CN220871569U - Easily-broken cover and die - Google Patents
Easily-broken cover and die Download PDFInfo
- Publication number
- CN220871569U CN220871569U CN202322543139.8U CN202322543139U CN220871569U CN 220871569 U CN220871569 U CN 220871569U CN 202322543139 U CN202322543139 U CN 202322543139U CN 220871569 U CN220871569 U CN 220871569U
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- cover
- groove
- cover body
- ring groove
- central
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- 238000000465 moulding Methods 0.000 claims abstract description 18
- 239000000835 fiber Substances 0.000 claims abstract description 10
- 238000000748 compression moulding Methods 0.000 claims abstract description 3
- 239000002131 composite material Substances 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 abstract description 10
- 238000012545 processing Methods 0.000 abstract description 6
- 238000003825 pressing Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 6
- 238000010304 firing Methods 0.000 description 5
- 239000012634 fragment Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000001721 transfer moulding Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model relates to the field of end covers for transmitting boxes, in particular to an easy-to-crack cover and a mold, wherein the easy-to-crack cover comprises a cover body, the cover body is a discontinuous fiber molding compound cover, a central diverging groove radiating outwards from the center and a ring groove with the same geometric shape as the cover body are arranged on the cover body, and the central diverging groove is connected with the ring groove to form a weak area; the ring groove is provided with a connecting structure connected with the transmitting device. The utility model changes the existing easy-to-crack cover into a discontinuous fiber molding cover. The weak area is constructed at one time by a mould pressing method, so that the need of secondary processing is avoided, and time and labor are wasted. The utility model also provides a novel easy-to-crack cover die, which comprises a female die and a male die, wherein a connecting structure is arranged between the female die and the male die, and a forming cavity for forming the easy-to-crack cover by compression molding is formed after the female die and the male die are closed.
Description
Technical Field
The utility model relates to the field of end covers for transmitting boxes, in particular to an easy-to-crack cover and a mold.
Background
The end cap of the launch box is an important component in the launch device. At present, the transmitting box cover mainly comprises a mechanical cover, a blasting cover and a composite material frangible cover: the mechanical cover typically requires a dedicated power system and servo system, increasing the overall firing system load and thus the time to complete the opening is long. The explosion cover is opened without servo control, so that the reaction is quicker, but the disposable cost is higher, and the maintenance is complex. Electronic components inside the firing box are easily damaged during blasting. The composite material frangible cover is a box cover which is most applied and used at present, has the characteristics of light weight and quick response, and is ejected by utilizing a projectile body or opened by emitting airflow and shock wave action, so that the process of electronic box opening is omitted, the emission efficiency is greatly improved, and the requirement on quick emission is met.
The composite frangible cover is typically comprised of a composite body, a weakened area structure, a rim flange, and the like. In the prior art, the easy-to-crack cover is formed by paving continuous fibers (fabrics) in a mould through a manual layer and further curing by adopting a Resin Transfer Molding (RTM) or autoclave process. However, the strength of the molded cover is too high and the failure mode is difficult to control. In the prior art, in order to control the breaking state of the breaking piece after the easy-breaking cover fails, the breaking piece cannot be too large or too small; and all of the fragments are broken, and the situation that after one part of the fragments are broken, the other part of the fragments still remain on the transmitting box (barrel) cannot occur; a frangible cover is typically provided with a frangible zone structure. The current weak area structural design mainly comprises the following three modes: 1. and (3) after the integral forming and cutting, bonding, wherein the bonding part becomes a weak area. The integral molding and cutting and then gluing process is relatively complex, secondary molding is often needed, the gluing strength is low, reinforcement is needed, the process efficiency is low, and the process cost is high. 2. The easy-to-crack cover adds stress groove: after the cover body is molded, the stress groove is machined by manually designing the position of the stress groove. Because the frangible cover body is formed of continuous fibers, even if the stress grooves are formed by machining, there are still conditions of failure from the predetermined weakened areas. 3. Presetting defects on a fabric; the fabric layers are then bonded together by dipping in resin to form a frangible cover. However, the arrangement of the defect layer will further increase the difficulty of the process.
In the prior art, the prior art scheme requires extremely high labor cost for cutting and gluing after molding, adding stress grooves by mechanical processing and presetting defects on fabrics, and meanwhile, uncontrollable factors of product quality are increased by manual operation.
Disclosure of utility model
The utility model aims to provide an easy-to-crack cover, which is used for solving the problems that the existing easy-to-crack cover needs manual processing, and has complex working procedures and low production efficiency. The utility model also aims to provide a processing mould for the easy-to-crack cover, which is used for forming the easy-to-crack cover body at one time.
In order to solve the problems, the technical scheme in the utility model is as follows:
The cover body is a discontinuous fiber molding composite cover, a central divergence groove radiating outwards from the center and an annular groove matched with the geometric shape of the cover body are arranged on the cover body, the central divergence groove is connected with the annular groove, and the central divergence groove and the annular groove jointly form a weak area; the ring groove is provided with a connecting structure for connecting with the transmitting device.
The advantages are that: the utility model improves the existing easy-to-crack cover, and specifically: the frangible cover is changed to a discontinuous fiber molded cover. Compared with the existing easy-to-crack cover, the strength of the body material is lower, and the failure pressure of the easy-to-crack cover can be effectively regulated and controlled by regulating and controlling the thickness of the weak area, so that the application range of the discontinuous fiber molded cover is wider than that of the continuous fiber layering easy-to-crack cover disclosed by the prior art. And the weak area can be built at one time by a mould pressing method, so that the problem that secondary processing is required and time and labor are wasted is avoided.
Further, the central diverging grooves are evenly distributed in the circumferential direction.
The advantages are that: the grooves are uniformly distributed, so that the grooves are more uniform when stressed and fragments are more uniform when broken.
Further, the central diverging groove depth is greater than the groove depth.
The advantages are that: during the transmission, the annular is close to the connection structure, so that the stress concentration phenomenon is easier to occur, if the depth of the annular is the same as that of the central divergence groove or is larger than that of the central divergence groove, the annular is broken firstly, the central divergence groove is broken less quickly, and the large cover body is emitted by high-pressure gas. Because the emitted cover body is large in size and high in speed, accidents are easily caused. To avoid this, the central diverging groove breaks before the ring groove, so the depth of the central diverging groove is greater than the depth of the ring groove. The failure pressure of the easy-to-crack cover can be effectively regulated and controlled by regulating and controlling the depth of the annular and central divergence grooves.
Further, the cover body is a regular polygon cover body, the ring groove is a regular polygon ring groove matched with the cover body, and the central divergent groove is connected with the ring groove at the vertex of the regular polygon.
The advantages are that: the regular polygon cover body is convenient to manufacture, and the groove is arranged along the diagonal line with small difficulty, so that the regular polygon cover body is convenient to manufacture.
Further, the cover is a regular quadrilateral cover.
The advantages are that: the regular quadrilateral cover body is convenient to manufacture, and the groove is arranged along the diagonal line, so that the difficulty is small, and the manufacture is convenient.
Further, the cover body is a flat cover.
The advantages are that: saves space, is convenient for manufacturing, and has better concealment after installation.
Further, the connecting portion is a bolt through hole.
The advantages are that: the bolt connection is adopted, so that the installation is convenient, and the detachable structure is detachable.
A mould comprises a female mould and a male mould, wherein a connecting structure is arranged between the female mould and the male mould, and a forming cavity for compression moulding of an easy-to-crack cover is formed after the female mould and the male mould are closed. The easy-to-crack cover comprises a cover body, wherein the cover body is a discontinuous fiber molding composite cover, a central divergent groove radiating outwards from the center and an annular groove matched with the geometric shape of the cover body are arranged on the cover body, the central divergent groove is connected with the annular groove, and the central divergent groove and the annular groove jointly form a weak area; the ring groove is provided with a connecting structure for connecting with the transmitting device.
The advantages are that: the utility model provides a novel easy-to-crack cover die which is used for forming the discontinuous limiting molding compound cover, and the weak area of the easy-to-crack cover is constructed at one time by a die pressing method, so that the problems of secondary processing and time and labor waste are avoided.
Further, the central diverging grooves are evenly distributed in the circumferential direction.
The advantages are that: the grooves are uniformly distributed, so that the grooves are more uniform when stressed and fragments are more uniform when broken.
Further, the central diverging groove depth is greater than the groove depth.
The advantages are that: during the transmission, the annular is close to the connection structure, so that the stress concentration phenomenon is easier to occur, if the depth of the annular is the same as that of the central divergence groove or is larger than that of the central divergence groove, the annular is broken firstly, the central divergence groove is broken less quickly, and the large cover body is emitted by high-pressure gas. Because the emitted cover body is large in size and high in speed, accidents are easily caused. To avoid this, the central diverging groove breaks before the ring groove, so the depth of the central diverging groove is greater than the depth of the ring groove. The failure pressure of the easy-to-crack cover can be effectively regulated and controlled by regulating and controlling the depth of the annular and central divergence grooves.
Further, the cover body is a regular polygon cover body, the ring groove is a regular polygon ring groove matched with the cover body, and the central divergent groove is connected with the ring groove at the vertex of the regular polygon.
The advantages are that: the regular polygon cover body is convenient to manufacture, and the groove is arranged along the diagonal line with small difficulty, so that the regular polygon cover body is convenient to manufacture.
Further, the cover is a regular quadrilateral cover.
The advantages are that: the square cover body is convenient to manufacture, and the groove is arranged along the diagonal line, so that the difficulty is small, and the manufacturing is convenient.
Further, the cover body is a flat cover.
The advantages are that: saves space, is convenient for manufacturing, and has better concealment after installation.
Further, the connecting portion is a bolt through hole.
The advantages are that: the bolt connection is adopted, so that the installation is convenient, and the detachable structure is detachable.
Drawings
Fig. 1 is: the mould (male mould) structure schematic diagram of the easy-to-crack cover is provided;
Fig. 2 is: the mould (female mould) structure schematic diagram of the easy-to-crack cover is provided;
fig. 3 is: the blank structure schematic diagram of the easy-to-crack cover is provided;
Fig. 4 is: the structure of the easy-to-crack cover is schematically shown.
In the figure: 1. a male die limiting block; 2. the center of the male die diverges the convex strips; 3. a male die annular convex strip; 4. a female die limit groove; 5. a central diverging recess; 6. a ring groove; 7. a flange interface region; 8. perforating a bolt; 9. a male mold cover; 10. the bottom surface of the female die; 11. and a female die frame.
Detailed Description
The features and capabilities of the present utility model are described in further detail below in connection with the examples.
Embodiment one of the mold of the present utility model:
As shown in fig. 1-2, the mold of the present utility model comprises a female mold and a male mold. The female die comprises a female die base 10, the base is a regular quadrangle, a female die frame 11 is connected to the female die base 10, a female die limit groove 4 is formed in the female die frame 11, the male die comprises a male die cover 9, the male die cover 9 is a regular quadrangle die cover, a male die limit block 1 is arranged on the periphery of the male die cover 9, and the female die limit groove 4 is matched with the male die limit block 1 to connect the female die limit groove and the male die limit block 1 in a positioning manner.
The male die cover 9 is internally provided with a male die center divergence convex strip 2, and the male die center divergence convex strip 2 diverges outwards. The male die cover 9 is also internally provided with a positive quadrilateral male die annular convex strip 3. The central divergent convex strip 2 of the male die intersects with the annular convex strip 3 of the male die at the vertex of the annular convex strip 3 of the male die and coincides with the diagonal line of the annular convex strip 3 of the male die. The height of the central divergence convex strip 2 of the male die is larger than that of the annular convex strip 3 of the male die.
When in use, the pasty molding compound with the length of not more than 6mm is mixed with the epoxy resin, and is injected into the female mold, then a proper male mold is selected, the male mold is covered on the female mold, and the female mold limiting groove 4 and the male mold limiting block 3 are mutually fixed. The central diverging convex strips 2 of the male mould are directly contacted with the molding compound to form central diverging grooves 5; the male mold circumferential ribs 3 directly contact the molding compound to form the annular grooves 6. The cover of the male mold, which is located outside the circumferential bead 3, contacts the molding compound and presses against it to form the flange interface area 7. After solidification, the mold is released to obtain a blank of the frangible cover shown in FIG. 3. The blank is polished and the flange joint area 7 is drilled to obtain the frangible cover as shown in figure 4.
Embodiment two of the mold of the present utility model: the difference between this embodiment and the first embodiment is that: the female die base is regular octagon, the female die frame is regular octagon in adaptation with the base, the male die cover is regular octagon, the male die annular raised line is regular octagon in adaptation with the male die cover, the male die center divergent raised line is arranged along the male die annular raised line diagonal, and intersects with the male die annular raised line at the top.
Embodiment III of the mold of the utility model: the difference between this embodiment and the first embodiment is that: the female die base is circular, the female die frame is also circular in adaptation with the base, the male die cover is circular, the male die annular convex strip is circular in adaptation with the male die cover, eight diverging convex strips in the center of the male die are distributed along the diameter of the male die annular convex strip and are intersected with the male die annular convex strip.
However, in other embodiments, three, six or more may be used, but not less than three may affect the crushing effect, but too much may cause excessive debris to fall into the firing chamber.
Embodiment IV of the mold of the utility model: the difference between this embodiment and the first embodiment is that: the central divergent convex strip of the male die is the same as the annular convex strip of the male die in height.
Fifth embodiment of the mold of the present utility model: the difference between this embodiment and the first embodiment is that: the cover body of the male die cover body is integrally and outwards protruded at the inner part of the male die annular convex strip, the base of the female die base corresponding to the inner cover body of the male die annular convex strip is inwards sunken, and the protrusions on the male die are matched with the depressions on the female die.
Embodiment one of the frangible cover of the present utility model:
The frangible cover in this embodiment is compression molded by the above mold.
As shown in fig. 4: the easy-to-crack cover is a regular quadrilateral cover, a ring groove 6 is arranged on the easy-to-crack cover, the ring groove 6 is a regular quadrilateral, the ring groove 6 is connected with the central diverging groove 5 at the vertex of the ring groove 6, and the central diverging groove 5 is arranged along a diagonal line. The upper surface of the frangible cover is formed by contact and extrusion of the male die 9 with the molding compound; the central diverging convex strips 2 of the male mould are directly contacted with the molding compound and extruded to form central diverging grooves 5; the male mold circumferential rib 3 directly contacts and presses the molding compound to form the ring groove 6. The lower surface of the frangible cover is formed by the extrusion of the molding compound by the male mold 9 and the support of the bottom surface of the female mold 10. The regular quadrilateral cover body is convenient to manufacture, the difficulty of forming grooves along diagonal lines is small, and the grooves are easy to form. The depth of the central diverging recess 5 is greater than the depth of the annular groove 6. When the emitter emits, a large amount of high-temperature and high-pressure gas is released, so that the pressure in the emitting cavity is greatly increased. The ring groove 6 is close to the connecting structure, so that stress concentration phenomenon is easier to occur, if the depth of the ring groove 6 is the same as that of the central divergence groove 5 or larger than that of the central divergence groove 5, the ring groove 6 is broken firstly, the central divergence groove 5 is broken less quickly, and the large cover body is emitted by high-pressure gas. Because the emitted cover body is large in size and high in speed, accidents are easily caused. In order to avoid this, the central diverging recess 5 breaks before the ring groove 6, so the depth of the central diverging recess 5 is greater than the depth of the ring groove 6. The easy-to-crack cover is a flat cover, which can save space, is convenient to manufacture and has better concealment after installation.
