Multi-axis Spindle Device for Ensuring Uniformity of Surface Painting of Cosmetic Containers and Painting Method Using the Same

Abstract

According to one embodiment, in a multi-axis spindle device for ensuring homogeneity of cosmetic container surface painting, configured to rotate by frictional contact with a belt of a belt assembly provided in a painting booth and arranged at equal intervals on a conveyor line, each of the multi-axis spindle devices comprises: a spindle base mounted on the conveyor line; a lower ball bearing in which an outer ring is press-fitted and fixed to the spindle base; a rotating member coupled to the inner ring of the lower ball bearing and in frictional contact with the belt; and a support column coupled to the rotating member on the upper side of the rotating member. The device includes a mounting member that is mounted on the upper side of the support column and fixes the cosmetic container (P), and the rotating member includes a friction part on its outer surface for frictional contact with the belt, and when the friction part frictionally contacts the belt, the rotating member, the support column, the mounting member, and the cosmetic container (P) rotate together, and the rotating member, the support column, and the mounting member can be easily separated from each other.

Description

Technology Field

[0001] The following embodiments relate to a multi-axis spindle device for ensuring homogeneity in the surface coating of cosmetic containers and a coating method using the same. Background Technology

[0002] Generally, cosmetic containers are formed in various shapes and sizes, such as round, oval, and square, depending on their intended use, and are coated in various colors according to their purpose and design.

[0003] The above cosmetic container undergoes a cleaning process before undergoing painting and coating operations, and then undergoes processes such as painting and drying. In order to facilitate surface painting of the above cosmetic container, a spindle device on which the cosmetic container is mounted is used, and conventionally, the spindle device was configured to rotate directly.

[0004] However, conventional technology consumes a lot of power because each spindle device is rotated, and problems arise where assembly is difficult and parts are worn out quickly due to the complexity of the rotary drive structure (motor, etc.) connected to the spindle device.

[0005] Furthermore, in addition to the aforementioned cosmetic device, paint is sprayed onto the spindle device; however, if this paint enters a complex rotary drive structure, problems such as damage to or failure of parts occur.

[0006] To overcome these problems, there is a need to develop technology that allows the spindle device to rotate without being connected to a rotary drive motor, gears, etc., and enables easy separation and mounting for cleaning. Prior art literature

[0007] (Republic of Korea Registered Patent Publication) No. 10-0437303 The problem to be solved

[0008] One embodiment aims to provide a multi-axis spindle device for ensuring homogeneity of cosmetic container surface painting and a painting method using the same, wherein the multi-axis spindle device is configured to rotate by frictional contact rather than being directly coupled to a rotary motor, thereby reducing power consumption and improving ease of assembly.

[0009] In addition, one embodiment aims to provide a multi-axis spindle device for ensuring homogeneity in the surface coating of a cosmetic container and a coating method using the same, by simplifying the coupling structure of the multi-axis spindle device so that detailed parts can be easily mounted and separated from each other, thereby facilitating cleaning. means of solving the problem

[0010] According to one embodiment of the present invention, a multi-axis spindle device for ensuring homogeneity of cosmetic container surface coating, configured to rotate by frictional contact with a belt of a belt assembly provided in a coating booth and arranged at equal intervals on a conveyor line, wherein each of the multi-axis spindle devices comprises: a spindle base mounted on the conveyor line; a lower ball bearing having an outer ring press-fitted and fixed to the spindle base; a rotating member coupled to the inner ring of the lower ball bearing and frictionally contacting the belt; and a support column coupled to the rotating member on the upper side of the rotating member. The device includes a mounting member that is mounted on the upper side of the support column and fixes the cosmetic container (P), and the rotating member includes a friction part on its outer surface for frictional contact with the belt, and when the friction part frictionally contacts the belt, the rotating member, the support column, the mounting member, and the cosmetic container (P) rotate together, and the rotating member, the support column, and the mounting member can be easily separated from each other.

[0011] Additionally, as the conveyor line is transported, a deceleration section is formed in which rotation is reduced when the friction part moves out of the contact section with the belt, and a manual deceleration device is further included to assist in deceleration after entering the deceleration section, and the manual deceleration device may include a deceleration ring provided on the multi-axis spindle device and a friction pad located on one side of the conveyor line, or an air pin radially provided on the support column.

[0012] Additionally, the belt assembly comprises: a belt drive motor; a belt pulley driven by the belt drive motor; a plurality of support rollers positioned parallel to the conveyor line and arranged at equal intervals to support the belt; and the belt, which is arranged to engage with the belt pulley and the support rollers and moves by the drive of the belt drive motor, wherein the belt may come into frictional contact with the friction portion of the rotating member.

