CN114799054A - Chilling block for 3D printing sand mold and using method thereof - Google Patents
Chilling block for 3D printing sand mold and using method thereof Download PDFInfo
- Publication number
- CN114799054A CN114799054A CN202210398084.3A CN202210398084A CN114799054A CN 114799054 A CN114799054 A CN 114799054A CN 202210398084 A CN202210398084 A CN 202210398084A CN 114799054 A CN114799054 A CN 114799054A
- Authority
- CN
- China
- Prior art keywords
- chilling
- sand mold
- component
- printing
- particles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004576 sand Substances 0.000 title claims abstract description 95
- 238000010146 3D printing Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000002245 particle Substances 0.000 claims abstract description 46
- 238000005266 casting Methods 0.000 claims abstract description 28
- 239000011230 binding agent Substances 0.000 claims abstract description 18
- 239000000203 mixture Substances 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000003054 catalyst Substances 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- 239000005011 phenolic resin Substances 0.000 claims description 12
- 229920001568 phenolic resin Polymers 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 4
- WDPYDDUVWLUIDM-UHFFFAOYSA-N ethyl carbamate;phenol Chemical group CCOC(N)=O.OC1=CC=CC=C1 WDPYDDUVWLUIDM-UHFFFAOYSA-N 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- MHDVGSVTJDSBDK-UHFFFAOYSA-N dibenzyl ether Chemical compound C=1C=CC=CC=1COCC1=CC=CC=C1 MHDVGSVTJDSBDK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920001228 polyisocyanate Polymers 0.000 claims description 3
- 239000005056 polyisocyanate Substances 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 235000019580 granularity Nutrition 0.000 abstract description 9
- 238000009825 accumulation Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 26
- 229910052742 iron Inorganic materials 0.000 description 13
- 238000013461 design Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000007767 bonding agent Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007885 magnetic separation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003110 molding sand Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000007790 scraping Methods 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
- 239000007858 starting material Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
- B22C1/22—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins
- B22C1/2233—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- B22C1/2246—Condensation polymers of aldehydes and ketones
- B22C1/2253—Condensation polymers of aldehydes and ketones with phenols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention relates to a chilling block for a 3D printing sand mold, which is formed by bonding chilling particles through a binder, wherein the granularity of the chilling particles comprises 30 meshes, 40 meshes and 70 meshes, and the weight ratio of the chilling particles with all granularities is (4-5): (5-6): 8-9). The invention also discloses a use method of the chilling block for the 3D printing sand mold, wherein the chilling particles are bonded and molded by adopting the binder and are synchronously arranged in the 3D printing sand mold, and the prepared post-positioned chilling block not only has the strength required by casting the chilling block, but also can play the chilling role of the chilling block. According to the chilling block for the 3D printing sand mold, the density and the heat conductivity coefficient of the chilling block are increased through the maximum density accumulation of the chilling particles, the volume specific heat capacity of the chilling block is improved on the basis of reducing the using amount of the chilling particles, and the chilling capacity of the chilling block is enhanced; the method is not limited by the casting structure, avoids designing special shape-following chilling blocks for the castings with complex structures, shortens the production period and saves the production cost.
Description
Technical Field
The invention relates to the technical field of chills, in particular to a chiller for a 3D printing sand mold and a using method thereof.
Background
In the casting process, a chill is often required to be arranged at a proper position of a casting and matched with a riser to control the solidification sequence of the casting, so that the feeding efficiency of the riser is improved, the casting is prevented from generating shrinkage cavities and shrinkage porosity, and the compactness of the casting is improved; in addition, the use of the chilling blocks can accelerate the local cooling speed of the casting, eliminate local thermal stress and prevent deformation and cracks; and the cooling speed of some special parts of the casting is accelerated, the matrix structure is refined, and the mechanical property of the casting is improved.
