CN117300068A - Metal casting mould - Google Patents
Metal casting mould Download PDFInfo
- Publication number
- CN117300068A CN117300068A CN202311588889.5A CN202311588889A CN117300068A CN 117300068 A CN117300068 A CN 117300068A CN 202311588889 A CN202311588889 A CN 202311588889A CN 117300068 A CN117300068 A CN 117300068A
- Authority
- CN
- China
- Prior art keywords
- type sub
- angle type
- die
- acute angle
- metal casting
- 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
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- 238000005058 metal casting Methods 0.000 title claims abstract description 28
- 230000001154 acute effect Effects 0.000 claims abstract description 39
- 238000005266 casting Methods 0.000 claims description 13
- 230000003068 static effect Effects 0.000 claims description 11
- 238000010276 construction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006115 industrial coating Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to the technical field of metal casting, in particular to a metal casting die, which comprises: the inner mold is a cylindrical structure formed by staggered arrangement of a plurality of acute angle type sub-molds and a plurality of obtuse angle type sub-molds; a through hole is arranged in the center of the cylindrical structure; a spiral structure corresponding to the inner spiral groove on the annular part is arranged on the periphery of the cylindrical structure; on the acute angle type sub-mold, the angles of the two side surfaces contacted with the two adjacent obtuse angle type sub-molds are arranged at an acute angle after extending and intersecting in the direction away from the through hole; on the obtuse angle type sub-mold, the angles of the two side surfaces contacted with two adjacent acute angle type sub-molds are arranged at an obtuse angle after extending and intersecting in the direction away from the through hole; the application can ensure that the acute angle type sub-die and the obtuse angle type sub-die are mutually pressed when the inner die is installed; in addition, the acute angle type sub-die is firstly separated during demoulding, and then the obtuse angle type sub-die is separated, so that smooth demoulding can be realized.
Description
Technical Field
The invention relates to the technical field of metal casting, in particular to a metal casting die.
Background
The composite molecular pump has the characteristics of high pumping speed and high compression ratio. With the rapid development of industries such as industrial coating and semiconductors, the application of the composite molecular pump is more and more extensive. The drag stage in the compound molecular pump is the key to achieving high compression ratio of the compound turbomolecular pump. For the barrel type traction stage in the traction stages, a molecular pump static traction ring is generally adopted for realizing. The inner wall of the static traction ring of the molecular pump is provided with a plurality of spiral grooves. If the molecular pump static traction ring is manufactured by adopting a machining mode, the molecular pump static traction ring is generally formed by turning and milling a bar stock, so that the machining working hour is long, and materials are wasted. If the static traction ring of the molecular pump is manufactured in a casting mode, the demolding is difficult due to the spiral groove structure arranged on the inner wall.
Disclosure of Invention
Therefore, the technical problems to be solved by the invention are as follows: when the molecular pump static traction ring with the internal spiral groove is manufactured by adopting a casting mode, how to overcome the difficulty of demoulding.
In order to solve the above technical problems, the present invention provides a metal casting mold suitable for casting an annular part having an inner spiral groove, the metal casting mold comprising:
the inner mold is a cylindrical structure formed by staggered arrangement of a plurality of acute angle type sub-molds and a plurality of obtuse angle type sub-molds; a through hole is arranged in the center of the cylindrical structure; a spiral structure corresponding to the inner spiral groove on the annular part is arranged on the periphery of the cylindrical structure so as to form the inner spiral groove on the annular part; on the acute angle type sub-mold, the angles of the two side surfaces contacted with the two adjacent obtuse angle type sub-molds are arranged at an acute angle after extending and intersecting in the direction away from the through hole; on the obtuse angle type sub-mold, the angles of the two side surfaces contacted with two adjacent acute angle type sub-molds are arranged at an obtuse angle after extending and intersecting in the direction away from the through hole; the inner mold is suitable for moving the acute angle type sub-mold to the through hole to release when casting and demolding, so as to facilitate demolding.
Optionally, the method further comprises:
and a blind hole is formed in the center of the lower die, and the part, close to the bottom, of the outer periphery of the inner die is attached to the inner wall of the blind hole.
Optionally, the method further comprises:
an outer mold which is a split structure with a cavity formed by surrounding a plurality of outer molds; the shape of the inner periphery of the cavity corresponds to the shape of the annular part so as to form the shape of the annular part; an annular boss coaxially arranged with the through hole is arranged on the lower die; the part of the inner periphery of the cavity close to the bottom is attached to the periphery of the annular boss.
