CN118002761A - Method for 3D printing of built-in chill of sand mold - Google Patents
Method for 3D printing of built-in chill of sand mold Download PDFInfo
- Publication number
- CN118002761A CN118002761A CN202410064216.8A CN202410064216A CN118002761A CN 118002761 A CN118002761 A CN 118002761A CN 202410064216 A CN202410064216 A CN 202410064216A CN 118002761 A CN118002761 A CN 118002761A
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- China
- Prior art keywords
- sand
- chill
- cavity structure
- printing
- built
- Prior art date
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- Pending
Links
- 239000004576 sand Substances 0.000 title claims abstract description 139
- 238000010146 3D printing Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000007639 printing Methods 0.000 claims abstract description 13
- 239000000853 adhesive Substances 0.000 claims abstract description 10
- 230000001070 adhesive effect Effects 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 2
- 230000009970 fire resistant effect Effects 0.000 claims description 2
- 238000005266 casting Methods 0.000 abstract description 10
- 239000003973 paint Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000009825 accumulation Methods 0.000 abstract description 2
- 238000011081 inoculation Methods 0.000 abstract 1
- 230000004888 barrier function Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention relates to a method for 3D printing of a built-in chill of a sand mold, wherein a cavity structure for accommodating the chill is designed on the surface of the sand mold, a sand block is designed in the cavity structure, and a gap is arranged between the sand block and the inner wall of the cavity structure; a connecting body is arranged between the opening of the cavity structure and the sand block body, and the gap is closed; the sand mould, the cavity structure, the sand block and the connecting body are integrally printed and formed, and the sand mould, the sand block and the connecting body are paved with sand and sprayed with adhesive; the gaps are only sanded and no adhesive is sprayed. According to the manual control method for stream inoculation, after printing is finished, the cavity structure containing the chill is closed by the connecting body and the sand block, and paint cannot enter the cavity structure during application, so that the problem that the chill is difficult to put in due to paint accumulation is solved, and the casting efficiency and the casting quality are effectively improved; the bottom of the cavity structure is provided with the sand collecting groove, and residual scattered sand can be pushed into the sand collecting groove when the chill is placed, so that the scattered sand in the cavity structure is not required to be cleaned, and the production efficiency is effectively improved.
Description
Technical Field
The invention relates to the technical field of casting, in particular to a method for 3D printing of a built-in chill of a sand mold.
Background
The 3D printing casting breaks through the traditional casting form, is a leading technology in the casting industry, and is high in efficiency and sand mold quality compared with the traditional manual sand mold. The casting produced by adopting the 3D printing sand mould has finer appearance quality, and solves the production problems that the traditional process pattern cannot be started or the sand mould cannot be fixed due to the structural problem of the sand mould and the like in the technology aiming at the product with a complex structure.
In the casting process, a sand separation chill is usually arranged in a sand mold for controlling the cooling speed, and the chill is pre-buried to the design position of the chill in the molding process by traditional manual molding. The 3D printing sand mould is a layer-by-layer construction and integrated forming technology, the chill cannot be arranged in the sand mould printing process, and the sand-isolation chill is placed in a mode of reserving a cavity and a rear chill in the 3D printing sand mould in the prior art. In the production process, the reserved cavity is an open cavity, paint can enter the cavity during dip coating, paint is accumulated on the surface of the cavity, the size of a chill cavity is affected, and the chill cannot be placed in the cavity. And when the sand mould is printed in 3D, the cavity is filled with scattered sand, the scattered sand in the cavity needs to be removed one by one, and the problem that the chill is not placed in place due to unclean scattered sand removal often exists.
Disclosure of Invention
In view of the above, there is a need for a method for providing a 3D printing sand mold with a built-in chill.
In order to solve the problems, the invention adopts the following technical scheme:
The embodiment of the invention discloses a method for internally arranging chill in a 3D printing sand mould, which comprises the following steps:
Designing, namely designing a cavity structure for accommodating a chill on the surface of a sand mold, designing a sand block in the cavity structure, and arranging a gap between the sand block and the inner wall of the cavity structure; a connector is arranged between the opening of the cavity structure and the sand block body to seal the gap;
printing, namely printing by a 3D printer, sanding the sand mold, the sand block body and the connecting body, and spraying an adhesive; the gaps are only paved with sand without spraying adhesive;
Applying a fire resistant coating to the sand mold surface;
placing a chill, cutting off the connecting body, taking out the sand block body from the cavity structure, placing the chill into the cavity structure and filling up the chill by using resin sand.
