CN109550902B - Casting mould - Google Patents
Casting mould Download PDFInfo
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- CN109550902B CN109550902B CN201811634454.9A CN201811634454A CN109550902B CN 109550902 B CN109550902 B CN 109550902B CN 201811634454 A CN201811634454 A CN 201811634454A CN 109550902 B CN109550902 B CN 109550902B
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- cavity
- groove
- sprue
- die
- die body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
-
- 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
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- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The present invention relates to a casting mold. The casting mold of the invention comprises: a first mold body and a second mold body, the first mold body and the second mold body may beBuckling and forming a parting surface; a parting surface of the first die body is concave to form a forming cavity, a parting surface of the second die body is concave to form a sprue and a long strip-shaped communicating groove, and a surface of the communicating groove in the length direction is communicated with the sprue; when the first die body is buckled with the second die body, the communicating groove is communicated with the bottom surface of the cavity. The cross-sectional area of the communication groove along the width direction is less than 5mm2. The casting die has the advantages that manual polishing is not needed, and the yield is improved.
Description
Technical Field
The invention relates to a mold, in particular to a casting mold.
Background
The intelligent degree of processing of the gray iron support of the compressor cylinder of modern household air conditioners and refrigerators is higher and higher. In the prior art, one special multifunctional combined machine for processing the gray iron piece is a production line, the casting of the gray iron piece is fed from a blank, a semi-finished product is discharged, the whole process is full-automatic, and the special machine has very high requirement on the size consistency of the casting due to the requirement of automatic processing.
The outer surface of a casting on the existing air conditioner compressor cylinder comprises two bottom surfaces and one side surface, and grooves penetrating the two bottom surfaces can be formed, edges can be formed at the transition positions of the two bottom surfaces and the side surface, and the casting technology is divided into two types. The first is the edge pressing process, and specifically, the cavity and the sprue of the mold are divided into two halves, one half being located in the upper box and the other half being located in the lower box. The blank pressing process has the advantages that the mold patterns and the sprue are distributed on the two half mold plates, and heat loss is relatively uniform after pouring. The defects are that the production speed is high, the water inlet area of the blank pressing is large, the sprue part of the cast and the sprue when the cast and the sprue are torn is easy to cause meat deficiency, in addition, the cast and a pouring system (the sprue) are not easy to separate, and can be separated only by knocking, and the part knocked is difficult to fix, so that the meat deficiency of the casting sprue is aggravated. Modern air condition compressor casting is all pursuing lightweight, and the machining allowance of casting design is few, and the serious meat deficiency of casting leads to the defective products to increase. The second is that the edge that connects of foundry goods is intake, the die cavity and the gating system (sprue) of model all concentrate on a box, the width direction of the cross-section of the runner of this kind of technology is wide, in order to reduce the meat deficiency of foundry goods, the stress groove has been designed on the runner of foundry goods, from stress groove fracture when tearing, most foundry goods can drop automatically, but the runner of foundry goods remains the standard that highly exceeds actual demand, must artifically polish the back and can reach the requirement, because the quality of artifically polishing foundry goods runner is difficult to the management and control, leak to grind and excessively can influence intelligent robot's clamping with the grinding, can not adapt to intelligent machine's processing. No matter which process is adopted, the structure of the die can cause the influence of meat deficiency or excessive allowance of the casting, and the yield of the casting can be influenced.
Disclosure of Invention
Accordingly, the present invention is directed to a casting mold, which has advantages of no need of manual polishing and improved yield.
A casting mold comprises a first mold body and a second mold body, wherein the second mold body can be buckled on the first mold body and forms a parting surface; a parting surface of the first mold body is concave to form a molding cavity, a parting surface of the second mold body is concave to form a sprue and a long columnar communicating groove, and a surface in the length direction of the communicating groove is communicated with the sprue; when the first die body is buckled with the second die body, the communicating groove is communicated with the bottom surface of the cavity.