Optionally, the lower die is of a disc-shaped structure.
Optionally, the outer mold is two outer molds symmetrically arranged.
Optionally, the top of the inner mold is higher than the outer mold.
Optionally, the spiral structure is disposed near the bottom end of the inner mold.
Optionally, the size of the acute angle type sub-die is smaller than the size of the obtuse angle type sub-die.
Optionally, the number of the acute angle type sub-mold is four, and the number of the obtuse angle type sub-mold is four.
Optionally, the annular part with the inner spiral groove is a molecular pump static traction ring.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. the metal casting mold provided by the invention is suitable for casting an annular part with an inner spiral groove, and comprises: the inner mold is a cylindrical structure formed by staggered arrangement of a plurality of acute angle type sub-molds and a plurality of obtuse angle type sub-molds; a through hole is arranged in the center of the cylindrical structure; a spiral structure corresponding to the inner spiral groove on the annular part is arranged on the periphery of the cylindrical structure so as to form the inner spiral groove on the annular part; on the acute angle type sub-mold, the angles of the two side surfaces contacted with the two adjacent obtuse angle type sub-molds are arranged at an acute angle after extending and intersecting in the direction away from the through hole; on the obtuse angle type sub-mold, the angles of the two side surfaces contacted with two adjacent acute angle type sub-molds are arranged at an obtuse angle after extending and intersecting in the direction away from the through hole; the inner die is suitable for moving the acute angle type sub die to the through hole to be separated when casting and demolding, so that demolding is facilitated; by adopting the technical scheme, when the inner die is installed, the acute angle type sub-die and the obtuse angle type sub-die can be ensured to be mutually pressed; when the shape and the quality of the spiral groove in the annular part are ensured, the acute angle type sub-die is firstly separated during the demolding, and then the obtuse angle type sub-die is separated, so that the smooth demolding can be realized.
2. The metal casting mold provided by the invention further comprises: the center of the lower die is provided with a blind hole, and the part of the outer periphery of the inner die close to the bottom end is attached to the inner wall of the blind hole; by adopting the technical scheme, the blind hole of the lower die is used for conveniently, accurately and reliably fixing the inner die.
3. The metal casting mold provided by the invention further comprises: an outer mold which is a split structure with a cavity formed by surrounding a plurality of outer molds; the shape of the inner periphery of the cavity corresponds to the shape of the annular part so as to form the shape of the annular part; an annular boss coaxially arranged with the through hole is arranged on the lower die; the part of the inner periphery of the cavity close to the bottom end is attached to the periphery of the annular boss; by adopting the technical scheme, the outer die demolding device is beneficial to outer die demolding, and the outer die is convenient, accurate and reliable to fix through the annular boss of the lower die.
4. The lower die is of a disc-shaped structure; by adopting the technical scheme, the application provides stable basic support for the whole metal casting die.
5. The outer mold is two outer mold dies which are symmetrically arranged; by adopting the technical scheme, the external mold stripping is realized by using as few split quantity as possible, the complexity of the metal casting mold is reduced, the processing difficulty is reduced, and the cost is further reduced.
6. The top of the inner die is higher than the outer die; by adopting the technical scheme, the internal mold is convenient to take out.
7. The spiral structure is arranged near the bottom end of the inner die; the technical scheme is suitable for the molten metal to flow to the bottom, and the inner spiral groove of the annular part is formed at the position close to the bottom.
8. The size of the acute angle type sub-die is smaller than that of the obtuse angle type sub-die; by adopting the technical scheme, the acute angle type sub-die is conveniently and easily moved, so that the die is smoothly demoulded, and the labor intensity is reduced.
9. The annular part with the inner spiral groove is a molecular pump static traction ring; by adopting the technical scheme, the casting qualified molecular pump static traction ring is cast, and the demolding is smooth.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a metal casting mold provided in an embodiment of the present invention;
FIG. 2 is a schematic top view of an inner mold according to an embodiment of the present invention;
fig. 3 is a schematic perspective view of an inner mold according to an embodiment of the present invention.
Reference numerals illustrate:
1. an inner mold; 2. an outer mold; 3. a lower die; 4. acute angle type sub-die; 5. an obtuse angle type sub-die; 6. a spiral structure; 7. a cylindrical structure; 8. a through hole; 9. a blind hole; 10. an outer mold; 11. an annular boss.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
One embodiment of a metal casting mold as shown in fig. 1 to 3 includes: an inner die 1, a lower die 3 and an outer die 2. The metal casting die is suitable for casting annular parts with inner spiral grooves; specifically, the annular part with the inner spiral groove can be a static traction ring of the molecular pump.
As shown in fig. 2 and fig. 3, the inner mold 1 is a cylindrical structure 7 formed by staggering and surrounding a plurality of acute angle type sub-molds 4 and a plurality of obtuse angle type sub-molds 5; specifically, the number of the acute angle type sub-mold 4 is four, and the number of the obtuse angle type sub-mold 5 is four. A through hole 8 is arranged in the center of the cylindrical structure 7; a spiral structure 6 corresponding to the inner spiral groove on the annular part is arranged on the periphery of the cylindrical structure 7 so as to form the inner spiral groove on the annular part; on the acute angle type sub-die 4, the angles of the two side surfaces contacted with the two adjacent obtuse angle type sub-dies 5 are arranged at an acute angle after extending and intersecting in the direction away from the through hole 8; on the obtuse angle type sub-mold 5, the angles of the two side surfaces contacting with two adjacent acute angle type sub-molds 4 are arranged at an obtuse angle after extending and intersecting in the direction away from the through hole 8. The inner mold 1 is suitable for moving the acute angle type sub mold 4 to the through hole 8 to release during casting and demolding, so as to facilitate demolding. Further, the size of the acute angle type sub-mold 4 is smaller than the size of the obtuse angle type sub-mold 5.
As shown in fig. 1 and 3, a blind hole 9 is provided at the center of the lower die 3, and specifically, the lower die 3 may have a disc structure. The part of the periphery of the inner mold 1 close to the bottom is attached to the inner wall of the blind hole 9. The outer die 2 is a split structure formed by encircling a plurality of outer dies 10 and provided with cavities; specifically, the outer mold 2 may be two outer mold 10 symmetrically arranged to form a symmetrical mold opening structure. The shape of the inner periphery of the cavity corresponds to the shape of the annular part so as to form the shape of the annular part; an annular boss 11 coaxially arranged with the through hole 8 is arranged on the lower die 3; the part of the inner periphery of the cavity close to the bottom is attached to the periphery of the annular boss 11. Further, the top of the inner mold 1 is higher than the outer mold 2. The spiral structure 6 is arranged near the bottom end of the inner mold 1.
The main use process of the metal casting mold is briefly described as follows:
1. firstly, eight acute angle type sub-dies 4 and obtuse angle type sub-dies 5 with different shapes are installed at a blind hole 9 in the center of the lower die 3 in a staggered combination mode.
2. Two outer dies 10 are mounted at the annular boss 11 of the lower die 3.
3. And after the metal casting mold is assembled, casting is performed.
4. And demolding after the casting is molded, firstly removing the outer mold 2, then performing demolding on the inner mold 1, and when the inner mold 1 is removed, firstly removing the acute angle type sub-mold 4 and then removing the obtuse angle type sub-mold 5.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (10)
1. A metal casting die adapted for casting of an annular part having an inner spiral groove, comprising:
the inner mold (1) is a cylindrical structure (7) formed by staggered arrangement of a plurality of acute angle type sub-molds (4) and a plurality of obtuse angle type sub-molds (5); a through hole (8) is arranged in the center of the cylindrical structure (7); a spiral structure (6) corresponding to the inner spiral groove on the annular part is arranged on the periphery of the cylindrical structure (7) so as to form the inner spiral groove on the annular part; on the acute angle type sub-die (4), the angles of the two side surfaces contacted with the two adjacent obtuse angle type sub-dies (5) are arranged at an acute angle after extending and intersecting in the direction away from the through hole (8); on the obtuse angle type sub-die (5), the angles of the two side surfaces contacted with two adjacent acute angle type sub-dies (4) are arranged at an obtuse angle after extending and intersecting in the direction away from the through hole (8); the inner die (1) is suitable for moving the acute angle type sub die (4) to the through hole (8) to be separated when casting and demolding are carried out, so that demolding is facilitated.
2. The metal casting mold according to claim 1, further comprising:
and a blind hole (9) is formed in the center of the lower die (3), and the part, close to the bottom, of the periphery of the inner die (1) is attached to the inner wall of the blind hole (9).
3. The metal casting mold according to claim 2, further comprising:
the outer die (2) is a split structure with a cavity formed by surrounding a plurality of outer dies (10); the shape of the inner periphery of the cavity corresponds to the shape of the annular part so as to form the shape of the annular part; an annular boss (11) which is coaxially arranged with the through hole (8) is arranged on the lower die (3); the part of the inner periphery of the cavity close to the bottom is attached to the periphery of the annular boss (11).