The 3D printing sand mold is formed by laying a designed sand mold model layer by adopting an additive manufacturing technology. The sand mold produced by adopting the 3D printing technology is not limited by the shape, and can be printed in any shape except a closed cavity. But the 3D printing sand mould can only be a material, can not directly set up the chill at the sand mould printing in-process directly. For solving the problem that 3D prints the sand mould and sets up the chill, prior art adopts more to reserve the chill when the sand mould is printed and holds the chamber, prints the completion back at the sand mould, fixes the chill monoblock at the chill through modes such as bonding, landfill and mechanical fastening and holds the chamber, but this method all has following problem:
in the aspect of the size, because the chill uses wearing and tearing repeatedly and places the chamber with design standard size in process of production and all has certain size deviation, the too big problem of border interval after chill and sand mould outward appearance exist the wrong platform and place, makes the chill hold the chamber and to the fracture effect aggravation of sand mould along border interval, easily takes place stress concentration during the handling upset and leads to destroying. In the aspect of a fixing mode, the chilling block is generally adhered in the chilling block accommodating cavity by using an adhesive, and the method has the defects that the adhesion quality is unstable, and the chilling block easily falls into molten iron, so that a casting is scrapped.
For some sand molds with special structures, a chill cannot be directly arranged, a through hole is reserved in advance at the position where the chill is required to be arranged in the sand mold and extends into the sand mold from the outside, the reserved through hole is divided into two layers of steps, and the chills for processing the two layers of steps are manufactured in a matched manner. In addition, for chilling of special structural positions of some castings, special free-form chills need to be manufactured, and the problems of long manufacturing period, high manufacturing cost and difficulty in rear positioning and fixing are caused no matter the casting special cast iron chills or the processing graphite chills are manufactured.
Disclosure of Invention
Therefore, the cold iron for the 3D printing sand mold and the use method thereof are needed to solve the technical problems that the cold iron in the 3D printing sand mold is difficult to arrange, the bonding operation of the post-positioned cold iron is difficult, the matching precision is poor, the derived appearance quality is poor, the formed cold iron is creased along the periphery, the choking is easy to occur, the production cost is high and the like, and are easy to stably arrange, good in chilling effect, recyclable and free of bonding with the sand mold.
In order to solve the problems, the invention adopts the following technical scheme:
the embodiment of the invention discloses a chilling block for a 3D printing sand mold, which is arranged in a casting sand mold, wherein the chilling block for the 3D printing sand mold is formed by bonding chilling particles through a binder; the particle size of the chilling particles comprises 30 meshes, 40 meshes and 70 meshes, and the weight ratio of the chilling particles with the particle sizes is (4-5): (5-6): (8-9).
Further, the chilled particles include at least one of steel grit, graphite, and silicon carbide.
Preferably, the steel grit is made of low-carbon steel.
Optimally, the steel grit comprises two grades of S030 and S060, and the weight ratio of the two grades of steel grit is 1: 1.
Further, the binder is a phenol urethane self-hardening resin.
Further, the phenol urethane self-hardening resin comprises a component A, a component B and a component C; the weight of the component A and the component B is 1% -1.5% of the weight of the chilling particle, and the weight ratio of the component A to the component B is (60-45): (40-55); the component A is a benzyl ether phenolic resin solution, the component B is a polyisocyanate solution, the component C is a catalyst, and the weight of the catalyst is 1-3% of that of the component A.
Preferably, the weight of the catalyst is 2-3% of the component A.
Further, the binder comprises alkaline phenolic resin and carbon dioxide gas, and the weight of the alkaline phenolic resin is 2.5-3.5% of that of the chilled particles.
In a second aspect, the method for using the chill for the 3D printing sand mold includes the following steps:
sand mould treatment: a cavity for containing the chilling block is arranged at the position, needing chilling, of the 3D printing sand mold;
preparing materials: uniformly mixing the chilled particles with the binder to obtain a mixture;
filling: filling the mixture into the cavity, compacting and leveling;
hardening: the mixture to be filled into the cavity hardens and acts as a chill during casting.
Further, the cross section of the cavity is gradually reduced along the direction deviating from the 3D printing sand mold.
