CN114406199A - Gating system for sand casting - Google Patents
Gating system for sand casting Download PDFInfo
- Publication number
- CN114406199A CN114406199A CN202210083833.3A CN202210083833A CN114406199A CN 114406199 A CN114406199 A CN 114406199A CN 202210083833 A CN202210083833 A CN 202210083833A CN 114406199 A CN114406199 A CN 114406199A
- Authority
- CN
- China
- Prior art keywords
- channel
- cross
- pouring
- slag collecting
- communicated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention belongs to the technical field of casting, and particularly relates to a pouring system for sand mold casting, which comprises a sprue, a cross gate and an inner gate, wherein the sprue is communicated with the cross gate, and the cross gate comprises a first cross gate, a slag collecting channel, a flow blocking channel and a second cross gate; the first cross pouring channel is communicated with the choke channel through a slag collecting channel, and the slag collecting channel is communicated with the second cross pouring channel through the choke channel; the second horizontal pouring gate is communicated with the inner pouring gate, and the inner pouring gate is communicated with the casting cavity. The slag collecting channel mainly enables molten metal to enter the slag collecting channel to achieve the purposes of floating slag and reducing speed, and the flow blocking channel further achieves the purposes of blocking slag and reducing speed, so that the molten metal entering the second cross runner is high in purity and stable in flow speed, and then enters the casting cavity through the inner runner to obtain a high-quality casting.
Description
Technical Field
The invention belongs to the technical field of casting, and particularly relates to a pouring system for 3D printing sand casting.
Background
In the casting production process of castings, the design form of a gating system is limited by the conditions of sand box size, casting quality requirements, cost requirements and the like, wherein a cross gate is used as the link of the gating system with the largest requirements on tooling and cost, and the requirements are met while the quality benefit is considered in the design process; the runner cannot be designed to be completely straight through during design, the runner needs to be designed along with the shape, and particularly for rectangular castings such as a rack and an oil pan, meanwhile, due to the singleness of molding materials of a 3D printing sand mold, refractory bricks and ceramic tubes cannot be placed to relieve the impact force of molten iron, and the runner with corners generates the problems of sand washing, air entrainment, slag formation and the like in the molding process, and the structure of a pouring system in the prior art is shown in an attached drawing 1.
Disclosure of Invention
The invention aims to provide a pouring system for sand mold casting, wherein a slag collecting channel and a choke channel are arranged in a horizontal pouring channel to solve the problems of sand washing, air entrainment, slag formation and the like generated in the process of filling a mold by the horizontal pouring channel with a corner.
A pouring system for sand casting comprises a sprue, a cross gate and an ingate, wherein the sprue is communicated with the cross gate, and the cross gate comprises a first cross gate, a slag collecting channel, a flow blocking channel and a second cross gate; the first cross pouring channel is communicated with the flow blocking channel through a slag collecting channel, and the slag collecting channel is communicated with the second cross pouring channel through the flow blocking channel; the second cross pouring channel is communicated with the inner pouring channel, and the inner pouring channel is communicated with the casting cavity. The slag collecting channel mainly enables molten metal to enter the slag collecting channel to achieve the purposes of floating slag and reducing speed, and the flow blocking channel further achieves the purposes of blocking slag and reducing speed, so that the molten metal entering the second cross runner is high in purity and stable in flow speed, and then enters the casting cavity through the inner runner to obtain a high-quality casting.
Preferably, the first runner and the second runner are communicated in an intersecting manner, that is, the first runner and the second runner are not on the same horizontal line and are communicated at a certain angle; the connecting part of the first cross pouring channel and the second cross pouring channel is provided with the slag collecting channel, and the flow blocking channel and the second cross pouring channel can be arranged into an integrated structure; the connecting angle between the first cross gate and the second cross gate can be set according to actual working conditions, and the metal liquid with high purity can be obtained at any angle by adopting the connecting mode, so that a high-quality casting is obtained.
Preferably, the slag collecting channel is of a variable diameter cylindrical structure in the vertical direction, and the diameter of the top of the slag collecting channel is larger than that of the bottom of the slag collecting channel; therefore, when the molten metal enters the cylindrical slag collecting channel from the first cross gate, a rotary trapped vortex is formed, gas entrainment is prevented, and the effects of scum and filter residue are achieved.