[0013] Additionally, the device further includes a control unit that controls the driving of the belt drive motor and the conveyor line, wherein the spindle outer speed (Vs) of the spindle device is set to a range of 1.2 to 2.0 times the transfer speed of the conveyor line, and the control unit can control the belt drive motor so that the belt moves at a speed in the range of 1.05 to 1.20 times the spindle outer speed of the spindle device.

[0014] A method for painting using a multi-axis spindle device to ensure homogeneity of surface painting of a cosmetic container according to one embodiment, wherein the cosmetic container for painting is mounted on the multi-axis spindle device, the multi-axis spindle device is mounted on a conveyor line and transported, and after the multi-axis spindle device enters a painting booth, a rotating member of the multi-axis spindle device is rotated by frictional contact with a belt driven by a driving motor, and after leaving the contact section with the belt, the device has a structure that naturally decelerates due to inertia, the method comprising: a step of setting the viscosity (μ) of the paint; a step of setting the transport speed (L) of the conveyor line; a step of setting the spray flow rate (Q) and spray pressure (P) of the paint sprayed from a plurality of spray guns installed in the painting booth; and a step of setting the ratio (k=Vs / L) of the spindle circumference speed (Vs) and the transport speed (L) of the conveyor line in a range of 1.2 or more and 2.0 or less based on the viscosity (μ) and the spray flow rate (Q). The method comprises the steps of: calculating the target spindle outer speed (Vs=k*L) of the spindle device and the target spindle rotation speed (rpm) according to the radius (Rs) of the rotating member of the spindle device according to the set ratio (k); setting the slip ratio (s) occurring between the belt and the rotating member, and setting the driving speed (Vb=Vs / (1-s)) of the belt based on the slip ratio (s) so that the target spindle outer speed (Vs) of the spindle device is realized; and rotating the spindle device based on the set values ​​to spray paint onto the cosmetic container using the spray gun to paint; wherein the ratio (k) is set in the range of 1.2 to 1.5 for low-viscosity paint and in the range of 1.6 to 2.0 for high-viscosity paint, and the slip ratio (s) is 0.05 to 0.The multi-axis spindle device is set within a range of 10, and further includes a manual deceleration device to assist natural deceleration after exiting the contact section with the belt, and a spray gun positioned in the deceleration section after exiting the contact section with the belt can be adjusted to spray paint at a spray speed in the range of 0.2 to 0.5 compared to the spray speed of the spray gun positioned in the contact section with the belt. Effects of the invention

[0015] According to one embodiment of the present invention, since the multi-axis spindle device rotates by frictional contact with the belt of the belt assembly rather than being directly coupled to the rotary motor, power consumption is reduced, assembly convenience is improved, and the coupling structure can be simplified.

[0016] In addition, the multi-axis spindle device is configured so that detailed structures can be easily mounted and separated from each other through the simplification of the coupling structure, thereby making cleaning easy.

[0017] In addition, the above multi-axis spindle device can reduce unnecessary rotation, thereby preventing wear or failure of parts. Brief explanation of the drawing

[0018] FIG. 1 is a drawing showing a coating system according to one embodiment of the present invention. Figure 2 is a simplified drawing of the painting booth among the above painting systems. FIG. 3 is a perspective view of the multi-axis spindle device of the above-mentioned painting system. Figure 4 is a cross-sectional view of the multi-axis spindle device. Figure 5 is a block diagram for controlling the above-mentioned painting system. Figure 6 is a flowchart showing the painting process of the above-mentioned painting system. Specific details for implementing the invention

[0019] Hereinafter, embodiments are described in detail with reference to the attached drawings. However, various modifications may be made to the embodiments, and thus the scope of the patent application is not limited or restricted by these embodiments. It should be understood that all modifications, equivalents, and substitutions to the embodiments are included within the scope of the rights.

[0020] Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only and may be modified and implemented in various forms. Accordingly, the embodiments are not limited to the specific disclosed forms, and the scope of this specification includes modifications, equivalents, or substitutions that fall within the technical concept.

[0021] Terms such as "first" or "second" may be used to describe various components, but these terms should be interpreted solely for the purpose of distinguishing one component from another. For example, the first component may be named the second component, and similarly, the second component may be named the first component.

[0022] When it is stated that a component is "connected" to another component, it should be understood that it may be directly connected to or coupled with that other component, or that there may be other components in between.

