CN113070458A - Preparation method of die for die casting, die, preparation method of cover plate and filter - Google Patents
Preparation method of die for die casting, die, preparation method of cover plate and filter Download PDFInfo
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- CN113070458A CN113070458A CN202010010927.9A CN202010010927A CN113070458A CN 113070458 A CN113070458 A CN 113070458A CN 202010010927 A CN202010010927 A CN 202010010927A CN 113070458 A CN113070458 A CN 113070458A
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- die
- casting
- cover plate
- roughness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2254—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies having screw-threaded die walls
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- 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
- Y02P10/20—Recycling
Abstract
The application provides a preparation method of a die for die casting, a die, a preparation method of a cover plate and a filter, wherein the preparation method comprises the step of processing the inner surface of the die for die casting by utilizing a line drying process so that the roughness of the inner surface is more than or equal to 8. Through the mode, the roughness of the inner surface of the die for die-casting can be improved, so that the die-casting forming of the large ultrathin-wall cover plate type casting is realized.
Description
Technical Field
The application relates to the technical field of dies, in particular to a preparation method of a die for die casting, a die, a preparation method of a cover plate and a filter.
Background
At present, when a cover plate (such as an aluminum alloy cover plate) is prepared by a die casting process, due to the fact that the wettability of molten metal on the inner surface of a die for die casting is poor, the spreadability of the molten metal in a cavity of the die is poor, and defects such as poor filling are easily generated at a thin seam part, the forming of large-scale ultra-thin wall cover plate type die castings cannot be met.
Disclosure of Invention
The technical problem mainly solved by the application is to provide a preparation method of a die for die casting, a die, a preparation method of a cover plate and a filter, which can improve the roughness of the inner surface of the die for die casting so as to realize the die casting forming of a large ultrathin-wall cover plate casting.
In order to solve the technical problem, the application adopts a technical scheme that: provided is a method for producing a die for die casting, the method comprising: and treating the inner surface of the die-casting die by using a line-drying process so that the roughness of the inner surface is more than or equal to 8.
Wherein the roughness of the inner surface is not less than 8 and not more than 10.
Wherein, the processing of the inner surface of the die-casting die by utilizing a line drying process comprises the following steps: arranging a printing plate on the inner surface, wherein the etching depth of the printing plate is more than or equal to 50 um; spraying anti-etching ink from one side of the printing plate to the inner surface by using a spray pattern gun; chemically etching the inner surface provided with the etch-resistant ink so that the inner surface forms a rugged pattern; removing the etch-resistant ink from the inner surface.
Wherein the type of the printing plate comprises MT 11030.
In order to solve the above technical problem, another technical solution adopted by the present application is: provided is a die-casting die, wherein the roughness of the inner surface of the die-casting die is not less than 8.
Wherein the roughness of the inner surface is not less than 8 and not more than 10.
In order to solve the above technical problem, another technical solution adopted by the present application is: provided is a method of manufacturing a cover plate, the method including: the cover plate is formed by die casting using the die-casting die according to any of the above embodiments, wherein the roughness of the surface of the cover plate in contact with the inner surface of the die-casting die is 8 or more.
Wherein a surface of the cover plate that contacts the inner surface of the die-casting mold has a roughness of 8 or more and 10 or less.
In order to solve the above technical problem, another technical solution adopted by the present application is: there is provided a 5G filter comprising a cover plate formed by the method of any one of the embodiments described above.
The beneficial effect of this application is: according to the preparation method of the die-casting die, the inner surface of the die-casting die is treated by adopting a line drying process, so that the roughness of the inner surface of the die-casting die is more than or equal to 8. When the method is applied to a die casting process, the roughness of the inner surface of a die for die casting, which is in contact with molten metal, is more than or equal to 8, the wetting angle of the molten metal on the inner surface of the die for die casting is smaller, and further the spreadability of the molten metal on the inner surface of the die for die casting is better, so that the fluidity of the molten metal in a thin seam in a die cavity of the die is improved, and the production of large-scale ultra-thin-wall cover plate type die castings is possible.
