CN212945277U

CN212945277U - Annular casting pouring system

Info

Publication number: CN212945277U
Application number: CN202021358367.8U
Authority: CN
Inventors: 李辉波; 彭银清
Original assignee: Sichuan Tianqi Yongda Machinery Manufacturing Co ltd
Current assignee: Sichuan Tianqi Yongda Machinery Manufacturing Co ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-04-13
Anticipated expiration: 2030-07-10

Abstract

The utility model discloses an annular casting pouring system, which comprises a sand box, a forming die and a pouring gate system; the sand box is of a polygonal frame structure, a hollow annular hole structure is arranged in the middle of the sand box, and an annular chamber matched with the annular casting is formed in the sand box; the forming die is arranged in the annular cavity chamber, and the pouring gate system is connected with the cavity of the forming die. The pouring system adopts the sand box with a hollow annular hole structure aiming at the structural characteristics of the annular casting, so that the use amount of resin sand for processing the casting can be effectively reduced, the thickness of each position of the sand mould is uniform, the uniform heat dissipation of the casting in the casting molding process is ensured, and the molding quality of a casting product is ensured; simultaneously, the pouring gate structure of the pouring system is reasonably arranged and distributed, so that the generation of vortex and turbulent flow can be prevented, the problems of secondary oxidation and inclusion caused by gas entrainment of molten metal and the like are avoided, and the defects of slag holes, looseness, shrinkage cavities and the like in castings are effectively avoided.

Description

Annular casting pouring system

Technical Field

The utility model relates to a casting technical field, in particular to annular casting piece gating system.

Background

The casting is a method of pouring molten metal into a casting cavity adapted to the shape of a part, and obtaining the part or a blank after the molten metal is cooled and solidified. Common defects in castings are slag holes, air holes, sand holes, cold shut and the like. The filter is often adopted in the casting production to filter and purify the molten metal so as to effectively filter and remove slag in the molten metal, simplify a pouring system, prevent the defect of slag holes, improve the mechanical property of the casting and reduce the machining allowance of the casting.

The existing annular casting pouring system generally comprises a pouring cup, a sprue, a cross runner and an ingate, and because the arrangement of the sprue is unreasonable, molten metal can generate turbulence and other phenomena in the pouring process, so that casting defects are caused, and the qualification rate of products is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the above-mentioned technical problem that current the gating system exists, provide an annular casting piece gating system.

In order to solve the technical problem, the utility model discloses a technical scheme as follows:

an annular casting pouring system comprises a sand box, a forming die and a pouring gate system;

the sand box is of a polygonal frame structure, a hollow annular hole structure is arranged in the middle of the sand box, and an annular chamber matched with the annular casting is formed in the sand box;

the forming die is arranged in the annular cavity chamber, and the pouring gate system is connected with the cavity of the forming die.

Furthermore, the sand box comprises an upper box and a lower box, the lower box is a cavity structure with an opening at one end, and a hole structure is arranged in the middle of the lower box; the upper box is of a frame cover plate-shaped structure matched with the lower box, a hole structure is arranged in the middle of the upper box, and an annular partition plate is arranged on the inner side of the upper box at the position of the hole structure.

Further, the section of the annular partition plate is D-shaped.

Further, the runner system comprises a straight runner, a first cross runner, a second cross runner and an inner runner which are respectively arranged on the inner side of the molding die cavity; the sprue and the first cross gate are arranged at one side of the annular hole structure of the sand box, two ends of the first cross gate are respectively provided with a filter, two second cross gates are symmetrically arranged at two sides of the sprue, the filters are respectively connected with the second cross gates at two sides through ceramic tubes, the second cross gates are respectively provided with a plurality of ingates, and the ingates are uniformly distributed on the second cross gates.

Further, the second horizontal pouring channel is of an arc-shaped structure, and the ingates on the second horizontal pouring channel are symmetrically arranged relative to the straight pouring channel.

Furthermore, the ingate is obliquely arranged on the second cross gate towards one side direction, and the included angle between the ingate and the tangent line of the ingate at the corresponding position on the second cross gate is the same.

Furthermore, the filters are respectively connected with one end part of the second cross pouring channel, and the ingates are respectively arranged towards the direction of one end of the second cross pouring channel connected with the filters in an inclined mode.

Furthermore, a pouring channel is arranged on the forming die and is communicated with the second cross gate to form an inner gate.

