CN105711113B - A kind of method for testing level RTM constant pressures injecting systems and constant pressure injection - Google Patents
A kind of method for testing level RTM constant pressures injecting systems and constant pressure injection Download PDFInfo
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- CN105711113B CN105711113B CN201610067131.0A CN201610067131A CN105711113B CN 105711113 B CN105711113 B CN 105711113B CN 201610067131 A CN201610067131 A CN 201610067131A CN 105711113 B CN105711113 B CN 105711113B
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- valve
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- vacuum tank
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a kind of method for testing level RTM constant pressures injecting systems and constant pressure injection, system is connected by easy vacuum meter, storage tank, vacuum tank, vavuum pump, flash collecting tank and pipeline with valve, realizes that RTM one-components constant pressure is injected.And dismounting is easy, it is easy to clean, while in injection process injection pressure can be adjusted by air compressor, the fast function of injection of constant current can be realized.Present system ability to provide the auxiliary items is strong, simple in construction, with low cost, dismounting and cleaning are convenient, it is adaptable to the shaping of factory, the testpieces of scientific research institutions and small piece.For the research of laboratory resin transfer moulding, small lot manufacture experimental piece reduces production cost, resin transfer molding (RTM) process is studied, while vacuum aided injection moulding can also be realized.
Description
Technical field
The invention belongs to RTM technical fields, it is related to a kind of method for testing level RTM constant pressures injecting systems and constant pressure injection,
By the universal products such as air compressor, vavuum pump and cylinder and part, realize that RTM one-components constant pressure is injected.
Background technology
At present, continuing to develop with resin base fiber reinforced composite material, occurs in that many low-cost manufacturing techniques, tree
Fat transfer modling (RTM) forming technique as resin base fiber reinforced composite material forming technique important branch, increasingly by
To the attention of domestic and foreign scholars, RTM techniques are a kind of mold closing technique, are that the resin of low viscosity is injected into pre- under pressure
Put in the mold cavity of reinforcing material, make resin complete wetting reinforcing material precast body, then pass through the mode tree such as constant temperature
Fat solidifies, so as to prepare the technique of material.At present because RTM techniques designability is strong, short molding cycle the features such as, so its quilt
It is widely used in Aero-Space, shipbuilding, the every field such as automobile industry.
RTM injection moulding methods and injecting systems have had more application, such as double-component injection system and single group at present
Part injecting systems, these systems can realize that low temperature constant voltage/constant current is injected.But current these device structures design is complicated, cost
Costliness, as domestic injection device price between 200,000-40 ten thousand, inlet device price is general all more than 700,000.With regard to mesh
For preceding injection device, injecting systems pipeline is oversize, and waste of material rate is high, and various pipe valves are also easily damaged, caused existing
The use cost of equipment is very high.These injection devices are not suitable for scientific research institutions and enterprise carries out the life of testpieces and small lot product
Production.
The content of the invention
The technical problem to be solved
In order to avoid the shortcomings of the prior art, the present invention proposes a kind of experiment level RTM constant pressures injecting systems and constant pressure
The method of injection, solves that injecting systems are with high costs, is not suitable for scientific research institutions and enterprise and carries out testpieces and small lot product
Production, the problems such as realizing the low cost of resin transfer moulding (RTM) forming process, simplicity, controllability, convenience.
Technical scheme
One kind experiment level RTM constant pressure injecting systems, it is characterised in that including air compressor 3, vavuum pump 8, storage tank 13,
Vacuum tank 6, storage tank three-way connection 2, vacuum tank three-way connection 15, vacuum tank four-way connection 16, pressure gauge 4, valve and flash
Collection device;The bottom of storage tank 13 is provided with the storage connected with tank by geat valve 14 by being screwed to connect mold gate, top soon
Batch can three-way connection 2;Other two reduction of fractions to a common denominator of storage tank three-way connection 2 does not connect the first valve of storage tank 11 and the valve of storage tank second
Door 12, the first valve of storage tank 11 is connected by twisting soon with air compressor 3, on the second valve of storage tank 12 and vacuum tank 6
The first valve of vacuum tank 10 is connected;The vacuum three-way connection 15 that the bottom of vacuum tank 6 is connected with tank, vacuum three-way connection 15 is in addition
Two reduction of fractions to a common denominators do not connect the first valve of vacuum tank 10 and the second valve of vacuum tank 9, and the second valve of vacuum tank 9 is received by twisting soon with flash
Collect tank 1 to be connected, flash collecting tank 1 is connected with mould rising head, the first valve of vacuum tank 10 by twisting and the valve of storage tank second soon
12 connections;Vacuum tank 6 provided with the four-way connection connected with tank, four-way connection one end connection pressure vacuum gauge, in addition two ends point
Not Lian Jie the valve 7 of vacuum tank the 3rd and the valve 5 of vacuum tank the 4th, the valve 7 of vacuum tank the 3rd by being screwed to connect vavuum pump 8 soon, very
The valve 5 of slack tank the 4th is connected by twisting soon with air;The connector of the flash collecting tank 1 is sealing structure.
