A method of coloring a simulated multi-feature transparent silicate article

Abstract

The application discloses a coloring method for a molded multi-feature transparent silicate product, and comprises the following steps: step one, silicate powder preparation; step two, binder powder preparation; step three, preparation of a feeding precursor; the silicate powder in the step one is mixed with the binder powder in the step two according to a certain volume ratio; step four, mixing; the feeding precursor in the step three is put into a mixing machine cavity, and the feeding precursor is made into a feeding block; step five, forming; and the coloring step is further included, which is used for coloring the molded multi-feature transparent silicate product. The application has the following advantages and effects: the coloring of the molded multi-feature transparent silicate product is realized.

Description

Technical Field

[0001] This invention relates to the field of chemical processing, and in particular to a coloring method for molding multi-feature transparent silicate products. Background Technology

[0002] Since ancient times, silicate materials have been used as transparent containers (bottles, jars, bowls, plates) or shielding materials (windows, doors, partitions) in folk use. They are inexpensive and readily available, and have been widely used in various containers for other solid, liquid, and even gaseous substances. They can even help isolate these substances. We often see transparent silicate containers in food cans, such as wine bottles and pickled foods. Transparent silicates provide direct visual observation for humans, making it very easy to distinguish the state of the contents.

[0003] By adding different metal impurities or oxides to transparent silicate products and then controlling the high-temperature atmosphere of subsequent melting, transparent silicate products with different colors can be produced. This method can also be used to create silicate base colorants such as glazes for color matching, which can be used to color metal or ceramic utensils.

[0004] Therefore, the focus of this invention is how to apply color to the surface in a regular and efficient manner in the molding of multi-feature transparent silicate products. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a coloring method for molding multi-feature transparent silicate products, so as to complete the coloring of multi-feature transparent silicate products.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a coloring method for molding multi-feature transparent silicate articles, comprising the following steps:

[0007] Step 1: Preparation of silicate powder: Select silicate powder with a particle size of 0.5-60μm;

[0008] Step 2: Preparation of binder powder: including lubricant and activator, skeleton agent, powder entrainer, toughening grafting agent. Mix the above raw materials and then crush them using a pulverizer.

[0009] Step 3, Preparation of feed precursor: Mix the silicate powder from Step 1 with the binder powder from Step 2 at a certain volume ratio;

[0010] Step 4, Mixing: Place the feed precursor from Step 3 into the mixing chamber and form the feed precursor into feed lumps;

[0011] Step 5, Molding: The feed material made of silicate mixture is heated and pressured to liquefy it using pressure extrusion molding and injected into a mold cavity. After cooling and solidification, the molded blank is removed.

[0012] It also includes a coloring step for coloring molded multi-feature transparent silicate products.

[0013] The present invention is further configured such that: the coloring step is to add colored silicate particles with a volume ratio of 0.1-50% to the silicate powder in step one.

[0014] The present invention is further configured such that: a plurality of grooves are provided on the shaped gray blank, and a plurality of colored silicate inserts are inlaid in the grooves.

[0015] The present invention is further configured such that: the coloring step is performed by printing or spraying, diluting the colored silicate coating and then coloring the surface of the multi-feature transparent silicate blank.

[0016] The present invention is further configured such that the particle size of the colored silicate particles is between 0.5 and 60 μm.

[0017] The present invention is further configured such that: the lubricant and activator in step two is one or more of stearic acid, paraffin wax, microcrystalline wax, Fischer-Tropsch wax, polyethylene wax, ethylene bis-stearamide, and pentaerythritol stearate; the powder entrainer is copolyoxymethylene; the skeleton agent is one or more of polyethylene and polypropylene; and the toughening grafting agent is one or more of ethylene-vinyl acetate copolymer and butadiene rubber.

[0018] The present invention is further configured such that the weight ratio of the lubricant and activator is 0.2-20%;

[0019] The powder entrainer accounts for 60-93% by weight;

[0020] The weight percentage of the skeleton agent is 3-25%;

[0021] The toughening grafting agent accounts for 0.5-10% by weight.

[0022] The present invention is further configured such that the volume ratio of the silicate powder to the binder is (2-1):1.

[0023] The present invention is further configured such that step four specifically includes steps such as preheating the feed precursor, heating the feed precursor, accelerating the stirring of the feed, and cooling the feed, wherein the preheating temperature is 110℃, the holding time is 20-40 minutes, and the stirring speed is 3-5 RPM.

