阅读说明：本技术 一种仿古密胺餐具的加工方法 (Method for processing antique melamine tableware ) 是由 刘威 于 2019-11-15 设计创作，主要内容包括：本发明具体涉及一种仿古密胺餐具的加工方法,具体包括模具准备、花纸准备、模具预热、原料压制成型、花纸成型以及加金成型的过程；本发明中对模具进行加工处理,使得模具的亮雾效果明显、亮雾分界清晰,制得的产品效果更加美观,同时对贴花过程的使用到的花纸进行加工处理,使得花纸能够准确的复制到模具上,使得模具图案与花纸图案完全吻合,减少误差,达到仿古餐具的效果。(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.)

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.

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.

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.