Preferably, the diameter of the top of the slag collecting channel is larger than that of the straight pouring channel, wherein the diameter of the top of the slag collecting channel is 2 to 2.5 times that of the straight pouring channel, and the diameter of the bottom of the slag collecting channel is 1.5 to 2 times that of the straight pouring channel; the size of the slag collecting channel is designed according to the size of the sprue, so that the minimum sectional area of the slag collecting channel is larger than the sectional area of the sprue, and scum and filter residues are facilitated.
Preferably, the height of the slag collecting channel is 1.2 to 1.5 times of the diameter of the bottom of the slag collecting channel, and the slag collecting channel is arranged to be narrow and high, so that scum is facilitated.
Preferably, the height of the first cross pouring channel is smaller than that of the slag collecting channel.
Preferably, the height of the first cross runner is set to be two thirds of the height of the slag collecting channel.
Preferably, the height of the flow blocking channel is smaller than the height of the second runner.
Preferably, the height of the flow blocking channel is set to be one fourth of the height of the slag collecting channel.
Preferably, the maximum horizontal dimension of the cross section of the first cross runner and the second cross runner along the molten metal flowing direction is smaller than the maximum vertical dimension, that is, the first cross runner and the second cross runner are arranged in a narrow and high structure, so that the molten metal is prevented from flocculating and flowing, and stable flow is realized.
According to the pouring system provided by the invention, the round platform type slag collecting channel is additionally arranged at the corner of the transverse pouring channel, so that molten metal flows into the slag collecting channel tangentially, circles around in the slag collecting channel to reduce the speed, and flows into the second transverse pouring channel and the inner pouring channel after being blocked by the flow blocking channel, the molten metal with stable flow speed and high purity is obtained to fill the casting cavity, and the quality of a casting is obviously improved.
Drawings
FIG. 1 is a schematic diagram of a prior art gating system;
FIG. 2 is a schematic structural diagram of a gating system according to an embodiment of the present application;
100-straight pouring channel; 200-horizontal pouring channel; 300-ingate; 210-a first runner; 220-slag collecting channel; 230-flow blocking channel; 240-second runner.
Detailed Description
In order to facilitate an understanding of the invention, a more complete description of the invention will be given below with reference to the accompanying drawings, in which preferred embodiments of the invention are shown, but which can be implemented in many different forms and are not limited to the embodiments described herein, but rather are provided for the purpose of enabling a more complete understanding of the disclosure of the invention.
The embodiment mainly relates to a pouring system for 3D printing sand casting with a cross runner having a corner, and the pouring system is shown in figure 2 and comprises a sprue 100, a cross runner 200 and an ingate 300, wherein the cross runner 200 has a corner structure and divides the cross runner 200 into a first cross runner 210, a slag collecting channel 220, a flow blocking channel 230 and a second cross runner 240; the first cross gate 210 is communicated with the sprue 100, the first cross gate 210 is communicated with the sprue blocking channel 230 through the slag collecting channel 220, the slag collecting channel 220 is communicated with the second cross gate 240 through the sprue blocking channel 230, the second cross gate 240 is communicated with the inner gate 300, and the inner gate 300 is communicated with the casting cavity.
Specifically, the cross runner 200 mainly plays a role in slag blocking and flow stabilizing, and the maximum horizontal dimension of the cross section of the first cross runner 210 and the second cross runner 240 in the molten metal flowing direction is smaller than the maximum vertical dimension, that is, the first cross runner 210 and the second cross runner 240 are in a columnar structure, and the width dimension is smaller than the height dimension, that is, the cross section is set to be in a narrow and high structure; the first horizontal pouring channel 210 is communicated with the second horizontal pouring channel 240 in an intersecting manner, namely at a certain angle, the slag collecting channel 220 is arranged at the corner, the vertical direction of the slag collecting channel 220 is a reducing cylindrical structure which gradually becomes smaller from the top to the bottom, in the pouring process, the molten metal flows into the slag collecting channel 220 from the first horizontal pouring channel 210 in a tangential direction, the molten metal turns to flow in the slag collecting channel 220 to form a whirling trapped vortex, the air entrainment is effectively prevented, and the functions of floating slag and filter residue are achieved; further, the molten metal can better enter the slag collecting channel to generate a rotary trapped vortex only if the diameter of the top of the slag collecting channel is larger than that of the bottom of the slag collecting channel, so that the molten metal floats upwards and the top of the slag collecting channel.