A kind of method for carrying out constant pressure injection using the experiment level RTM constant pressures injecting systems, it is characterised in that step is such as
Under:
Step 1, mixed with resin and deaeration:
The pipeline for connecting geat valve 14 is inserted in the resin and curing agent for the ratio of preparing, the valve of vacuum tank the 3rd is opened
7th, the first valve of vacuum tank 10, the second valve of storage tank 12 and geat valve 14, simultaneously close off the valve 5 of vacuum tank the 4th, vacuum
The second valve of tank 9 and the first valve of storage tank 11;Then start vavuum pump, vacuum tank 6 is vacuumized with storage tank 13 so that be pre-
Resin after first mixing is inhaled into storage tank with curing agent under suction function by geat valve 14;
Geat valve 14 is closed after the completion of suction, when vacuum reaches production engineering specifications and maintains 15- in storage tank 13
20min carries out vacuum defoamation;Vacuum tank 6 also functions to cushioning effect in the process, prevents mixed resin from entering with curing agent
Enter and cause vavuum pump to damage into vavuum pump.
Mould is carried out after step 2, completion vacuum defoamation to vacuumize:
Geat valve 14 is closed, is connected storage tank 13 with mold gate by geat valve 14, storage tank second is closed
Valve 12 and the first valve of vacuum tank 10, while opening the second valve of vacuum tank 9, vavuum pump is persistently vacuumized, until flash is received
Vacuum reaches production engineering specifications and maintains 10-15min so that mould completes to vacuumize in collection tank 1;
Step 3, resin injection:
Mould is completed after vacuumizing, and starts air compressor, adjusts the pressure output value stabilization of air compressor in technique
The numerical value of design requirement, opens the first valve of storage tank 11 and geat valve 14, and resin just flows into mould under constant pressure effect
In tool, constant pressure injection is completed, continues to vacuumize mould in injection process.
After the completion of constant pressure injection, the cleaning of storage tank is carried out, preparation, cleaning step are provided for the injection of constant pressure next time
For:
After step (1), injection are completed, the pipeline being connected with geat is extracted, by the residual resin in storage tank and admittedly
Agent provides pressure by air compressor and discharges resin and curing agent;
Step (2), geat valve 14 is closed, by geat valve 14 by storage tank 13 and the jar of resin scavenger specially
Connection, opens the valve 7 of vacuum tank the 3rd, the first valve of vacuum tank 10, the second valve of storage tank 12 and geat valve 14, closes simultaneously
Close the valve 5 of vacuum tank the 4th, the second valve of vacuum tank 9 and the first valve of storage tank 11;Then start vavuum pump, cleaning agent is inhaled
Enter in storage tank;
Step (3), the first valve of unlatching storage tank 11 simultaneously close the second valve of storage tank 12, and starting air compressor will set
Fat scavenger specially is discharged from storage tank;
Many times of repeat step 2- steps 3, until storage tank is not with having resin to be completed for cleaning in valve.
Many times of the repeat step 2- steps 3 are 2~3 times.
Beneficial effect
A kind of method for testing level RTM constant pressures injecting systems and constant pressure injection proposed by the present invention, system passes through easy
Vacuum meter, storage tank, vacuum tank, vavuum pump, flash collecting tank and pipeline are connected with valve, realize that RTM one-components constant pressure is noted
Penetrate.And dismounting is easy, it is easy to clean, while in injection process injection pressure, Neng Goushi can be adjusted by air compressor
The existing fast function of injection of constant current.
Present system ability to provide the auxiliary items is strong, simple in construction, with low cost, dismounting and cleaning are convenient, it is adaptable to factory, scientific research
The shaping of the testpieces and small piece of institutes.For the research of laboratory resin transfer moulding, small lot manufacture experimental piece, drop
Low production cost, studies resin transfer molding (RTM) process, while vacuum aided injection moulding can also be realized.
The inventive method in operation, the vacuum of storage tank, vacuum tube, mould can be controlled simultaneously by vavuum pump
Degree, storing pot bottom is connected with valve, realizes that resin suction passes through same valve with discharge, simple in construction.Flash collecting tank
It is responsible for collecting the Excess resin of mould rising head outflow, is improved beneficial to technological parameter.
