CN115283935B - Method for repairing texture on surface layer of die - Google Patents
Method for repairing texture on surface layer of die Download PDFInfo
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- CN115283935B CN115283935B CN202210785108.0A CN202210785108A CN115283935B CN 115283935 B CN115283935 B CN 115283935B CN 202210785108 A CN202210785108 A CN 202210785108A CN 115283935 B CN115283935 B CN 115283935B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
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Abstract
The invention discloses a method for repairing texture on a surface layer of a die, which comprises the following steps: in the mould cavity surface with large tracts of land texture damage, adhesion protection film to protect the region that need not to repair, then spout the photoresist in the damage region, polish and until the plane of unifying height appears at line unit top, then adopt the liquid medicine to carry out oxidation treatment to line unit top back, the sand blast washs the photoresist, finally get and the texture peak distribution the same line paper subsides of line unit on the line unit, adopt the liquid medicine to carry out oxidation treatment to line unit, until the texture peak height of line unit resumes the height before not damaging, whole repair process need not to carry out the face that falls and polishes the processing to the whole face of mould, has promoted repair efficiency, and to the texture defect that the area is slightly bigger, only operate one round of paste line paper operation, saved the processing cost because of repetition treatment leads to, still greatly reduced the dependence of the whole face equipment that falls of mould.
Description
Technical Field
The application relates to the technical field of mold repair, in particular to a mold surface texture repair method.
Background
In the traditional processing process of the surface texture of the injection molding die, the characteristics of the surface texture are extremely difficult to control, and texture defects are easy to generate; in the process of transporting and assembling the mould, the surface texture is also easy to be damaged correspondingly.
When large-area defects appear on surface texture, the existing manual texture repair by repairing workpieces is only suitable for local small-range or local bruise defect texture, texture connection cannot be achieved on texture defects with larger areas and appearance texture consistency is achieved, and when the surface texture defects with larger areas are repaired, CNC processing of the die is required, integral polishing is required, three rounds of texture paper pasting and repeated liquid medicine oxidation are required to finish repair, and the whole process is long, operation is complex and efficiency is low.
Disclosure of Invention
Aiming at the defects in the prior art, the application provides a method for repairing texture on a surface layer of a die, so as to solve the problems of long period and low efficiency when the texture defect with a slightly large area is needed in the prior art.
The above object of the present invention is mainly achieved by the following technical solutions:
a method for repairing texture of a surface layer of a die comprises the following steps:
providing a mould, and confirming that the provided mould has large-area surface texture damage;
adhering a protective film to the non-repair area in the provided mold cavity surface;
spraying photoresist on a damaged area in the provided die cavity surface;
polishing the grain units of the die until a plane with uniform height appears at the top of the grain units;
oxidizing the grain unit until a tip appears at the top of the grain unit;
cleaning the photoresist;
attaching the texture paper with the same texture peak distribution as the texture units to the texture units;
and oxidizing the texture unit attached with the texture paper until the height of the texture peak of the texture unit meets the requirement.
Further, the spraying thickness of the photoresist is 20-30 μm.
Further, the photoresist is prepared by dissolving 0.8-1.2kg shellac in 400-500 ml alcohol.
Further, the liquid medicine is a strong acid liquid medicine to corrode the texture unit.
Further, the temperature of the liquid medicine oxidation treatment process is 8-12 ℃.
Further, after finishing the texture repair of the damaged area, sand blasting is carried out to adjust the surface glossiness of the die.
Further, the sand blasting for adjusting the glossiness of the surface of the die is performed by brown corundum with 220 meshes.
Further, the photoresist was cleaned by sand blasting, and 3:2 parts by weight of the mixture was subjected to sand blasting.
Further, the coverage area of the texture paper is identical to the distribution of texture peaks of the texture units, so that the uncovered area of the texture paper and the liquid medicine are subjected to oxidation reaction.
Further, when the surface texture damage of the mold is greater than 1 square centimeter, the mold is a mold having a large area of surface texture damage.
Compared with the prior art, the invention has the advantages that:
according to the invention, a protective film is adhered in a mold cavity surface with large-area surface texture damage to protect an area needing repair, photoresist with the thickness of H2 is sprayed in the damaged area, polishing is carried out until a plane with uniform height appears at the top of a grain unit, the texture peak height of the grain unit is H3, then, liquid medicine is adopted to carry out oxidation treatment on the grain unit until the top of the grain unit has a tip, then, sand blasting is carried out to clean the photoresist, finally, grain paper with the same distribution as the texture peak of the grain unit is adopted to be attached to the grain unit, and liquid medicine is adopted to carry out oxidation treatment on the grain unit until the texture peak height of the grain unit is H1, thus finishing the texture repair of the damaged area.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly explain the drawings needed in the description of the embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart of a method for repairing texture on a surface layer of a mold according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a broken texture portion of a mold surface layer according to an embodiment of the present disclosure;
FIG. 3 is a schematic cross-sectional view of a photoresist sprayed according to an embodiment of the present disclosure;
FIG. 4 is a schematic cross-sectional view of a polished surface according to an embodiment of the present disclosure;
FIG. 5 is a schematic cross-sectional view of a liquid medicine according to an embodiment of the present application after treatment;
FIG. 6 is a schematic cross-sectional view of a spray-cleaned article according to an embodiment of the present application;
FIG. 7 is a schematic cross-sectional view of an oxidized process according to an embodiment of the present application;
in the figure: 1. a texture unit; 2. and (5) photosensitive glue.