[0023] The terms used in the embodiments are for illustrative purposes only and should not be interpreted as intended to be limiting. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "comprising" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0024] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the embodiments pertain. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0025] In addition, when describing with reference to the attached drawings, identical components are assigned the same reference numeral regardless of drawing symbols, and redundant descriptions thereof are omitted. In describing the embodiments, if it is determined that a detailed description of related prior art could unnecessarily obscure the essence of the embodiments, such detailed description is omitted.

[0026] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims.

[0027] In the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in the embodiments of the present invention.

[0028] The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining embodiments of the present invention are exemplary, and therefore the present invention is not limited to the depicted details. Furthermore, in describing the present invention, if it is determined that a detailed description of related known technology may unnecessarily obscure the essence of the present invention, such detailed description is omitted. Where terms such as "includes," "has," or "is made up" are used in this specification, other parts may be added unless "only" is used. Where a component is expressed in the singular, it includes cases where it includes the plural unless specifically stated otherwise.

[0029] In interpreting the components, they are interpreted to include a margin of error even in the absence of a separate explicit statement.

[0030] In the case of describing a positional relationship, for example, when the positional relationship between two parts is described using expressions such as 'on,' 'upper,' 'lower,' or 'next to,' one or more other parts may be located between the two parts unless 'immediately' or 'directly' is used.

[0031] When elements or layers are referred to as "on" another element or layer, this includes cases where another layer or element is placed directly on top of or in between. Throughout the specification, the same reference numerals refer to the same components.

[0032] The size and thickness of each component shown in the drawings are illustrated for convenience of explanation, and the present invention is not necessarily limited to the size and thickness of the illustrated components.

[0033] The features of each of the various embodiments of the present invention may be combined or combined with one another, either partially or wholly, and as will be fully understood by those skilled in the art, various technical interlocking and operation are possible, and each embodiment may be implemented independently of one another or together in an interlocking relationship.

[0034] FIG. 1 is a drawing showing a coating system according to one embodiment of the present invention.

[0035] Referring to FIG. 1, a coating system (1) according to one embodiment of the present invention may include a conveyor line (10) configured as an infinite loop and a multi-axis spindle device (20) mounted on the conveyor line (10). The multi-axis spindle device (20) may be mounted at equal intervals on the conveyor line (10).

[0036] That is, the multi-axis spindle device (20) can be understood as a device in which a plurality of spindle devices are arranged at equal intervals.

[0037] Additionally, the multi-axis spindle device (20) may be introduced or discharged at one location of the conveyor line (10). At this time, when introducing or discharging the multi-axis spindle device (20), an inspection may be performed.

[0038] The above-described painting system (1) may further include a cleaning booth (400), a painting booth (300), and a drying booth (500) through which the multi-axis spindle device (20) passes sequentially after being inserted. The multi-axis spindle device (20) may pass through the cleaning booth (400), the painting booth (300), and the drying booth (500) sequentially according to the transport of the conveyor line (10).

[0039] Additionally, a cosmetic container (P) may be mounted on the upper side of the multi-axis spindle device (20). The cosmetic container (P) mounted on the multi-axis spindle device (20) may be cleaned through the cleaning booth (400), painted through the painting booth (300), and dried through the drying booth (500).

[0040] The above cleaning booth (400), the above painting booth (300), and the above drying booth (500) can be passed through multiple times or more depending on the target painting form of the cosmetic container (P).

[0041] For example, one or more of the above-mentioned painting booths (300) may be provided. For example, if multiple of the above-mentioned painting booths (300) are provided, a first paint may be coated, and after the first paint is coated, a second paint may be coated.

[0042] The cleaning booth (400) above may perform a process of removing foreign substances and dust before painting the cosmetic container (P). For example, heat may be applied or a disinfectant may be applied to sterilize and remove foreign substances. However, it is not limited thereto, and any method for cleaning the cosmetic container (P) is possible.

[0043] The drying booth (500) can dry the cosmetic container (P) that has been painted while passing through the painting booth (300). For example, the drying booth (500) may be equipped with a UV lamp to dry the cosmetic container (P).

[0044] The above painting booth (300) can spray paint through a spray gun (310) in a situation where the multi-axis spindle device (20) entering the painting booth (300) according to the conveyor line (10) is rotated so that the cosmetic container (P) rotates together with the multi-axis spindle device (20).

[0045] The above conveyor line (10) can be driven and controlled by a conveyor line drive unit (15) to be described later. For example, the direction of movement and speed of movement of the conveyor line (10) can be controlled by the conveyor line drive unit (15).

[0046] Figure 2 is a simplified drawing of the painting booth among the above painting systems.

[0047] Referring to FIG. 2, the painting booth (300) may be equipped with a painting shelf (320) located on one side of the conveyor line (10), a plurality of support rollers (330) provided on the upper side of the painting shelf (320), a plurality of spray guns (310) provided on the painting shelf (320), a belt drive motor (340), belt pulleys (355, 357), and a belt (370) driven by engaging with the belt pulleys (355, 357) and the support rollers (330).

[0048] At this time, the belt drive motor (340), the belt pulley (355, 357), the plurality of support rollers (330), the belt pulley (355, 357), and the belt (370) driven by engaging with the support roller (330) can be defined as a belt assembly.

[0049] The above multiple support rollers (330) can be arranged at equal intervals to support the belt (370).

[0050] The above multiple support rollers (330) are arranged parallel to the conveyor line (10) and can be arranged at equal intervals from each other.

[0051] The support roller (330) may be spaced apart from the multi-axis spindle device (20) that is mounted on the conveyor line (10) and transported. The support roller (330) and the rotating member (230) of the multi-axis spindle device (20) may be arranged to have a spacing of G1.

[0052] The above spacing (G1) can be formed to be equal to or smaller than the thickness (t) of the belt (370).

[0053] That is, the belt (370) is positioned between the multi-axis spindle device (20) and the plurality of support rollers (330), and can be engaged with the plurality of support rollers (330) to wrap around the outer side of the plurality of support rollers (330).

[0054] Additionally, the belt (370) may be positioned to contact the belt pulleys (355, 357) on the outside of the belt pulleys (355, 357). That is, the belt (370) may be driven taut by the plurality of support rollers (330) and the belt pulleys (355, 357).

[0055] The belt pulleys (355, 357) may be provided in multiple numbers and arranged to drive the belt (370) tautly. The belt pulleys (355, 357) may be provided so as to be adjustable in position. That is, the position of the belt pulleys (355, 357) may be adjustable so that the belt (370) can make frictional contact with the rotating member (230) according to the radius (Rs) size of the rotating member (230) of the multi-axis spindle device (20).

[0056] Likewise, the position of the support roller (330) can be adjusted by a roller frame (335) that is installed on the painting shelf (320) and is configured to allow the position of the support roller (330) to be adjusted. That is, the position of the support roller (330) can be adjusted according to the radius (Rs) size of the rotating member (230) of the multi-axis spindle device (20) so that the belt (370) can make frictional contact with the rotating member (230).

[0057] Additionally, the belt drive motor (340) can drive the belt (370) by connecting it to either one of the belt pulleys (355, 357) via shaft or gear connection. That is, when the belt drive motor (340) is driven, the belt pulleys (355, 357) are driven by a rotational coupling relationship, and the belt (370) engaged with the belt pulleys (355, 357) can be driven.

[0058] The driving speed of the belt (370) can be controlled by the driving control of the belt drive motor (340).

[0059] The belt (370) can rotate the rotating member (230) of the multi-axis spindle device (20) by making frictional contact with the rotating member (230) of the multi-axis spindle device (20). Depending on the driving direction of the belt (370), the rotational direction of the rotating member (230) of the multi-axis spindle device (20) can be determined.

[0060] Referring to FIG. 2, as the belt (370) is driven in the same direction as the conveying direction of the conveyor line (10), the rotating member (230) of the multi-axis spindle device (20) can be rotated counterclockwise as the belt (370) and the rotating member (230) of the multi-axis spindle device (20) come into frictional contact.

[0061] Additionally, the multi-axis spindle device (20) entering the painting booth (300) can be rotated by frictional contact starting from the section where it begins to contact the belt (370). That is, in the painting booth (300), a contact section with the belt (370) can be formed.

[0062] Likewise, in the painting booth (300), a deceleration section may be formed in which the multi-axis spindle device (20), which is out of contact with the belt (370) according to the transport of the conveyor line (10), has its rotation reduced.

[0063] That is, in the above deceleration section, the multi-axis spindle device (20) can be decelerated and stopped because friction is eliminated.

[0064] The spray gun (310) may be provided in multiple numbers. The multiple spray guns (310) may be spaced apart at regular intervals along the direction of the conveyor line (10).

[0065] Specifically, some of the multiple spray guns (310) may be placed in the contact section with the belt (370), and others in the deceleration section.

[0066] The number of spray guns (310) placed in the contact section of the belt (370) may be greater than the number of spray guns (310) placed in the deceleration section.

[0067] Unlike the one shown in FIG. 2, the spray gun (310) can be positioned so that its height and spray angle are adjusted according to the characteristics of the paint to be sprayed and the painting conditions.

[0068] Additionally, an entry detection sensor (430) for detecting the entry of the multi-axis spindle device (20) may be located in the paint booth (300). The entry detection sensor (430) can detect whether the multi-axis spindle device (20) has entered or has not entered further.

[0069] Additionally, based on the value detected by the entry detection sensor (430), it can be determined at what point the multi-axis spindle device (20) begins to contact the belt (370). That is, by determining at what point the multi-axis spindle device (20) begins to contact the belt (370), the driving time of the belt (370) can be determined.

[0070] The above painting booth (300) may be equipped with a manual deceleration device (360) to assist in deceleration after the multi-axis spindle device (20) enters the deceleration section.

[0071] For example, the manual reduction device (360) may be composed of a reduction ring (361) provided on the multi-axis spindle device (20) and a friction pad (362) located on one side of the conveyor line (10).

[0072] As the deceleration ring (361) frictionally contacts the friction pad (362), rotational deceleration can proceed more quickly. At this time, the deceleration ring (361) may be positioned so as not to interfere with the friction portion (235) of the rotating member (230).

[0073] As another example, the manual deceleration device (360) may be located on the support column (250) of the multi-axis spindle device (20) described later and may be configured in the form of radially arranged air pins (363). The air pins (363) may assist in decelerating the multi-axis spindle device (20) by means of air resistance.

[0074] As another example, the manual deceleration device (360) may be configured as a viscous damper type provided in the multi-axis spindle device (20).

[0075] FIG. 3 is a perspective view of a multi-axis spindle device of the above-mentioned painting system, and FIG. 4 is a cross-sectional view of the above-mentioned multi-axis spindle device.

[0076] Referring to FIGS. 3 and 4, each of the multi-axis spindle devices (20) may include a spindle base (210) mounted on the conveyor line (10), a lower ball bearing (220) in which the outer ring is press-fitted and fixed to the spindle base (210), a rotating member (230) coupled to the inner ring of the lower ball bearing (220) and in frictional contact with the belt (370), a support column (250) coupled to the rotating member (230) on the upper side of the rotating member (230), and a mounting member (260) mounted on the support column (250) on the upper side of the support column (250) and fixing the cosmetic container (P).

[0077] At this time, due to the frictional contact between the rotating member (230) and the belt (370), the inner ring of the lower ball bearing (220), the rotating member (230), the support column (250), the mounting member (260), and the cosmetic container (P) can be rotated together.

[0078] Additionally, after the multi-axis spindle device (20) has exited the contact section with the belt (370), the inner ring of the lower ball bearing (220), the rotating member (230), the support column (250), the mounting member (260), and the cosmetic container (P) can be decelerated together during deceleration.

[0079] The spindle base (210) can be attached to the conveyor line (10) so as to be detachably attached. For example, the spindle base (210) can be attached to the conveyor line (10) by a rib connection or a sliding connection so as to be transported together with the conveyor line (10) during transport.

[0080] The spindle base (210) may include a first base groove (215a) formed by being recessed from the upper side, and a second base groove (215b) formed on the lower side of the first base groove (215a) with a diameter smaller than that of the first base groove (215a).

[0081] The outer ring of the lower ball bearing (220) can be pressed into the first base groove (215a).

[0082] In addition, due to the difference in diameter between the first base groove (215a) and the second base groove (215b), the lower ball bearing (220) can be fixed without being displaced.

[0083] The lower ball bearing (220) may be positioned so that only a portion of its depth is inserted into the first base groove (215a) and the remainder is exposed.

[0084] The above-mentioned rotating member (230) may include a rotating member body (251) and a lower extension part (232, 233) extending downward from the rotating member body (251).

[0085] The lower extension (232, 233) may include a first lower extension (233) formed with a diameter smaller than that of the rotating member body (251), and a second lower extension (232) extending from the first lower extension (233) and formed with a diameter smaller than that of the first lower extension (232).

[0086] The second lower extension (232) can be inserted into and coupled to the inner side of the inner ring of the lower ball bearing (220). Additionally, the insertion position of the second lower extension (232) can be fixed by the first lower extension (233).

[0087] In addition, due to the configuration of the first and second lower extension parts (232, 233), the rotating member (230) can be easily mounted and detached from the lower ball bearing (220). That is, through this structure, the rotating member (230) can be easily separated and easily cleaned.

[0088] The above-mentioned rotating member (230) may further include a friction portion (235) on its outer surface for frictional contact with the belt (370).

[0089] Specifically, the rotating member (230) may further include a friction portion (235) located on the outer surface of the rotating member body (251) and in frictional contact with the belt (370). The radius (Rs) of the rotating member (230) may be formed by including the thickness of the friction portion (235).

