阅读说明：本技术 一种具有渐变色密胺餐具的制备方法 (Preparation method of melamine tableware with gradient color ) 是由 严华 于 2021-09-28 设计创作，主要内容包括：本发明公开了一种具有渐变色密胺餐具的制备方法,涉及餐具加工领域；该制备方法包括以下步骤：1)成型预处理；2)初次压制成型；3)颜色渐变处理；4)最终压制；5)后处理对步骤4)获得密胺制品进行修边、打磨、抛光和检查处理后包装入库。本发明实施例中所提供的具有渐变色密胺餐具的制备方法,摒弃了传统的贴花工艺,采用了全新的方法来实现密胺餐具的渐变色处理,解决了花纸缺乏自然美感的问题,且不会受限于器型限制,同时避免了采用贴花工艺的密胺餐具长时间使用会有破花以及盛放重油菜品会使花纸变色的问题,保证产品的持久美观度；且使用本申请实施例中的制备方法能够免去花纸的使用,更为节能环保。(The invention discloses a preparation method of melamine tableware with gradient color, relating to the field of tableware processing; the preparation method comprises the following steps: 1) pre-processing for molding; 2) primary compression molding; 3) performing color gradient treatment; 4) finally pressing; 5) and (4) post-treatment, namely, trimming, grinding, polishing, inspecting the melamine product obtained in the step 4), and packaging and warehousing the product. The preparation method of the melamine tableware with the gradual change color provided by the embodiment of the invention abandons the traditional decal process, adopts a brand-new method to realize the gradual change color treatment of the melamine tableware, solves the problem that the stained paper lacks natural aesthetic feeling, is not limited by the shape of a machine, simultaneously avoids the problems that the melamine tableware adopting the decal process has flowers broken after being used for a long time and the stained paper is discolored when being used for containing heavy oil dishes, and ensures the lasting aesthetic degree of the product; the preparation method in the embodiment of the application can avoid the use of stained paper, and is more energy-saving and environment-friendly.)

1. The preparation method of melamine tableware with gradient color is characterized by comprising the following steps:

1) pretreatment for shaping

Preheating a mould and a melamine raw material;

2) initial press forming

Putting the preheated melamine raw material into a preheated mould, performing high-temperature reaction for 30-69 seconds, and performing compression molding to obtain a melamine primary product;

3) color gradation processing

3-1) preparation of colored light powder

Selecting a toner which has a color similar to that of the melamine primary product, mixing the toner with transparent powder, and uniformly stirring to obtain colored powder, wherein the mass percent of the transparent powder is 99.4-99.6%, and the mass percent of the toner is 0.4-0.6%;

3-2) spreading colored light powder on the outer surface of the melamine primary product;

3-3) pressing again for forming

After die assembly, performing high-temperature reaction for 30-60 seconds, and opening the die to obtain a melamine product with gradually changed color on the outer surface;

3-4) scattering colored light powder on the surface of the male die;

4) final press forming

After die assembly, performing high-temperature reaction for 30-60 seconds, and opening the die to obtain a melamine product with gradually changed colors on the inner surface and the outer surface;

5) post-treatment

And (4) trimming, grinding, polishing and inspecting the melamine product obtained in the step 4), and packaging and warehousing.

2. The method of claim 1, wherein the transparent powder is a mixture of formaldehyde, melamine and a curing agent.

3. The method of claim 1, wherein the colored light powder has a particle size of 40-100 mesh.

4. The method for preparing tableware with gradient melamine according to claim 1, wherein said compression molding is performed by hydroforming.

5. The method for preparing tableware with gradient melamine according to claim 1, wherein the step 3-2) is specifically as follows: after the mold is opened, placing a melamine primary product on a male mold, and spreading the colored light powder obtained in the step 3-1) on the outer surface of the primary product, wherein the spreading thickness of the colored light powder is determined according to the requirements of the color depth of the top, the middle and the bottom of the outer surface, the colored light powder is thick when the color is deep, the colored light powder is thin when the color is light, and the mold is closed after the colored light powder is spread.

