A method for step-by-step molding of multi-layer gradient melamine mahjong tiles

Abstract

This invention discloses a method for layer-by-layer step-by-step molding of multi-layer gradient melamine mahjong tiles, comprising the following steps: Step A, laying a base material into a mahjong tile mold with engraving, and preheating before molding to form a bottom substrate layer; Step B, preparing intermediate melamine mixed powders of different colors; Step C, laying the intermediate melamine mixed powders layer by layer on the bottom substrate layer, and after each layer of intermediate melamine mixed powder of the same color is laid, preheating before molding to finally form a gradient intermediate layer; Step D, laying high-gloss amine powder on the top surface of the gradient intermediate layer, and preheating before molding to form a decorative and wear-resistant layer; Step E, after overall pressure holding is completed, constant temperature cooling is performed to form the tile and demolding. The method of this invention is simple in steps. By layer-by-layer gradient color matching and layer-by-layer hot pressing fusion, gradient colors can be effectively processed, with natural and soft color transitions, presenting a smooth gradient effect, improving the overall structural quality, reducing processing costs, and increasing production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of multi-layer mahjong processing technology, specifically relating to a method for step-by-step molding of multi-layer gradient melamine mahjong tiles. Background Technology

[0002] Mahjong is a common recreational card game. Double-layered mahjong is a more aesthetically pleasing structure. Traditional mahjong manufacturing processes can only achieve one-time molding, and cannot achieve three-layer or multi-layer structures. The number of layers is fixed and cannot be adjusted, meaning that only solid colors or simple two-color designs can be produced, which is difficult to achieve the ideal aesthetic effect. Existing multi-layered mahjong technology involves cutting acrylic sheets and then gluing them together in multiple layers, which cannot form an effective whole. Moreover, the cost of cutting acrylic sheets is high, the process is relatively complex, the production cycle is long, and the production efficiency is low, making it impossible to meet the needs of large-scale, fast-paced mass production. Furthermore, during long-term use, the glued joints are prone to cracking or falling off, affecting durability. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-layer gradient melamine mahjong tile molding method, which aims to solve the technical shortcomings of existing technologies, such as low production efficiency and high cost.

[0004] The technical solution to achieve the purpose of this invention is a multi-layer gradient melamine mahjong tile molding method, comprising the following steps: Step A: Lay the base material into the mahjong mold with engraving, and then preheat and mold it to form the bottom substrate layer; Step B: Prepare intermediate melamine powders of different colors; Step C: Lay the intermediate melamine mixed powder layer by layer on the bottom substrate layer, and after each layer of intermediate melamine mixed powder of the same color is laid, it is preheated and then molded. Then lay the intermediate melamine mixed powder of other colors to finally form a gradient intermediate layer. Step D: Lay high-gloss amine powder material on the top surface of the gradient intermediate layer, and mold it into a decorative wear-resistant layer after preheating; Step E: After the overall pressure holding is completed, cool and mold at a constant temperature and then demold.

[0005] A further preferred embodiment is that, in step B, the intermediate melamine mixed powder is formed by adding color powder and pearlescent powder to melamine powder.

[0006] A further preferred embodiment is that the intermediate melamine mixed powder has at least two colors.

[0007] A further preferred embodiment is that in step A, the preheating temperature is 150-155℃, the molding pressure is 25-30MPa, and the time is 2.5-3min.

[0008] A further preferred embodiment is that in step C, the preheating temperature is 148-153℃, the molding pressure is 23-28MPa, and the time is 1-2min.

[0009] A further preferred embodiment is that in step D, the preheating temperature is 140-145℃, the molding pressure is 20-25MPa, and the time is 1.5-2min.

[0010] A further preferred embodiment is that, in step A, the substrate material is melamine powder; In step B, the melamine powder is melamine powder.

[0011] A further preferred embodiment is that magnets and counterweight fillers are pre-embedded in any one or more color layers of the gradient intermediate layer.

[0012] Compared with the prior art, the present invention has the following positive effects: The method of the present invention is simple. It can effectively process gradient colors by layer-by-layer gradient color matching and layer-by-layer hot pressing and fusion. The color transition is natural and soft, presenting a smooth gradient effect. At the same time, it does not require glue splicing, and there will be no glue separation, delamination or edge curling. It improves the quality of the overall structure and also helps to reduce processing costs and improve production efficiency, solving the technical shortcomings of low production efficiency and high cost in the prior art. Attached Figure Description

[0013] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein: Figure 1 This is a schematic diagram of the processing method steps of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the mahjong set of the present invention; Figure 3 This is a schematic diagram of the molding operation process of the present invention.

[0014] Figure reference numerals: 1. Substrate layer, 2. Gradient intermediate layer, 3. Decorative wear-resistant layer, 4. Magnet. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0016] See Figure 1 , Figure 2 and Figure 3 As shown, a method for layer-by-layer step-by-step molding of multi-layer gradient melamine mahjong tiles includes the following steps: Step A: Lay a base material into a mahjong mold with engraving, preheat it, and then mold it to form the bottom substrate layer 1; in Step A, the preheating temperature is 150-155℃, the molding pressure is 25-30MPa, and the time is 2.5-3min. In Step A, the base material is melamine powder; Step B: Prepare intermediate melamine mixed powders of different colors; in Step B, the intermediate melamine mixed powders are prepared by adding color powder and pearlescent powder to melamine powder. The intermediate melamine mixed powders have at least two colors. In Step B, the melamine powder is melamine powder.

