CN110789041A - Method for processing antique melamine tableware - Google Patents
Method for processing antique melamine tableware Download PDFInfo
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- CN110789041A CN110789041A CN201911120573.7A CN201911120573A CN110789041A CN 110789041 A CN110789041 A CN 110789041A CN 201911120573 A CN201911120573 A CN 201911120573A CN 110789041 A CN110789041 A CN 110789041A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/14—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles in several steps
- B29C43/146—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles in several steps for making multilayered articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
- B29B13/022—Melting the material to be shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
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- 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
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/14—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles in several steps
- B29C43/146—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles in several steps for making multilayered articles
- B29C2043/147—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles in several steps for making multilayered articles by compressing after the laying of further material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
- B29C2043/5808—Measuring, controlling or regulating pressure or compressing force
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
- B29C2043/5816—Measuring, controlling or regulating temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2061/00—Use of condensation polymers of aldehydes or ketones or derivatives thereof, as moulding material
- B29K2061/20—Aminoplasts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/28—Tools, e.g. cutlery
- B29L2031/286—Cutlery
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Abstract
The invention relates to a method for processing antique melamine tableware, which comprises the processes of mould preparation, stained paper preparation, mould preheating, raw material compression molding, stained paper molding and gold adding molding; according to the invention, the mold is processed, so that the bright fog effect of the mold is obvious, the bright fog boundary is clear, the prepared product is more attractive in effect, and meanwhile, the stained paper used in the applique process is processed, so that the stained paper can be accurately copied onto the mold, the pattern of the mold is completely matched with the pattern of the stained paper, the error is reduced, and the effect of antique tableware is achieved.
Description
Technical Field
The invention belongs to the technical field of tableware processing, and particularly relates to a processing method of antique melamine tableware.
Background
Melamine tableware, also known as porcelain-like tableware, is formed by heating, pressurizing and pressing melamine resin powder, and is used in catering industry, children diet and the like due to the properties of lightness, attractiveness, low temperature resistance, low breakage resistance and the like. Melamine tableware belongs to high molecular polymers, and monomers of the melamine tableware are formaldehyde and melamine, and melamine powder is known as melamine formaldehyde resin. The production principle of melamine tableware is that melamine raw material is heated at a certain temperature, then a certain pressure is applied to the melamine raw material, the melamine raw material is subjected to polycondensation reaction in a forming machine under the action of the temperature and the pressure, and the melamine raw material is cured and formed after being exhausted.
In the prior art, the processing technology of melamine tableware is generally divided into (1) preheating procedures: weighing the materials by using a raw material box according to the gram weight of the tableware to be produced, weighing, putting into a high-frequency wave modulation device, uniformly preheating, and heating the powdery raw materials into blocks; (2) a dough kneading procedure, namely pouring the preheated and agglomerated raw materials into a mold, starting a mechanical dough kneading procedure, and carrying out high-temperature high-pressure curing molding; (3) decal procedure: cutting the stained paper with the coated gloss powder according to the shape of the flower, pasting the stained paper on tableware formed by plain surface according to the requirement, starting a mechanical printing program after pasting the flower, and printing the stained paper on the tableware by performing secondary compression molding on a compression molding machine; (4) adding gold: after the product is pasted with patterns, uniformly scattering polishing powder on the surface of the product, starting a machine, and mechanically curing at high temperature and high pressure to obtain the product with the general brightness of porcelain; (5) and (3) polishing procedure: and grinding and polishing are carried out after the product is produced, and burrs of the product can be removed through grinding and polishing.
