CN215090558U - Casting sand box - Google Patents
Casting sand box Download PDFInfo
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- CN215090558U CN215090558U CN202121547816.8U CN202121547816U CN215090558U CN 215090558 U CN215090558 U CN 215090558U CN 202121547816 U CN202121547816 U CN 202121547816U CN 215090558 U CN215090558 U CN 215090558U
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- box
- closing pin
- box closing
- positioning
- hole
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Abstract
The utility model provides a casting sand box. Comprises a cope flask, a drag flask and a box closing pin; the cope box is provided with a positioning hole in clearance fit with the box closing pin; the lower sand box is provided with a mounting seat, and the mounting seat is provided with a through hole for inserting a box closing pin; a stop lever movably connected with the mounting seat is arranged below the through hole and used for supporting the box closing pin; the box closing pin comprises a first positioning part, a second positioning part and a guide part which are sequentially arranged along the length direction of the box closing pin; the diameters of the first positioning part, the second positioning part and the guide part are reduced in sequence; the first positioning part is used for being matched with the through hole; the second positioning part is used for being matched with the positioning hole. The utility model discloses well mount pad and shelves pole swing joint, shelves pole are used for supporting the mould assembling round pin when the mould assembling, accomplish the mould assembling back, make the motion of shelves pole take place the position change, and the mould assembling round pin falls down from a shelves pole, are convenient for take out the mould assembling round pin from the sand box, also are convenient for promote the positioning accuracy between the upper and lower sand box simultaneously.
Description
Technical Field
The utility model relates to a part casting technical field, concretely relates to casting sand box.
Background
High manganese steel frog products are generally produced by a sand casting method. In the production process, an upper mold and a lower mold are used for producing an upper sand mold and a lower sand mold, the upper sand mold and the lower sand mold are combined to obtain a corresponding cavity, and then molten metal is poured into the cavity to obtain a casting product of the high manganese steel frog. In order to accurately position the relative positions of the upper sand mold and the lower sand mold, positioning holes are required to be formed in the sand box (the outer frame of the sand mold), box closing pins adapted to the positioning holes are manufactured, and the box closing pins are matched with the positioning holes during box closing, so that the relative positions of the upper sand mold and the lower sand mold are accurately positioned.
The mould assembling pin used at present is a straight-handle cylindrical mould assembling pin, the mould assembling pin is suitable for sand boxes with medium and small size specifications, and for sand boxes with super-large specification and length more than or equal to 10 meters, the following problems can be caused in the using process:
firstly, due to levelness error when the sand box is lifted and elastic deformation of the sand box, when the upper sand mould and the lower sand mould are combined, the box combining pin is difficult to insert into a positioning hole of the lower sand mould.
And secondly, the box closing pin is of a slender structure, the ratio of the length to the diameter of the box closing pin is generally larger than 10, and the box closing pin is easy to bend and deform in the box closing process, so that the sand mold positioning hole is damaged.
Thirdly, due to the reasons, after the sand mold is molded, the interference fit phenomenon is easy to occur between the mold closing pin and the positioning hole, so that the mold closing pin is difficult to take out from the positioning hole.
Fourthly, alignment errors between the upper sand mould and the lower sand mould are increased due to the factors, and the matching precision is difficult to guarantee.
In view of the foregoing, there is a great need for a casting flask that solves the problems of the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a casting sand box to solve the problem that the box closing pin is difficult to take out from the sand box.
In order to achieve the purpose, the utility model provides a casting sand box, which comprises an upper sand box, a lower sand box and a box closing pin; the cope box is provided with a positioning hole in clearance fit with the box closing pin; the lower sand box is provided with a mounting seat, and the mounting seat is provided with a through hole for inserting a box closing pin; and a blocking rod movably connected with the mounting seat is arranged below the through hole and used for supporting the box closing pin.
Preferably, the stop lever is connected with the mounting seat in a sliding mode, and the box closing pin is perpendicular to the stop lever.
Preferably, a cavity is arranged inside the mounting seat, and the box closing pin and the stop lever are inserted into the cavity; an opening is arranged on the wall of the cavity body.
