CN115283935A - Method for repairing surface texture of mold - Google Patents
Method for repairing surface texture of mold Download PDFInfo
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- CN115283935A CN115283935A CN202210785108.0A CN202210785108A CN115283935A CN 115283935 A CN115283935 A CN 115283935A CN 202210785108 A CN202210785108 A CN 202210785108A CN 115283935 A CN115283935 A CN 115283935A
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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 surface texture of a mold, which comprises the following steps: in the die cavity surface with large-area surface texture damage, a protective film is adhered to protect an area which does not need to be repaired, photosensitive glue is sprayed on the damaged area, the area is polished until a plane with uniform height appears at the top of a texture unit, then chemical liquid is used for carrying out oxidation treatment on the texture unit, the photosensitive glue is cleaned by sandblasting until a tip appears at the top of the texture unit, finally, the texture paper which is the same as the texture peak distribution of the texture unit is attached to the texture unit, the chemical liquid is used for carrying out oxidation treatment on the texture unit until the texture peak height of the texture unit is recovered to the height before damage, the whole repairing process does not need to carry out surface reduction and polishing treatment on the die, the repairing efficiency is improved, and the die cavity surface defect with larger area is only subjected to one round of texture paper attaching operation, the processing cost caused by repeated treatment is saved, and the dependence on the whole surface reduction equipment of the die is greatly reduced.
Description
Technical Field
The application relates to the technical field of die repair, in particular to a method for repairing surface textures of a die.
Background
In the traditional processing process of surface textures of an injection molding part mold, the characteristics of surface textures are extremely difficult to control, and texture defects are easy to generate; and corresponding damage to the surface texture is easily caused in the process of transporting and assembling the mould.
When large tracts of land defect appears in the surface layer texture, the texture restoration that adopts at present to carry out through repairing the work piece is only fit for the defect texture of local minizone or local damage, can't realize linking up of texture and reach the outward appearance texture uniformity to the texture defect that area is slightly big, and when the tradition was carried out repairing treatment to surface layer texture defect that area is slightly big, need CNC mould processing whole fall the face, whole polishing, the tricycle pastes the texture paper and the liquid medicine oxidation completion restoration that relapses, whole cycle length, the operation is complicated, inefficiency.
Disclosure of Invention
Aiming at the defects in the prior art, the application provides a method for repairing the surface texture of a mold, which aims to solve the problems of long period and low efficiency when the defect of the texture with a slightly large area needs to be repaired in the prior art.
The above purpose of the invention is mainly realized by the following technical scheme:
a method for repairing the surface texture of a mould comprises the following steps:
providing a mold, and confirming that the provided mold has large-area surface texture damage;
adhering a protective film to a non-repair area in the provided mould cavity surface;
spraying photosensitive glue on the damaged area in the provided mould cavity surface;
polishing the grain units of the die until the tops of the grain units form a plane with uniform height;
carrying out oxidation treatment on the grain unit until a tip appears at the top of the grain unit;
cleaning the photosensitive resist;
attaching the grain paper with the same grain peak distribution as that of the grain unit to the grain unit;
and (4) carrying out oxidation treatment on the grain units attached with the grain paper until the height of the grain peaks of the grain units meets the requirement.
Furthermore, the spraying thickness of the photosensitive glue is 20 mu-30 mu.
Furthermore, the photosensitive emulsion is prepared by dissolving 0.8-1.2kg of shellac in 400-500 ml of alcohol.
Further, the liquid medicine is strong acid liquid medicine to corrode the line units.
Further, the temperature of the liquid medicine oxidation treatment process is 8-12 ℃.
Furthermore, after the texture of the damaged area is repaired, sand blasting is carried out to adjust the surface glossiness of the mold.
Further, the sand blasting for adjusting the surface glossiness of the mold was performed using brown corundum of 220.
Further, the photosensitive resist is cleaned by sand blasting, and glass beads with the specification of 150 and brown corundum with the specification of 220 are adopted, wherein the weight ratio of 3:2 parts by weight of the mixture.
Furthermore, the covered area of the pattern paper and the pattern peak distribution of the pattern units are the same, so that the uncovered area of the pattern paper and the liquid medicine are subjected to oxidation reaction.
Further, when the damage of the surface texture of the mold is more than 1 square centimeter, the mold has large surface texture damage.
