CN115181976A - Mold surface treatment process - Google Patents

Mold surface treatment process Download PDF

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Publication number
CN115181976A
CN115181976A CN202210842572.9A CN202210842572A CN115181976A CN 115181976 A CN115181976 A CN 115181976A CN 202210842572 A CN202210842572 A CN 202210842572A CN 115181976 A CN115181976 A CN 115181976A
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CN
China
Prior art keywords
mould
mold
die
polishing
treatment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210842572.9A
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Chinese (zh)
Inventor
肖红金
谈欢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Jinyu Technology Co ltd
Original Assignee
Anhui Jinyu Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anhui Jinyu Technology Co ltd filed Critical Anhui Jinyu Technology Co ltd
Priority to CN202210842572.9A priority Critical patent/CN115181976A/en
Publication of CN115181976A publication Critical patent/CN115181976A/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F3/00—Brightening metals by chemical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/20—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
    • B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/04—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering with simultaneous application of supersonic waves, magnetic or electric fields
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/10—Oxidising
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/24—Nitriding

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The invention relates to the technical field of dies and discloses a die surface treatment process which comprises the following steps: s1, taking a mould by using clean gauze, wiping the surface of the mould by dipping absorbent cotton with a wet solvent, and removing large-area or thick stains; s2, placing the preliminarily treated mould into a solution tank, soaking treatment liquid in the solution tank, wherein the treatment liquid is a mixture of chloroethylene, ethyl acetate, ethanol and water in a required proportion, and degreasing oil stains on the surface of the mould and oil stains in the corners of the mould through the treatment liquid; carry out preliminary greasy dirt through the cotton wool to the surface and handle, then carry out the advanced treatment through the treatment fluid to mould surface greasy dirt spot, refine its surface through polishing, reach the user demand, then carry out wear resistance and corrosion resisting property's processing through thermal treatment to its surface, increase technological properties, and realize low-cost high benefit effect.

