure detection mechanism, a control device and a speed regulating mechanism, wherein the pressure detection mechanism is used for detecting the melt pressure in at least one position of the sheet extrusion machine and sending out pressure detection signals; the control device is used for receiving and processing the pressure detection signals and sending out speed-regulating control signals; and the speed regulating mechanism is used for receiving at least one speed-regulating control signal and controlling the rotating speed of a corresponding driving motor. Compared with the prior art, the sheet extrusion machine has the benefits as follows: the melt pressure control system can detect the melt pressure in real time in a better manner and regulate the melt pressure, so that the melt pressure is kept in a proper range all the time, and the quality of sheets produced by the sheet extrusion machine can be effectively ensured.
Description
Technical field
The utility model relates to a kind of sheet extruder, more specifically to a kind of sheet extruder with melt pressure control system.
Background technology
Sheet extruder is by die head extrusion sheet, and under conventional control operation, the master worker that need to start shooting is rich in abundant working experience and material properties is gone and found out what's going on down very much, just can make the plastic sheet of relatively good quality, loses time so very much and manpower.
This is because plastic melting changes into after melt, and the pressure of melt is difficult to control, and if the size of pressure changes, can cause bad impact to the sheet material quality of extruding.
utility model content
Technical problem to be solved in the utility model is for the unmanageable shortcoming of prior art melt pressure, a kind of sheet extruder with melt pressure control system is provided, this sheet extruder with melt pressure control system can better detect melt pressure in real time, and melt pressure is regulated, allow melt pressure remain in suitable scope.The technical scheme adopting is as follows:
A kind of sheet extruder with melt pressure control system, comprise fuselage, main frame, measuring pump, screen pack, melt pressure control system, described main frame, measuring pump, screen pack, melt pressure control system are arranged on respectively on fuselage, it is characterized in that: described melt pressure control system comprises
Pressure detection mechanism, the melt pressure at detection at least one place of sheet extruder, sends pressure detectable signal;
Control device, receives pressure detectable signal and processes, and sends speed regulating control signal;
Speed adjusting gear, receives at least one speed regulating control signal and controls the rotating speed of corresponding drive motors.
Scheme preferably, described pressure detection mechanism comprises the first pressure sensor, surveys the melt pressure before screen pack, sends the first pressure detectable signal.
More excellent scheme, described pressure detection mechanism also comprises the second pressure sensor, surveys the melt pressure between screen pack and measuring pump, sends the second pressure detectable signal.
More excellent scheme, described pressure detection mechanism also comprises the 3rd pressure sensor, surveys the melt pressure of metering pump discharge, sends the 3rd pressure detectable signal.
Scheme preferably, described control device comprises
Host computer, inputs various parameters by human-computer interaction interface;
PLC Programmable Logic Controller, receives various parameters and pressure detectable signal, after processing, exports at least one speed regulating control signal.
Scheme preferably, described speed adjusting gear comprises main frame frequency converter, described PLC Programmable Logic Controller output main frame speed-regulating signal, described main frame frequency converter Receiving Host speed-regulating signal, main control system electric machine rotation.
More excellent scheme, described speed adjusting gear comprises measuring pump frequency converter, described PLC Programmable Logic Controller output measuring pump speed-regulating signal, described measuring pump frequency converter receives measuring pump speed-regulating signal, controls motors of metering pumps and rotates.
The utility model beneficial effect is against existing technologies, because melt pressure control system can better detect melt pressure in real time, and melt pressure is regulated, therefore allow melt pressure remain in suitable scope, can effectively guarantee that sheet extruder produces the quality of sheet material.
accompanying drawing explanation
Fig. 1 is the structural representation of the utility model preferred embodiment;
Fig. 2 is the circuit block diagram of the melt pressure of preferred embodiment shown in Fig. 1 control system;
Fig. 3 be the control device of preferred embodiment shown in Fig. 1 and speed adjusting gear circuit theory diagrams.
the specific embodiment
As Figure 1-3, the sheet extruder with melt pressure control system in this preferred embodiment, comprise fuselage 1, main frame 2, measuring pump 3, screen pack 4, melt pressure control system, described main frame 2, measuring pump 3, screen pack 4, melt pressure control system are arranged on respectively on fuselage 1.
Described melt pressure control system comprises
Pressure detection mechanism, the melt pressure at detection sheet extruder three places, sends pressure detectable signal;
Control device, receives pressure detectable signal and processes, and sends speed regulating control signal;
Speed adjusting gear, receives two speed regulating control signals and controls the rotating speed of corresponding drive motors.