The specific size requirements of the slag collection channel 220 are as follows: the diameter of the top of the slag collecting channel 220 is larger than that of the sprue 100, the diameter of the top of the slag collecting channel 220 is 2 to 2.5 times that of the sprue 100, and the diameter of the bottom of the slag collecting channel 220 is 1.5 to 2 times that of the sprue 100; the height of the slag collection channel 220 is 1.2 to 1.5 times of the diameter of the bottom; the size of the slag collecting channel 220 is designed according to the size of the straight pouring gate 100, so that the minimum sectional area of the slag collecting channel 220 is larger than the sectional area of the straight pouring gate 100, and a certain height is set, namely, the slag collecting channel 220 is not too small and too short to play a role of scum, and the process yield is not greatly influenced. The height of the first cross gate 210 is smaller than that of the slag collecting channel 220, the height of the first cross gate 210 is set to be two thirds of that of the slag collecting channel 220, the size range of the cross gate connected with the circular truncated cone is specified, the molten iron can be ensured to form convolution after entering the circular truncated cone to achieve the purposes of speed reduction and scum, and meanwhile, the molten iron can be ensured not to flow out of the circular truncated cone to be blocked due to too large choked flow and to be blocked due to too small choked flow.
The flow blocking channel 230 and the second cross gate 240 can be of an integrated straight-through structure, the height of the flow blocking channel 230 is smaller than that of the second cross gate 240, and the height of the flow blocking channel 230 is set to be one fourth of that of the slag collecting channel 220, so that the flow blocking channel 230 plays a role in blocking slag, the whole pouring system has strong slag blocking capacity, and the method has important significance in improving the quality of castings and reducing the cost.
The above examples only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The pouring system for sand casting is characterized by comprising a sprue, a cross gate and an ingate, wherein the sprue is communicated with the cross gate, and the cross gate comprises a first cross gate, a slag collecting channel, a flow blocking channel and a second cross gate; the first cross pouring channel is communicated with the flow blocking channel through a slag collecting channel, and the slag collecting channel is communicated with the second cross pouring channel through the flow blocking channel; the second cross pouring channel is communicated with the inner pouring channel, and the inner pouring channel is communicated with the casting cavity.
2. A sand casting gating system according to claim 1, wherein the first runner intersects and communicates with the second runner.
3. The gating system for sand casting according to claim 2, wherein the slag collecting channel is of a reducing cylinder structure in the vertical direction.
4. A gating system for sand casting according to claim 3, wherein a top diameter of the sprue is larger than a diameter of the sprue.
5. A gating system for sand casting according to claim 3, wherein the diameter of the top of the slag collection channel is larger than the diameter of the bottom.
6. A gating system for sand casting according to claim 1, wherein the height of the first runner is smaller than the height of the slag collection passage.
7. A gating system for sand casting according to claim 6, wherein a height of the first runner is set to two thirds of a height of the slag collection passage.
8. A gating system for sand casting according to claim 7, wherein the height of the dam is smaller than the height of the second runner.
9. A gating system for sand casting according to claim 8, wherein a height of the choke flow passage is set to be one quarter of a height of the slag collection passage.
10. A gating system for sand casting according to any one of claims 1 to 9, wherein a maximum dimension in a horizontal direction of a cross section of the second runner in a molten metal flowing direction is smaller than a maximum dimension in a vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210083833.3A CN114406199A (en) | 2022-01-27 | 2022-01-27 | Gating system for sand casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210083833.3A CN114406199A (en) | 2022-01-27 | 2022-01-27 | Gating system for sand casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114406199A true CN114406199A (en) | 2022-04-29 |
