CN102529472A - Transfer film and manufacturing method of appearance part with lines - Google Patents

Abstract

The invention discloses a transfer film and a manufacturing method of an appearance part with lines. The transfer film consists of a PET (Polyethylene Terephthalate) layer, a releasing layer and a solidified layer made of UV (Ultraviolet) materials, wherein connected concave and convex lines are formed on the first surface of the solidified layer made of the UV materials and can be transferred onto the surface of a plastic part in the injection-molding process to manufacture into the appearance part with the lines; and the releasing layer adhered onto the solidified layer made of the UV materials can facilitate automatic separation of the transfer film from the appearance part with the lines after the completion of injection-molding. Therefore, the method of the invention has the beneficial effects that different transfer films can be manufactured according to different appearance demands of different products, the different appearances of the different products can be realized through replacing the transfer films with the different lines in a same mold, and same appearances of same products can be obtained by continuous production for multiple times through one transfer film. Compared with prior arts, a large amount of mold opening and repairing time is saved, the versatility is strong, and the cost is greatly reduced.

Description

Transfer film and method for making appearance piece with texture

technical field

The invention belongs to the field of surface treatment of plastic parts, and in particular relates to a transfer film for making appearance parts with textures and a method for making appearance parts with lines using the transfer film.

Background technique

The texture of the traditional plastic surface is achieved by embossing the inner surface of the mold. Different embossing requires different injection molds. Therefore, the traditional process has the following disadvantages:

1. The production cost of injection mold is expensive and the production cycle is long;

2. The number of mold injections is limited, and the surface of the mold is easily damaged;

3. It takes a long time to repair the mold after damage, and it cannot be guaranteed to be consistent with the original texture.

Based on the above-mentioned shortcomings of the traditional process, it is necessary to develop a better process that can overcome the above-mentioned shortcomings to produce the texture on the surface of the plastic part.

Chinese patent application 200810241686.8 discloses a method for forming in-mold decorative products, including the following steps: providing a sheet, the first surface of which is formed with light-curable glue with texture; placing the sheet in an injection molding machine , injecting the base material onto the first surface of the sheet in an injection molding machine, removing the sheet, and obtaining an injection molded part with texture on the surface. However, the main defect of this method is that the sheet and the base material are not easy to separate, and the injection molded part needs to be heated to remove the sheet, but such heating can easily lead to texture deformation or damage, and it is time-consuming , It is impossible to realize the continuous use of the same sheet.

Contents of the invention

In order to overcome the above-mentioned defects, the present invention provides a structure of a transfer film and a method for using the transfer film to make a textured appearance part. The transfer film and the method for making a textured appearance part can be easily and conveniently produced Appearance parts with texture can be obtained, and compared with traditional techniques, it saves a lot of mold opening time and mold repair time, and has strong versatility.

The technical scheme that the present invention adopts in order to solve its technical problem is:

A transfer film, consisting of a PET layer, a release layer and a cured layer of UV material, the cured layer of the UV material is formed on one surface of the PET layer, and the release layer is attached to the UV The cured layer of the material, the cured layer of the UV material is located between the PET layer and the release layer, the side of the cured layer of the UV material opposite to the release layer is the first surface, and the second Concave-convex lines are formed on one surface, and the shape of the release layer conforms to the shape of the first surface and also has concavo-convex lines. Wherein, the UV material is a light-curing material, which needs to absorb ultraviolet rays to be completely cured, and is generally a single-liquid coating. The PET refers to polyethylene terephthalate. During injection molding, the textures on the first surface of the cured layer of the UV material and the release layer can be transferred to the surface of the plastic part, so that the surface of the plastic part has the same texture. The present invention has no special limitation on the shape of the lines, which can be customized according to different appearance requirements of different products.

Both the first surface and the release layer have a number of rough areas and a number of smooth areas, the rough areas are formed by the lines, and the parts without lines form the smooth areas. That is to say, the first surface and the release layer may not be completely textured, and textures may be provided in some areas according to needs, and the parts with textures form rough regions, while the parts without textures are smooth regions, and the second The rough area formed by the texture on a surface is further divided into a relatively smooth part and a relatively rough part, and the roughness of the relatively rough part is greater than the roughness of the relatively smooth part. During injection molding, the rough area and smooth area of the first surface and the release layer will be transferred to the surface of the injection molded part, so that the surface of the injection molded part has the same rough area as the first surface and the release layer And the smooth area, the rough area can cause a visually dark effect, the smooth area can cause a visually bright effect, and the rough area and smooth area have different handles, so that the product surface not only has a greater visual breakthrough , and enhanced touch. Of course, it is also possible to set lines on the first surface and the release layer according to the requirements, so that the surface of the injection molded part has lines, that is, the first surface and the release layer are all formed by lines. The rough area formed by the texture, and the rough area of the first surface is further divided into a relatively smooth part and a relatively rough part, and the roughness of the relatively rough part is greater than the roughness of the relatively smooth part Spend. Wherein, the thickness of the PET layer is 38um-78um, the thickness of the cured layer of the UV material is 0.005mm-0.1mm, and the thickness of the release layer is 0.005mm-0.02mm.

A method for making an appearance piece with textures, comprising the following steps:

①. Prepare the above-mentioned transfer film;

②. Using an injection molding mold, first position the transfer film in the cavity of the injection molding mold, and then inject plastic (which can be PC+ABS or PA+GF, etc.) In the cavity and injection molded on the release layer of the transfer film;

③. When the injection molding is completed and the mold is opened, the transfer film is automatically separated from the plastic to obtain a textured appearance part.

The present invention can produce different transfer films according to the different appearance requirements of different products. Different appearances of different products can be realized by replacing transfer films with different textures in the same set of molds, and the same appearance of the same product can be achieved by a piece of transfer printing. Membranes are produced multiple times in succession. Compared with the traditional process, it can save a lot of mold opening costs and mold repair time. Moreover, the setting of the release layer can facilitate the automatic separation of the transfer film from the textured exterior parts.

Wherein, said step 1. includes the following sub-steps:

A, make a template, the surface of the template has lines connected by concavo-convex;

B, coating the UV material on the surface of the template with lines;

C, covering the PET layer on the UV material;

D. Laminate the template, the coated UV material and the PET layer together and irradiate UV light to cure the UV material into a cured layer of the UV material;

E. Separate the template from the cured layer of the UV material, and combine the cured layer of the UV material with the PET layer;

F. Pressing a release layer on the cured layer of the UV material to obtain the transfer film.

The beneficial effects of the present invention are: the transfer film of the present invention is composed of a PET layer, a release layer and a cured layer of UV material, wherein the first surface of the cured layer of UV material is formed with concavo-convex connected lines, the The texture on the first surface can be transferred to the surface of the plastic part during injection molding to make a textured appearance part, and the release layer attached to the cured layer of the UV material can facilitate the transfer of the film and texture after the injection molding is completed The automatic separation of appearance parts; therefore, the present invention can make different transfer films according to the different appearance requirements of different products, and the different appearances of different products can be realized by replacing the transfer films with different textures in the same set of moulds. The same appearance can be produced multiple times continuously through a transfer film, which saves a lot of mold opening time and mold repair time compared with the traditional process. It has strong versatility and greatly reduces the cost.

Description of drawings

Fig. 1 is a transfer film structural diagram of the present invention;

Fig. 2 is the stacked structure of materials in the mold during injection molding of the present invention.

Detailed ways

Embodiment: a kind of transfer film, is made of the cured layer 2 of PET layer 1, release layer 3 and UV material, the cured layer 2 of described UV material is formed on a surface of described PET layer 1, and described release layer The type layer 3 is attached to the cured layer 2 of the UV material, the cured layer 2 of the UV material is located between the PET layer 1 and the release layer 3, the cured layer 2 of the UV material is connected to the The opposite side of the release layer 3 is the first surface 21, the first surface is formed with concavo-convex connected lines, the shape of the release layer 3 matches the shape of the first surface 21 and also has concavo-convex connected lines. texture. Wherein, the UV material is a light-curing material, which needs to absorb ultraviolet rays to be completely cured, and is generally a single-liquid coating. The PET refers to polyethylene terephthalate. During injection molding, the textures on the first surface of the cured layer of the UV material and the release layer can be transferred to the surface of the plastic part, so that the surface of the plastic part has the same texture. The present invention has no special limitation on the shape of the lines, which can be customized according to different appearance requirements of different products.

Both the first surface 21 and the release layer 3 have a number of rough areas and a number of smooth areas, the rough areas are formed by the lines, and the parts without lines form the smooth areas. That is to say, the first surface and the release layer may not be completely textured, and textures may be provided in some areas according to needs, and the textured parts form rough areas, while the non-textured parts form smooth areas. During injection molding, the rough area and smooth area of the first surface and the release layer will be transferred to the surface of the injection molded part, so that the surface of the injection molded part has the same rough area as the first surface and the release layer And the smooth area, the rough area can cause a visually dark effect, the smooth area can cause a visually bright effect, and the rough area and smooth area have different handles, so that the product surface not only has a greater visual breakthrough , and enhanced touch. Of course, according to requirements, textures can be provided on all of the first surface and the release layer, so that the surface of the injection molded part has textures.

Wherein, the thickness of the PET layer 1 is 38um-78um, the thickness of the cured layer 2 of the UV material is 0.005mm-0.1mm, and the thickness of the release layer 3 is 0.005mm-0.02mm.

A method for making an appearance piece with textures, comprising the following steps:

①. Prepare the above-mentioned transfer film;

2. Using an injection molding mold, first position the transfer film in the cavity of the injection molding mold, and then inject plastic 4 (which can be PC+ABS or PA+GF, etc.) into the cavity of the injection molding mold In the mold cavity and injection molded on the release layer of the transfer film;

③. When the injection molding is completed and the mold is opened, the transfer film is automatically separated from the plastic 4 to obtain a textured appearance part.

The present invention can produce different transfer films according to the different appearance requirements of different products. Different appearances of different products can be realized by replacing transfer films with different textures in the same set of molds, and the same appearance of the same product can be achieved by a piece of transfer printing. Membranes are produced multiple times in succession. Compared with the traditional process, it can save a lot of mold opening costs and mold repair time. Moreover, the setting of the release layer can facilitate the automatic separation of the transfer film from the textured exterior parts.

Wherein, said step 1. includes the following sub-steps:

A, make a template, the surface of the template has lines connected by concavo-convex;

B, coating the UV material on the surface of the template with lines;

C, covering the PET layer on the UV material;

D. Laminate the template, the coated UV material and the PET layer together and irradiate UV light to cure the UV material into a cured layer of the UV material;

E. Separate the template from the cured layer of the UV material, and combine the cured layer of the UV material with the PET layer;

F. Pressing a release layer on the cured layer of the UV material to obtain the transfer film.

Claims (8)

1. a transfer film, is characterized in that: be made of the cured layer of PET layer, release layer and UV material, the cured layer of described UV material is formed on a surface of described PET layer, described release layer Pasted on the cured layer of the UV material, the cured layer of the UV material is located between the PET layer and the release layer, and the side of the cured layer of the UV material opposite to the release layer is the second One surface, the first surface is formed with concavo-convex lines, and the shape of the release layer conforms to the shape of the first surface and also has concavo-convex lines. 2. The transfer film according to claim 1, characterized in that: both the first surface and the release layer have some rough areas and some smooth areas, and the rough areas are formed by the lines without The textured portion constitutes the smooth area. 3. The transfer film according to claim 2, characterized in that: the rough area formed by lines on the first surface is further divided into a relatively smooth part and a relatively rough part, and the relatively rough part The roughness of the portion is greater than the roughness of the relatively smooth portion. 4. The transfer film according to claim 1, characterized in that: the first surface and the release layer are all rough areas composed of textures. 5. The transfer film according to claim 4, characterized in that: the rough region formed by the texture on the first surface is further divided into a relatively smooth part and a relatively rough part, and the relatively rough part The roughness of is greater than that of the relatively smooth part. 6. The transfer film according to claim 1, characterized in that: the thickness of the PET layer is 38um-78um, the thickness of the cured layer of the UV material is 0.005mm-0.1mm, and the thickness of the release layer The thickness is 0.005mm to 0.02mm. 7. A method for making an appearance part with texture, characterized in that it comprises the following steps: 1. Prepare the transfer film as described in any one of claims 1 to 6; ②. Using an injection molding mold, first position the transfer film in the cavity of the injection molding mold, then inject plastic into the cavity of the injection molding mold and inject it on the release film of the transfer film. on the type layer; ③. When the injection molding is completed and the mold is opened, the transfer film is automatically separated from the plastic to obtain a textured appearance part. 8. The method for making a textured appearance part according to claim 7, characterized in that: said step ① includes the following sub-steps: A, make a template, the surface of the template has lines connected by concavo-convex; B, coating the UV material on the surface of the template with lines; C, covering the PET layer on the UV material; D. Laminate the template, the coated UV material and the PET layer together and irradiate UV light to cure the UV material into a cured layer of the UV material; E. Separate the template from the cured layer of the UV material, and combine the cured layer of the UV material with the PET layer; F. Pressing a release layer on the cured layer of the UV material to obtain the transfer film.

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