CN216607137U - Long shaft sand core positioning mechanism - Google Patents
Long shaft sand core positioning mechanism Download PDFInfo
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- CN216607137U CN216607137U CN202122915288.3U CN202122915288U CN216607137U CN 216607137 U CN216607137 U CN 216607137U CN 202122915288 U CN202122915288 U CN 202122915288U CN 216607137 U CN216607137 U CN 216607137U
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Abstract
The utility model relates to the fixing of casting sand core, in particular to a long shaft sand core positioning mechanism, comprising: connecting the sand box, the long-axis sand core, the lost foam positioning piece and the compound sand box; the connecting sand box and the compound sand box are matched to form a cavity for containing the whole long-axis sand core; one end core head of the long shaft sand core is fixedly connected into the cavity connected with the sand box, and a lost foam positioning piece is arranged on the outer side of the middle of the long shaft sand core and in the cavity corresponding to the area connected with the sand box; the long-axis sand core is kept fixed in the connecting sand box through the lost foam positioning piece, so that the composite sand box and the connecting sand box are combined, and the position is ensured to be accurate; the positioning mechanism adopts a random positioning device, is particularly suitable for a structure with a small sand core and a slender core head, can well solve the problem of core deviation and avoids causing the damage of the sand core or the sand box.
Description
Technical Field
The utility model relates to fixing of a casting sand core, in particular to a long shaft sand core positioning mechanism, and belongs to the technical field of casting.
Background
In order to cast a product of a desired shape during the casting process, it is usually necessary to assist with a corresponding sand core; positioning of long axis cores after being lowered into the flask is very difficult for special elongated structures of the cores.
Under the normal condition, one end of the long-axis sand core is fixed on one side of the sand box, and the long-axis sand core has the core deviation problem in the sand box due to the overlong length of the long-axis sand core; therefore, when the sand box on the other side is closed, the core head on the other end of the long shaft sand core and the sand box on the other side cannot be aligned in position, so that the sand core or the sand box is damaged, and the box cannot be closed.
Disclosure of Invention
In view of the problem of difficult positioning of the long-axis sand core, the utility model aims to provide a long-axis sand core positioning mechanism which adopts a random positioning device, can well solve the problem of core deviation and avoid causing damage to the sand core or a sand box.
In order to achieve the purpose, the utility model adopts the technical scheme that: a long axis sand core positioning mechanism comprising: connecting the sand box, the long shaft sand core, the lost foam positioning piece and the compound sand box; the compound sand box is connected with the connecting sand box in a matching way, cavities are arranged in the connecting sand box and the compound sand box, and the connecting sand box is matched with the compound sand box to form a cavity for accommodating the whole long-axis sand core; one end core head of the long shaft sand core is fixedly connected into the cavity of the connecting sand box, and a lost foam positioning piece is arranged on the outer side of the middle part of the long shaft sand core and in the cavity corresponding to the area of the connecting sand box; the long-axis sand core is kept fixed in the connecting sand box through the lost foam positioning piece, so that the composite sand box and the connecting sand box are combined, and the position is ensured to be accurate;
further, the section of the long-axis sand core is circular;
furthermore, the diameter of the cavity for connecting the sand box and the diameter of the cavity for connecting the sand box are both larger than the outer diameter of the long-axis sand core;
furthermore, the fixing mode of a core head at one end of the long-axis sand core and the connecting sand box is bolt tightening or other fixing modes;
furthermore, the lost foam positioning piece is arranged between the outer diameter of the long-shaft sand core and the inner wall of the connecting sand box;
furthermore, the lost foam positioning piece is designed along with the mould, and the inner wall and the outer wall of the lost foam positioning piece are respectively changed along with the change of the outer diameter of the long-axis sand core and the inner wall of the connecting sand box;
specifically, the lost foam positioning piece is of a circular ring structure, the inner diameter of the circular ring is tightly attached to the outer diameter of the long-axis sand core, the outer diameter of the circular ring is tightly attached to the inner wall of the connecting sand box, and the lost foam is positioned between the outer diameter of the long-axis sand core and the inner wall of the connecting sand box in an interference fit mode;
specifically, the lost foam positioning piece is made of foam; after the box is closed, the lost foam positioning piece does not need to be taken out, and the lost foam positioning piece can be burnt out during pouring.
Furthermore, the long-axis sand core is positioned in the connecting sand box to form secondary positioning, so that core deviation is effectively prevented;
the secondary positioning comprises the following steps: the long shaft sand core and the core head fixedly connected with the sand box form first positioning and second positioning at the position of a lost foam positioning piece arranged between the outer side of the middle position of the long shaft sand core and the inner wall of the connecting sand box.
The technical scheme of the utility model has the following beneficial effects: the positioning mechanism adopts a random positioning device, is particularly suitable for a slender structure of a sand core with a small core head, can well solve the problem of core deviation and avoid causing damage to the sand core or a sand box; the adopted random positioning device adopts a lost foam positioning piece made of foam, and the lost foam positioning piece does not need to be taken out when in use and is burnt when in pouring; convenient to use provides convenient condition for whole product casting process, improves casting efficiency.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure, 1, a connecting sand box, 2, a long-axis sand core, 3, a lost foam positioning piece, 2.1, a long-axis sand core upper core print, 2.2 and a long-axis sand core lower core print.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto.