6. The method for preparing tableware with gradient melamine according to claim 5, wherein the steps 3-4) are specifically as follows: after the mold is opened, placing the melamine product with the gradually changed color on the outer surface obtained in the step 3-3) into a female mold, and spreading the colored light powder on the outer surface of a male mold, wherein the spreading thickness of the colored light powder is determined according to the requirements of the color depth of the bottom, the middle and the upper part of the inner surface of the melamine product, the colored light powder is thick when the color is dark, the colored light powder is thin when the color is light, and after the colored light powder is spread, closing the mold.

7. The method for preparing tableware with gradient melamine according to claim 6, wherein said colored light powder is spread to a thickness of 0.05-0.3 mm.

Technical Field

The invention relates to the field of tableware processing, in particular to a preparation method of melamine tableware with a gradient color.

Background

At present, the surface texture effect of melamine tableware is mainly realized by a decal process. However, the decal process is complex, including procedures of decal printing, cutting, powder coating, drying, decal pressing and the like, and the decals are difficult to be formed by the complexity of the decal machine, so that some decals cannot achieve ideal effects or even cannot achieve the ideal effects. If the color of the surface of the model type is gradually changed, the effect presented by the decal process is stiff and unnatural. Particularly, the shape of the vessel has a concave-convex design, the displacement exists slightly when the stained paper is pasted, the gradual change pattern of the stained paper cannot accurately correspond to the concave-convex texture on the surface of the vessel shape, the natural and smooth color gradual change effect is difficult to present, and the delicacy and the attractiveness of the vessel are influenced. In addition, the manufacture of the stained paper is a consumption of natural resources, and if the use of the stained paper can be reduced, the natural environment can be protected.

Disclosure of Invention

The invention aims to provide a preparation method of melamine tableware with gradient color, and the preparation method is used for solving the problems.

In order to achieve the purpose, the invention provides the following technical scheme:

a preparation method of melamine tableware with gradient color comprises the following steps:

1) pretreatment for shaping

Preheating a mould and a melamine raw material;

2) initial press forming

Putting the preheated melamine raw material into a preheated mould, performing high-temperature reaction for 30-69 seconds, and performing compression molding to obtain a melamine primary product;

3) color gradation processing

3-1) preparation of colored light powder

Selecting a toner having a color similar to that of the melamine primary product (namely, a color adjacent to the melamine primary product within an angle of 90 degrees on a color wheel), mixing the toner with transparent powder, and uniformly stirring to obtain colored light powder, wherein the mass percent of the transparent powder is 99.4-99.6%, and the mass percent of the toner is 0.4-0.6%;

3-2) spreading colored light powder on the outer surface of the melamine primary product;

3-3) pressing again for forming

After die assembly, performing high-temperature reaction for 30-60 seconds, and opening the die to obtain a melamine product with gradually changed color on the outer surface;

3-4) scattering colored light powder on the surface of the male die;

4) final press forming

After die assembly, performing high-temperature reaction for 30-60 seconds, and opening the die to obtain a melamine product with gradually changed colors on the inner surface and the outer surface;

5) post-treatment

And (4) trimming, grinding, polishing and inspecting the melamine product obtained in the step 4), and packaging and warehousing.

On the basis of the technical scheme, the invention also provides the following optional technical scheme:

in a further aspect: the transparent light powder is a mixture of formaldehyde, melamine and a curing agent.

In a further aspect: the particle size of the colored light powder is 40-100 meshes.

In a further aspect: the compression molding adopts a hydraulic molding process.

In a further aspect: the step 3-2) is specifically as follows: after the mold is opened, placing a melamine primary product on a male mold, and spreading the colored light powder obtained in the step 3-1) on the outer surface of the primary product, wherein the spreading thickness of the colored light powder is determined according to the requirements of the color depth of the top, the middle and the bottom of the outer surface, the colored light powder is thick when the color is deep, the colored light powder is thin when the color is light, and the mold is closed after the colored light powder is spread.

In a further aspect: the step 3-4) is specifically as follows: after the mold is opened, placing the melamine product with the gradually changed color on the outer surface obtained in the step 3-3) into a female mold, and spreading the colored light powder on the outer surface of a male mold, wherein the spreading thickness of the colored light powder is determined according to the requirements of the color depth of the bottom, the middle and the upper part of the inner surface of the melamine product, the colored light powder is thick when the color is dark, the colored light powder is thin when the color is light, and after the colored light powder is spread, closing the mold.

