CN114130962A - Laminated injection molding method for precoated sand shell - Google Patents
Laminated injection molding method for precoated sand shell Download PDFInfo
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- CN114130962A CN114130962A CN202111374903.2A CN202111374903A CN114130962A CN 114130962 A CN114130962 A CN 114130962A CN 202111374903 A CN202111374903 A CN 202111374903A CN 114130962 A CN114130962 A CN 114130962A
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- 239000004576 sand Substances 0.000 title claims abstract description 178
- 238000001746 injection moulding Methods 0.000 title claims abstract description 36
- 238000000465 moulding Methods 0.000 claims abstract description 63
- 238000000034 method Methods 0.000 claims abstract description 37
- 235000019580 granularity Nutrition 0.000 claims abstract description 33
- 238000005488 sandblasting Methods 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 15
- 238000003860 storage Methods 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 164
- 238000004519 manufacturing process Methods 0.000 abstract description 26
- 239000006004 Quartz sand Substances 0.000 abstract description 19
- 238000005266 casting Methods 0.000 abstract description 19
- 238000005507 spraying Methods 0.000 abstract description 7
- 230000035699 permeability Effects 0.000 abstract description 6
- 239000010419 fine particle Substances 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 5
- 239000011362 coarse particle Substances 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 19
- 244000035744 Hura crepitans Species 0.000 description 10
- 239000002245 particle Substances 0.000 description 8
- 230000006872 improvement Effects 0.000 description 7
- 230000007547 defect Effects 0.000 description 5
- 238000000748 compression moulding Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000005058 metal casting Methods 0.000 description 3
- 239000003110 molding sand Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000007528 sand casting Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000009718 spray deposition Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/23—Compacting by gas pressure or vacuum
- B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
-
- 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
- B22C13/00—Moulding machines for making moulds or cores of particular shapes
- B22C13/08—Moulding machines for making moulds or cores of particular shapes for shell moulds or shell cores
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Casting Devices For Molds (AREA)
Abstract
The invention relates to a method for layered injection molding of a precoated sand shell mold, which adopts an injection molding machine to sequentially inject a plurality of precoated sands with different granularities on the surface of a molding mold to obtain a sand mold with a granularity gradient. Placing the molding die into a molding machine shell, and heating the molding die by using a heating device; and then, sand blasting is started, the sand blasting process is sequentially carried out according to the process that the granularity of the precoated sand is increased from small to large, after the sand blasting is finished, the precoated sand is naturally cooled and shaped, and finally the sand mold is taken out. The method comprises the steps of firstly spraying a layer of fine sand on the surface of a mould to form the innermost layer of a sand mould, so that the surface quality of a casting is improved; the middle layer of the sand mold adopts precoated sand with moderate granularity; the outer layer adopts coarse sand grains, so that the air permeability of the sand mold is improved. The waste fine-particle quartz sand and the waste coarse-particle quartz sand in the traditional sand mold process are fully utilized, the consumption of ineffective quartz sand is reduced, the production cost of the sand mold is reduced, and the quality level of the casting is improved.
Description
Technical Field
The invention belongs to the field of metal casting, and particularly relates to a method for manufacturing a coated quartz sand shell mold.
Background
Sand casting is a casting process for producing metal castings by pouring a metal melt in a sand mold. Steel, iron and most nonferrous metal castings can be obtained by sand casting. The molding material used by sand casting is cheap and easy to obtain, the sand mold is simple to manufacture, and the method is suitable for single-piece production and batch production of castings and is a basic process of casting production for a long time.
The sand mold manufacturing procedure is complex, manual manufacturing is usually adopted, the production efficiency is low, and the cost is high. Therefore, sand mold manufacturing equipment is gradually becoming more automated. Currently, sand mold manufacturing equipment can be generally divided into three categories: jolt molding machines, jolt squeeze molding machines, and injection and compression molding machines. The injection-compression molding machine has the advantages of low noise, low labor intensity of workers, high production efficiency, less environmental pollution and the like. Therefore, injection and compression molding machines have become the focus of current sand mold manufacturing equipment development.
The injection and compression molding machine is used for uniformly injecting molding sand onto the surface of a mold by using compressed air to perform pre-compaction, and then applying pressure to perform compaction. Mainly comprises a vertical parting flaskless shooting and pressing molding machine and a horizontal parting flaskless shooting and pressing molding machine. The vertical parting flaskless shooting and pressing molding machine does not need a sand box for molding, molding sand is directly shot into a molding chamber with a template, the size precision of the manufactured sand mould is high, the production rate is very high because the two surfaces of the sand box are provided with cavities, but core setting is difficult, and the requirement on the quality of the molding sand is strict. The horizontal parting and stripping injection molding machine utilizes the sand box to mold, and the sand mold is closed and stripped after being manufactured, so that core setting is convenient, and the production efficiency is high. The horizontal parting flask-removing injection molding machine is difficult to manufacture and high in sand mold manufacturing cost, so that the application in China is less at present.
The granularity of the precoated sand has great influence on the overall quality of the casting, the larger sand can cause the problems of reduced surface finish, generation of burrs, gaps and the like, and the smaller sand can cause the defects of low air permeability of the sand mold, generation of air holes in the casting, insufficient pouring and the like. At present, in order to solve the problem, most of quartz sand with moderate granularity is adopted for film coating, fine sand and coarse sand are not fully utilized, the consumption of the quartz sand is increased, and the production cost of the sand mold is higher.
Disclosure of Invention
Aiming at the problems in the prior art, the technical problems to be solved by the invention are as follows: provides a layered jet molding method of a precoated sand shell mold, which reduces the production cost.
In order to solve the technical problems, the invention adopts the following technical scheme: a method for laminated injection molding of a precoated sand shell type is carried out by adopting an injection molding machine, wherein the injection molding machine has the following structure:
comprises a molding machine shell and N sand storage boxes, wherein N is more than or equal to 2;
the N storage sand boxes are arranged above the molding machine shell, the bottom of each storage sand box is communicated with a conveying pipeline, each conveying pipeline penetrates through the top of the molding machine shell and then enters the molding machine shell, and the bottom of each conveying pipeline is provided with a sand shooting head;
a molding die and a heating device are arranged in the molding machine shell, the molding die is placed on the heating device, and all the sand shooting heads are positioned right above the molding die;
the method for performing the laminated injection molding of the precoated sand shell by using the injection molding machine comprises the following steps:
s1: putting N types of precoated sand with different granularities into N storage sand boxes respectively;
s2: placing the molding mold into a molding machine shell, and heating the molding mold to 150-200 ℃ by using a heating device;
s3: after the sand blasting pressure, the sand blasting time and the distance from the sand blasting port to the modeling mold are adjusted, sand blasting is started;
the sand blasting process is carried out in sequence according to the process that the granularity of the precoated sand is from small to large, and after the precoated sand with small granularity is fully paved in a layer in the molding mould, the precoated sand with larger granularity is paved and carried out in sequence;
s4: and after the coated sand with all the granularity is sprayed, stopping heating, and taking out the sand mold after the modeling mold and the coated sand in the modeling mold are naturally cooled and fixed.
As an improvement, each conveying pipeline is connected with a plurality of sand separating pipes respectively, each sand separating pipe is communicated with M sand separating branch pipes, M is larger than or equal to 2, and sand shooting heads are mounted at the bottoms of the sand separating branch pipes.
As an improvement, M sand shooting heads are distributed in a whole-line mode.
As an improvement, the injection molding machine further comprises a limiting disc, the sand separating branch pipes are telescopic pipes, a plurality of limiting holes are formed in the limiting disc, the bottoms of all the sand separating branch pipes correspondingly penetrate through the limiting holes one by one, and each sand separating branch pipe is in tight fit with the limiting hole.
As an improvement, the injection molding machine further comprises a transmission device, the transmission device comprises a motor and a screw rod, an output shaft of the motor is fixedly connected with the screw rod, and the screw rod penetrates through the limiting disc and is in threaded connection with the limiting disc.
