CN208879678U - A kind of composite material heat-radiating substrate vacuum pressure infiltration molding die - Google Patents
A kind of composite material heat-radiating substrate vacuum pressure infiltration molding die Download PDFInfo
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- CN208879678U CN208879678U CN201821475534.XU CN201821475534U CN208879678U CN 208879678 U CN208879678 U CN 208879678U CN 201821475534 U CN201821475534 U CN 201821475534U CN 208879678 U CN208879678 U CN 208879678U
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- radiating substrate
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Abstract
The utility model relates to a kind of composite material heat-radiating substrate vacuum pressure infiltration molding dies, belong to composite material heat-radiating substrate manufacturing technology field.The mold includes mutually matched upper die and lower die, upper mold includes upper mould fixed plate, upper mold core, exhaust backing plate and die pad, setting exhaust backing plate between upper mould fixed plate and upper mold core, it is to be fixedly connected between upper mould fixed plate or upper mold core and exhaust backing plate, die pad is set to above upper mould fixed plate, liftout column is set on die pad, is respectively provided with and the matched circular hole of liftout column in upper mould fixed plate, exhaust backing plate and upper mold core；Lower die includes lower mold fixed plate and lower mode cavity, is fixedly connected between lower mold fixed plate and lower mode cavity, and topping channel is arranged in lower mode cavity.Mould structure design is rationally, easy for assemble or unload, and processing and manufacturing is at low cost, can complete the disposable newly net forming of composite material heat-radiating substrate using the mold, and infiltration uniform in effect is abundant, and subsequent machining is few, it is easy to accomplish scale industrial production.
Description
Technical field
The utility model belongs to composite material heat-radiating substrate manufacturing technology field, is related specifically to a kind of composite material heat dissipation
Substrate vacuum pressure infiltration molding die.
Background technique
As the power and integrated level of integrated circuit improve, the calorific value of chip unit area is also increasing.Simultaneously
With developing for high power module, heat dissipation problem is one of the lethal factor for influencing its function life-span, therefore is solved integrated
Circuit system heat dissipation problem most efficient method is using a kind of low thermal coefficient of expansion, high thermal conductivity coefficient, the Novel electric of light weight
Sub- encapsulating material.New Materials for Electric Packing is mainly composite material class, especially of greatest concern for example in metal-base composites
Include carbonization sial, diamond aluminum, diamond copper, graphitized alumina, graphite copper etc., wherein carbonization sial have again it is at low cost, after
Continue the obvious advantages such as the processing is simple.
Chinese patent CN205282468U discloses a kind of planform of heat-radiating substrate, heat-radiating substrate by bottom plate ontology and
N number of thermal column is constituted, but does not provide the machining manufacture of the planform heat-radiating substrate.Patent CN103700636A
It discloses a kind of heat-radiating substrate of similar structures shape and proposes its manufacturing method, but heat-radiating substrate is all by metal material system
At, not provide composite material heat-radiating substrate machining manufacture.It is next that these cannot provide a kind of composite material heat-radiating substrate
Effectively solve large scale integrated circuit system and high power density device heat dissipation problem.
Utility model content
For this purpose, the utility model people devises a kind of composite material structure of heat dissipation substrate, bottom plate uses composite material, heat dissipation
Column uses metal material, and for a kind of disposable near-net forming method of the mechanical development.In entire process procedure, shaping mould
Tool design is one of them key technology, including mold material selection, fit clearance design, demolding structure design, exhaust clearance
Design, die life etc..
In view of the above-mentioned problems, the utility model provides a kind of composite material heat-radiating substrate vacuum pressure infiltration molding die,
The mold has reasonable in design, easy for assemble or unload, long service life, manufacturing cost low, it is easy to accomplish large-scale industrial
The features such as production.
