CN113492505A - High-low temperature hot oil control system with high temperature control precision - Google Patents
High-low temperature hot oil control system with high temperature control precision Download PDFInfo
- Publication number
- CN113492505A CN113492505A CN202010198591.3A CN202010198591A CN113492505A CN 113492505 A CN113492505 A CN 113492505A CN 202010198591 A CN202010198591 A CN 202010198591A CN 113492505 A CN113492505 A CN 113492505A
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- China
- Prior art keywords
- pressure
- hot oil
- temperature
- low temperature
- oil
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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
- 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
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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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76531—Temperature
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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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76655—Location of control
- B29C2945/76732—Mould
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76655—Location of control
- B29C2945/76775—Fluids
- B29C2945/76785—Fluids hydraulic fluids
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a high-low temperature hot oil control system with high temperature control precision, which comprises a high-low temperature oil tank, a refrigerating and heating unit, a heat exchange module, a first circulating pump, a pressure stabilizing tank, an air filter, a second circulating pump, a high-pressure filter, an energy accumulator, a thermometer, a heater, calibration software, a second thermometer, a backpressure valve bank, a cooler and a PLC (programmable logic controller). The invention can solve the problems that the temperature control system of the existing mold temperature controller has potential safety hazard when working at high temperature and has low response speed when switching between high temperature and low temperature to control the molding temperature of a product.
Description
Technical Field
The invention belongs to the technical field of intelligent control systems, and particularly relates to a high-low temperature hot oil control system with high temperature control precision.
Background
In injection molding, an injection machine molds a thermoplastic or thermosetting plastic into plastic articles of various shapes using a plastic molding die. Injection moulding realizes through injection molding machine and mould, and the temperature of plastic products forming die needs accurate control, and the high temperature, the deformation appears easily in the finished product, and the temperature is crossed lowly, and the weld mark appears easily in the finished product surface. The conventional method for controlling the temperature of the forming die in the industry is to use a steam conversion die temperature machine to control production, but a temperature control system of the die temperature machine is not suitable for some injection products which need high-temperature injection at a temperature of more than 200 ℃ and are cooled and formed below 100 ℃, because steam is used for heating, the higher the temperature is, the higher the pressure is, the higher the steam pressure is, certain hidden danger exists in the use safety of equipment, and the response speed of the temperature control system of the die temperature machine is slow when high temperature and low temperature are switched.
Disclosure of Invention
The invention mainly solves the technical problem of providing a high-low temperature hot oil control system with high temperature control precision, and can solve the problems that the temperature control system of the existing mold temperature controller has potential safety hazards during high-temperature work and has low response speed when the molding temperature of a product is switched and controlled between high temperature and low temperature.
In order to solve the technical problems, the invention adopts a technical scheme that: a high-low temperature hot oil control system with high temperature control precision comprises a high-low temperature oil tank, a refrigerating and heating unit, a heat exchange module, a first circulating pump, a pressure stabilizing tank, an air filter, a second circulating pump, a high-pressure filter, an energy accumulator, a thermometer, a heater, calibration software, a second thermometer, a backpressure valve bank, a cooler and a PLC (programmable logic controller);
wherein, the refrigeration heating unit refrigerates or heats heat-conducting oil, hot oil in the high-low temperature oil tank exchanges heat with the heat-conducting oil in the heat exchange module, the refrigerated or heated hot oil is sequentially pressurized by the first circulating pump, pressure pulsation is eliminated by the pressure stabilizing tank, air in the hot oil is eliminated by the air filter, pollutants in the hot oil are eliminated by the filter, clean and stable-pressure low-pressure oil is supplied to the second circulating pump for further pressurization to obtain high-pressure hot oil, the high-pressure hot oil is further eliminated by the high-pressure filter, the high-pressure pulsation is eliminated by the energy accumulator, and the high-pressure oil finally flows into the heater by the thermometer, and is calibrated by calibration software, and is corrected by a second thermometer, and finally the hot oil returns to the high-low temperature oil tank through a cooler, and all the components of the system are controlled by a PLC controller, and the state of the system is monitored.
Further, the refrigerating and heating unit refrigerates or heats the heat conducting oil through the compressor and the electric heater.
Further, the correction is performed by detecting the temperature of the hot oil by the second thermometer.
Furthermore, an intermediate medium heat exchange mode is adopted to heat or refrigerate hot oil in the heat exchange module.
Furthermore, the back pressure valve group is adjusted to provide continuously adjustable back pressure for the hot oil during verification and correction.
Furthermore, the backpressure valve group is 3 program control backpressure regulating valves, and the backpressure regulating valves are combined for use according to the temperature range requirement of the thermometer.
Furthermore, during calibration, calibration is carried out on different flow and pressure state points, a pressure-flow characteristic curve is fitted, the pressure behind the thermometer is collected by the PLC, and the back pressure valve group is subjected to closed-loop control according to the pressure-flow characteristic curve so as to realize back pressure regulation.
Further, the heater adopts high-precision heater of high pressure resistant high low temperature.
The invention has the beneficial effects that: the problem that a temperature control system of an existing mold temperature controller has potential safety hazards during high-temperature work and is low in response speed when the molding temperature of a product is controlled by switching between high temperature and low temperature can be solved.