As an improvement, the sand blasting pressure in the S3 is controlled to be 2-10 MPa.
As an improvement, the distance between the sand shooting opening and the mold in the S3 is 20-50 cm.
As an improvement, the sand blasting time in the step S3 is controlled to be 10-30S.
Compared with the prior art, the invention has at least the following advantages:
the method provided by the invention carries out granularity grading on the film-coated quartz sand, fully utilizes the waste fine-particle quartz sand and coarse-particle quartz sand in the traditional sand mold process, and adopts layered injection to manufacture the sand mold with a multilayer structure, thereby improving the quality level of castings. Firstly, spraying a layer of fine sand on the surface of a mould to form the innermost layer of a sand mould, so that the surface quality of a casting is improved, and the problems of burrs, gaps and the like on the surface of the casting are avoided; the middle layer of the sand mold adopts precoated sand with moderate granularity; the outer layer adopts thicker sand grains, so that the air permeability of the sand mold is improved, and the defects of air holes, insufficient pouring and the like generated inside the casting are avoided. The waste fine-particle quartz sand and the waste coarse-particle quartz sand in the traditional sand mold process are fully utilized, the consumption of ineffective quartz sand is reduced, the production cost of the sand mold is reduced, and the quality level of the casting is improved.
Drawings
FIG. 1 is a schematic diagram of a molding machine.
Fig. 2 is a schematic diagram of the arrangement of the sand shooting heads.
In the figure, a storage sand box-1, a conveying pipeline-2, a sand shooting head-3, a sand mould-4, a heating device-5, shakeout-6, a molding machine shell-7, a molding die-8, a limiting disc-9, a screw rod-10 and a motor-11.
Detailed Description
The present invention is described in further detail below.
In the present invention, 'front', 'rear', 'left', 'right', 'up', 'down' all refer to the orientation in fig. 1, wherein 'front' refers to being out with respect to the paper in fig. 1 and 'rear' refers to being in fig. 1.
Example, referring to fig. 1 and 2, a method of layered injection molding of a precoated sand shell type is performed using an injection molding machine having the following structure:
comprises a molding machine shell 7 and N sand storage boxes 1, wherein N is more than or equal to 2; the N storage sand boxes 1 are arranged above the molding machine shell 7, the bottom of each storage sand box 1 is communicated with a conveying pipeline 2, each conveying pipeline 2 penetrates through the top of the molding machine shell 7 and then enters the molding machine shell 7, and the bottom of each conveying pipeline 2 is provided with a sand shooting head 3.
A molding die 8 and a heating device 5 are arranged in the molding machine shell 7, the molding die 8 is placed on the heating device 5, and all the sand shooting heads 3 are positioned right above the molding die 8.
Preferably, each conveying pipeline 2 is respectively connected with a plurality of sand separating pipes, each sand separating pipe is communicated with M sand separating branch pipes, M is larger than or equal to 2, and the bottoms of the sand separating branch pipes are respectively provided with a sand shooting head 3. M penetrate sand head 3 and be the permutation distribution. The sand shooting heads 3 are arranged, so that the spraying time can be shortened, the production efficiency of a sand mold is improved, and the multi-point sand blasting is performed on the molding mold 11, so that the same layer of precoated sand can be laid more uniformly as far as possible, namely, the error of the thickness of each part of the precoated sand in the same layer is smaller. And the thickness consistency of the precoated sand with the same granularity in one layer can be further improved by the whole-line distribution of the sand shooting heads 3.
During specific implementation, for example, N =3 and M =9 are provided, each transportation pipeline 2 is connected with three sand separating pipes which are transversely arranged, and each sand separating pipe is connected with three sand separating branch pipes which are vertically arranged. Each of the sand magazines 1 stores therein precoated sand of one grain size, and a 9 × 9 array is formed by grouping three sand shooting heads 3 that respectively spray three grain sizes. As shown in fig. 2. The arrangement is mainly used for ensuring the thickness uniformity of the sprayed precoated sand with the same granularity in one layer as much as possible.
Preferably, the sand separating branch pipes are telescopic pipes and further comprise a limiting disc 9, a plurality of limiting holes are formed in the limiting disc 9, the bottoms of all the sand separating branch pipes correspondingly penetrate through the limiting holes one by one, and each sand separating branch pipe is in tight fit with the limiting hole.
Preferably, the injection molding machine further comprises a transmission device, and the distance between the sand shooting opening and the molding die 8 is controlled through the transmission device. The transmission device comprises a motor 11 and a screw rod 10, an output shaft of the motor 11 is fixedly connected with the screw rod 10, the screw rod 10 penetrates through the limiting disc 9 and is in threaded connection with the limiting disc 9, when the motor 11 rotates forwards and the screw rod 10 also rotates forwards, the limiting disc 9 in threaded connection with the screw rod 10 moves downwards, and therefore the sand branch pipe connected with the limiting disc 9 is driven to move downwards; when the motor 11 rotates reversely, the screw rod 10 rotates reversely, and the limiting disc 9 in threaded connection with the screw rod 10 moves upwards, so that the sand branch pipe connected with the limiting disc 9 is driven to move upwards. This makes it possible to adjust the distance between the sand shooting opening and the molding die 8.
Preferably, still include PLC controller and a plurality of solenoid valve, set up the solenoid valve of its break-make of control on every transport pipe way 2, all solenoid valves are connected with the PLC controller, predetermine the sandblast time in the PLC controller, then control the solenoid valve action through the PLC controller, finally realize the control to the sandblast time.
During the concrete implementation, can also select pressure regulation and control device, for example can select existing equipment such as air compressor, pressure regulation and control device and transportation pipeline 2 intercommunication, sandblast pressure is realized through changing compressed air pressure.
The method for performing the laminated injection molding of the precoated sand shell by using the injection molding machine comprises the following steps:
s1: the precoated sand of N different granularities is put into N storage sand boxes 1 respectively, namely, the precoated sand of one granularity is put into each storage sand box 1.
S2: the molding die 8 is placed in the molding machine case 7, and the molding die 8 is heated to 150-.
S3: after the sand blasting pressure, time, and the distance from the sand blasting port to the molding die 8 are adjusted, sand blasting is started. The heating device 5 can adopt the prior art such as heating resistance wires.
The sand blasting process is carried out in sequence according to the process that the granularity of the precoated sand is from small to large, and after the precoated sand with small granularity is fully paved on the modeling mold 8, the precoated sand with large granularity is paved and carried out in sequence; shakeout 6 outside the molding die 8 ejected during the sand blasting is stored in the bottom of the storage flask 1.
S4: and after the precoated sand with all the particle sizes is sprayed, stopping heating, and taking out the sand mold 4 after the modeling mold 8 and the precoated sand in the modeling mold are naturally cooled and fixed, so as to obtain the sand mold 4 with the same shape as the modeling mold 8.
Preferably, the sand blasting pressure in the step S3 is controlled to be 2-10 MPa, the sand blasting pressure is realized by changing the pressure of compressed air, and when the pressure is less than 2 MPa, the precoated sand shell layer formed on the surface of the modeling mold by the sprayed precoated sand is loose and not tight, low in strength and inconvenient for subsequent demoulding operation. When the sand blasting pressure is greater than 10 MPa, when the precoated sand reaches the surface of the molding die, the kinetic energy is too large, splashing is easily caused, and a precoated sand shell layer cannot be effectively formed.
Preferably, the sand blasting time in the step S3 is controlled within 10-30S, and when the sand blasting time is less than 10S, the thickness of the formed precoated sand layers with different particle sizes is too thin to meet the quality requirement standards such as sand mold strength. When the sand blasting time is longer than 30 s, the thickness of the formed precoated sand layer is too thick, so that the ineffective consumption of the precoated sand is caused, the production cost is increased, and the quality of the casting is also influenced.
