CN202494940U - Temperature control system of air pressure thermoforming machine - Google Patents
Temperature control system of air pressure thermoforming machine Download PDFInfo
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- CN202494940U CN202494940U CN 201220102958 CN201220102958U CN202494940U CN 202494940 U CN202494940 U CN 202494940U CN 201220102958 CN201220102958 CN 201220102958 CN 201220102958 U CN201220102958 U CN 201220102958U CN 202494940 U CN202494940 U CN 202494940U
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Abstract
The utility model relates to a temperature control system of an air pressure thermoforming machine. Through refining a heating area into a plurality of temperature zones, the system collects the real-time temperature at positions close to sheet in each temperature zone and controls overall output power of all heating units in each temperature zone by adopting a fuzzy PID control method according to the real-time temperature to control variations in temperature of each temperature zone quickly and precisely, thereby enabling the temperature of the sheet to be controlled more precisely, improving the forming effect, improving the qualified rate of products, and simplifying a control structure at the same time.
Description
Technical field
The utility model relates to a kind of temperature control temperature control system, relates in particular to a kind of temperature control system of pneumatic thermoforming machine.
Background technology
Pneumatic thermoforming machine is a kind of plastics forming equipment that is used to make identical product; The thermoplastic plastic sheet is heated to softening; Under the gaseous tension effect, adopt suitable mold to make it become goods, simultaneously can be according to certain procedure duplication of production circulation.The temperature control system of pneumatic thermoforming machine is the key component of pneumatic thermoforming machine work, directly affects the effect of pneumatic thermoforming machine moulding.At present, the temperature control system of pneumatic thermoforming machine generally all is the central temperature of gathering the heating tile, and adopts complicated control system to carry out temperature control according to the central temperature of heating tile.Like this; Differ greatly from heating tile temperature of gather and the temperature that is heated sheet material, and the variation that is heated sheet temperature can not in time be reflected on the temperature of gathering, have tangible hysteresis quality; Affect the effect of pneumatic thermoforming machine moulding, product percent of pass reduces.
Summary of the invention
The technical matters that the utility model will solve provides a kind of temperature control system of pneumatic thermoforming machine, makes that the temperature control of thermoforming machine is simpler, and temperature control precision increases substantially the effect of raising moulding, the qualification rate of raising product.The technical scheme that adopts is following:
A kind of temperature control system of pneumatic thermoforming machine; Comprise heating arrangement, at least two temperature detection devices and temperature control equipment; Heating arrangement all is connected with temperature control equipment with temperature detection device, it is characterized in that: said heating arrangement comprises a plurality of heating unit and a plurality of heating units down gone up; Throughput direction along sheet material; The heating region of pneumatic thermoforming machine is provided with at least two warm areas successively; Be provided with heating unit at least one, at least one following heating unit and a temperature detection device in each warm area, temperature detection device is located between heating unit and the following heating unit.
The general temperature sensor that adopts of said temperature sniffer can be preferably K type thermocouple probe, and it is good that K type thermopair has the linearity; Thermopower is bigger, and is highly sensitive, and stability and homogeneity are better; Antioxygenic property is strong; Advantages such as low price can be used for the oxidisability inert atmosphere and extensively adopted by the user, and it can directly measure the surface temperature of the liquid vapour from 0 ℃ to 1300 ℃ of scopes and gas medium and solid in the various productions; The above-mentioned heating unit of going up generally adopts the heating tile with following heating unit.
Temperature detection device detects goes up near the real time temperature the sheet material between heating unit and the following heating unit in each warm area, and each real time temperature is uploaded to temperature control equipment, in temperature control equipment; Each real time temperature requires temperature to make comparisons with sheet material respectively; Draw the temperature departure value of each warm area, control the overall output power of all heating units in the corresponding warm area then respectively through the temperature departure value of each warm area, to adjust the temperature of this warm area; Make it more and more near the sheet temperature requirement; Both reach the purpose of accurate control temperature, improved the effect of moulding, improved the qualification rate of product; It is complicated to avoid warm area too much to control again, reaches the purpose of simplifying control.
Preferred version as the utility model is characterized in that: said temperature control equipment comprises at least two temperature collect modules, main control module and at least two execution modules; Each temperature collect module all is connected with main control module with execution module; Each temperature collect module is connected with corresponding temperature detection device; Each execution module is with corresponding upward heating unit, heating unit is connected down.Temperature collect module receives the detected real time temperature of temperature detection device; Be converted into numerical value; In main control module, carry out computing through preset algorithm; Send instruction through execution module at last, heating unit is gone up in indication accordingly, heating unit increases or reduces output power down, thereby controls the overall output power of last heating units all in each warm area, following heating unit.