The technical scheme adopted by the invention can achieve the following beneficial effects:
the chilling block for the 3D printing sand mold disclosed by the invention adopts a single bonding system or a multi-bonding system to bond and form chilling particles with three granularities, so that the chilling block not only has the strength required by casting the chilling block, but also can play the chilling role of the chilling block; the density and the heat conductivity coefficient of the chilling block are increased by the maximum density accumulation of the chilling particles, the volume specific heat capacity of the chilling block is improved on the basis of reducing the volume and the weight of the chilling particles, and the chilling capability of the chilling block is enhanced.
The chiller for the 3D printing sand mold disclosed by the invention is not limited by a casting structure, a special-purpose conformal chiller is not designed for a complex-structure casting, the production period is shortened, and the production cost is saved; according to the casting structure needs, can design into arbitrary shape, need not the monoblock and bond and can solidify as an organic whole with the sand mould, improve the chilling effect, promote foundry goods quality.
The chill for the 3D printing sand mold disclosed by the invention has no problems of sand sticking and the like after pouring, is broken and regenerated together with molding sand after boxing, is separated by a sand treatment system in the modes of magnetic separation, screening and the like, can be recycled, and has lower use cost; the sand mould and the chill are solidified into a whole, the cavity can repair the cutting crack of the sand mould, and the reliability of the lifting and turning process of the sand mould is effectively ensured.
Drawings
FIG. 1 is a cross-sectional view of a 3D printing sand mold;
fig. 2 is a cross-sectional view of the sand mold of fig. 1 after a chill for a 3D printing sand mold disclosed in an embodiment of the present invention is disposed thereon.
Description of the reference numerals:
1-sand mold, 2-cavity, and 3-3D printing chill for the sand mold.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. 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.
The starting materials, reagents or apparatuses used in the following examples are conventionally commercially available or can be obtained by conventionally known methods, unless otherwise specified.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "top," "bottom," "top," and the like are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The embodiment of the invention discloses a chilling block for a 3D printing sand mold, which is formed by bonding chilled particles through a bonding agent, wherein the bonding agent can be a single-component bonding agent or a multi-component bonding agent, and the invention does not need to do specific requirements. Compared with the existing chilling block for casting, the chilling block for 3D printing sand mould disclosed by the embodiment of the invention is not limited by the structure of the casting, does not need to be adhered with the sand mould in a whole block, and is particularly suitable for castings with complex structures and/or thin walls. The chilling particles of the chilling iron for the 3D printing sand mold disclosed by the embodiment of the invention specifically comprise three granularities of 30 meshes, 40 meshes and 70 meshes, and the weight ratio of the chilling particles of each granularity is (4-5): (5-6): 8-9) in the case that the chilling particles are 30 meshes, 40 meshes and 70 meshes. The granularity proportion is that the mixed chilling particles reach the optimal volume specific heat capacity and heat conductivity coefficient, and have the optimal chilling effect which is 45 to 50 percent of the cast iron chilling block in unit volume; the grain size ratio reduces the usage amount of chilling particles to the maximum extent and reduces the size of the chilling iron on the premise of considering the chilling effect so as to avoid the reduction of the fracture strength of the sand mould, reduce the cost and simplify the operation.
In the embodiment of the invention, the chilling particles can be steel grit, graphite or silicon carbide; preferably low-carbon steel grit which is spherical in appearance and has uniform tempered martensite or troostite structure; the low-carbon steel sand has a higher melting point than the iron casting, does not have the problems of sand sticking and the like after casting, can be regenerated together with molding sand after being unpacked, and can be repeatedly utilized by means of separation of a sand treatment system in a magnetic separation mode, a screening mode and the like, and the production cost is reduced.