According to the casting mold, the cavity and the communicating groove are respectively arranged on the two mold bodies, so that the communicating groove is connected with the bottom surface of the cavity, and the pouring gate enters from the bottom surface of the cavity, so that the casting and the sprue are not broken to cause excess. The casting processed by the casting mold disclosed by the invention is easy to fall off from casting equipment, manual knocking is not needed, the pouring gate is basically flat, and the casting can be directly boxed without polishing after shot blasting treatment.
Further, when the first die body is buckled with the second die body, the length direction of the communication groove is arranged close to the outer edge of the bottom surface of the first die cavity. The communicating groove is arranged along the edge of the cavity, so that the pouring gate is positioned at the edge of the casting, and the fracture part of the casting torn from the equipment is positioned at the edge of the casting, and the processing is easy.
Furthermore, a compensation groove is formed in the first die body along an edge of the side wall of the cavity, and when the first die body is buckled with the second die body, the compensation groove is communicated with the communication groove or the sprue. And a compensation groove is arranged for compensating the flow area of the communication groove. Because the communicating groove is arranged to be a long strip column structure, the length of the communicating groove is limited by the fracture easiness degree when the casting is formed, if the communicating groove is too long, the sprue of the casting is too long, and the casting is not easy to fracture with the sprue. In order to ensure the flow cross-sectional area of the gate, ensure that the width of the communicating groove cannot be too wide, and limit the length of the communicating groove to be too long, the problems can be solved by arranging the compensating groove. The compensation groove is arranged on the side wall of the cavity, so that the width and the area of the communication groove cannot be influenced.
Further, the maximum width of the communication groove in the width direction thereof is less than 5 mm; the maximum width of the communicating groove is less than 5mm, the width is far less than the width of the communicating groove in the prior art of 15mm or even more, and the pouring gate is narrowed, so that when the casting and the sprue are torn, excessive allowance and residue are avoided, and direct boxing is realized without grinding. In order to limit the width and height of the compensation groove, the cross-sectional area of the compensation groove along the width direction is less than 3mm2。
Further, the cavity is an annular cavity, and the communication groove and the compensation groove are arranged along the corresponding outer circle edge of the annular cavity respectively. The communicating groove needs to be arranged along the edge of the cavity so as to ensure that the casting is convenient to break when being torn.
Further, the shape of the cavity is another shape, and the cavity comprises an annular cavity and a fan-shaped cavity connected to the side wall of the annular cavity; the communicating groove is arranged along the corresponding position of the excircle edge of the fan-shaped cavity; the compensation groove is arranged along the excircle edge of the fan-shaped cavity.
Further, the outer arc length a of the fan-shaped cavity and the arc length b corresponding to the length of the communicating groove satisfy the following relation: a is 2 b. The relation between the two arc lengths is subjected to standardized processing, and the control is convenient.
Further, the outer arc length a of the fan-shaped cavity and the arc length c corresponding to the length of the compensation groove satisfy the following relation: b > c or a ═ 3 c. Through the standardized processing to length and arc length, convenient automatic control improves the product yield and the product yield of pouring.
Furthermore, the first die body is provided with two symmetrically-arranged die cavities, and when the first die body is buckled with the second die body, the two die cavities are respectively communicated with the sprue through the communicating grooves of the two die cavities. Two or more die cavities are poured simultaneously, so that the machining efficiency is improved.
Further, the sprue and the communicating groove are integrally formed, and when the first die body and the second die body are buckled, the overlapped part of the sprue and the die cavity in the vertical direction is the communicating groove. In this preferred embodiment, the communicating groove is a part of the sprue, and at this time, the communicating groove is located in the vertical direction of the cavity, and the overlapping portion of the cavity with the sprue in the vertical direction is the communicating groove, so that the sprue is communicated with the cavity through the communicating groove, and by controlling the width or the area in the width direction of the communicating groove, the ease of cutting the sprue and the cavity can be controlled, and the ease of fracture between the casting and the metal block in the sprue can be easily controlled.
