KR20140084706A - Apparatus and method of painting plastic parts - Google Patents

Abstract

An apparatus of painting plastic parts includes a first printing part which has first robots which firstly spray plastic parts with primer paint and a second printing part which has second robots which secondly spray the plastic parts with the primer paint and third robots which spray the plastic parts with base paint. The primer paint is sprayed twice, thereby forming uniform and thick primer paint.

Description

[0001] Apparatus and method of painting plastic parts [0002]

The present invention relates to an apparatus and method for coating plastic parts, and more particularly, to an apparatus and a method for coating plastic parts to uniformly and thickly coat the surfaces of plastic parts. .

Recently, plastics are widely used as automobile parts. The plastic is advantageous in that it is not corroded compared with metal and is light in weight and can be colored and molded. However, the plastic parts are susceptible to chemicals, erosion, ultraviolet rays, heat, and the like. Since scratches easily occur due to external forces and restoration is not easy, quality problems frequently occur and the quality level due to scratches It also deteriorates. Therefore, the surface is coated with paint to prevent deformation of the component and to reduce occurrence of the scratch.

The paints may have various colors. Among the hues of the above paints, white systems such as white pearl color should be coated thicker than primer paints of different colors due to their characteristics. However, due to the flowability of the white primer coating, it is difficult to form a uniform thickness.

The present invention provides a plastic part coating apparatus for forming a thick primer coating to a uniform thickness.

The present invention provides a plastic part coating method for thickening a primer coating to a uniform thickness.

The plastic part coating apparatus according to the present invention comprises a first coating part having first robots for primarily coating a primer coating material with plastic parts, second robots for applying the primer coating material to the second plastic parts, And a second coating portion having third robots for coating the paint with the plastic parts.

According to one embodiment of the present invention, the plastic part coating apparatus may further include a correction unit for correcting the coating material for primer primarily applied in the first coating unit.

According to one embodiment of the present invention, the plastic part coating apparatus includes a first drying unit for drying a primer coating primarily applied to the plastic part at room temperature, a primer coating material secondarily applied to the plastic part, And a second drying unit for drying the base coating material applied to the parts at room temperature.

According to one embodiment of the present invention, the plastic parts coating device may further include a third coating part having fourth robots for applying the clear coating material to the plastic parts. According to one embodiment of the present invention, the plastic parts coating apparatus may further include a baking unit for baking the primer coating, the base coating, and the clear coating material applied to the plastic parts. According to one embodiment of the present invention, the plastic part coating apparatus may further include a transfer part for transferring the plastic part in order of the first paint part, the second paint part and the third paint part.

The method of coating a plastic part according to the present invention comprises the steps of applying a coating material for primer with a plastic part, a step of applying the primer coating material to the plastic part to which the primer coating material is applied secondarily, And applying the base coating material to the plastic part to which the base coating composition is applied.

According to one embodiment of the present invention, the method of coating plastic parts may further include the step of correcting primer coating applied primarily to the plastic parts.

According to one embodiment of the present invention, the coating method of plastic parts comprises: drying a primer coating primarily applied to the plastic parts at room temperature; applying a primer coating applied secondarily to the plastic parts and a plastic primer coating And drying the base coating material at room temperature.

According to one embodiment of the present invention, the plastic part coating method may further include a step of applying the clear paint to the plastic part to which the base paint is applied. According to one embodiment of the present invention, the plastic part coating method may further include baking the primer coating, the base coating, and the clear coating material applied to the plastic parts.

According to the plastic parts coating apparatus and method of the present invention, the primer coating can be uniformly and thickly applied by applying the primer coating in two stages. Therefore, the color quality of the paint applied to the plastic part can be improved.

1 is a block diagram for explaining a plastic part paint apparatus according to an embodiment of the present invention.
2 is a flowchart for explaining a plastic part painting method according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus and method for coating a plastic part according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

1 is a block diagram for explaining a plastic part paint apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the plastic part coating apparatus 100 paints a plastic part used in a vehicle. Particularly, the plastic part coating apparatus 100 is for coating the plastic parts with a white system color such as white peal. Examples of the plastic parts include a bumper and a hood. Specific details of the composition of primer coating, base coating and clear coating material described below will be omitted since they are similar to general vehicle coating materials.

The plastic part coating apparatus 100 includes a transfer unit 110, a first coating unit 120, a correcting unit 130, a first drying unit 140, a second coating unit 150, a second drying unit 160, A third coating part 170, and a baking part 180.

The transfer unit 110 transfers the plastic part for painting the plastic part. For example, the transfer unit 110 may include a first coating unit 120, a correcting unit 130, a first drying unit 140, a second coating unit 150, a second drying unit 160, The plastic part can be transferred in the order of the plastic part 170, the baking part 180, and the like. Examples of the transfer unit 110 include a conveyor or a transfer robot.