Brief description of the drawings
Fig. 1 present system schematic diagrames
1. the valve of 5. vacuum tank of flash collecting tank 2. storage tank three-way connection, 3. air compressor, 4. vacuum meter the 4th
6. the storing of 7. 10. the first valve of vacuum tank of the 3rd valve of vacuum tank 8. vavuum pump, 9. the second valve of vacuum tank of vacuum tank 11.
The vacuum tank four of 12. 15 vacuum tank three-way connection of storage tank the second valve 13. storage tank, 14. valve of the first valve of tank 16 is connected
Head.
Embodiment
In conjunction with embodiment, accompanying drawing, the invention will be further described:
The embodiment of the present invention is a kind of one-component constant pressure injection device, and it is mainly characterized by by including air compressor, true
Empty pump, storage tank, vacuum tank, vacuum meter, pressure gauge, valve, flash collection device, pipeline etc. constitute the RTM that the present invention is designed
Injection device.
Vacuum tank and storing jar structure are:Storage tank and vacuum tank are all cylinder on the whole, and tank deck and tank bottom are rectangular
Body is constituted, and is threaded mouth, will be connected by screwed hole inside and outside tank body.Storage tank is primarily used to store before the injection in advance
Mix resin and curing agent.The main function of vacuum tank is that the connection such as connection vavuum pump and storage tank is played in vacuum
Logical effect.
The material sucking port of resin realizes that design structure becomes simple, easy to operate with injection port using same valve.It is logical
Cross air compressor and produce constant pressure, infuse resin into mould, realize constant pressure injection, pressure is relatively stable, can meet
Production requirement.
Needed in the threaded connection connected with equal model between all valves and adapter, hole, its connection procedure
Band is wound, it is anti-locking apparatus seepage of resin in the course of the work that it, which is acted on, pipeline is connected by twisting soon, is characterized in
Easy disassembly, and good sealing effect.
Annexation is:The bottom of storage tank 13 by geat valve 14 by being screwed to connect mold gate soon, top be provided with
The storage tank three-way connection 2 of tank connection;Other two reduction of fractions to a common denominator of storage tank three-way connection 2 does not connect the first valve of storage tank 11 and storage
The second valve of batch can 12, the first valve of storage tank 11 by soon twist be connected with air compressor 3, the second valve of storage tank 12 with very
The first valve of vacuum tank 10 on slack tank 6 is connected;The vacuum three-way connection 15 that the bottom of vacuum tank 6 is connected with tank, vacuum three is connected
First 15 other two reduction of fractions to a common denominator does not connect the first valve of vacuum tank 10 and the second valve of vacuum tank 9, and vacuum tank the second valve 9 is by fast
Twist and be connected with flash collecting tank 1, flash collecting tank 1 is connected with mould rising head, the first valve of vacuum tank 10 passes through stubborn and storing soon
The second valve of tank 12 is connected;Vacuum tank 6 provided with the four-way connection connected with tank, four-way connection one end connection pressure vacuum gauge,
Other two ends connect the valve 7 of vacuum tank the 3rd and the valve 5 of vacuum tank the 4th respectively, and the valve 7 of vacuum tank the 3rd by being screwed to connect soon
Vavuum pump 8, the valve 5 of vacuum tank the 4th is connected by twisting soon with air;The connector of the flash collecting tank 1 is sealing structure.
Using testing, the step of level RTM constant pressures injecting systems carry out constant pressure injection is as follows:
Step 1, mixed with resin and deaeration:
The pipeline for connecting geat valve 14 is inserted in the resin and curing agent for the ratio of preparing, the valve of vacuum tank the 3rd is opened
7th, the first valve of vacuum tank 10, the second valve of storage tank 12 and geat valve 14, simultaneously close off the valve 5 of vacuum tank the 4th, vacuum
The second valve of tank 9 and the first valve of storage tank 11;Then start vavuum pump, vacuum tank 6 is vacuumized with storage tank 13 so that be pre-
Resin after first mixing is inhaled into storage tank with curing agent under suction function by geat valve 14;
Geat valve 14 is closed after the completion of suction, when vacuum reaches production engineering specifications and maintains 15- in storage tank 13
20min carries out vacuum defoamation;Vacuum tank 6 also functions to cushioning effect in the process, prevents mixed resin from entering with curing agent
Enter and cause vavuum pump to damage into vavuum pump.
