CN110480986A - A kind of online shaping dies of long fiber reinforcement composite material and temprature control method - Google Patents
A kind of online shaping dies of long fiber reinforcement composite material and temprature control method Download PDFInfo
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- CN110480986A CN110480986A CN201910762392.8A CN201910762392A CN110480986A CN 110480986 A CN110480986 A CN 110480986A CN 201910762392 A CN201910762392 A CN 201910762392A CN 110480986 A CN110480986 A CN 110480986A
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- lower die
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000002131 composite material Substances 0.000 title claims abstract description 36
- 239000000835 fiber Substances 0.000 title claims abstract description 25
- 230000002787 reinforcement Effects 0.000 title claims abstract description 23
- 238000007493 shaping process Methods 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 133
- 238000009413 insulation Methods 0.000 claims abstract description 41
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 239000000498 cooling water Substances 0.000 claims description 30
- 238000001514 detection method Methods 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000012935 Averaging Methods 0.000 claims description 6
- 238000005485 electric heating Methods 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000012545 processing Methods 0.000 abstract description 9
- 230000006872 improvement Effects 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 5
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 17
- 239000000243 solution Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- -1 infiltration Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/18—Thermoforming apparatus
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/30—Moulds
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/42—Heating or cooling
- B29C51/428—Heating or cooling of moulds or mould parts
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/46—Measuring, controlling or regulating
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/023—Industrial applications
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The embodiment of the invention discloses a kind of online shaping dies of long fiber reinforcement composite material, including upper die holder and lower die holder, upper thermal insulation board and lower thermal insulation board are separately installed in upper die holder and lower die holder, and upper mold temperature sensor and lower die temperature sensor are separately installed in the end of upper die holder and lower die holder, the upper thermal insulation board inner surface is equipped with upper mold core, upper coldplate is equipped between upper thermal insulation board and upper mold core, lower mold core is equipped in lower thermal insulation board inner surface, and the lower coldplate between lower thermal insulation board and lower mold core, heating tank is equipped on the outside of the upper mold core and lower mold core, sink is equipped on upper coldplate and lower coldplate, it further include a kind of temprature control method；It can satisfy the intracavitary product of complicated die type being evenly heated and cooling down in real time in forming process, it is not high that mold temperature controls improvement cost, flexible design and processing can be carried out according to the technological requirements, are advantageously implemented the consistency of composite products each section performance, improved production efficiency and energy conservation.
Description
Technical field
The present embodiments relate to technical field of mold, and in particular to a kind of online finishing die of long fiber reinforcement composite material
Tool and temprature control method.
Background technique
Long fiber reinforcement composite material has the characteristics that excellent specific strength, specific modulus, corrosion-resistant, is particularly suitable for light
Quantization, the forming of the demanding complicated shape part of specific strength, are widely applied in fields such as space flight and aviation, high-speed rail, automobiles,
Existing steel, light-alloy structure component are substituted, increasingly important role is played.
The online die forming technology of long fiber reinforcement composite material (LFT-D technique) is that glass or carbon fiber is isometric
The materials such as fiber, thermoplastic resin, compatilizer, according to material prescription ratio, using high-precision feeder, double screw extruder etc.
Equipment realizes the mixed processes such as mixture, infiltration, fibre cutting, cladding, squeezes out through die head, after metering cutting, by heat preservation conveyer
It is transmitted to designated position, using manipulator or is manually placed into mold compression moulding.Compared with Traditional GM T die forming technique,
Semi-finished product preparation step is omitted in LFT-D technique, thus increases substantially production efficiency, more at low cost than traditional handicraft 20%~
50%, the mechanical performance of product improves about 30%~40%.
Whether traditional GMT technique or LFT-D technique, in order to realize production efficiently quickly, qualified, finishing die
The design of tool is all one of most important technological factor in forming process.Existing scheme: currently, GMT technique and LFT-D technique
Mold is all using the composition such as die holder, mold core, cooling and temperature elevation system, and the mould bases generally comprises upper and lower die holder, distribution peace
On press slide and workbench, play fixed mold core and resetting；The mold core generally comprises upper die and lower die；
The cooling and temperature elevation system mainly includes several hoses being connected on upper and lower mold core and die heater, water cooling unit etc..Usually
It is that the pipe interface of die heater and water cooling unit is connected with multiple heating on mold core with the interface of cooling straight-through runner, works as blank
Before being placed into lower die from heat-insulation conveying device crawl, conduction oil injection upper and lower mould heating pipe is heated mold core by die heater,
It molds simultaneously；After the completion of molding, upper and lower mould heating pipe is discharged in conduction oil by die heater, while water cooling unit injects cooling water
Lower die cooling pipe and cavity plate cooling pipe carry out cooling mold core, and pressure maintaining is opened afterwards for a period of time；Under entering after taking-up workpiece
One circulate operation period.