Preferably, the distance from the sand shooting port to the molding mold 8 in the step S3 is 20-50 cm, and when the distance is less than 20 cm, the sand shooting range of each nozzle cannot effectively cover the surface of the molding mold due to too close distance between the sand shooting head and the molding mold, so that a local coated sand shell layer is too thin, even defects occur, and the surface quality of a subsequent casting is affected. When the distance is larger than 50 cm, the overlapping area of the sand shooting ranges of the nozzles is increased, the thickness of a local precoated sand layer is increased, and the uniformity of a precoated sand shell layer is poor.
The raw material of the quartz sand is screened and then subjected to film covering treatment, the raw material is classified according to the granularity interval, the raw material is respectively loaded into different sand storage boxes in a molding machine, and the sand storage boxes are connected with sand shooting heads capable of spraying film covering sand with different granularities. A plurality of sand shooting heads are arranged above the mould and used for simultaneously spraying precoated sand with one granularity, so that the precoated sand is uniformly distributed in the mould. Meanwhile, a plurality of sand shooting heads capable of spraying precoated sand with different granularities are arranged above the die, so that the spraying time is shortened, and the production efficiency of the sand mold is improved.
The method adopts a spray forming machine to sequentially spray the precoated sand with different granularities on the surface of a forming die to obtain the sand mold with the granularity gradient.
1. According to the invention, the fine particle coated quartz sand is adopted on the outermost surface layer of the sand mold, namely the side in contact with the molding mold, so that the fine particle quartz sand removed by screening in the traditional sand mold process is fully utilized while burrs are reduced and the surface finish of a casting is improved, the ineffective consumption of the quartz sand is reduced, and the production cost is reduced.
2. According to the invention, the coarse-particle coated quartz sand is adopted as the outermost layer of the sand mold, so that the air permeability of the sand mold is enhanced, the defects of air holes, insufficient pouring and the like caused by poor air permeability of a casting are avoided, meanwhile, the large-particle quartz sand which is removed by screening in the traditional sand mold process and can cause rough surface of the casting is fully utilized, the ineffective consumption of the quartz sand is reduced, and the production cost is reduced.
3. The middle layer related in the invention can use medium-particle coated sand in the conventional sand mold process, and can also optimize the particle size composition through a numerical simulation model to further decompose the medium-particle coated sand into layers with different particle sizes.
The invention adopts the precoated sand shell type layered injection molding, improves the utilization efficiency of precoated sand with different granularities and simultaneously obtains the sand mold with granularity gradient. Because the surface flatness is high, the inside has a particle size gradient, the air permeability is excellent, and the method plays an important role in reducing surface burrs, avoiding air holes, avoiding insufficient casting and other defects, improving the quality level of castings and reducing the production cost.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (8)
1. A method for laminated injection molding of a precoated sand shell is characterized by comprising the following steps: the method is carried out by adopting the following injection molding machine, and the injection molding machine has the following structure:
comprises a molding machine shell (7) and N sand storage boxes (1), wherein N is more than or equal to 2;
the N sand storage boxes (1) are arranged above the molding machine shell (7), the bottom of each sand storage box (1) is communicated with a conveying pipeline (2), each conveying pipeline (2) penetrates through the top of the molding machine shell (7) and then enters the molding machine shell (7), and the bottom of each conveying pipeline (2) is provided with a sand shooting head (3);
a molding die (8) and a heating device (5) are arranged in the molding machine shell (7), the molding die (8) is placed on the heating device (5), and all the sand shooting heads (3) are positioned right above the molding die (8);
the method for performing the laminated injection molding of the precoated sand shell by using the injection molding machine comprises the following steps:
s1: n kinds of precoated sand with different granularities are respectively put into the N sand storage boxes (1);
s2: placing the molding die (8) into the molding machine shell (7), and heating the molding die (8) to 150-200 ℃ by using the heating device (5);
s3: after the sand blasting pressure, the sand blasting time and the distance from the sand blasting port to the modeling mold (8) are adjusted, sand blasting is started;
the sand blasting process is carried out in sequence according to the process that the granularity of the precoated sand is from small to large, and after the precoated sand with small granularity is fully paved on a layer of the molding die (8), the precoated sand with large granularity is paved and carried out in sequence;
s4: and after the coated sand with all the granularity is sprayed, stopping heating, and taking out the sand mold after the molding mold (8) and the coated sand in the molding mold are naturally cooled and fixed.