Further, the chilling effect of the iron cooler per unit volume is density specific heat capacity and heat conductivity coefficient, so that the chilling capability of the mixed steel sand is improved on the premise of reducing the volume as much as possible. When the weight ratio of the steel grit with each granularity is 30 meshes to 40 meshes to 70 meshes, (4-5) to (5-6) to (8-9), the steel grit with small granularity is filled in gaps among the steel grit with large granularity, so that the stacking density is improved, the density is improved, and the heat conductivity coefficient is further improved. To go intoAnd (3) increasing the bulk density of the mixed steel grit in one step, and mixing the steel grit of two grades of S030 and S060 in GB/T18838.4-2008. Preferably, the weight ratio of the two grades of steel sand is 1:1, and the density of the chilling block is more than or equal to 5.2g/cm 3 。
In an alternative embodiment of the invention, the binder is phenol urethane self-hardening resin, and the cold iron prepared by using the binder has high strength, low resin addition amount and low gas evolution. The binder is a three-component binding system and comprises a component A, a component B and a component C, wherein the component A is a benzyl ether phenolic resin solution, the component B is a polyisocyanate solution, the weight of the component A plus the component B is 1-1.5% of the weight of the chilled particles, and the weight ratio of the component A to the component B is (60-45): the weight ratio of the carbon fiber to the carbon fiber is adjustable (40-55), and preferably 50: 50. The component C is a catalyst, the weight of the catalyst is 1-3% of that of the component A, and the usable time of the chilling particles of the mixed binder is 2-10 minutes. Preferably, the weight of the catalyst is 2-3% of that of the component A, and the usable time of the chilled particles of the mixed binder is 2-4 minutes, so that the rapid production is met, and the production efficiency is improved. It should be noted that the kind of the catalyst can be adjusted according to the size of the chiller, as long as the catalyst is matched with any one of the component a and the component B, and the invention is not limited to this.
Further, the catalyst may be added to the chilled particles alone or with component a. When the catalyst is added with the component A, the catalyst and the component A need to be fully stirred and uniformly mixed.
In another optional embodiment of the invention, the adhesive is a two-component adhesive system, specifically, the adhesive system comprises alkaline phenolic resin and carbon dioxide gas, the addition amount of the alkaline phenolic resin is 2.5-3.5% of the weight of the chilled particles, the chilled particles and the alkaline phenolic resin are uniformly mixed and molded, and then the carbon dioxide gas is blown into the mixture for hardening. The flow rate of the carbon dioxide can be controlled to be 10L/min-25L/min, the blowing time can be 10 seconds-10 minutes, and the adjustment is specifically carried out according to the size of the chilling block, and the invention is not particularly limited to this.
The embodiment of the invention also discloses a use method of the chilling block for the 3D printing sand mold, which comprises the following steps:
and S1, determining the positions of the chills to be arranged on the casting and the shape and the size of the chills through calculation and software simulation.
And S2, as shown in figure 1, according to the size, shape and position of the cold iron, reserving a cavity 2 for accommodating the cold iron when the sand mould 1 is designed, wherein the cavity 2 extends inwards to a certain depth along the surface of the sand mould, and the size and depth of the cross section of the cavity 2 are determined by the cold iron to be arranged. Preferably, the cavity 2 is provided with a slope along the circumference so that the section of the cavity 2 along the direction departing from the sand mold 1 is gradually reduced, and the chill is prevented from falling to the cavity under the influence of gravity after the mold is turned over and assembled; the inclination is preferably 2 to 10. Optimally, the inner wall of the cavity 2 can be also provided with a groove sand hanging structure along the periphery.
And S3, importing the S2 design data into 3D printing equipment, printing the sand mold 1, cleaning sand after printing, and cleaning the non-bonded loose sand in the cavity 2 by using compressed air in a pneumatic mode.
And S4, uniformly mixing the chilled particles, adding the binder into the chilled particles, and uniformly mixing to obtain a mixture.
S5, filling the mixture into the cavity 2 during the usable time of the mixture, compacting, and scraping the mixture according to the circumferential reference surface of the cavity 2.
And S6, as shown in figure 2, after the mixture in the cavity 2 is hardened, obtaining the chilling block 3 for the 3D printing sand mold, and arranging the chilling block in the sand mold 1.
And S7, turning to the next procedure, performing a painting step on the sand mold 1, and performing the same coating and drying operation on the outer surface of the chill 3 for 3D printing of the sand mold as the sand mold 1.