Preferably, the box closing pin comprises a first positioning part, a second positioning part and a guide part which are sequentially arranged along the length direction of the box closing pin; the diameters of the first positioning part, the second positioning part and the guide part are reduced in sequence; the first positioning part is used for being matched with the through hole; the second positioning part is used for being matched with the positioning hole.
Preferably, an arc-shaped transition surface is arranged between the first positioning portion and the second positioning portion and between the second positioning portion and the guide portion.
Preferably, one end of the guide part, which is far away from the first positioning part, is provided with a conical guide surface.
Preferably, the ratio of the length of the box closing pin to the diameter of the first positioning part is 4-5: 1, the ratio of the length of the box closing pin to the diameter of the second positioning part is 4.5-5.5: 1, and the ratio of the length of the box closing pin to the diameter of the guide part is 5.5-6.5: 1.
Preferably, the surface of the box closing pin is provided with lubricating grease.
Preferably, the foundry flask further comprises lifting rings disposed on the cope flask and the drag flask.
Preferably, the foundry flask further comprises flask lugs arranged on the cope flask and the drag flask.
Use the technical scheme of the utility model, following beneficial effect has:
(1) the utility model discloses in, mount pad and shelves pole swing joint, shelves pole are used for supporting the mould assembling round pin when the mould assembling, accomplish the mould assembling back, make the motion of shelves pole take place the position change, and the mould assembling round pin falls down from a shelves pole, is convenient for take out the mould assembling round pin from the sand box.
(2) In the utility model, a cavity is arranged in the mounting seat, and the box closing pin and the stop lever are both inserted into the cavity; the wall of the cavity is provided with an opening, so that the box closing pin falling into the cavity can be taken out conveniently from the opening.
(3) In the utility model, the box closing pin comprises a first positioning part, a second positioning part and a guiding part which are arranged along the length direction of the box closing pin in sequence; the diameters of the first positioning part, the second positioning part and the guide part are sequentially reduced, the first positioning part, the second positioning part and the guide part are of variable cross-section structures, and the diameter of the guide part is smaller, so that the guide is convenient to guide when the box closing pin is inserted into the cope flask; the fit clearance between the first positioning part and the through hole is small, so that the box closing pin can be stably placed conveniently; the fit clearance of second location portion and locating hole is great, prevents that the mould assembling round pin from being by the tight clamp of cope flask when the mould assembling.
(4) The utility model discloses in, all be equipped with the arc transition face between first location portion and the second location portion, between second location portion and the guide part, be favorable to locating hole, through-hole and the cooperation between the round pin of closing the case, prevent to close the case round pin card and die, also can reduce the connecting stress of closing the case round pin between each portion simultaneously, be convenient for promote the life who closes the case round pin.
(5) The utility model discloses in, the ratio of the length of mould assembling pin and diameter is little than the ratio of the mould assembling pin among the prior art, has the characteristics that the rigidity is good, can avoid the mould assembling pin bending deformation to appear in the use, is applicable to the sand box mould assembling of the high manganese steel frog of super large length.
(6) The utility model discloses in, the surface of box closing pin is equipped with lubricating grease, and the frictional force when reducible box closing pin cooperates with locating hole, through-hole can effectively reduce the frictional force when closing the box.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic view of a casting flask according to an embodiment of the present application;
FIG. 2 is a cross-sectional view of an end of a casting flask in an embodiment of the present application;
FIG. 3 is an enlarged view of a portion of FIG. 2 in an embodiment of the present application;
the device comprises a cope flask 1, a cope flask 1.1, a positioning hole 2, a drag flask 2.1, a mounting seat 2.2, a through hole 2.3, a stop lever 2.4, an opening 3, a box closing pin 3.1, a first positioning part 3.2, a second positioning part 3.3, a guide part 3.4, a conical guide surface 4, a hanging ring 5 and a box lug.
Detailed Description
The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Example (b):
referring to fig. 1 to 3, the embodiment of the casting flask is applied to the casting of the overlong high manganese steel frog.