4. A metal casting mould according to claim 3, characterized in that the lower mould (3) is of disc-like construction.
5. A metal casting mould according to claim 3, characterized in that the outer mould (2) is two outer mould dies (10) arranged symmetrically.
6. A metal casting mould according to any one of claims 3-5, characterized in that the top of the inner mould (1) is arranged higher than the outer mould (2).
7. A metal casting mould according to claim 6, characterized in that the spiral structure (6) is arranged close to the bottom end of the inner mould (1).
8. Metal casting mould according to any one of claims 1-5, characterized in that the size of the acute angle type sub-mould (4) is smaller than the size of the obtuse angle type sub-mould (5).
9. The metal casting mold according to any one of claims 1 to 5, characterized in that the number of the acute angle type sub-molds (4) is four, and the number of the obtuse angle type sub-molds (5) is four.
10. The metal casting mold of any one of claims 1 to 5, wherein the annular part with internal helical groove is a molecular pump static traction ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311588889.5A CN117300068A (en) | 2023-11-27 | 2023-11-27 | Metal casting mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311588889.5A CN117300068A (en) | 2023-11-27 | 2023-11-27 | Metal casting mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117300068A true CN117300068A (en) | 2023-12-29 |
Family
ID=89250117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311588889.5A Pending CN117300068A (en) | 2023-11-27 | 2023-11-27 | Metal casting mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117300068A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119057015A (en) * | 2024-11-04 | 2024-12-03 | 湖南锆石新材料科技有限公司 | Large copper alloy ring self-adaptive variable-diameter metal internal mold mechanism and use method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05147082A (en) * | 1991-11-28 | 1993-06-15 | Olympus Optical Co Ltd | Mold for bore undercut processing |
| CN1785649A (en) * | 2005-12-12 | 2006-06-14 | 天津理工大学 | Contracting internal core withdrawing device used for plastic mould and its use method |
| CN201268069Y (en) * | 2008-09-17 | 2009-07-08 | 广东东亚电器有限公司 | Shrinkage internal loose core mechanism for injection mold |
| CN103407104A (en) * | 2013-08-15 | 2013-11-27 | 苏州大学 | Integral core-pulling die for lens barrel core |
| CN204487992U (en) * | 2014-11-11 | 2015-07-22 | 牟维军 | A kind of core-pulling die mechanism |
| CN107415174A (en) * | 2015-03-04 | 2017-12-01 | 刘仁义 | A kind of deep tooth internal thread demoulding mechanism injection mold and its application method |
| CN210791909U (en) * | 2019-10-08 | 2020-06-19 | 宝鸡市金城机器制造有限责任公司 | Injection mold structure for manufacturing external thread protective sleeve at pipe end of petroleum steel pipe |
-
2023
- 2023-11-27 CN CN202311588889.5A patent/CN117300068A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05147082A (en) * | 1991-11-28 | 1993-06-15 | Olympus Optical Co Ltd | Mold for bore undercut processing |
| CN1785649A (en) * | 2005-12-12 | 2006-06-14 | 天津理工大学 | Contracting internal core withdrawing device used for plastic mould and its use method |
| CN201268069Y (en) * | 2008-09-17 | 2009-07-08 | 广东东亚电器有限公司 | Shrinkage internal loose core mechanism for injection mold |
| CN103407104A (en) * | 2013-08-15 | 2013-11-27 | 苏州大学 | Integral core-pulling die for lens barrel core |
| CN204487992U (en) * | 2014-11-11 | 2015-07-22 | 牟维军 | A kind of core-pulling die mechanism |
| CN107415174A (en) * | 2015-03-04 | 2017-12-01 | 刘仁义 | A kind of deep tooth internal thread demoulding mechanism injection mold and its application method |
| CN210791909U (en) * | 2019-10-08 | 2020-06-19 | 宝鸡市金城机器制造有限责任公司 | Injection mold structure for manufacturing external thread protective sleeve at pipe end of petroleum steel pipe |
Non-Patent Citations (1)
| Title |
|---|
| 叶屋臣一: "《注射模具设计和应用》", 30 November 1989, 轻工业出版社, pages: 153 - 157 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119057015A (en) * | 2024-11-04 | 2024-12-03 | 湖南锆石新材料科技有限公司 | Large copper alloy ring self-adaptive variable-diameter metal internal mold mechanism and use method thereof |
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Application publication date: 20231229 |