CN219746244U - Precoated sand hot core box die - Google Patents
Precoated sand hot core box die Download PDFInfo
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- CN219746244U CN219746244U CN202320981296.4U CN202320981296U CN219746244U CN 219746244 U CN219746244 U CN 219746244U CN 202320981296 U CN202320981296 U CN 202320981296U CN 219746244 U CN219746244 U CN 219746244U
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- heating
- module
- die
- hole
- precoated sand
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- 239000004576 sand Substances 0.000 title claims abstract description 54
- 238000010438 heat treatment Methods 0.000 claims abstract description 167
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 abstract description 5
- 238000000465 moulding Methods 0.000 abstract description 5
- 238000004939 coking Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Casting Devices For Molds (AREA)
Abstract
The utility model relates to a precoated sand hot core box die, and belongs to the technical field of casting dies. In order to solve the casting problems that the heating pipe of the existing hot core box die is unreasonable in design, the die is heated unevenly, insufficient curing or excessive curing and coking of the core are easy to cause. The utility model comprises a first module and a second module; after the first module and the second module are matched, a cavity matched with the shape of the core is formed between the first module and the second module; the precoated sand hot core box die is provided with a sand injection port; the precoated sand hot core box die is provided with a plurality of heating holes, and heating pieces are respectively arranged in the heating holes; the heating holes are divided into parallel heating holes and included angle heating holes according to the opening mode; the parallel heating holes are formed in such a way that the opening direction is parallel to the die-combining surface of the precoated sand hot core box die; the included angle heating hole is arranged in an included angle between the opening direction and the die clamping surface of the precoated sand hot core box die. The heating pipe provided by the utility model has the advantages that the design is reasonable, the temperature around the core is relatively consistent and stable, the precoated sand can be fully solidified, and the molding quality of the core is good.
Description
Technical Field
The utility model relates to a precoated sand hot core box die, and belongs to the technical field of casting dies.
Background
The hot core box core making process includes injecting sand material compounded with casting sand, thermosetting resin and curing agent into core box with heater to heat the core box to 180-250 deg.c, and setting the sand material to harden in short time to form core without stoving in a stoving furnace. Moreover, as long as the surface layer of the sand core is hardened by 5-10 mm, the sand core can be taken out from the core box, and the core sand in the central part can harden the residual sand by itself under the action of the residual heat and the heat released by the hardening reaction, thereby providing a very effective method for rapidly producing the medium-small sand core with high dimensional accuracy (the maximum wall thickness of the sand core is generally 50-75 mm).
The curing of the precoated sand core depends on the heating of a mold, the heating mode of the mold adopts an electric heating pipe for heating, the arrangement mode of the heating pipe is parallel to the parting surface of the mold in the conventional mold design, the mold designed in the way has simple structure, but the problem that the whole mold is heated unevenly and the partial position of the core is cured insufficiently is also existed; or the heating temperature of the mold is increased to ensure that all positions of the core are solidified, which causes problems of excessive solidification and coking of local positions of the core. Therefore, a precoated sand hot core box die is needed to solve the casting problems that the existing hot core box die is unreasonable in heating pipe design, uneven in die heating, insufficient in core curing or excessive in curing and coking are easy to cause.
Disclosure of Invention
The utility model provides a precoated sand hot core box die, which is characterized in that the arrangement of heating pipes is optimized, namely the arrangement of the heating pipes is parallel to a die clamping surface, and the heating pipes are also arranged at the position vertical to the die clamping surface, so that the temperature around a die core is relatively consistent and stable, the die core can be fully solidified without coking, and the die core forming quality is improved.
In order to achieve the above purpose, the present utility model provides the following technical solutions: a precoated sand hot core box mold comprises a first module and a second module; after the first module and the second module are matched, a cavity matched with the shape of the core is formed between the first module and the second module; the precoated sand hot core box die is provided with a sand injection port; the precoated sand hot core box die is provided with a plurality of heating holes, and heating pieces are respectively arranged in the heating holes; the heating holes are divided into parallel heating holes and included angle heating holes according to the opening mode; the parallel heating holes are formed in such a way that the opening direction is parallel to the die-combining surface of the precoated sand hot core box die; the included angle heating hole is arranged in an included angle between the opening direction and the die clamping surface of the precoated sand hot core box die.
Specifically, the precoated sand hot core box die is of an upper die closing structure and a lower die closing structure; the first module is positioned on the upper side, and the second module is positioned on the lower side; the first module and the second module are respectively provided with a sub-cavity, and after the first module and the second module are assembled, the sub-cavities of the first module and the second module form a cavity with the shape matched with the shape of the core.
Specifically, the parallel heating holes are through holes which extend from the side surface of the die along the direction parallel to the die-bonding surface and penetrate through the die; and the included angle heating hole is a blind hole which faces the direction of the die clamping surface from one side of the die and is perpendicular to the die clamping surface. The heating element is installed in the through parallel heating holes and is used as a main heating source of the mold, and in order to improve the heating of the mold close to the mold core fully, a blind hole which is arranged from one side of the mold to the direction of the mold clamping surface and is perpendicular to the mold clamping surface is arranged, and the heating element is arranged in the blind hole and is used as an auxiliary heating source of the mold, so that the mold, particularly the part around the mold core, is fully heated, and the molding quality of the mold core is improved.
Specifically, the parallel heating holes comprise parallel heating holes of the first module and parallel heating holes of the second module; the included angle heating hole comprises an included angle heating hole of the first module and an included angle heating hole of the second module; the side surface of the first module is provided with a mounting hole parallel to the die-combining surface at the position close to the sub-cavity, so as to form a parallel heating hole of the first module; the side surface of the second module is provided with a mounting hole parallel to the die-combining surface at the position close to the sub-cavity, so as to form a parallel heating hole of the second module; the back of the first module is provided with a vertical mounting hole towards the direction of the sub-type cavity at the position of the sub-type cavity to form an included angle heating hole of the first module; the back of the second module is provided with a vertical mounting hole towards the direction of the sub-type cavity at the position of the sub-type cavity to form an included angle heating hole of the second module.
Specifically, the heating element comprises a heating tube.
Specifically, the length of the heating pipe in the parallel heating hole is greater than that of the parallel heating hole, and two ends of the heating pipe in the parallel heating hole extend out from two ends of the parallel heating hole respectively and are fixedly connected with the precoated sand hot core box die through the fixing piece. The setting is run through parallel heating hole with the heating pipe and is carried out main part heating to the mould like this, fixes the heating pipe through setting up the mounting to in the realization heating engineering, avoid the removal of heating pipe, guarantee the heating effect.
Specifically, one end of the heating pipe in the included angle heating hole is arranged in the included angle heating hole, and the other end of the heating pipe extends out of the hole as a wire harness end.
Specifically, the opening end of the blind hole is fixedly provided with a pressing plate, and the middle part of the pressing plate is provided with a mounting through hole for mounting the wire harness end of the heating pipe.
Specifically, the aperture of the mounting through hole is smaller than the aperture of the included angle heating hole. Because the wire harness end diameter of the heating pipe is smaller than the diameter of the heating pipe, the heat loss of the heating pipe from the mounting through hole is reduced in order to ensure the heat transfer of the heating pipe to the die. The aperture setting of the installation through hole is smaller than the aperture of the included angle heating hole, so that the installation and the laying of the wire harness end which can be used for a heating pipe can be realized, heat loss can be avoided, and heating efficiency is improved.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model sets up the heating hole parallel to the die parting surface of the die, i.e. the parting surface of the core and set up with the parting surface of the die parting surface, and set up the heating pipe in the heating hole. Therefore, when the mold is heated, the temperature around the mold core can be relatively consistent and stable, so that the mold core can be fully solidified in the molding process, the phenomenon that the solidification is coked or insufficient due to the fact that the temperature is too high or too low at a local position can be avoided, and the molding quality of the mold core is improved.
On the basis of the above, the included angle heating hole is perpendicular to the die-combining surface, and the die is simple to process and low in production cost.
Drawings
Fig. 1 is a schematic structural diagram of a precoated sand hot box mold of the present embodiment;
fig. 2 is a top view of the structure of the precoated sand hot box mold of the present embodiment;
FIG. 3 is a cross-sectional view at A-A of FIG. 2 (heating tube and platen not shown);
fig. 4 is a cross-sectional view 2 at A-A in fig. 2 (the heating tube in the angled heating hole is not shown).
In the figure: 1. a first module; 2. a second module; 3. parallel heating holes; 4. an included angle heating hole; 5. a clamp; 6. and (5) pressing plates.
Detailed Description
The utility model will be further elucidated with reference to the drawings in the embodiments of the utility model.