A foundry flask, see fig. 1, comprising a cope flask 1, a drag flask 2, and a box closing pin 3; a positioning hole 1.1 which is in clearance fit with the box closing pin 3 is formed in the cope flask 1; the lower sand box 2 is provided with an installation seat 2.1, the installation seat 2.1 is provided with a through hole 2.2 for inserting a box closing pin 3, and the box closing positioning between the upper sand box 1 and the lower sand box 2 is realized through the box closing pin 3; a stop lever 2.3 movably connected with the mounting seat 2.1 is arranged below the through hole 2.2 and used for supporting the box closing pin 3 during box closing, and after the box closing is finished, the stop lever 2.3 moves to change the position, so that the box closing pin 3 falls down, and the box closing pin 3 can be conveniently taken out of the sand box.
Referring to fig. 2, in this embodiment, the stopper rod 2.3 is slidably connected to the mounting seat 2.1, and the box closing pin 3 is perpendicular to the stopper rod 2.3. After the box is closed, the stop lever 2.3 is slid to the left side of the figure 2, and the box closing pin 3 falls off the stop lever 2.3 and can be taken out.
A cavity is arranged in the mounting seat 2.1, and the box closing pin 3 and the stop lever 2.3 are inserted into the cavity; the cavity wall is provided with an opening 2.4, so that an operator can conveniently take out the box closing pin 3 falling into the cavity from the opening 2.4.
Referring to fig. 3, the box closing pin 3 includes a first positioning portion 3.1, a second positioning portion 3.2 and a guiding portion 3.3, which are sequentially arranged along the length direction; the diameters of the first positioning part 3.1, the second positioning part 3.2 and the guide part 3.3 are sequentially reduced, the structure is of a variable cross section, the diameter of the guide part 3.3 is smaller, so that the guide is convenient to guide when the box closing pin 3 is inserted into the cope flask 1, and a conical guide surface 3.4 is arranged at one end of the guide part 3.3, which is far away from the first positioning part 3.1; the first positioning part 3.1 is used for being matched with the through hole 2.2, and the matching clearance between the first positioning part 3.1 and the through hole 2.2 is smaller and set to be 0.05 mm-0.15 mm, so that the box closing pin 3 can be stably placed; the second positioning part 3.2 is used for being matched with the positioning hole 1.1, the fit clearance between the second positioning part 3.2 and the positioning hole 1.1 is larger and set to be 0.2 mm-0.3 mm, and the box closing pin 3 is prevented from being clamped tightly when a box is closed.
Arc-shaped transition surfaces are arranged between the first positioning portion 3.1 and the second positioning portion 3.2 and between the second positioning portion 3.2 and the guide portion 3.3, so that matching among the positioning holes 1.1, the through holes 2.2 and the box closing pin 3 is facilitated, the box closing pin 3 is prevented from being clamped, connection stress among all portions of the box closing pin 3 can be reduced, and the service life of the box closing pin 3 is prolonged conveniently.
The ratio of the length of the box closing pin 3 to the diameter of the first positioning portion 3.1 is 4-5: 1, the ratio of the length of the box closing pin 3 to the diameter of the second positioning portion 3.2 is 4.5-5.5: 1, and the ratio of the length of the box closing pin 3 to the diameter of the second positioning portion 3.3 is 5.5-6.5: 1, and the ratio is smaller than that of the box closing pin in the prior art, so that the box closing pin has the characteristic of good rigidity, and the box closing pin 3 can be prevented from bending and deforming in the using process.
The surface of the box closing pin 3 is provided with lubricating grease, so that the friction force when the box closing pin 3 is matched with the positioning hole 1.1 and the through hole 2.2 can be reduced, and the friction force when the box is closed can be effectively reduced.
The casting sand box further comprises lifting rings 4 arranged on the cope flask 1 and the drag flask 2, so that the cope flask 1 and the drag flask 2 can be conveniently conveyed.
The casting sand box further comprises box lugs 5 arranged on the upper sand box 1 and the lower sand box 2 and used for connecting the upper sand box 1 and the lower sand box 2 after the boxes are combined so as to facilitate the next pouring.