As the further preferred version of the utility model, it is characterized in that: said main control module is a fuzzy controller.Preferred fuzzy controller adopts FPGA as its main control chip.FPGA (Field-Programmable Gate Array); It is field programmable gate array; It occurs as a kind of semi-custom circuit in special IC (ASIC) field, has both solved the deficiency of custom circuit, has overcome the limited shortcoming of original programming device gate circuit number again.We can say that fpga chip is one of optimal selection of short run system raising level of integrated system, reliability.The Spartan-3XC3S200 that further preferred FPGA produces for Xilinx company.Spartan3 is that a kind of low-cost and high-performance logic in enormous quantities solves device, stresses low cost applications, and capacity is medium, and performance can satisfy general logical design requirement.The characteristics of Spartan-3 XC3S200 are high-performance, and dominant frequency can reach 50MHz, and high I/O quantity is up to 141 I/O ports.The I/O driving force is strong, up 36mA; Support nearly 24 kinds I/O standard (Spartan-3E supports 18 kinds); Support DCI (digital control impedance matching).Inside information and I/O port that these are abundant make Spartan-3XC3S200 can realize the multidata parallel processing, and carry out certain logical operation, realize complicated control algolithm and various communication modes.In order to control more heating unit, the following heating unit gone up, also can preferably adopt the main control chip of two Spartan-3 XC3S200 whiles, the various information of parallel processing as fuzzy controller.
As the further preferred version of the utility model, it is characterized in that: said temperature collect module comprises temperature transmitter and A/D converter; The input end of temperature transmitter is connected with temperature detection device, and the output terminal of temperature transmitter is connected with the input end of A/D converter, and the output terminal of A/D converter is connected with the respective input of main control module.Temperature transmitter is preferably SBWR type K type temperature transmitter, and this temperature transmitter is a kind ofly to convert temperature variable the instrument of transmissible standardization output signal into, is input as 24V; Be output as 4～20mA, be mainly used in the measurement and the control of industrial process temperature parameter, it has the output signal zero and the full scale potentiometer is regulated; Conversion accuracy is high; Linearization is proofreaied and correct, and volume is little, lightweight characteristics.A/D converter preferably adopts the MAX1280 chip; MAX1280 is that 12 ADC combines one 8 tunnels analogy input multiplexer; Have the sampling/maintenance of high bandwidth and the characteristics of high slewing rate, use low-power consumption serial line interface and FPGA to carry out communication, use simple and stable.
As the further preferred version of the utility model, it is characterized in that: said execution module comprises amplifier, two resistance and solid-state relay; The base stage of amplifier is connected with the corresponding output end of main control module through one of them resistance; The grounded emitter of amplifier; The collector of amplifier is connected with an end of another resistance; The input end of solid-state relay is connected with the collector of amplifier, the output terminal of solid-state amplifier with each on heating unit, down heating unit is connected.In control, the other end that connects the resistance of amplifier collector connects the power supply of 24V, comes from the break-make of the control signal control 24V power supply of main control module, thereby realizes the break-make of solid-state relay.When the input control signal from main control module was 0V, solid-state relay was in conducting state, output 24V; When the input control signal from main control module is during greater than 0V, solid-state relay is in off-state, output 0V.Can adopt the 2N3904 element by further preferred amplifier.
The utility model compared with prior art has following advantage: through heating region being refined as a plurality of warm areas; Gather in each warm area real time temperature respectively, and control the overall output power of all heating units in each warm area, fast, accurately control the temperature variation of each warm area according to this temperature near the sheet material position; Thereby make the temperature of sheet material obtain controlling more accurately; Improve the effect of moulding, improve the qualification rate of product, simplified control structure simultaneously again.
Description of drawings
Fig. 1 is the schematic layout pattern of the utility model preferred implementation;
Fig. 2 is the frame principle figure of the utility model preferred implementation;
Fig. 3 is the schematic diagram of temperature collect module in the utility model preferred implementation;
Fig. 4 is the schematic diagram of execution module in the utility model preferred implementation.
Embodiment
Do further explanation below in conjunction with the preferred implementation of accompanying drawing and the utility model.
As depicted in figs. 1 and 2, the temperature control system of this pneumatic thermoforming machine comprises heating arrangement 1, three K type thermocouple probes 2 and temperature control equipments 3, and heating arrangement 1 all is connected with temperature control equipment 3 with K type thermocouple probe 2; Heating arrangement 1 comprises 12 last heating tiles 101 and 12 following heating tiles 102; Throughput direction along sheet material; The heating region of pneumatic thermoforming machine is provided with 3 warm areas successively; Be respectively first warm area 4, second warm area 5 and the three-temperature-zone 6; Be provided with four in each warm area and go up heating tile 101, four heating tile 102 and a K type thermocouple probe 2 down, K type thermocouple probe 2 is located at heating tile 101 and following position of heating between the tile 102 near sheet material.
Temperature control equipment 3 comprises three temperature collect modules 301, main control module 302 and three execution modules 303; Each temperature collect module 301 all is connected with main control module 302 with execution module 303; Each temperature collect module 301 is connected with corresponding K type thermocouple probe 2; Each execution module 303 with corresponding go up heating tile 101, heat tile 102 down and be connected.