The long-axis sand core positioning mechanism shown in fig. 1 comprises: connecting a sand box 1, a long shaft sand core 2, a lost foam positioning piece 3 and a compound sand box;
in this embodiment, the connecting flask 1 is defined as a cope flask, and the composite sand mold is defined as a drag flask; in other embodiments, the connecting flask is not necessarily a cope flask;
the lower sand box is connected with the upper sand box in a matching way, cavities are arranged in the upper sand box and the lower sand box, and the upper sand box and the lower sand box are matched to form a cavity for containing the whole long-axis sand core; one end core head of the long shaft sand core 2, namely, an upper core head 2.1 is fixedly connected in a cavity of the cope flask, and a lost foam positioning piece 3 is arranged outside the middle part of the long shaft sand core 2 and in a cavity corresponding to the area of the cope flask; the long-axis sand core 2 is kept and fixed in the cope flask through the lost foam positioning piece 3, so that the drag flask and the cope flask are combined, and the position is ensured to be accurate;
the section of the long-axis sand core 2 is circular;
the diameter of the cavity of the upper sand box and the diameter of the cavity of the lower sand box are both larger than the outer diameter of the long-axis sand core 2;
an upper core head 2.1 of the long-axis sand core 2 is hung in the upper sand box and is screwed and fixed in a bolt mode, and a lower core head of the long-axis sand core 2 is a free end and extends out of the upper sand box;
in the embodiment, the length of the long-axis sand core 2 is 580mm, the diameter of the sand core is 60mm, and the diameter of the sand core close to the lower core print 2.2 is 40 mm.
The lost foam positioning piece 3 is arranged between the outer diameter of the long-axis sand core 2 and the inner wall of the cope flask;
the lost foam positioning piece 3 is designed according to the mould, and the inner wall and the outer wall of the lost foam positioning piece 3 are respectively changed along with the change of the outer diameter of the long-axis sand core 2 and the inner wall of the cope box;
in the embodiment, the lost foam positioning piece 3 is of a circular ring structure, the inner diameter of the circular ring is tightly attached to the outer diameter of the long-axis sand core 2, the outer diameter of the circular ring is tightly attached to the inner wall of the cope box, and the lost foam is positioned between the outer diameter of the long-axis sand core 2 and the inner wall of the cope box in an interference fit mode;
specifically, the lost foam positioning piece 3 is made of foam; after the box is closed, the lost foam positioning piece 3 does not need to be taken out, and the lost foam positioning piece can be burnt out during pouring.
The long-axis sand core 2 is positioned in the cope box to form secondary positioning, so that core deviation is effectively prevented;
the secondary positioning comprises the following steps: the first positioning is formed at the upper core head 2.1 fixedly connected with the cope flask by the long-axis sand core 2, and the second positioning is formed at the position of the lost foam positioning piece 3 arranged between the outer side of the middle position of the long-axis sand core 2 and the inner wall of the cope flask.
The positioning mode of the lost foam positioning piece 3 is particularly suitable for a sand core structure with a small core head and a fine sand core.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, and the scope of protection is still within the scope of the utility model.
Claims (9)
1. A long shaft sand core positioning mechanism is characterized by comprising: connecting the sand box, the long shaft sand core, the lost foam positioning piece and the compound sand box; the compound sand box is connected with the connecting sand box in a matching way, cavities are arranged in the connecting sand box and the compound sand box, and the connecting sand box is matched with the compound sand box to form a cavity for accommodating the whole long-axis sand core; one end core head of the long shaft sand core is fixedly connected in the cavity of the connecting sand box, and a lost foam positioning piece is arranged on the outer side of the middle of the long shaft sand core and in the cavity corresponding to the area of the connecting sand box.
2. The long axis sand core positioning mechanism of claim 1, wherein: the section of the long-axis sand core is circular.
3. The long axis sand core positioning mechanism of claim 1, wherein: the diameter of the cavity for connecting the sand box and the diameter of the cavity for connecting the sand box are both larger than the outer diameter of the long-axis sand core.
4. The long axis sand core positioning mechanism of claim 1, wherein: and a core head at one end of the long-axis sand core is fixed with the connecting sand box by a bolt tightening mode.
5. The positioning mechanism for long axis sand cores of any one of claims 1 to 4, wherein: the lost foam positioning piece is designed according to the shape.
6. The long axis sand core positioning mechanism of claim 5, wherein: the lost foam positioning piece is of a circular ring structure, the inner diameter of the circular ring is tightly attached to the outer diameter of the long-axis sand core, and the outer diameter of the circular ring is tightly attached to the inner wall of the connecting sand box.
7. The long axis sand core positioning mechanism of claim 6, wherein: the lost foam positioning piece is made of foam.
8. The long axis sand core positioning mechanism of claim 1, wherein: the long shaft sand core is positioned in the connecting sand box to form secondary positioning.
9. The long axis sand core positioning mechanism of claim 8, wherein: the secondary positioning comprises the following steps: the long shaft sand core and the core head fixedly connected with the sand box form first positioning and second positioning at the position of a lost foam positioning piece arranged between the outer side of the middle position of the long shaft sand core and the inner wall of the connecting sand box.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202122915288.3U CN216607137U (en) | 2021-11-25 | 2021-11-25 | Long shaft sand core positioning mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202122915288.3U CN216607137U (en) | 2021-11-25 | 2021-11-25 | Long shaft sand core positioning mechanism |
Publications (1)
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CN216607137U true CN216607137U (en) | 2022-05-27 |
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CN202122915288.3U Active CN216607137U (en) | 2021-11-25 | 2021-11-25 | Long shaft sand core positioning mechanism |
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2021
- 2021-11-25 CN CN202122915288.3U patent/CN216607137U/en active Active
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