For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a top view of a parting plane of a first mold body of the present invention;
FIG. 2 is a bottom view of a parting surface of a second mold body of the present invention;
FIG. 3 is a schematic view of a profile of the present invention when the first mold body is fastened to the second mold body;
FIG. 4 is a schematic view of the structure of a casting cast by the mold of the present invention;
FIG. 5 is a cross-sectional view taken along the line A-A in FIG. 3;
FIG. 6 is an enlarged view of portion I of FIG. 5;
fig. 7 is a schematic view of a variant embodiment of the partial structure I of fig. 5.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
A casting mold as shown in fig. 1 to 3, comprising a first mold body 11 and a second mold body 12, wherein the second mold body 12 can be buckled on the first mold body 11 and forms a parting surface; a forming cavity 21 is formed in the parting surface of the first die body 11, a sprue 22 and a long columnar communicating groove 23 are formed in the parting surface of the second die body 12 in a concave mode, and the surface of the communicating groove 23 in the length direction is communicated with the sprue 22; when the first mold body 11 is fastened with the second mold body 12, the communication groove 23 is communicated with the bottom surface of the cavity 21.
Further, the maximum width of the communication groove 23 in the width direction thereof is less than 5 mm.
In order to better arrange the gate at the edge of the first mold block 11, in a preferred embodiment, when the first mold block 11 is fastened with the second mold block 12, the communication groove 23 is arranged close to the outer edge of the bottom surface of the cavity 21 in the length direction.
In order to compensate the cross-sectional flow area of the connecting channel 23, in a preferred embodiment, a compensating channel 24 is formed in the first mold 11 along an edge of a sidewall of the cavity 21, and the compensating channel 24 engages with the second mold 12 when the first mold 11 is engaged with the second mold 12The communicating groove 23 or the sprue 22 communicates. Further, the cross-sectional area of the compensation groove 24 in the width direction thereof is less than 3mm2。
In order to match the communication groove 23 with the shape of the casting, in the preferred embodiment of the present embodiment, the cavity 21 includes an annular cavity and a sector cavity connected to the side wall of the annular cavity; the communication groove 23 is arranged along the corresponding position of the excircle edge of the fan-shaped cavity; the compensation groove 24 is arranged along the edge of the outer circle of the fan-shaped cavity. In other preferred embodiments, the cavity 21 is an annular cavity, and the communication groove 23 and the compensation groove 24 are respectively disposed along the outer circumferential edge of the corresponding annular cavity.
In order to standardize the processing of the casting, the standardized parameters are in accordance with the following relationships. The outer arc length a of the fan-shaped cavity and the arc length b corresponding to the length of the communicating groove 23 satisfy the following relation: a is 2 b; in addition, the outer arc length a of the fan-shaped cavity and the arc length c corresponding to the length of the compensation groove 24 satisfy the relationship: b > c or a ═ 3 c.
In order to improve the machining efficiency of the casting, in a further scheme, two cavities 21 are provided, two symmetrically-arranged cavities 21 are formed in the first die body 11, and when the first die body 11 is buckled with the second die body 12, the two cavities 21 are respectively communicated with the sprue 22 through communication grooves 23 of the two cavities 21. Of course, a longer sprue 22 may be provided, and a plurality of the cavities 21 may be sequentially provided on both sides of the sprue 22, so that a plurality of castings can be cast at a time, thereby improving the machining efficiency.
In a preferred embodiment, the sprue and the communication groove are integrally formed, and when the first mold body and the second mold body are fastened, a portion of the sprue, which overlaps the cavity in the vertical direction, is the communication groove.
The working principle of the casting die is as follows:
the second die body is buckled above the first die body, high-temperature molten metal circulates through the sprue 22, then sequentially flows through the communicating groove 23 and the compensating groove 24, and finally enters the die cavity 21, and the molten metal is cooled in the die cavity 21 to form a casting 31. The molten metal in the sprue 22 is cooled and then integrated with the casting 31 in the cavity 21, and the structure thereof is as shown in fig. 4 to 6. At this time, the range where the casting 31 and the straight solidification part 32 are connected includes the communication solidification body 33 cooled down in the communication groove 23 and the compensation solidification body 34 cooled down in the compensation groove 24, and since the width of the communication solidification body 33 and the compensation solidification body 34 is small, the maximum width thereof does not exceed 5mm, when the casting 31 and the straight solidification part 32 are torn, no fleshiness is formed on the casting 31, and no large residue needs to be polished.