For example, die casting of large ultra thin wall covers with wall thickness of 1.5mm, length 492mm and width 634mm has been successfully achieved. The wall thickness of the large ultrathin-wall cover plate of the industry standard is 3.3mm, the wall thickness can be reduced to 1.5mm by using the technical scheme provided by the application, and the weight and the material can be reduced by about 1515 g.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:
FIG. 1 is a schematic flow chart illustrating an embodiment of a method for manufacturing a die for die casting according to the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of spreading molten metal on a die surface for die casting;
FIG. 3 is a schematic flowchart illustrating an embodiment of step S101 in FIG. 1;
FIG. 4 is a schematic structural diagram of an embodiment of the die for die casting according to the present application;
fig. 5 is a schematic flow chart illustrating an embodiment of a method for manufacturing a cover plate according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a schematic flow chart of an embodiment of a method for manufacturing a die for die casting according to the present application, where the method includes S101: and treating the inner surface of the die casting die by a line drying process so that the roughness of the inner surface is more than or equal to 8.
The surface roughness in step S101 refers to the small pitch and the unevenness of the fine valleys. Die casting is a casting forming process in which high-temperature molten metal is filled in a cavity of a die for die casting at high speed and is solidified under high pressure.
When the die-casting die is applied to a die-casting process, the roughness of the inner surface of the die-casting die, which is in contact with molten metal, is more than or equal to 8, the wetting angle of the molten metal on the inner surface of the die-casting die with certain roughness is small (as shown in figure 2), and the wetting angle theta can be smaller than 90 degrees, so that the spreadability of the molten metal on the inner surface of the die-casting die is good, the mobility of the molten metal in a thin seam in a die cavity of the die is improved, the production of large ultrathin-wall cover plate type die-casting parts is possible, the forming quality of the cover plate type die-casting parts is good, and the die-casting defects such as cold shut, layering, peeling, cracks and the like. For example, the die casting of large ultra-thin wall cover plate type die castings with the wall thickness of 1.5mm, the length of 492mm and the width of 634mm is successfully realized, and the die casting yield is up to 98%. The wall thickness of the large ultrathin-wall cover plate of the industry standard is 3.3mm, the wall thickness can be reduced to 1.5mm by using the technical scheme provided by the application, and the weight and the material can be reduced by about 1515 g.
The roughness of the inner surface of the die-casting mold is preferably 8 to 10, for example, 8.5, 9, 9.5, and the like. The die for die casting meeting the roughness range has the advantages and good appearance effect.
In addition, the texture-printing process in step S101 is a process for forming various patterns (for example, a matte surface, an etching line, etc.) on the surface of the metal product by chemical infiltration. The mode and the process for forming certain roughness on the inner surface of the die for die casting by utilizing the line drying process are mature and easy to realize. Of course, in other embodiments, the pattern-coating process may be combined with other processes, such as a sand blasting process, so long as a certain degree of roughness is generated on the inner surface of the die casting mold.
In an application scenario, please refer to fig. 3, and fig. 3 is a flowchart illustrating an embodiment of step S101 in fig. 1. The step of processing the inner surface of the die-casting die by using the line drying process specifically comprises the following steps:
s201: and arranging the pattern printing plate on the inner surface, wherein the etching depth of the pattern printing plate is more than or equal to 50 um.
Specifically, in this embodiment, before the step S201, the preparation method provided by the present application further includes:
A. washing the mold: the special mould cleaning agent is adopted to clean oil stains and impurities on the surface of the mould, and the surface of the mould is not scratched or provided with sand holes.
B. Die bonding: the method comprises the following steps of sticking a special adhesive tape on the surface without the pattern drying, usually sticking at least three layers of adhesive tapes, sealing the boundary of the pattern drying with wax after sticking, and cleaning the region to be subjected to pattern drying again.
C. Chemical examination: soaking the mold with the adhesive plaster in a chemical agent, which may include nitric acid, sulfuric acid, and copper sulfate, for several seconds, the surface of the pattern to be exposed, which is not adhered with the adhesive plaster, will be chemically corroded, and the surface will be black. Through the chemical inspection, the operator can roughly judge visually whether the mold sticking effect in step B is good or not and whether the corrosive effect of the chemical agent is acceptable or not. If the adhesive tape is found to fall off through the step C, namely the surface of the area which does not need to be subjected to line drying is black, the step B needs to be carried out again; if the area to be sunned with the pattern is not corroded to be black through the step C, the chemical agent needs to be reconfigured in the step C.