Described pressure detection mechanism comprises the first pressure sensor 5, surveys the melt pressure before screen pack 4, sends the first pressure detectable signal.
Described pressure detection mechanism also comprises the second pressure sensor 6, surveys the melt pressure between screen pack 4 and measuring pump 3, sends the second pressure detectable signal.
Described pressure detection mechanism also comprises the 3rd pressure sensor 7, surveys the melt pressure of measuring pump 3 outlets, sends the 3rd pressure detectable signal.
Described control device comprises
Host computer 8, inputs various parameters by human-computer interaction interface;
PLC Programmable Logic Controller 9, receives above-mentioned various parameter and pressure detectable signal, after processing, exports at least one speed regulating control signal.
Described speed adjusting gear comprises main frame frequency converter 10, described PLC Programmable Logic Controller output main frame speed-regulating signal, and described main frame frequency converter 10 Receiving Host speed-regulating signals, main control system motor 12 rotates.
Described speed adjusting gear comprises measuring pump frequency converter 11, described PLC Programmable Logic Controller output measuring pump speed-regulating signal, and described measuring pump frequency converter 11 receives measuring pump speed-regulating signal, controls motors of metering pumps 13 and rotates.
As shown in Figure 1, wherein the first pressure sensor 5 is mainly the pressure detecting before screen pack 4, and this pressure can be set warning function, when pressure detecting surpasses setting value, can realize sound or light warning, is mainly that prompting operation person need change screen pack 4.
The second pressure sensor 6 is mainly used for melt pressure PID and controls, and by the variation (PV value) of detected pressures value, controls the rotating speed of screw drive motor.
The 3rd 7 of pressure sensors, for showing the force value of real-time detection, play and observe the whether stable effect of the last melt pressure of output, can judge final melt situation.
As shown in Figure 3, the signal of the first pressure sensor 5/ second pressure sensor 6/ the 3rd pressure sensor 7 pressure sensors is all by the collection of PLC Programmable Logic Controller, and computing becomes the demonstration of melt pressure and converts the required reference data of melt pressure control system to.
The pressure of melt is by converting PLC desired data to, by PLC programming, add PID s operation control algorithm, introduce the Programmable communication technology, thereby change into flexibly the required frequency of frequency converter, the speed of quick adjustment main motor 12 and motors of metering pumps 13.
The PID s operation control link of PLC
Pid algorithm
In steady state operation, PID controller management output numerical value, is zero to mistake (e) is driven.Mistake is measured by the difference between setting value (required operating point) and process variable (practical operation point) and is determined.PID controls principle based on following formula, wherein will export the function that M (t) is expressed as proportional, integration item and differential term:
Wherein:
M (t) is as the loop output of the function of time
Dt loop gain
E loop mistake (difference between setting value and process variable)
The initial value of M initial loop output
When adopting closed loop PID control, when the detected next force value (PV value) of the second pressure sensor 6 is less than setting value (SP value), by output controlling value (CV value), control screw drive motor speed-raising (frequency converter timing), make the detected next force value of the second pressure sensor 6 raise and reach and setting value; Otherwise, when the force value of coming when the second pressure sensor 6 is detected is greater than setting value, by output controlling value, control screw drive motor reduction of speed (frequency converter timing), so that the detected pressure decreased coming of the second pressure sensor 6 reach the same with setting value.
Therefore, the melt of measuring pump 3 is to guarantee quantitatively, stably flow out always, thus control melt always stablizing, quantitatively output, without artificial by manual governing motor, control that just can be intelligent the quality of sheet material.
In addition, if needed, can also be according to the detected next force value of the 3rd pressure sensor 7, by controlling the speed of motors of metering pumps 13, so that detected pressure decreased or the rising coming of the 3rd pressure sensor 7, so that the detected pressure decreased coming of the second pressure sensor 6 reach the same with setting value.
Claims (7)
1. a sheet extruder with melt pressure control system, comprise fuselage, main frame, measuring pump, screen pack, melt pressure control system, described main frame, measuring pump, screen pack, melt pressure control system are arranged on respectively on fuselage, it is characterized in that: described melt pressure control system comprises
Pressure detection mechanism, the melt pressure at detection at least one place of sheet extruder, sends pressure detectable signal;
Control device, receives pressure detectable signal and processes, and sends speed regulating control signal;
Speed adjusting gear, receives at least one speed regulating control signal and controls the rotating speed of corresponding drive motors.