Drawings
FIG. 1 is a schematic diagram of the operation of the present invention;
the parts in the drawings are marked as follows:
the system comprises a high-low temperature oil tank 1, a refrigerating and heating unit 2, a heat exchange module 3, a first circulating pump 4, a pressure stabilizing tank 5, an air filter 6, a filter 7, a second circulating pump 8, a high-pressure filter 9, an energy accumulator 10, a thermometer 11, a heater 12, calibration software 13, a second thermometer 14, a backpressure valve bank 15, a cooler 16 and a PLC 17.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Example (b): as shown in fig. 1, the system comprises a high-low temperature oil tank 1, a refrigeration and heating unit 2, a heat exchange module 3, a first circulating pump 4, a pressure stabilizing tank 5, an air filter 6, a filter 7, a second circulating pump 8, a high-pressure filter 9, an energy accumulator 10, a thermometer 11, a heater 12, calibration software 13, a second thermometer 14, a backpressure valve bank 15, a cooler 16 and a PLC controller 17;
wherein, the refrigeration heating unit refrigerates or heats heat-conducting oil, hot oil in the high-low temperature oil tank exchanges heat with the heat-conducting oil in the heat exchange module, the refrigerated or heated hot oil is sequentially pressurized by the first circulating pump, pressure pulsation is eliminated by the pressure stabilizing tank, air in the hot oil is eliminated by the air filter, pollutants in the hot oil are eliminated by the filter, clean and stable-pressure low-pressure oil is supplied to the second circulating pump for further pressurization to obtain high-pressure hot oil, the high-pressure hot oil is further eliminated by the high-pressure filter, the high-pressure pulsation is eliminated by the energy accumulator, and the high-pressure oil finally flows into the heater by the thermometer, and is calibrated by calibration software, and is corrected by a second thermometer, and finally the hot oil returns to the high-low temperature oil tank through a cooler, and all the components of the system are controlled by a PLC controller, and the state of the system is monitored.
The refrigerating and heating unit refrigerates or heats heat-conducting oil through a compressor and an electric heater.
And during correction, the temperature of the hot oil is detected by a second thermometer for correction.
And heating or refrigerating hot oil in the heat exchange module by adopting an intermediate medium heat exchange mode.
And continuously adjustable back pressure is provided for the hot oil by adjusting the back pressure valve bank during verification and correction.
The backpressure valve group is 3 program control backpressure regulating valves, and is combined for use according to the temperature range requirement of the thermometer.
During calibration, different flow and pressure state points are calibrated, a pressure-flow characteristic curve is fitted, pressure behind the thermometer is collected by the PLC, and the back pressure valve group is subjected to closed-loop control according to the pressure-flow characteristic curve so as to realize back pressure regulation.
The heater adopts high-pressure resistant high-temperature and low-temperature resistant high-precision heater.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The utility model provides a high low temperature hot oil control system that temperature control precision is high which characterized in that: the system comprises a high-low temperature oil tank, a refrigerating and heating unit, a heat exchange module, a first circulating pump, a pressure stabilizing tank, an air filter, a second circulating pump, a high-pressure filter, an energy accumulator, a thermometer, a heater, calibration software, a second thermometer, a backpressure valve group, a cooler and a PLC (programmable logic controller);
wherein, the refrigeration heating unit refrigerates or heats heat-conducting oil, hot oil in the high-low temperature oil tank exchanges heat with the heat-conducting oil in the heat exchange module, the refrigerated or heated hot oil is sequentially pressurized by the first circulating pump, pressure pulsation is eliminated by the pressure stabilizing tank, air in the hot oil is eliminated by the air filter, pollutants in the hot oil are eliminated by the filter, clean and stable-pressure low-pressure oil is supplied to the second circulating pump for further pressurization to obtain high-pressure hot oil, the high-pressure hot oil is further eliminated by the high-pressure filter, the high-pressure pulsation is eliminated by the energy accumulator, and the high-pressure oil finally flows into the heater by the thermometer, and is calibrated by calibration software, and is corrected by a second thermometer, and finally the hot oil returns to the high-low temperature oil tank through a cooler, and all the components of the system are controlled by a PLC controller, and the state of the system is monitored.
2. The high and low temperature hot oil control system with high temperature control precision according to claim 1, wherein: the refrigerating and heating unit refrigerates or heats heat-conducting oil through a compressor and an electric heater.
3. The high and low temperature hot oil control system with high temperature control precision according to claim 1, wherein: and during correction, the temperature of the hot oil is detected by a second thermometer for correction.
4. The high and low temperature hot oil control system with high temperature control precision according to claim 1, wherein: and heating or refrigerating hot oil in the heat exchange module by adopting an intermediate medium heat exchange mode.
5. The high and low temperature hot oil control system with high temperature control precision according to claim 1, wherein: and continuously adjustable back pressure is provided for the hot oil by adjusting the back pressure valve bank during verification and correction.
6. The high and low temperature hot oil control system with high temperature control precision according to claim 1, wherein: the backpressure valve group is 3 program control backpressure regulating valves, and is combined for use according to the temperature range requirement of the thermometer.
7. The high and low temperature hot oil control system with high temperature control precision according to claim 1, wherein: during calibration, different flow and pressure state points are calibrated, a pressure-flow characteristic curve is fitted, pressure behind the thermometer is collected by the PLC, and the back pressure valve group is subjected to closed-loop control according to the pressure-flow characteristic curve so as to realize back pressure regulation.
8. The high and low temperature hot oil control system with high temperature control precision according to claim 1, wherein: the heater adopts high-pressure resistant high-temperature and low-temperature resistant high-precision heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010198591.3A CN113492505A (en) | 2020-03-20 | 2020-03-20 | High-low temperature hot oil control system with high temperature control precision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010198591.3A CN113492505A (en) | 2020-03-20 | 2020-03-20 | High-low temperature hot oil control system with high temperature control precision |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113492505A true CN113492505A (en) | 2021-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010198591.3A Pending CN113492505A (en) | 2020-03-20 | 2020-03-20 | High-low temperature hot oil control system with high temperature control precision |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113492505A (en) |
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2020
- 2020-03-20 CN CN202010198591.3A patent/CN113492505A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20211012 |
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| WD01 | Invention patent application deemed withdrawn after publication |