D. Sand washing: and uniformly spraying sand grains on the corroded surface of the mold by using a spray gun, removing a black oxide layer on the surface of the mold, and washing the surface of the mold with the sand to be silvery white.
The etching depth of the dry etching plate in step S201 may be 50um, 63um, 69um, 76um, etc., and the etching depth may be controlled such that the roughness formed on the inner surface of the die-casting mold in the subsequent step is 8 or more. Preferably, the type of the printing plate comprises MT11030, the printing plate of the type is easy to obtain, and the roughness formed by the printing plate of the type meets the requirement. Of course, in other embodiments, the type of the printing plate may be other, and the present application does not limit this.
In this embodiment, the step S201 specifically includes: etching a standard pattern plate by using a film, then evenly waxing the pattern plate, then transferring the patterns on a special film by using a rolling machine to manufacture wax paper, and sticking the wax paper on the inner surface of a die-casting die after sand washing according to requirements, wherein the wax paper can be called as a pattern drying plate.
S202: and spraying the etching-resistant ink from one side of the printing plate to the inner surface by using a spray gun.
Specifically, before step S202, the preparation method provided by the present application further includes: the anti-etching ink is prepared, and mainly the size of particles in the anti-etching ink is prepared. In step S202, air drying may be performed after the pattern is sprayed by the pattern spraying gun.
S203: the inner surface provided with the etching-resistant ink is chemically etched so that the inner surface forms a rugged pattern.
Specifically, the step S203 includes: the die-casting mold with good lines sprayed in step S202 is soaked in the prepared chemical agent, and the chemical agent can corrode the bright part of the die-casting mold, so that the bright part forms a black oxide layer. The chemical agent may include nitric acid, sulfuric acid, copper sulfate, etc.
S204: and removing the etching-resistant ink on the inner surface.
Specifically, the step S204 includes: and uniformly spraying the mixture on the inner surface of the die for die casting after line drying by using a spray gun, removing the etching-resistant ink and the black oxide layer, and enabling the inner surface of the die after sand washing to be silvery white.
Of course, in other embodiments, other patterning processes may be used, and the present application is not limited thereto, for example, laser patterning, etc.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an embodiment of a die for die casting according to the present application. The die for die casting 10 is generally composed of a fixed die 100 and a movable die 102, and an area formed when the fixed die 100 and the movable die 102 are closed may be referred to as a cavity. The fixed die 100 is fixed to a fixed die base plate on the side of a pressure chamber of a die casting machine, and is a portion where molten metal starts to enter a die cavity of the die casting die 10, and a sprue may be provided in the fixed die 100 to be directly connected to a nozzle or the pressure chamber of the die casting machine. The movable die 102 is fixed on a movable die base plate of the die casting machine and moves leftwards and rightwards along with the movable die base plate to be separated from and folded with the fixed die 100. In the present embodiment, the roughness of the inner surface 104 of the die-casting die 10 is 8 or more, and the inner surface 104 may be a side surface of the fixed die 100 facing the movable die 102, and/or a side surface of the movable die 102 facing the fixed die 100.
When the die-casting die 10 is applied to a die-casting process, the roughness of the inner surface 104 of the die-casting die 10 in contact with molten metal is more than or equal to 8, the wetting angle of the molten metal on the inner surface 104 of the die-casting die 10 with certain roughness is small (as shown in fig. 2), and the wetting angle theta can be smaller than 90 degrees, so that the spreadability of the molten metal on the inner surface 104 of the die-casting die 10 is good, the mobility of the molten metal in a thin seam in a die cavity of the die is improved, the production of large-scale ultra-thin wall cover plate type die castings is possible, the forming quality of the cover plate type die castings is good, and defects such as cold shut, delamination, peeling, cracks and the like are few. For example, the die casting of large ultra-thin wall cover plate type die castings with the wall thickness of 1.5mm, the length of 492mm and the width of 634mm is successfully realized, and the die casting yield is up to 98%. The wall thickness of the large ultrathin-wall cover plate of the industry standard is 3.3mm, the wall thickness can be reduced to 1.5mm by using the technical scheme provided by the application, and the weight and the material can be reduced by about 1515 g.