Description

Mold surface treatment process
Technical Field
The invention relates to the technical field of molds, in particular to a mold surface treatment process.
Background
The mold is a mold and a tool for obtaining a desired product by injection molding, blow molding, extrusion, casting, molding, smelting, stamping, drawing, etc. in industrial production. In short, a mold is a tool used to shape an article. The technical level of the mould is an important mark for measuring the level of the manufacturing industry.
The mould need handle the surface after producing, guarantees the surface accuracy and the mould performance in later stage, and the mould is after using a period, can appear wearing and tearing, oxidation, or be infected with the greasy dirt scheduling problem, leads to equipment error to appear, needs to change the maintenance.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a die surface treatment process, which solves the problems in the background art.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a mold surface treatment process comprises the following steps:
s1, taking a mould by using clean gauze, wiping the surface of the mould by dipping absorbent cotton with a wet solvent, and removing large-area or thick stains;
s2, placing the preliminarily treated mould into a solution tank, soaking treatment liquid in the solution tank, wherein the treatment liquid is a mixture of chloroethylene, ethyl acetate, ethanol and water in a required proportion, and degreasing oil stains on the surface of the mould and oil stains inside corners of the mould through the treatment liquid;
s3, taking out the die after soaking for a certain time in the step S2, washing the die for multiple times by using clear water, and drying the die;
s4, polishing the clean die, sequentially polishing the abrasive paper with different precisions to ensure the surface treatment of the die, and sequentially polishing the coarse abrasive paper to the fine abrasive paper for multiple times according to the thickness of the abrasive paper during polishing;
s5, polishing the polished mould, wherein the rough polishing is carried out on the mould on a polishing machine through fine canvas and a Cr2O3 solution, then the fine polishing is carried out on the mould on the polishing machine through nylon velvet and the Cr2O3 solution, and the roughness is less than 0.04 when the grinding marks are completely removed and the surface is like a mirror surface;
s6, soaking the polished mold in a nitric acid solution with a certain concentration, washing the mold with water after soaking, and drying the mold;
s7, carrying out heat treatment on the die, placing the die into an air resistance furnace for pre-oxidation treatment, placing the oxidized die into a nitriding furnace for heat treatment after a certain time, and applying a direct current electric field to the die through a power supply and an electrode device during the heat treatment;
s8, taking out the heat-treated mould, performing water cooling, putting the cooled mould into a silane solution for surface adhesion, and then curing the mould through a drying oven.
Preferably, in the step S2, the ratio of vinyl chloride, ethyl acetate, ethanol, and water in the treatment solution is 1.5:1:1:15.
preferably, in the step S7, the temperature in the air resistance furnace is set to 350 to 400 ℃, the initial temperature in the nitriding furnace is not lower than 300 ℃, and the temperature is increased to 550 to 580 ℃ during heat treatment in the nitriding furnace, and heat preservation is performed.
Preferably, in the step S7, the electrode bar is used as a positive electrode, the mold is used as a negative electrode, and the electrode and the mold are parallel to each other and two electrodes are respectively and correspondingly connected to the positive electrode and the negative electrode of the external control dc power supply device.
Preferably, in the step S8, the mixture ratio is 4-5ml of urea, 3-3.5ml of aniline methyl triethoxysilane, 0.3-0.4ml of sodium carbonate, 0.2-0.3ml of ethyl silicate, 0.5-0.6ml of sodium metasilicate pentahydrate, 1.5-1.8ml of sodium gluconate, and 10-15ml of deionized water.
Preferably, in the step S8, the temperature in the drying oven is 100-120 ℃, and the curing time is 60-80 minutes.
(III) advantageous effects
The invention provides a mold surface treatment process, which has the following beneficial effects:
(1) According to the invention, the surface is subjected to primary oil stain treatment through absorbent cotton, then oil stain stains on the surface of the die are subjected to advanced treatment through the treatment liquid, the surface is refined through grinding and polishing to meet the use requirement, then the surface is subjected to treatment of wear resistance and corrosion resistance through heat treatment, the process performance is increased, and the effects of low cost and high benefit are realized.
(2) The method comprises the steps of carrying out pre-oxidation treatment on the die in an air resistance furnace, removing water on the surface layer of the die, forming a layer of light blue oxide film on the surface of the die, promoting the penetration of nitrogen atoms, enabling the appearance color of the die to be uniform, forming a layer of high-wear-resistance and corrosion-resistance penetrated layer structure on the surface of the die by applying a direct current electric field, strengthening and modifying the surface of the die, and hardly deforming the surface of the die.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of 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 invention.
The invention provides a technical scheme that: a mold surface treatment process comprises the following steps:
s1, taking a mould by using clean gauze, wiping the surface of the mould by dipping absorbent cotton with a wet solvent, and removing large-area or thick stains;
s2, placing the preliminarily treated mould into a solution tank, soaking treatment liquid in the solution tank, wherein the treatment liquid is a mixture of chloroethylene, ethyl acetate, ethanol and water in a required proportion, and degreasing oil stains on the surface of the mould and oil stains inside corners of the mould through the treatment liquid;
s3, taking out the die after soaking for a certain time in the step S2, washing the die for multiple times by using clear water, and drying the die;