Main control module 302 is a fuzzy controller, constitutes the main control chip of PID controller by a FPGA3021 and the 2nd FPGA3022, and a FPGA3021 and the 2nd FPGA3022 all adopt Spartan-3XC3S200.
As shown in Figure 3, temperature collect module 301 comprises temperature transmitter 3011 and A/D converter 3012; The input end of temperature transmitter 3011 is connected with K type thermocouple probe 2, and the output terminal of temperature transmitter 3011 is connected with the input end of A/D converter 3012, and the output terminal of A/D converter 3012 is connected with the respective input of main control module 302.
As shown in Figure 4, execution module 303 comprises amplifier 3031, first resistance 3032, second resistance 3033 and solid-state relay 3034; The base stage of amplifier 3031 is connected with the corresponding output end of main control module 302 through first resistance 3032; The grounded emitter of amplifier 3031; The collector of amplifier 3031 is connected with an end of second resistance 3033; The input end of solid-state relay 3034 is connected with the collector of amplifier 3031, the output terminal of solid-state amplifier 3034 with each on heating tile 101, heat tile 102 down and be connected.In control, the other end that connects the resistance of amplifier collector connects the power supply of 24V, comes from the break-make of the control signal control 24V power supply of main control module, thereby realizes the break-make of solid-state relay.When the input control signal from main control module was 0V, solid-state relay was in conducting state, output 24V; When the input control signal from main control module is during greater than 0V, solid-state relay is in off-state, output 0V.Can adopt the 2N3904 element by further preferred amplifier.
The concrete temperature control process of the temperature control system of above-mentioned pneumatic thermoforming machine is following:
Temperature collect module 301 receives K type thermocouple probe 2 detected real time temperatures through temperature transmitter 3011; And be converted into numerical value through A/D converter 3012; In main control module, carry out computing through preset fuzzy algorithm; Send instruction (promptly being break-make) through each execution module 303 at last through amplifier 3031 control solid-state relays 3034; Indication is corresponding goes up heating tile 101, heat tile 102 down increases or reduces output power, allly in first warm area 4, second warm area 5 and the three-temperature-zone 6 goes up heating tile 101, heats the overall output power of tile 102 down thereby control respectively.
Claims (5)
1. the temperature control system of a pneumatic thermoforming machine; Comprise heating arrangement, at least two temperature detection devices and temperature control equipment; Heating arrangement all is connected with temperature control equipment with temperature detection device, it is characterized in that: said heating arrangement comprises a plurality of heating unit and a plurality of heating units down gone up; Throughput direction along sheet material; The heating region of pneumatic thermoforming machine is provided with at least two warm areas successively; Be provided with heating unit at least one, at least one following heating unit and a temperature detection device in each warm area, temperature detection device is located between heating unit and the following heating unit.
2. temperature control system as claimed in claim 1 is characterized in that: said temperature control equipment comprises at least two temperature collect modules, main control module and at least two execution modules; Each temperature collect module all is connected with main control module with execution module; Each temperature collect module is connected with corresponding temperature detection device; Each execution module is with corresponding upward heating unit, heating unit is connected down.
3. temperature control system as claimed in claim 2 is characterized in that: said main control module is a fuzzy controller.
4. temperature control system as claimed in claim 2 is characterized in that: said temperature collect module comprises temperature transmitter and A/D converter; The input end of temperature transmitter is connected with temperature detection device, and the output terminal of temperature transmitter is connected with the input end of A/D converter, and the output terminal of A/D converter is connected with the respective input of main control module.
5. temperature control system as claimed in claim 2 is characterized in that: said execution module comprises amplifier, two resistance and solid-state relay; The base stage of amplifier is connected with the corresponding output end of main control module through one of them resistance; The grounded emitter of amplifier; The collector of amplifier is connected with an end of another resistance; The input end of solid-state relay is connected with the collector of amplifier, the output terminal of solid-state amplifier with each on heating unit, down heating unit is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220102958 CN202494940U (en) | 2012-03-17 | 2012-03-17 | Temperature control system of air pressure thermoforming machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220102958 CN202494940U (en) | 2012-03-17 | 2012-03-17 | Temperature control system of air pressure thermoforming machine |
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| Publication Number | Publication Date |
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| CN202494940U true CN202494940U (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220102958 Expired - Lifetime CN202494940U (en) | 2012-03-17 | 2012-03-17 | Temperature control system of air pressure thermoforming machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601987A (en) * | 2012-03-17 | 2012-07-25 | 广东达诚机械有限公司 | Temperature control method and system of air-pressure thermoforming machine |
-
2012
- 2012-03-17 CN CN 201220102958 patent/CN202494940U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601987A (en) * | 2012-03-17 | 2012-07-25 | 广东达诚机械有限公司 | Temperature control method and system of air-pressure thermoforming machine |
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Legal Events
| Date | Code | Title | Description |
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| 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 Dacheng 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. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121017 |