[0017] Step C: The intermediate melamine mixed powder is laid layer by layer on the bottom substrate layer, and after each layer of intermediate melamine mixed powder of the same color is laid, it is preheated and then molded. Then, intermediate melamine mixed powder of other colors is laid to finally form the gradient intermediate layer 2. In step C, the preheating temperature is 148-153℃, the molding pressure is 23-28MPa, and the time is 1-2min.

[0018] Step D: A high-gloss amine powder material is laid on the top surface of the gradient intermediate layer, and after preheating, it is molded into a decorative wear-resistant layer 3; in step D, the preheating temperature is 140-145℃, the molding pressure is 20-25MPa, and the time is 1.5-2min.

[0019] Step E: After the overall pressure holding is completed, the material is cooled and molded at a constant temperature and then demolded. The gradient intermediate layer can be made into three, four, or more layers as needed to meet different usage requirements.

[0020] Magnets 4 and counterweight fillers are pre-embedded in any one or more color layers of the gradient intermediate layer.

[0021] In actual operation, such as Figure 3 As shown, during installation, first place the lettering mold on the machine base for positioning; Next, place the base mold on the lettering mold, and then place a fixing frame on the lettering mold; Place the melamine powder mixture into the bottom mold and distribute it evenly; The melamine powder mixture is pressed into the bottom mold using a mold, with a preheating temperature of 150-155℃, a molding pressure of 25-30MPa, and a molding time of 2.5-3min. Place the pressed bottom mold on the machine table, and use the demolding fixture to send it into the machine table to remove edge waste; The intermediate melamine mixture powder is placed into the mold and evenly separated. It is then pressed into the mold using a compression mold. The preheating temperature is 148-153℃, the compression pressure is 23-28MPa, and the time is 1-2 minutes. Different colored intermediate melamine mixture powders can be pressed in as needed to form different color layers. After pressing, a magnet is placed in a fixture, followed by the filler material. Place the high-gloss amine powder material into the mold and spread it evenly. Then press it into the mold through a compression mold. The preheating temperature is 140-145℃, the compression pressure is 20-25MPa, and the time is 1.5-2min. After holding the coating for 1-2 minutes, cool and demold, then polish and apply ink on the conveyor belt.

[0022] Compared with the prior art, the present invention has the following positive effects: The method of the present invention is simple. It can effectively process gradient colors by layer-by-layer gradient color matching and layer-by-layer hot pressing and fusion. The color transition is natural and soft, presenting a smooth gradient effect. At the same time, it does not require glue splicing, and there will be no glue separation, delamination or edge curling. It improves the quality of the overall structure and also helps to reduce processing costs and improve production efficiency, solving the technical shortcomings of low production efficiency and high cost in the prior art.

[0023] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural parts described in the instruction manual can also be processed without any doubt based on existing technical common sense. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0024] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, these obvious variations or modifications derived from the essential spirit of the present invention still fall within the scope of protection of the present invention.

Claims

1. A method for layer-by-layer step-by-step molding of multi-layer gradient melamine mahjong tiles, characterized in that: Includes the following steps: Step A: Lay the base material into the mahjong mold with engraving, and then preheat and mold it to form the bottom substrate layer; Step B: Prepare intermediate melamine powders of different colors; Step C: Lay the intermediate melamine mixed powder layer by layer on the bottom substrate layer, and after each layer of intermediate melamine mixed powder of the same color is laid, it is preheated and then molded. Then lay the intermediate melamine mixed powder of other colors to finally form a gradient intermediate layer. Step D: Lay high-gloss amine powder material on the top surface of the gradient intermediate layer, and mold it into a decorative wear-resistant layer after preheating; Step E: After the overall pressure holding is completed, cool and mold at a constant temperature and then demold.

2. The method for layer-by-layer step-by-step molding of multi-layer gradient melamine mahjong tiles according to claim 1, characterized in that: In step B, the intermediate melamine mixed powder is made by adding color powder and pearlescent powder to melamine powder.

3. The method for layer-by-layer step-by-step molding of multi-layer gradient melamine mahjong tiles according to claim 1, characterized in that: The intermediate melamine mixed powder has at least two colors.

4. The method for layer-by-layer step-by-step molding of multi-layer gradient melamine mahjong tiles according to claim 1, characterized in that: In step A, the preheating temperature is 150-155℃, the molding pressure is 25-30MPa, and the time is 2.5-3min.

5. The method for layer-by-layer step-by-step molding of multi-layer gradient melamine mahjong tiles according to claim 1, characterized in that: In step C, the preheating temperature is 148-153℃, the molding pressure is 23-28MPa, and the time is 1-2min.

6. The method for layer-by-layer step-by-step molding of multi-layer gradient melamine mahjong tiles according to claim 1, characterized in that: In step D, the preheating temperature is 140-145℃, the molding pressure is 20-25MPa, and the time is 1.5-2min.

7. The method for layer-by-layer step-by-step molding of multi-layer gradient melamine mahjong tiles according to claim 2, characterized in that: In step A, the substrate material is melamine powder; In step B, the melamine powder is melamine powder.

8. The method for layer-by-layer step-by-step molding of multi-layer gradient melamine mahjong tiles according to claim 1, characterized in that: Magnets and counterweight fillers are embedded in any one or more color layers of the gradient intermediate layer.

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