Technical problem of the existing technology: in this way with structure, although GMT technique and LFT-D may be implemented
The manufacture of the long fiber reinforcement composite products of technique, but because die heater and water cooling unit require a large amount of metal hoses and up and down
Mold core is connected, and the volume of product is bigger, shape is more complicated, then hose and the connector quantity for connecting mold core are more, influences live peace
Oil liquid disclosure risk increases while complete.And the conduction oil of die heater needs annual replacement, if be used for a long time more than 150 DEG C with
On, then it needs every three months replacement primary, not only will increase treatment cost of waste liquor, deal with improperly, one can be caused to ecological environment
Fixing is rung.In addition, heating on mold and coolant flow channel be by conventional machining means because being limited, for example, by using depth drill processing stream
Road can only generally process straight hole on mold, even if as far as possible according to the mold heating arranged evenly of type chamber and coolant flow channel, it is also difficult to
Meet being evenly heated and cooling down for the intracavitary composite products of complicated die type, leads to each position of product taken out after molding
Performance can have a certain difference.
Summary of the invention
For this purpose, the embodiment of the present invention provides a kind of online shaping dies of long fiber reinforcement composite material and temperature controlling party
Method can satisfy the intracavitary composite products of complicated die type being evenly heated and cooling down in real time in forming process, mold temperature
Degree control improvement cost is not high, and heating system and cooling system can carry out flexible design and processing according to the technological requirements, favorably
In realizing the consistency of composite products each section performance, improving production efficiency and energy conservation, to solve to be difficult in the prior art
Meet that complicated die type is intracavitary to be evenly heated and cool down and properties of product is caused the problem of difference occur.
To achieve the goals above, embodiments of the present invention provide the following technical solutions:
A kind of online shaping dies of long fiber reinforcement composite material, including the upper die holder being mounted on press top shoe and peace
Dress lower die holder on the table, is separately installed with upper thermal insulation board and lower thermal insulation board in the upper die holder and lower die holder, and
The end of the upper die holder and lower die holder is separately installed with upper mold temperature sensor and lower die temperature sensor；
The upper thermal insulation board inner surface is equipped with upper mold core, and is equipped with and is in close contact between the upper thermal insulation board and upper mold core
Upper coldplate, the lower thermal insulation board inner surface is equipped with lower mold core, and is equipped between the lower thermal insulation board and lower mold core close
The lower coldplate of contact；
The heating tank of helical form or hollow, the upper coldplate and lower cooling are equipped on the outside of the upper mold core and lower mold core
It is equipped on plate in the shape of a spiral or the sink of hollow.
As a preferred solution of the present invention, it is equipped with cooling water pipe in the sink, is located at the upper coldplate under
The cooling water pipe in coldplate is connected to the cooling circuit to form circulation with cooling water system respectively.
As a preferred solution of the present invention, it is equipped with high-temperature insulation heating wire in the heating tank, is located at the upper mold
Heating system has been electrically connected in the high-temperature insulation heating wire in core and lower mold core.
As a preferred solution of the present invention, the upper mold temperature sensor and lower die temperature sensor are electrically connected
There is PLC control system, the PLC control system and cooling water system, heating system are electrically connected, and the PLC control system
The temperature information control cooling water system and heating system formation fed back according to upper mold temperature sensor, lower die temperature sensor closes
Ring control.
As a preferred solution of the present invention, correspondence is respectively arranged on the opposite face of the upper die holder and lower die holder
Guide-localization slot and guide-localization column, and by being set on guide-localization column activity setting between upper die holder and lower die holder
There is pre- heat pad.
