CN217901331U - Tensile sample sand mold structure for low pressure casting - Google Patents
Tensile sample sand mold structure for low pressure casting Download PDFInfo
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- CN217901331U CN217901331U CN202221513163.6U CN202221513163U CN217901331U CN 217901331 U CN217901331 U CN 217901331U CN 202221513163 U CN202221513163 U CN 202221513163U CN 217901331 U CN217901331 U CN 217901331U
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- pressure casting
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Abstract
The utility model relates to a casting technical field discloses a tensile sample sand mould structure for low pressure casting, including the sand mould body, be equipped with the cross gate on the sand mould body, with sprue, the test bar die cavity of cross gate intercommunication, the cross gate is along the direction of being close to the sprue to shrink gradually, the test bar die cavity passes through the ingate intercommunication with the sprue, the ingate is along shrinking gradually to the direction of test bar die cavity from the sprue. The utility model has simple structure and convenient operation and use; the test bar can be sequentially solidified from top to bottom by matching with low-pressure pouring, so that the defects of shrinkage porosity and the like in gravity pouring are avoided, and the test bar and the casting can be simultaneously poured, so that the objective and accuracy of casting detection is guaranteed.
Description
Technical Field
The utility model relates to a casting technical field especially relates to a tensile sample sand mould structure is used in low pressure casting.
Background
Aluminum alloy and magnesium alloy castings need to be provided with test bars in the production process so as to test the tensile property of the aluminum alloy and magnesium alloy castings. At present, most of test bars provided by casting enterprises are formed by gravity casting and single casting, but the gravity casting test bars often have the defects of shrinkage porosity, slag inclusion and the like, so that the tensile property is unqualified, and therefore, the re-sampling detection is needed, and the mechanical property of a casting body cannot be objectively inspected due to the large difference of the forming conditions of the single casting test bars and the casting, so that the improvement is needed.
SUMMERY OF THE UTILITY MODEL
To the technical problem that prior art exists, the utility model provides a low pressure casting is with tensile sample sand mould structure.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a tensile sample sand mould structure for low pressure casting, includes the sand mould body, be equipped with the runner on the sand mould body, with sprue, the test bar die cavity of runner intercommunication, the runner shrinks gradually along the direction that is close to the sprue, the test bar die cavity passes through the ingate intercommunication with the sprue, the ingate shrinks gradually along the direction from the sprue to the test bar die cavity.
Preferably, the vertical section of the horizontal runner is an isosceles trapezoid with an apex angle of 92-100 degrees. The arrangement can ensure that the pouring alloy liquid in the transverse pouring gate is solidified from top to bottom in sequence under the condition of low pressure after pouring, and overcomes the defects of gravity pouring in the prior art.
Preferably, the contraction end of the runner is connected with the sprue, and the distance between the contraction end side edge of the runner and the side edge of the sprue is 5-10 mm. The arrangement can fully play the feeding role of the transverse pouring channel on the test bar, so that the test bar is solidified and molded before the transverse pouring channel.
Preferably, the horizontal section of the inner gate is an isosceles trapezoid with an apex angle of 92 to 100 °.
Preferably, the top of the test bar cavity is a chuck cavity matched with a test bar chuck on a test bar, the diameter of the test bar chuck is D, the inner gate is communicated with the chuck cavity, the opening width of the contraction end of the inner gate is D/2, the distance between the edges of two sides of the contraction end of the inner gate and the edge of the side part of the test bar cavity on the same side of the contraction end of the inner gate is D/4, and the distance between the upper edge of the contraction end of the inner gate and the upper edge of the test bar cavity and the distance between the lower edge of the contraction end of the inner gate and the lower edge of the test bar cavity are 3-5 mm.
The arrangement can ensure that the poured alloy liquid can stably enter the test bar cavity from the inner pouring gate, can balance the temperature of the alloy liquid at the top of the test bar cavity, and avoids the cold shut defect.
Preferably, the sand mould body includes the sand mould components of a whole that can function independently that two concatenations set up, is equipped with the concatenation core on one of them sand mould components of a whole that can function independently, corresponds on another sand mould components of a whole that can function independently that the concatenation core is equipped with the concatenation recess.
Preferably, the splicing core print comprises two splicing surfaces with an included angle of 100-135 degrees. The arrangement can play a better positioning role and ensure the reliability of split connection of the two sand molds in the pouring process.
The utility model discloses still including making other subassemblies of a low pressure casting with tensile sample sand mould structure normal use, be the conventional technical means in this field. In addition, the device or the component which is not limited in the utility model adopts the conventional technical means in the field.
The utility model has simple structure and convenient operation and use; the test bar can be sequentially solidified from top to bottom by matching with low-pressure pouring, so that the defects of shrinkage porosity and the like in gravity pouring are avoided, and the test bar and the casting can be simultaneously poured, so that the objective and accuracy of casting detection is guaranteed.
Drawings
Fig. 1 is a schematic view of the explosion structure of the present embodiment.
Fig. 2 is a longitudinal sectional view of the present embodiment.
FIG. 3 is a schematic view of the structure of the runner of FIG. 2.
Fig. 4 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 2.
Fig. 5 is a schematic view showing the structure of a test bar cast by the sand mold structure of the present embodiment.
FIG. 6 is a schematic structural diagram of a first working method of the present embodiment
Fig. 7 is a schematic structural diagram of a second operation mode of the present embodiment.
In the figure: 1. a cross gate; 2. a sprue; 3. a test bar cavity; 4. an inner gate; 5. a chuck cavity; 6. the sand mold is split; 7. splicing the core print; 8. splicing the grooves; 9. splicing the surfaces; 10. a low-pressure runner; 11. molding a casting by sand; 12. transversely pouring a trough; 13. a direct casting trough; 14. pouring a groove in; 15. a test bar type groove.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
Referring to fig. 1-5, the tensile sample sand mold structure for low-pressure casting comprises a sand mold body, wherein a cross gate 1, a sprue 2 communicated with the cross gate 1 and a test bar cavity 3 are arranged on the sand mold body, the cross gate 1 gradually shrinks along the direction close to the sprue 2, the test bar cavity 3 is communicated with the sprue 2 through an inner gate 4, and the inner gate 4 gradually shrinks along the direction from the sprue to the test bar cavity 3.
In the embodiment, the horizontal pouring gate 1 is horizontally arranged, the straight pouring gate 2 is vertically arranged, and the horizontal section of the straight pouring gate 2 can be rectangular, square or circular; the left side and the right side of the sprue 2 are respectively provided with a test bar cavity 3, so that the casting of two test bars can be simultaneously completed by one sand mold body.
The vertical section of the horizontal pouring gate 1 is an isosceles trapezoid with the vertex angle of 92-100 degrees. In the embodiment, the front side surface and the rear side surface of the horizontal pouring gate are inclined (the included angle between the front side surface and the rear side surface of the horizontal pouring gate is 2-10 degrees) and are symmetrically arranged to form the waist with the isosceles trapezoid cross section, and the arrangement can ensure that the pouring alloy liquid in the horizontal pouring gate 1 is solidified from top to bottom in sequence under the low-pressure condition after pouring, so that the defects and defects of gravity pouring in the prior art are overcome.
The contraction end of the horizontal pouring gate 1 is connected with the straight pouring gate 2, and the distance between the edge of the side part of the contraction end of the horizontal pouring gate 1 and the edge of the side part of the straight pouring gate 2 is 5-10 mm. The arrangement can fully play the feeding role of the horizontal pouring channel 1 to the test bar, so that the test bar is solidified and molded before the horizontal pouring channel 1.
The horizontal section of the inner gate 4 is an isosceles trapezoid with an apex angle of 92-100 degrees. In this embodiment, the front and rear side surfaces of the inner gate are symmetrical with respect to the center of the test bar cavity, and gradually approach each other in the direction from the sprue to the test bar cavity to form contraction, and the included angles between the front and rear side surfaces and the symmetrical plane are both 2 to 10 °.
The top of the test bar cavity 3 is a chuck cavity 5 matched with a test bar chuck on a test bar, the diameter of the test bar chuck is D, the inner gate 4 is communicated with the chuck cavity 5, the opening width of the contraction end of the inner gate 4 is D/2, the distance between the edges of the two sides of the contraction end of the inner gate 4 and the edge of the side part of the test bar cavity 3 on the same side of the contraction end of the inner gate 4 is D/4, the distance between the upper edge of the contraction end of the inner gate 4 and the upper edge of the test bar cavity 3 and the distance between the lower edge of the contraction end of the inner gate 4 and the lower edge of the test bar cavity 3 are 3-5 mm.
The arrangement can ensure that the poured alloy liquid can stably enter the test bar cavity 3 from the inner pouring gate 4, balance the temperature of the alloy liquid at the top of the test bar cavity 3 and avoid the cold shut defect.
The sand mould body includes sand mould components of a whole that can function independently 6 that two concatenations set up, is equipped with concatenation core 7 on one of them sand mould components of a whole that can function independently 6, corresponds concatenation core 7 on another sand mould components of a whole that can function independently 6 and is equipped with concatenation recess 8.