[0090] The friction part (235) may be made of a material that facilitates friction. For example, it may be formed of rubber.

[0091] As another example, the friction part (235) may be formed in an uneven shape.

[0092] The above-mentioned rotating member (230) may include an upper stepped portion (236) of the rotating member extending from the upper side of the rotating member body (251), an upper extension portion (237) extending upward from the upper stepped portion (236) of the rotating member, and an upper mounting portion (238) extending upward from the upper extension portion (237).

[0093] The outer diameter of the upper stepped portion (236) of the rotating member is larger than the outer diameter of the upper extension portion (237), and the outer diameter of the upper extension portion (237) can be formed to be larger than the outer diameter of the upper mounting portion (238).

[0094] The above multi-axis spindle device (20) may further include a rotational support member (240) for supporting the rotation of the rotating member (230) and an auxiliary ring (245). The rotational support member (240) may be placed on the upper stepped portion (236) of the rotating member and fitted to the outside of the upper extension portion (237).

[0095] For example, the above-mentioned rotary support member (240) may be a ball bearing or a support block.

[0096] The above auxiliary ring (245) can be fitted onto the outer surface of the upper mounting part (238) on the upper side of the rotational auxiliary support part (240).

[0097] The height of the upper mounting portion (238) may be formed to be longer than the thickness or height of the auxiliary ring (245).

[0098] The above-mentioned rotating member (230) may further include an insertion groove (231a) formed by being recessed from the upper mounting portion (238). The support column (250) is inserted and mounted in the insertion groove (231a), and the insertion groove (231a) may be formed up to a part of the interior of the rotating member body (251).

[0099] The support column (250) can be inserted into and mounted in the insertion groove (231a) of the rotating member (230). At this time, the insertion groove (231a) may be formed in a polygonal shape so that the support column (250) does not rotate freely during the rotation of the rotating member (230).

[0100] The above support column (250) can be easily inserted into or removed from the insertion groove (231a).

[0101] The above support column (250) may be formed in a hollow cylindrical shape. The above support column (250) may include a support body (251) forming an outer surface and a hole (251a) formed inside.

[0102] The mounting member (260) is inserted into the support column (250) and can hold the cosmetic container (P). The mounting member (260) may be formed in a 'T' shape, but is not limited thereto.

[0103] The above mounting member (260) may include a mounting body (261) and an insertion body (262) extending downward from the mounting body (261). The insertion body (262) may be pressed into the support column (250) or easily detachably connected.

[0104] For example, the insert member (260) can be connected to the support column (250) by a bayonet connection.

[0105] Due to the structural features of the multi-axis spindle device (20), when the friction part (235) of the rotating member (230) is rotated by frictional contact with the belt (370), the rotating member (230), the rotational assist support part (240), the assist ring (245), the support column (250), the mounting member (260), and the cosmetic container (P) can all rotate together.

[0106] The rotating member (230), the supporting column (250), and the mounting member (260) can be provided so as to be easily separated from each other.

[0107] In addition, due to the combined structure of the rotating member (230), the rotating auxiliary support member (240), the auxiliary ring (245), the support column (250), and the mounting member (260), the multi-axis spindle device (20) can be easily separated and mounted when necessary, so that it can be easily cleaned even if it becomes dirty with repeated spray paint.

[0108] In addition, the radius (Rs) of the rotating member (230) can be easily changed by mounting a rotating member (230) of a different shape, and the shape of the mounting member (260) and the support column (250) can also be easily changed according to the shape of the cosmetic container (P).

[0109] Figure 5 is a block diagram for controlling the above-mentioned painting system.

[0110] Referring to FIG. 5, the painting system (1) may include a control unit (30), a sensor unit (40), and a plurality of drive units. The control unit (30) may control a spray gun drive unit (315) capable of adjusting the position and spray angle of the spray gun (310), the paint spraying speed and spray amount, a belt drive motor (340) controlling the drive of the belt (370), a conveyor line drive unit (15) controlling the drive of the conveyor line (10), and a manual reduction device drive unit (365) controlling the drive of the manual reduction device (360).

[0111] The above control unit (30) can control the operation of the belt drive motor (340) and the conveyor line (10).

[0112] The control unit (30) can control the operation of the plurality of driving units based on the value detected by the sensor unit (40).

[0113] The sensor unit (40) may include the entry detection sensor (430) and the paint detection sensor (435) that detects the paint result of the cosmetic container (P). In addition, the sensor unit (40) may detect various data necessary to control the operation.

