CN108749033B - General vacuum die-closing die for prefabricated reinforcing plate - Google Patents
General vacuum die-closing die for prefabricated reinforcing plate Download PDFInfo
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- CN108749033B CN108749033B CN201810919687.7A CN201810919687A CN108749033B CN 108749033 B CN108749033 B CN 108749033B CN 201810919687 A CN201810919687 A CN 201810919687A CN 108749033 B CN108749033 B CN 108749033B
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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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/36—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and impregnating by casting, e.g. vacuum casting
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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
- B29C70/54—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)
- Moulds For Moulding Plastics Or The Like (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
The invention provides a general vacuum mold closing die for forming a prefabricated reinforcing plate, which comprises an upper die, a lower die, a left partition plate, a right partition plate, a front partition plate, a rear partition plate, a positioning screw, a demolding screw, a positioning screw and an O-shaped sealing ring. The composite material forming of the prefabricated body reinforcing plate with different thickness is realized by changing the partition plates with different thickness, the parting surface adopts an upper, middle and lower split structure, the sealing problem that a plurality of cross sections of the complex structure are connected is solved, the fitting degree of the prefabricated body reinforcing body and the mould can be observed in the mould closing process, the deformation of the product after the forming is ensured, the stress is avoided in the mould releasing process, the surface smoothness is high, the defects of poor glue, rich resin and the like are avoided, and the flat plate mould is designed to be convex, so that the thickness of the plate is controlled on one hand; on the other hand, the rigidity of the die is improved, and more importantly, the impregnation compactness of the preform is improved, and the percentage content of fibers is increased.
Description
Technical Field
The invention relates to a preform reinforcing plate positioning device suitable for vacuum injection, in particular to a general vacuum mold closing die for molding a preform reinforcing plate.
Background
The prefabricated reinforced composite material has high specific strength and specific modulus, the prefabricated reinforced part is integrally woven and formed, the prefabricated part is impregnated and cured and formed in a vacuum resin injection mode, the product has high resin content, the phenomena of poor glue and rich resin cannot occur, and the surface is free from defects. In the product forming process, a key technology is the design of a die, the dimensional accuracy of the product is directly influenced, the resin mold filling path is realized, and the performance and quality of the product are ensured by the die. If the mold design has certain defects (such as strength, sealing, etc.), the adhesion between the resin and the fibers will be reduced, thereby deteriorating the surface quality and mechanical properties of the product, and more seriously, personnel injury accidents will occur. Therefore, the mold design is required to meet the requirements of structural member external dimensions, resin injection pressure, resin flowability, preform permeability, curing characteristics, mold opening and closing, and the like, and resin flow uniformity is considered.
For the prefabricated reinforcing plate composite material component forming die, a metal die can be used for forming, the designed time division molded surface is generally divided into an upper die structure and a lower die structure, an O-shaped sealing ring is placed in a groove on the contact surface of the upper die and the lower die, sealing is carried out by using the clamping force, and the surrounding bolts are clamped. The preform is soft and positioned in the groove of the lower die, and the injection is characterized in that the inner cavity surface of the die and the fabric cannot generate an edge channel, the defect of poor glue or rich resin and the like of a product can be caused by non-lamination, and the preform and the die are filled and positioned by putty strips. The structure can only be used for positioning and forming one product size, and in the demolding process, the product can only be taken out in a warping mode, and the product can be damaged due to demolding stress.
The other can adopt semi-rigid mould, one side is metal mould, and the other side adopts vacuum bag shaping, can solidify the shaping in the oven, can solidify the shaping on the hot press, and vacuum bag shaping profile product is coarse, can not take shape the surface of the goods that the precision is high, and product thickness hardly guarantees, needs to process again and guarantees dimensional accuracy, and the yield is low, to vacuum bag material, once can not reuse, comparatively extravagant.
Disclosure of Invention
The invention aims to provide a vacuum mold closing die for molding a prefabricated part reinforced variable-thickness composite material component, which solves the sealing problem that a plurality of sections of a complex structure are connected, can observe the fitting degree of the prefabricated part reinforced part and the die in the die closing process, ensures that a product is not deformed after being molded, is not stressed in the demolding process, has high surface smoothness, and has no defects of poor glue, rich resin and the like.
The technical scheme of the invention is as follows:
The invention provides a vacuum mold closing die which comprises an upper die, a lower die, a left partition plate, a right partition plate, a front partition plate, a rear partition plate, demolding screws, positioning screws, demolding holes, positioning holes, rectangular sealing grooves a, a glue outlet, positioning threaded holes, a glue injection port, an O-shaped sealing ring a, rectangular sealing grooves b and O-shaped sealing rings b. And the forming of the prefabricated body reinforcing plate composite materials with different thicknesses is realized by changing the partition plates with different thicknesses.
Wherein, the parting surface adopts an upper, middle and lower split type structure. Because the RTM die has the characteristics of good dimensional accuracy and no processing, the die positioning is important, and the flat die is designed to be convex, so that the thickness of the plate is controlled on one hand; on the other hand, the rigidity of the die is improved, and more importantly, the impregnation compactness of the preform is improved, and the percentage content of fibers is increased.
The upper die is a rectangular flat plate with a boss, a rectangular sealing groove a is arranged at the position, 10mm away from the outer edge of the boss, of the upper die, and the cross section of the upper die is rectangular and takes a rectangular shape. The sealing groove a is positioned on the butt joint surface contacted with the left baffle, the right baffle, the front baffle and the rear baffle. The four sides are provided with 12 positioning holes which are used for being connected with the holes of the front baffle plate, the rear baffle plate, the left baffle plate, the right baffle plate and the lower die. And 4 demoulding holes are also arranged at the four corners. One end of the long side of the upper die is provided with 3 glue outlets.
The left baffle, the right baffle, the front baffle and the rear baffle are of cuboid structures with conical surfaces. The contact surfaces of the left partition plate, the front partition plate and the rear partition plate are respectively provided with 2 sealing grooves b for installing O-shaped sealing rings b, and the cross section of each sealing groove is rectangular and in a straight shape. The right baffle, the front baffle and the rear baffle are respectively provided with 2 rectangular sealing grooves b for installing O-shaped sealing rings b, and the cross section of the right baffle is rectangular and is in a straight line shape. The left baffle, the right baffle, the front baffle and the rear baffle are respectively provided with 3 positioning holes in the contact surface direction of the upper die and the lower die for connecting with the corresponding hole sites of the upper die and the lower die. The lateral direction of left baffle is equipped with 2 locating holes for connect preceding baffle, back baffle, and the lateral direction of right baffle is equipped with 2 locating holes for connect preceding baffle, back baffle. The side direction of preceding baffle is equipped with 2 locating screw holes, and the side direction of back baffle is equipped with 2 locating screw holes.
The lower die is a rectangular flat plate with a boss. Four sides are provided with 12 positioning threaded holes. A rectangular sealing groove a is arranged at the position 10mm away from the outer edge of the boss, and the cross section of the rectangular sealing groove is rectangular and takes the shape of rectangle. The sealing groove a is positioned on the butt joint surface contacted with the left baffle, the right baffle, the front baffle and the rear baffle. One end of the long side of the lower die is provided with 1 glue injection port.
Connection relation: the frame structure is formed by connecting and fixing the positioning screws respectively penetrating through the positioning holes of the left partition plate and the right partition plate and the positioning screw holes of the front partition plate and the rear partition plate. The combined partition boards are sleeved on the lower die according to a certain direction, and the upper die is covered. The left baffle, the right baffle, the front baffle, the rear baffle and the lower die are combined into a cavity through 12 positioning screws penetrating through positioning holes of the left baffle, the right baffle, the front baffle and the rear baffle to be fixedly connected with positioning threaded holes of the lower die, the product is positioned, and the vacuum die-closing positioning device is realized through an O-shaped sealing ring. The structure is convenient to install and convenient to demould, and the product is not stressed and deformed in the demould process.
In the die assembly process, an O-shaped sealing ring on a partition plate is firstly manufactured, the sealing ring is measured for a certain size, an inclined opening is cut, the inclined opening of the sealing ring is directly overlapped up and down, glue is dispensed and fixed, and the sealing rings are respectively placed in sealing grooves corresponding to a left partition plate, a right partition plate, a front partition plate and a rear partition plate. And then manufacturing sealing rings arranged on the upper die and the lower die, directly cutting a certain size, directly lapping the bevel edge positions of the sealing rings up and down, fixing by dispensing, and respectively putting the sealing rings into corresponding sealing grooves of the upper die and the lower die.
The front partition plate and the rear partition plate are connected and fixed through the positioning holes of the left partition plate and the right partition plate respectively by 4 positioning screws to form a frame structure. Sleeving the combined partition plates on the lower die according to a certain direction, laying the fabric in a cavity formed by the lower die and the partition plates, and covering the upper die. The positioning holes of the left baffle plate, the right baffle plate, the front baffle plate and the rear baffle plate are connected and fixed with the lower die through 12 positioning screws. The sealing device is in direct butt joint with a sealing ring on the partition plate to seal in a compression mode, and is matched with a vacuum closed die cavity, and joints are respectively arranged at the glue injection port and the glue outlet. The mold has good sealing effect after detection.
In the demolding process, the positioning screws for fastening the front, rear, left and right partition boards are loosened, and then the demolding screws penetrate through the upper die to separate the upper die from the partition boards, so that the product can be taken out.
Furthermore, the forming of the prefabricated body reinforcing plate composite materials with different thicknesses is realized by replacing the partition plates with different thicknesses, and the partition plates can be replaced.
Furthermore, the outer frame is interlocked with the upper die boss and the lower die boss for positioning, so that the thickness dimension precision of the product is ensured.
Furthermore, the four corners of the upper die are provided with demoulding holes for separating the upper die from the partition plate.
Furthermore, the lower die is provided with a glue flowing groove, so that the glue solution can uniformly impregnate the fabric, and the glue flowing groove is positioned in the die cavity. The glue inlet is positioned in the glue flowing groove.
Furthermore, the high-temperature-resistant compression type 0 sealing rings on the front partition plate and the rear partition plate are in contact with the sealing rings on the upper die and the lower die, compression deformation is carried out to generate compression force to eliminate gaps, and the lengths of the end faces of the sealing rings, protruding out of the sealing grooves, of the two ends of the sealing rings, of the partition plate are 0.1-0.3mm, so that a vacuum closed die cavity is formed. Solves the problem of difficult demoulding, improves the production efficiency and reduces the rejection rate.
Further, the glue outlet is positioned on the upper die, the number of the glue outlet is 3, the glue injection port is positioned on the lower die, and the number of the glue outlet is 1.
Drawings
FIG. 1 is an assembled schematic view of an inventive preform reinforcing plate type vacuum mold closing positioning device;
FIG. 2 is a schematic diagram of the upper die;
FIG. 3 is a schematic view of the lower die;
FIG. 4 is a left bulkhead schematic;
FIG. 5 is a right separator plate schematic;
FIG. 6 is a schematic view of a front bulkhead;
FIG. 7 is a schematic view of a rear bulkhead;
In the figure: 1-upper die, 2-lower die, 3-left baffle, 4-right baffle, 5-front baffle, 6-back baffle, 7-demoulding screw, 8-set screw, 9-demoulding hole, 10-locating hole, 11-rectangular seal groove a, 12-glue outlet, 13-locating threaded hole, 14-glue injection port, 15-O-shaped seal ring a, 16-rectangular seal groove b and 17-O-shaped seal ring b.
Detailed Description
The invention is further illustrated by the following examples, but it is noted that the examples are disclosed to aid in a further understanding of the invention, but will be understood by those skilled in the art: various alternatives and modifications are possible without departing from the spirit and scope of the invention and the appended claims. Therefore, the invention should not be limited to the disclosed embodiments, but rather the scope of the invention is defined by the appended claims.
Examples:
The invention provides a vacuum mold closing positioning device for a prefabricated body reinforcing plate, which comprises an upper mold 1, a lower mold 2, a left partition plate 3, a right partition plate 4, a front partition plate 5, a rear partition plate 6, a demolding screw 7, a positioning screw 8, a demolding hole 9, a positioning hole 10, a rectangular sealing groove a11, a glue outlet 12, a positioning threaded hole 13, a glue injection port 14, an O-shaped sealing ring a15, a rectangular sealing groove b16 and an O-shaped sealing ring b17. The set of die is used for forming the 300x500x5mm prefabricated reinforced plate composite material.
The upper die 1 is a rectangular flat plate with a boss, a rectangular sealing groove a11 is arranged at the position, 10mm away from the outer edge of the boss, of the upper die, and the cross section of the upper die is rectangular and takes the shape of rectangle. The seal groove a11 is located at the abutting surface contacting the left bulkhead 3, the right bulkhead 4, the front bulkhead 5, and the rear bulkhead 6. Four sides are provided with 12 positioning holes 13 for connecting with the holes of the front baffle 5, the rear baffle 6, the left baffle 3, the right baffle 4 and the lower die 2. And 4 demoulding holes 9 are also arranged at four corners. One end of the long side of the upper die 1 is provided with 3 glue outlets 12.