In one embodiment, the thickness of the connector is 3mm to 5mm.
In one embodiment, the connector is disposed at 3 mm-5 mm of the inner end of the opening of the cavity structure.
In one embodiment, the gap is 1mm to 2mm.
In one embodiment, a sand collecting groove is designed at the bottom of the cavity structure, and a convex part matched with the sand collecting groove is designed on the sand block body; and in the step of placing the chill, the loose sand at the gap is pushed into the sand collecting groove.
In one embodiment, the sand collection groove is an annular groove.
In one embodiment, a chill information mark is arranged at the outer side end of the sand block body.
In one embodiment, after the step of placing the chill, the chill is placed into the cavity structure and filled with resin sand, the sand mold is allowed to stand for at least 10 minutes.
The technical scheme adopted by the invention can achieve the following beneficial effects:
according to the method for internally arranging the chill in the 3D printing sand mould, after printing is finished, the cavity structure containing the chill is closed through the connecting body and the sand block, and paint cannot enter the cavity structure during application, so that the problem that the chill is difficult to put in due to paint accumulation is solved, and the casting efficiency and the casting quality are effectively improved.
According to the method for internally arranging the chill in the 3D printing sand mould, disclosed by the invention, the bottom of the cavity structure is provided with the sand collecting groove, residual scattered sand can be pushed into the sand collecting groove while the chill is placed, the scattered sand in the cavity structure is not required to be cleaned, and the production efficiency is effectively improved.
The method for internally arranging the chill in the 3D printing sand mould disclosed by the invention has wide applicability and can be popularized and applied in a standardized and standardized way.
Drawings
FIG. 1 is a schematic structural view of a 3D printing sand mold before placement of a chill;
FIG. 2 is an enlarged view of part A of FIG. 1;
Fig. 3 is a schematic structural view of a 3D printing sand mold after placement of a chill;
reference numerals illustrate:
100-sand molds, 110-sand collecting grooves, 200-sand blocks, 210-convex parts, 220-connecting bodies and 300-gaps; 400-chill, 500-sand-separating layer.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", 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 apparatus or element to be referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, 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," "provided," "connected," and the like are to be construed broadly, and may be 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 the interior of two original elements together. 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.
The embodiment of the invention discloses a method for 3D printing of a built-in chill of a sand mold, which comprises the following steps:
In the design, the sand mold surface is designed to accommodate the cavity structure of the chill, as shown in fig. 1 and 2, the sand block 200 is designed in the cavity structure, the size of the sand block 200 may be the same as that of the chill 400, or the size of the sand block 200 may be slightly larger than that of the chill 400, and the height of the sand block 200 is smaller than the depth of the cavity structure, i.e. the sand block 200 is entirely placed in the cavity structure. A gap 300 is designed between the sand block 200 and the inner wall of the cavity structure, and the width of the gap 300 is preferably 1 mm-2 mm. A connector 220 is provided between the open end of the sand block 200 facing the cavity structure and the side wall of the cavity structure for closing the gap 300.
The thickness of the connection body 220 may be designed to be 3mm to 5mm. Preferably, the side of the connecting body 220 facing away from the gap 300 may be circumferentially designed with a relief groove having a depth smaller than the thickness of the connecting body 220.
Printing, namely printing the sand mold 100, the cavity structure, the sand block 200 and the connecting body 220 into a whole by a 3D printer according to the design structure. Wherein, sand mold 100, sand block 200 and connector 220 are paved with sand and sprayed with adhesive, and a closed gap 300 can be formed after printing; the gaps 300 between the inner wall of the cavity structure, the sand block 200 and the connecting body 220 are only paved with sand without spraying adhesive, and after printing, the scattered sand in the gaps 300 is sealed.
The 3D printed sand mold after application and curing is applied, tu Naihuo coating is applied to the surface of the sand mold 300, and the coating is not applied to the inner wall of the cavity structure because the outer surface formed by the sand block 200 and the connector 220 seals the inner wall of the cavity structure.
The chill is placed, the connector 220 is cut off circumferentially using a cutter or a slice, the sand block 200 is separated from the inner wall of the cavity structure, and the sand block 200 is taken out of the cavity structure, i.e., the cavity structure is exposed. As shown in fig. 3, the chill 400 is placed in the cavity structure, and the opening of the cavity structure is filled with resin sand and scraped, and the chill 400 is sealed in the sand mold 100 to form the sand barrier 500.