Compared with the prior art, the invention has the advantages that:
according to the method, a protective film is adhered to a die cavity surface with large-area surface texture damage to protect a region which does not need to be repaired, photosensitive glue with the thickness of H2 is sprayed to the damaged region, the surface is polished until the top of a texture unit has a plane with the uniform height, the height of a texture peak of the texture unit is H3, then the texture unit is oxidized by liquid medicine until the top of the texture unit has a tip, the photosensitive glue is cleaned by sand blasting, finally, texture paper with the same texture peak distribution as that of the texture unit is attached to the texture unit, the texture unit is oxidized by the liquid medicine until the height of the texture peak of the texture unit is H1, the texture repair of the damaged region is completed, the whole repair process does not need to be subjected to surface reduction and polishing treatment on the die, the repair efficiency is improved, the texture defect with the larger area can be repaired by operating one round of the texture paper, the processing cost caused by repeated treatment is saved, and the dependence on the whole surface reduction equipment of the die is greatly reduced.
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.
Fig. 1 is a flowchart of a method for repairing surface texture of a mold according to an embodiment of the present disclosure;
FIG. 2 is a schematic cross-sectional view of a damaged texture on a surface of a mold according to an embodiment of the present disclosure;
FIG. 3 is a schematic cross-sectional view illustrating a photoresist sprayed according to an embodiment of the present application;
FIG. 4 is a schematic cross-sectional view of a polished section provided in an embodiment of the present application;
FIG. 5 is a schematic cross-sectional view of a liquid medicine treated according to an embodiment of the present disclosure;
FIG. 6 is a schematic cross-sectional view of a spray rinse provided in an embodiment of the present application;
FIG. 7 is a schematic cross-sectional view of a substrate after oxidation treatment according to an embodiment of the present disclosure;
in the figure: 1. a grain unit; 2. and (5) photosensitive glue.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative 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 to 7, a method for repairing surface texture of a mold comprises the following steps:
as shown in fig. 2, a mold having a large area of damage to the surface texture is taken, the texture valley position of the surface texture of the mold is indicated by L1 in the cross-sectional views of fig. 2 to 7, and the texture peak position of the surface texture of the mold is indicated by L2 in the cross-sectional views of fig. 2 to 7.
The non-repair region in the die cavity surface adheres to the protective film, the protective film is attached to the die cavity surface, and after the movable carrier of the protective film is removed, the movable carrier can be directly removed, the protective film protects the region which does not need to be repaired, the protective film is attached to the non-repair region in a colloidal manner, secondary damage caused to the non-repair region due to repair operation of a damaged region is avoided, the region which needs to be repaired comprises damaged grain units and a part of undamaged grain units around the damaged grain units, the undamaged grain units provide grain repair reference, and consistency is achieved between the grain units after repair and the grain units after repair.
Specifically, the main components of the protective film comprise a 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, the non-repaired area is protected after the protective film is cured, and unnecessary errors caused by matching of a mold are avoided.
As shown in fig. 3, the damaged area in the cavity surface of the mold is sprayed with the photosensitive resist with the thickness of H2, the photosensitive resist can make the operator clearly distinguish the surface of the grain unit, in order to improve the obvious degree of the photosensitive resist, a certain amount of toner can be added in the preparation of the photosensitive resist, and the color of the toner can be obviously contrasted with the color of the material of the mold.
As shown in fig. 4, the surface is polished until a plane with a uniform height appears at the top of the grain unit, the height of the grain peak of the grain unit is H3, when the grain unit is polished, the damaged grain unit and the grain unit which is not damaged around the grain unit are polished, and the grain unit in the polishing area can be kept at the same position height after being polished, that is, the distance between the grain valley and the grain peak is H3.
As shown in fig. 5, adopt liquid medicine to carry out oxidation treatment to line unit, appear most advanced until line unit top, this liquid medicine can and the mould main part between take place oxidation reaction and corruption mould main part, can immerse the holistic face of polishing of this mould into liquid medicine during the operation, the line unit after i.e. will polishing begins to corrode from the face of polishing, the marginal portion in the region of polishing begins to corrode from the line unit to liquid medicine, the both sides edge subassembly of line unit is corroded the back by liquid medicine, form the line unit that has the point, and have elastic photosensitive glue and continue attached on line unit lateral wall after line unit edge corrodes, and at the attached in-process of photosensitive glue deformation, the line unit is by supreme smooth slope section that forms gradually down.