In the embodiment, the two sand mold split bodies 6 are relatively provided with a transverse pouring groove 12, a straight pouring groove 13, an inner pouring groove 14 and a test bar type groove 15, the sand mold body is formed by splicing the two sand mold split bodies 6, after splicing, the transverse pouring grooves on the two sand mold split bodies 6 are communicated to form a transverse pouring channel 1, the straight pouring grooves are communicated to form a straight pouring channel 2, the inner pouring grooves are communicated to form an inner pouring gate 4, and the test bar type groove is communicated to form a test bar cavity 3; the three splicing core heads 7 and the three splicing grooves 8 are respectively positioned at the left side part, the right side part and the top part of the sand mold split body 6.
The splicing core print 7 comprises two splicing surfaces 9 with an included angle of 100-135 degrees. The arrangement can play a better positioning role and ensure the reliability of the connection of the two sand mold split bodies 6 in the pouring process.
Referring to fig. 6, the first working mode of the present invention is:
(1) Smearing a binder on the splicing core head, and splicing and fixing the two sand moulds into a sand mould body in a split manner;
(2) Arranging a plurality of sand mold bodies on the low-pressure pouring gate 10 in sequence according to requirements;
(3) And filling sand around the sand mold body, and then pouring at low pressure to obtain the low-pressure poured test bar.
Referring to fig. 7, the second working mode of the present invention is:
(1) Smearing the binder on the splicing core print 7, and splicing and fixing the two sand mold split bodies 6 into a sand mold body;
(2) Arranging a plurality of sand mould bodies on a low-pressure pouring gate 10 around a casting sand mould 11 in sequence;
(3) And filling sand around the sand mold body, and then pouring at low pressure to obtain the test bar poured with the casting at the same time.
The utility model has simple structure and convenient operation and use; the test bar can be sequentially solidified from top to bottom by matching with low-pressure pouring, so that the defects of shrinkage porosity and the like in gravity pouring are avoided, and the test bar and the casting can be simultaneously poured, so that the objective and accuracy of casting detection is guaranteed.
While embodiments of the invention have been described above, the above description is illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the illustrated embodiments.
Claims (7)
1. The utility model provides a low pressure casting is with tensile sample sand mould structure, includes the sand mould body, its characterized in that: the testing mould is characterized in that a cross gate, a sprue communicated with the cross gate and a test bar cavity are arranged on the sand mould body, the cross gate gradually shrinks along the direction close to the sprue, the test bar cavity is communicated with the sprue through an inner gate, and the inner gate gradually shrinks along the direction from the sprue to the test bar cavity.
2. The tension sample sand mold structure for low pressure casting according to claim 1, characterized in that: the vertical section of the horizontal pouring gate is an isosceles trapezoid with the vertex angle of 92-100 degrees.
3. The tension sample sand mold structure for low pressure casting according to claim 2, characterized in that: the contraction end of the horizontal pouring channel is connected with the straight pouring channel, and the distance between the side edge of the contraction end of the horizontal pouring channel and the side edge of the straight pouring channel is 5-10 mm.
4. The tension sample sand mold structure for low pressure casting according to claim 1, characterized in that: the horizontal section of the inner sprue is an isosceles trapezoid with the vertex angle of 92-100 degrees.
5. The tension sample sand mold structure for low pressure casting according to claim 4, wherein: the top of the test bar cavity is a chuck cavity matched with a test bar chuck on a test bar, the diameter of the test bar chuck is D, the inner gate is communicated with the chuck cavity, the opening width of the contraction end of the inner gate is D/2, the distance between the edges of the two sides of the contraction end of the inner gate and the edge of the side part of the test bar cavity on the same side of the contraction end of the inner gate is D/4, and the distance between the upper edge of the contraction end of the inner gate and the upper edge of the test bar cavity and the distance between the lower edge of the contraction end of the inner gate and the lower edge of the test bar cavity are 3-5 mm.
6. The tension sample sand mold structure for low pressure casting according to claim 1, characterized in that: the sand mould body includes the sand mould components of a whole that can function independently that two concatenations set up, is equipped with the concatenation core on one of them sand mould components of a whole that can function independently, corresponds on another sand mould components of a whole that can function independently that the concatenation core is equipped with the concatenation recess.
7. The tension sample sand mold structure for low pressure casting according to claim 6, wherein: the splicing core head comprises two splicing surfaces with an included angle of 100-135 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221513163.6U CN217901331U (en) | 2022-06-17 | 2022-06-17 | Tensile sample sand mold structure for low pressure casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221513163.6U CN217901331U (en) | 2022-06-17 | 2022-06-17 | Tensile sample sand mold structure for low pressure casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217901331U true CN217901331U (en) | 2022-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221513163.6U Active CN217901331U (en) | 2022-06-17 | 2022-06-17 | Tensile sample sand mold structure for low pressure casting |
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| CN (1) | CN217901331U (en) |
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- 2022-06-17 CN CN202221513163.6U patent/CN217901331U/en active Active
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