Mould is carried out after step 2, completion vacuum defoamation to vacuumize:
Geat valve 14 is closed, is connected storage tank 13 with mold gate by geat valve 14, storage tank second is closed
Valve 12 and the first valve of vacuum tank 10, while opening the second valve of vacuum tank 9, vavuum pump is persistently vacuumized, until flash is received
Vacuum reaches production engineering specifications and maintains 10-15min so that mould completes to vacuumize in collection tank 1;
Step 3, resin injection:
Mould is completed after vacuumizing, and starts air compressor, adjusts the pressure output value stabilization of air compressor in technique
The numerical value of design requirement, opens the first valve of storage tank 11 and geat valve 14, and resin just flows into mould under constant pressure effect
In tool, constant pressure injection is completed, continues to vacuumize mould in injection process.
After the completion of constant pressure injection, the cleaning of storage tank is carried out, preparation, cleaning step are provided for the injection of constant pressure next time
For:
After step (1), injection are completed, the pipeline being connected with geat is extracted, by the residual resin in storage tank and admittedly
Agent provides pressure by air compressor and discharges resin and curing agent;
Step (2), geat valve 14 is closed, by geat valve 14 by storage tank 13 and the jar of resin scavenger specially
Connection, opens the valve 7 of vacuum tank the 3rd, the first valve of vacuum tank 10, the second valve of storage tank 12 and geat valve 14, closes simultaneously
Close the valve 5 of vacuum tank the 4th, the second valve of vacuum tank 9 and the first valve of storage tank 11;Then start vavuum pump, cleaning agent is inhaled
Enter in storage tank;
Step (3), the first valve of unlatching storage tank 11 simultaneously close the second valve of storage tank 12, and starting air compressor will set
Fat scavenger specially is discharged from storage tank;
2~3 step 2- steps 3 are repeated, storage tank is not with having resin to be completed for cleaning in valve.
Claims (4)
1. one kind experiment level RTM constant pressure injecting systems, it is characterised in that including air compressor (3), vavuum pump (8), storage tank
(13), vacuum tank (6), storage tank three-way connection (2), vacuum tank three-way connection (15), vacuum tank four-way connection (16), pressure gauge
(4), valve and flash collection device;By being screwed to connect mold gate soon, pushed up by geat valve (14) storage tank (13) bottom
Portion is provided with the storage tank three-way connection (2) connected with tank;Other two reduction of fractions to a common denominator of storage tank three-way connection (2) does not connect storage tank
One valve (11) and the valve of storage tank second (12), the valve of storage tank first (11) are connected by twisting soon with air compressor (3),
The valve of storage tank second (12) is connected with the valve of vacuum tank first (10) on vacuum tank (6);Vacuum tank (6) bottom is connected with tank
Vacuum three-way connection (15), other two reduction of fractions to a common denominator of vacuum three-way connection (15) do not connect the valve of vacuum tank first (10) and vacuum
The valve of tank second (9), the valve of vacuum tank second (9) is connected by twisting soon with flash collecting tank (1), flash collecting tank (1) and mould
Has rising head connection, the valve of vacuum tank first (10) is connected by twisting soon with the valve of storage tank second (12);Vacuum tank (6) be provided with
The vacuum tank four-way connection (16) of tank connection, vacuum tank four-way connection (16) one end connects pressure vacuum gauge, and two ends are distinguished in addition
The valve (7) of vacuum tank the 3rd and the valve (5) of vacuum tank the 4th are connected, the valve (7) of vacuum the 3rd by being screwed to connect vavuum pump soon
(8), the valve (5) of vacuum tank the 4th is connected by twisting soon with air;The connector of the flash collecting tank (1) is sealing structure.
2. a kind of utilize the method that the progress constant pressure injection of level RTM constant pressures injecting systems is tested described in claim 1, it is characterised in that
Step is as follows:
Step 1, mixed with resin and deaeration:
The pipeline for connecting geat valve (14) is inserted in the resin and curing agent for the ratio of preparing, the valve of vacuum tank the 3rd is opened
(7), the valve of vacuum tank first (10), the valve of storage tank second (12) and geat valve (14), simultaneously close off the valve of vacuum tank the 4th
Door (5), the valve of vacuum tank second (9) and the valve of storage tank first (11);Then vavuum pump is started, by vacuum tank (6) and storing
Tank (13) is vacuumized so that the resin after being pre-mixed is inhaled into curing agent under suction function by geat valve (14)
In storage tank;
Geat valve (14) is closed after the completion of suction, when storage tank (13) interior vacuum reaches production engineering specifications and maintains 15-
20min carries out vacuum defoamation;
Mould is carried out after step 2, completion vacuum defoamation to vacuumize:
Geat valve (14) is closed, is connected storage tank (13) with mold gate by geat valve (14), closing storage tank the
Two valves (12) and the valve of vacuum tank first (10), while opening the valve of vacuum tank second (9), vavuum pump is persistently vacuumized, directly
Production engineering specifications are reached to flash collecting tank (1) interior vacuum and maintain 10-15min so that mould completes to vacuumize;
Step 3, resin injection:
Mould is completed after vacuumizing, and starts air compressor, adjusts the pressure output value stabilization of air compressor in technological design
It is required that numerical value, open the valve of storage tank first (11) and geat valve (14), resin just flows into mould in the case where constant pressure is acted on
In tool, constant pressure injection is completed, continues to vacuumize mould in injection process.