And S8, after drying, chilling the chill 3 for the 3D printing sand mold in the pouring process.
Specifically, when the binder is phenolic urethane self-hardening resin, in the step S4, the catalyst may be added to the component a first and stirred uniformly, the mixture may be added to the chilled particles, the mixture may be stirred and mixed uniformly, the component B may be added to the mixture, and the mixture may be stirred and mixed uniformly to obtain the final mixture; or adding the component A into the chilled particles and uniformly stirring, then adding the component B and uniformly stirring, then adding the catalyst and uniformly stirring to obtain the final mixture.
When the binder is alkaline phenolic resin, the alkaline phenolic resin is added to the chilled particles in step S4 and stirred uniformly, and after the step S5 is completed, carbon dioxide gas is blown into the mixture in the cavity 2 to harden the mixture.
In an optional embodiment of the invention, the cavity 2 can be used as a sand mold structure and added into a sand mold 3D printing design scheme at the beginning of design, and is synchronously arranged and printed with a 3D printing sand mold.
In an alternative embodiment of the invention, the cavity 2 can be mechanically excavated as a sand mould structure after the sand mould is shaped.
The chilling block for the 3D printing sand mold disclosed by the invention effectively solves the problems that the strength of the sand mold is insufficient due to a gap between the sand mold and the chilling block in the traditional chilling block placing mode, the sand mold is easy to damage in the hoisting process, the chilling particle mixture and the sand mold are integrated, and the reliability of the hoisting and turning process of the sand core is ensured; the problems that the traditional rear-mounted chiller mode is difficult to bond and operate, the matching precision is poor, the derived appearance quality is poor, the chiller is formed along the circumferential fash and the choking fire is easy to occur and the like are effectively solved, the operability of the chiller arranged in the 3D printing sand mold is greatly improved, the problems that the production period of the chiller special for design and production is long, the cost is high and the like are solved, and meanwhile, the subsequent cleaning efficiency is further improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (10)
1. A chilling block for a 3D printing sand mold is arranged in a casting sand mold and is characterized in that the chilling block for the 3D printing sand mold is formed by bonding chilling particles through a binder; the particle size of the chilling particles comprises 30 meshes, 40 meshes and 70 meshes, and the weight ratio of the chilling particles with the particle sizes is (4-5): (5-6): 8-9).
2. A chill for a sand mold for 3D printing according to claim 1, wherein said chilled particles comprise at least one of steel grit, graphite and silicon carbide.
3. The chiller for a 3D printing sand mold according to claim 2, wherein the steel sand is made of low-carbon steel.
4. A chill for a sand mold for 3D printing according to claim 3, wherein said steel grit comprises two grades of S030 and S060, and the weight ratio of the two grades of steel grit is 1: 1.
5. A chill for a 3D printing sand mold according to claim 1, wherein said binder is a phenol urethane self-hardening resin.
6. A chill for a sand mold for 3D printing according to claim 1, wherein said phenolic urethane self-hardening resin comprises component A, component B and component C; the weight of the component A and the component B is 1-1.5% of the weight of the chilling particle, and the weight ratio of the component A to the component B is (60-45): (40-55);
the component A is a benzyl ether phenolic resin solution, the component B is a polyisocyanate solution, the component C is a catalyst, and the weight of the catalyst is 1-3% of that of the component A.
7. A chill for a 3D printing sand mold according to claim 6, wherein the weight of the catalyst is 2-3% of the component A.
8. A chill for a 3D printing sand mold according to claim 1, wherein the binder comprises an alkaline phenolic resin and carbon dioxide gas, the weight of the alkaline phenolic resin being 2.5-3.5% of the weight of the chilled particles.
9. The use method of the chilling block for the 3D printing sand mold according to any one of claims 1 to 8 is characterized by comprising the following steps:
sand mould treatment: a cavity for containing the chilling block is arranged at the position, needing chilling, of the 3D printing sand mold;
preparing materials: uniformly mixing the chilled particles with the binder to obtain a mixture;
filling: filling the mixture into the cavity, compacting and leveling;
hardening: the mixture to be filled into the cavity hardens and acts as a chill during casting.