As a preferred solution of the present invention, the pre- heat pad includes heat collector panel, the heat build-up plate surface set respectively with
Upper die holder and the temperature of lower die holder fitting contact support heating layer, are divided into epicoele by the partition being fixedly mounted inside the heat collector panel
Room and lower chambers, and the mutually independent secondary electrical arranged in the shape of a spiral is separately installed in the upper chamber and bottom chamber portion
Heater strip, two groups of secondary electric heating wires are connected with the peripheral port for being located at heat collector panel side, and the peripheral port passes through connecting line
It is connected with heating system.
In addition, including the following steps: the present invention also provides a kind of temprature control method of online shaping dies
Step 100 opens die holder, and adds pre- heat pad between upper and lower die holder, and pre- heat pad is connect with heating system,
Start heating system and closed loop heater is carried out to pre- heat pad；
Step 200, when upper and lower die holder is heated to assigned temperature by pre- heat pad, be again turned on die holder and remove heating
Pad, starting heating system heat mold core and maintain preheating temperature；
Step 300 starts heating system to mold core progress closed loop heater temperature control in mold core after filling composite.
As a preferred solution of the present invention, in step 100, the specific steps of closure heating are carried out to pre- heat pad
Are as follows:
Temperature sensor is contacted with the fitting of upper and lower die holder respectively, and temperature detection signal is passed back in real time by step 101
PLC control system, synchronous averaging heating system；
Step 102, PLC control system according to temperature detection signal to heating system issue heating signal, to pre- heat pad into
Row heating is until upper and lower die holder surface temperature reaches designated value, and maintains the state is constant to continue 0.5~1 hour.
As a preferred solution of the present invention, the environment temperature according to locating for upper and lower die holder and the choosing of the temperature after preheating
It selects different temperature and supports heating layer, the Specific Principles of selection are as follows:
When environment temperature is lower than 20 DEG C, temperature of the heating rate less than 2 DEG C/min is selected to support heating layer, when environment temperature height
When 40 DEG C, heating rate is selected to support heating layer between 4 DEG C/min~6 DEG C/min temperature, when environment temperature is in 20 DEG C~40
When between DEG C, heating rate is selected to support heating layer between 2 DEG C/min~4 DEG C/min temperature；
When temperature after preheating is greater than 150 DEG C, the quantity of the feeding heating layer of temperature is no less than 3 layers, and temperature after preheating is not
When greater than 150 DEG C, the quantity of the feeding heating layer of temperature is 1~3 layer.
As a preferred solution of the present invention, in step 300, to the closed loop heater temperature control method of mold core specifically:
Step 301 again contacts temperature sensor with the fitting of upper and lower die holder respectively, and temperature detection signal is real-time
Pass PLC control system, synchronous averaging heating system and cooling water system back；
Step 302, PLC control system issue temperature control to heating system and cooling water system according to temperature detection signal
Signal, the heating signal for issuing anxious heat to mold core first carry out anxious heat to mold core, when the temperature of mold core is more than set temperature
After 10%, the temperature currently set is reverted to；
Step 303, hereafter at interval of 1/6~1/4 period triggering primary heating pulse signal until the temperature of mold core is super
Cross the 5% of setting value.
Embodiments of the present invention have the advantages that
(1) system of the long fiber reinforcement composite products of GMT technique and LFT-D technique may be implemented in mold of the invention
It makes, can satisfy the intracavitary composite products of complicated die type being evenly heated and cooling down in real time in forming process, do not have simultaneously
There are oil liquid disclosure risk and discharging of waste liquid, reduces environmental pollution, be conducive to the automation of production process.
(2) mold temperature of the invention control improvement cost is not high, and heating system can be wanted with cooling system according to technique
Ask carry out flexible design and processing, be advantageously implemented composite products each section performance consistency, improve production efficiency and
Energy conservation.
Detailed description of the invention
It, below will be to embodiment party in order to illustrate more clearly of embodiments of the present invention or technical solution in the prior art
Formula or attached drawing needed to be used in the description of the prior art are briefly described.It should be evident that the accompanying drawings in the following description is only
It is merely exemplary, it for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer, which is extended, obtains other implementation attached drawings.
Structure depicted in this specification, ratio, size etc., only to cooperate the revealed content of specification, for
Those skilled in the art understands and reads, and is not intended to limit the invention enforceable qualifications, therefore does not have technical
Essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the function of the invention that can be generated
Under effect and the purpose that can reach, should all still it fall in the range of disclosed technology contents obtain and can cover.