2. The method for layered injection molding of precoated sand shell type according to claim 1, characterized in that: each conveying pipeline (2) is connected with a plurality of sand separating pipes respectively, each sand separating pipe is communicated with M sand separating branch pipes, M is larger than or equal to 2, and sand shooting heads (3) are mounted at the bottoms of the sand separating branch pipes.
3. The method for layered injection molding of precoated sand shell type according to claim 2, characterized in that: m sand shooting heads (3) are distributed in a whole-line manner.
4. The method for layered injection molding of a precoated sand shell mold according to any one of claims 1 to 3, wherein: the injection molding machine further comprises a limiting disc (9), the sand separating branch pipes are telescopic pipes, a plurality of limiting holes are formed in the limiting disc (9), the bottoms of all the sand separating branch pipes correspondingly penetrate through the limiting holes one by one, and each sand branch pipe is tightly matched with the limiting holes.
5. The method for layered injection molding of precoated sand shell type according to claim 4, wherein: the injection molding machine further comprises a transmission device, the transmission device comprises a motor (11) and a screw rod (10), an output shaft of the motor (11) is fixedly connected with the screw rod (10), and the screw rod (10) penetrates through the limiting disc (9) and is in threaded connection with the limiting disc (9).
6. The method for layered injection molding of precoated sand shell type according to claim 5, wherein: and controlling the sand blasting pressure in S3 to be 2-10 MPa.
7. The method for layered injection molding of precoated sand shell type according to claim 6, wherein: and in the S3, the distance between the sand shooting port and the mold is 20-50 cm.
8. The method for layered injection molding of precoated sand shell type according to claim 7, wherein: and in the step S3, the sand blasting time is controlled to be 10-30S.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111374903.2A CN114130962A (en) | 2021-11-19 | 2021-11-19 | Laminated injection molding method for precoated sand shell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111374903.2A CN114130962A (en) | 2021-11-19 | 2021-11-19 | Laminated injection molding method for precoated sand shell |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1275455A (en) * | 2000-06-13 | 2000-12-06 | 秦升益 | Composite mould (core) making technology and device thereof |
| CN110576149A (en) * | 2019-10-18 | 2019-12-17 | 彰武县联信铸造硅砂有限公司 | Layered curing composite molding process for precoated sand |
| CN110756745A (en) * | 2018-07-28 | 2020-02-07 | 江阴市惠尔信精密装备股份有限公司 | Casting sand mold forming process |
| CN111801180A (en) * | 2019-03-01 | 2020-10-20 | 苏州明志科技股份有限公司 | Core making machine and control method and system thereof |
| CN216607147U (en) * | 2021-11-19 | 2022-05-27 | 江苏新韦尔新材料有限公司 | Equipment for manufacturing laminated quartz sand multilayer structure shell mold for casting |
-
2021
- 2021-11-19 CN CN202111374903.2A patent/CN114130962A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1275455A (en) * | 2000-06-13 | 2000-12-06 | 秦升益 | Composite mould (core) making technology and device thereof |
| CN110756745A (en) * | 2018-07-28 | 2020-02-07 | 江阴市惠尔信精密装备股份有限公司 | Casting sand mold forming process |
| CN111801180A (en) * | 2019-03-01 | 2020-10-20 | 苏州明志科技股份有限公司 | Core making machine and control method and system thereof |
| CN110576149A (en) * | 2019-10-18 | 2019-12-17 | 彰武县联信铸造硅砂有限公司 | Layered curing composite molding process for precoated sand |
| CN216607147U (en) * | 2021-11-19 | 2022-05-27 | 江苏新韦尔新材料有限公司 | Equipment for manufacturing laminated quartz sand multilayer structure shell mold for casting |
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