[0114] The spindle outer speed (Vs) of the spindle device (20) can be set to a range of 1.2 to 2.0 times the conveying speed (L) of the conveyor line (10). The control unit (30) can control the belt drive motor (340) so that the belt (370) moves at a speed in the range of 1.05 to 1.20 times the spindle outer speed (Vs) of the spindle device (20).

[0115] The spindle outer circumference speed (Vs) can be understood as a linear speed indicating how much the outer surface of the rotating member (230) of the spindle device (20) moves per unit time. The rotational speed of the spindle device (20) can be understood as rpm considering the rotational radius (Rs) of the rotating member (230).

[0116] Figure 6 is a flowchart showing the painting process of the above-mentioned painting system.

[0117] Referring to FIG. 6, the control unit (30) can set the characteristics of the paint to be sprayed onto the cosmetic container (P) and the painting conditions (S100). The characteristics of the paint and the painting conditions may include the shape, surface, curvature, reflectivity, film thickness requirements, and surface appearance quality requirements (gloss, etc.) of the cosmetic container (P). Additionally, the type of paint, dilution ratio, and applicable viscosity range may also be included.

[0118] Additionally, the control unit (30) can set the viscosity (μ) of the paint (S200). Specifically, the control unit (30) can set the viscosity (μ) of the paint based on the shape of the cosmetic container (P), the required film thickness, and the recommended viscosity range of the paint.

[0119] The viscosity (μ) of the above paint is determined to be a relatively low value for high-gloss coating or thin-film coating, and can be set to a relatively high value when opacity or thick-film coating is required.

[0120] Specifically, since low-viscosity paints are prone to flowing, low spindle rotation speeds or low spray volumes may be required in rotation speed control. On the other hand, since high-viscosity paints have low spreadability, high spindle rotation speeds or spray volumes may be required.

[0121] The control unit (30) can set the conveying speed (L) of the conveyor line (10) (S300). The conveying speed (L) of the conveyor line (10) can directly affect the formation of the film thickness.

[0122] The control unit (30) can set the spray flow rate (Q) and spray pressure (P) of the paint sprayed from a plurality of spray guns (310) installed in the paint booth (300) (S400). In addition, the control unit (30) can also determine the nozzle pattern, spray angle, etc. The control unit (30) can determine the spray flow rate (Q) using the required film thickness, the conveying speed (L) of the conveyor line (10), and the length (l) of the contact section with the belt (370). At this time, the spray flow rate (Q) can be increased as the viscosity increases and decreased as the viscosity decreases, thereby preventing flow.

[0123] The control unit (30) can set the spindle rotation speed ratio (k) of the spindle device (20) based on the determined viscosity (μ) and the spray flow rate (Q) (S500). Specifically, the spindle rotation speed ratio (k) may be the ratio (k=Vs / L) of the spindle circumference speed (Vs) of the spindle device (20) and the conveying speed (L) of the conveyor line (10). The spindle rotation speed ratio (k) may be a key factor in the quality of the coating. The control unit (30) may set the spindle rotation speed ratio (k) in the range of 1.2 or more and 2.0 or less.

[0124] The spindle rotation speed ratio (k) can be set in the range of 1.2 to 1.6 for low-viscosity paints and in the range of 1.6 to 2.0 for high-viscosity paints.

[0125] For example, when a low-viscosity paint is sprayed at a low spray amount (Q), k may be determined to be in the range of 1.2 to 1.4; when a low-viscosity paint is sprayed at a high spray amount (Q), k may be determined to be in the range of 1.4 to 1.6; when a medium-viscosity paint is sprayed at an intermediate spray amount (Q), k may be determined to be in the range of 1.5 to 1.8; and when a high-viscosity paint is sprayed at an intermediate or higher spray amount (Q), k may be determined to be in the range of 1.8 to 2.0.

[0126] The control unit (30) can calculate the target spindle circumferential speed (Vs) of the spindle device (20) and the target spindle rotation speed (rpm) according to the radius of the rotating member (Rs) of the spindle device (20) according to the set ratio (k) (S600). The spindle circumferential speed (Vs) can be calculated according to the relationship of the spindle rotation speed ratio (k), and can be calculated as rpm = 60 * Vs / (2 * pi * Rs). At this time, the target spindle rotation speed (rpm) can be understood as the target rotation speed of the spindle device (20) to be achieved in the painting booth (300).

[0127] The target spindle outer speed (Vs) of the spindle device (20) can be set to decrease as the radius of the rotating member (Rs) of the spindle device (20) increases, and to increase as the radius of the rotating member (Rs) decreases, depending on the radius of the rotating member (Rs) of the spindle device (20).