The first paint part 120 includes first robots 122. The first robots 122 firstly apply the primer coating material to the plastic parts transferred by the transfer unit 110. The thickness of the primer coating formed through the primary coating is about 60 to 70% of the final thickness of the primer coating. Specifically, the first robots 122 apply the primer coating material at an injection amount of about 200 to 400 cc / min, and the thickness of the primary coating primer coating material may be about 17 to 20 탆.

The correction unit 130 may be provided adjacent to or spaced apart from the first coating unit 120. The correcting unit 130 corrects the primary coating paint for the primer. Specifically, the worker confirms the thickness of the primary coating paint for the primer, and applies the primer coating material to the thinner portion of the primer coating. Further, the worker confirms the flow of the primer coating material for primary coating, removes a portion where the primer coating material flows, and applies the primer coating material again. Therefore, the primary coating primer coating can have a relatively uniform thickness, and can have a high quality because there is no defect such as flowing down.

The first drying unit 140 dries the primary coating paint for the primer. The primary coating primer coating is naturally dried at room temperature. For example, while the plastic part is transferred by the transfer part 110, the primary coating primer coating may be naturally dried at a normal temperature.

The second coating unit 150 includes a second robot 152 and a third robot 154. The second robots 152 and the third robots 154 may be arranged in various forms. For example, the second robots 152 and the third robots 154 may be arranged alternately with respect to each other, or may be disposed separately from each other.

The second robots 152 secondarily apply the primer coating material to the plastic part transferred by the transfer unit 110. [ Specifically, the second robots 152 apply the primer coating material at an injection amount of about 200 to 400 cc / min, and the thickness of the second primer coating material may be about 8 to 10 탆. Therefore, the final thickness of the primer coating applied to the plastic part may be about 25 to 30 占 퐉.

Since the primer coating material is applied two times without being applied thickly at a time, it can be prevented that the primer coating material flows down or the thickness becomes uneven when applied. Therefore, the primer coating material can be uniformly and thickly applied.

The third robots 154 apply the base paint to the plastic parts. After the primer coating material is applied secondarily by the second robots 152, the third robots 154 may apply the base coating material. Also, after the surface of the primer coating material is dried after a predetermined time has elapsed since the primer coating material is applied secondarily, the third robot 154 may apply the base coating material.

Specifically, the third robots 154 apply the base coating material at an injection amount of about 200 to 400 cc / min, and the thickness of the applied base coating material may be about 8 to 12 탆.

As described above, the second coating unit 150 can apply the primer coating and the base coating.

The second drying unit 160 dries the secondary coating material for primer and the base coating material. Specifically, the second drying unit 160 primarily dries the base coating material exposed to the outside. The secondary coating primer coating and the base coating are naturally dried at room temperature. For example, while the plastic part is transferred from the second coating part 150 to the third coating part 170 by the transfer part 110, the secondary coating material for primer and the base coating material may be dried.

The third paint part 170 includes the fourth robots 172. The fourth robot 172 applies the clear paint to the plastic part. The clear paint is applied on the base paint for the plastic part. The clear paint is transparent and protects the paint for a base. Specifically, the fourth robot 172 applies the clear coating material at an injection amount of about 200 to 400 cc / min, and the thickness of the applied clear coating material may be about 28 to 32 탆.

The baking unit 180 bakes the primer coating, the base coating, and the clear coating material applied to the plastic parts. Specifically, the baking unit 180 bakes the primer coating, the base coating, and the clear coating for about 25 to about 35 minutes at a temperature of about 80 to 100 ° C. Therefore, the primer coating, the base coating, and the clear coating can be firmly cured.

2 is a flowchart for explaining a plastic part painting method according to an embodiment of the present invention.

Referring to FIG. 2, the plastic part painting method is for painting a plastic part used in a vehicle, and more particularly, for applying a white system color such as a white peel to the plastic part. The plastic part coating method is as follows.

First, the primer coating material is first applied to the plastic part (S110)

 The thickness of the primer coating formed through the primary coating is about 60 to 70% of the final thickness of the primer coating. Specifically, the primer coating material may be applied at an injection amount of about 200 to 400 cc / min, and the thickness of the primary coating primer coating material may be about 17 to 20 탆.

When the primary coating of the primer coating is completed, the primer coating for primary coating is corrected (S120)

 Specifically, the worker confirms the thickness of the primary coating paint for the primer, and applies the primer coating material to the thinner portion of the primer coating. Further, the worker confirms the flow of the primer coating material for primary coating, removes a portion where the primer coating material flows, and applies the primer coating material again. Therefore, the primary coating primer coating can have a relatively uniform thickness, and can have a high quality because there is no defect such as flowing down.

On the other hand, in the case where the primary coating primer coating has a uniform thickness and there is no defect such as running down, correction of the primary coating primer coating may be omitted.

When the primer coating for primary coating is completed, the primary coating primer coating is naturally dried at a room temperature (S130)

Drying of the primary coating primer coating may be performed while the plastic part is stopped, or the plastic part is being transported for the next process.

When the primer coating for primary coating is dried, the primer coating is applied secondarily to the plastic part (S140)

 Specifically, the primer coating material is applied at an injection amount of about 200 to 400 cc / min, and the thickness of the secondary coating primer coating material may be about 8 to 10 탆. Therefore, the final thickness of the primer coating applied to the plastic part may be about 25 to 30 占 퐉.

Since the primer coating material is applied two times without being applied thickly at a time, it can be prevented that the primer coating material flows down or the thickness becomes uneven when applied. Therefore, the primer coating material can be uniformly and thickly applied to the plastic part.

Next, the base paint is coated with the plastic part (S150)

After coating the primer coating material on the plastic part, the base coating material can be applied. At this time, the application of the base coating material may be performed after the surface of the primer coating material is dried after a certain time has elapsed after the primer coating material is applied secondarily.

Specifically, the base coating material may be applied at an injection amount of about 200 to 400 cc / min, and the thickness of the applied base coating material may be about 8 to 12 탆.

The secondary coating of the primer coating and the application of the base coating may be sequentially performed in the same area.

When the application of the base coating material is completed, the primer coating material and the base coating material are dried (S160)

 Specifically, the secondary coating primer coating and the base coating are naturally dried at room temperature. The base coating material exposed to the outside from the plastic part during drying may be mainly dried. The drying of the secondary coating primer coating and the base coating may be performed while the plastic part is stopped, or the plastic part is being transported for the next process.

Next, the clear paint is coated with the plastic part (S170)

The clear paint is applied on the base paint for the plastic part. The clear paint is transparent and protects the paint for a base. Specifically, the clear coating material may be applied at an injection amount of about 200 to 400 cc / min, and the thickness of the applied clear coating material may be about 28 to 32 탆.

When the clear paint is applied, primer paint, base paint and clear paint applied to the plastic parts are baked (S180).

Specifically, the primer coating material, the base coating material, and the clear coating material are baked by heating the plastic part at a temperature of about 80 to 100 ° C for about 25 to 35 minutes. Therefore, the primer coating, the base coating, and the clear coating can be hardened.

As described above, in the plastic part coating apparatus and method according to the present invention, the primer coating material can be uniformly applied thickly by applying the primer coating material twice. Therefore, the coating quality of the plastic parts can be improved.

In addition, even when the primer coating material is applied in a large thickness, defects such as thickness irregularity and running down can be minimized, so that the time and manpower required to correct the defective primer coating material can be minimized. Therefore, the productivity of the step of coating the plastic part can be improved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. It can be understood that it is possible.

100: plastic part paint device 110: transfer part
120: first coating unit 130:
140: second drying unit 150: second coating unit
160: second drying unit 170: third coating unit
180: Baking section

Claims (11)

A first coating unit having first robots for first coating a primer coating with plastic parts; And
And a second coating unit having second robots for applying the coating material for primer to the second plastic parts with the plastic parts and third robots for coating the base coating material with the plastic parts. The plastic part coating apparatus according to claim 1, further comprising a correcting unit for correcting the primer coating applied first in the first coating unit. [2] The apparatus of claim 1, further comprising: a first drying unit for drying the primer coating applied to the plastic part at a room temperature; And
Further comprising a second drying unit for drying the primer coating material secondarily applied to the plastic component and the base coating material applied to the plastic component at room temperature. The plastic part paint device according to claim 1, further comprising a third paint part having fourth robots for applying the clear paint to the plastic part. The plastic part coating apparatus according to claim 4, further comprising a baking unit for baking the primer coating, the base coating and the clear coating applied to the plastic part. The plastic part paint apparatus according to claim 4, further comprising a transfer unit for transferring the plastic part in the order of the first paint part, the second paint part and the third paint part. Applying primer coating material in a primary coating with plastic parts;
Applying the primer coating material to the plastic part to which the primer coating material is applied secondarily; And
And applying the base coating material to the plastic part coated with the primer coating material. The plastic part coating method according to claim 7, further comprising a step of correcting primer coating material primarily applied to the plastic parts. [8] The method of claim 7, further comprising: drying the primer coating primarily applied to the plastic component at room temperature; And
Further comprising a step of drying the primer coating material secondarily applied to the plastic part and the base coating material applied to the plastic part at room temperature. The method according to claim 7, further comprising the step of applying the clear paint to the plastic part to which the base paint is applied. 11. The method according to claim 10, further comprising the step of baking the primer coating, the base coating, and the clear coating applied to the plastic parts.

Images