2. the sheet extruder with melt pressure control system as claimed in claim 1, is characterized in that: described pressure detection mechanism comprises the first pressure sensor, surveys the melt pressure before screen pack, sends the first pressure detectable signal.
3. the sheet extruder with melt pressure control system as claimed in claim 1, is characterized in that: described pressure detection mechanism also comprises the second pressure sensor, surveys the melt pressure between screen pack and measuring pump, sends the second pressure detectable signal.
4. the sheet extruder with melt pressure control system as claimed in claim 1, is characterized in that: described pressure detection mechanism also comprises the 3rd pressure sensor, surveys the melt pressure of metering pump discharge, sends the 3rd pressure detectable signal.
5. the sheet extruder with melt pressure control system as claimed in claim 1, is characterized in that: described control device comprises
Host computer, inputs various parameters by human-computer interaction interface;
PLC Programmable Logic Controller, receives above-mentioned various parameter and pressure detectable signal, after processing, exports at least one speed regulating control signal.
6. the sheet extruder with melt pressure control system as claimed in claim 5, it is characterized in that: described speed adjusting gear comprises main frame frequency converter, described PLC Programmable Logic Controller output main frame speed-regulating signal, described main frame frequency converter Receiving Host speed-regulating signal, main control system electric machine rotation.
7. the sheet extruder with melt pressure control system as claimed in claim 5, it is characterized in that: described speed adjusting gear comprises measuring pump frequency converter, described PLC Programmable Logic Controller output measuring pump speed-regulating signal, described measuring pump frequency converter receives measuring pump speed-regulating signal, controls motors of metering pumps and rotates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320489363.7U CN203438534U (en) | 2013-08-12 | 2013-08-12 | Sheet extrusion machine provided with melt pressure control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320489363.7U CN203438534U (en) | 2013-08-12 | 2013-08-12 | Sheet extrusion machine provided with melt pressure control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203438534U true CN203438534U (en) | 2014-02-19 |
Family
ID=50089608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320489363.7U Expired - Lifetime CN203438534U (en) | 2013-08-12 | 2013-08-12 | Sheet extrusion machine provided with melt pressure control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203438534U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103395190A (en) * | 2013-08-12 | 2013-11-20 | 广东达诚机械有限公司 | Sheet extruding machine with melt pressure control system |
| CN109571999A (en) * | 2018-12-17 | 2019-04-05 | 浙江大学台州研究院 | It is a kind of can self-balancing pressure plastic composite fibre production equipment |
| CN114102896A (en) * | 2020-08-27 | 2022-03-01 | 仙桃市聚兴橡胶有限公司 | Manufacturing method for producing tire reclaimed rubber by plasticizing of normal-pressure continuous plasticizing machine |
| CN114654701A (en) * | 2022-04-01 | 2022-06-24 | 贺瑞峰 | Alternate drip irrigation tape extrusion and filtration system |
-
2013
- 2013-08-12 CN CN201320489363.7U patent/CN203438534U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103395190A (en) * | 2013-08-12 | 2013-11-20 | 广东达诚机械有限公司 | Sheet extruding machine with melt pressure control system |
| CN109571999A (en) * | 2018-12-17 | 2019-04-05 | 浙江大学台州研究院 | It is a kind of can self-balancing pressure plastic composite fibre production equipment |
| CN109571999B (en) * | 2018-12-17 | 2021-04-30 | 浙江大学台州研究院 | Plastic composite fiber production equipment capable of automatically balancing pressure |
| CN114102896A (en) * | 2020-08-27 | 2022-03-01 | 仙桃市聚兴橡胶有限公司 | Manufacturing method for producing tire reclaimed rubber by plasticizing of normal-pressure continuous plasticizing machine |
| CN114654701A (en) * | 2022-04-01 | 2022-06-24 | 贺瑞峰 | Alternate drip irrigation tape extrusion and filtration system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Lu Shengping Industrial Zone Jinping District 515041 Guangdong city of Shantou province No. 28 Patentee after: GUANGDONG DESIGNER TECHNOLOGY Co.,Ltd. Address before: Lu Shengping Industrial Zone Jinping District 515041 Guangdong city of Shantou province No. 28 Patentee before: GUANGDONG DESIGNER MACHINERY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 7 / F, management committee building, Jinping private science and Technology Park, middle section of Da Xue Road, Shantou City, Guangdong Province Patentee after: Guangdong Dacheng Technology Co.,Ltd. Address before: Lu Shengping Industrial Zone Jinping District 515041 Guangdong city of Shantou province No. 28 Patentee before: GUANGDONG DESIGNER TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |