CN202343868U

CN202343868U - Pouring gate structure for gravity casting of flexural zinc alloy casting

Info

Publication number: CN202343868U
Application number: CN2011204696254U
Authority: CN
Inventors: 不公告发明人
Original assignee: Bath Articles Co Ltd Of South Larus Ridibundus Of Guangzhou
Current assignee: Bath Articles Co Ltd Of South Larus Ridibundus Of Guangzhou
Priority date: 2011-11-23
Filing date: 2011-11-23
Publication date: 2012-07-25
Anticipated expiration: 2021-11-23

Abstract

The utility model discloses a pouring gate structure for the gravity casting of a flexural zinc alloy casting. The pouring gate structure comprises a die body in which a cavity which is bent to form an arc shape is dug, wherein a string formed by connecting two ends of the arc shape is upward, and an arc is downward; a suspended sand core of which the shape is matched with that of the cavity is formed in the cavity; a forming wall cavity is formed by space between the sand core and a cavity wall; the die body comprises an inlet pouring gate and an outlet pouring gate; and the inlet pouring gate and the outlet pouring gate are communicated with the two ends of the forming wall cavity respectively. According to the pouring gate structure, the inlet pouring gate and the outlet pouring gate are communicated with the two ends of the forming wall cavity respectively, so that the impact force of injected zinc alloy liquid on the sand core is reduced, and the inconformity of wall thickness of the casting and bubbling and slag inclusion of the casting due to the displacement of the sand core caused by oversized impact are avoided; and the zinc alloy liquid poured from the inlet pouring gate can be filled from one end to the other end quickly, and flow out of the outlet pouring gate, and the pouring gate structure is high in liquid filling speed and does not have dead angles and turbulent flow. The pouring gate structure can be widely applied to the zinc alloy casting bent by the gravity casting.

Description

A kind of crooked Zinc alloy casting gravitational casting pouring gate structure

Technical field

The utility model relates to a kind of pouring gate structure of casting mould, particularly the pouring gate structure of the casting mould of kirsite gravitational casting.

Background technology

So-called gravitational casting is meant that molten metal injects the technology of casting mold under the terrestrial gravitation effect, also claims casting, and this metal casting technique is widely used in the zinc alloy casting field with its advantage simple in structure, with low cost.Even some zinc alloy pieces crooked, that have inner chamber, its rough casting also is to adopt gravitational casting.With reference to Fig. 1, the Zinc alloy casting gravitational casting pouring gate structure of conventional bending comprises die ontology; Dig a die cavity that bends to arc in the die ontology, the string that this arc two ends line constitutes up, arc is down; Be equipped with the core 2 of unsettled, shape and die cavity coupling in the die cavity; Space between core 2 and die cavity wall constitutes forming wall chamber 1, also processes downward main running channel 7 in the die ontology, and main running channel 7 stretches downwards and is branched off into some roads and divides running channel 8; Divide running channel 8 also to be positioned at the crooked camber line envelope in forming wall chamber 1, finally be communicated with forming wall chamber 1.Such pouring gate structure design; Be the zinc alloy metal liquid that pours into fusion for ease from vertical direction downwards from main running channel 7, molten metal reduces impact stress through undue running channel 8 bifurcateds; When they after minute running channel 8 enters into forming wall chamber 1; Be filled to whole forming wall chamber 1 rapidly, cooling then, final shape moulding according to forming wall chamber 1.Yet, are the sides that are communicated to forming wall chamber 1 owing to divide running channel 8, the impulsive force that molten metal injects is still bigger, core 2 is impacted become flexible easily, produces dislocation, and the wall unevenness of the crooked foundry goods of producing like this is even; Thisly in addition be easy to generate turbulent flow, be prone to wrap up in gas and be mingled with, material slag difficult treatment from the pouring type of side in the middle of being flushed to.

The utility model content

The purpose of the utility model, when being to provide a kind of cast zinc liquid, core is difficult for the crooked Zinc alloy casting gravitational casting pouring gate structure of displacement.