10. Use of a chill for a 3D printing sand mold according to claim 9, wherein said cavity has a decreasing cross-section in a direction away from said 3D printing sand mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210398084.3A CN114799054A (en) | 2022-04-18 | 2022-04-18 | Chilling block for 3D printing sand mold and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210398084.3A CN114799054A (en) | 2022-04-18 | 2022-04-18 | Chilling block for 3D printing sand mold and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114799054A true CN114799054A (en) | 2022-07-29 |
Family
ID=82535740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210398084.3A Pending CN114799054A (en) | 2022-04-18 | 2022-04-18 | Chilling block for 3D printing sand mold and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114799054A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117020121A (en) * | 2023-10-10 | 2023-11-10 | 陇东学院 | 3D printing sand mold chill device and preparation method |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102847907A (en) * | 2012-09-28 | 2013-01-02 | 贵州安吉航空精密铸造有限责任公司 | Disposable chilling block and manufacturing method thereof |
| CN103056300A (en) * | 2012-12-27 | 2013-04-24 | 天瑞集团铸造有限公司 | Production process for high-strength sand moulds and cores added with novel chill |
| CN103567353A (en) * | 2012-07-30 | 2014-02-12 | 大连远景铸造有限公司 | Steel moulding sand and manufacturing technology thereof |
| CN103909223A (en) * | 2014-04-10 | 2014-07-09 | 国营第六一六厂 | Collapsible cold iron composite material and application method thereof |
| CN104308156A (en) * | 2014-11-13 | 2015-01-28 | 四川南车共享铸造有限公司 | Composition for three-dimensional print casting and applications thereof |
| CN108262449A (en) * | 2018-03-06 | 2018-07-10 | 溧阳市联华机械制造有限公司 | A kind of method that hot box makes forming graphite chill |
| CN108326264A (en) * | 2018-03-06 | 2018-07-27 | 溧阳市联华机械制造有限公司 | A kind of method that cold-box makes forming graphite chill |
| CN108393429A (en) * | 2018-03-06 | 2018-08-14 | 溧阳市联华机械制造有限公司 | A kind of special Quench magnetism precoated sand and preparation method thereof |
| CN108421960A (en) * | 2018-03-19 | 2018-08-21 | 河北硕凯铸造有限公司 | One kind is with type chill and its preparation process |
| CN109774130A (en) * | 2017-11-13 | 2019-05-21 | 科华控股股份有限公司 | A kind of 3D printing forming graphite chill and preparation method thereof |
| CN110252940A (en) * | 2019-07-05 | 2019-09-20 | 宁波永祥铸造有限公司 | A kind of casting core material and core-making method |
| CN113695513A (en) * | 2021-09-03 | 2021-11-26 | 王绍勤 | Water glass steel sand casting mould and preparation method thereof |
| CN114210944A (en) * | 2021-11-29 | 2022-03-22 | 四川维珍高新材料有限公司 | Composite 3D printing preparation method of casting sand mold with chilling block and casting sand mold |
-
2022
- 2022-04-18 CN CN202210398084.3A patent/CN114799054A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567353A (en) * | 2012-07-30 | 2014-02-12 | 大连远景铸造有限公司 | Steel moulding sand and manufacturing technology thereof |
| CN102847907A (en) * | 2012-09-28 | 2013-01-02 | 贵州安吉航空精密铸造有限责任公司 | Disposable chilling block and manufacturing method thereof |
| CN103056300A (en) * | 2012-12-27 | 2013-04-24 | 天瑞集团铸造有限公司 | Production process for high-strength sand moulds and cores added with novel chill |
| CN103909223A (en) * | 2014-04-10 | 2014-07-09 | 国营第六一六厂 | Collapsible cold iron composite material and application method thereof |
| CN104308156A (en) * | 2014-11-13 | 2015-01-28 | 四川南车共享铸造有限公司 | Composition for three-dimensional print casting and applications thereof |
| CN109774130A (en) * | 2017-11-13 | 2019-05-21 | 科华控股股份有限公司 | A kind of 3D printing forming graphite chill and preparation method thereof |