Referring to fig. 1-4, the embodiment discloses a precoated sand hot core box mold, which comprises a first module 1 and a second module 2; after the first module 1 and the second module 2 are assembled, a cavity matched with the shape of the core is formed between the first module and the second module; the precoated sand hot core box die is provided with a sand injection port; the precoated sand hot core box die is provided with a plurality of heating holes, and heating pieces are respectively arranged in the heating holes; the heating holes are divided into parallel heating holes 3 and included angle heating holes 4 according to the opening mode; the parallel heating holes are formed in such a way that the opening direction is parallel to the die-combining surface of the precoated sand hot core box die; the included angle heating hole is arranged in an included angle between the opening direction and the die clamping surface of the precoated sand hot core box die.
Further, the precoated sand hot core box die is of an upper die closing structure and a lower die closing structure; located on the upper side is a first module 1 and on the lower side is a second module 2; the first module 1 and the second module 2 are respectively provided with a sub-cavity, and after the first module 1 and the second module 2 are assembled, the sub-cavities of the first module 1 and the second module 2 form a cavity which is matched with the shape of the mold core.
Further, the parallel heating holes 3 are through holes which extend from the side surface of the die along the direction parallel to the die-bonding surface and penetrate through the die; and the included angle heating hole 4 is a blind hole which faces the die clamping surface direction from one side of the die and is perpendicular to the die clamping surface.
Further, the parallel heating holes 3 include parallel heating holes of the first module and parallel heating holes of the second module; the included angle heating hole 4 comprises an included angle heating hole of the first module and an included angle heating hole of the second module; the side surface of the first module is provided with a mounting hole parallel to the die-combining surface at the position close to the sub-cavity, so as to form a parallel heating hole of the first module; the side surface of the second module is provided with a mounting hole parallel to the die-combining surface at the position close to the sub-cavity, so as to form a parallel heating hole of the second module; the back of the first module is provided with a vertical mounting hole towards the direction of the sub-type cavity at the position of the sub-type cavity to form an included angle heating hole of the first module; the back of the second module is provided with a vertical mounting hole towards the direction of the sub-type cavity at the position of the sub-type cavity to form an included angle heating hole of the second module.
Further, the heating element comprises a heating tube.
Further, the length of the heating pipe in the parallel heating hole 3 is larger than that of the parallel heating hole, and two ends of the heating pipe in the parallel heating hole extend out from two ends of the parallel heating hole respectively and are fixedly connected with the precoated sand hot core box die by arranging the clamp 5 as a fixing piece.
Further, one end of the heating pipe in the included angle heating hole 4 is arranged in the included angle heating hole, and the other end of the heating pipe is used as a wire harness end to extend out of the hole.
Further, the opening end of the blind hole is fixedly provided with a pressing plate 6, and the middle part of the pressing plate 6 is provided with a mounting through hole for mounting the wire harness end of the heating pipe.
Further, the aperture of the mounting through hole is smaller than the aperture of the included angle heating hole.
Working principle: 1. before the precoated sand hot box die of the embodiment is used, through holes are formed in the side face of the die along the direction parallel to the die closing face of the die according to the structure of the die cavity and the position distribution of the die so as to form parallel heating holes. And opening holes in the position of the die cavity on the back of the die along the direction perpendicular to the die clamping surface so as to form an included angle heating hole, wherein the attention is not required to penetrate through the die cavity in the opening process. After the heating hole is opened, the heating pipe installation process is performed. The length of the heating pipe in the parallel heating hole is 40mm larger than the length of the die, and two ends of the heating pipe penetrate out of the parallel heating hole respectively and are fixed by adopting the clamping hoop, so that the heating pipe is prevented from moving. And placing a heating pipe in the included angle heating hole, installing a pressing plate at the opening end of the included angle heating hole, and fixing the pressing plate on the die by using a fixing bolt, wherein the wire harness end of the heating pipe penetrates out of the installation through hole of the pressing plate.
2. When the mold is used, after the first module and the second module of the mold are assembled and fixed, a heating pipe is used for heating, sand injection, cooling and solidification are carried out after the heating process is completed, and finally, the mold is opened to take out the mold core, so that the precoated sand molding work is completed.
While the embodiments of the present utility model have been described in detail with reference to the examples, the present utility model is not limited to the above embodiments, and it will be apparent to those skilled in the art that various equivalent changes and substitutions can be made therein without departing from the principles of the present utility model, and such equivalent changes and substitutions should also be considered to be within the scope of the present utility model.