Fig. 1 is the overall structure diagram in embodiment of the present invention；
Fig. 2 is the preheating mat structure schematic diagram in embodiment of the present invention；
Fig. 3 is the flow diagram of the temperature control method in embodiment of the present invention；
In figure: 1- upper die holder；The upper thermal insulation board of 2-；The upper coldplate of 3-；4- upper mold core；5- heating tank；6-PLC control system；
7- high-temperature insulation heating wire；8- upper mold temperature sensor；9- lower die temperature sensor；10- cooling water pipe；The pre- heat pad of 11-；12-
Sink；13- lower mold core；Coldplate under 14-；Thermal insulation board under 15-；16- lower die holder；
61- cooling water system；62- heating system；
1101- guide-localization slot；1102- guide-localization column；1103- heat collector panel；1104- temperature supports heating layer；1105- grade
Electric heating wire；1106- peripheral port.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily, it is clear that described embodiment is the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
As shown in Figure 1, the present invention provides a kind of online shaping dies of long fiber reinforcement composite material, including it is mounted on pressure
Upper die holder 1 on machine top shoe and the lower die holder 16 being installed on the workbench, pacify respectively in the upper die holder 1 and lower die holder 16
Equipped with upper thermal insulation board 2 and lower thermal insulation board 15, upper thermal insulation board 2 and lower thermal insulation board 15 are made of Ni-based Heat-insulation metal material, and
It is mounted between die holder and mold core, heat can be effectively reduced and pass to upper die holder 1 and lower die holder 16, be conducive to 4 He of upper mold core
The quick temperature control of lower mold core 13 and energy conservation.
And upper mold temperature sensor 8 and lower die temperature biography are separately installed in the end of the upper die holder 1 and lower die holder 16
Sensor 9, upper mold temperature sensor 8 and 9 quantity of lower die temperature sensor be it is multiple, can according to it is temperature controlled requirement flexibly choosing
Setting position is selected, realizes the control of accurate temperature so that temperature information timely to be fed back to control system.
2 inner surface of upper thermal insulation board is equipped with upper mold core 4, and is equipped with closely between the upper thermal insulation board 2 and upper mold core 4
The upper coldplate 3 of contact, lower 15 inner surface of thermal insulation board are equipped with lower mold core 13, and in the lower thermal insulation board 15 and lower mold core 13
Between be equipped be in close contact lower coldplate 14.
The heating tank 5 of helical form or hollow, upper 3 He of coldplate are equipped on the outside of the upper mold core 4 and lower mold core 13
It is equipped on lower coldplate 14 in the shape of a spiral or the sink 12 of hollow.
Cooling water pipe 10, the cooling in the upper coldplate 3 and lower coldplate 14 are equipped in the sink 12
Water pipe 10 is connected to the cooling circuit for forming circulation with cooling water system 61 respectively.
Among the above, cooling water system 61 includes the circulating pump and cooling control system connecting with cooling water pipe 10, wherein
Starting and operating power of the cooling control system according to the order-driven circulating pump of PLC control system, to provide the cold of inequality
But water enters mold.
High-temperature insulation heating wire 7, the height in the upper mold core 1 and lower mold core 16 are equipped in the heating tank 5
Heating system 62 has been electrically connected in warm insulated heating wire 7.
Heating system 62 includes the heating power supply and heating control system being electrically connected with high-temperature insulation heating wire 7,
Starting and operating power of the middle heating control system according to the order-driven high-temperature insulation heating wire 7 of PLC control system, to provide
The heat of inequality enters mold
Upper mold temperature sensor 8 and lower die temperature sensor 9 are electrically connected with PLC control system 6, the PLC control
System 6 and cooling water system 61, heating system 62 are electrically connected, and the PLC control system 6 according to upper mold temperature sensor 8,
The temperature information control cooling water system 61 and heating system 62 that lower die temperature sensor 9 is fed back form closed-loop control
Upper mold temperature sensor 8 and lower die temperature sensor 9 are by the temperature value Real-time Feedback of upper mold core 4, lower mold core 13
Give PCL control system, temperature data adjusts start and stop and the cooling system of heating system 62 to PLC control system in real time based on the received
The flow of the cooling water of 61 supplies, is consequently formed closed-loop control, the profiling temperatures of upper mold core 4, lower mold core 13 is made to reach pre-
Time value.Compared with the existing technology, the long fiber reinforcement composite wood of GMT technique and LFT-D technique may be implemented in mold of the invention
The manufacture for expecting product can satisfy being evenly heated and cooling down for the intracavitary composite products of complicated die type, while not have oil liquid
Disclosure risk and discharging of waste liquid reduce environmental pollution, are conducive to the automation of production process.