In a further aspect: the spreading thickness of the colored light powder is 0.05-0.3 mm.

Compared with the prior art, the invention has the following beneficial effects:

the preparation method of the melamine tableware with the gradual change color provided by the embodiment of the invention abandons the traditional decal process, adopts a brand-new method to realize the gradual change color treatment of the melamine tableware, solves the problem that the stained paper lacks natural aesthetic feeling, is not limited by the shape of a machine, simultaneously avoids the problems that the melamine tableware adopting the decal process has flowers broken after being used for a long time and the stained paper is discolored when being used for containing heavy oil dishes, and ensures the lasting aesthetic degree of the product; the preparation method in the embodiment of the application omits a complicated decal process, shortens the production time and reduces the production cost; the preparation method in the embodiment of the application can avoid the use of stained paper, and is more energy-saving and environment-friendly.

Detailed Description

The examples are given solely for the purpose of illustration and are not intended to limit the scope of the invention. Any obvious modifications or variations can be made to the present invention without departing from the spirit or scope of the present invention.

Example 1

In one embodiment of the application, a method for preparing tableware with melamine with gradient color comprises the following steps:

1) pretreatment for shaping

Preheating a mould and a melamine raw material;

2) initial press forming

Placing the preheated melamine raw material into a preheated mould, performing high-temperature reaction for 30 seconds, and performing compression molding to obtain a melamine primary product;

3) color gradation processing

3-1) preparation of colored light powder

Selecting a toner having a color similar to that of the melamine primary product (namely, a color adjacent to the melamine primary product within an angle of 90 degrees on a color wheel), mixing the toner with transparent powder, and uniformly stirring to obtain colored light powder, wherein the mass percent of the transparent powder is 99.5%, and the mass percent of the toner is 0.5%;

3-2) spreading colored light powder on the outer surface of the melamine primary product, wherein the spreading thickness is 0.3 mm;

3-3) pressing again for forming

After die assembly, performing high-temperature reaction for 30 seconds, and opening the die to obtain a melamine product with gradually changed color on the outer surface;

3-4) spraying colored light powder on the surface of the male die, wherein the spraying thickness is 0.3 mm;

4) final press forming

After die assembly, performing high-temperature reaction for 30 seconds, and opening the die to obtain a melamine product with gradually changed colors on the inner surface and the outer surface;

5) post-treatment

And (4) trimming, grinding, polishing and inspecting the melamine product obtained in the step 4), and packaging and warehousing.

Wherein the step 3-2) is specifically as follows: after the mold is opened, placing a melamine primary product on a male mold, and spreading the colored light powder obtained in the step 3-1) on the outer surface of the primary product, wherein the spreading thickness of the colored light powder is determined according to the requirements of the color depth of the top, the middle and the bottom of the outer surface, the colored light powder is thick when the color is deep, the colored light powder is thin when the color is light, and the mold is closed after the colored light powder is spread.

Wherein the step 3-4) is specifically as follows: after the mold is opened, placing the melamine product with the gradually changed color on the outer surface obtained in the step 3-3) into a female mold, and spreading the colored light powder on the outer surface of a male mold, wherein the spreading thickness of the colored light powder is determined according to the requirements of the color depth of the bottom, the middle and the upper part of the inner surface of the melamine product, the colored light powder is thick when the color is dark, the colored light powder is thin when the color is light, and after the colored light powder is spread, closing the mold.