Detailed Description
The invention is further described with reference to the drawings and specific examples. It should be noted that the description of these examples is for aiding in understanding the present invention, but is not intended to limit the present invention. Specific structural and functional details disclosed herein are merely representative of example embodiments of the invention. This invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
As shown in fig. 1-7, a method for repairing texture of a surface layer of a mold comprises the following steps:
as shown in fig. 2, a mold having a large-area skin texture damage is taken, the texture valley position of the mold skin texture is indicated by L1 in the sectional views of fig. 2 to 7, and the texture peak position of the mold skin texture is indicated by L2 in the sectional views of fig. 2 to 7.
The protective film is adhered to the non-repairing area in the mold cavity surface, the protective film is adhered to the mold cavity surface, after the moving carrier of the protective film is removed, the moving carrier can be directly removed, the protective film protects the area which is not required to be repaired, the protective film is adhered to the non-repairing area in a gelatinous mode, secondary damage on the non-repairing area caused by repairing operation of the damaged area is avoided, the area which needs to be repaired comprises damaged grain units and a part of undamaged grain units around the damaged grain units, and the undamaged grain units provide repairing reference of grains so that consistency exists between the repaired grain units and the repaired grain units.
Specifically, the main components of the protective film comprise rubber copolymer, a film forming agent and color paste, after the protective film is prepared, the protective film can be adhered to a non-repaired area in a brushing or spraying mode, and after the protective film is solidified, the protection of the non-repaired area is formed, so that unnecessary errors in the matching of a die are avoided.
As shown in fig. 3, the damaged area in the cavity surface of the mold is sprayed with photoresist with thickness of H2, which can clearly distinguish the surface of the grain unit by an operator, and in order to improve the obvious degree of photoresist, a certain amount of toner can be added during the preparation of photoresist, and the color of the toner can be obviously compared with that of the material of the mold.
As shown in fig. 4, polishing is performed until a plane with uniform height appears at the top of the grain unit, and the grain peak height of the grain unit is H3, when polishing the grain unit, polishing is performed on damaged grain units and undamaged grain units around the grain unit, and after the grain units in the polishing area are maintained to be polished, the grain units can be maintained at the same position height, namely, the distance between the grain valley and the grain peak is H3.
As shown in fig. 5, the grain unit is oxidized by using the chemical liquid until the top of the grain unit is pointed, the chemical liquid can perform oxidation reaction with the mold main body and corrode the mold main body, the whole polishing surface of the mold can be immersed into the chemical liquid during operation, that is, the polished grain unit starts to corrode from the polishing surface, the chemical liquid starts to corrode from the edge part of the polishing area on the grain unit, two side edge components of the grain unit are corroded by the chemical liquid to form the grain unit with pointed end, and the elastic photoresist is continuously attached to the side wall of the grain unit after the edge of the grain unit is corroded, and in the process of adhering the deformation of the photoresist, the grain unit gradually forms a smooth inclined section from bottom to top.
The main components of the liquid medicine are concentrated sulfuric acid and silver nitrate, and the purpose is to react and replace iron corrosion after contacting with the grain unit, in particularThe reaction chemical formula is as follows: 2Fe+6H 2 SO 4 (concentrate) = = = Δ= Fe 2 (SO 4 ) 3 +3SO 2 ↑+6H 2 O；Fe+2AgNO 3 ＝2Ag+Fe(NO 3 ) 2 。
As shown in fig. 6, the photoresist is sandblasted and cleaned, and compressed air mixed with sand or abrasive grains is sprayed to the area on the mold, to clean the photoresist on the grain unit and directly expose the whole grain unit.
As shown in fig. 7, the texture units are oxidized by using the liquid medicine until the height of the texture peak of the texture unit is H1, and the area where all the texture units are located on the mold is oxidized by the liquid medicine, so that the texture valley of the texture unit is wholly lowered by a certain distance, at this time, the height of the texture unit on the surface layer of the mold where no damage occurs is the same as the height of the texture unit on the surface layer of the mold where no damage occurs, and the shape of the texture unit reaches the design requirement, thereby finishing the texture repair of the damaged area.