s4, polishing the clean die, sequentially polishing the abrasive paper with different precisions to ensure the surface treatment of the die, and sequentially polishing the coarse abrasive paper to the fine abrasive paper for multiple times according to the thickness of the abrasive paper during polishing;
s5, polishing the polished mould, wherein the rough polishing is carried out on the mould on a polishing machine through fine canvas and a Cr2O3 solution, then the fine polishing is carried out on the mould on the polishing machine through nylon velvet and the Cr2O3 solution, and the roughness is less than 0.04 when the grinding marks are completely removed and the surface is like a mirror surface;
s6, soaking the polished mold in a nitric acid solution with a certain concentration, cleaning with water after soaking, and drying;
s7, carrying out heat treatment on the die, placing the die into an air resistance furnace for pre-oxidation treatment, placing the oxidized die into a nitriding furnace for heat treatment after a certain time, and applying a direct current electric field to the die through a power supply and an electrode device during the heat treatment;
s8, taking out the heat-treated mould, performing water cooling, putting the cooled mould into a silane solution for surface adhesion, and then curing the mould through a drying oven.
The method is characterized in that the temperature in the air resistance furnace is set to be 350-400 ℃, the initial temperature in the nitriding furnace is not lower than 300 ℃, the temperature in the nitriding furnace is raised to 550-580 ℃ for heat preservation treatment during heat treatment, an electrode bar is used as a positive electrode, the mold is used as a negative electrode, the electrode and the mold are parallel to each other, the two electrodes are respectively and correspondingly connected to the positive electrode and the negative electrode of an external control direct current power supply device, and a direct current electric field is applied to the electrode through a power supply.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. A mold surface treatment process is characterized by comprising the following steps:
s1, taking a mould by using clean gauze, wiping the surface of the mould by dipping absorbent cotton with a wet solvent, and removing large-area or thick stains;
s2, placing the preliminarily treated mould into a solution tank, soaking treatment liquid in the solution tank, wherein the treatment liquid is a mixture of chloroethylene, ethyl acetate, ethanol and water in a required proportion, and degreasing oil stains on the surface of the mould and oil stains in the corners of the mould through the treatment liquid;
s3, taking out the die after soaking for a certain time in the step S2, washing the die for multiple times by using clear water, and drying the die;
s4, polishing the clean die, sequentially polishing the abrasive paper with different precisions to ensure the surface treatment of the die, and sequentially polishing the coarse abrasive paper to the fine abrasive paper for multiple times according to the thickness of the abrasive paper during polishing;
s5, polishing the polished mold, namely performing rough polishing on the mold on a polishing machine through fine canvas and a Cr2O3 solution, and then performing fine polishing on the mold on the polishing machine through nylon velvet and the Cr2O3 solution until grinding marks are completely removed and the surface of the mold is like a mirror surface, wherein the roughness of the mold is less than 0.04;
s6, soaking the polished mold in a nitric acid solution with a certain concentration, washing the mold with water after soaking, and drying the mold;
s7, carrying out heat treatment on the die, placing the die into an air resistance furnace for pre-oxidation treatment, placing the oxidized die into a nitriding furnace for heat treatment after a certain time, and applying a direct current electric field to the die through a power supply and an electrode device during the heat treatment;
s8, taking out the heat-treated mould, performing water cooling, putting the cooled mould into a silane solution for surface adhesion, and then curing the mould through a drying oven.
2. The mold surface treatment process according to claim 1, wherein: in the step S2, the ratio of vinyl chloride, ethyl acetate, ethanol and water in the treatment liquid is 1.5:1:1:15.
3. the mold surface treatment process according to claim 1, wherein: in the step S7, the temperature in the air resistance furnace is set to be 350-400 ℃, the initial temperature in the nitriding furnace is not lower than 300 ℃, and the temperature is raised to 550-580 ℃ during heat treatment in the nitriding furnace, and heat preservation treatment is carried out.
4. The mold surface treatment process according to claim 1, wherein: and in the step S7, the electrode bar is used as a positive electrode, the mould is used as a negative electrode, the electrode and the mould are mutually kept parallel, and the two electrodes are respectively and correspondingly connected to the positive electrode and the negative electrode of the external control direct current power supply device.
5. The mold surface treatment process according to claim 1, wherein: in the step S8, the mixture ratio is 4-5ml of urea, 3-3.5ml of aniline methyl triethoxysilane, 0.3-0.4ml of sodium carbonate, 0.2-0.3ml of ethyl silicate, 0.5-0.6ml of sodium metasilicate pentahydrate, 1.5-1.8ml of sodium gluconate and 10-15ml of deionized water.
6. The mold surface treatment process according to claim 1, wherein: in the step S8, the temperature in the drying oven is 100-120 ℃, and the curing time is 60-80 minutes.
CN202210842572.9A 2022-07-18 2022-07-18 Mold surface treatment process Pending CN115181976A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210842572.9A CN115181976A (en) 2022-07-18 2022-07-18 Mold surface treatment process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210842572.9A CN115181976A (en) 2022-07-18 2022-07-18 Mold surface treatment process

Publications (1)

Publication Number Publication Date
CN115181976A true CN115181976A (en) 2022-10-14

Family

ID=83520291

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210842572.9A Pending CN115181976A (en) 2022-07-18 2022-07-18 Mold surface treatment process

Country Status (1)

Country Link
CN (1) CN115181976A (en)

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