In the embodiment disclosed in the invention, in the design step, the sand collecting groove 110 is designed at the bottom of the cavity structure, and the sand collecting groove 110 can be distributed along the bottom of the cavity structure for a circle, preferably an annular groove. Correspondingly, a convex part 210 is designed on one side of the sand block 200 facing the bottom of the cavity structure, and the structure and the size of the convex part 210 are matched with those of the sand collecting groove 110. A gap 300 is also designed between the protrusion 210 and the sand collecting groove 110. In the printing step, the sand collecting groove 110, the convex part 210, and the gap 300 between the sand collecting groove 110 and the convex part 210 are also integrally printed and formed together with the sand mold 100, wherein the convex part 210 is sanded and sprayed with the adhesive, and the gap 300 between the sand collecting groove 110 and the convex part 210 is only sanded and not sprayed with the adhesive. In the step of placing the chill, after the sand block 200 is taken out from the cavity structure, the convex portion 210 and the sand block 200 are taken out from the cavity structure together, a part of sand collecting groove 110 is empty, and loose sand in a gap 300 between the sand block 200 and the inner wall of the cavity structure can fall into or be pushed into the sand collecting groove 110 by the chill 400, so that the placement of the chill 400 into the sand mold 100 is not affected.
In the embodiment disclosed in the invention, the distance between the connecting body 220 and the opening of the cavity structure is 3 mm-5 mm, i.e. the connecting body 220 is arranged in the cavity structure and 3 mm-5 mm from the opening.
In the embodiment disclosed in the present invention, a chill information identifier, such as a chill model number, a chill number, etc., may be designed on the side of the sand block body 200 facing the opening of the cavity structure. The chill information mark can be printed and formed together in the printing step, and only the corresponding chill 400 is selected according to the chill information mark in the subsequent step.
In the embodiment disclosed by the invention, after the chill 400 is sealed in the sand mold 100 and the sand barrier 500 is formed in the chill placing step, the sand mold 100 can be moved after at least 10 minutes of standing, so as to ensure the solidification of the sand barrier 500.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (8)
1. The method for 3D printing of the built-in chill of the sand mold is characterized by comprising the following steps of:
Designing, namely designing a cavity structure for accommodating a chill on the surface of a sand mold, designing a sand block in the cavity structure, and arranging a gap between the sand block and the inner wall of the cavity structure; a connector is arranged between the opening of the cavity structure and the sand block body to seal the gap;
printing, namely printing by a 3D printer, sanding the sand mold, the sand block body and the connecting body, and spraying an adhesive; the gaps are only paved with sand without spraying adhesive;
Applying a fire resistant coating to the sand mold surface;
placing a chill, cutting off the connecting body, taking out the sand block body from the cavity structure, placing the chill into the cavity structure and filling up the chill by using resin sand.
2. The method for 3D printing a built-in chill of a sand mold according to claim 1, wherein the thickness of the connecting body is 3mm to 5mm.
3. The method for 3D printing a built-in chill of a sand mold according to claim 1, wherein the connecting body is arranged at a position of 3 mm-5 mm at an inner side end of an opening of the cavity structure.
4. The method for 3D printing a sand mold built-in chill according to claim 1, wherein the gap is 1mm to 2mm.
5. The method for 3D printing a built-in chill of a sand mold according to claim 1, wherein a sand collecting groove is designed at the bottom of the cavity structure, and a convex part matched with the sand collecting groove is designed on the sand block body; and in the step of placing the chill, the loose sand at the gap is pushed into the sand collecting groove.
6. The method for 3D printing a built-in chill of a sand mold according to claim 1, wherein the sand collection groove is an annular groove.
7. The method for 3D printing a built-in chill of a sand mold according to claim 1, wherein a chill information mark is arranged at the outer side end of the sand block body.
8. The method of 3D printing a built-in chill of a sand mold according to any one of claims 1 to 7, wherein after the step of placing a chill, the chill is placed into the cavity structure and filled with resin sand, the sand mold is left to stand for at least 10 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410064216.8A CN118002761A (en) | 2024-01-17 | 2024-01-17 | Method for 3D printing of built-in chill of sand mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410064216.8A CN118002761A (en) | 2024-01-17 | 2024-01-17 | Method for 3D printing of built-in chill of sand mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118002761A true CN118002761A (en) | 2024-05-10 |
Family
ID=90957513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410064216.8A Pending CN118002761A (en) | 2024-01-17 | 2024-01-17 | Method for 3D printing of built-in chill of sand mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118002761A (en) |
-
2024
- 2024-01-17 CN CN202410064216.8A patent/CN118002761A/en active Pending
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