Further, chilling blocks are uniformly distributed on the upper end portion, the lower end portion and the inner side of the forming die cavity.

The utility model discloses beneficial effect who has:

1) the utility model adopts the sand box with a hollow annular hole structure aiming at the structural characteristics of the annular casting, can effectively reduce the usage amount of resin sand for casting processing, ensures uniform thickness of each position of the sand mould, ensures uniform heat dissipation of the casting in the casting forming process and ensures the forming quality of casting products; meanwhile, the whole weight of the sand mold can be reduced, and the safety in the casting and hoisting process is well ensured.

2) The utility model discloses according to the sand box structure to the structure of watering of the gating system carry out reasonable setting and overall arrangement, the metal liquid can flow into the foundry goods die cavity steadily, reduces the impact of metal liquid to die cavity, core in the moulded die when the pouring, can prevent vortex, turbulent production, avoids the metal liquid to roll up gas and causes secondary oxidation to mix with the scheduling problem to effectively avoid the production of defects such as cinder hole, loose, shrinkage cavity in the foundry goods, effectively improved the quality of foundry goods product.

Drawings

FIG. 1 is the schematic diagram of the pouring system structure of the present invention

Fig. 2 is a schematic diagram of the arrangement structure of the runner system in the lower box in the pouring system of the present invention.

Fig. 3 is a schematic diagram of the arrangement structure of the runner system in the upper box in the pouring system of the present invention.

Fig. 4 is a schematic cross-sectional view of the middle flask of the present invention.

Fig. 5 is the schematic structural view of the cavity and the runner system of the forming mold of the present invention.

Fig. 6 is a schematic structural view of the middle runner system of the present invention.

Fig. 7 is a front view of the structure of the middle pouring gate system of the present invention.

In the figure: 101. a sprue channel 102, a first cross channel 103, a second cross channel 104, an ingate channel 105, a ceramic tube 106, a filter 107 and a chill;

200. a cavity;

301. an upper box 302, a lower box 303, an annular partition plate 304 and an annular hole structure;

alpha, and the included angle between the inner pouring channel and the tangent line of the inner pouring channel at the corresponding position on the second cross pouring channel.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments.

An annular casting gating system as shown in fig. 1, 2 and 3, comprising a flask, a forming die and a runner system; the sand box is of a polygonal frame structure, a hollow annular hole structure 304 is arranged in the middle of the sand box, and an annular chamber matched with the annular casting is formed inside the sand box; the forming die is arranged in the annular cavity chamber, and the pouring gate system is connected with the cavity of the forming die. In the embodiment, the sand box with the hollow annular hole structure is adopted, so that the use amount of resin sand for processing the casting can be effectively reduced, the thickness of each position of the sand mould is uniform, the uniform heat dissipation of the casting in the casting forming process is ensured, and the forming quality of a casting product is ensured.

As shown in fig. 2, 3 and 4, the sand box comprises an upper box 301 and a lower box 302, wherein the lower box 302 is a cavity structure with an opening at one end, and a hole structure is arranged in the middle of the lower box 302; the upper box 301 is a frame cover plate-shaped structure matched with the lower box, a hole structure is arranged in the middle of the upper box 301, an annular partition plate 303 is arranged on the inner side of the upper box at the hole structure position, the upper box is arranged at one end of an opening of the lower box, and the annular partition plate of the upper box is matched with the hole structure on the lower box, so that an annular cavity is formed in the box body of the sand box.

The section of the annular partition plate 303 in the embodiment is D-shaped, namely the annular hole structure in the middle of the sand box is D-shaped, and the arrangement of the pouring gate system in the sand box can be facilitated by adopting the structure.

As shown in fig. 5, 6 and 7, the runner system comprises a sprue 101, a first runner 102, a second runner 103 and an ingate 104, respectively, provided inside the cavity; the sprue 101 and the first cross gate 102 are arranged on one side of the center of the cavity, and the first cross gate 102 is arranged along the circumferential chordwise direction of the cavity and is arranged on the outer side of the horizontal part of the annular hole structure of the sand box. The two ends of the first cross gate 102 are respectively provided with a filter 106, the two second cross gates 102 are symmetrically arranged on two sides of the sprue 101, the filters 106 are respectively connected with the second cross gates 103 on two sides through ceramic tubes 105, the second cross gates 103 are respectively provided with a plurality of ingates 104, and the ingates 104 are uniformly distributed on the second cross gates 103 and are used for communicating the second cross gates 103 with the cavity 200.