[0128] The control unit (30) can set a slip rate (s) occurring between the belt (370) and the rotating member (230), and can set a driving speed (Vb=Vs / (1-s)) of the belt (370) based on the slip rate (s) so that the target spindle outer speed (Vs) of the spindle device (20) is realized (S700).

[0129] The driving speed (Vb) of the belt (370) can be set to be at least 1.05 times and no more than 1.20 times the target spindle circumference speed (Vs) of the spindle device (20).

[0130] The spindle device (20) is rotated by friction with the belt (370), and at this time, a slip rate (s) may occur due to the material of the friction part (235), paint dust, tension of the belt (370), etc.

[0131] The above slip ratio(s) can be set in the range of 0.05 to 0.10.

[0132] When the driving speed (Vb) of the belt (370) is set, the control unit (30) can drive and control the belt drive motor (340).

[0133] The above control unit (30) can control the spindle device (20) to rotate based on the above-set values ​​and spray paint onto the cosmetic container (P) using the spray gun (310) to paint it (S800).

[0134] Additionally, the control unit (30) can control the spray speed of the spray gun (310) placed in the deceleration section. At this time, the control unit (30) can adjust the spray gun (310) placed in the deceleration section after leaving the contact section with the belt (370) to spray paint at a spray speed in the range of 0.2 to 0.5 compared to the spray speed of the spray gun (310) placed in the contact section with the belt (370).

[0135] Additionally, the control unit (30) can further adjust the rotation ratio (k) or the driving speed (Vb) of the belt (370) based on the length of the belt (370) contact section (L_belt) in the painting booth (300) and the conveying speed (L) of the conveyor line (10) so that the acceleration time (T_contact=L_belt / L) of the spindle device (20) and the spray residence time (T_spray) of the painting booth (300) are achieved near the target rotation speed (rpm) (S900).

[0136] Although embodiments of the present invention have been described in more detail with reference to the attached drawings, the present invention is not necessarily limited to these embodiments and may be modified in various ways within the scope of the technical spirit of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. The scope of protection of the present invention shall be interpreted by the claims below, and all technical spirits within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention.

[0137] Therefore, other implementations, other embodiments, and equivalents to the claims also fall within the scope of the claims set forth below. Explanation of the symbols

[0138] 1 : Painting system 10 : Conveyor line 20: Spindle unit 30: Control unit 300 : Painting booth 400 : Cleaning booth 500 : Drying booth

Claims

Claim 1 delete Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 A method for painting using a multi-axis spindle device to ensure homogeneity of surface painting of a cosmetic container, wherein the cosmetic container for painting is mounted on the multi-axis spindle device, the multi-axis spindle device is mounted on a conveyor line and transported, and after the multi-axis spindle device enters a painting booth, the rotating member of the multi-axis spindle device rotates by frictional contact with a belt driven by a drive motor, and after leaving the contact section with the belt, naturally decelerates due to inertia, the method comprises the steps of: setting the viscosity (μ) of the paint; setting the transport speed (L) of the conveyor line; setting the spray flow rate (Q) and spray pressure (P) of the paint sprayed from a plurality of spray guns installed in the painting booth; setting the ratio (k = Vs / L) of the spindle circumference speed (Vs) and the transport speed (L) of the conveyor line within a range of 1.2 or more and 2.0 or less based on the viscosity (μ) and the spray flow rate (Q); and according to the set ratio (k), the spindle device The method comprises: a step of calculating a target spindle rotation speed (rpm) based on a target spindle outer circumference speed (Vs=k*L) and a radius (Rs) of a rotating member of the spindle device; a step of setting a slip ratio (s) occurring between the belt and the rotating member, and based on the slip ratio (s), setting a driving speed (Vb=Vs / (1-s)) of the belt so that the target spindle outer circumference speed (Vs) of the spindle device is realized; and a step of rotating the spindle device based on the set values ​​to spray paint onto the cosmetic container using the spray gun to paint, wherein the ratio (k) is set in the range of 1.2 to 1.5 for low-viscosity paint and in the range of 1.6 to 2.0 for high-viscosity paint, and the slip ratio (s) is 0.05 to 0.A painting method using a multi-axis spindle device for ensuring homogeneity of cosmetic container surface painting, wherein the multi-axis spindle device is set within a range of 10, and further includes a manual deceleration device to assist natural deceleration after exiting the contact section with the belt, and a spray gun positioned in the deceleration section after exiting the contact section with the belt is adjusted to spray paint at a spray speed in the range of 0.2 to 0.5 compared to the spray speed of the spray gun positioned in the contact section with the belt.

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