CN209350913U - Thermoplasticity is punched hot pressing die certainly - Google Patents
Thermoplasticity is punched hot pressing die certainly Download PDFInfo
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- CN209350913U CN209350913U CN201822087511.8U CN201822087511U CN209350913U CN 209350913 U CN209350913 U CN 209350913U CN 201822087511 U CN201822087511 U CN 201822087511U CN 209350913 U CN209350913 U CN 209350913U
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Abstract
The utility model provides a kind of thermoplasticity from being punched hot pressing die, including upper die and lower die, upper cavity is set in the upper mold, lower mode cavity is set in the lower die, the upper mold and the lower die dock to form die cavity, thermoregulation mechanism is set in the side wall of the upper mold and the lower die, and the inside of the lower mode cavity is equipped with the cutter being bonded with the lower mode cavity side wall.The thermoplasticity can use thermoplastic continuous fibers prepreg manufacture vehicle beam from punching hot pressing die, improve the production efficiency of vehicle beam.
Description
Technical field
The utility model relates to molding die fields, and in particular to a kind of thermoplasticity is from being punched hot pressing die.
Background technique
Traditional vehicle beam is metallic plate punching forming, since crossbeam both ends change in shape is larger, cannot once be rushed
Pressure is completed, and what is taken at present is both ends and intermediate punching press respectively, is then welded.The drawbacks of traditional forming mode is punching press
Mold cost is high, later period welding process flow is more.And thermosetting polymer material stiffness and in terms of it is many
Advantage makes it be used widely in the fields such as Aeronautics and Astronautics and military project.
But thermosetting polymer has the shortcomings that be difficult to recycle, although this disadvantage is in the height of its composite material
End application field is not obvious, but just becomes huge challenge in the huge automotive field of dosage, especially more next
More Considering Environmental energy-efficient today.Also, the forming process of same with thermosetting compound material is a chemical process, too long solidification
Journey directly influences the production efficiency and production cost of product, and therefore, production efficiency is also puzzlement same with thermosetting compound material in vapour
One critical bottleneck of vehicle industrial application.
The preparation of thermoplasticity carbon fibre composite and forming process are a physical processes, with thermosetting property carbon fiber composite
Material is compared, and first advantage is reusable, reshaping；Second advantage is the impact flexibility for increasing composite material,
In some cases, the impact flexibility of thermoplastic composite is 10 times of same with thermosetting compound material；Third advantage is molding effect
Rate is high.
Currently, thermoplastic fibre enhanced article is mainly the injection or compression molding of discontinuous fiber, increase in this kind of product
Body fiber is non-continuously distributed by force, and strength and stiffness are much smaller than continuous fiber composite material, can not be applied to vehicle beam
In this kind of structural member.Due to the greatest differences of thermoplasticity and thermosetting resin rheological property, so that traditional thermosetting property is continuously fine
Dimension composite material process planning can not be applied in thermoplastic molding's technique.
Therefore, a kind of thermoplastic continuous fibers are studied from hot pressing die is punched, realize thermoplastic continuous fibers composite material
A near net high efficiency of forming, so that it is used for automobile industry, the production efficiency and environmental protection and energy saving for automobile industry have weight
Want meaning.
Utility model content
The purpose of this utility model is in view of the deficiencies of the prior art, to provide a kind of thermoplasticity from being punched hot-die
Tool.
To achieve the goals above, the technical scheme adopted by the utility model is
Upper cavity, the lower die is arranged in the upper mold from hot pressing die, including upper die and lower die are punched in a kind of thermoplasticity
Interior setting lower mode cavity, the upper mold and the lower die dock to form die cavity, the interior setting of the upper mold and the lower die
Thermoregulation mechanism, the lower mode cavity are internally provided with the cutter being bonded with the lower mode cavity side wall.
Based on above-mentioned, if the thermoregulation mechanism includes uniformly being arranged in the upper mold and the lower die interior
Dry X mutually hangs down to pipeline, several Y-direction pipelines and several Z-direction pipelines, the X to pipeline, the Y-direction pipeline and the Z-direction pipeline
Straight and interconnected, each X is equidistant to pipeline and cavity surface.
Based on above-mentioned, each X is opened on described to the wherein one end of pipeline, the Y-direction pipeline and the Z-direction pipeline
In upper mold and the lower die outer wall, the X is equipped with valve to the opening of pipeline, the Y-direction pipeline and the Z-direction pipeline.