The outside of the ring groove 6 is provided with a connecting structure, the connecting structure comprises a flange interface area 7, and the flange interface area 7 is provided with a bolt perforation 8. The frangible cover connection is secured to the firing mechanism by the cooperation of the bolt perforations 8 and the bolts. Through the cooperation of bolt hole and bolt, realize easy crack lid and emission mechanism's quick connect to realized with emission mechanism between detachable the connection.
Embodiment two of the frangible cover of the present utility model: the difference between this embodiment and the first embodiment is that: the cover body is regular octagon, the ring groove is regular octagon, the central divergent groove is arranged along the diagonal line of regular octagon, and the central divergent groove is intersected with the ring groove at the top point of the ring groove.
Embodiment III of the frangible cover of the present utility model: the difference between this embodiment and the first embodiment is that: the cover body is circular, the annular groove is circular matched with the cover body, eight central divergent grooves are arranged along the diameter of the annular groove and are intersected with the annular groove.
However, in other embodiments, three, six or more may be used, but not less than three may affect the crushing effect, but too much may cause excessive debris to fall into the firing chamber.
Embodiment IV of the frangible cover of the present utility model: the difference between this embodiment and the first embodiment is that: the groove depth is the same as the central diverging groove depth.
Fifth embodiment of the frangible cover of the present utility model: the difference between this embodiment and the first embodiment is that: the cover body is arc-shaped at the part of the cover body inside the flange connection area.
The above description is only a preferred embodiment of the present utility model, and the patent protection scope of the present utility model is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present utility model should be included in the protection scope of the present utility model.
Claims (8)
1. The utility model provides an easy crack lid, includes the lid, its characterized in that: the cover body is a discontinuous fiber molding composite cover, a central divergence groove (5) radiating outwards from the center and a ring groove (6) matched with the geometric shape of the cover body are arranged on the cover body, the central divergence groove (5) is connected with the ring groove (6), and the central divergence groove (5) and the ring groove (6) form a weak area together; the ring groove (6) is provided with a connecting structure for connecting with the launching device.
2. The frangible cover of claim 1, wherein: the central diverging grooves (5) are uniformly distributed in the circumferential direction.
3. The frangible cover of claim 2, wherein: the depth of the central divergent groove (5) is larger than that of the annular groove (6).
4. A frangible cover according to any one of claims 1 to 3, wherein: the cover body is a regular polygon cover body, the ring groove (6) is a regular polygon ring groove matched with the shape of the cover body, and the central divergent groove (5) is connected with the ring groove (6) at the vertex of the regular polygon.
5. The frangible cover of claim 4, wherein: the cover body is a regular quadrilateral cover body.
6. The frangible cover of claim 1, wherein: the cover body is a flat cover.
7. The frangible cover of claim 1, wherein: the connecting structure is a bolt through hole (8).
8. The utility model provides a mould, includes female die and positive mould, is provided with connection structure between female die and the positive mould, its characterized in that: after the female and male molds are closed, a molding cavity for compression molding the frangible cover according to any one of claims 1 to 7 is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322543139.8U CN220871569U (en) | 2023-09-19 | 2023-09-19 | Easily-broken cover and die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322543139.8U CN220871569U (en) | 2023-09-19 | 2023-09-19 | Easily-broken cover and die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220871569U true CN220871569U (en) | 2024-04-30 |
Family
ID=90814196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322543139.8U Active CN220871569U (en) | 2023-09-19 | 2023-09-19 | Easily-broken cover and die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220871569U (en) |
-
2023
- 2023-09-19 CN CN202322543139.8U patent/CN220871569U/en active Active
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