The solution that the utility model solves its technical problem is:

Crooked Zinc alloy casting gravitational casting pouring gate structure; Comprise and dig a die ontology that bends to the die cavity of arc, the string that said arc two ends line constitutes up, arc is down; Be equipped with the core of unsettled, shape and die cavity coupling in the die cavity; Space between core and die cavity wall constitutes the forming wall chamber, and said die ontology also includes running channel and goes out running channel, and the two is communicated with the two ends in forming wall chamber respectively.

As the further improvement of technique scheme, saidly go into running channel, go out the position that running channel is communicated with the two ends in forming wall chamber respectively, be provided with surge chamber.

The beneficial effect of the utility model is: the utility model has changed the link position in running channel and forming wall chamber, let into running channel with go out running channel and be communicated with the two ends in forming wall chamber respectively, just can directly not impact the core side the die cavity from going into the zinc liquid that running channel pours into so; Cause displacement, only can impact the end face of core, shock surface is little; Significantly reduced impulsive force; Avoided excessive impact to make core displacement make that casting section thickness is inconsistent, foundry goods bubbles, slag inclusion, can be filled to the other end rapidly from one, flow to out running channel at last from going into zinc liquid that running channel pours into; Fluid injection speed is fast, no dead angle, turbulent flow.The utility model simple and ingenious structure can be widely used in the crooked zinc alloy piece of gravitational casting.

Description of drawings

Below in conjunction with accompanying drawing and instance the utility model is further described.

Fig. 1 is traditional crooked Zinc alloy casting gravitational casting pouring gate structure;

Fig. 2 is the structure principle chart of the utility model.

The specific embodiment

With reference to Fig. 2, crooked Zinc alloy casting gravitational casting pouring gate structure comprises and digs a die ontology that bends to the die cavity of arc; The string that said arc two ends line constitutes up; Arc is equipped with the core 2 of unsettled, shape and die cavity coupling, the formation forming wall chamber, space 1 between core 2 and die cavity wall down in the die cavity; Said die ontology also includes running channel 4 and goes out running channel 5, and the two is communicated with the two ends in forming wall chamber 1 respectively.

Further as preferred embodiment, saidly go into running channel 4, go out the position that running channel 5 is communicated with the two ends in forming wall chamber 1 respectively, be provided with surge chamber 6.Surge chamber 6 can be avoided direct impact effectively, further reduces impulsive force.

In addition, this laminar flow fluid injection mode from the end face fluid injection has been avoided the turbulent phenomenon of side fluid injection, and air is to drain to the other end from an end, and exhaust is smooth and easy complete, and bubbling in no dead angle, can effectively solve to impact core 2, wraps up in problems such as gas.Through experiment, the yields of producing before improving is 50%, and the utility model yields after the improvement is 85%.

In addition, the utility model can also carry out following preferred implementation:

Further as preferred embodiment, said die ontology is a steel alloy, and the running channel position is edge copper, and such material structure distributes, and helps and the poor thermal conduction alienation, is beneficial to integral heat insulation and local heat radiation.

Further as preferred embodiment, said die cavity inwall is close to and is had one deck complex layer coating layer.Through changing the composition of complex layer coating in the complex layer coating layer, let it have heat conduction or adiabatic effect, its position and thickness are adjustable, and thickness can be between 150～250 microns.

More than be that preferred embodiments to the utility model specifies; But the invention is not limited to said embodiment; Those of ordinary skill in the art also can make all equivalent modifications or replacement under the prerequisite of the utility model spirit, modification that these are equal to or replacement all are included in the application's claim institute restricted portion.

Claims

1. crooked Zinc alloy casting gravitational casting pouring gate structure; Comprise and dig a die ontology that bends to the die cavity of arc, the string that said arc two ends line constitutes up, arc is down; Be equipped with the core (2) of unsettled, shape and die cavity coupling in the die cavity; Space between core (2) and die cavity wall constitutes forming wall chamber (1), it is characterized in that: said die ontology also includes running channel (4) and goes out running channel (5), and the two is communicated with the two ends of forming wall chamber (1) respectively.

2. crooked Zinc alloy casting gravitational casting pouring gate structure according to claim 1 is characterized in that: saidly go into running channel (4), go out the position that running channel (5) is communicated with the two ends of forming wall chamber (1) respectively, be provided with surge chamber (6).