Family
ID=81278158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210083833.3A Pending CN114406199A (en) | 2022-01-27 | 2022-01-27 | Gating system for sand casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114406199A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2754479A1 (en) * | 1996-10-15 | 1998-04-17 | Fonderie Ctr Tech Ind | Metal casting feed channel regulating flow and trapping light dross |
| CN102319891A (en) * | 2011-09-13 | 2012-01-18 | 中国科学院金属研究所 | Gating system capable of effectively controlling air entrainment and slag entrainment and design method thereof |
| CN203725702U (en) * | 2014-01-17 | 2014-07-23 | 扬州峰明金属制品有限公司 | Aluminum alloy sand mould casting gap-type gating system |
| CN203737942U (en) * | 2014-03-10 | 2014-07-30 | 长沙金龙铸造实业有限公司 | Nodular cast iron well cover pouring system |
| CN104690232A (en) * | 2015-04-03 | 2015-06-10 | 山东康迈信机械有限公司 | Static pressure line double-brake-drum rotary casting device |
| CN205834115U (en) * | 2016-05-26 | 2016-12-28 | 刘天平 | A kind of sand mo(u)ld structure of tubular article foundry goods |
| CN208450529U (en) * | 2018-06-25 | 2019-02-01 | 宁波拓铁机械有限公司 | Cast safe riser |
| CN208600669U (en) * | 2018-07-17 | 2019-03-15 | 阜新宏顺机械有限公司 | A kind of hydraulic castings system for casting and pouring |
| CN209578064U (en) * | 2018-12-05 | 2019-11-05 | 泉州市恒通机械配件有限公司 | The integrated cast structure of excavator driving wheel casting |
| CN212398009U (en) * | 2020-05-11 | 2021-01-26 | 江苏精棱铸锻股份有限公司 | Runner of marine engine piston casting |
-
2022
- 2022-01-27 CN CN202210083833.3A patent/CN114406199A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2754479A1 (en) * | 1996-10-15 | 1998-04-17 | Fonderie Ctr Tech Ind | Metal casting feed channel regulating flow and trapping light dross |
| CN102319891A (en) * | 2011-09-13 | 2012-01-18 | 中国科学院金属研究所 | Gating system capable of effectively controlling air entrainment and slag entrainment and design method thereof |
| CN203725702U (en) * | 2014-01-17 | 2014-07-23 | 扬州峰明金属制品有限公司 | Aluminum alloy sand mould casting gap-type gating system |
| CN203737942U (en) * | 2014-03-10 | 2014-07-30 | 长沙金龙铸造实业有限公司 | Nodular cast iron well cover pouring system |
| CN104690232A (en) * | 2015-04-03 | 2015-06-10 | 山东康迈信机械有限公司 | Static pressure line double-brake-drum rotary casting device |
| CN205834115U (en) * | 2016-05-26 | 2016-12-28 | 刘天平 | A kind of sand mo(u)ld structure of tubular article foundry goods |
| CN208450529U (en) * | 2018-06-25 | 2019-02-01 | 宁波拓铁机械有限公司 | Cast safe riser |
| CN208600669U (en) * | 2018-07-17 | 2019-03-15 | 阜新宏顺机械有限公司 | A kind of hydraulic castings system for casting and pouring |
| CN209578064U (en) * | 2018-12-05 | 2019-11-05 | 泉州市恒通机械配件有限公司 | The integrated cast structure of excavator driving wheel casting |
| CN212398009U (en) * | 2020-05-11 | 2021-01-26 | 江苏精棱铸锻股份有限公司 | Runner of marine engine piston casting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207857782U (en) | A kind of cast steel running gate system | |
| CN206605009U (en) | Annular cast running gate system | |
| CN206200080U (en) | Running gate system | |
| CN110523926A (en) | A kind of model structure and casting technique of sand core molding running gate system | |
| CN106424576A (en) | Spiral-flow type casting device based on bottom casting | |
| CN201841251U (en) | Four cylinder engine die-casting gate, gate runner structure | |
| CN107838375B (en) | Cast steel gating system | |
| CN110039007A (en) | A kind of cylinder casting running gate system | |
| CN204975210U (en) | Disappearance mould filters casting device | |
| CN105598376B (en) | Combined type pouring basin | |
| CN114406199A (en) | Gating system for sand casting | |
| CN110064733A (en) | A kind of castings production running gate system | |
| CN206936286U (en) | A kind of foundry pouring cup with filter | |
| CN203437595U (en) | Gating system | |
| CN103464687A (en) | Pouring system as well as novel casting method of glass mold | |
| CN216370070U (en) | Pouring cup for casting | |
| CN106216607B (en) | A kind of casting bottom pouring system | |
| CN210146930U (en) | Riser-free pouring system | |
| CN206519538U (en) | Molten iron filter | |
| CN213052641U (en) | Novel pouring cup for casting industry | |
| CN206811088U (en) | A kind of sprue cup | |
| CN213613958U (en) | Casting model structure for reducing defects of product air holes and slag holes | |
| CN211218561U (en) | Pouring cup for casting | |
| CN204975209U (en) | Reductor body shape casting device of preapring for an unfavorable turn of events | |
| CN216065431U (en) | Gate bar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |