阅读说明：本技术 在3c产品的覆膜方法和膜片 (Film coating method and film sheet for 3C product ) 是由 杨柳 周亮 于 2020-12-31 设计创作，主要内容包括：本发明公开一种在3C产品的覆膜方法和膜片,其中,在3C产品的覆膜方法包括以下步骤：将初始膜片加热至预设温度以软化所述初始膜片,所述预设温度大于或等于120°,小于或等于160°；将软化后的初始膜片包覆于吸塑模具并施加负压,冷却所述吸塑模具上的初始膜片以得到成型的中间膜片；根据预设的切削方式切割所述中间膜片以得到目标膜片；将目标膜片嵌入注塑模具的公模型腔腔壁、或母模型腔腔壁中的任一者,以固定所述目标膜片；将所述注塑模具合模并注塑以得到所需的初始产品。本发明技术方案能够运用在具有较大拉伸曲面的3C产品上,与传统的喷漆和IML工艺相比,本设计在3C产品领域中,具有更加广泛的运用范围。(The invention discloses a film coating method and a film sheet for a 3C product, wherein the film coating method for the 3C product comprises the following steps: heating an initial membrane to a preset temperature to soften the initial membrane, wherein the preset temperature is greater than or equal to 120 degrees and less than or equal to 160 degrees; coating the softened initial membrane on a plastic suction mould, applying negative pressure, and cooling the initial membrane on the plastic suction mould to obtain a formed intermediate membrane; cutting the intermediate membrane according to a preset cutting mode to obtain a target membrane; embedding a target membrane into any one of the cavity wall of a male mold cavity or the cavity wall of a female mold cavity of an injection mold to fix the target membrane; and closing the injection mold and performing injection molding to obtain the required initial product. The technical scheme of the invention can be applied to 3C products with larger stretching curved surfaces, and compared with the traditional paint spraying and IML (in-mold labeling) process, the design has wider application range in the field of 3C products.)

1. A method of laminating a 3C product, comprising the steps of:

heating an initial membrane to a preset temperature to soften the initial membrane, wherein the preset temperature is greater than or equal to 120 degrees and less than or equal to 160 degrees;

coating the softened initial membrane on a plastic suction mould, applying negative pressure, and cooling the initial membrane on the plastic suction mould to obtain a formed intermediate membrane;

cutting the intermediate membrane according to a preset cutting mode to obtain a target membrane;

embedding a target diaphragm into any one of the cavity wall of a male mold cavity and the cavity wall of a female mold cavity of an injection mold to fix the target diaphragm;

and closing the injection mold and performing injection molding to obtain the required initial product.

2. A method of laminating a 3C product according to claim 1, including the steps of, prior to heating the initial film sheet:

and comparing the shape of the coiled membrane with that of the plastic suction model, and then cutting to obtain the initial membrane.

3. A method of laminating a 3C product according to claim 1, wherein the step of wrapping the initial film sheet around the blister mold comprises the steps of:

and carrying out vacuum treatment on the gap between the initial membrane and the plastic suction mould so as to form air pressure difference on two sides of the initial membrane.

4. A method for coating a film on a 3C product according to claim 1, wherein the intermediate film is subjected to any one of water cutting, laser cutting or cutter cutting to obtain the target film.

5. A method of laminating a 3C product according to claim 1, wherein after obtaining the target film sheet, the method comprises the steps of:

and fixing the male die or the female die, assembling a film conveying machine and the target membrane, and transferring and fixing the target membrane into a male die cavity or a female die cavity.

6. A method of laminating a 3C product according to claim 1, wherein after obtaining the initial product, the method comprises the steps of:

opening the mold to take out the initial product and carrying out quality detection on the initial product so as to obtain a qualified product by screening.

7. A method of laminating a 3C product according to claim 6, wherein after obtaining said acceptable product, the method comprises the steps of:

and grinding burrs of the qualified products to obtain target products, packaging the target products, conveying and storing the target products in a warehouse.

8. A film used in the method of laminating a 3C product according to any one of claims 1 to 8.

Technical Field

The invention relates to the technical field of 3C product film coating, in particular to a film coating method and a film for a 3C product.

Background

For the surface coating of products in the 3C industry, common processes include paint spraying and IML processes, but both can only achieve a monochromatic surface effect and can only be applied to stretching a relatively small plane or arc surface, and in view of this, a new coating process is needed for the products in the 3C industry.

Disclosure of Invention

The invention mainly aims to provide a film coating method for a 3C product, which aims to be applied to the 3C product with a larger stretching curved surface and improve the applicability of the process.

In order to achieve the above purpose, the film coating method for 3C products provided by the present invention comprises the following steps:

heating an initial membrane to a preset temperature to soften the initial membrane, wherein the preset temperature is greater than or equal to 120 degrees and less than or equal to 160 degrees;

coating the softened initial membrane on a plastic suction mould, applying negative pressure, and cooling the initial membrane on the plastic suction mould to obtain a formed intermediate membrane;

cutting the intermediate membrane according to a preset cutting mode to obtain a target membrane;

embedding a target diaphragm into any one of the cavity wall of a male mold cavity and the cavity wall of a female mold cavity of an injection mold to fix the target diaphragm;

and closing the injection mold and performing injection molding to obtain the required initial product.

Optionally, before heating the initial membrane sheet, the following steps are included:

and comparing the shape of the coiled membrane with that of the plastic suction model, and then cutting to obtain the initial membrane.

Optionally, after the initial film is wrapped in the plastic suction mold, the method includes the following steps:

and carrying out vacuum treatment on the gap between the initial membrane and the plastic suction mould so as to form air pressure difference on two sides of the initial membrane.

Optionally, the intermediate membrane is processed by any one of cutting processes of water cutting, laser cutting or cutter cutting, so as to obtain the target membrane.

Optionally, after obtaining the target diaphragm, the method includes the following steps:

and fixing the male die or the female die, assembling a film conveying machine and the target membrane, and transferring and fixing the target membrane into a male die cavity or a female die cavity.

Optionally, after obtaining the initial product, the method comprises the following steps:

opening the mold to take out the initial product and carrying out quality detection on the initial product so as to obtain a qualified product by screening.

Optionally, after obtaining the qualified product, the method comprises the following steps:

and grinding burrs of the qualified products to obtain target products, packaging the target products, conveying and storing the target products in a warehouse.

The invention also provides a membrane, which is applied to a membrane covering method of a 3C product, and the membrane covering method of the 3C product comprises the following steps:

heating an initial membrane to a preset temperature to soften the initial membrane, wherein the preset temperature is greater than or equal to 120 degrees and less than or equal to 160 degrees;

coating the softened initial membrane on a plastic suction mould, applying negative pressure, and cooling the initial membrane on the plastic suction mould to obtain a formed intermediate membrane;

cutting the intermediate membrane according to a preset cutting mode to obtain a target membrane;

embedding a target membrane into any one of the cavity wall of a male mold cavity or the cavity wall of a female mold cavity of an injection mold to fix the target membrane;

and closing the injection mold and performing injection molding to obtain the required initial product.

The technical proposal of the invention heats and softens the initial film used for decorating the 3C product, so as to be convenient for pressing the plastic film to make the plastic film attached to the plastic suction mould with a larger stretching curved surface, and through a preset cutting mode, cutting and polishing the initial diaphragm after high-pressure forming to obtain a target diaphragm with the same shape as the outer surface of the 3C product to be processed, then, the film coating process of the 3C product to be processed is realized through the operations of fixing the target membrane by the injection mold, injecting molten plastic into the target membrane and the like, compared with the mode of performing surface film coating on the 3C product by spray painting and IML in the prior art, the designed process method can be applied to the 3C product with a larger stretching curved surface, the application range is wider, and the surface decoration effect and the three-dimensional texture effect of the product are further improved through the decoration patterns of the pattern layer in the membrane.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic flow chart of the film coating method of the present invention on a 3C product;

fig. 2 is a schematic structural diagram of a diaphragm according to an embodiment of the present invention.

The reference numbers illustrate:

1. a PMMA layer; 2. printing ink printing layer; 21. a pattern layer; 22. an adhesive layer; 3. ABS substrate layer

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a film coating method for a 3C product, which comprises the following steps:

heating an initial membrane to a preset temperature to soften the initial membrane, wherein the preset temperature is greater than or equal to 120 degrees and less than or equal to 160 degrees;

coating the softened initial membrane on a plastic suction mould, applying negative pressure, and cooling the initial membrane on the plastic suction mould to obtain a formed intermediate membrane;

cutting the intermediate membrane according to a preset cutting mode to obtain a target membrane;

embedding a target diaphragm into any one of the cavity wall of a male mold cavity and the cavity wall of a female mold cavity of an injection mold to fix the target diaphragm;

and closing the injection mold and performing injection molding to obtain the required initial product.

It can be understood that the design realizes the purpose of surface coating for 3C products by heating and softening the membrane, applying pressure to coat and attach the membrane on the outer surface of the suction mould, after the membrane is cooled, performing a stamping process on the membrane to separate the membrane from the suction mould, then performing a cutting process on the membrane to remove unnecessary membrane structures to form the shape of the outer surface of the 3C product to be processed, then embedding the membrane into a cavity of a corresponding injection mould, and performing injection moulding together with molten plastic. Compared with the traditional mode of coating the surface of the 3C product by painting and IML, the membrane disclosed by the invention can be stretched into a larger curved surface after being uniformly heated and softened, so that the membrane is favorably applied to the 3C product with the larger stretched curved surface, and the surface decoration effect and the three-dimensional texture effect of the product are further improved through the decoration pattern of the pattern layer 21 in the membrane.

Specifically, when the preset temperature is higher than 160 °, the diaphragm is easily heated and softened excessively, which is not beneficial to the subsequent pressurizing process of the diaphragm, and when the preset temperature is lower than 120 °, the softening effect of the diaphragm is easily poor, which is also not beneficial to the mutual attachment between the diaphragm and the plastic suction mold.

The technical proposal of the invention heats and softens the initial film used for decorating the 3C product, so as to be convenient for pressing the plastic film to make the plastic film attached to the plastic suction mould with a larger stretching curved surface, and through a preset cutting mode, cutting and polishing the initial diaphragm after high-pressure forming to obtain a target diaphragm with the same shape as the outer surface of the 3C product to be processed, then, the film coating process of the 3C product to be processed is realized through the operations of fixing the target membrane by the injection mold, injecting molten plastic into the target membrane and the like, compared with the mode of performing surface film coating on the 3C product by spray painting and IML in the prior art, the designed process method can be applied to the 3C product with a larger stretching curved surface, the application range is wider, and the surface decoration effect and the three-dimensional texture effect of the product are further improved through the decoration patterns of the pattern layer 21 in the membrane.

Optionally, before heating the initial membrane sheet, the following steps are included: and comparing the shape of the coiled membrane with that of the plastic suction model, and then cutting to obtain the initial membrane. It can be understood that the coiled membrane is cut based on the shape and area of the plastic suction model, so that the structural shape of the initial membrane is matched with that of the plastic suction model as much as possible, excessive material waste caused by the subsequent cutting process of the intermediate membrane is avoided, the process production cost is saved, and the feasibility of implementing the method is improved.

Optionally, after the initial film is wrapped in the plastic suction mold, the method includes the following steps: and carrying out vacuum treatment on the gap between the initial membrane and the plastic suction mould so as to form air pressure difference on two sides of the initial membrane. It can be understood that the side of the initial diaphragm departing from the plastic suction model forms a high-low pressure difference with the side of the adjacent plastic suction model, and then the softened initial diaphragm is pressed to a state of being attached to the outer wall of the plastic suction model.

Optionally, the intermediate membrane is processed by any one of cutting processes of water cutting, laser cutting or cutter cutting, so as to obtain the target membrane. It can be understood that the water cutting, the laser cutting or the cutter cutting is a cutting method widely used in the prior art, and has the advantages of convenient operation, fine cutting and the like, and certainly, in other implementations, the intermediate membrane can be processed by a plasma cutting and the like to obtain the target membrane, which is not limited to this.

Optionally, after obtaining the target diaphragm, the method includes the following steps: and fixing the male die or the female die, assembling a film conveying machine and the target membrane, and transferring and fixing the target membrane into a male die cavity or a female die cavity. The film conveying machine is used for conveying the target membrane before and after injection molding, and specifically, before the injection molding of the target membrane, the film conveying machine is connected with one side of the target membrane during injection molding, then drives the target membrane to move to the male mold cavity and abuts against the wall of the male mold cavity, and then is disconnected from the target membrane and leaves from the male mold cavity; after the injection mold is closed and the target diaphragm is subjected to injection molding, the film conveying machine is connected with one side of the target diaphragm, which deviates from the injection molding, and the target diaphragm is detached from the cavity wall of the female mold, so that the initial product is obtained. It should be noted that the present design is not limited to this, and in other embodiments, the target diaphragm may be fixed, and the injection molding process of the target diaphragm may be realized by moving the male mold and the female mold.

Optionally, after obtaining the initial product, the method comprises the following steps: opening the mold to take out the initial product and carrying out quality detection on the initial product so as to obtain a qualified product by screening. The quality monitoring and screening of the initial products are beneficial to improving the reliability of the quality of finished products of the process, specifically, after the qualified products are obtained, burrs of the qualified products are polished to obtain target products, and the target products are packaged, conveyed and stored in a warehouse to finish the process film coating process.

The invention also provides a diaphragm, which is applied to the film covering method of the 3C product, and particularly, the diaphragm which is applicable to the film covering method of the 3C product can have the following structural forms, wherein the diaphragm comprises a PMMA layer 1, an ink printing layer 2 and an ABS base material layer 3 which are sequentially connected, or comprises the PMMA layer 1 and the ABS base material layer 3 which are sequentially connected, or comprises a PC layer and the ABS base material layer 3 which are sequentially connected, of course, in order to improve the ornamental value of the diaphragm, the diaphragm can also be formed by the PMMA layer 1, the ink printing pattern layer 21, the ink printing adhesion layer 22 and the ABS base material layer 3 which are sequentially connected, and the whole thickness of the diaphragm is not more than 0.55mm so as to ensure the visual impression of the product after film covering.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.