The left baffle plate 3, the right baffle plate 4, the front baffle plate 5 and the rear baffle plate 6 are respectively of cuboid structures with conical surfaces, wherein 2 sealing grooves b16 for installing O-shaped sealing rings b17 are respectively arranged on the contact surfaces of the left baffle plate 3, the front baffle plate 5 and the rear baffle plate 6, and the cross section of each sealing groove is rectangular and in a straight shape. The right baffle 4, the front baffle 5 and the rear baffle 6 are respectively provided with 2 rectangular sealing grooves b16 provided with O-shaped sealing rings b17, and the cross section of the rectangular sealing grooves b16 is rectangular and is in a straight line shape. The contact surface directions of the left baffle plate 3, the right baffle plate 4, the front baffle plate 5 and the rear baffle plate 6 and the upper die 1 and the lower die 2 are respectively provided with 3 positioning holes 10 for connecting with corresponding hole sites of the upper die 1 and the lower die 2. The left baffle 3 is laterally provided with 2 locating holes 10 for connecting the front baffle 5 and the rear baffle 6, and the right baffle 4 is laterally provided with 2 locating holes 10 for connecting the front baffle 5 and the rear baffle 6. The lateral direction of the front partition plate is provided with 2 positioning threaded holes 13, and the lateral direction of the rear partition plate is provided with 2 positioning threaded holes 13.
The lower die 2 is a rectangular flat plate with a boss. Four sides are provided with 12 positioning threaded holes 13. A rectangular sealing groove a11 is arranged at the position 10mm away from the outer edge of the boss, and the cross section of the rectangular sealing groove is rectangular and takes the shape of a rectangle. The seal groove a11 is located at the abutting surface contacting the left bulkhead 3, the right bulkhead 4, the front bulkhead 5, and the rear bulkhead 6. One end of the long side of the lower die is provided with 1 glue injection port.
Connection relation: the frame structure is formed by connecting and fixing the positioning screws respectively penetrating through the positioning holes of the left partition plate and the right partition plate and the positioning screw holes of the front partition plate and the rear partition plate. The combined partition boards are sleeved on the lower die according to a certain direction, and the upper die is covered. The left baffle, the right baffle, the front baffle, the rear baffle and the lower die are combined into a cavity through 12 positioning screws penetrating through positioning holes of the left baffle, the right baffle, the front baffle and the rear baffle to be fixedly connected with positioning threaded holes of the lower die, the product is positioned, and the vacuum die-closing positioning device is realized through an O-shaped sealing ring. The structure is convenient to install and convenient to demould, and the product is not stressed and deformed in the demould process.
In the die assembly process, an O-shaped sealing ring on a partition plate is firstly manufactured, the sealing ring is measured for a certain size, an inclined opening is cut, the inclined opening of the sealing ring is directly overlapped up and down, glue is dispensed and fixed, and the sealing rings are respectively placed in sealing grooves corresponding to a left partition plate, a right partition plate, a front partition plate and a rear partition plate. And then manufacturing sealing rings arranged on the upper die and the lower die, directly cutting a certain size, directly lapping the bevel edge positions of the sealing rings up and down, fixing by dispensing, and respectively putting the sealing rings into corresponding sealing grooves of the upper die and the lower die.
The front partition plate and the rear partition plate are connected and fixed through the positioning holes of the left partition plate and the right partition plate respectively by 4 positioning screws to form a frame structure. Sleeving the combined partition plates on the lower die according to a certain direction, laying the fabric in a cavity formed by the lower die and the partition plates, and covering the upper die. The positioning holes of the left baffle plate, the right baffle plate, the front baffle plate and the rear baffle plate are connected and fixed with the lower die through 12 positioning screws. The sealing device is in direct butt joint with a sealing ring on the partition plate to seal in a compression mode, and is matched with a vacuum closed die cavity, and joints are respectively arranged at the glue injection port and the glue outlet. The mold has good sealing effect after detection.
In the demolding process, the positioning screws for fastening the front, rear, left and right partition boards are loosened, and then the demolding screws penetrate through the upper die to separate the upper die from the partition boards, so that the product can be taken out.