3. the method that experiment level RTM constant pressures injecting systems carry out constant pressure injection according to claim 1, it is characterised in that:
After the completion of constant pressure injection, the cleaning of storage tank is carried out, preparation is provided for the injection of constant pressure next time, cleaning step is:
After step (1), injection are completed, the pipeline being connected with geat is extracted, pressure is provided by storing by air compressor
Residual resin in tank is discharged with curing agent;
Step (2), geat valve (14) is closed, by geat valve (14) by the tank of storage tank (13) and resin scavenger specially
Son connection, opens the valve (7) of vacuum tank the 3rd, the valve of vacuum tank first (10), the valve of storage tank second (12) and geat valve
(14) valve (5) of vacuum tank the 4th, the valve of vacuum tank second (9) and the valve of storage tank first (11), are simultaneously closed off;Then start
Vavuum pump, cleaning agent is sucked in storage tank;
Step (3), the unlatching valve of storage tank first (11) simultaneously close the valve of storage tank second (12), and starting air compressor will set
Fat scavenger specially is discharged from storage tank;
Repeat step (2) step (3) repeatedly, until there is no resin to be completed for cleaning in storage tank and valve.
4. the method that experiment level RTM constant pressures injecting systems carry out constant pressure injection according to claim 3, it is characterised in that:
Repeat step (2) step (3) is repeatedly 2~3 times.
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CN201610067131.0A CN105711113B (en) | 2016-01-30 | 2016-01-30 | A kind of method for testing level RTM constant pressures injecting systems and constant pressure injection |
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CN201610067131.0A CN105711113B (en) | 2016-01-30 | 2016-01-30 | A kind of method for testing level RTM constant pressures injecting systems and constant pressure injection |
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CN105711113B true CN105711113B (en) | 2017-10-10 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR102102765B1 (en) | 2018-09-27 | 2020-04-21 | (주)세원물산 | Vacuum and resin supplying sub-device for resin transfer molding and RTM complex mold system with the same |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110057737B (en) * | 2019-04-10 | 2021-09-03 | 中国科学院地质与地球物理研究所 | Fluid pressure supply device and method for providing constant pressure |
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CN1513663A (en) * | 2003-06-11 | 2004-07-21 | 哈尔滨工业大学 | Ultrasonic processing resin transfer moulding method and used apparatus |
CN1921996A (en) * | 2004-02-17 | 2007-02-28 | 东丽株式会社 | Rtm molding method and device |
CN101269548A (en) * | 2008-05-09 | 2008-09-24 | 天津工业大学 | Device and method for preparing composite material with resin transfer molding technique |
CN101439570A (en) * | 2008-12-26 | 2009-05-27 | 北京玻钢院复合材料有限公司 | Re-injection process and equipment for poured resin adhesive solution when discharging air bubbles during composite material RTM molding process |
CN104070686A (en) * | 2014-05-28 | 2014-10-01 | 航天材料及工艺研究所 | High-temperature RTM (resin transfer molding) integrated molding equipment |
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Patent Citations (5)
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CN1513663A (en) * | 2003-06-11 | 2004-07-21 | 哈尔滨工业大学 | Ultrasonic processing resin transfer moulding method and used apparatus |
CN1921996A (en) * | 2004-02-17 | 2007-02-28 | 东丽株式会社 | Rtm molding method and device |
CN101269548A (en) * | 2008-05-09 | 2008-09-24 | 天津工业大学 | Device and method for preparing composite material with resin transfer molding technique |
CN101439570A (en) * | 2008-12-26 | 2009-05-27 | 北京玻钢院复合材料有限公司 | Re-injection process and equipment for poured resin adhesive solution when discharging air bubbles during composite material RTM molding process |
CN104070686A (en) * | 2014-05-28 | 2014-10-01 | 航天材料及工艺研究所 | High-temperature RTM (resin transfer molding) integrated molding equipment |
Cited By (1)
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KR102102765B1 (en) | 2018-09-27 | 2020-04-21 | (주)세원물산 | Vacuum and resin supplying sub-device for resin transfer molding and RTM complex mold system with the same |
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