The working principle of the embodiment is as follows: in the mould die cavity face that has large tracts of land surface texture damage, adhesion protection film to the protection need not prosthetic region, then spout the photoresist of thickness for H2 at the damage region, polish and appear unifying high plane until line unit top, and line unit's texture peak height is H3, then adopt liquid medicine to carry out oxidation treatment to line unit, after the point appears at line unit top, the sandblast washs the photoresist, get at last with line unit's texture peak distribution the same line paper is attached to line unit, adopt liquid medicine to carry out oxidation treatment to line unit, until line unit's texture peak height is H1, accomplish the texture restoration of damage region, whole repair process need not to carry out the face that falls and polishes the processing wholly to the mould, has promoted repair efficiency to the texture defect that the area is slightly bigger, only operates one round of line paper just can realize the restoration, has saved the processing cost of repetitive treatment and has saved the reliance of the whole face equipment of falling to the mould.
Further, on the basis of the above embodiment, the spraying thickness of the photoresist is 20 μm-30 μm, and the laminated structure formed by the photoresist has a certain deformation capability and can be attached to the grain unit by the deformation restoring force while maintaining the protection function of the photoresist.
Further, on the basis of the embodiment, the photoresist is prepared by dissolving 0.8-1.2kg of shellac in every 400ml-500ml of alcohol, and the alcohol can be medical alcohol with the concentration of 95%, wherein the shellac is generally purple natural resin secreted by shellac after shellac absorbs host tree sap and mainly contains shellac resin, shellac wax and shellac pigment.
Further, on the basis of the above embodiment, the liquid medicine may be set as a strong acid liquid medicine of other components to corrode the grain unit.
Further, on the basis of the above embodiment, the temperature of the oxidation treatment process of the liquid medicine is 8-12 ℃, and specifically, the corrosion temperature of 10 ℃ can be selected to improve the corrosion efficiency.
Further, on the basis of the above embodiment, after finishing the texture repair of the damaged area, sand blasting is performed to adjust the surface glossiness of the mold, and since the side wall of the texture unit is corroded to a certain extent, the side wall is also used for being attached to the outer surface of the production workpiece, the service life of the mold can be prolonged by adjusting the inertial thickness of the surface of the mold.
Further, on the basis of the above embodiment, the blasting is performed by brown corundum with a specification of 220 mesh when the glossiness of the surface of the mold is adjusted, and the blasting is performed by glass beads with a specification of 150 mesh and brown corundum with a specification of 220 mesh when the photoresist is cleaned by 3:2 parts by weight of the mixture.
Further, on the basis of the above embodiment, H1 is greater than H3, and H1 is greater than H2.
Further, on the basis of the above embodiment, the coverage area of the textured paper is the same as the distribution of texture peaks of the textured units, so that the uncovered area of the textured paper and the liquid medicine undergo oxidation reaction.
And adhering the texture paper with the same distribution of texture peaks of the texture units on the texture units, wherein the texture paper with the same texture as the surface texture of the mold is adopted in order to keep the consistency of the texture units with original texture, and further, when the local part of the surface texture is damaged, the texture paper and the texture of the surface layer of the mold still have a superposed part, and the texture part which can be superposed is used as a positioning part, so that the texture part is synchronous and corresponds to the texture to be repaired on the texture paper on the damaged texture.
Further, on the basis of the above embodiment, when the surface texture damage of the mold is greater than 1 square centimeter, the mold with large surface texture damage is a repair method adopted when the surface texture damage of the mold is not greater than 1 square centimeter, and the application is not unfolded.
During actual use, the following specific operation steps are carried out:
step 1: providing a mould with damaged surface texture, judging and selecting a mould with the surface texture damage larger than 1 square centimeter and the texture peak height of the texture unit being H1, moving the mould to a repairing area, and cleaning the surface of the mould;
step 2: adhering a protective film on the non-repair area in the cavity surface of the die;
step 3: dissolving 1.2kg of shellac in 500ml of 95% medical alcohol to prepare photoresist, adding blue toner into the photoresist, uniformly mixing, and spraying the photoresist on a damaged area in a mold cavity surface with the thickness of 30 mu m;
step 4: polishing the tops of the grain units by a polisher until the distances between grain peaks and grain valleys of the polished grain units are 2mm;
step 5: oxidizing the texture unit by adopting liquid medicine at the temperature of 10 ℃ until the top of the texture unit is pointed;
step 6: glass beads with the specification of 150 meshes and brown corundum with the specification of 220 meshes are adopted for 3:2, carrying out sand blasting cleaning on the photoresist by using the mixture in parts by weight;
step 7: attaching the texture paper with the same distribution of texture peaks of the texture units to the texture units;
step 8: oxidizing the texture unit by adopting liquid medicine until the height of the texture peak of the texture unit is restored to H1;
step 9: adopting brown corundum with 220 meshes to carry out sand blasting to adjust the surface glossiness of the die to the design requirement standard, and finishing the texture repair of the damaged area;
step 10: and removing the repaired die from the treatment position and packaging.
