CN217964719U

CN217964719U - Split type die for casting high-pressure flange

Info

Publication number: CN217964719U
Application number: CN202222333326.9U
Authority: CN
Inventors: 尹志华
Original assignee: Anhui Zhida Electric Technology Co ltd
Current assignee: Anhui Zhida Electric Technology Co ltd
Priority date: 2022-09-02
Filing date: 2022-09-02
Publication date: 2022-12-06
Anticipated expiration: 2032-09-02

Abstract

The utility model discloses a split type mould for casting high-pressure flange, including bottom plate, split type left and right die cavity and iron core, demountable installation has bush and insulator on the bottom plate, the first clamp plate of liftable of top surface fixedly connected with of iron core, be equipped with the second clamp plate above it, the lower surface of second clamp plate is fixedly connected with a plurality of ejector pins and release link respectively, the lower extreme of a plurality of ejector pins runs through first clamp plate and iron core in proper order and is leveled with the roof of the shaping chamber of left and right die cavity, the lower extreme of a plurality of release links runs through first clamp plate and is inconsistent with the top surface of left and right die cavity; and a limiting column for limiting the ascending stroke of the second pressure plate is arranged above the second pressure plate. The utility model adopts the bushing and the porcelain bushing to replace the liquid inlet channel, which can not cause destructive influence on the bottom plate; and the ejector rod is matched with the limiting column and the split type cavity is adopted, so that the demolding is facilitated, the demolding can be realized without knocking the mold, the deformation and the damage of the cavity can not be caused, and the service life of the mold is ensured.

Description

Split type die for casting high-pressure flange

Technical Field

The utility model relates to a high-pressure flange casting technical field specifically is a split type mould for casting high-pressure flange.

Background

The transformer bushing is a main insulation device outside the transformer box, wherein the oiled paper condenser transformer bushing is mainly used in a power transformer as a high-voltage wire and a high voltage introduced into the transformer to insulate a transformer housing, and has the advantage of low cost compared with a dry-type transformer bushing.

The high-voltage insulating sleeve flange is a high-voltage flange for short, and is a transition or isolation device for installing a sleeve on a connecting device (flange) of a partition plate and insulating the upper part and the lower part (inside and outside) of an insulating sleeve. The use cases are such as: and partitions such as transformer outgoing lines, walls, GIS equipment incoming and outgoing lines and the like which are generally connected with the ground.

The high-pressure flange has the following main functions: (1) installing a fixed sleeve; (2) sealing with the connected high-voltage electrical appliance; (3) The outgoing line of the tap screen is used for grounding the sleeve or testing the performance of the sleeve; (4) installing a hanging ring for hoisting a product; (5) installing an oil taking device for detecting oil taking of the sleeve; (6) installing a product nameplate mark; (7) And the position for installing the current transformer is provided as required, so that the mechanical strength of the product is ensured, and the like.

At present, a high-pressure flange is formed by adopting a low-pressure casting mode, a mold of the high-pressure flange comprises a bottom plate fixed on a machine table of a low-pressure casting machine, a cavity capable of being driven by a lifting table of the low-pressure casting machine to lift is arranged on the bottom plate, and a liquid inlet channel communicated with the interior of the cavity is arranged on the bottom plate. When the device works, dry compressed air is introduced into a sealed crucible (or a sealed tank), molten metal liquid rises along a liquid lifting pipe under the action of gas pressure and enters a cavity through a liquid inlet channel, and the gas pressure on the liquid level in the crucible is maintained until a casting is completely solidified in the cavity; then, the gas pressure on the liquid surface is released, and the molten metal liquid which is not solidified in the riser tube is refluxed into the crucible. After the casting is completely solidified, the lifting table drives the cavity and the casting to rise, and then the casting is moved out of the cavity.

In the actual working process, when molten metal enters the cavity through the liquid inlet channel, the heat is often concentrated in the middle of the bottom plate, so that local heating is uneven, and the bottom plate is prone to cracking; in addition, in the process of removing the casting, the cavity needs to be knocked repeatedly and frequently, so that the cavity is easily deformed and even damaged. The occurrence of the above two problems can cause the service life of the mold to be greatly reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects and shortcomings of the prior art, and provides a split type die for casting a high-pressure flange, which can not cause cracking of a bottom plate due to local high temperature by adopting a bush and a porcelain bushing to replace the traditional liquid inlet channel; in addition, through adopting ejector pin and spacing post to cooperate and split type die cavity, the drawing of patterns of being convenient for, and need not to strike mould itself and can realize the drawing of patterns, can not cause the die cavity to warp, damage to guarantee the life of mould.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a split type mould for casting high pressure flange, is including the bottom plate that is fixed in on the board of low pressure casting machine, the iron core that is used for casting left side die cavity and the right die cavity of high pressure flange and is located the inside of left side die cavity and right die cavity, its characterized in that: the left cavity and the right cavity are matched and can move transversely along the upper surface of the bottom plate, a through hole is formed in the middle of the bottom plate, a bushing is detachably mounted in the through hole, and a porcelain bushing communicated with the forming cavities of the left cavity and the right cavity is fixedly sleeved in the bushing; a first lifting pressure plate is fixedly connected to the top surface of the iron core, the first pressure plate is pressed on the top surfaces of the left cavity and the right cavity, a second pressure plate is arranged above the first pressure plate, a plurality of ejector rods and a plurality of reset rods which are distributed circumferentially are fixedly connected to the lower surface of the second pressure plate respectively, the lower ends of the ejector rods sequentially penetrate through the first pressure plate and the iron core downwards and are flush with the top walls of the forming cavities of the left cavity and the right cavity, and the lower ends of the reset rods penetrate through the first pressure plate downwards and are abutted to the top surfaces of the left cavity and the right cavity; and a limiting column for limiting the ascending stroke of the second pressing plate is arranged above the second pressing plate.

Furthermore, the through hole is a stepped hole with a small upper part and a large lower part, and a plurality of threaded blind holes are respectively arranged on the stepped surface of the stepped hole along the circumferential direction; the periphery of the bottom end of the bushing is provided with an integrally connected annular mounting seat, the annular mounting seat is respectively provided with a plurality of threaded through holes in one-to-one correspondence with the threaded blind holes along the circumferential direction, a plurality of fastening bolts are respectively screwed into the corresponding threaded through holes and the corresponding threaded blind holes correspondingly, and the bushing is mounted in the through holes.

Further, the bushing is made of die steel.

Furthermore, the upper surface of the bottom plate is fixedly connected with a slide rail, and the left cavity and the right cavity can transversely slide along the slide rail.

Furthermore, a plurality of cross rods are fixedly connected to the outer side walls of the left cavity and the right cavity, and connecting seats are fixedly connected to the free ends of the cross rods.

Furthermore, a plurality of support rods are fixedly connected to two sides of the upper surface of the first pressing plate, mold feet are fixedly connected to the top ends of the support rods on the same side, the mold feet are fixedly connected to the lower surface of a lifting platform of the low-pressure casting machine, and the lifting platform is driven by a lifting oil cylinder to lift.

Furthermore, at least two limiting columns are fixed on the frame of the low-pressure casting machine.

Furthermore, the upper surface of the first pressing plate is fixedly connected with a plurality of guide rods respectively, and the upper ends of the guide rods penetrate through the second pressing plate upwards and extend out.

Furthermore, the extending end of each guide rod is fixedly connected with a limiting block.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a bush and insulator replace traditional inlet channel, because the bush adopts the mould steel to make, hardness is big, intensity is high, the high temperature resistant characteristic of cooperation insulator can not cause the bottom plate fracture because of local high temperature, even if take place to damage, because the bush is detachable, consequently be convenient for change bush and/or insulator, can not cause destructive influence to the bottom plate to the mould utility life-span has been guaranteed.

2. The ejector rod of the utility model is matched with the limiting column, and after the cavity and the casting rise to a certain height along with the pressing plate, the casting can be automatically separated from the iron core; in addition, adopt split type die cavity, adopt both to closing promptly, separable left die cavity and right die cavity again, on not influencing cast basis, the drawing of patterns of being convenient for, and need not to strike mould itself and can realize the drawing of patterns, avoided causing the die cavity to take place to warp, damage because of relapse, frequent strike the die cavity to the mould utility life has been guaranteed.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a structural sectional view of the present invention.

Fig. 3 is a schematic structural diagram of a middle casting (high-pressure flange) according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, a split type mold for casting a high-pressure flange comprises a bottom plate 1 fixed on a machine table (not shown in the figure) of a low-pressure casting machine, a left cavity 2 and a right cavity 3 for casting the high-pressure flange, and an iron core 4 positioned inside the left cavity 2 and the right cavity 3, wherein the left cavity 2 and the right cavity 3 are opposite to each other and can transversely move along the upper surface of the bottom plate 1, a through hole is formed in the middle of the bottom plate 1, a bushing 5 is detachably mounted in the through hole, and a porcelain bushing 6 communicated with a forming cavity of the left cavity 2 and the forming cavity of the right cavity 3 is fixedly sleeved in the bushing 5; a first lifting pressing plate 7 is fixedly connected to the top surface of the iron core 4, the first pressing plate 7 is pressed on the top surfaces of the left cavity 2 and the right cavity 3, a second pressing plate 8 is arranged above the first pressing plate 7, the lower surface of the second pressing plate 8 is respectively and fixedly connected with a plurality of ejector rods 9 and a plurality of reset rods 10 which are circumferentially distributed, the lower ends of the ejector rods 9 downwards sequentially penetrate through the first pressing plate 7 and the iron core and are flush with the top walls of the forming cavities of the left cavity 2 and the right cavity 3, and the lower ends of the reset rods 10 downwards penetrate through the first pressing plate 7 and are abutted against the top surfaces of the left cavity 2 and the right cavity 3; and a limiting column 11 for limiting the ascending stroke of the second pressing plate 8 is arranged above the second pressing plate.

It should be noted that the lower ends of the plurality of ejector rods 9 sequentially penetrate through the corresponding through holes on the first pressing plate 7 and the iron core 4 downwards to penetrate through the first pressing plate 7 and the iron core 4, and the plurality of ejector rods 9 and the hole walls of the corresponding through holes are in sliding fit; similarly, the lower ends of the plurality of reset rods 10 downwards penetrate through corresponding through holes in the first pressure plate 7 to penetrate through the first pressure plate 7, and the plurality of reset rods 10 are in sliding fit with the hole walls of the corresponding through holes.

In the utility model, the through hole is a step hole with a small upper part and a big lower part, and a plurality of thread blind holes are respectively arranged on the step surface of the step hole along the circumferential direction; have the annular mount pad of body coupling around the bottom of bush 5 all around, be equipped with the screw thread through-hole with a plurality of screw thread blind hole one-to-one on the annular mount pad along circumference respectively, have a plurality of fastening bolt 12 to correspond the screw thread through-hole and screw thread blind hole corresponding respectively in, install bush 5 in the through-hole. Hereby, a detachable mounting of the bushing 5 in the through hole is achieved.

The utility model discloses in, bush 5 adopts the mould steel to make, has characteristics such as hardness is big, intensity height, non-deformable under the high temperature condition.

The utility model discloses in, the last fixed surface of bottom plate 1 is connected with slide rail 13, and slide rail lateral sliding can be followed to left side die cavity 2 and right side die cavity 3.

The utility model discloses in, equal fixedly connected with a plurality of horizontal pole 14 on the lateral wall of left side die cavity 2 and right side die cavity 3, the free end fixedly connected with connecting seat 15 of a plurality of horizontal pole 14.

Therefore, the connecting seat 15 is connected with a piston rod of a transverse oil cylinder assembled on the low-pressure casting machine, and the left cavity 2 and the right cavity 3 are driven to move oppositely or move back to back along the slide rail 13 through the extension and contraction of the piston rod of the transverse oil cylinder, so that the die assembly and the die separation are realized.

The utility model discloses in, the equal fixedly connected with a plurality of bracing piece 16 in both sides of the upper surface of first clamp plate 7, the top fixedly connected with mould foot 17 that is located a plurality of bracing piece 16 of homonymy, mould foot 17 fixed connection is in the lower surface of the elevating platform (not shown in the figure, lower with) of low pressure casting machine, and the elevating platform is driven it by lift cylinder (not shown in the figure, lower with) and goes up and down.

The utility model discloses in, spacing post 11 has two at least, is fixed in the frame (not shown in the figure, lower with) of low pressure casting machine on, when colliding with the second clamp plate 4 that rises, can even atress.

It should be noted that, in general, the upper end of the limiting column 11 is fixedly connected to the top beam of the frame, and the lower end of the limiting column 11 penetrates through the lifting table, so that the installation of the limiting column 11 is facilitated, the normal lifting of the lifting table is not affected, and the relative independence of the limiting column 11 and the lifting table is ensured.

The utility model discloses in, the upper surface of first clamp plate 7 is a plurality of guide arm 18 of fixedly connected with respectively, and the upper end of a plurality of guide arm 18 upwards runs through second clamp plate 8 and extends. Therefore, the guide can be provided for the lifting of the second pressing plate 8, and the plurality of ejector rods 9 and the plurality of reset rods 10 can be reset conveniently.

The utility model discloses in, the equal fixedly connected with stopper 19 of the extension end of every guide arm can avoid a plurality of guide arm 18 and second clamp plate 8 to break away from mutually.

The invention is further described below with reference to the accompanying drawings:

when the die assembling device works, a piston rod of the transverse moving oil cylinder extends out to drive the left cavity 2 and the right cavity 3 to move oppositely along the slide rail 13, so that the left cavity 2 and the right cavity 3 are oppositely matched to realize die assembling.

Adopting a low-pressure casting process, introducing dry compressed air into a sealed crucible (or a sealed tank), rising molten metal along a liquid lifting pipe under the action of gas pressure, entering forming cavities of a left cavity 2 and a right cavity 3 through a porcelain bushing 6, and keeping the gas pressure on the liquid level in the crucible until a casting 20 is completely solidified in the forming cavities of the left cavity 2 and the right cavity 3; then, the gas pressure on the liquid surface is released, and the molten metal liquid which is not solidified in the riser tube is refluxed into the crucible.

After the set pressure maintaining and heat preserving time is reached, the casting 20 is completely solidified, the piston rod of the transverse oil cylinder retracts, the left cavity 2 and the right cavity 3 are driven to move back along the sliding rail 13, the left cavity 2 and the right cavity 3 are separated, and mold splitting is realized.

Then, the piston rod of the lifting cylinder retracts to drive the lifting platform to ascend, so as to drive the mold foot 17 to ascend, thereby driving the first pressing plate 7 to ascend through the plurality of supporting rods 16, and driving the iron core 4 and the casting 20 to ascend integrally. At this time, under the action of the casting 20 pressing the ejector rods, the plurality of ejector rods 9, the plurality of reset rods 10 and the second pressure plate 8 integrally ascend.

In the process, a receiving plate (not shown, the same applies hereinafter) mounted on the low-pressure casting machine and rotating is moved above the base plate 2.

After the first pressing plate 7 ascends to a certain height, the second pressing plate 8 collides with the limiting column 11, and under the limiting action of the limiting column 11, the second pressing plate 8 does not ascend any more, and the iron core 4 and the casting 20 continue to ascend integrally with the first pressing plate 7.

At this time, the ejector rods 9 extend out relative to the iron core 4 to eject the casting 20, that is, the casting 20 is separated from the iron core 4 and then falls onto the receiving tray, and the receiving tray moves the casting 20 out through rotary motion.

And then, the piston rod of the transverse oil cylinder stretches out again to drive the left cavity 2 and the right cavity 3 to move oppositely along the slide rail 13, so that the left cavity 2 and the right cavity 3 are matched to realize the re-mold closing.

Then, under the action of the reverse acting force applied to the collision positioning column 11 and the gravity of the collision positioning column, the plurality of ejector rods 9, the plurality of reset rods 10 and the second pressing plate 8 integrally descend until the lower ends of the plurality of reset rods 10 are abutted to the top surfaces of the left cavity 2 and the right cavity 3 again.