To achieve the above object, the utility model takes following technical scheme:
A kind of composite material heat-radiating substrate vacuum pressure infiltration molding die, including mutually matched upper die and lower die,
Middle upper mold includes upper mould fixed plate, upper mold core, exhaust backing plate and die pad, and vent pads are arranged between upper mould fixed plate and upper mold core
Plate is to be fixedly connected between upper mould fixed plate and exhaust backing plate or between upper mold core and exhaust backing plate, and die pad is set to
Above mould fixed plate, liftout column is set on die pad, is respectively provided with and liftout column in upper mould fixed plate, exhaust backing plate and upper mold core
The circular hole matched；Lower die includes lower mold fixed plate and lower mode cavity, lower mold fixed plate be between the two with lower mode cavity be fixedly connected, wherein
Topping channel is arranged in lower mode cavity.
Upper mould fixed plate top is fixed on vacuum hydraulic press upper mold platform by clamping cap, and lower part passes through bolt and row
Air cushion plate is connected and fixed, and the circular hole of centre setting and the cooperation of liftout column enables liftout column to pass through, in die pad to moving down
Guiding role is played while dynamic ejection molded part.
Exhaust backing plate top is attached fixation by bolt and upper mould fixed plate, and lower part is carried out by bolt and upper mold core
It is connected and fixed, forms air discharge duct, with the matched circular hole of liftout column, the liftout column on die pad is passed through for centre setting.
Multiple (N >=300) tapered holes are arranged in upper mold core lower part, and for forming the thermal column of heat-radiating substrate, centre is set
Set with the matched circular hole of liftout column, when upper/lower die closed moulding, cooperation is sealed with the liftout column of die pad, in upper mold core
Gas vent is arranged in portion, is attached fixation by bolt and exhaust backing plate, forms air discharge duct between upper mold core and exhaust backing plate, wide
Degree is 0.1-1mm, guarantees that it is complete to fill type for thermal column in forming process.When upper/lower die closed moulding, upper mold core and lower mode cavity are protected
Clearance fit is held, to keep pressure to be infiltrated up to molten metal uniformly fully in precast body.
Die pad is made of 4 liftout columns and fixed plate, and wherein fixed plate top and vacuum hydraulic press liftout platform carry out
Connection, 4 liftout columns are fixedly connected on fixed plate lower part.
Lower mold fixed plate lower part is fixed on vacuum hydraulic press lower die platform by clamping cap, and top is by bolt under
Die cavity is attached fixation.
Lower mode cavity lower part is attached fixation by bolt and lower mold fixed plate, and wherein setting topping in lower mode cavity side is logical
Road.Upper mold core and the size of lower mode cavity are mutually matched, and form zero clearance cooperation.Before upper/lower die closure, first precast body is put into
In lower mode cavity, molten metal is flowed into lower mode cavity by topping channel.
When upper and lower mold closure, the fit clearance of upper mold core and lower mode cavity is zero；4 holes and die pad in upper mold core
Four liftout column fit clearances be zero.
Upper mould fixed plate, exhaust backing plate, die pad, lower mold fixed plate and lower mode cavity are all made of hot die steel and are made, on
Mold core is made of hot die steel or high-strength graphite.
After the completion of molding, upper/lower die separate after, die pad move down ejection molded part during, fixed plate with it is upper
Mould fixed plate centre bore carries out cooperation and plays guiding role.Die pad moves down while upper mold moves up, and can will form
Part is ejected completely by upper mold core.
Using the utility model mold, when carrying out the molding of composite material heat-radiating substrate vacuum pressure infiltration, precast body is placed
Into lower mode cavity, molten metal is injected in lower mode cavity, upper mold core is pressed into lower mode cavity simultaneously pressure maintaining for a period of time, and precast body completes gold
Belong to infiltration, while molding multiple (N >=300) and thermal column that bottom plate is integrated, complete composite material heat-radiating substrate it is close eventually at
Type.
The molding method of composite material heat-radiating substrate vacuum pressure infiltration is carried out using above-mentioned mold, is included the following steps:
After the completion of whole set of die and vacuum hydraulic press installation and debugging, release agent is sprayed in upper mold core outer surface and lower die inner cavity surface, then
Precast body is placed in lower mode cavity, mold and precast body be fully warmed-up and reach desired temperature, and molten metal is by pouring
Expect that channel flows into lower mode cavity, after the completion of topping, upper mold rapid decrease forms zero clearance cooperation in place, with lower mode cavity, reaches than pressure
To setting value and pressure maintaining for a period of time, be infiltrated up to molten metal uniformly fully in precast body, while molten metal is to upper mold
Core reversely charging, gas are sufficiently excluded by air discharge duct, mold multiple (N >=300) thermal columns of heat-radiating substrate, after the completion of molding,
Upper mold moves up, and molded part connects together with upper mold by deviating from lower mode cavity, while die pad moves down, and molded part is more
A (N >=300) thermal column is ejected completely by upper mold core, completes the disposable newly net forming of single piece of composite material heat-radiating substrate.
Wherein, the precast body includes silicon carbide, diamond and graphite etc., and metal material includes aluminium and its alloy, copper
And its alloy etc..The volume ratio of the precast body and metal (molten metal) is 50-80%.
Wherein, the preheating temperature of mold and precast body is 500-800 DEG C.Range than pressure is 50-100MPa, dwell time
For 15-25min.
Molding die is placed into vacuum pressure infiltration furnace, i.e., entire forming process is complete in vacuum pressure infiltration furnace
At.
The utility model has the advantages that:
1, mould structure design is rationally, easy for assemble or unload, fabricates at low cost.
2, the disposable newly net forming of composite material heat-radiating substrate, infiltration uniform in effect is abundant, and thermal column fills the closely knit no gas of type
Hole defect, subsequent machining cost are low.
3, topping, release agent are sprayed, are formed, demoulding each process flow automatic operation easy to accomplish, it is easy to accomplish
Scale industrial production.
4, composite material heat-radiating substrate thermal expansion coefficient is low, thermal coefficient is high, light weight, can effectively solve large-scale integrated
The heat dissipation problem of circuit, high power density device.
5, when carrying out the molding of composite material heat-radiating substrate vacuum pressure infiltration using the mold of the utility model, processing and manufacturing
Process flow is short, disposable near-net forming, subsequent amount of machining is few, processing cost is low, is easily achieved large-scale production.
Detailed description of the invention
Fig. 1 is the utility model overall structure diagram.
Fig. 2 is the utility model overall structure diagrammatic cross-section.
Main appended drawing reference explanation:
1 upper mould fixed plate 2 is vented backing plate
3 upper mold core, 4 die pad
5 lower mode cavity, 6 lower mold fixed plate
7 topping channel, 8 air discharge duct
Specific embodiment
Below with reference to all attached drawings, the utility model is described in further detail.
The utility model preferred embodiment are as follows: the composite material heat-radiating substrate vacuum of the present embodiment as shown in Figure 1 and Figure 2
Pressure Infiltration molding die, including mutually matched upper die and lower die, wherein upper mold include upper mould fixed plate 1, upper mold core 3,
It is vented backing plate 2, die pad 4, lower die includes lower mold fixed plate 6, lower mode cavity 5, and wherein lower mode cavity 5 opens up topping channel 7.Liftout
Plate 4 is located at 1 top of upper mould fixed plate, setting exhaust backing plate 2, upper mould fixed plate 1 and row between upper mould fixed plate 1 and upper mold core 3
It is to be fixedly connected between air cushion plate 2 and between exhaust backing plate 2 and upper mold core 3.
Upper mold core 3 is shaped using high-strength graphite, and upper mold core 3 processes N number of tapered hole below, for forming heat dissipation base
N number of thermal column of plate, reprocesses 4 circular holes, when upper/lower die closed moulding, carries out zero clearances with 4 four liftout columns of die pad
Cooperation, processes gas vent above, is attached fixation by bolt and exhaust backing plate 2, and forming width below with exhaust backing plate 2 is 1mm
Air discharge duct 8, guarantee forming process in gas be smoothly discharged, thermal column fills the complete pore-free defect of type.Upper/lower die closes simultaneously
When synthesis type, upper mold core 3 and lower mode cavity 5 keep zero clearance cooperation.Four liftout columns in 4 holes and die pad 4 in upper mold core 3
Fit clearance is zero.Inventor has found by many experiments, if upper mold core 3 is under, it may appear that heating column aplasia etc. is asked
Topic.
Exhaust backing plate 2 is shaped using H13 steel, and exhaust backing plate 2 is attached by bolt and upper mould fixed plate 1 solid above
It is fixed, fixation is attached by bolt and upper mold core 3 below, air discharge duct 8 is formed, reprocesses out 4 circular holes, is used for die pad 4 four
Root liftout column passes through.
Upper mould fixed plate is machined after forming using hot die steel, is fixed to above upper mould fixed plate by 4 pieces of clamping caps
On vacuum hydraulic press upper mold platform, be attached below by bolt and exhaust backing plate 2, centre process hole and die pad 4 into
Row cooperation plays guiding role while die pad 4 moves down ejection molded part.
Die pad 4 is shaped using H13 steel, and You Sigen liftout column and fixed plate are constituted, wherein above fixed plate and very
Null oil-pressure machine liftout platform is attached, and is connected below four liftout columns and fixed plate.After the completion of molding, upper/lower die is separated,
During die pad 4 moves down ejection molded part, fixed plate and 1 centre bore of upper mould fixed plate carry out cooperation and play guiding work
With.
Lower mold fixed plate 6 is machined after forming using H13 steel, and lower mold fixed plate 6 is fixed to vacuum by 4 pieces of clamping caps below
On hydraulic press lower die platform, fixation is attached by bolt and lower mode cavity 5 above.
Lower mode cavity 5 is shaped using H13 steel, and lower mode cavity 5 is attached fixation by bolt and lower mold fixed plate 6 below,
Wherein side opens up topping channel 7 and first silicon carbide precast body is put into lower mode cavity 5 before upper/lower die is closed, and melts fine aluminium
It is flowed into lower mode cavity 5 by topping channel 7, after closure, lower mode cavity 5 and upper mold core 3 keep zero clearance cooperation.
After the completion of whole set of die and vacuum hydraulic press installation and debugging, 3 outer surface of upper mold core and 5 inner surface spray oil of lower mode cavity
Base graphitic release agents, then silicon carbide precast body is placed in lower mode cavity 5, mold and precast body be fully warmed-up reaching 600
DEG C, melting fine aluminium by topping channel 7 flow into lower mode cavity 5 in, after the completion of topping, upper mold rapid decrease in place, with 5 shape of lower mode cavity
Cooperate at zero clearance, reach 50MP and pressure maintaining 20 minutes than pressure, is infiltrated up to melting fine aluminium uniformly fully in precast body, simultaneously
Upward 3 reversely charging of mold core of fine aluminium is melted, gas is sufficiently excluded by air discharge duct 8, and upper mold core 3 molds N number of heat dissipation of heat-radiating substrate
Column, after the completion of molding, upper mold is moved up, and silicon carbide aluminum cooling substrates connect together by deviating from lower mode cavity 5, simultaneously with upper mold
Die pad 4 moves down, and the N number of thermal column of silicon carbide heat-radiating substrate is ejected completely by upper mold core 3, completes single-piece carbonization sial and dissipates
The disposable newly net forming of hot substrate, using this, the formed in mould silicon carbide aluminum cooling substrates coefficient of expansion is low, thermal coefficient is high, matter
Amount is light, and subsequent machining is few, can effectively solve the heat dissipation problem of large scale integrated circuit or high power density device.
It can be seen that the design of the utility model mould structure is rationally, and it is easy for assemble or unload, fabricate at low cost, utilization
The mold can complete the disposable newly net forming of composite material heat-radiating substrate, and infiltration uniform in effect is abundant, and subsequent machining is few, each
Process flow automatic operation easy to accomplish, it is easy to accomplish scale industrial production.
Claims (10)
1. a kind of composite material heat-radiating substrate vacuum pressure infiltration molding die, it is characterised in that: including mutually matched upper mold
And lower die, the upper mold include upper mould fixed plate, upper mold core, exhaust backing plate and die pad, the upper mould fixed plate with it is upper
Setting exhaust backing plate between mold core is solid between the upper mould fixed plate and exhaust backing plate or between upper mold core and exhaust backing plate
Fixed connection, the die pad are set to above upper mould fixed plate, and liftout column is arranged on the die pad, and the upper mold is solid
It is respectively provided with and the matched circular hole of liftout column in fixed board, exhaust backing plate and upper mold core；The lower die includes lower mold fixed plate under
Die cavity is fixedly connected between the lower mold fixed plate and lower mode cavity, and topping channel is arranged in the lower mode cavity.
2. composite material heat-radiating substrate vacuum pressure infiltration molding die according to claim 1, it is characterised in that: described
Upper mould fixed plate top by clamping cap be fixed to vacuum hydraulic press upper mold platform on, lower part by bolt and exhaust backing plate
Connection, the circular hole of centre setting and the cooperation of liftout column.
3. composite material heat-radiating substrate vacuum pressure infiltration molding die according to claim 1, it is characterised in that: described
Exhaust backing plate top connect with upper mould fixed plate by bolt, lower part passes through bolt and connect with upper mold core, and centre is arranged
With the matched circular hole of liftout column.
4. composite material heat-radiating substrate vacuum pressure infiltration molding die according to claim 1, it is characterised in that: described
Upper mold core lower part multiple tapered holes, centre setting and the matched circular hole of liftout column, the setting exhaust of upper mold core top are set
Hole is connect by bolt with exhaust backing plate.
5. composite material heat-radiating substrate vacuum pressure infiltration molding die according to claim 4, it is characterised in that: described
Upper mold core and exhaust backing plate between form air discharge duct, width 0.1-1mm.
6. composite material heat-radiating substrate vacuum pressure infiltration molding die according to claim 1, it is characterised in that: described
Die pad be made of 4 liftout columns and fixed plate, the fixed plate top is connect with vacuum hydraulic press liftout platform, 4
Liftout column is fixedly connected on fixed plate lower part.
7. composite material heat-radiating substrate vacuum pressure infiltration molding die according to claim 1, it is characterised in that: described
Lower mold fixed plate lower part be fixed on vacuum hydraulic press lower die platform by clamping cap, top is connected by bolt and lower mode cavity
It connects.
8. composite material heat-radiating substrate vacuum pressure infiltration molding die according to claim 1, it is characterised in that: described
Lower mode cavity lower part connect with lower mold fixed plate by bolt, the lower mode cavity side setting topping channel.
9. composite material heat-radiating substrate vacuum pressure infiltration molding die according to claim 1, it is characterised in that: upper,
When lower mold is closed, the fit clearance of upper mold core and lower mode cavity is zero；Four liftout columns in 4 holes and die pad in upper mold core
Fit clearance is zero.
10. composite material heat-radiating substrate vacuum pressure infiltration molding die according to claim 1, it is characterised in that: institute
Upper mould fixed plate, exhaust backing plate, die pad, lower mold fixed plate and the lower mode cavity stated are all made of hot die steel and are made, upper mold core
It is made of hot die steel or high-strength graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821475534.XU CN208879678U (en) | 2018-09-10 | 2018-09-10 | A kind of composite material heat-radiating substrate vacuum pressure infiltration molding die |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821475534.XU CN208879678U (en) | 2018-09-10 | 2018-09-10 | A kind of composite material heat-radiating substrate vacuum pressure infiltration molding die |
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| CN208879678U true CN208879678U (en) | 2019-05-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109175312A (en) * | 2018-09-10 | 2019-01-11 | 有研工程技术研究院有限公司 | A kind of composite material heat-radiating substrate vacuum pressure infiltration molding die and forming method |
-
2018
- 2018-09-10 CN CN201821475534.XU patent/CN208879678U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109175312A (en) * | 2018-09-10 | 2019-01-11 | 有研工程技术研究院有限公司 | A kind of composite material heat-radiating substrate vacuum pressure infiltration molding die and forming method |
| CN109175312B (en) * | 2018-09-10 | 2024-04-12 | 有研工程技术研究院有限公司 | Vacuum pressure infiltration molding die and molding method for composite material radiating substrate |
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