The main components of the liquid medicine are concentrated sulfuric acid and silver nitrate, the liquid medicine is used for reacting after being contacted with a grain unit and replacing iron corrosion, and the specific reaction chemical formula is as follows: 2Fe +6H 2 SO 4 (dense) = = =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 cleaned by sandblasting, and compressed air mixed with sand or abrasive particles is sprayed to the area of the mold where the photoresist is attached, so as to clean the photoresist on the vein unit and directly expose the entire vein unit.
As shown in fig. 7, the grain units are oxidized by using liquid medicine until the height of the grain peak of the grain unit is H1, and the regions where all the grain units are located on the mold are oxidized by using the liquid medicine, so that the whole grain of the grain units is lowered by a certain distance, at the moment, the height of the H1 is the same as the height of the grain units on the surface layer of the mold without damage, the shape of the grain units meets the design requirement, and the grain repair of the damaged regions is completed.
The working principle of the embodiment is as follows: in the die cavity surface with large-area surface texture damage, a protective film is adhered to protect an area which does not need to be repaired, photosensitive glue with the thickness of H2 is sprayed in the damaged area, the surface with the uniform height is polished until the top of a texture unit appears, the height of a texture peak of the texture unit is H3, then the texture unit is oxidized by liquid medicine until the top of the texture unit appears pointed, the photosensitive glue is cleaned by sand blasting, finally, the texture paper with the same texture peak distribution as that of the texture unit is attached to the texture unit, the texture unit is oxidized by the liquid medicine until the height of the texture peak of the texture unit is H1, the texture repair of the damaged area is completed, the whole repair process does not need to carry out surface reduction and polishing on the die, the repair efficiency is improved, the texture defect with the slightly large area can be repaired by operating one round of the texture paper, the processing cost of repeated treatment is saved, and the dependence on the whole surface reduction device of the die is saved.
Further, on the basis of the above embodiment, the spraying thickness of the photosensitive glue is 20 μ to 30 μ, and the laminated structure formed by the photosensitive glue has a certain deformation capability while the photosensitive glue is kept to have a protection effect, and can be attached to the grain unit through the deformation restoring force.
Further, on the basis of the above embodiment, the photosensitive glue is prepared by dissolving 0.8-1.2kg of shellac in 400-500 ml of alcohol, specifically, the alcohol can be 95% medical alcohol, and the shellac is generally purple natural resin secreted by the shellac sucking the host tree sap and mainly contains shellac resin, shellac wax and shellac pigment.
Further, in addition to the above embodiments, the chemical liquid may be a strong acid chemical liquid with other components to corrode the texture unit.
Further, on the basis of the above embodiment, the temperature of the liquid medicine oxidation treatment process is 8-12 ℃, and specifically, a corrosion temperature of 10 ℃ can be selected to improve the corrosion efficiency.
Further, on the basis of the embodiment, after the texture of the damaged area is repaired, sand blasting is carried out to adjust the surface gloss of the die, and the side wall of the texture unit is corroded to a certain degree and is also used for being attached to the outer surface of a production workpiece, so that the service life of the die can be prolonged by adjusting the thickness of the surface of the die.
Further, on the basis of the above-mentioned examples, the sand blasting for adjusting the surface gloss of the mold was performed using brown corundum of 220, and the sand blasting for cleaning the photoresist was performed using glass beads of 150 and brown corundum of 220 in a ratio of 3:2 parts by weight of the mixture.
Further, on the basis of the above examples, H1 is greater than H3, and H1 is greater than H2.
Further, on the basis of the above embodiment, the covered area of the textured paper and the texture peak distribution of the textured unit are the same, so that the uncovered area of the textured paper and the liquid medicine undergo an oxidation reaction.
The method comprises the steps of taking a piece of line paper which is the same as the texture peak distribution of a line unit and attaching the line paper to the line unit, specifically, adopting the line paper which is the same as the surface texture of a mould in order to keep the consistency of the line unit and the original texture, further still having a coincident part between the line paper and the texture of the surface of the mould when the local part of the surface texture is damaged, and taking the coincident texture part as positioning, synchronously, and corresponding to the texture to be repaired on the line paper on the damaged texture.
Further, on the basis of the above embodiments, when the damage of the surface texture of the mold is greater than 1 square centimeter, the mold is a mold having a large area of damage of the surface texture, and the application does not expand the repair method used when the damage of the surface texture of the mold is not greater than 1 square centimeter.