It should be appreciated that the terms first, second, etc. are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. Although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.
It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: the terms "/and" herein describe another associative object relationship, indicating that there may be two relationships, e.g., a/and B, may indicate that: the character "/" herein generally indicates that the associated object is an "or" relationship.
It should be understood that in the description of the present invention, the terms "upper", "vertical", "inner", "outer", etc. indicate an orientation or a positional relationship in which the disclosed product is conventionally put in use, or an orientation or a positional relationship that is conventionally understood by those skilled in the art, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates to the contrary. It will be further understood that the terms "comprises," "comprising," "includes," "including" and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, and do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and/or groups thereof.
In the following description, specific details are provided to provide a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. In other embodiments, well-known processes, structures, and techniques may not be shown in unnecessary detail in order to avoid obscuring the example embodiments.
The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The method for repairing the texture of the surface layer of the die is characterized by comprising the following steps of:
providing a mould, and confirming that the provided mould has large-area surface texture damage;
adhering a protective film to the non-repair area in the provided mold cavity surface;
spraying photoresist on a damaged area in the provided die cavity surface;
polishing the grain units of the die until a plane with uniform height appears at the top of the grain units;
oxidizing the texture unit by adopting liquid medicine until the top of the texture unit is pointed;
cleaning the photoresist;
attaching the texture paper with the same texture peak distribution as the texture units to the texture units;
and oxidizing the texture unit attached with the texture paper until the height of the texture peak of the texture unit meets the requirement.
2. The method for repairing texture of a surface layer of a mold according to claim 1, wherein: the spraying thickness of the photoresist is 20-30 mu m.
3. A method of repairing a texture in a mold skin as claimed in claim 2, wherein: the photoresist is prepared by dissolving 0.8-1.2kg shellac in 400-500 ml ethanol.
4. The method for repairing texture of a surface layer of a mold according to claim 1, wherein: the liquid medicine is strong acid liquid medicine to corrode the grain unit.
5. The method for repairing texture of a surface layer of a mold according to claim 4, wherein: the temperature of the liquid medicine oxidation treatment process is 8-12 ℃.
6. The method for repairing texture of a surface layer of a mold according to claim 1, wherein: and after finishing the texture repair of the damaged area, carrying out sand blasting to adjust the surface glossiness of the die.
7. The method for repairing texture of a surface layer of a mold according to claim 6, wherein: the sand blasting is carried out by brown corundum with 220 meshes in specification when the glossiness of the surface of the die is regulated.
8. The method for repairing texture of a surface layer of a mold according to claim 1, wherein: the photoresist is cleaned by sand blasting, and glass beads with the specification of 150 meshes and brown corundum with the specification of 220 meshes are adopted for cleaning the photoresist by 3:2 parts by weight of the mixture was subjected to sand blasting.
9. The method for repairing texture of a surface layer of a mold according to claim 1, wherein: the coverage area of the texture paper is identical to the distribution of texture peaks of the texture units, so that the uncovered area of the texture paper and the liquid medicine are subjected to oxidation reaction.
10. The method for repairing texture of a surface layer of a mold according to claim 1, wherein: when the surface texture damage of the mold is greater than 1 square centimeter, the mold is a mold with large surface texture damage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210785108.0A CN115283935B (en) | 2022-06-28 | 2022-06-28 | Method for repairing texture on surface layer of die |
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| CN202210785108.0A CN115283935B (en) | 2022-06-28 | 2022-06-28 | Method for repairing texture on surface layer of die |
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| CN115283935B true CN115283935B (en) | 2023-04-25 |
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| CN111760771A (en) * | 2020-07-06 | 2020-10-13 | 爱仕达股份有限公司 | Processing method of non-stick pan with concave grains |
| CN114182248A (en) * | 2021-10-28 | 2022-03-15 | 国营芜湖机械厂 | Cold spraying repair and protection method for corrosion of hole bottom of flange plate |
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| JPH07237225A (en) * | 1994-02-28 | 1995-09-12 | Mitsubishi Electric Corp | Aluminum mold and its repairing method |
| WO1996031318A1 (en) * | 1995-04-07 | 1996-10-10 | Faircove Systems | A method and apparatus for texturing surfaces, and articles produced thereby |
| US5723078A (en) * | 1996-05-24 | 1998-03-03 | General Electric Company | Method for repairing a thermal barrier coating |
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| CN115283935A (en) | 2022-11-04 |
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