The Chinese patent with the publication number of CN101670640B discloses a production method of applique gold added melamine tableware, which is realized by the following steps: (1) molding a melamine primary product; (2) applique; (3) putting the melamine tableware subjected to applique into a mould and pressurizing; (4) slightly opening the mold to discharge gas generated during pressurization; (5) after exhausting, closing the mould and pressurizing to prepare a decal product; (6) opening the mould, and adding gold on the inner wall or the outer wall of the applique melamine tableware; (7) putting the product after gold addition into a mould for pressurization; (8) slightly opening the mold to discharge gas generated during pressurization; (9) closing the mold and pressurizing after exhausting, and opening the mold to obtain the melamine tableware with the applique and the gold; the invention enables the production raw materials to react to meet the design requirements of the product process by controlling the temperature of the die and the pressure in the production process; the gas generated in the production process of the product is fully discharged by controlling the discharge time of the gas generated in the processing process, so that the safe and environment-friendly applique melamine tableware is ensured to be produced. However, the method provided by the invention provides a universal processing method for melamine tableware, and antique melamine tableware which has finer requirements on tableware patterns and is more durable cannot be quickly processed.
Disclosure of Invention
The invention aims to solve the technical problems, and provides a method for processing antique melamine tableware, which is used for processing a mould, so that the mould has obvious bright fog effect and clear bright fog boundary, the prepared product has more attractive effect, and meanwhile, the stained paper used in the applique process is processed, so that the stained paper can be accurately copied onto the mould, the pattern of the mould is completely matched with the pattern of the stained paper, the error is reduced, and the effect of the antique tableware is achieved.
The technical scheme of the invention is as follows:
a processing method of antique melamine tableware specifically comprises the following steps:
s1, preparing a die: the mold is subjected to CNC computer routing processing, polishing processing and division of a bright surface and a matte surface by using hydrochloric acid corrosion in sequence and then is electroplated to form a bright-fog alternate effect, wherein the bright surface is a convex part, and the matte surface is a concave part;
s2, preparing stained paper: performing stained paper design according to the specification of a mould and bright surface and matte surface lines, drying the designed and printed stained paper, preparing a liquid medicine by using gold powder and water at 100 ℃ to wipe the stained paper for the first time, preparing the liquid medicine by using the gold powder and the water at 70 ℃ again after drying to wipe the stained paper for the second time, and drying for later use;
s3, preheating a die: placing the mold on a forming machine, and preheating the mold processed in the step S1 by using the forming machine, wherein the preheating temperature of the mold is 160-165 ℃ and the temperature is kept;
s4, raw material compression molding: after the temperature of the mold is stable, preheating standard materials for preparing melamine tableware in high frequency to soften the raw materials, putting the softened raw materials into a lower mold of a forming machine, and extruding the raw materials by using an upper mold in the forming machine to prepare a preform;
s5, forming stained paper: positioning the dried standby stained paper along the frame of the mold, then pasting the stained paper on the surface of the preformed product formed by the first pressing, and performing the second pressing by using a forming machine to form the decal preformed product;
s6, adding gold for forming: adding about 10-30 g of gold powder on the surface of the applique preform, pressing into a finished product, and performing coarse grinding and trimming to obtain the antique melamine tableware.
Further, the mould includes decorative pattern part and sets up the framed of outwards extending in decorative pattern part outer lane, and framed for octagon and octagon length are all inequality, and the outer lane of framed is vertical upwards to form spacing limit, and spacing limit is higher than decorative pattern part 3~5 cm.
Furthermore, the difference between two adjacent sides of the die frame is 3-5 cm.
Further, in the step S1, the bright surface and the matte surface are divided by using a hydrochloric acid solution to corrode the mold, and the method specifically includes the following steps:
a1, coating blue gel to cover the part of the mould which does not need to be corroded to form a concave surface;
a2, after covering, corroding the exposed grains with a hydrochloric acid solution for 15-20 min to form depressions;
a3, cleaning after lines are formed by corrosion, then electroplating, and polishing the part covered with the blue gel after the electroplating is finished, so that the effect of alternate bright fog can be realized.
Furthermore, the dosage of the hydrochloric acid in the hydrochloric acid solution is 80%, the balance is water, and the concentration of the hydrochloric acid is 98%. .
Further, the extrusion pressure of the raw material extruded by the die in the step S4 is 150 to 180 kgf/cm2The forming time is 50-100 s, the mold is opened in the forming process to remove gas generated by extruding the raw materials in the mold, and the air leakage time is 1-2 s.