In actual application, the following specific operation steps are carried out:
step 1: providing a die with damaged surface textures, judging and selecting the die with the damaged surface textures larger than 1 square centimeter and the texture peak height of the texture unit of H1, moving the die to a repair area, and cleaning the surface of the die;
step 2: adhering a protective film on a non-repair area in the cavity surface of the mold;
and step 3: dissolving 1.2kg of shellac in 500ml of 95% medical alcohol to obtain a photosensitive glue, adding blue toner into the photosensitive glue, uniformly mixing, and spraying the photosensitive glue on a damaged area in a mold cavity surface with the thickness of 30 mu;
and 4, step 4: polishing the top of the grain unit by using a polishing machine until the distance from the grain peak to the grain valley of the plurality of polished grain units is 2mm;
and 5: carrying out oxidation treatment on the grain units by adopting liquid medicine at the temperature of 10 ℃ until tips appear on the tops of the grain units;
step 6: glass beads of specification 150 and brown corundum of specification 220 were used at a ratio of 3:2, carrying out sand blasting on the mixture according to the parts by weight to clean the photosensitive resist;
and 7: attaching grain paper with the same grain peak distribution as that of the grain units to the grain units;
and step 8: oxidizing the texture units by using a liquid medicine until the height of the texture peaks of the texture units is restored to H1 again;
and step 9: adopting brown corundum with the specification of 220 to perform 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 (4) detaching the repaired mould from the treatment position and packaging.
It should be understood that the terms first, second, etc. are used merely for distinguishing between descriptions and are not intended to indicate or imply 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. 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" herein is only one kind of association relationship describing the association object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, B exists alone, and A and B exist at the same time, and the term "/and" is used herein to describe another association object relationship, which means that two relationships may exist, for example, A/and B, may mean: the presence of a alone, and both cases a and B alone, and further, the character "/" herein generally means that the former and latter associated objects are in an "or" relationship.
It is to be understood that the terms "upper," "vertical," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship that is conventionally used for placing the disclosed articles of manufacture or that is conventionally understood by those skilled in the art, which is intended merely to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled 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 otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but 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 facilitate 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 instances, well-known processes, structures and techniques may be shown without unnecessary detail in order to avoid obscuring example embodiments.
The foregoing are merely exemplary embodiments of the present application and are presented to enable those skilled in the art to understand and practice the present 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. A method for repairing surface texture of a mold is characterized by comprising the following steps:
providing a mould, and confirming that the provided mould has large-area surface texture damage;
adhering a protective film to a non-repair area in the provided mould cavity surface;
spraying photosensitive glue on the damaged area in the provided mould cavity surface;
polishing the grain units of the die until the tops of the grain units form a plane with a uniform height;
carrying out oxidation treatment on the grain unit until a tip appears at the top of the grain unit;
attaching the grain paper with the same grain peak distribution as that of the grain unit to the grain unit;
and (4) carrying out oxidation treatment on the grain units attached with the grain paper until the height of the grain peaks of the grain units meets the requirement.
2. The method of repairing surface texture of a mold according to claim 1, wherein: the spraying thickness of the photosensitive glue is 20 mu-30 mu.
3. The method of repairing the surface texture of a mold according to claim 2, wherein: the photosensitive emulsion is prepared by dissolving 0.8-1.2kg of shellac in 400-500 ml of alcohol.
4. The method of repairing surface texture of a mold according to claim 1, wherein: the liquid medicine is strong acid liquid medicine to corrode the line units.
5. The method of repairing the surface texture of a mold according to claim 4, wherein: the temperature of the liquid medicine oxidation treatment process is 8-12 ℃.
6. The method of repairing surface texture of a mold according to claim 1, wherein: and after finishing the texture repair of the damaged area, performing sand blasting to adjust the surface glossiness of the mold.
7. The method of repairing surface texture of a mold according to claim 6, wherein: the sand blasting when adjusting the surface glossiness of the mould is carried out by adopting brown corundum with the specification of 220.
8. The method of repairing surface texture of a mold according to claim 1, wherein: and cleaning the photosensitive resist by adopting sand blasting, and adopting 150-specification glass beads and 220-specification brown corundum in a ratio of 3:2 parts by weight of the mixture were subjected to sand blasting.
9. The method of repairing surface texture of a mold according to claim 1, wherein: the texture peaks of the texture paper covering area and the texture units are distributed in the same way, so that the uncovered area of the texture paper and the liquid medicine are subjected to oxidation reaction.
10. The method of repairing the surface texture of a mold according to claim 1, wherein: when the damage of the surface texture of the mold is more than 1 square centimeter, the mold is provided 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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| 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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| CN115283935B (en) | 2023-04-25 |
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