CN2691745Y

CN2691745Y - Sand mould centrifugal casting device

Info

Publication number: CN2691745Y
Application number: CN 200420038574
Authority: CN
Inventors: 王一诚; 李惠琪
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-02-17
Filing date: 2004-02-17
Publication date: 2005-04-13
Anticipated expiration: 2014-02-17

Abstract

Disclosed is a sand mould centrifugal casting device, which is fixed a metal shell on the rotating shaft of a centrifugal machine, and inside the metal shell is equipped a metal sheath which is sand mould and is detachable. A push rod is arranged inside the rotating shaft of the centrifugal machine; the metal sheath is provided an inner pushing disc and a back end cover on both ends of two semi-circle pile casings. After pouring, a cast is lifted out with the sand mould metal sheath by the push rod, and then another sand mould metal sheath is equipped inside the metal shell, so as to obtain continuous production.

Description

The sand mold centrifugal casting equipment

Technical field:

The utility model belongs to the device that metal casting is used.

Background technology:

Traditional sand mold centrifugal casting is suitable for overlapping the production of class foundry goods.It is to fix the core that can assemble decomposition in a tubular metal shell.Between metal shell and core, insert molding sand and make back taking-up core firm by ramming, the oven dry back is connected on the centrifuge rotating shaft with bolt by ring flange, under rotation status, pour into molten metal, watered and metal shell has been unloaded down from centrifuge after solidifying, claw foundry goods, make next sand mold again after the metal shell cooling.This production method and foundry goods of the every production of device need be rolled over and adorn metal shell one time, can not realize continuous production, folding dress has repeatedly not only increased labour intensity, reduced efficiency, also can destroy the spinning precision of centrifuge, cause foundry goods off-centre, wall thickness is irregular, also be prone to accident, so be sought after a kind of sand mold centrifugal casting equipment of special use.

Summary of the invention:

The application's purpose provides a kind of can production continuously, the sand mold centrifugal casting equipment that need not dismantle repeatedly.

Technical scheme is, on the centrifuge rotating shaft by ring flange fixing on the rotating metallic shell, at rotating shaft axle core one push rod is set, the Knockdown metal sheath of the prefabricated rotation sand mold of packing in rotational shell is fixed together with the locking taper pin.

For ease of the making of sand mold and the taking-up of foundry goods, protective metal shell is dismantled and assembled structure, comprises that interior push-plate, two semicircles have the casing and the rear end cap of some passages.The casing that the two halves circle of earlier prefabricated sand mold being packed into when producing foundry goods is formed, the interior push-plate of packing into successively in metal shell then, rotary-type casing and the rear end cap of band sand form sand mold protective metal shell integral body.

Start centrifuge and quantitatively pour into molten metal, eject with will the cast sand mold protective metal shell integral body of foundry goods of push rod after the initial set, transport the sand removal place to, carry out the production cycle of next foundry goods again.For ease of continuous production, prepare many cover protective metal shells and prefabricated a certain amount of rotation sand mold.

Good effect of the present utility model is:

1, the rotation sand mold is prefabricated outside metal shell, and cast back foundry goods ejects together with protective metal shell integral body with push rod, has avoided the metal shell repeated disassembled and assembled, can be fixed on the centrifuge always, reduces the dismounting operation, has improved production efficiency, has guaranteed the precision of centrifugation apparatus.

2, the rotation sand mold can shift to an earlier date prefabricated some standbyly, and protective metal shell is easy to assembly, realizes the production of Continuous Flow waterline, the production efficiency height.

3, owing to not influenced by the production of next foundry goods, thus after foundry goods is removed sheath the cool time in sand mold unrestricted, eliminated artificial fast cold sclerosis that causes and oxidative phenomena, the raising internal quality of casting.

Description of drawings:

Fig. 1 is the utility model master pseudosection.