Example 2

In one embodiment of the application, a method for preparing tableware with melamine with gradient color comprises the following steps:

1) pretreatment for shaping

Preheating a mould and a melamine raw material;

2) initial press forming

Putting the preheated melamine raw material into a preheated mould, performing high-temperature reaction for 40 seconds, and performing compression molding to obtain a melamine primary product;

3) color gradation processing

3-1) preparation of colored light powder

Selecting a toner having a color similar to that of the melamine primary product (namely, a color adjacent to the melamine primary product within an angle of 90 degrees on a color wheel), mixing the toner with transparent powder, and uniformly stirring to obtain colored light powder, wherein the mass percent of the transparent powder is 99.4%, and the mass percent of the toner is 0.6%;

3-2) spreading colored light powder on the outer surface of the melamine primary product, wherein the spreading thickness is 0.15 mm;

3-3) pressing again for forming

After die assembly, performing high-temperature reaction for 35 seconds, and opening the die to obtain a melamine product with gradually changed color on the outer surface;

3-4) spraying colored light powder on the surface of the male die, wherein the spraying thickness is 0.15 mm;

4) final press forming

After die assembly, performing high-temperature reaction for 35 seconds, and opening the die to obtain a melamine product with gradually changed colors on the inner surface and the outer surface;

5) post-treatment

And (4) trimming, grinding, polishing and inspecting the melamine product obtained in the step 4), and packaging and warehousing.

Wherein the step 3-2) is specifically as follows: after the mold is opened, placing a melamine primary product on a male mold, and spreading the colored light powder obtained in the step 3-1) on the outer surface of the primary product, wherein the spreading thickness of the colored light powder is determined according to the requirements of the color depth of the top, the middle and the bottom of the outer surface, the colored light powder is thick when the color is deep, the colored light powder is thin when the color is light, and the mold is closed after the colored light powder is spread.

Wherein the step 3-4) is specifically as follows: after the mold is opened, placing the melamine product with the gradually changed color on the outer surface obtained in the step 3-3) into a female mold, and spreading the colored light powder on the outer surface of a male mold, wherein the spreading thickness of the colored light powder is determined according to the requirements of the color depth of the bottom, the middle and the upper part of the inner surface of the melamine product, the colored light powder is thick when the color is dark, the colored light powder is thin when the color is light, and after the colored light powder is spread, closing the mold.

Example 3

In one embodiment of the application, a method for preparing tableware with melamine with gradient color comprises the following steps:

1) pretreatment for shaping

Preheating a mould and a melamine raw material;

2) initial press forming

Putting the preheated melamine raw material into a preheated mould, performing high-temperature reaction for 69 seconds, and performing compression molding to obtain a melamine primary product;

3) color gradation processing

3-1) preparation of colored light powder

Selecting a toner having a color similar to that of the melamine primary product (namely, a color adjacent to the melamine primary product within an angle of 90 degrees on a color wheel), mixing the toner with transparent powder, and uniformly stirring to obtain colored light powder, wherein the mass percent of the transparent powder is 99.6%, and the mass percent of the toner is 0.4%;

3-2) spraying colored light powder on the outer surface of the melamine primary product, wherein the spraying thickness is 0.05 mm;

3-3) pressing again for forming

After die assembly, performing high-temperature reaction for 60 seconds, and opening the die to obtain a melamine product with gradually changed color on the outer surface;

3-4) spraying colored light powder on the surface of the male die, wherein the spraying thickness is 0.05 mm;

4) final press forming

After die assembly, performing high-temperature reaction for 60 seconds, and opening the die to obtain a melamine product with gradually changed colors on the inner surface and the outer surface;

5) post-treatment

And (4) trimming, grinding, polishing and inspecting the melamine product obtained in the step 4), and packaging and warehousing.

Wherein the step 3-2) is specifically as follows: after the mold is opened, placing a melamine primary product on a male mold, and spreading the colored light powder obtained in the step 3-1) on the outer surface of the primary product, wherein the spreading thickness of the colored light powder is determined according to the requirements of the color depth of the top, the middle and the bottom of the outer surface, the colored light powder is thick when the color is deep, the colored light powder is thin when the color is light, and the mold is closed after the colored light powder is spread.

Wherein the step 3-4) is specifically as follows: after the mold is opened, placing the melamine product with the gradually changed color on the outer surface obtained in the step 3-3) into a female mold, and spreading the colored light powder on the outer surface of a male mold, wherein the spreading thickness of the colored light powder is determined according to the requirements of the color depth of the bottom, the middle and the upper part of the inner surface of the melamine product, the colored light powder is thick when the color is dark, the colored light powder is thin when the color is light, and after the colored light powder is spread, closing the mold.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.