Claims (9)
1. A precoated sand hot core box mold comprises a first module and a second module; after the first module and the second module are matched, a cavity matched with the shape of the core is formed between the first module and the second module; the precoated sand hot core box die is provided with a sand injection port; the method is characterized in that: the precoated sand hot core box die is provided with a plurality of heating holes, and heating pieces are respectively arranged in the heating holes; the heating holes are divided into parallel heating holes and included angle heating holes according to the opening mode; the parallel heating holes are parallel to the die-combining surface of the precoated sand hot core box die in the direction of opening; the included angle heating holes are arranged in an included angle between the opening direction and the die clamping surface of the precoated sand hot core box die.
2. The precoated sand hot box mold of claim 1, wherein: the precoated sand hot core box die is of an upper die closing structure and a lower die closing structure; the first module is positioned on the upper side, and the second module is positioned on the lower side; the first module and the second module are respectively provided with a sub-cavity, and after the first module and the second module are assembled, the sub-cavities of the first module and the second module form a cavity matched with the shape of the mold core.
3. A precoated sand hot box mold according to claim 2, characterized in that: the parallel heating holes are through holes which extend from the side surface of the die along the direction parallel to the die-combining surface and penetrate through the die; and the included angle heating hole is a blind hole which faces the direction of the die clamping surface from one side of the die and is perpendicular to the die clamping surface.
4. A precoated sand hot box mold according to claim 3, characterized in that: the parallel heating holes comprise parallel heating holes of the first module and parallel heating holes of the second module; the included angle heating holes comprise included angle heating holes of the first module and included angle heating holes of the second module; the side surface of the first module is provided with a mounting hole parallel to the die-combining surface at the position close to the sub-cavity, so as to form a parallel heating hole of the first module; the side surface of the second module is provided with a mounting hole parallel to the die-combining surface at the position close to the sub-cavity, so as to form a parallel heating hole of the second module; the back of the first module is provided with a vertical mounting hole towards the direction of the sub-type cavity at the position of the sub-type cavity to form an included angle heating hole of the first module; the back of the second module is provided with a vertical mounting hole towards the direction of the sub-type cavity at the position of the sub-type cavity to form an included angle heating hole of the second module.
5. A precoated sand hot box mold according to claim 3, characterized in that: the heating element comprises a heating tube.
6. The precoated sand hot box mold of claim 5, wherein: the length of the heating pipe in the parallel heating hole is greater than that of the parallel heating hole, and two ends of the heating pipe in the parallel heating hole extend out of two ends of the parallel heating hole respectively and are fixedly connected with the precoated sand hot core box die through the fixing piece.
7. The precoated sand hot box mold of claim 5, wherein: one end of the heating pipe in the included angle heating hole is arranged in the included angle heating hole, and the other end of the heating pipe extends out of the hole as a wire harness end.
8. The precoated sand hot box mold of claim 7, wherein: the opening end of the blind hole is fixedly provided with a pressing plate, and the middle part of the pressing plate is provided with a mounting through hole for mounting the wire harness end of the heating pipe.
9. The precoated sand hot box mold of claim 8, wherein: the aperture of the mounting through hole is smaller than the aperture of the included angle heating hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320981296.4U CN219746244U (en) | 2023-04-26 | 2023-04-26 | Precoated sand hot core box die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320981296.4U CN219746244U (en) | 2023-04-26 | 2023-04-26 | Precoated sand hot core box die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219746244U true CN219746244U (en) | 2023-09-26 |
Family
ID=88083895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320981296.4U Active CN219746244U (en) | 2023-04-26 | 2023-04-26 | Precoated sand hot core box die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219746244U (en) |
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2023
- 2023-04-26 CN CN202320981296.4U patent/CN219746244U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231127 Address after: 213000 Block C, No. 258, Wuyi Road, economic development zone, Changzhou City, Jiangsu Province Patentee after: CRRC CHANGZHOU AUTO PARTS CO.,LTD. Patentee after: CHANGZHOU LANGRUI CASTING Co.,Ltd. Address before: 213025 Block C, No. 258, Wuyi Road, economic development zone, Changzhou City, Jiangsu Province Patentee before: CRRC CHANGZHOU AUTO PARTS CO.,LTD. |