Claims (2)
1. The universal vacuum mold closing die for forming the prefabricated body reinforcing plates is characterized by comprising an upper die, a lower die, a left partition plate, a right partition plate, a front partition plate, a rear partition plate, demolding screws, positioning screws, demolding holes, positioning holes, a rectangular sealing groove a, a glue outlet, a positioning threaded hole, a glue injection port, an O-shaped sealing ring a, a rectangular sealing groove b and an O-shaped sealing ring b;
The upper die is a rectangular flat plate with a boss, a rectangular sealing groove a is arranged at the position 10mm away from the outer edge of the boss, and the cross section of the upper die is rectangular and takes a rectangular shape; the sealing groove a is positioned on the butt joint surface contacted with the left baffle, the right baffle, the front baffle and the rear baffle; the four sides are provided with 12 positioning holes connected with the hole sites of the front partition plate, the rear partition plate, the left partition plate, the right partition plate and the lower die, the four corners are also provided with 4 demolding holes, and one end of the long side of the upper die is provided with 3 glue outlets;
The left baffle plate, the right baffle plate, the front baffle plate and the rear baffle plate are of cuboid structures with conical surfaces, wherein the contact surfaces of the left baffle plate, the front baffle plate and the rear baffle plate are respectively provided with 2 rectangular sealing grooves b for installing O-shaped sealing rings b, and the cross sections of the rectangular sealing grooves are rectangular and are in a straight line shape; the right baffle plate, the front baffle plate and the rear baffle plate are respectively provided with 2 rectangular sealing grooves b provided with O-shaped sealing rings b, and the cross section of each rectangular sealing groove is rectangular and is in a straight shape; the contact surface directions of the left baffle, the right baffle, the front baffle and the rear baffle and the upper die and the lower die are respectively provided with 3 hole site connecting positioning holes for corresponding to the upper die and the lower die; the left baffle plate is laterally provided with 2 positioning holes for connecting the front baffle plate and the rear baffle plate, the right baffle plate is laterally provided with 2 positioning holes for connecting the front baffle plate and the rear baffle plate, the front baffle plate is laterally provided with 2 positioning threaded holes, and the rear baffle plate is laterally provided with 2 positioning threaded holes;
The lower die is a rectangular flat plate with a boss, 12 positioning threaded holes are formed in four sides of the lower die, a rectangular sealing groove a is formed in the position, 10mm away from the outer edge of the boss, of the lower die, and the cross section of the lower die is rectangular and takes a rectangular shape; the sealing groove a is positioned on the butt joint surface contacted with the left baffle plate, the right baffle plate, the front baffle plate and the rear baffle plate, and one end of the long side of the lower die is provided with 1 glue injection port;
The 4 set screws pass through the locating holes of the left baffle plate and the right baffle plate respectively to be connected and fixed with the locating screw holes of the front baffle plate and the rear baffle plate to form a frame structure, the frame structure is sleeved on the lower die, the 12 set screws pass through the locating holes of the left baffle plate, the right baffle plate, the front baffle plate and the rear baffle plate to be connected and fixed with the locating screw holes of the lower die, the upper die is covered on the frame structure, and the left baffle plate, the right baffle plate, the front baffle plate, the rear baffle plate, the upper die convex surface and the lower die convex surface are combined into a die cavity.
2. The universal vacuum mold closing die for forming the prefabricated body reinforcing plates, as set forth in claim 1, wherein the lengths of the end faces of the rectangular sealing grooves b protruding out of the two ends of the sealing ring arranged on the partition plate are 0.1-0.3mm, the glue outlets are arranged on the upper die, the number of the glue injecting outlets is 3, the number of the glue injecting outlets is 1, the lower die is provided with glue flowing grooves, and the glue flowing grooves are arranged in the die cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810919687.7A CN108749033B (en) | 2018-08-14 | 2018-08-14 | General vacuum die-closing die for prefabricated reinforcing plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810919687.7A CN108749033B (en) | 2018-08-14 | 2018-08-14 | General vacuum die-closing die for prefabricated reinforcing plate |
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| CN108749033A CN108749033A (en) | 2018-11-06 |
| CN108749033B true CN108749033B (en) | 2024-05-07 |
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| CN110524756A (en) * | 2019-08-07 | 2019-12-03 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Treadmill test part molding die, treadmill test part production method and treadmill test part |
| CN112157929B (en) * | 2020-09-25 | 2022-07-08 | 湖南科嘉新材料有限公司 | Hot-press forming and demoulding method for short fiber reinforced carbon/resin composite material |
| CN115431445A (en) * | 2021-06-02 | 2022-12-06 | 惠阳航空螺旋桨有限责任公司 | Forming mold for composite material RTM (resin transfer molding) laminated plate and forming quality improvement method |
| CN114683589A (en) * | 2022-03-31 | 2022-07-01 | 中国航空制造技术研究院 | Composite material plate injection molding die tool and molding method thereof |
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