| CN108326264A (en) * | 2018-03-06 | 2018-07-27 | 溧阳市联华机械制造有限公司 | A kind of method that cold-box makes forming graphite chill |
| CN108393429A (en) * | 2018-03-06 | 2018-08-14 | 溧阳市联华机械制造有限公司 | A kind of special Quench magnetism precoated sand and preparation method thereof |
| CN108262449A (en) * | 2018-03-06 | 2018-07-10 | 溧阳市联华机械制造有限公司 | A kind of method that hot box makes forming graphite chill |
| CN108421960A (en) * | 2018-03-19 | 2018-08-21 | 河北硕凯铸造有限公司 | One kind is with type chill and its preparation process |
| CN110252940A (en) * | 2019-07-05 | 2019-09-20 | 宁波永祥铸造有限公司 | A kind of casting core material and core-making method |
| CN113695513A (en) * | 2021-09-03 | 2021-11-26 | 王绍勤 | Water glass steel sand casting mould and preparation method thereof |
| CN114210944A (en) * | 2021-11-29 | 2022-03-22 | 四川维珍高新材料有限公司 | Composite 3D printing preparation method of casting sand mold with chilling block and casting sand mold |
Non-Patent Citations (1)
| Title |
|---|
| 《铸造技术标准手册》编委会编: "铸造技术标准手册", 中国物资出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117020121A (en) * | 2023-10-10 | 2023-11-10 | 陇东学院 | 3D printing sand mold chill device and preparation method |
| CN117020121B (en) * | 2023-10-10 | 2023-12-22 | 陇东学院 | 3D printing sand mold chill device and preparation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102921902B (en) | Composite shaping technique method of iron pattern coated sand and iron type core assembly | |
| CN109175307A (en) | A kind of 3D printing sand mold antigravity casting forming method | |
| CN104525870A (en) | Manufacturing method of buffer box body | |
| RU2013158938A (en) | SUBSURFACE REFRIGERATORS FOR IMPROVEMENT OF FORMATION OF TOOTH OF AUTOCHAIN OF RAILWAY CARS | |
| CN101898228A (en) | Method for casting sound casting by using lost foam coated with high-performance coating in vibration way | |
| CN109332578A (en) | A kind of containerless casting manufacturing process freezing clay-bonded sand | |
| JP5867939B1 (en) | Material for additive manufacturing, method for producing mold by powder fixed lamination method, and mold | |
| CN114769547A (en) | Chilling block for 3D printing sand mold and using method thereof | |
| CN103273007A (en) | Casting technique of V12-type engine cylinder block | |
| CN114799054A (en) | Chilling block for 3D printing sand mold and using method thereof | |
| CN109047667A (en) | A kind of buhl saw bearing block casting technique | |
| CN106238680A (en) | A kind of lost foam casting process of automobile saddle-type traction base | |
| CN111496185A (en) | Production process of lost foam casting | |
| CN103182474A (en) | Manufacturing method for casting sand core | |
| US8813811B1 (en) | Forming a mold for steel casting | |
| CN104353789A (en) | Preparation method of sand casting sand core and prepared sand core | |
| CN109093073A (en) | A kind of cast shaping process based on evaporative pattern | |
| CN105364010A (en) | Evaporative pattern casting process preventing deformation | |
| CN111390115B (en) | Wear-resistant part shell mold casting method | |
| CN103143677A (en) | Composite casting technology for hardening alkaline phenolic resin sand and water-glass sand by using CO2 | |
| US6463991B1 (en) | Iron alloy casting method and apparatus | |
| CN205414310U (en) | Metal liquid is poured into a mould lost pattern casting that disappears and is used white membrane module | |
| CN114472804A (en) | Process for casting rear seat of large-scale loader of ductile iron by V method | |
| CN105364008A (en) | Evaporative pattern casting process | |
| CN105618670A (en) | Lost foam pattern assembly for molten metal pouring lost foam casting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220729 |