[0024] The invention is further configured as follows: when the feed precursor is heated to 170°C, the movement state of the pressure hammer is observed for every 1°C increase. The pressure hammer maintains up-and-down undulating motion. This step is repeated until the temperature reaches 180°C. The stirring speed in the feeding acceleration stirring step is 20-40 RPM, and the stirring time is 20-40 minutes. In the feeding cooling step, the stirring speed is reduced to 3-5 RPM, and the mixing operation is completed after the temperature drops to 165°C.

[0025] Compared with the prior art, the beneficial effects of the present invention are: it can color the entire multi-feature transparent silicate blank, or it can color the part of the multi-feature transparent silicate blank by inlaying, so that several local features have specific colors, and it can also color the surface locally or entirely. Attached Figure Description

[0026] Figure 1 This is one of the flowcharts of the coloring method of the present invention;

[0027] Figure 2 This is the second flowchart of the coloring method of the present invention. Detailed Implementation

[0028] The technical solutions described in this invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Obviously, the embodiments described in this specification are only some feasible technical solutions of this invention. Other embodiments obtained by those skilled in the art based on the embodiments of this invention without any creative effort should be considered to fall within the scope of protection of this invention.

[0029] A method for coloring molded multi-feature transparent silicate articles includes the following steps:

[0030] Step 1: Preparation of silicate powder: Select silicate powder with a particle size of 0.5-60μm;

[0031] Step 2: Preparation of binder powder: This includes lubricant and activator, skeleton agent, and powder entrainer. After mixing the above raw materials, use a pulverizer to pulverize them so that the particle size reaches between 10-30μm.

[0032] Step 3, Preparation of feed precursor: Mix the silicate powder from Step 1 with the binder powder from Step 2 at a certain volume ratio;

[0033] Step 4, Mixing: Place the feed precursor from Step 3 into the mixing chamber and form the feed precursor into feed lumps;

[0034] Step 5, Molding: The feed material made of silicate mixture is heated and pressured to liquefy it using pressure extrusion molding and injected into a mold cavity. After cooling and solidification, the molded blank is removed.

[0035] It also includes a coloring step for coloring molded multi-feature transparent silicate products.

[0036] In step one, the silicate powder used is commercially available conventional silicate powder. The powder shape should preferably be equiaxed, including spherical and irregular shapes. Specifically, the sources of silicate powder include, but are not limited to:

[0037] Various transparent and opaque silicate materials, as well as materials of different colors and with added inorganic powders;

[0038] Silicate sheet materials and their scraps;

[0039] Defective or scrapped products from the manufacturing process of conventional silicate products;

[0040] Recycled materials from commercial silicate products, etc.

[0041] The binder powder used in step two also uses commercially available conventional polymer materials;

[0042] In step three, the ratio of silicate powder and binder powder is calculated, weighed, and mixed according to Archimedes' principle, and then put into a premixer for mixing to form a feed precursor.

[0043] Furthermore, in the components of the adhesive powder in step two, the lubricant and activator are specifically one or more of stearic acid, paraffin wax, microcrystalline wax, Fischer-Tropsch wax, polyethylene wax, ethylene bis-stearamide, and pentaerythritol stearate; the softening temperature range of the above lubricant and activator is between 50-120°C. In the technical solution of this application, its main function is to fill the pores and wet the surface of the silicate powder, thereby enabling it to bond with other adhesives.

[0044] Furthermore, the powder entrainer is copolymerized polyoxymethylene, i.e., polyoxymethylene plastic, with a softening temperature range of 160-170℃. In the technical solution of this application, its main function is to coat the powder and carry the powder along with it during the feeding and melting process.

[0045] Furthermore, the skeleton agent is one or more of polyethylene and polypropylene, with a softening temperature range of 140-160℃. Its main function is to support the powder-molded preform during the process of 25-600℃.

[0046] Furthermore, in the technical solution of this application, the lubricant and activator also includes a toughening grafting agent, specifically one or more of ethylene-vinyl acetate copolymer and butadiene rubber. Its main function is to assist in the mutual solubility of the powder entrainer and the skeleton agent, and to make the blank elastic so as not to crack when it leaves the mold.