Further, in the step S5, the secondary pressing is performed by using a forming machineThe pressing pressure of the applique preform is 150-180 kgf/cm2The forming time is 8-10 s, and the air leakage time is 1 s.
Further, in the step S6, in the gold adding and forming process, the forming pressure is 100-180 kgf/cm2The forming time is 25-35 s, and the air leakage time is 1-2 s.
The invention has the following beneficial effects:
1. according to the processing method of the antique melamine tableware, the mold is processed before raw materials are pressed, in the prior art, the mold is usually polished and then discharged, then fog surface electroplating is carried out, then polishing treatment is carried out, and selective pattern polishing is required according to customer requirements during polishing treatment, so that the bright fog effect of the processed mold is not obvious, the boundary is not clear, and the requirement on fine lines of the conventional tableware cannot be met; according to the invention, after the die is polished, the part which is not to be processed in the preset grains is covered by blue gel, after the covering is finished, the part which is not covered is prepared into corrosive liquid medicine by hydrochloric acid and an additional solvent to corrode the part of the grains for 15 minutes, at the moment, the part which is not covered is sunken due to the action of the corrosive liquid medicine, the part covered by the blue gel obstructs the corrosion process, after the corrosion, the die is cleaned and electroplated, after the electroplating is finished, the part which is originally covered is polished, so that the obvious effect of alternate bright fog can be generated on the part of the grains, the bright fog effect is obvious, the boundary is clear, and the beautiful antique effect can be formed on tableware in the subsequent pressing process.
2. The mould used in the material pressing process is improved, the mould in the prior art is usually circular, the mould designed in the invention is provided with a mould frame with eight sides and unequal eight sides, the mould frame is provided with a vertical upward limiting side, the eight-side mould and the limiting side can well and accurately position the stained paper to be pressed placed on the preformed product, the stained paper is matched with the mould and can accurately copy the pattern onto the preformed product, the pattern dislocation of the finished tableware product caused by the movement of the stained paper in the stained paper pressing process is effectively prevented, and the error of 2-5 mm difference between the original stained paper and the mould in the pressing process is reduced to the error within 0.05mm at most.
3. The invention adopts a method of wiping stained paper twice in the process of treating the stained paper, thoroughly wipes the stained paper, enables the stained paper to be well blended into the raw materials and to be closely combined with the raw materials, prolongs the service life of tableware and improves the product quality.
4. According to the invention, standardized data are set in the processes of treating the die, treating the stained paper, pressing for the first time, pressing for the second time and gold adding and forming, so that on one hand, the temperature resistance and the quality of the antique melamine tableware are improved, and on the other hand, the processing efficiency of the antique melamine tableware is improved.
Drawings
FIG. 1 is a schematic view of the structure of a mold according to the present invention;
FIG. 2 is a schematic view of the matching structure of the mold and the pressing table of the molding machine according to the present invention.
1. A texture portion; 2. a mold frame; 3. a limiting edge; 4. a pressing table; 41. and (4) a groove.
Detailed Description
The invention will be further described with reference to preferred embodiments.