Marginal data: 1-centrifuge principal axis; The 2-push rod; The 3-ring flange; The 4-metal shell; Push-plate in the 5-; The 6-steam vent; The 7-sand mold; 8-metal casing; The 9-foundry goods; The 10-outer end cap; 11-locks taper pin; The 12-protective cover.

The specific embodiment:

1 couple of the utility model embodiment structure and using method are described further in conjunction with the accompanying drawings.

1, metal shell 4 is installed on the centrifuge principal axis 1 by ring flange 3.

2, make prefabricated some waterglass sand molds 7 on the platform at sand mold, behind the dehydrating and curing, make its intensity＞2Mpa, the metal casing 8 of two semicircles put into prefabricated waterglass sand mold 7 by the water base fireproof coating of die cavity inwall brushing.

3, the interior push-plate 5 of filling fire resisting material is inserted in the locating hole at metal shells 4 rear portions, and then push the metal casing 8 that is placed with sand mold 7, sand mold 7 rear ends are inserted in the seam of interior push-plate 5, buckle the outer end cap 10 of filling fire resisting material, interior push-plate 5, metal casing 8, outer end cap 10 is formed the protective metal shell of sand mold 7, again four locking taper pins 11 are inserted in the locking hole of metal shell 4 from inside to outside, and touch with hand hammer, utilize the tapering of locking taper pin 11, extruding outer end cap 10 is locked at axial location in the metal shell 4 with the sand mold of band protective metal shell, place protective cover 12, fix pouring basin position (not drawing among the figure).

4, start centrifuge, moisture content unnecessary in the sand mold 7 is thrown away about 1 minute, carry out molten metal then and quantitatively pour into a mould; Casting complete and when being condensed to black dull centre, foundry goods two ends and being kermesinus; four locking taper pins 11 are laid down in shutdown; start ejecting mechanism; whole sand mold is formed (push-plate 5, metal casing 8, sand mold 7, foundry goods 9, outer end cap 10 in comprising) whole metal shell 4 of releasing by push rod 2, transported to the sand removal place.

5, cleaning metal shell 4 inwalls according to above-mentioned 3,4 steps, carry out the production of next foundry goods.

6, dismounting simultaneously transports the sand mold combination in sand removal place to, and the protective metal shell 8 of two semicircle shapes of at first dismantling, interior push-plate 5 and outer push-plate 10 make sand mold 7 together with foundry goods 9 air coolings, last sand removal.

For the ease of serialization production, interior push-plate 5, outer end cap 10 and the protective metal shell 8 that should prepare many covers specification of the same race recycle.

In order to prove effect of the present utility model, utilize the utility model to produce each two over thousands of of the cylinder jacket of marine diesel 170 and 190 two kind of model, the casting qualification rate that reaches is 90%, steady quality, cost obviously reduces.For example the cylinder jacket with 190 models is an example, with traditional die spinning method, the weight of every liner blank is 73 kilograms, utilize every weight of same model blank of method casting of the present utility model to have only 43 kilograms, and quality homogeneous qualification rate height, the resistance to corrosion seawater of liner backs and resistance to pitcorrosion improve more than 1 times in the installation launching-out operation, and comprehensive mechanical performance also is significantly improved.

Claims

1, a kind of sand mold centrifugal casting equipment: it comprises centrifuge and metal shell, it is characterized in that, metal shell is fixed on the centrifuge rotating shaft by flange, and it also is included in the Knockdown metal sheath of the prefabricated sand mold of packing in the metal shell in addition, is provided with push rod in the centrifuge rotating shaft.

2, device as claimed in claim 1 is characterized in that, protective metal shell is two semicircle metal casings, and front end has interior push-plate, and there is rear end cap the rear end.

3, device as claimed in claim 1 or 2 is characterized in that locking hole is arranged on the metal shell, by locking taper pin protective metal shell is locked in the metal shell.

4, device as claimed in claim 3 is characterized in that being mounted with protective cover in the metal shell rear end.