Then, the piston rod of the lift cylinder extends out to drive the lift platform to descend, and then drives the mold foot 17 to descend, thereby driving the first pressing plate 7 to descend through a plurality of supporting rods 16, driving the iron core 4 to descend and fall into the insides of the left cavity 2 and the right cavity 3, and at the moment, the lower ends of a plurality of ejector rods 9 are level with the top walls of the forming cavities of the left cavity 2 and the right cavity 3 again.

And then, repeating the process, continuously matching with a low-pressure casting machine and adopting a low-pressure casting process to process a new casting so as to realize continuous production.

Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.

Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all the equivalent changes made within the scope of the claims of the present application are the protection scope of the claims of the present application.

Claims

1. The utility model provides a split type mould for casting high-pressure flange, is including the bottom plate that is fixed in on the board of low pressure casting machine, the iron core that is used for casting high-pressure flange's left side die cavity and right die cavity and is located the inside of left side die cavity and right die cavity, its characterized in that: the left cavity and the right cavity are matched and can move transversely along the upper surface of the bottom plate, a through hole is formed in the middle of the bottom plate, a bushing is detachably mounted in the through hole, and a porcelain sleeve communicated with the forming cavities of the left cavity and the right cavity is fixedly sleeved in the bushing; a first lifting pressing plate is fixedly connected to the top surface of the iron core, the first pressing plate is pressed on the top surfaces of the left cavity and the right cavity, a second pressing plate is arranged above the first pressing plate, the lower surface of the second pressing plate is respectively and fixedly connected with a plurality of ejector rods and a plurality of reset rods which are circumferentially distributed, the lower ends of the ejector rods downwards sequentially penetrate through the first pressing plate and the iron core and are flush with the top walls of the forming cavities of the left cavity and the right cavity, and the lower ends of the reset rods downwards penetrate through the first pressing plate and are abutted to the top surfaces of the left cavity and the right cavity; and a limiting column for limiting the ascending stroke of the second pressing plate is arranged above the second pressing plate.

2. The split mold for casting a high-pressure flange according to claim 1, wherein: the through hole is a stepped hole with a small upper part and a large lower part, and a plurality of threaded blind holes are respectively arranged on the stepped surface of the stepped hole along the circumferential direction; the periphery of the bottom end of the bushing is provided with an integrally connected annular mounting seat, threaded through holes in one-to-one correspondence with the threaded blind holes are formed in the annular mounting seat along the circumferential direction, a plurality of fastening bolts are screwed into the corresponding threaded through holes and the corresponding threaded blind holes correspondingly, and the bushing is mounted in the through holes.

3. The split mold for casting a high-pressure flange according to claim 2, wherein: the bushing is made of die steel.

4. The split mold for casting a high-pressure flange according to claim 1, wherein: the upper surface of the bottom plate is fixedly connected with a slide rail, and the left cavity and the right cavity can transversely slide along the slide rail.

5. The split mold for casting a high-pressure flange according to claim 1, wherein: the outer side walls of the left cavity and the right cavity are fixedly connected with a plurality of cross rods, and free ends of the cross rods are fixedly connected with connecting seats.

6. The split mold for casting a high-pressure flange according to claim 1, wherein: the two sides of the upper surface of the first pressing plate are fixedly connected with a plurality of supporting rods, the top ends of the supporting rods positioned on the same side are fixedly connected with mold feet, the mold feet are fixedly connected to the lower surface of a lifting platform of the low-pressure casting machine, and the lifting platform is driven by a lifting oil cylinder to lift.

7. The split mold for casting a high-pressure flange according to claim 1, wherein: at least two limiting columns are fixed on a rack of the low-pressure casting machine.

8. The split mold for casting a high-pressure flange according to claim 1, wherein: the upper surface of the first pressing plate is fixedly connected with a plurality of guide rods respectively, and the upper ends of the guide rods penetrate through the second pressing plate upwards and extend out.

9. The split mold for casting a high pressure flange according to claim 8, wherein: the extending end of each guide rod is fixedly connected with a limiting block.