Example 1
A processing method of antique melamine tableware specifically comprises the following steps:
s1, preparing a die: the die is sequentially subjected to CNC computer routing and polishing treatment, after the polishing treatment, blue glue is used for smearing and covering a die part which does not need to be corroded to form a concave surface, a matte surface and a bright surface are distinguished on a plane, and after the covering is finished, exposed lines are corroded for 15min by using a hydrochloric acid solution, and then the lines are sunken; after the etching is finished, cleaning and electroplating are carried out after lines are formed, and after the electroplating is finished, polishing is carried out on the part covered with the blue gel, so that an obvious bright-fog alternate effect can be formed, wherein the bright surface is a convex part, and the fog surface is a concave part;
s2, preparing stained paper: performing stained paper design according to the specification of a mould and bright surface and matte surface lines, drying the designed and printed stained paper, preparing a liquid medicine by using gold powder and water at 100 ℃ to wipe the stained paper for the first time, preparing the liquid medicine by using the gold powder and the water at 70 ℃ again after drying to wipe the stained paper for the second time, and drying for later use;
s3, preheating a die: placing the mold on a forming machine, and preheating the mold processed in the step S1 by using the forming machine, wherein the preheating temperature of the mold is 160 ℃ and the temperature is kept;
s4, raw material compression molding: after the temperature of the upper and lower dies is stable, the standard materials for preparing melamine tableware are placed in a high frequency wave for preheating to soften the raw materials, the softened raw materials are put into a die positioned below a forming machine, and the raw materials are extruded by the die positioned above the forming machine to prepare a preform; wherein the extrusion pressure of the raw material extruded by the die is 150 kgf/cm2The molding time is 100s, the mold is opened to remove gas generated by extruding the raw material in the mold in the molding process, and the air leakage time is 2 s;
s5, forming stained paper: positioning the dried standby stained paper along the frame of the mold, then pasting the stained paper on the surface of the preformed product formed by the first pressing, and performing the second pressing by using a forming machine to form the decal preformed product; wherein the secondary pressing is performed under a pressing pressure of 180 kgf/cm to form the decal preform2The forming time is 8s, and the air leakage time is 1 s;
s6, adding gold for forming: adding about 10g of gold powder on the surface of the applique preform, and pressing to obtain the final product, wherein the forming pressure is 100 kgf/cm2The forming time is 25s, and the air leakage time is 2 s; and finally, carrying out coarse grinding processing and trimming processing to obtain the antique melamine tableware.
Referring to fig. 1 and 2, the die comprises a texture part 1 and a die frame 2 arranged on the outer ring of the texture part 1 and extending outwards, the die frame 2 is octagonal, the lengths of eight sides are different, a limiting edge 3 is vertically formed on the outer ring of the die frame 2 upwards, and the limiting edge 3 is 13 cm higher than the texture part; the difference between two adjacent sides of the die frame 2 is 3cm, and the die is placed into a groove 41 formed by inwards sinking the upper surface of a pressing table 4 of a forming machine when in use, so that the die is fixed on the forming machine.
Furthermore, the dosage of the hydrochloric acid in the hydrochloric acid solution is 80%, the balance is water, and the concentration of the hydrochloric acid is 98%. Example 2
A processing method of antique melamine tableware specifically comprises the following steps:
s1, preparing a die: the die is sequentially subjected to CNC computer routing and polishing treatment, after the polishing treatment, blue glue is used for smearing and covering a die part which does not need to be corroded to form a concave surface, a matte surface and a bright surface are distinguished on a plane, and after the covering is finished, exposed lines are corroded for 20min by using a hydrochloric acid solution, and then the lines are sunken; after the etching is finished, cleaning and electroplating are carried out after lines are formed, and after the electroplating is finished, polishing is carried out on the part covered with the blue gel, so that an obvious bright-fog alternate effect can be formed, wherein the bright surface is a convex part, and the fog surface is a concave part;
s2, preparing stained paper: performing stained paper design according to the specification of a mould and bright surface and matte surface lines, drying the designed and printed stained paper, preparing a liquid medicine by using gold powder and water at 100 ℃ to wipe the stained paper for the first time, preparing the liquid medicine by using the gold powder and the water at 70 ℃ again after drying to wipe the stained paper for the second time, and drying for later use;
s3, preheating a die: placing the mould on a forming machine, and preheating the mould processed in the step (1) by using the forming machine, wherein the preheating temperature of the mould is 165 ℃ and the temperature is kept;
s4, raw material compression molding: after the temperature of the upper and lower dies is stable, the standard materials for preparing melamine tableware are placed in a high frequency wave for preheating to soften the raw materials, the softened raw materials are put into the die positioned below the forming machine, and the die positioned above the forming machine is used for extruding the raw materials to prepare a preformed product; wherein the extrusion pressure of the raw material extruded by the die is 180 kgf/cm2The forming time is 50-s, the mold is opened in the forming process to remove gas generated by extruding the raw materials in the mold, and the air leakage time is 1 s;
s5, forming stained paper: positioning the dried standby stained paper along the frame of the mold, then pasting the stained paper on the surface of the preformed product formed by the first pressing, and performing the second pressing by using a forming machine to form the decal preformed product; wherein the secondary pressing is performed under a pressing pressure of 150 kgf/cm to form the decal preform2The forming time is 10s, and the air leakage time is 1 s;
s6, adding gold for forming: on appliqueAdding about 30g of gold powder on the surface of the preform, and pressing to obtain the final product, wherein the forming pressure is 180 kgf/cm2The forming time is 35s, and the air leakage time is 1 s; and finally, carrying out coarse grinding processing and trimming processing to obtain the antique melamine tableware.