In addition, the helical form or hollow heating tank 5 on the outside of upper mold core 4, lower mold core 13 can be equal according to product shape
Even distribution processing, processing cost be not high；High-temperature insulation heating wire 7 can be wanted according to upper mold core 4, the wall thickness of lower mold core 13 and technique
The multiple groups for being divided into different capacity are asked to carry out helical form or hollow heating tank 5 that arrangement is embedded in upper mold core 4,13 outside of lower mold core
It is interior, control is realized respectively, is advantageously implemented the uniformity of core temperature.
Corresponding guide-localization slot 1101 and guiding are respectively arranged on the opposite face of the upper die holder 1 and lower die holder 16
Positioning column 1102, upper die holder 1 and lower die holder 16 pass through guide-localization slot 1101 and guide-localization column respectively in the present embodiment
1102 corresponding engomphosis relations connect, due to being provided with guide-localization slot 1101 and guide-localization column 1102, so that upper mold
Seat 1 and lower die holder 16 can be accurately closed, in addition by being set in guide-localization column between upper die holder 1 and lower die holder 16
Pre- heat pad 11 is movably set on 1102.
Pre- heat pad 11 is arranged in this way can make preheating pad 11 flexibly take in upper die holder 1 and lower die holder 16
It is two aspects with the effect removed, and increase pre- heat pad in the present invention:
First, due to it is involved in the present invention be long fiber reinforcement composite material, in mold molding for temperature
Demand property it is relatively high, therefore need heating mould to reach before shaping can just to carry out mould within the scope of specified temperature
Otherwise it is different to will lead to composite material internal and external temperature for pressure；
Second, the heating system constructed in the present invention, due to being to be arranged inside mold core, and environment temperature wants low always
In the temperature of compression molding, therefore, the heating system inside model can not make entire mold reach by way of self-heating
Specified temperature range, and if directly carrying out heat-flash by internal heating system, inevitably result in the temperature of mould inside
Degree is more than the temperature of setting, influences the service life of conduction oil, also triggers cooling system and is cooled down for protection mold.
It is compared to the pre- heat pad of the prior art, the pre- heat pad in the present invention adapt to the improvement of this technique, specifically
Be as shown in Figure 2: pre- heat pad 11 includes heat collector panel 1103, and 1103 surface of heat collector panel is set and upper die holder 1 and lower die holder respectively
The temperature of 16 fitting contacts supports heating layer 1104, and the heat inside pre- heat pad effectively can be focused on surface by heat collector panel 1103
Come, this, which is achieved in that by using the high material of thermal coefficient, prepares heat collector panel, and since it is the good conductor of heat, temperature is more
Add and be transmitted as readily at this, avoids assembling excessive heat inside pre- heat pad and leading to over-heat inside.In heat collector panel 1103
The surface feeding heating layer 1104 of setting temperature is in order to save the heat on heat collector panel 1103, since heat collector panel 1103 is that the good of heat is led
Body, heat thereon can be easy for gathering together forming higher temperature, and it is slow that feeding 1104 one side of heating layer of temperature, which is arranged,
The high temperature of this moment is rushed, heat is first focused on the feeding heating layer 1104 of temperature to the temperature for stepping up the feeding heating layer 1104 of temperature,
Reach or more than setting temperature, thus formed a stable heat source mold is preheated.
In the present embodiment, it is also necessary to explanation, the feeding heating layer 1104 of temperature are made of the higher material of specific heat capacity,
To guarantee that it is always stable heat source, it is the non-conductor of heat since mold is for other components, needs prolonged
Temperature, which is supported, can make mold be heated to specified temperature.
In addition, in the present invention also emphatically in view of the difference of upper mold core and lower mold core, therefore in the heat collector panel 1103
The internal partition by being fixedly mounted is divided into upper chamber and lower chambers, and is separately installed in the upper chamber and bottom chamber portion
The mutually independent secondary electric heating wire 1105 arranged in the shape of a spiral, the secondary electric heating wire 1105 arranged in the shape of a spiral can be just
In internal heat diffusion to surface, to heat heat collector panel in most fast speed, additionally by two groups of secondary electric heating wires
1105 respectively heat its above and below, and two groups of secondary heater strips are then connected with the peripheral hardware for being located at 1103 side of heat collector panel
Port 1106, the peripheral port 1106 are connected with heating system 62 by connecting line.
It is herein another innovative point of the invention, i.e., pre- heat pad is that heating is realized by identical control system
, the advantages of this arrangement are as follows, firstly, the construction of reduction device, can share a set control system, being secondly then can be straight
The identical parameter of female connector, without being once again set up the parameter of preheating, but can individually indicate heating system, according to setting
Fixed requirement floats to temperature, is highly beneficial for the heating of the temperature of two different phases.
Using the above structure, upper coldplate 3 and helical form on lower coldplate 14 or hollow sink 12 can be according to products
Shape is uniformly distributed processing, and processing cost is not high；Sink 12 forms upper and lower mould with upper thermal insulation board 2 and the closing of lower thermal insulation board 15 respectively
The cooling water channel of tool, the trend of water channel and section can carry out flexible design and processing according to the technological requirements, be advantageously implemented multiple
The consistency and raising production efficiency of composite product each section performance.
In addition, as shown in figure 3, the present invention also provides a kind of temprature control method of online shaping dies, including it is as follows
Step:
Step 100 opens die holder, and adds pre- heat pad between upper and lower die holder, and pre- heat pad is connect with heating system,
Start heating system and closed loop heater is carried out to pre- heat pad；
Step 200, when upper and lower die holder is heated to assigned temperature by pre- heat pad, be again turned on die holder and remove heating
Pad, starting heating system heat mold core and maintain preheating temperature；
Step 300 starts heating system to mold core progress closed loop heater temperature control in mold core after filling composite.
It carries out the preheating of closed-loop control to mold by pre- heat pad first in the present invention, temperature then is being carried out to mold
It supports, is intended to its internal and external temperature gradually identical, to meet the required internal and external temperature of present invention technical requirements all the same.
Specifically, in step 100, the specific steps of closure heating are carried out to pre- heat pad are as follows:
Temperature sensor is contacted with the fitting of upper and lower die holder respectively, and temperature detection signal is passed back in real time by step 101
PLC control system, synchronous averaging heating system；
Step 102, PLC control system according to temperature detection signal to heating system issue heating signal, to pre- heat pad into
Row heating is until upper and lower die holder surface temperature reaches designated value, and maintains the state is constant to continue 0.5~1 hour.
As previously described, in the present invention since the thermal conductance of mold is different from other assemblies, in order to guarantee mould
Tool needs to carry out mold prolonged temperature and supports, the temperature inside and outside it is made to be in one in a balanced temperature environment
A equilibrium state.
In order to support the temperature of mold in better state, after environment temperature locating for upper and lower die holder and preheating
Temperature selects different temperature to support heating layer, the Specific Principles of selection are as follows:
When environment temperature is lower than 20 DEG C, temperature of the heating rate less than 2 DEG C/min is selected to support heating layer, when environment temperature height
When 40 DEG C, heating rate is selected to support heating layer between 4 DEG C/min~6 DEG C/min temperature, when environment temperature is in 20 DEG C~40
When between DEG C, heating rate is selected to support heating layer between 2 DEG C/min~4 DEG C/min temperature；
When temperature after preheating is greater than 150 DEG C, the quantity of the feeding heating layer of temperature is no less than 3 layers, and temperature after preheating is not
When greater than 150 DEG C, the quantity of the feeding heating layer of temperature is 1~3 layer.
In addition, in step 300, to the closed loop heater temperature control method of mold core specifically:
Step 301 again contacts temperature sensor with the fitting of upper and lower die holder respectively, and temperature detection signal is real-time
Pass PLC control system, synchronous averaging heating system and cooling water system back；
Step 302, PLC control system issue temperature control to heating system and cooling water system according to temperature detection signal
Signal, the heating signal for issuing anxious heat to mold core first carry out anxious heat to mold core, when the temperature of mold core is more than set temperature
After 10%, the temperature currently set is reverted to；
Step 303, hereafter at interval of 1/6~1/4 period triggering primary heating pulse signal until the temperature of mold core is super
Cross the 5% of setting value.
Preheating and actual heating are combined in the present invention, and can effectively overcome in the prior art cannot to internal temperature
The defect for being evenly heated and cooling down, this is because: first, in the present invention by preheating so that the temperature inside and outside mold in the early stage
In consistent, make mold surface temperature higher than mould inside by pulse signal after mold temperature reaches consistent, set in this way
Setting is advantageous in that adapting to composite material has just entered influence of the mold to mold surface temperature field, so that temperature between the two will not
Too big fluctuation occurs；Second, in general, the temperature of mould inside with heating system and cooling water system closed loop control
System enables to internal temperature to be in a balanced state, but needs exist in view of in a mold due to technique
Limitation, the not every structure of mould inside can cover uniform heater strip and cooling water pipeline, therefore inevitable at certain
A little regions will have low-temperature space and high-temperature region, and in the present invention to solve the above-mentioned problems, low temperature is constructed in mould inside
Area, and high-temperature region is avoided, this is because low-temperature space can be heated by way of heat radiation in present embodiment, and by
The hot-spot caused by local heating then is responsible for cooling down to the region by cooling water system, by radiating and cooling down work
With guaranteeing that the temperature in each region is in equilibrium, so as to avoid needing to guarantee that mould inside temperature equalization needs to mold
It carries out drilling and adds the heating being distributed according to type chamber or cooling pipe.
The present invention, can be in relatively simple mode to progress temperature control inside and outside mold by above-mentioned temperature control mode
System, and there is stronger control action for the distribution of mold temperature field, mold surfaces externally and internally can be effectively ensured and be in
With the consistency of each position performance of product after satisfaction molding within the scope of balanced temperature.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.
Claims (10)
1. a kind of online shaping dies of long fiber reinforcement composite material, including the upper die holder (1) that is mounted on press top shoe and
The lower die holder (16) being installed on the workbench, which is characterized in that be separately installed in the upper die holder (1) and lower die holder (16)
Upper thermal insulation board (2) and lower thermal insulation board (15), and upper mold temperature is separately installed in the end of the upper die holder (1) and lower die holder (16)
Spend sensor (8) and lower die temperature sensor (9)；
Upper thermal insulation board (2) inner surface is equipped with upper mold core (4), and is equipped between the upper thermal insulation board (2) and upper mold core (4)
The upper coldplate (3) being in close contact, lower thermal insulation board (15) inner surface are equipped with lower mold core (13), and in the lower thermal insulation board
(15) the lower coldplate (14) being in close contact is equipped between lower mold core (13)；
The heating tank (5) of helical form or hollow, the upper coldplate are equipped on the outside of the upper mold core (4) and lower mold core (13)
(3) and on lower coldplate (14) it is equipped in the shape of a spiral or the sink of hollow (12).
2. a kind of online shaping dies of long fiber reinforcement composite material according to claim 1, which is characterized in that the water
Cooling water pipe (10) are equipped in slot (12), the cooling water pipe being located in the upper coldplate (3) and lower coldplate (14)
(10) cooling circuit for forming circulation is connected to cooling water system (61) respectively.
3. a kind of online shaping dies of long fiber reinforcement composite material according to claim 2, which is characterized in that described to add
High-temperature insulation heating wire (7) are equipped in heat channel (5), the high-temperature insulation being located in the upper mold core (4) and lower mold core (13)
Heating system (62) have been electrically connected in heating wire (7).
4. a kind of online shaping dies of long fiber reinforcement composite material according to claim 3, which is characterized in that on described
Mould temperature sensor (8) and lower die temperature sensor (9) are electrically connected with PLC control system (6), the PLC control system
(6) it is electrically connected with cooling water system (61), heating system (62), and the PLC control system (6) is according to upper mold temperature sensing
Device (8), temperature information control cooling water system (61) of lower die temperature sensor (9) feedback and heating system (62) form closed loop
Control.
5. a kind of online shaping dies of long fiber reinforcement composite material according to claim 1, which is characterized in that described
Corresponding guide-localization slot (1101) and guide-localization column are respectively arranged on upper die holder (1) and the opposite face of lower die holder (16)
(1102), and the pre- heat pad (11) being set on guide-localization column (1102) is equipped between upper die holder (1) and lower die holder (16).
6. a kind of online shaping dies of long fiber reinforcement composite material according to claim 5, which is characterized in that described pre-
Heat pad (11) includes heat collector panel (1103), and heat collector panel (1103) surface is respectively equipped with and upper die holder (1) and lower die holder (16)
The temperature of fitting contact supports heating layer (1104), is divided into upper chamber in the internal partition by being fixedly mounted of the heat collector panel (1103)
And lower chambers, and be separately installed with the mutually independent secondary electrical arranged in the shape of a spiral in the upper chamber and bottom chamber portion and add
Heated filament (1105), two groups of secondary electric heating wires (1105) are connected with the peripheral port (1106) for being located at heat collector panel (1103) side,
The peripheral port (1106) is connected with heating system (62) by connecting line.
7. a kind of temperature controlling party of the online shaping dies of long fiber reinforcement composite material as claimed in any one of claims 1 to 6
Method, which comprises the steps of:
Step 100 opens die holder, and adds pre- heat pad between upper and lower die holder, and pre- heat pad is connect with heating system, starts
Heating system carries out closed loop heater to pre- heat pad；
Step 200, when upper and lower die holder is heated to assigned temperature by pre- heat pad, be again turned on die holder and remove heating cushion, open
Dynamic heating system, which heats mold core, maintains preheating temperature；
Step 300 starts heating system to mold core progress closed loop heater temperature control in mold core after filling composite.
8. a kind of temprature control method of online shaping dies of long fiber reinforcement composite material according to claim 7,
It is characterized in that, in step 100, the specific steps of closure heating is carried out to pre- heat pad are as follows:
Temperature sensor is contacted with the fitting of upper and lower die holder respectively, and temperature detection signal is passed back to PLC control in real time by step 101
System processed, synchronous averaging heating system；
Step 102, PLC control system issue heating signal to heating system according to temperature detection signal, add to pre- heat pad
Heat is until upper and lower die holder surface temperature reaches designated value, and maintains the state is constant to continue 0.5~1 hour.
9. a kind of temprature control method of online shaping dies of long fiber reinforcement composite material according to claim 8,
It is characterized in that, selects different temperature to support heating layer according to environment temperature locating for upper and lower die holder and the temperature after preheating, selection
Specific Principles are as follows:
When environment temperature is lower than 20 DEG C, temperature of the heating rate less than 2 DEG C/min is selected to support heating layer, when environment temperature is higher than 40
DEG C when, select heating rate between 4 DEG C/min~6 DEG C/min temperature support heating layer, when environment temperature be in 20 DEG C~40 DEG C it
Between when, select heating rate between 2 DEG C/min~4 DEG C/min temperature support heating layer；
When temperature after preheating is greater than 150 DEG C, the quantity of the feeding heating layer of temperature is no less than 3 layers, and temperature after preheating is not more than
At 150 DEG C, the quantity of the feeding heating layer of temperature is 1~3 layer.
10. a kind of temprature control method of online shaping dies of long fiber reinforcement composite material according to claim 7,
It is characterized in that, in step 300, to the closed loop heater temperature control method of mold core specifically:
Step 301 again contacts temperature sensor with the fitting of upper and lower die holder respectively, and temperature detection signal is passed back in real time
PLC control system, synchronous averaging heating system and cooling water system；
Step 302, PLC control system issue temperature control letter to heating system and cooling water system according to temperature detection signal
Number, the heating signal for issuing anxious heat to mold core first carries out anxious heat to mold core, when the temperature of mold core is more than the 10% of set temperature
Afterwards, the temperature currently set is reverted to；
Step 303, hereafter at interval of 1/6~1/4 period triggering primary heating pulse signal until the temperature of mold core is more than to set
The 5% of definite value.
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| CN201910762392.8A CN110480986A (en) | 2019-08-19 | 2019-08-19 | A kind of online shaping dies of long fiber reinforcement composite material and temprature control method |
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| CN112606436A (en) * | 2020-12-10 | 2021-04-06 | 中机精密成形产业技术研究院（安徽）股份有限公司 | Full-automatic production line for composite materials and control method thereof |
| CN113134592A (en) * | 2020-01-17 | 2021-07-20 | Ykk株式会社 | Die casting device |
| CN113524607A (en) * | 2021-09-16 | 2021-10-22 | 南通众翔模具科技有限公司 | Mold temperature detection system |
| CN114074396A (en) * | 2021-11-05 | 2022-02-22 | 刘伟 | Integrated Epp steering wheel based on self-cooling foaming molding |
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