Preferably, the roughness of the inner surface 104 is equal to or greater than 8 and equal to or less than 10. E.g., 8.5, 9, 9.5, etc. The die for die casting meeting the roughness range has the advantages and good appearance effect.
In addition, the roughness of the inner surface 104 in the above embodiments may be processed in any of the above embodiments, and is not described herein again. Preferably, the pattern on the inner surface 104 is the same as the pattern of a MT11030 pattern plate.
Referring to fig. 5, fig. 5 is a schematic flow chart illustrating an embodiment of a method for manufacturing a cover plate according to the present application, the method including S301: and die-casting the cover plate by using a die-casting die, wherein the roughness of the surface of the cover plate, which is in contact with the inner surface of the die-casting die, is more than or equal to 8. In this embodiment, the structure of the die for die casting may refer to any of the above embodiments, and is not described herein again.
The roughness of the inner surface of the die-casting die contacted with the molten metal is more than or equal to 8, the wetting angle of the molten metal on the inner surface of the die-casting die with certain roughness is smaller (as shown in figure 2), the wetting angle theta can be less than 90 degrees, and further the spreadability of the molten metal on the inner surface of the die-casting die is better, so that the fluidity of the molten metal in a thin seam in a die cavity of the die is improved, the production of large-scale ultra-thin wall cover plate type die castings is possible, the forming quality of the cover plate type die castings is better, and the die-casting defects such as cold shut, layering, peeling, cracks and the like are fewer. For example, the die casting of large ultra-thin wall cover plate type die castings with the wall thickness of 1.5mm, the length of 492mm and the width of 634mm is successfully realized, and the die casting yield is up to 98%.
Preferably, the roughness of the surface of the cover plate in contact with the inner surface of the die-casting die is 8 or more and 10 or less, for example, 8.5, 9, 9.5, or the like. The cover plate meeting the roughness range has a good appearance effect.
Preferably, the shape of the pattern on the surface of the cover plate formed by the preparation method is the same as the shape of a pattern plate with the model number of MT 11030.
The application also provides a 5G filter, which comprises a cover plate, wherein the cover plate can be formed by adopting the cover plate preparation method provided by any embodiment.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (9)
1. A method for manufacturing a die for die casting, the method comprising:
and treating the inner surface of the die-casting die by using a line-drying process so that the roughness of the inner surface is more than or equal to 8.
2. The production method according to claim 1,
the roughness of the inner surface is not less than 8 and not more than 10.
3. The manufacturing method according to claim 1, wherein the treating the inner surface of the die-casting mold by a tanning process includes:
arranging a printing plate on the inner surface, wherein the etching depth of the printing plate is more than or equal to 50 um;
spraying anti-etching ink from one side of the printing plate to the inner surface by using a spray pattern gun;
chemically etching the inner surface provided with the etch-resistant ink so that the inner surface forms a rugged pattern;
removing the etch-resistant ink from the inner surface.
4. The production method according to claim 3,
the type of the printing plate comprises MT 11030.
5. A die for die casting, characterized in that,
the roughness of the inner surface of the die casting die is more than or equal to 8.
6. The die for die casting according to claim 5,
the roughness of the inner surface is not less than 8 and not more than 10.
7. A method of making a cover plate, the method comprising:
the cover plate is die-cast using the die-casting die according to any one of claims 5 to 6, wherein a surface of the cover plate that contacts the inner surface of the die-casting die has a roughness of 8 or more.
8. The production method according to claim 7,
the roughness of the surface of the cover plate in contact with the inner surface of the die-casting die is not less than 8 and not more than 10.
9. A5G filter, comprising a cover plate formed by the manufacturing method of any one of claims 7 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010010927.9A CN113070458B (en) | 2020-01-06 | 2020-01-06 | Preparation method of die for die casting, die, preparation method of cover plate and filter |
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| CN202010010927.9A CN113070458B (en) | 2020-01-06 | 2020-01-06 | Preparation method of die for die casting, die, preparation method of cover plate and filter |
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| CN113070458A true CN113070458A (en) | 2021-07-06 |
| CN113070458B CN113070458B (en) | 2023-04-07 |
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| Publication number | Publication date |
|---|---|
| CN113070458B (en) | 2023-04-07 |
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