The casting 31 processed according to the modified embodiment of the casting mold of the present invention shown in fig. 7 is different from the shape of the communicating groove 23 shown in fig. 6 in that the communicating groove 23 has a rectangular cross section and the cross-sectional area of the communicating groove 23 is smaller than that in fig. 6, so that the casting 31 can be easily torn to reduce the excess of the casting.
The casting mould disclosed by the invention realizes standardized production, ensures uniform size of the casting, improves the processing efficiency of the casting, does not need to polish the casting manually, and has high yield and higher yield compared with the prior art. In addition, the casting mould of the invention improves the yield of raw materials compared with the prior art and saves the cost.
The above-mentioned embodiments only express several 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.
Claims (4)
1. A casting mold, characterized in that: the die comprises a first die body and a second die body, wherein the second die body can be buckled on the first die body to form a parting surface; a parting surface of the first mold body is concave to form a molding cavity, a compensation groove is formed in the first mold body along an edge of a side wall of the molding cavity, a parting surface of the second mold body is concave to form a sprue and a long columnar communicating groove, and a surface in the length direction of the communicating groove is communicated with the sprue; when the first die body is buckled with the second die body, the communicating groove is communicated with the bottom surface of the cavity, and the compensating groove is communicated with the communicating groove or the sprue; the cavity comprises an annular cavity and a fan-shaped cavity connected to the side wall of the annular cavity; the communicating groove is arranged along the corresponding position of the excircle edge of the fan-shaped cavity; the compensation groove is arranged along the excircle edge of the fan-shaped cavity; the outer arc length a of the fan-shaped cavity and the arc length b corresponding to the length of the communicating groove satisfy the following relation: a is 2 b; the outer arc length a of the fan-shaped cavity and the arc length c corresponding to the length of the compensation groove meet the relationship: b > c or a ═ 3 c.
2. The casting mold according to claim 1, characterized in that: the maximum width of the communicating groove along the width direction is less than 5 mm; the cross-sectional area of the compensation groove along the width direction is less than 3mm2。
3. The casting mold according to claim 1 or 2, characterized in that: the first die body is provided with two symmetrically arranged die cavities, and when the first die body is buckled with the second die body, the two die cavities are respectively communicated with the sprue through communicating grooves of the two die cavities.
4. The casting mold according to claim 1 or 2, characterized in that: the sprue and the communicating groove are integrally formed, and when the first die body and the second die body are buckled, the overlapped part of the sprue and the die cavity in the vertical direction is the communicating groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811634454.9A CN109550902B (en) | 2018-12-29 | 2018-12-29 | Casting mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811634454.9A CN109550902B (en) | 2018-12-29 | 2018-12-29 | Casting mould |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109550902A CN109550902A (en) | 2019-04-02 |
| CN109550902B true CN109550902B (en) | 2020-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811634454.9A Active CN109550902B (en) | 2018-12-29 | 2018-12-29 | Casting mould |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113600756B (en) * | 2021-07-28 | 2023-06-09 | 肇庆精通机械有限公司 | Gating system for bearing casting production |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6860315B2 (en) * | 2001-07-26 | 2005-03-01 | Copeland Corporation | Green sand casting method and apparatus |
| CN101524740B (en) * | 2009-04-22 | 2012-04-25 | 安徽省宁国新宁实业有限公司 | Vertical-parting casting section die |
| CN104148587B (en) * | 2014-06-06 | 2017-06-16 | 中设集团装备制造有限责任公司 | The casting method and device of brake disc disk body and thus obtained brake disc disk body |
| CN206839043U (en) * | 2017-04-19 | 2018-01-05 | 福州六和机械有限公司 | Rear braking disk molding die |
| CN207642273U (en) * | 2017-11-24 | 2018-07-24 | 保定市立中车轮制造有限公司 | Pressure cast aluminum-alloy wheel metal die |
| CN207547544U (en) * | 2017-12-21 | 2018-06-29 | 重庆卡森科技有限公司 | A kind of casting system for automobile differential housing |
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| CN109550902A (en) | 2019-04-02 |
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