Based on above-mentioned, the cutter is block insert type cutter.
Based on above-mentioned thermoplasticity from hot pressing die is punched, it further includes guiding mechanism, and the guiding mechanism includes being set to
Several vertical guide posts and self-lubricating surface of the lower die, the upper mold correspond to the vertical guide post setting vertical guide, it is described on
When mould and the lower die are docked, the vertical guide post is protruded into the vertical guide, and the self-lubricating surface is interior with the upper mold
Wall is affixed.
Based on above-mentioned thermoplasticity from being punched hot pressing die, further include be set to the lower die bottom several liftout holes and
The liftout core in the corresponding liftout hole.
It further include pressure-bearing upper mold cover board and pedestal based on above-mentioned thermoplasticity from hot pressing die is punched.
A kind of thermoplasticity is punched the application method of hot pressing die certainly, comprising the following steps:
Thermoplastic continuous fibers prepreg is first subjected to laying, is then preheated to temperature higher than the thermoplastic continuous fibers
The melting temperature of prepreg；The thermoplastic continuous fibers prepreg after preheating is placed in the lower mode cavity, on described
Mould and the lower die are molded in the case where heating pressurized conditions, and heat-insulation pressure keeping 1min is carried out after molding；Then the cooling 3- of pressure maintaining
4min temperature into die cavity is lower than the glass transition temperature of the thermoplastic continuous fibers prepreg, is demoulded.
Wherein, the thermoplastic continuous fibers prepreg, which refers to, impregnates continuous fiber with thermoplastic resin, is made
Thermoplastic resin and continuous fiber composition.
Based on above-mentioned, the step of the molding in, the closure pressing speed for molding initial stage is maximum, as closure pressing speed reduces, closes
Molding pressure is gradually increased.
The utility model has substantive features and progress compared with the prior art, specifically, the utility model have with
Lower advantage:
The utility model provides a kind of thermoplasticity from hot pressing die is punched, and it is pre- which can use thermoplastic continuous fibers
Leaching material manufactures vehicle beam, and vehicle beam made from thermoplastic continuous fibers prepreg is realized than metal beam loss of weight 46%
Vehicle beam product lightweight, meanwhile, the entire forming process of vehicle beam lasts 5 minutes or so, has fully demonstrated thermoplasticity
The composite molding period is short, is suitble to the advantage of large-scale production, effectively improves the manufacture efficiency of vehicle beam.
Specifically, thermoregulation mechanism and cutter are arranged in mold, by thermoregulation mechanism to die cavity carry out heating and
Cooling, thermoplastic continuous fibers prepreg energy local flow can be guaranteed by carrying out heating, be completed convenient for the cutter to product wheel
Wide cuts, and also makes that product molding is fuller, product surface is bright and clean smooth, and carrying out cooling can make moulded products cool down rapidly,
Shorten the manufacturing cycle.
In addition, the thermoregulation mechanism includes several interconnected X to pipeline, Y-direction pipeline and Z-direction pipeline, formed
X, the three-dimensional heating in tri- directions Y, Z, realizes the rapid heat cycle of mold cavity, not only can be shortened molding cycle, but also can reduce product
Buckling deformation after depanning；And each X being equidistant to pipeline and cavity surface, then be conducive to carry out die cavity uniformly plus
Hot or uniform cooling；Further, each X is opened on the upper mold and institute to the wherein one end of pipeline, Y-direction pipeline and Z-direction pipeline
It states on the outer wall of lower die, each X is equipped with valve to the opening of pipeline, Y-direction pipeline and Z-direction pipeline, by adjusting each valve
Switch can also carry out temperature adjusting to the different location of die cavity, make more to refine the temperature control of die cavity.
Further, in order to facilitate the maintenance of cutter and replacement, cutter is designed using block insert type；In order to avoid due to product at
Type pressure greatly and the inconsistency of each portion structure of product, leads to mold each site pressure difference, so that occurring in clamping process
Offset, guiding is realized using self-lubricating surface and guide post dual-guiding structure, sufficiently ensures the stability of clamping process.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that thermoplasticity is punched hot pressing die certainly in the utility model embodiment.
Fig. 2 is the structural schematic diagram of upper mold described in Fig. 1.
Fig. 3 is distribution schematic diagram of the X described in Fig. 2 to pipeline.
Fig. 4 is the diagrammatic cross-section of Fig. 2.
Fig. 5 is the structural schematic diagram of lower die described in Fig. 1.
Fig. 6 is the diagrammatic cross-section of Fig. 5.
Fig. 7 is the schematic cross-section of Fig. 1.
Fig. 8 is the internal pipeline schematic diagram of Fig. 5.
Fig. 9 is curve graph of the thermoplasticity from punching hot pressing die use process closure pressing speed and pressure change.
Figure 10 is that thermoplasticity is punched the folding that temperature and pressure parameter change over time in hot pressing die use process die cavity certainly
Line chart.
Figure 11 is the laying schematic diagram of thermoplasticity one-way tape CFR-TP PA6.
In figure: 1. lower dies；2. upper mold；3. pedestal；4. pressure-bearing upper mold cover board；5. cutter；6. liftout core；7. upper cavity；8.
Self-lubricating surface；9. lower mode cavity；10. vertical guide post；11. vertical guide；12.X is to pipeline；13.Y is to pipeline；14. cutting knife insert；
15. product；16.Z is to pipeline.
Specific embodiment
Below by specific embodiment, the technical solution of the utility model is described in further detail.
As shown in figures 1-8, a kind of thermoplasticity is arranged in the upper mold 2 from hot pressing die, including upper mold 2 and lower die 1 is punched
Upper cavity 7, the lower die 1 is interior to be arranged lower mode cavity 9, and the upper mold 2 and the docking of the lower die 1 form die cavity, the upper mold 2 and institute
It states and thermoregulation mechanism is set in the side wall of lower die 1, be provided in the lower mode cavity 9 and cut with what 9 side wall of lower mode cavity was bonded
Knife 5.In mold use process, the thermoregulation mechanism adjusts temperature for die cavity to be heated or cooled；Pass through temperature
Degree regulating mechanism carries out heating to die cavity and guarantees matrix plastic local flow, completes the sanction to product profile convenient for the cutter 5
It cuts, also makes that product molding is fuller, product surface is bright and clean smooth.
The thermoregulation mechanism includes several pipelines being uniformly arranged in the side wall of the upper mold 2 and the lower die 1.
When needing to heat, pipeline connection hot steam is heated, and when needing cooling, pipeline connection cooling water is cooled down.Specifically, this
Thermoregulation mechanism described in embodiment includes uniformly being arranged in several X of 1 interior of the upper mold 2 and the lower die to pipe
Road 12, several Y-direction pipelines 13 and several Z-direction pipelines 16, the X is to pipeline 12, the Y-direction pipeline 13 and the Z to pipeline 16
It is mutually perpendicular to and is interconnected, form the three-dimensional heating in tri- directions X, Y, Z, realize the rapid heat cycle of mold cavity, can contract
Short molding cycle, and the buckling deformation after product depanning can be reduced.Each X is equidistant to pipeline 12 and cavity surface,
Be conducive to be evenly heated die cavity or uniformly cool down.
In addition, the X be opened on to the wherein one end of pipeline 12, the Y-direction pipeline 13 and the Z-direction pipeline 16 it is described
On 1 outer wall of upper mold 2 and the lower die, the X pacifies to the opening of pipeline 12, the Y-direction pipeline 13 and the Z-direction pipeline 16
Equipped with valve.When not needing that a certain region is heated or cooled, the pipeline in the region is directly disconnected, is greatly mentioned
The controllability of temperature adjustment process is risen.Preferably, the setting of pipeline can be opened directly in the side wall of the upper mold, the lower die
Hole forms pipeline and directly blocks the pipeline in the region when not needing that a certain region is heated or cooled.
Further for the maintenance and replacement for facilitating cutter 5, the cutter 5 is block insert type cutter, the tool of block insert type cutter
Body structural reference Fig. 7.
Due to the inconsistency that product molding needs to pressurize with each portion structure of product 15, lead to each site pressure of mold not
Together, therefore, in order to ensure the stability of clamping process, the thermoplasticity from punching hot pressing die further include guiding mechanism, it is described to lead
It include that several vertical guide posts 10 for being set to the lower die and self-lubricating surface 8, the upper mold correspond to the vertical guide post to mechanism
Vertical guide 11 is set, when the upper mold and the lower die are docked, the vertical guide post is protruded into the vertical guide, it is described from
Lubrication face and the inner wall of the upper mold are affixed.In the present embodiment, the self-lubricating surface 8 uses beryllium copper material, implements in others
The other materials with self-lubricating property can be used in example.
Further for being convenient in demoulding, which further includes the bottom for being set to the lower die from hot pressing die is punched
The liftout core 6 in several liftout holes and the corresponding liftout hole.
Convenient further for molding and pressurization, which further includes pressure-bearing upper mold cover board and bottom from hot pressing die is punched
Seat.
The present embodiment also provides the thermoplasticity from the application method for being punched hot pressing die comprising following steps:
Thermoplastic continuous fibers prepreg is first subjected to laying, is then preheated to temperature higher than the thermoplastic continuous fibers
The melting temperature of prepreg；The thermoplastic continuous fibers prepreg after preheating is placed in the lower mode cavity, on described
Mould and the lower die are molded in the case where heating pressurized conditions, and burn close time is less than 0.5min, and preferably 15s is carried out after molding
Heat-insulation pressure keeping 1min；Then the cooling 3-4min of pressure maintaining temperature into die cavity is lower than the glass of the thermoplastic continuous fibers prepreg
Change transition temperature, is demoulded.
Wherein, the thermoplastic continuous fibers prepreg, which refers to, impregnates continuous fiber with thermoplastic resin, is made
Thermoplastic resin and continuous fiber composition.
Preferably, in the step of molding, the closure pressing speed for molding initial stage is maximum, as closure pressing speed reduces, molding
Pressure is gradually increased.Clamping process first quick and back slow, can guarantee that thermoplastic continuous fibers prepreg thermal loss is small early period, the later period fastly
It is slow then after can guaranteeing mold contacting thermoplastic continuous fiber prepreg, thermoplastic continuous fibers prepreg is sent out with mold shape
The Curvature varying in raw tri- directions X, Y, Z avoids continuous fiber that damage occurs, breaks.
Specifically, the thermoplastic continuous fibers prepreg that the present embodiment uses is 6 one-way tape of carbon fiber reinforced nylon
(CFR-TP PA6) manufactures vehicle beam from punching hot pressing die by the thermoplasticity, the performance parameter of CFR-TP PA6 referring to
Table 1.When manufacturing vehicle beam as raw material using CFR-TP PA6, closure pressing speed and pressure change relationship are referring to Fig. 9, in die cavity
Temperature, pressure are changed over time referring to Figure 10, by Fig. 9 and Figure 10 it is found that CFR-TP PA6 undergoes hot pressing, heat preservation to protect in die cavity
Pressure, cooling three processes of pressure maintaining, preheating temperature is 260 DEG C, and highest moulding pressure is 26MPa, and hot pressing time is 15s in mould, is protected
Warm pressure maintaining 1min, pressure maintaining cooling time are 3-4min, it should be noted that the specific temperature that the hot pressing, heat-insulation pressure keeping, pressure maintaining are cooling
Degree, pressure and time parameter are only for the CFR-TP PA6 in the present embodiment, in other examples, according to using thermoplasticity
The difference of continuous fiber prepreg, specific temperature, pressure and time parameter can be adjusted correspondingly.
About the Lay up design of CFR-TP PA6 one-way tape, is following laying balance and symmetry, determining fiber according to loading direction
On the basis of orientation and intersection principle of paving, 10 layers and 12 layers of two schemes are preferably laid with, optimize one-way tape paving by CAE analysis
Layer number and angle, final result are shown, when being laid with 10 layers, deformation of the vehicle beam obtained under specific operation is
0.14mm, and the deformation of metal beam is 0.38mm, shows that installation point rigidity is more than original when one-way tape is laid with 10 layers
Metallic stamping pieces, i.e., by thermoplasticity provided by the utility model from hot pressing die is punched, unidirectionally using carbon fiber reinforced nylon 6
Vehicle beam with manufacture can replace the vehicle beam shaped at present by metallic plate punching completely.
The performance parameter (fiber orientation directions) of 1 CFR-TP PA6 of table
In order to further prove to utilize thermoplastic material from hot pressing die is punched by thermoplasticity provided by the utility model
The performance of the vehicle beam of manufacture, use thermoplasticity one-way tape CFR-TP PA6 by fiber orientation angle for 0 °/90 ° /+45 °/0 °/-
45 °/- 45 °/0 ° /+45 °/90 °/0 ° of mode carries out laying, then laying schematic diagram utilizes the utility model referring to Figure 11
The thermoplasticity of offer manufactures vehicle beam from punching hot pressing die, and the vehicle beam product through manufacturing to the utility model is in difference
Position sampling, carries out Mechanics Performance Testing, test result referring to table 2, stretch modulus and tensile strength respectively reach 54GPa and
865MPa.As a comparison, table 2 gives the thermosetting property ring of resin transfer molding under identical ply sequence and content of carbon fiber simultaneously
Oxygen/carbon fibre composite the performance test results, and the sheet metal performance of former stamping crossbeam.It can by the comparison of table 2
Know, the thermoplastic composite vehicle beam of the utility model manufacture, the heat of performance and identical ply angles and content of carbon fiber
Solidity epoxy systems carbon fibre composite is substantially suitable, and specific stiffness and specific modulus are then much higher than the gold of former stamping crossbeam
Belong to plate.
2 different materials system mechanical property representative value of table
①②Note: the two ply sequence is identical with carbon fiber volume content
Finally it should be noted that: above embodiments are only to illustrate the technical solution of the utility model rather than limit it
System；Although the utility model has been described in detail with reference to the preferred embodiment, those of ordinary skill in the art should
Understand: specific implementation of the utility model can still be modified or is equally replaced to some technical characteristics
It changes；Without departing from the spirit of technical solutions of the utility model, should all cover in the claimed technical solution of the utility model
In range.
Claims (7)
1. a kind of thermoplasticity is punched hot pressing die, including upper die and lower die certainly, setting upper cavity in the upper mold, in the lower die
Lower mode cavity is set, and the upper mold and the lower die dock to form die cavity, it is characterised in that: the side wall of the upper mold and the lower die
Interior setting thermoregulation mechanism, the lower mode cavity are internally provided with the cutter being bonded with the lower mode cavity side wall.
2. thermoplasticity according to claim 1 is from being punched hot pressing die, it is characterised in that: the thermoregulation mechanism includes
Several X of the upper mold and the lower die interior are uniformly arranged in pipeline, several Y-direction pipelines and several Z-direction pipelines, institute
It states X and is mutually perpendicular to and is interconnected to pipeline, the Y-direction pipeline and the Z-direction pipeline, each X is to pipeline and cavity surface
Be equidistant.
3. thermoplasticity according to claim 2 is from being punched hot pressing die, it is characterised in that: each X is to pipeline, the Y
It is opened in the upper mold and the lower die outer wall to the wherein one end of pipeline and the Z-direction pipeline, the X is to pipeline, institute
The opening for stating Y-direction pipeline and the Z-direction pipeline is equipped with valve.
4. thermoplasticity according to claim 1-3 is punched hot pressing die certainly, it is characterised in that: the cutter is edge
Block formula cutter.
5. thermoplasticity according to claim 4 is punched hot pressing die certainly, it is characterised in that: it further include guiding mechanism, it is described
Guiding mechanism includes several vertical guide posts and self-lubricating surface for being set to the lower die, and the upper mold corresponds to the vertical guide post and sets
Vertical guide is set, when the upper mold and the lower die are docked, the vertical guide post is protruded into the vertical guide, the self-lubricating
Face and the inner wall of the upper mold are affixed.
6. thermoplasticity according to claim 5 is punched hot pressing die certainly, it is characterised in that: further include being set to the lower die
The liftout core in several liftout holes of bottom and the corresponding liftout hole.
7. thermoplasticity according to claim 5 or 6 is punched hot pressing die certainly, it is characterised in that: further include pressure-bearing upper mould cover
Plate and pedestal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822087511.8U CN209350913U (en) | 2018-12-13 | 2018-12-13 | Thermoplasticity is punched hot pressing die certainly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822087511.8U CN209350913U (en) | 2018-12-13 | 2018-12-13 | Thermoplasticity is punched hot pressing die certainly |
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| Publication Number | Publication Date |
|---|---|
| CN209350913U true CN209350913U (en) | 2019-09-06 |
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| CN201822087511.8U Active CN209350913U (en) | 2018-12-13 | 2018-12-13 | Thermoplasticity is punched hot pressing die certainly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109353034A (en) * | 2018-12-13 | 2019-02-19 | 郑州大学 | Thermoplasticity is punched hot pressing die and its application method certainly |
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2018
- 2018-12-13 CN CN201822087511.8U patent/CN209350913U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109353034A (en) * | 2018-12-13 | 2019-02-19 | 郑州大学 | Thermoplasticity is punched hot pressing die and its application method certainly |
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