Referring to fig. 2, the second runners 103 in this embodiment are arc-shaped structures arranged along the circumferential direction of the cavity, and the ingates 104 of the two second runners 103 are symmetrically arranged with respect to the sprue. The ingate 104 is inclined to one side direction on the second runner 103, and the included angle alpha between the ingate 104 and the tangent line of the ingate at the corresponding position on the second runner is the same. The filters 106 are connected to one end portions of the second runners 103, and the gates 104 are inclined toward one end portions of the second runners connected to the filters. Through the setting to structure between first runner, second runner, the ingate, can make during the metal liquid flows into the die cavity evenly when the pouring, fill the die cavity to can effectively reduce vortex, turbulent flow scheduling problem, have fine effect to the casting moulding quality that improves the foundry goods. Meanwhile, the pouring gate system adopting the structure can be conveniently arranged in the hollow sand box, the whole weight of the whole pouring system can be reduced, and the labor intensity of workers is reduced.

In this embodiment, the forming mold is provided with a pouring channel, and the pouring channel is respectively communicated with the second horizontal pouring gate to form an ingate structure of the pouring gate system. Through the pre-forming of the ingate structure on the forming die, the arrangement of the ingate structure in the gating system can be simplified, and the manufacturing time of the ingate system structure is reduced, so that the cost is saved, the casting efficiency is improved, and the labor intensity of workers can be effectively reduced.

The filters 106 are respectively disposed below both ends of the first runner 102, and are used for filtering molten metal slag in the molten metal, and buffering and adjusting the flow rate of the molten metal. The filter may be a ceramic foam filter, a fiber filter, a straight-hole filter, or the like.

As shown in fig. 2 and 3, chills 107 are uniformly arranged at the upper end part, the lower end part and the inner side of the cavity 200 along the circumferential direction of the cavity; through the reasonable setting to the chill position, further guarantee the shaping quality of foundry goods.

The present invention is not limited to the above description and drawings, but should be understood as being illustrative and not restrictive, and the technical features can be replaced and modified without creative efforts by those skilled in the art according to the technical content disclosed, all falling within the scope of the present invention.

Claims

1. The utility model provides an annular foundry goods gating system which characterized in that: comprises a sand box, a forming die and a pouring channel system;

2. An annular casting gating system according to claim 1, wherein: the sand box comprises an upper box and a lower box, the lower box is a cavity structure with an opening at one end, and a hole structure is arranged in the middle of the lower box; the upper box is of a frame cover plate-shaped structure matched with the lower box, a hole structure is arranged in the middle of the upper box, and an annular partition plate is arranged on the inner side of the upper box at the position of the hole structure.

3. An annular casting gating system according to claim 2, wherein: the section of the annular partition plate is D-shaped.

4. An annular casting gating system according to claim 1, wherein: the runner system comprises a sprue, a first cross runner, a second cross runner and an inner runner which are respectively arranged at the inner side of the molding die cavity; the sprue and the first cross gate are arranged at one side of the annular hole structure of the sand box, two ends of the first cross gate are respectively provided with a filter, two second cross gates are symmetrically arranged at two sides of the sprue, the filters are respectively connected with the second cross gates at two sides through ceramic tubes, the second cross gates are respectively provided with a plurality of ingates, and the ingates are uniformly distributed on the second cross gates.

5. An annular casting gating system according to claim 4, wherein: the second horizontal pouring channel is of an arc-shaped structure, and the inner pouring channels on the second horizontal pouring channel are symmetrically arranged relative to the straight pouring channel.

6. An annular casting gating system according to claim 4, wherein: the ingate is obliquely arranged on the second cross gate towards one side direction, and the included angle between the ingate and the tangent line of the ingate at the corresponding position on the second cross gate is the same.

7. An annular casting gating system according to claim 6, wherein: the filter is respectively connected with one end part of the second cross pouring channel, and the inner pouring channel is respectively arranged towards the direction of one end of the second cross pouring channel connected with the filter in an inclined mode.

8. An annular casting gating system according to claim 4, wherein: and a pouring channel is arranged on the forming die and is communicated with the second cross gate to form an ingate.

9. An annular casting gating system according to claim 4, wherein: and chills are uniformly distributed at the upper end part, the lower end part and the inner side of the forming die cavity.