[0047] Furthermore, the weight percentage of lubricant and activator is 0.2-20%;

[0048] The weight percentage of the powder entrainer is 60-93%;

[0049] The weight percentage of the matrix agent is 3-25%;

[0050] The toughening grafting agent accounts for 0.5-10% by weight.

[0051] Furthermore, in step four, the mixing equipment is a common commercially available mixing equipment, including a pressure hammer driven by an adjustable reciprocating servo cylinder and a U-shaped mixing chamber. Several heating tubes are installed in the U-shaped mixing chamber for heating. A mixing space is formed between the pressure hammer and the U-shaped mixing chamber, with a certain exhaust gap. Several spiral rotors are also installed in the mixing space for stirring.

[0052] Furthermore, the mixing process includes the following steps:

[0053] (1) Preheating of feed precursors: The temperature gradually rises to about 110℃ and the preheating time is 20-40 minutes. The stirring speed is 3-5 RPM and the pressure hammer does not press down during this stage.

[0054] The preheating stage of the feed precursor is mainly to remove the moisture in the feed precursor. The heating of the mixing chamber and slow stirring allow the moisture in the various raw materials to be discharged smoothly. At the same time, the pressure hammer does not press down during this stage, which also ensures that the various raw materials have enough space to be heated and stirred.

[0055] (2) Heating of feed precursor: In this stage, the temperature is further heated to 170°C, so that the feed precursor can absorb heat and heat up. At the same time, the pressure hammer begins to press down to help remove the air and moisture contained in the precursor. At this time, the speed is still 3-5 RPM, which can be slightly reduced compared to the preheating stage. The slight reduction in speed is mainly to prevent powder from splashing and leaking.

[0056] (3) Fine adjustment of the temperature of the feed precursor: 170℃ is the temperature at which polyoxymethylene begins to melt into mud. Therefore, after the temperature reaches 170℃, in order to avoid excessive high temperature causing the polyoxymethylene to vaporize and decompose, the movement state of the pressure hammer is observed for every 1℃ increase until it increases by another 1℃. This step is repeated until the temperature reaches 180℃.

[0057] (4) Observe whether the feed forms clumps: By observing whether the hammer moves up and down, determine that the temperature has continued to increase until the hammer has moved up and down. When the hammer is raised, sort out the material in the mixing chamber and clean the powder that overflows around the chamber.

[0058] (5) Accelerate feeding and mixing: Maintain the agglomeration temperature and press the hammer down onto the feed agglomeration, increase the rotor speed to 20-40 RPM and maintain it for 20-40 minutes to ensure that all materials are mixed so that the silicate feed is uniform;

[0059] (6) Feeding and cooling: Stop the heater and keep the hammer pressing down. Adjust the rotor speed to 3-5 RPM and wait for the temperature to drop to 165℃ to complete the feeding and mixing operation.

[0060] (7) Stop the equipment and remove the feed clumps.

[0061] Furthermore, it also includes a granulation step, where the appropriately cooled feed agglomerates are extruded and cut into small particles or powder for subsequent molding. It is not recommended to use a crusher here, as it can easily lead to uneven particle size and excessively fine particles, resulting in feed loss.

[0062] In the molding process, pressure extrusion molding methods include, but are not limited to, pressing, extrusion and injection molding. The resulting blank has multiple features in multiple directions and includes mortise and tenon structures such as woodworking interlocking and mating flanges. In other words, the resulting blank is a multi-feature silicate blank.

[0063] One method of coloring is to add a small amount of colored silicate particles during the initial feeding process. The particle size ranges from 0.5 to 60 μm, and the volume ratio of these particles to conventional silicate powder particles is 0.1% to 50%. Through the uniform distribution of colored silicate particles, the color of the originally transparent and colorless sintered silicate products can be changed. The larger the proportion of colored silicate particles, the more obvious the color.

[0064] The second coloring method involves injection molding several small colored silicate inserts with distinctive features, and then inserting them into the corresponding positions of the aforementioned multi-feature transparent silicate blank, thereby achieving diverse features and color inlays at different positions. Similarly, the small colored silicate inserts can also become the main combined features on the multi-feature silicate blank. For example, by using the aforementioned molding method to produce colored silicate insert blanks, the corresponding shapes and colors can be changed according to actual needs to meet the final product appearance requirements. Even the design of the shape can incorporate functional requirements, such as handles, hooks, and other structures, to increase the application scenarios of colored silicate products.