The use method of the casting sand box comprises the following steps: inserting the stop lever 2.3 into the mounting seat 2.1, inserting the first positioning part 3.1 at the bottom of the box closing pin 3 into the through hole 2.2 of the drag flask 2, and enabling the bottom of the box closing pin 3 to be in contact with the stop lever 2.3; the cope flask 1 is reversely buckled on the drag flask 2, so that the mould assembling pin 3 is inserted into the positioning hole 1.1 of the cope flask 1, and after mould assembling is completed, the connection between the cope flask 1 and the drag flask 2 is realized through the flask ear 5; and (3) the stop lever 2.3 is pulled out in a sliding manner, the box closing pin 3 falls into a cavity in the mounting seat 2.1, and the box closing pin 3 is taken out from the cavity opening 2.4, so that the next step of pouring can be performed.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A casting sand box is characterized by comprising a cope box (1), a drag box (2) and a box closing pin (3); a positioning hole (1.1) which is in clearance fit with the box closing pin (3) is arranged on the upper sand box (1); the lower sand box (2) is provided with a mounting seat (2.1), and the mounting seat (2.1) is provided with a through hole (2.2) for inserting the box closing pin (3); a stop lever (2.3) movably connected with the mounting seat (2.1) is arranged below the through hole (2.2) and used for supporting the box closing pin (3).
2. A foundry flask according to claim 1, characterized in that the stopper rod (2.3) is slidably connected to the mounting seat (2.1) and the box closing pin (3) is perpendicular to the stopper rod (2.3).
3. A casting flask according to claim 2, wherein the mounting seat (2.1) is internally provided with a cavity, and the box closing pin (3) and the stop lever (2.3) are inserted into the cavity; an opening (2.4) is arranged on the wall of the cavity body.
4. A casting flask according to claim 1, characterized in that the box closing pin (3) comprises a first positioning portion (3.1), a second positioning portion (3.2) and a guide portion (3.3) arranged in this order along the length direction thereof; the diameters of the first positioning part (3.1), the second positioning part (3.2) and the guide part (3.3) are reduced in sequence; the first positioning part (3.1) is used for matching with the through hole (2.2); the second positioning part (3.2) is used for being matched with the positioning hole (1.1).
5. A casting flask according to claim 4, characterized in that between the first locating portion (3.1) and the second locating portion (3.2) and between the second locating portion (3.2) and the guide portion (3.3) there are curved transition surfaces.
6. A foundry flask according to claim 4, characterized in that the end of the guide (3.3) remote from the first retainer (3.1) is provided with a tapered guide surface (3.4).
7. A foundry flask according to any one of claims 4 to 6, characterized in that the ratio of the length of the box closing pin (3) to the diameter of the first locating portion (3.1) is 4 to 5:1, the ratio of the length of the box closing pin (3) to the diameter of the second locating portion (3.2) is 4.5 to 5.5:1, and the ratio of the length of the box closing pin (3) to the diameter of the guide portion (3.3) is 5.5 to 6.5: 1.
8. A casting flask according to claim 7, wherein the surface of the box closing pin (3) is provided with grease.
9. A foundry flask according to claim 1, further comprising lifting rings (4) provided on the cope flask (1) and the drag flask (2).
10. A foundry flask according to claim 1, further comprising flask lugs (5) provided on the cope flask (1) and the drag flask (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121547816.8U CN215090558U (en) | 2021-07-08 | 2021-07-08 | Casting sand box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121547816.8U CN215090558U (en) | 2021-07-08 | 2021-07-08 | Casting sand box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215090558U true CN215090558U (en) | 2021-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121547816.8U Active CN215090558U (en) | 2021-07-08 | 2021-07-08 | Casting sand box |
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| CN (1) | CN215090558U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115464098A (en) * | 2022-07-25 | 2022-12-13 | 芜湖中铁轨道装备有限公司 | Track frog casting mold and manufacturing process |
-
2021
- 2021-07-08 CN CN202121547816.8U patent/CN215090558U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115464098A (en) * | 2022-07-25 | 2022-12-13 | 芜湖中铁轨道装备有限公司 | Track frog casting mold and manufacturing process |
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