Referring to fig. 1 and 2, the die comprises a texture part 1 and a die frame 2 arranged on the outer ring of the texture part 1 and extending outwards, the die frame 2 is octagonal, the lengths of eight sides are different, a limiting edge 3 is vertically formed on the outer ring of the die frame 2 upwards, and the limiting edge 3 is 15 cm higher than the texture part; the difference between two adjacent sides of the die frame 2 is 5cm, and the die is placed into a groove 41 formed by inwards sinking the upper surface of a pressing table 4 of a forming machine when in use, so that the die is fixed on the forming machine.
Furthermore, the dosage of the hydrochloric acid in the hydrochloric acid solution is 80%, the balance is water, and the concentration of the hydrochloric acid is 98%.
Example 3
A processing method of antique melamine tableware specifically comprises the following steps:
s1, preparing a die: the die is sequentially subjected to CNC computer routing and polishing treatment, after the polishing treatment, blue glue is used for smearing and covering a die part which does not need to be corroded to form a concave surface, a matte surface and a bright surface are distinguished on a plane, and after the covering is finished, exposed lines are corroded for 18min by using a hydrochloric acid solution to form depressions; after the etching is finished, cleaning and electroplating are carried out after lines are formed, and after the electroplating is finished, polishing is carried out on the part covered with the blue gel, so that an obvious bright-fog alternate effect can be formed, wherein the bright surface is a convex part, and the fog surface is a concave part;
s2, preparing stained paper: performing stained paper design according to the specification of a mould and bright surface and matte surface lines, drying the designed and printed stained paper, preparing a liquid medicine by using gold powder and water at 100 ℃ to wipe the stained paper for the first time, preparing the liquid medicine by using the gold powder and the water at 70 ℃ again after drying to wipe the stained paper for the second time, and drying for later use;
s3, preheating a die: placing the mould on a forming machine, and preheating the mould processed in the step (1) by using the forming machine, wherein the preheating temperature of the mould is 163 ℃ and the temperature is kept;
s4, raw material compression molding: after the temperature of the upper and lower dies is stable, the standard materials for preparing melamine tableware are placed in a high frequency wave for preheating to soften the raw materials, the softened raw materials are put into the die positioned below the forming machine, and the die positioned above the forming machine is used for extruding the raw materials to prepare a preformed product; wherein the extrusion pressure of the raw material extruded by the die is 160 kgf/cm2The molding time is 70s, the mold is opened to remove gas generated by extruding the raw material in the mold in the molding process, and the air leakage time is 2 s;
s5, forming stained paper: positioning the dried standby stained paper along the frame of the mold, then pasting the stained paper on the surface of the preformed product formed by the first pressing, and performing the second pressing by using a forming machine to form the decal preformed product; wherein the secondary pressing is performed under a pressing pressure of 170 kgf/cm to form the decal preform2The forming time is 9s, and the air leakage time is 1 s;
s6, adding gold for forming: pressing the surface of the applique preform with about 20g of gold powder to obtain the final product, wherein the forming pressure is 160 kgf/cm2The forming time is 30s, and the air leakage time is 2 s; and finally, carrying out coarse grinding processing and trimming processing to obtain the antique melamine tableware.
Referring to fig. 1 and 2, the die comprises a texture part 1 and a die frame 2 arranged on the outer ring of the texture part 1 and extending outwards, the die frame 2 is octagonal, the lengths of eight sides are different, a limiting edge 3 is vertically formed on the outer ring of the die frame 2 upwards, and the limiting edge 3 is 14 cm higher than the texture part; the difference between two adjacent sides of the die frame 2 is 4cm, and the die is placed into a groove 41 formed by inwards sinking the upper surface of a pressing table 4 of a forming machine when in use, so that the die is fixed on the forming machine.
Furthermore, the dosage of the hydrochloric acid in the hydrochloric acid solution is 80%, the balance is water, and the concentration of the hydrochloric acid is 98%.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.
Claims (8)
1. The processing method of the antique melamine tableware is characterized by comprising the following steps:
s1, preparing a die: the mold is subjected to CNC computer routing processing, polishing processing and division of a bright surface and a matte surface by using hydrochloric acid corrosion in sequence and then is electroplated to form a bright-fog alternate effect, wherein the bright surface is a convex part, and the matte surface is a concave part;
s2, preparing stained paper: performing stained paper design according to the specification of a mould and bright surface and matte surface lines, drying the designed and printed stained paper, preparing a liquid medicine by using gold powder and water at 100 ℃ to wipe the stained paper for the first time, preparing the liquid medicine by using the gold powder and the water at 70 ℃ again after drying to wipe the stained paper for the second time, and drying for later use;
s3, preheating a die: placing the mold on a forming machine, and preheating the mold processed in the step S1 by using the forming machine, wherein the preheating temperature of the mold is 160-165 ℃ and the temperature is kept;
s4, raw material compression molding: after the temperature of the mold is stable, preheating standard materials for preparing melamine tableware in high frequency to soften the raw materials, putting the softened raw materials into a lower mold of a forming machine, and extruding the raw materials by using an upper mold in the forming machine to prepare a preform;
s5, forming stained paper: positioning the dried standby stained paper along the frame of the mold, then pasting the stained paper on the surface of the preformed product formed by the first pressing, and performing the second pressing by using a forming machine to form the decal preformed product;
s6, adding gold for forming: adding about 10-30 g of gold powder on the surface of the applique preform, pressing into a finished product, and performing coarse grinding and trimming to obtain the antique melamine tableware.
2. The method of processing antique melamine tableware according to claim 1, wherein: the die comprises a grain part (1) and a die frame (2) arranged on the outer ring of the grain part (1) and extending outwards, wherein the die frame (2) is octagonal and has different eight-side lengths, a limiting edge (3) is vertically formed upwards on the outer ring of the die frame (2), and the limiting edge (3) is higher than the pattern part by 3-5 cm.
3. The method of processing antique melamine tableware according to claim 2, wherein: the difference between two adjacent sides of the die frame (2) is 3-5 cm.
4. The method of processing antique melamine tableware according to claim 1, wherein: in the step S1, the bright surface and the matte surface are divided by using a hydrochloric acid solution to corrode the mold, and the method specifically comprises the following steps:
a1, coating blue glue on a mould which does not need to be corroded to form a concave surface;
a2, after covering, corroding the exposed grains with a hydrochloric acid solution for 15-20 min to form depressions;
a3, cleaning after lines are formed by corrosion, then electroplating, and polishing the part covered with the blue gel after the electroplating is finished, so that the effect of alternate bright fog can be realized.
5. The method of processing antique melamine tableware according to claim 4, wherein: the dosage of the hydrochloric acid in the hydrochloric acid solution is 80 percent, the balance is water, and the concentration of the hydrochloric acid is 98 percent.
6. The method of processing antique melamine tableware according to claim 1, wherein: the extrusion pressure of the raw material extruded by the die in the step S4 is 150-180 kgf/cm2The forming time is 50-100 s, the mold is opened in the forming process to remove gas generated by extruding the raw materials in the mold, and the air leakage time is 1-2 s.
7. The method of processing antique melamine tableware according to claim 1, wherein: in the step S5, the secondary pressing of the forming machine is used for forming the applique preform, and the pressing pressure is 150-180 kgf/cm2The forming time is 8-10 s, and the air leakage time is 1 s.
8. The method of processing antique melamine tableware according to claim 1, wherein: in the step S6 gold-adding forming process, the forming pressure is 100-180 kgf/cm2The forming time is 25-35 s, and the air leakage time is 1-2 s.
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