[0065] The third coloring method is to use printing or spraying. After diluting the colored silicate coating, the surface of the multi-feature transparent silicate blank is partially or completely printed or coated. The coating is also made of fine colored silicate particles. Printing includes pad printing, screen printing, and decorative patterns can also be completed by manual drawing and spraying.

[0066] After coloring and assembly, the multi-feature transparent silicate blank is degreased and then cured at high temperature, followed by sintering to obtain the final multi-feature transparent silicate product with various colors. Degreasing aims to remove the binder from the blank; the degreasing method can be suitable for different binder formulations, including thermal degreasing, catalytic degreasing, solvent degreasing, and combined degreasing operations.

[0067] The above description is only a preferred embodiment of the present invention. In addition, the application field of the present invention is not limited to molding processes, but can also be applied to other non-molding processes. For example, multi-feature silicate products made by powder 3D printing can also use the solution of the present invention to eliminate pores. It should be noted that for those skilled in the art, several improvements and additions can be made without departing from the method of the present invention, and these improvements and additions should also be considered within the scope of protection of the present invention.

Claims

1. A method of coloring a simulated multi-feature transparent silicate article, characterized by, It comprises the following steps: Step one, silicate powder preparation: select the powder particle size of 0.5-60 μm silicate powder; Step two, binder powder preparation: including lubrication and activator, skeleton agent, powder carrier agent, toughening grafting agent, after mixing the above raw materials, use the pulverizer to crush; Step three, feed precursor preparation: mix the silicate powder in step one with the binder powder in step two according to the volume ratio of (2-1):1; Step four, mixing: put the feed precursor in step three into the mixing chamber, and make the feed precursor into a feed block; Step five, forming: adopt pressure extrusion molding method to the silicate mixture, and make it liquefy and inject into a mold cavity, after cooling and setting, take out the shaped product; It also includes coloring step, for coloring the molded multi-feature transparent silicate product, the coloring step is to add 0.1-50% colored silicate particles in the silicate powder of step one; The lubrication and activator in step two is one or more of stearic acid, paraffin, microcrystalline wax, fischer-tropsch wax, polyethylene wax, ethylene bis-stearamide, pentaerythritol stearate, the powder carrier agent is copolyformaldehyde, the skeleton agent is one or more of polyethylene and polypropylene, the toughening grafting agent is one or more of ethylene-vinyl acetate copolymer and butadiene rubber; The weight percentage of the lubrication and activator is 0.2-20%; The weight percentage of the powder carrier agent is 60-93%; The weight percentage of the skeleton agent is 3-25%; The weight percentage of the toughening grafting agent is 0.5-10%; The softening temperature range of the lubrication and activator is 50-120℃; The softening temperature range of the powder carrier agent is 160-170℃; The softening temperature range of the skeleton agent is 140-160℃.

2. The method of coloring a fabricated multi-featured transparent silicate article according to claim 1, characterized in that: The shaped product is also provided with a plurality of grooves, and a plurality of colored silicate inserts are embedded in the grooves.

3. The method of coloring a fabricated multi-featured transparent silicate article according to claim 1, characterized in that: The coloring step is to dilute the colored silicate paint and color the surface of the multi-feature transparent silicate product by printing or spraying.

4. The method of coloring a fabricated multi-featured transparent silicate article according to claim 1, characterized in that: The particle size of the colored silicate particles is between 0.5-60 μm.

5. The method of coloring a fabricated multi-featured transparent silicate article according to claim 1, characterized in that: The step four also specifically includes the steps of preheating the feed precursor, heating the feed precursor, accelerating the stirring of the feed, and cooling the feed, wherein the preheating temperature is 110℃, the holding time is 20-40 minutes, and the stirring speed is 3-5 RPM.

6. The method of coloring a fabricated multi-featured transparent silicate article according to claim 5, characterized in that: When the feed precursor is heated to 170℃, the movement state of the press hammer is observed every time the temperature increases by 1℃, the press hammer keeps up and down movement, and the step is repeated until the temperature rises to 180℃; the stirring speed of the accelerating stirring step is 20-40 RPM, and the stirring time is 20-40 minutes; in the cooling step, the stirring speed is reduced to 3-5 RPM, and the mixing operation is completed after the temperature is reduced to 165℃.

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